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US 6,199,419 B1Granted
Method for manufacturing a dome from an undersized blank
OwnerEmmanuil Shrayer, Richard J. Morgantiinventors
Life of this patent
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Abstract
Disclosed is a method of forming a dome from a substantially round blank having a surface area smaller than the surface area of the dome. The method includes the steps of shear forming the blank to form a deformed blank, spin stretching the deformed blank in selected areas along its circumference to form a stretched blank, inside spinning the stretched blank into a rough dome, final dome spinning the rough dome into the finished dome, and flange spinning the dome.
Claims17
A method of forming a dome from a substantially round blank wherein a surface area requirement of said dome is greater than a surface area of said blank, said method comprising the steps of:
- shear forming said blank, said shear forming step comprising the steps of;
- coaxially securing an inside surface of the blank to a rotatable flat-nosed conical mandrel;
- rotating said blank on said flat-nosed conical mandrel;
- heating a predetermined portion of said blank;
- and
- applying a force to an outer surface of said blank such that said blank is shear formed in a shape of said flat-nosed conical mandrel to form a deformed blank;
- additional shear forming said deformed blank in predetermined locations such that a thickness of said blank in said predetermined locations is reduced to form a stretched blank;
- removing said stretched blank from said mandrel;
- inside spinning said stretched blank to form a dome shaped blank, said inside spinning step comprising the steps of;
- coaxially securing an outside surface of said stretched blank within a rotatable concave dome mandrel;
- rotating said stretched blank on said concave dome mandrel;
- heating a predetermined portion of said stretched blank;
- and
- applying a force to an inner surface of said stretched blank such that said stretched blank is deformed to form said dome shaped blank;
- removing said dome shaped blank from said concave dome mandrel;
- final dome spinning said dome shaped blank into said dome, said final dome spinning step comprising the steps of;
- coaxially securing an inside surface of said dome shaped blank to a rotatable convex dome mandrel;
- rotating said dome shaped blank on said convex dome mandrel;
- heating a predetermined portion of said dome shaped blank;
- and
- applying a force to said outside surface of said dome shaped blank such that said dome shaped blank is deformed in a shape of said convex dome mandrel to form said dome;
- and
- flange spinning said dome, said flange spinning step comprising the steps of:
- rotating said dome shaped blank on said convex dome mandrel;
- heating a flange portion of said dome shaped blank;
- and
- applying a force to a surface of said range portion such that said flange portion is deformed such that a thickness of said flange is increased and such that a length of said flange is decreased.
24 more elements
A method of forming a dome from a substantially round blank wherein a surface area requirement of said dome is greater than the surface area of said blank, said method comprising the steps of:
- shear forming said blank, said shear forming step comprising the steps of;
- coaxially securing an inside surface of the blank to a rotatable flat-nosed conical mandrel;
- rotating said blank on said flat-nosed conical mandrel;
- heating a predetermined portion of said blank;
- and
- applying a force to an outer surface of said blank such that said blank is shear formed in a shape of said flat-nosed conical mandrel to form a deformed blank;
- additional shear forming said deformed blank in predetermined locations such that a thickness of said deformed blank in said predetermined locations is reduced to form a stretched blank;
- removing said stretched blank from said mandrel;
- inside spinning said stretched blank to form a dome shaped blank, said inside spinning step comprising the steps of;
- coaxially securing an outside surface of said stretched blank within a rotatable concave dome mandrel;
- rotating said stretched blank on said concave dome mandrel;
- heating a predetermined portion of said stretched blank;
- applying a force to an inner surface of said stretched blank such that said stretched blank is deformed to form said dome shaped blank;
- removing said dome shaped blank from said concave dome mandrel;
- solution heat treating said dome shaped blank;
- and
- final dome spinning said dome shaped blank into said dome, said finish spinning step comprising the steps of;
- coaxially securing the inside surface of said dome shaped blank to a rotatable convex dome mandrel;
- rotating said dome shaped blank on said convex dome mandrel;
- and
- applying a force to said outside surface of said dome shaped blank such that said dome shaped blank is deformed in a shape of said convex dome mandrel to form said dome;
- and
- flange spinning said dome, said flange spinning step comprising the steps of:
- rotating said dome shaped blank on said convex dome mandrel;
- heating a flange portion of said dome shaped blank;
- and
- applying a force to a surface of said flange portion such that said flange portion is deformed such that a thickness of said flange is increased and such that a length of said flange is decreased.
24 more elements
Dependencies are inferred from the claim text.