Jaw crusher working principle is movable jaw and fixed jaw by the working chamber constituted composition, movable jaw and fixed jaw under enormous crushing force and friction materials, easy to wear out, in order to protect the jaw, generally in the movable jaw and fixed jaw surface mount wear liner, this liner is also known as broken boards. The board surface is usually made of broken tooth, tooth peak point of the broken plate 90 to 120, the size of the material to be broken depending on the nature and degree of the block, crushing bulk materials, the angle to be bigger; crushed small pieces of material , the angle can be smaller. Pitch depends on the product particle size, usually taken in the discharge port is approximately equal to the width of the tooth and the tooth height ratio of preferably from 1/2 to 1/3.Strengthen Jaw Crusher broken plate life from design, material selection, assembly and use of the process improvements and other considerations.

Jaw crusher - jaw plate - crusher hammers

1, jaw crusher design, material selection
At design time, the movable jaw and fixed jaw plate should be broken tooth-to-tooth peaks valley. Thus, the crushing of the material in addition to the compression, there is bending, the material relatively easily broken. In order to enhance the life of broken plates, small and medium crusher broken into upper and lower board design symmetrical shape, the moment can turn around and use the Ministry of wear and tear; large jaw crusher crushing plates designed to mutually symmetrical pieces, so that can be worn the broken plate replacement use.Manganese steel toughness, hardness, though not high (about 210 HB), however, because with work hardening characteristics, under pressure will continue to be strengthened, it is constantly at work wear and continue to strengthen until it can not be worn to use only scrapped. Manganese broken plate after casting tough to pass water treatment, water toughening treatment operation is substantially the same as quenching, that is out of the manganese steel casting broken plate heated to 1 000 ~ 1 100 ℃ after rapid cooling in water. Water treatment can be tough uniform microstructure, the microstructure and to be fixed, avoiding the use of phase transformation occurs naturally leaving the performance deteriorated. Manganese drawback is expensive, but the service life, cost and other aspects of general considerations, ZGMn13 than white cast iron long life, and low cost.Crushing board material can choose white cast iron. White cast iron greater hardness, good wear resistance, the source is easy and inexpensive; drawback is brittle, easily broken, life is short. In order to improve the life of the broken plate, manganese material is better than 12% of manganese, is used ZGMn13.

2, jaw crusher assembly
When assembling, broken plate must be firmly attached to the jaw plate pad level should be between the two, broken jaw plate and between the use of soft metals (such as lead, zinc, etc.) as a gasket, and bolted. Crusher work, there should be no Crushing plate loosening, or easily broken or worn broken plate, reducing the life of Crushing plates. Therefore, the assembly must be installed broken plate, thus extending the life of Crushing plates.

3, jaw crusher during use in order to strengthen the life of broken plate
In the production process, the broken plate and the material directly, breaking force is large, especially the greater hardness of the material is Crushing, resulting in broken plate mounting bolts vibration, nut loose, the broken plate wear and tear and have a great noise, severe broken plate or break off the equipment downtime, affecting the normal production. In such cases, just before starting Tighten bolts and nuts are not completely solve the problem, according to the actual situation in the field to analyze specific issues, try to take a practical approach to solve the problem. For example, you can use a spring damping device locking plate at work to solve Crushing loose, thus extending the life of Crushing plates, improve work efficiency. Specifically, the use of a spring made of screws against loosening from the clamping device, which device consists of gland inner spring, springs, outer spring gland composition, the wear this device tighten the nut on the bolt, the spring is compressed to a certain extent the nut after a very strong vibration effects, the crushing force generated by the huge bolts loose spring tension force is automatically compensate, so Buzhi Yu bolts loose, thus extending the life of Crushing plates, improve production efficiency. In short, the process can be used for specific situations to find ways to solve specific problems, to prevent broken plate loosening, wear and tear, break, etc., thus extending the life of Crushing plates, reduce costs and improve efficiency.

4, Conclusion
Strengthen jaw broken broken plate life from design selection, assembly, use process improvement and other aspects, can well strengthen the jaw broken broken plate life, which increases jaw crusher production efficiency, reduce production costs.

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