Plate blank discharging control method for hot rolled plate production line

Abstract

The invention provides a plate blank discharging control method for a hot rolled plate production line. The sequential control flow of the original control system is re-designed, and the partial sequential control flow is changed to the concurrent control process, that is to say, the simple sequential manner of the design of interfaces between different control systems is changed to the concurrent manner. Therefore, compared with the traditional steel tapping scheme, a larger innovation is made. The mechanical actions of the steel tapping flow is resolved into a plurality of relatively independent execution steps, and the control system is also divided into a plurality of relatively independent control modules, therefore, the sequential control steps are optimized. In addition, according to the plate blank discharging control method for the hot rolled plate production line, the pace of plate blank steel tapping is improved, and the capacity of a rolling mill is also improved; a model control system is triggered in advance, and the model holding time is shortened; the time that a plate blank stays on a roller table is shortened; and the energy is saved, so that the cost for the production process is lowered.

Description

technical field [0001] The invention relates to the field of metallurgical processing, in particular, the invention relates to an automatic control method for tapping of a walking heating furnace. Background technique [0002] The products of the production line of the hot rolling plant are all kinds of special steels, such as titanium coils, etc. Most of them are used in national strategic projects such as national defense and nuclear power. However, there are currently a series of technical problems in the control system of the production line of the hot rolling mill. Among them, including the tapping control of the heating furnace slab. [0003] The current tapping process is mainly realized by PLC (programmable logic controller) to control the opening / closing of the furnace door, the advancing / retreating of the tapping machine and the rising / falling of the tapping machine. [0004] The automatic tapping process usually includes: [0005] 1) Furnace door half-open: Whe...

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Problems solved by technology

[0036] 3. The conveying roller table cannot run

[0037] 4. According to different discharge positions, the corresponding tapping machine frequency converter is not faulty, and there is no "tapping machine encoder failure" alarm; the tapping machine can only work

[0039] 6. The walking beam is in the middle position or below and there is no upward movement;

This article improves the slab positioning system in the heating furnace, improves the tapping rhythm, and greatly reduces the error. However, this article does not involve the optimization of the control system behind the furnace door

[0052] The patent disclosure of the "hanging loading and unloading machine" with the application number "95230169.5" has similarities with the tapping machine of the walking furnace, but it only mentions the design of this unloading machine and does not mention the design of the control system

[0053] In addition, the patent with the application number "95230169.5" and the invention title "A Two-way Walking Beam Steel Coil Transportation Device" has similarities with the tapping machine of the walking furnace, but it is only an improvement in the design of the steel coil transportation device. , also does not mention the control system

[0054] As mentioned above, there are certain defects in the existing tapping technology, that is, although the tapping process can meet the requirements of normal tapping and the system can also operate normally, there is no further consideration for improving the production rhythm and reducing energy consumption. However, This is the general mode of the current heating furnace, and it is also the situation of the common walking heating furnace

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