With the introduction of foreign technology, Jinan Second Machine Tool Plant in 1981 applied first Φ1.6 solid core CO2 gas welding technology alternative the United States VERSON all-steel mechanical press companies Φ2.4 cored rich argon gas shielded arc welding process, presses large weldment welding process research and success. The project won the third prize of scientific and technological progress of the Department of Mechanical. 1986 Qiqihar Second Machine Tool Plant Application Φ1.2 solid core argon-rich gas shielded arc welding technology to solve the problems of large presses weldment welding and the copper filament argon arc welding technology, such as piston, cylinder workpiece surface copper layer surfacing alternative to our traditional copper sleeve succeed. Jinan First Machine Tool Plant in 1992 in the first application of the structural parts of the machine tools sheet cover Φ0.8 solid core CO2 gas shielded arc welding. During the Seventh Five-Year Plan "period, Jinan Second Machine Tool Works also CO2 gas shielded arc welding is applied to the the lengthened Welding Alloys presses tightening bolts on the project the machine tool industry, the Department of Mechanical the Seventh Technology Achievement Award. Gas Shielded Welding Wire high-efficiency welding technology has been widely used in the machine bed, gear, eccentric body, rocker shaft, cylinder, not machined after welding pipe flange and cover other parts, has become the machine tool industry one of the main process of welding.