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, of which each has a pressure surface segment, it being possible to assemble from the pressure surface segments a bending cheek pressure surface which acts on the workpiece during bending.
• 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.
• 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 adjustable is formed and that in the adjustable bending beam tool segment, the pressure surface segment can be moved from an active position, in which it contributes to the bending beam pressure surface, to an inactive position, in which it is ineffective during a bending operation.
• the advantage of the solution according to the invention is thus to be seen in the fact that the adjustable bending beam tool segment eliminates the 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 thus an alternating use of the adjustable bending beam tool segment, in particular in the course of machining a workpiece, is 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. 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 central 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.
• 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 it.
• 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.
• Figure 1 is 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 shows an enlarged, fragmentary illustration of a bending cheek with a bending cheek tool and an upper cheek with an upper cheek tool and a workpiece of the first exemplary embodiment held on the upper cheek tool by means of a cheek tool not shown.
• FIG. 3 shows a cross section through a lower beam tool and an adjustable bending beam tool segment of the first exemplary embodiment in its active position
• FIG. 4 shows a cross section similar to FIG. 3 with the adjustable bending beam tool segment in the inactive position
• FIG. 5 shows a perspective illustration of a bending beam tool segment of the first exemplary embodiment that is adjustable according to the invention
• FIG. 6 shows an exploded view of the bending beam tool segment according to FIG. 5; 7 shows a section similar to FIG. 3 with a representation of 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 shows a section similar to FIG. 3 through the lower beam tool, the upper beam tool and an adjustable bending beam tool segment in the inactive position during the course of a bending operation;
• FIG. 9 shows a representation similar to FIG. 4 with 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 shows a section similar to FIG. 8 through a second exemplary 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.
• 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 is adjustable in its starting position shown in FIG.
• the adjustment is preferably carried out via an actuator 42 arranged in the bending beam arms 24, which in the simplest case is designed as a cylinder with which the bending beam 30 can be moved between an upper position and a lower position relative to the bending beam arms 34.
• 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 this rests on the bending beam 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 area duck 50 contribute to the formation of 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 at the end carries a pressure surface segment 60 which 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 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.
• 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 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 use them to bend the edge region 20a, 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 normal 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. In this inactive position, 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 tool plane 64 during the bending operation.

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

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• 1996
  • 1996-09-28 DE DE19640124A patent/DE19640124A1/de not_active Ceased
• 1997
  • 1997-09-04 WO PCT/EP1997/004797 patent/WO1998013154A1/fr active IP Right Grant
  • 1997-09-04 AT AT97942909T patent/ATE213673T1/de active
  • 1997-09-04 DE DE59706496T patent/DE59706496D1/de not_active Expired - Lifetime
  • 1997-09-04 EP EP97942909A patent/EP0873206B1/fr not_active Expired - Lifetime
  • 1997-09-04 ES ES97942909T patent/ES2173486T3/es not_active Expired - Lifetime
  • 1997-09-04 JP JP10515193A patent/JP2000501343A/ja not_active Ceased
  • 1997-09-04 DK DK97942909T patent/DK0873206T3/da active
  • 1997-09-04 PT PT97942909T patent/PT873206E/pt unknown

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