Closed-loop cooling control system and control method for hot-rolled rods and wires after rolling

Abstract

The invention discloses an after-rolling closed-loop controlled-cooling system for hot-rolled rods and wires and control method. The method comprises the following steps: 1) utilizing a calculating model to calculate obtained initial data of rolling billets to obtain a controlled-cooling target temperature and controlled-cooling process parameters of a rolled piece; 2) rolling the rolled piece byutilizing determined controlled-cooling process parameters; 3) obtaining a practical temperature of the rolled piece at the outlet of the water tank on line; and 4) if deviation between the temperature and the controlled-cooling target temperature is within a predetermined range, returning to step 2), otherwise, regulating the controlled-cooling process parameters in the step 2 according to the deviation. The calculating model, an online calculating module, an after-calculating self-learning module and the like are tightly matched, so that after-roiling controlled-cooling closed-loop control,which is stable and reliable, is good in real-time property and is easily applied in a production line, on rods such as deformed steel bars is realized, controlled-cooling precision of rolled part products and stability of cleaning rod quality are effectively improved, and green reduction production of rod line products is realized.

Description

technical field [0001] The invention relates to the field of production of hot-rolled rods and wires, in particular to a closed-loop control system and control method for cooling hot-rolled threaded steel bars after rolling. [0002] technical background [0003] Rebar is the most representative building steel and an indispensable structural material in building structures. It is widely used in the construction of houses, bridges, roads and other projects. At present, the degree of urbanization in my country continues to increase, infrastructure construction such as ports and transportation continues to expand, and the real estate market remains stable. In the future, the market's demand for rebar will be stronger, and the performance requirements for rebar will be stricter. Ordinary-strength steel bars, as the main steel material for civil engineering construction, can no longer meet the requirements of construction and development. The promotion and application of high-stre...

AI Technical Summary

Problems solved by technology

Due to the fast rolling speed of threaded steel bars (10-18m / s), this way of obtaining the opening and cooling temperature of the water tank often leads to a serious lag in the calculation results, which leads to the inability of the action response of the water tank to effectively monitor the temperature of the fast-passing threaded steel bars in real time. control

In addition, the published related control methods do not set up an independent module to correct and intervene the process parameters, and the system stability is poor; it also does not take into account the passability of rods and wires and the later data calculation accumulation and self-learning of new product development

Therefore, the published control strategy has high requirements on on-site software and hardware facilities, poor real-time regulation and control, and it is difficult to truly realize it in the production line.

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