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High-precision Cold Drawing Precision Tube Production Characteristics
Jun 14, 2018

(1) High production efficiency: It takes 154 hours to produce a cylinder with an inner diameter of 420 mm and a length of 12 meters using the traditional method, and it takes only 4 minutes to produce with a cold drawing method.

(2) High quality rate: Since the rolling head of the boring hole also serves as a guide, during the cutting process, the rough tube is subject to deflection due to its own weight, causing the rolling head and the boring knife to go off, resulting in waste products. The authenticity rate can only reach about 60%, and it can be produced by cold drawing method. The authenticity rate can reach more than 95%.

(3) High metal utilization rate: The cylinder body is manufactured by the traditional boring method, and the metal utilization rate is only 50-70%. When produced by the drawing method, the metal is not only cut into iron powder, but can be extended by 30%, and the metal utilization rate can reach 95%.

(4) It can improve the mechanical properties of the finished tube metal: It is produced by the drawing method, so that the blank is plastically deformed by more than 30%, and the strength of the metal of the finished tube is greatly increased due to the work hardening. In general, the strength limit of the inner layer of the finished tube is increased by 60%. High-precision cold-drawn tubes are made of seamless hot-rolled steel tubes and straight-welded tubes. After chemical treatment, they are drawn on special cold-drawing machines and designed by special deformation principles to produce high-precision tubes. The dimensional accuracy of H10 ~ H8, straightness of 0.35 ~ 0.5mm/m, surface roughness Ra1.6-0.4