由於非對稱壓延可有效降低壓延力及壓延扭矩， 使材料於 壓延製程上， 更趨自由性與多樣性， 在壓延工業之應用上， 具 有極大之助益； 但非對稱壓延之板材易產生彎曲現象而造成產 品品質降低及設備損壞， 因此， 本文以實驗的方法， 尋找曲率 之臨界值。 本文主要是利用實驗探討試片經非對稱壓延加工後， 其試 片的輥輪壓延力、壓延扭矩及彎曲曲率分別於不同縮減率時的 變化情形。實驗條件以異徑異周速為主， 包含輥輪與壓延試片 間的界面摩擦及上下輥輪的直徑不同等。 藉由本實驗所規劃的加工條件， 可得知壓延後之試片曲率 受上下輥輪直徑的不同、縮減率大小的不同、圓周切線速度不 同步及界面摩擦等條件的影響， 試圖找出曲率值介於± 0.0025(1/mm)內的臨界縮減率（ 即壓延後的成形試片呈現接近 平坦的狀態）產生的條件。藉以達到曲率控制，減少壓延道次， 以期達到加工能量需求較低之經濟性製程。 Due to the asymmetrical rolling can reduce rolling force and rolling torque that will make rolling process also flexible and variable. There are extreme advantages in application of rolling industry. The specimens will curvature after the asymmetrical rolling, the flat bending will reduce production quality and impact machine, for this reason, this paper use experiment to find out the critical point of curvature. This paper discusses rolling force, rolling torque and curvature ratio with different reduction at asymmetrical rolling. The experimental conditions include different flat thickness and interface between rolling and specimens by lubrication or dry friction. By experimental conditions can find out specimens that become curvature turn up or turn down behavior with different reduction, different rolling speed, interface friction and different flat thickness after rolling process. Try to find out the critical reduction that curvature between ±0.0025(1/mm), i.e. curvature is near zero. For the purpose of control the curvature and decrease rolling pass times that can reach lower economical production process.
