Transactions of Materials and Heat Treatment

Title：Study on service life of core mold for vehicle hollow hexagonal rod based on finite element analysis

Authors： Zhao Huizhen Cui Huali

Unit： Institute of Intelligent Manufacturing Zhengzhou University of Economics and Business

KeyWords： hollow hexagonal rod deep hole extrusion wear model core mold structure TiAlN coating

ClassificationCode：TG376.3

year,vol(issue):pagenumber：2023,48(7):177-183

Abstract：

In the deep hole extrusion process for a vehicle hollow hexagonal rod, the core mold responsible for forming deep holes has great force, the surface wear is serious, and the failure is rapid. Therefore, in order to solve this problem, based on the classic adhesive wear theory, the extrusion processes of five kinds of core molds with different structures were studied by saftware Deform 11.0, and the maximum wear depth and the severe wear area on the core mold surface were compared. The results show that the service life of tapered core mold is longer under the same condition. For the purpose of reducing wear, the size parameters of tapered core mold were optimized by orthogonal test. At the same time, the wear reduction effect of different coatings on the core mold surface was studied. The results show that the wear reduction effect of TiAlN coating is better. Thus, the deep hole forming of parts is conducted by the improved core mold, the forming quality of hole is better, and the service life of core mold is 2.48 times that of the original mold.

Funds：

校级青年科研基金项目（QK2114）

作者简介：赵慧真（1988-），女，硕士，讲师 E-mail：zhz8812@163.com

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