RESEARCH PAPERS: Design Automation Papers

A Generalized Approach to the Replication of Cylindrical Bodies With Compound Curvature

[+] Author and Article Information
C. G. Saunders

Medical Engineering Resource Unit, University of British Columbia, Vancouver, B.C. V6T 1W5

G. W. Vickers

Department of Mechanical Engineering, University of British Columbia, Vancouver, B.C. V6T 1W5

J. Mech., Trans., and Automation 106(1), 70-76 (Mar 01, 1984) (7 pages) doi:10.1115/1.3258564 History: Received January 11, 1983; Online November 19, 2009


A generalized method of surface definition and replication for cylindrical type objects of compound curvature is presented. The interactive approach is suited to mini-computer installations used in conjunction with standard three-axis NC machines. The compound curvature surface is defined by a new form of central perspective shadow moire contourography called pericontourography. The resulting digital data are treated in such a way that a quasi-helical cutter path is generated which may be applied directly to an NC milling machine (mill turning) or an NC lathe. Specifying the surface in terms of the subsequent machining process avoids the use of complex surface fitting and reformating routines. Interference with the spherical ended tool and the object surface is automatically tested and corrections to the cutter path are made.

Copyright © 1984 by ASME
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