AT12546U1 - MODULAR WORK TABLE - Google Patents

Abstract

The invention relates to a work table (1) with a lower frame (1) and a table top substructure (2) accommodated on the subframe (5, 6), on which a table top module (with mounting possibilities for workpiece holders for clamping of workpieces to be machined, in particular to be welded) ( The work table (1) is characterized in that the table top substructure (2) is provided on its side facing the table top module (12a, 12b, 12c) side with a number of coupling elements (10), wherein the Number of coupling elements (10) of a corresponding number of counter-coupling elements (11) on the side facing away from the workpiece of the tabletop module (12a, 12b, 12c) is assigned, and wherein the number of coupling elements (10) with the number of counter-coupling elements (11) a quick-change system (10, 11) for quick assembly and disassembly of different table top modules (12a, 12b, 12c) on the work table (1) form.Die E The invention further relates to a tabletop module (12a, 12b, 12c) for such a work table (1).

Description

Austrian Patent Office AT 12 546 Ul 2012-07-15

description

WORKTABLE AND TABLE TOP MODULE FOR THIS

The invention relates to a work table, in particular welding table according to the preamble of claim 1, as well as a suitable table top module according to the preamble of claim 15. Known welding turntables, for example, the construction series type D 653 or D 1003 of the Applicant have a base with a stand and two arms projecting beyond, between which a module swivel-mounted on the arms is suspended. The module consists of a suspended on a plate rotary drive motor and a planer arranged above it, which can be rotated over the rotary drive motor relative to the plate. The face plate is thus on the one hand pivotable relative to the horizontal and on the other hand rotatably received about its central axis on the underframe. In such welding turntables, the face plate usually has an inner passage for coolant or inert gas, as well as radial grooves in which holders can be placed on the plate to be fastened workpieces. Furthermore, the internal passage has a thread in order to be able to screw in workpieces centrically.

Such tables are used, for example, for holding pipes or the like, which during a welding operation in which the welding torch is to be fixedly mounted to be rotated about its axis, but other application scenarios are conceivable.

Also known are welding and trimming tables, which have a table top with a breadboard in which the holes matching holder or angle or the like can be inserted at any point.

Such a welding table can be found, for example, the German utility model DE 20 2007 003 300 U1.

A turntable with a table top, which may have either T-slots, as are common, for example, in milling machine tables to insert holders for aufzuspannende workpieces or a breadboard, however, is the German utility model DE 20 2007 009 628 U1 refer.

Also known from German Utility Model DE 90 15 218 U1 and European Patent Application EP 05 41 904 A1 tables are known with a fixed table top, which have a breadboard, as well as from the European patent application EP 0 266 172.

The US Patent US 2,365, 436, however, shows a processing table with a pivotable about a horizontal pivot axis arranged table top with a breadboard in the holes workpiece holder can be accommodated.

Finally, British Patent GB 271,693 shows a workpiece holder for workpieces to be welded, which has a table top with a central bore which is rotatably supported on a base frame and pivotable about a horizontal axis and has a hole pattern on which the workpiece or Holder for the workpiece, which are provided with matching to the breadboard plug-in elements, can be inserted.

Proceeding from this, the present invention seeks to provide a work table and suitable table tops, with which a quick and easy change provided on the table top of the work table mounting options for different workpiece holder is possible.

This object is achieved in terms of the work table with the features of claim 1, with respect to the table top with a table top module according to claim 15.

[0011] According to the invention, the work table has a base frame and a table top substructure accommodated on the subframe, wherein different tabletop modules can be fastened to the table top substructure which provide different mounting options for workpiece holders for clamping of have to be machined, in particular to be welded workpieces, with a quick-change system for quick assembly and disassembly of the different table top modules is provided on the work table.

The table top can be provided on its side facing the tabletop module side with a number of coupling elements, in particular three concentrically arranged coupling elements, the tabletop modules, however, on their side facing away from the workpiece each with a corresponding number of counter-coupling elements which assigned to the coupling elements on the table top are. The number of coupling elements and the number of counter-coupling elements is designed so that they form the quick-change system for fast assembly and disassembly of different desktop modules on the work table.

Advantageously, it is thus possible to make the work table available for different purposes. Thus, for example, a tabletop module with a face plate, which has radially extending to the axis of rotation Einspannnuten and a central bore, in particular threaded hole, are quickly replaced by a tabletop module having a faceplate with a breadboard and vice versa. Other tabletop modules, for example, with a face plate with T-slots or with an angle bracket to the table top under a mountable tabletop would be conceivable.

This is particularly advantageous in the case of the above-described, with pivotally and rotatably recorded table tops provided welding turntables advantageous. Because these tables are needed in most workshops so far only for a few special applications, especially when a pipe or other, centrically clamped workpiece to be welded, in which it is advantageous if the weld seam as a riser or downturned in the vertical Tabletop is welded. If the weld is thereby pulled by a robot or even with manual welding, then the horizontally arranged pipe can be rotated during the welding process, so that the welding bead is always placed in the same position of the pipe while the pipe continues to rotate. The welding torch can then always be directed essentially to the same location.

Frequently, however, such a created for a specific purpose swivel table unused set aside and frequently encountered processing cases in which workpieces are clamped on a provided with standardized workpiece holders hole pattern or the like, carried out on other tables, which must be purchased for it.

With the work table according to the invention or with the tabletop module according to the invention, it is possible by the ability to quickly and easily replace the table top to make existing welding turntables available for a variety of purposes, such as for clamping workpieces on standardized workpiece holder in a Breadboard with holes of the same size can be anchored so that not only the cost of different work tables can be saved, but also the necessary parking space.

Advantageously, each coupling element on the table top substructure may have a table shell module facing ball socket and each counter-coupling element projecting from the workpiece side facing away from the table top module pin with a spherical foot portion which can be placed in the ball socket. An inverse construction of coupling element and counter-coupling element would be conceivable. By the ball socket in the spherical foot portion results in a self-centering of the counter-coupling element in the coupling element.

Are three particular concentric arranged on an axis ball pans and three associated, correspondingly shaped spherical foot sections provided, then there is a stable in the plane and tilt-free storage of the tabletop module on the Austrian Patent Office AT12 546U1 2012-07-15

Tabletop base of the worktable with minimal construction effort.

At which the spherical foot portion of the pin opposite end of the pin can then be provided a mounting flange or body, on which the counter-coupling element is attached to a face plate of the tabletop module.

If the pin has a leg portion, so for example, a spherical foot portion and the fastening body intermediate portion to which a relative to the foot portion undercut receptacle is provided for a bolt, and each coupling element has a corresponding latch, which between a locked position in which he engages the undercut receptacle and an unlocked position in which he does not engage in the undercut receptacle on the associated mating coupling element, movably received on sides of the coupling element, succeeds in a reliable mounting of the table top module placed on the work table, even if the table top module should be pivoted out of the horizontal, especially when the latch is biased in the locked position.

Advantageously, to each coupling element attached to the table top substructure bolt guide, or a fixed to the table top housing with such a latch guide, in which the bolt between the locked and the unlocked position is movably, in particular slidably received.

Particularly advantageous in terms of a quick and easy replacement of the table-top modules, it is when an actuating mechanism for actuating the bolt is provided on each coupling element, wherein in a biased in the locked position latch only an actuating mechanism for moving the bolt the locked position must be provided in the unlocked position. This is especially true when a plurality, for. B. three coupling elements are provided and a common actuating mechanism is arranged for preferably synchronous actuation of all bars.

It should be noted that if the counter-coupling elements described and the associated table top module, the coupling elements are provided on the work table, the actuating mechanism for the latch on the tabletop module can also be on the tabletop module.

For this, the actuating mechanism may comprise a rotatably received on the table top substructure turntable, which concentrically arranged to its axis of rotation, spiral segment-shaped guide grooves, in each of which an actuating bolt protrudes, which in turn is connected to one of the bolt, wherein the bolt guides, in the the bars are respectively received, preferably extend in a direction extending radially to the axis of rotation of the hub direction. Via a rotation of the turntable, it is thus possible centrally to simultaneously lock all coupling elements with the associated counter-coupling elements when a new table top module has been placed on the work table, or to unlock to remove the currently mounted table top module from the work table.

For this purpose, the turntable may have a plurality, in particular three arranged concentric with its axis of rotation arranged Mitnehmersteine or grooves, via which the turntable can be operated with a corresponding tool.

Advantageous developments are the subject of the remaining dependent claims and will be explained in more detail in connection with the description of an illustrated in the accompanying drawings, advantageous embodiment of the invention. For this reason alone, it goes without saying that the features of the embodiment of the invention explained below can be used not only in the stated, but in any reasonable sense combination with the features of claims 1 and 15, without departing from the scope of the invention ,

Overall, with the invention, a work table with an extension set consisting of different tabletop modules can be offered, with the expansion set, for example, a tabletop module having a classic on welding turntables of the type described above Art usual table top with radial grooves and centric media supply bore, a table top with a breadboard, and a table top with a cantilever coplanar to the axis of rotation arranged clamping surface or table top can contain.

[0038] [0038] [0038] [0038] [0038] [0038] [0038]

In the figures show:

Figure 1 shows a work table according to an embodiment of the invention, on which a tabletop module is received according to an embodiment of the invention;

Figure 2 is a plan view of a rotatable relative to a base of the work table area of the table top of the work table shown in Figure 1 with the coupling elements in the unlocked position, wherein the counter-coupling elements attached to the table top module shown in Figure 1 are located;

Figure 3 is a view corresponding to Figure 2, but in which the coupling elements are in a locked position.

Figure 4 is a partial sectional view taken along the line IV-IV in Figure 3;

Figure 5 is a side view of the illustrated in Figures 2 and 3, rotatable portion of the table top substructure with marked, received in the coupling elements counter-coupling elements;

Figure 6 is a sectional detail view of a coupled in an associated coupling element counter-coupling element according to the embodiment of the invention shown in the preceding figures;

Figure 7 is a side view corresponding to Figure 6;

Figure 8 is a perspective view of the tabletop module shown in Figure 1;

FIG. 9 is a plan view of a tabletop module provided for replacing the table top module shown in FIG. and

Figure 10 is a plan view of another, provided for replacement against the table top module shown in Figure 1 tabletop module.

Reference is first made to the figure 1, which shows a generally designated 1-Neten work table according to an advantageous embodiment of the invention. The work table in this case has a stand 5, consisting of a stand 6 and two arms 5 projecting above it, on which a table top substructure designated as a whole by 2 is pivotably received.

Here, a serving as a rotary actuator 8 electric motor 8 is provided, which is mounted with its output shaft in one of the cantilevered arms 5, wherein at the free end of the output shaft, a pinion 3 is provided, via which a mounted on the table top 2 gear segment 4 drivable is. The table top substructure 2 is on the one hand via a guided through gear segment 4 layer shaft stub on the one cantilever 5 and on the other hand via a corresponding, by a gear segment 4 dimensionally corresponding arc segment guided through layer stub shaft on the base frame 5, 6 pivotally suspended (see arrow).

On the gear segment 4 on the one hand and the dimensionally corresponding to the gear segment 4 arc segment on the other hand, a plate 34 of the table top 2 is fixed to the underside a serving as a rotary drive 7 electric motor is flanged via a not shown reduction gear, which with its output shaft with a on the plate 34 recorded Unterbauscheibe 20 is connected. The cantilever arms 5 are each formed integrally with a side wall portion of the stand 6 on two sides wall components, wherein the two each comprise a cantilever 5 and a side wall portion of the stator 6 comprehensive sidewall components a floor panel are connected to each other and between the two side panels a control cabinet 9 is received, in which the control electronics for the drives 7, 8 is added. On the table-top substructure 2, a tabletop module 12c is rotatably drivable via the rotary drive 7 (see arrow), which will be explained in more detail below in connection with FIG.

To accommodate the tabletop module 12c on the table top substructure three concentric with the axis of rotation arranged coupling elements 10 are screwed to each other at the rotationally driven Unterbauscheibe 20 with the same angular distance, as can be seen in particular from Figures 2 and 3. As also shown in FIGS. 2 and 3, counter-coupling elements, which are each shown in the coupling elements 10 and designated 11, each have a fastening flange with which they can be attached to the tabletop module 12c (or other suitable tabletop modules, in particular that shown in FIG 9, the table top module 12b or the tabletop module 12a shown in FIG. 10).

On the opposite of the plate 34 of the base 2 via the rotary drive 7 rotatably received undercarriage plate 20 while another turntable 28 is placed, which in turn is rotatable relative to the Unterbauscheibe 20. The turntable 28 is guided rotatably about the axis of rotation of the Unterbauscheibe 20 between the coupling elements 10, as will be explained below even more. Further, the hub 28 concentrically arranged on its axis of rotation, spiral segment-shaped guide grooves 29 which are associated with the three coupling elements 10, ie distributed at the same angular distance as the coupling elements 10 on the circumference of the hub 28. The coupling elements 10 are arranged at the same angular distance from one another and thus form an equilateral triangle, consequently also the mating coupling elements 11 attached to the tabletop module 12c (or another tabletop module 12a, 12b of the associated tabletop module set).

As is indicated on one of the screwed onto the Unterbauscheibe 20 coupling elements 10, in each case a bolt 30 is guided in the spiral segment-shaped guide grooves 29, which in a rotational actuation of the rotary disk 28 from a radially inner position (Figure 2) in a radially outer Position (Figure 3) or back along a radially extending guide in the coupling element 10 moves. 2, the coupling elements 10 are unlocked, so that the counter-coupling elements 11 (and thus the tabletop module 12c) can be removed, in the position shown in FIG. 3, the bolts 29 are the coupling elements 10 locked against it, so that the patch table module 12c on the counter-coupling elements 11 securely attached to the table top 2 and thus to the base 5, 6 of the work table 1 is fixed.

To actuate the turntable 28 and thus an actuating mechanism 28, 29, 30 for synchronous locking or unlocking of all coupling elements 10 while three equiangularly spaced from each other on the top of the turntable arranged Mitnehmersteine 23 are provided so that a suitable tool or, if the actuating mechanism 28, 29, 30 is correspondingly smooth, the rotary disk 28 can be manually moved from the position shown in FIG. 2 into the position shown in FIG. 2 and back.

Furthermore, it can be seen from Figures 2 and 3, a centrally arranged to the rotation axis pipe section 21 of the tabletop module 12c, which is gas-tightly connected to a central bore 35 (Figure 8), so for example on the bottom of a via the counter-coupling elements 11 rotatably mounted on the Unterbauscheibe 20 recordable face plate 19c is welded. The pipe section 21 is guided through a central opening in the turntable 28 and at the same time can serve as a centering for the turntable 28. Furthermore, it can be connected to a centrally arranged in the sub-base plate 20 Medienzufüh-, for example, via a corresponding seal on a provided in the sub-base plate 20, be pressed central bore or with a connected through such a central bore in the sub-base plate 20 media supply hose connected. By the media supply and the pipe section 21 thus required for welding inert gas or a cooling liquid can be supplied. But it would also be possible to connect an exhaust system here. Furthermore, the central bore in the face plate 19c and the patch thereon tubular portion 21 have an internal thread into which a workpiece holder can be screwed. In the table top module 12c shown in FIG. 8, a first workpiece can then be fastened to the face plate 19c on the one hand via the central bore 35 or the tube section 21 and to a tabletop 41 secured to it via an angle bracket 14 or two angle sections 40 with a hole pattern a second workpiece, which are to be welded together.

From the figure 4, which shows a section along the line IV-IV in Figure 3, the internal structure of the coupling elements 10 and the counter-coupling elements 11 and the coupling of the latch 16 of the coupling elements 10 to the from the hub 28th clearly formed with the guide grooves 29 and the actuating pin 30 actuating mechanism 28, 29, 30, as will be explained in more detail in connection with Figure 6.

The counter-coupling element designated as a whole by 11 in this case has a pin 13 projecting from its fastening flange designated by 18 to the table-top substructure 2, or to the sub-base plate 20, which in turn has a spherical foot section 14. The pin 13 has in an arranged between the mounting flange 18 and the spherical base portion 14 leg portion 17 has an undercut 26. The undercut 26 is located on a latch 16 side facing the pin 13, in the illustrated embodiment, ie on the axis of rotation directed towards the side of the pin thirteenth

The coupling elements 10, however, each have a designated overall housing 25 on which on the one hand a receptacle for the spherical foot portion 14 of the associated counter-coupling element 11 is formed and on the other hand a latch guide receptacle for the designated 16 latch, which the undercut latch receptacle 26 at the leg portion 17 of the pin 13 of the associated counter-coupling element 11 is assigned.

The bolt 16 is received in the locking guide receptacle in the radial direction to the axis of rotation in a coplanar to the surface of the Unterbauscheibe 20 level and connected to the axially parallel to the axis of rotation projecting actuating bolt 30, which in turn with its free end in the associated helical guide groove 29th engaged in the turntable 28. Upon rotation of the turntable 28 of the latch 16 is thus shifted from engaging in the undercut latch receptacle 26 position in a not engaging in the undercut latch receptacle 26 position and back and thus the coupling elements 10 and the mating coupling elements 11 formed quick-change device 10,11 coupled or uncoupled.

The receptacle for the spherical foot portion 14 of the pin 13 of the associated counter-coupling element 11 in this case has in its bottom region a designated 15 deposit, which forms a ball socket 15 for the spherical foot portion 14. If the respective tabletop module 12a, 12b, 12c with its mating coupling elements 11 inserted into the coupling elements 10 on the table top 2, the spherical design of the spherical foot sections 15 and the associated ball pans self-centering, so that the tabletop module 12a, 12b, 12c centered exactly without unbalance can be put on. Furthermore, the receptacle has a round, the maximum diameter of the spherical foot portion 15 of the pin 13 corresponding diameter around the ball socket 15 encircling side wall 27 on which the spherical foot portion 14 is supported in addition to the ball socket 15.

As can be seen in particular from Figure 7, the undercut Rie- 6/18

Claims (23)

In this case, on its side facing the spherical foot section 14, a clamping section 33, which rises in a wedge shape from its side facing the latch 16, is pushed onto the latch 16 with an associated, preferably also bevelled section and is jammed thereby, when an actuation of the hub 28 and thus via the actuating pin 30 of the latch 16 takes place. As can be clearly seen in particular from the figure 4, while the rotary disk 28 is supported with its radial outer circumference on a radial inner wall of the housing 25 of the coupling elements 10 and is placed on the underside mounted on the housing 25 each sliding washers 22. On the other hand, from above the turntable 28 is supported, on the one hand, via a shoulder in the region of its radial outer circumference and, on the other hand, via a cover plate 32 screwed onto the housing 25 radially inwards in the region of the locking guide receptacle. [0054] FIG Exchange against the shown in Figure 1 tabletop module 12c provided table top module 12b, which has a face plate 19b arranged in a hole pattern holes 22, in the standardized workpiece holder for clamping a workpiece can be used, in addition a central threaded hole 35 as a media feedthrough or Screwing a matching workpiece holder is provided. In turn, the counter-coupling elements 11 described above are mounted on the rear side of the face plate 19b. Likewise, the counter-coupling elements 11 are on the back plate 19a shown in Figure 10, provided for replacement of the table top module 19c tabletop module 12 A back mounted. The face plate 19a of the tabletop module 12a also has a central threaded bore, as well as radial grooves for clamping of suitable workpiece holders. Modifications and modifications of the embodiment shown are possible without departing from the scope of the invention. Claims 1. A worktable (1), in particular a welding table (1), comprising: a base frame (1) and a table top substructure (2) received on the base frame (5, 6), on which a mounting bracket for workpiece holder for clamping of machined, in particular to be welded workpieces provided table top module (12a, 12b, 12c) can be fastened, characterized in that the table top (2) on its the tabletop module (12a, 12b, 12c) facing side with a number of coupling elements (10), in particular three concentric with each other arranged coupling elements (10) is provided, wherein the number of coupling elements (10) of a corresponding number mating coupling elements (11) on the side facing away from the workpiece of the tabletop module (12a, 12b, 12c) is assigned, and wherein the number of coupling elements (10) with the Number of counter-coupling elements (11) a quick-change system (10, 11) for quick assembly and disassembly of unterschiedl form the tabletop modules (12a, 12b, 12c) on the worktable (1). 2. Worktable (1) according to claim 1, characterized in that each coupling element (10) to a tabletop module (12a, 12b, 12c) facing ball socket (15) for receiving a spherical foot portion (14) of the workpiece facing away from the side of the tabletop module (12a, 12b, 12c) projecting pin (13) of the associated counter-coupling element (11). 3. Work table (1) according to claim 1 or 2, characterized in that each coupling element (10) has a latch (16) which between a locked position in which the associated counter-coupling element (11) in its position in the coupling element (10 ) is held and an unlocked position in which the associated counter-coupling element (11) is released, operable. 7/18 Austrian Patent Office AT12 546U1 2012-07-15 4. Worktable according to claim 3, characterized in that the bolt is biased in the locked position. 5. Worktable (1) according to claim 3 or 4, characterized in that each coupling element (10) has a fixed to the table top (2) housing (25) with a bolt guide, in which the bolt between the locked and the unlocked position movable , in particular slidably received. 6. Worktable (1) according to claim 5, characterized in that the housing (25) of each coupling element (10) has an opening towards the tabletop module receptacle for the pin (13) of the associated counter-coupling module (11), in which the ball socket ( 15) is formed, wherein the bolt guide at an angle, in particular transversely to the intended insertion direction of the pin (13) of the associated counter-coupling module (11) and is in the direction of the tabletop module (12a, 12b, 12c) out above the ball socket (15), such that the latch (16) engages between the locked position, in which it engages in a latch receptacle undercut the foot section (14) of the pin (13) of the assigned mating coupling module (11) used in the pin receptacle, and the unlocked position in which it does not engage in the undercut recording, slidably received. 7. Worktable (1) according to claim 6, characterized in that the pin receiving a with a round, the maximum diameter of the spherical foot portion (14) of the pin (13) of the associated counter-coupling module (11) the ball socket (15) at least partially surrounding the side wall (27). 8. worktable (1) according to one of claims 3 to 7, characterized in that a plurality, in particular three coupling elements (10) are provided, and an actuating mechanism (28, 29, 30) for synchronously operating all bars (16), at least is provided for synchronously moving all the latch (16) from the locked position to the unlocked position. 9. work table (1) according to claim 8, characterized in that the actuating mechanism (28, 29, 30) rotatably on the table top (2) recorded turntable (28) which concentrically arranged to its axis of rotation, spiral segment-shaped guide grooves (29) in which in each case an actuating bolt (30) projects, which is connected to one of the bolt (16), wherein each of the bolt guides, in which the latch (16) are respectively received, extends in a direction extending radially to the axis of rotation. 10. Worktable (1) according to claim 9, characterized in that the turntable (28) has a plurality, in particular three concentric with its axis of rotation arranged Mitnehmersteine (23) for rotational actuation via a corresponding tool. 11. Worktable (1) according to claim 9 or 10, characterized in that at least three coupling elements (10) are provided, the housing (25) concentric with the axis of rotation of the hub (28) are arranged and each have a turntable guide receiving, in which the hub (28) engages, so that the turntable (28) is rotatably centered, wherein the turntable guide receptacles preferably also have boundaries (22, 32) for the movement of the turntable (28) in the axial direction. 12. Worktable (1) according to any one of the preceding claims, characterized in that the table top substructure (2) has a preferably rotatably received Unterbauscheibe (20) on which the coupling elements (10) are fixed, and preferably a rotary drive (7) for Drehantreiben the Unterbauscheibe (20) is provided, wherein the number of coupling elements (10) are preferably arranged concentrically around the axis of rotation of the Unterbauscheibe (20) and the hub (28) - if present - preferably about the axis of rotation of the Unterbauscheibe (20) is rotatable. 8/18 Austrian Patent Office AT12 546U1 2012-07-15 13. Worktable (1) according to any one of the preceding claims, characterized in that the table top substructure (2) is pivotally mounted on the lower frame (5, 6) and a pivot drive (8) for pivoting the table top substructure (2) relative to the lower frame (5 , 6) is provided. 14. Worktable (1) according to any one of the preceding claims, characterized in that on the table top (2) at least one table top module (12a, 12b, 12c) is attached according to one of claims 15 to 23. 15. Tabletop module (12a, 12b, 12c) with mounting options for workpiece holder for clamping of machined, in particular to be welded workpieces thereon, and suitable for mounting on a work table, in particular on a work table (1) according to one of the preceding claims, characterized in that the tabletop module (12a, 12b, 12c) is provided on its side facing away from the workpiece with a number of counter-coupling elements (11), in particular three counter-coupling elements (11) arranged concentrically about an axis, wherein the number of counter-coupling elements (11) of a corresponding number of coupling elements (11) 10) is assigned to the table top module (12a, 12b, 12c) facing side of the table top (2) of the work table (1), and wherein the number of counter-coupling elements (11) with the number of coupling elements (10) a quick-change system (10,11) for quick assembly and disassembly of different tabletop modules (12a, 1 2b, 12c) on the work table (1). 16. table top module (12a, 12b, 12c) according to claim 15, characterized in that the counter-coupling elements (11) each one of the workpiece facing away from the workpiece side of the tabletop module (12a, 12b, 12c) projecting pin (13) having a spherical foot portion ( 14) for receiving in the ball socket (15) of the associated coupling element (10) on the table top substructure (2). 17. Table top module (12a, 12b, 12c) according to claim 16, characterized in that the pin (13) each projecting from an example disk-shaped mounting flange (18) on which the counter-coupling element (11) on a face plate (19a, 19b, 19c ) of the tabletop module (12a, 12b, 12c) is attached. 18. table top module (12a, 12b, 12c) according to claim 16 or 17, characterized in that the pin (13) has a leg portion (17), which is opposite the foot portion (14) undercut receptacle (26) for one on the associated coupling element (10) provided latch (16) which engages in its locked position in the undercut receptacle (26) and not in its unlocked position. 19. tabletop module (12a) according to any one of claims 15 to 18, characterized in that the face plate (19a) extending radially to the axis of rotation clamping grooves (20) and a central bore (35), in particular threaded bore (35). 20. table top module (12b) according to one of claims 15 to 18, characterized in that the face plate (19b) has a breadboard with spaced apart from each other holes (22) through the face plate (19b). 21 tabletop module (12c) according to one of claims 15 to 18, characterized in that on the face plate (19c) an angle arm (40) is fixed, via which a platen (41) with mounting options for workpiece holder for clamping of machined, in particular to be welded workpieces at an angle, in particular right angle to the face plate (19c) is fixed, in particular a perforated grid plate (24). 22. Table top module (12a) according to claim 19, 20 or 21, characterized in that the face plate (19a) on the central bore (35) in the face plate (19b, 19c) gas-tight patch pipe section (21), which to the table base (2) projecting out and with a plate through the base (20) guided media supply is connectable. 9/18 Austrian Patent Office AT12 546U1 2012-07-15 23. Worktable (1) according to any one of claims 1 to 14, characterized in that in addition to the work table (1) from a different table top modules (12a, 12b, 12c) existing extension set is provided, for example consisting of a table top module (12a) according to claim 19, a tabletop module (12b) according to claim 20, and / or a tabletop module (12c) according to claim 22 or 23. For this 8-sheet drawings 10/18