六连杆机械压力机传动机构优化设计

Optimization Design of the Six-link Transmission Mechanism Used in Mechanical Press

在分析六连杆机械压力机传动机构结构尺寸设计和运动包络线基础上,建立了传动机构运动不干涉约束条件,以滑块在工作行程内速度波动量最小和接触板料速度最小为优化目标,采用惩罚函数和复合形相结合的优化算法,进行六连杆传动机构优化设计。从而解决以往的文献在进行机械压力机传动机构优化设计时,由于均未考虑传动机构的结构设计导致的运动干涉,致使优化结果难以应用到实际工程中的问题。优化算例表明,滑块速度曲线有明显改善,减小了滑块对板料的冲击,同时优化后的杆系参数能够满足各传动构件结构设计和运动不干涉要求,为六连杆机械压力机传动机构参数设计提供了有效方法。

Although the optimization design of transmission mechanism used in mechanical press has been widely described in previous literature,the motion interference caused by mechanical structure design haven＇t been considered.And the optimized results can not be adopted due to motion interference.Based on the structure dimension design and motion trajectory of the transmission mechanism,the constrained condition of motion non-intervention in the six-link mechanical press was established.To minimize the fluctuation of slide velocity in the working displacement and the contact velocity between the slide and the sheet,the complex algorithm method was introduced to conduct the dimension optimization.Finally,a case study demonstrates the optimized synthesis method for the six-link mechanical press.