Design of Six-roll Straightener for Large-sized Light-wall Steel Pipe

Elaborated here in the article is a method for designing a new type six-roll straightener. The design method involves some modification details of the straightener,including improvement of structures of both the top and low rolls,extending the length of the straightening roll body,expanding the enveloping line length per length unit between the work-piece and the roll,and adopting a new type lateral roll device,etc. The above mentioned innovative design measures lead to elimination of certain quality defects of the large-sized light-wall pipe that are prone to being caused during operation of the convenient six-roll straightening mill,including pipe side-slipping,oval-shaped outside circumference,and cross-section distortion etc.,which greatly increases the straightening precision and quality of the finished pipe.