WO2007113317A1 - Procedure for manufacture of a tube for conveyance of a fluid of a heat exchanger, and tube obtained by such procedure - Google Patents

Procedure for manufacture of a tube for conveyance of a fluid of a heat exchanger, and tube obtained by such procedure Download PDF

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Publication number
WO2007113317A1
WO2007113317A1 PCT/EP2007/053309 EP2007053309W WO2007113317A1 WO 2007113317 A1 WO2007113317 A1 WO 2007113317A1 EP 2007053309 W EP2007053309 W EP 2007053309W WO 2007113317 A1 WO2007113317 A1 WO 2007113317A1
Authority
WO
WIPO (PCT)
Prior art keywords
tube
corrugations
procedure
metal sheet
procedure according
Prior art date
Application number
PCT/EP2007/053309
Other languages
French (fr)
Inventor
Jesus Jimenez Palacios
Aurelio Colom Izquierdo
Original Assignee
Valeo Termico S.A.
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 Valeo Termico S.A. filed Critical Valeo Termico S.A.
Priority to EP07727780A priority Critical patent/EP2001612A1/en
Priority to US12/295,898 priority patent/US20100012306A1/en
Publication of WO2007113317A1 publication Critical patent/WO2007113317A1/en

Links

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
    • B21C37/08—Making tubes with welded or soldered seams
    • 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
    • B21C37/08—Making tubes with welded or soldered seams
    • B21C37/0803—Making tubes with welded or soldered seams the tubes having a special shape, e.g. polygonal 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
    • B21D53/04—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of sheet metal
    • 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
    • B21C37/156—Making tubes with wall irregularities
    • B21C37/158—Protrusions, e.g. dimples
    • 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
    • B21D13/00—Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form
    • 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
    • B21D31/00—Other methods for working sheet metal, metal tubes, metal profiles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/11—Manufacture or assembly of EGR systems; Materials or coatings specially adapted for EGR systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/29—Constructional details of the coolers, e.g. pipes, plates, ribs, insulation or materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/03—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits
    • F28D1/0391—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits a single plate being bent to form one or more conduits
    • 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
    • F28F1/424—Means comprising outside portions integral with inside portions
    • F28F1/426—Means comprising outside portions integral with inside portions the outside portions and the inside portions forming parts of complementary shape, e.g. concave and convex
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
    • F28F3/042—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element
    • F28F3/046—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element the deformations being linear, e.g. corrugations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D21/0001—Recuperative heat exchangers
    • F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2255/00—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes
    • F28F2255/10—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes made by hydroforming

Definitions

  • the present invention relates to a procedure for manufacture of a tube for conveyance of a fluid of a heat exchanger.
  • the invention also relates to the tube obtained by such procedure.
  • the invention is particularly applicable in exchangers having recirculation of exhaust gases from an engine (EGRC) .
  • EGRC engine
  • heat exchangers for cooling gases for example those employed in systems of recirculation of exhaust gases towards the admission of an explosion engine
  • EGR exhaust Gas Recirculation
  • Tubes for gas of rectangular section are known suitable for fitting in an optimised manner within the housing of an exchanger of rectangular section.
  • Such tubes of rectangular section are manufactured from a circular tube and may also present corrugations having the objective of improving thermal performance of the heat exchanger.
  • corrugations extend along the length of the tube, however without reaching the radius of the tube, i.e. the unformed circular ends thereof.
  • the starting material is a smooth tube of circular section obtained commencing from a bent and welded sheet.
  • the tube is subjected to a hydroforming process including two stages: firstly forming of the tube is proceeded to it going from having a circular section to a substantially rectangular section, and subsequently the corrugations are realised. Finally, cutting off the ends of the tube and deburring is realised, if required.
  • the objective of the procedure for manufacture of a tube for conveyance of a fluid of a heat exchanger of the present invention is to overcome the disadvantages presented by the procedures known in the art, providing a procedure for manufacture of the tubes having a lower cost .
  • the corrugations are embossed in those zones of the metal sheet corresponding to the opposed walls of greater width of the tube once fabricated, attaining part of the rounded walls of lesser width.
  • the corrugations are defined by a plurality of mutually parallel linear grooves transversely crossing said walls of greater width in a direction substantially diagonal to the axis of the tube.
  • such corrugations are embossed along the metal sheet, attaining the extreme ends or avoiding the extreme ends.
  • such corrugations are distributed in a manner being mutually non-equidistant, and non ⁇ symmetrical with respect to the bend line, having the objective of improving the loss of load.
  • corrugations are distributed maintaining the same angle of inclination such that once the metal sheet has been bent, corrugations of one wall are positioned in a crossed manner with reference to those of the opposed wall, each pair of associated corrugations defining a projection substantially in the form of an X.
  • the metal sheet is bent in half in accordance with a longitudinal central line.
  • the invention also relates to a tube for conveyance of a fluid of a heat exchanger of the type obtained employing the procedure for manufacture previously defined.
  • Figure 1 shows a metal sheet as starting material
  • Figure 2 shows the metal sheet having corrugations executed in accordance with stage a) of the procedure
  • Figure 3 shows the process of bending the sheet in accordance with stage b) of the procedure.
  • Figure 4 shows the finished tube once stages c) and d) have been realised.
  • the procedure for manufacture of a tube 1 for conveyance of a fluid of a heat exchanger according to the present invention consists of the following stages: Initially, the starting material is a metal sheet 2 of approximately 60 mm (see Figure 1) .
  • corrugations 3 are proceeded to employing an embossing process along the metal sheet 2, avoiding attaining the longitudinal central zone 6 (see Figure 2) .
  • Such corrugations 3 may be embossed along the metal sheet 2 in its entire length, or avoiding the extreme ends 5.
  • the procedure of the present invention provides a reduction in costs of manufacture because, on the one hand, it is unnecessary to realise the prior operation of forming the sheet into a round tube, as occurred in the procedures known in the state of the art and, on the other hand, a totally continuous procedure is achieved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Geometry (AREA)
  • Manufacturing & Machinery (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Abstract

The present invention concerns a procedure for manufacture of a tube for conveyance of a fluid of a heat exchanger, such tube being of the type presenting a substantially rectangular cross-section, formed by two opposed walls of greater width and two rounded walls of lesser width, said procedure consists of realising the following stages: a) Commencing from a metal sheet (2) , realisation of a plurality of corrugations (3) by employing an embossing process; b) Realisation of the bending of sheet (2) by employing a process of embossing or forming; and c) Proceeding to weld the free edges (4) to close tube, considering the tolerances required.

Description

PROCEDURE FOR MANUFACTURE OF A TUBE FOR CONVEYANCE OF A FLUID OF A HEAT EXCHANGER, AND TUBE OBTAINED BY SUCH
PROCEDURE
The present invention relates to a procedure for manufacture of a tube for conveyance of a fluid of a heat exchanger. The invention also relates to the tube obtained by such procedure.
The invention is particularly applicable in exchangers having recirculation of exhaust gases from an engine (EGRC) .
BACKGROUND OF THE INVENTION
In some heat exchangers for cooling gases, for example those employed in systems of recirculation of exhaust gases towards the admission of an explosion engine
(systems denominated "Exhaust Gas Recirculation" or EGR) , the gases circulate through a bank of parallel tubes housed within a casing, during such circulation being cooled by heat exchange with a cooling fluid circulated within the housing, externally to the tubes for the passage of the gases.
Tubes for gas of rectangular section are known suitable for fitting in an optimised manner within the housing of an exchanger of rectangular section. Such tubes of rectangular section are manufactured from a circular tube and may also present corrugations having the objective of improving thermal performance of the heat exchanger. Generally such corrugations extend along the length of the tube, however without reaching the radius of the tube, i.e. the unformed circular ends thereof.
Currently the sole known method to enable the machining of the corrugations along the length of the tube in its totality is by a hydroforming process. The procedure for manufacture of this type of tube is as follows:
Initially, the starting material is a smooth tube of circular section obtained commencing from a bent and welded sheet. Subsequently, the tube is subjected to a hydroforming process including two stages: firstly forming of the tube is proceeded to it going from having a circular section to a substantially rectangular section, and subsequently the corrugations are realised. Finally, cutting off the ends of the tube and deburring is realised, if required.
Nevertheless this procedure for manufacture of such a tube presents the following disadvantages:
The cost of the procedure for manufacture is high due to the combination of diverse processes. On the one hand, the bent and welded tube employed as raw material already possesses added value; on the other hand, the hydroforming process operates at slow cycle rates, it not being a continuous process; it additionally requires high investment given that the machinery and tools are of considerable expense.
- The level of waste from the procedure for manufacture is high because during the hydroforming process it is necessary to have a zone of circular section at the ends of the tube wherein the cylinders of the hydroforming machine will be positioned to seal and inject the liquid under high pressure. As a result such zones of circular section must be eliminated to obtain the final shape of the tube.
DESCRIPTION ON THE PRESENT INVENTION
The objective of the procedure for manufacture of a tube for conveyance of a fluid of a heat exchanger of the present invention is to overcome the disadvantages presented by the procedures known in the art, providing a procedure for manufacture of the tubes having a lower cost .
The procedure for manufacture of a tube for conveyance of a fluid of a heat exchanger subject of the present invention, such tube being of the type presenting a substantially rectangular cross-section formed by two opposed walls of greater width and two rounded walls of lessor width, is characterised in that it consists of the realisation of the following stages:
a) Commencing from a metal sheet, realisation of a plurality of corrugations employing an embossing process;
b) Realisation of bending of the sheet employing a process of embossing or forming; and
c) Proceeding to weld the free edges to close the tube, considering the tolerances required.
In this manner a procedure for manufacture is achieved entailing the combination in one production line of three different technologies: corrugation embossing, bending and welding.
Optionally, following stage c) , cutting off the extreme ends of the tube is proceeded to, if required.
The principal advantages obtained through the procedure of the present invention are:
Reduction in costs of production because the process is continuous and, consequently, cycle rates achieved are higher than those achieved employing the process of hydroforming the tube. Reduction in waste material because employing this procedure it is unnecessary to dispose of a greater quantity of material, solely 1 mm on each side being sufficient for execution of the welding points, not as occurred in the case of hydroforming wherein at least 14 mm was required.
Higher production capacity achieved.
- Lower level of investment because the machinery and tools are more inexpensive than those employed for the tube realised by hydroforming.
Less industrial plant space is required.
Preferably, the corrugations are embossed in those zones of the metal sheet corresponding to the opposed walls of greater width of the tube once fabricated, attaining part of the rounded walls of lesser width.
According to one embodiment of the present invention, the corrugations are defined by a plurality of mutually parallel linear grooves transversely crossing said walls of greater width in a direction substantially diagonal to the axis of the tube.
Advantageously, such corrugations are embossed along the metal sheet, attaining the extreme ends or avoiding the extreme ends.
Preferably, such corrugations are distributed in a manner being mutually non-equidistant, and non¬ symmetrical with respect to the bend line, having the objective of improving the loss of load.
In such case the corrugations are distributed maintaining the same angle of inclination such that once the metal sheet has been bent, corrugations of one wall are positioned in a crossed manner with reference to those of the opposed wall, each pair of associated corrugations defining a projection substantially in the form of an X.
Preferably, the metal sheet is bent in half in accordance with a longitudinal central line.
According to another aspect the invention also relates to a tube for conveyance of a fluid of a heat exchanger of the type obtained employing the procedure for manufacture previously defined.
BRIEF DESCRIPTION OF THE DRAWINGS
Having the objective of facilitating the description of that previously stated, some drawings are attached wherein, schematically and solely as a non-limitative example, there is represented a practical case of embodiment of the procedure for manufacture of a tube for conveyance of a fluid of a heat exchanger of the present invention, wherein:
Figure 1 shows a metal sheet as starting material;
Figure 2 shows the metal sheet having corrugations executed in accordance with stage a) of the procedure;
Figure 3 shows the process of bending the sheet in accordance with stage b) of the procedure; and
Figure 4 shows the finished tube once stages c) and d) have been realised.
DESCRIPTION OF A PREFERRED EMBODIMENT
The procedure for manufacture of a tube 1 for conveyance of a fluid of a heat exchanger according to the present invention consists of the following stages: Initially, the starting material is a metal sheet 2 of approximately 60 mm (see Figure 1) .
Then, realisation of a plurality of corrugations 3 is proceeded to employing an embossing process along the metal sheet 2, avoiding attaining the longitudinal central zone 6 (see Figure 2) . Such corrugations 3 may be embossed along the metal sheet 2 in its entire length, or avoiding the extreme ends 5.
Subsequently, realisation of bending of sheet 2 in half is proceeded to in accordance with a longitudinal central line, employing a process of embossing or forming. In Figure 3 are shown different phases of bending of sheet 2 in order to enable closure of tube 1.
Finally, welding free edges 4 to close tube 1 is proceeded to considering the tolerances required and, if necessary, cutting off extreme ends 5 of tube 1 to achieve the tolerances (see Figure 4) .
Although in the attached figures a pattern of corrugations in the form of parallel lines orientated in a diagonal direction may be observed, it is possible to apply any other type of pattern appropriate for the characteristics of the exchanger and type of fluid to be cooled.
The procedure of the present invention provides a reduction in costs of manufacture because, on the one hand, it is unnecessary to realise the prior operation of forming the sheet into a round tube, as occurred in the procedures known in the state of the art and, on the other hand, a totally continuous procedure is achieved.

Claims

1. Procedure for manufacture of a tube (1) for conveyance of a fluid of a heat exchanger, such tube (1) being of the type presenting a substantially rectangular cross-section, formed by two opposed walls of greater width and two rounded walls of lesser width, characterised in that it consists of realising the following stages:
a) Commencing from a metal sheet (2), realisation of a plurality of corrugations (3) employing an embossing process;
b) Realisation of the bending of sheet (2) employing a process of embossing or forming; and
c) Proceeding to weld the free edges (4) to close tube (1), considering the tolerances required.
2. Procedure according to claim 1, characterised in that, subsequent to stage c) , cutting off the extreme ends (5) of tube (1) is proceeded to.
3. Procedure according to claim 1 or 2, characterised in that corrugations (3) are embossed in those areas of metal sheet (2) corresponding to the opposed walls of greater width of tube (1) once fabricated, attaining part of the rounded walls of lesser width.
4. Procedure according to claim 3, characterised in that corrugations (3) are defined by a plurality of mutually parallel grooves transversely crossing said walls of greater width in a direction substantially diagonal to the axis of the tube.
5. Procedure according to any of claims 1 to 4, characterised in that corrugations (3) are embossed along metal sheet (2) attaining extreme ends (5) .
6. Procedure according to any of claims 1 to 4, characterised in that corrugations (3) are embossed along metal sheet (2) avoiding extreme ends (5) .
7. Procedure according to any of the foregoing claims, characterised in that corrugations (3) are distributed in a manner being mutually non-equidistant, and non-symmetrical with respect to the bend line.
8. Procedure according to claim 7, characterised in that corrugations (3) are distributed maintaining the same angle of inclination such that once metal sheet
(2) has been bent, corrugations (3) of one wall are positioned in a crossed manner with reference to those of the opposed wall, each pair of associated corrugations defining a projection substantially in the form of an X.
9. Procedure according to any of the foregoing claims, characterised in that bending of metal sheet (2) is realised along the middle in accordance with a longitudinal central line.
10. Tube (1) for conveyance of a fluid of a heat exchanger of the type obtained employing the procedure for manufacture according to any of claims 1 to 9.
PCT/EP2007/053309 2006-04-05 2007-04-04 Procedure for manufacture of a tube for conveyance of a fluid of a heat exchanger, and tube obtained by such procedure WO2007113317A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP07727780A EP2001612A1 (en) 2006-04-05 2007-04-04 Procedure for manufacture of a tube for conveyance of a fluid of a heat exchanger, and tube obtained by such procedure
US12/295,898 US20100012306A1 (en) 2006-04-05 2007-04-04 Procedure For Manufacture Of A Tube For Conveyance Of A Fluid Of A Heat Exchanger, And Tube Obtained By Such Procedure

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES200600876A ES2288403B1 (en) 2006-04-05 2006-04-05 PROCEDURE FOR MANUFACTURING A TUBE FOR THE DRIVING OF A HEAT EXCHANGER FLUID, AND TUBE OBTAINED BY MEANS OF THIS PROCEDURE.
ESP200600876 2006-04-05

Publications (1)

Publication Number Publication Date
WO2007113317A1 true WO2007113317A1 (en) 2007-10-11

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Country Status (6)

Country Link
US (1) US20100012306A1 (en)
EP (1) EP2001612A1 (en)
KR (1) KR20080110604A (en)
CN (1) CN101437632A (en)
ES (1) ES2288403B1 (en)
WO (1) WO2007113317A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2354896A1 (en) * 2008-10-21 2011-03-21 Valeo Termico, S.A. Method of manufacturing a tube serving to convey a fluid of a heat exchanger, and tube obtained by means of said method
WO2012084326A1 (en) * 2010-12-23 2012-06-28 Robert Bosch Gmbh Tubular pressure accumulator, in particular for mixture compressing spark-ignition internal combustion engines

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103785705A (en) * 2012-10-29 2014-05-14 苏州建莱机械工程技术有限公司 High-frequency welding formation technology of rectangular gas collecting tubes
PL230056B1 (en) * 2016-10-13 2018-09-28 Aic Spolka Akcyjna Furnace flue of the fired heat exchanger

Citations (6)

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Publication number Priority date Publication date Assignee Title
FR489717A (en) * 1918-04-13 1919-03-05 Itzko Tcherniakofsky Further development of flat tube radiators
US2017201A (en) * 1931-11-27 1935-10-15 Modine Mfg Co Condenser tube
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US20100012306A1 (en) 2010-01-21
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EP2001612A1 (en) 2008-12-17
ES2288403B1 (en) 2008-11-16
CN101437632A (en) 2009-05-20

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