Data selection method for calculating blunt round radius of cutting edge

Abstract

The invention provides a data selection method for calculating the blunt round radius of a cutting edge and belongs to the technical field of the geometric feature measurement for cutting tools, which relates to a data selection method for calculating the blunt round radius of a cutting edge. According to the technical scheme of the method, firstly, the profile of the cutting edge of a cutting tool is acquired based on the microscopic measurement method, and the data point curve of the profile of the cutting edge of the cutting tool is extracted. Secondly, the fitting calculation is conducted to successively approximate the straight lines of the front and back tool surfaces of the cutting cool based on the iterative method, so that the range of the fitting data points of the blunt round of the cutting edge can be obtained. Thirdly, the blunt round radius of the cutting edge, the left distance difference and the right distance difference of the cutting edge are calculated. The above fitting calculation process is repeated for iterative computation, till the left distance difference and the right distance difference meet the iterative terminating condition. According to the technical scheme of the invention, the error, caused by the uncertain range of the fitting data points of the blunt round of the cutting edge, can be eliminated. Based on the method, the blunt round radius of the cutting edge of the cutting tool can be calculated more accurately and more really through the fitting calculation process, and the programming is easier to implement. Moreover, the measurement efficiency for measuring the passivation abrasion of the blunt round of the cutting edge of the cutting tool is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of tool geometric feature measurement, and relates to a data selection method for calculating the radius of a cutting edge blunt circle. Background technique [0002] In cutting process, tool wear is unavoidable, and tool wear will seriously affect the quality of cutting process, so it is necessary to quantitatively evaluate tool wear. At present, the flank wear zone width VB is widely used in metal processing to evaluate the wear degree of the tool. However, there are many forms of tool wear, especially for the cutting of some hard and brittle metal materials and composite materials. The main evaluation index of tool wear during machining. Especially in the processing of carbon fiber reinforced composite materials, when the cutting edge blunt circle radius is small, the fiber reinforced phase is easier to be cut off, but the tool cutting edge blunt circle radius shows a significant upward trend with the n...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the existing calculation method for the radius of the blunt circle of the cutting edge cannot reasonably select the range of data involved in fitting the blunt circle of the cutting edge, a method for selecting data for the calculation of the radius of the blunt circle of the cutting edge is invented.

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