WO2020246183A1 - Coating film removal device, coating film removal method, and joining device - Google Patents
Coating film removal device, coating film removal method, and joining device Download PDFInfo
- Publication number
- WO2020246183A1 WO2020246183A1 PCT/JP2020/018076 JP2020018076W WO2020246183A1 WO 2020246183 A1 WO2020246183 A1 WO 2020246183A1 JP 2020018076 W JP2020018076 W JP 2020018076W WO 2020246183 A1 WO2020246183 A1 WO 2020246183A1
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- WIPO (PCT)
- Prior art keywords
- rolls
- steel plate
- abrasive
- brush
- roll
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
- B24B7/10—Single-purpose machines or devices
- B24B7/12—Single-purpose machines or devices for grinding travelling elongated stock, e.g. strip-shaped work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/06—Resistance welding; Severing by resistance heating using roller electrodes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/34—Preliminary treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B29/00—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents
- B24B29/02—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents designed for particular workpieces
- B24B29/06—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents designed for particular workpieces for elongated workpieces having uniform cross-section in one main direction
Definitions
- the present invention relates to a technique for removing a surface coating formed on a joint portion prior to overlapping and joining the ends of two metal plates, such as mash seam welding.
- Patent Document 1 proposes a welding apparatus having a function of removing a surface coating.
- the device of Patent Document 1 includes a brush as a rotary tool for removing the surface coating, and the brush can be raised and lowered by a cylinder.
- the surface coating can be removed by placing the brush at an appropriate position with respect to the metal plate to be joined.
- the contact state between the brush and the metal plate becomes non-uniform. Then, it may occur that the surface coating can be removed in one portion, but the surface coating cannot be removed sufficiently in another portion.
- the present invention provides a removing device, a removing method, and a joining device provided with the removing device capable of stably removing the surface coating even if the metal plate is deformed due to undulations at the ends. The purpose.
- the coating removing device comprises a rotating body supported by a rotating shaft, and the surface coating is removed by a pair of abrasives for removing surface coatings formed on the front and back surfaces of a joining target and a pair of abrasives.
- a pair of pressurizing bodies that hold the joining target from the front and back and pressurize while moving against the joining target are provided, and the outer end of the abrasive and the pressurizing body that contacts each joining target is in the direction of the rotation axis. Arranged side by side.
- the present invention is a method of removing the surface coating formed on the front and back surfaces of an object to be joined by rotating a grinding material composed of a pair of rotating bodies provided on each of the front and back surfaces, in which the grinding material is removed in the axial direction of rotation of the grinding material.
- a pair of pressurizing bodies arranged side by side and on the front and back sides sandwich the object to be joined from the front and back sides, pressurize the object to be joined while moving, and remove the surface coating with a pair of abrasives.
- the present invention is a joining device for superimposing and joining the ends of a first joining target and a second joining target, and the surfaces formed on the front and back surfaces of the first joining target and the second joining target to be overlapped.
- a film removing portion for removing the coating film and a joining portion for joining the first joining target from which the surface coating has been removed and the end portions of the second joining target in a superposed state are provided.
- the film removing portion in the present invention includes a pair of abrasives for removing surface coatings formed on the front and back surfaces of the first bonding object and the second bonding object, and a first bonding object for which the surface coating is removed by the grinding material.
- a pair of pressurizing bodies that pressurize each of the second joining objects by sandwiching them from the front and back are provided.
- the coating removal according to the present invention when the surface coating is removed by the pair of abrasives, the bonding target is pressed from the front and back by the pair of pressurizing bodies, so that the bonding target is deformed due to undulation or the like. Deformation is reduced, at least in the pressurized portion during pressurization, and the relative position of the object to be joined with respect to the abrasive can be kept constant. As a result, the reaction force applied to the abrasive from the bonding target can be made uniform, so that the surface coating can be stably removed.
- the outer end of the abrasive and the outer end of the pressurizing body are arranged in the direction of the rotating shaft because the grinding material and the pressurizing body are arranged side by side in the direction of the rotating shaft. Can be brought close to. Then, since the grinding material can be used to grind the portion of the jointed object whose deformation has been corrected by the pressurizing body, the surface coating can be stably removed from the bonded object.
- a schematic configuration of the joining device according to the first embodiment of the present invention is shown, (a) is a side view, and (b) is a plan view. It is a front view which shows the schematic structure of the surface film removal part which concerns on 1st Embodiment. It is a side view which shows the schematic structure of the surface film removal part which concerns on 1st Embodiment.
- the operation of the surface coating removing portion according to the first embodiment is shown, (a) shows a standby state in which the surface coating is not removed, (b) shows a working state in which the surface coating is removed, and (c) faces the steel sheet.
- the movement locus of the tip of the brush roll is shown.
- FIG. 6 shows a partial front view which shows each process in the joining apparatus which concerns on 1st Embodiment, (a) shows a film removal process, (b) shows a shearing process, (c) shows a welding process, (d) Indicates a reduction process. Following FIG. 6, (a) shows a cooling step, (b) shows a heating step, and (c) shows an air cooling step.
- the joining device of the first embodiment shows the process of moving in the outward path, (a) shows the position when the welding device is in the retracted position, (b) shows the position in the film removing step, and (c) shows the cutting. Indicates the position during the process.
- FIG. 8 the process in which the joining device moves on the return path is shown, (a) the position during the welding step and the reduction step is shown, (b) shows the position during the cooling step, and (c) shows the heating step.
- the position at the time of the process is shown, and (d) shows the time when it returns to the retracted position. It is a figure which shows the positional relationship of a pair of holding rolls in the modified example of 1st Embodiment.
- FIG. 10 It is a figure explaining the effect obtained by adopting the positional relationship of the presser roll shown in FIG. 10, (a) corresponds to the AA cross section of FIG. 10, and (b) is the BB cross section of FIG. Corresponds to, and (c) corresponds to the CC cross section of FIG. (A) and (b) are diagrams for explaining the first means corresponding to the wear of the brush roll in the first embodiment. (A) to (c) are diagrams for explaining the second means corresponding to the wear of the brush roll in the first embodiment. It is a figure which shows concretely the structure shown in FIG. 13C. It is a figure which shows the alternative means of the presser roll as a pressurizing body in the modification of this invention.
- FIG. 1 It is a vertical cross-sectional view which shows a part of the film removal part including the eccentric structure adopted in the joining apparatus which concerns on 2nd Embodiment of this invention. It is the XVII-XVII line arrow view of FIG. It is a schematic diagram which shows the state which the presser roll was eccentrically rotated with respect to the brush roll of the initial wire length. It is a schematic diagram which shows the state that the presser roll was eccentrically rotated according to the wear amount of the brush roll. It is a schematic diagram which shows the protrusion amount at the contact point between a steel plate and a brush of a brush roll.
- FIG. 5 is a flowchart showing an example of a procedure for adjusting the protrusion amount, which includes a step of rotating the eccentric axis at a rotation angle according to the wear amount of the brush roll, in relation to the film removal step using the film removing portion of the second embodiment.
- the joining device 1 according to a preferred embodiment of the present invention will be described with reference to the drawings.
- the joining device 1 is provided in the middle of the transport path P1 (FIG. 1 (b)) through which the steel plate S (FIG. 1 (b)) to be joined is conveyed, and the steel plate S and the ends of the steel plate S are welded to each other.
- the joining device 1 includes a coating removing portion 60 capable of stably removing the coating even if the end portion of the steel plate S to be joined is deformed due to undulation or the like.
- the configuration and operation of the joining device 1 will be described in order, and then the effects of the joining device 1 will be referred to.
- the joining device 1 includes a welded portion 20 for performing mash seam welding (JIS Z 3001) and a compression lower portion 30 for pressurizing a portion welded by the welded portion 20.
- This welded portion includes a portion where the rear end of the leading steel plate S1 (FIG. 2) and the tip of the trailing steel plate S2 (FIG. 2) are overlapped with each other, and has a thicker step than the welded portion. 30 improves the degree of flattening by crushing this step until the wall thickness is substantially the same as that of other portions.
- the joining device 1 includes a cooling unit 40 that supplies spray water to the welded portion that has been reduced by the reduction portion 30, and a heating unit 50 that heats the welded portion to which the spray water has been supplied.
- the joining device 1 includes a film removing portion 60 that mainly removes the oxide scale on the surface of the steel sheet S to be joined before welding, and a steel plate S from which the surface coating such as the oxide scale is removed by the film removing portion 60. It includes a cutting portion 90 for cutting the end portion by shearing.
- the joining device 1 includes a control device 1A that controls the operations of the welded portion 20, the compression lower portion 30, the cooling portion 40, the heating portion 50, the film removing portion 60, and the cutting portion 90.
- the welded portion 20, the compression lower portion 30, the cooling portion 40, the heating portion 50, the film removing portion 60, and the cutting portion 90 are supported by the moving frame 10.
- the moving frame 10 reciprocates with respect to the predetermined transport path P1 of the steel plate S in a direction orthogonal to the direction of the transport path P1, and the welded portion 20, the compression lower portion 30, the cooling portion 40, the heating portion 50,
- the film removing portion 60 and the cutting portion 90 also reciprocate with respect to the transport path P1 along with this reciprocating movement.
- the moving frame 10 As shown in FIG. 1A, the moving frame 10 has a C-shaped shape when viewed from the side, and has a connection end 11A along the height direction H at one end in the side view and the other. An opening 11B is provided at the end. The height direction H coincides with the vertical direction v. As shown in FIG. 1B, the moving frame 10 is arranged with the opening 11B facing the transport path P1. In the moving frame 10, the side where the opening 11B is provided is defined as the front (F), and the side where the connection end 11A is provided is defined as the rear (B).
- the moving frame 10 includes a pair of upper and lower support bases 12A and 12B that are connected to the connection end 11A and extend toward the front (F).
- the support bases 12A and 12B are provided along the length direction L at predetermined intervals in the height direction H.
- the support base 12A is arranged above and the support base 12B is arranged below.
- the length direction L coincides with the horizontal direction h.
- the support base 12B is provided with a plurality of wheels 13, 13 ... Required for moving the moving frame 10 on the side of the lower surface 14.
- the wheel 13 can reciprocate the moving frame 10 by rotating forward or reverse with a drive source (not shown).
- the wheel 13 is just an example, and for example, a linear guide can be used as a means of transportation. According to the linear guide, there is an advantage that the movement of the moving frame 10 is smoother and the position of the moving frame 10 in the vertical direction is easily stabilized.
- a heating portion 50, a coating removing portion 60, a cooling portion 40, a compression lower portion 30, a welding portion 20, and a cutting portion 90 are provided in this order from the front side.
- the moving frame 10 has at least a position of retracting from the transport path P1 (FIGS. 1 and 8 (a): retracted position) and a cutting portion 90 supported by the moving frame 10 reaches the transport path P1 to completely complete the steel plate S. It reciprocates between the position where it can be cut (FIG. 8 (c): forward position) and the position where it can be cut.
- the direction in which the moving frame 10 reciprocates is the same as the welding direction of the steel plate S. Even if the moving frame 10 passes the forward position to some extent, it may move backward and adjust the position when cutting the steel plate S.
- a transport path P1 for transporting the steel plate S is arranged on the front side of the moving frame 10 placed in the retracted position.
- the moving frame 10 reciprocates, the steel plate S moves relatively forward and backward between the support base 12A and the support base 12B of the moving frame 10.
- the path through which the steel plate S moves between the support base 12A and the support base 12B is referred to as a movement path P2.
- the moving path P2 and the transport path P1 are orthogonal to each other.
- the moving frame 10 stands by at a position retracted from the transport path P1 in a retracted position until the steel plate S is transported. When the steel plate S is conveyed, the moving frame 10 moves from the retracted position to the forward position. In the outward path in which the moving frame 10 moves from the retracted position to the forward position, the surface coating of the steel plate S is removed by the coating removing portion 60, and the steel plate S is cut by the cutting portion 90. Although details will be described later, the operation of this outbound route is shown in FIGS. 8A, 8B, and 8C.
- the moving frame 10 moves on the outward route and reaches the forward position, it moves on the return route that returns to the backward position.
- welding, flattening of the welded portion, and heat treatment of the welded portion are continuously performed by making the welded portion 20, the compression lower portion 30, the cooling portion 40, and the heating portion 50 function.
- the film removing portion 60 and the cutting portion 90 that function on the outward route will be described, and then the welded portion 20 to the heating portion 50 that function on the return route will be described.
- the film removing portion 60 removes the surface film of the portion of the steel sheet S where welding is planned. Even if the portion to be welded is deformed due to undulations or the like, the film removing portion 60 is stable by providing pressing rolls 62A and 62B as a pressurizing material for flattening the deformation when removing the film. Achieves removal of surface coating.
- the coating removing portion 60 includes brush rolls 61A and 61B as a pair of upper and lower abrasives, and support brackets 64A for supporting the brush rolls 61A and 61B, respectively. , 64B, and so on.
- the brush rolls 61A and 61B are rotatably supported by the support brackets 64A and 64B, and are fixed to the spindles 63A and 63B to which a rotational driving force is applied.
- the brush rolls 61A and 61B are rotatably supported around the spindles 63A and 63B by a spindle bearing (not shown) built in the support brackets 64A and 64B.
- the holding rolls 62A and 62B are supported by bosses (fixed shafts) provided on the support brackets 64A and 64B so as to surround the spindle bearings via another bearing.
- the presser rolls 62A and 62B are mounted coaxially with the brush rolls 61A and 61B so as to idle on the spindles 63A and 63B.
- the spindle bearing and another bearing for example, the bearing B1 and the bearing B3 shown in FIGS. 16 and 17 can be adopted.
- pressing refers to the pressing roll 62A by interposing a bearing between the rotating shafts of the brush rolls 61A and 61B and the pressing rolls 62A and 62B, or by adopting a clutch mechanism (not shown).
- 62B do not follow the rotation of the brush rolls 61A and 61B, and pressurize the steel plate S with the steel plate S in between, and as the moving frame 10 moves in the length direction L due to friction with the steel plate S, the steel plate It means moving in the same direction as the moving frame 10 while rotating on S. That is, the pressing rolls 62A and 62B are separated from each other with respect to the rotation of the brush rolls 61A and 61B.
- two pairs of upper and lower brush rolls 61A and 61B are provided side by side at intervals in the direction of the transport path P1.
- the brush rolls 61A and 61B provided on the upstream side ⁇ of the transport path P1 are provided on the downstream side ⁇ of the transport path P1 after removing the surface coating of one of the steel plates S to be welded.
- the brush rolls 61A and 61B remove the surface coating of the other steel plate S (S2) to be welded. Since one steel plate S (S1) is conveyed to the joining device 1 prior to the other steel plate S (S2), it is called a leading steel plate S1, and the other steel plate S is a steel plate S of one. Since it is subsequently conveyed to the joining device 1, it is referred to as a trailing steel plate S2. When it is not necessary to distinguish between the two, they are collectively referred to as a steel plate S.
- the brush roll 61A and the brush roll 61B are arranged so as to face each other above and below the height direction H with the movement path P2 in between.
- the brush roll 61A and the brush roll 61B are arranged so that the positions of the brush roll 61A and the brush roll 61B coincide with each other in the length direction L and the width direction W.
- the brush rolls 61A and 61B are removed by scraping off the surface coating by rotationally driving while the outer peripheral surfaces of the brush rolls 61A and 61B are in contact with the upper and lower surfaces of the steel plate S.
- the brush rolls 61A and 61B have a form in which a plurality of wires are planted on the outer periphery of the roll-shaped member.
- the rotational drive of the brush rolls 61A and 61B is driven by the power of the drive source (motor).
- the specific means of the abrasive for removing the coating is arbitrary, and instead of the brush rolls 61A and 61B, for example, a grinding wheel in which hard abrasive grains are accumulated on the outer peripheral surface. An elastic tool or the like using a hard non-woven fabric is applied.
- the brush roll 61A arranged above the moving path P2 is supported by the hydraulic cylinder 65A and moves up and down with respect to the moving path P2.
- the piston rod of the hydraulic cylinder 65A is connected to the support bracket 64A that supports the brush roll 61A.
- the brush roll 61B arranged below the moving path P2 is supported by the hydraulic cylinder 65B, and can move up and down with respect to the moving path P2 in the same manner as the brush roll 61A.
- the piston rod of the hydraulic cylinder 65B is connected to the support bracket 64B that supports the brush roll 61B.
- the elevating relationship described here also applies to the electrode rings 21A and 21B of the welded portion 20 and the reduction rolls 31A and 31B of the compression lower portion 30, which will be described later.
- the brush rolls 61A and 61B are intended to remove a region at a predetermined distance from the rear end BE of the leading steel plate S1, and at a predetermined distance from the tip FE of the trailing steel plate S2.
- the area to be removed is targeted for removal.
- Both the leading steel plate S1 and the trailing steel plate S2 are cut by the cutting portion 90 so that the cut surface is located in the target region for film removal. As a result, the rear end side of the leading steel plate S1 and the front end side of the trailing steel plate S2 are removed.
- the presser rolls 62A and 62B corresponding to the brush rolls 61A and 61B are provided.
- the presser rolls 62A and 62B move in the length direction L with respect to the steel sheet S, and the brush rolls 61A and 61B pressurize the portion adjacent to the portion where the surface coating is to be removed by grinding from the vertical direction, thereby temporarily forming the steel sheet S. Even if the relevant part is deformed due to undulation, it can be flattened when the film is removed.
- the pressing rolls 62A and 62B are fixed at predetermined positions in the length direction L on the moving frame 10. Therefore, the pressing rolls 62A and 62B rotate at a peripheral speed equivalent to the speed at which the moving frame 10 moves in the length direction L on the steel plate S in contact with the brush rolls 61A and 61B when the surface coating is removed. Move while.
- the presser rolls 62A and 62B are arranged in the width direction W, which is the direction of the spindles 63A and 63B, with a slight gap from the brush rolls 61A and 61B. More specifically, the brush roll 61A. 61B and presser roll 62A.
- the outer ends E1 and E2 in contact with the respective steel plates S of 62B are arranged side by side in the directions of the spindles 63A and 63B.
- the brush rolls 61A and 61B use the brush rolls 61A and 61B to surface the steel plate S from the surface.
- the coating can be removed more sufficiently and stably. Therefore, the presser roll 62A and the brush roll 61A are arranged close to each other in the width direction W, and similarly, the presser roll 62B and the brush roll 61B are arranged close to each other in the width direction W.
- the pressing rolls 62A and 62B are provided inside the brush rolls 61A and 61B in the width direction W in the moving frame 10.
- the "inside" in the width direction W refers to the trailing steel plate S2 side for the presser rolls 62A and 62B corresponding to the leading steel plate S1, and refers to the leading steel plate S1 side for the presser rolls 62A and 62B corresponding to the trailing steel plate S2. ..
- the presser rolls 62A and 62B are provided inside the width direction W, especially when the tip of the trailing steel plate S2 or the rear end of the leading steel plate S1 undulates in the width direction W, so that the tip or the rear end side of the steel plate S is closer to the steel plate.
- the deformation of the steel sheet S becomes large, so that the deformation of the steel sheet S can be more sufficiently flattened by pressurizing the end side of the steel sheet S more than the brush rolls 61A and 61B.
- the pressing rolls 62A and 62B have a smaller diameter than the brush rolls 61A and 61B. This is because when the surface coating is removed, the tips of the brush rolls 61A and 61B bend and come into contact with the steel plate S, so that the repulsive force of the wires on the outer circumference of the brush rolls 61A and 61B can be used more reliably. This is because the film can be removed.
- the difference between the diameters of the brush rolls 61A and 61B and the diameters of the presser rolls 62A and 62B is, for example, several mm. Even if the diameters of the presser rolls 62A and 62B are smaller than the diameters of the brush rolls 61A and 61B, for example, as will be described later with reference to FIG. 5, the steel plate S is pressed between the presser rolls 62A and 62B to form a steel plate. The surface coatings on both sides of the steel sheet S can be stably removed by the brush rolls 61A and 61B while flattening the S.
- the materials of the presser rolls 62A and 62B are arbitrary as long as the purpose can be achieved, and are selected from metal materials, ceramic materials, resin materials and the like. Further, although the presser rolls 62A and 62B can be configured as a single unit, they can also be configured by combining a plurality of members.
- the holding rolls 62A and 62B can be formed by fitting an annular member around the disk-shaped member. In this case, the disc-shaped member and the annular member can be made of different materials.
- the film removing unit 60 has the following configuration for rotationally driving the brush rolls 61A and 61B.
- the following configuration is just an example, and the brush rolls 61A and 61B can be rotationally driven by other configurations.
- the coating removing portion 60 includes motors 66A and 66B which are drive sources for brush rolls 61A and 61B, first pulleys 68A and 68B fixed to output shafts 67A and 67B of the motors 66A and 66B, and first pulleys 68A and 68B.
- the second pulleys 69A and 69B corresponding to 68B are provided.
- the first conduction belts 73A and 73B are hung around the first pulleys 68A and 68B and the second pulleys 69A and 69B, and the rotational driving force of the output shafts 67A and 67B is from the first pulleys 68A and 68B to the second pulley 69A. , 69B is transmitted.
- the coating removing portion 60 includes rotating shafts 75A and 75B to which the second pulleys 69A and 69B are fixed, and third pulleys 71A and 75B fixed to the rotating shafts 75A and 75B outside the width direction W of the second pulleys 69A and 69B.
- the 71B and the fourth pulleys 72A and 72B corresponding to the third pulleys 71A and 71B are provided.
- the second conduction belts 74A and 74B are hung around the third pulleys 71A and 71B and the fourth pulleys 72A and 72B, and the fourth pulleys 72A and 72B are fixed to the spindles 63A and 63B. Therefore, the rotational driving force transmitted to the second pulleys 69A and 69B is transmitted to the brush rolls 61A and 61B via the spindles 63A and 63B.
- the coating removing portion 60 can supply cooling water for cooling and lubricating the ground portion.
- waterproof covers 76A and 76B can be provided in order to prevent the cooling water from scattering to the surroundings. Since the waterproof covers 76A and 76B are divided into upper and lower parts, the waterproof curtains 77A and 77B are provided between the waterproof cover 76A and the waterproof cover 76B to more effectively prevent the cooling water from scattering to the surroundings. be able to.
- the brush rolls 61A and 61B and the pressing rolls 62A and 62B do not remove the surface film, they are in a standby position away from the steel plate S as shown in FIG. 4A to remove the surface film.
- the work position is moved to the working position in contact with the steel plate S. Since the brush rolls 61A and 61B move up and down while moving relative to the steel plate S, the tip portion of the brush roll has a movement locus as shown in FIG. 4C.
- the relative movements shown in FIG. 4 (c) are movements in both the horizontal direction h and the vertical direction v.
- the brush rolls 61A and 61B are rotationally driven by using the motors 66A and 66B as drive sources. Assuming that the steel plate S moves in the direction DS of FIG. 4B relative to the moving frame 10 moved in the length direction L, the brush rolls 61A and 61B rotate in the direction D61. As described above, the presser rolls 62A and 62B are attached to the spindles 63A and 63B so as to idle. Therefore, at the working position, the pressing rolls 62A and 62B rotate in the direction D62 following the moving direction DS of the steel plate S while pressing the steel plate S.
- FIG. 5A shows a state in which the steel plate S is about to enter between the pressing rolls 62A and 62B.
- the end of the steel plate S is undulating and deformed.
- the pressing rolls 62A and 62B pressurize, so that the portion between the pressing rolls 62A and 62B and its vicinity become a flat FL.
- the deformed steel plate S has a flat FL portion until the moving frame 10 is further sent to the steel plate S and the steel plate S passes between the pressing rolls 62A and 62B. It continuously moves to the rear end BE of the steel plate S.
- the position relative to the brush rolls 61A and 61B Becomes constant. That is, the brush rolls 61A and 61B and the steel plate S are positioned by the pressing rolls 62A and 62B. Therefore, the surface coating can be stably removed by the brush rolls 61A and 61B. As a result, the brush rolls 61A and 61B can come into contact with the steel plate S with an even force, so that the surface coating can be stably removed.
- the surface coating where the brush rolls 61A and 61B are in strong contact is easily removed, but the surface coating where the brush rolls 61A and 61B are in strong contact is easily removed.
- the degree of removal of the surface coating is not stable, such as insufficient removal.
- the cut portion 90 cuts and removes the predetermined region of the preceding steel plate S1 and the trailing steel plate S2 whose surface coating has been removed by the coating removing portion 60.
- the cutting portion 90 includes a pair of upper and lower shear blades 91A and 91B, each of which moves up and down by a drive source (not shown).
- a pair of upper and lower shear blades 91A and 91B are provided side by side at intervals in the direction of the transport path P1. ..
- the shear blades 91A and 91B provided on the upstream side ⁇ of the transport path P1 target the leading steel plate S1 for cutting
- 91B targets the trailing steel plate S2 for cutting.
- the shear blade 91A and the shear blade 91B are arranged so as to face each other above and below the height direction H with the movement path P2 in between.
- the shear blade 91A and the shear blade 91A are arranged so that the length directions L coincide with each other.
- the welded portion 20 has a pair of upper and lower electrode rings 21A and 21B and support rods 22A and 22B that rotatably support the electrode rings 21A and 21B, respectively. And.
- the electrode ring 21A and the electrode ring 21B are arranged so as to face each other in the vertical direction H above and below the moving path P2.
- the electrode ring 21A and the electrode ring 21B are arranged so that the positions of the electrode ring 21A and the electrode ring 21B coincide with each other in the length direction L and the width direction W.
- the electrode ring 21A arranged above the moving path P2 is supported by the hydraulic cylinder 23 and moves up and down with respect to the moving path P2.
- the support rod 22A that supports the electrode ring 21A constitutes a piston rod that is connected to the piston 24 of the hydraulic cylinder 23.
- the electrode ring 21A is lowered to bring the electrode ring 21A and the electrode ring 21B into contact with the steel plate S with appropriate pressure.
- the electrode ring 21B arranged below the movement path P2 is supported by a support rod 22B fixed to the support base 12B.
- the compression lower portion 30 is provided adjacent to the front (F) side of the welded portion 20, and reduces the welded portion of the steel plate S welded by the welded portion 20. Flatten. The plastic working performed here is called swaging.
- the compression lower portion 30 has support rods 32A and 32B that rotatably support the pair of reduction rolls 31A and 31B and the reduction rolls 31A and 31B, respectively. And.
- the welded portion is shown in black.
- the reduction roll 31A and the reduction roll 31B are arranged so as to face each other above and below the height direction H with the movement path P2 interposed therebetween.
- the reduction roll 31A and the reduction roll 31B are arranged so that the positions of the reduction roll 31A and the reduction roll 31B coincide with each other in the length direction L and the width direction W.
- the reduction roll 31A arranged above the moving path P2 is supported by the hydraulic cylinder 33 and moves up and down with respect to the moving path P2.
- the support rod 32A that supports the reduction roll 31A constitutes a piston rod that is connected to the piston 34 of the hydraulic cylinder 33.
- the reduction roll 31A and the reduction roll 31B apply an appropriate pressure to the welded portion of the steel plate S by lowering the reduction roll 31A.
- the reduction roll 31B arranged below the movement path P2 is supported by a support rod 32B fixed to the support base 12B.
- the reduction roll 31B may move up and down with respect to the moving path P2 by the expansion and contraction operation of the support rod 32B.
- the surface temperature of the portion rolled by the welded portion 20 becomes, for example, a temperature exceeding 1300 ° C., but the temperature of the portion is lowered to, for example, 900 ° C. or less due to contact with the pressure lower portion 30, and then the temperature is increased by reheating. ..
- the cooling unit 40 supplies the cooling water CW from the watering nozzle 41 toward both the upper surface and the lower surface of the welded portion flattened by the compression lower portion 30.
- This cooling water CW is preferably supplied as granules.
- As the granules there are mist-like particles having a small particle size and shower-like particles having a larger particle size than mistakes and shapes, but mist-like cooling water is preferable.
- the reason is as follows. That is, the amount of water used is reduced by making the cooling water mist. This is because the water treatment equipment can be made small and simple, and the amount of water is reduced, so that the amount of cooling water reaching the compression lower portion 30 is also reduced.
- the cooling unit 40 is provided above and below the moving path P2, but this is only an example, and as long as sufficient cooling capacity can be obtained, it is only above or below the moving path P2. It can also be provided only on.
- One or three or more cooling units 40 may be provided along the movement path P2.
- an example of cooling water CW is shown here as a cooling medium, another cooling medium such as air can be used as long as sufficient cooling ability can be obtained.
- Heating unit 50 Next, the heating unit 50 will be described. As shown in FIGS. 1 and 7B, the heating unit 50 heats the welded portion hardened by the supply of cooling water from the cooling unit 40 by the heater 51 and tempers it.
- the mechanism by which the heating portion 50 heats the welded portion does not matter.
- a heater using a heating wire, a heater using a flame, a heater using IH (Induction Heating), and the like are applied.
- the IH heater applies an electromagnetic field generated from the electromagnetic coil to the welded portion of the steel plate S to allow an induced eddy current to flow through the welded portion. Since the steel plate S has an electrical resistance, the welded portion generates heat due to the flowing current.
- the IH heater is used as the heating unit 50, it is easy to realize rapid heating of the steel plate S. The details of tempering will be described later.
- the steel sheet S passes through the heating unit 50, the steel sheet S is air-cooled to room temperature by the ambient air.
- the leading steel sheet S1 and the trailing steel sheet S2 connected at the welded portion are used as an integral steel sheet S, for example, in the next rolling.
- the heating portion 50 is provided only below the steel plate S, but it can also be provided both above and below the steel plate S.
- FIG. 8 shows a process in which the joining device 1 moves on the outward path
- FIG. 9 shows a process in which the joining device 1 moves on the return path.
- each of the leading steel plate S1 and the trailing steel plate S2 is conveyed to a predetermined position. Then, as shown in FIG. 6A, the leading steel plate S1 and the trailing steel plate S2 are sandwiched by the clamps 79 and 79, respectively, and are more than the height position of the steel plate S when being transported along the transport path P1. The position is fixed while being pushed down by 10 mm.
- the joining device 1 starts moving on the outward route. On the outward route, the welded portion 20 and the pressed lower portion 30 are separated so as not to come into contact with the leading steel plate S1 and the trailing steel plate S2. Further, the supply of the cooling water from the cooling unit 40 is stopped, and the heating unit 50 is not yet in the heated state.
- the film removing portion 60 reaches the steel plate S (leading steel plate S1, trailing steel plate S2) as shown in FIGS. 6 (a) and 8 (b). Further, since it passes through the steel sheet S, the surface coating of the steel sheet S is removed.
- the pressing rolls 62A and 62B pressurize the tip of the steel sheet S from the front and back, so that the tip is tentatively undulated. Even if it is deformed by such means, the deformation is corrected at least during pressurization so that the relative positions of the brush rolls 61A and 61B and the steel plate S are kept constant between the pressing rolls 62A and 62B and in the vicinity thereof.
- the cut portion 90 reaches the steel plate S (leading steel plate S1, trailing steel plate S2) as shown in FIGS. 6 (b) and 8 (c). ..
- the shear blade 91A is lowered and the shear blade 91B is raised to cut each of the leading steel plate S1 and the trailing steel plate S2.
- the joining device 1 moves on the return route next.
- the welded portion 20 and the pressed lower portion 30 are prepared to come into contact with the leading steel plate S1 and the trailing steel plate S2, and cooling water is sprayed from the cooling portion 40.
- the steel plate S exits the cut portion 90 and then passes through the welded portion 20 and the compression lower portion 30 in order as shown in FIG. 9A.
- the leading steel plate S1 and the trailing steel plate S2 are welded as shown in FIG. 6 (c) by passing through the welded portion 20.
- the compression lower portion 30 the welded portion is flattened to a wall thickness approximately the same as that of the other portions as shown in FIG. 6 (d).
- the welded portion crushed by the compression lower portion 30 is rapidly cooled because the cooling water CW supplied as a mist adheres when it reaches the cooling portion 40.
- the welded portion is hardened by this quenching.
- the steel plate S is heated to a predetermined temperature in the process of passing over the heating portion 50, so that the hardened welded portion is removed. It is tempered.
- the joining device 1 further advances the movement of the return path, the joining device 1 returns to the retracted position as shown in FIG. 9D, and a series of procedures for welding the leading steel plate S1 and the trailing steel plate S2 is completed. Then, the steel plate S in which the leading steel plate S1 and the trailing steel plate S2 are connected is conveyed to the next process.
- the joining device 1 According to the joining device 1, it is difficult to eliminate even if only a soft abrasive such as brush rolls 61A and 61B is pressed against the steel sheet S, and even if deformation such as waviness exists on the steel sheet S, the surface coating By pressurizing the steel plate S from the front and back with the pressing rolls 62A and 62B at the time of removing Can be kept constant. As a result, the reaction force from the steel sheet S applied to the brush rolls 61A and 61B becomes uniform, so that the surface coating can be stably removed from the steel sheet S.
- a soft abrasive such as brush rolls 61A and 61B
- the joining device 1 uses pressing rolls 62A and 62B which are rotating bodies to press the steel plate S from the front and back, and since the rotating bodies are supported by the spindles 63A and 63B so as to be idling, they come into contact with each other. It rotates following the movement of the steel plate S. Therefore, it is possible to reduce the load received by the pressing rolls 62A and 62B from the steel plate S as the steel plate S moves. Further, since a drive source for rotating the presser rolls 62A and 62B is not required, the space occupied by the joining device 1 can be reduced and the cost can be reduced.
- the brush rolls 61A and 61B and the pressing rolls 62A and 62B are arranged coaxially with the spindles 63A and 63B. Therefore, since the brush rolls 61A and 61B and the presser rolls 62A and 62B can be raised and lowered by one hydraulic cylinder 65A and 65B, respectively, the space occupied by the joining device 1 can be reduced and the cost can be reduced.
- the brush rolls 61A and 61B move the steel sheet S in a direction orthogonal to the direction of the transport path P1 (FIG. 1) of the steel sheet S while the brush rolls 61A and 61B rotate, so that the width of the steel sheet S is from one end to the other end.
- the corresponding presser rolls 62A and 62B are the main shafts 63A and 63B that are the rotation axes of the brush rolls 61A and 61B. They are arranged side by side in a state close to the direction (width direction W).
- a pair of grinding rolls installed on the front and back of the steel plate S along a direction (length direction L) orthogonal to the directions of the spindles 63A and 63B are provided on the spindle 63A.
- the film removing portion is due to the axial length of the grinding roll over the entire width of the steel plate S.
- the longer the axial length of the grinding roll the more easily the degree of grinding varies in the axial direction of the grinding roll.
- the film removing portion becomes larger in the transport direction of the steel plate S, and the pressure roll
- the degree of pressurization tends to vary in the axial direction.
- the corresponding presser rolls 62A and 62B are arranged in the direction of the spindles 63A and 63B (width direction W) with respect to the brush rolls 61A and 61B that grind while rotating across the steel plate S.
- the thin brush rolls 61A and 61B corresponding to the width of the removal range of the surface coating on the steel plate S and the equally thin pressing rolls 62A and 62B can be adopted, and the brush rolls 61A can be adopted.
- , 61B and the presser rolls 62A, 62B can be arranged close to the direction of the spindle 63A (width direction W). Therefore, as compared with the above comparative example, the brush rolls 61A and 62A and the presser roll 62A are uniformly reduced over the entire width of the steel sheet S while reducing the space occupied by the film removing portion 60 in both the length direction L and the width direction W. , 62B can be brought into contact with each other while the surface coating can be stably removed from the steel sheet S.
- the positions of the presser roll 62A and the presser roll 62B can be shifted in the moving direction DS (length direction L) of the steel plate S. Moreover, when the film is removed, the height of the lowest point of the presser roll 62A located on the upper side is set to be equal to or lower than the height of the highest point of the presser roll 62B located on the lower side.
- the pressing position of the pressing roll 62A on the front side of the steel plate S exceeds the height position PL of the steel plate S (below the upper surface US of the steel plate S), and the pressing position of the pressing roll 62B on the back side of the steel plate S is the steel plate. It is arranged beyond the height position PL of S (above the lower surface LS of the steel plate S).
- the upper surface US and the lower surface LS are assumed to be the upper surface and the lower surface of the steel plate S when the flat steel plate S is conveyed through the transport path P1 and is sandwiched and fixed by the clamp 79.
- the reduction position is defined at the lower end of the presser roll 62A and at the upper end of the presser roll 62B. As shown in FIG. 10, it is assumed that the brush rolls 61A and 61B are arranged coaxially with the presser rolls 62A and 62B.
- the ability to remove the surface coating against deformation can be improved as described below.
- the steel plate S passes between the pressing rolls 62A and 62B arranged as described above, as shown in FIG. 10, the steel plate S has a curved range in contact with each of the pressing roll 62A and the pressing roll 62B. Therefore, the contact area between the brush rolls 61A and 61B and the steel plate S is increased as compared with the above-described embodiment in which the flat FL is used, so that the ability to remove the surface coating is improved.
- the presser roll 62A and the presser roll 62B are set so that the height of the lowest point of the upper presser roll 62A is equal to or less than the height of the uppermost point of the lower presser roll 62B when the coating film is removed.
- the brush rolls 61A and 61B and the clamps 79 and 79 are arranged so as to be displaced (shifted) in the moving direction DS (length direction L), as shown in FIGS. 11A to 11C. Even when the steel plate S is undulated and deformed between them, the brush rolls 61A and 61B can be sufficiently pressed against the steel plate S for grinding.
- the degree to which the surface coating can be removed is determined by the size of the vertical dimension in which the steel plate S and the brush rolls 61A and 61B overlap. This is because the larger the overlapping vertical dimensions are, the stronger the wires and the like provided on the brush rolls 61A and 61B are pressed against the steel plate S to perform grinding. That is, in FIG. 11A, the size of the steel plate S overlapping with the lower brush roll 61B is small, so that the removal of the surface coating on this portion may be insufficient.
- FIG. 11 shows only the tip portions of the brush rolls 61A and 61B and the presser rolls 62A and 62B in the AA cross section, the BB cross section and the CC cross section of FIG. Further, FIG. 11 shows an example in which the steel plate S has an upwardly convex swell, but when the steel plate S has a downwardly convex swell, the vertical direction is reversed from that shown in FIG. Shows behavior. Further, in FIGS. 11 (a) to 11 (c), two broken lines extending in the lateral direction in the figure indicate the height position PL (FIG. 10), respectively.
- the position of the steel plate S is moved to the upper side (FIG. 11 (a)) or lower with the height position PL, which is the reference height of the steel plate S fixed by the clamp 79, as the center.
- the height position PL indicates the center of the arranged steel sheet S in the thickness direction and exists over the length direction L. Specifically, as shown in FIG. 11A, when the presser roll 62B on the back side is moved above the back surface (lower surface) of the steel plate S with respect to the position of FIG.
- the upper pressing roll 62A and the lower pressing roll 62B are arranged so that the height of the lowest point of the upper pressing roll 62A is equal to or less than the height of the lowest point of the lower pressing roll 62B when the film is removed. Is arranged so as to be shifted in the length direction L, so that the steel plate S undulates upward or downward between the clamp 79 and the pressing rolls 62A and 62B. In the region where the brush rolls 61A and 61B are in contact with the steel plate S, it becomes easy to form a portion in parallel with the steel plate S. Therefore, the surface coatings on the front and back surfaces of the steel sheet S can be removed evenly.
- First means Cutting the presser rolls 62A and 62B
- the first means is to cut the surface of the presser rolls 62A and 62B. An example thereof will be described with reference to FIG.
- a tool for cutting the tip surfaces of the presser rolls 62A and 62B for example, a cutting tool 81 called a knurl cutter or a knurl cutter is opposed to the tip surfaces of the presser rolls 62A and 62B. And provide. Normally, the cutting tool 81 is separated from the tip surfaces of the presser rolls 62A and 62B as shown in FIGS. 12A and 12B.
- the film removing device as the first means includes a sensor for detecting the amount of wear of the brush rolls 61A and 61B, for example, a photoelectric sensor 83, and the cutting tool 81 based on the information obtained by the photoelectric sensor 83. Is provided with a control unit 86 (FIG. 12A) instructing the brush rolls 61A and 61B to be cut.
- the photoelectric sensor 83 includes a light emitting element 83A and a light receiving element 83B as an example. As shown in FIG.
- the light emitting element 83A and the light receiving element 83B receive light when the amount of wear of the brush rolls 61A and 61B is small because the inspection light DL from the light emitting element 83A is blocked by the brush roll 61A.
- the element 83B cannot receive the inspection light DL.
- the amount of wear of the brush rolls 61A and 61B increases, for example, when the tip surfaces of the brush rolls 61A and 61B have the same height as the tip surfaces of the pressing rolls 62A and 62B, as shown in FIG. 12B, Since the inspection light DL from the light emitting element 83A passes through the brush roll 61A, the light receiving element 83B receives the inspection light DL.
- the photoelectric sensor 83 corresponds to a wear state information acquisition unit that acquires information indicating the wear state of the brush rolls 61A and 61B.
- the information indicating that the amount of wear of the brush rolls 61A and 61B has reached the usage limit (wear state) corresponds to the inspection light DL.
- the amount of wear of the brush rolls 61A and 61B can be obtained by using a tape measure, a displacement meter using a laser, or the like.
- the amount of wear of the brush rolls 61A and 61B increases, and the amount of protrusion of the brush rolls 61A and 61B from the outer ends of the presser rolls 62A and 62B decreases accordingly, so that the torque of the output shafts 67A and 67B of the motors 66A and 66B
- the torque obtained from the motors 66A and 66B may be converted into the amount of wear of the brush rolls 61A and 61B.
- the output torque of the motors 66A and 66B as the wear state information acquisition unit corresponds to the information indicating the wear state of the brush rolls 61A and 61B.
- the inspection light DL received by the light receiving element 83B serves as a signal for starting cutting.
- the cutting tool 81 is brought into contact with the tip surface of the brush roll 61A by a drive mechanism (not shown) as shown in FIG. 12 (d). Come down and cut the tip.
- the cutting tool 81 finishes cutting a predetermined amount and is raised to the same position as before by the drive mechanism.
- the position of the photoelectric sensor 83 is lowered more than before to detect the wear of the brush roll 61A.
- a sensor for measuring the amount of wear may be provided, and cutting may be started when the measured amount of wear reaches a predetermined value.
- a mechanism that allows rotation in one direction but prevents rotation in the opposite direction for example, a ratchet, can be interposed between the presser rolls 62A and 62B and the spindles 63A and 63B.
- Cutting is performed with the cutting tool 81 while being rotationally driven by the driving force from the motors 66A and 66B in the direction in which the rotation is stopped.
- a key groove is provided between the presser rolls 62A and 62B and the spindles 63A and 63B, and when cutting the presser rolls 62A and 62B, a key is inserted into this key groove to insert the presser rolls 62A and 62B. Can stop the rotation of. When operating the joining device 1, the key is removed from the keyway.
- the cutting amount of the presser rolls 62A and 62B can be controlled as follows, for example. As shown in FIG. 12, a contact sensor 84 that moves in synchronization with the cutting tool 81 is provided, and when the contact sensor 84 comes into contact with the brush rolls 61A and 61B, cutting by the cutting tool 81 is completed.
- the presser rolls 62A and 62B are composed of a plurality of members, and a member corresponding to the outermost layer is formed according to the amount of wear of the brush rolls 61A and 61B. It's about getting rid of it.
- the pressing roll 62A (62B) is provided with a disc-shaped first member 62A1 and an annular second member 62A2 fitted on the outer circumference of the first member 62A1. It is configured so that it can be divided into.
- the second member 62A2 layer on the outer peripheral side
- the first member 62A1 inner circumference
- the presser roll 62A (62B) is formed only from the side layer).
- the presser roll 62A (62B) has a two-layer structure is shown, but a structure having three or more layers is also possible.
- the third means is to replace the presser rolls 62A and 62B with one having a smaller diameter.
- the holding roll 62A (62B) having a radius R1 was initially used, but the amount of wear of the brush roll 61A (61B) increased and reached a predetermined value. Then, the presser roll 62A (62B) having a radius R2 (R1> R2) is replaced. After that, the presser roll 62A (62B) having a smaller diameter can be replaced in the same manner according to the amount of wear.
- removing the outermost layers of the presser rolls 62A and 62B according to the amount of wear of the brush rolls 61A and 61B as shown in FIG. 13A can also be applied to the presser rolls having a small diameter shown in FIG. 13B.
- a plurality of pressing rolls 62A having different diameters are prepared, and as the amount of wear increases, the pressing rolls 62A having a smaller diameter are replaced.
- the fourth means is to change the positions of the pressing rolls 62A and 62B with respect to the steel plate S.
- the axis of the brush roll 61A (61B) and the axis of the presser roll 62A (62B) are initially arranged so as to coincide with each other (FIG. 13 (c)). left).
- the position of the rotation shaft C61 of the brush roll 61A is held down by an elevating mechanism such as a cylinder.
- the fourth means is based on the premise that the presser rolls 62A and 62B can be raised and lowered independently (relatively) to the brush rolls 61A and 61B by the hydraulic cylinder 621 and the like.
- the pressing rolls 62A and 62B are supported by a shaft C62 different from the rotating shaft C61 of the brush rolls 61A and 61B.
- the shaft C62 of the presser roll 62A is coupled to the piston of the hydraulic cylinder 621 via the bracket 622, and the shaft C62 of the presser roll 62B is also coupled to the piston of the hydraulic cylinder 621 via the bracket 622.
- the presser rolls 62A and 62B are used to correct the deformation of the steel plate S by pressurization.
- the structure of the pressurizing body in the present invention is It is optional.
- an endless track 85 installed on the front and back surfaces of the steel plate S can be used.
- Each endless track 85 is arranged between a pair of idle wheels 85A and a pair of idle wheels 85A, and has a plurality of rolling wheels 85B that rotate while pressurizing the steel plate S, and an endless shape that surrounds the floating wheels 85A and the rolling wheels 85B.
- the endless track 85C It is equipped with a track 85C.
- the axis of at least one of the plurality of rolling wheels 85B (for example, the central rolling wheel 85B in FIG. 15) and the rotation axis of the brush roll (not shown) are orthogonal to the paper surface of FIG. They are lined up.
- the endless track 85 rotates with the relative movement of the steel plate S with respect to the moving frame 10 provided with the infinite track 85 without requiring a driving force.
- the endless track 85 can expand the range in which the deformation of the steel plate S can be corrected in the moving direction of the steel plate S (the left-right direction in FIG. 15).
- the film removing portion 60-2 has an eccentric structure including an eccentric shaft 102 eccentric with respect to the brush rolls 61A and 61B.
- the diameters of the pressing rolls 62A and 62B are reduced according to the amount of wear of the brush rolls 61A and 61B. It is possible to obtain a stable grinding force on the brush rolls 61A and 61B without doing so.
- the film removing section 60-2 can be adopted in the joining device 1 (FIG. 1) in place of the film removing section 60 of the first embodiment. In that case, the film removing portion 60-2 is installed on the support 100 provided on the moving frame 10 (FIG. 1).
- the film removing section 60-2 of the second embodiment also has a pair of brush rolls 61A and 61B for removing the surface coatings on the front and back surfaces of the steel sheet S, as is the case with the film removing section 60 of the first embodiment shown in FIG. And a pair of pressing rolls 62A and 62B that pressurize the steel plate S while moving with respect to the steel plate S while sandwiching the steel plate S from the front and back.
- the film removing section 60-2 simultaneously removes the film from the rear end portion of the leading steel sheet S1 (FIG. 2) and the tip portion of the trailing steel sheet S2 (FIG. 2). Therefore, two sets of brush rolls 61A and 61B are provided, and two sets of presser rolls 62A and 62B are also provided.
- the film removing section 60-2 of the second embodiment differs from the film removing section 60 of the first embodiment will be mainly described.
- the same reference numerals are given to the components corresponding to the first embodiment.
- Various modifications (for example, FIGS. 10 and 11) of the above-described first embodiment can be applied to the film removing portion 60-2.
- the film removing portion 60-2 is eccentric with respect to the brush roll 61A, the pressing roll 62A, and the main shaft 63A (rotating shaft) of the brush roll 61A, and is fixed to the support 100. It is provided with an eccentric shaft 102 rotatably supported by a fixed boss 101 as a fixed shaft, and an angle adjusting mechanism 103 capable of adjusting the eccentric shaft 102 to a predetermined rotation angle.
- the brush roll 61A is a rotating body having a disc 104 on which a large number of densely packed wires (FIG. 17) are provided on the outer peripheral portion and a spindle 63A to which the disc 104 is fixed.
- a rotational driving force is transmitted from a motor (not shown) to the spindle 63A via a belt and a pulley (not shown)
- the disc 104 integrated with the spindle 63A also rotates around the spindle 63A.
- the material, density, length, etc. of the wire rod are appropriately set so as to satisfy the rigidity required for removing the coating film from the steel plate S.
- the material of the wire is, for example, a resin such as nylon or a metal such as steel, and can be appropriately selected depending on the coating removal target (bonding target) such as the steel plate S.
- the wire rod may contain abrasive grains.
- the length from the base end to the tip of the wire rod is referred to as “wire rod length”, and the wire rod length in the initial state without wear is referred to as “initial wire rod length”.
- the presser roll 62A is rotatably supported about the axis X1 of the eccentric shaft 102 by the fixed boss 101 via the eccentric shaft 102.
- the eccentric shaft 102 (bush) is eccentric with respect to the axis X0 of the spindle 63A and the fixed boss 101 by a predetermined eccentric amount y e .
- the brush roll 61A, the pressing roll 62A, and the eccentric shaft 102 are supported in a state where the main shaft 63A is arranged inside the fixed boss 101 and the eccentric shaft 102 and the disk-shaped pressing roll 62A are arranged outside the fixed boss 101. It is integrally assembled to the body 100. As shown in FIG. 16, the disc 104 of the brush roll 61A, the presser roll 62A, and the support 100 are adjacent to each other in the direction of the spindle 63A. It is the same as the first embodiment (FIG. 2) that the outer ends E1 and E2 in contact with the respective steel plates S of the brush roll 61A and the pressing roll 62A are arranged side by side in the direction of the spindle 63A.
- the lower brush roll 61B and the presser roll 62B provided in the film removing portion 60-2 can be configured in the same manner as the upper structure.
- the coating removing portion 60-2 includes a plurality of bearings B1 to B3 interposed between the main shaft 63A, the fixed boss 101, the eccentric shaft 102, and the pressing rolls 62A and 62B, respectively. Therefore, the brush roll 61A having the main shaft 63A, the eccentric shaft 102, and the pressing roll 62A are separated from each other. Specifically, a first bearing B1, which is a ball bearing, is arranged between the spindle 63A and the fixed boss 101. A second bearing B2, which is a slide bearing, is arranged between the fixed boss 101 and the eccentric shaft 102. A third bearing B3, which is a ball bearing, is arranged between the eccentric shaft 102 and the presser roll 62A. It should be noted that appropriate bearings can be adopted for the first to third bearings B1 to B3 in consideration of load requirements and the like.
- the eccentric shaft 102 can rotate with respect to the fixed boss 101 about the eccentric axis X1, and the pressing rolls 62A and 62B can rotate around the eccentric shaft 102.
- the angle adjusting mechanism 103 includes, for example, a transmission mechanism 107 capable of transmitting a rotational driving force to the eccentric shaft 102, and a brake mechanism 108 capable of regulating the operation of the transmission mechanism 107.
- the transmission mechanism 107 includes, by way of example, a sprocket, a chain, and a handle attached to the sprocket.
- the brake mechanism 108 includes, for example, a claw that can be engaged with and detached from the sprocket.
- the transmission mechanism 107 may include a motor instead of the handle.
- the angle adjusting mechanism 103 can adopt an appropriate configuration in which the eccentric shaft 102 can be rotated to adjust to a predetermined rotation angle.
- the eccentric shaft 102 rotates around the axis X0.
- the brake mechanism 108 is operated after rotating the eccentric shaft 102 to a predetermined rotation angle, the rotation of the eccentric shaft 102 is restricted.
- the eccentric shaft 102 When the eccentric shaft 102 is adjusted to a predetermined rotation angle, as shown in FIG. 18, the angular phase of the presser roll 62A with respect to the brush roll 61A is changed, and the brush rolls from the presser rolls 62A and 62B at the points where they come into contact with the steel plate S.
- the protrusion amount y of 61A and 61B can be freely adjusted. As shown in FIG. 20, the protrusion amount y corresponds to the distance between the outer end of the brush roll 61A and the outer end of the pressing roll 62A at the position where the brush roll 61A comes into contact with the steel plate S.
- the diameters d1 of the brush rolls 61A shown in FIGS. 18A to 18C are the same.
- the rotation angle of the eccentric axis 102 about the axis X1 is referred to as ⁇ 1, and it is assumed that ⁇ 1 is 0 ° when the protrusion amount is the minimum y 1 as shown in FIG. 18 (a). If the brush roll 61A is not worn and the diameter is constant, the protrusion amount gradually increases to y 1 , y 2 , y 3 as the rotation angle ⁇ 1 is changed from 0 ° to 180 °, and becomes 180 °. Sometimes it becomes the maximum.
- the difference from the length to the point corresponds to twice the eccentricity amount y e (eccentric radius) (2 y e ). From 180 ° to 360 ° (0 °), the amount of protrusion gradually decreases.
- the diameter of the brush roll 61A gradually decreases due to the wear of the brush roll 61A.
- the amount of protrusion y also decreases.
- the steel plate S is pressed by the presser roll 62A near the wire rod of the brush roll 61A, the steel plate S is ground by the wire rod in a bent state while being pressed against the steel plate S. Therefore, the grinding force required for removing the surface film is applied to the wire rod.
- There is an appropriate range for use in the protrusion amount y because of the necessity of ensuring the above.
- the diameters of the brush rolls 61A and 61B are reduced by wear by the methods shown in FIGS. 12 and 13, respectively, and the pressing rolls 62A and 62B are reduced. It is possible to increase the protrusion amount y by reducing the diameter of the above and return it to the protrusion amount y for obtaining the required grinding force.
- the pressing roll 62A is rotatable around the eccentric shaft 102 eccentric with respect to the spindle 63A as in the present embodiment and the eccentric shaft 102 is adjusted to a rotation angle according to the amount of wear, the amount of wear is reduced. among remain within the scope of 2y e, regardless of amount of wear can be kept constant without varying the amount of projection y. If the amount of protrusion when the 180 ° is maintained in y, the initial wire length of the brush roll 61A is at least y + 2y e.
- the brush roll 61A is started from the state where the rotation angle of the eccentric shaft 102 is 0 °, it reaches 180 ° while adjusting the rotation angle of the eccentric shaft 102 by using the angle adjusting mechanism 103 at an appropriate frequency.
- the same brush roll 61A can be used continuously until the brush roll 61A is used. During that time, by keeping the protrusion amount y at a value equal to or higher than a certain value, a stable grinding force can be obtained on the brush roll 61A. If the brush roll 61A is used continuously while the rotation angle is maintained at 180 °, the protrusion amount y decreases.
- the same brush roll 61A can be continued to be used until the protrusion amount y reaches the use limit and the required cutting force cannot be obtained.
- the protrusion amount y reaches the usage limit, the life of the wire rod expires, so that the brush roll 61A needs to be replaced.
- the protrusion amount y does not change even if the wire rod of the brush roll 61A is worn by adjusting the rotation angle of the eccentric shaft 102, unlike the case where the protrusion amount y decreases due to wear, even when the protrusion amount y is the minimum.
- a wire rod having a long initial length can be used for the brush roll 61A. Then, as the wear progresses, the wire length becomes shorter, and even when the eccentric shaft 102 is rotated up to 180 °, the required grinding force cannot be obtained, and the amount of wear up to the usage limit can be increased. Depending on the life, the period of use of the brush roll 61A until it is replaced can be extended.
- FIG. 21 when the brush roll 61A and the presser roll 62A rotate about the same spindle 63A (# 1), the presser roll 62A rotates in an eccentric state with respect to the brush roll 61A as in the present embodiment.
- An operation example of the film removing portion in each of the cases (# 2) is shown.
- # 2 a brush roll 61A having an initial wire length longer than that of # 1 is adopted.
- # 1 a brush roll 61A having an initial wire length of 20 mm is used as an example, and in # 2, a brush roll 61A having an initial wire length of 25 mm is used as an example.
- the brush roll 61A and the presser roll 62A will be described as an example, but the same applies to the brush roll 61B and the presser roll 62B.
- the protrusion amount y when the use of the brush roll 61A is started from the protrusion amount y01, the protrusion amount y also decreases as the wire rod length decreases due to wear.
- the amount of protrusion y is reduced to the limit of use, the amount of protrusion is returned to y by reducing the diameter of the presser roll 62A by the various methods described above (see the broken line), and the use of the brush roll 61A is resumed. After that, when the protrusion amount y decreases to the usage limit due to wear, the life of the wire rod is exhausted, so the brush roll 61A is replaced.
- FIG. 22 shows an operation example of three brush rolls 61A for each of the above cases # 1 and # 2. It is assumed that the usage conditions such as the number of film removal treatments per day are the same for both # 1 and # 2. Further, the three brush rolls are given the symbols a, b, and c, respectively.
- # 1 shown in the upper row the brush roll 61A of a is started to be used, and when the protrusion amount y reaches the usage limit due to wear, the brush roll 61A is replaced from a to b.
- a surface-facing operation is performed in which the tip of the wire rod group is flattened to make it easier to hit the steel plate S.
- the protrusion amount y of b When the protrusion amount y of b reaches the usage limit, it is further replaced with c. As for c, when the protrusion amount y reaches the usage limit, the second use of a is resumed with step St0 of replacement with the holding roll 62A having a smaller diameter. After that, in the same manner as described above, as the protrusion amount y reaches the usage limit, the film removal treatment is performed while sequentially exchanging with b and c. Here, it is necessary to obtain a new brush roll 61A because the life of all the wires a to c has expired due to the wear caused by the second use.
- the film removing unit 60-2 uses the wear amount acquisition unit 112 for acquiring information indicating the wear amount of the brush roll 61A and the wear amount acquisition unit 112 as additional components according to the wear amount. It is preferable to include an angle acquisition unit 113 for acquiring the rotation angle ⁇ 1 of the eccentric shaft 102.
- the wear amount acquisition unit 112 corresponds to, for example, a displacement meter using a laser.
- the wear amount acquisition unit 112 may be the photoelectric sensor 83 shown in FIG. 12, or the motor 66A that drives the brush roll 61A. When the motor 66A is used, the torque acquired from the motor 66A can be converted into the amount of wear of the brush roll 61A.
- the angle acquisition unit 113 acquires the rotation angle ⁇ 1 according to the amount of wear of the brush roll 61A by calculation or the like. For example, as shown in FIG. 24, the rotation angle ⁇ 1 of the eccentric shaft 102 and the height of the outer end E2 of the pressing roll 62A having a predetermined diameter at the position where the outer end E1 of the brush roll 61A contacts the steel plate S. There is a predetermined relationship between them.
- the height of the outer end E2 referred to here is based on the position of the outer end E2 when ⁇ 1 is 0 °, in the normal direction from this reference position (0), and toward the side away from the steel plate S (pressing roll 62A). In the example of, it corresponds to the height when measured (upward).
- the angle acquisition unit 113 can be used with the information stored in the storage unit.
- the rotation angle ⁇ 1 that gives a constant distance (protrusion amount y) between the outer ends E1 and E2 can be calculated based on the wear amount indicated by the information obtained by the wear amount acquisition unit 112.
- the rotational operation of the eccentric shaft 102 can be performed by using the angle adjusting mechanism 103 described above, or can also be performed through the eccentric shaft rotating device 115 controlled by the eccentric shaft control device 114 as shown in FIG. 23.
- the eccentric shaft rotating device 115 includes a motor provided on a sprocket or the like connected to the eccentric shaft 102, an electromagnetic brake or the like.
- the eccentric shaft control device 114 gives a control command indicating the rotation angle ⁇ 1 obtained by the wear amount acquisition unit 112 to the eccentric shaft rotation device 115. According to the control command, the eccentric shaft rotating device 115 releases the electromagnetic brake, drives the eccentric shaft 102 to rotate at a rotation angle ⁇ 1 , and then operates the electromagnetic brake to regulate the rotation of the eccentric shaft 102.
- the control device 1A for example, if the number of times of grinding by the film removing unit 60-2 reaches a specified number of times, or if the grinding distance reaches a specified km (Yes in St2), for example, Information indicating the amount of wear of the brush roll 61A is acquired using the wear amount acquisition unit 112 of a laser displacement meter or the like, or a tape measure or the like (St3). If the wear amount indicated by the information has reached the specified value (Yes in St4), the angle acquisition unit 113 determines the wear amount, the diameters of the brush roll 61A and the presser roll 62A, and the eccentricity y e .
- the rotation angle ⁇ 1 is derived by arithmetic processing using the protrusion amount y (St5).
- the eccentric shaft control device 114 issues a control command to the eccentric shaft rotating device 115 to open the brake (St6), rotate the eccentric shaft (St7), and close the brake (St8).
- the rotation angle of the eccentric shaft 102 is adjusted when the film removing process by the film removing unit 60-2 is not performed.
- the rotation angle of the eccentric shaft 102 may be adjusted by manually rotating the handle using the scale attached to the handle of the angle adjusting mechanism 103.
- the presser rolls 62A and 62B are replaced to reduce the diameter of the presser rolls 62A and 62B.
- the eccentric shaft 102 By rotating the eccentric shaft 102 at a rotation angle ⁇ 1 according to the amount of wear without performing the above work, the surface coating of the steel sheet S can be removed with a stable grinding force while maintaining a constant protrusion amount y. It can be carried out.
- the control of the protrusion amount y that follows the wear amount of the brush rolls 61A and 61B is realized by the structure in which the presser roll 62A is eccentric with respect to the spindle 63A.
- the joining device 1 for performing mash seam welding has been described as an example, but the joining method to which the present invention is applied is not limited to this. It can be widely applied to a joining method in which a surface coating needs to be removed when the ends of a pair of steel plates S and other metal plates are overlapped and joined. As a specific example, Friction Stir Welding (FSW) is applicable.
- FSW Friction Stir Welding
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
Abstract
Description
本発明における被膜除去部は、第1接合対象と第2接合対象のそれぞれの表裏に形成される表面被膜を除去する一対の研削材と、研削材により表面被膜が除去される第1接合対象と第2接合対象のそれぞれを表裏から挟んで加圧する一対の加圧体と、を備える。 The present invention is a joining device for superimposing and joining the ends of a first joining target and a second joining target, and the surfaces formed on the front and back surfaces of the first joining target and the second joining target to be overlapped. A film removing portion for removing the coating film and a joining portion for joining the first joining target from which the surface coating has been removed and the end portions of the second joining target in a superposed state are provided.
The film removing portion in the present invention includes a pair of abrasives for removing surface coatings formed on the front and back surfaces of the first bonding object and the second bonding object, and a first bonding object for which the surface coating is removed by the grinding material. A pair of pressurizing bodies that pressurize each of the second joining objects by sandwiching them from the front and back are provided.
本発明の好ましい一実施形態に係る接合装置1を、図面を参照しながら説明する。
接合装置1は、接合対象である鋼板S(図1(b))が搬送される搬送路P1(図1(b))の途中に備えられ、鋼板Sと鋼板Sの端部どうしを溶接により接合する。接合装置1は、接合される鋼板Sの端部がうねるなどして変形していても被膜を安定して除去できる被膜除去部60を備えている。
以下、接合装置1の構成、動作を順に説明した後に、接合装置1が奏する効果に言及する。 [First Embodiment]
The joining
The joining
Hereinafter, the configuration and operation of the joining
接合装置1は、図1に示すように、マッシュシーム溶接(mash seam welding,JIS Z 3001)を担う溶接部20と、溶接部20で溶接された部分を加圧する圧下部30と、を備えている。この溶接部分は先行鋼板S1(図2)の後端と後行鋼板S2(図2)の先端が重ね合わされた部分を含み、溶接部分以外に比べると肉厚な段差をなしており、圧下部30はこの段差を他の部分と概ね同じ肉厚になるまで押し潰して平坦化の程度を改善する。 [Structure of Joining Device 1]
As shown in FIG. 1, the joining
さらに、接合装置1は、溶接前に接合対象である鋼板Sの表面の主に酸化スケールを除去する被膜除去部60と、被膜除去部60により酸化スケールなどの表面被膜が除去された鋼板Sの端部をせん断により切除する切断部90と、を備えている。
加えて、接合装置1は、溶接部20、圧下部30、冷却部40、加熱部50、被膜除去部60および切断部90の動作を制御する制御装置1Aを備えている。 Further, the joining
Further, the joining
In addition, the joining
移動フレーム10は、図1(a)に示すように、側面視した形状がC型の形状を有しており、側面視における一方端に高さ方向Hに沿う接続端11Aが設けられ、他方端には開口11Bが設けられる。なお、高さ方向Hは鉛直方向vと一致する。
移動フレーム10は、図1(b)に示すように、開口11Bが搬送路P1を向いて配置される。なお、移動フレーム10において、開口11Bが設けられる側を前方(F)、接続端11Aが設けられる側を後方(B)と定義する。 [Movement frame 10]
As shown in FIG. 1A, the moving
As shown in FIG. 1B, the moving
支持台12Aと支持台12Bの間に前方側から加熱部50、被膜除去部60、冷却部40、圧下部30、溶接部20および切断部90がこの順に設けられている。 The
Between the
移動フレーム10は、鋼板Sが搬送されてくると、後退位置から前進位置まで移動する。移動フレーム10が後退位置から前進位置まで移動する往路において、被膜除去部60により鋼板Sの表面被膜を除去するとともに、切断部90による鋼板Sの切断が行われる。詳しくは後述するが、この往路の動作が図8(a),(b),(c)に示されている。 The moving
When the steel plate S is conveyed, the moving
被膜除去部60は、鋼板Sの溶接が予定される部分の表面被膜を除去する。被膜除去部60は、溶接が予定される部分がうねるなどして変形していても、被膜除去時には変形を平坦にするための加圧材としての押えロール62A,62Bを備えることで、安定した表面被膜の除去を実現する。 [Film removal unit 60]
The
本明細書において「空転」は、ブラシロール61A,61Bの回転軸と押えロール62A,62Bとの間に軸受が介在していたり、あるいは図示しないクラッチ機構を採用したりすることで、押えロール62A,62Bが、ブラシロール61A,61Bの回転に追従することなく、鋼板Sを間に挟んで加圧しながら、鋼板Sとの摩擦により、移動フレーム10の長さ方向Lへの移動に伴い、鋼板S上を回転しつつ移動フレーム10と同じ方向に移動することを意味する。つまり、押えロール62A,62Bは、ブラシロール61A,61Bの回転に対して切り離されている。 As shown in FIGS. 1A, 2 and 3, the
In the present specification, "idling" refers to the
移動路P2よりも下方に配置されるブラシロール61Bは、油圧シリンダ65Bに支持されており、ブラシロール61Aと同様に、移動路P2に対して昇降することができる。ブラシロール61Bを支持する支持ブラケット64Bには、油圧シリンダ65Bのピストンロッドが連結される。なお、後述する溶接部20の電極輪21A,21Bおよび圧下部30の圧下ロール31A,31Bについても、ここで説明した昇降の関係が当てはまる。
ブラシロール61A,61Bにより表面被膜を除去する際には、ブラシロール61A,61Bを昇降させることにより、ブラシロール61Aとブラシロール61Bを鋼板Sに適切な圧力をもって接触させる。 The
The
When the surface coating is removed by the brush rolls 61A and 61B, the brush rolls 61A and 61B are moved up and down to bring the
幅方向Wの「内側」は、先行鋼板S1に対応する押えロール62A,62Bに関しては後行鋼板S2側を言い、後行鋼板S2に対応する押えロール62A,62Bに関しては先行鋼板S1側を言う。押えロール62A,62Bが幅方向Wの内側に設けられるのは、特に後行鋼板S2の先端又は先行鋼板S1の後端が幅方向Wにうねる場合に、鋼板Sの先端又は後端側ほど鋼板Sの変形が大きくなるので、ブラシロール61A,61Bよりも鋼板Sの端部側を加圧することにより、鋼板Sの変形をより十分に平坦化できるためである。
本実施形態において、押えロール62A,62Bは、ブラシロール61A,61Bよりも径が小さい。これは、表面被膜を除去する際に、ブラシロール61A,61Bの先端が撓んで鋼板Sに接触することによりブラシロール61A,61B外周のワイヤ等の反発力を利用することができ、より確実に被膜除去できるためである。ブラシロール61A,61Bの径と押えロール62A,62Bの径との差は、例えば数mmである。押えロール62A,62Bの径がブラシロール61A,61Bの径に対して小さいとしても、例えば図5を参照して後述するように、押えロール62A,62Bの間に鋼板Sを加圧することで鋼板Sの平坦化を図りながら、ブラシロール61A,61Bにより鋼板Sの両面の表面被膜を安定して除去することができる。 Further, the
The "inside" in the width direction W refers to the trailing steel plate S2 side for the presser rolls 62A and 62B corresponding to the leading steel plate S1, and refers to the leading steel plate S1 side for the presser rolls 62A and 62B corresponding to the trailing steel plate S2. .. The presser rolls 62A and 62B are provided inside the width direction W, especially when the tip of the trailing steel plate S2 or the rear end of the leading steel plate S1 undulates in the width direction W, so that the tip or the rear end side of the steel plate S is closer to the steel plate. This is because the deformation of the steel sheet S becomes large, so that the deformation of the steel sheet S can be more sufficiently flattened by pressurizing the end side of the steel sheet S more than the brush rolls 61A and 61B.
In the present embodiment, the
作業位置において、ブラシロール61A,61Bはモータ66A,66Bを駆動源として回転駆動される。長さ方向Lに移動される移動フレーム10に対して相対的に鋼板Sが図4(b)の向きDSに移動するものとすると、ブラシロール61A,61Bは向きD61に回転する。
前述したように、押えロール62A,62Bは、主軸63A,63Bに空転するように取り付けられている。したがって、作業位置において、押えロール62A,62Bは鋼板Sを加圧しつつ鋼板Sの移動の向きDSに追従して向きD62に回転する。 In the
At the working position, the brush rolls 61A and 61B are rotationally driven by using the
As described above, the presser rolls 62A and 62B are attached to the
図5(a)は、鋼板Sが押えロール62A,62Bの間に進入しようとしている様子を示している。鋼板Sは、端部がうねって変形している。ところが、押えロール62A,62Bの間に進入すると、図5(b)に示すように、押えロール62A,62Bで加圧されるので押えロール62A,62Bの間の部分およびその近傍は平坦FLになる。図5(c)に示すように、鋼板Sに対して移動フレーム10がさらに送られることで鋼板Sが押えロール62A,62Bの間を抜けるまで、変形している鋼板Sは平坦FLな部分が鋼板Sの後端BEまで連続的に移動する。 With reference to FIG. 5, the behavior of the process in which the steel plate S passes between the
FIG. 5A shows a state in which the steel plate S is about to enter between the
切断部90は、被膜除去部60により表面被膜が除去された先行鋼板S1および後行鋼板S2の、前述した所定領域を切断して取り除く。
切断部90は、図1(a)に示すように、図示を省略する駆動源によりそれぞれが昇降する上下で一対のせん断刃91A,91Bを備える。 [Cut portion 90]
The
As shown in FIG. 1A, the cutting
次に、復路で機能する溶接部20について説明する。
溶接部20は、図1(a)および図6(c)に示すように、上下で一対の電極輪21A,21Bと、電極輪21A,21Bのそれぞれを回転可能に支持する支持ロッド22A,22Bと、を備える。
電極輪21Aと電極輪21Bは、移動路P2を挟んで高さ方向Hの上下に互いに対向して配置されている。電極輪21Aと電極輪21Bは、長さ方向Lおよび幅方向Wの位置が一致するように配置されている。 [Welded portion 20]
Next, the welded
As shown in FIGS. 1 (a) and 6 (c), the welded
The
電極輪21A,21Bにより鋼板Sを溶接する際には、電極輪21Aを降下させることにより、電極輪21Aと電極輪21Bを鋼板Sに適切な圧力をもって接触させる。
移動路P2よりも下方に配置される電極輪21Bは、支持台12Bに固定される支持ロッド22Bに支持されている。 The
When the steel plate S is welded by the electrode rings 21A and 21B, the
The
次に、圧下部30について説明する。
圧下部30は、図1(a)に示すように、溶接部20の前方(F)の側に隣接して設けられており、溶接部20で溶接された鋼板Sの溶接部分を圧下して平坦化する。ここで行われる塑性加工はスウェージング(Swaging)と称される。 [Compression lower part 30]
Next, the compression
As shown in FIG. 1A, the compression
圧下ロール31Aと圧下ロール31Bは、移動路P2を挟んで高さ方向Hの上下に互いに対向して配置されている。圧下ロール31Aと圧下ロール31Bは、長さ方向Lおよび幅方向Wの位置が一致するように配置されている。 As shown in FIGS. 1A and 6D, the compression
The
移動路P2よりも下方に配置される圧下ロール31Bは、支持台12Bに固定される支持ロッド32Bに支持されている。この支持ロッド32Bの伸縮動作により圧下ロール31Bが移動路P2に対して昇降してもよい。 The
The
次に、冷却部40について説明する。
冷却部40は、図1および図7(a)に示すように、散水ノズル41から圧下部30により平坦化された溶接部分の上面および下面の両方に向けて冷却水CWを供給する。この冷却水CWの供給により、溶接部分は急冷され、焼入れされる。
この冷却水CWは、好ましくは粒状として供給される。粒状としては、粒径の小さいミスト状、ミスと状よりも粒径の大きいシャワー状があるが、ミスト状の冷却水であることが好ましい。理由は以下の通りである。つまり、冷却水をミスト状にすることで使用する水量を少なくする。これにより、水処理の設備を小さくかつ簡単なものにでき、さらに、水量が少なくなることで、圧下部30に及ぶ冷却水の量も少なくなる、という効果が奏されるからである。 [Cooling unit 40]
Next, the cooling
As shown in FIGS. 1 and 7A, the cooling
This cooling water CW is preferably supplied as granules. As the granules, there are mist-like particles having a small particle size and shower-like particles having a larger particle size than mistakes and shapes, but mist-like cooling water is preferable. The reason is as follows. That is, the amount of water used is reduced by making the cooling water mist. This is because the water treatment equipment can be made small and simple, and the amount of water is reduced, so that the amount of cooling water reaching the compression
次に、加熱部50について説明する。
加熱部50は、図1および図7(b)に示すように、冷却部40からの冷却水の供給により焼入れされた溶接部分をヒータ51により加熱して、焼戻しする。 [Heating unit 50]
Next, the
As shown in FIGS. 1 and 7B, the
この中で、IHヒータは、電磁コイルから発生させる電磁界を鋼板Sの溶接部分に印加することにより、誘導されたうず電流を溶接部分に流す。鋼板Sは電気的な抵抗を持っているので、流れる電流により溶接部分は発熱する。このように、加熱部50としてIHヒータを用いると、鋼板Sの急速な加熱を実現しやすい。焼戻しについて詳しくは後述する。 As long as the tempering action can be exhibited, the mechanism by which the
Among these, the IH heater applies an electromagnetic field generated from the electromagnetic coil to the welded portion of the steel plate S to allow an induced eddy current to flow through the welded portion. Since the steel plate S has an electrical resistance, the welded portion generates heat due to the flowing current. As described above, when the IH heater is used as the
ここでは、加熱部50を鋼板Sの下方だけに設けたが、鋼板Sの上方および下方の両方に設けることもできる。 As shown in FIG. 7C, when the steel sheet S passes through the
Here, the
次に、接合装置1を用いて先行鋼板S1と後行鋼板S2を溶接する手順を、さらに図8および図9を参照して説明する。なお、図8は接合装置1が往路を移動する過程を示し、図9は接合装置1が復路を移動する過程を示している。 [Welding procedure]
Next, the procedure for welding the leading steel plate S1 and the trailing steel plate S2 using the joining
この表面被膜の除去の際には、図4(b)および図6(a)に示すように、押えロール62A,62Bが鋼板Sの先端部を表裏から加圧するので、仮に当該先端部がうねるなどして変形していたとしても、押えロール62A,62Bの間およびその近傍ではブラシロール61A,61Bと鋼板Sとの相対的位置を一定に保つように変形が少なくとも加圧時には矯正される。 When the moving
When removing the surface coating, as shown in FIGS. 4 (b) and 6 (a), the
以上で往路における手順を終えるので、接合装置1は次に復路を移動する。接合装置1が往路を移動する際には、溶接部20および圧下部30は先行鋼板S1および後行鋼板S2に接触するように準備がなされ、冷却部40から冷却水の噴霧が行われる。 Further, when the joining
Now that the procedure on the outward route is completed, the joining
接合装置1が復路の移動をさらに進めると、図9(d)に示すように、接合装置1は後退位置まで戻り、先行鋼板S1と後行鋼板S2を溶接する一連の手順が完了する。そうすると、先行鋼板S1と後行鋼板S2が繋がった鋼板Sは次工程に向けて搬送される。 As the joining
When the joining
以下、本実施形態に係る接合装置1が奏する効果を説明する。
接合装置1によれば、ブラシロール61A,61Bのように軟質な研削材のみを鋼板Sに押し当てたとしても解消することが難しい、うねりなどの変形が鋼板Sに存在するとしても、表面被膜を除去する際に、押えロール62A,62Bにより鋼板Sを表裏から加圧することで、加圧時の加圧部位においては変形が解消され、ブラシロール61A,61Bに対する鋼板Sの相対的な位置を一定に保つことができる。その結果、ブラシロール61A,61Bに加わる鋼板Sからの反力が均等になるので、表面被膜を鋼板Sから安定して除去できる。 [Effect]
Hereinafter, the effect of the joining
According to the joining
こうした本実施形態の被膜除去部とは異なり、鋼板Sの表裏に、主軸63A,63Bの方向に対して直交した方向(長さ方向L)に沿って設置された一対の研削ロールが、主軸63A,63Bの方向に対して直交した軸線の周りに回転しながら鋼板Sを研削する構成(比較例)を想定するならば、鋼板Sの幅全域に亘る研削ロールの軸長の分、被膜除去部が大型化する上、研削ロールの軸長が長いほど、研削ロールの軸方向において研削の度合がばらつきやすい。研削ロールに加えて、鋼板Sを加圧する一対の加圧ロールが研削ロールに対して平行に設置されるならば、被膜除去部が鋼板Sの搬送方向にも大型化し、また、加圧ロールの軸方向において加圧の度合もばらつきやすい。
本実施形態のように、回転しながら鋼板Sを横断しつつ研削するブラシロール61A,61Bに対して、対応する押えロール62A,62Bが、主軸63A,63Bの方向(幅方向W)に並んで配置される構成によれば、鋼板Sにおける表面被膜の除去範囲の幅に相応の薄いブラシロール61A,61Bと、同等に薄い押えロール62A,62Bとを採用することができ、しかも、ブラシロール61A,61Bと押えロール62A,62Bとを主軸63Aの方向(幅方向W)に近づけて配置できる。したがって、上記比較例に対し、被膜除去部60が占めるスペースを長さ方向Lにも幅方向Wにも削減しつつ、鋼板Sの幅の全域に亘り均一にブラシロール61A,62Aおよび押えロール62A,62Bを接触させながら、表面被膜を鋼板Sから安定して除去することができる。 In the present embodiment, the brush rolls 61A and 61B move the steel sheet S in a direction orthogonal to the direction of the transport path P1 (FIG. 1) of the steel sheet S while the brush rolls 61A and 61B rotate, so that the width of the steel sheet S is from one end to the other end. In contrast to the brush rolls 61A and 61B that move while rotating, the corresponding presser rolls 62A and 62B are the
Unlike the film removing portion of the present embodiment, a pair of grinding rolls installed on the front and back of the steel plate S along a direction (length direction L) orthogonal to the directions of the
As in the present embodiment, the corresponding presser rolls 62A and 62B are arranged in the direction of the
本発明において、図10に示すように、押えロール62Aと押えロール62Bの位置を、鋼板Sの移動方向DS(長さ方向L)にずらして配置することができる。しかも、被膜除去時に、上側に位置する押えロール62Aの最下点の高さが、下側に位置する押えロール62Bの最上点の高さ以下になるように配置する。つまり、鋼板Sのおもて側の押えロール62Aによる圧下位置が鋼板Sの高さ位置PLを越える(鋼板Sの上面US以下)とともに、鋼板Sのうら側の押えロール62Bの圧下位置が鋼板Sの高さ位置PLを越えて(鋼板Sの下面LS以上)配置される。なお、上面US、下面LSは、平坦な鋼板Sが搬送路P1を搬送され、クランプ79により挟み込まれ固定されたときの鋼板Sの上面と下面とを想定している。また、圧下位置は、押えロール62Aにおいてはその下端、押えロール62Bにおいてはその上端で定義される。
図10に示すように、ブラシロール61A,61Bは押えロール62A,62Bと同軸上に配置されているものとする。 [Positioning of presser rolls 62A and 62B]
In the present invention, as shown in FIG. 10, the positions of the
As shown in FIG. 10, it is assumed that the brush rolls 61A and 61B are arranged coaxially with the presser rolls 62A and 62B.
以上のように配置される押えロール62A,62Bの間を鋼板Sが通過するときに、図10に示すように、鋼板Sは押えロール62Aと押えロール62Bのそれぞれに接する範囲が湾曲する。したがって、平坦FLとされた前述の実施形態に比べてブラシロール61A,61Bと鋼板Sの接触する面積が増えることにより、表面被膜の除去能力が向上する。
By arranging the
When the steel plate S passes between the
なお、おもて側の押えロール62Aとうら側の押えロール62Bの何れか一方だけで鋼板Sを湾曲させても、前述の実施形態に比べてブラシロール61A,61Bと接触する面積を増やすことができる。 Therefore, the upper
Even if the steel plate S is curved by only one of the
鋼板Sの表面被膜を除去する時間に比例して、ブラシロール61A,61Bは摩耗する。摩耗量が増えるとブラシロール61A,61Bが小径になって、表面被膜を除去するのに必要な力で鋼板Sに対してブラシロール61A,61Bを接触させることができなくなる。このブラシロール61A,61Bの摩耗に対応して、押えロール62A,62Bの径を小さくすることができる。押えロール62A,62Bの小径化の手段としては、以下の第1手段~第4手段がある。 [Brush rolls 61A and 61B for wear]
The brush rolls 61A and 61B wear in proportion to the time for removing the surface coating of the steel plate S. As the amount of wear increases, the diameters of the brush rolls 61A and 61B become smaller, and the brush rolls 61A and 61B cannot be brought into contact with the steel plate S with the force required to remove the surface coating. The diameters of the
第1手段は、押えロール62A,62Bの表面を切削するというものである。図12を参照してその一例を説明する。
第1手段は、図12に示すように、押えロール62A,62Bの先端面を切削する工具、例えばナールカッターまたはローレットカッターと称される切削工具81を、押えロール62A,62Bの先端面に対向して設ける。通常、切削工具81は図12(a)、(b)に示すように、押えロール62A,62Bの先端面から離れている。
第1手段としての被膜除去装置は、切削工具81に加え、ブラシロール61A,61Bの摩耗量をそれぞれ検出するセンサ、例えば光電センサ83と、光電センサ83により得られた情報に基づき、切削工具81にブラシロール61A,61Bを切削するよう指示する制御部86(図12(a))とを備えている。光電センサ83は、一例として発光素子83Aと受光素子83Bを備えている。発光素子83Aと受光素子83Bは、図12(a)に示すように、ブラシロール61A,61Bの摩耗量が少ないときには、発光素子83Aからの検査光DLがブラシロール61Aに遮られることで、受光素子83Bが検査光DLを受光できない。ところが、ブラシロール61A,61Bの摩耗量が多くなり、例えばブラシロール61A,61Bの先端面が押えロール62A,62Bの先端面と同等の高さになると、図12(b)に示すように、発光素子83Aからの検査光DLがブラシロール61Aを通過するので、受光素子83Bは検査光DLを受光する。
光電センサ83は、ブラシロール61A,61Bの摩耗状態を示す情報を取得する摩耗状態情報取得部に相当する。ここでは、ブラシロール61A,61Bの摩耗量が使用限界に達したこと(摩耗状態)を示す情報が、検査光DLに相当する。こうした光電センサ83に代えて、巻尺、レーザを利用した変位計等を用いてブラシロール61A,61Bの摩耗量を取得することができる。
あるいは、ブラシロール61A,61Bの摩耗量が増え、それに伴い押えロール62A,62Bの外端からのブラシロール61A,61Bの突出量が減少することでモータ66A,66Bの出力軸67A,67Bのトルクが減少するため、モータ66A,66Bから取得したトルクをブラシロール61A,61Bの摩耗量に変換してもよい。この場合は、摩耗状態情報取得部としてのモータ66A,66Bの出力トルクが、ブラシロール61A,61Bの摩耗状態を示す情報に相当する。 First means: Cutting the presser rolls 62A and 62B The first means is to cut the surface of the presser rolls 62A and 62B. An example thereof will be described with reference to FIG.
In the first means, as shown in FIG. 12, a tool for cutting the tip surfaces of the presser rolls 62A and 62B, for example, a
In addition to the
The
Alternatively, the amount of wear of the brush rolls 61A and 61B increases, and the amount of protrusion of the brush rolls 61A and 61B from the outer ends of the presser rolls 62A and 62B decreases accordingly, so that the torque of the
その後、図12(c)に示すように、光電センサ83の位置をそれまでよりも下げて、ブラシロール61Aの摩耗の検出を行う。
上記光電センサ83の代わりに、摩耗量を計測するセンサを設け、計測された摩耗量が所定値になると切削を開始するようにしてもよい。 The inspection light DL received by the
After that, as shown in FIG. 12C, the position of the
Instead of the
ラチェットの他に、押えロール62A,62Bと主軸63A,63Bの間にキー溝を設けておき、押えロール62A,62Bを切削する際にはこのキー溝にキーを差し込んで、押えロール62A,62Bの回転を止めることができる。接合装置1の運転時にはキー溝からキーを取り除く。 In order to cut the presser rolls 62A and 62B with the cutting
In addition to the ratchet, a key groove is provided between the presser rolls 62A and 62B and the
図12に示すように、切削工具81と同期して移動する接触センサ84を設け、接触センサ84がブラシロール61A,61Bに接触したら切削工具81による切削を終了する。 The cutting amount of the presser rolls 62A and 62B can be controlled as follows, for example.
As shown in FIG. 12, a
第2手段は、押えロール62A,62Bを複数の部材から構成しておき、ブラシロール61A,61Bの摩耗量に応じて、最外層にあたる部材を取り除くというものである。
その一例として、図13(a)に示すように、押えロール62A(62B)を円板状の第1部材62A1と、第1部材62A1の外周に嵌合される円環状の第2部材62A2とに分割可能に構成する。ブラシロール61A,61Bの摩耗量が増えて所定値に達すると、例えばロボットアーム(図示しない)により、最外層にあたる第2部材62A2(外周側の層)を取り外して、第1部材62A1(内周側の層)だけから押えロール62A(62B)を構成する。ここでは、押えロール62A(62B)を2層構造とする例を示したが、3層以上の構造とすることもできる。 Second means: Multi-layered presser rolls 62A and 62B In the second means, the presser rolls 62A and 62B are composed of a plurality of members, and a member corresponding to the outermost layer is formed according to the amount of wear of the brush rolls 61A and 61B. It's about getting rid of it.
As an example thereof, as shown in FIG. 13A, the
第3手段は、押えロール62A,62Bを径の小さいものと交換するというものである。
その一例として、図13(b)に示すように、当初は半径R1の押えロール62A(62B)を用いていたのに対して、ブラシロール61A(61B)の摩耗量が増えて所定値に達すると、半径R2(R1>R2)の押えロール62A(62B)に交換する。以後も同様に、摩耗量に応じて径の小さい押えロール62A(62B)に交換することもできる。
なお、図13(a)に示したようにブラシロール61A,61Bの摩耗量に応じて押えロール62A,62Bの最外層を取り除くことも、図13(b)に示した小径の押えロールへの交換に相当する。図13(a)に示した複数層化の手法によれば、径の異なる複数の押えロール62Aを用意しておき、摩耗量が大きくなるほど、より径の小さな押えロール62Aに交換していく場合とは異なり、押えロール62A,62Bをブラシロール61A,61B等に対して分解したり、組戻したりする必要がない。 Third means: Replacing the presser rolls 62A and 62B The third means is to replace the presser rolls 62A and 62B with one having a smaller diameter.
As an example, as shown in FIG. 13B, the holding
Note that removing the outermost layers of the presser rolls 62A and 62B according to the amount of wear of the brush rolls 61A and 61B as shown in FIG. 13A can also be applied to the presser rolls having a small diameter shown in FIG. 13B. Corresponds to exchange. According to the multi-layered method shown in FIG. 13A, a plurality of
第4手段は、押えロール62A,62Bの鋼板Sに対する位置を変えるというものである。
その一例として、図13(c)に示すように、当初はブラシロール61A(61B)の軸線と押えロール62A(62B)の軸線とが一致するように配置されている(図13(c)の左側)。ところが、ブラシロール61A(61B)の摩耗量が増えて所定値に達すると、図13(c)の右側に示すように、シリンダ等の昇降機構によりブラシロール61Aの回転軸C61の位置を押えロール62Aの回転軸C62の位置に対して相対的に下げる。同様に、図13(c)では図示していない押えロール62Bおよびブラシロール61Bについても、シリンダ等の昇降機構によりブラシロール61Bの摩耗量が増えて所定値に達すると、ブラシロール61Bの回転軸の位置を押えロール62Bの回転軸の位置に対して相対的に上げる。 第4手段は、図14に示すように、ブラシロール61A,61Bに対して、押えロール62A,62Bが油圧シリンダ621等により独立して(相対的に)昇降できることを前提とする。この場合、押えロール62A,62Bは、ブラシロール61A,61Bの回転軸C61とは別の軸C62に支持されている。押えロール62Aの軸C62は、ブラケット622を介して油圧シリンダ621のピストンに結合し、押えロール62Bの軸C62も同様に、ブラケット622を介して油圧シリンダ621のピストンに結合している。 Fourth means: Changing the positions of the
As an example thereof, as shown in FIG. 13 (c), the axis of the
接合装置1においては、鋼板Sの変形を加圧により矯正するために押えロール62A,62Bを用いているが、鋼板Sの変形を矯正することができる限り、本発明における加圧体の構成は任意である。
加圧体の一例として、図15に示すように、鋼板Sの表裏にそれぞれ設置される無限軌道85を用いることができる。各無限軌道85は、一対の遊動輪85Aと、一対の遊動輪85Aの間に配置され、鋼板Sを加圧しつつ回転する複数の転輪85Bと、遊動輪85Aおよび転輪85Bを取り囲む無端状の履帯85Cと、を備えている。
複数の転輪85Bのうちの少なくとも1つ(例えば、図15の中央の転輪85B)の軸と、図示を省略したブラシロールの回転軸とが、図15の紙面に対して直交する方向に並んでいる。
この無限軌道85は、駆動力を要することなく、無限軌道85が設けられた移動フレーム10に対する鋼板Sの相対的な移動にともなって回動する。
無限軌道85は、押えロール62A,62Bと比べると、鋼板Sの変形を矯正できる範囲を鋼板Sの移動方向(図15の左右方向)に拡大することができる。 [Alternative means of presser rolls 62A and 62B]
In the joining
As an example of the pressurizing body, as shown in FIG. 15, an
The axis of at least one of the plurality of rolling
The
Compared with the
次に、図16~図25を参照し、本発明の第2実施形態に係る被膜除去部60-2について説明する。被膜除去部60-2は、ブラシロール61A,61Bに対して偏心した偏心軸102を含む偏心構造を備えている。被膜除去部60-2によれば、図12、図13(a)および(b)に示した例とは異なり、ブラシロール61A,61Bの摩耗量に応じて押えロール62A,62Bの径を小さくすることなく、ブラシロール61A,61Bに安定した研削力を得ることができる。 [Second Embodiment]
Next, the film removing portion 60-2 according to the second embodiment of the present invention will be described with reference to FIGS. 16 to 25. The film removing portion 60-2 has an eccentric structure including an
以下、第2実施形態の被膜除去部60-2が、第1実施形態の被膜除去部60と相違する事項を中心に説明する。第1実施形態に対応する構成要素には同じ符号を与えている。被膜除去部60-2には、上述した第1実施形態の種々の変形例(例えば、図10および図11)を適用することができる。
被膜除去部60-2は、図16および図17に示すように、ブラシロール61Aと、押えロール62Aと、ブラシロール61Aの主軸63A(回転軸)に対して偏心し、支持体100に固定されている固定軸としての固定ボス101に回転可能に支持される偏心軸102と、偏心軸102を所定の回転角度に調整可能な角度調整機構103とを備えている。 [Structure of film treatment section]
Hereinafter, the matters that the film removing section 60-2 of the second embodiment differs from the
As shown in FIGS. 16 and 17, the film removing portion 60-2 is eccentric with respect to the
ブラシロール61Aの線材群には、鋼板Sからの被膜除去に必要な剛性を満足するように、線材の材質、密度、丈等が適切に設定されている。線材の材質は、例えば、ナイロン等の樹脂や、鋼等の金属であり、鋼板Sをはじめとする被膜除去対象(接合対象)に応じて適宜に選択することができる。線材は、砥粒を含んでいてもよい。
線材の基端から先端までの長さのことを「線材丈」と称し、摩耗していない初期状態の線材丈のことを「初期線材丈」と称するものとする。 The
In the wire rod group of the
The length from the base end to the tip of the wire rod is referred to as "wire rod length", and the wire rod length in the initial state without wear is referred to as "initial wire rod length".
偏心軸102(ブッシュ)は、主軸63Aおよび固定ボス101の軸線X0に対して、所定の偏心量yeだけ偏心している。 The
The eccentric shaft 102 (bush) is eccentric with respect to the axis X0 of the
図16に示すように、ブラシロール61Aのディスク104、押えロール62A、および支持体100は、主軸63Aの方向に隣接している。
ブラシロール61Aおよび押えロール62Aのそれぞれの鋼板Sに接触する外端E1,E2が、主軸63Aの方向に並んで配置されることは、第1実施形態(図2)と同様である。
被膜除去部60-2に備わる下側のブラシロール61Bおよび押えロール62B等の図示は省略するが、上側の構造と同様に構成することができる。 The
As shown in FIG. 16, the
It is the same as the first embodiment (FIG. 2) that the outer ends E1 and E2 in contact with the respective steel plates S of the
Although not shown, the
具体的には、主軸63Aと固定ボス101との間には、ボールベアリングである第1軸受B1が配置されている。固定ボス101と偏心軸102との間には、滑り軸受である第2軸受B2が配置されている。偏心軸102と押えロール62Aとの間には、ボールベアリングである第3軸受B3が配置されている。
なお、第1~第3軸受B1~B3にはそれぞれ、荷重要件等を考慮して適宜な軸受を採用することができる。 The coating removing portion 60-2 includes a plurality of bearings B1 to B3 interposed between the
Specifically, a first bearing B1, which is a ball bearing, is arranged between the
It should be noted that appropriate bearings can be adopted for the first to third bearings B1 to B3 in consideration of load requirements and the like.
角度調整機構103は、例えば偏心軸102へ回転駆動力を伝達可能な伝達機構107と、伝達機構107の動作を規制可能なブレーキ機構108とを備えている。
伝達機構107は、一例として、スプロケット、チェーン、およびスプロケットに取り付けられたハンドルを含む。ブレーキ機構108は、一例として、スプロケットに係脱可能な爪を含む。
伝達機構107は、ハンドルに代えてモータを備えていてもよい。その他、偏心軸102を回転させて所定の回転角度に調整可能な適宜な構成を角度調整機構103に採用することができる。 The
The
The
The
軸線X1を中心とする偏心軸102の回転角度をθ1と称し、図18(a)のように、突出量が最小のy1となるときにθ1が0°であるとする。
ブラシロール61Aが摩耗せず、径が一定であるならば、回転角度θ1を0°から180°まで変化させるにつれて、突出量がy1,y2,y3と次第に増加し、180°のときに最大となる。回転角度θ1が0°のときの主軸63Aから、ブラシロール61Aにおける鋼板Sの接触箇所までの長さと、回転角度θ1が180°のときの主軸63Aから、ブラシロール61Aにおける鋼板Sの接触箇所までの長さとの差は、偏心量ye(偏心半径)の2倍に相当する(2ye)。180°を超えて360°(0°)までの間は、突出量は次第に減少する。 In FIG. 18, since the wear of the
The rotation angle of the
If the
実際には、ブラシロール61Aを使用した被膜除去時間に比例してブラシロール61Aの摩耗が進行するため、線材丈の減少に伴い、図19に示すように、ブラシロール61Aの径が、d1,d2,d3のように変化する(d1>d2>d3)。こうしたブラシロール61Aの径の変化に対応させて、偏心軸102の回転角度を変化させるならば、図19に示すように、突出量yを一定に維持することができる。
偏心軸102の回転により突出量を一定値y以上に維持することにより、突出量に相応の研削力にて安定して表面被膜の除去を行うことができる。 [Effect of film treatment]
In reality, the wear of the
By maintaining the protrusion amount at a certain value y or more by rotating the
回転角度を180°に維持したまま、それ以降もブラシロール61Aの使用を継続すると、突出量yは減少する。しかし、突出量yが使用限界に達して必要な切削力が得られなくなるまでは、同一のブラシロール61Aの使用を継続することができる。突出量yが使用限界に達すると、線材の寿命が尽きるから、ブラシロール61Aの交換が必要となる。 If the
If the
図21に、ブラシロール61Aと押えロール62Aとが同じ主軸63Aを中心に回転する場合(#1)と、本実施形態のようにブラシロール61Aに対して押えロール62Aが偏心した状態で回転する場合(#2)とのそれぞれにおける被膜除去部の運用例を示している。上述したように、#2では、#1と比べて長い初期線材丈のブラシロール61Aが採用されている。#1では、初期線材丈が一例として20mmのブラシロール61Aが使用され、#2では、初期線材丈が一例として25mmのブラシロール61Aが使用されるものとする。なお、突出量yが長いほど、線材が鋼板Sに当たる領域の面積が広いので、鋼板Sの表面の高さがばらついていても、研削力を安定させることができる。
以下、ブラシロール61Aおよび押えロール62Aを例に取り説明するが、ブラシロール61Bおよび押えロール62Bについても同様である。 [Operation example of film processing unit]
In FIG. 21, when the
Hereinafter, the
加えて、#2の初期線材丈が#1の初期線材丈と比べて長いことにより、同一の使用条件下において使用開始から線材の寿命が尽きるまでのブラシロール61Aの使用可能期間を#1に対して大幅に延長することができる。 On the other hand, in the case of # 2, the wire length gradually decreases from the initial state due to wear, which is the same as in # 1, but the protrusion amount y is kept constant by adjusting the rotation angle of the
In addition, since the initial wire length of # 2 is longer than the initial wire length of # 1, the usable period of the
上段に示す#1の場合、aのブラシロール61Aの使用を開始し、摩耗により突出量yが使用限界に達すれば、aからbにブラシロール61Aを交換する。なお、ブラシロール61Aを交換する際には、線材群の先端を平坦に整えて鋼板Sに当たり易くする面出し作業が行われる。bについて突出量yが使用限界に達すれば、さらにcへと交換する。cについても突出量yが使用限界に達すれば、より小さな径の押えロール62Aに交換するステップSt0を挟んで、aの2度目の使用を再開する。その後は、上記と同様に、突出量yの使用限界への到達に伴い、b,cと順次交換しながら、被膜除去処理をおこなう。ここでは、2度目の使用による摩耗により、a~cのいずれの線材も寿命が尽きるので、新しいブラシロール61Aを入手する必要がある。 FIG. 22 shows an operation example of three
In the case of # 1 shown in the upper row, the
aの線材の寿命が尽きた後は、b,cへと順次交換し、a~cの全ての寿命が尽きたならば新しいブラシロール61Aを入手する必要がある。
図22に示す運用例によれば、a~cを合わせた連続使用可能期間で比べても、#2は、#1と比べて大幅に長い使用可能期間を実現することができる。 Next, in the case of # 2, unlike # 1, it is not necessary to replace the
After the life of the wire rod of a has expired, it is necessary to sequentially replace it with b and c, and when all the life of a to c has expired, it is necessary to obtain a
According to the operation example shown in FIG. 22, even when compared with the continuous usable period in which a to c are combined, # 2 can realize a significantly longer usable period than # 1.
被膜除去部60-2は、図23に示すように、追加の構成要素として、ブラシロール61Aの摩耗量を示す情報を取得する摩耗量取得部112と、当該情報を用いて、摩耗量に応じた偏心軸102の回転角度θ1を取得する角度取得部113とを備えていることが好ましい。
摩耗量取得部112は、例えば、レーザを利用した変位計に相当する。その他、摩耗量取得部112は、図12に示した光電センサ83であってもよく、あるいは、ブラシロール61Aを駆動するモータ66Aであってもよい。モータ66Aを用いる場合は、モータ66Aから取得したトルクをブラシロール61Aの摩耗量に変換することができる。 [Modification example of coating treatment part]
As shown in FIG. 23, the film removing unit 60-2 uses the wear
The wear
例えば図24に計算例を示すように、偏心軸102の回転角度θ1と、鋼板Sにブラシロール61Aの外端E1が接触する箇所における所定径の押えロール62Aの外端E2の高さとの間には所定の関係がある。ここで言う外端E2の高さは、θ1が0°のときの外端E2の位置を基準として、この基準位置(0)から法線方向に、鋼板Sから離れる側へ(押えロール62Aの例で言えば上方へ)測ったときの高さに相当する。ブラシロール61Aおよび押えロール62Aのそれぞれの径、並びに偏心量ye、突出量yを制御装置1Aの記憶部に記憶しておけば、角度取得部113は、当該記憶部に記憶された情報と、摩耗量取得部112により得られた情報が示す摩耗量とに基づいて、外端E1,E2の間に一定の距離(突出量y)を与える回転角度θ1を算出することができる。
摩耗量取得部112および角度取得部113により得られる回転角度θ1を偏心軸102に与えることによれば、ブラシロール61Aに一定の突出量yを確実に与えることができる。 The
For example, as shown in FIG. 24, the rotation angle θ 1 of the
By giving the rotation angle θ 1 obtained by the wear
偏心軸回転装置115は、偏心軸102に連結されたスプロケット等に設けられたモータ、および電磁ブレーキ等を含む。
偏心軸制御装置114は、摩耗量取得部112により得られた回転角度θ1を示す制御指令を偏心軸回転装置115に与える。制御指令により、偏心軸回転装置115は、電磁ブレーキを解除して偏心軸102を回転角度θ1に回転駆動した後、電磁ブレーキを作動させて偏心軸102の回転を規制する。 The rotational operation of the
The eccentric shaft
The eccentric
図25を参照し、被膜除去部60-2により行われる被膜除去工程に関し、偏心軸102を調整するための手順の一例を説明する。
押えロール62Aにより鋼板Sを加圧しつつブラシロール61Aにより鋼板Sを研削する被膜除去のステップSt1は、上述した被膜除去の工程と同様にして所定のサイクルで行われる。 [Procedure for adjusting the eccentric axis to the rotation angle according to the amount of wear]
With reference to FIG. 25, an example of a procedure for adjusting the
The film removing step St1 of grinding the steel sheet S with the
当該情報が示す摩耗量が規定値に達していたならば(St4でYes)、角度取得部113により、当該摩耗量と、ブラシロール61Aおよび押えロール62Aのそれぞれの径、並びに偏心量ye、突出量yを用いた演算処理等によって回転角度θ1を導く(St5)。
偏心軸102を回転角度θ1に調整するにあたり、偏心軸制御装置114は、偏心軸回転装置115にブレーキ開(St6)、偏心軸の回転(St7)、およびブレーキ閉(St8)の制御指令を順次与える。偏心軸102の回転角度の調整は、被膜除去部60-2による被膜除去の処理が行われていない時に行われる。
その他、偏心軸102の回転角度の調整は、角度調整機構103のハンドルに付された目盛を利用して、ハンドルを手動で回転させることで行ってもよい。 According to the
If the wear amount indicated by the information has reached the specified value (Yes in St4), the
In adjusting the
In addition, the rotation angle of the
被膜除去部60-2によれば、ブラシロール61A,61Bの摩耗量に追従させた突出量yの制御を、押えロール62Aを主軸63Aに対して偏心させた構造により実現しているので、ブラシロール61A,61Bを昇降させる油圧シリンダ65A,65Bとは別途、押えロール62Aを昇降させる油圧シリンダ621(図14)等を装備する必要がない。つまり、被膜除去部60-2によれば、シリンダ等の装備により主軸63A,63Bの方向に大型化するのを避けながら、ブラシロール61Aの摩耗量にかかわらず、安定した研削力を保持することができる。 According to the film removing unit 60-2 of the second embodiment described above, when the brush rolls 61A and 61B are worn out, the presser rolls 62A and 62B are replaced to reduce the diameter of the presser rolls 62A and 62B. By rotating the
According to the film removing unit 60-2, the control of the protrusion amount y that follows the wear amount of the brush rolls 61A and 61B is realized by the structure in which the
以上の各実施形態においては、マッシュシーム溶接を行う接合装置1を例にして説明したが、本発明が適用される接合方法はこれに限らない。一対の鋼板S、その他の金属板の端部同士を重ね合わせて接合する際に、表面被膜を除去する必要のある接合方法に広く適用できる。具体的な一例として、摩擦攪拌接合(FSW:Friction Stir Welding)が該当する。 [Type of joining device]
In each of the above embodiments, the joining
1A 制御装置
10 移動フレーム
11A 接続端
11B 開口
12A,12B 支持台
13 車輪
14 下面
20 溶接部
21A,21B 電極輪
22A,22B 支持ロッド
23 油圧シリンダ
24 ピストン
30 圧下部
31A,31B 圧下ロール
32A,32B 支持ロッド
33 油圧シリンダ
34 ピストン
40 冷却部
41 散水ノズル
50 加熱部
51 ヒータ
60,60-2 被膜除去部(被膜除去装置)
61A,61B ブラシロール(研削材、回転体)
62A,62B 押えロール(加圧材、回転体)
63A,63B 主軸(回転軸)
64A,64B 支持ブラケット(支持体)
65A,65B 油圧シリンダ
66A,66B モータ
67A,67B 出力軸
68A,68B 第1プーリ
69A,69B 第2プーリ
71A,71B 第3プーリ
72A,72B 第4プーリ
73A,73B 第1伝導ベルト
74A,74B 第2伝導ベルト
75A,75B 回転軸
76A,76B 防水カバー
77A,77B 防水カーテン
79 クランプ
81 切削工具
83 光電センサ(摩耗状態情報取得部)
85 無限軌道(加圧体)
86 制御部
90 切断部
91A,91B せん断刃
100 支持体
101 固定ボス
102 偏心軸
103 角度調整機構
107 伝達機構
108 ブレーキ機構
621 油圧シリンダ(昇降機構)
B1 第1軸受
B2 第2軸受
B3 第3軸受
C61 回転軸
C62 回転軸(軸)
E1,E2 外端
X0,X1 軸線
y 突出量
ye 偏心量
1 Joining
61A, 61B Brush roll (abrasive, rotating body)
62A, 62B Presser roll (pressurizing material, rotating body)
63A, 63B Spindle (Rotating shaft)
64A, 64B support bracket (support)
65A, 65B
85 Track (pressurized body)
86
B1 1st bearing B2 2nd bearing B3 3rd bearing C61 Rotating shaft C62 Rotating shaft (shaft)
E1, E2 Outer ends X0, X1 Axial line y Overhang amount y e Eccentric amount
Claims (15)
- 回転軸に支持される回転体からなり、接合対象の表裏に形成される表面被膜を除去する一対の研削材と、
一対の前記研削材により前記表面被膜が除去される前記接合対象を表裏から挟んで前記接合対象に対して移動しながら加圧する一対の加圧体と、を備え、
前記研削材および前記加圧体のそれぞれの前記接合対象に接触する外端が、前記回転軸の方向に並んで配置される、
被膜除去装置。 A pair of abrasives that consist of a rotating body supported by a rotating shaft and remove the surface coating formed on the front and back of the object to be joined, and
A pair of pressurizing bodies for which the surface coating is removed by the pair of abrasives and the bonding object is sandwiched from the front and back and pressed while moving against the bonding object.
The outer ends of the abrasive and the pressurizing body in contact with the joining object are arranged side by side in the direction of the rotation axis.
Film remover. - 前記研削材は、駆動源により回転駆動され、
前記加圧体は、前記研削材の回転に対して空転する回転体である、
請求項1に記載の被膜除去装置。 The abrasive is rotationally driven by a drive source.
The pressurizing body is a rotating body that idles with respect to the rotation of the abrasive.
The film removing device according to claim 1. - 前記加圧体は、前記回転軸を回転可能に支持する支持体に軸受を介して支持される、
請求項2に記載の被膜除去装置。 The pressurizing body is supported via a bearing on a support that rotatably supports the rotating shaft.
The film removing device according to claim 2. - 前記回転軸に対して偏心し、前記支持体に備わる固定軸に回転可能に支持される偏心軸と、
前記偏心軸を所定の回転角度に調整可能な角度調整機構と、を備え、
前記加圧体は、前記偏心軸を中心に回転可能に、前記偏心軸を介して前記固定軸に支持される、
請求項3に記載の被膜除去装置。 An eccentric shaft that is eccentric with respect to the rotating shaft and is rotatably supported by a fixed shaft provided on the support.
An angle adjusting mechanism capable of adjusting the eccentric axis to a predetermined rotation angle is provided.
The pressurizing body is rotatably supported by the fixed shaft via the eccentric shaft so as to be rotatable about the eccentric shaft.
The film removing device according to claim 3. - 前記研削材の摩耗量を示す情報を取得する摩耗量取得部と、
前記摩耗量に応じた前記偏心軸の前記回転角度を取得する角度取得部と、を備える、
請求項4に記載の被膜除去装置。 A wear amount acquisition unit that acquires information indicating the wear amount of the abrasive, and
An angle acquisition unit for acquiring the rotation angle of the eccentric shaft according to the amount of wear is provided.
The film removing device according to claim 4. - 前記加圧体は、前記研削材の前記回転軸とは別の軸に支持される回転体からなり、前記研削材に対して相対的に昇降可能である、
請求項1または請求項2に記載の被膜除去装置。 The pressurizing body is composed of a rotating body supported by a shaft different from the rotating shaft of the abrasive, and can move up and down relative to the abrasive.
The film removing device according to claim 1 or 2. - 前記接合対象のおもて側に配置される前記研削材および前記加圧体と、前記接合対象のうら側に配置される前記研削材および前記加圧体とは、
それぞれの前記回転軸が水平方向にずれて配置されており、かつ被膜除去時に、
前記おもて側の前記加圧体の最下点の高さが前記うら側の前記加圧体の最上点の高さ以下に配置される、
請求項3~請求項5のいずれか一項に記載の被膜除去装置。 The abrasive and the pressurizing body arranged on the front side of the joining target and the grinding material and the pressurizing body arranged on the back side of the joining target are
When the respective rotation axes are arranged so as to be offset in the horizontal direction and the film is removed,
The height of the lowest point of the pressurizing body on the front side is arranged to be equal to or lower than the height of the highest point of the pressurizing body on the back side.
The film removing device according to any one of claims 3 to 5. - 回転体からなる前記加圧体の外周を切削する切削工具と、
前記研削材の摩耗状態を示す情報を取得する摩耗状態情報取得部と、
前記摩耗状態情報取得部により得られた前記情報に基づき、前記切削工具に前記加圧体を切削するよう指示する制御部と、を備える、
請求項3~請求項5、請求項7のいずれか一項に記載の被膜除去装置。 A cutting tool that cuts the outer circumference of the pressurizing body made of a rotating body,
A wear state information acquisition unit that acquires information indicating the wear state of the abrasive, and
A control unit for instructing the cutting tool to cut the pressurizing body based on the information obtained by the wear state information acquisition unit is provided.
The film removing device according to any one of claims 3 to 5, and 7. - 前記加圧体は、内周側の層と、外周側の層とを含む複数の層に分割可能に構成される、
請求項1~請求項8のいずれか一項に記載の被膜除去装置。 The pressurizing body is configured to be separable into a plurality of layers including a layer on the inner peripheral side and a layer on the outer peripheral side.
The film removing device according to any one of claims 1 to 8. - 接合対象の表裏に形成される表面被膜を、前記表裏のそれぞれに配置される一対の回転体からなる研削材の回転により除去する方法であって、
前記研削材の回転の軸方向に前記研削材と並んで、かつ前記表裏のそれぞれに配置される一対の加圧体により前記接合対象を前記表裏から挟んで前記接合対象に対して移動しながら加圧して、一対の前記研削材により前記表面被膜を除去する、
被膜除去方法。 It is a method of removing the surface coating formed on the front and back surfaces of a joining target by rotating a grinding material composed of a pair of rotating bodies arranged on the front and back surfaces.
A pair of pressurizing bodies arranged side by side with the abrasive in the axial direction of rotation of the abrasive and placed on each of the front and back surfaces sandwich the bonding object from the front and back surfaces and apply the bonding object while moving with respect to the bonding object. Press to remove the surface coating with the pair of abrasives.
Film removal method. - 前記加圧体は回転体からなり、
前記加圧体は、前記接合対象の相対的な移動に追従して、前記接合対象が相対的に移動する向きに、前記研削材の回転に対して空転する、
請求項10に記載の被膜除去方法。 The pressurizing body is composed of a rotating body.
The pressurizing body follows the relative movement of the bonding object and idles with respect to the rotation of the abrasive in the direction in which the bonding object moves relatively.
The film removing method according to claim 10. - 前記研削材および前記加圧体は共通する回転軸または別々の軸に支持される回転体からなり、
前記接合対象のおもて側に配置される前記加圧体において前記接合対象を下向きに湾曲させる、又は、
前記接合対象のうら側に配置される前記加圧体において前記接合対象を上向きに湾曲させる、
請求項10または請求項11に記載の被膜除去方法。 The abrasive and the pressurizing body consist of a rotating body supported by a common rotating shaft or separate shafts.
In the pressurizing body arranged on the front side of the joining target, the joining target is curved downward or
In the pressurizing body arranged on the back side of the joining target, the joining target is curved upward.
The film removing method according to claim 10 or 11. - 前記加圧体は、前記研削材の回転軸に対して偏心した偏心軸を中心に回転可能であり、
前記研削材の摩耗量を示す情報を用いて前記偏心軸を所定の回転角度に制御する、
請求項11に記載の被膜除去方法。 The pressurizing body can rotate about an eccentric axis eccentric with respect to the rotation axis of the abrasive.
The eccentric axis is controlled to a predetermined rotation angle by using the information indicating the amount of wear of the abrasive.
The film removing method according to claim 11. - 前記加圧体は、前記研削材の前記回転軸とは別の軸に支持される回転体からなり、前記研削材に対して相対的に昇降可能であり、
前記研削材の摩耗量が所定値に達すると、
前記接合対象のおもて側に配置される前記加圧体の軸を前記研削材の前記回転軸に対して昇降機構により引き上げ、前記接合対象のうら側に配置される前記加圧体の軸を前記研削材の前記回転軸に対して昇降機構により引き下げる、
請求項12または請求項13に記載の被膜除去方法。 The pressurized body is composed of a rotating body supported by a shaft different from the rotating shaft of the abrasive, and can move up and down relative to the abrasive.
When the amount of wear of the abrasive reaches a predetermined value,
The shaft of the pressurizing body arranged on the front side of the joining target is pulled up by an elevating mechanism with respect to the rotating shaft of the abrasive, and the shaft of the pressurizing body arranged on the back side of the joining target. Is pulled down by an elevating mechanism with respect to the rotating shaft of the abrasive.
The film removing method according to claim 12 or 13. - 請求項1~請求項9のいずれか一項に記載の被膜除去装置と、
前記表面被膜が除去され重ね合わされた前記接合対象を接合する接合機と、を備える接合装置。
The film removing device according to any one of claims 1 to 9.
A joining device including a joining machine for joining the joining objects on which the surface coating is removed and superposed.
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KR1020217020526A KR102513659B1 (en) | 2019-06-04 | 2020-04-28 | Film removal device, film removal method, and bonding device |
CN202080008081.3A CN113260484B (en) | 2019-06-04 | 2020-04-28 | Film removing device, film removing method, and bonding device |
JP2021524715A JP7085693B2 (en) | 2019-06-04 | 2020-04-28 | Film remover, film remover, and joining device |
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PCT/JP2019/022167 WO2020245913A1 (en) | 2019-06-04 | 2019-06-04 | Coating film removal device, coating film removal method, joining device, and joining method |
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CN113260484A (en) | 2021-08-13 |
JP7085693B2 (en) | 2022-06-16 |
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CN113260484B (en) | 2023-06-02 |
KR102513659B1 (en) | 2023-03-23 |
WO2020245913A1 (en) | 2020-12-10 |
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