Investigation of LN2 Lubrication Effect in Cryogenic Machining -Part 2： Friction Coefficient related to Tool Wear with Mathematical Evaluation-

초 냉각 가공에서의 LN2 의 감찰 효과 연구 -공구 마모에 의한 마찰 계수 이론적 전개-

In this paper some physical evidences indicate that reduced friction occurs in an cryogenic machining process, in which LN2 is applied to the selected cutting zone. LN2 also reduced the tool wear rate to a great extent and elongated the tool life up to four times compared to emulsion cooling.