A rolling method for narrow section width control of hot-rolled steel strip

Abstract

A rolling method of hot rolling strip steel narrow interval width control belongs to the technical field of steel rolling and machining. A slab width gauge is additionally arranged in a feed roller channel of a heating furnace, so that slab width values measured by the slab width gauge can be transferred to a rough rolling pre-computation model in sufficient time. Meanwhile, the problem of unavailability of data transfer between a CCID model of a heating furnace model and a Siemens model of a rough rolling width pre-computation model is solved, and exact slab width values are transferred to the rough rolling pre-computation model to ensure the accurate data calculation. According to the rolling method of hot rolling strip steel narrow interval width control, a slab thermometer is used for converting slab cold state width to be transferred to a hot rolling steel strip control mathematical model, the actually measured slab width is used for replacing the planed slab width, so that the deviation of a calculated value to an actual value of a width model vertical roll rolling force, the ability to control the accuracy of the width model is enhanced, the calculation accuracy of the width model is greatly improved, accordingly width unplanned products are greatly reduced, and annual estimated profit can be 3.85 million yuan.

Description

technical field [0001] The invention relates to a rolling method for controlling the width of a narrow section of hot-rolled strip steel, and belongs to the technical field of steel rolling methods. Background technique [0002] In the production process of hot-rolled strip steel, due to the instability of continuous casting casting speed and other factors, the width of rough-rolled incoming slab fluctuates greatly, usually in the range of -15mm to 30mm. Since the second-level width model cannot obtain the real slab width value, only the original slab data can be used, that is, the default slab width is used, resulting in a large deviation between the rolling force calculated by the vertical roll of the width model and the actual value, and the slab When the actual width is 15mm larger than the planned slab width, there will be a deviation of 80 tons between the calculated rolling force of the vertical roll and the actual rolling force, which seriously affects the width cont...

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a rolling method for controlling the narrow interval width of hot-rolled strip steel. This method can enable the slab width gauge to have enough time to pre-calculate the rough rolling width, and at the same time solve the problem of slab width. The method of transferring the accurate value of the billet width to the rough rolling pre-calculation model, and improving the defects of the Siemens model itself