機械類中英文論文-資料下載頁
2025-06-23 20:35本頁面
【正文】 l plant began using gas nitriding quenching. In 1969, the following enterprise by Beijing gage start light quenching. In 1978, the plete machine tool research institute of Beijing guide surface contact quenching process and equipment, quenching condition of quality inspection. In 1979, scientific research institute of China academy of railway and mechanical institute of highpower diesel engine cylinder collaboration of surface modification of laser. In 1979, Beijing institute of electrical carbon dioxide laser is developed, and the kilowatt in early 1980s respectively applied in cylinder and stamp printing equipments of laser treatment. Among them, tsinghua university, Beijing, Beijing institute of electrical YouPiaoChang jointly pleted YouPiaoChang seven color machine DaKongQi laser surface strengthening research. From 1984 to 1990, Beijing institute of vacuum heat treatment research, gas carburizing microputer control technology (Beijing university of aeronautics amp。astronautics and cooperation), rare earth soft nitriding, powder metallurgy products surface strengthening, kerosene and methanol small drops of microputer control method of carburizing, solid boriding and carburizing process puter aided process planning and tracking control system, and the application of new technology heat in production. Welding and cutting in 1949, Beijing has geodrilling, electric welding and cutting etc oxyacetylene flame manual operation. In 1963, Beijing metal structure and YiJiBu mechanical science research cooperation to develop tungsten argon arc welding, and realize the nitrogen plasma cutting stainless steel. In 1964, the use of dc argon arc welding and tungsten wire alloying technology solved by tilting electrolysis industry worse pure nickel welding. In 1966, Beijing metal structure factory developed by rotating sphere of the submerged arc welding automatic welding. In 1968, the plant began to liquefied petroleum gas (LPG) instead of acetylene cutting. In the early 1980s, tsinghua university invented new MIG welding arc arc technology in control, control a breakthrough. In the early 1980s, the Beijing urban construction design pleted liquefied petroleum gas (LPG) mobile pneumatic rail welding technology research and application. In 1990, Beijing metal structure factory to adopt CNC precision cutting and with photoelectricity tracking and CNC pursuit of high input automatic programming technology plasma cutting.Visible, China mechanical development in modern development of its rapid.8 / 8
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