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Laser spot welding machine: classification and difference

Laser spot welding machines are also called resistance welding machines, and are usually divided into three categories according to the nature of the welding power source:

  1. AC spot welding machine;
  2. Energy storage spot welding machine;
  3. DC spot welding machine.


AC spot welding machine

Precision AC spot welders generally refer to spot welders with a power below 16KVA. Most of them are desktops. They are usually divided into two types: pedal and pneumatic. This welder uses AC discharge. On this basis, it uses single pulse, multi pulse, Various control methods such as cycle, time, program, etc. It can also implement single point welding, continuous welding automatic control, human control, complete specifications. Mainly used for welding tungsten, molybdenum, iron-nickel, aluminum, stainless steel, silver and other metal sheets, wires and bars.

High-power AC spot welding machine generally refers to a spot welding machine with a power above 16KVA, mainly vertical pneumatic, high-power AC spot welding machine performance characteristics: direct pressure mechanism, good follow-up performance, fast welding speed, use Long life, low noise, safety, easy to use, water-saving forced cooling method, high-strength body structure, simple and practical upper insulation, main circuit adopts high-power SCR non-contact switch, high conductivity, low power loss, domestic AC spot welding machine In the secondary current loop of the main transformer, the upper secondary output of the main transformer adopts multilayer high-toughness, high-conductivity copper soft tape, and is U-shaped connection; the service life is greatly improved, and the lower secondary output adopts an integrated direct connection mechanism. Loss is minimized. The main circuit of Welder’s AC spot welding machine adopts water-cooled high-power SCR components, with strong, stable and reliable output power. With rigidity against shock and vibration, it can prevent the electrode tip from sliding when pressurized and realize stable welding. Mainly used in the hardware, electromechanical and automotive industries. The welding precision and welding performance of the AC machine is higher than that of the energy storage machine.

Energy storage spot welding machine

Precision energy storage spot welding machine. This series of spot welding machines adopt capacitor energy storage charging and discharging welding. It has the characteristics of small impact on the power grid, concentrated welding current, fast discharge speed, strong penetration, and small heat-affected area on the welding surface. It is suitable for Used for welding various metal sheets, wires and rods such as copper, nickel, stainless steel and iron. And the welding of various small relays, low-voltage electrical appliances and reeds, silver contacts, and copper wires.

High-power energy storage spot welders generally refer to energy storage spot welders with a power above 800J (joule). Features: Wide use. In addition to general soft iron, stainless steel, copper, aluminum, alloys and general non-ferrous metals can be welded. And the welding performance is excellent. Since the output and input are completely separated, it is not affected by changes in the external power supply and maintains a constant power output.

The performance of the product is a bit worse than that of DC and AC machines. The appearance of the solder joints and the firmness of the soldering are not bad, and it is suitable for the processing of product parts that are not very demanding in appearance. The disadvantage is: energy storage, energy storage, as the name suggests, is to first store the electricity in the capacitor of the device, and it needs to be charged before each discharge, and the capacitor needs to be replaced after the device is used for a period of time.

Inverter DC spot welding machine

The principle of the DC spot welding machine is to use technology to invert AC power into DC power for welding.

As we all know, the electricity we use, whether for household or factory electricity, is AC. That’s because AC has the advantages of easy transmission and low cost. Its advantage is the disadvantage of DC. Its disadvantage is the advantage of DC. They are complementary. Yes, DC power is more stable and safer when used in equipment than AC power. Like the AC machine, the DC machine is mostly desktop, usually divided into two types: pedal and pneumatic. The welding machine adopts direct current discharge, which can use various control methods such as single pulse, multi-pulse, cycle, time, and so on. It can also implement single point welding, continuous welding automatic control, human control, complete specifications. Mainly used for welding tungsten, molybdenum, iron, nickel, aluminum, copper, stainless steel, silver and other metal sheets, wires and bars.

Compared with AC and energy storage welding machines, the advantages of DC welding machines are: compact structure, smaller volume, strong overload capacity, low energy consumption, superior performance, and higher welding precision. The disadvantage is that its cost is a bit more expensive compared to the first two welding machines.

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