EP2447000B2 - Method for processing a workpiece using a surface grinding machine - Google Patents

Method for processing a workpiece using a surface grinding machine Download PDF

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Publication number
EP2447000B2
EP2447000B2 EP10188874.1A EP10188874A EP2447000B2 EP 2447000 B2 EP2447000 B2 EP 2447000B2 EP 10188874 A EP10188874 A EP 10188874A EP 2447000 B2 EP2447000 B2 EP 2447000B2
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EP
European Patent Office
Prior art keywords
work piece
working area
workpiece
recited
moved
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EP10188874.1A
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German (de)
French (fr)
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EP2447000B1 (en
EP2447000A1 (en
Inventor
Markus Dipl.-Ing. Winkens (FH)
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Supfina Grieshaber GmbH and Co KG
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Supfina Grieshaber GmbH and Co KG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
    • B24B7/10—Single-purpose machines or devices
    • B24B7/16—Single-purpose machines or devices for grinding end-faces, e.g. of gauges, rollers, nuts, piston rings
    • B24B7/17—Single-purpose machines or devices for grinding end-faces, e.g. of gauges, rollers, nuts, piston rings for simultaneously grinding opposite and parallel end faces, e.g. double disc grinders
    • 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
    • B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
    • B24B7/02—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor involving a reciprocatingly-moved work-table
    • 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
    • B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
    • B24B7/04—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor involving a rotary work-table

Definitions

  • the invention relates to a method for machining a workpiece by means of a surface grinding machine, comprising at least one grinding wheel and at least one workpiece holder which can be driven in a movement plane for holding at least one workpiece, which can be introduced by means of the workpiece holder into a working region of the surface grinding machine and out of the work area Working area is limited by at least one effective surface of the at least one grinding wheel (see, eg EP-A-1 972 412 or US 4,635,401 A ).
  • grinding machines which have a grinding wheel for one-sided machining of a workpiece and two grinding wheels for double-sided machining of a workpiece, with which flat workpiece surfaces are produced.
  • additional grinding machines are used for each workpiece surface to be produced. This is disadvantageous in view of the overall production time of a complex-shaped workpiece and the space required for the plurality of machine tools space.
  • the present invention has the object to provide a method for machining a workpiece, with which the aforementioned disadvantages are avoided.
  • the inventive method makes it possible to produce even more complex workpieces by means of a surface grinding machine.
  • workpiece surfaces which are stepped relative to one another and parallel to one another can be produced.
  • the workpiece can remain in the same workpiece holder in which the workpiece can also be received along its entire length for a surface grinding process. In this way, production times can be significantly reduced. In addition, additional machine tools can be saved.
  • the distance between the workpiece surfaces of the machined part of the workpiece and the distance between the workpiece surfaces of the non-machined part of the workpiece are measured transversely, in particular perpendicular, to the plane of movement of the workpiece holder.
  • the workpiece surfaces not introduced into the work area are parallel to the machined workpiece surfaces.
  • workpieces can be produced, which each have mutually parallel workpiece surfaces on opposite sides of the workpiece.
  • a workpiece is machined by means of two grinding wheels, which each have an active surface, on opposite sides of the workpiece.
  • the inventive method is particularly well suited for the machining of workpieces, which is mirror-symmetrical with respect to a main plane which lies between the workpiece surfaces to be machined.
  • the inventive method can be used in principle for arbitrarily shaped workpieces.
  • special advantages arise when the workpiece is a connecting rod. This makes it possible to produce end faces of a piston pin bearing and end faces of a crankshaft bearing, which have different distances relative to each other.
  • the part of the connecting rod to be introduced into the working area is an end face of the piston pin bearing.
  • the part of the connecting rod which is not to be introduced into the work area is preferably an end face of the crankshaft bearing, so that it can be made wider and therefore more stable.
  • the present invention has the further object of providing a device with which the disadvantages described above are avoided.
  • a surface grinding machine comprising at least one rotating drivable grinding wheel with an effective surface, further comprising a workpiece holder for holding a workpiece to be machined, according to the invention that the workpiece holder by means of a workpiece holder drive into a working area bounded by the effective area and in opposite thereto movable and that one for carrying out one described above
  • Method provided control device for controlling the workpiece holder drive is provided.
  • the invention further relates to the use of a surface grinding machine for carrying out a method described above.
  • the surface grinding machine 10 has a first grinding wheel 12, which overlaps a workpiece holder 16 in the form of a transport disk 18 in a working area 14.
  • the first grinding wheel 12 has a working surface 14 facing, planar first active surface 20.
  • the surface grinding machine 10 comprises a second grinding wheel 22, which has a work area 14 with limiting second active surface 24.
  • the first active surface 20 and the second active surface 24 are in particular flat and preferably circular.
  • the active surfaces 20 and 24 are aligned in particular parallel to each other, but may also be slightly inclined to each other when the grinding wheels 12 and 22 are "tilted" relative to each other.
  • Each of the grinding wheels 12 and 22 has a rotary drive 26, which serves in each case for the rotational drive of a grinding wheel 12, 22 about a respectively associated rotation axis 28.
  • the workpiece holder 16 has a workpiece holder drive 30, which serves to rotate or pivot the workpiece holder 16 about a workpiece holder axis 32.
  • the workpiece holder axis 32 and the grinding wheel axes 28 are preferably at least substantially parallel relative to each other.
  • the workpiece holder 16 comprises at least one workpiece holder 34, which is designed in particular in the form of a recess into which a workpiece 36 to be machined can be inserted such that it faces away from the workpiece sides 38 and 40 (cf. FIG. 2 ) each protrudes beyond an upper and lower boundary of the workpiece holder 16.
  • the bearing surface 41 extends to the boundary of the grinding wheels 12, 22 adjacent to an edge 43 which in FIG. 1 is covered by the transport disc 18 and therefore shown with a dashed line.
  • the grinding wheel 12 is associated with a grinding wheel drive 44, by means of which the grinding wheel 12 is movable in the direction parallel to the grinding wheel axis 28 in the direction of the working area 14 and opposite thereto.
  • Another grinding wheel drive 46 serves to move the second grinding wheel 22 in a direction parallel to the grinding wheel axis 28 in the direction of the working area 14 and opposite thereto.
  • the grinding wheel drives 44 and 46 are over in FIG. 2 indicated data lines coupled to a controller 48, which in FIG. 1 is shown.
  • the control device 48 is additionally coupled to the workpiece holder drive 30.
  • the control device 48 serves to control a delivery of the grinding wheels 12 and 22 for adjusting the distance between the active surfaces 20 and 24 and to control a rotational and / or pivoting movement of the workpiece holder 16 about the workpiece holder axis 32.
  • the workpiece 36 is formed in particular in the form of a connecting rod 42.
  • the connecting rod 42 extends within a main plane 50, between a front end 52 and a rear end 54. Adjacent to the front end 52, the connecting rod 42, a piston pin bearing 56 and adjacent to the rear end 54, a crankshaft bearing 58 on.
  • the workpiece holder 16 For introducing a workpiece 36 into the working area 14 and for executing a workpiece 36 out of the working area 14, the workpiece holder 16 is rotatable or pivotable about the workpiece holder drive axis 32 in a direction of movement 64 and in a movement direction 66 opposite thereto. In this case, the workpiece holder 16 moves in a plane of movement 68.
  • the workpiece holder 16 For machining an unprocessed workpiece 36, this is introduced by means of the workpiece holder 16 into the working region 14 of the active surfaces 20, 24. In this case, they have a first, larger distance relative to each other.
  • the workpiece 36 is thereby introduced along its entire length in the work area.
  • the workpiece can be inserted in the same direction of movement 64 or 66 at a first end of the working area 14 in this and executed at another end of the work area 14 again.
  • the workpiece in the first direction of movement to introduce along its entire length in the work area 14 and run in the opposite second direction of movement again from the work area 14.
  • the end faces 62 are generated. In the area of the end faces 60 still to be produced, the workpiece initially still has an oversize.
  • the distance of the active surfaces 20 and 24 is reduced to a second, smaller distance.
  • the workpiece 36 is then not introduced along its entire length between its front end 52 and its rear end 54 in the work area 14, but - in a first direction of movement 64 - only along part of its length, namely one Part that includes the piston pin bearing 56.
  • the part of the workpiece which has the end faces 62 produced as described above remains outside of the working area 14. After machining the workpiece 36 along part of its length, this part of the workpiece 36 is again out of the working area in the direction of movement 66 opposite the first direction of movement 64 14 away.
  • end faces 60 can be generated, which have a smaller distance relative to each other than the end faces 62. In this way, provided with a plane-parallel steps workpiece 36 are produced by means of the same surface grinding machine 10.
  • a workpiece holder As an alternative to the workpiece holder 16 described above in the form of a transport disk 18, it is also possible to use a workpiece holder, with which the workpiece is moved along a straight trajectory.
  • a workpiece holder is used, which (for example in the form of a carriage) along a straight trajectory (for example in the form of a carriage guide) is reciprocally driven and drivable.
  • the control of the movement preferably takes place by means of the control device 48.
  • a rectilinear guide can be used, on which a workpiece holder in the form of a carriage is guided so that a workpiece 36 held on the workpiece holder can be inserted in a straight line into the working area 14 and out of the working area 14.

Description

Die Erfindung betrifft ein Verfahren zur Bearbeitung eines Werkstücks mittels einer Planschleifmaschine, umfassend mindestens eine Schleifscheibe und mindestens einen in einer Bewegungsebene antreibbaren Werkstückhalter zum Halten mindestens eines Werkstücks, welches mittels des Werkstückhalters in einen Arbeitsbereich der Planschleifmaschine einführbar und aus dem Arbeitsbereich herausführbar ist, wobei der Arbeitsbereich durch mindestens eine Wirkfläche der mindestens einen Schleifscheibe begrenzt ist (siehe z.B. EP-A-1 972 412 oder US 4,635,401 A ).The invention relates to a method for machining a workpiece by means of a surface grinding machine, comprising at least one grinding wheel and at least one workpiece holder which can be driven in a movement plane for holding at least one workpiece, which can be introduced by means of the workpiece holder into a working region of the surface grinding machine and out of the work area Working area is limited by at least one effective surface of the at least one grinding wheel (see, eg EP-A-1 972 412 or US 4,635,401 A ).

Zur Durchführung solcher Verfahren werden Schleifmaschinen eingesetzt, welche für die einseitige Bearbeitung eines Werkstücks eine Schleifscheibe und für die doppelseitige Bearbeitung eines Werkstücks zwei Schleifscheiben aufweisen, mit denen ebene Werkstückoberflächen erzeugt werden. Zur Herstellung komplexerer Werkstückformen kommen für jede zu erzeugende Werkstückoberfläche weitere Schleifmaschinen zum Einsatz. Dies ist im Hinblick auf die Gesamtfertigungszeit eines komplex geformten Werkstücks und auf den für die Vielzahl der Werkzeugmaschinen benötigten Platzbedarf nachteilig.To carry out such methods, grinding machines are used which have a grinding wheel for one-sided machining of a workpiece and two grinding wheels for double-sided machining of a workpiece, with which flat workpiece surfaces are produced. To produce more complex workpiece shapes, additional grinding machines are used for each workpiece surface to be produced. This is disadvantageous in view of the overall production time of a complex-shaped workpiece and the space required for the plurality of machine tools space.

Hiervon ausgehend liegt der vorliegenden Erfindung die Aufgabe zugrunde, ein Verfahren zur Bearbeitung eines Werkstücks zu schaffen, mit dem die vorstehend genannten Nachteile vermieden werden.On this basis, the present invention has the object to provide a method for machining a workpiece, with which the aforementioned disadvantages are avoided.

Diese Aufgabe wird bei einem Verfahren der eingangs genannten Art erfindungsgemäß durch die kennzeichnenden Merkmale des Patentanspruchs 1 gelöst.This object is achieved according to the invention in a method of the type mentioned by the characterizing features of claim 1.

Das erfindungsgemäße Verfahren ermöglicht es, auch komplexer geformte Werkstücke mittels einer Planschleifmaschine herstellen zu können. Insbesondere können relativ zueinander gestufte, zueinander parallele Werkstückoberflächen erzeugt werden.The inventive method makes it possible to produce even more complex workpieces by means of a surface grinding machine. In particular, workpiece surfaces which are stepped relative to one another and parallel to one another can be produced.

Dabei kann das Werkstück während der Herstellung gestufter Werkstückoberflächen in derselben Werkstückaufnahme verbleiben, in welcher das Werkstück auch für eine planschleifende Bearbeitung entlang seiner gesamten Länge aufnehmbar ist. Auf diese Weise können Fertigungszeiten erheblich reduziert werden. Außerdem können zusätzliche Werkzeugmaschinen eingespart werden.In this case, during the production of stepped workpiece surfaces, the workpiece can remain in the same workpiece holder in which the workpiece can also be received along its entire length for a surface grinding process. In this way, production times can be significantly reduced. In addition, additional machine tools can be saved.

Der Abstand zwischen den Werkstückoberflächen des bearbeiteten Teils des Werkstücks und der Abstand zwischen den Werkstückoberflächen des nicht bearbeiteten Teils des Werkstücks werden quer, insbesondere senkrecht, zu der Bewegungsebene des Werkstückhalters gemessen.The distance between the workpiece surfaces of the machined part of the workpiece and the distance between the workpiece surfaces of the non-machined part of the workpiece are measured transversely, in particular perpendicular, to the plane of movement of the workpiece holder.

Insbesondere ist es möglich, dass die nicht in den Arbeitsbereich eingeführten Werkstückoberflächen parallel zu den bearbeiteten Werkstückoberflächen sind. Auf diese Weise können Werkstücke hergestellt werden, welche jeweils auf voneinander abgewandten Werkstückseiten zueinander parallele Werkstückoberflächen aufweisen.In particular, it is possible that the workpiece surfaces not introduced into the work area are parallel to the machined workpiece surfaces. In this way, workpieces can be produced, which each have mutually parallel workpiece surfaces on opposite sides of the workpiece.

Zur Herstellung eines Werkstücks mit relativ zueinander parallelen und relativ zueinander gestuften Werkstückoberflächen ist es vorteilhaft, wenn das Werkstück zunächst - vor Einführung nur eines Teils seiner Länge in den Arbeitsbereich - entlang seiner gesamten Länge in dem Arbeitsbereich bearbeitet wird. Auf diese Weise können Ausgangsebenen hergestellt werden, welche entlang eines Teils ihrer Länge erhalten bleiben, nämlich entlang desjenigen Teils, welcher in einem nachfolgenden Bearbeitungsschritt nicht in den Arbeitsbereich zwischen den Wirkflächen der Schleifscheiben eingeführt wird.In order to produce a workpiece with workpiece surfaces that are relatively parallel and stepped relative to one another, it is advantageous if the workpiece is first of all machined along its entire length in the working area-before introducing only a portion of its length into the working area. In this way, it is possible to produce initial planes which remain along a part of their length, namely along that part which is not introduced into the working area between the active surfaces of the grinding wheels in a subsequent processing step.

Nach einer Ausgestaltung der Erfindung wird ein Werkstück mittels zwei Schleifscheiben, welche jeweils eine Wirkfläche aufweisen, auf voneinander abgewandten Werkstückseiten bearbeitet.According to one embodiment of the invention, a workpiece is machined by means of two grinding wheels, which each have an active surface, on opposite sides of the workpiece.

Das erfindungsgemäße Verfahren eignet sich besonders gut zur Bearbeitung von Werkstücken, welche bezogen auf eine Hauptebene, welche zwischen den zu bearbeitenden Werkstückoberflächen liegt, spiegelsymmetrisch ist.The inventive method is particularly well suited for the machining of workpieces, which is mirror-symmetrical with respect to a main plane which lies between the workpiece surfaces to be machined.

Das erfindungsgemäße Verfahren ist im Prinzip für beliebig geformte Werkstücke einsetzbar. Besondere Vorteile ergeben sich jedoch, wenn es sich bei dem Werkstück um ein Pleuel handelt. Hierdurch ist es möglich, Stirnflächen eines Kolbenbolzenlagers und Stirnflächen eines Kurbelwellenlagers herzustellen, welche unterschiedliche Abstände relativ zueinander aufweisen.The inventive method can be used in principle for arbitrarily shaped workpieces. However, special advantages arise when the workpiece is a connecting rod. This makes it possible to produce end faces of a piston pin bearing and end faces of a crankshaft bearing, which have different distances relative to each other.

Da üblicherweise im Bereich des Kolbenbolzenlagers, des Kolbenbolzens und der Kolbenunterseite nur ein kleiner Bauraum zur Verfügung steht, ist es bevorzugt, wenn es sich bei dem in den Arbeitsbereich einzuführenden Teil des Pleuels um Stirnflächen des Kolbenbolzenlagers handelt.Since usually only a small space is available in the region of the piston pin bearing, the piston pin and the piston underside, it is preferred if the part of the connecting rod to be introduced into the working area is an end face of the piston pin bearing.

Bei dem nicht in den Arbeitsbereich einzuführenden Teil des Pleuels handelt es sich vorzugsweise um Stirnflächen des Kurbelwellenlagers, sodass dieses breiter und somit stabiler ausgebildet werden kann.The part of the connecting rod which is not to be introduced into the work area is preferably an end face of the crankshaft bearing, so that it can be made wider and therefore more stable.

Der vorliegenden Erfindung liegt die weitere Aufgabe zugrunde, eine Vorrichtung anzugeben, mit welcher die eingangs beschriebenen Nachteile vermieden werden.The present invention has the further object of providing a device with which the disadvantages described above are avoided.

Diese Aufgabe wird bei einer Planschleifmaschine, umfassend mindestens eine rotierend antreibbare Schleifscheibe mit einer Wirkfläche, ferner umfassend einen Werkstückhalter zum Halten eines zu bearbeitenden Werkstücks, erfindungsgemäß dadurch gelöst, dass der Werkstückhalter mittels eines Werkstückhalterantriebs in einen von der Wirkfläche begrenzten Arbeitsbereich hinein und entgegensetzt hierzu bewegbar ist, und dass eine zur Durchführung eines vorstehend beschriebenen Verfahrens eingerichtete Steuerungseinrichtung zur Steuerung des Werkstückhalterantriebs vorgesehen ist.This object is achieved in a surface grinding machine, comprising at least one rotating drivable grinding wheel with an effective surface, further comprising a workpiece holder for holding a workpiece to be machined, according to the invention that the workpiece holder by means of a workpiece holder drive into a working area bounded by the effective area and in opposite thereto movable and that one for carrying out one described above Method provided control device for controlling the workpiece holder drive is provided.

Vorteile und Ausgestaltungen der erfindungsgemäßen Planschleifmaschine sind bereits vorstehend im Zusammenhang mit den Vorteilen und Ausgestaltungen des erfindungsgemäßen Verfahrens erläutert worden.Advantages and embodiments of the surface grinding machine according to the invention have already been explained above in connection with the advantages and refinements of the method according to the invention.

Die Erfindung betrifft ferner die Verwendung einer Planschleifmaschine zur Durchführung eines vorstehend beschriebenen Verfahrens.The invention further relates to the use of a surface grinding machine for carrying out a method described above.

Weitere Merkmale und Vorteile der Erfindung sind Gegenstand der nachfolgenden Beschreibung und der zeichnerischen Darstellung eines bevorzugten Ausführungsbeispiels.Further features and advantages of the invention are the subject of the following description and the diagrammatic representation of a preferred embodiment.

In den Zeichnungen zeigen:

Figur 1
eine Draufsicht einer Ausführungsform einer Planschleifmaschine; und
Figur 2
eine Seitenansicht eines Teils der beiden Schleifscheiben der Planschleifmaschine gemäß Figur 1 und eines Werkstücks.
In the drawings show:
FIG. 1
a plan view of an embodiment of a surface grinding machine; and
FIG. 2
a side view of a portion of the two grinding wheels of the surface grinding machine according to FIG. 1 and a workpiece.

Eine Ausführungsform einer Planschleifmaschine ist in der Zeichnung mit dem Bezugszeichen 10 bezeichnet. Die Planschleifmaschine 10 weist eine erste Schleifscheibe 12 auf, welche in einem Arbeitsbereich 14 einen Werkstückhalter 16 in Form einer Transportscheibe 18 überlappt. Die erste Schleifscheibe 12 weist eine dem Arbeitsbereich 14 zugewandte, ebene erste Wirkfläche 20 auf. Die Planschleifmaschine 10 umfasst eine zweite Schleifscheibe 22, welche eine den Arbeitsbereich 14 mit begrenzende zweite Wirkfläche 24 aufweist. Die erste Wirkfläche 20 und die zweite Wirkfläche 24 sind insbesondere eben und vorzugsweise kreisförmig.An embodiment of a surface grinding machine is designated by the reference numeral 10 in the drawing. The surface grinding machine 10 has a first grinding wheel 12, which overlaps a workpiece holder 16 in the form of a transport disk 18 in a working area 14. The first grinding wheel 12 has a working surface 14 facing, planar first active surface 20. The surface grinding machine 10 comprises a second grinding wheel 22, which has a work area 14 with limiting second active surface 24. The first active surface 20 and the second active surface 24 are in particular flat and preferably circular.

Die Wirkflächen 20 und 24 sind insbesondere parallel zueinander ausgerichtet, können jedoch auch geringfügig zueinander geneigt sein, wenn die Schleifscheiben 12 und 22 relativ zueinander "getiltet" sind.The active surfaces 20 and 24 are aligned in particular parallel to each other, but may also be slightly inclined to each other when the grinding wheels 12 and 22 are "tilted" relative to each other.

Jede der Schleifscheiben 12 und 22 weist einen Rotationsantrieb 26 auf, welcher jeweils zum Rotationsantrieb einer Schleifscheibe 12, 22 um eine jeweils zugeordnete Rotationsachse 28 dient.Each of the grinding wheels 12 and 22 has a rotary drive 26, which serves in each case for the rotational drive of a grinding wheel 12, 22 about a respectively associated rotation axis 28.

Der Werkstückhalter 16 weist einen Werkstückhalterantrieb 30 auf, welcher dazu dient, den Werkstückhalter 16 um eine Werkstückhalterachse 32 zu verdrehen oder zu verschwenken. Die Werkstückhalterachse 32 und die Schleifscheibenachsen 28 sind vorzugsweise relativ zueinander zumindest im Wesentlichen parallel.The workpiece holder 16 has a workpiece holder drive 30, which serves to rotate or pivot the workpiece holder 16 about a workpiece holder axis 32. The workpiece holder axis 32 and the grinding wheel axes 28 are preferably at least substantially parallel relative to each other.

Der Werkstückhalter 16 umfasst mindestens eine Werkstückaufnahme 34, welche insbesondere in Form einer Aussparung ausgebildet ist, in welche ein zu bearbeitendes Werkstück 36 derart einlegbar ist, dass es mit voneinander abgewandten Werkstückseiten 38 und 40 (vergleiche Figur 2) jeweils über eine obere und untere Begrenzung des Werkstückhalters 16 hervorsteht.The workpiece holder 16 comprises at least one workpiece holder 34, which is designed in particular in the form of a recess into which a workpiece 36 to be machined can be inserted such that it faces away from the workpiece sides 38 and 40 (cf. FIG. 2 ) each protrudes beyond an upper and lower boundary of the workpiece holder 16.

Außerhalb des Arbeitsbereichs 14 ist das Werkstück mittels einer Auflagefläche 41 nach unten hin abgestützt. Die Auflagefläche 41 erstreckt sich an die Berandung der Schleifscheiben 12, 22 angrenzend bis hin zu einem Rand 43, der in Figur 1 von der Transportscheibe 18 überdeckt und daher mit einer gestrichelten Linie dargestellt ist.Outside the working area 14, the workpiece is supported by means of a support surface 41 downwards. The bearing surface 41 extends to the boundary of the grinding wheels 12, 22 adjacent to an edge 43 which in FIG. 1 is covered by the transport disc 18 and therefore shown with a dashed line.

Der Schleifscheibe 12 ist ein Schleifscheibenantrieb 44 zugeordnet, mittels welchem die Schleifscheibe 12 in zu der Schleifscheibenachse 28 paralleler Richtung in Richtung auf den Arbeitsbereich 14 und hierzu entgegengesetzt bewegbar ist. Ein weiterer Schleifscheibenantrieb 46 dient zur Bewegung der zweiten Schleifscheibe 22 in zu der Schleifscheibenachse 28 paralleler Richtung in Richtung auf den Arbeitsbereich 14 und hierzu entgegengesetzt.The grinding wheel 12 is associated with a grinding wheel drive 44, by means of which the grinding wheel 12 is movable in the direction parallel to the grinding wheel axis 28 in the direction of the working area 14 and opposite thereto. Another grinding wheel drive 46 serves to move the second grinding wheel 22 in a direction parallel to the grinding wheel axis 28 in the direction of the working area 14 and opposite thereto.

Die Schleifscheibenantriebe 44 und 46 sind über in Figur 2 angedeutete Datenleitungen mit einer Steuerungseinrichtung 48 gekoppelt, welche in Figur 1 dargestellt ist. Die Steuerungseinrichtung 48 ist zusätzlich mit dem Werkstückhalterantrieb 30 gekoppelt. Die Steuerungseinrichtung 48 dient dazu, eine Zustellung der Schleifscheiben 12 und 22 zur Einstellung des Abstandes zwischen den Wirkflächen 20 und 24 zu steuern sowie dazu, eine Dreh- und/oder Schwenkbewegung des Werkstückhalters 16 um die Werkstückhalterachse 32 zu steuern.The grinding wheel drives 44 and 46 are over in FIG. 2 indicated data lines coupled to a controller 48, which in FIG. 1 is shown. The control device 48 is additionally coupled to the workpiece holder drive 30. The control device 48 serves to control a delivery of the grinding wheels 12 and 22 for adjusting the distance between the active surfaces 20 and 24 and to control a rotational and / or pivoting movement of the workpiece holder 16 about the workpiece holder axis 32.

Das Werkstück 36 ist insbesondere in Form eines Pleuels 42 ausgebildet. Das Pleuel 42 erstreckt sich innerhalb einer Hauptebene 50, und zwar zwischen einem vorderen Ende 52 und einem rückwärtigen Ende 54. Benachbart zu dem vorderen Ende 52 weist das Pleuel 42 ein Kolbenbolzenlager 56 und benachbart zu dem rückwärtigen Ende 54 ein Kurbelwellenlager 58 auf.The workpiece 36 is formed in particular in the form of a connecting rod 42. The connecting rod 42 extends within a main plane 50, between a front end 52 and a rear end 54. Adjacent to the front end 52, the connecting rod 42, a piston pin bearing 56 and adjacent to the rear end 54, a crankshaft bearing 58 on.

Benachbart zu dem Kolbenbolzenlager 56 weist das Pleuel 42 einander abgewandte erste Stirnflächen 60 und benachbart zu dem Kurbelwellenlager 58 einander abgewandte zweite Stirnflächen 62 auf.Adjacent to the piston pin bearing 56, the connecting rod 42 facing away from each other first end faces 60 and adjacent to the crankshaft bearing 58 facing away from each other second end faces 62.

Zur Einführung eines Werkstücks 36 in den Arbeitsbereich 14 hinein und zur Ausführung eines Werkstücks 36 aus dem Arbeitsbereich 14 heraus ist der Werkstückhalter 16 in einer Bewegungsrichtung 64 und entgegengesetzt hierzu in einer Bewegungsrichtung 66 um die Werkstückhalterantriebsachse 32 verdreh- oder verschwenkbar. Dabei bewegt sich der Werkstückhalter 16 in einer Bewegungsebene 68.For introducing a workpiece 36 into the working area 14 and for executing a workpiece 36 out of the working area 14, the workpiece holder 16 is rotatable or pivotable about the workpiece holder drive axis 32 in a direction of movement 64 and in a movement direction 66 opposite thereto. In this case, the workpiece holder 16 moves in a plane of movement 68.

Zur Bearbeitung eines unbearbeiteten Werkstücks 36 wird dieses mittels des Werkstückhalters 16 in den Arbeitsbereich 14 der Wirkflächen 20, 24 eingebracht. Dabei weisen diese einen ersten, größeren Abstand relativ zueinander auf. Das Werkstück 36 wird dabei entlang seiner gesamten Länge in den Arbeitsbereich eingebracht. Hierbei kann das Werkstück in derselben Bewegungsrichtung 64 oder 66 an einem ersten Ende des Arbeitsbereichs 14 in diesen eingeführt und an einem anderen Ende aus dem Arbeitsbereich 14 wieder ausgeführt werden. Es ist aber auch möglich, das Werkstück in der ersten Bewegungsrichtung entlang seiner gesamten Länge in den Arbeitsbereich 14 einzuführen und in der entgegengesetzten zweiten Bewegungsrichtung wieder aus dem Arbeitsbereich 14 auszuführen.For machining an unprocessed workpiece 36, this is introduced by means of the workpiece holder 16 into the working region 14 of the active surfaces 20, 24. In this case, they have a first, larger distance relative to each other. The workpiece 36 is thereby introduced along its entire length in the work area. In this case, the workpiece can be inserted in the same direction of movement 64 or 66 at a first end of the working area 14 in this and executed at another end of the work area 14 again. But it is also possible, the workpiece in the first direction of movement to introduce along its entire length in the work area 14 and run in the opposite second direction of movement again from the work area 14.

Durch den vorstehend beschriebenen Bearbeitungsvorgang werden die Stirnflächen 62 erzeugt. Im Bereich der noch zu erzeugenden Stirnflächen 60 weist das Werkstück zunächst noch ein Übermaß auf.By the above-described machining operation, the end faces 62 are generated. In the area of the end faces 60 still to be produced, the workpiece initially still has an oversize.

Hieran anschließend wird - während sich das Werkstück 36 außerhalb des Arbeitsbereichs 14 befindet, der Abstand der Wirkflächen 20 und 24 auf einen zweiten, kleineren Abstand verkleinert. In einem sich anschließenden, weiteren Bearbeitungsvorgang wird das Werkstück 36 dann nicht entlang seiner gesamten Länge zwischen seinem vorderen Ende 52 und seinem rückwärtigen Ende 54 in den Arbeitsbereich 14 eingeführt, sondern - in einer ersten Bewegungsrichtung 64 - lediglich entlang eines Teils seiner Länge, nämlich eines Teils, der das Kolbenbolzenlager 56 umfasst. Derjenige Teil des Werkstücks, der die wie vorstehend beschrieben hergestellten Stirnflächen 62 aufweist, verbleibt außerhalb des Arbeitsbereichs 14. Nach Bearbeitung des Werkstücks 36 entlang eines Teils seiner Länge wird dieser Teil des Werkstücks 36 in zu der ersten Bewegungsrichtung 64 entgegengesetzter Bewegungsrichtung 66 wieder aus dem Arbeitsbereich 14 entfernt.Subsequently, while the workpiece 36 is located outside of the working area 14, the distance of the active surfaces 20 and 24 is reduced to a second, smaller distance. In a subsequent, further processing operation, the workpiece 36 is then not introduced along its entire length between its front end 52 and its rear end 54 in the work area 14, but - in a first direction of movement 64 - only along part of its length, namely one Part that includes the piston pin bearing 56. The part of the workpiece which has the end faces 62 produced as described above remains outside of the working area 14. After machining the workpiece 36 along part of its length, this part of the workpiece 36 is again out of the working area in the direction of movement 66 opposite the first direction of movement 64 14 away.

Dadurch, dass lediglich der zu dem vorderen Ende 52 benachbarte Teil des Werkstücks 36 in den Arbeitsbereich 14 eingeführt wird, können Stirnflächen 60 erzeugt werden, welche einen kleineren Abstand relativ zueinander aufweisen als die Stirnflächen 62. Auf diese Weise kann ein mit planparallelen Stufen versehenes Werkstück 36 mittels derselben Planschleifmaschine 10 hergestellt werden.Characterized in that only the adjacent to the front end 52 of the workpiece 36 is inserted into the work area 14, end faces 60 can be generated, which have a smaller distance relative to each other than the end faces 62. In this way, provided with a plane-parallel steps workpiece 36 are produced by means of the same surface grinding machine 10.

Alternativ zu dem vorstehend beschriebenen Werkstückhalter 16 in Form einer Transportscheibe 18 ist es auch möglich, einen Werkstückhalter zu verwenden, mit dem das Werkstück entlang einer geraden Bewegungsbahn bewegt wird. Hierfür wird ein Werkstückhalter verwendet, welcher (beispielsweise in Form eines Schlittens) entlang einer geraden Bewegungsbahn (beispielsweise in Form einer Schlittenführung) hin- und herbewegbar antreibbar ist. Die Steuerung der Bewegung erfolgt vorzugsweise mittels der Steuerungseinrichtung 48.As an alternative to the workpiece holder 16 described above in the form of a transport disk 18, it is also possible to use a workpiece holder, with which the workpiece is moved along a straight trajectory. For this purpose, a workpiece holder is used, which (for example in the form of a carriage) along a straight trajectory (for example in the form of a carriage guide) is reciprocally driven and drivable. The control of the movement preferably takes place by means of the control device 48.

Beispielsweise kann anstelle einer Transportscheibe 18 eine geradlinige Führung verwendet werden, auf welcher ein Werkstückhalter in Form eines Schlittens so geführt ist, dass ein an dem Werkstückhalter gehaltenes Werkstück 36 geradlinig in den Arbeitsbereich 14 hinein einführbar und aus dem Arbeitsbereich 14 heraus ausführbar ist.For example, instead of a transport disk 18, a rectilinear guide can be used, on which a workpiece holder in the form of a carriage is guided so that a workpiece 36 held on the workpiece holder can be inserted in a straight line into the working area 14 and out of the working area 14.

Es ist aber auch möglich, das Werkstück entlang einer frei wählbaren Bewegungsbahn hin- und herzuführen, welche quer zu der Wirkflächenbewegungsrichtung verläuft. Hierfür können beispielsweise frei programmierbare Handlingsysteme oder Greifer verwendet werden. However, it is also possible to guide the workpiece back and forth along a freely selectable movement path, which runs transversely to the direction of the effective surface movement. For this example, freely programmable handling systems or grippers can be used.

Claims (11)

  1. A method for machining a work piece (36) using a surface grinding machine (10), comprising at least one grinding disk (12, 22) and at least one work piece holder (16) that is driven in one plane of motion (68) so as to hold at least one work piece (36), which by means of the work piece holder (16) can be moved into a working area (14) of the surface grinding machine (10) and moved out of the working area (14), whereby the working area (14) is delimited by at least one work surface (20, 24) of the at least one grinding disk (12, 22), characterized in that the work piece (36) is moved into the working area (14) only along a first portion of its length, is machined using the at least one work surface (20, 24), and is removed from the working area (14), so that after the machining of this first part of the work piece (36) a distance of the work piece surfaces (60) of this part is smaller than a distance of the work piece surfaces (62) that were not moved into the working area (14) and that were not machined during the machining of the first part of the work piece (36).
  2. The method as recited in Claim 1, characterized in that the work piece surfaces (62) that were not moved into the working area (14) are parallel to the machined work piece surfaces (60).
  3. The method as recited in any of the preceding claims, characterized in that the work piece (36) is initially machined - prior to the introduction of only a portion of its length into the working area (14) - along its entire length in the working area (14).
  4. The method as recited in any of the preceding claims, characterized in that the work piece is machined on sides (38, 40) that are facing away from each other by two grinding disks (12, 22), each of which has a work surface (20, 24).
  5. The method as recited in any of the preceding claims, characterized in that the work piece (36) is mirror-symmetrical with respect to a main plane (50), which is situated between the surfaces (60, 62) of the work piece that are to be machined.
  6. The method as recited in any of the preceding claims, characterized in that the work piece (36) is a piston rod (42) .
  7. The method as recited in Claim 6, characterized in that parts of the piston rod that are to be moved into the working area (14) are end faces (60) of a small end bearing (56).
  8. The method as recited in Claim 6 or 7, characterized in that the part of the piston rod (42) that is not to be moved into the working area (14) is a crankshaft bearing (58) .
  9. A surface grinding machine (10), comprising at least one rotatably driven grinding disk (12, 22) having a work surface (20, 24), and also comprising a work piece holder (16) for holding a work piece (36) to be machined, characterized in that the work piece holder (16) is moved by a work piece holder drive (30) into a working area (14) that is delimited by the work surface (20, 24) and then is moved in the opposite direction, and a control device (48) that is designed to carry out a method as recited in any of the preceding claims is provided for controlling the work piece holder drive (30).
  10. The surface grinding machine (10) as recited in Claim 9, comprising two rotatably driven grinding disks (12, 22) each having a work surface (20, 24) which delimits the working area (14).
  11. An application of a surface grinding machine (10) for carrying out a method as recited in any of Claims 1 to 8.
EP10188874.1A 2010-10-26 2010-10-26 Method for processing a workpiece using a surface grinding machine Not-in-force EP2447000B2 (en)

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DE102012024248A1 (en) * 2012-12-12 2014-06-12 Diskus Werke Schleiftechnik Gmbh Method for manufacturing connecting rod to provide link between piston and crankshaft of reciprocating engine, involves limiting set of ends by set of grinding elements of wheels by limiting part or grinding area of chamber

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4635401A (en) † 1983-09-01 1987-01-13 Daisho Seiki Kabushiki Kaisha Duplex-head surface grinder

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Publication number Priority date Publication date Assignee Title
US4663890A (en) * 1982-05-18 1987-05-12 Gmn Georg Muller Nurnberg Gmbh Method for machining workpieces of brittle hard material into wafers
JP5060144B2 (en) * 2007-03-23 2012-10-31 光洋機械工業株式会社 Double-head surface grinding method and apparatus

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4635401A (en) † 1983-09-01 1987-01-13 Daisho Seiki Kabushiki Kaisha Duplex-head surface grinder

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