Off-line feed rate scheduling using virtual CNC based on an evaluation of cutting performance

Abstract

This paper presents an advanced technology to automatically determine optimum feed rates for 2 1/2 axis CNC machining, without requiring 2 the expertise of a machinist or the information contained in a machining data handbook. Present CAM technology does not consider important physical properties such as cutting forces and machined surface errors. However, the virtual machining system developed in this study can simulate real machining for a given set of NC codes. An analytical model for off-line feed rate scheduling is formulated to improve productivity and machining accuracy. Using this model, it is possible to regulate the-cutting force; which drastically improves the overall form accuracy of the machined surface. (C) 2002 Elsevier Science Ltd. All rights reserved.