EP4140645A1 - Procédé de contrôle de l'usinage de panneaux ayant une forme essentiellement parallélépipédique et machine pour l'usinage de panneaux ayant une forme essentiellement parallélépipédique, notamment ponceuse pour le ponçage/la finition de panneaux en bois, en métal ou similaires - Google Patents

Procédé de contrôle de l'usinage de panneaux ayant une forme essentiellement parallélépipédique et machine pour l'usinage de panneaux ayant une forme essentiellement parallélépipédique, notamment ponceuse pour le ponçage/la finition de panneaux en bois, en métal ou similaires Download PDF

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Publication number
EP4140645A1
EP4140645A1 EP22192111.7A EP22192111A EP4140645A1 EP 4140645 A1 EP4140645 A1 EP 4140645A1 EP 22192111 A EP22192111 A EP 22192111A EP 4140645 A1 EP4140645 A1 EP 4140645A1
Authority
EP
European Patent Office
Prior art keywords
detection device
control unit
panels
machining
machine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP22192111.7A
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German (de)
English (en)
Other versions
EP4140645B1 (fr
Inventor
Fabio Balducci
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.)
Biesse SpA
Original Assignee
Biesse SpA
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Publication date
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Publication of EP4140645A1 publication Critical patent/EP4140645A1/fr
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Publication of EP4140645B1 publication Critical patent/EP4140645B1/fr
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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
    • B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
    • B24B21/04—Machines or devices using grinding or polishing belts; Accessories therefor for grinding plane surfaces
    • B24B21/06—Machines or devices using grinding or polishing belts; Accessories therefor for grinding plane surfaces involving members with limited contact area pressing the belt against the work, e.g. shoes sweeping across the whole area to be ground
    • 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
    • B24B49/00—Measuring 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
    • B24B49/02—Measuring 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 according to the instantaneous size and required size of the workpiece acted upon, the measuring or gauging being continuous or intermittent
    • B24B49/04—Measuring 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 according to the instantaneous size and required size of the workpiece acted upon, the measuring or gauging being continuous or intermittent involving measurement of the workpiece at the place of grinding during grinding operation
    • B24B49/045—Specially adapted gauging instruments
    • 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
    • B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
    • B24B7/20—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground
    • B24B7/28—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground for grinding wood

Definitions

  • This invention relates to a method for controlling the machining of panels with a substantially parallelepiped-like shape and to a machine for machining panels with a substantially parallelepiped-like shape.
  • this invention finds advantageous application in a machine for sanding/finishing panels made of wood, metal, or the like, to which this discussion will make explicit reference without any loss of generality thereby.
  • a sanding machine of the type comprising a feeding device, which defines a support surface that is basically horizontal for at least one panel, and is designed to feed the panel in a first, basically horizontal direction from one input station to one output station of the sanding machine; a sanding device mounted above the support surface for sanding an upper face of the panel; and a detection device for detecting a width of the panel in a second direction parallel to the support surface and transverse to the first direction.
  • the feeding device comprises, normally, a lower belt conveyor and multiple upper pressure rollers held in contact with the upper face of the panel to keep the panel on the above-mentioned support surface.
  • the sanding device comprises a sanding belt wound in a ring around multiple idler rollers, and multiple thrust elements, which are distributed within the sanding belt in the second direction, and are independently movable in a third direction that is orthogonal to the support surface between respective lowered operating positions, wherein the corresponding sanding belt portions are moved in contact with the upper face of the panel, and respective raised rest positions, wherein the corresponding sanding belt portions disengage the upper face of the panel itself.
  • the sanding machines are also provided with a thickness detection device for detecting the thickness of the panel undergoing the machining produced using a digital caliper with a slider connected to a control unit of the sanding machine.
  • the digital caliper with a slider and the control unit are configured so as to communicate between them through a wireless data communication system.
  • the wireless data communication system comprises a transmitting element housed on the digital caliper with a slider and a receiving element housed on the control unit.
  • DE-A1-102019207746 describes a known method for controlling the machining of panels with a substantially parallelepiped-like shape
  • US-B1-6769958 and CN-A-107297678 describe known thickness detection devices.
  • the wireless data communication systems of a known type have, however, some drawbacks mainly deriving from the fact that they are particularly sensitive to interferences and disturbances generated by other, particularly powerful wireless data communication systems (for example, the radio-frequency communication system of overhead cranes) and normally present in industrial work environments. Additional problems derive from the fact that the unit of measurement used by the digital caliper with a slider (for example, millimetres) often does not correspond to the unit of measurement set in the control unit (for example, inches).
  • the measurement of the thickness of the panel must always be preceded by a procedure for enabling the measurement that interferes with the operation of the sanding machine and that the operator must implement by pressing a dedicated start button that is normally housed on an operator interface - for example a control panel and/or a display.
  • the purpose of this invention is to provide a method for controlling the machining of panels with a substantially parallelepiped-like shape, which is free of the drawbacks of the state of the art and, in particular, is easy and economical to implement.
  • An additional purpose of this invention is to provide a machine for machining panels with a substantially parallelepiped-like shape, which is free of the drawbacks of the state of the art and, in particular, is easy and economical to implement.
  • reference number 1 indicates, as a whole, a machine for machining panels with a substantially parallelepiped-like shape, in particular a sanding machine for sanding/finishing panels 2 made of wood, metal, or the like.
  • the machine 1 comprises a frame 3 that encloses a feeding device 4 inside supported by the frame 3 for feeding, in succession, the panels 2 in a horizontal direction X.
  • the device 4 comprises a lower conveyor belt 5 which has an upper transport branch defining a horizontal support surface P for the panels 2, and is wound in a ring around a pair of motorised pulleys 6 mounted to rotate, in relation to the frame 3, around respective longitudinal axes A that are parallel to each other and in a horizontal direction R that is transverse to the direction X.
  • the device 4 comprises, in addition, multiple upper pressure rollers held in contact with the panels 2 for keeping the panels 2 on the surface P.
  • the machine 1 comprises, in addition, a sanding unit 8 comprising, in turn, a sanding belt 9, which is wound in a ring around multiple idler rollers 10 (in this case, three rollers 10), and is fed around the idler rollers 10 in a rotation direction opposite to a rotation direction of the conveyor 5 so as to cooperate with the feeding device 4 to feed the panels 2 in the direction X.
  • a sanding unit 8 comprising, in turn, a sanding belt 9, which is wound in a ring around multiple idler rollers 10 (in this case, three rollers 10), and is fed around the idler rollers 10 in a rotation direction opposite to a rotation direction of the conveyor 5 so as to cooperate with the feeding device 4 to feed the panels 2 in the direction X.
  • the idler rollers 10 are mounted to rotate around respective longitudinal axes B parallel to the direction R, and are arranged so as to confer a basically triangular configuration to the belt 9.
  • the arrangement of the idler rollers 10 is such that the belt 9 has a lower branch 11 that is basically flat and parallel to the surface P.
  • the lower branch 11 is selectively brought into contact with an upper face 12 of the panels 2 by a thrust device 13 mounted inside the belt 9.
  • the thrust device 13 comprises, in this case, multiple thrust elements 14, which are distributed inside the belt 9 in the direction R, are mounted above the branch 11, and are independently movable in a vertical direction S that is orthogonal to the directions X and R perpendicular to the surface P.
  • Each thrust element 14 is movable in the direction S between a lowered operating position, wherein the corresponding portion of the belt 9 is moved in contact with the face 12, and a raised rest position, wherein the corresponding belt 9 portion is disengaged from the face 12 itself.
  • Each panel 2 is fed by the feeding device 4 in the direction X by an input station 15 to an output station 16 of the machine 1.
  • the output station 16 is provided with a braking assembly that is assembled above the surface P and designed to slow down the panels 2 that are leaving so that the feeding speed of the panel 2 through the output station 16 is below a safety value.
  • the machine 1 finally comprises a processing system 17, which is designed to monitor the operation of the machine 1 itself.
  • the processing system 17 comprises at least one control unit 18, which is suited to control the sanding/finishing process of the panels 2 and the operation of the different components of the machine 1.
  • the processing system 17 comprises an operator interface 19, for example a control panel and/or display or the like, via which an operator can control the panel 2 scanning process and the subsequent panel 2 sanding/finishing process.
  • the operator interface 19 is connected to an external lateral surface of the frame 3.
  • the processing system 17 is provided with a detection device 20 mounted above and at the entrance of the surface P for detecting a transverse width of the panel 2 in the direction X.
  • the detection device 20 is mechanical and comprises multiple contact rollers 21, which are distributed above the surface P in the direction X, and are mounted to rotate around respective rotation axes C parallel to each other and parallel to the direction X itself.
  • the contact rollers 21 arranged within the feeding path of the panel 2 are raised by the panel 2 so as to enable the detection device 20 to acquire the width of the panel 2 itself in the direction X.
  • the contact rollers 21 are eliminated and replaced with a detection device 20 not in contact with the panels 2, for example, an optical, inductive, or capacitive one.
  • the processing system 17 is provided with a thickness detection device 22 for detecting the thickness of the panel 2 (along a direction orthogonal to the direction X).
  • the detection device 22 is housed on a support 23 connected to an external lateral surface of the frame 3; according to a preferred variant, the support is arranged below and near the operator interface 19.
  • the thickness detection device 22 comprises a digital caliper 24 with a slider produced using two portions, indicated with 25* and 25**, which slide axially between them, and are equipped with respective appendages (or jaws) 26 that project from the portions 25*, 25** in the same direction and are designed to act as a stop for the panels 2 to be measured.
  • the digital caliper 24 comprises a fixed portion 25* having a graduated rule and a movable portion 25**.
  • the movable portion 25** is connected to a display 27 via which an operator can control the process for measuring the thickness of the panel 2 and display the measurement obtained.
  • the thickness detection device 22 is connected to a data receiving module 28 with which it communicates through a wireless communication module 29.
  • the wireless communication module 29 is a Bluetooth module 29 for transmitting, digitally, the measurements obtained from the digital caliper 24.
  • the thickness detection device 22 and the data receiving module 28 are configured so as to communicate between them through a wireless data communication system provided with two Bluetooth communication modules 29, 30 housed, respectively, in the thickness detection device 22 and in the data receiving module 28.
  • the thickness detection device 22 also comprises a battery-powered module 31.
  • the Bluetooth communication module 30 is preferably produced using a microcontroller board 32 that is programmed, in a preliminary set-up step, to acquire the signal sent by the Bluetooth communication module 29.
  • the microcontroller board 32 is programmed to convert, when it is necessary, the measurement made by the thickness detection device 22 (available, for example, in millimetres) in the measuring unit set in the control unit 18 (for example, inches).
  • the microcontroller board 32 is programmed to transmit the information to the control unit 18.
  • the digital caliper 24 comprises, finally, a transmitting button designed to enable the operator to transfer the measurement obtained by the digital caliper 24 itself by sending the signal from the first Bluetooth communication module 29 to the second Bluetooth communication module 30.
  • the processing system 17 is provided with a presence sensor 33, preferably an inductive one, housed in the support 23 and designed to detect the presence of the thickness detection device 22 on the support 23; the sensor 33 is connected to the control unit 18 with which it communicates to provide information regarding the presence, or lack thereof, of the thickness detection device 22 on the support 23.
  • a presence sensor 33 preferably an inductive one
  • the operator removes the digital caliper 24 from the support 23; the presence sensor 33 communicates, thus, to the control unit 18 that the digital caliper 24 is no longer housed in the support 23.
  • the control unit 18 is configured to receive a measurement of the thickness of the panel 2 undergoing the machining within a time interval of a predetermined length (for example, five minutes).
  • the operator takes the measurement of the thickness of the panel 2 using the digital caliper 24 and the measurement taken is displayed on the display 27. Having taken the measurement of the thickness of the panel 2, the operator presses the transmitting button so as to transfer the measurement taken by the digital caliper 24.
  • the Bluetooth communication module 29 thus transmits the measurement just obtained to the data receiving module 28 and, in particular, to the Bluetooth communication module 30.
  • the microcontroller board 32 proceeds to convert the measurement of the thickness obtained by the digital caliper 24 into the unit of measurement set in the control unit 18. Finally, the microcontroller board 32 transmits the measurement of the thickness to the control unit 18.
  • the measurement of the thickness of the panel 2 obtained via the digital caliper 24 is displayed on the operator interface 19 and is used by the control unit 18 to control the sanding/finishing process of the panel 2.
  • the control unit 18 does not receive a measurement of the thickness of the panel 2 undergoing machining within the predetermined time interval from the removal of the digital caliper 24 from the support 23 (this eventuality may easily occur, for example, if the operator, having removed the digital caliper 24 from the support 23 is involved in other operations and forgets the digital caliper 24 in their pocket), the subsequent measurement of the thickness of the panel 2 must be preceded by a procedure for enabling the measurement itself that the operator must implement by pressing the transmitting function n times (with n, for example, equal to 3). In this way, the control unit 18 is again configured to receive a measurement of the thickness of the panel 2 undergoing machining within the predetermined time interval.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Golf Clubs (AREA)
EP22192111.7A 2021-08-27 2022-08-25 Procede de controle de l'usinage de panneaux ayant une forme essentiellement parallelepipedique et machine pour l'usinage de panneaux ayant une forme essentiellement parallelepipedique, notamment ponceuse pour le ponçage/la finition de panneaux en bois, en metal ou similaires Active EP4140645B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102021000022463A IT202100022463A1 (it) 2021-08-27 2021-08-27 Metodo per controllare la lavorazione di pannelli di forma sostanzialmente parallelepipeda e macchina per la lavorazione di pannelli di forma sostanzialmente parallelepipeda, in particolare macchina levigatrice per la levigatura/satinatura di pannelli di legno, metallo, o simili

Publications (2)

Publication Number Publication Date
EP4140645A1 true EP4140645A1 (fr) 2023-03-01
EP4140645B1 EP4140645B1 (fr) 2024-07-10

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP22192111.7A Active EP4140645B1 (fr) 2021-08-27 2022-08-25 Procede de controle de l'usinage de panneaux ayant une forme essentiellement parallelepipedique et machine pour l'usinage de panneaux ayant une forme essentiellement parallelepipedique, notamment ponceuse pour le ponçage/la finition de panneaux en bois, en metal ou similaires

Country Status (2)

Country Link
EP (1) EP4140645B1 (fr)
IT (1) IT202100022463A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6769958B1 (en) 2002-08-21 2004-08-03 Howard W. Grivna Material removal monitor
CN107297678A (zh) 2016-04-14 2017-10-27 快递股份有限公司 平面研磨装置
US20200047305A1 (en) * 2018-08-09 2020-02-13 Viet Italia S.R.L. Sanding machine for the sanding/finishing panels made of wood, metal, or the like
DE102019207746A1 (de) * 2019-05-27 2020-12-03 Robert Bosch Gmbh Verfahren zum Ermitteln einer Zustandsinformation betreffend eine Bandschleifmaschine mittels eines maschinellen Lernsystems

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6769958B1 (en) 2002-08-21 2004-08-03 Howard W. Grivna Material removal monitor
CN107297678A (zh) 2016-04-14 2017-10-27 快递股份有限公司 平面研磨装置
US20200047305A1 (en) * 2018-08-09 2020-02-13 Viet Italia S.R.L. Sanding machine for the sanding/finishing panels made of wood, metal, or the like
DE102019207746A1 (de) * 2019-05-27 2020-12-03 Robert Bosch Gmbh Verfahren zum Ermitteln einer Zustandsinformation betreffend eine Bandschleifmaschine mittels eines maschinellen Lernsystems

Also Published As

Publication number Publication date
EP4140645B1 (fr) 2024-07-10
IT202100022463A1 (it) 2023-02-27

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