EP3970876A1 - Cintreuse de panneaux pour le pliage de tôles - Google Patents

Cintreuse de panneaux pour le pliage de tôles Download PDF

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Publication number
EP3970876A1
EP3970876A1 EP20196432.7A EP20196432A EP3970876A1 EP 3970876 A1 EP3970876 A1 EP 3970876A1 EP 20196432 A EP20196432 A EP 20196432A EP 3970876 A1 EP3970876 A1 EP 3970876A1
Authority
EP
European Patent Office
Prior art keywords
drive
bending
bending beam
panel bender
drive guide
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Withdrawn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
EP20196432.7A
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 EP20196432.7A priority Critical patent/EP3970876A1/fr
Priority to EP21773377.3A priority patent/EP4164819B1/fr
Priority to PCT/EP2021/074616 priority patent/WO2022058204A1/fr
Publication of EP3970876A1 publication Critical patent/EP3970876A1/fr
Withdrawn legal-status Critical Current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
    • B21D5/04—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
    • 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

Definitions

  • the invention relates to a panel bender for bending sheet metal.
  • the invention relates to a panel bender for bending sheet metal according to claim 1.
  • the movement of the bending beam is implemented using a wide variety of complicated mechanisms.
  • the bending beam must be able to move vertically and horizontally and generate the required force.
  • the vertical, long-stroke movement is usually carried out using cylinders or screw drives.
  • the horizontal direction requires a relatively short stroke with great force for the application and is implemented using various gears such as wedge systems, eccentrics or superimposed slewing rings. Such implementations are difficult to scale.
  • AT 372883B discloses a device for bending a sheet metal panel, the drive of the bending tool, which acts approximately parallel to the clamping plane, being supported on the carrier of the holding stamp serving as a counter-tool.
  • the object of the invention is now to avoid the disadvantages of the prior art and to provide an improved panel bender.
  • the panel bender according to the invention for bending metal sheets by means of at least one bending tool arranged on a bending beam a machine body, at least one guide seat which runs in a first direction on the machine body, the direction being perpendicular to the direction, at least one drive guide unit, which is movably arranged in the at least one guide receptacle, and wherein the bending beam is movably arranged in the drive guide unit in a second direction perpendicular to the first direction and perpendicular to the direction.
  • the panel bender according to the invention or the swivel bending machine has the advantage that vertical and horizontal movements are mechanically separated and superimposition is excluded. Both the vertical and the horizontal guidance of the bending beam are close to the flow of forces due to the structure described and enable the machine to be designed with appropriate rigidity. The entire construction optimizes the resulting stresses caused by reaction forces. Furthermore, a significantly simplified and also more precise manufacture of the machine body is possible - only the front side is machined after clamping.
  • the invention simplifies the overall structure of a panel bender, since additional drives and guides are saved and options for adjustment and dynamic control are nevertheless available. Installation and service times are significantly reduced in comparison, and easy interchangeability is guaranteed by the design.
  • a scaling of the machines is significantly simplified according to the invention. If more bending force is required, such as when the machine is longer or when bending thicker sheet metal, the number of drives can be increased, for example in the form of short-stroke cylinders.
  • a two-fold increase in accuracy can be achieved.
  • increased accuracy is already achieved during the production of the machine body, since no re-clamping or retooling is required, since only one front side of the machine body has to be machined.
  • increased accuracy is achieved during operation of the panel bender.
  • first direction runs vertically and that the second direction runs horizontally. This arrangement allows an advantageous introduction and absorption of forces and moments.
  • the drive guide unit can have an essentially C-shaped base body, with an inner contour of the drive guide unit at least partially corresponding to an outer contour of the bending beam. In this way, the bending beam can be fitted exactly into the drive guide unit, also with a positive or non-positive fit.
  • an infeed element to be provided as a support bearing for the bending beam in the drive guide unit, the infeed element being able to be fastened to one end of a lower leg of the C-shaped base body.
  • the drive guide unit In the upper (also possible below) area, the drive guide unit can be fixed floating. In the lower area of the drive guide unit or the guide unit, another support bearing such as a feed element can be attached, which optimally dissipates moments when bending sheet metal.
  • This guide can advantageously be adjusted by means of a wedge adjustment and can be reached from the front.
  • the bending beam can be suspended over two or more optimally rigid drive guide units. Directly below and exactly in the power flow of this recording, the guide can be in the horizontal direction.
  • the vertical bending beam guide of the now technically separate movements can be attached directly to the machine body with sliding or rolling element guides (or similar).
  • the drive guide unit with the embedded bending beam is guided directly.
  • Another advantage is the simultaneous entrainment of the bending beam and the bending force applied horizontally in the vertical direction. The control engineering effort is significantly reduced if the same parameters for the horizontal movement - can be used regardless of the vertical position.
  • Suitable guides on the second drives of the vertical adjustment enable an angle adjustment of the bending beam.
  • small Short-stroke cylinders also electromechanical or similar
  • These units are connected horizontally to the bending beam and allow force to be applied almost over the entire area, as well as a particularly advantageous use of the unit's rigidity. Deformations that occur can be minimized by the available space inside the machine body with the appropriate use of materials. The entire construction optimizes the resulting stresses caused by reaction forces.
  • the short-stroke cylinders do not affect the vertical movement/guidance in any way and allow the circular movement of the bending beam to be implemented on the control side as a result of the technology.
  • the second drive can thus be located directly above or below the first drive, for example in the extension of a movement axis of the first drive.
  • the bending beam can be positioned horizontally or tilted.
  • a first drive is assigned to each of the several drive guide units. This enables more precise control and more even application of force.
  • an extent of the bending beam in the direction of the second direction is smaller than an extent of the bending beam in the direction of the first direction.
  • the bending line is arranged close to the introduction of force, so that moments can be better absorbed.
  • the distortion when heated is reduced.
  • a controller is provided for controlling the at least one first drive and the at least one second drive and that the controller is set up to align the bending tool arranged on the bending beam in the first and second direction along a bending line. This can be a parallel alignment. A rotary movement of the bending beam can be achieved through individual control of the drives, which allows bending that was previously impossible.
  • a machine body structure of this type enables, among other things, a horizontal parallelism adjustment of the entire bending beam to the bending line.
  • the drives for example in the form of a short-stroke cylinder per unit, are operated in parallel and independently of one another on the outside of the machine. Deviations in the parallelism can thus be compensated for and avoided in a position-controlled manner, for example with measuring systems and corresponding controls. For example, one side can be positioned a little further forward than the other side.
  • the vertical parallelism adjustment here the suspension of the bending beam on two or more externally attached and separately controllable drives such as cylinders enables a parallelism adjustment in the event of deviations.
  • figure 1 shows a perspective view of a panel bender 10 with a machine body 12 which can be fastened to a floor by means of feet 14 .
  • the machine body 12 extends in a first direction z, which is vertical, a second direction y, which is horizontal, and a third direction z, which is horizontal and perpendicular to the other two directions z and y.
  • a bending line, along which sheet metal parts are bent by the panel bender 10, runs in the x direction.
  • Bending is done by means of a bending beam 16, which is movably mounted on the machine body 12 in the z and y direction.
  • the bending beam 16 is mounted here on at least two drive guide units 18 which can be moved in the z direction on the machine body 12 and are each driven by a first drive 20 .
  • the drive guide units 18, of which more than two may be provided, are arranged along the x direction.
  • the bending beam 16 is movably mounted in the drive guide units 18 in the y direction.
  • the two movement axes in the z and y direction are technically separate movements and are therefore decoupled from one another, which simplifies both the design and the control and also increases accuracy.
  • a hold-down device for a workpiece is movably held on a front side of the machine body and can be moved on the machine body in the z direction by two drives.
  • the hold-down device is not shown here.
  • figure 2 shows a perspective view of the machine body 12 with a front side 22 which lies in the xz plane.
  • three guide receptacles 24 are provided here, which extend in the z direction.
  • the guide receptacles 24 are recesses in the machine body 12 and here have guide means 26 which are attached to the front side 22 of the machine body 12 .
  • the guide means 26 can be designed as slide rails, for example.
  • a drive guide unit 18 is arranged in each of the guide receptacles 24 and is driven by a first drive 20 .
  • the drive guide unit 18 has a substantially C-shaped base body 28 with an upper leg 30 and a base part 32. Only the two outermost drive guide units 18 are driven while the one or more inner, i.e. located between the two outermost drive guide units 18, drive guide units are not driven. Alternatively, it is possible that the inner drive guide units are also driven.
  • a piston or cylinder of the first drive 20 acts on an upper leg 30 of the drive guide unit 18 .
  • the guide means 26 can secure the drive guide unit 18 in the recess of the guide receptacles 24 against removal.
  • Further guide means 34 are provided on the upper leg 30 and interact with the guide means 26 .
  • three second drives 36 are arranged here in the form of short-stroke cylinders.
  • the three second drives 36 are arranged along the z direction and can be arranged in an axis or an extension of the axis of the first drive 20 .
  • the second drives 36 exert an actuating force in the y direction.
  • the second drives 36 act on the bending beam to move it and allow force to be introduced almost over a large area.
  • a scaling of the machines is significantly simplified according to the invention. If more bending force is required, for example with greater machine lengths or when bending thicker sheet metal, the number of second drives 36 or short-stroke cylinders can be increased.
  • Each of the three short-stroke cylinders shown here can be referred to as a second drive 36 .
  • the three short-stroke cylinders shown here can be referred to collectively as the second drive 36 .
  • the first drive or drives 20 move the drive guide units 18 in the vertical direction z.
  • the second drives 36 are thus also moved in the drive guide units 18 .
  • the second drives 36 can be moved independently and decoupled from the first drives 20 .
  • figure 3 shows a perspective partial sectional view of the panel bender 10 with the bending beam 16.
  • the bending beam 16 is accommodated and held in the drive guide units 18.
  • the essentially C-shaped base body 28 of the drive guide unit 18 has an inner contour which at least partially corresponds to an outer contour of the bending beam 16 .
  • the bending beam 16 is in contact with the upper leg 30 of the base body 28 or the drive guide unit 18 .
  • an underside of the bending beam 16 runs parallel to a lower leg 38 of the drive guide unit 18.
  • the upper leg 30 and the lower leg 38 extend from the base part 32. Between the two legs 30, 38 a receiving space for the bending beam 16 is formed.
  • An infeed element 40 is provided as a support for the bending beam 16 in the drive guide unit 18 , the infeed element 40 being attached to one end of the lower leg 38 of the C-shaped base body 28 .
  • the infeed element 40 optimally derives moments when bending sheet metal, in particular when bending in the negative direction.
  • the feed element 40 can easily be reached from the front and fastened, for example, by means of a screw connection.
  • An extent of the bending beam 16 in the direction of the second direction is smaller here than an extent of the bending beam 16 in the direction of the first direction. In this way, moments around the second direction can be reduced.
  • a plurality of drive guide units 18 may be arranged along the third direction, with the bending beam 16 being arranged in the plurality of drive guide units 18 .
  • Station operation can be made possible between two drive guide units 18 in each case, so that, for example, several work steps can be carried out along the bending line or in the third direction.
  • a controller 42 of the panel bender 10 is used to control the at least one first drive 20 and the at least one second drive 36 and is only shown schematically here.
  • the controller 42 is connected to the drives 20, 36 and, if necessary, sensors and other controllers.
  • the controller 42 is set up to align a bending tool 44 arranged on the bending beam 16 in the first and second direction along a bending line.
  • sensors for measuring a deformation of the bending beam during a bending process can provide measured values.
  • manipulated variables for the first and/or the second drive can be derived to compensate for the deformation.
  • the controller 42 can then control the drive or drives in accordance with the manipulated variables. Due to the decoupling of the drives, the manipulated variables for the first drive 20 and the second drive 36 are also independent of one another.
  • the simple and modular construction allows simple manufacture and a simple construction of the panel bender 10.
  • the machine body 12 only has to be clamped once, since it only has to be processed from the front.
  • the assembly of the drive guide units 18, the bending beam 16 and the first drive 20 is only necessary from the front.
  • the components can be easily scaled, so that a modular system is possible. This is made possible by decoupling the two movement axes, i.e. the at least one first drive 20 and the at least one second drive 36.
  • the panel bender presented here makes it possible for the two movement axes in the z and y direction to be technically separate movements and thus decoupled from one another, which simplifies both the construction and the control and also increases the accuracy.
  • a further exemplary embodiment of a panel bender with optimized crowning is described below. Both exemplary embodiments or versions of the invention can be combined with one another.
  • the movement of the bending beam is implemented using a wide variety of complicated mechanisms.
  • the bending beam must be able to move vertically and horizontally and generate the required force. Bending reaction forces that occur, especially in the horizontal direction, cannot be prevented, or only with great difficulty, by the design of the drive or compensated by the control technology. As a result, material deformations on the bending beam have a negative effect on the bending result.
  • the object of the invention is now to avoid the disadvantages of the prior art and to provide an improved panel bender or an improved method for bending a bending beam.
  • the panel bender according to the invention with dynamic crowning for bending sheet metal by means of at least one bending tool arranged on a bending beam, the bending beam extending along one direction, comprises a machine body, at least two guide receptacles which run in a vertical direction on the machine body, at least two drive guide units, which are movably arranged in the at least two guide receptacles by at least one first drive, a bending beam, which is arranged movably in a horizontal direction in the at least two drive guide units, a second drive for the bending beam being arranged in each drive guide unit, wherein the second drive has at least two drive elements arranged in a vertical direction, at least one sensor for measuring a deformation of the bending beam during a bending process, a controller for determining manipulated variables based on measured values of the at least one sensor for the first and/or the second drive to compensate for the deformation.
  • At least the second drives can form a crowning unit to compensate for a deformation of the bending beam.
  • the crowning unit is connected to the bending beam in the vertical direction and thus moves with it. Positive and negative bends are cambered in the same way, allowing simplified control.
  • the design allows the two axes of movement to be decoupled, ie the at least one first drive and the second drive.
  • the second drives are used to compensate for the deformation, i.e. crowning.
  • the second drives take over the infeed of the bending beam in the horizontal direction.
  • the crowning portion can be superimposed on the infeed portion of the second drive.
  • the crowning component is completely independent of the at least one first drive.
  • At least one second drive is connected to the bending beam.
  • Force generation and position control of the horizontal direction of movement of the bending beam can be realized via externally connected crowning units and guided accordingly.
  • a centrally connected crowning unit can act in addition to the described positioning and can generate additional bending force under pressure, but also position-controlled.
  • This unit further improves the entire machine frame construction, since a planar application of force is made possible and comparatively wide metal sheets can be processed with the appropriate force.
  • This unit can be driven hydraulically, electromechanically or similarly.
  • At least four drive guide units are arranged along a bending line of the panel bender, which runs perpendicular to the vertical direction and the horizontal direction.
  • the use of several drive guide units or crowning units, distributed across the width of the machine, enables station operation on the panel bender. The resulting bending forces are then introduced at the respective station.
  • the drive elements are short-stroke cylinders and are subjected to the same pressure. This variant allows simple control or regulation.
  • the drive elements are short-stroke cylinders and are subjected to different pressures.
  • This variant allows the bending beam to be tilted and the back of the bending beam and thus the bending beam itself to be cambered extensively.
  • Inner drive guide units arranged between the two outer drive guide units can be used for crowning, as can the two outer drive guide units.
  • figure 4 shows a schematic view of a panel bender 10 with crowning.
  • Panelbenders 10 shown corresponds to those in FIGS Figures 1 and 2 shown panel bender 10.
  • FIGS Figures 1 and 2 shown panel bender 10.
  • a machine body 12 of the panel bender 10 extends in a first direction z, which runs vertically, a second direction y, which runs horizontally, and a third direction z, which runs horizontally and perpendicularly to the other two directions z and y.
  • a bending line, along which sheet metal parts are bent by the panel bender 10, runs in the x direction.
  • Bending is done by means of a bending beam 16, which is movably mounted on the machine body 12 in the z and y direction.
  • the bending beam 16 is mounted here on at least two drive guide units 18 which can be moved in the z direction on the machine body 12 and are each driven by a first drive 20 .
  • the drive guide units 18, of which more than two may be provided, are arranged along the x direction.
  • the bending beam 16 is movably mounted in the drive guide units 18 in the y direction.
  • the two movement axes in the z and y direction are technically separate movements and are therefore decoupled from one another, which simplifies both the design and the control and also increases accuracy.
  • a second drive 36 with three drive elements 46 is arranged in the drive guide unit 18 in each case.
  • the three drive elements 46 are arranged along the z direction and can be arranged in an axis or an extension of the axis of the first drive 20 .
  • the second drive 36 exerts an actuating force in the y direction.
  • the drive elements 46 act on the bending beam to move it and allow force to be introduced almost over a large area.
  • a scaling of the machines is significantly simplified according to the invention. If more bending force is required, for example with greater machine lengths or when bending thicker sheet metal, the number of second drives 36 or short-stroke cylinders can be increased.
  • Each of the three short-stroke cylinders shown here can be referred to as a second drive 36 .
  • the three short-stroke cylinders shown here can be referred to collectively as the second drive 36 .
  • the first drive or drives 20 move the drive guide units 18 in the vertical direction z.
  • the second drives 36 are thus also moved in the drive guide units 18 .
  • the second drives 36 can be moved independently and decoupled from the first drives 20 .
  • the bending beam 16 is accommodated and held in the drive guide units 18 .
  • An extension of the bending beam 16 in the y direction is smaller here than an extension of the bending beam 16 in the z direction. In this way, moments around the x direction can be reduced.
  • a plurality of drive guide units 18 are arranged along the x direction, with the bending beam 16 being arranged in the plurality of drive guide units 18 .
  • Station operation can be made possible between two drive guide units 18 in each case, so that, for example, several work steps can be carried out along the bending line or in the x direction.
  • At least one second drive 36 can form a crowning unit 48 to compensate for a deformation of the bending beam 16.
  • the crowning unit 48 is connected to the bending beam 16 in the vertical y direction and thus moves with it. Positive and negative bends are cambered in the same way, allowing simplified control.
  • a controller 42 of the panel bender 10 is used to control the at least one first drive 20 and the at least one second drive 36 and is only shown schematically here.
  • the controller 42 is connected to the drives 20, 36, at least one sensor 46 and optionally other controllers.
  • the controller 42 is set up to align a bending tool 44 arranged on the bending beam 16 in the first and second direction along a bending line.
  • sensors 46 for measuring a deformation of the bending beam 16 can provide measured values during a bending process.
  • manipulated variables for the first and/or the second drive 20, 36 can be derived to compensate for the deformation.
  • the controller 42 can then control the drive or drives 20, 36 according to the manipulated variables. The cambering takes place here by compensating for the deformation of the bending beam 16 during a bending process.
  • the propulsion or the control for the crowning can be superimposed on a propulsion or a control for the movement of the bending beam 16 .
  • the drive elements 46 of a second drive 36 can be controlled in parallel or differently. If the drive elements 46 are short-stroke cylinders, for example, they can be subjected to the same or different pressures.
  • the method for crowning a bending beam of a panel bender can run in the controller 42 .
  • a deformation of the bending beam 16 is measured during a bending process using at least one sensor 50. Deformations in all directions, preferably the y direction, can be detected.
  • a manipulated variable for the first and the second drive 20, 36 is then determined.
  • separate manipulated variables can be determined for the second drive 36 for each drive element 46 of the second drive 36.
  • a single manipulated variable for a second drive 36 can be determined. It is possible, for example, that a single manipulated variable for a second drive 36 is determined for moving the bending beam 16 and that separate manipulated variables are determined for each drive element 46 of the second drive 36 for crowning.
  • first and the second drive are controlled separately.
  • This separate control can take place at the same time, the separation of the control relates to the functionality. For example, crowning only requires activation of the drive elements 46 or the second drives 36.
  • the crowning or crowning unit presented here is connected to the bending beam in the vertical direction and moves with the bending beam. Positive and negative bends are cambered in the same way, allowing simplified control.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
EP20196432.7A 2020-09-16 2020-09-16 Cintreuse de panneaux pour le pliage de tôles Withdrawn EP3970876A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP20196432.7A EP3970876A1 (fr) 2020-09-16 2020-09-16 Cintreuse de panneaux pour le pliage de tôles
EP21773377.3A EP4164819B1 (fr) 2020-09-16 2021-09-07 Cintreuse de panneaux pour le pliage de tôles
PCT/EP2021/074616 WO2022058204A1 (fr) 2020-09-16 2021-09-07 Cintreuse de panneau pour cintrer de la tôle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20196432.7A EP3970876A1 (fr) 2020-09-16 2020-09-16 Cintreuse de panneaux pour le pliage de tôles

Publications (1)

Publication Number Publication Date
EP3970876A1 true EP3970876A1 (fr) 2022-03-23

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Family Applications (2)

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EP20196432.7A Withdrawn EP3970876A1 (fr) 2020-09-16 2020-09-16 Cintreuse de panneaux pour le pliage de tôles
EP21773377.3A Active EP4164819B1 (fr) 2020-09-16 2021-09-07 Cintreuse de panneaux pour le pliage de tôles

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP21773377.3A Active EP4164819B1 (fr) 2020-09-16 2021-09-07 Cintreuse de panneaux pour le pliage de tôles

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EP (2) EP3970876A1 (fr)
WO (1) WO2022058204A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT372883B (de) 1981-10-09 1983-11-25 Voest Alpine Ag Vorrichtung zum abkanten einer blechtafel
EP1009557A1 (fr) * 1997-04-15 2000-06-21 Antonio Codatto Presse a cintrer pour tole metallique
EP2691190A1 (fr) * 2011-03-30 2014-02-05 Finn-Power Italia S.r.l. Mécanisme pour déplacer le porte-lame d'une presse plieuse pour plier des plaques de tôle
WO2017141124A1 (fr) * 2016-02-18 2017-08-24 Olma S.R.L. Groupe de cintrage d'une machine-outil de panneautage

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT372883B (de) 1981-10-09 1983-11-25 Voest Alpine Ag Vorrichtung zum abkanten einer blechtafel
EP1009557A1 (fr) * 1997-04-15 2000-06-21 Antonio Codatto Presse a cintrer pour tole metallique
EP2691190A1 (fr) * 2011-03-30 2014-02-05 Finn-Power Italia S.r.l. Mécanisme pour déplacer le porte-lame d'une presse plieuse pour plier des plaques de tôle
WO2017141124A1 (fr) * 2016-02-18 2017-08-24 Olma S.R.L. Groupe de cintrage d'une machine-outil de panneautage

Also Published As

Publication number Publication date
EP4164819A1 (fr) 2023-04-19
WO2022058204A1 (fr) 2022-03-24
EP4164819B1 (fr) 2023-10-18

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