EP2769806B1 - Device and system for finishing a workpiece in the form of a crankshaft or a camshaft - Google Patents

Device and system for finishing a workpiece in the form of a crankshaft or a camshaft Download PDF

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Publication number
EP2769806B1
EP2769806B1 EP13156079.9A EP13156079A EP2769806B1 EP 2769806 B1 EP2769806 B1 EP 2769806B1 EP 13156079 A EP13156079 A EP 13156079A EP 2769806 B1 EP2769806 B1 EP 2769806B1
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EP
European Patent Office
Prior art keywords
tool
finishing
work piece
drive
workpiece
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.)
Active
Application number
EP13156079.9A
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German (de)
French (fr)
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EP2769806A1 (en
Inventor
Oliver Hildebrandt
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.)
Supfina Grieshaber GmbH and Co KG
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Supfina Grieshaber GmbH and Co KG
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.)
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Publication date
Application filed by Supfina Grieshaber GmbH and Co KG filed Critical Supfina Grieshaber GmbH and Co KG
Priority to EP13156079.9A priority Critical patent/EP2769806B1/en
Priority to US14/769,103 priority patent/US9550265B2/en
Priority to PCT/EP2014/050499 priority patent/WO2014127926A1/en
Priority to BR112015020081-8A priority patent/BR112015020081B1/en
Priority to CN201480018814.6A priority patent/CN105121093B/en
Publication of EP2769806A1 publication Critical patent/EP2769806A1/en
Application granted granted Critical
Publication of EP2769806B1 publication Critical patent/EP2769806B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B27/00—Other grinding machines or devices
    • B24B27/0076—Other grinding machines or devices grinding machines comprising two or more grinding tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
    • B24B19/08—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding non-circular cross-sections, e.g. shafts of elliptical or polygonal cross-section
    • B24B19/12—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding non-circular cross-sections, e.g. shafts of elliptical or polygonal cross-section for grinding cams or camshafts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
    • B24B21/006—Machines or devices using grinding or polishing belts; Accessories therefor for special purposes, e.g. for television tubes, car bumpers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
    • B24B21/008—Machines comprising two or more tools or having several working posts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
    • B24B21/02—Machines or devices using grinding or polishing belts; Accessories therefor for grinding rotationally symmetrical surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B35/00—Machines or devices designed for superfinishing surfaces on work, i.e. by means of abrading blocks reciprocating with high frequency
    • 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
    • B24B5/36—Single-purpose machines or devices
    • B24B5/42—Single-purpose machines or devices for grinding crankshafts or crankpins

Definitions

  • the invention relates to a device having the features of the preamble of patent claim 1.
  • a method for external microfinishing of a rotationally symmetrical body in which the body is rotated, a finishing tool is moved in an oscillating manner parallel to the axis of rotation and in which the oscillating Movement of the finishing tool is superimposed on a further movement in the direction parallel to the axis of rotation.
  • This method is also known under the heading "finish machining with overlay strokeā€ and has the advantage that a profile of a finish-machined workpiece surface can be set differently from a cylindrical jacket surface. In this way, for example, a slightly spherical shaped crankshaft bearing surface can be generated.
  • a device for finishing machining of camshafts or crankshafts having a first group of first finishing units and a second group of second finishing units, wherein the finishing units are seen in the axial direction alternately assigned to the first group and the second group and wherein the first group and the second group are arranged angularly offset relative to each other.
  • the present invention has the object to provide a device for finish machining of crankshafts or camshafts, with which the setup effort for the production of crankshafts or camshafts with different geometries can be reduced.
  • the movements of the first finishing tool and the second finishing tool are decoupled from each other in the direction parallel to the workpiece axis.
  • a tool drive is provided, which puts only the first finishing tool for machining a main bearing or a group of first finishing tools for machining a group of main bearings in a direction parallel to the workpiece axis movement.
  • a tool drive is provided, which exclusively the second finishing tool for machining an additional bearing (ie a connecting rod bearing or a cam surface) or a Group of second finishing tools for machining a group of additional bearings in parallel to the workpiece axis direction drives.
  • the decoupling according to the invention of the movement of the first finishing tool and the second finishing tool enables flexible machining of different crankshafts, which have different main bearing widths and / or connecting rod bearing widths or different camshafts, which have different main bearing widths and / or cam surface widths.
  • first finishing tools and second finishing tools are arranged alternately, so that the main bearings and auxiliary bearings of a workpiece are machined finish-in the same clamping (ie, in the same workpiece holder, preferably in the unchanged position of the workpiece holder).
  • a workpiece drive for generating an oscillating movement of the workpiece in a direction parallel to the workpiece axis.
  • at least one tool drive can be at least for a group of finishing tools (for example, for the first finishing tools for Processing of the main bearings) a Matterlagerungshub be provided.
  • the workpiece drive for generating a higher oscillation frequency and / or a smaller oscillation stroke is designed as at least one of the tool drives.
  • the tool holder and the workpiece form a relatively stiff compared to the finishing tools assembly, which is better suited for a highly dynamic drive than the finishing tools.
  • a first tool drive for generating an oscillating movement of the finishing tool in a direction parallel to the workpiece axis and a second tool drive for generating an oscillating, independent of the movement of the first finishing tool movement of the second finishing tool in parallel to the workpiece axis direction.
  • a Studentslagerungshub can be provided for both the main bearing and the additional storage.
  • a higher-frequency, short-stroke oscillation movement is provided here by means of the workpiece drive
  • a low-frequency, long-stroke oscillation movement is provided by means of the tool drives.
  • the first tool drive comprises a first tool holder for holding the first finishing tool and if the second tool drive comprises a second tool holder for holding the second finishing tool and if the first tool holder and the second tool holder are mounted on a common frame.
  • the common frame allows a space-saving arrangement of all finishing tools, especially in an alternating arrangement of first and second finishing tools.
  • the position of the first tool holder and / or of the second tool holder on the frame is adjustable in a direction perpendicular to the workpiece axis. As a result, a simple loading and unloading of a workpiece holder is made possible.
  • the first finishing tool and / or the second finishing tool may be a finishing belt or a finishing stone.
  • These finishing tools have a working width, which is determined by the bandwidth for a finishing belt and by the stone width in the case of a finishing stone.
  • pressing elements or shells are used, which are well known from the prior art.
  • For handling a finishing stone finishing stone holder are used, which are also well known from the prior art.
  • the invention further relates to a system for finish machining of workpieces in the form of crankshafts or camshafts, comprising different crankshafts or camshafts with differing main bearing widths and / or additional bearing widths.
  • the present invention has the further object of providing a system for finishing of crankshafts or camshafts, with which the set-up effort for the production of crankshafts or camshafts with different geometries can be reduced.
  • This object is achieved in that it comprises a device described above and that the effective width of the first finishing tool is equal to or smaller than the smallest main bearing width of the different crankshafts or camshafts and / or that the effective width of the second finishing tool is equal to or smaller than that smallest additional bearing width of the different crankshafts or camshafts is.
  • FIG. 1 An embodiment of a device for finish machining a workpiece is shown in FIG. 1 generally designated by the reference numeral 10.
  • the device 10 comprises a workpiece area 12 and a tool area 14.
  • the workpiece area 12 comprises a workpiece holder 16 for holding a workpiece in the form of a crankshaft 18 or in the form of a camshaft.
  • the invention will be described below with reference to a workpiece in the form of the crankshaft 18, which main bearings and additional bearings in the form of Has connecting rod bearings.
  • all embodiments apply in a corresponding manner for camshafts, which have concentric main bearings to a camshaft axis and radially offset to the camshaft axis additional bearing in the form of cam surfaces.
  • the workpiece holder 16 includes, for example, a headstock 20 with a rotary drive 22 for rotation of the crankshaft 18 about the workpiece axis 24.
  • the workpiece holder 16 further includes a tailstock 26 which is adjustable along the workpiece axis 24, between crankshaft 20 and tailstock 26 different lengths crankshafts 18th to be able to clamp.
  • the workpiece holder 16, in particular the composite of headstock 20, crankshaft 18 and tailstock 26 is arranged in a preferred embodiment on a support 28 which is displaceable by means of a workpiece drive 30 in an oscillating, parallel to the workpiece axis 24 extending movement.
  • the workpiece drive 30 comprises, for example, an eccentric 32.
  • the crankshaft 18 has a plurality of main bearings 34, which extend concentrically with the workpiece axis 24, and a plurality of connecting rod bearings 36, which are offset eccentrically to the workpiece axis 24 on.
  • the main bearing 34 and connecting rod bearing 36 are alternately, so alternately arranged.
  • an alternating arrangement also means an arrangement in which a plurality of connecting rod bearings 36 are arranged between two main bearings 34 following one another in the longitudinal direction of the crankshaft 18.
  • the tool area 14 comprises a frame 38 with a frame part 40.
  • the frame part 40 serves to guide a tool carrier 42 in a direction perpendicular to the workpiece axis 24.
  • a first tool holder 44 and a second tool holder 46 are arranged on the tool carrier 42.
  • the tool holders 44, 46 are guided parallel to the workpiece axis 24 on the tool carrier 42.
  • a tool drive assigned to only one of the tool holders 44, 46 is provided in each case.
  • a first tool drive 48 (for example in the form of an eccentric) serves to drive the first tool holder 44 along a first tool holder axis 50 parallel to the workpiece axis 24.
  • a second tool drive 52 (for example in the form of an eccentric) serves to drive the tool holder 46 along one of the Workpiece axis 24 parallel tool holder axis 54.
  • Tool drives 48, 52 in the form of eccentrics have the advantage that an oscillation stroke adjustment is possible by appropriate control of a drive of the eccentric. If, for example, an eccentric is driven by a pivoting drive, the oscillation stroke can be adjusted by selecting a pivoting angle between 0 Ā° and 180 Ā°. With swivel angles greater than or equal to 180 Ā°, a rotary drive rotating in one direction can also be used. The oscillation stroke of a tool holder 44, 46 (the distance between the extreme positions) is then equal to twice the distance between the eccentric and the rotary drive axis.
  • the first tool holder 44 serves to hold a group of first finishing tools 56, each of which serves to machine a main bearing 34.
  • the second tool holder 46 serves to arrange a plurality of second finishing tools 58, which each serve to machine a connecting rod bearing 36.
  • the workpiece carrier 42 is positionable perpendicular to the workpiece axis 24 (in directions indicated by reference numeral 60) relative to the frame member 40 to facilitate a loading and unloading operation of the workpiece holder 16.
  • the first finishing tools 56 have a working width 62 measured parallel to the workpiece axis 24.
  • the effective width 62 is equal to or smaller than the smallest main bearing width 64 of a plurality of crankshafts 18 having different main bearing widths 64.
  • an effective width of the second finishing tools 58 is equal to or smaller than the smallest connecting rod bearing width of a plurality of different crankshafts 18.
  • bearing arrangements 72 For arranging in each case a second finishing tool 58 on the second tool holder 46, preferably bearing arrangements 72 described below can be used. These storage facilities are also described in detail in European patent application no. 12152051, filed on January 23, 2012 by the same Applicant. In addition to the following description of the storage facilities 72 is in terms of the structure and operation of the storage facilities 72 also on the Content of European patent application no. 12152051 Referenced.
  • the bearing device 72 is used for mounting a subsequently explained in more detail pressing device 74 on the second tool holder 46.
  • a connecting portion 76 is provided for connecting the bearing device 72 with the second tool holder 46. It is preferred if the relative position between connecting portion 76 and tool holder 46 is adjustable in the direction parallel to and / or perpendicular to the workpiece axis 24 (for example by means of corresponding guide means) and if after reaching a desired position of the connecting portion 76 it is fixed to the tool holder 46, for example by blocking or jamming the guide means.
  • the pressing device 74 presses a second finishing tool 58, for example in the form of a finishing strip, against a connecting rod bearing 36 of the crankshaft 18.
  • the finishing belt is guided on a finishing belt guide 78, for example in the form of a deflection roller 80.
  • the connecting rod bearing 36 extends concentrically to an additional axis 82 which extends parallel to and spaced from the workpiece axis 24 of the crankshaft 18.
  • the bearing device 72 therefore has two degrees of freedom for supporting the pressing device 74 on the second tool holder 46, which allows a movement of the pressing device 74 within a plane perpendicular to the workpiece axis 24.
  • the bearing device 72 comprises a pivoting part 84, which is held by means of a pivot bearing 86 about a pivot axis 88 pivotally connected to the connecting portion 76.
  • the pivot axis 88 extends parallel to the workpiece axis 24.
  • the pivoting part 84 serves to arrange at least one linear guide 90, by means of which a bearing part 92 is mounted so as to be displaceable relative to the pivoting part 84 along a guide axis 94 of the linear guide 90.
  • the bearing part 92 extends substantially within a plane perpendicular to the workpiece axis 24 extending plane.
  • the bearing part 92 has an opening 96, which is penetrated by the pivot bearing 86.
  • the bearing part 92 has a crankshaft 18 facing bearing part end 98 for the arrangement of the pressing device 74.
  • the pressing device 74 comprises at least one pressing part 100, preferably two pressing parts 100, which is or are formed, for example, in the form of forceps arms 102.
  • the forceps arms 102 are relative to the bearing part 92 about Andschreibschwenkachsen 104th pivotable.
  • the pressing pivot axes 104 extend parallel to the pivot axis 88 of the pivoting part 84.
  • the pliers arms 102 have, at their end facing the crankshaft 18, pressure elements 106, which are in particular dish-shaped, so that a finishing tool 58 designed as a finishing belt can be pressed against this along a partial circumference of the connecting rod bearing 36.
  • the pressing device 74 comprises a pressing drive 108, which acts on the pressing elements 106 with a pressing force.
  • the pressure drive 108 is designed, for example, in the form of a hydraulic unit 110, which acts on the pressure elements 106 with pressure forces 112.
  • the pressure drive 108 and the pressure elements 106 are arranged on sides of the forceps arms 102 which are remote from one another with respect to the pressure pivot axes 104. In this way, opposing pressure forces 112 can be diverted into mutually facing pressure forces 114.
  • the bearing means 72 thus forms a pivot / thrust bearing for each of the second finishing tools 58 and provides for pivotal and linear movement of the finishing tool 58 relative to the second tool holder 46.
  • this is by means of the workpiece drive 30 and the tool holder 16 in an oscillating movement with a first, smaller Oszillationshub 66 (see FIG. 2 ).
  • This movement is generated by means of the first tool drive 48 overlay stroke 68 of the superimposed first finishing tool 56.
  • the superposition stroke 68 is preferably larger than the oscillation stroke 66. Further, it is preferable that the oscillation frequency of the superposition stroke 68 is smaller than the oscillation frequency of the oscillation stroke 66.
  • the second finishing tools 58 are also set in oscillating motion by means of the second tool drive 52, which in FIG. 1 indicated by the reference numeral 70.
  • the connecting rod bearings 36 can be processed by the processing of the main bearing 34 independently in one operation or in the same clamping, with a Matterlagerungshub is provided for both the connecting rod bearings 36 and 34 for the main bearing.
  • the workpiece drive 30 it is also possible to use the workpiece drive 30 to generate an oscillating movement of the crankshaft 18 and to apply only a group of finishing tools, ie the first finishing tools 56 or the second finishing tools 58, with an overlay stroke. In this case, it is possible that only a single workpiece drive (48 or 52) is provided.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Turning (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Drilling And Boring (AREA)

Description

Die Erfindung betrifft eine Vorrichtung mit den Merkmalen des Oberbegriffs des Patentanspruchs 1.The invention relates to a device having the features of the preamble of patent claim 1.

Aus der DE 44 23 422 A1 ist ein Verfahren zur AuƟen-Feinstbearbeitung eines rotationssymmetrischen Kƶrpers bekannt, bei welchem der Kƶrper rotierend bewegt wird, ein Finishwerkzeug in zu der Rotationsachse paralleler Richtung oszillierend bewegt wird und bei welchem der oszillierenden Bewegung des Finishwerkzeugs eine weitere Bewegung in zu der Rotationsachse paralleler Richtung Ć¼berlagert wird.From the DE 44 23 422 A1 a method for external microfinishing of a rotationally symmetrical body is known in which the body is rotated, a finishing tool is moved in an oscillating manner parallel to the axis of rotation and in which the oscillating Movement of the finishing tool is superimposed on a further movement in the direction parallel to the axis of rotation.

Dieses Verfahren ist auch unter dem Stichwort "Finishbearbeitung mit Ɯberlagerungshub" bekannt und hat den Vorteil, dass ein Profil einer finishend bearbeiteten WerkstĆ¼ckflƤche von einer zylindrischen MantelflƤche abweichend einstellbar ist. Auf diese Weise kann beispielsweise eine leicht ballig geformte KurbelwellenlagerflƤche erzeugt werden.This method is also known under the heading "finish machining with overlay stroke" and has the advantage that a profile of a finish-machined workpiece surface can be set differently from a cylindrical jacket surface. In this way, for example, a slightly spherical shaped crankshaft bearing surface can be generated.

Das aus der DE 44 23 422 A1 bekannte Verfahren hat jedoch den Nachteil, dass es zum Einrichten der Finishvorrichtung fĆ¼r eine Kurbelwelle oder eine Nockenwelle mit einer bestimmten Geometrie einen relativ hohen RĆ¼staufwand erfordert. Die fĆ¼r die Finishbearbeitung relevanten Abmessungen solcher WerkstĆ¼cke sind insbesondere die Durchmesser und Sitzbreite der zu bearbeitenden Hauptlager und Zusatzlager, der achsparallele Abstand der Lager relativ zueinander und Versatz des Zusatzlagers zu der WerkstĆ¼ckachse.That from the DE 44 23 422 A1 However, known method has the disadvantage that it requires a relatively high set-up effort to set up the finishing device for a crankshaft or a camshaft with a certain geometry. The relevant for finishing machining dimensions of such workpieces are in particular the diameter and seat width of the main bearing to be machined and additional bearings, the axis-parallel distance between the bearings relative to each other and offset of the additional bearing to the workpiece axis.

Aus der DE 10 2007 059 926 A1 ist eine Vorrichtung zur Finishbearbeitung von Nocken- oder Kurbelwellen bekannt, mit einer ersten Gruppe von ersten Finisheinheiten und mit einer zweiten Gruppe von zweiten Finisheinheiten, wobei die Finisheinheiten in axialer Richtung gesehen abwechselnd der ersten Gruppe und der zweiten Gruppe zugeordnet sind und wobei die erste Gruppe und die zweite Gruppe relativ zueinander winkelversetzt angeordnet sind.From the DE 10 2007 059 926 A1 a device for finishing machining of camshafts or crankshafts is known, having a first group of first finishing units and a second group of second finishing units, wherein the finishing units are seen in the axial direction alternately assigned to the first group and the second group and wherein the first group and the second group are arranged angularly offset relative to each other.

Im Motorenbau gibt es eine Entwicklung dahingehend, die fĆ¼r unterschiedliche Motoren mit unterschiedlichen Zylinderzahlen relevanten Abmessungen zu vereinheitlichen und beispielsweise das StichmaƟ der Motoren (den Abstand zwischen den Zylinderachsen) unabhƤngig von der Anzahl der Zylinder identisch auszuwƤhlen und auch weitestgehend identische Hauptlagerdurchmesser und -sitzbreiten zu verwenden.In engine construction there is a development to unify the relevant for different engines with different cylinder numbers dimensions and, for example, the pitch of the engine (the distance between the cylinder axes) regardless of the number of cylinders to select identical and also to use largely identical main bearing diameter and seat widths.

Im Hinblick auf das Bestreben, eine Vielzahl unterschiedlicher Motoren wirtschaftlich zu fertigen, ist es erwĆ¼nscht, dass auch die Finishbearbeitung der Haupt- und Pleuellager einer Kurbelwelle und der Hauptlager und NockenflƤchen einer Nockenwelle mit einem mƶglichst geringen Aufwand durchfĆ¼hrbar ist.In view of the desire to produce a variety of different engines economically, it is desirable that the finishing of the main and connecting rod bearings of a crankshaft and the main bearing and cam surfaces of a camshaft with the least possible effort is feasible.

Hiervon ausgehend liegt der vorliegenden Erfindung die Aufgabe zugrunde, eine Vorrichtung zur Finishbearbeitung von Kurbelwellen oder Nockenwellen zu schaffen, mit welcher der RĆ¼staufwand zur Herstellung von Kurbelwellen oder Nockenwellen mit unterschiedlichen Geometrien reduziert werden kann.Proceeding from this, the present invention has the object to provide a device for finish machining of crankshafts or camshafts, with which the setup effort for the production of crankshafts or camshafts with different geometries can be reduced.

Diese Aufgabe wird bei einer Vorrichtung der eingangs genannten Art erfindungsgemƤƟ durch die kennzeichnenden Merkmale des Patentanspruchs 1 gelƶst.This object is achieved according to the invention in a device of the type mentioned by the characterizing features of claim 1.

ErfindungsgemƤƟ werden die Bewegungen des ersten Finishwerkzeugs und des zweiten Finishwerkzeugs in zu der WerkstĆ¼ckachse paralleler Richtung voneinander entkoppelt. Beispielsweise ist ein Werkzeugantrieb vorgesehen, welcher ausschlieƟlich das erste Finishwerkzeug zur Bearbeitung eines Hauptlagers oder eine Gruppe von ersten Finishwerkzeugen zur Bearbeitung einer Gruppe von Hauptlagern in eine zu der WerkstĆ¼ckachse parallel gerichtete Bewegung versetzt. ZusƤtzlich hierzu ist ein Werkzeugantrieb vorgesehen, welcher ausschlieƟlich das zweite Finishwerkzeug zur Bearbeitung eines Zusatzlagers (also eines Pleuellagers oder einer NockenflƤche) oder eine Gruppe von zweiten Finishwerkzeugen zur Bearbeitung einer Gruppe von Zusatzlagern in zu der WerkstĆ¼ckachse paralleler Richtung antreibt.According to the invention, the movements of the first finishing tool and the second finishing tool are decoupled from each other in the direction parallel to the workpiece axis. For example, a tool drive is provided, which puts only the first finishing tool for machining a main bearing or a group of first finishing tools for machining a group of main bearings in a direction parallel to the workpiece axis movement. In addition to this, a tool drive is provided, which exclusively the second finishing tool for machining an additional bearing (ie a connecting rod bearing or a cam surface) or a Group of second finishing tools for machining a group of additional bearings in parallel to the workpiece axis direction drives.

Die erfindungsgemƤƟe Entkopplung der Bewegung des ersten Finishwerkzeugs und des zweiten Finishwerkzeugs ermƶglicht eine flexible Bearbeitung unterschiedlicher Kurbelwellen, welche voneinander abweichende Hauptlagerbreiten und/oder Pleuellagerbreiten aufweisen oder unterschiedlicher Nockenwellen, welche voneinander abweichende Hauptlagerbreiten und/oder NockenflƤchenbreiten aufweisen. Im Rahmen der Erfindung ist es mƶglich, das mit einem Werkzeugantrieb gekoppelte Finishwerkzeug im Hinblick auf die kleinste herzustellende Lagerbreite auszuwƤhlen und mit einem solchen Finishwerkzeug auch grĆ¶ĆŸer dimensionierte Lagerbreiten zu bearbeiten, indem der Werkzeugantrieb zur Bereitstellung eines zu der WerkstĆ¼ckachse parallel verlaufenden Oszillationshubs verwendet wird.The decoupling according to the invention of the movement of the first finishing tool and the second finishing tool enables flexible machining of different crankshafts, which have different main bearing widths and / or connecting rod bearing widths or different camshafts, which have different main bearing widths and / or cam surface widths. In the context of the invention, it is possible to select the tool coupled with a tool drive finishing tool with respect to the smallest bearing width to be produced and machined with such a finishing tool also larger-sized bearing widths by the tool drive is used to provide a parallel to the workpiece axis Oszillationshubs.

Vorzugsweise sind lƤngs der WerkstĆ¼ckachse gesehen erste Finishwerkzeuge und zweite Finishwerkzeuge einander alternierend angeordnet, sodass die Hauptlager und Zusatzlager eines WerkstĆ¼cks in derselben Aufspannung (also in demselben WerkstĆ¼ckhalter gehalten; vorzugsweise in unverƤnderter Position des WerkstĆ¼ckhalters) finishend bearbeitbar sind.Preferably, as seen along the workpiece axis, first finishing tools and second finishing tools are arranged alternately, so that the main bearings and auxiliary bearings of a workpiece are machined finish-in the same clamping (ie, in the same workpiece holder, preferably in the unchanged position of the workpiece holder).

Bei einer besonders bevorzugten AusfĆ¼hrungsform der Erfindung ist ein WerkstĆ¼ckantrieb zur Erzeugung einer oszillierenden Bewegung des WerkstĆ¼cks in zu der WerkstĆ¼ckachse paralleler Richtung vorgesehen. In Verbindung mit mindestens einem Werkzeugantrieb kann zumindest fĆ¼r eine Gruppe von Finishwerkzeugen (beispielsweise fĆ¼r die ersten Finishwerkzeuge zur Bearbeitung der Hauptlager) ein Ɯberlagerungshub bereitgestellt werden.In a particularly preferred embodiment of the invention, a workpiece drive is provided for generating an oscillating movement of the workpiece in a direction parallel to the workpiece axis. In connection with at least one tool drive can be at least for a group of finishing tools (for example, for the first finishing tools for Processing of the main bearings) a Ɯberlagerungshub be provided.

Vorzugsweise ist der WerkstĆ¼ckantrieb zur Erzeugung einer hƶheren Oszillationsfrequenz und/oder einem kleineren Oszillationshub ausgelegt als mindestens einer der Werkzeugantriebe. Hierbei ist es vorteilhaft, dass der Werkzeughalter und das WerkstĆ¼ck eine im Vergleich zu den Finishwerkzeugen relativ steife Baugruppe bilden, welche fĆ¼r einen hochdynamischen Antrieb besser geeignet ist als die Finishwerkzeuge.Preferably, the workpiece drive for generating a higher oscillation frequency and / or a smaller oscillation stroke is designed as at least one of the tool drives. Here, it is advantageous that the tool holder and the workpiece form a relatively stiff compared to the finishing tools assembly, which is better suited for a highly dynamic drive than the finishing tools.

ErfindungsgemƤƟ ist ein erster Werkzeugantrieb zur Erzeugung einer oszillierenden Bewegung des Finishwerkzeugs in zu der WerkstĆ¼ckachse paralleler Richtung und ein zweiter Werkzeugantrieb zur Erzeugung einer oszillierenden, von der Bewegung des ersten Finishwerkzeugs unabhƤngigen Bewegung des zweiten Finishwerkzeugs in zu der WerkstĆ¼ckachse paralleler Richtung vorgesehen. Hierdurch ist es mƶglich, sowohl das erste Finishwerkzeug oder eine Gruppe von ersten Finishwerkzeugen als auch das zweite Finishwerkzeug oder eine Gruppe von zweiten Finishwerkzeugen voneinander unabhƤngig parallel zu der WerkstĆ¼ckachse hin und her zu bewegen.According to the invention, a first tool drive is provided for generating an oscillating movement of the finishing tool in a direction parallel to the workpiece axis and a second tool drive for generating an oscillating, independent of the movement of the first finishing tool movement of the second finishing tool in parallel to the workpiece axis direction. This makes it possible to reciprocate both the first finishing tool or a group of first finishing tools as well as the second finishing tool or a group of second finishing tools independently of each other parallel to the workpiece axis.

Bei Verwendung eines ersten Werkzeugantriebs und eines zweiten Werkzeugantriebs ist es mƶglich, auf einen WerkstĆ¼ckantrieb zur Erzeugung einer oszillierenden Bewegung des WerkstĆ¼cks in zu der WerkstĆ¼ckachse paralleler Richtung zu verzichten. In diesem Fall erfolgt die Bereitstellung der oszillierenden Bewegung der Finishwerkzeuge ausschlieƟlich Ć¼ber die beiden Werkzeugantriebe.When using a first tool drive and a second tool drive, it is possible to dispense with a workpiece drive for generating an oscillating movement of the workpiece in parallel to the workpiece axis direction. In this case, the provision of the oscillating movement of the finishing tools takes place exclusively via the two tool drives.

Bei Kombination von zwei Werkzeugantrieben zur Erzeugung oszillierender, voneinander unabhƤngiger Bewegungen der ersten Finishwerkzeuge und der zweiten Finishwerkzeuge mit einem WerkstĆ¼ckantrieb zur Erzeugung einer oszillierenden Bewegung des WerkstĆ¼cks in zu der WerkstĆ¼ckachse paralleler Richtung kann sowohl fĆ¼r die Hauptlager als auch fĆ¼r die Zusatzlager ein Ɯberlagerungshub bereitgestellt werden. Vorzugsweise wird hierbei mittels des WerkstĆ¼ckantriebs eine hƶherfrequente, kurzhubige Oszillationsbewegung bereitgestellt und mittels der Werkzeugantriebe eine niederfrequente, langhubige Oszillationsbewegung. Alternativ hierzu ist es aber auch denkbar, dass mittels des WerkstĆ¼ckantriebs eine niederfrequente, langhubige Oszillationsbewegung bereitgestellt wird und mittels der Werkzeugantriebe eine hƶherfrequente, kurzhubige Oszillationsbewegung.With the combination of two tool drives for generating oscillating, independent movements of the first finishing tools and the second finishing tools with a workpiece drive for generating an oscillating movement of the workpiece in parallel to the workpiece axis direction, a Ɯberlagerungshub can be provided for both the main bearing and the additional storage. Preferably, a higher-frequency, short-stroke oscillation movement is provided here by means of the workpiece drive, and a low-frequency, long-stroke oscillation movement is provided by means of the tool drives. Alternatively, it is also conceivable that by means of the workpiece drive a low-frequency, long-stroke oscillation movement is provided and by means of Tool drives a higher-frequency, short-stroke oscillation movement.

Es ist vorteilhaft, wenn der erste Werkzeugantrieb einen ersten Werkzeughalter zum Halten des ersten Finishwerkzeugs und wenn der zweite Werkzeugantrieb einen zweiten Werkzeughalter zum Halten des zweiten Finishwerkzeugs umfasst und wenn der erste Werkzeughalter und der zweite Werkzeughalter an einem gemeinsamen Gestell gelagert sind. Das gemeinsame Gestell ermƶglicht eine raumsparende Anordnung sƤmtlicher Finishwerkzeuge, insbesondere bei einer alternierenden Anordnung von ersten und zweiten Finishwerkzeugen.It is advantageous if the first tool drive comprises a first tool holder for holding the first finishing tool and if the second tool drive comprises a second tool holder for holding the second finishing tool and if the first tool holder and the second tool holder are mounted on a common frame. The common frame allows a space-saving arrangement of all finishing tools, especially in an alternating arrangement of first and second finishing tools.

Besonders bevorzugt ist es, wenn die Position des ersten Werkzeughalters und/oder des zweiten Werkzeughalters an dem Gestell in zu der WerkstĆ¼ckachse senkrechter Richtung einstellbar ist. Hierdurch wird eine einfache Beladung und Entladung eines WerkstĆ¼ckhalters ermƶglicht.It is particularly preferable if the position of the first tool holder and / or of the second tool holder on the frame is adjustable in a direction perpendicular to the workpiece axis. As a result, a simple loading and unloading of a workpiece holder is made possible.

Bei dem ersten Finishwerkzeug und/oder dem zweiten Finishwerkzeug kann es sich um ein Finishband oder um einen Finishstein handeln. Diese Finishwerkzeuge weisen eine Wirkbreite auf, welche bei einem Finishband durch die Bandbreite und bei einem Finishstein durch die Steinbreite bestimmt ist. Zum AndrĆ¼cken eines Finishbands gegen eine zu bearbeitende WerkstĆ¼ckoberflƤche kommen sogenannte AndrĆ¼ckelemente oder -schalen zum Einsatz, welche aus dem Stand der Technik hinlƤnglich bekannt sind. Zur Handhabung eines Finishsteins kommen Finishsteinhalter zum Einsatz, welche ebenfalls hinlƤnglich aus dem Stand der Technik bekannt sind.The first finishing tool and / or the second finishing tool may be a finishing belt or a finishing stone. These finishing tools have a working width, which is determined by the bandwidth for a finishing belt and by the stone width in the case of a finishing stone. For pressing a finishing strip against a workpiece surface to be machined so-called pressing elements or shells are used, which are well known from the prior art. For handling a finishing stone finishing stone holder are used, which are also well known from the prior art.

Die Erfindung betrifft ferner ein System zur Finishbearbeitung von WerkstĆ¼cken in Form von Kurbelwellen oder Nockenwellen, umfassend unterschiedliche Kurbelwellen oder Nockenwellen mit voneinander abweichenden Hauptlagerbreiten und/oder Zusatzlagerbreiten.The invention further relates to a system for finish machining of workpieces in the form of crankshafts or camshafts, comprising different crankshafts or camshafts with differing main bearing widths and / or additional bearing widths.

Der vorliegenden Erfindung liegt die weitere Aufgabe zugrunde, ein System zur Finishbearbeitung von Kurbelwellen oder Nockenwellen zu schaffen, mit welchem der RĆ¼staufwand zur Herstellung von Kurbelwellen oder Nockenwellen mit unterschiedlichen Geometrien reduziert werden kann.The present invention has the further object of providing a system for finishing of crankshafts or camshafts, with which the set-up effort for the production of crankshafts or camshafts with different geometries can be reduced.

Diese Aufgabe wird erfindungsgemƤƟ dadurch gelƶst, dass es eine vorstehend beschriebene Vorrichtung umfasst und dass die Wirkbreite des ersten Finishwerkzeugs gleich oder kleiner ist als die kleinste Hauptlagerbreite der unterschiedlichen Kurbelwellen oder Nockenwellen ist und/oder dass die Wirkbreite des zweiten Finishwerkzeugs gleich oder kleiner ist als die kleinste Zusatzlagerbreite der unterschiedlichen Kurbelwellen oder Nockenwellen ist. Vorteile und Ausgestaltungen des erfindungsgemƤƟen Systems wurden bereits vorstehend unter Bezugnahme auf die erfindungsgemƤƟe Vorrichtung beschrieben. Auf diese Beschreibung wird hiermit Bezug genommen.This object is achieved in that it comprises a device described above and that the effective width of the first finishing tool is equal to or smaller than the smallest main bearing width of the different crankshafts or camshafts and / or that the effective width of the second finishing tool is equal to or smaller than that smallest additional bearing width of the different crankshafts or camshafts is. Advantages and embodiments of the system according to the invention have already been described above with reference to the device according to the invention. This description is hereby incorporated by reference.

Weitere Vorteile und Ausgestaltungen der erfindungsgemƤƟen Vorrichtung und des erfindungsgemƤƟen Systems sowie weitere Merkmale der Erfindung sind Gegenstand der nachfolgenden Beschreibung und der zeichnerischen Darstellung einer bevorzugter AusfĆ¼hrungsform.Further advantages and embodiments of the device according to the invention and the system according to the invention as well as further features of the invention are the subject matter of the following description and the diagrammatic representation of a preferred embodiment.

In der Zeichnung zeigen:

Fig. 1
eine Draufsicht einer AusfĆ¼hrungsform einer Vorrichtung zur Finishbearbeitung eines WerkstĆ¼cks;
Fig. 2
einen in Fig. 1 mit II bezeichneten Ausschnitt in vergrĆ¶ĆŸerter Darstellung; und
Fig. 3
eine Seitenansicht eines Teils der Vorrichtung gemƤƟ Fig. 1 gemƤƟ einer in Fig. 1 mit einem Pfeil III bezeichneten Blickrichtung.
In the drawing show:
Fig. 1
a plan view of an embodiment of a device for finish machining a workpiece;
Fig. 2
one in Fig. 1 with II designated section in an enlarged view; and
Fig. 3
a side view of a portion of the device according to Fig. 1 according to a in Fig. 1 with a direction of arrow III.

Einer AusfĆ¼hrungsform einer Vorrichtung zur Finishbearbeitung eines WerkstĆ¼cks ist in Figur 1 insgesamt mit dem Bezugszeichen 10 bezeichnet. Die Vorrichtung 10 umfasst einen WerkstĆ¼ckbereich 12 und einen Werkzeugbereich 14.An embodiment of a device for finish machining a workpiece is shown in FIG FIG. 1 generally designated by the reference numeral 10. The device 10 comprises a workpiece area 12 and a tool area 14.

Der WerkstĆ¼ckbereich 12 umfasst einen WerkstĆ¼ckhalter 16 zum Halten eines WerkstĆ¼cks in Form einer Kurbelwelle 18 oder in Form einer Nockenwelle. Die Erfindung wird nachfolgend anhand eines WerkstĆ¼cks in Form der Kurbelwelle 18, welche Hauptlager und Zusatzlager in Form von Pleuellagern aufweist. SƤmtliche AusfĆ¼hrungen gelten aber in entsprechender Weise fĆ¼r Nockenwellen, welche zu einer Nockenwellenachse konzentrische Hauptlager aufweisen und zur Nockenwellenachse radial versetzte Zusatzlager in Form von NockenflƤchen.The workpiece area 12 comprises a workpiece holder 16 for holding a workpiece in the form of a crankshaft 18 or in the form of a camshaft. The invention will be described below with reference to a workpiece in the form of the crankshaft 18, which main bearings and additional bearings in the form of Has connecting rod bearings. However, all embodiments apply in a corresponding manner for camshafts, which have concentric main bearings to a camshaft axis and radially offset to the camshaft axis additional bearing in the form of cam surfaces.

Der WerkstĆ¼ckhalter 16 umfasst beispielsweise einen Spindelstock 20 mit einem Rotationsantrieb 22 zur Rotation der Kurbelwelle 18 um deren WerkstĆ¼ckachse 24. Der WerkstĆ¼ckhalter 16 umfasst ferner einen Reitstock 26, welcher lƤngs der WerkstĆ¼ckachse 24 verstellbar ist, um zwischen Spindelstock 20 und Reitstock 26 unterschiedlich lange Kurbelwellen 18 einspannen zu kƶnnen.The workpiece holder 16 includes, for example, a headstock 20 with a rotary drive 22 for rotation of the crankshaft 18 about the workpiece axis 24. The workpiece holder 16 further includes a tailstock 26 which is adjustable along the workpiece axis 24, between crankshaft 20 and tailstock 26 different lengths crankshafts 18th to be able to clamp.

Der WerkstĆ¼ckhalter 16, insbesondere der Verbund aus Spindelstock 20, Kurbelwelle 18 und Reitstock 26, ist bei einer bevorzugten AusfĆ¼hrungsform auf einem TrƤger 28 angeordnet, welcher mittels eines WerkstĆ¼ckantriebs 30 in eine oszillierende, parallel zur WerkstĆ¼ckachse 24 verlaufende Bewegung versetzbar ist. Der WerkstĆ¼ckantrieb 30 umfasst beispielsweise einen Exzenter 32.The workpiece holder 16, in particular the composite of headstock 20, crankshaft 18 and tailstock 26 is arranged in a preferred embodiment on a support 28 which is displaceable by means of a workpiece drive 30 in an oscillating, parallel to the workpiece axis 24 extending movement. The workpiece drive 30 comprises, for example, an eccentric 32.

Die Kurbelwelle 18 weist eine Mehrzahl von Hauptlagern 34, welche sich konzentrisch zu der WerkstĆ¼ckachse 24 erstrecken, und eine Mehrzahl von Pleuellagern 36, welche zu der WerkstĆ¼ckachse 24 exzentrisch versetzt sind, auf. Die Hauptlager 34 und Pleuellager 36 sind einander alternierend, also einander abwechselnd, angeordnet. Unter einer alternierenden Anordnung wird im Rahmen der Erfindung auch eine Anordnung verstanden, bei welcher eine Mehrzahl von Pleuellagern 36 zwischen zwei einander in LƤngsrichtung der Kurbelwelle 18 folgenden Hauptlagern 34 angeordnet sind, verstanden.The crankshaft 18 has a plurality of main bearings 34, which extend concentrically with the workpiece axis 24, and a plurality of connecting rod bearings 36, which are offset eccentrically to the workpiece axis 24 on. The main bearing 34 and connecting rod bearing 36 are alternately, so alternately arranged. In the context of the invention, an alternating arrangement also means an arrangement in which a plurality of connecting rod bearings 36 are arranged between two main bearings 34 following one another in the longitudinal direction of the crankshaft 18.

Der Werkzeugbereich 14 umfasst ein Gestell 38 mit einem Gestellteil 40. Das Gestellteil 40 dient zur FĆ¼hrung eines WerkzeugtrƤgers 42 in einer zu der WerkstĆ¼ckachse 24 senkrechten Richtung.The tool area 14 comprises a frame 38 with a frame part 40. The frame part 40 serves to guide a tool carrier 42 in a direction perpendicular to the workpiece axis 24.

An dem WerkzeugtrƤger 42 sind ein erster Werkzeughalter 44 und ein zweiter Werkzeughalter 46 angeordnet. Die Werkzeughalter 44, 46 sind parallel zu der WerkstĆ¼ckachse 24 an dem WerkzeugtrƤger 42 gefĆ¼hrt.On the tool carrier 42, a first tool holder 44 and a second tool holder 46 are arranged. The tool holders 44, 46 are guided parallel to the workpiece axis 24 on the tool carrier 42.

Zum Antrieb der Werkzeughalter 44, 46 in einer zu der WerkstĆ¼ckachse 24 parallelen Richtung ist jeweils ein nur einem der Werkzeughalter 44, 46 zugeordneter Werkzeugantrieb vorgesehen. Ein erster Werkzeugantrieb 48 (beispielsweise in Form eines Exzenters) dient zum Antrieb des ersten Werkzeughalters 44 lƤngs einer zu der WerkstĆ¼ckachse 24 parallelen ersten Werkzeughalterachse 50. Ein zweiter Werkzeugantrieb 52 (beispielsweise in Form eines Exzenters) dient zum Antrieb des Werkzeughalters 46 lƤngs einer zu der WerkstĆ¼ckachse 24 parallelen Werkzeughalterachse 54.In order to drive the tool holders 44, 46 in a direction parallel to the workpiece axis 24, a tool drive assigned to only one of the tool holders 44, 46 is provided in each case. A first tool drive 48 (for example in the form of an eccentric) serves to drive the first tool holder 44 along a first tool holder axis 50 parallel to the workpiece axis 24. A second tool drive 52 (for example in the form of an eccentric) serves to drive the tool holder 46 along one of the Workpiece axis 24 parallel tool holder axis 54.

Werkzeugantriebe 48, 52 in Form von Exzentern haben den Vorteil, dass durch entsprechende Ansteuerung eines Antriebs der Exzenter eine Oszillationshubeinstellung mƶglich ist. Wenn beispielsweise ein Exzenter mit einem Schwenkantrieb angetrieben ist, kann durch Wahl eines Schwenkwinkels zwischen 0Ā° und 180Ā° der Oszillationshub eingestellt werden. Bei Schwenkwinkeln grĆ¶ĆŸer oder gleich 180Ā° kann auch ein in einer Richtung umlaufender Drehantrieb verwendet werden. Der Oszillationshub eines Werkzeughalters 44, 46 (der Abstand zwischen den Extremlagen) ist dann gleich dem doppelten Abstand der Exzenter- zu der Drehantriebsachse.Tool drives 48, 52 in the form of eccentrics have the advantage that an oscillation stroke adjustment is possible by appropriate control of a drive of the eccentric. If, for example, an eccentric is driven by a pivoting drive, the oscillation stroke can be adjusted by selecting a pivoting angle between 0 Ā° and 180 Ā°. With swivel angles greater than or equal to 180 Ā°, a rotary drive rotating in one direction can also be used. The oscillation stroke of a tool holder 44, 46 (the distance between the extreme positions) is then equal to twice the distance between the eccentric and the rotary drive axis.

Der erste Werkzeughalter 44 dient zum Halten einer Gruppe von ersten Finishwerkzeugen 56, welche jeweils zur Bearbeitung eines Hauptlagers 34 dienen.The first tool holder 44 serves to hold a group of first finishing tools 56, each of which serves to machine a main bearing 34.

Der zweite Werkzeughalter 46 dient zur Anordnung einer Mehrzahl von zweiten Finishwerkzeugen 58, welche jeweils zur Bearbeitung eines Pleuellagers 36 dienen.The second tool holder 46 serves to arrange a plurality of second finishing tools 58, which each serve to machine a connecting rod bearing 36.

Der WerkstĆ¼cktrƤger 42 ist senkrecht zu der WerkstĆ¼ckachse 24 (in mit Bezugszeichen 60 bezeichneten Richtungen) relativ zu dem Gestellteil 40 positionierbar, um einen Belade- und Entladevorgang des WerkstĆ¼ckhalters 16 zu erleichtern.The workpiece carrier 42 is positionable perpendicular to the workpiece axis 24 (in directions indicated by reference numeral 60) relative to the frame member 40 to facilitate a loading and unloading operation of the workpiece holder 16.

Die ersten Finishwerkzeuge 56 weisen eine parallel zur WerkstĆ¼ckachse 24 gemessene Wirkbreite 62 auf. Die Wirkbreite 62 ist gleich oder kleiner als die kleinste Hauptlagerbreite 64 einer Mehrzahl von Kurbelwellen 18 mit unterschiedlichen Hauptlagerbreiten 64.The first finishing tools 56 have a working width 62 measured parallel to the workpiece axis 24. The effective width 62 is equal to or smaller than the smallest main bearing width 64 of a plurality of crankshafts 18 having different main bearing widths 64.

In entsprechender Weise ist eine Wirkbreite der zweiten Finishwerkzeuge 58 gleich oder kleiner als die kleinste Pleuellagerbreite einer Mehrzahl unterschiedlicher Kurbelwellen 18.Correspondingly, an effective width of the second finishing tools 58 is equal to or smaller than the smallest connecting rod bearing width of a plurality of different crankshafts 18.

Zur Anordnung jeweils eines zweiten Finishwerkzeugs 58 an dem zweiten Werkzeughalter 46 kƶnnen vorzugsweise nachfolgend beschriebene Lagereinrichtungen 72 verwendet werden. Diese Lagereinrichtungen sind detailliert auch in der EuropƤischen Patentanmeldung Nr. 12152051, angemeldet am 23. Januar 2012 von derselben Anmelderin, beschrieben. ZusƤtzlich zu der nachfolgenden Beschreibung der Lagereinrichtungen 72 wird hinsichtlich des Aufbaus und der Funktionsweise der Lagereinrichtungen 72 auch auf den Inhalt der EuropƤischen Patentanmeldung Nr. 12152051 Bezug genommen.For arranging in each case a second finishing tool 58 on the second tool holder 46, preferably bearing arrangements 72 described below can be used. These storage facilities are also described in detail in European patent application no. 12152051, filed on January 23, 2012 by the same Applicant. In addition to the following description of the storage facilities 72 is in terms of the structure and operation of the storage facilities 72 also on the Content of European patent application no. 12152051 Referenced.

Die Lagereinrichtung 72 dient zur Lagerung einer nachfolgend noch nƤher erlƤuterten AndrĆ¼ckeinrichtung 74 an dem zweiten Werkzeughalter 46. Zur Verbindung der Lagereinrichtung 72 mit dem zweiten Werkzeughalter 46 ist ein Verbindungsabschnitt 76 vorgesehen. Bevorzugt ist es, wenn die Relativlage zwischen Verbindungsabschnitt 76 und Werkzeughalter 46 in zu der WerkstĆ¼ckachse 24 paralleler und/oder senkrechter Richtung einstellbar ist (beispielsweise mittels entsprechenden FĆ¼hrungseinrichtungen) und wenn nach Erreichen einer Solllage des Verbindungsabschnitts 76 dieser an dem Werkzeughalter 46 fixiert wird, beispielsweise durch Blockieren oder Verklemmen der FĆ¼hrungseinrichtungen.The bearing device 72 is used for mounting a subsequently explained in more detail pressing device 74 on the second tool holder 46. For connecting the bearing device 72 with the second tool holder 46, a connecting portion 76 is provided. It is preferred if the relative position between connecting portion 76 and tool holder 46 is adjustable in the direction parallel to and / or perpendicular to the workpiece axis 24 (for example by means of corresponding guide means) and if after reaching a desired position of the connecting portion 76 it is fixed to the tool holder 46, for example by blocking or jamming the guide means.

Die AndrĆ¼ckeinrichtung 74 drĆ¼ckt ein zweites Finishwerkzeugs 58, beispielsweise in Form eines Finishbands, gegen ein Pleuellager 36 der Kurbelwelle 18. Das Finishband ist an einer FinishbandfĆ¼hrung 78, beispielsweise in Form einer Umlenkrolle 80, gefĆ¼hrt.The pressing device 74 presses a second finishing tool 58, for example in the form of a finishing strip, against a connecting rod bearing 36 of the crankshaft 18. The finishing belt is guided on a finishing belt guide 78, for example in the form of a deflection roller 80.

Das Pleuellager 36 erstreckt sich konzentrisch zu einer Zusatzachse 82, welche parallel und zu der WerkstĆ¼ckachse 24 der Kurbelwelle 18 beabstandet verlƤuft.The connecting rod bearing 36 extends concentrically to an additional axis 82 which extends parallel to and spaced from the workpiece axis 24 of the crankshaft 18.

WƤhrend der Bearbeitung der Kurbelwelle 18 rotiert diese um die WerkstĆ¼ckachse 24. Dabei bewegt sich das Pleuellager 36 dem Abstand der Achsen 24 und 82 entsprechend kreisfƶrmig um die WerkstĆ¼ckachse 24.During the processing of the crankshaft 18, this rotates about the workpiece axis 24. In this case, the connecting rod bearing 36 moves the distance of the axes 24 and 82 in a circular manner about the workpiece axis 24th

Da das Pleuellager 36 sich wie vorstehend erlƤutert kreisfƶrmig um die WerkstĆ¼ckachse 24 herumbewegt, ist es erforderlich, dass auch das Finishwerkzeug 58 (gegebenenfalls gemeinsam mit der FinishbandfĆ¼hrung 78) und somit die AndrĆ¼ckeinrichtung 74 dieser Bewegung des Pleuellagers 36 folgen kƶnnen. Daher weist die Lagereinrichtung 72 zur Lagerung der AndrĆ¼ckeinrichtung 74 an dem zweiten Werkzeughalter 46 zwei Freiheitsgrade auf, welche eine Bewegung der AndrĆ¼ckeinrichtung 74 innerhalb einer zu der WerkstĆ¼ckachse 24 senkrechten Ebene ermƶglicht.Since the connecting rod bearing 36 moves around the workpiece axis 24 in a circular manner as explained above, it is also necessary for the finishing tool 58 to be able to move around (optionally together with the finishing belt guide 78) and thus the pressing device 74 can follow this movement of the connecting rod bearing 36. The bearing device 72 therefore has two degrees of freedom for supporting the pressing device 74 on the second tool holder 46, which allows a movement of the pressing device 74 within a plane perpendicular to the workpiece axis 24.

Die Lagereinrichtung 72 umfasst ein Schwenkteil 84, welches mittels eines Schwenklagers 86 um eine Schwenkachse 88 schwenkbar an dem Verbindungsabschnitt 76 gehalten ist. Die Schwenkachse 88 erstreckt sich parallel zu der WerkstĆ¼ckachse 24.The bearing device 72 comprises a pivoting part 84, which is held by means of a pivot bearing 86 about a pivot axis 88 pivotally connected to the connecting portion 76. The pivot axis 88 extends parallel to the workpiece axis 24.

Das Schwenkteil 84 dient zur Anordnung mindestens einer LinearfĆ¼hrung 90, mittels welcher ein Lagerteil 92 entlang einer FĆ¼hrungsachse 94 der LinearfĆ¼hrung 90 verschiebbar relativ zu dem Schwenkteil 84 gelagert ist.The pivoting part 84 serves to arrange at least one linear guide 90, by means of which a bearing part 92 is mounted so as to be displaceable relative to the pivoting part 84 along a guide axis 94 of the linear guide 90.

Das Lagerteil 92 erstreckt sich im Wesentlichen innerhalb einer senkrecht zu der WerkstĆ¼ckachse 24 verlaufenden Ebene. Das Lagerteil 92 weist eine Durchbrechung 96 auf, welche von dem Schwenklager 86 durchsetzt ist.The bearing part 92 extends substantially within a plane perpendicular to the workpiece axis 24 extending plane. The bearing part 92 has an opening 96, which is penetrated by the pivot bearing 86.

Das Lagerteil 92 weist ein der Kurbelwelle 18 zugewandtes Lagerteilende 98 zur Anordnung der AndrĆ¼ckeinrichtung 74 auf.The bearing part 92 has a crankshaft 18 facing bearing part end 98 for the arrangement of the pressing device 74.

Die AndrĆ¼ckeinrichtung 74 umfasst mindestens ein AndrĆ¼ckteil 100, vorzugsweise zwei AndrĆ¼ckteile 100, das oder die beispielsweise in Form von Zangenarmen 102 ausgebildet ist oder sind. Die Zangenarme 102 sind relativ zu dem Lagerteil 92 um AndrĆ¼ckschwenkachsen 104 verschwenkbar. Die AndrĆ¼ckschwenkachsen 104 verlaufen parallel zu der Schwenkachse 88 des Schwenkteils 84.The pressing device 74 comprises at least one pressing part 100, preferably two pressing parts 100, which is or are formed, for example, in the form of forceps arms 102. The forceps arms 102 are relative to the bearing part 92 about AndrĆ¼ckschwenkachsen 104th pivotable. The pressing pivot axes 104 extend parallel to the pivot axis 88 of the pivoting part 84.

Die Zangenarme 102 weisen an ihrem der Kurbelwelle 18 zugewandten Ende AndrĆ¼ckelemente 106 auf, welche insbesondere schalenfƶrmig ausgebildet sind, sodass ein als Finishband ausgebildetes Finishwerkzeug 58 entlang eines Teilumfangs des Pleuellagers 36 gegen dieses angedrĆ¼ckt werden kann.The pliers arms 102 have, at their end facing the crankshaft 18, pressure elements 106, which are in particular dish-shaped, so that a finishing tool 58 designed as a finishing belt can be pressed against this along a partial circumference of the connecting rod bearing 36.

Zur Erzeugung einer AndrĆ¼ckkraft umfasst die AndrĆ¼ckeinrichtung 74 einen AndrĆ¼ckantrieb 108, welcher die AndrĆ¼ckelemente 106 mit einer AndrĆ¼ckkraft beaufschlagt. Der AndrĆ¼ckantrieb 108 ist beispielsweise in Form einer Hydraulikeinheit 110 ausgebildet, welche die AndrĆ¼ckelemente 106 mit AndrĆ¼ckkrƤften 112 beaufschlagt.To generate a pressing force, the pressing device 74 comprises a pressing drive 108, which acts on the pressing elements 106 with a pressing force. The pressure drive 108 is designed, for example, in the form of a hydraulic unit 110, which acts on the pressure elements 106 with pressure forces 112.

Beispielsweise sind der AndrĆ¼ckantrieb 108 und die AndrĆ¼ckelemente 106 auf bezogen auf die AndrĆ¼ckschwenkachsen 104 voneinander abgewandten Seiten der Zangenarme 102 angeordnet. Auf diese Weise kƶnnen voneinander abgewandte DruckkrƤfte 112 in einander zugewandte AndrĆ¼ckkrƤfte 114 umgeleitet werden.For example, the pressure drive 108 and the pressure elements 106 are arranged on sides of the forceps arms 102 which are remote from one another with respect to the pressure pivot axes 104. In this way, opposing pressure forces 112 can be diverted into mutually facing pressure forces 114.

Die Lagereinrichtungen 72 bildet also fĆ¼r jedes der zweiten Finishwerkzeuge 58 ein Schwenk-/Schublager und stellt eine Schwenk- und Linearbewegbarkeit des Finishwerkzeugs 58 relativ zu dem zweiten Werkzeughalter 46 bereit.The bearing means 72 thus forms a pivot / thrust bearing for each of the second finishing tools 58 and provides for pivotal and linear movement of the finishing tool 58 relative to the second tool holder 46.

Bei einem bevorzugten Bearbeitungsverfahren der Kurbelwelle 18 wird diese mittels des WerkstĆ¼ckantriebs 30 und des Werkzeughalters 16 in eine oszillierende Bewegung mit einem ersten, kleineren Oszillationshub 66 (vergleiche Figur 2) versetzt. Dieser Bewegung wird ein mittels des ersten Werkzeugantriebs 48 erzeugter Ɯberlagerungshub 68 des ersten Finishwerkzeugs 56 Ć¼berlagert. Der Ɯberlagerungshub 68 ist vorzugsweise grĆ¶ĆŸer als der Oszillationshub 66. Ferner ist es bevorzugt, dass die Oszillationsfrequenz des Ɯberlagerungshubs 68 kleiner ist als die Oszillationsfrequenz des Oszillationshubs 66.In a preferred machining method of the crankshaft 18, this is by means of the workpiece drive 30 and the tool holder 16 in an oscillating movement with a first, smaller Oszillationshub 66 (see FIG. 2 ). This movement is generated by means of the first tool drive 48 overlay stroke 68 of the superimposed first finishing tool 56. The superposition stroke 68 is preferably larger than the oscillation stroke 66. Further, it is preferable that the oscillation frequency of the superposition stroke 68 is smaller than the oscillation frequency of the oscillation stroke 66.

Von der Bewegung der ersten Finishwerkzeuge 56 unabhƤngig werden auch die zweiten Finishwerkzeuge 58 mittels des zweiten Werkzeugantriebs 52 in eine oszillierende Bewegung versetzt, welche in Figur 1 mit dem Bezugszeichen 70 angedeutet ist. Auf diese Weise kƶnnen die Pleuellager 36 von der Bearbeitung der Hauptlager 34 unabhƤngig in einem Arbeitsgang bzw. in derselben Aufspannung bearbeitet werden, wobei sowohl fĆ¼r die Pleuellager 36 als auch fĆ¼r die Hauptlager 34 ein Ɯberlagerungshub bereitgestellt ist.Independently of the movement of the first finishing tools 56, the second finishing tools 58 are also set in oscillating motion by means of the second tool drive 52, which in FIG FIG. 1 indicated by the reference numeral 70. In this way, the connecting rod bearings 36 can be processed by the processing of the main bearing 34 independently in one operation or in the same clamping, with a Ɯberlagerungshub is provided for both the connecting rod bearings 36 and 34 for the main bearing.

Es ist aber auch mƶglich, auf den WerkstĆ¼ckantrieb 30 zu verzichten und lediglich die WerkstĆ¼ckantriebe 48 und 52 zur Erzeugung voneinander unabhƤngiger Bewegungen der ersten Finishwerkzeuge 56 und der zweiten Finishwerkzeuge 58 zu verwenden.However, it is also possible to dispense with the workpiece drive 30 and to use only the workpiece drives 48 and 52 for generating mutually independent movements of the first finishing tools 56 and the second finishing tools 58.

DarĆ¼ber hinaus ist es auch mƶglich, den WerkstĆ¼ckantrieb 30 zur Erzeugung einer oszillierenden Bewegung der Kurbelwelle 18 zu verwenden und lediglich eine Gruppe von Finishwerkzeugen, also die ersten Finishwerkzeuge 56 oder die zweiten Finishwerkzeuge 58, mit einem Ɯberlagerungshub zu beaufschlagen. In diesem Fall ist es mƶglich, dass nur ein einziger WerkstĆ¼ckantrieb (48 oder 52) vorgesehen ist.In addition, it is also possible to use the workpiece drive 30 to generate an oscillating movement of the crankshaft 18 and to apply only a group of finishing tools, ie the first finishing tools 56 or the second finishing tools 58, with an overlay stroke. In this case, it is possible that only a single workpiece drive (48 or 52) is provided.

Claims (9)

  1. Device (10) for the finish machining of a work piece in the form of a crank shaft (18) or a cam shaft, with a work piece holder (16) and with a rotational drive (22) for rotating the work piece around its work piece axis (24), with a first finishing tool (56) for machining a main bearing (34) concentric to the work piece axis (24) and with a second finishing tool (58) for machining an additional bearing (36) offset from the work piece axis (24) in a radial direction, whereby at least one tool drive (48, 52) is provided for generating an oscillating movement of the first finishing tool (56) only, or of the second finishing tool (58) only in a direction that is parallel to the work piece axis (24), characterised in that a first tool drive (48) is provided for generating an oscillating movement of the first finishing tool (56) in a direction that is parallel to the work piece axis (24), and in that a second tool drive (52) is provided for generating an oscillating movement of the second finishing tool (58) that is independent from the movement of the first finishing tool (56) in a direction that is parallel to the work piece axis (24).
  2. Device (10) according to claim 1, characterised in that the first tool drive (48) drives a multitude of first finishing tools (56) and/or that the second tool drive (52) drives a multitude of second finishing tools (58).
  3. Device (10) according to one of the preceding claims, characterised in that first finishing tools (56) and second finishing tools (58) are arranged to alternate along the work piece axis (24).
  4. Device (10) according to one of the preceding claims, characterised in that a work piece drive (30) is envisaged for generating an oscillating movement of the work piece in a direction that is parallel to the work piece axis (24).
  5. Device (10) according to claim 4, characterised in that the work piece drive (30) is designed for generating a higher oscillation frequency and/or a smaller oscillation stroke (66) than the tool drives (48, 52).
  6. Device (10) according to one of the preceding claims, characterised in that the first tool drive (48) comprises a first tool holder (44) for holding the first finishing tool (56), and the second tool drive (52) comprises a second tool holder (46) for holding the second finishing tool (58), and in that the first tool holder (44) and the second tool holder (46) are mounted on a common frame (38).
  7. Device (10) according to claim 6, characterised in that the position of the first tool holder (44) and/or the second tool holder (46) on the frame (38) is adjustable in a vertical direction to the work piece axis (24).
  8. Device (10) according to one of the preceding claims, characterised in that the first finishing tool (56) and/or the second finishing tool (58) is a finishing line or a finishing stone.
  9. System for the finish machining of work pieces in the form of crank shafts (18) or cam shafts, comprising different crank shafts (18) or cam shafts with main bearing widths (64) and/or additional bearing widths that deviate from each other, characterised in that the same comprises a device (10) according to one of the preceding claims, and in that the datum width (62) of the first finishing tool (56) is equal to or smaller than the smallest main bearing width (64) of the different crank shafts (18) or cam shafts and/or that the datum width of the second finishing tool (58) is equal to or smaller than the smallest additional bearing width of the different crank shafts (18) or cam shafts.
EP13156079.9A 2013-02-21 2013-02-21 Device and system for finishing a workpiece in the form of a crankshaft or a camshaft Active EP2769806B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP13156079.9A EP2769806B1 (en) 2013-02-21 2013-02-21 Device and system for finishing a workpiece in the form of a crankshaft or a camshaft
US14/769,103 US9550265B2 (en) 2013-02-21 2014-01-13 Device and system for finish-machining a workpiece in the form of a crankshaft or a camshaft
PCT/EP2014/050499 WO2014127926A1 (en) 2013-02-21 2014-01-13 Device and system for finish-machining a workpiece in the form of a crankshaft or a camshaft
BR112015020081-8A BR112015020081B1 (en) 2013-02-21 2014-01-13 DEVICE FOR FINISHING THE PROCESS OF A WORKPART IN THE FORM OF A CRANKCASE OR A CAM TREE, AND, FINISHING SYSTEM FOR THE PROCESS OF WORKPARTS IN THE FORM OF A Crankshaft OR CAM TREE
CN201480018814.6A CN105121093B (en) 2013-02-21 2014-01-13 There is device and the system of the workpiece of the form of bent axle or camshaft for polish

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13156079.9A EP2769806B1 (en) 2013-02-21 2013-02-21 Device and system for finishing a workpiece in the form of a crankshaft or a camshaft

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EP2769806A1 EP2769806A1 (en) 2014-08-27
EP2769806B1 true EP2769806B1 (en) 2014-12-17

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US (1) US9550265B2 (en)
EP (1) EP2769806B1 (en)
CN (1) CN105121093B (en)
BR (1) BR112015020081B1 (en)
WO (1) WO2014127926A1 (en)

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Publication number Publication date
WO2014127926A1 (en) 2014-08-28
US9550265B2 (en) 2017-01-24
CN105121093B (en) 2016-08-31
EP2769806A1 (en) 2014-08-27
CN105121093A (en) 2015-12-02
BR112015020081B1 (en) 2021-07-20
BR112015020081A2 (en) 2017-07-18
US20160031060A1 (en) 2016-02-04

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