EP1248696B1 - Meule abrasive et procede de fabrication d'une telle meule - Google Patents

Meule abrasive et procede de fabrication d'une telle meule Download PDF

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Publication number
EP1248696B1
EP1248696B1 EP01907613A EP01907613A EP1248696B1 EP 1248696 B1 EP1248696 B1 EP 1248696B1 EP 01907613 A EP01907613 A EP 01907613A EP 01907613 A EP01907613 A EP 01907613A EP 1248696 B1 EP1248696 B1 EP 1248696B1
Authority
EP
European Patent Office
Prior art keywords
abrasive grains
layer
station
abrasive
manufacturing
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
EP01907613A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1248696A1 (fr
Inventor
Georges Bancon
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 Abrasifs Technologie et Services SAS
Original Assignee
Saint Gobain Abrasifs Technologie et Services SAS
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Publication date
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Application filed by Saint Gobain Abrasifs Technologie et Services SAS filed Critical Saint Gobain Abrasifs Technologie et Services SAS
Publication of EP1248696A1 publication Critical patent/EP1248696A1/fr
Application granted granted Critical
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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
    • B24D5/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor
    • B24D5/12—Cut-off wheels
    • 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
    • B24D5/14—Zonally-graded wheels; Composite wheels comprising different abrasives

Definitions

  • the invention relates to an abrasive wheel of the thin wheel type, comprising several layers of stacked constituents agglomerated by pressure.
  • Such wheels are made by stacking, generally around a central metal ring, a protective paper disc, a sheet reinforcement generally made of fabric or similar meshed, perforated or dimpled, with a layer of abrasive grains, also with another backing sheet usually fabric or the like, and possibly another disc of paper protection; then the stack is generally heated; then she is pressed, and thus the abrasive grain layer and the mesh reinforcement layers, perforated or dimpled are generally at least partially nested by following the penetration of the abrasive grains into the meshes, perforations or alveoli.
  • these grinding wheels have a remote hub, that is to say that the part of the grinding wheel which is in the immediate vicinity of the central ring does not does not extend in the same plane as the part which surrounds it, and the grinding wheel is mounted on the grinding machine in such a way that this part further away from the ring be the most protruding beyond the machine; the wheel is therefore generally used for surfacing only on the surface on the side opposite to the machine, of this part; for cutting, it is naturally the around the same part that is most requested. It is therefore essential that this part contains very high performance abrasive grains, and unnecessarily expensive that the part close to the ring has the same abrasive grains as is the case with conventional grinding wheels.
  • the circumferential speed abrasive grains close to the periphery is much superior to that of grains more close to the ring, and thus the optimal abrasive for the two regions is not necessarily the same.
  • the object of the invention is to remedy these drawbacks known wheels, by proposing an abrasive wheel of the wheel type slim, according to the features of claim 1.
  • the grinding wheel according to the invention can be made from abrasive grains perfectly suited to the function they must ensure even if the grinding wheel is made up of regions of functions different.
  • the invention also relates to a method for manufacturing a abrasive wheel as defined above, characterized in that, for manufacture at least one layer of abrasive grains, on the one hand, a wafer possibly having a central hole, and consisting of grains abrasives of a first type, and on the other hand at least one crown made up abrasive grains of a second type, the inner contour of the crown and the outer contour of the wafer being geometrically similar, then to make the grinding wheel, we put the crown and the wafer in relation optional insertion on a reinforcement layer possibly another layer of reinforcement on the wafer and the crown in insertion relationship, and in a later stage of the manufacturing process presses the stack of constituent layers.
  • the grinding wheel according to the invention shown in Figure 1, of the type thin grinding wheel comprises, threaded around a central metal ring 11, layers of stacked constituents, and more precisely a disc of protection 12 generally consisting of a sheet of paper or the like, said "Paper”, a reinforcing layer 13 called “fabric” and which can actually be fabric, or preferably a mesh, perforated or honeycomb material, a layer of abrasive grains 14, another reinforcing layer 15 generally identical to the first, and possibly another protective disc says "Paper”.
  • the manufacture of such a grinding wheel comprising a phase of pressing, the layer of abrasive grains 14 and the reinforcing layers 13, 15 mesh, perforated or dimpled are generally at least partially nested as a result of the penetration of the abrasive grains constituting the layer 14, in the stitches, perforations or cells.
  • the abrasive grain layer 14 has regions juxtaposed, here two concentric regions 14A, 14B, formed from abrasive grains of different characteristics, one of these regions extending in the vicinity of the central ring 11 while the other region surrounds the first and extends along the outer periphery of the layer of abrasive grains.
  • the joint line between regions 14A, 14B made up of abrasives different is a closed line that extends here in circumference centered on the axis of the central ring 11.
  • the grinding wheel according to the invention can also comprise several layers made from abrasive grains such as the grain layer abrasives 14, stacked successively, each time with the insertion of a reinforcing layer called "fabric" between two layers of abrasive grains.
  • abrasive grains such as the grain layer abrasives 14, stacked successively, each time with the insertion of a reinforcing layer called "fabric" between two layers of abrasive grains.
  • we manufacture the grinding wheels according to the invention by replacing the removal of the pulverulent products formed from abrasive grains comprising a coating, by depositing a cake abrasive itself manufactured as will be seen hereinafter from such abrasive grains and, for the abrasive layer (s) with two regions concentric, by removing an abrasive pad and crown manufactured in the same way as we put an insertion relation, in eliminating the scraping phase, and continuing the process by superimposing a reinforcing layer on the wafer and the crown in relation insertion.
  • the abrasive pad and ring can be made using a method and a machine such as those described in detail in patent document FR 99 07 282 of the applicant, which allow to make wafers and crowns without the inconvenience mentioned above and in particular remarkably well balanced.
  • the wafer making machine has a table of rotary manufacturing step by step of generally circular shape comprising by example four sectors equipped with molds, and fixed work stations specialized to perform the different tasks respectively or manufacturing operations on the contents of the molds when they pass in front of them; thus, several patties can be simultaneously in manufacturing course on the table.
  • the machine also has a table rotary storage on which the patties made on the table manufacturing are aligned or / and stacked before being removed to be transferred to an assembly line.
  • the stations that equip the machine are a dumping station abrasive product consisting of abrasive grains comprising a coating consisting of a binder, a scraping equalization station, a pressing, a wafer unloading station, and a cleaning station of the table.
  • the molds ( Figures 3 and 4), of generally cylindrical shape, have a side wall 16 inside which is mounted a bottom sliding 17 suitable for sliding in vertical direction, provided with a core central 18
  • the abrasive dumping station is provided at its upper part an abrasive product tank; at its bottom, the post of spill has a closable slot so the product can be poured into the mold when it is positioned under the slot, the bottom of the mold being positioned inside the side wall at a depth greater than the desired thickness for the cake.
  • a scraper equalization 19 scrapes the product flush with the side wall 16 of the mold.
  • the pressing station compresses the product by force of the order of a few tonnes (or tens of thousands of newtons), forming then the cake intended to be introduced into an assembly line which will be described below.
  • the unloading station transfers the pancakes from the table manufacturing at the storage table.
  • the cleaning station cleans the table area which passes opposite, downstream of the unloading station.
  • each of the four sectors of the table is equipped with a single mold, we have almost or simultaneously a mold being filled, a mold being scraped, a pancake being pressing, and a cake being unloaded from the table manufacturing.
  • the crown making machine can be the same as the wafer making machine, in the shape and dimensions of the molds close ( Figures 5 and 6); thus, the molds, of generally cylindrical shape, have a side wall 16 'inside which is mounted a bottom sliding 17 'suitable for sliding in vertical direction, provided with a core central 18 '.
  • the tools of the stations being not very complex, can in the event of a change in manufacture or a breakdown, be exchanged very quickly;
  • the dimensions of the grinding wheels can be chosen so that a wafer of given dimensions can enter into the manufacture of a wheel with a single type of abrasive grains of relatively small diameter, and serve as a central cake in a grinding wheel larger diameter to two types of abrasive grains; for example, a 75 mm wafer can be used to form the central region of a 125 mm grinding wheel with two types of abrasive grains.
  • the rotary table is relatively small (the diameter can be reduced to a value less than one meter), and the molds which are used only for the production of wafers and crowns, are light weight (less than 15 kg).
  • the pressing force to be exerted on the abrasive product to making the patties and the crowns one by one is relatively moderate, of the order of a few tonnes (or tens of thousands of newtons), during about a second.
  • the assembly line illustrated by the diagram in Figure 7 is intended for the manufacture of grinding wheels with a single layer of abrasive grains, therefore comprising here a cake and a crown.
  • This conveyor comprises a conveyor 20 progressing in a closed circuit, the along which are specialized fixed work stations for perform respectively the different operations of manufacturing the grinding wheel proper.
  • This conveyor carries trays fixed on it, suitable for receive removable trays 201 on which, as and when scrolling of the conveyor, the different elements are stacked one on the other and in particular the different layers of constituents of the grinding wheels.
  • the assembly line comprises in succession in the direction of travel of the conveyor 20, a ring fitting station central 21, a basic "paper” installation station 22, a basic installation station lower reinforcement layer 23, a wafer laying station 24, a laying of crown 25, a station for laying an upper reinforcing layer 26, possibly a top “paper” installation station (not shown), here a heating station 27, and an unloading and recharging station 28.
  • Each work station intended to superimpose a layer of constituent has a stock of batteries each carried by a tray removable 201, and thus a short-term interruption of the operation of one of the stations, for example due to a breakdown, does not completely interrupt the manufacture of grinding wheels, the workstations located downstream working on their stock, and upstream stations that can be ordered to increase the their Here we therefore advantageously obtain a desynchronization of manufacturing operations
  • the heating station 27 provided here heats the batteries P which run at a temperature of about 50 to 80 ° C which facilitates a slight flow of the abrasive product constituting the wafers in the holes of the reinforcement layer, for example mesh in the case of real fabric or similar.
  • the assembly line has a certain modularity and increasing the number of layers can be done by simply adding the appropriate number of positions; for example, to make grinding wheels two layers of abrasive grains, just add to the assembly line which has just been described, a wafer installation station, a crown, and a reinforcement layer installation station.
  • the laying stations can be automated or manuals.
  • the installation includes a pressing machine 29 in which the removable plates with their contents, leaving the heating station 27, are transferred by the unloading and reloading 28; alternatively, this machine pressing could be part of the assembly line.
  • the pressing machine 29 is similar to that of the applicant's patent document FR 99 07 282. As the abrasive products are already in the form of wafers and crowns, the duration of the pressing step is relatively short, and since each press works only on a stack, the pressing force can remain relatively moderate (of the order 20 tonnes, i.e. approximately 2.10 5 N).
  • the discs discharged from the pressing machine 29 are then, in known manner, transferred to another oven to undergo a annealed before being stored for delivery.
  • the invention is not limited to the above examples described and represented, and others can be provided without departing from its frame, for example making grinding wheels with two types of abrasive grains (or more) one or more juxtaposed regions have openings for example made during molding.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
EP01907613A 2000-01-17 2001-01-17 Meule abrasive et procede de fabrication d'une telle meule Expired - Lifetime EP1248696B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0000536 2000-01-17
FR0000536A FR2803786B1 (fr) 2000-01-17 2000-01-17 Meule abrasive et procede de fabrication d'une telle meule
PCT/FR2001/000146 WO2001053041A1 (fr) 2000-01-17 2001-01-17 Meule abrasive et procede de fabrication d'une telle meule

Publications (2)

Publication Number Publication Date
EP1248696A1 EP1248696A1 (fr) 2002-10-16
EP1248696B1 true EP1248696B1 (fr) 2004-07-21

Family

ID=8845979

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01907613A Expired - Lifetime EP1248696B1 (fr) 2000-01-17 2001-01-17 Meule abrasive et procede de fabrication d'une telle meule

Country Status (10)

Country Link
US (1) US6840850B2 (cs)
EP (1) EP1248696B1 (cs)
KR (1) KR100774492B1 (cs)
AU (1) AU2001235535A1 (cs)
CZ (1) CZ304244B6 (cs)
DE (1) DE60104393T2 (cs)
ES (1) ES2225483T3 (cs)
FR (1) FR2803786B1 (cs)
PL (1) PL204875B1 (cs)
WO (1) WO2001053041A1 (cs)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003049903A1 (fr) * 2001-12-13 2003-06-19 Nikon Corporation Meule et procede de fabrication correspondant pour element optique
AT502285B1 (de) * 2004-10-19 2008-12-15 Gissing Gerhard Trennschleifring mit doppelter kernspannvorrichtung
RU2349446C1 (ru) * 2007-07-30 2009-03-20 Виталий Александрович Коротков Способ изготовления шлифовальных кругов повышенной прочности на бакелитовой связке
KR100888270B1 (ko) * 2007-11-19 2009-03-10 (주)디앤디 디스크산업 커팅 휠 제조용 지그
RU2369474C1 (ru) * 2008-02-11 2009-10-10 Виталий Александрович Коротков Способ изготовления шлифовальных инструментов с ориентированными зернами
DE102010020601B4 (de) * 2010-05-14 2013-01-24 Saint-Gobain Diamantwerkzeuge Gmbh & Co. Kg Schleifscheibe
DE102011112412A1 (de) * 2011-09-06 2013-03-07 Rhodius Schleifwerkzeuge Gmbh & Co. Kg Harzgebundene Trennscheibe
US9321184B2 (en) * 2013-05-09 2016-04-26 Lawrence E Baker Blade sharpening system for a log saw machine
US11059148B2 (en) 2016-09-09 2021-07-13 Saint-Gobain Abrasives, Inc. Abrasive articles having a plurality of portions and methods for forming same
CN108177096B (zh) * 2018-02-05 2022-03-22 鹤山市飞鹭磨料有限公司 一种砂布轮的加工工艺

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1616531A (en) * 1922-08-08 1927-02-08 Norton Co Cutting-off abrasive wheel

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL42790C (cs) * 1935-02-14
US2910810A (en) * 1958-04-02 1959-11-03 Wagner & Englert G M B H Grinding wheel
GB1540511A (en) * 1976-06-17 1979-02-14 Norton Co Composite abrasive cut-off wheel
GB1591491A (en) * 1977-01-18 1981-06-24 Daichiku Co Ltd Laminated rotary grinder and method of fabrication
CS206358B1 (cs) * 1979-11-13 1981-06-30 Petr Keller Brusný kotouč
CH676942A5 (cs) * 1988-08-24 1991-03-28 Fritz Studer Maschinenfabrik A
JPH06312377A (ja) * 1993-04-28 1994-11-08 Hiroshi Akita 切断用砥石およびその製造方法
JP3028320B2 (ja) * 1995-04-19 2000-04-04 矢野 和也 切断砥石車とその製造法

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1616531A (en) * 1922-08-08 1927-02-08 Norton Co Cutting-off abrasive wheel

Also Published As

Publication number Publication date
FR2803786A1 (fr) 2001-07-20
KR20020079775A (ko) 2002-10-19
WO2001053041A1 (fr) 2001-07-26
PL356581A1 (en) 2004-06-28
ES2225483T3 (es) 2005-03-16
PL204875B1 (pl) 2010-02-26
FR2803786B1 (fr) 2002-03-08
EP1248696A1 (fr) 2002-10-16
US6840850B2 (en) 2005-01-11
CZ20022485A3 (cs) 2002-11-13
US20030162488A1 (en) 2003-08-28
DE60104393T2 (de) 2005-08-25
DE60104393D1 (de) 2004-08-26
KR100774492B1 (ko) 2007-11-08
CZ304244B6 (cs) 2014-01-29
AU2001235535A1 (en) 2001-07-31

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