US3768291A - Method of forming spiral ridges on the inside diameter of externally finned tube - Google Patents

Method of forming spiral ridges on the inside diameter of externally finned tube Download PDF

Info

Publication number
US3768291A
US3768291A US00224095A US3768291DA US3768291A US 3768291 A US3768291 A US 3768291A US 00224095 A US00224095 A US 00224095A US 3768291D A US3768291D A US 3768291DA US 3768291 A US3768291 A US 3768291A
Authority
US
United States
Prior art keywords
tube
tube support
support structure
tools
mandrel
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
US00224095A
Other languages
English (en)
Inventor
K Rieger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bank of Nova Scotia
Wolverine Tube Inc
Original Assignee
UOP LLC
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 UOP LLC filed Critical UOP LLC
Application granted granted Critical
Publication of US3768291A publication Critical patent/US3768291A/en
Assigned to WOLVERINE TUBE, INC., A DE. CORP. reassignment WOLVERINE TUBE, INC., A DE. CORP. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: UOP INC.,
Assigned to BANK OF NOVA SCOTIA, THE reassignment BANK OF NOVA SCOTIA, THE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: WOLVERINE ACQUISITION CORP. A CORP. OF DE
Assigned to WOLVERINE ACQUISITION CORP., A DE CORP reassignment WOLVERINE ACQUISITION CORP., A DE CORP ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: WOLVERINE TUBE, INC.,
Assigned to WOLVERINE TUBE, INC., A CORP. OF AL reassignment WOLVERINE TUBE, INC., A CORP. OF AL CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: WOLVERINE ACQUISITION CORP.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/20—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes or tubes with decorated walls
    • B21C37/207—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes or tubes with decorated walls with helical guides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/42—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being both outside and inside the tubular element
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/42—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being both outside and inside the tubular element
    • F28F1/422—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being both outside and inside the tubular element with outside means integral with the tubular element and inside means integral with the tubular element

Definitions

  • the internal support structure which has.
  • the additional function of forming the internal helical ridges must be formed of a plurality of relatively rotatable members.
  • the internal pins which may in fact be sleeves supported for rotation on a mandrel, may be positioned to cooperate with a selected one or more of the groups of discs.
  • FIG. 1 is an enlarged elevational view, partly in section of an internally ribbed externally finned tube of the present invention.
  • FIG. 2 is an elevational view showing the apparatus.
  • FIG. 3 is a greatly enlarged fragmentary sectional view showing the engagement between tube, discs, and mandrel pins.
  • FIG. 4 is an enlarged elevational view at the dotted circle 4 of FIG. 2.
  • FIG. 5 is a view similar to FIG. 4, showing a modified construction.
  • FIG. 6 is a view similar to FIG. 2 showing a different embodiment of the invention.
  • FIG. 7 is an enlarged sectional view on line 7-7, FIG. 3.
  • the present invention relates to the production of an externally finned tube 10, as seen in FIG. 1, in which helical external fins 12 are provided, and in which the interior of the tube is provided with helicaLridge convolutions 14.
  • the internal ridges may extend at substantially any required helix angle and may be single or multiple start as necessary to provide the desired fluid flow conditions in the tube.
  • the formation of the internal ridge convolutions is produced by the action of fin-forming roll assemblies, one of which is indicated generally at 16 in FIG. 2. Usually, three such rolls are provided, spaced uniformly.
  • the rolls comprise, as illustrated herein, axially separated groups 18, 20 and 22 of discs, the individual discs being indicated at 24.
  • the discs of each group are of the same thickness, and are assembled in tightly abutting relation on an arbor 26. Due to tube elongation during rolling, the discs of successively acting groups 20 and 22 are of slightly increased thickness.
  • the groups 18, 20 and 22 are separated by spacers 28 and 30 and are clampled between washers 32 and flanges 34 on arbor 26 by nut 36.
  • the rolls 16 may revolve about the axis of tube 18, while rotating on their own axes, or the tube may rotate.
  • the successively acting groups of discs, and the discs of each group are generally of increasing diameter and may be of like shapes or progressively changing shape so as to force the metal of the tube up into the helical fins 12 as seen in FIG. 1.
  • the support structure at the interior of the tube comprises a mandrel 40 which is held against longitudinal travel and may either rotate about its axis or be restrained against rotation.
  • the mandrel has a reduced cylindrical end portion 42 on which are rotatably received hollow pins or sleeves, the first sleeve 44 having a smooth exterior surface, and the second sleeve 46 having one or more helical grooves 48.
  • the sleeves are retained on the reduced portion of the mandrel by nut 50 threaded to the end of the mandrel.
  • the inner surface of the tube beneath the groups 18 of discs is pressed into engagement with the smooth cylindrical surface, as indicated at 52.
  • the formation of fins by the action of the discs not only causes relative rotation between the but also and tube also causes positive axial advance of the tube. Accordingly, where the tube engages the smooth outer surface of the first sleeves 44, in the zone indicated at 52 in FIG. 3, the tube slides longitudinally to the right as seen in this Figure. If the tube is rotating about its axis at this zone, then sleeve 44 will rotate on mandrel rod 40, or the mandrel itself will rotate.
  • the action of the first group 18 of discs is to form the incipient fins 54 without starting the formation of internal ridges which would be shaved off due to the elongation of tube between disc groups 18 and 20. Due to springback or resilience of the tube, clearance will exist between the interior surface of the tube and the sleeves 44, 46 as indicated at 56. However, the action of the second group 20 of discs will again press the tube into contact with the adjacent sleeve, which in this case is the sleeve 46, the zone of contact being seen in FIG. 3 at 58.
  • the action of the several groups 20 of discs is to further penetrate the tube material and reduce the width of the partially formed fins as indicated at 60.
  • the pressure exerted by the groups 20 is sufficient to displace metal into the helical groove or grooves 48, as clearly seen at 62. Since the tube is continuously advanced axially by reason of the engagement between the inclined discs and the helical fins, and since the sleeves, including the. helically grooved sleeve 46, is restrained against axial movement, the tube slides axially over the sleeve 46. However, since metal is displaced by the disc group 20. into the helical grooves 48, this relative axial movement must be accompanied by a relative rotation as determined by the sliding of the incipient ridge 62 along the helix of the groove 48.
  • the relative sliding be- A tween the tube and cylindrical sleeve 44 will be limited to an axial direction, the sleeve 44 rotating with the tube.
  • the relative sliding between the tube and the grooved sleeve 46 will be limited by engagement between helical grooves 48 and ridges 62 to a helical direction. Therefore, relative rotation is required between sleeves 44 and 46.
  • grooves 48 in cross-section transverse to the groove, as seen in FIG. 7, may vary for different materials, different helix angles, and different desired operations with particular fluids flowing through the tube.
  • the grooves are relatively wide and shallow, having an obtuse included angle between the sides, preferably between 90 and 120.
  • the sides of the groove, as seen in FIG. 7 are composed of straight line elements interconnected at the bottom of the groove by a small fillet.
  • the sides 72,74 of the grooves 48 may be equally inclined as seen in FIG. 7.
  • the side of the groove facing the direction from which the tube moves (the side 72 in FIG. 7) will have a greater inclination than the opposite side.
  • the steeper angled side 72 may be inclined at an angle of 50 while the other side is inclined at an angle of 30 to the tangent plane 75. This provides a more effective thrust tending to rotate the sleeve 44.
  • FIG. 4 there is an enlarged elevation showing the adjacent ends of sleeves 44 and 36. It will be noted that the end of sleeve 44 is beveled at 76 and the adjacent end of grooved sleeve 46 is similarly beveled as seen at 78.
  • FIG. 5 there is shown an alternate construction in which the end of the smooth sleeve, here designated 44a is flat except for a rounded end corner 79 which has an extremely small radius in cross-section, as for example about 0.005 inch.
  • the end of the grooved sleeve,'here designated 46a is chamfered as seen at 80, at an angle of about 30 as shown.
  • FIG. 6 there is shown an arrangement in which the plain sleeve 82 extends to underlie both disc groups 18 and 20, while the grooved sleeve 84 is relatively short and underlies only the final forming disc group 22. Since sleeve 82 is smooth, the relative sliding movement between it and the tube is axial, while that between the grooved sleeve 84 and the tube is helical. Accordingly, there is relative rotation between sleeves 82 and 84, which is provided for by mounting them on the reduced portion 86 of the mandrel.
  • the forces tending to produce elongation of the tube may be opposed by the discs and sleeve grooves, so that actual elongation for the most part takes place only after the tube passes beyond the last disc of each group and the grooved sleeve.
  • the inclination of the grooves 48 may be gradually varied to accommodate tube elongation, the lead of the groove being increased or its helix angle decreased for this purpose.
  • smooth sleeve 44 or 82 is shown as rotatable on a mandrel 40, it will be understood that where the mandrel is freely rotatable, it may include an enlarged pin portion integral therewith which will perform the function of plain sleeve 44 or 82, and that only the grooved sleeve 46 or 84 may be rotatably mounted thereon. It will also be understood that plain sleeves 44 or 82 may be of slightly larger diameter to permit additional metal forming (sinking) to provide sufficient material for the internal ridges. v
  • the apparatus herein permits the formation of multiple start short pitch ridges internally of the tube.
  • a grooved sleeve producing a ridge fonnation of six ridges has a pitch (axial spacing between adjacent groove convolutions) of 0.387 inch and an outside diameter of 0.690 inch.
  • the present apparatus permits the production of internal ridges which extend at a greater helix angle than has heretofore been feasible, this meaning the angle measured between the axis of the tube and a line tangent to the helix curve. Moreover, it permits the production of tubing having multiple start ridges. By way of example ridges of satisfactory cross-sectional dimensions have been produced in tubing having an internal diameter of about 0.785 inch, with a helix angle in excess of 45, and with a six-start pattern of helical ridges. In general, the apparatus makes production of multiple start ridges with helix angles in excess of 30 entirely satisfactory.
  • the sleeves are formed of a hard wearresistant material such as tungsten carbide.
  • Apparatus for simultaneously forming external helical fins and internal helical ridges which comprises means for supporting a tube for axial advance including internal tube support structure having a first part provided with a smooth cylindrical exterior surface and a second part provided with a helically grooved exterior surface, means for retaining said tube support structure at a fixed rolling zone longitudinally of the tube through which the tube advances, a plurality of circumferentially spaced fin rolling tools at said zone, each of said tools comprising a plurality of axially spaced groups of fin rolling discs, means supporting said tools for rotation with their axes crossed in space with respect to the tube axis, means supporting said first part of the tube support structure within the tube in registration with a first one of said groups of discs of said tools and supporting said second part of the tube support structure within the tube in registration with a second one of said group of discs of said tools positioned to act on the tube subsequent to the action thereon of said first one group of discs, means for effecting relative motion between said tools and tube equivalent to re
  • said first part of said tube support structure comprises a sleeve having a smooth cylindrical surface rotatably supported on said mandrel for rotation independent of said second part of said tube support structure.
  • Apparatus for simultaneously forming external helical fins and internal helical ridges on a tube comprising a plurality of fin forming tools positioned circumferentially around a tube at a rolling zone, a tube support member within the tube at said rolling zone, means supporting said tube support member at said zone against axial movement and for rotation relative to the tube, said tube support member having helical grooves in its exterior surface into which said tools press material of the tube incident to the pressure applied to the tube in the fin forming operation, said grooves in normal cross-section having side walls which are essentially straight throughout their major width, the included angle between the side walls of said grooves being obtuse.
  • the tube support member is formed of a hard, wear-resistant material such as tungsten carbide.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Geometry (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
US00224095A 1972-02-07 1972-02-07 Method of forming spiral ridges on the inside diameter of externally finned tube Expired - Lifetime US3768291A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US22409572A 1972-02-07 1972-02-07

Publications (1)

Publication Number Publication Date
US3768291A true US3768291A (en) 1973-10-30

Family

ID=22839259

Family Applications (1)

Application Number Title Priority Date Filing Date
US00224095A Expired - Lifetime US3768291A (en) 1972-02-07 1972-02-07 Method of forming spiral ridges on the inside diameter of externally finned tube

Country Status (16)

Country Link
US (1) US3768291A (en, 2012)
JP (1) JPS5211670B2 (en, 2012)
AR (1) AR197801A1 (en, 2012)
AT (1) AT325388B (en, 2012)
BR (1) BR7300743D0 (en, 2012)
CA (1) CA994089A (en, 2012)
CH (1) CH564383A5 (en, 2012)
DE (1) DE2303172C3 (en, 2012)
EG (1) EG10817A (en, 2012)
ES (1) ES410790A1 (en, 2012)
FR (1) FR2171097B1 (en, 2012)
GB (1) GB1412671A (en, 2012)
IL (1) IL41229A (en, 2012)
IT (1) IT976884B (en, 2012)
SE (1) SE399188B (en, 2012)
ZA (1) ZA7387B (en, 2012)

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3881342A (en) * 1972-07-14 1975-05-06 Universal Oil Prod Co Method of making integral finned tube for submerged boiling applications having special o.d. and/or i.d. enhancement
US4059147A (en) * 1972-07-14 1977-11-22 Universal Oil Products Company Integral finned tube for submerged boiling applications having special O.D. and/or I.D. enhancement
US4060125A (en) * 1974-10-21 1977-11-29 Hitachi Cable, Ltd. Heat transfer wall for boiling liquids
US4118964A (en) * 1977-05-18 1978-10-10 General Electric Company Lubricated mandrel for a finning machine
US4161214A (en) * 1976-11-09 1979-07-17 James L. Lowe Laundry hot water supply coil assembly
US4270690A (en) * 1979-09-10 1981-06-02 Combustion Engineering, Inc. Method of forming variably rifled tubes
US4330036A (en) * 1980-08-21 1982-05-18 Kobe Steel, Ltd. Construction of a heat transfer wall and heat transfer pipe and method of producing heat transfer pipe
US4336702A (en) * 1980-09-12 1982-06-29 Amado Jr Juan J Method of and apparatus for making spiral tubes
US4343350A (en) * 1978-08-04 1982-08-10 Uop Inc. Double wall tubing assembly and method of making same
EP0048021A3 (en) * 1980-09-15 1982-08-25 Noranda Mines Limited Heat transfer device having an augmented wall surface
US4366859A (en) * 1975-04-02 1983-01-04 Keyes John M Refractory heat exchange tube
US4425696A (en) 1981-07-02 1984-01-17 Carrier Corporation Method of manufacturing a high performance heat transfer tube
US4428106A (en) 1978-08-04 1984-01-31 Uop Inc. Method of making double wall tubing assembly
US4438807A (en) * 1981-07-02 1984-03-27 Carrier Corporation High performance heat transfer tube
US4584861A (en) * 1984-07-03 1986-04-29 Battelle Development Corporation Knurling tool
EP0165583A3 (en) * 1984-06-20 1986-10-22 Hitachi, Ltd. Heat transfer tube for single phase flow
US4660630A (en) * 1985-06-12 1987-04-28 Wolverine Tube, Inc. Heat transfer tube having internal ridges, and method of making same
US4915166A (en) * 1983-08-04 1990-04-10 Wolverine Tube, Inc. Titanium heat exchange tubes
US5010643A (en) * 1988-09-15 1991-04-30 Carrier Corporation High performance heat transfer tube for heat exchanger
WO1996020050A1 (de) * 1994-12-28 1996-07-04 Dynamit Nobel Gmbh Explosivstoff-Und Systemtechnik Verfahren zur herstellung von innenverzahnten teilen
US6067712A (en) * 1993-12-15 2000-05-30 Olin Corporation Heat exchange tube with embossed enhancement
US20030094272A1 (en) * 2001-11-16 2003-05-22 Karine Brand Heat-exchanger tube structured on both sides and a method for its manufacture
US20030226250A1 (en) * 2002-04-22 2003-12-11 Gerald Hauf Method of producing sliding sleeves for gearshift mechanisms
US20040250587A1 (en) * 2000-09-21 2004-12-16 Packless Metal Hose, Inc. Apparatus and methods for forming internally and externally textured tubing
WO2005068927A1 (en) * 2004-01-07 2005-07-28 Dow Global Technologies Inc. Method of manufacturing heat transfer tube
US20050229667A1 (en) * 2004-04-15 2005-10-20 Jesson John E Apparatus and method for forming internally ribbed or rifled tubes
EP1208343A4 (en) * 1999-09-03 2006-01-18 Sunpower Inc THERMAL EXCHANGER AND METHOD OF CONSTRUCTION
US20080250838A1 (en) * 2005-06-15 2008-10-16 Torsten Flugge Method and device for producing metal rings
US8162040B2 (en) 2006-03-10 2012-04-24 Spinworks, LLC Heat exchanging insert and method for fabricating same
RU2463124C2 (ru) * 2010-12-22 2012-10-10 Открытое акционерное общество "Электростальский завод тяжелого машиностроения" Способ изготовления трубных изделий с наружными и внутренними утолщениями
CN103317047A (zh) * 2013-07-02 2013-09-25 山东美陵化工设备股份有限公司 锥形翅片冷凝管的轧制装置和轧制方法
WO2024037733A1 (en) * 2022-08-16 2024-02-22 Baker Hughes Energy Technology UK Limited Supporting shaft

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2124948B (en) * 1982-07-31 1986-01-02 Formflo Ltd Ring rolling
DE3333159A1 (de) * 1983-09-14 1985-03-28 Kabel- und Metallwerke Gutehoffnungshütte AG, 3000 Hannover Metallisches hohlprofil mit vergroesserter oberflaeche sowie verfahren zu seiner herstellung und verwendung
DE4307775A1 (de) * 1993-03-12 1994-09-15 Dynamit Nobel Ag Verfahren und Vorrichtung zur Herstellung von hochfesten Rohren
DE19963353B4 (de) 1999-12-28 2004-05-27 Wieland-Werke Ag Beidseitig strukturiertes Wärmeaustauscherrohr und Verfahren zu dessen Herstellung
FR2836649B1 (fr) * 2002-03-01 2006-05-26 Inst Francais Du Petrole Outil compose de plaques empilees pour imprimer des rainures sur un materiau deformable
DE10311144B3 (de) * 2003-03-14 2004-10-28 Sms Meer Gmbh Verfahren zum Herstellen eines Rohres mit einer Innenprofilierung und Vorrichtung zur Durchführung des Verfahrens
MXPA06013048A (es) * 2004-05-13 2006-12-20 Wolverine Tube Inc Herramienta retractil de aleteadura y metodo de uso.
DE102012010521A1 (de) * 2012-05-25 2013-11-28 GM Global Technology Operations LLC (n. d. Gesetzen des Staates Delaware) Wärmetauscher für eine Kraftfahrzeug-Klimaanlage

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1465073A (en) * 1919-10-30 1923-08-14 Leonard D Davis Process of producing seamless internally-ribbed tubes
AT232829B (de) * 1961-03-30 1964-04-10 Schmoele Metall R & G Verfahren und Vorrichtung zur Herstellung von für Wärmeaustauscher bzw. Kondensatoren usw. bestimmten Metall- bzw. Stahlrippenrohren
US3292408A (en) * 1964-06-22 1966-12-20 Babcock & Wilcox Co Method of forming internally ribbed tubes
US3580026A (en) * 1968-12-17 1971-05-25 Inst De Cercetari Tehnologic P Method and apparatus for manufacturing finned pipes

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3187537A (en) * 1961-12-11 1965-06-08 Calumet & Hecla Floating rotation mandrel for finning
CH485189A (fr) * 1968-12-18 1970-01-31 Inst Cercetari Tehnologice Pen Procédé de fabrication de tubes ovales ou elliptiques à ailettes et outillage pour la mise en oeuvre du procédé

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1465073A (en) * 1919-10-30 1923-08-14 Leonard D Davis Process of producing seamless internally-ribbed tubes
AT232829B (de) * 1961-03-30 1964-04-10 Schmoele Metall R & G Verfahren und Vorrichtung zur Herstellung von für Wärmeaustauscher bzw. Kondensatoren usw. bestimmten Metall- bzw. Stahlrippenrohren
US3292408A (en) * 1964-06-22 1966-12-20 Babcock & Wilcox Co Method of forming internally ribbed tubes
US3580026A (en) * 1968-12-17 1971-05-25 Inst De Cercetari Tehnologic P Method and apparatus for manufacturing finned pipes

Cited By (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4059147A (en) * 1972-07-14 1977-11-22 Universal Oil Products Company Integral finned tube for submerged boiling applications having special O.D. and/or I.D. enhancement
US3881342A (en) * 1972-07-14 1975-05-06 Universal Oil Prod Co Method of making integral finned tube for submerged boiling applications having special o.d. and/or i.d. enhancement
US4060125A (en) * 1974-10-21 1977-11-29 Hitachi Cable, Ltd. Heat transfer wall for boiling liquids
US4366859A (en) * 1975-04-02 1983-01-04 Keyes John M Refractory heat exchange tube
US4161214A (en) * 1976-11-09 1979-07-17 James L. Lowe Laundry hot water supply coil assembly
US4118964A (en) * 1977-05-18 1978-10-10 General Electric Company Lubricated mandrel for a finning machine
US4428106A (en) 1978-08-04 1984-01-31 Uop Inc. Method of making double wall tubing assembly
US4343350A (en) * 1978-08-04 1982-08-10 Uop Inc. Double wall tubing assembly and method of making same
US4270690A (en) * 1979-09-10 1981-06-02 Combustion Engineering, Inc. Method of forming variably rifled tubes
US4330036A (en) * 1980-08-21 1982-05-18 Kobe Steel, Ltd. Construction of a heat transfer wall and heat transfer pipe and method of producing heat transfer pipe
US4336702A (en) * 1980-09-12 1982-06-29 Amado Jr Juan J Method of and apparatus for making spiral tubes
EP0048021A3 (en) * 1980-09-15 1982-08-25 Noranda Mines Limited Heat transfer device having an augmented wall surface
US4402359A (en) * 1980-09-15 1983-09-06 Noranda Mines Limited Heat transfer device having an augmented wall surface
US4425696A (en) 1981-07-02 1984-01-17 Carrier Corporation Method of manufacturing a high performance heat transfer tube
US4438807A (en) * 1981-07-02 1984-03-27 Carrier Corporation High performance heat transfer tube
US4915166A (en) * 1983-08-04 1990-04-10 Wolverine Tube, Inc. Titanium heat exchange tubes
EP0165583A3 (en) * 1984-06-20 1986-10-22 Hitachi, Ltd. Heat transfer tube for single phase flow
US4584861A (en) * 1984-07-03 1986-04-29 Battelle Development Corporation Knurling tool
US4660630A (en) * 1985-06-12 1987-04-28 Wolverine Tube, Inc. Heat transfer tube having internal ridges, and method of making same
US5010643A (en) * 1988-09-15 1991-04-30 Carrier Corporation High performance heat transfer tube for heat exchanger
US6067712A (en) * 1993-12-15 2000-05-30 Olin Corporation Heat exchange tube with embossed enhancement
WO1996020050A1 (de) * 1994-12-28 1996-07-04 Dynamit Nobel Gmbh Explosivstoff-Und Systemtechnik Verfahren zur herstellung von innenverzahnten teilen
EP1208343A4 (en) * 1999-09-03 2006-01-18 Sunpower Inc THERMAL EXCHANGER AND METHOD OF CONSTRUCTION
US6968719B2 (en) * 2000-09-21 2005-11-29 Packless Metal Hose, Inc. Apparatus and methods for forming internally and externally textured tubing
US20040250587A1 (en) * 2000-09-21 2004-12-16 Packless Metal Hose, Inc. Apparatus and methods for forming internally and externally textured tubing
US20030094272A1 (en) * 2001-11-16 2003-05-22 Karine Brand Heat-exchanger tube structured on both sides and a method for its manufacture
EP1312885A3 (de) * 2001-11-16 2004-08-18 Wieland-Werke AG Beidseitig strukturiertes Wärmeaustauscherrohr und Verfahren zu dessen Herstellung
US6883358B2 (en) * 2002-04-22 2005-04-26 Hay-Tec Automotive Gmbh & Co. Kg Method of producing sliding sleeves for gearshift mechanisms
US20030226250A1 (en) * 2002-04-22 2003-12-11 Gerald Hauf Method of producing sliding sleeves for gearshift mechanisms
WO2005068927A1 (en) * 2004-01-07 2005-07-28 Dow Global Technologies Inc. Method of manufacturing heat transfer tube
US20050229667A1 (en) * 2004-04-15 2005-10-20 Jesson John E Apparatus and method for forming internally ribbed or rifled tubes
US7021106B2 (en) 2004-04-15 2006-04-04 Mitsui Babcock (Us) Llc Apparatus and method for forming internally ribbed or rifled tubes
US20080250838A1 (en) * 2005-06-15 2008-10-16 Torsten Flugge Method and device for producing metal rings
US8162040B2 (en) 2006-03-10 2012-04-24 Spinworks, LLC Heat exchanging insert and method for fabricating same
RU2463124C2 (ru) * 2010-12-22 2012-10-10 Открытое акционерное общество "Электростальский завод тяжелого машиностроения" Способ изготовления трубных изделий с наружными и внутренними утолщениями
CN103317047A (zh) * 2013-07-02 2013-09-25 山东美陵化工设备股份有限公司 锥形翅片冷凝管的轧制装置和轧制方法
CN103317047B (zh) * 2013-07-02 2014-12-03 山东美陵化工设备股份有限公司 锥形翅片冷凝管的轧制方法
WO2024037733A1 (en) * 2022-08-16 2024-02-22 Baker Hughes Energy Technology UK Limited Supporting shaft

Also Published As

Publication number Publication date
BR7300743D0 (pt) 1973-12-13
FR2171097A1 (en, 2012) 1973-09-21
ZA7387B (en) 1973-10-31
IT976884B (it) 1974-09-10
ES410790A1 (es) 1976-06-16
JPS4889160A (en, 2012) 1973-11-21
IL41229A0 (en) 1973-03-30
CH564383A5 (en, 2012) 1975-07-31
AU5143573A (en) 1974-07-25
IL41229A (en) 1977-01-31
DE2303172B2 (de) 1975-01-30
FR2171097B1 (en, 2012) 1975-10-31
CA994089A (en) 1976-08-03
SE399188B (sv) 1978-02-06
JPS5211670B2 (en, 2012) 1977-04-01
AT325388B (de) 1975-10-27
EG10817A (en) 1976-10-31
DE2303172A1 (de) 1973-08-09
GB1412671A (en) 1975-11-05
AR197801A1 (es) 1974-05-10
DE2303172C3 (de) 1975-09-11

Similar Documents

Publication Publication Date Title
US3768291A (en) Method of forming spiral ridges on the inside diameter of externally finned tube
EP1113237B1 (de) Beidseitig strukturiertes Wärmeaustauscherrohr und Verfahren zu dessen Herstellung
EP1312885B1 (de) Beidseitig strukturiertes Wärmeaustauscherrohr und Verfahren zu dessen Herstellung
EP0687880B1 (de) Mehrgängiges Rippenrohr und Verfahren zu dessen Herstellung
US4031602A (en) Method of making heat transfer tube
US4796693A (en) Finned tube with indented groove base and method of forming same
US2463997A (en) Method of making integral external and internal finned tubing
AU606956B2 (en) Cold drawing technique and apparatus for forming internally grooved tubes
US3795125A (en) High-fin integral finned tube of heat-resisting alloys, and multi-pass process for making the same
US3214995A (en) Push-pull cable with plastic lined casing
US3383893A (en) Apparatus for producing integral finned tubing of fine pitch
US4514997A (en) Tube corrugating die
US4084303A (en) Forming roll for rolling cylindrical bodies from cylindrical rod stock, and a method of making the same
US5709029A (en) Manufacture of helically corrugated conduit
US3600922A (en) Manufacture of integrally finned tubing
US2862215A (en) Machine for forming threads within a metallic tube by swaging
US2868046A (en) Apparatus for manufacturing integral finned tubing
US2562785A (en) Integral finned tube
US2150815A (en) Screw-threaded stock and manufacture of same
US1982369A (en) Method and machine for making corrugated tubes
US3256727A (en) Method and apparatus for producing deformed steel bars
US4353233A (en) Dies for making thread-forming fasteners
US4435968A (en) Apparatus for corrugating pipes
US3118328A (en) Apparatus for producing longitudinal
US3451242A (en) Apparatus for deforming tubing

Legal Events

Date Code Title Description
STCF Information on status: patent grant

Free format text: PATENTED FILE - (OLD CASE ADDED FOR FILE TRACKING PURPOSES)

AS Assignment

Owner name: WOLVERINE TUBE, INC., A DE. CORP.,ALABAMA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:UOP INC.,;REEL/FRAME:004657/0711

Effective date: 19861027

Owner name: WOLVERINE TUBE, INC., 2100 MARKET STREET, N.E., DE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:UOP INC.,;REEL/FRAME:004657/0711

Effective date: 19861027

AS Assignment

Owner name: BANK OF NOVA SCOTIA, THE, 44 KING STREET, WEST, TO

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:WOLVERINE ACQUISITION CORP. A CORP. OF DE;REEL/FRAME:004696/0897

Effective date: 19870313

AS Assignment

Owner name: WOLVERINE ACQUISITION CORP., A DE CORP,DELAWARE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:WOLVERINE TUBE, INC.,;REEL/FRAME:004728/0083

Effective date: 19870318

Owner name: WOLVERINE ACQUISITION CORP., CORPORATION TRUST CEN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:WOLVERINE TUBE, INC.,;REEL/FRAME:004728/0083

Effective date: 19870318

AS Assignment

Owner name: WOLVERINE TUBE, INC., A CORP. OF AL,ALABAMA

Free format text: CHANGE OF NAME;ASSIGNOR:WOLVERINE ACQUISITION CORP.;REEL/FRAME:004827/0237

Effective date: 19870626

Owner name: WOLVERINE TUBE, INC., A CORP. OF AL

Free format text: CHANGE OF NAME;ASSIGNOR:WOLVERINE ACQUISITION CORP.;REEL/FRAME:004827/0237

Effective date: 19870626