EP0826461B1 - Schleifscheibe mit eingebauter Kühleinrichtung - Google Patents

Schleifscheibe mit eingebauter Kühleinrichtung Download PDF

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Publication number
EP0826461B1
EP0826461B1 EP97402012A EP97402012A EP0826461B1 EP 0826461 B1 EP0826461 B1 EP 0826461B1 EP 97402012 A EP97402012 A EP 97402012A EP 97402012 A EP97402012 A EP 97402012A EP 0826461 B1 EP0826461 B1 EP 0826461B1
Authority
EP
European Patent Office
Prior art keywords
grinding wheel
abrasive
distribution
drillings
wheel
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
EP97402012A
Other languages
English (en)
French (fr)
Other versions
EP0826461A1 (de
Inventor
Henri Jean Denis Robichon
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.)
Safran Aircraft Engines SAS
Original Assignee
Societe Nationale dEtude et de Construction de Moteurs dAviation SNECMA
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 Societe Nationale dEtude et de Construction de Moteurs dAviation SNECMA filed Critical Societe Nationale dEtude et de Construction de Moteurs dAviation SNECMA
Publication of EP0826461A1 publication Critical patent/EP0826461A1/de
Application granted granted Critical
Publication of EP0826461B1 publication Critical patent/EP0826461B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D5/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor
    • B24D5/10—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor with cooling provisions, e.g. with radial slots
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
    • B24D7/10—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor with cooling provisions

Definitions

  • the invention relates to grinding wheels used at the end of machining of generally metallic parts of the type defined in the preamble of claim 1, with the aim of obtaining parts with very precise dimensions and dimensions. It relates, in particular, to grinding at high speed and more particularly by means of grinders with cubic boron nitride, called “CBN grinders”.
  • Abrasive wheels are used in grinding to perform the last finishing passes, in order to put the surfaces to be machined to a very precise dimension and with a surface quality of optimal quality.
  • the machining surface of the grinding wheel is made up of a multitude of abrasive grains bonded and agglomerated by a binder. The machining surface is rotated and the grains gradually machine the surface. The movements of the grinding wheel and the shape of the surface determine the shape and quality of the final machined surface.
  • CBN grinding wheels are grinding wheels in which the abrasive material is cubic boron nitride, that is to say a “superabrasive" material, in contrast to aluminous abrasives and carbides of more conventional or conventional silicon.
  • a grinding wheel using this type of abrasive does not contain grains of this type throughout its mass, but generally consists of two parts which are a frame or a central support around which is placed an abrasive layer, commonly called “Banner”.
  • This strip is the active part of the grinding wheel and is generally not permeable, that is to say that there are no pores in this part. It is added that the frame may be made of a light alloy (AG5) or of a mixture of aluminum powders and resin, commonly called “resaloy”, of a dense alloy, for example bronze or steel, or of vitrified material.
  • AG5 light alloy
  • resin commonly called “resaloy”
  • the wheels with cubic boron nitride are used for work of rectification of steel or alloy parts whose surface hardness is largely above the average and in sharpening operations of tools of steel fast strongly alloy, or overcarburized steel.
  • grinding wheels of this type are used with very high rotational speeds, of the order of 15,000 to 30,000 revolutions / minute.
  • grinding wheels with incorporated sprinkling are used.
  • German patent document DE-A-38 04781 describes, by its figure 3, a grinding wheel with cubic boron nitride, whose abrasive profile is tapered, equipped with a watering circuit of the abrasive surface of the grinding wheel ending in multiple channels on this surface.
  • a watering circuit of the abrasive surface of the grinding wheel ending in multiple channels on this surface.
  • the circuit has radial holes which supply the abrasive surface with coolant.
  • making these holes is problematic because it requires delicate machining.
  • the homogeneity of the distribution of the liquid over the entire width of the abrasive surface is not ensured.
  • the object of the invention is to remedy these drawbacks.
  • the distribution bores open, for example in an inclined manner, each in an external rib formed in the abrasive deposit.
  • the ribs are preferably inclined relative to the central axis of the grinding wheel, the inclination of the ribs being preferably alternated.
  • Figure 1 shows all the elements of the grinding wheel according to the invention, that is to say mainly the body 1 which constitutes the largest part of the grinding wheel and the abrasive deposit 10 placed at the periphery thereof.
  • the peripheral surface 7 of the body 1 and the abrasive deposit 10 are shown with a cylindrical shape. This is only one of the many forms that these two elements can take, depending on the surface of the workpiece.
  • the body 1 has a central recess 5 by which it is fixed to a drive shaft. drive. It also has a central cavity 8 through which the coolant, in this case water mixed with oil, arrives.
  • a first solution consists in making this coolant arrive via the central recess 5, that is to say by the drive shaft.
  • Another solution consists in making the fluid arrive laterally by a lateral pipe 6 shown in broken lines.
  • the body 1 has two annular lateral chambers 2 of shallow depth and connected by central holes 4 to the central recess 5. These two lateral chambers 2, easily produced by turning, are each closed by a sealed cover 9 fixed to the body 1 without concentric adjustment problem. Thus, the spraying fluid arriving through the central recess 5 in the body 1 can enter the two annular lateral chambers 2.
  • Distribution holes 3 are provided in the body 1. They lead to both outside the annular lateral chambers 2 and on the peripheral surface 7 of the body 1, that is to say in the abrasive 10.
  • the distribution bores 3 have, at the top of this figure 1, have been shown opening out in the same section plane to show that several distribution bores can lead to the same generatrix of the peripheral surface 7 of the body 1. This is a possibility, but does not correspond with the embodiment mentioned at the bottom of this figure 1 (uncut).
  • the abrasive 10 may have external grooves 11 placed opposite the distribution holes 3. This allows the coolant to exit the grinding wheel, the abrasive 10 is not porous. Thus, the spraying fluid can reach the entire external surface 12 of the abrasive, that is to say the cutting surface of the grinding wheel, to perform its spraying and lubrication functions.
  • these distribution bores 3 are slightly inclined so that the fluid leaves in the direction opposite to the direction of rotation represented by the arrow.
  • the external grooves 11 are inclined relative to the axis of rotation A of the grinding wheel. This allows better distribution of the coolant over the entire width of the wheel.
  • the external grooves 11 are inclined alternately so that this distribution of the fluid is as uniform as possible.
  • a fixing flange 14 to symbolize the means for fixing the grinding wheel on the motor shaft.
  • the grinding wheel has been cut to show that the distribution holes 3 can lead into the grooves external 11, inclined relative to the radius of the grinding wheel, that is to say not perpendicular to the peripheral surface 7 of the body 1.
  • the grinding wheel according to the present invention makes it possible, of course, to eliminate the irrigation and lubrication nozzles and the problems of accessibility in the cutting zone and also the problems of positioning.
  • the distribution of the coolant by the grinding wheel eliminates the possibility of thermal shock linked to the delicate distribution of this coolant with a nozzle system, thus limiting the risks of local overheating of the grinding wheel. It also avoids the consumption of additional power on the drive spindle due to the impacts of the coolant on the grinding wheel.
  • the main advantage lies in the ease of production of the coolant distribution circuit, requiring no precise or delicate machining to be carried out, such as drilling very deep pipes of small diameters.
  • the double supply of coolant on each side of the grinding wheel ensures watering which is distributed evenly and which provides optimum and constant machining quality.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Claims (6)

  1. Schleifscheibe, die aufweist
    - einen scheibenförmigen Körper (1) mit einer Mittelachse (A),
    - eine Schleifschicht (10), die auf der Umfangsfläche (7) des Körpers (1) aufgeklebt ist,
    - einen in dem Körper (1) eingebauten Versorgungskreis mit Sprühfluid, der in der Schleifschicht (10) mündet, und zwar mittels mehrerer Verteilungsbohrungen (3), die jeweils in einer ringförmigen, seitlichen Kammer (2) und in der in der Schleifschicht (10) münden, um den Schneidbereich zu schmieren und die Schleifscheibe zu kühlen,
       dadurch gekennzeichnet,
       dass der Versorgungskreis mit Sprühfluid aufweist;
    - zwei ringförmige, seitliche Kammern(2),
    - mindestens zwei zentrale Bohrungen (4), die jeweils in einer zentralen Aussparung (5) und in einer ringförmigen, seitlichen Kammer (2) münden,
    - zwei dichte Deckel (9), die die ringförmigen, seitlichen Kammern (2) bedecken.
  2. Schleifscheibe nach Anspruch 1,
       dadurch gekennzeichnet,
       dass die Verteilungsbohrungen (3) jeweils in eine Außenrippe (11) münden, die in der Schleifschicht (10) ausgeführt sind.
  3. Schleifscheibe nach Anspruch 2,
       dadurch gekennzeichnet,
       dass die Außenrippen (11) zur Mittelachse (A) der Schleifscheibe geneigt sind.
  4. Schleifscheibe nach Anspruch 3,
       dadurch gekennzeichnet,
       dass die Außenrippen (11) entgegengesetzt geneigt sind.
  5. Schleifscheibe nach Anspruch 2,
       dadurch gekennzeichnet,
       dass die mehreren Verteilungsbohrungen (3) in der gleichen Außenrippe (11) münden.
  6. Schleifscheibe nach Anspruch 2,
       dadurch gekennzeichnet,
       dass die mehreren Verteilungsbohrungen (3) geneigt in den Außenrippen (11) münden.
EP97402012A 1996-08-29 1997-08-28 Schleifscheibe mit eingebauter Kühleinrichtung Expired - Lifetime EP0826461B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9610553 1996-08-29
FR9610553A FR2752762B1 (fr) 1996-08-29 1996-08-29 Meule de rectification avec arrosage incorpore

Publications (2)

Publication Number Publication Date
EP0826461A1 EP0826461A1 (de) 1998-03-04
EP0826461B1 true EP0826461B1 (de) 2001-09-19

Family

ID=9495275

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97402012A Expired - Lifetime EP0826461B1 (de) 1996-08-29 1997-08-28 Schleifscheibe mit eingebauter Kühleinrichtung

Country Status (5)

Country Link
US (1) US5846125A (de)
EP (1) EP0826461B1 (de)
CA (1) CA2213060C (de)
DE (1) DE69706789T2 (de)
FR (1) FR2752762B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005044496A1 (en) * 2003-11-07 2005-05-19 James Hardie International Finance B.V. A cutting tool

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FR2793181B1 (fr) 1999-05-06 2001-06-22 Snecma Meule de rectification et son systeme lateral de lubrification
AU2002248239A1 (en) * 2000-10-20 2002-08-06 Makino, Inc. Machining device for machining a surface of a workpiece and method therefore
US6739960B2 (en) * 2001-12-14 2004-05-25 United Technologies Corporation Turbine ported grinding wheels
AT413959B (de) * 2002-12-05 2006-07-15 Schrottner Gerhard Schleifscheibe
US7052379B2 (en) * 2002-12-27 2006-05-30 General Electric Company Methods and apparatus for machining a coupling
EP1486289A3 (de) * 2003-06-12 2005-03-09 Koyo Seiko Co., Ltd. Verfahren zum Schleifen der Wälzlagereinheit eines Rades
AT502503B1 (de) * 2003-09-04 2007-04-15 Schrottner Gerhard Ringsystem zur mediumsführung bei schleifscheiben
AT414105B (de) * 2003-09-04 2006-09-15 Schrottner Gerhard Abdeckung zur mediumsführung bei schleifscheiben
US20050064799A1 (en) * 2003-09-24 2005-03-24 Inland Diamond Products Company Ophthalmic roughing wheel
EP1533078B1 (de) * 2003-11-12 2008-04-30 Erwin Junker Grinding Technology a.s. Geteiltes Schleifwerkzeug
WO2005084889A1 (es) * 2004-03-10 2005-09-15 Cristales Instillables De Mexico, S.A. De C.V. Aparato para pulir el borde de una hoja de vidrio
US8151783B2 (en) * 2005-06-27 2012-04-10 Husqvarna Outdoor Products Inc. Tools and methods for making and using tools, blades and methods of making and using blades
US20080051013A1 (en) * 2006-04-05 2008-02-28 Burgess Greg M Methods and apparatus for machining a coupling
JP5034427B2 (ja) * 2006-10-12 2012-09-26 株式会社ジェイテクト 研削加工における研削液の動圧開放方法、その方法を利用した研削方法およびその研削方法に用いる砥石
WO2009094539A1 (en) * 2008-01-24 2009-07-30 Applied Materials, Inc. Solar panel edge deletion module
JP5167920B2 (ja) * 2008-04-11 2013-03-21 株式会社ジェイテクト 研削盤及び研削方法
ITPD20080237A1 (it) * 2008-07-31 2010-02-01 Adi S P A Mola, particolarmente per lavorazioni di molatura ad elevata velocit@ di avanzamento
US20110126961A1 (en) 2009-12-02 2011-06-02 Bridgestone Bandag, Llc Passive buffer brush air cooling
KR101415159B1 (ko) * 2010-12-06 2014-07-04 코마츠 엔티씨 가부시끼가이샤 연삭 숫돌
US8597079B2 (en) * 2011-01-07 2013-12-03 Inland Diamond Products Company Abrasive wheel with closed profiles in cutting surface
US20210323123A1 (en) * 2012-01-17 2021-10-21 Guilin Champion Union Diamond Co., Ltd. Manufacturing method for grinding wheel and grinding method for grinding workpiece using grinding wheel
WO2013107339A1 (zh) * 2012-01-17 2013-07-25 桂林创源金刚石有限公司 防失形高效切削砂轮
FI10500U1 (fi) * 2013-02-26 2014-05-27 Nurmeksen Työstö Ja Tarvike Oy Kivisaha
JP6209081B2 (ja) * 2013-12-25 2017-10-04 三菱重工工作機械株式会社 砥石工具
EP2929967B1 (de) * 2014-04-11 2017-02-01 Sandvik Intellectual Property AB Langlochfrässcheibe und drehbarer Aufnahmeschaft für eine solche Frässcheibe
US20180117726A1 (en) * 2015-03-25 2018-05-03 Ancora S.P.A. Head for polishing ceramic items or natural stones
EP3600771B1 (de) * 2017-03-31 2022-03-30 B & J Rocket Sales AG Verbessertes schleifrad
JP6817161B2 (ja) * 2017-07-07 2021-01-20 三菱重工業株式会社 研削砥石及び研削砥石の製造方法
AT520966A1 (de) * 2018-03-12 2019-09-15 Tyrolit Schleifmittelwerke Swarovski Kg Schleifwerkzeug zum Schleifen eines Motorblocks
CN108326764A (zh) * 2018-05-03 2018-07-27 西安增材制造国家研究院有限公司 表面电镀磨料内喷润滑液砂轮及包括该砂轮的磨削装置
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WO2005044496A1 (en) * 2003-11-07 2005-05-19 James Hardie International Finance B.V. A cutting tool
US7497153B2 (en) 2003-11-07 2009-03-03 James Hardie International Finance B.V. Cutting tool and method of use

Also Published As

Publication number Publication date
DE69706789T2 (de) 2002-05-23
CA2213060A1 (fr) 1998-02-28
FR2752762B1 (fr) 1998-10-02
CA2213060C (fr) 2005-11-08
FR2752762A1 (fr) 1998-03-06
DE69706789D1 (de) 2001-10-25
US5846125A (en) 1998-12-08
EP0826461A1 (de) 1998-03-04

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