WO2018001071A1

WO2018001071A1 - Method of forming through hole in metal member, electronic apparatus housing, and electronic apparatus

Info

Publication number: WO2018001071A1
Application number: PCT/CN2017/087798
Authority: WO
Inventors: 许海平; 成蛟
Original assignee: 广东欧珀移动通信有限公司
Priority date: 2016-06-27
Filing date: 2017-06-09
Publication date: 2018-01-04
Also published as: CN106078095A; CN106078095B

Abstract

A method of forming a through hole (1) in a metal member on an electronic apparatus housing. The method of forming a through hole (1) in a metal member comprises: stamping the metal member at a hole position to form a protrusion structure (8), pressing the protrusion structure (8) in the reverse direction of the stamping operation forming the protrusion structure (8), and then cutting an end portion of the protrusion structure (8) to form a through hole (1).

Description

Forming method of hardware through hole, electronic device housing and electronic device

Technical field

The present invention relates to the field of electronic device processing technology, and in particular, to a method for forming a through hole of a hardware, an electronic device housing prepared by the molding method, and an electronic device having the electronic device housing.

Background technique

At present, hardware, especially thin-walled hardware, often needs to be opened on the side. For example, the metal shell side wall of electronic devices such as smart phones and tablet computers needs to be equipped with a power button, a volume button, a SIM card tray, etc., therefore, the metal shell side The wall needs to be provided with a power button hole, a volume button hole, and a through hole such as a SIM card hole.

Summary of the invention

One of the objects of the present invention is to provide a method for forming a through hole of a hardware to solve the problem that the existing through hole processing method of the hardware causes damage to the strength of the hardware.

Another object of the present invention is to provide an electronic device housing for processing side holes by the above-described molding method.

A third object of the present invention is to provide an electronic device having the above-described electronic device housing.

To this end, the present invention employs the following technical solutions:

The forming method of the through hole of the hardware firstly extrudes a convex hull structure at the opening position of the hardware, and then presses the convex hull structure in the opposite direction of the convex hull structure extrusion, and finally cuts off the end of the convex hull structure A through hole is formed in the portion.

An electronic device housing includes a side wall having a through hole formed therein, and the through hole is formed by forming a through hole of a hardware as described above.

An electronic device comprising an electronic device housing as described above.

DRAWINGS

The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from

1 is a perspective view of a preform of a hardware according to a second embodiment of the present invention;

2 is a perspective view of a preform of a hardware provided by Embodiment 2 of the present invention;

Figure 3 is a cross-sectional view of the first embodiment of the present invention when the preform is extruded;

4 is a cross-sectional view of the hardware semi-finished product according to the second embodiment of the present invention when it is backed up;

Figure 5 is a partial enlarged view of a portion A in Figure 4;

Figure 6 is a perspective view of the hardware after being pushed back according to the second embodiment of the present invention;

Figure 7 is a cross-sectional view of the back-wrapped hardware provided by the second embodiment of the present invention;

Figure 8 is a perspective view of the hardware of the milled through hole provided by the second embodiment of the present invention;

Figure 9 is a cross-sectional view showing the hardware of the milled through hole provided in the second embodiment of the present invention.

Reference mark:

1, through hole; 2, concave mold; 3, insert; 4, hardware blank; 5, hardware semi-finished products; 6, punch; 7, concave mold; 8, convex hull structure;

21, convex; 31, groove.

detailed description

The technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only the present invention. Some embodiments, but not all of the embodiments. All other embodiments obtained by a person skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

In order to solve the problem that the existing through hole processing method of the hardware causes damage to the strength of the hardware, the present application proposes a forming method of the through hole of the hardware, the electronic device casing for processing the side hole by the forming method, and the housing of the electronic device For details of the electronic device, refer to the following embodiments.

Embodiment 1

In this embodiment, a forming method of the first through hole of the hardware is proposed. The forming method is: firstly forming a convex hull structure at the opening position of the hardware, and then pressing back in the opposite direction along the convex hull structure. The package structure finally cuts the end of the convex hull structure to form a through hole.

In the embodiment, during the through hole processing, the back extrusion processing causes the material to flow around the through hole before the through hole processing, which is equivalent to thickening the metal wall thickness around the through hole, thereby improving the strength of the through hole position hardware.

Embodiment 2

As shown in FIG. 1 to FIG. 9 , this embodiment proposes a molding method of a through hole of a second hardware, and the molding method includes the following steps:

A: For the metal sheet press processing, the preform 4 having the side wall is machined.

Step A includes the following steps:

A1: Produce sheet metal in accordance with the size of the hardware.

Further, step A1 includes the following steps:

A11: Calculate the size of the required metal sheet according to the size of the hardware;

A12: The metal plate raw material is cut out by a punching die to form a metal plate before press forming.

In the embodiment, in order to improve the wear resistance of the hardware, the metal plate is made of stainless steel sheet metal or aluminum alloy sheet metal, which has high wear resistance and long service life. In order to make the hardware thinner and lighter, the thickness of the metal plate is selected in the range of 0.4-1.2 mm.

A2: The metal sheet is integrally stretched by a press forming die to form a preform 4 having vertical side walls.

As shown in Fig. 1, the punch 6 and the die 7 of the press forming die collectively press the metal sheet to form a vertical side wall of the metal sheet.

B: Extrusion processing of the opening position of the side wall by the mold is performed to process the hardware semi-finished product 5 having the convex hull structure 8 on the side wall.

C: The convex hull structure 8 of the hardware semi-finished product 5 is subjected to back-squeezing in the opposite direction of extrusion by a mold.

As shown in FIGS. 3 and 4, the mold in the step B and the step C includes a female mold 2 and an inner insert 3, wherein the inner wall of the female mold 2 is provided with a projection 21, and the outer wall of the insert 3 is provided with a convex portion. The groove 31, the projection 21, and the groove 31 of the mating 21 match the shape of the convex hull structure 8. Here, the cross-sectional shape of the protrusion 21 and the groove 31 may be one of an elliptical shape, a square shape, or a circular shape according to the shape of the through hole 1 of the hardware.

When the mold is clamped, the insert 3 moves downward and then moves horizontally to the left. The die 2 and the insert 3 co-extrude the preform 4 in the middle, and some of the material flows toward the inside of the side wall, thereby processing the side. The wall has a hardware semi-finished product 5 with a convex hull structure 8. Since the stretching process of the convex hull structure 8 causes a change in the density of the material at the fillet 9 in FIGS. 4 and 5, the appearance of the product is affected, and at the same time, the rounded corner 9 is also large, which affects the fineness of the appearance of the product. Therefore, the convex hull structure 8 of the hardware semi-finished product 5 is subjected to back-squeezing in the opposite direction of extrusion molding, so that the material of the rounded corner 9 can be reflowed, which is equivalent to thickening the metal wall thickness around the through hole, and the material becomes denser. The fillet 9 will also be correspondingly reduced, thereby increasing the strength of the through hole position of the hardware semi-finished product 5.

D: CNC machining is performed on the end of the convex hull structure 8 of the hardware semi-finished product 5 in the step C, and the through hole 1 is milled out (see Figs. 8 and 9).

Finally, the above-mentioned hardware semi-finished product 5 can be post-processed to obtain the final hardware product.

Post-treatment includes polishing, polishing, anodizing, and protective film. For example, the hardware semi-finished product 5 is ground and polished by grinding and polishing to remove excess burrs around the button hole, and it is necessary to add water at any time during the grinding and polishing process to prevent overheating. The metal can be plated on the outer surface of the metal shell semi-finished product 5 by anodizing treatment or other surface treatment methods, so that the hardware presents a variety of metallic colors, enhances the coolness and diversity of the appearance of the hardware, and improves the hardware products. Market competitiveness, to meet the different needs of users, improve user experience. The protective film treatment method can prevent the hardware from being corroded by the external environment and further extend the service life of the hardware.

Embodiment 3

The embodiment of the present invention provides a housing for an electronic device, including a side wall, and a through hole 1 is formed in the sidewall, and the through hole 1 is processed by forming a through hole of the hardware according to the first embodiment or the second embodiment. to make. This embodiment also provides an electronic device including the electronic device housing. The electronic device may be an electronic product such as a mobile phone or a tablet computer, and the electronic device housing may be a battery cover or a casing. The through hole of the side wall includes a power hole, a volume hole, a SIM card hole, and the like, which are provided for assembling a power button, a volume button, a SIM card, and the like. The electronic device casing and the electronic device thereof of the invention have high structural strength and long service life.

The technical principles of the present invention are described in conjunction with specific embodiments. The descriptions are merely illustrative of the principles of the invention and are not to be construed as limiting the scope of the invention. Based on the explanation herein, those skilled in the art can devise various other embodiments of the present invention without departing from the scope of the invention.

Claims

A forming method of a through hole of a hardware, characterized in that firstly, a convex hull structure (8) is extruded at an opening position of the hardware, and then extruded in the opposite direction along the convex hull structure (8). The package structure (8), and finally the end of the convex hull structure (8) is cut to form a through hole (1).
The method for forming a through hole of a hardware according to claim 1, comprising the steps of:

A: stamping metal sheet, processing the preform (4) with the side wall;

B: extruding the opening position of the side wall through the mold, and processing the semi-finished hardware (5) of the side wall having the convex hull structure (8);

C: the convex hull structure (8) of the semi-finished product (5) of the hardware is back-pressed in the opposite direction of extrusion by a mold;

D: CNC machining the end of the convex hull structure (8) of the hardware semi-finished product (5) in the step C, and milling the through hole (1).
The forming method of the through hole of the hardware according to claim 2, wherein the step A comprises the following steps:

A1: Producing a metal sheet that conforms to the size of the hardware;

A2: The metal sheet is integrally stretched by a press forming die to form a preform (4) having a side wall.
The method of forming a through hole of a hardware according to claim 3, wherein the side wall is a vertical side wall.
The method of forming a through hole of a hardware according to claim 4, wherein the press forming die comprises a punch (6) and a groove (7), the punch (6) and the groove (7) Coextruding the metal sheet to form a vertical side wall of the metal sheet.
The forming method of the through hole of the hardware according to claim 3, wherein the step A1 comprises the following steps:

A11: Calculate the size of the required metal sheet according to the size of the hardware;

A12: The metal plate raw material is cut out by a punching die to form a metal plate before press forming.
The method of forming a through hole of a hardware according to claim 2, wherein the mold in the step B and the step C comprises a die (2) and an insert (3), the die (2) and The insert (3) co-extrudes the preform (4) of the hardware to form a semi-finished hardware (5) having a convex hull structure (8) on the side wall.
The forming method of the through hole of the hardware according to claim 7, wherein the inner wall of the die (2) is provided with a protrusion (21), and the outer wall of the insert (3) is provided with a protrusion (21) A mating groove (31), the protrusion (21), the groove (31) matching the shape of the convex hull structure (8).
The forming method of the through hole of the hardware according to claim 8, wherein the protrusion (21) and the groove (31) have an elliptical shape, a square shape or a circular shape.
The forming method of the through hole of the hardware according to claim 8, characterized in that the insert (3) moves first downward and then horizontally to the left, the concave die (2) and the insert (3) The metal preform (4) is co-extruded in the middle, and a portion of the material flows toward the inside of the side wall to machine the hardware semi-finished product (5) having the convex hull structure (8) on the side wall.
The forming method of the through hole of the hardware according to claim 10, characterized in that, during the stretching process of the convex hull structure (8), the convex hull structure (8) and the side wall are formed Rounded corners (9).
The forming method of the through hole of the hardware according to claim 11, wherein in the step C, the material of the rounded corner (9) is reflowed, and the wall thickness of the through hole (1) increases.
The method of forming a through hole of a hardware according to claim 2, further comprising the steps of:

E: The hardware semi-finished product (5) is polished, polished, anodized and treated with a protective film.
The method of forming a through hole of a hardware according to claim 13, wherein during the grinding and the polishing process, the burr of excess thickness dimension around the through hole (1) is ground and polished.
The method of forming a through hole of a hardware according to claim 14, wherein a water rinse is applied at any time during the grinding and the polishing to prevent overheating.
The forming method of the through hole of the hardware according to claim 13, wherein the outer surface of the metal shell semi-finished product (5) is plated with different metals by the anodizing treatment, so that the hardware presents various metals. color.
The forming method of the through hole of the hardware according to claim 2, wherein the metal plate is stainless steel sheet metal or aluminum alloy sheet metal.
An electronic device housing includes a side wall, and a through hole (1) is defined in the side wall, wherein the through hole (1) adopts the through hole of the hardware according to any one of claims 1 to 17. The molding method is processed.
The electronic device casing according to claim 18, wherein the through hole comprises a power hole, a volume hole, and a SIM card hole for assembling a power button, a volume button, a SIM card holder.
An electronic device comprising the electronic device housing of claim 18 or 19.
The electronic device according to claim 20, wherein the electronic device is a mobile phone or a tablet.
The electronic device according to claim 20, wherein the housing of the electronic device is a battery cover or a housing.