切削液を考慮した工作機械の熱変位補償における測温点数の検討

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  • Investigation of temperature measurement point in thermal displacement compensation of machine tools considering cutting fluid

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In general, it is known that heat is a major cause of the dimensional inaccuracy of machine tools. In this research, we focused on the relation between a temperature distribution on a whole machining center and resultant displacement at a tool tip. We modeled an actual horizontal machining center for simulation and investigated the temperature of each part of the structure and the displacement of a tool tip by unsteady simulation, and showed the validity of the analytical model. We, then, investigated the relationship between the number of temperature sensors and the estimation error of resultant displacement at a tool tip by utilizing the simulation, and also the thermal influence of the cutting fluid hitting the structure. Finally, we confirmed that the influence of cutting fluid on the estimation error of the resultant displacement at a tool tip can be reduced as the number of sensors increases and we showed the number of temperature sensors for stable thermal displacement compensation despite the influence of the cutting fluid.

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