WO2001047663A1 - Method and device for grinding joint spiders - Google Patents

Method and device for grinding joint spiders Download PDF

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Publication number
WO2001047663A1
WO2001047663A1 PCT/EP2000/013018 EP0013018W WO0147663A1 WO 2001047663 A1 WO2001047663 A1 WO 2001047663A1 EP 0013018 W EP0013018 W EP 0013018W WO 0147663 A1 WO0147663 A1 WO 0147663A1
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WO
WIPO (PCT)
Prior art keywords
grinding
articulated
grinding wheel
pins
around
Prior art date
Application number
PCT/EP2000/013018
Other languages
German (de)
French (fr)
Inventor
Erwin Junker
Original Assignee
Erwin Junker Maschinenfabrik Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Erwin Junker Maschinenfabrik Gmbh filed Critical Erwin Junker Maschinenfabrik Gmbh
Priority to AU23671/01A priority Critical patent/AU2367101A/en
Publication of WO2001047663A1 publication Critical patent/WO2001047663A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q39/00—Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation
    • B23Q39/02—Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation the sub-assemblies being capable of being brought to act at a single operating station
    • B23Q39/021—Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation the sub-assemblies being capable of being brought to act at a single operating station with a plurality of toolheads per workholder, whereby the toolhead is a main spindle, a multispindle, a revolver or the like
    • B23Q39/025—Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation the sub-assemblies being capable of being brought to act at a single operating station with a plurality of toolheads per workholder, whereby the toolhead is a main spindle, a multispindle, a revolver or the like with different working directions of toolheads on same workholder
    • B23Q39/026—Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation the sub-assemblies being capable of being brought to act at a single operating station with a plurality of toolheads per workholder, whereby the toolhead is a main spindle, a multispindle, a revolver or the like with different working directions of toolheads on same workholder simultaneous working of toolheads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/25—Movable or adjustable work or tool supports
    • B23Q1/44—Movable or adjustable work or tool supports using particular mechanisms
    • B23Q1/50—Movable or adjustable work or tool supports using particular mechanisms with rotating pairs only, the rotating pairs being the first two elements of the mechanism
    • B23Q1/54—Movable or adjustable work or tool supports using particular mechanisms with rotating pairs only, the rotating pairs being the first two elements of the mechanism two rotating pairs only
    • B23Q1/5468—Movable or adjustable work or tool supports using particular mechanisms with rotating pairs only, the rotating pairs being the first two elements of the mechanism two rotating pairs only a single rotating pair followed parallelly by a single rotating pair
    • B23Q1/5481—Movable or adjustable work or tool supports using particular mechanisms with rotating pairs only, the rotating pairs being the first two elements of the mechanism two rotating pairs only a single rotating pair followed parallelly by a single rotating pair followed parallelly by a single rotating pair
    • 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
    • B24B19/02—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding grooves, e.g. on shafts, in casings, in tubes, homokinetic joint elements
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
    • F16D3/20—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
    • F16D3/202—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members one coupling part having radially projecting pins, e.g. tripod joints
    • F16D3/205—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members one coupling part having radially projecting pins, e.g. tripod joints the pins extending radially outwardly from the coupling part
    • F16D3/2055—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members one coupling part having radially projecting pins, e.g. tripod joints the pins extending radially outwardly from the coupling part having three pins, i.e. true tripod joints
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2250/00—Manufacturing; Assembly
    • F16D2250/003—Chip removing

Definitions

  • the invention relates to a method and a device, in particular for grinding joint stars
  • DE 41 03 091 C2 describes a device for grinding, in particular, cams of a camshaft, a grinding unit being assigned to each cam or pair of cams.
  • the grinding units are staggered and arranged in a star shape over the length of the camshaft, and all are processed simultaneously Cams possible without the grinding units interfering with one another
  • the camshaft is rotated about its longitudinal axis within the receptacle carrying it, and the rotating grinding disks are program-controlled to move mutually dependent paths away from and on the longitudinal axis so as to move the cams - Grinding the outer contour of the individual cams into the raw contour of the cams of the camshaft.
  • a disadvantage of this method is the fact that grinding can only take place perpendicular to the longitudinal axis of the camshaft
  • articulated stars with more than two articulated pins such as tripods, cannot be ground with the described device in a single work step or cycle, since the longitudinal axes of the articulated pins each form an angle of 120 ° to one another
  • joint stars are therefore received and centered in a chuck in a central bore perpendicular to the plane of the longitudinal axes running through the joint pins and centered.
  • the grinding tool is used for grinding brought into engagement with the articulated star and rotated about the longitudinal axis of the articulated pin to be ground.
  • the workpiece is turned further to the next hinge pin to be ground, ie in the present case by 120 °.
  • the further turning or clocking can take place by a mechanism integrated in the chuck or by a separate device.
  • articulated stars with an even number of articulated pins it is possible to machine at least two opposite articulated pins at the same time, since they lie on the same longitudinal axis.
  • a device then clocks the articulated star by the corresponding angle in order to grind another pair of opposing articulated pins.
  • the partial accuracy is generally impaired by the contacting of the joint stars. This is e.g. the case when the central axis of symmetry of the articulated star along the central bore does not exactly match the axis of rotation when being contacted.
  • the conventional technique is time-consuming, since the individual pivot pins or pairs of pivot pins can only be ground one behind the other.
  • articulated pins with non-circular or elliptical cross sections are also required in industry.
  • the out-of-roundness of these pivot pins i.e. the ratio of a diameter Dl to the second diameter D2 of the ellipse must lie in the hundredths of a millimeter range for these pivot pins.
  • a radial movement of the grinding wheels perpendicular to the longitudinal axis of the pivot pins is necessary, similar to the manufacture of camshafts with the device described above, i.e. an infeed movement.
  • the movement of the grinding wheels must be coordinated with the rotation of the pivot pins in the conventional methods.
  • the object of the present invention is to provide a method and a device for grinding joint stars, with which or with one more efficient (reduced production time) and more precise machining of joint stars is possible, whereby the disadvantages existing in the prior art are overcome.
  • the processing time for a single joint star can advantageously be significantly reduced by the method according to the invention for grinding joint stars in particular with at least two joint pins, in which at least two joint pins are simultaneously ground in the same clamping of the joint star with grinding wheels guided around the joint pins. This reduces the unit costs of joint stars.
  • the method is equally suitable for articulated stems with an even and an odd number of articulated pins for simultaneous grinding of all articulated pins.
  • the method according to the invention can thus be applied to different joint systems with the same efficiency, regardless of the number of joint pins.
  • An advantageous embodiment provides for the grinding of articulated stars with three articulated pins or of tripods, in which the angle included between two longitudinal axes of articulated pins is 120 °.
  • the invention is provided to grind hinge pins out of round or round.
  • This application speed is important because industry is increasingly demanding non-circular, e.g. elliptical cross-sectional profiles for special applications.
  • the method according to the invention can be used equally for non-round as well as round pivot pins, since any movement of the grinding tools required for grinding these cross-sectional profiles can be achieved according to one embodiment by combining a circular and a linear movement, or according to another embodiment by combining two circular movements ,
  • the cross-sectional profiles mentioned are also possible by combining two linear movements, in particular mutually perpendicular.
  • This variant is technically advantageous since the same device can be used to implement the linear movements.
  • the inventive device for performing the method is designed so that at least two headstocks are provided, each with at least one grinding wheel, which can simultaneously be brought into engagement with the pivot pins to be ground, the grinding wheels being mounted in the headstocks so that they are grinded around the pivot pins are movable.
  • the workpiece is clamped centrally between the headstocks carrying the grinding wheels, which makes it possible to deliver all the necessary headstocks to the articulated pins to be ground.
  • a centrally symmetrical arrangement of the grinding sticks around the workpiece has proven to be particularly advantageous in this regard.
  • the movement of the grinding wheels around the pivot pins is achieved during grinding with a housing which can be rotated in a spindle stock, in which a grinding spindle unit is mounted eccentrically and can be moved radially to the axis of rotation of the housing.
  • the movement of the grinding wheels around the pivot pins is realized when grinding with an internal headstock, in which a second housing is rotatably eccentrically mounted in a first rotatable housing, in which the grinding spindle unit is eccentrically mounted.
  • the grinding disks are moved by a cross slide arranged in the headstock.
  • Fig. 1 shows a plan view of a machine for grinding articulated stems with three articulated pins (tripods);
  • Fig. 2 is a front view of a grinding headstock along section V-V of Fig. 1;
  • FIG. 2A shows a further embodiment of a grinding headstock along the
  • Section V-V of Figure 1; 3 shows a special embodiment of the clamping of a tripode;
  • Figure 4 shows a schematic view of the movement of a grinding wheel around a pivot pin;
  • Fig. 5 illustrates a tripod pin with an elliptical cross-sectional profile.
  • a machine stand 1 is used to hold three headstocks 3.
  • the three headstocks 3 are arranged for optimum delivery to a workpiece 7, for example an articulated star, in such a way that the longitudinal axis of a grinding dome 5 of a headstock 3 each in the direction (ZI; Z2; Z3) the longitudinal axis of a hinge pin 11 of the hinge star 7 is displaceable.
  • the articulated star 7, here in the form of a tripode has an angle of 120 ° between the longitudinal axes of its articulated pins 11.
  • the tripode 7 is centrally symmetrical between the Grinding discs 6 bearing headstocks 3 clamped.
  • a joint pin 11 is ground by means of a rotating grinding wheel 6, which is received on the grinding dome 5 of a grinding spindle unit 4.
  • the grinding dome 5 is eccentrically mounted on a housing 3A rotatably mounted in the headstock 3.
  • the grinding dome 5 and thus the grinding wheel 6 can be moved radially to the axis of rotation of the housing 3A over a distance XI 1 by means of a mechanism provided in the housing 3A. This makes it possible to compensate for grinding wheel wear and for the grinding wheel 6 to be fed to the pivot pin 1 1 to be ground. Due to the eccentric arrangement, the grinding wheel 6 executes a circular movement when the housing 3A is rotated by a motor and is thus movable about a pivot pin 11 during grinding.
  • FIG. 2A A further embodiment for a possible mounting of the grinding dome 5 in the headstock 3 is described in FIG. 2A.
  • a second housing 3B is rotatably eccentrically mounted in the housing 3A eccentrically to its axis of rotation in the headstock 3, in which in turn the grinding dome 5 is mounted eccentrically.
  • grinding wheel wear compensation and an infeed of grinding wheel 6 to the pivot pin 1 1 to be ground are possible.
  • grinding is a suitable coordination of the rotations of the two housings 3A, 3B moving the grinding wheel 6 when grinding around Hinge pin 1 1 possible and non-round as well as nde profile cross sections can be ground.
  • All axes of the device can be implemented as CNC axes for precise machining of the tripode 7. All movements of both the headstocks 3 and the grinding domes 5, such as the rotational movements of the housings 3A, 3B, the rotational speeds of the grinding wheels 6 and the grinding duration can also be controlled by a microprocessor.
  • FIG. 3 An embodiment of the clamping of the tripode 7 is shown in FIG. 3.
  • a base 12 which is fixedly connected to the machine stand 1 is provided with a dome 15, in which a centering dome 14 is received.
  • the tripod 7 is centered with respect to the vertical axis of the dome 15 by means of the centering dome 14 and fixed by a pressure cylinder 13 arranged from above.
  • the tripode 7 is thereby clamped on its flat surfaces 8 and 9, through which a central bore 10 is made.
  • centering dome 14 it is possible to design the centering dome 14 as a clamping dome, by means of which the tripode 7 can be clamped directly and as a result of which the use of a pressure cylinder 13 is no longer necessary.
  • Figure 4 shows schematically the movement of the grinding wheel 6 around the hinge pin 11.
  • Figure 5 illustrates a non-circular hinge pin 11, which has an elliptical shape, ie two different diameters D1 and D2. Usually one of the diameters in the hundredths of a millimeter range is smaller than the other diameter.
  • Certain embodiments of pivot pins 11 can also have recesses or radii which can be ground directly with corresponding grinding wheels 6.
  • the present invention can also be used to grind flat sides at the end of the pivot pin 11 or on the end face.
  • the articulation pins 11 are preferably ground with Ko nd or CBN grinding wheels. Dressable, ceramic-bonded grinding wheels can be used as CBN grinding wheels, or electroplated CBN grinding wheels that cannot be dressed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)

Abstract

The invention relates to a method and device for grinding, in particular, joint spiders (7) comprising at least two joint pins (11). According to the invention, at least two joint pins (11) are ground at the same time in the same chucking of the joint spider (7) using grinding wheels (6) that are guided around the joint pins (11).

Description

Verfahren und Vorrichtung zum Schleifen von Gelenksternen Method and device for grinding articulated stars
Die Erfindung betrifft ein Verfahren und eine Vorrichtung insbesondere zum Schleifen von GelenksternenThe invention relates to a method and a device, in particular for grinding joint stars
In der DE 41 03 091 C2 wird eine Vorrichtung zum Schleifen insbesondere von Nocken einer Nockenwelle beschrieben, wobei jedem Nocken bzw jedem Nokkenpaar eine Schleifeinheit zugeordnet ist Dazu sind die Schleifeinheiten über die Lange der Nockenwelle gestaffelt und sternförmig angeordnet, und es wird eine gleichzeitige Bearbeitung sämtlicher Nocken möglich, ohne daß die Schleifeinheiten sich gegenseitig stören Zum Schleifen wird die Nockenwelle innerhalb der sie tragenden Aufnahme um ihre Langsachse gedreht, und die rotierenden Schleifscheiben werden programmgesteuert um voneinander abhangige Wege von der Langsachse weg und auf diese zu bew egt, um so die Nocken- Außenkontur der einzelnen Nocken in die Rohkontur der Nocken der Nockenwelle emzuschleifen Nachteilig bei diesem Verfahren ist die Tatsache, daß das Schleifen nur senkrecht zur Langsachse der Nockenwelle erfolgen kannDE 41 03 091 C2 describes a device for grinding, in particular, cams of a camshaft, a grinding unit being assigned to each cam or pair of cams. For this purpose, the grinding units are staggered and arranged in a star shape over the length of the camshaft, and all are processed simultaneously Cams possible without the grinding units interfering with one another For grinding, the camshaft is rotated about its longitudinal axis within the receptacle carrying it, and the rotating grinding disks are program-controlled to move mutually dependent paths away from and on the longitudinal axis so as to move the cams - Grinding the outer contour of the individual cams into the raw contour of the cams of the camshaft. A disadvantage of this method is the fact that grinding can only take place perpendicular to the longitudinal axis of the camshaft
Insbesondere Gelenksterne mit mehr als zwei Gelenkzapfen, wie beispielsweise Tripoden, können mit der beschriebenen Vorrichtung nicht m einem einzigen Arbeitsschritt bzw Takt geschliffen werden, da die Langsachsen der Gelenkzapfen jeweils einen Winkel von 120° zueinander bildenIn particular, articulated stars with more than two articulated pins, such as tripods, cannot be ground with the described device in a single work step or cycle, since the longitudinal axes of the articulated pins each form an angle of 120 ° to one another
Üblicherweise werden Gelenksterne daher in einer zentπschen Bohrung senkrecht zur Ebene der durch die Gelenkzapfen verlaufenden Langsachsen in einem Spannfutter aufgenommen und zentriert Zum Schleifen wird das Schleif erkzeug mit dem Gelenkstern in Eingriff gebracht und der Gelenkstern um die Längsachse des zu schleifenden Gelenkzapfens gedreht. Nach dem Schleifen eines Gelenkzapfens, wird das Werkstück zum nächsten zu schleifenden Gelenkzapfen weitergedreht, d.h. im vorliegenden Fall um 120°. Das Weiterdrehen bzw. Weitertakten kann durch einen im Spannfutter integrierten Mechanismus erfolgen oder durch eine separate Vorrichtung. Bei Gelenksternen mit einer geraden Anzahl von Gelenkzapfen ist es möglich, zumindest zwei gegenüberliegende Gelenkzapfen gleichzeitig zu bearbeiten, da sie auf derselben Längsachse liegen. Eine Vorrichtung vertaktet den Gelenkstern dann um den entsprechenden Winkel, um ein weiteres Paar gegenüberliegender Gelenkzapfen zu schleifen.Usually, joint stars are therefore received and centered in a chuck in a central bore perpendicular to the plane of the longitudinal axes running through the joint pins and centered. The grinding tool is used for grinding brought into engagement with the articulated star and rotated about the longitudinal axis of the articulated pin to be ground. After grinding a hinge pin, the workpiece is turned further to the next hinge pin to be ground, ie in the present case by 120 °. The further turning or clocking can take place by a mechanism integrated in the chuck or by a separate device. In the case of articulated stars with an even number of articulated pins, it is possible to machine at least two opposite articulated pins at the same time, since they lie on the same longitudinal axis. A device then clocks the articulated star by the corresponding angle in order to grind another pair of opposing articulated pins.
Durch das Vertakten der Gelenksterne wird jedoch im allgemeinen die Teilgenauigkeit verschlechtert. Dies ist z.B. der Fall, wenn die zentrale Symmetrieachse des Gelenksterns längs der zentrischen Bohrung nicht exakt mit der Drehachse beim Vertakten übereinstimmt. Darüber hinaus ist die herkömmliche Technik zeitaufwendig, da die einzelnen Gelenkzapfen bzw. Gelenkzapfenpaare nur hintereinander geschliffen werden können.However, the partial accuracy is generally impaired by the contacting of the joint stars. This is e.g. the case when the central axis of symmetry of the articulated star along the central bore does not exactly match the axis of rotation when being contacted. In addition, the conventional technique is time-consuming, since the individual pivot pins or pairs of pivot pins can only be ground one behind the other.
Neben herkömmlichen Rinden Gelenkzapfenquerschnitten werden in der Industrie auch Gelenkzapfen mit unrunden bzw. ellipsenförmigen Querschnitten benötigt. Die Unrundheit dieser Gelenkzapfen, d.h. das Verhältnis eines Durchmessers Dl zum zweiten Durchmesser D2 der Ellipse, muß bei diesen Gelenkzapfen im Hundertstel-Millimeter-Bereich liegen. Um diese Konturen schleifen zu können, ist ähnlich wie beim Herstellen von Nockenwellen mit der vorher beschriebenen Vorrichtung eine radiale Bewegung der Schleifscheiben senkrecht zur Längsachse der Gelenkzapfen notwendig, d.h. eine Zustellbewegung. Wie beim Nockenschleifen muß dazu bei den herkömmlichen Verfahren die Bewegung der Schleifscheiben mit der Drehung der Gelenkzapfen koordiniert sein.In addition to conventional bark articulated cross sections, articulated pins with non-circular or elliptical cross sections are also required in industry. The out-of-roundness of these pivot pins, i.e. the ratio of a diameter Dl to the second diameter D2 of the ellipse must lie in the hundredths of a millimeter range for these pivot pins. In order to be able to grind these contours, a radial movement of the grinding wheels perpendicular to the longitudinal axis of the pivot pins is necessary, similar to the manufacture of camshafts with the device described above, i.e. an infeed movement. As with cam grinding, the movement of the grinding wheels must be coordinated with the rotation of the pivot pins in the conventional methods.
Die Aufgabe der vorliegenden Erfindung ist es, ein Verfahren und eine Vorrichtung zum Schleifen von Gelenksternen zu schaffen, mit dem bzw. mit der eine effizientere (produktionszeit-reduzierte) und maßgenauere Bearbeitung von Gelenksternen möglich ist, wobei die im Stand der Technik vorhandenen Nachteile überwunden werden.The object of the present invention is to provide a method and a device for grinding joint stars, with which or with one more efficient (reduced production time) and more precise machining of joint stars is possible, whereby the disadvantages existing in the prior art are overcome.
Gelöst wird diese Aufgabe erfindungsgemäß durch ein Verfahren zum Schleifen von Gelenksternen gemäß Anspruch 1 sowie durch eine Vorrichtung gemäß Anspruch 8. Vorteilhafte Ausgestaltungen der Erfindung werden durch die in den Unteransprüchen angegebenen Merkmale ermöglicht.This object is achieved according to the invention by a method for grinding joint stars according to claim 1 and by a device according to claim 8. Advantageous embodiments of the invention are made possible by the features specified in the subclaims.
Durch das erfindungsgemäße Verfahren zum Schleifen insbesondere von Gelenksternen mit zumindest zwei Gelenkzapfen, bei welchem zumindest zwei Gelenkzapfen zugleich in derselben Aufspannung des Gelenksterns mit um die Gelenkzapfen geführten Schleifscheiben geschliffen werden, kann vorteilhaft die Bearbeitungszeit für einen einzelnen Gelenkstem deutlich verringert werden. Dadurch wird eine Reduktion der Stückkosten von Gelenksternen erreicht.The processing time for a single joint star can advantageously be significantly reduced by the method according to the invention for grinding joint stars in particular with at least two joint pins, in which at least two joint pins are simultaneously ground in the same clamping of the joint star with grinding wheels guided around the joint pins. This reduces the unit costs of joint stars.
Vorteilhafter Weise kann auf ein Vertakten des Werkstücks verzichtet werden, so daß die Teilgenauigkeit verbessert wird.Advantageously, there is no need to contact the workpiece, so that the partial accuracy is improved.
Das Verfahren ist gleichermaßen für Gelenksteme mit einer geraden wie einer ungeraden Anzahl von Gelenkzapfen zum gleichzeitigen Schleifen aller Gelenkzapfen geeignet. Das erfindungsgemäße Verfahren ist somit mit gleicher Effizienz auf unterschiedliche Gelenksteme, unabhängig von der Anzahl der Gelenkzapfen anwendbar.The method is equally suitable for articulated stems with an even and an odd number of articulated pins for simultaneous grinding of all articulated pins. The method according to the invention can thus be applied to different joint systems with the same efficiency, regardless of the number of joint pins.
Eine vorteilhafte Ausführungsform sieht das Schleifen von Gelenksternen mit drei Gelenkzapfen bzw. von Tripoden vor, bei welchen der jeweils zwischen zwei Längsachsen von Gelenkzapfen eingeschlossene Winkel 120° beträgt.An advantageous embodiment provides for the grinding of articulated stars with three articulated pins or of tripods, in which the angle included between two longitudinal axes of articulated pins is 120 °.
Gemäß einer weiteren vorteilhaften Ausführungsform der Erfindung ist es vorgesehen, Gelenkzapfen unrund oder rund zu schleifen. Diese Anwendungsmöglich- keit ist von Bedeutung, da von der Industrie in zunehmendem Maße unrunde, z.B. elliptische Querschnittsprofile für spezielle Anwendungen verlangt werden. Das erfindungsgemäße Verfahren ist gleichermaßen für unrunde wie auch runde Gelenkzapfen anwendbar, da jede zum Schleifen dieser Querschnittpro file notwendi- ge Bewegung der Schleifwerkzeuge gemäß einer Ausfühmngsform durch Kombination einer Zirkular- und einer Linearbewegung erreicht werden kann, oder gemäß einer anderen Ausfühmngsform durch Kombination zweier Zirkularbewegungen.According to a further advantageous embodiment of the invention, it is provided to grind hinge pins out of round or round. This application speed is important because industry is increasingly demanding non-circular, e.g. elliptical cross-sectional profiles for special applications. The method according to the invention can be used equally for non-round as well as round pivot pins, since any movement of the grinding tools required for grinding these cross-sectional profiles can be achieved according to one embodiment by combining a circular and a linear movement, or according to another embodiment by combining two circular movements ,
Gemäß einer weiteren vorteilhaften Ausfühmngsform sind die genannten Querschnittsprofile auch durch Kombination zweier insbesondere zueinander senkrechter Linearbewegungen möglich. Diese Variante ist technisch vorteilhaft, da zur Realisierung der Linearbewegungen jeweils dieselbe Vorrichtung verwendet werden kann.According to a further advantageous embodiment, the cross-sectional profiles mentioned are also possible by combining two linear movements, in particular mutually perpendicular. This variant is technically advantageous since the same device can be used to implement the linear movements.
Die erfindungsgemäße Vorrichtung zur Durchführung des Verfahrens ist so gestaltet, daß zumindest zwei Spindelstöcke mit zumindest je einer Schleifscheibe vorgesehen sind, welche zugleich mit den zu schleifenden Gelenkzapfen in Eingriff bringbar sind, wobei die Schleifscheiben in den Spindelstöcken so gelagert sind, daß sie beim Schleifen um die Gelenkzapfen bewegbar sind.The inventive device for performing the method is designed so that at least two headstocks are provided, each with at least one grinding wheel, which can simultaneously be brought into engagement with the pivot pins to be ground, the grinding wheels being mounted in the headstocks so that they are grinded around the pivot pins are movable.
In einer bevorzugten Ausgestaltung ist das Werkstück zentral zwischen den die Schleifscheiben tragenden Spindelstöcken aufgespannt, wodurch es möglich wird, alle erforderlichen Spindelstöcke an die zu schleifenden Gelenkzapfen zuzustel- len. Besonders vorteilhaft erweist sich diesbezüglich eine zentralsymmetrische Anordnung der Schleifstöcke um das Werkstück.In a preferred embodiment, the workpiece is clamped centrally between the headstocks carrying the grinding wheels, which makes it possible to deliver all the necessary headstocks to the articulated pins to be ground. A centrally symmetrical arrangement of the grinding sticks around the workpiece has proven to be particularly advantageous in this regard.
Gemäß einer weiteren bevorzugten Ausfühmngsform wird die Bewegung der Schleifscheiben um die Gelenkzapfen beim Schleifen mit einem in einem Spin- delstock drehbaren Gehäuse erreicht, in dem eine Schleifspindeleinheit exzentrisch gelagert und zur Drehachse des Gehäuses radial bewegbar ist. Bei einer weiteren Ausftihrungsform wird die Bewegung der Schleifscheiben um die Gelenkzapfen beim Schleifen mit inem Spindelstock realisiert, beim dem in einem ersten drehbaren Gehäuse drehbar exzentrisch ein zweites Gehäuse gelagert ist, in welchem wiedemm die Schleifspindeleinheit exzentrisch gelagert ist. Das Bewe- gen der Schleifscheiben wird bei einer weiteren vorteilhaften Ausfühmngsform durch einen im Spindelstock angeordneten Kreuzschlitten erzielt.According to a further preferred embodiment, the movement of the grinding wheels around the pivot pins is achieved during grinding with a housing which can be rotated in a spindle stock, in which a grinding spindle unit is mounted eccentrically and can be moved radially to the axis of rotation of the housing. At a Another embodiment, the movement of the grinding wheels around the pivot pins is realized when grinding with an internal headstock, in which a second housing is rotatably eccentrically mounted in a first rotatable housing, in which the grinding spindle unit is eccentrically mounted. In a further advantageous embodiment, the grinding disks are moved by a cross slide arranged in the headstock.
Weitere Vorteile, Merkmale und Anwendungsmöglichkeiten der vorliegenden Erfindung ergeben sich aus der nachfolgenden Beschreibung mit Bezug auf die Zeichnung, in welcher:Further advantages, features and possible uses of the present invention result from the following description with reference to the drawing, in which:
Fig. 1 eine Draufsicht auf eine Maschine zum Schleifen von Gelenkstemen mit drei Gelenkzapfen (Tripoden) darstellt; Fig. 2 eine Vorderansicht eines Schleifspindelstockes entlang des Schnittes V-V aus Fig. 1 ist;1 shows a plan view of a machine for grinding articulated stems with three articulated pins (tripods); Fig. 2 is a front view of a grinding headstock along section V-V of Fig. 1;
Fig. 2A eine weitere Ausfühmngsform eines Schleifspindelstockes entlang des2A shows a further embodiment of a grinding headstock along the
Schnittes V-V aus Fig. 1 ist; Fig. 3 eine spezielle Ausfühmngsform der Aufspannung einer Tripode zeigt; Fig. 4 eine schematische Ansicht der Bewegung einer Schleifscheibe um einen Gelenkzapfen zeigt; undSection V-V of Figure 1; 3 shows a special embodiment of the clamping of a tripode; Figure 4 shows a schematic view of the movement of a grinding wheel around a pivot pin; and
Fig. 5 einen Tripodenzapfen mit einem elliptischen Querschnittprofil veranschaulicht.Fig. 5 illustrates a tripod pin with an elliptical cross-sectional profile.
In den Fig. 1 bis 5 ist eine Ausfühmngsform der Erfindung gezeigt. Ein Maschi- nenständer 1 dient zur Aufnahme von drei Spindelstöcken 3. Die drei Spindelstöcke 3 sind für eine optimale Zustellung zu einem Werkstück 7, z.B. einem Gelenkstern so angeordnet, daß die Längsachse eines Schleifdoms 5 eines Spindelstockes 3 jeweils in Richtung (ZI ; Z2; Z3) der Längsachse eines Gelenkzapfens 11 des Gelenksterns 7 verschiebbar ist. Der Gelenkstern 7, hier in Form einer Tripode, weist zwischen den Längsachsen seiner Gelenkzapfen 1 1 jeweils einen Winkel von 120° auf. Die Tripode 7 ist zentralsymmetrisch zwischen den Schleifscheiben 6 tragenden Spindelstöcken 3 aufgespannt. Zum Schleifen von Gelenksternen 7 mit einer größeren oder kleineren Anzahl von Gelenkzapfen 11 ist es möglich die Spindelstöcke 3 auf dem Maschinenständer 1 geeignet zu versetzen und so anzuordnen, daß alle Schleifscheiben 6 zugleich mit allen Gelenk - zapfen 1 1 in Eingriff stehen.1 to 5, an embodiment of the invention is shown. A machine stand 1 is used to hold three headstocks 3. The three headstocks 3 are arranged for optimum delivery to a workpiece 7, for example an articulated star, in such a way that the longitudinal axis of a grinding dome 5 of a headstock 3 each in the direction (ZI; Z2; Z3) the longitudinal axis of a hinge pin 11 of the hinge star 7 is displaceable. The articulated star 7, here in the form of a tripode, has an angle of 120 ° between the longitudinal axes of its articulated pins 11. The tripode 7 is centrally symmetrical between the Grinding discs 6 bearing headstocks 3 clamped. For grinding articulated stars 7 with a larger or smaller number of articulated pins 11, it is possible to suitably move the headstocks 3 on the machine stand 1 and to arrange them in such a way that all of the grinding wheels 6 simultaneously engage with all of the articulated pins 1 1.
Wie in Fig. 2 gezeigt folgt das Schleifen eines Gelenkzapfen 1 1 mittels einer rotierenden Schleifscheibe 6, die auf dem Schleifdom 5 einer Schleifspindeleinheit 4 aufgenommen ist. Der Schleifdom 5 ist an einem im Spindelstock 3 drehbar gelagerten Gehäuse 3A exzentrisch montiert. Darüber hinaus kann der Schleifdom 5 und somit die Schleifscheibe 6 mittels einer im Gehäuse 3A vorgesehenen Mechanik radial zur Drehachse des Gehäuses 3A über eine Strecke XI 1 bewegt werden. Dadurch ist eine Schleifscheiben-Verschleißkompensation sowie ein Zustellen der Schleifscheibe 6 zu dem zu schleifenden Gelenkzapfen 1 1 möglich. Durch die exzentrische Anordnung führt die Schleifscheibe 6 bei Drehung des Gehäuses 3A durch einen Motor eine Kreisbewegung aus und ist beim Schleifen somit um einen Gelenkzapfen 1 1 bewegbar. Durch Kombination der Drehbewegung des Gehäuses 3A mit der Linearbewegung des Schleifdoms 5 längs der Strecke XI 1 während des Schleifens können darüber hinaus eine unrunde, bei- spielsweise elliptische Bewegung der Schleifscheibe 6 um einen Gelenkzapfen 1 1 , aber auch andere komplizierte Bewegungen erreicht werden.As shown in FIG. 2, a joint pin 11 is ground by means of a rotating grinding wheel 6, which is received on the grinding dome 5 of a grinding spindle unit 4. The grinding dome 5 is eccentrically mounted on a housing 3A rotatably mounted in the headstock 3. In addition, the grinding dome 5 and thus the grinding wheel 6 can be moved radially to the axis of rotation of the housing 3A over a distance XI 1 by means of a mechanism provided in the housing 3A. This makes it possible to compensate for grinding wheel wear and for the grinding wheel 6 to be fed to the pivot pin 1 1 to be ground. Due to the eccentric arrangement, the grinding wheel 6 executes a circular movement when the housing 3A is rotated by a motor and is thus movable about a pivot pin 11 during grinding. By combining the rotary movement of the housing 3A with the linear movement of the grinding dome 5 along the distance XI 1 during grinding, a non-circular, for example elliptical movement of the grinding wheel 6 around a pivot pin 11, but also other complicated movements can be achieved.
Eine weitere Ausführungsform für eine mögliche Lagerung des Schleifdoms 5 im Spindelstock 3 ist in Fig. 2A beschrieben. Hier ist im Gehäuse 3A exzentrisch zu dessen Drehachse im Spindelstock 3 drehbar exzentrisch ein zweites Gehäuse 3B gelagert, in welchem wiederum der Schleifdom 5 exzentrisch gelagert ist. Auch bei dieser Ausfühmngsform ist eine Schleifscheiben-Verschleißkompensation sowie ein Zustellen der Schleifscheibe 6 zu dem zu schleifenden Gelenkzapfen 1 1 möglich. Beim Schleifen ist durch geeignete Koordination der Drehungen der beiden Gehäuse 3A, 3B ein Bewegen der Schleifscheibe 6 beim Schleifen um den Gelenkzapfen 1 1 möglich und es können unrunde wie auch nde Profilquer- schnitte geschliffen werden.A further embodiment for a possible mounting of the grinding dome 5 in the headstock 3 is described in FIG. 2A. Here, a second housing 3B is rotatably eccentrically mounted in the housing 3A eccentrically to its axis of rotation in the headstock 3, in which in turn the grinding dome 5 is mounted eccentrically. In this embodiment, too, grinding wheel wear compensation and an infeed of grinding wheel 6 to the pivot pin 1 1 to be ground are possible. When grinding is a suitable coordination of the rotations of the two housings 3A, 3B moving the grinding wheel 6 when grinding around Hinge pin 1 1 possible and non-round as well as nde profile cross sections can be ground.
Für ein präzises Bearbeiten der Tripode 7 sind sämtliche Achsen der Vorrichtung als CNC-Achsen ausführbar. Sämtliche Bewegungen sowohl der Spindelstöcke 3 als auch der Schleifdome 5, w ie die Drehbewegungen der Gehäuse 3A, 3B die Drehgeschwindigkeiten der Schleifscheiben 6 und die Schleifdauer können darüber hinaus Mikroprozessor-gesteuert werden.All axes of the device can be implemented as CNC axes for precise machining of the tripode 7. All movements of both the headstocks 3 and the grinding domes 5, such as the rotational movements of the housings 3A, 3B, the rotational speeds of the grinding wheels 6 and the grinding duration can also be controlled by a microprocessor.
In Fig. 3 ist eine Ausfühmngsform der Aufspannung der Tripode 7 gezeigt. Bei der vorliegenden Ausführungsform ist ein mit dem Maschinenständer 1 fest verbundener Sockel 12 mit einem Dom 15 versehen, in welchem ein Zentrierdom 14 aufgenommen ist. Mittels des Zentrierdoms 14 wird die Tripode 7 in Bezug auf die vertikale Achse des Doms 15 zentriert und durch einen von oben angeordne- ten Dmckzylinder 13 fixiert. Die Tripode 7 wird dadurch an ihren Planflächen 8 und 9, durch welche eine zentrale Bohrung 10 ausgeführt ist, eingespannt.An embodiment of the clamping of the tripode 7 is shown in FIG. 3. In the present embodiment, a base 12 which is fixedly connected to the machine stand 1 is provided with a dome 15, in which a centering dome 14 is received. The tripod 7 is centered with respect to the vertical axis of the dome 15 by means of the centering dome 14 and fixed by a pressure cylinder 13 arranged from above. The tripode 7 is thereby clamped on its flat surfaces 8 and 9, through which a central bore 10 is made.
Bei einer weiteren Ausfuhrungsform ist es möglich, den Zentrierdom 14 als Spanndom auszuführen, mittels welchem die Tripode 7 direkt eingespannt werden kann und wodurch das Verwenden ein Druckzylinders 13 nicht mehr nötig ist.In a further embodiment, it is possible to design the centering dome 14 as a clamping dome, by means of which the tripode 7 can be clamped directly and as a result of which the use of a pressure cylinder 13 is no longer necessary.
Figur 4 zeigt schematisch die Bewegung der Schleifscheibe 6 um den Gelenkzapfen 11. Figur 5 veranschaulicht einen unrunden Gelenkzapfen 1 1 , der eine elliptische Form, d.h. zwei unterschiedliche Durchmesser Dl und D2 aufweist. Übli- cherweise ist einer der Durchmesser im hundertstel Millimeter-Bereich kleiner als der andere Durchmesser. Bestimmte Ausführungsformen von Gelenkzapfen 1 1 können auch Einstiche oder Radien aufweisen, die direkt mit entsprechenden Schleifscheiben 6 eingeschliffen werden können. Darüber hinaus kann mit der vorliegenden Erfindung auch das Schleifen von Planseiten am Ende des Gelenk- zapfens 11 oder an der Stirnseite durchgeführt werden. Vorzugsweise erfolgt das Schleifen der Gelenkzapfen 11 mit Ko nd- oder CBN- Schleifscheiben. Als CBN-Schleifscheiben können abrichtbare, keramisch gebundene Schleifscheiben verwendet werden, oder galvanisch belegte CBN- Schleifscheiben, die nicht abrichtbar sind. Figure 4 shows schematically the movement of the grinding wheel 6 around the hinge pin 11. Figure 5 illustrates a non-circular hinge pin 11, which has an elliptical shape, ie two different diameters D1 and D2. Usually one of the diameters in the hundredths of a millimeter range is smaller than the other diameter. Certain embodiments of pivot pins 11 can also have recesses or radii which can be ground directly with corresponding grinding wheels 6. In addition, the present invention can also be used to grind flat sides at the end of the pivot pin 11 or on the end face. The articulation pins 11 are preferably ground with Ko nd or CBN grinding wheels. Dressable, ceramic-bonded grinding wheels can be used as CBN grinding wheels, or electroplated CBN grinding wheels that cannot be dressed.
BezugszeichenlisteLIST OF REFERENCE NUMBERS
1 Maschinenständer1 machine stand
2 Zustellschlitten2 delivery slides
3 Spindelstock3 headstock
3A, 3B Gehäuse3A, 3B housing
4 Schleifspindeleinheit4 grinding spindle unit
5 Schleifdom5 grinding dome
6 Schleifscheibe6 grinding wheel
7 Wτerkstück, Gelenkstem, Tripode7 W τ orkpiece, Gelenkstem, Tripode
8, 9 Planflächen8, 9 flat surfaces
10 Bohrung10 hole
11 Gelenkzapfen11 pivot pins
12 Sockel12 bases
13 Dmckzylinder13 pressure cylinders
14 Zentrierdom14 centering dome
15 Dom 15 dom

Claims

Patentansprücheclaims
Verfahren zum Schleifen insbesondere von Gelenksternen (7) mit zumindest zwei Gelenkzapfen (11), bei welchem zumindest zwei Gelenkzapfen (11) zugleich in derselben Aufspannung des GelenksternsMethod for grinding in particular articulated stars (7) with at least two articulated pins (11), in which at least two articulated pins (11) simultaneously in the same clamping of the articulated star
(7) mit um die Gelenkzapfen (1 1) geführten Schleifscheiben (6) geschliffen werden(7) with the grinding wheels (6) guided around the pivot pins (1 1)
Verfahren nach Anspruch 1 , bei welchem beim Schleifen von Gelenkstemen (7) mit drei Gelenkzapfen (1 1) alle drei Gelenkzapfen (1 1 ) zugleich in derselben Aufspannung des Gelenksterns (7) geschliffen werdenMethod according to Claim 1, in which, when grinding articulated stems (7) with three articulated pins (1 1), all three articulated pins (1 1) are simultaneously ground in the same setting of the articulated star (7)
Verfahren nach Anspruch 1 oder 2, bei welchem zumindest ein Gelenkzapfen (1 1 ) unrund geschliffen wirdMethod according to Claim 1 or 2, in which at least one hinge pin (11) is ground out of round
Verfahren nach einem der Anspmche 1 bis 3, bei welchem zumindest ein Gelenkzapfen (1 1) mnd geschliffen wirdMethod according to one of Claims 1 to 3, in which at least one hinge pin (11) is ground
Verfahren nach einem der Anspmche 1 bis 4, bei welchem jedeMethod according to one of claims 1 to 4, in which each
Schleifscheibe (6) beim Schleifen an jeweils einem Gelenkzapfen (1 1 ) auf einer durch Kombination einer Zirkular- und einer Linearbe egung beschriebenen Bahn um den Gelenkzapfen (1 1 ) bew egt w irdGrinding wheel (6) when grinding on a pivot pin (1 1) is moved on a path described by a combination of circular and linear motion around the pivot pin (1 1)
Verfahren nach einem der Anspmche 1 bis 4, bei welchem jedeMethod according to one of claims 1 to 4, in which each
Schleifscheibe (6) beim Schleifen an jeweils einem Gelenkzapfen (1 1) auf einer Bahn um den Gelenkzapfen (11) bewegt wird, die durch Überlagerung zweier Zirkularbewegungen beschrieben ist, wobei das Bahnzentrum einer Zirkularbewegung außerhalb der Längsachse des zu schleifenden Gelenkzapfens (11) liegt und das Bahnzentrum der anderen Zirkularbewegung mit der Längsachse des Gelenkzapfens (1 1) in wesentlichen übereinstimmt.Grinding wheel (6) is moved on a path around the hinge pin (11) when grinding on a hinge pin (1 1), which by Superposition of two circular movements is described, wherein the path center of a circular movement lies outside the longitudinal axis of the joint pin (11) to be ground and the path center of the other circular movement essentially coincides with the longitudinal axis of the joint pin (11).
7. Verfahren nach einem der Ansprüche 1 bis 4, bei welchem jede Schleifscheibe (6) beim Schleifen an jeweils einem Gelenkzapfen (1 1 ) auf einer durch Kombination zweier Linearbewegungen beschriebenen Bahn um den Gelenkzapfen (1 1) bewegt wird.7. The method according to any one of claims 1 to 4, wherein each grinding wheel (6) is moved during grinding on a respective pivot pin (1 1) on a path described by a combination of two linear movements around the pivot pin (1 1).
8. Vorrichtung zum Schleifen insbesondere von Gelenksternen (7) mit mindestens zwei Gelenkzapfen (1 1 ) gemäß dem Verfahren nach einem der Ansprüche 1 bis 7, bei welcher zumindest zwei Spindelstöcke (3) mit zumindest je einer Schleifscheibe (6) vorgesehen sind, welche zugleich mit den zu schleifenden Gelenkzapfen (1 1 ) in Eingriff bringbar sind, wobei die Schleifscheiben (6) im Spindelstock (3) so gelagert sind, daß sie beim Schleifen um die Gelenkzapfen (1 1 ) bewegbar sind.8. Device for grinding in particular articulated stars (7) with at least two articulated pins (1 1) according to the method according to one of claims 1 to 7, in which at least two headstocks (3) with at least one grinding wheel (6) are provided, which can also be brought into engagement with the pivot pins (1 1) to be ground, the grinding wheels (6) being mounted in the headstock (3) in such a way that they can be moved around the pivot pins (1 1) during grinding.
9. Vorrichtung nach Anspruch 8, bei welcher der Gelenkstem (7) zentral zwischen den die Schleifscheiben (6) tragenden Spindelstöcken aufgespannt ist.9. The device according to claim 8, wherein the articulated star (7) is clamped centrally between the headstocks carrying the grinding wheels (6).
10. Vorrichtung nach Anspruch 8 oder 9, bei welcher die Spindelstöcke (3) zentralsymmetrisch um den Gelenkstem (7) angeordnet sind.10. The device according to claim 8 or 9, wherein the headstocks (3) are arranged centrally symmetrically around the articulated stem (7).
1 1. Vorrichtung nach einem der Ansprüche 8 bis 10, bei welcher die Anzahl der Spindelstöcke (3) gleich der Anzahl der zu schleifenden Gelenkzapfen ( 1 1 ) des Gelenkstems (7) ist. 1 1. Device according to one of claims 8 to 10, wherein the number of headstocks (3) is equal to the number of articulated pins (1 1) to be ground of the articulated arm (7).
12. Vorrichtung nach einem der Ansprüche 8 bis 11, bei welcher drei Spindelstöcke (3) zum Schleifen von Gelenksternen (7) mit drei Gelenkzapfen (11) vorgesehen sind.12. Device according to one of claims 8 to 11, in which three headstocks (3) for grinding articulated stars (7) are provided with three pivot pins (11).
13. Vorrichtung nach einem der Ansprüche 8 bis 12, bei welcher zumindest ein Spindelstock (3) mit einem drehbaren Gehäuse (3A) vorgesehen ist, in dem eine die Schleifscheibe (6) tragende Schleifspindeleinheit (4) exzentrisch gelagert ist, die radial zur Drehachse des Gehäuses (3A) bewegbar ist, wobei die Schleifscheibe (6) beim Schleifen um den Gelenkzapfen (11) bewegbar ist.13. Device according to one of claims 8 to 12, wherein at least one headstock (3) with a rotatable housing (3A) is provided, in which a grinding wheel (6) carrying grinding spindle unit (4) is eccentrically mounted, the radial to the axis of rotation of the housing (3A) can be moved, the grinding wheel (6) being movable around the pivot pin (11) during grinding.
14. Vorrichtung nach einem der Ansprüche 8 bis 12, bei welcher zumindest ein Spindelstock (3) mit einem ersten drehbaren Gehäuse (3A) vorgesehen ist, in dem drehbar exzentrisch ein zweites Gehäuse (3B) gelagert ist, in welchem eine die Schleifscheibe (6) tragende Schleifspindeleinheit (4) exzentrisch gelagert ist, wobei die Schleifscheibe (6) in Richtung zur Mittelachse des ersten drehbaren Gehäuses (3A) bewegbar ist und beim Schleifen um den Gelenkzapfen (1 1) bewegbar ist.14. Device according to one of claims 8 to 12, wherein at least one headstock (3) with a first rotatable housing (3A) is provided, in which a second housing (3B) is rotatably eccentrically mounted, in which a grinding wheel (6 ) carrying grinding spindle unit (4) is mounted eccentrically, the grinding wheel (6) being movable in the direction of the central axis of the first rotatable housing (3A) and being movable around the pivot pin (11) during grinding.
15. Vorrichtung nach einem der Ansprüche 8 bis 12, bei welcher zumindest ein Spindelstock (3) mit einem Kreuzschlitten vorgesehen ist, auf dem eine die Schleifscheibe tragende Schleifspindeleinheit (4) angeordnet ist, wobei die Schleifscheibe (6) beim Schleifen um den Gelenkzapfen (1 1) bewegbar ist.15. Device according to one of claims 8 to 12, wherein at least one headstock (3) is provided with a cross slide, on which a grinding spindle unit (4) carrying the grinding wheel is arranged, the grinding wheel (6) during grinding around the pivot pin ( 1 1) is movable.
16. Vorrichtung nach einem der Ansprüche 8 bis 15, bei w elcher zumindest eine Schleifscheibe (6) eine Korundschleifscheibe ist.16. The device according to one of claims 8 to 15, in which at least one grinding wheel (6) is a corundum grinding wheel.
17. Vorrichtung nach einem der Ansprüche 8 bis 16, bei welcher zumindest eine Schleifscheibe (6) eine keramisch gebundene CBN-Schleifscheibe ist. 17. Device according to one of claims 8 to 16, wherein at least one grinding wheel (6) is a ceramic-bonded CBN grinding wheel.
8. Vorrichtung nach einem der Ansprüche 8 bis 17, bei welcher zumindest eine Schleifscheibe (6) eine galvanisch belegte CBN-Schleifscheibe ist. 8. Device according to one of claims 8 to 17, wherein at least one grinding wheel (6) is a galvanically coated CBN grinding wheel.
PCT/EP2000/013018 1999-12-23 2000-12-20 Method and device for grinding joint spiders WO2001047663A1 (en)

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EP0666132A1 (en) * 1993-05-27 1995-08-09 Tai-Her Yang Means for positioning an element, whereby a rotatable element is mounted excentrically on a rotable base plate

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009078053A2 (en) * 2007-12-17 2009-06-25 Caretta Technology S.R.L. Automated station for cutting and processing material in general
WO2009078053A3 (en) * 2007-12-17 2009-11-05 Caretta Technology S.R.L. Automated station for cutting and processing material in general
WO2010088181A2 (en) 2009-01-28 2010-08-05 Cincinnati Machine, Llc Machining center for a wind turbine hub
EP2382390A2 (en) * 2009-01-28 2011-11-02 Mag Ias, Llc Machining center for a wind turbine hub
EP2382390A4 (en) * 2009-01-28 2013-04-24 Mag Ias Llc Machining center for a wind turbine hub
DE102015202705A1 (en) * 2015-02-13 2016-08-18 Volkswagen Aktiengesellschaft Method for producing a pin of a tripod ester

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AU2367101A (en) 2001-07-09

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