Continuous and broken arc welding of butt welding flange

Application of butt welding flange continuous arc welding and broken arc welding

　　 Butt welding flange electrode arc welding, single-sided welding, double-sided forming bottom welding process, according to the different methods can be divided into two types: continuous arc welding and broken arc welding

　　 1. Continuous arc welding method of butt welding flange

The butt welding flange continuous arc welding method uses a smaller welding current and a smaller diameter electrode. During the welding process, the arc maintains a continuous and stable combustion, and the smaller groove gap is evenly swung forward to make the welding The method of forming a uniform weld on the back of the part. This method is simple to operate, small in technique changes, easy to master, and the back of the weld is formed dense and neat, with good internal quality and excellent mechanical properties. It is widely used at home and abroad. Its disadvantage is that it is beveled Limitation of the gap. When the acid electrode is connected, the difficulty of its joint is more prominent. The continuous arc welding method is mainly used for the welding of various positions of the alkaline electrode and the vertical and overhead welding of the acid electrode.

　　2. Arc-break welding method of butt welding flange

The butt-welded flange broken arc welding method is to start and extinguish the arc rhythmically through the arc during the welding process, so as to control the temperature of the molten pool and obtain a good weld formation and internal quality welding method. Its advantage is that it can be used larger The groove gap is relatively large, and a larger welding current is used. For single-sided welding of thinner weldments, the welding current used is not greatly restricted. The broken arc welding method is mainly used for flat welding, horizontal welding and horizontal welding of acid electrodes. In the single-sided welding of thin-walled weldments such as tube sheets and double-sided forming and bottom welding, this welding method is more practical in production and maintenance. However, compared with continuous arc welding, the broken arc welding method is more difficult to master. Flanges also have higher requirements for welders' basic skills.