直机通过鉴定１９９３年３月，西安重型机械研究所设计、四川省山川机械厂应用的１８～６５ｍｍ高精度管材矫直机通过鉴定。该机采用１１辊对置与交错组合辊列和不等辊距布置形式，创造了一种新型的矫直机型。在设计中列入了斜轧穿孔辊形原理，提出了“漏矫”与“正负作用”观? Straight through the identification of March 1993, Xi’an Heavy Machinery Institute designed Sichuan Mountains Machinery Plant 18 ~ 65mm high-precision pipe straightening machine passed the identification. The machine uses 11 roller opposed and staggered combination of roller columns and ranging from the layout of the roller to create a new type of straightening machine. Included in the design of cross-rolling perforation roll principle, put forward the “leakage correction” and “positive and negative role” concept?