Directly forming square tube unit
Only one set of rolls can continuously produce square and rectangular steel pipes within certain range. It adopts the international advanced multi-radius combined forming process and high-frequency welding, and is formed by multiple symmetrical bending. Specifically, it can be divided into small-side bending, side-side bending, closed free bending, high-frequency welding, finishing and straightening, and sawing to produce pipes with accurate dimensions and excellent quality.
Features
① Adopting advanced multi-point pre-bending combined forming process, and the rolls are shared. One set of rolls can solve the forming problems of all square and rectangular tubes within a certain range, which can save a lot of roll costs and roll changing time./
② Electric and hydraulic are adopted, and the rollers can be changed quickly
③ Computer-controlled automatic mode is adopted for changing production specifications. The deformation parts are the four corners of the square tube, no unnecessary deformation process, reducing energy consumption and equipment load

| The main parameters | |
| Material | The raw material is hot-rolled and cold-rolled strip steel slitting coils |
| Product type | Square tube and rectangular tube |
Square tube | 50 x 50 – 600 x 600 mm |
| Rectangular tube | 50 x 70 –400 x 600 mm |
| Pipe wall thickness range | 1.5 mm – 22.0 mm |
| Tube length | 6.0 m - 24.0 m |
| Production speed | 8- 45 m/min |
Welding method | High frequency welding, solid state 400- 1200kW |
Molding method | Directly forming square tube |