best selling four-point contact ball slewing bearing
1.What factors are related to the service life of the four-point contact ball slewing bearing?
It is widely used in many construction machinery (such as excavators, etc.) or equipment platforms (such as drilling platforms, etc.).
Operators will consider its durability more when purchasing four-point contact ball slewing bearing, because slewing bearings have a longer service life, which can save costs and avoid affecting the production process due to maintenance or replacement of bearings.
Factors affecting the service life of four-point contact ball slewing bearing:
1. Design Factors
Whether the data of the four-point contact ball slewing bearing is compatible with the matching equipment during the design has a great relationship with the service life of the bearing.
For example, the diameter, number, effective length of rolling contact, radian and size of the contact surface of the bearing rolling element, etc.
2. Material factors
For four-point contact ball slewing bearing to ensure reliable quality, material control is the foundation. Because the quality problem caused by the material itself is a flaw, it cannot be remedied by technology in the later stage.
Such as the martensite in the quenched steel, the impurities, gas, cracks in the steel during the bearing production process.
3. Manufacturing process factors
During the manufacturing process of the four-point contact ball slewing bearing, due to technological or technical problems, the bearing parts hardness, surface burns, bumps and scratches, roughness, production accuracy, bearing clearance and other problems will affect its service life.
4. Selection factors
The selection of the slewing bearing should be matched with the equipment, and the load, hardness, operating environment and other factors of the bearing should be emphasized to ensure that the bearing runs the bearing and avoid unnecessary damage to the bearing.
5. Assembly factor
The assembly factors of the four-point contact ball slewing bearing mainly include installation accuracy, selection of assembly tools, whether there are impurities mixed in the installation process, assembly position of parts, assembly clearance, lubricant selection and filling amount, etc.
Strictly assembling according to relevant standards can reduce the wear, overheating, noise and other phenomena of the bearing, which is also directly related to the running quality and service life of the bearing.
6. Working environment and load
People work more efficiently in a comfortable environment. Long-term overloading will cause physical damage, and the same is true for machinery and equipment parts.
For the slewing bearing, the working temperature and the cleanliness of the working environment all affect the service life of the bearing; the bearing has its rated load during production, and if it is overloaded for a long time, its performance and service life will be adversely affected.
7. Maintenance
People say that “three points of use, seven points of nourishment” is actually very reasonable. Regular inspection and maintenance of slewing bearings, cleaning and lubrication can reduce bearing wear and prolong their service life.
2.What is the production process of four-point contact ball slewing bearing?
Production process of slewing bearing
1. Steel raw material cutting
The raw material commonly used for slewing ring bearings is 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.
First, the billet should be cut according to the expected size of the bearing, and the carbide saw blade with high hardness, wear resistance, strength and toughness should be used for cutting bearing steel.
2. Billet forging
The billet forging is to heat the billet in a heating furnace and forge it into a round cake shape. The purpose is to ensure the reliability and life of the bearing. After the raw material is forged, the bearing ring blank is formed.
3. Forging ring
The steel billet is forged into a ring-shaped steel ring by using a ring rolling machine, and the internal structure of the steel can be improved by forging, so that the steel material has more strength, plasticity and impact toughness.
4. Rough turning
Put the steel ring after the ring into the machine tool, carry out rough turning, turn out various groove raceways, fix the steel ring on the gear milling machine, cut the teeth, and provide conditions for the later grinding machine processing.
5. Heat treatment
Heat treatment is also called quenching.
Generally speaking, the heat treatment process is to carry out high temperature treatment on the bearing ring after forging and turning, which can affect the uniformity of carburization in the bearing ring and improve the wear resistance and hardness of the bearing.
6. Drilling
When drilling the mounting hole on the end face of the steel ring, pay attention to the center and cutting angle before opening the hole. You can choose a drilling machine, a hand-held electric drill and a hand-operated drill for operation.
7. Fine grinding
Fine grinding is to dress the fine parts of the bearing. Fine grinding can affect the rotation flexibility of the bearing and the machining accuracy of the bearing surface. The raceway surface of the steel ring is finely turned again to modify the deformation caused by the previous process.
8. Assembly and packaging
Assemble the processed parts; the assembled finished bearings are coated with anti-rust oil, sampled for quality inspection, packaged and packaged, and then enter the storage or sales process.
