The inner -roller,on important tech nique equipment,has both function o f forming and welding,the shape of the roller have important effect on forming,weldin g process,and welding quality.

• 内压辊是螺旋缝高频焊中很重要的工艺设备,它兼有成型和焊接的双重任务,其形状对成型、焊接过程及钢管质量尤为重要。