china light keel roll forming machine_china light keel roll forming machine

HF tube mills operate by feeding steel strips through a series of rollers that gradually shape the strips into a tubular form. The edges of the bent steel strip are then subjected to high-frequency electromagnetic fields, which induce currents in the material. This induction heating brings the edges of the steel to a high temperature, allowing them to be welded together without the need for additional materials or heat sources.