Patent ID: 9333550
Filing Date: 2016-05-10
CPC Classification: B21D,B64C,B64F

Claim Text:
1. Method for producing a wing panel having a rib, comprising: forming the rib such that a width-extended part extending along an inner surface of the wing panel and a web part rising from the width-expanded part in a direction perpendicular to the inner surface of the wing panel are formed integrally; peen-forming the wing panel by projecting metal shots to a tip end portion of the web part so as to deform the wing panel curvedly so that the inner surface is convex in a span-wise direction of the wing panel, and forming a neutral axis position on the rib in a cord-wise direction of the wing such that the neutral axis is located below a central axis of the rib, on the wing panel side of the rib.