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Investigation of the friction effect at pin joints for the five-point double-toggle clamping mechanisms of injection molding machines 总被引:1,自引:0,他引:1
In this study, an analytical formulation for the necessary thrust of the crosshead of the five-point double-toggle clamping mechanism during real-mold clamping operation is proposed in order to investigate the effect of the friction at pin joints. The friction is considered to be a Coulomb friction. The inertia effects are not considered.Numerical examples are studied for different values of coefficient of friction to investigate the effects of friction at pin joints. In order to estimate the kinetic friction coefficient at pin joints, the motor torques required for real-mold clamping obtained by the present study are adjusted by using different values of coefficient of friction and mechanical efficiency to fit the experimental data. 相似文献
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根据建立的双曲肘合模机构的设计流程开发出用于双曲肘合模机构优化设计的计算机辅助设计(CAD)系统,着重研究了该系统的设计性能。通过对优化设计系统所设计的设备进行运动学仿真及变形模拟分析,验证了设计结果的合理性。通过与现有相同规格注塑机合模机构的对比实验,表明该设计系统设计的设备结构合理、性能良好;该CAD系统能够高效地优化并设计出不同系列规格的合模机构。 相似文献
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