A die rod core for a punch forming of a day-shaped workpiece

Abstract

The application provides a mold rod core for punching and forming a hollow square workpiece, which comprises a base, a group of vertical columns arranged on the base, a forming surface arranged at the end of the group of vertical columns away from the base, and a powder guide assembly arranged on the forming surface. When the forming surface contacts a pre-punching area of the hollow square workpiece and is punched, the powder guide assembly can guide the powder stripped from the hollow square workpiece to the base. The powder guide assembly can guide the stripped ferrite powder to the base in real time during the punching and forming process of the hollow square workpiece with powder adhered to the middle column, effectively avoids the situation that the powder is adhered to the forming surface, effectively maintains the flatness and precision of the forming surface, reduces the frequency of deformation of the workpiece during the punching process, significantly improves the product qualification rate and production efficiency, and does not need to frequently stop and clean the forming surface. The application has the advantages of reducing equipment maintenance cost, simple structure and easy popularization and implementation.

Description

Technical Field

[0001] The present application belongs to the technical field of stamping forming, and in particular relates to a die core for stamping and forming a Japanese-shaped workpiece. Background Art

[0002] In the prior art, Japanese-shaped workpieces are usually produced by stamping, and the die core for stamping and forming is the core component for the production of such workpieces. In addition, in order to meet the use requirements of some special products, ferrite powder is usually filled in the regions on both sides of the center pillar of the Japanese-shaped workpiece. During the stamping forming process, the die core directly determines the forming accuracy, dimensional consistency and production efficiency of the workpiece, which is crucial to the stability of product quality of the Japanese-shaped workpiece. However, existing die cores have significant defects in long-term mass stamping operations.

[0003] In the prior art, the stamping working surface of the die core is mostly made of conventional metal materials. Although it has basic hardness and wear resistance and can meet the requirements of short-term small-batch production, when stamping a workpiece with ferrite powder filled on both sides of the center pillar, due to the hardness and particle characteristics of the ferrite powder, the ferrite powder continuously and intensely rubs against the working surface. This friction causes part of the ferrite powder to peel off from the filling area of the workpiece and gradually adhere to the working surface of the die core. As the number of stampings increases, the adhered powder continuously accumulates, which destroys the original flatness and surface accuracy of the working surface.

[0004] When the working surface accuracy of the die core drops to a threshold value, it will directly cause subsequent workpieces to deform (such as center pillar offset, uneven thickness of the filling area), reduce the dimensional qualification rate, and at the same time intensify the wear of the working surface, shorten the service life of the die core, increase the cost of enterprise equipment maintenance and replacement, and seriously affect the production efficiency and cost control of ferrite products. Therefore, improvements are urgently needed to ensure the stamping quality of workpieces and reduce the defective rate. Utility Model Content

[0005] To solve the technical problem in the prior art that when stamping a Japanese-shaped workpiece with ferrite powder filled in the center pillar, the die core is prone to friction with the powder, which causes the ferrite powder to peel off and adhere to the working surface, and as the number of stamping increases, the ferrite powder adheres to the working surface of the die core, which reduces the working surface accuracy of the die core, thereby causing workpiece deformation, reducing the qualification rate and lowering the production efficiency, the present application provides a die core for stamping and forming a Japanese-shaped workpiece.

[0006] In order to solve the technical problem proposed in the present application, the present application further provides a die for stamping and forming a Japanese-shaped workpiece.

[0007] This application adopts the following solution: a die core for stamping and forming a H-shaped workpiece, including a base, a set of inserts vertically disposed on the base, a forming surface disposed on one end of the inserts away from the base, and a powder guiding component disposed on the forming surface. When the forming surface contacts the preset punching area of ​​the H-shaped workpiece, the powder guiding component is used to guide the powder peeled off from the H-shaped workpiece to the base.

[0008] In some feasible embodiments, the insert assembly includes a first insert on one side of the base and a second insert on the other side of the base. The molding surface includes a first molding surface on the first insert away from the base and a second molding surface on the second insert away from the base. The powder guiding assembly includes a first powder guiding surface on the side of the first molding surface and a second powder guiding surface on the side of the second molding surface. The first powder guiding surface and the second powder guiding surface are arranged facing each other relative to the central axis of the base.

[0009] In some feasible embodiments, the first powder guiding surface is inclined relative to the first molding surface, and the first powder guiding surface is inclined relative to the first molding surface in the direction of approaching the base.

[0010] In some feasible embodiments, the tilt angle of the first powder guiding surface relative to the first forming surface is defined as A, wherein A satisfies the following relationship: 30°≤A≤60°.

[0011] In some feasible embodiments, the height of the first insertion post is defined as H, and the projection height of the first powder guiding surface along the vertical direction is defined as h. The relationship between H and h is: 5.2≤H / h≤15.5.

[0012] In some feasible embodiments, the cross-sectional shape of the first powder-guiding surface in the horizontal direction is an isosceles trapezoid.

[0013] In some feasible embodiments, the width of the first insertion post is defined as K, and the projected width of the first powder guiding surface along the vertical direction is defined as k. K and k satisfy the following relationship: 2.5≤K / k≤3.3.

[0014] In some feasible embodiments, it also includes clearance chamfers respectively provided on both sides of the first insert post, and the first powder guiding surface is provided between the two clearance chamfers.

[0015] In order to solve the technical problems raised in this application, this application also provides a die for stamping and forming a H-shaped workpiece, including the above-mentioned die core for stamping and forming a H-shaped workpiece, and a die sleeve inserted into the die core for stamping and forming a H-shaped workpiece.

[0016] Compared with the prior art, this application has the following beneficial effects:

[0017] The present application provides a die core for stamping forming of #-shaped workpieces, which comprises a base, a post group vertically arranged on the base, a forming surface arranged at one end of the post group away from the base, and a powder guiding assembly arranged on the forming surface. When the forming surface contacts and stamps the preset punching area of the #-shaped workpiece, the powder guiding assembly can guide the powder stripped from the #-shaped workpiece to the base. In the present application, by arranging the powder guiding assembly on the forming surface, during the stamping forming process of the #-shaped workpiece with powder attached to the central column, the powder guiding assembly can guide the stripped ferrite powder to the base in real time, effectively avoiding the situation that powder adheres to the forming surface, effectively maintaining the flatness and precision of the forming surface, reducing the frequency of deformation of the workpiece during the stamping process, significantly improving product qualification rate and production efficiency, and eliminating the need for frequent shutdown to clean the forming surface. The present invention has the advantages of reducing equipment maintenance cost, simple structure, and being convenient for popularization and implementation. Description of Drawings

[0018] Figure 1 is a structural schematic diagram of a die core for stamping forming of #-shaped workpieces in the prior art;

[0019] Figure 2 is a structural schematic diagram of a die core for stamping forming of #-shaped workpieces of the present application;

[0020] Figure 3 is a structural schematic diagram of a die for stamping forming of #-shaped workpieces in the prior art;

[0021] Figure 4 is a structural schematic diagram of a die for stamping forming of #-shaped workpieces of the present application;

[0022] Figure 5 is a top view of the #-shaped workpiece of the present application;

[0023] Figure 6 is a top view of the die core for stamping forming of #-shaped workpieces of the present application;

[0024] Figure 7 is a side view of the die core for stamping forming of #-shaped workpieces of the present application. Detailed Description of Embodiments

[0025] in combination with Figures 1 to 7 the content shown further describes the technical solution proposed by the present application. The present application adopts the following technical solution: a die core for stamping forming of #-shaped workpieces, comprising a base 1, a post group 2 vertically arranged on the base 1, a forming surface 3 arranged at an end of the post group 2 away from the base 1, and a powder guiding assembly 4 arranged on the forming surface 3. When the forming surface 3 contacts the preset punching area of the #-shaped workpiece, the powder guiding assembly 4 is configured to guide the powder stripped from the #-shaped workpiece to the base 1.

[0026] This application provides a die core for stamping H-shaped workpieces, comprising a base, a set of inserts vertically disposed on the base, a forming surface disposed at the end of the inserts away from the base, and a powder guiding component disposed on the forming surface. When the forming surface contacts and stamps the pre-punched area of ​​the H-shaped workpiece, the powder guiding component can guide the powder peeled off from the H-shaped workpiece to the base. By setting the powder guiding component on the forming surface, during the stamping process of the H-shaped workpiece with powder attached to the central column, the powder guiding component can guide the peeled ferrite powder to the base in real time, effectively preventing the powder from adhering to the forming surface, effectively maintaining the flatness and accuracy of the forming surface, reducing the frequency of deformation during workpiece stamping, significantly improving product qualification rate and production efficiency, and eliminating the need for frequent machine shutdowns to clean the forming surface. It has the advantages of reducing equipment maintenance costs, simple structure, and ease of promotion and implementation.

[0027] In actual operation, the H-shaped workpiece (with its columns filled with ferrite powder) is conveyed above the forming surface, and the stamping equipment applies downward pressure, ensuring close contact between the pre-punched area of ​​the workpiece and the forming surface. As the pressure continues to be applied, some of the ferrite powder in the columns of the H-shaped workpiece is squeezed and easily peels off from the workpiece surface. The peeled powder then naturally slides down to the bottom of the base through the powder guiding component. The ferrite powder guided to the bottom of the base can be centrally processed through a pre-set collection tank on the base or an external powder recovery device, preventing powder accumulation inside the equipment.

[0028] In this embodiment, the insert assembly 2 includes a first insert 20 disposed on one side of the base 1 and a second insert 21 disposed on the other side of the base 1. The molding surface 3 includes a first molding surface 30 disposed on the end of the first insert 20 away from the base 1 and a second molding surface 31 disposed on the end of the second insert 21 away from the base 1. The powder guiding assembly 4 includes a first powder guiding surface 40 disposed on the side of the first molding surface 30 and a second powder guiding surface 41 disposed on the side of the second molding surface 31. The first powder guiding surface 40 and the second powder guiding surface 41 are arranged facing each other relative to the central axis of the base 1.

[0029] In this embodiment, the first powder guiding surface 40 is inclined relative to the first molding surface 30, and the first powder guiding surface 40 is inclined towards the base 1 relative to the first molding surface 30.

[0030] In this embodiment, the tilt angle of the first powder guiding surface 40 relative to the first forming surface 30 is defined as A, and A satisfies the following relationship: 30°≤A≤60°.

[0031] For example, the value of A is 30°, 40°, 45°, 50°, or 60°.

[0032] In actual implementation, when the H-shaped workpiece (with its column filled with ferrite powder) is conveyed above the forming surface, the stamping equipment applies downward pressure, and the pre-punched area of ​​the H-shaped workpiece comes into close contact with the first and second forming surfaces. As the pressure increases, the ferrite powder in the column of the workpiece is squeezed and peeled off. At this time, the first and second powder guiding surfaces, which are set opposite each other on both sides, come into play: because the first powder guiding surface is inclined relative to the first forming surface towards the base, the peeled powder slides down the inclined slope of the first powder guiding surface; similarly, the second powder guiding surface, with the same inclination direction and angle, synchronously guides the peeled powder on its side to the base. By designing the size of the inclination angle of the first powder guiding surface relative to the first forming surface, both too small an angle that would cause powder accumulation and too large an angle are avoided, ensuring that the powder concentrates towards the base at a stable rate.

[0033] In this embodiment, the height of the first insertion post 20 is defined as H, and the projection height of the first powder guiding surface 40 along the vertical direction is defined as h. The relationship between H and h is as follows: 5.2≤H / h≤15.5.

[0034] For example, the values ​​of H / h are 5.2, 5.3, 6.5, 7.5, 10, 12, 15, and 15.5.

[0035] In this embodiment, the cross-sectional shape of the first powder guiding surface 40 along the horizontal direction is an isosceles trapezoid.

[0036] In this embodiment, the width of the first insert 20 is defined as K, and the projection width of the first powder guiding surface 40 along the vertical direction is k. K and k satisfy the following relationship: 2.5≤K / k≤3.3.

[0037] For example, the values ​​of K / k are 2.5, 3, and 3.3.

[0038] In this embodiment, the implementation process also includes clearance chamfers 5 respectively provided on both sides of the first insert post 20, and the first powder guiding surface 40 is provided between the two clearance chamfers 5.

[0039] In order to solve the technical problems raised in this application, this application provides a die for stamping and forming a H-shaped workpiece, including the above-mentioned die core for stamping and forming a H-shaped workpiece, and a die sleeve 6 inserted into the die core for stamping and forming a H-shaped workpiece.

[0040] In practice, setting a chamfer can effectively reduce resistance during the stamping process.

[0041] This application provides a die core for stamping H-shaped workpieces, comprising a base, a set of inserts vertically disposed on the base, a forming surface disposed at the end of the inserts away from the base, and a powder guiding component disposed on the forming surface. When the forming surface contacts and stamps the pre-punched area of ​​the H-shaped workpiece, the powder guiding component can guide the powder peeled off from the H-shaped workpiece to the base. By setting the powder guiding component on the forming surface, during the stamping process of the H-shaped workpiece with powder attached to the central column, the powder guiding component can guide the peeled ferrite powder to the base in real time, effectively preventing the powder from adhering to the forming surface, effectively maintaining the flatness and accuracy of the forming surface, reducing the frequency of deformation during workpiece stamping, significantly improving product qualification rate and production efficiency, and eliminating the need for frequent machine shutdowns to clean the forming surface. It has the advantages of reducing equipment maintenance costs, simple structure, and ease of promotion and implementation.

[0042] The embodiments provided by this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that those skilled in the art can make several improvements and modifications to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A mold core for stamping forming of a work piece shaped like the Chinese character "ri", characterized in that Includes a base (1), a set of inserts (2) vertically disposed on the base (1), a forming surface (3) disposed on the end of the inserts (2) away from the base (1), and a powder guiding component (4) disposed on the forming surface (3). When the forming surface (3) contacts the preset punching area of ​​the H-shaped workpiece, the powder guiding component (4) is used to guide the powder peeled off from the H-shaped workpiece to the base (1).

2. The die core for stamping a H-shaped workpiece according to claim 1, characterized in that, The insert assembly (2) includes a first insert (20) on one side of the base (1) and a second insert (21) on the other side of the base (1). The molding surface (3) includes a first molding surface (30) on the end of the first insert (20) away from the base (1) and a second molding surface (31) on the end of the second insert (21) away from the base (1). The powder guiding assembly (4) includes a first powder guiding surface (40) on the side of the first molding surface (30) and a second powder guiding surface (41) on the side of the second molding surface (31). The first powder guiding surface (40) and the second powder guiding surface (41) are arranged facing each other relative to the central axis of the base (1).

3. The die core for stamping a H-shaped workpiece according to claim 2, characterized in that, The first powder guiding surface (40) is inclined relative to the first molding surface (30), and the first powder guiding surface (40) is inclined towards the base (1) relative to the first molding surface (30).

4. The die core for stamping a H-shaped workpiece according to claim 3, characterized in that, The inclination angle of the first powder guiding surface (40) relative to the first forming surface (30) is defined as A, and A satisfies the following relationship: 30°≤A≤60°.

5. The die core for stamping a H-shaped workpiece according to claim 2, characterized in that, The height of the first insert (20) is defined as H, and the projection height of the first powder guiding surface (40) along the vertical direction is defined as h. The relationship between H and h is as follows: 5.2≤H / h≤15.

5.

6. The die core for stamping a H-shaped workpiece according to claim 2, characterized in that, The first powder guiding surface (40) has an isosceles trapezoidal cross-sectional shape along the horizontal direction.

7. The die core for stamping a H-shaped workpiece according to claim 2, characterized in that, The width of the first insert (20) is defined as K, and the projection width of the first powder guiding surface (40) along the vertical direction is defined as k. K and k satisfy the following relationship: 2.5≤K / k≤3.

3.

8. The die core for stamping a H-shaped workpiece according to claim 2, characterized in that, It also includes clearance chamfers (5) respectively provided on both sides of the first insert (20), and the first powder guiding surface (40) is provided between the two clearance chamfers (5).

9. A die for stamping forming of a workpiece in a shape of a Chinese character "ri", characterized in that It includes a die core for stamping a H-shaped workpiece according to any one of claims 1-8, and a die sleeve (6) inserted into the die core for stamping a H-shaped workpiece.

Images