EP2131972B1 - Verfahren zur herstellung eines hochdruckspeicherrohres aus stahl für kraftstoffeinspritzanlagen sowie mit diesem verfahren hergestelltes hochdruckspeicherrohr - Google Patents

Verfahren zur herstellung eines hochdruckspeicherrohres aus stahl für kraftstoffeinspritzanlagen sowie mit diesem verfahren hergestelltes hochdruckspeicherrohr Download PDF

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Publication number
EP2131972B1
EP2131972B1 EP08706742A EP08706742A EP2131972B1 EP 2131972 B1 EP2131972 B1 EP 2131972B1 EP 08706742 A EP08706742 A EP 08706742A EP 08706742 A EP08706742 A EP 08706742A EP 2131972 B1 EP2131972 B1 EP 2131972B1
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EP
European Patent Office
Prior art keywords
pipe part
inner pipe
steel
pressure storage
outer pipe
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
EP08706742A
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German (de)
English (en)
French (fr)
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EP2131972A1 (de
Inventor
Michael Hagedorn
Uwe Lechtenfeld
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.)
Salzgitter Mannesmann Prazisrohr GmbH
Original Assignee
Salzgitter Mannesmann Prazisrohr GmbH
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Publication of EP2131972A1 publication Critical patent/EP2131972A1/de
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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
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/06—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes in openings, e.g. rolling-in
    • 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
    • B21C37/154—Making multi-wall tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K25/00—Uniting components to form integral members, e.g. turbine wheels and shafts, caulks with inserts, with or without shaping of the components
    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
    • F02M55/025—Common rails
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/90—Selection of particular materials
    • F02M2200/9053—Metals
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49909—Securing cup or tube between axially extending concentric annuli
    • Y10T29/49911—Securing cup or tube between axially extending concentric annuli by expanding inner annulus
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49925—Inward deformation of aperture or hollow body wall
    • Y10T29/49927—Hollow body is axially joined cup or tube

Definitions

  • the invention relates to a method for producing a high-pressure storage steel from steel for fuel injection systems, according to the preamble of claim 1 and a high pressure storage tube according to claim 6.
  • High-pressure storage pipes for fuel injection systems of internal combustion engines are also referred to as common-rail system.
  • the pressure generation and the fuel injection are decoupled from each other in the common rail system.
  • a separate high-pressure pump continuously generates pressure which is stored in the central high-pressure accumulator independently of the injection sequence. From this reservoir, high-pressure lines lead to the individual injectors, which are assigned to the engine cylinders. The built-up pressure is permanently available in the fuel line.
  • These composite tubes consist of a relatively thin-walled inner and a relatively thick-walled outer tube part, which are connected to one another via a press fit.
  • the press fit is achieved, for example, by cold drawing ( DE 197 16 659 C2 ) generated.
  • the inner tube part is made of a high-alloy, corrosion-resistant and high-strength steel in direct contact with the high-pressure fuel mixture, while the outer tube part usually consists of a non-alloyed or low-alloyed steel.
  • High-pressure accumulator pipes which have no line function but essentially storage function, must, in addition to the required mechanical properties, have a high fatigue strength in order to withstand the high and pulsating pressures present during operation. This requires an excellent with a very low roughness provided inside pipe surface, which can not be achieved with the known production method for high-pressure storage pipes. For example, roughness values of R z ⁇ 1.0 ⁇ m and R a ⁇ 0.2 ⁇ m should be achieved.
  • High-pressure storage tubes are z. B. from the DE 10 2004 030 394 B3 and the DE 199 36 685 A1 known.
  • the two-time drawing process involves high costs, the tubes often lack sufficient surface quality and marginal zone properties, and costly autofrettage is also required.
  • the DE 103 03 853 A1 known high pressure storage tube it is a composite tube of two pipe parts that are connected by heating or shrinkage. Another disadvantage here is that the inner tube part is made deep drilled.
  • the object of the invention is to provide a method for producing a high pressure storage steel of high fatigue strength for fuel injection systems, which overcomes the disadvantages of the known manufacturing method.
  • a method is used in which the high-pressure accumulator tube is formed as a composite tube, wherein a first inner tube part is inserted into a second outer tube part with little play, and the inner tube part by mechanical deformation without splitting and frictionally connected to the outer tube part becomes.
  • the mechanical forming consists of a rolling process in which the inner tube part using an oversized rolling tool moved therein, a plastic and the outer tube part undergoes elastic stretching, and after the forming process on the elastic resilience of the outer tube part, the inner tube part one of the operational pressurization adapted compressive residual stress is applied.
  • Tubular rolling is a method based on the principle of roll rolling with rolling interference in mated tube parts. This leads to a local expansion of the inner tube part in a matched outer tube part.
  • the inner tube part is plastically expanded by the rolling tool, which moves axially through the inner tube part with rolling interference.
  • the outer tube part is elastically deformed by the plastic expansion of the inner tube part, so that adjusts a high surface pressure after the spring back of the outer tube part in the joint gap and thus results in a frictional connection.
  • the compressive stresses on the inner tube part introduced by the rolling process have a positive effect on the fatigue strength of the component. This can cause that the required in the known methods autofrettage treatment to increase the residual compressive stresses on the component or a complex additional smoothing of the inner surface with this method can be omitted depending on the requirements, so that the manufacturing cost can be further reduced. Even a time-consuming deep drilling process is no longer necessary.
  • Table 1 shows by way of example the chemical composition for such a steel: Table 1 Chemical Analysis (%) C Si Mn P S Not a word Cr N Ni ⁇ 0.07 ⁇ 1.00 ⁇ 2.00 ⁇ 0.045 ⁇ 0.015 ⁇ 2.50 16.5 to 19.5 ⁇ 0.11 8.0-13.0
  • the high-pressure accumulator tube designed as a composite tube consists of a first inner tube part 2, which is inserted into a second outer tube part 1 with little play.
  • the composite pipe is produced by tube rolling (not shown here) in such a way that after the rolling-in process via the elastic springback of the outer pipe part 1, the inner pipe part 2 is subjected to a compressive residual stress adapted to the operating pressure and the inner surface of the inner pipe part 1 has roughness values of R z in the range of ⁇ 1.0 ⁇ m and roughness R a in the range of ⁇ 0.2 ⁇ m.
  • the outer tube part 1 is formed relatively thick-walled and consists of a non-alloyed or low-alloy steel.
  • the inner tube part 1 is formed relatively thin-walled and consists of a plastic deformation in Rohrinwalzen adapted high-alloyed material.
  • the high-pressure storage tube is provided at one end with a sealing plug 5.
  • the composite tube is provided with a corresponding number of continuous radial bores 3, on which coaxial ports 4 are mounted for the pressure lines on the outer tube part.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP08706742A 2007-03-07 2008-01-10 Verfahren zur herstellung eines hochdruckspeicherrohres aus stahl für kraftstoffeinspritzanlagen sowie mit diesem verfahren hergestelltes hochdruckspeicherrohr Active EP2131972B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007011868A DE102007011868B3 (de) 2007-03-07 2007-03-07 Verfahren zur Herstellung eines Hochdruckspeicherrohres aus Stahl für Kraftstoffeinspritzanlagen
PCT/DE2008/000041 WO2008106911A1 (de) 2007-03-07 2008-01-10 Verfahren zur herstellung eines hochdruckspeicherrohres aus stahl für kraftstoffeinspritzanlagen sowie mit diesem verfahren hergestelltes hochdruckspeicherrohr

Publications (2)

Publication Number Publication Date
EP2131972A1 EP2131972A1 (de) 2009-12-16
EP2131972B1 true EP2131972B1 (de) 2010-06-23

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP08706742A Active EP2131972B1 (de) 2007-03-07 2008-01-10 Verfahren zur herstellung eines hochdruckspeicherrohres aus stahl für kraftstoffeinspritzanlagen sowie mit diesem verfahren hergestelltes hochdruckspeicherrohr

Country Status (7)

Country Link
US (1) US8918982B2 (ja)
EP (1) EP2131972B1 (ja)
JP (1) JP5525824B2 (ja)
AT (1) ATE471770T1 (ja)
CA (1) CA2678752C (ja)
DE (2) DE102007011868B3 (ja)
WO (1) WO2008106911A1 (ja)

Families Citing this family (10)

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DE102009000538A1 (de) * 2009-02-02 2010-08-05 Robert Bosch Gmbh Geometrie zur Festigkeitssteigerung bei Bohrungsverschneidungen im Hochdruckbereich
DE102009046437B4 (de) 2009-11-05 2018-04-19 Man Diesel & Turbo Se Verfahren zum Bearbeiten einer Einspritzdüse
DE102009057176A1 (de) * 2009-12-05 2011-06-09 Volkswagen Ag Verfahren zur Autofrettage eines Bauteils
CN103272878A (zh) * 2013-06-09 2013-09-04 汤晓明 制造复合钢管的方法
DE102015212868A1 (de) * 2015-07-09 2017-01-12 Hirschvogel Umformtechnik Gmbh Innendruckbelastetes Bauteil
DE102015117956A1 (de) * 2015-10-21 2017-04-27 Salzgitter Flachstahl Gmbh Verbundrohr bestehend aus einem Trägerrohr und mindestens einem Schutzrohr und Verfahren zur Herstellung hierfür
DE102017104608B4 (de) * 2017-03-06 2022-12-29 Gkn Powder Metallurgy Engineering Gmbh Rohrleitungsabschnitt einer Common-Rail-Leitung und Verfahren zu dessen Herstellung
CN111094611A (zh) * 2017-09-13 2020-05-01 神钢特殊钢管株式会社 奥氏体系不锈钢及其制造方法
CN111051679A (zh) * 2017-09-14 2020-04-21 山特维克原料技术德国公开股份有限公司 分配器燃料导轨和制造分配器燃料导轨的方法
CN113123905B (zh) * 2020-01-15 2022-07-26 纬湃汽车电子(长春)有限公司 燃料分配器

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US3863328A (en) * 1972-10-10 1975-02-04 Copperweld Steel Co Method of making a Composite steel tubing
DE2945085A1 (de) * 1979-11-08 1981-05-21 Interatom Internationale Atomreaktorbau Gmbh, 5060 Bergisch Gladbach Verfahren und einrichtungen zum einwalzen von innenseitig beschichteten rohren
JPS62101328A (ja) * 1985-10-30 1987-05-11 Kawasaki Heavy Ind Ltd 複重管製造方法
JPH0640924Y2 (ja) * 1988-09-30 1994-10-26 三桜工業株式会社 燃料噴射装置用燃料分配管
DE4105701A1 (de) * 1990-03-08 1991-09-12 Mannesmann Ag Verfahren zur herstellung eines metallischen, dickwandigen hochdruckrohres
DE4405432C1 (de) * 1994-02-21 1995-02-02 Daimler Benz Ag Hochdruckspeicher als Kraftstoffverteilungsrohr, insbesondere für eine Brennkraftmaschine mit Common-Rail-System
US5887628A (en) * 1996-04-22 1999-03-30 Usui Kokusai Sangyo Kaisha Limited High pressure fuel injection pipe for diesel internal combustion engine
JP3841372B2 (ja) * 1997-02-26 2006-11-01 臼井国際産業株式会社 高圧燃料噴射管およびその製造方法
JP3888410B2 (ja) * 1998-09-01 2007-03-07 株式会社デンソー 高圧燃料供給装置
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Also Published As

Publication number Publication date
DE102007011868B3 (de) 2008-09-04
US20110041946A1 (en) 2011-02-24
WO2008106911A1 (de) 2008-09-12
DE502008000844D1 (de) 2010-08-05
US8918982B2 (en) 2014-12-30
ATE471770T1 (de) 2010-07-15
CA2678752A1 (en) 2008-09-12
JP2010520403A (ja) 2010-06-10
EP2131972A1 (de) 2009-12-16
JP5525824B2 (ja) 2014-06-18
CA2678752C (en) 2015-10-20

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