EP0755752A1 - Method for finishing piston rings - Google Patents

Method for finishing piston rings Download PDF

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Publication number
EP0755752A1
EP0755752A1 EP96110787A EP96110787A EP0755752A1 EP 0755752 A1 EP0755752 A1 EP 0755752A1 EP 96110787 A EP96110787 A EP 96110787A EP 96110787 A EP96110787 A EP 96110787A EP 0755752 A1 EP0755752 A1 EP 0755752A1
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EP
European Patent Office
Prior art keywords
workpieces
segments
package
tool
movement
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Granted
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EP96110787A
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German (de)
French (fr)
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EP0755752B1 (en
Inventor
Manfred Dipl.-Ing. Brocksieper
Eberhard Schneider
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Federal Mogul Burscheid GmbH
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Federal Mogul Burscheid GmbH
AE Goetze GmbH
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Publication of EP0755752A1 publication Critical patent/EP0755752A1/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
    • 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
    • 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
    • B24B19/11—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 the circumferential surface of rings, e.g. piston rings
    • 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
    • B24B33/00—Honing machines or devices; Accessories therefor
    • B24B33/04—Honing machines or devices; Accessories therefor designed for working external surfaces of revolution

Definitions

  • the invention relates to a method for the fine machining of the outer peripheral surface of slotted, radially outwardly clamping, annular workpieces, in particular piston rings combined into a package, by means of a tool encompassing the workpieces and consisting of at least two segments, the segments having a surface with a defined radius of curvature to which the workpieces lie flat and are moved relative to them.
  • the screws are used to adjust the contact pressure of the right half against the left half.
  • the contact pressure is adjusted depending on the wear of the honing can.
  • the disadvantage of this device is due to the fact that an out-of-roundness of the inner bore occurs when the contact pressure is adjusted.
  • the consumption of honing tins is a particular problem when machining piston rings. Due to the great wear of the inner bore of the honing sleeves, a large number of sleeves must be made available. Adjusting the honing rifles has proven to be unsuitable with regard to the quality requirements of modern engines. In addition, the aqueous or oily lapping media used cause high disposal costs.
  • the invention has for its object to overcome the disadvantages inherent in the known devices and to create a new finishing process with which surface topographies can be achieved which in particular improve the running properties of piston rings.
  • This object is achieved in that the segments are first fed to the workpieces in such a way that an abrasive belt which adapts to the surface is brought into abrasive contact with the workpieces and in the machining position the radii of curvature of the surfaces lie on a common center point, and then the workpieces are relative to the abrasive belt are moved, the set machining position of the segments being kept constant during the fine machining.
  • a closed, locked machining tool is created, which is used for guiding and machining the workpieces.
  • the specific contact pressure is generated by the internal stress of the workpieces.
  • the workpieces are axially moved back and forth by discs arranged at the end region of the package, it being particularly advantageous that the workpieces are guided in the package with axial play, so that each individual workpiece presses against the grinding belt under its own tension.
  • the discs transmit the rotary motion to the workpieces. The Transmission of the rotary motion is initiated in the dead center of the axial reciprocating motion.
  • the transmission of the rotary movement to the individual workpieces within the package takes place by means of frictional forces between the individual workpieces. It is also conceivable that the workpieces are specifically axially clamped and relaxed during machining in order to initiate a forced, periodic rotation and thereby to produce a targeted grinding pattern.
  • the relative speed of the individual movements can be selected so that cross hatching with a predeterminable cross angle and a roughness depth R z of less than or equal to 3 ⁇ m is generated.
  • a wobble movement is initiated during the back-and-forth movement.
  • the tool consist of two segments, the radius of curvature of which corresponds approximately to that of a workpiece clamped to the nominal diameter and an abrasive belt is arranged on the surface thereof.
  • the segments can be radially fed into the package via a guide and can be fixed using fastening means when the processing position is reached. Since the parcel is moved into the opened processing station, the usual parcel entry via an insertion cone is not necessary. As a result, breakouts on the workpieces can be avoided at the edges, the scrap is thus reduced and the quality is improved.
  • the disks can be adjusted to a swivel angle by means of an adjustment mechanism acting on the disks. This setting can be changed during editing. It would also be conceivable to make the disks stationary and to make the processing station pivotable, or to use disks with an inclined plane surface.
  • a tool consisting of two segments (3, 3 ') is provided for carrying out the method according to the invention for in particular piston rings (1), which are combined to form a package (2) Has grinding belt (4).
  • the radius of curvature of the surface (5, 5 ') of the segments (3, 3') corresponds to that of a piston ring (1) stretched to the nominal diameter.
  • the piston rings (1) are fed to the segments (3, 3 ') as a package (2) with the aid of a slide (6).
  • the pack (2) is moved axially loosely or tensioned between the segments (3, 3 ') with the aid of disks (7, 7') acting on the end region of the pack (2).
  • the segments (3, 3 ') are fed radially to the package (2) held between the disks (7, 7') via a guide (8).
  • this position is locked by means of fastening means (9), for example in the form of hydraulic cylinders.
  • fastening means (9) for example in the form of hydraulic cylinders.
  • the method according to the invention removes material via an abrasive grain bound on an abrasive belt.
  • the abrasive belt (4) can be continuously clocked from a roll, so that even material removal is ensured at all times.

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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)

Abstract

The method involves a tool comprising two segments (3,3') which have an abrasive belt (4) lining suitably curved inner surfaces (5,5'). The workpieces (1) are brought into abrasive contact with the belts by adjusting the tool so that the curved inner surfaces have a common centre. The batches of workpieces are moved to-and-fro axially and rotated w.r.t. the belts so that machining takes place continuously at the same rate. The tool simultaneously locks, guides and machines the split ring workpieces. The force associated with the contact is consistently generated from the rings themselves.

Description

Die Erfindung betrifft ein Verfahren zur Feinbearbeitung der Außenumfangsfläche von geschlitzten, radial nach außen spannenden, ringförmigen Werkstücken, insbesondere von zu einem Paket zusammengefaßten Kolbenringen mittels eines die Werkstücke umgreifenden, aus mindestens zwei Segmenten bestehenden Werkzeuges, wobei die Segmente eine einen definierten Krümmungsradius aufweisende Oberfläche besitzen, an die sich die Werkstücke flächig anlegen und relativ dazu bewegt werden.The invention relates to a method for the fine machining of the outer peripheral surface of slotted, radially outwardly clamping, annular workpieces, in particular piston rings combined into a package, by means of a tool encompassing the workpieces and consisting of at least two segments, the segments having a surface with a defined radius of curvature to which the workpieces lie flat and are moved relative to them.

Zur Feinbearbeitung von Kolbenringen werden diese bisher zu einem Paket zusammengefaßt und innerhalb einer Honbüchse dadurch am Außenumfang bearbeitet, daß ein mit Kolbenringen bestückter Dorn in die Büchse einfährt und dort hin- und herbewegt und gedreht wird. Die DE 30 11 670 offenbart eine derartige Vorrichtung, bei der die Honbüchse einen kreiszylindrischen Querschnitt aufweist. Der Innendurchmesser entspricht dabei dem Durchmesser, den die Kolbenringe im Betrieb aufweisen. Im oberen Bereich der Honbüchse besitzt diese an ihrer Innenseite eine leicht konisch verlaufende Abschrägung. Über diese Abschrägung werden die Kolbenringe in die Honbüchse gedrückt. Die Honbüchse besteht aus zwei Hälften und wird mittels Schrauben verspannt. Die Schrauben dienen dazu, eine Nachstellung der Anpreßkraft der rechten Hälfte gegen die linke Hälfte auszuführen. In Abhängigkeit von der Abnützung der Honbüchse erfolgt eine Nachstellung der Anpreßkraft. Der Nachteil dieser Vorrichtung begründet sich dadurch, daß bei Nachstellung der Anpreßkraft eine Unrundheit der Innenbohrung sich einstellt. Der Verbrauch von Honbüchsen ist ein besonderes Problem bei der Kolbenringbearbeitung. Durch den großen Verschleiß der Innenbohrung der Honbüchsen müssen eine Vielzahl von Büchsen bereitgestellt werden. Das Nachstellen der Honbüchsen hat sich in bezug auf die Qualitätsanforderung moderner Motoren als nicht zweckmäßig erwiesen. Hinzu kommt, daß die verwendeten wässrigen oder öligen Läppmedien hohe Entsorgungskosten verursachen.For the fine machining of piston rings, these have so far been combined into a package and machined on the outer circumference within a honing sleeve in that a mandrel equipped with piston rings moves into the sleeve and is moved back and forth and rotated there. DE 30 11 670 discloses such a device in which the honing sleeve has a circular cylindrical cross section. The inside diameter corresponds to the diameter that the piston rings have during operation. In the upper area of the honing can it has a slightly conical bevel on the inside. The piston rings are pressed into the honing sleeve via this bevel. The honing sleeve consists of two halves and is clamped using screws. The screws are used to adjust the contact pressure of the right half against the left half. The contact pressure is adjusted depending on the wear of the honing can. The disadvantage of this device is due to the fact that an out-of-roundness of the inner bore occurs when the contact pressure is adjusted. The consumption of honing tins is a particular problem when machining piston rings. Due to the great wear of the inner bore of the honing sleeves, a large number of sleeves must be made available. Adjusting the honing rifles has proven to be unsuitable with regard to the quality requirements of modern engines. In addition, the aqueous or oily lapping media used cause high disposal costs.

Der Erfindung liegt die Aufgabe zugrunde, die den bekannten Vorrichtungen anhaftenden Nachteile zu überwinden und ein neues Feinbearbeitungsverfahren zu schaffen, mit dem sich Oberflächentopographien erreichen lassen, die insbesondere die Laufeigenschaften von Kolbenringen verbessern. Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Segmente zunächst derart den Werkstücken zugeführt werden, daß ein sich der Oberfläche anpassendes Schleifband in Schleifkontakt mit den Werkstücken gebracht wird und in Bearbeitungsstellung die Krümmunungsradien der Oberflächen auf einem gemeinsamen Mittelpunkt liegen, anschließend die Werkstücke relativ zum Schieifband bewegt werden, wobei während der Feinbearbeitung die eingestellte Bearbeitungsstellung der Segmente konstant beibehalten wird.The invention has for its object to overcome the disadvantages inherent in the known devices and to create a new finishing process with which surface topographies can be achieved which in particular improve the running properties of piston rings. This object is achieved in that the segments are first fed to the workpieces in such a way that an abrasive belt which adapts to the surface is brought into abrasive contact with the workpieces and in the machining position the radii of curvature of the surfaces lie on a common center point, and then the workpieces are relative to the abrasive belt are moved, the set machining position of the segments being kept constant during the fine machining.

Die Bearbeitung von Oberflächen mit Hilfe eines Schleifbandes ist bereits seit vielen Jahren bekannt. Hierbei handelt es sich um ein Verfahren für die Feinbearbeitung zylindrischer und gewölbter Flächen bei Verwendung von Polierband als Schneidmittel. Formgerecht ausgebildete Polierschalen, die selbst keinem Verschleiß unterliegen, weil sie außerhalb der Zerspanungszone liegen, drücken das Polierband an die Werkstückoberfläche. Die US 2 376 531 offenbart eine solche Vorrichtung. Das erfindungsgemäße Verfahren basiert auf einer solchen Vorrichtung, jedoch wird beim Anmeldungsgegenstand von seiten des Werkzeuges kein Druck auf die Werkstücke ausgeübt. Auf diese Weise ist es nunmehr möglich, auch geschlitzte, radial nach außen spannende Werkstücke, wie insbesondere Kolbenringe am Außenumfang zu bearbeiten, bisher konnten nur geschlossene, starre Werkstücke bearbeitet werden. Dadurch, daß die Krümmungsradien der Oberfläche der Segmente auf einen gemeinsamen Mittelpunkt liegen und dieser während der gesamten Bearbeitung konstant beibehalten wird, wird ein geschlossenes, verriegeltes Bearbeitungswerkzeug geschaffen, welches zur Führung und Bearbeitung der Werkstücke dient. Der spezifische Anpreßdruck wird von der Eigenspannung der Werkstücke erzeugt. Vorzugsweise werden die Werkstücke durch am Endbereich des Paketes angeordnete Scheiben axial hin- und herbewegt und gedreht, wobei es von besonderem Vorteil ist, daß die Werkstücke unter axialem Spiel im Paket geführt sind, so daß jedes einzelne Werkstück unter Eigenspannung sich am Schleifband anlegt. Die Scheiben übertragen die Drehbewegung auf die Werkstücke. Die Übertragung der Drehbewegung wird dabei in den Totenpunkten der axialen Hin- und Herbewegung eingeleitet. Die Übertragung der Drehbewegung auf die einzelnen Werkstücke innerhalb des Paketes erfolgt durch Reibkräfte zwischen den einzelnen Werkstücken. Denkbar ist auch, daß die Werkstücke während der Bearbeitung gezielt axial gespannt und entspannt werden, um eine zwangsweise, periodische Drehung einzuleiten und hierdurch ein gezieltes Schliffbild zu erzeugen. Es kann beispielsweise die Relativgeschwindigkeit der einzelnen Bewegungen so gewählt werden, daß eine Kreuzschraffur mit vorher bestimmbaren Kreuzwinkel und einer Rautiefe Rz kleiner gleich 3 µm erzeugt wird. Zur Erzeugung einer balligen Außenumfangsfläche wird während der Hin- und Her- und Drehbewegung eine Taumelbewegung eingeleitet.The processing of surfaces using an abrasive belt has been known for many years. This is a process for the fine machining of cylindrical and curved surfaces when using polishing tape as a cutting agent. Correctly designed polishing trays, which themselves are not subject to wear and tear because they lie outside the machining zone, press the polishing belt onto the workpiece surface. US 2,376,531 discloses such a device. The method according to the invention is based on such a device, but no pressure is exerted on the workpieces by the tool in the subject of the application. In this way it is now possible to machine slotted, radially outward clamping workpieces, such as piston rings in particular on the outer circumference; previously only closed, rigid workpieces could be machined. Characterized in that the radii of curvature of the surface of the segments lie on a common center and this is maintained constant throughout the machining, a closed, locked machining tool is created, which is used for guiding and machining the workpieces. The specific contact pressure is generated by the internal stress of the workpieces. Preferably, the workpieces are axially moved back and forth by discs arranged at the end region of the package, it being particularly advantageous that the workpieces are guided in the package with axial play, so that each individual workpiece presses against the grinding belt under its own tension. The discs transmit the rotary motion to the workpieces. The Transmission of the rotary motion is initiated in the dead center of the axial reciprocating motion. The transmission of the rotary movement to the individual workpieces within the package takes place by means of frictional forces between the individual workpieces. It is also conceivable that the workpieces are specifically axially clamped and relaxed during machining in order to initiate a forced, periodic rotation and thereby to produce a targeted grinding pattern. For example, the relative speed of the individual movements can be selected so that cross hatching with a predeterminable cross angle and a roughness depth R z of less than or equal to 3 μm is generated. To produce a spherical outer peripheral surface, a wobble movement is initiated during the back-and-forth movement.

Zur Durchführung des erfindungsgemäßen Verfahrens wird vorgeschlagen, daß das Werkzeug aus zwei Segmenten besteht, deren Krümmungsradius etwa dem eines auf Nenndurchmesser gespannten Werkstückes entspricht und auf dessen Oberfläche ein Schleifband angeordnet ist. Die Segmente sind dem Paket über eine Führung radial zustellbar und bei Erreichung der Bearbeitungsstellung über Befestigungsmittel fixierbar. Da das Paket in die geöffnete Bearbeitungsstation eingefahren wird entfällt der sonst übliche Paketeinzug über einen Einführkonus. Hierdurch können an den Kanten Ausbrüche an den Werkstücken vermieden werden, der Ausschuß wird somit gesenkt und die Qualität verbessert. Durch einen an den Scheiben angreifenden Verstellmechanismus sind die Scheiben aufeinen Schwenkwinkel einstellbar. Diese Einstellung kann während der Bearbeitung verändert werden. Denkbar wäre auch, die Scheiben feststehend und die Bearbeitungsstation schwenkbar zu gestalten, oder Scheiben mit schräger Planfläche zu verwenden.To carry out the method according to the invention, it is proposed that the tool consist of two segments, the radius of curvature of which corresponds approximately to that of a workpiece clamped to the nominal diameter and an abrasive belt is arranged on the surface thereof. The segments can be radially fed into the package via a guide and can be fixed using fastening means when the processing position is reached. Since the parcel is moved into the opened processing station, the usual parcel entry via an insertion cone is not necessary. As a result, breakouts on the workpieces can be avoided at the edges, the scrap is thus reduced and the quality is improved. The disks can be adjusted to a swivel angle by means of an adjustment mechanism acting on the disks. This setting can be changed during editing. It would also be conceivable to make the disks stationary and to make the processing station pivotable, or to use disks with an inclined plane surface.

Die Erfindung ist in der Zeichnung anhand eines Ausführungsbeispieles dargestellt und wird im folgenden näher erläutert.The invention is illustrated in the drawing using an exemplary embodiment and is explained in more detail below.

Zur Durchführung des erfindungsgemäßen Verfahrens zur Feinbearbeitung von insbesondere Kolbenringen (1), die zu einem Paket (2) zusammengefaßt sind, ist ein aus zwei Segmenten (3, 3') bestehendes Werkzeug vorgesehen, welches am Innenumfang ein Schleifband (4) aufweist. Der Krümmungsradius der Oberfläche (5, 5') der Segmente (3, 3') entspricht dem des eines auf Nenndurchmesser gespannten Kolbenringes (1). Zur Feinbarbeitung des Paktes (2) werden die Kolbenringe (1) mit Hilfe eines Schiebers (6) als Paket (2) den Segmenten (3, 3') zugeführt. Mit Hilfe am Endbereich des Paketes (2) angreifender Scheiben (7, 7') wird das Paket (2) axial lose oder gespannt zwischen den Segmenten (3, 3') bewegt. Die Segmente (3, 3') werden dem zwischen den Scheiben (7, 7') gehaltenen Paket (2) über eine Führung (8) radial zugestellt. Bei Erreichung der Bearbeitungsstellung, das heißt sobald die Krümmungsradien der Oberflächen (5,5') auf einen gemeinsamen Mittelpunkt liegen, erfolgt eine Arretierung dieser Stellung über Befestigungsmittel (9), beispielsweise in Form von Hydraulikzylindern. Zur Feinbearbeitung der Außenumfangsfläche der einzelnen Kolbenringe (1) werden diese axial zwischen den Segmenten (3, 3') hin- und herbewegt und gedreht, gleichzeitig kann über einen Verstellmechanismus (10) ein Schwenkwinkel α eingestellt werden. Im Gegensatz zur Feinbearbeitung mit Honbüchsen erfolgt gemäß dem erfindungsgemäßen Verfahren ein Materialabtrag über ein auf einem Schleifband gebundenes Schleifkorn. Das Schleifband (4) kann von einer Rolle ablaufend kontinuierlich weitergetaktet werden, so daß jederzeit ein gleichmäßiger Materialabtrag sichergestellt ist.A tool consisting of two segments (3, 3 ') is provided for carrying out the method according to the invention for in particular piston rings (1), which are combined to form a package (2) Has grinding belt (4). The radius of curvature of the surface (5, 5 ') of the segments (3, 3') corresponds to that of a piston ring (1) stretched to the nominal diameter. To fine-tune the compact (2), the piston rings (1) are fed to the segments (3, 3 ') as a package (2) with the aid of a slide (6). The pack (2) is moved axially loosely or tensioned between the segments (3, 3 ') with the aid of disks (7, 7') acting on the end region of the pack (2). The segments (3, 3 ') are fed radially to the package (2) held between the disks (7, 7') via a guide (8). When the processing position is reached, that is, as soon as the radii of curvature of the surfaces (5,5 ') lie on a common center point, this position is locked by means of fastening means (9), for example in the form of hydraulic cylinders. For fine machining of the outer circumferential surface of the individual piston rings (1), these are moved axially back and forth between the segments (3, 3 ') and rotated, at the same time a swivel angle α can be set via an adjusting mechanism (10). In contrast to fine machining with honing tins, the method according to the invention removes material via an abrasive grain bound on an abrasive belt. The abrasive belt (4) can be continuously clocked from a roll, so that even material removal is ensured at all times.

Claims (10)

Verfahren zur Feinbearbeitung der Außenumfangsfläche von geschlitzten, radial nach außen spannenden, ringförmigen Werkstücken, insbesondere von zu einem Paket zusammengefaßten Kolbenringen mittels eines die Werkstücke umgreifenden, aus mindestens zwei Segmenten bestehenden Werkzeuges, wobei die Segmente eine einen definierten Krümmungsradius aufweisende Oberfläche besitzen, an die sich die Werkstücke flächig anlegen und relativ dazu bewegt werden, dadurch gekennzeichnet, daß die Segmente (3,3') zunächst derart den Werkstücken (1) zugeführt werden, daß ein sich der Oberfläche (5,5') anpassendes Schleifband (4) in Schleifkontakt mit den Werkstücken (1) gebracht wird und in Bearbeitungsstellung die Krümmungsradien der Oberflächen (5,5') auf einen gemeinsamen Mittelpunkt liegen, anschließend die Werkstücke (1) relativ zum Schleifband (4) bewegt werden, wobei während der Feinbearbeitung die eingestellte Bearbeitungsstellung der Segmente (3,3') konstant beibehalten wird.Method for fine machining the outer circumferential surface of slotted, radially outwardly clamping, ring-shaped workpieces, in particular of piston rings combined into a package, by means of a tool which encompasses the workpieces and consists of at least two segments, the segments having a surface with a defined radius of curvature, against which lay the workpieces flat and are moved relative to them, characterized in that the segments (3, 3 ') are first fed to the workpieces (1) in such a way that an abrasive belt (4) which adapts to the surface (5,5') makes sliding contact brought with the workpieces (1) and in the machining position the radii of curvature of the surfaces (5,5 ') lie on a common center point, then the workpieces (1) are moved relative to the grinding belt (4), the set machining position of the We keep segments (3,3 ') constant d. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Werkstücke (1) durch am Endbereich des Paketes (2) angeordneten Scheiben (7,7') axial hin- und herbewegt und gedreht werden.Method according to Claim 1, characterized in that the workpieces (1) are moved axially back and forth and rotated by discs (7, 7 ') arranged at the end region of the package (2). Verfahren nach den Ansprüchen 1 und 2, dadurch gekennezichnet, daß die Werkstücke (1) unter axialem Spiel im Paket (2) geführt sind, so daß jedes Werkstück (1) unter Eigenspannung sich am Schleifband (4) anlegt.Process according to claims 1 and 2, characterized in that the workpieces (1) are guided in the package (2) with axial play, so that each workpiece (1) lies against the grinding belt (4) under its own tension. Verfahren nach den Ansprüchen 1 bis 3, dadurch gekennzeichnet, daß die Schreiben (7,7') eine Drehbewegung auf die Werkstücke (1) übertragen, wobei die Übertragung in den Totpunkten der Hin- und Herbewegung von jeweils nur einer Scheibe (7,7') eingeleitet wird.Method according to claims 1 to 3, characterized in that the writing (7, 7 ') transmit a rotary movement to the workpieces (1), the transmission in the dead centers of the reciprocating movement of only one disk (7, 7 ') is initiated. Verfahren nach den Ansprüchen 1 bis 4, dadurch gekennzeichnet, daß durch gesteuertes axiales Spannen und Lösen der Werkstücke zwischen den Endscheiben eine gezielte Drehbewegung der Werkstücke eingeleitet wird.Process according to claims 1 to 4, characterized in that a controlled rotational movement of the workpieces is initiated by controlled axial clamping and loosening of the workpieces between the end plates. Verfahren nach den Ansprüchen 1 bis 5, dadurch gekennzeichnet, daß die Relativgeschwindigkeiten der Hin- und Herbewegung sowie der Drehbewegung so gewählt sind, daß eine gezielte Kreuzschraffur mit einer Rauhtiefe Rz kleiner gleich 3µm erzeugt wird.Method according to claims 1 to 5, characterized in that the relative speeds of the back and forth movement and the rotary movement are selected so that a targeted cross hatching with a roughness depth R z less than or equal to 3 µm is produced. Verfahren nach den Ansprüchen 1 bis 6, dadurch gekennzeichnet, daß während der Hin-, Her- und Drehbewegung zwischen Werkstück (1) und Werkzeug eine Taumelbewegung eingeleitet wird, so daß eine ballige Außenumfangsfläche erzeugt wird.Method according to claims 1 to 6, characterized in that a wobble movement is initiated during the back-and-forth and rotary movement between the workpiece (1) and the tool, so that a spherical outer peripheral surface is produced. Vorrichtung zur Durchführung des Verfahrens nach mindestens einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß das Werkzeug aus zwei Segmenten (3,3') besteht, deren Krümmungsradius etwa dem eines auf Nenndurchmesser gespannten Werkstückes (1) entspricht und auf dessen Oberfläche ein Schleifband (4) angeordnet ist.Device for carrying out the method according to at least one of claims 1 to 7, characterized in that the tool consists of two segments (3, 3 '), the radius of curvature of which corresponds approximately to that of a workpiece (1) clamped to the nominal diameter and an abrasive belt on the surface thereof (4) is arranged. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, daß die Segmente (3,3') dem Paket (2) über eine Führung (8) radial zustellbar sind und bei Erreichung der Bearbeitungsstellung die Einstellung über Befestigungsmittel (9) fixierbar ist.Device according to claim 8, characterized in that the segments (3, 3 ') can be radially advanced to the package (2) via a guide (8) and the setting can be fixed by means of fastening means (9) when the processing position is reached. Vorrichtung nach den Ansprüchen 8 und 9, dadurch gekennzeichnet, daß die Scheiben (7,7') relativ zu den Segmenten (3,3') durch einen Verstellmechanismus (10) auf einen Schwenkwinkel α einstellbar sind.Device according to claims 8 and 9, characterized in that the disks (7, 7 ') can be adjusted relative to the segments (3, 3') by an adjustment mechanism (10) to a swivel angle α.
EP96110787A 1995-07-22 1996-07-04 Method and apparatus for finishing piston rings Expired - Lifetime EP0755752B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19526863 1995-07-22
DE19526863A DE19526863C2 (en) 1995-07-22 1995-07-22 Method for fine machining the outer peripheral surface of slotted, radially outwardly clamping, ring-shaped workpieces, in particular piston rings combined into a package, and device for carrying out the method

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EP0755752A1 true EP0755752A1 (en) 1997-01-29
EP0755752B1 EP0755752B1 (en) 1999-12-29

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US (1) US5775978A (en)
EP (1) EP0755752B1 (en)
JP (1) JPH0929600A (en)
DE (3) DE19526863C2 (en)
ES (1) ES2141417T3 (en)
PT (1) PT755752E (en)

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CN109318067A (en) * 2018-10-30 2019-02-12 赵虎 A kind of vulcanie ring surface processing equipment and rubber ring process of surface treatment
CN109352478A (en) * 2018-10-30 2019-02-19 赵虎 A kind of automatic processing system for the processing of vulcanie ring surface
CN112207659A (en) * 2020-10-15 2021-01-12 安徽太极象信息科技有限公司 Valve block automatic feeding equipment of polishing

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CN109318067A (en) * 2018-10-30 2019-02-12 赵虎 A kind of vulcanie ring surface processing equipment and rubber ring process of surface treatment
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CN112207659A (en) * 2020-10-15 2021-01-12 安徽太极象信息科技有限公司 Valve block automatic feeding equipment of polishing

Also Published As

Publication number Publication date
PT755752E (en) 2000-04-28
DE19605059C1 (en) 1997-07-17
JPH0929600A (en) 1997-02-04
DE19526863A1 (en) 1997-01-23
DE19526863C2 (en) 1997-06-12
EP0755752B1 (en) 1999-12-29
ES2141417T3 (en) 2000-03-16
US5775978A (en) 1998-07-07
DE59604015D1 (en) 2000-02-03

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