Finite Element Analysis And Structure Optimization Of High Speed Compound Transmission Press

High-speed composite transmission press has not only the characteristics of high speed and high efficiency of mechanical presses,but also the advantages of hydraulic press forming and processing adaptability;it is widely involved in various industries such as automobile,machinery,transportation,hardware and power industries.In this paper,the object of 8000 KN high-speed composite transmission press is studied,which is involving its composition and working principle,static analysis,structural optimization and modal analysis.High-speed composite transmission press is a forging machine equipment,it utilizes hydraulic system to control high-precision low-damping composite cylinder,then the small slider driven by the oil cylinder leads the symmetrical connecting rod force-increasing mechanism to realize the fast descent of the slider,slow pressing,holding pressure and fast return.In addition,the finite element structure analysis of the high-speed composite transmission presses can reveal the equivalent stress values and deformation of its central components.Both of each crucial structure are within the safe range.Then,the deformation measurement of different central structural components was carried out by laser detector under different working loads,The maximum deformed deflection value of the press test results and simulation results were compared,and are almost the same,it illustrated that the simulation results are valid,By fitting the regression.According to the analysis,the guide pillar and pillar radius of the high-speed composite transmission press are taken as independent variables,and the deformation,equivalent stress of the whole machine are used as the objective functions.Comparison of the results before and after optimization shows that the maximum equivalent stress and body Y-axis direction of maximum deformation were significantly reduced,which shows the performance of the press has been greatly improved before the optimization,and meet the design requirements of the fuselage.It can be seen that the natural frequencies of the first six orders are both greater than the operating frequency and the sub-acoustic frequency in the two states,this shows that the press produces neither resonates nor noise pollution,from the modal analysis of the high-speed composite transmission press under the state of preload and full-preload.Therefore,with reasonable dynamic parameters,the high-speed composite transmission press meets the design requirements.