EP1423237A2 - Procede de fabrication d'un accumulateur de carburant haute pression - Google Patents

Procede de fabrication d'un accumulateur de carburant haute pression

Info

Publication number
EP1423237A2
EP1423237A2 EP02769909A EP02769909A EP1423237A2 EP 1423237 A2 EP1423237 A2 EP 1423237A2 EP 02769909 A EP02769909 A EP 02769909A EP 02769909 A EP02769909 A EP 02769909A EP 1423237 A2 EP1423237 A2 EP 1423237A2
Authority
EP
European Patent Office
Prior art keywords
pressure
lance
pressure accumulator
accumulator
cavity
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Withdrawn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
EP02769909A
Other languages
German (de)
English (en)
Inventor
Christian Taudt
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP1423237A2 publication Critical patent/EP1423237A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/08—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for polishing surfaces, e.g. smoothing a surface by making use of liquid-borne abrasives
    • B24C1/083—Deburring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/10—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for compacting surfaces, e.g. shot-peening
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C3/00—Abrasive blasting machines or devices; Plants
    • B24C3/32—Abrasive blasting machines or devices; Plants designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks
    • B24C3/325—Abrasive blasting machines or devices; Plants designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks for internal surfaces, e.g. of tubes
    • 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
    • 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
    • Y10T29/47—Burnishing
    • Y10T29/479—Burnishing by shot peening or blasting

Definitions

  • the invention relates to a method for producing a high-pressure fuel accumulator according to the independent claim.
  • High-pressure fuel accumulators are used in particular in diesel engines with so-called common rail systems.
  • the fuel is compressed to a pressure of more than 1000 to more than 2000 bar using a high-pressure pump and fed to the high-pressure fuel reservoir. From this pressure lines lead to the injectors of the individual combustion chambers of the internal combustion engine.
  • the high-pressure fuel reservoir is subject to a considerable mechanical load at the prevailing pressures, which also fluctuates greatly during operation.
  • the object of the invention is to provide a method for increasing the pressure resistance of a high-pressure fuel accumulator, which avoids the disadvantages in the prior art and which enables an optimized blasting effect of the inner cutting edges.
  • This object is achieved with a method according to independent claim 1.
  • a method according to the invention for producing a high-pressure fuel accumulator of an internal combustion engine with a storage injection system, in particular a diesel internal combustion engine with a common rail injection system, in which branchings for connecting pressure lines are introduced into the latter after the production of a hollow pressure accumulator from metal in which branchings for connecting pressure lines are introduced into the latter after the production of a hollow pressure accumulator from metal, the Inner bore and in particular the vulnerable branches on their inner edges leading to a cavity of the pressure accumulator are treated by means of a shot peening process. As a result, residual compressive stresses are introduced into the material. The formation of radii is the result of such a treatment.
  • each inner edge of each branch is blasted one after the other in both directions of the course of the cavity of the pressure accumulator, the lance being directed against and / or in the jet direction.
  • This method according to the invention has the advantage that the rounding of the inner edges of the branches in the high-pressure accumulator can be produced much more uniformly and with a constant radius.
  • the radiation in both longitudinal directions of the cavity of the pressure accumulator leads to a constant treatment along the entire inner edge of each branch.
  • the lance which runs longitudinally against the jet direction of the balls, serves to deflect the balls in the direction of the walls of the inner bore of the pressure accumulator. Irradiation in two directions accordingly leads to a constant rounding depending on the duration of the irradiation.
  • the radiance of the sides ensures that the inside edges are treated evenly on all sides.
  • rounded jet grain is used, i.e. a blasting material of defined ball size and defined ball hardness. Shot peening with such blasting material ensures precisely reproducible dimensions and properties of the high-pressure accumulator, even when processing large batches.
  • the high-pressure accumulator can be made from a structural steel, a case-hardening steel, a tempering steel or also from a stainless steel.
  • a preferred embodiment of the invention provides that the high-pressure accumulator is made of forged steel, which has a particularly high strength and toughness under the changing pressure loads that occur.
  • the steels mentioned can all be strengthened by shot peening to such an extent that the inner surface is compacted and thus a notch effect is significantly reduced.
  • a preferred embodiment of the invention provides that the lance is guided centrally in the pressure accumulator.
  • the central guidance of the essentially cylindrical lance in the likewise cylindrical inner cavity of the pressure accumulator leads to a largely uniform solidification of the inner surface of the pressure accumulator due to the cone tip of the lance.
  • the central guidance can preferably be ensured in that the lance has at least three support elements which are evenly distributed on the cylindrical circumference and which can slide along the longitudinal direction in the cavity of the pressure accumulator.
  • FIG. 1 shows a partial side view of a high-pressure fuel accumulator
  • FIG. 2 shows a detail section of a branching of the pressure accumulator according to FIG. 1 and
  • Figure 3 shows a lance to influence the rounding in the inventive method for manufacturing the pressure accumulator.
  • Figure 1 shows a pressure accumulator 2, which consists of an essentially cylindrical tube 4 made of steel. On the outer circumference of the tube 4, several pressure line connections 6 can be seen, to each of which pressure lines can be connected, which lead to injectors of the internal combustion engine.
  • the tube 4 is preferably made of steel, which can be forged for strength reasons. Suitable materials for the pressure accumulator 2 are, for example, structural steel, case hardening steel, tempering steel or stainless steel, which is preferably forged.
  • FIG. 2 shows a detailed section of a branch 8 of the pressure accumulator 2 according to FIG. 1.
  • an inner bore 11 can be seen, which runs essentially cylindrically in the interior of the hollow pressure accumulator 2.
  • a plurality of branches 8 are provided perpendicular to the longitudinal direction of extension of the inner bore 11 of the tube 4, only one of which can be seen in FIG. 2.
  • the round branching can, for example, be designed as a bore which opens centrally into the inner bore 11 of the tube 4.
  • an inner edge 9 of the branch 8 is provided with a radius 10 which is produced by shot peening. Shot peening also serves to solidify the inner surface of the tube 4, thereby significantly reducing its notching effect.
  • an essentially cylindrical lance 12 which has a conical tip 14 at its end facing the beam direction 16, is guided in the shot peening along a longitudinal extension direction of the inner bore 11 in the opposite or in the same direction to the beam direction 16.
  • the cone tip 14 of the lance 12 causes a deflection of the blasting material in the direction of the walls of the inner bore 11 and in the direction of the inner edge 9 of each branch 8, whereby the inner edges 9 each have a radius 10.
  • the irradiation is carried out in both directions of the longitudinal direction of the tube 4, the lance 12 with its Cone tip 14 points in the opposite direction.
  • the beam direction 16 would be from right to left in this case, the cone tip 14 would point to the right in this case.
  • a lance is illustrated in FIG. 3, which is used to influence the rounding in the method according to the invention for producing the pressure accumulator.
  • the left image in FIG. 3 shows a top view of the cone tip 14 of the lance 12.
  • On the outer cylindrical circumference of the lance 12 a total of three support elements 18 can be seen, which are distributed in a star shape uniformly on the circumference of the lance 12 and which are dimensioned in terms of their length. that a largely play-free sliding movement of the lance 12 in the inner bore 11 of the tube 4 is made possible.
  • the right image in FIG. 3 shows a side view of a lance 12, two of the three support elements 18 being recognizable.
  • So-called shot peening which consists of metal balls of a certain hardness, is particularly suitable for shot peening. The balls each have a diameter between 0.2 and 0.6 mm, the different diameters in the blasting material following a statistical distribution.
  • Rounded grit is also particularly suitable as blasting material, ie a blasting material with a defined size and defined hardness.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

L'invention concerne un procédé de fabrication d'un accumulateur de carburant haute pression d'un moteur à combustion interne comportant un système d'injection, notamment d'un moteur diesel comportant un système d'injection à rampe commune. Ledit procédé consiste à mettre en oeuvre un accumulateur de pression métallique creux (2), et à pratiquer des ramifications (8) dans celui-ci pour le raccordement de conduites de pression. Sur leurs arêtes intérieures (9) menant à un espace creux de l'accumulateur de pression, lesdites ramifications sont pourvues d'un rayon (10) au moyen d'un procédé de jet de billes, et une lance cylindrique (12) présentant une pointe conique (14) de diamètre inférieur à celui de l'espace creux de l'accumulateur de pression, est dirigée contre le sens de projection (16) des billes employées dans le procédé de jet de billes. Selon l'invention, chaque arête intérieure (9) est soumise successivement au jet de billes dans les deux sens d'extension de l'espace creux de l'accumulateur de pression (2), la lance (12) étant respectivement dirigée dans le sens opposé.
EP02769909A 2001-09-06 2002-09-05 Procede de fabrication d'un accumulateur de carburant haute pression Withdrawn EP1423237A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10143736 2001-09-06
DE10143736A DE10143736C1 (de) 2001-09-06 2001-09-06 Verfahren zur Herstellung eines Kraftstoffhochdruckspeichers
PCT/DE2002/003291 WO2003022526A2 (fr) 2001-09-06 2002-09-05 Procede de fabrication d'un accumulateur de carburant haute pression

Publications (1)

Publication Number Publication Date
EP1423237A2 true EP1423237A2 (fr) 2004-06-02

Family

ID=7697949

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02769909A Withdrawn EP1423237A2 (fr) 2001-09-06 2002-09-05 Procede de fabrication d'un accumulateur de carburant haute pression

Country Status (6)

Country Link
US (1) US6931900B2 (fr)
EP (1) EP1423237A2 (fr)
JP (1) JP2005500916A (fr)
DE (1) DE10143736C1 (fr)
HU (1) HUP0401734A2 (fr)
WO (1) WO2003022526A2 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004051004B3 (de) 2004-10-20 2006-06-01 Bayerische Motoren Werke Ag Längsdynamiksteuersystem in Kraftfahrzeugen
JP4484227B2 (ja) * 2006-10-02 2010-06-16 ボッシュ株式会社 コモンレール
FR2908678B1 (fr) * 2007-11-27 2010-03-12 Sonats Soc Des Nouvelles Appli Procede de grenaillage d'un percage
US8322004B2 (en) * 2009-04-29 2012-12-04 Caterpilar Inc. Indirect laser induced residual stress in a fuel system component and fuel system using same
JP5500416B2 (ja) * 2009-09-09 2014-05-21 株式会社リコー インターロックスイッチと、これを用いた画像形成装置
US8561593B2 (en) * 2010-03-05 2013-10-22 Caterpillar Inc. Range of engines using common rail fuel system with pump and rail assemblies having common components
CN104209437B (zh) * 2014-09-02 2016-06-01 许崇霞 高压共轨预锻模具

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2821814A (en) * 1953-01-05 1958-02-04 J C Fennelly Company Sandblasting tool
US3485073A (en) * 1966-05-10 1969-12-23 Metal Improvement Co Internal peening apparatus
IN166218B (fr) * 1984-11-09 1990-03-31 Framatome & Cie
FR2612291B1 (fr) * 1987-03-13 1992-05-07 Framatome Sa Dispositif et procede de controle de l'efficacite du martelage par des particules, de la surface interieure d'un tube de generateur de vapeur
FR2698576B1 (fr) * 1992-11-30 1995-02-17 Framatome Sa Procédé et dispositif de réparation d'une zone défectueuse de la paroi d'une pièce métallique et en particulier d'une pièce tubulaire.
FR2713974B1 (fr) * 1993-12-22 1996-01-19 Snecma Dispositif de grenaillage de surfaces non accessibles par une canalisation droite.
JP3583031B2 (ja) * 1998-08-12 2004-10-27 株式会社日立製作所 原子炉圧力容器の内部構造部材のウォータージェットピーニング方法及びウォータージェットピーニング装置
US6189356B1 (en) * 2000-02-17 2001-02-20 General Electric Company Method and apparatus for peening

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03022526A3 *

Also Published As

Publication number Publication date
US6931900B2 (en) 2005-08-23
HUP0401734A2 (en) 2004-11-29
DE10143736C1 (de) 2002-08-22
JP2005500916A (ja) 2005-01-13
US20040168494A1 (en) 2004-09-02
WO2003022526A3 (fr) 2003-10-02
WO2003022526A2 (fr) 2003-03-20

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