High-precision cold drawn precision steel project profile is a new high-tech energy-saving products. In recent years, the use of the term technology to produce precision steel has been widely used in domestic hydraulic, pneumatic cylinders, coal mine support (pillar), oil tubing, jack and other manufacturing. High-precision cold drawn precision steel promote the use of steel to save and improve processing efficiency, save energy, reduce the hydraulic cylinder, cylinder machining equipment investment is important. The technology adopted in November 1991 the Ministry of Metallurgy, Anhui Science and Technology Commission of experts, in December 1992 by Jiangsu Science and Technology Commission of experts. The technology is included in the State Science and Technology (93) made into a National Science No. 500 issued by the word “national key scientific and technological achievements Programme” project guide, number I4-1-4-21.
Second, the characteristics of the so-called high-precision cold drawn tube product is, the diameter dimensional accuracy (tolerance) strictly, both inside and outside surface finish,