EP2480376B1 - Machine de meulage à disques multiples, en particulier pour travailler la pierre et les matériaux similaires - Google Patents
Machine de meulage à disques multiples, en particulier pour travailler la pierre et les matériaux similaires Download PDFInfo
- Publication number
- EP2480376B1 EP2480376B1 EP10763152.5A EP10763152A EP2480376B1 EP 2480376 B1 EP2480376 B1 EP 2480376B1 EP 10763152 A EP10763152 A EP 10763152A EP 2480376 B1 EP2480376 B1 EP 2480376B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- disc
- discs
- abrasive
- shaft
- driving shaft
- 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.)
- Active
Links
- 238000000227 grinding Methods 0.000 title claims description 19
- 239000000463 material Substances 0.000 title description 6
- 239000004575 stone Substances 0.000 title description 3
- 239000012530 fluid Substances 0.000 claims description 24
- 239000002826 coolant Substances 0.000 claims description 14
- 238000005520 cutting process Methods 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 238000001816 cooling Methods 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
Images
Classifications
-
- 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
- B24D5/06—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor with inserted abrasive blocks, e.g. segmental
- B24D5/066—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor with inserted abrasive blocks, e.g. segmental with segments mounted axially one against the other
-
- 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
- B24D5/10—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor with cooling provisions, e.g. with radial slots
Definitions
- the present invention relates to a machine having the features set out in the preamble of claim 1.
- the invention is for use in particular in the sector of the processing of stone and like materials, in which use is made of multiple disc grinding machines having a plurality of cutting discs with abrasive segments combined in a pack on a shaft which may be caused to rotate.
- multiple disc grinding machines of the above-mentioned type use is typically made of coolant fluids which are conveyed to the processing zones to ensure that the heat generated by processing, following contact between the abrasive sectors and the surfaces of the workpiece, is adequately dissipated.
- the shaft is provided with an internal hole in order to convey the fluid to a distributor member, for instance a bushing interposed between the shaft and the discs and designed to collect the fluid and distribute it to the exterior of the discs in the processing zones.
- This solution nevertheless requires the provision of a specific distributor member which has to be mounted when the cutting discs are being mounted on the multiple disc grinding machine.
- a main object of the invention is to provide an abrasive disc for multiple disc grinding machines designed to provide a coolant distribution system which is structurally simpler and easier to use, but which continues to provide efficient cooling of the tool.
- an abrasive disc for a multiple disc grinding machine embodied in accordance with the present invention is shown overall by 1.
- a grinding machine equipped with a plurality of abrasive discs closed in a pack on a driving shaft 3 of the grinding machine which may be caused to rotate about an axis X is shown by 2. Only the cutting disc 1 will be described in detail below, as the features described mirror those of the remaining discs of the pack mounted on the shaft 3.
- the multiple disc grinding machine designed in this way is for particular use for the processing of stone and like materials but could be used in other fields, for instance for the processing of ceramics, refractory materials or glass.
- the disc 1 comprises a disc-shaped support 1a which is axially symmetrical with a main axis shown by Y in the drawings and bears a circumferential rim 4 on which abrasive cutting sectors 5 are applied.
- the transverse thickness of the disc at its central portion, measured parallel to the axis Y, is shown by 6.
- the support 1a is also provided with a central hole 7 for connection to an end portion of the driving shaft 3 which causes the disc to rotate during cutting operations involving tangential contact between the rim 4 and the material to be processed.
- connection hole 7 has a first cylindrical through section 7a which comes into coupling contact with the driving shaft 3 and a second cylindrical through section 7b extending as an axial continuation of the first section, this second section having a diameter greater than the first section.
- annular chamber shown by 8 is formed at the location of the second through section 7b, following connection with the shaft 3, whose function will be explained in detail in the following description.
- the sequence of through holes 7a, 7b extends through the entire transverse thickness 6 of the disc, so that the section 7b extends, with its free end, up to the location of a front transverse surface of the disc shown by 9. This surface extends with an annular configuration from the hole 7 in the direction of the rim 4 over a predetermined radial development.
- each disc When the discs are mounted as a pack on the shaft 3, the surface 9 of each disc abuts against the adjacent disc and as a result of the axial clamping action of the pack of discs, this surface acts as a friction member designed to prevent the relative sliding of adjacent discs.
- the front surface 9 is provided with at least one radial recess, shown by 10, which extends from the annular chamber 8 in the direction of the rim 4 radially including the whole surface.
- a preferred choice, shown in the appended drawings, is to provide three recesses 10 angularly spaced from one another at regular intervals (with an angular pitch of 120°), although the invention could function with other configurations.
- the recesses 10 may also be readily provided on the front surface 9 by respective radial milling operations on the surface 9. As is clearly shown in Fig.
- the annular chamber 8 is connected in fluid communication with each of the recesses 10 so as to ensure a passage for a coolant fluid accumulated in the chamber and conveyed to the exterior of the disc via the recess 10.
- the driving shaft of the grinding machine 2 is provided with an internal axial duct 11 for supplying the coolant fluid, which duct is continued by one or a plurality of radial end ducts 12 opening at the location of cylindrical shell of the end portion of the shaft 3 designed to house the abrasive discs.
- the thickness 6 of the disc 1 in contact with the shaft is smaller than the diameter of the hole 12 provided on the shaft, so as to ensure a passage for the coolant fluid from the chamber 8 containing the fluid to the recesses 10, which recesses 10 therefore form a kind of channel for supplying the fluid to the exterior of the disc in order to distribute the fluid to the processing zones close to the abrasive sectors of the circumferential rim 4.
- annular chamber 8 in fluid connection with the recesses 10 therefore makes it possible for the coolant fluid to be accumulated in the chamber and then to flow radially, under the centrifugal effect of the rotation of the grinding machine, along the recesses so as efficiently to reach the processing zone of the abrasive sectors of the discs and thus to ensure the cooling of the surfaces in relative contact of the discs and the material being processed.
- the cylindrical shell of the driving shaft 3 intended to receive the cutting discs may be provided with a groove 13 (or a plurality of grooves 13) extending axially along the whole pack of discs and in fluid communication with the supply holes 12 of the coolant fluid.
- This groove may improve the distribution effect of the coolant fluid to each annular chamber of the discs mounted in a pack on the shaft, as shown in Fig. 3 , in the lower axial section of the grinding machine.
- the invention thus achieves the objects set out above and provides many advantages over known solutions.
- a main advantage lies in the simpler structure and operation of the cooling system which the invention applies to multiple disc cooling systems, avoiding the use of specific distribution members for the coolant fluid, such as the bushings or like distributors for which known solutions make provision.
- This simpler structure is advantageously reflected by easier use, especially as regards operations to mount the pack of discs on the grinding machine and remove it therefrom, a major advantage when taking account of the fact that these tools have to be readily and rapidly interchangeable as a result of the wear of the abrasive profiles to which they are subject when processing materials.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Polishing Bodies And Polishing Tools (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
Claims (2)
- Machine de meulage à disques multiples comprenant- un arbre d'entraînement (3),- une pluralité de disques abrasifs (1) combinés dans un empilement sur ledit arbre (3), chacun desdits disques comprenant un support discoïde (1a) comportant une bordure circonférentielle (4) sur laquelle des secteurs de coupe abrasifs (5) sont appliqués et un trou central opposé (7) pour l'ajustement sur l'arbre d'entraînement (3) de la machine de meulage, ledit trou (7) s'étendant sur toute l'épaisseur du support discoïde (1a), et le trou (7) comporte une première section traversante cylindrique (7a) qui vient en contact d'accouplement avec l'arbre d'entraînement (3),- au moins un évidement radial (10) est formé sur une surface avant (9) du support discoïde (1a),- l'arbre d'entraînement (3) est doté d'un conduit axial interne (11) pour l'alimentation en fluide de refroidissement, ledit conduit (11) étant prolongé par au moins un trou radial d'extrémité (12) débouchant à l'endroit de l'enveloppe cylindrique de la partie d'extrémité de l'arbre (3) conçu pour accueillir les disques abrasifs, l'épaisseur (6) du disque (1) en contact avec l'arbre (3) et le trou radial d'extrémité (12) étant inférieure au diamètre du trou radial d'extrémité (12) prévu sur l'arbre ;la machine étant caractérisée en ce que- une partie dudit trou central (7) a un diamètre supérieur au diamètre du raccordement audit arbre (3), de telle manière qu'une chambre annulaire (8) est formée dans l'épaisseur du support, et dans laquelle- le trou central (7) comporte une seconde section traversante cylindrique (7b) s'étendant sous la forme d'un prolongement axial de la première section (7a), ladite seconde section (7b) ayant le diamètre supérieur à la première section (7a), de telle manière que ladite chambre annulaire (8) est formée à l'endroit de la seconde section traversante (7b), après le raccordement à l'arbre (3),- l'au moins un évidement radial (10) s'étend à partir de ladite chambre annulaire (8) vers la bordure circonférentielle (4) dudit disque, d'une manière telle qu'un fluide de refroidissement introduit dans l'arbre d'entraînement (3) peut s'accumuler dans ladite chambre annulaire (8) et peut ensuite s'écouler à travers ledit évidement radial (10) vers le bord abrasif dudit disque, et
dans laquelle- la surface avant (9) de chacun desdits disques abrasifs dans ledit empilement vient en butée contre une surface correspondante du disque abrasif adjacent, et dans laquelle l'action de serrage axial de l'empilement des disques abrasifs amène lesdites surfaces à agir comme des éléments de frottement qui empêchent le glissement relatif de certains adjacents parmi les disques abrasifs, et dans laquelleun passage pour le fluide de refroidissement de la chambre (8) contenant le fluide aux évidements (10) est assuré, lesdits évidements (10) formant ainsi une sorte de canal pour l'alimentation en fluide à l'extérieur du disque afin de distribuer le fluide dans les zones de traitement près des secteurs abrasifs (5) de la bordure circonférentielle (4). - Machine de meulage à disques multiples selon la revendication 1, dans laquelle l'arbre d'entraînement inclut au moins une rainure (13) s'étendant axialement dans l'enveloppe cylindrique de l'extrémité de l'arbre d'entraînement destinée à être raccordée auxdits disques, ladite au moins une rainure (13) communiquant avec ledit trou radial d'extrémité (12) pour l'introduction de fluide de refroidissement et étant capable d'amener ledit trou radial d'extrémité (12) en communication avec la chambre annulaire (8) des disques correspondants (1), qui sont fixés dans un empilement sur l'arbre d'entraînement (3), la rainure (13) améliorant l'effet de distribution du fluide de refroidissement dans chaque chambre annulaire (8) des disques montés dans un empilement sur l'arbre d'entraînement.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL10763152T PL2480376T3 (pl) | 2009-09-25 | 2010-09-17 | Szlifierka wielotarczowa, w szczególności do obróbki kamienia i podobnych materiałów |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITPD2009A000280A IT1395952B1 (it) | 2009-09-25 | 2009-09-25 | Disco abrasivo per mola multi-disco, particolarmente per lavorazione di materiali lapidei ed affini e mola includente detto disco |
PCT/EP2010/063724 WO2011036104A1 (fr) | 2009-09-25 | 2010-09-17 | Disque abrasif pour machine de meulage à disques multiples, en particulier pour travailler la pierre et les matériaux similaires, et machine de meulage comprenant ledit disque |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2480376A1 EP2480376A1 (fr) | 2012-08-01 |
EP2480376B1 true EP2480376B1 (fr) | 2019-11-13 |
Family
ID=42140344
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10763152.5A Active EP2480376B1 (fr) | 2009-09-25 | 2010-09-17 | Machine de meulage à disques multiples, en particulier pour travailler la pierre et les matériaux similaires |
Country Status (8)
Country | Link |
---|---|
US (1) | US20120225615A1 (fr) |
EP (1) | EP2480376B1 (fr) |
AU (1) | AU2010299989A1 (fr) |
CA (1) | CA2710589C (fr) |
ES (1) | ES2771948T3 (fr) |
IT (1) | IT1395952B1 (fr) |
PL (1) | PL2480376T3 (fr) |
WO (1) | WO2011036104A1 (fr) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT201700013710A1 (it) * | 2017-02-08 | 2018-08-08 | Meccanotecnica Veneta S R L | Gruppo operativo per utensile rotativo a disco e metodo di realizzazione di un gruppo operativo |
IT201700013633A1 (it) * | 2017-02-08 | 2018-08-08 | Meccanotecnica Veneta S R L | Testa operativa per utensile rotativo a disco e metodo di realizzazione di una testa operativa |
CN112355918A (zh) * | 2020-10-20 | 2021-02-12 | 黄莉 | 一种砂轮结构及其加工工艺 |
CN112496758B (zh) * | 2020-11-11 | 2021-10-08 | 温州职业技术学院 | 一种机电自动化切磨一体机 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE730901C (de) * | 1933-11-28 | 1943-01-28 | Carl Krug Dr Ing | Umlaufendes Schleifwerkzeug |
US3156274A (en) * | 1961-07-27 | 1964-11-10 | Alexander J Golick | Mist lubricated ripsawing method and mechanisms |
JPS5387987U (fr) * | 1976-12-21 | 1978-07-19 |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2094650A (en) * | 1936-10-01 | 1937-10-05 | Elisha W Hall | Abrading or polishing tool |
US2581934A (en) * | 1949-04-04 | 1952-01-08 | Firestone Tire & Rubber Co | Abrading roll |
US3109190A (en) * | 1960-07-13 | 1963-11-05 | Osborn Mfg Co | Rotary brush with fluid channels |
US3324607A (en) * | 1964-08-13 | 1967-06-13 | Super Cut | Rotary grinding tool with interrupted abrasive helicoid |
US3376673A (en) * | 1964-09-08 | 1968-04-09 | Super Cut | Rotary cutter assembly for concrete leveler |
GB1591491A (en) * | 1977-01-18 | 1981-06-24 | Daichiku Co Ltd | Laminated rotary grinder and method of fabrication |
DE4243017A1 (de) * | 1992-12-18 | 1994-06-23 | Hilti Ag | Scheibenförmiges Schleifwerkzeug |
US6358133B1 (en) * | 1998-02-06 | 2002-03-19 | 3M Innovative Properties Company | Grinding wheel |
US20030073396A1 (en) * | 2001-10-15 | 2003-04-17 | Fang-Chun Yu | Diamond grinding wheel |
KR20040102965A (ko) * | 2003-05-30 | 2004-12-08 | 이화다이아몬드공업 주식회사 | 웨이브형 소우 블레이드 |
US20050064799A1 (en) * | 2003-09-24 | 2005-03-24 | Inland Diamond Products Company | Ophthalmic roughing wheel |
US7497153B2 (en) * | 2003-11-07 | 2009-03-03 | James Hardie International Finance B.V. | Cutting tool and method of use |
EP1681137B2 (fr) * | 2004-12-30 | 2010-11-10 | Niesi Mr.Giuseppe | Dispositif de meulage, son utilisation pour meuler des objets cylindriques, machine et procédé pour meuler des objets cylindriques |
ITMO20050005U1 (it) * | 2005-03-23 | 2006-09-21 | Giovanni Ficai | Mola da taglio perfezionata |
ITPD20080237A1 (it) * | 2008-07-31 | 2010-02-01 | Adi S P A | Mola, particolarmente per lavorazioni di molatura ad elevata velocit@ di avanzamento |
US8764519B2 (en) * | 2010-12-06 | 2014-07-01 | Komatsu Ntc Ltd. | Grinding wheel |
US9028300B2 (en) * | 2011-08-31 | 2015-05-12 | Ehwa Diamond Industrial Co., Ltd. | Grinding tool adapted to collect grinding particles |
-
2009
- 2009-09-25 IT ITPD2009A000280A patent/IT1395952B1/it active
-
2010
- 2010-07-20 CA CA2710589A patent/CA2710589C/fr active Active
- 2010-09-17 ES ES10763152T patent/ES2771948T3/es active Active
- 2010-09-17 PL PL10763152T patent/PL2480376T3/pl unknown
- 2010-09-17 AU AU2010299989A patent/AU2010299989A1/en not_active Abandoned
- 2010-09-17 US US13/497,940 patent/US20120225615A1/en not_active Abandoned
- 2010-09-17 EP EP10763152.5A patent/EP2480376B1/fr active Active
- 2010-09-17 WO PCT/EP2010/063724 patent/WO2011036104A1/fr active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE730901C (de) * | 1933-11-28 | 1943-01-28 | Carl Krug Dr Ing | Umlaufendes Schleifwerkzeug |
US3156274A (en) * | 1961-07-27 | 1964-11-10 | Alexander J Golick | Mist lubricated ripsawing method and mechanisms |
JPS5387987U (fr) * | 1976-12-21 | 1978-07-19 |
Also Published As
Publication number | Publication date |
---|---|
CA2710589A1 (fr) | 2010-10-22 |
PL2480376T3 (pl) | 2020-05-18 |
WO2011036104A1 (fr) | 2011-03-31 |
EP2480376A1 (fr) | 2012-08-01 |
AU2010299989A1 (en) | 2012-04-26 |
IT1395952B1 (it) | 2012-11-02 |
ES2771948T3 (es) | 2020-07-07 |
US20120225615A1 (en) | 2012-09-06 |
ITPD20090280A1 (it) | 2011-03-26 |
CA2710589C (fr) | 2013-09-24 |
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