EP1572420B1 - Procedes d'usinage d'une arete d'un composant resistant aux pressions elevees, notamment procedes d'arrondissage hydro-erosif d'une arete, et dispositif correspondant - Google Patents

Procedes d'usinage d'une arete d'un composant resistant aux pressions elevees, notamment procedes d'arrondissage hydro-erosif d'une arete, et dispositif correspondant Download PDF

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Publication number
EP1572420B1
EP1572420B1 EP03788869A EP03788869A EP1572420B1 EP 1572420 B1 EP1572420 B1 EP 1572420B1 EP 03788869 A EP03788869 A EP 03788869A EP 03788869 A EP03788869 A EP 03788869A EP 1572420 B1 EP1572420 B1 EP 1572420B1
Authority
EP
European Patent Office
Prior art keywords
edge
bore
high pressure
rounding
hydro
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.)
Expired - Lifetime
Application number
EP03788869A
Other languages
German (de)
English (en)
Other versions
EP1572420B8 (fr
EP1572420A2 (fr
Inventor
Harald Schmidt
Stephan Aurich
Christoph Hamann
Maximilian Kronberger
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.)
Aumovio Germany GmbH
Original Assignee
Aumovio Germany 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 Aumovio Germany GmbH filed Critical Aumovio Germany GmbH
Publication of EP1572420A2 publication Critical patent/EP1572420A2/fr
Application granted granted Critical
Publication of EP1572420B1 publication Critical patent/EP1572420B1/fr
Publication of EP1572420B8 publication Critical patent/EP1572420B8/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B39/00—Burnishing machines or devices, i.e. requiring pressure members for compacting the surface zone; Accessories therefor
    • B24B39/02—Burnishing machines or devices, i.e. requiring pressure members for compacting the surface zone; Accessories therefor designed for working internal surfaces of revolution
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
    • B24B31/10—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving other means for tumbling of work
    • B24B31/116—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving other means for tumbling of work using plastically deformable grinding compound, moved relatively to the workpiece under the influence of pressure
    • 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
    • Y10T29/49405—Valve or choke making
    • 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
    • Y10T29/49405—Valve or choke making
    • Y10T29/49409—Valve seat forming
    • 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
    • Y10T29/49405—Valve or choke making
    • Y10T29/49412—Valve or choke making with assembly, disassembly or composite article making
    • Y10T29/49416—Valve or choke making with assembly, disassembly or composite article making with material shaping or cutting
    • Y10T29/49419—Valve or choke making with assembly, disassembly or composite article making with material shaping or cutting including machining or drilling

Definitions

  • the invention relates to a method for processing an edge of a high-pressure-resistant component, in particular an edge of a bore intersection of a high-pressure-resistant component of a fuel injection system, in which the edge is rounded hydro-erosive in a processing step.
  • the invention also relates to a method for the hydroerosive rounding of an edge of a high-pressure-resistant component, in particular an edge of a bore intersection of a high pressure-resistant component of a fuel injection system, in which an offset with abrasive particles fluid across the edge to be rounded in the region of a first continuing bore to a branching second bore is performed.
  • Another method of edge rounding well known in the art is to use an electrochemical material removal process.
  • the edge in the area of the intersected holes is rounded.
  • the disadvantage here is especially the occurring pore-like rough surface and the corrosive damage to the grain boundaries of the material, which lead to voltage peaks in the microscopic range.
  • the achievable pressure increase in this method is lower than the Extrudehone method.
  • the flow velocity of the liquid and thus also the material removal in the region of the edge can be influenced.
  • the delivery pressures are approximately in the range of 50 bar to 140 bar.
  • the main flow direction of the liquid and the longitudinal axis of the edge to be rounded preferably enclose an angle of 90 °.
  • the present invention has for its object to provide a method for processing an edge of a high pressure resistant component, in particular an edge of a bore intersection of a high-pressure resistant component of a fuel injection system, with each of which an optimization of the rounding result and thus an optimization of the high pressure resistance of the component is achieved.
  • a further improvement in the high-pressure resistance of the component is achieved in that before the Processing step of the hydro-erosive Verlaken the edge and adjacent to the edge surfaces of the high-pressure-resistant component are each set in the region of their surface by means of a grinding and / or honing process under compressive stresses. As a result of grinding and / or honing, a more or less pronounced burr is formed at the edge.
  • the gist of the present invention resides in the combination of the grinding and / or honing operation for producing compressive stresses in the edge and the adjacent surface of the high pressure resistant Component with the subsequent processing step of hydroerosiven rounding.
  • the desired degree of rounding corresponds to the optimum strength.
  • the compressive stresses generated in the edge and in the adjacent surface of the high-pressure-resistant component are advantageously the tensile stresses caused by the under high pressure standing fuel can be generated, directed in opposite directions.
  • the hydro-erosive rounding of the edge deburrs and smooths the edge, defusing the typical three-axis stress state for burrs and sharp edges.
  • the edge and the edge adjacent surfaces preferably cylindrical surfaces of holes, the high-pressure component in each case in the region of its surface by means of the grinding and / or honing process under compressive stresses in a range of 500 N / mm2 set to 1500 N / mm2.
  • the edge is rounded only to the extent that a maximum of 10 ⁇ m to 50 ⁇ m is removed so that compressive stresses of at least 200 N / mm 2 are maintained. This roughly corresponds to rounding radii of 30 ⁇ m to 170 ⁇ m.
  • a closure element is inserted into the continuing first bore in the main flow direction of the fluid mixed with abrasive bodies behind the branching second bore at a distance of approximately 0.5 mm to 10 mm.
  • a further improvement of the rounding result is achieved by changing the main direction of flow of the abrasive-added liquid in the first bore at least once, preferably several times.
  • the main flow direction is reversed and thus the inflow edge to the counter edge and the counter edge to the inflow edge.
  • any existing differences in the roundness levels at the counter edge and at the inflow edge can be compensated.
  • FIGURE shows a schematic sectional view of a section of a high-pressure resistant component 1 of a fuel injection system, such as an injection nozzle, an injector body, a Schmiederails, a welding rail, a displacer unit of a common rail high pressure pump or the high pressure region of a common rail high pressure pump.
  • a fuel injection system such as an injection nozzle, an injector body, a Schmiederails, a welding rail, a displacer unit of a common rail high pressure pump or the high pressure region of a common rail high pressure pump.
  • the component 1 has a main channel and a branch channel, which are formed in the form of a first cylindrical bore 2 and a second cylindrical bore 3.
  • the second bore 3 branches off in the region of the inner wall 4 of the first bore 2 from the first bore 2.
  • a peripheral edge 5 is formed in the component 1, which is sharp-edged after production of the holes 2 and 3.
  • the longitudinal axes L, 1 of the two holes 2 and 3 extend in the illustrated preferred embodiment at a right angle to each other and the resulting branching area is T-shaped.
  • the inner walls 4, 6 and the edge 5 are reworked by a grinding process or honing process.
  • compressive stresses are introduced into the surfaces of the inner walls 4, 6 and the edge 5, which are directed counter to the fluid, in particular fuel, which is guided later in the bores 2, 3 under high pressure.
  • These compressive stresses have in the region of the surface of the inner walls 4, 6 values up to 1000 N / mm 2 ; in a depth of about 0.1 mm below the surface of the inner walls 4, 6, these compressive stresses are still at 700 N / mm 2 .
  • the edge 5 is rounded hydro-erosively to increase the high-pressure resistance of the component 1.
  • an offset with grinding wheels 7 liquid 8 preferably a highly viscous lubricating oil, introduced by means of a feed pump, not shown in the first bore 2 and guided across the edge 5 to be rounded.
  • transverse is meant here any flow at an angle to the peripheral edge.
  • this ensures that the portion of the edge 5, which faces away from the inlet of the liquid 8 with the grinding bodies 7 or facing the closing element 9 - referred to below as the counter edge 11 - has a more advantageous flow around than without the closure element 9. Accordingly, good rounding results are achieved.
  • the designated as the inflow edge 10 portion of the edge 5, which faces the inlet of the liquid 8 with the grinding wheels 7 and the end element 9 is still sufficiently rounded.
  • the maximum removal of material by the hydro-erosive rounding is in the range of 10 ⁇ m to 50 ⁇ m, preferably 20 ⁇ m to 40 ⁇ m.
  • an increase in the flow velocity is associated with an increase in the erosive effect of the liquid 8 mixed with the abrasive bodies 7.
  • the hydro-erosive Ver round is carried out at pressures in the range of about 10 bar to 500 bar.
  • the bore 2 has a diameter D which is slightly larger than the diameter d of the branching bore 3.
  • the diameter D, d of the holes are in the usual manner in a range of 0.5 mm to 10 mm, preferably in the range of about 2 mm to 4 mm.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fuel-Injection Apparatus (AREA)

Claims (6)

  1. Procédé d'usinage d'une arête d'une pièce résistante aux pressions élevées, en particulier d'une arête d'une intersection entre des perçages dans une pièce résistante aux pressions élevées d'un dispositif d'injection de carburant, dans lequel procédé l'arête est arrondie par hydro-érosion au cours d'une étape d'usinage,
    caractérisé en ce que,
    avant l'étape d'usinage par hydro-érosion de l'arrondi, l'arête (5) et les surfaces (4, 6) adjacentes à l'arête (5) de la pièce (1) résistante aux pressions élevées sont soumises respectivement à des contraintes de pression dans la zone de leur surface au moyen d'un procédé de meulage et/ou de rodage.
  2. Procédé selon la revendication 1,
    caractérisé en ce que l'arête (5) et les surfaces (4, 6) adjacentes à l'arête (5), de préférence des surfaces cylindriques des perçages (2, 3), de la pièce (1) résistante aux pressions élevées sont soumises dans la zone de leur surface respectivement à des contraintes de pression dans une plage de 500 N/mm2 à 1 500 N/mm2, au moyen du procédé de meulage et/ou de rodage.
  3. Procédé selon la revendication 1 ou 2,
    caractérisé en ce que l'arête (5) est arrondie au cours de l'étape d'arrondissage par hydro-érosion et, de ce fait, l'enlèvement de matière se situe au maximum dans une plage de 10 µm à 50 µm.
  4. Procédé d'arrondissage par hydro-érosion d'une arête d'une pièce résistante aux pressions élevées, en particulier d'une arête d'une intersection entre des perçages dans une pièce résistante aux pressions élevées d'un dispositif d'injection de carburant, dans lequel procédé un liquide chargé de particules abrasives est guidé transversalement sur l'arête à arrondir dans une zone d'un premier perçage continu bifurquant dans un deuxième perçage de dérivation, étant utilisé comme procédé selon les revendications 1 à 3,
    caractérisé en ce que pour faire varier la direction du liquide (8) chargé de particules abrasives (7) depuis le premier perçage (2) continu vers le deuxième perçage (3) de dérivation, le premier perçage (2) est obturé par un élément d'obturation (9) en aval du deuxième perçage (3) de dérivation, par référence à la direction d'écoulement principale du liquide (8) chargé de particules abrasives (7).
  5. Procédé selon la revendication 4,
    caractérisé en ce que le premier perçage (2) continu est obturé par un élément d'obturation (9) à une distance (a) d'environ 0,5 mm à 10 mm par rapport à l'arête (5), en aval du deuxième perçage (3) de dérivation, par référence à la direction d'écoulement principale du liquide (8) chargé de particules abrasives (7).
  6. Procédé selon la revendication 4 ou 5,
    caractérisé en ce que l'on fait varier au moins une fois, de préférence plusieurs fois, la direction d'écoulement principale (S) du liquide (8) chargé de particules abrasives (7) dans le premier perçage (2), et, de manière correspondante, on change la position de l'élément d'obturation (9).
EP03788869A 2002-12-20 2003-12-10 Procedes d'usinage d'une arete d'un composant resistant aux pressions elevees, notamment procedes d'arrondissage hydro-erosif d'une arete, et dispositif correspondant Expired - Lifetime EP1572420B8 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10260302A DE10260302A1 (de) 2002-12-20 2002-12-20 Verfahren zum Bearbeiten einer Kante eines hochdruckfesten Bauteils , insbesondere zum hydro-erosiven Verrunden einer Kante sowie und Vorrichtung hierzu
DE10260302 2002-12-20
PCT/DE2003/004063 WO2004056530A2 (fr) 2002-12-20 2003-12-10 Procedes d'usinage d'une arete d'un composant resistant aux pressions elevees, notamment procedes d'arrondissage hydro-erosif d'une arete, et dispositif correspondant

Publications (3)

Publication Number Publication Date
EP1572420A2 EP1572420A2 (fr) 2005-09-14
EP1572420B1 true EP1572420B1 (fr) 2008-02-27
EP1572420B8 EP1572420B8 (fr) 2008-05-07

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP03788869A Expired - Lifetime EP1572420B8 (fr) 2002-12-20 2003-12-10 Procedes d'usinage d'une arete d'un composant resistant aux pressions elevees, notamment procedes d'arrondissage hydro-erosif d'une arete, et dispositif correspondant

Country Status (5)

Country Link
US (1) US7637800B2 (fr)
EP (1) EP1572420B8 (fr)
JP (1) JP2006509644A (fr)
DE (2) DE10260302A1 (fr)
WO (1) WO2004056530A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010007704A1 (de) 2010-02-11 2011-08-11 Daimler AG, 70327 Vorrichtung zum Bearbeiten eines rotationssymmetrischen Hohlraumes eines druckfesten Bauteiles

Families Citing this family (7)

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Publication number Priority date Publication date Assignee Title
DE102005026511A1 (de) * 2005-06-09 2006-12-14 Robert Bosch Gmbh Ventil, insbesondere zur Verwendung als Saugventil auf der Saugseite von Kraftstoffeinspritzsystemen
JP4484227B2 (ja) * 2006-10-02 2010-06-16 ボッシュ株式会社 コモンレール
US8187056B2 (en) * 2006-12-14 2012-05-29 Flow International Corporation Process and apparatus for surface-finishing
US9676045B2 (en) 2011-02-28 2017-06-13 Corning Optical Communications Rf Llc Electrodes, components, apparatuses, and methods for burr-free or substantially burr-free electrochemical machining
DE102015009153A1 (de) * 2015-07-14 2017-01-19 Liebherr-Aerospace Lindenberg Gmbh Herstellungsverfahren eines Leitungsbauteils
US10646977B2 (en) 2016-06-17 2020-05-12 United Technologies Corporation Abrasive flow machining method
WO2025144796A1 (fr) * 2023-12-26 2025-07-03 Vaya Space, Inc. Procédé et appareil de finition d'écoulement abrasif à basse pression

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US5054247A (en) * 1986-03-21 1991-10-08 Extrude Hone Corporation Method of controlling flow resistance in fluid orifice manufacture
US5076027A (en) * 1987-12-17 1991-12-31 Extrude Hone Corporation Process for abrasive flow machining using multiple cylinders
US5195276A (en) * 1991-02-15 1993-03-23 Outboard Marine Corporation Apparatus and method for flushing a casting
DE19757117A1 (de) * 1997-12-20 1999-06-24 Bosch Gmbh Robert Verfahren zur Herstellung eines Ventilsitzkörpers für ein Brennstoffeinspritzventil und Brennstoffeinspritzventil
DE19902423A1 (de) * 1999-01-22 2000-08-03 Bosch Gmbh Robert Vorrichtung und Verfahren zur Bearbeitung einer Innenoberfläche
DE19953131A1 (de) * 1999-11-04 2001-08-02 Bosch Gmbh Robert Verfahren und Vorrichtung zum Kantenverrunden
US6503126B1 (en) * 2000-09-12 2003-01-07 Extrude Hone Corporation Method and apparatus for abrading the region of intersection between a branch outlet and a passageway in a body
JP2002103200A (ja) * 2000-09-28 2002-04-09 Tooyoo:Kk ホーニング工具
US6739956B2 (en) * 2001-10-30 2004-05-25 Valiant Corporation Apparatus for cleaning engine block passages
JP3681714B2 (ja) * 2002-06-18 2005-08-10 株式会社不二精機製造所 部材内部の長孔交差部のブラスト加工方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010007704A1 (de) 2010-02-11 2011-08-11 Daimler AG, 70327 Vorrichtung zum Bearbeiten eines rotationssymmetrischen Hohlraumes eines druckfesten Bauteiles

Also Published As

Publication number Publication date
EP1572420B8 (fr) 2008-05-07
JP2006509644A (ja) 2006-03-23
WO2004056530A3 (fr) 2004-08-26
DE50309277D1 (de) 2008-04-10
US20060010688A1 (en) 2006-01-19
US7637800B2 (en) 2009-12-29
WO2004056530A2 (fr) 2004-07-08
WO2004056530A8 (fr) 2004-10-21
EP1572420A2 (fr) 2005-09-14
DE10260302A1 (de) 2004-07-15

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