EP0598389B1 - Bearing disc for diamond tools, suitable for damping vibrations - Google Patents

Bearing disc for diamond tools, suitable for damping vibrations Download PDF

Info

Publication number
EP0598389B1
EP0598389B1 EP93118503A EP93118503A EP0598389B1 EP 0598389 B1 EP0598389 B1 EP 0598389B1 EP 93118503 A EP93118503 A EP 93118503A EP 93118503 A EP93118503 A EP 93118503A EP 0598389 B1 EP0598389 B1 EP 0598389B1
Authority
EP
European Patent Office
Prior art keywords
cuts
disc
bearing disc
diamond tools
vibrations
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
EP93118503A
Other languages
German (de)
French (fr)
Other versions
EP0598389A1 (en
Inventor
Antonio Isinna
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.)
KARMAN DI INSINNA ANTONIO
Original Assignee
Individual
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
Application filed by Individual filed Critical Individual
Publication of EP0598389A1 publication Critical patent/EP0598389A1/en
Application granted granted Critical
Publication of EP0598389B1 publication Critical patent/EP0598389B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D61/00—Tools for sawing machines or sawing devices; Clamping devices for these tools
    • B23D61/02—Circular saw blades
    • B23D61/025—Details of saw blade body

Definitions

  • the present invention proposes a bearing disc for diamond tools according to the precharacterising part of claim 1 of the kind used for the manufacture of circular saws for cutting stone materials and the like in which cuts having a particular shape and position are provided, suitable for damping and/or preventing vibrations when the tool is used, see DE-U 76 01 953.
  • the disc is stiffened by tensioning it in the area comprised approximately between a third and two thirds of the diameter of the disc itself.
  • the present invention proposes a bearing disc for diamond tools in which there is provided a plurality of conveniently placed cuts, being able to damp or prevent this phenomenon.
  • the bearing is made up of a conveniently thick metal disc, indicated as a whole by 1, to which the diamond portions (not illustrated in the figure) are welded connected with the edge and which has an axial hole, indicated by 2, for applying the disc to the shaft of a machine which may be a saw for cutting stones or another apparatus known in the art.
  • a set of cuts suitable for damping both tangential and radial vibrations.
  • Both cuts 3 and cuts 4 in their end portion run curvilinearly, in particular they run on a line like a small semi-circumference.
  • Cuts 3 are staggered with respect to cuts 4, in the sense that a straight line passing through cuts 3 halves the area comprised between two external cuts 4.
  • Cuts 5 and 6 have the shape of a "Z" with the edges turned backwards and they are symmetric, in the sense that each cut 5 is the mirror-image of the corresponding cut 6, each pair of cuts 5 and 6 being placed between two consecutive external cuts 4.
  • the invention provides radial cuts near the outward diameter and the disc hub, one being staggered with another, and "Z"-shaped cuts, which are placed near the outward diameter.
  • the former have the function of damping tangential vibrations, whereas the latter damp both tangential and radial vibrations.
  • a bearing disc is thus obtained for diamond tools making the use of these tools much more practical and cheaper, being able to damp or eliminate vibrations almost completely.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Holding Or Fastening Of Disk On Rotational Shaft (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Abstract

A bearing disc for diamond tools, e.g. a circular saw blade, comprising a set of radial cuts, near the disc hub; a set of radial cuts, being staggered with respect to the former, near the outward edge; a set of Z-shaped cuts, approximately near the outward edge. The Z-shaped cuts are placed in pairs between said external radial cuts, the Z-shaped cuts of each pair being symmetrically placed with respect to a radius of the disc passing between them. The cuts have their ends turned backwards. <IMAGE>

Description

  • The present invention proposes a bearing disc for diamond tools according to the precharacterising part of claim 1 of the kind used for the manufacture of circular saws for cutting stone materials and the like in which cuts having a particular shape and position are provided, suitable for damping and/or preventing vibrations when the tool is used, see DE-U 76 01 953.
  • Because of the configuration of the components, therefore, the use of the tool itself is more comfortable and practical.
  • As it is known in the art when using rotating disc tools, the arising of vibrations is often a cause of trouble, said vibrations being joined with noise, overstrain of materials and being even able to break the tool or the piece.
  • Besides "mechanical" vibrations caused by building inaccuracies (e.g. eccentricity or distribution of the masses being not exactly symmetric with respect to the axis of rotation), there are also "elastic" vibrations generated by the recall forces opposing the disc deformations produced by the resistance of the material being processed.
  • The latter are the most troublesome and harmful vibrations, which it would be convenient to eliminate.
  • At the present state of the art, in order to reduce the elastic deformations, the disc is stiffened by tensioning it in the area comprised approximately between a third and two thirds of the diameter of the disc itself.
  • However, this system presents considerable limits of reliability, as in practice it depends on the experience of the person tensioning, and, moreover, it turns out to be rather expensive.
  • Furthermore, by tensioning the disc, the problem of vibrations is not eliminated, since it is only possible to relieve their negative effect on the disc.
  • On the contrary, it would be convenient to eliminate this phenomenon, by damping or even preventing vibrations.
  • For this purpose the present invention proposes a bearing disc for diamond tools in which there is provided a plurality of conveniently placed cuts, being able to damp or prevent this phenomenon.
  • This and other purposes are gained by a bearing disc for diamond tools having the features of claim 1.
  • The present invention will be now described in detail, with reference to the only enclosed figure showing the front view of a bearing according to the invention.
  • Basically, the bearing is made up of a conveniently thick metal disc, indicated as a whole by 1, to which the diamond portions (not illustrated in the figure) are welded connected with the edge and which has an axial hole, indicated by 2, for applying the disc to the shaft of a machine which may be a saw for cutting stones or another apparatus known in the art.
  • According to the invention on the disc is provided a set of cuts suitable for damping both tangential and radial vibrations.
  • More particularly there is a set of cuts 3 extending radially from the axis of the disc for a certain portion of it, besides a plurality of peripheral cuts 4, being radially orientated too, starting from the outward edge of the disc and being a few millimeters deep (10-20 mm).
  • Both cuts 3 and cuts 4 in their end portion run curvilinearly, in particular they run on a line like a small semi-circumference.
  • Cuts 3 are staggered with respect to cuts 4, in the sense that a straight line passing through cuts 3 halves the area comprised between two external cuts 4.
  • On the contrary, in order to damp radial vibrations there is provided a further set of cuts, indicated by reference numbers 5 and 6, being placed according to an annular set approximately near the outward diameter of the disc and a circle having a diameter equal to about two thirds of the disc itself.
  • Cuts 5 and 6 have the shape of a "Z" with the edges turned backwards and they are symmetric, in the sense that each cut 5 is the mirror-image of the corresponding cut 6, each pair of cuts 5 and 6 being placed between two consecutive external cuts 4.
  • To sum up, the invention provides radial cuts near the outward diameter and the disc hub, one being staggered with another, and "Z"-shaped cuts, which are placed near the outward diameter. The former have the function of damping tangential vibrations, whereas the latter damp both tangential and radial vibrations.
  • A bearing disc is thus obtained for diamond tools making the use of these tools much more practical and cheaper, being able to damp or eliminate vibrations almost completely.
  • Obviously, it will be possible to vary the sizes, as well as the materials used, as occasion may require.

Claims (3)

  1. A bearing disc (1) for diamond tools, comprising
    - a set of first radial cuts (3), near the disc hub;
    - a set of second radial cuts (4), being staggered with respect to the former, near the outward edge; characterized in that it provides:
    - a set of "Z"-shaped cuts (5, 6), approximately near the outward edge and
    that said "Z"-shaped cuts are placed in pairs between said external radial cuts (4), the "Z"-shaped cuts of each pair being a mirror image with each other with respect to a radius of the disc passing between them.
  2. A bearing disc according to claim 1, characterized in that said cuts have their ends turned backwards.
  3. Circular cutting tools characterized by a plurality of diamond portions on a bearing disc according to any one of the preceding Claims.
EP93118503A 1992-11-16 1993-11-16 Bearing disc for diamond tools, suitable for damping vibrations Expired - Lifetime EP0598389B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITPD920120 1992-11-16
IT92PD000120U IT228089Y1 (en) 1992-11-16 1992-11-16 DISC SUPPORT FOR DIAMOND TOOLS, TO DAMPEN VIBRATIONS

Publications (2)

Publication Number Publication Date
EP0598389A1 EP0598389A1 (en) 1994-05-25
EP0598389B1 true EP0598389B1 (en) 1997-01-08

Family

ID=11389999

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93118503A Expired - Lifetime EP0598389B1 (en) 1992-11-16 1993-11-16 Bearing disc for diamond tools, suitable for damping vibrations

Country Status (4)

Country Link
EP (1) EP0598389B1 (en)
AT (1) ATE147304T1 (en)
DE (1) DE69307280T2 (en)
IT (1) IT228089Y1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD382786S (en) 1995-03-02 1997-08-26 Black & Decker Inc. Circular saw blade with heat vents
USD383368S (en) 1996-03-15 1997-09-09 Black & Decker Inc. Saw blade with vents
USD388318S (en) 1996-03-15 1997-12-30 Black & Decker Inc. Decorative vent pattern for circular saw blades

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4328482C2 (en) * 1993-08-24 1998-01-29 Fgw Forsch Werkzeuge Werkstoff Circular saw blade
US5896800A (en) * 1995-09-26 1999-04-27 Black & Decker Inc. Circular saw blade
US5758561A (en) * 1995-09-26 1998-06-02 Black & Decker Inc. Circular saw blade and method
IT240788Y1 (en) * 1996-07-16 2001-04-11 Trentinutensil S N C Di Carnig STABLE AND SILENT CIRCULAR BLADE FOR DISC SAWING MACHINES
DE19822742A1 (en) * 1998-05-20 1999-11-25 Arntz Joh Wilh Fa Circular disc-shaped tool

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7601953U1 (en) * 1976-01-24 1976-10-28 Fa. Richard Jansen, 5630 Remscheid Circular or spiral saw blade
DE3232778A1 (en) * 1982-09-03 1984-03-08 Fa. Röttger Jansen-Herfeld, 5630 Remscheid VOLTAGE COMPENSATION SLOT
EP0489092B1 (en) * 1989-08-25 1993-08-11 Tyrolit Schleifmittelwerke Swarovski KG Trimming up abrading discs

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD382786S (en) 1995-03-02 1997-08-26 Black & Decker Inc. Circular saw blade with heat vents
USD383368S (en) 1996-03-15 1997-09-09 Black & Decker Inc. Saw blade with vents
USD388318S (en) 1996-03-15 1997-12-30 Black & Decker Inc. Decorative vent pattern for circular saw blades

Also Published As

Publication number Publication date
ATE147304T1 (en) 1997-01-15
ITPD920120V0 (en) 1992-11-16
DE69307280T2 (en) 1997-06-12
EP0598389A1 (en) 1994-05-25
DE69307280D1 (en) 1997-02-20
IT228089Y1 (en) 1998-02-05
ITPD920120U1 (en) 1994-05-16

Similar Documents

Publication Publication Date Title
US3700016A (en) Double slotted saw
US4641562A (en) Cutting tool for making a smooth saw cut
US4675975A (en) Combination planing and finishing tool
ATE130238T1 (en) SPINDLE FOR CLAMPING CIRCULAR SAW BLADES.
EP0598389B1 (en) Bearing disc for diamond tools, suitable for damping vibrations
US6739227B2 (en) Apparatus and method for providing an enhanced metal cutting saw blade
CA1227931A (en) Abrasive cutting wheel
RU2067522C1 (en) Combination tool for milling-sawing wood-working machine
CA2148843A1 (en) Indexable cut-off saw
US3299917A (en) Circular saw
US5704828A (en) Saw blade with sanding surface
US4979417A (en) Rotating saw blade having improved critical vibrational speed
EP0790885B1 (en) Saw blade
CA1305647C (en) Circular saw head
US5799558A (en) Arbor and circular saw with asymmetric spline having generally radial force-transmitting face
US5713259A (en) Saw disc for a high speed hand sawing machine
US5259428A (en) Rotary cutters
EP0101953A1 (en) Abrasive cutting wheel
EP0231110A2 (en) Saw blades
RU2048286C1 (en) Circular saw
JPH01264716A (en) Circular saw
AU644374B2 (en) Rotary cutters
RU2041800C1 (en) Wood-cutting device
SU631331A1 (en) Saw disc securing device
US20030000361A1 (en) Rotating cutter head for working the surface of elastomers

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: A1

Designated state(s): AT CH DE FR GB LI

17P Request for examination filed

Effective date: 19941102

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

17Q First examination report despatched

Effective date: 19960206

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

RAP3 Party data changed (applicant data changed or rights of an application transferred)

Owner name: KARMAN DI INSINNA ANTONIO

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): AT CH DE FR GB LI

REF Corresponds to:

Ref document number: 147304

Country of ref document: AT

Date of ref document: 19970115

Kind code of ref document: T

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: KATZAROV S.A.

Ref country code: CH

Ref legal event code: EP

ET Fr: translation filed
REF Corresponds to:

Ref document number: 69307280

Country of ref document: DE

Date of ref document: 19970220

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

Ref country code: CH

Payment date: 19981103

Year of fee payment: 6

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

Ref country code: GB

Payment date: 19981111

Year of fee payment: 6

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

Ref country code: AT

Payment date: 19981113

Year of fee payment: 6

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

Ref country code: FR

Payment date: 19981127

Year of fee payment: 6

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

Ref country code: DE

Payment date: 19990126

Year of fee payment: 6

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: 19991116

Ref country code: AT

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

Effective date: 19991116

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: 19991130

Ref country code: CH

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

Effective date: 19991130

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

Effective date: 19991116

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

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

Ref country code: FR

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

Effective date: 20000731

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: 20000901

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST