(1) lap seam welding with welding, seam welding lap joint can be used to roll plate or with a rolling disk and a mandrel electrode. The minimum amount of overlap of the connector is the same spot. The lap joint welding in addition to the commonly used double-sided seam welding, there are single-sided single sewn seam welding, single-sided dual-sew the seam and small-diameter circle and seam welding. Small diameter circumferential seam welding can be used the â‘  deviate from the pressure axis of the roll disk electrode; â‘¡ The horizontal seam welder attached to a positioning device; â‘¢ the ring electrode, the electrode surface of the workpiece tapered cone tip must fall on the small-diameter circumferential weld center in order to eliminate slippage of the electrode on the workpiece. Flatten the seam welding of lap than the general seam welding is much smaller, about 1-1.5 times the plate thickness, welding, flatten the joints, the thickness of the connector after welding of the sheet thickness 1.2-1.5 times. Usually cylindrical surface of the roller tray, and its width should cover all the lap portion of the connector. Welding to be used when welding pressure and continuous current. In order to obtain a stable welding quality, the need to precisely control the amount of overlap. Usually want to workpiece firmly clamped or tack welding pre-fixed. This method can get the good appearance of the weld, the welding of the commonly made of low carbon steel and stainless steel food containers and freezer lining products. Three pad foil seam welding is a method to solve the slab seam welding. Board 3mm thick, conventional lap seam welding, must be very slow welding speed, welding current and electrode pressure, which can cause the workpiece surface overheating and electrode adhesion, so that the welding difficulties. Mats foil seam welding, can overcome these difficulties. Pad foil welding on the joints with a brief introduction: the first panel edge butt joints by rolling the plate of two foils with a bedding roll plate and plate. Foil with a thickness of 0.2-0.3mm, width 4-6mm. Foil to increase the resistance of the Welding Electrode Materials zone and cooling difficulties, which is conducive to the formation of the nugget. Advantage of this approach are: joints more gentle strengthening high; good appearance; plate thickness the foil thickness is the same; less splash, and thus corresponds to a current electrode pressure should be the same; not easy to splash. thus corresponds to a current electrode pressure can be reduced by half; welding zone deformation is small. The disadvantages are: high docking accuracy requirements; must be prepared when the welding foil with bedding on the roll plate and the workpiece, increasing the difficulties of automation. Copper electrode seam welding is an effective way to solve the coated steel seam welding, coating adhesion roller tray. Welding Wires Manufacturer, round copper wire, to the roll plate and plate. The copper was to roll continuous conveyor, roller tray and then continuous around another drums. The coating adhesion of copper only and does not pollute the rolling disk. Although the copper after the use to be scrapped. Coated steel tin plate, no other seam welding method can replace it. As the price of scrap copper and copper are similar, so the welding cost is not high. This method is mainly used in the manufacture of food cans.