臺灣博碩士論文加值系統

本文為以實驗之手法探討壓延前三層板未結合之壓著壓延時,板材於輥輪隙間之塑性變形及結合行為, 並有系統地探討了不同的壓下率、 內層板之初始板厚比、塑流應力比、初始板厚等壓延條件,對結合長度、出口板厚比、新生面生成率等之影響。 本文以鋁板、銅板及冷壓延用鋼板組成之三層板,執行複合板冷間壓延實驗。由一系列對結合長度、新生面生成率,平均面壓等分析, 得知結合長度隨壓下率的增加有先增加而後減少的趨勢,之後又有再次增加而後減少的傾向。且內層板之初始板厚比、 內層材之塑流應力比及初始板厚愈大則結合長度愈小等特性。

This paper investigates plastic deformation and bonding behavior ofsheets at the roll-gap in complex rolling of sandwich sheets unbonding beforerolling by experimental approaches. The effects of reduction, thickness ratio of inner layer and total thickness at the entrance, flow stress of the sheets,etc., upon the relative bonding length, thickness ratio at the exit, and newlygenerated surface ratio are discussed systematically. Sandwich sheets combined from aluminum, copper and cold steel sheetsare employed to carry out experiments of cold rolling of sandwich sheets.Through a series of analyses on relative bonding length, newly generated surface ratio, and mean contact pressure, it is known that the relativebonding length will increase first then decrease as the reduction increase,Further, at larger reductions, the same tendency occurs again. In addition,as the thickness ratio of the inner layer and the total thickness at theentrance, and flow stress of the inner layer increase, the relative bonding length decreases.