SGB620 / 40T ring chain scraper conveyor chain] [hot] ore manufacturers of high strength ring chain ring size, shape and chain structure has been improved and optimized. These improvements and optimization of the results of stress analysis is based on the chain and the need to increase the power and mining equipment underground mine under conditions of limited space yet made. Mining specifications of high-intensity ring chain increases, change and improve the mechanical properties of structural forms required to promote system-chain equipment and technology to give the corresponding rapid development. Ring chain production process: cutting → cold-formed knitting → hekou → Welding → a correction → heat → secondary correction (pretension) → Check. Welding and heat treatment is the key step in producing mining ring chain, directly affect product quality. Scientific welding parameters can improve the yield and reduce production cost; suitable heat treatment process, can give full play to the material properties, improve product quality. To ensure the quality of welding mine ring chain, manual arc welding and resistance welding has been eliminated, the flash butt welding due to the high degree of automation, low labor intensity, stable product quality and other advantages, has been widely used. Currently, the mine heat ring chain commonly used induction heating continuous quenching, tempering way. Medium frequency induction heating is the essence of the molecular structure of objects in the electromagnetic field being agitated molecules gain energy, collide and generate heat. When the medium frequency induction heat treatment, the sensor leads to a certain intermediate frequency alternating current, the workpiece is moved in a constant speed sensor, so that the workpiece will be generated in an inductor of the same frequency, in the opposite direction of the induced current, the electrical energy into heat energy in the within a short period of time the workpiece is heated to the quenching and tempering the desired temperature. Induction heating faster, less oxidized, get organized and very fine austenite grain size hardening after quenching, so that the strength and toughness link is improved, but also has a clean and hygienic, easy to adjust, the production efficiency. In the tempering stage, the weld zone after high tempering temperature, in a short period of time to eliminate a lot of stress hardening, which is to improve the plastic weld zone toughness, slow crack initiation and development have a very significant effect. Shoulder top tempering temperature is low, high hardness after tempering, help link in the work process, confrontation between the chain and sprocket wear rings and engagement hinge generated.