窄间隙自动焊接技术及其应用-syc.doc

河南机电高等专科学校 毕业设计论文 毕业论文题目：窄间隙自动焊接技术及其应用 。 2015年4月27日窄间隙自动焊接技术及其应用 摘要:焊接技术是现代工业生产中不可缺少的先进技术，已经成为金属加工的重要手段之一。随着科学技术的不断发展，焊接技术越来越受到各行各业的密切关注，广泛应用于机械，冶金，电力锅炉和压力容器，建筑，桥梁，船舶，汽车，电子，航空航天，军工和军事装备等产业部门和海洋工程，核电工程，电子技术工程中。 窄间隙焊接技术是1963年美国巴特尔（Battelle)研究所提出的，1966年首次使用“窄间隙焊接”（Narrow Gap Welding，简写NGW）一词。此后，在世界范围内的焊接文献中便广泛使用起来。日本压力容器研究委员会施工分会给窄间隙焊接下了这样一个定义：窄间隙焊接是把厚度30mm以上的钢板,按小于板厚的间隙相对放置并开坡口，再进行机械化或自动化弧焊的方法（板厚小于200mm时，间隙小于20mm；板厚超过200mm时，间隙小于30mm）。经过半个多世纪的研究和发展，人们对其焊接方法和焊接材料进行了大量的开发和研究工作，目前窄间隙焊接在许多国家的工业生产中都发挥着巨大的作用。 Abstract Welding technology is indispensable in modern industrial production of advanced technology, has become one of the important means of metal processing. With the continuous development of science and technology, welding technology by close attention from all walks of life, more and more widely used in machinery, metallurgy, electric power, boiler and pressure vessel buildings, Bridges, ships, cars, electronics, aerospace, military industry and military equipment and other industrial sectors and ocean engineering, power engineering, electronics engineering. Narrow Gap Welding technology is the United States in 1963 bateer (Battelle) research institute, for the first time in 1966 using the Narrow Gap Welding (Narrow Gap Welding, abbreviated NGW) a word. Since then, in the world within the scope of the welding is widely used in the literature. Research committee of Japans pressure vessel construction branch to narrow gap welding under such a definition: a narrow gap welding is more than 30 mm thickness steel plate, the gap is smaller than the thickness of place and open groove, relative to mechanization and automation of welding methods (thickness is less than 200 mm, the gap is smaller than 20 mm; thickness of more than 200 mm, the gap is less than 30 mm). After more than half a century of research and development, people on the welding method and welding material carried out extensive research and development work, narrow gap welding in many countr