Forward slip value calculation and rolling speed distribution method in steel strip asynchronous continuous rolling process
A distribution method and rolling speed technology, applied in the field of rolling production, can solve the problem that the speed cannot be preset, and achieve the effect of smooth rolling process and high calculation accuracy
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Embodiment 1
[0146] Take the 2150mm five-raised six-roll-cooled rolling unit as an example, the working roller diameter of the unit is 430 to 570 mm, the intermediate roller diameter is 580 to 650 mm, the support roller diameter is 1325 to 1485 mm, and the maximum rolling force of the unit is 32mn. Calculate the front slid value of each rolling path of DP780 steel and cooling rolling, and set the rack asynchronous cold and rolling rolling speed. Each rolled phase is different from the thickness of the rolling (ie the steel belt inlets used in the rack of the rolling channel). i ), The thickness of the rolling (i.e., the steel belt exit thickness H for the rack of the rolling channel 0 ), Using the front slid value calculated by this patent method, the actual measured front sliding value and the set of each frame rolling speed are shown in Table 1.
[0147] Table 1 Example 1 Speed ratio, thickness of rolling, thickness of rolling, front slip calculation value, front sliding measurement and ro...
Embodiment 2
[0151] Take the 2150mm five-raised six-roll-cooled rolling unit as an example, the working roller diameter of the unit is 430 to 570 mm, the intermediate roller diameter is 580 to 650 mm, the support roller diameter is 1325 to 1485 mm, and the maximum rolling force of the unit is 32mn. Calculate the secondary rolling value of QP980 steel and cold and rolling rolling, and sets the rack asynchronous cold and rolling rolling speed. Each rolling phase is different speed ratio, the thickness of the rolling, the thickness of the rolling, and the front slid value calculated by this patent method, the measured front sliding value, and the set rack rolling speed are shown in Table 2.
[0152] Table 2 Example 2 Speed ratio, thickness of rolling, rolling thickness, front slide calculation value, front sliding measurement, and rolling speed setting
[0153] Rolling 1 2 3 4 5 Speed ratio 1.3 0.77 1.3 0.77 1 Steelband rolling / rolling thickness, mm 3.5 / 2.4 2.4 / 1....
Embodiment 3
[0156] Taking the 2150mm seven-machine frame four-roll heat joint unit as an example, the working roller diameter of the unit is 570 to 750 mm, the support roller diameter is 1300 to 1450 mm, and the maximum rolling force of the unit is 32mn. Computational carbon structural steel (chemical composition is percentage (≤,%): C: 0.20, Si: 0.30, Mn: 0.65, P: 0.045, S: 0.04) Slide of the rolling channels of asynchronous heat Value, and set the rack asynchronous hot-rolling rolling speed. Each rolling phase is different, the thickness of the rolling, the thickness of the rolling, the front slid value calculated by this patent method, the measured front sliding value, and the set rack rolling speed are shown in Table 3.
[0157] Table 3 Example 3 Spectrum ratio, thickness of rolling, thickness, front sliding calculation value, front sliding measurement, and rolling speed setting
[0158] Rolling 1 2 3 4 5 6 7 Speed ratio 1.01 0.99 1.01 0.99 1.01 0.99 1 Steel...
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