Welding methods can be roughly divided into building welding structure, storage tank and container welding structure, pipeline welding structure and conductive welding structure according to the object and purpose. The building steel structure we call includes these four types of welding structures. The selected structural materials are steel, and most of them are ordinary carbon steel and low alloy structural steel. Several welding methods of Shandong CNC welding equipment include manual arc welding, gas shielded welding, self shielded arc welding, submerged arc welding, stud welding, spot welding, etc.

手工电弧焊依靠电弧的热量进行焊接的方法称为电弧焊,手工电弧焊是用手工操作焊条进行焊接的一种电弧焊,是建筑钢结构焊接中常用的方法。

Manual arc welding relies on the heat of the arc for welding, which is called arc welding. Manual arc welding is a kind of arc welding with manual welding rod. It is the most commonly used method in the welding of building steel structure.

手工电弧焊的原理,如图7—1所示,焊条和焊件就是两个电极产生电弧,电弧产生大量的热量,熔化焊条和焊件。焊条端部熔化形成熔滴,过渡到熔化的焊件的母材上融合,形成熔池并进行一系列复杂的物理——冶金反应。随着电弧的移动,液态熔池逐步冷却、结晶,形成焊缝。

The principle of manual arc welding is shown in Figure 7-1. The electrode and weldment are two electrodes that generate an arc. The arc generates a lot of heat to melt the electrode and weldment. The end of the electrode melts to form droplets, which are transferred to the base metal of the molten weldment to form a molten pool and carry out a series of complex physical metallurgical reactions. With the movement of the arc, the liquid molten pool gradually cools and crystallizes to form a weld.

在高温作用下,冷敷于电焊条钢芯上的药皮熔融成溶渣,覆盖在熔池金属表面 ,它不仅能保护高温的熔池金属不与空气中有害的氧、氮发生化学反应,并且还能参与熔池的化学反应和渗入合金等,在冷却凝固的金属表面,形成保护渣壳。

Under the action of high temperature, the coating cold deposited on the steel core of the welding strip melts into molten slag and covers the metal surface of the molten pool. It can not only protect the high-temperature molten pool metal from chemical reaction with harmful oxygen and nitrogen in the air, but also participate in the chemical reaction of the molten pool and infiltrate the alloy, forming a protective slag shell on the cooled and solidified metal surface.

窄间隙焊接本方法是利用已有的气体保护焊的特别技术,具有焊接接头的坡口截面面积比手工电弧焊或气体保护焊的坡口截面面积小,这是本方法的特点 。

Narrow gap welding this method uses the existing special technology of gas shielded welding, and has the characteristics that the groove section area of the welded joint is smaller than that of manual arc welding or gas shielded welding.

窄间隙焊接可以在平焊、横焊和立焊位置进行,横焊适合工程现场的柱接头,平焊和立焊分别适合于工厂内箱形柱的角接头和柱与梁的焊接。

Narrow gap welding can be carried out at the positions of flat welding, horizontal welding and vertical welding. The horizontal welding is suitable for the column joints on the project site. The flat welding and vertical welding are respectively suitable for the corner joints of box columns and the welding of columns and beams in the factory.

螺柱焊接是在螺柱与母材之间通以焊接电流,使相互接触的局部加热并接合的方法,主要用于抗剪连接件及混凝土锚栓等的焊接,另外还广泛用于安装隔热材料和隔音材料的连接件。

Stud welding is a method of heating and joining the local parts in contact with each other by applying welding current between the stud and the base metal. It is mainly used for the welding of shear connectors and concrete anchor bolts. In addition, it is also widely used for the installation of connectors of heat insulation materials and sound insulation materials.

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