Manufacture of flanged cylindrical member

Abstract

Abstract PURPOSE:To improve the strength of a boundary part, and to reduce the cost by forming a cylindrical part and a pair of rise parts on one surface of a plate material and the other surface, respectively, by means of an extrusion working. CONSTITUTION:A square-shaped material to be worked 10 is brought to a composite extrusion working, a boss part 12 is formed on one plate surface 10a, and also a pair of rise parts 13, 13 are formed simultaneously on the other plate surface 10b. Subsequently, a pair of rise parts 13 are pushed and bent in a direction for being separated from each other, and a flange part 19 is roughly formed. Also, the flattened rise part 13 and the plate surface are straightened by a press, and the flange part 19 of one plate is formed. Subsequently, a small recessed part 14 and a recessed part 15 of a boss part 11 are penetrated, and also an external forming of a serration 17, a fitting hole 18 and the flange part 19 is executed. According to this method, the strength of a boundary part of the flange part 19 and the boss part 12 is improved, and also the cost is reduced.

Inventors

• 👤 Ichiro Hattori
• 👤 一郎 服部
• 👤 Shinji Ozeki
• 👤 尾関　眞治

Bibliographic Details