System and method for radially expanding hollow cylindrical objects
AssigneeHydroPro, Inc.
InventorRussell D. Wasson
Life of this patent
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Abstract
A system and method for radially expanding hollow cylindrical objects, through the use of a tube expansion tooling, affixing a mandrel in place, the tooling rendered operative through the generation of hydraulic pressure, to provide the axial force necessary for pulling of the mandrel into the tool, and the mandrel having concentrically applied thereon various spacers, cams, and curved segments, which when the drawbar of the mandrel is pulled, manual forces are generated through the cams and segments into an expansion capacity to force the expansion of any tube in which the mandrel locates, to be expanded into a tight binding fit within a tube sheet or any other bore hole formed in equipment.
Claims6
A system and method for radially expanding hollow cylindrical objects, comprising:
- a mandrel assembly, said mandrel assembly including a drawbar, and a collar, said drawbar engaging at one end within said collar;
- a hydraulically operative pull tool, a handle with operative controls provided upon said tool, said mandrel assembly engaging within said pull tool;
- a hydraulic supply provided for fluid communication with said pull tool, and supplies to said pull tool the fluid pressure to pull the drawbar of the mandrel assembly partially into said pull tool;
- spacers, cams, and curved die segments concentrically provided adjacently upon said drawbar of the mandrel assembly;
- and
- wherein upon actuation of said tool hydraulic pressure exerted in the tool actively pulls the drawbar of the mandrel assembly partially therein to mechanically contract the cams against the curved die segments to expand said segments into contacting and expanding the hollow cylindrical object in which the mandrel assembly locates.
Dependencies are inferred from the claim text.