关键词: 热电偶, 切削, 切削区, 测温刀具

Abstract:

Cutting  temperature measurement sensor could not directly  contact the cutting zone, for resolving this problem,a heat-resistant insulation layer was sprayed on the surface of platinum rhodium wire so as to form the heat-resistant  thermocouple initially, and then,the thermocouple covered by a  heat  insulation layer was embedded into the cemented  carbide powder,and pressed and sintered to form a thermocouple temperature measuring blade.Temperature measuring performance of thermocouple was judged by the temperature measurement experiments  in  thermostat,and the  normal  thermocouple temperature measuring cutter was used in the experiments of cutting temperature measurement. The   experiments show that the thermocouple temperature measuring cutter can take the temperature measurement of the cutting zone directly and reliably,but the life of cutter is short.Experiments also show that the larger the diameter of platinum rhodium wire,the higher yield of the thermocouple temperature measuring cutter,but accordingly,the life of cutter  is shorter.Experiments further reveal that the temperature differences among each points in the cutting zone are bigger,but the temperature of cutting measure point is stable when the temperature field of the cutting zone is in a steady state,the change of the temperature field in steady state cutting temperature can quickly response the change of the tool wear state.

Key words: thermocouple；cutting；cutting zone；temperature measurement  , cutter