Control method of variable pressure on side guide plate of hot continuous rolling chromium series stainless steel coiler

Abstract

The invention discloses a side guide plate variable pressure control method of a hot-continuous-rolled chromium-series stainless steel recoiling machine, which is suitable for recoiling control of hot-rolled strip steel, that is, when the head of the strip steel penetrates through a side guide of the recoiling machine, a first-grade computer realizes a recoiling side guide pressure control procedure according to a second-grade sent chromium-series stainless steel mark and a recoiling load signal: a side guide variable pressure reference value is put into control for 800 milliseconds after the control of 100% side guide original pressure reference value for 300 milliseconds; the side guide variable pressure reference value is put into control for 800 milliseconds after the control of 100% side guide original pressure reference value for 300 milliseconds; and the side guide pressure reference values are alternately changed to control the recoiling side guide until the tail of the strip steel leaves from the side guide of the recoiling machine to retreat from the recoiling side guide pressure control. The control method eliminates the major quality hidden trouble of pocks and horn coils on the edge and the surface of the strip steel caused by the recoiling of side guide mechanical equipment, solves the influence on strip steel product quality caused by the recoiling of side guide, and improves the product pass percent.

Description

technical field [0001] The invention belongs to the field of coiling control of hot continuous rolling strip steel, and relates to the automatic control of the side guide plate of the hot continuous rolling strip steel coiler. Background technique [0002] At present, when the coiler is coiling steel, one side of the coiling side guide plate is controlled by pressure. Due to the large change in the width of the stainless steel strip, it is very easy to cause a large pressure on the edge of the strip by the side guide plate, resulting in hot continuous rolling stainless steel coiling. The quality of the edge has not been very good, resulting in the edge of the strip being gnawed, a large number of pits on the surface of the strip, and in severe cases, horn rolls will occur, and the side guide equipment is also seriously damaged. To improve the edge quality of the coiled strip and ensure the coil shape, the side guide pressure control of the hot-rolled coiled strip is one of t...

AI Technical Summary

Problems solved by technology

[0002] At present, when the coiler is coiling steel, one side of the coiling side guide plate is controlled by pressure. Due to the large change in the width of the stainless steel strip, it is very easy to cause a large pressure on the edge of the strip by the side guide plate, resulting in hot continuous rolling stainless steel coiling. The quality of the edge has not been very good, resulting in the edge of the strip being gnawed, a large number of pits on the surface of the strip, and in severe cases, horn rolls will occur, and the side guide equipment is also seriously damaged