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System and method for corrugating spiral formed pipe

A technology of spiral pipe and corrugation, applied in the field of pipe forming equipment

Inactive Publication Date: 2005-04-06
LINDAB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Another disadvantage of pipe forming equipment for forming continuous corrugated helical tubing is that the pipe forming equipment is limited to forming corrugated pipe only, and parts of the equipment need to be replaced in order to also produce smooth helically formed pipe

Method used

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  • System and method for corrugating spiral formed pipe
  • System and method for corrugating spiral formed pipe
  • System and method for corrugating spiral formed pipe

Examples

Experimental program
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Embodiment Construction

[0021] To discuss the need for a pipe forming apparatus capable of making smooth or corrugated helical tubing as well as cleanly cutting sections of corrugated helical tubing, an apparatus 10 for forming and cutting helical corrugations is described below. As shown in FIG. 1, apparatus 10 may be constructed using an existing spiral tubing forming apparatus and cutting device, such as those available from Spiral-Helix Corporation of Buffalo Grove, Illinois, Modified to include a bellows assembly 12. For a more detailed discussion of suitable pipe forming equipment and cutting devices, reference is made to US Patents 4,706,481 and 5,636,541, the entire contents of which are incorporated herein by reference.

[0022] Apparatus 10 includes a stationary forming head 16 which receives a thin strip of material, preferably sheet metal, and coils the strip of material around the interior of forming head 16 . A cylindrical mandrel 18 is held by a mandrel holder 20 attached to one end o...

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PUM

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Abstract

A method and apparatus for forming corrugated pipe is disclosed. The pipe forming apparatus includes a selectively operable corrugation module having an inner corrugation roller movably mounted relative to an outer corrugation roller via a cylinder assembly. The method inlcudes forming a length of spiral pipe without corrugations, engaging a corrugation module to introduce a desired length of corrugated pipe, and retracting the corrugation unit to allow a second length of uncorrugated pipe to form. The uncorrugated portion of the pipe is then severed cleanly using overlapping inner and outer cutting knives.

Description

technical field [0001] The present invention relates to a pipe forming apparatus for forming a helically formed pipe, and more particularly, the present invention relates to a pipe forming apparatus having a function of corrugating when helically forming a pipe. Background technique [0002] Spiral formed tubes are typically formed from a single metal strip. When forming the tube, the metal strip is rolled into a helix while adjacent edges of the metal strip are bent and pressed together to form a hem seam. When the helically formed tube reaches the desired length, the tube cutting device cuts off the tube. Spiral tubing is used in many areas, including vehicle oil filters, electrical conduit pipe, and HVAC (heating, ventilation, and air conditioning) piping. [0003] In applications such as cable duct pipe fabrication, it is beneficial to corrugate the pipe to increase its strength. Some pipe forming machines do this by corrugating the metal strip before it is fed into t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C37/12B21C37/20B21D15/04
CPCB21C37/127B21C37/121
Inventor 威廉默斯·P·H·卡斯特里库姆
Owner LINDAB