• 제목/요약/키워드: Free-form Surface Ball-end Mill

검색결과 12건 처리시간 0.03초

펜슬가공시 공구변형을 고려한 볼엔드밀이 가공 궤적 (Tool Trajectory of Ball-End Mill in Consideration of Deflection when Pencil Cutting)

  • 윤경석
    • 한국공작기계학회:학술대회논문집
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    • 한국공작기계학회 1997년도 추계학술대회 논문집
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    • pp.88-93
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    • 1997
  • Ball-end milling process is widely used in the die and mold manufacturing because of suitable for the machining of free-form surface. Pencil cutting can eliminate overload in uncut area caused by large diameter of ball-end mill before finish cutting. As the ball-end mill for pencil cutting is long and thin, it is easily deflected by cutting force. The tool deflection when pencil cutting is one of the main reason of the machining errors on a free-from surface. The purpose of the research is to find out the characteristics of deflected cutter trajectory by eddy-current sensor.

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코너부의 펜슬가공시 볼엔드밀의 공구변형 특성 (Characteristics of Tool Deflection of Ball-end Mill Cutter in Pencil Cutting of the Corner)

  • 왕덕현;윤경석
    • 한국정밀공학회지
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    • 제16권2호통권95호
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    • pp.123-129
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    • 1999
  • Ball-end milling process is widely used in the die and mold manufacturing because of suitable one for the machining of free-form surface. During the process, the pencil cutting operation can be adopted before finish cut to eliminate overload in uncut area caused by large diameter of ball-end mill. The ball-end mill cutter for the pencil cutting is easily deflected by cutting force due to the long and thin shape, and the tool deflection in pencil cutting is one of the main reason of the machining errors in a free-form surface. The purpose of this study is to find the characteristics of deflected cutter trajectory by constructing measurement system with eddy-current sensor. It was found that the severe reduction of corner radius produced the overcut during the plane cutting. Up cutting method induced the overcut both plane and slope cutting, but down cutting one induced the undercut. From the experiments, down cutting with upward cutting path can generate the small undercut surface.

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볼엔드밀에 의한 펜슬가송시 공구변형 특성 (Characteristics of Tool Deflection when Pencil Cutting with Ball-End Mill)

  • 윤경석;왕덕현;이윤경;이상훈
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 1995년도 추계학술대회 논문집
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    • pp.157-160
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    • 1995
  • Pencil cutting can eliminate overload in uncut area caused by large diameter ball-end mill before finish cutting. As ball-end mill for pencil cutting is long and type, it is easily deflected by cutting force. The tool deflection when pencil cutting with thin and long ball-end mill is one of the main reason of the machining errors on a free-form surface. The purpose of the research is to find the characteristics of deflected cutter trajectory by eddy-current sensor.

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볼 엔드밀의 경사면 가공에서 공구경로와 절삭속도에 따른 공구수명의 특성 (Characteristics of Tool Life according to the Cutting Direction and Cutting Speed in Machining on Inclined Plane using Ball End Mill)

  • 박윤종;김경균;강명창;김정석;이득우
    • 한국공작기계학회:학술대회논문집
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    • 한국공작기계학회 1999년도 춘계학술대회 논문집
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    • pp.240-244
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    • 1999
  • This paper deals with the establishment of the cutting direction on inclined plane by using ball end mill. Ball-end milling is widely used for free form surface die and mold. In these machining, the cutting parts vary because the tool tip is hemisphere shaped. The cutting characteristics, such as cutting force, surface roughness and surface profile are varied according to the variation of cutting directions. The effective tool diameter was calculated on different tilt angles and tool-path. Tool life and cutting characteristics were estimated on variation of cutting directions in the same cutting speed. In this paper, the optimal cutting direction which can be applied 3-D sculpture surface cutting is suggested.

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볼엔드밀 고속가공에서 곡면형상에 따른 절삭속도 일정제어기법 가공기술 (The Machining Technique of Curved Surface through Constant Control of Cutting Speed Method in Ball End Milling)

  • 김경균;문성준;강명창;이득우;김정석
    • 대한기계학회:학술대회논문집
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    • 대한기계학회 2001년도 추계학술대회논문집A
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    • pp.753-759
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    • 2001
  • The purpose of this study is to suggest the machining technique of the constant control of cutting speed in order to improve precision machining and tool life in high speed machining using ball end mill. Cutting speed is changed in machining free form surface like free form surface. So, we don't have supreme surface form and toll life on machining. The way to solving this problem is that we should be settled to optimal cutting speed in free form surface machining. And, to improve precision machining is executed high speed machining method to output optimum NC data with developed constant control of cutting speed program after modeling of CAD/CAM. In this paper, a comparison was made of the cutting precision and tool life in conventional cutting and those in free form surface machining applying the program developed.

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볼엔드밀 가공에서 절삭속도 일정제어기법에 의한 커넥팅로드 가공기술 (The Machining Technique of Connecting Rod through Constant Control of Cutting Speed Method in Ball End Mill Machining)

  • 강명창;정융호;김정석;문성준;김경균
    • 대한기계학회논문집A
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    • 제26권6호
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    • pp.1053-1059
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    • 2002
  • The purpose of this study is to suggest how the machining technique of constant control of cutting speed can improve precision machining and tool life in high speed machining using a ball end mill. Cutting speed is changed in machining fee form surfaces such as connecting rod die. So, we don't have supreme surface form and tool life on machining. To solve this problem we should settle on optimal cutting speeds in free form surface machining. And, to improve precision machining, We must execute high speed machining methods to output optimum NC data using developed constant control of cutting speed program after modeling by CAD/CAM. In this paper, a comparison was made of the cutting precision and tool life in conventional cutting and those in connecting rod machining applying the program developed.

데이터베이스를 활용한 CAD/CAM System개발에 관한 연구 (CAD/CAM System development using the Database)

  • 명태식;김태규;김옥현
    • 한국생산제조학회지
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    • 제8권2호
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    • pp.116-116
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    • 1999
  • In this study we propose a novel approach with which design engineers can define and design free-from surface more easily. Free-from surface is defined as a parameterics shape which consists of a set of contr ol points. Parametric shape which not only has the advantage of allowing users to perform design changes efficiently, but also provides designers with a natural design environment in which they can do their work more naturally and creatively. The objective of this study is to develop a PC level freeform surface modelling system which explicitly represents information of part geometry. In this study, freeform surface modeling system consist of three modules : freeform surface modeler, input/output modules and interface with Database. In recent year there are increasing demands for the 5-axis machining of a complicated shape. This study is the development of a CAM software system (or NC module) for the 5-axis machining of a general shape with a flat-end mill, a round-end mill, a ball-end mill.

볼엔드밀 가공시 절삭깊이와 가공위치의 변화에 따른 표면정밀도 (Surface Precision due to Change of Cutting Depth and Cutting Location when Ball End Milling)

  • 박성은;왕덕현;김원일;이윤경
    • 한국공작기계학회:학술대회논문집
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    • 한국공작기계학회 2000년도 추계학술대회논문집 - 한국공작기계학회
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    • pp.274-278
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    • 2000
  • Ball end milling process is widely used in the die and mould manufacturing because of suitableness for the machining of free form surface. But, as ball end mill is long and thin, it is easily deflected by cutting force. In this study, Cutting force, tool deflection and surface precision was measured according to the change of depth and cutting location. Cutting force was acquired with tool dynamometer and a couple of eddy-current sensor measured tool deflection in x-y direction each. After machining, surface precision was measured with roundness tester and coordination measuring machine for sculptured surface angle change and cutting depth.

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