US20090277098A1 - Abrasive and Method of Fabricating Same - Google Patents

Abrasive and Method of Fabricating Same Download PDF

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Publication number
US20090277098A1
US20090277098A1 US11/720,642 US72064205A US2009277098A1 US 20090277098 A1 US20090277098 A1 US 20090277098A1 US 72064205 A US72064205 A US 72064205A US 2009277098 A1 US2009277098 A1 US 2009277098A1
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US
United States
Prior art keywords
abrasive
set forth
matrix
binder
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.)
Abandoned
Application number
US11/720,642
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English (en)
Inventor
Klaus-Peter Spies
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.)
Klingspor AG
Original Assignee
Klingspor AG
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 Klingspor AG filed Critical Klingspor AG
Assigned to KLINGSPOR AG reassignment KLINGSPOR AG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SPIES, KLAUS-PETER
Publication of US20090277098A1 publication Critical patent/US20090277098A1/en
Abandoned legal-status Critical Current

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    • 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
    • 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
    • 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
    • B24D3/001—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 supporting member

Definitions

  • the invention generally relates to an abrasive wherein abrasive grains are embedded in a matrix of a binder and wherein a contact surface covered by abrasive grains is configured for abrasion of a workpiece.
  • the invention relates furthermore specially to abrasives having a non-cellular, particularly non-foamed binder in said contrast to the cellular, particularly foamed binder.
  • non-cellular PUR types particularly substantial to the invention belong to the group:
  • the elastically compliant compacts cited initially as prior art and “solid” composites in the cited grouping respectively are special cast elastomers, the abrasives in accordance with the invention also using particularly cast elastomers.
  • Abrasives having a non-cellular binder, to which the invention relates are characterized by being targeted foamed neither physically nor chemically by the corresponding concrete handling of the process.
  • the target instead is to avoid expansion within the scope of being maximum possible, although in practice remnant cellular formations can never be totally avoided. This is why—at least in describing the abrasive product as fabricated concretely designed for the market—it appears best to make reference to the real and theoretical densities as compared to actual practice.
  • the PUR is employed, particularly with a density of no less than 800 kg/m 3 which adequately describes the minimum porosity.
  • the invention relates in conclusion particularly to the abrasives, the composite of which comprises a thermosetting binder of the abrasive grains.
  • thermosetting plastics such as for example of polyurethane, known as such as binders for abrasive grains of composites, although rubber may also be used in the scope of the invention as the binder for the abrasive grains.
  • thermoplastic binder for the abrasive grains in the form of a plasticized colloxyline reads from the German patent DD 106 585 A which different to the thermosetting plastics employed in the scope of the invention additionally requires the use of a plasticizer in roughly equal proportion 1:1 or 0.8:1.). Also required to prevent loading of the abrasive is a proportion of at least 60% by weight of the abrasive powder in the abrasive composite, a corresponding proportion of abrasive powder exceeding 80% being incidentally viewed as being detrimental for bonding the abrasive composite.
  • This known abrasive composite is specially devised for configuring the abrasive composite as an extremely thin layer of abrasive in the range of 10 ⁇ m to maximum 40 ⁇ m thick as measured perpendicular to the backing.
  • abrasive grains the grain size of which is selected in accordance with the desired result
  • a backing absorbs the traction and centrifugal forces resulting in the machine.
  • the abrasive grains are attached to the backing in just a single layer and jut from the surface in abrasive contact with the workpiece by abrasive protuberances. As soon as these protuberances have become worn down in abrasion, resulted in the binder coming into friction contact with the workpiece, the effectiveness in abrasion is significantly diminished and the nuisance of the binder loading the abraded surface of the workpiece occurs.
  • the matrix is divided into a plurality of matrix bodies dispersed mutually interspaced featuring in the direction the free contact surface with the workpiece with the workpiece to the backing an increasing cross-section parallel to the backing (German patent T2 692 10 221).
  • the invention is based on the object of providing an abrasive of the kind as it reads from the preamble of claim 1 which is suitable as an article for rational mass production for use as a finishing tool on modern abrasive machines in combining a long useful life with high consistency in finishing quality.
  • a contact surface covered with abrasive grains which as may be necessary needs to be exposed in the last phase of the production process by releasing a covering skin of the matrix binders resulted in portions of the abrasive grains protruding from the original first contact surface with the workpiece.
  • Loading of the abraded surface of the workpiece is avoided or at least minimized in that during wear down of the abrasive grain covering of the matrix the previously surrounding resident binder does not come into loading contact with the abraded surface of the workpiece, it instead abrading like a rubber eraser.
  • the abrasive grains are not worn down as such, but drop off bit by bit from the current contact surface. This loss of abrasive grains is regenerated continuously from the depth of the matrix so that during finishing, despite consumption of the matrix the finishing quality remains consistent. Indeed, this applies even up to total consumption of the matrix in its connection to the backing.
  • the backing ensures a consistent working quality no matter to what degree the matrix is consumed even with high working parameters such as rotative speed, belt speed or ratings of an oscillation, whilst achieving rational and cost-effective fabrication of the abrasive in accordance with the invention in just a few working steps.
  • the finish achievable with the abrasive in accordance with the invention in conjunction with modern finishing machines is associated with a further additional minimally erosive effect of the abrasive grains as compared to the abrasive non-wovens whereby in accordance with the invention imperfection in the abrasive surface can now be not only concealed but abraded away or at least corrected.
  • This now surprisingly makes it possible to subsequently chrome workpieces suitable therefor without further finishing being needed.
  • the abrasion is substantially determined by the selection of the binder, any fillers as may be employed and the type of grain of the abrasive grains.
  • the various materials such as e.g. brass, aluminum or stainless steel the birder can be tailored thereto.
  • the abrasive in accordance with the invention is particularly effective in finishing relatively rough workpiece surfaces. These can now be finished to extremely fine surfaces with no imperfections even when the abrasive grains are relatively coarse in the abrasive in accordance with the invention.
  • Claims 2 to 43 relate to advantageous further embodiments of the abrasive in accordance with the invention and claims 44 to 49 relate to a preferred device for fabricating the abrasive in accordance with the invention.
  • an abrasive composite whose elastically compliant matrix comprises a noncellular thermosetting binder is now applied to a flexibly configured backing in forming an integral composite directly, i.e. without the promotion of a separate bonding layer, whereby in consumption of the abrasive the grains continually worn out are replaced from the depth of the matrix, this applying continued until total or near total wear out of the abrasive composites down to the flexible backing without loss of abrasion quality.
  • the elastically compliant configuration in the abrasive composites comprising matrix and abrasive grains can endow the complete abrasive in conjunction with the flexibility of the backing a native flexibility which can be tailored to the particular application.
  • Claims 2 and 3 relate to preferred upper and lower limits for the density of the binder in the matrix and abrasive composite respectively.
  • Claims 4 to 8 relate to preferred selection criteria as regards the elastically compliable configuration of the matrix with reference to elasticity (claims 4 and 5 ), hardness (claims 6 and 7 ) and ultimate elongation (claim 8 ).
  • Claim 9 recites preferred criteria under which the backing of the matrix or of the abrasive composite is claimed to be flexible.
  • Claims 10 and 11 relate to preferred dimensions for the thickness of the matrix perpendicular to the backing as claimed minimally (claim 10 ) and maximally (claim 11 ).
  • the thicknesses as preferred for application are 1000 ⁇ m, i.e. 1.0 mm and 1500 ⁇ m, i.e. 1.5 mm.
  • One application of the invention particularly highlighted is in this sense the fabrication of the abrasive as flat material, especially as web material.
  • Claims 12 and 13 relate to preferred dimensions for the ratio of the percentage by volume of the abrasive grains and of the binder of the matrix in claiming a lower limit (claim 12 ) and an upper limit (claim 13 ).
  • Claim 14 recites preferred grain size ranges of the abrasive grains.
  • Claim 15 recites preferred ranges for the Shore hardness of the abrasive.
  • Claims 16 to 20 relate to preferred materials for the non-cellular thermosetting binder which as claimed in claim 21 may be filled as usual in the branch whilst claims 22 and 23 recite special formulations.
  • Claim 24 relates to a special formulation for the case of the binder being foamable which in the scope of the invention is to be avoided as best possible.
  • claim 24 recites use especially of a foam inhibitor as an additive to the binder.
  • Claims 25 and 27 relate to preferred selections as to the type of abrasive grains.
  • Claims 28 to 30 relate to preferred arrays of the abrasive grains in the matrix.
  • Claims 31 to 34 relate to preferred sub-divisionings of the matrix into individual matrix bodies.
  • Claims 35 to 38 relate to preferred configurations of the backing.
  • Claims 39 to 42 relate to preferred geometric configurations of the abrasive for various abrasive tools.
  • Claim 43 in conclusion relates to a preferred configuration of the original contact surface of the abrasive in its configuration as marketed prior to its use on the abrasive tool.
  • the abrasive in accordance with the invention is configured as an endless belt
  • its effect on the workpiece for the same abrasive can also be varied according to the location of the endless belt resulting in the effect on the workpiece.
  • the locations particularly preferably for the effect are, on the one hand, on a contact wheel and, on the other, on a free side of the endless belt whereby also the hardness of the contact wheel and the belt speed may serve as influencing factors.
  • the invention relates also to methods of fabricating the abrasive in accordance with the invention as claimed in claims 44 to 49 .
  • FIGS. 1 to 3 illustrating the gist of the invention in general.
  • FIG. 1 shows the contact surface of the abrasive in a partial view whilst
  • FIG. 2 is a partial view on a magnified scale of that as shown in FIG. 1 corresponding to the white circle therein and
  • FIG. 3 is an illustration of a cross-section portion of the same abrasive perpendicular to the contact surface on a further magnified scale.
  • a flexible supporting backing 2 is bonded to a matrix 4 (shown dotted in FIG. 3 ) comprising an elastically compliant and non-cellular thermosetting binder 6 e.g. of unfoamed polyurethane together with fillers and additives, whereby abrasive grains 8 are embedded in the matrix 4 homogenously dispersed or in layers parallel to the backing 2 .
  • the binder 6 serves not only to bind the abrasive grains 8 in the matrix 4 but also the matrix 4 to the backing 2 in thus doing away with the need of a separate bonding layer between matrix 4 and backing 2 .
  • a free contact surface 10 Configured on the side of the matrix 4 facing away from the backing 2 is a free contact surface 10 parallel to the backing 2 .
  • free scabs of the abrasive grains 8 slightly protrude from the contact surface 10 (not shown) subject to the return force of the elastically compliant binder 6 .
  • the abrasive grains in the region of the contact surface 10 interact with a workpiece (not shown) against the return force of the elastically compliant binder 6 in becoming fully, or near fully impressed into the matrix 4 .
  • the abrasive grains 8 jut from the contact surface only sufficiently to form a microstructure together with the binder 6 of the matrix 4 at the contact surface 10 .
  • the matrix 4 is divided into a plurality of the regular hexagonal matrix bodies 4 a whose defining surfaces at the hexagonal profile are oriented perpendicular to the backing 2 so that no matter how worn the matrix 4 becomes the same regular hexagonal cross-section of each matrix body 4 a to each backing 2 or parallel to the contact surface 10 remains.
  • Each single matrix body 4 a juts from the backing 2 with a full-length interspace 12 dimensioned consistently inbetween and extending from the backing 2 to the region of the contact surface 10 .
  • the interspaces 12 can be used for air or liquid cooling of the workpiece (not shown).
  • the matrix bodies 4 a form a homogenously honeycomb structure of the matrix 4 .
  • the abrasion direction 16 is selected so that it is oriented along the imaginary line connecting the two opposing corners of a matrix body 4 a, these in turn being arranged mutually staggered in forming a gap so that even when a matrix body 4 a is destabilized mutual support by a neighboring non-destabilized matrix body 4 a is assured.
  • the stainless steel tubestock is firstly rough ground on a centerless abrasive machine with an abrasive belt grain size P 80.
  • the abrasive belts employed are e.g. standard abrasive belts CS 310 XF (flexible cotton backing approx. 320 g/m 2 , abrasive grain aluminum oxide, phenolic resin binder). To achieve the specified finish at least three runs with the machine (grain P120-P180-P280) were needed.
  • an endless belt in accordance with the invention was used in the same test configuration and with same test preparation, the characteristics of the belt being as follows: flexible cotton backing approx. 320 g/m 2 , polyurethane as non-cellular thermosetting binder with a layer thickness of 1200 ⁇ m, abrasive grain silicon carbide P60 homogenously dispersed in the binder.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
US11/720,642 2004-12-06 2005-11-25 Abrasive and Method of Fabricating Same Abandoned US20090277098A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102004058710.8 2004-12-06
DE102004058710 2004-12-06
PCT/EP2005/012637 WO2006061112A1 (de) 2004-12-06 2005-11-25 Schleifmittel und verfahren zu dessen herstellung

Publications (1)

Publication Number Publication Date
US20090277098A1 true US20090277098A1 (en) 2009-11-12

Family

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Application Number Title Priority Date Filing Date
US11/720,642 Abandoned US20090277098A1 (en) 2004-12-06 2005-11-25 Abrasive and Method of Fabricating Same

Country Status (7)

Country Link
US (1) US20090277098A1 (ja)
EP (1) EP1827762B1 (ja)
JP (1) JP4996475B2 (ja)
KR (1) KR101287501B1 (ja)
CN (1) CN101048259B (ja)
BR (1) BRPI0518815A2 (ja)
WO (1) WO2006061112A1 (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130110032A1 (en) * 2011-11-01 2013-05-02 Josef LUZON System and method for treating a surface
US10549403B2 (en) * 2012-09-05 2020-02-04 Kwh Mirka Ab Flexible grinding product with flattened surface and method for manufacturing the same

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105209179A (zh) * 2013-05-17 2015-12-30 3M创新有限公司 易于清洁的表面及其制备方法
DE102013112296A1 (de) * 2013-11-08 2015-05-13 Klingspor Ag Schleifmittel
EP3348355A1 (de) * 2017-01-16 2018-07-18 Klingspor AG Schleifkörper, insbesondere marmorierkörper
TWI656000B (zh) * 2018-03-27 2019-04-11 中國砂輪企業股份有限公司 Grinding tool
CN109227417A (zh) * 2018-10-31 2019-01-18 张家港智慧清洁技术研究院有限公司 一种电镀金刚石砂带及其制备方法
CN110421492B (zh) * 2019-06-12 2021-05-18 江苏君睿智能制造有限公司 一种用于冷轧型钢清洗的耐磨擦洗片

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US2825638A (en) * 1955-07-27 1958-03-04 Us Rubber Co Grinding wheel manufacture
US4255164A (en) * 1979-04-30 1981-03-10 Minnesota Mining And Manufacturing Company Fining sheet and method of making and using the same
US4317660A (en) * 1979-05-04 1982-03-02 Sia Schweizer Schmirgel-Und Schleif-Industrie Ag Manufacturing of flexible abrasives
US4504283A (en) * 1982-07-22 1985-03-12 Superior Finishers, Incorporated Cushioned abrasive articles, and method of manufacture
US5399606A (en) * 1992-10-28 1995-03-21 Rutgerswerke Aktiengesellschaft Ag Thermosetting plastic powder mixtures
US5976204A (en) * 1994-11-02 1999-11-02 Norton Company Abrasive articles and method for preparing them
US20020116876A1 (en) * 2000-11-24 2002-08-29 Kazuo Suzuki Abrasive product and method of making the same
US6811582B1 (en) * 1999-10-25 2004-11-02 Treibacher Schleifmitte Ag Abrasive grain with an abrasive coating
US6951577B2 (en) * 2002-11-06 2005-10-04 3M Innovative Properties Company Abrasive articles and method of making and using the articles
US7695353B2 (en) * 2004-11-19 2010-04-13 Toyoda Van Moppes Ltd. Grinding wheel

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Publication number Priority date Publication date Assignee Title
US2825638A (en) * 1955-07-27 1958-03-04 Us Rubber Co Grinding wheel manufacture
US4255164A (en) * 1979-04-30 1981-03-10 Minnesota Mining And Manufacturing Company Fining sheet and method of making and using the same
US4317660A (en) * 1979-05-04 1982-03-02 Sia Schweizer Schmirgel-Und Schleif-Industrie Ag Manufacturing of flexible abrasives
US4504283A (en) * 1982-07-22 1985-03-12 Superior Finishers, Incorporated Cushioned abrasive articles, and method of manufacture
US5399606A (en) * 1992-10-28 1995-03-21 Rutgerswerke Aktiengesellschaft Ag Thermosetting plastic powder mixtures
US5976204A (en) * 1994-11-02 1999-11-02 Norton Company Abrasive articles and method for preparing them
US6811582B1 (en) * 1999-10-25 2004-11-02 Treibacher Schleifmitte Ag Abrasive grain with an abrasive coating
US20020116876A1 (en) * 2000-11-24 2002-08-29 Kazuo Suzuki Abrasive product and method of making the same
US6951577B2 (en) * 2002-11-06 2005-10-04 3M Innovative Properties Company Abrasive articles and method of making and using the articles
US7695353B2 (en) * 2004-11-19 2010-04-13 Toyoda Van Moppes Ltd. Grinding wheel

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130110032A1 (en) * 2011-11-01 2013-05-02 Josef LUZON System and method for treating a surface
US9492001B2 (en) * 2011-11-01 2016-11-15 Derma Dream Group Ltd. System and method for treating a surface
WO2013190554A1 (en) * 2012-06-20 2013-12-27 Josef Luzon System and method for treating a surface
US10549403B2 (en) * 2012-09-05 2020-02-04 Kwh Mirka Ab Flexible grinding product with flattened surface and method for manufacturing the same

Also Published As

Publication number Publication date
CN101048259B (zh) 2013-03-13
WO2006061112A1 (de) 2006-06-15
EP1827762A1 (de) 2007-09-05
JP4996475B2 (ja) 2012-08-08
KR20070085816A (ko) 2007-08-27
BRPI0518815A2 (pt) 2008-12-09
JP2008522837A (ja) 2008-07-03
EP1827762B1 (de) 2013-09-11
CN101048259A (zh) 2007-10-03
KR101287501B1 (ko) 2013-07-19

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AS Assignment

Owner name: KLINGSPOR AG, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SPIES, KLAUS-PETER;REEL/FRAME:019369/0823

Effective date: 20070425

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION