CN113600657B

CN113600657B - Sharp corner forming process at rotating shaft of notebook computer shell

Info

Publication number: CN113600657B
Application number: CN202110812443.0A
Authority: CN
Inventors: 孙华军
Original assignee: Suzhou Chunqiu Electronic Technology Co ltd
Current assignee: Hefei Jingshen Precision Technology Co ltd
Priority date: 2021-07-19
Filing date: 2021-07-19
Publication date: 2023-05-02
Anticipated expiration: 2041-07-19
Also published as: CN113600657A

Abstract

The invention belongs to the technical field of metal stamping processing, and relates to a process for forming sharp corners at a rotating shaft of a notebook computer shell, which comprises the following steps: 50-52 DEG ox horn bending, 70-72 DEG ox horn bending, 90 DEG right angle bending, 100 DEG bending and 110 DEG bending. The invention can deform the material of the flat plate structure into a sharp angle-shaped rotating shaft structure with two side walls through five steps, thereby meeting the structural requirement and avoiding cracking.

Description

Sharp corner forming process at rotating shaft of notebook computer shell

Technical Field

The invention relates to the technical field of metal stamping processing, in particular to a sharp corner forming process at a rotating shaft of a notebook computer shell.

Background

With the competitive development of the mold industry in China, the mold consumption of the general technical level in China is relatively saturated, and a larger market space still exists for the mold product with higher technical content, so that the mold industry in China is determined to be greatly promoted and breaks through the current technical bottleneck in the aspect of high precision. In recent years, a 3C product mold mainly comprising a notebook computer is represented, and the product is not only improved in performance but also broken through in appearance in order to match with the existing 5G technology and the aesthetic of people. The enterprises face transformation period, and the technology of introducing new technology is necessary to break through the difficulty of the mould continuously, so that the new technology of meeting new products becomes impossible, and the core competitiveness of the enterprises is improved.

As shown in fig. 1, at present, there is an R0.5 sharp angle 11 at the edge of the fixed position of the rotating shaft of the notebook casing 11 with a keyboard surface, one side edge of the sharp angle 11 needs to be bent at 90 ° relative to the board surface, and the other side edge needs to be bent at 110 ° relative to the board surface, but the folded edges at two positions are obtained by directly stretching and deforming a piece of material which is level with the board surface. In the past, three times of bending into place are divided into 70 degrees, 90 degrees and 110 degrees, but the following problems occur:

1. because the deformation amount of the material is large, the sharp angle 11 is easy to crack;

2. the height of the rotating shaft cannot meet the product requirement;

3. the front R0.8 angle is easy to collapse and cannot be realized.

For this reason, a new forming method has been developed to solve the above-mentioned problems.

Disclosure of Invention

The invention mainly aims to provide a process for forming a sharp corner at a rotating shaft of a notebook computer shell, which can ensure the forming precision of the sharp corner at the rotating shaft on the notebook computer shell.

The invention realizes the aim through the following technical scheme: a technology for forming a sharp corner at a rotating shaft of a notebook shell comprises the following steps:

(1) making a 75-80-degree ox horn angle at the edge of the flat material, bending the two side walls by 50-52 degrees, and protruding the sharp corners by 0.28-0.30 mm;

(2) making an angle of 83-85 DEG ox horn at the edge of the material, bending the two side walls by an angle of 70-72 DEG, and protruding the sharp corners by 0.20-0.22 mm;

(3) the edges of the material are made to be 90 degrees, and the two side walls are formed to be 90 degrees;

(4) one side wall of the material is made into a 100-degree angle, the other side wall is kept at 90 degrees, and the transition positions of the two side walls are made into an arc shape;

(5) the 100-degree angle is changed into 110-degree angle, the other side wall is kept at 90 degrees, and the transition positions of the two side walls are sharp angles.

Specifically, R2.8-3.0 fillets are arranged outside sharp corners in the step (1).

Furthermore, R1.5-1.6 round corners are arranged outside the sharp corners in the step (2).

Furthermore, R0.8-1.0 round angle is formed outside the sharp angle in the step (3).

Furthermore, R0.7-0.8 round angle is formed outside the sharp angle in the step (4).

Furthermore, R0.5 fillets are formed outside sharp corners in the step (5).

The technical scheme of the invention has the beneficial effects that:

the invention can deform the material of the flat plate structure into a sharp angle-shaped rotating shaft structure with two side walls through five steps, thereby meeting the structural requirement and avoiding cracking.

Drawings

FIG. 1 is a perspective view of a notebook housing;

FIG. 2 is a top view of a first corner forming block;

FIG. 3 is a top view of a second corner forming block;

FIG. 4 is a perspective view of a third corner forming block;

FIG. 5 is a perspective view of a fourth corner forming block;

fig. 6 is a perspective view of a fifth corner forming block.

The figures represent the numbers:

1-a notebook shell and 11-a sharp corner;

2-first corner forming blocks, 21-first ox horn portions;

3-second corner forming blocks, 31-second ox horn;

4-a third corner forming block, and forming an angle of 41-90 degrees;

5-fourth corner forming blocks, 51-first sharp corners, 52-arc-shaped parts;

6-fifth corner forming block, 61-second sharp corner.

Detailed Description

The present invention will be described in further detail with reference to specific examples.

Examples:

as shown in fig. 1 to 6, the process for forming the sharp angle at the rotating shaft of the notebook casing according to the present invention includes the following steps:

(1) and (3) making a 75-80-degree ox horn angle at the edge of the flat material, wherein the bending angles of the two side walls are 50-52 degrees, and the protruding angle is 0.28-0.30 mm. The angle of the corners of the edges of the material is punched from the first corners 21 of the first corner forming block 2, which allows the material at the corners to be pulled more, leaving enough material for the corners to be deformed into corners later on to avoid breaking.

(2) And (3) making an ox horn angle of 83-85 degrees at the edge of the material, bending the two side walls by an angle of 70-72 degrees, and protruding the sharp corners by 0.20-0.22 mm. Here the bending angle is further enlarged and the angle of the bullnose of the edge of the material is punched from the second bullnose 31 on the second corner forming block 3, which structure further increases the material in the pointed position.

(3) The edges of the material were made 90 deg., and the two sidewalls were formed at an angle of 90 deg.. The structure is formed by a third corner forming block 4, the third corner forming block 4 having an angle of 90 °, the edges of the material forming a three-sided structure at an angle of 90 ° to each other after stamping.

(4) One side wall of the material is made into a 100-degree angle, the other side wall is kept at 90 degrees, and the transition positions of the two side walls are made into an arc shape. The structure is formed by a fourth corner forming block 5, the fourth corner forming block 5 having a first sharp corner 51 which enlarges one sidewall angle to 100 °. In order to prevent tearing at sharp corners of the material, the fourth corner forming block 5 also has an arcuate portion 52 to arcuate the transition of the two side walls.

(5) The 100-degree angle is changed into 110-degree angle, the other side wall is kept at 90 degrees, and the transition positions of the two side walls are sharp angles. The structure is formed by a fifth corner forming block 5, the fifth corner forming block 5 has a second sharp corner 52 which enlarges the 100 DEG angle to 110 DEG, and forms the sharp corner 11 structure of the final notebook housing 1.

R2.8-3.0 round corners are arranged outside the sharp corners in the step (1), R1.5-1.6 round corners are arranged outside the sharp corners in the step (2), R0.8-1.0 round corners are arranged outside the sharp corners in the step (3), R0.7-0.8 round corners are arranged outside the sharp corners in the step (4), and R0.5 round corners are arranged outside the sharp corners in the step (5). The turning part of the material is the position which is most easily broken, and in order to control the stretching amount of the material in each step, the radius of the round angle is controlled in a proper range and gradually reduced, and finally, the target R0.5 round angle can be achieved.

What has been described above is merely some embodiments of the present invention. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit of the invention.

Claims

1. A technology for forming sharp corners at a rotating shaft of a notebook shell is characterized by comprising the following steps:

2. The process for forming the sharp angle at the rotating shaft of the notebook shell according to claim 1, wherein the process comprises the following steps of: r2.8-3.0 fillets are arranged outside the sharp corners in the step (1).

3. The process for forming the sharp angle at the rotating shaft of the notebook shell according to claim 2, wherein the process comprises the following steps of: r1.5-1.6 round corners are arranged outside the sharp corners in the step (2).

4. A process for forming a sharp corner at a rotating shaft of a notebook casing according to claim 3, wherein the process comprises the following steps: r0.8-1.0 round angle is formed outside the sharp angle in the step (3).

5. The process for forming the sharp angle at the rotating shaft of the notebook shell according to claim 4, wherein the process comprises the following steps of: r0.7-0.8 round angle is formed outside the sharp angle in the step (4).