There are two methods of DC welding
positive and reverse, depending on the needs of the workpiece. The positive connection means that the workpiece is connected to the positive electrode, and the welding tob (electrode) is connected to the negative electrode. The reverse connection is the reverse. Which pole is connected to judge? DC Welding Machine 1. If the workpiece to be welded is compared, it is not easy for the workpiece to melt, that is, the penetration depth is relatively large, and the welding rod melts slowly, so it is necessary to connect the workpiece to the positive electrode, so that the temperature of the positive electrode area is high, which is easy to promote the workpiece melt. 2. If it is a relatively thin steel plate, or stainless steel and non-ferrous metals, heat-sensitive metals, semi-cold welding of cast iron, surfacing welding and alkaline welding electrodes, connect the welding rod (electrode) to the positive electrode at this time, and the welding electrode will melt. It is faster, and the pen...