STABILIZATION OF RESIDUAL STRESSES IN WELDED STRUCTURES OF PRESSES BY PULSE UNLOADING BEFORE VIBRATION

Summary: This study focuses on the stabilization of residual stresses in welded structures of presses through pulse unloading prior to vibration treatment. Residual stresses in welded components can compromise structural integrity, reduce fatigue life, and lead to premature failure. The proposed approach involves applying controlled pulse unloading to redistribute and stabilize stress fields, creating a more uniform stress state before subjecting the structure to vibration. Experimental and analytical results demonstrate that the combination of pulse unloading, and vibration treatment significantly reduces peak residual stresses and improves the mechanical properties of welded assemblies. This method provides an efficient solution for enhancing the durability and performance of welded structures in industrial applications. The influence of various stabilizing treatments on the properties of steel welded samples is investigated. The efficiency of the vibration method with pulsed unloading for reducing the level of residual stresses in samples by 1.3-2.3 times and ensuring their geometric stability is demonstrated.