Method for measuring service life of cutting tool, control apparatus and system thereof

Abstract

The invention discloses a method for measuring a service life of a cutting tool, a control apparatus and a system thereof. The cutting tool is driven by a motor and is used to cut a plurality of workpieces respectively. The method comprises the following steps of a) acquiring a first current value; b) acquiring an actual processing condition of a current workpiece and acquiring a plurality of sampling current values; c) according to the plurality of sampling current values, the first current value, a sampling period and a power supply voltage, acquiring an energy value consumed during a cutting process which is performed by the cutting tool on the current workpiece and storing; d) determining whether the actual processing condition is consistent with an initial processing condition; e) comparing the energy value with a first threshold; f) counting; g) determining whether a value of a workpiece number a and the actual processing condition of the current workpiece satisfy a predetermined condition; h) acquiring an energy ratio; i) comparing the energy ratio and a second threshold; and j) determining whether the service life of the cutting tool is reached.

Description

technical field [0001] The present invention relates to life prediction and management of cutting tools of numerically controlled machine tools, in particular to a method and system for measuring the service life of cutting tools. Background technique [0002] As one of the important links in the cutting processing system, the cutting tool life prediction and management are becoming more and more important in the modern production process, and it has always been the focus and hot spot in the research of mechanical processing. [0003] The traditional method of judging the life of cutting tools is generally by observing the surface of the tool and measuring the wear amount of the flank. After reaching the blunt standard, it is judged that the life has reached, or by monitoring the surface roughness of the processed workpiece , when the surface roughness of the workpiece begins to fail to meet the requirements, it is judged that the cutting tool life has reached. However, in ...

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Problems solved by technology

Moreover, these monitoring methods using external sensors basically use independent signal monitoring and processing modules, and do not make effective use of the existing information of the CNC machine tool itself.

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