DE102014118134B4 - Switchable bearing device of a pivotally mounted workpiece carrier of a machine tool - Google Patents

Abstract

The invention relates to a workpiece storage device (20) having a workpiece carrier (23) pivotably mounted about a first axis (A1). The workpiece carrier (23) is permanently mounted on a first bearing (29) rotatably about the first axis (A1) via a first bearing device (28). A second bearing point (40) on the first axis (A1) for pivotal mounting of the workpiece carrier (23) can be created at a distance from the first bearing point (29) by means of a second bearing device (39). The second bearing device (39) can be activated. It has a support unit (41) and a bearing coupling unit (56). To create the second bearing (40) a coupling between the support unit (41) and the bearing coupling unit (56) on the first axis (A1) is produced. If the accessibility to a workpiece (22) arranged on the workpiece support (23) is to be improved on this side, the connection between the support unit (41) and the bearing coupling unit (56) is released and the support unit (41) and the bearing coupling unit (56) become moved away from the first axis (A1).

Description

The invention relates to a workpiece storage device for holding or clamping a workpiece in a machine tool. The workpiece storage device is used in the machine tool to position a workpiece in a work space so that it can be processed by a tool.

A workpiece storage device is for example off DE 10 2011 052 872 A1 known. The workpiece should be rotatable along a first axis. In the direction of this first axis, the workpiece is clamped from opposite sides by a respective clamping means. The clamping means are rotatable about the first axis. The workpiece is thus arranged for a tool accessible on four sides between the two clamping means.

A similar workpiece storage device is in DE 10 2004 036 371 C5 described. Again, the workpiece is clamped by two clamping means about a first axis rotatable from opposite sides. The tensioning means may be arranged on slides movable along the first axis. Furthermore, the two carriages can be arranged on a base carriage, which can be mounted movably on the machine frame transversely to the first axis.

DE 10 2011 052 012 B4 describes a workpiece storage device with a workpiece carrier for clamping a plurality of workpieces, which is fixed to a support shaft. The carrier shaft is translationally movable or rotatable in any direction. The storage of the carrier shaft is not shown. About a tie rod, the workpiece carrier during processing of the workpieces are additionally supported against a force occurring during processing force. A translational or rotary movement of the carrier shaft is no longer possible when connected to the workpiece carrier tie rods.

From DE 10 2013 102 961 B4 Known workpiece storage device has a workpiece carrier for clamping a plurality of workpieces, which is held on a support shaft. On the side opposite the carrier shaft of the workpiece carrier there is a coupling, engage the tie rods of a holding device and form a pivot bearing point to allow a limited pivoting of the holding device in the direction of the carrier shaft.

Workpiece storage devices that carry a workpiece, on the one hand to ensure an exact positioning of the workpiece, even if forces act on the workpiece, e.g. during machining by the tool or acceleration forces that occur during translational or rotational acceleration of the workpiece carrier with the workpiece. On the other hand, it is desirable to ensure accessibility to the workpiece in the working space of the machine tool from as many sides as possible, so that as versatile a machining of the workpiece is possible in the same clamping of a workpiece. It can therefore be regarded as an object of the present invention to provide a workpiece storage device which ensures both improved accessibility to the workpiece and a high positioning accuracy of the workpiece during its processing.

This object is achieved by a workpiece storage device having the features of claim 1.

The workpiece storage device has a workpiece carrier, which is mounted rotatably or pivotably about a first axis. On the workpiece carrier, a workpiece holding device is provided in order to fix or clamp a workpiece on the workpiece carrier. The workpiece is therefore rotatable or pivotable together with the workpiece carrier about the first axis. The first axis preferably extends above the workpiece holder through the space provided for locating the workpiece.

The workpiece storage device has a first bearing device on which the workpiece carrier is mounted on a first bearing permanently rotatable about the first axis. The first storage facility serves as a primary storage facility. The first bearing device is arranged on a base unit. Furthermore, a second bearing device is provided, which is set up to provide, if necessary, a second bearing point arranged along the first axis at a distance from the first bearing point. The second bearing also provides a pivot bearing for the workpiece carrier about the first axis. The first bearing point is arranged on a first bearing side of the workpiece carrier and the second bearing point can be provided on demand on one of the first bearing side opposite second bearing side of the workpiece carrier.

For this purpose, the second bearing device has a support unit arranged on the base unit. On the workpiece carrier, a bearing coupling unit is present on the second bearing side. The bearing coupling unit can be connected to the support unit and separated. When the connection is made, the workpiece carrier is additionally rotatably mounted about the first axis via the bearing coupling unit and the support unit at a second bearing point on the second bearing side. Provided that the support unit made in connection with the bearing coupling unit accessibility to the workpiece Restricts on the second bearing side, a condition can be prepared in a separate connection in which this restriction of accessibility is reduced or no longer exists, for example, by a rotational and / or translational movement of the support unit and / or the bearing coupling unit of the second bearing.

When established connection between the bearing coupling unit and the support unit, this connection can be secured or locked. For this purpose, a preferably mechanical locking device may be present, which is switchable between a locking position of a release position and in particular movable. For example, the locking device may have a movable locking pin.

Thus, according to the invention a workpiece storage device is provided which provides a permanent one-sided pivot bearing of the workpiece carrier and a switchable second bearing means for two-sided pivotal mounting about the first axis. Depending on the machining task, a more stable two-sided pivot bearing or improved accessibility to the workpiece on the second bearing side can be made possible. The fixation or clamping of the workpiece on the workpiece carrier itself remains unchanged.

The base unit may be part of a machine frame or be supported on the machine frame. The base unit may comprise one or more base parts which may be linearly and / or rotationally movable relative to one another. As a result, it is possible for the first bearing device to be arranged on a first base part and for the support unit to be arranged on a second base part of the base unit and thus for it to be linearly and / or rotationally movable relative to one another.

Preferably, the support unit between a support position and a rest position is movable. This movement can be carried out linearly and / or rotationally, for. B. by means of a carriage with Linearwälzführung or rod guide, by means of a plate on a linear guide, by means of a pivot bearing, by means of a sliding guide, etc. Furthermore, this movement can be performed manually or automatically by means of a controllable support drive means. The support drive device can be controlled electrically and / or fluidically to move the support device between the support position and the rest position.

In a preferred embodiment, the support unit comprises a movable and in particular pivotable first support arm and a movable and in particular pivotable second support arm. Each support arm may be assigned a separate support drive of the support drive device, so that the two support arms can be moved or swiveled independently of one another.

It is preferred if the two free ends of the first and the second support arm are coupled to one another in the support position, for example connected non-positively and / or positively. For example, the two free ends can each at least partially surround a cylindrical bearing journal.

For example, include the two longitudinal axes of the support arms in the support position an angle of 80 ° to 100 °. In the support position of the support device also preferably a self-locking is achieved.

The second bearing device preferably has a bearing journal. This journal may be present on the support unit or the bearing coupling unit. In the preferred embodiment of the bearing pin is part of the support unit. To produce the second bearing point of the bearing pin is aligned along the first axis, so that its longitudinal axis and the first axis coincide. In a preferred embodiment, the journal is disposed on the first support arm. The second support arm may have a connection means, for example a connection recess, which is or is adapted to produce a non-positive and / or positive connection with the bearing journal in the support position.

It is advantageous if the bearing journal has a roller bearing part. The roller bearing part is preferably formed by an axial portion of the bearing pin, which serves for producing the connection with the bearing coupling unit. Alternatively, the rotatable mounting between the bearing pin and the bearing coupling unit can also be effected by a sliding bearing. Due to the rolling bearing friction is reduced during rotation of the workpiece carrier about the first axis.

The bearing coupling unit is movable between a coupling position and a retracted position. This movement can be carried out linearly and / or rotationally, for example by means of a carriage with linear roller guide or rod guide, by means of a plate on a linear guide, by means of a pivot bearing, by means of a slide guide, etc. In the coupling position, the bearing coupling unit preferably engages the bearing journal, to support the workpiece carrier on the journal and the support unit on the base unit and thereby form the second bearing point. In the retraction position, the bearing coupling unit with Distance to the first axis arranged. This improves access to the workpiece on the second bearing side. Preferably, in the retracted position, the bearing coupling unit does not project through a plane which is aligned parallel to the first axis and limits the workpiece on the side associated with the workpiece holding device. In this embodiment, the workpiece is completely accessible from the second bearing side.

It is preferred if a coupling drive means is provided which moves the bearing coupling unit between the coupling position and the retraction position. The coupling drive device can be controlled electrically and / or fluidically.

The bearing coupling unit may have a movable and in particular pivotable first coupling arm and a movable and in particular pivotable second coupling arm. In one exemplary embodiment, the two coupling arms are mechanically coupled to one another, for example via a common coupling drive of the coupling drive device. Preferably, the two free ends of the coupling arms in the coupling position are non-positively and / or positively connected with each other and / or with the bearing pin and more preferably the rolling bearing part of the journal.

It is also advantageous if a self-locking of the bearing coupling unit is present in the coupling position.

In one embodiment, the first bearing means is provided on a first base part of the base unit and the support unit is provided on a second base part of the base unit. Preferably, the two base parts are movable relative to each other. In this embodiment, the support unit can be made immovable relative to the second base part. The second base part with the support unit can be arranged to be actively or passively movable on a machine frame or a part supported on the machine frame.

It is also advantageous if a coupling device is provided which is adapted to produce a releasable mechanical connection between the first base part and the second base part. This makes it sufficient in certain cases when either the first base part or the second base part is movable relative to the machine frame via a machine axis. The respective other base part can be moved with the connection made by the coupling device.

• 1 ein Ausführungsbeispiel einer Werkstücklagervorrichtung in einer perspektivischen Darstellung, wobei ein Werkstückträger an einer ersten Lagerstelle um eine erste Achse drehbar gelagert ist,
• 2 die Werkstücklagervorrichtung aus 1 in einer anderen perspektivischen Darstellung, wobei der Werkstückträger an der ersten und einer zweiten Lagerstelle um eine erste Achse drehbar gelagert ist,
• 3 eine perspektivische Darstellung des Werkstückträgers aus den 1 und 2 mit einer Lagerkopplungseinheit, die sich in einer Kopplungsstellung befindet,
• 4 den Werkstückträger aus 3, wobei sich die Lagerkopplungseinheit in einer Rückzugstellung befindet,
• 5 eine perspektivische, vereinfachte Darstellung eines ersten Basisteils der Werkstücklagervorrichtung aus den 1 und 2 mit einer Stützeinheit, die sich in einer Stützstellung befindet,
• 6 das Basisteil aus 5, wobei sich die Stützeinheit in einer Ruhestellung befindet,
• 7 ein Ausführungsbeispiel einer Lagerkopplungseinheit, die sich in einer Kopplungsstellung befindet, in einer Ansicht entlang der ersten Achse,
• 8 ein Ausführungsbeispiel einer Stützeinheit, die sich in einer Stützstellung befindet, in einer Ansicht entlang der ersten Achse
• 9 eine schematische, blockschaltbildähnliche Seitenansicht eines Ausführungsbeispiels einer Werkstücklagervorrichtung mit einem ersten Basisteil und einem zweiten Basisteil sowie einer Kupplungseinrichtung im gekoppelten Zustand,
• 10 die Draufsicht der Werkstücklagervorrichtung aus 9 im nicht gekoppelten Zustand,
• 11 bis 14 jeweils eine schematische, blockschaltbildähnliche Darstellung eines Ausführungsbeispiels einer Werkstücklagervorrichtung in verschiedenen Situationen zur Herstellung der Abstützung des Werkstückträgers an der zweiten Lagerstelle über eine zweite Lagereinrichtung.

Advantageous embodiments of the workpiece storage device will become apparent from the dependent claims, the description and the drawings. Hereinafter, preferred embodiments of the invention will be explained in detail with reference to the accompanying drawings. Show it:

• 1 an embodiment of a workpiece storage device in a perspective view, wherein a workpiece carrier is rotatably mounted at a first bearing point about a first axis,
• 2 the workpiece storage device 1 in another perspective view, wherein the workpiece carrier is rotatably mounted at the first and a second bearing point about a first axis,
• 3 a perspective view of the workpiece carrier from the 1 and 2 with a bearing coupling unit, which is in a coupling position,
• 4 from the workpiece carrier 3 , wherein the bearing coupling unit is in a retraction position,
• 5 a perspective, simplified representation of a first base part of the workpiece storage device of the 1 and 2 with a support unit which is in a support position,
• 6 the base part off 5 , wherein the support unit is in a rest position,
• 7 an embodiment of a bearing coupling unit, which is in a coupling position, in a view along the first axis,
• 8th an embodiment of a support unit, which is located in a support position, in a view along the first axis
• 9 2 is a schematic, block diagram similar side view of an embodiment of a workpiece storage device with a first base part and a second base part and a coupling device in the coupled state,
• 10 the top view of the workpiece storage device 9 in the uncoupled state,
• 11 to 14 in each case a schematic, block diagram-like representation of an embodiment of a workpiece storage device in various situations for producing the support of the workpiece carrier at the second bearing point via a second bearing device.

In the 1 and 2 is in each case an embodiment of a workpiece storage device 20 illustrated. The workpiece storage device 20 has a workpiece holding device 21 on, with whose help a workpiece 22 on a workpiece carrier 23 is fixed or clamped. The workpiece holding device 21 is in the 1 and 2 only highly schematically illustrated in the form of a holding plate. On the holding plate clamping means, such as clamping jaws or the like are present, which are not illustrated in detail in the drawing. Such clamping jaws can for internal clamping and / or external clamping of the workpiece 22 be used. The workpiece carrier 23 is in common with a workpiece arranged thereon 22 around a first axis A1 rotatably or pivotally mounted. The workpiece holding device 21 is at a distance from the first axis A1 arranged. An in the workpiece holding device 21 held or clamped workpiece 22 extends from the workpiece holding device 21 for example, radially to the first axis A1 and depending on its length also beyond.

The workpiece holding device 21 is on the workpiece carrier 23 arranged. In the embodiment is on the workpiece carrier 23 a rotary machine axis exists to the workpiece holding device 21 relative to the workpiece carrier 23 around a second axis A2 to be able to turn. The second axis A2 is rectangular in the embodiment and in particular radially to the first axis A1 aligned.

The workpiece holding device 21 is rotatable on a carrier plate 24 of the workpiece carrier 23 arranged. The carrier plate 24 extends substantially perpendicular to the second axis A2 , On one side, as the first bearing side 25 is designated, is on the support plate 24 a storage part 26 of the workpiece carrier 23 arranged. The bearing part 26 can be integral with no seam and joint with the support plate 24 be connected. The bearing part 26 extends from the carrier plate 24 on the side of the workpiece holding device 21 over and, for example, parallel to the second axis A2 , The bearing part 26 is about the first axis A1 rotatable on a rotary machine axis 27 stored. The rotary machine axis 27 For example, provides a first storage facility 28 dar. The workpiece carrier 23 is thus at one of the first storage facility 28 provided first depository 29 rotatable about the first axis A1 stored. The first depository 29 is located on the first bearing side 25 , At the first depository 29 is the workpiece carrier 23 permanently with the first storage facility 28 and according to the rotary machine axis, for example 27 connected.

The rotary machine axis 27 is based on a base unit of a machine tool. The base unit includes a first base part 33 , In the embodiment illustrated here, the first base part 33 as a machine slide 34 executed, which is mounted relative to the machine frame of a machine tool linearly displaceable and / or rotatable or pivotable. Alternatively, the first base part could 33 also be firmly connected to a machine frame or with a foundation.

At one in the direction of the first axis A1 considered, the first bearing side 25 opposite second bearing side 38 of the workpiece carrier 23 , can have a second storage facility 39 a second depository 40 for supporting the workpiece carrier 23 to be provided. The second storage facility 39 has a support unit for this purpose 41 auf, which is located on the base unit of the machine tool and in the embodiment according to the 1 to 8th on the first base part 33 or the machine slide 34 supported. The support unit 41 is in this embodiment between a support position I ( 2 and 5 ) and a rest position II ( 1 and 6 ) movable. The movement between the support position I and the rest position II can be done manually or automatically.

In the embodiment described here, the support unit 41 a movable and example according pivotable first support arm 42 and a movable and pivotable example according to the second support arm 43 on. The two support arms 42 . 43 are each with one end to a respective associated pivot bearing part 44 pivoted. The two pivot bearing parts 44 are in the embodiment of the first base part 33 arranged. They are in a transverse direction Q perpendicular to the first axis A1 oriented, spaced apart. The length of each of the two pivot arms 42 . 43 is greater than half the distance between the two pivot bearing parts 44 in the transverse direction Q ,

The direction parallel to the first axis A1 and perpendicular to the transverse direction Q is called a longitudinal direction L designated.

At its the pivot bearing part 44 opposite free end 42a has the first support arm 42 a journal 45 on. The longitudinal axis of the journal 45 is in every position of the first support arm 42 longitudinal L aligned. The second support arm 43 indicates at its the pivot bearing part 44 opposite free end 43a an arm recess 46 on.

The arm recess 46 penetrates the arm in the longitudinal direction L Completely. Radial to the longitudinal direction L is the arm recess 46 at one point through a recess opening 47 opened, the dimension of which is perpendicular to the longitudinal direction L at least the diameter of the journal 45 equivalent. This can be the free end 43a of second support arm 43 over the journal 45 be pivoted so that the journal 45 through the recess opening 47 in the arm recess 46 penetrates and the arm recess 46 in the direction of the first axis A1 completely interspersed. In other words, it encompasses the free end 43a the second support arm 43 the journal 45 ,

The arm recess 46 has an inner section 46a on, whose dimension to the diameter of the journal 45 adapted so that the journal 45 in the support position I the support unit 41 at least three places on the second support arm 43 as free of play as possible. For example, in the inner section 46a a circular-arc-shaped abutment edge or abutment surface exists whose diameter corresponds to the diameter of the journal. Following the inner section 46a can the arm recess 46 an outer section 46b whose dimension is perpendicular to the longitudinal direction L considered to the opening recess 47 increases. This will encompass the trunnion 45 by a pivoting movement of the second support arm 43 simplified.

In the support position I is the first support arm 42 starting from the respective pivot bearing part 44 radial to the first axis A1 aligned so that the longitudinal axis of the journal 45 with the first axis A1 coincides. The second support arm 43 surrounds the journal 45 with his free end 43a , The journal 45 penetrates the inner section 46a the recess 46 and so lies on the second support arm 43 on that the first support arm 42 with the journal 45 is prevented from pivoting about its pivot axis.

As in 8th illustrated, can be used to move the two support arms 42 . 43 from the rest position II in the support position I and vice versa, an electrically and / or fluidically controllable support drive means 51 be present so that the movement can be automated. At the in 8th schematically illustrated embodiment, the support drive means 51 two fluidic and exemplary hydraulic support drives 52 in the form of fluid cylinders. Each support arm 42 . 43 is a support drive 52 associated, which can perform the respective pivoting movement. Thus, the two support arms 42 . 43 separately pivotable.

In the support position I is preferably a self-locking of the support unit 41 causes. This will increase the load on the backup drive unit 51 while supporting the on the support unit 41 reduced acting forces. The self-locking is, for example, by the coupled together support arms 42 . 43 reached. The support arms 42 . 43 For example, forces can be supported along their respective longitudinal axis and only have a degree of freedom of movement in the pivoting direction. The forces at the second depository 39 on the journal 45 in this degree of freedom of movement on the first support arm 42 act, are in the support position I through the second support arm 43 recorded and supported.

In the embodiment, the longitudinal axes of the two support arms close 42 . 43 in the support position I an angle in the range of 80 ° to 100 °.

At rest II are the support arms 42 . 43 arranged so that their longitudinal axes with the transverse direction Q or at an acute angle, preferably in the range of 0 ° to 20 ° ( 1 and 6 ). The journal 45 and the support arms 42 . 43 are at rest II with distance to the first axis A1 arranged.

To the second storage facility 39 belongs in addition to the support unit 41 a bearing coupling unit 56 , The bearing coupling unit 56 is in the 1 to 4 and 7 to recognize. The bearing coupling unit 56 is on the workpiece carrier 23 on the second bearing side 38 arranged. She can with the prop unit 41 over the bearing pin 45 connected or from the support unit 41 be separated to the second depository 40 for supporting the tool carrier 23 optionally provide or dissolve.

The bearing coupling unit 56 is between a coupling position III and a retirement position IV movable. In the coupling position III is the bearing coupling unit 56 in a position in which a non-positive and / or positive connection with the journal 45 is made ( 2 . 3 and 7 ). In the retreat position IV is the bearing coupling unit 56 with distance to the first axis A1 arranged ( 1 and 4 ).

The bearing coupling unit 56 has a movable and exemplary pivotable first coupling arm 57 and a movable and according to the example pivotable second coupling arm 58 , The two coupling arms 57 . 58 are each pivotable with one end on the tool carrier 23 and according to the carrier plate 24 stored. Starting from the respective pivot bearing point, the two coupling arms extend 57 . 58 towards their respective free end 57a and 58a, respectively. Each coupling arm 57 . 58 has at its free end 57a and 58a an arm recess 46 , The arm recess 46 is analogous to the arm recess 46 the second support arm 43 designed, so that reference may be made to the above description.

The two coupling arms 57 . 58 and the second support arm 43 are configured identically according to example. The first support arm 42 In its outer contour corresponds essentially to the other arms 43 . 57 . 58 in which he uses instead of the arm recess 46 at its free end 42a the journal 45 wearing.

In the retreat position IV extend the longitudinal axes of the two coupling arms 57 . 58 substantially parallel to each other in the transverse direction Q ( 1 and 4 ). In the coupling position III are the longitudinal axes of the two coupling arms 57 . 58 at a second angle β to each other and each radial to the first axis A1 aligned. The second angle β lies in the exemplary embodiment in the range of 80 ° to 100 ° ( 7 ).

Looking along the first axis A1 or in the axial direction of the journal 45 limit the armholes 46 the two coupling arms 57 . 58 the journal 45 in the coupling position III in the circumferential direction about the first axis A1 Completely. The two openings 47 are each perpendicular to the longitudinal axis of the respective coupling arm 57 . 58 aligned so that between the two recess openings 47 in the circumferential direction about the first axis A1 there is no overlap when the coupling arms 57 . 58 in the support position III are located. As with the support arms 42 . 43 exists also in the support position III located coupling arms 57 . 58 a self-locking.

To move the coupling arms 57 . 58 from the withdrawal position IV in the support position III and vice versa, at least in one embodiment, an electrically and / or fluidly controllable coupling drive means 59 available. According to the example, only one coupling drive is provided 60 to move both coupling arms 57 . 58 available. The coupling drive 60 is designed as a fluidic and exemplary hydraulic cylinder. The output of the coupling drive 60 - For example, the piston rod - is a coupling gear 61 mechanically with the two coupling arms 57 . 58 motion-coupled. The two coupling arms are thus simultaneously moved or pivoted coordinated.

As in 7 is schematically illustrated, the bearing pin 45 in one embodiment, a rolling bearing part 45a exhibit. The rolling bearing part 45a is through the axial portion of the journal 45 formed in the coupling position III the bearing coupling unit 56 through the coupling arms 57 . 58 is encompassed. For a rotation of the workpiece carrier 23 around the first axis A1 is through the rolling bearing part 45a provided a rolling bearing. This can reduce the friction. It is alternatively possible, a sliding bearing between the journals 45 and the two coupling arms 57 . 58 provided. Next could alternatively also a plain bearing part instead of the rolling bearing part 45a through the journal 45 self-provided.

• Zunächst sei angenommen, dass der Werkstückträger 23 lediglich an der ersten Lagerstelle 29 drehbar gelagert ist und sich die Stützeinheit 41 in der Ruhestellung II und die Lagerkopplungseinheit 56 in der Rückzugstellung IV befindet (1). Das Werkstück 22 ist in dieser Position der Werkstücklagervorrichtung 22 von der zweiten Lagerseite 38 her vollständig zugänglich. Sowohl die Stützarme 42, 43 als auch die Kopplungsarme 57, 58 sind mit Abstand zur ersten Achse A1 angeordnet und ragen beispielsgemäß nicht in das durch das Werkstück 22 definierte Lichtraumprofil entlang bzw. parallel zur ersten Achse A1 hinein.

The workpiece storage device 20 according to the 1 to 8th works as follows:

• First, assume that the workpiece carrier 23 only at the first depository 29 is rotatably mounted and the support unit 41 at rest II and the bearing coupling unit 56 in the retreat position IV located ( 1 ). The workpiece 22 is in this position of the workpiece storage device 22 from the second bearing side 38 completely accessible. Both the support arms 42 . 43 as well as the coupling arms 57 . 58 are at a distance from the first axis A1 arranged and protrude, for example, not in the through the workpiece 22 defined clearance space along or parallel to the first axis A1 into it.

If during processing the lateral access from the second bearing side 38 to the workpiece 22 is not required, and rather an improved storage or support of the workpiece carrier 23 should be done with the help of the second storage facility 39 a second depository 40 on the journal 45 provided. For this purpose, first the first support arm 42 pivoted into a position in which the longitudinal axis of the journal 45 along the first axis A1 is aligned. Subsequently, the second support arm 43 with his free end 43a to the first axis A1 pivoted out, leaving the journal 45 through the recess opening 47 in the arm recess 46 to the inner section 46a penetrates. In this position of the support arms 42 . 43 is the support position I reached. According to the example, the recess opening 47 in the support position I approximately in the direction of the longitudinal axis of the first support arm 42 ,

Subsequently or simultaneously to the pivoting movement of the second support arm 43 become the two coupling arms 57 . 58 with their respective free ends 57a, 58a to the first axis A1 panned out. As in connection with the first support arm 43 explained, embrace the two coupling arms 57 . 58 with their respective arm recess 46 the journal 45 and according to the rolling bearing part 45a of the journal 45 , This is a connection between the bearing coupling unit 56 and the support unit 41 created and a second depository 40 provided. The bearing coupling unit 56 is in the coupling position III ( 2 ).

In a rotary or pivoting movement about the first axis A1 the bearing coupling unit moves 56 together with the tool carrier 23 around the first axis A1 What is schematic in 2 is illustrated.

The removal of the second depository 40 takes place in accordance with the reverse order.

In the 11 to 14 is highly schematic of a modified embodiment of the workpiece storage device 20 illustrated. The support unit 41 with the journal 45 is relative to the first base part 33 in the transverse direction Q on a second base part 64 arranged. The journal 45 is located relative to the second base part 64 in a fixed predetermined position, for example, at the height of the first axis A1 , The bearing coupling unit 56 is executed analogously to the embodiment described above and has the two movable or pivotable coupling arms 57 . 58 on.

The second base part 64 can via a drive, such as an electric and / or fluidic drive 65 in the transverse direction Q relative to the first base part 33 and thus relative to the first storage facility 28 or to the rotary machine axis 27 to be moved. In the embodiment serves as a fluidic drive 65 a fluid cylinder, for example a hydraulic cylinder. The second base part 64 or the first base part 33 can be used to provide the second depository 40 so along the transverse direction Q be positioned that the journal 45 along the first axis A1 is aligned ( 12 ). Following this, the two coupling arms 56 . 57 as in connection with the embodiment according to the 1 to 8th described, in the coupling position III to create the second depository 40 to be panned ( 13 ). When pivoting about the first axis A1 is the workpiece carrier 23 then additionally at the second depository 40 supported ( 14 ).

The dissolution of the second depository 40 can be done in reverse order.

Because the support unit 41 in the transverse direction Q from the workpiece carrier 23 can be removed is moving or pivoting the support unit 41 between a support position and a rest position not required. The accessibility to the workpiece 22 is guaranteed if the second base part 64 with sufficient distance from the workpiece carrier 23 is arranged ( 11 ).

Another modified embodiment of the workpiece storage device 20 is schematic in the 9 and 10 illustrated. As in the embodiment according to the 1 to 8th is the first base part 33 through a machine slide 34 formed in the transverse direction Q along a carriage guide 66 is movable relative to the machine frame. The bearing coupling unit 56 corresponds to the embodiments described above. The support unit 41 is as in the embodiment according to the 11 to 14 on a separate, second base part 64 present, however, in contrast to the embodiment according to the 11 to 14 does not have its own drive. The second base part 64 is in the transverse direction Q via a guide device 67 guided displaced stored. The machine slide 34 can via a suitable carriage drive 68 for example one from a motor 69 driven spindle 70 in the transverse direction Q to be moved.

To the second depository 40 to provide 9 ), the machine can slide 34 in the transverse direction Q opposite the second base part 64 be positioned. Subsequently, a movement coupling between the machine carriage 34 and the second base part 64 produced. This can for example be done by the bearing coupling unit 56 in their coupling position III is brought. Additionally or alternatively, it is also possible, a coupling device 71 provide to make this motion coupling. The coupling device 71 has means for positive and / or non-positive connection of the machine carriage 34 or the first base part 33 with the second base part 64 on. For example, at the first base part 33 at least one sliding coupling pin 72 be present, in a respective associated coupling recess 73 on the second base part 64 engages for the preparation of the coupling connection and for the separation from the coupling recess 73 is moved out. When manufactured coupling connection can by the carriage drive 68 the second base part 64 together with the first base part 33 or the machine slide 34 in the transverse direction Q to be moved.

To dissolve the second depository 40 becomes the second base part 64 moved to the desired parking position and the motion clutch between the second base part 64 and the first base part 33 solved. Subsequently, the first base part 33 or the machine slide 34 in the transverse direction Q from the second base part 64 be moved away.

The invention relates to a switchable storage facility 39 one pivotable about a first axis A1 stored workpiece carrier 23 a machine tool. The workpiece carrier 23 is permanently over a first storage facility 28 at a first depository 29 rotatable about the first axis A1 stored. At a distance from the first storage location 29 can with the help of a second storage facility 39 a second depository 40 at the first axis A1 for rotary mounting of the workpiece carrier 23 be created. The second storage facility 39 is switchable. It has a support unit 41 and a bearing coupling unit 56 on. To create the second depository 40 becomes a coupling between the support unit 41 and the bearing coupling unit 56 at the first axis A1 produced. On this page, the accessibility to one on the workpiece carrier 23 arranged workpiece 22 be improved, the connection between the support unit 41 and the bearing coupling unit 56 solved and the support unit 41 as well as the bearing coupling unit 56 be from the first axis A1 moved away.

LIST OF REFERENCE NUMBERS

20

Work supporting mechanism

21

Workpiece holder

22

workpiece

23

Workpiece carrier

24

support plate

25

first bearing side

26

bearing part

27

Rotary machine axis

28

first storage facility

29

first depository

33

first base part

34

machine slide

38

second bearing side

39

second storage facility

40

second depository

41

support unit

42

first support arm

42a

free end of the first support arm

43

second support arm

43a

free end of the second support arm

44

Pivot bearing part

45

pivot

45a

roller bearing part

46

Armaussparung

46a

inner section of the arm recess

46b

outer portion of the arm recess

47

recess opening

51

Support driving device

52

support upload

56

Bearing coupling unit

57

first coupling arm

58

second coupling arm

59

Coupling driving device

60

coupling drive

61

coupling gear

64

second base part

65

drive

66

carriage guide

67

guide means

68

carriage drive

69

engine

70

spindle

71

coupling device

72

kingpin

73

coupling recess

I

supporting position

II

rest position

III

coupling position

IV

retracted position

α

first angle

β

second angle

A1

first axis

A2

second axis

L

longitudinal direction

Q

transversely

Claims (17)

Workpiece storage device (20), comprising a workpiece carrier (23) having a workpiece holding device (21), which is mounted such that it can rotate or pivot about a first axis (A1), with a first bearing device (28) arranged on a base unit (33) Workpiece carrier (23) is mounted permanently rotatably about the first axis (A1) at a first bearing point (29), with a second bearing device (39) which is adapted to a second bearing point arranged at a distance from the first bearing point (29) (40) for the workpiece carrier (23), wherein the second bearing device (39) has a support unit (41) arranged on the base unit (33) and a bearing coupling unit (56) connectable and separable with the support unit (41) Workpiece carrier (23) is arranged, wherein when manufactured connection between the support unit (41) and the bearing coupling unit (56) has a pivot bearing between the bearing coupling unit (56) and the support unit (41) is provided at the second bearing location (40) about the first axis (A1) wherein the bearing coupling unit (56) between a coupling position (III) and a retracted position (IV) is movable, wherein the bearing coupling unit (56) in the retracted position (IV) is arranged at a distance from the first axis (A1). Workpiece storage device after Claim 1 , characterized in that the support unit (41) between a support position (I) and a rest position (II) is movable. Workpiece storage device after Claim 2 , characterized in that a support drive means (51) is provided which is adapted to move the support unit (41) between the support position (I) and the rest position (II). Workpiece storage device according to one of the preceding claims, characterized in that the support unit (41) has a movable first support arm (42) and a movable second support arm (43). Workpiece storage device after Claim 2 or 3 and after Claim 4 , characterized in that the free end (42a) of the first support arm (42) and the free end (43a) of the second support arm (43) in the support position (I) are coupled together. Workpiece storage device according to one of the preceding claims, characterized in that the support unit (41) or the bearing coupling unit (56) has a bearing pin (45), the longitudinal axis of which produced connection between the bearing coupling unit (56) and the support unit (41) along the first axis (A1) is aligned. Workpiece storage device after Claim 4 or 5 and after Claim 6 , characterized in that the bearing pin (45) on the first support arm (42) is arranged and the second support arm (43) has a connecting means which is adapted, in a support position (I) a frictional and / or positive connection with the To produce bearing pin (45). Workpiece storage device after Claim 6 or 7 , characterized in that the bearing journal (45) has a rolling bearing part (45a). Workpiece storage device according to one of the preceding claims, characterized in that a coupling drive means (59) is provided, which is adapted to move the bearing coupling unit (56) between the coupling position (III) and the retracted position (VI). Workpiece storage device according to one of Claims 6 to 8th , characterized in that the bearing coupling unit (56) in the coupling position (III) with the bearing pin (45) or the rolling bearing part (45a) of the bearing journal (45) is rotatably coupled. Workpiece storage device according to one of the preceding claims, characterized in that the bearing coupling unit (56) has a movable first coupling arm (57) and a movable second coupling arm (58). Workpiece storage device after Claim 10 and 11 , characterized in that the two free ends (57a, 58a) of the coupling arms (57, 58) in the coupling position (III) positively and / or positively coupled to the bearing pin (45) or the rolling bearing part (45a). Workpiece storage device according to one of the preceding claims, characterized in that the first bearing device (28) on a first base part (33) of the base unit is arranged. Workpiece storage device after Claim 13 , characterized in that the support unit (41) is arranged on the first base part (33) or on a second base part (64). Workpiece storage device after Claim 14 , characterized in that the first base part (33) and the second base part (64) are arranged to be movable relative to one another and / or relative to a machine frame or machine foundation. Workpiece storage device after Claim 14 or 15 , characterized in that the support unit (41) is designed without its own drive and is arranged immovable relative to the second base part (64). Workpiece storage device after Claim 15 or 16 characterized in that the workpiece storage device (10) is adapted to carry out the following steps: - establishing the connection between the support unit (41) and the bearing coupling unit (56); - Moving the first base part via an associated drive, whereby the second base part (64) is moved along with the first base part (33) because of the compound produced; - moving the second base part (64) back into a parking position; Disconnecting the support unit (41) and the bearing coupling unit (56); - Moving away the first base part (33) of the second base part (64).

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