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Hot continuous rolling impact prompt drop compensation coefficient calculation method and compensation method

A technology of compensation coefficient and calculation method, applied in calculation, metal rolling, metal rolling and other directions, can solve the problems of poor effect and low accuracy of rolling mill speed compensation value, achieve good compensation effect and avoid strip thickness exceeding the standard , The effect of ensuring the quality of hot-rolled products

Active Publication Date: 2022-07-08
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The accuracy of the mill speed compensation value in the existing compensation method is not high, too much or too little compensation will lead to poor results

Method used

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  • Hot continuous rolling impact prompt drop compensation coefficient calculation method and compensation method
  • Hot continuous rolling impact prompt drop compensation coefficient calculation method and compensation method
  • Hot continuous rolling impact prompt drop compensation coefficient calculation method and compensation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] This embodiment provides a calculation method for the impact velocity drop compensation coefficient of hot tandem rolling, and the calculation method includes:

[0031] According to the leading speed coefficient, motor power, motor time constant, roll rotational angular velocity and motor rotational inertia, the impact speed drop compensation coefficient is calculated, and the impact speed drop compensation coefficient function is:

[0032]

[0033] where d rp is the downhill compensation coefficient; v r is the rotational angular velocity of the roll, rad / s; f lead is the leading speed coefficient; p is the motor power, kW; dx is the motor time constant, s; ω K is the moment of inertia of the motor, kg m 2 .

[0034] The calculation method of the hot continuous rolling impact speed drop compensation coefficient of the present embodiment has high accuracy in obtaining the speed drop compensation coefficient;

Embodiment 2

[0036] like figure 1 As shown, the present embodiment provides a method for compensating impact speed drop in hot tandem rolling, in which the method for calculating the impact speed drop compensation coefficient in hot tandem rolling as claimed in claim 1 is used, including:

[0037] S100. Calculate the motor speed; in the process of calculating the motor speed, use the linear speed of the roll before the impact of the strip, the conversion coefficient of the linear speed to the speed, the gear box transmission ratio between the motor and the roll, and the diameter of the roll to calculate the motor speed, The motor speed function is:

[0038]

[0039] Among them, n is the motor speed, r / min; V 0 is the linear velocity of the roll before the impact of the strip, m / s; c ln is the conversion coefficient from linear velocity to rotational speed; c g is the gear box transmission ratio between the motor and the roll; D is the diameter of the roll, mm.

[0040] S200, accordi...

Embodiment 3

[0050] Aiming at the impact speed drop problem of the finishing mill in a hot tandem rolling line of a factory, the impact compensation coefficient d of the final stand F7 was calculated. rp . First, according to the field equipment and process setting data, the following parameters of the F7 stand of the finishing mill are determined: the linear speed of the roll before the impact V 0 =10.46m / s; gear box transmission ratio c g =1; conversion coefficient C from linear velocity to rotational speed ln= 19098.7917, roll diameter D = 665mm.

[0051] The linear speed of the roll before the impact, the conversion coefficient of the linear speed to the rotation speed, the transmission ratio of the gearbox and the diameter of the roll are brought into the motor speed function,

[0052]

[0053] Calculated motor speed n=300.4r / min;

[0054] Bring the motor speed into the roll rotation angular velocity function,

[0055]

[0056] calculate v r =31.5rad / s.

[0057] Then rota...

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Abstract

The invention discloses a hot continuous rolling impact speed drop compensation coefficient calculation method and a compensation method. The speed drop compensation coefficient calculation method comprises the step of calculating an impact speed drop compensation coefficient according to an advanced speed coefficient, motor power, a motor time constant, a roller rotation angular speed and motor rotational inertia. The hot continuous rolling impact speed drop compensation method comprises the steps that the motor rotating speed is obtained through calculation; according to the motor rotating speed, the roller rotating angular speed is calculated; calculating to obtain an impact speed drop compensation coefficient by using an impact speed drop compensation coefficient calculation method; performing amplitude limiting processing on the impact speed drop compensation coefficient; and calculating the compensated roller linear velocity by using the impact prompt drop compensation coefficient and the original roller linear velocity. According to the hot continuous rolling impact prompt drop compensation method, impact prompt drop generated during strip threading and steel biting of a hot continuous rolling unit is effectively compensated, strip steel thickness exceeding caused by the impact prompt drop is avoided, the quality of hot rolling products is guaranteed, the accuracy of the compensated roller linear speed is high, and the compensation effect of the roller linear speed is good.

Description

technical field [0001] The invention relates to the technical fields of metallurgical machinery, automation and rolling, in particular to a calculation method and a compensation method for the impact speed drop compensation coefficient of hot continuous rolling. Background technique [0002] In the process of hot strip rolling, the rolling mill will have an impact speed drop when it bites the steel, that is, the speed of the roll will suddenly decrease under the impact of the strip, which will cause the speed of the rolling mill to fluctuate and the thickness of the strip head to exceed the standard. , In severe cases, it will lead to the phenomenon of steel pulling in an instant. The effective way to solve this problem is to take compensation measures, that is, add a certain compensation value to the speed setting of the rolling mill before the rolling piece bites, and cancel the additional compensation value after the rolling mill bites the steel. The accuracy of the roll...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B28/02G06Q50/04
CPCB21B28/02G06Q50/04Y02P70/10
Inventor 刘超吴冠南何安瑞孙文权邵健姚驰寰吴海瑞
Owner UNIV OF SCI & TECH BEIJING
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