軽金属薄板へのボス成形における<br>ひけの発生特性と抑止策

DOI Web Site 被引用文献6件 参考文献6件

書誌事項

タイトル別名
  • Method for Preventing Dimple Defects<br>on Light Sheet Metal in Boss Forming
  • ケイキンゾク ウスイタ エノ ボス セイケイ ニ オケル ヒゲ ノ ハッセイ トクセイ ト ヨクシサク

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抄録

Press forging is a method for forming bosses by extruding a thin sheet metal into small holes of a die. Bosses formed on cases made of a light sheet metal make it possible to decrease the weight of mobile devices, for example, mini-disc players and digital cameras. However, when the material is too thin, dimple defects often appear on the reverse surface of the boss, which becomes the design surface, shortly after the beginning of the forming process. In this study, we investigate the deformation properties of bosses and dimples by experimental observations and finite element analysis, and methods for preventing dimple generation are described. When a boss is formed with a diameter of 5 mm on a sheet metal with a thickness of 1.2 mm, the maximum boss height without dimple defects is improved from 0 to 2.5 mm.

収録刊行物

  • 塑性と加工

    塑性と加工 48 (555), 293-297, 2007

    一般社団法人 日本塑性加工学会

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