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EP0468177B1 - Abrasive wheel - Google Patents

Abrasive wheel Download PDF

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Publication number
EP0468177B1
EP0468177B1 EP19910109390 EP91109390A EP0468177B1 EP 0468177 B1 EP0468177 B1 EP 0468177B1 EP 19910109390 EP19910109390 EP 19910109390 EP 91109390 A EP91109390 A EP 91109390A EP 0468177 B1 EP0468177 B1 EP 0468177B1
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EP
European Patent Office
Prior art keywords
characterised
porous
abrasive
abrasive element
conglomerates
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
EP19910109390
Other languages
German (de)
French (fr)
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EP0468177A1 (en
Inventor
Klaus Wetscher
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.)
Tyrolit-Schleifmittelwerke Swarovski KG
Original Assignee
Tyrolit-Schleifmittelwerke Swarovski 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.)
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Publication date
Priority to AT1542/90 priority Critical
Priority to AT154290A priority patent/AT394964B/en
Application filed by Tyrolit-Schleifmittelwerke Swarovski KG filed Critical Tyrolit-Schleifmittelwerke Swarovski KG
Publication of EP0468177A1 publication Critical patent/EP0468177A1/en
Application granted granted Critical
Publication of EP0468177B1 publication Critical patent/EP0468177B1/en
Anticipated expiration legal-status Critical
Application status is Expired - Lifetime legal-status Critical

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24DTOOLS FOR GRINDING, BUFFING, OR SHARPENING
    • B24D3/00Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
    • B24D3/02Physical 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
    • B24D3/20Physical 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
    • B24D3/28Resins or natural or synthetic macromolecular compounds
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24DTOOLS FOR GRINDING, BUFFING, OR SHARPENING
    • B24D3/00Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
    • B24D3/02Physical 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
    • B24D3/20Physical 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
    • B24D3/28Resins or natural or synthetic macromolecular compounds
    • B24D3/32Resins or natural or synthetic macromolecular compounds for porous or cellular structure

Description

  • Die Erfindung bezieht sich auf einen Schleifkörper mit einer Matrix aus einem Bindemittel, Schleifkorn und fallweise Füllstoffen. The invention relates to an abrasive article comprising a matrix of a binder, abrasive grain and occasionally fillers.
  • Aufgabe der Erfindung ist es, einen derartigen Schleifkörper dahingehend zu verbessern, daß er bei im wesentlichen unveränderter Standzeit einen kühleren Schliff ermöglicht. The object of the invention is to improve such a grinding body to the extent that it enables a cooler grinding at substantially unchanged life.
  • Insbesondere wenn gehärteter Stahl geschliffen werden muß, ist es wichtig, daß ein Brennen der Schleifscheibe verhindert wird, da sonst Gefügeveränderungen im Werkstück auftreten. In particular, when hardened steel must be ground, it is important that a firing of the grinding wheel is prevented as otherwise structural changes occur in the workpiece.
  • Beispiele für derartige Werkstücke sind Messerklingen, Werkzeuge und Injektionsnadeln. Examples of such workpieces are knife blades, tools and injection needles.
  • Eine Möglichkeit zur Bearbeitung von derartigen Werkstücken ist der Einsatz von porösen Schleifkörpern. One possibility for the machining of workpieces such is the use of porous abrasives. Allerdings tritt dabei der Nachteil eines erhöhten Verschleißes auf, der durch das häufige Schleifen von Kanten, z. However, there is the disadvantage of increased wear occurs by the frequent grinding of edges, z. B. beim Schleifen von Messerklingen hervorgerufen wird. B. caused in the grinding of knife blades.
  • Die erfindungsgemäße Aufgabe wird dadurch gelöst, daß die Matrix, die eine Shore-Härte von zwischen D 35 bis D 95, vorzugsweise D 70 bis D 80 aufweist mit Verfüllungen aus porösen Konglomeraten versehen ist. The inventive object is achieved in that the matrix, which has a Shore hardness of between D 35 and D 95, preferably from D 70 to D 80 is provided with fillings of porous conglomerates.
  • Durch die porösen Konglomerate wird das Kühlmittel besser mitgenommen, wodurch der kühlere Schliff erreicht wird. Through the porous conglomerates, the coolant is better taken, whereby the cooler cut is achieved. Dennoch wird die Festigkeit der Scheibe nicht herabgesetzt und deren Verschleiß nicht erhöht. Nevertheless, the strength of the disc is not reduced and the wear thereof is not increased.
  • Vorteilhaft sind die Verfüllungen aus elastischem Material. the fillings made of elastic material are advantageous. Die elastischen Konglomerate haben sich als schwingungsdämpfend erwiesen, wodurch fallweise die Standzeit des Schleifkörpers verlängert wird, eine bessere Oberfläche erreicht und vor allem das Brennverhalten des Schleifwerkzeuges deutlich verbessert wird. The elastic conglomerates have proven to be a vibration-damping, whereby from case to case, the service life of the grinding wheel is prolonged, achieved a better surface and especially the burning behavior of the grinding tool is significantly improved.
  • Ein Ausführungsbeispiel der Erfindung sieht vor, daß die porösen Konglomerate von Polyurethan Konglomeraten gebildet werden. An embodiment of the invention provides that the porous conglomerates of polyurethane conglomerates are formed.
  • Der Schleifeffekt des Schleifkörpers kann dadurch verbessert werden, daß den porösen Konglomeraten Schleifkorn mit einer Korngröße von 3 µm (1200 mesh) bis 2000 µm (10 mesh) beigegeben ist. The abrasive effect of the abrasive article can be improved in that the porous conglomerates of abrasive grain is added having a grain size of 3 .mu.m (1200 mesh) to 2000 microns (10 mesh).
  • Der Porenraum der Konglomerate beträgt zwischen 5 bis 90 Vol.%, vorzugsweise ca. 50 Vol.%. The pore space of the conglomerates is between 5 to 90 vol.%, Preferably about 50 vol.%.
  • Das den porösen Konglomeraten beigefügte Schleifkorn wird vorteilhaft von Korund oder Siliziumkarbid gebildet. The attached the porous conglomerates of abrasive grain is advantageously formed of corundum or silicon carbide.
  • Den porösen Konglomeraten können weiter noch Füllstoffe, wie z. The porous conglomerates may contain fillers, such further. B. Kreide beigegeben werden. As chalk are added.
  • Die Größe der porösen Konglomerate liegt vorteilhaft zwischen 2 mm und 100 mm (Länge bzw. Durchmesser). The size of the porous conglomerate is advantageously between 2 mm and 100 mm (length and diameter).
  • Ein weiteres Ausführungsbeispiel der Erfindung sieht vor, daß die porösen Konglomerate 1 bis 60 Gew. %, vorzugsweise 20 bis 25 Gew. % des Schleifkörpers ausmachen. A further embodiment of the invention provides that the porous conglomerates 1 to 60 wt.%, Preferably 20 to 25 wt.% Of the abrasive body make up.
  • Nachfolgend wird ein Ausführungsbeispiel der Erfindung anhand der Figuren der beiliegenden Zeichnung beschrieben. An exemplary embodiment of the invention will be described with reference to the figures of the accompanying drawing.
  • Die. The. Fig. 1 zeigt schematisch einen erfindungsgemäßen Schleifkörper und die Fig. 2 zeigt den Ausschnitt der Fig. 1. Fig. 1 shows schematically a grinding body according to the invention and Fig. 2 shows the detail of FIG. 1.
  • Der erfindungsgemäße Schleifkörper besteht aus einer Matrix 1, deren Bindemittel in herkömmlicher Weise von einem Epoxid, einem ungesättigten Polyester, einer mineralischen Bindung, einer Magnesitbindung oder auch von einem hart eingestellten Polyurethan gebildet wird. The abrasive article according to the invention consists of a matrix 1 in which the binder is formed in a conventional manner by an epoxy, an unsaturated polyester, an inorganic bond, a magnesite or by a hard-set polyurethane. Die Matrix 1 ist relativ hart und weist im Ausführungsbeispiel eine Shore-Härte von D 75 auf. The matrix 1 is relatively hard and has a Shore D hardness of 75 on the exemplary embodiment.
  • In der Matrix 1 befinden sich Schleifkörner 2 und herkömmliche Füllstoffe. In the matrix 1 are abrasive grains 2, and conventional fillers.
  • Erfindungsgemäß sind in die Matrix 1 poröse Konglomerate 3 eingebettet. 1 porous conglomerates 3 According to the invention embedded in the matrix.
  • Nachfolgend folgt die Rezeptur eines Ausführungsbeispieles der Erfindung. Subsequently, the formulation of an embodiment of the invention follows.
  • Bei den Prozentangaben handelt es sich, wenn nicht anders angeführt, um Gewichtsprozente. The percentages are, unless stated otherwise, percentages by weight.
    Figure imgb0001
    Figure imgb0002
  • Herstellbeispiel für poröse Konglomerate Preparation of porous conglomerates
  • Zu 24 Gew.Teilen einer Mischung aus Polyolen, tertiärem Amin und Wasser, mit der OH-Zahl 150, werden To 24 parts by weight of a mixture of polyols, tertiary amine and water, having an OH number of 150,
  • 9 9
    Gew.Teile Isocyanat auf Basis Diphenylmethan (MDI) sowie Parts by weight of isocyanate based on diphenylmethane diisocyanate (MDI) as well as
    67 67
    Gew.Teile Schleifkorn, Basis Siliciumkarbid mit der Korngröße 149 µm (100) mesh zugegeben und nach Homogenisierung in Plattenformen vergossen. Parts by weight of abrasive grain, with the grain size of silicon carbide base 149 micrometers (100) mesh was added and after homogenization cast in plate shapes.
  • Man erhält nach zweitägiger Aushärtung bei Raumtemperatur Polyurethanplatten mit folgenden Kennwerten: Is obtained after two-day room temperature cure polyurethane sheets with the following characteristics:
    SHA ca. 50-70 SHA 50-70
    Dichte ca. 1.15 Density about 1.15
    Porenraum ca. 40 Vol% Pore ​​space about 40 vol%
  • Diese werden zu Stücken mit einem mittleren Durchmesser von ca. 20 mm gebrochen und als poröse Konglomerate eingesetzt. These are broken into pieces having an average diameter of about 20 mm and used as the porous conglomerates.
  • I. Herstellbeispiel für verfüllte Schleifkörper I. manufacture of filled grinding
  • Zu 23 Gew.Teilen eines vorformulierten Epoxydharzes mit dem EP-Wert 0.52 werden to be 23 parts by weight of a pre-formulated with the epoxy resin EP-value 00:52
  • 9 9
    Gew.Teile eines Polyamins mit der H-aktiv Äquivalentmasse 75 Parts by weight of a polyamine with the H-active equivalent weight 75
    50 50
    Gew.Teile Edelkorund weiß, Korngröße 177 µm (80 mesh) Parts by weight of white fused alumina, particle size 177 microns (80 mesh)
    8 8th
    Gew.Teile Kryolith parts by weight cryolite

    sowie 10 Gew.Teile Konglomerate laut vorstehendem Herstellbeispiel zugegeben und homogenisiert. and 10 parts by weight of conglomerates according to the above preparation example was added and homogenized.
    Anschließend wurde die Schleifmasse in entsprechende Formen vergossen und die Schleifkörper 10 Stunden bei Raumtemperatur ausgehärtet. Subsequently, the abrasive mass was cast into appropriate molds and the grinding body cured for 10 hours at room temperature. Nach der Entformung wurden die Schleifkörper mittels herkömmlicher Einrichtungen nachbearbeitet (Rundrichten, Bohrungsdrehen usw.). After removal from the mold, the abrasive bodies were reworked by conventional means (rotary straightening, bore turning etc.).
  • Diese Schleifkörper können zum Schleifen von Messerklingen eingesetzt werden. These abrasive bodies can be used to grind blades.
  • II. Herstellbeispiel für verfüllte Schleifkörper II. Manufacture of filled grinding
  • Herstellung analog Beispiel I., Preparation as in Example I,
    jedoch werden however,
  • 14 Gew.Teile 14 parts by weight
    Epoxidharz EP-Wert 0.58 Epoxy resin EP-value 00:58
    4 Gew.Teile 4 parts by weight
    eines Polyamins H-aktiv Äquivalent 50 a polyamine active hydrogen equivalent 50
    60 Gew.Teile 60 parts by weight
    einer Mischung aus Normalkorund und Edelkorund weiß, Korngröße 500 µm (36 mesh) a blend of fused alumina and fused alumina white, particle size 500 microns (36 mesh)
    8 Gew.Teile 8 parts by weight
    Kryolith und cryolite and
    14 Gew.Teile 14 parts by weight
    Konglomerate 3 - siehe Herstellbeispiel Konglomerate - verwendet. Conglomerates 3 - see Preparation conglomerates - used.
  • Schleifkörper nach obiger Rezeptur eignen sich zum Schleifen von Spiralfederenden, Ventilen, Kugellagerringen ua Abrasive body according to the above recipe suitable for grinding of spiral spring ends, valves, ball bearing rings, among others
  • III. III. Herstellbeispiel für verfüllte Schleifkörper Manufacture of filled grinding
  • Zu 27 to 27
    Gew.Teilen einer Mischung eines Polyesters (Basis 0-Phtalsäure, Maleinsäure, 1,2-Propylenglykol 67 % in Styrol) mit 0.1 % Dimethylanilin und 3 % Benzoylperoxid 50 %ig werden 10 Gew.Teile Konglomerat 3 - siehe Herstellbeispiel - zugemischt und vergossen. Parts by weight of a mixture of a polyester (based on 0-phthalic acid, maleic acid, 1,2-propylene glycol in 67% styrene) with 0.1% dimethylaniline and 3% benzoyl peroxide 50% strength, 10 parts by weight of conglomerate 3 - see Preparation - admixed and shed ,
    63 % Siliziumkarbid 149 µm (100 mesh) 63% silicon carbide, 149 micrometers (100 mesh)
    Härtung: 2 Tage bei Raumtemperatur Cured for 2 days at room temperature
    Schleifkörper obiger Zusammensetzung eignen sich zum Schleifen sehr dünner Teile, wie Gemüsemesser, Tortenschaufeln, Bleche usw. Grinding the above composition suitable for grinding very thin parts, such as vegetable knife, cake shovels, plates, etc.

Claims (9)

  1. Abrasive element with a matrix composed of a binder, abrasive grain and, in some cases, fillers, characterised in that the matrix, which has a Shore test hardness of between D 35 and D 95, preferably of D 70 to D 80, is provided with fillers of porous conglomerates (3).
  2. Abrasive element according to claim 1, characterised in that the porous conglomerates (3) are of elastic material.
  3. Abrasive element according to claim 1 or 2, characterised in that the porous conglomerates (3) are formed of polyurethane conglomerates.
  4. Abrasive element according to at least one of claims 1 to 3, characterised in that the porous conglomerate (3) has abrasive grain with a grain size of 3µm to 2000µm added to it.
  5. Abrasive element according to claim 1, characterised in that the space occupied by the pores of the porous conglomerate (3) is between 5 and 90%, preferably about 50% of the volume.
  6. Abrasive element according to claim 4, characterised in that the abrasive grain is corundum, and/or silicon carbide and/or sand and/or garnet.
  7. Abrasive element according to at least one of claims 1 to 6, characterised in that the porous conglomerates (3) have fillers, for example chalk, added to them.
  8. Abrasive element according to at least one of claims 1 to 7, characterised in that the size of the porous conglomerate (3) is between 2 mm and 100 mm.
  9. Abrasive element according to one of claims 1 to 8, characterised in that the porous conglomerate (3) comprises 1 to 60% by weight, preferably 20 to 25% by weight of the abrasive element.
EP19910109390 1990-07-23 1991-06-07 Abrasive wheel Expired - Lifetime EP0468177B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AT1542/90 1990-07-23
AT154290A AT394964B (en) 1990-07-23 1990-07-23 Schleifkoerper

Publications (2)

Publication Number Publication Date
EP0468177A1 EP0468177A1 (en) 1992-01-29
EP0468177B1 true EP0468177B1 (en) 1994-03-30

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EP19910109390 Expired - Lifetime EP0468177B1 (en) 1990-07-23 1991-06-07 Abrasive wheel

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US (1) US5129189A (en)
EP (1) EP0468177B1 (en)
AT (2) AT394964B (en)
DE (1) DE59101266D1 (en)
FI (1) FI94320C (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10117026B4 (en) * 2001-04-05 2005-02-17 Refratechnik Holding Gmbh Fireproof offset refractory molded article thereof and processes for their preparation
WO2003018274A1 (en) * 2001-08-31 2003-03-06 Rem Koolhaas Panel for architectural design
US6679758B2 (en) * 2002-04-11 2004-01-20 Saint-Gobain Abrasives Technology Company Porous abrasive articles with agglomerated abrasives
US7090565B2 (en) * 2002-04-11 2006-08-15 Saint-Gobain Abrasives Technology Company Method of centerless grinding
US7544114B2 (en) * 2002-04-11 2009-06-09 Saint-Gobain Technology Company Abrasive articles with novel structures and methods for grinding
US6988937B2 (en) * 2002-04-11 2006-01-24 Saint-Gobain Abrasives Technology Company Method of roll grinding
US7722691B2 (en) * 2005-09-30 2010-05-25 Saint-Gobain Abrasives, Inc. Abrasive tools having a permeable structure
US20070298240A1 (en) * 2006-06-22 2007-12-27 Gobena Feben T Compressible abrasive article
CN105364731A (en) * 2015-09-28 2016-03-02 沈阳市盛世磨料磨具有限公司 Heavy-load grinding wheel and machining method thereof

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2947616A (en) * 1957-11-12 1960-08-02 Norton Co Grinding wheel structure
US3874856A (en) * 1970-02-09 1975-04-01 Ducommun Inc Porous composite of abrasive particles in a pyrolytic carbon matrix and the method of making it
AT333142B (en) * 1972-08-07 1976-11-10 Swarovski Tyrolit Schleif Schleifkorper
US4421526A (en) * 1972-11-13 1983-12-20 Sherwood Research And Development Partnership Polyurethane foam cleaning pads and a process for their manufacture
DE2813258C2 (en) * 1978-03-28 1985-04-25 Sia Schweizer Schmirgel- & Schleifindustrie Ag, Frauenfeld, Ch
US4350497A (en) * 1980-09-08 1982-09-21 Abraham Ogman Reinforced grinding device
US4541842A (en) * 1980-12-29 1985-09-17 Norton Company Glass bonded abrasive agglomerates
CA1175665A (en) * 1981-02-02 1984-10-09 William F. Zimmer Abrasive article
JPH0356870B2 (en) * 1985-12-16 1991-08-29
US4799939A (en) * 1987-02-26 1989-01-24 Minnesota Mining And Manufacturing Company Erodable agglomerates and abrasive products containing the same

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Publication number Publication date
AT394964B (en) 1992-08-10
FI913468A (en) 1992-01-24
FI94320C (en) 1995-08-25
DE59101266D1 (en) 1994-05-05
FI913468A0 (en) 1991-07-18
FI913468D0 (en)
ATA154290A (en) 1992-01-15
AT103524T (en) 1994-04-15
FI94320B (en) 1995-05-15
US5129189A (en) 1992-07-14
EP0468177A1 (en) 1992-01-29

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