EP4074432A1 - Machine à plier permettant de plier des pièces, en particulier presse plieuse - Google Patents

Machine à plier permettant de plier des pièces, en particulier presse plieuse Download PDF

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Publication number
EP4074432A1
EP4074432A1 EP21168657.1A EP21168657A EP4074432A1 EP 4074432 A1 EP4074432 A1 EP 4074432A1 EP 21168657 A EP21168657 A EP 21168657A EP 4074432 A1 EP4074432 A1 EP 4074432A1
Authority
EP
European Patent Office
Prior art keywords
lower beam
tool holder
bending
central element
bending machine
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Withdrawn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
EP21168657.1A
Other languages
German (de)
English (en)
Inventor
Lars WOIDASKY
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.)
Bystronic Laser AG
Original Assignee
Bystronic Laser AG
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 Bystronic Laser AG filed Critical Bystronic Laser AG
Priority to EP21168657.1A priority Critical patent/EP4074432A1/fr
Priority to EP22722814.5A priority patent/EP4323129A1/fr
Priority to JP2023549030A priority patent/JP2024506699A/ja
Priority to PCT/EP2022/060011 priority patent/WO2022219120A1/fr
Priority to US18/287,000 priority patent/US20240082901A1/en
Priority to CN202280017359.2A priority patent/CN116887931A/zh
Publication of EP4074432A1 publication Critical patent/EP4074432A1/fr
Withdrawn legal-status Critical Current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
    • B21D5/02—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
    • B21D5/02—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
    • B30B15/02—Dies; Inserts therefor; Mounting thereof; Moulds
    • B30B15/026—Mounting of dies, platens or press rams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/04—Bending sheet metal along straight lines, e.g. to form simple curves on brakes making use of clamping means on one side of the work

Definitions

  • the invention relates to a bending machine for bending workpieces and in particular to a press brake.
  • Bending machines include a lower beam and an upper beam for bending or bending workpieces.
  • On the lower beam there is a tool holder or tool table on which lower tools are attached.
  • the upper beam with the upper tools attached to it exerts a force on the corresponding workpiece, which is arranged on the tool holder between the upper beam and the lower beam. This force also causes an undesirable downward deflection of the lower beam, which negatively affects the bending result.
  • active crowning techniques In order to avoid deflection of the lower beam during a bending process, active crowning techniques are known in which a force is actively introduced during the bending process counter to the direction of deformation of the lower beam, e.g via hydraulic cylinder. This is intended to eliminate the resulting deformation of the lower beam when bending.
  • active methods have the disadvantage that they result in relatively high production costs, since active crowning generally requires sensors and suitable drives.
  • the lower beam is suitably adapted in advance in the load level to the deformation to be expected during bending, e.g. by milling a curved surface or by placing appropriate plates or wedges underneath.
  • press brakes are known in which slots are provided in the lower beam in order to keep the relative deformations of the lower beam parallel to the bending line during bending.
  • the deformation of the lower beam can be limited by stops in the area of the slots.
  • the object of the invention is to create a bending machine in which deformation of the lower beam during bending is counteracted without the mechanical stability of the bending machine being significantly impaired.
  • the bending machine serves to bend workpieces and in particular sheet metal.
  • the bending machine is a press brake.
  • the machine includes a lower beam and an upper beam for deforming a workpiece by bending along a bending line extending in a widthwise direction of the bending machine.
  • the corresponding workpiece which is positioned between the lower beam and the upper beam, is bent by the upper beam exerting a force on the lower beam.
  • a tool holder in particular a tool table, is provided on the lower beam for accommodating bending tools, it also being possible for the tool holder to be designed in one piece with the lower beam.
  • Each widthwise end of the tool holder is associated with a recessed portion formed in the widthwise direction of the lower beam so as to overlap each end. If appropriate, this overlap can also only consist in the fact that a corresponding end of the tool holder coincides with the end of the associated recessed area.
  • the recessed area serves to reduce the flexural rigidity of the lower beam at the edges of the tool holder.
  • the recessed areas are arranged mirror-symmetrically with respect to the central axis of the lower beam in the width direction.
  • top or bottom or above or below e.g. upper edge
  • these terms always refer to the vertical top-bottom direction in the operating position of the bending machine, i.e. the position of its intended position Use.
  • the lower beam of the bending machine comprises a central element, in particular plate-shaped, and at least one, in particular plate-shaped, side element, all of which are arranged adjacent to one another in the thickness direction of the lower beam.
  • the recessed areas defined above are in the center member and/or widthwise adjacent to the center member and preferably provided only at these points.
  • the concept of the recessed area is to be understood broadly. In particular, it can comprise a coherent section, but it can also consist of a plurality of separate partial areas. In the case of several partial areas, at least one partial area and preferably each partial area is designed to overlap with the respective end of the tool holder.
  • the cut-out area can be at least partially and optionally also completely a cut-out area without material of the central element.
  • the cut-out area can be at least partially and optionally also completely a section with a lower material thickness than in the remaining part of the central element.
  • the lower beam of the bending machine includes a central area under a section of the tool holder that is central in the width direction (i.e. directly below the central section), with a force being introduced via the tool holder in the central area both into the central element and into the at least one during a bending process of a workpiece page element is done.
  • a middle section of the tool holder is to be understood as meaning a section that encompasses the center point of the tool holder in the width direction.
  • the lower beam further includes, for each end of the tool holder, a clear area extending under the tool holder (i.e., directly below the tool holder) from each end of the tool holder and including that portion of the recessed area associated with each end that is below the tool holder (i.e., directly below the tool holder).
  • a respective free area is characterized in that the central element and the at least one side element are arranged in this area in such a way that in the respective free area during a bending process of a workpiece at least initially (i.e. at the beginning of the bending process) only a force is introduced into the central element (ie not in the at least one page element).
  • the construction of the lower beam in the form of a central element and at least one side element ensures a stable mechanical construction of the lower beam. Furthermore, a reinforced central area, in which force is introduced during a bending process of a workpiece via the tool holder both into the central element and into the at least one side element, counteracts deformation of the lower beam, which is greatest in this area. At the same time, sufficient deformability in the edge regions of the lower beam is ensured by recessed areas in the central element or adjacent to it, so that bending along a straight bending line is ensured overall.
  • the central portion of the tool holder is symmetrically arranged between its widthwise ends.
  • the middle section takes up at least 50% of the overall length of the tool holder in the width direction. This ensures a particularly stable construction of the lower beam.
  • a respective free area (directly) adjoins the central area of the lower beam on each side in the width direction.
  • the bending machine includes a central area and two free areas at the edge. This leads to a mechanically simple construction of the lower beam.
  • recessed areas can be sections with a lower material thickness or also without material of the central element.
  • the recessed areas preferably contain recessed areas in which there is no material of the central element. In this way, a very good formability of the lower beam can be secured in its edge portions. If necessary, exclusively freed-up areas can also be provided as the cut-out areas.
  • At least one recessed area extends downward from a portion located at the upper edge of the central member and where no tool holder is located when the lower beam is viewed from above (i.e., viewed along its thickness direction). and into a free area of the lower cheek. This improves the deformability of the lower beam in its edge sections.
  • the central element is mechanically connected to the at least one side element in the middle area of the lower beam, the mechanical connection being in particular a material connection, preferably a welded connection.
  • the mechanical connection can also consist of another connection or include an (additional) other connection, e.g. via a force fit and/or form fit.
  • the central element and the at least one side element do not necessarily have to be mechanically connected to one another in the middle area of the lower beam, as long as the tool holder touches both the central element and the at least one side element in the middle area and this causes a force to be introduced into both the central element during a bending process of a workpiece as well as in the at least one side element.
  • the mechanical connection extends along the entire length of the central area in the width direction.
  • the mechanical connection is formed on the upper edge of the central element. This ensures a uniform introduction of force into the central element and the at least one side element along the entire central area.
  • the top edge of the central element is particularly accessible, so that the mechanical connection can be provided at this point with little effort.
  • the at least one side element is formed from two side elements, between which the central element is located. This ensures that the bending force is introduced evenly and tilting of the lower beam is avoided.
  • the tool holder rests in its middle section both on an upper edge of the central element and on an upper edge of the at least one side element. This ensures a good introduction of force both into the central element and into the corresponding side element.
  • the tool holder rests on an upper edge of the central element in a respective free area, with an upper edge of the at least one side element being spaced apart from the tool holder in the respective free area.
  • one or more limiting means are formed in a respective free area in order to limit the deformation of the central element during a bending process of a workpiece.
  • at least one limiting means and in particular each limiting means comprises a stop element which is arranged with (mechanical) play in an opening in the central element, the amount of play determining the amount of deformation of the central element up to its limit.
  • the stop element can be a corresponding portion of a bolt which extends through an opening in the central element.
  • At least one limiting means and preferably each limiting means comprises an adjustment means with which the amount of deformation of the central element up to its limitation can be adjusted manually (i.e. manually by an operator) and/or by means of an actuator, e.g. hydraulically or motor-driven .
  • the adjustment means comprises an eccentric, with which the amount of deformation of the central element can be adjusted up to its limit by rotating the eccentric.
  • the adjustment means contains a section which can be rotated about an axis of rotation and whose extension in the radial direction along the circumference around the axis of rotation differs.
  • a corresponding adjustment means can be implemented in a simple manner by means of an eccentric.
  • the opposite edges of the lower beam in the width direction are mechanically connected to a component of a frame of the bending machine. This increases the stability of the bending machine.
  • the lower beam is arranged in its thickness direction adjacent to a preferably one-piece frame plate which has an opening for feeding the workpieces to be bent into the bending machine, there preferably being a mechanical connection between the lower beam and frame plate.
  • the frame plate increases the stability of the bending machine.
  • the frame plate is preferably positioned behind the lower beam in relation to the direction of insertion of the workpiece into the bending machine.
  • FIG. 1 An embodiment of the invention is described below using a bending machine in the form of a press brake.
  • This press brake is shown in a perspective view in 1 shown and denoted by reference numeral 1 there.
  • 1 and 2 a spatial coordinate system for describing the directions of the bending machine is given.
  • the x-direction corresponds to the depth direction of the bending machine and a workpiece to be bent is pushed into the bending machine in the opposite direction to the x-direction.
  • the y-direction is the widthwise direction of the bending machine. Both directions lie in a horizontal plane.
  • the z direction is the vertical direction and corresponds to the height direction of the bending machine.
  • the bending machine 1 includes a frame 2, which includes, among other things, two side stands 3, 3' and a front frame plate 4 and a rear frame plate 4'.
  • the structure of the frame is very good from the perspective view of the 2 visible, in which only the lower beam 12 of the bending machine described below is shown in addition to the frame. Furthermore, the side stand 3 has been omitted for clarity.
  • each of the two frame plates 4 and 4 ' is a one-piece component in which corresponding openings 5 are provided.
  • Two struts 6 are provided in the lower region between the two frame plates 4 and 4'.
  • corresponding anchoring means 8 are formed in the corners of the side stands 3 and 3', via which the bending machine is anchored to the ground.
  • a workpiece or sheet metal is pushed into the bending machine in a horizontal direction via the opening 5 of the front frame plate 4 .
  • the inserted metal sheet is then bent in that the in 1 upper beam 11 shown is moved downwards and presses on the lower beam 12, so that a deformation of the sheet metal lying in between is effected.
  • a hydraulic actuator 9 known per se is used, which is provided in the upper area of the bending machine and is not described in detail. A large part of the actuators is from the 2 worn stiffening plate 7 shown, which has stiffening ribs 701 extending vertically upwards.
  • the hydraulic actuator 9 includes two hydraulic cylinders 10 and 10 'from 1 are evident. The front end of the rod, which can be moved out of the respective cylinders, is received in corresponding openings 11b of the upper beam 11, so that the upper beam can be both pushed down and retracted upwards.
  • the two cylinders 10 and 10' are fixed to respective fixing portions 401 of the front frame plate 4 (see 2 ) and are located according to 1 in corresponding recesses 11a of the upper beam 11. These recesses extend from the top of the upper beam 11 downwards.
  • Lower tools (not shown) on the upper side of the lower beam 12 and upper tools (not shown) on the lower side of the upper beam 11 are used to bring about the desired bending of the sheet metal supplied for the corresponding bending process.
  • the lower tools form what is known as a die, in which a corresponding punch, which is formed by the upper tools, is pressed in via the hydraulic actuator system 9 by lowering the upper beam 11 in order to thereby bring about the bending of the sheet metal lying between them.
  • a tool holder 15 designed as a tool table in this exemplary embodiment, which is provided for fastening the lower tools.
  • the tool holder comprises a thickened middle section 15a and two edge sections 15b with a reduced thickness.
  • the opposite ends of the tool holder 15 in the width direction y are in 1 and 2 denoted by reference numeral 15c.
  • the lower beam 12 comprises three plate-shaped elements 13, 14 and 14', which are arranged parallel to one another in the x-direction. This plate-shaped structure of the lower beam 12 is, inter alia, from 2 and 4 evident. As can be seen there, the lower beam 12 comprises a plate-shaped middle central element 13 which is located between a front plate-shaped side element 14 and a rear plate-shaped side element 14'. On the horizontally running upper edge 13a of the central element 13 (see 3 and 4 ) the tool holder 15 rests along its entire length in the width direction. In the edge portions 15b the tool holder is only in contact with the central element 13, whereas in the central thickened portion 15a it rests on both the central element 13 and the side elements 14, 14'.
  • FIG. 3 shows another top view of the upper beam 12 from the front, with the contour of the central element 13 both in 3 as well as in 4 by dashed lines is indicated.
  • the lower beam 12 extends in the width direction between its two edges 12a and 12b.
  • the side elements 14, 14' In order to hang the lower beam stably on the frame 2, it is rigidly mechanically connected at its edges 12a or 12b via the side elements 14, 14' to the corresponding side stands 3 or 3', preferably via a weld.
  • the rear side of the side element 14 ′ is preferably also rigidly mechanically connected to the front frame plate 4 .
  • the lower beam 12 includes a central area B1 along the width direction and two free areas B2 adjacent thereto.
  • the position and length of the middle area B1 corresponds in the width direction to the position and length of the middle portion 15a of the tool holder 15.
  • the position and length of each free area B2 corresponds to the position and length of an overlying edge portion 15b of the tool holder 15.
  • the tool holder 15 is rigidly mechanically connected on the underside to the upper edge 13a of the central element 13, for example by welding.
  • the upper edge of the two side elements 14, 14' runs parallel to and at the same level as the upper edge 13a of the central element 13 only in the middle section 15a of the tool holder 15.
  • This upper edge section of the side elements is in 3 and 4 denoted by reference numeral 14a. If necessary, this upper edge section can also be welded to the underside of the tool holder 15 .
  • the upper edge of the two side elements 14, 14' can alternatively lie in the middle section 15a of the tool holder 15 below the upper edge 13a of the central element 13 (not shown in the figures).
  • the upper edge sections 14a of the respective side elements 14, 14' are adjoined on each side of the area B1 by sloping, downward running upper edge sections 14b, which in turn merge into straight horizontal upper edge sections 14c, which are spaced apart from the overlying section of the upper edge 13a of the Central element 13 are arranged.
  • the upper edge sections 14b and 14c lie in the free areas B2 of the lower beam 12. Because the upper edge sections 14c of the side elements 14, 14' are arranged lower than the upper edge section of the central element 13 above them, at the beginning of the bending process in the free areas B2 only causes a force to be introduced into the central element 13 .
  • Lower-lying horizontal upper edge sections of the central element 13 and the side elements 14, 14' adjoin the upper edge sections 14c on the left and right.
  • an opened portion 13b is provided, which forms an upper end of a recessed region 16 in the central element 13 designed as a corresponding recess.
  • the recessed portion 16 first extends downward from the opened portion 13b and then bends through 90° to then extend under the tool holder 15 in the horizontal direction.
  • the two recessed areas 16 reduce the flexural rigidity of the central element 13 in the area of the two ends 15c of the tool holder 15 .
  • a reduction in the flexural rigidity can also be achieved by a corresponding section with a smaller thickness of the central element.
  • the recessed areas 16 can also be formed in that the central element 13 is shortened in the width direction y compared to the side elements 14, 14', so that the opposite ends of the central element in the width direction in a respective area B2 in front of the corresponding end 15c of the tool holder 15 lie.
  • the two recessed areas 16 are each a presently designed as a bolt limiting means 17, which further below with reference to figure 5 is explained.
  • the two free areas B2 of the lower beam 12 are characterized in that, on the one hand, their area moment of inertia is reduced by the recessed areas 16 and on the other hand, in these areas, the central element 13 and the side elements 14 have no material, non-positive or positive connection with one another, which prevents a deformation of the central element 13 relative to the side elements 14, 14'.
  • the central element 13 and the side elements 14, 14' are welded to one another at their upper edges 13a and 14a in the present example.
  • the corresponding welds are in 4 indicated by thick lines and denoted by the reference numeral 18. This welded connection increases the area moment of inertia in the middle area B1 in comparison to the free areas B2.
  • the increased area moment of inertia in the middle area B1 counteracts a deformation of the lower beam in this area when force is introduced during a bending process. Such a deformation is undesirable since it has a negative effect on the bending result of the corresponding workpiece.
  • the corresponding bending force is introduced only into the central element 13, which can bend due to the reduction in bending stiffness caused by the recessed areas 16.
  • a deformation of the leg of the central element 13 is achieved, which is located above the recessed area 16 and in which the limiting means 17 is also positioned.
  • the deformation of the free areas B2 counteracts the effect that, during a bending process, the lower beam would deform less in the edge area than in the middle without sections with reduced flexural rigidity.
  • the combination of the reinforcement of the lower beam in the central area B1 and the reduction in the flexural rigidity in the free areas B2 can ensure a more uniform bending of the workpiece overall.
  • the force is introduced symmetrically along the tool holder 15 and this ensures a significantly improved, relative deformation of the tool holder 15, which leads to a better bending result.
  • figure 5 shows a sectional view along the line LL 4 , from which the structure of the limiting means 17 can be seen.
  • the limiting means is in the form of a bolt and comprises a cylindrical portion 17a which is inserted in a corresponding opening of the side element 14.
  • An adjustment means 17b designed as an eccentric adjoins this cylindrical section.
  • the eccentric has a flattening on its upper side and is otherwise configured cylindrically.
  • the adjusting means 17b is accommodated in a corresponding opening 19 of the central element 13.
  • the adjusting means 17b is followed by a further cylindrical section 17c, which is accommodated in an opening in the side element 14'.
  • the extent of the adjusting means 17b in the vertical direction is chosen such that there is a clearance, preferably from 0.05 mm to 5.0 mm and particularly preferably from 0.1 mm to 1 mm, between the upper flattening and the opposite upper side of the opening 19 is present in the central element 13. Because of this play, it is possible, during a bending process, to elastically deform the leg of the central element 13 which is located above the recessed area 16 .
  • the maximum deformation and, in this sense, the limitation of the amount of deformation is defined by the size of the game.
  • the setting means 17b of the limiting means 17 has a plurality of flattened areas at different distances from the longitudinal axis of the bolt.
  • the bolt can be rotated manually by an operator using a suitable tool on its side located on the side element 14, ie different flattened areas can be aligned in the upward direction. Due to the eccentric configuration of the adjusting means 17b, the play of the limiting means 17 can be changed and in this sense the amount of deformability of the central element 13 can be adjusted.
  • actuators can also be provided, with which the bolt or the limiting means 17 can be suitably rotated is twisted.
  • This actuator is in figure 5 only indicated schematically by a dashed rectangle and denoted by reference numeral 20 .
  • the actuators can be hydraulic or motor-driven, for example, and cause the bolt to rotate.
  • the setting of the play and thus the deformability of the central element 13 is simplified by means of the actuator, since the operator no longer has to turn the bolt by hand.
  • the embodiments of the invention described above have a number of advantages.
  • a reinforced middle area of a lower beam with less rigid free areas at its edge, a uniform rectilinear deformation of the upper edge of the lower beam can be achieved during a bending process, which leads to significantly better bending results.
  • a plate-shaped structure of the lower beam made up of a middle central element and adjacent side elements is used. During a bending process, this structure ensures that force is introduced in the middle area of the lower beam both via the central element and via the side elements, whereas in the free areas only the central element is used for force introduction.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
EP21168657.1A 2021-04-15 2021-04-15 Machine à plier permettant de plier des pièces, en particulier presse plieuse Withdrawn EP4074432A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP21168657.1A EP4074432A1 (fr) 2021-04-15 2021-04-15 Machine à plier permettant de plier des pièces, en particulier presse plieuse
EP22722814.5A EP4323129A1 (fr) 2021-04-15 2022-04-14 Machine à cintrer pour plier des pièces, en particulier plieuse
JP2023549030A JP2024506699A (ja) 2021-04-15 2022-04-14 ワークピースを曲げるための曲げ機、とりわけプレスブレーキ
PCT/EP2022/060011 WO2022219120A1 (fr) 2021-04-15 2022-04-14 Machine à cintrer pour plier des pièces, en particulier plieuse
US18/287,000 US20240082901A1 (en) 2021-04-15 2022-04-14 Bending machine for bending workpieces, in particular a press brake
CN202280017359.2A CN116887931A (zh) 2021-04-15 2022-04-14 用于弯折工件的弯折机器、特别是压弯机

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21168657.1A EP4074432A1 (fr) 2021-04-15 2021-04-15 Machine à plier permettant de plier des pièces, en particulier presse plieuse

Publications (1)

Publication Number Publication Date
EP4074432A1 true EP4074432A1 (fr) 2022-10-19

Family

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Family Applications (2)

Application Number Title Priority Date Filing Date
EP21168657.1A Withdrawn EP4074432A1 (fr) 2021-04-15 2021-04-15 Machine à plier permettant de plier des pièces, en particulier presse plieuse
EP22722814.5A Pending EP4323129A1 (fr) 2021-04-15 2022-04-14 Machine à cintrer pour plier des pièces, en particulier plieuse

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP22722814.5A Pending EP4323129A1 (fr) 2021-04-15 2022-04-14 Machine à cintrer pour plier des pièces, en particulier plieuse

Country Status (5)

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US (1) US20240082901A1 (fr)
EP (2) EP4074432A1 (fr)
JP (1) JP2024506699A (fr)
CN (1) CN116887931A (fr)
WO (1) WO2022219120A1 (fr)

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DE102010015920A1 (de) 2009-03-13 2010-11-04 Amada Europe Abkantpresse zum Biegen von Folien
DE102010015919A1 (de) 2009-03-13 2010-11-04 Amada Europe Abkantpresse zum Biegen von Folien
WO2013120123A1 (fr) * 2012-02-13 2013-08-22 Trumpf Maschinen Austria Gmbh & Co. Kg. Presse à cintrer doté d'élément barre réglable

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US20240082901A1 (en) 2024-03-14

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