METHOD AND DEVICE FOR MANUFACTURING A CORRUGATED METAL PIPE

摘要

A corrugating unit is used which presses a first corrugation into the pipe which is moved in its longitudinal direction through the corrugating device. The spacing between the wave peaks is subsequently reduced, for obtaining a second corrugation, by a clamping unit composed of two separately arranged clamping devices resting against the pipe. The pipe provided with a first corrugation is pressed continuously by the first clamping device against a fixed point realized by the second clamping device, which, in the position of operation, is arranged, in relation to the clamping device, in axial direction. behind the first clamping device. Both clamping devices are removed cyclically from the pipe and are moved back into a new position in the opposite direction of the direction of movement of the pipe and, in this new position, again rest in the two different areas against the pipe.

主权项

1. Method of manufacturing a corrugated metal pipe, the corrugation having wave peaks and wave valleys, in which an corrugating device is used which impresses a first corrugation as a preliminary corrugation into a pipe which is moved in its longitudinal direction through the corrugating device, with a given axial spacing between the wave peaks, and in which the spacing between the wave peaks is subsequently reduced for obtaining a second corrugation by a clamping device resting against the pipe, said method comprising the steps of
using a clamping unit that has two separately arranged clamping devices which are both placed stationary in the radial direction, one behind the other, placed tightly against the pipe provided with the corrugation; moving a first clamping device equipped with a drive in the position of operation with the same speed as the pipe together with the pipe; continuously pressing the pipe provided with the corrugation through the first clamping device against a fixed point realized by the second clamping device which is also provided with a drive that is arranged in relation to the corrugating unit in the axial direction behind the first clamping device; and cyclically removing both clamping devices from the pipe and moving each back in the opposite direction of the movement of the pipe, and in this new position, are placed again in the two different areas against the pipe.