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Cross beam is one of the major parts of a modern CNC machine tool, to which it is of great importance. With a long structure, it bears the weight of ram and slide carriage. Its mechanical structure has direct influence on the dynamic performance and processing accuracy of a machine tool. This paper studied a gantry type cross beam which was composed of many ribs whose good structure design is very essential. So, in this paper, the cross beam and the ribs are the major research objects which were studied by the finite element method to analyse the influence of cross beams with different rib structures on the processing performance including dynamic and static characteristic of machine tool to find out a better beam structure.

Optimization Design of Cross Beam Structure of Gantry Heavy Duty CNC Machine Tool