EP3448644B1 - Machine de sciage de rouleaux comprenant des meules et procédé de meulage - Google Patents

Machine de sciage de rouleaux comprenant des meules et procédé de meulage Download PDF

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Publication number
EP3448644B1
EP3448644B1 EP17718877.8A EP17718877A EP3448644B1 EP 3448644 B1 EP3448644 B1 EP 3448644B1 EP 17718877 A EP17718877 A EP 17718877A EP 3448644 B1 EP3448644 B1 EP 3448644B1
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EP
European Patent Office
Prior art keywords
disc
cutting blade
shaped cutting
grinding
grinding wheel
Prior art date
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Application number
EP17718877.8A
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German (de)
English (en)
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EP3448644A1 (fr
Inventor
Romano Maddaleni
Mario Gioni Chiocchetti
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Fabio Perini SpA
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Fabio Perini SpA
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Publication of EP3448644A1 publication Critical patent/EP3448644A1/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
    • 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
    • B24B3/46—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades of disc blades
    • 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
    • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/16—Cutting rods or tubes transversely
    • 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
    • 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
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/12—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis
    • B26D1/14—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter
    • B26D1/157—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter rotating about a movable axis
    • B26D1/16—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter rotating about a movable axis mounted on a movable arm or the like
    • 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
    • B26D2210/00—Machines or methods used for cutting special materials
    • B26D2210/11—Machines or methods used for cutting special materials for cutting web rolls

Definitions

  • the present invention relates to the field of machines for processing logs of web material, in particular, but without limitation, logs of paper, for instance, although without limitation, tissue paper or the like for producing toilet paper, kitchen towels and the like.
  • logs of significant axial dimensions are produced and are subsequently cut into smaller rolls, i.e. into rolls of smaller axial dimension intended for packaging and sale.
  • Typical examples of this kind of processing are in the field of tissue paper converting, for producing rolls of toilet paper, kitchen towels and the like.
  • plies of cellulose material are produced by means of continuous machines and wound into so-called parent reels. These latter are then unwound and wound again in rewinding machines, to form logs, the axial length whereof corresponds to the width of the ply produced by the paper mill and is equal to a multiple of the axial length of the products to be marketed.
  • saw machines are used to cut the logs into rolls of smaller axial dimensions, intended for packaging and marketing. Examples of saw machines of this type are disclosed in US6786808 , US5522292 , US20060000312 , US20060011015 , and WO201603125 .
  • the saw machines for logs of wound web material, especially tissue paper typically comprise a feeding path for the logs to be cut and a cutting head arranged along the feeding path.
  • the cutting head comprises one or more disc-shaped cutting blades, which rotate around their axis and are also provided with a cyclical movement (a rotating or oscillating movement, for instance) to cut sequentially the logs of greater axial dimensions, fed along the feeding path, into single subsequent rolls.
  • the disc-shaped cutting blades are subject to wear and therefore require to be often ground. When it is ground, the disc-shaped cutting blade is gradually eroded, with a consequent reduction of its diameter. When the minimal diameter dimension is achieved, the disc-shaped cutting blade shall be replaced.
  • the cutting blade is usually ground by means of two grinding wheels pressed against opposite sides of a circular cutting bevel of the disc-shaped cutting blade.
  • the grinding wheels may be motorized, i.e. driven into rotation by means of respective motors, for example electric or pneumatic motors.
  • the grinding wheels are supported idle and driven into rotation by friction between the active surface of the grinding wheel and the blade surface to be ground.
  • a non-optimal repeated grinding causes a nonuniform consumption of the disc-shaped cutting blade, a consequent worse cutting quality and the deformation of the disc-shaped cutting blade, the cutting edge whereof tends to lose its round shape and to become polygonal.
  • the useful life of a disc-shaped cutting blade significantly decreases as the cutting edge thereof becomes polygonal in shape.
  • WO-A-01/36151 discloses a grinding device for a log saw according to the preamble of claim 1.
  • the grinding device comprises two grinding wheels which are arranged on opposite sides of a cutting edge of the disc-shaped cutting blade. The two grinding wheels are driven into rotation by contact friction with the disc-shaped blade and by air jets generated by air nozzles.
  • US-A-2006/0162522 discloses a log saw provided with three disc-shaped cutting blades. Each cutting blade is in turn provided with a grinding unit, comprised of two motorized grinding wheels.
  • GB-A-2171345 discloses a sharpening device for a disc knife for use in a cigarette manufacturing machine.
  • the sharpening device is comprised of two grinding members.
  • the grinding members are motor-driven and have different shapes and dimensions. They are arranged with their rotation axes falling outside the circular cutting edge of the disc knife.
  • a first grinding member has an annular cup form and is provided with a grinding surface at its rim. The rim surrounds a hollow.
  • the second grinding member is a grinding wheel, which has its axis of rotation inclined to that of the cup-shaped annular grinding member.
  • the diameter of the grinding wheel is substantially smaller than the diameter of the grinding rim of said cup-shaped grinding member.
  • WO-A-00/40367 discloses a sharpener assembly for a food slicer.
  • the sharpener comprises two grinding wheels.
  • the two grinding wheels are made of different materials such that one wheel is more aggressive and the other is less aggressive and is used for truing.
  • the two grinding wheels are arranged with respect to the disc blade such that the speed vectors of the two wheels are oriented in opposite directions with respect to the cutting edge of the disc blade.
  • one of the wheels is arranged such that the relative velocity vector is oriented outwards with respect to the cutting edge.
  • a log saw machine comprising a feeding path for the logs to be cut and a cutting head arranged along the feeding path.
  • the cutting head comprises a disc-shaped cutting blade rotating around a rotation axis and provided with a cyclical movement for cutting the logs.
  • the cutting head also comprises two grinding wheels, which are arranged and configured to grind two sides of a cutting edge of the disc-shaped cutting blade, and each of which rotates around its rotation axis.
  • the grinding wheels are so arranged, with respect to the disc-shaped cutting blade, that, in a contact area between each grinding wheel and the disc-shaped cutting blade, the grinding wheel has a velocity directed towards the inside of the cutting edge.
  • the contact area between the grinding wheel and the respective side of the cutting edge has a velocity represented by a vector directed towards the inside of the cutting edge instead of towards the outside thereof. If this relative motion condition occurs for both the grinding wheels, a more regular grinding is provided, as well as a better cutting quality.
  • the grinding wheels are so arranged, with respect to the disc-shaped cutting blade, that the contact areas between the grinding wheels and the disc-shaped cutting blade are arranged between two approximately parallel planes, each of which contains the rotation axis of one of the grinding wheels.
  • the planes are approximately parallel to a plane containing the rotation axis of the disc-shaped cutting blade.
  • the grinding wheels are supported idle and driven into rotation by friction with the disc-shaped cutting blade thanks to the torque generated on the grinding wheels by the friction between these latter and the disc-shaped cutting blade.
  • the two contact areas between the grinding wheels and the disc-shaped cutting blade are symmetrical with respect to a plane containing the rotation axis of the cutting blade and extending between the rotation axes of the two grinding wheels.
  • the two grinding wheels may be so arranged that, when they are in an operative position into contact with the disc-shaped cutting blade, the rotation axis of a first of said two grinding wheels is arranged outside the cutting edge of the disc-shaped cutting blade, and the rotation axis of the other of said two grinding wheels is arranged inside the cutting edge so as to intersect the disc-shaped cutting blade.
  • a method of grinding a disc-shaped cutting blade of a saw machine for cutting logs of web material is provided.
  • the method is defined in claim 5.
  • Figure 1 schematically shows the main members of a saw machine 1, that may comprise the novel features described herein for the grinding system.
  • the structure of the saw machine can be different from the one briefly described herein.
  • different drive means can be provided for transmitting the advancing motion of the logs and of the disc-shaped cutting blade. This latter can be provided with a reciprocating motion, for instance a pivoting motion, instead of a continuous motion.
  • the cutting head of the saw machine may comprise more disc-shaped cutting blades.
  • the saw machine 1 illustrated herein comprises a feeding path schematically indicated with P, along which the logs L, that shall be cut into rolls R of smaller axial dimension, move forward. The rolls are then fed to packaging machines, not shown.
  • the saw machine is arranged downstream of a rewinding machine and of further processing stations, not shown and known by those skilled in the art.
  • the saw machine 1 comprises a cutting station 3, which in turn comprises a cutting head schematically indicated with number 5.
  • the cutting head 5 may comprise an orbital head 7 rotating around the rotation axis A-A, which may be generally oriented approximately in the same direction as the feeding path P for the logs L to be cut.
  • the orbital head 7 of the cutting head 5 carries at least one disc-shaped cutting blade 9, which can rotate around a rotation axis B-B.
  • the rotation axis B-B of the disc-shaped cutting blade 9 may be generally oriented approximately in the direction of the axis A-A.
  • the saw machine 1 can comprise a motor 11 providing the disc-shaped cutting blade 9 with the rotary motion, and a further motor 13, providing the cutting head 5 and the orbital head 7 with the rotary motion around the axis A-A.
  • the logs L can move forward according to the feeding path PA along one or more lanes parallel to one another, so as to cut simultaneously more logs and increase the productivity of the saw machine 1, as known by those skilled in the art.
  • the forward movement of the logs L may be provided, for instance, by means of a continuous flexible member 15, such as a chain or a belt, driven by a motor 17.
  • a continuous flexible member 15 such as a chain or a belt
  • the motors 11, 13, and 17 can be controlled by a central control unit 19, in a manner known to those skilled in the art and not described in greater detail.
  • the flexible member 15 can comprise pushers 16 arranged at preferably regular intervals along the extension of the flexible member 15, to push each single log L along the feeding path PA through the cutting station 3.
  • the forward movement of the logs can be continuous, at constant or variable speed. In other embodiments, the forward movement can be intermittent.
  • the log is cut by the disc-shaped cutting blade 9.
  • the orbital head 7 and/or the disc-shaped cutting blade 9 can have a forward and backward movement along the path PA to cut the log L while this latter moves along the feeding path PA without stopping, as known by those skilled in the art.
  • clamps can be provided; they close during the cutting step to hold the log, thus ensuring a better cut quality, and open when the log shall move forward.
  • two clamps re provided: one upstream of the cutting plane, to hold the log, and one downstream of the cutting plane, to hold the part of the log that is cut to form a roll.
  • the rotation of the orbital head 7 around the axis A-A transmits a cyclic movement to the disc-shaped cutting blade 9, so that between subsequent cuts of the log(s) L, the log(s) L can move forwards.
  • Figure 2 illustrates an embodiment of the cutting head 5 and, especially, of the orbital head 7.
  • the cutting head 5 comprises a slide 21 mounted on the orbital head 7 so as to move according to the double arrow 21 for the purposes that will be better described below.
  • the slide 21 is guided on guides carried by the orbital head 7.
  • a gear motor 25 moves the slide 21 according to the double arrow f21.
  • the motion can be transmitted by means of a system with a threaded bar 27 and a nut screw 29, for instance a recirculating ball screw.
  • the nut screw 29 can be fastened to the slide 21.
  • each grinding unit 31, 33 comprises a respective grinding wheel for grinding the disc-shaped cutting blade 9, and a controlled approach system to move the respective grinding wheel towards the cutting edge of the disc-shaped cutting blade, so as to move periodically the grinding wheel towards the disc-shaped cutting blade 9.
  • the grinding wheels of the two grinding units 31 and 33 are labelled 32 and 34 respectively.
  • the grinding wheel 32 rotates around an axis C-C and the grinding wheel 34 rotates around an axis D-D.
  • the two grinding wheels 32 and 34 are so arranged that each of them can approach one of the two sides of the cutting edge or bevel 9B of the disc-shaped cutting blade 9, so that each of them grinds one of the two sides of the cutting bevel 9B.
  • the two grinding wheels 32, 34 of the two grinding units 31, 33 can be equal to each other, for instance when the disc-shaped cutting blade is symmetrical with respect to its median plane, indicated with T in Figure 2 . However, this is not necessary, but only preferred in some embodiments. As known, according to some embodiments the disc-shaped cutting blade 9 can have an asymmetrical bevel. In this case, the grinding wheels of the two grinding units can be different from each other and/or they can be adjusted differently from each other.
  • the two grinding wheels are supported in supports 36, 38 by means of shafts 40, 42.
  • the shafts 40, 42, and therefore the grinding wheels 32, 34 are supported idle in the supports 36, 38; the rotation of the grinding wheels 32, 34 is therefore due to the friction between the active surface of each grinding wheel and the respective side of the cutting edge 9B on which the wheel 32, 34 acts.
  • Reference numbers 32A and 34A indicate the abrasive surfaces of the two grinding wheels 32 and 34, acting on the sides of the cutting bevel or cutting edge 9B.
  • Each grinding wheel 32, 34 may have two opposite abrasive surfaces, and may be mounted in two different positions, in order to allow the wheel a longer useful life, by using the two abrasive surfaces until they are exhausted and are no longer able to grind.
  • the cutting head 5 comprises a coupling for the disc-shaped cutting blade 9, indicated as a whole with number 35.
  • the coupling 35 can comprise a mandrel or rotary shaft 37, driven into rotation by a toothed wheel or pulley 39, around which a toothed belt 41 can be driven, controlled by a motor 11 or other suitable motion source, not shown in detail.
  • the grinding wheel 32 is mounted on the slide 21 so that the rotation axis C-C of the grinding wheel 32 is external with respect to the disc-shaped cutting blade 9, i.e. external with respect to the edge or bevel 9B of the disc-shaped cutting blade 9. Moreover, the grinding wheel 32 is so mounted as to touch the respective side of the cutting edge 9B of the disc-shaped cutting blade 9 in the area Z32 ( Figure 4 ).
  • the area Z32 is arranged between a plane P containing the rotation axis B-B of the disc-shaped cutting blade and a plane P32 ( Figure 4 ) containing the axis C-C of the grinding wheel 32 and approximately parallel to the plane P.
  • the plane P is orthogonal to the median plane (plane T, Figure 3 ) of the disc-shaped cutting blade 9.
  • F0 indicates the resultant of the friction force generated by the contact between the grinding wheel 32 and the disc-shaped cutting blade 9 acting on the grinding wheel 32.
  • the vector F0 is tangent to the cutting edge 9B in the area Z32. It can be divided into the components F1 and F2, orthogonal to each other, wherein the component F1 is orthogonal to the radius R of the grinding wheel 32. Therefore, the component F1 gives the torque driving into rotation the grinding wheel 32 rotating according to the arrow f32 when it is in contact with the disc-shaped cutting blade 9.
  • the component F1 of the friction force F0 is directed in the same direction as the vector representing the tangential velocity of the grinding wheel 32.
  • the direction of rotation of the grinding wheel 32 is therefore "entering” the cutting edge 9B.
  • Entering means that the surface 32S of the wheel in the area Z32 moves from the edge or bevel 9B towards the axis B-B of the disc-shaped cutting edge 9.
  • the vectorial velocity of the grinding wheel in the area of contact with the disc-shaped cutting blade 9 is therefore directed towards the inside of the cutting edge.
  • the smaller one ⁇ of the angles between the vectors representing the tangential velocities of the disc-shaped cutting blade 9 and the grinding wheel is less than 90°.
  • the "entering" direction of the movement of the grinding wheel 32 with respect to the disc-shaped cutting blade 9 in the area of reciprocal contact between the grinding wheel 32 and the disc-shaped cutting blade 9 is optimal for the cleaning of the edge of bevel 9B; namely, any chips or filaments are moved away from the cutting edge 9B towards the axis of the disc-shaped cutting blade 9; in this way they do not project from the cutting edge 9B, what would negatively affect the cutting quality.
  • the grinding wheel 34 is so arranged as to touch the cutting edge 9B in an area Z34.
  • the area Z34 is arranged in an intermediate position between the plane P defined above and a plane P34, approximately parallel to the plane P and containing the rotation axis D-D of the grinding wheel 34.
  • F0 indicates the resultant of the friction forces between the grinding wheel 34 and the disc-shaped cutting blade 9 acting on the grinding wheel 34.
  • the vector F0 can be divided into components F3 and F4, wherein the vector F3 (similarly to the vector F1) transmits the rotation torque to the grinding wheel 34 and is directed in the same direction as the vector representing the peripheral velocity of the grinding wheel 34 in the area Z34, the grinding wheel 34 rotating according to the arrow f34.
  • the grinding wheel 34 has a peripheral velocity directed towards the inside of the cutting edge 9B; this avoids the formation of chips or filaments that may project outside the cutting edge 9B, and more precisely outside the joining line of the two sides defining the cutting edge 9B.
  • the condition described above is due to the fact that the grinding wheel 34 is arranged with the rotation axis D-D thereof close to the rotation axis B-B of the disc-shaped cutting blade 9. More in particular, the rotation axis D-D of the grinding wheel 34 is so arranged as to intersect the disc-shaped cutting blade 9, at a radial distance DR with respect to the line defining the edge of the cutting chamfer 9B.
  • the arrangement of the grinding wheels 32, 34 described above allows, for both the grinding wheels, such a direction of rotation that, in the contact area between the grinding wheel 32, 34 and the disc-shaped cutting blade 9, the peripheral velocity of the grinding wheel 32, 34 is directed towards the inside of the cutting edge, i.e. it has a velocity component directed radially towards the rotation axis B-B of the disc-shaped cutting blade 9, so as to have optimal grinding conditions, preventing the formation of filaments or chips projecting outside the disc-shaped cutting blade 9.
  • the grinding wheels 32, 34 are in such a position that the contact areas Z32 and Z34 between the grinding wheels and the disc-shaped cutting blade 9 are near each other. Namely, the two contact areas are located between the two planes P32 and P34 ( Figure 4 ) containing the rotation axes C-C and D-D of the two grinding wheels 32, 34. This condition is particularly advantageous as it limits bending of the disc-shaped cutting blade 9 during grinding due to the pressure of the grinding wheels 32, 34 against the disc-shaped cutting blade 9.
  • the contact areas Z32 and Z34 between each grinding wheel 32, 34 and the disc-shaped cutting blade 9 are symmetrical with respect to the plane P, i.e. with respect to the plane containing the rotation axis B-B of the disc-shaped cutting blade 9 and intermediate between the rotation axes C-C and D-D of the grinding wheels 32, 34.
  • the supports 36, 38 of the grinding wheels 32, 34 are arranged on the same side of the plane T where there is the circular line defining the edge of the cutting bevel 9B, i.e. the line formed by the intersection of the two sides of the cutting edge 9B. This is particularly advantageous for accessing and replacing the disc-shaped cutting blade 9.
  • the two supports 36, 38 may be arranged on opposite sides of the plane T. In this case, advantages may result from the possibility of moving the rotation axes C-C and D-D of the two grinding wheels 32, 34 closer to each other, consequently moving the areas Z32 and Z34 closer to each other.
  • the grinding wheels 32 and 34 are mounted idle and driven into rotation by friction between each grinding wheel 32, 34 and the disc-shaped cutting blade 9. This is particularly advantageous as it results in the grinding device being simple and reliable.
  • the lack of rotation motors prevents the grinding wheels from malfunctioning and stopping due to faults of the motors.

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  • 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)
  • Debarking, Splitting, And Disintegration Of Timber (AREA)

Claims (8)

  1. Une machine de sciage (1) pour couper des rouleaux de matériau en bande, comprenant :
    un chemin d'avancement (PA) pour les rouleaux (L) à couper ;
    une tête de coupe (5) agencée le long du chemin d'avancement (PA) ;
    une lame de coupe en forme de disque (9) qui est montée sur la tête de coupe (5), tourne autour d'un axe de rotation (B-B) et est animée d'un mouvement cyclique pour couper les rouleaux (L);
    deux roues de meulage (32, 34) qui sont agencées et configurées pour meuler deux côtés d'un bord de coupe (9B) de la lame de coupe en forme de disque (9), et dont chacune tourne autour de son propre axe de rotation (C-C ; D-D) ;
    dans laquelle les roues de meulage (32, 34) sont montées folles et entraînées en rotation par friction avec la lame de coupe en forme de disque (9) ;
    caractérisée en ce que les roues de meulage (32, 34) sont agencées par rapport à la lame de coupe de forme de disque (9) de telle manière que, dans une zone de contact (Z32, Z34) entre chaque roue de meulage (32, 34) et la lame de coupe en forme de disque (9), la roue de meulage (32 ; 34) a une vitesse orientée vers l'intérieur du bord de coupe ; les roues de meulage (32, 34) sont agencées par rapport à la lame de coupe en forme de disque (9) de telle sorte que les zones de contact (Z32, Z34) entre les roues de meulage (32, 34) et la lame de coupe en forme de disque (9) soient agencées entre deux plans (P32 ; P34) dont chacun contient l'axe de rotation (C-C, D-D) de l'une des roues de meulage respective (32, 34) ; lesdits plans sont approximativement parallèles l'un à l'autre et à un autre plan (P) contenant l'axe de rotation (B-B) de la lame de coupe en forme de disque (9), ledit plan contenant l'axe de rotation (B-B) de la lame de coupe en forme de disque (9) étant agencé entre les deux plans (P32, P34) contenant les axes de rotation (C-C ; D-D) des roues de meulage (32, 34).
  2. Machine de sciage selon la revendication 1, dans laquelle les zones de contact (Z32, Z34) sont symétriques par rapport à un plan (P) sensiblement orthogonal à la lame de coupe en forme de disque (9) et contenant l'axe de rotation (B-B) de la lame de coupe en forme de disque (9).
  3. Machine de sciage (1) selon la revendication 1 ou 2, dans laquelle, lorsque les deux roues de meulage (32, 34) sont dans une position opérationnelle en contact avec la lame de coupe en forme de disque (9), une première (32) desdites deux roues de meulage (32, 34) est agencées avec son axe de rotation (C-C) à l'extérieur du bord de coupe (9B) de la lame de coupe en forme de disque (9), et l'autre (34) desdites deux roues de meulage (32, 34) est agencée avec son axe de rotation (D-D) à l'intérieur du bord de coupe (9B) de manière à intersecter la lame de coupe en forme de disque (9).
  4. Machine de sciage (1) selon l'une ou plusieurs des revendications précédentes, dans laquelle lesdites deux roues de meulage (32, 34) sont supportées par deux supports respectifs (36, 38) qui sont agencées du même côté d'un plan médian (T) de la lame circulaire, sur lequel le bord de coupe (9B) de la lame de coupe en forme de disque (9) est agencé.
  5. Un procédé de meulage d'une lame de coupe en forme de disque (9) d'une machine de sciage (1) pour couper des rouleaux (L) de matériau en bande, le procédé comprenant les étapes consistant à :
    - mettre une première roue de meulage (32) en contact avec un premier côté d'un bord de coupe (9B) de la lame de coupe en forme de disque (9) dans une première zone de contact (Z32) ;
    - mettre une seconde roue de meulage (34) en contact avec un second côté du bord de coupe (9B) de la lame de coupe en forme de disque (9) dans une seconde zone de contact (Z34) ;
    - positionner la première zone de contact (Z32) et la seconde zone de contact (Z34) entre un premier plan (P32) contenant l'axe de rotation (C-C) de la première toue de meulage (32), et un second plan (P34) contenant l'axe de rotation (D-D) de la seconde roue de meulage (34), ledit premier plan (P32) et ledit second plan (P34) étant approximativement parallèles l'un à l'autre et approximativement parallèles à un autre plan (P) contenant l'axe de rotation (B-B) de la lame de coupe en forme de disque (9) et agencé entre le premier plan (P32) et le second plan (P34) ;
    - faire tourner la première roue de meulage (32) et la seconde roue de meulage (34) en friction entre la lame de coupe en forme de disque (9) et ladite première roue de meulage (32) et ladite seconde roue de meulage (34), autour d'axes de rotation respectifs (C-C, D-D) dans un sens tel que, dans chacune des première zone de contact (Z32) et seconde zone de contact (Z34), la première roue de meulage (32) et la seconde roue de meulage (34) ont une vitesse de rotation respective orientée vers l'intérieur du bord de coupe (9B).
  6. Procédé selon l'une ou plusieurs des revendications 5, dans lequel la première zone de contact (Z32) et la seconde zone de contact (Z34) sont symétriques par rapport à un plan (P) sensiblement orthogonal à la lame de coupe en forme de disque (9) et contenant l'axe de rotation (B-B) de la lame de coupe en forme de disque (9).
  7. Procédé selon l'une ou plusieurs des revendications 5 à 6, dans lequel la première roue de meulage (32) est agencée avec son axe de rotation (C-C) à l'extérieur du bord de coupe (9B) de la lame de coupe en forme de disque (9) et la seconde roue de meulage (34) est agencée avec son axe de rotation (D-D) à l'intérieur du bord de coupe (9B) de manière à intersecter la lame de coupe en forme de disque.
  8. Procédé selon l'une ou plusieurs des revendications 5 à 7, dans lequel la première roue de meulage (32) et la seconde roue de meulage (34) sont supportées par deux supports respectifs (36, 38) qui sont agencés du même côté d'un plan médian (T) de la lame circulaire, sur lequel le bord de coupe (9B) de la lame de coupe en forme de disque (9) est agencé.
EP17718877.8A 2016-04-27 2017-04-14 Machine de sciage de rouleaux comprenant des meules et procédé de meulage Active EP3448644B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITUA2016A002916A ITUA20162916A1 (it) 2016-04-27 2016-04-27 Macchina troncatrice di rotoli con mole di affilatura e metodo di affilatura
PCT/EP2017/059053 WO2017186520A1 (fr) 2016-04-27 2017-04-14 Machine de sciage de grumes comprenant des meules et procédé de broyage

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EP3448644B1 true EP3448644B1 (fr) 2020-02-12

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CN (1) CN109311177A (fr)
BR (1) BR112018071770A2 (fr)
ES (1) ES2788683T3 (fr)
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IT201900008490A1 (it) * 2019-06-10 2020-12-10 Futura Spa Macchina troncatrice.
US20220379511A1 (en) 2019-10-03 2022-12-01 Korber Tissue S.p.A. Cutting machine for products made of cellulose material and related method
CN110744731B (zh) * 2019-10-30 2021-07-27 许昌学院 一种基于光电控制的晶片切片设备
CN112296845B (zh) * 2020-09-27 2022-03-11 靖州县靖友木业有限公司 一种木材加工用的定位裁切收集一体化设备及其使用方法

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GB8504498D0 (en) * 1985-02-21 1985-03-27 Molins Plc Cutting cigarettes
IT1247330B (it) 1991-04-03 1994-12-12 Perini Fabio Spa Macchina troncatrice per il taglio di rotoli di materiale nastriforme.
US6261161B1 (en) * 1999-01-06 2001-07-17 Premark Feg L.L.C. Sharpener assembly for a food slicer and related method
IT1308313B1 (it) 1999-11-17 2001-12-10 Perini Fabio Spa Dispositivo di affilatura per utensili ruotanti di taglio e macchinaimpiegante detto dispositivo.
ITFI20020123A1 (it) * 2002-07-09 2004-01-09 Perini Fabio Spa Macchina troncatrice per tagliare prodotti allungati
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
ITFI20020207A1 (it) 2002-10-30 2004-04-30 Perini Fabio Spa Gruppo di affilatura e macchina troncatrice comprendente almeno una lama e detto gruppo di affilatura
KR101469628B1 (ko) 2014-07-01 2014-12-10 강선영 보행 보조기

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ITUA20162916A1 (it) 2017-10-27
CN109311177A (zh) 2019-02-05
ES2788683T3 (es) 2020-10-22
BR112018071770A2 (pt) 2019-02-19
WO2017186520A1 (fr) 2017-11-02

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