基于ANSYS的数控复合磨床砂轮架热变形分析

Thermal Deformation Analysis of Grinding Wheel Frame of NC Compound Grinding Machine Based on ANSYS

为进一步提高磨床加工精度,需要在已减小几何误差的基础上对热变形误差进行补偿。本文对某数控外圆复合磨床进行三维模型的构建,并针对该磨床的砂轮架部分进行热源分析,根据已有方法计算热源的发热功率,分析砂轮架材料和结合面的传热率和各热源对砂轮主轴的变形影响,依据计算结果并结合砂轮架系统的边界条件建立ANSYS热变形分析模型,经过分析计算得到了砂轮架整体变形云图以及砂轮主轴在X,Y,Z三个方向的热位移,为后续砂轮主轴的热变形误差补偿提供了数据支持。

In order to further improve the machining accuracy of the grinder, the thermal deformation error should be compensated on the basis of reduced geometric errors, In this paper, the three-dimensional model for a CNC cylindrical compound grinding machine is constructed, the heat source of the grinding wheel frame is analyzed, and according to the existing method, the heat heating power of the source is calculated.The effect of grinding wheel rack material and the heat transfer rate and the heat source on the deformation of the grinding wheel spindle is also analyzed, On the basis of calculation results and the boundary conditions of the grinding wheel rack system, the ANSYS thermal deformation model is established.Through analysis and calculation, the integral deformation nephogram of the grinding wheel rack and the thermal displacement of the grinding wheel spindle in the X,Y,Z directions are obtained, which can provide data support for subsequent thermal deformation error compensation of grinding wheel spindles.