EP2210705B1 - Device for belt tensioning - Google Patents

Device for belt tensioning Download PDF

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Publication number
EP2210705B1
EP2210705B1 EP10000575.0A EP10000575A EP2210705B1 EP 2210705 B1 EP2210705 B1 EP 2210705B1 EP 10000575 A EP10000575 A EP 10000575A EP 2210705 B1 EP2210705 B1 EP 2210705B1
Authority
EP
European Patent Office
Prior art keywords
double
chamber
tensioning
cylinder
piston
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.)
Not-in-force
Application number
EP10000575.0A
Other languages
German (de)
French (fr)
Other versions
EP2210705A3 (en
EP2210705A2 (en
Inventor
Patrik Moser
Walter Geiger
Heinrich Schwerzmann
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.)
Steinemann Technology AG
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Steinemann Technology AG
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Filing date
Publication date
Application filed by Steinemann Technology AG filed Critical Steinemann Technology AG
Priority to PL10000575T priority Critical patent/PL2210705T3/en
Publication of EP2210705A2 publication Critical patent/EP2210705A2/en
Publication of EP2210705A3 publication Critical patent/EP2210705A3/en
Application granted granted Critical
Publication of EP2210705B1 publication Critical patent/EP2210705B1/en
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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 for machining surfaces of particular flat, planar components, for. B. of wood or wood materials, according to the preamble of claim 1 ( DE 296 00 447 U1 ).
  • Wide grinding machines for processing surfaces of particular flat, planar components made of wood or wood-based materials, metal plates, plates made of plastic or rubber or paper webs have established themselves as an independent genus of grinding machines. They are contained in a machine stand (as used eg in the WO 00/38882 A2 the applicant is disclosed) one or more grinding heads, each with a grinding belt which endlessly revolves around a grinding roller and a tensioning roller.
  • the at least one grinding head and its drive motor is attached via a cross member on the machine stand.
  • the drive motor is attached to one end of the cross member and at the opposite end a detachable connection for the grinding head is provided.
  • a belt sander in which a tensioning wheel is permanently pressurized and / or spring loaded to vorzusparlnen the sanding belt with a selectable contact pressure.
  • contact pressures adjustable to move a tension roller against the fixed rigid work roll.
  • a tensioning device below the tensioning roller has at least one air spring and a guide device guiding the displacement.
  • the belt tension is effected by means of an eccentric actuated by a hydraulic cylinder.
  • the invention has for its object to develop a wide-belt sanding machine for machining surfaces of particular flat, planar components, the one simple and reliable clamping of an abrasive belt allows.
  • the object is solved with the features of claim 1.
  • Starr synchronized double-piston cylinders at the ends / journals of the tensioning roller are here connected crosswise to achieve a parallel adjustment of the tensioning roller with respect to the grinding roller. This makes it possible to position narrower strips on one side than the width of the roll and to tension them evenly on the clamping cylinders despite one-sided counterpressure.
  • small spring-loaded compensating pistons can be installed in the cross connections. This maintains a parallel operation of the rollers in the process, but in the cocked position a soft behavior for optimum tension.
  • the drawing shows in the Fig. 1 and 2 a schematic diagram of the inventive device in two embodiments, wherein in the Fig. 2 unlike the execution in Fig. 1 the synchronizing cylinder is installed in the piston of the clamping cylinder to save height.
  • a generic and therefore not explicitly shown wide-belt sanding machine in Fig. 3 includes a grinding roller 20 and a tension roller 21 for tensioning a Schleitbandes 19, wherein the tension roller 21 is mounted in a conventional manner at the ends / bearing pin.
  • the bearings 22 can be acted upon by adjacent double-piston cylinders 23, 24 in order to achieve an adjustable tension of the sanding belt.
  • the double piston cylinders 23, 24 each have a front chamber 25 and a rear chamber 26 for a hydraulic medium, which are separated by a disc 29 from each other.
  • the chambers 25, 26 can communicate with each other via connecting lines 27, 28, which are laid crosswise.
  • the bearings 22 of the tension roller 21 are so rigidly synchronized and can be applied equally regardless of the size of the piston pressure, resulting in a uniform belt tension.

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

Description

Die Erfindung betrifft eine Breitbandschleifmaschine zum Bearbeiten von Oberflächen von insbesondere flächigen, ebenen Bauelementen, z. B. aus Holz bzw. Holzwerkstoffen, gemäß dem Oberbegriff des Patentanspruchs 1 ( DE 296 00 447 U1 ).The invention relates to a wide-belt sanding machine for machining surfaces of particular flat, planar components, for. B. of wood or wood materials, according to the preamble of claim 1 ( DE 296 00 447 U1 ).

Breitschleifmaschinen zum Bearbeiten von Oberflächen von insbesondere flächigen, ebenen Bauelementen aus Holz bzw. Holzwerkstoffen, Metallplatten, Platten aus Kunststoff oder Gummi oder auch Papierbahnen haben sich als eigenständige Gattung von Schleifmaschinen etabliert. Sie enthalten in einem Maschinenständer (wie er z. B. in der WO 00/38882 A2 der Anmelderin offenbart ist) einen oder mehrere Schleifköpfe mit jeweils einem Schleifband, welches endlos um eine Schleifwalze und eine Spannwalze umläuft. Der mindestens eine Schleifkopf und dessen Antriebsmotor ist über einen Querträger am Maschinenständer befestigt. Der Antriebsmotor ist an einem Ende des Querträgers befestigt und am gegenübeniegenden Ende ist eine lösbare Verbindung für den Schleifkopf vorgesehen.Wide grinding machines for processing surfaces of particular flat, planar components made of wood or wood-based materials, metal plates, plates made of plastic or rubber or paper webs have established themselves as an independent genus of grinding machines. They are contained in a machine stand (as used eg in the WO 00/38882 A2 the applicant is disclosed) one or more grinding heads, each with a grinding belt which endlessly revolves around a grinding roller and a tensioning roller. The at least one grinding head and its drive motor is attached via a cross member on the machine stand. The drive motor is attached to one end of the cross member and at the opposite end a detachable connection for the grinding head is provided.

In der DE-A-19841172 ist eine Bandschleifmaschine offenbart, bei der ein Spannrad permanent druck- und/oder federbeaufschlagt ist um das Schleifband mit einem wählbaren Anpressdruck vorzusparlnen. Es sollen verschiedene Anpressdrücke einstellbar sein um eine Spannwalze entgegen der feststehenden starren Arbeitswalze zu verfahren. Bei einer weiteren Bandsehleifmaschine gemäss EP-A-1629942 soll eine Bandspannung mit geringem Platzbedarf ermöglicht werden. Hierzu weist eine Spannvorrichtung unterhalb der Spannwalze mindestens eine Luftfeder und eine, die Verschiebung führende Führungseinrichtung auf. Bei einer Bandschleifmaschine gemäss US-A-4262455 erfolgt die Bandspannung mittels eines, durch einen Hydraulikzylinders betätigten Excenters.In the DE-A-19841172 a belt sander is disclosed in which a tensioning wheel is permanently pressurized and / or spring loaded to vorzusparlnen the sanding belt with a selectable contact pressure. There are different contact pressures adjustable to move a tension roller against the fixed rigid work roll. In a further belt sander according to EP-A-1629942 should a tape tension with a small footprint be enabled. For this purpose, a tensioning device below the tensioning roller has at least one air spring and a guide device guiding the displacement. In a belt grinder according to US-A-4262455 the belt tension is effected by means of an eccentric actuated by a hydraulic cylinder.

Der Erfindung liegt die Aufgabe zugrunde, eine Breitbandschleifmaschine zum Bearbeiten von Oberflächen von insbesondere flächigen, ebenen Bauelementen zu entwickeln, die ein einfaches und funktionssicheres Spannen eines Schleifbandes ermöglicht. Die Aufgabe ist mit den Merkmalen des Patentanspruchs 1 gelöst. Starr synchronisierte Doppelkolbenzylinder an den Enden/Lagerzapfen der Spannwalze sind hierbei über Kreuz verbunden um eine parallele Verstellung der Spannwalze in Bezug auf die Schleifwalze zu erreichen. Dies ermöglicht, schmalere Bänder als die Walzenbreite einseitig zu positionieren und trotz einseitigem Gegendruck auf die Spannzylinder gleichmässig zu spannen. Um bei ungenauen, konisch gefertigten Schleifbändern trotzdem eine gleichmässige Spannung zu erreichen, können in den Kreuzverbindungen kleine federbeaufschlagte Ausgleichskolben eingebaut werden. Damit behält man ein Parallellauf der Walzen beim Verfahren, jedoch in der gespannten Position ein weiches Verhalten für eine optimale Spannung.The invention has for its object to develop a wide-belt sanding machine for machining surfaces of particular flat, planar components, the one simple and reliable clamping of an abrasive belt allows. The object is solved with the features of claim 1. Starr synchronized double-piston cylinders at the ends / journals of the tensioning roller are here connected crosswise to achieve a parallel adjustment of the tensioning roller with respect to the grinding roller. This makes it possible to position narrower strips on one side than the width of the roll and to tension them evenly on the clamping cylinders despite one-sided counterpressure. In order nevertheless to achieve a uniform tension in inaccurate, conically produced abrasive belts, small spring-loaded compensating pistons can be installed in the cross connections. This maintains a parallel operation of the rollers in the process, but in the cocked position a soft behavior for optimum tension.

Die Erfindung wird nachfolgend in einem Ausführungsbeispiel anhand einer Zeichnung mit drei Figuren näher erläutert. Die Zeichnung zeigt in den Fig. 1 und 2 eine Prinzipdarstellung der erfindungsgemässen Einrichtung in zwei Ausführungsformen, wobei bei der Fig. 2 im Gegensatz zur Ausführung in Fig. 1 der Gleichlaufzylinder in den Kolben des Spannzylinders eingebaut wird, um Bauhöhe einzusparen.The invention will be explained in more detail in an embodiment with reference to a drawing with three figures. The drawing shows in the Fig. 1 and 2 a schematic diagram of the inventive device in two embodiments, wherein in the Fig. 2 unlike the execution in Fig. 1 the synchronizing cylinder is installed in the piston of the clamping cylinder to save height.

Eine gattungsgemässe und daher nicht explizit dargestellte Breitbandschleifmaschine in Fig. 3 enthält eine Schleifwalze 20 und eine Spannwalze 21 zur Spannung eines Schleitbandes 19, wobei die Spannwalze 21 in üblicher Weise an den Enden/Lagerzapfen gelagert ist. Die Lager 22 sind durch anliegende Doppelkolbenzylinder 23, 24 beaufschlagbar um eine einstellbare Spannung des Schleifbandes zu erreichen. Die Doppelkolbenzylinder 23, 24 weisen jeweils eine vordere Kammer 25 und eine hintere Kammer 26 für ein Hydraulikmittel auf, die durch eine Scheibe 29 voneinander getrennt sind. Die Kammern 25, 26 können über Verbindungsleitungen 27, 28, die kreuzweise verlegt sind, miteinander kommunizieren.A generic and therefore not explicitly shown wide-belt sanding machine in Fig. 3 includes a grinding roller 20 and a tension roller 21 for tensioning a Schleitbandes 19, wherein the tension roller 21 is mounted in a conventional manner at the ends / bearing pin. The bearings 22 can be acted upon by adjacent double-piston cylinders 23, 24 in order to achieve an adjustable tension of the sanding belt. The double piston cylinders 23, 24 each have a front chamber 25 and a rear chamber 26 for a hydraulic medium, which are separated by a disc 29 from each other. The chambers 25, 26 can communicate with each other via connecting lines 27, 28, which are laid crosswise.

Wird nun z. B. die Spannwalze ausgefahren, wird über die Leitung 32 ein Druck in der unteren Kammer 33 im Zylinder 23 und 24 erzeugt, wobei eine Kraft auf die gemeinsame Kolbenstange 35 erzeugt wird, die für den Spanndruck verantwortlich ist. Dabei wird die vordere Kammer 25 des Doppelkolbenzylinders 23 beaufschlagt, die wiederum über die Verbindungsleitung 28 zugleich die hintere Kammer 26 des Doppelkolbenzylinders 24 beaufschlagt. In gleicher Weise verbindet die Verbindungsleitung 27 die hintere Kammer 26 des Doppelkolbenzylinders 23 mit der vorderen Kammer 25 des Doppelkolbenzylinders 24. Möchte nun z. B. der Spannzylinder 23 aus Gründen von ungleichen Reibverhältnissen oder ungleichem Gegendruck früher oder schneller ausfahren, wird in der Kammer 25 des Zylinders 23 ein grösserer Druck als in der Kammer 25 des Zylinders 24 aufgebaut. Dieser Mehrdruck wird an die Kammer 26 des Zylinders 24 weitergegeben und somit der Kolbenstange zum Ausfahren geholfen. Der leichtergängige oder mit weniger Gegenkraft belastete Spannzylinder gibt seine Kraft also dem anderen Zylinder weiter.Will now z. B. extended the tension roller, a pressure in the lower chamber 33 in the cylinder 23 and 24 is generated via the line 32, wherein a force is generated on the common piston rod 35, which is responsible for the clamping pressure. In this case, the front chamber 25 of the double-piston cylinder 23 is acted upon, which in turn acts on the connecting line 28, the rear chamber 26 of the double-piston cylinder 24 at the same time. In the same way connects the connecting line 27, the rear Chamber 26 of the double-piston cylinder 23 with the front chamber 25 of the double-piston cylinder 24. Would like now z. B. the clamping cylinder 23 for reasons of unequal friction conditions or uneven back pressure extend earlier or faster, a larger pressure than in the chamber 25 of the cylinder 24 is constructed in the chamber 25 of the cylinder 23. This increased pressure is passed to the chamber 26 of the cylinder 24 and thus helped the piston rod to extend. The smooth-running or with less counterforce loaded clamping cylinder gives its power so the other cylinder on.

Die Lager 22 der Spannwalze 21 sind so starr synchronisiert und können unabhängig von der Grösse des Kolbendruckes gleich beaufschlagt werden, was eine gleichmässige Bandspannung ergibt.The bearings 22 of the tension roller 21 are so rigidly synchronized and can be applied equally regardless of the size of the piston pressure, resulting in a uniform belt tension.

Beim Rückfahren werden die Gleichlaufzylinder 30 gespült um Lufteinschlüsse zu vermeiden.When reversing the synchronizing cylinder 30 are flushed to avoid trapped air.

Bezugszeichenreference numeral

1919
Schleifbandsanding belt
2020
Schleifwalzegrinding roll
2121
Spannwalzetension roller
2222
Lagercamp
2323
DoppelkolbenzylinderDouble piston cylinders
2424
DoppelkolbenzylinderDouble piston cylinders
2525
Kammerchamber
2626
Kammerchamber
2727
Verbindungsleitungconnecting line
2828
Verbindungsleitungconnecting line
2929
Scheibedisc
3030
GleichlaufzylinderSynchronizing cylinder
3131
Zuleitung SpannzylinderSupply line clamping cylinder
3232
Zuleitung SpannzylinderSupply line clamping cylinder
3333
Kammerchamber
3434
Kammerchamber
3535
Kolbenstangepiston rod

Claims (3)

  1. A wide abrasive belt grinding machine for machining surfaces of in particular flat, level components, e.g. made of wood or wood materials, with a tension roller (21) and a grinding roller (20) around which an endlessly revolving abrasive belt (19) wraps, the tensioning roller (21) being arranged adjustably for the purpose of tensioning or relaxing the tension of the abrasive belt (19), and with a means for tensioning the belt, characterised in that the ends or bearings (22) respectively of the tension roller (21) are allocated one double-piston cylinder (23, 24) in each case, the double-piston cylinders (23, 24) each having a lower chamber (33), with a tensioning cylinder feed line (32) for producing a pressure being provided in the lower chambers (33), each having an upper chamber (34), with a tensioning cylinder feed line (31) to the upper chambers (34) being present, each having a front chamber (25) and a rear chamber (26),
    the front chamber (25) of the one double-piston cylinder (23) being connected via a connecting line (28) to the rear chamber (26) of the other double-piston cylinder (24), and the rear chamber (26) of the one double-piston cylinder (23) being connected via a connecting line (27) to the front chamber (25) of the other double-piston cylinder (24).
  2. A wide abrasive belt grinding machine according to Claim 1, characterised in that the double-piston cylinders (23, 24) are rigidly synchronised.
  3. A wide abrasive belt grinding machine according to Claim 1 or 2, characterised in that compensating pistons for compensating for belt errors are provided in the connecting lines (27, 28).
EP10000575.0A 2009-01-22 2010-01-21 Device for belt tensioning Not-in-force EP2210705B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL10000575T PL2210705T3 (en) 2009-01-22 2010-01-21 Device for belt tensioning

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH00095/09A CH700303A2 (en) 2009-01-22 2009-01-22 Device for belt tension.

Publications (3)

Publication Number Publication Date
EP2210705A2 EP2210705A2 (en) 2010-07-28
EP2210705A3 EP2210705A3 (en) 2013-04-03
EP2210705B1 true EP2210705B1 (en) 2014-12-17

Family

ID=42115398

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10000575.0A Not-in-force EP2210705B1 (en) 2009-01-22 2010-01-21 Device for belt tensioning

Country Status (3)

Country Link
EP (1) EP2210705B1 (en)
CH (1) CH700303A2 (en)
PL (1) PL2210705T3 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109732464A (en) * 2019-03-08 2019-05-10 苏州亨允晟机电科技有限公司 A kind of polishing mechanism being exclusively used in building stone and/or plate
CN111390719A (en) * 2020-05-12 2020-07-10 温州光挺电子科技有限公司 Electronic tags card recovery plant

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102922396A (en) * 2012-11-29 2013-02-13 无锡富岛精工有限公司 Telescopic bracket
CN111975572B (en) * 2020-07-30 2022-04-22 西安理工大学 Abrasive belt grinding mechanism with adjustable contact rigidity
IT202100008375A1 (en) * 2021-04-02 2022-10-02 Biesse Spa MACHINE FOR THE SURFACE FINISHING OF WOODEN, METAL, PLASTIC OR SIMILAR PANELS

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2443489A1 (en) * 1974-09-11 1976-04-01 Baehre & Greten Wide band wood plank polishing machine - has automatic retraction at power failure
US4262455A (en) 1978-08-24 1981-04-21 Contraves Goerz Corporation Head positioning for a belt grinder
DE3823835A1 (en) * 1988-07-14 1990-01-18 Fraunhofer Ges Forschung Machining apparatus
DE29600447U1 (en) * 1996-01-12 1996-02-29 Paul Ernst Maschinenfabrik GmbH, 74927 Eschelbronn Wide belt sander
DE19841172A1 (en) 1998-09-09 2000-03-23 Mahalek Franz Helmut Belt grinding machine for grinding workpiece surfaces, with roller element able to be moved and/or pressurized
ATE238133T1 (en) 1998-12-24 2003-05-15 Steinemann Technology Ag WIDE GRINDING MACHINE
DE102004041364A1 (en) 2004-08-25 2006-03-02 Heesemann, Jürgen, Dipl.-Ing. belt sander

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109732464A (en) * 2019-03-08 2019-05-10 苏州亨允晟机电科技有限公司 A kind of polishing mechanism being exclusively used in building stone and/or plate
CN111390719A (en) * 2020-05-12 2020-07-10 温州光挺电子科技有限公司 Electronic tags card recovery plant
CN111390719B (en) * 2020-05-12 2020-12-25 广西电网有限责任公司贺州供电局 Electronic tags card recovery plant

Also Published As

Publication number Publication date
PL2210705T3 (en) 2015-04-30
EP2210705A3 (en) 2013-04-03
CH700303A2 (en) 2010-07-30
EP2210705A2 (en) 2010-07-28

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