EP0922533B1 - Molette de dressage pour meules de rectification - Google Patents

Molette de dressage pour meules de rectification Download PDF

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Publication number
EP0922533B1
EP0922533B1 EP98120879A EP98120879A EP0922533B1 EP 0922533 B1 EP0922533 B1 EP 0922533B1 EP 98120879 A EP98120879 A EP 98120879A EP 98120879 A EP98120879 A EP 98120879A EP 0922533 B1 EP0922533 B1 EP 0922533B1
Authority
EP
European Patent Office
Prior art keywords
disk
dressing roll
slots
conical
diamonds
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
EP98120879A
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German (de)
English (en)
Other versions
EP0922533A2 (fr
EP0922533A3 (fr
Inventor
Walter Peters
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.)
Saint Gobain Diamantwerkzeuge GmbH and Co KG
Original Assignee
Saint Gobain Winter Diamantwerkzeuge GmbH and Co KG
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 Saint Gobain Winter Diamantwerkzeuge GmbH and Co KG filed Critical Saint Gobain Winter Diamantwerkzeuge GmbH and Co KG
Publication of EP0922533A2 publication Critical patent/EP0922533A2/fr
Publication of EP0922533A3 publication Critical patent/EP0922533A3/fr
Application granted granted Critical
Publication of EP0922533B1 publication Critical patent/EP0922533B1/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
    • B24B53/00—Devices or means for dressing or conditioning abrasive surfaces
    • B24B53/12—Dressing tools; Holders therefor
    • B24B53/14—Dressing tools equipped with rotary rollers or cutters; Holders therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for

Definitions

  • the invention relates to a dressing roller for grinding wheels according to the claim 1.
  • dressing is the fine machining of a rotating grinding wheel Roger that.
  • the purpose is to manufacture or restore the surface geometry and / or the grinding ability of the coating of the grinding body or tool.
  • Grinding tools the coating of which has hard material grains or CBN (boron nitrite) grains, are mostly machined with diamond-coated dressing tools.
  • CBN boron nitrite
  • Document EP0116668A also describes such a dressing roller for grinding wheels a circular disk and at least one support disk made of a rigid material on at least one side of the disc, the outer radius of which approximates the outer Radius of the disc corresponds.
  • a disadvantage of such dressing rollers is that the minimum radius that can be achieved is relatively large. It is therefore difficult to dress grinding wheel profiles with small radii satisfactorily. In principle, this could also be done with a single diamond become. However, single diamonds wear out relatively quickly. The frequent replacement the single diamond in the body causes a lot of time.
  • gear wheels are not made with precisely dressed grinding wheel geometries the required geometric shape is ground on the gear profile not reached. Additional vibrations can develop, the unwanted Noise in the gearbox can cause teeth to break.
  • the grinding achievable precision naturally depends on the precise grinding surface and this in turn from a suitable dressing tool.
  • the invention has for its object a dressing roller containing diamonds to create, in particular for dressing CBN grinding wheels that have a high Tool life is suitable for working very small radii and with the Covering surfaces can be precisely finished.
  • the dressing roller according to the invention consists of at least three parts, namely a circular disk, which has radial receiving slots on the circumference, elongated diamonds that are received in the receiving slots and at least one support disc on at least one side of the receiving disc.
  • Monocrystalline (MKD) or polycrystalline (PKD) diamonds come as diamonds into consideration, which are then inserted into the receiving slots.
  • the Diamonds are designed to be pinched by the slots be included.
  • the dimensions of the diamonds are one certain tolerance range. By appropriate selection it is achieved that of the receiving slots can be received by clamping. Better adaptation to that Tolerances of the diamonds can be obtained by dividing them into Clearances on the circumference of the disks between adjacent receiving slots radial compensation slots are formed, which with an excess of diamonds allow the intermediate segments to yield. With the help of the compensation slots the occurring tolerances e.g. with rod-shaped Diamonds to be caught.
  • the attachment of Holes in the area of the compensation slots which receive screws with which the segments adjacent to the compensation slot move more or less apart can be used to generate a clamping force on the in the receiving slots inserted diamond.
  • the diamonds are cut at the outer end so that a predetermined one Geometry, e.g. Radius can be obtained. So that a small radius is used , it is advantageous if the support disc is close to the diamond in axial Direction has only very small dimensions, preferably is conical, so that a very acute angle can be obtained. With the help of such Dressing roller it is therefore possible to dress predetermined radii on grinding tools.
  • Geometry e.g. Radius
  • the diamonds are mechanically attached, so they can be replaced if this is necessary.
  • Through a variety of single diamonds on the scope of the Dressing rollers increase the service life compared to e.g. a single diamond significantly.
  • the lifespan of the dressing roller can be reground frequently extend.
  • the dressing roller Due to the structure of the dressing roller (modular structure of the individual parts) produce the dressing rolls reproducibly and precisely.
  • the individual parts can be prefabricated become.
  • the individual diamonds are mechanically in the receiving slots curious; excited.
  • One embodiment provides for improvement of the uniform clamping the invention that the receiving slots extended radially inward Have sections whose width is preferably less than that of the receiving slots, whereby bendable between the receiving slots in the plane of the disc Segments are formed.
  • the segments are preferably shaped so that in the event of a bend, the surfaces of the receiving slots, each of which is a diamond clamp, be moved approximately parallel to yourself, so that independent an approximately flat clamping is guaranteed by the degree of clamping.
  • a better bendability is obtained if the inner ends of the elongated Slit sections open into a hole.
  • the elongated slot sections extended slot areas can be provided. In this e.g. the top of one Screwdriver are inserted to bend the adjacent segments apart. This enables a diamond to be removed and inserted.
  • the support disks are preferably tapered at the edge, preferably with a very small angle on the circumference.
  • the support disks preferably consist of a hard material that can be ground together with the diamonds. The Grinding the diamonds requires a special grinding surface, e.g. for support washers steel would smear the material.
  • a hard metal, Cermet, ceramics or a steel coated with a hard material Preferably a hard metal, Cermet, ceramics or a steel coated with a hard material. This material also has the advantage of being subjected to a corresponding load Diamonds to be flexurally stable.
  • the receiving disc and the at least one support disc are axially against each other clamped, preferably by a suitable screw connection. Because of the Thickness of diamonds also tolerances, it is advantageous if after an embodiment of the invention, a leveling layer between the receiving disc and the support disc is provided.
  • the compensation layer can be made of plastic, a casting alloy, a solder alloy pulp, galvanically deposited Metal or the like exist. Become two or more recording disks A compensating layer can be clamped between two almost identical supporting discs can also be arranged between the receiving disks. Furthermore can be used when using two or more washers with the same pitch there is an axial alignment of the diamonds to each other or an offset in the circumferential direction.
  • the Invention shaped the receiving disc in the radially outer region as a conical disc be supported on one side by a complementarily shaped support disk.
  • precise flat coverings can be made Process CBN discs or the like.
  • the diamonds are in thickness preferably slightly larger than the thickness of the tapered section so that it is in the Cone surface level come into effect.
  • Two or more diamonds can also be arranged in the radial direction. She are either placed in a row in a common slot or in each with its own slots, in the latter case the diamonds being radial to one another are staggered. It can be on a different pitch circle Diamonds lie on a different cone angle.
  • two rotationally symmetrical molded parts are produced be, preferably by turning.
  • One molding has a conical shape Recess on and is preferably cylindrical on the circumference.
  • the second molding has a tapered axial section which mates with the tapered recess is recorded.
  • the second molded part can also be cylindrical be, preferably with the same diameter as the first molded part.
  • the second molded part can be provided with an axial collar that fits the central bore of the first molded part is added. The two molded parts are clamped together, on which holes can be formed for the later Admission of connecting screws.
  • the first molded part on the turned away from the second molded part in particular to form a Tapered disk section in the radially outer area.
  • the first molding loosened from the second, and the conical disk area is machined to produce the Receiving slots and, if necessary, the compensation slots.
  • This editing can be done as well with the other receiving disks in different ways, for example by punching, eroding, laser processing, etc.
  • first and second molded part clamped together again, but before or at the same time the diamonds are inserted into the receiving slots.
  • the second molded part is processed on the first Molding facing side, so that only a conical disc remains, which by the first molded part or its conical recess is received, the Diamonds advantageously radially slightly over the outer circumference of this conical disk protrude. Then the diamonds are ground to the desired geometry, e.g. Radius.
  • a flat washer 10 made of steel is shown which e.g. a thickness of 0.8 to 1 mm.
  • the ring disk At the outer edge is the ring disk with a series of receiving slots 12 provided, which are arranged in a predetermined division. details the receiving slots 12 are shown in FIG. 2.
  • the Slits 12 have a receiving section 14 which is at the lower end by a in the slot 12 protruding approach or stop 16 is interrupted. among them there is a section 18 which has a slightly larger width than section 14.
  • Under section 18 is an arcuate narrow slot section 20, which ends in a circular hole 22.
  • a radial compensation slot 26 can also be seen in FIG. 2, which is a segment 24 divided approximately centrally between adjacent receiving slots 12. Nearly A circular hole 28 is formed in the longitudinal center of the compensation slot 26. The circular hole may have a counterbore (not shown) to accommodate one shown screw or other clamping element. Using the screw or of the tensioning element can be formed by the compensation slot 26 sections of the associated segment are more or less bent apart.
  • Elongated or rod-shaped diamonds 32 are inserted into the receiving sections 14. You have e.g. a length of 4 mm and are approximately square in cross-section with a dimension of e.g. 0.8 x 0.8 mm. The width of the receiving sections 14 is also approximately 0.8 mm with a tolerance as indicated in FIG. 2 is. The dimensions of the diamonds 32 are also not inconsiderable Tolerance on. If there is a match between the width of a diamond 32 and a receiving portion 14 is inserted appropriately. In selecting of diamonds 32 for attachment in the receiving slots 12 can be done in this way that a diamond with e.g.
  • FIG. 3 shows two disks 10a, 10b in side view, those of disk 10 with cut diamonds 32 like.
  • the disks 10a, 10b can in different Arrangement can be arranged to each other, for example with axial alignment of diamonds 32 to each other or an offset of the diamonds. Moreover there can be a different division of the receiving slots for the disks 10a, 10b to get voted.
  • the diamonds can also be spread evenly from both discs be held in order to obtain an overlap in the axial direction.
  • FIG. 3 two support disks 34, 36 can also be seen with an annular collar 38 or 40 on the side facing away from the disks 10a, 10b and with a conical disk section 42 or 44 with a very small angle at the radially outer end of e.g. 12 up to 23 °. 3 finally shows an assembly or receiving bushing 46 with a bushing section 48 which fits through the openings of the disks 34, 36 and the receiving disks 10a, 10b can be passed through and with a flange section 50.
  • the mounting bush 46 is used for mounting the parts shown and, if necessary, for clamping the dressing roller according to FIGS. 4 and 5 in a dressing machine. How indicated in Fig. 3, the parts shown are clamped together by screws, wherein a screw is indicated at 52.
  • the holes in the support washers 34, 36 are preformed or can be drilled after assembly all parts, including the receiving disks 10a, 10b through holes for the Have screws 52.
  • the completely assembled arrangement according to FIG. 3 is without an assembly bushing in FIG. 4 shown.
  • only one disk 10 is arranged between the support disks 34, 36.
  • a small angle ⁇ is obtained on the circumference, for example of only 25 °. It can of course also be chosen larger.
  • the diamonds 32 are ground with a small radius, e.g. between 0.05 and 0.5 mm.
  • the support disks 42, 44 are made of a material that can also be cut when grinding the diamonds 32. The material is e.g. Hard metal, cermet, ceramic or hard-coated steel or the like.
  • a corresponding one Compensation material between the disks 10 and 10a, 10b and the support disks 34, 36 can be arranged.
  • a compensating material can e.g. plastic be a casting alloy, a solder alloy, cellulose or an electrodeposited Metal.
  • Fig. 6a two components 54, 56 are shown, with component 54 being cylindrical is with a central bore and a conical recess 58 on one Page that is drawn in dashed lines.
  • the recess extends in the conical part to the outer periphery of the molded part 54.
  • the molded part 56 also has a cylindrical Section 60, which has the same diameter as the molded part 54 and a conical section 62 which is shaped to complement the recess 58.
  • At the conical section 52 is an axial collar 64, which fits from the bore of the molded part 54 is received.
  • the molded part 56 in turn has one perforation drawn in dashed lines.
  • 6b shows how the molded parts 54, 56 are braced against one another. It will Bores formed, one of which is shown in phantom at 64. 6c is to see how the molded part 54 is processed so that a conical disk 66 is formed with an axial collar 68. The conical disk 66 is partially in Fig. 6d Section shown alone after removal of the molded part 56.
  • the conical area of the conical disk 66 is e.g. by eroding with receiving slots 12a, which approximately the same as the receiving slots 12 of FIG. 2.
  • the shape of the slots 12a should therefore no longer be discussed in detail become.
  • Compensation slots 26a are also formed.
  • the receiving slots 12 accept rod-shaped diamonds 32a. 7, protrude the diamonds 32a beyond the plane of the surface of the cone. In doing so, a Get angle between this surface and the base of the cone of about 20 °.
  • the disk 66 After the disk 66 has been produced, it is reassembled with the molded part 56a, as can be seen in Fig. 6e. Holes 70 and 72 are then drilled approximately perpendicular to the conical section of the disk 66 into the molded part 56. After the assembly of the diamonds 32a according to FIG. 6f can then with the help of Screws 74, the disk 66 are additionally fixed on the molded part 56, the lower screws can extend through holes 76 according to FIG. 8 and the upper screws 74 in counterbores 28a to clamp the diamonds 32a in the disk 66.
  • the molded part 56 is processed so far that only one 7 remains, which is completely from the conical disk 66 is recorded.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)

Claims (17)

  1. Galet à dresser pour meules comportant un disque circulaire (10, 10a, 10b, 66) en matériau élastique, en particulier métallique, qui présente à la périphérie des fentes réceptrices radiales (12, 12a) espacées selon la périphérie, comportant en outre des diamants allongés (32, 32a) de dimensions approximativement égales, qui sont reçus de façon approximativement ajustée, par serrage, dans les fentes réceptrices (12, 12a) et au moins un disque d'appui (34, 36, 78) en matériau stable à la flexion sur au moins une face du disque (10, 10a, 10b, 66), dont le rayon extérieur correspond approximativement au rayon extérieur du disque (10, 10a, 10b ,66).
  2. Galet à dresser selon la revendication 1, caractérisé en ce que les fentes réceptrices (12, 12a) comportent des parties (20, 20a) allongées radialement vers l'intérieur, dont la largeur est, de préférence, inférieure à celle des fentes réceptrices (14, 14a), grâce à quoi des segments déformables (24) sont formés dans le plan du disque (10, 10a, 10b, 66) entre les fentes réceptrices (12, 12a).
  3. Galet à dresser selon la revendication 2, caractérisé en ce que les parties de fente allongées (20, 20a) sont formées de manière qu'une déformation des segments (24) se produit de telle manière que les parois des fentes réceptrices (12, 12a) s'orientent approximativement parallèlement à elles-mêmes.
  4. Galet à dresser selon la revendication 2 ou 3, caractérisé en ce que les extrémités intérieures des fentes réceptrices allongées (20, 20a) débouchent dans un trou (22, 22a).
  5. Galet à dresser selon l'une des revendications 2 à 4, caractérisé en ce que les parties de fente allongées (20, 20a) comportent une zone de fente élargie (18, 18a).
  6. Galet à dresser selon l'une des revendications 1 à 5, caractérisé en ce que des fentes de compensation radiales (28, 28a) sont disposées à la périphérie du disque (10, 10a) entre les fentes réceptrices voisines (12, 12a) selon une répartition prédéterminée.
  7. Galet à dresser selon la revendication 6, caractérisé en ce que dans les fentes de compensation (26, 26a) sont disposées des ouvertures (28, 28a), qui reçoivent une vis ou un élément de serrage (74) pour modifier à volonté la largeur des fentes de compensation (26, 26a).
  8. Galet à dresser selon l'une des revendications 1 à 7, caractérisé en ce que le disque d'appui (34, 36, 78) est conçu comme disque profilé avec un profilé prédéterminé à la périphérie extérieure.
  9. Galet à dresser selon l'une des revendications 1 à 8, caractérisé en ce que les diamants (32) sont affûtés à l'extrémité extérieure avec une géométrie donnée.
  10. Galet à dresser selon l'une des revendications 1 à 9, caractérisé en ce que le disque d'appui (34, 36, 78) est formé en matériau dur qui peut être affûté en même temps que les diamants (32, 32a).
  11. Galet à dresser selon la revendication 10, caractérisé en ce que le disque d'appui (34, 36, 78) est formé de métal dur, cermet, céramique ou autre matériau revêtu de matériau dur.
  12. Galet à dresser selon l'une des revendications 1 à 11, caractérisé en ce que le disque (10, 10a, 10b) est serré entre deux disques d'appui (34, 36), de préférence de même construction, pour la formation d'un galet de forme.
  13. Galet à dresser selon la revendication 12, caractérisé en ce que deux ou plusieurs disques récepteurs (10a, 10b) sont disposés près les uns des autres.
  14. Galet à dresser selon la revendication 12 ou 13, caractérisé en ce qu'un matériau de compensation est placé entre les disques (10a, 10b) ou entre respectivement un disque et un disque d'appui (34, 36, 78).
  15. Galet à dresser selon la revendication 14, caractérisé en ce que le matériau de compensation est constitué par une matière synthétique, un alliage de fonderie, un alliage de soudure, de la cellulose ou un métal déposé par galvanoplastie.
  16. Galet à dresser selon l'une des revendications 1 à 15, caractérisé en ce que le disque récepteur (66) a, dans la zone radialement extérieure, la forme d'un disque conique et est soutenu d'un côté par un disque d'appui (78) de forme complémentaire pour la formation d'un galet conique à dresser.
  17. Procédé de fabrication d'un galet conique selon la revendication 16, comportant les étapes suivantes :
    on fabrique une première et une deuxième pièce de forme possédant une symétrie de rotation (54, 56), la première pièce de forme (54) comportant un évidement conique (58) et la deuxième pièce de forme (56) comportant une partie axiale (62) de forme complémentaire;
    les première et deuxième pièces de forme (54, 56) sont serrées ensemble et la première pièce de forme est usinée du côté opposé à la deuxième pièce de forme (56) jusqu'à ce qu'un disque conique soit formé;
    des fentes réceptrices sont formées dans le disque conique (66) de la partie conique éloignée de la deuxième pièce de forme (56);
    le disque conique (66) et la deuxième pièce de forme (56) sont de nouveau serrés ensemble et des alésages sont formés pour une liaison par vis entre le disque conique (66) et la pièce de forme (56);
    le côté de la deuxième pièce de forme opposé au disque conique (66) est usiné jusqu'à donner un disque d'appui conique (78);
    auparavant ou à cet instant, les diamants (32a) sont introduits dans les fentes réceptrices, éventuellement en modifiant la largeur des fentes de compensation (26a);
    après la fixation des diamants (32a), ceux-ci sont affûtés à l'extrémité extérieure à un rayon souhaité.
EP98120879A 1997-12-09 1998-11-04 Molette de dressage pour meules de rectification Expired - Lifetime EP0922533B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19754517 1997-12-09
DE19754517A DE19754517C2 (de) 1997-12-09 1997-12-09 Abrichtrolle für Schleifscheiben und Verfahren zur Herstellung einer Abrichtrolle

Publications (3)

Publication Number Publication Date
EP0922533A2 EP0922533A2 (fr) 1999-06-16
EP0922533A3 EP0922533A3 (fr) 2001-03-28
EP0922533B1 true EP0922533B1 (fr) 2002-07-03

Family

ID=7851192

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98120879A Expired - Lifetime EP0922533B1 (fr) 1997-12-09 1998-11-04 Molette de dressage pour meules de rectification

Country Status (7)

Country Link
EP (1) EP0922533B1 (fr)
JP (1) JPH11245167A (fr)
AT (1) ATE219988T1 (fr)
BR (1) BR9805245A (fr)
CA (1) CA2254189A1 (fr)
DE (2) DE19754517C2 (fr)
ES (1) ES2176883T3 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT410912B (de) 2002-02-18 2003-08-25 Swarovski Tyrolit Schleif Abrichtrolle für schleifscheiben
ATE477887T1 (de) * 2006-03-21 2010-09-15 Mueller Diamantmetall Ag Dr Werkzeug zum bearbeiten von oberflächen und verfahren zur herstellung eines solchen werkzeugs
DE202009018978U1 (de) 2009-09-12 2015-02-06 Saint-Gobain Diamantwerkzeuge Gmbh Vorrichtung zum Abrichten von Schleifscheiben
GB201709626D0 (en) 2017-06-16 2017-08-02 Rolls Royce Plc Abrasive machining
DE102017214278A1 (de) * 2017-08-16 2019-02-21 ROT GmbH Abrichtwerkzeug umfassend einen metallischen Grundkörper mit einer Umfangskante oder Umfangsfläche, welche mit Hartstoffelementen besetzt ist

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE35294C (de) * WAGNER - SCHNEIDER in Steckborn, Schweiz und in Hemmenhofen, Baden Fräsrad zum Schärfen und Abdrehen von Schleifsteinen
DE369862C (de) * 1921-11-18 1923-02-23 Julius Blank Schaerfrolle fuer Holzschleifsteine
FR2540025B1 (fr) * 1983-01-28 1991-05-10 Precidia Outil rotatif comportant un corps de revolution pourvu d'elements actifs pour usiner des materiaux tels que du granit, du marbre ou un produit refractaire
DE3378897D1 (en) * 1983-02-22 1989-02-16 Winter & Sohn Ernst Diamond form dressing roller for dressing grinding wheels
US4972646A (en) * 1988-03-14 1990-11-27 Foam Form Systems, Inc. Concrete forming system
JPH029576A (ja) * 1988-06-28 1990-01-12 Nippei Toyama Corp 研削砥石の砥石修正装置
JPH03149182A (ja) * 1989-10-31 1991-06-25 Toyoda Mach Works Ltd ダイヤモンドドレッサ

Also Published As

Publication number Publication date
EP0922533A2 (fr) 1999-06-16
BR9805245A (pt) 1999-11-23
DE19754517A1 (de) 1999-06-17
ES2176883T3 (es) 2002-12-01
CA2254189A1 (fr) 1999-06-09
DE59804648D1 (de) 2002-08-08
EP0922533A3 (fr) 2001-03-28
JPH11245167A (ja) 1999-09-14
DE19754517C2 (de) 2001-02-01
ATE219988T1 (de) 2002-07-15

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