Aluminum automobile door panel drawing die and over-drawing method

Abstract

The invention provides a novel over-drawing process design method of an aluminum automobile door panel drawing die. The aluminum automobile door panel drawing die designed by using the method comprises a male die base, a male die, a binder ring and a female die, wherein the male die is arranged on the male die base, the binder ring is nested outside the male die, and the female die is arranged atthe tops of the male die and the binder ring. The aluminum automobile door panel drawing die has the following beneficial effects that the novel over-drawing process design method is adopted as a process supplement mode, a supplement surface extends out along a product surface for a certain angle, the over-drawing angle is controlled in a small range between 10 degrees and 20 degrees, and the edgeregion of the product surface is in a bending formation state and cannot cause large flow resistance to material flow; and by adopting the novel over-drawing process design method, the springback quantity of an aluminum automobile door panel can be controlled according to the large springback characteristic of the aluminum panel, and the formability and the drawing sufficiency of the aluminum automobile door panel also can be ensured according to the low extension performance characteristic of the aluminum panel.

Description

technical field [0001] The patent of the invention relates to a new over-drawing process design method for the drawing die of the outer panel of the aluminum car door. The drawing die designed by this process can not only ensure the formability and drawing of the outer panel parts of the aluminum car door Sufficiency can also effectively control the amount of springback of the drawn parts of the aluminum door outer panel, reducing the difficulty of springback compensation. The patent of the invention belongs to the technical field of stamping forming and dies of automobile cover parts. Background technique [0002] In recent years, the automobile industry has increasingly higher requirements for energy conservation and environmental protection, and lightweight is one of the important ways for automobile energy conservation and environmental protection. Aluminum plate has good performance and weight reduction effect, and more and more lightweight aluminum plates are used to ...

AI Technical Summary

Problems solved by technology

[0005] After searching the existing domestic and foreign patent technology literature, it is found that there are domestic and foreign patents that describe the process and die design method of the drawing die of the automobile panel, but there is no relevant patent to describe the process design method of the drawing die of the aluminum automobile panel

[0006] Invention patent application number CN201210171361.3, the name of the invention is: the manufacturing method of the drawing die surface at the handle of the outer panel of the automobile door and the outer panel of the automobile door. In this patent, the process surface at the handle of the outer panel of the automobile door extends outward along its own curvature , the draft angle is in the range of 20°~25°, the fillet angle of the die is in the range of R10~R15, the fillet position of the die adopts a slanted line segment 8°~15° from the horizontal direction, and the slanted line segment is in line with the two sides Connected with R5~R10 rounded corners, this process design can effectively improve the easy deformation of the surface A of the door outer panel handle, and improve the plastic deformation rate and stiffness of the door outer panel, but this process design method is for steel door outer panel parts , which is very different from the drawing deformation process control of aluminum outer plate parts

[0007] Invention patent application number CN201310357866.3, the name of the invention is: a processing method for the outer panel of an automobile. The height of the material surface controls the uniform force on the different drawing depth areas on the same slope, so as to meet the thinning rate requirements without cracking. In this patent, the surface is supplemented by the wave-shaped drawing process, and the wave-shaped flanging knife is used. blocks to reduce flanging springback, but the process method in this patent is mainly aimed at steel front cover and top cover outer plate parts, and does not consider the problem of springback control on the product surface of the outer plate parts in the drawing process

[0009] Based on the analysis of the above patents, it can be seen that the existing technology is mainly aimed at the process design method of the steel automobile outer panel mold. Process Design Simultaneously Controls Formability, Sufficiency of Drawing, and Springback of Aluminum Door Outer Panels

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