Method for controlling automatic equidistant steel tapping of heating furnace

Abstract

The invention relates to a method for controlling automatic equidistant steel tapping of a heating furnace, comprising the following steps of: setting steel tapping intervals; obtaining the time that billet is conveyed to the outlet of a heat insulating roller bed according to the distance from the head of the billet in the heating furnace to a hot metal detector at the outlet of the heat insulating roller bed and the speed of the roller bed; calculating the line speed of the billet in a 0# rolling mill; calculating the time that the tail of the billet is separated from the hot metal detector at the outlet of the heat insulating roller bed and enters the 0# rolling mill; calculating the time S3 when the furnace door of the heating furnace is opened; comparing the speed of the billet in the rolling in actual production with the linear speed of the billet in the 0# rolling mill, wherein if the difference is smaller than or equal to 10% of the linear speed of the billet in the 0# rolling mill, S3 is used as the time that the furnace door is opened, and if the difference is greater than 10% of the linear speed of the billet in the 0# rolling mill, the time S3of opening the furnace door calculated previously is retained. The invention can avoid repeat steel heaping and reduce delay of machine halt, thereby the dimensional accuracy of the product is improved, and the hour yield of roll line production is improved greatly.

Description

technical field [0001] The present invention relates to a heating furnace automatic equidistant tapping control method, specifically, the tail of the upper support steel leaves the first rolling mill stand (0#) and the head of the lower support steel enters the first rolling mill stand (0# ) constant spacing control method. Background technique [0002] High-speed wire rod production line: heating furnace----high pressure water descaling----rough rolling unit (0#-7#)----CV50 flying shear----intermediate rolling unit (8#-11#)- ---Pre-finishing rolling unit (12#-15#)----CV20 flying shear----finishing rolling unit BGV(16#-25#)----1#, 2# water tank---water cooling Pinch roll----3# water tank----intelligent pinch roll----laying machine TFH----delayed Stelmore air-cooled transportation line----coil collection---- PF transportation line----finishing----unloading----storage. Large coil production line: 4#, 5# water tank----2# shear----CCR unit (16-19 frame, 6#-9# looper)----6# wa...

AI Technical Summary

Problems solved by technology

In the past, when the steel was manually tapped, the heating furnace could not automatically tap the steel at equal intervals, that is, the distance between the tail of the upper support steel leaving the first rolling mill stand (0#) and the head of the lower support steel entering the first rolling mill stand (0#) If the control is not good, when the distance is too close, it is easy to pile up steel when it arrives at the pre-finishing mill; if the distance is too large, it will seriously affect the machine-hour output

The main operator has to make up for it by constantly adjusting the tension of the rough and middle rolling, which seriously affects the quality of the product

In addition, with the continuous development of products, the tapping spacing of various varieties is not consistent. The labor intensity of completely relying on manual adjustment of the tapping spacing is too high, and the machine-hour output is low, which seriously lags behind the production.

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