目前，国内带有立辊组的直缝焊管成型机大都采用双半径孔型。
The double radius hole type was commonly adopted for the forming machine of straight weld pipe with vertical roller in domestic present.
介绍了拉伸弯曲矫直机的特点及工作原理，对生产中常见问题如弯曲辊组切入量、带钢在张力辊上打滑及伸长率损失等进行了分析讨论。
The problems in production such as amount of draught of the bend rolls, glide of steel strip on the bridle rolls, lose of the elongation and so on are analyzed and optimized.
其特征在于本轧机包括换辊液 压缸（1）、换辊小车（2）、轧钢机辊组（3）、立柱（4）、蜗轮升降机构（5）、U型 架（7）、转动转耳（8）、连接螺栓（9）；
The mill comprises roll changing hydrocylinder (1), with rolling mill group (3), roll changer (2), post (4), worm wheel lifting gear (5), U-shaped frame (7), rotation ear (8) and bolt (9).
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