Steel pipe precision rolling mill: the core equipment for precision pipe forming

Steel pipe precision rolling mill: the core equipment for precision pipe forming

The precision rolling mill is the core equipment for steel pipe production and the key unit for seamless steel pipe precision machining in our factory. Multiple units work together to ensure the dimensional accuracy, surface quality, and mechanical performance of steel pipes meet the standards. It is the core equipment for high-end pipe forming.

The overall volume of the equipment is thick and solid, suitable for industrial scale production needs. Our mainstream three roll precision rolling mill has a moderate floor space, a thick and stable frame, and a single equipment weight of tens of tons. The frame structure is compact and equipped with supporting systems such as variable frequency drive and core rod control. The overall rigidity is extremely strong, and it can adapt to high-precision rolling operations of steel pipes with different diameters, with excellent operational stability.

The equipment is made of industrial high-strength wear-resistant steel, and the core load-bearing frame is made of cast steel, which has outstanding compressive and impact resistance and can withstand high-pressure rolling loads for a long time. The core rolling mill, core rod and other key components that are prone to wear are made of high alloy heat-resistant and wear-resistant steel. After quenching and tempering hardening treatment, they have high hardness, strong wear resistance, and high temperature deformation resistance, effectively extending the service life of the equipment, ensuring the accuracy stability of long-term continuous production, and reducing equipment wear and tear.

The precision rolling mill operates based on the principle of limited motion core rod rolling, with three rolling rolls symmetrically distributed in a 120 ° ring shape, forming a closed rolling pass with the internal core rod. By using a hydraulic compression system to accurately control the roll gap, the heated raw pipe is uniformly squeezed and extended, gradually reducing diameter and wall shaping, correcting dimensional deviations caused by previous rolling, optimizing the internal structure of the pipe, and eliminating problems such as uneven wall thickness and rough inner walls.

The standardized operation steps are clear and efficient: firstly, descaling and preheating pretreatment are carried out on the waste pipes to remove surface oxide skin; Subsequently, the lubricated core rod is inserted into the blank tube and sent to the rolling station of the rolling mill; By driving the rolling mill synchronously with a variable frequency motor, the plastic deformation of the pipe is completed at a constant speed; After rolling is completed, the core rod is removed, and then subjected to micro tension sizing, cooling and straightening. Finally, non-destructive testing, dimensional inspection, and cutting head sizing are completed to produce qualified finished products.

The finished steel pipes processed by precision rolling mills have excellent quality, with uniform wall thickness, precise roundness, smooth inner and outer walls without burrs or cracks. The finished products cover multiple categories such as high-pressure boiler tubes, fluid transport tubes, oil and gas casings, structural steel pipes, etc., with stable mechanical properties, pressure resistance, corrosion resistance, and toughness standards. They are widely used in energy, chemical, mechanical manufacturing, and other fields, meeting various high-end working conditions with high-precision and high stability quality.