The hazards of square rectangular tube welding spatter are as follows: reducing welding deposition efficiency and reducing welding productivity; spatter is easy to adhere to weldments and nozzles, affecting welding quality, making welding working conditions worse and cleaning hours increased; Unstable, resulting in defects such as rough weld shape. How to prevent the occurrence of splash? Next, I will introduce five measures to you.

(1) In square rectangular tube arc welding, there is a certain rule between the spatter rate of welding wire of each diameter and the welding current: the spatter rate in the small current area is small, and the spatter rate in the high current area is also small, and the spatter rate in the high current area is also small. The splash rate is the highest in the middle zone. Therefore, when selecting the welding current, the current area with a high spatter rate should be avoided as much as possible.

(2) The protruding length of the welding wire should be shortened as much as possible, which can more effectively reduce the welding spatter of the square rectangular tube.

(3) When the gas-shielded welding machine adopts positive polarity, because the arc is affected by the pressure of the anode spots, the spatter increases sharply and the particles are large, so the DC reverse polarity connection method is generally used.

(4) A large inductance is connected in series in the welding circuit. When using medium current standard gas shielded welding, because the arc length is short, and the molten droplet and molten pool are constantly moving, the molten droplet and molten pool are very prone to short circuit process, so the gas shielded welding is except for the large drop repulsion transition. , There is also a part of the droplet that is a short-circuit transition, and a larger inductance is connected in series in the welding circuit to make the short-circuit current rise slower, which can properly reduce the welding spatter of the square rectangular tube.

(5) The amount of spatter is the least when the torch is vertically welded to the square tube, and the larger the inclination angle, the more spatter. The practice has proved that the forward or backward tilt of the welding torch is preferably not more than 20°, and the maximum cannot exceed 25°.