On-line accurate positioning device and method in heating furnace plate blank

Abstract

The invention mainly relates to the field of automatic control, in particular to an in-furnace online accurate positioning device and method for a heating furnace slab. The accurate and stable online positioning control method for the plate blank before discharging of the heating furnace is provided by combining the tracking of the plate blank in the walking beam furnace, the discharging furnace wall penetrating laser photoelectric tube and the walking beam magnetic ruler. Due to the reason of the through-wall laser detector, the situation that signal flash occurs in the middle when the through-wall laser detector does not detect or has detected the through-wall laser detector, so that the calculated value of the distance of the slab passing through the through-furnace wall photoelectric tube can be directly influenced; at the moment, slab tracking data are introduced to calculate a second laser passing distance, the second laser passing distance is compared with the first laser passing distance calculated before for correction, and problems can be found in time.

Description

technical field [0001] The invention mainly relates to the field of automatic control, in particular to an on-line precise positioning device and method in a slab furnace of a heating furnace. Background technique [0002] The raw material slabs used in the rolling line production need to be heated by the heating furnace before entering the rolling line for rolling. Therefore, whether the heating furnace can ensure safe and normal operation and heat up qualified steel slabs has a great impact on the continuous and stable operation of the entire rolling line. Production plays a crucial role in determining. The precise positioning control technology of the slab in the furnace is one of the core control technologies in the automatic control system of the heating furnace, especially the position tracking of the slab before it is released from the furnace is related to the precise control of the two parts of the walking beam and the tapping machine in the furnace. Usually, the p...

AI Technical Summary

Problems solved by technology

However, in actual production, it often happens that the tapping machine does not place the slab on the center line of the discharge roller table, and during the transportation of the slab, it scrapes the edge of the roller table, damages the roller table, and delays production. The reason is that The photoelectric tube passing through the furnace wall produces false signals due to various reasons. Therefore, the precise positioning of the slab out of the furnace and the precise selection of steel by the tapping machine are an important part of achieving stable production of the furnace.

Images