Multi-step cold heading forming die

Abstract

The utility model relates to the field of cold heading forming dies, in particular to a multi-step cold heading forming die which comprises a strong ring, a bottom diaphragm, a left step diaphragm, a right step diaphragm, a front half-arch-shaped step diaphragm set and a rear half-arch-shaped step diaphragm set. The step width of the left step diaphragm and the step width of the right step diaphragm are decreased upwards, the left step diaphragm and the right step diaphragm are arranged in the strong ring in an attached mode, and the front half-arch-shaped step diaphragm set is arranged on the front side between the left step diaphragm and the right step diaphragm and arranged in the strong ring in an attached mode. The rear half arch-shaped step diaphragm set is arranged on the rear side between the left step diaphragm and the right step diaphragm and arranged in the strong ring in an attached mode, the bottom diaphragm is arranged in the strong ring in an attached mode and located at the upper end of the left step diaphragm and the upper end of the right step diaphragm, and a multi-step combination mode is adopted for the die piece. And die damage caused by assembly deviation is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the cold upsetting forming die field relates to a kind of multi-step cold upsetting forming die. BACKGROUND

[0002] In the cold upsetting forming die field, especially for the manufacture of multi-step shaft parts, there are some limitations and challenges in the prior art. In the field of automobile safety belt production on the market, the common five-mold sleeve piece combination die is to press four mold pieces into the reinforcing ring in turn. However, such combination die is prone to deviation during mold assembly, and the force during production is not the same, the sleeve piece will expand, and then the force is uneven, resulting in low service life of the sleeve piece, thereby reducing the quality of the die, and the cost is also high.

[0003] Therefore, in order to solve the problems in the prior art, a multi-step cold upsetting forming die with simple structure needs to be designed. INVENTION CONTENTS

[0004] The utility model discloses to solve the prior art problem and provide a kind of multi-step cold upsetting forming die.

[0005] The utility model discloses a kind of multi-step cold upsetting forming die, including: strong ring, bottom film piece, left ladder film piece, right ladder film piece, front half-arch ladder film piece group and rear half-arch ladder film piece group, the cross-sectional diameter of the strong ring is set up upwards increasing, the ladder width of the left ladder film piece and right ladder film piece is set up upwards decreasing, the left ladder film piece and right ladder film piece are attached and set in the inside of strong ring, the front half-arch ladder film piece group is set between the left ladder film piece and right ladder film piece front side and is attached and set in the inside of strong ring, the rear half-arch ladder film piece group is set between the left ladder film piece and right ladder film piece rear side and is attached and set in the inside of strong ring, the bottom film piece is attached and set in the inside of strong ring and is located the upper end of left ladder film piece and right ladder film piece.

[0006] Further improvement, the front half-arch film piece group includes front side bottom layer film piece, front side middle layer film piece and front side upper layer film piece.

[0007] Further improvement, the rear half-arch film piece group includes rear side bottom layer film piece, rear side middle layer film piece and rear side upper layer film piece.

[0008] Further improvement, the front side bottom layer film piece, front side middle layer film piece and front side upper layer film piece are sequentially set upwards, the front side bottom layer film piece is set in the front side bottom between the left ladder film piece and right ladder film piece, the front side middle layer film piece is set in the front side middle between the left ladder film piece and right ladder film piece, and the front side upper layer film piece is set in the front side upper layer between the left ladder film piece and right ladder film piece.

[0009] Further improvement, the back side bottom layer film piece, the back side middle layer film piece and the back side upper layer film piece are sequentially arranged upwards, the back side bottom layer film piece is arranged at the back side bottom between the left ladder film piece and the right ladder film piece, the back side middle layer film piece is arranged at the back side middle between the left ladder film piece and the right ladder film piece, and the back side upper layer film piece is arranged at the back side upper layer between the left ladder film piece and the right ladder film piece.

[0010] Compared with the prior art, the multi-step cold heading forming die has the beneficial effects that:

[0011] The left ladder film piece and the right ladder film piece are placed upwards, then the front side bottom layer film piece, the front side middle layer film piece and the front side upper layer film piece are sequentially placed downwards at the front side between the left ladder film piece and the right ladder film piece, the back side bottom layer film piece, the back side middle layer film piece and the back side upper layer film piece are sequentially placed downwards at the back side between the left ladder film piece and the right ladder film piece, then the above-mentioned whole is placed in the inside of the strong ring, and finally the bottom film piece is placed in the inside of the strong ring. The film piece adopts the multi-step combination mode, in the film piece assembly process, the die is not damaged due to the assembly deviation problem, so that the service life of the die is increased, meanwhile, the quality of the multi-step film piece is improved, and the production efficiency is also improved; meanwhile, the left ladder film piece and the right ladder film piece are integral structures, and there is no uneven expansion phenomenon under stress. BRIEF DESCRIPTION OF DRAWINGS

[0012] Fig. 1 It is a structural schematic view of the utility model

[0013] Fig. 2 It is an exploded structural schematic view of the utility model

[0014] Fig. 3 It is a structural schematic view of the utility model section view

[0015] Fig. 4 It is a structural schematic view of another view section view of the utility model

[0016] Fig. 5 It is a structural schematic view of the prior art structure

[0017] Fig. 6 It is an exploded structural schematic view of the prior art structure

[0018] In the drawing, 1 is a strong ring, 2 is a bottom film piece, 3 is a left ladder film piece, 4 is a right ladder film piece, 5 is a front half-arched ladder film piece group, 51 is a front side bottom layer film piece, 52 is a front side middle layer film piece, 53 is a front side upper layer film piece, 6 is a back half-arched ladder film piece group, 61 is a back side bottom layer film piece, 62 is a back side middle layer film piece, 63 is a back side upper layer film piece, and 7 is a ring film piece. DETAILED DESCRIPTION

[0019] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] The following is a description of the embodiments and appendices. Figs. 1-6 The technical solution of this utility model will be further described below.

[0022] Example 1

[0023] A multi-step cold heading die includes: a reinforcing ring 1, a bottom diaphragm 2, a left stepped diaphragm 3, a right stepped diaphragm 4, a front semi-arched stepped diaphragm group 5, and a rear semi-arched stepped diaphragm group 6. The cross-sectional diameter of the reinforcing ring 1 is increased upwards, and the step width of the left stepped diaphragm 3 and the right stepped diaphragm 4 is decreased upwards. The left stepped diaphragm 3 and the right stepped diaphragm 4 are fitted together inside the reinforcing ring 1. The front semi-arched stepped diaphragm group 5 is located on the front side between the left stepped diaphragm 3 and the right stepped diaphragm 4 and is fitted together inside the reinforcing ring 1. The rear semi-arched stepped diaphragm group 6 is located on the rear side between the left stepped diaphragm 3 and the right stepped diaphragm 4 and is fitted together inside the reinforcing ring 1. The bottom diaphragm 2 is fitted together inside the reinforcing ring 1 and located above the left stepped diaphragm 3 and the right stepped diaphragm 4.

[0024] As a further preferred embodiment, the front semi-arched diaphragm group 5 includes a front bottom layer diaphragm 51, a front middle layer diaphragm 52, and a front top layer diaphragm 53.

[0025] As a further preferred embodiment, the rear semi-arched diaphragm group 6 includes a rear bottom layer diaphragm 61, a rear middle layer diaphragm 62, and a rear top layer diaphragm 63.

[0026] As a further preferred embodiment, the front bottom layer membrane 51, the front middle layer membrane 52, and the front top layer membrane 53 are arranged sequentially upwards. The front bottom layer membrane 51 is disposed at the front bottom between the left stepped membrane 3 and the right stepped membrane 4. The front middle layer membrane 52 is disposed at the front middle between the left stepped membrane 3 and the right stepped membrane 4. The front top layer membrane 53 is disposed at the front top layer between the left stepped membrane 3 and the right stepped membrane 4.

[0027] As a further preferred embodiment, the rear bottom layer membrane 61, the rear middle layer membrane 62, and the rear top layer membrane 63 are arranged sequentially upwards. The rear bottom layer membrane 61 is disposed at the rear bottom between the left stepped membrane 3 and the right stepped membrane 4. The rear middle layer membrane 62 is disposed at the rear middle between the left stepped membrane 3 and the right stepped membrane 4. The rear top layer membrane 63 is disposed at the rear upper layer between the left stepped membrane 3 and the right stepped membrane 4.

[0028] like Figs. 1-6 As shown, the working principle of this utility model is to address the problems of assembly deviation in the five-module kit (due to the lack of connection between each module layer) and poor mold quality in the existing technology.

[0029] The existing three independent modules are split into four parts, which are modified into the left stepped membrane 3, right stepped membrane 4, front semi-arched stepped membrane group 5 and rear semi-arched stepped membrane group 6 in this application. The left stepped membrane 3 and right stepped membrane 4 are three-layer integral in a stepped shape. The remaining front semi-arched stepped membrane group 5 and rear semi-arched stepped membrane group 6 are assembled by stacking semi-arched membranes. Specifically, the left stepped membrane 3 and right stepped membrane 4 are placed upwards. Then, the front bottom membrane 51, front middle membrane 52 and front top membrane are placed downwards in sequence on the front side between the left stepped membrane 3 and right stepped membrane 4. The rear bottom membrane 61, rear middle membrane 62 and rear top membrane 63 are placed downwards in sequence on the rear side between the left stepped membrane 3 and right stepped membrane 4. Then, the above integral is placed inside the strong ring 1. Finally, the bottom membrane 2 is placed inside the strong ring 1.

[0030] The mold pieces adopt a multi-step combination method, which will not cause mold damage due to assembly deviation during the mold piece assembly process, thereby increasing the service life of the mold. At the same time, the quality of the multi-step mold pieces is improved, and the production efficiency is also increased.

[0031] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A cold heading forming die for a multi-step, characterized by, The strong ring, the bottom film sheet, the left ladder film sheet, the right ladder film sheet, the front half-arch ladder film sheet group and the rear half-arch ladder film sheet group, the cross-section diameter of the strong ring is increased upward, the ladder width of the left ladder film sheet and the right ladder film sheet is decreased upward, the left ladder film sheet and the right ladder film sheet are arranged in the strong ring, the front half-arch ladder film sheet group is arranged between the left ladder film sheet and the right ladder film sheet and is arranged in the strong ring, the rear half-arch ladder film sheet group is arranged between the left ladder film sheet and the right ladder film sheet and is arranged in the strong ring, and the bottom film sheet is arranged in the strong ring and is located at the upper end of the left ladder film sheet and the right ladder film sheet.

2. A multi-step cold heading forming die according to claim 1, wherein The front half-arch ladder film sheet group comprises a front side bottom layer film sheet, a front side middle layer film sheet and a front side upper layer film sheet.

3. The cold heading die for a multi-step according to claim 1, wherein The rear half-arch ladder film sheet group comprises a rear side bottom layer film sheet, a rear side middle layer film sheet and a rear side upper layer film sheet.

4. The cold heading die for multi-step forming according to claim 2, wherein The front side bottom layer film sheet, the front side middle layer film sheet and the front side upper layer film sheet are arranged upward in sequence, the front side bottom layer film sheet is arranged at the front side bottom between the left ladder film sheet and the right ladder film sheet, the front side middle layer film sheet is arranged at the front side middle between the left ladder film sheet and the right ladder film sheet, and the front side upper layer film sheet is arranged at the front side upper layer between the left ladder film sheet and the right ladder film sheet.

5. The cold heading die for forming a multi-step according to claim 3, wherein The rear side bottom layer film sheet, the rear side middle layer film sheet and the rear side upper layer film sheet are arranged upward in sequence, the rear side bottom layer film sheet is arranged at the rear side bottom between the left ladder film sheet and the right ladder film sheet, the rear side middle layer film sheet is arranged at the rear side middle between the left ladder film sheet and the right ladder film sheet, and the rear side upper layer film sheet is arranged at the rear side upper layer between the left ladder film sheet and the right ladder film sheet.

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