US20100229619A1 - Press brake for bending sheets - Google Patents

Press brake for bending sheets Download PDF

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Publication number
US20100229619A1
US20100229619A1 US12/721,992 US72199210A US2010229619A1 US 20100229619 A1 US20100229619 A1 US 20100229619A1 US 72199210 A US72199210 A US 72199210A US 2010229619 A1 US2010229619 A1 US 2010229619A1
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United States
Prior art keywords
wedge
wedges
press brake
brake according
relative
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Abandoned
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US12/721,992
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English (en)
Inventor
Bjarne Hansen
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Amada Europe SA
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Amada Europe SA
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Publication date
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Assigned to AMADA EUROPE reassignment AMADA EUROPE ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HANSEN, BJARNE
Publication of US20100229619A1 publication Critical patent/US20100229619A1/en
Abandoned legal-status Critical Current

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    • 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
    • B21D5/0272—Deflection compensating means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/007—Means for maintaining the press table, the press platen or the press ram against tilting or deflection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/04—Frames; Guides

Definitions

  • the present invention relates to a bending press or “press brake” having tables with controlled deformation.
  • Bending presses are machine tools of a type that is itself well known.
  • the machine tool comprises a lower table 12 and an upper table 14 that is movable relative to the lower table 12 .
  • the lower table 12 is stationary and the upper table 14 is suitable for being moved towards the lower table 12 under drive from actuators V 1 and V 2 that act on the ends 14 a and 14 b of the upper table 14 .
  • the lower table 12 has its free edge 12 a fitted with fastener means 16 for fastening bending matrices 18 .
  • the edge 14 c of the upper table 14 is fitted with fastener means 20 for fastening bending punches 22 .
  • a metal sheet or lamination F is placed on the bending matrices 18 of the lower table 12 .
  • the sheet F may be of a length that varies widely depending on the circumstances.
  • the punches 22 mounted on the upper table 14 move towards the sheet placed on the matrices of the lower table.
  • force begins to increase within the sheet as the punch penetrates therein, initially in the elastic range and subsequently in the plastic range, thereby enabling the sheet to be bent permanently.
  • the linear load distributed between the two ends of the tables corresponds to the upper table being deformed along a line in the form of a concave arc with deformation maximas close to the midplane of the table.
  • these solutions involve providing slots, such as the slots 24 and 26 shown in FIG. 1 , that are formed in the lower table 12 symmetrically about the midplane P′P of the press. These slots 24 , 26 then define a central zone 28 of the lower table 12 that is slot-free and that presents a length b, each of the two slots 24 and 26 being of length a.
  • An object of the present invention is to remedy these two problems by proposing to dispose at least one stopper in each of the slots 24 , 26 , which stopper is made up of two elements or wedges that have first surfaces fastened to respective ones of the edges of the slots, and second surfaces adapted for localized mutual contact substantially in the centers of the wedges, in a manner such as to ensure excellent transmission of the bending force from the top edges of the slots to the bottom edges of the slots.
  • the invention thus provides a press brake for bending at least one metal sheet, said press brake comprising:
  • said press brake presenting a vertical midplane, one of said tables having, through its entire thickness, two slots disposed symmetrically about the midplane, each slot having a first edge and a second edge, and an open first end opening out in a side edge of the table, as well as a closed end;
  • each stopper comprising a first wedge having a first end secured to the first slot edge and a second end forming a first surface, and a second wedge having a first end secured to the second slot edge and a second end forming a first surface;
  • the first surface of at least one of the first and second wedges has a central portion that is domed or protuberant relative to the other portions of said surface so that the contact between the first and the second wedges is established essentially over said central portion.
  • the expression “secured to the first/second edge” is used to mean that the wedge in question is connected to the first or second edge, it being understood that said wedge may be movable relative to said edge of the slot.
  • FIG. 1 shows a press brake having two slots situated on respective sides of the midplane P′P and extending from opposite sides;
  • FIG. 2 is a diagrammatic view showing an embodiment of a stopper that is made up of two wedges of the invention, one of the wedges being fastened to the top edge of a slot 24 or 26 , and the other being fastened to the bottom edge of the slot 24 or 26 ;
  • FIG. 3 is a diagrammatic view of two stoppers provided with a motor-driven control system for controlling the value of the clearance associated with the stoppers;
  • FIGS. 4 to 7 are diagrammatic views of embodiments of a stopper of the invention, made up of two wedges that are initially in mutual contact;
  • FIG. 8 is a side view of a stopper wedge of the invention.
  • FIGS. 9 to 12 show various embodiments of the first surface or contact surface of a stopper wedge of the invention.
  • FIG. 13 diagrammatically shows the force fields or pressure fields passing through the wedges of a stopper of the invention, when a bending force is applied to the metal sheet F causing contact and a force F 0 between the wedges;
  • FIG. 14 is a perspective view of a wedge whose first surface or contact surface is made up of three portions.
  • FIG. 15 is a side view in section of two wedges, one below the other, that are identical to the wedge of FIG. 14 .
  • FIG. 2 is a section view of two wedges 28 , 29 of a stopper 27 of the invention.
  • the two wedges 28 , 29 have respective contact first surfaces 28 ′, 29 ′ that, prior to application of a bending force F 0 , present clearance j between them, as also shown in FIGS. 5 and 15 .
  • Each of the wedges 28 , 29 is mounted on a respective support 40 , 41 connected to a respective edge 24 ′, 26 ′ or 24 ′′, 26 ′′ of a respective one of the slots 24 and 26 .
  • the function of each wedge 28 , 28 ′, 29 , 29 ′/stopper 27 is to control the extent to which the edges 24 ′, 24 ′′ and 26 ′, 26 ′′ of each slot 24 , 26 move towards each other when the bending force is applied.
  • At least one of the supports 40 or 41 , and optionally both of the supports 40 and 41 is/are mounted to move laterally, i.e. along an axis parallel to the parallel edges 24 ′, 26 ′ and 24 ′′, 26 ′′ of the slots 24 , 26 on which it is mounted.
  • the supports 40 are suitable for being moved by means of the set of actuators 60 , the supports 41 being fastened to the slot edges 24 ′′, 26 ′′ of the lower table 12 .
  • Said supports 40 are moved by means of a set of actuators 60 , shown in FIG. 3 , which set is connected via link arms 61 to the moving supports 10 .
  • the set of actuators 60 is controlled by a remote control unit (not shown in the accompanying figures).
  • the motor-driven movement of the supports 40 , and thus of the wedges 29 makes it possible to adjust the position of at least one of the wedges 29 relative to the wedge 28 , with a view to applying the bending force F 0 .
  • This adjustment defines the value of the clearance j, it being understood that the initial adjustment of the relative positions of the wedges 28 , 29 (before the bending force F 0 ) is applied may also not make provision for any clearance, so that the wedges 28 , 29 are in abutment with each other.
  • the clearance j between the wedges 28 , 29 or the relative position of the wedges 28 , 29 can be adjusted to within one hundredth of a millimeter by means of the set of actuators 60 .
  • FIG. 8 shows a wedge 28 , 29 in which tapped orifices 71 , 72 , 73 can be seen (the orifices 71 , 72 are seen end-on, while the orifice 73 , situated in an adjacent face, is shown in dashed lines in the thickness of the wedge), the orifices being designed to enable the wedge 28 or 29 to be fastened to a moving support 40 or to a stationary support 41 by conventional mechanical means, such as a screw or a threaded rod.
  • the supports 40 are provided with slots or holes 62 that extend linearly to define the axes along which the moving supports 40 move, inside which slots guide pins 63 are disposed that are adapted to fit said slots 62 .
  • the movement of the supports 40 and of the wedges 29 is ideally parallel to the edges 24 ′, 26 ′ of the slots 24 , 26 . It should be noted that, advantageously, the edges 24 ′, 24 ′′, and 26 ′, 26 ′′ of each of the slots 24 , 26 are parallel, at least at the wedges 28 , 29 /stoppers 27 .
  • the first surface 28 ′, 29 ′ of each of the wedges 28 , 29 advantageously has an inclination relative to the axes or to the planes of the parallel edges 24 ′, 26 ′ and 24 ′′, 26 ′′ of the slots 24 , 26 .
  • This inclination of the first surface 28 ′, 29 ′ of each of the wedges 28 , 29 lies in the range 1% to 30%, as a function of the material forming the wedges 28 , 29 , or more exactly of the coefficient of friction of the materials used to constitute the contact surface 28 ′, 29 ′ of each of the wedges 28 , 29 .
  • At least one of the first surfaces, or contact surfaces, 28 ′, 29 ′ of the respective wedges 28 , 29 is provided with a domed or protuberant central portion 30 , 31 so that the contact between the first and the second wedges 28 and 29 is established essentially over said central portion 30 or 31 .
  • This domed or protuberant central portion 30 , 31 may be of various shapes and may be present on one of the two wedges 28 or 29 only, or on both of the wedges 28 , 29 .
  • the contact between the wedges 28 , 29 may consist of contact at a point or substantially at a point, of contact along a line, or of contact over an area.
  • each of the wedges 28 and 29 has a domed or protuberant central portion 30 , 31 , which portions form the contact zone of the two wedges 28 , 29 .
  • the bottom wedge 29 is situated closer to the open end 26 a of the slot 26 than is the top wedge 28 so that there is a slight lateral offset between the two wedges 28 , 29 .
  • the first surface 28 ′, 29 ′ of each of the two wedges 28 , 29 consists of a spherical surface, but the vertex S of the spherical surface of each of the two wedges 28 , 29 is not situated exactly in the center of the first surface 28 ′ or 29 ′.
  • the two wedges 28 , 29 are offset slightly laterally relative to each other so that the contact between the two wedges, initially and/or while the bending force F 0 for bending the sheet F is being applied, makes contact possible at the central portions 30 , 31 .
  • this manner of arranging the wedges 28 , 29 relative to each other is a function of the spherical surfaces of the two first surfaces 28 ′, 29 ′ of the wedges 28 , 29 , but it is also a function of the flexing of the top portion 12 c of the lower table 12 , and thus of the extent to which the top wedge 28 itself moves.
  • the vertex of the domed or protuberant central portion 30 , 31 is considered relative to a plane P 0 joining two opposite edges 80 , 81 of the wedge 28 or 29 , which plane P 0 corresponds to the inclination of the wedge 28 , 29 .
  • the vertex S is the point of the domed or protuberant central portion 30 , 31 that is at the furthest distance (“protrusion”) from the plane P 0 .
  • This plane P 0 is shown in FIGS. 14 and 15 that show a last embodiment of the invention. As can be seen in FIG. 14 , the plane P 0 is the plane joining the two opposite edges 80 , 81 .
  • the vertex S of the domed or protuberant central portion 30 , 31 may be located at one end of said portion, as shown in FIG. 14 .
  • the maximum height of the vertex S is referenced h.
  • substantially the entire domed or protuberant central portion 30 , 31 is at the height h relative to the plane P 0 .
  • the vertex S of the protuberant portion 30 , 31 does not necessarily coincide with the point of the first surface 28 ′, 29 ′ that is furthest away from the slot edge 26 ′, 26 ′′ to which the wedge 28 , 29 is fastened.
  • FIG. 5 shows a variant of FIG. 4 .
  • the bottom wedge 29 is situated further away from the open end 26 a than is the top wedge 28 , so that, once again, there is a slight lateral offset between the two wedges 28 and 29 , but the offset is the reverse of the lateral offset of the wedges 28 , 29 shown in FIG. 4 .
  • the first surfaces 28 ′, 29 ′ present clearance j between them.
  • the arrangement of the domed central portion 30 , 31 of each of the first surfaces 28 ′, 29 ′ of each of the wedges 28 , 29 and the relative lateral offset of the two wedges 28 , 29 are chosen so that, while the bending force is being applied to the metal sheet F, the two wedges 28 , 29 are in contact over their respective domed or protuberant central portions 30 , 31 .
  • FIGS. 6 and 7 show the bending force F 0 for bending the metal sheet F that essentially causes the top portion 12 c of the lower table 12 to flex so that the top edge 26 ′′ of the slot 26 moves closer to the bottom edge 26 ′ of the same slot 26 .
  • the wedges 28 and 29 are offset laterally relative to each other.
  • only wedge 29 has a first surface 29 ′ with a domed or protuberant central portion 31 , e.g. a spherical surface or a plane protuberant surface.
  • the contact between the two wedges 28 , 29 takes place, for the wedge 29 , over its domed or protuberant portion 31 .
  • the wedge that is provided with the central portion 31 it is advantageous for the wedge that is provided with the central portion 31 to be the bottom wedge 29 that is fastened to the bottom edge 26 ′ of the slot 26 .
  • the wedges 28 , 29 with their protuberant central portions 30 and/or 31 and their relative lateral offset are designed to compensate for the non-parallelism of the edges 24 ′, 24 ′′ and 26 ′, 26 ′′ of the slots 24 and 26 .
  • FIG. 7 is analogous to the embodiment shown in FIG. 4 , but FIG. 7 shows the top portion 12 c of the lower table flexing while the bending force F 0 is being applied, and said force being transmitted to the lower table 12 .
  • FIG. 8 shows a first surface 28 ′, 29 ′ seen from the side, on which surface it is difficult to see with the naked eye that there is a domed or protuberant central portion 30 , 31 .
  • the first surface 28 ′, 29 ′ of the wedge 28 , 29 is a spherical surface that has a radius of curvature that is extremely large relative to the length of the wedge 28 , 29 .
  • the protrusion 8 i.e. the maximum height of the central portion 30 , 31 relative to the plane surface of the first surface, which plane surface is defined by the straight line joining the opposite ends 80 , 81 of the first surface 28 ′, 29 ′, lies approximately in the range 0.05 mm to 0.25 mm.
  • the domed or protuberant portion 30 , 31 thus has a maximum height or protrusion lying in the range 0.05% of the length (longest surface dimension) of the first surface 28 ′, 29 ′ to 0.4% of said length (when the inclination of the first surface is not too large, it can be considered, by approximation, that the length of each of the wedges is equal to the length of its first surface), said maximum height or protrusion preferably lying in the range 0.1% of the length of the first surface 28 ′, 29 ′ of the wedge 28 , 29 to 0.3% of said length.
  • the difference in height of the domed or protuberant central portion 30 , 31 is often not perceptible with the naked eye, and that the accompanying figures intentionally magnify the central portion 30 , 31 for reasons of simplification and of understanding.
  • FIG. 9 shows a wedge 28 , 29 having a first surface 28 ′, 29 ′ that is substantially cylindrical and dished.
  • the first surface 28 ′, 29 ′ of the wedge 28 , 29 is provided with a dome constituting the domed or protuberant central portion 30 , 31 of the wedge 28 , 29 .
  • This dome may consist of a spherical surface that is protuberant relative to the first surface 28 ′, 29 ′ presenting a section of substantially cylindrical shape.
  • the wedge 28 , 29 shown in FIG. 10 has an inclined cylindrical first surface 28 ′, 29 ′.
  • the center O of the sphere, of which the first surface 28 ′, 29 ′ of the wedge 28 or 29 forms a portion, is offset relative to the vertical V starting from the center C of the first surface 28 ′, 29 ′ (this vertical V intersects the bottom plane formed by the first end secured to the first edge of the slot 24 ′ or 26 ′).
  • the centre C of the first surface 28 ′ or 29 ′ of the wedge 28 or 29 constitutes the point of contact with the first surface 28 ′ or 29 ′ of the other wedge 28 or 29 .
  • the contact with the first surface 28 ′, 29 ′ of the other wedge 28 or 29 is contact at a point or substantially at a point.
  • the area of contact 28 ′, 29 ′ between the two wedges 28 , 29 is thus very small and, taking account of the manufacturing tolerances for the wedges 28 , 29 , and of the materials used, it represents about 1 square millimeter (mm 2 ).
  • this point or substantially point contact between the two wedges 28 , 29 may optionally take place at the center C of each of the first surfaces 28 ′, 29 ′ of the wedges 28 , 29 but, as explained above, the contact between the two wedges 28 , 29 depends on their respective inclinations and on their relative offset, as well as on the movement of the top wedge 28 while the bending force F 0 for bending the metal sheet F is being applied.
  • FIG. 11 shows a variant embodiment of the first surface 28 ′, 29 ′ of the wedge 28 , 29 .
  • the central portion 30 , 31 consists of a plane surface.
  • This central portion 30 , 31 is in the form of a rectangular or square surface representing in the range 5% of the total area of the first surface 28 ′, 29 ′ to 25% of said total area, and preferably in the range 10% of said total area to 15% thereof.
  • the first surface 28 ′, 29 ′ of the wedge 28 , 29 has four inclined plane peripheral portions 33 , 34 , 35 , and 36 extending from respective ones of the four edges of the first surface 28 ′, 29 ′ to the central portion 30 , 31 .
  • the contact with the first surface 28 ′, 29 ′ of the other wedge 28 , 29 , presenting a plane contact surface is area contact between the two wedges 28 and 29 .
  • FIGS. 14 and 15 also show an embodiment in which the contact between the first two surfaces 28 ′, 29 ′ of the two wedges 28 , 29 is area contact.
  • the first contact surface 28 ′, 29 ′ is substantially an inclined surface, i.e. the opposite edges 80 , 81 have different heights.
  • the first surface 28 ′, 29 ′ of the wedges 28 , 29 has three successive segments 40 , 30 or 31 , and 42 , extending over the entire width of the wedge 28 , 29 , and each having a different inclination; the inclinations of the segments 40 , 30 / 31 , and 42 increasing going from the segment 40 to the segment 42 .
  • the intermediate or central segment constitutes the central or protuberant portion 30 , 31 .
  • the central portion 30 , 31 presents a maximum height h of about 0.1 mm.
  • the two wedges 28 , 29 that are offset slightly relative to each other are identical but the orientations of their respective first surfaces 28 ′, 29 ′ are opposite so that only the central portions 30 , 31 face each other and are substantially parallel. Because of the offset between the two wedges 28 , 29 , only a portion of each of the central portions 30 , 31 comes into contact, of the area contact type, with the respective portion of the other central portion. It should be noted that, in this example, the two wedges 28 , 29 present clearance j in the initial state.
  • FIG. 12 shows the third possible mode of contact between the two wedges 28 , 29 , namely linear contact, the first two modes being point or substantially point contact, and area contact.
  • the first two modes being point or substantially point contact, and area contact.
  • the wedge 28 has a protuberant central portion 31 .
  • the first surfaces 28 ′, 29 ′ of the wedges 28 , 29 are cylindrical surfaces, but while the first surface 28 ′ lies on the inside of a cylinder so that the first surface 28 ′ is protuberant relative to the plane/axis joining the opposite edges of the wedge 28 , the first surface 29 ′ lies on the outside of a cylinder so that the first surface 29 ′ forms a recess relative to the plane/axis joining the opposite edges 80 , 81 .
  • the center O 1 of the cylinder on which the first surface 28 ′ lies is closer to said surface 28 ′ than the center O 2 of the cylinder on which the first surface 29 ′ lies.
  • the radius of the cylinder of which the first surface 28 ′ forms a portion is smaller than the radius of the cylinder of which the first surface 29 ′ forms a portion. That is why only the vertex of the central portion 30 of the first surface 28 ′ comes into contact over the entire width of the first surface 29 ′ of the wedge 29 , so that the contact between the two wedges 28 , 29 is linear contact.
  • FIG. 13 shows the force lines that are exerted while the bending force F 0 for bending the metal sheet F is being applied.
  • the force lines converge or are concentrated from the first end of the wedge 28 that is fastened to the edge 26 ′′ of the slot 26 towards the protuberant central portion 30 of the first surface 28 ′ of the wedge 28 that is in contact with the protuberant central portion 31 of the first surface 29 ′ of the wedge 29 ; these force lines then spread out over the entire width of the wedge 29 .
  • the first surfaces 28 ′, 29 ′ of the wedges 28 , 29 present spherical or cylindrical surfaces so that the contact is respectively point contact, substantially point contact, or linear contact.
  • the wedges 28 , 29 may be made of hardened steel while the lower table 12 may be made of mild steel, thereby, in the absence of plastic deformation, making it possible for stress to be high between the wedges 28 , 29 but low between the wedges 28 , 29 and the lower table 12 .
  • the contact between the first surfaces 28 ′, 29 ′ that is described as being point contact or linear contact is the first contact during or at the beginning of application of the force F 0 because, after this point or linear contact, the pressure from the top wedge 28 on the bottom wedge 29 is such that the first surfaces 28 ′, 29 ′ of the wedges 28 , 29 enter at least an elastic deformation stage so that a contact zone that is larger is reached.
  • the force F 0 e.g. a force of 200 kilonewtons (kN)
  • the contact zone is preferably approximately in the range 20% of the total area of each of the first surfaces 28 ′, 29 ′ of the wedges 28 , 29 to 50% of said total area.
  • the domed or protuberant central portion 30 , 31 may include the center C of the first surface 28 ′, 29 ′ as the center of said central portion 30 , 31 so that the protrusion of the domed portion 30 , 31 coincides with the geometrical center of the first surface 28 ′, 29 ′ of the wedge 28 , 29 , but it is also possible to make provision for said domed or protuberant central portion 30 , 31 to be offset slightly relative to the center C of the first surface 28 ′, 29 ′: such an embodiment is, for example, shown in FIG.
  • This eccentricity or offset of the protrusion of the domed or protuberant central portion 30 , 31 relative to the center C of the first surface 28 ′, 29 ′ may thus lie in the range 0% of the length of the wedge 28 , 29 to 40% of the length thereof.
  • the wedges 28 , 29 are identical, i.e. their dimensions are mutually equal and their first surfaces 28 ′, 29 ′ are mutually identical, both in shape and in size.
  • the two wedges 28 , 29 not to be identical, i.e. essentially for their first surfaces 28 ′, 29 ′ not to be the same, and optionally for only one of the first surfaces 28 ′, 29 ′ of said wedges 28 , 29 to have a domed or protuberant central portion 30 , 31 .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Braking Arrangements (AREA)
US12/721,992 2009-03-13 2010-03-11 Press brake for bending sheets Abandoned US20100229619A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0951610 2009-03-13
FR0951610A FR2942981B1 (fr) 2009-03-13 2009-03-13 Presse plieuse pour le pliage de feuilles

Publications (1)

Publication Number Publication Date
US20100229619A1 true US20100229619A1 (en) 2010-09-16

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US12/721,992 Abandoned US20100229619A1 (en) 2009-03-13 2010-03-11 Press brake for bending sheets

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US (1) US20100229619A1 (fi)
JP (1) JP2010214469A (fi)
CN (1) CN101837400A (fi)
AT (1) AT507944B1 (fi)
CH (1) CH700556B1 (fi)
DE (1) DE102010015920A1 (fi)
ES (1) ES2382282B1 (fi)
FI (1) FI20105240A (fi)
FR (1) FR2942981B1 (fi)
GB (1) GB2468591B (fi)
IT (1) IT1398894B1 (fi)
NL (1) NL2004385C2 (fi)
RU (1) RU2429096C1 (fi)
SE (1) SE534092C2 (fi)
TW (1) TW201039938A (fi)

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Publication number Priority date Publication date Assignee Title
US20140190228A1 (en) * 2011-05-26 2014-07-10 Wila B.V. Method and Device for Compensating Deviations during a Deforming Operation between Two Beams of a Press
WO2020142028A1 (en) * 2018-12-31 2020-07-09 Durmazlar Makina Sanayi Ve Ticaret Anonim Sirketi A bending machine
US20240082901A1 (en) * 2021-04-15 2024-03-14 Bystronic Laser Ag Bending machine for bending workpieces, in particular a press brake

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Publication number Priority date Publication date Assignee Title
AT512174B1 (de) * 2012-02-13 2013-06-15 Trumpf Maschinen Austria Gmbh Biegepresse mit verstellbarem balkenelement
CN104476799B (zh) * 2014-12-12 2016-10-05 苏州中拓专利运营管理有限公司 一种秸秆粉碎生产线中用压块成型设备
JP6566231B1 (ja) * 2018-03-30 2019-08-28 Ｊｆｅスチール株式会社 鋼板の端曲げ方法および装置並びに鋼管の製造方法および設備
FR3095355B1 (fr) * 2019-04-29 2021-10-29 Gaztransport Et Technigaz Système de pliage pour former une ondulation dans une pièce et procédé d’utilisation du dispositif
JP7369636B2 (ja) * 2020-02-17 2023-10-26 株式会社アマダ プレスブレーキ及び曲げ加工方法

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JP2010214469A (ja) 2010-09-30
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GB2468591B (en) 2011-04-13
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CH700556A2 (fr) 2010-09-15
GB201004075D0 (en) 2010-04-28
ITTO20100188A1 (it) 2010-09-14
SE1050226A1 (sv) 2010-09-14
CH700556B1 (fr) 2011-02-15
ES2382282B1 (es) 2013-05-27
ES2382282A1 (es) 2012-06-06
AT507944A2 (de) 2010-09-15
AT507944B1 (de) 2011-09-15
RU2429096C1 (ru) 2011-09-20
NL2004385A (en) 2010-09-14
CN101837400A (zh) 2010-09-22
IT1398894B1 (it) 2013-03-21
SE534092C2 (sv) 2011-04-26
NL2004385C2 (en) 2013-10-29
FR2942981B1 (fr) 2011-04-08
DE102010015920A1 (de) 2010-11-04
TW201039938A (en) 2010-11-16
FI20105240A (fi) 2010-09-14

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