Roller coating control method for reducing damage to roller surface of coating roller

Abstract

The invention relates to a roller coating control method for reducing damage to the roller surface of a coating roller. The roller coating control method comprises the following steps of (1) the liquid taking roller position zero calibration control process; (2) the coating roller position zero calibration control process; (3) the liquid taking roller abutting process; (4) the coating roller abutting process; and (5) the roller coating machine passing weld joint process. Through the control method, the adverse influence of roller surface abrasion on the automatic control process is eliminatedby adding liquid taking rollers and a coating roller automatic position zero calibration and pressure zero calibration model of the coating roller abutting process, and the pressure control precisionof a roller coating machine is improved. Width and thickness data of strip steel are collected in real time to optimize a control model during roller coating and abutting when the weld joint of the strip steel passes through the coating rollers so as to reduce scratches of the strip steel at the weld joint to the local surfaces of the coating rollers and surface deformation and cracks caused by sudden increasing of the pressure of the coating rollers due to increasing of the thickness of a back coil of strip steel.

Description

technical field [0001] The invention relates to a roller coating control method for reducing damage to the roller surface of an applicator roller, and belongs to the technical field of roller coating control. Background technique [0002] In order to meet the corrosion resistance requirements of home appliances and industrial equipment on the surface of steel plates, it also provides good surface coating properties, heat and humidity resistance, and fingerprint resistance for home appliances and automotive sheet products, and prevents white rust during transportation and processing. Defects, in the product post-processing process of the cold-rolled hot-dip galvanized production line, the roll coater is commonly used to apply the specified chemical coating to the surface of the strip. see figure 1 As shown, the roller coater is usually a four-roller vertical structure, which is mainly composed of an upper coating roller, an upper liquid-taking roller, a lower coating roller ...

AI Technical Summary

Problems solved by technology

[0003] At present, there are the following problems in the strip steel roller coating process: 1) When the thickness and wide-band specifications of the two strips before and after the production line change, especially when the strip steel is switched from thin gauge to thick gauge or narrow gauge to wide gauge, often When the weld seam welded by the front and rear strip steel passes through the coating roller of the roller coater, it is very easy to cause the edge of the rear strip to scratch the surface of the coating roller locally, or the local pressure on the surface of the coating roller increases sharply, causing the surface Cracking due to extrusion deformation, resulting in missing or uneven coating defects on the surface of the strip, and at the same time, the coating roller is scrapped, which affects the service life of the coating roller and the product qualification rate

2) The pressure adjustment between the coating roller and the steel strip, between the coating roller and the liquid extraction roller of the existing roller coater is mostly manual or automatic, and the manual pressure adjustment mainly relies on personal experience and has large errors, and the automatic adjustment is often unable to be effective in real time The detection of normal wear on the roller surface leads to large accumulative errors in pressure adjustment and low pressure control accuracy, which may cause uneven radial pressure distribution on the roller surface of the coating roller and cause deformation and cracking of the polyurethane material on the roller surface. Therefore, there is an urgent need A new solution to this technical problem

Images