Bearing Deformation of Heavy-duty CNC Machine Tools & Foundation System

To study the effects of the heavy-duty gantry CNC machine tools concrete foundation on whole machine stiffness,this paper first proposed a constitutive model of reinforced composite foundation that could calculate space mesh reinforcement, establish transversely isotropic concrete foundation by boundary element equations,establish whole structure model based on finite element method,and thus complete establishing an upper and lower structure finite element-boundary element coupling model.Through practical examples,experiment of fiber Bragg grating method got the each component distribution points strain values, on the double integral of curvature at the distribution point determined part deformation curve. Meanwhile,deformation simulation analysis was carried out under the action of load,and the validity of the theoretical model was verified. Finally,bearing deformation of foundation of different reinforcement layers was studied,and some suggestions were obtained based on this theoretical model. The results provide a basis for the construction of the foundations of a heavy-duty machine tool and the selection of an optimization scheme thereof.