The research of gear coupling manufacturers found that coupling forging technology is very important

       After many years of practical experience, Rongxing concluded that the forging technology of the coupling is very important to the quality of the coupling. The forging of the coupling should have sufficient tonnage of water pressure or forging on a forging hammer. The forging should have a sufficient forging ratio so that the entire cross-section Forged through to obtain a homogeneous structure.

Coupling Forging Technology:

The axis of the forging of the coupling should be equivalent to the center line of the steel ingot, and the forging should be forged from a steel ingot or billet. Double-scale forging is allowed, and it should generally be used as a shared heat treatment. Heat treatment and machining requirements: heat treatment after forging; preheat treatment should be carried out after forging to improve structure and machinability. Rough machining; rough machining should be carried out before heat treatment for forging properties. Leave some small machining allowances. Performance heat treatment: Forgings should be quenched and tempered to achieve the required properties. Machining after performance heat treatment: After the mechanical performance is qualified, the forging is processed to the size and surface roughness specified in the drawing provided by the buyer. However, if the cutting amount of any surface exceeds 5mm, the forging must be subjected to stress relief treatment. Stress removal treatment: The temperature for stress removal of forgings should be the final tempering temperature of 30 degrees. After moisturizing, it should be cooled slowly. If the final tempering temperature is 30 degrees, the mechanical performance test should be carried out again for the forging after stress removal.

Introduction of the coupling:

Couplings are mainly connected with the shafts of motors, reducers and working machines. The shaft hole form, splicing form and size mainly depend on the size of the connected equipment. The design is generally based on the national standard for cylindrical and conical shaft extensions. Design the shaft, the shaft extension standard is for the design of the shaft. Couplings of various structural forms are designed in order to transmit the torque in the structural design amount series design. Based on the structure of the coupling and the strength of the hub, the shaft hole range and shaft hole length of each specification coupling are determined, and only one shaft hole length is used for each specification.

Summarize:

Failure to understand the true meaning of the shaft extension standard is the main reason for this phenomenon. The shaft hole of the coupling should conform to the shaft extension standard, and the length of the shaft hole depends on the transmitted torque, the strength of the hub and the key.