EP1166966A2 - Instandsetzung von Glasbearbeitungsdiamantschneidern - Google Patents
Instandsetzung von Glasbearbeitungsdiamantschneidern Download PDFInfo
- Publication number
- EP1166966A2 EP1166966A2 EP01114417A EP01114417A EP1166966A2 EP 1166966 A2 EP1166966 A2 EP 1166966A2 EP 01114417 A EP01114417 A EP 01114417A EP 01114417 A EP01114417 A EP 01114417A EP 1166966 A2 EP1166966 A2 EP 1166966A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- glass
- processing
- sharpening body
- use according
- sharpening
- 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.)
- Withdrawn
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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
- B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
-
- 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
-
- 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
- B24D3/10—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 for porous or cellular structure, e.g. for use with diamonds as abrasives
Definitions
- the present invention relates to achieving / restoring the usability of the Working surface of glass processing diamond cutting, which at least from a solid Machining material body and a three-dimensional matrix made of diamond particles in Binding material exist, the working surface of the glass processing Glass processing blade is moved over the surface of the glass to be ground.
- the amount of diamond particles bound by the matrix material is very large.
- the particles usually have a size of 5 ⁇ m - 500 ⁇ m , although larger or smaller particles can also occur.
- the particles are placed on the working surface and deepened perpendicular to the working surface.
- the glass is processed by pressing the processing cutting edge onto the glass surface to be processed and usually moving it in a circular manner along the surface, the glass processing cutting edge usually being set in rotary motion and either the glass piece or the glass processing cutting edge being moved back and forth.
- the diamond particles of the cutting edge loosen very small particles from the glass surface.
- This type of processing is similar to grinding, since the processing takes place with the surface of the processing device, that is, by counter-movement of the surfaces of the cutting edge and the glass piece.
- glass surfaces such. B. shaped into optical lenses, glass can be cut or pierced, etc.
- Metal such as copper or copper alloys or aluminum or aluminum alloys, or plastic is often used as the matrix material or binding material.
- the space of the matrix material can take up 30 - 90%, although other ratios also occur.
- the remaining amount of material consists of diamond particles.
- the cutting edge is attached to a steel arm with which it is attached to the glass processing machine.
- the machining efficiency of such glass machining edges has been restored in a conventional manner by rubbing the surface of the machining edges against a normal grindstone or moving them on a metal plate with abrasive material.
- Normal grindstones consist of appropriately coarse granules formed into a solid piece, i.e. of carborundum granules or silicon carbide (SiC), or aluminum oxide granules (Al 2 O 3 ) or both.
- restoring the machining efficiency with such grinding stones and the abovementioned or comparable grinding materials as sharpening bodies takes a very long time, the actual sharpening process being lengthy, but the machining efficiency can usually only be partially restored. In some cases, there is no noticeable improvement in machining efficiency.
- the use of standard grindstones also usually requires the glass processing cutter to be removed from the glass processing machine, which takes time and incurs additional costs.
- the aim of the present invention is to restore machining efficiency
- the problems described above can be solved and goals achieved, if for achieving / restoring machining efficiency as a sharpening material porous ceramic or glass material is used in which the ceramic surrounding the pores or glass material contains micro fractures.
- the glass material of the sharpening body is essential is harder than the hardness of the binding material of the three-dimensional matrix, but essential softer than crystalline aluminum oxide and silicon carbide.
- FIGS. 1A-1E Different glass processing cutting edges 1 are shown in FIGS. 1A-1E from a usually metallic frame 5 and from one or more processing material bodies 2.
- the body 2 are at the head of a rod or tubular Frame 5 ( Figures 1A - 1C), on a side surface of a disc-shaped frame 5th ( Figure 1D) or on the round surface of a disc-shaped frame 5 ( Figure 1E) attached.
- the piece of glass to be processed is not shown in the figures. In practice there are hundreds of different glass cutting edges in the glass processing industry 1. The cutting edges shown are therefore only examples; the present The invention is in no way limited to these examples.
- the solid processing material body 2 of the glass processing cutting edge 1 consists of diamond particles 8 in a binding material 9 forming a three-dimensional matrix, wherein the machining material body 2 has a machining surface 3.
- the diamond particles 8 are in the processing material body 2 on the processing surface 3 and deepened on this inserted a depth or thickness S. So it is not a layer in which Particles lie next to each other in only one layer, but the processing material body 2 clearly has a thickness S that can be used to restore machining area efficiency can use, so in the possibly repeated process of repair the processing surface 3 in a state in which they effectively process glass pieces can.
- the glass processing cutting edges 1 are rotated during processing R brought around its axis line.
- the cutting edges can only Execute movements V straight or in arcs in one direction or crosswise.
- the Art movement should not be seen as a limiting factor.
- the angle of the cutting edge 1 during machining in relation to the surface of the workpiece to be machined Glass pieces can be changed, as shown in Figure 3 by the angle of inclination K.
- the frame 5 also has other, not shown in the figures Parts, e.g. B. for attachment to a glass processing machine 20 or for Introduction of cutting fluid from a channel to the processing point.
- the processing surface 3 of the processing material body 2 of the glass processing cutting edge 1 can be repaired / efficient using the present invention, for example by using a sharpening body 4 made of porous ceramic such as glass, on which one of any glass processing cutting edges 1 is moved back and forth under pressure.
- the sharpening body 4 can therefore be made of the same material as the glass piece used in the machining process, but must not, as is usual with glass, consist of completely uniform amorphous material, but must have sufficiently evenly distributed micro-fractures, which have a lower strength than the material itself.
- the distance between the break points must be at least 0.8 ⁇ m and at most 800 ⁇ m .
- the cross section P of the splinters should be as small as possible, that is to say in the micrometer range.
- the size of the ceramic or glass splinters and thus the distance between the break points perhaps to 2 ⁇ m - 300 ⁇ m can be limited.
- the sharpening body 4 obviously does not have to have a large proportion of pores; but the pores must be sufficiently close together to ensure the formation of fractures with the distances described above in a homogeneous distribution throughout the sharpening body 4.
- the ceramic material or glass material of the sharpening body 4 must have a much greater hardness than the binding material that forms the three-dimensional matrix of the machining material body 2 of the glass machining blade 1 and at the same time have a significantly lower hardness than ceramic aluminum oxide Al 2 O 3 and silicon carbide SiC.
- the ceramic splinters or glass fragments detaching from the sharpening body in the process described above can detach the binding material 9 described above without having any influence on the size or shape of the diamond particles 8 protruding from the binding material 9.
- a sharpening body 4 produced according to the present invention improves this aspect.
- the hardness of the ceramic material or glass material of the sharpening body 4 is preferably between at least Mohs 5 and at most Mohs 7.
- the size of the pores 10 of the sharpening body 4 is normally between 0.8 ⁇ m and 800 ⁇ m, preferably between 2 ⁇ m and 300 ⁇ m, which approximately the appropriate size described above which solved ceramic or glass splinters and the distances and the cross section P of the breaking points can be reached.
- the proportion of pores in the sharpening body 4 is at least 10% or preferably at least 20%. In typical sharpening bodies, the proportion of pores in the space can be between 30% and 60% if, according to the present invention, the type of glass filter is used which is used for filtering liquids and / or gases and / or for mixing gases in liquids with e.g. B. chemical laboratory work can be used.
- the described sharpening body 4 is produced in a cost-saving manner by sintering glass granulate 7, which is produced by crushing larger pieces of glass.
- the glass granules 7 forming the walls of the pores 10 in the sharpening body 4 are sharp-edged, and the contact points created by the sintering have a relatively small cross-section P, as a result of which micro-break points 11 described above arise.
- the ceramic or glass splinters that become detached during the sharpening process are clearly sharp-edged, as a result of which they can better remove the binding material 9 that forms the three-dimensional matrix from the machining surface 3 when achieving / restoring the work effectiveness. If the sharpening body 4 were made from round glass grains, the result would probably be worse.
- the sharpening body 4 preferably consists of ceramic material or glass material which contains silicon oxide SiO 2 as the main component.
- the glass material can additionally contain boron oxide B 2 O 3 and / or phosphorus oxide P 2 O 5 and / or sodium oxide Na 2 O and / or potassium oxide K 2 O and / or aluminum oxide Al 2 O 3 as a mixing component, the total weight proportion of which, however, does not exceed 50% and can normally reach a maximum of 30%.
- the glass material of the sharpening body 4 is at least for the most part amorphous, just like normal glass.
- the present invention has been tested by using a commercially available chemical Laboratory-developed glass filters, such as the VitraPOR®, a registered article of the company ROBU GLASFILTER-GER ⁇ TE GMBH, more precisely the filter types P 500 - P 1.6, as a sharpening body for the repair of the machining material body 2 with diamond particles 8 in glass machining edges of the type described above was used.
- a commercially available chemical Laboratory-developed glass filters such as the VitraPOR®, a registered article of the company ROBU GLASFILTER-GER ⁇ TE GMBH, more precisely the filter types P 500 - P 1.6, as a sharpening body for the repair of the machining material body 2 with diamond particles 8 in glass machining edges of the type described above was used.
- the processing machine 20 with their normal Settings is operated with the pressure F of the glass processing cutter 1, the speed of rotation R, the directions of movement V in relation to the surface of the Glass piece or in this case the sharpening body 4, and the possible inclination K.
- This Values can of course be changed for the repair process; but
- the processing surface 3 of the Glass processing cutter 1 for such a long repair time on the sharpening body 4 back and forth until material from the sharpening body to a depth H that at least Is 0.2 mm, is removed.
- the processing surface 3 removes the glass processing cutting edge normally at least 0.5 mm or at least 1 mm, but mostly at most 1.5 - 2 mm. This process usually takes at least 5 seconds and 1 minute at most, but usually 10 - 30 seconds, after which the glass processing cutting edge is back in good working order.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
Abstract
Description
- Figuren 1A - 1E
- zeigen beispielhaft einige Typen von Glasbearbeitungsschneiden, deren Bearbeitungseffizienz durch Verwendung der Schärfkörper gemäß vorliegender Erfindung wiederherzustellen ist, dargestellt im Längsschnitt durch die Drehachse.
- Figuren 2A - 2C
- zeigen das Prinzip des inneren Aufbaus von gemäß vorliegender Erfindung hergestellten Schärfkörpern, in bedeutend vergrößertem Maßstab.
- Figur 3
- stellt schematisch eine Glasbearbeitungsmaschine und eine Glasbearbeitungsschneide bei der Erreichung/Wiederherstellung der Arbeitseffizienz unter Verwendung der Glasbearbeitungsmaschine nach dem Prinzip der vorliegender Erfindung dar.
- Figur 4
- zeigt mehrere Granulatkörner eines Schleifkörpers, der gemäß vorliegender Erfindung hergestellt wurde, in vergrößertem Maßstab und in gleicher Ansicht wie in Figuren 2A - 2C.
Claims (11)
- Erreichen/Wiederherstellen der Gebrauchsfähigkeit der Arbeitsoberflächen (3) von Glasbearbeitungsschneiden (1), die wenigstens aus einem festen Bearbeitungsmaterialkörper (2) und einer dreidimensionalen Matrize aus Diamantpartikeln (8) in Bindematerial (9) bestehen, wobei die Arbeitsoberfläche (3) der jeweiligen Glasbearbeitungsschneide (1) auf der Oberfläche eines Schärfkörpers (4) bewegt wird, dadurch gekennzeichnet, dass als Schärfkörper (4) für die Erreichung/Wiederherstellung der Gebrauchsfähigkeit poröse Keramik oder poröses Glas verwendet wird und dass die die Poren (10) des Schärfkörpers (4) umgebenden Keramik- oder Glaswände Mikrobruchstellen (11) aufweisen.
- Anwendung nach Anspruch 1, dadurch gekennzeichnet, dass das poröse Keramik- oder Glasmaterial des Schärfkörpers (4) eine wesentlich höhere Härte als das die dreidimensionale Matrize bildende Bindematerial (9) der Glasbearbeitungsschneide (1) und eine wesentlich niederere Härte aufweist als kristallines Aluminiumoxid (Al2O3) und Siliciumcarbid (SiC).
- Anwendung nach Anspruch 2, dadurch gekennzeichnet, dass das poröse Keramik- oder Glasmaterial des Schärfkörpers (4) wenigstens Mohs-Härte 5 und höchstens Mohs-Härte 7 aufweist.
- Anwendung nach Anspruch 1, dadurch gekennzeichnet, dass die Distanz der Mikrobruchstellen (11) im porösen Keramik- oder Glasmaterial des Schärfkörpers (4) mindestens 0,8 µm und höchstens 800 µm beträgt und dass die Distanz der Mikrobruchstellen zwischen 2 µm und 300 µm liegt.
- Anwendung nach Anspruch 1, dadurch gekennzeichnet, dass der Raumanteil der Poren (10) im porösen Keramik- oder Glasmaterial des Schärfkörpers (4) mindestens 10 %, oder mindestens 20 %, oder zwischen 30 % und 60 % liegt.
- Anwendung nach Anspruch 1, dadurch gekennzeichnet, dass der Schärfkörper (4) sich in der Bearbeitungsmaschine an gleicher Stelle und in gleicher Position befindet wie ein normales zu bearbeitendes Glasstück, und dass die Erreichung/Wiederherstellung der Gebrauchsfähigkeit der Glasbearbeitungsschneide (1) durch Verwendung der Bearbeitungsmaschine mit ihren normalen Arbeitseinstellungen geschieht.
- Anwendung nach Anspruch 1 oder 6, dadurch gekennzeichnet, dass die Arbeitsoberfläche (3) der Glasbearbeitungsschneide (3) auf dem Schärfkörper (4) mit Bewegungsgeschwindigkeiten (V, K, R) bewegt wird, die zwischen dem 0,2-fachen und 5-fachen der jeweiligen Bewegungsgeschwindigkeit bei der eigentlichen Glasbearbeitung liegen, und mit einem Druck (F), der zwischen dem 0,1-fachen und 10-fachen der Druckkraft der Glasbearbeitungsschneide auf dem zu bearbeitenden Glasstück bei der eigentlichen Glasbearbeitung liegt.
- Anwendung nach Anspruch 1, 6 oder 7, dadurch gekennzeichnet, dass die Bearbeitungsfläche (3) der Glasbearbeitungsschneide (1) für eine so lange Instandsetzungszeit auf dem Schärfkörper (4) hin- und herbewegt wird, dass aus dem erwähnten Schärfkörper Material einer Tiefe (H) entfernt wird, wobei die erwähnte Tiefe mindestens 0,2 mm oder mindestens 0,5 mm oder mindestens 1 mm beträgt und dass die Instandsetzungszeit mindestens 5 Sekunden und höchstens 1 Minute dauert.
- Anwendung nach Anspruch 1, dadurch gekennzeichnet, dass der Schärfkörper (4) aus porösem Keramik- oder Glasmaterial besteht, das als Hauptbestandteil Siliciumoxid (SiO2) und als Mischkomponente mindestens einen der folgenden Bestandteile enthält: Boroxid (B2O3), Phosphoroxid (P2O5), Natriumoxid (Na2O), Kaliumoxid (K2O) und Aluminiumoxid (Al2O3), und dass das Glasmaterial des Schärfkörpers (4) zumindest zum Großteil amorph ist.
- Anwendung nach Anspruch 1 oder 9, dadurch gekennzeichnet, dass der Schärfkörper (4) aus in Sinterung zusammengeschmolzenem zerkleinertem Glasgranulat besteht.
- Anwendung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Schärfkörper (4) aus porösem Glasmaterial ein Glasfilter der Art ist, die für das Filtern von Flüssigkeiten und/oder Gasen und/oder das Untermischen von Gasen unter Flüssigkeiten hergestellt wird.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI20001451 | 2000-06-19 | ||
FI20001451A FI20001451A (fi) | 2000-06-19 | 2000-06-19 | Lasintyöstöterien kunnostus |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1166966A2 true EP1166966A2 (de) | 2002-01-02 |
EP1166966A3 EP1166966A3 (de) | 2003-10-29 |
Family
ID=8558586
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01114417A Withdrawn EP1166966A3 (de) | 2000-06-19 | 2001-06-15 | Instandsetzung von Glasbearbeitungsdiamantschneidern |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1166966A3 (de) |
FI (1) | FI20001451A (de) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4494964A (en) * | 1983-04-18 | 1985-01-22 | Perstorp Ab | Porous ceramic abrasive wheel or ceramic filter |
WO1997049647A1 (en) * | 1996-06-26 | 1997-12-31 | Minnesota Mining And Manufacturing Company | Method for making ceramic materials from boehmite |
-
2000
- 2000-06-19 FI FI20001451A patent/FI20001451A/fi unknown
-
2001
- 2001-06-15 EP EP01114417A patent/EP1166966A3/de not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4494964A (en) * | 1983-04-18 | 1985-01-22 | Perstorp Ab | Porous ceramic abrasive wheel or ceramic filter |
WO1997049647A1 (en) * | 1996-06-26 | 1997-12-31 | Minnesota Mining And Manufacturing Company | Method for making ceramic materials from boehmite |
US5728184A (en) * | 1996-06-26 | 1998-03-17 | Minnesota Mining And Manufacturing Company | Method for making ceramic materials from boehmite |
Also Published As
Publication number | Publication date |
---|---|
FI20001451A (fi) | 2000-06-19 |
EP1166966A3 (de) | 2003-10-29 |
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