Integration of tool selection with design - Part 2: Aggregate machining time estimation

This paper describes the cutting data estimation functions of an aggregate tool selection system during the early stages of design. Part 1 concentrate d on the data structures and methods required to implement tool selection w ithin a feature-based design environment. This paper discusses the estimati on of machining times necessary to assess the tools selected using machinin g performance related criteria. The result is a methodology comprising thre e main elements: (a) cutting condition estimation using tables of recommend ed cutting conditions for various tool types, tool diameter and component m aterial combinations, (b) path length estimation based on procedures about how each feature type will be manufactured, and (c) the calculation of mach ining times considering the predicted effect that surface finish has on mac hining times. The results from the testing of real components were critical ly assessed and found to be very encouraging. (C) 2000 Elsevier Science B.V . All rights reserved.