High Precision Direct Square Roll Forming Machine ERW Square Tube Mill

The high-frequency pipe production line is specialized equipment to produce high frequency straight seam welded pipes for structuralpipe and industrial pipe with 40mm×40mm -90mm×90mm and wall thickness of 1.5mm-4.0mm.

Direct Square to Square Pipe Mill/Tube Mill

Compare with round into square&rectangle forming way,this way is better for the shape at the edge of cross section,comparatively, semi-diameter of inner arc is Small, and the brim is flat, outlook is regular.

It is directly roll the steel strip and bend it to square & rectangular shape, then weld it to finish the formation.

Characteristics and Advantages:

1).Compare with round into square&rectangle forming way,this way is better for the shape at the edge of cross section,comparatively, semi-diameter of inner arc is Small,and the brim is flat,outlook is regular.

2).the whole line load is low ,especially the sizing parts.

3).The width of steel strip is small about 2.4-3% than round into square & rectangle,it can save the consume of raw material.

4).It adapt the multi-point bending way, avoid the axial force and side abrasion, reduce the forming step while ensure the quality,meanwhile it reduce the power wastage and roller abrasion.

5).It adapt the combined type roller on the most of the stands,it realize that one set of roller can produce dozens of square&rectangle pipe with different specification,it decrease the store of roller,low the cost about 80% on roller, Fast the bankroll turnover, short the time one new product design.

Technical flow

Scrolling up→ Uncoiling → Shear and Welding→ Spiral accumulator→ Forming → H.F. induction welding→ External burr removing→ Cooling → Sizing→ Flying saw → Run out table →Inspecting→ Packing→ Warehouse

We can design and manufacture square tube machine according to customer’s requirement.