加工発熱に対処した6軸力センシングテーブルの開発

抄録

The noble 6-axis force sensing table for measurement of cutting/grinding force is addressed to eliminate the influence on force sensing of heat flow caused by cutting/grinding. The authors designed a new heat-transfer section for heat flow which is composed of conductive fins/liquid. The following two force sensing methods are individually introduced for two 6-axis force sensing tables : deformation sensing on a thin shell cylinder and a thin circular plate by strain gauges and piezo-effective static-charge sensing using four quartz crystal elements. The influence of heat flow was experimentally clarified as follows : the thin shell cylinder was suddenly broken by heat stress without any anomalous force sensing in advance; the moment caused by thermal expansion of the upper plate of the table induce a heat-induced force measurement error in the down-force direction even after cancelling outputs of four quarz crystals; the conductive section could flow about a half of the heat flow caused by cutting/grinding, reducing the mentioned heat problems.