单点金刚石车削加工的动态特性研究

CHARACTERIZATION OF CUTTING DYNAMICS IN ULTRA-PRECISION DIAMOND TURNING

提出并应用多元资料随动系统(MDDS)法,对单点金刚石车削(SPDT)加工的工件表面若干径向剖面上的表面粗糙度轮廓逐波分解。这些波长成分的特征与不同的表面形成机理存在着相互对应关系,可以其相对功率来衡量表面形成机理对总粗糙度的影响。由于考虑了局部的切削动态特性,该方法克服了传统的DDS和FFT频谱分析法在SPDT中表征材料属性的局部变化、切削动力学和表面粗糙度的不足。

A multiple data dependent systems (MDDS) method is presented which provides a component by component wavelength decomposition of the surface roughness profiles at a finite number of radial sections of the workpiece. The characteristics of these wavelength components are correlated to different surface generation mechanisms. Their relative powers are used to measure the contributions of the mechanisms to the total roughness. Since the localised cutting dynamics are taken into account, the method resolves the shortcomings of conventional DDS and FFT spectrum analysis methods in characterising the localised variation of the material properties, cutting dynamics and surface roughness in SPDT.