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Optimization of Shot-Peening Conditions and Wave Profiles to Improve Durability of Wave Cushion Spring

This study presents a determination procedure of optimal shot-peening process conditions, wave profiles and thickness in order to precisely control and improve durability and fatigue life of wave cushion springs assembled into automobile automatic transmission clutch. For this shot-peening process, residual stress analysis was applied under various conditions. Experimental works were conducted to evaluate proposed approach by using X-ray diffraction residual stress measurement tester. It could be expected that this study provided guideline for wave spring optimal design and improving fatigue life.