Xk5025 Cnc Milling Machine Dynamic Design Of The Main Drive System

It was the spindle transmissions system of the NC milling machine which built in Qinghai No. 1 CNC Machine Tool CO. LTD that was researched in the thesis. And the application of the mechanical structure in the transmission of dynamic optimization design was also discussed in this thesis.In the thesis, the finite element modeling of the main shaft package of the transmission was built firstly, modal analyse to main shaft package was carried utilizing ANSYS software, at the same time, natural frequency and eigenvector of vibration was worked out. Next, rigidity matrix and quality matrix of spindle package was optimized dynamically using the modal gentle degree and energy distribute principle.To the structure of the main transmission, through confirming the inertia component and elastic component, the transmitting matrix model was set up. In order to working out natural frequency and eigenvector of vibration of the main shaft transmission system with computer, the program was compiled using C language programming. On this basis, the mode gentle degree and distributing rate of inertia energy and elastic energy was worked out.Finally, aimed to smallness of the modal gentle degree and equality of distributing rate of the inertia and elastic energy , the rigidity and quality of revising the sub-structure of the transmission was put forward.In addition, as to the thing that the high distributing rate of elastic energy of the sub-structure, its damping must be increased. Thus the milling machine Xk5025 received good dynamic performance.