Spot welder is based on the resistance of the two workpieces, high current through the workpiece generates heat to be melted. Most of the material is steel or stainless steel.

Resistance for Copper and Aluminum is small, not easy to generate heat to weld by AC welder.

Based on some special material will recommend capacitor discharge welder or MFDC welder.

1. Short welding time, usually 0.1sec per spot. Heat is concentrated and workpiece is less deformed.
2. No refillable consumables required, such as welding rod, oxygen, acetylene, argon…etc.
3. Simple operation, easy for beginner to get started, no need professional operator.
4. No harmful gas or and no strong light damage.
5. High production efficiency, can work with semi-automatic or fully automatic system.

Electrodes are usually made of copper alloys with high conductivity and medium hardness, and chromium copper (CuCr) or chromium zirconium copper (CuCrZr) which are widely used.

Water cooling is one of important thing for resistance welder. But if welder is low usage without installing cooling system could acceptable. Operator can check if the electrode is cooled down during the rest of spot welding. If the electrode is too hot during use, would recommend install a water cooling system.

The cooling water should be within ±3 degrees of indoor temperature, and the water quality should meet the industrial water standards. If the water quality is poor, the scale deposited will easily block the cooling water pipe, resulting in insufficient cooling. In severe cases, the welding transformer, S.C.R (thyristor) or other components will be damaged. The temperature of the outlet water must be confirmed. If the temperature is too high, the flow or temperature needs to be adjusted.

1. When the copper plate and electrode copper get hot, the current through the workpiece is not well, will cause poor spot welding performance.
2. Deterioration of copper plates and electrodes, will cause poor spot weld permanently.
3. Welding transformer, S.C.R (thyristor) or other parts will be easily damaged.

The initial color of electrode or copper plate on the machine is copper color, but the color will become dark if oxidation or there are oil stains on it. It can be cleaned by using cloth or fine sandpaper or applying metal polish wiped on surface of copper; it will looks like a new one.

*Note: Cannot wiped metal polish between two copper connect.

If the internal color still looks darker, it may because of insufficient cooling water or poor copper connect, and cause overheating and deterioration. Will recommended to check the actual problem then to improve or replace it with a new electrode (the blackened electrode has poor conductivity).

F.R.L is combined with Air Filer, Regulator and Lubricator Modular.

Air Filter: Filters remove water, dirt and other harmful debris from an air system by manually or automatically.

*The filtering is limited, air needs to be purified and dewatered in front of F.R.L (before through the F.R.L), otherwise the pressure regulator, electric value or welding cylinder will be damaged.

Regulator: Adjust and control the air pressure of the system to ensure that down-line components do not exceed their maximum operating pressures.

*Recommend setting with 2~5bar.

Lubricator: Reduce the internal friction in equipment by releasing a controlled of oil to ensure proper pneumatic component operation and increase their operation lifetime. Operator can adjust the oil drip though the visible area. Will recommend to drop once every 7 times of welding.

*Lubricating by using ISO VG32, please refuel when oil is not enough in the oil cup.