Contact Us
TEL: +86-511-85722368
Mob: +86-15805290338
Address: Pan Zonglu, Ding MAO Development Zone, Zhenjiang City, Jiangsu Province
Home > News > Content
What Are The Disadvantages Of Spot Welding Machines?
Sep 07, 2018

Disadvantages of spot welding machine: welding machine in the use of the process around the welding machine will produce a certain magnetic field, arc combustion will produce radiation to the surrounding, arc light has infrared, ultraviolet light, and other harmful substances such as metal vapor and soot, so the operation must do enough protection measures. Welding is not suitable for the welding of high carbon steel. Due to the crystallization, segregation and oxidation of weld metal, the welding performance of high carbon steel is poor, and it is easy to crack after welding, resulting in hot cracks and cold cracks. Low carbon steel has good welding performance, but the process should also be properly operated, rust removal cleaning is more tedious, sometimes the weld will appear slag cracks such as blowhole bite edge defects, but proper operation will reduce the occurrence of defects. Spot welding machine is to melt the solder and the welding material on the electrode by using the high temperature arc produced by the short circuit between the positive and negative poles to achieve the purpose of combining them. The structure of the welding machine is very simple, that is, a high-power transformer 20V AC to low voltage, high current power supply, can be DC or AC. The electric welding transformer has its own characteristics, that is, the characteristic of voltage drop. In addition to the primary 220/380 voltage conversion, the secondary coil also has tap voltage conversion, but also the use of iron core to regulate, adjustable iron core.. Welding machine is generally a high-power transformer, made of the principle of inductance, inductance in The spot welder melts the solder on the electrode by the high voltage arc produced by the short circuit between the positive and negative poles to achieve the purpose of combining them. Voltage is applied between the electrode and the workpiece, and the arc is ignited by scratching or contacting. The electrode is melted and the base metal is heated by arc energy. 1. The main spot welding machines used by industrial and mining enterprises are: AC arc welding machine, DC welding machine, argon arc welding machine, carbon dioxide shielded welding machine, butt welding machine, spot welding machine, submerged arc welding machine, high frequency welding machine, flash butt welding machine, pressure welding machine, laser welding machine. The difference between AC welding machine and DC welding machine is that AC welding machine is generally used in steel structure manufacturing units or general machinery or agricultural machinery manufacturing units. DC is mainly used in the manufacture of pressure vessel boilers, pipes, or important structural manufacturing units for welding machines.