EP1518643B1 - Finishing apparatus - Google Patents

Finishing apparatus Download PDF

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Publication number
EP1518643B1
EP1518643B1 EP03400054A EP03400054A EP1518643B1 EP 1518643 B1 EP1518643 B1 EP 1518643B1 EP 03400054 A EP03400054 A EP 03400054A EP 03400054 A EP03400054 A EP 03400054A EP 1518643 B1 EP1518643 B1 EP 1518643B1
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EP
European Patent Office
Prior art keywords
finishing
finishing belt
work piece
belt
contact
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.)
Expired - Lifetime
Application number
EP03400054A
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German (de)
French (fr)
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EP1518643A1 (en
Inventor
Hildebrandt Oliver
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Supfina Grieshaber GmbH and Co KG
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Supfina Grieshaber GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Supfina Grieshaber GmbH and Co KG filed Critical Supfina Grieshaber GmbH and Co KG
Priority to AT03400054T priority Critical patent/ATE447461T1/en
Priority to EP03400054A priority patent/EP1518643B1/en
Priority to DE50312089T priority patent/DE50312089D1/en
Publication of EP1518643A1 publication Critical patent/EP1518643A1/en
Application granted granted Critical
Publication of EP1518643B1 publication Critical patent/EP1518643B1/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
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/36—Single-purpose machines or devices
    • B24B5/42—Single-purpose machines or devices for grinding crankshafts or crankpins
    • 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
    • B24B21/004—Machines or devices using grinding or polishing belts; Accessories therefor using abrasive rolled strips

Definitions

  • the description relates to a finishing device for a superfinishing machine, with a finishing belt, which can be driven in the longitudinal direction and can be applied with a contact area to a workpiece to be machined.
  • a finishing device for a superfinishing machine, with a finishing belt, which can be driven in the longitudinal direction and can be applied with a contact area to a workpiece to be machined.
  • Such a device is eg from the DE-U-298 19 443 known.
  • Finishing machines are known from the prior art, with which the finishing tape can be applied flat to a workpiece.
  • the movement of the workpiece resting against the finishing belt can be superimposed by oscillating movements of the finishing belt and / or of the workpiece in order to be able to achieve the highest surface qualities.
  • the workpieces to be machined are, for example, components such as gear shafts, camshafts, crankshafts or the like.
  • bearings or bearings sealed bearings or the like are processed.
  • the shafts may have balance weights, so-called cheeks, which may be arranged adjacent to a bearing point.
  • cheeks which may be arranged adjacent to a bearing point.
  • the bearing surfaces on their lateral boundaries which may for example adjoin a cheek, a transition section, which may be formed, for example, as a radius.
  • the mentioned components such as camshafts or crankshafts
  • compact that is build as short as possible.
  • the transition between a bearing surface and a cheek can not be formed without undesirable geometry changes.
  • the transition region may be notched, creating undesirable notches that are problematic for strength or fatigue life, particularly a compact crankshaft.
  • the transition region can be increased relative to an adjacent bearing surface, so that the bearing surface is reduced in width. Again, this is not desirable because the largest possible storage space is needed to transfer forces.
  • a finishing device for a superfinishing machine equipped with a finishing belt, which can be applied in the longitudinal direction and with a contact area to a workpiece to be machined, the finishing belt has a curvature in its contact area about an axis extending in the longitudinal direction of the finishing tape and the finishing belt is arranged between the axis and the workpiece, a finishing tape guide is provided, which changes the curvature of the finishing tape about the longitudinal axis, the finishing tape guide has a finish belt entry, with a workpiece approaching portion of the finishing tape from a non-curved to a curved state can be converted, the workpiece is driven in rotation, the contact area has a first, parallel to the axis of rotation of the workpiece extending portion and a curved, second portion, whose perpendicular oblique to the axis of rotation run se, the first portion can be applied to a bearing surface to be machined on the workpiece.
  • the finishing belt is also curved so that the cutting side is located on the inside of the bend.
  • the GB-A-2 269 553 shows a device for grinding crankshafts, in which the grinding belt is guided over a plurality of rollers to bring it into the desired shape.
  • the present invention seeks to provide a finishing device, with the transitions can be produced easily without rugged geometry change.
  • the finishing belt is curved or has a longitudinal axis a curvature on. Because the finishing belt is disposed between the axle and the workpiece, the finishing belt can conform to the geometry of the workpiece and, in particular, machine transition areas to be formed on the workpiece, which transition area can smoothly pass into adjacent areas of the workpiece without creating nicks. The fact that the finishing belt is curved the same way in the finishing belt inlet and on the workpiece, it can optimally cling to the workpiece.
  • workpiece is driven in rotation. This can be high along the entire circumference of a workpiece Surface qualities, especially in the transition areas are produced.
  • the abutment region of the finishing strip has a first, parallel to the axis of rotation of the workpiece extending, and a curved, second portion, whose perpendicular oblique to the axis of rotation.
  • the machining of a bearing surface, for example a crankshaft, and a transition region adjoining the bearing surface can take place simultaneously.
  • the contact area of the finishing strip is adapted to the contour of the workpiece.
  • the curvature of the finishing strip changes around the longitudinal axis.
  • a complementary system of the finishing strip is supported with its investment area to different partial surfaces of the workpiece.
  • finishing belt enema provided, with which a workpiece to be brought to the workpiece section of the finishing strip from an unbending to a curved state can be transferred.
  • the finishing tape is stored on a supply roll on which it is in an uncurved condition is wound up. With the help of the finish belt inlet, the finishing belt can then be converted into a curved state.
  • the finishing belt is preferably curved complementary to the contour of the workpiece.
  • high surface qualities can be achieved in transition areas and adjacent areas of the workpiece.
  • the finishing tape can also be curved several times around the longitudinal axis. This is the case, for example, when a bearing surface to be machined adjoins, with its opposite sides, two transition regions, which in turn can be arranged adjacent to a cheek surface.
  • the finishing tape can then be curved in both the first and in the second transition region, so that the most gentle transitions between the radii and the bearing surface can be formed.
  • the radii of curvature of the portions of the finishing tape can also differ from each other.
  • the finishing belt guide may have a finishing belt outlet, with which a portion of the finishing belt to be removed from the workpiece can be converted from a curved to an un-curved state.
  • the finishing belt which has a curvature in its contact area, can again be converted into an un-curved state and fed to a take-up reel.
  • the finishing band guide has hollow cylindrical guide surfaces which surround the finishing band at least in sections.
  • the course of the finishing strip can be influenced and, on the other hand, the curvature of the finishing strip can be changed. Due to the hollow cylindrical design, the finishing belt is guided particularly reliable.
  • a contact element is provided which presses the contact area of the finishing strip against the workpiece.
  • the contact element is designed to be complementary to the contour of the workpiece.
  • the finishing belt can be aligned particularly well relative to the partial surfaces formed on the workpiece, at the same time a good material removal can be achieved.
  • a development of the invention provides that the abutment region of the finishing strip wraps around the workpiece in sections.
  • the wrap can, for example, 2 ° to 40 °, in particular 30 °, amount.
  • the wrap can also caused by elastic deformation of the contact element and the band.
  • the contact element does not necessarily have to be preformed. It should be noted that a small wrap angle facilitates the curvature of the finish strip about the axis extending in the longitudinal direction of the finish strip. The smaller the angle of contact, the better the absence of tension of the lateral edge regions of the finishing tape is guaranteed. It is also conceivable that one wrapping angle is finished.
  • drive means can be provided with which the finishing belt can be driven to oscillate transversely to its longitudinal direction.
  • the workpiece can be driven to oscillate transversely to the longitudinal direction of the finishing belt.
  • FIG. 1 shows a generally designated 10 processing tongs of a microfinishing machine, not shown, wherein the processing tongs 10 has two processing arms 12 and 14 which are pivotally mounted about pivot bearings 16 and 18 so that their free ends 20 and 22 in the direction of a workpiece 24 and away from this are pivotable.
  • the machining arms 12 and 14 are hydraulically, pneumatically or mechanically driven as known in the art.
  • FIG. 1 is denoted by the reference numeral 26, a finishing belt, which is subtracted from a supply roll, not shown in the direction of arrow 28, deflected by a guide roller 30 and a finishing device 32 is fed. From this, the finishing belt 26 reaches an additional guide 34 and finally to a take-up reel, not shown.
  • the machining of shaft seats should be done with two finishing devices 32.
  • a holding bracket 36 is attached to which a bezel 38 is integrally formed.
  • This bezel 38 serves to receive an insert 40, in which two abutment pieces 42 are arranged, which bear against the workpiece 24.
  • the bezel 38 is needed due to the centrifugal forces only in the processing of crank bearings of a crankshaft.
  • FIG. 2 the finishing device 32 is shown enlarged.
  • a holding bracket 44 by means of two screws 46 and 48 is attached.
  • finish belt inlet is secured by means of a fastening screw 52.
  • the finish belt inlet 50 has an outwardly rounded starting element 54 for the finishing belt 26 fed by the deflection roller 30.
  • the start-up element 54 aligns the finishing belt relative to a hollow-cylindrical guide surface 56 formed in the finish belt inlet 50. By the guide surface 56, the finishing belt 26 is transferred from an unbent to a curved state.
  • the finishing belt 26 rests against the workpiece 24 with a contact region 62 and wraps it around within a small angle of wrap 64.
  • the holding bracket 44 and the bearing element 60 are made in one piece.
  • finishing belt 26 is fed to a hollow cylindrical guide surface 66, which is provided in a finishing belt outlet 68. Following this, the finishing belt 26 passes a deflecting element 70 before it is fed to the additional guide 34 and the take-up reel, not shown.
  • FIG. 3 a portion of the finish belt inlet 50 is shown.
  • the already mentioned hollow cylindrical guide surface 56 is formed.
  • deflection roller 30 is still uncurved finishing belt is transferred by the guide surface 56 in a curved state and then passes with its abutment portion 62 in contact with the workpiece 24th
  • the finishing belt 26 is repeatedly curved about an axis 72 extending in the longitudinal direction of the finishing belt 26, which runs perpendicular to a rotation axis 74 of the workpiece 24.
  • the finishing belt 26 has a first portion 76 with which it is in contact with a bearing surface formed on the workpiece 24. Adjacent to the first partial region 76, the finishing belt 26 has curved, second partial regions 80, the curvature of the finishing belt in these partial regions corresponding to radii 82 to be machined on the workpiece 24. Adjacent to the radii 82 cheeks 84 are formed on the workpiece 24.
  • the radii 82 can be transferred seamlessly into the bearing surface 78 or into the area of go over the cheeks 84 trained areas.
  • the bearing surface 78 can be formed as wide as possible and on the other hand can be avoided that the radii 82 form notches for the workpiece 24.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)

Abstract

A surface fine finishing tool (10) has a finishing belt (26) that advances longitudinally to a presentation zone (62) where it makes contact with a work piece (26). In the contact zone the finishing belt moves around a convex surface.

Description

Die Beschreibung betrifft eine Finishvorrichtung für eine Feinstbearbeitungsmaschine, mit einem Finishband, welches in Längsrichtung antreibbar und mit einem Anlagebereich an ein zu bearbeitendes Werkstück anlegbar ist. Solch eine Vorrichtung ist z.B. aus der DE-U-298 19 443 bekannt.The description relates to a finishing device for a superfinishing machine, with a finishing belt, which can be driven in the longitudinal direction and can be applied with a contact area to a workpiece to be machined. Such a device is eg from the DE-U-298 19 443 known.

Aus dem Stand der Technik sind Feinstbearbeitungsmaschinen bekannt, mit denen das Finishband flächig an ein Werkstück anlegbar ist. Der Bewegung des am Finishband anliegenden Werkstücks können oszillierende Bewegungen des Finishbands und/oder des Werkstücks überlagert werden, um höchste Oberflächenqualitäten erzielen zu können.Finishing machines are known from the prior art, with which the finishing tape can be applied flat to a workpiece. The movement of the workpiece resting against the finishing belt can be superimposed by oscillating movements of the finishing belt and / or of the workpiece in order to be able to achieve the highest surface qualities.

Bei den zu bearbeitenden Werkstücken handelt es sich beispielsweise um Bauteile, wie Getriebewellen, Nockenwellen, Kurbelwellen oder dergleichen. An diesen Wellen werden Lagerstellen oder auch Lager, Dichtlagerungen oder dergleichen bearbeitet. Die Wellen können Ausgleichsgewichte, sogenannte Wangen, aufweisen, die benachbart zu einer Lagerstelle angeordnet sein können. Üblicherweise weisen die Lagerflächen an ihren seitlichen Berandungen, die beispielsweise an eine Wange angrenzen können, einen Übergangsabschnitt auf, der beispielsweise als Radius ausgebildet sein kann.The workpieces to be machined are, for example, components such as gear shafts, camshafts, crankshafts or the like. On these shafts bearings or bearings, sealed bearings or the like are processed. The shafts may have balance weights, so-called cheeks, which may be arranged adjacent to a bearing point. Usually, the bearing surfaces on their lateral boundaries, which may for example adjoin a cheek, a transition section, which may be formed, for example, as a radius.

Um Motoren für Kraftfahrzeuge mit besonders kompakten Außenabmessungen konstruieren zu können, müssen auch die genannten Bauteile, wie Nockenwellen oder Kurbelwellen, kompakt, das heißt möglichst kurz bauen. Insbesondere bei Motoren mit einer hohen Zylinderanzahl stellt sich dann das Problem, dass nur wenig Material für einen Übergangsbereich zwischen einer Lagerfläche und einer angrenzenden Wange zur Verfügung steht. Mit den bisher bekannten Feinstbearbeitungsmaschinen kann der Übergang zwischen einer Lagerfläche und einer Wange nicht ohne unerwünschte Geometriewechsel ausgebildet werden. So kann der Übergangsbereich eingekerbt sein, wodurch unerwünschte Kerbstellen geschaffen werden, die für die Festigkeit oder Dauerfestigkeit, insbesondere einer kompakten Kurbelwelle, problematisch sind. Andererseits kann der Übergangsbereich gegenüber einer benachbarten Lagerfläche erhöht sein, so dass die Lagerfläche in ihrer Breite reduziert ist. Auch dies ist nicht erwünscht, da zur Übertragung von Kräften eine möglichst große Lagerfläche benötigt wird.In order to construct engines for motor vehicles with particularly compact external dimensions, the mentioned components, such as camshafts or crankshafts, compact, that is build as short as possible. In particular, in engines with a high number of cylinders then raises the problem that only a small amount of material is available for a transition region between a storage area and an adjacent cheek. With the previously known superfinishing machines, the transition between a bearing surface and a cheek can not be formed without undesirable geometry changes. Thus, the transition region may be notched, creating undesirable notches that are problematic for strength or fatigue life, particularly a compact crankshaft. On the other hand, the transition region can be increased relative to an adjacent bearing surface, so that the bearing surface is reduced in width. Again, this is not desirable because the largest possible storage space is needed to transfer forces.

Aus der DE-U-298 19 443 ist eine Finishvorrichtung für eine Feinstbearbeitungsmaschine bekannt geworden, mit einem Finishband ausgerüstet, welches in Längsrichtung antreibbar und mit einem Anlagebereich an ein zu bearbeitendes Werkstück anlegbar ist, wobei das Finishband in seinem Anlagebereich um eine in Längsrichtung des Finishbands verlaufende Achse eine Krümmung aufweist und das Finishband zwischen der Achse und dem Werkstück angeordnet ist, eine Finishbandführung vorgesehen ist, die die Krümmung des Finishbands um die in Längsrichtung verlaufende Achse ändert, die Finishbandführung einen Finishbandeinlauf aufweist, mit dem ein an das Werkstück heranzuführender Abschnitt des Finishbands aus einem ungekrümmten in einen gekrümmten Zustand überführbar ist, das Werkstück rotierend antreibbar ist, der Anlagebereich einen ersten, parallel zur Rotationsachse des Werkstücks verlaufenden Teilbereich und einen gekrümmten, zweiten Teilbereich aufweist, dessen Senkrechten schräg zur Rotationsachse verlaufen, der erste Teilbereich an einer am Werkstück zu bearbeitenden Lagerfläche anlegbar ist.From the DE-U-298 19 443 a finishing device for a superfinishing machine is known, equipped with a finishing belt, which can be applied in the longitudinal direction and with a contact area to a workpiece to be machined, the finishing belt has a curvature in its contact area about an axis extending in the longitudinal direction of the finishing tape and the finishing belt is arranged between the axis and the workpiece, a finishing tape guide is provided, which changes the curvature of the finishing tape about the longitudinal axis, the finishing tape guide has a finish belt entry, with a workpiece approaching portion of the finishing tape from a non-curved to a curved state can be converted, the workpiece is driven in rotation, the contact area has a first, parallel to the axis of rotation of the workpiece extending portion and a curved, second portion, whose perpendicular oblique to the axis of rotation run se, the first portion can be applied to a bearing surface to be machined on the workpiece.

Aus der US-A-20010041523 ist eine Vorrichtung zum Schleifen von balligen Lagerflächen bekannt geworden. Dabei wird das Finishband ebenfalls so gekrümmt, dass die Schneidseite auf der Krümmungsinnenseite liegt. Die GB-A-2 269 553 zeigt eine Vorrichtung zum Schleifen von Kurbelwellen, bei der das Schleifband über eine Vielzahl von Rollen geführt wird, um es in die gewünschte Form zu bringen.From the US-A-20010041523 a device for grinding spherical bearing surfaces has become known. The finishing belt is also curved so that the cutting side is located on the inside of the bend. The GB-A-2 269 553 shows a device for grinding crankshafts, in which the grinding belt is guided over a plurality of rollers to bring it into the desired shape.

Hiervon ausgehend liegt der Erfindung die Aufgabe zugrunde, eine Finishvorrichtung zu schaffen, mit der auf einfache Weise Übergänge ohne schroffe Geometriewechsel herstellbar sind.Proceeding from this, the present invention seeks to provide a finishing device, with the transitions can be produced easily without rugged geometry change.

Diese Aufgabe wird mit einer Finishvorrichtung gelöst, die die Merkmale des Anspruchs 1 aufweist.This object is achieved with a finishing device having the features of claim 1.

Im Unterschied zum Stand der Technik, bei dem ein Finishband um eine quer zur Längsrichtung des Finishbands verlaufende Achse gekrümmt ist, so dass das Werkstück teilweise von dem Finishband umschlungen ist, ist bei der erfindungsgemäßen Finishvorrichtung das Finishband um eine in Längsrichtung verlaufende Achse gekrümmt oder weist eine Krümmung auf. Da das Finishband zwischen der Achse und dem Werkstück angeordnet ist, kann sich das Finishband der Geometrie des Werkstücks anpassen und insbesondere am Werkstück auszubildende Übergangsbereiche bearbeiten, wobei dieser Übergangsbereich fließend in benachbarte Bereiche des Werkstücks übergehen kann, ohne dass Kerben gebildet werden. Dadurch dass das Finishband im Finishbandeinlauf und an Werkstück gleich gekrümmt ist, kann es sich optimal an das Werkstück anschmiegen.In contrast to the prior art, in which a finishing belt is curved about an axis extending transversely to the longitudinal direction of the finishing belt so that the workpiece is partially wrapped by the finishing belt, in the finishing device according to the invention the finishing belt is curved or has a longitudinal axis a curvature on. Because the finishing belt is disposed between the axle and the workpiece, the finishing belt can conform to the geometry of the workpiece and, in particular, machine transition areas to be formed on the workpiece, which transition area can smoothly pass into adjacent areas of the workpiece without creating nicks. The fact that the finishing belt is curved the same way in the finishing belt inlet and on the workpiece, it can optimally cling to the workpiece.

Erfindungsgemäß ist Werkstück rotierend antreibbar. Hierdurch können entlang des gesamten Umfangs eines Werkstücks hohe Oberflächenqualitäten, insbesondere in den Übergangsbereichen, hergestellt werden.According to the invention workpiece is driven in rotation. This can be high along the entire circumference of a workpiece Surface qualities, especially in the transition areas are produced.

Der Anlagebereich des Finishbands weist einen ersten, parallel zur Rotationsachse des Werkstücks verlaufenden, und einen gekrümmten, zweiten Teilbereich auf, dessen Senkrechten schräg zur Rotationsachse verlaufen. Auf diese Weise kann gleichzeitig die Bearbeitung einer Lagerfläche, beispielsweise einer Kurbelwelle, und eines an die Lagerfläche angrenzenden Übergangsbereichs erfolgen. Dies ist insbesondere dann vorteilhaft, wenn die Krümmung des zweiten Teilbereiches gleich einem an dem Werkstück auszubildenden Radius ist. Somit ist der Anlagebereich des Finishbands der Kontur des Werkstücks angepasst. Durch den in zwei Teilbereiche ausgebildeten Kontakt des Anlagebereichs des Finishbands mit dem Werkstück können gleichzeitig Lagerflächen und Radien bearbeitet werden.The abutment region of the finishing strip has a first, parallel to the axis of rotation of the workpiece extending, and a curved, second portion, whose perpendicular oblique to the axis of rotation. In this way, the machining of a bearing surface, for example a crankshaft, and a transition region adjoining the bearing surface can take place simultaneously. This is particularly advantageous when the curvature of the second portion is equal to a radius to be formed on the workpiece. Thus, the contact area of the finishing strip is adapted to the contour of the workpiece. By trained in two sub-areas contact of the contact area of the finishing strip with the workpiece bearing surfaces and radii can be edited simultaneously.

Erfindungsgemäß ist vorgesehen, dass die Krümmung des Finishbands um die in Längsrichtung verlaufende Achse ändert. Somit wird eine komplementäre Anlage des Finishbands mit seinem Anlagebereich an unterschiedliche Teilflächen des Werkstücks unterstützt.According to the invention, it is provided that the curvature of the finishing strip changes around the longitudinal axis. Thus, a complementary system of the finishing strip is supported with its investment area to different partial surfaces of the workpiece.

Es ist ein Finishbandeinlauf vorgesehen, mit dem ein an das Werkstück heranzuführender Abschnitt des Finishbands aus einem ungekrümmten in einen gekrümmten Zustand überführbar ist. Üblicherweise ist das Finishband auf einer Vorratsrolle bevorratet, auf der es in einem ungekrümmten Zustand aufgewickelt ist. Mit Hilfe des Finishbandeinlaufs kann das Finishband dann in einen gekrümmten Zustand überführt werden.It is a finishing belt enema provided, with which a workpiece to be brought to the workpiece section of the finishing strip from an unbending to a curved state can be transferred. Usually, the finishing tape is stored on a supply roll on which it is in an uncurved condition is wound up. With the help of the finish belt inlet, the finishing belt can then be converted into a curved state.

Das Finishband ist vorzugsweise komplementär zur Kontur des Werkstücks gekrümmt. Somit können in Übergangsbereichen und dazu benachbarten Bereichen des Werkstücks hohe Oberflächenqualitäten erzielt werden.The finishing belt is preferably curved complementary to the contour of the workpiece. Thus, high surface qualities can be achieved in transition areas and adjacent areas of the workpiece.

Das Finishband kann um die in Längsrichtung verlaufende Achse auch mehrfach gekrümmt sein. Dies ist beispielsweise dann der Fall, wenn eine zu bearbeitende Lagerfläche mit ihren gegenüberliegen Seiten an zwei Übergangsbereiche angrenzt, die ihrerseits benachbart zu einer Wangenfläche angeordnet sein können. Das Finishband kann dann sowohl in dem ersten als auch in dem zweiten Übergangsbereich gekrümmt sein, so dass möglichst sanfte Übergänge zwischen den Radien und der Lagerfläche ausgebildet werden können. Dabei können die Krümmungsradien der Teilbereiche des Finishbands auch voneinander abweichen.The finishing tape can also be curved several times around the longitudinal axis. This is the case, for example, when a bearing surface to be machined adjoins, with its opposite sides, two transition regions, which in turn can be arranged adjacent to a cheek surface. The finishing tape can then be curved in both the first and in the second transition region, so that the most gentle transitions between the radii and the bearing surface can be formed. The radii of curvature of the portions of the finishing tape can also differ from each other.

Entsprechend kann die Finishbandführung einen Finishbandauslauf aufweisen, mit dem ein von dem Werkstück wegzuführender Abschnitt des Finishbands aus einem gekrümmten in einen ungekrümmten Zustand überführbar ist. Auf diese Weise kann das Finishband, das in seinem Anlagebereich eine Krümmung aufweist, wieder in einen ungekrümmten Zustand überführt und einer Aufwickelrolle zugeführt werden.Accordingly, the finishing belt guide may have a finishing belt outlet, with which a portion of the finishing belt to be removed from the workpiece can be converted from a curved to an un-curved state. In this way, the finishing belt, which has a curvature in its contact area, can again be converted into an un-curved state and fed to a take-up reel.

Erfindungsgemäß weist die Finishbandführung hohlzylindrische Führungsflächen auf, die das Finishband zumindest abschnittsweise umgeben. Somit kann einerseits der Verlauf des Finishbands beeinflusst werden und andererseits die Krümmung des Finishbands verändert werden. Durch die hohlzylindrische Ausgestaltung wird das Finishband besonders zuverlässig geführt.According to the invention, the finishing band guide has hollow cylindrical guide surfaces which surround the finishing band at least in sections. Thus, on the one hand, the course of the finishing strip can be influenced and, on the other hand, the curvature of the finishing strip can be changed. Due to the hollow cylindrical design, the finishing belt is guided particularly reliable.

Bei einem bevorzugten Ausführungsbeispiel ist ein Kontaktelement vorgesehen, das den Anlagebereich des Finishbands gegen das Werkstück drückt. Durch diese Maßnahme kann der Materialabtrag erhöht werden, so dass die Fertigungszeiten verkürzt werden können.In a preferred embodiment, a contact element is provided which presses the contact area of the finishing strip against the workpiece. By this measure, the removal of material can be increased, so that the production times can be shortened.

Vorteilhafterweise ist das Kontaktelement komplementär zur Kontur des Werkstücks ausgebildet. Hierdurch kann das Finishband besonders gut relativ zu am Werkstück ausgebildeten Teilflächen ausgerichtet werden, wobei gleichzeitig ein guter Materialabtrag erzielbar ist.Advantageously, the contact element is designed to be complementary to the contour of the workpiece. In this way, the finishing belt can be aligned particularly well relative to the partial surfaces formed on the workpiece, at the same time a good material removal can be achieved.

Eine Weiterbildung der Erfindung sieht vor, dass der Anlagebereich des Finishbands das Werkstück abschnittsweise umschlingt. Der Umschlingungswickel kann beispielweise 2° bis 40°, insbesondere 30°, betragen. Die Umschlingung kann auch durch elastische Verformung des Kontaktelements und des Bandes entstehen. Das Kontaktelement muss nicht unbedingt vorgeformt sein. Zu beachten ist, dass ein kleiner Umschlingungswinkel die Krümmbarkeit des Finishbands um die in Längsrichtung des Finishbands verlaufende Achse erleichtert. Je kleiner der Umschlingungswinkel ist, desto besser ist eine Spannungsfreiheit der seitlichen Randbereiche des Finishbands gewährleistet. Denkbar ist auch, dass one Umschlingungswinkel gefinisht wird.A development of the invention provides that the abutment region of the finishing strip wraps around the workpiece in sections. The wrap can, for example, 2 ° to 40 °, in particular 30 °, amount. The wrap can also caused by elastic deformation of the contact element and the band. The contact element does not necessarily have to be preformed. It should be noted that a small wrap angle facilitates the curvature of the finish strip about the axis extending in the longitudinal direction of the finish strip. The smaller the angle of contact, the better the absence of tension of the lateral edge regions of the finishing tape is guaranteed. It is also conceivable that one wrapping angle is finished.

Es können weiterhin Antriebsmittel vorgesehen sein, mit denen das Finishband quer zu seiner Längsrichtung oszillierend antreibbar ist. Alternativ oder zusätzlich kann auch das Werkstück quer zur Längsrichtung des Finishbands oszillierend antreibbar sein. Durch diese Maßnahmen kann die Güte der zu bearbeitenden Oberflächen weiter erhöht werden.Furthermore, drive means can be provided with which the finishing belt can be driven to oscillate transversely to its longitudinal direction. Alternatively or additionally, the workpiece can be driven to oscillate transversely to the longitudinal direction of the finishing belt. By these measures, the quality of the surfaces to be processed can be further increased.

Weitere vorteilhafte Ausgestaltungen und Einzelheiten der Erfindung sind der folgenden Beschreibung zu entnehmen, in der die Erfindung anhand des in der Zeichnung dargestellten Ausführungsbeispiels näher beschrieben und erläutert ist.Further advantageous embodiments and details of the invention are apparent from the following description in which the invention with reference to the embodiment shown in the drawing is described and explained in more detail.

Es zeigen:

Figur 1
eine Seitenansicht einer Bearbeitungszange mit einer an einem freien Ende eines Bearbeitungsarms vorgesehenen Finishvorrichtung;
Figur 2
eine vergrößerte Seitenansicht der Finishvorrichtung gemäß Figur 1; und
Figur 3
eine geschnittene Ansicht eines Teils der Finishvorrichtung entsprechend den Pfeilen III-III in Figur 2.
Show it:
FIG. 1
a side view of a processing pliers with a provided at a free end of a processing arm finishing device;
FIG. 2
an enlarged side view of the finishing device according to FIG. 1 ; and
FIG. 3
a sectional view of a part of the finishing device according to the arrows III-III in FIG. 2 ,

Die Figur 1 zeigt eine insgesamt mit 10 bezeichnete Bearbeitungszange einer nicht dargestellten Feinstbearbeitungsmaschine, wobei die Bearbeitungszange 10 zwei Bearbeitungsarme 12 und 14 aufweist, die um Schwenklager 16 und 18 derart schwenkbar gelagert sind, dass ihre freien Enden 20 und 22 in Richtung auf ein Werkstück 24 beziehungsweise weg von diesem verschwenkbar sind. Die Bearbeitungsarme 12 und 14 werden, wie aus dem Stand der Technik bekannt, hydraulisch, pneumatisch oder mechanisch angetrieben.The FIG. 1 shows a generally designated 10 processing tongs of a microfinishing machine, not shown, wherein the processing tongs 10 has two processing arms 12 and 14 which are pivotally mounted about pivot bearings 16 and 18 so that their free ends 20 and 22 in the direction of a workpiece 24 and away from this are pivotable. The machining arms 12 and 14 are hydraulically, pneumatically or mechanically driven as known in the art.

In der Figur 1 ist mit dem Bezugszeichen 26 ein Finishband bezeichnet, das von einer nicht dargestellten Vorratsrolle in Richtung des Pfeils 28 abgezogen, über eine Umlenkrolle 30 umgelenkt und einer Finishvorrichtung 32 zugeleitet wird. Aus dieser gelangt das Finishband 26 zu einer Zusatzführung 34 und schließlich zu einer nicht dargestellten Aufwickelrolle. Die Bearbeitung von Wellensitzen sollte mit zwei Finishvorrichtungen 32 erfolgen.In the FIG. 1 is denoted by the reference numeral 26, a finishing belt, which is subtracted from a supply roll, not shown in the direction of arrow 28, deflected by a guide roller 30 and a finishing device 32 is fed. From this, the finishing belt 26 reaches an additional guide 34 and finally to a take-up reel, not shown. The machining of shaft seats should be done with two finishing devices 32.

An dem freien Ende 22 des Bearbeitungsarms 14 ist ein Haltebock 36 befestigt, an dem eine Lünette 38 einteilig angeformt ist. Diese Lünette 38 dient zur Aufnahme eines Einsatzes 40, in dem zwei Anlagestücke 42 angeordnet sind, die am Werkstück 24 anliegen. Die Lünette 38 wird aufgrund der Zentrifugalkräfte lediglich bei der Bearbeitung von Hublagern einer Kurbelwelle benötigt.At the free end 22 of the processing arm 14, a holding bracket 36 is attached to which a bezel 38 is integrally formed. This bezel 38 serves to receive an insert 40, in which two abutment pieces 42 are arranged, which bear against the workpiece 24. The bezel 38 is needed due to the centrifugal forces only in the processing of crank bearings of a crankshaft.

In Figur 2 ist die Finishvorrichtung 32 vergrößert dargestellt. Am freien Ende 20 des Bearbeitungsarms 12 ist ein Haltebock 44 mit Hilfe von zwei Schrauben 46 und 48 befestigt. Am Haltebock 44 ist ein mit Bezugszeichen 50 bezeichneter Finishbandeinlauf mit Hilfe einer Befestigungsschraube 52 gesichert. Der Finishbandeinlauf 50 weist ein nach außen abgerundetes Anlaufelement 54 für das von der Umlenkrolle 30 zugeführte Finishband 26 auf. Durch das Anlaufelement 54 wird das Finishband relativ zu einer im Finishbandeinlauf 50 ausgebildeten hohlzylindrischen Führungsfläche 56 ausgerichtet. Durch die Führungsfläche 56 wird das Finishband 26 aus einem ungekrümmten in einen gekrümmten Zustand überführt. Dann gelangt es zu einem Kontaktelement 58, das formschlüssig in einem Lagerelement 60 gelagert ist, das am Haltebock 44 angeordnet ist. Das Finishband 26 liegt mit einem Anlagebereich 62 am Werkstück 24 an und umschlingt dieses innerhalb eines kleinen Umschlingungswinkels 64. Der Haltebock 44 und das Lagerelement 60 sind einteilig ausgeführt.In FIG. 2 the finishing device 32 is shown enlarged. At the free end 20 of the machining arm 12, a holding bracket 44 by means of two screws 46 and 48 is attached. On the support bracket 44 designated by the reference numeral 50 finish belt inlet is secured by means of a fastening screw 52. The finish belt inlet 50 has an outwardly rounded starting element 54 for the finishing belt 26 fed by the deflection roller 30. The start-up element 54 aligns the finishing belt relative to a hollow-cylindrical guide surface 56 formed in the finish belt inlet 50. By the guide surface 56, the finishing belt 26 is transferred from an unbent to a curved state. Then it arrives at a contact element 58 which is mounted in a form-fitting manner in a bearing element 60 which is arranged on the holding block 44. The finishing belt 26 rests against the workpiece 24 with a contact region 62 and wraps it around within a small angle of wrap 64. The holding bracket 44 and the bearing element 60 are made in one piece.

In seinem weiteren Verlauf wird das Finishband 26 einer hohlzylindrischen Führungsfläche 66 zugeführt, die in einem Finishbandauslauf 68 vorgesehen ist. Hieran anschließend passiert das Finishband 26 ein Umlenkelement 70, bevor es der Zusatzführung 34 und der nicht dargestellten Aufwickelrolle zugeführt wird.In its further course, the finishing belt 26 is fed to a hollow cylindrical guide surface 66, which is provided in a finishing belt outlet 68. Following this, the finishing belt 26 passes a deflecting element 70 before it is fed to the additional guide 34 and the take-up reel, not shown.

In Figur 3 ist ein Abschnitt des Finishbandeinlaufs 50 dargestellt. In diesem ist die bereits genannte hohlzylindrische Führungsfläche 56 ausgebildet. Das auf Höhe der in Figur 2 dargestellten Umlenkrolle 30 noch ungekrümmte Finishband wird durch die Führungsfläche 56 in einen gekrümmten Zustand überführt und gelangt anschließend mit seinem Anlagebereich 62 in Kontakt mit dem Werkstück 24.In FIG. 3 a portion of the finish belt inlet 50 is shown. In this, the already mentioned hollow cylindrical guide surface 56 is formed. At the height of in FIG. 2 shown deflection roller 30 is still uncurved finishing belt is transferred by the guide surface 56 in a curved state and then passes with its abutment portion 62 in contact with the workpiece 24th

Das Finishband 26 ist um eine in Längsrichtung des Finishbands 26 verlaufende Achse 72, die senkrecht zu einer Rotationsachse 74 des Werkstücks 24 verläuft, mehrfach gekrümmt. Das Finishband 26 weist einen ersten Teilbereich 76 auf, mit dem es mit einer am Werkstück 24 ausgebildeten Lagerfläche in Kontakt steht. Benachbart zum ersten Teilbereich 76 weist das Finishband 26 gekrümmte, zweite Teilbereiche 80 auf, wobei die Krümmung des Finishbands in diesen Teilbereichen am Werkstück 24 zu bearbeitenden Radien 82 entspricht. Benachbart zu den Radien 82 sind am Werkstück 24 Wangen 84 ausgebildet.The finishing belt 26 is repeatedly curved about an axis 72 extending in the longitudinal direction of the finishing belt 26, which runs perpendicular to a rotation axis 74 of the workpiece 24. The finishing belt 26 has a first portion 76 with which it is in contact with a bearing surface formed on the workpiece 24. Adjacent to the first partial region 76, the finishing belt 26 has curved, second partial regions 80, the curvature of the finishing belt in these partial regions corresponding to radii 82 to be machined on the workpiece 24. Adjacent to the radii 82 cheeks 84 are formed on the workpiece 24.

Mit der erfindungsgemäßen Vorrichtung können die Radien 82 übergangslos in die Lagerfläche 78 beziehungsweise in die von den Wangen 84 ausgebildeten Flächen übergehen. Somit kann einerseits die Lagerfläche 78 möglichst breit ausgebildet werden und andererseits vermieden werden, dass die Radien 82 Kerbstellen für das Werkstück 24 bilden.With the device according to the invention, the radii 82 can be transferred seamlessly into the bearing surface 78 or into the area of go over the cheeks 84 trained areas. Thus, on the one hand, the bearing surface 78 can be formed as wide as possible and on the other hand can be avoided that the radii 82 form notches for the workpiece 24.

Claims (9)

  1. Finishing device (32) for a superfinishing machine, with a finishing belt (26), which can be driven in the longitudinal direction and brought into contact with a contact area (62) on a work piece (24) that is to be machined, whereby the finishing belt (26) has a curvature in its area of contact (62) about an axis (72) running in the longitudinal direction of the finishing belt (26) and the finishing belt (26) is arranged between the axis (72) and the work piece (24) and a finishing belt guide is provided, which modifies the curvature of the finishing belt (26) about the axis (72) running in the longitudinal direction and the finishing belt guide has a finishing belt opening (50), with which a section of the finishing belt (26) to be fed to the work piece (24) can be converted from an uncurved state to a curved state, in such a way that the area of contact (62) of the finishing belt (26) points radially outward. The work piece (24) can be driven in a rotational sense; the area of contact (62) has a first partial area (76) running parallel to the axis of rotation (74) of the work piece (24) and a curved, second partial area (80), whose perpendiculars run obliquely to the axis of rotation (74); the first partial area (76) can be placed in contact with a bearing surface (78) to be machined on a work piece (24), whereby the curvature of the second partial area (80) is equal to a radius (82) to be formed on the work piece (24); the second partial area (80) can be placed in contact with a radius (82) to be machined on the work piece (24) neighbouring the bearing surface (78); the curved second partial area (80) in the finishing belt opening (50) and on the work piece (24) is curved in the same direction and by which means the finishing belt guide has hollow cylindrical guide surfaces (56, 66), which surround the finishing belt (26), at least in sections.
  2. Finishing device according to claim 1, characterised in that the finishing belt (26) is curved to complement the contour of the work piece (24).
  3. Finishing device according to one of the preceding claims, characterised in that the finishing belt (26) has a complex curved surface about the axis (72) running in the longitudinal direction.
  4. Finishing device according to one of the preceding claims, characterised in that the finishing belt guide has a finishing belt outlet (68), with which a section of the finishing belt (26) to be traversed by the work piece (24) is converted from a curved to an uncurved condition.
  5. Finishing device according to one of the preceding claims, characterised in that a contact element (58) is provided, which presses the area of contact (62) of the finishing belt (26) against the work piece (24).
  6. Finishing device according to claim 5, characterised in that the contact element (58) is formed to complement the contour of the work piece (24).
  7. Finishing device according to one of the preceding claims, characterised in that the contact area (62) of the finishing belt (26) twists around a section of the work piece (24), in particular with an arc of contact (64) of 2° to 40°, in particular 30°.
  8. Finishing device according to one of the preceding claims, characterised in that a means of driving is provided, with which the finishing belt (26) can be driven at right angles to its longitudinal direction with an oscillatory drive.
  9. Finishing device according to one of the preceding claims, characterised in that a means of driving is provided, with which the work piece (24) can be driven at right angles to the longitudinal direction of the finishing belt (26) with an oscillatory drive.
EP03400054A 2003-09-16 2003-09-16 Finishing apparatus Expired - Lifetime EP1518643B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT03400054T ATE447461T1 (en) 2003-09-16 2003-09-16 FINISHING DEVICE
EP03400054A EP1518643B1 (en) 2003-09-16 2003-09-16 Finishing apparatus
DE50312089T DE50312089D1 (en) 2003-09-16 2003-09-16 finish device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP03400054A EP1518643B1 (en) 2003-09-16 2003-09-16 Finishing apparatus

Publications (2)

Publication Number Publication Date
EP1518643A1 EP1518643A1 (en) 2005-03-30
EP1518643B1 true EP1518643B1 (en) 2009-11-04

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ID=34178676

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Application Number Title Priority Date Filing Date
EP03400054A Expired - Lifetime EP1518643B1 (en) 2003-09-16 2003-09-16 Finishing apparatus

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Country Link
EP (1) EP1518643B1 (en)
AT (1) ATE447461T1 (en)
DE (1) DE50312089D1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103447919A (en) * 2013-09-02 2013-12-18 奇瑞汽车股份有限公司 Device for automatically removing black spots of cam shaft

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2399706B9 (en) * 2010-06-22 2013-10-02 Supfina Grieshaber GmbH & Co. KG Finishing device for finishing the surfaces of workpieces
DE102011081918A1 (en) 2011-08-31 2013-02-28 Nagel Maschinen- Und Werkzeugfabrik Gmbh Finishing machine for finishing curved workpiece surfaces on workpieces
EP2617523B1 (en) * 2012-01-23 2014-04-23 Supfina Grieshaber GmbH & Co. KG Finishing device for finishing a workpiece
DE112018006359A5 (en) * 2017-12-14 2020-10-01 Thielenhaus Technologies Gmbh Pressure shoe
DE102022114485A1 (en) 2022-06-09 2023-12-14 Supfina Grieshaber Gmbh & Co. Kg Finishing device for finishing workpieces

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2081699C (en) * 1992-08-14 1998-06-09 James D. Phillips Crankpin grinder
DE4401548B4 (en) * 1994-01-13 2005-05-25 Dr. Koch Investment und Beteiligung Holding S.A. Grinding device for the machining of workpiece surfaces of rotationally symmetrical and symmetrical workpieces by means of abrasive belts
DE29819443U1 (en) * 1998-10-31 1998-12-24 Nagel Maschinen- und Werkzeugfabrik GmbH, 72622 Nürtingen Device for fine machining of essentially cylindrical workpiece surfaces
FR2808463B1 (en) * 2000-05-04 2002-09-13 Procedes Et Machines Speciales ABRASIVE TAPE MACHINE FOR CYLINDRICAL DOORS ON PARTS

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103447919A (en) * 2013-09-02 2013-12-18 奇瑞汽车股份有限公司 Device for automatically removing black spots of cam shaft
CN103447919B (en) * 2013-09-02 2015-09-23 奇瑞汽车股份有限公司 A kind of device of automatic removal camshaft blackspot

Also Published As

Publication number Publication date
EP1518643A1 (en) 2005-03-30
DE50312089D1 (en) 2009-12-17
ATE447461T1 (en) 2009-11-15

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