公开(公告)号：US06705148B1

公开(公告)日：2004-03-16

申请号：US09792618

申请日：2001-02-23

Applicant: Timothy P. McCorry ,  Russ Manning ,  Randall F. Alder

Inventor： Timothy P. McCorry ,  Russ Manning ,  Randall F. Alder

IPC: B21D4104

CPC classification number: B31F1/008 ,  B21D19/16

Abstract: A method and apparatus for forming the free end of a length of metal foil wrap corrugated tubing, in which a free end of the tubing is first crimped against a mandrel, then folded to extend radially inwardly, then folded further to extend axially inwardly within the inside diameter of the tubing end, and then compacted axially to bring the corrugations into facing abutment with each other and tighten the formed end of the tubing against unwrapping of the metal foil. The crimping operation involves closure of a plurality of jaws around the free end of the tubing and deforming the tubing end against a tapering surface on an internal mandrel. The tubing is then gripped between jaws that form a radially indented channel in the periphery of the tubing, both to enhance the clamping action of the jaws and to isolate the formed end of the tubing from the remainder of the tubing. The clamped length of tubing is then engaged by a folding tool to fold the crimped end of the tubing radially inwardly, and then by a compacting tool further to fold the end axially into the tubing and then to compact the end portion of the tubing to form a tight tubing end joint.

Abstract translation: 一种用于形成一段长度的金属箔卷绕波纹管的自由端的方法和装置，其中管的自由端首先卷绕在心轴上，然后被折叠以径向向内延伸，然后进一步折叠以在其内部向内延伸 管端部的内径，然后轴向压实，使波纹彼此面对邻接，并拧紧管道的形成端部，防止金属箔的展开。 压接操作涉及围绕管道的自由端封闭多个钳口，并且将管端部变形抵抗内部心轴上的锥形表面。 然后将管道夹紧在形成管道周边中的径向凹陷通道的夹爪之间，以增强夹爪的夹紧作用，并将管形成的端部与管的其余部分隔离。 管的夹紧长度然后被折叠工具接合以径向向内折叠管的卷曲端，然后通过压实工具进一步将端部轴向折叠到管中，然后压紧管的端部以形成 紧密的管端接头。