EP1952904A2 - Procédé de déformation et dispositif de déformation pour la formation d'un pliage dans un tube d'échangeur de chaleur - Google Patents

Procédé de déformation et dispositif de déformation pour la formation d'un pliage dans un tube d'échangeur de chaleur Download PDF

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Publication number
EP1952904A2
EP1952904A2 EP08000606A EP08000606A EP1952904A2 EP 1952904 A2 EP1952904 A2 EP 1952904A2 EP 08000606 A EP08000606 A EP 08000606A EP 08000606 A EP08000606 A EP 08000606A EP 1952904 A2 EP1952904 A2 EP 1952904A2
Authority
EP
European Patent Office
Prior art keywords
forming
eckfalzes
eckfalz
heat exchanger
bent
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.)
Granted
Application number
EP08000606A
Other languages
German (de)
English (en)
Other versions
EP1952904B1 (fr
EP1952904A3 (fr
Inventor
Jürgen Hägele
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.)
Mahle Behr GmbH and Co KG
Original Assignee
Behr GmbH and Co KG
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 Behr GmbH and Co KG filed Critical Behr GmbH and Co KG
Publication of EP1952904A2 publication Critical patent/EP1952904A2/fr
Publication of EP1952904A3 publication Critical patent/EP1952904A3/fr
Application granted granted Critical
Publication of EP1952904B1 publication Critical patent/EP1952904B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • B21D19/00—Flanging or other edge treatment, e.g. of tubes
    • B21D19/02—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge
    • B21D19/04—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge shaped as rollers
    • B21D19/043—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge shaped as rollers for flanging edges of plates
    • 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
    • B21C37/14—Making tubes from double flat material
    • 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
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • F28F1/022—Tubular elements of cross-section which is non-circular with multiple channels

Definitions

  • the invention relates to a forming method for producing a Eckfalzes for heat exchanger tubes with at least two Rohrkammem, wherein the Eckfalz is bent and compressed by means of rollers.
  • the invention further relates to a forming device with an upper or lower roller, which has an annular groove with a groove bottom for forming the Eckfalzes, emanating from the two groove edges.
  • the invention further relates to a heat exchanger tube with a Eckfalz.
  • the object of the invention is to optimize the geometry of heat exchanger tubes in the region of the Eckfalzes, in particular with regard to the solderability.
  • the object is in a forming process for producing a Eckfalzes for heat exchanger tubes with at least two Rohrkammem, wherein the Eckfalz is bent and compressed by means of rollers, achieved in that the Eckfalz is bent and compressed in at least three, especially five, stages.
  • the forming process according to the invention are Contrary to the trend to reduce tooling costs, consciously accepting higher tooling costs. As a result, the forming result can be unexpectedly improved significantly.
  • the tool wear can be reduced because the abrasion is reduced by the at least three forming stages.
  • the Schmierrnittelmony neighbor can be limited, whereby the effort in post-processing, for example, when degreasing the surfaces to be soldered, is reduced.
  • a preferred embodiment of the forming process is characterized in that the Eckfalz is bent in at least two, in particular three, pure bending steps and compressed in at least one, in particular two, pure compression stages.
  • the seam height is kept constant.
  • the bending angle of the Eckfalzes is not changed.
  • a further preferred embodiment of the forming process is characterized in that the corner fold is in each case both bent and compressed in several bending and compression stages. In the combined bending and compression stages, the rebate height during bending is reduced.
  • a further preferred embodiment of the forming process is characterized in that in at least one forming stage, in particular a pure upsetting step, a bevel is impressed on the free end of the Eckfalzes. By embossing the bevel, the removal of the Eckfalzes is simplified.
  • a forming device for producing a Eckfalzes for heat exchanger tubes with at least two Rohrkammem wherein the Eckfalz is bent and compressed by means of rollers, with an upper or lower roller, which has an annular groove with a groove bottom for forming the Eckfalzes, emanating from the two groove flanks
  • the above-stated object is achieved in that between the Eckfalz and one of the groove flanks, viewed in cross section through the Eckfalz, a substantially wedge-shaped gap is provided, which widens, based on the upper roller to the outside.
  • the intermediate space facilitates the removal of the Eckfalzes.
  • a further preferred embodiment of the forming device is characterized in that the intermediate space is provided on the inside of the Eckfalzes. This allows a good support of Eckfalzes on the outside.
  • Another preferred embodiment of the forming device is characterized in that the groove bottom is inclined to the intermediate space. Thereby, an undesired buckling of the Eckfalzes be prevented in the gap.
  • the invention also relates to a heat exchanger tube having one with a Eckfalz, which has been prepared by a previously described forming process and in particular with a previously described forming device.
  • a sheet metal strip 1 has the shape of a rectangular plate 2, from which a Eckfalz 4 is bent at right angles.
  • the sheet metal strip 1 has a thickness S.
  • the corner fold 4 is bent by an angle of about 30 degrees.
  • the length of Eckfalzes 4 is designated x1.
  • the corner fold 4 is bent over approximately 40 degrees.
  • the length of Eckfalzes 4 is designated x2.
  • the corner fold 4 is bent over by a further 20 degrees.
  • the length of Eckfalzes 4 is denoted by x3.
  • the corner fold 4 is arranged at an angle of 90 degrees to the rectangular plate 2.
  • the width of the rectangular plate 2 is denoted by L3.
  • the corner fold 4 is compressed and, if necessary, the width of the rectangular plate 2 is reduced.
  • the free end of Eckfalzes 4 is bevelled ⁇ at an angle.
  • the length of Eckfalzes 4 is denoted by x4.
  • the width of the rectangular plate 2 is denoted by L4.
  • the corner fold 4 and optionally the width of the rectangular plate 2 are further reduced.
  • the length of Eckfalzes 4 is designated x5.
  • the width of the rectangular plate 2 is indicated by L5.
  • the free end of Eckfalzes 4 is further bevelled, as indicated by an angle ⁇ .
  • the leg height x1 to x3 of the Eckfalzes 4 is preferably kept constant in order to form a sharp corner Falzecke.
  • the leg height can also already be reduced in the forming stages 1 to 3 as a function of the ratio of the finished seam height x5 to the pipe wall thickness S from stage to stage.
  • the fold is calibrated at least once. During the calibration either the width L3 to L5 is reduced and the seam height is kept constant, or the width L3 to L5 is kept constant and the seam height x3 to x5 is reduced. It is also possible to reduce the folding height x and the width L together.
  • the optimum geometry depends on the processing properties of the pipe strip 1 and the ratio of the pipe wall thickness to the finished seam height.
  • a bevel is impressed on the strip edge at the free end of the corner fold 4.
  • the embossing of the slope allows a top roller contour, in which the rebate width are recessed and therefore can be better demolded.
  • the slope is inclined at an angle ⁇ , ⁇ so that it presses the fold on the vertical roller wall, on which the fold 4 can be supported.
  • ⁇ angle
  • ⁇ angle
  • FIG. 2 is a section of a tube 10 shown in cross section.
  • the tube 10 is a flat tube of a heat exchanger.
  • the tube 10 comprises a tube wall piece 11 which has substantially the shape of a rectangular plate.
  • the tube 10 comprises two further tube wall pieces 12 and 13, which are arranged parallel to the tube wall piece 11.
  • a Eckfalz 14, 15 is bent at right angles.
  • the free ends of the Eckfalze 14 and 15 are soldered to the pipe wall piece 11.
  • two tube chambers 16 and 17 are formed in the tube 10.
  • the pipe wall thickness is denoted by S.
  • the pipe wall thickness in the region of the bend of the Eckfalze is designated by x.
  • the outer radius in the region of the bend of the Eckfalzes 14, 15 is denoted by R.
  • the finished leg height of Eckfalzes 14, 15 is designated by xF.
  • the thickness x in the region of the bend is greater than or equal to the pipe wall thickness S.
  • the radius R according to a further aspect of the invention is smaller than the pipe wall thickness S.
  • the tube wall pieces 12 and 13 are internally provided with a continuous cladding layer 18, 19.
  • the tube wall piece 11 is also provided with a plating layer 20.
  • the plating layers 18 to 20 are integrally connected to each other.
  • the Rohrwandkammem 16, 17 are provided inside with a complete Schutzplatt réelle. This increases the corrosion resistance.
  • solder plating is provided instead of or in addition to protective plating.
  • FIG. 4 it can be seen that the free ends 24 and 25 of the Eckfalze 14 and 15 are each beveled at an angle ⁇ . Characterized a wedge-shaped gap is formed between the free ends 24 and 25 and the pipe wall piece 11, which widens to the associated pipe wall chamber 16, 17 out.
  • the Eckfalze 14 and 15 are soldered together on their outer side. Furthermore, the free ends 24 and 25 of the Eckfalze 14 and 15 are soldered to the pipe wall piece 11.
  • the free ends 28 and 29 of the Eckfalze 14 and 15 may be chamfered in the opposite direction, as indicated by an angle ⁇ .
  • ⁇ At the in FIG. 5 illustrated embodiment results from the bevels of the free ends 28 and 29 is a substantially triangular space between the pipe wall piece 11 and the free ends 28, 29 of the corner seams 14, 15. This gap is filled with solder. Due to the beveled or bevelled fold ends, as in the FIGS. 4 and 5 is shown, the wettability of the Falzthetic with solder improved.
  • FIG. 6 is a similar representation as in FIG. 4 shown.
  • the folding ends are bevelled by an angle ⁇ .
  • ⁇ At 32 it is indicated that at the Falzkalibri für a burr may arise. However, this burr does not adversely affect the quality of the heat exchanger tube 10.
  • FIG. 7 the heat exchanger tube 10 is shown completely in cross section.
  • the pipe wall pieces 12 and 13 are integrally connected to the pipe wall piece 11.
  • FIG. 8 a heat exchanger tube 40 is shown in cross section having four Rohrkammem.
  • FIG. 9 a section of an upper roller 41 is shown in section, which is rotatable about a rotation axis 42. Furthermore, a lower roller 43 is shown in section, which is rotatable about a rotation axis 44. Between the upper roller 41 and the lower roller 43, a sheet metal strip 1 is arranged, which has the shape of a rectangular plate 2, from which a Eckfalz 4 is bent. The length of Eckfalzes 4 is designated x1.
  • FIG. 9 corresponds to the forming stage 1 in FIG. 1 ,
  • FIG. 10 corresponds to the forming stage 2 in FIG. 1 ,
  • the metal strip 1 is arranged between an upper roller 45 and a lower roller 46.
  • FIG. 11 corresponds to the forming step 3 in FIG. 1 ,
  • the metal strip 1 is arranged between a further upper roller 47 and a further lower roller 48.
  • FIG. 12 a calibration step is indicated.
  • the metal strip 1 is arranged between an upper roller 51, which is rotatable about a rotation axis 52, and a lower roller 53, which is rotatable about a rotation axis 54.
  • the upper roller 51 is provided with an annular groove in which the Eckfalz 4 is arranged.
  • the corner fold 4 rests with its outer side against the upper roller 51.
  • a wedge-shaped gap 57 is provided which widens to the rectangular plate 2 out.
  • FIG. 13 is the metal strip 1 between an upper roller 61 which is rotatable about a rotation axis 62, and a lower roller 63 which is rotatable about a rotation axis 64.
  • the annular groove in which the Eckfalz 4 is arranged wider than in the previous embodiment. This creates between the inside of Eckfalzes 4 and the upper roller 61, a gap 67 which is larger than in the previous embodiment. This has the consequence that at the free end of Eckfalzes 4 burr fi8 can arise. However, this ridge 68 does not affect the solder joint between the corner fold 4 and the associated pipe wall piece (11 in FIG. 2 ).
  • FIG. 14 is the 131echstMail 1 between an upper roller 71 which is rotatable about a rotation axis 72, and a lower roller 73 which is rotatable about a rotation axis 74.
  • the free end of Eckfalzes 4 is angled in the opposite direction by an angle ⁇ as in the previous embodiments.
  • the annular groove, in which the Eckfalz 4 is arranged formed so that the Eckfalz 4 rests with its inner side on the upper roller 71.
  • a wedge-shaped gap 77 is formed, which widens to the lower roller 73 out.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Coating With Molten Metal (AREA)
  • Press Drives And Press Lines (AREA)
EP20080000606 2007-02-05 2008-01-15 Procédé de déformation pour la formation d'un pliage dans un tube d'échangeur de chaleur Not-in-force EP1952904B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007005590A DE102007005590A1 (de) 2007-02-05 2007-02-05 Umformverfahren und Umformvorrichtung

Publications (3)

Publication Number Publication Date
EP1952904A2 true EP1952904A2 (fr) 2008-08-06
EP1952904A3 EP1952904A3 (fr) 2009-02-18
EP1952904B1 EP1952904B1 (fr) 2012-08-29

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ID=39345116

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Application Number Title Priority Date Filing Date
EP20080000606 Not-in-force EP1952904B1 (fr) 2007-02-05 2008-01-15 Procédé de déformation pour la formation d'un pliage dans un tube d'échangeur de chaleur

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EP (1) EP1952904B1 (fr)
DE (1) DE102007005590A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106180334A (zh) * 2016-08-31 2016-12-07 浙江三永机械有限公司 一种扶梯围裙板自动滚边机
CN106424263A (zh) * 2015-04-09 2017-02-22 浙江三永机械有限公司 改进的手扶电梯围裙板用滚边机
DE102016200152A1 (de) * 2016-01-08 2017-07-13 Mahle International Gmbh Flachrohr für einen Wärmeübertrager

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106424264B (zh) * 2016-10-13 2018-12-04 山东鸿民金属成型科技股份有限公司 一种生产叠边型材的设计工艺

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0829316A2 (fr) 1996-09-16 1998-03-18 Denso Corporation Méthode et dispositif de profilage par roulage des tubes plats

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2655181A (en) * 1949-09-14 1953-10-13 Mccord Corp Tube construction
JPS5671520A (en) * 1979-11-13 1981-06-15 Nissan Motor Co Ltd Production of tube structural body
FR2787180B1 (fr) * 1998-12-11 2001-03-02 Valeo Thermique Moteur Sa Tube plie pour echangeur de chaleur et procede pour sa conformation
DE60019940T2 (de) * 1999-09-08 2006-02-16 Zexel Valeo Climate Control Corp. Wärmetauscherrohr und verfahren zur herstellung des wärmetauscherrohrs
FR2823840B1 (fr) * 2001-04-20 2004-01-23 Valeo Thermique Moteur Sa Tube plie pour echangeur de chaleur et procede pour sa conformation
US6615488B2 (en) * 2002-02-04 2003-09-09 Delphi Technologies, Inc. Method of forming heat exchanger tube
FR2836546B1 (fr) * 2002-02-22 2004-05-07 Valeo Thermique Moteur Sa Tube plie poue echangeur de chaleur
JP3941714B2 (ja) * 2003-03-17 2007-07-04 株式会社デンソー チューブ、チューブの製造方法及びチューブの製造装置
DE102004040257A1 (de) * 2004-08-18 2005-12-15 Daimlerchrysler Ag Vorrichtung zum Walzprofilieren von Kaltprofilen

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0829316A2 (fr) 1996-09-16 1998-03-18 Denso Corporation Méthode et dispositif de profilage par roulage des tubes plats

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106424263A (zh) * 2015-04-09 2017-02-22 浙江三永机械有限公司 改进的手扶电梯围裙板用滚边机
DE102016200152A1 (de) * 2016-01-08 2017-07-13 Mahle International Gmbh Flachrohr für einen Wärmeübertrager
CN106180334A (zh) * 2016-08-31 2016-12-07 浙江三永机械有限公司 一种扶梯围裙板自动滚边机
CN106180334B (zh) * 2016-08-31 2017-11-03 浙江三永机械有限公司 一种扶梯围裙板自动滚边机

Also Published As

Publication number Publication date
EP1952904B1 (fr) 2012-08-29
EP1952904A3 (fr) 2009-02-18
DE102007005590A1 (de) 2008-08-07

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