Dynamics Simulation Of The Operating Mechanism And Structure Optimization Of The Frame Of The HD-200High-speed Press

With the development of economy and manufacturing technology, the role of metal forming machinery in the modern manufacture are more and more important and its proportion is becoming larger. Mechanical press is used most extensively. With the development of science and technology, the development tendency of modern mechanical press is high-speed, high-efficiency, high-precision, high-flexibility. Then high speed precision press was invented. High speed press works without artificial feeding, while raw materials are sent to die for processing. It is automatic, efficient and precise and is widely used in modern industry. Compared with the general press, high speed press usually produces larger unbalanced inertia force because of high speed, so that it often has the issues of significant noise and vibration, which seriously effecting the machining accuracy, efficiency of the press and die life.With the development of science and technology and computer technique, especially the development of finite element analysis software and technologies, static and dynamic characteristics of finite element analysis can be used for the press as an integral whole, which is available to guide people to design and improve the press effectively and reasonably. All of that is more helpful to the research of issues of noise and vibration. HD-200series closed-type two-point high speed precision press is taken as the research object in this paper to research the issues of vibration and noise reduction, so that the high speed press can be used more applicably.The multi-body dynamics model of the motion mechanism of the HD-200high speed press was built up. The kinetic and dynamic simulation analysis was studied using ADAMS. Then the optimization and improvement of the press were researched. The results show that the change value of unbalanced inertia force reduces and the dynamic balance will be more successful. Other factors that may affect the dynamic balance of the press were also researched and some related conclusions were drawn. Finite element model of the combined frame of the high-speed press was built up. Statics analysis, modal analysis and transient analysis of representative blanking loads were performed to combined frame. Stress and strain of combined frame, the first six natural frequency and corresponding vibration modes and dynamic response of the typical process are obtained.On this basis, based on the structural characteristics of high speed press, parameterization design model of partial sizes of press frame was established. Eight parameters most influencing the weight and the first body natural frequency was choosed as design variables, which was obtained though sensitivity analysis. The smallest mass of frame was taken as the objective function and the first body natural frequency and deformation was taken as constraint conditions. Then Multi-objective optimization design was carried out to obtain the optimal case.Finite element model of the optimized combined frame of the high-speed press was built up and statics analysis, modal analysis and transient analysis of representative blanking loads were performed to it. Compared with the original frame, the results show that the mass of optimized frame is decreased significantly, the stress concentration of top rail disappeared, the equivalent stress and deformation distribute reasonably, the first inherent frequency increases obviously, and the kinetic characteristic of the optimized frame is improved and the optimization effect is significantly.