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US2562785A - Integral finned tube - Google Patents

Integral finned tube Download PDF

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Publication number
US2562785A
US2562785A US647038A US64703846A US2562785A US 2562785 A US2562785 A US 2562785A US 647038 A US647038 A US 647038A US 64703846 A US64703846 A US 64703846A US 2562785 A US2562785 A US 2562785A
Authority
US
United States
Prior art keywords
tube
portions
finned
diameter
wall
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
US647038A
Other languages
English (en)
Inventor
Walter P Hill
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.)
CALUMET AND HECLA CONS COPPER
Original Assignee
CALUMET AND HECLA CONS COPPER
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 CALUMET AND HECLA CONS COPPER filed Critical CALUMET AND HECLA CONS COPPER
Priority to US647038A priority Critical patent/US2562785A/en
Priority to ES176746A priority patent/ES176746A1/es
Application granted granted Critical
Publication of US2562785A publication Critical patent/US2562785A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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, 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
    • F28F1/08—Tubular elements crimped or corrugated in longitudinal section
    • 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
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/34—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending obliquely
    • F28F1/36—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending obliquely the means being helically wound fins or wire spirals
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4935—Heat exchanger or boiler making
    • Y10T29/49377—Tube with heat transfer means
    • Y10T29/49378—Finned tube
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49396—Condenser, evaporator or vaporizer making

Definitions

  • the invention relates to the manufacture of heat exchangeapparatus and more particularly to the tubing used in such structures as, for instance, condensers, evaporators for refrigeration, etc.
  • the finned portions are harder and of greater rigidity than the unfinned portions or conversely the unfinned portions are free from work hardening which facilitates rolling the same into engagement with a wall of a casing.
  • the fins are devoloped from the wall of a plain tube to project radially outward beyond the original diameter of said tube.
  • the more specific product which forms a portion of the subject matter of the instant application is a tube having unfinned portions and finned portions with the diameter of the fins no greater than the external diameter of the unfinned portions. These unfinned portions are preferably at opposite ends of the tube but there may also be one or more intermediate unfinned portions where the tube is designed to extend through bafiles.
  • the apparatus used in carrying out the method is not a part of the instant invention and will only be described generally as comprising one or more forming rolls for relatively travelling helically about the tube operated upon and a mandrel for supporting the tube permitting axial advancement thereof.
  • Fig. l is a longitudinal section showing one of the forming rolls in engagement with a tube to be finned;
  • Fig. 2 is a diagrammatic cross section showing a plurality of rolls distributed about the work tube and mandrel;
  • Figs. 3, 4 and 5 are diagrams showing the successive operations in the finning of a tube
  • Fig. 6 is a longitudinal section through a finned tube having unfinned end portions
  • Fig. 7 is a similar view showing a tube with unfinned end portions and one or more intermediate unfinned portions;
  • Fig. 8 shows a portion of a wall of a casing with a tube connected into the same
  • the rolls A are mounted upon arbors B and are distributed about the axis of the work tube C which latter has within the same a mandrel D connected by a shank E to an anchor point (not shown).
  • the axes of the arbors B are at such an angle to the axis of the mandrel and tube as to travel a helical path thereabout and there is also provision for moving the arbors radially towards or from the axis of the tube.
  • Each roll A has a series of spaced disc-like portions F, F, F", F and F spaced to form therebetween in- 3 wardly slightly tapering grooves G, G, G? and G
  • the portion F has its peripheral face extending axially in a. straight line parallel to the axis of the tube.
  • the portion F is of a substantially V-shape cross section but with a radius curve at its outer end.
  • the portions F. I", F have their peripheral faces inclined axially with respect to the axis of the tube and also generally tapering radially inward from the portion F to the portion F.
  • Adjacent to the root of the portion F is a conical portion F tapering in the same direction as the portions F, F". F and F.
  • plain tubing C of a diameter and wall thickness suitable for the uniinned portions of'the finned tube is placed and axially advance the same causing the rolls to traverse a helical path. Due to the tapering form of each roll the large diameter portion F thereof will first come in contact and by its radial pressure will progressively contract the tube to form a tapering portion C and an opposite flaring portion 0. This continues until all of the portion F, F, F, F and F are in contact with the portion C whereupon continued helical advancement of the tube will develop fins on the contracted diameter portion thereof.
  • the portion F first presses inward to form a helical groove and the portions F, F, F", F and F successively track this groove but widen it by pressing inward additional areas of the tube until finally the groove is of a width equal to the axial width of the portion F.
  • All of the grooves are formed by radial inward displacement of material in the helical path and substantially without axial pressure against the material between adjacent convolutions of the helix. Consequently, this intermediate material will form a fin of substantially uniform texture and with but slight work hardening of its outer faces.
  • the displaced material will flow axially beneath the displacing surface and also by the reaction of the tube wall against elongation will tend to extrude some of the material radialb' outward in the grooves G, G, G and (3.
  • the extrudedflns cannot exceed the diameter of the original tube.
  • the continuing operation will reduce the diameter and thickness of the tube wall and develop fins projecting therefrom which all are -of a uniform height not greater than the external diameter of the original tube. Wherever in the length of the tube it is desired to leave an unfinned portion, this may be accomplished by gradually withdrawing the rolls radially outward during the continued helical advancement of the tube until they completely clear the tube.
  • the process may be repeated as above described. It is, therefore, apparent that the finned and unfinned portions may be alternated as many times as desired throughout the length of the tube operated upon. Also, it will be understood that the uniinned portions of the tube are not subjected to any work hardening operation so that they will remain in the same condition as the original blank. This is particularly advantageous where these unflnned portions are to be subseto a casing wall.
  • the wall thickness of the finned portions of the tube can be regulated by the diameter of the mandrel and displaced material in excess of that required for forming the wall will produce an axial elongation thereof.
  • the original wall thickness of the tubing may be selected with respect to the desired thickness of the untlnned portions of the tube, while the finned portions thereof may be made of any predetermined wall thickness.
  • the tips of the fins will be convex in cross sectional contour and free from any roughness or cracks which might initiate a fracture of the tube.
  • a length of finned tubing comprising axially spaced plain sections having cylindrical walls with malleable characteristics corresponding to the original stock from which the tubing is produced.
  • a length of finned tubing comprising a finned section and a plain section provided with a cylindrical wall having malleable characteristics corresponding to the original stock from which the length of the tubing is produced, said finned qmtlyfuhionodintbeattachmentoftbeume 1 outwardlyfromtbaiianedloctioalafliinlmgum-res 5 gressively increasing in depth from the plain section to said part and having a maximum diameter no greater than the external diameter of the plain section.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Geometry (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Metal Extraction Processes (AREA)
US647038A 1946-02-12 1946-02-12 Integral finned tube Expired - Lifetime US2562785A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US647038A US2562785A (en) 1946-02-12 1946-02-12 Integral finned tube
ES176746A ES176746A1 (es) 1946-02-12 1947-02-08 Un procedimiento de formar tubos con aletas

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US647038A US2562785A (en) 1946-02-12 1946-02-12 Integral finned tube

Publications (1)

Publication Number Publication Date
US2562785A true US2562785A (en) 1951-07-31

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US647038A Expired - Lifetime US2562785A (en) 1946-02-12 1946-02-12 Integral finned tube

Country Status (2)

Country Link
US (1) US2562785A (es)
ES (1) ES176746A1 (es)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2749607A (en) * 1950-11-15 1956-06-12 Copperweld Steel Co Method of producing composite curved metallic shapes
US3137926A (en) * 1957-04-02 1964-06-23 Fairey Eng Formation of fins on metal bar or tube stock
US3262295A (en) * 1961-07-20 1966-07-26 Boleslaw M Woloszynek Finned tube, apparatus and method for making same
US3314260A (en) * 1964-07-01 1967-04-18 Calumet & Hecla Method and apparatus for producing finned metal tubing
EP0292127A3 (en) * 1987-04-29 1989-05-24 Peerless Of America, Inc. Finned heather exchanger tubing with varying wall thickness
US20100139902A1 (en) * 2008-12-05 2010-06-10 Baylis Bobbye K Plastic heat exchanger
US20110021278A1 (en) * 2007-11-30 2011-01-27 Frederick Rieber Enclosed slide

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11409A (en) * 1854-08-01 Steam-boiler
US1606336A (en) * 1926-05-13 1926-11-09 Lee J Black Condenser pipe
US1865575A (en) * 1928-11-30 1932-07-05 Wolverine Tube Company Apparatus for manufacturing integral finned tubing
US1878117A (en) * 1925-04-15 1932-09-20 Foster Wheeler Corp Method of and apparatus for metal rolling
US1901516A (en) * 1929-11-14 1933-03-14 Kellogg M W Co Method and machine for rolling fins on tubes
US2238798A (en) * 1937-03-10 1941-04-15 Kurt Lenk Method of and means for the production of ribbed tubes
US2330556A (en) * 1940-06-13 1943-09-28 Carrier Corp Method of enlarging tube ends
US2337490A (en) * 1940-04-15 1943-12-21 Calumet And Hecla Cons Copper Method of manufacturing integral finned tubing

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11409A (en) * 1854-08-01 Steam-boiler
US1878117A (en) * 1925-04-15 1932-09-20 Foster Wheeler Corp Method of and apparatus for metal rolling
US1606336A (en) * 1926-05-13 1926-11-09 Lee J Black Condenser pipe
US1865575A (en) * 1928-11-30 1932-07-05 Wolverine Tube Company Apparatus for manufacturing integral finned tubing
US1901516A (en) * 1929-11-14 1933-03-14 Kellogg M W Co Method and machine for rolling fins on tubes
US2238798A (en) * 1937-03-10 1941-04-15 Kurt Lenk Method of and means for the production of ribbed tubes
US2337490A (en) * 1940-04-15 1943-12-21 Calumet And Hecla Cons Copper Method of manufacturing integral finned tubing
US2330556A (en) * 1940-06-13 1943-09-28 Carrier Corp Method of enlarging tube ends

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2749607A (en) * 1950-11-15 1956-06-12 Copperweld Steel Co Method of producing composite curved metallic shapes
US3137926A (en) * 1957-04-02 1964-06-23 Fairey Eng Formation of fins on metal bar or tube stock
US3262295A (en) * 1961-07-20 1966-07-26 Boleslaw M Woloszynek Finned tube, apparatus and method for making same
US3314260A (en) * 1964-07-01 1967-04-18 Calumet & Hecla Method and apparatus for producing finned metal tubing
EP0292127A3 (en) * 1987-04-29 1989-05-24 Peerless Of America, Inc. Finned heather exchanger tubing with varying wall thickness
US20110021278A1 (en) * 2007-11-30 2011-01-27 Frederick Rieber Enclosed slide
US8382602B2 (en) 2007-11-30 2013-02-26 Frederick Rieber Enclosed slide
US20100139902A1 (en) * 2008-12-05 2010-06-10 Baylis Bobbye K Plastic heat exchanger
EP2204628A1 (de) * 2008-12-05 2010-07-07 Mahle International GmbH Kunststoff-Wärmeübertrager

Also Published As

Publication number Publication date
ES176746A1 (es) 1947-06-16

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