In industrial production and daily life, as a key component to connect and transmit power, the importance of chain is self-evident. From bicycles to heavy machinery, from simple hoisting equipment to complex conveying systems, the application of chains is everywhere. However, ensuring the safety and reliability of these chains requires strict quality control and manufacturing testing. This paper will discuss the manufacturing process and testing method of chain to ensure the high quality of the final product.

1. Manufacturing process

Chain manufacturing usually includes the following steps:

Selection of raw materials: choose high-quality steel or other materials suitable for specific applications.

Heat treatment: improve the hardness and toughness of the chain through heating, quenching and tempering.

Forming: the basic shape of the link is formed by stamping or forging technology.

Welding: For some types of chains, such as roller chains, it is necessary to weld the links accurately.

Surface treatment: In order to prevent corrosion and prolong service life, the chain is usually treated with zinc plating, nickel plating or painting.

2. Quality inspection

In order to ensure the quality of the chain, the manufacturer will carry out many quality tests in the production process, mainly including the following items:

Dimensional inspection: Use calipers, micrometers and other tools to measure the dimensions of chain links to ensure that they meet the design requirements.

Strength test: Apply increasing force to the chain by tensile testing machine until the chain breaks, and record the maximum bearing capacity.

Fatigue test: simulate the actual working environment, repeatedly load and unload, and observe the durability and stability of the chain.

Chemical composition analysis: through the analysis of the chemical composition of raw materials, ensure that the materials meet the standard requirements.

Non-destructive testing: use ultrasonic wave, magnetic particle flaw detection and other technologies to check internal defects, such as cracks, pores, etc.

3. Application case

Taking mine transportation as an example, due to the harsh working environment, the chain must have extremely high strength and wear resistance. Therefore, in the manufacturing process, in addition to the conventional quality inspection, more stringent high-temperature aging test and impact resistance test will be carried out to ensure that the chain can operate normally under extreme conditions.

4. Conclusion

The quality of the chain directly affects the safety and efficiency of the whole system. Through scientific and reasonable manufacturing technology and strict quality inspection, the performance of the chain can be effectively improved, the failure rate can be reduced and the service life can be prolonged. future, with the development of new materials and technologies, the design and manufacture of the chain will be more refined, which will better meet the needs of various complex working conditions.