338 High Efficient Evaluation Method for Z Directional Thermal Deviation of Machine Tool Caused by Spindle Rotation

Abstract

A measurement and evaluation method for thermal deviations caused by machine tool spindle rotation was standardized in ISO 230-3,then it began to be widely used. However, the method is not efficient since many cold start tests must be carried out. Therefore, a more efficient method is proposed in the study that the Z directional thermal deviation is modeled as first order lag, and this model parameters are identified using only one spindle pattern operation to evaluate the thermal characteristics. The effectiveness of the method is made clear form comparing the results from some cold start tests and two spindle pattern operation tests.