The Geometry and Generation of NC Tool Paths

Abstract

Abstract Numerically controlled milling is the primary method for generating complex die surfaces. These complex surfaces are generated by a milling cutter which removes, material as it traces out pre-specified tool paths. The accuracy of generation of tool paths directly affects the accuracy of the manufactured part. For a given machine and cutting tool the cost of manufacture is directly dependent on the tool paths. In this paper we propose a new method for generating NC tool paths. This method gives the part programmer direct control over the accuracy (scallop height) of the final surface and is capable of yielding a uniform surface finish. We also propose a new method for step-over calculations which is robust and accurate. The method also provides the part programmer options to generate a variety of tool paths.