System integration technology for dynamic soft reduction of continuously-cast billet

A system integration technology for dynamic soft reduction of a continuously-cast billet belongs to the metallurgical technology field, comprises a dynamic soft reduction and dynamic secondary cooling water distribution software model, an electric automation control system, a hydraulic system and a mechanical device system, etc., and has significant effects on reducing or eliminating internal defects of a cast billet such as center porosity, segregation, etc., and improving the product quality. The dynamic soft reduction and dynamic secondary cooling water distribution two-stage control modelcan adapt to different operating conditions to carry out thermal tracking on a temperature field of the cast billet real timely and accurately, calculate the soft reduction range and the rolling reduction distribution, and set a roll gap value and a secondary cooling water amount dynamically; a first stage automation system can complete the on-site data gathering, process loop control, order control of the electric equipment, surveillance of the running operation of equipment, alarming, etc; the hydraulic system is responsible for uplifting and drop of a straightening machine via a proportional valve, and controls the rolling reduction by employing a displacement transducer to detect and feedback the travel of an oil cylinder; and the straightening machine employs a memorial archway type frame, and is equipped with a drive roller, a driven roller and a hydraulic elevating gear. Therefore, the remote control of the roll gap is realized, with control precision up to 0.1mm.