EP1157762A1 - Kuppel aus einer Aluminiumlegierung, insbesondere zum Formen eines Tankbodens, und dessen Herstellungsverfahren - Google Patents

Kuppel aus einer Aluminiumlegierung, insbesondere zum Formen eines Tankbodens, und dessen Herstellungsverfahren Download PDF

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Publication number
EP1157762A1
EP1157762A1 EP01401242A EP01401242A EP1157762A1 EP 1157762 A1 EP1157762 A1 EP 1157762A1 EP 01401242 A EP01401242 A EP 01401242A EP 01401242 A EP01401242 A EP 01401242A EP 1157762 A1 EP1157762 A1 EP 1157762A1
Authority
EP
European Patent Office
Prior art keywords
blank
mold
frustoconical
pressure
internal face
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Withdrawn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
EP01401242A
Other languages
English (en)
French (fr)
Inventor
Georges Favre-Marinet
Jean-Pierre Bonnafe
Jacques Chanteranne
Joel Delmotte
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.)
EADS Space Transportation SA
Original Assignee
EADS Launch Vehicles SA
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 EADS Launch Vehicles SA filed Critical EADS Launch Vehicles SA
Publication of EP1157762A1 publication Critical patent/EP1157762A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/021—Deforming sheet bodies
    • 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
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • 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
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/021—Deforming sheet bodies
    • B21D26/023—Deforming sheet bodies including an additional treatment performed by fluid pressure, e.g. perforating
    • 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
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/021—Deforming sheet bodies
    • B21D26/031—Mould construction
    • 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
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/18—Making hollow objects characterised by the use of the objects vessels, e.g. tubs, vats, tanks, sinks, or the like
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49904—Assembling a subassembly, then assembling with a second subassembly
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49906—Metal deforming with nonmetallic bonding

Definitions

  • the present invention relates to an aluminum alloy dome, especially intended to form a tank bottom, and its manufacturing process.
  • rockets and space shuttles have tanks large dimensions for storing fuels intended for their propulsion.
  • the bottom of such tanks is made of aluminum alloy and has the shape of a dome several meters in diameter.
  • Such a manufacturing method in particular because of the number high of component parts and significant lengths of the many welding lines, is long and expensive. Also, the main purpose of the present invention is to reduce the cost of manufacturing such backgrounds tanks.
  • the dome of an aluminum alloy capable of being welded, in particular intended to form a tank bottom is remarkable in that it consists of a shaped bowl rounded with an opening at the top and a welded cap on said bowl to close off said opening.
  • the dome according to the present invention is formed only of two pieces - the bowl and the cap - along a single line of welding of relatively limited length. This therefore results in a reduction significant manufacturing costs compared to the usual method mentioned above.
  • said cap can be easily manufactured by any known forming operation.
  • the applicant has developed a particularly advantageous.
  • said bowl has a constant thickness at all points or on the contrary presents a thickness reinforced in some of its zones, by providing in consequently the thickness distribution of said piece (s) flat (s) in the shape of a crown portion, from which is carried out the frustoconical draft.
  • said treatment is continued thermal with pressure by a third tempering phase allowing structurally hardening said open bowl at the top.
  • Said deformable anti-buckling pressure wall can be formed by a set of deformable blades, preferably curved, distributed at the periphery of the internal face of said frustoconical blank. So he is advantageous that said deformable blades are integral with each other others at their ends close to said small base of the frustoconical blank, for example by means of a peripheral strip.
  • said frustoconical blank and said pressure wall is preferably exerted by a pressure bladder introduced at the interior of said frustoconical blank.
  • the wall of said mold is then advantageously pierced with through holes through which we can make the vacuum between said bladder and the internal face of the mold cavity, in order to pressing said bladder against said frustoconical blank and said wall of pressure to deform them until they are pressed against the face internal of said mold cavity.
  • a connection is provided sliding with limit stop between the edge of the opening of the mold and the large base of said frustoconical blank.
  • the large base of the frustoconical blank can carry an internal protruding rim participating in said limit stop.
  • Figures 1 and 2 show, flat, examples of flat parts in the shape of a crown portion, from which the dome, in accordance with the present invention.
  • Figure 3 schematically illustrates the bending of the parts of the figures 1 and 2.
  • Figure 4 shows in perspective a frustoconical blank obtained from the parts of Figures 1 and 2.
  • Figure 5 shows in schematic perspective a mold for the implementation of the invention, during the introduction of the frustoconical blank and the deformable pressure wall.
  • FIG. 6 shows an alternative embodiment of said wall of deformable pressure.
  • FIG. 7 illustrates, in schematic section, said frustoconical blank in its initial position in the mold.
  • FIG. 8 is a top view corresponding to FIG. 7.
  • Figures 9 and 10 correspond respectively to Figures 7 and 8, after the installation of a pressure bladder.
  • Figure 11 illustrates, in schematic section, the mold with said frustoconical blank in its predetermined blocked swallowing position.
  • Figure 12 illustrates, also in schematic section, said blank in its final position in the mold.
  • Figure 13 is a diagram illustrating the heat treatment with pressure exerted on said frustoconical blank in said mold.
  • Figure 14 illustrates the rounded bowl as it leaves the mold.
  • FIG. 15 illustrates control tests carried out on said bowl.
  • Figure 16 shows, in exploded schematic elevation, the dome according to the present invention.
  • FIGs 1 and 2 show aluminum alloy plates 1 and 2, in which flat pieces are cut in the form of crown portion, 3 and 4 respectively.
  • Plates 1 and 2 are by example consisting of known alloys 2219 or 2195, which are found the non-returned state (T37).
  • a blank is produced 5 in the form of a truncated cone (see FIG. 4) by bending on a form 6 (see Figure 3) and welding along opposite generators. On the face 4, there is shown a welding line 7 for closing the blank tapered 5.
  • a mold 9 is produced, delimiting a cavity 10, the internal face 10I of which has the shape of a rounded bowl, for example spherical.
  • the mold 9 is closed at its apex and, on the opposite side thereof, is provided with an opening 11, bordered by a peripheral rim 12 projecting outwards.
  • the wall of the mold 9 is pierced with a plurality of through holes 13.
  • the mold 9 is carried by feet 14, only shown in FIG. 5.
  • a deformable pressure wall 15 is also produced, by example of conical shape (figure 5) or barrel shape (figure 6), made up of blades 16, interconnected by a common heel 17.
  • the pressure wall is made for example of an aluminum alloy similar to that constituting the blank 5 and it is shaped to be able to be housed in the frustoconical blank 5, in contact with the internal face 5I thereof, at vicinity of the small base 5b of said blank and all around said internal face 5I.
  • the deformable pressure wall 15 is arranged inside the frustoconical blank 5, against the face internal 5I thereof, in the vicinity of the small base 5b of said blank.
  • each tab 18 has a descending arm 19, inside the rim 8 of the blank 5 and provided at its end with a hook 20, disposed under said rim 8. In said initial position, each hook 20 is at a distance d to below the rim 8 of the blank 5.
  • a pressure bladder 21 is arranged inside the blank frustoconical 5 and is tightly fixed, by means of fasteners 22, on the periphery of the inlet 11 of the mold 9.
  • the mold 9 thus equipped of the frustoconical blank 5, of the pressure wall 15, of the legs 18 and the pressure bladder 21 is introduced into a thermal enclosure 23, equipped with means (not shown) capable of creating a vacuum, through the through holes 13, in the space between the internal face 10I and the bladder 21.
  • FIG. 13 illustrates an example of heat treatment with pressure to which the frusto-conical blank 5 and the pressure wall 15 are subjected.
  • the variations in temperature T are shown as a function of time t thermal enclosure 23 (curve 24), of the pressure P exerted by the pressure bladder 21 (curve 25) and of the swallowing a of the blank 5 by the mold 9 (curve 26).
  • This example of heat treatment essentially comprises four successive phases I to IV.
  • the first phase I begins at an initial instant to, at which the mold 9, the frustoconical blank 5, the pressure wall 15 and the bladder 21 are in the relative positions shown in FIG. 9. At this time, the swallowing a is zero.
  • the temperature T of the enclosure 23 (for example an autoclave) increases regularly until a forming value TF (for example of the order of 120 ° C.), reached at the end of phase I (instant t2).
  • a vacuum is created between the internal face 10I of the mold cavity 9 and the bladder 21 through the through holes 13 (arrows 27), so that the pressure exerted by the latter bladder on the frustoconical blank 5 and on the pressure wall 15 increases progressively (curve 25).
  • phase II starting at time t2, the temperature T is maintained at the forming value TF and the pressure P is increased to a level value p , the swallowing remaining constant and equal to the value d.
  • time t3 at which phase II ends, the forming of the blank 5 is finished and the corresponding state of the different elements is shown in FIG. 12.
  • phase III of income during which the temperature T is raised and maintained at the value TR income, for example of the order of 170 ° C. Draft 5, now shaped like a rounded bowl, it is therefore structurally hardened.
  • the blank 5 shaped like a rounded bowl and provided with an opening 28 at its top came out of the mold 9 and was cut along a line 29 along its large base, to eliminate the projecting internal rim 8 (see FIG. 14).
  • the open bowl 30 is then obtained, shown in FIG. 15.
  • the accuracy of the rounded shape of the bowl 30 is checked by a set of geometric sensors 31, while non-destructive testing of the quality of the wall of this bowl 30 is carried out by a device 32 (X-ray and / or eddy current control).
  • a crown cap 33 having been manufactured elsewhere, by the implementation of any known technique (for example stamping), it is attached and welded to said bowl 30 to close the opening 28.
  • a dome 34 is thus obtained in accordance with the present invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
EP01401242A 2000-05-22 2001-05-15 Kuppel aus einer Aluminiumlegierung, insbesondere zum Formen eines Tankbodens, und dessen Herstellungsverfahren Withdrawn EP1157762A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0006503 2000-05-22
FR0006503A FR2809033B1 (fr) 2000-05-22 2000-05-22 Dome en alliage d'aluminium, notamment destine a former un fond de reservoir, et son procede de fabrication

Publications (1)

Publication Number Publication Date
EP1157762A1 true EP1157762A1 (de) 2001-11-28

Family

ID=8850468

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01401242A Withdrawn EP1157762A1 (de) 2000-05-22 2001-05-15 Kuppel aus einer Aluminiumlegierung, insbesondere zum Formen eines Tankbodens, und dessen Herstellungsverfahren

Country Status (5)

Country Link
US (1) US6629353B2 (de)
EP (1) EP1157762A1 (de)
JP (1) JP2003534133A (de)
FR (1) FR2809033B1 (de)
WO (1) WO2001089733A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010013207A1 (de) 2010-03-29 2011-09-29 Mt Aerospace Ag Verfahren zum Umformen von wenigstens einem im Wesentlichen ebenflächigen Rohling zu einem Schalenkörper und dessen Verwendung

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010013206B4 (de) * 2010-03-29 2013-09-05 Mt Aerospace Ag Verfahren zum Umformen eines im Wesentlichen ebenflächigen Rohlings zu einem Schalenkörper und dessen Verwendung
CN104368682B (zh) * 2013-08-14 2016-03-16 晟铭电子(宁波）有限公司 多纵孔灯罩加工方法
CN112077225A (zh) * 2020-08-27 2020-12-15 绍兴市奥达化工设备有限公司 一种封头的制备工艺

Citations (6)

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Publication number Priority date Publication date Assignee Title
FR1159269A (fr) * 1956-09-20 1958-06-25 Const Aero Navales Installation pour l'emboutissage et le détourage de pièces de révolution
US3572073A (en) * 1969-03-10 1971-03-23 Walter B Dean Method of shaping a thin-walled body
US3739617A (en) * 1970-09-21 1973-06-19 Boeing Co High temperature vacuum creep forming fixture
FR2326997A1 (fr) * 1975-10-07 1977-05-06 Charlatte Maurice Procede d'hydroformage
US4252244A (en) * 1979-05-18 1981-02-24 Nooter Corporation Layered pressure vessel head with machined surfaces
US5152452A (en) * 1992-03-10 1992-10-06 York Industries, Inc. Pressure vessel and method

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US4024623A (en) * 1973-06-21 1977-05-24 Union Carbide Corporation Manufacture of isostress contoured dies
US4181235A (en) * 1978-01-09 1980-01-01 Kaiser Aluminum & Chemical Corporation Liquefied natural gas tank construction
KR890002489B1 (ko) * 1982-03-08 1989-07-10 도오요오 세이깐 가부시기가이샤 금속관(金屬罐)의 제조방법과 장치
US5295804A (en) * 1992-07-27 1994-03-22 Dinnan Timothy P Female mold including decorating insert for differential pressure forming
US5665439A (en) * 1992-08-11 1997-09-09 E. Khashoggi Industries Articles of manufacture fashioned from hydraulically settable sheets
US5794341A (en) * 1995-12-28 1998-08-18 Aircraft Gear Corporation Method for assembling a constant velocity universal joint
US6151939A (en) * 1996-01-04 2000-11-28 Delaware Capital Formation, Inc. Can shaping apparatus
US5697511A (en) * 1996-09-27 1997-12-16 Boeing North American, Inc. Tank and method of fabrication
FR2762304B1 (fr) * 1997-04-21 1999-05-28 Pechiney Emballage Alimentaire Capsule a manchon en matiere plastique
US6364197B1 (en) * 2000-08-04 2002-04-02 The Boeing Company Friction stir welding of containers from the interior

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1159269A (fr) * 1956-09-20 1958-06-25 Const Aero Navales Installation pour l'emboutissage et le détourage de pièces de révolution
US3572073A (en) * 1969-03-10 1971-03-23 Walter B Dean Method of shaping a thin-walled body
US3739617A (en) * 1970-09-21 1973-06-19 Boeing Co High temperature vacuum creep forming fixture
FR2326997A1 (fr) * 1975-10-07 1977-05-06 Charlatte Maurice Procede d'hydroformage
US4252244A (en) * 1979-05-18 1981-02-24 Nooter Corporation Layered pressure vessel head with machined surfaces
US5152452A (en) * 1992-03-10 1992-10-06 York Industries, Inc. Pressure vessel and method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010013207A1 (de) 2010-03-29 2011-09-29 Mt Aerospace Ag Verfahren zum Umformen von wenigstens einem im Wesentlichen ebenflächigen Rohling zu einem Schalenkörper und dessen Verwendung
WO2011124341A1 (de) 2010-03-29 2011-10-13 Mt Aerospace Ag Verfahren zum umformen von wenigstens einem im wesentlichen ebenflächigen rohling zu einem schalenkörper und dessen verwendung
DE102010013207B4 (de) * 2010-03-29 2013-09-05 Mt Aerospace Ag Verfahren zum Umformen von wenigstens einem im Wesentlichen ebenflächigen Rohling zu einem Schalenkörper und dessen Verwendung

Also Published As

Publication number Publication date
US20030006270A1 (en) 2003-01-09
FR2809033B1 (fr) 2002-08-09
WO2001089733A1 (fr) 2001-11-29
FR2809033A1 (fr) 2001-11-23
JP2003534133A (ja) 2003-11-18
US6629353B2 (en) 2003-10-07

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