EP1411237A1 - Internal pressure loaded element having non-cylindrical cross section and method for its production - Google Patents

Internal pressure loaded element having non-cylindrical cross section and method for its production Download PDF

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Publication number
EP1411237A1
EP1411237A1 EP03015167A EP03015167A EP1411237A1 EP 1411237 A1 EP1411237 A1 EP 1411237A1 EP 03015167 A EP03015167 A EP 03015167A EP 03015167 A EP03015167 A EP 03015167A EP 1411237 A1 EP1411237 A1 EP 1411237A1
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EP
European Patent Office
Prior art keywords
section
internal pressure
longitudinal bore
cross
component
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Withdrawn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
EP03015167A
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German (de)
French (fr)
Inventor
Manfred Wilhelm
Wilhelm Hopf
Dieter Holz
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1411237A1 publication Critical patent/EP1411237A1/en
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • 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
    • B21C37/155—Making tubes with non circular section
    • 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
    • B21K21/00—Making hollow articles not covered by a single preceding sub-group
    • B21K21/16—Remodelling hollow bodies with respect to the shape of the cross-section
    • 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
    • F02M2200/8053—Fuel injection apparatus manufacture, repair or assembly involving mechanical deformation of the apparatus or parts thereof

Definitions

  • the invention relates to a component subject to internal pressure, in particular for fuel injection systems, consisting of an elongated tubular body with a longitudinal bore and at least a cross hole with connecting parts for supply and discharge.
  • accumulator injections common rail
  • components subject to internal pressure are necessary.
  • Such components are used for high-pressure accumulators (rails) and injectors.
  • the object of the invention is to further increase the strength to create in particular in the area of drilling intersections.
  • the solution principle of the task is instead of a conventional one cylindrical cross section known from the prior art a non-cylindrical cross section for the longitudinal bore to use and apply a process about plastic deformation, to make such a cross section.
  • a major advantage of the invention is that in particular for forged components subject to internal pressure where the connections with the cross holes on the elongated Bodies are forged to deform in such a way that from the cylindrical cross section produced by deep hole drilling a non-cylindrical cross section is created in the longitudinal bore.
  • suitable supports level or V-shaped support
  • suitable supports for example, that an elliptical Cross-section arises, also in the intersection area non-cylindrical cross sections arise and thus load voltages, which especially in these areas due to the high pressures arise, be minimized.
  • the component to heat either partially or in its entirety in order to to enable such an upsetting in a simple manner.
  • Fig. 1 is an internal pressure loaded component 1 in the form of a Common rails shown.
  • This component 1 has an outer contour 2, and a connecting part 3 adjoining the outer contour.
  • This connecting part 3 additionally has a transverse bore 4, that in an intersection area 5 with that within the internal pressure Component arranged longitudinal bore corresponds.
  • the longitudinal bore 6 points in its original (in the drawing not shown) state a circular, cylindrical Cross section on.
  • the internal pressure loaded component is preferably as whole completely heated and supported on a level 7, against which pushes a force F.
  • force F causes the outer contour of the component subjected to internal pressure expands in the direction of R1 and R2 and so does the corresponding cylindrical cross section of the longitudinal bore 6 depending the magnitude of the force F is elliptical.

Abstract

The internally-pressurized component (1) has an elongate tubular body provided with a longitudinal bore (6) and at least one transverse bore with entry and exit connections. The external contour (2) of the internally-pressurized component and the longitudinal bore each have a non-cylindrical cross--section. An Independent claim for a manufacturing method for an internally-pressurized component is also included.

Description

Die Erfindung betrifft ein innendruckbelastetes Bauteil, insbesondere für Kraftstoff-Einspritzsysteme, bestehend aus einem langgestreckten rohrartigen Körper mit einer Längsbohrung sowie mindestens einer Querbohrung mit Anschlussteilen zur Zu- und Abfuhr.The invention relates to a component subject to internal pressure, in particular for fuel injection systems, consisting of an elongated tubular body with a longitudinal bore and at least a cross hole with connecting parts for supply and discharge.

Stand der TechnikState of the art

Insbesondere bei sogenannten Speichereinspritzungen (Common Rail), die im Bereich der Einspritztechnik von Kraftstoffen bei Brennkraftmaschinen bzw. Verbrennungsmotoren verwendet werden, sind insbesondere innendruckbelastete Bauteile notwendig. Hier werden solche Bauteile für Hochdruckspeicher (Rail) und Injektoren verwendet. Especially with so-called accumulator injections (common rail), those in the field of fuel injection technology for internal combustion engines or internal combustion engines are used in particular, components subject to internal pressure are necessary. Be here such components are used for high-pressure accumulators (rails) and injectors.

Diese Bauteile eignen sich insbesondere für Kraftstoff-Einspritzsysteme und diese stehen nicht nur unter sehr hohem Innendruck, sondern sind darüber hinaus periodisch starken Schwankungen des Innendrucks unterworfen. Daher müssen solche Bauteile entsprechend hohe Festigkeitsanforderungen erfüllen. Insbesondere kommt es in erster Linie auf die Festigkeit an den Verschneidungen von Längs- und Querbohrung an.These components are particularly suitable for fuel injection systems and these are not only under very high internal pressure, but are also periodically strong fluctuations subject to internal pressure. Therefore, such components meet correspondingly high strength requirements. In particular it is primarily the strength of the intersections from longitudinal and transverse drilling.

Aufgabe der ErfindungObject of the invention

Aufgabe der Erfindung ist es, eine weitere Erhöhung der Festigkeit insbesondere im Bereich der Bohrungsverschneidungen zu schaffen.The object of the invention is to further increase the strength to create in particular in the area of drilling intersections.

Lösung der AufgabeSolution of the task

Das Lösungsprinzip der Aufgabe besteht darin, anstelle eines herkömmlich aus dem Stand der Technik bekannten zylindrischen Querschnitts einen nichtzylindrischen Querschnitt für die Längsbohrung zu verwenden und ein Verfahren über plastische Deformation anzuwenden, um einen solchen Querschnitt herzustellen.The solution principle of the task is instead of a conventional one cylindrical cross section known from the prior art a non-cylindrical cross section for the longitudinal bore to use and apply a process about plastic deformation, to make such a cross section.

Vorteile der ErfindungAdvantages of the invention

Ein wesentlicher Vorteil der Erfindung besteht darin, dass insbesondere bei geschmiedeten innendruckbelasteten Bauteilen, bei denen die Anschlüsse mit den Querbohrungen an den langgestreckten Körper angeschmiedet sind, derart zu verformen, dass aus dem an sich durch Tieflochbohrung hergestellten zylindrischen Querschnitt der Längsbohrung ein nichtzylindrischer Querschnitt entsteht. A major advantage of the invention is that in particular for forged components subject to internal pressure where the connections with the cross holes on the elongated Bodies are forged to deform in such a way that from the cylindrical cross section produced by deep hole drilling a non-cylindrical cross section is created in the longitudinal bore.

Insbesondere durch geeignete Auflagen (Ebene oder V-förmige Auflage) kann erreicht werden, dass beispielsweise ein elliptischer Querschnitt entsteht, wobei im Verschneidungsbereich ebenfalls nicht zylindrische Querschnitte entstehen und so Lastspannungen, die insbesondere in diesen Bereichen aufgrund der hohen Drücke entstehen, minimiert werden. Zur einfachen Herstellung eines solchen innendruckbelasteten Bauteils ist vorgesehen, dass Bauteil entweder partiell oder auch in seiner Gesamtheit zu erwärmen, um so ein Anstauchen auf einfache Art und Weise zu ermöglichen.In particular through suitable supports (level or V-shaped support) can be achieved, for example, that an elliptical Cross-section arises, also in the intersection area non-cylindrical cross sections arise and thus load voltages, which especially in these areas due to the high pressures arise, be minimized. For the simple production of such it is provided that the component to heat either partially or in its entirety in order to to enable such an upsetting in a simple manner.

Weitere Vorteile gehen aus der nachfolgenden Beschreibung, den Ansprüchen sowie den Zeichnungen hervor.Further advantages result from the following description, the claims as well as the drawings.

Zeichnungendrawings

Es zeigen:

Fig. 1
Ein erstes Ausführungsbeispiel eines Verfahrensschritts zur Herstellung einer im Querschnitt nicht zylindrischen Längsbohrung.
Fig. 2
Ein weiteres Ausführungsbeispiel eines Herstellungsschrittes zur Herstellung eines Bauteils mit einem nicht zylindrischen Querschnitt;
Fig. 3 A-G
Eine skizzenartige Darstellung von verschiedenen Anstauchmöglichkeiten eines Common Rails.
Show it:
Fig. 1
A first exemplary embodiment of a method step for producing a longitudinal bore that is not cylindrical in cross section.
Fig. 2
Another embodiment of a manufacturing step for manufacturing a component with a non-cylindrical cross section;
Fig. 3 AG
A sketch-like representation of different options for upsetting a common rail.

Beschreibung der AusführungsbeispieleDescription of the embodiments

In Fig. 1 ist ein innendruckbelastetes Bauteil 1 in Form eines Common Rails dargestellt. Dieses Bauteil 1 weist eine Außenkontur 2 auf, und ein an der Außenkontur anschließendes Anschlussteil 3. Dieses Anschlussteil 3 weist zusätzlich eine Querbohrung 4 auf, die in einem Verschneidungsbereich 5 mit der innerhalb des innendruckbelasteten Bauteils angeordneten Längsbohrung korrespondiert.In Fig. 1 is an internal pressure loaded component 1 in the form of a Common rails shown. This component 1 has an outer contour 2, and a connecting part 3 adjoining the outer contour. This connecting part 3 additionally has a transverse bore 4, that in an intersection area 5 with that within the internal pressure Component arranged longitudinal bore corresponds.

Die Längsbohrung 6 weist in ihrem ursprünglichen (in der Zeichnung nicht dargestellten) Zustand einen kreisrunden, zylindrischen Querschnitt auf.The longitudinal bore 6 points in its original (in the drawing not shown) state a circular, cylindrical Cross section on.

Zur Herstellung des in der Zeichnung dargestellten elliptischen Querschnitts wird das innendruckbelastete Bauteil vorzugsweise als ganzes vollständig erwärmt und auf eine Ebene 7 gestützt, gegen die eine Kraft F drückt. Durch dieses Anstauchen mittels der Kraft F wird bewirkt, dass die Außenkontur des innendruckbelasteten Bauteils sich in die Richtung R1 und R2 ausdehnt und so auch der entsprechend zylindrische Querschnitt der Längsbohrung 6 sich in Abhängigkeit der Größe der Kraft F elliptisch ausbildet.To produce the elliptical shown in the drawing Cross section, the internal pressure loaded component is preferably as whole completely heated and supported on a level 7, against which pushes a force F. By this upsetting by force F causes the outer contour of the component subjected to internal pressure expands in the direction of R1 and R2 and so does the corresponding cylindrical cross section of the longitudinal bore 6 depending the magnitude of the force F is elliptical.

Bei dem in Figur 2 dargestellten Ausführungsbeispiel wird anstelle einer ebenen Fläche 7 eine V-förmige ausgebildete Gegenfläche 7' verwendet. Diese bewirkt, dass der in Figur 2 dargestellte elliptische Querschnitt der Längsbohrung 6 entsteht und die Außenkontur 2 sich ebenfalls entsprechend der V-förmigen Ausbildung der Fläche 7' ausbildet.In the embodiment shown in Figure 2 is used instead a flat surface 7 a V-shaped counter surface 7 ' used. This causes the elliptical one shown in FIG Cross section of the longitudinal bore 6 and the outer contour 2 are also in accordance with the V-shaped formation of the surface 7 'trains.

In den Fig. 3 A-G sind unterschiedliche Möglichkeiten der plastischen Verformung dargestellt.3 A-G are different possibilities of plastic Deformation shown.

Durch einen einfachen Anstauchvorgang (plastische Verformung), insbesondere bei geschmiedeten Bauteilen, kann ein optimaler Querschnitt der Längsbohrung insbesondere im Verschneidungsbereich erzielt werden.By a simple upsetting process (plastic deformation), especially with forged components, an optimal cross section can be achieved the longitudinal bore is achieved in particular in the intersection area become.

Claims (6)

Innendruckbelastetes Bauteil, insbesondere für Kraftstoffeinspritzsysteme, bestehend aus einem langgestreckten rohrartigen Körper mit einer Längsbohrung sowie mindestens einer Querbohrung mit einem Anschlussteil zur Zu- und Abfuhr, dadurch gekennzeichnet, dass die Längsbohrung (6) und die Außenkontur (2) des innendruckbelasteten Bauteils (1) einen nicht-zylindrischen Querschnitt aufweist.Component subject to internal pressure, in particular for fuel injection systems, consisting of an elongated tubular body with a longitudinal bore and at least one transverse bore with a connecting part for supply and discharge, characterized in that the longitudinal bore (6) and the outer contour (2) of the component (1) subject to internal pressure has a non-cylindrical cross section. Bauteil nach Anspruch 1, dadurch gekennzeichnet, dass im Verschneidungsbereich (5) die Längsbohrung (6) abgeflacht ist.Component according to claim 1, characterized in that in the intersection area (5) the longitudinal bore (6) is flattened. Verfahren zur Herstellung eines innendruckbelasteten Bauteils, insbesondere für Kraftstoffeinspritzsysteme, bestehend aus einem langgestreckten rohrartigen Körper mit einer Längsbohrung sowie mindestens einer Querbohrung mit einem Anschlussteil zur Zu- und Abfuhr, gekennzeichnet durch folgenden Verfahrensschritt: Druckaufgabe auf die Außenkontur (2) des Bauteils (1) gegen eine Fläche (7, 7'), wobei aus der zunächst im Querschnitt zylindrischen Längsbohrung (6) ein nicht zylindrischer Querschnitt entsteht. Method for producing a component subject to internal pressure, in particular for fuel injection systems, consisting of an elongated tubular body with a longitudinal bore and at least one transverse bore with a connecting part for supply and discharge, characterized by the following process step: Printing task on the outer contour (2) of the component (1) against a surface (7, 7 '), the non-cylindrical cross section resulting from the longitudinal bore (6), which is initially cylindrical in cross section. Verfahren nach Anspruch 3, dadurch gekennzeichnet, dass die Druckaufgabe auf das Anschlussteil (3) erfolgt. A method according to claim 3, characterized in that the printing task is carried out on the connecting part (3). Verfahren nach Anspruch 3 oder 4, dadurch gekennzeichnet, dass die Druckaufgabe gegenüber einer im Querschnitt ebenen Fläche (7) erfolgt.Method according to claim 3 or 4, characterized in that the printing is carried out in relation to a surface (7) which is flat in cross section. Verfahrens nach einem der Ansprüche 3 oder 4, dadurch gekennzeichnet, dass die Druckaufgabe gegenüber einer im Querschnitt V-förmigen Fläche (7') ausgeübt wird.Method according to one of claims 3 or 4, characterized in that the printing task is carried out in relation to a surface (7 ') which is V-shaped in cross section.
EP03015167A 2002-10-19 2003-07-04 Internal pressure loaded element having non-cylindrical cross section and method for its production Withdrawn EP1411237A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10248800 2002-10-19
DE2002148800 DE10248800A1 (en) 2002-10-19 2002-10-19 Internal pressure-loaded component and method for producing an internal pressure-loaded component with a non-cylindrical cross section

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EP1411237A1 true EP1411237A1 (en) 2004-04-21

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JP (1) JP2004138061A (en)
DE (1) DE10248800A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2687302A1 (en) * 2012-07-20 2014-01-22 Benteler Automobiltechnik GmbH Method for producing a high pressure fuel line

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2392816B1 (en) 2010-06-03 2013-10-09 Delphi Technologies Holding S.à.r.l. Stress Relief in Pressurized Fluid Flow System

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10169527A (en) * 1996-12-07 1998-06-23 Usui Internatl Ind Co Ltd Common rail
JPH10196869A (en) * 1997-01-14 1998-07-31 Usui Internatl Ind Co Ltd Common rail
JPH10318084A (en) * 1997-03-03 1998-12-02 Usui Internatl Ind Co Ltd Slider incorporated type member having branch hole for high pressure fluid
DE19913793A1 (en) * 1999-03-26 2000-10-19 Daimler Chrysler Ag Procedure for manufacture of HP pipe distributing fuel to injectors of internal combustion engine entails attachment of nipples by friction welding to main pipe, with main pipe and nipples made of high strength non-rusting material
DE19948339C1 (en) * 1999-10-07 2000-12-14 Bosch Gmbh Robert High pressure fuel reservoir for common-rail fuel injection system for i.c. engine provided by hollow tubular body with its interiror space provided by coupled or overlapping cylindrical recesses
DE19937444C1 (en) * 1999-08-07 2001-01-18 Winkelmann & Pannhoff Gmbh Fuel distribution device for i.c. engine fuel injection system has fuel injection valves fitted directly to fuel distribution line via connection elements fitted to fuel distribution openings along fuel distribution line
US20010029929A1 (en) * 2000-04-13 2001-10-18 Tetsushi Natsume Common rail fuel injection system
US20020112697A1 (en) * 2000-11-14 2002-08-22 Helmut Knoedl Fuel high pressure accumulator for fuel injection system of internal combustion engines
DE10140058A1 (en) * 2001-08-16 2002-10-24 Bosch Gmbh Robert High pressure fuel storage-container has basic body with lengthwise and transverse hollow cavities, connecting support, and inner storage chamber
DE10123234A1 (en) * 2001-05-12 2002-11-28 Bosch Gmbh Robert High pressure fuel accumulator for a common rail fuel injection system of an internal combustion engine comprises an accumulator chamber and a base body having a cylindrical, elliptical or polygonal cross-section

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10169527A (en) * 1996-12-07 1998-06-23 Usui Internatl Ind Co Ltd Common rail
JPH10196869A (en) * 1997-01-14 1998-07-31 Usui Internatl Ind Co Ltd Common rail
JPH10318084A (en) * 1997-03-03 1998-12-02 Usui Internatl Ind Co Ltd Slider incorporated type member having branch hole for high pressure fluid
DE19913793A1 (en) * 1999-03-26 2000-10-19 Daimler Chrysler Ag Procedure for manufacture of HP pipe distributing fuel to injectors of internal combustion engine entails attachment of nipples by friction welding to main pipe, with main pipe and nipples made of high strength non-rusting material
DE19937444C1 (en) * 1999-08-07 2001-01-18 Winkelmann & Pannhoff Gmbh Fuel distribution device for i.c. engine fuel injection system has fuel injection valves fitted directly to fuel distribution line via connection elements fitted to fuel distribution openings along fuel distribution line
DE19948339C1 (en) * 1999-10-07 2000-12-14 Bosch Gmbh Robert High pressure fuel reservoir for common-rail fuel injection system for i.c. engine provided by hollow tubular body with its interiror space provided by coupled or overlapping cylindrical recesses
US20010029929A1 (en) * 2000-04-13 2001-10-18 Tetsushi Natsume Common rail fuel injection system
US20020112697A1 (en) * 2000-11-14 2002-08-22 Helmut Knoedl Fuel high pressure accumulator for fuel injection system of internal combustion engines
DE10123234A1 (en) * 2001-05-12 2002-11-28 Bosch Gmbh Robert High pressure fuel accumulator for a common rail fuel injection system of an internal combustion engine comprises an accumulator chamber and a base body having a cylindrical, elliptical or polygonal cross-section
DE10140058A1 (en) * 2001-08-16 2002-10-24 Bosch Gmbh Robert High pressure fuel storage-container has basic body with lengthwise and transverse hollow cavities, connecting support, and inner storage chamber

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 11 30 September 1998 (1998-09-30) *
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 12 31 October 1998 (1998-10-31) *
PATENT ABSTRACTS OF JAPAN vol. 1999, no. 03 31 March 1999 (1999-03-31) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2687302A1 (en) * 2012-07-20 2014-01-22 Benteler Automobiltechnik GmbH Method for producing a high pressure fuel line

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JP2004138061A (en) 2004-05-13

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