Material pulling mechanism of wire rod stretching forming machine

By introducing a limiting block and baffle buffer structure into the feeding mechanism of the wire stretching forming machine, combined with the design of a cleaning brush, the problems of impact and dust adhesion during movement are solved, resulting in a more stable and durable stretching process.

CN223902629UActive Publication Date: 2026-02-13WUYI ZHENGDA METAL WIRE PROD CO LTD
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Patent Information

Application Number
CN202520550465.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-03-26
Publication Date
2026-02-13
Estimated Expiration
2035-03-26

AI Technical Summary

Technical Problem

The existing wire drawing forming machine's pulling mechanism is prone to impact with the base due to inertia during movement, causing the wire to break. In addition, dust easily accumulates on the lead screw, leading to wear and shortening its service life.

Method used

A buffer structure combining limit blocks and baffles is adopted to prevent the moving block from colliding with the worktable. At the same time, a cleaning brush is set to clean and lubricate the lead screw to prevent dust from adhering.

Benefits of technology

It improves the stability of the feeding mechanism, avoids wire breakage and lead screw wear, and extends the service life of the equipment.

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Abstract

The utility model discloses a material pulling mechanism of a wire rod stretching forming machine, which comprises a workbench, a clamping assembly and a screw rod moving assembly, the workbench surface is provided with a mounting groove, a rotating screw rod is arranged in the groove, and the side wall is provided with a driving device; the moving block is slidably mounted in the mounting groove and is in threaded connection with the lead screw, first limiting blocks are arranged on the two sides of the moving block and are in sliding fit with the first limiting grooves in the groove wall, the top of the moving block is connected with the clamping assembly through a mounting plate, a baffle and a spring are arranged at the two ends of the two limiting grooves respectively, and the two ends of the spring are connected with the baffle and the groove wall respectively and used for buffering impact. The material pulling mechanism has the advantages that the problem that the moving block collides with the working table can be avoided, the stability of the material pulling mechanism during working is guaranteed, and dust attached to the lead screw can be cleaned at the same time.
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Description

TECHNICAL FIELD

[0001] The utility model relates to a material pulling mechanism of forming machine especially to a material pulling mechanism of wire rod stretch forming machine. BACKGROUND

[0002] The material pulling mechanism of wire rod stretch forming machine is one of the core parts of the equipment, mainly responsible for pulling the wire rod and controlling the stretch forming process.

[0003] In the prior art, such as the wire rod stretching device for wire rod production disclosed in the publication No. CN220329614U, the stretching mechanism is provided, the cooperation of the motor and the threaded rod A makes the moving plate automatically move the other end of the wire rod to the left, thereby quickly stretching it, which is simple and fast, fully automated, time-saving, labor-saving and labor-saving, improves the work efficiency, greatly improves the stretching efficiency and effect.

[0004] However, it still has some shortcomings, such as the stretching mechanism in the prior art, which is controlled by the lead screw moving mechanism arranged on the base to move reciprocally on the base, but when the stretching mechanism moves on the base, the moving plate in the stretching mechanism is easy to collide with the base due to inertia, and if the stretching mechanism collides with the base when stretching the wire rod, the stretched wire rod is easy to break due to the instability of the stretching mechanism, and at the same time, the lead screw moving mechanism is easy to attach dust on the lead screw after long time use, if the attached dust is not cleaned, the lead screw and the moving plate are easy to wear when the moving plate moves on the lead screw, which shortens the service life of the lead screw moving mechanism. UTILITY MODEL CONTENT

[0005] The utility model solves the technical problem of providing a material pulling mechanism of wire rod stretch forming machine with high stability when moving.

[0006] The utility model discloses a technical scheme that solves the above technical problem is adopted: the material drawing mechanism of wire rod stretch forming machine, including work table and install on the work table for the clamping assembly of wire rod is clamped, be provided with the screw rod moving component of control clamping assembly reciprocating movement on the work table in the work table, the screw rod moving component includes, install the groove, install the groove is set up on the upper surface of work table, be provided with a screw rod in the rotation of install the groove, the sidewall of work table is provided with a drive arrangement for controlling the rotation of screw rod, moving block, moving block is installed in install the groove and slides, moving block is with screw joint, moving block is provided with a first limit block on the two side walls close to install the groove, the groove wall of install the groove is seted up with the first limit groove that is matched with first limit block, first limit block and first limit groove are connected with sliding, the top of moving plate is provided with mounting plate, and mounting plate is connected with clamping assembly, baffle, the baffle is equipped with not less than four, four baffle is installed in the left and right two ends of two first limit groove and slides, spring, the spring is equipped with not less than four, four spring is installed in the left and right two ends of two first limit groove, one end of spring is connected with baffle, the other end of spring is connected with the groove wall of first limit groove, cleaning brush, the cleaning brush is equipped with two, the cleaning brush is all set up in the cylinder, two cleaning brush is connected with the sidewall of the left and right two ends of moving block, the cleaning brush is all set up on screw rod, the inner wall of cleaning brush is evenly provided with a plurality of bristles, and the bristle is in the abutment of the outer wall of screw rod away from cleaning cylinder one end.

[0007] The utility model further provides a preferred scheme: the cleaning brush includes brush body, the inside of brush body is hollow, and the brush body is connected with moving block, and the bristle is installed on the brush body, and the bristle is in the abututement of the inside of brush body with storage liquid in one end connected with brush body, and the filling port is installed on the outer wall of brush body, and the filling port is communicated with the inside of brush body, and the top of filling port is provided with a cover, and the cover is detachably connected with filling port.

[0008] The utility model further provides a preferred scheme: the clamping assembly includes installation box, and the installation box is installed on mounting plate, and the sidewall of installation box is seted up with the through -hole of the line material in the installation box, and the sidewall of installation box is seted up with the movable door in the one end away from through -hole, and the telescopic device is equipped with not less than two, and two telescopic devices are symmetrically installed on the inner wall of installation box, and the clamping block is equipped with not less than two, and the clamping block is all set up in the semicircle, and the outer wall of two clamping blocks is connected with the telescopic end of two telescopic devices respectively, and two telescopic devices are used for controlling two clamping blocks in installation box and moving away from each other.

[0009] The further preferred embodiment of the utility model further provides: the top and bottom of first limit groove are equipped with one second limit groove, the top and bottom of baffle are equipped with one second limit block, second limit block and second limit groove slidingly connect.

[0010] The further preferred embodiment of the utility model further provides: the installation box is provided with a fixed cylinder on one side wall with a through hole, the inside of the fixed cylinder is coaxially arranged with the through hole, and a plurality of pressing mechanisms are uniformly arranged on the inner wall of the fixed cylinder.

[0011] The further preferred embodiment of the utility model further provides: the inner wall of the clamping block is provided with a semicircular elastic abutment plate, the inner wall of the elastic abutment plate faces the inner wall of the clamping block, a spring telescopic rod is arranged on the inner wall of the clamping block, and the telescopic end of the spring telescopic rod is connected with the inner wall of the elastic abutment plate.

[0012] The further preferred embodiment of the utility model further provides: the pressing mechanism comprises a mounting seat, the mounting seat is mounted in the fixed cylinder in the axial direction of the inner wall of the fixed cylinder, a connecting groove is formed in the mounting seat away from the fixed cylinder, the connecting groove is provided with an opening at one end away from the through hole, the connecting groove is provided with a chamfer on the side wall close to the through hole, and a connecting shaft is arranged in the connecting groove.

[0013] The further preferred embodiment of the utility model further provides: the bottom of the pressing block is chamfered at one end away from the through hole.

[0014] Compared with the prior art, the utility model has the advantages that when the first limit block moves in the first limit groove, as the first limit block approaches the end of the first limit groove, the first limit block can push the baffle to compress the spring connected with the baffle, so that the impact force when the moving block moves can be buffered, thereby avoiding the problem of impact between the moving block and the workbench, and further ensuring the stability of the material pulling mechanism during work. BRIEF DESCRIPTION OF DRAWINGS

[0015] The present application will be described in further detail below in conjunction with the accompanying drawings and preferred embodiments, but those skilled in the art will appreciate that the drawings are only for the purpose of explaining the preferred embodiments and therefore should not be taken as limiting the scope of the present application. In addition, unless specifically indicated otherwise, the drawings only schematically represent the composition or configuration of the described objects and can include exaggerated displays, and the drawings are not necessarily drawn to scale.

[0016] Figure 1 is a front view of the present application;

[0017] Figure 2 is a top view of the present application;

[0018] Figure 3 is a three-dimensional structural schematic view of the present application;

[0019] Figure 4 is an isometric three-dimensional structural schematic view of the present application;

[0020] Figure 5 is a front view of the cleaning brush in the present application;

[0021] Figure 6 is a three-dimensional structural schematic view of the cleaning brush in the present application;

[0022] Figure 7 is a sectional view of the cleaning brush in the present application;

[0023] Figure 8 is a structural schematic view of the installation box when the movable door is opened in the present application;

[0024] Figure 9 is a three-dimensional structural schematic view of the installation box when the movable door is opened in the present application;

[0025] Figure 10 is an isometric three-dimensional structural schematic view of the installation box when the movable door is opened in the present application;

[0026] Figure 11 is a sectional view of the installation box and the fixed cylinder in the present application;

[0027] Figure 12 is a three-dimensional structural schematic view of the telescopic device, the clamping block and the elastic abutting plate when connected in the present application;

[0028] Figure 13 is a three-dimensional structural schematic view of the pressing mechanism in the present application;

[0029] Figure 14 is a sectional view of the pressing mechanism in the present application.

[0030] In the diagram: 1. Workbench; 2. Clamping assembly; 21. Mounting box; 22. Movable door; 23. Fixed cylinder; 231. Clamping mechanism; 2311. Mounting base; 2312. Connecting groove; 2313. Pressure block; 2314. Connecting shaft; 24. Telescopic device; 241. Clamping block; 242. Elastic abutment plate; 243. Spring telescopic rod; 25. Through hole; 3. Lead screw moving assembly; 31. Mounting groove; 32. Lead screw; 33. Drive device; 34. Moving block; 341. First limiting block; 35. Cleaning brush; 351. Brush body; 352. Brush bristles; 353. Filling port; 354. Cap; 355. Liquid storage; 36. First limiting groove; 361. Second limiting groove; 37. Mounting plate; 38. Baffle; 381. Second limiting block; 39. Spring. Detailed Implementation

[0031] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0032] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

[0033] This embodiment mainly describes the structure of the drawing mechanism of the wire drawing forming machine, as follows:

[0034] like Figures 1-14 As shown, the wire drawing mechanism of the wire drawing machine includes a worktable 1 and a clamping assembly 2 installed on the worktable 1 for clamping the wire. At the same time, a screw moving assembly 3 is provided in the worktable 1 to control the reciprocating movement of the clamping assembly 2 on the worktable 1.

[0035] The screw rod moving assembly 3 comprises a mounting groove 31 opened on the upper surface of the workbench 1, a screw rod 32 rotating in the mounting groove 31, and a driving device 33 installed on the side wall of the workbench 1 for controlling the rotation of the screw rod 32, and a moving block 34 provided with a screw joint with the screw rod 32 and sliding in the mounting groove 31, and a first limiting block 341 provided on each of the two side walls of the mounting groove 31 close to the moving block 34, and a first limiting groove 36 opened on the groove wall of the mounting groove 31 and matched with the first limiting block 341, and the first limiting block 341 and the first limiting groove 36 are in sliding connection, and then an installation plate 37 is provided on the top of the moving plate for connecting with the clamping assembly 2, so that when the screw rod moving assembly 3 is working, the driving device 33 is started to drive the screw rod 32 to rotate in the mounting groove 31, and the moving block 34 screw-jointed with the screw rod 32 can move in the mounting groove 31 through the cooperation of the first limiting block 341 and the first limiting groove 36, and the clamping assembly 2 connected with the moving block 34 through the installation plate 37 also moves, and since the clamping assembly 2 needs to reciprocate on the workbench 1, the driving device 33 is a bidirectional driving motor, and two screw rod moving assemblies 3 are provided on the workbench 1 to ensure that the clamping assembly 2 can move better on the workbench 1.

[0036] In order to avoid the problem of the moving block 34 colliding with the workbench 1 when moving, a baffle 38 is provided on the left and right ends of the two first limiting grooves 36, and a spring 39 is provided between the baffle 38 and the first limiting groove 36, one end of the spring 39 is connected with the baffle 38 and the other end is connected with the groove wall of the first limiting groove 36, when the first limiting block 341 moves in the first limiting groove 36, as the first limiting block 341 approaches the end of the first limiting groove 36, the first limiting block 341 can push the baffle 38 to compress the spring 39 connected with the baffle 38, so as to buffer the impact force when the moving block 34 moves, thereby avoiding the problem of the moving block 34 colliding with the workbench 1, and further ensuring the stability of the material pulling mechanism when working.

[0037] In order to ensure the stability of the baffle 38 when moving in the first limiting groove 36, a second limiting groove 361 is opened on the top and bottom of the first limiting groove 36, and a second limiting block 381 is provided on the top and bottom of the baffle 38, and the second limiting block 381 and the second limiting groove 361 are in sliding connection.

[0038] Meanwhile, in order to facilitate the cleaning of dust on the screw rod 32, a cleaning brush 35 in the form of a cylinder is arranged on the side wall of the moving block 34 at both ends, and the cleaning brush 35 is sleeved with the screw rod 32, and then a plurality of bristles 352 are uniformly arranged on the inner wall of the cleaning brush 35, and the bristles 352 are in abutment with the outer wall of the screw rod 32 at the end away from the cleaning cylinder. In this way, when the moving block 34 moves, the cleaning brush 35 can also move. In this way, when the cleaning brush 35 moves, the bristles 352 on the inner wall of the cleaning brush 35 can clean the surface of the screw rod 32, thereby avoiding the attachment of dust on the surface of the screw rod 32, and further avoiding the wear problem caused by dust when the moving block 34 moves on the screw rod 32. In this way, the service life of the screw rod moving assembly 3 is prolonged.

[0039] Further, in order to facilitate the application of lubricating oil to the screw rod 32, the cleaning brush 35 includes a brush body 351 which is internally hollow, and the brush body 351 is connected with the moving block 34, and the bristles 352 are also installed on the brush body 351. Then a liquid storage body 355 for storing lubricating oil is arranged in the brush body 351, and the bristles 352 are in abutment with the liquid storage body 355 at the end connected with the brush body 351. In order to facilitate the addition of lubricating oil to the brush body 351, a filling port 353 communicating with the inside of the brush body 351 is arranged on the outer wall of the brush body 351, and finally a cover 354 is arranged on the top of the filling port 353 and is connected with the filling port 353 by threads. The liquid storage body 355 is made of a sponge block;

[0040] When applying lubricating oil to the screw rod 32, first, the cover 354 is unscrewed and lubricating oil is added to the brush body 351 through the filling port 353 until the liquid storage body 355 made of a sponge block is soaked with lubricating oil. Since the bristles 352 are in abutment with the liquid storage body 355 at the end connected with the brush body 351, the bristles 352 will also be soaked with lubricating oil. In this way, when the cleaning brush 35 cleans the screw rod 32, it can also apply lubricating oil to the surface of the screw rod 32, thereby facilitating the application of lubricating oil to the screw rod 32. The liquid storage body 355 made of a sponge block can improve the stability of the lubricating oil in the brush body 351.

[0041] The clamping assembly 2 comprises a mounting box 21 mounted on the mounting plate 37, and a through hole 25 is formed in the side wall of the mounting box 21 for the wire to extend into the mounting box 21, and a movable door 22 is arranged on the side wall of the mounting box 21 away from the through hole 25, and then two telescopic devices 24 are symmetrically arranged on the inner walls of the mounting box 21 on both sides, and a semicircular clamping block 241 is arranged at the telescopic end of each telescopic device 24, wherein the outer wall of the clamping block 241 is connected with the telescopic end of the telescopic device 24, and the telescopic device 24 controls the movement of the clamping blocks 241 towards or away from each other in the mounting box 21 by elongation or shortening, so that when the clamping assembly 2 fixes the wire to be stretched, first, the wire to be stretched is inserted into the mounting box 21 through the through hole 25, and the wire to be stretched is located between the clamping blocks 241, then the telescopic device 24 is started to elongate the telescopic end of the telescopic device 24, and as the telescopic end of the telescopic device 24 is elongated, the clamping blocks 241 mounted on the telescopic end of the telescopic device 24 move towards each other until the wire to be stretched is tightly fixed, and the movable door 22 facilitates cleaning and maintenance of the inside of the mounting box 21.

[0042] In order to improve the clamping effect of the clamping block 241 on the wire, a semicircular elastic abutting plate 242 is arranged on the inner wall of the clamping block 241, and the inner wall of the elastic abutting plate 242 faces the inner wall of the clamping block 241, and a spring telescopic rod 243 is arranged on the inner wall of the clamping block 241, and the telescopic end of the spring telescopic rod 243 is connected with the inner wall of the elastic abutting plate 242.

[0043] Further, in order to further improve the fixing effect of the wire to be stretched, a fixed cylinder 23 is arranged on the side wall of the mounting box 21 coaxially with the through hole 25, and a plurality of pressing mechanisms 231 are uniformly arranged on the inner wall of the fixed cylinder 23, so that when the wire to be stretched is inserted into the mounting box 21 through the through hole 25 and clamped and fixed, first, the wire to be stretched is inserted into the fixed cylinder 23, and then the wire to be stretched is clamped and fixed by the clamping blocks 241 in the mounting box 21 after passing through the fixed cylinder 23, and the wire in the fixed cylinder 23 is pressed and fixed by the pressing mechanisms 231, so as to further improve the fixing effect of the wire to be stretched;

[0044] The pressing mechanism 231 comprises a mounting seat 2311 axially mounted in the fixed cylinder 23 along the inner wall of the fixed cylinder 23, a connecting groove 2312 is formed on the side of the mounting seat 2311 away from the fixed cylinder 23, the connecting groove 2312 is provided with an opening at the end away from the through hole 25, and the side wall of the connecting groove 2312 close to the through hole 25 is chamfered, a connecting shaft 2314 is arranged in the connecting groove 2312, and a pressing block 2313 is arranged in the connecting groove 2312, and the top of the pressing block 2313 is rotationally connected with the connecting shaft 2314 in the connecting groove 2312, so that when the wire to be stretched is inserted into the fixed cylinder 23, the outer wall of the wire to be stretched abuts against the bottom of the pressing block 2313, and the bottom of the pressing block 2313 is rotated towards the through hole 25 with the insertion of the wire to be stretched, until the clamping block 241 in the mounting box 21 clamps and fixes the wire, if the wire to be stretched is externally fixed and pulled, the clamping block 241 in the mounting box 21 clamps and fixes the wire, and the pressing block 2313 also abuts against the surface of the wire to be stretched, so that the fixing effect of the wire to be stretched is further improved, and if the wire to be stretched is taken out of the fixed cylinder 23, the clamping block 241 is no longer clamped, and then the movable door 22 on the mounting box 21 is opened to take out the wire from the mounting box 21.

[0045] Further, in order to improve the abutting effect of the pressing block 2313 and the surface of the wire, the end of the bottom of the pressing block 2313 away from the through hole 25 is chamfered, so that the contact area of the pressing block 2313 and the surface of the wire is increased, and the abutting effect of the pressing block 2313 and the surface of the wire is improved.

[0046] In the description of the utility model, it should be explained that the terms "upper", "lower", "front", "rear", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the utility model product is used, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, therefore it cannot be understood as a limitation on the utility model.

[0047] The wire stretching mechanism of the wire stretching forming machine provided by the utility model is described in detail above, the principle and implementation mode of the utility model are described by applying specific examples in this paper, and the description of the above examples is only used to help understand the utility model and the core idea. It should be pointed out that for ordinary skilled persons in the technical field, without departing from the principle of the utility model, the utility model can be improved and modified in many ways, and these improvements and modifications also fall within the protection scope of the claims of the utility model.

Claims

1. A wire drawing mechanism for a wire drawing forming machine, comprising a worktable and a clamping assembly mounted on the worktable for clamping the wire, wherein the worktable is provided with a lead screw moving assembly for controlling the reciprocating movement of the clamping assembly on the worktable, characterized in that: The screw rod moving assembly comprises: A mounting groove is formed in the upper surface of the workbench, and a screw rod is arranged in the mounting groove and rotates, and a driving device for controlling the rotation of the screw rod is arranged on the side wall of the workbench; A moving block is slidably arranged in the mounting groove and is screwed with the screw rod, and a first limiting block is arranged on each of the two side walls of the moving block close to the mounting groove, and a first limiting groove matched with the first limiting block is formed in the groove wall of the mounting groove, and the first limiting block is slidably connected with the first limiting groove, and an installation plate is arranged on the top of the moving block and is connected with the clamping assembly; Four baffle plates are arranged, and the four baffle plates are slidably arranged at the left and right ends of the two first limiting grooves respectively; Four springs are arranged, and the four springs are arranged at the left and right ends of the two first limiting grooves respectively, one end of the spring is connected with the baffle plate, and the other end of the spring is connected with the groove wall of the first limiting groove; Two cleaning brushes are arranged, the two cleaning brushes are both in a cylindrical shape, the two cleaning brushes are connected with the side walls at the left and right ends of the moving block respectively, the cleaning brushes are both sleeved on the screw rod, and a plurality of bristles are uniformly arranged on the inner wall of the cleaning brush, and the bristles are in abutment with the outer wall of the screw rod at the end away from the cleaning cylinder.

2. The draw mechanism of a wire stretch-forming machine according to claim 1, wherein: The cleaning brush comprises A brush body is arranged in a hollow manner, the brush body is connected with the moving block, and the bristles are arranged on the brush body; A liquid storage body is arranged in the brush body, and the bristles are in abutment with the liquid storage body at the end connected with the brush body and penetrating into the interior of the brush body; A filling port is arranged on the outer wall of the brush body, the filling port is in communication with the interior of the brush body, a cover is arranged on the top of the filling port, and the cover is detachably connected with the filling port.

3. The draw mechanism of a wire stretch-forming machine according to claim 1, wherein: The clamping assembly comprises An installation box is arranged on the installation plate, a through hole is formed in the side wall of the installation box for the wire rod to extend into the installation box, and a movable door is arranged on the side wall of the installation box away from the through hole; At least two telescopic devices are arranged on the inner wall of the installation box; At least two clamping blocks are arranged, the clamping blocks are both in a semicircular shape, the outer walls of the two clamping blocks are connected with the telescopic ends of the two telescopic devices respectively, and the two telescopic devices are used for controlling the two clamping blocks to move close to or away from each other in the installation box.

4. The draw mechanism of a wire stretch-forming machine according to claim 1, wherein: A second limiting groove is formed in the top and the bottom of the first limiting groove, and a second limiting block is arranged on the top and the bottom of the baffle plate, and the second limiting block is slidably connected with the second limiting groove.

5. The draw mechanism of a wire stretch-forming machine according to claim 3, wherein: A fixing cylinder is arranged on the side wall of the installation box provided with the through hole, the interior of the fixing cylinder is coaxially arranged with the through hole, and a plurality of pressing mechanisms are uniformly arranged on the inner wall of the fixing cylinder.

6. The draw mechanism of a wire stretch-forming machine according to claim 3, wherein: The inner wall of the clamping block is provided with a semicircular elastic abutting plate, the inner wall of the elastic abutting plate faces the inner wall of the clamping block, the inner wall of the clamping block is provided with a spring telescopic rod, and the telescopic end of the spring telescopic rod is connected with the inner wall of the elastic abutting plate.

7. The draw mechanism of a wire stretch-forming machine according to claim 5, wherein: The pressing mechanism comprises A mounting seat is mounted in the fixing cylinder along the inner wall of the fixing cylinder in the axial direction, a connecting groove is formed in the mounting seat on the side away from the fixing cylinder, the connecting groove is provided with an opening at the end away from the through hole, the side wall of the connecting groove close to the through hole is provided with a chamfer, and a connecting shaft is arranged in the connecting groove. A pressing block is mounted in the connecting groove, and the top of the pressing block is rotationally connected with the connecting shaft in the connecting groove.

8. The draw mechanism of a wire stretch-forming machine according to claim 7, wherein: The bottom of the pressing block is chamfered at the end away from the through hole.

Citation Information

Patent Citations

  • Wire stretching device for wire production

    CN220329614U