The cold-bent pipes with different diameters must be equipped with the pipe-bending dies matching with them.
不同管径的冷弯管需配置与之匹配的弯管模具。
2
The invention relates to a process for forming and welding closed-end cold-bent section steel, belonging to the technical field of the cold bending and forming.
本发明的一种闭口冷弯型钢的成型与焊接工艺，属于冷弯成型技术领域。
3
This paper introduces the producing and technology characteristics of the square and rectangular double-welded seam pipe. And designing of the pass parameters of the cold-bent channel steel.