Steel pipe rolling processing the progress of analytical technology

　　1 extending rolling parsing techniques

　　Mandrel rolling mill rolling with mandrel and roller, and therefore different from rolling, in the direction of the roll roll and core rod exist without the free deformation of contact zone. Because the free deformation zone is next rack is rolled, so for the correct understanding of core rod rolling mill of comprehensive characteristics, including the free deformation zone deformation forecast is very important.

　　The complex deformation prediction if the cache implementation algorithm of the past is unable to obtain high accuracy, high precision is required resolution. Considering the direction of rolling shear deformation, using common expansion plane deformation analytical approximate 3 d. The result shows that calculation value and experimental value is consistent.

　　Recently, with the development of computer technology, accelerate the full 3 d finite element analytic technology development, it also can be used to frame the influence of tension between the analytical and roll the speed difference between the billet and interpretation.

　　2 sizing rolling parsing techniques

　　When sizing rolling is adopted because the inside have no tool, so when rolling thick wall pipe rolling the interior surface of irregular shape. Using three roller mill, rolling the inside of a hexagonal shape. By using three dimensional finite element method analysis, made clear the inside edges happening mechanism and the countermeasures should be taken. In the near perfect circle ellipticity = 0.986 pass can obtain the basic uniform wall thickness, but in the near perfect circle ellipticity = 0.960 appeared six edges and corners clear inside groove.

　　Hebei Shengtian Pipe Fitting Group Co.,Ltd is mainly produce and export steel pipe fittings. Such as fluid pipe and line pipe etc.