WO2011092021A1 - Corps abrasif renfermant des particules additionnelles obtenues à partir de corps abrasifs recyclés et procédé de fabrication dudit corps abrasif - Google Patents

Corps abrasif renfermant des particules additionnelles obtenues à partir de corps abrasifs recyclés et procédé de fabrication dudit corps abrasif Download PDF

Info

Publication number
WO2011092021A1
WO2011092021A1 PCT/EP2011/000386 EP2011000386W WO2011092021A1 WO 2011092021 A1 WO2011092021 A1 WO 2011092021A1 EP 2011000386 W EP2011000386 W EP 2011000386W WO 2011092021 A1 WO2011092021 A1 WO 2011092021A1
Authority
WO
WIPO (PCT)
Prior art keywords
abrasive
grinding
additional particles
region
particles
Prior art date
Application number
PCT/EP2011/000386
Other languages
German (de)
English (en)
Inventor
Bernd-Arno Behrens
Matthias Kammler
Fabian Lange
Original Assignee
Gottfried Wilhelm Leibniz Universität Hannover
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 Gottfried Wilhelm Leibniz Universität Hannover filed Critical Gottfried Wilhelm Leibniz Universität Hannover
Publication of WO2011092021A1 publication Critical patent/WO2011092021A1/fr

Links

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
    • 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
    • B24D3/34—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties
    • B24D3/342—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties incorporated in the bonding agent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D5/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor
    • B24D5/02—Wheels in one piece

Definitions

  • the invention relates to a grinding body made of pressed and sintered material.
  • the present invention relates to an abrasive article which has additive particles, in particular abrasive particles, in a predetermined range.
  • the invention also relates to a process for the preparation of these abrasive articles, as well as grinding devices containing abrasive articles of the invention, and to the use of recycled particulate filler particles for the production thereof.
  • abrasive articles are made exclusively from new abrasive materials and suitable binders, since the requirements are very high, especially with regard to safety and product liability issues in particular rotating abrasive.
  • abrasive particles of grain and binder are molded (pressed) into a (green) compact or green compact in a first step and then optionally sintered.
  • Abrasive materials are subject to the most extreme mecha-
  • DE 44 465 91 A1 discloses the production of an abrasive article and this abrasive article itself.
  • This recyclable abrasive has two sections, an outer grinding zone and a non-abrasive zone.
  • This non-abrasive active zone is formed from a reusable, non-packaged, possibly reinforcing agent and / or filler contained organic plastic material and can be reused.
  • On this non-abrasive zone which forms a so-called basic body, there is the grinding zone of grain and binder. This grinding zone is applied to the body and associated with suitable thermosetting plastics. After use of the grinding wheel, the remainders of the grinding zone are removed mechanically and a new grinding zone is applied to the base made of preferably plastic.
  • the object of the invention is therefore the provision of abrasive bodies with improved breaking strengths and methods for their preparation.
  • Another object of the invention is to provide methods of making abrasive articles using abrasive article materials containing abrasive grain to enable recycling of spent abrasive wheels and to allow for later recycling of the abrasive articles.
  • the present invention relates to abrasive articles comprising grain and binder having a first region adjacent to the abrasive surface forming the abrasive region, and a second region having a receiving region for attachment to a tool carrier forming a backing region, characterized in that second range of additional particles, the average diameter of these additional Particles equal to at least twice the mean diameter of the grain. That is, the second region is characterized by the fact that here, in addition to the grain and binder, additional particles are present which have at least twice the value of the mean diameter of the grain. Preferably, these additional particles have at least three times the diameter of the grain used in the second region, such as at least five times, for example at least ten times.
  • the additional particles have at least twice the diameter of the average diameter of the grain used.
  • the term “diameter” or “thickness” is understood here to mean the diameter, and in the case of angular or edge-shaped shapes, the thickness in relation to the axis perpendicular to the pressing direction. These terms are used interchangeably.
  • the mean diameter of the grain is understood to be the average diameter of the grain to be pressed, the same applies to the additional particles.
  • the shape of the additional particles to be introduced is a non-edged additive particle.
  • These non-angular additive particles can be present in particular in the form of lenses, spheres, in the form of broken grain forms or in stochastic forms.
  • the invention is achieved by introducing the additional particles that due to the position, the shape and the proportion, the density distribution is changed in compacts such that the crack inclination or fracture tendency is not influenced or even reduced compared to an abrasive article without additional particles, while achieving an increase in strength becomes.
  • the density distribution in the pressed and sintered workpiece is more homogeneous.
  • the introduction of the additional particles in the second region of the abrasive particles does not impair the density distribution in the abrasive article. Rather, it is even possible to achieve a targeted influence on the improvement of the strength properties.
  • the fracture crack tendency of the abrasive bodies which is a major problem especially with abrasive wheels and constitutes a safety-relevant aspect when grinding wheels are used, is improved by introducing the additional particles into the second area of the wheels while improving the strength properties of the wheels.
  • this makes it possible to provide abrasive articles in which material from spent abrasive articles is used.
  • the abrasive articles of the invention may e.g. prepared by the following procedure.
  • the position, shape and / or quantities of the additional particles to be introduced for influencing the density distribution in the compact or grinding body are determined.
  • the density distribution and thus the breaking strength of the resulting abrasive article are positively influenced.
  • an inhomogeneous density distribution which may still be present after pressing, is improved by sintering in such a way that the density distribution in the grinding body is largely homogeneous.
  • an improvement in the density distribution and thus an improvement in the breaking strength in the area of the tool holder of the grinding body is achieved.
  • the area of the tool holder is exposed to the greatest loads during operation.
  • radial, tangential and axial loads as well as vibration loads meet each other.
  • the abrasive particle of grain and binder in both areas has advantageous properties by the introduction of the additive particles in the second region.
  • the abrasive body is formed in both areas of the same grain and binder.
  • the added porous filler particles are particularly preferably those which are identical in their composition to the constituents of the abrasive article, the grain and binder.
  • the porous additional particles are recycled particles of used abrasive articles. These grinding wheels are eg crushed and classified if necessary. When introducing these available from abrasive bodies available additional particles that have been correspondingly crushed and possibly classified, an increase in strength of the abrasive body can be found especially in the tool holder. Thereby, a substantial increase in strength can be achieved in the area in which these additional particles were introduced, without leading to an increase in the tendency to cracking.
  • a template for introducing the preferably recycled additional particles can be prepared, which are correspondingly introduced into the pre-prepared powder compact according to the recyklelten additional particles.
  • the binders of the abrasive article are ceramic binders known in the art.
  • the grinding wheels are designed as a grinding wheel, grinding pin, grinding cone or grinding segment.
  • the first area is arranged on the outside in the radial axis and ends with the grinding surface, while the second area is arranged in the radial direction with respect to the first area.
  • the introduced in the second region additional particles are preferably in the way that a gradient is formed.
  • the gradient is designed such that it decreases in the direction of the first region. That is, preferably, the gradient decreases from the surface for the receiving area for attachment in the tool carrier, the tool holder.
  • the abrasive article is constructed such that the first region makes up at least a third of the distance between the abrasive surface and the surface with a receiving region of the tool carrier. As shown in FIG. 1, in a body having a radial axis, this distribution is such that the first area forming the grinding area is disposed radially outward with respect to the second area.
  • the additional particles which are introduced in the second region of the abrasive body are in a preferred proportion of at least 0.5 vol .-%, preferably at least 1 vol .-% and preferably at most up to 50 vol .-% based on the total amount of grain in the grinding wheel.
  • the amount of additive particles, based on the total amount of grain in the abrasive article is between 1% by volume to 40% by volume, e.g. at least 3% by volume, such as at least 5% by volume and at least a maximum of 30% by volume, such as at least a maximum of 20% by volume.
  • the introduced additional particles may be formed preferably lenticular or elongated.
  • these additional particles When introducing these additional particles into the material to be pressed, e.g. by sprinkling, these additional particles are due to gravity perpendicular to the pressing direction. This has the consequence that in the increase in strength above the additional particles, the pressing of the blank, an increase in strength is achieved above the additional particles, longitudinally but geometry caused a negligibly small density reduction.
  • density distribution is meant the quantitative detection of different densities within a pressed or sintered body.
  • Sintering is a heat treatment of powders or compacts, e.g. Greening, at temperatures below the melting point of the base material to increase the strength by binding of its particles with each other.
  • the starting material for the pressing process As a material to be pressed, the starting material for the pressing process, the grain with binder, is referred to below.
  • a compact also called green compact
  • the product is named after the pressing process, in which the starting material has a certain relationship.
  • This compact or green compact is then fed to further processing steps, such as sintering.
  • the compacts can be produced from grain and binders and, if appropriate, further constituents.
  • the introduction of the additional particles can also be carried out according to known methods.
  • bonded abrasive bodies represent composite materials produced by molding technology, which in principle are composed of three components. These components consist of the actual abrasive, the abrasive grain, an application-specific selected binder and individually set pore spaces. With volume fractions V K between 40 and 60% by volume, the abrasive, the grain, forms the largest fraction. These are usually corundum, silicon carbide, zirconium corundum (corundum and zirconium oxide in an electic composition) or industrial diamonds. As a further component are application specific selected binder, which ensures the cohesion of the abrasive body in the form of so-called binding bridges.
  • Ceramic bonded abrasive articles contain bond volumes V B between 5 and 30% by volume, such as between 5 and 20% by volume. These are usually glassy amorphous melting porcelain-like sintering mixture whose starting materials usually consist of feldspar, kaolin, various quartzes, porcelain flours, lime spars, glass powder and various metal oxides.
  • density gradients in the pressed product, produced during the pressing of the material to be pressed can lead to undesired distortions during the subsequent sintering process. This can lead to cracking during pressing, sintering and operation of the grinding wheels. It is therefore necessary to strive for the lowest possible density gradient during the production of the grinding wheels during pressing or during sintering.
  • a corresponding method is provided which allows improvement of the density gradient, i. a more homogeneous density distribution.
  • This homogeneous density distribution is achieved all the more surprising, although additional particles are introduced into the material to be pressed, which differ in size from the grain.
  • the method for producing the abrasive bodies further comprises the known methods for the production of pressed and sintered abrasive articles, as they are generally described and known in the prior art.
  • the process is carried out in such a way that for the production of grinding bodies, the step of introducing additional particles into a mixture of grain and binder in a second region of a material to be pressed for the grinding body is carried out, these additive particles are additive particles according to the invention, and the step of compressing the additive particles containing Guts in the second region together with a first area containing no additional particles.
  • the section through the grinding wheel shows a first region 2 which forms the grinding region and the second region 3.
  • the additional particles 4 are preferably porous additional particles, in particular additional particles recycled from used grinding bodies, obtained by comminution and, if appropriate, classifying the grinding bodies.
  • the additional particles 4 are those which have the same composition as the abrasive body containing grain and binder.
  • a surface of the first area forms the grinding surface 5. While the second area has a surface 6 with a receiving area for attachment to the tool carrier. The gradient of the introduced additional particles extending radially outward from the region of the tool holder is also shown.
  • the first region is formed such that it is at least a third of the distance between the surface 6 and the grinding surface 5.
  • the grinding wheel according to the invention is characterized by a high durability and reliability.
  • these grinding wheels according to the invention are characterized in that they exhibit improved strength, without worsening the tendency to crack, in particular in the heavily loaded second region in the direction of the tool holder.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Abstract

L'invention concerne, selon un premier aspect, un corps abrasif (1) constitué d'un matériau compacté et fritté. L'invention concerne en particulier un corps abrasif (1) contenant, dans une zone prédéfinie (3), des particules additionnelles (4), en particulier des particules additionnelles (4) obtenues à partir de corps abrasifs. L'invention concerne en outre un procédé de fabrication de ces corps abrasifs (1) ainsi que des dispositifs abrasifs contenant les corps abrasifs (1) selon l'invention, et l'utilisation de particules additionnelles (4) réalisées à partir de corps abrasifs (1) recyclés pour la fabrication desdits corps abrasifs.
PCT/EP2011/000386 2010-01-28 2011-01-28 Corps abrasif renfermant des particules additionnelles obtenues à partir de corps abrasifs recyclés et procédé de fabrication dudit corps abrasif WO2011092021A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010006250A DE102010006250A1 (de) 2010-01-28 2010-01-28 Schleifkörper und Verfahren zur Herstellung hiervon
DE102010006250.2 2010-01-28

Publications (1)

Publication Number Publication Date
WO2011092021A1 true WO2011092021A1 (fr) 2011-08-04

Family

ID=43875343

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/000386 WO2011092021A1 (fr) 2010-01-28 2011-01-28 Corps abrasif renfermant des particules additionnelles obtenues à partir de corps abrasifs recyclés et procédé de fabrication dudit corps abrasif

Country Status (2)

Country Link
DE (1) DE102010006250A1 (fr)
WO (1) WO2011092021A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013213654B4 (de) * 2012-07-13 2017-06-29 Toyoda Van Moppes Ltd. Keramisch gebundener Schleifstein
EP3471918A4 (fr) * 2016-06-16 2020-01-15 Mirka Ltd. Procédé et appareil de production de matériau abrasif

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4604106A (en) * 1984-04-16 1986-08-05 Smith International Inc. Composite polycrystalline diamond compact
DE4446591A1 (de) 1994-12-24 1996-06-27 Schleifmittel Werk Karl Seiffe Recyclefähige Schleifkörperzonen
WO2001064399A1 (fr) * 2000-02-29 2001-09-07 Tyrolit Schleifmittelwerke Swarovski K.G. Meule
US20030032384A1 (en) * 2001-08-01 2003-02-13 Noritake Co., Limited Grinding wheel, a process of manufacturing the grinding wheel and a process of reclaiming the grinding wheel

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19635941C2 (de) * 1995-09-07 2002-06-06 Weber & Reik Schleifmittelwerk Recyclat auf Basis thermisch aufbereiteter, kunstharzgebundener Schleifkörperreste bzw. -abfälle, Verfahren zu dessen Herstellung und Verwendung dieses Recyclates
US6749653B2 (en) * 2002-02-21 2004-06-15 3M Innovative Properties Company Abrasive particles containing sintered, polycrystalline zirconia
DE102008035854B4 (de) * 2008-08-01 2011-05-05 Gottfried Wilhelm Leibniz Universität Hannover Verfahren zur Herstellung von Presslingen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4604106A (en) * 1984-04-16 1986-08-05 Smith International Inc. Composite polycrystalline diamond compact
DE4446591A1 (de) 1994-12-24 1996-06-27 Schleifmittel Werk Karl Seiffe Recyclefähige Schleifkörperzonen
WO2001064399A1 (fr) * 2000-02-29 2001-09-07 Tyrolit Schleifmittelwerke Swarovski K.G. Meule
US20030032384A1 (en) * 2001-08-01 2003-02-13 Noritake Co., Limited Grinding wheel, a process of manufacturing the grinding wheel and a process of reclaiming the grinding wheel

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
BEHRENS ET AL., MATERIALWISSENSCHAFT UND WERKSTOFFTECHNIK, vol. 38, no. 10, pages 816 - 820

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013213654B4 (de) * 2012-07-13 2017-06-29 Toyoda Van Moppes Ltd. Keramisch gebundener Schleifstein
EP3471918A4 (fr) * 2016-06-16 2020-01-15 Mirka Ltd. Procédé et appareil de production de matériau abrasif

Also Published As

Publication number Publication date
DE102010006250A1 (de) 2011-08-18

Similar Documents

Publication Publication Date Title
EP3083869B1 (fr) Procédé de production de corps abrasifs
EP2938691B1 (fr) Grain abrasif avec une section concave
EP3083870B1 (fr) Procédé de fabrication de particules abrasives multicouches
EP2692816A1 (fr) Grain abrasif avec corps plats se pénétrant
EP1538134A1 (fr) Matériau Composite Fibre-Céramique Poreux
DE102008042375A1 (de) Verfahren zur Herstellung einer Gussform zum Vergießen von Metallschmelzen
DE102008054596A1 (de) Offenzellige Keramik- und/oder Metallschäume mit rauer umhüllender Oberfläche und Verfahren zu ihrer Herstellung
DE102016100196A1 (de) Geformte Sinterschleifkörner auf Basis von Aluminiumoxid mit Anteilen an mineralogischen Phasen bestehend aus Mullit, Tialit und/oder Armalcolit und Baddeleyit und/oder Srilankit sowie ein Verfahren zu ihrer Herstellung
EP2999677B1 (fr) Procede de reduction de la dilatation reversible d'un objet refractaire contenant du graphite
CH676433A5 (fr)
EP3411171B1 (fr) Procédé de fabrication d'un corps en métal dur tridimensionnel par couches
WO2000053359A2 (fr) Matiere pour la fabrication par couches d'outils, de formes ou de pieces par le frittage laser
WO2011092021A1 (fr) Corps abrasif renfermant des particules additionnelles obtenues à partir de corps abrasifs recyclés et procédé de fabrication dudit corps abrasif
DE102011053740A1 (de) Verfahren zur Herstellung eines Hartstoff-Körpers, zugehöriges sintermetallurgisches Pulver und daraus herstellbarer Hartstoff-Rohling und Hartstoffkörper
DE102019207389A1 (de) Verfahren zur additiven und/oder generativen Herstellung eines Bauteils sowie ein Kraftfahrzeug
DE112019001807T5 (de) Hochporöser, keramisch gebundener CBN-Schleifstein homogenen Aufbaus
DE1458285A1 (de) Verfahren zur Herstellung von mehrschichtigen poroesen Gegenstaenden aus Sintermetallen
DE102005032331B4 (de) Mischkeramik mit hoher Bruchzähigkeit, Verfahren zu ihrer Herstellung und ihre Verwendung
DE202018104180U1 (de) Generativ gefertigtes Schleifwerkzeug zur Bearbeitung von Hartstoffen und Composites
DE102010049443A1 (de) Bauteil, insbesondere Triebwerkskomponente, mit einem Zuordnungsmerkmal sowie Verfahren
WO2018149567A1 (fr) Procédé de frittage sous pression de composants en acier, ledit composant en acier fritté sous pression et utilisation d'une poudre d'acier spéciale en tant que matériau de départ pour sa fabrication
DE3729700C2 (de) Verfahren zur Herstellung von preßfähigem Granulat für die Fertigung von Produkten aus gesintertem keramischen Werkstoff
EP3721107B1 (fr) Materiaux composite de palier coulissant et son procédé de fabrication et palier coulissant
DE3404871A1 (de) Schleif-, hon- oder abreibkoerper
WO2024089236A1 (fr) Mélange granulaire pour fabrication additive

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 11703384

Country of ref document: EP

Kind code of ref document: A1

122 Ep: pct application non-entry in european phase

Ref document number: 11703384

Country of ref document: EP

Kind code of ref document: A1