CN113084328B - Tool clamp for fixing long weld to-be-welded part and friction stir welding system - Google Patents

Tool clamp for fixing long weld to-be-welded part and friction stir welding system Download PDF

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Publication number
CN113084328B
CN113084328B CN202110286406.0A CN202110286406A CN113084328B CN 113084328 B CN113084328 B CN 113084328B CN 202110286406 A CN202110286406 A CN 202110286406A CN 113084328 B CN113084328 B CN 113084328B
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welded
positioning
plate
connecting plate
welded part
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CN113084328A (en
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陈友展
宋明
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Ningbo Youzhi Machinery Technology Co ltd
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Ningbo Youzhi Machinery Technology Co ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/12Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
    • B23K20/122Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
    • B23K20/1245Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding characterised by the apparatus
    • B23K20/126Workpiece support, i.e. backing or clamping
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/12Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
    • B23K20/122Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
    • B23K20/1245Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding characterised by the apparatus

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)

Abstract

The application relates to a tooling fixture for fixing long-weld workpieces to be welded and a friction stir welding system, wherein the tooling fixture comprises a mounting plate, a turnover type positioning and pressing mechanism, a circumferential positioning mechanism and a workpiece to be welded pre-positioning mechanism, the turnover type positioning and pressing mechanism, the circumferential positioning mechanism and the workpiece to be welded pre-positioning mechanism are arranged on the mounting plate, a placing platform for placing the workpieces to be welded is arranged on the mounting plate, the circumferential positioning mechanism is used for circumferentially positioning the workpieces to be welded, and the workpiece to be welded pre-positioning mechanism is used for pre-positioning at least one workpiece to be welded; convertible location hold-down mechanism includes the connecting plate, set up in the turning device at connecting plate both ends and connect on same connecting plate and to two at least clamp plates that the equidirectional extends, and adjacent clamp plate compresses tightly respectively in the both sides of treating the welding seam of weldment, and turning device drives one side that the clamp plate kept away from the connecting plate and uses one side that is close to the connecting plate to overturn as the direction that the axial was kept away from the weldment. This application can be better to the panel of long welding seam press from both sides tight fixed, reduces its skew that causes in welding process, and the yields of the work piece after the welding shaping is higher.

Description

Tool clamp for fixing long-weld-seam to-be-welded part and friction stir welding system
Technical Field
The application relates to the field of welding fixtures, in particular to a tool fixture for fixing a long welding line to-be-welded part and a friction stir welding system.
Background
Friction stir welding is characterized in that a welded material is locally melted by heat generated by friction between a welding tool rotating at a high speed and a to-be-welded part, and when the welding tool moves forwards along a welding interface, a plasticized material flows from the front part to the rear part of the welding tool under the action of the rotating friction force of the welding tool and forms a compact solid-phase welding seam under the extrusion of the welding tool. The friction stir welding machine is an apparatus for welding a workpiece to be welded by a friction stir welding technique, and generally, a tooling fixture on the friction stir welding machine is designed correspondingly according to the different workpieces to be welded.
Because of the superiority of friction stir welding in welding metal sheets, friction stir welding is generally applied to welding metal materials having long weld seams and large cross sections. Because the last unloading of waiting to weld usually adopts devices such as portal crane to carry out vertical loading and unloading, and the stirring head of friction stir welding machine also arranges the top of waiting to weld, therefore in order to avoid causing the interference to stirring head and last unloading, present frock clamp adopts a large amount of equipartitions to wait that the lever hydro-cylinder of welding week side carries out the centre gripping fixed to treating to weld to avoid waiting to weld to take place skew and dislocation in welding process.
However, the tool clamp has certain disadvantages when welding long welding seams. Because the parts to be welded are only fixed by the lever oil cylinders on the peripheral sides, the fixing strength of the part positioned at the central position of the long welding line is lower, and the rigid fixing required by the process can not be met sometimes, so that the conditions of deflection, height dislocation and the like of the two parts to be welded can often occur in the welding process, and the quality after forming is influenced.
Disclosure of Invention
In order to improve the clamping and fixing strength of the long welding seam to-be-welded part, the application provides a tool clamp and a friction stir welding system for fixing the long welding seam to-be-welded part.
First aspect, the utility model provides a frock clamp for fixing long welding seam waits weldment adopts following technical scheme:
a tooling fixture for fixing long-weld workpieces to be welded comprises a mounting plate, a turnover type positioning and pressing mechanism, a circumferential positioning mechanism and a workpiece pre-positioning mechanism, wherein the turnover type positioning and pressing mechanism, the circumferential positioning mechanism and the workpiece pre-positioning mechanism are arranged on the mounting plate;
convertible location hold-down mechanism includes the connecting plate, sets up in the turning device at connecting plate both ends and connects on same connecting plate and to two at least clamp plates that the equidirectional extends, and is adjacent the clamp plate compresses tightly respectively in the both sides of treating the welding seam of weldment, the turning device drive one side that the connecting plate was kept away from to the clamp plate uses one side that is close to the connecting plate to keep away from the direction upset of treating the weldment as the axial.
Through adopting above-mentioned technical scheme, the setting up of clamp plate makes the part of long welding seam both sides all can fix the welding piece through the effect of convertible location hold-down mechanism with treating, and then improves its stability in welding process, compares more stably with the fixed mode of the lever cylinder of week side, and presss from both sides tightly the effect better. And through the setting of tilting mechanism for the clamp plate can be opened or treat the weldment through the mode of upset and compress tightly, can not influence the normal unloading of treating the weldment on going up, also need not to set up too much spare part at the upside of treating the weldment simultaneously, can not influence the normal welding of friction stir welding machine. In addition, the circumferential side of the weldment to be treated can be limited and fixed by the arrangement of the circumferential positioning mechanism, the circumferential side of the weldment to be treated is matched with the turnover positioning and pressing mechanism, the rigid fixation of the weldment to be treated can be realized, and the strength is higher.
Preferably, turning device includes the connecting seat, sets up connecting rod on the connecting seat and articulates the upset driving piece on the connecting seat, the upset driving piece is located the top of connecting rod, just the connecting rod rotates with the connecting plate to be connected, the actuating lever and the connecting plate of upset driving piece rotate to be connected, the drive of upset driving piece the connecting plate uses and rotates as the axle with connecting rod articulated axis.
Through adopting above-mentioned technical scheme, when the upset driving piece drive, can act on the connecting plate with the effort, and then make the connecting plate can be followed and take place to rotate with connecting rod articulated shaft to realize the function of the upset of clamp plate.
Preferably, a lever oil cylinder is fixed on the mounting plate and used for pressing one side of the pressing plate, which is far away from the connecting plate, and each pressing plate corresponds to at least one lever oil cylinder.
Through adopting above-mentioned technical scheme, this kind of setting can improve the clamp plate and treat the compressing tightly effect of weldment time in the fixed, improves the compressive strength who treats the weldment in the vertical direction, further improves the stability of treating the weldment in welding process.
Preferably, the connecting plate below is provided with the drive connecting plate downstream in order to force the clamp plate to push down the driving piece that compresses tightly, it is fixed with the fixed plate in the drive shaft of driving piece to compress tightly, the below of connecting plate is provided with the articulated seat articulated with the fixed plate, set up on the fixed plate and supply the waist shape hole that slides with articulated shaft of articulated seat, the connecting rod is connected with the connecting seat is articulated.
Through adopting above-mentioned technical scheme, can further improve the fixed effect of treating the weldment through compressing tightly the fixed effect of driving piece and the mutually supporting of lever cylinder. In addition, the number of lever cylinders can be reduced in this way, and the purpose of simultaneously pressing a plurality of pressing plates can be achieved only by arranging a plurality of pressing driving pieces on the connecting plate.
Preferably, the circumferential positioning mechanism comprises at least one positioning device arranged on the circumferential side to be welded, and the positioning device comprises a base, a positioning block connected to the base in a sliding manner and used for being abutted to the part to be welded, and a loading driving piece for forcing the positioning block to be abutted to the part to be welded.
Through adopting above-mentioned technical scheme, can make the locating piece with wait that the weldment supports tightly so that wait that the weldment can be restricted by circumference positioning mechanism and be in a fixed region through loading the loading of driving piece to the locating piece, make things convenient for subsequent convertible location hold-down mechanism to treat that the weldment compresses tightly to make the clamp plate can not skew the predetermined region that compresses tightly, also can make the adjacent laminating that waits that can be inseparable between the weldment together simultaneously, improve the product quality after the weld forming.
Preferably, the positioning device further comprises an elastic driving piece, and the elastic driving piece drives the positioning block to be always in butt joint with the to-be-welded piece.
By adopting the technical scheme, in the process of gradually loading the to-be-welded parts, the loading driving part can not act on the positioning block, but the elastic force of the elastic driving part pushes the positioning block to enable the positioning device to level and tightly support the adjacent to-be-welded parts, so that the to-be-welded parts can be conveniently loaded.
Preferably, the elastic driving part includes the stopper and sets up the elastic component on the stopper, the stopper is fixed in on the base, be provided with the spacing groove that supplies the stopper to wear to establish and slide on the locating piece, the elastic component sets up in the spacing groove and the both ends of elastic component are connected with the cell wall and the stopper of spacing groove respectively, the elastic component forces the locating piece has the trend of sliding to waiting to weld.
By adopting the technical scheme, the assembly of the elastic part is facilitated, the whole positioning device is convenient to produce and assemble, the structure is simple, and the design is reasonable.
Preferably, the to-be-welded part pre-positioning mechanism comprises a sliding pin assembly and a sliding pin driving part for driving the sliding pin assembly, at least one to-be-welded part is provided with a positioning hole for the sliding pin assembly to be positioned and penetrated, and the sliding pin driving part drives the sliding pin assembly to penetrate into the positioning hole or be separated from the positioning hole.
Through adopting above-mentioned technical scheme, treat that weldment prepositioning mechanism can treat the weldment clamp before to the corresponding weldment is fixed a position loading driving piece to make and treat that the weldment that treats between weldment prepositioning mechanism and the positioner can all keep the butt through the effect of elastic driving piece, thereby make to treat that the butt is reliable between the weldment, reduce to treat that the weldment takes place the probability of skew. After the to-be-welded part is fixed, the sliding pin driving part can drive the sliding pin assembly to be separated from the to-be-welded part, so that the sliding pin assembly is prevented from being inclined and deviated due to excessive stress in the welding process, and the positioning precision of subsequent operation is improved.
Preferably, the sliding pin assembly comprises a sliding seat and a pin shaft horizontally connected to the sliding seat in a sliding manner, and the sliding direction of the pin shaft on the sliding seat is the same as the extending direction of the welding seam of the workpiece to be welded.
By adopting the technical scheme, the arrangement improves the efficiency of the workpiece to be welded in the loading process when the workpiece is matched with the pin shaft, the alignment precision is higher, and the loading efficiency of the workpiece to be welded is improved.
In a second aspect, the friction stir welding system provided by the present application employs the following technical solution:
a friction stir welding system comprises the tool clamp.
In summary, the present application includes at least one of the following beneficial technical effects:
1. parts on two sides of the long welding line can fix the to-be-welded part under the action of the turnover type positioning and pressing mechanism, so that the stability of the to-be-welded part in the welding process is improved, the clamping effect is better, and the qualified rate of the welded and formed product is higher;
2. the location is accurate, treats that the handling efficiency of weldment is high.
Drawings
Fig. 1 is a schematic structural view of a tool holder according to an embodiment.
FIG. 2 is a top view of a tooling fixture in accordance with one embodiment.
Fig. 3 is a schematic structural diagram of the turnover positioning and pressing mechanism in one embodiment.
Fig. 4 is a schematic view of a hinge.
FIG. 5 is a schematic view of an embodiment of a compression driver and a retaining plate.
Fig. 6 is a front view of the flip positioning hold down mechanism of an embodiment, wherein the platen is in a hold down state.
Fig. 7 is a front view of the flip type positioning and pressing mechanism of an embodiment, wherein the pressing plate is in a flipped open state.
Fig. 8 is a schematic structural diagram of a circumferential positioning mechanism, a placing platform, a to-be-welded part pre-positioning mechanism and an ejection mechanism in an embodiment.
FIG. 9 is a schematic view of a positioning device according to an embodiment.
FIG. 10 is an exploded view of a positioning device in accordance with an embodiment.
FIG. 11 is a top view of an embodiment of a positioning device with a cover plate removed.
FIG. 12 is a schematic view of a positioning device according to another embodiment.
FIG. 13 is a schematic structural diagram of a to-be-welded part prepositioning mechanism of an embodiment.
FIG. 14 is a schematic structural diagram of another embodiment to-be-welded part prepositioning mechanism.
FIG. 15 is an exploded view of a slide pin assembly of another embodiment to-be-welded part prepositioning mechanism.
Description of reference numerals: 1. mounting a plate; 2. a turnover positioning and pressing mechanism; 3. a circumferential positioning mechanism; 4. placing a platform; 21. a connecting plate; 22. a turning device; 23. pressing a plate; 221. a connecting seat; 222. a connecting rod; 223. turning over the driving piece; 24. an articulation member; 25. a hinge plate; 241. a connecting portion; 242. an installation part; 243. hinging a shaft; 26. compressing the driving member; 27. a lever cylinder; 28. a fixing plate; 29. a hinged seat; 281. a kidney-shaped hole; 231. a substrate; 232. a reinforcing plate; 233. a butting block; 31. a positioning device; 311. a base; 312. positioning blocks; 313. an elastic driving member; 314. loading a driving member; 32. a butting seat; 3111. a mounting seat; 3112. a cover plate; 3113. a sliding groove; 3121. a slipping section; 3122. an abutment section; 3131. a limiting block; 3132. an elastic member; 3123. a limiting groove; 3133. a positioning column; 3124. a guide surface; 3125. an abutment plane; 5. a pre-positioning mechanism for the piece to be welded; 51. a slide pin assembly; 52. a slide pin drive; 53. positioning the bracket; 511. a sliding seat; 512. a pin shaft; 513. a limiting member; 514. a T-shaped groove; 515. a T-shaped block; 6. an ejection mechanism; a. and (6) welding.
Detailed Description
The present application is described in further detail below with reference to figures 1-15.
The embodiment of the application discloses a tool clamp for fixing a long welding line to-be-welded part. Referring to fig. 1 and 2, the tooling fixture includes an installation plate 1, a turnover positioning and pressing mechanism 2 arranged on the installation plate 1, a circumferential positioning mechanism 3, and a placing platform 4 located in the circumferential positioning mechanism 3 and used for placing a to-be-welded part. The circumferential positioning mechanism 3 is used for circumferentially positioning the to-be-welded part, and the turnover positioning and pressing mechanism 2 is used for applying pressure in the vertical direction to the to-be-welded part so as to rigidly fix the to-be-welded part on the placing platform 4. In this embodiment, the to-be-welded members are strip-shaped, and a joint seam formed by mutually splicing adjacent to-be-welded members is a to-be-welded seam a. For convenience of explanation, the weld seams a on the to-be-welded part are parallel to each other in the present application, but it should be noted that the weld seams a and the weld seams a are not necessarily designed in a completely parallel manner, and only need to be extended in substantially the same direction.
Referring to fig. 2 and 3, the turnover positioning and pressing mechanism 2 includes a connecting plate 21, turnover devices 22 disposed at two ends of the connecting plate 21, and at least two pressing plates 23 connected to the same connecting plate 21 and extending in the same direction, and the adjacent pressing plates 23 are respectively pressed on two sides of a weld a of a to-be-welded part. The number of the pressing plates 23 is related to the number of the welding seams a, and generally, the number of the pressing plates 23 is at least larger than the number of the welding seams a. The turnover device 22 is used for driving one side of the pressing plate 23, which is far away from the connecting plate 21, to turn in a direction which is far away from the piece to be welded by taking one side close to the connecting plate 21 as an axial direction, so that the pressing plate 23 is separated from the piece to be welded. When the turning device 22 drives the pressing plate 23 to be fully opened, the vertical projection of the to-be-welded part does not intersect with the pressing plate 23 and the connecting plate 21, and the to-be-welded part can vertically move upwards under the action of the assembling and disassembling mechanism to be separated from the circumferential positioning mechanism 3.
The turning device 22 is disposed at two sides of the placing platform 4, and the turning device 22 includes a connecting seat 221 fixed relative to the mounting plate 1, a connecting rod 222 hinged to the connecting seat 221 and rotatably connected to the connecting plate 21, and a turning driving member 223 hinged to the connecting seat 221. The tumble drive 223 is preferably a hydraulic cylinder in this embodiment, the tumble drive 223 is located above the connecting rod 222, and the drive rod of the tumble drive 223 is rotatably connected with the connecting plate 21. By extending and shortening the turnover driving member 223, the connecting plate 21 can be driven to rotate around the axis hinged to the connecting rod 222, so that the pressing plate 23 can be turned over.
Referring to fig. 3 and 4, in particular, a hinge 24 for the connection rod 222 to hinge is fixed below the connection plate 21, a hinge 25 for the driving rod of the turning driving member 223 to hinge is fixed above the connection plate 21, and a vertical projection of a hinge point of the hinge 25 and the turning driving member 223 is located on a side of the connection plate 21 close to the connection seat 221. The hinge 24 includes a connecting portion 241 fixed on the connecting plate 21, two parallel mounting portions 242 integrally disposed on the connecting portion 241 and extending to a side away from the connecting plate 21, and an articulated shaft 243, the connecting rod 222 is inserted between the mounting portions 242 of two adjacent sides, and the articulated shaft 243 sequentially penetrates through the mounting portions 242 and the connecting rod 222 and is axially limited and mounted on the mounting portions 242 so as to realize the rotational connection between the hinge 24 and the connecting rod 222.
Referring to fig. 2 and 3, a plurality of pressing driving members 26 fixed on the mounting plate 1 are arranged below the connecting plate 21, a plurality of lever cylinders 27 fixed opposite to the mounting plate 1 are arranged at one end of the pressing plate 23 away from the connecting plate 21, each pressing plate 23 corresponds to at least one lever cylinder 27, and the pressing plate 23 can be forced to press the to-be-welded piece downwards through the combined action of the lever cylinders 27 and the pressing driving members 26. Specifically, the driving end of the lever cylinder 27 is configured to press against the upper end surface of the pressing plate 23, and when the driving shaft of the lever cylinder 27 retracts, the driving end of the lever cylinder 27 tilts upward to be away from the rotation path of the pressing plate 23.
Referring to fig. 3 and 5, the compression driving members 26 are preferably hydraulic cylinders in this embodiment, a fixing plate 28 is fixedly connected to the driving shaft of each compression driving member 26, hinge seats 29 hinged to the fixing plate 28 in a one-to-one correspondence are disposed below the connecting plate 21, and a waist-shaped hole 281 for sliding a hinge shaft 243 hinged to the hinge seats 29 is formed in the fixing plate 28 along a horizontal direction. The specific structures of the hinge seat 29 and the hinge 24 are the same and will not be described herein. It should be noted that this arrangement reduces the number of cylinders and the pressure is applied to all of the pressure plates 23 by means of only a plurality of compression drives 26 which are evenly spaced, at a lower cost than the lever cylinders 27 on the other side.
Referring to fig. 6 and 7, when the pressing plate 23 is in a state of pressing the workpiece to be welded, the lever cylinder 27 presses the pressing plate 23, and the pressing driving member 26 is in a contracted state so that the two sides of the pressing plate 23 are synchronously stressed, and at this time, the upper side hole wall of the waist-shaped hole 281 on the fixing plate 28 abuts against the hinge shaft 243 to transmit the pulling force of the pressing driving member 26. When the turnover positioning pressing mechanism 2 is switched to the turnover state, the lever cylinder 27 and the pressing driving member 26 first act to firstly remove the pressure at the two ends of the pressing plate 23, at this time, the connecting plate 21 is lifted upwards under the action of the pressing driving member 26, the hinge shaft 243 on the hinge seat 29 slides on the fixing plate 28, and the turnover driving member 223 and the connecting rod 222 correspondingly rotate by a certain amount under the synchronous action of the connecting plate 21. Thereafter, the inversion driving unit 223 is operated to rotate the connecting plate 21 about the axis hinged to the connecting rod 222, and the hinge base 29 is also rotated about the fixing plate 28. In synchronization with the rotation of the connecting plate 21, the pressing plate 23 also rotates about the hinge shaft 243 where the connecting rod 222 is hinged to the connecting plate 21, and is disengaged from the workpiece to be welded.
Preferably, when the pressing driving member 26 is contracted to the maximum stroke and the clamping driving member is contracted to the maximum stroke, the turning driving member 223 and the connecting rod 222 are parallel to each other and kept in a horizontal state, and a connecting line from a hinge point of the turning driving member 223 and the connecting seat 221 to a hinge point of the connecting rod 222 and the connecting seat 221 is parallel to a connection from the hinge point of the turning driving member 223 and the hinge plate 25 to a hinge point of the hinge 24 and the connecting rod 222. Thus, by this arrangement, the four hinge points are interconnected to form a parallelogram, and the four points can still form a parallelogram by the hinge shaft 243 of the hinge seat 29 sliding in the kidney-shaped hole 281 of the fixed plate 28 during the extension of the compression driving member 26.
Referring to fig. 3, the pressing plate 23 further includes a base plate 231 fixedly connected to the connecting plate 21 and a reinforcing plate 232 fixed above the base plate 231, and an abutment block 233 for abutting against a to-be-welded member is fixed below the base plate 231. Through changing the thickness of the abutting block 233, the pressing plate 23 can be adapted to various workpieces to be welded with different surface heights, so that the adjustment is more convenient and the efficiency is higher.
Referring to fig. 8 and 9, the circumferential positioning mechanism 3 includes at least one positioning device 31 disposed on the circumferential side of the to-be-welded part, and the positioning device 31 includes a base 311, a positioning block 312 slidably connected to the base 311 and configured to abut against the to-be-welded part, an elastic driving element 313 for driving the positioning block 312 to approach and abut against the to-be-welded part all the time, and a loading driving element 314 for forcing the positioning block 312 to abut against the to-be-welded part. When waiting for the workpiece to be welded to be loaded on the placing platform 4, the loading driving member 314 is not in the state of driving the positioning block 312, but the positioning block 312 has a certain elasticity by the action of the elastic driving member 313 so that it can have a floating action within a small range.
The positioning device 31 can be arranged on each side of the piece to be welded, and can be increased or decreased according to actual conditions. In the present embodiment, the above-described positioning means 31 are provided on both sides perpendicular to the extending direction of the weld a in consideration of the interference of the connection plate 21 and the actual shape of the work to be welded. On both sides of the extension direction of the weld a, however, the positioning means 31 are provided only on the side where the lever cylinder 27 is arranged, while the other side is an abutment seat 32 fixed to the placement platform 4 and abutting against the piece to be welded. Preferably, the abutting seats 32 and the positioning devices 31 correspond to each to-be-welded part one by one, that is, one positioning device 31 and one abutting seat 32 are correspondingly arranged on two sides of each to-be-welded part, and each to-be-welded part placed on the placing platform 4 can be kept in abutting contact with the abutting seat 32 under the action of the positioning device 31 on one side in the loading process of the to-be-welded part.
Referring to fig. 9 and 10, specifically, the base 311 includes a mounting seat 3111 and a cover plate 3112 fixed on an upper side of the mounting seat 3111, and a sliding groove 3113 for sliding the positioning block 312 is horizontally provided between the mounting seat 3111 and the cover plate 3112 along a clamping direction. Positioning block 312 includes slip section 3121 and butt section 3122, and slip section 3121 wears to locate in slip groove 3113 and slides and connect on base 311, and butt section 3122 extends to the outside of base 311 and is used for with treating the welding piece butt. The loading driving member 314 is preferably provided as a hydraulic cylinder in this embodiment and is fixed to an end of the base 311 extending away from the abutting section 3122, and the driving rod of the loading driving member 314 is inserted into the sliding groove 3113 and abuts against a side of the sliding section 3121 away from the abutting section 3122.
Referring to fig. 10 and 11, the elastic driving element 313 includes a stopper 3131 and an elastic element 3132 disposed on the stopper 3131, the stopper 3131 is fixed on the cover 3112 of the base 311 by bolts, a stopper groove 3123 for the stopper 3131 to penetrate and slide is disposed on one side of the positioning block 312 facing the cover 3112, and when the positioning block 312 slides on the base 311, the stopper 3131 can also slide in the stopper groove 3123 correspondingly. The elastic element 3132 is preferably a compression spring, the limiting block 3131 is integrally provided with a positioning post 3133 penetrating through the compression spring, and two ends of the compression spring are respectively connected to a groove wall of the limiting groove 3123 facing the abutting section 3122 and the limiting block 3131, when the loading driving element 314 is not in the loading state, the compression spring will force the positioning block 312 to have a tendency of sliding outward along the direction from the sliding section 3121 to the abutting section 3122. Therefore, when the positioning block 312 slides outwards to the maximum stroke, the distance between the positioning block 312 and the positioning block 312 of the positioning device 31 on the other side or the abutting seat 32 on the other side needs to be smaller than the loaded size of the workpiece to be welded, so that a certain pre-tightening force can be applied to the workpiece to be welded.
Referring to fig. 10, in order to facilitate loading of the to-be-welded part, one end of the positioning block 312, which is abutted against the to-be-welded part, is provided with a guide surface 3124, the guide surface 3124 is inclined toward a side close to the base 311 in a direction from bottom to top, and when the to-be-welded part is loaded from top to bottom, the positioning block 312 is forced to retract toward the base 311 by abutment of the to-be-welded part against the guide surface 3124. However, in order to maintain the connection strength between the positioning block 312 and the member to be welded when abutting against each other, one end of the positioning block 312, which is used for abutting against the member to be welded, is provided with an abutting plane 3125 which abuts against the member to be welded, and the abutting plane 3125 is located below the guide surface 3124.
After the to-be-welded part is loaded, the loading driving member 314 operates to lock the positioning block 312 and apply a certain pressure to the to-be-welded part, and the driving force of the elastic driving member 313 is negligible, so that the to-be-welded part can be limited in the circumferential direction in a limited area by simultaneously operating the positioning devices 31 arranged in the circumferential direction of the to-be-welded part.
Referring to fig. 10 and 12, the shape of the positioning block 312 may be adjusted according to the size of the workpiece to be welded that is in contact with the positioning block and the influence of the space in which the positioning device 31 is located. In one embodiment, the width of the abutting section 3122 in the horizontal direction is greater than the width of the sliding section 3121 in the horizontal direction, so that a larger contact area between the positioning block 312 and the to-be-welded part is provided. In another embodiment, the width of the abutting section 3122 in the horizontal direction is equal to the width of the sliding section 3121 in the horizontal direction. Therefore, according to the two embodiments, the width of the abutting section 3122 in the horizontal direction may be smaller than the width of the sliding section 3121 in the horizontal direction.
Referring to fig. 8 and 13, in order to define the position of the weldment to be welded during the loading process, the area of the placing platform 4 is further provided with a mechanism 5 for pre-positioning the weldment. The pre-positioning mechanism 5 for the workpiece to be welded comprises a sliding pin assembly 51, a sliding pin driving piece 52 for driving the sliding pin assembly 51 and a positioning bracket 53. The positioning bracket 53 is fixed relative to the mounting plate 1, the slide pin driving member 52 is fixed on the positioning bracket 53, and the driving rod of the slide pin driving member 52 is upward inserted into the positioning bracket 53, meanwhile, the driving rod of the slide pin driving member 52 is coaxially fixed with the slide pin assembly 51, and the slide pin assembly 51 penetrates through the positioning bracket 53 and extends out of the positioning bracket 53. The to-be-welded parts are preset with positioning holes for the sliding pin assembly 51 to penetrate through, the sliding pin driving member 52 drives the sliding pin assembly 51 to penetrate into the corresponding positioning holes so that the corresponding to-be-welded parts and the placing platform 4 are kept relatively fixed, and when the sliding pin assembly 51 is separated from the positioning holes, the corresponding to-be-welded parts can lose the limitation of the sliding pin assembly 51 in the horizontal direction and slide.
Referring to fig. 13, in an embodiment, the sliding pin assembly 51 may be only one pin 512, but in another embodiment of the present application, referring to fig. 14 and 15, the sliding pin assembly 51 includes a sliding seat 511 fixed to the driving rod of the sliding pin driving member 52, a pin 512 horizontally slidably connected to the sliding seat 511, and a limiting member 513 limiting a sliding stroke of the pin 512, a T-shaped groove 514 is horizontally formed on the sliding seat 511 along an extending direction of the welding line a, and correspondingly, the pin 512 is provided with a T-shaped block 515 penetrating and slidably connected to the T-shaped groove 514. The limiting member 513 is disposed in an annular shape and fixed on the sliding seat 511 in a sleeved manner, and two sides of the T-shaped groove 514 are limited by the limiting member 513 to prevent the pin 512 from being separated from the sliding seat 511.
With reference to fig. 8, therefore, during the process of loading the to-be-welded piece corresponding to the to-be-welded piece pre-positioning mechanism 5 onto the placing platform 4 (i.e. during the loading process), the pin 512 slides on the sliding seat 511 under the guiding action of the taper of the end portion and partially penetrates into the to-be-welded piece, and as the to-be-welded piece is gradually pressed down, the loading stroke of the to-be-welded piece is limited due to the action of the pin 512, and the pin 512 slides along with the pressing down of the to-be-welded piece. However, due to the arrangement of the positioning devices 31 and the abutting seats 32 at the two ends of the to-be-welded part, and the pin shaft 512 cannot slide in the direction perpendicular to the welding line a, the to-be-welded part is horizontally limited on the placing platform 4 under the action of the to-be-welded part pre-positioning mechanism 5, so that the subsequent to-be-welded part can be conveniently loaded.
Preferably, the to-be-welded part pre-positioning mechanism 5 is preferentially used for fixing the most middle to-be-welded part, and after the fixing of the part to-be-welded part is finished, the to-be-welded parts on the two sides are loaded step by step. However, it should be noted that when the to-be-welded piece is completely fixed by the tooling fixture and waits for welding, the slide pin assembly 51 needs to be retracted under the action of the slide pin driving member 52 to be separated from the to-be-welded piece, so as to avoid the stress generated during welding from bending the slide pin assembly 51.
Further, an ejection mechanism 6 for ejecting the welded to-be-welded piece from the circumferential positioning mechanism 3 is further disposed on the region where the placement platform 4 is located, and the ejection mechanism 6 may be formed by a hydraulic cylinder, which is a common technical means for those skilled in the art and is not described herein again. Preferably, however, the ejection mechanisms 6 are symmetrically arranged on both sides of the to-be-welded part prepositioning mechanism 5.
The implementation principle of the tool clamp for fixing the long weld to-be-welded part is as follows: in the process of loading the to-be-welded part, the turnover type positioning and pressing mechanism 2 is firstly turned over, the to-be-welded part is gradually loaded onto the placing platform 4 according to a preset loading sequence, then the loading driving part 314 in each positioning device 31 acts to clamp the to-be-welded part, and then the turnover device 22 acts to press the turnover type positioning and pressing mechanism 2 onto the to-be-welded part to wait for welding. After the welding is finished, the turnover type positioning and pressing mechanism 2 is turned over according to a preset opening mode, the loading driving piece 314 in each positioning device 31 retracts, and the to-be-welded piece after the welding is finished is ejected by the ejection mechanism 6 to wait for the gantry crane to unload.
The embodiment of the application also discloses a friction stir welding system, which comprises a friction stir welding machine and the tooling clamp, wherein the tooling clamp can be fixed on the machine tool of the friction stir welding machine and can also be detachably connected with the machine tool of the friction stir welding machine, and the specific detachable connection mode is a conventional technical means of the technical personnel in the field, and is not repeated here.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: equivalent changes in structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (7)

1. The utility model provides a frock clamp for fixed long welding seam waits weldment which characterized in that: the welding device comprises an installation plate (1), a turnover type positioning and pressing mechanism (2) arranged on the installation plate (1), a circumferential positioning mechanism (3) and a to-be-welded part pre-positioning mechanism (5), wherein a placing platform (4) for placing a to-be-welded part is arranged on the installation plate (1), the circumferential positioning mechanism (3) is used for circumferentially positioning the to-be-welded part, and the to-be-welded part pre-positioning mechanism (5) is used for pre-positioning at least one to-be-welded part;
the turnover type positioning and pressing mechanism (2) comprises a connecting plate (21), turnover devices (22) arranged at two ends of the connecting plate (21) and at least two pressing plates (23) which are connected to the same connecting plate (21) and extend towards the same direction, the adjacent pressing plates (23) are respectively pressed on two sides of a welding seam of a to-be-welded part, and the turnover devices (22) drive one side, away from the connecting plate (21), of each pressing plate (23) to turn in the direction, away from the to-be-welded part, of the side, close to the connecting plate (21), of the pressing plate (23 in the axial direction;
the overturning device (22) comprises a connecting seat (221), a connecting rod (222) arranged on the connecting seat (221) and an overturning driving piece (223) hinged to the connecting seat (221), the overturning driving piece (223) is located above the connecting rod (222), the connecting rod (222) is rotatably connected with the connecting plate (21), a driving rod of the overturning driving piece (223) is rotatably connected with the connecting plate (21), and the overturning driving piece (223) drives the connecting plate (21) to rotate by taking an axis hinged to the connecting rod (222) as an axis;
the mounting plate (1) is fixedly provided with lever oil cylinders (27), the lever oil cylinders (27) are used for pressing one sides of the pressure plates (23) far away from the connecting plate (21), and each pressure plate (23) corresponds to at least one lever oil cylinder (27);
the connecting plate (21) below is provided with the drive connecting plate (21) and moves down in order to force the clamp plate (23) to push down compresses tightly driving piece (26), be fixed with fixed plate (28) in compressing tightly the drive shaft of driving piece (26), the below of connecting plate (21) is provided with and articulates articulated seat (29) with fixed plate (28), set up on fixed plate (28) and supply with articulated shaft (243) articulated waist shape hole that slides of articulated seat (29), connecting rod (222) are connected with connecting seat (221) are articulated.
2. The tooling clamp for fixing the long-weld workpiece to be welded according to claim 1, characterized in that: the circumferential positioning mechanism (3) comprises at least one positioning device (31) arranged on the circumferential side of the part to be welded, and the positioning device (31) comprises a base (311), a positioning block (312) connected to the base (311) in a sliding mode and used for being abutted to the part to be welded, and a loading driving piece (314) forcing the positioning block (312) to be abutted to the part to be welded.
3. The tooling clamp for fixing the long-weld workpiece to be welded according to claim 2, characterized in that: the positioning device (31) further comprises an elastic driving piece (313), and the elastic driving piece (313) drives the positioning block (312) to always tend to be abutted against a to-be-welded piece.
4. The tooling clamp for fixing the long-weld workpiece to be welded according to claim 3, characterized in that: elastic driving piece (313) include stopper (3131) and set up elastic component (3132) on stopper (3131), stopper (3131) are fixed in on base (311), be provided with on locating piece (312) and supply stopper (3131) to wear to establish and spacing groove (3123) that slide, elastic component (3132) set up in spacing groove (3123) and the both ends of elastic component (3132) are connected with the cell wall and stopper (3131) of spacing groove (3123) respectively, elastic component (3132) force locating piece (312) have to wait the trend that the weldment slided.
5. The tooling clamp for fixing the long-weld workpiece to be welded according to claim 3, characterized in that: the to-be-welded part pre-positioning mechanism (5) comprises a sliding pin assembly (51) and a sliding pin driving part (52) for driving the sliding pin assembly (51), at least one to-be-welded part is provided with a positioning hole for the sliding pin assembly (51) to be positioned and penetrated, and the sliding pin driving part (52) drives the sliding pin assembly (51) to penetrate into the positioning hole or be separated from the positioning hole.
6. The tooling clamp for fixing the long-weld workpiece to be welded according to claim 5, characterized in that: the sliding pin assembly (51) comprises a sliding seat (511) and a pin shaft (512) which is horizontally connected to the sliding seat (511) in a sliding mode, and the sliding direction of the pin shaft (512) on the sliding seat (511) is the same as the extending direction of a welding seam of a piece to be welded.
7. A friction stir welding system, comprising: comprising a tool holder according to any one of claims 1-6.
CN202110286406.0A 2021-03-17 2021-03-17 Tool clamp for fixing long weld to-be-welded part and friction stir welding system Active CN113084328B (en)

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* Cited by examiner, † Cited by third party
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CN206614196U (en) * 2017-04-01 2017-11-07 马鞍山南实科技有限公司 Casing rectangular slits agitating friction welding clamp
CN110193659A (en) * 2019-07-05 2019-09-03 江苏北人机器人***股份有限公司 Fixture for agitating friction weldering
CN209598577U (en) * 2019-03-20 2019-11-08 苏州市哈工万洲自动化有限公司 A kind of agitating friction weldering automatic jig for realizing aluminum alloy splicing plate whole face clamping
CN211331780U (en) * 2019-12-25 2020-08-25 北京世佳博科技发展有限公司 Friction stir welding tool for battery tray

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070246876A1 (en) * 2006-04-21 2007-10-25 The Boeing Company Reconfigurable Low-Profile Pneumatic Edge-Clamp Systems and Methods

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN206614196U (en) * 2017-04-01 2017-11-07 马鞍山南实科技有限公司 Casing rectangular slits agitating friction welding clamp
CN209598577U (en) * 2019-03-20 2019-11-08 苏州市哈工万洲自动化有限公司 A kind of agitating friction weldering automatic jig for realizing aluminum alloy splicing plate whole face clamping
CN110193659A (en) * 2019-07-05 2019-09-03 江苏北人机器人***股份有限公司 Fixture for agitating friction weldering
CN211331780U (en) * 2019-12-25 2020-08-25 北京世佳博科技发展有限公司 Friction stir welding tool for battery tray

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