リング圧縮試験による冷間鍛造における非定常摩擦条件の評価

概要

論文の詳細を見る
In order to estimate the varying friction coefficients during the ring compression test, we have proposed new calibration curves which describe relative effect of friction on the extension velocity of ring diameter. Commercial pure aluminum specimens with several different surface appearances, which were made by various finishing methods, were tested, with paraffin oils as a lubricant. The change in the outer diameter of the testpiece was continuously meassured by means of clip gauge during compression. Transient friction coefficients in the stage while lubricant is trapped have been obtained clearly according to the proposed method. It is found that the new calibration curves are more effective than the commonly used calibration curves, particularly in small reductions.
一般社団法人日本機械学会の論文
1989-08-25