EP2131972A1 - 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 hochdruckspeicherrohrInfo
- Publication number
- EP2131972A1 EP2131972A1 EP08706742A EP08706742A EP2131972A1 EP 2131972 A1 EP2131972 A1 EP 2131972A1 EP 08706742 A EP08706742 A EP 08706742A EP 08706742 A EP08706742 A EP 08706742A EP 2131972 A1 EP2131972 A1 EP 2131972A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tube part
- outer tube
- inner tube
- pressure accumulator
- pressure
- 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
Links
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, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles 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 methods for the production of a high-pressure storage steel from steel for fuel injection systems, according to the preamble of claim 1 and a high-pressure storage pipe 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 generated for example by cold drawing (DE 197 16 659 C2).
- 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 Ra ⁇ 0.2 ⁇ m should be achieved.
- High-pressure storage tubes are z. B. from DE 10 2004 030 394 B3 and DE 199 36 685 A1.
- 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.
- 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 stress concentrations and notch effect effects negatively influencing the fatigue strength can be reduced in such a way that a long service life of the storage tube is achieved.
- 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 below shows by way of example the chemical composition for such a steel:
- 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 2 in the range of ⁇ 1, 0 microns and a roughness R a in the range of ⁇ 0.2 microns have.
- 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 adapted during Rohrinwalzen high alloyed
- 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)
Description
Claims
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 true EP2131972A1 (de) | 2009-12-16 |
| EP2131972B1 EP2131972B1 (de) | 2010-06-23 |
Family
ID=39643958
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 (de) |
| EP (1) | EP2131972B1 (de) |
| JP (1) | JP5525824B2 (de) |
| AT (1) | ATE471770T1 (de) |
| CA (1) | CA2678752C (de) |
| DE (2) | DE102007011868B3 (de) |
| WO (1) | WO2008106911A1 (de) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CA3075882C (en) * | 2017-09-13 | 2023-01-10 | Kobelco Steel Tube Co., Ltd. | Austenitic stainless steel and production method thereof |
| KR20200047529A (ko) * | 2017-09-14 | 2020-05-07 | 산드빅 마테리알스 테크놀로지 도이칠란트 게엠베하 | 분배기 연료 레일 및 분배기 연료 레일의 제조 방법 |
| 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 |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| DE19936685A1 (de) * | 1999-08-04 | 2001-02-22 | Bosch Gmbh Robert | Kraftstoffhochdruckspeicher |
| DE10303853B4 (de) * | 2003-01-30 | 2008-07-10 | Schmittergroup Ag | Verfahren zur Herstellung einer zusammengesetzten Metall-Leitung für unter Hochdruck stehenden Kraftstoff sowie eine danach hergestellte zusammengesetzte Metall-Leitung |
| JP2005076477A (ja) * | 2003-08-28 | 2005-03-24 | Otics Corp | デリバリパイプ |
| DE20317565U1 (de) * | 2003-11-12 | 2005-03-24 | Ti Automotive Heidelberg Gmbh | Mehrschichtiges metallisches Hochdruckleitungsrohr |
| EP1709320A2 (de) * | 2004-01-26 | 2006-10-11 | SchmitterGroup AG | Hochdruck-speicherleitung mit gussaussenmantel f r common-ra il |
| DE102004030394B3 (de) * | 2004-06-23 | 2005-05-04 | Benteler Automobiltechnik Gmbh | Common-Rail |
-
2007
- 2007-03-07 DE DE102007011868A patent/DE102007011868B3/de active Active
-
2008
- 2008-01-10 WO PCT/DE2008/000041 patent/WO2008106911A1/de not_active Ceased
- 2008-01-10 EP EP08706742A patent/EP2131972B1/de active Active
- 2008-01-10 CA CA2678752A patent/CA2678752C/en active Active
- 2008-01-10 AT AT08706742T patent/ATE471770T1/de active
- 2008-01-10 DE DE502008000844T patent/DE502008000844D1/de active Active
- 2008-01-10 US US12/528,168 patent/US8918982B2/en active Active
- 2008-01-10 JP JP2009552053A patent/JP5525824B2/ja active Active
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2008106911A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| US20110041946A1 (en) | 2011-02-24 |
| DE102007011868B3 (de) | 2008-09-04 |
| ATE471770T1 (de) | 2010-07-15 |
| DE502008000844D1 (de) | 2010-08-05 |
| WO2008106911A1 (de) | 2008-09-12 |
| EP2131972B1 (de) | 2010-06-23 |
| JP5525824B2 (ja) | 2014-06-18 |
| JP2010520403A (ja) | 2010-06-10 |
| US8918982B2 (en) | 2014-12-30 |
| CA2678752C (en) | 2015-10-20 |
| CA2678752A1 (en) | 2008-09-12 |
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