Spring plate top cover processing technology

Abstract

A spring disk top cover processing technology includes punching out a circular plate on a plate material, and opening a positioning hole in the center of the circular plate; drawing the circular plate into a first cavity and a second cavity along the axial direction of the positioning hole, wherein the positioning hole is located on the end surface of the first cavity, and the edge of one end of the circular plate forms the end edge of the second cavity, and the diameter of the second cavity is greater than the diameter of the first cavity; trimming the first cavity and the second cavity into variable diameter cavities of a set size; reducing the diameter from the middle of the side wall of the second cavity to the end edge; expanding the end edge diameter of the second cavity so that an annular concave neck is formed in the middle of the side wall of the second cavity; stamping a convex point on the end surface of the first cavity; and trimming the end edge of the second cavity, and expanding the positioning hole to a central through hole of a set size.

Description

Technical Field

[0001] The invention relates to the field of cold stamping technology, for example to a spring disk top cover processing technology. Background Art

[0002] The spring disc cover is an important mechanical transmission part, which is widely used in the mechanical transmission of automobiles and is used as a limiter for the spring in the shock absorber. Figure 1 and Figure 2 As shown, the spring disk top cover 1 on the new energy vehicle is relatively complex in design. The main body is in the shape of a hat, and the interior of the main body is formed into a variable diameter inner cavity 11. The end face of the large diameter cavity is open and an annular concave neck 12 is arranged on the side wall. A central through hole 13 is opened on the end face of the small diameter cavity, and a convex point 14 is arranged on the outer circle of the central through hole 13.

[0003] In the related art, the manufacturing process of this spring disk top cover is formed by spinning. The disadvantages of the spinning process are: 1) It is not suitable for large-scale production and complex surface processing, and the production efficiency is low; 2) The spinning process requires high-precision molds, equipment and materials, which are expensive; 3) The spinning process requires highly skilled workers to operate and manage the equipment and process in a fine manner. If the operation is wrong, it may lead to an increase in the defective rate, increasing costs and risks. Therefore, the manufacturing process in the related art cannot meet the current product molding requirements and needs to be further optimized. Summary of the invention

[0004] The present invention provides a spring disk top cover processing technology, which can change the manufacturing method in the related technology, ensure the molding quality of the spring disk top cover, reduce production costs and improve production efficiency.

[0005] An embodiment of the present invention provides a spring disk top cover processing process, comprising: punching out a circular material plate on a plate, and opening a positioning hole in the center of the circular material plate; drawing the circular material plate along the axial direction of the positioning hole to form a first cavity and a second cavity, the positioning hole is located on the end face of the first cavity, the edge of one end of the circular material plate forms the end edge of the second cavity, and the diameter of the second cavity is greater than the diameter of the first cavity; trimming the first cavity and the second cavity into variable diameter cavities of a set size; reducing the diameter from the middle of the side wall of the second cavity to the end edge; expanding the diameter of the end edge of the second cavity so that an annular concave neck is formed in the middle of the side wall of the second cavity; stamping a convex point on the end face of the first cavity; and trimming the end edge of the second cavity, and expanding the positioning hole to a central through hole of a set size. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is a structural schematic diagram of a spring pan top cover product provided by an embodiment of the present invention;

[0007] Figure 2is a top view of a spring pan cover product provided by an embodiment of the present invention;

[0008] Figure 3 is a flow chart of a spring disk top cover processing process provided by an embodiment of the present invention;

[0009] Figure 4 It is a forming schematic diagram of S10 in the spring disk top cover processing technology provided by one embodiment of the present invention;

[0010] Figure 5 It is a schematic diagram of the first step of stretching in S20 in the spring disk top cover processing process provided by one embodiment of the present invention;

[0011] Figure 6 It is a schematic diagram of the second step stretching of S20 in the spring disk top cover processing technology provided by one embodiment of the present invention;

[0012] Figure 7 It is a schematic diagram of the third step of stretching in S20 in the spring disk top cover processing process provided by one embodiment of the present invention;

[0013] Figure 8 It is a forming schematic diagram of S30 in the spring disk top cover processing technology provided by an embodiment of the present invention;

[0014] Fig. 9 yes Figure 8 A top view of

[0015] Fig.10 It is a forming schematic diagram of S40 in the spring disk top cover processing technology provided by an embodiment of the present invention;

[0016] Fig.11 yes Fig.10 A top view of

[0017] Fig.12 It is a forming schematic diagram of S50 in the spring disk top cover processing technology provided by an embodiment of the present invention;

[0018] Fig.13 yes Fig.12 A top view of

[0019] Fig.14 is a forming schematic diagram of S60 in a spring disk top cover processing process provided by an embodiment of the present invention;

[0020] Fig.15 yes Fig.14 A top view of

[0021] Fig.16 Another flow chart of a spring disk top cover processing process provided by one embodiment of the present invention.

[0022] In the figure:

[0023] 1. Spring disk top cover; 11. Variable diameter inner cavity; 12. Annular concave neck; 13. Center perforation; 14. Protrusion;

[0024] 2. Circular material plate; 3. Positioning hole; 4. First concave cavity; 5. Second concave cavity. DETAILED DESCRIPTION

[0025] This embodiment provides a spring disk top cover processing technology for Figure 1 and Figure 2 The spring disk top cover 1 shown is optimized in process to solve the problems of high process difficulty, high cost, high defect rate and low production efficiency in the spin forming method in the related art, so as to ensure the forming quality.

[0026] In one embodiment, if Figure 3 and Fig.16 As shown, the spring disc top cover processing technology includes the following steps:

[0027] In S10, blanking and punching: a circular plate 2 is punched out from a plate, and a positioning hole 3 is opened in the center of the circular plate 2. Figure 4 .

[0028] In S20, stretching: the circular material plate 2 is drawn along the axial direction of the positioning hole 3 to form the first cavity 4 and the second cavity 5, the positioning hole 3 is located on the end face of the first cavity 4, the edge of one end of the circular material plate 2 forms the end edge of the second cavity 5, and the diameter of the second cavity 5 is greater than the diameter of the first cavity 4.

[0029] In one embodiment, in S20, in order to avoid excessive or inadequate stretching affecting the stretching quality, the circular sheet 2 is stretched in steps, see Figures 5 to 7 First, stretch out the second cavity 5 with a large diameter, and then stretch out the first cavity 4 with a small diameter. It is necessary to pay attention to the wall thickness of the connection between the first cavity 4 and the second cavity 5.

[0030] In S30, shaping: the first cavity 4 and the second cavity 5 are trimmed into a variable diameter inner cavity 11 of a set size, see Figure 8 and Fig. 9 .

[0031] Here, the corners of the side wall and the end face of the first cavity 4 and the connection between the first cavity 4 and the second cavity 5 are mainly trimmed to ensure the shape of the variable diameter inner cavity 11.

[0032] In S40, the closing is to reduce the diameter of the side wall of the second cavity 5 from the middle to the end edge, see Fig.10 and Fig.11 .

[0033] In S50, the expansion is performed by enlarging the diameter of the end edge of the second cavity 5, so that an annular concave neck 12 is formed in the middle of the side wall of the second cavity 5 by first contracting and then expanding. Fig.12 and Fig.13 .

[0034] In S60, convex bulge is formed: a convex point 14 is formed by punching on the end surface of the first cavity 4, see Fig.14 and Fig.15 Here, four protrusions 14 are provided, and the four protrusions 14 are evenly distributed around the positioning hole 3 .

[0035] In S70, trimming and punching: trimming the end edge of the second cavity 5 and expanding the positioning hole 3 to a central through hole 13 of a set size, and finally obtaining a spring disk top cover 1 of a target shape.

[0036] Therefore, the above-mentioned spring disk top cover processing technology changes the spin forming method in the related technology, and is formed by stamping a piece of plate, thereby forming a spring disk top cover 1 product with good consistency, meeting the precision requirements and shape requirements of the spring disk top cover 1, and the finished product size is stable, which reduces the processing difficulty and improves the production efficiency.

Claims

1. Spring plate top cover processing technology, including: Punching out a circular plate (2) on the plate, and opening a positioning hole (3) at the center of the circular plate (2); The circular material plate (2) is drawn along the axial direction of the positioning hole (3) to form a first concave cavity (4) and a second concave cavity (5), wherein the positioning hole (3) is located on the end surface of the first concave cavity (4), the edge of one end of the circular material plate (2) forms the end edge of the second concave cavity (5), and the diameter of the second concave cavity (5) is greater than the diameter of the first concave cavity (4); trimming the first concave cavity (4) and the second concave cavity (5) into a variable diameter inner cavity (11) of a set size; reducing the diameter of the side wall of the second cavity (5) from the middle to the end edge; Enlarging the diameter of the end edge of the second cavity (5) so that an annular concave neck (12) is formed in the middle of the side wall of the second cavity (5); A convex point (14) is formed by stamping on the end surface of the first cavity (4); and The end edge of the second cavity (5) is trimmed, and the positioning hole (3) is enlarged to a central through hole (13) of a set size.

2. The spring disk top cover processing technology according to claim 1, wherein: The circular material plate (2) is drawn into a first cavity (4) and a second cavity (5) along the axial direction of the positioning hole (3), the second cavity (5) being drawn out first, and then the first cavity (4) being drawn out.

3. The spring disk top cover processing technology according to claim 1, wherein: In the process of trimming the first concave cavity (4) and the second concave cavity (5) into a variable diameter inner cavity (11) of a set size, the corners between the side wall and the end face of the first concave cavity (4) and the connection between the first concave cavity (4) and the second concave cavity (5) are trimmed.

4. The spring disk top cover processing technology according to claim 1, wherein: The protrusions (14) are punched out on the end surface of the first cavity (4), wherein four protrusions (14) are provided and the four protrusions (14) are evenly distributed around the positioning hole (3).

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