Patent ID: 6681612
Filing Date: 2004-01-27
Classification: A63B

Abstract:
A method of manufacturing a curved metal plate comprising:preparing a first die segment having a convex surface formed thereon, in which said convex surface is formed with a linear apex and is curved in a direction around an axis parallel to the linear apex, and said convex surface has at least one recess that has at least a portion orthogonal to the direction along which the convex surface is curved, in which said direction orthogonal to the direction along which said convex surface is curved represents a direction orthogonal to both tangential and normal lines of the outline of the convex surface in a cross-sectional view taken along an imaginary surface that is orthogonal to said axis; preparing a second die segment having a concave surface formed thereon corresponding in shape to said convex surface; and pressing a metal plate made of a plate material selected from titanium or titanium alloy with said first and second die segments, with a first side of said metal plate held in contact with said convex surface of the first die segment, thereby curving said metal plate while forming at least one rib on the first side of the metal plate through said at least one recess of said convex surface.