The Factors Affecting the Straightness of Seamless Steel Tube

The straightness of seamless steel tubes has a significant impact on pipes used in precision machinery and hydraulic cylinders. High straightness accuracy can enhance the efficiency of post-processing for customers and reduce production costs. What are the factors that affect the straightness of seamless tubes? 

1. Outdated straightening equipment

The outdated straightening equipment, resulting in poor straightening accuracy. The straightness of seamless steel tubes after being discharged from the furnace has not significantly improved, and only visual inspection can ensure no bending. For the precision processing industry, the straightness requirements of such seamless steel tubes cannot be met, for example, for hydraulic cylinders, which have high requirements for the straightness of steel tubes and need to ensure the consistency of the inner hole. However, outdated straightening equipment is far from meeting this requirement. Xiangjia Steel possesses advanced straightening equipment that can control the straightness accuracy of seamless steel tubes at 0.5mm/m, meeting the production requirements of hydraulic cylinders.

2. The production process of seamless steel tubes

Two processes are adopted in the production of seamless steel tubes, namely precision rolling and cold drawing. Generally, the straightness of seamless steel tubes after precision rolling is better than that after cold drawing because precision rolling is a rolling process and does not impose too much elastic force on the seamless steel tubes. However, during the cold drawing process, the seamless steel tube is in a stretched state and has greater elastic force. When the seamless steel tube leaves the drawing machine, plastic deformation may occur.

The above are the solutions to the question of what are the factors affecting the straightness of seamless steel tubes. Straightness is an important indicator for tubes with precise purposes. The better the straightness, the higher the yield rate during post-processing.