Transactions of Materials and Heat Treatment

Title：Forming technology of controlled movable die of spur gear in cold extrusion

Authors： Liu Dan Liu Hua Wang Weiqin Liu Baixuan

Unit： Zhengzhou Research Institute of Mechanical Engineering

KeyWords： spur gear cold extrusion forming movable die forming load angle collapsings

ClassificationCode：TG376

year,vol(issue):pagenumber：2016,41(9):84-87

Abstract：

In order to reduce the forming load of spur gear in cold extrusion and improve the metal

filling in tooth corner, a controlled movable die forming process was developed by analyzing

metal flow characteristics of spur gears in forming process. The regulation of metal flow,

forming load and forming defects in the forming process were numerically simulated by Deform-

3D, and the forming process was optimized. The analysis results show that when the speed of

die is half of punch speed, the tooth shape is filled evenly in the forming process with full

filling at its corner portion, and the forming load is the smallest. Furthermore, the forming

load is reduced about 20% compared with that of traditional one-way extrusion forming. The

optimal process was studied by experiment, and the experimental gear tooth forms fully without

angle collapsings. The simulation result is in agreement with experimental results.

Funds：

国家科技支撑计划资助项目（2006BAF04B06）

刘丹（1981- ），男，硕士，工程师

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