EP1514643B1 - Process for finishing the surface of revoluton of shafts - Google Patents

Process for finishing the surface of revoluton of shafts Download PDF

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Publication number
EP1514643B1
EP1514643B1 EP20040020484 EP04020484A EP1514643B1 EP 1514643 B1 EP1514643 B1 EP 1514643B1 EP 20040020484 EP20040020484 EP 20040020484 EP 04020484 A EP04020484 A EP 04020484A EP 1514643 B1 EP1514643 B1 EP 1514643B1
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Prior art keywords
workpiece
belt
grinding belt
machining
grinding
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German (de)
French (fr)
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EP1514643A1 (en
Inventor
Horst Dipl.-Ing. Steinwender
Martin Dipl.-Ing. Wolters
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Thielenhaus Technologies GmbH
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Thielenhaus Technologies GmbH
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B21/00Machines or devices using grinding or polishing belts; Accessories therefor
    • B24B21/02Machines or devices using grinding or polishing belts; Accessories therefor for grinding rotationally symmetrical surfaces

Definitions

  • a method for finish machining peripheral surfaces on wave-shaped workpieces is known from the document US 5,951,377.
  • the known method there is a point contact between the grinding belt and the workpiece during workpiece machining in a cutting plane perpendicular to the shaft axis.
  • US-B-6 220 946 discloses a method with the features described above.
  • the surface of the abrading belt assembly is made by tensioning the abrasive belt by means of a tensioner. Due to the tensile stress exerted on the sanding belt, the pressing force is used for finish machining is available, given. In order to apply a high cutting force, the use of a pressure shoe is proposed, which is applied to the outside of the sanding belt.
  • the flexibility of this prior art method is limited due to the fixed geometry of the An für tenus.
  • the invention has for its object to provide a method for finish machining of peripheral surfaces of wavy workpieces, with a high surface quality can be achieved and at the same time allows flexible workpiece machining.
  • the object is achieved by a method having the features of claim 1, in which the grinding belt is supported in the region of the workpiece surface by an endless, parallel to the sanding belt support belt, wherein the sanding belt and the support belt are rectified and moved at the same speed.
  • the looping of the workpiece ensures a large contact surface with a uniform surface pressure between the grinding belt and the workpiece.
  • a high surface quality can be achieved.
  • the support band By the support band, the tensile stress of the abrasive belt is significantly reduced and the abrasive belt is very uniform with a defined pressure force on the workpiece surface to be machined.
  • the support band may be made of metal or else of an elastomeric material.
  • the grinding belt is guided on a tool carrier via a clamping device and two deflections which limit a working area, and the workpiece is brought to the workpiece processing by a feed movement of the tool carrier and / or the workpiece clamping with a free-loaded abrasive belt section between the deflections in contact.
  • the wrap angle can be changed by changing the feed path of the workpiece carrier or workpiece clamping and an adapted thereto change the length of the grinding belt section.
  • the sanding belt is guided with a belt loop through an arranged in the circulation path of the sanding belt tape storage and controlled the length of the sanding belt section in the work area by means of the tape storage. This allows a change in the wrap angle during workpiece machining within a wide range.
  • the wrap angle can also be changed by a relative adjustment of the deflections to each other.
  • the wrap angle can be changed in an angle range between a few angular degrees and 270 °, wherein for many applications preferably a wrap angle of more than 180 ° is set.
  • the support belt is guided over a separate clamping device and driven continuously as well as the grinding belt.
  • both bands move rectified at the same speed, so that there is virtually no relative movement between the two bands in the contact area of the grinding belt and the support belt.
  • Fig. 1a shows a device for finish machining of peripheral surfaces of wavy workpieces.
  • the apparatus comprises a tool carrier 1, an endless grinding belt 2 for processing a workpiece 3 rotating about its axis of rotation A, a grinding belt drive 4 arranged on the tool carrier 1, which continuously drives the grinding belt 2 during workpiece machining, and a clamping device 5 for the grinding belt 2.
  • the tool carrier 1 has a machining head 6 with two mutually spaced band deflections 7, which limit a working area L of the machining head 6.
  • the band deflections 7 are formed as deflection rollers.
  • the grinding belt 2 is guided over the deflection rollers 7 and passes in the working area L past the peripheral surface of the workpiece 3 to be machined.
  • the machining head 6 engages around the peripheral surface of the workpiece 3 to be machined in a fork shape such that the grinding belt 2, which is freely tensioned in the working region L, partially wraps around the workpiece 3 and rests flat against the workpiece in a region predetermined by the wrap angle ⁇ .
  • the workpiece 3 shown in Fig. 1a is formed as a stepped shaft, the peripheral surfaces are processed successively with a different wrap angle ⁇ , ⁇ '.
  • a comparative consideration of Fig. 1a and 1b it can be seen that initially the smaller peripheral surface of the stepped shaft 3 is processed at a small wrap angle ⁇ , while then processing the large peripheral surface the stepped shaft 3 with a large wrap angle ⁇ 'takes place.
  • the grinding belt 2 is guided on the tool carrier 1 via the tensioning device 5 as well as on the two deflection rollers 7, which delimit the working area L.
  • the workpiece 3 is brought to workpiece machining by a feed movement of the tool carrier 1 with a free-loaded abrasive belt section 8 between the two guide rollers 7 in contact.
  • a different wrap angle ⁇ or ⁇ ' is present during the two processing steps according to FIGS. 1a and 1b, which is flexibly adapted to the processing of the respective workpiece surfaces.
  • the wrap angle ⁇ or ⁇ ' is changed by changes in the feed path of the workpiece carrier 1 and an adapted thereto length of the grinding belt section 8.
  • the abrasive belt 2 is guided here by a belt loop 9 through a belt store 10 arranged in the circulation path of the sanding belt.
  • the length of the abrasive belt section 8 in the work area L is controlled by means of the belt store 10 (see Figures 1a and 1b).
  • the grinding belt 2 is supported in the region of the workpiece surface by an endless supporting belt 11, which is tensioned parallel to the grinding belt 2.
  • the support band 11 is preferably made of metal. It is guided over a separate clamping device 12 and driven continuously as well as the grinding belt 2.
  • the bands 2, 11 move rectified at the same speed, so that there is virtually no relative movement between the two bands 2, 11 in the area of the contact surface between the support belt 11 and the sanding belt 2. As a result, an optimal discharge of the abrasive belt 2 is achieved.
  • FIGS. 1a to 2b show that a flexible workpiece machining is made possible by the change of the wrap angle.
  • the machining head 6 has for this purpose pivotable fork arms 16 on which the deflection rollers 7 are arranged. With this device, wrap angles of more than 180 ° can also be set, as can be seen directly from FIG. 2b. In the device shown in FIGS. 2a and 2b, the tensioning device 5 of the sanding belt 2 simultaneously assumes the function of a belt store.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)

Description

Die Erfindung betrifft ein Verfahren zur Finishbearbeitung von Umfangsflächen an wellenförmigen Werkstücken,

  1. a) wobei das zu bearbeitende Werkstück in einer Aufspannung um die aufgespannte Wellenachse rotierend angetrieben wird,
  2. b) wobei das um die Wellenachse rotierende Werkstück umfangsseitig mit Hilfe eines endlosen, kontinuierlich angetriebenen Schleifbandes bearbeitet wird, welches die zu bearbeitende Umfangsfläche des Werkstückes während der Bearbeitung teilweise umschlingt und in einem durch den Umschlingungswinkel vorgegebenen Bereich flächig am Werkstück anliegt, und
  3. c) wobei der Umschlingungswinkel während der Bearbeitung des Werkstückes verändert wird.
The invention relates to a method for finish machining peripheral surfaces on wave-shaped workpieces,
  1. a) wherein the workpiece to be machined is rotationally driven in a clamping around the clamped shaft axis,
  2. b) wherein the rotating about the shaft axis workpiece is circumferentially processed by means of an endless, continuously driven abrasive belt, which partially wraps around the peripheral surface of the workpiece to be machined during processing and rests in a predetermined by the wrap angle area on the workpiece, and
  3. c) wherein the wrap angle is changed during the machining of the workpiece.

Ein Verfahren zur Finishbearbeitung von Umfangsflächen an wellenförmigen Werkstücken ist aus der Druckschrift US 5,951,377 bekannt. Bei dem bekannten Verfahren besteht während der Werkstückbearbeitung in einer Schnittebene senkrecht zur Wellenachse eine punktförmige Berührung zwischen dem Schleifband und dem Werkstück.A method for finish machining peripheral surfaces on wave-shaped workpieces is known from the document US 5,951,377. In the known method, there is a point contact between the grinding belt and the workpiece during workpiece machining in a cutting plane perpendicular to the shaft axis.

Die US-B-6 220 946 offenbart ein Verfahren mit den eingangs beschriebenen Merkmalen. Bei dem vorbekannten Verfahren wird die Fläche der Anlage des Schleifbandes dadurch hergestellt, dass das Schleifband mittels einer Spannvorrichtung unter Zugspannung gesetzt wird. Durch die auf das Schleifband ausgeübte Zugspannung wird die Andruckkraft, die für die Finishbearbeitung zur Verfügung steht, vorgegeben. Um eine hohe Schnittkraft aufbringen zu können, wird die Verwendung eines Andruckschuhes vorgeschlagen, der außenseitig an das Schleifband angelegt wird. Die Flexibilität dieses vorbekannten Verfahrens ist aufgrund der festgelegten Geometrie des Andruckschuhes begrenzt.US-B-6 220 946 discloses a method with the features described above. In the prior art method, the surface of the abrading belt assembly is made by tensioning the abrasive belt by means of a tensioner. Due to the tensile stress exerted on the sanding belt, the pressing force is used for finish machining is available, given. In order to apply a high cutting force, the use of a pressure shoe is proposed, which is applied to the outside of the sanding belt. The flexibility of this prior art method is limited due to the fixed geometry of the Andruckschuhes.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zur Finishbearbeitung von Umfangsflächen an wellenförmigen Werkstücken anzugeben, mit dem eine hohe Oberflächengüte erzielbar ist und das gleichzeitig eine flexible Werkstückbearbeitung ermöglicht.The invention has for its object to provide a method for finish machining of peripheral surfaces of wavy workpieces, with a high surface quality can be achieved and at the same time allows flexible workpiece machining.

Erfindungsgemäß wird die Aufgabe durch ein Verfahren mit den Merkmalen des Anspruchs 1 gelöst, in dem das Schleifband im Bereich der Werkstückoberfläche von einem endlosen, parallel zum Schleifband gespannten Stützband gestützt wird, wobei das Schleifband und das Stützband gleichgerichtet und mit gleicher Geschwindigkeit bewegt werden. Die Umschlingung des Werkstückes gewährleistet eine große Kontaktfläche mit einer gleichmäßigen Flächenpressung zwischen dem Schleifband und dem Werkstück. Hierdurch ist eine hohe Oberflächengüte erzielbar. Durch die Veränderung des Umschlingungswinkels während der Bearbeitung ist eine flexible Werkstückbearbeitung möglich. So können beispielsweise die Umfangsflächen von gestuften Wellen in eine Aufspannung bearbeitet werden. In diesem Fall werden mehrere Flächen nacheinander mit einem unterschiedlichen Umschlingungswinkel bearbeitet. Alternativ kann auch die Bearbeitung von Wellen mit in Achsrichtung verlaufenden Vertiefungen, wie sie beispielsweise bei Getriebewellen, Zahnwellen oder Kerbzahnwellen vorzufinden sind, mit unterschiedlichen Umschlingungswinkeln durchgeführt werden. In diesem Fall wird dieselbe Umfangsfläche des Werkstückes nacheinander mit unterschiedlichen Umschlingungswinkeln des Schleifbandes bearbeitet. So kann beispielsweise die Oberfläche des zylindrischen Hüllkreises einer Zahnwelle zunächst mit einem kleinen Umschlingungswinkel bearbeitet werden. In einem zweiten Schritt erfolgt dann eine Verrundung der Kanten an den Rändern der Vertiefungen durch Bearbeitung der Werkstückfläche mit einem großen Umschlingungswinkel. Insgesamt wird durch die Variation des Umschlingungswinkels während der Werkstückbearbeitung eine hohe Flexibilität der Werkstückbearbeitung erzielt. Durch das Stützband wird die Zugbeanspruchung des Schleifbandes erheblich reduziert und das Schleifband liegt sehr gleichmäßig mit definierter Andruckkraft an der zu bearbeitenden Werkstückfläche an. Das Stützband kann aus Metall oder aber auch aus einem elastomeren Material bestehen.According to the invention the object is achieved by a method having the features of claim 1, in which the grinding belt is supported in the region of the workpiece surface by an endless, parallel to the sanding belt support belt, wherein the sanding belt and the support belt are rectified and moved at the same speed. The looping of the workpiece ensures a large contact surface with a uniform surface pressure between the grinding belt and the workpiece. As a result, a high surface quality can be achieved. By changing the wrap angle during processing, flexible workpiece machining is possible. For example, the peripheral surfaces of stepped shafts can be machined into one clamping. In this case, several surfaces are processed one after another with a different wrap angle. Alternatively, it is also possible to carry out the machining of shafts with recesses extending in the axial direction, as can be found, for example, in gear shafts, tooth shafts or serrated shafts, with different angles of wrap. In this case, the same peripheral surface of the workpiece is machined sequentially with different wrap angles of the abrasive belt. Thus, for example, the surface of the cylindrical enveloping circle of a toothed shaft can first be machined with a small wrap angle. In a second step, a rounding of the edges at the edges of the Recesses by machining the workpiece surface with a large wrap angle. Overall, a high flexibility of the workpiece machining is achieved by the variation of the wrap angle during workpiece machining. By the support band, the tensile stress of the abrasive belt is significantly reduced and the abrasive belt is very uniform with a defined pressure force on the workpiece surface to be machined. The support band may be made of metal or else of an elastomeric material.

Vorzugsweise wird das Schleifband an einem Werkzeugträger über eine Spanneinrichtung sowie über zwei Umlenkungen, die einen Arbeitsbereich begrenzen, geführt und das Werkstück wird zur Werkstückbearbeitung durch eine Zustellbewegung des Werkzeugträgers und/oder der Werkstückaufspannung mit einem frei gespannten Schleifbandabschnitt zwischen den Umlenkungen in Kontakt gebracht. Der Umschlingungswinkel kann hierbei durch Änderung des Zustellweges von Werkstückträger oder Werkstückaufspannung sowie einer daran angepassten Änderung der Länge des Schleifbandabschnittes verändert werden. Vorzugsweise wird das Schleifband mit einer Bandschlaufe durch einen im Umlaufweg des Schleifbandes angeordneten Bandspeicher geführt und die Länge des Schleifbandabschnittes im Arbeitsbereich mit Hilfe des Bandspeichers gesteuert. Dies erlaubt eine Veränderung des Umschlingungswinkels während der Werkstückbearbeitung innerhalb eines großen Bereiches. Der Umschlingungswinkel kann auch durch eine Relativverstellung der Umlenkungen zueinander verändert werden.Preferably, the grinding belt is guided on a tool carrier via a clamping device and two deflections which limit a working area, and the workpiece is brought to the workpiece processing by a feed movement of the tool carrier and / or the workpiece clamping with a free-loaded abrasive belt section between the deflections in contact. The wrap angle can be changed by changing the feed path of the workpiece carrier or workpiece clamping and an adapted thereto change the length of the grinding belt section. Preferably, the sanding belt is guided with a belt loop through an arranged in the circulation path of the sanding belt tape storage and controlled the length of the sanding belt section in the work area by means of the tape storage. This allows a change in the wrap angle during workpiece machining within a wide range. The wrap angle can also be changed by a relative adjustment of the deflections to each other.

Der Umschlingungswinkel kann in einem Winkelbereich zwischen wenigen Winkelgrad und 270° verändert werden, wobei für viele Anwendungen vorzugsweise ein Umschlingungswinkel von mehr als 180° eingestellt wird.The wrap angle can be changed in an angle range between a few angular degrees and 270 °, wherein for many applications preferably a wrap angle of more than 180 ° is set.

Vorzugsweise wird das Stützband über eine separate Spanneinrichtung geführt und ebenso wie das Schleifband kontinuierlich angetrieben. Hierbei ist ein separater oder ein gemeinsamer Antrieb von Schleifband und Stützband möglich. Vorzugsweise bewegen sich beide Bänder gleichgerichtet mit gleicher Geschwindigkeit, so dass im Kontaktbereich von Schleifband und Stützband praktisch keine Relativbewegung zwischen den beiden Bändern vorliegt.Preferably, the support belt is guided over a separate clamping device and driven continuously as well as the grinding belt. Here is a Separate or a common drive of sanding belt and support belt possible. Preferably, both bands move rectified at the same speed, so that there is virtually no relative movement between the two bands in the contact area of the grinding belt and the support belt.

Im Folgenden wird die Erfindung anhand einer lediglich ein Ausführungsbeispiel darstellenden Zeichnung ausführlich erläutert. Es zeigen schematisch:

Fig. 1a
eine Seitenansicht einer nach dem erfindungsgemäßen Verfahren arbeitenden Vorrichtung zur Finishbearbeitung von Wellen während eines ersten Bearbeitungsschrittes,
Fig. 1b
die Vorrichtung gemäß Fig. 1a während eines zweiten Bearbeitungsschrittes,
Fig. 2a
eine weitere Ausgestaltung der Vorrichtung während eines ersten Bearbeitungsschrittes, ebenfalls in einer Seitenansicht und
Fig. 2b
die Vorrichtung gemäß Fig. 2a während eines zweiten Bearbeitungsschrittes.
In the following the invention will be explained in detail with reference to a drawing showing only one embodiment. They show schematically:
Fig. 1a
a side view of an operating according to the invention apparatus for finishing of waves during a first processing step,
Fig. 1b
the device according to FIG. 1a during a second processing step,
Fig. 2a
a further embodiment of the device during a first processing step, also in a side view and
Fig. 2b
the apparatus of FIG. 2a during a second processing step.

Die Fig. 1a zeigt eine Vorrichtung zur Finishbearbeitung von Umfangsflächen an wellenförmigen Werkstücken. Die Vorrichtung weist einen Werkzeugträger 1, ein endloses Schleifband 2 zur Bearbeitung eines um seine Rotationsachse A rotierenden Werkstückes 3, einen am Werkzeugträger 1 angeordneten Schleifbandantrieb 4, welcher das Schleifband 2 während einer Werkstückbearbeitung kontinuierlich antreibt, und eine Spannvorrichtung 5 für das Schleifband 2 auf. Der Werkzeugträger 1 besitzt einen Bearbeitungskopf 6 mit zwei zueinander beabstandeten Bandumlenkungen 7, die einen Arbeitsbereich L des Bearbeitungskopfes 6 begrenzen. Die Bandumlenkungen 7 sind als Umlenkrollen ausgebildet. Das Schleifband 2 ist über die Umlenkrollen 7 geführt und läuft im Arbeitsbereich L an der zu bearbeitenden Umfangsfläche des Werkstückes 3 vorbei. Der Bearbeitungskopf 6 umgreift die zu bearbeitende Umfangsfläche des Werkstückes 3 gabelförmig so, dass das im Arbeitsbereich L frei gespannte Schleifband 2 das Werkstück 3 teilweise umschlingt und in einem durch den Umschlingungswinkel α vorgegebenen Bereich flächig am Werkstück anliegt. Das in Fig. 1a dargestellte Werkstück 3 ist als gestufte Welle ausgebildet, deren Umfangsflächen nacheinander mit einem unterschiedlichen Umschlingungswinkel α, α' bearbeitet werden. Einer vergleichenden Betrachtung der Fig. 1a und 1b ist zu entnehmen, dass zunächst die kleinere Umfangsfläche der gestuften Welle 3 bei einem kleinen Umschlingungswinkel α bearbeitet wird, während danach eine Bearbeitung der großen Umfangsfläche der gestuften Welle 3 mit einem großen Umschlingungswinkel α' erfolgt. Das Schleifband 2 wird hierbei an dem Werkzeugträger 1 über die Spannvorrichtung 5 sowie über die beiden Umlenkrollen 7, die den Arbeitsbereich L begrenzen, geführt. Das Werkstück 3 wird zur Werkstückbearbeitung durch eine Zustellbewegung des Werkzeugträgers 1 mit einem frei gespannten Schleifbandabschnitt 8 zwischen den beiden Umlenkrollen 7 in Kontakt gebracht. In Abhängigkeit von Zustellhub und zugehörigem Durchmesser der zu bearbeitenden Werkstückfläche liegt während der beiden Bearbeitungsschritte gemäß Fig. 1a und Fig. 1b ein unterschiedlicher Umschlingungswinkel α bzw. α' vor, der auf die Bearbeitung der jeweiligen Werkstückflächen flexibel abgestimmt wird. Der Umschlingungswinkel α bzw. α' wird durch Änderungen des Zustellweges des Werkstückträgers 1 sowie einer daran angepassten Länge des Schleifbandabschnittes 8 verändert. Das Schleifband 2 wird hierbei mit einer Bandschlaufe 9 durch einen im Umlaufweg des Schleifbandes angeordneten Bandspeicher 10 geführt. Die Länge des Schleifbandabschnittes 8 im Arbeitsbereich L wird mit Hilfe des Bandspeichers 10 gesteuert (vgl. Fig. 1a und 1b).Fig. 1a shows a device for finish machining of peripheral surfaces of wavy workpieces. The apparatus comprises a tool carrier 1, an endless grinding belt 2 for processing a workpiece 3 rotating about its axis of rotation A, a grinding belt drive 4 arranged on the tool carrier 1, which continuously drives the grinding belt 2 during workpiece machining, and a clamping device 5 for the grinding belt 2. The tool carrier 1 has a machining head 6 with two mutually spaced band deflections 7, which limit a working area L of the machining head 6. The band deflections 7 are formed as deflection rollers. The grinding belt 2 is guided over the deflection rollers 7 and passes in the working area L past the peripheral surface of the workpiece 3 to be machined. The machining head 6 engages around the peripheral surface of the workpiece 3 to be machined in a fork shape such that the grinding belt 2, which is freely tensioned in the working region L, partially wraps around the workpiece 3 and rests flat against the workpiece in a region predetermined by the wrap angle α. The workpiece 3 shown in Fig. 1a is formed as a stepped shaft, the peripheral surfaces are processed successively with a different wrap angle α, α '. A comparative consideration of Fig. 1a and 1b it can be seen that initially the smaller peripheral surface of the stepped shaft 3 is processed at a small wrap angle α, while then processing the large peripheral surface the stepped shaft 3 with a large wrap angle α 'takes place. The grinding belt 2 is guided on the tool carrier 1 via the tensioning device 5 as well as on the two deflection rollers 7, which delimit the working area L. The workpiece 3 is brought to workpiece machining by a feed movement of the tool carrier 1 with a free-loaded abrasive belt section 8 between the two guide rollers 7 in contact. Depending on the delivery stroke and the associated diameter of the workpiece surface to be machined, a different wrap angle α or α 'is present during the two processing steps according to FIGS. 1a and 1b, which is flexibly adapted to the processing of the respective workpiece surfaces. The wrap angle α or α 'is changed by changes in the feed path of the workpiece carrier 1 and an adapted thereto length of the grinding belt section 8. The abrasive belt 2 is guided here by a belt loop 9 through a belt store 10 arranged in the circulation path of the sanding belt. The length of the abrasive belt section 8 in the work area L is controlled by means of the belt store 10 (see Figures 1a and 1b).

Bei der in den Fig. 1a und 1b dargestellten Vorrichtung wird das Schleifband 2 im Bereich der Werkstückfläche von einem endlosen, parallel zum Schleifband 2 gespannten Stützband 11 gestützt. Hierdurch wird die Zugbeanspruchung des Schleifbandes 2 erheblich reduziert, und das Schleifband 2 liegt sehr gleichmäßig an der Werkstückfläche an. Das Stützband 11 besteht vorzugsweise aus Metall. Es wird über eine separate Spanneinrichtung 12 geführt und ebenso wie das Schleifband 2 kontinuierlich angetrieben. Die Bänder 2, 11 bewegen sich gleichgerichtet mit gleicher Geschwindigkeit, so dass im Bereich der Kontaktfläche zwischen Stützband 11 und Schleifband 2 praktisch keine Relativbewegung zwischen den beiden Bändern 2, 11 vorliegt. Hierdurch wird eine optimale Entlastung des Schleifbandes 2 erzielt.In the apparatus shown in FIGS. 1a and 1b, the grinding belt 2 is supported in the region of the workpiece surface by an endless supporting belt 11, which is tensioned parallel to the grinding belt 2. As a result, the tensile stress of the abrasive belt 2 is significantly reduced, and the abrasive belt 2 is very uniform on the workpiece surface. The support band 11 is preferably made of metal. It is guided over a separate clamping device 12 and driven continuously as well as the grinding belt 2. The bands 2, 11 move rectified at the same speed, so that there is virtually no relative movement between the two bands 2, 11 in the area of the contact surface between the support belt 11 and the sanding belt 2. As a result, an optimal discharge of the abrasive belt 2 is achieved.

Die Fig. 2a und 2b zeigen eine Oberflächenbearbeitung einer Zahnwelle 3 mit in Achsrichtung A verlaufenden Vertiefungen 13. In einem in Fig. 2a dargestellten ersten Bearbeitungsschritt erfolgt eine Bearbeitung der Oberfläche des zylindrischen Hüllkreises 14 der Zahnwelle 3 bei einem kleinen Umschlingungswinkel β. Zur Verrundung der Kanten 15 an den Rändern der Vertiefungen 13 erfolgt anschließend in einem zweiten Bearbeitungsschritt eine Finishbearbeitung mit großem Umschlingungswinkel β' (siehe Fig. 2b). Die Fig. 1a bis 2b zeigen, dass durch die Veränderung des Umschlingungswinkels eine flexible Werkstückbearbeitung ermöglicht wird. Bei der in den Fig. 2a und 2b dargestellten Vorrichtung wird der Umschlingungswinkel β, β' durch eine Relativverstellung der Umlenkrollen 7 zueinander verändert. Der Bearbeitungskopf 6 weist hierzu verschwenkbare Gabelarme 16 auf, an denen die Umlenkrollen 7 angeordnet sind. Mit dieser Vorrichtung lassen sich auch Umschlingungswinkel von mehr als 180° einstellen, wie der Fig. 2b unmittelbar zu entnehmen ist. Bei der in den Fig. 2a und 2b dargestellten Vorrichtung übernimmt die Spannvorrichtung 5 des Schleifbandes 2 gleichzeitig die Funktion eines Bandspeichers.2a and 2b show a surface processing of a toothed shaft 3 with recesses 13 running in the axial direction A. In a first processing step shown in FIG. 2a, the surface of the cylindrical enveloping circle 14 of the toothed shaft 3 is machined at a small wrap angle β. To round off the edges 15 at the edges of the depressions 13, a finish machining with a large wrap angle β '(see FIG. 2b) is then carried out in a second processing step. FIGS. 1a to 2b show that a flexible workpiece machining is made possible by the change of the wrap angle. In the device shown in Figs. 2a and 2b, the wrap angle β, β 'by a relative displacement of the guide rollers 7 to each other changed. The machining head 6 has for this purpose pivotable fork arms 16 on which the deflection rollers 7 are arranged. With this device, wrap angles of more than 180 ° can also be set, as can be seen directly from FIG. 2b. In the device shown in FIGS. 2a and 2b, the tensioning device 5 of the sanding belt 2 simultaneously assumes the function of a belt store.

Claims (8)

  1. Method for the finish machining of circumferential surfaces on shaft-like workpieces,
    a) wherein the workpiece (3) to be machined is driven in rotation in a clamp about the shaft axis (A),
    b) wherein the workpiece (3) rotating about the shaft axis (A) is machined on the circumference by means of an endless, continuously driven grinding belt (2) which during the machining operation partially wraps around the circumferential surface to be machined on the workpiece (3) and bears flat against the workpiece (3) in an area predefined by the wraparound angle (α, α', β, β'), and
    c) wherein the wraparound angle (α, α', β, β') is changed during the machining of the workpiece (3),
    characterised in that the grinding belt (2) is supported in the region of the workpiece surface by an endless support belt (11) parallel to the grinding belt (2), wherein the grinding belt (2) and the support belt (11) are moved in the same direction and at the same speed.
  2. Method according to claim 1, characterised in that the grinding belt (2) is guided on a tool carrier (1) over a tensioning device (5) and also over two deflectors (7) which delimit a working area (L), and in that the workpiece (3) is brought into contact with a free grinding belt section (8) between the deflectors (7) by a forward movement of the tool carrier (1) and/or the workpiece clamp in order to machine the workpiece.
  3. Method according to claim 2, characterised in that the wraparound angle (α, α', β, β') is changed by changing the forward travel of the tool carrier (1) or of the workpiece clamp and by a corresponding change in length of the grinding belt section (8).
  4. Method according to claim 2 or 3, characterised in that the grinding belt (2) is guided with a belt loop (9) through a belt take-up device (10) arranged in the rotational path of the grinding belt (2), and in that the length (L) of the grinding belt section (8) in the working area is controlled by means of the belt take-up device (10).
  5. Method according to one of claims 2 to 4, characterised in that the wraparound angle (α, α', β, β') is changed by means of a relative movement of the deflectors (7) with respect to one another.
  6. Method according to one of claims 1 to 5, characterised in that the wraparound angle (α, α', β, β') is changed in an angle range of up to 270°.
  7. Method according to claim 6, characterised in that, during machining of the workpiece, a wraparound angle (α, α', β, β') of more than 180° is set.
  8. Method according to claim 1, characterised in that the support belt (11) is guided over a separate tensioning device (12) and is driven continuously like the grinding belt (2).
EP20040020484 2003-09-12 2004-08-28 Process for finishing the surface of revoluton of shafts Active EP1514643B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10342139 2003-09-12
DE2003142139 DE10342139B4 (en) 2003-09-12 2003-09-12 Process for finishing peripheral surfaces on wave-shaped workpieces

Publications (2)

Publication Number Publication Date
EP1514643A1 EP1514643A1 (en) 2005-03-16
EP1514643B1 true EP1514643B1 (en) 2007-05-02

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Family Applications (1)

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EP20040020484 Active EP1514643B1 (en) 2003-09-12 2004-08-28 Process for finishing the surface of revoluton of shafts

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DE (2) DE10342139B4 (en)

Cited By (3)

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Publication number Priority date Publication date Assignee Title
WO2012065949A1 (en) 2010-11-17 2012-05-24 Nagel Maschinen- Und Werkzeugfabrik Gmbh Method and device for finish machining curved workpiece surfaces on workpieces by means of a finish belt
DE102011081918A1 (en) 2011-08-31 2013-02-28 Nagel Maschinen- Und Werkzeugfabrik Gmbh Finishing machine for finishing curved workpiece surfaces on workpieces
CN108818238A (en) * 2018-04-30 2018-11-16 陈五二 Surface wire drawing process device

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DE102006052829A1 (en) 2006-11-09 2008-05-15 Thielenhaus Technologies Gmbh Method for strip finishing of workpiece peripheral surfaces
DE102007051047B4 (en) 2007-10-16 2023-03-23 Nagel Maschinen- Und Werkzeugfabrik Gmbh Press-on device for finishing belt and device and method for finishing peripheral surfaces on cylindrical workpiece sections
DE102014213194A1 (en) * 2014-07-08 2016-01-28 Supfina Grieshaber Gmbh & Co. Kg Pressing device for pressing a Finisbands against a workpiece surface
CN111673590A (en) * 2020-06-03 2020-09-18 大连富地重工机械制造有限公司 Grinding device for grinding slender materials
CN115056098B (en) * 2022-07-05 2023-12-08 安徽康宏精密制造有限公司 Polishing equipment and method for small hardware fittings

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DE1652032B1 (en) * 1967-03-22 1970-08-20 Ernst Maschf Gmbh Paul Device for grinding by means of an endless grinding belt
JPH02205471A (en) * 1989-02-01 1990-08-15 Babcock Hitachi Kk Cleaning device for pipe surface
US5628678A (en) * 1996-05-03 1997-05-13 Tridico; Frank Shaft sanding device
US5951377A (en) * 1996-08-01 1999-09-14 Radtec, Inc. Microfinishing machine
US6220946B1 (en) * 1998-02-13 2001-04-24 Philip D. Arnold Active polishing of rotatable article surfaces
FR2808463B1 (en) * 2000-05-04 2002-09-13 Procedes Et Machines Speciales ABRASIVE TAPE MACHINE FOR CYLINDRICAL DOORS ON PARTS
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012065949A1 (en) 2010-11-17 2012-05-24 Nagel Maschinen- Und Werkzeugfabrik Gmbh Method and device for finish machining curved workpiece surfaces on workpieces by means of a finish belt
DE102010052311A1 (en) 2010-11-17 2012-05-24 Nagel Maschinen- Und Werkzeugfabrik Gmbh Method and device for finishing curved workpiece surfaces on workpieces by means of finishing tape
DE102011081918A1 (en) 2011-08-31 2013-02-28 Nagel Maschinen- Und Werkzeugfabrik Gmbh Finishing machine for finishing curved workpiece surfaces on workpieces
WO2013030194A1 (en) 2011-08-31 2013-03-07 Nagel Maschinen- Und Werkzeugfabrik Gmbh Finishing machine for finish machining of curved workpiece surfaces on workpieces
CN108818238A (en) * 2018-04-30 2018-11-16 陈五二 Surface wire drawing process device

Also Published As

Publication number Publication date
DE10342139A1 (en) 2005-04-07
EP1514643A1 (en) 2005-03-16
DE502004003665D1 (en) 2007-06-14
DE10342139B4 (en) 2008-06-19

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