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Reflare tool and process

A tool and port technology, applied in the field of metal bonding, which can solve problems such as failure to prevent leakage

Inactive Publication Date: 2011-07-20
LENNOX IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sealing gaps may not prevent leaks as sealant ages

Method used

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  • Reflare tool and process

Examples

Experimental program
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Embodiment Construction

[0018] Conventional securing of crimp flange joints suffers from several significant deficiencies. Conventional hemming processes typically use multiple moving parts, increasing the complexity of tooling and the cost of the joining operation, as well as increasing the likelihood of future failure of the joint. In some cases, such as when the curled flange is part of a heat exchanger for a furnace or similar application, exhaust gases from the combustion of heating fuel may leak from compromised conventional joints, for example for heated buildings health or other risks to its occupants. For at least these reasons, there is a need for a splice and splice crimping process that reduces cost and increases splice reliability.

[0019] To address such deficiencies of conventional practice, the present disclosure describes a flare crimp joint between a flange and a panel port, a re-flaring tool for forming a flare crimp joint, and a method for forming a flare crimp joint. A novel a...

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Abstract

The invention relates to a reflare tool and a process. A flaring body has first and second opposing ends. A perimeter surface intersects the first end, and a flaring surface is located between the perimeter surface and the second end. The perimeter surface has a first cross-sectional profile with a first area, and the flaring surface having a second cross-sectional profile with a second area less than the first area. The perimeter surface and the flaring surface are joined by an inside, rounded corner. A crimping body has a top surface and an opposing bottom surface, and an interior surface that forms defines a passageway that connects said top and bottom surfaces. The interior surface has a third cross-sectional profile with a third area larger than the first area. The flaring body is slidably captureable in the passageway. The interior surface further has a crimping channel that extends along at least a portion thereof and terminates at the bottom surface.

Description

[0001] Cross References to Related Applications [0002] This application claims U.S. Provisional Application Serial No. 61 / 295,501, filed January 15, 2010, by Shailesh S. Manohar et al., entitled "An Improved Heating Furnace for HVAC System" rights, the entire contents of which are incorporated herein by reference. This application is related to the commonly assigned and incorporated herein by Donald N. Zimmer et al. on July 12, 2010, entitled "Heat Exchanger Expanded Overlap Joint" Referenced US Application Serial No. 12 / 834,547 (Attorney Docket P070075). technical field [0003] The present invention relates generally to metalworking, and more particularly to metal joining. Background technique [0004] In some metal joint applications, a sheet metal flange is secured to a port located in a panel or bulkhead. In some of these applications, the flange is formed from two halves, such as clamshells, which have been formed separately and then joined. One flange half typic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D39/00
CPCB21D41/026B21D39/032B21D19/08B21D39/02
Inventor D·N·泽莫R·D·史密斯R·W·维里兰德
Owner LENNOX IND