EP0132567B1 - Dispositif de serrage pour une meule annulaire - Google Patents

Dispositif de serrage pour une meule annulaire Download PDF

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Publication number
EP0132567B1
EP0132567B1 EP84106731A EP84106731A EP0132567B1 EP 0132567 B1 EP0132567 B1 EP 0132567B1 EP 84106731 A EP84106731 A EP 84106731A EP 84106731 A EP84106731 A EP 84106731A EP 0132567 B1 EP0132567 B1 EP 0132567B1
Authority
EP
European Patent Office
Prior art keywords
slip ring
radius
flange
wedges
centering device
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
Application number
EP84106731A
Other languages
German (de)
English (en)
Other versions
EP0132567A1 (fr
Inventor
Erwin Junker
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.)
Individual
Original Assignee
Individual
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
Priority claimed from DE19833322258 external-priority patent/DE3322258C1/de
Priority claimed from DE19843405556 external-priority patent/DE3405556C1/de
Application filed by Individual filed Critical Individual
Priority to AT84106731T priority Critical patent/ATE27237T1/de
Publication of EP0132567A1 publication Critical patent/EP0132567A1/fr
Application granted granted Critical
Publication of EP0132567B1 publication Critical patent/EP0132567B1/fr
Expired 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
    • B24B45/00—Means for securing grinding wheels on rotary arbors
    • 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
    • B24D5/16—Bushings; Mountings

Definitions

  • the invention relates to a centering device for a metal slip ring, which has a grinding surface on its outer circumference, with a tensioning flange and a support flange, the support part of which has a plurality of radially projecting wedges running over its length, which are assigned corresponding grooves in the bore of the slip ring.
  • Slip rings usually have circular bores, and the support pins of the clamping flanges also have a circular cross section. Because of the very high speeds at which slip rings rotate, eccentricities in the slip ring bearings produce dangerously large ones. Mass forces. Therefore, when clamping a slip ring, care must be taken to avoid imbalance, i.e. to ensure exact centering. In the known slip rings, the play between the slip ring bore and the trunnion is therefore kept extremely low. This avoids an imbalance, but at the cost of the disadvantage that it is very difficult to slide the slip ring onto the trunnion.
  • a tensioning device for a slip ring with the above-mentioned disadvantages is known (FR-A-445,807), in which wedges in the supporting flange and grooves in the slip ring are to be used to make such a connection between these parts that the slip ring is prevented from bursting.
  • US-A-1 661 861 describes a device for fastening a rotating grinding wheel to a flange of a flexible shaft, the grinding wheel and the flange having curved and undercut surfaces on protrusions which, when the grinding wheel rotates relative to the flange, in relation to one another Coming system and thus cause a tightening, which can be increased by bolts extending through the flange. Apart from the fact that these surfaces require a special effort in the manufacture of the flange and the wheel, with this arrangement an exact centering of the grinding wheel on the flange is neither addressed nor possible.
  • the object of the invention is to develop a centering device for a slip ring in such a way that it is possible in a simple manner to place the slip ring, which is cheaper to manufacture than before, with a large amount of play and thus easily onto the supporting flange, but to set a slight play before tightening to achieve a good centering and a perfect concentricity.
  • three wedges are provided that are evenly distributed over the circumference.
  • the maximum tolerance between the radii is 5 11m.
  • this centering device according to the invention for, in particular, slip rings with cubic boron nitride is that, given the tolerance of bore of the grinding wheel to the diameter of the supporting part in the range of 5 11 m, the grinding wheel can no longer be mounted using conventional methods, with the proposal according to the invention, however, it is easy to slide the slip ring onto the support part if the grooves of the slip ring are aligned with the wedges on the circumference of the support part. After reaching the position of the slip ring perpendicular to the axis, the slip ring then only needs to be rotated so that the required fit is produced. In this position, the slip ring is clamped in the usual way between the support flange and the clamping flange.
  • the centering takes place in that the wedges, with their outer contours increasing in cross-sectional profile, lay like wedge-like inclined planes on groove edges of the slip ring, whereby this, controlled by the wedge-like inclined planes, slips into the exactly centered position. Because this type of centering without a tight concentric fit of the wedges in the slip ring bore , there is no need to use slip rings with narrow radial tolerances. Slip rings with relatively wide radial tolerances can be manufactured comparatively cheaply.
  • Each wedge expediently has a contour increasing from the smaller radius to the larger radius in the form of a circular arc with the radius whose center of curvature is offset laterally by an eccentricity from the center of the supporting part of the supporting flange.
  • the contour advantageously increases counter to the direction of rotation of the supporting part.
  • preferably three wedges are evenly distributed over the entire circumference of the supporting part of the supporting flange.
  • a supporting part with three evenly spaced wedges can rest on three and only three equally spaced locations on the slip ring.
  • a particular advantage of this design of the centering device is that it allows not only easy sliding on and precise centering, but also cheaper manufacture of the slip rings, namely those with further radial tolerances.
  • a slip ring 1 is shown, which sits with its bore 10 on the support member 3 of a centering device on a drive shaft 4.
  • the support part 3 is part of the support flange 5, which has a flat annular surface as a clamping surface 6, which is arranged exactly at right angles to the longitudinal axis of the drive shaft 4.
  • the slip ring 1 is held on the support part 3 with the aid of a clamping flange 2 which is screwed to the support flange 5.
  • a bore 10 with the inner radius B has, as is clearly shown in FIGS. 2 to 5, three axially parallel grooves 8 arranged at the same distance from one another, while on the circumference of the supporting part 3 there are likewise equally spaced wedges 9 which are somewhat narrower than the grooves 9 of the slip ring 1 are.
  • the slip ring 1 can therefore be pushed onto the support part 3 with so much play that the slip ring and the support part hardly touch
  • the right angle of the slip ring to the axis of rotation is exactly given when the slip ring 1 rests with its end face 7 on the support flange 5.
  • the slip ring 1 is then rotated with respect to the flange 5 with its support part 3 until the position shown in Fig. 4 is reached the known fixing of the slip ring on the centering device, for example with the aid of the clamping flange 2 shown in FIG. 1.
  • the centering device shown in FIGS. 5 and 6 also serves to center the slip ring 1, which is formed from boron nitride with a suitable bond and, according to experience, is very sensitive to imbalance.
  • This device consists of the drive shaft 4, the supporting flange 5, the supporting part 3, the bearing journal and the clamping flange 2.
  • the slip ring 1 has, in the bore 10, three likewise axially parallel grooves 8, which are evenly distributed, that is to say offset from one another by 120 ° in each case.
  • the support part 3 of the support flange 5 carries three wedges 11, 12 and 13, which are also equally spaced from each other by 120 °.
  • the cross-sectional profile of each wedge 11, 12 and 13 increases from a smaller radius R1; which is smaller than the bore radius B, steadily increases to a larger radius R2 which is larger than the bore radius B.
  • the contour of the wedge 11 becomes a wedge-like inclined plane, which runs up to the edge of the groove 8 when the slip ring 1 rotates clockwise.
  • Rotation of the slip ring 1 clockwise therefore means that the slip ring 1 lies against all three wedge contours and, controlled by them, into the centered position shown in FIG. 5 slips. In this position, the slip ring is fixed by tightening the clamping flange 2.
  • the direction of rotation of the centering device is indicated by an arrow 15 in FIG. 6. It is expedient that the contour of the wedges increases counter to the direction of rotation according to arrow 15, e.g. with the wedge 11 the smaller radius R1 runs ahead.
  • the wedge contour can be increased from the smaller radius R1 to the larger radius R2 in various ways. In principle, a linear increase is even possible. 6 shows a particularly simple solution in terms of production technology. Thereafter, the contour of the wedge 11 is in the form of a circular arc, but the center of curvature M2 of the circular arc with the radius R is offset laterally by the eccentricity x from the center M1 of the supporting part 3 of the supporting flange 5.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Clamps And Clips (AREA)

Claims (7)

1. Dispositif de centrage pour une meule annulaire métallique (1) portant sur sa circonférence extérieure un revêtement abrasif, avec une bride de serrage et une bride de support (2, 5) dont l'élément porteur (3) présente une pluralité de clavettes qui s'étendent sur sa longueur et dépassent dans le sens radial et auxquelles sont associées des encoches (8) correspondantes dans l'alésage (10) de la meule annulaire (1), caractérisé par le fait que le rayon (D,) des clavettes (9) circonscrites n'est que légèrement plus petit que le rayon d'alésage (B1) de la meule annulaire (1),
2. Dispositif de centrage selon la revendication 1, caractérisé par le fait qu'il comprend trois clavettes (9) réparties régulièrement sur la circonférence.
3. Dispositif de centrage selon l'une des revendications 1 ou 2, caractérisé par le fait que la différence entre les rayons (D1, B,) est au maximum de 5 µm.
4. Dispositif de centrage pour une meule annulaire métallique (1) portant sur sa circonférence extérieure un revêtement abrasif, avec une bride de serrage et une bride de support (5) dont l'élément porteur (3) présente une pluralité de clavettes (11, 12, 13) qui s'étendent sur sa longueur et dépassent dans le sens radial et auxquelles sont associées des encoches (8) correspondantes dans l'alésage de la meule annulaire, caractérisé par le fait que le profil de la section transversale de chaque clavette (11, 12, 13) monte en continu d'un rayon inférieur (R1) qui est plus petit que le rayon d'alésage (B,) de la meule annulaire (1) jusqu'à un rayon supérieur (R2) qui est plus grand que le rayon d'alésage (Bl).
5. Dispositif de centrage selon la revendication 4, caractérisé par le fait que chaque clavette (11, 12, 13) présente un contour en forme d'arc de cercle avec un rayon (R) qui passe du rayon inférieur (R,) au rayon supérieur (R2) et dont le centre de courbure (M2) est décalé latéralement de la quantité d'une excentricité (x) par rapport au centre (Mi) de l'élément porteur (3) de la bride de support (5).
6. Dispositif de centrage selon la revendication 4, caractérisé par le fait que pour chaque clavette (11, 12, 13) le contour monte en sens inverse du sens de rotation (15) de l'élément porteur (3).
7. Dispositif de centrage selon l'une des revendications 1 ou 4, caractérisé par le fait que trois clavettes (11, 12, 13) sont réparties régulièrement sur la circonférence de l'élément porteur (3) de la bride de support (5).
EP84106731A 1983-06-21 1984-06-13 Dispositif de serrage pour une meule annulaire Expired EP0132567B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84106731T ATE27237T1 (de) 1983-06-21 1984-06-13 Spannvorrichtung fuer einen schleifring.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3322258 1983-06-21
DE19833322258 DE3322258C1 (de) 1983-06-21 1983-06-21 Spannvorrichtung für einen Schleifring
DE19843405556 DE3405556C1 (de) 1984-02-16 1984-02-16 Spannvorrichtung für einen Schleifring
DE3405556 1984-02-16

Publications (2)

Publication Number Publication Date
EP0132567A1 EP0132567A1 (fr) 1985-02-13
EP0132567B1 true EP0132567B1 (fr) 1987-05-20

Family

ID=25811611

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84106731A Expired EP0132567B1 (fr) 1983-06-21 1984-06-13 Dispositif de serrage pour une meule annulaire

Country Status (2)

Country Link
US (1) US4577440A (fr)
EP (1) EP0132567B1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3823591A1 (de) * 1987-12-23 1989-07-06 Fortuna Werke Maschf Ag Schleifscheibe
DE4317277C2 (de) * 1993-05-25 1996-05-23 Bayerische Motoren Werke Ag Vorrichtung zur fluchtenden Anordnung von drehbeweglichen, miteinander zu verbindenden Wellenendabschnitten
US6230600B1 (en) 1996-07-12 2001-05-15 Precision Arbor Systems, Inc. Saw arbor and guided circular saw
US5901629A (en) * 1996-07-12 1999-05-11 Precision Arbour Systems, Inc. Saw arbor and guided circular saw
US5997390A (en) * 1998-02-02 1999-12-07 Speedfam Corporation Polishing apparatus with improved alignment of polishing plates
USD424076S (en) * 1999-02-24 2000-05-02 Black & Decker Inc. Mounting device for a cutting tool
USD417598S (en) * 1999-02-24 1999-12-14 Black & Decker Inc. Rotatable cutting tool
DE102004061871B4 (de) * 2004-12-22 2007-05-31 Erwin Junker Maschinenfabrik Gmbh Spannvorrichtung mit Zentriervorrichtung an einem Schleifspindelrotor und Rotationsteil mit einer derartigen Zentriervorrichtung
CN100534720C (zh) * 2008-05-07 2009-09-02 常熟市中恒数控设备制造有限公司 磨床主轴端头机构
DE202008011959U1 (de) * 2008-08-29 2010-02-11 C. & E. Fein Gmbh Adapter zum Befestigen eines Werkzeugs an einem Oszillationsantrieb
DE102018206641A1 (de) * 2018-04-27 2019-10-31 Robert Bosch Gmbh Vorrichtung und Verfahren zum Schneiden eines Produkts, insbesondere aus Süßwarenmasse

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7212119U (de) * 1972-10-26 Graupner F Vorrichtung zum Befestigen von rotierenden Schleifwerkzeugen an einem Flansch
FR445807A (fr) * 1912-07-06 1912-11-20 Jeremie Frederic Louis Doucet Perfectionnements aux meules d'émeri pour rendre impossible leur éclatement
US1661861A (en) * 1925-06-23 1928-03-06 Carborundum Co Grinding wheel and holder therefor
US2255885A (en) * 1939-09-05 1941-09-16 Charles J Steidl Device for securing saws and other appliances to arbors
US2497217A (en) * 1947-03-08 1950-02-14 Walter J T Hall Holder for rotary tools with center holes of different sizes
US2577042A (en) * 1951-02-24 1951-12-04 Speicher Elmer Truing and balancing device for face type diamond grinding wheels
US2855731A (en) * 1956-12-26 1958-10-14 Super Cut Truing device for peripheral type grinding wheels
DE1167644B (de) * 1957-05-15 1964-04-09 Karl Rud Dienes Fabrikationsge Vorrichtung zum Befestigen von Kreismessern auf dem zugehoerigen Wellenteil von Laengsschneidmaschinen fuer Papierbahnen od. dgl.
US3353306A (en) * 1964-01-31 1967-11-21 Norton Co Hub mounting for grinding wheels
US3613472A (en) * 1970-08-12 1971-10-19 Gerhard R Held Honing gear assembly
SE7407501L (sv) * 1974-06-07 1975-12-08 Lidkoepings Mekaniska Verkstad For vexling av slipskivor pa en slipspindel anpassad slipmaskin.

Also Published As

Publication number Publication date
EP0132567A1 (fr) 1985-02-13
US4577440A (en) 1986-03-25

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