The flywheel of the rolling mill is subjected to impact load during rolling. The rolling mill drives the rolling mill through the flywheel and reducer. A part of the load is released by the flywheel. The main drive of the rolling mill requires high dynamic response and high overload capacity. Flywheels are widely used in cutting machines, stamping machinery, etc. The spokes of the flywheel adopt a ring-shaped planar plate structure whose thickness is close to that of the flywheel. The flywheel of the rolling mill works in the best condition, which can reduce the heat of the motor and save power.
When the rolling mill is under load, the flywheel of the rolling mill slows down and releases energy to help the motor overcome the peak load. The thickness change gradient between the spokes and the hub is small, so the structural defects that stress concentration and cracks are easily caused at the joint are eliminated. Increase the thickness of the flywheel and reduce the diameter of the flywheel under changing conditions are also conducive to uniform stress distribution and increase the load-bearing capacity. When there is no load in the gap, the flywheel accelerates and stores energy, so the motor load can be evened. When disassembling the flywheel and pulley of the rolling mill , When tightening the nut, etc., it is strictly forbidden to use a hammer or hardened steel parts to hit, and the static balance of the flywheel should also be tested during installation.
The new high-output rolling mill equipment is equipped with online multiple straightening machines and cold cut-to-length flying shears behind the cooling bed. The rolled pieces are straightened by multiple lengths of the entire length of the cooling bed, followed by shearing blades. A flying shear with a pass cuts the rolled piece into commercial cut-to-length lengths. The rack-type step-by-step cooling bed is used to cool the rolling material evenly, and the simple cross-section steel such as round steel, rebar and other simple cross-section steels have good flatness after cooling, and can be delivered without straightening. For channel steel, angle steel, I-beam and other profiled materials, they need to be straightened after being cooled by a cooling bed. The double ruler is redundant and straightened, the number of head bites is greatly reduced, there are fewer accidents, and the efficiency is high. Using this technology and equipment, the production is mechanized and the degree of automation is high, which greatly reduces the finishing area and operators.
After the molten steel produced by the converter is refined in the refining furnace, the molten steel needs to be cast into billets of different types and specifications. The continuous casting section is the production process of continuously casting the refined molten steel into steel billets. The main equipment includes a turntable, a tundish, a mold, and a tension leveler.
The non-sinusoidal vibration technology of the mold has significant effects in improving the drawing speed, improving the surface quality of the casting slab, and reducing the leakage rate. This technology can not only increase the drawing speed of the continuous caster, increase the productivity, reduce the leakage of the continuous caster, and stabilize the production of the continuous caster, but also can provide high-quality cast slabs for rolling and improve the quality of the rolled material. To
The ladle containing refined molten steel is transported to the turntable. After the turntable rotates to the pouring position, the molten steel is injected into the tundish, and the tundish distributes the molten steel to each mold through the nozzle. The mold is one of the core equipment of the continuous casting machine, which makes the casting shape and rapidly solidify and crystallize. The tension leveler and the crystal vibration device work together to pull out the castings in the crystallizer, and cut them into slabs of a certain length after cooling and electromagnetic stirring.
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Continuous casting automation control mainly includes continuous casting machine drawing roll speed control, mold vibration
Control technologies such as dynamic frequency control and fixed-length cutting control. Continuous casting and rolling requires the continuous casting machine to be able to produce high-temperature billets, and the cast billets have high surface quality and internal quality. At the same time, the continuous casting machine is required to have stable and high productivity and high drawing speed to meet the needs of high-speed rolling. Mold non-sinusoidal vibration technology is the key technology of continuous casting and rolling.
Post time: Jul-03-2021