Abstract
The three main steps toward automatic wear compensation are reviewed. 1. (a) Wear measurement: at present the only reliable source of informa-tion on the wear of a tool is the dimensional measurement of the machined part. Several types of transducers are described that can be used from mass production to unit production. 2. (b) Data processing: simply compensating for wear is not enough. In a microcomputer or programmable controller a model of the different tools used on the machine is defined. This model is updated by measurements of the parts and takes the cutting parameters into account. Hence tool wear can be compensated at a higher frequency than the part measurement. Tool destruction can eventually be predicted by studying the change in wear rate. 3. (c) Wear compensating device. This system is divided in two subassem-blies: the control system including the motor (or motors), the mechanical drive etc. and the tool holder itself. Two examples are shown.
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