METHOD FOR MANUFACTURING LIGHT ALLOY-MADE THIN THICKNESS FORMING BODY AND LIGHT ALLOY-MADE THIN THICKNESS FORMING BODY

摘要

PROBLEM TO BE SOLVED: To obtain a defect-free forming body in the convexity and its back side of a light alloy-made thin thickness forming body having a thicker projection than the platy section formed on the platy section composed of light alloy. SOLUTION: In the manufacturing method for the light alloy-made thin thickness forming body to shape the thicker convexity 2 than the platy section formed through the forming in the platy section of a forming stock material, the volume of the projection forming section of the forming stock material 3 is made 1.1 to 1.7 times against the volume of the convexity 2 of the thin thickness forming body.