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US 10,207,305 B2Granted
Method of applying lubrication to legs of a hairpin tube
AssigneeBrazeway, Inc.
InventorsDavid W. Skrzypchak, Vikas Somani, Brian J. Christen
Life of this patent
Estimating the term…
Abstract
A method and system for manufacturing a hairpin tube. The method includes cutting a coil of tube to provide a plurality of lengths of tubes, and bending each length of tube to form a plurality of hairpin tubes. A lubricant is then atomized with an injector nozzle, and injected into at least one open end of each hairpin tube. After lubricating the hairpin tubes, the legs of each hairpin tube are expanded.
Claims17
A method for manufacturing a hairpin tube, comprising:
- cutting a length of tube from a coil of tube;
- atomizing a lubricant with an injector nozzle;
- lubricating an interior of the length of tube with the atomized lubricant;
- and
- expanding all or a portion of the length of tube,
- wherein an amount of the atomized lubricant used to lubricate the interior of the length of tube is based on an interior surface area of the tube as calculated using the following formula:
- area=ID·π·L, where ID is an inner diameter of the tube and L is a length of the tube;
- and
- wherein the lubricant is atomized using compressed gas that directly communicates with the injector nozzle through a single supply line.
6 more elements
A method for manufacturing a hairpin tube, comprising:
- cutting a length of tube from a coil of tube;
- placing the length of tube on a conveying device that moves the length of tube relative to an injector nozzle;
- atomizing an essentially solvent-free lubricant with the injector nozzle;
- lubricating an interior of the length of tube with the atomized lubricant;
- and expanding all or a portion of the length of tube, wherein the lubricant is atomized using compressed gas that directly communicates with the injector nozzle through a single supply line;
- and wherein the injector nozzle is fixed relative to the conveying device or the injector nozzle is movable relative to the conveying device.
3 more elements
Dependencies are inferred from the claim text.