Crank throw forming and forging process

Abstract

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.

Description

technical field [0001] The invention relates to a crank throw forging, in particular to a crank throw forming and forging process, which belongs to the technical field of forging. Background technique [0002] The crankshaft is an important part on the crankshaft. Because the crankshaft undertakes the transformation of mechanical rotation and reciprocating motion, the crankshaft of a large crankshaft bears large and complicated forces, so it must have sufficient rigidity, strength and ability to withstand impact loads. In order to meet the above For performance requirements, forged crank throws are usually used, and the most important process in the process of forging crank throws is to meet the forging ratio and reduce the number of forging fires. The current forging method has the following disadvantages: first, due to the complicated forging operation process, multiple fires are required to form the shape; The cost is high, so it is necessary to optimize and improve the ...

AI Technical Summary

Problems solved by technology

The current forging method has the following disadvantages: first, due to the complicated forging operation process, multiple fires are required to form the shape; The cost is high, so it is necessary to optimize and improve the traditional forging process

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