TR process for forging heavy crankshafts

Abstract

TR forging process for heavy crankshafts was a breakthrough in forging technology. In the first design connecting rods with joints, which transferred vertical force of the press into two horizontal forces, were applied. The modified process combines upsetting along the shaft axis with bending of the arm. In the former stage of the process a volume of the material satisfactory to form various shapes of arms is gathered. The task of the latter stage of the process was to forge the arm. Therefore, this innovative process allowed efficient forging of a variety of crankshafts. General idea of the process is described in the paper. Numerical simulations were applied to design the best forging technology.