Determine the welding current

Listen to a engaged in welding for more than 10 years of welding veteran master, beginners in welding can correct welding current will be very important for welding quality, because the welding current has a great impact on the weld shape. Welding current is too small, will cause penetration, no fusion and sticky electrode phenomenon; And the current is too large, will cause weld through, bite, as well as weld bead and other quality defects. How should welder choose the right welding current when welding? Master said, for the correct choice of welding current needs to be selected according to a variety of parameters. The thickness of the weldment, the diameter of the electrode and the position of the welding etc. For manual arc welding, the welding current depends on the electrode diameter and size, usually the electrode diameter multiplied by the empirical coefficient. Common 2-4 mm electrode empirical coefficient of 30-40, if the electrode diameter of 4-6, the empirical coefficient of 40-60. It can be adjusted appropriately according to the specific situation on site. And in the field, the welder can be based on the actual intuitive judgment, arc difficult, easy to stick electrode, forming is not smooth, welding rod melting difficult to determine the current is too small; On the contrary, if the welding spatter is too large, the molten pool is excessive, the electrode is red and so on, the current is too large. The size of welding current selection, but also depends on a welder’s technical level and operation habits. Some beginners need to adjust the current size according to the ammeter on the welding machine at the beginning, and for the experienced welder can rely on experience and the sound of the burning electrode to judge. According to the master, the sound produced by the appropriate current is very uniform and smooth, and the current can be adjusted timely according to the shape and sound of the molten pool. The old master said that every welder has his own skills and experience, and the choice of current varies from person to person.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