EP0483641A2 - Dispositif pour cintrer de la tôle - Google Patents

Dispositif pour cintrer de la tôle Download PDF

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Publication number
EP0483641A2
EP0483641A2 EP91117972A EP91117972A EP0483641A2 EP 0483641 A2 EP0483641 A2 EP 0483641A2 EP 91117972 A EP91117972 A EP 91117972A EP 91117972 A EP91117972 A EP 91117972A EP 0483641 A2 EP0483641 A2 EP 0483641A2
Authority
EP
European Patent Office
Prior art keywords
bending
guide
cheek
frames
bending cheek
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.)
Withdrawn
Application number
EP91117972A
Other languages
German (de)
English (en)
Other versions
EP0483641A3 (en
Inventor
Rolf Schwarzmann
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.)
CRUCILO ENTWICKLUNGSGESELLSCHAFT mbH
Original Assignee
CRUCILO ENTWICKLUNGSGESELLSCHAFT mbH
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 CRUCILO ENTWICKLUNGSGESELLSCHAFT mbH filed Critical CRUCILO ENTWICKLUNGSGESELLSCHAFT mbH
Publication of EP0483641A2 publication Critical patent/EP0483641A2/fr
Publication of EP0483641A3 publication Critical patent/EP0483641A3/de
Withdrawn legal-status Critical Current

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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

Definitions

  • the invention relates to a device for bending sheet metal with at least one bending cheek serving as a bending tool, which is pivotably mounted on its edge area facing away from the bending area, and with a tensioning device near the bending area, the pivoting movement of the bending cheek being guided over guide segments with circular-arc-shaped contours.
  • parts are often manufactured which are bent at the edges one or more times both upwards and downwards. These are mainly parts for luminaire housings, cladding for electrical devices and household appliances, for steel furniture and shelves as well as for wall and ceiling cladding. The surface of these parts must not be damaged during bending as they are often already painted, coated or otherwise pretreated.
  • a device of the type mentioned at the outset is known in practice, in which the clamping device consisting of a lower and upper beam as well as the bending beam are accommodated in several C-shaped machine stands which, even in the case of long bent parts, act on the lower and upper beam of the clamping device and absorb forces acting on the bending beam.
  • the bending beam is pivotally mounted on segments in the form of a circular arc, which are attached in these C-shaped frames.
  • a hydraulic cylinder is installed in each of these frames, which is connected to the bending beam. When the cylinders are actuated, the bending beam on the segments is pivoted about the pivot axis of the top beam.
  • this known device has the disadvantage that it is only equipped with a bending beam and therefore the workpieces can in principle only be bent in one direction. Short legs can also be bent in the opposite direction using an additional bending jaw that is attached to the bending beam. However, the bending radius for such a bend is not exact because the workpiece to be machined is bent around a pivot point offset from the bending edge of the bending jaw. Furthermore, with this device, longer legs and legs that have already been folded once cannot be bent in both directions. In the case of parts which are bent both upwards and downwards, two devices have to be built up in succession, which results in higher investment costs and a larger space requirement, as well as greater inaccuracies when realigning the bent part in the second device. Also, due to the change in the relative position between the bending tool and the working cylinder driving it, the application of force is irregular, which can also have a disadvantageous effect on the precision of the bending movement.
  • DE-OS 36 05 815 describes a device which also works according to the swivel bending method, in which an upper and a lower bending cheek are mounted laterally in a carrier.
  • This carrier can be swiveled vertically up and down around a horizontal axis.
  • the bending cheeks are each mounted on the outside of the beam.
  • the distance between the two bearing points, and thus the free length of the bending cheeks, must therefore always be somewhat larger than the longest part that is to be bent on this device. In the case of longer parts which are to be bent with a good quality of the bending radius, this leads to a heavy and correspondingly complex device.
  • the invention is therefore based on the object of providing a device of the type mentioned at the outset which, even when used in linked production plants, does not significantly increase the required technical outlay and can be used to produce any desired bending angle with high precision.
  • each guide segment has a toothing which meshes with at least one driven gearwheel provided on the bending cheek.
  • the bending device according to the invention is therefore also well suited for use in linked production systems, since additional transverse transport devices which feed the workpieces to the bending device can be dispensed with.
  • the device according to the invention can therefore not insignificantly reduce the cycle times and increase the economy of such manufacturing plants.
  • the bending movement can be carried out with high precision in the device according to the invention.
  • the guide segment has or is an arc-shaped guide rail, which is preferably acted upon on the outside and inside of its arc shape by counter-guide elements of the bending beam.
  • a circular arc-shaped guide rail which is acted upon by the counter-guide elements of the bending beam, absorbs the forces acting on the bending beam during the bending movement.
  • gearwheel provided on the bending cheek is arranged coaxially with one or more counter-guide elements.
  • an electric or hydraulic drive motor is provided for the gearwheel.
  • the bending device according to the invention is also well suited for freely programmable control of the bending process.
  • the drive motor for the gearwheel is a servo motor which, via the control, permits precise preselection or programming of the bending angle to be carried out in each case.
  • the gear wheels of parallel, spaced-apart guide segments are connected to one another via a rotationally fixed connecting shaft and are driven synchronously, preferably by a common drive motor.
  • a non-rotatable connecting shaft and the synchronous drive of the parallel gears prevent asymmetrical bending forces.
  • a common drive motor reduces the design effort required.
  • the toothing is arranged on the inside of the circular arc-shaped guide rail, and if the driven gearwheel of the bending cheek meshing with this toothing, and optionally also the connecting shaft, is provided in the free space within the guide rail.
  • the gears of a plurality of parallel, spaced-apart guide segments can also be connected to one another via a continuous, common connecting shaft, with sufficient space in the free space within the guide rail for a shaft or the like protruding from the guide.
  • a particularly advantageous embodiment according to the invention which can also have its own protective effect, provides that each guide segment has two interconnected, arranged in one plane guide rails that intersect with their circular arc shapes and end at this intersection that one on both guide rails Each guide segment is pivotally guided, and that each guide segment is pivotally held on the bending device for selectively pivoting one of its two bending beams into the bending area.
  • the corresponding bending webs are thus available, in particular for workpieces which can be bent upwards and downwards, and at the same time the advantage according to the invention is used to guide and drive these bending webs on circular arcs with teeth.
  • a bending device 1 which has a pivotable bending beam 2 serving as a bending tool for bending sheet metal and a clamping device 3 near the bending area.
  • the pivoting movement of the bending cheek 2 is guided over guide segments 4 with circular-arc-shaped contours, only one of these parallel, spaced-apart guide segments 4 being shown in the side view in FIG. 1.
  • the bending beam 2 is pivotally mounted with its guide segments 4 in at least two approximately C-shaped frames 5.
  • the clamping device 3 is arranged, which has a lower beam 6 which is fixedly connected to the frames and an upper beam 7 which can be lowered onto the workpiece (not shown further here).
  • the upper beam 7 can be moved up and down via hydraulic cylinders 8, which are fastened in the C-shaped frames 5, for clamping the workpiece when bending in the direction of the double arrow Pf 1.
  • the guide segments 4 are each attached to one of the C-shaped frames 5.
  • the open area of the C-shape of these frames 5 and the open area of the circular arc shape of the guide segments 4 connected to the frames 5 form a recess 10 for the workpieces which is open towards the operating side A of the device 1.
  • These bent parts can be fed to the device 1 both in parallel and from the operating side A perpendicular to the bending axis.
  • the guide segment 4 connected to the frame 5 is designed as an arcuate guide rail which is acted upon on the outside and inside of its arcuate shape by counter-guide elements 11 of the bending beam 2.
  • each of the guide segments 4 has a toothing 12 visible in FIG. 2, which meshes with a driven gear 9 provided on the bending cheek 2.
  • the toothing 12 is arranged on the inside of the circular guide rail.
  • Two of these counteracting elements 11, which act on the inside and are designed as guide rollers 15, are arranged coaxially with the toothed wheel 9, which meshes with the toothing 12 of the guide segment 4; the gear 9 is driven by the servo motor 13 shown in FIG. 2.
  • a hydraulic drive motor can also be provided.
  • the driven gear wheels 9 of the two parallel guide segments 4, which are arranged at a distance from one another in the frames 5, are connected to one another via a rotationally and flexurally fixed connecting shaft 14, which is provided in the free space of the circular-shaped guide segments 4.
  • the servo motor 13 serves to drive the gear wheels 9 synchronously as a common drive motor; the motor 13 is fastened to the bending beam 2 and can be pivoted together with the latter.
  • guide rollers 15 act on the inside of the guide segment 4, there are also two on the outside thereof counter-guide elements 11 also formed as guide rollers 16.
  • the bent part to be machined can also be fed to the bending device 1 in a linked production system perpendicular to the plane of the drawing and at the same time parallel to the bending axis, without the need for an expensive transverse transport which increases the cycle time.
  • the processing level is defined by the lower beam 6 which is firmly connected to the frame 5.
  • the upper beam 7 of the clamping device 3 is lowered onto the workpiece by means of the hydraulic cylinder 8.
  • the bending cheek 2 which is pivotably mounted in the guide segments 4 of the frames 5
  • the bent part is bent in its edge region facing the device 1.
  • To pivot the bending cheek 2 it is moved with its cheek bracket 17 on the guide segments 4 each formed as a circular arc-shaped guide rail.
  • This pivoting movement of the bending beam 2 takes place by means of the servo motor 13, which drives the toothed wheels 9 of the bending beam 2 which mesh with the internal toothing 12 of the guide segments 4 and are connected to one another via the torsionally rigid shaft 14 and which, like the counter-guide elements 11, via this common connecting shaft 14 are rotatably mounted in the cheek brackets 17.
  • Two of the guide rollers 15 acting on the inside of the guide segment 4 are also arranged rotatably on the connecting shaft 14 coaxially to the gear 9, via roller or needle bearings.
  • a corresponding control means of the inventive device can bending parts with any angle between 0 and 135 are made o very flexible and with great accuracy.
  • the torsionally rigid connecting shaft 14 prevents that when parts are bent, which are not symmetrical between the C-shaped frames 5, the bending beam 2 is bent.
  • FIG. 3 shows a device 18 which, in contrast to the bending device 1, has two bending cheeks 2 and can bend bent parts both upwards and downwards.
  • each of the guide segments 4 provided on a rocker 23 has two interconnected guide rails 19 arranged in one plane, which intersect with their circular arc shapes and end at this intersection 20.
  • Each guide segment has on its two interconnected, circular arc-shaped guide rails 19 a toothing 12 which - similar to the bending device 1 from FIGS. 1 and 2 - meshes with a driven gear 9 provided on each of the bending cheeks.
  • Each guide segment 4 is in turn pivotally held on the associated C-shaped frame 5 of the bending device 18 by means of the rocker 23 in order to pivot one of the two bending cheeks 2 into the bending region.
  • the rockers 23 can be pivoted together in the C-shaped frames 5 via hydraulic cylinders 21 into two positions adjustable via stops 22. The upper position corresponds to the working position of the lower bending beam, the lower position corresponds to the working position of the upper bending beam. If the direction in which the workpiece is to be bent is to be changed in a bent part, then the rocker 23 is simply controlled into the other position and in this way the other bending cheek is brought into the working position.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
EP19910117972 1990-10-27 1991-10-22 Bending device for sheet metal Withdrawn EP0483641A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4034248A DE4034248A1 (de) 1990-10-27 1990-10-27 Vorrichtung zum biegen von blech
DE4034248 1990-10-27

Publications (2)

Publication Number Publication Date
EP0483641A2 true EP0483641A2 (fr) 1992-05-06
EP0483641A3 EP0483641A3 (en) 1992-07-15

Family

ID=6417187

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910117972 Withdrawn EP0483641A3 (en) 1990-10-27 1991-10-22 Bending device for sheet metal

Country Status (2)

Country Link
EP (1) EP0483641A3 (fr)
DE (1) DE4034248A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2686276A1 (fr) * 1992-01-20 1993-07-23 Dimeco Alipresse Plieuse pour flans metalliques.

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4244965C2 (de) * 1992-01-17 2003-02-13 Sillner Kamilla Vorrichtung zum Ver- und Bearbeiten von Bauelementen sowie Biegestation
CN101716726B (zh) * 2009-12-14 2011-07-13 天水锻压机床有限公司 折弯机矩形复合导轨系统
AT515280B1 (de) * 2014-06-10 2015-08-15 Trumpf Maschinen Austria Gmbh Biegepresse mit Biegeeinheit sowie Verfahren zur Umformung
CN111906183B (zh) * 2020-07-29 2022-11-01 杭州华裕机械有限公司 一种机械加工用的铁片倒角机
CN112828086B (zh) * 2020-12-23 2022-09-06 海南电网有限责任公司海南输变电检修分公司 便携式10kv硬母排弯曲工具

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE749720C (de) * 1940-04-13 1944-12-02 Elektrisch-hydraulisch betaetigte Abkant- und Rundbiegemaschine
CH328513A (de) * 1954-01-26 1958-03-15 Wachter August Leistenpresse
CH388886A (de) * 1961-11-03 1965-03-15 Bruendler Hans Blechabkantmaschine
GB1160177A (en) * 1964-09-16 1969-07-30 Stephen Peter Midouhas Automatic Bending Brake
US4875356A (en) * 1988-08-23 1989-10-24 Deere & Company Material fabricating mechanism
EP0338949A1 (fr) * 1988-04-20 1989-10-25 Dimeco Alipresse Societe Anonyme : Machine à plier les tôles
FR2642677A1 (fr) * 1989-02-07 1990-08-10 Libaud Bernard Machine de pliage de toles

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1744391A (en) * 1924-12-18 1930-01-21 Bartlett Hayward Co Plate-bending machine
DE3605815C2 (de) * 1986-02-22 1995-06-22 Weinbrenner Paul Maschbau Vorrichtung zum Biegebearbeiten von Blechtafeln

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE749720C (de) * 1940-04-13 1944-12-02 Elektrisch-hydraulisch betaetigte Abkant- und Rundbiegemaschine
CH328513A (de) * 1954-01-26 1958-03-15 Wachter August Leistenpresse
CH388886A (de) * 1961-11-03 1965-03-15 Bruendler Hans Blechabkantmaschine
GB1160177A (en) * 1964-09-16 1969-07-30 Stephen Peter Midouhas Automatic Bending Brake
EP0338949A1 (fr) * 1988-04-20 1989-10-25 Dimeco Alipresse Societe Anonyme : Machine à plier les tôles
US4875356A (en) * 1988-08-23 1989-10-24 Deere & Company Material fabricating mechanism
FR2642677A1 (fr) * 1989-02-07 1990-08-10 Libaud Bernard Machine de pliage de toles

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2686276A1 (fr) * 1992-01-20 1993-07-23 Dimeco Alipresse Plieuse pour flans metalliques.

Also Published As

Publication number Publication date
DE4034248A1 (de) 1992-04-30
EP0483641A3 (en) 1992-07-15

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