Tungsten Copper Seam Welding Wheel is a commonly used electrode material in seam welding process. Seam welding, also known as seam welding, is a type of resistance welding. The workpieces are assembled to form an overlap or butt joint, and then placed between two roller electrodes. The roller electrodes press the weldment and rotate, and are continuously or intermittently energized to form A continuous weld seam welding method.
Seam welding is a welding method that uses a pair of roller disk electrodes instead of the cylindrical electrodes of spot welding, and moves relative to the workpiece to produce a sealed weld with nuggets overlapping each other.
Seam welding is widely used in the manufacture of joints that require sealing, and is sometimes used to connect non-sealing sheet metal parts. The thickness of the metal material to be welded is usually 0.1 to 2.5mm. Seam welding is widely used in thin plate welding of oil drums, cans, radiators, aircraft and automobile fuel tanks, and sealed containers in jet engines, rockets, and missiles.
According to the rotation and energization form of the seam pad, seam welding can be divided into three types: continuous seam welding, intermittent seam welding and step seam welding.
1. Continuous roll welding: The roll pad rotates continuously, the weldment continuously moves between the two roll pads, and the welding current is continuously turned on. Since the two roller pads always pass a large current, the roller pads and the weldment heat up seriously, the roller pads are easily worn out, and the welds are easily overheated and produce large pits.
2. Intermittent roll welding: The roll pad rotates continuously, the weldment continuously moves between the two roll pads, and the welding current is turned on intermittently. Since the welding current is switched on intermittently, the roll pad and the weldment have a chance to cool down. The roll pad loss is small and the weld is not easy to overheat, so it is the most widely used.
3. Step roll welding: The roll pad rotates intermittently, the weldment moves intermittently between the two roll pads, and the welding current is turned on when the roll pad stops. Since the solidification of the molten core occurs when the rolling pad stops, a denser weld can be obtained. But the mechanism that drives the seam pad is more complex than intermittent seam welding.
