Controlling method of delaying water leakage of pinch roll

Abstract

The invention relates to a controlling method of delaying water leakage of a pinch roll, comprising the steps as follows: (1) when an intermediate blank head of rough rolling incoming materials arrives at a flying shear zone, a photoelectric tube in front of the flying shears is triggered and turned on to transmit the detected signal to BA basic automation, and the flying shears carry out the head cutting according to the shape of the detected intermediate blank head; (2) the pinch roll is controlled by low pressure: after the head of the intermediate blank is cut, the intermediate blank goesinto a de-scaling box 1#pinch roll at a de-scaling roller-way speed; and based on the days of the pinch roll using the computer and low pressure control pressure setting, a BA computer calculates thehead setting pressure according to the formula 1 and then roll gap is pressed until the pressure reaches the set value; (3) the pinch roll is controlled by high pressure: when the tail of the intermediate blank reaches the number 1 photoelectric tube, the pinch roll is controlled by high pressure; and based on the days of the pinch roll using the computer and high pressure control pressure setting, a BA computer calculates the tail setting pressure of the pinch roll according to the formula 2 and then the roller gap is further pressed until the pressure reaches the set value. The invention has the advantages of increased production operation efficiency, reduced fault time, and prolonged using periods of various pinch rolls.

Description

【Technical field】 [0001] The invention relates to the technical field of hot rolling and finishing rolling, in particular to a control method for delaying water leakage of pinch rolls. 【Background technique】 [0002] The main functions of the pinch roll for finishing rolling and descaling are as follows: After the irregular head of the incoming rough rolling blank is cut off by flying, the intermediate blank strip is sent to the descaling box through the middle roller table, and the descaling box Install 1# and 2# pinch rolls, the pinch rolls will bite the head of the strip steel, and then send it to the 2# pinch rolls through pressure and transmission torque, this is the two sets of pinch rolls to smoothly send the strip steel into the rolling mill . During this process, the pinch rolls not only feed the strip into the rolling mill, but also smooth the head shape of the strip, and more importantly, prevent the strip from descaling under high pressure in the descaling box. ...

AI Technical Summary

Problems solved by technology

During this process, the pinch rolls not only send the strip into the rolling mill, but also smooth the shape of the head of the strip, and more importantly, prevent the strip from being descaled by a large amount of steel in the descaling box. Scale water splashes out and affects the detection function of the photoelectric cell. Among these functions, the water blocking function of the pinch roller is the most important. Once the pinch roller leaks a lot of water, the detection environment will be disturbed, and the flying shear cannot accurately measure the shape of the tail of the strip. , Flying shear does not cut the tail, causing the strip to be crushed and tail-flicked between the racks, and in severe cases, it will directly cause scrap steel accidents

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