Multi-axis numerical-control machine tool processing precision retaining ability optimization method based on robust design

Abstract

A multi-axis numerical-control machine tool processing precision retaining ability optimization method based on a robust design belongs to the machine tool precision design field. The invention especially relates to a modeling method of a space error of a multi-axis numerical-control machine tool, a machine tool reliability optimization design method and a robust optimization design method. A space error model of the multi-axis numerical-control machine tool, a reliability model under a multi-failure mode, a sensitive degree model and a machine-tool total cost model are established. A process is characterized in that a minimum sensitivity and lowest cost are taken as an object; the reliability is taken as a constraint; a machine tool geometry parameter error is optimized and a machine tool processing precision retaining ability is increased. By using the method, a multi-axis numerical-control machine tool geometry error acquisition problem and a machine-tool main transmission assembly precision grade determination problem are radically solved.

Description

technical field [0001] The invention relates to a geometric precision design method of a multi-axis numerical control machine tool, in particular to a geometric precision design method of a multi-axis numerical control machine tool with optimized machining precision retention, belonging to the field of machine tool machining precision design. Background technique [0002] As the basic equipment of advanced manufacturing technology, CNC machine tools are directly related to the development of pillar industries such as aviation, aerospace, ships, automobiles, petrochemicals, construction, and basic industries such as energy and transportation. The quality and reliability of CNC machine tools have become constraints An important bottleneck in the development of the country's manufacturing industry. In the performance evaluation and optimization design process of CNC machine tools, its machining accuracy and its retention play an important role. [0003] The machining accuracy ...

AI Technical Summary

Problems solved by technology

However, a small number of studies have applied the reliability design method and the robust design method to the mechanical design at the same time, especially the optimization design of the machining accuracy of the machine tool is still very rare.

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