Contribution to dynamic characteristics of the cutting temperature in the drilling process considering one dimension heat flow

摘要: Abstract The machining of hardened steels has always been a great challenge in metal cutting, particularly for drilling operations. Generally, is the process that most difficult to cool due tool’s geometry. aim this work determine heat flux and coefficient convection using inverse conduction method. Temperature was assessed during AISI H13 steel embedded thermocouple technique. Dry two cooling/lubrication systems were used, thermocouples fixed at distances very close hole’s wall. Tests replicated each condition, carried out with new worn drills. An analytical model used calculate temperature tool–workpiece interface define convection. In all tests drills, lowest temperatures decrease observed flooded system, followed by MQL, considering dry condition as reference. directly proportional amount lubricant applied significant MQL system when compared cutting.