EP3154722A1

EP3154722A1 - Bending press having bending unit, and reshaping method

Info

Publication number: EP3154722A1
Application number: EP15733602.5A
Authority: EP
Inventors: Wolfgang Aigner; Stefano Speziali; Thomas Weiss
Original assignee: Trumpf Maschinen Austria GmbH and Co KG
Current assignee: Trumpf Maschinen Austria GmbH and Co KG
Priority date: 2014-06-10
Filing date: 2015-05-21
Publication date: 2017-04-19
Anticipated expiration: 2035-05-21
Also published as: CN106660095B; CN106660095A; TR201809784T4; EP3154722B1; US10464115B2; ES2676582T3; WO2015188208A1; US20170189951A1; AT515280A4; AT515280B1

Abstract

The invention relates to a bending press (3) and to a method for bending sheet metal in relation to a work piece (2). The bending press (3) comprises a machine frame (7) on which lower and upper clamping jaws (5, 6) are arranged, having first and second reshaping edges. A bending tool (41) having a bending edge (42) is arranged on a bending bar (43). The bending tool (41) is mounted about a swivel axis (46) such that same can swivel. The swivel axis (46) can be moved into both a position above and a position below a work piece contact plane (40). In a position above the work piece contact plane (40), the bending edge (42) is oriented downwards in the direction of a first reshaping edge, and in a position below the work piece contact plane (40), said bending edge is oriented upwards in the direction of the second reshaping edge. The invention also relates to a method for reshaping, in particular bending, sheet metal in relation to a work piece (2).

Description

Bending press with bending unit and method for forming

The invention relates to a bending press and a method for forming, in particular bending, a sheet to a workpiece, as described in claims 1 and 11.

EP 0 679 456 A1 discloses a bending press with a bending unit for folding a sheet into a workpiece, in which the bending tool is connected to an angle measuring device for determining its relative position with respect to the bending beam. The bending press comprises a stationary machine frame, a lower clamping bar with at least one lower clamping jaw held thereon, which has at least one clamping jaw a first forming edge, and an upper clamping bar. At least one upper clamping jaw is held on the upper clamping bar, which has at least one clamping jaw a second forming edge. The upper clamping bar is adjustable relative to the machine frame relative to a clamping bar guide by means of a drive arrangement, in order to be able to clamp the workpiece to be produced between the two clamping jaws. The at least one lower jaw has a lower clamping surface on its end region facing the upper clamping jaw. The at least one upper jaw has an upper clamping surface on its end region facing the lower clamping jaw, wherein the two clamping surfaces define a workpiece support plane for the workpiece to be produced when the position adjoins one another.

The bending unit comprises bending tools which have a bending edge. Furthermore, the bending tools are arranged on a bending beam, wherein the bending beam is adjustable relative to the machine frame on bending beam guides designed as linear guides by means of a bending beam drive. The bending tools are pivotable about a parallel with respect to one of the forming edges aligned pivot axis. The bending beam has a C-shaped cross section, wherein the bending tool is pivotably arranged on each of the two limbs on the two sides. For both Abkantrichtungen so a separate bending tool is necessary. Further about a pivot axis mounted on a machine frame bending beam with bending tools are known from DE 94 04 308 Ul, EP 0 293 964 A2, EP 1 121 996 B l or EP 1 302 252 AI. The present invention has for its object to provide a bending press with a bending unit with a bending tool and to provide a method with which universal forming operations, in particular folds, are possible.

This object of the invention is solved by the features of claim 1. The advantage achieved by the features of claim 1 lies in the fact that the possibility is created to arrange the pivot axis of a bending tool and its bending jaws facing the bending edge either above or below the workpiece support level and align accordingly. Thus, the bending beam, together with the bending tool arranged thereon, can be arranged so far away from the workpiece support plane in the vertical direction, so that there is sufficient free space behind the workpiece

Jaws for arranging and / or receiving the workpiece to be formed is available. Thus, depending on the bending or Abkantrichtung to be carried out, the bending tool together with the bending tool carrying the bending beam can be adjusted in a position located on both sides of the workpiece support plane positions. Thus, no component of the bending unit is located directly behind the clamping jaws. Subsequently, the bending tool can be aligned with its bending edge in the direction of the respective forming edge of one of the lower or upper clamping jaws. This can be found with one and the same bending tool Auslangen, which can be aligned by the corresponding pivoting movement about the pivot axis, the bending edge to the respective bending direction and / or Abkantrichtung. Upon further adjustment of the forming process, in particular the Abkantvorgang. In this case, the leg to be bent is preferably pivoted onto the side facing away from the bending tool and thus into the free space behind the clamping jaws. Also advantageous is a further embodiment according to claim 2, characterized in that a torsion and thus the pivoting movement can be transmitted directly from the bending beam to the bending tool arranged thereon. Thus, a double function can be taken over by the bending beam designed as a shaft, since on the one hand carries the tool and is supported accordingly and on the other hand, a pivoting movement about the axis defined by the shaft pivot axis for the bending tool is made possible.

Another advantage is an embodiment according to claim 3, since it can be dispensed with additional drive means directly in the region of the bending tool for this, as a direct momentum transfer via the shaft takes place on the bending tool. Thus, in a correspondingly rotationally fixed connection or coupling additional space for the machining operations of the workpiece to be produced can be created. Due to the construction according to claim 4, it is possible to provide a compact unit, since so the shaft with the drive in connection therewith pivoting drive requires no additional adjusting means in the immediate vicinity of the bending tool. The transmission of the drive torque can therefore take place in at least one arranged in the direction of the bending region or the Umformkanten arranged end portion of the shaft.

According to another embodiment variant according to claim 5, the possibility is thus created to achieve a relative positional fixation of the bending edge with respect to the forming edges on the clamping jaws. Thus, with a corresponding preset angular position of a plane defined by the bending edge and the pivot axis tool plane with respect to the workpiece support level and / or the Biegewerkzeug- Verstellebene in a sole adjustment movement of the bending beam in the Biegewerkzeug- Verstellebene an adjustment be performed with unchanged angular position.

Also advantageous is a further development according to claim 6, since an eccentric guidance of the bending beam with the pivot axis defined by the latter is avoided laterally next to the bending tool adjustment plane defined by the bending beam guides. As a result, a more compact design of the bending unit can be created.

In the embodiment according to claim 7 it is advantageous that a more individualized design of the bending tool is made possible. By dividing the bending tool into a plurality of bending tool elements arranged one behind the other, a more individual adjustment of the entire bending tool to the respective bending and / or bending process to be carried out can be carried out. Through the development according to claim 8 it is achieved that only those bending tool elements can be brought into the working position, which are necessarily required for the bending and / or Abkantvorgang to be performed of the workpiece to be produced. Unnecessary bending tool elements can thus be arranged outside the working area and still remain stored on the bending beam.

Due to the construction according to claim 9, a rigid, designed as an axis bending beam for the storage of the bending tool or its bending tool elements can be created. An independent Ver pivoting and / or adjusting the individual bending tool elements can be done so to the supporting axis. In turn, an individual adjustment and pre-positioning of the individual bending tool elements required for the bending and / or bending process to be carried out can take place. Also advantageous is an embodiment according to claim 10, as can be done in a confined space of the drive and thus the rotational adjustment of the individual bending tool elements about the supporting axis.

According to one embodiment, as described in claim 11, so sufficient clearance can be created for the workpiece to be produced in the region of the workpiece support level also behind the jaws. Due to the laterally spaced apart arrangement of the bending beam guides exact guidance accuracy of the bending beam can be achieved and still be created on the side facing away from the jaws side of the bending beam a large space for the produced and / or workpiece to be machined fen.

The object of the invention is, however, independently of this also solved by a method for forming, in particular bending, of a sheet metal to a workpiece according to the features specified in claim 12. The advantages resulting from the combination of features of this claim are that it provides the possibility of arranging the pivot axis of the one bending tool and its bending edge facing the clamping jaws either above or below the workpiece support plane and aligning accordingly. Thus, the bending beam together with the arranged thereon Bending tool are arranged so far distanced from the workpiece support plane in the vertical direction, so that a sufficient space is available behind the jaws for arranging the workpiece to be formed. Thus, depending on the bending or Abkantrichtung to be carried out, the bending tool together with the bending tool carrying bending beam can be adjusted in a position located on both sides of the workpiece support plane positions. Subsequently, the bending tool can be aligned with its bending edge in the direction of the respective forming edge of the jaws. This can be found with one and the same bending tool Auslangen, which can be aligned by the corresponding pivoting movement about the pivot axis, the bending edge to the respective bending direction and / or Abkantrichtung. As a result of the superimposed, simultaneous adjustment and pivoting movement of the bending tool, a constant contact of the bending edge on the workpiece can be achieved. This surface damage can be almost avoided or even switched off. Furthermore, a procedure according to the features specified in claim 13 is advantageous because it allows a slight overbending and / or folding of the angled leg can be achieved. Thus, even with an elastic springback the predetermined bending angle of the leg can be maintained. A further advantageous procedure is described in claim 14, whereby a torsion transmission and thus the pivoting movement can be transmitted directly from the bending beam to the bending tool arranged thereon. In this way, a double function can be assumed by the bending beam designed as a shaft, since on the one hand it carries the bending tool and accordingly supports it, and on the other hand a pivoting movement about the pivot axis defined by the shaft is made possible for the bending tool.

Also advantageous is a variant of the method according to claim 15, because it can be dispensed with additional drive means directly in the region of the bending tool for this, as a direct torque transfer via the shaft takes place on the bending tool. Thus, in a correspondingly rotationally fixed connection or coupling additional space for the machining operations of the workpiece to be produced can be created. It is advantageous in the process selected according to claim 16 steps, so that a compact unit can be created, because so the shaft with the drive in connection therewith Verschwenkan drove no additional adjusting means in the immediate vicinity of the bending tool needed. The transmission of the drive torque can therefore take place in at least one arranged in the direction of the bending region or the Umformkanten arranged end portion of the shaft.

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

In each case, in a highly simplified, schematic representation: FIG. 1 shows a production plant with a bending press in a front view;

Fig. 2 shows the manufacturing plant of FIG. 1, in a side view with simplified shown

Bending unit, partially cut;

3 shows a partial region of the bending press with highly stylized bending unit, in side view;

Fig. 4 shows a portion of another bending press with highly stylized bending unit, 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 names, 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 position information selected 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. 1 and 2, a manufacturing plant 1 is shown in a highly schematically simplified representation, which is formed in the present case in particular for the swivel bending or swing bending of sheet metal to be produced workpieces 2. The manufacturing plant 1 used for bending in the present case comprises a bending press 3, in particular a press which is designed to clamp the workpieces 2 or workpieces to be produced from the sheet metal between a clamping tool 4 that is adjustable relative to one another. The clamping tool 4 comprises in the present embodiment, at least one, but usually a plurality of lower jaws 5 and at least one, but usually more cooperating upper jaws 6. The at least one upper jaw 6 is arranged above the workpiece to be manufactured 2 on the bending press 3 and there also held accordingly, in particular clamped. Also, the at least one lower jaw 5 is held on the bending press 3, in particular clamped.

A machine frame 7 of the bending press 3 comprises, for example, vertically upstanding from a base plate 8 and mutually parallel side cheeks 9, 10. These are preferably interconnected by a solid, formed for example of a sheet metal part cross member 11 at their distance from the bottom plate 8 end regions , The machine frame 7 is usually a solid, preferably on a hall floor fixed component of the bending press. 3

The side cheeks 9, 10 may be formed to form a clearance for the forming of the workpiece 2 preferably in approximately C-shaped, wherein attached to front end faces 12 of bottom flanges of the side cheeks 9, 10 a fixed, in particular on the bottom plate 8 upstanding lower clamping bar 13 is, which can also be referred to as a pressing bar. This stationary and fixed clamping bar 13 can also be referred to as a clamping table, are arranged on the parts of the bending tool 4 and also held. At the front end faces 14, a further upper clamping bar 16, in particular a pressure bar, which is relatively adjustable relative to the lower clamping bar 13, is guided on the leg remote from the base plate 8 in clamping bar guides 15. The clamping bar guides 15 are usually designed as linear guides in a variety of embodiments. This further clamping bar 16 can also be used as a pressing bar. be drawn, which, however, relative to the machine frame 7 is displaceably guided on this. On opposite, mutually parallel end surfaces 17, 18 of the two clamping bars 13, 16 jaw receiving 19, 20 are arranged for assembly with the clamping tools 4. The or the clamping tools 4 can also be held with the interposition of an adapter not shown on the jaw receiving 19, 20.

The bending press 3 shown has as drive arrangement 21 for the adjustable upper clamping bar 16, namely the pressure bar, e.g. two powered by electric power drive means 22 which are connected to a line fed from a power grid 23 control device 24. For example, the operation of the bending press 3 can be controlled via an input terminal 25 connected to the control device 24.

The drive means 22 are preferably electromotively operated spindle drives 26, as they are generally known, of which adjusting means 27 for a reversible

Actuating movement of the upper clamping bar 16 formed by the pressure bar with this, for example, drive connected.

Further details required for the operation of such a bending press 3, such as, for example, safety devices, stop arrangements and / or control devices, are omitted from the description in order to avoid an unnecessary length of the description.

Furthermore, the production unit 1 can also comprise a manipulator 28 shown here in simplified form in FIG. 2, which extracts at least a portion from a schematically indicated supply stack 29 of sheets to be deformed or folded and into the working area of the bending press 3 spends. The manipulator 28 in turn comprises a gripping tongs 30, shown in a simplified manner, which in turn has gripping fingers 31, 32. The gripping fingers 31, 32 each have clamping surfaces on the side facing the workpiece 2 to be produced. By a corresponding Ver pivoting of the two gripping fingers 31, 32 against each other and applying a sufficient clamping force, the sheet or the workpiece to be manufactured 2 is held by the manipulator 28 and moves accordingly and positi between the open jaws 5, 6 on the interaction of the clamping surfaces - oniert. With the gripper fingers 31, 32 of the gripping tongs 30 is a corresponding gripping and later ensured due to the clamping movement sufficient support for the workpiece to be produced from the sheet 2. It is further simplified here that the two clamping bars 13, 16, in particular their tool holders 19, 20, or the clamping tool 4 held thereon with his or her lower and upper jaws 5, 6, when viewed in the longitudinal direction of the clamping bar thirteenth , 16 define an adjustment plane 33 extending therebetween. The adjustment plane 33 preferably runs centrally with respect to the clamping bars 13, 16 or the jaw receivers 19, 20 arranged on them. In the present exemplary embodiment, a vertically oriented plane is understood here.

The two jaws 5, 6 form a clamping region 34 between them at mutually facing ends. Mutually facing lower and upper clamping surfaces 35, 36 of the two clamping jaws 5, 6 are preferably aligned at right angles with respect to the adjusting plane 33. An additional support table with a support surface may be arranged in the region of the front of the bending press 3, but is not shown in detail. The support surface can be arranged in the same plane as the lower clamping surface 35 of the lower jaw 5. This is used in larger sheets as additional support to prevent accidental kinking, especially with thin sheets.

In this case, a bending region 37 is understood to be that region which serves to form the workpiece 2 to be produced from the sheet metal, which is still mostly undeformed, or to further process an already pre-formed workpiece 2 by forming at least one additional fold.

The bending region 37 is usually spaced from the Verstellbene 33 and is formed by end portions of at least one of the two jaws 5 and / or 6. In the present exemplary embodiment, the bending region 37 is arranged on the side of the clamping bars 13, 16 facing away from the manipulator 28 or the operator. Thus within the machine frame 7. The bending region 37 usually forms a preferably rectilinear bending line on the workpiece 2 to be produced, wherein on both sides of this each leg forms as a result of the bending process carried out. Depending on the desired or produced geometry of the workpiece 2, the two legs enclose between them a bending angle. This bending angle is measured in a reference plane aligned perpendicular to the bending line. The reference plane, for its part, is furthermore preferably also aligned with respect to the adjustment plane 33 in the vertical direction.

It should be mentioned that the machine frame 7 of the bending press 3 is shown only in a very simplified manner, it also being possible to use deviating embodiments thereof. So could e.g. the machine frame 7 and the machine body may be formed with a free stator passage. In this case, the jaw receivers 19, 20 could be received between the side walls 9, 10 and side panels. In another embodiment of the machine frame 7 or of the machine body, no free stator passage is possible, as a result of which the clamping jaw receptacles 19, 20 can not be received between the side cheeks 9, 10 or side parts.

To carry out the bending operation, the bending press 3 of the production s anläge 1 also includes a bending unit 38, which may also be referred to as Abkanteinheit. This is simplified in the Fig. 2 indicated and can be adjusted relative to the machine frame 7 in a preferably parallel with respect to the adjusting plane 33 aligned bending tool adjustment plane 39. For the sake of clarity, the representation of the bending unit 38 and its components has been omitted in the FIGURE. In this case, the pre-positioned between the two jaws 5, 6 and clamped held sheet to form the workpiece 2 by a bending operation, in particular a bending process, along the bending region 37 forming bending line formed, in particular be folded. Depending on the fold to be performed between the clamping jaws 5, 6 clamped held sheet for the preparation of the workpiece 2, either the lower jaw 5 or the upper jaw 6 forms the bending region 37 from. Thus, the lower jaw 5 forms a first Umformkante or has this. The upper jaw 6 forms or has a second forming edge.

The at least one lower clamping jaw 5 has a lower clamping surface 35 on its end area facing the upper clamping jaw 6. The at least one upper clamping jaw 6 has an upper clamping surface 36 at its end region facing the lower clamping jaw 5. The two clamping surfaces 35, 36 define in a contiguous position a workpiece support plane 40 for the workpiece to be produced 2. The bending unit 38 includes a bending tool 41, which has a bending edge 42.

The bending tool 41 is arranged on a bending beam 43, wherein the bending beam 43 is adjustable relative to the machine frame 7 on bent beam guides 44 designed as linear guides by means of a bending beam drive 45. Furthermore, the bending tool 41 is aligned about a parallel with respect to one of the Umformkanten running

Pivot axis 46 pivotable. Basically, a pivot axis is understood to be a central axis and not a physical component. The pivotal axis forming different components will be described in more detail below.

The bending beam guides 44 are preferably arranged or formed in the region of the two side cheeks 9, 10 and are thus arranged at a distance from one another in the direction of the bending region 37 or the forming edges. The bending beam 43 is guided on the bending beam guides 44 at its end portions which are also distanced from one another in the direction of the bending region 37 or the forming edges. This can be created behind the two jaws 5, 6 sufficient clearance for the workpiece 2 to be produced. As a result of the vertical adjustment possibility of the bending beam 43, a large working area can be created for the leg of the workpiece 2 to be folded, since no bending beam 43 with the bending tool 41 is arranged directly in the region of the workpiece support plane 40 behind the clamping jaws 5, 6 before the beginning of the forming process , Before the start of the bending and / or bending operation, the bending beam 43 is either above or below the workpiece support plane 40.

The bending unit 38 with the clamping jaws 5, 6 holding the workpiece 2 to be produced by clamping is described in more detail in the following FIG. As a coordinate system or coordinate direction, the following alignment is selected in bending presses 3 in the present specification. The X-coordinate represents the insertion direction of the sheet to be formed and is aligned at right angles with respect to the adjustment plane 33. The Y-coordinate represents the vertical direction and is aligned at right angles with respect to the workpiece support plane 40. Finally, the Z coordinate in the direction of the bending region 37 is aligned.

FIG. 3 shows an optionally independent embodiment of the bending unit 38, wherein the same reference numerals or component designations are used for the same parts as in the preceding FIGS. 1 and 2. In order to avoid unnecessary repetition, reference is made to the detailed description in the preceding Figs. 1 and 2 or reference. It should be noted that in the representation of the bending unit 38, these or its components have been shown only greatly simplified and stylized. Furthermore, in this embodiment, the bending unit 38 on the side facing away from the operator not shown side of the jaws 5, 6 are arranged. The bending beam guides 44 are also seen in the direction of the bending region 37, spaced from one another. Between these, in turn, the bending beam 43 extends with the bending tool 41 arranged thereon.

The bending beam guide 44 is preferably arranged in the region of the two side cheeks 9, 10 so as to accommodate the two clamping jaws 5, 6 between the bending beam guides 44 as seen in the longitudinal extent of the bending region 37, free space for arranging the workpiece 2 or the workpiece to be produced To have sheet metal. The bending beam guide 44 may be formed by a variety of known prior art guide units and / or leadership regulations. It is essential to form an exact linear guide for the bending beam 43. The bending beam guides 44 forming the guideways serve to be able to guide the bending beam 43 in an exact linear guide along the bending tool adjustment plane 39 for the exact execution of a bending operation or folding operation. The choice of the bending beam drive 45 can also be made according to the drive means known in the prior art. Here, for example, cylinder piston arrangements, linear drives, traction drives or the like could be used. Defined by the bending beam 43 pivot axis 46 for the bending tool 41 forms the central pivot base and / or the pivot center for the bending tool 41. The bending unit 38 includes the bending tool 41, which seen around the pivot axis 46 in different angular position with respect to this circumferential direction pivoted about it can be. Furthermore, the pivot axis 46 and thus the bending beam 43 can be displaced both into a position that is relative to the workpiece support surface 40 above the workpiece support plane 40 and into a position located below the workpiece support plane 40. This is already indicated in simplified form in FIG. 2.

As a result, the possibility is created to shift the bending tool 41 to the respective side of the workpiece support surface 40, depending on the bending process to be carried out or the direction of descent. Since the bending tool adjustment plane 39 is preferably oriented parallel to the bending region 37 or parallel to one of the two forming edges of the clamping jaws 5 and / or 6 and parallel to the adjustment plane 33, an equal horizontal distance over the entire vertical extent or Vertical stretching of the bending tool adjustment plane 39 between this and the bending region 37 created. Preferably, the workpiece support plane 40 is arranged or formed in a horizontal plane, in which case the bending tool adjustment plane 39 is preferably aligned at right angles thereto. Regardless of this, it would also be possible to align or arrange the bending tool adjustment plane 39 at an angle and not at right angles with respect to the workpiece support plane 40. Thus, for example, starting from the bending region 37 in the direction of the vertical extension of the bending tool adjustment plane 39, a different horizontal distance can be formed. This can be created by the oblique guidance of the bending beam 43 a more universal training and formability of the bending unit 38.

Due to the possibility of pivoting or rotation of the bending tool 41 about the pivot axis 46 can in this embodiment, the bending unit 38 with a single Bending tool 41 a bending and / or Abkantvorgang both in a direction above the workpiece support level 40 and a direction below the workpiece support level 40 are performed. If the workpiece support plane 40 is used as the basis or zero plane, the pivot axis 46 can be adjusted in the Y direction in both the minus direction and in the plus direction.

Because of this pivoting or adjustment possibility of the bending tool 41 about the pivot axis 46, the bending tool 41 can thus be aligned with the clamping jaws 5, 6 facing bending edge 42 downward in the direction of the first Umformkante at a located above the workpiece support plane 40 position of the pivot axis 46 be. In this position, the sheet metal held in the clamping region 34 or the workpiece 2 to be produced can be formed into a position located below the workpiece support plane 40, in particular be folded. If the bending tool 41 is adjusted with its pivot axis 46 into a position of the pivot axis 46 situated below the workpiece support plane 40, its bending edge 42 facing the clamping jaws 5, 6 can be turned upwards when a corresponding adjustment and / or pivoting movement of the bending tool 41 is performed Direction to the second forming edge to be aligned. In this position, with the same bending tool 41, the leg of the workpiece 2 to be formed can be reshaped into a position located above the workpiece support plane 40.

In the present embodiment according to FIG. 3, the bending beam 43 is formed as a corporeal wave. In this case, the shaft defines the pivot axis 46 for the bending tool 41. Furthermore, the bending tool 41 can be connected in a rotationally fixed manner to the shaft or can be coupled with it in a torque-proof manner. This makes it possible, when the shaft is drivingly connected to a pivot drive, not shown, to pivot in its angular position about the pivot axis 46 and / or to rotate. Since the bending tool 41 rotatably connected to the shaft or can be rotatably coupled with this, can be done by means of the Ver schwenkantrieb s, the orientation and position of the bending edge 42 to be performed each bending and / or bending operation. By means of the bending beam guides 44, in this exemplary embodiment, the shaft and thus the bending beam 43 formed by the latter can be adjusted in a translatory adjustment movement in the bending tool adjustment plane 39. The additional rotary pivoting movement and / or rotational movement of the bending tool 41 with its bending edge 42 takes place directly about the pivot axis 46. In the present exemplary embodiment, the rotary movement and / or pivoting movement is transmitted from the pivot drive to the shaft and subsequently to the bending tool 41. In a corresponding, rotationally fixed coupling and / or holder so a universal use of the bending unit 38 can be achieved.

If the position of the bending edge 42 and thus the angular orientation of the bending tool 41 with respect to the workpiece support plane 40 set, can with the forming process, in the present embodiment, with the bending and / or Abkantvorgang begun. As already described above, the bending beam 43 with the bending tool 41 is arranged either below the workpiece support plane 40 or above the workpiece support plane 40 even before the clamped holding of the sheet for the workpiece 2 to be produced. Subsequently, the sheet for the production of the workpiece 2 between the spaced apart arranged jaws 5, 6 is inserted and positioned accordingly. In this position, a leg of the workpiece 2 to be folded off and / or bent is clamped over the forming edges formed on the clamping jaws 5 and / or 6 in the direction of the clamping jaw 3 Bending tool 41 projecting arranged. Subsequently, the bending edge 42 of the bending tool 41 is aligned in the direction of one of the forming edges of the clamping jaws 5 and / or 6, depending on the bending direction and / or the withdrawal direction to be carried out. This alignment is carried out by the above-described pivoting movement of the bending tool 41 about the parallel with respect to at least one of the peripheral edges aligned pivot axis 46th

Once this alignment and pre-positioning of the bending edge 42 has been carried out on the workpiece 2 to be produced, the bending tool 41 is adjusted by means of the

Longitudinal adjustment of the bending beam 43 along the trained as linear guides bending beam guides 44 of the bending unit 38 in the parallel with respect to at least one of the Umformkanten running aligned bending tool Ver level 39 towards This is done until an application and / or concern of the bending edge 42 is made to the surface of the workpiece 2 to be produced.

In this position, the actual bending and / or bending process begins. In this case, a further adjustment of the bending tool 41 by the longitudinal adjustment of the bending beam 43 in the bending tool adjustment plane 39 in the same adjustment direction. At the same time, however, the pivoting of the bending tool 41 about the pivot axis 46 can also be carried out, so as to achieve a continuous abutment of the bending edge 42 on the workpiece 2 to be produced. This simultaneous, in particular superimposed adjustment process of the translational adjustment movement and of the rotational adjustment movement takes place until the predetermined bending angle on the workpiece 2 to be produced is reached. As a result of the simultaneous, superimposed adjustment and pivoting movement, it is possible to achieve a stationary contact and / or a rolling of the bending edge 42 of the bending tool 41 on the surface of the workpiece 2.

In order to avoid an elastic springback of the truncated leg, it may still be advantageous if, when reaching the predetermined bending angle on the workpiece 2 to be produced, the adjusting movement of the bending tool 41 in the direction of the bending tool adjustment plane 39 is terminated and a further pivoting of the bending tool 41 about the pivot axis 46 is performed. This can be done overpressing and after the springback of the exact bending angle can be achieved.

If the bending tool 41 is non-rotatably connected to the shaft and / or rotationally fixedly coupled and the shaft is drivingly connected to a pivoting drive, the pivoting drive can be designed such that it holds the shaft positioned relative to its relative position about the pivot axis 46. This positional fixation of the bending tool 41 about the pivot axis 46 and thus its bending edge 42 creates the possibility of adjusting the bending beam 43 in the bending beam guide 44 while maintaining the distance between the bending edge 42 and the bending tool adjustment plane 39 unchanged can.

Furthermore, it may be advantageous if the pivot axis 46 is arranged to extend in the Biegewerkezug- Verstellebene 39 defined by the bending beam guides 44. So that can an eccentric or off-center arrangement of the pivot axis 46 with respect to the bending beam guides 44 can be avoided.

FIG. 4 shows an optionally independent embodiment of the bending unit 38, in particular its bending tool 41, wherein the same reference numerals or component designations are used for the same parts as in the preceding FIGS. 1 to 3. In order to avoid unnecessary repetition, reference is made to the detailed description in the preceding Figs. 1 to 3 or reference. In order to achieve a better and more individual adaptation of the bending tool 41 to different bending processes, in particular bending processes, it can be advantageous if the bending tool 41 comprises a plurality of bending tool elements 47 arranged one behind the other in the longitudinal extent of the pivot axis. This creates the possibility of being able to tune the length of the inserted bending edge 42 of the bending tool 41 to the respective length of the bending region 37 by arranging several bending tool elements 47 one behind the other.

In this case, it is advantageous if the bending tool elements 47 are connected in rotationally fixed manner to the shaft in mutually different angular positions or are coupled in a rotationally fixed manner with the shaft. By choosing the different angular positions relative to one another, some of the bending edges 42 can be used for the bending process, but bending tool elements 47 arranged adjacent thereto are not brought into contact with the workpiece 2 to be produced. Regardless, it would also be possible that the bending beam 43 itself is designed as a supporting axis and not as a supporting shaft. The axis is held against rotation on the bending beam guide 44 and adjustable even in the bending tool adjustment plane 39 by the bending beam drive 45, as has already been described above for the shaft.

Once the bending tool 41 has been formed from individual bending tool elements 47, at least some of the bending tool elements 47 can each be drive-connected with their own adjusting drive 48. This creates the opportunity for the individual Biegewerkzeugelemente 47 individually relative to the pivot axis 46 to be able to relocate relative to each other on the supporting axis in rotational adjustment movement. For example, the at least one adjusting drive 48 could be arranged between the supporting axle and the respective bending tool element 47. The Versteilantrieb 48 is simplified indicated in dashed lines and may be formed by a wide variety of adjustment and / or drive means. On the representation of the power supply and other drive details was omitted for the sake of clarity.

The embodiments show possible embodiments of the manufacturing plant 1, in particular its bending press 3, 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 mutually possible and this variation possibility due to Teaching for technical action by objective invention in the skill of those working in this technical field is the expert.

Furthermore, individual features or combinations of features from the different exemplary embodiments shown and described can also represent independent, inventive or inventive solutions.

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

All information on ranges of values in the description of the subject should be understood to include any and all sub-ranges thereof, e.g. is the statement 1 to 10 to be understood that all sub-areas, starting from the lower limit 1 and the upper limit 10 are included, ie. all sub-areas 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.

Above all, the individual in Figs. 1, 2; 3; 4 embodiments form the subject of independent solutions according to the invention. The relevant, Duties and solutions according to the invention can be found in the detailed descriptions of these figures.

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 bending press 3, these or their components were shown partially uneven and / or enlarged and / or reduced.

REFERENCE NUMBERS

Production plant 31 Greiffinger

Workpiece 32 Gripper finger

Bending press 33 Adjustment level

Clamping tool 34 clamping area

lower jaw 35 lower clamping surface upper jaw 36 upper clamping surface

Machine frame 37 Bending area

Base plate 38 bending unit

Sidewall 39 Bending tool adjustment plane

Sidewall 40 Factory floor level

Cross dressing 41 bending tool

Front end face 42 bending edge

Clamping bar 43 bending beam

Front end face 44 Bending beam guide

Clamping bar guide 45 Bending beam drive

Clamping bar 46 pivot axis

Face 47 Bending tool element

Face 48 Adjustment drive

Jaw recording

drive arrangement

drive means

energy grid

S teuervorrichtung

input terminal

spindle drive

actuating means

manipulator

Stock pile

tongs

Claims

Patent claims

1. bending press (3) for forming, in particular bending, of a sheet to a workpiece (2), comprising a fixed machine frame (7), a lower

Clamping bar (13) with at least one lower clamping jaw (5) held thereon, which at least one clamping jaw (5) has a first forming edge, an upper clamping bar (16) with at least one upper clamping jaw (6) held thereon, which at least one clamping jaw (6 ) has a second forming edge, wherein the upper clamping bar (16) on a clamping bar (15) by means of a drive assembly (21) relative to the machine frame (7) is adjustable to the workpiece to be produced (2) between the two jaws (5, 6 ), and the at least one lower jaw (5) has a lower clamping surface (35) at its end region facing the upper clamping jaw (6) and the at least one upper clamping jaw (6) has its end region facing the lower clamping jaw (5) an upper clamping surface (36), wherein the two clamping surfaces (35, 36) in a contiguous position a workpiece support plane (40) for the work to be produced piece (2), a bending unit (38) with a bending tool (41), which has a bending edge (42) and the bending tool (41) on a bending beam (43) is arranged, wherein the bending beam (43) formed as linear guides Bending beam guides (44) by means of a bending beam drive (45) relative to the machine frame (7) is adjustable, and the bending tool (41) about a parallel with respect to one of the Umformkanten extending pivot axis (46) is pivotable, characterized in that the pivot axis (46) is displaceable both in relation to the workpiece support plane (40) above the workpiece support plane (40) and into a position located below the workpiece support plane (40), and the bending tool (41) is located above the workpiece support plane (40). located position of the pivot axis (46) with its the jaws (5, 6) facing the bending edge (42) down in the direction of the ers te Umformkante is aligned and the same bending tool (41) at a below the workpiece support plane (40) located position of the pivot axis (46) with its the jaws (5, 6) facing bending edge (42) upward in the direction of the second forming edge is aligned.

2. bending press (3) according to claim 1, characterized in that the bending beam

(43) is designed as a supporting shaft and the shaft defines the pivot axis (46) for the bending tool (41).

3. bending press (3) according to claim 2, characterized in that the bending tool (41) rotatably connected to the shaft or is rotatably coupled thereto.

4. bending press (3) according to claim 2 or 3, characterized in that the shaft is connected to a pivot drive s drive.

5. bending press (3) according to claim 4, characterized in that the shaft with respect to its relative position about the pivot axis (46) is held positioned by the pivot drive.

6. bending press (3) according to any one of the preceding claims, characterized in that the pivot axis (46) is arranged to extend in a by the bending beam guides (44) defined Biegewerkzeug- Verstellebene (39).

7. Bending press (3) according to any one of the preceding claims, characterized in that the bending tool (41) comprises a plurality of longitudinal extension of the longitudinal axis of the pivot axis (46) arranged one behind the other bending tool elements (47).

8. bending press (3) according to claim 7, characterized in that the bending tool elements (47) are rotatably connected in mutually different angular positions with the shaft or rotatably coupled thereto.

9. bending press (3) according to claim 1 or 6, characterized in that the bending beam (43) is designed as a supporting axis and at least some of the bending tool elements (47) are each drivingly connected to a Versteilantrieb (48).

10. bending press (3) according to claim 9, characterized in that the at least one Versteilantrieb (48) between the supporting axle and the at least one Biegewerk- zeugelement (47) is arranged.

11. bending press (3) according to any one of the preceding claims, characterized in that the bending bar (43) of the bending unit (38) is guided at its spaced apart end portions of the in the direction of Umformkanten distanced from each other arranged bending beam guides (44).

12. A method for forming, in particular bending, a sheet to a workpiece (2), in particular using the bending press (3) according to one of the preceding claims, comprising the following steps:

- Side distanced arrangement of a bending unit (38) of clamping jaws (5, 6) of a bending press (3), wherein the bending unit (38) arranged on a bending beam (43) and about a pivot axis (46) pivotally mounted bending tool (41) , and thereby either the pivot axis (46) and a bending edge

(42) of the bending tool (41) above the workpiece to be produced (2) or the pivot axis (46) and the bending edge (42) of the same bending tool (41) can be arranged below the workpiece to be produced;

clamping of the workpiece (2) to be produced between the clamping jaws (5, 6) of the bending press (3), wherein a leg of the workpiece (2) to be bent over projecting edges formed on the clamping jaws (5, 6) projecting in the direction of the bending tool ( 41) is arranged;

- Aligning the bending edge (42) of the bending tool (41) in the direction of the forming edges of the clamping jaws (5, 6) by a pivoting movement of the bending tool (41) about the parallel with respect to at least one of the Umformkanten running aligned pivot axis;

- Adjusting (46) of the bending tool (41) by longitudinal adjustment of the bending beam

(43) along bending element guides (44) of the bending unit (38) formed as linear guides in a bending tool adjustment plane (41) aligned parallel to at least one of the forming edges in the direction of the workpiece (2) to be produced, thereby applying the bending edge (42 ) to the workpiece (2) to be produced;

- further adjustment of the bending tool (41) in the bending tool adjustment plane (39) in the same adjustment direction and simultaneous pivoting of the bending unit (41) about the pivot axis (46) until reaching the predetermined bending angle on the workpiece to be produced (2).

13. The method according to claim 12, characterized in that upon reaching the predetermined bending angle of the workpiece to be produced (2) the adjustment of the bending tool (41) in the bending tool adjustment plane (39) is terminated and a further pivoting of the bending tool (41) is performed about the pivot axis (46).

14. The method according to claim 12 or 13, characterized in that the bending tool (41) is arranged on a bearing-shaped shaft, wherein of the shaft, the pivot axis (46) for the bending tool (41) is defined.

15. The method according to claim 14, characterized in that the bending tool (41) rotatably connected to the shaft or rotatably coupled with this.

16. The method according to claim 14 or 15, characterized in that the shaft with a pivot drive s is connected.