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 PDFInfo
- 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
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes 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 and 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 and 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)
Abstract
Description
Claims (10)
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) |
JP (1) | JPS5211670B2 (en) |
AR (1) | AR197801A1 (en) |
AT (1) | AT325388B (en) |
BR (1) | BR7300743D0 (en) |
CA (1) | CA994089A (en) |
CH (1) | CH564383A5 (en) |
DE (1) | DE2303172C3 (en) |
EG (1) | EG10817A (en) |
ES (1) | ES410790A1 (en) |
FR (1) | FR2171097B1 (en) |
GB (1) | GB1412671A (en) |
IL (1) | IL41229A (en) |
IT (1) | IT976884B (en) |
SE (1) | SE399188B (en) |
ZA (1) | ZA7387B (en) |
Cited By (30)
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 |
EP0048021A2 (en) * | 1980-09-15 | 1982-03-24 | Noranda Inc. | Heat transfer device having an augmented wall surface |
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 |
US4366859A (en) * | 1975-04-02 | 1983-01-04 | Keyes John M | Refractory heat exchange tube |
US4438807A (en) * | 1981-07-02 | 1984-03-27 | Carrier Corporation | High performance heat transfer tube |
EP0165583A2 (en) * | 1984-06-20 | 1985-12-27 | 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 |
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 (en) * | 1994-12-28 | 1996-07-04 | Dynamit Nobel Gmbh Explosivstoff-Und Systemtechnik | Method of manufacturing internally geared parts |
US6067712A (en) * | 1993-12-15 | 2000-05-30 | Olin Corporation | Heat exchange tube with embossed enhancement |
EP1208343A1 (en) * | 1999-09-03 | 2002-05-29 | Sunpower, Inc. | Heat exchanger and method of constructing same |
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 |
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 (en) * | 2010-12-22 | 2012-10-10 | Открытое акционерное общество "Электростальский завод тяжелого машиностроения" | Method of making tubular articles with external and internal bulges |
CN103317047A (en) * | 2013-07-02 | 2013-09-25 | 山东美陵化工设备股份有限公司 | Device and method for rolling conical-fin condensing tubes |
WO2024037733A1 (en) * | 2022-08-16 | 2024-02-22 | Baker Hughes Energy Technology UK Limited | Supporting shaft |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2124948B (en) * | 1982-07-31 | 1986-01-02 | Formflo Ltd | Ring rolling |
DE3333159A1 (en) * | 1983-09-14 | 1985-03-28 | Kabel- und Metallwerke Gutehoffnungshütte AG, 3000 Hannover | Metallic hollow profile having an enlarged surface, and a method for its production and use |
DE4307775A1 (en) * | 1993-03-12 | 1994-09-15 | Dynamit Nobel Ag | Method and device for producing high-strength pipes |
DE19963353B4 (en) | 1999-12-28 | 2004-05-27 | Wieland-Werke Ag | Heat exchanger tube structured on both sides and method for its production |
FR2836649B1 (en) * | 2002-03-01 | 2006-05-26 | Inst Francais Du Petrole | TOOL COMPRISING STACKED PLATES FOR PRINTING GROOVES ON DEFORMABLE MATERIAL |
DE10311144B3 (en) * | 2003-03-14 | 2004-10-28 | Sms Meer Gmbh | Method for producing a tube with an internal profile and device for carrying out the method |
ATE473411T1 (en) * | 2004-05-13 | 2010-07-15 | Wolverine Tube Inc | RETRACTABLE TOOL FOR PULLING RIBS AND METHOD OF USE |
DE102012010521A1 (en) * | 2012-05-25 | 2013-11-28 | GM Global Technology Operations LLC (n. d. Gesetzen des Staates Delaware) | Heat exchanger for motor vehicle-air conditioner, has inner pipe and housing which encloses inner pipe for forming intermediate space in partial manner, where intermediate space is passed through from heat exchanger medium |
Citations (4)
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 (en) * | 1961-03-30 | 1964-04-10 | Schmoele Metall R & G | Method and device for the production of metal or steel finned tubes intended for heat exchangers or condensers etc. |
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3187537A (en) * | 1961-12-11 | 1965-06-08 | Calumet & Hecla | Floating rotation mandrel for finning |
CH485189A (en) * | 1968-12-18 | 1970-01-31 | Inst Cercetari Tehnologice Pen | Process for manufacturing oval or elliptical finned tubes and tools for carrying out the process |
-
1972
- 1972-02-07 US US00224095A patent/US3768291A/en not_active Expired - Lifetime
-
1973
- 1973-01-03 IL IL41229A patent/IL41229A/en unknown
- 1973-01-12 CA CA161,121A patent/CA994089A/en not_active Expired
- 1973-01-14 ZA ZA730087A patent/ZA7387B/en unknown
- 1973-01-15 IT IT47687/73A patent/IT976884B/en active
- 1973-01-19 ES ES410790A patent/ES410790A1/en not_active Expired
- 1973-01-22 FR FR7302073A patent/FR2171097B1/fr not_active Expired
- 1973-01-23 DE DE2303172A patent/DE2303172C3/en not_active Expired
- 1973-01-25 AT AT65073A patent/AT325388B/en not_active IP Right Cessation
- 1973-01-29 JP JP48011231A patent/JPS5211670B2/ja not_active Expired
- 1973-01-30 AR AR246341A patent/AR197801A1/en active
- 1973-01-31 EG EG40/73A patent/EG10817A/en active
- 1973-01-31 BR BR73743A patent/BR7300743D0/en unknown
- 1973-01-31 CH CH135273A patent/CH564383A5/xx not_active IP Right Cessation
- 1973-02-01 GB GB501973A patent/GB1412671A/en not_active Expired
- 1973-02-01 SE SE7301403A patent/SE399188B/en unknown
Patent Citations (4)
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 (en) * | 1961-03-30 | 1964-04-10 | Schmoele Metall R & G | Method and device for the production of metal or steel finned tubes intended for heat exchangers or condensers etc. |
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 (39)
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 |
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 |
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 |
EP0048021A2 (en) * | 1980-09-15 | 1982-03-24 | Noranda Inc. | Heat transfer device having an augmented wall surface |
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 |
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 |
EP0165583A2 (en) * | 1984-06-20 | 1985-12-27 | 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 (en) * | 1994-12-28 | 1996-07-04 | Dynamit Nobel Gmbh Explosivstoff-Und Systemtechnik | Method of manufacturing internally geared parts |
EP1208343A1 (en) * | 1999-09-03 | 2002-05-29 | Sunpower, Inc. | Heat exchanger and method of constructing same |
EP1208343A4 (en) * | 1999-09-03 | 2006-01-18 | Sunpower Inc | Heat exchanger and method of constructing same |
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 (en) * | 2001-11-16 | 2004-08-18 | Wieland-Werke AG | Heat exchange tube structured on both sides and process for making same |
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 (en) * | 2010-12-22 | 2012-10-10 | Открытое акционерное общество "Электростальский завод тяжелого машиностроения" | Method of making tubular articles with external and internal bulges |
CN103317047A (en) * | 2013-07-02 | 2013-09-25 | 山东美陵化工设备股份有限公司 | Device and method for rolling conical-fin condensing tubes |
CN103317047B (en) * | 2013-07-02 | 2014-12-03 | 山东美陵化工设备股份有限公司 | Method for rolling conical-fin condensing tubes |
WO2024037733A1 (en) * | 2022-08-16 | 2024-02-22 | Baker Hughes Energy Technology UK Limited | Supporting shaft |
Also Published As
Publication number | Publication date |
---|---|
DE2303172A1 (en) | 1973-08-09 |
BR7300743D0 (en) | 1973-12-13 |
ZA7387B (en) | 1973-10-31 |
SE399188B (en) | 1978-02-06 |
AU5143573A (en) | 1974-07-25 |
DE2303172C3 (en) | 1975-09-11 |
FR2171097B1 (en) | 1975-10-31 |
FR2171097A1 (en) | 1973-09-21 |
JPS5211670B2 (en) | 1977-04-01 |
IL41229A0 (en) | 1973-03-30 |
IL41229A (en) | 1977-01-31 |
CH564383A5 (en) | 1975-07-31 |
EG10817A (en) | 1976-10-31 |
JPS4889160A (en) | 1973-11-21 |
DE2303172B2 (en) | 1975-01-30 |
AT325388B (en) | 1975-10-27 |
AR197801A1 (en) | 1974-05-10 |
IT976884B (en) | 1974-09-10 |
ES410790A1 (en) | 1976-06-16 |
GB1412671A (en) | 1975-11-05 |
CA994089A (en) | 1976-08-03 |
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