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Indexed by:期刊论文

Date of Publication:2015-01-01

Journal:Metallurgical and Mining Industry

Included Journals:EI、Scopus

Volume:7

Issue:12

Page Number:406-411

ISSN No.:20760507

Abstract:High-strength boron steel used in auto body can not only achieve automobile lightweight, but also improve the crashworthiness. Hot punching process is the advanced manufacturing technology for forming high strength steel. At high temperature, it can improve the formability of sheet metal, reduce the spring back of forming part, and ensure the forming precision. With the finite element numerical simulation, it can effectively predict the forming process of sheet metal, and can greatly reduce high costs and long development cycle of traditional 'trial' method. In the paper, taking the B pillar of a car with '22MnB5' for example, had the thermal-mechanical coupling analysis for it. And then, the temperature distribution in sheet metal forming process and the change rate of thickness and thickness distribution after sheet forming were obtained. Having the simulation for hot forming products with thermal coupling conditions can provide effective help for the product design and process design of the punching die.