EP0387246B1 - Abrasive foil and abrasion process - Google Patents
Abrasive foil and abrasion process Download PDFInfo
- Publication number
- EP0387246B1 EP0387246B1 EP87907926A EP87907926A EP0387246B1 EP 0387246 B1 EP0387246 B1 EP 0387246B1 EP 87907926 A EP87907926 A EP 87907926A EP 87907926 A EP87907926 A EP 87907926A EP 0387246 B1 EP0387246 B1 EP 0387246B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- abrasive
- foil
- magnetic
- support
- adhesive backing
- 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
Links
- 239000011888 foil Substances 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 8
- 238000005299 abrasion Methods 0.000 title abstract 2
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 24
- 239000000853 adhesive Substances 0.000 claims abstract description 24
- 230000001070 adhesive effect Effects 0.000 claims abstract description 24
- 239000010959 steel Substances 0.000 claims abstract description 24
- 238000001816 cooling Methods 0.000 claims abstract description 10
- 230000035515 penetration Effects 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000000227 grinding Methods 0.000 description 23
- 238000000576 coating method Methods 0.000 description 7
- 239000011248 coating agent Substances 0.000 description 6
- 239000011230 binding agent Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 238000005304 joining Methods 0.000 description 4
- 239000003082 abrasive agent Substances 0.000 description 3
- 239000000155 melt Substances 0.000 description 3
- 244000061456 Solanum tuberosum Species 0.000 description 2
- 235000002595 Solanum tuberosum Nutrition 0.000 description 2
- 239000006061 abrasive grain Substances 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 210000003298 dental enamel Anatomy 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 235000012015 potatoes Nutrition 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- 244000000626 Daucus carota Species 0.000 description 1
- 235000002767 Daucus carota Nutrition 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 206010020751 Hypersensitivity Diseases 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 229920000180 alkyd Polymers 0.000 description 1
- 230000007815 allergy Effects 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000009837 dry grinding Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005686 electrostatic field Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000037380 skin damage Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D11/00—Constructional features of flexible abrasive materials; Special features in the manufacture of such materials
Definitions
- Sanding film and grinding process Sanding film, an abrasive on flexible film as an abrasive base with special properties such as high thermal conductivity, heat resistance and tear resistance, instead of, or in combination with, other underlays for abrasives, such as paper or fabric, and a grinding process for the production of self-cooling grinding surfaces
- Sanding film, an abrasive on flexible film as an abrasive base with special properties such as high thermal conductivity, heat resistance and tear resistance instead of, or in combination with, other underlays for abrasives, such as paper or fabric
- a grinding process for the production of self-cooling grinding surfaces
- thermoplastic film is known from the old German application of the Naxosunion, Frankfurt / Main, "grinding and polishing film and process for its production", from October 16, 1950 - August 30, 1951, PA 700102, page 495-504, and is said to be in contrast to Do not break paper or tissue underlays, since the binding agent cannot penetrate into the non-porous film.
- These thermoplastic films have far too little heat resistance for the intended purpose.
- the usual abrasive layers also have poor thermal conductivity. The mechanical strength is reduced the poor heat dissipation greatly affects and therefore often leads to the premature destruction of the abrasive pad before the abrasive coating could be used sufficiently.
- the gripping ends of sanding sheets on orbital sanders that require tight clamping are particularly torn.
- Two complex clamping devices are arranged for clamping and the clamping ends of the sanding sheet are lost for grinding. Grinding disks pose a constant risk of accidents due to the possible bursting, especially when the often annoying protective hood is removed. Cool grinding is often only possible by adding cooling emulsion.
- abrasive film was made known by United States patent 2,292,991 "FLEXIBLE ABRASIVE PRODUCT".
- soft metal foils are proposed as abrasive pads in the thickness ranges from 0.0005 to 0.015 inch. This thickness is 0.0125 to 0.375 mm.
- mild steel is mentioned as the material for the abrasive pad.
- the metal foils consist of soft metals and a coating of a soft metal, which serves as a binder, has a lower melting point and is melted by the action of heat and sprinkled with the abrasive material, with part of the abrasive grain in the metal foil and part in the melt by rolling is embedded.
- this patent specification there is no place in this patent specification that describes anything about the attachment of the abrasive film on a receiving surface.
- the Velcro fastener which was already described in 1959 in the monthly publication Popular Mechanics, March edition, volume 8, issue 3, page 28, as an attachment means for clothing and upholstery, enables an exchange of sanding sheets on rotating sanding pads: "Attachment with nylon strips ".
- the attachment of sanding sheets was shown for the first time at the Hanover Industrial Fair in 1987.
- One side of the closure is glued to the sandpaper, the other to the holder. After the abrasive has been used up, it is thrown away with the closure part, which makes the sanding paper quite expensive.
- Precise joining is difficult, static electricity can hardly be dissipated and the many small gaps in the Velcro fastener make cleaning very difficult.
- Another disadvantage is the pressure to be used when joining. Sterilization requires easy cleaning, so that applications in the food sector are hardly considered.
- Abrasive body with an abrasive film consisting of an abrasive on a flexible abrasive pad, and with a receptacle, which is provided on its working surface with an adhesive pad for firmly holding the abrasive film, characterized in that the abrasive pad made of steel strip foil with a thickness of 0, 05 to 0.025 mm exists that the adhesive pad is permanently magnetic, that the steel strip foil has holding parts directed at right angles to the receiving surface in the form of inner flanges of this foil, that the receiving surface for receiving the annular, tubular inner flanging collar has congruent blind and / or through holes, these also as suction holes , has, the inner flanges on the one hand act as cooling elements, and on the other hand serve as a cover between the sanding film and the adhesive pad and certainly prevent the penetration of chips and abrasive wear, and the frictional magnetic adhesion of the adhesive pad due to its r Magnetic force acting at right angles to the receiving surface holds the
- a process for producing an abrasive body by attaching a quick-dissolving abrasive film to a holder with an adhesive pad for firmly holding the abrasive film characterized in that a steel strip film has a thickness from 0.05 to 0.25 mm is coated with an abrasive, that the band steel foil is provided with holding parts in the form of inner flanges, in each case by widening a hole in the foil in such a way that an annular, tubular part is obtained so that the receiving surface is provided with a permanent magnetic adhesive pad and with congruent recesses to the inner flanges of the strip steel foil, the grinding foil being connected to the receptacle in such a way that the inner flanges are cooling elements on the one hand and on the other hand serve as a cover between the grinding foil and the adhesive pad and certainly the penetration of chips and abrasive wear
- strip steels are also produced in very small thicknesses and it is customary to refer to thicknesses between 0.025 and 0.25 mm as strip steel foils.
- the steel strip according to DIN 1624/1544 was found to be inexpensive and well usable steel strip and steel foil foils made of this material can be used as abrasive pads from 0.05 mm. (This is half the thickness of a thin typewriter paper)
- a practical, safe and inexpensive adhesive pad on the receiving surface is a permanent magnetic magnetic film.
- anisotropic magnetization it has the greatest adhesive force and, with a thickness of 1.5 mm, is up to all requirements that can arise during grinding.
- a special embodiment of the invention leads to the reduction of the magnetic foil thickness to 1 mm with simultaneous strengthening of the shear strength and cooling, moreover a precise joining is used to switch off one Unbalance reached.
- the sanding film is provided with holding parts which are directed at right angles.
- the receptacles for the grinding films have congruent recesses.
- the preferred holding parts are in the form of inner flanges which are obtained in a material-saving manner by deforming the steel strip foil by widening a hole so that an annular, tubular part is obtained. This is the inner flange.
- the corresponding recess in the receptacle is a blind or through hole.
- Two spaced inner flanges ensure that the abrasive film lies precisely on when joining. Depending on the material thickness and number of inner flanges, shear forces occurring during grinding can be absorbed accordingly. The calculation can be carried out in the same way as for hollow rivets, whereby the shear strength can assume high values even with thin strip steel foils.
- the requirement is that they be underlaid with a steel sheet underlay of approximately 0.2 mm thick on an insulating plate of approximately 4 mm thick in order to obtain a sufficiently high adhesive force.
- suction holes are provided in the receptacle for extracting the grinding dust. Then the inner flanging and hole arrangements in the magnetic foil, the sheet steel underlay and the insulating plate are arranged congruently with the suction holes. This has the advantage that penetration of grinding dust between magnetic film and grinding film is prevented with certainty by the inner flare.
- the grinding foil-band steel underlays are expediently used in accordance with their tensile strengths that increase with thickness, namely for 0.05 to 0.25 mm for very fine, fine, medium and coarse grains.
- the through holes act as cooling aids due to the air swirling, even without extraction in the holders for grinding foils.
- the good heat resistance of the steel strip film naturally offers, in addition to the usual binders, such as phenol and alkyd resins, also binders of higher heat resistance, such as the powder coatings made of epoxy and polyurethane resins and also the organic-inorganic Ormosile, but also a ceramic bond, such as glaze and enamel melts, as used for example in the enamel industry for the continuous coating of steel strips, whereby, as is customary in the abrasive industry, coating is also carried out in an electrostatic field , so that the melt is granulated instead of the sticky resin.
- binders such as phenol and alkyd resins
- binders of higher heat resistance such as the powder coatings made of epoxy and polyurethane resins and also the organic-inorganic Ormosile
- a ceramic bond such as glaze and enamel melts
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Polishing Bodies And Polishing Tools (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
Description
Schleiffolie und Schleifverfahren:Schleiffolie,ein Schleifmittel auf flexibler Folie als Schleifmittelunterlage mit besonderen Eigenschaften,wie großer Wärmeleitfähigkeit,Wärmefestigkeit und Zerreißfestigkeit,anstelle von,oder auch inKombination mit,anderen Unterlagen für Schleifmittel,wie Papier oder Gewebe und ein Schleifverfahren zur Herstellung von selbstkühlenden Schleifflächen zum löslichen Auswechseln auf ruhenden,rotierenden,oszillierenden Aufnahmen mit entsprechend ausgebildeten Oberflächen zum festen und sicheren Halten während des Schleifens,zur Verminderung der Unfallgefahr,für viele Anwendungen anstelle von keramisch- oder kunststoffgebundenen Schleifscheiben,besonders auch zum kühlen Trockenschliff durch die gute Wärmeleitung der Folienunterlage,ohne Kühlemulsion zur Vermeidung von Hautschäden, Allergien,Kauf,Lagerung,Zuführung und Entsorgung.Sanding film and grinding process: Sanding film, an abrasive on flexible film as an abrasive base with special properties such as high thermal conductivity, heat resistance and tear resistance, instead of, or in combination with, other underlays for abrasives, such as paper or fabric, and a grinding process for the production of self-cooling grinding surfaces For soluble replacement on stationary, rotating, oscillating receptacles with appropriately designed surfaces for firm and safe holding during grinding, to reduce the risk of accidents, for many applications instead of ceramic or plastic-bonded grinding wheels, especially also for cool dry grinding due to the good heat conduction of the film base , without cooling emulsion to avoid skin damage, allergies, purchase, storage, supply and disposal.
Eine Thermoplastfolie ist durch die deutsche Altanmeldung der Naxosunion,Frankfurt/Main,"Schleif- und Polierfolie und Verfahren zu deren Herstellung",vom 16.10.1950 - 30.8.1951,PA 700102, Seite 495-504,bekannt geworden und soll im Gegensatz zu Papier- oder Gewebeunterlagen nicht brechen, da hier das Eindringen des Bindemittels in die porenfreie Folie nicht erfolgen kann.Diese Thermoplastfolien haben für den vorgesehenen Zweck eine viel zu geringe Wärmebeständigkeit.Auch die gebräuchlichen Schleifmittelunterlagen weisen außerdem eine schlechte Wärmeleitfähigkeit auf.Die mechanische Festigkeit wird durch die mangelhafte Wärmeableitung stark beeinträchtigt und führt daher oft zur vorzeitigen Zerstörung der Schleifmittelunterlage, noch bevor der Schleifbelag ausreichend genutzt werden konnte. So zerreißen die Einspannenden von Schleifblättern bei Schwingschleifern, (Vibrationsschleifern) die ein strammes Einspannen erfordern, besonders häufig. Zum Einspannen sind zwei aufwendige Klemmvorrichtungen angeordnet und die Einspannenden des Schleifblattes gehen für das Schleifen verloren.
Eine stetige Unfallgefahr bilden Schleifscheiben durch das mögliche Zerspringen, besonders wenn die oft störende Schutzhaube entfernt wird. Kühles Schleifen ist häufig nur durch die Zufuhr von Kühlemulsion möglich.A thermoplastic film is known from the old German application of the Naxosunion, Frankfurt / Main, "grinding and polishing film and process for its production", from October 16, 1950 - August 30, 1951, PA 700102, page 495-504, and is said to be in contrast to Do not break paper or tissue underlays, since the binding agent cannot penetrate into the non-porous film. These thermoplastic films have far too little heat resistance for the intended purpose. The usual abrasive layers also have poor thermal conductivity. The mechanical strength is reduced the poor heat dissipation greatly affects and therefore often leads to the premature destruction of the abrasive pad before the abrasive coating could be used sufficiently. For example, the gripping ends of sanding sheets on orbital sanders (vibratory grinders) that require tight clamping are particularly torn. Two complex clamping devices are arranged for clamping and the clamping ends of the sanding sheet are lost for grinding.
Grinding disks pose a constant risk of accidents due to the possible bursting, especially when the often annoying protective hood is removed. Cool grinding is often only possible by adding cooling emulsion.
Eine weitere Schleiffolie wurde durch das USA-Patent 2 292 991 "FLEXIBLE ABRASIVE PRODUKT" bekannt. Hier werden weiche Metallfolien als Schleifmittelunterlagen vorgeschlagen in den Dickenbereichen von 0,0005 bis 0,015 inch. Diese Dicke beträgt 0,0125 bis 0,375 mm. Auf Seite 1, Zeile 33 wird als Material für die Schleifmittelunterlage Weichstahl genannt. Die Metallfolien bestehen aus Weichmetallen und einer Beschichtung aus einem Weichmetall, welches als Bindemittel dient, einen niedrigeren Schmelzpunkt aufweist und durch Wärmeeinwirkung zum Schmelzen gebracht und mit dem Schleifmaterial bestreut wird, wobei durch Walzen ein Teil des Schleifkorns in der Metallfolie und ein Teil in die Schmelze eingebettet wird. Es findet sich aber keine Stelle in dieser Patentschrift, die etwas über das Befestigen der Schleiffolie auf einer Aufnahme-Fläche beschreibt.Another abrasive film was made known by United States patent 2,292,991 "FLEXIBLE ABRASIVE PRODUCT". Here soft metal foils are proposed as abrasive pads in the thickness ranges from 0.0005 to 0.015 inch. This thickness is 0.0125 to 0.375 mm. On page 1, line 33, mild steel is mentioned as the material for the abrasive pad. The metal foils consist of soft metals and a coating of a soft metal, which serves as a binder, has a lower melting point and is melted by the action of heat and sprinkled with the abrasive material, with part of the abrasive grain in the metal foil and part in the melt by rolling is embedded. However, there is no place in this patent specification that describes anything about the attachment of the abrasive film on a receiving surface.
Ein Auswechseln von Schleifblättern auf rotierenden Schleiftellern durch schnellösliches Befestigen ermöglicht der Klettverschluß, der bereits im Jahre 1959 in der Monatsschrift Populäre Mechanik, Ausgabe März, Band 8, Heft 3, Seite 28, als Befestigungsmittel für Kleidung und Polster beschrieben wird: "Befestigen mit Nylonstreifen". Erstmalig wurde das Befestigen von Schleifblättern auf der Industriemesse Hannover 1987 gezeigt . Die eine Seite des Verschlusses wird mit dem Schleifpapier, die andere mit der Aufnahme verklebt. Nach Verbrauch des Schleifmittels wird dieses mit dem Verschlußteil fortgeworfen, wodurch das Schleifpapier recht teuer wird. Ein punktgenaues Fügen ist schwierig, statische Elektrizität kaum abzuleiten und die vielen kleinen Zwischenräume des Klettverschlusses erschweren das Reinigen sehr. Nachteilig ist auch der beim Fügen aufzuwendende Druck. Sterilisieren setzt das leichte Reinigen voraus, so daß Anwendungen im Lebensmittelbereich kaum in Betracht kommen.The Velcro fastener, which was already described in 1959 in the monthly publication Popular Mechanics, March edition, volume 8, issue 3, page 28, as an attachment means for clothing and upholstery, enables an exchange of sanding sheets on rotating sanding pads: "Attachment with nylon strips ". The attachment of sanding sheets was shown for the first time at the Hanover Industrial Fair in 1987. One side of the closure is glued to the sandpaper, the other to the holder. After the abrasive has been used up, it is thrown away with the closure part, which makes the sanding paper quite expensive. Precise joining is difficult, static electricity can hardly be dissipated and the many small gaps in the Velcro fastener make cleaning very difficult. Another disadvantage is the pressure to be used when joining. Sterilization requires easy cleaning, so that applications in the food sector are hardly considered.
Schleifbeläge zum Abschleifen der Schalen werden bei Gemüse- und Getreide-Schälmaschinen verwendet. Hierbei wird in Handarbeit im Schleifmittelwerk ein Schleifbelag aus einer Masse aus Schleifmittelkörnern und Bindemittel in einer Dicke von ca.5-25 mm auf die verschiedenen Schälteile, wie Schälteller, Schältrommel und Schälsegmente aufgebracht und im Ofen gehärtet. Dafür müssen die abgenutzten Schälteile also immer zum Schleifmittelwerk transportiert werden,wodurch ein erheblicher Kostenaufwand entsteht. Nachteilig ist die Anschaffung von zwei Schälmaschinen,eine für Kartoffeln und eine für Karotten, obwohl die Bauart die gleiche ist. Kartoffeln benötigen aber einen gröberen Schleifbelag. Ein ständiges Umbauen der Maschine ist zu aufwendig.Grinding surfaces for grinding the peels are used in vegetable and grain peeling machines. Here In the handwork in the abrasives factory, an abrasive coating made from a mass of abrasive grains and binders with a thickness of approx. 5-25 mm is applied to the various peeling parts, such as peeling plate, peeling drum and peeling segments and hardened in the oven. To do this, the worn peeling parts must always be transported to the abrasive plant, which results in considerable costs. The disadvantage is the purchase of two peeling machines, one for potatoes and one for carrots, although the design is the same. But potatoes need a coarser abrasive coating. Constantly rebuilding the machine is too complex.
Schleifkörper,mit einer Schleiffolie,die aus einem Schleifmittel auf einer flexiblen Schleifmittelunterlage besteht, und mit einer Aufnahme, die auf ihrer Arbeitsfläche mit einer Haftauflage zum festen Halten der Schleiffolie versehen ist, dadurch gekennzeichnet, daß die Schleifmittelunterlage aus Bandstahlfolie in der Dicke von 0,05 bis 0,025 mm besteht, daß die Haftauflage permanentmagnetisch ist, daß die Bandstahlfolie rechtwinklig zur Aufnahmefläche gerichtete Halteteile in Form von Innenbördeln dieser Folie aufweist, daß die Aufnahmefläche zum Aufnehmen der ringförmigen, rohrartigen Innnenbördelkragen deckungsgleiche Sack- und/oder Durchgangslöcher, diese auch als Absaugelöcher, besitzt, wobei die Innenbördel einerseits als Kühlelemente wirken, und andererseits als Abdeckung zwischen Schleiffolie und Haftauflage dienen und mit Sicherheit das Eindringen von Spänen und Schleifabrieb verhindern, und wobei die kraftschlüssige Magnethaftung der Haftauflage durch ihre rechtwinklig zur Aufnahmefläche wirkende Magnetkraft die Schleiffolie am Ort festhält, so daß diese magnetische Haftkraft zusammen mit den in den Löchern eingerasteten Halteteilen einen kraft- und formschlüssigen Verbund von Schleiffolie und Aufnahme ergibt. Verfahren zur Herstellung eines Schleifkörpers durch Anbringen einer schnellöslichen Schleiffolie auf einer Aufnahme mit einer Haftauflage zum festen Halten der Schleiffolie,dadurch gekennzeichnet, daß eine Bandstahlfolie in der Dicke von 0,05 bis 0,25 mm mit einem Schleifmittel beschichtet wird, daß die Bandstahlfolie mit Halteteilen in Form von Innenbördeln versehen wird, indem jeweils ein Loch in der Folie so aufgeweitet wird, daß ein ringförmiges, rohrartiges Teil erhalten wird, daß die Aufnahmefläche mit einer permanentmagnetischen Haftauflage und mit zu den Innenbördeln der Bandstahlfolie deckungsgleichen Ausnehmungen versehen wird, wobei die Schleiffolie mit der Aufnahme so verbunden wird, daß die Innenbördel einerseits Kühlelemente sind und andererseits als Abdeckung zwischen Schleiffolie und Haftauflage dienen und mit Sicherheit das Eindringen von Spänen und Schleifabrieb verhindern, daß die kraftschlüssige Magnethaftung der Haftauflage durch ihre rechtwinklig zur Aufnahmefläche wirkende Magnetkraft die Schleiffolie am Ort festhält, so daß diese magnetische Haftkraft zusammen mit den in den Löchern eingerasteten Halteteilen einen kraft- und formschlüssigen Verbund von Schleiffolie und Aufnahme ergibt.Abrasive body, with an abrasive film consisting of an abrasive on a flexible abrasive pad, and with a receptacle, which is provided on its working surface with an adhesive pad for firmly holding the abrasive film, characterized in that the abrasive pad made of steel strip foil with a thickness of 0, 05 to 0.025 mm exists that the adhesive pad is permanently magnetic, that the steel strip foil has holding parts directed at right angles to the receiving surface in the form of inner flanges of this foil, that the receiving surface for receiving the annular, tubular inner flanging collar has congruent blind and / or through holes, these also as suction holes , has, the inner flanges on the one hand act as cooling elements, and on the other hand serve as a cover between the sanding film and the adhesive pad and certainly prevent the penetration of chips and abrasive wear, and the frictional magnetic adhesion of the adhesive pad due to its r Magnetic force acting at right angles to the receiving surface holds the abrasive film in place, so that this magnetic adhesive force together with the holding parts engaged in the holes results in a non-positive and form-fitting bond between the abrasive film and the holder. A process for producing an abrasive body by attaching a quick-dissolving abrasive film to a holder with an adhesive pad for firmly holding the abrasive film, characterized in that a steel strip film has a thickness from 0.05 to 0.25 mm is coated with an abrasive, that the band steel foil is provided with holding parts in the form of inner flanges, in each case by widening a hole in the foil in such a way that an annular, tubular part is obtained so that the receiving surface is provided with a permanent magnetic adhesive pad and with congruent recesses to the inner flanges of the strip steel foil, the grinding foil being connected to the receptacle in such a way that the inner flanges are cooling elements on the one hand and on the other hand serve as a cover between the grinding foil and the adhesive pad and certainly the penetration of chips and abrasive wear Prevent the frictional magnetic adhesion of the adhesive pad by the magnetic force acting perpendicular to the receiving surface holds the abrasive film in place, so that this magnetic adhesive force together with the holding parts locked in the holes, a non-positive and form-fitting combination of abrasive film and recording ahme results.
Bekanntlich werden Bandstähle auch in sehr geringen Dicken hergestellt und es ist üblich, Dicken zwischen 0,025 und 0,25 mm als Bandstahlfolien zu bezeichnen. Als preiswerter und gut brauchbarer Bandstahl wurde der Bandstahl nach DIN 1624/1544 gefunden und Bandstahlfolien aus diesem Material sind ab 0,05 mm als Schleifmittelunterlagen brauchbar. (Das ist die Hälfte der Dicke eines dünnen Schreibmaschinenpapiers) Als brauchbares rostbeständiges Material, das ab 0,07 mm hergestellt wird, wurde der Bandstahl der Werkstoffnummer 1.4016 befunden, der aufgrund seines hohen Preises für Sonderzwecke in Betracht kommt, wie z.B. als Unterlage für Diamantkörnung.As is known, strip steels are also produced in very small thicknesses and it is customary to refer to thicknesses between 0.025 and 0.25 mm as strip steel foils. The steel strip according to DIN 1624/1544 was found to be inexpensive and well usable steel strip and steel foil foils made of this material can be used as abrasive pads from 0.05 mm. (This is half the thickness of a thin typewriter paper) As a usable rust-resistant material, which is manufactured from 0.07 mm, the steel strip of material number 1.4016 was found, which is due to its high price for special purposes, such as as a base for diamond grit.
Eine praktische, sichere und dabei preiswerte Haftauflage auf der Aufnahme-Fläche ist eine permanentmagnetische Magnetfolie. Sie weist bei anisotroper Magnetisierung die größte Haftkraft auf und ist in einer Dicke von 1,5 mm allen Anforderungen, die beim Schleifen auftreten können, gewachsen. Eine besondere Ausgestaltung der Erfindung führt zur Reduzierung der Magnetfoliendicke auf 1 mm bei gleichzeitiger Verstärkung der Scherfestigkeit und Kühlung, außerdem wird dabei ein punktgenaues Fügen zur Ausschaltung einer Unwucht erreicht. Hierzu wird die Schleiffolie mit Halteteilen versehen, die rechtwinklig gerichtet sind. Die Aufnahmen für die Schleiffolien weisen hierfür deckungsgleiche Ausnehmungen auf. Die bevorzugten Halteteile haben die Form von Innenbördeln, die materialsparend durch Verformung der Bandstahlfolie erhalten werden, indem ein Loch so aufgeweitet wird, daß ein ringförmiges, rohrartiges Teil erhalten wird. Das ist der Innenbördel. Die entsprechende Ausnehmung in der Aufnahme ist ein Sack- oder Durchgangsloch. Zwei im Abstand angeordnete Innenbördel bewirken beim Fügen ein punktgenaues Aufliegen der Schleiffolie. Je nach Materialdicke und Anzahl der Innenbördel können entsprechend beim Schleifen auftretende Scherkräfte aufgenommen werden. Die Berechnung kann wie bei Hohlnieten erfolgen, wobei die Scherfestigkeit auch bei dünnen Bandstahlfolien große Werte annehmen kann. Bei den genannten Magnetfoliendicken ist die Voraussetzung das Unterlegen mit einer Stahlblechunterlage von ca. 0,2 mm Dicke auf einer Isolierplatte von ca. 4 mm Dicke, um eine genügend hohe Haftkraft zu erhalten. Bei manchen Schleifmaschinen sind in der Aufnahme Absaugelöcher zum Absaugen des Schleifstaubes vorgesehen. Dann werden die Innenbördel- und Lochanordnungen in der Magnetfolie, der Stahlblechunterlage und der Isolierplatte deckungsgleich zu den Absaugelöchern angeordnet. Hierbei ergibt sich der Vorteil, daß durch die Innenbördel ein Eindringen von Schleifstaub zwischen Magnetfolie und Schleiffolie mit Sicherheit verhindert wird.A practical, safe and inexpensive adhesive pad on the receiving surface is a permanent magnetic magnetic film. With anisotropic magnetization, it has the greatest adhesive force and, with a thickness of 1.5 mm, is up to all requirements that can arise during grinding. A special embodiment of the invention leads to the reduction of the magnetic foil thickness to 1 mm with simultaneous strengthening of the shear strength and cooling, moreover a precise joining is used to switch off one Unbalance reached. For this purpose, the sanding film is provided with holding parts which are directed at right angles. For this purpose, the receptacles for the grinding films have congruent recesses. The preferred holding parts are in the form of inner flanges which are obtained in a material-saving manner by deforming the steel strip foil by widening a hole so that an annular, tubular part is obtained. This is the inner flange. The corresponding recess in the receptacle is a blind or through hole. Two spaced inner flanges ensure that the abrasive film lies precisely on when joining. Depending on the material thickness and number of inner flanges, shear forces occurring during grinding can be absorbed accordingly. The calculation can be carried out in the same way as for hollow rivets, whereby the shear strength can assume high values even with thin strip steel foils. In the case of the magnetic film thicknesses mentioned, the requirement is that they be underlaid with a steel sheet underlay of approximately 0.2 mm thick on an insulating plate of approximately 4 mm thick in order to obtain a sufficiently high adhesive force. With some grinding machines, suction holes are provided in the receptacle for extracting the grinding dust. Then the inner flanging and hole arrangements in the magnetic foil, the sheet steel underlay and the insulating plate are arranged congruently with the suction holes. This has the advantage that penetration of grinding dust between magnetic film and grinding film is prevented with certainty by the inner flare.
Da die Scherkräfte beim Schleifen mit ansteigender Körnungsgröße anwachsen, werden die Schleiffolien-Bandstahl-Unterlagen zweckmäßig entsprechend ihren mit der Dicke anwachsenden Zugfestigkeiten verwendet und zwar für 0,05 bis 0,25 mm für sehr feine, feine, mittlere und grobe Körnungen.Since the shear forces increase during grinding with increasing grain size, the grinding foil-band steel underlays are expediently used in accordance with their tensile strengths that increase with thickness, namely for 0.05 to 0.25 mm for very fine, fine, medium and coarse grains.
Auch ohne Absaugung bei den Aufnahmen für Schleiffolien wirken die Durchgangslöcher, besonders bei rotierenden Schleiftellern, als Kühlhilfen durch die Luftverwirbelung.The through holes, especially with rotating sanding discs, act as cooling aids due to the air swirling, even without extraction in the holders for grinding foils.
Durch die gute Wärmefestigkeit der Bandstahlfolie bieten sich naturgemäß neben den gebräuchlichen Bindemitteln, wie Phenol- und Alkyd-Harze, auch Bindemittel höherer Wärmefestigkeit an, wie die Pulverlacke aus Epoxyd- und Polyurethan-Harzen und auch die organisch-anorganischen Ormosile, aber auch eine keramische Bindung, wie Glasur- und Emailleschmelzen, wie sie beispielsweise in der Emailleindustrie zum kontinuierlichen Beschichten von Bandstahl verwendet werden, wobei gleichfalls, wie in der Schleifmittelindustrie üblich, das Beschichten im elektrostatischem Feld vorgenommen wird, so daß anstelle des klebrigen Harzes die Schmelze bekörnt wird.The good heat resistance of the steel strip film naturally offers, in addition to the usual binders, such as phenol and alkyd resins, also binders of higher heat resistance, such as the powder coatings made of epoxy and polyurethane resins and also the organic-inorganic Ormosile, but also a ceramic bond, such as glaze and enamel melts, as used for example in the enamel industry for the continuous coating of steel strips, whereby, as is customary in the abrasive industry, coating is also carried out in an electrostatic field , so that the melt is granulated instead of the sticky resin.
Claims (2)
- An abrasive wheel comprising an abrasive foil which consists of an abrasive medium on a flexible abrasive backing and a support which has an adhesive backing on its working surface for firmly holding the abrasive foil, characterized in that the abrasive backing consists of a foil of steel strip having a thickness of 0.05 to 0.25 mm, the adhesive backing is permanently magnetic, the foil of steel strip has holding elements in the form of inner flanges of this foil, which are directed at right angles to the support surface, the support surface has congruent blind or throughholes also used as suction holes for receiving the annular, tube-like inner flange collars, the inner flanges acting, on the one hand, as cooling elements and, on the other, serving as covers between abrasive foil and adhesive backing and reliably preventing the penetration of splinters and abrasive grit, and the force-locked magnetic adhesion of the adhesive backing secures the abrasive foil at its place by its magnetic forces acting at right angles on the support surface so that these magnetic adhesive forces together with the holding elements locked into the holes result in a force-locked and non-positive interlocking of abrasive foil and support.
- A process for the production of an abrasive wheel according to claim 1 by applying a quick-release abrasive foil on a support with an adhesive backing for firmly holding the abrasive foil, characterized in that a steel strip foil with a thickness of 0.05 to 0.25 mm is coated with an abrasive, the steel strip foil is provided with holding elements in the form of inner flanges by respectively expanding one hole in the foil so that an annular, tube-like portion is obtained, the support is provided with a permanently magnetic adhesive backing and with recesses congruent to the inner flanges of the steel strip foil, the abrasive foil being connected in such fashion with the support that the inner flanges are, on the one hand, cooling elements, and, on the other, serve as covers between abrasive foil and adhesive backing and reliably prevent the penetration of splinters and abrasive grit, that the force-locking magnetic adhesion of the adhesive backing secures the abrasive foil at its place by its magnetic forces acting at right angles on the support surface so that these magnetic adhesive forces together with the holding elements locked into the holes result in a force-locking and non-positive interlocking of abrasive foil and support.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/DE1987/000553 WO1989004742A1 (en) | 1987-11-27 | 1987-11-27 | Abrasive foil and abrasion process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0387246A1 EP0387246A1 (en) | 1990-09-19 |
| EP0387246B1 true EP0387246B1 (en) | 1992-07-01 |
Family
ID=6803598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP87907926A Expired - Lifetime EP0387246B1 (en) | 1987-11-27 | 1987-11-27 | Abrasive foil and abrasion process |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US5081798A (en) |
| EP (1) | EP0387246B1 (en) |
| DE (1) | DE3780176D1 (en) |
| WO (1) | WO1989004742A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5660276A (en) * | 1993-12-03 | 1997-08-26 | Winnard; Stanley D. | Magnetic tool organizers, and tool box with magnetic organizers |
| DE4402550A1 (en) * | 1994-01-28 | 1995-08-03 | Raymond A Gmbh & Co Kg | Adhesive fastening element for holding components or functional parts on carrier parts |
| US6096107A (en) * | 2000-01-03 | 2000-08-01 | Norton Company | Superabrasive products |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2292991A (en) * | 1941-03-06 | 1942-08-11 | Behr Manning Corp | Flexible abrasive product |
| US2499933A (en) * | 1949-08-04 | 1950-03-07 | Joseph F Smul | Surface cleaning attachment |
| CH316478A (en) * | 1953-07-03 | 1956-10-15 | Baumgartner Max | Band saw device |
| US4330027A (en) * | 1977-12-22 | 1982-05-18 | Allied Corporation | Method of making strips of metallic glasses containing embedded particulate matter |
| CH630549A5 (en) * | 1978-05-29 | 1982-06-30 | Shikhirev Boris N | Apparatus for grinding sheet-metal materials by means of magnetic particles |
| US4222204A (en) * | 1979-06-18 | 1980-09-16 | Benner Robert L | Holder for an abrasive plate |
| US4377081A (en) * | 1980-10-09 | 1983-03-22 | Konrad Joseph D | Belt surfacing tool |
| JPH01281817A (en) * | 1988-04-28 | 1989-11-13 | Yamaha Motor Co Ltd | Disk file, fitting plate and grinder |
-
1987
- 1987-11-27 DE DE8787907926T patent/DE3780176D1/en not_active Expired - Lifetime
- 1987-11-27 US US07/477,967 patent/US5081798A/en not_active Expired - Fee Related
- 1987-11-27 EP EP87907926A patent/EP0387246B1/en not_active Expired - Lifetime
- 1987-11-27 WO PCT/DE1987/000553 patent/WO1989004742A1/en active IP Right Grant
Also Published As
| Publication number | Publication date |
|---|---|
| WO1989004742A1 (en) | 1989-06-01 |
| US5081798A (en) | 1992-01-21 |
| EP0387246A1 (en) | 1990-09-19 |
| DE3780176D1 (en) | 1992-08-06 |
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