Bending and driving device for metal split pin and processing method thereof

Abstract

The application relates to the technical field of metal split pin production equipment, in particular to a metal split pin bending and buckling device and a processing method thereof. The metal split pin bending and buckling device comprises a cabinet, a work station plate, a winding mechanism and a pressing and shaping mechanism arranged on the cabinet, the winding mechanism can convey a wire to the work station plate, the pressing and shaping mechanism can shape the wire on the work station plate, a longitudinal support is further arranged on the cabinet and is arranged between the winding mechanism and the work station plate, a clamping assembly and a cutting assembly are installed on the longitudinal support, the clamping assembly can clamp and fix the left and right sides of the wire cutting point, a trigger is arranged on the pressing and shaping mechanism, during the downward movement of the pressing and shaping mechanism, the trigger can first contact the cutting assembly, then drives the cutting assembly to cooperate with the clamping assembly to cut the wire, and the jumping and displacement of the wire during the cutting process are inhibited, so that the cutting quality of the wire is improved.

Description

Technical Field

[0001] This invention relates to the field of metal cotter pin manufacturing equipment, specifically a bending and snapping device for metal cotter pins and its processing method. Background Technology

[0002] Cotter pins, as important fasteners, are widely used in railways, power, and machinery industries, primarily for locking pins, bolts, and other connecting parts to prevent loosening and detachment caused by vibration. Traditional cotter pin manufacturing processes often employ a discrete, step-by-step operation: first, coiled wire is introduced through a straightening mechanism, then cut into fixed-length straight sections using a cutting machine. These sections are then manually or via a robotic arm transferred to a bending die for stamping. This process is not only cumbersome and time-consuming, but also requires significant equipment space, making efficient continuous production difficult. Furthermore, the high level of manual intervention leads to poor product consistency and a high scrap rate.

[0003] Currently, in order to improve the efficiency of product manufacturing, the industry has gradually developed highly integrated continuous processing equipment. This type of equipment can complete the entire continuous process from wire straightening, cutting, forming to subsequent processing. Some models also support flexible production of multiple types of cotter pins such as B-type and R-type, adapting to the processing needs of various materials such as carbon steel and stainless steel.

[0004] However, existing continuous processing equipment typically has its guiding and limiting mechanisms located on the feed side, far from the cutting point, making it impossible to effectively constrain the near-end of the wire about to be cut. Due to the lack of precise positioning and locking modules for the cutting point, the clearance between the shearing punch and the receiving blade is uncontrollable during the shearing process. At the instant the shearing force is applied, the unconstrained metal wire is highly susceptible to elastic yielding, twisting around its axis, or axial movement. This unstable cutting state causes a shift in the relative position of the tool and the wire at the moment of cutting, resulting in an irregular, torn cross-section instead of a flush cut, a slanted cut, and a large amount of difficult-to-remove burrs at the root of the cut. These problems not only severely affect the appearance quality of the cotter pins but also significantly reduce the product's shear strength and fatigue life by altering the flow direction of the metal fiber structure, making it difficult to improve the finished product yield. Summary of the Invention

[0005] The purpose of this invention is to provide a bending and buckling device for metal cotter pins and its processing method, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A bending and buckling device for metal cotter pins includes: a cabinet, on which a workstation plate, a winding mechanism, and a pressing and shaping mechanism are provided. The winding mechanism can convey wire to the workstation plate, and the pressing and shaping mechanism can shape the wire on the workstation plate. The cabinet is also provided with a longitudinal support, which is placed between the winding mechanism and the workstation plate. The longitudinal support is equipped with a clamping component and a cutting component. The clamping component can clamp and fix the left and right sides of the wire cutting point.

[0008] The pressing and forming mechanism is equipped with a trigger. During the downward movement of the pressing and forming mechanism, the trigger can first contact the cutting component, and then drive the cutting component to cooperate with the clamping component to cut the wire, thereby suppressing the jumping and displacement of the wire during the cutting process.

[0009] The bending and buckling device for metal cotter pins as described above: the clamping assembly includes a shelf mounted on the longitudinal support, and two sets of mounting rods are symmetrically arranged along the length of the shelf. Supporting clamps and pressing positioning parts are rotatably mounted on the two sets of mounting rods respectively. The supporting clamps include a driving deflection plate. One end of the driving deflection plate is connected to a driving part arranged on the longitudinal support, and a support plate is installed on the other end. A cutting groove is formed on the support plate.

[0010] The metal cotter pin bending and buckling device as described above: the driving component includes a push cylinder hinged to the longitudinal support, the telescopic end of the push cylinder is equipped with a connecting block, and the connecting block is rotatably connected to the mounting post provided on the drive deflection plate.

[0011] The bending and buckling device for metal cotter pins as described above: the pressing and positioning component includes a driven deflection plate, one end of which is connected to the driving deflection plate via a linkage component, and the other end is fitted with a pressing plate, which has a clearance window.

[0012] The bending and buckling device for metal cotter pins as described above: the linkage includes a hinge rod, the two ends of which are respectively hinged to the connecting posts provided on the driving deflection plate and the driven deflection plate.

[0013] The metal cotter pin bending and buckling device described above: the cutting assembly includes a mounting plate disposed on the longitudinal support, the mounting plate is provided with two sets of insertion rods, each of the two sets of insertion rods is slidably provided with a connector, a cutting blade is disposed between the two sets of connectors, and springs are also sleeved on the two sets of insertion rods, one end of the spring abutting against the connector and the other end abutting against the insertion rod.

[0014] The bending and buckling device for the metal cotter pin as described above: the width of the clearance window is greater than the width of the cutting groove and the thickness of the cutting blade, and the length of the clearance window is greater than the length of the cutting blade.

[0015] The bending and snapping device for metal cotter pins as described above: the trigger element includes a trigger plate disposed on the pressing and forming mechanism.

[0016] A method for processing metal cotter pins is also proposed, which uses a bending and buckling device for metal cotter pins as described above, and includes the following steps:

[0017] Step 1: After the winding mechanism delivers the wire to the workstation plate, the push cylinder pushes the drive deflection plate to deflect. At the same time, the driven deflection plate and the drive deflection plate rotate in opposite directions to clamp the wire.

[0018] Step 2: The pressing and shaping mechanism descends. During this process, the trigger plate first contacts the cutting blade, and then forces the cutting blade to descend. It passes through the clearance window and cooperates with the cutting groove to complete the cutting of the wire.

[0019] Step 3: The pressing and shaping mechanism continues to descend until it contacts the wire. At this point, the push cylinder pulls the deflection plate to reverse, which in turn drives the driven deflection plate to move in the opposite direction, thereby releasing the wire.

[0020] Step 4: The pressing and shaping mechanism continues to operate and cooperates with the positioning columns set on the workstation plate to complete the pressing and shaping of the wire.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] By setting up a clamping assembly, the wire is clamped and fixed by the cooperation between the support clamping component and the pressing positioning component. At the same time, the clearance window opened on the pressing positioning component can expose the cutting point, achieving bidirectional rigid fixation of the wire at the cutting point. Cutting under the premise of clamping and fixing the wire can suppress the jumping and displacement of the wire at the moment of shearing, avoiding problems such as skewed cut and excessive burrs caused by wire rebound or shaking in the traditional cutting process, thereby improving the cut quality.

[0023] Once the wire is securely clamped, the cutting assembly utilizes the downward power of the pressing and shaping mechanism 4 to trigger the pressure plate to synchronously drive the cutting blade downward. This blade engages with the cutting groove on the support clamping component to complete the cutting of the wire. The structure is simple and does not require a separate drive source for the cutting blade.

[0024] By limiting the size of the clearance window, it is ensured that the pressing plate will not interfere with the cutting blade during the opening and closing process. With the cooperation of the compressed spring, the cutting blade is in the clearance position in the initial state and only operates when needed, avoiding accidental contact with the wire in the conveyor, thereby improving the stability of continuous operation of the equipment.

[0025] In addition, silicone pads are added to the contact surfaces of the support plate and the pressing plate, transforming the traditional rigid clamping into flexible clamping. While ensuring stable clamping, this effectively prevents the metal wire surface from developing clamping marks or plastic deformation due to excessive clamping pressure, thereby improving the appearance quality of the finished product. Attached Figure Description

[0026] Figure 1 A schematic diagram of the bending and buckling device for metal cotter pins;

[0027] Figure 2 A schematic diagram of the cutting and clamping components in a bending and buckling device for metal cotter pins;

[0028] Figure 3 A schematic diagram of the trigger element in a bending and snapping device for metal cotter pins;

[0029] Figure 4 A schematic diagram of the position and structure of the longitudinal support in the bending and buckling device for metal cotter pins;

[0030] Figure 5 A schematic diagram of the cooperation between the cutting component and the clamping component in a bending and buckling device for metal cotter pins;

[0031] Figure 6 This is a schematic diagram of the cutting component in a bending and buckling device for metal cotter pins.

[0032] Figure 7 This is a schematic diagram of the cutting component in a bending and buckling device for metal cotter pins.

[0033] Figure 8 A schematic diagram of the clamping component in a bending and buckling device for metal cotter pins;

[0034] Figure 9 A schematic diagram of the pressing and positioning component in a bending and buckling device for metal cotter pins;

[0035] Figure 10 This is a schematic diagram of the structure of a bending and buckling device for metal cotter pins, showing the cooperation of the pressing and positioning parts, the linkage parts, and the supporting and clamping parts.

[0036] In the diagram: 1. Cabinet; 2. Rewinding mechanism; 3. Workstation plate; 301. Positioning post; 4. Pressing and shaping mechanism; 5. Trigger plate; 6. Wire; 7. Limiting block; 8. Longitudinal support; 9. Push cylinder; 10. Mounting plate; 11. Insertion rod; 12. Support plate; 1201. Cutting groove; 13. Pressing plate; 1301. Clearance window; 14. Cutting blade; 15. Shelf; 16. Mounting rod; 17. Spring; 18. Driven deflection plate; 19. Driven deflection plate; 20. Mounting post; 21. Hinge rod; 22. Connecting post; 23. Connecting block; 24. Insertion tube. Detailed Implementation

[0037] Various exemplary embodiments, features, and aspects of this application will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0038] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0039] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented without certain specific details. In some instances, methods, means, and elements well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0040] Please see Figures 1-10 In this embodiment of the invention, a bending and buckling device for a metal cotter pin includes:

[0041] A cabinet 1 is provided, on which a workstation plate 3, a winding mechanism 2, and a pressing and shaping mechanism 4 are installed. The winding mechanism 2 can transport wires 6 onto the workstation plate 3, and the pressing and shaping mechanism 4 can shape the wires 6 on the workstation plate 3. A longitudinal support 8 is also provided on the cabinet 1, positioned between the winding mechanism 2 and the workstation plate 3. Figure 4 As shown, a limiting block 7 is provided between the longitudinal support 8 and the winding mechanism 2. The limiting block 7 is used to guide and position the conveyed wire 6 to prevent the wire 6 from bending downward. The longitudinal support 8 is also equipped with a clamping assembly and a cutting assembly. The clamping assembly can clamp and fix the left and right sides of the cutting point of the wire 6.

[0042] Please see Figure 2 , Figure 5 , Figure 6 , Figure 8 , Figure 9 , Figure 10 The clamping assembly includes a shelf 15 mounted on the longitudinal support 8. The shelf 15 has two sets of mounting rods 16 symmetrically arranged along its length. Support clamping components and pressing positioning components are rotatably mounted on the two sets of mounting rods 16 respectively. The support clamping component includes a drive deflection plate 19. One end of the drive deflection plate 19 is connected to a drive component mounted on the longitudinal support 8, and the other end is mounted with a support plate 12. A cutting groove 1201 is formed on the support plate 12.

[0043] In detail, such as Figure 10 As shown, the aforementioned drive deflection plate 19 is configured in a Z-shaped structure and is hinged to the mounting rod 16 located below (see reference). Figure 7 (Description), and a silicone pad is provided on the side of the support plate 12 away from the drive deflection plate 19, the silicone pad being able to prevent clamping damage to the wire 6 during subsequent clamping process.

[0044] The driving component includes a push cylinder 9 hinged to the longitudinal support 8. A connecting block 23 is installed on the telescopic end of the push cylinder 9. The connecting block 23 is rotatably connected to the mounting post 20 provided on the driving deflection plate 19.

[0045] The pressing and positioning component includes a driven deflection plate 18, as shown in the reference... Figure 7 The driven deflection plate 18 is rotatably connected to the mounting rod 16 located above it, and one end of the driven deflection plate 18 is connected to the driving deflection plate 19 through a linkage component, and the other end is equipped with a pressing plate 13, on which a clearance window 1301 is provided.

[0046] In particular, a silicone layer is also provided on the side of the pressing plate 13 away from the driven deflection plate 18. When the pressing plate 13 and the support plate 12 are subsequently engaged, the silicone layer can prevent rigid compression of the wire 6 during the clamping process and prevent the wire 6 from deforming.

[0047] Please see Figure 10 The linkage includes a hinge rod 21, and the two ends of the hinge rod 21 are respectively hinged to the connecting post 22 provided on the driving deflection plate 19 and the driven deflection plate 18.

[0048] Specifically, in the initial state, the driving deflection plate 19 and the driven deflection plate 18 are far apart. At this time, the telescopic end of the push cylinder 9 pulls the connecting block 23 closer to the push cylinder 9, and the pressing plate 13 and the support plate 12 are in an open state, so that the wire 6 can pass normally to the left side of the workstation plate 3 (e.g., Figure 2 As shown), the subsequent pressing and molding process will be carried out;

[0049] After the winding mechanism 2 delivers the wire 6 to the designated position, the push cylinder 9 enters the working state and pushes the connecting block 23 outward. Subsequently, the drive deflection plate 19 rotates clockwise around the mounting rod 16 located below, causing the support plate 12 to rotate (see reference). Figure 7 (To be described in detail), at the same time, due to the connection and cooperation of the hinge rod 21, the driven deflection plate 18 will drive the pressing plate 13 to rotate counterclockwise around the mounting rod 16 above; until the push cylinder 9 stops, the support plate 12 and the pressing plate 13 can just complete the stable clamping of the wire 6.

[0050] Specifically, after clamping, the clearance window 1301 on the pressing plate 13 can fully expose the cutting point of the wire 6, making it convenient for the subsequent cutting components to cut in; at the same time, the pressing plate 13 can press the sections on both sides of the cutting point, thereby preventing the wire 6 from jumping and displacing due to shearing force during the cutting process.

[0051] Specifically, please refer to Figure 4 , Figure 5 , Figure 6 , Figure 7 The cutting assembly includes a mounting plate 10 disposed on the longitudinal support 8. The mounting plate 10 is provided with two sets of insertion rods 11. Insertion tubes 24 are slidably disposed on the two sets of insertion rods 11 respectively. A cutting blade 14 is disposed between the two sets of insertion tubes 24. A spring 17 is also sleeved on the two sets of insertion rods 11. One end of the spring 17 abuts against the insertion tube 24 and the other end abuts against the insertion rod 11.

[0052] Please see Figure 6 , Figure 7 The spring 17 is always in a compressed state, which pushes the plug-in cylinder 24 to always move toward the mounting plate 10, so that in the initial state, the cutting blade 14 is away from the wire 6, avoiding interference during the wire 6 conveying process;

[0053] Furthermore, a position sensor is installed on the longitudinal support 8. The position sensor is connected to the push cylinder 9 and can detect the position of the cutting blade 14 in real time, thereby controlling the action of the push cylinder 9.

[0054] Specifically, the width of the clearance window 1301 is greater than the width of the cutting groove 1201 and the thickness of the cutting blade 14, and the length of the clearance window 1301 is greater than the length of the cutting blade 14.

[0055] Due to the above restrictions, the pressing plate 13 can completely avoid the cutting blade 14 during its operation, preventing interference between the two.

[0056] Further, please refer to Figure 2 , Figure 3The pressing and forming mechanism 4 is provided with a trigger. During the downward movement of the pressing and forming mechanism 4, the trigger can first contact the cutting component, and then drive the cutting component to cooperate with the clamping component to cut the wire 6, thereby suppressing the jumping and displacement of the wire 6 during the cutting process.

[0057] The triggering element includes a trigger plate 5 disposed on the pressing and forming mechanism 4. In particular, the height of the trigger plate 5 is lower than that of the pressing and forming mechanism 4. Therefore, when the pressing and forming mechanism 4 descends, the trigger plate 5 can contact the cutting blade 14 first.

[0058] In summary, when the support plate 12 and the pressing plate 13 cooperate to stably clamp the wire 6, the downward pressing and shaping mechanism 4 can make the triggering plate 5 contact the cutting blade 14. As the pressing and shaping mechanism 4 continues to move downward, the cutting blade 14 gradually approaches the support plate 12 and is finally pressed into the cutting groove 1201 to complete the cutting and segmentation of the wire 6. Because the pressing plate 13 and the support plate 12 stably clamp the wire 6 before cutting, it can avoid problems such as skewed cuts and excessive burrs caused by the rebound or shaking of the wire 6 during the cutting process, thereby improving the cut quality and thus improving the appearance quality of the final product.

[0059] At this time, the pressing and shaping mechanism 4 comes into contact with the wire 6. At the same time, the position sensor set on the longitudinal support 8 sends a reset command to the push cylinder 9 after detecting that the cutting blade 14 has reached the designated position. Then, the push cylinder 9 pulls the connecting block 23 to reset. During this process, the drive deflection plate 19 pulls the support plate 12 to rotate counterclockwise. Under the connection of the hinge rod 21, it drives the driven deflection plate 18 to pull the pressing plate 13 to rotate clockwise, thereby releasing the wire 6 so that the pressing and shaping mechanism 4 can cooperate with the positioning column 301 to press and shape the wire 6. During the descent of the pressing and shaping mechanism 4, the trigger pressure plate 5, which continues to descend, will continue to press the cutting blade 14 to descend. However, since the support plate 12 is gradually resetting at this time, the cutting blade 14 will not be squeezed between the support plate 12.

[0060] After the subsequent pressing is completed, the pressing and shaping mechanism 4 resets, triggering the pressure plate 5 to gradually rise. At the same time, the spring 17 releases its elastic potential energy, pushing the cutting blade 14 back to its initial position so that the cutting operation of the wire 6 can continue.

[0061] A method for processing metal cotter pins is also proposed, which uses a bending and buckling device for metal cotter pins as described above, and includes the following steps:

[0062] Step 1: After the winding mechanism 2 delivers the wire 6 to the workstation plate 3, the push cylinder 9 pushes the drive deflection plate 19 to deflect. At the same time, the driven deflection plate 18 and the drive deflection plate 19 rotate in opposite directions to clamp the wire 6.

[0063] Step 2: The pressing and shaping mechanism 4 descends. During this process, the trigger plate 5 first contacts the cutting blade 14, and then forces the cutting blade 14 to descend. Through the clearance window 1301, and in cooperation with the cutting groove 1201, the cutting of the wire 6 is completed.

[0064] Step 3: The pressing and shaping mechanism 4 continues to descend until it contacts the wire 6. At this time, the push cylinder 9 pulls the drive deflection plate 19 to reverse, and at the same time drives the driven deflection plate 18 to move in the opposite direction, thereby releasing the wire 6.

[0065] Step 4: The pressing and shaping mechanism 4 continues to operate and cooperates with the positioning column 301 set on the workstation plate 3 to complete the pressing and shaping of the wire 6.

[0066] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0067] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A bending and snapping device for metal cotter pins, comprising: A cabinet (1) is provided with a workstation plate (3), a winding mechanism (2), and a pressing and shaping mechanism (4). The winding mechanism (2) can transport wires (6) to the workstation plate (3), and the pressing and shaping mechanism (4) can shape the wires (6) on the workstation plate (3). The cabinet is characterized by: The cabinet (1) is also provided with a longitudinal support (8), which is placed between the winding mechanism (2) and the work station plate (3). The longitudinal support (8) is equipped with a clamping component and a cutting component. The clamping component can clamp and fix the left and right sides of the cutting point of the wire (6). The pressing and shaping mechanism (4) is provided with a trigger. During the downward movement of the pressing and shaping mechanism (4), the trigger can first contact the cutting component and then drive the cutting component to cooperate with the clamping component to cut the wire (6) and suppress the jumping and displacement of the wire (6) during the cutting process.

2. The bending and buckling device for a metal cotter pin according to claim 1, characterized in that, The clamping assembly includes a shelf (15) mounted on the longitudinal support (8). The shelf (15) has two sets of mounting rods (16) symmetrically arranged along its length. Support clamping components and pressing positioning components are rotatably mounted on the two sets of mounting rods (16). The support clamping component includes a drive deflection plate (19). One end of the drive deflection plate (19) is connected to the drive component arranged on the longitudinal support (8), and the other end is equipped with a support plate (12). A cutting groove (1201) is provided on the support plate (12).

3. The bending and buckling device for a metal cotter pin according to claim 2, characterized in that, The driving component includes a push cylinder (9) hinged to the longitudinal support (8), and a connecting block (23) is installed at the telescopic end of the push cylinder (9). The connecting block (23) is rotatably connected to the mounting column (20) provided on the driving deflection plate (19).

4. The bending and buckling device for a metal cotter pin according to claim 2, characterized in that, The pressing and positioning component includes a driven deflection plate (18), one end of which is connected to the driving deflection plate (19) via a linkage component, and the other end is fitted with a pressing plate (13), on which a clearance window (1301) is provided.

5. The bending and buckling device for a metal cotter pin according to claim 4, characterized in that, The linkage includes a hinge rod (21), the two ends of which are hinged to the connecting post (22) provided on the driving deflection plate (19) and the driven deflection plate (18), respectively.

6. The bending and buckling device for a metal cotter pin according to claim 4, characterized in that, The cutting assembly includes a mounting plate (10) disposed on the longitudinal support (8). The mounting plate (10) is provided with two sets of insertion rods (11). Insertion tubes (24) are slidably disposed on the two sets of insertion rods (11). A cutting blade (14) is disposed between the two sets of insertion tubes (24). Springs (17) are also sleeved on the two sets of insertion rods (11). One end of the spring (17) abuts against the insertion tube (24), and the other end abuts against the insertion rod (11).

7. The bending and buckling device for a metal cotter pin according to claim 6, characterized in that, The width of the clearance window (1301) is greater than the width of the cutting groove (1201) and the thickness of the cutting blade (14), and the length of the clearance window (1301) is greater than the length of the cutting blade (14).

8. The bending and buckling device for a metal cotter pin according to claim 2, characterized in that, The triggering element includes a triggering plate (5) disposed on the pressing and forming mechanism (4).

9. A method for processing metal cotter pins, characterized in that, The bending and buckling device for a metal cotter pin as described in claim 1 includes the following steps: Step 1: After the winding mechanism (2) delivers the wire (6) to the workstation plate (3), the push cylinder (9) pushes the drive deflection plate (19) to deflect. At the same time, the driven deflection plate (18) and the drive deflection plate (19) rotate towards each other to clamp the wire (6). Step 2: The pressing and shaping mechanism (4) descends. During this process, the trigger plate (5) first contacts the cutting blade (14), and then forces the cutting blade (14) to descend. Through the clearance window (1301), and in cooperation with the cutting groove (1201), the cutting of the wire (6) is completed. Step 3: The pressing and shaping mechanism (4) continues to descend until it contacts the wire (6). At this time, the push cylinder (9) pulls the drive deflection plate (19) to reverse, and at the same time drives the driven deflection plate (18) to move in the opposite direction, thereby releasing the wire (6). Step 4: The pressing and shaping mechanism (4) continues to operate and cooperates with the positioning column (301) set on the work station plate (3) to complete the pressing and shaping of the wire (6).

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