EP0591109B1 - Appareil perfectionné pour le meulage et l'affûtage de lames en général - Google Patents

Appareil perfectionné pour le meulage et l'affûtage de lames en général Download PDF

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Publication number
EP0591109B1
EP0591109B1 EP93830306A EP93830306A EP0591109B1 EP 0591109 B1 EP0591109 B1 EP 0591109B1 EP 93830306 A EP93830306 A EP 93830306A EP 93830306 A EP93830306 A EP 93830306A EP 0591109 B1 EP0591109 B1 EP 0591109B1
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EP
European Patent Office
Prior art keywords
machine according
grinding
grinding wheels
shafts
machine
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
EP93830306A
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German (de)
English (en)
Other versions
EP0591109A1 (fr
Inventor
Patrizio Fazzini
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
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Individual
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Publication date
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Publication of EP0591109A1 publication Critical patent/EP0591109A1/fr
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Classifications

    • 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
    • B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
    • B24B3/36—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades
    • B24B3/52—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades of shear blades or scissors
    • 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
    • B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
    • B24B3/36—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades
    • B24B3/54—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades of hand or table knives

Definitions

  • the present invention relates to a machine for grinding and sharpening blades in general, as it is defined in the preamble of claim 1.
  • a machine for grinding and sharpening blades in general, as it is defined in the preamble of claim 1.
  • Such a machine is known, for example, from DE-U-77 27 096.
  • bearing shafts are cantilever-wise supported and, accordingly, they can be subjected to objectionable clearances which, in addition to providing a poor quality sharpending of the blades, can generate vibrations susceptible to further increase the operating noise of the machine.
  • the aim of the present invention is to overcome the above mentioned drawbacks, by providing an improved machine for grinding and sharpening blades in general, which allows to carry out these two working operations, i.e. the grinding and sharpening operations, by a single processing step, thereby greatly reducing the processing time on the blade.
  • a main object of the present invention is to provide such an improved machine which can be used very easily and in particular by those users which must frequently grind and sharpen their operating blades.
  • Another object of the present invention is to provide such a machine which is practically noise free and very reliable in operation and which, moreover, can be easily made starting from easily available elements and materials and which, accordingly, is very competitive from a mere economic standpoint.
  • the improved machine for grinding and sharpending blades in general comprises a bearing framework, generally indicated at the reference number 1, which comprises a front plate 2 and a rear plate 3 which are mutually parallel and spaced.
  • the plates 2 and 3 support, through ball bearings, a first shaft 4 for supporting a first grinding wheel 2-and a second supporting shaft 6, for supporting a second grinding wheel 7.
  • a third supporting shaft 8 supporting an auxiliary grinding wheel 9, provided for sharpening scissors and the like, as it will become more apparent hereinafter.
  • the shafts 4, 6 and 8 are mutually parallel, and the grinding wheels are arranged between the plates 2 and 3, and they, accordingly, are connected to shafts which are affixed at both the end portions thereof, and, accordingly, the grinding wheels will be caused to turn in a very reliable way.
  • first toothed pulley 10 To the first shaft 4 there is connected a first toothed pulley 10 and to the second shaft there is connected a second toothed pulley 11, whereas to the third shaft 8 there is connected a transmission toothed pulley 12.
  • the toothed belt 20 is driven by a driving gear wheel 21 which is connected to a driving assembly 22, supported by a slide plate 24 having elongated slots 25 allowing the position of the driving assembly to be changed, so as to also operate as a tension assembly for the belt.
  • the grinding wheels 5 and 7 are advantageously provided with helical tooth arrangements 30, equi-spaced from one another, so as to provide a mutual crossing at their mutual connection region, in order to define a precise sharpening region which is arranged at a notch 40 provided on a guiding plate 41 so as to provide a precise and accurate location of the blade to be sharpened.
  • the grinding wheels 5 and 7 are provided, at their axial end portions, with rounded parts 42, on the corner of the threads at the burrs, so as to prevent any processing defects from occurring.
  • the grinding wheels which have a helical contour or, if desired, a flat contour, are coated by a diamond powder, or by like coating substances, in particular those which are commercially available with the trade name of Borazon.
  • the guiding plate 41 is provided, at the auxiliary grinding wheel 9, with a guiding recess 50, allowing to properly locate scissors blades or the like.
  • an improved machine which allows to perform both the sharpening operation, with a removal of the burrs and the dead edge of the blades, and the re-sharpening of old blades, which have lost their cutting edge, thereby providing a new cutting edge and removing the related processing burrs.
  • the machine according to the invention which can be used in a very simple manner, is practically free of any noise owing to the provision of the toothed belts which allows to perform a very accurate sharpening, in particular owing to the proper location of the shafts supporting the grinding wheels, which are devoid of vibrations, since they are supported at two supporting regions, arranged near the end portions thereof.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
  • Paper (AREA)
  • Dry Shavers And Clippers (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Claims (10)

  1. Machine pour meuler et affiler des lames en général comprenant un châssis de support qui est doté d'une plaque frontale et d'une plaque arrière supportant au moins deux arbres dont chacun porte une meule, lesdits arbres étant arrangés de sorte que leurs axes sont parallèles et mutuellement éloignés en causant une pénétration partielle desdites meules dans lesdites zones mutuellement opposées, un dispositif d'entraînement étant mis en oeuvre pour provoquer la rotation desdits arbres respectivement autour de leurs axes et dans des sens de rotation contraires, ledit dispositif d'entraînement comprenant des courroies de transmission dentées s'engrenant dans des pignons reliés auxdits arbres pour le mouvement rotatif opposé desdites meules, caractérisée en ce que lesdites meules et leurs arbres sont montés, de manière à pouvoir tourner, entre ladite plaque frontale et ladite plaque arrière.
  2. Une machine selon la revendication 1, caractérisée en ce que ladite machine comprend un premier pignon et un second pignon qui sont respectivement fixés sur les arbres portant les meules, une courroie dentée étant menée par lesdits pignons laquelle est aussi menée par un troisième pignon supporté par un troisième arbre auquel est reliée une meule auxiliaire, ladite courroie dentée étant entraînée par un pignon menant relié à un mécanisme d'entraînement.
  3. Une machine selon les revendications précédentes, caractérisée en ce que ledit mécanisme d'entraînement est supporté par une plaque coulissante reliée audit châssis de support et dotée de fentes allongées permettant le déplacement de ladite plaque pour tendre ladite courroie.
  4. Une machine selon l'une ou plusieurs des revendications précédentes, caractérisée en ce que la surface desdites meules a un profil plat.
  5. Une machine selon l'une ou plusieurs des revendications précédentes, caractérisée en ce que lesdites meules ont un profil hélicoïdal.
  6. Une machine selon l'une ou plusieurs des revendications précédentes, caractérisée en ce que le profil hélicoïdal desdites meules est arrondi à ses extrémités axiales.
  7. Une machine selon l'une ou plusieurs des revendications précédentes, caractérisée en ce que ladite machine comprend aussi une plaque-guide avec une encoche arrangée entre lesdites meules et adaptée à définir la localisation de la lame destinée à être meulée et affilée.
  8. Une machine selon l'une ou plusieurs des revendications précédentes, caractérisée en ce que ladite plaque-guide est dotée d'un évidement en proximité de ladite meule auxiliaire, mis en place pour y introduire des ciseaux et d'autres objets de ce genre.
  9. Une machine selon l'une ou plusieurs des revendications précédentes, caractérisée en ce que lesdites meules sont recouvertes d'égrisé.
  10. Une machine selon l'une ou plusieurs des revendications précédentes, caractérisée en ce que lesdites meules sont recouvertes par des substances connues dans le commerce sous la dénomination commerciale de «Borazon».
EP93830306A 1992-09-01 1993-07-20 Appareil perfectionné pour le meulage et l'affûtage de lames en général Expired - Lifetime EP0591109B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI922042A IT1256364B (it) 1992-09-01 1992-09-01 Macchina perfezionata per l'arrotatura e l'affilatura di lame in genere
ITMI922042 1992-09-01

Publications (2)

Publication Number Publication Date
EP0591109A1 EP0591109A1 (fr) 1994-04-06
EP0591109B1 true EP0591109B1 (fr) 1997-05-21

Family

ID=11363901

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93830306A Expired - Lifetime EP0591109B1 (fr) 1992-09-01 1993-07-20 Appareil perfectionné pour le meulage et l'affûtage de lames en général

Country Status (4)

Country Link
EP (1) EP0591109B1 (fr)
AT (1) ATE153269T1 (fr)
DE (1) DE69310853T2 (fr)
IT (1) IT1256364B (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT239376Y1 (it) * 1995-02-20 2001-02-26 Valex Spa Mola ad acqua migliorata
EP1745886A1 (fr) * 2005-07-20 2007-01-24 Hans-Peter Zahnd Dispositif d'affûtage
ITMI20070758A1 (it) * 2007-04-13 2008-10-14 Fazzini Technology Dispositivo affilacotelli dotato di una struttura perfezionata
CN111250301B (zh) * 2020-03-13 2021-09-21 浙江智菱科技有限公司 一种滚轮喷胶装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3332173A (en) * 1964-06-30 1967-07-25 Cory Corp Sharpener for cutting instruments
DE7727096U1 (de) * 1977-09-01 1977-12-08 Friedr. Dick Gmbh, 7300 Esslingen Schleifgeraet zum schaerfen von messerschneiden
ZA851702B (en) * 1984-03-12 1985-10-30 Daniel D Friel Knife sharpener

Also Published As

Publication number Publication date
ATE153269T1 (de) 1997-06-15
ITMI922042A1 (it) 1994-03-01
DE69310853D1 (de) 1997-06-26
DE69310853T2 (de) 1997-12-18
ITMI922042A0 (it) 1992-09-01
EP0591109A1 (fr) 1994-04-06
IT1256364B (it) 1995-12-04

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