用数学建模方法预测车削加工所形成的表面粗糙度已有四十多年的历史。然而到目前为止,有效的方法不能较好地应用于强力车削。这里介绍一个全新的数学模型,它综合考虑了加工过程中的各种干扰,比如刀具切削刃缺陷和强力车削时的振动,这些因素影响可达到的表面粗糙度。它包括一个材料分离公式,是表达在切削过程中切屑流动和变形特点的,也允许补充信息以导出表面上给定点的产生机理。实验结果显示,即使在较低进给速度下计算的和测量的表面粗糙度参数之间也吻合得较好。 It has been more than 40 years since mathematic modeling method was used to predict the surface roughness of turning machining. However, so far, effective methods have not been well applied to heavy turning. Here is a new mathematical model that takes into account a variety of disturbances in the machining process, such as tool cutting edge defects and strong turning vibration, these factors affect the achievable surface roughness. It includes a material separation formula that expresses the flow and deformation characteristics of the chip during the cutting process and also allows additional information to derive the mechanism of generation of a given point on the surface. Experimental results show good agreement between measured and measured surface roughness parameters even at lower feed rates.