Transactions of Materials and Heat Treatment

Title：Analysis and optimization on mould wear in warm upsetting for hex bolt based on orthogonal experiment

Authors： Weng Yunxian Qin Peiliang Zhao Yaping

Unit： Suzhou Polytechnic Institute of Agriculture

KeyWords： hex bolt warm upsetting mould wear orthogonal experiment Deform-3D

ClassificationCode：TG375

year,vol(issue):pagenumber：2019,44(9):122-126

Abstract：

In order to solve the problem of excessive core wear during warm upsetting of hex blot, the whole process of warm upsetting was simulated by finite element analysis software Deform-3D, and the main reasons of core wear were analyzed. Then, the orthogonal experiment was adopted to reduce the core wear without changing the mould structure and shape. Furthermore, the forming temperature, hardness of mould surface, stamping speed and friction coefficient were chosen as the factors, and the three-level four-factor orthogonal experiment was designed. Through range analysis and variance analysis, the influences of the factors on core wear and the optimal combination of parameters are obtained with forming temperature of 720 ℃, hardness of mould surface of 65 HRC, stamping speed of 5 mm·s-1 and friction coefficient of 0.3. After recalculating，the core wear is significantly reduced compared to that before optimization. Finally, the optimal parameters were used to the actual mould trial. The results are consistent with that of finite element analysis, which provides a new idea for mould wear optimization.

Funds：

苏州农业职业技术学院青年提升计划项目(PPN 201412)

翁芸娴（1982-），女，硕士，讲师 E-mail：37744652@qq.com

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