The jaw plate is the component that directly contacts the material when the jaw crusher is working. During the process of crushing materials, the crushing teeth on the jaw plate are constantly squeezed, grinded, and impacted by the materials. The large impact load and severe wear cause the jaw plate to become an easily worn part in the jaw crushing process. Once the loss reaches a certain level, phenomena such as increased power consumption will occur. Replacing a failed jaw plate means shutting down the machine or even shutting down the entire production line for maintenance. Frequent replacement of the jaw plate will directly affect the production efficiency and economic benefits of the enterprise. Therefore, understanding the factors that affect the wear of the jaw plate of the jaw crusher and extending its service life are issues that many jaw crusher users are very concerned about.
The design and material selection of the jaw crusher are the basis for the service life of the jaw plate.
When designing the jaw plate:
1. The tooth peaks and tooth valleys between the movable and fixed jaw plates should be opposite to ensure that in addition to exerting corresponding squeezing force on the material during operation, the jaw plate can also exert a certain bending stress to improve the crushing capacity of the jaw crusher. .
2. For small and medium-sized jaw crushers, in order to extend the service life of the jaw plate, the jaw plate can be designed into an upper and lower symmetrical shape, so that it can be turned around when the lower part is severely worn.
3. For large jaw crushers, the jaw plates can be designed into several symmetrical pieces, so that the wear blocks can be easily replaced and the service life of the jaw plates can be extended.
When selecting jaw plate materials:
Mn13Cr2 can be used as the main material in material selection. This kind of manganese steel has strong toughness. Although its hardness is reduced, it itself has the characteristics of cold work hardening. When the jaw crusher crushing plate is working, the extrusion force it bears makes it work. It is continuously extruded and hardened during the process, so that it can be hardened while being worn until it is worn beyond the service limit before being scrapped. In addition, other factors such as cost should also be taken into consideration when selecting materials.
Attention when assembling the jaw plate:
The assembly of the jaw plate has a great impact on its service life. When assembling the jaw plate, it is necessary to firmly fix the jaw plate on the movable jaw and fixed jaw, and use copper sheet, lead, zinc, etc. to maintain the same parallelism between the movable jaw plate and the fixed jaw plate. This is to avoid the relative sliding between the jaw plate and the movable and fixed jaws during the operation of the jaw crusher, causing wear or breakage of the jaw plate and thus reducing the service life of the jaw plate of the jaw crusher.
Appropriate improvements in the use of jaw plates:
During the working process of the jaw crusher, the material is in direct contact with the jaw plate, and the jaw plate bears large crushing pressure, especially for some materials with higher hardness. The strong force will cause the mounting bolts of the jaw plate to become loose due to vibration, thereby aggravating the wear of the jaw plate and even falling off or breaking.
When this situation occurs, the problem cannot be solved by simply tightening the fastening bolts of the jaw plate before starting the jaw crusher. It is necessary to find out the reasons for the loosening and falling off of the crushing plate during the working process of the jaw crusher. Conduct detailed analysis and adopt practical methods to solve them. For example, springs can be added to the fixing bolts to improve the anti-loosening and vibration damping capabilities of the jaw plate fixing bolts, extend the service life of the jaw plate, and improve the production efficiency and economic benefits of the jaw crusher.
Shanvim as a global supplier of crusher wearing parts, we manufacture cone crusher wearing parts for different brands of crushers. We have more than 20 years of history in the field of CRUSHER WEAR PARTS. Since 2010, we have exported to America, Europe, Africa and other countries in the world.
Post time: Apr-18-2024