标题：Estimation of Heat Transfer Coefficients in Dry and Cold-Air Cutting
作者：Jiang, Feng; Li, Jianfeng; Sun, Jie; Zhang, Song; Yan, Lan
作者机构：[Jiang, Feng; Li, Jianfeng; Sun, Jie; Zhang, Song] Shandong Univ, Sch Mech Engn, Key Lab High Efficiency & Clean Mech Mfg, Jinan 250100, Peoples R Chi 更多
会议名称：13th International Symposium on Advances in Abrasive Technology/1st Cross-Strait Conference on Precision Machining
会议日期：SEP 19-22, 2010
来源：ADVANCES IN ABRASIVE TECHNOLOGY XIII
关键词：Heat transfer coefficient; Cold-air cutting; Finite element analysis
摘要：For the analysis of cooling effect, the cutting inserts were heated to 900 degrees C and then exposed in the room-air and cold-air with different pressure respectively. The temperature variation were recorded by infra-red (IR) pyrometer. The temperature-dependent global heat transfer coefficients were estimated by he theoretical analysis and experimental data. The finite element analysis (FEA) was employed to simulate the cooling process and modify the estimated heat transfer coefficients. The heat transfer coefficients decreased from 55.1 W/m(2).degrees C (800 degrees C) to 9.32 W/m(2).degrees C (350 degrees C) in the natural cooling and approximately 300 W/m(2).degrees C (600 degrees C) to 60 W/m(2).degrees C (300 degrees C) in the cold-air cooling. Cold-air cooling greatly increased the heat transfer coefficients, but it seemed the air pressure had little pressure on the heat transfer coefficients.