WO2009075596A2 - Method of manufacture of finned tubes using laser welding process - Google Patents

Method of manufacture of finned tubes using laser welding process Download PDF

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Publication number
WO2009075596A2
WO2009075596A2 PCT/PL2008/000091 PL2008000091W WO2009075596A2 WO 2009075596 A2 WO2009075596 A2 WO 2009075596A2 PL 2008000091 W PL2008000091 W PL 2008000091W WO 2009075596 A2 WO2009075596 A2 WO 2009075596A2
Authority
WO
WIPO (PCT)
Prior art keywords
welding
fin
section
laser beam
tube
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.)
Ceased
Application number
PCT/PL2008/000091
Other languages
French (fr)
Other versions
WO2009075596A3 (en
Inventor
Janusz Adamiec
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.)
ENERGOINSTAL SA
Original Assignee
ENERGOINSTAL SA
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
Priority claimed from PL384019A external-priority patent/PL212542B1/en
Priority claimed from PL384020A external-priority patent/PL212535B1/en
Priority claimed from PL384018A external-priority patent/PL212547B1/en
Priority claimed from PL384341A external-priority patent/PL215860B1/en
Application filed by ENERGOINSTAL SA filed Critical ENERGOINSTAL SA
Publication of WO2009075596A2 publication Critical patent/WO2009075596A2/en
Publication of WO2009075596A3 publication Critical patent/WO2009075596A3/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • B21C37/22—Making finned or ribbed tubes by fixing strip or like material to tubes
    • B21C37/26—Making finned or ribbed tubes by fixing strip or like material to tubes helically-ribbed tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
    • B21D53/06—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of metal tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/20—Bonding
    • B23K26/21—Bonding by welding
    • B23K26/24—Seam welding
    • B23K26/30—Seam welding of three-dimensional [3D] seams
    • B23K26/302—Seam welding of three-dimensional [3D] seams of helicoidal seams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/346—Working by laser beam, e.g. welding, cutting or boring in combination with welding or cutting covered by groups B23K5/00 - B23K25/00, e.g. in combination with resistance welding
    • B23K26/348—Working by laser beam, e.g. welding, cutting or boring in combination with welding or cutting covered by groups B23K5/00 - B23K25/00, e.g. in combination with resistance welding in combination with arc heating, e.g. tungsten inert gas [TIG], metal inert gas [MIG] or plasma welding
    • 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
    • F28F1/24—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 transversely
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/04—Tubular or hollow articles
    • B23K2101/06—Tubes
    • B23K2101/08—Tubes finned or ribbed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/04—Tubular or hollow articles
    • B23K2101/14—Heat exchangers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/02—Iron or ferrous alloys
    • B23K2103/04—Steel or steel alloys

Definitions

  • the object of the invention is a method of manufacture of finned tubes, particularly tubes designed for the power industry.
  • At present finned tubes are manufactured by automatic welding using the MAG (metal active gas welding) method.
  • the joint is made using a fillet weld or a weld made under the fin.
  • the present invention consists in that a fibre laser is used in the manufacture of finned tubes.
  • a flat bar is taken and bent by mechanical means to form a U section, an L section or an I section, which is then wound by means of expedient feed rolls onto a rotating tube.
  • the laser beam or a MAG welding arc is guided on the lower surface of the U section, L section or I section and the formed fillet weld is fused by the laser beam.
  • the width of the laser beam is such that the width of the weld made is equal to 1 to 1.25 of the fin width.
  • Laser beam welding is carried out at high speed of more than 1 m/min, whereas prior to welding the tube is not pre-heated or is preheated to ca. 100 0 C. It is possible to carry out welding using a filler in the form of a wire dispensed into the area of the focused beam.
  • the method according to the invention enables high efficiency of finned tube manufacture without welding flaws, with or without the use of a filler.
  • a continuous penetration weld is obtained with very low welding deformations and a narrow heat-affected zone.
  • the application of the method increases the speed of welding, enables avoiding the use of a filler, provides a continuous penetration weld and improves the economics of manufacture.
  • Figures 1 to 4 illustrate the manner of manufacture of finned tubes with a U section using laser fusion welding (Fig. 1), with an L section using laser fusion welding (Fig. 2), with an I section using laser fusion welding (Fig. 3) and using a hybrid welding method (MAG + laser) (Fig. 4).
  • a transfer tube i with a diameter of 57.5 mm made of P235GH steel was combined with a 1.0 mm thick U-shaped, L-shaped or l-shaped fin 3 made of S235GH steel by means of a laser beam 4 at a speed of 10 m/min.
  • the U-shaped, L-shaped or l-shaped fin was pressed against the tube by mechanical means 6.
  • a 10 kW fibre laser 5 was used along with an inert gas shroud. Prior to welding the tube was heated to 50 0 C. The bond created 2 was a continuous penetration weld the hardness of which was less than 320 HV.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Geometry (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Laser Beam Processing (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)

Abstract

The method of the invention consists in that for the manufacture of finned (3) tubes (1) a fibre laser is used. A flat bar is taken and is bent by mechanical means to form a U section, an L-section or an I section, which is then wound onto a rotating tube by means of expedient feed rolls. Upon contact of the flat bar the laser beam (4) or a MAG welding arc (6) is guided on the lower surface of the U section, L section or I section and the formed fillet weld (2) is fused by the laser beam. Laser beam welding is carried out at high speed of more than 1 m/min, whereas prior to welding the tube is pre-heated to 0 - 100.

Description

Method of manufacture of finned tubes
The object of the invention is a method of manufacture of finned tubes, particularly tubes designed for the power industry.
At present finned tubes are manufactured by automatic welding using the MAG (metal active gas welding) method. The joint is made using a fillet weld or a weld made under the fin.
The present invention consists in that a fibre laser is used in the manufacture of finned tubes. A flat bar is taken and bent by mechanical means to form a U section, an L section or an I section, which is then wound by means of expedient feed rolls onto a rotating tube. Upon contact of the flat bar the laser beam or a MAG welding arc is guided on the lower surface of the U section, L section or I section and the formed fillet weld is fused by the laser beam. The width of the laser beam is such that the width of the weld made is equal to 1 to 1.25 of the fin width. Laser beam welding is carried out at high speed of more than 1 m/min, whereas prior to welding the tube is not pre-heated or is preheated to ca. 1000C. It is possible to carry out welding using a filler in the form of a wire dispensed into the area of the focused beam.
The method according to the invention enables high efficiency of finned tube manufacture without welding flaws, with or without the use of a filler. A continuous penetration weld is obtained with very low welding deformations and a narrow heat-affected zone. The application of the method increases the speed of welding, enables avoiding the use of a filler, provides a continuous penetration weld and improves the economics of manufacture.
One embodiment of the invention is presented in drawings, where Figures 1 to 4 illustrate the manner of manufacture of finned tubes with a U section using laser fusion welding (Fig. 1), with an L section using laser fusion welding (Fig. 2), with an I section using laser fusion welding (Fig. 3) and using a hybrid welding method (MAG + laser) (Fig. 4).
A transfer tube i with a diameter of 57.5 mm made of P235GH steel was combined with a 1.0 mm thick U-shaped, L-shaped or l-shaped fin 3 made of S235GH steel by means of a laser beam 4 at a speed of 10 m/min. The U-shaped, L-shaped or l-shaped fin was pressed against the tube by mechanical means 6. A 10 kW fibre laser 5 was used along with an inert gas shroud. Prior to welding the tube was heated to 500C. The bond created 2 was a continuous penetration weld the hardness of which was less than 320 HV.

Claims

Claims
1. A method of manufacture of finned tubes characterised in that for securing the fin to the tube a laser beam and a U-shaped fin section are used, wherein welding is done in downward position between section flanges along the lower part of the fin without any additional operations at speeds of more than 1 m/min, whereas the panels are pre-heated prior to welding to 0 - 1000C.
2. A method of manufacture of finned tubes characterised in that for securing the fin to the tube a laser beam and an L-shaped fin section are used, wherein welding is done in downward position between section flanges along the lower part of the fin without any additional operations at speeds of more than 1 m/min, whereas the panels are pre-heated prior to welding to 0 - 1000C.
3. A method of manufacture of finned tubes characterised in that for securing the fin to the tube a hybrid system is used: metal active gas (MAG) welding + laser beam, wherein the welding is carried out with the use of a flat bar prepared beforehand, which by means of expedient rolls is wound onto a rotating tube, and wherein the fillet weld is made using the MAG welding method and fused afterwards by means of a laser beam to provide a finned tube with a continuous complete penetration weld, the thickness of the weld being larger than the thickness of the fin.
4. A method of manufacture of finned tubes characterised in that for securing the fin to the tube a laser beam and an l-shaped fin section are used, wherein welding is done on the side of the fin without any additional operations at speeds of more than 1 m/min, whereas the panels are pre-heated prior to welding to 0 - 1000C.
PCT/PL2008/000091 2007-12-11 2008-11-28 Method of manufacture of finned tubes using laser welding process Ceased WO2009075596A2 (en)

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
PLP-384019 2007-12-11
PLP-384020 2007-12-11
PL384019A PL212542B1 (en) 2007-12-11 2007-12-11 Production method of ribbed pipes
PL384020A PL212535B1 (en) 2007-12-11 2007-12-11 Production method of ribbed pipes
PL384018A PL212547B1 (en) 2007-12-11 2007-12-11 Production method of ribbed pipes
PLP-384018 2007-12-11
PL384341A PL215860B1 (en) 2008-01-28 2008-01-28 Ribbing pipes producing method
PLP-384341 2008-01-28

Publications (2)

Publication Number Publication Date
WO2009075596A2 true WO2009075596A2 (en) 2009-06-18
WO2009075596A3 WO2009075596A3 (en) 2009-08-13

Family

ID=40409889

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/PL2008/000091 Ceased WO2009075596A2 (en) 2007-12-11 2008-11-28 Method of manufacture of finned tubes using laser welding process

Country Status (1)

Country Link
WO (1) WO2009075596A2 (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102343485A (en) * 2011-07-21 2012-02-08 青岛沈源水务科技有限公司 Welding method
RU2567936C1 (en) * 2014-06-10 2015-11-10 Закрытое акционерное общество Региональный центр лазерных технологий Device and method for linear welding of thin-sheet ribbed panel
JP2016003832A (en) * 2014-06-18 2016-01-12 株式会社ユタカ技研 Manufacturing method of fin case for heat exchanger
CN106040778A (en) * 2016-08-12 2016-10-26 东莞市奥信激光焊接设备有限公司 A high-power continuous fiber laser heat-drawing welding equipment for spiral-finned tubes
DE102016008344A1 (en) 2016-04-18 2017-10-19 Schmöle GmbH Method for producing a finned tube and finned tube
CN107971635A (en) * 2017-11-24 2018-05-01 哈尔滨工业大学 A kind of cut deal angle joint light beam-welding wire dislocation laser-MAG compound welding method
EP3391978A1 (en) * 2017-03-13 2018-10-24 Schmöle GmbH Method for producing a finned tube and heat exchanger
EP3760365A1 (en) * 2019-06-28 2021-01-06 Schmöle GmbH Finned tube and method for producing a finned tube
EP4008472A1 (en) * 2020-11-27 2022-06-08 Schmöle GmbH Method and device for producing ribbed tubes
RU2842620C1 (en) * 2025-03-31 2025-07-01 Дмитрий Владимирович Злотин Ribbed sheet panels production line

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB935077A (en) * 1959-12-24 1963-08-28 Stewarts & Lloyds Ltd Improvements in and relating to the manufacture of finned tubes
US3578165A (en) * 1969-03-03 1971-05-11 Escoa Fintube Corp Method and apparatus for manufacturing radially finned heat exchange tubing
DE3726677A1 (en) * 1987-08-11 1989-02-23 Schmoele Metall R & G METHOD AND DEVICE FOR PRODUCING HEAT EXCHANGER TUBES
US5343015A (en) * 1992-11-06 1994-08-30 Fintube Limited Partnership Laser assisted high frequency welding
DE4325129C2 (en) * 1993-07-27 1997-11-27 Thomas Dipl Ing Koebel Process for the heat-transferring fastening of single fins to pipes
DE19531726C2 (en) * 1995-08-29 1998-07-09 Deutsche Waggonbau Ag Process for achieving a decorative outer surface in the manufacture of stiffened sheet metal components, in particular in the manufacture of side walls of rail vehicles
ZA99245B (en) * 1998-01-16 1999-08-12 Aalborg Ind As A welding method, a heat exchanger tube, and an apparatus for the manufacturing of a heat exchanger tube.
WO2000038854A1 (en) * 1998-12-28 2000-07-06 Abb Alstom Power Inc. Method of fabricating fins on heat exchanger tubes
DE10020011B4 (en) * 2000-04-22 2007-10-18 BRÜNDERMANN, Georg Process for the production of finned tubes and a finned tube produced therefrom
US7154065B2 (en) * 2002-05-24 2006-12-26 Alcon Inc. Laser-hybrid welding with beam oscillation
JP2006224130A (en) * 2005-02-16 2006-08-31 Nippon Steel Corp Combined welding with laser and mag arc

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102343485A (en) * 2011-07-21 2012-02-08 青岛沈源水务科技有限公司 Welding method
RU2567936C1 (en) * 2014-06-10 2015-11-10 Закрытое акционерное общество Региональный центр лазерных технологий Device and method for linear welding of thin-sheet ribbed panel
JP2016003832A (en) * 2014-06-18 2016-01-12 株式会社ユタカ技研 Manufacturing method of fin case for heat exchanger
DE102016008344A1 (en) 2016-04-18 2017-10-19 Schmöle GmbH Method for producing a finned tube and finned tube
EP3243598A2 (en) 2016-04-18 2017-11-15 Schmöle GmbH Method of producing a finned tube using a laser beam and corresponding finned tube
CN106040778A (en) * 2016-08-12 2016-10-26 东莞市奥信激光焊接设备有限公司 A high-power continuous fiber laser heat-drawing welding equipment for spiral-finned tubes
EP3391978A1 (en) * 2017-03-13 2018-10-24 Schmöle GmbH Method for producing a finned tube and heat exchanger
CN107971635A (en) * 2017-11-24 2018-05-01 哈尔滨工业大学 A kind of cut deal angle joint light beam-welding wire dislocation laser-MAG compound welding method
EP3760365A1 (en) * 2019-06-28 2021-01-06 Schmöle GmbH Finned tube and method for producing a finned tube
EP4008472A1 (en) * 2020-11-27 2022-06-08 Schmöle GmbH Method and device for producing ribbed tubes
RU2842620C1 (en) * 2025-03-31 2025-07-01 Дмитрий Владимирович Злотин Ribbed sheet panels production line

Also Published As

Publication number Publication date
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