EP0176654A2 - Method and device for high-speed profile grinding of dynamically balanced workpieces - Google Patents

Method and device for high-speed profile grinding of dynamically balanced workpieces Download PDF

Info

Publication number
EP0176654A2
EP0176654A2 EP85102261A EP85102261A EP0176654A2 EP 0176654 A2 EP0176654 A2 EP 0176654A2 EP 85102261 A EP85102261 A EP 85102261A EP 85102261 A EP85102261 A EP 85102261A EP 0176654 A2 EP0176654 A2 EP 0176654A2
Authority
EP
European Patent Office
Prior art keywords
workpiece
grinding wheel
grinding
ground
axis
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.)
Granted
Application number
EP85102261A
Other languages
German (de)
French (fr)
Other versions
EP0176654A3 (en
EP0176654B1 (en
Inventor
Erwin Junker
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE3435313A external-priority patent/DE3435313C2/en
Application filed by Individual filed Critical Individual
Priority to AT85102261T priority Critical patent/ATE78204T1/en
Publication of EP0176654A2 publication Critical patent/EP0176654A2/en
Publication of EP0176654A3 publication Critical patent/EP0176654A3/en
Application granted granted Critical
Publication of EP0176654B1 publication Critical patent/EP0176654B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor

Definitions

  • the invention relates to a method and a device for high-speed profile grinding of rotationally symmetrical workpieces clamped in a grinding machine so as to be rotatable about their longitudinal axis, a grinding wheel being advanced along the axis of rotation of the workpiece and being radially adjusted according to the peripheral profile to be ground.
  • grinding wheels have been used for profile grinding of rotating bodies, the contour of which corresponds to the profile to be ground. Grinding disks that are as wide as the profile have the disadvantage that they grind the workpiece under so-called "line contact” and correspondingly high radial forces, with the result that the coolant does not have an optimal effect.
  • work is generally carried out at relatively low cutting speeds because of the large mass of such a grinding wheel. This results in a relatively long machining time, which increases the workpiece costs accordingly.
  • the object on which the invention is based is to provide a method and a device for high-speed cylindrical or rotary grinding of rotationally symmetrical workpieces which are clamped about their longitudinal axis, each workpiece being able to be ground gently in the shortest possible time and, on the other hand, the grinding wheel successively lengthwise in layers their circumference can wear evenly.
  • This object is achieved in a method of the type outlined above in such a way that the grinding wheel grinding on the end face is guided against the workpiece surface to be machined with an essentially flat surface line in such a way that the grinding wheel during the grinding process only reaches the circumference of the workpiece in the area of its finished (smallest) diameter touches a point on the perpendicular to the longitudinal axis of the workpiece, the surface line of the grinding wheel including the ground workpiece surface at a clearance angle so that the adjacent finished ground surface is no longer covered by the grinding wheel.
  • the grinding machine for performing this method with a rotationally symmetrical workpiece clamped with its two ends in a holder and a grinding wheel carried and driven by a grinding spindle, which can be moved along the axis of rotation of the workpiece and in accordance with the desired grinding Profile of the grinding piece is radially adjustable, is designed so that the grinding wheel has a substantially flat surface line and that the grinding wheel is arranged obliquely with respect to the workpiece.
  • This arrangement is expediently created in that the grinding wheel jacket is cylindrical and the axis of the grinding wheel forms an angle greater than 0 with the longitudinal axis of the workpiece.
  • the axes of the grinding wheel, which has a conical outer surface, and of the workpiece are advantageously arranged skew to one another.
  • the arrangement can also be such that the grinding spindle axis is pivoted and adjusted horizontally and vertically with respect to the longitudinal axis of the workpiece.
  • the expression "essentially flat lateral surface" is also intended to include the surfaces which run in a straight line or have a large radius.
  • the main advantage of this proposal according to the invention is that, while reducing the tool costs, the grinding time is reduced considerably with very little heat generation. Apart from the fact that heat build-up in the workpiece is avoided, because when using a flat grinding wheel it is possible to cool down much more concentrated than previously possible, the workpiece does not become ex exposed to radial grinding pressures because, firstly, the active area of the grinding wheel engaged with the workpiece per unit of time is relatively small and, moreover, a substantial part of the grinding pressures is transmitted in the axial direction.
  • a polishing grinding device for round symmetrical and asymmetrical thin-walled workpieces is described, which is characterized in that its movement components correspond approximately to those of a hand grinding polishing, i.e. that is, the workpiece continuously performs an oscillating pivoting movement when the direction of advance of the polishing device changes.
  • a hand grinding polishing i.e. that is, the workpiece continuously performs an oscillating pivoting movement when the direction of advance of the polishing device changes.
  • an inclination from the polishing grinding wheel to the workpiece axis is specified, this inclination obviously only meaning that the workpiece can be polished as intensely as by hand.
  • This publication does not provide any information on creating a clearance angle between a grinding wheel working on the end face and the workpiece and on successively uniform wear of the grinding wheel without having to constantly dress.
  • FIG. 1 shows a rotationally symmetrical rotating body, namely a workpiece 1, on which a grinding body in the form of a narrow grinding wheel 2 engages.
  • the axis of rotation 2a of this grinding wheel 2 is pivoted horizontally by an angle ⁇ against the workpiece longitudinal axis 4.
  • a further twist angle ⁇ is given by vertical pivoting of the grinding wheel axis of rotation 2a against the workpiece axis 4. The inclination of the grinding wheel to the workpiece during grinding is explained more clearly below with reference to FIGS. 3 and 4.
  • the grinding wheel 1 which has a substantially flat lateral surface, engages at an angle on the circumference of the workpiece, from which a certain part of the circumference is to be ground in accordance with the grinding wheel s.
  • an inclined surface F is formed, with which the grinding wheel engages the part L of the workpiece to be removed, while due to the special arrangement of the grinding wheel relative to the workpiece, a clearance angle (not shown) between the straight jacket line 11 of the grinding wheel and the finished ground peripheral surface U of the workpiece 1 is present, so that once the circumference U has been completely ground, it does not come into contact with the grinding wheel. While a considerable part of the pressure of the grinding wheel is derived in the axial direction via the line L according to FIG.
  • the radially directed grinding force component acts on the workpiece only at the point which is denoted by 1a in FIGS. 6 to 8.
  • the end face F migrates during the further grinding against the feed direction of the grinding wheel towards the free edge of the wheel, as illustrated in FIG. 4, in which the grinding wheel is already 80% worn in the form of a layer.
  • the oblique face of the grinding wheel is labeled F1.
  • FIGS. 6 to 8 schematically show a simplified representation of the wear of the grinding wheel, in which the clearance angle shown between the straight surface line M of the grinding wheel 2 and the circumferential line U of the workpiece 1 of the diameter of the workpiece 1 that has already been ground is not shown.
  • the grinding wheel 2 acts with its oblique face F against the processing layer B of the workpiece 1 in accordance with the desired grinding depth S.
  • the arrows indicate the radial infeed and the axial movement of the grinding wheel 2 indicated relative to the workpiece 1.
  • the grinding process according to FIGS. 6 to 8 not only is the diameter of the workpiece 1 reduced by twice the grinding depth, but the grinding wheel 2 gradually wears out during the grinding process in the form of a layer which corresponds to the grinding depth S.
  • the wear of the grinding wheel thus takes place uniformly in the form of a layer S corresponding to the grinding depth, so that as long as this layer has not yet been completely removed, the grinding wheel does not need to be refurbished or reloaded.
  • FIG. 5 One possibility of profile grinding is shown in FIG. 5, in which the skewed arrangement of grinding wheel axis of rotation 2a and workpiece longitudinal axis 4 is emphasized.
  • a grinding machine numerically controlled via a programmable computer is used, the axial feed of the grinding wheel and its radial feed also being controlled by a computer program.
  • This enables a very precise guidance of the grinding wheel in accordance with the desired profile, so that the profile shown as an exemplary embodiment in FIG. 5 can be worked on the workpiece circumference in a technically not complex manner.

Abstract

In a method and a device for high-speed profile grinding of rotating, clamped, dynamically balanced workpieces, a grinding wheel with a generating line running essentially in a planar manner is guided towards the workpiece surface to be machined in such a way that the grinding wheel, during the grinding operation, touches the workpiece periphery in the area of its finished diameter merely at a point lying on the normal to the longitudinal axis of the workpiece, the generating line of the grinding wheel enclosing a clearance angle with the peripheral line of the ground workpiece surface. <IMAGE>

Description

Die Erfindung betrifft ein Verfahren und eine Vorrichtung zum Hochgeschwindigkeits-Profilschleifen von in einer Schleifmaschine um ihre Längsachse drehbar eingespannten rotationssymmetrischen Werkstücken, wobei eine Schleifscheibe längs der Drehachse des Werkstückes vorgeschoben und entsprechend dem zu schleifenden Umfangsprofil radial verstellt wird.The invention relates to a method and a device for high-speed profile grinding of rotationally symmetrical workpieces clamped in a grinding machine so as to be rotatable about their longitudinal axis, a grinding wheel being advanced along the axis of rotation of the workpiece and being radially adjusted according to the peripheral profile to be ground.

Beim Profilschleifen von drehkörpern werden bisher Schleifscheiben eingesetzt, deren Kontur dem zu schleifenden Profil entspricht. Schleifscheiben, die so breit wie das Profil sind, haben den Nachteil, daß sie das Werkstück unter sogenannter "Linienberührung" und entsprechend hohen Radialkräften beschleifen, was zur Folge hat, daß das Kühlmittel nicht optimal zur Wirkung kommt. Um die Erwärmung vom Werkstück in Grenzen zu halten, wird im allgemeinen auch wegen der großen Masse einer solchen Schleifscheibe mit relativ niedrigen Schnittgeschwindigkeiten gearbeitet. Dies hat eine relativ lange Bearbeitungsdauer zur Folge, welche die Werkstückkosten entsprechend erhöht.So far, grinding wheels have been used for profile grinding of rotating bodies, the contour of which corresponds to the profile to be ground. Grinding disks that are as wide as the profile have the disadvantage that they grind the workpiece under so-called "line contact" and correspondingly high radial forces, with the result that the coolant does not have an optimal effect. In order to keep the heating of the workpiece within limits, work is generally carried out at relatively low cutting speeds because of the large mass of such a grinding wheel. This results in a relatively long machining time, which increases the workpiece costs accordingly.

Die der Erfindung zugrundeliegende Aufgabe besteht darin, ein Verfahren und eine Vorrichtung zum Hochgeschwindigkeits-Rund- bzw. Drehschleifen von rotationssymmetrischen, um ihre Längsachse drehbar eingespannten Werkstücken anzugeben, wobei jedes Werkstück schonend in kürzester Zeit geschliffen werden kann und sich andererseits die Schleifscheibe schichtweise sukzessiv längs ihres Umfangs gleichmäßig abnutzen kann.The object on which the invention is based is to provide a method and a device for high-speed cylindrical or rotary grinding of rotationally symmetrical workpieces which are clamped about their longitudinal axis, each workpiece being able to be ground gently in the shortest possible time and, on the other hand, the grinding wheel successively lengthwise in layers their circumference can wear evenly.

Diese Aufgabe wird bei einem Verfahren der oben umrissenen Art so gelöst, daß die stirnseitig schleifende Schleifscheibe mit einer im wesentlichen ebenen Mantellinie so gegen die zu bearbeitende Werkstückfläche geführt wird, daß die Schleifscheibe beim Schleifvorgang den Werkstückumfang im Bereich seines fertigen (geringsten) Durchmessers lediglich in einen auf der Senkrechten zur Werkstücklängsachse liegenden Punkt berührt, wobei die Mantellinie der Schleifscheibe mit der geschliffenen Werkstückfläche einen Freiwinkel einschließt, so daß die angrenzende fertig geschliffene Fläche nicht weiter von der Schleifscheibe erfaßt wird.This object is achieved in a method of the type outlined above in such a way that the grinding wheel grinding on the end face is guided against the workpiece surface to be machined with an essentially flat surface line in such a way that the grinding wheel during the grinding process only reaches the circumference of the workpiece in the area of its finished (smallest) diameter touches a point on the perpendicular to the longitudinal axis of the workpiece, the surface line of the grinding wheel including the ground workpiece surface at a clearance angle so that the adjacent finished ground surface is no longer covered by the grinding wheel.

Die Schleifmaschine zur Durchführung dieses Verfahrens mit einem mit seinen beiden Enden drehbaren in einen Halter eingespannten rotationssymmetrischen Werkstück und einer von einer Schleifspindel getragenen und angetriebenen Schleifscheibe, welche längs der Drehachse des Werkstückes verschiebbar und entsprechend dem gewünschten zu schleifenden Profil des Schleifstückes radial verstellbar ist, ist so ausgebildet, daß die Schleifscheibe eine im wesentlichen ebene Mantellinie aufweist und daß die Schleifscheibe in Bezug'auf das Werkstück schief angeordnet ist.The grinding machine for performing this method with a rotationally symmetrical workpiece clamped with its two ends in a holder and a grinding wheel carried and driven by a grinding spindle, which can be moved along the axis of rotation of the workpiece and in accordance with the desired grinding Profile of the grinding piece is radially adjustable, is designed so that the grinding wheel has a substantially flat surface line and that the grinding wheel is arranged obliquely with respect to the workpiece.

Zweckmäßig ist diese Anordnung dadurch geschaffen, daß der Schleifscheibenmantel zylindrisch ist und die Achse der Schleifscheibe mit der Werkstücklängsachse einen Winkel größer als 0 einschließt.This arrangement is expediently created in that the grinding wheel jacket is cylindrical and the axis of the grinding wheel forms an angle greater than 0 with the longitudinal axis of the workpiece.

Vorteilhaft sind die Achsen der eine konische Mantelfläche aufweisenden Schleifscheibe und des Werkstückes windschief zueinander angeordnet. Dabei kann die Anordnung auch so getroffen sein, daß die Schleifspindelachse gegenüber der Werkstücklängsachse horizontal und vertikal geschwenkt und eingestellt ist. Unter dem Ausdruck "im wesentlichen ebene Mantelfläche" sollen auch die Flächen fallen, welche geradlinig verlaufen oder einen großen Radius aufweisen.The axes of the grinding wheel, which has a conical outer surface, and of the workpiece are advantageously arranged skew to one another. The arrangement can also be such that the grinding spindle axis is pivoted and adjusted horizontally and vertically with respect to the longitudinal axis of the workpiece. The expression "essentially flat lateral surface" is also intended to include the surfaces which run in a straight line or have a large radius.

Der wesentliche Vorteil dieses erfindungsgemäßen Vorschlages besteht darin, daß unter Senkung der Werkzeugkosten eine erhebliche Verkürzung der Schleifzeit bei sehr geringer Wärmeentwicklung erfolgt. Abgesehen davon, daß eine Wärmestauung im Werkstück vermieden wird, weil bei Verwendung einer flachen Schleifscheibe wesentlich konzentrierter als bislang möglich abgekühlt werden kann, wird das Werkstück keinen extremen radialen Schleifdrücken ausgesetzt, weil erstens die jeweils pro Zeiteinheit mit dem Werkstück in eingriff stehende aktive Fläche der Schleifscheibe relativ gering ist und darüber hinaus ein wesentlicher Teil der Schleifdrücke in Achsrichtung übertragen wird. Deshalb kann mit relativ hohen Schnittgeschwindigkeiten gearbeitet werden, weil im Gegensatz zum herkömmlichen Schleifen die Kräfte, die rechtwinklig zur Achse wirken, nur einen Bruchteil ausmachen und diese Kräfte in einem Punkt des Werkstückumfanges wirken, der auf der Senkrechten zur Werkstücklängsachse liegt. Ein weiterer Vorteil besteht darin, daß sich die Schleifscheibe nach einer Seite hin in Form einer dünnen Schicht gleichmäßig abnutzt. Es läßt sich also mathematisch feststellen, wann vom Schleifscheibenumfang eine Schicht abgetragen worden ist, damit sie anschließend nachgerichtet werden kann. Für den Fall, daß der Schleifkörper mit einem Borazon-Belag versehen ist, ist die Standzeit wesentlich erhöht.The main advantage of this proposal according to the invention is that, while reducing the tool costs, the grinding time is reduced considerably with very little heat generation. Apart from the fact that heat build-up in the workpiece is avoided, because when using a flat grinding wheel it is possible to cool down much more concentrated than previously possible, the workpiece does not become ex exposed to radial grinding pressures because, firstly, the active area of the grinding wheel engaged with the workpiece per unit of time is relatively small and, moreover, a substantial part of the grinding pressures is transmitted in the axial direction. It is therefore possible to work with relatively high cutting speeds because, in contrast to conventional grinding, the forces that act perpendicular to the axis only make up a fraction and these forces act at a point on the workpiece circumference that is perpendicular to the longitudinal axis of the workpiece. Another advantage is that the grinding wheel wears evenly towards one side in the form of a thin layer. It can thus be determined mathematically when a layer has been removed from the circumference of the grinding wheel so that it can subsequently be adjusted. In the event that the grinding tool is provided with a Borazon coating, the service life is significantly increased.

Aufgrund der schiefen bzw. windschiefen Anordnung von Schleifscheibe zu dem zu bearbeitenden Werkstück ergibt sich zwischen Mantellinie und Umfangslinie des Werkstückes ein Freiwinkel, der bewirkt, daß die Schleifscheibe nur an der vorgesehenen Stelle auf das Werkstück einwirkt, ansonsten jedoch Platz gelassen wird, so daß die Schleifscheibe beim weiteren Schleifvorgang nicht noch einmal das fertige Profil beschleifen kann. Während also erfindungsgemäß entsprechend der gewünschten Zustelltiefe die Schleifscheibe mit einer schrägen Stirnfläche am Werkstück angreift, der abschließende Durchmesser des Werkstückes von der Schleifscheibe jedoch lediglich durch Punktberührung geschliffen wird, ist nach "Fertigungstechnik und Betrieb" Nr. 23, Heft 3, 1973, S.166-171 die Schleifanordnung so getroffen, daß die Schleifscheibenachse und die Werkzeugachse parallel in einer Ebene liegen und die Schleifscheibe mit zwei Mantellinien.an dem Werkstück angreift.Due to the inclined or skewed arrangement of the grinding wheel to the workpiece to be machined, there is a clearance angle between the surface line and the circumferential line of the workpiece, which means that the grinding wheel only acts on the workpiece at the intended location, but is otherwise left space, so that the Grinding wheel cannot grind the finished profile again during the further grinding process. So while according to the desired depth of feed the grinding wheel with a attacks the oblique face on the workpiece, but the final diameter of the workpiece is ground from the grinding wheel only by point contact, according to "Manufacturing Technology and Operation" No. 23, Issue 3, 1973, pp. 166-171 the grinding arrangement is such that the grinding wheel axis and the tool axis lie parallel in one plane and the grinding wheel engages the workpiece with two surface lines.

In der DDR-PS 29 342 ist eine Polierschleifeinrichtung für runde symmetrische und asymmetrische dünnwandige Werkstücke beschrieben, die sich dadurch auszeichnet, daß sie in ihren Bewegungskomponenten annähernd denen einer Handschleifpolierung entspricht, d.h. also das Werkstück führt laufend eine pendelnde Schwenkbewegung bei Änderung der Vorschubrichtung der Poliervorrichtung aus. In dieser Druckschrift ist zwar eine Schrägstellung von Polierschleifscheibe zu Werkstückachse angegeben, wobei diese Schrägstellung offensichtlich nur die Bedeutung hat, daß das Werkstück genau so intensiv wie von Hand poliert werden kann. Zur Schaffung eines Freiwinkels zwischen einer stirnseitig arbeitenden Schleifscheibe und dem Werkstück und zur sukzessiven gleichmäßigen Abnutzung der Schleifscheibe, ohne dauernd abrichten zu müssen, gibt diese Druckschrift keinen Hinweis.In the GDR-PS 29 342 a polishing grinding device for round symmetrical and asymmetrical thin-walled workpieces is described, which is characterized in that its movement components correspond approximately to those of a hand grinding polishing, i.e. that is, the workpiece continuously performs an oscillating pivoting movement when the direction of advance of the polishing device changes. In this publication, an inclination from the polishing grinding wheel to the workpiece axis is specified, this inclination obviously only meaning that the workpiece can be polished as intensely as by hand. This publication does not provide any information on creating a clearance angle between a grinding wheel working on the end face and the workpiece and on successively uniform wear of the grinding wheel without having to constantly dress.

Die Erfindung wird nachfolgend an einem Ausführungsbeispiel anhand der beigefügten Zeichnung näher erläutert.The invention is explained in more detail using an exemplary embodiment with reference to the accompanying drawings.

In der Zeichnung zeigen:

  • Fig. 1 schematisch eine Draufsicht auf die Anordnung eines Schleifkörpers zum Werkstück, wobei die Schleifkörperdrehadhse gegen die Werkstücklängsachse horizontal geschwenkt ist,
  • Fig. 2 eine Vorderansicht der in Fig. 1 gezeigten Anordnung, wobei die Schleifscheibenachse vertikal gegen die Werkstücklängsachse geschwenkt ist,
  • Fig. 3 eine vergrößerte Teilansicht nach Fig. 1 mit zu 10% abgenutzter Schleifscheibe,
  • Fig. 4 eine der Fig. 3 ähnliche Ansicht, wobei der Abnutzungsgrad der Schleifscheibe höher ist,
  • Fig. 5 schematisch eine an einem rotationssymmetrischen werkstück angesetzte Schleifscheibe,
  • Fig. 6 bis 8 verschiedene schematische Darstellungen in Draufsicht, in denen die Abnutzungsweise der Schleifscheibe gezeigt ist,
  • Fig. 9 eine Teilansicht von Werkstück und Schleifscheibe, wobei ein Freiwinkel α sich durch Schrägstellung der Schleifscheibe zum rotationssymmetrischen Werkstück ergibt,
  • Fig. 10 eine Frontansicht von Werkstück und Scheibe entsprechend Pfeil A in Fig. 9
The drawing shows:
  • 1 schematically shows a plan view of the arrangement of a grinding wheel relative to the workpiece, the grinding wheel rotation axis being pivoted horizontally against the longitudinal axis of the workpiece,
  • 2 is a front view of the arrangement shown in FIG. 1, the grinding wheel axis being pivoted vertically against the longitudinal axis of the workpiece,
  • 3 is an enlarged partial view of FIG. 1 with a grinding wheel worn to 10%,
  • 4 is a view similar to FIG. 3, the degree of wear of the grinding wheel being higher,
  • 5 schematically shows a grinding wheel attached to a rotationally symmetrical workpiece,
  • 6 to 8 different schematic representations in plan view, in which the manner of wear of the grinding wheel is shown,
  • Fig. 9 is a partial view of the workpiece and grinding wheel, with a clearance angle α If the grinding wheel is inclined to the rotationally symmetrical workpiece,
  • 10 is a front view of the workpiece and disc according to arrow A in FIG .. 9

In Fig. 1 ist ein rotationssymmetrischer Drehkörper, nämlich ein Werkstück 1 gezeigt, an welchem ein Schleifkörper in der Form einer schmalen Schleifscheibe 2 angreift. Die Rotationsachse 2a dieser Schleifscheibe 2 ist gegen die Werkstücklängsachse 4 um einen Winkel ß horizontal geschwenkt. In Fig. 2 ist erkennbar, daß durch Vertikalschwenkung der Schleifscheibendrehachse 2a gegen die Werkstückachse 4 ein weiterer Verschränkungswinkel α gegeben ist. Die Schrägstellung von Schleifscheibe zu Werkstück während des Schleifens wird nachfolgend anhand Fig. 3 und 4 deutlicher erläutert.1 shows a rotationally symmetrical rotating body, namely a workpiece 1, on which a grinding body in the form of a narrow grinding wheel 2 engages. The axis of rotation 2a of this grinding wheel 2 is pivoted horizontally by an angle β against the workpiece longitudinal axis 4. In Fig. 2 it can be seen that a further twist angle α is given by vertical pivoting of the grinding wheel axis of rotation 2a against the workpiece axis 4. The inclination of the grinding wheel to the workpiece during grinding is explained more clearly below with reference to FIGS. 3 and 4.

Nach Fig. 3 und 4 greift die Schleifscheibe 1, welche eine im wesentlichen ebene Mantelfläche aufweist, in einem Winkel an dem Umfang des Werkstückes an, von welchem entsprechend der Schleifscheibe s ein bestimmter Teil des Umfanges abgeschliffen werden soll. Zu Beginn bildet sich eine Schrägfläche F aus, mit welcher die Schleifscheibe an dem abzutragenden Teil L des Werkstückes angreift, während aufgrund der besonderen Anordnung der Schleifscheibe zum Werkstück ein (nicht gezeigter erkennbarer) Freiwinkel zwischen der geraden Mantellinie 11 der Schleifscheibe und der fertig geschliffenen Umfangsfläche U des Werkstückes 1 vorhanden ist, so daß, wenn der Umfang U einmal fertig geschliffen ist, er nicht weiter mit der Schleifscheibe in Berührung kommt. Während hier ein beträchtlicher Teil des Druckes der Schleifscheibe über die Linie L nach Fig. 3 in Achsrichtung abgeleitet wird, wirkt die radial gerichtete Schleifkraftkomponente lediglich in dem Punkt auf das Werkstück ein, welcher in Fig. 6 bis 8 mit 1a bezeichnet ist. Die Stirnfläche F wandert während des weiteren Schleifens entgegen der Vorschubrichtung der Schleifscheibe zum freien Rand der Scheibe hin, wie dies in Fig. 4 veranschaulicht ist, in welcher die Schleifscheibe bereits zu 80% in Form einer Schicht abgenutzt ist. In Fig.4 ist die schräge Stirnfläche der Schleifscheibe mit F1 bezeichnet.3 and 4, the grinding wheel 1, which has a substantially flat lateral surface, engages at an angle on the circumference of the workpiece, from which a certain part of the circumference is to be ground in accordance with the grinding wheel s. At the beginning, an inclined surface F is formed, with which the grinding wheel engages the part L of the workpiece to be removed, while due to the special arrangement of the grinding wheel relative to the workpiece, a clearance angle (not shown) between the straight jacket line 11 of the grinding wheel and the finished ground peripheral surface U of the workpiece 1 is present, so that once the circumference U has been completely ground, it does not come into contact with the grinding wheel. While a considerable part of the pressure of the grinding wheel is derived in the axial direction via the line L according to FIG. 3, the radially directed grinding force component acts on the workpiece only at the point which is denoted by 1a in FIGS. 6 to 8. The end face F migrates during the further grinding against the feed direction of the grinding wheel towards the free edge of the wheel, as illustrated in FIG. 4, in which the grinding wheel is already 80% worn in the form of a layer. In Figure 4, the oblique face of the grinding wheel is labeled F1.

In Fig. 6 bis 8 ist schematisch eine vereinfachte Darstellung der Abnutzung der Schleifscheibe wiedergegeben, in welcher der zwischen der geraden Mantellinie M der Schleifscheibe 2 und der Umfangslinie U des Werkstückes 1 des bereits fertig geschliffenen Durchmessers des Werkstückes 1 abgebildete Freiwinkel nicht gezeigt ist. Nach Fig. 6 wirkt die Schleifscheibe 2 mit ihrer schrägen Stirnfläche F gegen die Bearbeitungsschicht B des Werkstückes 1 entsprechend der gewünschten Schleiftiefe S. Mit den Pfeilen ist die radiale Zustellung und die Axialbewegung der Schleifscheibe 2 gegenüber dem Werkstück 1 angedeutet. Bei dem Schleifvorgang nach Fig. 6 bis 8 wird jedoch nicht nur der Durchmesser des Werkstückes 1 um die doppelte Schleiftiefe verringert, sondern die Schleifscheibe 2 nutzt sich während des Schleifvorganges sukzessiv in Form einer Schicht ab, die der Schleiftiefe S entspricht. Beim Schleifen selbst wirkt ein erheblicher Teil der Schleifdrücke in axialer Richtung, während die Radialkomponente dieser Kräfte von der Schleifscheibe 2 auf das Werkstück 1 lediglich in dem Punkt 1a übertragen wird. Die Schleifscheibe 2 weist also an der Stelle 1a mit dem Werkstück eine Punktberührung auf, so daß das Werkstück selbst keinen wesentlichen radialen Druckkräften ausgesetzt ist. Dieser Punkt 1a liegt auf einer Senkrechten zur Werkstücklängsachse an der Stelle, an welcher das Werkstück 1 von der Scheibe gerade fertiggeschliffen wird. In dem gezeigten Ausführungsbeispiel ist dies die Umfangslinie U in Fig. 7, während der Umfangsabschnitt U1 (Fig. 6) des Werkstückes 1 noch abzuschleifen ist. Die Abnutzung der Schleifscheibe erfolgt also gleichmäßig in Form einer der Schleiftiefe entsprechenden Schicht S, so daß so lange, wie diese Schicht noch nicht vollständig abgetragen ist, die Schleifscheibe auch nicht nachgerichtet oder neu zugestellt zu werden braucht. Unter Bezugnahme auf Fig. 3 und 4 bedeutet dies also, daß so lange ein Abschnitt X1 bzw. X2 der Mantelfläche der Schleifscheibe zum Schleifvorgang zur Verfügung steht, im Gegensatz zu bisherigen Schleifverfahren nicht dauernd abgerichtet werden muß.6 to 8 schematically show a simplified representation of the wear of the grinding wheel, in which the clearance angle shown between the straight surface line M of the grinding wheel 2 and the circumferential line U of the workpiece 1 of the diameter of the workpiece 1 that has already been ground is not shown. According to FIG. 6, the grinding wheel 2 acts with its oblique face F against the processing layer B of the workpiece 1 in accordance with the desired grinding depth S. The arrows indicate the radial infeed and the axial movement of the grinding wheel 2 indicated relative to the workpiece 1. In the grinding process according to FIGS. 6 to 8, not only is the diameter of the workpiece 1 reduced by twice the grinding depth, but the grinding wheel 2 gradually wears out during the grinding process in the form of a layer which corresponds to the grinding depth S. When grinding itself, a significant part of the grinding pressures acts in the axial direction, while the radial component of these forces is transmitted from the grinding wheel 2 to the workpiece 1 only at point 1a. The grinding wheel 2 therefore has point contact with the workpiece at point 1a, so that the workpiece itself is not exposed to any significant radial pressure forces. This point 1a lies on a perpendicular to the longitudinal axis of the workpiece at the point at which the workpiece 1 is being finish-ground by the wheel. In the exemplary embodiment shown, this is the peripheral line U in FIG. 7, while the peripheral section U1 (FIG. 6) of the workpiece 1 is still to be ground. The wear of the grinding wheel thus takes place uniformly in the form of a layer S corresponding to the grinding depth, so that as long as this layer has not yet been completely removed, the grinding wheel does not need to be refurbished or reloaded. With reference to FIGS. 3 and 4, this means that a section X1 or X2 of the outer surface of the grinding wheel for the grinding process for Ver is available, in contrast to previous grinding processes, does not have to be continuously dressed.

Mit dem erfindungsgemäßen Vorschlag ist ein sehr schonendes Hochgeschwindigkeits-Profilschleifen von Werkstücken möglich, weil im Gegensatz zu bekannten Rundschleifverfahren, bei denen die Kräfte zu über 90% im rechten Winkel zur Werkstückachse einwirken, die Radialkräfte aufgrund der Punktberührung von Schleifscheibe 2 und Werkstück 1 im Punkt 1a lediglich über diesen Punkt zur Einwirkung gelangen, während der Hauptteil der Kraft aufgrund der schrägen Stirnfläche in Achsrichtung übertragen wird.With the proposal according to the invention, a very gentle high-speed profile grinding of workpieces is possible because, in contrast to known cylindrical grinding processes, in which the forces act at more than 90% at right angles to the workpiece axis, the radial forces due to the point contact of grinding wheel 2 and workpiece 1 at the point 1a only act via this point, while the main part of the force is transmitted in the axial direction due to the inclined end face.

In Fig. 9 und 10 ist die vereinfachte Anordnung von Schleifscheibe zu Werkstück gezeigt, wobei nach Fig. 9 der Freiwinkel α eingezeichnet ist, so daß der im Bereich des fertigen Durchmessers des Werkstückes 1 liegende Teil der Schleifscheibe nicht mehr mit der schon beschliffenen Fläche in Eingriff gelangen kann. Auch hier ist deutlich gezeigt, wie sich die Schleifscheibe 2 längs ihrer schrägen Stirnfläche gleichmäßig in Form einer Schicht abnutzt, wenn sie in Richtung des in Fig. 9 gezeigten Pfeiles gegen das sich drehende Werkstück bewegt wird.9 and 10, the simplified arrangement of grinding wheel to workpiece is shown, with the clearance angle α being shown in FIG. 9, so that the part of the grinding wheel lying in the area of the finished diameter of the workpiece 1 is no longer with the surface already ground in Intervention can occur. Here, too, it is clearly shown how the grinding wheel 2 wears uniformly in the form of a layer along its inclined end face when it is moved in the direction of the arrow shown in FIG. 9 against the rotating workpiece.

Bei der Darstellung nach Fig. 10 ist deutlich erkennbar, daß die Schleifscheibe 2 den fertigen Durchmesser (Umfangslinie U) fertig arbeitet, indem sie nur über den Punkt 1a auf das Werkstück einwirkt, während die übrige Schleifkraft über die schräge Stirnfläche F der Scheibe gegen den noch abzutragenden Umfang des Werkstückes wirkt.10 it can be clearly seen that the grinding wheel 2 is working the finished diameter (circumferential line U) by only using the Point 1a acts on the workpiece, while the remaining grinding force acts on the inclined end face F of the disc against the circumference of the workpiece which is still to be removed.

Eine Möglichkeit eines Profilschleifens ist in Fig. 5 gezeigt, bei welcher die windschiefe Anordnung von Schleifkörperdrehachse 2a und Werkstücklängsachse 4 hervorgehoben ist. Hier wird eine über einen programmierbaren Computer numerisch gesteuerte Schleifmaschine verwendet, wobei der axiale Vorschub der Schleifscheibe und deren radiale Zustellung ebenfalls durch ein Computerprogramm gesteuert werden. Dadurch wird eine sehr präzise Führung der Schleifscheibe nach Maßgabe des gewünschten Profils ermöglicht, so daß auf technisch nicht aufwendige Weise das als Ausführungsbeispiel in Fig. 5 gezeigte Profil am Werkstückumfang gearbeitet werden kann.One possibility of profile grinding is shown in FIG. 5, in which the skewed arrangement of grinding wheel axis of rotation 2a and workpiece longitudinal axis 4 is emphasized. Here a grinding machine numerically controlled via a programmable computer is used, the axial feed of the grinding wheel and its radial feed also being controlled by a computer program. This enables a very precise guidance of the grinding wheel in accordance with the desired profile, so that the profile shown as an exemplary embodiment in FIG. 5 can be worked on the workpiece circumference in a technically not complex manner.

Die erzielbaren Vorteile lassen sich folgendermaßen zusammenfassen:

  • 1) Kurze Schleifzeit (ca. 1o-25%);
  • 2) geringe Wärmeentwicklung;
  • 3) hohe Drehzahl des Werkstückes möglich;
  • 4) hohe Schleifscheibendrehgeschwindigkeit möglich;
  • 5) relativ schmale Schleifscheibe.
The achievable advantages can be summarized as follows:
  • 1) Short grinding time (approx. 1o-25%);
  • 2) low heat generation;
  • 3) high speed of the workpiece possible;
  • 4) high grinding wheel rotation speed possible;
  • 5) relatively narrow grinding wheel.

Claims (4)

1. Verfahren zum Hochgeschwindigkeits-Profilschleifen von in einer Schleifmaschine um ihre Längsachse drehbar eingespannten rotationssymmetrischen Werkstücken, wobei eine Schleifscheibe längs der Drehachse des Werkstückes vorgeschoben und entsprechend dem zu schleifenden Umfangsprofil radial verstellt wird, dadurch gekennzeichnet, daß die stirnseitig schleifende Schleifscheibe mit einer im wesentlichen eben verlaufenden Mantellinie so gegen die zu bearbeitende Werkstückfläche geführt wird, daß die Schleifscheibe beim Schleifvorgang den Werkstückumfang im Bereich seines fertigen Durchmessers lediglich in einem auf der Senkrechten zur Werkstücklängsachse liegenden Punkt berührt, und daß die Mantellinie der Schleifscheibe mit der Umfangslinie der geschliffenen Werkstückfläche einen Freiwinkel einschließt, so daß die angrenzende fertig geschliffene Fläche nicht weiter von der Schleifscheibe erfaßt wird.1. A method for high-speed profile grinding of rotationally symmetrical workpieces clamped in a grinding machine rotatably about its longitudinal axis, a grinding wheel being advanced along the axis of rotation of the workpiece and being adjusted radially in accordance with the peripheral profile to be ground, characterized in that the grinding wheel grinding on the end face with an essentially flat surface line is guided against the workpiece surface to be machined so that the grinding wheel during the grinding process the workpiece circumference in the area of its finished diameter only in a perpendicular to the longitudinal axis of the workpiece touched point, and that the surface line of the grinding wheel includes a clearance angle with the circumferential line of the ground workpiece surface, so that the adjacent finished ground surface is no longer covered by the grinding wheel. 2. Schleifmaschine zur Durchführung des Verfahrens nach Anspruch 1 mit einem mit seinen beiden Enden drehbaren in einem Halter eingespannten rotationssymmetrischen Werkstück und einer von einer Schleifspindel getragenen und angetriebenen Schleifscheibe, welche längs der Drehachse des Werkstückes verschiebbar und entsprechend dem gewünschten zu schleifenden Profil des Schleifstückes radial verstellbar ist, dadurch gekennzeichnet, daß die Schleifscheibe (2) eine im wesentlichen ebene Mantellinie (11) aufweist, und daß die Schleifscheibe (2) in Bezug auf das Werkstück (1) schief angeordnet ist.2. Grinding machine for carrying out the method according to claim 1 with a rotationally symmetrical workpiece clamped with its two ends rotatable in a holder and a grinding wheel carried and driven by a grinding spindle, which can be displaced along the axis of rotation of the workpiece and radially in accordance with the desired profile of the contact piece to be ground is adjustable, characterized in that the grinding wheel (2) has a substantially flat surface line (11) and that the grinding wheel (2) is arranged obliquely with respect to the workpiece (1). 3. Schleifmaschine nach Anspruch 2, dadurch gekennzeichnet, daß der Schleifscheibenmantel (11) zylindrisch ist und die Achse (2a) der Schleifscheibe (2) mit der Werkstücklängsachse (4) einen Winkel größer als Null einschließt.3. Grinding machine according to claim 2, characterized in that the grinding wheel jacket (11) is cylindrical and the axis (2a) of the grinding wheel (2) with the workpiece longitudinal axis (4) encloses an angle greater than zero. 4. Schleifscheibe nach Anspruch 2 oder 3, dadurch gekennzeichnet , daß die Achsen der eine konische Mantelfläche aufweisenden Schleifscheibe (2) und des Werkstückes (1) windschief zueinander angeordnet sind.4. Grinding wheel according to claim 2 or 3, characterized in that the axes of the grinding wheel having a conical outer surface (2) and the workpiece (1) are arranged skew to one another.
EP85102261A 1984-09-26 1985-02-28 Method and device for high-speed profile grinding of dynamically balanced workpieces Expired - Lifetime EP0176654B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85102261T ATE78204T1 (en) 1984-09-26 1985-02-28 METHOD AND DEVICE FOR HIGH-SPEED PROFILE GRINDING OF ROTATIONALLY SYMMETRIC WORKPIECES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3435313 1984-09-26
DE3435313A DE3435313C2 (en) 1984-03-15 1984-09-26 Device for external cylindrical grinding

Publications (3)

Publication Number Publication Date
EP0176654A2 true EP0176654A2 (en) 1986-04-09
EP0176654A3 EP0176654A3 (en) 1987-09-09
EP0176654B1 EP0176654B1 (en) 1992-07-15

Family

ID=6246408

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85102261A Expired - Lifetime EP0176654B1 (en) 1984-09-26 1985-02-28 Method and device for high-speed profile grinding of dynamically balanced workpieces

Country Status (7)

Country Link
EP (1) EP0176654B1 (en)
AT (1) ATE78204T1 (en)
BR (1) BR8501203A (en)
CS (1) CS272205B2 (en)
DD (1) DD232863A5 (en)
ES (1) ES8605705A1 (en)
SU (1) SU1452466A3 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2225264A (en) * 1987-09-17 1990-05-30 Erwin Junker Internal grinding
EP0346425B1 (en) * 1987-12-23 1994-05-18 Fortuna-Werke Maschinenfabrik GmbH Process for dressing a grinding wheel
CN102756308A (en) * 2012-06-29 2012-10-31 重庆恒博机械制造有限公司 Grinding machine for slender shaft workpieces

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1394704A (en) * 1918-12-10 1921-10-25 Walter C Barnhart Pulley-grinding machine
US1968550A (en) * 1930-05-28 1934-07-31 Black Rock Mfg Company Rubber roller grinding machine
GB692686A (en) * 1951-02-12 1953-06-10 Crucible Steel Co America Improvements in or relating to a gauge adjusting and regulating apparatus for grinding and polishing machines
GB986427A (en) * 1961-07-13 1965-03-17 Eugene Fouquet High-performance grinding process, more particularly for the machining of metals of all degrees of hardness
GB991213A (en) * 1963-03-07 1965-05-05 Crabtree & Co Ltd J A Improvements in the grinding of metal surfaces
DE1269002B (en) * 1965-09-22 1968-05-22 Polysius Gmbh Device for regrinding of out-of-round race rings of all kinds of rotary drums
FR2049226A5 (en) * 1969-06-04 1971-03-26 Inst Sverkltvlrdykh
US3881887A (en) * 1973-12-19 1975-05-06 Mcmaster Harold Apparatus and method for grinding an elongated workpiece
JPS5656371A (en) * 1979-10-15 1981-05-18 Osaka Fuji Kogyo Kk Method of grinding inside surface of mold
SU852502A1 (en) * 1978-05-17 1981-08-07 Ленинградский Технологический Институтцеллюлозно-Бумажной Промышленности Machine for grinding surface of roll barrel
DE3009294A1 (en) * 1980-03-11 1981-09-17 Fa. Gottlieb Gühring, 7470 Ebingen Needle shaped boss prodn. on workpiece - involves progressive single pass grinding operation with axial motion
US4306382A (en) * 1979-05-25 1981-12-22 Ueda Giken Co. Ltd. Grinding machine

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1394704A (en) * 1918-12-10 1921-10-25 Walter C Barnhart Pulley-grinding machine
US1968550A (en) * 1930-05-28 1934-07-31 Black Rock Mfg Company Rubber roller grinding machine
GB692686A (en) * 1951-02-12 1953-06-10 Crucible Steel Co America Improvements in or relating to a gauge adjusting and regulating apparatus for grinding and polishing machines
GB986427A (en) * 1961-07-13 1965-03-17 Eugene Fouquet High-performance grinding process, more particularly for the machining of metals of all degrees of hardness
GB991213A (en) * 1963-03-07 1965-05-05 Crabtree & Co Ltd J A Improvements in the grinding of metal surfaces
DE1269002B (en) * 1965-09-22 1968-05-22 Polysius Gmbh Device for regrinding of out-of-round race rings of all kinds of rotary drums
FR2049226A5 (en) * 1969-06-04 1971-03-26 Inst Sverkltvlrdykh
US3881887A (en) * 1973-12-19 1975-05-06 Mcmaster Harold Apparatus and method for grinding an elongated workpiece
SU852502A1 (en) * 1978-05-17 1981-08-07 Ленинградский Технологический Институтцеллюлозно-Бумажной Промышленности Machine for grinding surface of roll barrel
US4306382A (en) * 1979-05-25 1981-12-22 Ueda Giken Co. Ltd. Grinding machine
JPS5656371A (en) * 1979-10-15 1981-05-18 Osaka Fuji Kogyo Kk Method of grinding inside surface of mold
DE3009294A1 (en) * 1980-03-11 1981-09-17 Fa. Gottlieb Gühring, 7470 Ebingen Needle shaped boss prodn. on workpiece - involves progressive single pass grinding operation with axial motion

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Band 5, Nr. 116 (M-80)[788], 25. Juli 1981; & JP-A-56 56 371 (OSAKA FUJI KOGYO K.K.) 18-05-1981 *
SOVIET INVENTIONS ILLUSTRATED, Woche E21, P61 G 2242 E/21, 7. Juli 1982; & SU-A-852 502 *
THE TOOL AND MANUFACTURING ENGINEER, Band 4, Oktober 1966, Seite 16; "40% Cost savings deburring pump rotors with OSBORN power brushing" *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2225264A (en) * 1987-09-17 1990-05-30 Erwin Junker Internal grinding
GB2225264B (en) * 1987-09-17 1992-09-09 Erwin Junker Apparatus for internal grinding
EP0346425B1 (en) * 1987-12-23 1994-05-18 Fortuna-Werke Maschinenfabrik GmbH Process for dressing a grinding wheel
CN102756308A (en) * 2012-06-29 2012-10-31 重庆恒博机械制造有限公司 Grinding machine for slender shaft workpieces

Also Published As

Publication number Publication date
EP0176654A3 (en) 1987-09-09
ATE78204T1 (en) 1992-08-15
ES541094A0 (en) 1986-04-16
SU1452466A3 (en) 1989-01-15
ES8605705A1 (en) 1986-04-16
BR8501203A (en) 1985-11-12
DD232863A5 (en) 1986-02-12
CS175585A2 (en) 1985-08-15
EP0176654B1 (en) 1992-07-15
CS272205B2 (en) 1991-01-15

Similar Documents

Publication Publication Date Title
DE3435313C2 (en) Device for external cylindrical grinding
DE19529786C1 (en) Method and tool for producing a concave surface on a lens blank
EP1597020B1 (en) Cylindrical grinding method for producing hard metal tools and cylindrical grinding machine for grinding cylindrical starting bodies during the production of hard metal tools
EP1834731B1 (en) Process of grinding cutting tools
DE10234707A1 (en) Method and device for grinding a rotationally symmetrical machine component
EP2823924A2 (en) Double dressing unit
EP1427568A1 (en) Method and device for grinding central bearing positions on crankshafts
DE4103090C1 (en)
EP0772509A1 (en) Process and device for grinding cams with concave flanks
EP2046528A1 (en) Method of grinding an indexable insert and grinding wheel for carrying out the grinding method
DE4107462C2 (en) Machine tool for machining workpieces
EP0625406B1 (en) Method for working the surface of elastomeres
EP0176654B1 (en) Method and device for high-speed profile grinding of dynamically balanced workpieces
CH685544A5 (en) A method of circumferential and Chamfer grinding of cutting plates and apparatus for carrying out the method.
DE3811782C2 (en)
DE69935216T2 (en) Method and device for grinding curved surfaces
DE678981C (en) Method for grinding camshafts
DE10113301B4 (en) Method and device for back grinding of the cutting teeth of cylindrical or conically shaped Abfalzfräsern and Abwalzfräser
DE3741592A1 (en) METHOD FOR DRESSING A GRINDING WHEEL
DE3731292C2 (en)
DE10126796C5 (en) Method and device for centerless cylindrical grinding
DE3340830C2 (en)
DE3817453C1 (en) method and apparatus for the cylindrical-surface grinding of workpieces, in particular the rough-grinding thereof
DE3047626C2 (en) Method for machining workpieces by means of a rotary cutting tool
DE1752992B2 (en) Device for grinding the ball grooves of round workpieces

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19850228

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH FR GB IT LI LU NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH FR GB IT LI LU NL SE

17Q First examination report despatched

Effective date: 19880824

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH FR GB IT LI LU NL SE

REF Corresponds to:

Ref document number: 78204

Country of ref document: AT

Date of ref document: 19920815

Kind code of ref document: T

ITF It: translation for a ep patent filed

Owner name: STUDIO FERRARIO

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
EPTA Lu: last paid annual fee
EAL Se: european patent in force in sweden

Ref document number: 85102261.6

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20040206

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20040216

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20040217

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20040220

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20040223

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20040224

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 20040225

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20040308

Year of fee payment: 20

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20050227

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20050227

Ref country code: CH

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20050227

BE20 Be: patent expired

Owner name: *JUNKER ERWIN

Effective date: 20050228

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20050228

Ref country code: LU

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20050228

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

NLV7 Nl: ceased due to reaching the maximum lifetime of a patent

Effective date: 20050228

EUG Se: european patent has lapsed
BE20 Be: patent expired

Owner name: *JUNKER ERWIN

Effective date: 20050228