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1. (WO1997027045) METAL SANDWICH STRUCTURE WITH INTEGRAL HARDPOINT
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/1997/027045 International Application No.: PCT/US1996/020115
Publication Date: 31.07.1997 International Filing Date: 20.12.1996
Chapter 2 Demand Filed: 12.08.1997
IPC:
B21D 26/02 (2006.01) ,B21D 47/00 (2006.01) ,B23K 26/02 (2006.01) ,B23K 26/20 (2006.01) ,B23K 26/24 (2006.01) ,B23K 26/28 (2006.01) ,B23K 26/38 (2006.01) ,B64C 1/00 (2006.01)
B PERFORMING OPERATIONS; TRANSPORTING
21
MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
D
WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING
26
Shaping without cutting otherwise than by using rigid devices or tools or yieldable or resilient pads, e.g. shaping by applying fluid pressure or magnetic forces
02
by applying fluid pressure
B PERFORMING OPERATIONS; TRANSPORTING
21
MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
D
WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING
47
Making rigid structural elements or units, e.g. honeycomb structures
B PERFORMING OPERATIONS; TRANSPORTING
23
MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
K
SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
26
Working by laser beam, e.g. welding, cutting, boring
02
Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
B PERFORMING OPERATIONS; TRANSPORTING
23
MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
K
SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
26
Working by laser beam, e.g. welding, cutting, boring
20
Bonding, e.g. welding
B PERFORMING OPERATIONS; TRANSPORTING
23
MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
K
SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
26
Working by laser beam, e.g. welding, cutting, boring
20
Bonding, e.g. welding
24
Seam welding
B PERFORMING OPERATIONS; TRANSPORTING
23
MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
K
SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
26
Working by laser beam, e.g. welding, cutting, boring
20
Bonding, e.g. welding
24
Seam welding
28
of curved planar seams
B PERFORMING OPERATIONS; TRANSPORTING
23
MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
K
SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
26
Working by laser beam, e.g. welding, cutting, boring
36
Removing material
38
by boring or cutting
B PERFORMING OPERATIONS; TRANSPORTING
64
AIRCRAFT; AVIATION; COSMONAUTICS
C
AEROPLANES; HELICOPTERS
1
Fuselages; Constructional features common to fuselages, wings, stabilising surfaces, or the like
Applicants:
BULDHAUPT, Frederick, W. [US/US]; US (UsOnly)
FISCHER, John, R. [US/US]; US (UsOnly)
KISTNER, Matthew, G. [US/US]; US (UsOnly)
WILL, Jeffrey, D. [US/US]; US (UsOnly)
THE BOEING COMPANY [US/US]; P.O. Box 3707 M.S. 13-08 Seattle, WA 98124-2207, US (AllExceptUS)
Inventors:
BULDHAUPT, Frederick, W.; US
FISCHER, John, R.; US
KISTNER, Matthew, G.; US
WILL, Jeffrey, D.; US
Agent:
NEARY, J., Michael; 542 S.W. 298th Street Federal Way, WA 98023, US
Priority Data:
60/010,03312.01.1996US
Title (EN) METAL SANDWICH STRUCTURE WITH INTEGRAL HARDPOINT
(FR) STRUCTURE METALLIQUE DE TYPE SANDWICH A POINT D'ATTACHE INTEGRAL
Abstract:
(EN) A superplastically formed, diffusion bonded sandwich structure (30) having integral metal hardpoints (40), made by joining two superplastic metal core sheets (36) together into a core pack (38) by welding or diffusion bonding along a pattern of lines which form junction lines between the core sheets (36) when the pack (38) and metal inserts (40) are interposed between the face sheets (32, 34) and the core (38). All of the sheets in the pack (30) are sealed together around an outside peripheral edge to create a gas tight envelope. The pack (30) is heated to superplastic temperatures in a cavity of a die, and the top and bottom face sheets (32, 34) are diffusion bonded to top and bottom surfaces of the metal inserts (40) by application of heat and pressure from top and bottom inner surfaces of the die cavity. While at superplastic temperatures, the pack (30) is inflated by gas pressure against inside surfaces of a die to form an expanded metal sandwich structure (30) having integral webs (36) and having integral hardpoints (40) formed by the metal inserts (40). After forming, the gas pressure is reduced to near atmospheric, the die is opened and the part (30) is removed from the die.
(FR) Cette invention concerne un structure métallique de type sandwich soudée par diffusion et formée de manière superplastique, laquelle structure possède des points d'attache métalliques intégraux. Cette structure est obtenue par l'assemblage de deux tôles métalliques centrales superplastiques en un bloc superplastique central. Cet assemblage est réalisé en effectuant une soudure à l'arc ou par diffusion le long d'un diagramme de lignes définissant des lignes de jonction entre les tôles centrales lorsque le bloc est gonflé par une pression de gaz donnée et se trouve à des températures superplastiques. Des tôles extérieures sont disposé es sur et sous le bloc central, tandis que des inserts métalliques sont disposés entre les tôles extérieures et la partie centrale. Toutes les tôles du bloc sont scellées entre elles le long d'un bord périphérique externe de manière à créer une enveloppe étanche aux gaz. Le bloc est ensuite chauffé à des températures superplastiques dans la cavité d'une matrice, tandis que les tôles extérieures supérieure et inférieure sont soudées par diffusion aux surfaces supérieure et inférieure de l'insert métallique, ceci en générant de la chaleur et en exerçant une pression depuis les surfaces internes supérieure et inférieure de la cavité de la matrice. Pendant qu'il se trouve à des températures superplastiques, le bloc est gonflé par une pression de gaz de manière à être pressé contre les surfaces internes de la matrice, et à former ainsi une structure de type sandwich, métallique et expansée comportant des âmes intégrales ainsi que des points d'attache intégraux formés par l'insert métallique. Après la mise en forme, la pression de gaz diminue de manière à se rapprocher de la pression atmosphérique, ceci avant d'ouvrir la matrice et d'en retirer la pièce.
Designated States: US
European Patent Office (EPO) (AT, BE, CH, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
Publication Language: English (EN)
Filing Language: English (EN)