Hot Rolled Ribbed Steel Bar Production Line

Raw material: 150x150x6000mm continuous casting billet.
Finished product specifications: φ5.5-φ20mm round steel and ribbed steel. High quality carbon steel, low alloy steel, bearing steel, welding rod steel, etc.
Rolling speed: max 90 m/s.
Annual production: 50,000-300,000 tons/year.
The whole line adopts full continuous twistless rolling. The finishing mill adopts high-precision cantilever compact rolling mill with fast rolling speed (up to 95m/s), high output, high product precision and high mechanical performance. The equipment investment is large, and the quality of the process operation and equipment maintenance personnel is high. Suitable for large-scale market, high-end users, and organize mass production.
The raw material is generally 150x150x12000 or even larger continuous casting billet.Main equipment configuration:
Rough rolling, medium rolling mill:Short stress line mill. The short-stress line rolling mill without the archway has a light weight, high rigidity and high precision. It is the lightest model in the current mainstream models. Fixed rolling line rolling can be achieved.Can be conveniently arranged in an alternating manner to achieve torsional rolling;The roll changer is replaced by the entire frame, which is fast and efficient, and saves the roll change time. However, it is necessary to prepare a spare rack online.The rolling rod and bearing housing of the rolling mill are made of alloy steel with excellent mechanical properties and can withstand high rolling force;The roll gap adjustment adopts the form of quick adjustment of hydraulic motor + manual precision adjustment, which is efficient and accurate;The rolling mill can be moved horizontally/vertically to achieve fixed rolling line rolling;Closed two-roll mill. The utility model adopts a relatively light closed mill rolling mill, the rolling mill has high rigidity, the bearing seat has a simple structure and the operation is simple, and the fixed rolling line rolling can be realized.The rolling mill arch is cut with a whole piece of hot-rolled steel sheet, which has high strength and high rigidity of the rolling mill. Lighter than cast-type closed frame of the same rigidity, this frame can also be arranged alternately in a flat position to achieve torsional rolling;The roll assembly is designed to be quickly removed, using a hydraulic roll changer to achieve rapid roll change;The roll gap adjustment adopts the form of quick adjustment of hydraulic motor + manual precision adjustment, which is efficient and accurate;The rolling mill can be moved horizontally/vertically to achieve fixed rolling line rolling;Pre-finishing unit: cantilever compact unit.The roll shaft is cantilever type, the mill is small in size and compact in structure. The roll is in the form of a roll ring for quick and easy replacement;The roll shaft support adopts oil film bearing, which has compact structure and large bearing capacity;High speed heavy duty gear transmission;Rolling mills are alternately arranged to achieve torsional rolling;A looper is arranged between the frames to achieve tension-free rolling;Finishing mill: 10 rack cantilever type twistless high speed heavy duty unit.The top cross is 45° alternately arranged, the 10 racks are not twisted and rolled, and the tension between the frames is micro-tension rolling;Cantilever roll shaft, oil film bearing support, small mill size, small rotational inertia of rotating parts, high rolling speed and large rolling force. Achieve high speed rolling;High-precision high-speed heavy-duty gear transmission, high transmission precision, strong carrying capacity and high running speed. Can achieve 750 °C warm rolling, rolling speed up to 95m / s;The roll is a tungsten carbide roll ring, which has strong wear resistance, long service life and fast roll change;Pinch roller:Welded boxHigh precision high speed heavy duty gear transmission;The work roll is a tungsten carbide roll ring, which is wear-resistant, has a long service life, is quick to replace, and is common to the finishing mill;Wire laying machine:Welded boxHollow shaft + high precision bevel gear transmission;Straight section + curved section of the wire drawing tube is in contact with red steel, with long service life and convenient replacement;Scissors: start/stop flying shears. There are mainly two kinds of crank four-link flying shears and rotary flying shears. The former is used to cut the intermediate blank of a large section, and then used for the finished double-cutting. The head and tail of the rolling stock can be cut and broken.High-precision, heavy-duty gear transmission, hard-toothed gear without backlash;
Welded boxDC motor dragging;Long life cutting edge;Water-cooling system: On-line heat treatment equipment can realize controlled rolling and controlled cooling of rolled products and improve the grain size and mechanical strength of the rolled products.Composition: water penetration section, recovery section, fast moving trolley, control valve, booster pump, water supply system, automatic control system;The water-passing nozzle adopts wear-resistant and corrosion-resistant materials and has a long service life;Fast moving trolley for quick change of slot;Air-cooled transportation line: According to the variety of rolling stock, the air-cooled transportation line can be designed into standard type, strong cooling type and slow cooling type.Roller group of group drive, variable frequency motor speed regulation;Slow cooling type insulation cover;Strong cooling fan unit. With wind direction and air volume adjustment valve;It can realize the functions of forced rapid cooling, standard cooling and heat preservation of finished products;P/F transport aircraft: "drive/swim" transport aircraft. The unwound wire coil on the C-shaped hook is naturally cooled by air to be bundled, weighed, and unwound in subsequent processes.Flexible layout and small footprint;Low-cost, reliable chain drive system;Flexible "drive/swim" converters for strong buffering of the entire transport line;Transmission and automation: The main drive of the rolling mill is recommended for DC drive or AC variable frequency rotation. Full line rolling enables fully automated control. Cooling and finishing except the signage requires manual operation, and all others are automatically controlled.