According to the deviation of the speed command “ Un* ’’ and the speed feedback “ Un ” , the output is the given signal “ Ui* ” of the current command (for the DC motor, controlling the armature current is controlling the electromagnetic torque, and the corresponding speed can be adjusted).
How to Adjust Rolling mill Speed Control System? Read More »
Recent years, regenerative combustion technology has been widely used in heating equipment. Compared with the heating furnace without waste heat recovery, regenerative heating furnace can save more than 40% energy. However, the investment cost is high, and there is the concept of saving energy without money saving. Recently, double regeneration (preheating gas and air 1000℃) technology is recommended for heating furnace to use surplus blast furnace gas. The efficiency is higher than 70%, and the energy saving is obvious.
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Steel rolling is a method of pressure processing that can be processed to obtain the desired shape and improve the internal quality of the steel. So what are the main safety technologies for steel rolling? Below is the relevant information.
What are the Main Safety Technologies for Steel Rolling? Read More »
The operating procedures of the rolling mills consists three aspects, namely the pre-production operating rules, the production operating rules and the safe operating rules. The following is the detailed introduction.
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Generally, there are strict rules and regulations in the production process of rolling mill workshop, because there is a certain risk in operating rolling machinery and equipment. Since the development of rolling mill, many industrial products on the market have been produced directly or indirectly by rolling mill. The development of rolling mill in the future is to eliminate a large number of labor costs in the production of rolling mill. Rolling mill is the most critical equipment for iron and steel enterprises. Rolling mill promotes the development of many industries.
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Full continuous, no twist, high speed rolling. The roughing rolling mill and intermediate rolling mill are alternately arranged, and the pre-finishing rolling mill is installed in front of finishing mill. The maximum finishing rolling speed is 120m/s. The latest rolling speed guaranteed by the production practice will be proposed according to the different specifications of the wire rod, such as Siemens in 2010. The company has designed and manufactured high-speed wire rod mills for Xuanhua Iron and Steel Co., Ltd., and its final rolling speed guarantee value: small 5.5-7.5mm, wire rod 112m/s, medium φ5mm wire rod l 105m/s, The small φ6mm hardened rebar is 85m/s.
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The composition of rolling mill machine can be divided into two categories: main equipment and auxiliary equipment. As long as the device that directly causes plastic deformation of the rolled product, it is called the main device, also called host column. Auxiliary equipment refers to a variety of equipment other than the host column, which is used to complete a series of auxiliary operations.
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The finishing process of the section steel mill is the important part of the production of profile steel. It will roll-form the semi-finished products for cooling, straightening, cutting, heat treatment and inspection, classification, elimination of defects, packaging, marking treatment, making it the finished steel that meets technical standards. Therefore, the level of the finishing equipment directly affects the quality of the product. One of the important signs of the modern steel rolling mill is the continuous and automated finishing equipment.
Finishing Equipment of the Rolling Mill Read More »