EP0755752B1 - Method and apparatus for finishing piston rings - Google Patents
Method and apparatus for finishing piston rings Download PDFInfo
- Publication number
- EP0755752B1 EP0755752B1 EP96110787A EP96110787A EP0755752B1 EP 0755752 B1 EP0755752 B1 EP 0755752B1 EP 96110787 A EP96110787 A EP 96110787A EP 96110787 A EP96110787 A EP 96110787A EP 0755752 B1 EP0755752 B1 EP 0755752B1
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- EP
- European Patent Office
- Prior art keywords
- workpieces
- segments
- tool
- stack
- curvature
- 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
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
- B24B21/004—Machines or devices using grinding or polishing belts; Accessories therefor using abrasive rolled strips
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
- B24B19/08—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding non-circular cross-sections, e.g. shafts of elliptical or polygonal cross-section
- B24B19/11—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
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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
- 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 and a device for finishing the outer peripheral surface of slotted, radially outwardly exciting, ring-shaped workpieces, in particular of piston rings combined into a package according to the preambles of claims 1 and 8.
- DE 30 11 670 discloses such a method and an associated device.
- the screws are used to adjust the contact pressure of the right Execute half against the left half.
- the honing rifle adjusts the contact pressure.
- the disadvantage of this device is based on the fact that when the contact pressure is adjusted, a non-roundness of the Inner bore adjusts itself.
- the consumption of honing tins is a particular problem in piston ring machining. Due to the large wear of the inner bore of the A large number of tins must be provided for honing tins.
- the adjustment The honing rifle has proven itself in terms of the quality requirements of modern engines not proven to be useful.
- the aqueous or oily used Lapping media cause high disposal costs.
- the invention has for its object the known devices overcome inherent disadvantages and a new finishing process create with which surface topographies can be achieved, in particular the Improve the running properties of piston rings. This task is accomplished through a process and a device according to claims 1 and 8 solved.
- 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 preferably moved axially back and forth and rotated 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 lies against the grinding belt under its own tension.
- the discs transmit the rotary motion to the workpieces. The transmission of the rotary movement is initiated in the dead center of the axial back and forth movement.
- 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 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 produced.
- a wobble movement is initiated during the back-and-forth movement.
- the workpieces comprehensive tool consisting of at least two segments
- the Segments have a surface that has a defined radius of curvature It is proposed that the workpieces lay flat Workpieces and tools relatively moved the tool consists of two segments, the Radius of curvature approximately that of a workpiece clamped to the nominal diameter corresponds and on the surface of which an abrasive belt is arranged.
- the segments are additional the package can be delivered radially via a guide and when the Machining position fixable with fasteners.
- the disks As the package in the open Processing station is retracted, the usual package infeed via a Insertion cone. This can cause breakouts on the workpieces at the edges can be avoided, the committee is reduced and the quality is improved.
- an adjustment mechanism acting on the disks are additionally the disks on one Adjustable swivel angle. This setting can be changed during editing become. It would also be conceivable for the disks to be stationary and the processing station to be pivotable, or to use panes with an inclined flat surface.
- the segments (3, 3 ') are between the disks (7, 7 ') held package (2) radially delivered via a guide (8).
- this position is locked via Fastening means (9), for example in the form of hydraulic cylinders.
- Fastening means (9) for example in the form of hydraulic cylinders.
- a swivel angle ⁇ can be set via an adjustment mechanism (10).
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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 und eine Vorrichtung
zur Feinbearbeitung der Außenumfangsfläche von
geschlitzten, radial nach außen spannenden, ringförmigen Werkstücken, insbesondere
von zu einem Paket zusammengefaßten Kolbenringen gemäß
den Oberbegriffen der Ansprüche 1 und 8. DE 30 11 670 offenbart ein solches Verfahren
und eine dazu gehörende Vorrichtung.The invention relates to a method and a device
for finishing the outer peripheral surface of
slotted, radially outwardly exciting, ring-shaped workpieces, in particular
of piston rings combined into a package according to
the preambles of
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. So far, they have been used as a package for the precision machining of piston rings summarized and thus machined on the outer circumference within a honing can, that a mandrel equipped with piston rings enters the bushing and goes there and back is moved and rotated. DE 30 11 670 discloses such a device which the honing can has a circular cylindrical cross section. The inside diameter corresponds to the diameter that the piston rings have during operation. At the top The area of the honing can has a slightly conical inside Bevel. The piston rings are inserted into the honing sleeve via this bevel pressed. The honing sleeve consists of two halves and is screwed together tense. The screws are used to adjust the contact pressure of the right Execute half against the left half. Depending on the wear of the The honing rifle adjusts the contact pressure. The disadvantage of this device is based on the fact that when the contact pressure is adjusted, a non-roundness of the Inner bore adjusts itself. The consumption of honing tins is a particular problem in piston ring machining. Due to the large wear of the inner bore of the A large number of tins must be provided for honing tins. The adjustment The honing rifle has proven itself in terms of the quality requirements of modern engines not proven to be useful. In addition, the aqueous or oily used Lapping media 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 durch ein Verfahren
und eine Vorrichtung gemäß den Ansprüchen 1 und 8 gelöst.The invention has for its object the known devices
overcome inherent disadvantages and a new finishing process
create with which surface topographies can be achieved, in particular the
Improve the running properties of piston rings. This task is accomplished through a process
and a device according to
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. Da 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 Oberflache 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 aufdie 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 Reiativgeschwindigkeit 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. Since the method according to the invention is based on such a device, however, 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 constantly maintained during the entire 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 preferably moved axially back and forth and rotated 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 lies against the grinding belt under its own tension. The discs transmit the rotary motion to the workpieces. The transmission of the rotary movement is initiated in the dead center of the axial back and forth movement. 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 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 produced. To produce a spherical outer peripheral surface, a wobble movement is initiated during the back-and-forth movement.
Bezüglich der Vorrichtung 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 wird vorgeschlagen, daß Werkstücke und Werkzeuge relativ bewegt werden, wobei 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 zusätzlich 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 Einführungskonus. 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 zusätzlich die Scheiben auf einen 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. Regarding the device for finishing the outer peripheral surface of slotted, radially outwardly exciting, ring-shaped workpieces, in particular of piston rings combined into a package, by means of which the workpieces comprehensive tool consisting of at least two segments, the Segments have a surface that has a defined radius of curvature It is proposed that the workpieces lay flat Workpieces and tools relatively moved the tool consists of two segments, the Radius of curvature approximately that of a workpiece clamped to the nominal diameter corresponds and on the surface of which an abrasive belt is arranged. The segments are additional the package can be delivered radially via a guide and when the Machining position fixable with fasteners. As the package in the open Processing station is retracted, the usual package infeed via a Insertion cone. This can cause breakouts on the workpieces at the edges can be avoided, the committee is reduced and the quality is improved. By an adjustment mechanism acting on the disks are additionally the disks on one Adjustable swivel angle. This setting can be changed during editing become. It would also be conceivable for the disks to be stationary and the processing station to be pivotable, or to use panes with an inclined flat 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 erfindungsgemäß 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.To carry out the method according to the invention for fine machining of in particular piston rings (1), which are combined to form a package (2), is an off two segments (3, 3 ') existing tool is provided, which on the inner circumference 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. For Finishing the pact (2), the piston rings (1) with the help of a slide (6) supplied as a package (2) to the segments (3, 3 '). With help at the end of the package (2) attacking discs (7, 7 '), the package (2) is axially loose or stretched between the Segments (3, 3 ') moves. The segments (3, 3 ') are between the disks (7, 7 ') held package (2) radially delivered via a guide (8). When the Machining position, that is, as soon as the radii of curvature of the surfaces (5, 5 ') open a common center point, this position is locked via Fastening means (9), for example in the form of hydraulic cylinders. For Finishing of the outer circumferential surface of the individual piston rings (1) becomes these axially back and forth between the segments (3, 3 ') and rotated, at the same time A swivel angle α can be set via an adjustment mechanism (10). in the Contrary to fine machining with honing tins is carried out according to the invention Process of material removal via an abrasive grain bound on an abrasive belt. The grinding belt (4) can be continuously clocked from a roll be so that a constant material removal is ensured at all times.
Claims (10)
- Method for fine machining of the outer periphery surface of grooved annular work pieces (1) stretching radially outwards, especially of piston rings combined in a stack by means of a tool encompassing the workpieces (1) and comprising at least two segments (3, 3'), the segments (3, 3') possessing a surface (5, 5') which has a defined radius of curvature and onto which the workpieces (1) are laid two-dimensionally and are moved relative thereto, characterised in that the segments (3, 3') are firstly advanced onto the workpieces (1) in such a way that an abrasive belt (4), which is accommodated to the surface (5, 5') of the tool and which is assigned to the segments (3, 3') is brought into abrasive contact with the workpieces (1) and that, in the machining position, the radii of curvature of the surfaces (5, 5') are situated on a common central point and next that the workpieces (1) are moved relative to the abrasive belt (4), the set machining position of the segments (3, 3') being kept constant during the fine machining.
- Method according to claim 1, characterised in that the workpieces (1) are moved axially to and fro and are rotated by means of discs (7, 7') which are arranged on the end region of the stack (2).
- Method according to claims 1 and 2, characterised in that the workpieces (1) are guided in the stack with axial clearance so that each workpiece (1) is laid down on the on the abrasive belt (4) by its own force
- Method according to claims 1 to 3, characterised in that the discs (7, 7') transfer a rotational movement on to the workpieces, the transference being introduced in the upper dead centres of the back and forward movement by only one disc (7, 7') respectively.
- Method according to the claims 1 to 4, characterised in that a targeted rotational movement of the workpieces is introduced between the end discs by means of controlled axial tensioning and slackening of the workpieces.
- Method according to claims 1 to 5, characterised in that the relative speeds of the back and forward movement and also of the rotational movement are chosen such that a targeted cross-hatching with a surface roughness Rz of less than 3 µm is produced.
- Method according to claims 1 to 6, characterised in that during the back-forward- and rotational- movement between the workpiece (1) and the tool a wobbling motion is introduced so that a lumpy outer periphery surface is produced.
- Device for fine machining of the outer periphery surface of grooved annular work pieces (1) stretching radially outwards, especially of piston rings combined in a stack by means of a tool encompassing the workpieces (1) and comprising at least two segments (3, 3'), the segments (3, 3') possessing a surface (5, 5') which has a defined radius of curvature and onto which the workpieces (1) are laid two-dimensionally, characterised in that workpieces (1) and tool are moved relative to one another according to one of the claims 1 to 7, the tool comprising two segments (3, 3') the radius of curvature of which corresponds roughly to the workpiece (1) tensioned to a nominal diameter and on the surface of which an adhesive belt (4) is arranged.
- Device according to claim 8, characterised in that the segments (3, 3') are radially suppliable to the stack (2) via a guiding means (8) and upon reaching the machining position the adjustment can be fixed by securing means (9).
- Device according to claim 8 or 9, characterised in that the stack (2) has tensioning discs (7, 7') provided which are adjustable relative to the segments (3, 3') by means of an adjusting mechanism (10) to a pivoting angle α .
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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0755752A1 EP0755752A1 (en) | 1997-01-29 |
| EP0755752B1 true EP0755752B1 (en) | 1999-12-29 |
Family
ID=7767563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP96110787A Expired - Lifetime EP0755752B1 (en) | 1995-07-22 | 1996-07-04 | Method and apparatus for finishing piston rings |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US5775978A (en) |
| EP (1) | EP0755752B1 (en) |
| JP (1) | JPH0929600A (en) |
| DE (3) | DE19526863C2 (en) |
| ES (1) | ES2141417T3 (en) |
| PT (1) | PT755752E (en) |
Families Citing this family (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19622116C2 (en) * | 1995-07-22 | 2000-08-03 | Federal Mogul Burscheid Gmbh | Short stroke band honing of piston ring running surfaces |
| FR2758756B1 (en) * | 1997-01-30 | 1999-02-26 | Procede Machines Speciales Spm | MACHINE ASSEMBLY BY ABRASIVE BELT OF A CYLINDRICAL RANGE OF A WORKPIECE |
| FR2764224B1 (en) * | 1997-06-06 | 1999-08-27 | Procede Machines Speciales Spm | MACHINING MACHINE BY ABRASIVE BELT FOR CYLINDRICAL SHAFT SEATS |
| GB9715597D0 (en) * | 1997-07-24 | 1997-10-01 | Bondface Technology Inc | Surface modification process |
| DE29719168U1 (en) * | 1997-10-29 | 1999-03-04 | Supfina Grieshaber GmbH & Co., 42859 Remscheid | Device for machining cylindrical workpieces |
| EP1486290B1 (en) * | 2003-06-12 | 2006-03-22 | Thielenhaus Technologies GmbH | Process for finishing three-dimensional curved ring surfaces and the tool therefor |
| JP2009119548A (en) * | 2007-11-14 | 2009-06-04 | Honda Motor Co Ltd | Shaft part finishing device |
| US20090170411A1 (en) * | 2007-12-29 | 2009-07-02 | Kenneth Barton | Micropolishing assembly for micropolishing piston rings |
| DE112009001993T5 (en) * | 2008-08-15 | 2012-01-26 | Metaldyne, Llc | Method and device for honing a workpiece and workpiece |
| ATE515371T1 (en) * | 2009-11-25 | 2011-07-15 | Supfina Grieshaber Gmbh & Co | FINISHING DEVICE |
| CN102189465B (en) * | 2011-04-12 | 2015-10-28 | 南通大学 | Positioning numerical control grinding machine for side edge of piston ring |
| DE202014102403U1 (en) * | 2014-05-22 | 2014-06-06 | Thielenhaus Technologies Gmbh | Pressing device with a toothed belt |
| CN104191338B (en) * | 2014-09-02 | 2016-08-24 | 欣邦五金制品（昆山）有限公司 | The through-hole plating of a kind of tubular rivet automatically removes device |
| CN105298678A (en) * | 2015-12-11 | 2016-02-03 | 常州南车柴油机零部件有限公司 | Outer circle textured honing piston ring, honing process and special honing device of outer circle textured honing piston ring |
| US9987717B2 (en) * | 2016-02-24 | 2018-06-05 | Supfina Grieshaber Gmbh & Co. Kg | Finishing device |
| CN106112741B (en) * | 2016-08-16 | 2018-12-14 | 仪征市双亚活塞环有限公司 | A kind of piston ring outer diameter face grinding device |
| US11010304B2 (en) * | 2018-01-09 | 2021-05-18 | Intel Corporation | Memory with reduced exposure to manufacturing related data corruption errors |
| CN108942541A (en) * | 2018-07-09 | 2018-12-07 | 安庆瑞莱博汽车配件有限公司 | A kind of automobile piston rings milling robot |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2318837A (en) * | 1940-01-31 | 1943-05-11 | Micromatic Hone Corp | Piston ring honing method |
| US2376531A (en) * | 1943-11-11 | 1945-05-22 | Albert P Schraner | Lapping machine |
| US3296747A (en) * | 1964-10-23 | 1967-01-10 | Goetzewerke | Method of and apparatus for honing piston rings |
| US4330963A (en) * | 1980-03-18 | 1982-05-25 | Kabushiki Kaisha Riken | Apparatus for grinding finish of piston rings |
| DE3011670A1 (en) * | 1980-03-26 | 1981-10-01 | Peter 7442 Neuffen Nagel | Honing bush for stack of piston rings - is longitudinally slotted with adjustable slot width, or split and slidable along inclined plane |
| US4682444A (en) * | 1984-05-07 | 1987-07-28 | Industrial Metal Products Corporation | Microfinishing apparatus and method |
-
1995
- 1995-07-22 DE DE19526863A patent/DE19526863C2/en not_active Expired - Fee Related
-
1996
- 1996-02-12 DE DE19605059A patent/DE19605059C1/en not_active Expired - Lifetime
- 1996-07-04 ES ES96110787T patent/ES2141417T3/en not_active Expired - Lifetime
- 1996-07-04 EP EP96110787A patent/EP0755752B1/en not_active Expired - Lifetime
- 1996-07-04 PT PT96110787T patent/PT755752E/en unknown
- 1996-07-04 DE DE59604015T patent/DE59604015D1/en not_active Expired - Fee Related
- 1996-07-18 JP JP8187947A patent/JPH0929600A/en active Pending
- 1996-07-18 US US08/683,217 patent/US5775978A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| PT755752E (en) | 2000-04-28 |
| DE19605059C1 (en) | 1997-07-17 |
| JPH0929600A (en) | 1997-02-04 |
| EP0755752A1 (en) | 1997-01-29 |
| DE19526863A1 (en) | 1997-01-23 |
| DE19526863C2 (en) | 1997-06-12 |
| ES2141417T3 (en) | 2000-03-16 |
| US5775978A (en) | 1998-07-07 |
| DE59604015D1 (en) | 2000-02-03 |
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