Control method for load relay of hot continuous rolling thin-specification rolling frame
A technology of relay control and rolling stand, which is applied in the direction of rolling mill control devices, metal rolling, metal rolling, etc., can solve problems affecting the normal production of rolling lines, economic losses of enterprises, and high no-load pressure, etc. The effect of abnormal signal of load relay, saving failure time and avoiding influence
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Embodiment 1
[0016] Example 1: When the rolling Q235 specification is 1.5mm*1250mm, the no-load pressure of the F5 frame is 500 tons; the no-load pressure of the F6 frame is 650 tons; if the rolling pressure increase reaches 300 tons, the corresponding frame belt The steel head load relay is on. Therefore, when the strip head arrives at the F5 rack, that is, the computer strip head tracking position is equal to 205.5m (the physical position value of the F5 rack + 2 m), the strip head tracking window opens, and the computer scan time is 10 ms , the rack rolling pressure values detected during the two scanning times are 600 tons and 900 tons respectively, and the rolling pressure increase value is 300 tons, so it is judged that the F5 rack load relay is connected; when the strip head reaches the distance F6 When the rack, that is, the computer strip head tracking position is equal to 211m (the physical position value of the F6 rack + 2 m), the strip head tracking window is opened, and the ...
Embodiment 2
[0017] Example 2: When the specification of the rolled container plate is 1.4mm*1250mm, the no-load pressure of the F5 frame is 550 tons; the no-load pressure of the F6 frame is 700 tons; if the rolling pressure drop reaches 300 tons, the corresponding frame Strip tail load relay opens. Therefore, when the strip tail distance leaves the F5 rack, that is, the computer strip tail tracking position is equal to 201.5m (the physical position value of the F5 rack - 2 m), the strip tail tracking window opens, and the computer scan time is 10 ms, twice The rolling pressure values of the racks detected during the scanning time are 1200 tons and 800 tons respectively, and the rolling pressure drop value is 400 tons, so it is judged that the load relay of the F5 rack is disconnected; When the strip tail tracking position value is equal to 207m (the physical position value of the F6 frame - 2 m), the strip tail tracking window is opened, the computer scan time is 10 ms, and the rolling ...
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