A Statistical Tool Replacement Procedure Based on Tool Life Caused by Wear or Fracture : A Study on the Designing of High Reliability Machining Systems

Abstract

One of the most important problems in constructing fully automated machining systems is the need to reduce the interruption of the cut due to the sudden tool fracture during the cut. High reliability is prerequisite for the designing of efficient and economical automated machining systems. This paper presents a statistical model to analyze the reliability of automated machining systems. The statistical model based on tool life distribution caused by wear or fracture is developed. Critical fracture rate is newly defined to reduce the interruption of the cut due to the sudden tool fracture.