International Journal of Precision Engineering and Manufacturing

Korean Society for Precision Engineering (한국정밀공학회)
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Evaluating Stability of a Transient Cut during Endmilling using the Dynamic Cutting Force Model

  • Seokjae Kang (Department of Mechanical Engineering, Pohang University of Science and Technology, Pohang, Kyungbuk) ;
  • Cho, Dong-Woo (Department of Mechanical Engineering, Pohang University of Science and Technology, Pohang, Kyungbuk) ;
  • Chong K. Chun (Dept. of Mechanical Engineering Sun Moon University, Asan-si ChoongNam , South Korea)
  • Published : 2000.12.01
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Abstract

virtual computer numerical control(VCNC) arises from the concept that one can experience pseudo-real machining with a computer-numerically-controlled(CNC) machine before actually cutting an object. To achieve accurate VCNC, it is important to determine abnormal behavior, such as chatter, before cutting. Detecting chatter requires an understanding of the dynamic cutting force model. In general, the cutting process is a closed loop system the consists of structural and cutting dynamic. Machining instability, namely chatter, results from the interaction between these two dynamics. Several previous reports have predicted stability for a single path, using a simple cutting force model without run out and penetration effects. This study considers both tool run out and penetration effects, using experimental modal analysis, to obtain predictions that are more accurate. The machining stability during a corner cut, which is a typical transient cut, was assessed from an evaluation of the cutting configurations at the corner.

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