Cutting scrap mechanism of high speed cold header

Abstract

The application provides a scrap edge cutting mechanism of a high-speed cold header applied to the field of high-speed cold headers, which comprises a rack, a fixed die set, a feeding mechanism and a movable die set arranged in sequence on the rack; the fixed die set is provided with a fixed die core for positioning one end of a workpiece; the feeding mechanism is provided with a clamping mechanism, the clamping mechanism comprises three groups of radial sliding seats, the inner side of the radial sliding seat is provided with a clamping groove, and the end of the clamping groove is provided with an inner punching seat; the movable die set is provided with a movable die core, the movable die core comprises a die seat and a punching die core sleeve slidingly connected in the die seat, and the end of the punching die core sleeve is provided with an outer punching ring opening matched with the inner punching seat; the ring-shaped scrap edge is cut off through the cooperation of the outer punching ring opening and the inner punching seat, the ring-shaped scrap edge is cut into fan-shaped scrap edges by using a slitting cutter and a slitting groove, automatic material returning is realized by cooperating with a material returning slope and other structures, scrap edge sleeve joint jamming is avoided, the scrap edge cutting efficiency and the workpiece machining quality are improved, and the batch continuous machining demand of the high-speed cold header is met.

Description

Technical Field

[0001] This application relates to the field of high-speed cold heading machines, and in particular to the waste edge cutting mechanism of high-speed cold heading machines. Background Technology

[0002] High-speed cold heading machines are widely used in the cold heading of metal wires. Due to plastic deformation, the workpiece will produce ring-shaped waste edges, and their removal is a key process to ensure the workpiece accuracy and processing efficiency.

[0003] When processing ring-shaped waste, the existing waste cutting mechanism tends to tightly adhere to the waste cutting component due to the toughness and shape of the waste itself. It cannot automatically detach, and when the accumulation is severe, manual shutdown and cleaning are required, which reduces the cutting efficiency and seriously affects the continuous processing efficiency. It cannot meet the batch continuous processing requirements of high-speed cold heading machines.

[0004] To address these issues, a waste edge trimming mechanism for high-speed cold heading machines is proposed. Summary of the Invention

[0005] The purpose of this application is to solve the problems of easy attachment of punching components after ring cutting of annular waste, difficulty in unloading, and low cutting efficiency. Compared with the existing technology, it provides a waste edge cutting mechanism for a high-speed cold heading machine, including a frame, a fixed die core, a clamping mechanism, and a moving die core. The specific structure and connection relationship of each component are as follows: The frame is provided with a fixed module, a feeding mechanism and a moving module in sequence. The frame provides installation support for the entire waste trimming mechanism. The fixed module, the feeding mechanism and the moving module are arranged in sequence along the length of the frame to ensure that each component works together to complete the waste trimming process.

[0006] The fixed mold core is set on the fixed mold assembly and is used to position one end of the workpiece. After the workpiece is cold-headed, one end of it is attached to the fixed mold core. The fixed mold core is used to achieve axial positioning of the workpiece, avoid axial displacement of the workpiece during the waste edge cutting process, and ensure the accuracy of waste edge cutting.

[0007] The clamping mechanism, mounted on the feeding mechanism, includes three sets of radial slides evenly spaced at equal angles, arranged in a ring. The inner side of each radial slide has a clamping groove for clamping the workpiece, which is adapted to the shape of the workpiece. One end of the workpiece has a cold-forged end, which has an annular waste edge formed after cold forging. The end of the clamping groove near the moving module has an inner punching table, which corresponds to the cold-forged end and provides support for the removal of the annular waste edge.

[0008] The moving die core, set on the moving module, includes a die base and a punching die core sleeve slidably connected within the die base. The die base provides a mounting carrier for other components of the moving die core. The end of the punching die core sleeve opposite to the feeding mechanism is provided with an outer punching ring. The outer punching ring is arranged opposite to the inner punching table, and the outer punching ring can approach the inner punching table axially and be sleeved on the outside of the inner punching table. The relative displacement between the two generates a shearing force, which is used to remove the annular waste edge on the cold heading end.

[0009] Furthermore, the moving mold core also includes an ejector rod, which is slidably connected within the mold base. A return spring is clamped between one end of the ejector rod and the mold base, and the return spring has a spring force that drives the ejector rod to return to its original position in the direction of the feeding mechanism. The other end of the ejector rod is fixed with a cavity that matches the cold heading end, used to position and fit the cold heading end, assisting in the shearing of the annular waste edge. The ejector rod can slide axially along the mold base. After the cavity fits with the cold heading end, it can further fix the position of the cold heading end, preventing deformation or displacement of the cold heading end during the waste edge cutting process. The return spring can drive the ejector rod to return to its original position after the waste edge cutting process is completed, preparing for the next waste edge cutting process.

[0010] Furthermore, the punching die core sleeve is slidably sleeved on the outside of the ejector die rod, and the punching die core sleeve can slide along the axial direction of the ejector die rod. A driving ring sleeve is provided at the end of the punching die core sleeve away from the outer punching ring. The driving ring sleeve and the punching die core sleeve are fixedly connected by several connecting rods that are evenly spaced at equal angles. The connecting rods are used to transmit driving force to ensure that the driving ring sleeve and the punching die core sleeve move synchronously. The outer wall of the die base is provided with a cutting edge groove for cooperating with the connecting rod. The cutting edge groove provides guidance for the sliding of the connecting rod and restricts the movement direction of the connecting rod to ensure that the punching die core sleeve slides smoothly along the axial direction. The driving ring sleeve is slidably sleeved on one side of the outer wall of the die base. A second return spring is clamped between the driving ring sleeve and the outer wall of the die base. The second return spring is used to drive the driving ring sleeve to return to its original position. The driving ring sleeve realizes the axial displacement action corresponding to the die base through a first driving mechanism. The first driving mechanism provides power for the movement of the driving ring sleeve, thereby driving the punching die core sleeve to realize axial displacement.

[0011] Furthermore, a mold closing sleeve is fixed at one end of the mold base near the feeding mechanism. The mold closing sleeve has a mold closing groove at its end, and the radial slide has a mold closing boss at its end that cooperates with the mold closing groove. When the feeding mechanism and the moving mold are combined, the mold closing boss is embedded in the mold closing groove to achieve the positioning of the radial slide and the mold closing sleeve, improve the clamping stability of the clamping mechanism, prevent the radial slide from shifting after mold closing, and further ensure the accuracy of waste edge cutting.

[0012] Furthermore, a material ejection ramp inclined away from the workpiece is provided between the mold closing boss and the inner punching table. The inclination angle of the material ejection ramp is 30°-60°. The material ejection ramp provides guidance for the removal of the waste edge. A slitting blade extending radially with its cutting edge facing the punching die core sleeve is provided in the middle of the material ejection ramp. The end of the punching die core sleeve is provided with a slitting groove that cooperates with the slitting blade. During slitting, the slitting blade is embedded in the slitting groove. Through the cooperation of the slitting blade and the slitting groove, the cut-off annular waste edge is divided into three sets of fan-shaped waste edges, which facilitates the removal and discharge of the waste edge.

[0013] Furthermore, the three sets of radial slides are engaged and clamped or moved away from each other for material removal via the second drive mechanism. The second drive mechanism provides power for the movement of the radial slides, driving the three sets of radial slides to engage synchronously to clamp the workpiece, or to move away synchronously to remove the workpiece and remove the waste edge. The two sides of the slitting blade are also symmetrically provided with two sets of corner grooves. The slitting blade engages with the slitting groove to recut the cut annular waste edge into three sets of fan-shaped waste edges. The corner grooves are used to attach to the inner arc end of the fan-shaped waste edge, temporarily limiting the fan-shaped waste edge and preventing it from falling off randomly after slitting, thus preparing for subsequent automatic material removal.

[0014] Furthermore, a limiting slider is fixed at the end of the ejector die rod away from the cavity. The die base is provided with a limiting groove that cooperates with the limiting slider. The limiting slider and the limiting groove cooperate to limit the axial displacement stroke of the ejector die rod, so as to avoid excessive sliding of the ejector die rod and damage to the return spring. After the moving die assembly and the feeding mechanism are fully engaged, the cold heading end is clamped between the cavity and the inner punching table. At this time, the return spring is in a compressed state, and the limiting slider is displaced to the maximum stroke in the limiting groove, ensuring that the cold heading end is stably clamped and providing stable support for the waste edge trimming process.

[0015] Furthermore, after the feeding mechanism and the moving module are fully engaged, the driving ring sleeve continues to move closer to the feeding mechanism through the first driving mechanism. The driving ring sleeve sequentially drives the outer punching ring and the inner punching table to engage and interlock, so that the annular waste edge is sheared. It also drives the slitting groove and the slitting blade to engage, so that the annular waste edge is cut into three sets of fan-shaped waste edges. At this time, the second reset spring is in a compressed state, and the driving ring sleeve moves to its maximum stroke relative to the mold seat, ensuring that the annular waste edge is completely removed and cut.

[0016] Furthermore, the end of the punching die core sleeve is also provided with an inclined inner cavity corresponding to the ejection slope. By aligning the inclined inner cavity with the ejection slope, the cut fan-shaped waste edge is pressed from a planar state into an inclined state that fits the surface of the ejection slope. When the three sets of radial slides gradually separate, the fan-shaped waste edge hanging in the corner groove is stretched and deformed to store energy. When the fan-shaped waste edge is separated from the corner groove, the elastic potential energy of the fan-shaped waste edge is released, causing the fan-shaped waste edge to pop out along the ejection slope, completing the automatic ejection and completely solving the problem of difficult ejection and easy jamming of the annular waste edge in the prior art.

[0017] Compared to existing technologies, the advantages of this application are: This invention, through the cooperation of a slitting blade and a slitting groove, cuts the removed annular waste edge into three sets of fan-shaped waste edges, reducing the volume of the waste edge. At the same time, with the synergistic effect of the material ejection ramp, the inclined inner cavity, and the corner groove, the fan-shaped waste edge automatically pops out along the material ejection ramp when the radial slide separates, through the release of elastic potential energy. This completely avoids the waste edge getting stuck inside the mechanism, eliminating the need for manual shutdown for cleaning, reducing the labor intensity of operators, ensuring the smoothness of continuous processing, improving the efficiency of waste edge cutting, and adapting to the batch and continuous processing needs of high-speed cold heading machines. Attached Figure Description

[0018] Figure 1 This is a schematic diagram showing the arrangement of the fixed module, the feeding mechanism, and the moving module as proposed in this application; Figure 2 This is a schematic diagram of the clamping mechanism, fixed mold core, and moving mold core proposed in this application; Figure 3 This is a schematic diagram of the clamping mechanism proposed in this application; Figure 4 This is an exploded structural diagram of the clamping mechanism proposed in this application; Figure 5 for Figure 4 Enlarged structural diagram of section A in the middle; Figure 6 This is a schematic diagram of the structure of the moving mold core proposed in this application; Figure 7 This is an exploded structural diagram of the moving mold core proposed in this application; Figure 8 This is a cross-sectional structural diagram of this application; Figure 9 for Figure 8 Enlarged structural diagram of section B in the middle; Figure 10 This is a schematic diagram illustrating the state during the ring-shaped waste edge cutting and splitting process proposed in this application; Figure 11 This is a schematic diagram of the state of the annular waste edge deformation and material removal proposed in this application; Figure 12This is a schematic diagram of the process flow for the circumferential waste edge removal proposed in this application.

[0019] Explanation of the labels in the diagram: 1. Rack; 2. Fixed mold core; 201. Fixed mold assembly; 3. Clamping mechanism; 301. Feeding mechanism; 31. Radial slide; 32. Mold closing boss; 33. Inner punching table; 34. Clamping groove; 35. Slitting blade; 36. Corner groove; 37. Unloading ramp; 4. Moving mold core; 401. Moving mold assembly; 41. Mold base; 411. Trimming groove; 412. Limiting groove; 42. Mold closing sleeve; 421. Mold closing slot; 43. Punching mold core sleeve; 431. Outer punching ring; 432. Cutting groove; 433. Drive ring sleeve; 434. Connecting rod; 435. Angled inner cavity; 44. Ejector mold rod; 441. Cavity; 442. Limiting slider; 45. Return spring one; 46. Return spring two; 5. Workpiece; 501. Circular waste edge; 502. Fan-shaped waste edge; 51. Cold heading end. Detailed Implementation

[0020] The embodiments will be described clearly and completely with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments in this application without creative effort are within the scope of protection of this application. Example

[0021] This invention provides a waste edge trimming mechanism for a high-speed cold heading machine. Please refer to [link / reference]. Figure 1 - Figure 12 It includes a frame 1, a fixed mold core 2, a clamping mechanism 3, and a moving mold core 4; For details, please refer to the following first. Figure 1 The frame 1 provides stable mounting support for the entire mechanism. The fixed mold assembly 201, the feeding mechanism 301, and the moving mold assembly 401 are sequentially fixedly mounted on the frame 1 along its length. The installation positions of the three are aligned to ensure coordinated operation of all components. The fixed mold core 2 is fixedly mounted on the fixed mold assembly 201. The end of the fixed mold core 2 has a positioning groove that matches one end of the workpiece 5, used to fit the workpiece 5 and achieve axial positioning.

[0022] The clamping mechanism 3 is installed at the end of the feeding mechanism 301 and includes three sets of radial slides 31 evenly spaced at equal angles. The three sets of radial slides 31 are arranged in a ring, and the included angle between two adjacent sets of radial slides 31 is 120°. The inner side of the radial slides 31 is integrally formed with a clamping groove 34. The shape of the clamping groove 34 is adapted to the shape of the workpiece 5. The end of the clamping groove 34 near the moving module 401 is integrally formed with an inner punching table 33. The end face of the inner punching table 33 fits against the cold heading end 51, providing support for the removal of the annular waste edge 501.

[0023] The moving die core 4 is installed on the moving module 401 and includes a die base 41 and a punching die core sleeve 43. The die base 41 is fixed on the moving module 401, and the punching die core sleeve 43 is slidably connected to the inside of the die base 41 and can slide along the axial direction of the die base 41. The end of the punching die core sleeve 43 opposite to the feeding mechanism 301 is integrally formed with an outer punching ring 431. The outer punching ring 431 is opposite to the inner punching table 33, and the inner diameter of the outer punching ring 431 is adapted to the outer diameter of the inner punching table 33, so that it can be sleeved on the outside of the inner punching table 33.

[0024] The ejector rod 44 is slidably connected to the inside of the die base 41 and passes through the punching die core sleeve 43. A return spring 45 is clamped between one end of the ejector rod 44 and the die base 41. The two ends of the return spring 45 abut against the ejector rod 44 and the die base 41 respectively, and have the elastic force to drive the ejector rod 44 to return to the direction of the feeding mechanism 301. The other end of the ejector rod 44 is integrally formed with a cavity 441 that matches the cold heading end 51. The inner wall of the cavity 441 fits against the outer wall of the cold heading end 51 to achieve the positioning of the cold heading end 51.

[0025] The drive ring sleeve 433 is located at the end of the punching die core sleeve 43 away from the outer punching ring opening 431. The drive ring sleeve 433 and the punching die core sleeve 43 are fixedly connected by three sets of connecting rods 434 evenly spaced at equal angles. The two ends of the connecting rods 434 are welded and fixed to the drive ring sleeve 433 and the punching die core sleeve 43, respectively. The outer wall of the die base 41 is provided with a cutting edge groove 411 that cooperates with the connecting rod 434. The connecting rod 434 passes through the cutting edge groove 411 and can slide axially along the cutting edge groove 411. The drive ring sleeve 433 is slidably sleeved on the outer wall of the die base 41. A return spring 46 is clamped between the drive ring sleeve 433 and the outer wall of the die base 41. The two ends of the return spring 46 abut against the drive ring sleeve 433 and the die base 41, respectively. The drive mechanism is fixedly installed on the moving module 401. Its output end is fixedly connected to the drive ring sleeve 433 and is used to drive the drive ring sleeve 433 to move axially.

[0026] The mold closing sleeve 42 is fixedly installed on the mold base 41 near the feeding mechanism 301 by bolts. The mold closing sleeve 42 has a mold closing groove 421 at its end. The radial slide 31 has an integrally formed mold closing boss 32 at its end. The mold closing boss 32 and the mold closing groove 421 are in clearance fit. When the mold is closed, the mold closing boss 32 is embedded in the mold closing groove 421.

[0027] The ejection ramp 37 is integrally formed between the mold closing boss 32 and the inner punching table 33, and is inclined in a direction away from the workpiece 5 with an inclination angle of 45°. The slitting blade 35 is integrally formed in the middle of the ejection ramp 37, extends radially, and the blade is directed towards the punching die core sleeve 43. The end of the punching die core sleeve 43 is provided with a slitting groove 432 that cooperates with the slitting blade 35. During slitting, the slitting blade 35 is embedded in the slitting groove 432.

[0028] The second drive mechanism is fixedly installed on the feeding mechanism 301, and its output end is fixedly connected to the radial slide 31 to drive the three sets of radial slides 31 to engage or disengage synchronously; the corner groove 36 is integrally formed on both sides of the slitting blade 35 and is symmetrically distributed to hang on the inner arc end of the fan-shaped waste edge 502.

[0029] The limiting slider 442 is fixedly installed on the end of the ejector rod 44 away from the cavity 441 by bolts. The mold base 41 has a limiting groove 412 that cooperates with the limiting slider 442. The limiting slider 442 can slide axially along the limiting groove 412 to limit the displacement stroke of the ejector rod 44.

[0030] The inclined inner cavity 435 is opened at the end of the punching die core sleeve 43. It has the same inclination angle and shape as the ejection slope 37. When it is aligned, it fits with the ejection slope 37 and presses the fan-shaped waste edge 502 into an inclined state.

[0031] After the cold heading process is completed, the workpiece 5 is transported to the feeding mechanism 301. One end of the workpiece 5 is attached to the fixed mold core 2 to achieve axial positioning. Subsequently, the driving mechanism drives the three sets of radial slides 31 to engage synchronously. The clamping groove 34 on the inner side of the radial slide 31 is attached to the workpiece 5 to achieve stable clamping of the workpiece 5. At this time, the cold heading end 51 of the workpiece 5 corresponds to the inner punching table 33, providing stable support for the subsequent waste edge cutting process.

[0032] The moving module 401 moves toward the feeding mechanism 301 until the feeding mechanism 301 and the moving module 401 are fully engaged. At this time, the mold closing boss 32 at the end of the radial slide block 31 is embedded in the mold closing groove 421 of the mold closing sleeve 42, realizing the positioning of the radial slide block 31 and the mold closing sleeve 42, further improving the clamping stability of the clamping mechanism 3 and avoiding component displacement during the waste cutting process. At the same time, the ejector rod 44 moves toward the feeding mechanism 301 under the buffer push of the return spring 45, and the cavity 441 fits with the cold heading end 51, realizing further positioning of the cold heading end 51. The limiting slider 442 slides to the maximum stroke in the limiting slide groove 412 and abuts against the end of the slide groove, limiting the excessive displacement of the ejector rod 44. At this time, the return spring 45 is in a compressed state, preparing for subsequent ejection reset.

[0033] After the feeding mechanism 301 and the moving module 401 are closed, the drive mechanism starts and drives the drive ring sleeve 433 to move axially along the mold base 41 toward the feeding mechanism 301. The drive ring sleeve 433 drives the punching die core sleeve 43 to move synchronously through the connecting rod 434. The connecting rod 434 slides along the cutting edge slide groove 411 to ensure the smooth displacement of the punching die core sleeve 43. The outer punching ring opening 431 at the end of the punching die core sleeve 43 gradually approaches the inner punching table 33 and is sleeved on the outside of the inner punching table 33. The relative displacement between the outer punching ring opening 431 and the inner punching table 33 forms a shearing force, which completely removes the annular waste edge 501 on the cold heading end 51 from the workpiece 5. At this time, the return spring 46 is in a compressed state with the displacement of the drive ring sleeve 433.

[0034] The drive mechanism continues to drive the drive ring sleeve 433 to move, and the punching die core sleeve 43 continues to move synchronously until the slitting groove 432 at the end of the punching die core sleeve 43 engages with the slitting blade 35 on the ejection ramp 37. The slitting blade 35 is embedded in the slitting groove 432. Through the cooperation of the two, the cut-off annular waste edge 501 is cut into three sets of fan-shaped waste edges 502. At the same time, the inclined inner cavity 435 at the end of the punching die core sleeve 43 engages with the ejection ramp 37, pressing the three sets of fan-shaped waste edges 502 from a planar state into an inclined state that fits the surface of the ejection ramp 37. The inner arc end of the fan-shaped waste edge 502 is attached to the corner groove 36, realizing the temporary limit of the fan-shaped waste edge 502. At this time, the drive ring sleeve 433 moves to the maximum stroke, completing the slitting process.

[0035] After the slitting is completed, the drive mechanism one stops working, the reset spring two 46 releases its elastic force, and the drive ring sleeve 433 drives the punching die core sleeve 43 to reset away from the feeding mechanism 301. The punching die core sleeve 43 separates from the inner punching table 33 and the slitting blade 35. Subsequently, the drive mechanism two drives the three sets of radial slides 31 to move away from the workpiece 5 simultaneously. During the separation of the radial slides 31, the fan-shaped waste edge 502, which is attached to the corner groove 36, is stretched and deformed, storing elastic potential energy. When the fan-shaped waste edge 502 is in the corner groove 36, it will be stretched and deformed. When the waste edge 502 is completely separated from the corner groove 36, the elastic potential energy is released instantly. The fan-shaped waste edge 502 is quickly ejected along the ejection slope 37 under the action of elastic force, completing the automatic ejection. At the same time, the reset spring 45 releases the elastic force, driving the ejector die 44 to reset. The limit slider 442 slides to the initial position with the ejector die 44. Finally, the moving module 401 separates from the feeding mechanism 301, and the processed workpiece 5 is taken out. The entire waste edge cutting process is completed, and the next processing cycle begins.

[0036] The high-speed cold heading machine waste edge cutting mechanism of this embodiment operates according to the process of positioning and clamping, mold closing, cutting, splitting, unloading, and resetting, realizing efficient cutting and automatic unloading of the annular waste edge 501. It effectively solves the problem that the annular waste edge 501 is easily attached to the waste edge cutting component after cutting, resulting in low unloading efficiency, and effectively improves processing efficiency and workpiece quality.

[0037] The above description is only the best implementation method adopted in this application in combination with current practical needs, but the scope of protection of this application is not limited thereto.

Claims

1. A waste edge trimming mechanism for a high-speed cold heading machine, characterized in that, include: A frame (1) is provided with a fixed module (201), a feeding mechanism (301) and a moving module (401) in sequence on the frame (1). The fixed mold core (2) is set on the fixed mold assembly (201) and is used to position one end of the workpiece (5); The clamping mechanism (3) is set on the feeding mechanism (301) and includes three sets of radial slides (31) evenly distributed at equal angles. The inner side of the radial slides (31) is provided with a clamping groove (34) for clamping the workpiece (5). One end of the workpiece (5) is provided with a cold heading end (51). The cold heading end (51) is provided with an annular waste edge (501) formed after cold heading. The clamping groove (34) is provided with an inner punching table (33) at the end near the moving module (401). The moving die core (4) is set on the moving module (401) and includes a die base (41) and a punching die core sleeve (43) slidably connected in the die base (41). The punching die core sleeve (43) is provided with an outer punching ring (431) at one end opposite to the feeding mechanism (301). The outer punching ring (431) is arranged opposite to the inner punching table (33), and the outer punching ring (431) can approach the inner punching table (33) along the axial direction and be sleeved on the outside of the inner punching table (33). The relative displacement of the two forms a shearing force, which is used to cut off the annular waste edge (501) on the cold heading end (51).

2. The waste edge trimming mechanism of the high-speed cold heading machine according to claim 1, characterized in that, The moving mold core (4) also includes an ejector rod (44), which is slidably connected to the mold base (41). A return spring (45) is clamped between one end of the ejector rod (44) and the mold base (41). The return spring (45) has a spring force that drives the ejector rod (44) to return to the direction of the feeding mechanism (301). The other end of the top die rod (44) is fixed with a cavity (441) that matches the cold heading end (51) for positioning and fitting the cold heading end (51) and assisting in the shearing of the annular waste edge (501).

3. The waste edge trimming mechanism of the high-speed cold heading machine according to claim 2, characterized in that, The punching die core sleeve (43) is slidably sleeved on the outside of the ejector die rod (44). The end of the punching die core sleeve (43) away from the outer punching ring (431) is provided with a drive ring sleeve (433). The drive ring sleeve (433) and the punching die core sleeve (43) are fixedly connected by several connecting rods (434) that are evenly distributed at equal angles. The outer wall of the die base (41) is provided with a cutting edge groove (411) for the connecting rods (434) to cooperate. The drive ring sleeve (433) is slidably sleeved on one side of the outer wall of the mold base (41). A reset spring (46) is clamped between the drive ring sleeve (433) and the outer wall of the mold base (41). The drive ring sleeve (433) realizes the axial displacement action corresponding to the mold base (41) through the drive mechanism.

4. The waste edge trimming mechanism of the high-speed cold heading machine according to claim 3, characterized in that, The mold base (41) is also fixed with a mold closing sleeve (42) at one end near the feeding mechanism (301). The mold closing sleeve (42) has a mold closing groove (421) at its end. The radial slide (31) has a mold closing boss (32) that cooperates with the mold closing groove (421) at its end. When the feeding mechanism (301) and the moving mold assembly (401) close the mold, the mold closing boss (32) is embedded in the mold closing groove (421) to realize the positioning of the radial slide (31) and the mold closing sleeve (42) and improve the clamping stability of the clamping mechanism (3).

5. The waste edge trimming mechanism of the high-speed cold heading machine according to claim 4, characterized in that, The mold closing boss (32) and the inner punching table (33) are provided with a material ejection ramp (37) that is inclined in the direction away from the workpiece (5). The inclination angle of the material ejection ramp (37) is 30°-60°. The middle part of the material ejection ramp (37) is provided with a slitting blade (35) that extends radially and faces the punching die core sleeve (43). The end of the punching die core sleeve (43) is provided with a slitting groove (432) that cooperates with the slitting blade (35). When slitting, the slitting blade (35) is embedded in the slitting groove (432).

6. The waste edge trimming mechanism of the high-speed cold heading machine according to claim 5, characterized in that, The three sets of radial slides (31) are engaged and clamped or moved away from the material by the second drive mechanism; The cutting blade (35) is also provided with two sets of corner grooves (36) on both sides. The cutting blade (35) and the cutting groove (432) are used to cut the cut-off annular waste edge (501) into three sets of fan-shaped waste edges (502). The corner grooves (36) are used to attach to the inner arc end of the fan-shaped waste edge (502).

7. The waste edge trimming mechanism of the high-speed cold heading machine according to claim 6, characterized in that, The end of the ejector rod (44) away from the cavity (441) is fixed with a limiting slider (442). The mold base (41) is provided with a limiting groove (412) that cooperates with the limiting slider (442). After the moving mold assembly (401) and the feeding mechanism (301) are fully engaged, the cold heading end (51) is clamped between the cavity (441) and the inner punching table (33). At this time, the reset spring (45) is in a compressed state, and the limiting slider (442) is displaced to the maximum stroke in the limiting groove (412).

8. The waste edge trimming mechanism of the high-speed cold heading machine according to claim 7, characterized in that, After the feeding mechanism (301) and the moving module (401) are fully engaged, the driving ring sleeve (433) continues to move closer to the feeding mechanism (301) through the driving mechanism. The driving ring sleeve (433) sequentially drives the outer punching ring (431) and the inner punching table (33) to engage and interlock, so that the annular waste edge (501) is sheared. It also drives the slitting groove (432) and the slitting knife (35) to engage, so that the annular waste edge (501) is cut into three sets of fan-shaped waste edges (502). At this time, the second reset spring (46) is in a compressed state, and the driving ring sleeve (433) moves relative to the mold base (41) to the maximum stroke.

9. The waste edge trimming mechanism of the high-speed cold heading machine according to claim 8, characterized in that, The end of the punching die core sleeve (43) is also provided with an inclined inner cavity (435) corresponding to the ejection ramp (37). By the engagement of the inclined inner cavity (435) and the ejection ramp (37), the cut fan-shaped waste edge (502) is pressed from a planar state into an inclined state that fits the surface of the ejection ramp (37). When the three sets of radial slides (31) are gradually separated, the fan-shaped waste edge (502) hanging in the corner groove (36) is stretched and deformed to store energy. When the fan-shaped waste edge (502) is separated from the corner groove (36), the elastic potential energy of the fan-shaped waste edge (502) is released, causing the fan-shaped waste edge (502) to pop out along the ejection ramp (37) and complete the automatic ejection.

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