EP2815844B1 - Réglage de l'épaisseur pour meuleuses - Google Patents

Réglage de l'épaisseur pour meuleuses Download PDF

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Publication number
EP2815844B1
EP2815844B1 EP14173250.3A EP14173250A EP2815844B1 EP 2815844 B1 EP2815844 B1 EP 2815844B1 EP 14173250 A EP14173250 A EP 14173250A EP 2815844 B1 EP2815844 B1 EP 2815844B1
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EP
European Patent Office
Prior art keywords
thickness
grinding
workpiece
actual
finished
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Application number
EP14173250.3A
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German (de)
English (en)
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EP2815844A1 (fr
Inventor
Thomas Bettermann
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Weeke Bohrsysteme GmbH
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Weeke Bohrsysteme GmbH
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Priority to PL14173250T priority Critical patent/PL2815844T3/pl
Publication of EP2815844A1 publication Critical patent/EP2815844A1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • 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
    • 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
    • B24B27/00—Other grinding machines or devices
    • B24B27/0023—Other grinding machines or devices grinding machines with a plurality of 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
    • B24B27/00—Other grinding machines or devices
    • B24B27/0076—Other grinding machines or devices grinding machines comprising two or more grinding 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
    • 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
    • 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
    • B24B7/06—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor involving conveyor belts, a sequence of travelling work-tables or the like

Definitions

  • the invention relates to a grinding machine for machining workpieces made of wood, wood composites, plastic, metals and similar materials.
  • the invention further relates to a method for grinding a workpiece using the grinding machine according to the invention.
  • a generic grinding machine is for example from the European patent specification with the number EP 0 571 343 A1 known.
  • the grinding machine has a grinding unit. for grinding a workpiece.
  • the actual grinding process is accomplished within the grinding aggregate by a grinding device.
  • the grinder has the EP 0 571 343 A1 via a belt grinding device.
  • the grinding machine is the EP 0 571 343 A1 characterized by a conveying device which conveys the workpiece by the grinding unit.
  • the grinding unit and the conveying device are controlled by a control device.
  • the grinding effect is measured here not only from the interaction of grinding unit and conveying device, but also depends on the nature of the workpiece.
  • the thickness of the machined, ie ground workpiece from the raw thickness of the workpiece In order to achieve a certain grinding effect, it is therefore necessary to adapt the grinding machine and the grinding process to the raw thickness of the workpiece.
  • the grinding machine when operated, for example due to vibrations or due to a varying raw thickness, undesired deviation in the material thicknesses of the machined workpieces can occur, which significantly increases the scrap during the machining of workpieces.
  • the DE 199 03 842 A1 relates to a method for grinding workpieces, in particular blades of knives, scissors, hand tools or the like, wherein the workpiece is moved relative to a grinder body for performing the grinding and detects the wear thereof to compensate for the abrasion of the grinding body by a first measuring system after a grinding process and according to a measured Verschleifshunt an adjustment of the grinding distance between the grinding wheel and workpiece takes place in dependence on the desired grinding size.
  • the object of the invention is to provide a grinding machine with the aid of which the broke can be treated with respect to processed, i. sanded workpieces can be reduced. Further, it is an object of the present invention to provide a method which reduces the amount of machined workpieces using a grinding machine.
  • the inventive grinding machine for machining workpieces comprises in particular at least one grinding unit for grinding a workpiece, wherein the at least one grinding unit has at least one preferably vertically adjustable grinding device.
  • the grinding machine further comprises a conveying device for conveying the workpiece in a direction of passage through the at least one grinding unit, and a control device which is adapted to tune the operation of the at least one grinding unit to a finished dimension desired thickness of the workpiece.
  • the term vertical refers to one direction parallel to the thickness direction of the workpiece.
  • the finished target thickness is the desired thickness that a workpiece should have after being processed by the grinder.
  • the conveying direction of the conveying device can be reversible in order to convey a workpiece against the passage direction.
  • the grinding machine according to the invention is characterized in that it further comprises a thickness-matching device which is arranged in the direction of passage after the at least one grinding unit, wherein the thickness-determining device can determine a finished actual thickness of the workpiece processed by the at least one grinding aggregate.
  • the grinding machine according to the invention is further characterized in that the control device is further adapted to match the finished dimension actual thickness of the workpiece with the finished dimension target thickness, and to control the operation of the at least one grinding unit such that the finished dimension actual thickness of the finished dimension target thickness is adjusted ,
  • the finished actual thickness is the thickness that the workpiece actually has after being processed by the grinding machine.
  • a thickness determination device which determines the finished actual thickness of the machined workpiece and a control device which adjusts this finished actual thickness with the finished dimension desired thickness and controls the operation of the grinding aggregate such that the finished actual thickness of the finished dimension target thickness is adjusted makes it possible to compensate for fluctuations in the operation of the grinding machine and in the nature of the unprocessed workpiece directly, whereby the reject can be reduced.
  • the thickness determination device and the suitably adapted control device adaptation to changed operating conditions can be made directly during the operation of the grinding machine, without the Machine must be stopped and rebuilt.
  • the grinding machine according to the invention enables a continuous and complete monitoring of the machined workpieces, whereby a possible faulty production can be detected and corrected immediately.
  • the grinding machine according to the invention has a second thickness determining device, which is arranged in the direction of passage in front of the at least one grinding unit.
  • the raw material actual thickness of the unprocessed workpiece can be determined with the second thickness determination device, and the control device is furthermore suitable for matching the raw stock actual thickness of the workpiece to the raw stock target thickness and controlling the operation of the at least one grinding aggregate based on the balance of the raw material.
  • Actual thickness to be controlled with the Rohhffy target thickness such that a thickness of the machined by the at least one grinding unit workpiece is adjusted as possible the finished dimension target thickness. This makes it possible to adapt the grinding process to the thickness of the workpiece already before starting the machining of the workpiece. This pre-adjustment can further reduce the scrap.
  • the raw material actual thickness is the actual thickness of the workpiece before it is processed by the grinding machine.
  • the raw gauge target thickness is the desired thickness of the workpiece before it is machined.
  • control device is furthermore suitable for adapting the finished dimension actual thickness of the workpiece to the finished dimension setpoint thickness and the adaptation based on the adjustment of the raw dimension actual thickness the Rohhffy target thickness by issuing a total grinding depth to the at least one grinding unit to accomplish.
  • the grinding depth can preferably be accomplished by a method of the grinding device (s) together or individually in the vertical direction or by a change in the contact pressure with which the grinding device (s) are applied by the grinding units to the workpiece.
  • the grinding machine according to the invention is adapted to cooperate with a pressure bar and to control this on the basis of the measurements of the raw material actual thicknesses and / or finished actual thicknesses.
  • the grinding machine is further characterized by comprising a top grinding grinding aggregate which grinds the workpiece at the top of the workpiece and a bottom grinding grinding aggregate which grinds the workpiece at the bottom of the workpiece ,
  • Both grinding units, the abrasive grinding machine from above and the abrasive grinding machine from below have a preferably vertically adjustable grinding device.
  • the term "top” refers to a position above the workpiece, which is conveyed by the conveyor through the grinding unit.
  • the abrading grinding unit is thus arranged above the workpiece and performs a grinding operation at the top of the workpiece.
  • bottom The grinding from below grinding unit is arranged below the conveyed by the conveyor by the grinding unit workpiece.
  • the sanding grinding unit grinds the workpiece on its underside.
  • the total grinding depth is divided in equal parts to a grinding depth of the abrasive grinding machine from above and a grinding depth of the abrasive grinding machine from below.
  • the thickness determination device and the second thickness determination device preferably each have at least one sensor pair with an upper sensor, a lower sensor and an evaluation device.
  • the lower sensor is arranged in relation to the conveyed by the conveying device workpiece such that it is located below the workpiece.
  • the upper sensor is then arranged to be in a direction parallel to the thickness direction of the workpiece above the workpiece and above the lower sensor.
  • the upper and lower sensors occupy a predetermined distance from each other.
  • Upper and lower sensors are preferably laser optics sensors.
  • the upper sensor of a sensor pair is suitable for determining an upper distance from the workpiece
  • the lower sensor of a sensor pair is suitable for determining a lower distance from the workpiece.
  • Each evaluation device of a sensor pair is also suitable, based on the pair of sensors, to determine a single finished dimension actual thickness or a single raw dimension actual thickness of the workpiece starting from the predetermined distance, the upper distance and the lower distance.
  • the thickness of the workpiece preferably results from the difference between the predetermined distance minus the upper distance minus the lower distance.
  • control device is also suitable, an average of the individual finished dimension actual thicknesses and / or from to determine the individual raw material actual thicknesses in order to obtain the finished dimension actual thickness and / or the raw stock actual thickness.
  • the thickness-determining device and the second thickness-determining device each have n sensor pairs which are distributed uniformly over the working width of the at least one grinding aggregate.
  • n is preferably three. This makes it possible to grasp the raw stock actual thickness of the workpiece and / or the finished actual thickness of the workpiece over the entire width of the workpiece, which reduces the susceptibility to errors and thus the rejection of the system.
  • This arrangement is also advantageous in an optional control of a pressure beam, since it can also compensate for differences in thickness of the workpiece over the working width (i.e., when a workpiece is skewed with respect to the working width).
  • the sensor pairs can be arranged horizontally within the thickness determination device and the second thickness determination device, which makes it possible to adapt the sensor position to the working width.
  • each sensor has a measuring range
  • the evaluating devices of the sensor pairs are suitable for determining a single finished actual thickness or a single raw dimension actual thickness of the workpiece, if both the upper distance and the lower distance smaller or equal to the measuring range.
  • the grinding device (s) of the grinding machine according to the invention are / are oscillating grinding devices, a belt grinding device, disc brushes or grinding rollers.
  • the grinding machine further comprises a display device capable of continuously displaying the raw stock actual thickness and the finished actual thickness.
  • the display device is adapted to display time average values of the raw stock actual thickness and the finished actual thickness based on the time average of the raw stock actual thickness and the finished actual thickness over a predetermined time interval.
  • the display device is adapted to display a message that causes a user to perform an action when the finished actual thickness deviates by a predetermined amount from the finished target thickness and / or the finished actual thickness over a predetermined time interval by a predetermined amount of deviates from the finished dimension target thickness. This not only makes it possible to track the time course of the raw stock actual thickness and the finished actual thickness and to carry out a continuous quality control, it also makes it possible to induce the user of the grinding machine in the event of a malfunction to early intervention.
  • the grinding machine may further comprise a warning device capable of displaying a warning when the finished dimension actual thickness deviates from the finished dimension target thickness by a predetermined amount and / or the finished actual thickness over a predetermined time interval deviates a predetermined amount from the finished dimension target thickness.
  • the present invention includes a method using the aforementioned grinding machine.
  • the method comprises the steps of: determining a finished dimension actual thickness of the workpiece processed by the at least one sanding unit by the thickness determination device; Matching the finished dimension actual thickness of the workpiece with the finished dimension desired thickness by the control device; and controlling the operation of the at least one grinding aggregate by the control device in such a way that the finished dimension actual thickness as a whole is adapted to the finished dimension setpoint thickness.
  • the particular advantage of the method lies in the fact that with the exception of the thickness determination device and an adaptation of the control device can be made of the facilities of conventional grinding machines. This makes it possible to reduce the waste in the machining of workpieces cost and uncomplicated.
  • the method comprises the steps of: determining a raw-material actual thickness of the unprocessed workpiece by a second thickness-determining device; Balancing the raw stock actual thickness of the workpiece with the finished dimension target thickness; and controlling the operation of the at least one grinding aggregate by the control device such that a thickness of the workpiece processed by the at least one grinding aggregate is adjusted overall as far as possible to the finished dimension desired thickness.
  • the method according to the invention is further distinguished by the fact that an overall grinding depth is output to the at least one grinding unit for adjusting the finished dimension actual thickness of the workpieces to the finished dimension desired thickness and for adjustment based on the comparison of the raw dimension actual thickness with the raw dimension target thickness.
  • the total grinding depth is preferably divided equally into the grinding depth of the abrading grinding aggregate and the grinding depth of the abrading grinding aggregate.
  • the method according to the invention is preferably characterized in that average values are formed from the individual finished dimension actual thicknesses obtained from individual sensor pairs and / or the individual raw dimension actual thicknesses obtained from individual sensor pairs, the actual finished thickness and / or the raw gauge actual thickness to obtain.
  • FIG. 1 a grinding machine 1 according to an embodiment of the present invention is shown in a schematic sectional view.
  • Other modifications mentioned in this context can each be combined with each other to form new embodiments.
  • the essential elements of the grinding machine 1 are the grinding units 10, the conveying device 5 and the control device 100. Furthermore, the grinding machine 1 can be mounted on a supporting device, not shown in this view.
  • the conveying device 5 conveys a workpiece 2 in a direction of passage R.
  • the workpiece 2 is conveyed by the grinding units 10.
  • the grinding machine 1 may have a plurality of grinding units 10.
  • the grinding units 10 have preferably vertically adjustable grinding devices 12. These grinding devices 12 may comprise an oscillating grinding device, a disc brush, or a grinding roller. It may be advantageous if the conveying device 5 is reversible in its conveying direction, thus to promote a workpiece 2 against the passage direction R. This can not only be of concern in case of malfunctioning of the grinding machine but can also be used to obtain special grinding results.
  • a thickness determination device 30 is initially arranged in the direction of passage R downstream of the grinding units 10. The thickness determination device 30 is suitable for determining a finished actual thickness of the workpiece 2 processed by the grinding aggregates 10. This finished dimension actual thickness is input to the controller 100.
  • the control device 100 is suitable for matching the finished dimension actual thickness with a finished dimension desired thickness.
  • the finished target thickness corresponds to the desired thickness of the workpiece 2, which should have this after the grinding process by the grinding units 10. Based on the comparison of the finished actual thickness with the finished target thickness, the control device 100 controls the grinding units 10. In this case, the control takes place in such a way that the finished dimension actual thickness of the finished dimension desired thickness is adjusted.
  • the adaptation can take place by means of a vertical method of the grinding devices 12, a change in the conveying speed and / or a change in the contact pressure with which the grinding devices 12 are applied to the workpiece 2.
  • the thickness determining device 30 has a plurality of sensor pairs 33, each comprising a lower sensor 32 and an upper sensor 31. Furthermore, each sensor pair 33 has an evaluation device 34.
  • the upper sensor 31 is arranged with respect to the workpiece 2 at a predetermined distance just above the lower sensor 32, so that the workpiece 2 can be conveyed between the upper and the lower sensor.
  • the predetermined distance between upper sensor 31 and lower sensor 32 of a sensor pair 33 is parallel to the thickness direction of the workpiece 2.
  • the sensors 31, 32 can be of very different types.
  • the sensors 31, 32 laser optics sensors.
  • the thickness determination device 30 has a plurality of pairs of sensors 33, which are arranged uniformly over the working width b of the grinding machines. Preferred, and how FIG. 3 In addition, provision may be made for the sensor pairs 33 to be arranged so as to be horizontally displaceable in the thickness determination device, whereby, for example, adaptation to the working width of the grinding units can be carried out.
  • the upper sensor 31 and the lower sensor 32 are at a (known) predetermined distance. If a workpiece 2 is located between the upper sensor 31 and the lower sensor 32, the lower sensor 32 determines a lower distance (a distance from the lower sensor 32 to the lower side of the workpiece 2) and the upper sensor 31 an upper distance (a distance from the upper Sensor 31 to the top of the workpiece 2). The upper distance and the lower distance are entered into the evaluation unit 34 of the sensor pair 33. Based on the given distance, the upper distance and the lower distance, this evaluation device 34 determines a single finished actual thickness of the workpiece 2. The individual finished dimension actual thickness of the workpiece 2 results from the difference between the given distance minus the upper distance minus the lower distance.
  • the individual finished dimension actual thicknesses of the workpiece 2 determined by each sensor pair 33 are input by the evaluation devices 34 into the control device 100. This calculates from these individual finished actual thicknesses of the workpiece 2 by arithmetic averaging the finished dimension actual thickness of the workpiece 2. This finished dimension actual thickness of the workpiece 2 is adjusted by the control device 100 with the finished dimension desired thickness. This information is then used, as mentioned above, to control the grinding units 10.
  • the individual finished actual thicknesses can be used without averaging to control a pressure bar.
  • Each sensor 31, 32 also has a measuring range, and the evaluation devices 34 are adapted to output a single thickness of the workpiece 2 to the control device 100 only if both the determined lower distance, and the determined upper distance respectively within the measuring ranges of lower sensor 32 and the upper sensor 31 are located. This ensures that, firstly, there is no malfunction of the thickness determination device 30, and second, that only when a single thickness is input into the control device 100 when a workpiece 2 lies between the upper sensors 31 and the lower sensors 32 of a sensor pair 33.
  • the grinding machine of the present invention not only have a thickness determining device 30 which is downstream of the grinding units 10 in the direction of passage, but may in a further embodiment rather have a second thickness determining means 40 which lies in the direction of flow R in front of the grinding units 10.
  • this second thickness determination device 40 which is otherwise constructed in accordance with the thickness determination device 30, it is now possible to determine one or more individual raw dimension actual thicknesses of the workpiece 2 before the workpiece 2 is processed by the grinding units 10.
  • These raw-sheet actual thicknesses are then input to the control device 100, which is suitable for determining therefrom an average value of the raw-material actual thickness of the workpiece 2, and to match this with the raw-material nominal thickness.
  • the control device 100 is also set up, the operation of the grinding units 10th based on the balance of the raw dimension and target thicknesses to be controlled so that a thickness of the machined by the grinding units 10 workpiece 2 total as possible corresponds to the finished dimension target thickness.
  • each pair of sensors 33 each determines a single raw tube actual thickness, which are then converted by averaging by the control device 100 in the Rohhsted actual thickness.
  • the individual raw tube actual thicknesses are in each case determined from the difference between the predetermined distance of a sensor pair 33 minus the upper distance minus the lower distance.
  • the sensors 31, 32 also have a measuring range in the raw dimension / actual thickness determination, and the evaluation devices 34 are suitable for outputting a single thickness of the workpiece 2 to the control device 100 only if both the determined lower distance and the determined upper one Distance each within the measuring ranges of the lower sensor 32 and the upper sensor 31 are.
  • the individual raw material actual thicknesses can be used without averaging to control a pressure bar.
  • control device 100 calculates a total grinding depth from the discrepancy between the finished dimension actual thickness and the finished dimension nominal thickness or raw basic actual thickness and the nominal raw thickness. This total grinding depth can then advantageously be divided equally between the several grinding units 10.
  • an abrasive aggregate 10 is a top grinding grinding aggregate 10a while the other grinding unit 10 is a bottom grinding grinding unit 10b.
  • the abrading abrading grinding unit 10a has, as in FIG. 2 shown via vertically adjustable grinding devices 12, which are the upper side of the workpiece 2, with respect to the passage direction R of the workpiece 2, held from above.
  • the grinding unit 10b which grinds from below, has vertically adjustable grinding devices 12, which are held against the workpiece 2, relative to the direction of passage R, on its underside.
  • the abrading grinding aggregate 10a grinds the workpiece 2 at the top thereof
  • the abrading grinding aggregate 10b grinds the workpiece 2 at the bottom thereof.
  • the term "vertically adjustable” refers to a displacement of the grinding devices 12 in the thickness direction of the workpiece 2 and / or a change in the pressure with which the grinding devices 12 are held against the workpiece 2, whereby the grinding depth can be adjusted. Be as in FIG. 2 1, it is advantageous if the total grinding depth is divided equally between the grinding unit 10a grinding from above and the grinding unit 10b grinding downwards. As a result, the deviations determined, or the corrections required in the grinding depth, can be uniformly distributed over the grinding depth of the two grinding units, as a result of which a uniform removal can be achieved on both sides.
  • the grinding machine 1 may further comprise a display device 200. This is particularly suitable for continuously displaying the raw-material actual thickness and the final-dimension actual thickness and also calculating and displaying various time average values of the raw-material actual thickness and the finished-actual thickness based on the time average of both values over a predetermined time interval.
  • the display device 200 may be suitable be to indicate a message that causes a user to perform an action when the finished actual thickness deviates by a predetermined amount from the finished target thickness and / or the finished actual thickness over a predetermined time interval by a predetermined amount from the finished target thickness differs.
  • the grinding machine may further comprise a warning device which is suitable for issuing a warning in the abovementioned case, which preferably takes place acoustically and / or optically.
  • the finished thickness of the machined workpiece 2 is determined using the thickness determining device 30 and, if appropriate, a raw raw thickness of the unprocessed workpiece 2 determined using the second thickness determining device 40
  • Finished dimension actual thickness of the workpiece 2 is adjusted by the control device 100 with the finished dimension desired thickness, as well as this is adjusted if necessary, the raw material actual thickness of the workpiece 2 with the raw target nominal thickness. These adjustments are the basis for controlling the operation of the grinding units 10 by the control device 100 such that the finished dimension actual thickness is adjusted in total to the finished dimension desired thickness.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)

Claims (12)

  1. Meuleuse (1) pour l'usinage de pièces (2) qui se composent de préférence au moins par sections de bois, matériaux composites de bois, plastiques, métaux et matériaux similaires :
    - au moins un groupe de meulage (10) avec un dispositif de meulage de préférence à réglage vertical (12) pour le meulage d'une pièce (2) ;
    - un dispositif de transport (5) pour le transport de la pièce (2) dans une direction de passage (R) à travers le au moins un groupe de meulage (10) ;
    - un dispositif de commande (100) qui est approprié pour adapter le fonctionnement du au moins un groupe de meulage (10) à l'épaisseur théorique de dimension finale de la pièce (2) ;
    - un second dispositif de détermination d'épaisseur (40) qui est agencé dans la direction de passage (R) avant le au moins un groupe de meulage (10), une épaisseur réelle de dimension brute de la pièce non usinée (2) pouvant être déterminée par le second dispositif de détermination d'épaisseur (40), caractérisée en ce que :
    - la meuleuse (1) présente en outre un dispositif de détermination d'épaisseur (30) qui est agencé dans la direction (R) après le au moins un groupe de meulage (10) et par lequel l'épaisseur réelle de dimension finale de la pièce (2) usinée par le au moins un groupe de meulage (10) peut être déterminée ;
    - le dispositif de commande (100) qui est de plus approprié pour ajuster l'épaisseur réelle de dimension finale de la pièce (2) sur l'épaisseur théorique de dimension finale et commander le fonctionnement du au moins un groupe de meulage (10) de telle manière que l'épaisseur réelle de dimension finale soit adaptée à l'épaisseur théorique de dimension finale ; et
    - le dispositif de commande (100) qui est en outre approprié pour ajuster l'épaisseur réelle de dimension brute de la pièce (2) sur l'épaisseur théorique de dimension brute et, en se basant là-dessus, commander le fonctionnement du au moins un groupe de moulage (10) de telle manière que l'épaisseur de la pièce usinée (2) soit adaptée dans l'ensemble le plus possible à l'épaisseur théorique de dimension finale, et effectuer l'adaptation de l'épaisseur réelle de dimension finale de la pièce (2) à l'épaisseur théorique de dimension finale et l'adaptation en se basant sur l'ajustement de l'épaisseur réelle de dimension brute sur l'épaisseur théorique de dimension brute par transmission d'une profondeur de meulage totale au au moins un groupe de meulage (10).
  2. Meuleuse (1) pour l'usinage de pièces (2) selon la revendication 1, la meuleuse (1) étant caractérisée en ce qu'elle présente :
    un groupe de meulage (10a) meulant par le haut avec un dispositif de meulage (12) de préférence à réglage vertical qui meule la pièce sur la face supérieure de la pièce et
    un groupe de meulage (10b) meulant par le bas avec un dispositif de meulage (12) de préférence à réglage vertical qui meule la pièce sur la face inférieure de la pièce,
    dans laquelle la profondeur de meulage totale est de préférence distribuée en parties identiques en une profondeur de meulage du groupe de meulage (10a) meulant par le haut et en une profondeur de meulage du groupe de meulage (10b) meulant par le bas.
  3. Meuleuse (1) pour l'usinage de pièces (2) selon l'une quelconque des revendications précédentes, dans laquelle le dispositif de détermination d'épaisseur (30) et le second dispositif de détermination d'épaisseur (40) présentent respectivement au moins une paire de capteurs (33) avec un capteur supérieur (31), de préférence un capteur optique à laser, un capteur inférieur (32), de préférence un capteur optique à laser et un appareil d'évaluation (34), dans laquelle un capteur inférieur (32) est agencé par rapport à la pièce transportée (2) de telle manière qu'il se trouve sous la pièce et un capteur supérieur (31) se trouve au-dessus de la pièce (2) et du capteur inférieur (32) à une distance prescrite du capteur inférieur.
  4. Meuleuse (1) pour l'usinage de pièces (2) selon la revendication 3, dans laquelle le capteur supérieur (31) d'une paire de capteurs (33) est approprié pour capter une distance supérieure à la pièce (2), le capteur inférieur (32) d'une paire de capteurs (33) est approprié pour capter une distance inférieure à la pièce (2) et l'appareil d'évaluation (34) d'une paire de capteurs (33) est approprié pour capter une épaisseur réelle de dimension finale individuelle ou une épaisseur réelle de dimension brute individuelle de la pièce (2) à partir de la distance prescrite, de la distance supérieure et de la distance inférieure,
    dans laquelle le dispositif de commande (100) est de plus approprié de préférence pour déterminer une valeur moyenne des épaisseurs réelles de dimension finale individuelles et/ou des épaisseurs réelles de dimension brute individuelles.
  5. Meuleuse (1) pour l'usinage de pièces (2) selon l'une quelconque des revendications 3 ou 4, dans laquelle le dispositif de détermination d'épaisseur (30) et le second dispositif de détermination d'épaisseur (40) présentant respectivement n paires de capteurs (33) qui sont réparties uniformément sur la largeur de travail b du au moins un groupe de meulage (10), n s'élevant de préférence à 3.
  6. Meuleuse (1) pour l'usinage de pièces (2) selon l'une quelconque des revendications 3 à 5, dans laquelle chaque capteur (31, 32) présente une zone de mesure et les appareils d'évaluation (34) sont appropriés pour déterminer seulement une épaisseur réelle de dimension finale individuelle ou une épaisseur réelle de dimension brute individuelle de la pièce (2) lorsque non seulement la distance supérieure, mais aussi la distance inférieure sont inférieures ou égales à la zone de mesure.
  7. Meuleuse (1) pour l'usinage de pièces (2) selon l'une quelconque des revendications précédentes, dans laquelle le dispositif de meulage (12) est un dispositif de meulage oscillant, un dispositif de meulage à bande, une brosse rotative ou un tambour de meulage.
  8. Meuleuse (1) pour l'usinage de pièces (2) selon l'une quelconque des revendications précédentes, qui présente de plus un dispositif d'affichage (200) qui est approprié pour :
    - indiquer en continu l'épaisseur réelle de dimension brute et l'épaisseur réelle de dimension finale ;
    - indiquer des valeurs temporelles moyennes de l'épaisseur réelle de dimension brute et de l'épaisseur réelle de dimension finale en se basant sur la moyenne temporelle de l'épaisseur réelle de dimension brute et de l'épaisseur réelle de dimension finale pendant un intervalle de temps prédéterminé ; et
    - indiquer un message qui amène un utilisateur à entreprendre une action lorsque l'épaisseur réelle de dimension finale diverge d'une valeur prédéterminée de l'épaisseur théorique de dimension finale et/ou que l'épaisseur réelle de dimension finale diverge pendant un intervalle de temps prédéterminé d'une valeur prédéterminée de l'épaisseur théorique de dimension finale.
  9. Meuleuse (1) pour l'usinage de pièces (2) selon l'une quelconque des revendications précédentes, qui présente de plus un dispositif d'avertissement qui affiche un avertissement lorsque l'épaisseur réelle de dimension finale diverge d'une valeur prédéterminée de l'épaisseur théorique de dimension finale et/ou que l'épaisseur réelle de dimension finale diverge pendant un intervalle de temps prédéterminé d'une valeur prédéterminée de l'épaisseur théorique de dimension finale.
  10. Procédé d'usinage de pièces (2) en utilisant la meuleuse (1) selon l'une quelconque des revendications précédentes, qui comporte les étapes suivantes :
    - la détermination d'une épaisseur réelle de dimension finale de la pièce (2) usinée par le au moins un groupe de meulage (10) en utilisant le dispositif de détermination d'épaisseur (30) ;
    - l'ajustement de l'épaisseur réelle de dimension finale de la pièce (2) sur l'épaisseur théorique de dimension finale par le dispositif de commande (100) ;
    - la commande du fonctionnement du au moins un groupe de meulage (10) par le dispositif de commande (100) de telle manière que l'épaisseur réelle de dimension finale soit adaptée à l'épaisseur théorique de dimension finale ;
    - la détermination d'une épaisseur réelle de dimension brute de la pièce usinée (2) en utilisant le second dispositif de détermination d'épaisseur (40) ;
    - l'ajustement de l'épaisseur réelle de dimension brute de la pièce (2) sur l'épaisseur théorique de dimension brute ;
    - la commande du fonctionnement du au moins un groupe de meulage (10) sur la base de l'ajustement de l'épaisseur réelle de dimension brute sur l'épaisseur théorique de dimension brute par le dispositif de commande (100) de telle manière que l'épaisseur de la pièce usinée (2) soit adaptée le plus possible à l'épaisseur théorique de dimension finale ; et
    - la transmission d'une profondeur de meulage totale au au moins un groupe de meulage (10) pour l'adaptation de l'épaisseur réelle de dimension finale de la pièce (2) à l'épaisseur théorique de dimension finale et pour l'adaptation sur la base de l'ajustement de l'épaisseur réelle de dimension brute sur l'épaisseur théorique de dimension brute.
  11. Procédé d'usinage de pièces (2) selon la revendication 10, dans la mesure où elle dépend de la revendication 2, qui comporte de plus l'étape suivante :
    - la distribution de la profondeur de meulage totale en parties identiques en la profondeur de meulage du groupe de meulage (10a) meulant par le haut et la profondeur de meulage du groupe de meulage (10b) meulant par le bas.
  12. Procédé d'usinage de pièces (2) selon la revendication 10 ou 11, dans la mesure elle dépend de la revendication 4, qui comporte de plus l'étape suivante :
    - la formation d'une valeur moyenne des épaisseurs réelles de dimension finale individuelles obtenues par des paires de capteurs individuelles (33) et/ou des épaisseurs réelles de dimension brute individuelles obtenues par des paires de capteurs individuelles (33) afin d'obtenir l'épaisseur réelle de dimension finale et/ou l'épaisseur réelle de dimension brute.
EP14173250.3A 2013-06-20 2014-06-20 Réglage de l'épaisseur pour meuleuses Active EP2815844B1 (fr)

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DE102021105394A1 (de) * 2021-03-05 2022-09-08 Karl Heesemann Maschinenfabrik Gmbh & Co. Kg Aggregat zum Entgraten und Verrunden von Kanten in einer Flächenschleifmaschine

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