Transactions of Materials and Heat Treatment

Title：Self-resistance heating stamping process equipment for a kind of high-strength steel U-shaped beam

Authors： Sun Huanying Liu Yi′an Zhang Han Zhang Xiaoyu Zhao Jun Zhang Quan

Unit： Material Engineering College North China Institute of Aerospace Engineering

KeyWords： hot stamping self-resistance heating high-strength steel U-shaped bending process equipment

ClassificationCode：

year,vol(issue):pagenumber：2022,47(3):130-136

Abstract：

The online stamping test platform by self-resistance heating was established, and the U-shaped bending forming die was designed and manufactured. Then, the process verification tests for the stamping technology by self-resistance heating were completed. The results show that the stamping by self-resistance heating is conducted on traditional equipment with proper innovative design of die and fixture, and the production cost of hot stamping parts is significantly reduced. In order to manufacture high-strength steel U-shaped beam parts on the automobile body, a set of stamping process equipment by self-resistance heating is designed, which can quickly clamp and unload the sheet metal by the special elastic clamping device, provide elastic tension at the same time, eliminate the bending of slender sheet metal caused by thermal expansion and cold contraction or its own weight, reduce the impact of the stamping process on the electrified circuit, cut off the mechanism cooperation between the punching structure at both ends of bending die and the blank holder ejector, realize to eject the workpiece automatically. Thus, the production efficiency can be improved.

Funds：

北华航天工业学院科研基金重点项目（ZD-2020-02）；河北省高等学校科学技术研究重点项目（ZD2018239）

孙欢迎（1980-），男，博士，副教授 E-mail：huanying417@163.com

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