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강신조(Shin-jo Kang),조시완(Si-wan Cho),이희관(Hi-kwan Lee),공영식(Young-sik Kong),양균의(Gyun-Eui Yang) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.6_2
In conventional NC milling semi-finishing cutting has been neglected. The NC milling performs only rough cutting and finish cutting. When the uncut can leave big, finish cutting has troubles such as overload and tool breakage, etc. In consequence efficiency of manufacturing is decreased. The troubles can be overcome with semi-finish cutting.<br/> The semi-finish cutting using contour curve has many advantages to satisfy many cutting conditions, supporting with constant cutting force, good machinability and fast cutting speed. But tool interference in contour tool path is limited to 2 dimensional pocket, trimming, etc. The paper presents a method which can avoid the tool interference in 3 dimensional milling. The method uses characteristic points such as apex, sink and saddle point Ridge-valley curve makes contour tool path interference-free tool path. The method has better performance than conventional tool path.<br/> Also, the tool path results in good accuracy of surface by using scan-line tool path in finish cutting. With the many cutting conditions satisfied, the tool path can provide the reduction in lead time of production. For semi-finish cutting tool path interference-free contour tool path are generated.<br/>
Solid Modeling 기법을 응용한 복합곡면 가공에 있어서 공구간섭 제거
장동규,조시완,양균의 한국공작기계학회 1996 한국생산제조학회지 Vol.5 No.2
Compound surface modeling is widely used for die cavities and punches. A compound surface is defined in 3-D space by specifying the topological relationship of several analytic surface elements and a sculptured surface. A constructive solid geometry scheme is employed to model the analytic compound surface. the desired compound surface can be accomplished by specifying topological relationships in terms of boolean relations between primitives and the sculptured surfaces. Additionally, a method is presented for checking and avoiding the tool interference occurred in machining the compound surface. Using this method the interference of concave, convex, and side region can be checked easily and avoided rapidly.