Iso-phote Based Tool-path Generation for Machining Free-form Surfaces

[+] Author and Article Information
Zhonglin Han, Daniel C. H. Yang

CAD/CAM Laboratory, Department of Mechanical and Aerospace Engineering, University of California, Los Angeles, Los Angeles, CA 90095

J. Manuf. Sci. Eng 121(4), 656-664 (Nov 01, 1999) (9 pages) doi:10.1115/1.2833094 History: Received July 01, 1997; Revised July 01, 1998; Online January 17, 2008


This paper presents a novel approach for generating efficient tool paths in machining free-form surfaces. Concept of iso-phote is used to facilitate tool-path generation. An iso-phote is defined as a region on a surface where the normal vector does not differ by more than a prescribed angle from a fixed reference vector. The boundary curves of the iso-phote, called iso-inclination curves, are numerically generated and are served as the initial master tool paths. These iso-inclination curves are then projected to a 2D plane which is perpendicular to the fixed reference vector. 2D curve offsetting of the projected iso-inclination curve is then performed. The resulted 2D offset curves are projected back to 3D surface to form final tool paths. The resulted tool paths can guarantee the satisfaction of machining tolerance requirements. A comparison study of this iso-phote based machining with the conventional iso-parametric machining and the iso-planar machining shows favorite result for the new approach.

Copyright © 1999 by The American Society of Mechanical Engineers
Topics: Machining
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