Automated fixture design for a rapid machining process

Abstract

Purpose The purpose of this paper is to present a methodology for the automated design of a fixturing system for a rapid machining process. Design/methodology/approach The method proposed is the use of sacrificial fixturing, similar to the support structures in existing rapid prototyping (RP) processes. During the machining process, sacrificial supports emerge incrementally and, at the end of the process, are the only entities connecting the part to the remaining stock material. Findings The support design methods have been shown to be extremely flexible in securing a variety of complex parts with relatively tight part tolerances using a rapid machining process. Research limitations/implications The automated design of support structures is currently relegated to use in a CNC rapid prototyping process that uses a fourth axis for rotary setups. Practical implications The methods used here make rapid machining feasible, as it solves the daunting problem of automated fixturing. Originality/value The paper proposes an innovative solution for an automatic fixturing system in subtractive RP.