Round spring, because of its geometric shape, it is harder to strengthen than flat leaf spring. Evaluate the strengthening effect of the cross section of the round spring, so as to fully understand the resistance of the round spring against fatigue fracture.
For leaf spring strengthening, a continuous-through shot blasting equipment can be used to strengthen the leaf springs one by one, exposing the geometric concave surface of the leaf spring to the high-speed shot flow. A typical model includes a throwing head to project the top of the leaf spring, and a throwing head is installed on the side to spray the left and right sides of the leaf spring at the same time.
Shot/shot peening is the most effective strengthening method for suspension springs. After proper shot peening, the fatigue life of high-stress springs can be increased by more than 5 times. Currently, most of the suspension springs are shot/shot blasted using steel wire cut blasting. Shot peening (different pellet diameters) is commonly used. This way of rotation allows the high-speed pill to pass between the rings of the circular spring smoothly and hit the metal surface of the inner ring, where the stress of the circular spring is most concentrated. The equipment’s capacity can reach 500 pieces/hour. Experiments have confirmed that stress strengthening can further extend the service life of leaf springs than conventional strengthening. The strength and depth of the spring surface compressive stress are important indicators to measure the effect of shot peening.
In the strengthening process, it is simulated that the leaf spring will be subjected to “stress strengthening” in the future use process, so that it will be shot peened while applying a “static stress” in the direction of bearing the load. A typical model includes a throwing head to project the top of the leaf spring, and a throwing head is installed on the side to spray the left and right sides of the leaf spring at the same time.
The parts must be in three shot blasting positions, and three rounds of shot blasting strengthening treatment are performed according to the set time.