Stainless steel seamless steel pipe series products are widely used in petrochemical, marine engineering, aerospace and other fields due to their advantages of corrosion resistance, high temperature resistance and high pressure resistance. According to statistics, there are more than 6,000 sets of cold rolling mills in the market, but they are basically in the status quo of low production efficiency, slow rolling speed and low product accuracy.

With the market orientation and application scenarios, the requirements for product specifications (increase in diameter and wall ratio), product accuracy (roundness, straightness, surface finish) and product performance (nickel-based alloys, duplex stainless steel, etc.)The capabilities and functional requirements of traditional equipment are also getting higher and higher, and it is developing towards extreme, high-speed, intelligent, high-precision, multi-functional and other aspects.As a result, the rapid development of equipment has been promoted, and higher requirements have been placed on the structural design, equipment level and manufacturing accuracy of the periodic cold rolling mill. The cold rolling mill will develop towards extreme, high-speed, intelligent, high-precision and multi-functional.

1. Extreme equipment capabilities

The demand for large-diameter thick-walled stainless steel pipes above Φ550mm and small-diameter thin-walled stainless steel seamless pipes below Φ5mm is gradually increasing. There is still a contradiction between supply and demand for products. Some products rely on imports. Further expand the product specifications of cold-rolled seamless pipes and rolled finished pipes to reach products as small as Φ3mm.

2. High-speed rolling mill

Increasing the rolling speed of the cold rolling mill is the most direct measure to increase its output, but increasing the rolling speed of the cold rolling mill will cause the moving parts of the rolling mill to generate greater inertial force and moment of inertia.Since the appearance of the first high-speed cold rolling mill, the reduction and balance of inertial force and moment of inertia is also one of the important research contents in the development of cold rolling mills. At present, the high-speed cold rolling mill developed by many enterprises adopts the double sector block balancing mechanism.

3. Intelligent rolling mill equipment

With the shortage of professional talents and the market's push for lower product prices, enterprises hope to use fewer workers to complete the entire rolling process, requiring the traditional production mode to begin to change, which requires equipment with intelligent production functions.This requires the improvement and improvement of the equipment, electrical system and hydraulic lubrication system in the rolling mill area to meet the requirements of intelligent production, which is conducive to the realization of unmanned rolling.

4. High precision of rolling mill equipment

In the rolling process, the stand is the main part that bears the rolling force, which requires extremely high rigidity. The moving stand drives the rolls to reciprocate, and the vertical rolling force is borne by the fixed casing.This not only ensures the rigidity of the system, but also reduces the total weight of the moving part, reduces the generation of a part of the motion inertia, and reduces the working load of the motor.

5. Multifunctional rolling mill equipment

At the same time, the three-high Pilgrim mill has the advantages of large rolling deformation of the two-high rolling mill and high precision of the three-high rolling mill. One rolling mill can achieve the effect of two-high rolling mill + three-high rolling mill, and it has the effect of multi-purpose.

6. Stable rolling mill drive system

It is a planetary gear reducer that can realize high-speed and smooth linear reciprocating motion. The motor is input to the pinion, which is transmitted to the gear drum through the pinion. The gear drum and its internal planetary gear work together.It will have the effect of turning the rotary motion into a reciprocating linear motion. At the same time, the balance block is added, and the balance block has the effect of balancing the inertial force and inertia moment.

Seamless pipe is an important product, so in addition to improving the rolling mill, there is a matching intelligent caliper, which is an important instrument for the detection of the outer diameter of seamless steel pipes.It plays an important role in realizing automation, intelligence, high speed, and unmanned operation, and is an important part of quality inspection.It has important functions such as online, automation, intelligence, high-speed, software system, out-of-tolerance alarm, long-term storage, real-time, adjustable measurement range, etc., to complete the inspection of various specifications of pipes in production,

At present, the online caliper can detect the small size rolling material of 0.1mm, and can also complete the detection of thousands, tens of thousands of millimeters or even larger super size. Therefore, basically any size of seamless pipe in production can be inspected by the caliper.