Our forming mill adopts rotary vertical roll cluster which is developed by absorption of advantages of cage forming. It shortens length of free bending. The different bounce back as a result of different steel grade and thickness can be adjusted very easily, which is the very important Roll Compatibility to the tube manufacturers. Thus buyer can reduce the investment on rollers. In fact this method especially fits for small purchase order, variety of product specifications, and high material grade.

 

The rolls at break down are compatible. Advanced technique in roller compatibility not only avoid the hard work of roll change, but also greatly improve the production efficiency and work environment. In addition, the roller cost and management cost are decreased too.

 

Optimized forming 

Compatibility of rolls should not sacrifice the forming quality and product quality. Instead it should be based on scientific analysis and steel transformation pattern, and minimize the adverse effect of roll compatibility. At the same time, we should fully utilize the function of adjustability of roll position to achieve the product quality that other tube mill can not get.

 

Edge continuous bending technology is adopted; accurate forming curvature; low bouncing back when the steel grade is high; good ends forming and smooth entrance to fin pass; even and reasonable power distribution of the mill.

 

W-bending on first stand is critical to the complete pipe forming. If the curvature is too small, the so called “peach head” will happen. If the curvature is too large, the so called “apple concave” will be created then. Once any of them is there, it is fatal to pipe quality, and can not be cured by fin pass and sizing. Our technology is a good solution for the key technical issue.

 

Module roll curve covers a wide range of pipe size; JUANTIE can adapt the variation of bounce back due to different material grade. Our mill can be adjusted easily and quickly to meet different material grade and thickness.