EP0625086A1 - Perfectionnements des dispositifs de decoupe. - Google Patents

Perfectionnements des dispositifs de decoupe.

Info

Publication number
EP0625086A1
EP0625086A1 EP93902457A EP93902457A EP0625086A1 EP 0625086 A1 EP0625086 A1 EP 0625086A1 EP 93902457 A EP93902457 A EP 93902457A EP 93902457 A EP93902457 A EP 93902457A EP 0625086 A1 EP0625086 A1 EP 0625086A1
Authority
EP
European Patent Office
Prior art keywords
cutting
cutting member
cutting device
ultrasonic
cutting edge
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
EP93902457A
Other languages
German (de)
English (en)
Other versions
EP0625086B1 (fr
Inventor
Francis Frederick Hamil Rawson
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.)
Individual
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 EP0625086A1 publication Critical patent/EP0625086A1/fr
Application granted granted Critical
Publication of EP0625086B1 publication Critical patent/EP0625086B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/08—Means for treating work or cutting member to facilitate cutting
    • B26D7/086—Means for treating work or cutting member to facilitate cutting by vibrating, e.g. ultrasonically

Definitions

  • This invention is concerned with improvements relating to cutting devices, particularly cutting devices which are operative at high (ultrasonic) frequency.
  • a cutting device comprising:
  • a cutting member having on one side of a diametral plane a driving face to be attached to a source of ultrasonic vibrations, said vibrations acting in a direction radially of the member;
  • the cutting member is generally annular, but may be provided in its outer surface with “flats”, or surfaces curved on different centres.
  • the centre of the annulus constitutes a theoretical anti-node, and vibration will occur alternately radially outwardly and inwardly from the centre of the annulus, so that the cutting member effects a "pulsation".
  • the cutting edge may subtend at an angle of between 45° and 270°, although in practise a cutting edge above 180° is unlikely to be of wide value, and preferably the range of the cutting edge is between 60° and 160°, with a cutting edge vibrating radially of the annular cutting member.
  • the cutting edge may be V-shape in cross-section, or two parallel cutting edges may be provided by machining a V-shape or U-shape groove into circumference of the cutting member at least over the circumferential distance thereof required to perform a cutting operation.
  • Such a cutting device may be used for cutting brittle and hard materials, such a ceramics or concrete, or soft materials, such as fabric, or foodstuffs.
  • Ur is the particle displacement in a radial direction at radius r and k is the wave number.
  • Equation (1) is a well known Bessel equation and a discrete solution is obtained for radial motion (after Watson 1962 Theory of Bessel Functions; London, Cambridge University Press) for an annular ring with inner and outer radii RI and R2 or at RI and R2 with zero stress.
  • K (RI + R2) 2n (2)
  • n is an integer, which means that radial motion occurs when the mean circumference of the annular ring (RI + R2) is equal to an integral number of wavelengths.
  • the analysis shows that radial motion is independent of disc thickness.
  • Finite Element modelling eg PAFEC'S FEA Computer Programmes, Nottingham, UK
  • the device may comprise a plurality of cutting members secured (e.g. by welding or bolting) in parallel array to a single drive member, to enable a plurality of parallel cuts to be produced simultaneously.
  • FIGURES la. and lb. are respectively side and front elevations of a cutting • device which is the first embodiment of the invention.
  • FIGURES 2a, and 2b are respectively side and front elevations of the cutting device which is the second embodiment of the invention.
  • FIGURE 3 is a schematic view showing a multi-bladed cutting device.
  • the device which is the first embodiment of the invention comprises an annular cutting member 6 having an inner radius of 50mm and an outer radius of 150mm, the cutting member being of aluminium with 4% copper alloy.
  • the member 6 is provided with a flat drive face 8 on one side of diametral plane, by which the cutting member is attached to an ultrasonic horn 10 providing a source of ultrasonic vibrations at a frequency of 18.2 kHz.
  • the face 8 will constitute an anti-node (portion of maximum displacement) and the centre of the aperture 12 of the member 6 providing a theoretical node.
  • the member 6 vibrates radially inwardly and outwardly, as shown by the arrows, in a pulsating manner.
  • the member 6 is provided with a circumferential cutting edge 14 subtending an angle of about 180° at the centre of the member which in the operation of the drive vibrates at a substantially uniform amplitude, allowing when the device is moved in the direction of the arrow A through a substrate 18, a cutting action to be effected.
  • parallel cutting edges 20a, 20b . are afforded by the provision of a generally U-shape groove or channel into the circumferential edge of the cutting member, to enable twin cutting tracks to be provided.
  • a plurality, specifically three cutting member 6a, 6b. 6c, each similar to the cutting member illustrated in Figure 1, are connected in parallel to a multi-stage ultrasonic horn 28, whereby the cutting edges 14 are all caused to vibrate together, enabling a multiple cut to be obtained in the substrate.
  • the cutting member is annular, if desired "flats" or alternatively curved faces may be provided on the other drcumference.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Surgical Instruments (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Preliminary Treatment Of Fibers (AREA)

Abstract

Dispositif de découpe comprenant un élément coupant (6) annulaire doté d'une face (8) d'entraînement plate située sur un côté d'un plan diamétral, permettant de fixer l'élément coupant (6) sur un pavillon à ultra-sons (10) constituant une source de vibrations ultrasonores. La face (8) est conçue pour constituer un anti-noeud du dispositif (une partie à déplacement maximum), et le centre de l'ouverture (12) de l'élément (6) constitue un noeud théorique (partie à déplacement nul). Les valeurs relatives de R1 représentant le rayon du trou de l'élément coupant (6), et de R2 représantant le diamètre externe de ce dernier, sont sélectionnées, en fonction des caractéristiques physiques de l'élément coupant, de sorte que l'élément (6) vibre radialement vers l'intérieur et vers l'extérieur, selon un mode pulsé. L'élément (6) est pourvu d'un bord coupant (14) circonférentiel sous-tendant un angle de 180° environ sur le côté opposé de la face (8) d'entraînement qui permet de produire l'action de découpe.
EP93902457A 1992-01-28 1993-01-25 Perfectionnements des dispositifs de decoupe Expired - Lifetime EP0625086B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9201785 1992-01-28
GB929201785A GB9201785D0 (en) 1992-01-28 1992-01-28 Improvements relating to cutting devices
PCT/GB1993/000159 WO1993014912A1 (fr) 1992-01-28 1993-01-25 Perfectionnements des dispositifs de decoupe

Publications (2)

Publication Number Publication Date
EP0625086A1 true EP0625086A1 (fr) 1994-11-23
EP0625086B1 EP0625086B1 (fr) 1997-04-02

Family

ID=10709381

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93902457A Expired - Lifetime EP0625086B1 (fr) 1992-01-28 1993-01-25 Perfectionnements des dispositifs de decoupe

Country Status (6)

Country Link
EP (1) EP0625086B1 (fr)
AT (1) ATE151004T1 (fr)
AU (1) AU3363693A (fr)
DE (1) DE69309445T2 (fr)
GB (1) GB9201785D0 (fr)
WO (1) WO1993014912A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2282559B (en) * 1993-10-07 1998-04-15 Rawson Francis F H Ultrasonic cutting device
GB9610417D0 (en) * 1996-05-17 1996-07-24 Rawson Francis F H Horn tuning and adjustment
GB2325192B (en) * 1997-05-16 2001-03-07 Rawson Francis F H Cutting devices
GB9711538D0 (en) * 1997-06-05 1997-07-30 Rawson Francis F H Improvements relating to cutting devices
GB2325874B (en) * 1997-06-05 2000-08-16 Rawson Francis F H Ultrasonic cutting device
DE102022102942A1 (de) 2022-02-08 2023-08-10 Herrmann Ultraschalltechnik Gmbh & Co. Kg Schneidsonotrode für das Schneiden von Kautschukbahnen

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4373412A (en) * 1980-07-10 1983-02-15 Gerber Garment Technology, Inc. Method and apparatus for cutting sheet material with a cutting wheel
GB2219245A (en) * 1988-06-03 1989-12-06 Rawson Francis F H Ultrasonic cutting

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9314912A1 *

Also Published As

Publication number Publication date
ATE151004T1 (de) 1997-04-15
EP0625086B1 (fr) 1997-04-02
WO1993014912A1 (fr) 1993-08-05
DE69309445D1 (de) 1997-05-07
AU3363693A (en) 1993-09-01
DE69309445T2 (de) 1997-10-30
GB9201785D0 (en) 1992-03-11

Similar Documents

Publication Publication Date Title
US5976316A (en) Non-nodal mounting system for acoustic horn
US4651044A (en) Electroacoustical transducer
JP4116570B2 (ja) 振動要素のための装着システム及び装着システムを形成するための方法
JP5020962B2 (ja) 円盤状の切削工具及び切削装置
EP0665083B1 (fr) Dispositif pour faciliter la coupe
GB1599461A (en) Ultrasonic transducer
US4651043A (en) Resonator exhibiting uniform motional output
JPS5937672B2 (ja) 超音波振動を利用した回転駆動装置
EP0625086B1 (fr) Perfectionnements des dispositifs de decoupe
JP2003180092A5 (fr)
JPH0532991B2 (fr)
US6984921B1 (en) Apparatus and method for resonant mounting of vibration structure
US7227966B2 (en) Piezo-electric speaker
JP2985509B2 (ja) 低周波水中送波器
JP2008212916A (ja) 超音波複合振動装置
JP3035526B2 (ja) カッター用基板
JP3352605B2 (ja) カッター用基板
JP2768340B2 (ja) 広帯域低周波送波器
JP3183232B2 (ja) 円筒型送波器
JP3485109B2 (ja) 超音波送受波器
JP2024096655A (ja) 超音波振動体の支持方法
JPH091066A (ja) 超音波アクチュエータ用振動子
SU1664265A1 (ru) Цилиндрическа щетка
SU995891A1 (ru) Ультразвуковой преобразователь
RU2029440C1 (ru) Гидроакустический излучатель

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

17P Request for examination filed

Effective date: 19940725

AK Designated contracting states

Kind code of ref document: A1

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

17Q First examination report despatched

Effective date: 19950724

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): AT CH DE FR GB IT LI

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

Ref country code: LI

Effective date: 19970402

Ref country code: CH

Effective date: 19970402

REF Corresponds to:

Ref document number: 151004

Country of ref document: AT

Date of ref document: 19970415

Kind code of ref document: T

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 69309445

Country of ref document: DE

Date of ref document: 19970507

ET Fr: translation filed
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

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: GB

Ref legal event code: IF02

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

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050125

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

Ref country code: DE

Payment date: 20050203

Year of fee payment: 13

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

Ref country code: AT

Payment date: 20050211

Year of fee payment: 13

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

Ref country code: AT

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

Effective date: 20060125

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

Ref country code: FR

Payment date: 20060131

Year of fee payment: 14

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: 20060801

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20070930

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: 20070131

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

Ref country code: IT

Payment date: 20060131

Year of fee payment: 14

PGRI Patent reinstated in contracting state [announced from national office to epo]

Ref country code: IT

Effective date: 20080301

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

Ref country code: GB

Payment date: 20080123

Year of fee payment: 16

PGRI Patent reinstated in contracting state [announced from national office to epo]

Ref country code: IT

Effective date: 20080301

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

Effective date: 20090125

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: 20090125