Method for detecting influencing characteristic of abrasion of tools for turning large-pitch internal threads to machined surface roughness

Abstract

The invention provides a method for detecting the influencing characteristic of abrasion of tools for turning large-pitch internal threads to machined surface roughness. The method is characterized by comprising the following steps that firstly, an experimental scheme of abrasion of the tools for turning the large-pitch internal threads and the machined surface roughness is determined; secondly, a measurement scheme of tool abrasion and the machined surface roughness is determined; thirdly, a tool abrasion action sequence based on the multiple tools and a machined surface roughness action sequence based on a plurality of test pieces are built; and fourthly, an incidence matrix of the influencing characteristic of tool abrasion to the machined surface roughness is revealed. According to the method, the relevancy degrees between the test piece machined surface roughness and the tool cutting edge radius, the plastic deformation width and the rear tool surface abrasion width serve as evaluation indexes of the influencing characteristic of tool abrasion to the machined surface roughness correspondingly, the influencing degree of tool abrasion characteristic parameters to the machined surface roughness is recognized, the tool abrasion characteristic parameter having a great influence on the machined surface roughness is recognized, and an effective reference measure is provided for achieving high surface quality of the large-pitch internal threads is provided.

Description

Technical field: [0001] The invention relates to the technical field of tool cutting, in particular to a method for detecting the influence of tool wear on machining surface roughness in turning large-pitch internal threads. Background technique: [0002] Large-pitch internal thread parts are key parts that transmit torque and precision in manufacturing equipment such as large presses and nuclear power parts. The surface roughness of the left and right thread surfaces directly affects the working performance of large-pitch internal thread parts . The axial dimension and radial dimension of the large-pitch thread are both large, and the length of the thread surface development is much larger than the axial length. Turning the large-pitch thread adopts a low-speed, large-depth-of-cut, high-feed process plan, which causes the tool to be severely affected during the cutting process. Large impact can easily cause deformation and severe wear of the cutting edge of the tool, causi...

AI Technical Summary

Problems solved by technology

The existing detection scheme of tool wear and machined surface roughness, through the single cutting edge turning single test piece machined surface experiment, establishes the relationship between tool wear and machined surface roughness, this method cannot reveal the left cutting edge and right cutting edge of the tool The difference in the effect of wear on the surface roughness of the left and right thread surfaces of large-pitch internal threads; at the same time, in the batch processing of large-pitch internal threads, multiple tools are usually used to turn the thread surfaces of multiple test pieces separately. It is impossible to reveal the influence characteristics of tool wear on the surface roughness in the actual machining of large-pitch internal threads

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