Transactions of Materials and Heat Treatment

Title：Composite molding process for automobile front floor and rear body

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ClassificationCode：TB332

year,vol(issue):pagenumber：2021,46(1):60-64

Abstract：

For the on-line composite molding process of front floor and rear body for automobile, the multi-element composite molding process of LFT-D high temperature blank and unidirectional carbon fiber prepreg reinforced piece mixed and extruded by the screw machine was explored. The influences of the main process parameters for composite molding (temperature of feeding material, molding pressure, mold closing speed and holding time, etc.) on the forming defects were studied by orthogonal test. Combined with mechanical performance test to screen and determine the optimized forming process combination parameters, the temperature of feeding material for unidirectional carbon fiber prepreg reinforced piece is 100 ℃, the molding pressure is 5000 kN, the speed of closing mold is 10 mm·s-1, and the holding time is 40 s.Comparing the front floor and rear body products with and without unidirectional carbon fiber prepreg reinforcement piece, the tests of impact and tensile mechanical properties were carried out under the same test conditions. The results show that the longitudinal tensile strength and the impact toughness of LFT-D products with the thickness of 2 mm can be increased by 7 to 8 times by the unidirectional carbor fiber prepreg reinforced piece with the thickness of 1.3 mm.

Funds：

基金项目:国家科技重大专项课题（2018ZX04001026）；科技部“科技助力经济2020”重点专项项目

作者简介：孙奋丽(1995-)，女，硕士研究生 E-mail：384805944@qq.com 通讯作者：边翊(1976-)，男，硕士，研究员 E-mail：bianyi@brimet.ac.cn

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