Method for high-accuracy turning of outer circles or inner holes of shaft-type workpieces on numerical control machine tool

Abstract

The invention provides a method for high-accuracy turning of outer circles or inner holes of shaft-type workpieces on a numerical control machine tool. The method includes the following steps: first finish turning, namely, using a turning tool with the feed amount of f to perform turning on the outer circles or the inner holes of the shaft-type workpieces from the end portions of the outer circles or the inner holes and along the axial direction to enable a 'tool pattern' in the shape of a single thread to be formed on the surfaces of the outer circles or the inner holes of the shaft-type workpieces; maintaining clamping states of the shaft-type workpieces and cutting parameters of the turning tool to be unchanged, sequentially performing a plurality of times of the finish turning steps, and for Nth finish turning, returning the turning tool to an initial turning position, enabling cutting points on the end portions of the outer circles or the inner holes of the shaft-type workpieces and cutting points of initial finish turning to deviate angles in odd-numbered times of equally-divided 2(N-1) within the range of 360 degrees respectively, and performing turning on the outer circles or the inner holes along the axial direction. The method can be realized only by clamping for one time on the numerical control machine tool, ordinary standard turning tools are used for accurate control and revision of processing sizes of shaft-type parts, and better surface processing quality can be acquired.

Description

technical field [0001] The invention relates to the field of mechanical manufacturing engineering, in particular to a single-start thread type produced by the high-precision turning process of the outer circle or inner hole of a shaft workpiece on a numerically controlled machine tool due to the small cutting depth and feed rate. The "knife flower" method of correction. Background technique [0002] When cutting, no matter how sharp the tool is, there will be a circular arc R in the cross section of the cutting edge. In the process of finishing turning, very small cutting depth often easily causes the tool edge to vibrate during processing, resulting in the phenomenon of "cutting the knife" (that is, it is usually said that the turning tool cannot be pressed), and the turning surface of the part will appear "Vibration pattern" makes the workpiece scrapped. However, in high-precision turning, the accuracy of the last finishing or even super-finishing process is particularly...

AI Technical Summary

Problems solved by technology

Usually, in order to improve a level of precision, if this conventional precision turning method is used, it often requires a process system such as a machine tool with better rigidity, a tool with a higher level of cutting edge precision, and a higher level of operator to accurately match the cutting parameters. The input of manpower and material resources has been greatly increased, and the manufacturing cost has been greatly increased

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