EP2957184B1 - Appareil de réglage - Google Patents

Appareil de réglage Download PDF

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Publication number
EP2957184B1
EP2957184B1 EP15165015.7A EP15165015A EP2957184B1 EP 2957184 B1 EP2957184 B1 EP 2957184B1 EP 15165015 A EP15165015 A EP 15165015A EP 2957184 B1 EP2957184 B1 EP 2957184B1
Authority
EP
European Patent Office
Prior art keywords
diamond
position sensor
cutting machine
cutting face
tobacco
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.)
Active
Application number
EP15165015.7A
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German (de)
English (en)
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EP2957184A1 (fr
Inventor
Thomas White
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.)
Dickinson Legg Ltd
Original Assignee
Dickinson Legg Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dickinson Legg Ltd filed Critical Dickinson Legg Ltd
Priority to PL15165015T priority Critical patent/PL2957184T3/pl
Publication of EP2957184A1 publication Critical patent/EP2957184A1/fr
Application granted granted Critical
Publication of EP2957184B1 publication Critical patent/EP2957184B1/fr
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B3/00Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
    • B24B3/36Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades
    • B24B3/368Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades installed as an accessory on another machine
    • AHUMAN NECESSITIES
    • A24TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24BMANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B7/00Cutting tobacco
    • A24B7/04Cutting tobacco by machines with revolving knives
    • A24B7/08Cutting tobacco by machines with revolving knives with several knives which act one after the other
    • A24B7/12Cutting tobacco by machines with revolving knives with several knives which act one after the other with cutter axes transverse to the feeding direction
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B3/00Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
    • B24B3/36Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades
    • B24B3/363Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades of blades mounted on a turning drum
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B49/00Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
    • B24B49/18Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation taking regard of the presence of dressing tools
    • B24B49/186Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation taking regard of the presence of dressing tools taking regard of the wear of the dressing tools
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B53/00Devices or means for dressing or conditioning abrasive surfaces
    • B24B53/005Positioning devices for conditioning tools
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B53/00Devices or means for dressing or conditioning abrasive surfaces
    • B24B53/04Devices or means for dressing or conditioning abrasive surfaces of cylindrical or conical surfaces on abrasive tools or wheels
    • B24B53/047Devices or means for dressing or conditioning abrasive surfaces of cylindrical or conical surfaces on abrasive tools or wheels equipped with one or more diamonds
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26DCUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/08Means for treating work or cutting member to facilitate cutting
    • B26D7/12Means for treating work or cutting member to facilitate cutting by sharpening the cutting member
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26DCUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00Cutting 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
    • B26D1/01Cutting 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
    • B26D1/12Cutting 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
    • B26D1/14Cutting 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
    • B26D1/143Cutting 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 stationary axis
    • B26D1/1435Cutting 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 stationary axis for thin material, e.g. for sheets, strips or the like

Definitions

  • the present invention relates to an adjustment apparatus for adjusting the position of a diamond in a tobacco cutting machine and to a method of adjusting the position of a diamond in a tobacco cutting machine.
  • Cutting machines are known to be used in a number of different industries for processing a range of products such as paper, fabric, tobacco.
  • the product material to be cut can be laminate, fibrous or granular.
  • tobacco leaves are processed for cigarette manufacture in a primary tobacco process.
  • the laminate portions of the tobacco leaves are first compressed and then cut in a cutting machine to create tobacco particles suitable for cigarette manufacturers.
  • Cutting machines for tobacco leaves generally comprise on a rotatable drum assembly with a plurality of knives with projecting cutting edges that are orientated approximately tangential to the circumference of the drum.
  • Compressed tobacco material is extruded towards the knives on the rotating cutting drum, the knives cut the tobacco material into small pieces for subsequent use as a smoking material.
  • the cutting edges of the knives are blunted by the tobacco which is being cut.
  • the cutting machine further comprises a grinding wheel and edges of the knives are sharpened by the action of the grinding wheel which traverses to and fro in a direction parallel to the axis of rotation of the drum.
  • the projecting edges of the knives contact the surface of the grinding wheel as they pass it and are continually abraded. It is necessary to feed the knives outwardly from the drum either continuously or at frequent intervals to compensate for this abrasion and maintain the correct geometrical relationship between the edges of the knives and the extruded material being cut.
  • the grinding wheel is periodically dressed by passing it over a diamond that is often located at the end of its traverse motion near the edge of the rotating drum.
  • the diamond removes a thin layer from the grinding wheel (which commonly comprises bonding material and abrasive grit).
  • the diamond can be an industrial diamond pillar, comprising diamond threads or seams mounted within an aluminium support, or alternatively a conical pointed industrial diamond.
  • the diamond has a cutting face.
  • the dressing action of the diamond performs several functions:
  • the grinding wheel is gradually advanced in a radial direction either continuously or periodically to compensate for the material lost by the dressing action of the diamond. When the grinding wheel is spent, it is replaced with a new one.
  • the overall cutting performance of the cutting machine is greatly affected by the precision of the grinding process performed by the grindstone, particularly with regard to maintaining the correct clearance between the edges of the knives and the static mouth part of the machine. If the clearance is too great, then un-cut pieces of tobacco are pulled from the mouth. If the clearance is too small, there is a risk of mechanical collision between the knives and the static parts, with consequent risk of damage to the machine and loss of production.
  • the position of the diamond is therefore critical in maintaining the correct radial position of the grinding wheel relative to the cutting drum axis, which subsequently determines the radius of the knife edges from the drum axis and hence clearance between the edges and the static mouth part.
  • the diamond gradually wears and needs to be adjusted manually to maintain the correct clearance and cut quality. As the diamond wears, the clearance increases, so the quality of the cut tobacco material can deteriorate. Manual adjustment of the diamond is typically required every 24 - 48 hour of operation, and is a task for a skilled operator. If it is performed incorrectly there is a possibility that the clearance may be set too small, with consequent risk of damage to the machine.
  • the rotation of the rotatable drum and grinding stone in the cutting machine must first be stopped i.e. the machine must be turned off.
  • a stopper is extended or positioned manually proximal to the diamond and the diamond is raised by an operator until it contacts a feeler gauge held between the diamond and the stopper.
  • the diamond is then clamped in place by the operator, the stopper retracted and the cutting machine restarted.
  • the stopper provides the datum or reference point for the optimum position of the diamond hence the accuracy of the diamond adjustment is related to the accuracy of the position of the stopper and the skill of the operator.
  • WO 2005/053442 discloses a method of controlling a gap between knives of a cutting machine for organic plant materials, particularly tobacco materials, comprising a cutterhead with a drum of cutting knives and a transporting-compacting assembly with a lower knife, wherein signals from electric sensors are used for positioning the knives by means of servomechanisms, the signals being processed in a central control unit of the cutting machine.
  • DE 29 32 629 A1 discloses the use of a rotating grinding disc supported by a holder movable in a direction parallel to a cutting direction.
  • the grinding disc is acted on by an adjustable guide tool with an automatic setting drive for the latter, which is coupled to a control device receiving the output of a sensor monitoring the cutting diameter of the rotating blades.
  • EP 2,759,375 discloses a grinding roller that performs sliding engagement with a cutting knife transversely to the grinding axis.
  • an adjustment apparatus for adjusting the position of a diamond in a cutting machine, the diamond comprising a cutting face and the apparatus comprising:
  • the position sensor is arranged to determine and communicate the position of the diamond cutting face when in a sensing configuration.
  • the tobacco cutting machine comprises a rotatable drum comprising a plurality of knives each comprising a knife edge and a grinding wheel.
  • the grinding wheel is arranged to abrade the one or more knife edges by making one or more traverses in a direction parallel to an axis of rotation of the rotatable drum.
  • the diamond is arranged to dress the grinding wheel.
  • the grinding wheel is preferably passed over the diamond periodically so it can be dressed.
  • the grindstone will first be inhibited from passing over the diamond and the position sensor will be arranged in the sensing configuration.
  • the position sensor will then determine the position of the diamond cutting face and communicate said position to the device arranged to adjust the position of the diamond.
  • the device will then adjust the position of the diamond by a predetermined amount in response to the communication from the position sensor such that the diamond cutting face is adjusted to an optimum position for contacting the grindstone. Operation of the grinding wheel will then be resumed, and it will be traversed to sharpen the knives and allowed to pass over the diamond for dressing at the end of one or more traverses.
  • the position sensor determines that the diamond is already in the optimum position, it will communicate this to the device which will respond by taking no action to move the diamond i.e. the device will adjust the position of the diamond by a predetermined amount substantially equal to 0.
  • Correct positioning of the diamond is crucial for maintaining the correct radial position of the grinding wheel relative to the axis of rotation of the rotatable drum, which ensures that there is optimum clearance between the one or more knife edges and the static mouth part in the cutting machine. Maintaining an optimum clearance provides a tobacco product with an optimum cut quality for use in smoking articles and also reduces the risk of damage to the cutting machine.
  • the position sensor comprises an air gauge.
  • the air gauge will typically comprise a regulated air supply that is arranged to flow from a first orifice to a second orifice.
  • the second orifice will be located proximal the diamond cutting face when the position sensor is in the sensing configuration.
  • a pressure difference across the second orifice will thus be proportional to the distance between the second orifice and the diamond cutting face. This pressure difference is preferably sensed by a transducer.
  • the position sensor may comprise a laser or an LED to determine positional information.
  • Other alternative optical sensing apparatuses and proximity sensors for determining positional information are also envisaged and will be known to those skilled in the art. Air gauging is preferable as it is an accurate non-contact method which is robust and unaffected by the presence of dust and grinding grit on the diamond cutting face which is typically present in the area around the diamond pillar.
  • the position sensor and the diamond cutting face are proximal but do not touch i.e. the sensing operation is contactless.
  • the sensing operation is contactless.
  • Using a position sensor that does not require physical contact with the diamond cutting face greatly reduces the possibility of measurement errors, for example, due to dirt contamination between the position sensor and cutting face. There is also no risk of deformation of the position sensor caused by contact forces as found in the prior art.
  • the position sensor determines the position of the diamond cutting face with an accuracy between 0.005 mm and 0.001 mm.
  • the quality of the cut material produced by the cutting machine is directly linked to the accuracy of the diamond position.
  • the ability to determine the position of the diamond to a high degree of accuracy is important to maintain the diamond in the optimum position.
  • the diamond is housed within a cutting machine and is fixed to a static part of the cutting machine.
  • the device arranged to adjust the position of the diamond comprises a stepper motor.
  • the device is arranged to adjust the position of the diamond with an accuracy between 0.005 mm and 0.001 mm. Since the quality of the cut material produced by the cutting machine is directly linked to the accuracy of the diamond position, the ability to adjust the position of the diamond to a high degree of accuracy is important to maintain the diamond in the optimum position.
  • the combined accuracy of the position sensor and device arranged to adjust the position of the diamond together determine the quality of the material cut by the machine.
  • the communication between the position sensor and the device may be direct or indirect.
  • the apparatus may further comprise a processor arranged to receive and transmit communications between the position sensor and the device. The processor may also be arranged to interpret positional information received by the position sensor, to perform calculations on the positional information and/or transmit communications in a format that can be received and actuated by the device.
  • the position of the diamond is adjusted substantially along an adjustment axis that extends from the diamond cutting face to the position sensor.
  • the position sensor in the sensing position will be directly above the cutting face of the diamond.
  • the device responds to the communication from the position sensor to move the diamond along the adjustment axis to position the diamond closer to or further from the position sensor.
  • the position sensor may be fixed at an optimum position such that the air flow, laser, LED or similar sensor is aligned at an optimum position relative to the grinding wheel, perpendicular to the adjustment axis
  • the position sensor will then communicate with the device if the cutting face of the diamond is at said optimum position by determining an interference, presence or obstruction in the air flow, laser or LED etc.
  • the position sensor may be fixed in the sensing configuration or may be moveable between the sensing configuration and an idle configuration remote from the vicinity of the diamond cutting face when not required for sensing.
  • the adjustment apparatus further comprises an arm arranged to move the position sensor between the sensing configuration and the idle configuration.
  • the arm is arranged on a rotating wheel, wherein the rotating wheel rotates about an axis substantially perpendicular to the diamond adjustment axis.
  • the rotatable wheel allows the position sensor to be safely stored in the idle configuration remote from the diamond, grinding wheel and other parts of the cutting drum when it is not required for use.
  • the rotatable wheel may be actuated by a control device.
  • the position of the diamond may be checked at periodically programmed intervals determined by the control device or as determined by an operator.
  • the control device or operator will activate the adjustment apparatus to begin the process of adjusting the diamond and the position sensor will be moved from the idle configuration to the sensing configuration.
  • the diamond will then be raised or lowered with respect to the grinding wheel.
  • the position sensor in the sensing position determines that the diamond cutting face is at an optimal position, the position sensor is moved from the sensing position to the idle configuration by the arm.
  • the method comprises:
  • the position of the diamond is adjusted by a predetermined amount in response to the position of the diamond cutting face communicated to the device by the position sensor. Communication between the position sensor and the device can occur continuously or at periodic interval as determined by the operator. This ensures that the optimum position of the diamond is maintained at all times to provide a high quality cut product.
  • the method of adjusting the position of the diamond may be performed while the cutting machine is in operation.
  • the optimum position of the diamond cutting face can be checked and maintained without the need to stop the machine. This prevents loss in productivity resulting from machine down-time, significantly increases outputs and reduces the cost of running the machine.
  • the present invention negates the need for manual adjustment of the diamond in a tobacco cutting machine by an operator and therefore reduces the cost of carrying out the adjustment.
  • the apparatus is safe and does not require a user to come into close proximity with various sharp edges and moving parts present in the cutting machine.
  • the diamond position can be adjusted as frequently as required and clearance between the knife edges and the machine mouth can be controlled to a high level of accuracy, thus increasing the quality of the cut and reducing the risk of damage to the cutting machine.
  • the cutting machine 100 has a rotatable drum 101 comprising a plurality of knives 102 that protrude from the circumference of the drum 101 and a mouth 103 adjacent the rotatable drum 101.
  • a conveyor belt 104 is arranged to carry material to be cut (not shown) towards the mouth 103 where it is delivered to the rotatable drum 101 and is cut by the knives 102.
  • the rotatable drum 101 typically rotates at a speed between 200 and 600 rpm.
  • the arrow on Figure 1 shows the direction of rotation of the rotatable drum 101. As the knives 102 cut the material that is delivered by the mouth, they are rapidly blunted.
  • the cutting machine 100 has a grinding wheel (or grindstone) 105 arranged to sharpen and maintain the profile of the knives 102.
  • the grinding wheel 105 is typically composed of abrasive grit and a bonding material. In use, the grinding wheel 105 is traversed parallel to the axis of rotation of the rotatable drum 101. It is necessary to feed the knives 102 outwardly from the rotatable drum 101 either continuously or at frequent intervals to compensate for this abrasion of the grinding wheel 105 and maintain the correct geometrical relationship between the edges of the knives 102 and the material being cut.
  • the cutting machine 100 further comprises a diamond 106 located near the edge of the rotating drum 101 (as seen in Figure 2a and 2b ).
  • the grinding wheel 105 is periodically dressed when it passes over the diamond 106 at the end of a traverse.
  • the diamond 106 removes a thin layer of the bonding material and abrasive grit from the grinding wheel 105.
  • the grinding wheel 105 To compensate for the material lost from the grinding wheel 105 by the dressing action of the diamond 106, the grinding wheel 105 must be gradually advanced in a radial direction towards the knives 102 on the rotating drum 101.
  • the advancement may be either continuous or periodic.
  • the diamond 106 has a cutting face 107 comprised of several diamond threads mounted on a static aluminium support.
  • the cutting face 107 of the diamond 106 is orientated such that it will contact the outer circumference of the grinding wheel 105 to perform the dressing action when it passes over the diamond 106.
  • the adjustment apparatus 200 is arranged to help an operator raise the diamond 106 when it is determined that the diamond 106 has worn down.
  • the adjustment apparatus 200 has a stopper 208 and a housing 210 for the diamond 106 with a clamp 211 that holds the mounted diamond 106 in position.
  • Figure 2a illustrates the arrangement of the adjustment apparatus 200 while the cutting machine 100 is in operation.
  • the stopper 208 is in a retracted position and the cutting face of the cutting face 107 of the diamond 106 is free from obstruction.
  • the grinding wheel 105 carries out traverses parallel to the axis of rotation of the rotatable drum 101, it is periodically dressed when it passes over the diamond 106 at the end of each traverse.
  • Figure 2b illustrates the arrangement of the adjustment apparatus such that the operator (not shown) can perform the adjustment operation to raise the diamond 106.
  • the stopper 208 is in an extended position such that it is positioned directly above the cutting face of the diamond 106.
  • the cutting machine 100 In use, to perform the adjustment operation, the cutting machine 100 must be first be turned off for safety to reduce the risk of harm to the operator by the sharp edges of the knives 102 and moving parts in the cutting machine 100 (e.g. the movement of the rotatable drum 101 and grinding wheel 105).
  • the stopper 208 will then be moved from the retracted position ( Figure 2a ) to the extended position ( Figure 2b ) and the operator will insert a feeler gauge (not shown) between the stopper 208 and the diamond cutting face 107.
  • the operator will then release the clamp 211 on the diamond housing 210 and will raise the diamond 106 until the cutting face 107 contacts the feeler gauge.
  • the diamond 106 will then be reclamped in this adjusted position, the feeler gauge removed and the stopper 208 retracted so that the cutting face of the diamond 106 is not obstructed.
  • the cutting machine 100 may then be restarted.
  • the stopper 208 and feeler gauge (not shown) provide the datum or reference point for the optimum position of the diamond hence the accuracy of the diamond adjustment is related to the accuracy of the position of the stopper 208 and the skill of the operator.
  • an adjustment apparatus 300 for adjusting the position of a diamond 106 on a cutting machine 100 according to an embodiment of the present invention.
  • the adjustment apparatus comprises a position sensor 320 and a device 322 arranged to adjust the position of the diamond 106 (i.e. move the diamond 106).
  • the position sensor 320 is arranged on an arm 324 which is attached to a wheel 325 that can be rotated through 90° such that it can be moved from an idle configuration ( Figure 3 ) where the position sensor 320 is remote from the diamond 106, to a sensing configuration ( Figure 4 ) where the position sensor 320 is directly above, but not in contact with the diamond 106.
  • the position sensor 320 comprises an air gauge 326.
  • the air gauge 326 comprises a first orifice and a second orifice and a regulated air supply that is arranged to flow from the first to the second orifice. In the sensing configuration, the second orifice will be located proximal the diamond cutting face 107.
  • the position sensor 320 will determine the position of the diamond cutting face 107 by determining the pressure difference across the second orifice on the air gauge 326 which is proportional to the distance between the second orifice and the diamond cutting face 107.
  • the position sensor 320 may further comprise a transducer to sense this pressure difference.
  • the air gauge 326 can sense the position of the diamond 106 to a high accuracy between 0.005 mm and 0.001 mm and allows the position of the diamond 106 to be sensed without making physical contact. This eliminates possible errors due to dirt contamination or due to deformation of the measuring system caused by contact forces (as would be the case with the adjustment apparatus 200).
  • the position sensor 320 will then communicate the determined position of the diamond 106 to the device 322 which will respond by raising the diamond 106 such that the cutting face 107 is in the optimum position to dress the grinding wheel 105.
  • the method of sensing and re-positioning of the diamond 106 is fully automated and can be programmed to work continuously or periodically as desired by the operator.
  • the adjustment apparatus 300 further comprises a diamond housing 310 and two spring clamps 328.
  • the spring clamps 328 are orientated substantially perpendicular to the direction of adjustment of the diamond 106.
  • the spring clamps 328 hold the diamond 106 securely in the housing 310 whilst still allowing the diamond to be moved in the desired direction i.e. to be raised or lowered relative to the housing 310.
  • the device 322 arranged to position the diamond 106 is comprised of a stepper motor 330 and a worm and wheel mechanism 332 (see Figure 5 ).
  • the worm and wheel mechanism 330 is housed in an outer casing 334 to prevent damage to the mechanism.
  • FIG. 5 there is shown part of the adjustment apparatus 300 comprising the device 322 arranged to position the diamond 106.
  • the outer casing 334 of the device 322 has been removed and the worm and wheel mechanism 332 is shown.
  • the rotational movement of the stepper motor 330 is translated to horizontal movement of the diamond 106.
  • the stepper motor 330 turns a worm 336 which meshes with a worm-wheel 338 which is internally machined with a helical spiral. This spiral engages with an equivalent spiral machined on the exterior of a rod (not shown) which pushes against the underside of the diamond 106.
  • the worm-wheel 338 and rod therefore act as a screw-jacking mechanism which locates the position of the diamond 106.
  • the diamond 106 is raised in a direction away from the adjustment apparatus 300.
  • Use of a stepper motor 330 allows the device 322 to adjust the position of the diamond 106 with great sensitivity and a high degree of accuracy typically between 0.005 mm and 0.001 mm.
  • the combined sensitivity and accuracy of the position sensor 320 and the device 322 used to position the diamond 106 is directly linked to the quality of the cut material produced by the cutting machine 100.
  • the described embodiment of the adjustment apparatus 300 allows the diamond 106 to be maintained in the optimum position on the cutting machine and results in material cut to a very high accuracy and quality.
  • the adjustment apparatus 300 may further comprise a proximity switch which confirms movement of the diamond 106 during the adjustment process and provides signals to enable diamond life monitoring via human-machine interface (HMI).
  • HMI human-machine interface
  • the adjustment apparatus 300 may further comprise a winding mechanism arranged to move the diamond 106 in and out of the diamond housing 310 such that the diamond 106 can be replaced when it has become too worn.
  • the winding mechanism may be operated manually or may be automated.
  • the adjustment apparatus 300 may further comprise an accelerometer arranged to confirm contact between the grinding wheel 105 and the diamond 106.
  • the accelerometer is mounted on the diamond housing 310, and detects vibration caused by the contact between the grinding wheel 105 and the diamond 106.
  • position sensor any type of position sensor may be used.
  • a position sensor that does not come into contact with the cutting face of the diamond when in the sensing position will provide the same advantages as an air gauge, laser or optical sensing apparatus as herein described.
  • the position sensor may communicate directly with the device arranged to adjust the position of the diamond or there may be an intermediate communication step, for example, via a processor.
  • the amount that the diamond is to be adjusted may be determined by the position sensor which communicates to the device or may be determined by the processor or by the device itself in response to the position communication received from the position sensor or processor.
  • the overall operation of the adjustment apparatus may be controlled by the control device which may have a human machine interface (HMI). There may be functions on the control device for the operator to override and alter one or all of the adjustment steps performed by the adjustment apparatus.
  • HMI human machine interface

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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)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)

Claims (13)

  1. Machine de coupe de tabac comprenant un tambour rotatif, ledit tambour comprenant en outre une pluralité de couteaux qui font saillie à partir de la circonférence du tambour,
    la machine de coupe de tabac comprenant en outre une roue de meulage agencée de façon à affûter et à maintenir le profil des couteaux, et comprenant encore en outre an appareil de réglage pour régler la position d'un diamant dans la machine de coupe de tabac, le diamant (106) comprenant une face de coupe (107) et l'appareil comprenant :
    un capteur de position (320) pour déterminer la position de la face de coupe du diamant (107) et un dispositif (322) agencé de façon à régler la position du diamant, cas dans lequel
    le capteur de position (320) est agencé de façon à communiquer la position de la face de coupe du diamant (107) au dispositif (322) et le dispositif est agencé de façon à régler la position du diamant (106) suivant une ampleur prédéterminée en réaction à la communication en provenance du capteur de position (320),
    en outre cas dans lequel
    le capteur de position (320) est agencé de façon à déterminer et à communiquer la position de la face de coupe du diamant (107) lorsqu'il se trouve dans une configuration de détection,
    caractérisée en ce que
    l'appareil comprend en outre un bras (324) agencé de façon à déplacer le capteur de position (320) à partir de la configuration de détection jusqu'à une configuration de repos dans laquelle il est distant du voisinage de la face de coupe du diamant (107), et
    le bras (324) est agencé sur une roue en rotation (325), cas dans lequel la roue en rotation tourne autour d'un axe qui est sensiblement perpendiculaire à l'axe de réglage du diamant.
  2. Machine de coupe de tabac selon la revendication 1, le capteur de position comprenant un indicateur de pression d'air (326).
  3. Machine de coupe de tabac selon la revendication 2, l'indicateur de pression d'air (326) comprenant une alimentation d'air régulée agencée de façon à s'écouler à partir d'un premier orifice jusqu'à un deuxième orifice, le deuxième orifice étant localisé à proximité de la face de coupe du diamant (107) pendant la configuration de détection et cas dans lequel une différence de pression en travers du deuxième orifice est détectée par un transducteur et est proportionnelle à la distance entre le deuxième orifice et la face de coupe du diamant (107).
  4. Machine de coupe de tabac selon la revendication 1, le capteur de position comprenant un laser.
  5. Machine de coupe de tabac selon la revendication 1, le capteur de position comprenant un appareil de détection optique.
  6. Machine de coupe de tabac selon n'importe quelle revendication précédente, la configuration de détection du capteur de position (320), au moment de détecter la position de la face de coupe du diamant (107), étant sans contact.
  7. Machine de coupe de tabac selon n'importe quelle revendication précédente, le diamant (106) étant logé à l'intérieur d'une machine de coupe et étant fixé à une partie statique de la machine de coupe.
  8. Machine de coupe de tabac selon n'importe quelle revendication précédente, le dispositif (322) agencé pour régler la position du diamant (106) comprenant un moteur pas-à-pas (330).
  9. Machine de coupe de tabac selon n'importe quelle revendication précédente, la position du diamant étant réglée sensiblement le long d'un axe de réglage qui s'étend dans un sens allant de la face de coupe du diamant (107) jusqu'au capteur de position (320).
  10. Machine de coupe de tabac selon la revendication 1, lorsque le capteur de position (320) dans la position de détection détermine que la face de coupe du diamant (107) se trouve à une position optimale, le capteur de position étant déplacé à partir de la position de détection jusqu'à la position de repos par le bras (324).
  11. Procédé de réglage de la position d'un diamant (106) dans une machine de coupe de tabac selon les revendications 1 à 10, le diamant (106) comprenant une face de coupe (107), le procédé comprenant les opérations consistant à :
    mettre à disposition un capteur de position (320) pour déterminer la position de la face de coupe du diamant (107) ;
    agencer le capteur de position (320) à proximité dudit diamant (106) ;
    mettre à disposition un dispositif (322) pour régler la position du diamant (106) ;
    déterminer la position de ladite face de coupe du diamant (107) à l'aide du capteur de position (320) ;
    communiquer la position de ladite face de coupe du diamant (107) au dispositif (322) ;
    régler la position du diamant (106) suivant une ampleur prédéterminée à l'aide du dispositif (322).
  12. Procédé selon la revendication 11, la position du diamant (106) étant réglée suivant une ampleur prédéterminée en réaction à la position de la face de coupe du diamant (107) ayant été communiquée par le capteur de position (320).
  13. Procédé selon la revendication 11 ou 12, le procédé étant réalisé pendant que la machine de coupe est en fonctionnement.
EP15165015.7A 2014-06-17 2015-04-24 Appareil de réglage Active EP2957184B1 (fr)

Priority Applications (1)

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PL15165015T PL2957184T3 (pl) 2014-06-17 2015-04-24 Urządzenie regulacyjne

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1410733.8A GB2527307B (en) 2014-06-17 2014-06-17 Adjusting the position of a diamond dresser in a cutting machine

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EP2957184B1 true EP2957184B1 (fr) 2017-02-01

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HK (1) HK1219076A1 (fr)
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PL234277B1 (pl) * 2017-01-27 2020-01-31 Int Tobacco Machinery Poland Spolka Z Ograniczona Odpowiedzialnoscia Urządzenie tnące przemysłu tytoniowego, oraz sposób wykrywania uszkodzeń noża tnącego w przemyśle tytoniowym
CN110434754B (zh) * 2019-08-10 2021-03-02 哈尔滨工业大学 一种高精度单晶金刚石圆锥压头的机械研磨工艺
CN114343225B (zh) * 2021-12-22 2022-10-25 云南昆船烟草设备有限公司 一种烟草制丝线上切丝机自动调整刀门间隙的方法

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DE2932629A1 (de) * 1979-08-11 1981-02-26 Hauni Werke Koerber & Co Kg Vorrichtung zum schleifen der messer eines tabakschneiders
JPH0763935B2 (ja) * 1988-11-30 1995-07-12 ジューキ株式会社 ドレッサーと砥石のドレッシング装置
PL205471B1 (pl) * 2003-12-05 2010-04-30 Int Tobacco Machinery Poland Sposób kontroli szczeliny między nożami krajarki do cięcia materiałów pochodzenia roślinnego, zwłaszcza do tytoniu
JP5586409B2 (ja) * 2010-10-08 2014-09-10 Ntn株式会社 ドレッシング装置
JP5857660B2 (ja) * 2011-06-27 2016-02-10 株式会社ジェイテクト 研削盤のツルーイング装置
DE102013100751A1 (de) * 2013-01-25 2014-07-31 Hauni Maschinenbau Ag Vorrichtung und Verfahren zum Schleifen mindestens eines an einer Messertrommel angeordneten und umlaufend angetriebenen Trennmessers

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GB2527307B (en) 2018-12-19
GB201410733D0 (en) 2014-07-30
EP2957184A1 (fr) 2015-12-23
HK1219076A1 (zh) 2017-03-24
GB2527307A (en) 2015-12-23
PL2957184T3 (pl) 2017-08-31

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