The task of the straightening process is to eliminate the bending of the pipe produced during rolling, transportation, cooling and heat treatment, and also to reduce the ellipticity of the pipe.
First, the type of steel pipe straightening machine and application
Straightening of the steel used for mechanical (or hydraulic) pressure straightening machine, inclined roller straightening machine and tension straightening machine several forms. Pressure straightening machine is simple, suitable for diameter 38 ~ 600mm, bending degree of 50mm / m above the steel straightening. It is low productivity, the need for artificial auxiliary operation, straightening quality is not high, and more for the straight pipe and pipe straightening. Currently widely used is the inclined roller straightening machine. As the straightening roll is placed obliquely. So the steel pipe in the straightening process for the spiral movement, can make the steel pipe in the straightening roller repeated several times longitudinal bending, the results can be used for a few straightening roller to complete symmetrical straightening of steel pipe.
The advantages of inclined roller straightening machine are:
(1) Since the straightening process is continuous, it has a high productivity, and can achieve on-line straightening;
(2) As the straightening roller up and down spacing adjustable, in addition to ensuring the straightening accuracy of steel, but also reduce the oval tube;
(3) As the straightening roller has a special roller-shaped curve, which ensures that the steel pipe and roller have a corresponding contact area, which can ensure the straightening quality of steel pipe.
