The Stress Concentration Produced in a Die During the Cold-Forging Process

スポンサーリンク

概要

• 論文の詳細を見る

• The lateral fracture in a cold-forging die appears to be caused by the stress concentration at the internal corner fillet of the die. An investigation on the stress concentration factor for an axisymmetrical die with a circular arc fillet and with or without an ejector hole is reported. A theoretical analysis is carried out two-dimensionally by assuming a mirror pattern of the vertical section of the die. The value of the stress concentration is calculated on the case of the die without an ejector hole loaded by a uniformly distributed internal pressure and with an ejector hole applied by a partially distributed load substituting for the effect of the ejector hole. The validity of the analysis is comfirmed by the experimental results using the three-dimensional photoelasticity. The value of the stress concentration factor depends largely on the diameter of the ejector hole as well as the fillet radius.

• 一般社団法人日本機械学会の論文

著者

• Fujii Taichi

  Professor Osaka City University

• Azuma Tsuneo

  Instructor Osaka City University

• HIRAI Tsuneo

  Professor, Doshisha University

• TSUKUMA Shin

  Director, Kamitsu-Sekisakusho Ltd.

• Tsukuma Shin

  Director Kamitsu-sekisakusho Ltd.

• Hirai Tsuneo

  Professor Doshisha University

関連論文

• The Stress Concentration Produced in a Die During the Cold-Forging Process

スポンサーリンク