A knuckle fork disposable cold forging equipment and a cold forging method thereof

Abstract

The application discloses a kind of knuckle fork disposable cold forging equipment and its cold forging method, specifically related to cold forging processing technical field, including cold forging machine, and the bottom die assembly of cold forging is placed in the inside of the forging and pressing base of cold forging machine, the bottom die assembly of cold forging includes template, two groups of limit support are connected between the template, the two sides of the template are provided with pusher assembly and drilling assembly.The material is formed after being waited, hydraulic cylinder is retracted to drive positioning top plate seat to move up, moves toothed plate and is driven gear ring reverse, guides push sleeve reset, its push surface and push plate inclined surface contact, push push plate reverse rotation, drive push rod push perforating column along the helical sliding groove of limit tube helical rotation, simultaneously complete perforating and tapping operation, the whole process does not need manual intervention to switch process, realize seamless connection of forming and hole processing.

Description

Technical Field

[0001] This application relates to the field of cold forging technology, and more specifically, to a one-time cold forging equipment and method for a steering knuckle fork. Background Technology

[0002] Cold forging is a processing technology in which pressure is applied to a metal billet through a die at room temperature to cause plastic deformation and obtain parts with the desired shape and performance. A search revealed that publication number CN105583340A discloses a cold forging fixture, including a worktable and a top plate. At least two support beams are fixed between the top plate and the worktable. A motor is located at the lower end of the top plate, and a telescopic column is connected to the lower end of the motor. An upper worktable is fixed to the lower part of the telescopic column. A fixed column is fixed to the middle of the bottom surface of the upper worktable, and a pressing column is connected to the lower end of the fixed column. A pressing head is located at the bottom end of the pressing column. Sliding control columns are located on both sides of the bottom surface of the upper worktable. A fixed platform is fixed to the worktable, and a lower worktable is fixed to the fixed platform. A housing is fixed to the lower worktable, and a base is located at the bottom inside the housing. A placement platform is fixed to the middle of the base, and a placement column is fixed to the placement platform. Sealing plates are located on both sides of the housing. A first hole is located above the sealing plate, and a second hole is located inside the sealing plate. A sliding column passes through the second hole, and a processing table is fixed to one end of the sliding column outside the sealing plate. This fixture is stable, ingenious, convenient, and quick to operate, facilitating the cold forging of standard parts. The inventors discovered the following problems with the prior art during the development of this application: Traditional methods require multiple machines or multiple clamping operations to complete forging, piercing, and tapping. Furthermore, traditional open dies are prone to damage due to uneven loading, leading to defects such as incomplete filling of parts. Meanwhile, cold forging equipment typically has a low level of automation and relies heavily on manual labor; traditional secondary processing often requires manual operation or additional equipment. Therefore, in response to the above problems, a one-time cold forging equipment and cold forging method for steering knuckle forks are proposed. Summary of the Invention

[0003] In order to overcome the above-mentioned defects of the prior art, this application provides a one-time cold forging equipment and cold forging method for steering knuckle forks to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this application provides the following technical solution: a one-time cold forging equipment for steering knuckle forks, including a cold forging machine, a forging base placed at the forging point of the cold forging machine, a cold forging bottom die assembly placed inside the forging base, the cold forging bottom die assembly including a template, a limit bracket connected between two sets of templates, and a pushing component and a drilling component provided on both sides of the template.

[0005] Preferably, the drilling assembly includes a push plate, a movable shaft, and a push rod, wherein the movable shaft is movably connected to the side of the push plate, and the push rod is installed at the edge of the movable shaft.

[0006] Preferably, the drilling assembly further includes a limiting tube, a spiral sliding groove, a perforating column, and a perforating threaded head. The pushing rod is located inside the tube body of the limiting tube. The outer wall surface of the limiting tube is provided with a spiral sliding groove. The perforating column is placed inside the limiting tube. The perforating column and the pushing rod are fixedly connected. A perforating threaded head is provided at the end of the perforating column away from the pushing rod.

[0007] Preferably, a cold forging production groove is provided at the forging center of the template, and perforation grooves are provided on both sides of the cold forging production groove. Material fixing rings are placed above the two sets of templates.

[0008] Preferably, the pushing assembly includes a gear ring, a screw, a guide pushing sleeve, a pushing surface, and a lifting surface. The gear ring is connected to the side of the screw, and the guide pushing sleeve is connected to the outer diameter surface of the screw. The two ends of the guide pushing sleeve are the pushing surface and the lifting surface, respectively.

[0009] Preferably, a hydraulic cylinder is provided below the top of the cold forging machine, a positioning top plate seat is provided at the bottom of the hydraulic cylinder, an extrusion column is provided at the bottom end of the positioning top plate seat, and a forging column is provided below the extrusion column.

[0010] Preferably, the positioning top plate seat is provided with first sliding grooves at both ends, and forging limiting plates are provided on both sides of the positioning top plate seat located on the extrusion column. A drilling blocking column is connected to the bottom of the forging limiting plate, and a movable toothed plate is provided on the side of the drilling blocking column.

[0011] Preferably, the forging base has two sets of insertion holes on both sides, a reserved groove between the two sets of insertion holes, a placement groove at the center of the forging base, and a guide column slidably connected inside the insertion hole.

[0012] Preferably, the limiting bracket includes a connecting block, with docking blocks movably connected to both sides of the connecting block, docking columns connected to the sides of the docking blocks, a connecting plate fixedly connected to one end of the docking column, and telescopic rods provided on both sides of the connecting plate at the docking column.

[0013] Preferably, a cold forging method for a steering knuckle fork using a one-time cold forging equipment includes the following steps: Step 1: First, place the material above the material fixing ring, so that the material is in the center of the two sets of templates. Then, the hydraulic cylinder of the cold forging machine drives the positioning top plate seat to move downward, and at the same time, the drilling blocking column moves downward and pushes the template to close towards the center. Then, the forging limit plate is inserted into the empty placement groove between the forging base and the cold forging bottom mold assembly, so that the two sets of templates are completely in contact. Step 2: During the movement of the forging limit plate, the moving toothed plate set on its positioning top plate seat drives the gear ring of the push assembly to rotate, thereby driving the screw to rotate. During the rotation of the screw, the guide push sleeve on the screw moves along the screw, and then the lifting surface of the guide push sleeve lifts the push plate and continues to pass through. The forging column squeezes the material into the cold forging production groove of the template and forms it. The distance it moves allows the guide push sleeve to pass through the push plate. Step 3: Then the positioning top plate seat moves upward, and drives the forging limit plate to move upward and disengage from the placement groove. After that, the limit bracket inside the template is pushed by the telescopic rod, so that the limit bracket unfolds and pushes the two sets of templates to separate at equal distances. It is restricted by the drilling blocking column. Then the moving tooth plate follows the positioning top plate seat to reset. At this time, during the upward movement of the moving tooth plate, it drives the gear ring to rotate in reverse and causes the guide push sleeve on the screw to reset. During the reset process, the pushing surface of the guide push sleeve contacts the inclined surface of the push plate of the drilling assembly. Step 4: As the drilling assembly push plate is pushed, it drives the piercing column connected to the push rod to rotate along the guide spiral of the spiral sliding groove in the limiting tube, and pierces the cold-forged part. During the piercing process, the thread inside the hole is drilled out. Because the template has expanded a part of the space, the part is still restricted by the template. After the piercing is completed, the drilling assembly is reset and the material is replaced on the material fixing ring.

[0014] The technical effects and advantages of this application are as follows: 1. Compared with the prior art, the new one-time cold forging equipment and method for steering knuckle forks achieves one-time integrated operation of cold forging and piercing / tapping of steering knuckle forks, eliminating the need for separate equipment and processes. After the cold forging machine is started, the hydraulic cylinder of the cold forging machine extends, driving the positioning top plate seat to move down. On the one hand, the positioning top plate seat pushes the forging column through the extrusion column, extruding the material into the cold forging production groove of the cold forging bottom die assembly, completing the initial contour forming of the steering knuckle fork. On the other hand, when the positioning top plate seat moves down, it drives the moving toothed plate to move down synchronously. The moving toothed plate meshes with the gear ring of the pushing assembly, driving the gear ring to rotate and driving the screw to rotate, so that the guide pushing sleeve sleeved on the screw moves closer to the drilling assembly. At this point, the lifting surface of the guide sleeve contacts the push plate of the drilling assembly. The push plate tilts around the movable shaft, causing the push rod and the perforating column to move away from the template, thus avoiding interference with the material forming. After the material is formed, the hydraulic cylinder retracts, causing the positioning top plate seat to move upward. The moving toothed plate moves upward and drives the gear ring to reverse, resetting the guide sleeve. Its push surface contacts the inclined surface of the push plate, causing the push plate to rotate in the opposite direction. This drives the push rod to push the perforating column to rotate spirally along the spiral sliding groove of the limiting tube, simultaneously completing the perforation and tapping operations. The entire process does not require manual intervention to switch processes, achieving seamless connection between forming and hole processing.

[0015] 2. Compared with existing technologies, this one-time cold forging equipment and method for steering knuckle forks, before operation, the material fixing ring constrains the material to be processed directly above the center of the two sets of templates, ensuring that the center of the material is aligned with the center of the cold forging production groove. After starting the equipment, the hydraulic cylinder drives the positioning top plate seat to move down, and the forging limiting plates at both ends of the positioning top plate seat slide down along the first sliding groove and insert into the placement groove of the forging base. The drilled blocking column at the bottom pushes the two sets of templates to close towards the center. Combined with the auxiliary constraint of the limiting bracket, a closed forming cavity is formed, preventing the material from deviating due to cavity deviation during the forging process. Misalignment leads to deviations in forming dimensions. During the forging stage, the guide sleeve controls the piercing column to move away from the cavity through the lifting surface to prevent interference between parts. After forming, the telescopic rod of the limiting bracket extends and, through the linkage of the connecting plate, the docking column, and the docking block, pushes the two sets of templates to separate smoothly while maintaining the part in a partially wrapped state to prevent the part from shifting. During drilling, the piercing column moves along the spiral sliding groove of the limiting tube. The limiting tube provides a guide for the movement of the piercing column, and the spiral sliding groove ensures that the spiral rotation trajectory of the piercing column is stable, so that the piercing thread head can complete piercing and tapping at the designated position on the part. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this application; Figure 2 This is a schematic diagram of the structure of the hydraulic cylinder of this application; Figure 3 This is a schematic diagram of the forged limiting plate of this application; Figure 4This is a schematic diagram of the drilling assembly of this application; Figure 5 This is a schematic diagram of the cold forging bottom die assembly of this application; Figure 6 This is a schematic diagram of the cold forging production tank of this application; Figure 7 This is a schematic diagram of the structure of the limiting bracket in this application; Figure 8 This is a schematic diagram of the steering knuckle fork structure produced by cold forging according to this application.

[0017] The attached figures are labeled as follows: 1. Cold forging machine; 2. Forging base; 3. Guide column; 4. Positioning top plate seat; 401. First sliding groove; 5. Hydraulic cylinder; 6. Insertion hole; 7. Reserved groove; 8. Placement groove; 9. Extrusion column; 10. Forging column; 11. Forging limit plate; 12. Drilling blocking column; 13. Moving toothed plate; 14. Pushing assembly; 15. Gear ring; 16. Screw; 17. Guide pushing sleeve; 1701. Pushing surface; 1702. Warping 18. Lifting surface; 19. Drilling assembly; 20. Push plate; 21. Movable shaft; 22. Push rod; 23. Limiting tube; 24. Spiral sliding groove; 25. Piercing column; 26. Piercing thread head; 27. Cold forging bottom die assembly; 28. Template; 29. ​​Piercing groove; 30. Cold forging production groove; 31. Limiting bracket; 32. Connecting block; 33. Butt joint block; 34. Butt joint column; 35. Connecting plate; 36. Telescopic rod; 37. Material fixing ring. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0019] Example 1 As attached Figures 1 to 8 The present invention relates to a one-time cold forging equipment for steering knuckle forks, including a cold forging machine 1, a forging base 2 placed at the forging point of the cold forging machine 1, a cold forging bottom die assembly 26 placed inside the forging base 2, the cold forging bottom die assembly 26 including a template 27, a limit bracket 29 connected between two sets of templates 27, and a pushing assembly 14 and a drilling assembly 18 provided on both sides of the template 27.

[0020] Before operation, the material to be processed is placed above the material fixing ring 35. The material fixing ring 35 constrains the material to be directly above the center of the two sets of templates 27, ensuring that its center is aligned with the center of the cold forging production tank 28. At this time, the two sets of templates 27 are slightly separated, the telescopic rod 34 of the limiting bracket 29 is retracted, and the drilling assembly 18 and the pushing assembly 14 are in the initial position. The equipment is started, the hydraulic cylinder 5 of the cold forging machine 1 extends, driving the positioning top plate seat 4 to move down, the forging limiting plate 11 slides down along the first sliding groove 401, the drilling blocking column 12 pushes the two sets of templates 27 to close, forming a closed forming cavity, and the forging column 10 squeezes the material into the cold forging production tank 28. The material is formed into the preliminary outline of the steering knuckle fork. During this process, the moving tooth plate 13 moves down, driving the gear ring 15 to rotate, so that the guide pushing sleeve 17 approaches the drilling assembly 18. When the sleeve is raised and the lifting surface 1702 contacts the push plate 19, the push plate 19 is raised, which drives the push rod 21 and the perforating column 24 away from the template 27 to avoid interfering with the forming. Then, after the material is formed, the hydraulic cylinder 5 retracts, the positioning top plate seat 4 moves up, releases the template 27 from closing constraints, the telescopic rod 34 of the limit bracket 29 extends, pushes the template 27 to separate, and the part is partially wrapped. At the same time, the moving tooth plate 13 moves up, drives the gear ring 15 to reverse, guides the push sleeve 17 to reset, and after the push surface 1701 of the push sleeve 17 contacts the inclined surface of the push plate 19, the push plate 19 rotates in the opposite direction, drives the perforating column 24 to move and rotate spirally, and completes the perforation and tapping operations. Once the operation is complete, the guide push sleeve 17 resets, the drilling assembly 18 returns to its initial state, the limit bracket 29 and telescopic rod 34 retract, the template 27 closes, the operator removes the parts, places new materials, and the equipment enters the next production cycle.

[0021] In a preferred embodiment, the drilling assembly 18 includes a push plate 19, a movable shaft 20, and a push rod 21. The side of the push plate 19 is movably connected to the movable shaft 20. The push plate 19 in the drilling assembly 18 is a power receiving component, and its side is connected to the cold forging machine 1 via the movable shaft 20. The movable shaft 20 allows the push plate 19 to rotate around a fixed point, ensuring that the push plate 19 can receive the driving force from the push assembly 14. The push rod 21 is installed at the edge of the movable shaft 20. The drilling assembly 18 also includes a limiting tube 22, a spiral sliding groove 23, a piercing column 24, and a piercing thread head 25. The push rod 21 is located inside the tube body of the limiting tube 22. The end of the push plate 19 away from the movable shaft 20 is fixedly connected to the push rod 21. When the push plate 19 rotates, it can synchronously drive the push rod 21 to move axially, transmitting power to the subsequent piercing structure. Then, the limiting tube 22 provides a moving guide for the push rod 21 and the piercing column 24, preventing the components from malfunctioning during operation. The push rod 21 is offset by a spring sleeved on its outer surface. The spring is compressed when subjected to force, and then the spring drives the push rod 21 to return to its original position after the compression force disappears. The outer wall surface of the limiting tube 22 is provided with a spiral sliding groove 23, and a perforated column 24 is placed inside the limiting tube 22. The perforated column 24 and the push rod 21 are fixedly connected. The end of the perforated column 24 away from the push rod 21 is provided with a perforated thread head 25. The spiral sliding groove 23 on the outer wall surface of the limiting tube 22 provides trajectory constraints for the movement of the perforated column 24, ensuring that the perforated column 24 can move along the spiral path. When the push rod 21 drives the perforated column 24 to move, the perforated column 24 will synchronously rotate under the guidance of the spiral sliding groove 23, so that the perforated thread head 25 can not only penetrate the cold-forged part to complete the perforation, but also return to its original position through the internally compressed spring after drilling, driving the perforated column to return to its original position, and can also simultaneously process threads on the inner wall of the hole during the perforation process, realizing the integrated operation of perforation and tapping.

[0022] In a preferred embodiment, a cold forging production groove 28 is provided at the forging center of the template 27, and perforation grooves 2701 are provided on both sides of the cold forging production groove 28. Material fixing rings 35 are placed above the two sets of templates 27.

[0023] In a preferred embodiment, the pushing component 14 is installed on the side of the template 27, adjacent to the drilling component 18. Its core function is to provide driving power for the drilling component 18, and it can switch the transmission mode of driving force according to the equipment operation stage. The pushing component 14 includes a gear ring 15, a screw 16, a guide pushing sleeve 17, a pushing surface 1701, and a lifting surface 1702. The gear ring 15 is the core of the component's power receiving, and its teeth mesh with the moving toothed plate 13 on the subsequent positioning top plate seat 4. The movement of the moving toothed plate 13 can drive the gear ring 15 to rotate. When the gear ring 15 rotates, it will synchronously drive the screw 16 to rotate, converting the rotational power into the linear movement power of the subsequent components. The screw 16 is connected to the side of the gear ring 15, and the guide pushing sleeve 17 is connected to the outer diameter surface of the screw 16. The guide sleeve 17 is sleeved on the outer diameter surface of the screw 16 and connected to the screw 16 by a threaded engagement. When the screw 16 rotates, the guide push sleeve 17 will move linearly along the axial direction of the screw 16. The two ends of the guide push sleeve 17 are a push surface 1701 and a lifting surface 1702, respectively. The two end faces are designed as a push surface 1701 and a lifting surface 1702, which are adapted to the needs of different operating stages of the drilling assembly 18. The lifting surface 1702 is used to lift the push plate 19 of the drilling assembly 18 upward during the forging stage of the equipment, so that the guide push sleeve 17 can move normally without affecting the drilling assembly 18. The push surface 1701 is used to contact the inclined surface of the push plate 19 during the equipment reset stage, pushing the push plate 19 to rotate and providing driving force for the drilling operation of the drilling assembly 18.

[0024] In a preferred embodiment, a hydraulic cylinder 5 is provided below the top of the cold forging machine 1, a positioning top plate seat 4 is provided at the bottom of the hydraulic cylinder 5, an extrusion column 9 is provided at the bottom end of the positioning top plate seat 4, and a forging column 10 is provided below the extrusion column 9. The hydraulic cylinder 5 of the cold forging machine 1 is the core power source of the equipment, and its output end is fixedly connected to the positioning top plate seat 4. The extension and retraction of the hydraulic cylinder 5 can drive the positioning top plate seat 4 to move up and down in the vertical direction, and transmit power to the various execution components below. The extrusion column 9 is fixedly installed at the center of the bottom end of the positioning top plate seat 4, and the extrusion column 9 is connected to the forging column 10 below. When the positioning top plate seat 4 moves downward, the extrusion column 9 will simultaneously push the forging column 10 downward, extruding the material placed on the template 27 into the cold forging production tank 28 to complete the cold forging forming. The first sliding groove 401 at both ends of the positioning top plate seat 4 provides a moving guide for the forging limit plates 11 on both sides, ensuring that the forging limit plates 11 can slide up and down along a fixed trajectory.

[0025] In a preferred embodiment, the positioning top plate seat 4 is provided with first sliding grooves 401 at both ends. The positioning top plate seat 4 is provided with forging limiting plates 11 on both sides of the extrusion column 9. The bottom of the forging limiting plate 11 is connected to a drilling blocking column 12. The side of the drilling blocking column 12 is provided with a moving toothed plate 13. When the positioning top plate seat 4 moves downward, the forging limiting plate 11 will move downward and insert into the placement groove 8 between the forging base 2 and the cold forging bottom die assembly 26. Through physical limiting, the two sets of templates 27 are pushed to close towards the center, ensuring that the templates 27 fit tightly and preventing the material from shifting during the forming process, thus maintaining a stable constraint environment. The drilling blocking column 12 plays a limiting role during the separation stage of the templates 27, preventing the templates 27 from over-expanding and causing the parts to detach from the constraint.

[0026] In a preferred embodiment, the forging base 2 is the supporting foundation of the cold forging machine 1. The guide column 3 can slide up and down along the insertion hole 6 to assist in adjusting the position of the forging base 2 during the operation of the cold forging machine 1 and enhance the stability of the base. Two sets of insertion holes 6 are provided on both sides of the forging base 2, and a reserved groove 7 is provided between the two sets of insertion holes 6. The reserved groove 7 is used to avoid the movement path of each component during the operation of the equipment and avoid interference between components. A placement groove 8 is provided at the center of the forging base 2. The guide column 3 is slidably connected inside the insertion hole 6. The placement groove 8 opened at the center of the forging base 2 provides installation and positioning space for the cold forging bottom die assembly 26 and can also accommodate the insertion of the forging limiting plate 11, ensuring that the forging limiting plate 11 can close and constrain the template 27.

[0027] In a preferred embodiment, the limiting bracket 29 is installed between the two sets of templates 27 and is the core structure for controlling the opening and closing of the templates 27. The connecting block 30 at its center is the fixed base of the bracket. The limiting bracket 29 includes the connecting block 30, and the two sides of the connecting block 30 are movably connected to the docking block 31. The docking block 31 can rotate around the connecting block 30. The side of the docking block 31 is connected to the docking column 32. One end of the docking column 32 is fixedly connected to the connecting plate 33, which is in contact with the inner wall of the template 27. The connecting plate 33 is provided with telescopic rods 34 on both sides of the docking column 32. The telescopic rods 34 can drive the connecting plate 33 to move in the horizontal direction. Then, through the linkage of the docking column 32 and the docking block 31, the two sets of templates 27 are pushed to separate or close. When the telescopic rod 34 extends, the connecting plate 33 drives the docking column 32 to move outward, pushing the two sets of templates 27 to separate. When the telescopic rod 34 retracts, the templates 27 close under the action of external constraint.

[0028] As a preferred embodiment, a cold forging method for a steering knuckle fork one-time cold forging equipment includes the following steps: Step 1: First, place the material above the material fixing ring 35, so that the material is located at the center of the two sets of templates 27. Then, the hydraulic cylinder 5 of the cold forging machine 1 drives the positioning top plate seat 4 to move downward, and at the same time, the drilling blocking column 12 moves downward and pushes the template 27 to close towards the center. Then, the forging limit plate 11 is inserted into the empty placement groove 8 between the forging base 2 and the cold forging bottom mold assembly 26, so that the two sets of templates 27 are completely fitted together. Step 2: During the movement of the forging limit plate 11, the moving toothed plate 13 set on its positioning top plate seat 4 drives the gear ring 15 of the pushing assembly 14 to rotate, thereby driving the screw 16 to rotate. During the rotation of the screw 16, the guide pushing sleeve 17 on the screw 16 moves along the screw 16. Then, the lifting surface 1702 of the guide pushing sleeve 17 lifts the pushing plate 19 and continues to pass through. The forging column 10 squeezes the material into the cold forging production groove 28 of the template 27 and forms it. The distance it moves allows the guide pushing sleeve 17 to pass through the pushing plate 19. Step 3: Then the positioning top plate seat 4 moves upward, and drives the forging limiting plate 11 to move upward and disengage from the placement groove 8. After that, the limiting bracket 29 inside the template 27 is pushed by the telescopic rod 34, so that the limiting bracket 29 unfolds and pushes the two sets of templates 27 to separate at equal distances, and is restricted by the drilling blocking column 12. Then the moving tooth plate 13 follows the positioning top plate seat 4 to reset. At this time, during the upward movement of the moving tooth plate 13, it drives the gear ring 15 to rotate in reverse, and causes the guide pushing sleeve 17 on the screw 16 to reset. During the reset process, the pushing surface 1701 of the guide pushing sleeve 17 contacts the inclined surface of the pushing plate 19 of the drilling assembly 18. Step 4: Subsequently, the push plate 19 of the drilling assembly 18 is pushed, which drives the perforating column 24 connected to the push rod 21 to rotate along the guide spiral of the spiral sliding groove 23 in the limiting tube 22, and perforates the cold-forged part. During the perforation process, the threads in the hole are drilled out. Because the template 27 has unfolded a part of the space, the part is still restricted by the template 27. After the perforation is completed, the drilling assembly 18 is reset and the material is replaced on the material fixing ring 35.

[0029] The working process of this application is as follows: First, the material is placed above the material fixing ring 35, so that the material is located at the center of the two sets of templates 27. Then, the hydraulic cylinder 5 of the cold forging machine 1 drives the positioning top plate seat 4 to move downward, and the drilling blocking column 12 moves downward and pushes the template 27 to close towards the center. Then, the forging limit plate 11 is inserted into the empty placement groove 8 between the forging base 2 and the cold forging bottom mold assembly 26, and the two sets of templates 27 are completely fitted together. During the movement of the forging limit plate 11, the moving toothed plate 13 set on its positioning top plate seat 4 drives the gear ring 15 of the pushing assembly 14 to rotate, thereby driving the screw 16 to rotate. During the rotation of the screw 16, the guide pushing sleeve 17 on the screw 16 moves along the screw 16. Then, the lifting surface 1702 of the guide pushing sleeve 17 lifts the pushing plate 19 and continues to pass through. The forging column 10 squeezes the material into the interior of the cold forging production groove 28 of the template 27 and forms it. The distance it moves allows the guide pushing sleeve 17 to pass through the pushing plate 19. Then the positioning top plate seat 4 moves upward, and drives the forging limit plate 11 to move upward and disengage from the placement groove 8. After that, the limit bracket 29 inside the template 27 is pushed by the telescopic rod 34, so that the limit bracket 29 unfolds and pushes the two sets of templates 27 to separate at equal distances, and is restricted by the drilling blocking column 12. Then the moving tooth plate 13 follows the positioning top plate seat 4 to reset. At this time, during the upward movement of the moving tooth plate 13, it drives the gear ring 15 to rotate in reverse and causes the guide push sleeve 17 on the screw 16 to reset. During the reset process, the push surface 1701 of the guide push sleeve 17 contacts the inclined surface of the push plate 19 of the drilling assembly 18. Subsequently, as the pushing plate 19 of the drilling assembly 18 is pushed, it drives the perforating column 24 connected to the pushing rod 21 to rotate along the guide spiral of the spiral sliding groove 23 in the limiting tube 22, and perforates the cold-forged part. During the perforation process, the threads in the hole are drilled out. Because the template 27 has unfolded a portion of the space, the part is still restricted by the template 27. After the perforation is completed, the drilling assembly 18 is reset and the material is replaced on the material fixing ring 35. The above is the working principle of the one-time cold forging equipment and cold forging method of the steering knuckle fork.

Claims

1. A one-time cold forging equipment for steering knuckle forks, comprising a cold forging machine (1), characterized in that: The forging press of the cold forging machine (1) is provided with a forging base (2), and a cold forging bottom die assembly (26) is provided inside the forging base (2). The cold forging bottom die assembly (26) includes a template (27), and a limit bracket (29) is connected between the two sets of templates (27). A pushing assembly (14) and a drilling assembly (18) are provided on both sides of the template (27). The drilling assembly (18) includes a push plate (19), a movable shaft (20) and a push rod (21). The side of the push plate (19) is movably connected to the movable shaft (20), and the push rod (21) is installed at the edge of the movable shaft (20). The drilling assembly (18) also includes a limiting tube (22), a spiral sliding groove (23), a perforating column (24), and a perforating thread head (25). The push rod (21) is located inside the tube body of the limiting tube (22). The outer wall surface of the limiting tube (22) is provided with a spiral sliding groove (23). The perforating column (24) is placed inside the limiting tube (22). The perforating column (24) and the push rod (21) are fixedly connected. The end of the perforating column (24) away from the push rod (21) is provided with a perforating thread head (25). The pushing assembly (14) includes a gear ring (15), a screw (16), a guide pushing sleeve (17), a pushing surface (1701), and a lifting surface (1702). The gear ring (15) is connected to the side of the screw (16), and the outer diameter surface of the screw (16) is connected to the guide pushing sleeve (17). The two ends of the guide pushing sleeve (17) are the pushing surface (1701) and the lifting surface (1702), respectively. The limiting bracket (29) includes a connecting block (30), with docking blocks (31) movably connected to both sides of the connecting block (30), docking posts (32) connected to the sides of the docking blocks (31), and a connecting plate (33) fixedly connected to one end of the docking post (32). Telescopic rods (34) are provided on both sides of the connecting plate (33) located on the docking post (32).

2. The one-time cold forging equipment for steering knuckles and forks according to claim 1, characterized in that: A cold forging production groove (28) is provided at the forging center of the template (27), and perforation grooves (2701) are provided on both sides of the cold forging production groove (28). Material fixing rings (35) are placed above the two sets of templates (27).

3. The one-time cold forging equipment for steering knuckles and forks according to claim 2, characterized in that: A hydraulic cylinder (5) is provided below the top of the cold forging machine (1), a positioning top plate seat (4) is provided at the bottom of the hydraulic cylinder (5), an extrusion column (9) is provided at the bottom end of the positioning top plate seat (4), and a forging column (10) is provided below the extrusion column (9).

4. The one-time cold forging equipment for steering knuckle forks according to claim 3, characterized in that: The positioning top plate seat (4) is provided with a first sliding groove (401) at both ends. The positioning top plate seat (4) is provided with forging limit plates (11) on both sides of the extrusion column (9). The bottom of the forging limit plate (11) is connected to a drilling blocking column (12). The side of the drilling blocking column (12) is provided with a moving toothed plate (13).

5. A one-time cold forging equipment for steering knuckle forks according to claim 4, characterized in that: The forging base (2) has two sets of insertion holes (6) on both sides, and a reserved groove (7) is provided between the two sets of insertion holes (6). A placement groove (8) is provided at the center of the forging base (2), and a guide column (3) is slidably connected inside the insertion hole (6).

6. A cold forging method for a one-time cold forging equipment for steering knuckle forks, using the one-time cold forging equipment for steering knuckle forks as described in any one of claims 1-5, characterized in that: The cold forging method includes the following steps: Step 1: First, place the material above the material fixing ring (35) so that the material is located at the center of the two sets of templates (27). Then, the hydraulic cylinder (5) of the cold forging machine (1) drives the positioning top plate seat (4) to move downward, and the drilling blocking column (12) moves downward while pushing the template (27) to close towards the center. Then, the forging limit plate (11) is inserted into the empty placement groove (8) between the forging base (2) and the cold forging bottom mold assembly (26), and the two sets of templates (27) are completely fitted together. Step 2: During the movement of the forging limit plate (11), the moving toothed plate (13) set on its positioning top plate seat (4) drives the gear ring (15) of the push assembly (14) to rotate, thereby driving the screw (16) to rotate. During the rotation of the screw (16), the guide push sleeve (17) on the screw (16) moves along the screw (16). Then the lifting surface (1702) of the guide push sleeve (17) lifts the push plate (19) and continues to pass through. The forging column (10) squeezes the material into the cold forging production groove (28) of the template (27) and after forming, the distance it moves allows the guide push sleeve (17) to pass through the push plate (19). Step 3: Then the positioning top plate seat (4) moves upward and drives the forging limit plate (11) to move upward and disengage from the placement groove (8). After that, the limit bracket (29) inside the template (27) is pushed by the telescopic rod (34) to make the limit bracket (29) unfold and push the two sets of templates (27) to separate at equal distances and be restricted by the drilling blocking column (12). Then the moving tooth plate (13) follows the positioning top plate seat (4) to reset. At this time, during the upward movement of the moving tooth plate (13), it drives the gear ring (15) to rotate in reverse and makes the guide push sleeve (17) on the screw (16) reset. During the reset process, the push surface (1701) of the guide push sleeve (17) contacts the inclined surface of the push plate (19) of the drilling assembly (18). Step 4: Subsequently, the push plate (19) of the drilling assembly (18) is pushed, which drives the piercing column (24) connected to the push rod (21) to rotate along the spiral sliding groove (23) in the limiting tube (22) and pierce the cold-forged part. During the piercing process, the thread inside the hole is drilled out. Because the template (27) has unfolded a part of the space, the part is still restricted by the template (27). After the piercing is completed, the drilling assembly (18) is reset and the material is placed back on the material fixing ring (35).

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