A Control Method for Coiler Tracking Loss Reconstruction in Hot Rolling Line

Abstract

The invention relates to a control method for preventing lost coiling tracking from causing steel scraps in a hot continuous rolling strip steel production line. The technical scheme comprises the following steps of: A, determining lost tracking of finish-rolling and coiling rolling strip steel; B, ensuring normal speed acceleration of a coiling block and a wrapper roller and steel coiling preparation by a coiler by using a rolling signal of a tracking-free rolling mill as a trigger signal of speed acceleration of a coiler mandrel and the wrapper roller; C, determining whether the strip steelreaches the coiler, when the strip steel reaches the coiler, starting a coiling tracking reconstructing system, and providing normal head and tail tracking signals for each control system of the coiler; and D, determining head and tail positions of the strip steel by integration on the strip steel speed. The invention has the advantages that the lost tracking can be automatically distinguished bya computer system and software thereof, the tracking reconstructing system is automatically started, an accurate tracking signal is provided for the coiler, normal steel coiling of the coiler is realized, and the steel scraps are avoided being coiled to influence normal production. The method has the characteristics of scientificity, applicability and accuracy.

Description

technical field [0001] The invention relates to a control method for preventing scrap steel caused by loss of coiling and tracking in a hot strip steel production line, and belongs to the technical field of steel rolling. Background technique [0002] In the hot rolling production process controlled by Siemens, the finishing rolling and coil tracking are lost due to the strip slipping when it bites into the finishing mill or the deviation between the calculated rolling force of the secondary machine and the actual rolling force is too large. The rolling mill has been set up, and the strip can pass through the finishing mill. However, because the coiler cannot receive the head tracking signal and the loading signal of the finishing mill, the coil and the auxiliary roll do not speed up. The coiler does not prepare for coiling, resulting in coiling Scrap steel affects the qualified rate of products and the normal production of strip steel. Contents of the invention [0003] ...

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Problems solved by technology

[0002] In the hot rolling production process controlled by Siemens, the finishing rolling and coil tracking are lost due to the strip slipping when it bites into the finishing mill or the deviation between the calculated rolling force of the secondary machine and the actual rolling force is too large. The rolling mill has been set up, and the strip can pass through the finishing mill. However, because the coiler cannot receive the head tracking signal and the loading signal of the finishing mill, the coil and the auxiliary roll do not speed up. The coiler does not prepare for coiling, resulting in coiling Scrap steel affects the qualified rate of products and affects the normal production of strip steel

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