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조철용(Chul-Yong Cho),문상돈(Sang-Don Moon),류시형(Shi-Hyoung Ryu) 한국생산제조학회 2006 한국공작기계학회 춘계학술대회논문집 Vol.2006 No.-
Semi-finishing(중삭가공);Cusp(커습);Ball-End Mill(볼엔드밀);Tool Path(공구경로);Tool Wear(공구마모);Cutting Force(절삭력) In modem manufacturing, many products that have geometrically complicated features, including three-dimensional sculptured surfaces, are designed and produced. In the production of these complex-shaped mechanical components, e.g. automobile dies, molds, and various engineering applications, the ball-end milling process is one of the most widely used NC machining processes that consists of roughing, semi-finishing and finishing. In semi-finishing, cusps remained after roughing according to the used tools that have two patterns of stairs and wave shapes. These cusp shapes have air-cut in cutting and instability caused by high cutting speed that affects the cutting characteristics such as cutting force and tool wear. Cutting characteristics are measured and analyzed through cutting force, FFI analysis of cutting force and tool wear along cutting length according to four tool paths with same metal removal rate. As a results of the experiments, this study suggests the optimal conditions of tool path and cutting direction. This approach for the cutting characteristics of semi-finishing provides a useful aid for the productivity and efficiency improvements of NC machining processes.
조철용(Chul-Yong Cho),문상돈(Sang-Don Mun),류시형(Shi-Hyoung Ryu) 한국생산제조학회 2006 한국생산제조학회지 Vol.15 No.5
In modern manufacturing, many products that have geometrically complicated features, including three-dimensional sculptured surfaces, are designed and produced. In the production of these complex-shaped mechanical components, e.g. automobile dies, molds, and various engineering applications, the ball-end milling process is one of the most widely used NC machining processes that consists of roughing, semi-finishing and finishing. In semi-finishing, cusps remained after roughing according to the used tools that have two patterns of stairs and wave shapes. These cusp shapes have air-cut in cutting and instability caused by high cutting speed that affects the cutting characteristics such as cutting force and tool wear. Cutting characteristics are measured and analyzed through cutting force, FFT analysis of cutting force and tool wear along cutting length according to four tool paths with same metal removal rate. As a results of the experiments, this study suggests the optimal conditions of tool path and cutting direction. This approach for the cutting characteristics of semi-finishing provides a useful aid for the productivity and efficiency improvements of NC machining processes.
조철용(Chul-Yong Cho),문상돈(Sang-Don Moon),류시형(Shi-Hyoung Ryu) 한국생산제조학회 2006 한국생산제조시스템학회 학술발표대회 논문집 Vol.2006 No.5
Semi-finishing(중삭가공);Cusp(커습);Ball-End Mill(볼엔드밀);Tool Path(공구경로);Tool Wear(공구마모);Cutting Force(절삭력) In modem manufacturing, many products that have geometrically complicated features, including three-dimensional sculptured surfaces, are designed and produced. In the production of these complex-shaped mechanical components, e.g. automobile dies, molds, and various engineering applications, the ball-end milling process is one of the most widely used NC machining processes that consists of roughing, semi-finishing and finishing. In semi-finishing, cusps remained after roughing according to the used tools that have two patterns of stairs and wave shapes. These cusp shapes have air-cut in cutting and instability caused by high cutting speed that affects the cutting characteristics such as cutting force and tool wear. Cutting characteristics are measured and analyzed through cutting force, FFI analysis of cutting force and tool wear along cutting length according to four tool paths with same metal removal rate. As a results of the experiments, this study suggests the optimal conditions of tool path and cutting direction. This approach for the cutting characteristics of semi-finishing provides a useful aid for the productivity and efficiency improvements of NC machining processes.
다구찌 방법을 통한 볼 엔드밀 절삭날 형상이 가공면 거칠기에 미치는 영향 분석
조철용(Chul Yong Cho),류시형(Shi Hyoung Ryu) 한국생산제조학회 2014 한국생산제조학회지 Vol.23 No.6
In this study, the effect of cutting edge geometry, such as helix and rake angles, on surface roughness in ball-end milling is investigated by using the Taguchi method. A set of experiments adopting the L27 (313) design with an orthogonal array are conducted with special WC ball-end mills having different helix and rake angles. Analysis of variance (ANOVA) is performed to analyze the effects of tool geometry and machining parameters, such as cutting speed, feed per tooth, and depth of cut, on surface roughness. The ANOVA results reveal that helix and rake angles are critical factors affecting surface roughness; the interaction of helix angle and cutting speed is also important. This research can contribute to novel cutting edge designs of ball-end mills and optimization of cutting parameters.
자기연마법에 의한 파인세라믹 Bar의 가공특성에 관한 연구
문상돈(Sang-Don Mun),Takeo Shinmura,Hitomi Yamaguchi,Toshio Aizawa,조철용(Chul-Yong Cho) 한국생산제조학회 2006 한국생산제조시스템학회 학술발표대회 논문집 Vol.2006 No.5
In this paper, the possibility of high precision machining was confirmed by using magnetic abrasive finishing process with rotating fine ceramic bar in high speed. Also, in order to improve the surface roughness, it was used the vibration of the magnetic pole and the mixed grain which is mixed with diamond paste for ultra precision processing and electrolytic iron powder. As a result, we knew that there is closely connected with diamond grain size, change of quantity and vibration of the magnetic pole to surface roughness of ceramic bar.
자기연마법에 의한 파인 세라믹 BAR의 가공특성에 관한 연구
문상돈 ( Sang-don Mun ),( Takeo Shinmura ),( Hitomi Yamaguchi ),( Toshio Aizawa ),조철용 ( Chul-yong Cho ) 한국환경기술학회 2006 한국환경기술학회지 Vol.7 No.3
본 논문에서는 파인 세라믹 바를 고속으로 회전시켜 자기연마법을 이용하여 고정밀가공의 가능성을 확인하였다. 또한 표면 정밀도를 향상시키기 위해 전해철분과 초정밀 가공용 다이아몬드 입자를 혼합한 지립과 자극의 진동을 이용하였다. 결과적으로 다이아몬드의 입자 크기, 양의 변화 그리고 자극의 진동과 세라믹 바의 표면거칠기가 밀접하게 관련되어 있다는 것을 알 수 있었다. In this paper, the possibility of high precision machining was confirmed by using magnetic abrasive machining with rotating fine ceramic bar in high speed. Also, in order to improve the surface roughness, it was used the vibration of the magnetic pole and the mixed grain which is mixed with diamond paste for ultra precision machining and electrolytic iron powder. As a result, we knew that there is closely connected with diamond grain size, change of quantity and vibration of the magnetic pole to surface roughness of ceramic bar.
자기연마법에 의한 파인세라믹 Bar의 가공특성에 관한 연구
문상돈(Sang-Don Mun),Takeo Shinmura,Hitomi Yamaguchi,Toshio Aizawa,조철용(Chul-Yong Cho) 한국생산제조학회 2006 한국공작기계학회 춘계학술대회논문집 Vol.2006 No.-
In this paper, the possibility of high precision machining was confirmed by using magnetic abrasive finishing process with rotating fine ceramic bar in high speed. Also, in order to improve the surface roughness, it was used the vibration of the magnetic pole and the mixed grain which is mixed with diamond paste for ultra precision processing and electrolytic iron powder. As a result, we knew that there is closely connected with diamond grain size, change of quantity and vibration of the magnetic pole to surface roughness of ceramic bar.
자기연마법에 의한 파인세라믹 Bar의 가공특성에 관한 연구
문상돈,Takeo Shinmura,Hitomi Yamaguchi,Toshio Aizawa,조철용 한국공작기계학회 2006 한국공작기계학회 추계학술대회논문집 Vol.2006 No.-
In this paper, the possibility of high precision machining was confirmed by using magnetic abrasive finishing process with rotating fine ceramic bar in high speed. Also, in order to improve the surface roughness, it was used the vibration of the magnetic pole and the mixed grain which is mixed with diamond paste for ultra precision processing and electrolytic iron powder. As a result, we knew that there is closely connected with diamond grain size, change of quantity and vibration of the magnetic pole to surface roughness of ceramic bar.