EP1424165A1 - System and method for grinding glass and for the dressing of a glass grinding wheel - Google Patents

System and method for grinding glass and for the dressing of a glass grinding wheel Download PDF

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Publication number
EP1424165A1
EP1424165A1 EP03020651A EP03020651A EP1424165A1 EP 1424165 A1 EP1424165 A1 EP 1424165A1 EP 03020651 A EP03020651 A EP 03020651A EP 03020651 A EP03020651 A EP 03020651A EP 1424165 A1 EP1424165 A1 EP 1424165A1
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EP
European Patent Office
Prior art keywords
diamond
grinding wheel
dressing
glass
diamond grinding
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.)
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Application number
EP03020651A
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German (de)
French (fr)
Inventor
Hans-Robert Dr. Meyer
Gunter Steckel
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.)
Saint Gobain Diamantwerkzeuge GmbH and Co KG
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Saint Gobain Diamantwerkzeuge GmbH and Co KG
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Publication of EP1424165A1 publication Critical patent/EP1424165A1/en
Withdrawn legal-status Critical Current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
    • B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
    • B24B7/20—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground
    • B24B7/22—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground for grinding inorganic material, e.g. stone, ceramics, porcelain
    • B24B7/24—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground for grinding inorganic material, e.g. stone, ceramics, porcelain for grinding or polishing glass
    • 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
    • B24B53/00—Devices or means for dressing or conditioning abrasive surfaces
    • B24B53/12—Dressing tools; Holders therefor
    • 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
    • B24D3/04—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 inorganic
    • B24D3/06—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 inorganic metallic or mixture of metals with ceramic materials, e.g. hard metals, "cermets", cements
    • 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 system for grinding glass and Dressing a glass grinding wheel according to the preamble of patent claim 1.
  • the invention relates to a grinding wheel for grinding of glass and a method for grinding glass and for dressing the Grinding wheel according to claim 2 or 3.
  • the profile of the Is adapted to the profile to be sanded.
  • the grinding wheel profile the negative to the workpiece profile.
  • the grinding task exists in the profile with a given tolerance with a given surface roughness to be produced in a short time with a long grinding wheel service life.
  • the profile history parallel to the disc axis causes a different chip thickness across the wheel width and thus a different load on the grinding wheel profile on the grinding wheel surface and thus an uneven Tread wear.
  • the uneven profile wear can also be caused by different Grinding wheel diameter over the width of the wheel.
  • the grinding wheel is removed from the production machine disassembled and mounted on a dressing machine, on which the The grinding wheel is dressed.
  • the profile is known the diamond grinding wheel by grinding with a silicon carbide grinding wheel rework in ceramic or bakelitic bond until profile and Grinding ability again meet the requirements. Because the silicon carbide grinding wheel wears much faster than the diamond grinding wheel, is one of these
  • the preparation process cannot be automated and therefore takes a long time and limits the geometry of possible profiles. For example, in this way no smooth thread profiles are generated.
  • the diamond grinding wheel is often used brought back to the manufacturer for the dressing. Unless there are several grinding wheels available anyway, this means a longer downtime of the production grinding machine.
  • the routing ones Dressing tools can carry the full workpiece profile. In this Trap is referred to as profile dressing or profile dressing roles.
  • the dressing takes place using a suitable CNC control.
  • the dressing roller carries a suitable radius profile on its surrounding surface.
  • the invention has for its object to provide a system for grinding glass a profiled diamond grinding wheel and for dressing the diamond grinding wheel specify that is relatively easy to do and the Production process is only minimally interrupted.
  • a bond is made for the grinding wheel chosen, which is composed of silicate glass and metal parts, preferably Copper is used.
  • the production grinding machine contains a CNC-controlled Dressing device in which a diamond form dressing roller can be clamped is.
  • a grinding wheel is used for Grinding glass is highly effective and ensures a long service life. About that It can also be dressed with a diamond form dressing roller. Requires the diamond grinding wheel preparation of the profile and / or restoration the grinding properties, the diamond grinding wheel remains clamped. she will then with the help of the diamond form dressing roll in the production machine inside trained in no time.
  • the invention also relates to a profiled diamond grinding wheel for glass, which for the grinding of glass is excellent, but also with the help of a Diamond dressing roll can be dressed.
  • a diamond grinding wheel contains a silicate glass-metal compound, preferably copper for the Metal content.
  • the diamond grinding wheel 30 is used up to 65 vol .-% metal, preferably 30 to 50 vol .-%.
  • the relationship is corresponding of the silicate glass part to the metal part.
  • the binding can also be a filler additive contain from 5 to 25 vol .-%.
  • the filler additive graphite and / or boron nitride.
  • the system according to the invention and the method according to claim 3 can be perform advantageously with a form dressing roller, the diamond coating is arranged perpendicular to the axis of rotation and has a thickness in the axial direction that the Diameter or one and a half times the diameter of the diamond grains.
  • a form dressing roll is described, for example, in EP 116 668.
  • the use of such a form dressing roll is particularly advantageous.
  • the base body of such a form dressing roll consists, for example, of steel and the covering layer can be between the base body and another component be included.
  • a form dressing roll can be used, the covering of at least one layer and in which individual diamond grains are classified in narrow Size in a plane perpendicular to the axis of rotation of the form dressing roll after a predetermined setting scheme are arranged so that the area geometry of the Dressing roller remains almost constant as wear progresses.
  • the topping can also consists of two or more layers, with individual diamond grains in each layer in a narrowly classified size in a plane perpendicular to the axis of rotation of the Form dressing roll are arranged according to a predetermined setting scheme, the Diamond grains of one layer in the gap between the diamond grains of the other layer and partially stand into the other layer in such a way that the circumferential geometry of the dressing roller approximates as wear progresses remains constant.
  • a two-layer covering has one Width of 1.5 times the grain size.
  • the size of the diamond grains is chosen that natural at the edges of the surface regardless of the progress of wear Radii are created that have a given smallest concave radius of a grinding wheel corresponding.
  • the setting scheme for the diamonds on the topping after The above embodiment has e.g. at least one spiral on which the diamond are set, the center of the spiral on the axis of rotation of the Form dressing roll lies.
  • Several geometrically identical spirals can also be provided be with a common center, being the largest diameter is spaced apart by an angular distance in the circumferential direction.
  • the proposed form dressing roller is primarily used for dressing diamond grinding wheels in ceramic, metallic or synthetic resin bond.
  • Diamond grinding wheels With ceramic bonds glass is ground not considered. The reason is that often, mostly uncontrolled, the dreaded Burning of the glass occurs, i.e. in places on the glass surface extremely high roughness. The reason is that between the ceramic Grinding wheel bond and the glass material a high coefficient of friction occurs, which leads to strong heat generation. The heat can be due to the low Thermal conductivity of both glass and ceramics also through special good coolant cannot be drained off sufficiently.
  • the temperature is preferably between 700 and 850 ° C and the Pressure is between 2.5 and 8 KN per qcm.
  • the base can also have holes that after the Placement scheme are arranged, e.g. in the form of a spiral and a diamond comm take up. If there are several layers, these are prepared and stacked separately, possibly with relative displacement or rotation, the stack being cold pressed. Finally, if necessary, grinding or finishing of the thus produced takes place Form dressing role.

Abstract

The diamond layer of the diamond disc has a hybrid, silicate glass/metal bonding. The dressing disc is a diamond shape-dressing form-roller with a diamond layer. The production machine includes a CNC-controlled dressing unit, in which the dressing roller is clamped. An Independent claim is included for the corresponding method of grinding glass.

Description

Die Erfindung bezieht sich auf ein System zum Schleifen von Glas und zum Abrichten einer Glasschleifscheibe nach dem Oberbegriff des Patentanspruchs 1. Darüber hinaus bezieht sich die Erfindung auf eine Schleifscheibe zum Schleifen von Glas sowie auf ein Verfahren zum Schleifen von Glas und zum Abrichten der Schleifscheibe nach Patentanspruch 2 bzw. 3.The invention relates to a system for grinding glass and Dressing a glass grinding wheel according to the preamble of patent claim 1. In addition, the invention relates to a grinding wheel for grinding of glass and a method for grinding glass and for dressing the Grinding wheel according to claim 2 or 3.

Zum Profilschleifen von Werkstoffen aus Glas, insbesondere solchen mit hohem Anteil von Blei (Kristallglas), aber auch von Glasscheiben für z.B. Automobile werden derzeit Schleifscheiben mit einem Diamantbelag verwendet. Die Diamanten werden in einer Metallbindung gehalten, wobei das Bindungsmetall meistens aus einer Bronze besteht, welcher zur Modifikation der Schleifeigenschaften z.B. Kobalt, Silber und/oder andere Füllstoffe zugesetzt werden. Daneben sind auch Bindungen aus Stahl in unterschiedlichen Zusammensetzungen sowie aus Messing bekannt geworden. Beim Schleifen von Profilen, z.B. von V-förmigen Nuten in Gegenständen aus Glas, wie Karaffen, Vasen, Pokalen, Trinkgläsern oder dergleichen, aber auch von Profilen an Glaskanten von Automobilscheiben werden profilierte Diamantschleifscheiben verwendet. Es versteht sich, dass das Profil des Schleifbelages an das zu schleifende Profil angepasst ist. Damit stellt das Schleifscheibenprofil das Negativ zum Werkstückprofil dar. Die Schleifaufgabe besteht darin, das Profil in vorgegebener Toleranz mit einer vorgegebenen Oberflächenrauheit in kurzer Zeit bei langer Schleifscheibenstandzeit zu erzeugen. Der Profilverlauf parallel zur Scheibenachse bewirkt eine unterschiedliche Spanungsdicke über die Scheibenbreite und damit eine unterschiedliche Belastung des Schleifscheibenprofils an der Schleifscheibenumfläche und somit einen ungleichmäßigen Profilverschleiß. Der ungleichmäßige Profilverschleiß kann auch durch unterschiedliche Schleifscheibendurchmesser über die Scheibenbreite verursacht sein.For profile grinding of glass materials, especially those with high Share of lead (crystal glass), but also of glass panes for e.g. Become automobiles grinding wheels with a diamond coating are currently used. The diamonds are held in a metal bond, the bond metal mostly from a bronze, which is used to modify the grinding properties e.g. Cobalt, silver and / or other fillers can be added. There are also bonds made of steel in different compositions as well as brass known. When grinding profiles, e.g. of V-shaped grooves in Objects made of glass, such as carafes, vases, cups, drinking glasses or the like, but also profiles on glass edges of automobile windows are profiled Diamond grinding wheels used. It is understood that the profile of the Is adapted to the profile to be sanded. With this, the grinding wheel profile the negative to the workpiece profile. The grinding task exists in the profile with a given tolerance with a given surface roughness to be produced in a short time with a long grinding wheel service life. The profile history parallel to the disc axis causes a different chip thickness across the wheel width and thus a different load on the grinding wheel profile on the grinding wheel surface and thus an uneven Tread wear. The uneven profile wear can also be caused by different Grinding wheel diameter over the width of the wheel.

Nach einer gewissen Schleifzeit, die naturgemäß von den Einstellparametern, der Schleifsscheibenspezifikation, dem Kühlmittel und dem Glaswerkstoff abhängt, überschreitet das Profil der Schleifscheibe die vorgegebene Toleranz, oder ihr Schleifvermögen reicht für die gestellte Aufgabe nicht mehr aus. Damit ist das Ende der Standzeit für die Schleifscheibe erreicht. Die Schleifscheibe muss danach aufbereitet werden.After a certain grinding time, which of course depends on the setting parameters, the Grinding wheel specification, the coolant and the glass material, If the profile of the grinding wheel exceeds the specified tolerance, or you Grinding capacity is no longer sufficient for the task at hand. That is the end the service life for the grinding wheel is reached. The grinding wheel must then be prepared become.

Bei derzeit angewendeten Verfahren wird die Schleifscheibe von der Produktionsmaschine demontiert und auf eine Abrichtmaschine montiert, auf der dann das Abrichten der Schleifscheibe erfolgt. In diesem Zusammenhang ist bekannt, das Profil der Diamantschleifscheibe durch ein Schleifen mit einer Siliziumkarbid-Schleifscheibe in keramischer oder bakelitischer Bindung nachzuarbeiten, bis Profil und Schleifvermögen wieder den Anforderungen entsprechen. Da die Siliziumkarbid-Schleifscheibe viel schneller verschleißt als die Diamantschleifscheibe, ist ein derartiger Aufbereitungsvorgang nicht automatisierbar, benötigt daher eine längere Zeit und schränkt die Geometrie möglicher Profile ein. So können auf diese Art zum Beispiel keine feingängigen Gewindeprofile erzeugt werden. Häufig wird die Diamantschleifscheibe zum Hersteller zurückgebracht, damit dieser das Abrichten vornimmt. Soweit nicht ohnehin mehrere Schleifscheiben zur Verfügung stehen, bedeutet dies einen längeren Stillstand der Produktionsschleifmaschine.With currently used processes, the grinding wheel is removed from the production machine disassembled and mounted on a dressing machine, on which the The grinding wheel is dressed. In this context, the profile is known the diamond grinding wheel by grinding with a silicon carbide grinding wheel rework in ceramic or bakelitic bond until profile and Grinding ability again meet the requirements. Because the silicon carbide grinding wheel wears much faster than the diamond grinding wheel, is one of these The preparation process cannot be automated and therefore takes a long time and limits the geometry of possible profiles. For example, in this way no smooth thread profiles are generated. The diamond grinding wheel is often used brought back to the manufacturer for the dressing. Unless there are several grinding wheels available anyway, this means a longer downtime of the production grinding machine.

Es ist auch bekannt, ein Schleifscheibenprofil bzw. seine Regenerierung durch Funkenerosion zu erzeugen. Hierzu bedarf es einer gesonderten Maschine mit längerer Prozesszeit. Allerdings lassen sich hierdurch feinere Profile verwirklichen. It is also known to carry out a grinding wheel profile or its regeneration To produce spark erosion. This requires a separate machine with a longer one Process time. However, this enables finer profiles to be achieved.

Konventionelle Schleifscheiben, die Schleifmittel wie Siliziumkarbid oder Korund enthalten, lassen sich in einfacher Weise auf einer Schleifmaschine mit Hilfe von Diamantwerkzeugen aufbereiten bzw. profilieren und abrichten. Hierzu werden sowohl stehende als auch rotierende Diamantabrichtwerkzeuge verwendet. Die routierenden Abrichtwerkzeuge können das volle Werkstückprofil tragen. In diesem Falle wird von einem Profilabrichten bzw. von Profilabrichtrollen gesprochen. Alternativ findet das Abrichten mit Hilfe einer geeigneten CNC-Steuerung statt. In diesem Falle trägt die Abrichtrolle ein geeignetes Radiusprofil an ihrer Umfläche.Conventional grinding wheels that use abrasives such as silicon carbide or corundum included, can be easily on a grinding machine with the help of Prepare or profile and dress diamond tools. To do this both standing and rotating diamond dressing tools are used. The routing ones Dressing tools can carry the full workpiece profile. In this Trap is referred to as profile dressing or profile dressing roles. Alternatively, the dressing takes place using a suitable CNC control. In In this case, the dressing roller carries a suitable radius profile on its surrounding surface.

Der Erfindung liegt die Aufgabe zugrunde, ein System zum Schleifen von Glas mit einer profilierten Diamantschleifscheibe sowie zum Abrichten der Diamantschleifscheibe anzugeben, das verhältnismäßig einfach durchgeführt werden kann und den Produktionsprozess nur minimal unterbricht.The invention has for its object to provide a system for grinding glass a profiled diamond grinding wheel and for dressing the diamond grinding wheel specify that is relatively easy to do and the Production process is only minimally interrupted.

Diese Aufgabe wird durch die Merkmale des Patentanspruchs 1 gelöst.This object is achieved by the features of patent claim 1.

Bei dem erfindungsgemäßen System wird für die Schleifscheibe eine Bindung gewählt, die sich aus Silikatglas und Metallteilen zusammensetzt, wobei vorzugsweise Kupfer verwendet wird. Die Produktionsschleifmaschine enthält eine CNC-gesteuerte Abrichtvorrichtung, in welcher eine Diamant-Formabrichtrolle einspannbar ist.In the system according to the invention, a bond is made for the grinding wheel chosen, which is composed of silicate glass and metal parts, preferably Copper is used. The production grinding machine contains a CNC-controlled Dressing device in which a diamond form dressing roller can be clamped is.

Bei dem erfindungsgemäßen System wird eine Schleifscheibe verwendet, die für das Schleifen von Glas hoch wirksam ist und eine lange Standzeit gewährleistet. Darüber hinaus ist sie mit einer Diamantformabrichtrolle abrichtbar. Erfordert die Diamantschleifscheibe eine Aufbereitung des Profils und/oder die Wiederherstellung der Schleifeigenschaften, bleibt die Diamantschleifscheibe eingespannt. Sie wird dann mit Hilfe der Diamantformabrichtrolle in der Produktionsmaschine innerhalb kürzester Zeit abgerichtet.In the system according to the invention, a grinding wheel is used for Grinding glass is highly effective and ensures a long service life. About that It can also be dressed with a diamond form dressing roller. Requires the diamond grinding wheel preparation of the profile and / or restoration the grinding properties, the diamond grinding wheel remains clamped. she will then with the help of the diamond form dressing roll in the production machine inside trained in no time.

Die Erfindung betrifft auch eine profilierte Diamantschleifscheibe für Glas, die für das Schleifen von Glas hervorragend geeignet ist, gleichwohl auch mit Hilfe einer Diamantformabrichtrolle abgerichtet werden kann. Eine derartige Diamantschleifscheibe enthält eine Silikatglas-Metall-Verbindung, vorzugsweise Kupfer für den Metallanteil.The invention also relates to a profiled diamond grinding wheel for glass, which for the grinding of glass is excellent, but also with the help of a Diamond dressing roll can be dressed. Such a diamond grinding wheel contains a silicate glass-metal compound, preferably copper for the Metal content.

Nach einer Ausgestaltung der Erfindung verwendet die Diamantschleifscheibe 30 bis 65 Vol.-% Metall, vorzugsweise 30 bis 50 Vol.-%. Entsprechend ist das Verhältnis des Silikatglasanteils zum Metallanteil. Die Bindung kann auch einen Füllerzusatz von 5 bis 25 Vol.-% enthalten. Nach einer Ausgestaltung der Erfindung ist der Füllerzusatz Grafit und/oder Bornitrid.According to an embodiment of the invention, the diamond grinding wheel 30 is used up to 65 vol .-% metal, preferably 30 to 50 vol .-%. The relationship is corresponding of the silicate glass part to the metal part. The binding can also be a filler additive contain from 5 to 25 vol .-%. According to one embodiment of the invention the filler additive graphite and / or boron nitride.

Das erfindungsgemäße System bzw. das Verfahren nach Patentanspruch 3 lässt sich vorteilhafterweise mit einer Formabrichtrolle durchführen, deren Diamantbelag senkrecht zur Drehachse angeordnet ist und in Achsrichtung eine Dicke hat, die dem Durchmesser oder dem eineinhalbfachen Durchmesser der Diamantkörner entspricht. Eine derartige Formabrichtrolle ist etwa in EP 116 668 beschrieben. Die Verwendung einer derartigen Formabrichtrolle ist besonders vorteilhaft anzusehen. Der Grundkörper einer derartigen Formabrichtrolle besteht zum Beispiel aus Stahl und die Belagschicht kann zwischen dem Grundkörper und einem weiteren Bauteil eingeschlossen sein. Auf die Formabrichtrolle nach der genannten Druckschrift wird hiermit ausdrücklich Bezug genommen.The system according to the invention and the method according to claim 3 can be perform advantageously with a form dressing roller, the diamond coating is arranged perpendicular to the axis of rotation and has a thickness in the axial direction that the Diameter or one and a half times the diameter of the diamond grains. Such a form dressing roll is described, for example, in EP 116 668. The The use of such a form dressing roll is particularly advantageous. The base body of such a form dressing roll consists, for example, of steel and the covering layer can be between the base body and another component be included. On the form dressing roll according to the document mentioned hereby expressly referred.

Alternativ kann eine Formabrichtrolle verwendet werden, deren Belag aus mindestens einer Schicht besteht und bei der einzelne Diamantkörner in eng klassierter Größe in einer Ebene senkrecht zur Drehachse der Formabrichtrolle nach einem vorgegebenen Setzschema so angeordnet sind, dass die Umflächengeometrie der Abrichtrolle im Verschleißfortschritt annähernd konstant bleibt. Der Belag kann auch aus zwei oder mehr Schichten besteht, wobei in jeder Schicht einzelne Diamantkörner in eng klassierter Größe in einer Ebene senkrecht zur Drehachse der Formabrichtrolle nach einem vorgegebenen Setzschema angeordnet sind, wobei die Diamantkörner der einen Schicht in der Lücke zwischen den Diamantkörnern der anderen Schicht liegen und teilweise in die andere Schicht hineinstehen dergestalt, dass die Umflächengeometrie der Abrichtrolle im Verschleißfortschritt annähernd konstant bleibt. Ein aus zwei Schichten bestehender Belag hat zum Beispiel eine Breite von 1,5 mal der Körnungsgröße. Die Größe der Diamantkörner ist so gewählt, dass an den Rändern des Belags unabhängig vom Verschleißfortschritt natürliche Radien entstehen, die einem vorgegebenen kleinsten konkaven Radius einer Schleifscheibe entsprechend. Das Setzschema für die Diamanten bei dem Belag nach dem obigen Ausführungsbeispiel weist z.B. mindestens eine Spirale auf, auf die die Diamanten gesetzt sind, wobei der Mittelpunkt der Spirale auf der Drehachse der Formabrichtrolle liegt. Es können auch mehrere geometrisch gleiche Spiralen vorgesehen werden mit einem gemeinsamen Mittelpunkt, wobei der größte Durchmesser um einen Winkelabstand in Umfangsrichtung beabstandet ist.Alternatively, a form dressing roll can be used, the covering of at least one layer and in which individual diamond grains are classified in narrow Size in a plane perpendicular to the axis of rotation of the form dressing roll after a predetermined setting scheme are arranged so that the area geometry of the Dressing roller remains almost constant as wear progresses. The topping can also consists of two or more layers, with individual diamond grains in each layer in a narrowly classified size in a plane perpendicular to the axis of rotation of the Form dressing roll are arranged according to a predetermined setting scheme, the Diamond grains of one layer in the gap between the diamond grains of the other layer and partially stand into the other layer in such a way that the circumferential geometry of the dressing roller approximates as wear progresses remains constant. For example, a two-layer covering has one Width of 1.5 times the grain size. The size of the diamond grains is chosen that natural at the edges of the surface regardless of the progress of wear Radii are created that have a given smallest concave radius of a grinding wheel corresponding. The setting scheme for the diamonds on the topping after The above embodiment has e.g. at least one spiral on which the diamond are set, the center of the spiral on the axis of rotation of the Form dressing roll lies. Several geometrically identical spirals can also be provided be with a common center, being the largest diameter is spaced apart by an angular distance in the circumferential direction.

Eine Formabrichtrolle der zuletzt beschriebenen Art ist in der europäischen Patentanmeldung 02 010 000.4 vorgeschlagen worden.A form dressing roll of the type described last is in the European one Patent application 02 010 000.4 has been proposed.

Die vorgeschlagene Formabrichtrolle dient in erster Linie zum Abrichten von Diamantschleifscheiben in keramischer, metallischer oder Kunstharzbindung. Diamantschleifscheiben mit keramischer Bindung kommen jedoch zum Schleifen von Glas nicht in Betracht. Der Grund ist, dass häufig, meist unkontrolliert, das gefürchtete Brennen des Glases auftritt, d.h. es werden stellenweise auf der Glasoberfläche extrem hohe Rauheiten erzeugt. Der Grund ist der, dass zwischen der keramischen Schleifscheibenbindung und dem Glaswerkstoff ein hoher Reibungskoeffizient auftritt, der zu starker Wärmeerzeugung führt. Die Wärme kann aufgrund der geringen Wärmeleitfähigkeit sowohl von Glas als auch von Keramik auch durch besonders gute Kühlmittel nicht in ausreichendem Maße abgeführt werden.The proposed form dressing roller is primarily used for dressing diamond grinding wheels in ceramic, metallic or synthetic resin bond. Diamond grinding wheels With ceramic bonds, however, glass is ground not considered. The reason is that often, mostly uncontrolled, the dreaded Burning of the glass occurs, i.e. in places on the glass surface extremely high roughness. The reason is that between the ceramic Grinding wheel bond and the glass material a high coefficient of friction occurs, which leads to strong heat generation. The heat can be due to the low Thermal conductivity of both glass and ceramics also through special good coolant cannot be drained off sufficiently.

Bei der Herstellung der erfindungsgemäßen Diamantschleifscheibe wird die beschriebene aus keramischen und metallischen Anteilen bestehende Bindung mit Diamant vermengt und anschließend unter Druck und erhöhter Temperatur verpresst, wobei die Temperatur vorzugsweise zwischen 700 und 850°C liegt und der Druck zwischen 2,5 und 8 KN pro qcm beträgt.In the manufacture of the diamond grinding wheel according to the invention described consisting of ceramic and metallic parts with Diamond mixed and then pressed under pressure and elevated temperature, the temperature is preferably between 700 and 850 ° C and the Pressure is between 2.5 and 8 KN per qcm.

Bei einer Formabrichtrolle der zuletzt genannten Art wird eine galvanische oder Sinterbindung mit hohem Wolframanteil bevorzugt. Die Körnungsgröße ist gleich oder <1,5 mm und die Länge des Schleifbelags in Zustellrichtung beträgt vorzugsweise zwischen 5 und 10 mm. Ein Verfahren zur Herstellung einer derartigen Diamantformabrichtrolle sieht die folgenden Schritte vor:

  • Setzen der Diamantkörner nach dem vorgegebenen Setzschema auf eine ringförmige schmelzbare Unterlage, vorzugsweise mit Schmelzschicht
  • Zugabe von Bindungspulver
  • Kaltpressen des Materials
  • Sintern und
  • Umfangsschleifen des so hergestellten Materials.
In the case of a form dressing roll of the last-mentioned type, a galvanic or sintered bond with a high proportion of tungsten is preferred. The grain size is equal to or <1.5 mm and the length of the abrasive coating in the feed direction is preferably between 5 and 10 mm. A method for producing such a diamond form dressing roll provides the following steps:
  • Place the diamond grains on the ring-shaped meltable base, preferably with a melt layer, according to the specified setting scheme
  • Add binding powder
  • Cold pressing the material
  • Sintering and
  • Circumferential grinding of the material so produced.

Anstelle des Klebmittels kann die Unterlage auch Löcher aufweisen, die nach dem Setzschema angeordnet sind, z.B. in Form einer Spirale und die ein Diamantkom aufnehmen. Bei mehreren Schichten werden diese getrennt vorbereitet und gestapelt, ggf. unter Relativverschiebung oder -drehung, wobei der Stapel kaltgepresst wird. Abschließend erfolgt ggf. ein Schleifen bzw. Endbearbeiten der so hergestellten Formabrichtrolle.Instead of the adhesive, the base can also have holes that after the Placement scheme are arranged, e.g. in the form of a spiral and a diamond comm take up. If there are several layers, these are prepared and stacked separately, possibly with relative displacement or rotation, the stack being cold pressed. Finally, if necessary, grinding or finishing of the thus produced takes place Form dressing role.

Claims (11)

System zum Schleifen von Glas mit einer in einer Produktionsmaschine eingespannten profilierten Diamantschleifscheibe und zum Abrichten der Diamantschleifscheibe mittels einer Abrichtschleifscheibe, dadurch gekennzeichnet, dass der Diamantbelag der Diamantschleifscheibe eine Hybridbindung Silikatglas/Metall aufweist, die Abrichtschleifscheibe eine Diamantformabrichtrolle ist mit einem Diamantbelag und die Produktionsmaschine eine CNC-gesteuerte Abrichtvorrichtung enthält, in der die Diamantformabrichtrolle einspannbar ist.System for grinding glass with a profiled diamond grinding wheel clamped in a production machine and for dressing the diamond grinding wheel by means of a dressing grinding wheel, characterized in that the diamond coating of the diamond grinding wheel has a hybrid bond of silicate glass and metal, the dressing grinding wheel is a diamond form dressing roll with a diamond coating and the production machine is a CNC -controlled dressing device in which the diamond form dressing roll can be clamped. Profilierte Diamantschleifscheibe zum Schleifen von Glas, die einen Diamantschleifbelag aufweist, dadurch gekennzeichnet, dass der Diamantschleifbelag eine Silikatglas-Metall-Bindung aufweist.Profiled diamond grinding wheel for grinding glass, which has a diamond grinding coating, characterized in that the diamond grinding coating has a silicate glass-metal bond. Verfahren zum Schleifen von Glas mit einer profilierten Diamantschleifscheibe und zum Abrichten der Diamantschleifscheibe mit den folgenden Schritten: in einer Produktionsmaschine wird das Werkstück aus Glas mit einer Diamantschleifscheibe geschliffen, deren Diamantbelag eine Silikat-Metall-Bindung aufweist das Abrichten bei eingespannter Diamantschleifscheibe in der Produktionsmaschine erfolgt mit einer Diamantformabrichtrolle mittels einer CNC-Steuerung. Method for grinding glass with a profiled diamond grinding wheel and dressing the diamond grinding wheel with the following steps: In a production machine, the glass workpiece is ground with a diamond grinding wheel, the diamond coating of which has a silicate-metal bond Dressing with a diamond grinding wheel clamped in the production machine is carried out with a diamond form dressing roller using a CNC control. System oder Diamantschleifscheibe nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Bindung der Diamantschleifscheibe Kupfer enthält. System or diamond grinding wheel according to claim 1 or 2, characterized in that the bond of the diamond grinding wheel contains copper. System oder Diamantschleifscheibe nach Anspruch 4, dadurch gekennzeichnet, dass Kupfer 20 bis 65 Vol-% der Bindung ausmacht.System or diamond grinding wheel according to claim 4, characterized in that copper accounts for 20 to 65% by volume of the bond. System oder Diamantschleifscheibe nach Anspruch 5, dadurch gekennzeichnet, dass Kupfer etwa 30 bis 50 Vol.-% der Bindung ausmacht.System or diamond grinding wheel according to claim 5, characterized in that copper accounts for about 30 to 50 vol .-% of the bond. System oder Diamantschleifscheibe nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Silikatglasanteil 35 bis 70 Vol.-% beträgt.System or diamond grinding wheel according to claim 1 or 2, characterized in that the silicate glass portion is 35 to 70 vol .-%. System oder Diamantschleifscheibe nach Anspruch 7, dadurch gekennzeichnet, dass der Silikatglasanteil etwa 40 bis 60 Vol.-% beträgt.System or diamond grinding wheel according to claim 7, characterized in that the silicate glass portion is about 40 to 60 vol .-%. System oder Diamantschleifscheibe nach einem der Ansprüche 4 bis 8, dadurch gekennzeichnet, dass die Bindung einen Füllerzusatz von 5 bis 25 Vol.-% enthält.System or diamond grinding wheel according to one of claims 4 to 8, characterized in that the bond contains a filler additive of 5 to 25% by volume. System oder Diamantschleifscheibe nach Anspruch 9, dadurch gekennzeichnet, dass der Füllerzusatz Grafit und/oder Bornitrid enthält.System or diamond grinding wheel according to claim 9, characterized in that the filler additive contains graphite and / or boron nitride. System nach Anspruch 1, dadurch gekennzeichnet, dass der sich senkrecht zur Drehachse der Formabrichtrolle erstreckende Belag der Formabrichtrolle in Achsrichtung eine Dicke aufweist, die dem Durchmesser der Diamantkörner oder dem eineinhalbfachen Durchmesser der Diamantkörner entspricht.System according to claim 1, characterized in that the covering of the form dressing roll , which extends perpendicular to the axis of rotation of the form dressing roll, has a thickness in the axial direction which corresponds to the diameter of the diamond grains or one and a half times the diameter of the diamond grains.
EP03020651A 2002-11-28 2003-09-11 System and method for grinding glass and for the dressing of a glass grinding wheel Withdrawn EP1424165A1 (en)

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Citations (6)

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Publication number Priority date Publication date Assignee Title
GB715528A (en) * 1951-11-20 1954-09-15 Carborundum Co Metal-ceramic bonded granular material
US4157897A (en) * 1977-04-14 1979-06-12 Norton Company Ceramic bonded grinding tools with graphite in the bond
DE4104266A1 (en) * 1991-02-13 1992-08-20 Getesoft Ges Fuer Tech Compute Dressing machine for grinding wheel - has softer wheel following grinding wheel contours and with oscillations about dressing edge for even wear
DE19511157A1 (en) * 1994-03-28 1995-10-05 Phillips J D Corp Dressing grinding surfaces made of crystalline boron nitride (CBN)
US5833520A (en) * 1993-04-07 1998-11-10 Nec Corporation Mirror polishing device
DE20116927U1 (en) * 2001-09-24 2002-01-03 Saint Gobain Winter Diamantwer System for dressing a grinding wheel

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3403720A1 (en) * 1984-02-03 1985-08-08 Wilhelm 8372 Zwiesel König GRINDING MACHINE FOR GRINDING WORKPIECES, ESPECIALLY DECORATIVE GRINDING MACHINE FOR GRINDING HOLLOW GLASSES
DE3942285C1 (en) * 1989-12-21 1991-04-25 Naxos-Union Schleifmittel- Und Schleifmaschinenfabrik Ag, 6000 Frankfurt, De Dressing rotating grinding plate - by locating diamond dressing plate parallel to grinding plate and contacting both plates for specified period
DE4306642B4 (en) * 1993-03-03 2004-07-08 3M Espe Ag Process for the preparation of substrate surfaces for bonding
SK14402000A3 (en) * 1998-03-27 2001-10-08 Norton Company Abrasive tools

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB715528A (en) * 1951-11-20 1954-09-15 Carborundum Co Metal-ceramic bonded granular material
US4157897A (en) * 1977-04-14 1979-06-12 Norton Company Ceramic bonded grinding tools with graphite in the bond
DE4104266A1 (en) * 1991-02-13 1992-08-20 Getesoft Ges Fuer Tech Compute Dressing machine for grinding wheel - has softer wheel following grinding wheel contours and with oscillations about dressing edge for even wear
US5833520A (en) * 1993-04-07 1998-11-10 Nec Corporation Mirror polishing device
DE19511157A1 (en) * 1994-03-28 1995-10-05 Phillips J D Corp Dressing grinding surfaces made of crystalline boron nitride (CBN)
DE20116927U1 (en) * 2001-09-24 2002-01-03 Saint Gobain Winter Diamantwer System for dressing a grinding wheel

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