EP1175974B1 - Unité d'affûtage avec compensation d'usure du disque pour machine de découpe de mandrins ou rouleaux - Google Patents

Unité d'affûtage avec compensation d'usure du disque pour machine de découpe de mandrins ou rouleaux Download PDF

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Publication number
EP1175974B1
EP1175974B1 EP01202805A EP01202805A EP1175974B1 EP 1175974 B1 EP1175974 B1 EP 1175974B1 EP 01202805 A EP01202805 A EP 01202805A EP 01202805 A EP01202805 A EP 01202805A EP 1175974 B1 EP1175974 B1 EP 1175974B1
Authority
EP
European Patent Office
Prior art keywords
cutting
sharpening unit
disc
central shaft
lever
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
EP01202805A
Other languages
German (de)
English (en)
Other versions
EP1175974A3 (fr
EP1175974A2 (fr
Inventor
Giovanni Gambini
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Individual
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Individual
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Publication date
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Publication of EP1175974A2 publication Critical patent/EP1175974A2/fr
Publication of EP1175974A3 publication Critical patent/EP1175974A3/fr
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Publication of EP1175974B1 publication Critical patent/EP1175974B1/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
    • B24B3/368—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades installed as an accessory on another machine
    • 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
    • B26D7/12—Means for treating work or cutting member to facilitate cutting by sharpening the cutting member

Definitions

  • the present invention refers to a sharpening unit with disc wear recovery for a stick or log cutting machine according to the preamble of claim 1.
  • cutting to size of these final rolls is performed by cutting machines which receive the individual log, for example, and cut it in succession into a number of shorter rolls, each with the required dimensions.
  • These cutting machines use rotating blades, in the form of cutting discs, which cut the log or stick as it is gradually fed step by step, reducing it into a number of pieces of the required size.
  • disc blades feature a sharpened part or cutting edge which, as it is used, wears out or is lost and must be dressed in order to operate as required.
  • the main object of the present invention is to produce a sharpening unit that solves the above problems.
  • a further object of the present invention is to produce a unit for sharpening the discs of a cutting machine that eliminates the problems with connection of the electrical and electronic parts by means of rotating elements.
  • a further object of the present invention is to produce a unit for sharpening the discs of a cutting machine in which the moving masses are reduced to a minimum, eliminating all related problems.
  • a sharpening unit 11 is shown with wear recovery of a cutting disc 12 for the head 15 of a stick or log cutting machine, schematised in 13, on a feed surface 14.
  • the cutting unit consisting of two cutting heads 15 arranged diametrically opposite each other, is fitted on a general cross member 16 which can be moved up and/or down with respect to the feed surface 14 by means of a control unit, not shown, and is rotated by means of a central shaft 17.
  • a sleeve 18 is fixed to the cross member 16 and is positioned coaxial externally to the central shaft 17, which passes inside it.
  • the sleeve 18 supports, revolving via bearings 19, a rotating arm 20 which extends from both sides of the central shaft 17 and is fitted with a pair of cutting heads 15 of the cutting machine.
  • Each cutting head 15 has its own structure and is fitted with the above-mentioned cutting disc 12.
  • the cutting disc 12 is rotated by a kinematic chain (not specifically shown) fitted at the end with a timing pulley 21 moved by a timing belt 22, due also to the presence of relay pulleys 23.
  • a profiled box 24 bearing the moving part of the cutting disc 12 is rotated by a further pulley 25, controlled by a belt 26, with relay pulleys 23, and coaxial to the timing pulley 21.
  • Each cutting disc 12 rotates around a rotation axis 27 which can be moved according to the movements of the rotating arm 20 and profiled box 24.
  • the sharpening unit 11 is positioned in a cutting machine of the type described above.
  • the sharpening unit 11 comprises, revolving axially around the rotation axis 27 of each cutting disc 12, a lever 28 supported at one end by bearings 29.
  • the lever 28 houses a linear guide 30 bearing a trolley 31 on which two grinding wheels 33 are fitted by means of a supporting plate 32.
  • the two grinding wheels 33 each have X axis slanting in the opposite direction to the other grinding wheel axis thus collaborating from opposite sides with the cutting edge 35 of the cutting disc 12.
  • the trolley 31 bears half of an articulated joint such as a hinged joint or a ball joint 36, the second half of which is positioned on a further lever 37 controlled by a secondary rotation shaft 38 positioned coaxially inside the central shaft 17, which is the fulcrum of the lever 37.
  • the lever 37 is also supported by bearings 39 on the outer surface of the central shaft 17 which bears the rotating arm 20 with the cutting discs 12.
  • the secondary rotation shaft 38 is thus independent of the central or main rotation shaft 17.
  • the main rotation shaft 17 of the rotating arm 20 and the secondary rotation shaft 38 of the further lever 37 are connected to an angle timing device 40.
  • Said angle timing device 40 takes its movement from a main motor 42 and, via a transmission with differential inside the timing device 40, permits transmission in a ratio of 1/1 between the two outlet shafts 17 and 38.
  • This angle timing device 40 has the job of angle timing the two shafts 17 and 38 also with the shafts moving.
  • synchronised movement elements can be provided such as electronic or electromechanical means for co-ordinating rotation of the central shaft and secondary shaft.
  • a retiming motor 41 of the angle timing device 40 varies the angle between the main tool holder arm 20 and the wear control lever 37 on the cutting discs 12.
  • Variation of this angle involves sliding of the grinding wheel trolley 31 on the linear guide 30 positioned on the lever 28 hinged coaxially to each cutting disc 12. Sliding of the trolley 31 causes the grinding wheels 33 fitted on the same to move nearer or farther away from the centre of the disc.
  • a sharpening unit therefore permits sharpening of the cutting discs while they are moving, without any problem, directly preparing for said operation as the cutting disc diameter is gradually reduced by wear.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Claims (5)

  1. Unité d'affûtage (11) équipée d'un dispositif de compensation d'usure du disque pour une machine à découper les mandrins ou rondins, dans laquelle la machine à découper est pourvue d'au moins une tête de découpe (15) portant un disque de découpe (12) à moteur qui découpe transversalement, en rouleaux, les mandrins ou rondins (13) placés sur une surface d'alimentation (14), la tête (15) étant montée sur un bras rotatif (20) par rapport à un arbre central (17) positionné sur un élément transversal (16) qui peut être élevé et/ou abaissé par rapport à la surface d'alimentation (14), cette unité d'affûtage (11) étant montée coaxialement à l'arbre central (17), caractérisée en ce qu'elle comprend un premier levier (37), articulé sur l'arbre central (17) et monté sur un arbre secondaire (38) coaxial à elle (11), relié, au moyen d'un joint articulé (32) à un chariot (31) coulissant par rapport à un deuxième levier (28) qui tourne autour d'un axe de rotation (27) du disque de découpe (12), ce chariot (31) portant au moins une meule (33) pour affûter le disque de découpe (12), l'arbre central (17) et l'arbre secondaire (38) étant reliés par des éléments (40) à mouvement synchronisés.
  2. Unité d'affûtage selon la revendication 1, caractérisée en ce que le chariot (31) présente une plaque de support (32), ne formant qu'une seule pièce avec lui, portant deux meules (33), dont chacune présente un axe (X) incliné dans la direction opposée, permettant ainsi une interaction, à partir de côtés opposés, avec l'arête de coupe (35) du disque de découpe (12).
  3. Unité d'affûtage selon la revendication 1, caractérisée en ce que le joint articulé est un joint à rotule (32).
  4. Unité d'affûtage selon la revendication 1, caractérisée en ce que le bras rotatif (20) porte deux têtes de découpe (15) positionnées de façon diamétralement opposée l'une à l'autre, et en ce que chacune de ces têtes (15) est équipée d'un premier levier (37) respectif qui peut tourner autour de l'axe de rotation (27) respectif de chaque disque de découpe (12).
  5. Unité d'affûtage selon la revendication 1, caractérisée en ce que les éléments à mouvement synchronisé sont constitués par un dispositif de synchronisation angulaire (40).
EP01202805A 2000-07-27 2001-07-23 Unité d'affûtage avec compensation d'usure du disque pour machine de découpe de mandrins ou rouleaux Expired - Lifetime EP1175974B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI001722 2000-07-27
IT2000MI001722A IT1318260B1 (it) 2000-07-27 2000-07-27 Gruppo di affilatura con recupero usura disco per macchina troncatrice di bastoni o log

Publications (3)

Publication Number Publication Date
EP1175974A2 EP1175974A2 (fr) 2002-01-30
EP1175974A3 EP1175974A3 (fr) 2003-11-19
EP1175974B1 true EP1175974B1 (fr) 2005-06-08

Family

ID=11445579

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01202805A Expired - Lifetime EP1175974B1 (fr) 2000-07-27 2001-07-23 Unité d'affûtage avec compensation d'usure du disque pour machine de découpe de mandrins ou rouleaux

Country Status (6)

Country Link
US (1) US20020031991A1 (fr)
EP (1) EP1175974B1 (fr)
AT (1) ATE297300T1 (fr)
DE (1) DE60111307T2 (fr)
ES (1) ES2243392T3 (fr)
IT (1) IT1318260B1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITFI20020197A1 (it) * 2002-10-18 2004-04-19 Perini Fabio Spa Una macchina troncatrice con un gruppo di affilatura per una lama, metodo di affilatura e lama per detta macchina
ITFI20050113A1 (it) * 2005-05-27 2006-11-28 Perini Fabio Spa Macchina troncatrice per il taglio di rotoli o log di materiale nastriforme e relativo metodo
CN102873599B (zh) * 2012-10-27 2014-10-29 株洲肯特硬质合金有限公司 一种圆形刀片的刃口倒棱装置及倒棱方法
WO2016030125A1 (fr) * 2014-08-29 2016-03-03 Fabio Perini S.P.A. Machine de coupe de rondins au moyen de meules et procédé
IT201700081298A1 (it) * 2017-07-18 2019-01-18 Perini Fabio Spa Macchina troncatrice per tagliare prodotti allungati e relativo metodo
CN113618538B (zh) * 2021-07-23 2023-07-07 南京市蓝业科技有限公司 一种制造铁锹用木棒旋转打磨设备
CN115139165B (zh) * 2022-09-01 2023-03-17 苏州圣亚精密机械有限公司 一种机床刀具修整磨削结构

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1103635B (it) * 1978-07-27 1985-10-14 Perini Fabio Macchina a piu lame per tagliare in rotoli un cilindropdi carta od altro
US4347771A (en) * 1980-11-10 1982-09-07 Paper Converting Machine Company Apparatus for sharpening a disc
US4584917A (en) * 1984-12-06 1986-04-29 Paper Converting Machine Company Automatic blade diameter compensation for log saws
US5152203A (en) * 1991-08-19 1992-10-06 Paper Converting Machine Company Apparatus and method for sharpening saw blades having planetary motion in transverse cutting
IT1258171B (it) * 1992-02-07 1996-02-20 Perini Fabio Spa Metodo di taglio e macchina troncatrice per rotoli di carta e simili
US5557997A (en) * 1994-04-06 1996-09-24 Paper Converting Machine Company Apparatus for transverse cutting

Also Published As

Publication number Publication date
IT1318260B1 (it) 2003-07-28
US20020031991A1 (en) 2002-03-14
EP1175974A3 (fr) 2003-11-19
ES2243392T3 (es) 2005-12-01
DE60111307D1 (de) 2005-07-14
ATE297300T1 (de) 2005-06-15
EP1175974A2 (fr) 2002-01-30
ITMI20001722A1 (it) 2002-01-27
DE60111307T2 (de) 2006-05-24
ITMI20001722A0 (it) 2000-07-27

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