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
  • B21D13/00—Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form
  • B21D13/02—Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form by pressing
• • 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
  • B21D17/00—Forming single grooves in sheet metal or tubular or hollow articles
  • B21D17/02—Forming single grooves in sheet metal or tubular or hollow articles by pressing
• • 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
  • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
  • B21D43/003—Positioning devices
• • 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
  • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
  • B21D43/006—Feeding elongated articles, such as tubes, bars, or profiles
• • 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
  • B21D51/00—Making hollow objects
  • B21D51/02—Making hollow objects characterised by the structure of the objects
  • B21D51/12—Making hollow objects characterised by the structure of the objects objects with corrugated walls

Definitions

• the invention relates to a bending installation for forming corrugations in a metal sheet.
• the corrugated metal sheet obtained by means of such a folding installation being intended for the construction of a waterproof membrane for a tank
• the invention also relates to the field of sealed and thermally insulating tanks, with membranes, for storage. and / or the transport of a fluid, such as a liquefied gas.
• Document KR20150100009 discloses an installation for shaping corrugated sheets intended to form a waterproof membrane for a liquefied natural gas tank.
• the forming installation comprises a device equipped with profiling rollers and making it possible to continuously form longitudinal corrugations, that is to say extending parallel to the direction of advance of the sheet. Subsequently, the sheets are cut and then pass through a press which is arranged to stamp the sheets and form, with each press stroke, a transverse corrugation, that is to say a corrugation extending perpendicular to the longitudinal corrugations.
• This system makes it possible to produce corrugated sheets having great lengths.
• the transverse corrugations are not produced continuously, which impairs the efficiency of the corrugated sheet forming process.
• the transverse corrugations are made by a stamping process and not by a bending process.
• stamping operations unlike bending operations, have the effect of modifying the thickness of the metal sheet at the level of the corrugation, and consequently, of degrading the mechanical properties of the corrugated sheets.
• An idea underlying the invention is to provide a bending installation for forming transverse corrugations in a metal sheet which is simple and efficient. Another idea underlying the invention is to provide a bending facility for making corrugations more productively. Another idea underlying the invention is to provide a bending installation which makes it possible to obtain corrugations without appreciable modification of the thickness of the sheet.
• the invention provides a folding installation intended for the formation of transverse corrugations in a metal sheet; the folding installation comprising: a drive device ensuring an advance of the metal sheet, horizontally, from the rear to the front in a direction of advance; and - a folding device comprising: a frame mounted to move parallel to the direction of advance between a rear position and a front position, said frame being associated with a first actuator capable of moving said frame between the rear position and the front position; and - a punch extending in a transverse direction which is orthogonal to the direction of advance, the punch being movable vertically on the frame between a rest position and a folding position in which said punch deforms the metal sheet in order to form the one of the transverse corrugations, the punch being associated with a second actuator capable of moving said punch between the rest position and the folding position; and - a control unit which is configured to control the first actuator and the second actuator and is configured to simultaneously move the frame of the folding device from the rear position to the front position and the punch from
• such a folding installation comprises one or more of the following characteristics.
• the metal sheet is intended for forming a membrane for a tank for storing a liquefied gas.
• control unit is configured to control the drive device so as to ensure the advance of the metal sheet from the rear to the front at a speed V1 and the control unit is configured such that: - the second actuator moves the punch towards the bending position at a speed such that ; with : the reduction in the dimension of the metal sheet in the direction of advance f due to the bending operation; and t : the weather.
• control unit is configured to control the drive device so as to ensure the advance of the metal sheet from the rear to the front at a speed V1 and the control unit is configured so that: - the second actuator moves the punch in the direction of the bending position at a speed V7 between 0.95 and 1.05 and preferably equal to ; with the angle formed between one of the sides of the substantially triangular section of the punch and a horizontal axis.
• control unit is configured such that: - the first actuator moves the frame of the folding device from the rear position to the front position at a speed V2 which is equal to V1 during the movement of the punch from the rest position to an intermediate position in which said punch comes into contact with sheet metal and which is less than during movement of the punch from the intermediate position to the folding position.
• control unit is configured such that the first actuator moves the frame of the folding device from the rear position to the front position at a speed V2 which is between 0.95 x and 1.05 x , during movement of the punch from the intermediate position to the folding position.
• the speed V2 is preferably equal to , the aforementioned speed range making it possible to take account of parasitic phenomena, such as sliding phenomena in particular.
• control unit is configured such that the first actuator continues to move the frame to the front position when the second actuator moves the punch from the folding position to the rest position.
• the folding device comprises: - a lower frame which is mounted movably vertically on the frame of the folding device, and is arranged opposite the punch, said lower frame being associated with a third actuator which is able to move the lower frame between a rest position and a position folding; and - two lateral dies which each have an upper bearing surface intended to receive the metal sheet and a half cavity; the two lateral dies being mounted to slide horizontally on the lower frame in a direction parallel to the direction of advance between a separated position and a close position in which the half-impressions together form an impression having a shape complementary to that of the punch.
• the side dies each comprise one or more grooves extending parallel to the direction of advance and each intended to receive a previously formed longitudinal corrugation.
• control unit is configured such that the third actuator moves the lower frame from the rest position to the folding position during the movement of the punch from the rest position to an intermediate position in which said punch comes into contact with the sheet.
• the folding device comprises return members which are configured to return the lateral dies to the separated position.
• the punch is fixed to a pusher which is able to be moved by the first actuator in order to move the punch between the rest position and the folding position
• the folding device comprising two side clamps which are arranged on either side of the punch, each hold down clamp comprising a clamping surface facing one of the side dies, each hold down clamp being mounted so that it can move vertically on a respective hold down holder, the clamp holders flanks being mounted horizontally movably on the pusher parallel to the direction of advance between a separated position and a close position.
• the folding installation further comprises, upstream of the folding device, a profiling device configured to form at least one corrugation extending parallel to the direction of advance.
• a profiling device configured to form at least one corrugation extending parallel to the direction of advance.
• the folding installation further comprises, downstream of the folding device, a conforming device which is configured to modify a corrugation previously folded by means of the folding device.
• the conforming device comprises: a frame which is mounted to move parallel to the direction of advance between a rear position and a front position, said frame being associated with a fourth actuator capable of moving said frame between the rear position and the front position; and - a punch which is mounted to move vertically on the frame of the conforming device between a rest position and a conforming position in which said punch deforms the metal sheet in order to modify the shape of a transverse corrugation, previously formed by the shaping device folding, the punch being associated with a fifth actuator capable of moving said punch between the rest position and the conforming position.
• control unit is configured to control the fourth actuator and the fifth actuator.
• control unit is configured to control the drive device so as to ensure the advance of the metal sheet from the rear to the front at a speed V1 and the control unit is configured such that the fourth actuator moves the frame of the shaping device from the rear position to the front position at a speed V3 which is equal to V1 during movement of the punch of the folding device from the rest position to an intermediate position wherein the punch of the folding device comes into contact with the metal sheet and which is zero during movement of the punch of the folding device from the intermediate position to the folding position.
• the invention also provides a method of using an aforementioned folding installation, the method comprising: - Positioning a metal sheet so that the drive device ensures an advance of the metal sheet; and - Controlling the first actuator and the second actuator by means of the control unit so as to simultaneously move the frame of the folding device from the rear position to the front position and the punch from the rest position to the folding position.
• such a method of using a folding installation has one or more of the following features.
• the second actuator is controlled such that: - the second actuator moves the punch in the direction of the bending position at a speed such that ; with : the reduction in the dimension of the metal sheet in the direction of advance f due to the bending operation; and t : the weather.
• the second actuator is controlled so that the second actuator moves the punch in the direction of the bending position at a speed V7 of between 0.95 and 1.05 and preferably equal to ; with the angle formed between one of the sides of the substantially triangular section of the punch and a horizontal axis.
• the first actuator is controlled so as to move the frame of the folding device from the rear position to the front position at a speed V2 which is between 0.95 x and 1.05 x , and advantageously equal to during movement of the punch from an intermediate position in which the punch of the folding device contacts the metal sheet towards the folding position.
• the first actuator and the second actuator are controlled so as to continue the movement of the frame towards the front position during the movement of the punch from the folding position to the rest position.
• the folding installation further comprises, downstream of the folding device, a conforming device which is configured to modify a corrugation previously folded by means of the folding device, the conforming device comprising: a frame which is mounted to move parallel to the direction of advance between a rear position and a front position, said frame being associated with a fourth actuator capable of moving said frame between the rear position and the front position; and - a punch which is mounted to move vertically on the frame of the conforming device between a rest position and a conforming position in which said punch deforms the metal sheet in order to modify the shape of a transverse corrugation, previously formed by the shaping device folding, the punch being associated with a fifth actuator capable of moving said punch between the rest position and the conforming position, and the fourth actuator is controlled so as to move the frame of the conforming device from the front position towards the rear position at a speed V3 which is equal to V1 during the movement of the punch of the folding device from the rest position to an intermediate position in which the punch of the folding device comes into contact with the metal sheet
• FIG. 1 is a view of a corrugated metal sheet intended for the construction of a waterproof membrane of a liquefied natural gas storage tank.
• FIG. 1 is a schematic view of a folding installation according to one embodiment, in an initial state.
• FIG. 1 is a schematic view of the folding installation of the , in a second state.
• FIG. 1 is a schematic view of the folding installation of the in a third state.
• FIG. 1 is a schematic view of the folding installation of the in a fourth state.
• FIG. 1 is a schematic view of the folding installation of the in a fifth state.
• FIG. 1 is a schematic view of the folding installation of the in a sixth state.
• the metal sheet 1 comprises a first series of parallel corrugations 2, extending in a y direction and a second series of parallel corrugations 3 extending in an x direction.
• the x and y directions of the wave series are perpendicular.
• the corrugations 2, 3 project from the side of the internal face of the metal sheet 1, intended to be brought into contact with the fluid contained in the tank.
• the edges of the metal sheet 1 are here parallel to the corrugations 2, 3.
• the metal sheet 1 comprises between the corrugations 2, 3, a plurality of flat surfaces 4. At the level of each crossing between two corrugations 2, 3, the metal sheet 1 comprises a node zone 5.
• the node zone 5 comprises a portion central 6 having a top projecting towards the inside of the tank. Furthermore, the central portion 6 is bordered, on the one hand, by a pair of concave undulations 7 formed in the crest of the corrugation 3 and, on the other hand, by a pair of recesses 8 into which the ripple 2.
• the corrugations 2, 3 of the metal sheet 1 allow the waterproofing membrane to be flexible so that it can be deformed under the effect of thermal and mechanical stresses generated by the fluid stored in the tank.
• the metal sheet 1 can in particular be made of stainless steel, aluminum, Invar ®: that is to say an alloy of iron and nickel, the coefficient of expansion of which is typically between 1.2.10 -6 and 2.10 - 6 K -1 , or in an iron alloy with a high manganese content, the coefficient of expansion of which is typically of the order of 7.10 -6 K -1 .
• Invar ® that is to say an alloy of iron and nickel, the coefficient of expansion of which is typically between 1.2.10 -6 and 2.10 - 6 K -1 , or in an iron alloy with a high manganese content, the coefficient of expansion of which is typically of the order of 7.10 -6 K -1 .
• the use of other metals or alloys is also possible.
• the metal sheet 1 has a thickness of about 1.2 mm. Other thicknesses are also possible, knowing that a thickening of the metal sheet 1 increases its cost and generally increases the rigidity of the corrugations 2, 3.
• a bending installation 9 is described below which makes it possible to form parallel corrugations in a metal sheet 1.
• the installation comprises a coil 10 on which is wound a strip of metal sheet 1.
• the folding installation 9 also comprises a drive device 11 ensuring the advance of the metal sheet 1 in a direction of advance, symbolized by an arrow f, in Figures 2, 3 and 4.
• the drive device 11 comprises one or more pairs of rollers. Each pair of rollers comprises a lower roller and an upper roller intended to be arranged vertically on either side of the metal sheet 1.
• the rollers as well as the coil 10 are articulated around axes of rotation which are horizontal and parallel to them. to each other.
• One or more of the rollers is driven in rotation by a motor so as to ensure the advance of the metal sheet 1.
• the drive device 11 is thus configured to ensure the advance of the metal sheet 1 at a constant speed V1.
• the drive device comprises the coil 10 and a motor arranged to drive the coil 10 in rotation and thus unwind the metal sheet.
• the folding installation 9 also comprises a profiling device configured to form, in the metal sheet 1, one or more longitudinal corrugations, that is to say extending parallel to the direction. in advance f.
• the profiling device comprises, for example, profiling rollers, as described in document KR20150100009.
• the metal sheet 1 which is presented to the folding plant 9 has previously formed corrugations which run parallel to the direction of advance f.
• the folding installation 9 comprises a folding device 12 intended for forming a series of corrugations transverse to the direction of advance f.
• the folding device 12 comprises a frame 13 which is movably mounted parallel to the direction of advance between a rear position, shown in , and a front position, shown in the . To do this, the frame 13 is, for example, guided on rails extending parallel to the direction of advance f.
• the folding installation 9 comprises at least one actuator 14, such as a jack or a motor, which makes it possible to move the frame 13 between the rear position and the front position.
• the folding device 12 further comprises a pusher 15 equipped with a punch 16 which is intended to deform the metal sheet 1 in order to form a transverse corrugation.
• the punch 16 extends in a transverse direction which is orthogonal to the direction of advance f.
• Each punch 16 comprises, at its lower end, a head having a substantially triangular section, that is to say in the form of V.
• the pusher 15 is mounted movably vertically on the frame 13 of the folding device 12 between a high position. of rest, represented on the , and a low folding position, shown in , in which the punch 16 deforms the metal sheet 1 in order to form a transverse corrugation.
• the folding device 12 comprises at least one actuator 17, such as a jack for example, which makes it possible to move the pusher 15 between the upper rest position and the lower folding position.
• the folding device 12 comprises a lower frame 18 which is mounted movably vertically on the frame 13 of the folding device 12 between a low rest position, illustrated in the figure. , and a high folding position, shown in the .
• the folding device 12 comprises at least one actuator 19, such as a jack for example, which makes it possible to move the lower frame 18 between the low rest position and the high folding position.
• the folding device 12 also comprises two lateral dies 20, 21, respectively rear and front, which are mounted, on the lower frame 18, sliding horizontally in a direction parallel to the direction of advance f, for example by means of rails guidance.
• the lateral dies 20, 21 comprise an upper bearing surface of the metal sheet 1.
• Each of the two lateral dies 20, 21 further comprises a concave half-indentation formed in the edge facing the other lateral die 20. 21. When the two side dies 20, 21 are in a close position, the half-indentations together form an indentation corresponding to the shape of the corrugation to be formed.
• the lateral dies 20, 21 each comprise one or more grooves which each correspond to the shape of one of the longitudinal corrugations, each groove being intended upon receipt of a longitudinal corrugation, previously formed in the metal sheet 1.
• the lateral dies 20, 21 are movably mounted on the lower frame 18 between a separated position, shown in , and a close position, shown on the .
• the metal sheet 1 being pressed against the lateral dies 20, 21, for example by means of sidewalls, as described below, the metal sheet 1, during its folding, transmits a force of traction to the side dies 20, 21 which thus moves them from the separated position to the close position.
• the folding device 12 comprises return members, not shown, such as mechanical springs or gas springs for example, which are configured to return the side dies 20, 21 from the close position to the separated position.
• the folding device 12 comprises dedicated actuators, not shown in FIGS. 2 to 5, which make it possible to move or assist the movement of the lateral dies 20, 21 between their separated position and their close position. .
• the folding device 12 further comprises hold-down clamps which extend on either side of the punch 16 and each comprise a clamping surface facing a side dies 20, 21.
• the clamps are mounted so as to be able to move vertically on a clamp support.
• the folding device 12 comprises elastic members which tend to move the hold-down clamps towards a low stop position with respect to their respective hold-down clamp support.
• the wall clamp supports are mounted to slide horizontally on the pusher 15, in a direction parallel to the direction of advance f, between a separated position and a close position.
• the vertical mobility of the clamps relative to the pusher 15 allows said clamps to press the metal sheet 1 against the side dies 20, 21, in an intermediate vertical position of the pusher 15 and then to compensate for the descent of the pusher 15 between the intermediate position and folding position.
• the movement of the pusher 15 towards the low folding position causes the folding of the metal sheet 1 and the latter transmits a tensile force, parallel to the direction of advance, to the hold-downs and thus move the hold-down supports and therefore the hold-downs and side dies 20, 21 from the spread position to the close position.
• the folding device 12 comprises return members, such as mechanical springs or gas springs for example, which are configured to return the sidewalls from the close position to the spread position.
• the folding device 12 can also include dedicated actuators, not shown in FIGS. 2 to 5, which make it possible to move or assist the movement of the clamps between their separated position and their close position. .
• the folding device 12 comprises knives configured to provide concave corrugations in each of the longitudinal corrugations on both sides. Another of the transverse corrugation to be spared.
• knives configured to provide concave corrugations in each of the longitudinal corrugations on both sides.
• another of the transverse corrugation to be spared is described in application WO2017077214.
• the folding installation 9 also comprises a conforming device 22, optional, which is intended to give the transverse corrugations previously formed by the folding device, their final shape.
• the conforming device 22 comprises a frame 23 which is movably mounted parallel to the direction of advance between a rear position, shown in the figure. , and a front position, shown in the , for example by means of guide rails.
• the installation comprises at least one actuator 24, such as a jack or a motor which makes it possible to move the frame 23 between the rear position and the front position.
• the conforming device 22 further comprises a punch 25 which has a shape corresponding to the final shape of the transverse corrugations.
• the punch 25 of the conforming device 22 has a semi-elliptical shape while the punch 16 of the folding device 12 has a substantially triangular shape.
• the punch 25 is mounted to move vertically between a high rest position, shown in , and a low conforming position, shown in , in which the punch 25 deforms the metal sheet 1 in order to give a transverse corrugation, previously formed by the folding device 12, its final shape.
• the shaping device 22 comprises at least one actuator 26, such as a jack, which makes it possible to move the punch 25 between the high rest position and the low conforming position.
• the conforming device 22 also comprises a die 27 which is placed opposite the punch 25 and which comprises an indentation having a shape complementary to that of the punch 25.
• the die 27 is movably mounted on the frame 23 of the conforming device 22 between a low position, shown on the , and a high conforming position, shown in .
• the conforming device 22 comprises at least one actuator 28, such as a jack for example, which allows the die 27 to be moved between the low rest position and the high conforming position.
• the folding installation 9 comprises a control unit 29 which makes it possible to control the various actuators 14, 17, 19, 24, 26, 28 and to synchronize the movement of the components of the folding installation 9.
• the drive device 11 as well as each of the actuators 14, 17, 19, 24, 26, 28, described above, are associated with a position sensor which delivers, to the control unit 29, a signal representative of the speed V1 of advance of the metal sheet 1, signals representative of the position of the frame 13 of the folding device 12, of the pusher 15, of the lower frame 18 and optionally of the side clamps and side dies 20, 21, as well as signals representative of the position of the frame 23 of the conforming device 22, of the punch of the conforming device 22 and of the die 27 of the conforming device 22.
• the control unit 29 comprises a memory and a microprocessor making it possible to store the data and to process them in accordance with the method detailed below. More particularly, the control unit 29 is configured so that the various components of the folding installation 9 follow the kinematics described below.
• a first step between the initial state represented on the and the first intermediate state shown on the , the frame 13 of the folding device 12 and that of the shaping device 22 are moved to their front position respectively at a speed V2 and V3, said speeds V2 and V3 being equal to the speed V1 of advance of the metal sheet 1.
• the metal sheet 1 Downstream of the folding installation 9, the metal sheet 1 is moved at a speed V4 which, in the initial state, is also equal to V1.
• the punch 25 and the die 27 of the conforming device 22 are respectively moved to their low and high conforming position while the pusher 15 and the lower frame 18 of the folding device 12 are respectively moved to their low and high position. folding.
• the lower frame 18 of the folding device 12 reaches the upper folding position before or at the same time as the punch 16 reaches an intermediate position, shown in the figure. , in which it comes into contact with the metal sheet 1 and that, therefore, the bending of the corrugation begins.
• the die 27 of the conforming device 22 reaches the high conforming position before or at the same time as the punch 16 reaches an intermediate position in which it comes into contact with the metal sheet 1.
• the actuator 24 is controlled so that the die 27 of the shaping device 22 is positioned opposite a corrugation previously formed by the folding device 9.
• the actuator 17 moving the punch 16 of the folding device 12 is moved at a speed such that the decrease in the size of the metal sheet 1 due to the bending operation compensates for the advance of the metal sheet 1.
• the speed of the metal sheet 1 downstream of the folding device 12 is therefore zero.
• the speed of decrease in the dimension of the metal sheet 1 in the direction of advance f is substantially equal to the speed V1 of advance of the metal sheet 1.
• the speed of the actuator moving the pusher 15 is thus determined as a function of the geometry of the section of the punch 16 and so that the following equation is respected: ; with : the reduction in the dimension of the metal sheet 1 in the direction of advance f due to the bending operation; and t : the weather.
• the vertical displacement speed V7 of the actuator 17 can be determined such that: the V7 speed is between 0.95 and 1.05 and preferably equal to ; with the angle formed between one of the sides of the substantially triangular section of the punch and a horizontal axis.
• the control unit 29 decreases the speed V2 of movement of the frame 13 of the folding device 12.
• the new speed V2 of the frame 13 of the folding device 12 is increased. between 0.95 x and 1.05 x and substantially corresponds to:
• the metal sheet 1 transmits, during its folding, a tensile force to the lateral dies 20, 21 which them moves from their separated position to their near position.
• the speed of the relative movement of the side dies 20, 21 with respect to the frame 13 of the folding device 12 is equal to
• the absolute speed V5 of the rear side die 20 is substantially equal to V1 while the absolute speed V6 of the front side die 21 is zero.
• the actuator of the side die 20 is controlled to move said side die 20, forwards, by relative to the frame 13, at a speed substantially equal to while the actuator of the side die 21 is controlled to move said side die 21 relative to the frame 13 at a speed substantially equal to .
• the punch of the conforming device 22 has reached the low conforming position in the fourth state, shown in the figure. .
• the installation includes a cutting device, not shown, which allows the metal sheet to be cut downstream from the conforming device 22.

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• 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)
• Mounting, Exchange, And Manufacturing Of Dies (AREA)

Applications Claiming Priority (2)

Publications (3)

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ID=70918560

Family Applications (1)

Country Status (7)

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• 2020
  • 2020-02-06 FR FR2001184A patent/FR3106993B1/fr active Active
• 2021
  • 2021-02-04 WO PCT/EP2021/052654 patent/WO2021156359A1/fr not_active Ceased
  • 2021-02-04 ES ES21710184T patent/ES2977961T3/es active Active
  • 2021-02-04 KR KR1020227030782A patent/KR20220134640A/ko active Pending
  • 2021-02-04 JP JP2022547841A patent/JP7777534B2/ja active Active
  • 2021-02-04 CN CN202180013073.2A patent/CN115066302A/zh active Pending
  • 2021-02-04 EP EP21710184.9A patent/EP4100183B1/de active Active

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