Recently, 159 hot rolling Department has successfully upgraded the discharge block of large cooling bed to ensure the external surface quality of products and continuously promote the project of "four reductions and two improvements".

The surface of discharge block of large cooling bed used for a long time will be uneven due to serious wear. In the production process, the surface of the pipe body is scratched by oblique line, which seriously affects the product quality. At the same time, the common problems such as the speed of hot rolling roller block unloading and oil spraying block unloading were reduced, but the quality of the products was not improved by the repeated methods such as feeding, grinding and so on.

In practice, 159 hot rolling Department has been exploring, learning and summarizing, and finally found a solution to the problem. Two vertical rollers with a diameter of about 50 mm are added on the discharge block. The vertical roller protrudes from the plane of the discharge block, which transforms the sliding friction between the pipe body and the discharge block into the rolling friction between the pipe body and the vertical roller, which greatly reduces the tube body scratch. In addition, a bearing is added in the middle of the vertical roller to connect the glycerin pipe to ensure the lubrication, so as to solve the problem of pipe body abrasion and re emergence caused by the grinding of vertical roller.

After more than 20 days of field practice, the upgrading effect of the unloading block is remarkable, and the abrasion of the pipe body is obviously improved, which ensures the product quality. At present, four discharge blocks of large cooling beds have been reconstructed.

Subsequently, 159 hot rolling department, together with the equipment operation Department, focused on the problem of tube body abrasion, strengthened inspection, and did a good job in the maintenance of reconstructed discharge block to ensure the smooth operation of production.