The Seam Welder Is An Evolution Of Spot Welding
Weld welder is the welding parts assembled into a lap or butt joint and placed between the two roller electrodes, roller electrode pressure welding and rotating, continuous or intermittent pulse transmission, forming a continuous weld resistance welding machine The It can also be said that the seam welder is a kind of evolution of spot welding. The seam welding is widely used in the manufacture of joints requiring sealing, and is sometimes used to weld ordinary non-hermetic sheet metal pieces. seam welder The thickness of the metal material to be welded is usually 0.1 to 2.5 mm.
Seam welding characteristics
1) seam welding and spot welding is the same as the heat - mechanical (force) joint welding process. In contrast, its mechanical (force) role in the welding process is not sufficient (except for step seam welding), seam welder the faster the faster the performance of the welding.
2) The seam welds are made of solder joints which are overlapped with each other, so the splitting at the time of welding is much more serious than spot welding, which makes it difficult to weld the high-conductivity aluminum alloy and magnesium alloy.
3) The surface of the roller electrode is prone to damage and the surface quality of the weld is deteriorated. Therefore, seam welder the dressing of the electrode is a particularly noteworthy problem.
4) Since the cross-sectional area of the seam weld is usually more than 2 times the length of the base material (the thinner the board), the damage will occur in the heat affected zone of the base metal. Therefore, seam welder the seam welding structure rarely emphasize the joint strength, the main requirements of its good sealing and corrosion resistance.