弧面分度凸轮廓形铣削加工系统的动力学分析

以弧面分度凸轮廓形铣削加工系统的分析与简化为基础,建立了动力学模型,利用M atlab6.0对加工系统进行了动力学仿真与分析。在凸轮切削加工过程中,振动最强烈的区域发生在切入阶段和切出阶段;与凸轮非分度区廓形加工相对应的扭振振幅小且稳定;切削用量对加工系统的动力学响应有明显的影响,工件进给速度、刀具轴向最大切削深度越小,系统的振动越弱,刀具(主轴)转速提高,工件子系统振动减弱,刀具子系统的振动增强;生产效率相同时,刀具轴向最大切削深度减小,更能有效地减弱切削加工系统的振动。

Dynamics Analysis of Machining System for Gear Cam Contour Milling

Based on the analysis and simplification of a machining system for the gear cam contour,a dynamics model is established.Dynamics characteristics of the machining system is simulated by Matlab6.0.It follows from the dynamic simulation of the machining system that the most violent vibration occurs as the cutter is engaged into the cutting zone and as cutter tends to leave the cutting zone.Dynamic response is smooth and steady as machining the contour section corresponding to dwell of the indexing plate.Machining parameters affect the dynamic response.The vibration becomes weaker and weaker with the decrease of the workpiece feeding speed or the axial cutting depth.As the speed of the cutter(spindle) increases,the vibration of the tool subsystem becomes weaker and weaker,and that of the workpiece becomes stronger and stronger.With the same productivity,decreasing axial cutting depth is more effective to weaken vibration than decreasing the workpiece feeding speed.