EP2712701A1 - Method and device for machining workpieces - Google Patents

Method and device for machining workpieces Download PDF

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Publication number
EP2712701A1
EP2712701A1 EP13183383.2A EP13183383A EP2712701A1 EP 2712701 A1 EP2712701 A1 EP 2712701A1 EP 13183383 A EP13183383 A EP 13183383A EP 2712701 A1 EP2712701 A1 EP 2712701A1
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EP
European Patent Office
Prior art keywords
pressure roller
reel
finishing
speed
finishing belt
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Granted
Application number
EP13183383.2A
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German (de)
French (fr)
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EP2712701B1 (en
Inventor
Derya Lenbet
Thomas Schmitz
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Thielenhaus Technologies GmbH
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Thielenhaus Technologies GmbH
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Publication of EP2712701A1 publication Critical patent/EP2712701A1/en
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    • 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
    • B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
    • B24B19/08—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding non-circular cross-sections, e.g. shafts of elliptical or polygonal cross-section
    • B24B19/12—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding non-circular cross-sections, e.g. shafts of elliptical or polygonal cross-section for grinding cams or camshafts
    • 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
    • B24B21/16—Machines or devices using grinding or polishing belts; Accessories therefor for grinding other surfaces of particular shape
    • 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

Definitions

  • the invention relates to a method for band finishing of workpieces which are set in rotation during the finish machining with alternating direction of rotation.
  • a finishing belt is withdrawn from a tape roll, passed around a rotatably mounted pressure roller and wound by means of a reel on an empty tube.
  • a guided around the pressure roller belt section of the finishing belt acts on the workpiece and performs with the pressure roller oscillating movements transversely to the web direction of the finishing belt.
  • the method can be used for the finest machining of circumferential surfaces of undulating or rotationally symmetrical workpieces.
  • the workpiece is driven in rotation and superimposed on the rotation of the workpiece an oscillating movement of the tool surface formed by the finishing belt.
  • the finishing tape is mechanically worn at the contact point.
  • a tape feed a non-worn tool surface is always provided for finishing machining.
  • the finishing belt does not run continuously as an endless belt, but is pulled off from a belt roll and wound up by means of a reel.
  • the rotation of the workpiece is usually opposite to the direction of movement of the finishing belt. The opposite rotation increases the tension acting on the finishing belt in the processing station and ensures that the finishing belt is firmly seated against the pressure roller.
  • the invention has for its object to ensure a uniform tape run of the finishing tape on the pressure roller.
  • a braking force is exerted on the pressure roller in order to ensure a uniform strip movement of the finishing belt when the direction of rotation of the rotating workpiece changes during the finishing process.
  • the braking force set on the pressure roller is expediently greater than the frictional force which is exerted by the workpiece on the finishing belt in the case of a rotational movement of the workpiece which is in the same direction as the direction of movement of the finishing belt.
  • a constant braking force is generated on a pressure roller by means of a braking device. It can be used a mechanical braking device.
  • the finishing belt is guided around the pressure roller with a constant withdrawal speed predetermined by a drive, and the rotational movement of the pressure roller is kinematically associated with the movement of the drive is coupled.
  • a rotary drive can be used which is driven at a constant speed regardless of the diameter of the wound reel, wherein the rotational speed of the rotary drive is set so that the winding speed corresponding to the rotational speed of the drive corresponds at least to the withdrawal speed of the finishing belt.
  • a slip clutch to compensate for the differential speed between the predetermined by the rotary drive winding speed and the take-off speed is arranged.
  • the reel can also be operated with a variable-speed reel drive, which adjusts the take-up speed to the predetermined take-off speed of the finishing belt, depending on the reel diameter of the finish belt wound on the reel.
  • the rotational movement of the tape roll is also slowed down when the finishing tape is removed.
  • the braking force set at the reel is constant.
  • the invention also provides a device according to claim 8 for carrying out the method described.
  • the device and advantageous embodiments of this device are explained below with reference toquipsbeetter.
  • the device shown in the figures comprises an unwinder 1 for a tape roll 2, a reel 3 for winding a withdrawn from the tape roll 2 finishing belt 4, a rotary drive 5 for the reel 3 and a connected to an oscillating device 6 pressure roller 7.
  • the finishing tape 4 is withdrawn from the tape roll 2, passed around the pressure roller 7 and wound by means of the reel 3 on an empty tube 8.
  • a guided around the pressure roller 7 belt section of the finishing belt 4 acts on the workpiece and performs with the pressure roller 7 oscillating movements transverse to the web direction of the finishing belt 4.
  • the unwinder 1, the reel 3, the rotary drive 5, the pressure roller 7 and the oscillation device 6 are arranged on a support 9 and form a linearly adjustable assembly.
  • the assembly is arranged on a feed carriage 10 in the exemplary embodiment, which is adjustable for example by a linear drive 11, preferably a pneumatic drive.
  • a linear drive 11 preferably a pneumatic drive.
  • the pressure roller 7 is mounted on an oscillation device 6, which is attached to leaf springs and short-stroke oscillatory movements transversely to the web direction of the finishing belt 4 performs.
  • the pressure roller 7 has a rotatably mounted sleeve 20 with a contact surface 21 for the finishing belt 4 and that in the interior of the sleeve 20 is a spring-loaded Brake disc 22 is arranged to generate a force acting on the sleeve 20 brake force.
  • an adjusting device 25 is arranged for adjusting the force acting on the brake disc 22 spring force.
  • a braking force is exerted on the pressure roller 7 to produce a rotational movement independent of the direction of rotation of the workpiece.
  • the braking force set on the pressure roller 7 is greater than the frictional force exerted by the workpiece on the finishing belt 4 in the case of a rotational movement of the workpiece in the same direction for moving the finishing belt.
  • the braking device 12 generates a constant braking force and ensures that the finishing belt 4 rests against the pressure roller 7 with a sufficiently large pulling force. As a result, a uniform movement of the finishing belt is ensured regardless of the direction of rotation of the workpiece rotating during finish machining.
  • a drive 13 for generating a constant take-off speed of the finishing belt 4 is arranged.
  • the drive 13 has a driven at a constant speed and kinematically coupled to the pressure roller 7 drive roller 14.
  • the arrangement causes the finishing belt 4 is guided around the pressure roller 7 with a constant withdrawal speed predetermined by the drive 13.
  • the reel 3 is adjusted so that the winding of the finishing belt 4 is ensured at all roll diameters.
  • the rotational speed of the rotary drive 5 driving the reel is determined so that the take-up speed corresponding to the rotational speed of the rotary drive corresponds at least to the withdrawal speed of the finishing belt 4.
  • Between the rotary drive 5 and the reel 3 is preferably a connection with a slip clutch to compensate for the differential speed between the by the rotary drive 5 predetermined winding speed and the take-off speed arranged.
  • the rotational movement of the roll of tape 2 is also braked when removing the finishing belt 4.
  • an unwinder 1 is used with a conventional brake.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

The method involves pulling off a finishing strip (4) from a tape roll (2), where the strip is led to a rotatably mounted pressure roller (7), and the strip is wound on a winder (3) on an empty tube (8). A band portion of the finishing strip guided to the pressure roller is allowed to act on a workpiece. A braking force is exerted on the pressure roller for providing a strip operation over the pressure roller if the rotation direction of a workpiece changes during finish processing. An independent claim is also included for a device for strip finishing of workpieces.

Description

Die Erfindung betrifft ein Verfahren zum Bandfinishen von Werkstücken, die während der Finishbearbeitung mit wechselnder Drehrichtung in Rotation versetzt werden.The invention relates to a method for band finishing of workpieces which are set in rotation during the finish machining with alternating direction of rotation.

Bei dem Verfahren, von dem die Erfindung ausgeht, wird ein Finishband von einer Bandrolle abgezogen, um eine drehbar gelagerte Druckrolle geführt und mittels einer Haspel auf eine Leerhülse aufgewickelt. Dabei wirkt ein um die Druckrolle geführter Bandabschnitt des Finishbandes auf das Werkstück und führt mit der Druckrolle oszillierende Bewegungen quer zur Bahnrichtung des Finishbandes aus. Verfahren mit den beschriebenen Merkmalen sowie eine Vorrichtung zur Durchführung des Verfahrens ist aus DE 20 2011 003 176 U1 bekannt.In the method, from which the invention proceeds, a finishing belt is withdrawn from a tape roll, passed around a rotatably mounted pressure roller and wound by means of a reel on an empty tube. In this case, a guided around the pressure roller belt section of the finishing belt acts on the workpiece and performs with the pressure roller oscillating movements transversely to the web direction of the finishing belt. Method with the features described and an apparatus for carrying out the method is made of DE 20 2011 003 176 U1 known.

Das Verfahren kann zur Feinstbearbeitung von Umfangflächen an wellenförmigen bzw. rotationssymmetrischen Werkstücken eingesetzt werden. Dabei wird das Werkstück rotierend angetrieben und der Rotation des Werkstückes eine oszillierende Bewegung der durch das Finishband gebildeten Werkzeugfläche überlagert. Das Finishband wird an der Kontaktstelle mechanisch abgenutzt. Durch einen Bandvorschub wird für die Finishbearbeitung stets eine nicht abgenutzte Werkzeugfläche zur Verfügung gestellt. Im Unterschied zum Bandschleifen läuft das Finishband nicht als Endlosband kontinuierlich um, sondern wird von einer Bandrolle abgezogen und mittels einer Haspel aufgewickelt. Die Rotation des Werkstückes ist üblicherweise der Bewegungsrichtung des Finishbandes entgegengesetzt. Die entgegengesetzte Rotation vergrößert die in der Bearbeitungsstelle auf das Finishband wirkenden Zugspannung und stellt sicher, dass das Finishband fest an der Druckrolle anliegt. Bei der Finishbearbeitung von Nockenflächen und ähnlichen Werkstücken, die bei einer Drehbewegung eine auflaufende und wieder ablaufende Flanke aufweisen, wird die Drehrichtung des Werkstückes während der Finishbearbeitung gewechselt. Bei einer Drehrichtung, die gleichsinnig zur Bahnrichtung des Finishbandes ist, reduziert sich die Zugspannung an der Bearbeitungsstelle und besteht die Gefahr der Bildung einer Lose. Um diesem Effekt entgegenzuwirken, muss die Bremskraft des Abwicklers stark erhöht werden. Die Folge ist ein ruckhafter Lauf des Finishbandes.The method can be used for the finest machining of circumferential surfaces of undulating or rotationally symmetrical workpieces. In this case, the workpiece is driven in rotation and superimposed on the rotation of the workpiece an oscillating movement of the tool surface formed by the finishing belt. The finishing tape is mechanically worn at the contact point. By a tape feed a non-worn tool surface is always provided for finishing machining. In contrast to belt grinding, the finishing belt does not run continuously as an endless belt, but is pulled off from a belt roll and wound up by means of a reel. The rotation of the workpiece is usually opposite to the direction of movement of the finishing belt. The opposite rotation increases the tension acting on the finishing belt in the processing station and ensures that the finishing belt is firmly seated against the pressure roller. In finishing machining of cam surfaces and similar workpieces during a rotary motion have a tapered and re-running edge, the direction of rotation of the workpiece is changed during finishing. In a direction of rotation, which is in the same direction to the web direction of the finishing belt, reduces the tension at the processing site and there is a risk of the formation of a lot. To counteract this effect, the brake force of the unwinder must be greatly increased. The result is a jerky run of the finishing tape.

Vor diesem Hintergrund liegt der Erfindung die Aufgabe zugrunde, einen gleichmäßigen Bandlauf des Finishbandes über die Druckrolle zu gewährleisten.Against this background, the invention has for its object to ensure a uniform tape run of the finishing tape on the pressure roller.

Gegenstand der Erfindung und Lösung dieser Aufgabe ist ein Verfahren nach Anspruch 1.The object of the invention and solution of this problem is a method according to claim 1.

Erfindungsgemäß wird auf die Druckrolle eine Bremskraft ausgeübt, um einen gleichmäßigen Bandlauf des Finishbandes zu gewährleisten, wenn die Drehrichtung des rotierenden Werkstücks während der Finishbearbeitung wechselt. Die an der Druckrolle eingestellte Bremskraft ist dabei zweckmäßig größer als die Reibungskraft, die bei einer zur Bewegungsrichtung des Finishbandes gleichsinnigen Rotationsbewegung des Werkstückes von dem Werkstück auf das Finishband ausgeübt wird.According to the invention, a braking force is exerted on the pressure roller in order to ensure a uniform strip movement of the finishing belt when the direction of rotation of the rotating workpiece changes during the finishing process. The braking force set on the pressure roller is expediently greater than the frictional force which is exerted by the workpiece on the finishing belt in the case of a rotational movement of the workpiece which is in the same direction as the direction of movement of the finishing belt.

Vorzugsweise wird mittels einer Bremsvorrichtung eine konstante Bremskraft an einer Druckrolle erzeugt. Es kann eine mechanische Bremsvorrichtung eingesetzt werden.Preferably, a constant braking force is generated on a pressure roller by means of a braking device. It can be used a mechanical braking device.

Es ist vorteilhaft, wenn das Finishband mit einer von einem Antrieb vorgegebenen konstanten Abzugsgeschwindigkeit um die Druckrolle geführt wird und die Drehbewegung der Druckrolle mit der Bewegung des Antriebes kinematisch gekoppelt wird. Zum Antreiben der Haspel kann dabei ein Drehantrieb verwendet werden, der unabhängig von dem Durchmesser der aufgewickelten Bandrolle mit einer konstanten Drehzahl angetrieben wird, wobei die Drehzahl des Drehantriebes so festgelegt ist, dass die der Drehzahl des Drehantriebes entsprechende Aufwickelgeschwindigkeit zumindest der Abzugsgeschwindigkeit des Finishbandes entspricht. Zwischen dem Drehantrieb und der Haspel wird eine Rutschkupplung zum Ausgleich der Differenzgeschwindigkeit zwischen der durch den Drehantrieb vorgegebenen Aufwickelgeschwindigkeit und der Abzugsgeschwindigkeit angeordnet. Alternativ kann die Haspel auch mit einem drehzahlgeregelten Haspelantrieb betrieben werden, der in Abhängigkeit des Rollendurchmessers des auf der Haspel aufgewickelten Finishbandes die Aufwickelgeschwindigkeit an die vorgegebene Abzugsgeschwindigkeit des Finishbandes anpasst.It is advantageous if the finishing belt is guided around the pressure roller with a constant withdrawal speed predetermined by a drive, and the rotational movement of the pressure roller is kinematically associated with the movement of the drive is coupled. To drive the reel, a rotary drive can be used which is driven at a constant speed regardless of the diameter of the wound reel, wherein the rotational speed of the rotary drive is set so that the winding speed corresponding to the rotational speed of the drive corresponds at least to the withdrawal speed of the finishing belt. Between the rotary drive and the reel a slip clutch to compensate for the differential speed between the predetermined by the rotary drive winding speed and the take-off speed is arranged. Alternatively, the reel can also be operated with a variable-speed reel drive, which adjusts the take-up speed to the predetermined take-off speed of the finishing belt, depending on the reel diameter of the finish belt wound on the reel.

Bei allen zuvor beschriebenen Ausführungen des erfindungsgemäßen Verfahrens wird auch die Drehbewegung der Bandrolle beim Abziehen des Finishbandes gebremst. Die an der Bandrolle eingestellte Bremskraft ist dabei konstant.In all the above-described embodiments of the method according to the invention, the rotational movement of the tape roll is also slowed down when the finishing tape is removed. The braking force set at the reel is constant.

Gegenstand der Erfindung ist auch eine Vorrichtung nach Anspruch 8 zur Durchführung des beschriebenen Verfahrens. Die Vorrichtung sowie vorteilhafte Ausgestaltungen dieser Vorrichtung werden im Folgenden anhand von Ausführungsbespielen erläutert.The invention also provides a device according to claim 8 for carrying out the method described. The device and advantageous embodiments of this device are explained below with reference to Ausführungsbespielen.

Es zeigen schematisch:

Fig. 1
eine Vorrichtung zum Bandfinishen von Werkstücken,
Fig. 2
die Rückseite der in Fig. 1 dargestellten Vorrichtung,
Fig. 3
einen Längsschnitt durch eine Druckrolle der in Fig. 1 dargestellten Vorrichtung,
Fig. 4
eine weitere Ausgestaltung der erfindungsgemäßen Vorrichtung.
They show schematically:
Fig. 1
a device for band finishing of workpieces,
Fig. 2
the back of the in Fig. 1 illustrated device,
Fig. 3
a longitudinal section through a pressure roller in Fig. 1 illustrated device,
Fig. 4
a further embodiment of the device according to the invention.

Die in den Figuren dargestellte Vorrichtung weist einen Abwickler 1 für eine Bandrolle 2, eine Haspel 3 zum Aufwickeln eines von der Bandrolle 2 abgezogenen Finishbandes 4, einen Drehantrieb 5 für die Haspel 3 sowie eine an eine Oszillationseinrichtung 6 angeschlossene Druckrolle 7 auf. Das Finishband 4 wird von der Bandrolle 2 abgezogen, um die Druckrolle 7 geführt und mittels der Haspel 3 auf eine Leerhülse 8 aufgewickelt. Dabei wirkt ein um die Druckrolle 7 geführter Bandabschnitt des Finishbandes 4 auf das Werkstück und führt mit der Druckrolle 7 oszillierende Bewegungen quer zur Bahnrichtung des Finishbandes 4 aus. Der Abwickler 1, die Haspel 3, der Drehantrieb 5, die Druckrolle 7 und die Oszillationseinrichtung 6 sind an einem Träger 9 angeordnet und bilden eine linear verstellbare Baugruppe. Dabei ist in dem Ausführungsbeispiel die Baugruppe auf einem Zustellschlitten 10 angeordnet, der beispielsweise durch einen Linearantrieb 11, vorzugsweise einen pneumatischen Antrieb, verstellbar ist. Mittels des Linearantriebes 11 kann der Anpressdruck zwischen dem Finishband 4 und der Werkstückfläche eingestellt und variiert werden.The device shown in the figures comprises an unwinder 1 for a tape roll 2, a reel 3 for winding a withdrawn from the tape roll 2 finishing belt 4, a rotary drive 5 for the reel 3 and a connected to an oscillating device 6 pressure roller 7. The finishing tape 4 is withdrawn from the tape roll 2, passed around the pressure roller 7 and wound by means of the reel 3 on an empty tube 8. In this case, a guided around the pressure roller 7 belt section of the finishing belt 4 acts on the workpiece and performs with the pressure roller 7 oscillating movements transverse to the web direction of the finishing belt 4. The unwinder 1, the reel 3, the rotary drive 5, the pressure roller 7 and the oscillation device 6 are arranged on a support 9 and form a linearly adjustable assembly. In this case, the assembly is arranged on a feed carriage 10 in the exemplary embodiment, which is adjustable for example by a linear drive 11, preferably a pneumatic drive. By means of the linear drive 11, the contact pressure between the finishing belt 4 and the workpiece surface can be adjusted and varied.

Die Druckrolle 7 ist an einer Oszillationseinrichtung 6 gelagert, die an Blattfedern befestigt ist und kurzhubige Schwingbewegungen quer zur Bahnrichtung des Finishbandes 4 ausführt.The pressure roller 7 is mounted on an oscillation device 6, which is attached to leaf springs and short-stroke oscillatory movements transversely to the web direction of the finishing belt 4 performs.

Aus einer vergleichenden Betrachtung der Fig. 2 und 3 geht hervor, dass die Druckrolle 7 eine drehbeweglich gelagerte Hülse 20 mit einer Anlagefläche 21 für das Finishband 4 aufweist und dass im Innern der Hülse 20 eine federbelastete Bremsscheibe 22 zur Erzeugung einer auf die Hülse 20 wirkenden Bremskraft angeordnet ist. Auf einer Achse 23, an welcher die Hülse an Wälzlagern 24 gelagert ist, ist eine Verstelleinrichtung 25 zur Einstellung der auf die Bremsscheibe 22 wirkenden Federkraft angeordnet.From a comparative analysis of the Fig. 2 and 3 shows that the pressure roller 7 has a rotatably mounted sleeve 20 with a contact surface 21 for the finishing belt 4 and that in the interior of the sleeve 20 is a spring-loaded Brake disc 22 is arranged to generate a force acting on the sleeve 20 brake force. On an axis 23, on which the sleeve is mounted on roller bearings 24, an adjusting device 25 is arranged for adjusting the force acting on the brake disc 22 spring force.

Bei der in den Fig. 1, 2 und 3 dargestellten Vorrichtung wird auf die Druckrolle 7 eine Bremskraft zur Erzeugung einer von der Drehrichtung des Werkstückes unabhängigen Drehbewegung ausgeübt. Die an der Druckrolle 7 eingestellte Bremskraft ist dabei größer als die Reibungskraft, die bei einer zur Bewegung des Finishbandes gleichsinnigen Rotationsbewegung des Werkstückes von dem Werkstück auf das Finishband 4 ausgeübt wird. Die Bremsvorrichtung 12 erzeugt eine konstante Bremskraft und stellt sicher, dass das Finishband 4 mit einer ausreichend großen Zugkraft an der Druckrolle 7 anliegt. Dadurch ist eine gleichförmige Bewegung des Finishbandes ungeachtet der Drehrichtung des bei der Finishbearbeitung rotierenden Werkstückes gewährleistet.In the in the Fig. 1 . 2 and 3 1, a braking force is exerted on the pressure roller 7 to produce a rotational movement independent of the direction of rotation of the workpiece. The braking force set on the pressure roller 7 is greater than the frictional force exerted by the workpiece on the finishing belt 4 in the case of a rotational movement of the workpiece in the same direction for moving the finishing belt. The braking device 12 generates a constant braking force and ensures that the finishing belt 4 rests against the pressure roller 7 with a sufficiently large pulling force. As a result, a uniform movement of the finishing belt is ensured regardless of the direction of rotation of the workpiece rotating during finish machining.

Im Ausführungsbeispiel der Fig. 4 ist zwischen der Druckrolle 7 und der Haspel 3 ein Antrieb 13 zur Erzeugung einer konstanten Abzugsgeschwindigkeit des Finishbandes 4 angeordnet. Der Antrieb 13 weist eine mit konstanter Drehzahl angetriebene und kinematisch mit der Druckrolle 7 gekoppelte Antriebsrolle 14 auf. Die Anordnung bewirkt, dass das Finishband 4 mit einer von dem Antrieb 13 vorgegebenen konstanten Abzugsgeschwindigkeit um die Druckrolle 7 geführt wird. Die Haspel 3 wird so eingestellt, dass die Aufwicklung des Finishbandes 4 bei allen Rollendurchmessern gewährleistet ist. Die Drehzahl des die Haspel antreibenden Drehantriebes 5 wird so festgelegt, dass die der Drehzahl des Drehantriebes entsprechende Aufwickelgeschwindigkeit zumindest der Abzugsgeschwindigkeit des Finishbandes 4 entspricht. Zwischen dem Drehantrieb 5 und der Haspel 3 ist vorzugsweise eine Verbindung mit einer Rutschkupplung zum Ausgleich der Differenzgeschwindigkeit zwischen der durch den Drehantrieb 5 vorgegebenen Aufwickelgeschwindigkeit und der Abzugsgeschwindigkeit angeordnet.In the embodiment of Fig. 4 is between the pressure roller 7 and the reel 3, a drive 13 for generating a constant take-off speed of the finishing belt 4 is arranged. The drive 13 has a driven at a constant speed and kinematically coupled to the pressure roller 7 drive roller 14. The arrangement causes the finishing belt 4 is guided around the pressure roller 7 with a constant withdrawal speed predetermined by the drive 13. The reel 3 is adjusted so that the winding of the finishing belt 4 is ensured at all roll diameters. The rotational speed of the rotary drive 5 driving the reel is determined so that the take-up speed corresponding to the rotational speed of the rotary drive corresponds at least to the withdrawal speed of the finishing belt 4. Between the rotary drive 5 and the reel 3 is preferably a connection with a slip clutch to compensate for the differential speed between the by the rotary drive 5 predetermined winding speed and the take-off speed arranged.

Die Drehbewegung der Bandrolle 2 wird beim Abziehen des Finishbandes 4 ebenfalls gebremst. Dazu wird ein Abwickler 1 mit einer üblichen Bremse verwendet.The rotational movement of the roll of tape 2 is also braked when removing the finishing belt 4. For this purpose, an unwinder 1 is used with a conventional brake.

Claims (11)

Verfahren zum Bandfinishen von Werkstücken, die während der Finishbearbeitung mit wechselnder Drehrichtung in Rotation versetzt werden,
wobei ein Finishband (4) von einer Bandrolle (2) abgezogen, um eine drehbar gelagerte Druckrolle (7) geführt und mittels einer Haspel (3) auf eine Leerhülse (8) aufgewickelt wird,
wobei ein um die Druckrolle (7) geführter Bandabschnitt des Finishbandes (4) auf das Werkstück wirkt und mit der Druckrolle (7) oszillierende Bewegungen quer zur Bahnrichtung des Finishbandes (4) ausführt,
dadurch gekennzeichnet, dass auf die Druckrolle (7) eine Bremskraft ausgeübt wird, um einen gleichmäßigen Bandlauf des Finishbandes (4) zu gewährleisten, wenn die Drehrichtung des rotierenden Werkstücks während der Finishbearbeitung wechselt.Method for band finishing of workpieces which are set in rotation during finish machining with alternating direction of rotation,
wherein a finishing belt (4) is withdrawn from a belt reel (2), guided around a rotatably mounted pressure roller (7) and wound on an empty tube (8) by means of a reel (3),
wherein a belt section of the finishing belt (4) guided around the pressure roller (7) acts on the workpiece and performs oscillating movements transversely to the web direction of the finishing belt (4) with the pressure roller (7),
characterized in that on the pressure roller (7) a braking force is exerted to ensure a uniform tape run of the finishing belt (4), when the direction of rotation of the rotating workpiece changes during finishing. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die an der Druckrolle (7) eingestellte Bremskraft größer ist als die Reibungskraft, die bei einer zur Bewegung des Finishbandes (4) gleichsinnigen Rotationsbewegung des Werkstückes von dem Werkstück auf das Finishband (4) ausgeübt wird.Method according to claim 1, characterized in that the braking force set on the pressure roller (7) is greater than the frictional force exerted by the workpiece on the finishing belt (4) during a rotational movement of the workpiece in the same direction for moving the finishing belt (4). Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass mittels einer Bremsvorrichtung (12) eine konstante Bremskraft an der Druckrolle (7) erzeugt wird.A method according to claim 1 or 2, characterized in that by means of a braking device (12) a constant braking force on the pressure roller (7) is generated. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass das Finishband (4) mit einer von einem Antrieb (13) vorgegebenen konstanten Abzugsgeschwindigkeit um die Druckrolle (7) geführt wird und dass die Drehbewegung der Druckrolle (7) mit der Bewegung des Antriebs (13) kinematisch gekoppelt ist.Method according to one of Claims 1 to 3, characterized in that the finishing belt (4) is guided around the pressure roller (7) at a constant take-off speed predetermined by a drive (13) and in that the rotational movement the pressure roller (7) is kinematically coupled to the movement of the drive (13). Verfahren nach Anspruch 4, dadurch gekennzeichnet, dass zum Antreiben der Haspel (3) ein Drehantrieb (5) verwendet wird, der unabhängig von dem Durchmesser der aufgewickelten Bandrolle mit einer konstanten Drehzahl angetrieben wird, wobei die Drehzahl des Drehantriebes (5) so festgelegt ist, dass die der Drehzahl des Drehantriebes (5) entsprechende Aufwickelgeschwindigkeit zumindest der Abzugsgeschwindigkeit des Finishbandes (4) entspricht und dass zwischen dem Drehantrieb (5) und der Haspel (3) eine Rutschkupplung zum Ausgleich einer Differenzgeschwindigkeit zwischen der durch den Drehantrieb (5) vorgegebenen Aufwickelgeschwindigkeit und der Abzugsgeschwindigkeit angeordnet wird.A method according to claim 4, characterized in that for driving the reel (3) a rotary drive (5) is used, which is driven independently of the diameter of the wound roll of tape at a constant speed, wherein the rotational speed of the rotary drive (5) is set in that the winding speed corresponding to the rotational speed of the rotary drive (5) corresponds at least to the withdrawal speed of the finishing belt (4) and that between the rotary drive (5) and the reel (3) a slip clutch for compensating a differential speed between the predetermined by the rotary drive (5) Winding speed and the withdrawal speed is arranged. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Haspel (3) von einem drehzahlgeregelten Haspelantrieb angetrieben wird, der in Abhängigkeit des Rollendurchmessers des auf der Haspel (3) aufgewickelten Finishbandes (4) die Aufwickelgeschwindigkeit an die vorgegebene Abzugsgeschwindigkeit des Finishbandes (4) anpasst.Method according to one of claims 1 to 4, characterized in that the reel (3) is driven by a variable speed reel drive, depending on the roll diameter of the wound on the reel (3) finishing belt (4) the winding speed to the predetermined take-off speed of the finishing belt (4) adapts. Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Drehbewegung der Bandrolle (2) beim Abziehen des Finishbandes (4) gebremst wird.Method according to one of claims 1 to 6, characterized in that the rotational movement of the roll of tape (2) when removing the finishing belt (4) is braked. Vorrichtung zur Durchführung des Verfahrens nach einem der Ansprüche 1 bis 7, mit
einem Abwickler (1) für eine Bandrolle (2),
einer Haspel (3) zum Aufwickeln eines von der Bandrolle (2) abgezogenen Finishbandes (4),
einem Drehantrieb (5) für die Haspel (3) und
einer an eine Oszillationseinrichtung (6) angeschlossenen Druckrolle (7),
wobei das Finishband (4) um die Druckrolle (7) geführt ist und wobei der Abwickler (1), die Haspel (3), der Drehantrieb (5), die Druckrolle (7) und die Oszillationseinrichtung (6) auf einem Träger (9) angeordnet sind und eine linear verstellbare Braugruppe bilden, dadurch gekennzeichnet, dass der Druckrolle (7) eine Bremsvorrichtung (12) zur Erzeugung einer von der Drehrichtung des Werkstückes unabhängigen Drehbewegung der Druckrolle (7) zugeordnet ist.Apparatus for carrying out the method according to one of claims 1 to 7, with
an unwinder (1) for a roll of tape (2),
a reel (3) for winding a finishing strip (4) drawn from the reel (2),
a rotary drive (5) for the reel (3) and
a pressure roller (7) connected to an oscillation device (6),
wherein the finishing belt (4) is guided around the pressure roller (7) and wherein the unwinder (1), the reel (3), the rotary drive (5), the pressure roller (7) and the oscillation device (6) are mounted on a support (9 ) are arranged and form a linearly adjustable brewing unit, characterized in that the pressure roller (7) is associated with a braking device (12) for generating a rotational movement of the pressure roller (7) independent of the direction of rotation of the workpiece. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, dass die Druckrolle (7) eine drehbeweglich gelagerte Hülse (20) mit einer Anlagefläche (21) für das Finishband (4) aufweist und dass im Innern der Hülse (20) eine federbelastete Bremsscheibe (22) zur Erzeugung einer auf die Hülse (20) wirkenden Bremskraft angeordnet ist.Apparatus according to claim 8, characterized in that the pressure roller (7) has a rotatably mounted sleeve (20) with a contact surface (21) for the finishing belt (4) and that in the interior of the sleeve (20) has a spring-loaded brake disc (22) Generation of a force acting on the sleeve (20) braking force is arranged. Vorrichtung nach Anspruch 9, dadurch gekennzeichnet, dass die Hülse (20) an Wälzlagern (24) auf einer Achse (23) drehbar gelagert ist und daß auf der Achse (23) eine Verstelleinrichtung (25) zur Einstellung der auf die Bremsscheibe (22) wirkenden Federkraft angeordnet ist.Apparatus according to claim 9, characterized in that the sleeve (20) on rolling bearings (24) on an axis (23) is rotatably mounted and that on the axis (23) an adjusting device (25) for adjusting the brake disc (22) acting spring force is arranged. Vorrichtung nach einem der Ansprüche 8 bis 10, dadurch gekennzeichnet, dass zwischen der Druckrolle (7) und der Haspel (3) ein Antrieb (13) zur Erzeugung einer konstanten Abzugsgeschwindigkeit des Finishbandes (4) angeordnet ist, wobei der Antrieb eine mit konstanter Drehzahl angetriebene und kinematisch mit der Druckrolle (7) gekoppelte Antriebsrolle (14) aufweist.Device according to one of claims 8 to 10, characterized in that between the pressure roller (7) and the reel (3) a drive (13) for generating a constant take-off speed of the finishing belt (4) is, wherein the drive has a driven at a constant speed and kinematically coupled to the pressure roller (7) drive roller (14).
EP20130183383 2012-09-28 2013-09-06 Method and device for machining workpieces Active EP2712701B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE201210109264 DE102012109264B3 (en) 2012-09-28 2012-09-28 Method and device for band finishing of workpieces

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EP2712701A1 true EP2712701A1 (en) 2014-04-02
EP2712701B1 EP2712701B1 (en) 2015-05-06

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IT201600091311A1 (en) * 2016-09-09 2018-03-09 Bersigotti Patrizia PROCESSING APPARATUS
DE102017121293A1 (en) 2017-09-14 2019-03-14 Thielenhaus Technologies Gmbh Device for processing a workpiece by means of a belt and method for operating a corresponding device
CN109623657A (en) * 2019-02-20 2019-04-16 上海爱仕达机器人有限公司 A kind of control system of big polishing machine
CN109623616A (en) * 2019-02-20 2019-04-16 上海爱仕达机器人有限公司 A kind of big polishing machine

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Publication number Priority date Publication date Assignee Title
CN111251129B (en) * 2020-03-03 2021-01-22 河南理工大学 Cam chuck structure for grinding cam shaft

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DE8717353U1 (en) * 1987-12-07 1989-01-05 Heinrich Zeidler Maschinenfabrik Gmbh & Co Kg, 8672 Selb Device for step-by-step movement and tensioning of the sanding belt of disc-base continuous sanding machines
DE3844359A1 (en) * 1988-12-30 1990-07-05 Bosch Gmbh Robert Belt grinder
DE202011003176U1 (en) 2011-02-24 2011-05-05 Thielenhaus Technologies Gmbh Device for band finishing

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DE8717353U1 (en) * 1987-12-07 1989-01-05 Heinrich Zeidler Maschinenfabrik Gmbh & Co Kg, 8672 Selb Device for step-by-step movement and tensioning of the sanding belt of disc-base continuous sanding machines
DE3844359A1 (en) * 1988-12-30 1990-07-05 Bosch Gmbh Robert Belt grinder
DE202011003176U1 (en) 2011-02-24 2011-05-05 Thielenhaus Technologies Gmbh Device for band finishing

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201600091311A1 (en) * 2016-09-09 2018-03-09 Bersigotti Patrizia PROCESSING APPARATUS
WO2018047103A1 (en) * 2016-09-09 2018-03-15 BERSIGOTTI, Patrizia Machining apparatus
DE102017121293A1 (en) 2017-09-14 2019-03-14 Thielenhaus Technologies Gmbh Device for processing a workpiece by means of a belt and method for operating a corresponding device
CN109623657A (en) * 2019-02-20 2019-04-16 上海爱仕达机器人有限公司 A kind of control system of big polishing machine
CN109623616A (en) * 2019-02-20 2019-04-16 上海爱仕达机器人有限公司 A kind of big polishing machine
CN109623657B (en) * 2019-02-20 2023-09-08 上海爱仕达机器人有限公司 Control system of big burnishing machine
CN109623616B (en) * 2019-02-20 2023-09-08 上海爱仕达机器人有限公司 Big burnishing machine

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EP2712701B1 (en) 2015-05-06
DE102012109264B3 (en) 2014-03-13

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