Transactions of Materials and Heat Treatment

Title：Experiment of two-way upsetting-extrusion precision forming of spiral bevel driving gear

Authors： Guo Kaiyuan Zhang Ruhua Wu Ze

Unit： Nanchang University

KeyWords： spiral bevel driving gear precision forming two-way upsetting-extrusion numerical simulation physical simulation

ClassificationCode：TG376

year,vol(issue):pagenumber：2017,42(12):61-67

Abstract：

In order to realize the precision forming of spiral bevel driving gear and overcome the deficiencies of existing shaping process of insufficient-filling tooth corner, complicated mold structure and large forming force, a new closed die forging process of two-way upsetting-extrusion was adopted according to the principle of effective friction. For the spiral bevel driving gear with ten tooth, the characteristics of forming process were analyzed, and a 3D model was created. Then, the forming process was numerically simulated by Deform-3D. The load-stock curve shows that the deformation process can be roughly divided into three stages as free deformation, large deformation and full filling stages. Compared with the one-way upsetting-extrusion, load values of larger and smaller ends of two-way upsetting extrusion decrease by 14% and 30% respectively, and the equivalent stress and equivalent strains are also analyzed, which provides a basis for die design and optimization. Furthermore, the spiral bevel driving gear with non-flash, full filling, clear outline, no folding and no cracking is obtained by physical simulation tests.

Funds：

江西省发明专利研发引导项目（20143BBM26105）；江西省教育厅科技计划项目（GJJ13192）

作者简介：郭开元（1992-），男，硕士研究生 E-mail：guokaiyuan136@163.com 通讯作者：张如华（1958-），男，硕士，教授 E-mail：zhangruhua@ncu.edu.cn

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