Pipe manufacturing method involves providing sheet metal and bending sheet metal into tube shape such that two edges of sheet metal face each other, where pipe is bent in form-free bending device

摘要

The pipe manufacturing method involves providing a sheet metal and bending the sheet metal into a tube shape such that two edges of the sheet metal face each other. Latch-like sections (5a-5e) are provided, where every latch-like section is curved around a third edge forming the latter edge. The pipe (1) is bent in a form-free bending device.