The invention relates to a
crank throw forming
forging process which comprises a
forging machine, a
manipulator, an anvil replacing die, a reverse buckling bending die, a core die, an upper anvil, a lower anvil, a
workbench and a forged piece. Firstly, a prefabricated
forge piece with a boss arranged in the middle is pressed to be thin and drawn out, then a male die, a trapezoidal die and a female die are arranged below the boss, a concave anvil replacing die and an arc anvil replacing die are arranged above the boss, multi-angle left-right moving and overturning
forging is conducted on the boss, forging of a curved neck cylindrical blank is completed, then reverse forging bending is conducted through a reverse buckling bending die, and the curved neck cylindrical blank is formed. And two wings of the prefabricated
forge piece are bent and folded together, then a series of core molds with different thickness differences at the two ends are used for pressing, meanwhile, the boss head is forged into the quadrangular
crank throw head, and finally the
crank throw
forge piece is finished to the set size. The forging die has the advantages of being good in forming degree, small in
machining allowance, short in forging time, small in material loss and low in production cost.