CN214977133U

CN214977133U - Small cutting force punch structure of stamping die

Info

Publication number: CN214977133U
Application number: CN202023100006.6U
Authority: CN
Inventors: 杨世旭; 陈卫林; 计国强
Original assignee: CFTC PRECISION (JIA-XING) Ltd
Current assignee: CFTC PRECISION (JIA-XING) Ltd
Priority date: 2020-12-21
Filing date: 2020-12-21
Publication date: 2021-12-03
Anticipated expiration: 2030-12-21

Abstract

The utility model discloses a stamping die's little sanction power drift structure, drift are installed on stamping die's last die holder subassembly to reciprocate along with last die holder subassembly, characterized by: the lower end surface of the punch is a blanking knife edge surface, and the blanking knife edge surface is provided with a sharp head part protruding out of the knife edge surface. The utility model discloses can reduce the required blanking power of drift and drawing of patterns power, can reduce the possibility that the product warp again to promote product blanking quality.

Description

Small cutting force punch structure of stamping die

Technical Field

The utility model relates to a mould punching press technical field, more specifically relate to a stamping die's little sanction power drift structure.

Background

The stamping die is a special process device for processing metal materials or non-metal materials into parts or semi-finished products in cold stamping processing, and is called as a cold stamping die and commonly called as a cold stamping die. Stamping is a press working method in which a die mounted on a press is used to apply pressure to a material at room temperature to cause separation or plastic deformation of the material, thereby obtaining a desired part.

Most of the existing stamping dies adopt a punch head to stamp or blank materials. The punching and cutting knife edge face of the punch of the existing punching die is of a plane structure, and the punching structure has the defects during punching: 1. when a plane knife edge punches or trims, the whole knife edge surface is contacted with a material at the same time, and the resistance of the material groove to the punch is larger, so that the punching force and the demolding force required by the punch are larger; 2. when the distance from a hole punched on the flat knife edge surface to the edge of a product is smaller, the edge of the product is easy to deform, the thickness is thinner, and the punching quality of the product is influenced. There is room for improvement in prior art punch constructions.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art, the utility model provides a stamping die's little sanction power drift structure can reduce the required blanking force of drift and drawing of patterns power, can reduce the possibility that the product warp again to promote product blanking quality.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model provides a stamping die's little sanction power drift structure, the drift is installed on stamping die's upper die base subassembly to reciprocate along with the upper die base subassembly, characterized by: the lower end surface of the punch is a blanking knife edge surface, and the blanking knife edge surface is provided with a sharp head part protruding out of the knife edge surface.

On the basis of the above structure, the present embodiment is further configured such that the pointed portion has a conical structure.

On the basis of the above structure, the present embodiment is further configured such that the vertex angle of an isosceles triangle formed by the cross section of the pointed portion of the conical structure is greater than 120 degrees.

On the basis of the above structure, the present embodiment is further configured such that the bottom surface diameter of the pointed portion of the conical structure is smaller than the diameter of the punch.

On the basis of the above structure, the present embodiment is further configured such that the pointed portion is integrally formed on the punching blade opening surface.

Compared with the prior art, the utility model has the advantages that:

1. when punching or trimming, the edge surface is contacted with the material in a time-sharing way, and compared with the whole edge surface which is simultaneously contacted with the material, the blanking force and the demoulding force of the punch are obviously reduced;

2. after time-sharing contact, the material stress is dispersed, the product is not easy to deform, and the product blanking quality is improved.

Drawings

Fig. 1 is a schematic structural diagram of a small-force punch structure of the stamping die provided in this embodiment.

Detailed Description

The small cutting force punch structure of the stamping die of the present invention is further described with reference to fig. 1.

A small cutting force punch structure of a stamping die is provided with an upper die holder component 1 and a lower die holder component 2, wherein the upper die holder component 1 moves up and down relative to the lower die holder component 2. Punch 3 installs on stamping die's upper die base subassembly 1 to reciprocate, characterized by along with upper die base subassembly 1: the lower end surface of the punch 3 is a punching edge surface 31, and the punching edge surface 31 has a pointed portion 32 protruding from the edge surface 31. Based on the structure, when the blanking blade surface 31 with the pointed head part 32 is used for blanking materials, the blade surface 31 is in time-sharing contact with the materials, namely the top end of the pointed head part 32 is firstly in contact with the materials and stamps the materials, the contact area of the pointed head part 32 and the materials is increased along with the downward movement of the upper die holder component 1, finally, the whole blanking blade surface 31 is in contact with the materials, waste materials on the materials are cut off, the blanking mode is simultaneously in contact with the materials relative to the whole blade surface 31, the blanking force and the demoulding force of the punch 3 are obviously reduced, and the load force of a die oil cylinder is reduced; on the other hand, after the blanking knife edge surface 31 is contacted with the material in a time-sharing way through the pointed part 32, the stress of the material is dispersed, the product is not easy to deform, and the product blanking quality is improved.

Preferably, the present embodiment is further configured such that: the pointed head part 32 is of a conical structure, and in the blanking process, the contact area between the pointed head part 32 and the material is gradually increased by the aid of the conical structure and the blanking knife edge surface 31, so that time-sharing contact between the pointed head part 32 and the material is realized, blanking quality is improved, and load of a corresponding oil cylinder is reduced.

Preferably, the present embodiment is further configured such that: the tip portion 32 of the conical structure has a cross section forming an isosceles triangle having an apex angle 321 greater than 120 degrees. This structure can promote the structural strength of prong portion 32, and in blanking process, the area of contact of prong portion 32 and knife-edge face 31 and material can evenly increase moreover, further promotes the stability of blanking.

Preferably, the present embodiment is further configured such that: the diameter of the bottom surface of the tip portion 32 of the conical structure is smaller than the diameter of the punch 3. This configuration can facilitate the profile of the bite surface 31 to sever material.

Preferably, the present embodiment is further configured such that: the bottom surface of the nose portion 32 is integrally formed on the blanking edge surface 31.

As another connection mode of the pointed portion 32 and the cutting edge surface 31, a threaded hole is formed in the cutting edge surface 31, a threaded connection column is formed in the bottom surface of the pointed portion 32, and the pointed portion 32 is connected to the cutting edge surface 31 in a matched mode through connection of the threaded connection column and the threaded hole, so that the structure can facilitate replacement of the pointed portion 32 to adapt to different materials to be punched.

Unless otherwise specified, in the present invention, if the terms "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, rather than to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, the terms describing orientation or positional relationship in the present invention are used for illustrative purposes only, and should not be construed as limiting the present patent, specific meanings of the above terms can be understood by those of ordinary skill in the art in light of the specific circumstances in conjunction with the accompanying drawings.

Unless expressly stated or limited otherwise, the terms "disposed," "connected," and "connected" are used broadly and encompass both fixed and removable connections, or integral connections; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a stamping die's little sanction power drift structure, the drift is installed on stamping die's upper die base subassembly to reciprocate along with the upper die base subassembly, characterized by: the lower end surface of the punch is a blanking knife edge surface, and the blanking knife edge surface is provided with a sharp head part protruding out of the knife edge surface.

2. The small-cutting-force punch structure of a punching die as claimed in claim 1, wherein: the pointed part is of a conical structure.

3. The small-cutting-force punch structure of a punching die as claimed in claim 2, wherein: the top angle of an isosceles triangle formed by the section of the pointed head part of the conical structure is more than 120 degrees.

4. The small-cutting-force punch structure of a punching die as claimed in claim 3, wherein: the bottom surface diameter of the sharp head part of the conical structure is smaller than the diameter of the punch.

5. The small-cutting-force punch structure of a punching die as claimed in claim 4, wherein: the pointed head part is integrally formed on the surface of the punching cutter opening.