EP0865879A2 - Schleifscheibe und Verfahren zum Herstellen derselben - Google Patents

Schleifscheibe und Verfahren zum Herstellen derselben Download PDF

Info

Publication number
EP0865879A2
EP0865879A2 EP98870032A EP98870032A EP0865879A2 EP 0865879 A2 EP0865879 A2 EP 0865879A2 EP 98870032 A EP98870032 A EP 98870032A EP 98870032 A EP98870032 A EP 98870032A EP 0865879 A2 EP0865879 A2 EP 0865879A2
Authority
EP
European Patent Office
Prior art keywords
disc
abrasive
segments
grinding
shape
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.)
Granted
Application number
EP98870032A
Other languages
English (en)
French (fr)
Other versions
EP0865879B1 (de
EP0865879A3 (de
Inventor
Jean-Pierre Chevalier
François Boland
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.)
Sa Carbodiam
Original Assignee
Sa Carbodiam
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=3890361&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0865879(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Sa Carbodiam filed Critical Sa Carbodiam
Publication of EP0865879A2 publication Critical patent/EP0865879A2/de
Publication of EP0865879A3 publication Critical patent/EP0865879A3/de
Application granted granted Critical
Publication of EP0865879B1 publication Critical patent/EP0865879B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
    • B24D7/10—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor with cooling provisions
    • 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
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor

Definitions

  • the present invention relates to an abrasive disc for grinding of materials, comprising a support provided with segments comprising an abrasive material and a binder coating.
  • abrasive particles alumina oxide, carbide silicon .
  • grinding wheels made up of grain segments of diamond set in a coating binder associated with a support metallic by welding, soldering or mechanical attachment or still grinding wheels obtained by direct sintering of the binder coating crimping the diamond grains on the body tool metal. Many uses of these tools have place under abundant watering which has the merit of cooling the tool and to remove the ground material.
  • Suction or blowing devices are intended for this purpose but do not always perform their function.
  • Diamond grinding abrasive discs have been developed for portable machines powered by a operator. These tools generally have the form of a disc and consist of a support having an area crown-shaped device, a median shaped area conical, and a disc-shaped interior area. Of abrasive segments, shaped like a crown sector, are fixed on the periphery of the peripheral zone. These segments can be arranged in a single row in the form of circle, or on two or more concentric rows. Of openings in the support allow to force air circulation to cool the segments abrasives during work, and take away the chips and grinding dust.
  • Discs with two or more rows of segments allow better support of the grinding tool, and lead to more regular grinding work.
  • These tools have the disadvantage that due to baffles imposed on the air circulation, the cooling and removal of shavings and dust from grinding are difficult to perform.
  • the invention aims to remedy in a simple way and effective at the disadvantages mentioned above.
  • the subject of the invention is an abrasive grinding disc consisting of a support comprising a peripheral zone in crown shape, a conical middle area and a central disc-shaped area.
  • the peripheral zone is provided with abrasive segments. Openings allowing air intake or air supply is provided in this peripheral zone.
  • the abrasive segments essentially have a "L" shape or circumflex accent, and have a wing extending substantially along the periphery of the disc, and a wing extending substantially from the periphery towards the center of the disc.
  • the so-called "L" shaped segments or circumflex accent can present a wide range of shapes, curvatures and widths, without departing from the scope of the invention.
  • the abrasive segments have the shape of a dawn, and the profile of this dawn is determined so that when the disc is spinning, the air sucked or blown flows with an absolute speed according to the spokes of the disc, thus facilitating the circulation of this air.
  • the abrasive segments have advantageously a profile in the form of a parabolic spiral.
  • the abrasive segments can include diamond grains and a coating binder.
  • Figure 1 shows a grinding disc 2 according to the prior art, consisting of a support comprising a peripheral zone in the shape of a crown 4, a zone conical median 6, and an interior shaped area 8. These three areas are centered around the same axis.
  • Abrasive segments 10, in the form of a sector of crown, are arranged on the face of the peripheral zone in the shape of a crown 4, at its periphery. Openings of air passage 12 are formed through the support. These 12 openings can be made in the middle area of conical shape 6. Forced air circulation is established at through these openings 12, and makes it possible to cool the abrasive segments 10 and take away the chips and dust from grinding.
  • abrasive segments 10 In the variant of a grinding disc according to art anterior 2, shown in Figs. 4, 5 and 6, we have arranged the abrasive segments 10 on two concentric circles. The operator can support his machine more horizontal, and the risk of creating the grooves 16 is reduced. However, in this variant, the air used to cool the abrasive segments 10 and for removing the chips and the dust must travel a path with many baffles, shown in FIG. 4 by arrows B. We must then either use ventilation power important, or be satisfied with a cooling of the segments 10 and a dust and chip evacuation mediocre.
  • Fig. 7 shows a grinding disc 18 according to the invention, seen from the front. Identical elements are numbered in the same way as in Figs. 1 and 4.
  • the abrasive segments 20 have an "L" or accent shape circumflex, and have a wing 22 extending substantially along the periphery of the disc 18, and a wing 24 extending substantially from the periphery towards the center of the disc, degressively. This provision makes it possible to obtain that any circle in the peripheral zone has material abrasive, while having a more active surface area important around the edge of the disc 18.
  • These segments 20 therefore present a minimal obstacle to the circulation of the air.
  • Other combinations of air flow direction, the direction of rotation of the grinding disc 18 and the shape blades provide the same result.
  • the same effect can be achieved, for example, with the shape of segments 20 of FIG. 9, the air being blown in by the openings 12, i.e. circulating from the center of the disc 18 towards its periphery, and the disc 18 rotating in the direction of the arrow T.
  • the shape of the segments 20 according to the invention therefore has the advantage of facilitate air circulation. It also presents the advantageous characteristic that the active surface, i.e. the contact surface between the segments 20 and the grinding surface grows from inside the disc 18 towards its periphery. This results in more grinding work regular.
  • Fig. 8 is a perspective view of a disc grinding 18 according to the invention. It highlights the shape of the support comprising a peripheral zone 4 and a inner zone 8, located in offset parallel planes, and connected by a conical median zone 6, and taking thus the shape of a flattened bell.
  • Fig. 9 schematically illustrates the method of determining the shape to be given to an abrasive segment 20 in order to optimize the circulation of the air blown through the openings 12.
  • the air travels through the peripheral zone from a circular zone delimited by R a and an exit zone bounded by R c .
  • V a the absolute speed
  • V r the relative speed
  • V e the speed of drive
  • the drive speed V e is imposed by the rotation of the disc 18. If we want the absolute speed V a to be directed radially, we can build the relative speed V r . The curvature of the abrasive segment 20 is then directed along V r . It is thus possible to construct the optimal shape of an abrasive segment 20 respecting aerodynamic constraints.
  • segment 20 is therefore that of a parabolic spiral.
  • a very significant improvement in air circulation can be obtained by means of segments 20 whose shape approximates that guided by the above theory, without having to be identical to the theoretical shape.
  • the active grinding surface is distributed evenly between the inner radius R a and the outer radius R b , and is maximum at the periphery, where it is required.
  • the abrasive segments according to the invention allow a substantial improvement in the quality of the ground surface obtained, in the ease of handling of the tool by the operator, and in the longevity of the tool, thanks to better ventilation and better elimination of grinding chips and dust.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
EP19980870032 1997-02-21 1998-02-19 Schleifscheibe und Verfahren zum Herstellen derselben Expired - Lifetime EP0865879B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE9700162A BE1011027A6 (fr) 1997-02-21 1997-02-21 Outil abrasif de meulage et methode de conception de cet outil.
BE9700162 1997-02-21

Publications (3)

Publication Number Publication Date
EP0865879A2 true EP0865879A2 (de) 1998-09-23
EP0865879A3 EP0865879A3 (de) 1999-02-03
EP0865879B1 EP0865879B1 (de) 2001-10-10

Family

ID=3890361

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19980870032 Expired - Lifetime EP0865879B1 (de) 1997-02-21 1998-02-19 Schleifscheibe und Verfahren zum Herstellen derselben

Country Status (4)

Country Link
EP (1) EP0865879B1 (de)
BE (1) BE1011027A6 (de)
DE (2) DE865879T1 (de)
ES (1) ES2163248T3 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1074347A2 (de) * 1999-07-29 2001-02-07 Ehwa Diamond Ind. Co., Ltd. Schleifscheibe mit Staubausstoss Antriebsflügeln
EP1304190A1 (de) * 2001-10-19 2003-04-23 Carbodiam S.A. Schneidwerkzeug zum Entfernen von èberzügen auf mineralischen Substraten

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008046947A1 (de) * 2008-09-12 2010-03-18 Protool Gmbh Hand-Werkzeugmaschine mit einer Abdeckhaube und einem Staubabfuhranschluss
DE102019211349A1 (de) * 2019-07-30 2021-02-04 Robert Bosch Gmbh Schleifwerkzeug

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58192759A (ja) * 1982-04-27 1983-11-10 Masayuki Oka 空冷装置付き砥石
EP0535431A1 (de) * 1991-09-27 1993-04-07 Tyrolit Schleifmittelwerke Swarovski KG Winkelschleifmaschine
US5514027A (en) * 1994-04-22 1996-05-07 Pearl Abrasive Co. Sanding head for a sanding machine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58192759A (ja) * 1982-04-27 1983-11-10 Masayuki Oka 空冷装置付き砥石
EP0535431A1 (de) * 1991-09-27 1993-04-07 Tyrolit Schleifmittelwerke Swarovski KG Winkelschleifmaschine
US5514027A (en) * 1994-04-22 1996-05-07 Pearl Abrasive Co. Sanding head for a sanding machine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 008, no. 037 (M-277), 17 février 1984 & JP 58 192759 A (MASAYUKI OKA), 10 novembre 1983 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1074347A2 (de) * 1999-07-29 2001-02-07 Ehwa Diamond Ind. Co., Ltd. Schleifscheibe mit Staubausstoss Antriebsflügeln
EP1074347A3 (de) * 1999-07-29 2003-10-08 Ehwa Diamond Ind. Co., Ltd. Schleifscheibe mit Staubausstoss-Antriebsflügeln
EP1304190A1 (de) * 2001-10-19 2003-04-23 Carbodiam S.A. Schneidwerkzeug zum Entfernen von èberzügen auf mineralischen Substraten
BE1014434A3 (fr) * 2001-10-19 2003-10-07 Carbodiam Methode de conception et de fabrication d'outil de coupe destine a l'enlevement de revetements sur substrats mineraux.

Also Published As

Publication number Publication date
EP0865879B1 (de) 2001-10-10
EP0865879A3 (de) 1999-02-03
ES2163248T3 (es) 2002-01-16
DE69801943D1 (de) 2001-11-15
DE69801943T2 (de) 2002-05-16
BE1011027A6 (fr) 1999-04-06
DE865879T1 (de) 1999-04-22

Similar Documents

Publication Publication Date Title
KR100314287B1 (ko) 연마 휠
US5609516A (en) Rotating abrader with polygonal pad and dust evacuation
EP0826461B1 (de) Schleifscheibe mit eingebauter Kühleinrichtung
US6217433B1 (en) Grinding device and method
EP1257365B1 (de) Vorrichtung zum spritzen von beschichtungsmitteln und rotierendes zerstäubungselement für diese vorrichtung
JPH10264042A (ja) 研磨ディスク
FR2527727A1 (fr) Poulie pour courroie et procede de fabrication de celle-ci
CN101437651A (zh) 切割工具磨具
US6966826B2 (en) Grinding wheel
FR2909018A1 (fr) Perfectionnement aux outils d'usinage rotatifs, en particulier de type outils rotatifs coupants.
CH619884A5 (en) Disc-shaped plate for a sanding machine with suction
EP0865879B1 (de) Schleifscheibe und Verfahren zum Herstellen derselben
JP2009515715A (ja) カッティングディスク
FR2798610A1 (fr) Ponceuse a main, notamment ponceuse orbitale
US5468178A (en) Rotary device for removing paint from a surface
EP0823555B1 (de) Kreiselventilationsgerät mit verbesserter Leistung mit wenigstens zwei Saugöffnungen und Ventilationsverfahren
JPH0938866A (ja) カップ状砥石
FR2701417A1 (fr) Outil abrasif rotatif comportant des moyens de refroidissement.
EP2992998A1 (de) Drehscheibe mit abnehmbaren schleifsegmenten
JP2011218465A (ja) 研削装置
FR2574000A1 (fr) Concasseur pour broyer des roches ou materiaux similaires
EP1419854B1 (de) Kontrollstück und Verteiler zur Materialzuführung zur Sandstrahlanlage mit Schleuderrad und dessen Anwendung
WO2023194596A1 (fr) Dispositif de ventilation pour meule abrasive et meule abrasive comprenant un tel dispositif de ventilation
JPH0611964U (ja) 砥石盤
FR2666533A1 (fr) Disque abrasif performant.

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): BE CH DE ES FR GB LI NL PT

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

DET De: translation of patent claims
17P Request for examination filed

Effective date: 19990802

AKX Designation fees paid

Free format text: AT BE CH DE DK ES LI

RBV Designated contracting states (corrected)

Designated state(s): AT BE CH DE DK ES FR GB LI NL PT

17Q First examination report despatched

Effective date: 20000127

RBV Designated contracting states (corrected)

Designated state(s): BE CH DE ES FR GB LI NL PT

RBV Designated contracting states (corrected)

Designated state(s): BE CH DE ES FR GB LI NL PT

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE CH DE ES FR GB LI NL PT

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 69801943

Country of ref document: DE

Date of ref document: 20011115

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: A. BRAUN, BRAUN, HERITIER, ESCHMANN AG PATENTANWAE

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20020110

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20011220

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2163248

Country of ref document: ES

Kind code of ref document: T3

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: CH

Ref legal event code: PFA

Owner name: S.A. CARBODIAM

Free format text: S.A. CARBODIAM#RUE GENERAL MELLIER 27#1495 TILLY (BE) -TRANSFER TO- S.A. CARBODIAM#RUE GENERAL MELLIER 27#1495 TILLY (BE)

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20090225

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20090218

Year of fee payment: 12

Ref country code: DE

Payment date: 20090211

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20090216

Year of fee payment: 12

Ref country code: CH

Payment date: 20090213

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20090213

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20090130

Year of fee payment: 12

BERE Be: lapsed

Owner name: S.A. *CARBODIAM

Effective date: 20100228

REG Reference to a national code

Ref country code: NL

Ref legal event code: V1

Effective date: 20100901

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20100219

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100228

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100228

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20101029

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100901

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100301

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100901

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100228

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100219

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20110408

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110324

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100220