Punch forming die for clutch spring diaphragm

Abstract

The utility model relates to a punch forming die for a clutch spring diaphragm, which comprises an upper female die and a lower male die which correspond to each other, a punch handle arranged at the upper female die, and a core shaft and a top shaft which are arranged at the lower male die, and the upper female die and the lower male die are respectively provided with a shaping cavity and a shaping core which are used for punch forming. The forming cavity and the forming core are respectively provided with ventilation grooves distributed in a circumferential mode and annular grooves communicated with the inner ends of the ventilation grooves, and the forming cavity / the forming core is divided into independent stamping faces through the ventilation grooves and the annular grooves. Air is effectively prevented from being retained at the inner end of the ventilation groove through the circular ring groove, uniform distribution of pressure in the stamping process is guaranteed through the stamping face, deformation and defects are reduced, and therefore the stamping forming quality and efficiency are improved.

Description

Technical Field

[0001] This utility model relates to the technical field of clutches, and in particular to a stamping die for a clutch spring diaphragm. Background Technology

[0002] The diaphragm spring is a key component of the clutch. Its main function is to provide a uniform pressure distribution during clutch engagement and disengagement, thereby ensuring smooth and reliable power transmission. However, in traditional stamping dies, gas trapped between the die and the sheet metal during stamping can lead to uneven pressure distribution. This uneven pressure distribution can cause localized deformation or surface defects in the diaphragm spring, ultimately affecting its performance within the clutch system. Summary of the Invention

[0003] To overcome the shortcomings of the prior art, the technical solution adopted by this utility model is: a stamping die for a clutch spring diaphragm, including a corresponding upper die and a lower die, a punch shank provided at the upper die, and a mandrel and a top shaft provided at the lower die. The upper die and the lower die are respectively provided with a shaping cavity and a shaping core for stamping. The shaping cavity and the shaping core are respectively provided with circumferentially distributed ventilation grooves and an annular groove connected to the inner end of the ventilation groove. The shaping cavity and the shaping core are divided into independent stamping surfaces by the ventilation groove and the annular groove.

[0004] Using the above technical solution, the upper die and mandrel are connected to hydraulic / pneumatic cylinders via the punch shank and top shaft, respectively, to place the sheet metal between the upper die and lower punch. The forming cavity and forming core allow the sheet metal to be stamped into the corresponding structure. During the stamping process, the air between the sheet metal and the upper / lower die is allowed to pass through the venting groove and the annular groove. The annular groove effectively prevents the air from stagnating in the inner end of the venting groove. The stamping surface ensures the uniform distribution of pressure during the stamping process, reducing deformation and defects, thereby improving the quality and efficiency of stamping.

[0005] The present invention is further configured such that the mandrel is coaxially connected to a top shaft, and the lower punch is provided with a countersunk hole for sliding connection of the mandrel, and the top shaft extends outward through the countersunk hole.

[0006] Furthermore, the upper die has an inner concave portion, an upper inclined portion, and an upper extension portion for forming the outline of the spring diaphragm from the inside out. The mandrel has an outer inclined surface corresponding to the inner concave portion. The rounded corner surface of the spring diaphragm is formed by stamping through the inner concave portion and the outer inclined surface. The lower punch has a lower inclined portion and a lower extension portion corresponding to the upper inclined portion and the upper extension portion.

[0007] By adopting the above technical solution, the contour of the spring diaphragm can be precisely formed through the connected concave portion, the upward inclined portion, and the upward extension portion, ensuring product consistency.

[0008] The present invention is further configured such that the upper inclined part / lower inclined part and the upper extension part / lower extension part are each provided with a set of circumferentially distributed air vents, and the inner side of each set of air vents is connected by a circular groove.

[0009] Furthermore, the upper inclined portion / lower inclined portion is provided with twelve sets of circumferentially distributed ventilation grooves, and the upper extension portion / lower extension portion is provided with twenty-one sets of circumferentially distributed ventilation grooves.

[0010] Using the above technical solution, the upper die and lower die are cylindrical in structure. The ventilation grooves are segmented and connected by annular grooves to avoid the ventilation grooves on the inner side of the circle being too concentrated and the ventilation grooves on the outer side being too dispersed. This ensures that the width of each stamping surface is similar, thereby guaranteeing the quality of the inner and outer surfaces of the spring diaphragm.

[0011] The present invention is further configured such that the lower punch is provided with through holes distributed in a circular pattern at the annular groove.

[0012] Using the above technical solution, after the spring diaphragm is stamped, it forms a conical structure with the opening facing the lower punch. This allows more gas to be concentrated between the spring diaphragm and the lower punch during the stamping process, and the gas can be discharged in time through the through hole, further optimizing the exhaust path.

[0013] The embodiments of this utility model will be further described below with reference to the accompanying drawings. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a front view of the upper concave die of this utility model;

[0016] Figure 3 This is a front view of the lower punch of this utility model;

[0017] Figure 4 For the present utility model Figure 1 A magnified view of the central A-direction view;

[0018] Figure 5 For the present utility model Figure 1 A magnified view of the central B-direction view;

[0019] Figure 6 This is a cross-sectional view of the spring diaphragm of this utility model;

[0020] Wherein: 1-Upper die, 2-Lower punch, 3-Punch shank, 4-Mandrel, 5-Top spindle, 6-Shaping cavity, 7-Shaping core, 8-Ventilation groove, 9-Circular groove, 10-Punching surface, 11-Counterhead hole, 12-Inner recess, 13-Upper inclined portion, 14-Upper extension, 15-Outer inclined surface, 16-Rounded corner surface, 17-Lower inclined portion, 18-Lower extension, 19-Through hole; Detailed Implementation

[0021] like Figure 1-3 As shown, this utility model provides a stamping die for a clutch spring diaphragm, including a corresponding upper die 1 and lower die 2, a punch shank 3 provided at the upper die 1, and a mandrel 4 and a top shaft 5 provided at the lower die 2. The upper die 1 and the lower die 2 are respectively provided with a shaping cavity 6 and a shaping core 7 for stamping. The shaping cavity 6 and the shaping core 7 are respectively provided with circumferentially distributed ventilation grooves 8 and an annular groove 9 connected to the inner end of the ventilation groove 8. The shaping cavity 6 and the shaping core 7 are divided into independent stamping surfaces 10 by the ventilation grooves 8 and the annular groove 9.

[0022] Combination Figure 4-6 As shown, in this embodiment, the mandrel 4 is coaxially connected to the top shaft 5. The lower punch 2 is provided with a countersunk hole 11 for sliding connection of the mandrel 4. The top shaft 5 extends outward through the countersunk hole 11. The upper die 1 is provided from the inside out with an inner concave portion 12, an upper inclined portion 13, and an upper extension portion 14 for forming the outline of the spring diaphragm. The mandrel 4 is provided with an outer inclined surface 15 corresponding to the inner concave portion 12. The rounded corner surface 16 of the spring diaphragm is formed by stamping through the inner concave portion 12 and the outer inclined surface 15. The lower punch 2 is provided with a lower inclined portion 17 and a lower extension portion 18 corresponding to the upper inclined portion 13 and the upper extension portion 14. Through the connected inner concave portion 12, upper inclined portion 13, and upper extension portion 14, the outline of the spring diaphragm can be accurately formed, ensuring the consistency of the product.

[0023] like Figure 2 , 3 As shown, in this embodiment, the upper inclined portion 13 and the lower inclined portion 17 are provided with twelve sets of circumferentially distributed ventilation grooves 8, and the upper extension portion 14 and the lower extension portion 18 are provided with twenty-one sets of circumferentially distributed ventilation grooves 8. The inner side of each set of ventilation grooves 8 is connected by a circular groove 9. The upper die 1 and the lower die 2 are cylindrical in structure. The ventilation grooves 8 are segmented and connected by a circular groove 9 to avoid the inner ventilation grooves 8 being too concentrated and the outer ventilation grooves 8 being too dispersed, so that the width of each stamping surface 10 is similar, in order to ensure the quality of the inner and outer surfaces of the spring diaphragm.

[0024] like Figure 3As shown, in this embodiment, the lower punch 2 is provided with circumferentially distributed through holes 19 at the annular groove 9. After the spring diaphragm is stamped, it forms a conical structure with the opening facing the lower punch 2, so that more gas is concentrated between the spring diaphragm and the lower punch 2 during the stamping process. The gas can be discharged in time through the through holes 19, further optimizing the exhaust path.

[0025] In this invention, the upper die 1 and the mandrel 4 are connected to hydraulic cylinders via the punch shank 3 and the top shaft 5, respectively. The cut plate is placed between the upper die 1 and the lower punch 2. The plate is stamped into the corresponding structure through the shaping cavity 6 and the shaping core 7, and then formed through subsequent heat treatment, surface treatment and other processes. During the stamping process, the air between the plate and the upper die 1 and between the plate and the lower punch 2 is allowed to pass through the venting groove 8 and the annular groove 9. The annular groove 9 effectively prevents the air from stagnating in the inner end of the venting groove 8. The stamping surface 10 ensures uniform pressure distribution, reducing the occurrence of deformation and defects.

[0026] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A press forming die for a clutch spring diaphragm, characterized by, The device comprises a corresponding upper concave die (1) and lower convex die (2), punch handle (3) arranged at the upper concave die (1), and mandrel (4) and ejector pin (5) arranged at the lower convex die (2), the upper concave die (1) and the lower convex die (2) are respectively provided with a shaping cavity (6) and a shaping core (7) for stamping forming, the shaping cavity (6) and the shaping core (7) are respectively provided with a plurality of circumferentially distributed air grooves (8), and a circular groove (9) connected with the inner end of the air groove (8), the shaping cavity (6) and the shaping core (7) are divided into independent stamping surfaces (10) by the air grooves (8) and the circular groove (9).

2. A press forming die for a clutch spring diaphragm according to claim 1, characterized in that: The mandrel (4) is coaxially connected with the ejector pin (5), the lower convex die (2) is provided with a countersunk hole (11) for slidingly connecting the mandrel (4), and the ejector pin (5) extends outward through the countersunk hole (11).

3. A press forming die for a clutch spring diaphragm according to claim 2, wherein: The upper concave die (1) is provided with an inner recess (12), an upper inclined portion (13) and an upper extension portion (14) from inside to outside for forming the profile of the spring diaphragm, the mandrel (4) is provided with an outer inclined surface (15) corresponding to the inner recess (12), a round corner surface of the spring diaphragm is formed by stamping the inner recess (12) and the outer inclined surface (15), and the lower convex die (2) is provided with a lower inclined portion (17) and a lower extension portion (18) corresponding to the upper inclined portion (13) and the upper extension portion (14).

4. A press forming die for a clutch spring diaphragm according to claim 3 wherein: The upper inclined portion (13) / lower inclined portion (17) and the upper extension portion (14) / lower extension portion (18) are respectively provided with a plurality of circumferentially distributed air grooves (8), and the inner side of each group of air grooves (8) is communicated by a circular groove (9).

5. A press forming die for a clutch spring diaphragm according to claim 4 wherein: The upper inclined portion (13) / lower inclined portion (17) is provided with twelve groups of circumferentially distributed air grooves (8), and the upper extension portion (14) / lower extension portion (18) is provided with twenty-one groups of circumferentially distributed air grooves (8).

6. A press forming die for a clutch spring diaphragm according to claim 5 wherein: The lower convex die (2) is provided with a plurality of circumferentially distributed through holes (19) at the circular groove (9).

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