Five-axis machine tool rotating shaft geometric error on-machine detection device and error field prediction method

Abstract

The invention relates to the technical field of machine tool error detection equipment, and provides a five-axis machine tool rotating shaft geometric error on-machine detection device and an error field prediction method. The device comprises a contact type measuring head online measuring system, a measuring head is installed on a machine tool spindle, and real-time measurement and recording can be carried out on measuring points on standard balls and a standard S-shaped test piece in the X direction, the Y direction and the Z direction. The four standard balls with the same size are distributed on a workbench in a circle, the center of the circle coincides with the center of the workbench, and spatial position errors of the standard balls and the standard S-shaped test piece reflect the geometric error of two rotating shafts; according to the obtained geometric errors, a five-axis machine tool rotating shaft geometric error space error field is established, and the error value of each position point in the machining space of a machine tool can be predicted.

Description

technical field [0001] The invention relates to the field of error detection of a five-axis numerically controlled machine tool, in particular to an on-machine detection device and an error field prediction method for the geometric error of a rotation axis of a five-axis machine tool. Background technique [0002] As one of the most basic processing and manufacturing units, the five-axis linkage CNC machine tool is the basis for realizing intelligent cutting. Geometric accuracy is one of the important parameters to measure the accuracy of five-axis machine tools. It can not only provide a good technical reference for the machine tool delivery process, but also provide an effective evaluation basis for the improvement of machine tool performance. At present, there are two methods to improve the machining accuracy of five-axis machine tools. One is the hardware compensation method to improve the manufacturing and assembly accuracy of various parts of the machine tool, and the ...

AI Technical Summary

Problems solved by technology

The measurement process using a laser interferometer is relatively complex and precise, and if the measurement is not accurate enough, it will lead to large errors; while the modeling process of using the R-test method to identify the 12 geometric errors of the rotation axis of a five-axis machine tool is complex and will introduce other errors Affects the simulation results; the ballbar can only detect the displacement errors in the X, Y, and Z directions of the tool tip of the five-axis machine tool, and cannot accurately reflect the tool attitude of the five-axis machine tool, making the detection error result inconvenient to correspond to the error position, resulting in error detection The result is not precise enough

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