Transactions of Materials and Heat Treatment

Title：Structural design of sixteen-step continuous progressive bending die for micro-motor shell

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Unit：

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ClassificationCode：TQ320.49+2

year,vol(issue):pagenumber：2020,45(4):159-169

Abstract：

Aimed at the technological requirements of micro-motor shell produced by curling of sheet metal, a sixteen-step continuous progressive die with seven-station continuous punching, six-station continuous bending punching and single-station blanking was designed. The whole process of die included three processes: continuous punching, continuous bending punching and punching. Aimed at the forming features of shell parts, the positioning holes were punched out at one station, and nine features of shell were punched and chamfered by six stations respectively. For the bending forming of shell parts, six stations were used to bending the punching shell continuously. In the working steps, three bending forming mechanisms were set up which were profiling concave die mechanism,

double-sided slider extrusion bending mechanism with wedge-driven and interface pressing forming mechanism to realize 360° curling of shell parts. In order to ensure the loading of subsequent bending step and the forming of inner circle, the inner circle forming part was designed as a kind of forming component which can follow the bending die to make a small distance upward floating. The final formed shell part was blanking by a single punch and transferred by a cylinder-driven connecting cylinder. The overall layout design of the die structure is simple and reasonable, and the mechanism setting is ingenious, which can provide a useful reference for the production of similar shell parts.

Funds：

湖北科技厅重点新产品新工艺项目（2014BAA020）

胡宏伟(1965-)，男，学士，高级技师 E-mail：1254306851@qq.com 通讯作者：钱应平（1970-）,男，博士，教授 E-mail：qianvp98@publicwh.hh.cn

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