EP2260221A1 - Soufflet métallique multicouche et son procédé de production - Google Patents

Soufflet métallique multicouche et son procédé de production

Info

Publication number
EP2260221A1
EP2260221A1 EP09729581A EP09729581A EP2260221A1 EP 2260221 A1 EP2260221 A1 EP 2260221A1 EP 09729581 A EP09729581 A EP 09729581A EP 09729581 A EP09729581 A EP 09729581A EP 2260221 A1 EP2260221 A1 EP 2260221A1
Authority
EP
European Patent Office
Prior art keywords
layer
bellows
metal
intermediate layer
multilayer
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.)
Withdrawn
Application number
EP09729581A
Other languages
German (de)
English (en)
Inventor
Andreas KÄMPFE
Hans-Jürgen Leidig
Michael Pluschke
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.)
Witzenmann GmbH
Original Assignee
Witzenmann GmbH
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 Witzenmann GmbH filed Critical Witzenmann GmbH
Publication of EP2260221A1 publication Critical patent/EP2260221A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J3/00—Diaphragms; Bellows; Bellows pistons
    • F16J3/04—Bellows
    • F16J3/047—Metallic bellows
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
    • F01N13/1811—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body with means permitting relative movement, e.g. compensation of thermal expansion or vibration
    • F01N13/1816—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body with means permitting relative movement, e.g. compensation of thermal expansion or vibration the pipe sections being joined together by flexible tubular elements only, e.g. using bellows or strip-wound pipes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L51/00—Expansion-compensation arrangements for pipe-lines
    • F16L51/02—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube
    • F16L51/025—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube with several corrugations

Definitions

  • the present invention relates to a multilayer metal bellows according to the term of claim 1, in particular as a flexible conduit member for automotive applications, with at least two metal layers, namely an inner layer and an outer layer surrounding the inner layer.
  • the present invention relates to various methods for producing a multilayer metal bellows.
  • the invention has for its object to prevent diffusion bonds between the layers of multilayer bellows when exposed to said high temperatures to ensure a constancy of the functional properties of the bellows and counteract failures. Furthermore, the considerable strength and service life potential of hardenable materials should also be developed for multilayer bellows.
  • the invention has for its object to provide a number of methods for producing a bellows according to the invention.
  • the invention solves the problems by means of a multilayer metal bellows with the features of patent claim 1 and by means of a method for producing a multilayer bellows with the features of claim 9, claim 10 or claim 11.
  • a multilayer metal bellows in particular as a flexible conduit element for motor vehicle applications, with at least two metal layers, namely an inner layer and an outer layer surrounding the inner layer, characterized in that between the inner layer and the outer layer at least in sections of the bellows at least one intermediate layer in shape a diffusion barrier is arranged for the inner layer material and / or for the outer layer material.
  • a first method according to the invention for producing a multilayer bellows is characterized in that a metal tube which is one of the talllagen of the bellows is to form, before forming at least on its passing with the other metal layer in contact lateral surface is provided with a coating forming the intermediate layer.
  • Another inventive method for producing a multilayer bellows is characterized in that first a first metal tube is formed to the outer layer of the bellows, then that the outer layer is provided on the inside with an intermediate layer forming coating and then that a second metal tube within the outer layer to the Inner layer is formed.
  • the second metal tube may also have been suitably coated prior to forming.
  • a further method according to the invention for producing a multilayer bellows is characterized in that first the outer layer and the inner layer of the bellows are formed and subsequently the intermediate layer between the outer layer and the inner layer is produced.
  • the intermediate layer is formed as an oxide layer.
  • the intermediate layer in this context may be a Cr oxide layer.
  • the intermediate layer is formed as a further metal bellows, however is formed from a relative to the other metal layers oxidation-resistant material.
  • the intermediate layer may also be formed as a tungsten or titanium / tungsten layer, which is applied in particular by sputtering on the inner layer and / or the outer layer of the bellows.
  • the intermediate layer can also be formed from in particular galvanically deposited chromium or nickel.
  • the intermediate layer is formed from at least one in particular chemically deposited nickel alloy.
  • nickel alloys in this context in particular nickel-phosphorus, nickel-phosphorus-tungsten or iron-nickel-phosphorus alloys in question, especially in nanocrystalline form, that is with a particle size in the nanometer range.
  • the intermediate layer may also be formed as an intermetallic iron-zinc phase, which is obtained in particular by hot-dip galvanizing.
  • the intermediate layer is formed as a carbonitride, nitride or boride boundary layer.
  • Preferred embodiments in this context include iron carbonitride, iron nitride or iron boride edge straighteners, which are produced in particular by nitriding or boriding in a salt bath.
  • the middle layer may consist of a material which is more resistant to oxidation, for example material 2.4856, compared to material 1.4571 for the outer and inner layer.
  • materials curable for the outer layer and / or for the inner layer of the bellows eg 2.4668, 2.4667, 1.4564 or 1.4568) are used in order to achieve the spring behavior of the bellows To influence Balgs in a targeted way.
  • the present invention is not limited to multilayer bellows having only one inner and one outer layer and a single intermediate layer, but is generally expandable to multilayer metal bellows having any number of metal layers and a corresponding number of intermediate layers.
  • the intermediate layers can each be formed on only one of two metallic surfaces in contact, or they can be formed on both metal surfaces in contact or even as an independent intermediate layer, as described above by way of example.
  • FIG. 1 shows a longitudinal section through a multilayer metal bellows with a
  • FIG. 1 shows a multilayer metal bellows 1, as it is used in particular as a flexible conduit member for automotive applications, for example as a decoupling element in exhaust systems, as an expansion body in the manifold area or the like.
  • the multilayer bellows 1 has at least two metallic bellows layers, namely an inner layer 2 and an outer layer 3, the outer layer 3 surrounding the inner layer 2.
  • the multilayer metal bellows 1 according to the present invention is not limited to the presence of exactly one inner layer 2 and one outer layer 3; rather, the bellows can also be configured as a much-walled bellows and correspondingly have more metallic bellows layers, which in the present case is not explicitly shown for reasons of clarity.
  • an intermediate layer 4 in the form of a diffusion barrier is arranged or formed, which separates the material of the inner layer 2 and the material of the outer layer 3 diffusion-preventing each other.
  • the intermediate layer 4 is formed over its entire surface between the inner layer 2 and the outer layer 3 of the multilayer bellows 1, without the present invention being restricted thereto. Rather, alternatively, it can also be provided that the intermediate layer 4 is provided only in Sectionabschnit- th of the bellows 1 between the inner layer 2 and the outer layer 3.
  • the inner layer 2 and the outer layer 3 are usually metal bellows layers of the same material, in particular steel, preferably with the same material thickness d, where d may be 0.3 mm, for example.
  • the intermediate layer 4 serves - as already stated - as a diffusion barrier and is intended to prevent it during operation when high temperatures in the range of about 600 0 C to a selective welding of inner layer 2 and outer layer 3 of the bellows 1 comes.
  • the intermediate layer 4 may be formed, for example, as an oxide layer, in particular as chromium oxide (Cr oxide).
  • the layer thickness d 'of the intermediate layer 4 may be greater than or equal to 1 ⁇ m in this context.
  • the intermediate layer 4 may also be formed as another metal bellows, which is formed correspondingly relative to the inner layer 2 and / or the outer layer 3 of a more oxidation-resistant material.
  • the intermediate layer 4 may also be formed as a tungsten or titanium / tungsten layer, which is applied in particular by sputtering and whose layer thickness d 1 is a few micrometers ( ⁇ m).
  • the intermediate layer 4 is formed in particular of electrodeposited chromium or nickel.
  • the intermediate layer is formed from at least one in particular chemically deposited nickel alloy, which preferably has a grain size s in the nanocrystalline range, that is 1 nm ⁇ s ⁇ 1000 nm.
  • nickel-phosphorus nickel-phosphorous-tungsten or iron-nickel-phosphorus alloys.
  • the intermediate layer 4 may also be formed as an intermetallic iron-zinc phase, as it is obtainable in particular by hot-dip galvanizing, in which context a complete conversion of zinc is required.
  • the intermediate layer 4 is formed as a carbonitride, nitride or boride surface layer, in particular as Eisencarbonitrid-, iron nitride or Eisenborid- layer, wherein the corresponding edge layer in particular by nitriding or boriding is produced in the salt bath.
  • FIGS. 2 to 4 schematically show various methods for producing the multilayer metal bellows 1 according to FIG. 1.
  • the metal tube 5 shows a smooth-cylindrical metal tube 5, from which one of the metal layers 2, 3 (cf., FIG. 1) of the multilayer metal bellows is formed by forming.
  • the metal tube 5 is provided with a sufficiently ductile coating, at least on one of its lateral surfaces 5a, 5b, before forming, which forms the intermediate layer 4 (see FIG. Whether the inner lateral surface 5a or the outer lateral surface 5b is coated in particular depends in particular on whether the metal tube 5 should subsequently be used as the inner layer 2 or as the outer layer 3 of the metal bellows 1 (see FIG.
  • the metal tube 5 is reshaped and used as the inner or outer layer of the multilayer metal bellows 1 according to FIG.
  • the forming expediently takes place only after introduction of the metal tube 5 into the already formed outer layer, which is known per se to the person skilled in the art.
  • FIG. 3 shows an alternative embodiment of the method for producing the multilayer metal bellows 1 according to FIG. 1.
  • first the forming process for forming the outer layer 3 is carried out, which is subsequently coated on its inner side in order to form the intermediate layer 4 (see FIG 1) train.
  • the coating process itself is symbolized in FIG. 3 by means of arrows P3.
  • FIG. 4 shows a further method for producing the multilayer metal bellows 1 according to FIG. 1.
  • the inner layer 2 and the outer layer 3 are bellows-shaped, and subsequently the intermediate layer 4, which in FIG is shown produced directly between the inner layer 2 and the outer layer 3, which is symbolized by the arrow P4, for example by oxidation in the area between the inner layer 2 and outer layer 3.
  • the distance between the inner layer 2 and outer layer. 3 For reasons of illustration, it is markedly exaggerated.
  • the intermediate layer 4 allows the use of hardenable materials for producing multilayer metal bellows.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Diaphragms And Bellows (AREA)

Abstract

Soufflet métallique multicouche (1), en particulier en tant qu'élément de conduite flexible pour applications sur des véhicules à moteur, comprenant au moins deux couches métalliques, à savoir une couche interne (2) et une couche externe (3) entourant la couche interne (2), caractérisé en ce qu'il est prévu entre la couche interne (2) et la couche externe (3), dans au moins une section partielle du soufflet (1), au moins une couche intermédiaire (4), sous forme d'une barrière de diffusion pour le matériau de la couche interne et/ou pour le matériau de la couche externe.
EP09729581A 2008-04-07 2009-03-04 Soufflet métallique multicouche et son procédé de production Withdrawn EP2260221A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200810017599 DE102008017599A1 (de) 2008-04-07 2008-04-07 Mehrlagiger Metallbalg und Verfahren zu dessen Herstellung
PCT/EP2009/001507 WO2009124619A1 (fr) 2008-04-07 2009-03-04 Soufflet métallique multicouche et son procédé de production

Publications (1)

Publication Number Publication Date
EP2260221A1 true EP2260221A1 (fr) 2010-12-15

Family

ID=40677779

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09729581A Withdrawn EP2260221A1 (fr) 2008-04-07 2009-03-04 Soufflet métallique multicouche et son procédé de production

Country Status (3)

Country Link
EP (1) EP2260221A1 (fr)
DE (1) DE102008017599A1 (fr)
WO (1) WO2009124619A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2551459C1 (ru) * 2014-03-25 2015-05-27 Открытое акционерное общество Центральный научно-исследовательский институт специального машиностроения Многослойный сильфон

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010027570B3 (de) * 2010-07-19 2011-11-10 Eagleburgmann Germany Gmbh & Co. Kg Faltenbalg-Kompensator
JP5842385B2 (ja) * 2011-05-18 2016-01-13 株式会社明電舎 ベローズおよびその製造方法
DE102012205496A1 (de) * 2012-04-04 2013-10-10 Witzenmann Gmbh Thermisch isoliertes Leitungselement und Verfahren zu dessen Herstellung
DE102014117582B4 (de) * 2014-12-01 2020-12-03 Witzenmann Gmbh Leitungsanordnung und Verfahren zu deren Herstellung
DE102015009246A1 (de) 2015-07-17 2017-01-19 Man Truck & Bus Ag Kompensator, insbesondere für Kfz-Anwendungen
EP4069998B1 (fr) * 2019-12-03 2024-03-06 ABB Schweiz AG Soufflet pour interrupteur à vide, pour compensateur d'échappement ou pour soupape
FR3141227A1 (fr) * 2022-10-24 2024-04-26 Safran Aerosystems Raccord rotulaire pour tuyauterie d’un moteur, tuyauterie et aéronef associés.

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Publication number Priority date Publication date Assignee Title
FR721495A (fr) * 1930-11-07 1932-03-03 Berlin Karlsruher Industrie Werke Ag Membrane métallique formant soufflet à plis pour hautes pressions
US2539237A (en) * 1945-02-02 1951-01-23 Metallschlauchfabrik Ag Method of making interleaved tubes
NL125871C (fr) * 1963-02-06
CA1148795A (fr) * 1981-09-09 1983-06-28 Cyril J. Astil Methode de production d'un soufflet metallique ondule a paroi multicouche
JPH0238759A (ja) * 1988-07-26 1990-02-08 Matsushita Electric Works Ltd 電着ベローズおよび密封型接点装置
JPH0238758A (ja) * 1988-07-26 1990-02-08 Matsushita Electric Works Ltd 電着ベローズ、その製造方法、および密封型接点装置
FR2758588B1 (fr) * 1997-01-23 1999-02-19 Hutchinson Flexible de decouplage monte dans une ligne d'echappement d'un moteur de vehicule automobile

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2009124619A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2551459C1 (ru) * 2014-03-25 2015-05-27 Открытое акционерное общество Центральный научно-исследовательский институт специального машиностроения Многослойный сильфон

Also Published As

Publication number Publication date
WO2009124619A1 (fr) 2009-10-15
DE102008017599A1 (de) 2009-10-08

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