US20210316419A1 - Grinding device - Google Patents

Grinding device Download PDF

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Publication number
US20210316419A1
US20210316419A1 US17/273,529 US201917273529A US2021316419A1 US 20210316419 A1 US20210316419 A1 US 20210316419A1 US 201917273529 A US201917273529 A US 201917273529A US 2021316419 A1 US2021316419 A1 US 2021316419A1
Authority
US
United States
Prior art keywords
grinding
support element
carrier
grinding device
grinding means
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.)
Pending
Application number
US17/273,529
Other languages
English (en)
Inventor
Christian Wall
Werner Unnerstall
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.)
Rud Starcke GmbH and Co KG
Original Assignee
Rud Starcke GmbH and Co KG
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 Rud Starcke GmbH and Co KG filed Critical Rud Starcke GmbH and Co KG
Assigned to RUD. STARCKE GMBH & CO. KG reassignment RUD. STARCKE GMBH & CO. KG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: Unnerstall, Werner, WALL, CHRISTIAN
Publication of US20210316419A1 publication Critical patent/US20210316419A1/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
    • B24B21/004—Machines or devices using grinding or polishing belts; Accessories therefor using abrasive rolled strips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D15/00—Hand tools or other devices for non-rotary grinding, polishing, or stropping
    • B24D15/02—Hand tools or other devices for non-rotary grinding, polishing, or stropping rigid; with rigidly-supported operative surface
    • B24D15/023—Hand tools or other devices for non-rotary grinding, polishing, or stropping rigid; with rigidly-supported operative surface using in exchangeable arrangement a layer of flexible material
    • B24D15/026—Hand tools or other devices for non-rotary grinding, polishing, or stropping rigid; with rigidly-supported operative surface using in exchangeable arrangement a layer of flexible material able to be stripped-off from a built-in delivery spool

Definitions

  • Exemplary embodiments of the invention relate to a grinding device and to a grinding means.
  • Such grinding devices consist of a shape-stable support element, which may be in the form of a support disc or in the form of a grinding block, the latter in the case of manual use.
  • the grinding means is in the form of a flexible grinding sheet or a grinding belt, which is held on the support element by means of a hook-and-loop connection, for which purpose the support element/grinding means pairing has suitably designed hook-and-loop layers.
  • the grinding means this is provided on the side of a carrier that is located opposite a grinding layer, which consists of an abrasive grit, it being possible for the carrier to be made of paper, film, fabric, or a combination thereof.
  • the material bond takes place by adhesion, wherein the contact surface of the carrier that makes contact with the support disc is equipped with a self-adhesive layer.
  • the construction of the carrier for providing the hook-and-loop or self-adhesive layer is cost-intensive, in particular since such a layer has to be formed in multiple stages.
  • they are subject to a relatively high degree of wear due to the connection being made and released.
  • the holding of the grinding means on the support element by means of vacuum requires special measures with regard to the air permeability and sealing. This means that the support disc must have apertures, through which air is sucked in order to hold the grinding means thereon.
  • U.S. Pat. No. 3,345,785 A discloses a grinding device with the suggestion of a frictional connection between a flexible support element and a grinding means, wherein the friction fit is established between a peripheral flange of the grinding means and the support element.
  • the problem addressed by the invention is that of further developing a grinding device and a grinding means of the generic type in such a way that it can be produced more easily and cost-effectively, and it is easier to handle.
  • the coefficient of friction between the support element and the grinding means, which is held thereon across the entire surface is sufficient to absorb the longitudinal and transverse forces that occur during grinding, wherein according to the invention the coefficient of friction of the pairing is between 0.2 and 0.5.
  • Such a coefficient of friction is sufficient, in particular, when grinding a finished surface at certain points, wherein the friction force between the support disc and the grinding means is generated by pressure when the grinding device, i.e., the support element and the grinding means, is pressed onto the surface to be treated.
  • This friction force is preferably between 0.5 and 2.0 N/mm 2 .
  • the grinding means which may be in the form of a single sheet or a grinding belt, consists of a carrier and a grinding layer held thereon. While the carrier, which forms a contact layer to the support element, is constructed in multiple stages in the prior art and is designed in particular for a hook-and-loop or adhesive connection, the carrier according to the invention is produced as a single layer made of a suitable plastic, which should be both elastic and flexible.
  • Polymers, elastomers or leathers are particularly suitable for this, the thickness of the carrier being between 0.7 and 4 mm.
  • the grinding of both flat and curved surfaces is possible, the curved surfaces being convex or concave.
  • the frictional connection between the support element and the grinding means is particularly advantageous when the grinding means is in web form. Since the grinding belt is precisely aligned and guided in the area of connection to the support element, problem-free positioning between the support element and the grinding sheet is ensured.
  • the grinding belt is lifted off for moving the support element to the next position, or the grinding belt slides away from the support disc when the lifting or tearing force with which the grinding belt is detached from the support element is greater than the friction force between the support element and the grinding belt.
  • the grinding itself takes place, as mentioned, at certain points or across a surface, using orbital, rotating or vibrating movements.
  • the carrier carrying the grinding means may be made of paper, while the contact surface which bears against the support element is made of an elastomeric, rubber-like or leather material.
  • the surface of the carrier is smooth, for example in the form of a film
  • the surface assigned to the support element is slightly structured and is likewise formed of an elastomeric, rubber-like, or leather material.
  • the rough surface of the carrier formed of a fabric is slightly structured on the side held by frictional engagement on the support element and is possibly formed of a foam.
  • additional anti-slip means are not absolutely necessary.
  • the single FIGURE shows a grinding device according to the invention in a schematic side view.
  • the FIGURE shows a grinding device 1 for removing a flaw in a surface, in particular a finished surface, of an object (not shown) by grinding.
  • This grinding device 1 has a robot arm 2 and a support element 3 held thereon in the form of a support disc, which support element is movable, for example in an orbital, vibrating or rotating manner, relative to the surface in order to grind the flaw.
  • a grinding means 5 in the example in the form of a grinding belt, bears with frictional engagement against the support element 3 , wherein the rear side of the grinding means 5 , so to speak, which bears against the support element 3 , is designed as a carrier, which on the other side carries an abrasive grit that makes contact with the surface of the object.
  • the grinding means 5 is held in a dispenser in the form of a cassette 4 and is wound as a roll 6 on an unwinding shaft 7 , and is wound onto a winding shaft 8 , preferably in cycles, in a manner corresponding to the grinding process.
  • the frictional engagement between the support element 3 and the grinding means 5 is released by lifting the support element 3 , so that the grinding means 5 can be advanced without hindrance.

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)
US17/273,529 2018-09-05 2019-08-30 Grinding device Pending US20210316419A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102018121625.4 2018-09-05
DE102018121625.4A DE102018121625A1 (de) 2018-09-05 2018-09-05 Schleifeinrichtung
PCT/EP2019/073205 WO2020048886A1 (de) 2018-09-05 2019-08-30 Schleifeinrichtung

Publications (1)

Publication Number Publication Date
US20210316419A1 true US20210316419A1 (en) 2021-10-14

Family

ID=67810609

Family Applications (1)

Application Number Title Priority Date Filing Date
US17/273,529 Pending US20210316419A1 (en) 2018-09-05 2019-08-30 Grinding device

Country Status (12)

Country Link
US (1) US20210316419A1 (es)
EP (1) EP3846966B1 (es)
JP (1) JP2021534993A (es)
KR (1) KR20210042990A (es)
CN (1) CN112752631B (es)
BR (1) BR112021000891A2 (es)
CA (1) CA3107230A1 (es)
DE (1) DE102018121625A1 (es)
ES (1) ES2968470T3 (es)
MX (1) MX2021002576A (es)
WO (1) WO2020048886A1 (es)
ZA (1) ZA202100300B (es)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017108191A1 (de) * 2017-04-18 2018-10-18 Rud. Starcke Gmbh & Co. Kg Verfahren zum partiellen Schleifen einer Oberfläche sowie Schleifeinrichtung

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2309819A (en) * 1941-04-18 1943-02-02 Carborundum Co Art of grinding and polishing glass and apparatus therefor
US3498010A (en) * 1965-06-03 1970-03-03 Nobuyoshi Hagihara Flexible grinding disc
US4010583A (en) * 1974-05-28 1977-03-08 Engelhard Minerals & Chemicals Corporation Fixed-super-abrasive tool and method of manufacture thereof
US5389032A (en) * 1993-04-07 1995-02-14 Minnesota Mining And Manufacturing Company Abrasive article
US5964652A (en) * 1996-08-14 1999-10-12 Siemens Aktiengesellschaft Apparatus for the chemical-mechanical polishing of wafers
US5967882A (en) * 1997-03-06 1999-10-19 Keltech Engineering Lapping apparatus and process with two opposed lapping platens
US6634929B1 (en) * 1999-04-23 2003-10-21 3M Innovative Properties Company Method for grinding glass
US6685539B1 (en) * 1999-08-24 2004-02-03 Ricoh Company, Ltd. Processing tool, method of producing tool, processing method and processing apparatus
US20090035519A1 (en) * 2007-08-03 2009-02-05 Saint-Gobain Abrasives, Inc. Abrasive article with anti-slip polymeric layer
US7520800B2 (en) * 2003-04-16 2009-04-21 Duescher Wayne O Raised island abrasive, lapping apparatus and method of use
US9321149B2 (en) * 2011-11-09 2016-04-26 3M Innovative Properties Company Composite abrasive wheel
US20160136778A1 (en) * 2014-11-17 2016-05-19 San Fang Chemical Industry Co., Ltd. Polishing pad and method for making the same

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2258733A (en) * 1940-08-30 1941-10-14 Gen Motors Corp Sanding machine
US3345785A (en) * 1964-12-07 1967-10-10 Warren N Riker Sanding disc assembly
DE1973875U (de) * 1965-12-31 1967-11-30 Franz Josefy Bandschleifmaschine.
DE3642086A1 (de) * 1986-12-10 1988-06-23 Fraunhofer Ges Forschung Schleifvorrichtung
US5109638A (en) * 1989-03-13 1992-05-05 Microsurface Finishing Products, Inc. Abrasive sheet material with non-slip backing
FR2758285B3 (fr) * 1997-01-13 1998-12-04 Struers As Procede de fixation d'un agent abrasif ou de polissage, sous forme de feuille, sur un support magnetique
HU219837B (hu) * 1997-10-29 2001-08-28 József Mandzsú Gyorskapcsolóelemmel rendelkező, megmunkáló felülettel ellátott csiszolólap és gyorskapcsoló elemrészekből álló gyorskapcsolórendszer
US20010031612A1 (en) * 2000-01-06 2001-10-18 Scott Diane B. Retention of a polishing pad on a platen
DE102010001769A1 (de) * 2010-02-10 2011-08-11 JÖST GmbH, 69483 Schleif- und Reinigungskörper
DE102017108191A1 (de) * 2017-04-18 2018-10-18 Rud. Starcke Gmbh & Co. Kg Verfahren zum partiellen Schleifen einer Oberfläche sowie Schleifeinrichtung

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2309819A (en) * 1941-04-18 1943-02-02 Carborundum Co Art of grinding and polishing glass and apparatus therefor
US3498010A (en) * 1965-06-03 1970-03-03 Nobuyoshi Hagihara Flexible grinding disc
US4010583A (en) * 1974-05-28 1977-03-08 Engelhard Minerals & Chemicals Corporation Fixed-super-abrasive tool and method of manufacture thereof
US5389032A (en) * 1993-04-07 1995-02-14 Minnesota Mining And Manufacturing Company Abrasive article
US5964652A (en) * 1996-08-14 1999-10-12 Siemens Aktiengesellschaft Apparatus for the chemical-mechanical polishing of wafers
US5967882A (en) * 1997-03-06 1999-10-19 Keltech Engineering Lapping apparatus and process with two opposed lapping platens
US6634929B1 (en) * 1999-04-23 2003-10-21 3M Innovative Properties Company Method for grinding glass
US6685539B1 (en) * 1999-08-24 2004-02-03 Ricoh Company, Ltd. Processing tool, method of producing tool, processing method and processing apparatus
US7520800B2 (en) * 2003-04-16 2009-04-21 Duescher Wayne O Raised island abrasive, lapping apparatus and method of use
US20090035519A1 (en) * 2007-08-03 2009-02-05 Saint-Gobain Abrasives, Inc. Abrasive article with anti-slip polymeric layer
US9321149B2 (en) * 2011-11-09 2016-04-26 3M Innovative Properties Company Composite abrasive wheel
US20160136778A1 (en) * 2014-11-17 2016-05-19 San Fang Chemical Industry Co., Ltd. Polishing pad and method for making the same
US10906154B2 (en) * 2014-11-17 2021-02-02 San Fang Chemical Industry Co., Ltd. Polishing pad and method for making the same

Also Published As

Publication number Publication date
EP3846966A1 (de) 2021-07-14
CN112752631A (zh) 2021-05-04
ZA202100300B (en) 2022-05-25
ES2968470T3 (es) 2024-05-09
CA3107230A1 (en) 2020-03-12
CN112752631B (zh) 2023-02-17
DE102018121625A1 (de) 2020-03-05
KR20210042990A (ko) 2021-04-20
BR112021000891A2 (pt) 2021-04-13
MX2021002576A (es) 2021-05-12
EP3846966B1 (de) 2023-10-18
WO2020048886A1 (de) 2020-03-12
JP2021534993A (ja) 2021-12-16

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Owner name: RUD. STARCKE GMBH & CO. KG, GERMANY

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Effective date: 20210301

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