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이영문,장승일,서민교 한국공작기계학회 2003 한국공작기계학회 추계학술대회논문집 Vol.2003 No.-
In end milling process, undeformed chip thickness and cutting force vary periodically with phase change of the tool. Recently, a model has been proposed to simulate the shear and friction characteristics of an up-end milling process in terms of the equivalent oblique cutting to this. In the current study, the varying undeformed chip thickness and the cutting forces in a down-end milling process have been replaced with the equivalent ones of oblique cutting. And, the down-end milling characteristics of SM45C has been compared with that of the up-end milling previously presented with different helix angles.
이영문,장승일,서민교,손정우 한국공작기계학회 2004 한국생산제조학회지 Vol.13 No.2
In end milling process, undeformed chip thickness and cutting forces vary periodically with phase change of the tool. Recently, a model has been proposed to simulate the shear and fiction characteristics of an up-end milling process in terms of the equivalent oblique cutting to this . In the current study, a down-end milling process has been replaced with the equivalent oblique cutting process. And shear and tool-chip friction characteristics variation of SM45C steel has been studied using the end-mills of different helix angles. The specific shear and friction energy consumed with helix angle of 50˚ is somewhat larger than those of 30˚ and 40˚. The specific shear energy consumed is about 76-77% of the specific cutting energy regardless the helix angles.