Research on Lightweight and Performance of High-End CNC Machine Workbench

The lightweighting of high-end CNC machine tools has always been a research hotspot. This study mainly studied a new lightweight worktable. After modifying the original structure, the relationship among different materials (glass fiber reinforced plastics (GFRPs) and carbon fiber reinforced plastics (CFRPs)), different structures (square tube, round tube, regular hexagon) and different loading forces (vertical load, longitudinal load, transverse load) were compared and analyzed. This study combines the dual verification and comparison of lightweighting theory and modal experiments, using Ansys workbench 14.0 and LMS Modal Tester 4.5 to analyze the optimal combination and draw some important conclusions. 39/5000. Meanwhile, the workbench design was evaluated and improved based on deformation, maximum stress, natural frequency, and mass. The results show that the CFRP workbench had been improved in terms of axial, tangential, and vertical load deformation and that the maximum stress under axial, tangential, and vertical loads, which were 20.63%, 26.44%, 34.83%, 2%, 3.44%, and 9.09% higher than the GFRP workbench, respectively, and 19.05%, 36.25%, 45.39%, 60.94%, 58.23% and 66.67% higher than the raw material workbench, respectively. In the case of using CFRP, regular hexagons were significantly improved after specific modifications of different structures such as tubes, round tubes, and raw materials. Taking into account the complexity of the manufacturing process and cost reasons, the lightweight workbench was processed using a round tube honeycomb arrangement method. By analyzing the weight, the CFRP tube (honeycomb) arrangement lightweight worktable was reduced by about 25.71% compared with the original worktable. The error of the first-, second-, and third-order natural frequencies between the finite element simulation and the measured results were within 7%.