EP0387246B1 - Feuille abrasive et procede d'abrasion - Google Patents

Feuille abrasive et procede d'abrasion Download PDF

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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
Application number
EP87907926A
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German (de)
English (en)
Other versions
EP0387246A1 (fr
Inventor
Heinrich Clasen
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.)
CLASEN, HEINRICH
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
Publication of EP0387246A1 publication Critical patent/EP0387246A1/fr
Application granted granted Critical
Publication of EP0387246B1 publication Critical patent/EP0387246B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Feuille abrasive, caractérisée par l'emploi d'une feuille d'acier feuillard comme support souple d'abrasif, et procédé d'abrasion pour la réalisation de surfaces abrasives à refroidissement naturel permettant un remplacement rapide et une fixation fiable sur des logements rotatifs, oscillants, même des logements fixes. On utilise la feuille abrasive et le logement pour mettre en oeuvre le procédé, avec une face de fixation sur le logement, laquelle est formée par un support adhésif à aimant permanent et/ou par des parties de maintien orientées verticalement par rapport à la face de fixation et ménagées sur la feuille d'acier feuillard et par des évidements coincidents ménagés dans la face du logement.

Claims (2)

  1. Corps abrasif comportant une feuille abrasive, qui est constituée par un agent abrasif disposé sur un support flexible, et un dispositif récepteur, qui est pourvu, sur sa surface de travail, d'une surface d'appui adhésive permettant de maintenir de façon fixe la feuille abrasive,
    caractérisé en ce que :
    - le support d'agent abrasif est formé par une feuille d'acier en forme de bande possédant une épaisseur comprise entre 0,05 et 0,25 mm,
    - la surface d'appui adhésive présente une aimantation permanente,
    - la feuille d'acier en forme de bande porte des éléments de fixation, qui sont dirigés perpendiculairement à la surface de réception et se présentent sous la forme de parties rabattues vers l'intérieur de cette feuille,
    - la surface de réception présente des trous borgnes et/ou des trous traversants coïncidents, ces derniers constituant également des trous d'aspiration, destinés à recevoir les collerettes annulaires tubulaires des parties rabattues, et placés en coïncidence,
    les parties rabattues d'une part agissant en tant qu'éléments de refroidissement et, d'autre part servant d'élément de recouvrement entre la feuille abrasive et la surface d'appui adhésive et empêchant de façon sûre la pénétration de copeaux et de résidus d'abrasion,
    et l'adhérence produite par la force magnétique appliquée par la surface d'appui adhésive maintenant fermement la feuille abrasive en place, sous l'effet de la force magnétique agissant perpendiculairement à la surface de réception,
    de sorte que cette force d'adhérence magnétique établit, en liaison avec les éléments de fixation encliquetés dans les trous, un ensemble composé, maintenu par conjugaison de forces et de formes, de la feuille abrasive et du dispositif récepteur.
  2. Procédé pour fabriquer un corps abrasif selon la revendication 1, par dépôt d'une feuille abrasive pouvant être détachée rapidement, sur un dispositif récepteur comportant une surface d'appui adhésive pour le maintien ferme de la feuille abrasive,
    caractérisé en ce que :
    - on recouvre avec un agent abrasif une feuille d'acier en forme de bande possédant une épaisseur comprise entre 0,05 et 0,25 mm,
    - on pourvoit la feuille d'acier en forme de bande, d'éléments de fixation se présentant sous la forme de parties rabattues, en élargissant chaque fois un trou dans la feuille de manière à obtenir une partie tubulaire annulaire,
    - on équipe le dispositif récepteur d'une surface d'appui adhésive à aimantation permanente et on y ménage des ouvertures qui coïncident avec les parties rabattues de la feuille d'acier en forme de bande,
    - on raccorde la feuille abrasive à l'élément de support de telle sorte que les parties rabattues d'une part constituent des éléments de refroidissement et d'autre part servent d'éléments de recouvrement entre la feuille abrasive et la surface d'appui adhésive et empêchent de façon sûre la pénétration de copeaux et de résidus d'abrasion,
    - l'adhérence magnétique de la surface d'appui adhésive agissant selon une conjugaison de forces maintient fermement la feuille abrasive en place sous l'effet de la force magnétique perpendiculaire à la surface de réception,
    de sorte que cette force d'adhérence magnétique forme, conjointement avec les éléments de fixation encliquetés dans les trous, un ensemble composite constitué de la feuille abrasive et du dispositif récepteur, réuni par une conjugaison de forces et de formes.
EP87907926A 1987-11-27 1987-11-27 Feuille abrasive et procede d'abrasion Expired - Lifetime EP0387246B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/DE1987/000553 WO1989004742A1 (fr) 1987-11-27 1987-11-27 Feuille abrasive et procede d'abrasion

Publications (2)

Publication Number Publication Date
EP0387246A1 EP0387246A1 (fr) 1990-09-19
EP0387246B1 true EP0387246B1 (fr) 1992-07-01

Family

ID=6803598

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87907926A Expired - Lifetime EP0387246B1 (fr) 1987-11-27 1987-11-27 Feuille abrasive et procede d'abrasion

Country Status (4)

Country Link
US (1) US5081798A (fr)
EP (1) EP0387246B1 (fr)
DE (1) DE3780176D1 (fr)
WO (1) WO1989004742A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
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 (de) * 1994-01-28 1995-08-03 Raymond A Gmbh & Co Kg Verklebbares Befestigungselement zum Halten von Bau- oder Funktionsteilen auf Trägerteilen
US6096107A (en) * 2000-01-03 2000-08-01 Norton Company Superabrasive products

Family Cites Families (8)

* Cited by examiner, † Cited by third party
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 (de) * 1953-07-03 1956-10-15 Baumgartner Max Bandsägevorrichtung
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 (ja) * 1988-04-28 1989-11-13 Yamaha Motor Co Ltd 円盤ヤスリ，取付プレート及び研磨装置

Also Published As

Publication number Publication date
EP0387246A1 (fr) 1990-09-19
DE3780176D1 (de) 1992-08-06
US5081798A (en) 1992-01-21
WO1989004742A1 (fr) 1989-06-01

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