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A Online Prediction Method of Steel Plate Temperature Based on PLC

A prediction method, a technology of steel plate temperature, applied in the direction of temperature control, etc., can solve the problems of long calculation period of temperature model, unguaranteed calculation accuracy, and inability to realize high-speed calculation, etc., and achieve the effect of reducing communication links, fast calculation speed and rapid response

Active Publication Date: 2017-04-12
NORTHEASTERN UNIV LIAONING
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Problems solved by technology

[0007] The non-real-time operating system often used in the current computer has a long calculation cycle of the temperature model, which cannot realize high-speed calculation, and the calculation accuracy cannot be guaranteed; in addition, a large amount of data required by the computer temperature model comes from the production site, and the computer needs to communicate with the production control PLC. A large amount of data communication consumes system resources

Method used

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  • A Online Prediction Method of Steel Plate Temperature Based on PLC
  • A Online Prediction Method of Steel Plate Temperature Based on PLC
  • A Online Prediction Method of Steel Plate Temperature Based on PLC

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Embodiment Construction

[0036] An embodiment of the present invention will be further described below in conjunction with the accompanying drawings.

[0037] In the embodiment of the present invention, the steel plate temperature of a 3000mm medium and thick plate production workshop with two racks is selected to be predicted, and the calculation starts from the steel plate coming out of the furnace, and the whole product production process ends when the rolling is completed. The original data and process parameters of the rolled product are as follows:

[0038] ●Steel type: Q345

[0039] ●Blank specification: 230mm×1250mm×2250mm

[0040] ●Finished product size: 16mm×1750mm

[0041] ●Baking temperature: 1180℃

[0042] ●Rolling mill stiffness: 6500kN / mm

[0043] ●Zero rolling force: 20000kN

[0044] The rolling schedule is shown in Table 1, which includes 8 passes for rough rolling and 6 passes for finish rolling. Some rolling passes need to be descaled to remove the oxide scale on the surface of ...

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Abstract

The invention discloses a PLC-based online predication method for the temperatures of steel plates, and belongs to the field of rolling. According to the invention, an online predication model with regard to the temperatures of the steel plates is directly embedded in a PLC, and capable of realizing high-speed computation, thus the requirements of computation accuracy are met; and data needed for the computation of the temperature model is directly obtained from the PLC, thus communication links are reduced, a computation result can provide temperature predication data for a process model, that is, the characteristics of fast computation speed, high accuracy and rapid response are achieved, and temperature distribution in a thickness direction of each steel plate is obtained in real time, thus important practical significance is revealed in stable implementation for a rolling process, optimization for rolling schedule guidance and parameter self-learning for a process control model.

Description

technical field [0001] The invention belongs to the field of rolling, and in particular relates to a method for online prediction of steel plate temperature based on PLC. Background technique [0002] With the wide application of advanced computer and control technology in rolling, users have increasingly strict requirements on product size, quality and performance; for steel plate rolling, the control of steel plate temperature is very important, and temperature determines The deformation resistance of the metal is sensitive to the mechanical parameters such as rolling force, torque, and power, and affects the thickness accuracy, shape, and surface state of the finished product; at the same time, the temperature is also a factor for recrystallization, phase transformation, and precipitation of the steel plate. An important condition for the change of microstructure, the control accuracy of the temperature of the steel plate determines the structure and performance of the ro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/74
CPCB21B37/74
Inventor 何纯玉矫志杰王源源王君赵忠李建平
Owner NORTHEASTERN UNIV LIAONING
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