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Method for forming platy pieces with negative angle

A negative-angle, plate-shaped technology, which is applied in the forming field of automobile roofs, can solve problems such as cumbersome processing and deformation of mounting holes, and achieve the effects of reducing procedures, improving production efficiency, and reducing production costs

Inactive Publication Date: 2007-05-16
BYD CO LTD
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AI Technical Summary

Problems solved by technology

[0009] However, in the previous processing methods, as shown in Figure 4 and Figure 5, in the side shaping process of the rear of the roof cover of the car, the deformation of the material is very large, so it is necessary to perform a trimming and punching process in advance, that is, after drawing. The excess waste material around the part is cut off so that the material can flow inward easily; in this way, during the side shaping process, the mounting hole already formed on the tail will be deformed (see Figure 5A), that is, the mounting hole C will move from position 1 to position 2. Therefore, the mounting holes should not be punched out first, but the punching process must be added after side shaping. Therefore, the actual forming method of the car roof with tail generally includes drawing, edge trimming, side shaping, punching, and flanging Plastic, so processing is very cumbersome

Method used

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  • Method for forming platy pieces with negative angle
  • Method for forming platy pieces with negative angle
  • Method for forming platy pieces with negative angle

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Embodiment Construction

[0023] As shown in Fig. 1, the present invention discloses a method for forming a plate-like product with a negative angle. The method includes drawing the plate-like material to form at least two intersecting surfaces. A convex portion is formed on one face, then side shaping is performed on the other face, and a negative angle portion is formed on the other face while the material of the convex portion is replenished to the negative angle portion.

[0024] Preferably, the included angle between the two intersecting surfaces is 30° to 150°. More preferably, the angle between the two intersecting surfaces is 90° to 100°. Because, if the angle is too large or too small, it is not conducive to drawing the plate-shaped parts.

[0025] Preferably, the size of the convex part is such that when the side is shaped, the material of the convex part is completely supplemented to the negative angle part, so that the material of the workpiece basically does not undergo elongation deforma...

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Abstract

The invention relates to a method for shaping sheet with negative angle, wherein said method comprises extending the sheet, to form at least two crossed surfaces, shaping the extended sheet; said extending process makes one surface form convex part; and the shaping process makes another surface form negative angle, and the convex part is filled into the negative part. Therefore, the invention can effectively control the extending deformation of sheet, to improve the quality.

Description

technical field [0001] The invention relates to a forming method of a plate-shaped part, in particular to a forming method of a negative-angled plate-shaped part, and more particularly to a forming method of an automobile top cover with a tail. Background technique [0002] In the field of automobile manufacturing, it is often necessary to form parts with complex profiles. For some products with complex profiles, it has a negative angle part, that is, the shape of the negative angle part is from top to bottom and concave inward. The forming of the negative angle part is generally formed by moving the upper die vertically downward while moving inward. Regarding the description of the negative angle part, there are many records in the prior art, for example, in CN 1373015 A, CN 1373017 A, CN 1621176 A, etc. The negative angle part itself will not be described in detail here. [0003] In the prior art, the forming process of the workpiece with the negative angle part is gene...

Claims

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Application Information

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IPC IPC(8): B21D35/00B21D22/20B21D28/24B21D19/12
Inventor 张玉欣
Owner BYD CO LTD
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