Also known as seam welding seam welding, welding electrode with a pair of cylindrical rollers instead of spot welding electrodes, welding workpieces between mobile roulette, producing one nugget mutually overlapped sealing seam welding workpieces together Methods. Generally pulse current or AC current amplitude, can also be three (single) phase rectifier, frequency, high frequency DC current. Seam welding is widely used in oil drums, cans cans, radiators, aircraft and automobile fuel tanks, rockets, missiles in sealed container sheet metal welding, general welding veneer thickness less than 3mm. Seam welding seam composed by a spot welder brand in Guangdong, according to core melt overlap, divided into airtight seam roll spot welding or soldering. Formation process for the formation of each solder joint, the presence of the spot welding as pressing, heating, melting and cooling crystallization three stages, but with a greater difference spot welding. Because inevitably shunt phenomenon, so the current field and the distribution of the thermal field of welding zone has its own characteristics; and transmit pressure, ohmic heating roll pan constantly rotate transform welding position, so that the current field, thermal field distribution and crystalline melting zone Features are concerned with the speed of changing positions. Application Number / Patent Number: 201,320,373,605.6 utility model name: compressor welder Product Description: The utility model discloses a compressor welder welding Guangdong brand businesses, including racks, storage capacitor boxes, welding module, the drive mechanism and control devices, welding module, the drive mechanism and control means are located in the rack, storage capacitance box, the drive mechanism connected with the soldering module, the control device are connected to the storage capacitor box, the drive mechanism and welding module, welding module includes cylinder, welders and welding mold bit. The utility model adopts a position of power multiple welders to simplify the structure, set the relevant parameters by the control device and associated control data, can simultaneously control multiple welding station work and drive mechanism can meet all projection welding products welding process requirements, but also to reduce the one-time investment in equipment, in addition to centralized control by the control device not only can improve the accuracy of Guangdong patented welding welding manufacturers to improve product quality, but also makes the operation more convenient, fast and save space. Guangdong brand welding, welding machines, welding equipment provided by Huashi Huashi Huizhou City Welding Equipment Co., Ltd .. Huizhou City Huashi Welding Equipment Co., Ltd. (www.hwashi.com) strong, credible, in Huizhou, Guangdong distribution equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Chivas welding equipment and you hand into the brilliant, for a better future!