Production method for reducing non-weld joint strip breakage occurrence rate during cold rolling process
A production method and a technology of occurrence rate, applied in the production field of reducing the occurrence rate of non-weld strip breakage in the cold rolling process, can solve problems such as long waste strip cleaning time, middle roll sticking, long downtime, etc., and achieve reduction of non-weld The number of occurrences of seam breaks, reduction in wear of rolls, and the effect of good economic benefits
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[0042] Example 1
[0043] In the production process in January, the hot-rolled incoming coil with a thickness of 2.3-2.5mm and nearly 1,000 coils was rolled. The shape value of the hot-rolled incoming coil was controlled as follows: the crown was controlled at 30μm, and the wedge was controlled at 10μm; the width of the hot rolled coil is controlled to be 15mm wider than the width of the material; when the hot rolled coil is cut at the entrance of the raw material, the cutting length of the head and tail is cut to 10 meters; to ensure the transmission of the cold rolling process The tension fluctuation between the side and the operating side is in the range of 0-5KN; after pickling, no obvious defects on the surface of the strip steel are observed through the surface inspection system, and the defect alarm system does not issue an alarm, indicating that there is no 50mm knot on the edge of the thin material. Defects such as scar, comet shape, folding, etc.; control the maximum sp...
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[0044] Example 2
[0045] In the production process in February, the hot-rolled incoming coil with a thickness of 2.3-2.5mm and nearly 1,000 coils was rolled. The shape value of the hot-rolled incoming coil was controlled as follows: the crown was controlled at 40μm, and the wedge was controlled at 10μm; the width of the hot rolled coil is controlled to be 17mm wider than the width of the material; when the hot rolled coil is cut at the entrance of the raw material, the cutting length of the head and tail is cut to 10 meters; to ensure the transmission of the cold rolling process The tension fluctuation between the side and the operating side is in the range of 5-10KN; after pickling, no obvious defects on the surface of the strip steel are observed through the surface inspection system, and the defect alarm system does not issue an alarm, indicating that there is no 50mm knot on the edge of the thin material. Defects such as scar, comet shape, folding, etc.; control the maximum ...
Example Embodiment
[0046] Example 3
[0047] During the production process in March, the hot-rolled incoming coils with a thickness of 2.3-2.5mm and nearly 1,000 coils were rolled. The shape value of the hot-rolled incoming coil was controlled as follows: the crown was controlled at 50μm, and the wedge was controlled at 20μm; the width of the hot rolled coil is controlled to be 18mm wider than the width of the material; when the hot rolled coil is cut at the entrance of the raw material, the cutting length of the head and tail is cut to 8 meters; to ensure the transmission of the cold rolling process The tension fluctuation between the side and the operating side is in the range of 0-7KN; after pickling, no obvious defects on the surface of the strip steel are observed through the surface inspection system, and the defect alarm system does not issue an alarm, indicating that there is no 50mm knot on the edge of the thin material. Defects such as scar, comet shape, folding, etc.; control the maximum...
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