EP0802018B1 - Apparatus for grinding an end-face, specially a ring-face, on the edge of a workpiece bore - Google Patents
Apparatus for grinding an end-face, specially a ring-face, on the edge of a workpiece bore Download PDFInfo
- Publication number
- EP0802018B1 EP0802018B1 EP97106045A EP97106045A EP0802018B1 EP 0802018 B1 EP0802018 B1 EP 0802018B1 EP 97106045 A EP97106045 A EP 97106045A EP 97106045 A EP97106045 A EP 97106045A EP 0802018 B1 EP0802018 B1 EP 0802018B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- shaft
- accordance
- grinding
- guide pin
- grinding tool
- 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
- B24B33/00—Honing machines or devices; Accessories therefor
- B24B33/055—Honing machines or devices; Accessories therefor designed for working plane surfaces
-
- 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
- B24B15/00—Machines or devices designed for grinding seat surfaces; Accessories therefor
- B24B15/02—Machines or devices designed for grinding seat surfaces; Accessories therefor in valve housings
-
- 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
- B24B33/02—Honing machines or devices; Accessories therefor designed for working internal surfaces of revolution, e.g. of cylindrical or conical shapes
- B24B33/025—Internal surface of conical shape
Definitions
- the invention relates to a grinding device according to the Preamble of claim 1.
- a known device of this type (DE 44 41 623 A1) is used for fine machining one at the edge of the workpiece bore ground bevel, used as a sealing seat for a valve needle serves.
- Such valve bores are, for example provided in injection pumps for internal combustion engines. she have a very small diameter of only a few millimeters and must be processed with high precision.
- the edge the end face of the hole forming or surrounding it Workpiece must also be machined precisely; when sanding or when machining a chamfer care must also be taken that the frustoconical Surface is exactly concentric to the axis of the hole.
- the well-known Device for surface processing of the chamfer a conical grinding surface on the rotating around the axis of the hole driven grinding tool.
- a lapping machine is described in EP 0 399 088 A2.
- This machine has an eccentric shaft that based on the longitudinal axis of the main shaft is arranged. This axis offset results in a Eccentricity of the lower shaft, so that when the disc arranged at the lower end of the shaft an eccentric path in relation to the axis of rotation, executes.
- Planhon devices are also known in which the Honing tool with its abrasive coating on the one to be machined Surface is moved. These devices are but because of their relatively large dimensions in confined spaces Space cannot be used.
- the invention has for its object the device with the smallest possible space requirement so that also small end faces, especially ring faces on the edge of one Drilled or machined hole with very high accuracy can be.
- the periodic shifting of the grinding tool across The axis of the guide pin enables surface processing the face of the workpiece and also the Create a chamfer on the edge of the hole with a flat Grinding surface, so its shape through wear and dressing is not changed, so that in series production a very high accuracy and quality of the finished surface can be achieved.
- the shifting movement can be narrow Space can be realized, resulting in a small size of the entire device.
- the grinding tool expediently driven in rotation via a drive shaft, for example at 2000 to 6000 rpm
- the periodic shift generated by an eccentric can be, which is preferably part of a driven Hollow shaft with an eccentric bore.
- the hollow shaft in the opposite direction to the drive shaft with a Speed driven from 500 to 2000 rpm.
- the way of The transverse displacement is dimensioned such that the grinding surface has the end face to be machined completely, whereby the distance when processing the surrounding area very thin bores is, for example, 0.5 to 3 mm.
- the device according to FIGS. 1 to 3 has a grinding tool 1, which is designed as a honing stone 3 with an abrasive coating 23 and is attached to a bracket 22.
- the bracket 22 is a cylindrical slide in which parallel to its axis the honing stone 3 is inserted, and in a through opening 21 of a shaft 17 slidably is arranged.
- the shaft 17 is in one piece with a guide pin 7 executed in the finished honed hole 5 of a workpiece 6 is immersed.
- the workpiece 6 is known Way in a holder 8 with gimbal Suspension of the workpiece clamping device arranged, see above that it is on the axis by means of the guide pin 7 2 is aligned, which coincides with the axis of the shaft 17.
- the shaft 17 forms the inner link of a telescopic drive shaft, whose outer tube 10 in a hollow shaft 9 is supported by bearings 11 and 12.
- the shaft 17 is with the outer tube 10 in the direction of rotation of the drive shaft 10, 17 positively connected via a cross bolt 19, which penetrates the shaft 17 and with its ends in one Longitudinal slot 18 of the outer tube 10 is located.
- One inside of the outer tube compression spring 20 loads the Shaft 17 in the direction of the workpiece 6; their bias is adjustable by means of an adjusting screw 30, which in the upper end of the outer tube 10 is inserted.
- the shaft 17 is in the outer tube 10 under load of the compression spring 20th axially displaceable, the displacement path through the Length of the longitudinal slot 18 is limited.
- the drive shaft 10, 17 and the hollow shaft 9 are in opposite directions driven.
- the outer tube 10 of the drive shaft for this purpose at the upper end an external toothing 15, and this upper end lies within a cup-shaped section 13 of the hollow shaft 9, which has an internal toothing there 14 has.
- a drive pinion engages in both toothings 14 and 15 16 a.
- the hollow shaft 9 has a to the common axis 2 of the Shafts and the guide pin eccentric bore 24 inside of its lower section 9a, which is an eccentric forms. 2 and 3 show, the cylindrical Slider 22 in the through hole 21 of the shaft 17 arranged so that it with its two convex End faces 25 flat on the wall 26 of the eccentric bore 24 rests and is thus supported there slidingly.
- the through opening 21 is through one into the guide pin 7 reaching slot 21a keyhole-shaped designed, the slider 22 on the cylindrical wall the passage opening 21 slidably abuts the Honing stone 3 lies within the slot 21a (Fig. 2).
- the Area of the guide pin 7 protrudes the honing stone 3 with the Grinding pad 23 at both ends of the slot 21a after outside (Fig. 1).
- the abrasive coating 23 can therefore with his Grinding surface 23a, the end face 4 to be machined Paint over workpiece 6 completely.
- the hollow shaft 9 is dash-dotted by means of bearings 27 indicated device carrier 28 stored, the on - not shown - guides axially in the direction of the workpiece 6 is deliverable.
- the carrier 28 and the Holding device 8 aligned so that the guide pin 7 is coaxial to the workpiece bore 5.
- the Carrier 28 is then advanced in the direction of workpiece 6, the guide pin 7 in the workpiece bore 5 dips, which are pre-processed by honing or finished is.
- the gimbal is aimed Workpiece 6 exactly on axis 2, which then with the bore axis coincides.
- the guide pin 7 can be coated with a wear-resistant covering or also Have guide strips 29, which are made of wear-resistant Material, such as hard metal.
- the delivery can depend on the route and in a known manner can also be controlled depending on the force, one gradual or continuous delivery is possible. Shortly before the abrasive coating 23 of the honing stone 3 with the ring surface 4 of the workpiece comes into contact, the opposite Rotational movements of the drive shaft 10, 17 and Hollow shaft 9 initiated via the drive pinion 16. Therefor the delivery movement can be slowed down or briefly interrupted become. With further delivery, the Grinding surface 23a of the abrasive coating 23 on the workpiece surface 4, which then by rotating movement and at the same time about radial, periodic movements of the Tool 1 is processed.
- the rotation is from the drive shaft 10, 17 generated and the displacement movement of the eccentric 9a of the hollow shaft 9, the slide 22 with its end faces 25 on the wall 26 of the eccentric bore 24 slides and together with the honing stone 3 in the Through opening 21, 21a periodically in opposite directions radially to the axis 2 is moved.
- the grinding surface 23a sweeps over the entire workpiece ring surface 4th
- the delivery movement is stopped as soon as the Grinding surface 23 of the honing stone 3 under the pressure of the spring 20 with a predetermined machining force on the workpiece surface 4 is present.
- the machining force to be specified can be set by specifying the delivery route, or - at continuous infeed - by adjusting the spring force by means of the set screw 30. To switch off the infeed when the specified gauge block is reached known ones Path and / or force measuring devices are provided his.
- a grinding tool 1 ' is provided with which at the edge of the workpiece bore 5, a chamfer in the form of a conical ring surface 4 'is ground.
- the chamfer 4 ' can by means of the grinding tool 1 'by removing the edge of the bore be generated; but it can also be the surface of an existing, previously created chamfer Finished dimensionally and precisely concentric to axis 2 become.
- the grinding tool 1 ' consists of one with an abrasive coating 23 'provided honing stone 3', which corresponds to the 2 is inserted into a slide 22 '.
- a through opening 21 'of the shaft 17 extends also up to the guide pin 7, but runs with its central axis 21A of the upper region obliquely to the axis 2 of the guide pin 7.
- the cylindrical slide 22 ' is accordingly arranged obliquely in the shaft 17 so that its convex end faces 25 'in axial section accordingly are beveled.
- the central axis of the slider 22 ' coincides with the axis 21A of the through opening, and the grinding surface 23a 'of the grinding pad 23' lies parallel to this axis 21A.
- the angle between the Grinding surface 23a 'and axis 2 correspond to the target angle the bevel 4 '.
- the honing stone 3 ' is dimensioned in this way and arranged on the slide 22 'that they are partially up extends into the workpiece bore 5 and during the and sliding movements of the tool 1 'the conical ring surface or chamfer 4 'completely swept.
- the turning and Sliding movements are as described using the drive shaft and the outer hollow shaft 9 generated.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Geometry (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 eine Schleifvorrichtung nach dem
Oberbegriff des Anspruches 1.The invention relates to a grinding device according to the
Preamble of
Eine bekannte Vorrichtung dieser Art (DE 44 41 623 A1) dient zur Feinbearbeitung einer am Rand der Werkstück-Bohrung angeschliffenen Fase, die als Dichtsitz für eine Ventilnadel dient. Solche Ventilbohrungen sind beispielsweise in Einspritzpumpen für Brennkraftmaschinen vorgesehen. Sie haben einen sehr kleinen Durchmesser von nur einigen Millimetern und müssen hochgenau bearbeitet sein. Die den Rand der Bohrung bildende oder ihn umgebende Stirnfläche des Werkstückes muß ebenfalls genau bearbeitet sein; beim Anschleifen oder bei der Oberflächenbearbeitung einer Fase ist außerdem darauf zu achten, daß die kegelstumpfförmige Fläche genau konzentrisch zur Bohrungsachse liegt. Die bekannte Vorrichtung hat zur Oberflächenbearbeitung der Fase eine konische Schleiffläche an dem um die Bohrungsachse rotierend angetriebenen Schleifwerkzeug. Dabei ist die Form der Fase unmittelbar von der Form der Schleiffläche des Schleifbelages abhängig, der in der Serienfertigung häufig abgerichtet werden muß. Da Schleifbeläge allgemein inhomogen sind, ist die Formgenauigkeit und die Oberflächenqualität der Fase in der Serienfertigung bei sehr hohen Anforderungen unzureichend.A known device of this type (DE 44 41 623 A1) is used for fine machining one at the edge of the workpiece bore ground bevel, used as a sealing seat for a valve needle serves. Such valve bores are, for example provided in injection pumps for internal combustion engines. she have a very small diameter of only a few millimeters and must be processed with high precision. The edge the end face of the hole forming or surrounding it Workpiece must also be machined precisely; when sanding or when machining a chamfer care must also be taken that the frustoconical Surface is exactly concentric to the axis of the hole. The well-known Device for surface processing of the chamfer a conical grinding surface on the rotating around the axis of the hole driven grinding tool. Here is the form the chamfer directly from the shape of the grinding surface of the Depending on the abrasive surface, which is common in series production must be dressed. Because grinding pads are generally inhomogeneous are the shape accuracy and the surface quality the chamfer in series production with very high requirements insufficient.
In der EP 0 399 088 A2 ist eine Läppmaschine beschrieben. Diese Maschine umfaßt einen exzentrischen Schaft, der bezogen auf die Längsachse des Hauptschaftes achsversetzt angeordnet ist. Durch diesen Achsenversatz ergibt sich eine Exzentrizität des unteren Schaftes, so daß bei Bewegung der am unteren Ende des Schaftes angeordneten Scheibe diese eine exzentrische Bahn, bezogen auf die Rotationsachse, ausführt.A lapping machine is described in EP 0 399 088 A2. This machine has an eccentric shaft that based on the longitudinal axis of the main shaft is arranged. This axis offset results in a Eccentricity of the lower shaft, so that when the disc arranged at the lower end of the shaft an eccentric path in relation to the axis of rotation, executes.
Es sind auch Planhonvorrichtungen bekannt, bei denen das Honwerkzeug mit seinem Schleifbelag auf der zu bearbeitenden Oberfläche verschoben wird. Diese Vorrichtungen sind aber wegen ihrer relativ großen Abmessungen bei beengten Platzverhältnissen nicht einsetzbar.Planhon devices are also known in which the Honing tool with its abrasive coating on the one to be machined Surface is moved. These devices are but because of their relatively large dimensions in confined spaces Space cannot be used.
Der Erfindung liegt die Aufgabe zugrunde, die Vorrichtung mit möglichst geringem Platzbedarf so auszuführen, daß auch kleine Stirnflächen, insbesondere Ringflächen am Rand einer Bohrung mit sehr hoher Genauigkeit erzeugt oder bearbeitet werden können.The invention has for its object the device with the smallest possible space requirement so that also small end faces, especially ring faces on the edge of one Drilled or machined hole with very high accuracy can be.
Die Aufgabe wird gemäß der Erfindung mit den Merkmalen des
Anspruches 1 gelöst.The object is achieved according to the invention with the features of
Das periodische Verschieben des Schleifwerkzeuges quer zur Achse des Führungszapfens ermöglicht die Oberflächenbearbeitung der Stirnfläche des Werkstückes und auch die Erzeugung einer Fase an der Bohrungskante mit einer planen Schleiffläche, deren Form also durch Abnutzung und Abrichten nicht verändert wird, so daß in der Serienfertigung eine sehr hohe Genauigkeit und Güte der fertigen Oberfläche erreicht werden. Die Verschiebebewegung kann auf engstem Raum realisiert werden, womit sich eine geringe Baugröße der gesamten Vorrichtung ergibt.The periodic shifting of the grinding tool across The axis of the guide pin enables surface processing the face of the workpiece and also the Create a chamfer on the edge of the hole with a flat Grinding surface, so its shape through wear and dressing is not changed, so that in series production a very high accuracy and quality of the finished surface can be achieved. The shifting movement can be narrow Space can be realized, resulting in a small size of the entire device.
Während der Verschiebebewegung wird das Schleifwerkzeug zweckmäßig über eine Antriebswelle rotierend angetrieben, beispielsweise mit 2000 bis 6000 U/min, wobei die periodische Verschiebung mittels eines Exzenters erzeugt werden kann, der vorzugsweise Bestandteil einer angetriebenen Hohlwelle mit Exzenterbohrung ist. Vorzugsweise wird die Hohlwelle gegensinnig zu der Antriebswelle mit einer Drehzahl von 500 bis 2000 U/min angetrieben. Der Weg der Querverschiebung ist so bemessen, daß die Schleiffläche die zu bearbeitende Stirnfläche vollständig überstreicht, wobei die Wegstrecke bei der Bearbeitung des Umgebungsbereichs sehr dünner Bohrungen beispielsweise 0,5 bis 3 mm beträgt.During the shifting movement, the grinding tool expediently driven in rotation via a drive shaft, for example at 2000 to 6000 rpm, the periodic shift generated by an eccentric can be, which is preferably part of a driven Hollow shaft with an eccentric bore. Preferably the hollow shaft in the opposite direction to the drive shaft with a Speed driven from 500 to 2000 rpm. The way of The transverse displacement is dimensioned such that the grinding surface has the end face to be machined completely, whereby the distance when processing the surrounding area very thin bores is, for example, 0.5 to 3 mm.
Ausgestaltungen der Erfindung ergeben sich aus den Unteransprüchen.Embodiments of the invention result from the subclaims.
Zwei Ausführungsformen der erfindungsgemäßen Schleifvorrichtung werden im folgenden anhand der Zeichnungen näher erläutert. Es zeigen
- Fig. 1
- die Schleifvorrichtung mit einer zugehörigen Haltevorrichtung für das Werkstück im Axialschnitt,
- Fig. 2
- einen Schnitt nach II-II in Fig. 1,
- Fig. 3
- einen Schnitt nach III-III in Fig. 2,
- Fig. 4
- einen ausschnittsweisen Axialschnitt durch die Vorrichtung und ein zu bearbeitendes Werkstück mit einer anderen Ausbildung und Lagerung des Werkzeuges in schematischer Darstellung.
- Fig. 1
- the grinding device with an associated holding device for the workpiece in axial section,
- Fig. 2
- 2 shows a section according to II-II in FIG. 1,
- Fig. 3
- 2 shows a section according to III-III in FIG. 2,
- Fig. 4
- a partial axial section through the device and a workpiece to be machined with a different design and storage of the tool in a schematic representation.
Die Vorrichtung nach den Fig. 1 bis 3 hat ein Schleifwerkzeug
1, das als Honleiste 3 mit einem Schleifbelag 23 ausgeführt
und an einer Halterung 22 befestigt ist. Die Halterung
22 ist ein zylindrischer Schieber, in den parallel
zu seiner Achse die Honleiste 3 eingesetzt ist, und der in
einer Durchgangsöffnung 21 eines Schaftes 17 verschieblich
angeordnet ist. Der Schaft 17 ist einstückig mit einem Führungszapfen
7 ausgeführt, der in die fertig gehonte Bohrung
5 eines Werkstückes 6 eintaucht. Das Werkstück 6 ist in bekannter
Weise in einer Haltevorrichtung 8 mit kardanischer
Aufhängung der Werkstück-Spannvorrichtung angeordnet, so
daß es mittels des Führungszapfens 7 genau auf dessen Achse
2 ausgerichtet wird, die mit der Achse des Schaftes 17 zusammenfällt.
Der Schaft 17 bildet das Innenglied einer Teleskop-Antriebswelle,
deren Außenrohr 10 in einer Hohlwelle
9 mittels Lagern 11 und 12 abgestützt ist. Der Schaft 17
ist mit dem Außenrohr 10 in Drehrichtung der Antriebswelle
10, 17 formschlüssig über einen Querbolzen 19 verbunden,
der den Schaft 17 durchsetzt und mit seinen Enden in einem
Längsschlitz 18 des Außenrohres 10 liegt. Eine innerhalb
des Außenrohres befindliche Druckfeder 20 belastet den
Schaft 17 in Richtung auf das Werkstück 6; ihre Vorspannung
ist mittels einer Stellschraube 30 einstellbar, die in das
obere Ende des Außenrohres 10 eingesetzt ist. Der Schaft 17
ist in dem Außenrohr 10 unter Belastung der Druckfeder 20
axial verschieblich, wobei der Verschiebeweg durch die
Länge des Längsschlitzes 18 begrenzt ist.The device according to FIGS. 1 to 3 has a
Die Antriebswelle 10, 17 und die Hohlwelle 9 werden gegensinnig
angetrieben. Das Außenrohr 10 der Antriebswelle hat
zu diesem Zweck am oberen Ende eine Außenverzahnung 15, und
dieses obere Ende liegt innerhalb eines napfförmigen Abschnittes
13 der Hohlwelle 9, die dort eine Innenverzahnung
14 aufweist. In beide Verzahnungen 14 und 15 greift ein Antriebsritzel
16 ein.The
Die Hohlwelle 9 hat eine zu der gemeinsamen Achse 2 der
Wellen und des Führungszapfens exzentrische Bohrung 24 innerhalb
ihres unteren Abschnittes 9a, der damit einen Exzenter
bildet. Wie die Fig. 2 und 3 zeigen, ist der zylindrische
Schieber 22 in der Durchgangsöffnung 21 des Schaftes
17 so angeordnet, daß er mit seinen beiden konvexen
Stirnflächen 25 flächig an der Wandung 26 der Exzenterbohrung
24 anliegt und damit dort gleitend abgestützt ist.
Die Durchgangsöffnung 21 ist durch einen bis in den Führungszapfen
7 reichenden Schlitz 21a schlüssellochförmig
gestaltet, wobei der Schieber 22 an der zylindrischen Wandung
der Durchlaßöffnung 21 gleitend anliegt, während die
Honleiste 3 innerhalb des Schlitzes 21a liegt (Fig. 2). Im
Bereich des Führungszapfens 7 ragt die Honleiste 3 mit dem
Schleifbelag 23 an beiden Enden des Schlitzes 21a nach
außen (Fig. 1). Der Schleifbelag 23 kann darum mit seiner
Schleiffläche 23a die zu bearbeitende Stirnfläche 4 des
Werkstückes 6 vollständig überstreichen.The
Die Hohlwelle 9 ist mittels Lagern 27 in einem strichpunktiert
angedeuteten Vorrichtungsträger 28 gelagert, der
an - nicht dargestellten - Führungen axial in Richtung auf
das Werkstück 6 zustellbar ist.The
Vor Beginn der Bearbeitung werden der Träger 28 und die
Haltevorrichtung 8 so zueinander ausgerichtet, daß der Führungszapfen
7 koaxial zu der Werkstückbohrung 5 steht. Der
Träger 28 wird dann in Richtung auf das Werkstück 6 zugestellt,
wobei der Führungszapfen 7 in die Werkstückbohrung
5 eintaucht, die durch Honen vorbearbeitet oder fertigbearbeitet
ist. Dabei richtet sich das kardanisch gehalterte
Werkstück 6 genau auf die Achse 2 aus, die dann mit
der Bohrungsachse zusammenfällt. Der Führungszapfen 7 kann
mit einem verschleißfesten Belag beschichtet sein oder auch
Führungsleisten 29 aufweisen, die aus verschleißfestem
Werkstoff, beispielsweise Hartmetall bestehen.Before processing begins, the
Die Zustellung kann in bekannter Weise wegeabhängig und
auch zusätzlich kraftabhängig gesteuert werden, wobei eine
stufenweise oder stetige Zustellung möglich ist. Kurz bevor
der Schleifbelag 23 der Honleiste 3 mit der Ringfläche 4
des Werkstückes in Berührung kommt, werden die gegenläufigen
Drehbewegungen der Antriebswelle 10, 17 und der
Hohlwelle 9 über das Antriebsritzel 16 eingeleitet. Hierfür
kann die Zustellbewegung verlangsamt oder kurzzeitig unterbrochen
werden. Bei weiterer Zustellung legt sich die
Schleiffläche 23a des Schleifbelages 23 an die Werkstückfläche
4 an, die dann durch rotierende Bewegung und zugleich
etwa radiale, periodische Verschiebebewegungen des
Werkzeuges 1 bearbeitet wird. Die Rotation wird von der Antriebswelle
10, 17 erzeugt und die Verschiebebewegung von
dem Exzenter 9a der Hohlwelle 9, wobei der Schieber 22 mit
seinen Stirnflächen 25 an der Wandung 26 der Exzenterbohrung
24 gleitet und zusammen mit der Honleiste 3 in der
Durchgangsöffnung 21, 21a radial zur Achse 2 periodisch gegenläufig
verschoben wird. Mit dieser kombinierten Bewegung
überstreicht die Schleiffläche 23a die gesamte Werkstück-Ringfläche
4.The delivery can depend on the route and in a known manner
can also be controlled depending on the force, one
gradual or continuous delivery is possible. Shortly before
the
Während der Bearbeitung wird infolge der weiteren, stetigen
oder schrittweisen Zustellung die Druckfeder 20 zunehmend
gespannt. Die Zustellbewegung wird gestoppt, sobald der
Schleifbelag 23 der Honleiste 3 unter dem Druck der Feder
20 mit einer vorgegebenen Bearbeitungskraft an der Werkstückfläche
4 anliegt. Die vorzugebende Bearbeitungskraft
ist durch Vorgabe des Zustellweges einstellbar, oder - bei
kontinuierlicher Zustellung - durch Einstellung der Federkraft
mittels der Stellschraube 30. Zum Abschalten der Zustellung
bei Erreichen des vorgegebenen Endmaßes können bekannte
Wege- und/oder Kraft-Meßeinrichtungen vorgesehen
sein. As a result of the further, steady
or step by step the
Fig. 4 zeigt die Vorrichtung im Bereich der Bearbeitungszone
in einem vergrößerten Teil-Axialschnitt. Bei dieser
Ausführung ist ein Schleifwerkzeug 1' vorgesehen, mit dem
an der Kante der Werkstückbohrung 5 eine Fase in Form einer
konischen Ringfläche 4' geschliffen wird. Die Fase 4' kann
mittels des Schleifwerkzeuges 1' durch Abtragen der Bohrungskante
erzeugt werden; es kann aber auch die Oberfläche
einer bereits vorhandenen, vorher erzeugten Fase auf genaues
Maß und genau konzentrisch zur Achse 2 fertigbearbeitet
werden.4 shows the device in the area of the processing zone
in an enlarged partial axial section. At this
Execution, a grinding tool 1 'is provided with which
at the edge of the workpiece bore 5, a chamfer in the form of a
conical ring surface 4 'is ground. The chamfer 4 'can
by means of the grinding tool 1 'by removing the edge of the bore
be generated; but it can also be the surface
of an existing, previously created chamfer
Finished dimensionally and precisely concentric to
Das Schleifwerkzeug 1' besteht aus einer mit einem Schleifbelag
23' versehenen Honleiste 3', die entsprechend der
Darstellung in Fig. 2 in einen Schieber 22' eingesetzt ist.
Eine Durchgangsöffnung 21' des Schaftes 17 erstreckt sich
ebenfalls bis in den Führungszapfen 7, verläuft aber mit
ihrer Mittelachse 21A des oberen Bereiches schräg zur Achse
2 des Führungszapfens 7. Der zylindrische Schieber 22' ist
dementsprechend schräg in dem Schaft 17 angeordnet, so daß
seine konvexen Stirnflächen 25' im Axialschnitt entsprechend
abgeschrägt sind. Die Mittelachse des Schiebers
22' fällt mit der Achse 21A der Durchgangsöffnung zusammen,
und die Schleiffläche 23a' des Schleifbelages 23' liegt
parallel zu dieser Achse 21A. Der Winkel zwischen der
Schleiffläche 23a' und der Achse 2 entspricht dem Sollwinkel
der Fase 4'. Die Honleiste 3' ist derart dimensioniert
und am Schieber 22' angeordnet, daß sie sich zum Teil bis
in die Werkstückbohrung 5 erstreckt und während der Dreh-
und Schiebebewegungen des Werkzeuges 1' die konische Ringfläche
bzw. Fase 4' vollständig überstreicht. Die Dreh- und
Schiebebewegungen werden wie beschrieben mittels der Antriebswelle
und der äußeren Hohlwelle 9 erzeugt.The grinding tool 1 'consists of one with an abrasive coating
23 'provided honing stone 3', which corresponds to the
2 is inserted into a slide 22 '.
A through opening 21 'of the
Claims (15)
- A device for grinding an end face, in particular a ring face, on the edge of a hole in a work piece with a driven grinding tool (1) with a grinding surface which is set at an angle to the axis (2) of a guide pin (7) which is dimensioned to fit exactly into the machined, for example honed, hole and is connected to the grinding tool (1),
characterised in that the grinding tool (1) is made up of at least one honing strip (3) which is positioned in a hole (21) through the shaft (17) and can periodically be moved at an angle to the axis (2) of the guide pin by means of an excenter (9a). - A device in accordance with Claim 1,
characterised in that the guide pin (7) is positioned flush with a drive shaft (10, 17) by means of which the grinding tool (1) is driven by rotation. - A device in accordance with Claim 1 or 2,
characterised in that the excenter (9a) is part of a driven hollow shaft (9) with an excentric hole (24) in which a holder (22) for the grinding tool (1) is supported at an angle to the axis of the hollow shaft (9) in such a manner that it can be moved. - A device in accordance with Claim 2 or 3,
characterised in that the shaft (17) is the inner member of the drive shaft (10, 17) which is designed as a telescopic shaft, the outer sleeve (10) of which is driven, it being possible to move the shaft (17) axially to a limited extent inside the outer sleeve (10) of the drive shaft (10, 17). - A device in accordance with Claim 4,
characterised in that the shaft (17) is inserted in an elongated slit (18) in the outer sleeve (10) of the drive shaft (10, 17) by means of a transverse bolt (19) which passes through the shaft (17) and forms a positive connection between the shaft (17) and the outer sleeve (10) in the direction of rotation of the drive shaft (10, 17). - A device in accordance with one of Claims 1 to 5,
characterised in that the grinding tool (1) can be fed towards the work piece (6). - A device in accordance with one of Claims 1 to 6,
characterised in that the shaft (17) is spring loaded in relation to the work piece (6), preferably by means of a compression spring (20) which can be adjustably pre-tensioned by means of a set screw (30). - A device in accordance with one of Claims 1 to 7,
characterised in that the shaft (10) and the guide pin (7) are designed as one piece. - A device in accordance with one of Claims 3 to 8,
characterised in that the holder (22) for the grinding tool (1) is a preferably cylindrical bar the ends (25) of which are convex and are supported in such a manner that they can slide along the wall (26) of the excenter hole (24). - A device in accordance with one of Claims 1 to 9,
characterised in that the grinding tool (1) which comprises at least one honing strip (3) is a surface honing tool with the honing strip (3) having a grinding wheel (23) which forms the grinding surface (23a). - A device in accordance with Claim 10,
characterised in that the opening (21) through the shaft (17) is designed in an approximate keyhole shape to take the honing strip (3) and its holding device (22) with a slit (21a) which extends to the guide pin (7) and from which the honing strip (3) and its grinding wheel (23) protrude at at least one end of the slit. - A device in accordance with one of Claims 2 to 10,
characterised in that the drive shaft (10, 17) is supported in the hollow shaft (9) which has an excentric hole (24) and is driven in an opposite direction to it, with the drive shaft (10, 17) preferably having a section with a set of outer toothing (15) which lies in an section (13) of the hollow shaft (9) with a set of inner toothing, and that a drive pinion (16) engages with both sets of toothing (14 and 15). - A device in accordance with one of Claims 1 to 12,
characterised in that the grinding device has a holding device (8) with a gimbal-mounted holding device for the work piece (6). - A device in accordance with one of Claims 1 to 13,
characterised in that the guide pin (7) has at least one guide strip (29) to rest against the wall of the hole in the work piece. - A device in accordance with one of Claims 1 to 14,
characterised in that the flat grinding surface (23a) of the grinding tool (1) can be moved vertically to the axis (2) of the guide pin (7) or that the flat grinding surface (23a) of the grinding tool (1) can be moved at an angle to the axis (2) of the guide pin (7) which is the same as the reference angle of a bezel on the edge of the hole in the work piece.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE29607203U | 1996-04-20 | ||
| DE29607203U DE29607203U1 (en) | 1996-04-20 | 1996-04-20 | Device for grinding an end face, in particular an annular surface, on the edge of a workpiece bore |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0802018A1 EP0802018A1 (en) | 1997-10-22 |
| EP0802018B1 true EP0802018B1 (en) | 2000-07-19 |
Family
ID=8022876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97106045A Expired - Lifetime EP0802018B1 (en) | 1996-04-20 | 1997-04-12 | Apparatus for grinding an end-face, specially a ring-face, on the edge of a workpiece bore |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US6267653B1 (en) |
| EP (1) | EP0802018B1 (en) |
| JP (1) | JP3749777B2 (en) |
| DE (2) | DE29607203U1 (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE512250C2 (en) | 1998-07-10 | 2000-02-21 | Lidkoeping Machine Tools Ab | Abrasive machine for machining the end surface of a workpiece |
| PL192478B1 (en) * | 1999-07-29 | 2006-10-31 | Prochniewicz Zbigniew | Toolhead in particular that for machining valve seat in cylinder heads of internal combustion engines |
| DE20311716U1 (en) | 2003-07-30 | 2003-10-30 | Hans Joachim Sauer (GmbH & Co), 22339 Hamburg | Grinding or milling tool, for machining flat sealing surface at bottom of cylindrical bore, has knob at top and fits inside sleeve with knob at top and has guide rod extending through central through bore |
| DE102006012516A1 (en) * | 2006-03-18 | 2007-09-20 | Bayerische Motoren Werke Ag | Tight chamfer processing tool for use in automobile industry, has cutting head axially movable relative to housing against spring force of elastic unit that absorbs force developed during processing of tight chamfer in axial direction |
| JP4990643B2 (en) * | 2007-02-13 | 2012-08-01 | トーヨーエイテック株式会社 | Honing machine |
| US7861738B2 (en) * | 2008-03-04 | 2011-01-04 | Caterpillar Inc. | Remanufactured machine component and remanufacturing process |
| ES2332568B1 (en) * | 2008-07-23 | 2011-04-18 | Airbus Operations, S.L. | POST-SHAVED ORBITAL REACHING SYSTEM OF RIVETS. |
| JP5078971B2 (en) * | 2009-11-13 | 2012-11-21 | 株式会社フジエ | Surface processing work tool unit |
| CN102601729B (en) * | 2012-03-28 | 2016-08-17 | 常州博瑞油泵油嘴有限公司 | Needle-valve body class part axial elasticity precise positioning clamping device |
| CN102601730B (en) * | 2012-03-28 | 2016-08-17 | 常州博瑞油泵油嘴有限公司 | High pressure common rail injector needle-valve body precise positioning clamping device |
| CN115256211A (en) * | 2022-08-17 | 2022-11-01 | 江苏威马悦达智能装备有限公司 | Honing cutter special for valve body parts and assembling method thereof |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2226207A (en) * | 1938-07-22 | 1940-12-24 | Nomar Louis Nolan | Magazine rifle |
| US2443489A (en) * | 1946-05-06 | 1948-06-15 | Weynand Paul | Grinding tool |
| US2525119A (en) * | 1947-04-09 | 1950-10-10 | S & D Engineering Company | Valve-seat grinding means |
| US2754642A (en) * | 1952-05-14 | 1956-07-17 | Soulet Armand | Carrier for grindwheels for the truing of valve seats |
| US2809482A (en) * | 1953-04-10 | 1957-10-15 | Soulet Armand | Valve seat grinder |
| US2769287A (en) * | 1955-08-31 | 1956-11-06 | Tobin Arp Mfg Company | Valve seat grinder |
| US4467566A (en) * | 1982-01-29 | 1984-08-28 | Sunnen Products Company | Valve seat grinding device and tool for using same |
| JPS59182055A (en) * | 1983-03-31 | 1984-10-16 | Japan Electronic Control Syst Co Ltd | Method of grinding valve-seat surface |
| DE3627541A1 (en) * | 1986-08-13 | 1988-02-18 | Gehring Gmbh Maschf | Grinding device |
| ES2017547A6 (en) * | 1989-05-24 | 1991-02-16 | Suarez Menendez Alfredo | Lapping machine. |
| DE4441623C2 (en) * | 1993-12-15 | 1997-08-28 | Kopp Kadia Maschinenbau | Method and tool for grinding a chamfer at the start of a hole |
-
1996
- 1996-04-20 DE DE29607203U patent/DE29607203U1/en not_active Expired - Lifetime
-
1997
- 1997-04-12 EP EP97106045A patent/EP0802018B1/en not_active Expired - Lifetime
- 1997-04-12 DE DE59702039T patent/DE59702039D1/en not_active Expired - Lifetime
- 1997-04-18 US US08/844,706 patent/US6267653B1/en not_active Expired - Fee Related
- 1997-04-18 JP JP10198597A patent/JP3749777B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| EP0802018A1 (en) | 1997-10-22 |
| JPH1044010A (en) | 1998-02-17 |
| DE59702039D1 (en) | 2000-08-24 |
| DE29607203U1 (en) | 1997-08-14 |
| US6267653B1 (en) | 2001-07-31 |
| JP3749777B2 (en) | 2006-03-01 |
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