EP1262282A1 - Preiswertes Schleifwerkzeug und Verfahren zur Herstellung - Google Patents

Preiswertes Schleifwerkzeug und Verfahren zur Herstellung Download PDF

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Publication number
EP1262282A1
EP1262282A1 EP02291272A EP02291272A EP1262282A1 EP 1262282 A1 EP1262282 A1 EP 1262282A1 EP 02291272 A EP02291272 A EP 02291272A EP 02291272 A EP02291272 A EP 02291272A EP 1262282 A1 EP1262282 A1 EP 1262282A1
Authority
EP
European Patent Office
Prior art keywords
abrasive grains
grains
abrasive
abrasion device
abrasion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP02291272A
Other languages
English (en)
French (fr)
Inventor
Georges Henri Broido
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.)
Lam Plan SA
Original Assignee
Lam Plan SA
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 Lam Plan SA filed Critical Lam Plan SA
Publication of EP1262282A1 publication Critical patent/EP1262282A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
    • B24D18/009—Tools not otherwise provided for
    • 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
    • B24D11/001—Manufacture of flexible abrasive materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
    • B24D3/02—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent
    • B24D3/20—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially organic
    • B24D3/28—Resins or natural or synthetic macromolecular compounds

Definitions

  • the present invention relates, in general, the technical field of abrasion.
  • the invention relates, according to a first of its aspects, an abrasion device comprising a support, produced by hardening a variable viscosity material, and abrasive grains included in the holder.
  • Devices of this type which often adopt the shape of discs or cylinders to be able to be suitable for rotary tools, but which can take other shapes adaptable to power tools or manual and rotary or not, are well known to man art.
  • the invention has precisely for aim of proposing an abrasion device meeting this need, as well as an efficient manufacturing process for this device.
  • each abrasive grain includes an abrasive core coated with a metal or a metal alloy sensitive to a magnetic attraction, and in that the grains abrasives gather in areas of concentration in relatively strong abrasive grains, separated one from the other others by grain concentration zones relatively weak abrasives.
  • the support advantageously comprises a surface layer and a deep layer, the deep layer being free of abrasive grains.
  • the grain concentration zones relatively weak abrasives, or at least some of these areas are preferably free of grains abrasives.
  • the areas of relatively strong concentration form one or more arrangements of parallel lines or curves to others.
  • variable viscosity material can be a polymerizable resin, for example polyester or polyurethane.
  • the abrasive grains have a larger dimension substantially perpendicular to the surface layer.
  • the abrasive grains are flush with the surface of the support.
  • the invention also relates to a method of manufacturing an abrasion device, this process including the steps of: preparing a mold delimited at least by a bottom and an edge, the bottom forming a surface subjected to a magnetic field with variations in intensity and / or polarity along at least one dimension of this surface; sprinkle abrasive grains on the bottom of the mold each of which includes a metal coated abrasive core or a metal alloy sensitive to an attraction magnetic; pour into the pan, over the beans abrasives, a hardenable material taken in a state fluid or soft, resulting in grain inclusion abrasives in the material; wait for the hardening of the curable material, which results, between the grains abrasives and the material, a cohesion which combines them in the same abrasion device; and unmold the device abrasion.
  • the abrasive grains are sprinkled on the bottom of the mold in insufficient quantity to form a single layer of abrasive grains over the entire bottom.
  • This process can also include a step consisting in shaking the mold before pouring the material curable, this step can in particular be implemented works while the abrasive grains are sprinkled on the bottom of the mold and / or after this operation of dusting.
  • This manufacturing process can finally include the use, as a mold base, of a plate or rubber sheet in which are embedded magnets or magnetic particles.
  • this method uses a mold 3, delimited by a bottom 30 and by an edge 31.
  • the bottom 30 of the mold 3 forms a surface 300, which is subjected to a magnetic field with a spatial modulation, i.e. variations of intensity and / or polarity along an L dimension at least of this surface 300.
  • the bottom 30 of the mold is for example consisting of a plate or sheet of rubber 301, in which are embedded magnets or particles magnetized 302, such plates or sheets being especially commercially available.
  • the background may also include a magnetic plate.
  • Abrasive grains 2 are then sprinkled on the bottom 30 of the mold 3, preferably in quantity less than would be required to form a single layer of abrasive grains 2 over the entire surface 300 from the bottom 30.
  • the abrasive grains 2 are in fact adapted to the implementation of the invention, each of these grains comprising an abrasive core 20 coated with a metal or a metal alloy 21 sensitive to attraction magnetic.
  • Such abrasive grains are known in the art earlier, and for example marketed by the Company De Beers, the coating metal so far used for its heat diffusion properties and for maintaining the cohesion of the abrasive core 20.
  • the mold 3 can be shaken so as to ensure a regular distribution of grains 2 opposite the magnets or magnetic particles 302, provided that such a distribution is sought without being directly obtained by dusting.
  • a weight can then be placed on the layer of resin to promote the penetration of abrasive grains in subject 10, and especially to avoid possible deformations that could cause the removal of the resin during polymerization.
  • variable viscosity material 10 is preferably consisting of a polymerizable resin cold or hot, such as polyester or polyurethane, in which are advantageously incorporated various adjuvants, such as a catalyst polymerization, a polymerization accelerator, a dye, etc., in a manner known per se.
  • a polymerizable resin cold or hot such as polyester or polyurethane
  • various adjuvants such as a catalyst polymerization, a polymerization accelerator, a dye, etc.
  • the hardening of the hardenable material 10 has for effect of ensuring cohesion between the abrasive grains 2 and the material 10, the product thus formed constituting a abrasion device 4 which can be removed from the mold 3.
  • the previously described process provides a abrasion device in which abrasive grains 2 are included in a support 1, forming a binder and resulting of the hardening of the material 10, so that these abrasive grains 2 gather in zones Z1 of relatively high concentration of abrasive grains, separated from each other by zones Z0 of relatively low abrasive grain concentration.
  • the local concentration and the distribution of abrasive grains 2 directly depend local concentration and distribution of magnets or magnetic particles 302 in the bottom 30 of the mold 3.
  • zones Z0 of relatively low grain concentration abrasives that are actually completely grain-free abrasives By providing, in the bottom 30, free zones of magnets or magnetized particles 302, so it's possible to obtain, in the abrasion device 4, zones Z0 of relatively low grain concentration abrasives that are actually completely grain-free abrasives 2.
  • the zones Z1 of relatively high concentration in abrasive grains 2 form one or more arrangements of lines or curves parallel to each other, such that the arrangements A1 to A4 illustrated in FIG. 3, the arrangement A1 of FIG. 4, or again the arrangements A1 to A3 of figure 5.
  • zones Z1 and Z0 Thanks to the alternation of zones Z1 and Z0, in fact that Z0 zones by definition less hard than zones Z1, wear out faster than the latter, and by the way regulator that the wear of zones Z0 cannot however precede, in thickness, the wear of zones Z1 by only one quantity limited inter alia by the hardness of the part abraded, new leading edges offered by abrasive grains 2 present in zones Z1 are discovered as the device wears down abrasion of the invention, which guarantees efficiency optimal of the latter until its total wear.
  • the abrasive grains 2 are concentrated (FIG. 2) in a surface layer 11 of support 1, the deep layer 12 of this support being free of abrasive grains 2, except accident or imperfection of casting of the binding material 10.
  • the grains abrasives have a natural tendency under the effect of magnetic field, to orient themselves so that their most large dimension be substantially perpendicular to the outer surface of the surface layer, which further increases the cohesion between the support 1 and the abrasive grains 2, as well as the longevity of the device abrasion.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
EP02291272A 2001-05-30 2002-05-23 Preiswertes Schleifwerkzeug und Verfahren zur Herstellung Withdrawn EP1262282A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0107087A FR2825309B1 (fr) 2001-05-30 2001-05-30 Dispositif d'abrasion economique et procede de fabrication
FR0107087 2001-05-30

Publications (1)

Publication Number Publication Date
EP1262282A1 true EP1262282A1 (de) 2002-12-04

Family

ID=8863776

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02291272A Withdrawn EP1262282A1 (de) 2001-05-30 2002-05-23 Preiswertes Schleifwerkzeug und Verfahren zur Herstellung

Country Status (2)

Country Link
EP (1) EP1262282A1 (de)
FR (1) FR2825309B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109759966A (zh) * 2019-02-22 2019-05-17 华侨大学 一种柔性抛光粒子磁性排布抛光盘的制作方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7056877B2 (ja) * 2016-12-07 2022-04-19 スリーエム イノベイティブ プロパティズ カンパニー 可撓性研磨物品

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2281810A1 (fr) * 1974-08-15 1976-03-12 Edenvale Eng Works Produits abrasifs
FR2299122A1 (fr) * 1974-09-23 1976-08-27 Edenvale Eng Works Procede de fabrication d'outils abrasifs et outils obtenus
US5250084A (en) * 1992-07-28 1993-10-05 C Four Pty. Ltd. Abrasive tools and process of manufacture

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2281810A1 (fr) * 1974-08-15 1976-03-12 Edenvale Eng Works Produits abrasifs
FR2299122A1 (fr) * 1974-09-23 1976-08-27 Edenvale Eng Works Procede de fabrication d'outils abrasifs et outils obtenus
US5250084A (en) * 1992-07-28 1993-10-05 C Four Pty. Ltd. Abrasive tools and process of manufacture

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109759966A (zh) * 2019-02-22 2019-05-17 华侨大学 一种柔性抛光粒子磁性排布抛光盘的制作方法

Also Published As

Publication number Publication date
FR2825309B1 (fr) 2004-08-20
FR2825309A1 (fr) 2002-12-06

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