welding process in roll forming machine

In a tube mill line, welding is a crucial process used to join the edges of metal strips to create tubes and pipes. This process involves shaping a flat metal strip into a cylindrical form and welding the seam to create a continuous tube.

As the metal strip is formed into a cylindrical shape, the edges are brought together. Proper alignment of these edges is critical for a strong and uniform weld.

welding methods in a tube mill line

Several welding methods can be employed in a tube mill line, depending on the material, tube size, and required quality of the weld:

• High-Frequency Induction Welding (HFIW): The most commonly used method in tube mills. A high-frequency electrical current is induced in the edges of the strip, heating them to a point where they can be fused under pressure. This method is fast, efficient, and suitable for a wide range of tube sizes.
• High-Frequency Resistance Welding (HFRW): Similar to HFIW, the electrical current is passed directly through the edges to heat them. This method is also widely used in tube mills.
• Laser Welding: A laser beam precisely heats the edges of the strip, causing them to melt and fuse. Laser welding is used for applications requiring very high precision and minimal heat-affected zones, such as in high-end automotive or aerospace tubes.

• TIG Welding (Tungsten Inert Gas): TIG welding is used for high-quality welds, often in applications requiring corrosion resistance or where the material is non-ferrous. It’s slower but produces high-quality, clean welds.
• Plasma Welding: An advanced version of TIG welding, plasma welding uses a plasma arc to achieve deeper penetration and higher welding speeds. It’s used for thicker materials or where a very strong weld is required.

Welding is an integral part of the tube mill line process, enabling the continuous production of high-quality tubes and pipes for a wide range of industrial applications.