CN117564123B - Reducing device and production system of high-ductility cold-rolled ribbed steel bar - Google Patents
Reducing device and production system of high-ductility cold-rolled ribbed steel bar Download PDFInfo
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- CN117564123B CN117564123B CN202311704281.4A CN202311704281A CN117564123B CN 117564123 B CN117564123 B CN 117564123B CN 202311704281 A CN202311704281 A CN 202311704281A CN 117564123 B CN117564123 B CN 117564123B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 117
- 239000010959 steel Substances 0.000 title claims abstract description 117
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 238000001125 extrusion Methods 0.000 claims abstract description 55
- 238000004513 sizing Methods 0.000 claims abstract description 14
- 238000005520 cutting process Methods 0.000 claims description 49
- 230000005540 biological transmission Effects 0.000 claims description 42
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 17
- 238000010438 heat treatment Methods 0.000 claims description 12
- 230000002093 peripheral effect Effects 0.000 claims description 11
- 238000005096 rolling process Methods 0.000 claims description 10
- 238000009434 installation Methods 0.000 claims description 2
- 238000010622 cold drawing Methods 0.000 description 23
- 238000000034 method Methods 0.000 description 19
- 230000003014 reinforcing effect Effects 0.000 description 19
- 230000008569 process Effects 0.000 description 17
- 230000002787 reinforcement Effects 0.000 description 5
- 238000012545 processing Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000000137 annealing Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/04—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire
- B21C37/047—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire of fine wires
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Abstract
The invention discloses a reducing device and a production system of a high-ductility cold-rolled ribbed steel bar, relates to the technical field of steel bar production, and can solve the problem of low elongation of the existing cold-rolled ribbed steel bar. The invention relates to a reducing device of a high-ductility cold-rolled ribbed steel bar, which comprises a reducing sleeve sleeved on a steel bar main body and a reducing driving assembly for driving the reducing sleeve to rotate along the axis of the reducing sleeve, wherein: the reducing sleeve comprises a first sizing section, a reducing section and a second sizing section which are sequentially distributed along the running direction of the steel bar main body, wherein the reducing section is provided with an extrusion structure for extruding the steel bar main body along the circumferential direction to force the steel bar main body to reduce the diameter.
Description
Technical Field
The invention relates to the technical field of steel bar production, in particular to a reducing device and a production system of a high-ductility cold-rolled ribbed steel bar.
Background
The cold rolled ribbed steel bar is produced with hot rolled wire rod base material and through re-machining, and has two or three transverse ribs in the surface along the length direction and high adhesion to concrete, and may be used widely in various building structures. But the elongation of the cold rolled ribbed steel bar is low, so that the building earthquake-proof requirement with high strength is difficult to meet.
The production process flow of the cold rolled ribbed steel bar generally comprises the following steps: firstly, taking out oxide on the surface of a base material by using a descaling device, then reducing the diameter by using a reducing device in a cold drawing and cold drawing mode, then performing secondary reducing and scoring by using a rolling mill, then releasing internal stress by annealing treatment, and finally cutting the oxide by using a flying shear.
The reducing process of the cold rolled ribbed steel bar is one of key processes affecting the performance of the steel bar, and at present, the reducing process of the cold rolled ribbed steel bar is generally treated through a cold drawing or cold drawing process, and the cold drawing process can both improve the strength of the steel bar, but because the cold drawing process and the cold drawing process both carry out strong stretching on the steel bar, the tensile stress exceeds the yield strength of the steel bar, and the steel bar is obtained after plastic deformation, the cost is that the plastic performance and the ductility performance are reduced, and no obvious deformation occurs before the steel bar is damaged. Although the existing high-ductility cold-rolled ribbed steel bar can release part of stress and improve elongation through annealing treatment, the elongation of the existing cold-rolled ribbed steel bar is improved only to a limited extent because lattice slippage occurs in the interior of the steel bar in the stretching process.
The inventor designs a reducing device and a production system of a high-ductility cold-rolled ribbed steel bar, and in the production flow of the cold-rolled ribbed steel bar, the existing cold drawing and cold drawing modes are replaced by spinning modes to reduce the diameter of a steel bar base material, so that the elongation of the cold-rolled ribbed steel bar can be effectively improved.
In view of this, the present application has been made.
Disclosure of Invention
The application aims to provide a reducing device and a production system of a high-ductility cold-rolled ribbed steel bar, which are used for solving the problem that the elongation rate of the existing cold-rolled ribbed steel bar is low.
In order to solve the technical problems, the invention adopts the following scheme:
one aspect of the application provides: a reducing apparatus for high ductility cold rolled ribbed steel bar comprising a reducing sleeve for sheathing onto a body of the steel bar, and a reducing drive assembly for driving the reducing sleeve to rotate along its axis, wherein:
The reducing sleeve comprises a first sizing section, a reducing section and a second sizing section which are sequentially distributed along the running direction of the steel bar main body, wherein the reducing section is provided with an extrusion structure for extruding the steel bar main body along the circumferential direction to force the steel bar main body to reduce the diameter.
The design conception points of the application are as follows: the rotary reducing sleeve is utilized to extrude the steel bar main body in the rotating process, so that the extruding structure of the reducing section continuously presses the reducing deformation of the steel bar main body in the circumferential direction, compared with the cold drawing and cold drawing modes in the prior art, the tensile stress along the advancing direction of the steel bar main body can be effectively reduced, the slippage of lattices in the length direction of the steel bar main body in the reducing process is reduced, the excessive reduction of the plasticity and the ductility of the steel bar main body is avoided, the extensibility of the steel bar main body after the processing is finished is improved, in particular, the steel bar main body continuously rotates in the circumferential direction to reduce the diameter through the extruding structure, and compared with the cold drawing and cold drawing modes in the prior art, a certain temperature rise is formed at the reducing position of the steel bar main body, so that the temperature at the reducing position is slightly higher than the cold drawing and the cold drawing, the internal stress of a part can be released in advance after the reducing, and the extensibility of the steel bar main body is improved.
Preferably, the extrusion structure of the reducing section is a spiral extrusion structure extending along an archimedes spiral line, and the spiral extrusion structure comprises a spiral extrusion ladder surface and a spiral extrusion wall surface for extruding the peripheral wall of the reinforcing steel bar main body and forcing the reinforcing steel bar main body to reduce the diameter;
The spiral extrusion wall surface and the spiral extrusion ladder surface are both in an Archimedes spiral line structure.
Preferably, the ratio range between the width of the spiral extrusion wall surface and the width of the spiral extrusion ladder surface is: 20 to 1.
Preferably, the screw-type extrusion wall surface is arranged parallel to the axis of the reducing sleeve.
Preferably, an included angle A is formed between the spiral extrusion wall surface and the axis of the reducing sleeve;
an included angle B is defined between a connecting line of one end, close to each other, of the first sizing section and the second sizing section and the axis of the reducing sleeve, the included angle A is smaller than the included angle B, and the included angle A is smaller than 30 degrees.
Preferably, the extrusion structure of the reducing section is a conical extrusion conical surface.
The application provides a production system of high-ductility cold-rolled ribbed steel bars, which comprises the reducing device of the high-ductility cold-rolled ribbed steel bars, a descaling device, a rolling mill set, a heating device and a flying shear, wherein the descaling device, the rolling mill set, the heating device and the flying shear are sequentially arranged along the travelling direction of the steel bars;
the precutting device comprises the following two states:
the first state is that the pre-cutting knife body moves inwards along the radial direction of the steel bar main body and simultaneously rotationally cuts the steel bar main body along the circumferential direction of the steel bar main body, and the whole pre-cutting device moves synchronously with the steel bar main body along the advancing direction of the steel bar main body;
And in the second state, a gap is reserved between the knife edge of the pre-cutting knife body and the steel bar main body, and the whole pre-cutting device resets along the direction opposite to the advancing direction of the steel bar main body.
Another idea of the application is that: through setting up precutting knife body, cutter mount pad, transmission sleeve, and precutting drive assembly, make precutting device can carry out precutting to the reinforcing bar main part, form the annular precut joint of perpendicular to reinforcing bar main part axis, make the reinforcing bar main part in the in-process of follow-up by heating device heating release internal stress, can fully expand after being heated, so that the internal stress fully releases, thereby improve the tensile properties of reinforcing bar main part, on the other hand, precut joint can be when flying shear cuts the reinforcing bar main part, make the reinforcing bar main part cut off from precut joint, can make the whole incision terminal surface of reinforcing bar main part more level, work load when reducing later stage use.
Preferably, the precutting device further comprises:
The pre-cutting driving assembly is used for driving the pre-cutting knife body to move inwards along the radial direction of the steel bar main body and rotate along with the steel bar main body;
The cutter mounting seat is in a ring shape, is arranged in the transmission sleeve and is movably connected with the transmission sleeve, the pre-cutter body is arranged on the cutter mounting seat and is in sliding connection with the cutter mounting seat along the radial direction, and the pre-cutter body and the cutter mounting seat synchronously rotate along with each other;
in the case of the precutting device in state one:
The transmission sleeve rotating along the axis drives the pre-cutter body to move inwards along the radial direction of the steel bar main body and simultaneously drives the pre-cutter body to rotationally cut the steel bar main body along the circumferential direction of the steel bar main body;
under the condition that the pre-cutting device is in a second state:
One end of the pre-cutter body, which is far away from the cutter edge, is abutted against the inner peripheral wall of the transmission sleeve.
Preferably, a plurality of cutter limiting sliding holes for installing the pre-cutter body are formed in the cutter installation seat; the pre-cutter body is arranged in the cutter limiting sliding hole and is in sliding connection with the cutter limiting sliding hole;
a spring mounting groove is formed in the pre-cutter body, a limit post positioned in the spring mounting groove is further formed in the cutter mounting seat, a reset spring is arranged in the spring mounting groove, one end of the reset spring is abutted with the limit post, the other end of the reset spring is abutted with the end of the spring mounting groove, and the reset spring is positioned on one side, away from the cutter edge of the pre-cutter body, of the limit post;
A push head oblique block for driving the pre-cutter body is fixed on the inner wall of the transmission sleeve; the push head inclined block is provided with a push head inclined surface with an included angle with the tangential direction of the transmission sleeve.
Preferably, the pre-cutting device further comprises a box body in sliding connection with the electric guide rail, and the pre-cutting driving assembly, the transmission sleeve and the cutter mounting seat are arranged in the box body and synchronously move with the box body;
the precut drive assembly includes: the device comprises a precutting motor and a precutting driving gear arranged on an output shaft of the precutting motor, wherein a precutting driven toothed ring meshed with the precutting driving gear is arranged on the peripheral wall of a transmission sleeve.
The invention has the beneficial effects that:
According to the application, the steel bar main body is extruded along the circumferential direction to force the steel bar main body to reduce the diameter, so that the tensile stress of the steel bar main body during reducing the diameter can be reduced, the sliding distance of a lattice in the length direction can be reduced, and the elongation rate of the steel bar main body after finishing processing can be improved compared with the conventional cold drawing and cold drawing reducing.
On the other hand, through cutting out the pre-cut on the steel bar main body, the internal stress can be fully released in the subsequent process of heating and releasing the internal stress, so that the extensibility of the steel bar main body after processing is improved.
Drawings
FIG. 1 is a schematic cross-sectional view of embodiment 1 of the present invention;
FIG. 2 is a schematic left-hand view of the reducing sleeve according to embodiment 2 of the present invention;
FIG. 3 is a schematic cross-sectional view of A-A of FIG. 2;
FIG. 4 is a schematic left-view diagram of embodiment 2 of the present invention;
FIG. 5 is a schematic top view of embodiment 2 of the present invention;
FIG. 6 is a schematic cross-sectional view of embodiment 3 of the present invention;
FIG. 7 is a schematic view showing the structure of a precutting device in embodiment 4 of the present invention;
FIG. 8 is a schematic cross-sectional view of the precutting device in embodiment 4 of the present invention;
FIG. 9 is a schematic cross-sectional view of the precutting device in embodiment 4 of the present invention;
fig. 10 is an exemplary diagram of embodiment 4 of the present invention.
Reference numerals illustrate:
The novel steel bar cutting machine comprises the following components of a 1-reducing sleeve, 11-first diameter-fixing sections, 12-second diameter-fixing sections, 13-reducing sections, 131-extrusion conical surfaces, 132-spiral extrusion wall surfaces, 133-spiral extrusion trapezoidal surfaces, 14-reducing driven toothed rings, 2-reducing motors, 21-reducing driving gears, 31-precutting motors, 311-precutting driving gears, 32-transmission sleeves, 321-precutting driven toothed rings, 322-push head inclined blocks, 33-cutter mounting seats, 331-cutter limiting sliding holes, 332-limiting columns, 34-precutting bodies, 341-cutter inclined surfaces, 342-spring mounting grooves, 35-reset springs, 36-boxes, 37-electric guide rails, 4-steel bar main bodies, 41-precutting grooves, 5-descaling devices, 6-rolling mill sets, 7-high-frequency induction heating cabinets and 8-flying shears.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but embodiments of the present invention are not limited thereto.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "rear", "top", "bottom", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present invention and for simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "configured," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The invention is described in detail below by reference to the attached drawings and in connection with the embodiments:
example 1:
As shown in fig. 1, the present embodiment provides a reducing apparatus for high-ductility cold-rolled ribbed steel bar, comprising a reducing sleeve 1 for being fitted over a steel bar main body 4, and a reducing driving assembly for driving the reducing sleeve 1 to rotate along its axis, wherein:
The reducing sleeve 1 comprises a first sizing section 11, a reducing section 13 and a second sizing section 12 which are distributed in sequence along the reinforcing bar body 4, the reducing section 13 having an extrusion structure for extruding the reinforcing bar body 4 in a circumferential direction to force it to reduce its diameter.
The design conception points of the application are as follows: the rotary reducing sleeve 1 is utilized to extrude the steel bar main body 4 in the rotating process, so that the extruding structure of the reducing section 13 continuously presses the steel bar main body 4 to reduce diameter and deform in the circumferential direction, compared with the cold drawing and cold drawing modes in the prior art, the tensile stress along the advancing direction of the steel bar main body 4 can be effectively reduced, the slippage of lattices of the steel bar main body 4 in the length direction in the reducing process is reduced, the excessive reduction of the plasticity and ductility of the steel bar main body 4 is avoided, the extensibility of the steel bar main body 4 after the processing is improved, in particular, the steel bar main body 4 continuously rotates in the circumferential direction to extrude the reducing through the extruding structure, and compared with the cold drawing and cold drawing modes in the prior art, a certain temperature rise is formed at the reducing position of the steel bar main body 4, so that the temperature at the reducing position is slightly higher than the cold drawing and cold drawing modes, the internal stress of a part can be released in advance after the reducing, and the extensibility of the steel bar main body 4 is improved.
In some preferred exemplary embodiments, the extrusion structure of the reducing section 13 is a conical extrusion cone 131.
In this embodiment, the diameter-reducing sleeve 1 is made of high-temperature-resistant cemented carbide.
In the present embodiment, the reducing drive assembly includes the reducing motor 2 and the reducing drive gear 21 provided at the output end of the reducing motor 2, the reducing sleeve 1 is provided with the reducing driven ring gear 14 meshed with the reducing drive gear 21, and the reducing motor 2 drives the reducing sleeve 1 to rotate along its axis through the reducing drive gear 21 and the reducing driven ring gear 14.
Example 2:
As shown in fig. 2 to 5, in the present embodiment, the extrusion structure of the reducing section 13 is a screw extrusion structure extending along an archimedes spiral line, and the screw extrusion structure includes a screw extrusion step surface 133 and a screw extrusion wall surface 132 for extruding the circumferential wall of the reinforcing steel bar body 4 and forcing the reinforcing steel bar body 4 to reduce the diameter;
Both the screw-type pressing wall surface 132 and the screw-type pressing step surface 133 have a spiral structure along archimedes.
In some preferred exemplary embodiments, the ratio between the width of the screw extrusion wall 132 and the screw extrusion tread 133 ranges from: 20 to 1. The smaller the ratio between the widths of the screw extrusion wall 132 and the screw extrusion step 133, the more intense the extrusion process, whereas the slower the extrusion, in this embodiment, the ratio between the widths of the screw extrusion wall 132 and the screw extrusion step 133 is 10, and in some embodiments, the ratio may be 8, 12/15, etc., which are not listed here.
In some preferred exemplary embodiments, the screw-type extrusion wall 132 is arranged parallel to the axis of the reduction sleeve 1. In this embodiment, the spiral extrusion wall 132 is parallel to the axis of the reducing sleeve 1, so that when the spiral extrusion wall 132 extrudes the reinforcing steel bar body 4, the extrusion direction is perpendicular to the axial direction of the reinforcing steel bar body 4, which can reduce the tensile stress of the reinforcing steel bar body 4 in the reducing process as much as possible, and reduce the slippage of the lattice inside the reinforcing steel bar body 4 in the length direction of the reinforcing steel bar body 4, thereby providing the elongation of the reinforcing steel bar.
In this embodiment, the diameter-reducing sleeve 1 is made of high-temperature-resistant cemented carbide.
The reducing drive assembly in this embodiment is the same as that of embodiment 1, and will not be described here again.
Example 3:
As shown in fig. 6, in this embodiment, an included angle a is formed between the spiral extrusion wall 132 and the axis of the reducing sleeve 1;
an included angle B is defined between a connecting line of one end, close to each other, of the first sizing section 11 and the second sizing section 12 and the axis of the reducing sleeve 1, the included angle A is smaller than the included angle B, and the included angle A is smaller than 30 degrees.
In this embodiment, the included angle a is formed between the axis of the spiral extrusion wall 132 and the axis of the reducing sleeve 1, and the included angle a is smaller than 30 °, so that the spiral extrusion wall 132 needs to maintain a certain tensile force when extruding the reinforcing steel bar main body 4 to reduce the diameter, and by installing the reducing sleeve 1 with different included angles a, the ratio of the tensile stress and the compressive stress of the reinforcing steel bar main body 4 in the reducing process can be changed, so that the extensibility of the reinforcing steel bar main body 4 after the production is completed is adjusted, and the use effect of the finished reinforcing steel bar is improved.
In this embodiment, the diameter-reducing sleeve 1 is made of high-temperature-resistant cemented carbide.
The reducing drive assembly in this embodiment is the same as that of embodiment 1, and will not be described here again.
Example 4:
On the basis of the above embodiment 1, embodiment 2 or embodiment 3, as shown in fig. 7 to 10, the present embodiment provides a production system of a high-ductility cold-rolled ribbed steel bar, comprising a reducing device of any one of the above embodiments, further comprising a descaling device 5, a rolling train 6, a heating device and a flying shear 8 sequentially arranged in a steel bar traveling direction, the reducing device being disposed between the descaling device 5 and the rolling train 6, and further comprising a precutting device disposed between the reducing device and the flying shear 8, the precutting device comprising a precutting blade 34 for cutting an annular precut slit 41 in a steel bar main body 4;
the precutting device comprises the following two states:
The first state, the pre-cutting knife 34 moves inwards along the radial direction of the steel bar main body 4 and simultaneously rotationally cuts the steel bar main body 4 along the circumferential direction of the steel bar main body 4, and the whole pre-cutting device moves synchronously with the steel bar main body 4 along the advancing direction of the steel bar main body 4;
and in the second state, a gap is reserved between the knife edge of the pre-cutting knife 34 and the steel bar main body 4, and the whole pre-cutting device resets along the direction opposite to the advancing direction of the steel bar main body 4.
In this embodiment, the pre-cutting device is disposed between the reducing device and the rolling mill set 6, where the rolling mill set 6 is an existing device, and can roll the steel bar main body 4 to form rib marks, and the heating device in this embodiment is a high-frequency electromagnetic heating cabinet in the existing device, which is not described herein.
Another idea of the application is that: through setting up precutting knife body 34, cutter mount pad 33, transmission sleeve 32, and precutting drive assembly, make precutting device can carry out precutting to reinforcing bar main part 4, form the annular precut joint 41 of perpendicular to reinforcing bar main part 4 axis, make reinforcing bar main part 4 in the in-process of follow-up by heating device heating release internal stress, can fully expand after being heated, so that internal stress fully releases, thereby improve the tensile properties of reinforcing bar main part 4, on the other hand, precut joint 41 can be when flying shear 8 cuts reinforcing bar main part 4, make reinforcing bar main part 4 cut off from precut joint 41, can make reinforcing bar main part 4's whole incision terminal surface more even, work load when later stage uses is reduced.
In some preferred example embodiments, as shown in fig. 8 and 9, the precutting device further comprises:
a transmission sleeve 32 for driving the pre-cutter body 34 to move radially inwards along the reinforcing steel bar main body 4 and rotate along with the transmission sleeve, and a pre-cutting driving assembly for driving the transmission sleeve 32 to rotate along the axis of the transmission sleeve;
the cutter mounting seat 33 is in a ring shape, the cutter mounting seat 33 is arranged in the transmission sleeve 32 and is movably connected with the transmission sleeve, the pre-cutter body 34 is arranged on the cutter mounting seat 33 and is in sliding connection with the cutter mounting seat along the radial direction, and the pre-cutter body 34 and the cutter mounting seat 33 synchronously rotate along with each other;
in the case of the precutting device in state one:
the transmission sleeve 32 rotating along the axis drives the pre-cutter body 34 to move inwards along the radial direction of the steel bar main body 4 and simultaneously drives the pre-cutter body 34 to rotationally cut the steel bar main body 4 along the circumferential direction of the steel bar main body 4;
under the condition that the pre-cutting device is in a second state:
The end of the pre-cutter body 34 remote from the knife edge abuts against the inner peripheral wall of the transmission sleeve 32. In some embodiments, a portion of the outer peripheral wall of the cutter mount 33 abuts against the inner peripheral wall of the drive sleeve 32.
In some preferred exemplary embodiments, a plurality of cutter limiting sliding holes 331 for mounting the pre-cutter body 34 are provided in the cutter mounting seat 33; the pre-cutter body 34 is arranged in the cutter limiting slide hole 331 and is in sliding connection with the cutter limiting slide hole;
A spring mounting groove 342 is formed in the pre-cutter body 34, the cutter mounting seat 33 is further provided with a limit post 332 positioned in the spring mounting groove 342, a return spring 35 is arranged in the spring mounting groove 342, one end of the return spring 35 is abutted with the limit post 332, the other end of the return spring 35 is abutted with the end of the spring mounting groove 342, and the return spring 35 is positioned on one side, far away from the cutter edge of the pre-cutter body 34, of the limit post 332;
A push head oblique block 322 for driving the pre-cutter body 34 is fixed on the inner wall of the transmission sleeve 32; the pusher bevel block 322 has a pusher bevel that is angled with respect to the tangential direction of the drive sleeve 32. The included angle between the pusher bevel and the tangential direction of the drive sleeve 32 ranges from: 30 ° to 60 °. In this embodiment, the angle between the bevel of the pusher and the tangential direction of the driving sleeve 32 is 30 °, and in some embodiments, the angle may be 45 ° or 60 °. In this embodiment, the number of the push head inclined blocks 322 is the same as that of the pre-cutting cutter 34, and the plurality of push head inclined blocks 322 are uniformly distributed along the circumferential direction of the transmission sleeve 32, and the distance between one end of the push head inclined block 322 away from the inner circumferential wall of the transmission sleeve 32 and the inner circumferential wall of the transmission sleeve 32 is the depth of the annular pre-cutting slit 41.
In this embodiment, the number of the cutter limiting sliding holes 331 is 4, the number of the pre-cutter 34 is 4, and in some embodiments, the number of the pre-cutter 34 and the cutter limiting sliding holes 331 may be 1, 2, 3, 5, etc., which are not enumerated here.
In some preferred exemplary embodiments, the pre-cutting device further comprises a box 36 slidably connected to a motorized guide rail 37, and the pre-cutting driving assembly, the transmission sleeve 32 and the cutter mounting seat 33 are disposed in the box 36 and move synchronously therewith;
the precut drive assembly includes: the pre-cutting motor 31 and the pre-cutting drive gear 311 that sets up on the output shaft of pre-cutting motor 31, be provided with on the outer peripheral wall of transmission sleeve 32 with the driven ring gear 321 of pre-cutting that the meshing of pre-cutting drive gear 311 was followed.
In this embodiment, the electric guide 37 is disposed parallel to the traveling direction of the reinforcing bar main body 4, and the precutting device is synchronously moved along the traveling direction of the reinforcing bar main body 4 by the electric guide 37. The pre-cutting device is reciprocally moved in parallel to the traveling direction of the reinforcing bar main body 4 by the electric guide rail 37 as in the prior art, and is not described here. In addition, in the present embodiment, the precut motor 31 drives the transmission sleeve 32 to rotate along its axis through the precut driving gear 311 and the precut driven gear ring 321.
In this embodiment, when the precutting device is in the first state of cutting the reinforcement bar main body 4, the precutting motor 31 drives the transmission sleeve 32 to rotate through the precutting driving gear 311, and as the pushing head inclined block 322 is disposed on the inner peripheral wall of the transmission sleeve 32, the pushing head inclined block 322 pushes the precutting knife 34 to move radially inwards in the process of rotating along with the transmission sleeve 32, and the precutting knife 34 rotates along with the pushing head inclined block 322 to cut the reinforcement bar main body 4, at this time, as shown in fig. 9, at the same time, the whole precutting device moves synchronously with the reinforcement bar main body 4 along with the travelling direction of the reinforcement bar under the action of the electric guide rail 37 until the precutting knife 34 is in the maximum state with the precutting slit 41 on the reinforcement bar main body 4 after the precutting knife 322 is abutted against one end far away from the inner peripheral wall of the transmission sleeve 32, and as the precutting knife 41 is continuously rotated along with the transmission sleeve 32, at this time, the precutting knife 34 is reset along with the precutting knife 34 under the action of the reset spring 35, until the precutting knife 34 slides radially outwards, and the precutting knife 34 is reset until the precutting knife 34 is finished.
It is to be understood that the above embodiments are merely illustrative of the application of the principles of the present invention, but not in limitation thereof. Various modifications and improvements may be made by those skilled in the art without departing from the spirit and substance of the invention, and are also considered to be within the scope of the invention.
Claims (6)
1. The production system of the high-ductility cold-rolled ribbed steel bar comprises a reducing device, a descaling device (5), a rolling mill set (6), a heating device and a flying shear (8) which are sequentially arranged along the travelling direction of the steel bar, and is characterized in that the reducing device is arranged between the descaling device (5) and the rolling mill set (6), and further comprises a pre-cutting device arranged between the reducing device and the flying shear (8), wherein the pre-cutting device comprises a pre-cutting cutter body (34) for cutting an annular pre-cutting slit (41) on a steel bar main body (4);
the precutting device comprises the following two states:
The first state is that the pre-cutting knife body (34) moves inwards along the radial direction of the steel bar main body (4) and simultaneously rotationally cuts the steel bar main body (4) along the circumferential direction of the steel bar main body (4), and the whole pre-cutting device moves synchronously with the steel bar main body (4) along the advancing direction of the steel bar main body (4);
A gap is reserved between the knife edge of the pre-cutting knife body (34) and the steel bar main body (4), and the whole pre-cutting device resets along the opposite direction of the advancing direction of the steel bar main body (4);
the reducing device comprises a reducing sleeve (1) which is used for being sleeved on a reinforcing steel bar main body (4), and a reducing driving assembly which is used for driving the reducing sleeve (1) to rotate along the axis of the reducing sleeve, wherein:
The reducing sleeve (1) comprises a first sizing section (11), a reducing section (13) and a second sizing section (12) which are sequentially distributed along the steel bar main body (4), wherein the reducing section (13) is provided with an extrusion structure for extruding the steel bar main body (4) along the circumferential direction to force the steel bar main body to reduce the diameter;
the precutting device further comprises:
A transmission sleeve (32) for driving the pre-cutter body (34) to move inwards along the radial direction of the reinforcing steel bar main body (4) and rotate along with the transmission sleeve, and a pre-cutting driving assembly for driving the transmission sleeve (32) to rotate along the axis of the transmission sleeve;
The cutter mounting seat (33) is in a ring shape, the cutter mounting seat (33) is arranged in the transmission sleeve (32) and is movably connected with the transmission sleeve, the pre-cutter body (34) is arranged on the cutter mounting seat (33) and is in sliding connection with the cutter mounting seat along the radial direction, and the pre-cutter body (34) and the cutter mounting seat (33) synchronously rotate along with each other;
in the case of the precutting device in state one:
The transmission sleeve (32) rotating along the axis drives the pre-cutter body (34) to move inwards along the radial direction of the steel bar main body (4) and simultaneously drives the pre-cutter body (34) to rotationally cut the steel bar main body (4) along the circumferential direction of the steel bar main body (4);
under the condition that the pre-cutting device is in a second state:
one end of the pre-cutter body (34) far away from the cutter edge is abutted against the inner peripheral wall of the transmission sleeve (32);
a plurality of cutter limiting sliding holes (331) for installing the pre-cutter body (34) are formed in the cutter installation seat (33); the pre-cutter body (34) is arranged in the cutter limiting slide hole (331) and is in sliding connection with the cutter limiting slide hole;
A spring mounting groove (342) is formed in the pre-cutter body (34), a limit post (332) positioned in the spring mounting groove (342) is further arranged on the cutter mounting seat (33), a return spring (35) is arranged in the spring mounting groove (342), one end of the return spring (35) is abutted with the limit post (332), the other end of the return spring is abutted with the end of the spring mounting groove (342), and the return spring (35) is positioned on one side, far away from the edge of the pre-cutter body (34), of the limit post (332);
a push head oblique block (322) for driving the pre-cutter body (34) is fixed on the inner wall of the transmission sleeve (32); the push head inclined block (322) is provided with a push head inclined plane which forms an included angle with the tangential direction of the transmission sleeve (32);
The pre-cutting device further comprises a box body (36) which is in sliding connection with the electric guide rail (37), and the pre-cutting driving assembly, the transmission sleeve (32) and the cutter mounting seat (33) are arranged in the box body (36) and synchronously move with the box body;
The precut drive assembly includes: the device comprises a pre-cutting motor (31) and a pre-cutting driving gear (311) arranged on an output shaft of the pre-cutting motor (31), wherein a pre-cutting driven toothed ring (321) meshed with the pre-cutting driving gear (311) is arranged on the peripheral wall of a transmission sleeve (32).
2. A production system of high-ductility cold-rolled ribbed steel bar according to claim 1, characterized in that the extrusion structure of the reducing section (13) is a screw extrusion structure extending along an archimedes screw line, the screw extrusion structure comprising a screw extrusion tread (133) and a screw extrusion wall (132) for extruding the circumferential wall of the steel bar body (4) and forcing the steel bar body (4) to reduce the diameter;
The spiral extrusion wall surface (132) and the spiral extrusion ladder surface (133) are both in an Archimedes spiral structure.
3. The system for producing high-ductility cold-rolled ribbed steel bar according to claim 2, characterized in that the ratio between the width of the screw extrusion wall (132) and the width of the screw extrusion tread (133) ranges from: 20 to 1.
4.A production system for high-ductility cold-rolled ribbed steel bar according to claim 2, characterized in that the screw-type extrusion wall (132) is arranged parallel to the axis of the reducing sleeve (1).
5. The production system of high-ductility cold-rolled ribbed steel bar according to claim 2, characterized in that the screw-type extrusion wall (132) has an angle a with the axis of the reducing sleeve (1);
an included angle B is defined between a connecting line of one end, close to each other, of the first sizing section (11) and the second sizing section (12) and the axis of the reducing sleeve (1), the included angle A is smaller than the included angle B, and the included angle A is smaller than 30 degrees.
6. The production system of a high-ductility cold-rolled ribbed steel bar according to claim 1, characterized in that the extrusion structure of the reducing section (13) is a conical extrusion cone (131).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311704281.4A CN117564123B (en) | 2023-12-13 | 2023-12-13 | Reducing device and production system of high-ductility cold-rolled ribbed steel bar |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311704281.4A CN117564123B (en) | 2023-12-13 | 2023-12-13 | Reducing device and production system of high-ductility cold-rolled ribbed steel bar |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111842517A (en) * | 2020-07-24 | 2020-10-30 | 浙江久立特材科技股份有限公司 | Cold drawing die for ribbed cladding tube, production process and finished tube thereof |
| CN115488147A (en) * | 2022-09-15 | 2022-12-20 | 马鞍山延隆新材料科技有限公司 | Multi-pass low-temperature rolling method for high-ductility cold-rolled ribbed steel bar |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1243048A (en) * | 1958-10-07 | 1960-10-07 | Canada Steel Co | Die for drawing wire of non-circular cross section |
| CN208929032U (en) * | 2018-10-22 | 2019-06-04 | 重庆奇甫机械有限责任公司 | Half grout sleeve threaded ends squeeze closing-in mould |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111842517A (en) * | 2020-07-24 | 2020-10-30 | 浙江久立特材科技股份有限公司 | Cold drawing die for ribbed cladding tube, production process and finished tube thereof |
| CN115488147A (en) * | 2022-09-15 | 2022-12-20 | 马鞍山延隆新材料科技有限公司 | Multi-pass low-temperature rolling method for high-ductility cold-rolled ribbed steel bar |
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