When stretching large whole ribbed pipe wall broad into plane broad in stretcher, it is inevitable to cause the average transverse bending along the span of wall broad.

• 针对在常规展开机上展开带筋管为平面壁板过程中不可避免地产生沿壁板全长方向的均匀横向弯曲的问题,设计了新型的带筋管壁板展开机,可以减小横向弯曲和减少后续工序。