Half-round key connection The first structural feature is that the keyway on the shaft is machined with an external disc milling cutter with the same radius as the key size. The working principle of flat key connection: key side extrusion, key shear transmission torque 3) Wedge key connection Advantages: It can play a one-way axial fixation role on the hub or bear a one-way axial load.

Good neutrality and high cost (processing by special equipment). When the mating surface is a cylindrical surface, the press-in method or the temperature difference method (heating the contained part or cooling the contained part) can be used for assembly. There are many ways to connect the shaft and hub, the most common and widely used are key connection, spline connection, pin connection, interference connection and so on. Flat key type: A-type flat key, B-type flat key, C-type flat key.

Although the connecting parts have no weakened keyway, the stress concentration at the edge of the mating surface is greater. Second, the function of shaft hub connection Transmission torque; fixation and positioning. China Clutch Release Bearings factory \tworking principle: The reason why interference coupling can transmit load is that the parts have elasticity and the coupling has assembly interference. At the same time, there is a gap between the top surface of the key and the hub keyway during assembly, which does not affect the centering of the hub and the shaft, so the neutrality is better, so it is used widely.

Higher and inconvenient assembly.1. Advantages of flat key connection: Ordinary flat key connection has the advantages of simple structure and convenient assembly and disassembly. Interference connection Interference connection uses the fit interference between parts to achieve connection.. Which assembly method is used is determined by the factory equipment conditions, the amount of interference, and the structure and size of the parts.

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Improving the cleanliness of bearing steel, especially reducing the oxygen content in the steel, can significantly extend the life of the bearing. The US Naval Research Institute (NSP) conducted a 650°C warm processing test on 52100 steel and showed that no fracture occurred at a true strain of 2.

Developed high-frequency hardening bearing steel, using ordinary medium carbon steel or medium carbon manganese, chromium steel, through high frequency heating and quenching to replace ordinary bearing steel, which not only simplifies the production process, reduces costs, and increases the service life. In the late 1980s, the advanced level of Japan's Sanyo Special Steel Company was 5.

Due to the increasing use of bearings in environments with high temperature, corrosion, and harsh lubrication conditions, bearing steels such as M50 (CrMo4V) and 440C (9Cr18Mo) ​​used in the past can no longer meet the requirements of use. After rolling, air cooling and short-time annealing are adopted, or the spheroidizing annealing process is completely eliminated, and qualified bearings can be obtained Steel organization.

In terms of heat treatment, progress has been made in improving the qualit ynon-standard bearings suppliers of spheroidizing annealing, obtaining fine, uniform and spherical carbides, and shortening the annealing time or eliminating the spheroidizing annealing process In the guidance work, the division of labor is responsible for guidance. The main content of the search is based on the principle of adhering to the 'three key points', and mainly searches for the possibility of subjective and deliberate embezzlement, misappropriation, or the loss of company assets during the operation of power. It is a quantitative change.　　　　

The activity implementation plan made detailed arrangements for the procedures and methods for finding risk points, as well as specific implementation steps and time limits.　　　　 

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