Method for designing stamping die universal for steel and aluminum parts

Abstract

The invention discloses a method for designing a stamping die universal for steel and aluminum parts. The method comprises a part basic design procedure, a drawing die design procedure, a trimming die design procedure, a springback compensation procedure, a trimming and punching die design procedure, a flanging die design procedure and formability and size precision evaluation. According to the method for designing the stamping die universal for the steel and aluminum parts, the die designed according to the method can achieve stamping forming of a steel plate and an aluminum plate at the same time on the basis of the mechanical property difference of steel and aluminum, and it can be guaranteed that the stamped parts are free of quality defects such as cracking, wrinkling and size out-of-tolerance; and the method can be effectively applied to development of dies of automobile covering parts such as engine hoods, automobile doors and fenders, the die opening cost of manufacturers is effectively reduced, the method has important significance in pushing lightweight development of automobiles, basic characteristics of steel plate and aluminum plate stamping dies are combined, and therefore the method is easy to master and implement.

Description

Technical field [0001] The present invention relates to the field of parts manufacturing, and more particularly to a stamping die design method for use in steel, aluminum parts. Background technique [0002] At present, domestic industrial machinery machine or parts production enterprises are increasingly urgent, of which aluminum plates as relatively lightweight metal have been widely used because of their good performance and weight loss effect, especially In the automotive sheet, especially the engine cover, the door, and the exterior cover such as the vehicle, the door, and the wing plate, and the lightweight aluminum plate is used instead of the steel sheet. [0003] However, aluminum plates and steel plates obviously have a large difference in mechanical properties, and the main difference is: [0004] 1. Compared to traditional car steel sheets, the fracture elongation and thickness of the car aluminum plate are low, resulting in poor forming performance, which is prone to...

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Problems solved by technology

[0005] 2. The bending performance of the automobile aluminum plate is also poor. For the outer plate parts of the cover, the radius of the wrapping fillet needs to ensure that the material thickness is greater than or equal to 1 / 2;

[0006] 3. Automobile exterior panels made of aluminum plates need to have high requirements on the surface quality, forming adequacy and dimensional accuracy of the product. In order to change the parts from steel to aluminum, it is often necessary to open the mold again, so that Added a large equipment cost to the OEM

[0010] 2. Differences in trimming and punching process:

[0020] According to the analysis of the above-mentioned published patents, the existing technology is mainly to realize the reliable production of automobile aluminum plate stamping parts by improving and optimizing the existing stamping process, or to realize the combination of steel and aluminum by improving the existing steel production line. Line production does not solve the problem of the stamping die itself of steel plate and aluminum plate, and it cannot be applied to the manufacture of two different parts of steel plate and aluminum plate at the same time

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