CN109226802B

CN109226802B - Method for opening holes in plate and application

Info

Publication number: CN109226802B
Application number: CN201811205509.4A
Authority: CN
Inventors: 谭升刚; 陈庆彬; 杜秋文; 余武新
Original assignee: Guangdong Evenwin Precision Technology Co Ltd
Current assignee: Guangdong Evenwin Precision Technology Co Ltd
Priority date: 2018-10-15
Filing date: 2018-10-15
Publication date: 2020-08-04
Anticipated expiration: 2038-10-15
Also published as: CN109226802A

Abstract

The invention relates to a hole opening method of a plate, which comprises the following steps: providing a plate to be perforated, wherein the plate to be perforated is provided with a preset perforated part, and the preset perforated part is provided with a first surface and a second surface opposite to the first surface. And providing a plastic cushion block, wherein the plastic cushion block is provided with a binding surface, so that the plastic cushion block is laminated with the preset opening part. And perforating the plate to be perforated from the first surface of the preset perforated part by using the drilling part, so that the drilling part sequentially passes through the first surface, the second surface and the joint surface of the plastic cushion block to form a through hole on the preset perforated part. The plate burrs processed by the hole opening method of the plate are short, some burrs do not exist, the process requirement is met, the burrs are removed without using dry ice in the follow-up process, the hole opening process of the plate can be simplified, and the production efficiency and the product yield are improved.

Description

Method for opening holes in plate and application

Technical Field

The invention relates to the field of plate processing, in particular to a plate perforating method and application.

Background

In order to increase the screen occupation ratio of the screen of a mobile electronic device such as a mobile phone, an earphone hole with a smaller aperture is generally adopted, and an earphone part is arranged at the most edge of the top of the mobile phone. The traditional trompil mode that utilizes the drilling piece directly to drill the plate can lead to through-hole bottom edge to leave longer deckle edge, consequently, still need repeat to use dry ice to get rid of deckle edge's process many times, and because the earphone aperture is less leads to dry ice to block up downthehole at the earphone easily, still can influence the yield of product.

Disclosure of Invention

Therefore, the plate perforating method is provided for improving the burr length of the perforating part and simplifying the perforating process.

In addition, the application of the hole opening method of the plate is also provided.

A method for opening a hole in a plate, comprising the steps of:

providing a plate to be perforated, wherein the plate to be perforated is provided with a preset perforated part, and the preset perforated part is provided with a first surface and a second surface opposite to the first surface;

providing a plastic cushion block, wherein the plastic cushion block is provided with a binding surface, the plastic cushion block and the preset opening part are laminated, and the binding surface is tightly bound with the second surface of the preset opening part; and

and perforating the plate to be perforated from the first surface of the preset perforated part by using a drilling piece, so that the drilling piece sequentially passes through the first surface, the second surface and the joint surface of the plastic cushion block, and a through hole is formed in the preset perforated part.

Due to the hole opening method of the plate, the plastic cushion block is filled at one side of the second surface of the preset hole opening part, so that the binding surface of the plastic cushion block and the second surface of the preset hole opening part are closely adhered into a whole, and burrs which inevitably appear at the bottom edge of the through hole by using the traditional hole opening method are transferred into the plastic cushion block which is integrated with the preset hole opening part. The plate machined by the method has short burrs, and some burrs are even not generated, so that the process requirement is met, and the subsequent burr removal by using dry ice is not needed, so that the hole opening process of the plate can be simplified.

In one embodiment, the step of laminating the plastic cushion block and the predetermined opening portion and tightly attaching the attaching surface to the second surface of the predetermined opening portion includes:

providing a fixed seat, wherein the fixed seat is provided with an accommodating groove;

placing the plastic cushion block in the accommodating groove;

and installing the plate to be perforated on the fixed seat, and enabling the second surface of the preset perforated part to be tightly attached to the attaching surface.

In one embodiment, when the plastic cushion block is placed in the accommodating groove, the plane of the notch of the accommodating groove is flush with the abutting surface of the plastic cushion block.

In one embodiment, the material of the predetermined opening portion is plastic.

In one embodiment, the difference between the surface roughness of the second surface of the preset opening part and the surface roughness of the joint surface of the plastic cushion block is less than or equal to 0.2 μm.

In one embodiment, the aperture of the through hole is less than 0.5 mm.

In one embodiment, the plastic cushion block is made of PBT or PC.

In one embodiment, the drilling member is a drill, and the feed rate of the drilling member is 300 mm/min-400 mm/min.

The hole opening method of the plate is applied to manufacturing a middle frame, a rear cover or a bottom plate of mobile electronic equipment.

Drawings

FIG. 1 is a flow chart of a method of opening a hole in a plate according to one embodiment;

FIG. 2 is a schematic diagram of a plate member according to one embodiment;

FIG. 3 is an enlarged view of a portion I of FIG. 2;

FIG. 4 is a schematic view of an embodiment of a plastic spacer;

FIG. 5 is a schematic structural view of a fixing base according to an embodiment;

FIG. 6 is a schematic view of an embodiment of a plastic spacer mounted in a receiving groove;

FIG. 7 is an enlarged view of a portion J of FIG. 6;

figure 8 is an assembly view of one embodiment of installing a panel to be apertured.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

As shown in fig. 1, the method for opening a hole in a plate member of an embodiment includes the steps of:

step S110: providing a plate to be perforated.

As shown in fig. 2 to 3, the plate 10 to be perforated has a predetermined perforated portion 12, and the predetermined perforated portion 12 has a first surface 12a and a second surface (not shown) opposite to the first surface.

Step S120: and providing a plastic cushion block, wherein the plastic cushion block is provided with a binding surface, and the plastic cushion block and the preset opening part are stacked, so that the binding surface is tightly bound with the second surface of the preset opening part 12.

As shown in fig. 4, wherein the plastic spacer 20 has an abutment surface 20 a.

Further, in one embodiment, the step of laminating the plastic pad to the predetermined opening portion such that the attaching surface is closely attached to the second surface of the predetermined opening portion 12 includes:

step S122: a fixing base is provided.

As shown in fig. 5, the fixing base 30 has a receiving groove 32.

Step S124: and placing the plastic cushion block in the accommodating groove.

As shown in fig. 6 to 7, the plastic pad 20 is received in the receiving slot 32 of the fixing base 30.

Step S126: and installing the plate to be perforated on the fixed seat, and enabling the second surface of the preset perforated part to be tightly attached to the attaching surface.

As shown in FIGS. 6-8, in one embodiment, the plastic cushion 20 is placed in the receiving groove 32 of the fixing base 30, and the plane of the notch of the receiving groove 32 is flush with the attachment surface 20a of the plastic cushion. The plate 10 to be perforated is mounted on the fixing base 30 by the fixing frame 40 and the fixing cover 50, and the second surface (not shown) of the preset perforated portion 12 is closely attached to the attaching surface 20a of the plastic spacer 20.

Step S130: and perforating the plate to be perforated from the first surface of the preset perforated part by using the drilling part, so that the drilling part sequentially passes through the first surface, the second surface and the joint surface of the plastic cushion block to form a through hole on the preset perforated part.

In one embodiment, the material of the predetermined opening portion 12 is plastic.

In one embodiment, the difference between the surface roughness (Ra) of the second surface (not shown) of the predetermined opening portion 12 and the surface roughness (Ra) of the abutting surface 20a of the plastic spacer 20 is less than or equal to 0.2 μm.

It is understood that the difference between the surface roughness (Ra) of the second surface (not shown) of the predetermined opening portion 12 and the bonding surface 20a of the plastic spacer 20 is not limited to 0.2 μm, as long as the second surface (not shown) and the bonding surface 20a can be tightly bonded.

In one embodiment, the aperture of the through hole (not shown) formed in the pre-perforated portion 12 is less than 0.5 mm.

The hole opening method is applied to plates with smaller hole diameters, and is particularly suitable for plates with preset hole diameters below 0.4 mm.

In one embodiment, the plastic spacer 20 is made of PBT or PC.

It is understood that the plastic pad 20 is a disposable material as an auxiliary material for opening the plate 10, and is not limited to PBT or PC materials. The plastic cushion block 20 can be made of PA46, PA66 and other materials only by using the surface roughness and the hardness of the plastic cushion block to meet certain requirements.

In one embodiment, the drilling member (not shown) is a drill, and the feeding amount of the drilling member (not shown) is 300 mm/min-400 mm/min.

It can be understood that with this amount of feed, the quality of the opening can be ensured, effectively protecting the walls of the through holes (not shown). Particularly, when the feed amount of 400mm/min is selected, the hole opening quality is better.

In one embodiment, the above method for opening a hole in a plate is applied to manufacturing a middle frame, a rear cover or a bottom plate of a mobile electronic device.

It is to be understood that the processed plate member that is punched by the above-mentioned punching method is not limited to the middle frame, the rear cover or the bottom plate of the mobile electronic device. The method can also be applied to the manufacture of other plate parts needing to be provided with smaller apertures.

The method for punching the plate is used for punching 50 plates to be punched, punching is carried out on the other 10 plates to be punched by using the traditional punching method, measuring and counting are carried out on burrs at the punching positions of the plates to be punched by using a 2.5-time projector, and the counting results are shown in the following table.

TABLE 1 statistics of burr length at open hole site of plate

As can be seen from the above table, the average burr length of the hole-opening part of the plate with the hole-opening by using the scheme of the invention is 0.0038mm, and some burrs are even not present; the average burr length of the hole-opening part of the plate which is opened by using the traditional method is 0.08mm, and the difference between the burr length and the hole-opening part is at least one order of magnitude.

In summary, the above-mentioned method for opening holes in a plate has at least the following advantages:

(1) according to the plate opening method, the plastic cushion block is filled at one side of the second surface of the preset opening part, the binding surface of the plastic cushion block and the second surface of the preset opening part are tightly adhered to form a whole, so that burrs at the bottom edge of the through hole are necessarily transferred to the plastic cushion block integrated with the preset opening part by using the traditional opening method, and the plate burrs formed by using the method are short, and some burrs are even absent.

(2) Because the plate burrs processed by the method meet the process requirements, the burrs are removed without using dry ice in the subsequent process, the hole opening process of the plate can be simplified, and the production efficiency and the product yield are improved.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A method of opening a hole in a panel, comprising the steps of:

providing a plate to be perforated, wherein the plate to be perforated is provided with a preset perforated part, the preset perforated part is provided with a first surface and a second surface opposite to the first surface, and the preset perforated part is made of plastic;

providing a plastic cushion block, wherein the plastic cushion block is provided with a binding surface, the plastic cushion block and the preset opening part are laminated, so that the binding surface is tightly bound with the second surface of the preset opening part, and the difference between the surface roughness of the second surface of the preset opening part and the surface roughness of the binding surface of the plastic cushion block is less than 0.2 mu m; and

using a drilling piece to drill the plate to be drilled from the first surface of the preset drilling part, so that the drilling piece sequentially penetrates through the first surface, the second surface and the joint surface of the plastic cushion block, and a through hole is formed in the preset drilling part; the aperture of the through hole is less than 0.5 mm.

2. The method of claim 1, wherein said step of laminating said plastic spacer to said predetermined opening portion and said abutting surface to said second surface of said predetermined opening portion comprises:

placing the plastic cushion block in the accommodating groove;

3. The method of claim 2, wherein when the plastic cushion block is placed in the receiving groove, a plane of a notch of the receiving groove is flush with the abutting surface of the plastic cushion block.

4. The method of claim 1, wherein the plastic spacer is made of PBT or PC.

5. The method of opening a hole in a plate member according to claim 4, wherein the drilling member is a drill, and the drilling member has a feed rate of 300mm/min to 400 mm/min.

6. Use of the method for opening a hole in a plate according to any one of claims 1 to 5 for manufacturing a middle frame, a rear cover or a bottom plate of a mobile electronic device.