Slewing ring bearings are also called slewing bearings. The main structure includes: inner ring, outer ring, rolling elements, and rolling element-guided cages. They are important transmission components in mechanical equipment. They are used in engineering machinery, light industrial machinery, metallurgical machinery, medical machinery, Ship equipment and other industries are widely used. Next, the slewing ring manufacturer will take you to understand the manufacturing process and detailed steps of the slewing ring.
1. Cutting of slewing bearing steel material
The commonly used raw material for slewing bearings is integrally hardened carbon-chromium bearing steel, and the slewing ring is made of surface hardened steel, generally made of 50Mn steel, such as: S48C, 42CrMo, 5CrMnMo. The cylindrical raw material billet transported back from the steel mill is cut according to the size required for processing the bearing. Generally, carbide saw blades should be used for cutting bearing steel, which have high hardness, wear resistance, strength and toughness, heat resistance, corrosion resistance, etc. A series of excellent properties.
2. Slewing bearing billet forging
In the heating furnace, the billet is heated and forged into a round cake shape. The forging link is an important link to ensure the reliability and life of the bearing. After the raw material is forged, the bearing ring blank is formed. At the same time, the organization structure of the raw materials becomes denser and the flow linearity becomes better, which can improve the reliability and service life of the bearing. In addition, the quality of the forging process will directly affect the utilization rate of raw materials, thereby affecting production costs.
3. Slewing ring forged ring
The steel blank is forged into a ring-shaped steel ring using a ring rolling machine. Forging can improve the internal structure of steel and improve the strength, plasticity, impact toughness and other mechanical properties of steel.
4. Rough turning processing
The steel ring after the ring is put into the machine tool, and the rough turning of machining is performed, and various groove raceways are turned out, and the steel ring is fixed on the gear milling machine to cut teeth. The main purpose is to make the shape of the ferrule after the final product the same, creating conditions for the later grinding machine processing.
5. Slewing bearing quenching (heat treatment)
After machining, through quenching operation, the strength and hardness of the steel are improved, and the wear resistance, fatigue strength and toughness of the metal are improved. The heat treatment process is to subject the forged and machined bearing ring to high temperature treatment, which directly affects the uniformity of carburization in the bearing ring, improves the wear resistance and hardness of the bearing, and also affects the reliability and life of the bearing. Important link.
6. Hole processing of slewing bearing
Drill the mounting hole on the end face of the steel ring. When opening the slewing bearing bearing, determine the center and cutting angle. Choose a drilling machine, hand-held electric drill and hand drill for operation.
7. Fine grinding
Finishing is to trim the fine parts of the bearing roughly formed after the hole is opened to ensure the refinement of the appearance. Finishing has an effect on the rotation flexibility of the bearing and the precision of the bearing surface. Once again, the raceway surface of the steel ring is finished. Modify the deformation caused by the previous process.
8. Slewing bearing assembly operations
Assemble the parts (outer ring, inner ring, roller, cage) processed through various processes, such as inserting steel balls, spacer blocks, and inserting butter sealing strips. Assemble a set of finished bearings according to different technical and precision requirements.
9. Slewing bearing finished packaging
The finished bearing will be coated with anti-rust oil, packaged and packaged. At the same time, it will be sampled and inspected by the factory inspector, and the qualified products will be issued with a certificate, and then sold.
The above is the related content of the slewing bearing manufacturing process and production operation specifications introduced by the slewing bearing manufacturer, including the selection of slewing bearing material cutting, forging, turning processing, heat treatment, grinding processing, assembly and other related content for your reference.