EP3536452A1 - Procédé de fonctionnement d'un dispositif de meulage - Google Patents

Procédé de fonctionnement d'un dispositif de meulage Download PDF

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Publication number
EP3536452A1
EP3536452A1 EP19158153.7A EP19158153A EP3536452A1 EP 3536452 A1 EP3536452 A1 EP 3536452A1 EP 19158153 A EP19158153 A EP 19158153A EP 3536452 A1 EP3536452 A1 EP 3536452A1
Authority
EP
European Patent Office
Prior art keywords
grinding
abrasive
data
workpiece
actual
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.)
Withdrawn
Application number
EP19158153.7A
Other languages
German (de)
English (en)
Inventor
Christoph Giese
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.)
Karl Heesemann Maschinenfabrik GmbH and Co KG
Original Assignee
Karl Heesemann Maschinenfabrik GmbH and Co KG
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 Karl Heesemann Maschinenfabrik GmbH and Co KG filed Critical Karl Heesemann Maschinenfabrik GmbH and Co KG
Publication of EP3536452A1 publication Critical patent/EP3536452A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
    • 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
    • B24B49/18—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 taking regard of the presence of dressing tools
    • B24B49/183—Wear compensation without the presence of dressing tools
    • 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
    • B24B49/03—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 according to the final size of the previously ground workpiece
    • 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
    • B24B21/008—Machines comprising two or more tools or having several working posts
    • 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
    • B24B21/12—Machines or devices using grinding or polishing belts; Accessories therefor for grinding plane surfaces involving a contact wheel or roller pressing the belt against the work
    • 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
    • B24B21/18—Accessories
    • 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
    • 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
    • B24B49/12—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 involving optical means

Definitions

  • the invention relates to a method for operating a grinding device and a corresponding grinding device.
  • Grinding devices have been known for a long time from the prior art. They have at least one abrasive, which may be, for example, a disc brush, a sanding belt or other abrasive. They are used to grind, deburr, polish or otherwise treat the surfaces of a wide variety of workpieces made of different materials. While an attempt has been made for a long time to treat the surface of the workpiece to be ground in such a way that there are as many as possible no grinding marks, these sanding patterns are increasingly being discovered as a decorative element and deliberately caused. Nevertheless, applications are still known in which a grinding pattern is to be avoided as possible.
  • abrasive which may be, for example, a disc brush, a sanding belt or other abrasive. They are used to grind, deburr, polish or otherwise treat the surfaces of a wide variety of workpieces made of different materials. While an attempt has been made for a long time to treat the surface of the workpiece to be ground in such a way that there are
  • the object to be ground does not always have a flat surface which is parallel to the plane of the abrasive.
  • the article to be sanded has a structured surface which has, for example, elevations and / or depressions.
  • various proposals are known from the prior art.
  • belt grinders having a revolving belt for example, an angle between the direction of rotation of the grinding belt and the conveying direction, along which the workpiece is passed through the device, can be adjusted.
  • the pressure with which the abrasive belt or a disc brush is pressed onto the surface to be ground can also be adjusted.
  • sanding bars are known which have a plurality of juxtaposed pressure shoes, which can optionally be controlled independently.
  • the invention is therefore based on the object to propose a method for operating a grinding machine and a corresponding grinding machine with which the best possible grinding results can preferably be achieved as independent of the structure and nature of the surface to be ground.
  • the grinding result can be monitored.
  • the electronic data processing device is advantageously able to determine from the detected actual data and the determined deviation from the stored desired data a countermeasure which is suitable for achieving the desired data or at least for the tolerance range of the desired data arrive so that the deviation of the actual data from the target data in the next workpiece to be ground is smaller than the predetermined limit.
  • the electronic data processing device is set up to adapt at least one, possibly also several or even all of the abovementioned grinding parameters.
  • the speed of the abrasive and / or the feed rate of a transport device can be varied.
  • a relative speed of the abrasive is changed to the workpiece, which is transported by the grinding device.
  • a change in the speed of the abrasive, for example, in an abrasive belt is also present when an angle between the direction of movement of the abrasive belt and the feed direction is changed. This also varies the relative speed of the grinding belt and the workpiece to be ground.
  • the pull-in point at which the workpiece is introduced into the grinding machine can be varied. This affects which parts of the abrasive material the workpiece comes into contact with.
  • an additional grinding unit can be switched on or an already used grinding unit can be switched off in order to obtain the desired grinding result.
  • the data acquisition device preferably has at least one optical system which has at least one camera and preferably at least one light source.
  • the optical system is set up to acquire data from at least part of the surface, preferably the entire surface. This detection and in particular the subsequent processing is preferably done in real time in order to react as quickly as possible to deviations that are greater than the predetermined limit.
  • the camera is preferably a visible light digital camera.
  • An ultraviolet or infrared camera can also be used. If, for example, by grinding the workpiece, the coating of the workpiece with a visible, for example, only visible in the infrared substance, this can only be tested by an optical sensor, so a camera is used, which can detect and process radiation in the infrared range.
  • a suitable for the camera light source is used to ensure the best possible illumination of the surface to be detected with the radiation required for the camera.
  • the surface is irradiated with an electromagnetic radiation from an irradiation direction when the data acquisition device detects the data of the surface, wherein the irradiation direction is preferably not perpendicular to the surface and / or not perpendicular to a feed direction of the transport device.
  • an oblique illumination of the surface can be achieved up to the grazing incidence of the electromagnetic radiation, which in particular unevenness easily be recognized because they throw a striking shadow of electromagnetic radiation.
  • This is particularly advantageous when the smoothest possible surface is to be produced, which has no or only little three-dimensional structures.
  • the method can also be used on other surfaces.
  • an actual grinding pattern is extracted from the actual data, which is compared with a desired grinding pattern.
  • the workpiece is fed to at least one abrasive.
  • This additional abrasive may be part of the same grinder or part of another grinder. It is used to adjust the grinding result from which the actual data originates to the target result.
  • the actual data is detected by a data acquisition device. If a comparison with the target data shows that the deviation is greater than the predetermined limit value, the quality of the ground surface obviously does not fulfill the desired properties and tolerances.
  • the workpiece is thus normally considered scrap and removed from the further production cycle.
  • the deviation is that too little material has been removed from the surface of the workpiece, this can be corrected by supplying the workpiece to another abrasive.
  • the amount of rejects can consequently be reduced, so that the method as a whole becomes more productive and thus more cost-efficient.
  • a change of the grinding result is determined from the actual data, which are acquired at different times, on the basis of which a state of the at least one abrasive is determined.
  • the method for operating the grinding device is preferably carried out several times in succession.
  • actual data are preferably acquired by a plurality of workpieces to be ground after grinding. From this a temporal course of the grinding result can be determined, which is especially, but not exclusively, then is advantageous and particularly simple if the workpieces to be ground are identical or at least very similar. From a change in the grinding result with otherwise preferably unchanged grinding parameters can be concluded that the state of the abrasive.
  • a change time is determined from this, in which the at least one abrasive is exchanged. If, for example, it turns out that a part of the abrasive is already worn out by frequent use and the desired grinding result can not be achieved with this part of the abrasive, a grinding parameter can first be adapted. This is, for example, the pull-in point at which the workpiece comes into contact with the abrasive and / or a pressure with which the abrasive is pressed against the workpiece.
  • the abrasive must be replaced. This can be recognized by the electronic data processing device already in advance, so that the change time can be determined in advance.
  • an optical and / or acoustic signal is output when the changeover time has been reached.
  • an operator of the grinding device can be informed that the abrasive must be replaced.
  • the abrasive to be exchanged with the corresponding grinding unit is switched off at this time and removed from the grinding process.
  • this replaced and switched off grinding unit is replaced by an identical or similar grinding unit, so that even when replacing the abrasive in the removed from the grinding process grinding unit further workpiece can be edited.
  • the invention solves this problem by a grinding device with at least one abrasive, at least one data acquisition device and at least one electronic data processing device, which is adapted to perform a method of the type described herein.
  • the actual data of the at least one abrasive means are detected by means of at least the data acquisition device. These are preferably compared with target data stored in an electronic data memory in an electronic data processing device. From this we determine a change time at which the at least one abrasive is changed.
  • the acquired actual data must be selected in such a way that they permit a statement about the condition of the abrasive.
  • the actual data are preferably recorded directly on the abrasive.
  • it is also possible to indirectly infer the condition of the abrasive for example by the actual data concerning the grinding quality and thus the grinding result.
  • the actual data are advantageously recorded at different times, so that a temporal course results.
  • the change time can be determined, for example, by extrapolating when the abrasive will no longer have the quality required for the desired grinding result.
  • the at least one abrasive is changed when the change time is reached.
  • the electronic data acquisition device has an optical system which has at least one camera and / or preferably a light source.
  • the light source is used to illuminate the abrasive at least at the locations detected by the camera.
  • the camera is able to detect electromagnetic radiation. This can be in the visible light spectrum, in the UV range and / or in the infrared range.
  • the detected actual values relate to the length and / or the color of the abrasive.
  • the actual values relate to a different parameter of the abrasive belt that changes with increasing wear of the abrasive belt. For example, if the abrasive article is a brush head having abrasive elements projecting from a carrier, the length of these abrasive elements will change as the abrasive wears. This length can thus be detected. Once the length falls below a predetermined limit, the abrasive is considered to be no longer of sufficient quality to achieve the desired grinding result so that it must be changed.
  • this abrasive belt has a base body which is coated with the actual abrasive, for example sand or granules.
  • the actual abrasive for example sand or granules.
  • the abrasive belt it can be detected how much abrasion of the surface of the workpiece to be ground is on the abrasive belt.
  • the fresher and newer the abrasive belt is the deeper are the recesses between the individual sand or granule elements that make up the actual abrasive element. The deeper these spaces are, the more abrasion is between them.
  • this color can also be detected. Once the color of the abrasion in the captured image subsides, it can be deduced on the decreasing depth of the individual wells between the sand or granules elements. This results in information about the condition of the abrasive.
  • the length of the abrasive material over a distance of the abrasive carrier on which the at least one abrasive is arranged on the surface of the workpiece and / or by a transport device, by which the workpiece is transported by the grinding device determined.
  • This is particularly advantageous if it is a grinding brush that has several individual grinding elements that protrude from the abrasive carrier.
  • the length of the abrasive elements is the criterion from which the statement about the state of the abrasive is extracted.
  • the grinding device has a plurality of abrasives, of which preferably at least two are formed differently. These can be brush sanding elements, sanding belts or other grinding machines.
  • the data acquisition device has an optical system with at least one camera and / or at least one optical sensor, wherein the optical system advantageously also has at least one light source.
  • the light source of the grinding device is a lighting device for illuminating the surface of the workpiece when detecting the actual data.
  • FIG. 1 shows a grinding device 1, which has a transport device through which a workpiece can be conveyed through the grinding device 1.
  • the workpiece moves from an inlet 2 of the grinding device to an outlet 2 'of the grinding device 1. It is transported at a transport speed v along the in FIG. 1 shown arrow moves.
  • a data acquisition device 4 which is set up to detect actual data of the surface of the workpiece after grinding.
  • the grinding device 1 also has an illumination device 3, which is set up to illuminate the region of the surface of the workpiece detected by the data acquisition device 4 with electromagnetic radiation.
  • the Actual data acquired by the data acquisition device 4 are supplied to an electronic data processing device 7 and processed there and, in particular, compared with reference data stored in an electronic data memory, which is not shown and preferably part of the electronic data processing device 7.
  • the grinding device 1 also has a further data acquisition device 9, which is also associated with a lighting device 8.
  • the illumination device 8 illuminates a part of the surface of the workpiece in the region of the inlet 2 of the grinding device 1.
  • the illuminated area is detected by the data acquisition device and actual data is detected before the grinding.
  • a third data acquisition device 6 is provided to detect actual data of at least part of an abrasive 11, preferably of the entire abrasive 11.
  • this data acquisition device 6 is associated with a corresponding illumination device 5, is illuminated by the at least a portion of the abrasive 11 with an electromagnetic radiation.
  • the actual data of this data acquisition device 6 are also supplied to the electronic data processing device 7.
  • the electronic data processing device 7 generates control signals which are supplied to a control device 10 which is arranged to control at least one operating parameter of the grinding device and to modify it on the basis of the control signals.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
EP19158153.7A 2018-03-06 2019-02-19 Procédé de fonctionnement d'un dispositif de meulage Withdrawn EP3536452A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102018105133.6A DE102018105133A1 (de) 2018-03-06 2018-03-06 Verfahren zum Betreiben einer Schleifvorrichtung

Publications (1)

Publication Number Publication Date
EP3536452A1 true EP3536452A1 (fr) 2019-09-11

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EP19158153.7A Withdrawn EP3536452A1 (fr) 2018-03-06 2019-02-19 Procédé de fonctionnement d'un dispositif de meulage

Country Status (5)

Country Link
US (1) US11679471B2 (fr)
EP (1) EP3536452A1 (fr)
CN (1) CN110227993A (fr)
DE (1) DE102018105133A1 (fr)
TW (1) TWI862486B (fr)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
CN117359445A (zh) * 2023-12-08 2024-01-09 广东中乐建设集团有限公司 一种建筑钢结构用抛光装置

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DE102020110470A1 (de) 2020-04-17 2021-10-21 Glaß & Wolff Metalltechnik GmbH & Co. KG Schleifvorrichtung zum Schleifen von Schneideinheiten und Aufbereitungsanlage zum Aufbereiten von gebrauchten Schneideinheiten
DE102020119149A1 (de) 2020-07-21 2022-01-27 Karl Heesemann Maschinenfabrik Gmbh & Co. Kg Verfahren zum Schleifen einer Oberfläche eines Werkstückes und Vorrichtung dazu
CA3224869A1 (fr) * 2022-12-27 2024-06-27 Pratt & Whitney Canada Corp. Polissage de rotor a aubes au moyen d~un dispositif de polissage robotique
DE102023200881A1 (de) * 2023-02-03 2024-08-08 Nagel Maschinen- und Werkzeugfabrik Gesellschaft mit beschränkter Haftung. Schleifmaschine und Schleifverfahren zum Schleifen beschichteter Bremsscheiben
DE102023113967A1 (de) 2023-05-26 2024-11-28 Karl Heesemann Maschinenfabrik Gmbh & Co. Kg Schleifmaschine zum Schleifen einer Oberfläche eines Objektes

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EP0302565A2 (fr) * 1987-08-03 1989-02-08 KADIA-Diamant Maschinen- und Werkzeugfabrik O. Kopp GmbH & Co. Outil pour l'usinage par enlèvement de copeaux
DE102007012780A1 (de) * 2006-03-21 2007-09-27 Hans Weber Maschinenfabrik Gmbh Vorrichtung zum optischen Erfassen von Umriss und Oberflächeneigenschaften flächiger Werkstücke in einer Breitbandschleifmaschine
WO2009023979A1 (fr) * 2007-08-17 2009-02-26 L. Kellenberger & Co. Ag Procédé et dispositif d'usinage de pièces
DE102008027050A1 (de) * 2008-06-06 2009-12-10 Grenzebach Maschinenbau Gmbh Verfahren und Vorrichtung zum automatischen Kanten - Schleifen von Glasplatten unter Reinraumbedingungen
DE102009039093A1 (de) * 2009-08-27 2011-03-03 Bayerische Motoren Werke Aktiengesellschaft Verfahren und System zum automatischen Schleifen und Polieren von lackierten Teilen
US20110223833A1 (en) * 2010-03-09 2011-09-15 Nagel Maschinen-Und Werkzeugfabrik Gmbh Method and apparatus for the measurement-aided fine machining of workpiece surfaces, and measuring system
WO2015097146A2 (fr) * 2013-12-23 2015-07-02 Hydro Aluminium Rolled Products Gmbh Dispositif de rectification de cylindre et procédé de rectification d'un cylindre

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117359445A (zh) * 2023-12-08 2024-01-09 广东中乐建设集团有限公司 一种建筑钢结构用抛光装置
CN117359445B (zh) * 2023-12-08 2024-02-13 广东中乐建设集团有限公司 一种建筑钢结构用抛光装置

Also Published As

Publication number Publication date
TW201940279A (zh) 2019-10-16
US11679471B2 (en) 2023-06-20
US20190275636A1 (en) 2019-09-12
TWI862486B (zh) 2024-11-21
CN110227993A (zh) 2019-09-13
DE102018105133A1 (de) 2019-09-12

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