Method and device for detecting abrasion of cutting tool during work of numerical control machine

Abstract

The invention relates to a method for detecting the abrasion of a cutting tool during the work of a numerical control machine, comprising the following steps of: acquiring data of the vibration frequency of a main shaft of the numerical control machine at appointed time or times when the numerical control machine changes the cutting tool and starts to work, and acquiring the vibration frequency mean value of the data; setting the vibration frequency mean value as a vibration frequency standard value, and acquiring a vibration frequency threshold value according to the vibration frequency standard value; acquiring the current value of the vibration frequency of the main shaft of the numerical control machine according to a set period; comparing whether the current vibration value of the main shaft is within the vibration frequency threshold value; if so, acquiring the current value again for comparison; and if not, judging the abrasion of the cutting tool, and sending a stopping signal of a lathe. The invention also relates to a device for detecting the abrasion of the cutting tool during the work of the numerical control machine. The method and the device for detecting the abrasion of the cutting tool during the work of the numerical control machine, disclosed by the invention, have the characteristics of automation and less time spending.

Description

technical field [0001] The invention relates to processing equipment, more specifically, to a method and device for detecting cutting tool wear when a numerical control machine tool is working. Background technique [0002] When CNC machine tools (for example, CNC milling machines, CNC lathes, etc.) are working, their machining accuracy is not only affected by the accuracy of the machine tool itself and cutting parameters, but also a more important factor is the degree of tool wear. If the tool has a large degree of wear, the size of the processed product will exceed the standard, which makes the processed workpiece scrapped or requires more time to repair it. However, when the CNC machine tool is processing products, since the tool is installed on the spindle of the CNC machine tool, and the spindle rotates during processing, there is no way to measure whether the wear of the working tool exceeds the standard. In the prior art, to solve the impact of tool wear, a common me...

AI Technical Summary

Problems solved by technology

This method has shortcomings. Firstly, due to the different material, hardness and shape of the workpiece to be processed, and the influence of the quality stability of the tool, it is difficult for the operator to make an accurate judgment, which brings time and material loss; Secondly, each shutdown will bring a certain time delay, resulting in a longer production cycle.

Therefore, the existing methods for judging tool wear have the defects of many human factors and long time-consuming

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