In the bearing industry, ring fracture is not only a quality problem of spherical roller bearings, but also one of the quality problems of all types of bearings. It is also the main form of bearing ring fracture. The reason is mainly related to the raw materials of the bearing. The relationship, coupled with the improper operation in the later stage, will cause problems such as ferrule breakage during the operation of the equipment. How to prevent it? Let's take a look together:
1. First of all, strictly control the raw materials for the manufacture of spherical roller bearings, especially during processing, we must eliminate the brittle elements, carbide liquid separation, mesh, belt, and other factors contained in the raw materials. These factors such as If it is not eliminated, it will cause stress concentration, slowly wear away the basic strength of the ring, and in severe cases will cause the ring of the spherical roller bearing to directly break. Here, spherical roller bearing manufacturers suggest that everyone try to purchase stable and reliable steel, and regularly check the storage of steel, and control from the source, so as to better ensure later use.
2. If problems such as overburning, overheating and internal cracking occur in the production process of spherical roller bearings, it is generally because the temperature control during forging during processing is not stable enough, resulting in the reduction of the toughness and strength of the ferrule. Therefore, in order to avoid and prevent such things, it is necessary to strictly control the processing temperature, cyclic heating and heat dissipation conditions after forging. Here, the spherical roller bearing manufacturers recommend that spray cooling can be used to dissipate heat, especially for larger self-aligning roller bearings. Roller bearing rings have obvious effects. Here, it is necessary to pay attention to controlling the temperature above 700 ℃ as much as possible, and no items should be stored around.
3. It is very important to carry out heat treatment during the processing process. Pay attention to the reliability of the testing equipment. It must be checked in advance before processing. Strict testing is performed during testing to ensure the reliability of the measurement data. False records and randomness, this is also due to the guarantee of the quality of the spherical roller out of the ferrule during the entire heat treatment process. In addition to inspection, the quenching process conditions should be further improved. This is to solve the defects of large spherical roller bearing rings. The composition and performance of the quenching oil should be determined in advance, and it should be used in strict accordance with the requirements and replaced by rapid quenching oil. Enhance the quenching medium to improve the quenching conditions.
4. For the finished spherical roller bearing ring, grinding burns and cracks are not allowed, especially the matching surface of the inner ring screwdriver is not allowed to have burns, so it is generally necessary after pickling. Strict inspection should be carried out, and defective products should be picked out. Some serious burns that cannot be repaired should be scrapped immediately. Burned ferrules must not be put into the equipment.
5. There are also strict standards for the identification of spherical roller bearings. When the purchased steel is put into storage, it must be strictly distinguished between GCr15 and GCr15SiMn, two different materials and products.
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Post time: Jul-25-2022