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AssigneesMcDonnell Douglas Corporation, Crismb-Cat
InventorsValery Vitalievich Vasiliev, Vladimir Alexandrovich Bunakov, Alexandr Fredeorovich Razin, Mikhail Sergeevich Artjukhov
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The inventions relate to the field of machine manufacturing and more specifically, to shell-type construction of base members used in aviation engineering and rocketry, which operate under conditions of combined stressed state, to the methods of and mandrels for their manufacture. A load-carrying tube-shell comprises a cellular framework 1 made of spiral and annular strips 4, 5 crossing each other to define layers 3 of systems repeated over the thickness of the wall thereof so that stiffening ribs 6, 7 with criss-crosses 8, 9, 10 are thus formed, and outer coating layers 2 respectively made of unidirectional filaments 11 bound by a cured polymeric binder 12. Damping-absorbing layers 14 of resilient-elastic material such as rubber or polyurethane are disposed between the layers 3. A method of the manufacture of the tube-shell comprises a step of introducing intermediate continuous forming strips 20 placed beneath the layers 4, 5 laid down under tension. The disclosed mandrel comprises intermediate forming strips 20 of resilient-elastic material doubled with the strips 4, 5 disposed in mutually crossing slots 17, 18, 19.
A load-carrying tube shell in the form of a body of revolution made of composite materials and comprising:
A method of the manufacture of a load-carrying tube-shell, comprising the steps of coating a core with a rubber-like material having mutually crossing slots, laying spiral and annular crossing strips of unidirectional filaments impregnated with a polymeric binder down into the slots to form a framework of cellular structure, applying forming elements thereto, and heat-treating thereof followed by removing the core and the rubber-like coating, characterized in that intermediate forming elements in the form of continuous strips of resilient-elastic material are introduced between the layers of systems defined by the spiral and annular crossing strips when laying them down along predetermined directions, said continuous strips being placed beneath the strips of unidirectional filaments thus laid down, and further including the step of covering the framework with outer forming elements made in the form of filaments disposed at an angle of 80.degree. to 90.degree. with respect to the axis of symmetry of the core.
A mandrel for making a load-carrying tube-shell, comprising a core and a rubber-like material coating the core and having mutually crossing spiral and annular slots and transitional slots extending between adjacent annular slots, and further comprising spiral and annular crossing strips and transitional strips extending between the annular strips disposed in the spiral, annular and transitional slots, respectively, with intermediate continuous forming strips of resilient-elastic material doubled with the spiral and annular and transitional strips.
A tube-shell for connecting base members of a lying vehicle, comprising:
A method of the manufacture of a tube-shell for connecting base members of a flying vehicle, comprising the following steps:
A mandrel for the manufacture of a tube-shell for connecting base members of a flying vehicle, comprising:
Dependencies are inferred from the claim text.