CN111604415A

CN111604415A - Manufacturing method of shielding case bracket

Info

Publication number: CN111604415A
Application number: CN202010495912.6A
Authority: CN
Inventors: 罗振宇; 曾凡杰
Original assignee: Shanghai Chuanggong Telecom Technology Co Ltd
Current assignee: Shanghai Chuanggong Telecom Technology Co Ltd
Priority date: 2020-06-03
Filing date: 2020-06-03
Publication date: 2020-09-01

Abstract

The invention discloses a manufacturing method of a shielding case bracket, which comprises the following steps: s10, cutting a circle of groove around the edge of the patch surface of the shield cover bracket, wherein the bottom of the groove is provided with a lower peak; and S20, blanking by taking the groove as a contour line. Because the edge of the surface-mounted part is additionally provided with the groove, when the upper die punch downwards punches the raw material of the shield cover bracket, the lower vertex of the raw material of the shield cover bracket is directly broken and separated as a tearing point, so that the problem of burrs caused by deformation, dislocation and re-breakage is avoided. The scheme eliminates burrs on the surface mounted on the flange edge, and avoids functional failure caused by the burrs piercing PCB wiring; the procedures of electrolytic or chemical treatment and the like for removing burrs at the later stage of manufacturing the shielding case bracket are saved; in addition, the problem of burrs cannot be caused even if the die is worn in the later period, and the service life of the die is prolonged.

Description

Manufacturing method of shielding case bracket

Technical Field

The invention relates to the field of intelligent communication equipment manufacturing, in particular to a manufacturing method of a shielding case bracket.

Background

At present, in order to ensure that signals and functions of each module are independent from each other and are not interfered by other modules, shielding measures are adopted in the design process of communication products, and shielding by adopting a shielding case is the most common method. The shields are usually two-piece, one piece being a frame (frame) for the patch; the other piece is a cover (cover) located over the bracket for mating with the bracket. Wherein, the support adopts tensile form, and the lid adopts the technology of buckling, and the shield cover of this kind of form can be reprocessed, and the leakproofness is good.

To the manufacturing process of shield cover support, the periphery of support upside has the flange limit, and the one side that is used for the laminating above the flange limit is the paster face, because the flange limit is narrower, if reverse blanking, go up inside the mould unloading punching pin and need do the processing of keeping away a position, punching pin marginal structure weakens for punching pin edge is fragile, causes the product to expect more. Therefore, only positive blanking can be adopted to fully ensure the strength of the upper die punch.

After the shielding case bracket is punched and falls, burrs can be generated on the flange edge. The burr is generated because the material undergoes elastic and plastic deformation before entering the fracture separation stage. When the blade is put into the material, cracks are generated on the material near the cutting edges of the male die and the female die, the upper cracks and the lower cracks are continuously expanded into the material along with the increase of the input amount of the blade, and when the gap between the cutting edges is reasonably set, the upper cracks and the lower cracks are overlapped, and the plate is normally broken and separated; when the gap of the cutting edge is unreasonable, the upper crack and the lower crack are not coincident, and then stamping burrs can be generated. The blanking gap is therefore a direct cause of the problem of the punch burr. And along with the wearing and tearing of the production process master die, the blade becomes blunt, and the clearance grow gradually, and the burr also can grow gradually.

Because the shield cover support can only adopt forward blanking for the direction that produces the burr makes progress, promptly, opposite with blanking direction, along with the increase of mould blanking number of times, the burr can the grow, and behind paster face paster, the burr behind the grow has the top to hinder the risk that PCB walked the line.

Disclosure of Invention

The invention aims to overcome the defect that a PCB wiring layer is damaged by jacking due to upward burrs easily generated on a flange edge of a shielding case support in the prior art, and provides a manufacturing method of the shielding case support.

A manufacturing method of a shield cover bracket is characterized by comprising the following steps: s10, cutting a circle of groove around the edge of the patch surface of the shield cover bracket, wherein the bottom of the groove is provided with a lower peak; and S20, blanking by taking the groove as a contour line.

In this scheme, owing to increased the recess at the edge of paster face, when last plunger down the raw and other materials of blanking shield cover support, shield cover support raw and other materials can not be through from elastic deformation to plastic deformation to this three stage of fracture separation again, but following summit is the direct fracture separation of tearing point to avoid because the burr problem that the dislocation of being out of shape fracture leads to again, even wearing and tearing appear in the mould later stage, the burr also can not appear in the paster face of shield cover support. The scheme can eliminate burrs on the surface mounted on the flange edge, and avoid the problem that the burrs pierce the PCB wiring to cause functional failure; the procedures of electrolytic or chemical treatment and the like for removing burrs at the later stage of manufacturing the shielding case bracket are saved, the cost is reduced, and the environment is protected; in addition, the problem of burrs cannot be caused even if the die is worn in the later period, and the service life of the die is prolonged.

Preferably, in step S20, the lower vertex is aligned with the lower die blade in the blanking direction.

Preferably, both sides of the groove have an outer apex and an inner apex, respectively, and in step S20, the inner wall of the upper die blade is aligned with or beyond the outer apex in the blanking direction, and the outer wall of the upper die punch does not exceed the inner apex in the blanking direction.

In the scheme, the inner wall of the upper die knife edge is aligned with or exceeds the outer vertex in the blanking direction, and the outer wall of the upper die punch does not exceed the inner vertex in the blanking direction, so that the blanking effect is better.

Preferably, in step S20, the outer wall of the upper punch does not exceed the lower apex in the vertical direction.

In this scheme, go up the outer wall of mould punching pin and set up to no longer than lower summit in vertical direction, avoided last mould punching pin to cross lower summit at blanking in-process to avoid changing the position of predetermined breaking point.

Preferably, before step S10, the method further includes the steps of: and S11, bending the raw material to form a flange edge of the shield cover bracket.

In this embodiment, step S10 is disposed after the bending step, which is beneficial to forming a groove on the edge of the surface of the patch.

Preferably, before S11, the method further comprises the following steps: and S12, drawing the raw material downwards to form the shell of the shield cover bracket.

Preferably, the groove is a V-cut groove.

In the scheme, the V-cut groove is a V-shaped groove and is provided with a lower vertex, so that the lower vertex can be directly broken and separated by taking the lower vertex as a tearing point during blanking, and the V-cut groove is easy to manufacture, low in processing cost and high in processing efficiency.

Preferably, the V-cut groove is formed by cutting and processing a V-cut knife.

On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.

The positive progress effects of the invention are as follows:

for the manufacturing method of the shielding case support, the groove is additionally arranged at the edge of the surface to be pasted, when the upper punch punches the raw material of the shielding case support downwards, the raw material of the shielding case support cannot pass through three stages of elastic deformation, plastic deformation and fracture separation, and the lower vertex is the tearing point to be directly fractured and separated, so that the problem of burrs caused by deformation, dislocation and fracture is avoided, and even if the die is worn at the later stage, burrs cannot occur on the surface to be pasted of the shielding case support. The scheme can eliminate burrs on the surface mounted on the flange edge, and avoid the problem that the burrs pierce the PCB wiring to cause functional failure; the procedures of electrolytic or chemical treatment and the like for removing burrs at the later stage of manufacturing the shielding case bracket are saved, the cost is reduced, and the environment is protected; in addition, the problem of burrs cannot be caused even if the die is worn in the later period, and the service life of the die is prolonged.

Drawings

Fig. 1 is a flow chart of a method of manufacturing a shield support according to a preferred embodiment of the present invention.

Fig. 2 is a front view of the patch side according to a preferred embodiment of the present invention.

Fig. 3 is a schematic diagram of the positional relationship between the shield support and the mold according to the preferred embodiment of the present invention.

Fig. 4 is a partially enlarged view of a shield support and mold according to a preferred embodiment of the present invention.

Description of reference numerals:

shield can holder 1

Raw material 4

Paster surface 11

Flange 12

Groove 13

Housing 14

Upper die edge 21

Upper punch 22

Lower die blade 31

Lower vertex 131

Inner vertex 132

Outer vertex 133

Break line 134

Blanking direction A

Detailed Description

The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.

In this embodiment, a method for manufacturing a shield support 1 is disclosed, as shown in fig. 1 to 4, the method for manufacturing the shield support 1 includes the steps of: s10, cutting a circle of groove 13 around the edge of the patch surface 11 of the shield cover bracket 1, wherein the bottom of the groove 13 is provided with a lower peak 131; and S20, punching by taking the groove 13 as a contour line.

In this embodiment, because the recess 13 has been increased at the edge of paster face 11, when last mould punch 22 down the blanking raw and other materials 4 of shield cover support 1, the raw and other materials 4 of shield cover support 1 can not be through from elastic deformation to plastic deformation to this three stage of fracture separation again, but following summit 131 is the direct fracture separation of tearing point to avoid because the burr problem that the dislocation of deformation resultantly fracture leads to, even the mould later stage appears wearing and tearing, the paster face 11 of shield cover support 1 also can not appear the burr. The embodiment can eliminate the burrs on the patch surface 11 of the flange edge 12, and avoid the problem of functional failure caused by the burrs piercing the PCB wiring; the procedures of electrolytic or chemical treatment and the like for removing burrs at the later stage of manufacturing the shielding case bracket 1 are saved, the cost is reduced, and the environment is protected; in addition, the problem of burrs cannot be caused even if the die is worn in the later period, and the service life of the die is prolonged.

In addition, during punching, the upper die blade 21 and the lower die blade 31 are fixed and press the raw material 4 on the periphery of the flange 12, and the upper die punch 22 punches downward, so that the shield shell holder 1 falls down. The break line 134 is marked in fig. 4.

As shown in fig. 3 and 4, in step S20, lower vertex 131 is aligned with lower die blade 31 in the blanking direction. The arrangement enables the blanking effect to be better.

As shown in fig. 3 and 4, the groove 13 has an outer vertex 133 and an inner vertex 132 on both sides thereof, respectively, and in step S20, the inner wall of the upper die blade 21 is aligned with the outer vertex 133 or exceeds the outer vertex 133 in the blanking direction a, and the outer wall of the upper punch 22 does not exceed the inner vertex 132 in the blanking direction a. Wherein the inner wall of the upper die blade 21 is aligned with the outer vertex 133 or exceeds the outer vertex 133 in the blanking direction, that is, the annular inner wall of the upper die blade 21 is located inside the ring structure formed by the outer vertex 133; the outer wall of the upper punch 22 does not exceed the inner vertex 132 in the blanking direction, that is, the annular outer wall of the upper punch 22 is located outside the annular structure formed by the inner vertex, and the blanking effect is better by adopting the above arrangement.

As shown in fig. 3 and 4, in step S20, the outer wall of the upper punch 22 does not exceed the lower apex 131 in the vertical direction. Wherein, the outer wall of the upper punch 22 is set not to exceed the lower vertex 131 in the vertical direction, that is, the annular outer wall of the upper punch 22 is located inside the ring structure formed by the lower vertex, so that the upper punch 22 is prevented from crossing the lower vertex 131 in the blanking process, and the position of the preset breaking point is prevented from being changed.

Before step S10, the method further includes the steps of: s11, bending the raw material 4 to form the flange 12 of the shield support 1. Wherein, this step adopts the bender to bend raw and other materials 4. Before S11, the method further includes the steps of: s12, the raw material 4 is drawn downward to form the housing 14 of the shield case holder 1. Step S10 is performed after the stretching and bending step, where the patch face 11 is already flat, which is advantageous for forming the groove 13 at the edge of the patch face 11. It should be noted that a leveling step is further included between step S10 and step S20.

Specifically, as shown in fig. 4, the groove 13 is a V-cut groove, the V-cut groove is a V-shaped groove, and the V-cut groove has a lower vertex 131, so that the lower vertex 131 can be directly broken and separated as a tearing point in a blanking process, and the V-cut groove is easy to manufacture, low in processing cost and high in processing efficiency. The V-cut groove is formed by cutting and processing a V-cut knife. It should be noted that the V-CUT knife, which is a knife in the electronic industry, is also called a V-CUT micro-carving knife, also called a V-pit knife or a V-groove knife for a PCB board, and is mainly used as a hard alloy knife for VCUT operation on a multi-component circuit board on a PCB board V-CUT machine.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "vertical", "top", "bottom", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore, should not be construed as limiting the present invention unless otherwise specified herein.

While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.

Claims

1. A manufacturing method of a shield support is characterized by comprising the following steps:

s10, cutting a circle of groove around the edge of the patch surface of the shield cover bracket, wherein the bottom of the groove is provided with a lower peak;

and S20, blanking by taking the groove as a contour line.

2. The method of manufacturing a shield bracket according to claim 1, wherein in step S20, the lower vertex is aligned with the lower die blade in the blanking direction.

3. The method of manufacturing a shield can bracket of claim 1, wherein both sides of the groove have an outer vertex and an inner vertex, respectively, and in step S20, an inner wall of the upper die blade is aligned with or exceeds the outer vertex in a blanking direction, and an outer wall of the upper die punch does not exceed the inner vertex in the blanking direction.

4. The method of manufacturing a shield bracket according to claim 1, wherein in step S20, the outer wall of the upper punch does not exceed the lower vertex in the vertical direction.

5. The method for manufacturing a shield support according to claim 1, further comprising, before step S10, the steps of:

and S11, bending the raw material to form the flange edge of the shield cover bracket.

6. The method of manufacturing a shield bracket according to claim 5, further comprising, before S11, the steps of:

and S12, drawing the raw material downwards to form the shell of the shield cover bracket.

7. The method for manufacturing the shield case bracket according to claim 1, wherein the groove is a V-cut groove.

8. The method for manufacturing the shield case bracket according to claim 7, wherein the V-cut groove is cut by a V-cut knife.