High-speed Precision Cnc Punching Vibration Studies

With the increase of the rotational speed of high speed press, the vibration has become more serious. It is necessary to research the vibration reduction of high-speed press. The methods of reducing vibration were put forward by analyzing the vibration generated by inertial force.Firstly, the mathematical modal of high speed operating mechanism had been built up, then did the kinematics and dynamic analysis, and calculated the movement of the slider and the curve of the inertia force, which provided basis for the following simulation. Also the inertial force between balancing and unbalancing were compared, and the inertial force balanced decreased much compared to the unbalanced before.Secondly, the virtual prototype models of press operating mechanism had been established basing on ADAMS and the difference of the results with the theory analysis had been compared after the simulation. The conclusion showed the feasibility of Simulation. Also the dynamic balancing mechanism had been optimized; the mechanism achieved the better balance after optimization.Thirdly, the finite element modals of crank, beam, base and combined frame had been set up in ANSYS. The free modal analysis and the constrained modal analysis were carried out, and the natural frequencies and corresponding modes were obtained and the influences of every step mode were analyzed. The results of the modal analysis showed that the dynamic characteristics met the requirement of design.At last, the dynamic modal of high speed press had been set up and the dynamic differential equation had been derived. The simulation was conducted by MATLAB, and then analyzed the influence of vibration on different parameters. On the base of them, the stiffness and damping of isolator were optimized, and got the appropriate parameters.