Test method and establishment method of thermoforming wrinkling limit surface based on this method

Abstract

The invention provides a thermoforming stamping test device for high-strength metal board materials, which includes: a support (1), a gas one-way valve (2), a sealing box (3), a resistance wire (4), quartz glass (5), a high-speed camera (6), an infrared temperature sensing apparatus (7), a support top cover (8), a stamping head hydraulic pump (9), a gas inlet pipe (10), a stamping head hydraulic pump connecting rod sealing ring (11), a stamping head (12), a positioning ring (13), a test piece (14), a concave die (15) and a sealing box pedestal (16). The invention also provides a test method of the thermoforming stamping test device for the high-strength metal board materials and an establishment method of a thermoforming wrinkling limit surface on the basis of the method. In the invention, the thermoforming anti-wrinkling performance of a high-strength steel plate can be determined on the basis of the height of the wrinkling limit surface. The higher is the wrinkling limit surface; the better is the thermoforming anti-wrinkling performance of the high-strength steel plate.

Description

technical field [0001] The invention relates to the field of thermoforming processing of metal sheets, in particular to a method for establishing a wrinkling limit surface for thermoforming of metal sheets. Background technique [0002] High-strength steel usually refers to steel with a tensile strength higher than 370MPa. It has a good combination of strength and toughness. Its outstanding features are high specific strength and good anti-collision performance. Realizing the lightweight of automobiles has broad market application prospects. However, experiments have shown that the formability of high-strength steel plates is poor at room temperature, and defects such as wrinkling and cracking are prone to occur, which seriously affects the popularization and application of high-strength steel plates. Studies have shown that the hot forming process can effectively improve the formability of high-strength steel plates, and is conducive to obtaining formed parts with high sur...

AI Technical Summary

Problems solved by technology

[0006] The problem to be solved by the present invention is to provide a method for establishing the wrinkle limit surface of high-strength steel plate hot forming, which can not only solve the wrinkle evaluation problem that can be solved by the traditional forming wrinkle limit surface, but also provide a method that can accurately and intuitively judge Evaluation criteria for wrinkling during hot forming of high-strength steel plates

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