Translated Abstract
High-speed press is a kind of automation punch machine, which is suitable for continuous work and high-speed stamping. In recent years, with the rapid development of aviation, automobile, eletronic and communication industry of our country, the demand for stamping parts is growing day by day. By this trend, high-speed press has been widely used due to the characteristics of high production efficiency, high automation, and high presicion. Comparing with common press, the work speed of high-speed press is much higher, and the inertial force it induced is much higher too. If the inertial force can not be balanced effectively, it will cause vibration and noise, even reduce the presicion of the prossessing, and shorten the service life of the mould. Therefore, how to balance the inertial force effectively, thus to improve working stabalility of the mechine, has become one of the urgent problems solved in design process of the high-speed press.A new inertial force balancing mechanism with double crank, double balancing block, single crankshaft for high-speed press has been proposed, based on the development of high-speed press whose nominal force is 1250kN. The main design idea is the symetric mechanism and lever balance which combines with regenerative innovation design method. And by using CAD software Pro/E, the 3D model of the mechanism has been established according to the dimensions of 1250kN high-speed press. Thereby, the parameters which will be used in relative analysis have been obtained from the 3D model.The mathematical model for kinematics and dynamics analysis have been fomulated at the same time. By substituting the parameters into the mathematical model and calculating by using mathematical analysis software MATLAB, the displacement, velocity, acceleration of moving components, and the force on each hinge point have been obtained. After that, a comparative analysis of the results from theoretical calculation and the results from simulation by using dynamic analysis software ADAMS has been taken to prove the correctness of the mathematical model for kinematics and dynamics analysis. On this basis, with genetic algorithm and topological optimization, optimization designs have been made which intend to improve the Kinematics and inertial force balancing performance, and reduce the mass of the slider. After optimization, the speed fluctuation in strock trip of slider have been reduced 20%, the pressure angle have been reduced 32%, the mass of the slider have been reduced 17.6%, the amplitude of unbalance inertial force have been reduced 82.6%.From the above, good optimization effects have been achieved.After finishing the motor selection, the flywheel and the combined closed body design for 1250kN high-speed press, static analysis and modal analysis for the body have been taken by using finite element analysis software ANSYS. After that, the improvement suggestions for body design are proposed based on the analysis results.
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