EP0565675A1 - Dispositif a disque d'usinage - Google Patents

Dispositif a disque d'usinage

Info

Publication number
EP0565675A1
EP0565675A1 EP19920922284 EP92922284A EP0565675A1 EP 0565675 A1 EP0565675 A1 EP 0565675A1 EP 19920922284 EP19920922284 EP 19920922284 EP 92922284 A EP92922284 A EP 92922284A EP 0565675 A1 EP0565675 A1 EP 0565675A1
Authority
EP
European Patent Office
Prior art keywords
plate
working
working disc
face
disc arrangement
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.)
Withdrawn
Application number
EP19920922284
Other languages
German (de)
English (en)
Inventor
Hans J. Fabritius
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.)
FABRITIUS HANS JOSEF
Original Assignee
FABRITIUS HANS JOSEF
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 FABRITIUS HANS JOSEF filed Critical FABRITIUS HANS JOSEF
Publication of EP0565675A1 publication Critical patent/EP0565675A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D9/00—Wheels or drums supporting in exchangeable arrangement a layer of flexible abrasive material, e.g. sandpaper
    • B24D9/08—Circular back-plates for carrying flexible material
    • B24D9/085—Devices for mounting sheets on a backing plate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D13/00—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor
    • B24D13/18—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor with cooling provisions

Definitions

  • the invention relates to a working disk arrangement.
  • Such a working disc arrangement is described in DE 32 19 344 AI and comprises a plate and a working disc carried by it.
  • the plate is set up for clamping in a rotary tool drive, such as an electric or compressed air operated tool, e.g. a hand drill, an angle grinder or the like ..
  • a rotary tool drive such as an electric or compressed air operated tool, e.g. a hand drill, an angle grinder or the like .
  • the plate preferably consists of a flexible or resilient material, so that when it is pressed against a workpiece, it clings to the surface thereof, even if the axis of rotation of the plate is not oriented perpendicularly to it.
  • the material of the plate can e.g. To be rubber, however, is the most advantageous foamed polyurethane.
  • the working disk can be designed as an unstiff grinding or polishing disk, eg made of sandpaper, emery cloth or lambskin, has essentially the same diameter as the plate and has an engagement coating on the surface facing the plate, which in the known arrangement has this over it entire surface extends.
  • an unstiff grinding or polishing disk eg made of sandpaper, emery cloth or lambskin
  • the engagement coating is designed in such a way that it enters into a holding connection with the Velcro layer when it is pressed against it and consists, for example, of velor. It is thus possible to attach an unused work disc to the plate by simply pressing it against the Velcro layer with its engagement coating. Likewise, the used working disk can simply be pulled off the plate.
  • the Velcro layer does not extend over the entire surface of its face, as in the known plate, but only over the central area thereof, even under heavy loads and thus heating of the working disc in the edge region is only heated to such an extent that the attachment of the Velcro layer is not released and the entire arrangement is not damaged.
  • the size of the engagement coating so that it essentially covers only the Velcro layer of the plate.
  • This not only greatly reduces the heat transfer from the edge area of the working disk to its central area and thus ultimately prevents initiation of detachment of the engagement layer, but it is also possible to design the surface of the working disk facing the edge area of the plate in such a way that that when it is pressed against the plate, it enters into a frictional engagement with the plate, which causes the force transmission in the circumferential direction at least to a considerable extent, preferably largely.
  • the material of the plate preferably foamed polyurethane, is itself largely temperature-resistant; Even if its surface is slightly and temporarily softened by the thermal load, this does not lead to permanent damage to the plate which limits its usefulness.
  • the material of a conventional, flexible grinding wheel is also - on its rear side of such a nature that a good frictional connection with the plate arises in the case of the contact pressure which occurs during normal use.
  • the Velcro layer and also the engagement coating preferably cover circular areas and are preferably structured essentially homogeneously, so that they can be punched out or cut out of a web material and glued to the plate and working disc.
  • a contour other than a round contour for example a star-shaped contour, which for example omits heat-conducting wire reinforcements in the working disk.
  • the Velcro layer of the plate is preferably surrounded by an annular groove which, as a heat barrier, hinders the heat transfer radially inwards from the edge region.
  • the annular groove forms a point of discontinuity when the flexible plate is bent, which prevents the Velcro layer from being detached from the plate, that the local bending of the plate away from the Velcro layer requires its increased adhesiveness to it, but because of this adhesiveness the warming is reduced
  • grooves are left in the edge region of the plate, which preferably open into the outer circumference and / or into the annular groove of the plate. In the area of these grooves, the heat transfer between the working disk and the plate is reduced, so that the stability of the plate is improved; In addition, cooling air can preferably flow through the grooves and in particular into the annular groove, from where heat can thus be dissipated and thus the heating of the Velcro layer or its adhesive layer can be reduced even further. It may also be advantageous to provide the plate with settling exhaust air ducts that open into the annular groove.
  • the grooves are arcuate, extend overall in the radial direction and open into the circumference of the plate in such a direction that they are inclined there towards the direction of rotation, so that air flows into the plate when the plate is rotated Grooves is scooped and thus the annular groove is forced-ventilated.
  • the grooves which run essentially transversely to the direction of rotation contribute to better power transmission.
  • This feature can be achieved in that the thickness of the edge area is less than that of the central area, that the central area has a reinforcement and / or that the edge area is weakened.
  • a reinforcement a metal insert can be embedded in the middle of the plate; the weakening of the edge area is achieved by suitable arrangement, width and / or depth of the grooves.
  • Fig. 1 is a plan view of the plate of the invention
  • Fig. 2 is a largely cut along line H-IE in Fig. 1
  • the working wheel arrangement shown consists of a plate 1 and a grinding wheel 2.
  • the plate consists of flexible foam polyurethane and is essentially rotationally symmetrical with respect to its axis of rotation 3 and is formed from a flat disc which has an essentially flat end face 4 which extends to the circumference, while the opposite radial surface is bevelled on its circumference and has a protruding shoulder in its center, from which extends a drive axis 5 which is fixedly connected to the plate 1 and whose central axis coincides with the axis of rotation 3
  • the end face is subdivided into a circular central region centered on the axis of rotation 3 and an annular region centered on the axis of rotation 3, which are separated from one another by an annular groove 6 which is open towards the end surface 4.
  • the end face 4 is covered in the middle area with a Velcro layer 7, which consists of short, narrow no. Pins is formed, the free ends of which are bent or formed like a hook.
  • the middle area can be set back relative to the edge area so that the hook-like ends of the pins of the Velcro layer 7 lie in or near the plane of the edge area.
  • the edge area of the end face 4 is traversed by grooves 8, which are arranged in an arc shape and essentially radially. These grooves end with their one ends in the annular groove 6 and with their other ends in the peripheral edge of the plate 1, these other ends being inclined towards the direction of rotation (arrow) such that when the plate is rotated in Draw the grooves 8 in the direction of the arrow and move them to the ring groove 6.
  • the plate Due to the bevel on the edge and the grooves 8, the plate is less stiff in the edge area than in the middle area; If the plate is resiliently deformed by one-sided pressing of the plate against a workpiece surface, then it assumes the shape shown in broken lines in FIG. 2; as can be seen, rich does not transfer to the bending of the ⁇ Randbe ⁇ due to the annular groove 6 or at most only little on the central area.
  • the annular groove 6 serves as a heat barrier, which inhibits the heat transfer from the edge area to the central area.
  • the grinding wheel 2 has the same or a slightly larger diameter than the plate 1 and its central region and the hook-and-loop layer 7 are formed opposite one another with an engagement coating 9 which is fastened to a grinding wheel body 10 and has the same or a slightly smaller diameter than has the Velcro layer 7.
  • the engagement coating 9 is designed such that it can be brought into holding but releasable engagement by pressing against the Velcro layer.

Abstract

La présente invention concerne un dispositif à disque d'usinage comportant un plateau (1) pouvant être serré dans une perceuse, une meuleuse d'angle ou une machine analogue pour tourner autour de son axe (3); ce plateau est réalisé dans un matériau au moins partiellement souple, de préférence en mousse de polyuréthanne. Le dispositif comporte aussi un disque d'usinage, de préférence un disque de meulage (2), fixé de manière amovible sur la face frontale libre (4) du plateau et pouvant être soutenu par ce dernier essentiellement sur toute sa surface. Sur la face frontale libre (4) du plateau (1) se trouve une couche auto-agrippante (7) susceptible d'être mise en prise avec une couche accrochante (9) située sur la surface correspondante du disque d'usinage (2) pour assurer la fixation de ce dernier. Selon l'invention, la couche auto-agrippante (7) ne couvre que la zone médiane de la face libre (4) du plateau (1), tandis que la bordure du plateau (1) s'applique directement contre le disque d'usinage (2).
EP19920922284 1991-11-02 1992-10-28 Dispositif a disque d'usinage Withdrawn EP0565675A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4136169 1991-11-02
DE19914136169 DE4136169C2 (de) 1991-11-02 1991-11-02 Arbeitsscheibenanordnung

Publications (1)

Publication Number Publication Date
EP0565675A1 true EP0565675A1 (fr) 1993-10-20

Family

ID=6443982

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920922284 Withdrawn EP0565675A1 (fr) 1991-11-02 1992-10-28 Dispositif a disque d'usinage

Country Status (3)

Country Link
EP (1) EP0565675A1 (fr)
DE (1) DE4136169C2 (fr)
HU (1) HUT65317A (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013213272A1 (de) 2013-07-05 2015-01-08 Flex-Elektrowerkzeuge Gmbh Werkzeugaufnahme und handgehaltene Schleifmaschine

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8031256U1 (de) * 1980-11-24 1981-03-26 Fabritius, Hans-Josef, 48165 Münster Befestigung fuer eine arbeitsscheibe
DE3219344A1 (de) * 1982-05-22 1983-11-24 Hans-Josef 4400 Münster Fabritius Befestigung einer z. b. als schleifscheibe dienenden arbeitsscheibe auf einer antriebsscheibe

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9308955A1 *

Also Published As

Publication number Publication date
HU9302226D0 (en) 1993-10-28
DE4136169C2 (de) 1993-11-18
HUT65317A (en) 1994-05-02
DE4136169A1 (de) 1993-05-06

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