Study On Springback Control Of Multi-Corner Body Parts And Synchronous Engineering Technology

Sheet metal stamping forming has an important position in the industry,it is widely applied in automotive,aviation,ship and other fields.Metal is an elastoplastic material,due to insufficient plastic forming,springback is inevitable,it has become the difficult problem and key issue in sheet metal forming research.In recent years,high-strength steel board has been widely used in the automotive industry,High strength steel has the characteristics of high yield strength and poor formability,therefore,the springback is generally more serious than ordinary steel,in many complex body parts,springback is difficulty to control,springback affecting the car assembly,appearance and quality.How to choose the good structural parameters according to the characteristics of the body parts,and design a reasonable part structure so that the springback of the parts during the stamping forming can be reduced without affecting the function of the parts is a research route of springback control.The study of this paper is a method of springback control of complex parts in the synchronous engineering of body development.Body development synchronous engineering is to consider the stamping production formability and manufacturing process when the body parts design.Body development synchronous engineering can save time of the process adjustment and die compensation,improve production efficiency and save production costs.Reasonable part structure plays an important role in the formability of parts.Consider the factors of forming process,this paper focuses on the study of springback factors from the structural aspect.Through the optimization study,the optimal structural parameters are combined and the springback of parts are reduced.This paper first introduces the finite element simulation technology of stamping,and then narrated the process of establishing the finite element simulation model in AutoForm.This paper select the channel as the springback optimazation part.Three factors are selected from the aspects of the structure of the parts,and two factors are selected from the aspects of the stamping process.The box-Behnken is used to construct 41 sets of experiments,and AutoForm is used to the simulation is carried calculate the springback through stamping simulation.Research the impact of each factor on the springback.Then,according to the springback calculation results of the test samples,the response surface approximation model is established.Finally,Downhill Simplex algorithm is used to calculate the minimum springback point of the approximate model,and the combination of the minimum impact factors is obtained.After simulation verification,The results show that the springback of simulation test is similar to that of the approximation model,which shows that the method can optimize the springback of parts in the synchronous engineering of body development.The article has a certain inspiration for the study of the springback control.