Device for measuring drawing and bulging heights of test sheet and test method

Abstract

The invention provides a device for measuring drawing and bulging heights of a test sheet. The device comprises an upper mold structure, a lower mold structure, a reciprocating displacement sensor (4), a photosensitive element (5) and a photosensitive element mounting plate (6); the upper mold structure comprises an upper mold seat (1), an upper pressing insert (8) and a guiding plate (9); and thelower mold structure comprises a lower mold seat (2), a convex mold bottom plate (3), a guiding column (7), a semi-spherical convex mold (10), positioning devices (11), a lower pressing insert (12),a stroke limiting block (13) and a pulling rod baffle (14). According to the device, drawing and bulging tests are integrated in one mold, so that the test cost is reduced, and the test efficiency isimproved; and the photosensitive element and the displacement sensor are mounted in the mold structure, so that the material cracking points can be judged accurately, the accurate sheet drawing and bulging height values can be obtained, and errors caused by artificial judgment at present can be eliminated.

Description

technical field [0001] The present invention relates to all sheet metal stamping forming technologies and new material development testing technologies in automobiles, rails, aviation, ships and other transportation vehicles, instruments and appliances, and new material development, especially relates to a method for measuring the drawing and bulging of sheet metal. High test method and mold structure Background technique [0002] With energy saving, environmental protection, safety, comfort and intelligence becoming the general trend of today's automotive technology development, the development of high-strength materials, composite materials, and lightweight metal materials emerges in an endless stream. With the continuous improvement of the performance of new materials, their forming Performance can't be ignored either. In the field of sheet metal stamping forming technology and new material development, in addition to obtaining some basic performance indexes such as elas...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is aimed at the traditional testing of sheet metal drawing and bulging performance tests, which are carried out on two sets of different molds respectively. During the test, different molds need to be replaced, the process is cumbersome, the test efficiency is low, and for the discrimination of the test end point, The moment of cracking of the sheet is often determined through human subjective perception, and the judgment is not sensitive or intuitive enough, which will cause a large error in the test results.

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