Due to the high cost and high risk of labor in coal mining industry, high-tech comprehensive mining equipment is widely used in coal mines. Mining high strength compact chain is the main and important accessory of scraper conveyor in coal mining operation - with the development of scraper conveyor, the quality requirements for large-scale compact chain are higher and higher. How to improve the quality will be discussed in this paper Process flow, key process and practical problems are analyzed.

Compact chain refers to that the outer width of the two adjacent rings in the chain is obviously different. On the conveying equipment, the outer width of the vertical ring is smaller than that of the flat ring under the same diameter. Therefore, the efficiency of the conveying equipment can be upgraded and the conveying capacity of the conveying equipment can be improved without changing the chain size of the conveying equipment. At the same time, because the straight arm part of the vertical ring contacts the middle plate of the conveyor chain, the traditional linear contact characteristics of the ring chain are changed and the wear resistance is increased.

After the annealed chain steel enters the site, it must pass the inspection and meet the standard requirements before entering the blanking process. During the blanking process, the raw materials are cut into short sections. For example, the blanking length of 8460mm raw materials is 526mm with a sawing machine. This process generally uses special tooling or CNC sawing machine, which is enough to guarantee the + 03 tolerance.