DD217165A1 - TERMINAL DEVICE FOR INTERCHANGEABLE AND PARTICULAR STEERING WORKSTICKERS - Google Patents

Abstract

Clamping device for interchangeable and sub-steps ausfuehrende Werkstuecktraeger, especially for machining centers, with a Werkstuecktraeger for redistributing or changing lifting and lowering again lifting device concentrically associated with a clamping ring for axial clamping of Werkstuecktraeger and undertable, by turning about its axis in and is disengaged. The aim is to shorten the changeover times when changing workpiece carriers, as well as to reduce the control and circuit complexity. The object is to provide a clamping device, arranged in the lower table technical means to realize the rotational movement of the clamping ring and run time parallel to the lifting movement of the lifting device. According erfindungsgemaess between the rotary part for the partial movement and the clamping ring a zwangslaeufige operative connection through which in dependence on the lifting movement of the clamping ring is engageable and disengaged.

Description

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Title d e r Fiction invention

Clamping device for interchangeable and part steps exporting workpiece carrier

Field of application of the invention

The invention relates to a clamping device for replaceable and part steps exporting workpiece carrier, in particular for machining centers, with a lifting device which raises the workpiece carrier for redistributing or to change and again lowers and concentrically a clamping ring is assigned to the axial clamping of workpiece carrier and lower table, the; is brought into and out of rotation about its axis by twisting.

Characteristic of the known technical solu conditions

In DE-OS 2631971 a device is described in which the workpiece carrier is clamped by a lifting device associated and axially fixed on its and temporarily rotatably arranged clamping ring on the lower table of a machining center.

When changing the workpiece carrier is moved by the lifting device along the axis of the lower table upwards. The workpiece carrier is in its raised end position, the rotation of the clamping ring takes place in its engagement * ·; or release position via a separate drive, is realized by displaceable with respect to the undertable arms of the change device, which attack the clamping ring and rotate it accordingly. Furthermore, the DD-WP 148318 has a

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direction known / in which also the workpiece carrier is clamped by a lifting device concentrically associated clamping ring on the lower table of a machining center. The lifting device raises the workpiece carrier for redistribution, twists and lowers it again »The torsional movements of the clamping ring about its axis, which bring him into and out of engagement with this device via the feed drive; realized for the partial movement. · Ί

When workpiece carrier change of the workpiece carrier is moved by the lifting device along the axis of the lower table upward loading j until its clamping is canceled on the sub-table · arrival occurs ^v closing over the feed drive the rotation of the clamping ring, which brings it out of engagement. The common disadvantage of these devices is that the lifting movement performed by the lifting device and the twisting movement of the clamping ring, which brings it into or out of operation, take place one behind the other and thus significantly prolong the times of change. '

In addition, the control and circuit complexity for the rotation of the clamping ring is relatively high.

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The object of the invention is to provide a clamping device for exchangeable and part-steps exporting workpiece carrier, which makes it possible to shorten the changeover times when changing the workpiece carrier as well as to reduce the control and circuit complexity.

the invention

The technical causes of the lack of known solutions lie gen substantially in that the rotational movement of the clamping ring, which brings him into or out of engagement, over

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a arranged outside or inside the undertable drive takes place, the connection can be made to operate the clamping ring: only when the workpiece carrier r is in its raised end position and thus the stroke, movement is completed »

The object of the invention is to provide a clamping device for interchangeable and partial steps exporting workpiece carrier, in particular for machining centers, with a lifting device which raises the workpiece carrier for redistributing or f change and lowers again and the concentric one; Clamping ring is associated with the axial clamping of the workpiece carrier and the lower table, which is brought into and out of engagement about its axis by turning, whereby technical means arranged in the lower table realize the torsional movements of the clamping ring; Sieren and run in parallel to the lifting movement of the lifting device. :.

According to the invention, the object is achieved in that between the rotary member for the partial movement and the clamping ring a positive operative connection consists, in dependence on the lifting movement of the clamping ring in and disengageable is «slidable along the axis of the lower table, drehbe-weglichen Aushubring a connection part is added, which is on the one hand with an axially fixed in the rotating cam piece and on the other hand with the clamping ring, wherein the connecting part in the Hubbevvegung fixedly connected to the Aushubring, but rotatably mounted about an axis lying between the clamping ring and the rotary member and having the curved piece parallel to the stroke movement and oblique to the extending portions, According to another feature of the invention, the inclined portion is in straight, for Hubbe-, movement parallel sections on, wherein the length of the lower straight portion slightest ns the excavation height of the workpiece carrier for the partial movement corresponds and the oblique cut is dimensioned so that it causes the rotational movement of the clamping ring in and out of engagement.

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In an expedient embodiment of the invention, the connecting part of>: one about the axis lying between the clamping ring and rotary member rotatably mounted ^ in a driving flange rod, at the lower end of an end with a curvature guided head and at its upper end via a driver with the clamping ring connected pivoting fork are mounted, where P is fixedly arranged in the Ausfahrublänsch Aushubring and axially displaceable to the * rotary member.

According to a last feature of the invention, the axis lying between clamping ring and rotating part runs parallel · to the lifting movement and coincides with the longitudinal axis of the bar. When describing the function, it is assumed that a workpiece carrier is located on the undertable and is clamped. , ".

To carry out a partial step, the lifting device *: which is actuated by a drive, not shown, moves the excavating ring along the axis of the lower table by the lifting device. [r ; After the clamping ring has detached from the clamping surfaces of the intermediate ring and thus the clamping of the workpiece carrier is canceled on the lower table, the Aushubring raises the workpiece carrier in its further upward movement. Inevitably 'follows this upward movement of the Aushubring recorded connection part, ie on the fixed in Aushübrlng driving flange of the rod with the tail and attached to this head and the pivoting fork is taken. The head of the connecting part glides along the: hurry eil. axially fixed curved piece.

The upward movement for performing a partial step is completed when the workpiece carrier can rotate freely in the lower table. The head of the connecting part at this time has passed through the lower straight portion of the curved piece extending parallel to the lifting movement. Subsequently, the rotary member and thus the rotatably 'associated with this or with each other by technical means not shown lifting ring, clamping ring and workpiece carrier by the amount of the sub-step of the arranged in the lower table drive for the partial movement is rotated. The engagement position of the clamping ring remains

received at

After .vollzogenem sub-step, the downward movement of the workpiece carrier is initiated via the lifting device, as a result of which the workpiece carrier is placed on the lower table and clamped by the clamping ring. :

Is a We.rkstückträgervvechsel provided, the already described upward movement of the excavating takes place. The head of the connecting part runs through the lower straight section of the curve piece analogous to the sub-operation.

In the further upward movement of Aushubringes the head slides along the oblique to the lifting movement, curved portion in the curve piece «rotatably mounted in the driving flange and connected to the tail with the head rod thereby performs a rotational movement about its longitudinal axis by '' 'V

The swivel fork follows this movement and rotates the clamping ring over the same connected to this driver by the same angle, which means the disengagement of the clamping ring with appropriate dimensioning of the oblique curve * · shaped section in the curve piece. The adjoining the oblique portion upper straight, the Hubbeweguhg parallel extending section causes the following movement of the attached end piece head of the connecting part in the further upward movement of the Aushubringes to the transfer height of the workpiece carrier parallel to Hubbeweguhg and thus obtain the disengaged position of the clamping ring remains. If the workpiece carrier change has already taken place, the lifting device initiates the downward movement of the workpiece carrier.

iVährend the downward movement uer head of the connecting member passes through the curved piece in the opposite direction and causes the Verdrehbewegungdes clamping ring in its engaged position. üie downward movement is completed when the 'workpiece carrier is deposited on the lower table and clamped by the clamping ring.

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AuSführungsbei

The invention will be explained in more detail below on a preferred Ausfülirungsbeispiel «; , . ;

In the accompanying drawing show:;

Fig _e 1: a schematic representation of the clamping device Γ in partial section '' ;

FIG. 2 shows a section through A-A according to FIG. 1,

a) 'Workpiece carrier clamped on undertable

b) Workpiece carrier in change position

Figure 3 _e .: a section through BB of Figure Γ _'.'.; ) ^/:

.: · / In the undertable. 1 is a liubeinrichtung 2 arranged / the ^; _{: is operated} by a drive, not shown. With, aer a lifting device 2 is connected to the lifting movement of exporting drawbar I 3, the .vjird out gerflansch 4 in a fixedly arranged in the sub-table 1 La ~. On the bearing flange 4 is drehbeweg ~ i: upper upper axially fixed a rotary member 5 is mounted, which is drivable by the drive for the partial movement, which is preferably designed as a worm 'drive 6. With the tie rod 3 is an intermediate piece 7 connected to this movable along the axis of the undertable 1, an excavation ring 8 is rotatably supported on the mandrel and ' ¹ su s amme η with the intermediate piece 7'. A clamping ring 9 is angeord-net at the upper end side of the drawbar 3, which as well as / the Zv; schenstück 7 has centrally a recess into which the head of the drawbar 3 engages and thus the axial fixation of the clamping ring 9 in Klemm_richtüng is guaranteed. On the workpiece carrier 10, which is interchangeably seated on the undertable 1, is; an intermediate ring 11 fixed, which is provided with clamping surfaces 12 and through "broaches 13. The clamping ring 9 has analogously formed ^ clamping surfaces 14 and apertures 15 which are dimensionally matched to the clamping surface 12 and apertures-13, that when the clamping ring is disengaged, the IS / erk- carrier 10 can be lifted from the lower table 1 «

The centering and positioning of the workpiece carrier 10 on the lower table 1 by means of end-toothed rings 16,17 · In <Drfcähteil 5 is a curved piece 18, in which a connecting part 19 is guided axially fixed. The connecting member 19 consists of a in a driving flange 20 about its parallel to the lifting movement and its longitudinal axis corresponding axis χ rotatably mounted rod 21, at its lower end an end piece 22 is fixed with a head 23 and at the upper end of a pivot fork 24 is mounted «The driving flange 20 is arranged axially displaceable ziam rotary part 5, wherein its upper end ¹ VOm Aushubring S is firmly taken. Schwenk- The pivot fork 24 is connected via a driver 25 with the clamping ring 9,

Pas curve piece 13 has an inclined to the lifting movement, curved portion 26 which in a lower straight sectionj. 27 and an upper straight section 28 * - which each run parallel to the lifting movement, passes. The length of the lower straight portion 27 corresponds to at least the excavation height of the i-part carrier 10 for the partial movement, since the engagement position of the clamping ring 9 is to be maintained during this movement. The oblique, curvilinear; Section 26 is dimensioned so that, as the head 23 of the connecting part 19 moves along it, the rod 21

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: performed a twisting movement about the axis 15 15. The

'Rotation of the clamping ring 9 by the same angle through the attached to the pivot fork 24 driver 25 means its disengagement, which is maintained in the further upward movement due to the parallel to the lifting movement leading upper straight portion 28 of Kurverfstückes 18.

The specific advantages of the invention are: f essentially the following:

- Shortening of the changeover times during the change of the machine carrier due to the simultaneity of the movements. Lifting movement-twisting movement of the clamping ring «<

- Reduced control and technical effort, since the rotation of the clamping ring no connection of a drive is necessary »

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Claims (5)

E r f χη d u η qsans ρ rxrch 1 »Clamping device for interchangeable and part-step workpiece carriers, in particular for machining centers, with a lifting device, which raises the workpiece carrier to the far or raises to increase and lower again and concentrically a clamping ring for axial clamping of the workpiece carrier and lower table is assigned, by twisting duriTi is brought in and out of its axis, characterized in that. Between, the rotary part (5) for the partial movement and the clamping ring (9) has a positive Wi ^ connection consists of the new function of the lifting movement of the lifting device (2) the clamping ring (9) can be brought into and out of engagement. 2. Clamping device according to item 1, characterized in that of the along the axis dos .Untertisches (1) displaceable, rotatable Aushubring (8) a-connection part (19) is received, on the one hand with a rotating part (5) a ial fixed cam piece (18) and on the other hand with the clamping ring (9) is engaged, wherein the connecting part (19) in the direction of the lifting movement with the Aushubring (8) firmly connected, but one between the clamping ring (9) and the rotating part ( 5) lying axis (x) is rotatably mounted and the curved piece (18) parallel to the -Hüböewegung. and obliquely to this extending portions (26, 27, 28) 'has. \ ·. , '. , '. '' 3. clamping device according to point Ί and 2, gekennzeibhnet characterized in that aer oblique portion (26) in straight, parallel to the stroke movement section (27, 28) merges, wherein the length of the lower straight portion (27) at least the excavation height of the workpiece carrier ( 10) for the partial movement and the inclined portion (26) is dimensioned such that it causes the rotational movement of the clamping ring (9) in and out of engagement. , .- 9 - 4. Clamping device according to item 1 to 3, characterized in that the connecting part (19) of a about the axis (x) rotatably mounted in a driving flange (20) rod (21), at the lower end of an end piece (22) a head (23) guided in the curved piece (IS) and at the upper end thereof a catch (25) with the clamping ring (9). connected pivoting fork (24) are mounted, wherein the driving flange (20) in Aushubring (8) firmly attached .. assigns and to the rotary member (5) is axially displaceable. 5. Clamping device according to item 1 to 4, characterized in that the axis (x) is parallel to the lifting movement and coincides with eggs longitudinal axis of the rod (21). - For 2 sheets of drawings -! 'K WIR7 HQ A Q -. * IVi f. ö λί