锻压技术

板材框零件成形工艺改进及缺口冲模设计

英文标题：Improvement of forming process and design of notch blanking die for sheet frame parts

关键词：板材框缺口冲模冲裁折弯闸压

分类号：TG386

出版年,卷(期):页码：2017,42(1):37-40

摘要：

以2A12铝合金板材框零件为研究对象，针对其使用闸压模闸压时易出现裂纹、冲裁缺口时噪声比较大和钻定位孔工序比较繁琐的问题，从板材成形和模具设计方面改进了该零件的成形工艺。提出了用折弯机折弯板料代替闸压模闸压板料，用冲裁完的缺口定位代替在板材框双面开定位孔定位的工艺方案，改进了缺口冲模结构，将阳模设计成一边为50°斜刃、另一边为3°斜刃的形式。从冲裁力计算、模具结构、模具工作原理、模具主要零件设计等方面阐述了模具设计的过程，设计了同时冲切板材框双面缺口的模具。结果表明，使用折弯机折弯板料时未出现裂纹，用冲裁完的缺口定位板料时定位准确，采用斜刃的阳模降低了冲裁缺口时的噪声。将设计的缺口冲模应用于生产，得到了合格的零件，提高了缺口冲切的效率。

For the problems of cracks produced easily in the brake pressing process by the brake die, a relatively large noise produced by punching notch and the complicated process of drilling position hole for 2A12 aluminum alloy sheet frame parts, the forming technology of parts was improved from the aspects of sheet metal forming and die design. The technology schemes were put forward by taking bending machine to bend sheet metal instead of brake die to brake press sheet metal, and taking the notch punched to fix the position of part instead of drilling holes on the two sides of sheet frame part. Therefore, the structure of notch blanking die was improved, and the die was designed as both sides with 50° and 3° oblique edges. Furthermore, the design process of die was described from the aspects of blanking force calculation, die structure, die working principle and main parts of die design. At last, the die to punch the two-side notches of sheet frame at the same time was designed. The results show that cracks do not appear by bending the sheet metal using bending machine, the sheet frame part is accurately positioned by the notch punched, and the punching noise is reduced by the die with oblique edge. Thus, the design of notch blanking die can produce qualified parts and improve the efficiency of punching notch.

基金项目：

中国运载火箭研究院首都航天机械公司工艺项目课题（ZT14050）

作者简介：郭建军（1985-），男，硕士，工程师 E-mail：gjj1678@163.com

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