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Adjustment of uneven longitudinal thickness of packaging steel strip
by：Hongmei
2021-03-15
Adjustment of uneven longitudinal thickness of packaging steel strip
The uneven longitudinal thickness of the strip is one of the main rolling defects. Among the listed factors that affect the longitudinal thickness unevenness, the instability of the rolling process and the tension fluctuation caused by the poor quality of the billet and the low adjustment precision of the rolling mill are the two most important factors. Practice has shown that it is difficult to produce products with uniform longitudinal thickness when coils with poor longitudinal quality (uneven thickness and mechanical properties) are still rolled on a manually operated rolling mill. When using a single machine for production, if the rolling speed is low (for example, about 0.5m/s), manual thickness measurement can be performed. Only frequent measurement and adjustment are required. The adjustment technology is relatively simple. When the rolling speed exceeds 0.8m/s At the above, it is difficult to carry out manual thickness measurement, and it is necessary to install a thickness measurement system for detection and display for adjustment. When using the continuous rolling mill for production, due to the high rolling speed (generally 2.5-5.0m/s), in addition to the thickness measurement system must be installed, the adjustment technology is also more complicated. Therefore, only the adjustment technology of the longitudinal thickness unevenness of the continuous rolling mill will be discussed below.
The uneven longitudinal thickness of the strip is one of the main rolling defects. Among the listed factors that affect the longitudinal thickness unevenness, the instability of the rolling process and the tension fluctuation caused by the poor quality of the billet and the low adjustment precision of the rolling mill are the two most important factors. Practice has shown that it is difficult to produce products with uniform longitudinal thickness when coils with poor longitudinal quality (uneven thickness and mechanical properties) are still rolled on a manually operated rolling mill. When using a single machine for production, if the rolling speed is low (for example, about 0.5m/s), manual thickness measurement can be performed. Only frequent measurement and adjustment are required. The adjustment technology is relatively simple. When the rolling speed exceeds 0.8m/s At the above, it is difficult to carry out manual thickness measurement, and it is necessary to install a thickness measurement system for detection and display for adjustment. When using the continuous rolling mill for production, due to the high rolling speed (generally 2.5-5.0m/s), in addition to the thickness measurement system must be installed, the adjustment technology is also more complicated. Therefore, only the adjustment technology of the longitudinal thickness unevenness of the continuous rolling mill will be discussed below.
