焊接用来作为金属的连接方式,在金属结构制造中得到了广泛的应用,在很大程度上取代了铆接,而居于首位。焊接结构的优越性在于:能节省大量金属,一般可以节省10～25％甚至更多;成本较低,劳动量与设备费用都较小;整体性好,能密不透气;表面光滑,式样美观。但是,焊接结构的发展在目前还不是十分完善的,例如,结构形式还有待于改进,结构上的许午多特征还了 Welding used as a metal connection, in the manufacture of metal structures has been widely used, largely replaced by riveting, and living in the first place. The superiority of welding structure lies in: can save a large amount of metal, can generally save 10 ~ 25% or even more; lower cost, less labor and equipment costs; good integrity, can be airtight; smooth surface, beautiful appearance . However, the development of welding structure is not perfect at present, for example, the structure needs to be improved, and many structural features of the afternoon return