Speed hierarchical control device and method for front roller way of finish rolling flying shear

Abstract

The invention discloses a speed hierarchical control device and method for a front roller way of a finish rolling flying shear. The device comprises a rough mill (01), an intermediate billet (02), anintermediate roller way (03), a first photoelectric tube (04), a first speed measuring roller (05), an optical grating (06), the flying shear (07), a second speed measuring roller (09), a finish rolling F1 rack (11), a finish rolling F2 rack (12) and a finish rolling F3 rack (13); a second photoelectric detection device is arranged above the intermediate roller way; the second photoelectric detection device is located between the first speed measuring roller and the optical grating; and the speed of the head of the intermediate billet is reduced to the middle gear speed when reaching the firstphotoelectric tube, and the speed of the intermediate billet is reduced to the shearing speed when reaching the second photoelectric detection device, namely a speed level is added between the firstspeed measuring roller and the optical grating. According to the speed hierarchical control device for the front roller way of the finish rolling flying shear provided by the invention, the photoelectric detection device is additionally arranged in the area in front of a finish rolling inlet flying shear, fine hierarchical control is conducted on the roller way speed of the inlet area based on theposition of the tail of front strip steel, the strip steel carrying time of the area in front of the finish rolling flying shear is shortened, and the rolling rhythm is improved.

Description

technical field [0001] The invention relates to a roller table speed control device and method for hot continuous rolling and finishing rolling, in particular to a speed grading control device and method for a roller table before flying shears in finishing rolling. Background technique [0002] The delivery of the rolled piece is the basic function required by the production process. The task of tracking and delivery of the hot-rolled strip is to control the speed of each section of the roller table and the rolling mill, as well as its rotation and stop, so that the rolled piece enters from the heating furnace at the fastest speed. The warehouse is sent to the heating furnace, transported to rough rolling, finish rolling and coiling, and processed in each area before being transported out. When the hot-rolled strip is automatically transported and rolled on the roller table, on the one hand, it is hoped to run at a high pace to improve On the other hand, it is necessary to p...

AI Technical Summary

Problems solved by technology

[0005] Most of the finishing rolling production lines of hot rolling mills in the prior art adopt the speed control method of reducing the shear speed to a low shear speed before the speed measuring roll. Although the speed values ​​are slightly different, they are generally between 1.0-1.2m / s, thus As a result, the running time at low speed is longer, which affects the rolling rhythm to a certain extent and reduces the production efficiency

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