球头铣刀动力学模型及其铣削加工稳定性的研究

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根据螺旋刃球头铣刀的几何模型,考虑切削加工时刀齿的有交切削区及再生效应,建立球头铣刀的单刃切削力模型;进行模态实验和参数识别,建立螺旋刃球头铣刀的动力学模型;在Matlab环境下,基于龙格-库塔法对球头铣刀铣削加工过程稳定性进行仿真,结果表明：该模型能很好地描述切削过程中的稳定性及振动等动学特性,对于实际铣削加工过程及实验机的优化设计具有指导意义。 The cutting force model of the ball end milling cutter was built,basing on its geometry model,considering effective cross-cutting area of the cutting edge and regenerative effect.The dynamic model of the ball end milling cutter was presented by mode testing and parameter identifying.Runge-Kutta method was employed to simulate the milling stability of the ball end milling cutter in Matlab.The simulations show that the model can be used to describe the dynamic characteristics,such as stability and vibration.They are benefit to the optimal designs of milling process and the testing machine.