There is no saying that when learning and learning, there must be a teacher for three people. Learn, then know, learn, and then make up for the deficiency. Learning, understanding and practicing are the key points of this trip of Huafeng board industry of timond bearing. Here again, I would like to thank Shandong Huafeng board industry for its recognition and support to timond bearing, and provide us with this learning opportunity!

The 1450 acid rolling combined unit of Shandong Huafeng plate industry is completed by Zhongzhi Jingcheng in the mode of electromechanical and hydraulic general contracting. The overall equipment is manufactured by domestic and foreign cooperation, and the technology is advanced and mature. The products meet the requirements of thin galvanized substrate. The rolling speed is stable to 1500m / min, the commonly used rolling speed is 1350m / min, and the monthly output of thin gauge products is more than 120000 tons, It represents the high level of domestic acid rolling technology.

The tour was accompanied by manager Li of Huafeng plate industry. The whole production line was conducted in the way of flashback visit. First, the company directly entered the site of the theme equipment six high and five continuous mills to get a close look at the smooth operation and efficient operation of the rolling mill.

The six high five continuous mill of the theme equipment adopts the advanced UCM model configuration, the intermediate roll can move, and the working roll and intermediate roll have positive and negative bending roll. Compared with the traditional model, it has the following advantages.

① The overall rigidity of the rolling mill is good, and the working roll with smaller diameter can be selected, which has the function of large reduction and can increase the reduction rate by about 10%. In this way, the thickness of the entrance strip can be increased to achieve high compression ratio rolling for the strip with the same thickness of finished product, so as to improve the performance and quality of cold rolled strip.

② When rolling different width of strip steel, the contact length between rolls is adjusted through the movement of intermediate roll, the distribution of contact stress between rolls is changed, and harmful contact is eliminated, so as to reduce the elastic deflection of work roll and improve the strip edge thinning.

⑧ Through the adjustment function of positive and negative bending roll of work roll and intermediate roll, combined with the function of intermediate roll shifting and large compression ratio rolling, the shape control function is greatly enhanced.

Effectively ensure the accuracy and competitiveness of products.

Then came to the pickling section of the export section, process section, entrance section

Among them, the process acid tank replaces the traditional shallow groove turbulent acid pickling technology to save energy and respond to environmental protection;

Cutting equipped with high-precision rotary disc shear, according to the incoming material automatically set the side gap and overlap;

It is equipped with Wuhan Kaiqi laser welding machine, with excellent welding quality and low band breaking rate. It can not only weld CQ, DQ, DDQ, HSS, HSLA steel, but also be suitable for welding special steel grades such as high carbon steel, high alloy steel, Si / Mn steel and Trp.

Later, I went to the grinding and assembly workshop. The roller grinding and bearing installation and maintenance were carried out in an orderly manner. The roll area, assembly area and backup roll area were placed in order.

The roller grinder is equipped with domestic mainstream machine tools, Kunshan Huachen CNC grinder. After supporting grinding, the outer diameter difference between the drive side and the operation side of the bearing inner ring is less than 0.015mm, the taper and out of roundness is less than 0.01mm, and the surface roughness is less than Ra0.4. It effectively guarantees the on-line running accuracy of the bearing.

It is equipped with a bearing installation trolley, especially the installation and disassembly of the support roller, which can realize the up-down, left-right movement and alignment, and reduce the scratch problem of the bearing inner ring and rolling body compared with the hoisting assembly.

The bearing washer is working to clean the tapered roller bearing off the machine

The intermediate roll and work roll are lubricated with grease, and the cleaning machine can remove the waste grease efficiently and quickly, which is convenient for better detection of various parts of the bearing.

The backup roller system bearings are equipped with four row cylindrical roller bearings of German fag, Jiangsu DMD and fcdp. As the bearing supplier of Huafeng plate industry, DMD has a closer and deeper understanding of the operation principle of the whole acid continuous rolling mill through this visit. Continuous, fast, efficient and seamless seamless production operation can make DMD people feel the importance of bearing as the core part of rolling mill section, and strengthen our manufacturing: confidence concept of more durable rolling mill bearing! We will continue to provide higher quality products and services for Huafeng plate industry and steel rolling industry, and make our own contribution to the development of metallurgical industry.