Transactions of Materials and Heat Treatment

Title：Optimization design on triangle elbow bar mechanism of mechanical

Authors： Du Wei Zhao Shengdun Jin Liying

Unit： Xi′an Jiaotong University

KeyWords： elbow bar mechanism mechanical press multiple objective optimization NSGA_II kinematics

ClassificationCode：TH112

year,vol(issue):pagenumber：2018,43(11):77-82

Abstract：

For the three structures of triangle elbow bar of mechanical press, the kinematic equation of slider was established by plural method, and the displacement, velocity and acceleration of slider at the working stage were obtained. Taking eight main dimensions of the elbow bar mechanism as design variables, the maximum velocity of the nominal pressure stroke of slider and the velocity mean square deviation as the target variable, the orthogonal test was conducted, and the influences of the main dimensions of the elbow bar mechanism on the working characteristics of slider were obtained. Based on the mechanical press parameters with nominal pressure 800 kN, slide stroke 130 mm and nominal pressure stroke 15 mm, the optimization objective was to minimize the maximum velocity and velocity fluctuation at the working stage of
slide, and the main dimensions of the three kinds of elbow bar mechanisms were optimized by the NSGA_II multi-objective optimization algorithm. Furthermore, the optimized dimensions of the three kinds of elbow bar mechanisms were obtained, and the working characteristics of slider were obviously improved by the displacement, velocity and acceleration curves of slider compared the optimized elbow bar mechanism with the original elbow bar mechanism.

Funds：

国家自然科学基金资助项目（51335009）；陕西省科学技术研究发展计划工业攻关计划（2015GY125）

杜威（1994-），男，硕士研究生,E-mail：du841652137@stu.xjtu.edu.cn;通讯作者：赵升吨（1962-），男，博士，教授，博士生导师,E-mail：sdzhao@mail.xjtu.edu.cn.

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