Rolled part temperature obtaining method and device for plate-strip hot-rolling production line
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An acquisition method and production line technology, applied in the field of hot-rolled strips, can solve the problems of inability to quickly and easily adapt to engineering calculation requirements, poor universality of temperature models, and low calculation accuracy.
Active Publication Date: 2020-04-28
WISDRI ENG & RES INC LTD
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[0003]
The object of the present invention is to provide a method and device for obtaining the temperature of rolled pieces in a strip hot-rolling production line to solve the problem of poor versatility and low calculation accuracy of existing rolled piece temperature models, which cannot be quickly and conveniently adapted to engineering projects. Calculation requirements etc.
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Embodiment 2
[0195] In this embodiment, the ESP production line is taken as an example. On the basis of the method described in Example 1, the temperature of the rolled piece in the production process of the ESP production line is calculated, and compared with the actual temperature value on site, to further illustrate the versatility and accuracy of the method of the present invention. sex.
[0196] The ESP process is a thin slab continuous casting and rolling process. The main equipment layout of the rolling section is as follows: Figure 4 As shown, it includes the first heat preservation cover 1, the three-stand rough rolling unit 2, the second heat preservation cover 3, the induction heating furnace 4, the high-pressure water descaling device 5, the five-stand finishing rolling unit 6, and the laminar flow cooling device 7 And coiler 8, the main equipment spacing is: L1=3m, L2=5m, L3=9.5m, L4=14m, L5=26.5m, L6=37m, L7=45.5m, L8=56m, L9=57m , L10=58m, L11=63m, L12=67.5m, L13=72m, L14=...
Embodiment 3
[0212] Such as Figure 8 The device for obtaining the temperature of a rolled piece in a strip hot rolling production line includes:
[0213] The production line construction unit is used to construct the equipment layout of the hot rolling production line and obtain relevant process parameters;
[0214] The heat exchange area division unit is used to divide the heat exchange area of the rolled piece according to the equipment layout on the production line;
[0215] The grid node division unit is used to divide the grid nodes of the width-thickness section of the rolled piece, and establish the coordinate system parameters and temperature calculation model of each node;
[0216] The initial temperature acquisition unit is used to acquire the initial temperature distribution of the rolled piece at the initial calculation position;
[0217] The heat exchange area judgment and calculation unit is used to judge the heat exchange area where the section of the rolled piece is lo...
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Abstract
The invention discloses a rolled part temperature collection method for a plate and strip hot rolling production line, which comprises the following steps of: constructing equipment arrangement of theplate and strip hot rolling production line, and obtaining related process parameters; dividing a rolled part heat exchange area according to equipment arrangement on the production line, wherein theheat exchange area comprises an air cooling area, a water cooling area, a roll gap contact heat conduction area and a heat radiation heat preservation area; dividing width-thickness section grid nodes of the rolled part, and establishing coordinate system parameters and a temperature calculation model of each node; obtaining initial temperature distribution of the rolled part at the initial calculation position; from the initial calculation position to the final calculation position, the heat exchange area where the rolled part section is located is judged firstly when calculation is conducted every time, and then the temperature distribution of the rolled part section at the position is calculated through a corresponding rolled part temperature model. The method has the beneficial effects that the principle is clear and definite, assumption and simplification conditions are few, the temperature field change of the rolled part on the given hot rolling production line can be accuratelyforecasted, and the calculation precision is higher than that of an analytical method.
Description
technical field [0001] The invention belongs to the technical field of hot-rolled strips, and in particular relates to a method and a device for obtaining the temperature of rolled pieces in a hot-rolled strip production line. Background technique [0002] The accurate prediction of the temperature change of the strip during the hot rolling process is an important prerequisite for ensuring the dimensional accuracy, shape quality and microstructure of the strip, and is of great significance for ensuring the stable production of the hot rolled strip: on the one hand, the hot rolling process of the strip is a Very complex heat-mechanical coupling process, including contact heat conduction, natural convection, forced convection, high-temperature heat radiation, internal heat source of deformation and comprehensive heat exchange of frictional heat; the existing rolling stock temperature models mainly include analytical model and finite element method model, Among them, the analyt...
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