EP0222969B1 - Fächerstirnschleifscheibe - Google Patents

Fächerstirnschleifscheibe Download PDF

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Publication number
EP0222969B1
EP0222969B1 EP86105703A EP86105703A EP0222969B1 EP 0222969 B1 EP0222969 B1 EP 0222969B1 EP 86105703 A EP86105703 A EP 86105703A EP 86105703 A EP86105703 A EP 86105703A EP 0222969 B1 EP0222969 B1 EP 0222969B1
Authority
EP
European Patent Office
Prior art keywords
grinding
grinding wheel
flaps
wheel according
flap
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
EP86105703A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0222969A1 (de
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
Application filed by Individual filed Critical Individual
Priority to AT86105703T priority Critical patent/ATE44353T1/de
Publication of EP0222969A1 publication Critical patent/EP0222969A1/de
Application granted granted Critical
Publication of EP0222969B1 publication Critical patent/EP0222969B1/de
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 to overlap one another like a roof tile and can be clamped and project through radial slots in the circumferential zone.
  • Flap flap face grinding wheels can be used in a variety of ways. Lameia fan front grinding discs of this type are preferably used in so-called angle grinders. However, such lamella fan-type 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 discs in question are also suitable for other work such as deburring, faceting, rust removal or removing old paints.
  • materials such as steel, stainless steel, non-ferrous metals, aluminum, hard plastics, artificial stones, natural stones, wood or filler can be processed.
  • a flap face grinding wheel of the type mentioned at the outset 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 initial area 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 adjusted 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 in 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. The result of this is that the grinding wheel has to be stiff 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 flap disc of the type mentioned, in which the clamping of the grinding flaps directly, i.e. regardless of a grinding tool.
  • the base plate is designed as a sheet metal disc and that a support plate is arranged on the side of the base plate facing away from the working surface, that the support plate is firmly connected to the base plate at least on the outer circumference and that the rear ends of the grinding flaps between the base plate and the support plate are firmly clamped.
  • a further preferred embodiment of the invention provides that the side of the base plate and / or the support plate assigned to the rear ends of the grinding flaps are provided with protruding embossing points for engagement in the grinding flaps. This measure ensures that the grinding flaps are firmly and securely anchored.
  • a single embossing point or a single barb would suffice for each grinding lamella to ensure that the grinding lamella in question is attached between the base plate and the support plate in a particularly durable manner.
  • two barbs can also be provided per grinding flap, or a large number of barbs can be formed in a uniform distribution over the entire surface of the plate be det.
  • the embossing points or barbs dig into the material of the grinding lamella more and more. This increases the anchorage.
  • a particularly simple design of the barbs to achieve the advantages mentioned above is that they consist of a triangular sheet metal part, which are cut out of the material of the base plate or support plate to one side, on which they are bent out of the plate plane.
  • the support plate has radially extending tongues which are arranged at an incline in the circumferential direction.
  • This measure has the advantage that the individual slats can be pressed along the entire slot by the spring force of the tongues.
  • Another advantage is that the tongues can be produced in a simple manner if the support plate is provided with radial slots and the intermediate sections are rotated against the support plate plane
  • the firm connection of the support plate and the base plate is preferably achieved in that the peripheral edge of the base plate is bent toward the side facing away from its working surface towards a circumferential flange which is hook-shaped in radial section, and in that the support plate is clamped under the bent edge. In this way, the grinding wheel gets additional rigidity.
  • Sheet metal in particular light metal sheet, is used as the preferred material for the support plate.
  • the grinding flaps each have a thickening at their rear ends. These thickenings provide an additional safeguard against the fact that the grinding flaps slip out of their slots in spite of the clamping when in use, when particularly great tensile forces occur in use.
  • the thickening preferably consists of a clip which extends essentially over the entire width of the grinding flap in question.
  • This clamp can be attached to the grinding flap, for example by gluing or by riveting. It consists of a slotted tubular part, which can be pushed onto the end of the grinding flap and attached by gluing or riveting.
  • the thickening can be easily produced by attaching rivets along the rear end of the abrasive flap in question.
  • Another effective and easy to produce thickening also results from the fact that an adhesive bead is applied to the grinding flap.
  • the support plate is provided with tongues
  • the grinding lamellae have at least one slot-shaped recess in their rear areas, which are inserted through the slots.
  • This recess can be an opening in the grinding flap, which is completely surrounded by grinding flap material.
  • the grinding flaps are provided in their rear areas with projecting arms, into which the end faces of the slots provided in the support plate engage, and which extend beyond the longitudinal extent of the associated slot.
  • the manufacture of the grinding wheel according to the invention can be carried out with simple means and with little expenditure of time. Nevertheless, you get a grinding wheel, which is a self-contained and independent trading good that can be placed on a grinding tool by itself. In particular, when retrofitting the grinding tool, the operator does not have to take care that he himself clamps the grinding lamella in a reliable manner. Overall, the grinding wheel arrangement according to the invention is characterized in that it is easy to manufacture, works extremely reliably, and that a grinding tool can therefore be converted without problems.
  • 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 fan end grinding wheel.
  • the grinding wheel is designed such that grinding flaps 13 are attached to a base plate made of metal, preferably of an aluminum alloy, 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 are illustrated schematically in FIG. 2. In this way, through openings are created into which the rear ends of the grinding flaps 13 can be inserted.
  • the base plate 11 can be equipped with a bead 15, which is particularly suitable for heavy workloads, i.e. Flexing load, has a favorable effect on the dimensional stability of the base plate 11.
  • FIG. 3 illustrates, in a section through the base plate according to FIG. 1, the grinding flaps 13 in their position completely attached to the base plate 11.
  • the base plate 11 has on its outer circumference a peripheral flange 17 which is bent like a hook relative to the main plane of the base plate 11.
  • This peripheral flange can be flanged, for example.
  • the outer peripheral edge of the base plate 11 is bent more than 90 degrees to form the peripheral flange 17.
  • the peripheral flange 17 gives the base plate 11 an extraordinarily high torsional stiffness, which has a favorable effect on the dimensional stability during operation.
  • the slightly inwardly turned edges of the peripheral flange 17 form a circular opening.
  • the space which is enclosed by the peripheral flange 17 also widens from the peripheral edge of the peripheral flange 17 to the main plane of the base plate 11. It is thus possible to clamp an annular support plate 18 behind the peripheral edge of the peripheral flange 17. Such a ring creates a jamming of the rear lamella sections.
  • the rear area of the base plate 11, i.e. the area facing away from the grinding flaps 13 is covered by the support plate 18.
  • the support plate 18 is shown purely schematically in a partial section in FIG. 3 only in the left area.
  • the support plate can extend over the entire circular disk surface of the base plate 11, of course with the exception of the mounting hole that is always required. If the support plate 18 has a construction and in particular a strength and rigidity which roughly corresponds to the corresponding properties of the base plate 11, an extremely stable and rigid construction is produced.
  • the support plate 18 can be used to bend the rear ends of the grinding flaps 13 and at the same time to jam them.
  • the support plate 18 can be formed like the base plate 11 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.
  • the fastening of the grinding flaps 13 can be improved further by the fact that tongues 14 with stamping points 16 are formed on the support plate 18.
  • These embossing points 16 can be small elevations which are arranged on that side of the tongues 14 which face the grinding flaps 13.
  • edges of the tongues 14 could also be slightly angled and formed with sharp edges in the direction of the grinding lamellae 13, so that when the two discs are pressed in, the edge regions dig into the material of the grinding lamellae 13 so far that a secure anchoring of the grinding flaps 13 between base plate 11 and support plate 18 is ensured.
  • an alternative embodiment of the support plate 18 is also shown schematically in the lower region.
  • Two barbs 19 are formed on the tongue 14 shown below, which dig into the material of the grinding flaps 13 with their tips when the base plate and the support plate are pressed together, the tongues 14 being pressed into the body of the support plate 18.
  • the barbs 19 are produced in such a way that an angular slot is first made in a tongue 14.
  • the area of the tongue 14 enclosed by the angular slot is then bent out of the tongue plane against the direction in which the tongue protrudes from the base plate represents is.
  • 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, the barbs 19 dig into the material of the grinding flaps and thereby form an extraordinarily reliable fastening of the grinding flaps 13 between the base plate 11 and the support plate 18.
  • FIG. 4 only in the example of the upper tongue 14 is a dashed flap 13 shown in broken lines, which clarifies the assignment of the support plate 18 and the tongues 14 relative to the sanding flaps.
  • the tongues 14 are bent out of the plane of the drawing in the direction of the base plate and the slats 13. They spread out against the grinding flaps 13 and thereby prevent them from being pulled out of the entire grinding wheel.
  • the tongues 16 can be divided in their longitudinal direction into a plurality of tongue sections (not shown) in order to hold the associated grinding flaps 13 in a combination of clamping and gripping behind.
  • the tongues 14 are divided into three tongue sections. The middle train section is inserted through the recess 21 of the relevant grinding flap 13, while the two outer tongue sections press on the laterally adjacent flap sections.
  • FIG. 7 shows an example of a grinding flap 13 which, in addition to the recess 21, has lateral recesses 22 so that cantilevered grinding flap arms 23 are formed.
  • the end face of the slots made 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. 8 shows a further 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 in the example shown here is a clip which extends essentially over the entire width of a grinding flap.
  • This clamp can be attached to the grinding flap 13, for example by gluing or by riveting.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Disintegrating Or Milling (AREA)
  • Crushing And Grinding (AREA)
EP86105703A 1985-11-22 1986-04-25 Fächerstirnschleifscheibe Expired EP0222969B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86105703T ATE44353T1 (de) 1985-11-22 1986-04-25 Faecherstirnschleifscheibe.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3541347A DE3541347C1 (de) 1985-11-22 1985-11-22 Faecherstirnschleifscheibe
DE3541347 1985-11-22

Publications (2)

Publication Number Publication Date
EP0222969A1 EP0222969A1 (de) 1987-05-27
EP0222969B1 true EP0222969B1 (de) 1989-07-05

Family

ID=6286586

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86105703A Expired EP0222969B1 (de) 1985-11-22 1986-04-25 Fächerstirnschleifscheibe

Country Status (6)

Country Link
US (1) US4679360A (enrdf_load_stackoverflow)
EP (1) EP0222969B1 (enrdf_load_stackoverflow)
JP (1) JPS62124878A (enrdf_load_stackoverflow)
CN (1) CN86107803B (enrdf_load_stackoverflow)
AT (1) ATE44353T1 (enrdf_load_stackoverflow)
DE (2) DE3541347C1 (enrdf_load_stackoverflow)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4961807A (en) * 1988-05-14 1990-10-09 Hirokazu Ichiguchi Method of producing grinding tool and apparatus for producing same
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
JPH05245768A (ja) * 1993-01-29 1993-09-24 Yoshinori Uematsu 研磨布紙ディスク
US5752876A (en) * 1995-10-23 1998-05-19 Weiler Brush Company, Inc. Flap disc abrasive tool
US5951389A (en) * 1995-10-23 1999-09-14 Weiler Corporation Drive system for small diameter abrasive discs
FR2768955B1 (fr) * 1997-10-01 1999-11-05 Norton Sa Disque abrasif
DE19812515A1 (de) * 1998-03-21 1999-09-23 M & F Entw & Patentverwertungs Lamellenschleifwerkzeug
DE19853550C1 (de) * 1998-11-20 2000-03-09 Ver Schmirgel & Maschf Fächerschleifscheibe
US6066034A (en) * 1998-12-11 2000-05-23 Weiler Corporation V-shaped flap disc abrasive tool
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
US7144194B2 (en) * 2004-04-22 2006-12-05 Kipp Jr John H Surface finisher
DE102006024015A1 (de) * 2006-05-23 2007-11-29 August Rüggeberg Gmbh & Co. Kg Fächer-Schleifscheibe
DE202008014496U1 (de) * 2008-06-04 2009-01-15 August Rüggeberg Gmbh & Co. Kg Fächer-Schleifscheibe
DE102010030598A1 (de) * 2010-06-28 2011-12-29 Robert Bosch Gmbh Handwerkzeugschutzvorrichtung
CN102615557A (zh) * 2012-04-11 2012-08-01 重庆邓氏厨具制造有限公司 锻打不锈钢刀沙带水磨工艺
DE102015115313B4 (de) * 2015-09-10 2017-08-10 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Schleifwerkzeug und dessen Verwendung zur computergesteuerten Nachbearbeitung gefräster Freiformflächen
KR102263271B1 (ko) 2017-02-22 2021-06-10 에이씨에스 인더스트리즈, 인크. 회전식 세그먼트형 바닥 스트리핑 패드

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1445295A (en) * 1919-11-21 1923-02-13 Cangen Mark Shoe-heel buffer
US1869564A (en) * 1930-03-10 1932-08-02 David R Johnston Polishing tool
US2907147A (en) * 1957-12-23 1959-10-06 F L & J C Codman Company Radial face rotary buffing element
DE1652890A1 (de) * 1967-02-07 1970-01-08 Guido Cremonese Scheibe mit Vorrichtung zum Einbetten und Fixieren von geschichteten Schleifmitteltraegern
US3616581A (en) * 1969-10-08 1971-11-02 Gen Electric Polishing and grinding rotary finishing tool
GB1370846A (en) * 1972-02-22 1974-10-16 Taf Tele Abrasive Flessibili D Rotary abrading device
DE2359483A1 (de) * 1973-11-29 1975-06-12 Wegoma Maschinen Ohg Weiss & G Schleifpapierhalterung fuer tellerschleifmaschinen
JPS5225683B2 (enrdf_load_stackoverflow) * 1974-07-19 1977-07-09
US4133146A (en) * 1977-06-22 1979-01-09 Cola Charles R De Rotary abrasive tool

Also Published As

Publication number Publication date
JPS62124878A (ja) 1987-06-06
JPH044108B2 (enrdf_load_stackoverflow) 1992-01-27
EP0222969A1 (de) 1987-05-27
DE3664187D1 (en) 1989-08-10
CN86107803A (zh) 1987-05-27
CN86107803B (zh) 1988-03-02
US4679360A (en) 1987-07-14
ATE44353T1 (de) 1989-07-15
DE3541347C1 (de) 1986-10-30

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