Estimation of fatigue life for mechanical compensation mechanism in press brake

The bending process of some model mechanical compensation mechanism has been simulated by use of three-D elastic contact finite unit method in the text. The maximum contact stress of the mechanism during bending process has been obtained. By putting the maximum contact stress into the S-N fatigue life equation, the fatigue life has been calculated. The results show that the fatigue life of this mechanism can satisfy the design requirement and agree with the test result well, which provides reference for estimation and check of fatigue life of the compensation mechanism for press brake.