Prediction of service life and failure probability of cold forging tools

Tools systems for the production of cold forged parts, especially for parts with net-shape or near-net-shape attributes, can be denoted as extremely h igh stressed technical components. Due to this circumstance they often fail by fatigue crack initiation in surface areas, which are characterised by h igh load levels. Therefore, the primary goal of this publication is to pres ent a methodology for the lifetime calculation of cold forging tools. Besid e the principle demand - the improvement of the prediction accuracy - a so- called stochastic-deterministic method enables it to trace back the stochas tic lifetime characteristics to the scatter of the primary parameters of in fluence and the fatigue properties of the tool material.