EP0106298B1 - Schwenkbiegemaschine - Google Patents

Schwenkbiegemaschine Download PDF

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Publication number
EP0106298B1
EP0106298B1 EP83110085A EP83110085A EP0106298B1 EP 0106298 B1 EP0106298 B1 EP 0106298B1 EP 83110085 A EP83110085 A EP 83110085A EP 83110085 A EP83110085 A EP 83110085A EP 0106298 B1 EP0106298 B1 EP 0106298B1
Authority
EP
European Patent Office
Prior art keywords
bending
sheet
folding
steering
switches
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
Application number
EP83110085A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0106298A3 (en
EP0106298A2 (de
Inventor
Jorgen Schiöler Andersen
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.)
MASKINFABRIKEN CIDAN AS
Original Assignee
MASKINFABRIKEN CIDAN AS
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 MASKINFABRIKEN CIDAN AS filed Critical MASKINFABRIKEN CIDAN AS
Priority to AT83110085T priority Critical patent/ATE24129T1/de
Publication of EP0106298A2 publication Critical patent/EP0106298A2/de
Publication of EP0106298A3 publication Critical patent/EP0106298A3/de
Application granted granted Critical
Publication of EP0106298B1 publication Critical patent/EP0106298B1/de
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
    • B21D5/04—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 swivel bending machine in which a sheet is fastened between a lower beam and a clamping beam with interchangeable bending strips and the bending is carried out with a bending beam which is pressed against the projecting part of the sheet by means of a pivoting movement.
  • a sheet metal bending machine is described for example in DE-B-1 076 608.
  • the bending beam can be driven by electric motors or moved hydraulically.
  • the clamping beam is usually provided with interchangeable bending strips, the profiles of which allow sharp bends of, for example, 135 ° or round bends up to 180 °, which means that the bending beam must also be able to 180 ° to pan.
  • folding machines are usually provided with programmable elements which switch off the current for the drive motors or interrupt the supply of hydraulic fluid to the hydraulic cylinder actuating the bending beam.
  • These parts can, as suggested in the above-mentioned publication, be formed by discs or rollers with a manually adjustable cam projection, which cooperate with contact rails in such a way that they actuate an electrical switch when they move from the bending beam according to a desired angle Distance to be moved. With each machining process, these discs or rollers are turned one step further so that the new projection switches off the movement of the bending beam.
  • the angular movement of the bending beam can of course also be controlled electronically.
  • the electronic influence on angular movements according to an input program is well known and need not be described in more detail here.
  • the object of the invention is to provide actuating elements for a folding machine which prevent both incorrect programming and incorrect operation, so that a pivoting movement of the bending beam beyond the limit angle determined by a given bending strip is not possible.
  • the interchangeable bending strips are designed in such a way that they interact with a set of control elements which are fixedly arranged in the clamping cheek in order to set up the control pattern in the control circuit for driving the bending cheek such that the maximum permissible bending angle of the bending cheek is determined, if the mentioned bending strip is used.
  • a projection or better a recess can be provided at the rear edge of the bending strip, and these projections or recesses then actuate one or more rows of switches which are fastened to the clamping cheek.
  • Part of the rear edge of the bending rail can be designed as an actuating element for actuating levers of a system of hydraulic valves, or a plate made of insulating material can be embedded in the bending strip, which carries contact pieces that interact with corresponding contact pieces in the clamping cheek.
  • the code can be a single selection of a single electrical and hydraulic core, or it can be a match of a combination of cores. The number of codes must of course correspond to the number of different bending strips.
  • opening and closing a single circuit is sufficient to determine the maximum allowable bending angle for each of the two strips. With three circuits, for example, eight angles can be defined.
  • Binary codes are first and foremost important when the plate bending machine is operated electronically. By applying a voltage to a combination of channels leading to the electronic control device, the voltage combination can be converted into a control command which prevents a certain bending angle from being exceeded, although the program entered gives a control command for this.
  • the greatest security against operating errors is achieved by using a closed control circuit, which switches off the energy supply to drive the bending machine independently of the automatic and / or manual control.
  • this closed control circuit a plurality of switches connected in series are provided which are opened separately or in succession by an element which is moved synchronously with the bending bar.
  • the individual switches with the exception of the last one in the rows, are connected in parallel with one or more switches which interact with the marking on one or more of the strips.
  • the signal-free current in the closed circuit is switched off when the bending beam is pivoted through such a large angle that the element which opens the switch reaches the contact whose parallel contact opens at the marking of the bending strip currently attached to the clamping beam is.
  • Fig. 1 denotes a lower beam attached to the machine frame
  • 2 denotes a clamping beam, which can be moved by hand or automatically, e.g. can be hydraulically moved up and down to create the opening for inserting and fastening the sheet during the machining process.
  • the clamping cheek is provided with an exchangeable bending rail or bending strip 3.
  • This bending strip 3 is essential to the invention and is therefore described in more detail with reference to FIGS. 3 and 4 of the drawings, which show part of the clamping beam and the bending strip on an enlarged scale.
  • the bending beam 4 with a bending cheek is designated, which can pivot or rotate about an axis, which is defined by the center of the circle 5 in Fig. 1.
  • the bending beam can be swiveled electrically, hydraulically or pneumatically.
  • the drive mechanism is not part of the invention and is therefore not described in detail here. It can be found in DE-B-1 076 608 mentioned above, which deals with a hydraulically driven folding machine. It is clear to the person skilled in the art that the rack and pinion drive shown in this publication can be replaced, for example, by a worm gear which is driven by an electric motor.
  • the clamping cheek 2 which can be seen in FIG. 1 is shown in cross section on an enlarged scale, so that the essential construction details can be clearly seen.
  • the clamping cheek has a solid front edge beam 6, which is welded to a sheet metal frame 7.
  • the front edge beam carries the bending strip 3, which in the embodiment shown in FIG. 3 has an acute-angled bending edge or nose 8, the upper and lower boundary surfaces of which form an acute angle of approximately 45 ° and which therefore bend the edge of the sheet by a maximum 135 °, but actually a little less.
  • the bending strip 3 has a semicircularly rounded bending edge 8, which allows the sheet metal edge to be bent over by 180 °.
  • the bending strips 3, of which those with differently shaped bending edges can also be provided, are interchangeably attached to the lower edge beam 6 of the clamping beam 2, so that they can be interchanged and bending strips with different bending edges can be used in the bending machine.
  • the edge bar 6 has in its lower, rear area one or more recesses 10, in which a plurality of switches 11 are arranged at a lateral distance from one another, the actuating member 11 a of which is directed forward.
  • Each of the switches 11, of which only one can be seen in FIGS. 3 and 4 is assigned to a bending strip 3, and there are as many switches 11 in the recess 10 as there are differently shaped bending strips, which are optionally on the edge beam 6 of the Clamping cheek 2 can be attached.
  • Each terminal strip 3 has at its rear edge a rear projecting part 16 which engages in the recess 10 of the edge beam 6 and acts on the actuators 11 a of all switches 11 which are not assigned to the bending strip 3 attached to the edge beam 6 (FIG. 3).
  • the bending strip 3 has a recess 12, so that the actuator 11 a of this switch 11 is not acted upon, but this switch in its Rest position remains (Fig. 4).
  • Fig. 2 shows a flow diagram for a circuit that can be used in a folding machine.
  • a closed circuit for a control element which in a simple form can be an electromagnetic switch or a solenoid valve
  • a plurality of switches 13 connected in series are provided, which are normally closed, so that a current flows through the control element.
  • Each of the switches 13, with the exception of the last one in the series, is connected in parallel with the contacts of switches 11, which are shown in FIGS. 3 and 4.
  • These switches are closed, with the exception of one for which the bending strip 3 used in each case has an off took.
  • the cam 15 opens the next contact 13V2 as soon as the bending cheek has reached the bending angle V2, and so on all other contacts 13V3 ... n which are assigned to further bending angles.
  • the successive opening of the contacts is indicated in Fig. 2 by the vertically downward arrows in the upper switch chain.
  • Opening the contacts 13V1 .. n does not interrupt the current flow, however, unless the parallel contact 11 assigned to the respective contact 13 is also opened or the last contact in the row is reached, as long as the parallel connected contacts 11 are closed, a current flow from the control element 18 is possible via the lower switch chain 11 connected in parallel.
  • This current flow diagram since it is a closed circle, gives greater security due to the fact that the largest bending angle, which is determined by the marking on the bending strip described and in the exemplary embodiment shown and described here, is a recess at the rear edge of the bending strip, cannot be exceeded during operation, which could damage the machine.
  • S 1 , S z and S 3 mean three different types of bending strips with which bending angles of 135 ° or 160 ° and or 180 ° are carried out can.
  • 14 designates a cam disk which sits on the shaft of the bending cheek 4 and carries a single cam 15 which actuates three switches 13V1, 13V2 and 13V3 in succession, which are arranged on a circular arc partially surrounding the cam disk 14 in such a way that the cam 15 actuates the switch 13V1 when the cam disk 14 has rotated through an angular amount of 135 °, then opens the switch 13V2 when the cam disk has completed an angular rotation of 160 ° and opens the switch 13V3 when the cam disk 14 has rotated an angular rotation of 180 ° executed.
  • the switches 11 S and 11 S 2 arranged in the recess 10 of the edge beam 6 are connected to one another via the switches 13V1 and 13V2.
  • the switch 11 S is opened if there is a type S bending strip in the machine which is assigned to this switch and it can be seen that the current flow is interrupted from + to - if the cam 15 after a swivel angle of 135 ° the switch V1 opens, since the switch 11 S connected in parallel with it is open.
  • the rear edge of the bending strip S 3 which allows a bending angle of 180 °, has no recess at all.
  • both switches 11 S and 11 S 2 are closed, since their actuators 11 are pressed in from the rear edge of the bending bar 3.
  • the circuit is then kept closed via these switches, even if the cam 15 runs past the switches 13V1 and 13V2 and opens them.
  • the circuit is only interrupted when the cam 15 opens the switch 13V3 after an angular rotation of the cam disk 14 by 180 °. So when the bending rail S 3 is in the machine, both switches 11 S and 11 S 2 are closed and the current is only interrupted when the disk 14 reaches a bending angle of 180 °.
  • a bit can be represented by the presence or absence of a recess at a specific point on the bending strip or by a template with an insulated or conductive area.
  • the bending strips can also be part of a code converter known per se if a part of its rear edge is given a key profile which, when the strip is inserted into the bending machine, adjusts a plurality of displaceable rods arranged in the clamping cheek and which, by displacement in a manner known per se, is one allow displacement of several crossbars.

Landscapes

  • 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)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
EP83110085A 1982-10-11 1983-10-08 Schwenkbiegemaschine Expired EP0106298B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83110085T ATE24129T1 (de) 1982-10-11 1983-10-08 Schwenkbiegemaschine.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK448382A DK148470C (da) 1982-10-11 1982-10-11 Kantbukkemaskine
DK4483/82 1982-10-11

Publications (3)

Publication Number Publication Date
EP0106298A2 EP0106298A2 (de) 1984-04-25
EP0106298A3 EP0106298A3 (en) 1984-07-18
EP0106298B1 true EP0106298B1 (de) 1986-12-10

Family

ID=8133941

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83110085A Expired EP0106298B1 (de) 1982-10-11 1983-10-08 Schwenkbiegemaschine

Country Status (5)

Country Link
US (1) US4594867A (da)
EP (1) EP0106298B1 (da)
AT (1) ATE24129T1 (da)
DE (1) DE3368212D1 (da)
DK (1) DK148470C (da)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2468381C (en) * 2003-06-10 2007-12-04 Perry Mcadam Tool kit and method for working sheet metal trims
US7434438B2 (en) * 2005-06-28 2008-10-14 Clarence Kornelsen Folding brake
EP3931498A4 (en) 2019-03-01 2022-11-23 HVAC Inventors/Systemation, Inc. APPARATUS AND METHOD FOR FORMING CONDUIT FLANGES AND DUCT SYSTEMS
CN112103883B (zh) * 2020-09-16 2021-12-21 镇江茗驰电气有限公司 一种阻燃防水母线槽及其制备装置

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US348423A (en) * 1886-08-31 Gutter-beading device
US2394193A (en) * 1942-08-24 1946-02-05 Annie A Mccabe Flanging machine
US2699812A (en) * 1951-01-31 1955-01-18 Four Way Awning Company Sheet bending apparatus
DE1076608B (de) * 1957-09-13 1960-03-03 Reinhardt & Adam Maschinen Und Anschlageinstellung fuer Abkanteinrichtungen od. dgl.
US3299681A (en) * 1960-03-22 1967-01-24 Baldwin Lima Hamilton Corp Program controlled tube bender
DE6607061U (de) * 1967-04-28 1971-01-14 Hermann Raffelsiefer Fa Programmschalter fuer abkantmaschinen
US3717016A (en) * 1970-05-13 1973-02-20 Peddinghaus Carl Ullrich Dr Bending machine
US3726120A (en) * 1971-12-02 1973-04-10 Hugert Mfg Co Ductwork forming machine
DE2704399A1 (de) * 1977-02-03 1978-08-10 Fastenrath Fasti Werk Vorrichtung zur biegewinkeleinstellung an schwenk-biegemaschinen
JPS5456969A (en) * 1977-10-14 1979-05-08 Komatsu Mfg Co Ltd Automatic metal mold exchanging apparatus of press brake
US4283929A (en) * 1979-07-16 1981-08-18 Danly Machine Corporation Coded automatic counterbalance control

Also Published As

Publication number Publication date
EP0106298A3 (en) 1984-07-18
DK448382A (da) 1983-05-25
DE3368212D1 (en) 1987-01-22
EP0106298A2 (de) 1984-04-25
DK148470C (da) 1985-12-16
ATE24129T1 (de) 1986-12-15
DK148470B (da) 1985-07-15
US4594867A (en) 1986-06-17

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