The Finite Element Analysis And Optimization Design For The 12000KN Numerical Control Fine Blanking Press Frame

Fine blanking press is the basic means of implementation of fine blanking technology.Its performance,especially deformation of the frame,will directly affect the part quality and tool life,the resistant-bias loading of the frame affect the upper and lower die checking the center and the precision of the parts,the frame bore huge work load and high speed stamping frequency,therefore,the stiffness of the frame needs very well.The design of large tonnage forging equipment are generally overweight,so the light weight design of the frame is essential.In this paper,on basis of the principle of fine blanking,and according to the stress situation of the press frame and the structural requirements of fine blanking press,3D models of the main components were created by 3D Pro/E.Then the parts were assembled and the virtual design of the fine blanking presses were completed.The finite element analysis software Hyper works was used to analyze the frame's property when 12000 KN full loads and the eccentric loads were imposed,respectively.And the frame's stiffness and strength under full loads and tilt amount under the eccentric loads were all meeting the requirements,then from the Sensitivity analysis to the stiffness,the resistant-bias loading the frame weight,we can know which steel plate affect the property of the frame most.The upper workbench and annular plate bear huge impact load under the full load,therefore the deformation is very large.Filling this location,import it to Hyperworks and do the topological optimization,we can simplify the structure of the frame.Firstly,the laws of plates thickness at each position effected on frame's tilt amount,stiffness,quality were studied.Combined with the results and frame's strain contour,five main influencing factors were selected to design orthogonal test,and the optimized plates thickness is verified by simulation.Finally,based on the optimization method of Taguchi orthogonal experimental design and FE numerical simulations,selected the thickness of the vertical plate,plate,side panel,upper workbench,lower workbench as optimization targets,the main factors affecting various optimization goals have been determined by S/N comparison and analysis of variance,and the process parameters combination has also been achieved through multiple objective optimization with linear weighted means to obtain the fine blanking press frame with the best comprehensive properties.Through the optimization analysis,a simple distribution of thick plate instead of complicated annular plate,the frame's mass decreases at the same time the resistant-bias loading of the frame meeting the requirements,the frame stiffness increases.It can lay the foundation for the design of fine-blanking press frame.