Modal analysis of nc carving and milling machine tool system

Because of CNC carving and milling machine tool of the relative vibration between the tool and workpiece will affect machining precision, and cutter fixed on the spindle, belongs to the board system, workpiece is fixed in the numerical control carving and milling machine tool worktable, so it is necessary to research CNC carving and milling machine tool slide system respectively and the natural frequency of the workbench system. Workbench are connected to the lathe bed by rolling guide and ball screw, and slide system interactions can be ignored. In finite element analysis, to solve the inherent frequency is actually solving eigenvalue problem, namely a Ⅳ a degree of freedom structure must be Ⅳ characteristic values ( Namely has Ⅳ inherent frequencies and corresponding vibration mode) And at the same time, the result is obtained by finite element analysis of the structure of the modal number is more comprehensive.