The Finite Element Analysis And Optimizing Design For The Frame Of Multi-point Forming Press

To achieve three-dimensional surface for the manufacturing of fast,high-quality, low cost, to adapt to modern manufacturing product marketcompetition needs update with computer technology and flexible tools for sheetmetal forming is the digital technology of modern sheet metal forming importantdevelopment trend in the flexible molding, multi-point into an advanced form ofsheet metal forming technology.Multi-point forming's basic idea is the traditional arrangement of the wholemold into a series of discrete rules, the basic body height adjustable by computercontrol the height of the basic body shape required for the formation of envelope,instead of the traditional mold for a whole sheet of the overall three-dimensionalsurface shape, no film sheet in order to achieve fast, flexible form. It can not onlysave a lot of mold manufacturing costs, but also solve one-piece, small batchparts production problems.Multi-point forming technology mainly consist of the CAD system, computercontrol system and mechanical system three major components. Mechanicalpart is the main body. Which is to achieve multi-point forming key part. It includesthe rack, elements group, and adjusting basic body shape system. Rack playsthe most important parts of the fixed and supporting other components, it is alsothe basis for targeting other components installed in the work under load. Framestrength, rigidity, reliability and stability of the performance of its important rolepresses, forming a direct impact on the quality of work, so the structure ofmulti-point forming rack finite element analysis and optimization is critical.This research is as follows:1)The research of multi-point forming technology and finite elementoptimization technology Introduces the multi-point forming technology and multi-point overview ofthe working principle of press molding, detailed finite element analysis andoptimal design of the basic theory and discussion of the finite element erroranalysis and control methods.2) The founding of multi- point forming presses modelFinite element analysis and optimization of the prerequisite is to establish areasonable three-dimensional model. First, application of CAD software tomulti-point forming presses, rack structure and simplified the design of the model,the model into finite element analysis software PATRAN pre-treatment in thenetwork and the constraints set by, for later analysis of the structure to do Goodpre-treatment work.3) Static Analysis on the rack and modalRack of multi-point forming presses were analyzed and Motel static analysis,the binding of the vibration modes and deformation results. The results showthat the first and second frame deformation modes do not, the deformation ismainly reflected in the column of the swing, the role of the anchor bolts to thefixed base table does not move, while the upper beam to move along with thecolumn; Order modes around the Z axis frame as a whole began to reverse,because of the fixed table remain fixed, the amplitude increases from the bottomup; fifth-order modes under the side table and column rotation is not obvious, butmore on the beam rotation rate large; seven frequency bands appear concavebody phenomenon in the table. Deformation of the table, the table will cause thenext connected to the basic body punch tilt phenomenon, which will reduce thelife of the punch.4) the PATRAN-based finite element optimizationPATRAN software used on the beams of the rack components andcomponents table a reasonable optimization. Obtained from the analysis ofoptimization, the optimized multi-point multi-beam forming presses reduce thetotal weight of 35.2KG. Fell 8.6%, the nodes on the beam on the boardsignificantly reduced the maximum stress is 86Mpa. Presses on the beamquality components to reduce the circumstances, a certain stress and deflectionincrease. The table the total weight of components optimized to reduce the 22.2KG, down 5.2%, the table panels at the maximum stress value 69.1Mpa,79.6Mpa significantly reduced than before, optimizing the overall strength of thecomponent after the table has increased. Overall, the press table assembly onthe beam components and the optimization is successful.