A method for detecting and correcting the positioning accuracy of the rotary axis of a five-axis machine tool

Abstract

The invention belongs to the technical field of machine tool detection, and relates to a detection and correction method of locating accuracy of a rotating shaft of a five-axis machine tool. According to the detection and correction method, an angle RTCP value of the rotating shaft in the horizontal or vertical state is measured by means of a straight bar and used as a reference value of RTVP accuracy; the RTCP accuracy of the machining tool is detected by means of a ball bar and a dial indicator, and measurement is conducted every five degrees; by means of the relation between the angle RTCP accuracy and the locating accuracy of the rotating shaft, the locating accuracy of the rotating shaft is corrected. By means of the detection and correction method, correction and compensation of the locating accuracy of the rotating shaft of the five-axis machine tool can be conducted easily, conveniently and rapidly, the detected and corrected accuracy of the rotating shaft of the five-axis machine tool can meet requirements of part manufacturing, and detection and correction time and related costs are saved.

Description

technical field [0001] The invention belongs to the technical field of machine tool detection, and relates to a method for detecting and correcting the positioning accuracy of a rotating shaft of a five-axis machine tool. Background technique [0002] At present, there are more and more five-coordinate CNC machine tools, and the positioning accuracy of the machine tools needs to be corrected and compensated regularly. The calibration and compensation methods generally use laser interferometers. Using a laser interferometer to check the positioning accuracy of a linear axis is very simple and does not require additional fixtures, but it is extremely difficult to use a laser interferometer to check and correct the positioning accuracy of a rotary axis. Checking and correcting the positioning accuracy of the rotary axis requires the use of a rotary axis angle probe. This probe requires a special tooling fixture that matches the structural characteristics of the machine tool's r...

AI Technical Summary

Problems solved by technology

Using a laser interferometer to check the positioning accuracy of a linear axis is very simple and does not require additional fixtures, but it is extremely difficult to use a laser interferometer to check and correct the positioning accuracy of a rotary axis

Checking and correcting the positioning accuracy of the rotary axis requires the use of a rotary axis angle probe. This probe requires a special tooling fixture that matches the structural characteristics of the machine tool's rotary axis. Different machine tools have different structures of the rotary axis, and the tooling fixtures cannot be used universally. Some machine tool parts need to be disassembled when installing the fixture

Generally, users will not manufacture a large number of special fixtures, so they cannot correct and compensate the positioning accuracy of the rotating shaft. In this way, the risk is relatively high when the accuracy requirements are high, especially when replacing the position detection parts of the rotating shaft. detection

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