带有立辊组的成型机孔型的改造

目前，在国内带有立辊组的直缝焊管成型机大都采用双半径孔型，生产中发现，这种孔型在带钢出现月牙弯时，成型过程中带钢横向稳定性差，随着带钢厚度增大，立辊参与变形较大易损坏。本文提出了第一架水平辊采用反弯孔型，以后各架采用双半径孔型按非均匀变形法分配各轲次变形量的一种组合孔型设计，它克服双半径孔型的不足并保持其优点。

Rebuilding the Hole Type of Forming Machine With Vertical Roller Set

The double radius hole type was commonly adopted for the forming machine of straight weld pipe with vertical roller in domestic present. The practice make known that the stability of strip steel become poor in the forming process while the strip steel appear crescent moon bend in the hole type, the vertical roller easy to destroy as result of the deformation with thickness of strip steel. The paper state a combined hole type design measure which adopting non-homogeneous deformation in each frame including closed entrance frame except for the first horizontal roller frame using bend hole type in reverse, and overcome the shortcomings of double radius hole type measure.