EP3493948A2 - Système d'usinage et procédé d'usinage - Google Patents

Système d'usinage et procédé d'usinage

Info

Publication number
EP3493948A2
EP3493948A2 EP17754106.7A EP17754106A EP3493948A2 EP 3493948 A2 EP3493948 A2 EP 3493948A2 EP 17754106 A EP17754106 A EP 17754106A EP 3493948 A2 EP3493948 A2 EP 3493948A2
Authority
EP
European Patent Office
Prior art keywords
pressure
grinding
workpiece
force
sensor
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
EP17754106.7A
Other languages
German (de)
English (en)
Other versions
EP3493948B1 (fr
Inventor
Thomas Bettermann
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.)
Homag Bohrsysteme GmbH
Original Assignee
Homag Bohrsysteme GmbH
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 Homag Bohrsysteme GmbH filed Critical Homag Bohrsysteme GmbH
Priority to PL17754106T priority Critical patent/PL3493948T3/pl
Publication of EP3493948A2 publication Critical patent/EP3493948A2/fr
Application granted granted Critical
Publication of EP3493948B1 publication Critical patent/EP3493948B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • 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
    • B24B21/08—Pressure shoes; Pressure members, e.g. backing belts
    • 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
    • B24B21/10—Machines or devices using grinding or polishing belts; Accessories therefor for grinding plane surfaces involving a rigid member, e.g. pressure bar, table, pressing or supporting the belt over substantially its whole span
    • 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
    • B24B49/10—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 electrical 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
    • 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
    • B24B49/16—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 load

Definitions

  • the present invention relates to a device for grinding surfaces of a workpiece, which is preferably at least partially formed of wood, wood material, plastic or the like. Furthermore, the present invention relates to a grinding machine and a method.
  • Grinding machines in the prior art comprise support elements with support element segments, the latter being able to be individually adjusted to press a sanding belt against a portion of a workpiece to be machined.
  • the deployment movement of the carrier element segments is initiated by a control device, the information with respect to.
  • the workpiece are supplied.
  • the aim of the present invention is to provide an apparatus and a method with which an abrasive machining can be performed more accurately.
  • Claim 15 relates to a method for processing a workpiece. Further preferred
  • the following advantages can be achieved.
  • the forces measured by the sensors can be stored and analyzed later. If the optimum settings for the application of the machine are known, a direct feedback with suggestions for improvement can be made to the operator.
  • the device according to the invention for grinding a workpiece has a carrier element and a plurality of pressure segments, which are arranged along the carrier element and which are each designed to press a grinding element, in particular a preferably rotating abrasive belt, against a workpiece. Furthermore, the device comprises at least one sensor which serves to detect a pressure force applied by one of the pressure segments to a workpiece. By detecting the pressure force, changing conditions, for example, differences in thickness of a workpiece, detected and these results are used to improve the grinding process.
  • the device comprises pressure segments, which are preferably each electromagnetically movable.
  • Embodiment leads to a fast and accurate control of the corresponding pressure segments.
  • the device comprises a control device, which is set up to compare a pressure force detected by the at least one sensor with a force desired value and to vary a type and / or duration of an actuation of the corresponding pressure segment to achieve the desired force value.
  • a control device which is set up to compare a pressure force detected by the at least one sensor with a force desired value and to vary a type and / or duration of an actuation of the corresponding pressure segment to achieve the desired force value.
  • the grinding result can be kept constant under changing conditions, for example in thickness differences of a workpiece.
  • solenoid actuators are energized with longer or shorter current pulses to vary the corresponding grinding pressure.
  • the aforementioned control device may be the central control device of the device or a decentralized control device arranged in the region or on the carrier element.
  • a sensor is provided for each pressure segment for detecting a compressive force. This is arranged either continuously on the sanding tongue or in sections per pressure segment, for example, attached to the pressure segments, whereby an efficient and holistic detection of the pressure force is ensured.
  • a sensor is attached to the pressure segments, wherein it is preferred that the sensors are designed like a foil. After a pressure force can be determined at each pressure segment, the pressure segments can be monitored individually and their pressure force applied to the workpiece can be regulated if necessary.
  • the film-like design of the sensors allows an extremely compact design.
  • the device can have a grinding tongue which extends along the carrier element, wherein it is preferred that the sensor or sensors is / are provided between the grinding tongue and the carrier element.
  • the sensors or the sensor is attached to the grinding tongue or integrated into the grinding tongue.
  • the grinding tongue is a replaceable component, so that no costly structural changes are necessary in such a sensor mounted.
  • the sensors are provided between the grinding tongue and the respective pressure segment.
  • the pressure segments each have a, preferably plate-shaped, abutment portion for abutment against a grinding belt and a, preferably cylindrical, guide portion for guiding a movement of the pressure segment, whereby the movement is made possible.
  • the preferably foil-like sensor is attached to the grinding element, in particular the grinding belt, facing side of the abutment portion.
  • the device may further include a light bar, which is in particular an LED bar, which can light in sections in different colors, and is designed so that the ratio of the force setpoint and the determined compressive force qualitatively on the lighting in a specific color of the respective Section. This gives the user an optical feedback about this ratio.
  • a light bar which is in particular an LED bar, which can light in sections in different colors, and is designed so that the ratio of the force setpoint and the determined compressive force qualitatively on the lighting in a specific color of the respective Section. This gives the user an optical feedback about this ratio.
  • the LED bar of the device can further preferably shine in a specific color, which signals that the determined pressure force of the corresponding pressure segment is above the predetermined force setpoint. The assignment of a particular color to this excessive pressure can thus be communicated to the user so that the user can react to this event.
  • the determined compressive forces and the corresponding force setpoint can optionally be additionally stored.
  • an evaluation of the stored data can take place at a later time.
  • the determined and stored pressure forces and corresponding force setpoints can optionally be transmitted to an external server.
  • the data collected in this way can be centrally collected, evaluated and reused.
  • data may be forward or backward Machine are transmitted to adjust their characteristics in coordination with the device according to the invention.
  • the device may be configured to transmit the determined pressure force to the control device by means of wireless data transmission, in particular RFID technology. This reduces the weight of the device. Furthermore, the assembly is simplified.
  • the invention relates to a grinding machine with a device according to one of the preceding aspects and to a movement device for bringing about a relative movement between a workpiece and the carrier element.
  • the moving means may comprise a conveyor belt or one or more conveyor belts.
  • the grinding machine is preferably a wide belt sanding machine or a sanding machine
  • the grinding machine may include a workpiece detection device with which a workpiece to be machined is detected. Based on the workpiece detection, one or more pressure segments are actuated to one
  • the carrier element can also be moved, wherein the workpiece is held stationary or likewise moved during the movement of the carrier element.
  • the method according to the invention for machining a workpiece which preferably comprises using a device as described above, comprises:
  • a pressure applied by at least one pressure segment on the workpiece pressure force is detected by a sensor.
  • the detected pressure force is compared with a force setpoint, and the pressure segment is moved to achieve the force setpoint.
  • a grinding result can be kept constant under changing conditions, for example in thickness differences of a workpiece.
  • the following device is provided:
  • Device for grinding a workpiece comprising:
  • a plurality of pneumatically actuated pressure segments disposed along the support member and each configured to press a sanding member, in particular a sanding belt, against a workpiece,
  • At least one sensor for detecting a pressure applied by one of the pressure segments on a workpiece pressure force.
  • the apparatus according to this aspect may have features according to one or more of the aforementioned preferred embodiments or the features recited in one or more of the dependent claims. Also, such a device in the context of a method for Use come as shown in independent claim 16.
  • Fig. 1 shows a detailed view of an embodiment of the device according to the invention.
  • FIG. 2a is a schematic cross-sectional view of FIG
  • Embodiment of the device according to the invention with shut down pressure segments are provided.
  • FIG. 2b is a schematic cross-sectional view of FIG.
  • Embodiment of the device according to the invention with raised pressure segments Embodiment of the device according to the invention with raised pressure segments.
  • Fig. 3 shows a perspective view of
  • FIG. 1 shows a detailed view of a device 10, which in the embodiment explained here is a sanding unit of a wide-belt sanding machine.
  • the device 10 can also be used in a transverse belt sander.
  • the device 10 comprises a carrier element 11 which extends over a machine bed which is not shown in detail in FIGS.
  • the carrier element 11 is located within the housing of the wide-belt sander illustrated in FIG. 3 and extends transversely to the conveying path of a workpiece.
  • a workpiece 1 can be moved by means of a preferably circulating conveyor belt 22 and thereby guided under the carrier element 11.
  • a plurality of guides 16a, 16b, 16c are fixed, which, in the vertical direction, to the machine bed, and thus in the direction of the conveyor belt 22, extend. Magnetic actuators are accommodated in the guides 16a, 16b, 16c.
  • Each of the guides 16a, 16b, 16c communicates with a pressure segment 12a, 12b, 12c, whereby the pressure segments can be moved relative to the guides 16a, 16b, 16c.
  • a pressure segment 12a, 12b, 12c By a movement of a pressure segment 12a, 12b, 12c in the direction of an abrasive belt 21, this, which is explained below, is pressed in sections against a workpiece 1.
  • the pressure segments 12a, 12b, 12c each include a plate-shaped abutment portion 12a 12b 12c to be able to press a grinding belt 21 against a workpiece 1, and a cylindrical guide portion 12a ⁇ ⁇ , 12b ⁇ ⁇ , 12c ⁇ ⁇ for guiding a movement of the pressure segment 12a, 12b, 12c within the respective guide 16a, 16b, 16c.
  • the magnetic actuator received in the respective guide is operated, the corresponding pressure segment is moved vertically downward (toward the conveyor belt 22).
  • a specific current value is supplied thereto.
  • the grinding pressure can be adjusted.
  • the Magnetaktuator is with Current pulses excited to apply depending on the nature and / or length of the current pulses, a higher or lower pressure force on the workpiece. In this way, the grinding pressure is varied.
  • a grinding tongue 15 is provided which extends along the carrier element 11.
  • the grinding tongue 15 is thus provided between the (in the present embodiment over several rollers encircling) grinding belt 21 and the pressure segments 12a, 12b, 12c.
  • the grinding tongue 15 comprises a plurality of sections, comprising a base element 15a and a cushion 15b arranged below it.
  • a holder 17, which is fastened to the carrier element 11, is in contact with the base element 15a and thus holds the grinding tongue 15 on the carrier element 11.
  • a sensor 13a, 13b, 13c is inserted in each case, which are attached to the pressure segments 12a, 12b, 12c according to the present embodiment.
  • the sensors 13a, 13b, 13c are formed flat and can thus advantageously be arranged between a respective pressure segment or grinding tongue 15. With the sensors, a force applied by the respective pressure segment to a section of the workpiece 1, and thus the local grinding pressure, can be determined.
  • the sensors 13a, 13b, 13c communicate with a controller of the apparatus 10 or the wide belt sander.
  • compressive force setpoint values are stored, with which the pressure segments in each case Use case against the workpiece 1 to be pressed.
  • the control device is furthermore set up to compare pressure force actual values, which are detected by the sensors of the actuated pressure segments, with a respective pressure force desired value and to perform a regulation of the pressure force on the workpiece based on this adjustment. In this way, deviations of the workpiece thickness can be taken into account and a uniform local grinding pressure can be made possible.
  • FIG. 3 shows an embodiment of a wide-belt sanding machine with the invention
  • a light bar 23, in particular LED strip, is provided, which extends transversely to the direction of movement of the conveyor belt 22.
  • the light bar 23 is in communication with the control device.
  • the control device can be set up to transmit the determined pressure force in each segment to an external server.
  • This data can be forwarded, for example, for evaluation or information to an upstream machine, for example, to control their processes in this way.
  • the light bar 23 can be lit in sections in different colors, and thus can represent the ratio of the power setpoint and the actual force value qualitatively on the lighting in a specific color of each section. If, for example, a region of the light strip 23 is indicated by means of a red color which is ground with too high a pressure, this can be noticed and / or taken into account by the operating personnel and / or automatically readjusted.
  • the LED bar defines several areas arranged in columns and rows.
  • the rows form eg. several in the machine behind each other
  • Abrasive aggregates By way of example, in the corresponding fields of the columns, the wearer can be shown the degree of wear of the aggregates in a specific segment.
  • a workpiece 1 is applied or placed on the conveyor belt 22.
  • the revolving conveyor belt 22 moves the workpiece 1 in the direction of the carrier element 11, which comprises the plurality of pressure segments 12a, 12b, 12c. Based on the results of a
  • Workpiece recognition device (not shown), which is upstream of the carrier element in the direction of passage of the workpiece and detects the presence of a workpiece, certain pressure segments are moved in the direction of the conveyor belt 22 relative to the support member 11 to bring the abrasive belt 21 in sections with the workpiece 1 in contact.
  • FIG. 2 a shows a cross-sectional view of the embodiment of the device according to the invention with at least some lowered pressure segments, so that the sanding belt 21 is pressed against the workpiece by the lowered pressure segments.
  • Such a movement of the pressure segments 12a, 12b, 12c takes place depending on the configuration of the workpiece 1. If the workpiece 1 is a frame component (such as a window frame), then on the longitudinal sides of the workpiece 1 those pressure segments 12a, 12b, 12c exhibited, with which the grinding belt 21 with corresponding portion of the workpiece 1 to be brought into contact. In the situation illustrated in FIG. 1, there are (in this example four) pressure segments in FIG Edge region in its initial position, while other pressure segments 12a, 12b, 12c are actuated.
  • the detected forces are transmitted to the control device and can be adjusted with appropriate setpoints. Based on this adjustment, the deployment position of the respective pressure segment can be readjusted.
  • This grinding pressure can be, for example, a material-specific or application-specific grinding pressure, which does not have to be changed subsequently after adjustment.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)

Abstract

La présente invention concerne un système de meulage de surfaces d'une pièce qui est réalisée, de préférence au moins en partie, en bois, matériau dérivé du bois, plastique ou similaire. La présente invention concerne également une machine de meulage et un procédé.
EP17754106.7A 2016-08-05 2017-08-02 Dispositif de ponçage et procede de fonctionnement du dispositif de ponçage Active EP3493948B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL17754106T PL3493948T3 (pl) 2016-08-05 2017-08-02 Urządzenie szlifierskie i sposób eksploatowania urządzenia szlifierskiego

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016214568.1A DE102016214568A1 (de) 2016-08-05 2016-08-05 Bearbeitungsvorrichtung und Bearbeitungsverfahren
PCT/EP2017/069520 WO2018024769A2 (fr) 2016-08-05 2017-08-02 Système d'usinage et procédé d'usinage

Publications (2)

Publication Number Publication Date
EP3493948A2 true EP3493948A2 (fr) 2019-06-12
EP3493948B1 EP3493948B1 (fr) 2021-12-22

Family

ID=59649674

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17754106.7A Active EP3493948B1 (fr) 2016-08-05 2017-08-02 Dispositif de ponçage et procede de fonctionnement du dispositif de ponçage

Country Status (6)

Country Link
US (1) US11325219B2 (fr)
EP (1) EP3493948B1 (fr)
CN (1) CN109715341A (fr)
DE (1) DE102016214568A1 (fr)
PL (1) PL3493948T3 (fr)
WO (1) WO2018024769A2 (fr)

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IT201800000625A1 (it) * 2018-01-09 2019-07-09 Costa Levigatrici Spa Macchina levigatrice con nastro trasversale
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JP6852034B2 (ja) * 2018-10-15 2021-03-31 本田技研工業株式会社 研磨装置
CH716746A2 (de) * 2019-10-16 2021-04-30 Kuendig Ag Vorrichtung und Verfahren für den seitlich präzis definierten Einsatz von Schleifbändern bei Bandschleifmaschinen im Durchlauf.
CN112676992A (zh) * 2020-12-30 2021-04-20 青岛建诚伟业机械制造有限公司 一种升降式电磁压梁系统

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Also Published As

Publication number Publication date
WO2018024769A3 (fr) 2018-03-29
WO2018024769A2 (fr) 2018-02-08
US20190232455A1 (en) 2019-08-01
PL3493948T3 (pl) 2022-03-28
CN109715341A (zh) 2019-05-03
DE102016214568A1 (de) 2018-02-08
EP3493948B1 (fr) 2021-12-22
US11325219B2 (en) 2022-05-10

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