Structural Analysis And Topology Optimization Of Stamping Punch For High Strength Steel Beams

With the continuous development of the automotive industry,vehicle safety and fuel consumption are often the key targets for consumers to choose a car.As a result,these needs have become the driving force for R&D units and manufacturers to develop stronger and lighter body.With the progress of material science,especially the development of various alloy materials,high-strength steel and aluminum alloy have become the first choice of manufacturers.The first thing to bear is that high strength steel plate,because its price is lower than that of aluminum alloy,for small and medium-sized car enterprises,it can more effectively weigh the cost and performance.Therefore,high-strength steel parts are increasingly used in body structure.This trend makes the center of stamping process and mold design transferred from the general plate to the high strength steel plate.Although with the development of many years,the level of high strength steel sheet stamping technology has been improved and the technological technology is more and more mature.High strength steel has a higher strength of steel than ordinary steel.Because of its higher yield and tensile strength,a lot of higher forming force and uncertainty are produced in the stamping process.These properties will lead to more structural risk of the die itself.Therefore,the development needle is very important for the design method of high strength steel stamping die.In the future,more reasonable mold structure can be studied more appropriately in the stamping die market,and it becomes the key point of the development of the die supplier.In this paper,the punch punch of two different types of high strength steel beams is taken as the research object.Through the corresponding stamping parameters setting and the finite element model processing in Hypermesh,the finite element simulation model of the elastic body of the punch punch of the high strength steel beam is established,and the dynamic simulation model is calculated by LS-Dyna.Solution.On the basis of verifying the rationality of the stamping process of the parts,through the mechanical analysis of the die structure and the topology optimization technology of the structure,the structure of the punch is reconstructed.The optimized die has achieved a certain weight reduction,and the rigidity of the die is also improved.The optimized model is verified by the fatigue test under the high requency stamping load,which proves the reasonableness of the optimized structure and the feasibility of the optimization method.On the basis of the optimized structure of punching punch of high strength steel beam,combining the characteristics of plate itself and stamping process,it is pointed out that this kind of slit punching punch should be targeted to determine the direction of structure strengthening when the design is optimized,and a new design criterion for punching die for such parts is obtained.These ideas and methods of optimization design will play a guiding role in the design of high strength rigid stamping die to a certain extent.