EP2210705B1 - Einrichtung zur Bandspannung - Google Patents
Einrichtung zur Bandspannung Download PDFInfo
- 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
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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.
Landscapes
- 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 ). - 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 - 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 gemässEP-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 gemässUS-A-4262455 erfolgt die Bandspannung mittels eines, durch einen Hydraulikzylinders betätigten Excenters. - 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.
- Die Erfindung wird nachfolgend in einem Ausführungsbeispiel anhand einer Zeichnung mit drei Figuren näher erläutert. Die Zeichnung zeigt in den
Fig. 1 und2 eine Prinzipdarstellung der erfindungsgemässen Einrichtung in zwei Ausführungsformen, wobei bei derFig. 2 im Gegensatz zur Ausführung inFig. 1 der Gleichlaufzylinder in den Kolben des Spannzylinders eingebaut wird, um Bauhöhe einzusparen. - 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. - 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.
- 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.
- Beim Rückfahren werden die Gleichlaufzylinder 30 gespült um Lufteinschlüsse zu vermeiden.
-
- 19
- Schleifband
- 20
- Schleifwalze
- 21
- Spannwalze
- 22
- Lager
- 23
- Doppelkolbenzylinder
- 24
- Doppelkolbenzylinder
- 25
- Kammer
- 26
- Kammer
- 27
- Verbindungsleitung
- 28
- Verbindungsleitung
- 29
- Scheibe
- 30
- Gleichlaufzylinder
- 31
- Zuleitung Spannzylinder
- 32
- Zuleitung Spannzylinder
- 33
- Kammer
- 34
- Kammer
- 35
- Kolbenstange
Claims (3)
- Breitbandschloifmaschine zum Bearbeiten von Oberflächen von insbesondere flächigen, ebenen Bauelementen, z.B. aus Holz bzw. Holzwerkstoffen mit einer Spannwalze (21) und einer Schleifwalze (20), die von einem endlos umlaufenden Schleifband (19) umschlungen sind, wobei die Spannwalze (21) zwecks Spannung oder Entspannung des Schleifbandes (19) verstellbar angeordnet ist, und mit einer Einrichtung zur Bandspannung,
dadurch gekennzeichnet, dass den Enden respektive Lager (22) der Spannwalze (21) je ein Doppelkolbenzylinder (23, 24) zugeordnet ist, wobei die Doppelkolbenzylinder (23, 24) je eine untere Kammer (33) aufweisen, wobei eine Spannzylinderzuleitung (32) zur Erzeugung eines Drucks in den unteren Kammern (33) vorgesehen ist, je eine obere Kammer (34) aufweisen, wobei eine Spannzylinderzuleitung (31) zu den oberen Kammern (34) vorhanden ist je eine vordere Kammer (25) und je eine hintere Kammer (26) aufweisen,
wobei die vordere Kammer (25) des einen Doppelkolbenzylinders (23) über eine Verbindungsleitung (28) mit der hinteren Kammer (26) des anderen Doppelkolbenzylinders (24) verbunden ist, und die hintere Kammer (26) des einen Doppelkolbenzylinders (23) Über eine Verbindungsleitung (27) mit der vorderen Kammer (25) des anderen Doppelkolbenzylinders (24) verbunden ist. - Breitbandschleifmaschine nach Anspruch 1, dadurch gekennzeichnet, dass die Doppelkolbenzylinder (23, 24) starr synchronisiert sind.
- Breitbandschleifmaschine nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass in den Verbindungsleitungen (27, 28) Ausgleichskolben zum Ausgleich von Bandfehlern vorgesehen sind.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL10000575T PL2210705T3 (pl) | 2009-01-22 | 2010-01-21 | Urządzenie do napinania pasa |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH00095/09A CH700303A2 (de) | 2009-01-22 | 2009-01-22 | Einrichtung zur Bandspannung. |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2210705A2 EP2210705A2 (de) | 2010-07-28 |
EP2210705A3 EP2210705A3 (de) | 2013-04-03 |
EP2210705B1 true EP2210705B1 (de) | 2014-12-17 |
Family
ID=42115398
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10000575.0A Not-in-force EP2210705B1 (de) | 2009-01-22 | 2010-01-21 | Einrichtung zur Bandspannung |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2210705B1 (de) |
CH (1) | CH700303A2 (de) |
PL (1) | PL2210705T3 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109732464A (zh) * | 2019-03-08 | 2019-05-10 | 苏州亨允晟机电科技有限公司 | 一种专用于建筑石材和/或板材的抛光机构 |
CN111390719A (zh) * | 2020-05-12 | 2020-07-10 | 温州光挺电子科技有限公司 | 一种电子标签卡回收设备 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102922396A (zh) * | 2012-11-29 | 2013-02-13 | 无锡富岛精工有限公司 | 可伸缩支架 |
CN111975572B (zh) * | 2020-07-30 | 2022-04-22 | 西安理工大学 | 一种可调接触刚度的砂带磨削机构 |
IT202100008375A1 (it) * | 2021-04-02 | 2022-10-02 | Biesse Spa | Macchina per la finitura superficiale di pannelli di legno, metallo, plastica o simili |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2443489A1 (de) * | 1974-09-11 | 1976-04-01 | Baehre & Greten | Breitbandschleifmaschine fuer platten, insbesondere holzplatten |
US4262455A (en) | 1978-08-24 | 1981-04-21 | Contraves Goerz Corporation | Head positioning for a belt grinder |
DE3823835A1 (de) * | 1988-07-14 | 1990-01-18 | Fraunhofer Ges Forschung | Bearbeitungsvorrichtung |
DE29600447U1 (de) * | 1996-01-12 | 1996-02-29 | Paul Ernst Maschinenfabrik GmbH, 74927 Eschelbronn | Breitbandschleifmaschine |
DE19841172A1 (de) | 1998-09-09 | 2000-03-23 | Mahalek Franz Helmut | Bandschleifmaschine |
ATE238133T1 (de) | 1998-12-24 | 2003-05-15 | Steinemann Technology Ag | Breitschleifmaschine |
DE102004041364A1 (de) | 2004-08-25 | 2006-03-02 | Heesemann, Jürgen, Dipl.-Ing. | Bandschleifmaschine |
-
2009
- 2009-01-22 CH CH00095/09A patent/CH700303A2/de not_active Application Discontinuation
-
2010
- 2010-01-21 PL PL10000575T patent/PL2210705T3/pl unknown
- 2010-01-21 EP EP10000575.0A patent/EP2210705B1/de not_active Not-in-force
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109732464A (zh) * | 2019-03-08 | 2019-05-10 | 苏州亨允晟机电科技有限公司 | 一种专用于建筑石材和/或板材的抛光机构 |
CN111390719A (zh) * | 2020-05-12 | 2020-07-10 | 温州光挺电子科技有限公司 | 一种电子标签卡回收设备 |
CN111390719B (zh) * | 2020-05-12 | 2020-12-25 | 广西电网有限责任公司贺州供电局 | 一种电子标签卡回收设备 |
Also Published As
Publication number | Publication date |
---|---|
PL2210705T3 (pl) | 2015-04-30 |
EP2210705A3 (de) | 2013-04-03 |
CH700303A2 (de) | 2010-07-30 |
EP2210705A2 (de) | 2010-07-28 |
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