A die for double-sided extrusion of the arc of the window of a diaphragm spring

Abstract

The present invention discloses a die for double-sided extrusion of window arcs of a diaphragm spring, which includes an upper template, a lower template, an upper die core, a lower die core, a rubber block, an upper stripping plate, a lower stripping plate, a guide pillar and a guide sleeve; the upper die core and the lower die core are arranged opposite to each other, and their structures are basically the same, both are circular rings, and all arc punch shapes are provided thereon; a rubber block is provided between the upper die core and the upper stripping plate; the upper stripping plate is fixed on the upper die core, and the upper die core is fixedly connected to the upper template; the installation methods of the lower stripping plate, the lower die core and the lower template are the same as those of the upper stripping plate, the upper die core and the upper template; the upper template and the lower template are connected by a guide sleeve and a guide pillar. The die of the present invention adopts the stable characteristics of a simple punching die. Compared with the existing single-window arc extrusion die, the working efficiency is increased several times, and the window arcs can be ensured to be uniform, the product quality consistency is good, the labor intensity of workers is reduced, and the production cost is reduced.

Description

Technical Field

[0001] The present invention relates to a die for processing diaphragm springs, specifically a die for double-sided extrusion of window arcs of diaphragm springs. Background Art

[0002] The clutch is an important component of the automotive transmission system. The diaphragm spring is an important pressing element in the clutch. A number of evenly distributed long radial grooves are provided on the circumferential surface of its inner hole. Larger oval or rectangular window holes are made at the roots of the grooves through which support rivets can pass. This part is called the separating finger; the part from the bottom of the window hole to the outer circumference of the spring is shaped like a bottomless wide-edge dish, and its cross-section is a truncated cone, which is called the disc spring part.

[0003] For the existing diaphragm springs, when extruding the window arcs, multiple processes are required to complete the processing of extruding the window arcs on both sides. It is necessary to extrude the large arc first and then the small arc. Only one side of the window arc can be extruded in one process. There are many processes and the processing efficiency is low. It not only wastes time and energy, but also cannot guarantee the accuracy of the parts, and it is easy to cause disadvantages such as uneven and unqualified window arcs. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide an improved die for extruding window arcs of diaphragm springs. This die combines multiple processes of extruding window arcs into one process to extrude all the window arcs.

[0005] The technical solution for achieving the purpose of the present invention is as follows:

[0006] A die for double-sided extrusion of window arcs of diaphragm springs includes an upper template and a lower template. Different from the prior art, it further includes an upper die core, a lower die core, a rubber block, an upper stripping plate, a lower stripping plate, guide columns and guide sleeves;

[0007] The upper die core and the lower die core are arranged opposite to each other, and their structures are basically the same, both being circular rings;

[0008] All arc punch shapes are provided on the upper die core for extruding the small arc surfaces of the windows;

[0009] All arc punch shapes are provided on the lower die core for extruding the large arc surfaces of the windows;

[0010] The arc punch shapes of the upper die core and the lower die core are evenly distributed in the circumferential direction, and the arc punch shapes of the upper die core and the lower die core are arranged in pairs corresponding to each other;

[0011] A rubber block is provided between the upper die core and the upper stripping plate;

[0012] The upper stripping plate is fitted and assembled with the upper die core, the upper stripping plate is fixed on the upper die core, and the upper die core is fixedly connected to the upper template;

[0013] The installation methods of the lower stripper plate, the lower die core and the lower template are the same as those of the upper stripper plate, the upper die core and the upper template. Specifically, the lower stripper plate is fixed on the lower die core, and the lower die core is fixedly connected to the lower template;

[0014] A rubber block is also arranged between the lower die core and the lower stripper plate. During stripping, the rubber block prevents the parts from jamming the die, facilitating material taking;

[0015] The upper template and the lower template are connected by a guide sleeve and a guide post. The guide sleeve is installed on the upper template, and the guide post is installed on the lower template corresponding to the guide sleeve.

[0016] The large arc surface of the diaphragm spring is the window burr surface. Due to the existence of the tearing belt, the window width N is 0.5 - 1 mm larger. Therefore, the width of the arc press head of the lower die core is taken as L = N + (0.5 - 1), where N represents the window width. The large arc radian R is taken as R = 2 ± 0.25, and a 3-degree slope is set at the contact between the arc and the plane; while the small arc surface is the window corner collapse surface, and its window width N is the normal size. The width l of the arc press head of the upper die core can be directly taken as the window width N. The small arc radian r is taken as r = 1.25 ± 0.25, but a 2-degree slope is set at the contact between the arc and the plane to ensure that the arc is full and has a smooth transition, eliminating stress.

[0017] The shape of the arc press head of the lower die core is determined according to the window size based on the size of the tearing belt. In addition to the arc transition, the arc press head is provided with a protrusion of a certain height M, M = 2 - 3 mm. The position of the protrusion can be used for window positioning, fixing the diaphragm spring at the protruding part of the arc press head, playing a positioning role, so that the diaphragm spring is not in a loose state during extrusion.

[0018] In the die for double-sided extrusion of the window arc of the diaphragm spring of the present invention, the shapes of the arc press heads of the upper die core and the lower die core are arranged in pairs corresponding to each other. The large window arc and the small window arc can be extruded simultaneously in one time on both sides, reducing the multiple extrusion of the arc, eliminating the cumulative error, improving the accuracy of the window arc, increasing the product qualification rate, and greatly improving the life and performance of the diaphragm spring.

[0019] The die of the present invention adopts the stable characteristics of a simple punching die. Compared with the existing single-window arc extrusion die, the working efficiency is increased several times, and it can ensure that the window arc is uniform, the product quality consistency is good, the labor intensity of workers is reduced, and the production cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic cross-sectional structure diagram of the die in the embodiment

[0021] Figure 2 is Figure 1 an enlarged schematic diagram of the shape of the arc press head provided on the lower die core in

[0022] Figure 3 Yes Figure 1 Schematic enlarged view of the arc-shaped press head provided on the upper die core;

[0023] Figure 4 Schematic diagrams of the large and small arcs of the diaphragm spring window;

[0024] Figure 5 Schematic three-dimensional structure diagram of the upper die core in the die of the embodiment;

[0025] Figure 6 Schematic three-dimensional structure diagram of the lower die core in the die of the embodiment.

[0026] In the figure: upper template 1, upper die core 2, arc-shaped press head shape 2-1, fixing screw 3, rubber block 4, stripper screw 5, upper stripper plate 6, lower stripper plate 7, lower die core 8, lower template 9, guide pillar 10, guide sleeve 11. Specific implementation manners

[0027] The following further describes the content of the present invention in conjunction with the accompanying drawings and embodiments, but does not limit the present invention. Embodiment

[0028] Refer to Figures 1-6 , a die for double-sided extrusion of the arc of the diaphragm spring window, including an upper template 1, an upper die core 2, a press head shape 2-1, a fixing screw 3, rubber 4, a stripper screw 5, an upper stripper plate 6, a lower stripper plate 7, a lower die core 8, a lower template 9, a guide pillar 10, a guide sleeve 11;

[0029] The upper die core 2 and the lower die core 8 are arranged opposite to each other, and their structures are basically the same, both being circular rings, as Figures 5-6 shown;

[0030] The upper die core 2 is provided with all arc-shaped press head shapes 2-1 for extruding the small arc surface of the window;

[0031] The lower die core 8 is provided with all arc-shaped press head shapes 2-1 for extruding the large arc surface of the window;

[0032] The arc-shaped press head shapes 2-1 of the upper die core 2 and the lower die core 8 are evenly distributed in the circumferential direction, and the arc-shaped press head shapes 2-1 of the upper die core 2 and the lower die core 8 are arranged in pairs corresponding to each other; the arc-shaped press head shape 2-1 is not a separate individual, but a whole. When double-sided extruding the arc of the window, it is processed at one time, which can improve the accuracy of the arc press head;

[0033] A rubber block 4 is provided between the upper die core 2 and the upper stripper plate 6;

[0034] The upper stripper plate 6 is matched and installed with the upper die core 2. The upper stripper plate 6 is fixed on the upper die core 2 through a stripper screw 5, and the upper die core 2 is fixed on the upper template 1 through a fixing screw 3;

[0035] The installation methods of the lower stripping plate 6, the lower die core 8 and the lower template 9 are the same as those of the upper stripping plate 6, the upper die core 2 and the upper template 1. Specifically, the lower stripping plate 6 is fixed on the lower die core 8 by stripping screws 5, and the lower die core 8 is fixed on the lower template 9 by fixing screws 3;

[0036] A rubber block 4 is also provided between the lower die core 8 and the lower stripping plate 6. During stripping, the rubber block 4 prevents the parts from jamming the die, facilitating material taking;

[0037] The upper template 1 and the lower template 9 are connected by a guide bushing 11 and a guide pillar 10. The guide bushing 11 is installed on the upper template 1, and the guide pillar 10 is installed on the lower template 9 corresponding to the guide bushing 11.

[0038] Refer to Figures 2-6 , the large arc surface of the diaphragm spring is the window burr surface. Due to the existence of the tearing band, the window width N is 0.5 - 1 mm larger. Therefore, the width of the arc press head of the lower die core is taken as L = N + (0.5 - 1), where N represents the window width. The large arc radian R is taken as R = 2 ± 0.25, and a 3-degree slope is set at the contact between the arc and the plane; while the small arc surface is the window corner collapse surface, and its window width N is the normal size. The width l of the arc press head of the upper die core can be directly taken as the window width N. The small arc radian r is taken as r = 1.25 ± 0.25, but a 2-degree slope is set at the contact between the arc and the plane to ensure that the arc is full and has a smooth transition, eliminating stress.

[0039] The shape of the arc press head of the lower die core 8 is determined according to the window size based on the size of the tearing band. In addition to the arc transition, the arc press head is provided with a protrusion of a certain height M, M = 2 - 3 mm. The protrusion position can be used for window positioning, fixing the diaphragm spring at the protrusion part of the arc press head, playing a positioning role, so that the diaphragm spring is not in a loose state during extrusion.

[0040] Refer to Figures 5-6 , for the die of double-sided extrusion of the window arc of the diaphragm spring in this embodiment, 24 arc press head shapes 2-1 are respectively provided on the upper die core 1 and the lower die core 8. The width of the arc press head of the lower die core 8 is taken as L = 16 (N = 15), the large arc radian R = 2.25, and a 3-degree slope is set at the contact between the arc and the plane. The width I of the arc press head of the upper die core 2 is 15, the small arc radian r = 1.5, and a 2-degree slope is set at the contact between the arc and the plane to ensure that the arc is full and has a smooth transition, eliminating stress.

Claims

1. A die for double-sided extrusion of the arc of a diaphragm spring window, comprising an upper template and a lower template, characterized in that: It also includes an upper die core, a lower die core, a rubber block, an upper stripping plate, a lower stripping plate, a guide pillar and a guide sleeve; The upper die core and the lower die core are arranged oppositely, and their structures are basically the same, both being circular rings; The upper die core is provided with the shape of all arc punches for extruding the small arc surface of the window; The lower die core is provided with the shape of all arc punches for extruding the large arc surface of the window; The arc punch shapes of the upper die core and the lower die core are evenly distributed in the circumferential direction, and the arc punch shapes of the upper die core and the lower die core are arranged in pairs corresponding to each other; A rubber block is arranged between the upper die core and the upper stripping plate; The upper stripping plate is fitted and installed with the upper die core, the upper stripping plate is fixed on the upper die core, and the upper die core is fixedly connected with the upper template; The installation methods of the lower stripping plate, the lower die core and the lower template are the same as those of the upper stripping plate, the upper die core and the upper template. Specifically, the lower stripping plate is fixed on the lower die core, and the lower die core is fixedly connected with the lower template; A rubber block is also arranged between the lower die core and the lower stripping plate. During stripping, the rubber block prevents the parts from jamming the die, facilitating material taking; The upper template and the lower template are connected by a guide sleeve and a guide pillar. The guide sleeve is installed on the upper template, and the guide pillar is installed on the lower template corresponding to the guide sleeve; The large arc surface of the diaphragm spring is the burr surface of the window. Due to the existence of the tearing band, the window width N is 0.5 - 1 mm larger. Therefore, the width of the arc punch of the lower die core is taken as L = N + (0.5 - 1), where N represents the window width. The large arc radian R is taken as R = 2 ± 0.25, and a 3-degree slope is set at the contact position between the arc and the plane. The small arc surface is the corner collapse surface of the window, and its window width N is the normal size. The width l of the arc punch of the upper die core can directly take the window width N. The small arc radian r is taken as r = 1.25 ± 0.25, but a 2-degree slope is set at the contact position between the arc and the plane to ensure that the arc is full and has a smooth transition, eliminating stress; The shape of the arc punch of the lower die core is determined according to the size of the window based on the size of the tearing band. In addition to the arc transition, the arc punch is provided with a protrusion of a certain height M, M = 2 - 3 mm. The protrusion position can be used for window positioning, fixing the diaphragm spring at the protrusion part of the arc punch, playing a positioning role, so that the diaphragm spring is not in a loose state during extrusion.

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