Experimental Study on Forming Process and Die Design in Press Forming : Forming of a Knob and a Flywheel

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  • プレス成形の加工プロセスと型設計に関する研究 : 回転ノブおよびフライホイールの成形加工
  • プレス セイケイ ノ カコウ プロセス ト カタ セッケイ ニ カンスル ケンキュウ カイテン ノブ オヨビ フライホイール ノ セイケイ カコウ

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Description

The flywheel, roller and knob can be formed directly from the cylindrical work-piece by cold axisymmetric upsetting with lateral extrusion. Lack of material filling was observed at the rim part of an extruded product, when an ordinal die was used. Then, the forming process and die was designed to achieve effective material flow to fulfill the lack portion of an extruded product. The product formed by the proposed forming process and die has the circular concave plane at the disk surface. When that concave plane is related to the base plane of an ornament plate in a knob and to the lightweight design of a product in a flywheel, the net shape forming can be achieved in the proposed forming process and die.

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