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US2508517A - Method of forming integral fins on tubing - Google Patents

Method of forming integral fins on tubing Download PDF

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Publication number
US2508517A
US2508517A US619712A US61971245A US2508517A US 2508517 A US2508517 A US 2508517A US 619712 A US619712 A US 619712A US 61971245 A US61971245 A US 61971245A US 2508517 A US2508517 A US 2508517A
Authority
US
United States
Prior art keywords
tubing
tube
diameter
portions
pressure
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
US619712A
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 US619712A priority Critical patent/US2508517A/en
Priority to GB18404/49A priority patent/GB651829A/en
Priority to ES175071A priority patent/ES175071A1/es
Application granted granted Critical
Publication of US2508517A publication Critical patent/US2508517A/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
    • 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
    • Y10T29/49382—Helically finned
    • 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
    • Y10T29/49385—Made from unitary workpiece, i.e., no assembly

Definitions

  • WALTER P. HILL Y www ATTORN EYS asoasrr method for iinning tubing is the elemination of axial compression of the iin during the development of the same.
  • the pressure which may be applied to the tube by one or more forming rolls is directed substantially radially inward and has no component directed axiallytowards the nn during its development.
  • this radially inward pressure will produce a displacement of material which can flow substantially only in an axial direction while beneath the displacing surface but will be extruded radially outward at a point beyond said surface.
  • extrusion is due to the combination of the axially directed pressure on the displaced material and the reaction of the body of'the tube against elongation thereof resulting in radial outward deflection. If the tube is confined so as to permit extrusion only through the root of the iin, then the entire fin will be developed from radially outwardly directed extruded material. In orderl however, to fashion the n to the desired cross sectional contour, the extruded material must be coniined between axially spaced surfaces of corresponding contour. As these surfaces are in xed relation to each other, they cannot axially compress the material therebetween but only direct it radially.
  • A is a suitable frame including a pair of spaced paral- Y lelly arranged heads B and B' having bearings therein for rocker members C, C' and C3 extending therebetween and equispaced from each other.
  • Each of these rocker members has eccentrically Journaled therein an arbor D for carrying a forming roll E. ⁇
  • the rocker members are connected to each other through the medium of radially outwardly extending arms C3 and connected links C4 so that when one of said members is rocked a similar rocking movement will be imparted to each of the others.
  • the arbors D and rolls E may be simultaneously moved radii ally towards or from a central axis therebetween which is the axis of the tube to be finned.
  • Each of the rolls E has a series of annular peripheral portions E', E. E3, E4, E5 separated from each other by grooves F, F', F, F3- which are slightly tapered in an inward direction.
  • the portion E is substantially V-shaped in cross section with a radius curve at its outer end and is adapted to press a groove in the outer portion of the tube wall which extends helically thereabout (as hereinafter described).
  • the portion E2, E3 and ⁇ E4 have their peripheral surfaces substantially straight in an axial direction but at a slight angle to the axis of the work. These surfaces are also progressively slightly increased-in width axially with a corresponding progressive decrease in the width of the grooves therebetween.
  • the portion E5 has a peripheral face of still greater width which is parallel to the axis of the tube. It
  • ⁇ is to be understood that the axis of the rolls and the arbors carrying the same are at an angle to the axis of the work tube so that the portions E', E2, etc. are at the desired helix angle.
  • the portion E' will advance said tube axially and the portions E2 E3, E4 and E5 will successively traverse substantially the same helical path radially inwardly depressing the outer portion of the wall of the tube.
  • the face of the portion lil'v adjacent to the groove F is substantially perpendicular to the axis of the work tube andwill. therefore, compel the axial advancement of said tubing and resist any stress tending to move the same in the opposite direction.
  • portions E. E3 and E4 will be forced to ilow axially therebe neath until in registration with the grooves which permit radial outward extrusion into said grooves.
  • these portions will overlap portions of the tube wall not previously depressed and will force these radially inward.
  • the width of the iinal groove FU and the extruded material therein will be less than that of the first groove but the pressure exerted on the material during its displacement will always be radially inwardly directed without exerting anyv axial lcompression of the extruded material in the groove.
  • the work tube G while operated upon by the rolls is supported by a mandrel I which extends beneath the portions E', E2, E3, E* and E5.
  • T-his mandrel is anchored at a remote point (not shown) and is of suiiicient length to receive the tube which is operated upon.
  • both mandrel and tube are floating with respect to the rolls engaging the same.
  • 'I'he finned tube resulting from this process willhave the fins thereof of substantially uniform texture and -substantially free from work hardening on the surface portions thereof.
  • peripheral edge of the iin will be convex in cross sectional contour, whereas the peripheral contour of the tips of ns produced by axial compression is concave and is subject to the development of cracks which may extend inward to the tube.
  • the physical characteristics of the product are greatly improved.
  • the original tube is preferably of this larger diameter.
  • the rolls E are then provided with conical portions E which, first, come in contact with the tube while it is axially advanced and will reduce its diameter in advance of contact with the roll portion E'.
  • Each of the succeeding portions will perform a further reduction in the diameter of the tube until limited by the mandrel I.
  • the material displaced in this progressive decrease in diameter of the tube will be forced axially so that the portion of the tube on which the fins are developed will be increased in length.
  • the nned tubing produced by my improved method may have the fins thereof of any desired height in comparison with the diameter of the original tube.
  • the ,ns G are no greater in height than the original diameter of the tube G.
  • the ns H' are of considerably greater diameter than that of the original tube H.
  • the method of forming a length of tubing with an integral helically extending fin which comprises applying a circumferential rolling pressure to a length of tubing in a generally radiallyinward direction against axially spaced substantially helically aligned peripheral portions, and transmitting the radiallyinwardly directed pressure into a primary resultant pressure acting in a generally radially outward direction to displace material from the wall of the tubing radially outwardly between the axially spaced peripheral portions to form a helically extending n.
  • the method of forming a length of tubing with an integral helically extending fin which comprises initially reducing the diameter of the length of tubing by applying a circumferential rolling pressure on the wall of the tubing and thereafter further reducing the diameter of the tubing by applying a circumferential rolling pressure in a radially inward direction against axially spaced helically aligned peripheral portions ofl progressively increasing axial extent, and transmitting the radially inwardly directed pressure into a primary resultant pressure acting in a generally radially outward direction to displace material from the wall of the tubing radially outwardly between the axially spaced peripheral portions to form a helically extending iin on the reduced length of tubing.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Metal Rolling (AREA)
US619712A 1945-10-01 1945-10-01 Method of forming integral fins on tubing Expired - Lifetime US2508517A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US619712A US2508517A (en) 1945-10-01 1945-10-01 Method of forming integral fins on tubing
GB18404/49A GB651829A (en) 1945-10-01 1946-09-27 Integral finned tubing and method of forming the same
ES175071A ES175071A1 (es) 1945-10-01 1946-10-24 Un procedimiento de fabricación de tubos con aletas de una pieza

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US619712A US2508517A (en) 1945-10-01 1945-10-01 Method of forming integral fins on tubing

Publications (1)

Publication Number Publication Date
US2508517A true US2508517A (en) 1950-05-23

Family

ID=24482979

Family Applications (1)

Application Number Title Priority Date Filing Date
US619712A Expired - Lifetime US2508517A (en) 1945-10-01 1945-10-01 Method of forming integral fins on tubing

Country Status (3)

Country Link
US (1) US2508517A (es)
ES (1) ES175071A1 (es)
GB (1) GB651829A (es)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2686353A (en) * 1950-06-06 1954-08-17 Acme Ind Inc Method of assembling tubes in spacer plates
US2760389A (en) * 1952-07-31 1956-08-28 Walter P Hill Machine for producing finned tubing
US3149512A (en) * 1960-06-30 1964-09-22 William H Leinbach Method of rolling a tubing with a controlled wall thickness
US3262295A (en) * 1961-07-20 1966-07-26 Boleslaw M Woloszynek Finned tube, apparatus and method for making same
US3498095A (en) * 1965-03-29 1970-03-03 Rotary Profile Anstalt Profiling of annular workpieces
DE2110485A1 (de) * 1970-03-04 1971-09-16 Trane Co Vorrichtung zur Schaffung eines Rohres mit schraubenfoermigen Rippen auf der Aussenseite
US3855832A (en) * 1974-01-21 1974-12-24 A Novak Method of and apparatus for manufacturing integral finned tubing
USD320091S (en) 1987-12-24 1991-09-17 Jean-Paul Paquette Shingle
US20060096744A1 (en) * 2004-11-09 2006-05-11 Denso Corporation Double-wall pipe, method of manufacturing the same and refrigerant cycle device provided with the same

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PL139848B1 (en) * 1983-03-31 1987-02-28 Zaklady Urzadzen Chem Method of pressing of fins on pipes

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE389292C (de) * 1922-04-22 1924-02-06 Kurt Wiesinger Walzverfahren fuer Rippenrohre
US1758495A (en) * 1925-04-18 1930-05-13 Oil Conservation Engineering C Condenser construction
US1761733A (en) * 1927-12-05 1930-06-03 Wolverine Tube Company Integral finned tubing and method of manufacturing the same
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
US2337490A (en) * 1940-04-15 1943-12-21 Calumet And Hecla Cons Copper Method of manufacturing integral finned tubing
US2404575A (en) * 1943-06-21 1946-07-23 Calumet And Hecla Cons Copper Method of manufacturing finned tubes with support engaging bearing portions

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE389292C (de) * 1922-04-22 1924-02-06 Kurt Wiesinger Walzverfahren fuer Rippenrohre
US1878117A (en) * 1925-04-15 1932-09-20 Foster Wheeler Corp Method of and apparatus for metal rolling
US1758495A (en) * 1925-04-18 1930-05-13 Oil Conservation Engineering C Condenser construction
US1761733A (en) * 1927-12-05 1930-06-03 Wolverine Tube Company Integral finned tubing and method of manufacturing the same
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
US2404575A (en) * 1943-06-21 1946-07-23 Calumet And Hecla Cons Copper Method of manufacturing finned tubes with support engaging bearing portions

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2686353A (en) * 1950-06-06 1954-08-17 Acme Ind Inc Method of assembling tubes in spacer plates
US2760389A (en) * 1952-07-31 1956-08-28 Walter P Hill Machine for producing finned tubing
US3149512A (en) * 1960-06-30 1964-09-22 William H Leinbach Method of rolling a tubing with a controlled wall thickness
US3262295A (en) * 1961-07-20 1966-07-26 Boleslaw M Woloszynek Finned tube, apparatus and method for making same
US3498095A (en) * 1965-03-29 1970-03-03 Rotary Profile Anstalt Profiling of annular workpieces
DE2110485A1 (de) * 1970-03-04 1971-09-16 Trane Co Vorrichtung zur Schaffung eines Rohres mit schraubenfoermigen Rippen auf der Aussenseite
US3648502A (en) * 1970-03-04 1972-03-14 Trane Co Method and apparatus for forming a heat exchanger tube with closely spaced integral fins
US3855832A (en) * 1974-01-21 1974-12-24 A Novak Method of and apparatus for manufacturing integral finned tubing
USD320091S (en) 1987-12-24 1991-09-17 Jean-Paul Paquette Shingle
US20060096744A1 (en) * 2004-11-09 2006-05-11 Denso Corporation Double-wall pipe, method of manufacturing the same and refrigerant cycle device provided with the same
US20060112556A1 (en) * 2004-11-09 2006-06-01 Denso Corporation Method and apparatus of manufacturing grooved pipe, and structure thereof
US7866378B2 (en) 2004-11-09 2011-01-11 Denso Corporation Double-wall pipe, method of manufacturing the same and refrigerant cycle device provided with the same
US20110073208A1 (en) * 2004-11-09 2011-03-31 Denso Corporation Double-wall pipe, method of manufacturing the same and refrigerant cycle device provided with the same
US9669499B2 (en) 2004-11-09 2017-06-06 Denso Corporation Double-wall pipe, method of manufacturing the same and refrigerant cycle device provided with the same

Also Published As

Publication number Publication date
ES175071A1 (es) 1947-06-01
GB651829A (en) 1951-04-11

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