设备改造后明显减少了人为硬弯，提高了成型稳定性。
After adopted equipment, manual bend is greatly reduced and forming stability is improved.
介绍了螺旋焊管生产中对头焊带钢的硬弯现象发生原因，对钢管质量的危害及防止措施。
The discussion involves such aspects as the cause of strip folding occurring in butt-welding process of spiral weld pipe, negative influence by such failure on pipe quality and preventive actions.
在螺旋焊管生产过程中，钢带产生人为硬弯的主要原因是对头焊工序中钢带不能对齐所致。
During the Spiral welded pipe production, the main reasons of manual bend caused in strip steel are unusual aline of strip steel in strip steel connection weld process.
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