EP0212062B1 - Machine à rectifier les surfaces - Google Patents

Machine à rectifier les surfaces Download PDF

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Publication number
EP0212062B1
EP0212062B1 EP86105702A EP86105702A EP0212062B1 EP 0212062 B1 EP0212062 B1 EP 0212062B1 EP 86105702 A EP86105702 A EP 86105702A EP 86105702 A EP86105702 A EP 86105702A EP 0212062 B1 EP0212062 B1 EP 0212062B1
Authority
EP
European Patent Office
Prior art keywords
grinding
base plate
tongue
grinding wheel
laminas
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
EP86105702A
Other languages
German (de)
English (en)
Other versions
EP0212062A1 (fr
Inventor
Gerd Eisenblätter
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.)
EISENBLAETTER, GERD
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 DE19853525620 external-priority patent/DE3525620C1/de
Application filed by Individual filed Critical Individual
Priority to AT86105702T priority Critical patent/ATE43985T1/de
Publication of EP0212062A1 publication Critical patent/EP0212062A1/fr
Application granted granted Critical
Publication of EP0212062B1 publication Critical patent/EP0212062B1/fr
Expired legal-status Critical Current

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Classifications

    • 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
    • B24D13/14—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face
    • B24D13/16—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face comprising pleated flaps or strips

Definitions

  • the invention relates to a flap disc, in which, along the circumferential zone of a circular disk-shaped flexible base plate, grinding flaps are arranged so as to overlap one another and can be clamped, and protrude through radial slots in the circumferential zone, as described in the preamble of claims 1 and 8, respectively.
  • Flap flap face grinding wheels can be used in a variety of ways. Preferably, such lamellar flap discs are used in so-called angle grinders. However, such lamella flap face grinding wheels can also be used in drilling machines or other grinding devices.
  • a preferred area of use for a lamella flap face grinding wheel is the smoothing and plastering of weld seams and welding points.
  • Such flap-flap face grinding wheels can be used for roughing and polishing at the same time, without requiring different wheels or grits. A particularly good surface quality can thus be achieved with the aid of a single tool.
  • the lamella flap disc grinding discs in question are also suitable for other work such as deburring, faceting, rust removal or removal of old colors.
  • Various materials such as steel, stainless steel, non-ferrous metals, aluminum, hard plastics, artificial stones, natural stones, wood or filler can be processed.
  • the base plate consists of a plastic material.
  • plastic vulcanized fiber pressed cardboard has been used as a material for the base plate in the past.
  • grinding lamellae are either inserted into existing recesses and glued with synthetic resin, or the grinding lamellae are glued to the plastic body of the base plate. It must be ensured that when the grinding flaps are attached to the plastic body of the base plate, the grinding flaps are brought into an arrangement required for the grinding or sanding effect, in which the grinding flaps overlap each other like a scale or roof tile.
  • a flap disc is known from DE-A 1 652 890.
  • the required elasticity of the plastic base plate generally only results from the absorption of a certain amount of moisture. It was therefore necessary to store a plastic base plate for several weeks in an environment that allowed the required moisture to be absorbed. Due to different climatic conditions, the storage process was essentially incalculable, so that panes with insufficiently defined elasticity were created. As a result, it could happen that a plastic base plate broke due to the loads at high speeds or heavy workload, which created a considerable risk of accident.
  • a flap face grinding wheel of the type mentioned is known from US Pat. No. 3,616,581.
  • This grinding wheel consists of a completely rigid metallic inner wheel with an opening in the center, around which a ring with an internal thread is concentrically placed for screwing with a spindle attached to a grinding tool.
  • the inner disk is embedded in a circular outer disk made of plastic, which has the radial slots for receiving the grinding flaps.
  • a completely rigid clamping flange is necessary, which must be placed on the tool spindle in front of the grinding wheel.
  • the grinding wheel equipped with grinding flaps which partially protrude from the slots on the side facing away from the workpiece, is then screwed onto the spindle, the peripheral edge of the inner wheel being braced against a raised edge provided with a rubber coating on the outer circumference of the clamping flange.
  • the lamella sections in between are clamped in the beginning of the slots. The lamellae are therefore not clamped in the outer area of the grinding wheel.
  • This flap disc has the disadvantage that it can only be used with an individually adapted clamping flange, and that the grinding flaps can only be jammed in cooperation with a grinding tool, the spindle thread of which must correspond to the grinding wheel thread.
  • a further disadvantage is that the grinding flaps are only held at one end, the reliability of the clamping being dependent on the care of the operator, who clamps the grinding wheel.
  • Another disadvantage is that the rubber coating of the clamping flange is subject to wear, so that the clamping can decrease with increasing use.
  • the inner disk and the clamping flange must be rigid det be. This means that the grinding wheel must be rigid in its interior and does not have the flexibility desired in use.
  • a further disadvantage is that the operator, when placing a grinding wheel on the clamping flange, must ensure that the protruding ends of the grinding flaps are arranged and aligned uniformly in the clamping area, in order to avoid that individual flaps are applied, and therefore that other grinding flaps are not jammed more is guaranteed.
  • the invention has for its object to provide a base plate for a flap disc, which ensures a particularly high level of operational reliability with simple manufacture.
  • the invention provides that the base plate is designed according to the characterizing part as claim 1.
  • the great advantage and the essential technical progress can be achieved that, with a low weight, such a high strength of a grinding wheel arrangement can be achieved that the operational reliability is extremely high even at extremely high speeds.
  • the base plate has such a high strength and stability that the previous risk of breaking apart has been completely eliminated.
  • such a secure attachment of the grinding flaps in the base plate has been achieved that it is practically impossible to throw a grinding flap out of its holder during operation even at very high speeds.
  • the base plate according to the invention can also withstand considerable loads during operation, in particular also flexing loads, without being damaged.
  • the work with the base plate according to the invention also proves to be advantageous because it is nevertheless relatively light in weight with very good strength and stability. Also essential is the advantage which is achieved in that practically every risk of breakage and thus also every risk of accident is reliably excluded.
  • An advantageous embodiment of the invention provides that the clamp is formed by at least one tongue, and that the tongue is formed on the edge of a radial slot.
  • a preferred development of the invention is that the tongues are divided into several tongue sections.
  • tongues are mutually offset on both opposite edges of the slots.
  • the tongues have embossing points projecting counter to the opening direction. This can further increase the reliability with which the grinding flaps are attached to the base plate.
  • a particularly simple device-technical embodiment of the embossing points results from the fact that the embossing points are designed as angled and sharp-edged edges. If the tongues are pressed into the main level of the base plate by a suitable tool after the grinding flaps have been inserted, the grinding flaps are extraordinarily firmly and permanently anchored to the base plate.
  • a particularly preferred development of the subject matter of the invention provides that a support plate is arranged on the side of the base plate facing away from the working surface, that the peripheral edges of the base plate and the support plate are firmly connected to one another and that the backward ends of the grinding flaps are fixed between the base plate and the support plate are clamped.
  • a base plate arrangement is created, which is not only characterized by an extraordinarily high dimensional stability and flexing stability, but also offers the possibility of anchoring the grinding flaps easily and at the same time reliably in the base plate, namely by pressing the base plate and the support plate against each other, after they are firmly connected to one another in the peripheral region.
  • the object of the invention is alternatively achieved according to the characterizing part of claim 8.
  • This measure is based on the idea of designing the naturally flat grinding lamellae in such a way that their shape supports a clamping effect.
  • This solution therefore has the advantage that a disc arrangement is obtained which is not only distinguished by an extraordinarily high dimensional stability and flexing stability, but which at the same time also offers a possibility for the manufacturer to fasten the grinding flaps easily and at the same time reliably.
  • this solution is also characterized by all the advantages which have already been listed above in connection with the other solution of the invention.
  • the anchoring is designed as a thickening at the rear end of the grinding flap. This has the advantage that the thickening is supported when tensile forces occur at the slot edges or against the end face of a tongue or is pushed between the base plate and a tongue and wedged there.
  • Another advantageous embodiment of the anchoring consists in providing at least one recess in the rear edge region of the grinding flap, through which a tongue or at least one tongue section can be pushed.
  • This anchoring has the advantage that the grinding flap is hooked in over a relatively large area.
  • the associated tongue is additionally divided into several tongue sections, it is possible to support the grinding flap between the base plate and the tongue sections enough, as well as hanging the grinding flap in one of the tongue sections.
  • the grinding lamellae are also advantageously fastened in that they are glued to the base plate.
  • an angle grinder (10) is illustrated in a perspective view, which is equipped with a lamellar grinding wheel, which can also be referred to as a flap disc.
  • the grinding wheel is designed in such a way that on a base plate 11 made of metal, preferably of an aluminum alloy (for which the four examples are described below), grinding flaps 13 are attached, which are arranged one above the other in the manner of scales and roof tiles.
  • the grinding flaps 13 are attached to the base plate 11 as follows:
  • radial slots 12 are made in the outer circumferential area of the base plate 11, which is basically in the form of a circular disk, as schematically illustrated in FIG. 12 tongues are then pressed on like gills or blinds in the areas next to the radial slots. In this way, oblique through openings are created, into which the rear ends of the grinding flaps 13 can be inserted.
  • the grinding flaps 13 have the preferred direction that is necessary for the later operation.
  • the tongues are pressed together again from the rear side of the base plate 11. As a result, the grinding flaps 13 are firmly anchored in the base plate 11.
  • the base plate 11 can be equipped with a stiffening bead 30, which is particularly suitable for heavy workloads, i.e. Walk stress has a favorable effect on the dimensional stability of the base plate 11.
  • FIG. 3 illustrates in a section through the base plate acc. Fig. 2, the grinding lamella 13 in its fully attached to the base plate 11 position.
  • the base plate 11 is provided on its side facing away from the work surface with tongues 14, which are each attached to the edge of the slots 12.
  • 3 shows the tongues 14 in the state in which they are pressed firmly onto the base plate 11 and the rear part of the grinding flaps 13 inserted through the slot 12 is clamped in each case.
  • the flap face grinding wheel is thus produced in that a grinding flap is inserted with its rear part through a slot 12 and this is then clamped to the base plate 11 by bending and pressing the associated tongue 14 together.
  • embossing points 16 are formed on the tongues 14, as are shown schematically in FIG. 4. These embossing points 16 can be small elevations which are arranged on the side of the tongue 14 which faces the grinding flaps 13. When the tongues 14 are pressed to anchor the grinding lamella 13, the raised embossing points 16 dig into the material of the grinding lamella 13 and thereby form additional anchoring points.
  • edges of the tongues 14, could also be slightly angled and formed with sharp edges in the direction of the grinding flaps 13, so that when the tongues 14 are pressed in, the edge regions dig into the material of the grinding flaps 13 so far that a secure anchoring of the grinding flaps 13 in the base plate 11 is ensured.
  • embossing points are also shown schematically in the lower region.
  • Two barbs 19 are formed in the tongue 14, which dig into the material of the grinding flaps 13 with their tips when the base plate is pressed together, the tongues 14 being pressed into the body of the base plate 11.
  • the barbs 19 are produced in such a way that an angular slot is first made in a tongue 14.
  • the region of the tongue 14 enclosed by the angular slot is then bent out of the tongue plane against the direction in which the tongue is exposed to the base plate.
  • a grinding flap 13 can be easily inserted into the slot without any appreciable hindrance being caused by the barbs bent out towards the grinding flap. Only when the tongues 14 are pressed firmly onto the grinding flaps 13 do the barbs 19 dig into the material of the grinding flaps and thereby form an extraordinarily reliable fastening of the grinding flaps 13 on the base plate 11.
  • the base plate 11 can be formed in light metal, so that an extremely light, at the same time elastic and very stable construction is created.
  • This construction of the subject of the invention is also largely corrosion-resistant and, as a used waste product, is also environmentally friendly.
  • FIG. 5 shows an example of a flap face grinding wheel in a purely schematic cross section along the circumferential line.
  • the grinding flap 13 is provided in its rear edge region 20 with a thickening 24, which is, for example, a tubular, slotted clamp which extends essentially over the entire width of the grinding flap 13.
  • This clamp can be attached to the grinding flap 13, for example by gluing or by riveting.
  • FIGS. 6, 7 and 8 show further examples of anchoring consisting of a thickening at the rear edge region 20 of a grinding flap.
  • edge strips 25 are applied to substantially both sides of the entire width of the grinding flap.
  • edge strips 25 can, for example, be made from strong cardboard, from light metal sheet or from another tear-resistant material.
  • the thickening consists of adhesive beads 27 applied on both sides.
  • FIG. 8 illustrates an example in which the thickening is produced by rivets 28 which are inserted into the grinding flap at some points along the edge of the rear edge region 20. All of these anchors are unique in that they interact positively with the jamming of the grinding flap 13 and prevent them from being pulled out of the base plate.
  • FIGS. 9, 10 and 11 each show purely schematically advantageous developments of the anchoring which are formed in the rear edge regions 20 of the grinding flaps 13.
  • the anchoring consists of a slot-shaped recess 21, through which a tongue 14 (FIG. 5) or a corresponding tongue section 15 (FIG. 12) can be pushed.
  • the grinding flap 13 according to FIG. 10 has clamping regions 26 on the side, the function of which is described together with FIG. 12.
  • FIG. 11 shows an example of a grinding flap 13 which, in addition to the recess 21, which is completely surrounded by grinding flap material, has two laterally open recesses 22, so that projecting grinding flap arms 23 are formed.
  • the end faces of the slots provided on the base plate engage in the cutouts 22.
  • the cantilevered arms 23 extend beyond the longitudinal extent of a radial slot in the base plate and ensure additional support by being supported on the base plate.
  • FIG. 12 an example of a flap face grinding wheel is shown, which has a plurality of tongue sections 15 along the slot 12.
  • a sliding flap 13 according to FIG. 10 is pushed through the slot 12, and the middle tongue section is inserted through the slot-shaped recess 21 thereof.
  • the two outer tongue sections each lie on a clamping area 26 of the grinding lamella 13 and press it against the base plate 11.
  • the grinding lamella 13 is therefore held on the one hand by a jamming of the outer tongue sections and on the other hand by anchoring to the middle tongue section.
  • the free end tapers not shown.
  • FIG. 13 shows a section in the circumferential direction approximately along the center line of the base plate 11.
  • 12 tongue sections 15 are arranged on one edge of the slot and another tongue section 29 on the other edge.
  • the further tongue section 29 engages in a slot 21 (not shown) in the grinding flap 13, as described in the context of FIG. 12.
  • the representation of this arrangement is purely schematic and does not show the final state in which the tongue sections 15 and 16 are pressed onto the base plate 11.
  • the grinding flaps 13 are held by clamping in the radial slots, it can be provided as a further measure that the grinding flaps 13 are glued with their rear edge regions 20 on the base plate and / or on the tongues 14 or the tongue sections 15 .

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

Claims (12)

1. Disque de meule frontale en éventail, pour lequel des lamelles de meulage (13) se recouvrant entre elles comme des tuiles et susceptibles d'être fixées sont disposées le long de la zone périphérique d'un plateau de base (11) flesible en forme de disque circulaires et passent chaque fois, dans la zone périphérique, à travers des fentes radiales (12), caractérisé en ce que le plateau de base (11) est réalisé sous forme de disque de tôle, en ce que les fentes radiales (12) sont produites par entaillage dans le plateau de base (11) et engagement par pression, en ce que les lamelles de meulage (13) sont maintenues par pincement par les bords de la fente radiale (12), et en ce que le pincement est produit par flexion en arrière des bords engagés par pression.
2. Disque de meule frontale en éventail selon la revendication 1, caractérisé en ce que le pincement est réalisé chaque fois par au moins une languette (14) et en ce que la languette (14) est formée d'une seule pièce sur le bord d'une fente radiale (12).
3. Disque de meule frontale en éventail selon la revendication 2, caractérisé en ce que les languettes (14) sont subdivisées en plusieurs sections de languettes (15).
4. Disque de meule frontale en éventail selon la revendication 2 ou 3, caractérisé en ce que des languettes (14) mutuellement décalées sont adjointes sur les deux bords opposés de la fente (12).
5. Disque de meule frontale en éventail selon l'une des revendications précédentes, caractérisé en ce que chaque languette présente des emplacements gaufrés (16) en saillie vers le pied de lamelle de meulage.
6. Disque de meule frontale en éventail selon la revendication 5, caractérisé en ce que les emplacements gaufrés sont réalisés sous forme de bords repliés et à arêtes vives.
7. Disque de meule frontale en éventail, pour lequel des lamelles de meulage (13), se recouvrant entre elles comme des tuiles, sont fixées le long de la zone périphérique d'un plateau de base (11) en forme de disque circulaire et passent chaque fois, dans la zone périphérique, à travers des fentes radiales (12), caractérisé en ce que le plateau de base (11) est réalisé sous forme de disque de tôle, en ce que les fentes radiales (12) sont produites par entaillage dans le plateau de base (11), en ce que des languettes (14) formées à partir du disque de tôle sont prés- sées sur le côté tourné vers les extrémités arrières des lamelles de meulage (13), à côté des bords de la fente radiale (12), pour former des ouvertures de passage inclinées à travers lesquelles sont introduites les extrémités arrières des lamelles de meulage (13), en ce que chaque lamelle de meulage (13) est ancrée par son extrémité arrière par complémentarité de forme sur la fente correspondante (12) et la languette correspondantes (14), et en ce que les languettes (14) sont repliées contre la face du disque et sont en prise sur l'extrémité arrière des lamelles de meulage, en ce que les lamelles de meulage (13) concernées s'écartent à l'opposé du sens de traction, lors de la sollicitation en traction des lamelles de meulage (13).
8. Disque de meule frontale en éventail selon la revendication 7, caractérisé en ce que l'ancrage est réalisé sur l'extrémité arrière, sous forme d'épaississement de la lamelle de meulage.
9. Disque de meule frontale en éventail selon l'une des revendications 7 ou 8, caractérisé en ce que l'ancrage se compose d'au moins un évidement (21), disposé dans la zone de bordure arrière (20) de la lamelle de meulage (13), à travers lequel une languette (14) ou au moins une section de languette (15) peut être passée.
10. Disque de meule frontale en éventail selon l'une des revendications 7 à 9, caractérisé en ce que l'ancrage se compose de deux évidements (22) de la lamelle de meulage (13) ouverts latéralement, pour la prise des côtés frontaux de la fente concernée (12).
11. Disque de meule frontale en éventail selon l'une des revendications 7 à 10, caractérisé en ce qu'une bande plate en forme d'arc de cercle est passée à travers les évidements (21) de plusieurs lamelles de meulage (13) situées les unes à côté des autres.
12. Disque de meule frontale en éventail selon l'une des revendications précédentes, caractérisé en ce que les lamelles de meulage (13) sont collées sur le plateau de base (11).
EP86105702A 1985-07-18 1986-04-25 Machine à rectifier les surfaces Expired EP0212062B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86105702T ATE43985T1 (de) 1985-07-18 1986-04-25 Faecherstirnschleifscheibe.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3525620 1985-07-18
DE19853525620 DE3525620C1 (de) 1985-07-18 1985-07-18 Fächerstirnschleifscheibe
DE3541348 1985-11-22
DE3541348A DE3541348C1 (de) 1985-07-18 1985-11-22 Faecherstirnschleifscheibe

Publications (2)

Publication Number Publication Date
EP0212062A1 EP0212062A1 (fr) 1987-03-04
EP0212062B1 true EP0212062B1 (fr) 1989-06-14

Family

ID=25834096

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86105702A Expired EP0212062B1 (fr) 1985-07-18 1986-04-25 Machine à rectifier les surfaces

Country Status (4)

Country Link
US (1) US4718204A (fr)
EP (1) EP0212062B1 (fr)
CN (1) CN86102756B (fr)
DE (2) DE3541348C1 (fr)

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DE4020461C1 (en) * 1990-06-27 1991-07-18 Gerd Eisenblaetter Gmbh, 8192 Geretsried, De Face grinding disc tool - has replaceable grinding disc with backing disc having plastics rods
NZ280292A (en) * 1995-10-19 1999-11-29 Norton Co Accessory for angle grinder as rotatable annular tool with rest means for supporting grinder
US6066034A (en) * 1998-12-11 2000-05-23 Weiler Corporation V-shaped flap disc abrasive tool
GB2349109B (en) * 1999-04-23 2002-09-04 Elliott Ind Ltd Improvements in or relating to abrasive flap discs
EP1120198B1 (fr) 2000-01-28 2005-06-08 Werner Blättler Outil de meulage, dispositif ainsi équipé et procédé d'usinage de pièces mettant en oeuvre cet outil
DE20006127U1 (de) * 2000-04-03 2000-07-06 Lukas-Erzett Vereinigte Schleif- und Fräswerkzeugfabriken GmbH & Co KG, 51766 Engelskirchen Schleiflamelle und Schleifteller mit einer Mehrzahl von solchen
US6863596B2 (en) * 2001-05-25 2005-03-08 3M Innovative Properties Company Abrasive article
US6743085B2 (en) 2001-11-20 2004-06-01 3M Innovative Properties Company Rotating back up abrasive disc assembly
DE102004040901A1 (de) * 2004-03-31 2005-10-20 Stephan Rieth Schleifkopf für eine Schleifvorrichtung
WO2007093874A1 (fr) * 2006-02-13 2007-08-23 Miksa Marton Disque de poncage, dispositif et procede
CN100473502C (zh) * 2006-04-28 2009-04-01 四川省三台县固锐实业有限责任公司 平面砂布轮
US7892074B2 (en) * 2008-01-30 2011-02-22 3M Innovative Properties Company Surface modifying tool adapter using a plurality of surface modifying article inserts for use in a surface modifying system
ES2553006T3 (es) * 2012-09-18 2015-12-03 Ppr Gmbh Muela abrasiva de abanico
CN106670989A (zh) * 2017-01-12 2017-05-17 绵阳中研磨具有限责任公司 一种超薄网盖型平面砂布轮
CN106541341A (zh) * 2017-01-12 2017-03-29 绵阳中研磨具有限责任公司 一种锋利型平面砂布轮
WO2018156567A2 (fr) 2017-02-22 2018-08-30 Acs Industries, Inc. Tampon de décapage de sol segmenté rotatif
CN113696293B (zh) * 2021-09-07 2022-04-29 哈尔滨商业大学 一种基于纤维长度理论最优值的热磨机磨片设计方法

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US4133146A (en) * 1977-06-22 1979-01-09 Cola Charles R De Rotary abrasive tool

Also Published As

Publication number Publication date
CN86102756A (zh) 1987-01-14
US4718204A (en) 1988-01-12
DE3541348C1 (de) 1987-01-02
EP0212062A1 (fr) 1987-03-04
DE3663900D1 (en) 1989-07-20
CN86102756B (zh) 1988-05-11

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DE202004021149U1 (de) Rundbürste
DE3805719C2 (fr)

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