中國的機械發(fā)展講義-展示頁
2025-07-07 23:41本頁面
【正文】 on punching moulds dependence on imports. Before 1949, Beijing has heat treatment furnace, salt dissolved by thermocouples means furnace, quenching and tempering, parts of annealing, normalizing, quenching and tempering, carburizing and etc. In 1956, Beijing first began using highfrequency quenching machine tool plant. In 1961, the Beijing second machine tool 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 aeronautics8 / 8。s first national machinery development. Chinese mechanical engineering technology not only has a long history and splendid achievements in Chinese is not only the material culture and social economic development plays an important role in the world, and to promote the progress of civilization, technology has made great contribution to Chinese traditional machine. And in a long period ahead in the world. In modern times, especially from the early 18th century, due to the nineteen forties, due to the economic and social reasons, such as the China machinery industry, stagnation, in the 100 years is western bourgeois political revolution and industrial revolution, mechanical science and technology is developing rapidly, and far more than the level of China. So, China mechanical development level and the western gap widens, sharply to the 19th century middle
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