Research And Finite Element Analysis On CNC Bending Forming Equipment Of Sheet Metal

With the rapid development of railway transportation, the important role of railwaypassenger car has become increasingly prominent, the parts manufacturing technology hasbeen paid more and more attention. At present, the bogie cover parts of railway passenger carare mainly formed by bending die and bending machine in China. This method not only hashigher manufacturing cost, but also waste the raw materials. At the same time, due to thereplacement of the mold in the process of processing, it makes productivity lower.Accordingly, this research will develop a new type of CNC bending forming equipment ofsheet metal. It integrates the sheet metal forming with different bending angle into one set ofequipment, which simplifies the sheet metal bending process. Compared with the traditionalbending die, the forming equipment with the adjustable bending angle has many advantages.And with the development of railway transportation industry and the growing shortage of theenergy, the bending forming equipment will have a broad application prospects anddevelopment potential. Believe that the research on this subject is of great significance to thedevelopment of railway vehicle technology. At the same time, it will bring certain economicand social benefits, which has the vital significance to the actual production.In this paper, the computer simulation technology and FEM are applied to the design ofthe sheet metal forming equipment. The author use CATIA to design and simulate thestructure of the bending forming equipment of sheet metal, and the DEFORM software isused for the forming process of the bogie plate with its finite element analysis. Computersimulation and finite element analysis can predict various aspects of performance indexes ofthe forming equipment in a real working environment. Besides, the method can also simulatethe movement of the mechanical mechanism and the deformation of the mechanical parts,etc.The main purpose of the FEM is to optimize the structure design of the device, thus toimprove its working performance and provide the basis and guidance for the design. The main work and research contents of this paper are as follows:1. To determine the whole design scheme of the sheet metal forming equipment, anddesign the mechanical structure of the components at the same time.2. To determine the transmission device of the sheet metal forming equipment. And themain components of the hydraulic drive system, which include hydraulic cylinder, hydraulicpump and drive motor, and the main components of the ball screw and guide-way system,which contain ball screw, guide-way and servo motor, are chosen by detailed type selectioncalculation.3. Using CATIA to show the virtual assembly, interference checking and kinematicssimulation of the motion process of the sheet metal forming equipment.4. Conducting finite element simulation on the forming process of the bogie cover plate.Doing some research on the metal flowing law and the stress and strain distribution in theforming process of the sheet metal, thus to determine the stress concentration zone. Gettingthe maximum pressure needed in the forming process of the sheet metal through theobservation and analysis of the "load-stroke curve" of the forming die, thus to verify therationality of the structure design of the hydraulic cylinder and hydraulic pump. Confirmingthe design plan according to all the numerical simulation results got above.A new forming equipment and technology of the sheet metal is developed in this paper.And through the kinematic simulation of the forming equipment and the finite elementanalysis of the forming process, we get a lot of valuable process parameters. The researchprovides certain theoretical basis for the practical production.