EP0215263A2 - Presse à plier - Google Patents

Presse à plier Download PDF

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Publication number
EP0215263A2
EP0215263A2 EP86110702A EP86110702A EP0215263A2 EP 0215263 A2 EP0215263 A2 EP 0215263A2 EP 86110702 A EP86110702 A EP 86110702A EP 86110702 A EP86110702 A EP 86110702A EP 0215263 A2 EP0215263 A2 EP 0215263A2
Authority
EP
European Patent Office
Prior art keywords
tool
stop
bending press
press according
bending
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.)
Granted
Application number
EP86110702A
Other languages
German (de)
English (en)
Other versions
EP0215263B1 (fr
EP0215263A3 (en
Inventor
Hans Dipl.-Ing. Klingel (Fh)
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.)
Trumpf SE and Co KG
Original Assignee
Trumpf SE and Co KG
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 Trumpf SE and Co KG filed Critical Trumpf SE and Co KG
Priority to AT86110702T priority Critical patent/ATE47541T1/de
Publication of EP0215263A2 publication Critical patent/EP0215263A2/fr
Publication of EP0215263A3 publication Critical patent/EP0215263A3/de
Application granted granted Critical
Publication of EP0215263B1 publication Critical patent/EP0215263B1/fr
Expired 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
    • B21D5/02—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means
    • 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
    • B21D5/002—Positioning devices

Definitions

  • the invention relates to a bending press with an upper tool and a lower tool interacting with it, as well as a, in particular adjustable, stop and a support device for the workpiece.
  • Bending presses of this type are common in sheet metal forming.
  • the invention is preferably concerned with a die bending press in which the upper tool is designed as a bending punch and the lower tool as a corresponding bending die. If the bending die has the shape of a cross-sectionally V-shaped channel, for example with a flank angle of 90 °, and a flat sheet is pressed into this channel using the bending punch, this leads to an angular sheet, as is also the case, for example an ab edging machine can produce.
  • the length of the bending die is generally greater than the maximum extent of the sheet in the longitudinal direction of the bending die. The same applies to the bending die.
  • the sheet In order for the sheet to bend at the correct point, the sheet is pushed to a stop before the movable tool, in particular the upper tool, is brought in against the lower tool. If this is positioned correctly in relation to the bending tool, the sheet is also bent at the predetermined point.
  • the object of the present invention is to simplify and accelerate the alignment of the workpiece with respect to the bending tool. Furthermore, it is an object of the invention to design the bending press in such a way that certain operations can be carried out mechanically before pressing.
  • a bending press is designed according to the preamble of claim 1, in accordance with the characterizing part of this claim.
  • the workpiece preferably a sheet metal
  • the workpiece is placed on the support device by hand or, if appropriate, also with the aid of a manipulator. If the first stop is already aligned with the tool, the workpiece is pushed against the first using the second stop. Doing so this second stop has the function of a displacement device. If the first stop is not permanently installed, but can also be adjusted in a preferred manner, this or the second stop can first be brought into the correct position relative to the tool and then the workpiece can then be pushed with the other stop against the one initially positioned.
  • the sheet metal does not have to be inserted very precisely into this bending press, which enables the use of a simple charging device or facilitates the insertion by hand.
  • the stop set as the first must be positioned very precisely in relation to the bending tool. This can of course be done most simply and very precisely by means of an automatic system.
  • the two stops must be arranged and movably bendable so that the sheet can be assigned to the bending tool in any desired manner.
  • a further development of the invention is characterized by a third, in particular adjustable, stop, which is located between the first and second stops, but is laterally offset from it.
  • These three stops can be placed on three edges of a square sheet. The sheet must first touch the third stop. It is then moved against the first with the help of, for example, the second stop along the third stop. In this example, the first and third stops must be correctly aligned with the bending tool before the second stop is delivered.
  • Applying to the third stop is preferably comparatively easy to carry out if, in a further embodiment of the invention, there is a fourth deliverable stop opposite the third stop, the fourth and possibly the third stop being perpendicular to the direction of movement of the first and second stops extending coordinate direction are movable. It is now possible to assign a stop to each of the four edges of a square, in particular rectangular sheet. Two of these four stops are or are initially precisely aligned with respect to the bending tool and with the help of the other two the sheet is pushed against the positioned stops. At the end of this step, it takes a correct position with respect to the bending tool a.
  • the infeed direction of the first and second stop is in the direction of a Y coordinate
  • the infeed direction of the third and fourth stop is in the direction of an X coordinate.
  • Each of these four stops can be either a stop or a shifting device, one stop of each coordinate always being aligned first and then the sheet being moved with the other stop of each coordinate to rest against the two fixed or fixed stops.
  • the four stops must be designed and arranged so that none comes into the range of movement of the tool that can be advanced, in particular the upper tool. This primarily concerns the two stops, which are assigned to the sheet metal edges that run perpendicular to the longitudinal direction of the wedge-shaped bending die.
  • the sheet rests on a support device during the alignment.
  • This is a support table, a grate, bars, a lattice work or similar device with a flat support surface for the sheet.
  • the lower tool In particular in the middle area of this support device is the lower tool, for which a corresponding gap, a passage opening, a distance between elements or the like must be provided in the support device.
  • the forming part of the sub tool that is, the groove of the bending die, is assigned to the support surface of the support device in the manner required for the respective bending process.
  • the upper ends of the two groove flanks can lie, for example, in the plane defined by the support surface of the support device.
  • the adjustment direction of the adjustable stops is approximately perpendicular to the feed direction of the movable tool. This means that in the mentioned X-Y coordinate system the deliverable tool is moved in the direction of a Z axis.
  • each adjustable stop is adjustable by means of a drive motor.
  • This can be an electric motor as well as a hydraulic or pneumatic motor.
  • the rotary movement of the motor must be converted into a suitable translational movement, which is e.g. with the help of a pinion and a rack or spindle.
  • the motor is already performing a linear adjustment movement.
  • the movable stop can be coupled directly or indirectly with the piston of a hydraulic or pneumatic working cylinder using an intermediate member. Otherwise, electric or electromagnetic drives with a linear adjustment movement are known and can be used.
  • each drive motor for the stop adjustment can be switched on and off by means of a control, in particular a program control.
  • a control in particular a program control.
  • two of the four movable stops can be brought into the position required for bending the sheet at the intended location using the program control.
  • the program-controlled delivery of the second and fourth stop takes place.
  • the four stops are placed at a sufficiently large mutual distance before inserting the sheet - provided they are not already so that the sheet in the "field" defined by the four stops without hindrance from the stops can be inserted.
  • the deliverable tool is located above this field and below that the one that is stationary at least during the pressing process.
  • sheet metal of any size can be bent fully automatically and quickly, provided that their dimensions are within the maximum distances of the stops of this bending press.
  • This program also enables the press to be loaded and the bent sheet to be discharged quickly, safely and in a precisely recurring manner to get.
  • the spreading can be carried out, for example, with the help of at least one movable stop or at least with the help of the latter.
  • this stop can be moved beyond the vertical plane defined by the bending die, ie from a room on this side, to a room beyond this plane. In order not to have to accept any restrictions in this regard, it is expedient if all four stops can be moved in this way over approximately the entire contact area.
  • the stops are not stored on the support device, but preferably in locally separate guides that extend far enough beyond the support surface of the support device or at least moving the stops beyond the limits allow the contact surface.
  • the program control for the stop adjustment is part of a program control for the tool movement. This enables a fully automatic and correctly timed program sequence, whereby the sheet is first aligned using the stops and then bent. Following this operation, the finished bent sheet is removed.
  • each of the four adjustable stops consists of two stop halves, each stop half being separately adjustable and adjustable.
  • a motorized and in particular a program-controlled motorized adjustment is primarily intended.
  • the two stop halves of each stop are in extension from each other or respectively on a common straight line, but they are spaced apart from one another.
  • the first and second stops are referred to as "cross stops” and the third and fourth stops as “longitudinal stops”, the arrangement can be made in such a way that a cross stop half is assigned to a longitudinal stop half. If strip-shaped stops are involved, a cross-stop half and a longitudinal stop half each form a "stop corner".
  • each stop corner must be able to move past one another without obstruction. Furthermore, it is very advantageous that each stop or each stop half is detachably held in a stop receptacle. You can remove it if necessary and replace it with a stop or a stop half of another type if necessary. The latter affects both the shape and the size.
  • the support device for the workpiece consists of two support sub-devices, each of which is individually movable, in particular transversely to the direction of movement of the adjustable stops can be raised and lowered.
  • the space between the two support devices is intended for the bending tool and, if appropriate, for the passage of the movable bending tool part.
  • each support part device can be raised and lowered by means of a controllable motor, the height adjustment motors, in particular by means of the program control, being at least on and off. If necessary, you can also regulate the speed of the motors via the program control. If there is no program control or if the support sub-devices are not coupled to the program control, the adjustment of the support sub-devices can also be effected by manually switching the motors on and off with appropriate monitoring of the end positions.
  • An expanded automatic, in particular program-controlled bending processing of sheets opens another preferred embodiment of the invention, which is characterized in that the support part devices can be moved up and down parallel to themselves, but inclined to their support surface or the like.
  • only one support part device can be moved up and down parallel to themselves, but inclined to their support surface or the like.
  • the two angle legs of the bent sheet run in the direction of the flanks of the bending die, ie they also form an angle of, for example, 45 ° with the support surface of the support device or its support sub-devices.
  • the two sheet metal parts on either side of the bending point stand out from the contact surfaces. After pulling back the top tool, the bent sheet may remain in this position. This can be undesirable for further processing as well as removal, in particular the automatic pushing out using one of the stops.
  • each hold-down sub-device is controlled, preferably program-controlled, can be delivered against the assigned support sub-device or can be removed therefrom.
  • the sheet can be tipped to the desired side.
  • a program-controlled movement makes sense if, due to the special shape of the bent sheet or the special center of gravity, a mechanical tilting back is always or at least mostly necessary.
  • each hold-down device consists of at least one, but preferably a plurality of pins, bolts or the like elements arranged at a lateral distance.
  • a hold-down device consists of a bolt group or the like, it is possible, particularly in the case of program control and the bending of complicated sheet metal structures, to optionally reset and reset individual pins or pin groups.
  • the prerequisite is that each pin has its own drive and each of these drives can be controlled separately.
  • the upper and lower tools are preferably detachably held in an upper and lower tool holder, respectively. This means that each can be exchanged for another.
  • a particularly advantageous embodiment of the machine results, however, when the upper and lower tool holders are at least essentially designed and dimensioned the same.
  • the upper tool can be inserted into the tool holder of the lower tool and the lower tool into the tool holder of the upper tool.
  • This enables the sheet to be bent in a different direction. For example, you can bend up one edge of a sheet and bend down another in the opposite direction.
  • a Z-shaped structure is then created, for example. The latter can be part of a housing or the like.
  • the sheet does not have to be turned or turned over, although it is angled in the opposite direction. It is only necessary to swap the upper and lower tools after the first bending process and to move the sheet metal into the correct position for the second bending process. It can easily be seen that this design, in particular in connection with the lowerable support part devices, enables automated production of complicated sheet metal parts. By lowering one or, if necessary, also both support part devices, the necessary space for bending is created with interchanged upper and lower tools. The workpiece can be brought back into a desired position by raising it.
  • the bending press is equipped with a tool changing device for the upper and the lower tool.
  • these tool changing devices which can be of a known type, the upper tool is removed simultaneously or separately from the upper tool holder and the lower tool from the lower tool holder.
  • two separate tool changing devices are provided, as stated, the one for the upper tool being above the sheet plane and the one for the lower tool below the sheet plane.
  • a prerequisite for the automatic changing of the device is also an automatic locking and unlocking device which is common in other machine tools with a reciprocating working movement, locking and unlocking being accomplished, for example, by controllable wedges which convert a horizontal movement into a locking movement transverse to it Implement locking movement.
  • each drive motor of each tool changing device can be switched on and off by means of the control, in particular program control of the bending press.
  • control in particular program control of the bending press.
  • control for example the pump motor on and off or opens and closes a locking element for the pressure medium.
  • a preferred variant of the invention therefore provides that the direction of insertion or exchange of the tool changing devices runs transversely to the infeed direction of the deliverable tool along the bending line of the bent, that is to say bent or angled, workpiece.
  • Another advantageous embodiment of the invention is characterized by a device for rotating the workpiece, in particular within the workpiece plane.
  • a device for rotating the workpiece in particular within the workpiece plane.
  • stop halves whereby the word "halves” is not to be understood in the strict sense, rather the two, however independent parts of each stop can also be of different lengths, even different designs. If they can be delivered separately, you can use the two stop halves of a stop to move a sheet cleanly parallel to one another even if the longitudinal edge assigned to these "stop halves" runs like a step. Corresponding to the ledge, one of the stop halves leads the other accordingly when moving. The same also applies when placing on firmly positioned stop halves.
  • a particularly advantageous development of the invention results when the upper and lower tools form part of the workpiece turning device, these tools being rotatably mounted in their tool holders or the latter being rotatably mounted in a holder for the tool holder and at least one tool or each tool holder is equipped with a rotary drive.
  • the axis of rotation for the workpiece runs parallel to the feed direction of the movable tool.
  • the rotary drive can be designed in a known manner, for example by concentrically mounting a pinion or the like on a tool shaft or on a shaft of a tool holder attaches, which drives by means of a suitable other machine element, for example a rack or a gear wheel, which is connected to a corresponding controllable motor with a rotary drive.
  • the tool is also rotated, preferably via a correspondingly expanded program control.
  • the workpiece must be secured against shifting transversely to the axis of rotation during the rotational movement.
  • stops that can only be moved linearly.
  • One solution to this problem is that the workpiece is clamped between the upper and lower tools while it is being rotated without causing any deformation.
  • the tool then also simultaneously forms a holding device for the workpiece during the turning.
  • Another embodiment of the invention is characterized by a tool magazine for receiving a plurality of upper and lower tools, the tool changing device being selectively assignable to the tool magazine or the tool holder.
  • the tool changing device With the help of the tool changing device, an upper and a lower tool are removed from the preferably two-part tool magazine. The upper tool is then transferred to the upper tool holder and the lower tool into the lower tool holder and locked. After use, you take both of their tool holders and bring them back to the tool magazine. From this you then take the tool that is needed next.
  • the latter may optionally be of the same design as that used previously, with the difference that the tool changing device now exchanges a tool in the upper tool holder which corresponds to that which was previously in the lower tool holder and vice versa.
  • Such a tool change enables the bending up of a sheet metal edge and the subsequent bending down of a second sheet metal edge, for example parallel thereto, in the manner described above.
  • the tool changing device can optionally assign its gripping device or the like to the tool magazine or the tool holder of the press.
  • the tool magazine must be adjusted when changing from one tool to another. It is possible to design this tool magazine to be rotatable in the manner of a carousel or to use a magazine that can be pushed back and forth linearly.
  • All of the described movements of the machine and its auxiliary devices can preferably be controlled by means of an overall program.
  • the tool magazine can be moved, in particular transversely to the bending line.
  • the frame 1 of the bending press consists in the usual way of a column and a boom, at the free end of which a press cylinder 28 is arranged.
  • the bearing surface 18 for the workpiece 6 rests on the support device 5, which is subdivided into two sub-devices 16 to enable the upper tool 2 fastened in the tool holder 21 to pass through.
  • Each of the sub-devices 16 is provided with a height adjustment motor 17, so that different heights can be set depending on the requirements.
  • the lower tool 3 is likewise arranged in a tool holder 21 between the two support part devices 16.
  • a rear stop 4 is initially provided for the workpiece 6 and is adjustable in order to obtain a basic setting. Opposite this is a second deliverable stop 7, which at the same time takes over the function of a displacement device.
  • a third stop 8 and a fourth stop 9 opposite it are provided on the side, which are adjustable perpendicular to the direction of movement 11 of the other two stops 4, 7.
  • Drive motors 13, which are connected to a control device 14, serve to move the stops 4, 7-9.
  • each of the four adjustable stops consists of two stop halves, which in turn are combined into corner stops, as a result of which a very precise alignment of the workpiece 6 can be achieved. If a workpiece 6 is not exactly rectangular, then compensating, appropriately shaped inserts 27 are used for the corners.
  • the stops are fastened in stop receptacles 15, which in turn can be moved on guide rods 29.
  • each hold-down device 16 being assigned a hold-down device 19 with holding pins 20. This division is necessary in order to enable adaptation to different height settings of the support sub-devices 16 and to push back the bent workpieces and to prevent the workpiece from tipping over when the support surfaces are of different heights.
  • FIGS. 4 and 5 show, another way is selected according to the present invention, in which the workpiece 6 remains in its position, but the upper and lower tools 2, 3, as shown in FIGS. 4 and 5, are changed.
  • a tool changing device 22 is provided, which consists of two changing and changing devices 23 for the upper tool 2 and the lower tool 3.
  • the tools are used by the Grippers 31 are gripped and inserted into empty chambers of the tool magazine.
  • a separate magazine 25 is provided for each of the upper and lower tools, the magazines being arranged on guide rails 30 so as to be displaceable in the direction of arrow 26. Then the new tool is removed from a full chamber and inserted into the holder.
  • the workpiece For some types of machining, the workpiece must be rotated in its plane.
  • a rotatable support 32 is provided in FIG. 6, onto which the workpiece 6 is pressed.
  • a pressure pin 34 provided with a turntable at its free end is provided.
  • the rotary drive takes place via a special motor 33. It is of course also possible to arrange the two tools 2 and 3 rotatably and to clamp the workpiece between them for rotation.
  • the workpiece 6 is then moved by the stops into the position shown in Figure F.
  • the support part device 16 on the right in the plane of the drawing must be lowered so that the free end of the workpiece 6 can deflect when bent, such as that Figure G shows.
  • the height of the two partial support surfaces 16 is then adjusted relative to one another in such a way that the workpiece 6 is aligned, as shown in Figure H, and the stops can push the workpiece out. While it was previously necessary to place and remove the workpiece several times and to turn and turn it, a Z-shaped workpiece can now be manufactured by hand without any intervention.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Braking Arrangements (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Press Drives And Press Lines (AREA)
EP86110702A 1985-09-18 1986-08-02 Presse à plier Expired EP0215263B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86110702T ATE47541T1 (de) 1985-09-18 1986-08-02 Biegepresse.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3533235A DE3533235C2 (de) 1985-09-18 1985-09-18 Biegepresse
DE3533235 1985-09-18

Publications (3)

Publication Number Publication Date
EP0215263A2 true EP0215263A2 (fr) 1987-03-25
EP0215263A3 EP0215263A3 (en) 1987-09-23
EP0215263B1 EP0215263B1 (fr) 1989-10-25

Family

ID=6281256

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86110702A Expired EP0215263B1 (fr) 1985-09-18 1986-08-02 Presse à plier

Country Status (6)

Country Link
US (1) US4753099A (fr)
EP (1) EP0215263B1 (fr)
JP (1) JPS6268625A (fr)
AT (1) ATE47541T1 (fr)
AU (1) AU598202B2 (fr)
DE (1) DE3533235C2 (fr)

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WO2007073901A3 (fr) * 2005-12-16 2007-08-16 Hans Klingel Machine a cintrer

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JP5108260B2 (ja) * 2006-07-06 2012-12-26 株式会社アマダ 曲げ加工機金型レイアウトの活用方法およびその装置
SE537072C2 (sv) * 2013-06-05 2014-12-30 Mizelda Ab Vikanordning och användning av vikanordning för vikning av ett ämne
CN104923690A (zh) * 2015-06-09 2015-09-23 江苏大学 一种折弯机凸模保护装置
DE102019105426A1 (de) * 2019-03-04 2020-09-10 Wittur Holding Gmbh Biegezentrum mit vereinfachtem werkzeugwechsler
CN114603041B (zh) * 2022-03-25 2024-04-05 宁波惠康工业科技股份有限公司 一种冷柜背板的自动生产线设备
CN116100745B (zh) * 2022-12-22 2025-01-10 江苏杰士德精密工业有限公司 耳机注塑件自动下料设备
CN116214898B (zh) * 2023-01-04 2025-12-23 常州嵩源精密装备有限公司 一种fpc电路板自动定位预弯折装置
CN116423230B (zh) * 2023-04-28 2024-01-02 东莞新永腾自动化设备有限公司 一种用于新能源产业的防磨损铜铝排折弯机
CN116460208B (zh) * 2023-05-18 2025-07-01 常州普拓模拟器智能装备有限公司 一种汽车配件冲压装置
CN119237642B (zh) * 2024-12-09 2025-04-08 定襄中旺重工有限公司 一种空气包壳体锻造专用模具

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US4411150A (en) * 1981-10-21 1983-10-25 Houdaille Industries, Inc. Backgauge structure
JPS6023050Y2 (ja) * 1981-12-16 1985-07-09 株式会社小松製作所 折り曲げ機
EP0100420A1 (fr) * 1982-07-14 1984-02-15 Hämmerle AG Appareil pour manipuler des pièces de travail
US4594870A (en) * 1982-11-25 1986-06-17 Shin-Meiwa Industry Co., Ltd. Automatic bending apparatus
NL8303472A (nl) * 1983-10-10 1985-05-01 Liet Cornelis Hendricus Inrichting voor het buigen van plaatmateriaal.
DE3407445A1 (de) * 1984-02-29 1985-09-12 Siemens AG, 1000 Berlin und 8000 München Positioniervorrichtung fuer automatisch bestueckbare biegepresse
DE3512218C2 (de) * 1984-04-07 1993-10-14 Amada Co Abkantpresse

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2652521A1 (fr) * 1989-09-29 1991-04-05 Amada Co Ltd Appareils de manutention et de redressement de feuilles et cintreuse et procede de redressement de feuilles.
WO2007073901A3 (fr) * 2005-12-16 2007-08-16 Hans Klingel Machine a cintrer

Also Published As

Publication number Publication date
ATE47541T1 (de) 1989-11-15
EP0215263B1 (fr) 1989-10-25
EP0215263A3 (en) 1987-09-23
DE3533235A1 (de) 1987-03-26
AU598202B2 (en) 1990-06-21
US4753099A (en) 1988-06-28
JPS6268625A (ja) 1987-03-28
AU6244586A (en) 1987-03-19
JPH036847B2 (fr) 1991-01-31
DE3533235C2 (de) 1997-03-20

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