The slewing bearing
structure includes: inner ring, outer ring, rolling elements and cage guided by rolling elements. It is an important transmission component in mechanical equipment and has been widely used in construction machinery, light industrial machinery, metallurgical machinery, medical machinery, marine equipment and other industries. Application, then the excavator slewing bearing manufacturer will take you to understand the manufacturing process and detailed steps of the slewing bearing.
1. Cutting of slewing bearing steel raw materials
The commonly used raw materials for slewing ring bearings are carbon-chromium bearing steel that is hardened as a whole, and the slewing ring is made of surface-hardened steel, generally made of 50Mn steel, such as: S48C, 42CrMo, 5CrMnMo. The cylindrical raw material billets transported from the steel mill are cut according to the size required for processing the bearing. Generally, the carbide saw blade should be used for cutting bearing steel, which has high hardness, wear resistance, good strength and toughness, heat resistance, corrosion resistance, etc. A series of excellent properties.
2. Slewing bearing billet forging
In a 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 organizational structure of the raw material becomes denser and the flow line 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 the production cost.
3. Forging ring of slewing bearing
The billets are forged into ring-shaped steel rings using a ring mill. Forging can improve the internal structure of steel and improve the strength, plasticity, impact toughness and other mechanical properties of steel.
4. Rough turning
The steel ring after the ring is put into the machine tool, rough machining is performed, various groove raceways are turned, the steel ring is fixed on the gear milling machine, and the teeth are cut. The main purpose is to make the finished ferrule the same shape as the final product, to create conditions for post-grinding machining.
5. Slewing bearing quenching (heat treatment)
After machining, through the 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 carry out high temperature treatment on the bearing ring after forging and turning, which directly affects the uniformity of carburization in the bearing ring, which can improve the wear resistance and hardness of the bearing, and also affects the reliability and life of the bearing important part.
6. Slewing bearing opening processing
Drill the mounting hole on the end face of the steel ring. When opening the slewing bearing, the center and cutting angle should be determined, and the drilling machine, hand-held electric drill and hand drill should be selected for operation.
7. Fine grinding
Fine grinding is to trim the fine parts according to the roughly shaped bearing after opening to ensure the refinement of the appearance. Fine grinding has an impact on the rotation flexibility of the bearing and the machining accuracy of the bearing surface. Modify the deformation caused by the previous process.
8. Slewing bearing assembly operations
Assemble the parts (outer ring, inner ring, roller, cage) processed by various processes, such as: inserting steel balls, isolating blocks, inserting butter sealing strips. Assemble a set of finished bearings according to different technical and precision requirements.
9. Slewing bearing finished product packaging
The finished bearing will be coated with anti-rust oil, packaged and packaged. At the same time, it will also be sampled by the manufacturer's inspector, and the qualified products will be issued with a certificate and then sold.
The above is the relevant content about the manufacturing process and production operation specifications of the slewing bearing, including the relevant content of the slewing bearing material selection, cutting, forging, turning, heat treatment, grinding, and assembly, for your reference. In addition, if you have any questions during the actual operation, you can contact us at any time.