锻压技术

八连杆压力机传动机构的优化设计

英文标题：Optimization design on transmission mechanism for eight-bar linkage press

作者：程超丁武学孙宇

单位：南京理工大学

分类号：TH112.1

出版年,卷(期):页码：2017,42(8):88-92

摘要：

在ADAMS中建立传动机构的铰接点，连接各点建立八连杆机构的虚拟样机模型。参数化各铰接点的横纵坐标作为设计变量，比较各设计变量对工作行程内滑块速度标准差的影响，选择敏感度较大的设计变量作为优化变量。基于曲柄存在条件建立约束关系,以工作行程内滑块速度标准差的最小值作为优化目标。采用广义简约梯度法，引入松弛变量将不等式约束转化成等式约束，用非基变量表示基变量，将目标函数改写成关于非基变量的表达式，进行迭代计算得到优化结果。适当调整优化后设计变量的值，得到最终的结果。与优化前机构对比，工作行程内，最大速度由590 mm·s-1降至425 mm·s-1，速度标准偏差由175 mm·s-1降至120 mm·s-1。

In ADAMS, the hinge point of the transmission mechanism was established, and the virtual prototyping model of the eight-bar linkage mechanism was established. The vertical and horizontal coordinates of each hinge point were parameterized as the design variables, and the more sensitive design variables were chosen as optimization variables by comparing the influence of each design variable on the standard deviation of the slider speed within the work stroke. Then, the minimum value of the standard deviation of the slider speed in the working stroke was regarded as the optimization target based on the existence of crank to establish restrictions. Furthermore, inequality constraints were turned to equality constraints by generalized reduced gradient and introducing the slack variable, and the objective function was changed into the expression with non-base variables by taking the non-base variables expressing the base variables. Finally, the optimal results were obtained by adjusting appropriately design variables. Compared with the pre-optimization mechanism, the maximum speed is decreased from 590 mm·s-1 to 425 mm·s-1, and the standard deviation of the speed is decreased from 175 mm·s-1 to 120 mm·s-1 within the work stroke.

基金项目：

江苏省重点研发计划（BE2015011-3）

程超（1995-），男，硕士研究生丁武学（1966-），男，硕士，副教授

参考文献：

［1］陈岳云.多连杆伺服压力机动态性能分析与设计研究[D]. 上海：上海交通大学,2008.Chen Y Y. On Dynamic Performance Analysis and Design of A Multi-link Servo Mechanical Press [D].Shanghai：Shanghai Jiao Tong University,2008.
［2］鹿新建,柯尊芒,朱思洪,等.多连杆高速压力机滑块运动曲线研究[J].锻压技术,2010,35(4):90-94.Lu X J, Ke Z M, Zhu S H, et al. Research on slider motion curves of multi-link high-speed press based on virtual prototype technology [J]. Forging & Stamping Technology, 2010, 35(4):90-94.
［3］夏链,张进,韩江,等.八连杆机械式压力机动力学分析[J].锻压技术,2012,37(4):164-167.Xia L, Zhang J, Han J, et al. Kinematics analysis of eight-link mechanical press [J]. Forging & Stamping Technology, 2012, 37(4):164-167.
［4］姚菁琳,郑翔,张新国.八连杆压力机传动系统的设计及优化[J].扬州大学学报：自然科学版，2014，17(1):46-49.Yao Q L, Zheng X, Zhang X G. Optimization design of eight-link transmission mechanism in mechanical press [J]. Journal of Yangzhou University：Natural Science Edition, 2014，17(1):46-49.
［5］杨益,宋爱平,郭伟,等.单自由度八连杆机构链型的拓扑特性研究[J].机械工程与自动化,2014，(2):96-98.Yang Y, Song A P, Guo W, et al. Topological characteristics of eight linkage chain-type mechanism with single degree of freedom[J].Mechanical Engineering & Automation, 2014，(2):96-98.
［6］范云霄,牟波,管聪聪.基于ADAMS的八连杆压力机的优化设计[J].机械制造与自动化,2014，(2):105-107.Fan Y X, Mou B, Guan C C. Optimum design of eight-link press based on ADAMS [J]. Mechanical Building & Automation, 2014，(2):105-107.
［7］白育全,文学洙.基于ADAMS的八连杆冲压机构的优化设计[J].延边大学学报:自然科学版,2015，(2):175-178.Bai Y Q, Wen X S. Optimum design of eight-bar linkage punch mechanism based on ADAMS [J]. Journal of Yanbian University: Natural Science Edition, 2015，(2):175-178.
［8］李初晔,孙彩霞,郑会恩.基于ANSYS的多连杆机构性能优化[J].锻压技术,2011,36(6):80-83.Li C Y, Sun C X, Zheng H E.Performance optimization of multi-link mechanism based on ANSYS[J]. Forging & Stamping Technology, 2011,36(6):80-83.
［9］李红伟.广义简约梯度算法在机械优化设计的应用[J].机电工程技术,2010,39(5):75-77.Li H W. Application of generalized reduced gradient method in mechanical design [J]. Mechanical and Electrical Engineering Technology, 2010, 39(5):75-77.

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