PROCESS STABILITY PREDICTION OF HOT FORGING OF P4 CRANKSHAFT FORGINGS WITH UNTREATED COUNTERWEIGHTS

In order to meet the customer requirements, criteria for sufficient stability of the production process of P4 crankshaft forgings with untreated counterweights for controllling unbalance dispersion values depending on the key parameters of a forging (KPF) and the hot die forging (HBI) process have been established. A method for predicting the stability of the hot forging process of P4 crankshaft forgings with untreated counterweights using a non-linear model describing the key characteristic of the forging («crookedness») was developed. The control method of the unbalance dispersion of the forging depending on its KPF was tested at the forging shop. A methodological basis with respect to numerical analysis and prediction of balancing the forgings was developed.