锻压技术

连杆冲压工艺分析及结构设计

英文标题：Stamping process analysis and structural design of connecting rod

作者：闫华军邵明杰张双杰马世博

单位：河北科技大学河北省材料近净成形技术重点实验室河北省精密冲裁工艺与模具工程技术研究中心

关键词：连杆冲压级进模排样模具结构

分类号：TG386.2

出版年,卷(期):页码：2017,42(6):56-60

摘要：

针对连杆进行冲压工艺分析，通过比较两套级进模排样方案，最终设计了双侧载体、双侧导正钉导正的排样方案。排样依次安排冲裁、弯曲、空工位、切断等10个冲压工序，材料利用率达到43.3%。考虑到模具精度、模具强度、加工方法等因素，对工作零件和辅助零件等部件的模具结构进行设计。针对小直径冲裁凸模容易磨损、需更换的特点，设计了快换式凸模，且凸模工作部分添加保护套，异形冲裁凸模采用挂台定位。凹模采用镶块结构，由台肩式或过盈配合方式固定。向下弯曲模具预留避让槽，向上弯曲凸模安装在卸料板上，保证弯曲顺利进行。设计了由矩形截面弹簧、弹性管、螺杆和螺塞组成的弹性卸料装置，节省弹簧运行空间。本文设计的连杆级进模设计方案能够满足工业生产要求。

The stamping process of connecting rod was analyzed, and the doubleside carriers and doubleside guide pins were arranged by comparing two kinds of progressive die layout plan. The blanking, bending, empty station, cutting and other ten stamping steps were arranged, and the utilization rate of material reached 43.3%. Taking into account the precision, strength and processing methods of die and other factors, the specific die structures of working parts and auxiliary parts were designed. According to the disadvantages of easy to wear and replacement need of punching with small diameter, a quickchange punch was designed. Then, the protective sleeve was added in the working part of punch, and profiled punches were positioned by hanging. Furthermore, the dies were designed as insert structure and fixed by a shoulder or interference fit. Therefore, the parts were bent downwards to reserve the relief slots, and the upward bending dies were installed on the unloading plate to ensure the smooth bending. At the same time, the elastic discharge device composed of rectangular crosssectional spring, elastic tube, screw and screw plug was designed to save the spring operation space. The progressive die design with connecting rod can meet the industrial production requirements.

基金项目：

河北省高等学校自然科学研究青年基金项目(QN2016229)；河北科技大学理工学院教研项目(2015Z01, ZX2016Y02)

闫华军(1978-)，男，博士，副教授

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