Cold extrusion device for machining automobile shock absorber piston

Abstract

The invention discloses a cold extrusion device for machining an automobile shock absorber piston, and relates to the technical field of cold extrusion forming, the cold extrusion device comprises a forming die, a moving carrier and a machining guide rail, the moving carrier carries a piston block to be machined to circularly move along the machining guide rail, a hydraulic machine is arranged at the top of a base, and the hydraulic machine is connected with a cold pressing head; the forming die comprises an outer sleeve fixedly installed in the center of the base, an inner die cylinder is installed in the outer sleeve in a clamped mode, a lower supporting block is installed in the inner die cylinder in a matched mode, a bearing air cylinder is fixedly arranged on the base, the bearing air cylinder, the outer sleeve and the inner die cylinder are coaxially installed, and the upper end of the bearing air cylinder is connected with the lower supporting block. After the piston block is released through the moving carrier and enters the inner die barrel, the hydraulic machine drives the cold pressing head to push the piston block downwards, the piston block is combined with the lower supporting block for cold extrusion forming, and the piston block is pushed upwards through the bearing air cylinder and the lower supporting block after being subjected to cold extrusion forming and is captured again through the moving carrier.

Description

Technical Field

[0001] This invention relates to the field of cold extrusion molding technology, specifically a cold extrusion apparatus for processing automotive shock absorber pistons. Background Technology

[0002] Automotive shock absorber pistons typically consist of a piston body, piston rings, and valve plates. The piston body is generally a cylindrical metal component with multiple oil holes to control the flow of damping fluid. Piston rings are mounted on the outer circumference of the piston to provide a seal and prevent damping fluid leakage. Valve plates are installed on the oil holes of the piston to control the flow and pressure of the fluid according to different operating conditions.

[0003] Piston bodies are typically manufactured using cold extrusion molding, which effectively improves processing efficiency and quality. The piston body is then assembled to form the overall shock absorber. However, existing cold extrusion molding devices for piston bodies have low processing efficiency and consume significant time during loading and unloading. Therefore, this paper proposes a cold extrusion device for processing automotive shock absorber pistons to further improve processing efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a cold extrusion apparatus for processing automotive shock absorber pistons, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A cold extrusion device for processing automotive shock absorber pistons includes a base, a forming mold mounted on the base, a moving carrier and a processing guide rail mounted on the upper side of the forming mold, the moving carrier carrying the piston block to be processed moving cyclically along the processing guide rail, a hydraulic press mounted on the top of the base, the hydraulic press being connected to a cold pressing head, the forming mold including an outer sleeve fixedly mounted at the center of the base, an inner mold cylinder fitted inside the outer sleeve, a lower support block fitted inside the inner mold cylinder, a support cylinder fixedly mounted on the base, the support cylinder being coaxially mounted with the outer sleeve and the inner mold cylinder, the upper end of the support cylinder being connected to the lower support block, after the piston block is released into the inner mold cylinder by the moving carrier, the hydraulic press drives the cold pressing head to push the piston block downward and cold extrude it in conjunction with the lower support block, after the piston block is cold extruded, it is pushed upward by the support cylinder and the lower support block and recaptured by the moving carrier.

[0007] As a further embodiment of the present invention: the outer sleeves are arranged in a symmetrical combination, the inner ring of the outer sleeves is provided with a locking groove, the outer side of the inner mold cylinder is provided with a mating outer ring that cooperates with the locking groove, and the upper end of the inner mold cylinder is provided with an inner chamfer.

[0008] As a further embodiment of the present invention: a docking flange is fixedly installed on the base, a positioning component is installed inside the docking flange, and the outer sleeve is fixedly connected to the base and the docking flange through the positioning component. The positioning component includes an installation sleeve located at the central axis of the docking flange, an annular sleeve is fixedly installed on the installation sleeve, a distribution tube is evenly arranged on the outer ring of the annular sleeve, a snap-fit ​​part is connected to the end of the distribution tube, a vertical sleeve is connected to the bottom of the annular sleeve, a lifting piston rod is fitted inside the vertical sleeve, a plurality of lifting hydraulic cylinders are fixedly installed inside the docking flange, a lifting ring is connected to the end of the lifting hydraulic cylinder, the bottom of the lifting piston rod is connected to the lifting ring, and the lifting hydraulic cylinders are connected in series and connected by hydraulic oil pipes.

[0009] As a further embodiment of the present invention: the inside of the snap-fit ​​part is provided with a hydraulic groove, the dispersion tube is inserted into the hydraulic groove, pressure plates are provided on the upper and lower sides of the end of the snap-fit ​​part, ball bearings are fastened between the pressure plates and the snap-fit ​​part, a support spring is provided between the ball bearings, and the inner side of the outer sleeve is provided with a groove that cooperates with the snap-fit ​​part.

[0010] As a further embodiment of the present invention: the mobile carrier includes a mobile plate, the central part of which cooperates with the piston block to be processed, a connecting rope is provided between the mobile plates of the multiple mobile carriers, the bottom of the mobile plate is engaged with the processing guide rail, two sets of sliding grooves are symmetrically arranged on the upper side of the mobile plate, a sliding shaft is provided in the sliding groove, a sliding bracket is slidably installed on the sliding shaft, the bottom of the sliding bracket supports the lower side of the piston block, a return spring is provided on the sliding shaft, and a connecting frame is provided between the sliding brackets on both sides.

[0011] As a further embodiment of the present invention: a fixing frame is provided on the upper side of the base, and a push-pull motor is provided on the fixing frame, with the end of the push-pull motor in contact with the connecting frame.

[0012] As a further embodiment of the present invention: a guide assembly is provided on the top of the molding die, the guide assembly includes guide grooves symmetrically arranged on the top of the molding die, the inner edge of the guide groove is connected to the upper port of the inner mold cylinder, a rotating shaft is provided on the edge of the guide groove, the guide groove is rotatably installed between the rotating shaft and the fixed frame, a sector gear is provided on the rotating shaft, the sector gears between the two rotating shafts mesh with each other, and a drive motor is connected to one of the rotating shafts.

[0013] As a further embodiment of the present invention: the four corners of the bottom of the movable plate are provided with a first snap-fit ​​groove, a first snap-fit ​​plate is slidably installed in the first snap-fit ​​groove, the bottom of the first snap-fit ​​plate is provided with a second snap-fit ​​groove, a second snap-fit ​​plate is slidably installed in the second snap-fit ​​groove, the second snap-fit ​​plate is perpendicular to the first snap-fit ​​plate, the bottom of the second snap-fit ​​plate is provided with a mating head, and the mating head is slidably fitted with the processing guide rail.

[0014] As a further embodiment of the present invention: a damping rubber is provided between the center of the moving plate and the piston block.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] (1) The piston block to be processed is transported to the forming mold station by a moving carrier. With the cooperation of the hydraulic press and the cold pressing head, the piston block on the moving carrier is pushed into the forming mold. The piston block falls into the inner mold cylinder. The cold pressing head drives the piston block to move down, and together with the bottom support block, the piston block is cold extruded and formed. After the piston block is cold extruded and formed, the hydraulic press drives the cold pressing head to rise back to the initial height. The formed piston block moves upward under the drive of the support cylinder and the bottom support block, so that the piston block is separated from the inner mold cylinder and returns to the height of the moving carrier. The processed piston block is recaptured by the moving carrier and moves along the processing guide rail, driving the next piston block to move. The piston block is cold-extruded. During the entire cold extrusion process, each individual moving carrier carries the piston block to be processed to the top of the forming mold. The lower support block is controlled to abut against the bottom of the piston block for support. After the piston block enters the inner mold cylinder, it is immediately cold-extruded. The piston block then returns to its initial height and is captured again by the moving carrier. In the entire processing process and the process of entering the next piston block, the loading and unloading efficiency is effectively improved. This avoids the process of using a robot to load and unload piston blocks and switch piston blocks in the traditional process, shortens the processing time interval between adjacent piston blocks, and further improves the overall processing efficiency.

[0017] (2) The outer sleeve formed by the combination and installation is combined with the inner mold to form a molding die. When the inner mold is worn, only the inner mold needs to be replaced. The inner mold is installed with the outer sleeve through the mating outer ring set on the outside, which ensures that the piston block can be smoothly removed from the inner mold after cold pressing. The upper end of the inner mold is provided with an inner chamfer to facilitate the piston block to be processed to enter the inner mold. At the same time, after the piston block leaves the inner mold after cold pressing, the lower support block can return smoothly into the inner mold, avoiding excessive wear on the edge of the lower support block.

[0018] (3) After the outer sleeve and inner mold sleeve are assembled into a whole, they are inserted into each other with the docking flange. At this time, the positioning component locks the outer sleeve and the docking flange together. After the outer sleeve and the docking flange are docked, the lifting hydraulic cylinder is extended by controlling the hydraulic oil pipe. At this time, the lifting ring is raised, which in turn drives the lifting piston rod to move upward, pushing the hydraulic oil in the vertical sleeve into the dispersion pipe, causing the end of the snap-fit ​​part to extend outward, thereby forming a snap-fit ​​with the inner side of the outer sleeve.

[0019] (4) The moving plate in the moving carrier moves cyclically along the machining guide rail. In order to ensure that the moving plate can move reliably in the arc area of ​​the machining guide rail, a snap-fit ​​plate 1 and a snap-fit ​​plate 2 are set at the bottom of the moving plate. The snap-fit ​​plate 1 and the snap-fit ​​plate 2 are set vertically. When the moving plate reaches the arc area at both ends of the machining guide rail, the mating head will adjust adaptively with the snap-fit ​​groove 1 and the snap-fit ​​groove 2, thereby ensuring that the moving plate moves smoothly along the machining guide rail. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 This is a schematic diagram of the connection structure between the molding die and the base in this invention.

[0022] Figure 3 This is a schematic diagram of the installation structure of the machining guide rail and the mobile carrier in this invention.

[0023] Figure 4 This is a schematic diagram of the internal structure of the molding die in this invention.

[0024] Figure 5 This is a schematic diagram of the cross-sectional structure of the inner mold cylinder in this invention.

[0025] Figure 6 This is a schematic diagram of the connection structure between the outer sleeve and the mating flange in this invention.

[0026] Figure 7 This is a schematic diagram of the positioning component in this invention.

[0027] Figure 8 for Figure 7 Enlarged structural diagram at point A in the middle.

[0028] Figure 9 This is a schematic diagram of the installation structure of the guide component in this invention.

[0029] Figure 10 This is a first-view structural diagram of the mobile vehicle in this invention.

[0030] Figure 11 This is a schematic diagram of the second-view structure of the mobile vehicle in this invention.

[0031] Figure 12 for Figure 11 Enlarged structural diagram at point B.

[0032] Figure 13 This is a schematic diagram of the structure of the guide component in this invention.

[0033] In the diagram: 1. Base; 10. Fixing frame; 2. Machining guide rail; 3. Moving carrier; 30. Moving plate; 300. Snap-fit ​​groove one; 301. Snap-fit ​​plate one; 302. Snap-fit ​​groove two; 303. Snap-fit ​​plate two; 304. Mating head; 31. Connecting rope; 32. Connecting frame; 33. Sliding bracket; 34. Slide groove; 35. Slide shaft; 36. Return spring; 4. Forming mold; 40. Outer sleeve; 400. Snap-fit ​​groove; 41. Inner mold cylinder; 410. Mating outer ring; 42. Positioning component; 420. Snap-fit ​​part; 4 200. Hydraulic groove; 4201. Pressure plate; 4202. Ball bearing; 4203. Support spring; 421. Annular sleeve; 422. Dispersion pipe; 423. Vertical sleeve; 424. Lifting piston rod; 425. Lifting ring; 428. Lifting hydraulic cylinder; 429. Hydraulic oil pipe; 43. Support cylinder; 44. Lower support block; 45. Mounting sleeve; 46. Connecting flange; 5. Guide assembly; 50. Guide groove; 51. Rotating shaft; 52. Sector gear; 53. Drive motor; 6. Hydraulic press; 60. Cold press head. Detailed Implementation

[0034] The technical solution of the present invention will be further described in detail below with reference to specific embodiments.

[0035] like Figures 1-4 As shown, a cold extrusion device for processing automotive shock absorber pistons includes a base 1, on which a forming mold 4 is mounted. A moving carrier 3 and a processing guide rail 2 are mounted on the upper side of the forming mold 4. The moving carrier 3 carries the piston block to be processed and moves it cyclically along the processing guide rail 2. A hydraulic press 6 is mounted on the top of the base 1, and a cold press head 60 is connected to the hydraulic press 6. The forming mold 4 includes an outer sleeve 40 fixedly installed at the center of the base 1, and an inner mold cylinder 41 is fitted inside the outer sleeve 40. A lower support block 44 is installed inside the mold cylinder 41. A support cylinder 43 is fixedly installed on the base 1. The support cylinder 43 is coaxially installed with the outer sleeve 40 and the inner mold cylinder 41. The upper end of the support cylinder 43 is connected to the lower support block 44. After the piston block is released into the inner mold cylinder 41 by the moving carrier 3, the hydraulic press 6 drives the cold press head 60 to push the piston block downward and combine it with the lower support block 44 for cold extrusion molding. After the piston block is cold-pressed, it is pushed upward by the support cylinder 43 and the lower support block 44 and recaptured by the moving carrier 3.

[0036] Specifically, the piston block to be processed is transported to the forming mold 4 station by the moving carrier 3. With the cooperation of the hydraulic press 6 and the cold pressing head 60, the piston block on the moving carrier 3 is pushed into the forming mold 4. The piston block falls into the inner mold cylinder 41. The cold pressing head 60 drives the piston block to move down, and works together with the bottom support block 44 to realize the cold extrusion forming of the piston block. After the piston block completes the cold extrusion forming, the hydraulic press 6 drives the cold pressing head 60 to rise back to the initial height. The formed piston block moves upward under the drive of the supporting cylinder 43 and the bottom support block 44, so that the piston block leaves the inner mold cylinder 41 and returns to the height of the moving carrier 3. The processed piston block is recaptured by the moving carrier 3 and moves along the processing guide rail 2, driving the next piston block to be cold extruded.

[0037] Throughout the cold extrusion process, each individual moving carrier 3 carries the piston block to be processed to the top of the forming mold 4. The lower support block 44 is controlled to abut against the bottom of the piston block for support. After the piston block enters the inner mold cylinder 41, it is immediately subjected to cold extrusion. The piston block then returns to its initial height and is captured again by the moving carrier 3. In the entire processing process and the process of entering the next piston block, the loading and unloading efficiency is effectively improved. This avoids the process of using a robot to load and unload piston blocks and switch piston blocks in the traditional process, shortens the processing time interval between adjacent piston blocks, and further improves the overall processing efficiency.

[0038] It should be noted that the mobile carrier 3 and the machining guide rail 2 are electrically driven, which drives the mobile carrier 3 to move cyclically along the machining guide rail 2. This technology is a mature existing technology. To avoid redundancy, the drive structure between the mobile carrier 3 and the machining guide rail 2 is not described in detail in this application.

[0039] At the same time, the moving carrier 3 stops when it reaches the processing station. It can be combined with the laser positioning technology. When each group of moving carriers 3 reaches the part of the forming mold 4, the moving carrier 3 is controlled to stop, and the cold pressing forming process is started.

[0040] Furthermore, such as Figure 4 , Figure 5 , Figure 6 As shown, the outer sleeve 40 is arranged in a symmetrical combination. The inner ring of the outer sleeve 40 is provided with a locking groove 400. The outer side of the inner mold cylinder 41 is provided with a mating outer ring 410 that cooperates with the locking groove 400. The upper end of the inner mold cylinder 41 is provided with an inner chamfer.

[0041] Specifically, the outer sleeve 40, formed by assembly, is combined with the inner mold sleeve 41 to form the molding die 4. When the inner mold sleeve 41 wears out, it only needs to be replaced. The inner mold sleeve 41 is installed with the outer sleeve 40 through a mating outer ring 410, ensuring that the piston block can smoothly disengage from the inner mold sleeve 41 after cold pressing. The upper end of the inner mold sleeve 41 has an inner chamfer to facilitate the entry of the piston block to be processed into the inner mold sleeve 41. At the same time, after the piston block leaves the inner mold sleeve 41 after cold pressing, the lower support block 44 can smoothly return to the inner mold sleeve 41, avoiding excessive wear on the edge of the lower support block 44.

[0042] Furthermore, such as Figure 1 , Figure 6 , Figure 7 As shown, a docking flange 46 is fixedly installed on the base 1. A positioning component 42 is installed inside the docking flange 46. The outer sleeve 40 is fixedly connected to the base 1 and the docking flange 46 through the positioning component 42. The positioning component 42 includes an installation sleeve 45 located at the central axis of the docking flange 46. An annular sleeve 421 is fixedly installed on the installation sleeve 45. Dispersion tubes 422 are evenly arranged on the outer ring of the annular sleeve 421. A snap-fit ​​part 420 is connected to the end of the dispersion tube 422. A vertical sleeve 423 is connected to the bottom of the annular sleeve 421. A lifting piston rod 424 is installed inside the vertical sleeve 423. Multiple sets of lifting hydraulic cylinders 428 are fixedly installed inside the docking flange 46. A lifting ring 425 is connected to the end of the lifting hydraulic cylinder 428. The bottom of the lifting piston rod 424 is connected to the lifting ring 425. The lifting hydraulic cylinders 428 are connected in series and connected by hydraulic oil pipes 429.

[0043] Specifically, after the outer sleeve 40 and the inner mold cylinder 41 are assembled into a whole, they are inserted into the mating flange 46. At this time, the positioning component 42 locks the outer sleeve 40 and the mating flange 46 together. After the outer sleeve 40 and the mating flange 46 are mated, the lifting hydraulic cylinder 428 is extended by the hydraulic oil pipe 429. This causes the lifting ring 425 to rise, which in turn causes the lifting piston rod 424 to move upward, pushing the hydraulic oil in the vertical sleeve 423 into the dispersion pipe 422. This causes the end locking part 420 to extend outward, thereby locking with the inside of the outer sleeve 40.

[0044] Furthermore, such as Figure 8 As shown, the snap-fit ​​part 420 has a hydraulic groove 4200 inside, the dispersion tube 422 is inserted into the hydraulic groove 4200, pressure plates 4201 are provided on the upper and lower sides of the end of the snap-fit ​​part 420, ball bearings 4202 are fastened between the pressure plates 4201 and the snap-fit ​​part 420, and a support spring 4203 is provided between the ball bearings 4202. The inner side of the outer sleeve 40 has a groove that cooperates with the snap-fit ​​part 420.

[0045] Specifically, when hydraulic oil is squeezed into the hydraulic groove 4200, it drives the snap-fit ​​part 420 to be pushed outward. At this time, the snap-fit ​​part 420 and the inner ring of the outer sleeve 40 snap together. Under the action of the support spring 4203, the ball 4202 locks with the inner side of the outer sleeve 40, preventing the molding die 4 from detaching as a whole.

[0046] Furthermore, such as Figure 9 , Figure 10 As shown, the mobile carrier 3 includes a moving plate 30, the center of which cooperates with the piston block to be processed. A connecting rope 31 is provided between the moving plates 30 of the multiple mobile carriers 3. The bottom of the moving plate 30 is engaged with the processing guide rail 2. Two sets of sliding grooves 34 are symmetrically arranged on the upper side of the moving plate 30. A sliding shaft 35 is provided in the sliding groove 34. A sliding bracket 33 is slidably installed on the sliding shaft 35. The bottom of the sliding bracket 33 supports the lower side of the piston block. A return spring 36 is provided on the sliding shaft 35. A connecting frame 32 is provided between the sliding brackets 33 on both sides.

[0047] Furthermore, a damping rubber is provided between the center of the moving plate 30 and the piston block.

[0048] Furthermore, such as Figure 10 , Figure 13 As shown, a fixing frame 10 is provided on the upper side of the base 1, and a push-pull motor is provided on the fixing frame 10. The end of the push-pull motor is in contact with the connecting frame 32.

[0049] Specifically, a hole is made in the center of the moving plate 30 to place the piston block to be processed. Damping rubber is evenly distributed in the inner ring of the hole to ensure that the piston block can be locked and fixed before and after processing. Furthermore, in order to ensure stable transportation of the piston block during movement, two sets of sliding grooves 34 are set on the moving plate 30, and a sliding bracket 33 is installed to support the bottom of the piston block. The sliding bracket 33 is controlled by the connecting frame 32 and the push-pull motor. When the piston block is released or recaptured, the sliding bracket 33 moves to open up the hole for placing the piston block.

[0050] Furthermore, such as Figure 1 , Figure 9 , Figure 13As shown, a guide assembly 5 is provided on the top of the molding die 4. The guide assembly 5 includes guide grooves 50 symmetrically arranged on the top of the molding die 4. The inner edge of the guide groove 50 is connected to the upper port of the inner mold cylinder 41. A rotating shaft 51 is provided on the edge of the guide groove 50. The guide groove 50 is rotatably installed between the rotating shaft 51 and the fixing frame 10. A sector gear 52 is provided on the rotating shaft 51. The sector gears 52 between the two rotating shafts 51 mesh with each other. One of the rotating shafts 51 is connected to a drive motor 53.

[0051] Specifically, in order to facilitate the piston block falling into the molding die 4, a guide groove 50 is provided on the top of the outer sleeve 40 and the inner mold cylinder 41. The guide groove 50 guides the piston block. After the piston block is cold extruded and molded, when the piston block leaves the inner mold cylinder 41, the drive motor 53 drives the sector gear 52 and the guide groove 50 to open outward, so as to avoid friction between the guide groove 50 and the edge of the piston block and damage to the outer ring structure of the piston block.

[0052] Furthermore, such as Figure 11 , Figure 12 As shown, the bottom four corners of the movable plate 30 are provided with a first snap-fit ​​groove 300, and a first snap-fit ​​plate 301 is slidably installed in the first snap-fit ​​groove 300. The bottom of the first snap-fit ​​plate 301 is provided with a second snap-fit ​​groove 302, and a second snap-fit ​​plate 303 is slidably installed in the second snap-fit ​​groove 302. The second snap-fit ​​plate 303 is perpendicular to the first snap-fit ​​plate 301. The bottom of the second snap-fit ​​plate 303 is provided with a mating head 304, and the mating head 304 is slidably fitted with the processing guide rail 2.

[0053] Specifically, the moving plate 30 in the moving carrier 3 moves cyclically along the processing guide rail 2. In order to ensure that the moving plate 30 can move reliably in the arc area of ​​the processing guide rail 2, a first snap-fit ​​plate 301 and a second snap-fit ​​plate 303 are provided at the bottom of the moving plate 30. The first snap-fit ​​plate 301 and the second snap-fit ​​plate 303 are vertically arranged. When the moving plate 30 reaches the arc area at both ends of the processing guide rail 2, the mating head 304 will adaptively adjust by engaging the first snap-fit ​​groove 300 and the second snap-fit ​​groove 302, thereby ensuring that the moving plate 30 moves smoothly along the processing guide rail 2.

[0054] The working principle of this invention embodiment is as follows:

[0055] like Figures 1-13As shown, the piston block to be processed is transported to the forming mold 4 station by the moving carrier 3. With the cooperation of the hydraulic press 6 and the cold pressing head 60, the piston block on the moving carrier 3 is pushed into the forming mold 4. The piston block falls into the inner mold cylinder 41. The cold pressing head 60 drives the piston block to move down, and works together with the bottom support block 44 to realize the cold extrusion forming of the piston block. After the piston block completes the cold extrusion forming, the hydraulic press 6 drives the cold pressing head 60 to rise back to the initial height. The formed piston block moves upward under the drive of the supporting cylinder 43 and the bottom support block 44, so that the piston block leaves the inner mold cylinder 41 and returns to the height of the moving carrier 3. The processed piston block is recaptured by the moving carrier 3 and moves along the processing guide rail 2, driving the next piston block to be cold extruded. The outer sleeve 40, assembled together with the inner mold sleeve 41, forms the molding die 4. When the inner mold sleeve 41 wears out, it only needs to be replaced. The inner mold sleeve 41 is installed with the outer sleeve 40 through a mating outer ring 410, ensuring that the piston block can smoothly disengage from the inner mold sleeve 41 after cold pressing. The upper end of the inner mold sleeve 41 has an inner chamfer to facilitate the entry of the piston block to be processed into the inner mold sleeve 41. At the same time, after the piston block leaves the inner mold sleeve 41 after cold pressing, the lower support block 44 can smoothly return to the inner mold sleeve 41, avoiding excessive wear on the edge of the lower support block 44. After the outer sleeve 40 and the inner mold sleeve 41 are assembled into a whole, they are interlocked with the mating flange 46. At this time, the positioning component 42 locks the outer sleeve 40 and the mating flange 46 together. After the outer sleeve 40 is connected to the mating flange 46, the lifting hydraulic cylinder 428 is extended via the hydraulic oil pipe 429. This causes the lifting ring 425 to rise, which in turn causes the lifting piston rod 424 to move upward, pushing the hydraulic oil in the vertical sleeve 423 into the dispersion pipe 422. This causes the end locking part 420 to extend outward, thus forming a locking with the inner side of the outer sleeve 40. A hole is made in the center of the moving plate 30 to place the piston block to be processed. Damping rubber is evenly arranged in the inner ring of the hole to ensure that the piston block can be locked and fixed before and after processing. Furthermore, in order to ensure the stable transport of the piston block during movement, two sets of sliding grooves 34 are set on the moving plate 30, and a sliding bracket 33 is installed to support the bottom of the piston block. The sliding bracket 33 is controlled by the connecting frame 32 and the push-pull motor. When the piston block is released or recaptured, the sliding bracket 33 moves to open the hole for placing the piston block. To facilitate the piston block falling into the molding die 4, guide grooves 50 are provided on the top of the outer sleeve 40 and the inner mold cylinder 41. The guide grooves 50 guide the piston block. After the piston block is cold extruded and molded, when the piston block leaves the inner mold cylinder 41, the drive motor 53 drives the sector gear 52 and the guide grooves 50 to open outward, so as to avoid friction between the guide grooves 50 and the edge of the piston block, which would damage the outer ring structure of the piston block.The moving plate 30 in the moving carrier 3 moves cyclically along the processing guide rail 2. In order to ensure that the moving plate 30 can move reliably in the arc area of ​​the processing guide rail 2, a first snap-fit ​​plate 301 and a second snap-fit ​​plate 303 are provided at the bottom of the moving plate 30. The first snap-fit ​​plate 301 and the second snap-fit ​​plate 303 are arranged vertically between each other. When the moving plate 30 reaches the arc area at both ends of the processing guide rail 2, the mating head 304 will adaptively adjust by engaging the first snap-fit ​​groove 300 and the second snap-fit ​​groove 302, thereby ensuring that the moving plate 30 moves smoothly along the processing guide rail 2.

[0056] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0057] 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 cold extrusion device for processing pistons of automobile shock absorbers, comprising a base (1), a forming mold (4) disposed on the base (1), a moving carrier (3) and a processing guide rail (2) disposed on the upper side of the forming mold (4), the moving carrier (3) carrying the piston block to be processed moving cyclically along the processing guide rail (2), a hydraulic press (6) disposed on the top of the base (1), the hydraulic press (6) being connected to a cold press head (60), characterized in that, The forming mold (4) includes an outer sleeve (40) fixedly installed in the center of the base (1), an inner mold cylinder (41) is fitted inside the outer sleeve (40), a lower support block (44) is fitted inside the inner mold cylinder (41), a support cylinder (43) is fixedly installed on the base (1), the support cylinder (43) is coaxially installed with the outer sleeve (40) and the inner mold cylinder (41), the upper end of the support cylinder (43) is connected to the lower support block (44), after the piston block is released into the inner mold cylinder (41) by the moving carrier (3), the hydraulic press (6) drives the cold press head (60) to push the piston block downward and combine it with the lower support block (44) for cold extrusion forming, after the piston block is cold extruded and formed, it is pushed upward by the support cylinder (43) and the lower support block (44) and recaptured by the moving carrier (3); The mobile carrier (3) includes a moving plate (30), the center of which cooperates with the piston block to be processed. A connecting rope (31) is provided between the moving plates (30) of the multiple mobile carriers (3). The bottom of the moving plate (30) is engaged with the processing guide rail (2). Two sets of sliding grooves (34) are symmetrically arranged on the upper side of the moving plate (30). A sliding shaft (35) is provided in the sliding groove (34). A sliding bracket (33) is slidably installed on the sliding shaft (35). The bottom of the sliding bracket (33) supports the lower side of the piston block. A return spring (36) is provided on the sliding shaft (35). A connecting frame (32) is provided between the sliding brackets (33) on both sides.

2. The cold extrusion device for processing automotive shock absorber pistons according to claim 1, characterized in that, The outer sleeve (40) is arranged in a symmetrical combination. The inner ring of the outer sleeve (40) is provided with a locking groove (400). The outer side of the inner mold cylinder (41) is provided with a mating outer ring (410) that cooperates with the locking groove (400). The upper end of the inner mold cylinder (41) is provided with an inner chamfer.

3. The cold extrusion device for processing automotive shock absorber pistons according to claim 1, characterized in that, A docking flange (46) is fixedly installed on the base (1). A positioning component (42) is installed inside the docking flange (46). The outer sleeve (40) is fixedly connected to the base (1) and the docking flange (46) through the positioning component (42). The positioning component (42) includes an installation sleeve (45) located at the central axis of the docking flange (46). An annular sleeve (421) is fixedly installed on the installation sleeve (45). Dispersion tubes (422) are evenly arranged on the outer ring of the annular sleeve (421). 22) has a snap-fit ​​part (420) at the end, and a vertical sleeve (423) is connected to the bottom of the annular sleeve (421). A lifting piston rod (424) is installed inside the vertical sleeve (423). Multiple sets of lifting hydraulic cylinders (428) are fixedly installed inside the docking flange (46). A lifting ring (425) is connected to the end of the lifting hydraulic cylinder (428). The bottom of the lifting piston rod (424) is connected to the lifting ring (425). The lifting hydraulic cylinders (428) are connected in series and connected by hydraulic oil pipes (429).

4. The cold extrusion device for processing automotive shock absorber pistons according to claim 3, characterized in that, The snap-fit ​​part (420) is provided with a hydraulic groove (4200) inside. The dispersion tube (422) is inserted into the hydraulic groove (4200). The snap-fit ​​part (420) is provided with pressure plates (4201) on the upper and lower sides of the end. The pressure plates (4201) and the snap-fit ​​part (420) are fastened together with ball bearings (4202). The ball bearings (4202) are provided with a support spring (4203). The inner side of the outer sleeve (40) is provided with a groove that cooperates with the snap-fit ​​part (420).

5. A cold extrusion device for processing automotive shock absorber pistons according to claim 1, characterized in that, A fixing frame (10) is provided on the upper side of the base (1), and a push-pull motor is provided on the fixing frame (10). The end of the push-pull motor is in contact with the connecting frame (32).

6. A cold extrusion apparatus for processing automotive shock absorber pistons according to claim 5, characterized in that, The top of the molding die (4) is provided with a guide assembly (5). The guide assembly (5) includes guide grooves (50) symmetrically arranged on the top of the molding die (4). The inner edge of the guide groove (50) is connected to the upper port of the inner mold cylinder (41). The edge of the guide groove (50) is provided with a rotating shaft (51). The guide groove (50) is rotatably installed between the rotating shaft (51) and the fixing frame (10). The rotating shaft (51) is provided with a sector gear (52). The sector gears (52) between the two rotating shafts (51) on both sides mesh with each other. One of the rotating shafts (51) is connected to a drive motor (53).

7. A cold extrusion device for processing automotive shock absorber pistons according to claim 1, characterized in that, The bottom four corners of the movable plate (30) are provided with a snap-fit ​​groove 1 (300), and a snap-fit ​​plate 1 (301) is slidably installed in the snap-fit ​​groove 1 (300). The bottom of the snap-fit ​​plate 1 (301) is provided with a snap-fit ​​groove 2 (302), and a snap-fit ​​plate 2 (303) is slidably installed in the snap-fit ​​groove 2 (302). The snap-fit ​​plate 2 (303) is perpendicular to the snap-fit ​​plate 1 (301). The bottom of the snap-fit ​​plate 2 (303) is provided with a mating head (304), and the mating head (304) is slidably fitted with the processing guide rail (2).

8. A cold extrusion device for processing automotive shock absorber pistons according to claim 1, characterized in that, Damping rubber is provided between the center of the moving plate (30) and the piston block.

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