EP3074152B1 - Tool set-up system for a brake press - Google Patents

Description

The invention relates to a production line with a bending press, as specified in claim 1.

Several different devices are known from the prior art, which allow the automatic setup of bending tools on a bending press. In most cases, a manipulation robot or the backgauge unit is used to set up the bending tools on the bending machine. In this case, the bending tool is removed by means of the manipulation robot or the Hinteranschlageinheit from the tool storage and positioned depending on the tool receiving system in the tool holder. One possibility here is that the bending tool is inserted along the longitudinal alignment of the tool holder in this and is thus positioned. Another possibility is that the bending tool is used by the manipulation robot or the Hinteranschlageinheit directly at its end position in a direction perpendicular to the longitudinal direction, in which case a locking mechanism for inserting the tool must be present in the bending tool.

These embodiments have the disadvantage that the manipulation robot or the back-stop unit must have a large working range in order to be able to position the bending tools along the entire longitudinal extension of the tool holder. As a result, the manipulation robot or the back-stop unit become very complex and very heavy. Furthermore, the bending tools can only be removed individually from the tool storage and used in the tool holder, which requires a lot of time.

Furthermore, devices are known in which a bending tool is used by a manipulation device in the tool storage and is then positioned by means of a spindle drive or by means of a rack in the longitudinal direction of the tool storage.

These embodiments have the disadvantage that a spindle drive, or a rack are expensive to produce and are therefore expensive to buy. Furthermore, separate receiving constructions for receiving the bending tools must be used for such a drive method, whereby the complexity of the manufacturing system increases again.

From the JP S57 31422 A and the EP 0 894 550 A are known by means of a traction means in the tool holder sliding bending tools.

The present invention has for its object to provide a manufacturing plant for the free bending of sheet metal to be produced workpieces, which has an improved device for tooling.

This object of the invention is achieved by the measures according to claim 1.

According to the invention, a production plant, in particular for the free bending of workpieces to be produced from sheet metal, is formed. The production line comprises a bending press, in particular a press brake, with a machine frame and press beam and slit-like tool receivers arranged on the press beams, bending tools in the form of a bending punch or a bending die, a tool store for at least one bending tool, a first manipulation device for transferring the bending tool between the tool storage and the tool holders, and a second manipulation device for positioning the bending tool in a longitudinal alignment of the tool holder, wherein the second manipulation device comprises a traction means guided over at least two deflecting means, on which traction means at least one driver element is arranged. The bending tool has in a direction parallel to a bending edge at least one extending over the length of the bending tool slot for carrying the at least one traction means, wherein the at least one slot further dimensioned so that the at least one driver element is not feasible through the slot.

An advantage of the embodiment of the invention is that such a configured, second manipulation device for positioning the bending tools, a few simple can consist of built-up parts. As a result, the manipulation device not only as robust as possible and still in lightweight, but can also be produced inexpensively. Furthermore, such a manipulation device constructed in this way is not very maintenance-intensive. In addition, due to the simple construction, an excessive susceptibility to error of the manipulation device can be obstructed. Advantageously, the expression, according to which the traction means is guided in a slot of the bending tool, since thus the traction means can be protected from environmental influences, whereby damage to the traction means can be obstructed. Furthermore, the combination of a manipulation device for inserting the bending tools with a manipulation device for positioning the bending tools is very advantageous since this can greatly reduce set-up times.

Furthermore, it can be provided that the at least one traction means is designed as a rope. It is advantageous in this case that a traction means, which e.g. is designed in the form of a steel cable, is particularly robust and resistant. Furthermore, a trained in the form of a rope traction means is very wear and can absorb high forces at relatively low dimensions. Another advantage is that a rope can be easily deflected, and a pulley does not have to have complicated geometry.

Furthermore, it may be expedient if the at least one driver element engages around the traction means and has an essentially rotationally symmetrical basic shape. It is advantageous here that a driver element with substantially rotationally symmetrical basic shape does not have to be mounted in a specific angular position on the traction means. Furthermore, in a driver element with rotationally symmetrical basic shape, a rotation of the traction means during operation has no negative influence on the functionality of the manipulation device. This is particularly advantageous when using a rope as traction means, since a rope against rotation about its longitudinal axis is not very stable. This is especially the case with an endless rope guided around two deflection means. Such a driver element, which surrounds the traction means, can be arranged centrally on the traction means on the one hand. Furthermore, such a mating element can be equipped with a simple fastening system, so that it can be easily attached to the traction means.

Furthermore, it can be provided that the working area of the at least one traction means extends substantially over the entire length of the tool holder. The advantage here is that thus the bending tools positioned on the total length of the tool holder can be. Here it is quite possible that the working area on the side of the machine to which the tool storage is connected, is somewhat shortened.

Furthermore, it may be expedient if the second manipulation device is positioned so that at least one section of the at least one traction means is arranged to extend within the clear cross section of the slot-like tool holder, so that it can be brought into engagement with the bending tool. The advantage here is that thereby the traction means is well protected from environmental influences. Furthermore, it can be achieved that the space requirement of the second manipulation device can be kept low. This results from the fact that the essential components of the second manipulation device can be arranged within the tool holder. Thus, the number of protruding from the tool holder parts is minimized.

Furthermore, it may be advantageous for the bending tools to be equipped with a first traction means, by means of which the bending tools can be positioned in a first direction of the longitudinal alignment of the tool holder, and that a second traction means is provided, through which the bending tools are opposed in a direction opposite to the first direction second direction can be positioned. As a result, the individual bending tools can be easily and quickly positioned. This is achieved by the fact that each attached to a traction means driver element can be positioned on one side of the bending press, in particular the tool holder. Thus, the bending tools can be selectively moved in the first direction, or in the second direction, without a driver element must be moved to the second side of the bending tools. Furthermore, it can be achieved that the bending tools can be brought together, for example, to be able to reduce gaps between the individual bending tools.

In a special embodiment, it can be provided that the second manipulation device comprises at least two cable drums connected to a drive unit, between which the at least one cable-shaped traction means is tensioned, and to which cable drums the at least one cable-shaped traction means can be wound alternately. The advantage here is that no endless traction means is required by the use of two driven cable drums on which the rope-shaped traction means is wound alternately.

Thus, the required space can be kept as low as possible. Furthermore, therefore, no clamping device is necessary in which an endless circulating rope must be stretched.
Alternatively, it may be provided that the second manipulation device comprises at least one drive unit which is coupled in motion with a deflection means, by means of which drive unit, the traction means is movable and positionable, wherein the traction means is designed as a circulating Endloszugmittel. It is advantageous that, in contrast to the version with alternate winding of the traction means on two cable drums, only one driven deflection unit is needed. Thus, such a manipulation device constructed in such a way can be made substantially less expensive than a manipulation device with two driven deflecting means.
In a further development it can be provided that the deflection unit is designed as a deflection roller. The design of the deflection unit as a deflection roller has the advantage that a deflection roller can be easily manufactured. As a result, this is less error-prone and inexpensive to manufacture. Furthermore, a pulley is very wear, which also maintenance costs can be kept low. According to the invention, it is provided that at least one deflecting means is displaceable transversely to the longitudinal orientation of the tool holder, whereby the driving element fastened to a section of the traction means can be brought into engagement with the bending tool. The advantage here is that can be achieved by this measure that the traction element mounted on the traction element, which is usually in engagement with the bending tool so that the bending tool can be moved by the traction means, so far can be moved in the vertical direction that it no longer in operative engagement with the bending tool. Thereby, the driver element can be positioned on the opposite side of the bending tool or the bending tools, whereby the bending tools can be moved with only one driver element either in the first direction or in the second direction along the longitudinal direction of the tool holder.
According to a further development, it can be provided that between the deflection means a displaceable transversely to the longitudinal alignment of the tool holder and on the subsection acting guide element is formed, whereby the driving element attached to the portion of the traction means can be brought into engagement with the bending tool. The advantage here is that by such a measure, the deflection must not be moved transversely to the longitudinal direction of the tool holder, since the traction means or the driver element can be brought by the guide member with a bending tool in operative engagement.

Furthermore, it may be advantageous that at least one deflecting means is looped around several times by the traction means. This may be necessary in that deflection, which serves as a drive for the traction means. Especially when high forces are to be absorbed on a traction device, which is designed as a cable, multiple wrapping can be advantageous in order to be able to apply sufficient frictional force.

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

Fig. 1

eine Vorderansicht einer Fertigungsanlage mit einer Biegepresse;

Fig. 2

eine Vorderansicht, sowie einer zugehörigen Draufsicht einer Biegepresse mit zwei Manipulationsvorrichtungen;

Fig. 3

eine perspektivische Ansicht eines als Seil ausgebildetes Zugmittel mit einem Mitnehmerelement;

Fig. 4

eine perspektivische Ansicht eines als Zahnriemen ausgebildetes Zugmittel mit einem Mitnehmerelement;

Fig. 5

eine perspektivische Ansicht eines als Kette ausgebildetes Zugmittel mit einem Mitnehmerelement;

Fig. 6

ein Biegewerkzeug mit Schlitz und ein drin durchgeführtes Zugmittel mit Mitnehmerelement;

Fig. 7

ein Schnitt durch ein Biegewerkzeug, im speziellen durch den Werkzeugklemmabschnitt und ein drin durchgeführtes Zugmittel mit Mitnehmerelement;

Fig. 8

eine Vorderansicht, sowie einer zugehörigen Draufsicht einer Biegepresse mit zwei Manipulationsvorrichtungen, wobei eine zweite Manipulationsvorrichtung bis in den Werkzeugspeicher verlängert ist;

Fig. 9

eine Werkzeugsammelvorrichtung mit darin aufgenommenen Biegewerkzeugen;

Fig. 10

eine schematische Darstellung einer weiteren Ausführungsmöglichkeit von Umlenkmitteln der zweiten Manipulationsvorrichtung, in Form von Spindeln;

Fig. 11

eine schematische Darstellung einer weiteren Ausführungsmöglichkeit von Umlenkmitteln der zweiten Manipulationsvorrichtung, in Form von Seiltrommeln;

Fig. 12

eine schematische Darstellung einer weiteren Ausführungsmöglichkeit der zweiten Manipulationsvorrichtung mit einem Führungselement.

In each case, in a highly simplified, schematic representation:

Fig. 1

a front view of a production line with a bending press;

Fig. 2

a front view, and an associated plan view of a bending press with two manipulation devices;

Fig. 3

a perspective view of a trained as a rope traction means with a driver element;

Fig. 4

a perspective view of a trained as a toothed belt traction means with a driver element;

Fig. 5

a perspective view of a trained as a chain traction means with a driver element;

Fig. 6

a bending tool with slot and a traction means carried out in it with driving element;

Fig. 7

a section through a bending tool, in particular by the tool clamping portion and a traction means carried out with entrainment element;

Fig. 8

a front view, and an associated plan view of a bending press with two manipulation devices, wherein a second manipulation device is extended into the tool storage;

Fig. 9

a tool-collecting device with bending tools received therein;

Fig. 10

a schematic representation of another embodiment of deflection means of the second manipulation device, in the form of spindles;

Fig. 11

a schematic representation of another embodiment of deflection means of the second manipulation device, in the form of cable drums;

Fig. 12

a schematic representation of another possible embodiment of the second manipulation device with a guide element.

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 names, 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 these position information in a change in position mutatis mutandis to transfer to the new location.

In the Fig. 1 to 12 is a manufacturing plant 1 for the free bending of sheet metal to be produced workpieces 2, as well as embodiments of these shown in a simplified schematic representation.

The production plant 1 comprises a bending press 3, in particular a press brake, for producing the workpieces 2 or workpieces between relatively adjustable bending tools 4, such as bending punch 5 and bending die 6. The bending punch 5 can also be referred to as an upper tool and the bending die 6 as a lower tool become.

A machine frame 7 of the bending press 3 comprises, for example, a base plate 8, on which vertically upwardly spaced, spaced apart in the transverse direction and parallel to each other side cheeks 9, 10 may be 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 may be formed 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 may be 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 legs of front end faces 14 which are remote from the base plate 8, in linear guides 15 a press beam 13 forming a table beam can be mounted in a manner that can be displaced relative to a further adjustable pressing beam 16, in particular a pressure beam. On opposite, mutually parallel end faces 17, 18 of the two pressing bars 13, 16 can be 19 arranged and equipped for mounting with the bending tools 4 tool holders 19, 20.

The bending press 3 shown has as drive arrangement 21 for the adjustable pressing 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 can be connected to a control device 24 line connected. 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 are well known, of which adjusting means 27 for a reversible actuating movement of the upper beam formed by the pressure bar 16 with this, for example, are drive-connected. Regardless, it would also be possible, the drive or the 22 to form by 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.

All of the above-mentioned execution features or individual features of the description of the figures are mentioned in order to describe an exemplary production plant 1 or bending press 3, to which reference may be made in the following part of the description of the figures. All described individual features are therefore not absolutely necessary for the inventive design and can be omitted, or replaced by other features to obtain a functional bending press 3.

Further details required for the operation of such a bending press 3, such as safety devices, stop arrangements, control and measuring devices, are omitted from the description to avoid an 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 is automated by means of a first manipulation device 30 of a in the Fig. 2 taken simplistically shown tool memory 31 and automatically to an insertion position 32 of the tool holders 19, 20 of the pressing bars 13, 16 spent and used there and clamped is supported. It can also be spoken of a tool change system, with which the exchange operations can be performed with the necessary system parts.

This first manipulation device 30 can be designed in the form of a manipulator which is used, for example, for workpiece handling. Furthermore, it is possible that the manipulation device 30 is formed, for example, by a back stop unit, which is designed to also take over manipulation activities. In addition to these and other possible embodiments, it is also possible that a manipulator designed especially for the purpose of handling bending tools is used as manipulation device 30.

The in the Fig. 2 to 12 described embodiment of an apparatus for equipping bending tools is explained and illustrated for use on a lower tool holder 19. Analogous to the description made here, an upper tool holder 20 can also be equipped with bending tools 4 in the same way. For the sake of brevity, however, a detailed description or a graphic illustration of such an upper tool holder 20 will be dispensed with.

Fig. 2 shows a schematic representation of the front view of a bending press 3, in particular the first press bar 13 and the first tool holder 19. It is clearly evident that in addition to a first manipulation device 30 in the manufacturing plant 1, a second manipulation device 33 is arranged, which is designed to to spend the bending tools 4 from the insertion position 32 to their final position along the longitudinal alignment 34 in the tool holder 19.

For this purpose, the manipulation device 33 comprises at least one traction means 37 guided over two deflection means 35, 36, on which at least one entrainment element 38 is arranged.

For a better understanding of the structure of such a manipulation device 33 show the Fig. 3 to 5 various design options for traction means 37 and for driving elements 38th

As in Fig. 3 illustrated, the traction means 37 may be performed, for example, as a cable 39. Such a cable 39 can be made in the form of a common steel cable or plastic rope. The diameter 40 of the cable 39 is dependent on the applied tensile force and is preferably between 1 mm and 5 mm.

Furthermore, it is also possible that the traction means 37, such as in Fig. 4 shown, designed as a toothed belt or as a V-belt or flat belt.

In yet another variant, it is possible that the traction means 37, as in Fig. 5 represented as a chain is executed.

However, the various design options of such a traction means 37 are not limited to the examples. It is also conceivable that further, not shown, traction means forms are used as traction means 37 in the manipulation device 33.

Like the traction means 37 and the driver element 38 can be designed in various embodiments, wherein the in FIG. 3 to FIG. 5 illustrated embodiments show a small section of the possible design options.

This in Fig. 3 Carrier element 38 shown by way of example can be embodied, for example, as a cylindrical element which is fastened to the traction means 37. This designed as a cylindrical element driver element 38 has a larger diameter 41 than the rope diameter 40. For attachment of the driver element 38 on the traction means 37 several different types of fastening can be provided. For example, it is conceivable that the driver element 38 has a parting plane 42 extending through the center axis of the cylindrical element, through which the driver element 38 is divided into two halves. As a result, the driver element 38 can be easily attached to the traction means 37 and fastened by means of fastening means 43. Furthermore, it is also conceivable that the two halves of the driver element 38 formed by the separating plane 42 are fastened to one another or fastened to the traction means 37, for example by a material connection such as an adhesive connection, solder connection or welded connection.

As in Fig. 4 illustrated, the driver element 38 may also be formed as a flat product, which by means of a fastening means 43 on the traction means 37, such as a toothed belt, may be attached. It can be provided that the driver element 38 is screwed either directly to the traction means 37, or that, for example, a counter-holder element is performed, by means of which the driver element 38 is screwed and thus the traction means 37 is clamped.

As in Fig. 5 illustrated, it is also possible that the driver element 38 is attached directly to the traction means 37 and is designed as a simple projecting tab. Furthermore, it is also conceivable that the driver element 38 is formed for example as a chain link and thus part of in Fig. 5 shown chain is. The embodiments or attachment shapes of the driver element 38 on the traction means 37 are not by the embodiments in FIG. 3 to FIG. 5 limited, but rather it is conceivable that other types of driver elements 38 and fastener 43 are used.

The just described embodiments of various traction means 37 and driver elements 38 can in the in Fig. 2 shown manipulation device 33 are used.

After this insertion for the possible embodiment of different traction means 37 and driver elements 38 are based on the Fig. 2 the possibilities for the design of the manipulation device 33 further described.

One possible embodiment is that, as in Fig. 2 illustrated, the traction means 37 via two deflection means 35, 36 is guided, wherein the deflection means 35, 36 are formed as deflection rollers 44 and the traction means 37 is formed as a continuous Endloszugmittel. It can be provided that one of the deflection means 35, 36 is coupled in motion with a drive 45, so that the traction means 37 moves circumferentially around the two deflection means 35, 36 and thus the traction element 38 coupled to the traction means 37 along the longitudinal orientation 34 of the tool holder 19 can be.

In order to be able to position or move bending tools 4 with a manipulation device 33 designed in this way, as in FIG Fig. 6 and Fig. 7 illustrated in detail, provided that in the bending tool 4, a slot 46 is formed, which is arranged along a direction parallel to a bending edge 47 direction 48. Such a slot 46 preferably extends over the entire length 49 of the bending tool 4.

In order to move or position the bending tool 4 in the longitudinal direction 34 of the tool holder 19, it can be provided that the traction means 37 extends within the slot 46 of the bending tool 4. The traction means 37 can now be displaced so far in a direction 48 parallel to the bending edge 47 until a driver element 38, the bending tool 4 contacted and thereby the bending tool 4 can be moved by the driver 38 in the longitudinal direction 34 in the tool holder 19.

The bending tool 4 can in this case, as in an advantageous, in Fig. 6 shown, variant be executed. The slot 46, which is provided in the bending tool 4, preferably has a width 50, which is chosen so large that the traction means 37 can be guided without contact through the slot 46. The width 50 of the slot 46 is chosen so large that the driver element 38 is not feasible through the slot 46 and thus can strike the bending tool and can put the bending tool 4 in motion.

The slot 46 is preferably arranged in the bending tool 4 so that it is located within the tool clamping portion 51 of the bending tool 4. The tool clamping portion 51 is that part of the bending tool 4, which is adapted to receive the bending tool 4 in one of the tool holders 19, 20 and to be able to clamp.

The manipulation device 33 is preferably positioned such that at least one subsection 52 of the at least one traction means 37 is arranged within the clear cross section 53 of the slot-like tool holder 19, 20. In the clear cross section 53 of the tool holder 19, 20, the bending tool 4, in particular the tool clamping portion 51 of the bending tool 4 is fixed and clamped.

The tool clamping portion 51 is hereby completely received in the clear cross section 53. In order for a bending tool assembly as in Fig. 6 is shown to ensure the functionality of the manipulation device 33, the clear cross section 53 should preferably be performed with such a large depth 54 that remains below the tool clamping portion 51 of the bending tool 4 still a free space in which the traction means 37 are passed together with the driver element 38 may, It can thereby be achieved that the driver element 38 from one side of the bending edge to the 47th parallel direction 48 Biegewerkzeuges 4 can be positioned on the opposite side of the bending edge 47 parallel to the direction 48 of the bending tool 4. Thus, the bending tool 4 can be selectively displaced in a first or a second direction.

As in Fig. 7 can be further provided that in the bending tool 4, a recess 55 and two opposing recesses 55 are provided, which are arranged in the tool clamping portion 51 of the bending tool 4 so that the driver element 38 can be received in such a recess. The recess 55 is arranged so that in the tool clamping portion 51, the length 49 of the bending tool 4 is shortened by the recess 55. The recess 55 thus represents a depression which excludes the bending tool 4 in a direction 48 parallel to the bending edge 47.

Through this in Fig. 7 illustrated embodiment of the bending tool 4 can be achieved, that the driver element 38 can also be introduced between tightly juxtaposed bending tools 4.

Based Fig. 2 Now, the function of the manipulation device 33 can be described as follows.

To set up the bending press 3, a bending tool 4 is removed from the tool storage 31 by a first manipulation device 30 and positioned in the insertion position 32 of the tool holder 19. Preferably, the driver element 38 is arranged as close as possible to the second deflection means 36 during this process, so that it is located to the right of the insertion position 32.

Now, if the bending tool 4 has been moved by the first manipulation device 30 in its insertion position 32 and positioned there, the second manipulation device 33, in particular the traction means 37 are set by the drive 45 in motion so that the driver element 38 in the direction of the first Deflection means 35, and thus in the direction of insertion position 32 is moved. The traction means 37 in this case extends within the slot 46 of the bending tool 4 and can be moved freely until the driver element 38 with the bending tool 4, in particular its tool clamping section 51, comes in contact. Now, due to the tensile force on the traction means 37, which is transmitted to the driver element 38, the bending tool 4 is set in motion. The bending tool 4 is now moved as far along the longitudinal direction 34 in the tool holder 19 until it has reached its predetermined position.

In order to be able to use another bending tool 4 in the tool holder 19, the driver element 38 must be moved by means of the traction means 37 again in the direction of the second deflection means 36 that it is positioned as close as possible to this, another bending tool 4 in the insertion position 32 of the tool holder 19 to use. Now, the operation of positioning the bending tool 4 is repeated in the above-described steps.

In order to re-equip the bending press 3 after successful bending process, a possibility must be provided to remove the bending tools 4 again from the tool holder 19. For this purpose, several different variants are conceivable and illustrated.

On the one hand, it can be provided that, as in Fig. 2 illustrated, at least one of the two deflection means 35, 36 transversely to the longitudinal direction 34 of the tool holder 19 is displaceable. Preferably, in this case one or both deflection means 35, 36 is displaceable in a vertical direction, so that the driver element 38 can be brought down from the engagement region of the bending tool 4, so that the driver element 38, as in Fig. 6 described, can be moved freely under the bending tool 4 through.

Thus, the traction means 37, together with the driver element 38 below the tool clamping portion 51 of the bending tool 4, can be brought freely running in the direction of the first deflection means 35. After this step, the deflection means 35, 36 can be moved upward, so that the driver element 38 is brought back into engagement with the bending tool 4. As a result, the bending tools 4 can be displaced by the traction means 37 or the entrainment element 38 in the direction of the second deflection means 36 and thus into the insertion position 32, from where they can be removed with the first manipulation device 30.

By the in Fig. 7 shown recesses 55 in the bending tool 4 can be achieved that not necessarily all used in the tool holder 19 bending tools 4 are moved simultaneously in the direction of the second deflection means 36, but can also be provided that the driver element 38 is positioned between individual bending tools 4 and thus only individual bending tools 4 are displaced in the direction of the second deflection means 36.

For vertical positioning of one or both deflection means 35, 36 it can be provided that these are arranged on a vertically extending guide rail 56. In this case, for example, an electromotive, a hydraulic or a pneumatic adjusting drive 57 can be used as drive means.

In the Fig. 2 illustrated second manipulation device 33 preferably extends approximately over a total length 58 of the tool holder 19. Thus, the working range of such a manipulation device 33 can be made as large as possible, so that the bending tools 4 can be positioned as possible at any position in the tool holder 19. For this purpose, it may be necessary for the two deflection means 35, 36 to be positioned partially outside the tool holder 19 in order to make the working area of the manipulation device 33 as large as possible. Alternatively, it can be provided that, for example, the second deflection means 36 is arranged so that it does not protrude laterally of the tool holder 19 so as not to hinder a tool store 31 arranged next to the bending press 3.

In the Fig. 8 is a further and possibly independent embodiment of the manufacturing plant 1 is shown, again for like parts, the same reference numerals or component names as in the preceding Fig. 1 to 7 be used. In order to avoid unnecessary repetition, the detailed description in the previous ones will be used Fig. 1 to 7 referred or referred.

The in the Fig. 8 illustrated embodiment of the manufacturing plant 1 is in principle similar to the embodiment as in Fig. 2 was presented. Different from the one in Fig. 2 illustrated embodiment, in this case the manipulation device 33 is executed over a larger width. In this case, the manipulation device 33 extends over such a large width that the working area of the manipulation device 33 also extends beyond the tool store 31 arranged next to the bending press 3. It can be provided that in the tool memory 31, a tool collecting device 59 is mounted, in which a plurality of bending tools 4 can be inserted simultaneously. This tool collecting device 59 can finally be moved to a storage area of the tool storage 31. Thus, individual bending tools 4 can be prepared together in such a tool collecting device 59.

Advantageous in the Fig. 8 shown variant with an elongated manipulation device 33 is not by the first manipulation device 30, as in the embodiment in Fig. 2 shown, each bending tool 4 has to be moved individually into the insertion position 32, but that a plurality of pre-equipped in the tool collecting device 59 bending tools 4 can be moved simultaneously into the tool holder 19, 20.

Through these measures, time can be saved during the set-up process, since by means of the tool collecting device 59 a plurality of bending tools 4 are simultaneously removed or transported. For example, it may be provided that the tool-collecting device 59 is pre-loaded with bending tools 4 and the tool-collecting device 59, together with the bending tools 4 received therein, is subsequently positioned next to the tool holder 19 at its predetermined position for tooling. Subsequently, all in the tool collecting device 59 positioned bending tools 4 can be moved simultaneously into the tool holder 19.

In order to equip the next bending tools 4 in the bending press 3, a new tool collecting device 59 with already pre-equipped bending tools 4 next to the tool holder 19 can be positioned by means of the first manipulation device 30. According to the above steps, the bending tools 4 can now be moved into the tool holder 19 by means of the second manipulation device 33.

A tool collecting device 59 as shown in FIG Fig. 9 is shown, must be carried out so that it is open at the bottom, in order to lift the tool-collecting device 59 together with the bending tools 4 received therein upwards. By the traction means 37, a tool-collecting device 59, which is designed to be closed at the bottom, could not be raised.

In the embodiment of Fig. 9 are two traction means 37, 60 shown, which are parallel to each other, and their operation will be explained in more detail below.

In the embodiment, which in Fig. 8 is shown, a second traction means 60 is further shown in dashed design, to which a second driver element 61 is arranged. Such an embodiment makes it possible to achieve that the bending tools 4 can be displaced in a first direction 62 by means of the first traction means 37 and can be displaced in a second direction 63 by means of the second traction means 60. It can be provided that the two driver elements 38, 61 can each be arranged on one side of the longitudinal alignment 34 on the bending tools 4. This embodiment makes it possible that none of the driver elements 38, 61 in the longitudinal direction 34 must be moved to the opposite side of the bending tools 4. As a result, the guide rail 56 or the adjusting drive 57 described in an alternative variant can also be omitted.

Fig. 10 shows a schematic representation in which the deflection means 35, 36 are designed as a multi-wound spindle. This represents a further embodiment variant for the embodiment of the deflection means 35, 36, and can be used in combination with the embodiment variants described above.

Fig. 11 shows a schematic diagram of a further embodiment in which the deflection means 35, 36 are formed as cable drums 64. Here, the traction means 37 is alternately wound on one of the cable drums 64, whereby the driver element 38 can be moved along the longitudinal alignment 34 in the tool holder 19. The two cable drums 64 must be coordinated with each other in their rotational speed.

Fig. 12 shows a schematic representation of a further embodiment variant of the manipulation device 33 in which a guide element 65 is provided which can lift the traction means 37 and thus can bring the traction element 37 attached to the traction element 38 with a bending tool 4 into engagement. This can be achieved that the two deflection means 35, 36 need not be adjusted with respect to their horizontal position. Only the horizontal distance of the two deflection means 35, 36 must be adapted to the adjustment of the traction means 37. Such a guide element 65 can be formed, for example, as a guide rail, which can be raised in the vertical direction to bring the driver element 38 with the bending tool 4 in engagement. Alternatively, it can be provided that the guide element 65 is formed approximately by two deflection rollers, which can lift the traction means.
In the Characters. 2 to 12 different and possibly independent embodiments of the manufacturing plant 1 are shown, wherein the same reference numerals or component names are used as in the preceding figures for the same parts. In order to avoid unnecessary repetition, reference is made to the detailed description in the respective preceding figures.

All information on ranges of values in objective description should be understood to include these arbitrary and all sub-ranges thereof, eg the indication 1 to 10 should be understood to encompass all sub-ranges, starting from the lower limit 1 and the upper limit 10 , ie all sections begin with a lower one Limit of 1 or greater and end at an upper limit of 10 or less, eg 1 to 1.7, or 3.2 to 8.1, or 5.5 to 10.

For the sake of order, it should finally be pointed out that in order to better understand the construction of the production plant 1, these or their components have been shown partly unevenly and / or enlarged and / or reduced in size. <B> Reference Numbers </ b> 1 manufacturing plant 31 tool storage 2 workpiece 32 insertion 3 bending press 33 second manipulation device 4 bending tool 34 longitudinal alignment 5 punch 35 first deflecting means 6 bending die 36 second deflecting means 7 machine frame 37 first traction means 8th baseplate 38 dogging 9 side cheek 39 rope 10 side cheek 40 Rope diameter 11 cross-dressing 41 diameter 12 Front face 42 parting plane 13 first press beam 43 fastener 14 Front face 44 idler pulley 15 linear guide 45 drive 16 second pressing beam 46 slot 17 face 47 bending edge 18 face 48 parallel direction 19 first tool holder 49 length 20 second tool holder 50 width 21 drive arrangement 51 Tool clamping section 22 drive means 52 part Of 23 energy grid 53 cross-section 24 control device 54 depth 25 input terminal 55 recess 26 spindle drive 56 guide rail 27 actuating means 57 adjustment 28 recess 58 overall length 29 recess 59 Tool collection device 30 first manipulation device 60 second traction means 61 second driver element 62 first direction 63 second direction 64 cable drum 65 guide element

Claims (11)

1. Production plant (1), in particular for air bending workpieces to be produced from sheet metal (2), comprising a bending press (3), in particular a press brake, comprising a machine frame (7) and press beams (13, 16) as well as slot-shaped tool holders (19, 20) disposed and/or constructed on the press beams (13, 16), bending tools (4) in the form of a bending punch (5) or a bending die (6), a tool magazine (31) for at least one bending tool (4), a first manipulation device (30) for transporting the bending tool (4) between the tool magazine (31) and the tool holders (19, 20), and a second manipulation device (33) for positioning the bending tool (4) in a lengthways direction (34) of the tool holder (19,20), the second manipulation device (33) comprising at least one traction means (37) guided via two deflection means (35, 36), on which traction means (37) at least one pusher element (38) is provided, the bending tool (4) having at least one slot (46) extending across the length (49) of the bending tool (4) in a direction (48) parallel with a bending edge (47) through which the at least one traction means (37) is run, and the at least one slot (46) being further dimensioned such that the at least one pusher element (38) cannot be run through the slot (46), characterized in that at least one deflection means (35, 36) can be displaced transversely to the lengthways direction (34) of the tool holder (19, 20), as a result of which the pusher element (38) secured to a partial portion (52) of the traction means (37) can be moved into engagement with the bending tool (4).
2. Production plant according to claim 1, characterized in that the at least one traction means (37) is provided in the form of a cable (39).
3. Production plant according to claim 1 or 2, characterized in that the at least one pusher element (38) extends around the traction means (37) and is of a substantially rotationally symmetrical shape.
4. Production plant according to one of the preceding claims, characterized in that the working range of the at least one traction means (37) extends substantially across the total length (58) of the tool holder (19, 20).
5. Production plant according to one of the preceding claims, characterized in that the second manipulation device (33) is positioned such that at least a partial portion (52) of the at least one traction means (37) extends inside the clear cross-section (53) of the slot-shaped tool holder (19, 20) so that it can be moved into engagement with the bending tool (4).
6. Production plant according to one of the preceding claims, characterized in that a first traction means (37) is provided for setting up the bending tools (4), by means of which the bending tools (4) can be positioned in a first direction (62) of the lengthways direction (34) of the tool holder (19, 20), and in that a second traction means (60) is provided, by means of which the bending tools (4) can be positioned in a second direction (63) opposite the first direction (62).
7. Production plant according to one of the preceding claims, characterized in that the second manipulation device (33) comprises at least two cable drums (64) connected to a drive unit (45), between which the at least one cable-shaped traction means (37) is tensioned and on which cable drums (64) the at least one cable-shaped traction means (37) can be alternately reeled.
8. Production plant according to one of claims 1 to 6, characterized in that the second manipulation device (33) comprises at least one drive unit (45) which is coupled in a driving arrangement with a deflection means (35, 36), by means of which drive unit (45) the traction means (37) can be moved and positioned, wherein the traction means (37) is provided in the form of a circulating endless traction means (37).
9. Production plant according to claim 8, characterized in that at least one deflection means (35, 36) is provided in the form of a pulley (44).
10. Production plant according to one of the preceding claims, characterized in that a guide element (65) is constructed between the deflection means (35, 36) which can be displaced transversely to the lengthways direction (34) of the tool holder (19, 20) and which acts on the partial portion (52), as a result of which the pusher element (38) secured to the partial portion (52) of the traction means (37) can be moved into engagement with the bending tool (4).
11. Production plant according to one of the preceding claims, characterized in that the traction means (37) is reeled multiple times around at least one deflection means (35, 36).

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