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Inconel 718 상향 엔드밀링시 절삭력에 미치는 공구형상오차
이영문,양승한,장승일,백승기,김선일 한국공작기계학회 2002 한국공작기계학회 춘계학술대회논문집 Vol.2002 No.-
In end milling process, the undeformed chip section area and cutting forces vary periodically with phase change of the tool. However, the real undeformed chip section area deviates from the geometrically ideal one owing to cutter runout and tool shape error. In this study, a method of estimating the real undeformed chip section area which reflects cutter runout and tool shape error was presented during up-end milling of Inconel 718 using measured cutting forces. The specific cutting resistance, K_(r) and K_(t) are defined as the radial and tangential cutting forces divided by the modified chip section area. Both of K_(r) and K_(t) values become smaller as the helix angle increases from 30° to 40°. Whereas they become larger as the helix angle increases from 40° to 50°. On the other hand, the K_(r) and K_(t) values show a tendency to decrease with increase of the modified chip section area and this tendency becomes distinct with smaller helix angle.
Inconel 718 하향 엔드밀링시 절삭력에 미치는 공구형상오차
이영문,양승한,장승일,백승기,이동식 한국공작기계학회 2002 한국공작기계학회 춘계학술대회논문집 Vol.2002 No.-
In end milling process, the undeformed chip section area and cutting forces vary periodically with phase change of the tool. However, the real undeformed chip section area deviates from the geometrically ideal one owing to cutter runout and tool shape error. In this study, a method of estimating the real undeformed chip section area which reflects cutter runout and tool shape error was presented during down end-milling of Inconel 718 using measure cutting forces. Contrary to the up-end milling the value of radial specific cutting resistance, K_(r) becomes larger as the helix angle increases from 30° to 40° and it shows almost same value at 50°. The value of tangential specific cutting resistance, K_(t) becomes larger as the helix angle increases same as in up-end milling, the K_(r) and K_(t) values show a tendency to decrease with increase of the modified chip section area and this tendency is distinct with helix angle 40°.