Transactions of Materials and Heat Treatment

Title：Stamping process analysis and structural design of connecting rod

Authors： Yan Huajun Shao Mingjie Zhang Shuangjie Ma Shibo

Unit： Hebei University of Science and Technology Hebei Key Laboratory of Material Nearnet Forming Technology Hebei Key Laboratory of Material Nearnet Forming Technology Hebei Engineering Technology Research Center of Precision Punching Process and Die

KeyWords： connecting rod stamping progressive die layout die structure

ClassificationCode：TG386.2

year,vol(issue):pagenumber：2017,42(6):56-60

Abstract：

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.

Funds：

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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