WO2007085041A1 - Active reconfigurable stretch forming - Google Patents
Active reconfigurable stretch forming Download PDFInfo
- Publication number
- WO2007085041A1 WO2007085041A1 PCT/AU2007/000059 AU2007000059W WO2007085041A1 WO 2007085041 A1 WO2007085041 A1 WO 2007085041A1 AU 2007000059 W AU2007000059 W AU 2007000059W WO 2007085041 A1 WO2007085041 A1 WO 2007085041A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- workpiece
- shape
- tool according
- array
- stretch forming
- Prior art date
Links
Classifications
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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
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
-
- 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
- B21D25/00—Working sheet metal of limited length by stretching, e.g. for straightening
-
- 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
- B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
- B21D11/08—Bending by altering the thickness of part of the cross-section of the work
- B21D11/085—Bending by altering the thickness of part of the cross-section of the work by locally stretching or upsetting
-
- 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
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/20—Deep-drawing
- B21D22/26—Deep-drawing for making peculiarly, e.g. irregularly, shaped articles
-
- 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
- B21D24/00—Special deep-drawing arrangements in, or in connection with, presses
-
- 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
- B21D24/00—Special deep-drawing arrangements in, or in connection with, presses
- B21D24/10—Devices controlling or operating blank holders independently, or in conjunction with dies
-
- 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
- B21D24/00—Special deep-drawing arrangements in, or in connection with, presses
- B21D24/10—Devices controlling or operating blank holders independently, or in conjunction with dies
- B21D24/14—Devices controlling or operating blank holders independently, or in conjunction with dies pneumatically or hydraulically
-
- 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
- B21D25/00—Working sheet metal of limited length by stretching, e.g. for straightening
- B21D25/02—Working sheet metal of limited length by stretching, e.g. for straightening by pulling over a die
-
- 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
- B21D31/00—Other methods for working sheet metal, metal tubes, metal profiles
- B21D31/04—Expanding other than provided for in groups B21D1/00 - B21D28/00, e.g. for making expanded metal
-
- 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
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/02—Die constructions enabling assembly of the die parts in different ways
-
- 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
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/04—Movable or exchangeable mountings for tools
-
- 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
- B21D53/00—Making other particular articles
-
- 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
- B21D53/00—Making other particular articles
- B21D53/88—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards
- B21D53/883—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards reflectors
Definitions
- the invention is an active reconfigurable stretch forming tool, and in another aspect the invention is a method of stretch forming.
- the tool and method are useful in the forming of three dimensional shapes in solid sheet metal or mesh, to produce panels for reflector antennas.
- the "bed of bolts” methods involves laying sheetmetal strips over an array of adjustable bolts attached to a large flat table. The bolts are adjusted in height to represent the curvature required.
- Strips of sheetmetal sufficiently narrow to take the required curvature with only elastic deformation are laid across the tops of the bolts and are then pulled down by vacuum bagging. Whilst the strips are held in shape by a modest vacuum, a rigid backing structure is bonded to the open side, to hold the strips permanently in the formed shape.
- Press forming involves compressing a sheet of material between shaped dies.
- the material is deformed plastically so that it permanently retains the pressed shape.
- the material may be either plastically stretched or compressed, or both, during forming. Some spring back or "recovery” occurs after the pressing forces are removed, so the shape of the forming dies is not necessarily the same as the shape of the completed panel.
- Forming an accurate shape free from wrinkles and buckles is complex and may involve a large number of iterations to the shape and details of the forming dies.
- the dies are typically made from hardened tool steel, are large and expensive, and may only produce one shape each. Large presses up to many hundreds of tonnes in capacity are required to operate the dies. However, once the dies have been proven, production of repetition parts is extremely fast.
- Hydroforming involves stretching a flat panel into a shaped die under hydraulic pressure. The material then retains the shape of the die. Like press forming, the material will recover to some degree after forming.
- the hydroforming process for manufacture of antenna dishes has been put to commercial use by Anderson
- Hydroforming dies are large, but simple in comparison to press form dies, and may be made from soft materials or backed with polymer filling compounds to simplify shaping, No large press is required. Extremely large panels may be produced, but the die, once corrected and proven, will only produce parts of one shape, and variations in the properties of the workpiece material may affect the repeatability of the recovery after forming.
- Stretch Forming covers a number of areas of metal forming, from the shaping of curved beams to the shaping of panels for aircraft and automotive bodies. Like press forming and hydroforming, a shaped die or stretch form tool is required.
- the sheet In the case of stretch forming of sheet material, the sheet is strongly gripped along two opposing edges and supported above a shaped form block.
- the form block is then driven up underneath the tightly stretched sheet (or the grippers move downwards), until the shape of the form tool is reproduced in the material, in a manner similar to stretching a sheet of thin rubber over, say, a football. This is illustrated in
- Fig. 1 In Fig. l(a) a sheet of material is shown gripped above a form block for stretching. In Fig. l(b) stretching load is applied by the grippers and the form block is moved relative to the sheet to the point of contact. In Fig. l(c) forming is complete.
- a piece of material has been deformed by application of a bending load.
- Tensile and compressive stresses are generated within the material as it is bent. These stresses increase in magnitude towards the outside faces of the material and there is a neutral axis in the centre where no tensile or compressive stresses exist.
- AU materials will recover elastically to some degree after plastic deformation, in a direction opposing that of the applied deformation stresses. In this case the uneven distribution of stresses will cause the material to straighten slightly after the bending load is removed, and the final curvature will be noticeably less than intended.
- Fig. 2b the material has been both bent and stretched along its own axis. If the stretching load is sufficient to cause yielding or slight plastic deformation in this direction, the stresses within the material will change to an even distribution of tensile stress. Later, when the stretching load is removed, the elastic recovery occurs along the centreline of the material, with little or no change in overall shape.
- An hydraulically powered machine called a stretch former, is used to carry out this process. It consists of a base or table on which the stretch form tool is mounted, and an array of grippers on two sides that hold the edges of the workpiece while it is being stretched over the form block. The grippers simultaneously apply a sufficiently large stretching load to cause the workpiece material to yield across its full width. Stretch formers are relatively common in industrial use.
- Stretch forming has traditionally been performed over solid form blocks, made from metal, hard plastics and occasionally wood where shapes are modest and accuracy is not critical.
- Stretch forming is a fairly fast process, but the need for manufactured form tools and the limitations imposed by form blocks with fixed shapes, have prompted development of reconfigurable tools consisting of an array of adjustable elements that can be set to form an approximation to a continuous curved surface, in a manner similar to the Bed of Bolts described above.
- FIG. 3 A representation of a reconfigurable stretch form tool with a 6 x 6 array of adjustable elements is shown in Fig. 3.
- the elements are typically domed on their working faces, rather than flat-ended as shown.
- the surface of the reconfigurable form block is composed of individual facets rather than a continuous surface
- a layer of conformable material such as a sheet of polymer rubber is laid over the top of the form tool to prevent dimpling of the workpiece.
- This layer is known as an interpolator.
- the effective pressure between the interpolator and the workpiece material can vary, resulting in differing degrees of compression of the interpolator over the top of the form tool elements. This results in a departure of the shape of the formed part from the nominal surface defined by the tool elements.
- a first aspect of the invention is an active reconfigurable stretch forming tool for forming a three dimensional shape in a solid sheet metal or mesh workpiece, to produce a panel for a reflector antenna.
- the tool comprises:
- An array of extensible shape forming elements which are driven in extension to produce the same force per unit area across a workpiece during shape forming.
- an array of limit switches located in front of the array of shape forming elements, such that each shape forming element is driven in extension towards a respective limit switch during shape forming.
- each limit switch is activated by the workpiece as it is shaped and each switch, upon activation, prevents further extension of the respective driven element.
- the array of limit switches defines the shape to be imparted to the workpiece.
- the active reconfigurable tool achieves shape control of the workpiece by directly measuring the workpiece during shaping.
- the tool also permits variation of the shape produced, and facilitates correction of systematic shape-forming errors, such as deformation of the tool structure or compression of an interpolator. Further, the tool may incorporate shape-control feedback or error correction as shaping proceeds.
- the tool may be used in a conventional industrial stretch forming machine, with no significant modifications to the machine's usual set-up or operation.
- the conventional opposing sets of workpiece grippers maybe used.
- the shape forming elements may comprise hydraulic cylinders and rams each of which is powered from a single hydraulic power supply. Since the hydraulically powered elements are connected via hydraulic lines to a single power supply, the hydraulic pressure in the cylinders will be equalised. This prevents any one cylinder causing localised excessive deformation of the workpiece.
- Each ram may be surmounted by a tilting pad and each tilting pad may be interlocked with its adjacent pads to form a continuous articulated surface.
- the array of elements may be sparse compared to a conventional reconfigurable stretch forming tool.
- the tilting pads may be provided with a spherical seat to fit spherical ends on the hydraulic cylinder rams.
- An interpolator may be located on the articulated surface to receive the workpiece.
- the rams will generally be arranged below the workpiece to produce concave workpieces.
- An extension of the invention is to place an array of rams both above and below the workpiece. This will allow the production of panels with both concave and convex curvature.
- the limit switches may be aligned vertically over respective tilting pads. Other locations for the limit switches may be used, provided they can be actuated by the movement of the workpiece, interpolator, or ram, as the formation of the workpiece shape proceeds.
- Each switch may be connected to a simple solenoid valve in the hydraulic line leading to its respective cylinder. As the workpiece is shaped it will contact one or more of the limit switches, and as soon as this occurs the switch operates to close the solenoid valve and prevent further movement of the respective tilting pad.
- the switches themselves may be simple On-Off mechanical switches.
- the switches may be constant-contact analogue devices, and they may be programmed or set to trigger at the appropriate height.
- multi-staged forming where a panel is formed to initial,-intermediate-fmal, or roughing-f ⁇ nishing stages. This graduated approach may be beneficial where deep shapes or high accuracy, or both, are required, by avoiding excessive stretching or the possibility of buckling in any one stage.
- the shaping surfaces of the tilting pads may be formed with a spherical radius approximating the curvature of the required panel.
- a number of sets of tilting pads with a range of spherical radii may be provided for the tool.
- the top of each tilting pad could be made flat, with provision for clipping inserts of varying spherical radius into place.
- Another aspect of the invention is a method for forming three dimensional shapes in a solid sheet metal or mesh workpiece, to produce a panel for a large reflector antenna.
- the method comprises: Stretching a metal workpiece in a flat state in front of an array of extensible shape forming elements. Driving each shape forming element of the array in extension to produce the same force per unit area across the workpiece, to form a shape in the workpiece.
- each shape forming element Extending each shape forming element towards a respective limit switch during shape forming until the workpiece activates the limit switch. Preventing further extension of a shape forming element upon activation of the respective limit switch.
- the shape forming elements may comprise hydraulic rams, and the method may produce panels of any curvature within the travel available in the hydraulic rams.
- Variations between measured and theoretical panel shapes may be accommodated in the settings of the limit switch array. If the limit switch array is also used for shape measurement, it may be possible to implement an automatic process with closed-loop shape control.
- large sections of panel may be formed from one piece of material, eliminating the time and labour involved in laying up the numerous individual strips required by the bed of bolts method.
- one-piece panels rigidly formed to an accurate shape eliminates the need for multiple pre-formed backing ribs to hold the panel's shape, and the need for the ribs to be aligned with the joints between individual strips. This will allow the backing structure to be designed for stiffness and economy without constraints imposed by the layout or curvature of the panel.
- the method makes use of existing metal forming machinery and techniques, off the shelf parts, and a simple control system.
- the method proposed offers significant improvements in terms of cost and versatility while maintaining equivalent surface accuracy to the best methods currently available.
- Fig. 1 is a series of schematic diagram illustrating stretch forming.
- Fig. l(a) a sheet of material is shown gripped above a form block for stretching.
- Fig. l(b) stretching load is applied by the grippers and the form block is moved relative to the sheet, to the point of contact.
- Fig. l(c) forming is complete.
- Fig. 2(a) is a diagram showing the distribution of tensile and compressive stresses during bending of a piece of material.
- Fig. 2(b) is a diagram showing the distribution of tensile-only stresses during stretch forming.
- Fig. 3 is a diagram showing a reconf ⁇ gurable stretch-form tool with a 6 x 6 array of adjustable elements.
- Fig. 4 is a series of diagrams illustrating the principle of operation of an active stretch forming tool.
- Fig. 4(a) shows a reconf ⁇ gurable stretch tool in an industrial stretch forming machine before stretching commences
- Fig. 4(b) shows the reconfigurable stretch tool at an intermediate point of stretching.
- Fig. 4(c) shows the tool when stretching is completed.
- Fig. 5(a) is a diagram showing a tilting pad for the tool of Fig. 4.
- Fig. 5(b) is the pad of Fig. 5(a) inverted.
- Fig. 6 is a diagram showing three interlocking pads forming an articulated surface.
- Fig. 7(a) illustrates a model of an array of rams and tilting pads below an array of stops.
- Fig. 7(b) shows how the array of pads tilt and orient to form the curve defined by the stops when they are brought into contact with each other.
- reconf ⁇ gurable stretch forming tool 10 involves a sparsely populated array of elements 12.
- Each element 12 comprises an hydraulic cylinder 14 all of which are powered from a single hydraulic power supply 16.
- An hydraulic ram 18 may be driven upwards by each cylinder 14.
- the tool may be used in a conventional industrial stretch forming machine, with no significant modifications to the machine's usual set-up or operation.
- each ram 18 is surmounted by a tilting pad 20.
- Each tilting pad 20 is interlocked with its adjacent pads to form a continuous articulated surface indicated generally at 22.
- a polymer interpolator 24 is placed between the pads 20 and the workpiece 26 which is held by grippers 28 and 30.
- the material 26 is held stretched in the flat state while the rams 18 of the reconf ⁇ gurable tool are driven upwards, so forming a three dimensional shape in the panel.
- the hydraulically powered elements 12 are not individually controlled. As they are connected via hydraulic lines to a single power supply 16, the hydraulic pressure in the cylinders will be equalised. This prevents any one cylinder causing localised excessive deformation of the workpiece 26. Above the workpiece 26 is suspended an array of limit switches 32, aligned vertically over each active element 12. Each switch 32 is connected to a simple solenoid valve 34 in the hydraulic line leading to its relevant cylinder 14. The switches 32 themselves maybe simple On-Off mechanical limit switches of the types often used in industrial machinery, where switching occurs on contact. Alternatively, the switches may be constant-contact analogue devices like linear voltage differential transducers (LVDTs), programmed or set to trigger at the appropriate height.
- LVDTs linear voltage differential transducers
- the positions of the array of limit switches defines the shape of the workpiece that will be produced. It is anticipated that the setting of the limit switch array will be performed according to the method described in [I].
- the interpolator sits on the relatively continuous surface 22, and the combined effect is to prevent localised high-spots that could dimple the workpiece 26 between points measured by the limit switch array.
- the tilting pads 20 are provided with a spherical seat 36 on one side to fit spherical ends 38 on the hydraulic cylinder rams 18.
- a simple wire circlip can be used to retain the pads on the rams after forming, when the hydraulic cylinders retract to their rest position.
- the upper surfaces of the tilting pads 20 are formed with a spherical radius approximating the curvature of the required panel.
- each tilting pad could be made flat, with provision for clipping inserts of varying spherical radius into place.
- Fig. 5 shows a possible design of tilting pad 20, and illustrates the features 38 and 40 that interlock with adjacent pads to form an articulated surface, and the socket for mounting the pad on the hydraulic ram.
- Fig. 6 illustrates the interlocking of a number of pads 20.
- Fig. 7(a) illustrates a model of an array of rams and tilting pads 42 below an array of stops 44.
- Fig. 7(b) shows how the array of pads 42 tilt and orient to form the curve defined by the stops 44 when they are brought into contact with each other.
- an antenna of 15m diameter with an f/d of 0.4 gives a focal length of 6m.
- the minimum instantaneous radius of a parabola equals twice the focal length, it is necessary to stretch form of a section of a spherical surface with a radius of 12m, from aluminium sheet with a thickness of 1.2mm.
- the material considered is grade 5005-H34, which has a yield stress of 138 MPa [9].
- This stretch forming process is analogous to hydroforming, where hydraulic pressure is used to deform a flat sheet. If allowed to proceed unrestrained, both processes will tend to produce a spherical radius.
- the yield stresses generated in the workpiece by the stretch forming grippers are equivalent to the tensile stresses in the walls of a pressure vessel. Therefore the contact pressure on any of the tilting pads is equivalent to the internal pressure in a vessel of the same radius with the same tensile wall stress.
- the equivalent internal pressure is therefore 0.276 MPa. This is the nominal surface pressure that would be present on a tilting pad to stretch form a panel to a radius of 12m.
- the hydraulic pressure necessary to produce this load on a 75 mm piston is 1.19 MPa. When allowances for losses are considered, a minimum system pressure of approximately 2.5 MPa is required.
- Industrial hydraulic systems built from off-the-shelf parts typically operate at system pressures ranging from 20 MPa to 60 MPa, so the hydraulic pressure requirements are very modest.
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2007209756A AU2007209756B2 (en) | 2006-01-25 | 2007-01-23 | Active reconfigurable stretch forming |
DE200711000212 DE112007000212T9 (en) | 2006-01-25 | 2007-01-23 | Active reconfigurable stretch forming |
EP07700085A EP1976651B1 (en) | 2006-01-25 | 2007-01-23 | Active reconfigurable stretch forming |
ES07700085T ES2373749T3 (en) | 2006-01-25 | 2007-01-23 | CONFORMATION BY ACTIVE RECONFIGURABLE STRETCHING. |
US12/162,317 US20100043511A1 (en) | 2006-01-25 | 2007-01-23 | Active reconfigurable stretch forming |
GB0812950A GB2447204B (en) | 2006-01-25 | 2007-01-23 | Active reconfigurable stretch forming |
US14/484,949 US20150068261A1 (en) | 2006-01-25 | 2014-09-12 | Active reconfigurable stretch forming |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2006900369A AU2006900369A0 (en) | 2006-01-25 | Method for stretch forming of panels for reflector antennas using active reconfigurable tooling | |
AU2006900369 | 2006-01-25 |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/162,317 A-371-Of-International US20100043511A1 (en) | 2006-01-25 | 2007-01-23 | Active reconfigurable stretch forming |
US14/484,949 Continuation US20150068261A1 (en) | 2006-01-25 | 2014-09-12 | Active reconfigurable stretch forming |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007085041A1 true WO2007085041A1 (en) | 2007-08-02 |
Family
ID=38308774
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AU2007/000059 WO2007085041A1 (en) | 2006-01-25 | 2007-01-23 | Active reconfigurable stretch forming |
Country Status (10)
Country | Link |
---|---|
US (2) | US20100043511A1 (en) |
EP (1) | EP1976651B1 (en) |
CN (2) | CN102554008B (en) |
AU (1) | AU2007209756B2 (en) |
DE (1) | DE112007000212T9 (en) |
ES (1) | ES2373749T3 (en) |
GB (1) | GB2447204B (en) |
HK (1) | HK1173106A1 (en) |
WO (1) | WO2007085041A1 (en) |
ZA (1) | ZA200806368B (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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GB2442793A (en) * | 2006-10-10 | 2008-04-16 | Apogee Antennas Ltd | Forming curved panels |
EP2628555A4 (en) * | 2010-10-13 | 2017-01-25 | Shiroki Corporation | Method and apparatus for bending long member, and method for bending door frame |
US10603710B2 (en) | 2014-01-29 | 2020-03-31 | University Of Ulster | Reconfigurable metal forming apparatus |
US11033947B2 (en) | 2015-10-12 | 2021-06-15 | Tirnaform Limited | Method and apparatus for forming double curvature corrugated and surface textured panels |
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CN103495635B (en) * | 2013-09-30 | 2015-04-08 | 中国航空工业集团公司北京航空制造工程研究所 | Skin stretch-forming method with transition sectional face of flexible multipoint mould |
KR101501224B1 (en) * | 2014-02-12 | 2015-03-13 | 주식회사 스틸플라워 | individual control clamping multi-point stretching forming apparatus for manufacturing curved plate |
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CN105965779B (en) * | 2016-05-27 | 2018-11-23 | 泉州市小新智能科技有限公司 | A kind of fast mould |
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US11090706B2 (en) | 2017-07-26 | 2021-08-17 | Ford Global Technologies, Llc | Method to reduce tool marks in incremental forming |
CN113042617B (en) * | 2019-12-26 | 2022-04-26 | 上海交通大学 | Processing method for gradually forming mixed track based on interpolation transformation algorithm |
CN114375974B (en) * | 2022-01-24 | 2022-07-12 | 中国农业大学 | Biscuit customization processing equipment with variable mold and processing method |
US20230286229A1 (en) * | 2022-03-08 | 2023-09-14 | The Boeing Company | Forming a curvature into a charge |
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2007
- 2007-01-23 AU AU2007209756A patent/AU2007209756B2/en not_active Ceased
- 2007-01-23 US US12/162,317 patent/US20100043511A1/en not_active Abandoned
- 2007-01-23 GB GB0812950A patent/GB2447204B/en not_active Expired - Fee Related
- 2007-01-23 EP EP07700085A patent/EP1976651B1/en not_active Expired - Fee Related
- 2007-01-23 ES ES07700085T patent/ES2373749T3/en active Active
- 2007-01-23 CN CN201210032383.1A patent/CN102554008B/en not_active Expired - Fee Related
- 2007-01-23 DE DE200711000212 patent/DE112007000212T9/en not_active Expired - Fee Related
- 2007-01-23 WO PCT/AU2007/000059 patent/WO2007085041A1/en active Application Filing
- 2007-01-23 CN CNA2007800066685A patent/CN101389420A/en active Pending
-
2008
- 2008-07-22 ZA ZA200806368A patent/ZA200806368B/en unknown
-
2013
- 2013-01-08 HK HK13100238.7A patent/HK1173106A1/en not_active IP Right Cessation
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2014
- 2014-09-12 US US14/484,949 patent/US20150068261A1/en not_active Abandoned
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2442793A (en) * | 2006-10-10 | 2008-04-16 | Apogee Antennas Ltd | Forming curved panels |
EP2628555A4 (en) * | 2010-10-13 | 2017-01-25 | Shiroki Corporation | Method and apparatus for bending long member, and method for bending door frame |
US10603710B2 (en) | 2014-01-29 | 2020-03-31 | University Of Ulster | Reconfigurable metal forming apparatus |
US11033947B2 (en) | 2015-10-12 | 2021-06-15 | Tirnaform Limited | Method and apparatus for forming double curvature corrugated and surface textured panels |
Also Published As
Publication number | Publication date |
---|---|
ES2373749T3 (en) | 2012-02-08 |
GB0812950D0 (en) | 2008-08-20 |
ZA200806368B (en) | 2009-12-30 |
CN101389420A (en) | 2009-03-18 |
US20150068261A1 (en) | 2015-03-12 |
EP1976651B1 (en) | 2011-08-31 |
EP1976651A1 (en) | 2008-10-08 |
GB2447204B (en) | 2011-03-09 |
GB2447204A (en) | 2008-09-03 |
HK1173106A1 (en) | 2013-05-10 |
AU2007209756B2 (en) | 2011-05-26 |
EP1976651A4 (en) | 2010-05-12 |
AU2007209756A1 (en) | 2007-08-02 |
DE112007000212T5 (en) | 2009-02-05 |
US20100043511A1 (en) | 2010-02-25 |
DE112007000212T9 (en) | 2009-06-04 |
CN102554008A (en) | 2012-07-11 |
CN102554008B (en) | 2015-02-25 |
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