WO2004039544A1 - Sharpening unit and cutting machine comprising at least one blade and said sharpening unit - Google Patents
Sharpening unit and cutting machine comprising at least one blade and said sharpening unit Download PDFInfo
- Publication number
- WO2004039544A1 WO2004039544A1 PCT/IT2003/000662 IT0300662W WO2004039544A1 WO 2004039544 A1 WO2004039544 A1 WO 2004039544A1 IT 0300662 W IT0300662 W IT 0300662W WO 2004039544 A1 WO2004039544 A1 WO 2004039544A1
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- WIPO (PCT)
- Prior art keywords
- blade
- unit
- grinding wheel
- sharpening
- axis
- Prior art date
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- 230000010355 oscillation Effects 0.000 claims description 30
- 230000007246 mechanism Effects 0.000 claims description 8
- 229910018173 Al—Al Inorganic materials 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 230000002427 irreversible effect Effects 0.000 claims description 2
- 230000007423 decrease Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003534 oscillatory effect Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
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- 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
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- 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
- Sharpening unit and cutting machine comprising at least one blade and said sharpening unit
- the present invention relates to a cutting machine for cutting elongated products, such as and in particular logs of web material for the production of small rolls destined for packaging and sale.
- the invention relates to a cutting machine with at least a cutting blade and at least a sharpening unit associated with said cutting blade.
- the invention also relates to a sharpening unit for cutting machines or other machines provided with a blade that must be constantly or periodically sharpened.
- rolls or logs of substantial axial length are produced by winding a predetermined quantity of paper, for example tissue paper, to subsequently produce small rolls of toilet tissue, kitchen towels and the like.
- the logs are cut orthogonal to their axis and divided into a plurality of small rolls of a suitable length, which are then packaged for distribution and sale.
- the logs are cut by means of special "cutting" machines, which have one or more cutting blades and one or more sharpening units for each blade. Analogous requirements are found in other technological sectors, where it is necessary to cut an elongated product into smaller portions, in particular logs of wound web material.
- US-A-3,213,731 describes a cutting machine for logs of web material, wherein a disk-shaped blade rotates about its axis supported by a unit in turn rotating about a principal axis parallel to the direction of feed of the logs to be cut, which are fed along a feed path towards the cutting area.
- EP-A-507750 describes a cutting machine wherein the rotating unit carrying the disk-shaped blade(s) is provided with alternate translatory movement to allow the logs to be cut to move forwards with continuous movement.
- the feed speed of the logs is variable and not constant, to obtain a series of advantages in terms of flexibility and reduction in stresses and in the overall dimensions of the machine.
- a sharpening unit is provided, with two grinding wheels to restore the cutting edge of the blades
- EP-A-609668 describes a cutting machine with a rotating unit carrying two disk- shaped blades rotating about respective axes parallel to the logs to be cut, but skew in respect of the axis of rotation of the rotating unit. The logs are fed at a variable speed as in EP-A-507750 to obtain the same advantages of flexibility.
- EP-A-0555190 describes a cutting machine with a helical cutting blade and a sharpening unit with two grinding wheels.
- US-A-5,038,647 describes a cutting machine that uses a band blade rather than a disk-shaped blade, particularly suitable for cutting rolls with a large diameter.
- Two sharpening units with different functions are associated with the blade.
- a first sharpening unit, with motorized grinding wheels, produces and sharpens the principal bevel of the blade, while a second unit with idle grinding wheels keeps a counter-bevel or secondary bevel sharpened.
- WO-A-0136151 describes a sharpening unit for the blade of a cutting machine, with tools to dress the grmding wheels.
- the grinding wheels are carried by a grinding wheel unit that is gradually moved towards the blade to be sharpened in order to offset the reduction in diameter (in the case of disk-shaped or helical blades) or in width (in the case of band blades) due to wear caused by repeated sharpening operations.
- the movement towards the blade is set by the operator normally as a function of the number of sharpenings performed on the blade.
- the grinding wheel unit is moved towards the blade by a predetermined extent after a predefined number of sharpening operations, assuming that this corresponds to a wear and thus a reduction in the dimension of the blade that are always constant.
- the movement towards the blade is calculated so that contact is always guaranteed with sufficient pressure of the grinding wheel on the blade, even if there should accidentally be more wear than expected. This means that there is often more pressure of the grinding wheels on the blade than necessary and consequently also excessive wear on the blade. On the contrary, there may be insufficient sharpening pressure, caused by the blade and the grinding wheels not having been moved close enough together. In this case sharpening is not performed efficaciously. Moreover, due to the rigidity of the grinding wheel unit the pressure with which the two grinding wheels operate on the two sides of the blade is not equal, due to unavoidable errors in positioning, tolerances and any uneven wear on the grinding wheels. Objects and summary of the invention The object of the present invention is to provide a sharpening unit, in particular although not exclusively for cutting machines to cut elongated products, which allows more efficient sharpening in respect of prior art sharpening units.
- Another object of the invention is to provide a cutting machine to cut products, especially although not exclusively logs of web material, comprising at least one particularly efficient sharpening unit and which on the one hand sharpens the blades accurately and on the other causes limited wear on the blade(s).
- a sharpening unit comprising a grinding wheel unit with at least two opposed grinding wheels to act on two sides of a blade, characterized in that said grinding wheel unit is equipped with at least a degree of freedom to center the grinding wheels in respect of a lying surface of the portion of the cutting edge of the blade on which the grinding wheels act.
- the blade can be a flat disk-shaped blade, in which case centering is performed in practice in respect of a lying plane of the cutting edge.
- the blade can also have other forms, for example it can extend helically with a corresponding helical form of the cutting edge. In this case centering of the two grinding wheels takes place in respect of the lying surface of the portion of cutting edge or cutting bevel of the blade on which the grinding wheels are temporarily acting and this surface can vary according to the position of the grinding wheels along the blade.
- the lying surface of the cutting edge, in respect of which the grinding wheels are centered is a plane parallel to the portion of the band forming the blade on which the area of the cutting edge is found that is instantaneously sharpened.
- a further aspect of the present invention relates to a cutting machine for cutting elongated products, comprising: at least one path for the products to be cut; at least one device to feed the products along said path; at least one blade provided with a cutting movement to cut said products; at least one sharpening unit for said blade, which comprises a grinding wheel unit with at least two opposed grinding wheels to act on two sides of said blade.
- the machine is characterized in that the grinding wheel unit is provided with at least a degree of freedom to center the grinding wheels in respect of a lying surface of the portion of the cutting edge, that is of the cutting bevel of the blade on which the grinding wheels act.
- the grinding wheel unit can be taken to a fixed position in respect of the blade, when the dimensions of the latter vary slightly due to wear and said wear can be recovered for example by moving the grinding wheels towards the blade without also moving the grinding wheel unit. Nonetheless, the sharpening unit normally comprises a system to move the grinding wheel unit towards the blade along a direction of forward movement, to recover wear on the blade. In this case, self-centering of the grinding wheels is particularly important and advantageous as it prevents the onset of excessive sharpening pressures, or - on the contrary - conditions of insufficient pressure and thus insufficient sharpening. According to a particular embodiment, the grinding wheel unit is provided with a further degree of freedom, partly restricted, to center the grinding wheels in respect of the blade.
- Partly restricted degree of freedom is intended as possible movement restricted, for example, through the effect of a return spring and/or an actuator that limits the freedom of movement of the grinding wheel unit according to this degree of freedom.
- the grinding wheel unit is free to move in one direction ⁇ but its movement is limited in the other direction, or the movement is contrasted by a return spring. This guarantees that the movement according to this further degree of freedom always brings the grinding wheels into contact with the blade to be sharpened, preventing movement away from the cutting edge.
- this second degree of limited or restricted freedom is represented by the fact that the grinding wheel unit can rotate or oscillate about an axis of oscillation.
- the grinding wheel unit revolves about an axis of oscillation disposed generically in an intermediate position between the axes of rotation of the grinding wheels and in substance lying on the lying plane of the portion of cutting edge on which the grinding wheels acts.
- the axis of oscillation can lie on a plane that approximates the lying surface of said portion of cutting edge.
- the grinding wheels are generally disposed with their respective axes of rotation skew.
- the axis of oscillation of the grinding wheel is advantageously disposed in a position of minimum distance between said axes of rotation.
- the axis of oscillation can also be the axis of symmetry of the grinding wheels, i.e. these are disposed in a substantially symmetrical way in respect of the axis of oscillation.
- the movement of the grinding wheel unit about the axis of oscillation must be restricted, so that the grinding wheels are effectively stressed to come into contact with the blade to be sharpened, rather than tending to move to a non-operating position.
- an elastic return element, an actuator element or another device or means , to control the pressure may be provided with which the grinding wheels are pushed against the blade.
- oscillation of the grinding wheel unit represents a further degree of freedom in the movement of the grinding wheel unit, although this movement is not strictly completely free, but restricted so that it takes place in the direction that brings the grinding wheels effectively into the operating position against the blade.
- the axis of oscillation of the grinding wheel unit may be essentially parallel to the direction of feed of the grinding wheel unit in respect of the blade and be essentially orthogonal to the direction of feed of the products to be cut towards the blade.
- the grinding wheel unit is free to translate along a direction of translation not parallel to the lying plane of the blade, to center the grinding wheel in respect of the lying plane, that is the median plane of the blade.
- the direction of translation is in practice essentially orthogonal to the lying plane of the blade and preferably approximately substantially parallel to the direction of feed of the products to be cut.
- the axis of oscillation of the grinding wheel unit is therefore advantageously orthogonal to the direction of translation of the unit.
- the grinding wheel unit has a first degree of freedom consisting in the fact that it can translate in the direction of translation, and a second degree of freedom consisting in the fact that it can oscillate about the axis of oscillation, the latter movement being limited or restricted in the manner and for the reasons explained above.
- the machine according to the invention may have one or more blades.
- a single sharpening unit or even more than one sharpening units may be associated with the blade or with each blade.
- the two or more sha ening units advantageously have different characteristics and functions.
- a first unit can have motorized grinding wheels to sharpen the principal bevel of the blade and the second can have idle grinding wheels to sharpen the counter-bevel of the blade.
- the grinding wheels of the two units can typically have different inclinations.
- One blade that has two sharpening units to sharpen bevel and counter-bevel (or secondary bevel) is described in US-A-5,038,647.
- Figure 1 shows a schematic side view of a cutting machine for cutting rolls of web material, with a rotating unit carrying a disk-shaped blade, to which a sharpening unit according to the present invention is applied;
- Figure 2 shows a front view and partial section of the sharpening unit in a first embodiment, according to II-II in Figures 1 and 3;
- Figure 3 shows a side view and partial section according to HI-HI in Figure 2;
- Figure 4 shows a plan view according to IN-1N in Figure 2;
- Figure 5 shows a partial side view of a sharpening unit in a different embodiment
- Figure 6 shows a plan view according to NI-VI in Figure 5;
- Figure 7 shows a section according to NII-NII in Figure 5. Detailed description of the preferred embodiments of the invention
- FIG 1 schematically shows a cutting machine according to the present invention.
- a cutting machine for rolls of paper or other wound web material, wherein the cut is performed by a disk-shaped blade rotating about its axis, carried by a unit in turn rotating about a principal axis of rotation, parallel or approximately parallel to the direction of feed of the rolls to be cut.
- a sharpening unit of the type shown in Figures 5 to 7 with motorized grinding wheels is applied to a machine of this type.
- a sharpening unit with idle grinding wheels of the type shown in Figures 2 to 4, may be applied (if need be in combination with or alternatively to it).
- the sharpening units which shall be described hereunder with particular reference to Figures 2 to 7, may also be applied to different machines, such as cutting machines with a helical blade or with a band blade. It must therefore be understood that the machine shown in Figure 1 must be intended purely as an example of a possible machine to which sharpening units according to the present invention may be applied.
- FIG. 1 schematically shows (limited to its front part) the cutting machine as a whole, indicated with 1.
- the machine has a feed path of the logs to be cut, indicated with L, which are pushed by pushers 3 secured to a flexible chain element or the like 5, driven about driving wheels supported by a fixed structure 7. Only one driving wheel, indicated with 9, is visible in Figure 1, while the other is at the rear end of the cutting machine, not shown.
- the flexible elements 5 associated with the various parallel feed channels of the logs may be motorized separately from one another to stagger the movement of logs in each feed channel.
- the number 11 generically indicates a cutting head that by means of a support 13 carries a rotating unit 17.
- the unit 17 rotates about a horizontal axis A-A parallel to the direction fL of feed of the logs L.
- a disk-shaped blade 19 is mounted on the rotating unit 17, rotating about its own axis of rotation B-B parallel to the axis A-A and to the direction of feed fL of the logs L.
- Two or more disk-shaped blades rotating about their axes of rotation distributed about the axis A-A may be provided on the rotating unit 17.
- the rotating unit 17 can be equipped with an alternate translatory movement parallel to the direction fL, or the blade 19 can be provided individually with this movement and in this case translate in respect of the unit 17. In either of these cases the logs may be fed with continuous rather than intermittent movement.
- the number 21 indicates a motor that, by means of a belt 23, transmits rotatory motion to the rotating unit 17.
- a second motor 25 is positioned on the support 13 of the rotating unit 17 and, by means of a belt 27, supplies rotatory motion to a shaft that drives the rotating disk-shaped blade 19 in rotation.
- a tnird motor 29 drives the guiding wheel 9 of the continuous flexible element 5 in rotation.
- a guiding wheel 9 may be associated with each channel, with its own motor unit 29 suitably controlled as a function of the angular position of the rotating unit 17.
- the number 35 indicates a programmable control unit that synchronizes the forward movement of the flexible element(s) 5 through the motor(s) 29 with the angular position of the rotating unit 17 driven in rotation by the motor 21.
- a sharpening unit generically indicated with 50 is disposed on the rotating unit 17, to sharpen the blade 19.
- the sharpening unit 50 has two grinding wheels 51 and 53, which act on two sides of the cutting edge of the blade 19.
- FIGS 2 to 4 show a first embodiment of the sharpening unit 50.
- idle grinding wheels are used, which are drawn in rotation through the effect of the frictional force exerted during contact between each grinding wheel and the blade 19.
- the sharpening unit 50 has a pair of plates 55, 57 secured to the rotating unit 17 (or to another part of the cutting machine if this does not have a rotating unit, for example to the supporting frame of a band blade). Between the two plates 55, 57 bars 59 with a circular section extend to form sliding guides for the same number of bushings 61.
- the bushings are integral with a carriage indicated as a whole with 63.
- the carriage 63 moves along the guides formed by the bars 59 according to the arrow f63 to move gradually against the axis B-B of the blade 19, in order to hold the grinding wheels in the operating position offsetting the decrease in dimension of the blade 19 due to wear caused by sharpening.
- Movement of the carriage 63 according to the arrow f63 is controlled by a free wheel mechanism 65 keyed on a threaded bar 67 parallel to the guide bars 59.
- a nut screw 69 integral with the carriage 63 engages with the threaded bar 67.
- Rotation of the free wheel mechanism 65 is controlled by a piston-cylinder actuator 71 with a short stroke that acts on a bracket 73 integral with the free wheel mechanism 65.
- the number 75 indicates a return spring of the bracket 73.
- Each stroke to extend the actuator 71 causes the threaded bar 67 to rotate by an angular step and therefore a forward movement by a controlled extent in the direction of the arrow f63 of the carriage 63.
- a cantilevered bracket 77 is integral with the carriage 63 and supports a pair of guides 79 essentially parallel to the axis B-B of the blade 19 and essentially orthogonal to the direction f63 of translation of the carriage 63.
- a slide 81 that supports a grinding wheel unit 80 is free to translate along the guides 79.
- a shaft 85 is supported idle by bearings 83 inside the slide (see in particular Figure 2). The shaft 85 is free to rotate about its axis C-C, parallel to the axis of the threaded bar 67 and therefore to the direction f63 in which the carriage 63 and the sharpening grinding wheels move against the blade 19.
- a plate 87 Fixed to the bottom of the shaft 85 is a plate 87 that carries integrally secured to it two blocks 89 supporting the grinding wheels 51, 53. As shown in particular in Figure 3 for the grinding wheel 53, the grinding wheels are carried by spindles 91 supported idle by bearings 93 in the blocks 89. Rotation of the grinding wheels is produced by the frictional force between them and the sides of the blade 19.
- the plate 87 carried by the shaft 85 is elastically stressed in a predetermined angular position (defined by a stop schematically indicated in Figure 2 with 88) by a pulling spring 95, the ends of which are fixed on one side to the plate 87 and on the other to a suitable point of the slide 81 (for example in the point 90 indicated in Figure 3).
- the spring 95 could be fastened to a fixed point in respect of the bracket 77. Coupling to the slide 87 is preferable as in this case the stress of the spring does not tend to produce flexure of the blade.
- the grinding wheel unit 80 is provided with a degree of freedom along the direction of translation f81 and with a degree of freedom (limited by the presence of the pulling springs 95) constituted by the fact that the plate 87 can rotate.
- the grinding wheels 51, 53 integral with the grinding wheel unit 80 are thus provided with a double movement that allows them to be centered in respect of the lying plane of the blade 19, that is the median plane of the blade, or in any case the lying plane of the cutting bevel.
- the first movement is a movement according to the guides 79 in a direction orthogonal to the lying plane of the blade and, therefore, in the layout of the machine in Figure 1, parallel to the direction fL of feed of the products L to be cut.
- the second movement is an oscillatory movement about the axis C-C orthogonal to the axis B-B of the blade, and therefore to the direction of feed of the products.
- the axis C-C lies on the median plane of the blade, or more generically on the lying plane of the cutting edge of the blade, in an intermediate position between the two grinding wheels 51, 53. More specifically, the axis C-C is in a barycentric position in respect of the axes Al-Al and A2, A2 of the two grinding wheels 51, 53.
- the grinding wheels can be centered on the blade 19 and the pressure they exert on the blade can be controlled to prevent excessive pressure.
- the grinding wheels 51, 53 react against the blade 19 which wedges in the space between the grinding wheels. Being free to translate with the slide 81 and the plate 87 along the guides 79 according to the arrow f81, this movement takes the grinding wheels 51, 53 to a position that is centered at all times in respect of the centerline plane of the blade.
- the fact that the grinding wheel unit can rotate the grinding wheels 51, 53 about the axis C-C means that the two grinding wheels exert on the blade the same pressure, determined by the force of the pulling spring 95.
- the draw spring 95 extends by a very short extent as a result of the modest oscillations of the grinding wheels about the axis C-C, it may be considered that its traction force is essentially constant and therefore the pressure exerted by the grinding wheels on the blade will also be essentially constant, irrespective of extent of the angle of oscillation about the axis C-C.
- a position sensor may also be provided to detect the angular position of the plate 87 and of the grinding wheels 51, 53 to control forward movement of the grinding wheel unit 80 as a function of the wear on the blade.
- the decrease in diameter is offset with rotation of the plate 87 and therefore of the grinding wheels 51, 53 about the axis C-C. Offset can be obtained up to a certain point, beyond which the plate 87 meets the stop 88.
- a counterweight can be secured to the slide 81 and restricted to move along the direction of the guides in the opposite direction to the direction in which the grinding- wheel unit 80 and the slide 81 move.
- This arrangement is indicated with a dashed line and schematically in Figure 3.
- the counterweight is indicated with 101. It is guided along guides parallel to the guides 79 and not shown and linked by a pinion 103 to a rack 105 integral with the slide 81.
- the pinion supported idle about a fixed axis in respect of the structure 77, also meshes with a rack not shown integral with the counterweight 101. In this way the inertia! forces applied simultaneously to the counterweight 101 and to the assembly comprising the grinding wheel unit 80 and the slide 81 cause no translation of these elements along the direction f81.
- the grinding wheel unit 80 is dimensioned and balanced so that its center of gravity falls on the axis C-C, or at least so that the center of gravity of the elements free to rotate about this axis, namely the shaft 85, the blocks 89, the plate 87 and the grinding wheels 51, 53, falls on it.
- the device described with reference to Figures 2 to 4 is particularly suitable to produce a counter-bevel on the blade 19 or the like, for example a band blade.
- the sharpening unit in question will be associated with another sharpening unit that produces the principal bevel.
- This further sharpening unit may be produced in the same way as described, or as shown in the example of embodiment in Figures 5 to 7. This further embodiment may be also adopted to produce a single sharpening unit to sharpen blades without a . counter-bevel.
- Figures 5 to 7 do not show the system to move the grinding wheels towards the blade, which may be produced as in the previous example.
- Equivalent numbers increased by 200 indicate equivalent or corresponding parts to those in the previous example of embodiment.
- the number 277 indicates the cantilevered bracket that supports the slide 281 carrying the grinding wheel unit 280.
- the slide 281 carrying the grinding wheel unit 280 translates freely along guides 279 orthogonal to the lying plane of the blade, indicated once more with 19, and therefore parallel to its axis of rotation B-B.
- the slide 281 supports rotatingly about the axis C-C the shaft of the grinding wheel unit 280 on which a plate 287 is fixed, integral with which are blocks 289 carrying the grinding wheels indicated with 251 and 253.
- the grinding wheels are motorized and the number 254 indicates the respective motors that can be, in a per se known way, pneumatic motors or the like.
- the axis C-C is again on the lying plane of the cutting edge of the blade and in a central position in respect of the axes Al-Al and A2-A2 of the two grinding wheels 251, 253.
- the oscillations of the blade can stress the grinding wheels 251, 253 making them oscillate about the axis C-C moving them away from the blade. This may occur due to the considerable flexural deformations to which the blade 19 may be subjected. This would cause vibrations and defects in sharpening.
- a device indicated as a whole with 350 and described hereunder, is associated with the grinding wheel unit 280.
- the device 350 comprises a slider 351 housed in a support 353 made integral (for example through a bracket not shown for clarity of the drawing) with the slide 281.
- the back end of the slider 351 is secured by means of a bracket 355 to a piston-cylinder actuator 357, in turn secured to the support 353.
- Extension and retraction of the piston- cylinder actuator 357 causes rotation of the slider 351 about its axis D-D.
- the slider 351 has a front rod 351 A that cooperates with an appendix 359 integral with the plate 287.
- the slider 351 has a channel 361 (see in particular Figure 7) that extends along a short arc of helix coaxial with the axis D-D of the slider 351.
- the channel 361 and the roller 363 form a cam mechanism that obliges the slider 351 to move along the axis D- D when the actuator 357 causes a rotation of the slider about said axis.
- An axial thrust on the slider 351 does not cause an axial movement due to inclination of the channel 361, chosen so that the mechanism is irreversible.
- the grinding wheels 251, 253 are required to operate, they are first moved against or towards the blade 19 by the forward movement device not shown that produces a movement according to f63.
- the blade 19 is inserted into the space between the grinding wheels 251 , 253.
- the grinding wheels may not be in contact with the blade 19. They are pushed and forced into the operating position with the required pressure against the sides of the blade 19 by extension of the piston-cylinder actuator 357 that brings the slider 351 into a predetermined position corresponding to an angular position of the plate 287 and of the blocks 289 and therefore of the grinding wheels 351, 353 in respect of the axis C-C.
- This position is maintained even if flexural deformations of the blade 19 exert an axial force on the cursor 351, thanks to the irreversibility of the cam mechanism 361, 363.
- the movement of oscillation about the axis C-C produced by extension of the actuator 357 produces translation of the slide 281 along the direction £281 to bring the axis C-C to the lying plane, i.e. to the centerline of the blade 19. Therefore, also in this case the grinding wheels system is self-centering in respect of the blade.
- the grinding wheels remain locked in their angular position in respect of the axis C-C to press with the due pressure against the blade 19 until the actuator 357 is operated again in the opposite direction to allow oscillation of the grinding wheels about the axis C- C and move them away from the sides of the blade 19, bringing them finally to a non- operating position.
- Oscillation can be controlled by a return spring, not shown.
- This second example of embodiment may also be provided with systems, analogous to those described with reference to Figures 2 to 5, to prevent the effect of inertia on the grinding wheels.
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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)
- Grinding-Machine Dressing And Accessory Apparatuses (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2003283813A AU2003283813A1 (en) | 2002-10-30 | 2003-10-27 | Sharpening unit and cutting machine comprising at least one blade and said sharpening unit |
US10/533,233 US20060011015A1 (en) | 2002-10-30 | 2003-10-27 | Sharpening unit and cutting machine comprising at least one blade and said sharpening unit |
JP2004547974A JP2006504539A (en) | 2002-10-30 | 2003-10-27 | A polishing unit, at least one blade, and a cutting machine having the polishing unit |
BR0315737-7A BR0315737A (en) | 2002-10-30 | 2003-10-27 | Sharpening unit and cutting machine comprising at least one blade and said sharpening unit |
EP03775794A EP1556194A1 (en) | 2002-10-30 | 2003-10-27 | Sharpening unit and cutting machine comprising at least one blade and said sharpening unit |
CA002503788A CA2503788A1 (en) | 2002-10-30 | 2003-10-27 | Sharpening unit and cutting machine comprising at least one blade and said sharpening unit |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITFI2002A000207 | 2002-10-30 | ||
IT000207A ITFI20020207A1 (en) | 2002-10-30 | 2002-10-30 | SHARPENING GROUP AND CUTTING MACHINE INCLUDING AT LEAST ONE BLADE AND SAID SHARPENING GROUP |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004039544A1 true WO2004039544A1 (en) | 2004-05-13 |
Family
ID=32211382
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IT2003/000662 WO2004039544A1 (en) | 2002-10-30 | 2003-10-27 | Sharpening unit and cutting machine comprising at least one blade and said sharpening unit |
Country Status (10)
Country | Link |
---|---|
US (1) | US20060011015A1 (en) |
EP (1) | EP1556194A1 (en) |
JP (1) | JP2006504539A (en) |
KR (1) | KR20050062652A (en) |
CN (1) | CN1708380A (en) |
AU (1) | AU2003283813A1 (en) |
BR (1) | BR0315737A (en) |
CA (1) | CA2503788A1 (en) |
IT (1) | ITFI20020207A1 (en) |
WO (1) | WO2004039544A1 (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2006126229A1 (en) * | 2005-05-27 | 2006-11-30 | Fabio Perini S.P.A. | Cutting machine to cut rolls or logs of web material and relative method |
WO2007097724A2 (en) * | 2006-02-24 | 2007-08-30 | Lms Makina Sanayi Ve Ticaret Limited Sirketi | Technique for automatic sharpening of cleaning paper cutting machine |
WO2014084120A1 (en) * | 2012-11-30 | 2014-06-05 | 三菱重工業株式会社 | Cutting apparatus for composite material |
WO2014140191A1 (en) * | 2013-03-15 | 2014-09-18 | Sca Hygiene Products Ab | Blade honing apparatus and cutting apparatus incorporating same |
EP2921256A1 (en) | 2014-03-19 | 2015-09-23 | Universal Tissue Technology S.R.L. | Cutting machine with grinding unit |
US9597764B2 (en) | 2013-09-09 | 2017-03-21 | Universal Tissue Technology | Cutting machine with grinding unit |
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Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0528122A1 (en) * | 1991-08-19 | 1993-02-24 | Paper Converting Machine Company | Apparatus and method for sharpening disc blades |
EP0555190A2 (en) * | 1992-02-07 | 1993-08-11 | FABIO PERINI S.p.A. | Method and machine for cutting rolls of paper and the like |
EP0585927A2 (en) * | 1992-09-04 | 1994-03-09 | Mitsubishi Jukogyo Kabushiki Kaisha | Disc-shaped knife rotary cutter |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3213731A (en) * | 1964-08-04 | 1965-10-26 | John J Renard | Paper log cutting apparatus |
USRE30598E (en) * | 1979-02-14 | 1981-05-05 | Paper Converting Machine Company | Method for transverse cutting |
US4584917A (en) * | 1984-12-06 | 1986-04-29 | Paper Converting Machine Company | Automatic blade diameter compensation for log saws |
IT1233279B (en) * | 1989-04-05 | 1992-03-26 | Perini Finanziaria Spa | CUTTING MACHINE FOR CUTTING STICKS OF PAPER AND SIMILAR MATERIAL |
JPH0741603B2 (en) * | 1992-06-09 | 1995-05-10 | 株式会社太平製作所 | Long blade for woodworking, grinding method and device therefor |
DE19855421C2 (en) * | 1998-11-02 | 2001-09-20 | Alcove Surfaces Gmbh | Implant |
US6224468B1 (en) * | 1999-07-15 | 2001-05-01 | Paper Converting Machine Company | Apparatus and method for sharpening a disc blade |
-
2002
- 2002-10-30 IT IT000207A patent/ITFI20020207A1/en unknown
-
2003
- 2003-10-27 BR BR0315737-7A patent/BR0315737A/en not_active Application Discontinuation
- 2003-10-27 AU AU2003283813A patent/AU2003283813A1/en not_active Abandoned
- 2003-10-27 US US10/533,233 patent/US20060011015A1/en not_active Abandoned
- 2003-10-27 WO PCT/IT2003/000662 patent/WO2004039544A1/en active Application Filing
- 2003-10-27 CA CA002503788A patent/CA2503788A1/en not_active Abandoned
- 2003-10-27 CN CNA2003801023797A patent/CN1708380A/en active Pending
- 2003-10-27 KR KR1020057007710A patent/KR20050062652A/en not_active Application Discontinuation
- 2003-10-27 EP EP03775794A patent/EP1556194A1/en not_active Withdrawn
- 2003-10-27 JP JP2004547974A patent/JP2006504539A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0528122A1 (en) * | 1991-08-19 | 1993-02-24 | Paper Converting Machine Company | Apparatus and method for sharpening disc blades |
EP0555190A2 (en) * | 1992-02-07 | 1993-08-11 | FABIO PERINI S.p.A. | Method and machine for cutting rolls of paper and the like |
EP0585927A2 (en) * | 1992-09-04 | 1994-03-09 | Mitsubishi Jukogyo Kabushiki Kaisha | Disc-shaped knife rotary cutter |
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WO2007097724A2 (en) * | 2006-02-24 | 2007-08-30 | Lms Makina Sanayi Ve Ticaret Limited Sirketi | Technique for automatic sharpening of cleaning paper cutting machine |
WO2007097724A3 (en) * | 2006-02-24 | 2007-10-04 | Lms Makina Sanayi Ve Ticaret L | Technique for automatic sharpening of cleaning paper cutting machine |
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WO2014140191A1 (en) * | 2013-03-15 | 2014-09-18 | Sca Hygiene Products Ab | Blade honing apparatus and cutting apparatus incorporating same |
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US9597764B2 (en) | 2013-09-09 | 2017-03-21 | Universal Tissue Technology | Cutting machine with grinding unit |
EP2921256A1 (en) | 2014-03-19 | 2015-09-23 | Universal Tissue Technology S.R.L. | Cutting machine with grinding unit |
IT201900022044A1 (en) * | 2019-11-25 | 2021-05-25 | Futura Spa | Cutting-off machine for the transversal cutting of logs of paper material |
WO2021106020A1 (en) * | 2019-11-25 | 2021-06-03 | Futura S.P.A. | Cutting machine for transversely cutting logs of paper |
US11858161B2 (en) | 2019-11-25 | 2024-01-02 | Futura S.P.A. | Cutting machine for transversely cutting logs of paper material |
CN111438733A (en) * | 2020-04-18 | 2020-07-24 | 杨明清 | Cutting equipment for processing artware |
CN116765945A (en) * | 2023-08-23 | 2023-09-19 | 连云港双亚机械有限公司 | Polishing device for rotary cultivator rotary blade production |
CN116765945B (en) * | 2023-08-23 | 2023-12-19 | 连云港双亚机械有限公司 | Polishing device for rotary cultivator rotary blade production |
Also Published As
Publication number | Publication date |
---|---|
CN1708380A (en) | 2005-12-14 |
EP1556194A1 (en) | 2005-07-27 |
ITFI20020207A1 (en) | 2004-04-30 |
JP2006504539A (en) | 2006-02-09 |
CA2503788A1 (en) | 2004-05-13 |
AU2003283813A1 (en) | 2004-05-25 |
KR20050062652A (en) | 2005-06-23 |
BR0315737A (en) | 2005-09-06 |
US20060011015A1 (en) | 2006-01-19 |
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