EP1180068B1 - Verfahren und vorrichtung zum kantenverrunden - Google Patents

Verfahren und vorrichtung zum kantenverrunden Download PDF

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Publication number
EP1180068B1
EP1180068B1 EP00987051A EP00987051A EP1180068B1 EP 1180068 B1 EP1180068 B1 EP 1180068B1 EP 00987051 A EP00987051 A EP 00987051A EP 00987051 A EP00987051 A EP 00987051A EP 1180068 B1 EP1180068 B1 EP 1180068B1
Authority
EP
European Patent Office
Prior art keywords
edge
rounded
fluid
erosive
edges
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
EP00987051A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1180068A2 (de
Inventor
Matthias Thiem
Johannes Amon
Gerhard Schlereth
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 EP1180068A2 publication Critical patent/EP1180068A2/de
Application granted granted Critical
Publication of EP1180068B1 publication Critical patent/EP1180068B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • 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
    • B24C3/327—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 by an axially-moving flow of abrasive particles without passing a blast gun, impeller or the like along the internal surface

Definitions

  • the invention relates to a method and a device for rounding edges according to the preamble of the independent claim 4.
  • microbores are required with defined hydraulic properties, for example, to keep the dispersion of the performance of mass-produced injectors as small as possible.
  • the invention has for its object to provide a method by which macroscopic edges can be rounded even in inaccessible places with great repeatability, high material removal rate and at low cost.
  • This method has the advantage that it is possible to round off any edges that may be present at any point of components, even with complicated geometry.
  • the expenditure on equipment is manageable, the processing time is low and the quality of the rounding high. Furthermore arise only small costs.
  • a continuous quantity measurement of the erosive liquid By a continuous quantity measurement of the erosive liquid, a high process reliability is achieved.
  • the material removal at edges due to the usually increased flow velocity, greatest, so that at the other sites acted upon by the erosive fluid, no or only a very small material removal takes place.
  • the flow behavior of the erosive liquid corresponds to flow through components such.
  • the flow velocity of the liquid in the region of the edge to be rounded relative to the average flow velocity of the liquid is increased, so that a particularly large material removal is achieved in the region of the edge to be rounded.
  • a body is introduced into the liquid whose surface forms a gap with the edge to be rounded, so that the flow velocity of the liquid in the region of the edge to be healed is further increased compared to the average flow velocity of the liquid and thus the material removal.
  • the flow direction of the liquid and the longitudinal axis of the edge to be rounded at an angle, in particular of 90 °, include, so that the material removal is further intensified.
  • a device with a delivery pump for the erosive fluid and with a hydraulic connection between the delivery pump and the component, the edge of which is to be rounded, by forming a gap with the edge to be rounded is present, so that the flow velocity of the erosive liquid in the region of the edge to be rounded relative to the average flow velocity of the erosive liquid increases and thus the rounding of the edge is accelerated.
  • a body forming a gap with the edge to be rounded is present, so that the flow velocity of the erosive liquid in the region of the edge to be rounded is increased compared to the average flow velocity of the erosive liquid and thus the edge rounding is accelerated.
  • a collecting device for collecting the liquid is present, so that the erosive liquid does not escape into the environment.
  • the erosive fluid is circulated, so that their consumption is reduced.
  • a high-pressure fuel storage 1 according to the prior art is shown in partial longitudinal section.
  • the high-pressure fuel storage 1 has one or more connecting pieces 2, of which in Fig. 1, only one is shown.
  • a fastening tab 3 is visible.
  • the connecting piece 2 has a bore 4, which connects the connecting piece 2 with the storage space 5 hydraulically.
  • An edge 6, which results from the intersection between bore 4 and storage space 5 high mechanical stresses occur during operation, which can result in breaks.
  • a tried and tested means to reduce these stresses is to round off the edge 6. Due to the geometric conditions, this is the case with countersinks or the like. not or only conditionally possible. In any case, high costs arise.
  • the rounding can be simple, effective, inexpensive and fast with cycle times of 20 s to 200 s.
  • a hydraulic connection is made with a delivery pump (also not shown).
  • the feed pump delivers an erosive liquid into the high-pressure fuel storage 1, which is discharged through the bore 4.
  • the flow velocity of the liquid increases due to the cross-sectional constriction. Due to the high flow rate of the liquid, the edge 6 is rounded by the erosive liquid.
  • the material removal at sharp edges is greater than at blunt edges or surfaces.
  • the flow rate and thus also the material removal can be influenced.
  • delivery pressures between 50 bar and 140 bar have been found suitable.
  • FIG. 2 shows a cross section of a further embodiment of a high-pressure fuel accumulator 1.
  • the connecting piece 2 has an internal thread 8 with which a high-pressure line, not shown, can be screwed.
  • the edge 5 Since the bore 4 does not open vertically into the storage space 5, the edge 5, viewed over the circumference of the bore 4, does not always have the same sharpness. At point 9, it is the sharpest, while at point 10 it is much duller. After rounding the high-pressure fuel storage 1 was cut in the plane A - A and examined. It has been shown that the edge 6 was rounded most at the point 9, while the material removal at the point 10 was lower.
  • FIG. 3 shows the result of a measurement of the rounding in the plane A - A at the sharp-edged point 9. Shown in this diagram, the rounding contour of the sharp-edged point 9 in Fig. 2 (Y-axis) on the direction of movement of the probe (X- Axis).
  • the radius of curvature R is 0.782 mm.
  • FIG. 4 shows an injection nozzle 11 for a fuel injection system with a conical blind hole 12. Via an injection hole 13, the fuel, not shown, passes from the blind hole 12 in the combustion chamber, also not shown.
  • the conical blind hole 12 is followed by a frusto-conical Nozzle needle seat 14 on.
  • edge 16 On the left side of FIG. 4, a transition between blind hole 12 and nozzle needle seat 14 according to the prior art is shown as edge 16. This edge 16 is formed when grinding the nozzle needle seat 14. Depending on the type of processing, the edge 16 may be a sharp burr or a smooth edge.
  • a transition 17 according to the invention rounded between blind hole 12 and nozzle needle seat 14 is shown.
  • an erosive liquid from the nozzle needle seat 14 is conveyed through the injection hole 13.
  • a body 15, which consists for example of ceramic and whose geometry substantially corresponds to a nozzle needle, is introduced into the injection nozzle 11 during rounding.
  • the flow velocity of the unillustrated erosive fluid is highest in the region of the edge 16 and the rounded transition 17, respectively.
  • most of the material is eroded there and therefore especially a rounding brought about there.
  • edges of any kind can be used on outer contours or inner contours are rounded by means of a body 15 when the flow velocity in the region of the edges 5 or 16 is sufficiently high. Since the flow rate of the liquid is only in the range of. Edge 5 or 16 must be high, the removal of erosive fluid at the other points of the workpiece and the pump and other facilities is very low. This prolongs their life.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Prostheses (AREA)
  • Photosensitive Polymer And Photoresist Processing (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Complex Calculations (AREA)
EP00987051A 1999-11-04 2000-11-01 Verfahren und vorrichtung zum kantenverrunden Expired - Lifetime EP1180068B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19953131 1999-11-04
DE19953131A DE19953131A1 (de) 1999-11-04 1999-11-04 Verfahren und Vorrichtung zum Kantenverrunden
PCT/DE2000/003832 WO2001032358A2 (de) 1999-11-04 2000-11-01 Verfahren und vorrichtung zum kantenverrunden

Publications (2)

Publication Number Publication Date
EP1180068A2 EP1180068A2 (de) 2002-02-20
EP1180068B1 true EP1180068B1 (de) 2006-06-21

Family

ID=7927933

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00987051A Expired - Lifetime EP1180068B1 (de) 1999-11-04 2000-11-01 Verfahren und vorrichtung zum kantenverrunden

Country Status (7)

Country Link
US (1) US6540589B1 (cs)
EP (1) EP1180068B1 (cs)
JP (1) JP2003512939A (cs)
BR (1) BR0007298B1 (cs)
CZ (1) CZ302534B6 (cs)
DE (2) DE19953131A1 (cs)
WO (1) WO2001032358A2 (cs)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6450042B1 (en) * 2000-03-02 2002-09-17 Micro Motion, Inc. Apparatus for and a method of fabricating a coriolis flowmeter formed primarily of plastic
DE10226799A1 (de) * 2002-06-15 2004-01-08 Robert Bosch Gmbh Kraftstoffeinspritzsystem
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
DE10230170B3 (de) * 2002-07-04 2004-03-04 Siemens Ag Verfahren und Vorrichtung zum hydro-erosiven Verrunden einer Kante eines Bauteils
DE10260302A1 (de) * 2002-12-20 2004-07-15 Siemens Ag Verfahren zum Bearbeiten einer Kante eines hochdruckfesten Bauteils , insbesondere zum hydro-erosiven Verrunden einer Kante sowie und Vorrichtung hierzu
DE10353168A1 (de) * 2003-11-14 2005-06-23 Robert Bosch Gmbh Verfahren und Vorrichtung zum hydroerosiven Verrunden von Bohrungsübergängen
DE102012001926A1 (de) * 2012-02-02 2013-08-08 Benteler Automobiltechnik Gmbh Kraftstoffverteilerleiste
DE102013113030A1 (de) 2013-03-28 2014-10-02 Freiberger Compound Materials Gmbh Verfahren zur Kantenverrundung von Halbleiter-Wafern

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4005549A (en) * 1975-07-28 1977-02-01 Dynetics Corporation Abrasive flow machining method and tooling
JPS6031628B2 (ja) * 1981-08-28 1985-07-23 株式会社神戸製鋼所 パイプの内面研掃装置
US5125191A (en) * 1982-09-08 1992-06-30 Extrude Hone Corporation Abrasive flow machining with an in situ viscous plastic medium
DD294891A5 (de) * 1990-06-05 1991-10-17 Maschinenfabrik Sangershausen Gmbh,De Vorrichtung zum entgraten von kleinen bohrungen
EP1300456B1 (en) * 1995-08-04 2006-11-29 Dynetics LLC Abrasive liquid slurry
US5964644A (en) * 1996-03-01 1999-10-12 Extrude Hone Corporation Abrasive jet stream polishing
JPH10337649A (ja) * 1997-06-05 1998-12-22 Nissan Motor Co Ltd 砥粒流動体を用いたインジェクタノズルの加工方法及びその装置
US6273787B1 (en) * 1998-08-26 2001-08-14 Extrude Hone Corp Abrasive polishing method, apparatus and composition
US6086459A (en) * 1999-04-07 2000-07-11 Fraisa Sa Device for deburring edges on an object
US6227942B1 (en) * 1999-04-21 2001-05-08 H-Semitran Llc Ferrofluidic finishing

Also Published As

Publication number Publication date
CZ20012442A3 (cs) 2002-05-15
US6540589B1 (en) 2003-04-01
WO2001032358A2 (de) 2001-05-10
CZ302534B6 (cs) 2011-07-07
JP2003512939A (ja) 2003-04-08
DE50013056D1 (de) 2006-08-03
WO2001032358A3 (de) 2001-11-22
BR0007298A (pt) 2001-10-16
EP1180068A2 (de) 2002-02-20
DE19953131A1 (de) 2001-08-02
BR0007298B1 (pt) 2013-02-05

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