Advanced method for producing a roller-coating color steel plate with multicolored patterns

An advanced method for producing a roller-coating

• color steel plate with multicolored patterns, comprising in sequence the following process steps of
• A. preparing a steel strip to be printed;
• B. performing a pre-processing on the steel strip to be printed;
• C. using a first roller coating unit to perform a first roller coating transfer on the steel strip to be printed;
• D. using a second roller coating unit to perform a second roller coating transfer on the steel strip to be printed after a preset time;
• E. performing a post-processing to spray the steel strip with gloss paint;
• wherein,
• in the step C, a servo control system is used to control the first roller coating unit, and the servo control system has the following control process of
• S1. inputting data of a diameter of each of a plurality of first rollers and a process speed of the first roller coating unit into a PLC control module, then calculating out a theoretical roller surface linear velocity of the plurality of first rollers by the PLC control module according to the process speed and the diameter of each of the plurality of first rollers such that the theoretical roller surface linear velocity of the plurality of first rollers equals the process speed, and outputting the theoretical roller surface linear velocity of the plurality of first rollers into a servo control module having an encoder;
• S2. receiving, with the servo control module, the theoretical roller surface linear velocity of the plurality of first rollers from the PLC control module and driving the plurality of first rollers according to the theoretical roller surface linear velocity;
• S3, collecting an actual roller surface linear velocity of the plurality of first rollers by the encoder and outputting the actual roller surface linear velocity of the plurality of first rollers into the PLC control module;
• S4. according to the actual roller surface linear velocity and the theoretical roller surface linear velocity of the plurality of first rollers, adjusting a current frequency of an electrical machine for driving the plurality of first rollers and adjusting the actual roller surface linear velocity of the plurality of first rollers to be equal to the theoretical roller surface linear velocity of the plurality of first rollers by the PLC control module, thereby completing a roller coating transfer of the first roller coating unit;
• the first roller coating transfer and the second roller coating transfer are respectively used to print patterns on the steel strip to be printed;
• in the sub-step S1 of step C, data of a distance between the first roller coating unit and the second roller coating unit is input into the PLC control module, and on the basis of the process speed and the data of the distance, the PLC control module calculates out a time to start the second roller coating unit, and starts the second roller coating unit according to the time, and then the second roller coating transfer of the second roller coating unit is completed;
• after the sub-step S4 of step C, the patterns are collected by a code recognition module, and a pattern misplacement distance is determined by computer recognition, and then the process speed of one of the first roller coating transfer unit and the second roller coating transfer unit is revised.