At the beginning of 2020, the new type of horizontal vertical composite rolling mill independently developed by Beijing Jingcheng Ruixin long Material Engineering Technology Co., Ltd. of MCC Jingcheng has been successfully put into use in the bar production lines of two domestic steel enterprises, and has been running stably up to now (see Figure 1). The new type of flat vertical composite rolling mill overcomes the disadvantages of traditional flat vertical conversion rolling mill, and combines with the new generation of slitting controlled rolling and controlled cooling technology developed by MCC Jingcheng, realizes the low-cost and high-efficiency production of new national standard ribbed steel bar, and brings good economic benefits for the enterprise.
Figure 1 the new type of flat vertical compound rolling mill has been put into operation successfully
The continuous rolling process can be used to produce round steel, square steel, flat steel, slitting steel bar, channel steel and angle steel on modern long product line. For symmetrical section products such as round steel, square steel and large-size steel bar, in order to ensure the size and quality of products, the finishing mill usually adopts “flat vertical” alternate arrangement to realize non torsion rolling; for small-sized steel products, in order to ensure high hourly output, the finishing mill group usually adopts “flat vertical flat flat” layout to realize multi line split rolling; for flat steel, it adopts “flat vertical and flat” layout to realize multi line splitting rolling According to the requirements of pass and rolling schedule, irregular horizontal vertical flexible arrangement is required for finishing mill to meet the variety of pass. Therefore, if it is necessary to produce round steel, square steel, single large-size steel bar, slitting small-sized steel bar, flat steel, channel steel, angle steel and other products in a continuous rolling production line, multiple traditional horizontal and vertical conversion rolling mills are often used in the finishing mill.
However, over the years, all manufacturers have reported that there are many problems in the flat vertical conversion mill, such as the rotating frame is thin and easy to be deformed and damaged, the rolling mill vibrates greatly, the conversion is not in place, the operation and maintenance is difficult, and the accident rate is high. Forced by helpless, many production lines can only give up the vertical rolling mill mode and only use the horizontal mode. In the end, the so-called flexible conversion device has become a device that can not be seen and used in China. As a result, the production line can not meet the production requirements of multiple varieties of processes, but also limits the production efficiency and product quality. Faced with the “pain point” of this industry for many years, MCC Jingcheng Credit Suisse long material innovation proposed to have independent horizontal and vertical composite rolling mill mode in the same stand position, combined with its own proprietary technology product of the fifth generation short stress line intelligent core, developed a patent product new H & V flat vertical composite rolling mill (Patent No. 201811610970.8201822215616.7) (see Fig. 2). This model improves the stability of rolling mill operation, reduces the cost of equipment maintenance, and can adapt to the new generation of slitting controlled rolling and controlled cooling technology to realize low-temperature finishing rolling process, which greatly improves the production efficiency and efficiency.
Fig. 2 new type flat vertical compound rolling mill in production
The equipment composition of the new flat vertical compound rolling mill is as follows
(1) Horizontal mill train, including rolling mill body, horizontal mill spindle, horizontal traverse device, horizontal spindle bracket, horizontal mill reducer and horizontal motor (see Fig. 3);
(2) Vertical mill train includes rolling mill body, vertical mill spindle, vertical lifting device, vertical pushing device, vertical spindle bracket, vertical mill reducer and vertical motor (see Fig. 4).
Vertical and horizontal composite rolling mill
Fig. 4 new type flat vertical compound rolling mill – vertical assembly state
Technical parameters of the new type of flat vertical compound rolling mill:
The main technical features of the new type flat vertical compound rolling mill are as follows
The fifth generation short stress line mill of MCC Jingcheng is adopted for the mill body, which has high strength, high rigidity and high precision, and can realize remote intelligent roll gap adjustment with load;
The double speed ratio reducer can be configured to meet the requirements of various rolling pass systems and force energy;
The rolling process is flexible, which can realize various rolling modes such as conventional rolling, low temperature finishing rolling and multi line slitting;
The horizontal and vertical states of the rolling mill are independent of each other and can be switched flexibly and accurately;
√ with high degree of electrical automation, the horizontal or vertical transmission mode can be automatically switched according to the rolling schedule;
√ it adopts three-dimensional design and can be embedded into digital chemical plant system to realize intelligent control.
As a professional long material engineering technology company which ranks first in the domestic metallurgical industry and is comparable to the international advanced level, MCC Jingcheng Credit Suisse has been committed to the innovation research of long profile technology and the research and development of advanced intelligent equipment to enhance the competitiveness of China’s iron and steel industry for decades. Its successful development and operation of the new type of flat vertical composite rolling mill integrates advanced concepts such as flexibility, reliability and intelligent adjustment, which can not only rejuvenate the old line, but also make the configuration of new line more bright. Now it has formed 350, 450, 550 and other series of horizontal and vertical composite rolling mills, providing better solutions for the rolling mill configuration of bar and section steel production lines.