塑性と加工
Online ISSN : 1882-0166
Print ISSN : 0038-1586
ISSN-L : 0038-1586
論文
エアハンマー鍛造における実働荷重と型面圧の測定
米山 猛三吉 宏治楯 智樹
著者情報
ジャーナル 認証あり

2019 年 60 巻 707 号 p. 352-358

詳細
抄録

The actual punch load, contact pressure, and frictional stress on the punch surface has been measured in air-stamp hammer forging. An example of stamping where the punch is inserted into the center of a circular cylinder in a circular die with flash land has been chosen for the detection of contact stress on the punch. The punch load was detected by fitting strain gauges on the side wall of the inner hole machined on the bottom surface of the punch. Pressure and friction sensors were installed on the top flat surface of the punch, the corner of the punch, and the flash land surface. In the stamping process where the work material is only pressed by the punch top, the pressure on the punch was nearly equal to the punch load divided by the top area of the punch. When the compressed bulged material came into contact with the outer side surface and the deformed material came into contact with the bottom of the punch, the friction on the corner of the punch increased. The punch load increased rapidly when the material filled the die cavity. The pressure and friction applied on the flash land surface increased as the flash thickness and temperature decreased with the progress of stamping.

著者関連情報
© 2019 一般社団法人 日本塑性加工学会
前の記事
feedback
Top