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Electric welding equipment or inert gas?
Welding is generally divided into two types of process, which include fusion joint welding and pressure joint welding. Fusion joint welding is carried out without the use of force. Here, two workpieces are melted at the joints and fused together with or without filler materials. Press-joint welding creates joints with the application of force. The most common fusion joint welding processes include electrofusion welding and welding with inert gas.
Welding basics
- Thoroughly remove rust and paint from the workpiecesThoroughly remove rust and paint from the workpiecesThoroughly sandblank-welding parts togetherWeld seams only with spots, which makes it possible to make corrections For your own safety, wear sturdy clothing that covers the workpiece as completely as possibleWear leather glovesWelding helmet or hand shield must be usedEveryone in the immediate vicinity must wear eye protection
Accessories electrofusion welding
An electric welding machine converts the alternating current of the mains, which has a high voltage and a low current intensity, into an alternating current with a low voltage and a high current intensity. For this purpose, either a welding transformer or an inverter is required in addition to the electric welding machine. Welding transformers are usually large and often unwieldy compared to inverters. In the inverters the conversion of the current is electronically controlled.
Execution during electrofusion welding
The execution of electrofusion welding is very simple. A welding electrode serves as the positive pole – anode – while the workpiece is the negative pole. The bare part of the workpiece is connected to the pole by means of a clamp. The other pole has an electrode holder. With the help of this, the electrode holder is guided to the welding point.
The resulting short-circuit creates the electric arc. With this arc and the bundled energy, high temperatures are generated which cause the workpieces to be processed to melt and at the same time melt the electrode. After the workpieces have cooled down, they are firmly connected.
Accessories inert gas welding
Various gas mixtures and a mains connection are required for inert gas welding. The gas mixture used in each case depends on the material as well as on the welding task in question. With the help of the shielding gas welding not only thin sheets can be welded together safely and stably but also strong materials, thick rods or pipes.
Inert gas welding Procedure
The gas mixture is fed to the burner together with the wire electrode through a hose package. The attached nozzle ensures an even gas flow. This can regulate the gas quantity directly at the pressure valve. With the help of a switch on the pistol, both the gas supply and the electrode supply are started.
The melting wire melts drop by drop and thus reaches the welding point. Particularly durable and high quality welds can be achieved in gas-shielded welding with a continuous gas flow and with a continuous feed rate of the wire electrodes.