中文摘要：

文章基于遗传算法对全电动合模机构的肘杆机构的关键参数进行优化，同时优化了限制肘杆机构性能的轴销的回转直径与后模板铰点定位尺寸，解除了不合理的轴销的回转直径与后模板铰点尺寸对肘杆机构性能的影响。结果表明：在保证行程比与速度比满足要求的基础上，力的放大比增大了11．9％且速度比曲线更平缓。在不改变肘杆机构性能的基础上，轴销的回转直径与后模板铰点尺寸可以进行平移。计算得到合模机构临界角为4．37°，曲轴角达到合模临界角时，肘杆机构开始产生合模力，当曲肘角为0°时，合模机构合模力达到最大1300kN，为全电动注塑机双曲肘内翻式合模机构的设计提供技术依据。

英文摘要：

Optimization design the double-toggle clamping unit of all electric injection molding machine through genetic algorithm,set rotation diameter of pin, template hinge point positioning size and key parameters of elbow bar mechanism as optimized parameters,removed the limitation of clamping unit＇ s performance caused by unreasonable pin rotation diameter and template hinge point positioning size. The force ratio was increased by 11.9% on the basis of ensuring the stroke ratio and speed ratio met the requirements. Rotation diameter of pin, template hinge point positioning size could be adjusted ensuring the performance of the toggle mechanism did not change. The critical angle of clamping unit was 4.37° ,the deformation force was generated when the crank angle decreases to the critical angle and reached to 1300 kN when the crank angle decreased to zero, got the relationship between the deformation force and the critical angle. Provided technical basis for the design of double-toggle clamping unit of all electric injection molding machine.