Various forging defects often occur in the production process of forged cranks, which increase manufacturing costs, reduce forging quality, batch quality problems, and even lead to batch scrapping.
The deformation of the forged crankshaft balance weight is due to the significant change in the axial size of the balance weight. After the machine is added, the thickness of the balance weight is uneven, which is easy to cause the problem of unable to move and balance. This obvious deformation mainly occurs in the cutting process. Due to the excessive cutting force, the cutting force on both sides is unbalanced. Timely repair or replace the cutting die; Control excessive cutting; Such problems can be effectively avoided by taking measures such as staged cutting.
There are many forging defects in the production of forged cranks. The forming mechanism, solutions or preventive measures of the defects are briefly introduced. It can be used as a reference for crankshaft die forging process design and practical problem solving.