A progressive die for forming parts of an automotive clutch and a method of press forming

Abstract

The present application relates to the technical field of stamping die, and particularly relates to a progressive die for forming automobile clutch parts and a stamping forming method. The progressive die comprises an upper die assembly and a lower die assembly, and twelve stations are sequentially arranged along the advancing direction of a material belt, and the twelve stations respectively complete the punching of a pre-mounting hole of a damping spring, the punching of a center hole and a peripheral mounting hole, the forming of an outer circle contour, the sanding of the peripheral mounting hole, the punching of a final mounting hole of the damping spring, the pre-forming and final forming of a damping spring guide seat, the chamfering of the final mounting hole, the counter boring of the center hole, and the part edge cutting and separation. The present application aims to solve the technical problems of low production efficiency and poor size consistency in the prior art for the single-station die for processing automobile clutch parts.

Description

Technical Field

[0001] This invention relates to the field of stamping die technology, and in particular to a progressive die and stamping method for forming automotive clutch parts. Background Technology

[0002] In the automotive parts manufacturing industry, clutch parts, as key components of the transmission system, typically have complex structures including center holes, peripheral mounting holes, damping spring mounting holes, and guide seats, and are formed by stamping. Traditional processing methods generally employ single-operation stamping dies, meaning each stamping operation requires a separate set of dies, sequentially completing punching, forming, reaming, chamfering, and trimming operations on different equipment. This process not only requires multiple clamping and manual transfer of the workpiece, making operation difficult and labor-intensive, but also severely restricts production efficiency. More importantly, because the positioning datum between each operation is difficult to completely unify, cumulative errors increase, ultimately resulting in poor dimensional consistency and insufficient precision of the parts. Summary of the Invention

[0003] The purpose of this invention is to solve the technical problems of low production efficiency and poor dimensional consistency in the processing of automotive clutch parts using single-process stamping dies in the prior art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] According to a first aspect of the present invention, a progressive die for molding automotive clutch parts is provided, comprising an upper die assembly and a lower die assembly, and twelve stations arranged sequentially along the material strip travel direction, including:

[0006] The first station is the first punching station, used to punch out the pre-installation holes for the vibration damping springs;

[0007] The second station is the second punching station, used to punch out the center hole and the peripheral mounting holes.

[0008] The third station is the first forming station, used to form the outer circle contour of the part;

[0009] The fourth station is the salad-making station, used to process salads on the peripheral mounting holes;

[0010] The fifth station is the third punching station, used to punch the pre-installation hole of the vibration damping spring to form the final installation hole of the vibration damping spring;

[0011] The sixth station is the fourth punching station, used to punch out the pre-formed structure of the vibration damping spring guide seat;

[0012] The seventh station is a chamfering station, used to chamfer the final mounting holes of the vibration damping spring;

[0013] The eighth station is the second forming station, used to form the pre-formed structure of the vibration damping spring guide seat into the final formed structure of the vibration damping spring guide seat;

[0014] The ninth station is the fifth punching station, used to enlarge the center hole;

[0015] The tenth, eleventh, and twelfth stations are edge-cutting and separation stations used to cut the formed clutch parts off the conveyor belt.

[0016] Optionally, the first station is provided with five first punching heads evenly distributed along the circumference for punching to form the pre-installation holes of the vibration damping spring.

[0017] Optionally, the second station is provided with a central punching head and a ring of peripheral punching heads arranged around the central punching head. The central punching head is used to punch and form the central hole, and the peripheral punching heads are used to punch and form the peripheral mounting holes.

[0018] Optionally, the third station is provided with an outer circle forming pressure head and a corresponding outer circle forming groove, wherein the outer circle forming pressure head and the outer circle forming groove cooperate to form the outer circle contour.

[0019] Optionally, the fifth station is equipped with five second punching heads for punching the pre-installation holes of the damping spring to form the final installation holes of the damping spring.

[0020] Optionally, the sixth station is equipped with five third punching heads for punching to form the preformed structure of the vibration damping spring guide seat.

[0021] Optionally, the eighth station is provided with five guide seat forming heads and five corresponding guide seat forming seats. Each guide seat forming seat is provided with a guide seat forming groove. The guide seat forming head cooperates with the guide seat forming groove to form the final forming structure of the vibration damping spring guide seat.

[0022] Optionally, the progressive die is used to process strips with a thickness of 5 mm.

[0023] Optionally, the continuous die also includes an automatic feeding mechanism for controlling the step feeding of the material belt.

[0024] According to a second aspect of the present invention, a method for forming an automotive clutch part using the above-described progressive die is provided, comprising the following steps:

[0025] The continuous strip is fed into the starting position of the continuous die;

[0026] The upper and lower mold components are closed, and the stamping action of twelve stations is performed in sequence. After each mold closure, the mold is opened, and the material strip is moved forward by one station distance.

[0027] The stamping actions at the twelve stations are as follows:

[0028] First station: Punch out five pre-installation holes for vibration damping springs on the material strip;

[0029] Second station: Punch out the center hole and a ring of peripheral mounting holes;

[0030] Third station: Forming the outer contour of the clutch part;

[0031] Fourth station: Perform salad processing on the peripheral mounting holes;

[0032] Fifth station: The pre-installation holes of the vibration damping spring are punched to form the final installation holes of the vibration damping spring;

[0033] Sixth station: Punch out the pre-formed structure of the vibration damping spring guide seat;

[0034] Seventh station: Chamfer the final mounting hole of the vibration damping spring;

[0035] Eighth station: The pre-formed structure of the vibration damping spring guide seat is formed into the final formed structure of the vibration damping spring guide seat;

[0036] Ninth station: Enlarge the center hole;

[0037] Stations 10, 11, and 12: The formed clutch parts are separated from the conveyor belt by cutting the edges.

[0038] The advantages of this invention are as follows: Compared with existing single-process stamping dies, this continuous die completes all 12 processes (including punching, forming, chamfering, and trimming) in one feeding stroke, avoiding multiple clamping, repeated positioning, and manual transfer; since the strip is continuously formed under the same datum of the die throughout the process, the precision is higher. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is a schematic diagram of the upper mold assembly described in this invention;

[0041] Figure 2 This is a schematic diagram of the lower mold assembly described in this invention;

[0042] Figure 3 This is a schematic diagram of the material strip structure described in this invention;

[0043] Figure 4 This is a schematic diagram of the structure of the molded clutch part according to the present invention.

[0044] In the diagram: 100, upper mold assembly; 200, lower mold assembly; 1, first punching station; 2, second punching station; 3, first forming station; 4, salad bar forming station; 5, third punching station; 6, fourth punching station; 7, chamfering station; 8, second forming station; 9, fifth punching station; 10, edge trimming and separation station. Detailed Implementation

[0045] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] Example 1

[0047] like Figures 1-4 As shown, a progressive die for molding automotive clutch parts includes an upper die assembly 100 and a lower die assembly 200, with twelve stations arranged sequentially along the material strip's travel direction. This progressive die is suitable for processing material strips with a thickness of 5 mm and is equipped with an automatic feeding mechanism to control the step-by-step feeding of the material strip.

[0048] The first station is the first punching station 1. The upper die assembly 100 has five punching heads evenly distributed along the circumference, and the lower die assembly 200 has matching slots at corresponding positions. The two work together to punch out pre-installation holes for the vibration damping springs on the strip. This layout ensures that the five pre-installation holes are distributed at equal angles along the circumference, providing precise initial positioning for subsequent vibration damping spring assembly.

[0049] The second station is the second punching station 2. The upper die assembly 100 has a central punching head and a ring of peripheral punching heads arranged around the central punching head. The lower die assembly 200 has a corresponding central slot and a ring of peripheral slots. The central punching head cooperates with the central slot to punch out the central hole, and the peripheral punching heads cooperate with the peripheral slots to punch out the peripheral mounting holes, realizing the one-time synchronous forming of the core positioning hole and the peripheral connecting hole of the clutch part.

[0050] The third station is the first forming station 3. The upper mold assembly 100 is equipped with an outer circle forming pressure head, and the lower mold assembly 200 is equipped with a matching outer circle forming groove. When the upper mold presses down, the outer circle forming pressure head is embedded into the outer circle forming groove to plastically deform the material strip, thereby forming the outer circle contour of the part and ensuring the overall dimensional accuracy.

[0051] The fourth station is the salad bar station 4. The upper mold assembly 100 is equipped with a salad bar pressure head, which acts on the already formed peripheral mounting holes to perform salad bar processing, so that the hole opening forms a countersunk head structure that facilitates screw assembly, thereby improving the efficiency and reliability of subsequent assembly.

[0052] The fifth station is the third punching station 5. The upper die assembly 100 is equipped with five second punching heads, and the lower die assembly 200 is equipped with corresponding slots. The pre-installation holes of the damping spring formed in the first station are further punched to form the final installation holes of the damping spring with dimensions and shapes that meet the final assembly requirements.

[0053] The sixth station is the fourth punching station 6. The upper die assembly 100 is equipped with five third punching heads, and the lower die assembly 200 is equipped with matching slots, which are used to punch the vibration damping spring guide seat preform structure on the material strip, providing basic geometric features for subsequent guide seat forming.

[0054] The seventh station is the chamfering station 7. The upper mold assembly 100 is equipped with a chamfering pressure head or chamfering cutter to chamfer the edge of the final mounting hole of the vibration damping spring, remove burrs and form a guide slope to facilitate the smooth installation of the vibration damping spring, while improving the safety of the parts.

[0055] The eighth station is the second forming station 8. The upper mold assembly 100 is equipped with five guide seat forming pressure heads, and the lower mold assembly 200 is equipped with five guide seat forming seats. Each guide seat forming seat has a guide seat forming groove. The guide seat forming pressure heads and guide seat forming grooves work together to press the pre-formed structure of the vibration damping spring guide seat into a final formed structure of the vibration damping spring guide seat with a complete functional contour, ensuring the fitting accuracy and stability between the guide seat and the spring.

[0056] The ninth station is the fifth punching station 9. The upper die assembly 100 is provided with a hole-expanding pressure head, and the lower die assembly 200 is provided with a corresponding hole-expanding slot, which is used to expand the center hole formed in the second station to meet the assembly clearance requirements of the shaft-type parts in the clutch assembly.

[0057] The tenth, eleventh and twelfth stations together constitute the cutting and separating station 10. The upper mold assembly 100 is equipped with a cutting tool set, and the lower mold assembly 200 is equipped with a corresponding cutting edge structure. Through three consecutive cutting actions, the clutch parts that have completed all forming processes are completely cut off from the material strip, realizing the separation of the finished product from the material strip.

[0058] This progressive die, through the coordinated operation of twelve stations, completes multiple processes such as punching, forming, stripping, chamfering, and trimming within a single feeding stroke, avoiding multiple clamping operations and manual transfer. Since all processes are completed within the same die system, the relative positions of each feature hole and the formed structure are guaranteed by the die itself, significantly reducing cumulative errors caused by repeated positioning. It is particularly suitable for the high-precision stamping requirements of 5mm thick plates. Combined with an automatic feeding mechanism, it enables automated production.

[0059] Example 2

[0060] A method for forming automotive clutch parts using progressive die stamping includes the following steps:

[0061] Step 1: Feed a 5mm thick continuous strip into the starting position of the progressive die, which is equipped with an automatic feeding mechanism to control the step feeding of the strip;

[0062] Step 2: Close the upper mold assembly 100 and the lower mold assembly 200, and perform the stamping actions of twelve stations in sequence. After each mold closure completes the corresponding process, the mold is opened, and the material belt is driven forward by the automatic feeding mechanism by one station distance.

[0063] The stamping actions at the twelve stations are performed sequentially as follows:

[0064] First station: Using the five first punching heads evenly distributed along the circumference in the upper mold assembly 100 to cooperate with the corresponding slots in the lower mold assembly 200, five pre-installation holes for damping springs are punched out on the strip, providing accurate initial positioning for subsequent damping spring assembly;

[0065] Second station: Through the central punching head in the upper mold assembly 100 and the ring of peripheral punching heads arranged around it, they work together with the central slot and peripheral slot of the lower mold assembly 200 to punch out the central hole and the ring of peripheral mounting holes at the same time, so as to achieve one-time forming of the core positioning hole and the peripheral connecting hole.

[0066] The third station: the outer circle forming pressure head of the upper mold assembly 100 cooperates with the outer circle forming groove of the lower mold assembly 200 to plastically deform the strip and form the outer circle contour of the clutch part, ensuring the overall dimensional accuracy.

[0067] Fourth station: The ring of the upper mold assembly 100 is applied to the already formed peripheral mounting holes to perform a countersunk head process, which facilitates screw assembly and improves the efficiency and reliability of subsequent assembly.

[0068] Fifth station: The five second punching heads of the upper mold assembly 100 cooperate with the corresponding slots of the lower mold assembly 200 to further punch the pre-installation holes of the vibration damping springs, forming the final installation holes of the vibration damping springs that meet the final assembly requirements.

[0069] Sixth station: The five third punching heads of the upper die assembly 100 work together with the matching slots of the lower die assembly 200 to punch a pre-formed structure of the vibration damping spring guide on the strip, providing basic geometric features for the subsequent guide forming;

[0070] Seventh station: The chamfering head or chamfering cutter of the upper mold assembly 100 chamfers the edge of the final mounting hole of the vibration damping spring, removes burrs and forms a guide slope, which facilitates the smooth installation of the vibration damping spring and improves the safety of the parts.

[0071] Eighth station: The five guide forming pressure heads of the upper mold assembly 100 cooperate with the guide forming grooves on the five guide forming seats of the lower mold assembly 200 to press the pre-formed structure of the damping spring guide seat into a final-formed structure of the damping spring guide seat with a complete functional profile, ensuring the fitting accuracy and stability between the guide seat and the spring.

[0072] Ninth station: The reaming head of the upper mold assembly 100 mates with the corresponding reaming slot of the lower mold assembly 200 to ream the center hole to meet the assembly clearance requirements of the shaft-type parts of the clutch assembly.

[0073] Stations 10, 11, and 12: The cutting tool group of the upper mold assembly 100 works in coordination with the corresponding cutting edge structure of the lower mold assembly 200 to cut the clutch parts that have completed all forming processes completely off the material strip through three consecutive cutting actions, thereby achieving the separation of the finished product from the material strip.

[0074] This method completes multiple processes, including punching, forming, stripping, chamfering, and trimming, in a single continuous feeding process using twelve stations, avoiding multiple clamping and manual transfer. Since all processes are completed within the same mold system, the relative positions of each feature hole and the formed structure are guaranteed by the mold itself, significantly reducing cumulative errors caused by repeated positioning. It is particularly suitable for the high-precision stamping requirements of 5mm thick plates. Combined with an automatic feeding mechanism, it achieves automated production.

[0075] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A progressive die for molding automotive clutch parts, comprising an upper die assembly and a lower die assembly, characterized in that, There are twelve workstations arranged sequentially along the direction of material conveyor belt travel, including: The first station is the first punching station, used to punch out the pre-installation holes for the vibration damping springs; The second station is the second punching station, used to punch out the center hole and the peripheral mounting holes. The third station is the first forming station, used to form the outer circle contour of the part; The fourth station is the salad-making station, used to process salads on the peripheral mounting holes; The fifth station is the third punching station, used to punch the pre-installation hole of the vibration damping spring to form the final installation hole of the vibration damping spring; The sixth station is the fourth punching station, used to punch out the pre-formed structure of the vibration damping spring guide seat; The seventh station is a chamfering station, used to chamfer the final mounting holes of the vibration damping spring; The eighth station is the second forming station, used to form the pre-formed structure of the vibration damping spring guide seat into the final formed structure of the vibration damping spring guide seat; The ninth station is the fifth punching station, used to enlarge the center hole; The tenth, eleventh, and twelfth stations are edge-cutting and separation stations used to cut the formed clutch parts off the conveyor belt.

2. The continuous mold according to claim 1, characterized in that, The first station is equipped with five punching heads evenly distributed along the circumference for punching to form the pre-installation holes of the vibration damping spring.

3. The continuous mold according to claim 1, characterized in that, The second station is provided with a central punching head and a ring of peripheral punching heads arranged around the central punching head. The central punching head is used to punch and form the central hole, and the peripheral punching heads are used to punch and form the peripheral mounting holes.

4. The continuous mold according to claim 1, characterized in that, The third station is equipped with an outer circle forming pressure head and a corresponding outer circle forming groove. The outer circle forming pressure head and the outer circle forming groove cooperate to form the outer circle contour.

5. The continuous mold according to claim 1, characterized in that, The fifth station is equipped with five second punching heads, which are used to punch the pre-installation holes of the vibration damping spring to form the final installation holes of the vibration damping spring.

6. The continuous modulus according to claim 1, characterized in that, The sixth station is equipped with five third punching heads for punching to form the pre-formed structure of the vibration damping spring guide seat.

7. The continuous mold according to claim 1, characterized in that, The eighth station is equipped with five guide seat forming pressure heads and five corresponding guide seat forming seats. Each guide seat forming seat is provided with a guide seat forming groove. The guide seat forming pressure head cooperates with the guide seat forming groove to form the final forming structure of the vibration damping spring guide seat.

8. The continuous mold according to claim 1, characterized in that, The progressive die is used to process strips with a thickness of 5 mm.

9. The continuous mold according to claim 1, characterized in that, The continuous die also includes an automatic feeding mechanism, which is used to control the step feeding of the material belt.

10. A method for stamping automotive clutch parts using a progressive die according to any one of claims 1 to 9, characterized in that, Includes the following steps: The continuous strip is fed into the starting position of the continuous die; The upper and lower mold components are closed, and the stamping action of twelve stations is performed in sequence. After each mold closure, the mold is opened, and the material strip is moved forward by one station distance. The stamping actions at the twelve stations are as follows: First station: Punch out five pre-installation holes for vibration damping springs on the material strip; Second station: Punch out the center hole and a ring of peripheral mounting holes; Third station: Forming the outer contour of the clutch part; Fourth station: Perform salad processing on the peripheral mounting holes; Fifth station: The pre-installation holes of the vibration damping spring are punched to form the final installation holes of the vibration damping spring; Sixth station: Punch out the pre-formed structure of the vibration damping spring guide seat; Seventh station: Chamfer the final mounting hole of the vibration damping spring; Eighth station: The pre-formed structure of the vibration damping spring guide seat is formed into the final formed structure of the vibration damping spring guide seat; Ninth station: Enlarge the center hole; Stations 10, 11, and 12: The formed clutch parts are separated from the conveyor belt by cutting the edges.

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