The manufacturing of nationalstandard bearing pulleys must follow strict specifications and processes. From raw material control to finished product inspection, every link is closely linked to ensure that the product meets national standards.
The starting point of manufacturing is the selection and processing of raw materials. According to the different usage scenarios and performance requirements of nationalstandard bearing pulleys, select suitable metal materials such as high-quality carbon steel, alloy steel, or non-metallic materials such as engineering plastics and nylon. Steel needs to be forged or rolled to remove impurities and refine the grains to improve the strength and toughness of the material; non-metallic materials are molded by injection molding or compression molding to shape the basic shape.
Then enter the component processing stage. The main part of the pulley is precisely formed into wheel grooves, wheel hubs and other structures through mechanical processing processes such as turning and milling to ensure that the dimensional accuracy meets the national standard requirements. The processing of the bearing seat hole is particularly critical, and its dimensional accuracy and surface roughness directly affect the installation and operation of the bearing. At the same time, the inner and outer rings of the bearing also need to be finely processed by grinding and grinding to ensure the matching accuracy of the rolling element and the raceway.
Then comes the heat treatment process. For metal pulleys and bearings, heat treatment methods such as quenching and tempering are used to change the internal structure of the material and improve hardness, wear resistance and fatigue strength. For example, induction quenching can form a hardened layer on the surface of the pulley to enhance its wear resistance, while tempering can eliminate quenching stress and avoid deformation or cracking of components.
After completing the heat treatment, the surface treatment stage is entered. In order to prevent the pulley from being corroded during use, surface treatments such as galvanizing, chrome plating and spraying are usually performed. The galvanizing process forms a dense zinc layer on the metal surface to isolate air and moisture; spraying can select functional coatings such as anti-corrosion and wear resistance according to needs to further improve the protection performance and service life of the pulley.
The key assembly process follows. Assemble the processed nationalstandard bearing pulley body, bearings, shafts and other parts in sequence to ensure that the installation position of each component is accurate. The bearing needs to be matched with appropriate grease to reduce friction and reduce operating noise. During assembly, the coaxiality of the bearing and the pulley must be strictly controlled, and special tooling and measuring tools must be used for calibration to ensure the stability and reliability of the pulley during operation.
After assembly, it enters the comprehensive quality inspection stage. Professional equipment is used to test the dimensional accuracy, surface quality, load-bearing capacity, rotation flexibility and other indicators of nationalstandard bearing pulley. For example, a three-coordinate measuring machine is used to check key dimensions, and the load-bearing performance of the pulley is verified through static and dynamic load tests to ensure that all product parameters meet national standards.
The pulleys that pass the inspection will be cleaned, rust-proofed, and packaged for storage. During the packaging process, product certificates, instruction manuals and other information will be attached, and product models, specifications, implementation standards and other information will be marked for subsequent traceability and use guidance. This series of rigorous process flows jointly guarantee the quality and performance of nationalstandard bearing pulley.
