Optimization of forming process for transiting part of combustion chamber

In deep drawing, one of the sheet metal forming processes is a widely used technique for producing parts from sheet metal blanks in a variety of fields such as aerospace and automobile. Predicting the behaviors of deformation during a forming process is one of the main challenges in cold forming. Instead of the traditional method called trial and error process, numerical simulation based on finite element analysis method could be used to achieve a better understanding of forming deformation during the process and to predict tools for several failure modes to reduce the number of costly experimental verification tests. In this paper, optimization of forming process for transiting part of combustion chamber is mainly performed by ABAQUS software. The numerical simulation model was constructed by CAD software. This part structure is very complex and the defects such as wrinkles and springback occur during forming. The present research work is aimed at avoiding the wrinkles. Using numerical simulation technology, the influences of friction coefficient and blankholder force in wrinkle have been investigated and optimized values for these two important process parameters are suggested in order to eliminate wrinkles. Moreover two criterions for fracture (FLD criterion and reduction of thickness criterion) are briefly presented.