EP2995421A1 - Affuteuse a bande large dote d'un reglage du rouleau tendeur pour produire un modele d'affutage predefini et procede associe - Google Patents

Affuteuse a bande large dote d'un reglage du rouleau tendeur pour produire un modele d'affutage predefini et procede associe Download PDF

Info

Publication number: EP2995421A1
Authority: EP; European Patent Office
Prior art keywords: belt; grinding; controller; signal; wide
Prior art date: 2014-09-12
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

EP15185043.5A

Other languages

German (de)

English (en)

Other versions

EP2995421B1 (fr

Inventor

Georg Weber

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.)

Individual

Original Assignee

Individual

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.)

2014-09-12

Filing date

2015-09-14

Publication date

2016-03-16

2015-09-14 Application filed by Individual filed Critical Individual

2016-03-16 Publication of EP2995421A1 publication Critical patent/EP2995421A1/fr

2022-01-19 Application granted granted Critical

2022-01-19 Publication of EP2995421B1 publication Critical patent/EP2995421B1/fr

Status Not-in-force legal-status Critical Current

2035-09-14 Anticipated expiration legal-status Critical

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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
- B24B21/18—Accessories
- B24B21/20—Accessories for controlling or adjusting the tracking or the tension of the grinding belt
- 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

Definitions

the invention relates to a wide-belt sanding machine with a sanding belt, which is guided over a grinding roller and a position-controlled tensioning roller. Furthermore, the invention relates to an associated method.
the sanding belt is stretched over at least two rollers.
one of the rollers serves as a grinding roller and the other roller as a tensioning roller.
the abrasive belt is designed as an endless belt. With the length and width ratios used, it is difficult to center the belt over spherical rollers without additional control. To make matters worse still band tolerance and elongation are added.
a control is described in which the position of the edge of the sanding belt is detected with a light barrier.
a pneumatic adjusting member is used to control the abrasive belt. Due to the control of the adjusting member is continuously operated, which is a continuous oscillation of the grinding belt with a certain hysteresis Episode has. The resulting traces of oscillation significantly affect the grinding result.
the DE 20 2012 100 928 U1 Hans Weber Maschinenfabrik describes a wide-belt sanding machine with a position-controlled tensioning roller. By specifying a constant setpoint, the random oscillation of the grinding belt is effectively prevented.
DE 10 2007 012 580 A1 describes a method for guiding the tape of a belt grinding machine, in which the lateral position of an abrasive belt is detected by means of an analog edge sensor.
the signals from the analog edge sensor are fed to an electropneumatic governor, which regulates the pressure of a pneumatic oscillation cylinder, resulting in a nearly stationary abrasive belt.
the signal of the analog edge sensor can be acted upon via a control unit, so that a tensioning roller pivots about a pivot point.
DE 11 38 658 A describes a device for regulating and controlling the running of abrasive belts on belt grinders.
a motor drive controls a pivotable tape roll to perform continuous, uniform forced oscillations about a swing axis.
the frequency and amplitude of the vibrations is adjustable.
the abrasive belt is passed over a sanding roller and a tension roller.
the tensioning roller is adjustable in its position by means of an actuator in such a way that the grinding belt occupies a predetermined position on the grinding roller.
a position detector e.g. a photocell detected.
This light barrier comprises a beam source and a detector. With the light barrier, the edge of the sanding belt is captured in a silhouette process.
the detector generates a continuous analog actual signal, which is dependent on the position of the grinding belt with respect to the light barrier and thus also with respect to the position of the grinding belt on the grinding roller.
the analog actual signal is fed to a controller which controls the actuator continuously so that by changing the position of the tensioning roller, the grinding belt on the grinding roller maintains a predetermined position.
a controller generates an oscillating signal, which is supplied as a reference variable to the controller.
This controller controls the actuator so that the abrasive belt changes its lateral position with respect to the light barrier according to the time course of the reference variable. Accordingly, in conjunction with the forward movement of the workpiece under the abrasive roller, a grinding pattern defined by the guide size results.
the controller may generate as oscillating signal, for example, a sinusoidal signal, a triangular signal, a trapezoidal signal or an overlay of these signals. Accordingly, as a grinding pattern along the workpiece surface, a sinusoidal pattern, a triangular pattern, a trapezoidal pattern or an overlay of these patterns result. It should be noted that in the steady state of the control loop, the disturbances, e.g. a random emigration of the movement of the grinding belt, are corrected and no longer occur such disturbances in the grinding pattern.
the oscillating signal generated by the controller may include time periods with constant signal level in its time course. These are expressed in the grinding pattern as path sections with a constant abrasive structure.
the controller comprises a function generator for generating periodic and non-periodic signals. In this way, a variety of waveforms can be provided for the command variable, resulting in a wide range of patterns.
the controller is designed as a programmable logic controller (PLC).
PLC programmable logic controller
an optical reflex sensor in addition to the above-mentioned forked light barrier, an optical reflex sensor, a mechanical contactor, a capacitive or inductive sensor, an ultrasonic sensor or a compressed air sensor, e.g. according to the nozzle-flapper principle works to be used. It is essential that the position detector used in each case detects the web edge continuously and continuously images its position in a signal, preferably analog.
the actuator is pneumatic and comprises at least one bellows cylinder, which operates against a restoring element.
These bellows cylinders have no slip-stick effect, whereby the control process is more continuous.
a pneumatic muscle cylinder with similar functional behavior can be used.
the axis of rotation of the tensioning roller is adjustable in at least one plane. It is particularly advantageous if this plane is selected parallel to the material surface to be ground. As a result, the actuator can be constructed particularly simple.
the controller is a proportional controller.
This proportional controller is particularly simple in construction and can be easily implemented, e.g. in the form of a solenoid valve which adjusts the pneumatic pressure supplied to the actuator.
control loop additionally has an integral and / or differential behavior.
This integral behavior of the control loop improves the control to minimize the permanent setpoint value deviation typical of a proportional controller.
a differential behavior increases the control speed of the control loop.
the tensioning roller is centrally supported by means of a tower shaft and can be rotated about the longitudinal axis of the tower shaft.
a gimbal is achieved when the tension roller is mounted so that it can oscillate about a third axis which is aligned perpendicular to the longitudinal axis of the tower shaft.
the tension roller can be particularly easily aligned so that a grinding belt with different circumferential lengths touches the tension roller at each point.
the sanding roller is driven by motor means. This improves the control in that the mass of the drive does not have to be moved with the tension roller from the actuator. As a result, the actuator can be constructed simpler.
FIG. 1 shows a schematic structure of a control loop 10 for position control of an abrasive belt 12.
the sanding belt 12 is guided over a tension roller 14 and a grinding roller 16.
the sanding roller 16 presses the sanding belt 12 onto a workpiece 18 to be sanded.
the sanding belt 12 is an endless sanding belt with a width of up to about 3 meters. Due to the manufacturing process, such an abrasive belt 12 is not quite uniform, ie the circumference at one edge of the belt usually differs from the circumference at the other edge of the belt. Therefore, in the grinding operation, the grinding belt 12 tends to emigrate along a rotation axis 20 of the grinding roller 16 in the predetermined direction in addition to the rotation direction indicated by the arrow P1. The lateral movement in the direction of the axis of rotation 20 is a disturbance. With the help of the control loop 10, the position of the grinding belt 12 is monitored on the grinding roller 16 and counteracts the disturbing movement actively.
a detector in the light barrier 22 generates a continuous analog actual signal.
the analog actual signal is a DC signal, in this embodiment, a voltage between 0 volts and +10 volts.
a signal of 0 volts corresponds to a position of the belt edge of the sanding belt 12 at one end of the detection range of the light barrier 22, while a signal of +10 volts means a position of the belt edge of the sanding belt 12 at the other detection limit of the light barrier 22.
This analog actual signal is according to FIG. 1 a controller 24 which provides the pneumatic pressure for a pneumatic actuator. Furthermore, the controller 24 may be supplied in a variant of a generated by a desired value encoder 26 analog target signal.
the desired signal corresponds to a desired position of the sanding belt 12 on the sanding roller 16. At the desired value encoder 26, the desired position of the sanding belt 12 is adjustable.
the input of the controller 24 is connected via a switching device 29 to the output of a controller S, which supplies as command variable w optionally oscillating signals to the controller 24.
a sinusoidal signal, a trapezoidal signal and a triangular signal for the controller S are shown as signals.
the controller 24 comprises a summing element 28 and a proportional controller 30.
the summing element 28 is supplied with desired signal and actual signal.
the formed deviation between Target signal and actual signal is supplied to the proportional controller 30, which generates a corresponding control signal.
This exemplary pneumatic signal may process the pneumatic actuator 32.
the actuator 32 which includes, for example, a bellows cylinder, changes the position of a rotation axis 34 of the tension roller 14 to the effect that the grinding belt 12 complies with the target position predetermined by the desired signal on the grinding roller 16.
the change in position of the rotation axis 34 will later in the Figures 3 and 4 described.
FIG. 2 shows as an example of a position detector, the light barrier 22, which is a fork light barrier in this embodiment, in which the abrasive belt 12 is immersed with its side edge.
the fork light barrier 22 comprises a large-area light-emitting diode as a beam source 36 and a phototransistor 38 optimized for an emission wavelength of the light-emitting diode 36.
light-emitting diode 36 and detector 38 are optimally aligned with one another on a U-shaped carrier 39.
the edge of the sanding belt 12 is guided in such a way that, in its desired position on the sanding roller 16, it partially covers a light beam 40 emitted by the light-emitting diode 36 and thus partially shades the detector 38.
the electrical signal generated by the detector 38 is proportional to the amount of light arriving at the detector 38, which in turn depends on the position of the band edge of the grinding belt 12. If the sanding belt 12 covers the entire light beam 40, then the detector 38 will output a signal of 0 volt. If the light beam 40 at the detector 38 is not shadowed by the abrasive belt 12 at all, then the detector 38 will output a signal of 10 volts. In a partial shading of the detector 38th the voltage signal of the detector 38 is proportional to the shading and thus dependent on the position of the grinding belt 12.
FIG. 3 shows a position of the tension roller 14 and the grinding belt 12 in an adjustment of the position of the tension roller 14 by the actuator 32.
This actuator 32 has the position of the axis of rotation 34 of the tension roller 14 changed so that it occupies the position shown in dashed lines 14 '.
the tension roller 14 is mounted centrally by a tower shaft 46 and can be pivoted about an axis of rotation 15.
the actuator 32 engages the end 44 of the tension roller 14 and pivots this end 44 about the axis of rotation 15 so as to provide the positions shown at 44 'and 44 "by the reference numerals 42, 42' and 42"
Tensioning roller 14 denotes.
the tower shaft 46 supports the tension roller 14 in the center and can pivot about the rotation axis 15. If the tension roller 14 is gimbal connected to the tower roller 46 (gimbal suspension), it can also be pivoted in a third axis perpendicular to the axis of rotation 15, wherein the paper plane of the FIG. 4 leaves.
the tensioning roller 14 can be moved in the direction of the longitudinal axis of the tower shaft 46 in order to be able to tension sanding belts 12 of different lengths and to enable the replacement of sanding belts.
the tensioning roller 14 is aligned by a movement about the third axis in such a way that the grinding belt 12 touches the tensioning roller 14 at each point of the tensioning roller 14.
the control circuit 10 (FIG. FIG. 1 ) controlled by the controller S, which is advantageously designed as a programmable logic controller (PLC).
the signal generated by this control S is supplied as a reference variable w the controller 24, which controls the actuator 32 so that the grinding belt 12 changes its lateral position according to the time course of the reference variable w.
a grinding pattern is generated on its surface, which follows in the steady state of the control loop 10 in close approximation to the time course of the reference variable w.
By the action of the control loop 10 and random disturbances are regulated, which can occur, for example, due to the unevenness of the grinding belt 12.
the controller S comprises a preferably programmable function generator, with the aid of which periodic and non-periodic signals can be generated.
the signal generated by the controller in its time course may contain time segments with constant signal level.
the control circuit 10 causes a constant grinding pattern to be generated along a path on the surface of the workpiece. It is also possible to superimpose different sinusoidal signals, which lead to different time profiles of the reference variable w in accordance with the composition of Fourier components, thereby providing the user with a broad spectrum of grinding patterns for surfaces of workpieces.
Another development provides that a plurality of grinding patterns and the associated signal curves for the oscillating signal are stored in a memory. A user can then select one of these different grinding patterns.
the controller S then supplies the associated signal profile to the controller 24 as a reference variable w and the wideband grinding machine thus controlled generates the grinding pattern on the surface of the workpiece.

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Engineering & Computer Science (AREA)
Mechanical Engineering (AREA)
Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

EP15185043.5A 2014-09-12 2015-09-14 Affuteuse a bande large dotee d'un reglage du rouleau tendeur pour produire un modele d'affutage predefini et procede associe Not-in-force EP2995421B1 (fr)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
DE202014104310.1U DE202014104310U1 (de)	2014-09-12	2014-09-12	Breitbandschleifmaschine mit Regelung der Spannwalze zum Erzeugen eines vorbestimmten Schleifmusters

Publications (2)

Publication Number	Publication Date
EP2995421A1 true EP2995421A1 (fr)	2016-03-16
EP2995421B1 EP2995421B1 (fr)	2022-01-19

Family

ID=54145639

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP15185043.5A Not-in-force EP2995421B1 (fr)	2014-09-12	2015-09-14	Affuteuse a bande large dotee d'un reglage du rouleau tendeur pour produire un modele d'affutage predefini et procede associe

Country Status (2)

Country	Link
EP (1)	EP2995421B1 (fr)
DE (1)	DE202014104310U1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE102018214048A1 (de) *	2018-08-21	2020-02-27	Langhammer Gmbh	Absetzband für eine Palettiervorrichtung
US20200070305A1 (en) *	2018-08-29	2020-03-05	Vsm Vereinigte Schmirgel- Und Maschinen-Fabriken Ag	Endless abrasive belt for a sanding machine
CN112847062A (zh) *	2021-01-07	2021-05-28	福建居怡竹木业有限公司	一种仿古柔砂机连线机构
CN118068774A (zh) *	2024-02-20	2024-05-24	苏州铼钠克信息技术有限公司	振荡磨削路径的规划方法、装置、电子设备和存储介质
IT202300009645A1 (it) *	2023-05-12	2024-11-12	Scm Group Spa	Macchina levigatrice per la lavorazione di pezzi

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE102017206179A1 (de) *	2017-04-11	2018-10-11	Homag Bohrsysteme Gmbh	Schleifvorrichtung
DE102018114447A1 (de) *	2018-06-15	2019-12-19	Shl Ag	Vorrichtung und Verfahren zum Schleifen und/oder Polieren von Werkstücken
EP3599050A1 (fr)	2018-07-27	2020-01-29	Steinemann Technology AG	Dispositif de meulage pour une meuleuse
DE102019105098A1 (de) *	2018-07-27	2020-01-30	Steinemann Technology Ag	Schleifanordnung für eine Schleifmaschine
CN114083403B (zh) *	2022-01-19	2022-04-29	杭州金鱼家电有限公司	一种洗衣机盖板砂带打磨工作台

Citations (6)

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Publication number	Priority date	Publication date	Assignee	Title
DE1138658B (de)	1959-02-16	1962-10-25	Ernst Carstens Maschinenfabrik	Einrichtung zum Einregulieren und Steuern des Laufes von Schleifbaendern an Bandschleifmaschinen
DE3331429A1 (de)	1983-08-31	1985-03-21	Gebr. Bütfering Maschinenfabrik, 4720 Beckum	Verfahren und vorrichtung zur steuerung der lage eines objektes
US6126512A (en) *	1998-07-10	2000-10-03	Aplex Inc.	Robust belt tracking and control system for hostile environment
US6899594B1 (en) *	2004-03-30	2005-05-31	Lam Research Corporation	Relative lateral motion in linear CMP
DE102007012580A1 (de)	2007-03-13	2008-09-18	Steinemann Technology Ag	Verfahren zur Bandführung einer Bandschleifmaschine
DE202012100928U1 (de)	2012-03-15	2013-05-27	Hans Weber Maschinenfabrik Gmbh	Breitbandschleifmaschine mit lagegeregelter Spannwalze

2014
- 2014-09-12 DE DE202014104310.1U patent/DE202014104310U1/de not_active Expired - Lifetime
2015
- 2015-09-14 EP EP15185043.5A patent/EP2995421B1/fr not_active Not-in-force

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE1138658B (de)	1959-02-16	1962-10-25	Ernst Carstens Maschinenfabrik	Einrichtung zum Einregulieren und Steuern des Laufes von Schleifbaendern an Bandschleifmaschinen
DE3331429A1 (de)	1983-08-31	1985-03-21	Gebr. Bütfering Maschinenfabrik, 4720 Beckum	Verfahren und vorrichtung zur steuerung der lage eines objektes
US6126512A (en) *	1998-07-10	2000-10-03	Aplex Inc.	Robust belt tracking and control system for hostile environment
US6899594B1 (en) *	2004-03-30	2005-05-31	Lam Research Corporation	Relative lateral motion in linear CMP
DE102007012580A1 (de)	2007-03-13	2008-09-18	Steinemann Technology Ag	Verfahren zur Bandführung einer Bandschleifmaschine
DE202012100928U1 (de)	2012-03-15	2013-05-27	Hans Weber Maschinenfabrik Gmbh	Breitbandschleifmaschine mit lagegeregelter Spannwalze

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE102018214048A1 (de) *	2018-08-21	2020-02-27	Langhammer Gmbh	Absetzband für eine Palettiervorrichtung
WO2020038829A1 (fr)	2018-08-21	2020-02-27	Langhammer Gmbh	Bande de dépôt destinée à un dispositif de palettisation
DE102018214048B4 (de) *	2018-08-21	2020-11-26	Körber Supply Chain Automation Eisenberg GmbH	Absetzband für eine Palettiervorrichtung
US11511941B2 (en)	2018-08-21	2022-11-29	Koerber Supply Chain Automation Eisenberg Gmbh	Discharge belt for a palletising device
US20200070305A1 (en) *	2018-08-29	2020-03-05	Vsm Vereinigte Schmirgel- Und Maschinen-Fabriken Ag	Endless abrasive belt for a sanding machine
US11529713B2 (en) *	2018-08-29	2022-12-20	Vsm Vereinigte Schmirgel- Und Maschinen-Fabriken Ag	Endless abrasive belt for a sanding machine
CN112847062A (zh) *	2021-01-07	2021-05-28	福建居怡竹木业有限公司	一种仿古柔砂机连线机构
IT202300009645A1 (it) *	2023-05-12	2024-11-12	Scm Group Spa	Macchina levigatrice per la lavorazione di pezzi
EP4461465A1 (fr) *	2023-05-12	2024-11-13	SCM Group S.p.A.	Meuleuse
CN118068774A (zh) *	2024-02-20	2024-05-24	苏州铼钠克信息技术有限公司	振荡磨削路径的规划方法、装置、电子设备和存储介质

Also Published As

Publication number	Publication date
EP2995421B1 (fr)	2022-01-19
DE202014104310U1 (de)	2015-12-16

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