Optimization of Thermal Displacement Compensation in a Machine Tool (Part2)

－Generalizing the Compensation－

Abstract

Minimizing displacements in the geometry of a machining center is essential for improving its machining precision, but a variety of thermal factors lead to such displacements. In part 1 of an ongoing study aimed at reliable displacement compensation in changing environments, it was confirmed that displacement could be estimated by measuring the temperature of the relevant parts and applying the T-method, but there were large variations in the estimated values; more precise estimates were necessary. In part 2, the study was repeated to look for problems when displacements were estimated under different environmental conditions. The estimated compensation results were worse than in part 1. The study is continuing with a reconsideration of the unit space and the items treated as features.