| 主权项 |
1. An apparatus for forming spiral pipe and cutting one or more openings in the spiral pipe, the apparatus comprising:
a spiral pipe forming station, the spiral pipe forming station comprising:
a feeding device for feeding a continuous metal strip;a bending device that receives the metal strip fed from the feeding device, the bending device having for a fixed rolling element that continuously bend the metal strip at an angle offset from a central axis of the fixed rolling element to form a spiral pipe having a longitudinal axis and a sidewall; anda flange forming device for forming side edges of the metal strip into mating profiles configured for forming a spiral locking seam; a cutting station for cutting the one or more openings through the sidewall of the spiral pipe, the cutting station comprising a cutting device movable in a direction of the longitudinal axis of the spiral pipe; wherein the cutting device is operated to selectively cut through the sidewall of the spiral pipe to define the one or more openings as the pipe forming station forms the spiral pipe. |
