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공구경로 에러 컨트롤 및 좌표계 맵핑을 이용한 다축 CNC 머시닝센터에서의 캠 가공에 관한 연구 원문보기

  • 저자

    박세환

  • 학위수여기관

    昌原大學校

  • 학위구분

    국내석사

  • 학과

    機械設計工學科

  • 지도교수

  • 발행년도

    2002

  • 총페이지

    xiv, 117장.

  • 키워드

  • 언어

    kor

  • 원문 URL

    http://www.riss.kr/link?id=T8935893&outLink=K  

  • 초록

    General Cam Mechanism which is one of the best equipments to accomplish an accurate motion transmission is widely used in the fields of industries, such as machine tool exchangers, textile machinery and automatic transfer equipments. But design and manufacturing of general cam is difficult and manufacturing is demanded high costs. This paper proposes approach for manufacturing of general cam using Multi-Axis CNC machining center. Base on these, a CAD/CAM program is presented. Also for higher productivity and great precision, optimized NC-Code is generated using tool path error control. Four type of disk cam is defined: Non-eccentricity translating type, Eccentricity translating type, Left rotating type, Right rotating type. For manufacturing of disk cam, which combined disk cam of four on one shaft, 5-axis CNC machining center with two rotating axes in one axis is used. In the first, tool path position is defined to designed shape data and tool path orientation is corresponded common normal line at manufacturing position. The integral NC-Code for manufacturing of four typed disk cam is generated using coordinate mapping between designed coordinate and work coordinate. Also for avoiding interference, tool orientation is corrected using interference angle in manufacturing disk cam with negative curvature. Also, Four type of disk cam is defined:closed typed rotating type, open typed rotating type, closed typed translating type, open typed translating type. For manufacturing of cylindrical cam, various multi CNC machining center are used. Tool path position and orientation of rough and finish manufacturing are defined to designed shape data. The integral NC-Code for manufacturing of four-typed cylindrical cam is calculated based on coordinate mapping between designed coordinate and work coordinate. Tool path error control by standard permitted tool path error is used for generating optimized NC-Code. Tool path error is vertical distance between real tool path and linear tool path. Tool path error is calculated using triangle and the Pythagorean theorem. Where triangle is made by manufacturing point and error check point. Finally, the manufacturing of general cam is simulated visually by the GCDMA, which is programmed on Visual C++ language. The methods mentioned above are verified by this program. This program can perform shape design, manufacturing, tool path error control, kinematics simulation, which can make optimized NC-Code for multi-axis CNC machining center. The proposed method can be applied easily on fields of industries.


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