CN113600657A

CN113600657A - Sharp angle forming process at rotating shaft of notebook computer shell

Info

Publication number: CN113600657A
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: 2021-11-05
Anticipated expiration: 2041-07-19
Also published as: CN113600657B

Abstract

The invention belongs to the technical field of metal stamping processing, and relates to a process for forming a sharp corner at a rotating shaft of a notebook computer shell, which comprises the following steps: the horn bending angle is 50-52 degrees, 70-72 degrees, 90 degrees, 100 degrees and 110 degrees. The invention can deform the material of the flat plate structure into the sharp-angled rotating shaft structure with two side walls through five steps, thereby not only meeting the structural requirements, but also avoiding cracking.

Description

Sharp angle 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 process for forming a sharp corner at a rotating shaft of a notebook computer shell.

Background

With the competitive development of the mold industry in China, mold consumption of the general technical level in China is relatively saturated, and a large market space still exists for the mold product with high technical content, so that the mold industry in China is determined to be required to be greatly improved in the aspect of high precision to break through the current technical bottleneck. In recent years, 3C product molds mainly for notebook computers are taken as representatives, and products not only improve performance but also break through in appearance in order to match the existing 5G technology and the aesthetic sense of people. When an enterprise faces a transformation period, new technology is required to be introduced to continuously break through the difficulty of the mold, so that new technology of a new product cannot become possible, and the core competitiveness of the enterprise is improved.

As shown in fig. 1, an R0.5 sharp corner 11 exists at the edge of a rotating shaft fixing position of a notebook computer shell 11 with one type of keyboard surface, one side of the sharp corner 11 needs to be bent at 90 degrees relative to the board surface, the other side needs to be bent at 110 degrees relative to the board surface, but the two bent edges are obtained by directly stretching and deforming a piece of material which is flush with the board surface. The conventional method is to bend the workpiece into positions by three times of 70 degrees, 90 degrees and 110 degrees, but the following problems are caused:

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

2. the height of the rotating shaft can not meet the product requirement;

3. the front face R0.8 corner 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 purpose through the following technical scheme: a process for forming sharp corners at rotating shafts of notebook computer shells comprises the following steps:

firstly, forming a 75-80-degree horn angle on the edge of a flat material, bending the two side walls at an angle of 50-52 degrees, and protruding a sharp corner at an angle of 0.28-0.30 mm;

making a horn angle of 83-85 degrees at the edge of the material, folding the two side walls by 70-72 degrees, and protruding a corner by 0.20-0.22 mm;

making the edge of the material into 90 degrees, and forming an angle of 90 degrees between the two side walls;

fourthly, making one side wall of the material into a 100-degree folded angle, keeping the other side wall at 90 degrees, and making transition positions of the two side walls into arcs;

changing the 100 degree angle to 110 degree angle, keeping the other side wall at 90 degree, making the transition position of two side walls into sharp angle.

Specifically, R2.8-3.0 round corners are formed outside sharp corners.

Furthermore, R1.5-1.6 round corners are formed outside sharp corners.

Furthermore, R0.8-1.0 round corners are formed outside the sharp corners.

Furthermore, R0.7-0.8 round corners are formed outside sharp corners in the step IV.

Furthermore, R0.5 round corners are formed outside the sharp corners in the fifth step.

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

the invention can deform the material of the flat plate structure into the sharp-angled rotating shaft structure with two side walls through five steps, thereby not only meeting the structural requirements, but also 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 in the drawings represent:

1-notebook shell, 11-sharp corner;

2-a first corner shaping block, 21-a first bull's horn;

3-a second corner forming block, 31-a second bull's horn;

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

5-a fourth corner forming block, 51-a first sharp corner, 52-an arc part;

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

Detailed Description

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

Example (b):

as shown in fig. 1 to 6, the process for forming the sharp corner at the rotating shaft of the notebook computer shell of the present invention includes the steps of:

firstly, the edge of a flat material is provided with a horn angle of 75-80 degrees, the bending angle of two side walls is 50-52 degrees, and the outer protrusion at the sharp angle is 0.28-0.30 mm. The bull horn angle at the edge of the material is here punched out from the first bull horn section 21 on the first corner forming block 2, this arrangement allows the material at the location of the sharp corner to be pulled out more, leaving sufficient material for the sharp corner to be later deformed into a corner, to avoid snapping.

And making a horn angle of 83-85 degrees on the edge of the material, folding the two side walls by 70-72 degrees, and protruding a part of 0.20-0.22 mm at the sharp corner. Here the bend angle is further enlarged and the bull horn angle of the material edge is stamped out of the second bull horn portion 31 on the second corner forming block 3, this configuration further increasing the material at the sharp corner location.

Making the edge of the material into 90 degrees, and forming an angle of 90 degrees on two side walls. The structure is formed by a third corner forming block 4, the third corner forming block 4 having an angle of 90, after punching, the edges of the material forming a three-sided structure at an angle of 90 to each other.

Fourthly, one side wall of the material is made into a 100-degree folded angle, the other side wall keeps 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 having one side wall dog-ear enlarged to 100 °. To prevent tearing at the sharp corners of the material, the fourth corner forming blocks 5 further have arc portions 52 to make the transition positions of both sidewalls arc.

Changing the 100 degree angle to 110 degree angle, keeping the other side wall at 90 degree, making the transition position of two side walls into sharp angle. The structure is formed by the fifth corner forming blocks 5, the fifth corner forming blocks 5 have the second cusp 52 expanding the 100 deg. folding angle to 110 deg., and form the cusp 11 structure of the final notebook housing 1.

The method comprises the steps of making R2.8-3.0 round corners outside sharp corners, making R1.5-1.6 round corners outside the sharp corners, making R0.8-1.0 round corners outside the sharp corners, making R0.7-0.8 round corners outside the sharp corners, and making R0.5 round corners outside the sharp corners. The turning point of the material is the position which is easiest to break, and in order to control the stretching amount of the material in each step, the radius of the fillet is controlled to be in a proper range and gradually reduced, and finally the target R0.5 fillet can be reached.

What has been described above are merely some embodiments of the present invention. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the inventive concept thereof, and these changes and modifications can be made without departing from the spirit and scope of the invention.

Claims

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

2. The process for forming sharp corners at the rotating shaft of the notebook shell according to claim 1, wherein: the method comprises the following step of forming R2.8-3.0 round corners outside sharp corners.

3. The process for forming sharp corners at the rotating shaft of the notebook shell according to claim 2, wherein: and step two, making R1.5-1.6 rounded corners outside the sharp corners.

4. The process for forming sharp corners at the rotating shaft of the notebook shell according to claim 3, wherein: and step three, making R0.8-1.0 round corners outside the sharp corners.

5. The process of forming sharp corners at the rotating shaft of the notebook shell according to claim 4, wherein: and fourthly, forming R0.7-0.8 round corners outside the sharp corners.