Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Patent
1973-05-04
1976-02-10
Lanham, C. W.
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
291568H, 228181, 228189, 228193, 416232, B23P 1504, B23K 3100
Patent
active
039369200
ABSTRACT:
The present invention is a lightweight, internally stiffened aerodynamic shell structure with local fittings and a method for fabricating the same. Two typical type structures are the blades and vanes of a turbo fan engine. The invented structure exhibits heretofore unattainable strength and stiffness to weight ratios and a high degree of structural integrity. It is, therefore, particularly advantageous in applications such as the rotating blades in airborne or ground power conversion equipment. It is an aerodynamically shaped structure comprising metallic stiffening material interposed between, and joined to, a pair of relatively thin corresponding metallic face sheets which form the shell skin of the structure. As a function of design requirements, a root fitting, shroud fitting, and tip rib or fitting are solid-state diffusion bonded to the shell structure. In addition, the leading and trailing edges of the shell structure are formed by the solid-state diffusion bonding of the edges of the corresponding face sheets. The invented method for diffusion bonding the shell structure to the required fittings and the edges of the face sheets to form the leading and trailing edges achieves a homogeneous joint having parent material strength and properties while achieving a high degree of filleting in multiple directions. The invented method for fabricating the invented aerodynamic shell structure includes the use of (i) flow volumes of excess material located on the parts to be joined, the respective geometry and location of such flow volumes being determined as a function of the geometry of the parts and the juncture to be achieved, as well as the required filleting, and (ii) a specially designed die assembly which applies high localized pressure at an elevated temperature for a suitable period of time to achieve the desired plastic flow diffusion bond. Typical metals used to construct the invented shell structure are the wrought alloys such as titanium, aluminum, stainless steel, nickel base alloys, cobalt base alloys and columbium base alloys, etc. The invention also contemplates many variations of the internal stiffening material used to achieve the required shear and bending stiffness, and the placement of such material.
REFERENCES:
patent: 2947078 (1960-08-01), Pflumm et al.
patent: 3070880 (1963-01-01), Davis et al.
patent: 3158732 (1964-11-01), Kazakov
patent: 3170234 (1965-02-01), Tarr
patent: 3186083 (1965-06-01), Wright
patent: 3245143 (1966-04-01), Chopinet et al.
patent: 3427706 (1969-02-01), Jaffee
patent: 3628226 (1971-12-01), Nelson
patent: 3649425 (1972-03-01), Alexander
patent: 3736638 (1973-06-01), Stone
Smallen, H. et al., Welding Journal, Corrugated-Sandwich Structure, Apr. 1960, pp. 314-321.
Crane Dan C.
Lanham C. W.
TRE Corporation
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