As the main working part of the jaw crusher for crushing materials, the jaw plate is relatively easy to wear. In order to stabilize the equipment and put it into production normally, it needs to be repaired and replaced regularly. It can be seen from the analysis that the wear of jaw plate belongs to cutting wear. The causes and solutions of this wear are as follows:
Reasons for wear of jaw plate:
1. The material slides and rubs against the die plate in a short distance, and the friction cuts the die plate to form debris, resulting in the wear of the die plate.
2. Repeated extrusion of materials causes local fracturing or overturning of the materials on the surface of the jaw plate, and the cracked or overturned parts fall off with the materials impacted by extrusion, forming debris.
3. The material repeatedly extrudes and cuts the jaw plate, and small cracks are formed on the surface of the jaw plate or at the root of the protruding part of the jaw plate. These small cracks continue to expand to connect, causing the material on the surface of the jaw plate to fall off and form debris.
Repair method for wear of jaw plate:
1. The newly installed jaw plate must be firmly fixed, installed and in stable contact with the surface of the machine.
2. During the working process, pay attention to the normal operation of the crusher before starting feeding.
3. The crushed material should be evenly added into the crushing chamber, and the side feeding or excessive filling should be avoided to prevent unilateral overload or overload.
4. Under normal conditions, the temperature rise of the bearing shall not exceed 35 ° C, and the higher temperature shall not exceed 70 ° C. if it exceeds 70 ° C, the machine shall be shut down immediately to find out the cause and eliminate it.
5. Before shutdown, the feeding work shall be stopped first, and the machine can be stopped only after the crushed materials in the crushing chamber are completely discharged.
6. Select materials with high hardness to resist extrusion and materials with enough toughness to resist chiseling impact.
7. The structure of jaw plate is improved to reduce the relative sliding between material and die plate and reduce friction.
According to the above reasons and solutions for the wear of jaw plate of jaw crusher, the jaw plate must be made of materials with high hardness, wear resistance and strong resistance. Cement enterprises with mine crushing production line technology can exchange the same type of wear jaw plates of mine coarse crushing and cement fine crushing, so as to extend the service life of tooth plates and bring practical economic benefits to customers.
