Hot-rolled ribbed bar double-length shearing control method

Abstract

The invention discloses a hot-rolled ribbed steel bar double-length shearing control method, and belongs to the technical field of metal smelting, the method adopts a first detector and a second detector, when the head end of a deformed steel bar moves to the first detector, the first detector transmits detected information to a controller, the controller starts timing, and the second detector sends the detected information to the controller; according to a first mathematical model built therein, the time value needed when the head end of the deformed steel bar is moved to the large cooling bed is calculated, the time value is T, when timing reaches T, the double-length shear is controlled to conduct shearing, shearing is conducted circularly in this way until information detected by the second detector disappears, and at the moment, the time value is T; and the controller predicts the lengths of the remaining deformed steel bars according to a second mathematical model established in the controller, and controls the length of the tail section of deformed steel bar within a preset range value after segmented calculation. According to the method, the problem that steel blockage or birdcage punching is easily caused due to the fact that the length of the whole deformed steel bar cannot be pre-judged in existing double-length shearing can be solved.

Description

technical field

[0001] The invention relates to the technical field of metal smelting, in particular to a method for controlling double-length shearing of hot-rolled ribbed steel bars. Background technique

[0002] In the production of hot-rolled ribbed steel bars in iron and steel enterprises, after the billets output from the heating furnace are rolled into rebars by 1-18# rolling mills arranged at intervals along the roller table, they need to be sheared by double-length shears. It can be thrown into a large cooling bed for cooling, and then be output by sizing shears for sizing and segmenting. The existing control method of double-length shearing adopts: a detector for detecting steel tapping information is provided at the output end of the 18# rolling mill, and when the detector detects the steel tapping information, the information is transmitted to the controller, After calculating and processing this information, the controller controls the double-length shears to c...

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