(1) Adjust the roughness of the surface of the galvanized sheet. By controlling the roughness of the surface of the work roll of the finishing machine, the coated steel plate can make the original uneven roughness of the surface of the galvanized sheet to a certain range. In this way, the paintability of the product and the lubricity during processing can be improved.
(2) Improve the surface flatness of the galvanized sheet. After finishing, the flatness of the galvanized sheet has been improved to a certain extent. The corrugated part of the galvanized sheet can also flatten the surface slag particles or uneven points, making the surface smooth and flat.
(3) Processing function of galvanized sheet. After finishing, the yield channel of the galvanized sheet can be eliminated or insignificant, and the occurrence of metal slip lines in the future processing can be avoided.
(4) Appearance color of galvanized sheet. For small spangle and no spangle products, the galvanized steel sheet can obtain a more uniform and uniform surface after smoothing. For some private enterprises to choose large spangle products as color coating substrates, it can make the spangle bumps and different gloss levels formed by the crystallization of the large spangles flat, making the spangles blurred, which is beneficial to the coating process. Cover up the spangles when installing.
