The stainless steel seamless steel pipe series products are widely used in fields such as petrochemical, marine engineering, aviation and aerospace due to their advantages of corrosion resistance, high temperature resistance, and high pressure resistance.
According to statistics, the market for cold rolled tube mills has a total of over 6000 units, but they are generally in a state of low production efficiency, slow rolling speed, and low product accuracy. With the increasing requirements of market orientation and application scenarios for product specifications (increasing diameter to wall ratio), product accuracy (roundness, straightness, surface finish), and product performance (nickel based alloys, duplex stainless steel, etc.), the requirements for the capabilities and functions of traditional equipment are also becoming higher and higher, moving towards extreme, high-speed, intelligent, high-precision, multifunctional and other aspects, thus promoting the rapid development of equipment, Furthermore, higher requirements have been put forward for the structural design, equipment level, and manufacturing accuracy of the periodic cold rolling pipe mill.
Cold rolling pipe mills will develop towards extreme, high-speed, intelligent, high-precision, and multifunctional aspects.
1、Extreme equipment capabilities
Φ Large diameter thick wall with a diameter of 550mm and above Φ The demand for small diameter thin-walled stainless steel seamless pipes below 5mm is gradually increasing, and there is still a supply-demand contradiction in the products. Some products rely on imports, and the fundamental reason is the lack of equipment capacity for the production of extreme products mentioned above in China. Further expand the specifications of cold-rolled seamless pipe products and achieve the goal of rolling out finished pipes Φ Products with a small size of 3mm.
2、High speed rolling mill
Improving the rolling speed of the cold rolling mill is the most direct measure to increase its output. However, increasing the rolling speed of the cold rolling mill will result in greater inertia force and moment of inertia in the moving part of the rolling mill. Since the emergence of the first high-speed cold rolling mill, the reduction and balance of inertia force and moment of inertia is also an important research content in the development process of the cold rolling mill. Many high-speed cold rolling pipe mills developed by enterprises now use a dual sector block balance mechanism.
3、Intelligent rolling mill equipment
With the shortage of professional talents and the market pushing down product prices, enterprises hope to use fewer workers to complete the entire rolling process, requiring a shift in traditional production models. This requires equipment with intelligent production functions, which requires the improvement and improvement of equipment, electrical systems, and hydraulic lubrication systems in the rolling mill area to meet the requirements of intelligent production and facilitate the realization of unmanned rolling.
4、High precision rolling mill equipment
During the rolling process, the frame is the main part that bears the rolling force and needs to have extremely high stiffness. The moving frame drives the rolling rollers to move back and forth, and the vertical rolling component is borne by the fixed casing. This not only ensures the system's stiffness, but also reduces the total weight of the moving part, reducing the generation of some motion inertia, and reducing the working load of the motor.
5、Rolling mill equipment multifunctional
The three roll Pilger mill, which combines the advantages of large rolling deformation of two roll mills and high precision of three roll mills, can achieve the effect of a two roll mill+three roll mill with just one mill, achieving a multi-purpose effect.
6、Stable rolling mill transmission system
A planetary gear reducer capable of achieving high-speed and smooth linear reciprocating motion. The electric motor is input to the small gear and transmitted to the gear drum through the small gear. The gear drum and its internal planetary gears work together to transform rotary motion into reciprocating linear motion. At the same time, add a balance block, which plays a role in balancing inertial force and moment of inertia.
