Two patterns of chip curl, namely up- and side-curl, have been widely recognized in machining operations. This paper presents the third pattern of chip curl that is called lateral-curl. The rotating axis of chip lateral-curl is perpendicular to the rotating axes of up- and side-curl. The essential differences are illustrated between the chip lateral-curl concept and the “chip-twisting” concept presented in other related studies. Based on an analytical vector analysis, a new kinematic characterization is presented for the natural (or born) lateral-curl of the chip that is associated with flat-faced tool machining. It is demonstrated that chip forms (or shapes) can be determined by four governing variables: the chip up-, lateral-, and side-curl radii and the chip side-flow angle. A method to indirectly measure the chip lateral-curl radius is presented. The effect of chip lateral-curl on chip forms is investigated through cutting tests, theoretical analysis, and computer simulations.
Kinematic Characterization of Chip Lateral-Curl—The Third Pattern of Chip Curl in Machining
Contributed by the Manufacturing Engineering Division for publication in the JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING. Manuscript received February 2001; Revised November 2001. Associate Editor: A. Shih.
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Fang, N. (July 11, 2002). "Kinematic Characterization of Chip Lateral-Curl—The Third Pattern of Chip Curl in Machining ." ASME. J. Manuf. Sci. Eng. August 2002; 124(3): 667–675. https://doi.org/10.1115/1.1468225
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