초록 ▼

An apparatus for crimping the leading edge of continuously produced spiral pipes is disclosed. The apparatus includes upper and lower passive crimping rollers, which are rotatably mounted adjacent each other in a holder. The holder is carried by a guide rail system which slides in the axial directio

An apparatus for crimping the leading edge of continuously produced spiral pipes is disclosed. The apparatus includes upper and lower passive crimping rollers, which are rotatably mounted adjacent each other in a holder. The holder is carried by a guide rail system which slides in the axial direction of the spirally moving pipe. The holder and rollers are rotated between a down position, where the continuously produced pipe will move freely over the crimping apparatus, and an up position where the leading edge of the pipe will pass between the upper and lower crimping rollers. When the crimping apparatus is in the up position and the leading edge of the pipe is between the crimping rollers, the lower roller is raised until the rollers cooperate to crimp the leading edge of the pipe. The spirally moving pipe will exert a force on these rollers, which causes the guide means, which carries the rollers, to move axially with the pipe. The crimping rollers will crimp the entire circumference of the pipe\s leading edge as the crimping rollers move axially with the pipe and the leading edge of the pipe rotates between the rollers. When the entire leading edge of the pipe has been crimped, the holder and rollers are rotated to their down position, so that the pipe production can resume without obstruction by the crimping apparatus.

대표청구항 ▼

For use with a machine for continuously producing spiral seamed pipe from a metal strip including drive means for continuously feeding the strip through the machine, means for forming the strip into a spiral cylinder so that the outer edges of the strip are adjacent each other, means for joining the

For use with a machine for continuously producing spiral seamed pipe from a metal strip including drive means for continuously feeding the strip through the machine, means for forming the strip into a spiral cylinder so that the outer edges of the strip are adjacent each other, means for joining the adjacent edges to produce a pipe having a spiral lockseam, and the leading edge of the continuously produced pipe moving in an axial direction as it rotates, an apparatus for crimping the leading edge of the pipe comprising: means for holding a plurality of rollers; first and second rollers rotatably mounted in the holding means adjacent each other, each roller having a corrugated circumferential edge; guide means for carrying the holding means and being slidable in the axial direction of the pipe; means for moving the holding means between a first position where the continuously produced pipe can move freely by the holding means and rollers, and a second position where the leading edge of the pipe will pass between the corrugated edges of the first and second rollers; and means for lifting the first roller towards the second roller when the holding means is in the second position and the leading edge of the pipe is between the rollers, so that the corrugated edges of the rollers cooperate to crimp the pipe\s leading edge, and whereby the moving pipe exerts a force on the rollers and holding means which causes the guide means to slide in the axial direction of the pipe, and the pipe\s leading edge rotates between the first and second rollers as it moves axially so that the rollers can crimp the circumference of the leading edge.