Tool wear measuring technique on the machine using CCD and exclusive jig

Recently the applications of high speed machining have increased due to the need for high precision and high accuracy machining and machining of difficult-to-cut material. However, the high speed machining also accompanies problems: the product quality can be degraded due to the tool wear and the product cost can be increased due to frequent tool replacements. Therefore, it is necessary to develop a technique of quantitative tool wear measurement to determine the precise timing for tool replacement. In this respect, this study suggests a reliable technique for the reduction of error components by developing a system using a CCD camera and an exclusive jig to be able to precisely measure the size of tool wear in a direct manner, in addition to partly introducing Taguchi method. (C) 2002 Elsevier Science B.V. All rights reserved.