How to ensure the appearance and welding quality of the welded joint

Generally speaking, to form a beautiful and strong weld grain, there are several major points. First: the hand should be stable, can not shake, which is directly related to the molding of the weld grain is beautiful. Second: time to master, the thicker the steel plate, can lengthen the welding time, otherwise easy to weld imperpermeability; On the contrary, the thinner, and can be over, to prevent welding. Third: starting spot welding and finishing time to master the same, so that the welding out of the thing will be firm, can bear a greater weight. Of course, the master lead the door, practice to see the individual, each person’s technique habits are not the same, this kind of pull welding technology all flat personal technology and feel. In the welding process, when a weld is finished, if the arc is broken immediately at the end of the weld, it will form a crater below the surface of the weldment. The arc crater is too deep, easy to cause stress concentration and crack, so the residence time must be mastered well, and we also need to fill the arc crater at the end. Welding bead connection Tail-head connection is to weld the bead tail joint first, which is the most commonly used joint; Head to head connection is from the beginning of the welding bead continued welding head connection mode, requires the beginning of the welding bead slightly before the arc, and slightly elongate the arc, the arc to the beginning, and cover the end, with the beginning of the welding flat and then move to the reverse. Tail-to-end welding is that the back weld bead leads an arc from the leading end of the interface to the end of the front weld bead. The welding speed is slightly slower to fill the arc pit, and then a short section is welded forward at a faster welding speed to extinguish the arc. End to end is the end of the back weld bead is connected with the beginning of the first weld bead, using the high temperature repeat melting at the end of the beginning of the first weld bead, the weld bead is welded flat and quickly closed. The essence of bead end is what happens at the end of the bead. General closing methods have the following: (1) ring ending method: when the electrode moves to the end of the weld, it moves in a circle until the arc pit is filled and then the arc is broken. This method is suitable for thick plate ending. (2) Repeated arc breaking ending method: when the electrode moves to the end of the weld, the arc is repeatedly extinguished and triggered several times at the arc pit until the arc pit is filled. This method is generally suitable for thin plate and high current welding, but alkaline electrode should not use this method, because it is easy to produce pores. (3) back welding ending method: : the electrode moved to the end of the weld is stopped, and change the Angle of the electrode back welding a small section. This method is suitable for alkaline electrodes.铜焊丝,Copper Welding Rods,铝焊丝,aluminium welding wire,镍焊条,Nickel electrode,药皮焊条,Flux Coated Brazing Welding Rods