CN214235893U

CN214235893U - A tear punching pin and tear subassembly for shield cover production

Info

Publication number: CN214235893U
Application number: CN202023322771.2U
Authority: CN
Inventors: 汪进; 李仁贵; 朱新爱
Original assignee: Hunan Laimu Electronics Co ltd
Current assignee: Hunan Laimu Electronics Co ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-09-21
Anticipated expiration: 2030-12-31

Abstract

The utility model relates to a tear punching pin and tear subassembly for shield cover production, including the punching pin main part, tear the sword main part, the thickness that tears the sword main part is 15 ~ 35% of the thickness of punching pin main part, be equipped with thickness degressive transitional coupling section between the punching pin main part and the tearing sword main part, the tip that tears the sword main part is equipped with the punching pin edge of a knife, the punching pin main part, tear sword main part transitional coupling section, punching pin edge of a knife be the integrated into one piece structure. Compared with the prior art, the utility model provides a tear the punching pin and tear the subassembly and come to replace the thin strip material technology of linking among the prior art with tearing the technology, avoided the regional formation of large-scale unloading, the width that tears the region only for the thickness of tearing the sword main part, rank below 1mm for interval between the adjacent shield cover is showing and is reducing, has avoided the waste of raw materials basically, realizes that the product does not have waste material formula press die basically.

Description

A tear punching pin and tear subassembly for shield cover production

Technical Field

The utility model belongs to the technical field of shield cover production and specifically relates to a tear punching pin and tear subassembly for shield cover production is related to.

Background

The shielding cover exists on products requiring shielding function on communication terminal products, the shielding cover is assembled on a PCB of an electronic module, electromagnetic waves are mainly blocked outside the shielding cover and are prevented from being damaged by electromagnetic radiation, and the shielding cover is a tool for shielding electronic signals and has the function of shielding the influence of external electromagnetic waves on an internal circuit and the outward radiation of the electromagnetic waves generated inside.

Due to the rapid development of the 5G technology, more efficient blocking of harmful electromagnetic waves is required, so that a plurality of shielding cases are required to be applied to the same product to shield the influence of external electromagnetic waves on internal circuits and simultaneously shield the outward radiation of the electromagnetic waves generated inside.

In the prior art, a progressive die (progressive die) is utilized to manufacture the shielding cover, a press machine adopts a strip-shaped stamping raw material in a stamping stroke, a plurality of cold stamping dies of a plurality of stamping processes are simultaneously completed on a pair of dies by a plurality of different stations, and the material strip moves once at a fixed distance after the dies are stamped until the product is completed. In the forming process, except for the continuous material of the thin belt, a larger pre-blanking area 8 exists on the periphery, referring to fig. 3, the pre-blanking area 8 needs to be blanked first, and then the processes of stretching, shaping and the like are completed until the final forming process is completed. However, the raw materials of the product mainly adopt the copper foil strip, the price is high, and the cost of the raw materials required by the whole product manufacture is high due to the fact that the raw materials are firstly fed (the raw materials are not fully utilized).

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a tear the punching pin and tear the subassembly for the shield cover production in order to overcome the defect that above-mentioned prior art exists, tear the punching pin and tear the subassembly through among this technical scheme and come to replace the thin strip material technology of linking among the prior art with tearing the technology, avoided the regional formation of large-scale unloading.

The purpose of the utility model can be realized through the following technical scheme:

the utility model discloses a first purpose protects a tear punching pin for shield cover production, including punching pin main part, tear the sword main part, the thickness that tears the sword main part is 15 ~ 35% of the thickness of punching pin main part, be equipped with thickness degressive transitional coupling section between punching pin main part and the tearing sword main part, the tip that tears the sword main part is equipped with the punching pin edge of a knife, the punching pin main part, tear sword main part, transitional coupling section, punching pin edge of a knife be the integrated into one piece structure.

Further, the knife edge angle of the knife edge of the punch ranges from 15 degrees to 25 degrees.

Further preferably, the knife edge angle of the punch knife edge is 20 °.

Further, the length L of the tearing knife main body is larger than the thickness of the shielding case by 0.15-0.45 mm.

Further preferably, the length L of the tearing knife body is greater than the shield thickness by 0.3 mm.

Furthermore, the punch main body, the transition connecting section and the upper surface of the tearing knife main body are connected in sequence in a coplanar manner.

Further, the lower surfaces of the punch main body and the tearing knife main body are planes, and the lower surface of the transition connecting section is a smooth and continuous arc surface.

Further, the lower surface of the transition connecting section is an elliptic cylindrical surface.

Further, the slope of the lower surface of the transition connecting section is gradually gentle from the end close to the punch main body to the end close to the tearing knife main body.

The utility model discloses a second purpose protects a tear subassembly for shield cover production, including foretell tear the punching pin and with tear punching pin complex lower mould cutter, the upper surface that tears the punching pin supports and presses in one side of lower mould cutter to this constitutes shear structure.

Compared with the prior art, the utility model discloses following technical advantage has:

1) the thin strip continuous material process in the prior art is replaced by the tearing process through the tearing punch and the tearing assembly in the technical scheme, the generation of a large blanking area is avoided, the thin and narrow tearing area obtained by the tearing punch and the tearing assembly in the technical scheme replaces the existing blanking area, the width of the tearing area is only the thickness of the tearing knife main body and is in the level below 1mm, the distance between adjacent shielding cases is obviously reduced, the waste of raw materials is basically avoided, and the product basically has no waste material.

2) The transition connecting section of the elliptic cylindrical surface exists between the punch main body and the tearing knife main body in the technical scheme, the transition connecting section serves as a mechanical compensation area and can be matched with a lower die cutter to realize high-speed continuous shearing and tearing force, meanwhile, the edge of the tearing area is smooth, no bending and no miscellaneous edges exist, and the transition connecting section can be suitable for most of production processes of the stretching shielding parts.

Drawings

FIG. 1 is a schematic view of a tear assembly for shielding cage production according to the present disclosure;

fig. 2 is a schematic structural diagram of a shielding case production tape in the present technical solution;

fig. 3 is a schematic structural diagram of a production tape for a shielding case in the prior art.

In the figure: 1. the punching device comprises a punch main body, 2 a tearing knife main body, 3 a transition connecting section, 4 a punch knife edge, 5 a lower die cutter, 6 a shielding case, 7 a tearing area and 8 a pre-blanking area.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Examples

The first purpose in this embodiment is to protect a tearing punch for shield production, including punch main body 1, tearing knife main body 2, refer to fig. 1, the thickness of tearing knife main body 2 is 15 ~ 35% of the thickness of punch main body 1, is equipped with transition connecting section 3 that thickness degressively between punch main body 1 and tearing knife main body 2, the tip of tearing knife main body 2 is equipped with punch edge 4, punch main body 1, tearing knife main body 2, transition connecting section 3, punch edge 4 are the integrated into one piece structure.

In specific implementation, the knife edge angle of the punch knife edge 4 is 15-25 degrees, and the knife edge preferred angle of the punch knife edge 4 is 20 degrees. Can be matched with the lower die cutter 5 to realize the optimal tearing process. The length L of the tearing knife main body 2 is larger than the thickness of the shielding case by 0.15-0.45 mm. The length L of the tearing knife main body 2 is preferably larger than the thickness of the shielding case by 0.3mm, so that the cutting is fully completed in the cutting process, and the adaptability is strong.

The punch main body 1, the transition connecting section 3 and the upper surface of the tearing knife main body 2 are connected in sequence in a coplanar manner. The lower surfaces of the punch main body 1 and the tearing knife main body 2 are planes, the lower surface of the transition connecting section 3 is a smooth and continuous arc surface, and the lower surface of the transition connecting section 3 is an elliptic cylindrical surface. The slope of the lower surface of the transition connecting section 3 is gradually gentle from the end close to the punch main body 1 to the end close to the tearing knife main body 2. The mechanical compensation area designed by the method can be matched with the lower die cutter 5 to realize high-speed continuous shearing tearing force, and meanwhile, the edge of the tearing area is smooth without bending and miscellaneous edges, so that the mechanical compensation area can be suitable for most of the production processes of the stretching shielding parts.

The tearing assembly produced by the shielding case in the embodiment comprises the tearing punch and the lower die cutter 5 matched with the tearing punch, wherein the upper surface of the tearing punch is pressed against one side of the lower die cutter 5, so that a shearing structure is formed. The thin belt continuous material process in the prior art is replaced by the tearing process through the tearing assembly, the generation of a large blanking area 8 is avoided, the existing blanking area 8 is replaced by the thin and narrow tearing area 7 obtained through the tearing punch and the tearing assembly in the technical scheme, the width of the tearing area 7 is only the thickness of the tearing knife main body 2, the distance between the adjacent shielding cases 6 is obviously reduced at the level below 1mm, the waste of raw materials is basically avoided, and the product is basically a waste-free stamping die. When the materials are selected specifically, the lower die cutter 5, the integrated punch main body 1, the transition connecting section 3 and the tearing cutter main body 2 are made of steel materials, silicon carbide and other materials with high rigidity and high hardness.

The embodiments described above are intended to facilitate the understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention according to the disclosure of the present invention.

Claims

1. The utility model provides a tear punching pin for shield cover production, its characterized in that, includes punching pin main part (1), tears sword main part (2), the thickness that tears sword main part (2) is 15 ~ 35% of the thickness of punching pin main part (1), be equipped with between punching pin main part (1) and the sword main part of tearing (2) transition connection section (3) that thickness degressive, the tip that tears sword main part (2) is equipped with the punching pin edge of a knife (4), punching pin main part (1), tear sword main part (2), transition connection section (3), punching pin edge of a knife (4) are the integrated into one piece structure.

2. A tearing punch for shielding cage production according to claim 1, characterized in that the punch edge (4) has an edge angle of 15 ° to 25 °.

3. A tear punch for shield can production according to claim 2, characterized in that the punch edge (4) has an edge angle of 20 °.

4. The tearing punch for producing the shielding case as claimed in claim 1, wherein the length L of the tearing knife body (2) is 0.15-0.45 mm greater than the thickness of the shielding case.

5. A tearing punch for shielding cage production according to claim 4, characterized in that the length L of the tearing knife body (2) is greater than the shielding cage thickness by 0.3 mm.

6. The tearing punch for producing the shielding case as claimed in claim 1, wherein the upper surfaces of the punch main body (1), the transition connecting section (3) and the tearing knife main body (2) are connected in sequence in a coplanar manner.

7. The tearing punch for shielding can production according to claim 6, wherein the lower surfaces of the punch body (1) and the tearing knife body (2) are flat surfaces, and the lower surface of the transition connecting section (3) is a smooth and continuous arc surface.

8. A tear punch for shielding cage production according to claim 7, characterized in that the lower surface of the transition connection section (3) is an elliptic cylinder.

9. The tearing punch for shielding can production according to claim 8, wherein the lower surface of the transition connecting section (3) has a gradual slope from the end close to the punch body (1) to the end close to the tearing knife body (2).

10. A tearing assembly for the production of shielding cages, characterised in that it comprises a tearing punch according to any one of claims 1 to 9 and a lower die cutter (5) cooperating with the tearing punch, the upper surface of the tearing punch being pressed against one side of the lower die cutter (5) so as to constitute a shearing structure.