The jaw crusher is one of the main mine crushing machinery. Due to the poor working environment, the frame of the jaw crusher may crack. Great Wall Casting (CHAENG) believes that this situation can not be ignored and should be solved and repaired as soon as possible. Many enterprises often ignore these problems, resulting in greater problems.

Jaw crusher frame repair generally has the following three methods:

1) Restraint stress

The main weld structure of the jaw crusher frame is closed weld, and the welding sequence adopts straight through welding, resulting in large welding stress and restraint stress.

2) Welding rod drying

Since manual arc welding is used for the welding of jaw crusher frames, it is required to dry the welding rod before welding.

When most enterprises dry the welding rod, the drying temperature is only about 200 ℃, so the water adsorbed in the welding rod coating and the crystal water in the coating composition cannot be removed, which increases the tendency of pores and cracks caused by water.

Therefore, it is recommended that the welding rod of great wall cast steel should be dried at 300 - 400 ℃ for 2 hours before welding, and it should be taken at any time.

3) Weldment cleaning

Most enterprises do not strictly implement the process in the actual welding process, which increases the tendency of pores and cracks.

The welding rod is sensitive to water, oxide scale, rust, and oil stain on the surface of the weldment. Therefore, in order to prevent pores, it is required to strictly clean the surface of the weldment.

If you need to replace the jaw crusher frame, welcome to consult us. The crusher frames by CHAENG have strong impact resistance and good quality, which can avoid cracks to a great extent.