How to prevent the defect and fracture of self-aligning roller bearing ring

1. First of all, strictly control the raw materials for the manufacture of self-aligning roller bearings, especially the brittle elements, carbide precipitation, reticulation, banding and other factors contained in the raw materials must be eliminated during processing. If these factors are not eliminated, they will cause stress concentration, slowly wear down the basic strength of the ring, and in serious cases will cause the ring of self-aligning roller bearings to directly break. Here, the manufacturer of self-aligning roller bearing recommends that you purchase stable and reliable steel as much as possible, and regularly check the warehousing of steel, and control it from the source, so as to better ensure the later use.

2. In the production process of self-aligning roller bearings, if problems such as overburning, overheating and internal cracking occur, it is generally due to the unstable control of temperature during the forging process, resulting in the reduction of the toughness and strength of the ring. Therefore, in order to avoid and prevent such things, it is necessary to strictly control the processing temperature, circulating heating and heat dissipation conditions after forging, The manufacturer of self-aligning roller bearing recommends that spray cooling can be used for heat dissipation, especially for large self-aligning roller bearing rings. Here, the temperature should be controlled above 700 ℃ as far as possible, and no objects should be stored around.

3. Heat treatment is a very important link in the processing process. Here, we should pay attention to the reliability of the testing equipment. We must do a good job of inspection in advance before processing. During the testing, we should strictly test to ensure the reliability of the measured data, and also put an end to false records and randomness. This is also because the whole heat treatment process guarantees the quality of the centering roller out of the ferrule. In addition to inspection, the quenching process conditions should also be further improved. This is to solve the defects of large self-aligning roller bearing rings. The composition and properties of quenching oil should be determined in advance. It should be used in strict accordance with the requirements, and the quenching conditions should be improved by replacing the enhanced quenching medium with rapid quenching oil.

4. For the finished self-aligning roller bearing ring, grinding burns and cracks are not allowed, especially on the fitting surface of the inner ring taper. Therefore, it is necessary to strictly check the defective products after pickling, and some serious burns that cannot be repaired should be immediately scrapped. Never put the burnt ring into the equipment.

5. There are strict standards for the identification of self-aligning roller bearings. When the purchased steel is put into storage, it is necessary to strictly distinguish between GCr15 and GCr15SiMn materials and products.