According to the principle of kinematics, the test proves that: a steel part that performs compression and extension motion, when the frequency of motion increases, the temperature of the steel part increases, the strength decreases, and the stress concentration point appears in the stress concentration point and gradually expands and deepens, until the fatigue limit is reached. It will be damaged. The same is true for leaf springs, except that they have higher elasticity and are more durable than ordinary steel parts. In addition to other reasons, the main reason for leaf spring fracture is poor lubrication. Drivers and technical management personnel should pay attention to the lubrication of leaf springs in time. In order to reduce the friction and dispersion stress, to prevent the surface of the steel sheet from straining; to reduce the intrusion of dust, soil and water, to prevent rust; and to reduce the heat dissipation and temperature to prevent the elastic strength from falling.
The general lubrication method is: the new car should be carried out at the end of the running-in period, and it should be carried out when the car is used in summer and winter. During the lubrication operation, first remove the leaf spring, open the center through bolts to disperse the steel sheet, and then evenly apply lithium-based grease or graphite grease on both sides of the steel sheet to form an oil film between the two friction surfaces (It takes only time to replace a piece of piece to complete the lubrication of a set of leaf springs).
