桥臂类零件自适应专用夹具的设计

Design of adaptive special fixture for bridge arm parts

桥臂类零件的毛坯为异形铸件,因其装夹定位需花费大量时间进行调整装夹,导致该零件加工效率低、劳动强度大、成品合格率不高,针对这一问题,通过对桥臂零件的图纸和加工工艺进行分析,对专用夹具的机械结构进行了设计。利用液压夹具夹紧稳定、操作简单的特点,对夹具的液压控制系统进行了设计;为了减少劳动强度,实现智能化生产,采用数控机床生产与物料控制(PMC)程序对夹具进行了控制,通过对控制信号的地址分配、PMC程序编制等,达到了桥臂类零件智能化生产的目的。研究结果表明:该夹具在生产效率、加工质量上具有较为显著的效果;能够实现快速、准确地装夹定位,装夹效率提升3倍,且产品加工质量稳定。

Aiming at the problems that bridge arm was a special-shaped casting,it took a lot of time to adjust the clamping,which resulted in low machining efficiency,high labor intensity and low qualified rate of finished products,the mechanical structure of the fixture was designed through the analysis of the drawings and processing technology of the bridge arm parts.The hydraulic control system of the fixture was planned and designed by using the characteristics of the hydraulic fixture,which was stable and easy to operate.To reduce the labor intensity and realize the intelligent production demand,the fixture was controlled by the PMC program of the numerical control machine tool through the control address distribution of signal,PMC programming and so on.to achieve the purpose of intelligent production.The results show that the fixture has a significant effect on production efficiency and processing quality,it can achieve fast and accurate clamping positioning,its clamping efficiency is increased by 3 times,and the product processing quality is stable.