Calibration method of five-axis machine tool

Abstract

The invention discloses a calibration method of a five-axis machine tool. The calibration method comprises the steps of obtaining a preset number of coordinate points on the movement trajectory when each movement axis conducts uniaxial motion and calculating the direction vectors of the movement axes and the intersection point of two rotation axes according to the coordinate points; figuring out the perpendicularity between the movement axes according to the direction vectors of the movement axes; calculating the relative offset between a rotation axis coordinate system and a tool coordinate system and the relative offset between the rotation axis coordinate system and a workpiece coordinate system according to the intersection point; and collecting coordinate data of preset fixed points when the movement axes reciprocate between the preset fixed points, and obtaining the repeated positioning accuracy of the movement axes according to the coordinate data. Simple and efficient calibration of the five-axis machine tool can be realized, and the calibration precision can be improved. The invention further discloses a calibration system of the five-axis machine tool, a calibration device and a computer readable storage medium, all of which have the above beneficial effects.

Description

technical field [0001] The invention relates to the field of five-axis machine tools, in particular to a calibration method for five-axis machine tools, and also relates to a calibration system, device and computer-readable storage medium for five-axis machine tools. Background technique [0002] The five-axis machine tool includes X linear motion axis, Y linear motion axis, Z linear motion axis, A rotation axis and C rotation axis, which are high-precision equipment and have high precision requirements for machine tool calibration. At present, direct measurement is mostly used for machine tool calibration. On the one hand, some parameters in the calibration process cannot be obtained through direct measurement, such as the relative positional relationship between the origin of the rotation axis coordinate system and the origin of the tool coordinate system cannot be directly measured; on the other hand On the one hand, there are errors in the parameters obtained by direct m...

AI Technical Summary

Problems solved by technology

At present, direct measurement is mostly used for machine tool calibration. On the one hand, some parameters in the calibration process cannot be obtained through direct measurement, such as the relative positional relationship between the origin of the rotation axis coordinate system and the origin of the tool coordinate system cannot be directly measured; on the other hand On the one hand, there are errors in the parameters obtained by direct measurement, which seriously affects the calibration accuracy of the machine tool

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