Paper Title
EXPERIMENTAL INVESTIGATION AND SIMULATION OF THE EFFECT OF FRICTION CHANGES IN THE DEEP DRAWING PROCESS OF THE FRONT SHELL PIECE OF THE PEUGEOT BRAKE BOOSTER

Abstract
Abstract – Hydro forming of sheet metal is one of the most important methods of sheet metal forming, which is used to change the shape of metal sheets and convert them into hollow parts that have various applications in different industries, especially in the automotive industry. The deep drawing hydroforming method is a type of deep drawing method in which a pressurized fluid is used as the deformable medium. The uniform thickness distribution is the most important feature of this process compared to traditional drawing. Better surface quality and higher stretching ratio are among the other features of this process. The purpose of this article is to investigate the effect of the friction coefficient on the thickness distribution of the front shell piece of the Peugeot 405 brake booster, which is produced with St14 steel sheet with a thickness of 0.8 mm. The maximum force required for forming is also investigated. The results show that with an increase in friction up to the optimum value of 0.15, the thickness distribution improves and after that, we observe a decrease in thickness in critical areas of the part with an increase in friction. Changes in the friction coefficient do not affect the maximum forming force, which is an important process parameter in mass production