段曲げ加工部品の変形挙動 : 第1報,板の見かけの伸び

概要

論文の詳細を見る
Offset bending techniques are widely used in the field of sheet bending processes. The deformation behaviors of offset bending have not been experimentally or theoretically investigated. This paper deals with the change of sheet length (apparent elongation) which consists of the pure stretch of the sheet and feigned contraction by the loose fit of the bent sheet in molding dies. The experiments show that the apparent elongations have minus values in case of thin sheets or deviations form inclined lines in case of thick sheets. The explanations of these results are as follows : The pure stretch may linearly increase with sheet thickness. The loose fit in dies depends on the die configuration and flexural rigidity of the materials. These factors are mutually affected but can be evaluated by the elementary calculations reducing in order of sheet thickness. It is noted that the slip of the sheet form the clamped part is not ignored.
一般社団法人日本機械学会の論文
1986-09-25