US3855832A - Method of and apparatus for manufacturing integral finned tubing - Google Patents

Method of and apparatus for manufacturing integral finned tubing Download PDF

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Publication number
US3855832A
US3855832A US00434955A US43495574A US3855832A US 3855832 A US3855832 A US 3855832A US 00434955 A US00434955 A US 00434955A US 43495574 A US43495574 A US 43495574A US 3855832 A US3855832 A US 3855832A
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US
United States
Prior art keywords
roll
tube
work
axis
projections
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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US00434955A
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English (en)
Inventor
A Novak
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to US00434955A priority Critical patent/US3855832A/en
Priority to DE2441685A priority patent/DE2441685A1/de
Priority to JP49101280A priority patent/JPS50104167A/ja
Application granted granted Critical
Publication of US3855832A publication Critical patent/US3855832A/en
Priority to JP564875A priority patent/JPS5325921B2/ja
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

  • Tubing having integral fins has been produced heretofore by subjecting a length of tubular stock to the action of a set of forming rolls. Typically, three rolls equally spaced around a straight length of tube to be finned are employed, each roll being mounted on a head for movement substantially radially into and out of engagement with the stock. Each forming roll has a plurality of axially spaced annular work-forming projections of graduated diameter.
  • the axes of the arbors are inclined with respect to the axis of the stock at an angle corresponding to the desired helix angle of the fin to be formed.
  • the rolls are rotated around their individual axes to cause the work to rotate and to feed in a direction toward the larger work-forming projections.
  • the larger projections engage the work first
  • the first-engaging projections are required to work harder than normal during feed-in of the rolls, causing excessive work hardening and tending to trap metal behind them.
  • Such metal is deformed in a localized area to form an initial hump-like fin section of greater than normal height, while in addition the excessive work hardeningof the metal of the stock increases the load upon the following projections of lesser height.
  • the overall object of the present invention can be summarized as to overcome the aforementioned shortcomings of existing methods and to provide an improved method and apparatus for forming at high rotational speeds on thin walled tubing closely spaced fins having a multiplicity of leads while still obtaining short transition tapers from plain sections of the tubing to full fin depth.
  • Another object is to provide such an improved method and apparatus which eliminates the aforementioned oversize fin diameter or hump" characteristic of finned tube transition portions when manufactured with such prior known apparatus.
  • FIG. I is a plan view of apparatus used in connection with the present invention, showing a portion of a tube to be finned and a forming roll in the start position;
  • FIG. 2 is an elevational view of the same in the start position
  • FIG. 3 is a plan view of the roll and tube in the rolling position
  • FIG. 4 is an elevational view of the roll and tube in the rolling position.
  • Reference character 10 designates generally a forming roll, comprised, in the instance depicted, of a plurality of discs of graduatedly increasing diameter and the peripheral work-engaging portions of which are contoured in a known manner to progressively deform the tube Wto be worked on so as to extrude fins outwardly from the material of the tube.
  • Five discs, 1 1, 12, 13, 14 and 15 are shown, although a greater number are normally used.
  • the details as to number and form of the discs do not form a part of the present invention, and in fact the annular work-forming projections which constitute the peripheral portions of the discs could be formed as integral contourings of a solid roll.
  • the finning operating is performed by a plurality of such rolls, typically three in number, arranged around the work.
  • the inclination of the forming discs to the axis, and the spacing between the work-forming projections of the discs are such that each disc subsequent to the leading disc 1 1 engages and performs additional deforming work upon an area worked upon by the preceding disc of the set.
  • the discs and the inclination to the axis may be so arranged that they form either a single helical fin or multiple sets of helices (Multiple start" finning). The multiple start method is preferred, since it permits a more rapid operation.
  • the work tube W may be supported on and backed by a suitable internal mandrel 16 in accordance with known practice.
  • All of the rolls of the set are arranged for simultaneous operation. Only a single' roll and spindle are shown, since all are alike, but each roll, as shown in the drawing, is fast on a spindle or arbor S.
  • the spindles are simultaneously synchronously rotatable in the same angular direction, and cause the work to rotate and to advance due to the frictional engagement between the rolls and the work.
  • Each of the spindles is supported upon a fixed axis, but the spindles, and the rolls carried thereby, are movable in a straight path, longitudinally of the spindle axes, to move the rolls between a retracted or start position, shown in FIGS. 1 and 2, in which they are clear of the work, and the working position shown in FIGS. 3 and 4, in which they are in a fully engaged and effectively meshed work-forming relation with the work.
  • the work travels from right to left, as viewed in the drawing, while the work rolls are fed into the work from left to right.
  • the smooth tube area 20 which may, for example, be for connection purposes
  • the subsequent threaded area 22 is abrupt.
  • there is no initial excessive work hardening such as occurs where the rolls are moved into the work radially.
  • the method of making finned tubing which comprises providing a tube to be finned and which is rotatable about a fixed axis, providing a forming roll having a series of annular forming projections thereon of sequentially increasing diameter, the tube also being movable longitudinally of its axis relatively to the roll, driving the roll rotatably about an axis which is inclined with relation to the axis of the tube and which is spaced from the tube at a fixed distance such that when the roll is at the closest crossing point of such axes the projections are in full working engagement with the tube, characterized by moving the roll longitudinally of its axis of rotation from a start-position in which the roll is disengaged from the tube to said position of full engagement and maintaining such full engagement while driving the roll and tube in synchronous meshed engagement about their respective axes and permitting the tube to move longitudinally of its axis relatively to the rolls, whereby the projections deform a helical section of the tube, the path of longitudinal movement of the points of engagement of

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Metal Extraction Processes (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
US00434955A 1974-01-21 1974-01-21 Method of and apparatus for manufacturing integral finned tubing Expired - Lifetime US3855832A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US00434955A US3855832A (en) 1974-01-21 1974-01-21 Method of and apparatus for manufacturing integral finned tubing
DE2441685A DE2441685A1 (de) 1974-01-21 1974-08-30 Verfahren und vorrichtung zur herstellung einteilig ausgebildeter rippenrohre
JP49101280A JPS50104167A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1974-01-21 1974-09-03
JP564875A JPS5325921B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1974-01-21 1975-01-13

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00434955A US3855832A (en) 1974-01-21 1974-01-21 Method of and apparatus for manufacturing integral finned tubing

Publications (1)

Publication Number Publication Date
US3855832A true US3855832A (en) 1974-12-24

Family

ID=23726395

Family Applications (1)

Application Number Title Priority Date Filing Date
US00434955A Expired - Lifetime US3855832A (en) 1974-01-21 1974-01-21 Method of and apparatus for manufacturing integral finned tubing

Country Status (3)

Country Link
US (1) US3855832A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (2) JPS50104167A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE2441685A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5761807A (en) * 1994-06-15 1998-06-09 Wieland-Werke Ag Method of manufacture of a multiple finned tube
CN103191979A (zh) * 2013-03-27 2013-07-10 金龙精密铜管集团股份有限公司 一种加工翅片管的刀具组合
WO2014161447A1 (zh) * 2013-03-31 2014-10-09 上海泛华紧固系统有限公司 用于滚压管外螺纹的方法、滚压头及其设备

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5736556A (en) * 1980-08-14 1982-02-27 Toshiba Corp Liquid cooling type rotary electric machine
JPH0698412B2 (ja) * 1989-01-10 1994-12-07 新日本製鐵株式会社 管俸の多条フイン付け加工装置
JPH0498726U (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1991-01-22 1992-08-26

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2508517A (en) * 1945-10-01 1950-05-23 Calumet And Hecla Cons Copper Method of forming integral fins on tubing
US3132545A (en) * 1960-05-20 1964-05-12 Vincenzo S Arata Cycloidal rolling mill
US3327512A (en) * 1964-12-28 1967-06-27 Calumet & Hecla Fine pitch finned tubing and method of producing the same
US3735617A (en) * 1970-10-19 1973-05-29 Siemag Siegener Masch Bau Rolling mill

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2508517A (en) * 1945-10-01 1950-05-23 Calumet And Hecla Cons Copper Method of forming integral fins on tubing
US3132545A (en) * 1960-05-20 1964-05-12 Vincenzo S Arata Cycloidal rolling mill
US3327512A (en) * 1964-12-28 1967-06-27 Calumet & Hecla Fine pitch finned tubing and method of producing the same
US3735617A (en) * 1970-10-19 1973-05-29 Siemag Siegener Masch Bau Rolling mill

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5761807A (en) * 1994-06-15 1998-06-09 Wieland-Werke Ag Method of manufacture of a multiple finned tube
US5803164A (en) * 1994-06-15 1998-09-08 Wieland-Werke Ag Multiple finned tube and a method for its manufacture
CN103191979A (zh) * 2013-03-27 2013-07-10 金龙精密铜管集团股份有限公司 一种加工翅片管的刀具组合
CN103191979B (zh) * 2013-03-27 2015-04-01 金龙精密铜管集团股份有限公司 一种加工翅片管的刀具组合
WO2014161447A1 (zh) * 2013-03-31 2014-10-09 上海泛华紧固系统有限公司 用于滚压管外螺纹的方法、滚压头及其设备
US10399140B2 (en) 2013-03-31 2019-09-03 Shanghai Pan-China Fastening System Co., Ltd. Method for rolling external pipe threads, rolling head and device thereof

Also Published As

Publication number Publication date
JPS50104167A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1975-08-16
DE2441685A1 (de) 1975-07-24
JPS5325921B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1978-07-29
JPS50102805A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1975-08-14

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