EP0873206B1 - Bending machine - Google Patents

Bending machine Download PDF

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Publication number
EP0873206B1
EP0873206B1 EP97942909A EP97942909A EP0873206B1 EP 0873206 B1 EP0873206 B1 EP 0873206B1 EP 97942909 A EP97942909 A EP 97942909A EP 97942909 A EP97942909 A EP 97942909A EP 0873206 B1 EP0873206 B1 EP 0873206B1
Authority
EP
European Patent Office
Prior art keywords
bending
segment
beam tool
pressure surface
bending machine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP97942909A
Other languages
German (de)
French (fr)
Other versions
EP0873206A1 (en
Inventor
Wolfgang Kutschker
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Reinhardt Maschinenbau GmbH
Original Assignee
Reinhardt Maschinenbau GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Reinhardt Maschinenbau GmbH filed Critical Reinhardt Maschinenbau GmbH
Publication of EP0873206A1 publication Critical patent/EP0873206A1/en
Application granted granted Critical
Publication of EP0873206B1 publication Critical patent/EP0873206B1/en
Anticipated expiration legal-status Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/04—Bending sheet metal along straight lines, e.g. to form simple curves on brakes making use of clamping means on one side of the work
    • B21D5/042—With a rotational movement of the bending blade
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/04—Bending sheet metal along straight lines, e.g. to form simple curves on brakes making use of clamping means on one side of the work

Definitions

  • the invention relates to a bending machine comprising a lower beam with a lower beam tool, an upper beam with an upper beam tool, the upper beam tool and the lower beam tool being movable relative to one another for clamping a workpiece, and a bending beam pivotable about a pivot axis with bending beam tool segments arranged thereon, each of which Comprises pressure surface segment, wherein from the pressure surface segments a bending cheek pressure surface acting on the workpiece during bending can be assembled.
  • Bending machines of this type are known from the prior art.
  • the width of the bending cheek pressure surface is adapted to the respective workpiece to be bent by placing a corresponding number of bending cheek tool segments on the bending cheek. If it is necessary to change the width of the bending beam pressure surface during the bending of a workpiece, at least one bending beam tool segment must always be moved or removed.
  • DE-U-9307907 discloses such a bending machine according to the preamble of claim 1
  • the invention is therefore based on the object of improving a bending machine of the generic type in such a way that a change in the width of the bending cheek pressure surface is possible in a simple manner.
  • At least one bending beam tool segment is provided with an adjustable pressure surface segment that in the bending beam tool segment the pressure surface segment can be moved from an active position in which it contributes to the pressure surface of the bending beam tool to an inactive position in which it is ineffective during a bending operation, and that in the inactive position standing pressure surface segment, all areas of the bending beam tool segment remaining in their position on the bending beam, which pass through the workpiece plane during a bending operation, lie outside a free space defined by a free space radius around the bending edge.
  • the advantage of the solution according to the invention is thus to be seen in the fact that the adjustable bending beam tool segment means that there is no need to move or remove a bending beam tool segment as a whole, since the adjustable bending beam tool segment always remains in the same position on the bending beam during the bending of a workpiece by means of the required bending operations, and changing use of the adjustable bending beam tool segment, in particular in the course of machining a workpiece, is thus possible in a simple manner, since only a movement of the pressure surface segment between the active and the inactive position is required.
  • a particularly favorable solution provides for the movable pressure surface segment to be offset in the direction of the bending beam with respect to the active position in the inactive position. This solution allows the printing surface segment to be brought into an inactive position in a simple manner, in which an interaction with the workpiece in the course of the bending can be avoided.
  • the pressure surface segment can in principle be moved in different directions in order to bring it from the active position to the inactive position. For example, it is conceivable to move the pressure surface segment in the bending direction in order to reach the inactive position.
  • a particularly advantageous solution provides that the movable pressure surface segment, which is in the inactive position, is in a bending starting position on a side of a lower jaw tool tip of the lower beam tool facing away from the upper jaw tool. A slight swiveling movement of the pressure surface segment is thus sufficient to bring it from the active position into the inactive position.
  • adjustable bending beam tool segment has a foot part and a pressure web carried by the latter, which carries the movable pressure surface segment, and that the pressure web is movable relative to the foot part.
  • This configuration of the adjustable bending beam tool segment makes it possible to easily move the pressure surface segment between the active and the inactive position.
  • the pressure web carrying the movable pressure surface segment does not come into contact with the workpiece during bending and thereby causes undesired bending of the workpiece, it is preferably provided that the pressure web is in the inactive position of the movable pressure surface segment during the course of a bending operation moved to a workpiece level without contact.
  • This contact-free movement of the pressure web relative to the workpiece plane can be achieved particularly favorably by the pressure web remaining on one side of the workpiece plane during the bending operation without touching it.
  • An expedient embodiment of a solution according to the invention provides that the pressure web can be moved in the direction opposite to the bending pivot direction when moving from the active into the inactive position, so that the pressure web is offset in relation to the active position in the opposite direction to the bending pivot direction and thus also during the bending operation, that is to say a movement of the pressure web in the direction of the pivoting movement, based on the active position, runs behind it.
  • a favorable geometry with regard to the positioning of the pressure web in the inactive position can be achieved if the pressure web is in the bending end position on a side of the workpiece plane facing the bending start position.
  • the movable pressure surface segment is in its active position immediately next to a bending edge of the lower beam or upper beam tool, and an adjustment of the Bending beam tool segment from the active in the inactive position to a collision with, for example, the lower beam tool, it is preferably provided that the bending beam is displaceable relative to its pivot axis, in order to move the movable pressure surface segment from the active into the inactive position and vice versa to have.
  • the bending beam is preferably moved relative to its pivot axis in such a way that the adjustable bending beam tool segment moves away from the bending edge defined by the upper beam tool or the lower beam tool, and thus an undisturbed movement of the movable pressure surface segment is possible.
  • the axis about which pivoting takes place preferably runs parallel to a bending edge.
  • the pressure web can be pivoted relative to the foot part about an axis parallel to the movable pressure surface segment, which is arranged on one side of a perpendicular to the movable pressure surface segment. If the pressure bar runs approximately parallel to the perpendicular, the axis is also on one side of the pressure bar. If the active to inactive position is pivoted in a direction pointing away from the axis, then in addition to the pivoting of the pressure web, this solution also lowers the pressure surface segment in the direction of the bending beam.
  • the position of the axis is particularly favorable if it lies on a front side of the pressure web in the direction of the pivoting swivel, since this allows the pressure web to be moved from the active to the inactive position opposite to the direction of the swivel.
  • a particularly favorable solution provides that the pressure web can be supported in the active position by a support arm which can be moved back and forth between a supporting position and a non-supporting position.
  • This solution has the advantage that on the one hand it is easy to operate and on the other hand it ensures stable support of the pressure bar in the active position.
  • the support arm is pivotally mounted on a bearing body of the pressure web and the bearing body of the pressure web forms a toggle lever mechanism together with the support arm, which supports the pressure web in a stable manner in the active position.
  • the support arm is guided with its free end in a setting which specifies the supporting and the non-supporting position.
  • the support position of the support arm and the movement of the support arm from the support position to the non-support position and vice versa can be predefined in a defined manner.
  • a particularly expedient solution provides that the support arm can be actuated by a slide.
  • the slide acts on the end of the support arm guided in the link to move it along the link.
  • one is preferably the adjustable one Bending beam tool segment operable manipulator is provided, which can be controlled via a machine control of the bending machine. This means that the adjustable bending beam tool segment can be adjusted automatically and directly via the machine control.
  • the manipulator can be moved parallel to the bending beam so that it can reach each adjustable bending beam tool segment arranged on the latter.
  • the manipulator is preferably provided with an actuating arm, which can also be controlled via the machine control and which interacts with the adjustable bending beam tool segment, for example accessing it.
  • the actuating arm can access the adjustable bending beam tool segment in a wide variety of ways. In the simplest case, it is provided that the actuating arm interacts with the slide of the adjustable bending beam tool in order to move the movable pressure surface segment from the inactive to the active position and vice versa.
  • An exemplary embodiment of a bending machine according to the invention shown schematically in FIG. 1, comprises a machine frame 10 with which a lower beam 12 is fixedly connected. Furthermore, an upper beam 14 is mounted on the machine frame 10 so as to be pivotable about a pivot axis 16 and thus in Movable in a direction 18 toward or away from the lower beam 12 in order to clamp a workpiece, designated as a whole as 20, for example a sheet metal part, for bending.
  • the lower beam 12 is provided with a lower beam tool 22 and the upper beam 14 with an upper beam tool 24, which is preferably constructed from a plurality of upper beam tool segments 26, in order to be able to make the upper beam tool 24 flexible in terms of its width B.
  • a bending beam designated as a whole with 30 is provided, which carries a bending beam tool designated as a whole with 32.
  • the bending beam 30 is in turn supported on the bending beam arms 34 arranged on opposite sides thereof, the bending beam arms 34 being mounted on the machine frame 10 so as to be pivotable about a pivot axis 36.
  • the entire bending beam 30 can be moved about the pivot axis 36 in a bending pivot direction 38, this movement taking place by means of a drive not shown in the drawing in FIG. 1.
  • the bending beam 30 is not held firmly on the bending beam arms 34, but can be moved linearly in a direction 40, the direction 40 running approximately parallel to the longitudinal direction of the bending beam arms 34 and parallel to a radial direction to the pivot axis 36.
  • the entire bending beam 30 in its starting position shown in FIG. 1 is adjustable relative to the workpiece 20 clamped between the lower beam tool 22 and the upper beam tool 24.
  • the adjustment is preferably carried out via an actuator 42 arranged in the bending beam arms 34, which in the simplest case is designed as a cylinder with which the bending beam 30 can be moved relative to the bending beam arms 34 between an upper position and a lower position.
  • the bending beam tool 32 In order to be able to adapt the bending beam tool 32 to different widths B of the workpiece 20, in particular the edge region 20a lying between and offset from edge regions 20b, the bending beam tool 32, as shown in FIGS. 1 and 2, consists of a plurality of stationary bending beam tool segments 44 constructed, which are interchangeably mounted on the bending beam 30.
  • Each of these stationary bending beam tool segments 44 comprises a foot part 46 with which it rests on the bending cheek 30 and a pressure web 48 which is held stationary on the foot part 46 and forms a pressure surface segment 50 which is likewise stationary relative to the foot part 46, the pressure surface segments 50 forming contribute to a composite bending beam pressure surface 52 of the bending beam tool 32.
  • adjustable bending beam tool segments 54 are also provided on the bending beam 30, which likewise comprise a foot part 56 and a pressure web 58, which carries a pressure surface segment 60 that can be moved relative to the foot part 56.
  • the movable pressure surface segments 60 contribute to the formation of the pressure surface 52 of the bending beam tool 32 or not, the bending beam tool 32 being composed of the sum of the stationary bending beam tool segments 44 and the adjustable bending beam tool segments 54.
  • the bending beam tool segments 54 are preferably arranged on the side of a stationary bending beam tool section 62 which is constructed from all the stationary bending beam tool segments 44.
  • the adjustable bending beam tool segments 54 first serve to bend the edge regions 20b in their active position, in which case the stationary bending beam tool section 62 is also moved without a bending task, and then in their inactive position to bend the edge region 20a, which lies between lateral edge regions 20b of the workpiece 20 lies without touching the lateral edge regions 20b of the workpiece 20 and without having to dismantle the bending beam tool segments 54.
  • the adjustable bending beam tool segments 54 are to be arranged such that their movable pressure surface segments 60 act on the outer edge regions 20b of the workpiece when the bending beam 30 is pivoted about the pivot axis 16 and - as shown in the exemplary embodiment - these outer edge regions 20b of the workpiece Bend the workpiece 20 while the edge area 20a is not in the working area of the bending beam tool 32 because it is set back, for example, from the edge areas 20b.
  • the movable pressure surface segment 60 as shown in FIG. 3, is in its active position, in which it acts on the edge region 20b when the bending beam 30 is pivoted about the pivot axis 16.
  • the movable pressure surface segment 60 can be brought into an inactive position, in which it does not act on a workpiece 20 clamped between the lower beam tool 22 and the upper beam tool 24.
  • the movable pressure surface segment 60 can preferably be brought into an inactive position from its active position, in which it directly adjoins a workpiece plane 64 and lies laterally next to a lower jaw tool tip 68 defining a bending edge 66 together with an upper beam tool tip 67, in which the movable pressure surface segment 60 is facing a lower surface 72 of the lower jaw tool tip 68 facing away from a clamping surface 70 of the lower jaw tool tip 68 and is thus offset relative to the bending edge 66 in a direction 74 opposite to the bending pivot direction 38.
  • the adjustable bending beam tool segment 54 In order to be able to move the pressure surface segment 60 from the active position, shown in FIG. 3, to the inactive position, shown in FIG. 4, the adjustable bending beam tool segment 54, as shown enlarged in FIGS. 5 and 6, comprises an am Pressure web 58 integrally formed bearing body 80, on the opposite sides of which two bearing bolts 84, 86 arranged coaxially to an axis of movement 82 are received are.
  • the bearing bolts 84, 86 engage in bearing flanges 88, 90 of the foot part 56, which project upwards from a foot plate 92 of the foot part 56 in the direction of the bearing body 80.
  • the axis of movement 82 lies on a side 94 of the bearing body 80 pointing in the direction of the pivoting movement 38, while the pressure web 58 is formed on an area 93 of the bearing body 80 opposite the side 94 and rises from the latter.
  • the movement axis 82 is thus arranged offset with respect to a central perpendicular 95 of the pressure surface segment 60 in the direction of the bending pivot direction 38.
  • the bearing body 80 has an approximately central recess 96, in which a support arm 98 is arranged, which comprises two adjacent levers 100, 102, each of which is pivotable by means of a bearing bolt 104, 106 in a corresponding receptacle 108, 110 in the bearing body 80 is mounted, the receptacles 108 and 110 extending into the bearing body 80 on both sides of the recess 96.
  • the two levers 100, 102 extend to a common sliding bolt 112 and are also rotatably mounted thereon with their end regions 114 and 116 opposite the respective bearing bolts 104 and 106, respectively.
  • the sliding pin 112 is seated on a slide 118, which is preferably located centrally between the two levers 100, 102, so that the sliding pin 112 extends through the slide 118 and on both sides thereof for mounting the end regions 114, 116 of the levers 100, 102.
  • the slider 118 is guided in a guide slot 120 of the bearing body 80, the guide slot 120 extending from the side 94 extending through the bearing body 80 and opening into the recess 96. Furthermore, the slide 118 is guided with its underside 122 resting on an upper side 124 of the foot plate 92.
  • the sliding pin 112 extends from the slide 118 through the levers 100, 102 and beyond and is in each case guided with its outer ends 126, 128 in longitudinal guides for these elongated holes 130, 132, which are arranged in flange plates 134, 136 which are arranged rise from the foot plate 92 and are firmly connected to it.
  • the elongated holes 130 and 132 preferably run parallel to the upper side 124 of the foot plate 92 and, as shown in FIGS. 3 and 4, define end positions of the sliding bolt 112 which correspond to the active or inactive position of the movable pressure surface segment 60.
  • the sliding pin 112 rests on an end 138, 140 of the elongated holes 130, 132 facing away from the movement axis 82, in which position the support arm 98 keeps the bearing body 80 pivoted so far about the movement axis 82 that the pressure surface segment 60 is in its active position.
  • This active position of the bearing body 80 is supported on the foot plate 92 via the support arm 98, the sliding bolt 112 and the flange plates 134, 136.
  • This position is stable in that the support arm 98, together with an area 142 of the bearing body 80 which extends between the bearing bolts 104, 106 and the movement axis 82, forms a toggle lever mechanism which thereby remains stable that the projection of the position of the bearing bolts 104, 106 on a connecting line between the sliding bolt 112 and the movement axis 82 lies between them, the function of the toggle mechanism presupposing that the movement axis 82 and the bearing bolts 104, 106 and the sliding bolt 112 are aligned parallel to each other in all positions.
  • the support arm 98 can also be moved from its supporting position shown in FIG. 3 to a non-supporting position shown in FIG. 4, in which the sliding bolt 112 lies in a region of the elongated holes 130, 132 closest to the movement axis 82. In this case, the entire bearing body 80 tilts about the movement axis 82 such that the pressure web 58 lowers in the direction of the foot plate 92.
  • the movable pressure surface segment 60 is moved in the direction 74 away from the bending edge 66 and at the same time is also lowered in the direction of the bending cheek 30, so that the movable pressure surface segment 60 in its inactive position faces the underside 72 of the lower jaw tool tip 68.
  • the bearing body 80 In this non-supporting position of the support arm 98, shown in FIG. 4, the bearing body 80 ultimately rests with its underside 144 on the top 124 of the foot plate 92.
  • the slide 118 is provided, which acts on the slide pin 112 and with which the slide pin 112 is displaceable in the elongated holes 130 and 132.
  • the slide 118 can in principle be operated manually. However, it is particularly advantageous if the slide 118 has a slide nose 146 which points upward away from the base plate 92 and which facilitates actuation of the slide 118.
  • a manipulator designated as a whole by 150, is arranged on the upper beam 14 as shown in FIG. 1, which manipulator extends in a transverse direction 152 essentially over the entire width of the upper beam 14 and along it is movable.
  • the manipulator 150 is guided in a manipulator guide 154 on the upper cheek 14 and can be positioned at any point in the transverse direction 152 by means of an adjusting spindle 158 which can be driven by a spindle drive 156.
  • the spindle drive 156 is controlled via the machine control 148 in accordance with an NC axis.
  • the manipulator 150 is in turn provided with an actuating arm 160 which can be pivoted about an axis 162 by means of a drive, not shown, so that the slide lug 146 can be actuated by an end 164 of the actuating arm 160.
  • the end 164 of the actuating arm 160 can be used to engage behind the slider nose 146 of the slider 118, the actuating arm 160 in the direction 166 is to be pivoted toward the slide nose 146 and reaching behind the slide nose 146 is possible in that the bending beam 30, starting from the position shown in FIG.
  • the bearing body 80 can now be pivoted from the active position into the inactive position by moving the slide lug 146 away from the bearing body 80, the sliding bolt 112 being moved from the ends 138 and 140 of the elongated holes 130, 132 moves away into a position close to the movement axis 82, so that - as already described - the entire bearing body 80 tilts around the movement axis 82 and ultimately comes to rest with its underside 144 on the upper side 124 of the foot plate 92.
  • the bending cheek 30 is lowered again by means of the actuator 42 in order to disengage the end 164 of the actuating arm 160 from the slide lug 146.
  • the bending beam 30 is raised to the extent that the Pressure surface segments 50 of the stationary bending beam tool segments 44 are again immediately next to the bending edge 66 and adjacent to the workpiece plane 64 in order to be able to bend the edge region 20a with them, as shown enlarged in FIG. 8.
  • the pressure surface segment 60 which is in the inactive position, is shifted so far in the direction 74 with respect to the bending edge 66 that, starting from the bending starting position shown in dash-dotted lines in FIG can have with the edge region 20b.
  • the pressure web 58 is also in the inactive position such that it also does not come into contact with the edge region 20b of the workpiece 20.
  • the pressure web 58 is always on one side of the workpiece plane 64 without moving through it, so that no collision with the edge region 20b, regardless of the length thereof, can occur.
  • the length of the possible edge region 20b is only determined by the distance from the bending edge 66 of the bearing body 80 in the bending end position shown in solid line in FIG. 8, since part of the bearing body 80 is located during the movement of the bending cheek 30 in the bending pivot direction 38 moved through the workpiece plane 64.
  • FIG. 9a A transfer of the movable pressure surface segment 60 from the inactive position to the active position is shown in FIG. 9, as shown in FIG. 9a.
  • the bending beam 30 is first of all controlled by the machine control 148 by means of the actuator 42 of FIG the pivot axis 36 moves away in the direction 40, so that the pressure surface segment 60 is at a distance from the underside 72 of the lower jaw tool tip 68.
  • the pressure web 58 with the pressure surface segment 60 is seated on a bearing body 80 'which can be pivoted about an axis of movement 82' which, in relation to the center perpendicular 95 to the pressure surface segment 60, is in the opposite direction 170 to the bending pivot direction 38 is arranged offset.
  • the pressure surface segment 60 is moved from the active position (shown in broken lines in FIG. 10) to the inactive position (shown in solid lines in FIG. 10) by moving in the direction of the bending pivot direction 38.
  • the printing surface segment 60 moves along a circular path 172 around the edge region 20b without colliding with it.
  • the other areas of the bending beam tool segment 54 in the inactive position lie outside a free space radius FR defining a free space F around the bending edge 66, provided that they pass through the workpiece plane 64 during the bending operation.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Glass Compositions (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Steroid Compounds (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Secondary Cells (AREA)
  • Inorganic Insulating Materials (AREA)

Abstract

A bending machine has a bottom platen (12) with a bottom platen tool and a top platen (14) with a top platen tool movable with respect to one another to clamp a workpiece, as well as a bending platen (30) that can swivel around a swivelling axis (36) and has bending platen tool segments (44) provided each with a compression surface segment. A bending platen compression surface which presses the workpiece during bending can be composed of the compression surface segments. In order to improve such a bending machine so that the width of the bending platen compression surface may be easily altered, at least one bending platen tool segment is adjustable. In the adjustable bending platen tool segment, the compression surface segment can be moved from an active position in which it adds to the compression surface of the bending platen tool to an inactive position in which it is without effect during a bending operation.

Description

Die Erfindung betrifft eine Biegemaschine umfassend eine Unterwange mit einem Unterwangenwerkzeug, eine Oberwange mit einem Oberwangenwerkzeug, wobei das Oberwangenwerkzeug und das Unterwangenwerkzeug zum Einspannen eines Werkstücks relativ zueinander bewegbar sind, sowie eine um eine Schwenkachse schwenkbare Biegewange mit an dieser angeordneten Biegewangenwerkzeugsegmenten, von denen jedes ein Druckflächensegment aufweist, wobei aus den Druckflächensegmenten eine das Werkstück beim Biegen beaufschlagende Biegewangendruckfläche zusammensetzbar ist.The invention relates to a bending machine comprising a lower beam with a lower beam tool, an upper beam with an upper beam tool, the upper beam tool and the lower beam tool being movable relative to one another for clamping a workpiece, and a bending beam pivotable about a pivot axis with bending beam tool segments arranged thereon, each of which Comprises pressure surface segment, wherein from the pressure surface segments a bending cheek pressure surface acting on the workpiece during bending can be assembled.

Derartige Biegemaschinen sind aus dem Stand der Technik bekannt. Bei diesen erfolgt jeweils vor dem Biegen eines Werkstücks eine Anpassung einer Breite der Biegewangendruckfläche an das jeweilige zu biegende Werkstück dadurch, daß eine entsprechende Zahl von Biegewangenwerkzeugsegmenten auf der Biegewange aufgesetzt wird. Ist es erforderlich, im Verlauf des Biegens eines Werkstücks die Breite der Biegewangendruckfläche zu verändern, so muß stets mindestens ein Biegewangenwerkzeugsegment umgesetzt oder entfernt werden.Bending machines of this type are known from the prior art. In each case, before a workpiece is bent, the width of the bending cheek pressure surface is adapted to the respective workpiece to be bent by placing a corresponding number of bending cheek tool segments on the bending cheek. If it is necessary to change the width of the bending beam pressure surface during the bending of a workpiece, at least one bending beam tool segment must always be moved or removed.

DE-U-9307907 offenbart eine solche Biegemaschine, gemäß dem Oberbegriff des Anspruchs 1DE-U-9307907 discloses such a bending machine according to the preamble of claim 1

Der Erfindung liegt daher die Aufgabe zugrunde, eine Biegemaschine der gattungsgemäßen Art derart zu verbessern, daß ein Wechsel einer Breite der Biegewangendruckfläche in einfacher Art und Weise möglich ist.The invention is therefore based on the object of improving a bending machine of the generic type in such a way that a change in the width of the bending cheek pressure surface is possible in a simple manner.

Diese Aufgabe wird bei einer Biegemaschine der eingangs beschriebenen Art erfindungsgemäß dadurch gelöst, daß mindestens ein Biegewangenwerkzeugsegment mit einem verstellbaren Druckflächensegment versehen ist, daß bei dem Biegewangenwerkzeugsegment das Druckflächensegment von einer aktiven Stellung, in welcher es zur Druckfläche des Biegewangenwerkzeugs beiträgt, in eine inaktive Stellung bewegbar ist, in welcher es bei einer Biegeoperation wirkungslos ist, und daß bei in der inaktiven Stellung stehendem Druckflächensegment alle die Werkstückebene bei einer Biegeoperation durchlaufenden Bereiche des in seiner Position an der Biegewange verbleibenden Biegewangenwerkzeugsegments außerhalb eines durch einen Freiraumradius um die Biegekante definierten Freiraums liegen.This object is achieved according to the invention in a bending machine of the type described in the introduction in that at least one bending beam tool segment is provided with an adjustable pressure surface segment that in the bending beam tool segment the pressure surface segment can be moved from an active position in which it contributes to the pressure surface of the bending beam tool to an inactive position in which it is ineffective during a bending operation, and that in the inactive position standing pressure surface segment, all areas of the bending beam tool segment remaining in their position on the bending beam, which pass through the workpiece plane during a bending operation, lie outside a free space defined by a free space radius around the bending edge.

Der Vorteil der erfindungsgemäßen Lösung ist somit darin zu sehen, daß durch das verstellbare Biegewangenwerkzeugsegment sich das Umsetzen oder Entfernen eines Biegewangenwerkzeugsegments als Ganzes erübrigt, da das verstellbare Biegewangenwerkzeugsegment während des Biegens eines Werkstücks mittels der erforderlichen Biegeoperationen stets in derselben Position auf der Biegewange verbleibt, und somit ein wechselnder Einsatz des verstellbaren Biegewangenwerkzeugsegments, insbesondere im Verlauf der Bearbeitung eines Werkstücks, in einfacher Art und Weise möglich ist, da lediglich ein Bewegen des Druckflächensegments zwischen der aktiven und der inaktiven Stellung erforderlich ist.The advantage of the solution according to the invention is thus to be seen in the fact that the adjustable bending beam tool segment means that there is no need to move or remove a bending beam tool segment as a whole, since the adjustable bending beam tool segment always remains in the same position on the bending beam during the bending of a workpiece by means of the required bending operations, and changing use of the adjustable bending beam tool segment, in particular in the course of machining a workpiece, is thus possible in a simple manner, since only a movement of the pressure surface segment between the active and the inactive position is required.

Hierbei sind alle Bewegungsmöglichkeiten des Druckflächensegments denkbar. Eine besonders günstige Lösung sieht vor, daß das bewegbare Druckflächensegment bezogen auf die aktive Stellung in der inaktiven Stellung in Richtung zur Biegewange hin versetzt angeordnet ist. Diese Lösung erlaubt es, das Druckflächensegment in einfacher Weise in eine inaktive Stellung zu bringen, in welcher eine Wechselwirkung mit dem Werkstück im Verlauf des Biegens vermieden werden kann.All movement possibilities of the printing surface segment are conceivable here. A particularly favorable solution provides for the movable pressure surface segment to be offset in the direction of the bending beam with respect to the active position in the inactive position. This solution allows the printing surface segment to be brought into an inactive position in a simple manner, in which an interaction with the workpiece in the course of the bending can be avoided.

Um sicherzustellen, daß keine Kollision des in der inaktiven Stellung stehenden Biegewangenwerkzeugsegments mit einem innerhalb eines vorgesehenen Freiraums um die Biegekante liegenden Bereichs des Werkstücks erfolgt, ist vorzugsweise vorgesehen, daß sämtliche in der inaktiven Stellung die Werkstückebene bei einem Biegevorgang durchlaufenden Bereiche des Biegewangenwerkzeugsegments außerhalb eines den Freiraum definierenden Freiraumradius um die Biegekante liegen.In order to ensure that there is no collision of the bending beam tool segment which is in the inactive position with an area of the workpiece which is within an intended free space around the bending edge, it is preferred It is provided that all areas of the bending beam tool segment that pass through the workpiece plane in a bending process in the inactive position lie outside a free space radius defining the free space around the bending edge.

Das Druckflächensegment kann prinzipiell in verschiedene Richtungen bewegt werden, um es von der aktiven Stellung in die inaktive Stellung zu bringen. Beispielsweise ist es denkbar das Druckflächensegment in Biegerichtung zu bewegen, um die inaktive Stellung zu erreichen.The pressure surface segment can in principle be moved in different directions in order to bring it from the active position to the inactive position. For example, it is conceivable to move the pressure surface segment in the bending direction in order to reach the inactive position.

Eine besonders vorteilhafte Lösung sieht vor, daß das in der inaktiven Stellung stehende bewegbare Druckflächensegment in einer Biegeausgangsstellung auf einer dem Oberwangenwerkzeug abgewandten Seite einer Unterwangenwerkzeugspitze des Unterwangenwerkzeugs steht. Damit reicht bereits eine geringe Schwenkbewegung des Druckflächensegments aus, um dieses von der aktiven Stellung in die inaktive Stellung zu bringen.A particularly advantageous solution provides that the movable pressure surface segment, which is in the inactive position, is in a bending starting position on a side of a lower jaw tool tip of the lower beam tool facing away from the upper jaw tool. A slight swiveling movement of the pressure surface segment is thus sufficient to bring it from the active position into the inactive position.

Hinsichtlich der Ausbildung des Biegewangenwerkzeugsegments wurden im Zusammenhang mit der bisherigen Erläuterung der einzelnen Ausführungsbeispiele keine näheren Angaben gemacht. So sieht ein vorteilhaftes Ausführungsbeispiel vor, daß das verstellbare Biegewangenwerkzeugsegment ein Fußteil und einen von diesem getragenen, das bewegbare Druckflächensegment tragenden Drucksteg aufweist und daß der Drucksteg gegenüber dem Fußteil bewegbar ist. Durch diese Ausbildung des verstellbaren Biegewangenwerkzeugsegments ist in einfacher Weise eine Bewegung des Druckflächensegments zwischen der aktiven und der inaktiven Stellung realisierbar.With regard to the configuration of the bending beam tool segment, no further details have been given in connection with the previous explanation of the individual exemplary embodiments. An advantageous exemplary embodiment provides that the adjustable bending beam tool segment has a foot part and a pressure web carried by the latter, which carries the movable pressure surface segment, and that the pressure web is movable relative to the foot part. This configuration of the adjustable bending beam tool segment makes it possible to easily move the pressure surface segment between the active and the inactive position.

Um in diesem Fall sicherzustellen, daß der das bewegbare Druckflächensegment tragende Drucksteg beim Biegen nicht in Berührung mit dem Werkstück kommt und dadurch eine unerwünschte Biegung des Werkstücks bewirkt, ist vorzugsweise vorgesehen, daß sich in der inaktiven Stellung des bewegbaren Druckflächensegments der Drucksteg im Verlauf einer Biegeoperation berührungsfrei zu einer Werkstückebene bewegt.In order to ensure in this case that the pressure web carrying the movable pressure surface segment does not come into contact with the workpiece during bending and thereby causes undesired bending of the workpiece, it is preferably provided that the pressure web is in the inactive position of the movable pressure surface segment during the course of a bending operation moved to a workpiece level without contact.

Besonders günstig läßt sich dieses berührungsfreie Bewegen des Druckstegs relativ zur Werkstückebene dadurch erreichen, daß der Drucksteg während der Biegeoperation auf einer Seite der Werkstückebene verbleibt, ohne diese zu berühren.This contact-free movement of the pressure web relative to the workpiece plane can be achieved particularly favorably by the pressure web remaining on one side of the workpiece plane during the bending operation without touching it.

Ein zweckmäßiges Ausführungsbeispiel einer erfindungsgemäßen Lösung sieht vor, daß der Drucksteg beim Bewegen von der aktiven in die inaktive Stellung in Richtung entgegengesetzt zur Biegeschwenkrichtung bewegbar ist, so daß der Drucksteg bezogen auf die aktive Stellung in der inaktiven Stellung entgegengesetzt zur Biegeschwenkrichtung versetzt ist und somit auch bei der Biegeoperation, das heißt einer Bewegung des Druckstegs in Biegeschwenkrichtung, bezogen auf die aktive Stellung hinter dieser her verläuft.An expedient embodiment of a solution according to the invention provides that the pressure web can be moved in the direction opposite to the bending pivot direction when moving from the active into the inactive position, so that the pressure web is offset in relation to the active position in the opposite direction to the bending pivot direction and thus also during the bending operation, that is to say a movement of the pressure web in the direction of the pivoting movement, based on the active position, runs behind it.

Eine günstige Geometrie hinsichtlich der Positionierung des Druckstegs in der inaktiven Stellung läßt sich dann erreichen, wenn der Drucksteg in der Biegeendstellung auf einer der Biegeanfangstellung zugewandten Seite der Werkstückebene steht.A favorable geometry with regard to the positioning of the pressure web in the inactive position can be achieved if the pressure web is in the bending end position on a side of the workpiece plane facing the bending start position.

Da das bewegbare Druckflächensegment in seiner aktiven Stellung unmittelbar neben einer Biegekante des Unterwangen- oder Oberwangenwerkzeugs steht, und ein Verstellen des Biegewangenwerkzeugsegments von der aktiven in die inaktive Stellung zu einer Kollision mit beispielsweise dem Unterwangenwerkzeug führen könnte, ist vorzugsweise vorgesehen, daß die Biegewange relativ zu ihrer Schwenkachse, verschiebbar ist, um zum Bewegen des bewegbaren Druckflächensegments von der aktiven in die inaktive Stellung und umgekehrt ausreichend Raum zu haben.Since the movable pressure surface segment is in its active position immediately next to a bending edge of the lower beam or upper beam tool, and an adjustment of the Bending beam tool segment from the active in the inactive position to a collision with, for example, the lower beam tool, it is preferably provided that the bending beam is displaceable relative to its pivot axis, in order to move the movable pressure surface segment from the active into the inactive position and vice versa to have.

Vorzugsweise wird hierzu die Biegewange relativ zu ihrer Schwenkachse so bewegt, daß sich das verstellbare Biegewangenwerkzeugsegment von der durch das Oberwangenwerkzeug oder das Unterwangenwerkzeug definierten Biegekante entfernt und somit ein ungestörtes Bewegen des bewegbaren Druckflächensegments möglich ist.For this purpose, the bending beam is preferably moved relative to its pivot axis in such a way that the adjustable bending beam tool segment moves away from the bending edge defined by the upper beam tool or the lower beam tool, and thus an undisturbed movement of the movable pressure surface segment is possible.

Im Zusammenhang mit den bislang erläuterten Ausführungsbeispielen der erfindungsgemäßen Lösung wurde lediglich davon ausgegangen, daß der Drucksteg zwischen der aktiven und der inaktiven Stellung hin- und herbewegbar ist, wobei dies beispielsweise auch durch eine Linearbewegung mit einer entsprechend gestalteten Führung realisierbar ist. Eine besonders zweckmäßige erfindungsgemäße Lösung sieht jedoch vor, daß der Drucksteg zwischen der aktiven und der inaktiven Stellung hin- und herschwenkbar ist. Die schwenkbare Ausführung der Verbindung des Druckstegs mit dem Fußteil hat den Vorteil, daß der Drucksteg aufgrund der ständigen Verbindung über die Schwenkachse stabiler und in einfacher Art und Weise festlegbar ist.In connection with the previously described exemplary embodiments of the solution according to the invention, it was only assumed that the pressure web can be moved back and forth between the active and the inactive position, this also being possible, for example, by means of a linear movement with a correspondingly designed guide. A particularly expedient solution according to the invention provides, however, that the pressure web can be pivoted back and forth between the active and the inactive position. The pivotable design of the connection of the pressure bar to the foot part has the advantage that the pressure bar is more stable and can be fixed in a simple manner due to the constant connection via the pivot axis.

Vorzugsweise verläuft die Achse, um die ein Verschwenken erfolgt, parallel zu einer Biegekante.The axis about which pivoting takes place preferably runs parallel to a bending edge.

Besonders zweckmäßig ist es, wenn der Drucksteg gegenüber dem Fußteil um eine zum bewegbaren Druckflächensegment parallele Achse verschwenkbar ist, die auf einer Seite einer Mittelsenkrechten zu dem bewegbaren Druckflächensegment angeordnet ist. Verläuft der Drucksteg ungefähr parallel zur Mittelsenkrechten, so liegt die Achse auch auf einer Seite des Druckstegs. Erfolgt ein Verschwenken von der aktiven in die inaktive Stellung in einer von der Achse weg weisenden Richtung, so wird bei dieser Lösung zusätzlich zu dem Verschwenken des Druckstegs auch noch ein Absenken des Druckflächensegments in Richtung auf die Biegewange erreicht.It is particularly expedient if the pressure web can be pivoted relative to the foot part about an axis parallel to the movable pressure surface segment, which is arranged on one side of a perpendicular to the movable pressure surface segment. If the pressure bar runs approximately parallel to the perpendicular, the axis is also on one side of the pressure bar. If the active to inactive position is pivoted in a direction pointing away from the axis, then in addition to the pivoting of the pressure web, this solution also lowers the pressure surface segment in the direction of the bending beam.

Die Lage der Achse ist besonders günstig, wenn diese auf einer in der Biegeschwenkrichtung vorderen Seite des Druckstegs liegt, da damit das Bewegen des Druckstegs von der aktiven in die inaktive Stellung entgegengesetzt zur Biegeschwenkrichtung erfolgen kann.The position of the axis is particularly favorable if it lies on a front side of the pressure web in the direction of the pivoting swivel, since this allows the pressure web to be moved from the active to the inactive position opposite to the direction of the swivel.

Hinsichtlich der Festlegung des Druckstegs, insbesondere in der aktiven Stellung, wurden bislang keine näheren Angaben gemacht. So sieht eine besonders günstige Lösung vor, daß der Drucksteg durch einen zwischen einer stützenden Stellung und einer nichtstützenden Stellung hin- und herbewegbaren Stützarm in der aktiven Stellung abstützbar ist. Diese Lösung hat den Vorteil, daß sie einerseits einfach zu betätigen ist und andererseits eine stabile Abstützung des Druckstegs in der aktiven Stellung gewährleistet.No details have so far been given regarding the definition of the pressure bridge, particularly in the active position. A particularly favorable solution provides that the pressure web can be supported in the active position by a support arm which can be moved back and forth between a supporting position and a non-supporting position. This solution has the advantage that on the one hand it is easy to operate and on the other hand it ensures stable support of the pressure bar in the active position.

Besonders günstig ist es dabei, wenn der Stützarm an einem Lagerkörper des Druckstegs schwenkbar gelagert ist und der Lagerkörper des Druckstegs zusammen mit dem Stützarm einen Kniehebelmechanismus bildet, welcher den Drucksteg in der aktiven Stellung stabil abstützt.It is particularly advantageous if the support arm is pivotally mounted on a bearing body of the pressure web and the bearing body of the pressure web forms a toggle lever mechanism together with the support arm, which supports the pressure web in a stable manner in the active position.

Um die stützende und nichtstützende Stellung des Stützarms zu definieren, ist vorzugsweise vorgesehen, daß der Stützarm mit seinem freien Ende in einer die stützende und die nichtstützende Stellung vorgebenden Kulisse geführt ist. Dadurch ist insbesondere über die Kulisse die stützende Stellung des Stützarms sowie die Bewegung desselben von der stützenden Stellung zur nichtstützenden Stellung und umgekehrt definiert vorgebbar.In order to define the supporting and non-supporting position of the support arm, it is preferably provided that the support arm is guided with its free end in a setting which specifies the supporting and the non-supporting position. As a result, the support position of the support arm and the movement of the support arm from the support position to the non-support position and vice versa can be predefined in a defined manner.

Hinsichtlich der Möglichkeit der Einwirkung auf den Stützarm, um diesen von der stützenden in die nichtstützende Stellung zu bewegen, wurden bislang keine näheren Angaben gemacht. So sieht eine besonders zweckmäßige Lösung vor, daß der Stützarm durch einen Schieber betätigbar ist.With regard to the possibility of acting on the support arm in order to move it from the supporting to the non-supporting position, no further details have so far been given. A particularly expedient solution provides that the support arm can be actuated by a slide.

Dabei ist vorzugsweise vorgesehen, daß der Schieber auf das in der Kulisse geführte Ende des Stützarms wirkt, um diesen längs der Kulisse zu bewegen.It is preferably provided that the slide acts on the end of the support arm guided in the link to move it along the link.

Im Zusammenhang mit der bislang beschriebenen Lösung wurden keine näheren Angaben gemacht, wie ein Verstellen des verstellbaren Biegewangenwerkzeugsegments erfolgen soll. Beispielsweise wäre es denkbar, das Biegewangenwerkzeugsegment manuell zu verstellen.In connection with the solution described so far, no further details have been given as to how the adjustable bending beam tool segment should be adjusted. For example, it would be conceivable to manually adjust the bending beam tool segment.

Um jedoch innerhalb eines zeitoptimierten Fertigungsablaufs das Biegewangenwerkzeug möglichst schnell und zeitgünstig zwischen der aktiven Stellung des Druckflächensegments und der inaktiven Stellung des Druckflächensegments hin- und herbewegen zu können, ist vorzugsweise ein das verstellbare Biegewangenwerkzeugsegment betätigbarer Manipulator vorgesehen, welcher über eine Maschinensteuerung der Biegemaschine steuerbar ist. Damit kann über die Maschinensteuerung unmittelbar und automatisch ein Verstellen des verstellbaren Biegewangenwerkzeugsegments erfolgen.However, in order to be able to move the bending beam tool back and forth as quickly and cheaply as possible between the active position of the pressure surface segment and the inactive position of the pressure surface segment within a time-optimized production process, one is preferably the adjustable one Bending beam tool segment operable manipulator is provided, which can be controlled via a machine control of the bending machine. This means that the adjustable bending beam tool segment can be adjusted automatically and directly via the machine control.

Um im Fall unterschiedlicher verstellbarer Biegewangenwerkzeugsegmente auf diese einzeln einwirken zu können, ist zweckmäßigerweise vorgesehen, daß der Manipulator parallel zur Biegewange verfahrbar ist und zwar so, daß er jedes auf dieser angeordnete verstellbare Biegewangenwerkzeugsegment erreichen kann.In order to be able to act individually on these in the case of different adjustable bending beam tool segments, it is expediently provided that the manipulator can be moved parallel to the bending beam so that it can reach each adjustable bending beam tool segment arranged on the latter.

Um ein Verstellen des Biegewangenwerkzeugsegments durchführen zu können, ist der Manipulator vorzugsweise mit einem ebenfalls über die Maschinensteuerung steuerbaren Betätigungsarm versehen, welcher mit dem verstellbaren Biegewangenwerkzeugsegment zusammenwirkt, beispielsweise auf dieses zugreift.In order to be able to adjust the bending beam tool segment, the manipulator is preferably provided with an actuating arm, which can also be controlled via the machine control and which interacts with the adjustable bending beam tool segment, for example accessing it.

Der Betätigungsarm kann in unterschiedlichster Art und Weise auf das verstellbare Biegewangenwerkzeugsegment zugreifen. Im einfachsten Fall ist vorgesehen, daß der Betätigungsarm mit dem Schieber des verstellbaren Biegewangenwerkzeugs wechselwirkt, um das bewegbare Druckflächensegment von der inaktiven in die aktive Stellung und umgekehrt zu bewegen.The actuating arm can access the adjustable bending beam tool segment in a wide variety of ways. In the simplest case, it is provided that the actuating arm interacts with the slide of the adjustable bending beam tool in order to move the movable pressure surface segment from the inactive to the active position and vice versa.

Weitere Merkmale und Vorteile der Erfindung sind Gegenstand der nachfolgenden Beschreibung sowie der zeichnerischen Darstellung einiger Ausführungsbeispiele.Further features and advantages of the invention are the subject of the following description and the drawing of some exemplary embodiments.

In der Zeichnung zeigen:

Fig. 1
eine schematische perspektivische Ansicht eines ersten Ausführungsbeispiels einer erfindungsgemäßen Biegemaschine bei fehlendem rechtem Teil eines Maschinengestells;
Fig. 2
eine vergrößerte ausschnittsweise Darstellung einer Biegewange mit Biegewangenwerkzeug und einer Oberwange mit Oberwangenwerkzeug und einem am Oberwangenwerkzeug durch ein nicht anliegend dargestelltes Unterwangenwerkzeug gehaltenen Werkstück des ersten Ausführungsbeispiels;
Fig. 3
einen Querschnitt durch ein Unterwangenwerkzeug und ein verstellbares Biegewangenwerkzeugsegment des ersten Ausführungsbeispiels in seiner aktiven Stellung;
Fig. 4
einen Querschnitt ähnlich Fig. 3 bei in inaktiver Stellung stehendem verstellbaren Biegewangenwerkzeugsegment;
Fig. 5
eine perspektivische Darstellung eines erfindungsgemäß verstellbaren Biegewangenwerkzeugsegments des ersten Ausführungsbeispiels;
Fig. 6
eine Explosionsdarstellung des Biegewangenwerkzeugsegments gemäß Fig. 5;
Fig. 7
einen Schnitt ähnlich Fig. 3 mit Darstellung eines Überführens des verstellbaren Biegewangenwerkzeugsegments von der aktiven Stellung gemäß Fig. 7a in die inaktive Stellung gemäß Fig. 7e;
Fig. 8
einen Schnitt ähnlich Fig. 3 durch das Unterwangenwerkzeug, das Oberwangenwerkzeug und ein verstellbares Biegewangenwerkzeugsegment in inaktiver Stellung im Verlauf einer Biegeoperation;
Fig. 9
eine Darstellung ähnlich Fig. 4 mit Darstellung eines Überführens des verstellbaren Biegewangenwerkzeugsegments von der inaktiven Stellung gemäß Fig. 9a in die aktive Stellung gemäß Fig. 9d und
Fig. 10
einen Schnitt ähnlich Fig. 8 durch ein zweites Ausführungsbeispiel einer erfindungsgemäßen Biegemaschine, wobei das Biegewangenwerkzeugsegment sowohl in der Biegeausgangsstellung als auch in der Biegeendstellung dargestellt ist.
The drawing shows:
Fig. 1
a schematic perspective view of a first embodiment of a bending machine according to the invention in the absence of the right part of a machine frame;
Fig. 2
an enlarged fragmentary representation of a bending beam with bending beam tool and an upper beam with upper beam tool and a workpiece held on the upper beam tool by a lower beam tool not shown, of the first embodiment;
Fig. 3
a cross section through a lower beam tool and an adjustable bending beam tool segment of the first embodiment in its active position;
Fig. 4
3 shows a cross section similar to FIG. 3 with the adjustable bending beam tool segment in the inactive position;
Fig. 5
a perspective view of a bending beam tool segment adjustable according to the invention of the first embodiment;
Fig. 6
an exploded view of the bending beam tool segment according to FIG. 5;
Fig. 7
3 shows a section similar to FIG. 3, showing a transfer of the adjustable bending beam tool segment from the active position according to FIG. 7a to the inactive position according to FIG. 7e;
Fig. 8
a section similar to Figure 3 through the lower beam tool, the upper beam tool and an adjustable bending beam tool segment in the inactive position in the course of a bending operation.
Fig. 9
4 shows a representation of a transfer of the adjustable bending beam tool segment from the inactive position according to FIG. 9a into the active position according to FIGS. 9d and
Fig. 10
a section similar to FIG. 8 through a second embodiment of a bending machine according to the invention, the bending beam tool segment being shown both in the bending starting position and in the bending end position.

Ein in Fig. 1 schematisch dargestelltes Ausführungsbeispiel einer erfindungsgemäßen Biegemaschine umfaßt ein Maschinengestell 10, mit welchem eine Unterwange 12 fest verbunden ist. Ferner ist an dem Maschinengestell 10 eine Oberwange 14 um eine Schwenkachse 16 schwenkbar gelagert und dadurch in einer Richtung 18 auf die Unterwange 12 zu oder von dieser weg bewegbar, um ein als Ganzes mit 20 bezeichnetes Werkstück, beispielsweise ein Blechteil, zum Biegen einzuspannen.An exemplary embodiment of a bending machine according to the invention, shown schematically in FIG. 1, comprises a machine frame 10 with which a lower beam 12 is fixedly connected. Furthermore, an upper beam 14 is mounted on the machine frame 10 so as to be pivotable about a pivot axis 16 and thus in Movable in a direction 18 toward or away from the lower beam 12 in order to clamp a workpiece, designated as a whole as 20, for example a sheet metal part, for bending.

Zum Biegen des Werkstücks 20 ist die Unterwange 12 mit einem Unterwangenwerkzeug 22 versehen und die Oberwange 14 mit einem Oberwangenwerkzeug 24, welches vorzugsweise aus einer Vielzahl von Oberwangenwerkzeugsegmenten 26 aufgebaut ist, um das Oberwangenwerkzeug 24 hinsichtlich seiner Breite B flexibel gestalten zu können.For bending the workpiece 20, the lower beam 12 is provided with a lower beam tool 22 and the upper beam 14 with an upper beam tool 24, which is preferably constructed from a plurality of upper beam tool segments 26, in order to be able to make the upper beam tool 24 flexible in terms of its width B.

Zum Biegen des Werkstücks 20 wird dieses, wie in Fig. 1 und 2 dargestellt, zwischen das Unterwangenwerkzeug 22 und das Oberwangenwerkzeug 24 gelegt und durch Bewegen des Oberwangenwerkzeugs 24 mitsamt der Oberwange 14 in Richtung 18 auf die Unterwange 12 zu zwischen dem Unterwangenwerkzeug 22 und dem Oberwangenwerkzeug 24 eingespannt.To bend the workpiece 20, as shown in FIGS. 1 and 2, it is placed between the lower beam tool 22 and the upper beam tool 24 and by moving the upper beam tool 24 together with the upper beam 14 in the direction 18 towards the lower beam 12 between the lower beam tool 22 and the Upper beam tool 24 clamped.

Um nun einen in Fig. 1 und 2 mit 20a bezeichneten Randbereich des Werkstücks 20 längs einer in Fig. 1 und 2 gestrichelt eingezeichneten Biegelinie 28 umzubiegen, ist eine als Ganzes mit 30 bezeichnete Biegewange vorgesehen, welche ein als Ganzes mit 32 bezeichnetes Biegewangenwerkzeug trägt.In order to bend an edge region of the workpiece 20 designated by 20a in FIGS. 1 and 2 along a bending line 28 shown in dashed lines in FIGS. 1 and 2, a bending beam designated as a whole with 30 is provided, which carries a bending beam tool designated as a whole with 32.

Die Biegewange 30 ist dabei ihrerseits an auf gegenüberliegenden Seiten derselben angeordneten Biegewangenarmen 34 gelagert, wobei die Biegewangenarme 34 um eine Schwenkachse 36 schwenkbar an dem Maschinengestell 10 gelagert sind. Dadurch ist die gesamte Biegewange 30 um die Schwenkachse 36 in einer Biegeschwenkrichtung 38 bewegbar, wobei diese Bewegung durch einen in Fig. 1 zeichnerisch nicht dargestellten Antrieb erfolgt.The bending beam 30 is in turn supported on the bending beam arms 34 arranged on opposite sides thereof, the bending beam arms 34 being mounted on the machine frame 10 so as to be pivotable about a pivot axis 36. As a result, the entire bending beam 30 can be moved about the pivot axis 36 in a bending pivot direction 38, this movement taking place by means of a drive not shown in the drawing in FIG. 1.

Zusätzlich ist die Biegewange 30 nicht fest an den Biegewangenarmen 34 gehalten, sondern in einer Richtung 40 linear bewegbar, wobei die Richtung 40 ungefähr parallel zur Längsrichtung der Biegewangenarme 34 und parallel zu einer radialen Richtung zur Schwenkachse 36 verläuft. Hierdurch ist die gesamte Biegewange 30 in ihrer in Fig. 1 dargestellten Biegeausgangsstellung relativ zu dem zwischen dem Unterwangenwerkzeug 22 und dem Oberwangenwerkzeug 24 eingespannten Werkstück 20 verstellbar. Die Verstellung erfolgt dabei vorzugsweise über einen in den Biegewangenarmen 34 angeordneten Stellantrieb 42, welcher im einfachsten Fall als Zylinder ausgebildet ist, mit welchem die Biegewange 30 relativ zu den Biegewangenarmen 34 zwischen einer oberen Stellung und einer unteren Stellung bewegbar ist.In addition, the bending beam 30 is not held firmly on the bending beam arms 34, but can be moved linearly in a direction 40, the direction 40 running approximately parallel to the longitudinal direction of the bending beam arms 34 and parallel to a radial direction to the pivot axis 36. As a result, the entire bending beam 30 in its starting position shown in FIG. 1 is adjustable relative to the workpiece 20 clamped between the lower beam tool 22 and the upper beam tool 24. The adjustment is preferably carried out via an actuator 42 arranged in the bending beam arms 34, which in the simplest case is designed as a cylinder with which the bending beam 30 can be moved relative to the bending beam arms 34 between an upper position and a lower position.

Um das Biegewangenwerkzeug 32 an unterschiedliche Breiten B des Werkstücks 20, insbesondere des zwischen Randbereichen 20b liegenden und gegenüber diesen zurückgesetzten Randbereichs 20a, anpassen zu können, ist das Biegewangenwerkzeug 32, wie in Fig. 1 und 2 dargestellt, aus einer Vielzahl von stationären Biegewangenwerkzeugsegmenten 44 aufgebaut, welche auswechselbar auf der Biegewange 30 montiert sind. Jedes dieser stationären Biegewangenwerkzeugsegmente 44 umfaßt ein Fußteil 46, mit welchem dieses auf der Biegewange 30 aufsitzt sowie einen Drucksteg 48, welcher stationär an dem Fußteil 46 gehalten ist und endseitig ein ebenfalls relativ zum Fußteil 46 stationäres Druckflächensegment 50 bildet, wobei die Druckflächensegmente 50 zur Bildung einer zusammengesetzten Biegewangendruckfläche 52 des Biegewangenwerkzeugs 32 beitragen.In order to be able to adapt the bending beam tool 32 to different widths B of the workpiece 20, in particular the edge region 20a lying between and offset from edge regions 20b, the bending beam tool 32, as shown in FIGS. 1 and 2, consists of a plurality of stationary bending beam tool segments 44 constructed, which are interchangeably mounted on the bending beam 30. Each of these stationary bending beam tool segments 44 comprises a foot part 46 with which it rests on the bending cheek 30 and a pressure web 48 which is held stationary on the foot part 46 and forms a pressure surface segment 50 which is likewise stationary relative to the foot part 46, the pressure surface segments 50 forming contribute to a composite bending beam pressure surface 52 of the bending beam tool 32.

Zusätzlich zu den stationären Biegewangenwerkzeugsegmenten 44 sind auf der Biegewange 30 noch weitere auswechselbar montierte, jedoch verstellbare Biegewangenwerkzeugsegmente 54 vorgesehen, welche ebenfalls ein Fußteil 56 umfassen und einen Drucksteg 58, der endseitig ein relativ zum Fußteil 56 bewegbares Druckflächensegment 60 trägt. Je nach Einstellung des verstellbaren Biegewangenwerkzeugsegments 54 tragen die bewegbaren Druckflächensegmente 60 zur Bildung der Druckfläche 52 des Biegewangenwerkzeugs 32 bei oder nicht, wobei sich das Biegewangenwerkzeug 32 aus der Summe der stationären Biegewangenwerkzeugsegmente 44 und den verstellbaren Biegewangenwerkzeugsegmenten 54 zusammensetzt. Vorzugsweise sind dabei die Biegewangenwerkzeugsegmente 54 seitlich eines stationären Biegewangenwerkzeugabschnitts 62 angeordnet, der aus sämtlichen stationären Biegewangenwerkzeugsegmenten 44 aufgebaut ist. Die verstellbaren Biegewangenwerkzeugsegmente 54 dienen in diesem Fall zunächst dazu, in ihrer aktiven Stellung die Randbereiche 20b umzubiegen, wobei in diesem Fall der stationäre Biegewangenwerkzeugabschnitt 62 ohne Biegeaufgabe mitbewegt wird, und anschließend in ihrer inaktiven Stellung dazu, den Randbereich 20a umzubiegen, welcher zwischen seitlichen Randbereichen 20b des Werkstücks 20 liegt, ohne die seitlichen Randbereiche 20b des Werkstücks 20 zu tangieren und ohne die Biegewangenwerkzeugsegmente 54 demontieren zu müssen.In addition to the stationary bending beam tool segments 44, further interchangeably mounted, but adjustable bending beam tool segments 54 are also provided on the bending beam 30, which likewise comprise a foot part 56 and a pressure web 58, which carries a pressure surface segment 60 that can be moved relative to the foot part 56. Depending on the setting of the adjustable bending beam tool segment 54, the movable pressure surface segments 60 contribute to the formation of the pressure surface 52 of the bending beam tool 32 or not, the bending beam tool 32 being composed of the sum of the stationary bending beam tool segments 44 and the adjustable bending beam tool segments 54. The bending beam tool segments 54 are preferably arranged on the side of a stationary bending beam tool section 62 which is constructed from all the stationary bending beam tool segments 44. In this case, the adjustable bending beam tool segments 54 first serve to bend the edge regions 20b in their active position, in which case the stationary bending beam tool section 62 is also moved without a bending task, and then in their inactive position to bend the edge region 20a, which lies between lateral edge regions 20b of the workpiece 20 lies without touching the lateral edge regions 20b of the workpiece 20 and without having to dismantle the bending beam tool segments 54.

Zum Umbiegen der Randbereiche 20b sind die verstellbaren Biegewangenwerkzeugsegmente 54 so anzuordnen, daß deren bewegbare Druckflächensegmente 60 beim Verschwenken der Biegewange 30 um die Schwenkachse 16 auf die äußeren Randbereiche 20b des Werkstücks wirken und - wie im Ausführungsbeispiel dargestellt - diese äußeren Randbereiche 20b des Werkstücks 20 umbiegen, während der Randbereich 20a dadurch, daß er beispielsweise gegenüber den Randbereichen 20b zurückgesetzt ist, nicht im Arbeitsbereich des Biegewangenwerkzeugs 32 liegt. Hierzu steht das bewegbare Druckflächensegment 60, wie in Fig. 3 dargestellt, in seiner aktiven Stellung, in welcher es beim Verschwenken der Biegewange 30 um die Schwenkachse 16 auf den Randbereich 20b wirkt.To bend the edge regions 20b, the adjustable bending beam tool segments 54 are to be arranged such that their movable pressure surface segments 60 act on the outer edge regions 20b of the workpiece when the bending beam 30 is pivoted about the pivot axis 16 and - as shown in the exemplary embodiment - these outer edge regions 20b of the workpiece Bend the workpiece 20 while the edge area 20a is not in the working area of the bending beam tool 32 because it is set back, for example, from the edge areas 20b. For this purpose, the movable pressure surface segment 60, as shown in FIG. 3, is in its active position, in which it acts on the edge region 20b when the bending beam 30 is pivoted about the pivot axis 16.

Das bewegbare Druckflächensegment 60 ist, wie in Fig. 4 dargestellt, in eine inaktive Stellung bringbar, in welcher dieses nicht auf ein zwischen dem Unterwangenwerkzeug 22 und dem Oberwangenwerkzeug 24 eingespanntes Werkstück 20 wirkt. Hierzu ist vorzugsweise das bewegbare Druckflächensegment 60 aus seiner aktiven Stellung, in welcher dieses unmittelbar an eine Werkstückebene 64 angrenzt und seitlich neben einer eine Biegekante 66 zusammen mit einer Oberwangenwerkzeugspitze 67 definierenden Unterwangenwerkzeugspitze 68 liegt, in eine inaktive Stellung bringbar, in welcher das bewegbare Druckflächensegment 60 einer einer Spannfläche 70 der Unterwangenwerkzeugspitze 68 abgewandten Unterseite 72 der Unterwangenwerkzeugspitze 68 zugewandt steht und somit relativ zu der Biegekante 66 in einer zur Biegeschwenkrichtung 38 entgegengesetzten Richtung 74 versetzt angeordnet ist.As shown in FIG. 4, the movable pressure surface segment 60 can be brought into an inactive position, in which it does not act on a workpiece 20 clamped between the lower beam tool 22 and the upper beam tool 24. For this purpose, the movable pressure surface segment 60 can preferably be brought into an inactive position from its active position, in which it directly adjoins a workpiece plane 64 and lies laterally next to a lower jaw tool tip 68 defining a bending edge 66 together with an upper beam tool tip 67, in which the movable pressure surface segment 60 is facing a lower surface 72 of the lower jaw tool tip 68 facing away from a clamping surface 70 of the lower jaw tool tip 68 and is thus offset relative to the bending edge 66 in a direction 74 opposite to the bending pivot direction 38.

Um das Druckflächensegment 60 von der aktiven Stellung, dargestellt in Fig. 3, in die inaktive Stellung, dargestellt in Fig. 4, bewegen zu können, umfaßt das verstellbare Biegewangenwerkzeugsegment 54, wie in Fig. 5 und Fig. 6 vergrößert dargestellt, einen am Drucksteg 58 angeformten Lagerkörper 80, an dessen gegenüberliegenden Seiten zwei koaxial zu einer Bewegungsachse 82 angeordnete Lagerbolzen 84, 86 aufgenommen sind. Die Lagerbolzen 84, 86 greifen dabei in Lagerflansche 88, 90 des Fußteils 56 ein, die von einer Fußplatte 92 des Fußteils 56 nach oben in Richtung des Lagerkörpers 80 überstehen. Die Bewegungsachse 82 liegt dabei auf einer in Biegeschwenkrichtung 38 weisenden Seite 94 des Lagerkörpers 80, während der Drucksteg 58 an einen der Seite 94 gegenüberliegenden Bereich 93 des Lagerkörpers 80 angeformt ist und sich von diesem erhebt. Damit ist die Bewegungsachse 82 bezüglich einer Mittelsenkrechten 95 des Druckflächensegments 60 in Richtung der Biegeschwenkrichtung 38 versetzt angeordnet.In order to be able to move the pressure surface segment 60 from the active position, shown in FIG. 3, to the inactive position, shown in FIG. 4, the adjustable bending beam tool segment 54, as shown enlarged in FIGS. 5 and 6, comprises an am Pressure web 58 integrally formed bearing body 80, on the opposite sides of which two bearing bolts 84, 86 arranged coaxially to an axis of movement 82 are received are. The bearing bolts 84, 86 engage in bearing flanges 88, 90 of the foot part 56, which project upwards from a foot plate 92 of the foot part 56 in the direction of the bearing body 80. The axis of movement 82 lies on a side 94 of the bearing body 80 pointing in the direction of the pivoting movement 38, while the pressure web 58 is formed on an area 93 of the bearing body 80 opposite the side 94 and rises from the latter. The movement axis 82 is thus arranged offset with respect to a central perpendicular 95 of the pressure surface segment 60 in the direction of the bending pivot direction 38.

Ferner weist der Lagerkörper 80 noch eine ungefähr mittig liegende Aussparung 96 auf, in welcher ein Stützarm 98 angeordnet ist, der zwei nebeneinanderliegende Hebel 100, 102 umfaßt, von denen jeder mittels eines Lagerbolzens 104, 106 schwenkbar in einer entsprechenden Aufnahme 108, 110 im Lagerkörper 80 gelagert ist, wobei die Aufnahmen 108 und 110 sich beiderseits der Aussparung 96 in den Lagerkörper 80 hinein erstrecken.Furthermore, the bearing body 80 has an approximately central recess 96, in which a support arm 98 is arranged, which comprises two adjacent levers 100, 102, each of which is pivotable by means of a bearing bolt 104, 106 in a corresponding receptacle 108, 110 in the bearing body 80 is mounted, the receptacles 108 and 110 extending into the bearing body 80 on both sides of the recess 96.

Ausgehend von den die Schwenklager bildenden Lagerbolzen 104, 106 erstrecken sich die beiden Hebel 100, 102 zu einem gemeinsamen Schiebebolzen 112 und sind ebenfalls an diesem mit ihrem dem jeweiligen Lagerbolzen 104 bzw. 106 gegenüberliegenden Endbereich 114 bzw. 116 drehbar gelagert. Der Schiebebolzen 112 sitzt dabei an einem Schieber 118, welcher vorzugsweise mittig zwischen den beiden Hebeln 100, 102 liegt, so daß sich der Schiebebolzen 112 durch den Schieber 118 hindurch und beiderseits desselben zur Lagerung der Endbereiche 114, 116 der Hebel 100, 102 erstreckt.Starting from the bearing bolts 104, 106 forming the pivot bearings, the two levers 100, 102 extend to a common sliding bolt 112 and are also rotatably mounted thereon with their end regions 114 and 116 opposite the respective bearing bolts 104 and 106, respectively. The sliding pin 112 is seated on a slide 118, which is preferably located centrally between the two levers 100, 102, so that the sliding pin 112 extends through the slide 118 and on both sides thereof for mounting the end regions 114, 116 of the levers 100, 102.

Der Schieber 118 ist dabei in einem Führungsschlitz 120 des Lagerkörpers 80 geführt, wobei der Führungsschlitz 120 von der Seite 94 ausgehend sich durch den Lagerkörper 80 hindurcherstreckt und in die Aussparung 96 einmündet. Ferner ist der Schieber 118 noch mit seiner Unterseite 122 auf einer Oberseite 124 der Fußplatte 92 aufliegend geführt.The slider 118 is guided in a guide slot 120 of the bearing body 80, the guide slot 120 extending from the side 94 extending through the bearing body 80 and opening into the recess 96. Furthermore, the slide 118 is guided with its underside 122 resting on an upper side 124 of the foot plate 92.

Der Schiebebolzen 112 erstreckt sich vom Schieber 118 durch die Hebel 100, 102 und über diese hinaus und ist jeweils mit seinen äußeren Enden 126, 128 in Längsführungen für diese bildenden Langlöchern 130, 132 geführt, welche in Flanschplatten 134, 136 angeordnet sind, die sich von der Fußplatte 92 erheben und fest mit dieser verbunden sind.The sliding pin 112 extends from the slide 118 through the levers 100, 102 and beyond and is in each case guided with its outer ends 126, 128 in longitudinal guides for these elongated holes 130, 132, which are arranged in flange plates 134, 136 which are arranged rise from the foot plate 92 and are firmly connected to it.

Die Langlöcher 130 bzw. 132 verlaufen vorzugsweise parallel zu der Oberseite 124 der Fußplatte 92 und definieren, wie in Fig. 3 und Fig. 4 dargestellt, Endlagen des Schiebebolzens 112, welche der aktiven bzw. inaktiven Stellung des bewegbaren Druckflächensegments 60 entsprechen.The elongated holes 130 and 132 preferably run parallel to the upper side 124 of the foot plate 92 and, as shown in FIGS. 3 and 4, define end positions of the sliding bolt 112 which correspond to the active or inactive position of the movable pressure surface segment 60.

In der in Fig. 3 dargestellten Endlage liegt der Schiebebolzen 112 an einem der Bewegungsachse 82 abgewandten Ende 138, 140 der Langlöcher 130, 132 an, wobei in dieser Stellung der Stützarm 98 den Lagerkörper 80 um die Bewegungsachse 82 soweit verschwenkt hält, daß das Druckflächensegment 60 in seiner aktiven Stellung steht. Diese aktive Stellung des Lagerkörpers 80 ist über den Stützarm 98, den Schiebebolzen 112 sowie die Flanschplatten 134, 136 an der Fußplatte 92 abgestützt. Diese Stellung ist dadurch stabil, daß der Stützarm 98 zusammen mit einem zwischen den Lagerbolzen 104, 106 und der Bewegungsachse 82 sich erstreckenden Bereich 142 des Lagerkörpers 80 einen Kniehebelmechanismus bildet, der dadurch stabil stehen bleibt, daß die Projektion der Lage der Lagerbolzen 104, 106 auf eine Verbindungslinie zwischen dem Schiebebolzen 112 und der Bewegungsachse 82 zwischen diesen liegt, wobei die Funktion des Kniehebelmechanismus voraussetzt, daß die Bewegungsachse 82 sowie die Lagerbolzen 104, 106 und der Schiebebolzen 112 in allen Stellungen parallel zueinander ausgerichtet sind.In the end position shown in FIG. 3, the sliding pin 112 rests on an end 138, 140 of the elongated holes 130, 132 facing away from the movement axis 82, in which position the support arm 98 keeps the bearing body 80 pivoted so far about the movement axis 82 that the pressure surface segment 60 is in its active position. This active position of the bearing body 80 is supported on the foot plate 92 via the support arm 98, the sliding bolt 112 and the flange plates 134, 136. This position is stable in that the support arm 98, together with an area 142 of the bearing body 80 which extends between the bearing bolts 104, 106 and the movement axis 82, forms a toggle lever mechanism which thereby remains stable that the projection of the position of the bearing bolts 104, 106 on a connecting line between the sliding bolt 112 and the movement axis 82 lies between them, the function of the toggle mechanism presupposing that the movement axis 82 and the bearing bolts 104, 106 and the sliding bolt 112 are aligned parallel to each other in all positions.

Der Stützarm 98 kann ferner von seiner in Fig. 3 dargestellten stützenden Stellung in eine in Fig. 4 dargestellte nichtstützende Stellung bewegt werden, in welcher der Schiebebolzen 112 in einem der Bewegungsachse 82 nächstliegenden Bereich der Langlöcher 130, 132 liegt. In diesem Fall kippt der gesamte Lagerkörper 80 um die Bewegungsachse 82 dergestalt, daß sich der Drucksteg 58 in Richtung der Fußplatte 92 hin absenkt.The support arm 98 can also be moved from its supporting position shown in FIG. 3 to a non-supporting position shown in FIG. 4, in which the sliding bolt 112 lies in a region of the elongated holes 130, 132 closest to the movement axis 82. In this case, the entire bearing body 80 tilts about the movement axis 82 such that the pressure web 58 lowers in the direction of the foot plate 92.

Dadurch wird das bewegbare Druckflächensegment 60 in der Richtung 74 von der Biegekante 66 weg bewegt und gleichzeitig auch noch in Richtung der Biegewange 30 abgesenkt, so daß das bewegbare Druckflächensegment 60 in seiner inaktiven Stellung der Unterseite 72 der Unterwangenwerkzeugspitze 68 zugewandt steht. In dieser nichtstützenden Stellung des Stützarms 98, dargestellt in Fig. 4, liegt letztlich der Lagerkörper 80 mit seiner Unterseite 144 auf der Oberseite 124 der Fußplatte 92 auf.As a result, the movable pressure surface segment 60 is moved in the direction 74 away from the bending edge 66 and at the same time is also lowered in the direction of the bending cheek 30, so that the movable pressure surface segment 60 in its inactive position faces the underside 72 of the lower jaw tool tip 68. In this non-supporting position of the support arm 98, shown in FIG. 4, the bearing body 80 ultimately rests with its underside 144 on the top 124 of the foot plate 92.

Um den Stützarm 98 von seiner nichtstützenden Stellung in die stützende Stellung und umgekehrt zu bewegen, ist der Schieber 118 vorgesehen, welcher auf den Schiebebolzen 112 wirkt und mit welchem der Schiebebolzen 112 in den Langlöchern 130 und 132 verschiebbar ist.In order to move the support arm 98 from its non-support position to the support position and vice versa, the slide 118 is provided, which acts on the slide pin 112 and with which the slide pin 112 is displaceable in the elongated holes 130 and 132.

Der Schieber 118 ist prinzipiell manuell betätigbar. Besonders vorteilhaft ist es jedoch, wenn der Schieber 118 eine von der Fußplatte 92 weg nach oben weisende Schiebernase 146 aufweist, welche ein Betätigen des Schiebers 118 erleichtert.The slide 118 can in principle be operated manually. However, it is particularly advantageous if the slide 118 has a slide nose 146 which points upward away from the base plate 92 and which facilitates actuation of the slide 118.

Um den Schieber 118 über eine Maschinensteuerung 148 betätigen zu können, ist wie in Fig. 1 dargestellt, an der Oberwange 14 ein als Ganzes mit 150 bezeichneter Manipulator angeordnet, welcher in einer Querrichtung 152 im wesentlichen über die gesamte Breite der Oberwange 14 und längs derselben bewegbar ist. Hierzu ist der Manipulator 150 in einer Manipulatorführung 154 an der Oberwange 14 geführt und mittels einer durch einen Spindelantrieb 156 antreibbaren Stellspindel 158 in der Querrichtung 152 an beliebiger Stelle definiert positionierbar. Dabei wird der Spindelantrieb 156 über die Maschinensteuerung 148 entsprechend einer NC-Achse angesteuert.In order to be able to operate the slide 118 via a machine control 148, a manipulator, designated as a whole by 150, is arranged on the upper beam 14 as shown in FIG. 1, which manipulator extends in a transverse direction 152 essentially over the entire width of the upper beam 14 and along it is movable. For this purpose, the manipulator 150 is guided in a manipulator guide 154 on the upper cheek 14 and can be positioned at any point in the transverse direction 152 by means of an adjusting spindle 158 which can be driven by a spindle drive 156. The spindle drive 156 is controlled via the machine control 148 in accordance with an NC axis.

Der Manipulator 150 ist seinerseits mit einem Betätigungsarm 160 versehen, welcher mittels eines nicht dargestellten Antriebs um eine Achse 162 verschwenkbar ist, so daß die Schiebernase 146 durch ein Ende 164 des Betätigungsarms 160 betätigbar ist.The manipulator 150 is in turn provided with an actuating arm 160 which can be pivoted about an axis 162 by means of a drive, not shown, so that the slide lug 146 can be actuated by an end 164 of the actuating arm 160.

Wie in Fig. 7a bis 7e illustriert, besteht ausgehend von der in Fig. 7a dargestellten aktiven Stellung des bewegbaren Druckflächensegments 60 die Möglichkeit, mit dem Ende 164 des Betätigungsarms 160 die Schiebernase 146 des Schiebers 118 zu hintergreifen, wobei der Betätigungsarm 160 in Richtung 166 auf die Schiebernase 146 zu zu verschwenken ist und ein Hintergreifen der Schiebernase 146 dadurch möglich ist, daß die Biegewange 30 ausgehend von der in Fig. 7a dargestellten Stellung soweit von der Schwenkachse 36 weg in Richtung 40 abgesenkt wird, daß das Ende 164 des Betätigungsarms 160 zwischen der Schiebernase 146 und dem Drucksteg 58 des Biegewangenwerkzeugsegments 54 positionierbar ist, und anschließend die Biegewange 30 wieder soweit angehoben werden muß, daß das Ende 164 in der Lage ist, auf die Schiebernase 146 einzuwirken. In der angehobenen Stellung steht, wie in Fig. 7b strichpunktiert dargestellt, allerdings die Biegewange 30 so, daß das Druckflächensegment 60 einen Abstand von der Werkstückebene 64 aufweist. Das Bewegen der Biegewange 30 in Richtung 40 und entgegengesetzt dazu erfolgt dabei über den in Fig. 1 schematisch dargestellten Stellantrieb 42, gesteuert durch die Maschinensteuerung 148.As illustrated in FIGS. 7a to 7e, starting from the active position of the movable pressure surface segment 60 shown in FIG. 7a, the end 164 of the actuating arm 160 can be used to engage behind the slider nose 146 of the slider 118, the actuating arm 160 in the direction 166 is to be pivoted toward the slide nose 146 and reaching behind the slide nose 146 is possible in that the bending beam 30, starting from the position shown in FIG. 7 a, is lowered so far away from the pivot axis 36 in the direction 40 that the end 164 of the actuating arm 160 can be positioned between the slide lug 146 and the pressure web 58 of the bending beam tool segment 54, and then the bending beam 30 must be raised again so far that the end 164 is able to act on the slide lug 146. In the raised position, as shown in dash-dotted lines in FIG. 7b, however, the bending beam 30 is such that the pressure surface segment 60 is at a distance from the workpiece plane 64. Moving the bending beam 30 in the direction 40 and in the opposite direction takes place via the actuator 42 shown schematically in FIG. 1, controlled by the machine control 148.

In der in Fig. 7b strichpunktiert gezeichneten Stellung der Biegewange 30 kann nun durch Bewegen der Schiebernase 146 vom Lagerkörper 80 weg der Lagerkörper 80 von der aktiven Stellung in die inaktive Stellung geschwenkt werden, wobei der Schiebebolzen 112 von den Enden 138 bzw. 140 der Langlöcher 130, 132 weg in eine der Bewegungsachse 82 nahegelegene Position wandert, so daß - wie bereits beschrieben-der gesamte Lagerkörper 80 um die Bewegungsachse 82 kippt und letztlich mit seiner Unterseite 144 auf der Oberseite 124 der Fußplatte 92 zur Auflage kommt.In the position of the bending beam 30 shown in dash-dotted lines in FIG. 7b, the bearing body 80 can now be pivoted from the active position into the inactive position by moving the slide lug 146 away from the bearing body 80, the sliding bolt 112 being moved from the ends 138 and 140 of the elongated holes 130, 132 moves away into a position close to the movement axis 82, so that - as already described - the entire bearing body 80 tilts around the movement axis 82 and ultimately comes to rest with its underside 144 on the upper side 124 of the foot plate 92.

Danach erfolgt, wie in Fig. 7d dargestellt, ein erneutes Absenken der Biegewange 30 mittels des Stellantriebs 42, um das Ende 164 des Betätigungsarms 160 mit der Schiebernase 146 außer Eingriff zu bringen. Anschließend erfolgt, wie in Fig. 7e dargestellt, ein Anheben der Biegewange 30 soweit, daß die Druckflächensegmente 50 der stationären Biegewangenwerkzeugsegmente 44 wieder unmittelbar neben der Biegekante 66 und angrenzend an die Werkstückebene 64 stehen, um mit diesen ein Biegen des Randbereichs 20a durchführen zu können, wie vergrößert in Fig. 8 dargestellt.Then, as shown in FIG. 7d, the bending cheek 30 is lowered again by means of the actuator 42 in order to disengage the end 164 of the actuating arm 160 from the slide lug 146. Then, as shown in Fig. 7e, the bending beam 30 is raised to the extent that the Pressure surface segments 50 of the stationary bending beam tool segments 44 are again immediately next to the bending edge 66 and adjacent to the workpiece plane 64 in order to be able to bend the edge region 20a with them, as shown enlarged in FIG. 8.

Das in der inaktiven Stellung stehende Druckflächensegment 60 ist dabei gegenüber der Biegekante 66 soweit in der Richtung 74 verschoben, daß ausgehend von der in Fig. 8 strichpunktiert dargestellten Biegeausgangsstellung während der gesamten Biegeoperation unter Bewegen der Biegewange 30 in der Biegeschwenkrichtung 38 das Druckflächensegment 60 keinerlei Berührung mit dem Randbereich 20b haben kann. Ferner liegt auch der Drucksteg 58 in der inaktiven Stellung so, daß auch dieser in keinerlei Berührung mit dem Randbereich 20b des Werkstücks 20 kommt. Vorzugsweise liegt dabei der Drucksteg 58 stets auf einer Seite der Werkstückebene 64, ohne sich durch diese hindurchzubewegen, so daß keinerlei Kollision mit dem Randbereich 20b, unabhängig von der Länge desselben, auftreten kann. Die Länge des möglichen Randbereichs 20b wird lediglich dadurch bestimmt, in welchem Abstand von der Biegekante 66 sich der Lagerkörper 80 in der in Fig. 8 durchgezogen gezeichneten Biegeendstellung befindet, da sich während der Bewegung der Biegewange 30 in der Biegeschwenkrichtung 38 ein Teil des Lagerkörpers 80 durch die Werkstückebene 64 hindurchbewegt.The pressure surface segment 60, which is in the inactive position, is shifted so far in the direction 74 with respect to the bending edge 66 that, starting from the bending starting position shown in dash-dotted lines in FIG can have with the edge region 20b. Furthermore, the pressure web 58 is also in the inactive position such that it also does not come into contact with the edge region 20b of the workpiece 20. Preferably, the pressure web 58 is always on one side of the workpiece plane 64 without moving through it, so that no collision with the edge region 20b, regardless of the length thereof, can occur. The length of the possible edge region 20b is only determined by the distance from the bending edge 66 of the bearing body 80 in the bending end position shown in solid line in FIG. 8, since part of the bearing body 80 is located during the movement of the bending cheek 30 in the bending pivot direction 38 moved through the workpiece plane 64.

Kollisionen mit dem Randbereich 20b werden stets dann vermieden, wenn alle die Werkstückebene 64 bei der Biegeoperation durchlaufenden Bereiche des Biegewangenwerkzeugsegments 54 außerhalb eines durch einen Freiraumradius FR um die Biegekante 66 definierten Freiraums F liegen.Collisions with the edge area 20b are always avoided if all areas of the bending beam tool segment 54 passing through the workpiece plane 64 during the bending operation lie outside a free space F defined by a free space radius FR around the bending edge 66.

Ein Überführen des bewegbaren Druckflächensegments 60 von der inaktiven Stellung in die aktive Stellung ist in Fig. 9 dargestellt, wie in Fig. 9a dargestellt, wird ausgehend von der inaktiven Stellung des Druckflächensegments 60 zunächst die Biegewange 30 von der Maschinensteuerung 148 mittels des Stellantriebs 42 von der Schwenkachse 36 weg in Richtung 40 bewegt, so daß das Druckflächensegment 60 einen Abstand von der Unterseite 72 der Unterwangenwerkzeugspitze 68 aufweist.A transfer of the movable pressure surface segment 60 from the inactive position to the active position is shown in FIG. 9, as shown in FIG. 9a. Starting from the inactive position of the pressure surface segment 60, the bending beam 30 is first of all controlled by the machine control 148 by means of the actuator 42 of FIG the pivot axis 36 moves away in the direction 40, so that the pressure surface segment 60 is at a distance from the underside 72 of the lower jaw tool tip 68.

In dieser Stellung wird nun mittels des Endes 164 der Schieber 118 so verschoben, daß der Stützarm 98 von der nichtstützenden Stellung, dargestellt in Fig. 4, in die stützende Stellung, dargestellt in Fig. 3, übergeht und damit der Lagerkörper 80 soweit gekippt wird, bis das Druckflächensegment 60 in seiner aktiven Stellung steht, wie in Fig. 9c dargestellt. Anschließend wird die Biegewange 30 wieder entgegengesetzt zur Richtung 40 soweit in Richtung der Schwenkachse 36 bewegt, daß das Druckflächensegment 60 wieder unmittelbar an die Werkstückebene 64 angrenzt und neben der Biegekante 66 liegt, wie in Fig. 9d dargestellt.In this position, the slide 118 is now displaced by means of the end 164 so that the support arm 98 changes from the non-support position, shown in FIG. 4, to the support position, shown in FIG. 3, and thus the bearing body 80 is tilted so far until the printing surface segment 60 is in its active position, as shown in FIG. 9c. Then the bending beam 30 is again moved in the opposite direction to the direction 40 in the direction of the pivot axis 36 so that the pressure surface segment 60 again directly adjoins the workpiece plane 64 and lies next to the bending edge 66, as shown in FIG. 9d.

Bei einem zweiten Ausführungsbeispiel einer erfindungsgemäßen Lösung, dargestellt in Fig. 10, sitzt der Drucksteg 58 mit dem Druckflächensegment 60 auf einem Lagerkörper 80' welcher um eine Bewegungsachse 82' schwenkbar ist die bezogen auf die Mittelsenkrechte 95 zum Druckflächensegment 60 in entgegengesetzter Richtung 170 zur Biegeschwenkrichtung 38 versetzt angeordnet ist. Bei diesem Ausführungsbeispiel erfolgt ein Bewegen des Druckflächensegments 60 von der aktiven Stellung (in Fig. 10 gestrichelt gezeichnet) in die inaktive Stellung (in Fig. 10 durchgezogen gezeichnet) durch eine Bewegung in Richtung der Biegeschwenkrichtung 38.In a second exemplary embodiment of a solution according to the invention, shown in FIG. 10, the pressure web 58 with the pressure surface segment 60 is seated on a bearing body 80 'which can be pivoted about an axis of movement 82' which, in relation to the center perpendicular 95 to the pressure surface segment 60, is in the opposite direction 170 to the bending pivot direction 38 is arranged offset. In this exemplary embodiment, the pressure surface segment 60 is moved from the active position (shown in broken lines in FIG. 10) to the inactive position (shown in solid lines in FIG. 10) by moving in the direction of the bending pivot direction 38.

In dieser inaktiven Stellung bewegt sich das Druckflächensegment 60 längs einer Kreisbahn 172 um den Randbereich 20b herum, ohne mit diesem zu kollidieren.In this inactive position, the printing surface segment 60 moves along a circular path 172 around the edge region 20b without colliding with it.

Zusätzlich zum Druckflächensegment 60 liegen auch die anderen Bereiche des Biegewangenwerkzeugsegments 54 in der inaktiven Stellung außerhalb eines einen Freiraum F definierenden Freiraumradius FR um die Biegekante 66, sofern sie bei der Biegeoperation die Werkstückebene 64 durchlaufen.In addition to the pressure surface segment 60, the other areas of the bending beam tool segment 54 in the inactive position lie outside a free space radius FR defining a free space F around the bending edge 66, provided that they pass through the workpiece plane 64 during the bending operation.

Claims (18)

  1. Bending machine comprising a lower beam (12) with a lower beam tool (22), an upper beam (14) with an upper beam tool (24), the upper beam tool (24) and the lower beam tool (22) being movable relative to one another to clamp a workpiece (20), and a bending beam (30) pivotable about a pivot axis (36) with bending beam tool segments (44, 54) arranged thereon, each of said tool segments having a pressure surface segment (50, 60), and a bending beam pressure surface (52) which acts on the workpiece (20) during bending being able to be made up of the pressure surface segments (50, 60), characterized in that at least one bending beam tool segment (54) is provided with an adjustable pressure surface segment (60), in that in the case of the bending beam tool segment (54) the pressure surface segment (60) is movable from an active position in which it contributes to the pressure surface (52) of the bending beam tool (32), into an inactive position in which it is ineffective during a bending operation, and in that with the pressure surface segment (60) located in the inactive position, all of the areas of the bending beam tool segment (54) remaining in its position on the bending beam (50) which pass through the workpiece plane (64) during a bending operation lie outside a free space (F) defined by a free space radius (FR) around the bending edge (66).
  2. Bending machine as defined in claim 1, characterized in that in the inactive position the movable pressure surface segment (60) is arranged so as to be offset in the direction towards the bending beam (30) in relation to the active position.
  3. Bending machine as defined in claim 1 or 2, characterized in that in the inactive position the pressure surface segment (60) is located in a bending start position on a side of a lower beam tool tip (68) of the lower beam tool (22) facing away from the upper beam tool (24).
  4. Bending machine as defined in any one of the preceding claims, characterized in that the bending beam tool segment (54) has a base part (56) and a pressure bar (58) supported by the latter and bearing the movable pressure surface segment (60), and in that the pressure bar (58) is movable in relation to the base part (56).
  5. Bending machine as defined in claim 4, characterized in that in the inactive position of the movable pressure surface segment (60) the pressure bar (58) moves free of contact in relation to a workpiece plane (64) in the course of a bending operation.
  6. Bending machine as defined in claim 4 or 5, characterized in that in the inactive position of the movable pressure surface segment (60) the pressure bar (58) remains on one side of the workpiece plane (64) during the bending operation.
  7. Bending machine as defined in any one of claims 4 to 6, characterized in that the pressure bar (58) is movable in a direction opposite to the bending pivot direction (38) during the movement from the active into the inactive position.
  8. Bending machine as defined in any one of claims 4 to 7, characterized in that in bending end position the pressure bar (58) is located on a side of the workpiece plane (64) facing the bending start position.
  9. Bending machine as defined in any one of claims 4 to 8, characterized in that the pressure bar (58) is pivotable back and forth between the active and the inactive positions.
  10. Bending machine as defined in any one of claims 4 to 9, characterized in that the pressure bar (58) is pivotable in relation to the base part (56) about an axis (82) parallel to the movable pressure surface segment (60) and arranged on one side of a mid-perpendicular (95) relative to the pressure surface segment (60).
  11. Bending machine as defined in claim 10, characterized in that the axis (82) is located on a front side of the pressure bar (58) in bending pivot direction (38).
  12. Bending machine as defined in any one of claims 4 to 11, characterized in that in the active position the pressure bar (58) is able to be supported by a support arm (98) pivotable back and forth between a supporting position and a non-supporting position.
  13. Bending machine as defined in claim 12, characterized in that the support arm (98) is guided with its free end in a slotted guide means (130, 132) which determines the supporting and the non-supporting positions.
  14. Bending machine as defined in claim 12 or 13, characterized in that the support arm (98) is actuatable by a slide (118).
  15. Bending machine as defined in any one of the preceding claims, characterized in that the adjustable bending beam tool segment (54) is actuatable by a manipulator (150) controllable by a machine control (148) of the bending machine.
  16. Bending machine as defined in claim 15, characterized in that the manipulator (150) is displaceable parallel to the bending beam (30).
  17. Bending machine as defined in claim 15 or 16, characterized in that the manipulator (150) has an actuating arm (160) for adjusting the adjustable bending beam tool segment (54).
  18. Bending machine as defined in claim 17, characterized in that the actuating arm (160) interacts with the slide (118) of the adjustable bending beam tool segment (54) for adjusting the latter.
EP97942909A 1996-09-28 1997-09-04 Bending machine Expired - Lifetime EP0873206B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19640124 1996-09-28
DE19640124A DE19640124A1 (en) 1996-09-28 1996-09-28 Bending machine
PCT/EP1997/004797 WO1998013154A1 (en) 1996-09-28 1997-09-04 Bending machine

Publications (2)

Publication Number Publication Date
EP0873206A1 EP0873206A1 (en) 1998-10-28
EP0873206B1 true EP0873206B1 (en) 2002-02-27

Family

ID=7807313

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Application Number Title Priority Date Filing Date
EP97942909A Expired - Lifetime EP0873206B1 (en) 1996-09-28 1997-09-04 Bending machine

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EP (1) EP0873206B1 (en)
JP (1) JP2000501343A (en)
AT (1) ATE213673T1 (en)
DE (2) DE19640124A1 (en)
DK (1) DK0873206T3 (en)
ES (1) ES2173486T3 (en)
PT (1) PT873206E (en)
WO (1) WO1998013154A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19901794A1 (en) 1999-01-19 2000-07-27 Reinhardt Gmbh Maschbau Bending machine for flat materials has bending nose with curved pressure surface to engage on one side of flat material
DE19901796A1 (en) * 1999-01-19 2000-07-27 Reinhardt Gmbh Maschbau Bending machine for flat materials has machine frame open on one short side for material insertion and simplified bending tool carrier
DE50208077D1 (en) * 2002-09-23 2006-10-19 Trumpf Werkzeugmaschinen Gmbh Mechanical bending device and mechanical arrangement with such a bending device
DE10245778A1 (en) 2002-09-26 2004-04-08 Reinhardt Maschinenbau Gmbh A bending machine for sheet metal workpieces has a power assisted drive to clamp the workpiece between the holding blocks
AT517888B1 (en) * 2015-10-20 2017-09-15 Trumpf Maschinen Austria Gmbh & Co Kg Production plant for the production of workpieces made of sheet metal
KR101933532B1 (en) 2018-09-28 2018-12-28 한용운 Panel bending apparatus for door and method for bending a panel for a door using the same
DE102019123308A1 (en) * 2019-08-30 2021-03-04 Universität Siegen Device and method for swivel bending a workpiece
CN113617902B (en) * 2021-07-16 2023-07-25 南京蓝昊智能科技有限公司 Automatic adjustable upward pressing combined mechanism of bending machine

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1806986A (en) * 1927-07-20 1931-05-26 Caterpillar Tractor Co Sheet metal brake
GB1548707A (en) * 1977-08-09 1979-07-18 Folwell J D Seheet metal folding machine
JPS5944616U (en) * 1982-09-08 1984-03-24 丸機械工業株式会社 Mold changing device for folding machine
DE8600539U1 (en) * 1986-01-11 1986-05-28 Lummel, Heinz, 8782 Karlstadt Press brake for sheet metal working
JP2831707B2 (en) * 1989-07-25 1998-12-02 株式会社アマダ Ironing bending machine
DE4019881A1 (en) * 1990-06-22 1992-01-09 Horst Warneke SWIVEL BENDING PRESS FOR BENDING AND DEFORMING SHEET PANELS
DE9307907U1 (en) * 1993-05-25 1993-07-22 Griebel, Edgar, 97199 Ochsenfurt Bending machine

Also Published As

Publication number Publication date
WO1998013154A1 (en) 1998-04-02
DE59706496D1 (en) 2002-04-04
DK0873206T3 (en) 2002-06-10
EP0873206A1 (en) 1998-10-28
DE19640124A1 (en) 1998-04-09
PT873206E (en) 2002-08-30
ATE213673T1 (en) 2002-03-15
ES2173486T3 (en) 2002-10-16
JP2000501343A (en) 2000-02-08

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