WO2012102960A1 - Balle de détente destinée à un tube pour échangeur de chaleur - Google Patents

Balle de détente destinée à un tube pour échangeur de chaleur Download PDF

Info

Publication number
WO2012102960A1
WO2012102960A1 PCT/US2012/022012 US2012022012W WO2012102960A1 WO 2012102960 A1 WO2012102960 A1 WO 2012102960A1 US 2012022012 W US2012022012 W US 2012022012W WO 2012102960 A1 WO2012102960 A1 WO 2012102960A1
Authority
WO
WIPO (PCT)
Prior art keywords
bullet
expansion
edge face
tube
leading edge
Prior art date
Application number
PCT/US2012/022012
Other languages
English (en)
Inventor
Eric Konkle
James H. WOODARD
Jason Michael Thomas
Loren D. Hoffman
Jeffrey L. Jones
Luis Felipe Avila
Original Assignee
Carrier Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Carrier Corporation filed Critical Carrier Corporation
Priority to US13/981,114 priority Critical patent/US20130298632A1/en
Publication of WO2012102960A1 publication Critical patent/WO2012102960A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D41/00—Application of procedures in order to alter the diameter of tube ends
    • B21D41/02—Enlarging
    • B21D41/026—Enlarging by means of mandrels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/08—Tube expanders
    • B21D39/20—Tube expanders with mandrels, e.g. expandable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
    • B21D53/08—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of both metal tubes and sheet metal
    • B21D53/085—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of both metal tubes and sheet metal with fins places on zig-zag tubes or parallel tubes

Definitions

  • the subject matter disclosed herein relates to heat exchanger tubes. More specifically, the subject disclosure relates to expansion bullets for manufacturing heat exchanger tubes.
  • Heat exchangers of, for example, air conditioners include a plurality of heat exchanger fins and a plurality of heat exchanger tubes.
  • the tubes are passed through holes in the fins, then are expanded to force the tubes into interference fit with the fins, thereby securing the tubes in place relative to the fins.
  • the tubes are expanded via a bullet having a maximum diameter the same as that of the desired final inner diameter of the tube.
  • the bullet 100 is fixed to a mandrel for inserting into the tube, and typically has a radiused leading edge 102 and a conical or cylindrical body 104.
  • the typical cross-sectional shape of an expansion bullet requires application of a high force in order for the bullet to successfully expand the tube. Further, especially when expanding aluminum tubes, aluminum material builds up on the bullet, resulting in galling and further increase in the necessary applied force.
  • an expansion bullet for a heat exchanger tube includes a leading edge face, a trailing edge face, and a bullet body insertable into a tube of a heat exchanger to expand the tube.
  • the bullet body extends from the leading edge face to the trailing edge face and has an outer profile defined by a single radius.
  • an expansion mechanism for a tube of heat exchanger includes a bullet driving device and an expansion bullet driveable by the bullet driving device.
  • the expansion bullet includes a leading edge face, a trailing edge face, and a bullet body insertable into a tube of a heat exchanger to expand the tube.
  • the bullet body extends from the leading edge face to the trailing edge face and has an outer profile defined by a single radius.
  • Figure 1 is a cross-sectional view of an embodiment of a tube expansion bullet
  • Figure 2 is another cross-sectional view of an embodiment of an expansion bullet.
  • Figure 3 is a cross-sectional view of a typical expansion bullet.
  • FIG. 1 Shown in FIG. 1 is a schematic of an expansion mechanism 10 for a tube 12 of, for example, a heat exchanger.
  • the illustrated tube 12 is formed of an aluminum material, but other materials, for example, copper, may be utilized.
  • the mechanism 10 includes a mandrel 14 which supports an expansion bullet 16.
  • the expansion bullet 16 has a maximum diameter 18 greater than an unexpanded diameter 20 of the tube 12.
  • the mandrel 14 and bullet 16 are driven into the tube 12 to expand the tube 12 to an inner diameter substantially equal to the maximum diameter 18 of the bullet 16.
  • expansion utilizing a mandrel 14 to drive the bullet 16 is shown in FIG. 1 and described herein, it is merely exemplary. It is to be appreciated that other bullet 16 driving means, such as a fluid applied to the bullet 16, are contemplated within the present scope.
  • the bullet 16 has a specific cross-sectional shape, as shown in FIG. 2.
  • the bullet 16 is substantially symmetrical about a bullet axis 22 extending along a length 24 of the bullet 16.
  • the bullet 16 has an inner diameter 26 defining a bullet opening 28 for mounting the bullet on the mandrel 14.
  • the bullet has a leading edge face 30 and a trailing edge face 32 which are substantially planar and perpendicular to the bullet axis 22, and a bullet body 34 extending the length of the bullet 16 between the leading edge face 30 and the trailing edge face 32.
  • a surface profile of the bullet body 34 is a single continuous radius 36. While a single continuous radius is shown in FIG. 2, it is to be appreciated that other configurations to reduce friction may be utilized.
  • the radius 36 may be interrupted along its length by on or more chamfers or steps.
  • a center point 38 of the continuous radius 36 is shown in FIG. 2.
  • an axial position of the center point 38 is biased toward the trailing edge face 32 such that, a leading edge face diameter 40 is less than a trailing edge face diameter 42.
  • the center point 38 is located along the length of the bullet 16 between about 1 ⁇ 4 and 1/3 of the distance from the trailing edge face 32 to the leading edge face 30. Further, in some embodiments, the center point 38 is offset radially from the bullet axis 22. For example, as shown in FIG. 2, the center point 38 may be located outside of the bullet 16.
  • a bullet 16 utilized to expand a tube 12 having about a 3/8" outer diameter 44 is shown in FIG. 2.
  • the leading edge face diameter 40 is about 0.188 inches and the trailing edge diameter 42 is about 0.321 inches.
  • the continuous radius 36 of the bullet 16 is about .350 inches.
  • the continuous radius 36 is substantially proportional to the outer diameter 44 (shown in FIG. 1) of the tube 12 to be expanded. For larger outer diameters 44 a larger radius 36 is utilized, while for a smaller outer diameter 44, a bullet 16 having a smaller radius 36 is utilized.
  • the bullet opening 28 is chamfered at the leading edge face 30 and the trailing edge face 32 to ease installation of the bullet 16 on the mandrel 14.
  • the bullet 16 is formed from a steel material, for example, tool steel. It is to be appreciated, however, that other suitable materials may be utilized and are contemplated within the present scope.
  • the bullet 16 may include a coating material applied to the bullet 16. This coating may be, for example, a metallic coating, a plastic coating, a nano coating, and/or a surface treatment, or the like to reduce friction and galling, add wear resistance, and/or increase corrosion resistance.
  • the coating is a hard chrome plating.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

La présente invention a trait à une balle de détente destinée à un tube pour échangeur de chaleur, laquelle balle de détente inclut une face de bord d'attaque, une face de bord de fuite et un corps de balle qui peut être inséré dans le tube d'un échangeur de chaleur de manière à dilater le tube. Le corps de balle s'étend de la face de bord d'attaque jusqu'à la face de bord de fuite et est doté d'un profil extérieur qui est défini par un simple rayon. Un mécanisme de dilatation destiné au tube d'un échangeur de chaleur inclut un dispositif de commande de balle et une balle de détente pouvant être commandée par le dispositif de commande de balle. La balle de détente inclut une face de bord d'attaque, une face de bord de fuite et un corps de balle qui peut être inséré dans le tube d'un échangeur de chaleur de manière à dilater le tube. Le corps de balle s'étend de la face de bord d'attaque jusqu'à la face de bord de fuite et est doté d'un profil extérieur qui est défini par un simple rayon.
PCT/US2012/022012 2011-01-24 2012-01-20 Balle de détente destinée à un tube pour échangeur de chaleur WO2012102960A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US13/981,114 US20130298632A1 (en) 2011-01-24 2012-01-20 Expansion bullet for heat exchanger tube

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201161435641P 2011-01-24 2011-01-24
US61/435,641 2011-01-24

Publications (1)

Publication Number Publication Date
WO2012102960A1 true WO2012102960A1 (fr) 2012-08-02

Family

ID=45554898

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2012/022012 WO2012102960A1 (fr) 2011-01-24 2012-01-20 Balle de détente destinée à un tube pour échangeur de chaleur

Country Status (2)

Country Link
US (1) US20130298632A1 (fr)
WO (1) WO2012102960A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6238063B2 (ja) * 2013-12-27 2017-11-29 三菱アルミニウム株式会社 拡管プラグ

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02182330A (ja) * 1989-01-10 1990-07-17 Mitsubishi Metal Corp セラミックス製拡管用プラグ
JP2005288502A (ja) * 2004-03-31 2005-10-20 Kobelco & Materials Copper Tube Inc 拡管用工具およびそれを使用した拡管方法
JP2006130558A (ja) * 2004-10-04 2006-05-25 Furukawa Electric Co Ltd:The 熱交換器の製造方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2282301A1 (fr) * 1974-08-22 1976-03-19 Mannesmann Roehren Werke Ag Bouchons de securite en plusieurs parties pour laminoir
GB2128522B (en) * 1982-09-29 1986-02-26 Carrier Corp A tube expanding and grooving tool and method
JPH02224806A (ja) * 1989-02-28 1990-09-06 Nkk Corp 継目無し鋼管製造用プラグ
JP4738401B2 (ja) * 2007-11-28 2011-08-03 三菱電機株式会社 空気調和機

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02182330A (ja) * 1989-01-10 1990-07-17 Mitsubishi Metal Corp セラミックス製拡管用プラグ
JP2005288502A (ja) * 2004-03-31 2005-10-20 Kobelco & Materials Copper Tube Inc 拡管用工具およびそれを使用した拡管方法
JP2006130558A (ja) * 2004-10-04 2006-05-25 Furukawa Electric Co Ltd:The 熱交換器の製造方法

Also Published As

Publication number Publication date
US20130298632A1 (en) 2013-11-14

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