Shandong Advanced Mining Equipment produces chains, rigging, and other products. Here's a brief introduction to the key points of the manufacturing process for high-strength circular rings: In terms of processing technology: new processes such as active thickness measurement, continuous rolling, shot blasting, extrusion, roller cold extrusion forming, high-speed multiple bright cutting, four-point riveting, and double-sided printing are being adopted by the industry, which has significantly improved the quality of chain products. In terms of chain manufacturing equipment: China has successively independently developed a series of chain-making equipment with Chinese characteristics, including high-speed automatic chain sheet blanking machines, high-speed pin machines, high-speed pipe coiling machines, roller five-position cold extrusion machines, chain assembly automatic lines, high-speed chain assembly machines, and multi-position flat-top chain automatic forming and assembly lines, replacing some traditional chain-making equipment and narrowing the gap between China's specialized chain-making machines and foreign equipment. In terms of heat treatment: In recent years, China has made significant advancements in the heat treatment technology and equipment for chain products. Some companies use an annealing furnace with nitrogen (or nitrogen-hydrogen mixed gas) protection for raw materials; chain components are typically heat treated in a heat treatment mesh belt furnace for quenching and tempering, ensuring stable quality with a dispersion of 3-4 degrees; new processes such as the toughening treatment of chain components, chrome and boron infiltration, isothermal quenching, and replacing the quenching medium with water instead of oil have also been introduced.