Cutting-tool wear evaluation and prediction method and system based on generalized wear extent

Abstract

The invention discloses a cutting-tool wear evaluation and prediction method and system based on generalized wear extent. The method and the system can be used for supplementing shortages of the existing one-dimensional and two-dimensional measurement and evaluation methods and are beneficial to the optimization of a cutting-tool wear measurement and research process and the deep understanding of a cutting-tool wear pattern and an evolutionary process thereof, and thereby better instructing the design and use of cutting tools. The method comprises the following steps: (S1) acquiring wear state data of sampling points of a cutting tool in different sampling time periods, fitting the wear state data so as to obtain a state function of the sampling points of the cutting tool, and determining the generalized wear extent according to the state function; (S2) calculating cutting-tool wear evaluating indicators and a generalized wear rate based on the generalized wear extent; (S3) evaluating cutting-tool wear conditions according to the cutting-tool wear evaluating indicators, and predicting the cutting-tool wear conditions according to the generalized wear rate.

Description

technical field [0001] The invention relates to the technical field of metal cutting, in particular to a tool wear evaluation and prediction method and system based on generalized wear amount. Background technique [0002] Tool wear refers to the gradual loss of the original geometric angle of the tool due to physical or chemical effects during the normal cutting process. The wear, breakage and service life of the tool have a great influence on the processing quality, production efficiency and cost. Therefore, the measurement and evaluation of tool wear is of great significance to guide industrial production and improve processing quality and efficiency. Tool wear is a three-dimensional phenomenon. Due to the lack of a complete and accurate system for expressing tool wear characteristics, and backward measuring equipment that cannot meet the measurement requirements, tool wear models and evaluation standards characterized by one-dimensional and two-dimensional representati...

AI Technical Summary

Problems solved by technology

Due to the lack of a complete and accurate system for expressing tool wear characteristics, and backward measuring equipment that cannot meet the measurement requirements, tool wear models and evaluation standards characterized by one-dimensional and two-dimensional representations are still widely used today.

With the development of workpiece materials and the development of corresponding tools, these two-dimensional static indicators, which are only measured from the appearance geometry, cannot fully characterize or even measure the wear pattern and wear evolution process of the tool.

For example, the same two-dimensional measurement results may represent different three-dimensional wear states; when describing tool wear under certain cutting parameters, it is easy to ignore the interaction and evolution mechanism of different states in the wear process

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