EP2371466B1 - Procédé de fabrication d'une pièce métallique - Google Patents

Procédé de fabrication d'une pièce métallique Download PDF

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Publication number
EP2371466B1
EP2371466B1 EP20110160659 EP11160659A EP2371466B1 EP 2371466 B1 EP2371466 B1 EP 2371466B1 EP 20110160659 EP20110160659 EP 20110160659 EP 11160659 A EP11160659 A EP 11160659A EP 2371466 B1 EP2371466 B1 EP 2371466B1
Authority
EP
European Patent Office
Prior art keywords
predetermined breaking
metal part
breaking point
regions
steps
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.)
Active
Application number
EP20110160659
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German (de)
English (en)
Other versions
EP2371466A1 (fr
Inventor
Claus Augenstein
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.)
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Publication date
Application filed by Behr GmbH and Co KG filed Critical Behr GmbH and Co KG
Publication of EP2371466A1 publication Critical patent/EP2371466A1/fr
Application granted granted Critical
Publication of EP2371466B1 publication Critical patent/EP2371466B1/fr
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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
    • 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

Definitions

  • the present invention relates to a method for producing a metal part, in particular floor for a heat exchanger, according to the preamble of claim 1 and a heat exchanger with such a metal part.
  • the method will be described in relation to a heat exchanger used in automobiles, for example, in air conditioning systems of a motor vehicle and the like. However, the method can also be applied to other heat exchangers or intercoolers.
  • the trays for heat exchangers have openings through which the flow tubes can be inserted.
  • openings which are also referred to as passages
  • several production methods are known from the prior art.
  • these passages can be produced by means of punching.
  • EP 0776711 discloses a method of making tube sheets of heat transfer.
  • the invention has for its object to provide a simplified manufacturing method for creating a metal part of the type mentioned, which also has increased strength values.
  • the method for producing a metal part, in particular bottom of a heat exchanger, with a plurality of openings for receiving flow tubes essentially comprises the following method steps: feeding and cutting to length a strand of material from a metal; partially reshaping the material piece obtained and creating at least one predetermined breaking point in the piece of material; and forming at least one opening with edge region for receiving a flow-through pipe in the region of the predetermined breaking point by at least regional tearing and deformation in the region of the predetermined breaking point.
  • a slot of, for example, at least 2 mm width provides, one wins by the inventive method material that can be used to increase the strength of the metal part and in particular the passages.
  • the passages or the edge regions can be made higher by the material obtained, since more material is available for the formation of the passages or the edge regions.
  • tearing is meant a process in which the opening is achieved at least temporarily by pulling or tearing.
  • breaking point is understood to mean the area which defines the later opening after the breaking process has been applied.
  • the material strand may be a band or sheet or a profile, it may be present as a roll material or in any other way as an endless or quasi-endless supply of material.
  • the predetermined breaking point can be produced by means of material displacement by an embossing process.
  • the embossing can account for a majority of the material thickness of the piece of material.
  • the embossing runs on at least one side of the main plane of the piece of material. It is also conceivable that both sides of the piece of material are provided with an opposite and substantially the same or similar embossing.
  • the embossments are designed so that they do not fully penetrate the piece of material, which is why no material waste. In any case, the embossments are to be designed so that a simple pulling or tearing of the opening is made possible.
  • the An josgevorgang can be done without cutting by means of a punch with an associated die.
  • the material is thus essentially displaced.
  • Other methods and devices for producing a stamping are conceivable.
  • the predetermined breaking point can have regions with an at least slightly lower material thickness than the rest of the material piece.
  • the predetermined breaking point groove-like with bevelled edges in the piece of material without completely penetrate the piece of material.
  • the steps according to method step b. Namely, the regional forming and creating the predetermined breaking point, substantially simultaneously or in a single operation.
  • it may be provided in the reshaping step to angle or bead over portions of the piece of material (for example side walls).
  • the work steps can be performed by a tool that masters both work steps.
  • the steps according to method step c. can be carried out essentially simultaneously or in one operation.
  • it may be provided in the forming step to form the edge regions of the openings.
  • the work steps can be performed by a tool that masters both work steps.
  • the edge region of the openings can be produced by a non-cutting shaping process, wherein the edge region can protrude at least partially from the main plane of the material piece.
  • the chipless forming process may include a bending or deep drawing process.
  • the classic and preferred method is thermoforming with rigid tools.
  • For deep drawing, for example, presses are used.
  • the pressing force required for forming is conducted by means of a punch on the bottom of the metal part to be produced.
  • a hold-down can avoid wrinkling by upsetting.
  • the stamp the piece of material is pressed for example by a die.
  • the edge region may protrude substantially perpendicularly from the main plane of the piece of material. This means that the flow tubes are pushed through the openings, and the edge areas in the same direction in which the flow tubes are pushed through the openings, protrude from the main plane.
  • edge regions can also run obliquely with respect to the main plane and form, for example, chamfers which facilitate the assembly, in particular the connection with the flow tubes.
  • the opening with the edge region may have an elongated shape.
  • the opening may have a predetermined length and compared to this length a significantly reduced width. This is particularly advantageous if the flow tubes are flat tubes whose ends likewise have an elongated cross section.
  • the new process is characterized by a reduction in the work steps compared to known production methods and also offers the possibility to use more cost-effective tools.
  • the invention is directed to a method for producing a heat exchanger, wherein in a method step, a metal part is produced according to one of the preceding method steps and then the flow tubes at least partially with the metal part by means of a connecting means (eg, solder) or connection method, such as a soldering or welding process, be connected.
  • a connecting means eg, solder
  • connection method such as a soldering or welding process
  • Fig. 1 shows a schematic representation of individual subsequent process steps for the creation of a metal part 1, here ground for a heat exchanger, wherein the same components carry identical reference numerals, and wherein the method (in spite of a mirror image of two metal parts) is described only with reference to a metal part 1,
  • a first method step 1 ' the method initially proceeds from a suspended piece of material 2, which is essentially plate-shaped, wherein the cutting-off process can include the provision of a notch 2'.
  • the piece of material 2 is formed by partially reshaping the piece of material 2, forming the side walls 3 and 4, and simultaneously creating a plurality of predetermined breaking points 5 according to method step 1".
  • the predetermined breaking points 5 are have been produced by means of a An josgevorgangs, wherein the predetermined breaking points 5 are formed so that they do not completely reach through the piece of material 2 in the main plane H, and thus no material waste arises.
  • the predetermined breaking points 5 can be produced by a stamping or stamping process with at least slight material displacement.
  • a next step 1 "' shows the piece of material 2 after a tearing and forming process to form the now finished passages (openings) 6 with edge region 7.
  • the edge regions 7 extend perpendicularly from the main plane H of the piece of material 2 out and serve the attachment or Supporting the flow tubes which can be introduced into the passages 6.
  • the passages 6 can be formed by means of a forming process, which may include a deep-drawing operation, for example by means of a hydraulic press, wherein the deep-drawing process can involve the simultaneous impressing of further phases 8. Using a simultaneous example Breaking process thus the opening or, the passage 6 is formed.
  • the illustration under 1 does not show a new process step but serves to illustrate the gain increase D. obtained by material saving.
  • Fig. 2 shows the schematic partial view of a metal part 9, in particular bottom for a heat exchanger, with an embossment provided on both sides.
  • the embossments for forming a predetermined breaking point 10 extend on both sides of the main plane H 'of the metal part 9.
  • the two embossments are formed so that between the embossments an unembossed material web 11 stops, wherein the material web 11 is torn in a later tearing process, whereby the predetermined breaking point 10 forms the later opening.
  • the embossings have oblique or phase-like Edge regions 12, 13 which open in circular end regions 14, 15.
  • Fig. 3 shows the schematic partial view of a metal part 16, in particular bottom for a heat exchanger, with an embossment provided on one side.
  • the one-sided embossing forms a predetermined breaking point 17, which does not fully penetrate the metal part 16 in the main plane H "
  • the predetermined breaking point 17 is designed so that the material web 18 stops, which is torn in a later tearing process, whereby the predetermined breaking point 17 is the later Opening forms.
  • Fig. 4 shows the schematic side view of a finished metal part 1 according to process step 1 "in Fig. 1 ,
  • the representation of the metal part 1 shown here is intended to illustrate the possible increase of the passage 6, wherein the area D1 shows the passage height achievable by punching, while the area D2 shows the passage height achievable by a tearing process.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Claims (10)

  1. Procédé de fabrication d'une pièce métallique (1, 9, 16), en particulier fond d'un échangeur de chaleur, comportant plusieurs ouverture (6) pour le logement de tubes d'écoulement, comprenant les étapes qui suivent consistant :
    a) à fournir et à découper à la longueur une barre de matière se composant d'un métal,
    caractérisé en ce que sont exécutées en outre les étapes de procécé consistant :
    b) à façonner partiellement la pièce de manière obtenue (2) est à réaliser au moins un point destiné à là rupture (5, 10, 17) dans la pièce de matière (2),
    c) à former au moins une ouverture (6) comportant une zone de bordure (7) servant au logement d'un tube d'écoulement dans la zone du point destiné à la rupture (5, 10, 17), en procédant par au moins une rupture et un façonnage réalisés de façon partielle dans la zone du point destiné à la rupture.
  2. Procédé selon la revendication 1, caractérisé en ce que le point, destiné à la rupture (5, 10, 17) est réalisé par une opération de matriçage effectuée par déplacement de matière.
  3. Procédé selon au moins l'une ou l'autre des revendications précédentes, caractérisé en ce que l'opération de matriçage intervient sans enlèvement de matière, au moyen d'un poinçon comportant une matrice correspondante.
  4. Procédé salon au moins l'une quelconque des revendications précédentes, caractérisé en ce que le point destiné à la rupture (5, 10, 17) présente des zones ayant une épaisseur de matière au moins de peu inférieure à colle du reste de la pièce de ratière (2).
  5. Procédé salon au moins l'une quelconque des revendications précédentes, caractérisé en ce que les opérations réalisées au cours de l'étape b) du procécé interviennent pratiquement en même temps.
  6. Procédé selon au moins l'une quelconque des revendications précédentes, caractérisé en ce que les opérations réalisées au cours de l'étape c) du procédé interviennent pratiquement en même temps.
  7. Procédé salon au moins l'une quelconque des revendications précédentes, caractérisé en ce que la zone de bordure (7) des ouvertures (6) est réalisée par un procécé de formage sans enlèvement de matière, où la zone de bordure (7) dépassé au moins partiellement du plan principal (H, H', H") de la pièce de matière C
  8. Procédé selon au moins l'une quelconque des revendications précédentes, caractérisé en ce que la zone de bordure (7) dépasse du plan principal (H, H', H") de la pièce de matière (2), pratiquement de façon verticale.
  9. Procédé selon au moins l'une quelconque des revendications précédentes, caractérisé en ce que l'ouverture (6) présente une forme étirée en longueur.
  10. Procédé de fabrication d'un échangeur de chaleur, caractérisé en ce qu'une pièce métallique (1, 9, 16) est fabriquée au cours d'une étape de procédé selon l'une quelconque des revendications précédentes, est, ensuite, les tubes d'écoulement sont raccordés au moins partiellement à la pièce métallique (1, 9, 16), à l'aide d'un moyen d'assemblage.
EP20110160659 2010-04-01 2011-03-31 Procédé de fabrication d'une pièce métallique Active EP2371466B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE201010003631 DE102010003631A1 (de) 2010-04-01 2010-04-01 Verfahren zur Herstellung eines Metallteils

Publications (2)

Publication Number Publication Date
EP2371466A1 EP2371466A1 (fr) 2011-10-05
EP2371466B1 true EP2371466B1 (fr) 2012-10-24

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP20110160659 Active EP2371466B1 (fr) 2010-04-01 2011-03-31 Procédé de fabrication d'une pièce métallique

Country Status (2)

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EP (1) EP2371466B1 (fr)
DE (1) DE102010003631A1 (fr)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4150556A (en) * 1978-02-27 1979-04-24 Mccord Corporation Radiator tank headsheet and method
DD211225A3 (de) * 1982-05-17 1984-07-04 Umform & Plastverarb Fz Boden fuer den tank eines rohrwaermetauschers und werkzeug zu dessen herstellung
US5243842A (en) * 1988-07-14 1993-09-14 Showa Aluminum Kabushiki Kaisha Method of making a brazeable metal pipe having tube-insertion apertures formed with guide lugs
JPH07305990A (ja) * 1994-05-16 1995-11-21 Sanden Corp 多管式熱交換器
JPH08254399A (ja) * 1995-01-19 1996-10-01 Zexel Corp 熱交換器
JP3289584B2 (ja) * 1995-11-30 2002-06-10 株式会社デンソー 板材のプレス加工方法およびプレス加工装置
JP3822958B2 (ja) * 1997-08-04 2006-09-20 サンデン株式会社 熱交換器の製造方法
JP3375602B2 (ja) * 2000-07-13 2003-02-10 日高精機株式会社 熱交換器用フィンの製造方法および熱交換器用フィン製造用金型
ATE499163T1 (de) * 2004-12-03 2011-03-15 Behr Gmbh & Co Kg Verfahren zur herstellung eines wärmetauschers
DE102009022983A1 (de) * 2008-06-10 2009-12-17 Behr Gmbh & Co. Kg Wärmetauscher

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Publication number Publication date
EP2371466A1 (fr) 2011-10-05
DE102010003631A1 (de) 2011-10-06

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