Parameter setting method of hot continuous rolling thin slab coiling device and coiling method of hot continuous rolling thin slab

Abstract

The invention relates to a parameter setting method of a hot continuous rolling thin slab coiling device and a coiling method of a hot continuous rolling thin slab. The parameters to be set are as follows: an advance speed set value of each set of roller beds = a finish rolling final rack speed set value * (a total roller bed advance rate + advance rate of each set); a lagging speed set value of each set of roller beds = the finish rolling final rack speed set value * a roller bed lagging rate; the side guide plate pressure coefficient is 0.8 + / - 0.15; the side guide plate additional value is from +5 to +10 mm; and the pinch roll is set, and the pinch roll of the coiling device is standardized to ensure the regular standardization, the pinch roll advance rate, pinch roll lagging rate, pinch roll pressure coefficient, upper pinch roll diameter of the coiling device and lower pinch roll diameter of the coiling device. The coiling method is implemented by controlling the coiling device with a computer according to the setting parameters. By using the parameter setting method of the hot continuous rolling thin slab coiling device and the coiling method of the hot continuous rolling thin slab, the surface quality is improved and the rejection rate is reduced.

Description

technical field [0001] The invention belongs to the production and coiling process of hot-rolled strip steel, and specifically relates to the parameter setting and coiling method of a hot-rolled sheet coiling equipment with a thickness not greater than 3 millimeters. Background technique [0002] The production technology of hot-rolled thin strip with a thickness of ≤3.0mm, especially the hot-rolled thin strip with a thickness of ≤2.0mm, the coiling technology in the production organization is one of the difficulties in the production of hot-rolled thin strip. The AJC control system of the machine, the side guide opening and pressure output, the control accuracy of the transmission system, and the gap setting of the pinch roll and helper roll all have high requirements. During the production process, due to unreasonable production data, the hot-rolled sheet There are many quality problems. For example, if the shape of the head of the incoming material is not good, the strip...

AI Technical Summary

Problems solved by technology

For example, if the shape of the head of the incoming material is not good, the strip steel will swing from side to side due to the poor speed setting of the roller table, resulting in coil shape defects; Improper setting can lead to loose winding of the head after the roll-assisting roller is opened; or the edge of the steel coil is not uniform due to improper side guide opening. When the steel coil is turned from horizontal to vertical, the edge of the coil will Easy to fold; due to the unreasonable setting of parameters such as the lead rate of the roller table, the lag rate of the roller table, and the roll gap, the quality of the roll is affected, the pass rate is low, the rework rate of the thin plate (rewinding of the skin-passing unit) reaches 23.62%, and the scrap rate up to 1.74%

These quality problems will affect the further processing and production capacity in the next step, and at the same time affect the yield of steel products