Experimental facility for measurement of hot forming limit of laser tailor-welded blank

Abstract

The invention discloses an experimental facility for the measurement of the hot forming limit of a laser tailor-welded blank. The experimental facility is characterized by comprising an upper mould base and a lower mould base; an accommodating space for accommodating a main body of the experimental facility is defined by the upper mould base and the lower mould base; the main body of the experimental facility comprises a heating and temperature-controlling bell jar placed on a supporting platform of the lower mould base, a spherical punch placed in the heating and temperature-controlling bell jar, a convex mould blank holder and a concave mould blank holder; the experimental facility further comprises a gas protection system communicated with the heating and temperature-controlling bell jar. The experimental facility has the advantages of effectively controlling the flow of the tailor-welded blank, providing a constant-temperature interior experimental environment, and performing on-line high temperature strain measurement and the like; through the test of the experimental facility, the test sample, which is used for establishing a hot forming limit map, of the laser tailor-welded blank can be obtained accurately under different high temperature conditions, so that the hot forming limit map of the laser tailor-welded blank is established.

Description

technical field [0001] The invention belongs to the technical field of hot stamping forming of thin plates, in particular to an experimental device for measuring the high temperature forming limit of laser tailor welded blanks. Background technique [0002] With the continuous development and maturity of hot stamping forming technology, the application of hot stamping forming technology in body parts is also more extensive. Chinese patent ZL201110080561.3 discloses an ultra-high-strength steel laser tailor-welded blank and its forming process. Through laser tailor-welded technology, two or more ultra-high-strength steel plates with different strengths and thicknesses are welded together, and then heated Stamping and forming after integration, so that different parts of a component have different strengths to meet the performance requirements required by the product. Compared with conventional stamping parts, laser tailor-welded blank hot forming technology not only improves...

AI Technical Summary

Problems solved by technology

It is more difficult to test the normal temperature forming limit diagram of laser welded blanks, and the high temperature experiment process will involve complex temperature and stress fields, so it is necessary to strictly control the mold temperature, experimental atmosphere temperature and high temperature lubrication conditions, etc. In addition, the steel plate at high temperature There are also problems such as anti-oxidation under the condition of

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