Abstract

The beam mobile five-axis gantry milling machine tool is a kind of high-speed milling machine tool with double-swing head five-axis, which is suitable for large and heavy workpieces, as the end of the machine tool transmission chain, its swing axis is directly connected with the cutting tool. Therefore, the repair of the geometric error of the swinging axis is of great significance to improve the machining accuracy of the large five-axis machine tool. Taking the XKAS2525 × 60 five-axis gantry milling machine as the research object. Firstly, the geometric error of its swing axis (B axis) is systematically classified and analyzed, and then a new iterative compensation method based on relative motion constraint equation is used to compensate the error. Finally, the repaired results are tested with S-shaped specimens. By comparing the maximum error value before and after repair, it is found that the error value after repair is greatly reduced, and the error value after repair meets the processing requirements.

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