我厂318、216周期式轧管机使用的轧辊都是由匈牙利进口的专用轧辊仿型车床加工成型。周期式(亦称皮尔格)仿型靠模原是随同轧辊车床一起进口的,每付价值人民币2万余元。原进口靠模已使用多年,周期曲线模面磨损和拉伤严重,经一再修磨恢复使用,使仿型模面精度已损失,几何形状也有较大的改变。用这种不合格仿型靠模所加工的轧辊在轧制钢管 I plant 318,216 rolling mill cycle are used by the Hung-imported special-shaped roller molding machine processing molding. Periodic (also known as Pilger) imitation by the original model is imported along with the roll lathe, each worth 2 million yuan. The original import by the mold has been used for many years, the cycle curve of serious wear and tear on the curve, after repeated grinding to restore use, so that the profile accuracy has been lost, the geometry has a greater change. With this unqualified imitation model by the processing of the roller rolling steel pipe