冷敲成形机工作机构运动学与动力学分析

Kinematic and Dynamic Analysis on Working Mechanism of Cold Striking Machine

冷敲成形是生产大模数花键和汽车离合器齿毂等齿形轴类件的高效、先进成形工艺技术。在齿形轴类零件冷敲成形过程中,冷敲机要实现打轮高速旋转敲击、主轴径向进给、工件轴精确旋转分度和轴向微量进给等多轴同步运动,同时还要承受复杂的多变载荷,工作精度要求高。本文通过分析冷敲成形工艺过程,探讨了冷敲成形工艺参数计算理论和方法;结合设备和工艺参数,建立了成形过程冷敲机工作机构的运动方程和运动学与动力学数学模型,通过仿真与分析,揭示了各种运动和各工作主轴传动之间的匹配关系及其运行规律。

Cold Strike forming is an efficient and advanced technology to produce tooth-like shaft parts such as large modulus splines and clutch hubs. The important movements of cold striking machine,such as speed rotation of strike wheels,radial feed of strike wheel axle,intermittent rotation indexing of work-piece axle and axial microfeed of work-piece,must be achieved in the process of cold strike forming. At the same time,the load is complicated and changed. The high-machining precision is required. In this study,the calculation method of process parameters in cold strike forming was investigated by means of analysis on the process of cold strike forming. Combined with machine and process parameters,the motion equations of working mechanism in cold strike machine and the mathematical model on kinematic and dynamic features of the machine were established. The matching relationship and operating rules between various main axles and motion were obtained by simulation and analysis.