Transactions of Materials and Heat Treatment

Title：Analysis and control strategies on tooth top cracking during fine blanking

Authors： Lyu Lin Kuang Qingyun Wang Yigao Deng Ming

Unit： Chongqing University of Technology Chongqing Jiang Dong Machinery Co. Ltd.

KeyWords： tooth part fine blanking tooth top cracking lubrication counterforce blank holder force

ClassificationCode：TG381

year,vol(issue):pagenumber：2018,43(11):17-23

Abstract：

For the tooth top cracking during the fine blanking process of tooth part, the causes of the tooth top cracking in the fine blanking of tooth part were analyzed based on the combination of theoretical analysis, numerical simulation and physical experiment. Then, it was pointed out that the cause of the tooth top cracking in the forming process was due to the larger friction force on the tooth top in the forming process, which caused the larger tensile stress in the deformation zone of the tooth top to reach a certain value, and the time for cracking was 60%-80% of the whole fine blanking process. Furthermore, the influences of the main influence factors and technological parameters such as lubrication, blank holder force and counterforce on the tooth top cracking were analyzed, and verified by the experiment. Finally, it is pointed out that the lubrication condition has the greatest influence on the forming quality of tooth parts. And the strategies of preventing the tooth top cracking were put forward.

Funds：

国家自然科学基金资助项目（51375521）;重庆市高校优秀成果转化项目（KJZH14107）

作者简介：吕琳（1968-），女，硕士，教授,E-mail：lulin@cqut.edunom;通讯作者：邓明（1960-），男，硕士，教授,E-mail：dm@cqut.edu.cn

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