High-Frequency Welding (HF Welding) is a welding method used to join metals or produce metal pipes. This method brings materials together using high-frequency electrical current, typically ranging from 100 kHz to 450 kHz. HF welding is commonly associated with two main processes:
1. High-Frequency Resistance Welding (HFRW): In this method, an electrical current is passed between two metal surfaces, and the heat energy generated due to this current's resistance is used to join the metals. It is often used to join the ends of tubes or the edges of sheets. This method is frequently employed in industrial production and is preferred in fields such as automotive, HVAC (Heating,
Ventilation, and Air Conditioning), and pipe manufacturing.
2. High-Frequency Induction Welding (HFIW): In this method, two metal plates or strips are heated by a high-frequency electromagnet or induction coil. When the metal plates are heated, their temperatures can reach a melting point at the welding point, allowing them to be joined together. This method is commonly used for pipe production.
HF welding methods are suitable for high-speed and automated processes for joining large quantities of metal. They can produce high-quality and strong welds. As a result, they are widely used in industries such as construction, automotive, the energy sector, and many others.