锻压技术

不同搭边对微型电机外壳级进拉深成形质量的影响规律

英文标题：Influence law of different edge on forming quality of progressive deep drawing for micro motor shell

作者：黄珍媛陈景茂魏婉珠谢佳娜陈敏生

分类号：TG386.3

出版年,卷(期):页码：2022,47(11):95-100

摘要：

针对某微型电机外壳，设计了级进冲压工艺方案，该方案设计了一种先变形后拉伸的新型柔性搭边结构；利用软件对微型电机外壳多道次拉深成形过程进行了模拟分析，并根据材料利用率、搭边平均厚度、最大减薄率和壁厚变化趋势等指标，比较了采用柔性搭边结构和传统搭边结构对微型电机外壳产品的影响，获得了不同的搭边形式对级进拉深成形过程中产品壁厚变化的影响规律。通过理论分析和实际的生产结果表明：在生产过程中，切废料式搭边直接被拉伸，搭边与工序件连接处易发生撕裂现象，而柔性搭边先发生变形再被拉伸，减薄率极小，安全性相对较高；且新型柔性搭边结构与传统搭边结构相比，在级进拉深中稳定性更高、材料流动性更好、壁厚均匀性更高、材料利用率更高，材料最大减薄率仅次于切缝式搭边。

For a micro motor shell, a process scheme of progressive stamping was designed, which was a new type of flexible edge structure that was deformed first and then stretched, and the multi-pass deep drawing process of micro motor shell was simulated and analyzed by software. Then, according to material utilization rate, average edge thickness, maximum thinning rate and change trend of wall thickness and other indicators, the influences of flexible edge structure and traditional edge structure on the micro motor shell products were compared, and the influence laws of the different edge forms on the wall thickness of product during the progressive deep drawing process were obtained. The theoretical analysis and actual production results show that in the production process, the edge of scrap cutting type is directly stretched, and the connection between edge and process part is prone to tearing. While the flexible edge is deformed first and then stretched, the thinning rate is extremely small and the safety is relatively high. In addition, compared with the traditional edge structure, the new type of flexible edge structure has higher stability in the progressive deep drawing, better material fluidity, higher wall thickness uniformity and higher material utilization rate, and the maximum thinning rate of material is only second to the edge of slit type.

基金项目：

2020年广东省科技大专项目揭阳专项（x2jq-B8210180）

作者简介：黄珍媛（1975-），女，博士，副教授，E-mail：zhenyuan@scut.edu.cn；通信作者：陈景茂（1999-），男，硕士研究生，E-mail：1427658768@qq.com

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