Wave spring forming die

Abstract

The utility model discloses a wave spring forming die which comprises an upper die and a lower die which are of the same structure and are arranged in a hollow mode, the lower end face of the upper die and the upper end face of the lower die are respectively provided with an even number A equal division groove which is not smaller than four in the circumferential direction, die cores are arranged in the grooves at the circumferential B equal division positions of the upper die and the lower die, A is larger than B, A can be exactly divided by B, and the lower end face of the upper die and the upper end face of the lower die are provided with V-shaped grooves. The upper die and the lower die are oppositely arranged, a die core of the upper die is right opposite to the hollow groove of the lower die, and a die core of the lower die is right opposite to the hollow groove of the upper die. According to the wave spring forming die, through reasonable design of the wave spring forming die, when the spring flat gasket with the diameter between the inner diameter and the outer diameter of the upper die and the lower die needs to be punched into the wave spring with the wave crests and the wave troughs of the number B, only the corresponding die cores need to be adjusted to be installed in the grooves in the corresponding positions for different values of B, cost is low, installation is convenient and fast, and efficiency is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of spring's processing device, especially to a wave spring forming die. BACKGROUND

[0002] Spring is the basic part in mechanical equipment, which is used in many fields in modern industry, especially in the fields of mechanical industry, railway industry, construction industry, nuclear power industry, etc. The wave design of wave spring is different according to specific types and manufacturing processes, which is mainly divided into the following two cases: 1. Sine wave: the wave spring made by edge winding process usually has smooth sine wave, which can provide higher load and elastic ratio accuracy, and the elastic growth rate is consistent within the deformation range; 2. Circular arc peak valley: part of single-layer closed wave spring is manufactured by stamping process, and the peak valley presents soft circular arc curve instead of strict sine wave. This design is suitable for small stroke and large load application scenarios; the existing circular arc peak valley single-layer closed wave spring stamping die is designed according to the number of peak valley, and a set of stamping die is designed for wave spring with different number of peak valley; if multiple wave springs with different number of peak valley need to be stamped, multiple wave spring forming dies need to be designed, which is high in cost. SUMMARY

[0003] Therefore, the utility model wants to solve the technical problem: provide a kind of wave spring forming die with reasonable design, different peak, valley quantity can be quickly realized, low in cost, easy to install, high efficiency.

[0004] In order to achieve the above purpose, the utility model adopts the following technical scheme to realize:

[0005] A kind of wave spring forming die, including identical structure and hollow setting upper die and lower die, the lower end surface of the upper die and the upper end surface of the lower die are respectively circumferentially provided with an even number A of grooves not less than four, the upper die and the lower die are provided with a die core in the groove at the circumferential B division position, A is greater than B, A can be divided by B, the upper die and the lower die are oppositely arranged, the die core of the upper die is opposite to the hollow groove of the lower die, and the die core of the lower die is opposite to the hollow groove of the upper die.

[0006] As a preferred, the two side surfaces of the groove are perpendicular to the groove bottom surface.

[0007] As a preferred, the die core is connected with the groove in interference fit.

[0008] As a preferred, the top section of the die core is in circular arc shape.

[0009] As a preferred, A is an even number greater than four and less than twenty-four; the number of grooves can also be set according to actual conditions,

[0010] As preferred, the A is twelve.

[0011] As preferred, the B is two, three, four or six.

[0012] The above technical solutions can be in, the beneficial effects of the utility model are:

[0013] Compared with the prior art, the utility model discloses reasonable design to wave spring forming die, the lower end surface of upper die and the upper end surface of lower die are respectively circumferentially provided with the recess of even number A equal division not less than four, the recess in the circumferential B equal division position of upper die and lower die is equipped with the die core, A is greater than B, A can be divided by B, when the spring flat pad with the diameter between the inner diameter and the outer diameter of upper die and lower die needs to be punched into the wave spring of B number of wave crest and wave trough, the different value of B only needs to adjust the recess of corresponding position to which the corresponding die core is installed, and the cost is low, installation is convenient, and efficiency is high. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is structure schematic view of the utility model embodiment;

[0015] Figure 2 It is overhead structure schematic view of the utility model embodiment;

[0016] Figure 3 It is axial structure schematic view of the utility model embodiment;

[0017] Figure 4 It is Figure 2 It is cross section structure schematic view of the utility model embodiment in B-B direction;

[0018] Figure 5 It is structure schematic view of upper die and lower die of the utility model embodiment without die core;

[0019] Figure 6 It is structure schematic view of die core of the utility model embodiment.

[0020] In the drawings, 1, upper die;2, lower die;3, die core;4, recess;41, both sides of recess;42, recess bottom;5, spring flat pad. DETAILED DESCRIPTION

[0021] In order to make those skilled in the art further understand the features and technical contents of the utility model, please refer to the following detailed description and drawings of the utility model.

[0022] As Figures 1-6As shown, a wave spring forming mold includes an upper mold 1 and a lower mold 2 with the same structure and hollow arrangement. The lower end face of the upper mold 1 and the upper end face of the lower mold 2 are respectively provided with grooves 4 divided by an even number A of not less than four in the circumferential direction. The upper mold and the lower mold 2 are provided with mold cores 3 in the grooves 4 at the circumferential division positions B in the circumferential direction. A is greater than B and A is divisible by B. The upper mold 1 and the lower mold 2 are arranged opposite each other. The mold core 3 of the upper mold 1 is directly opposite the empty groove 4 of the lower mold 2, and the mold core 3 of the lower mold 2 is directly opposite the empty groove 4 of the upper mold 1.

[0023] like Figures 1-6 As shown, A is twelve, B is six, the two sides 41 of the groove 4 are perpendicular to the bottom surface 42 of the groove, the mold core 3 is interference-fitted with the groove 4, and the top cross section of the mold core 3 is arc-shaped.

[0024] In use, the core 3 of the upper die 1 is aligned with the empty groove 4 of the lower die 2, and the core 3 of the lower die 2 is aligned with the empty groove 4 of the upper die 1. They are then installed on a punch press. The upper die 1 is then lifted, and the spring flat pad 5 is placed on the upper surface of the lower die 2. The spring flat pad 5 is formed into a wave spring with six peaks and six troughs by stamping. If a wave spring with four peaks and four troughs or three peaks and three troughs is required, the core 3 is simply knocked out in the inner and outer diameter directions of the upper and lower dies using a tool. Then, according to the required number of peaks and troughs of the wave spring, the corresponding number of cores 3 are installed in the corresponding positions. There is no need to replace the upper and lower dies; only the position and corresponding number of cores 3 need to be changed. This method is efficient and low-cost.

[0025] In this embodiment, there are twelve grooves, which can realize the spring flat pad 5 with a diameter between the inner and outer diameters of the upper and lower molds. Wave springs with two peaks and two valleys, three peaks and three valleys, four peaks and four valleys, and six peaks and six valleys can share a mold. The number of mold cores can be changed, which is convenient, efficient, and low in cost. If the number of grooves in the upper and lower molds is different, different wave springs can be formed. The principle is the same and will not be described again.

[0026] However, the above description is only a preferred embodiment of the present utility model and is not intended to limit the patent scope of the present utility model. Therefore, all equivalent structural changes made based on the description and drawings of the present utility model are similarly included within the scope of the present utility model.

Claims

1. A wave spring forming die characterized by: The upper die (1) and the lower die (2) are hollow and have the same structure, the lower end surface of the upper die (1) and the upper end surface of the lower die (2) are respectively circumferentially provided with an even number A of grooves (4) which are not less than four, the upper die (1) and the lower die (2) are circumferentially B-divided, the grooves (4) at the circumferentially B-divided positions are provided with a die core (3), A is greater than B, A can be divided by B, the upper die (1) and the lower die (2) are oppositely arranged, the die core (3) of the upper die (1) is opposite to the empty groove (4) of the lower die (2), and the die core (3) of the lower die (2) is opposite to the empty groove (4) of the upper die (1).

2. A wave spring forming die as claimed in claim 1, wherein: The two side surfaces (41) of the groove (4) are perpendicular to the groove bottom surface (42).

3. A wave spring forming die as claimed in claim 1, wherein: The die core (3) is connected with the groove (4) in an interference fit.

4. A wave spring forming die as claimed in claim 1, wherein: The top section of the die core (3) is in the shape of a circular arc.

5. A wave spring forming die as claimed in claim 1, wherein: A is an even number greater than four and less than twenty-four.

6. A wave spring forming die as claimed in claim 5, wherein: A is twelve.

7. A wave spring forming die as claimed in claim 6, wherein: B is two, three, four or six.

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