基于有限元分析的机床导轨热变形研究

高速高精度机床切削加工过程中,在多种热源的作用下导轨会产生热变形,影响工件与刀具间的相对位置,造成加工误差。找出导轨热位移较大的点,并分析其对加工精度的影响,对于减小加工误差提高加工精度至关重要。文章在对导轨热边界条件进行分析的基础上,应用有限元分析方法,建立了一类机床导轨的有限元热变形分析模型,并进行了热变形分析计算,为分析导轨的热变形对加工精度的影响提供了依据,并为机床综合热误差补偿提供参考。

Study on Thermal Deformation of Machine Tools' Slide Guide Based on FEA

In the procedure of machining by high-speed and high-precise machine tools,many heaters cause thermal deformation of slide guide.It affects the relative position of the workpiece and tool nose,result in mismachining tolerance.It is extraordinary important to reduce the mismachining tolerance and increase the machining precise by finding the point of large thermal walking and analyzing the influence of it to the machining precise.Based on the analyzing of slide guide thermal boundary condition,This paper establishes the finite-element thermal deformation analysis model of one class slide guide using finite-element analysis method,and calculates thermal deformation dimension.It provides gist that analyses effects of slide guide thermal deformation to machining precise.It also provides reference for machine tools synthesis thermal error compensation.