چکیده مقاله
Hole flanges are important functional elements in many sheet metal parts They provide stiffness, allow for positioning and fixation, they guide cables etc Hole flanging operations in sheet metal parts are typically performed using dedicated tooling Recent publications proved that hole flanging by incremental sheet forming i e incremental hole flanging is an interesting alternative to the traditional operations with dedicated tools In incremental hole flanging, limit hole expansion ratios of up to 4 were observed which are much larger than the typical expansion ratios of around 2 Conventional hole flanging is a forming process used to manufacture circular or asymmetric flanges In this process, a holed sheet, rigidly fix to a die with a blank holder, is plastically deformed mainly by bending and circumferential stretching with a punch In hole flanging a flat sheet with a pre cut hole is formed by deep drawing process which produce progressively produces whit a smooth, round flanged lip The theoretical analysis of flanging process of circular holes in thin plates taking into account the interconnected changes of a thickness and deformation hardening is carried out Possibility of definition of current values of strains in non stationary processes of forming is shown In process of flanging the co ordinate of the material element differentiating area of compression and a stretching in radial direction is defined
کلیدواژهها
نویسندگان
Najmeddin Arab
Department of Material ScienceResearch Center, Branch of Saveh, Islamic Azad University, Saveh, Iran
شیوه ارجاع
Arab, Najmeddin,1399,Analysis of Thin Sheets Deformation with Circular Holes at Flanging Process,17th National Conference and 6th International Conference on Manufacturing Engineering,Tehran
ارائهشده در
مجموعه مقالات هفدهمین همایش ملی و ششمین کنفرانس بین المللی مهندسی ساخت و تولید12 اسفند 1399 · تهران