VARIABLE TRIBOLOGICAL CONDITIONS ON THE BLANK HOLDER AS SIGNIFICANT FACTOR IN DEEP DRAWING PROCESS

Abstract

Friction on the work part flange very significantly influences the deep drawing process. Blank holding force (BHF) is normal force for that friction. Presented in the paper are short review of analysis of for type variable BHF (VBHF) influence during the process. The experimental researches were performed on a special laboratory computer device. Realized are pure deep drawing process (drawing ratio 2) of the Al−alloy sheet metal, with dry surfaces. Influence of VBHF monitored mainly through thinning strain distributions and drawing depth. After performed experiments we can conclude that some type of VBHF are important factor for advancing deep drawing process.