Numerically controlled tool cutting edge measuring method based on laser scanning confocal technology

Abstract

The invention discloses a numerically controlled tool cutting edge measuring method based on a laser scanning confocal technology. The numerically controlled tool cutting edge measuring method is characterized by including the steps of preprocessing of a tool cutting edge, installation of a tool, acquisition of data of the tool cutting edge and postprocessing of the data. The preprocessing of the tool cutting edge includes the steps that the tool cutting edge is cleaned, and residual chips of the cutting edge after cutter sharpening are removed to guarantee measurement accuracy. The installation of the tool includes the steps that a gauge block with the appropriate angle is selected, and the tool is correctly installed on a clamp to guarantee that the cutting edge is located at the appropriate measurement position; the acquisition of the data of the tool cutting edge includes the steps that the tool cutting edge is positioned and focused through a laser scanning confocal microscope, and layering scanning is conducted to acquire three-dimensional images of the cutting edge. The postprocessing of the data includes the steps of data smooth denoising, data calibration and cutting edge transition circular arc fitting. Representation of the transition circular arc of the tool cutting edge is completed according to the cutting edge acquired by the laser confocal scanning microscope. The method has the advantage that measurement accuracy of the cutting edge can be effectively improved without damaging the structure of the tool.

Description

technical field [0001] The invention relates to a measurement technology, in particular to a non-contact tool edge measurement technology, in particular to a numerically controlled tool edge measurement method based on laser scanning confocal technology. Background technique [0002] As we all know, after the tool is sharpened, there will be different degrees of microscopic defects on the cutting edge, and these microscopic defects will eventually affect the cutting performance of the tool. Therefore, after the tool is sharpened, passivation is generally used to further process the cutting edge. When the edge is passivated, the choice of edge shape and edge parameters is very important. At present, the commonly used blade shapes include negative chamfer, rounding and a mixture of the two. Negative chamfering parameters and rounding radius will have an important impact on cutting force, cutting temperature, tool life and machined surface quality. [0003] To judge the impa...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of low precision and poor economy of the existing tool edge measurement method, and to invent a tool edge measurement method based on laser scanning confocal technology, so as to improve the measurement accuracy of the knife edge and provide Accurate characterization of the cutting edge and subsequent research on the mechanism of cutting edge action provide conditions

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