WO2012151601A1

WO2012151601A1 - Manufacturing plant having a tool-changing system

Info

Publication number: WO2012151601A1
Application number: PCT/AT2012/050064
Authority: WO
Inventors: Karl BADEGRUBER; Stefan RUSCHITZKA
Original assignee: Trumpf Maschinen Austria Gmbh & Co. Kg.
Priority date: 2011-05-10
Filing date: 2012-05-09
Publication date: 2012-11-15
Also published as: AT511078B1; AT511078A4; EP2707160B1; EP2707160A1

Abstract

The invention relates to a manufacturing plant (1), in particular for the open-die bending of workpieces (2) to be manufactured from sheet metal, comprising a bending press (3) having a machine frame (8) and pressing beams (13, 16) and also tool holders (19, 20), arranged on the pressing beams (13, 16), for a bending tool (4), a tool store (30), a rear stop unit (31) having a stop element (32), and also a manipulation apparatus (33) for moving the bending tool (4) between the tool store (30) and the tool holders (19, 20). The stop element (32) and the manipulation apparatus (33) are arranged opposite one another and in opposing orientations on a common carrier (34) and are mounted so as to be rotatable about a pivot axis (35). The carrier (34) is pivotable from a first position, in which the stop element (32) faces the bending tool (4) held in the tool holders (19, 20), into a second position, in which the manipulation apparatus (33) faces the bending tool (4) held in the tool holders (19, 20).

Description

Production plant with a tool change system

The invention relates to a production plant, in particular for the free-form bending of workpieces to be produced from sheet metal, with a tool change system, as described in claim 1.

From CH 668 035 A5 a manufacturing plant for bending to be produced from sheet metal workpieces with a bending press, in which the tool bar receptacles for a bending tool with at least one bending punch and at least one bending die are known. On the side facing away from an operator side of the press bar a tool storage is located behind the upper press bar. The bending tools to be stored are also arranged successively in the direction of the depth of the machine frame in a hanging arrangement at the tool storage locations provided for this purpose. Furthermore, the production plant comprises a back stop unit with a stop element, which serves for positioning the sheet to be processed on the side facing away from the operating side of the press bars. The back stop unit further comprises a positioning or traversing device with which the back stop unit and, connected thereto, the stop element can be moved in accordance with the desired bending position for the sheet metal. On the stop element support arms are further pivotally mounted about a horizontal axis. At the ends of the support arms respectively retaining bolts are arranged, which can be used in recesses in the respective bending tool. A further embodiment provides for an arm projecting vertically above the stop element, from which a driving pin projects for manipulation of the bending tool in the direction of the press beams. The disadvantage here is that the one or more in the vicinity of the stop element arranged support arms limit the manipulation space of the Hinteranschlageinheit.

Another system for processing sheet material has become known from DE 692 03 307 T2. In a first embodiment, the bending tool comprising upper tool and lower tool extends almost over the entire width of the bending press and can together as a unit from the also extending over almost the entire width of the kickback unit from its working position to a storage position on the Sidewalls are relocated. For this purpose, the stop element near the stop surface on a vertically upstanding locking pin, which can be used in a base plate of the tool assembly. In addition, the stop element can be supported by a support plate in order to be able to support or support the weight of the entire tool arrangement during its displacement from the working position to the storage position. In a further embodiment (FIG. 7), only the tool upper part is exchanged and received by the backgauge unit. For this purpose, the back stop unit has a tool upper part holder, which is aligned in the same direction as the stop element. A gripper is inserted into a recess of the upper tool part and removed after loosening the jaw of the upper die of the press bar and spent by means of the Hinteranschlageinheit to a arranged on the side walls behind the upper press bar tool storage. A disadvantage of this embodiment is that the holder and clamping of the tool parts to be changed in the immediate vicinity of the stop element takes place and thereby again the manipulation is free space in the region of the stop element is limited.

The present invention has for its object to provide a manufacturing facility in which the tool change can be performed quickly and easily and beyond sufficient free space for the manipulation of the sheet to be deformed in the region of the stop element is available.

This object of the invention is solved by the features of claim 1. The resulting from the features of claim 1 advantage is that due to the arrangement of both the stop element and the manipulation device for holding individual components of the bending tool on a common carrier, but in opposite and in opposite directions, if elected corresponding pivoting of the carrier each of the auxiliary devices can be the press beam or the tool holders are turned, depending on which is currently needed. For the bending process to be carried out, the stop element can thus be directed in a known manner towards the tool holders and thus to the sheet to be machined, without the manipulation device acting disturbing and space-limiting in this environment. Due to the deliberately selected pivoting action of the support by parts of the backgauge unit, it is possible for the corresponding workstation tool change the manipulation s device are applied to the or to be changed bending tools. Again, the Auslangen can be found again with the smallest sizes, without having to take into account further protruding components in the tool removal from the tool holders. As a result of the arrangement on a common carrier and the provision of a separate pivot axis, the stop and the manipulation device can be formed independently of each other on each end of the carrier and the respective element can be moved to the desired working position as required. The then not required component or element is then arranged distanced on the side facing away from the carrier or formed and is not in the working position located in the element or component in the way. The

Training or integration of the pivot axis of the carrier directly into the Hinteranschlageinheit requires no additional high design effort and can be easily integrated with. Due to the currently available movement and adjustment of Hinteranschlageinheiten the integration of the manipulation device to a common carrier is easy and inexpensive to implement.

Also advantageous is a further embodiment according to claim 2, as in a simple horizontally oriented pivoting movement of the Zuwendungsrichtung the stop element and the manipulation device is easy to carry out. With only a slight pivoting of the stop element about the pivot axis but also an inclination of the sheet to be processed can be adjusted before the forming process in the bending press so.

Also advantageous is an embodiment according to claim 3, since the possibility is created by the hollow profile-shaped design of the pivot axis in the interior thereof, supply lines for actuating the manipulation device and / or the stop element to pass. Thus, free disturbing lines are avoided in the backgauge unit. Due to the design according to claim 4, it is possible to perform a precise adjustment of the rohrför- shaped component. Furthermore, this makes it possible to use a ball screw drive for the translational and / or rotational movement, which can preferably perform these two movements simultaneously. According to another Au sführungs variant according to claim 5, a simple possibility of coupling the bending tool is created with the manipulation device so independent of the stop element. Also advantageous is a development according to claim 6, as can be used on already used and well-tried coupling or gripping options with which sufficient space and a sufficient support and clamping can be achieved.

In the embodiment according to claim 7, it is advantageous that simultaneously with the gripping or hemming of the bending tool with the manipulation device, a release or decoupling of the clamped bending tool in the area of the press beams and / or the tool storage can take place.

Through the development according to claim 8 ensures that sufficient space for the arrangement and freedom of movement of the Hinteranschlageinheit is created between the press bar and the rear end of the machine frame and still no additional space or space required for the arrangement of the tool storage. Thus, the tool memory can be easily located within the machine frame, without requiring additional space is required. Furthermore, the transport path of the respective bending tool between the tool holder and the tool store is kept relatively short and compact. Thus, the tool change time is also shortened due to the short transport routes. Furthermore, it can also be a loading of the tool storage from the back, without causing the production process in the area of the operating side is disturbed or must be interrupted.

Due to the design according to claim 9, the arrangement of several bending tools can be done in a space-saving manner in the smallest space in almost one plane above the other.

Also advantageous is an embodiment according to claim 10, as this also additionally a high memory density can be achieved over the existing space between the side walls parts of the machine frame. According to an embodiment as described in claim 11, the possibility of providing memory locations is thus created in a simple manner. This can be found with minimal footprint Auslangen and still be provided a variety of bending tools on the back of the machine frame.

In this case, an embodiment according to claim 12 proves to be advantageous, since so a related component is created as a tool storage, which has sufficient stability for receiving a plurality of bending tools. Furthermore, there is also the possibility of later simply attaching the tool designed as a supporting frame to already existing bending presses.

According to an advantageous embodiment according to claim 13 can be dispensed with in addition to the high space and the associated high number of memory locations on the additional arrangement of intermediate elements for attachment.

Finally, however, an embodiment as described in claim 14 advantageous because it provides the ability to relocate the tool storage relative to the machine position, so as to provide an unhindered access to the interior of the press for necessary maintenance or inspection activities , Furthermore, access to the interior of the bending press can thereby be prevented even when the tool store is in operation, in which case the tool store also serves to some extent as a protective element.

For a better understanding of the invention, this will be explained in more detail with reference to the following figures.

Each shows in a highly schematically simplified representation:

Figure 1 shows a s manufacturing släges in front view.

Fig. 2 shows a similar production s as shown in Figure 1 with Hinteranschlageinheit and tool storage, in a perspective view from behind. Fig. 3 shows a possible embodiment of a Hinteranschlageinheit, in side view.

By way of introduction, it should be noted that in the differently described embodiments, the same parts are provided with the same reference numerals or the same component designations, wherein the disclosures contained in the entire description can be mutatis mutandis to the same parts with the same reference numerals or component names. Also, the location information chosen in the description, such as top, bottom, side, etc. related to the immediately described and illustrated figure and are to be transferred to the new situation mutatis mutandis when a change in position.

FIGS. 1 to 3 show a production plant 1 for free-form bending of workpieces 2 to be produced from sheet metal in a highly schematically simplified representation.

The manufacturing s anläge 1 comprises a bending press 3, in particular a press brake, for manufacturing the workpieces 2 or workpieces between relatively adjustable bending tools 4, such as punch 5 and Biegegesenk 6. The punch 5 can also be used as an upper tool and the bending die Also referred to as a lower tool.

A machine frame 7 of the bending press 3 comprises, for example, a base plate 8, on which are vertically upstanding, spaced apart in the transverse direction and parallel to each other side cheeks 9, 10 are arranged. These are preferably connected to each other by a solid, formed for example from a sheet metal part cross member 11 at their distance from the bottom plate 8 end portions. The side cheeks 9, 10 are approximately C-shaped to form a free space for forming the workpiece 2, wherein a fixed, in particular on the bottom plate 8 upstanding, press bar 13 is attached to front end faces 12 of bottom flanges of the side cheeks 9, 10. This press bar 13 may also be referred to as a table bar. At front end faces 14 of legs removed from the base plate 8, a press bar 13 of relatively adjustable further press bars 16, in particular a pressure bar, is guided in line guides 15 in a manner that guides the table bar. On mutually opposite, mutually parallel end faces 17, 18 of the two press Beams 13, 16 are tool holders 19, 20 arranged and configured for assembly with the bending tools 4.

The bending press 3 shown has drive arrangement 21 for the adjustable press beam 16, namely the pressure beam, at least one, here two drive means 22, which are e.g. are fed with electrical energy from a power grid 23 and additionally may be connected to a control device 24 line. By way of example, the operation of the bending press 3 is controlled via a line-connected input terminal 25 connected to the control device 24.

The drive means 22 may be, for example, electromotive spindle drives 26, as they are generally known, of which adjusting means 27 for a reversible positioning movement of the upper beam bar 16 formed by the pressure bar with this, for example, are drive-connected. Regardless of this, it would also be possible to form the drive means 22 by means of hydraulically and / or pneumatically actuatable actuating means. It can find cylinder piston arrangements application. But there would also be other drive means, such as eccentric drives, toggle drives, rack drives, etc. conceivable. Further details required for the operation of such a bending press 3, such as safety devices, stop arrangements, control and measuring devices are omitted in the subject description to avoid unnecessary length of the description. Furthermore, the manufacturing plant 1 may also include a manipulator not shown here, which at least a piece of it takes from a supply stack of sheets to be deformed or abzukantenden and spends in the work area or the operating side of the bending press 3. Furthermore, it is shown here in simplified form that the bending tools 4, in particular the bending punch 5 and / or the bending die 6, can each have their own recesses 28, 29 for manipulating them. Manipulating the bending tool 4 is understood here to mean that this or its bending punch 5 and / or bending die 6 are automated taken from a simplified in Fig. 2 shown tool memory 30 and automatically to one of the tool holders 19, 20 of the press bars 13, 16 spent and used there and clamped is supported. In this case, it is also possible to speak of a tool change system with which the exchange processes can be carried out with the requisite plant components.

For exchanging corresponding bending tools 4, these are removed from the tool holders 19, 20 after the clamping holder of the bending tool or tools 4 and replaced by another bending tool 4. In this case, the bending tool 4 to be exchanged is brought back into the tool store 30 or the tool depot and stored sorted to be removed there later for another bending operation and used in the tool holders 19, 20. For handling during the exchange process, the recesses 28, 29 serve in the bending tool 4. However, other possibilities would also be conceivable in order to be able to form a clamping connection between the manipulation device 33 described in more detail below and the bending tool 4 or the bending die 4 and / or bending die 6 forming the bending tool 4.

As can now better be seen from a synopsis of FIGS. 2 and 3, the tool storage 30 is arranged on a side of the press beams 13, 16 facing away from an operating side. The operator side is understood here to be that region on the bending press 3 from which the supply and handling of the metal sheets to be formed takes place toward the finished workpiece 2. Starting from the operating side, the machine frame 7, in particular its side cheeks 9, 10 extend to a rear side of the machine frame 7, which is referred to below as depth or depth extension of the bending press 3, in particular of the machine frame 7. The lateral cheeks 9, 10 of the machine frame 7, which are spaced apart here in the transverse direction of the bending press 3, form a width of the bending press 3 or of the machine frame 7, the press beams 13, 16 with the parts arranged thereon or in the direction of the width of the machine frame 7 . trained tool holders 19, 20 extend.

Between the side cheeks 9, 10 and on the side facing away from the operating side of the press beams 13, 16 at least one but preferably more Hinteranschlageinheiten 31 is further provided or arranged. Such Hinteranschlageinheiten 31 are sufficient It is known and it is not to unnecessarily extend the description, here omitted a more detailed description. The back stop unit 31 comprises at least one stop element 32 which serves to position the sheet to be processed on the side of the press beams 13, 16 facing away from the operating side. In addition, the stop element 32 is adjustable relative to the machine frame 7. This serves to ensure that the sheet to be deformed, for example, on the bending die 6 can be slid so far in the direction of the depth of the machine frame 7 until the displacement is limited by the first prepositioned stop member 32. In this state, an end edge of the sheet to be bent usually comes into abutment against a stop element 32, which is usually designed as a stop finger. Depending on the workpiece to be machined, the stop element 32 is displaceable by means of the entire back stop unit 31 and positioned at the predefined locations. In a multiple arrangement of stop elements 32 each at a plurality, preferably independently adjustable Hinteranschlageinheiten 31, a high variety of stop positions can be achieved.

Furthermore, the manufacturing plant 1 may also in addition to the above-described manipulator for manipulating the sheet or the workpieces to be produced 2 also include its own and independently acting manipulation device 33, which specifically for the movement of the bending tool 4 and the bending tool 4 forming bending - stamped 5 and / or bending die 6 between the tool memory 30 and the tool holders 19, 20 is used. In this embodiment shown here, the manipulation device 33 is arranged on the back stop unit 31.

In the position of the two Hinteranschlageinheiten 31 shown in FIG. 2 each stop member 32 is shown in an orientation which is directed to the side facing away from the operator side of the press beams 13, 16 and thus in the direction of the back of the machine frame 7. The manipulation device 33 in each of the backstop units 31 is shown in this illustration in a position facing the press bar 13, 16.

In order to combine the stop element 32 and the manipulation device 33, it is further provided here that these are arranged or formed on a common carrier 34. The carrier 34 in turn is rotatable about a pivot axis 35 on a base frame Stored 36 and preferably has a narrow, elongated training. The fact that the carrier 34 carries or forms both the stop element 32 and the manipulation device 33, these are arranged or formed in an opposite and in opposite directions. In this case, it would also be possible to speak of a diametrical arrangement of the stop element 32 with respect to the manipulation device 33.

As can now be better seen in FIG. 3, an adjusting device 37 is indicated in the base frame 36, with which it is possible to connect the carrier 34 and the stop element 32 and the manipulation device 33 from a first position to a second position to pivot. The first position considered here is that position in which the stop element 32 is facing the tool holder 19, 20 held bending tool 4. In this position, a positioned striking the sheet to be deformed toward the finished workpiece 2 on the one or more stop elements 32 is possible. In the second different position to pivot around the common pivot axis 35, for example, by an amount of 180 °, in which then the manipulation device 33 is the tool holders 19, 20 held bending tool 4 is turned. By the rotatable or pivotable arrangement of the carrier 34 about the pivot axis 35 and the opposite and mutually averted orientation of the stopper member 32 and the manipulation device 33 can once the stopper member 32 and another time the manipulation device 33 the press bar 13, 16 and thus the bending tool 4 are turned.

The pivot axis 35 shown here for pivoting the carrier 34 between its two positions here has a vertical or vertical orientation. This can be the

Pivoting movement to be performed in a horizontal plane. Regardless, it would also be possible to choose a different orientation than the described vertical alignment. This could also be, for example, a horizontal orientation or arrangement of the pivot axis 35.

The component forming the pivot axis 35 is preferably designed as a tubular component or as a hollow shaft, which is connected to the carrier 34 at its first end region 38. The formation as a tubular component or hollow shaft can bring the advantage that In the free interior of the hollow shaft lines for the power supply or actuating means or the like can be laid. In order to achieve a stable mounting of the tubular component or the hollow shaft to form the pivot axis 35, the latter is adjustably mounted with its second end region 39 in or on the base frame 36 of the backgauge or the rear stop unit 31. As shown in simplified form with arrows, the tubular component or the hollow shaft about the pivot axis 35 rotationally and in the axial direction of the pivot axis 35 can be translationally adjusted. This can be done with unspecified drive members of the actuator 37. In order to carry out the manipulation of the bending tool 4, in particular its bending punch 5 and / or bending die 6, the manipulation device 33 may comprise at least one gripping member 40 which, depending on the design and arrangement with the bending tool 4, in particular the bending punch 5 and / or bending die. 6 in coupling s connection can be brought. In this embodiment shown here, the manipulation device 33 comprises two cooperating gripping members 40, which are mutually adjustable for the coupling s connection with the bending tool 4 in the opposite direction of movement. By this opposing displacement from one another and the associated enlargement of the outer dimension, a clamping operation can be achieved by the cooperating gripping members 40 on the bending tool 4, in particular on the bending punch 5 and / or bending die 6. One of many possibilities is to form the recesses 28, 29 described above in such a way that the two gripping members 40 can be inserted into one of the recesses 28, 29 or an opening in their release position and, after their opposite displacement, on the inside to the recess 28, 29 be created. This can be done a clamping of a bending tool 4 on the manipulation device 33 and further on the carrier 34.

Furthermore, the manipulation device 33 may also include an actuating element 41 which, for example, for the uncoupling of the bending tool 4 of the tool holder 19, 20 can be brought into operative connection with an unspecified well-known release mechanism. It is thus possible, for example, a bending tool 4 arranged on one of the tool holders 19, 20, for example a bending punch 5 and / or the bending die 6, by actuating the unlocking mechanism by the actuating element 41 from its clamping holder From the tool holder 19, 20 to solve or unlock, while at the same time while still the or the gripping organs 40 are inserted into the recess 28, 29 and coupled there by clamping. Was released with the actuator 41, the release and a sufficient clamping action or holding force of the or the gripping members 40 is achieved on the bending tool 4, with a corresponding adjustment of the actuator 37, the carrier 34 and the associated manipulation device 33 relative to the tool holder 19, 20th adjusted and thus the bending tool 4 are removed. This is preferably done in a vertical or vertical direction of movement in order to remove the bending punch 5 and / or the bending die 6. This is dependent on the clamping arrangement of the bending punch 5 and the bending die 6 on the tool holders 19, 20.

Subsequently, a displacement of the base frame 36, for example, on a guide carriage 42, on the side facing away from the operating side of the press bar 13, 16. This adjustment thus takes place in the direction of the depth of the machine frame 7. Immediately after the release or removal of the bending tool. 4 of the tool holders 19, 20 can be pivoted about the pivot axis 35 by means of the adjusting device 37 of the carrier 34 so that the manipulation device 33 is no longer the operating side and thus the tool holders 19, 20, but the tool memory 30 is turned. Then, the adjustment of the base frame 36 and associated therewith the manipulation device 33 and the bending tool 4 held thereto until the insertion of the bending tool 4, such as the punch 5 and Biegegesenks 6 takes place at a predetermined tool storage location of the tool memory 30. If this predefined position is reached, the bending tool 4 is inserted into a receptacle or holder of the tool storage 30, which, for example, the shape and design of the

Tool holder 19, 20 may correspond. If the bending tool 4 is held clamped in particular at the intended tool storage location, the one or more gripping members 40 and the coupling connected thereto can be released. Subsequently, from the tool memory 30, the subsequently required bending tool 4 can be actuated in its position with the manipulation device 33, and the previously described opposite conversion operation of the bending tool 4 from the tool store 30 to one of the tool holders 19, 20 respectively. After receiving and holding the bending tool 4 from the tool storage 30th the carrier 34 is again pivoted about the pivot axis 35 so far that the manipulation device 33 is the press bar 13, 16 facing and then the bending tool 4 is inserted at the designated position in the tool holder 19, 20 and held there by clamping.

The base frame 36 of the back stop unit 31 is guided relative to the guide carriage 42 in the direction of the depth of the machine frame 7 adjustable. The guide carriage 42 in turn can be adjusted in the transverse direction with respect to the machine frame 7, ie in the direction of the longitudinal extension of the tool holder 19, 20. Through this multiple adjustment any position can be reached and controlled within the possible travel paths.

As can now be better seen in FIG. 2, the tool memory 30 is arranged on the side of the press beams 13, 16 facing away from the operating side on a rear side of the machine frame 7. Due to the depth of the machine frame 7 with its side cheeks 9, 10 sufficient clearance or depth within the machine frame 7, starting from the tool holders 19, 20 in the direction of the depth of the machine frame 7 is achieved. The arrangement of the tool storage 30 on the back of the machine frame 7 no additional space for the arrangement of the tool storage 30 is necessary. Preferably, the tool storage 30 comprises a plurality of tool storage locations for a wide variety of bending tools 4, wherein the tool storage locations are preferably arranged one above the other in a vertical orientation and at a distance from each other.

In order to be able to use the width of the machine frame 7 for storing or storing a plurality of bending tools 4, it is advantageous if the tool memory 30 comprises a plurality of tool storage locations arranged one behind the other or next to each other. In this case, the tool storage places of a row arranged one behind the other or next to each other are preferably arranged in each case in a horizontal orientation relative to one another.

In order to be able to maintain the position and orientation of the bending punch 5 or of the bending die 6 in the tool store 30 at the tool provided therefor, the bending dies 5 can be arranged in a suspended position and the bending dies 6 in FIG a standing position at the dedicated tool storage locations to be arranged. In order to achieve this, the tool store 30 may comprise a plurality of rod-shaped storage elements 43 arranged one above the other as well as spaced apart in the vertical direction. The rod-shaped memory elements 43 may be combined with other components to form a lattice-shaped support frame 44, which is arranged or supported as a related assembly, for example, on the side walls 9, 10, in particular their inner surfaces. For this purpose, it is advantageous if the tool memory 30, in particular its support frame 44, extends in the transverse direction of the machine frame 7 between the side walls 9, 10. It is particularly advantageous if the tool memory 30 is mounted on the machine frame 7 in an adjustable manner, in particular on its side cheeks 9, 10. Preferably, the adjustment takes place in the vertical or vertical direction, so as to optionally also allow access into the interior of the machine frame 7, starting from the back to the tool holders 19, 20 and the back stop unit 31. However, this also provides access to the one or more rear stop units 31. This can be beneficial for maintenance and inspection purposes.

It has proven to be particularly advantageous if the production plant 1 comprises at least two self-displaceable or adjustable backstop units 31 each having its own carrier 34 with the stop element 32 and the manipulation device 33. Thus, an exchange of a bending tool 4 comprising a bending punch 5 and a bending die 6 can take place rapidly and almost simultaneously, since with a manipulation device 33 of the first backstop unit 31 the bending punch 5 and with the other manipulation device 33 of the further backstop unit 31 the bending die 6 out of the tool holders 19, 20 removed and can be deposited at the designated memory locations in the tool memory 30. When removing and inserting a new bending tool 4 from the tool memory 30 to the tool holders 19, 20 can then be proceeded analogously in the reverse order. It should also be mentioned that the carrier 34 can also be formed, for example, by extension or enlargement of the stop element 32 and extends as far as the support of the manipulation device 33. Thus, the carrier 34 can also simultaneously form the stop element 32. Furthermore, the end of the stop element 32 in the radial direction with respect to the pivot axis 35 protrude further than the manipulation device 33 on the other side. Thus, the mass or the weight of the bending tool 4 in the clamped holder on the manipulation device 33 with the introduction of a lower moment on the base frame 36 and the pivot axis 35 forming tubular component can be removed.

For the sake of order, it should finally be pointed out that, for a better understanding of the structure of the production s anläge 1, in particular its Hinteranschlageinheit 31, these or their components were shown partially uneven and / or enlarged and / or reduced.

The task underlying the independent inventive solutions can be taken from the description.

All statements on ranges of values in the description of the subject should be understood to include any and all sub-ranges thereof, e.g. the indication 1 to 10 should be understood to include all sub-ranges, starting from the lower limit 1 and the upper limit 10, i. all subregions begin with a lower limit of 1 or greater and end at an upper limit of 10 or less, e.g. 1 to 1.7, or 3.2 to 8.1 or 5.5 to 10.

The embodiments show possible embodiments of the manufacturing plant 1, in particular its back stop unit 31, it being noted at this point that the invention is not limited to the specifically illustrated embodiments thereof, but also various combinations of the individual embodiments are possible with each other and this variation possibility due to the doctrine of technical action by objective invention in the skill of those skilled in this technical field. So are all conceivable embodiments, which are possible by combinations of individual details of the illustrated and described embodiment variant, includes the scope of protection. Furthermore, individual features or combinations of features from the different exemplary embodiments shown and described can also represent independent, inventive or inventive solutions. Above all, the individual in Figs. 1, 2; 3 embodiments form the subject of independent solutions according to the invention. The relevant objects and solutions according to the invention can be found in the detailed descriptions of these figures.

Reference designation Production plant 26 Spindle drive

Workpiece 27 actuating means

Bending press 28 recess

Bending tool 29 recess

Bending punch 30 Tool storage

Bending die 31 Back stop unit Machine frame 32 Stop element Base plate 33 Manipulation device Sidewall 34 Carrier

Side cheek 35 pivot axis

Cross-section 36 base frame

Fronstirnfläche 37 adjusting device

Press bar 38 first end area Front end face 39 second end area Linear guide 40 Gripping element

Pressenbalken 41 actuator end face 42 guide pour end face 43 storage element tool holder 44 support frame

tool holder

Drive arrangement

drive means

energy grid

control device

input terminal

Claims

Patent claims

1. Production plant (1), in particular for the free-form bending of sheet metal to be produced workpieces (2), comprising a bending press (3), in particular press brake, with a machine frame (7) and press beams (13, 16) and on the press bar (13 , 16) arranged tool holders (19, 20), a bending tool (4) with at least one bending punch (5) and at least one bending die (6), a tool storage (30) for at least one bending tool (4) on a at least one rear stop unit (31) with a stop element (32) for positioning the sheet to be processed on the side of the press beams (13, 16) facing away from the operating side, wherein the stop element (32) is adjustable relative to the machine frame (7), and a manipulation device (33) for moving the bending tool (4) between the tool store (30) and the who The tool receiving device (33) is arranged on the rear stop unit (31), characterized in that the stop element (32) and the manipulation device (33) on a common carrier

(34) are arranged opposite one another and in mutually opposite orientation or formed and the carrier (34) of the rear stop unit (31) about a pivot axis

(35) is rotatably mounted, wherein by means of an adjusting device (37) of the carrier (34) from a first position in which the stop element (32) in the tool holders (19, 20) held bending tool (4) is facing, in a second position is pivotable, in which the manipulation device (33) facing the in the tool holders (19, 20) bending tool (4) is facing.

2. Production plant (1) according to claim 1, characterized in that the

Pivot axis (35) of the carrier (34) has a vertical orientation.

3. Production plant (1) according to claim 1 or 2, characterized in that the

Pivot axis (35) is designed as a tubular member which is connected at its first end (38) with the carrier (34).

4. Production plant (1) according to claim 3, characterized in that the

Swivel axis (35) forming tubular component with its second end portion (39) in a base frame (36) of the back stop unit (31) is adjustably mounted.

5. Production plant (1) according to one of the preceding claims, characterized in that the manipulation device (33) comprises at least one gripping member (40) which can be brought into coupling connection with the bending tool (4) in order to manipulate the bending tool (4). during the storage between the tool memory (30) and the tool holders (19, 20) on the carrier (34) to support.

6. Production plant (1) according to claim 5, characterized in that the manipulation device (33) comprises two cooperating gripping members (40), which are mutually adjustable for the coupling connection with the bending tool (4) in the opposite direction of movement.

7. Production plant (1) according to one of the preceding claims, characterized in that the manipulation device (33) further comprises an actuating element (41), which for the uncoupling of the bending tool (4) of the tool holder (19, 20) with an unlocking in Active compound can be brought.

8. Production plant (1) according to one of the preceding claims, characterized in that the tool storage (30) is disposed on the side facing away from the operating side of the press beams (13, 16) on a rear side of the machine frame (7).

9. Production plant (1) according to one of the preceding claims, characterized in that the tool storage (30) comprises a plurality of tool storage locations and these are arranged one above the other in a vertical orientation and at a distance from each other.

10. Production plant (1) according to one of the preceding claims, characterized in that the tool store (30) further comprises a plurality of tool storage locations arranged one behind the other in a row.

11. Production plant (1) according to one of the preceding claims, characterized in that the tool storage (30) comprises a plurality of superimposed and spaced apart in the vertical direction from each other, in particular rod-shaped formed memory elements (43).

12. Production plant (1) according to claim 11, characterized in that the tool storage (30) with the storage elements (43) forms a grid-shaped support frame (44).

13. Production plant (1) according to one of the preceding claims, characterized in that extending the tool storage (30) in the transverse direction of the machine frame (7) between its side wall parts (9, 10).

14. Production plant (1) according to one of the preceding claims, character- ized in that the tool storage (30) on the machine frame (7), in particular on its side wall parts (9, 10), is adjustably guided out.