CN116159868A

CN116159868A - Eighteen-roller machine side supporting force energy control method based on edge drop control

Info

Publication number: CN116159868A
Application number: CN202310089246.XA
Authority: CN
Inventors: 孙文权; 刘洋; 杨庭松; 何安瑞; 刘超; 荆丰伟; 宋勇
Original assignee: University of Science and Technology Beijing USTB
Current assignee: University of Science and Technology Beijing USTB
Priority date: 2023-02-09
Filing date: 2023-02-09
Publication date: 2023-05-26
Anticipated expiration: 2043-02-09
Also published as: CN116159868B

Abstract

The invention discloses an eighteen-roller mill side supporting force energy control method based on edge drop control, and belongs to the technical field of multi-roller mill control. The method relies on a eighteen-roller rolling mill platform with side supporting force-position measuring and controlling functions, and comprises a displacement calibrating link with working roller eccentric detection and callback and a side supporting roller system force control link with side drop control capability. According to the invention, the side support roller pressure oil cylinders are arranged at the bearing seats of the side support roller systems, the deflection control function of the side support roller systems is fully exerted through hydraulic adjustment, the effect of applying non-uniform side support force to the working rollers of the eighteen-roller rolling mill is realized, and finally, the fine adjustment of the edge region of the roller seam is achieved. The control method has universality, can be used for carrying out small-range equipment transformation on the existing eighteen-roller rolling mill, and can be used for adjusting the side supporting force energy state according to process data detection, so that the edge drop state of rolled pieces of the eighteen-roller rolling mill is effectively improved.

Description

Eighteen-roller machine side supporting force energy control method based on edge drop control

Technical Field

The invention belongs to the technical field of multi-roller mill control, and particularly relates to an eighteen-roller mill side supporting force energy control method based on edge drop control.

Background

Because the thin strip and the ultrathin strip steel have the characteristics of large width-thickness ratio and the like, the thin strip steel has higher added value of products, and is widely applied to various fields of aerospace, automobiles, ships and the like. However, the large aspect ratio also makes the process window of the product small, and the product is extremely easy to form serious work hardening in the processing process, so that the product is difficult to be further thinned. The eighty-eight rolling mill is provided with smaller working rolls, and can finish rolling production of thin strips (including ultrathin strips) under the support of a tower type roller system, so that the eighty-eight rolling mill becomes a main machine type for producing thin strips and ultrathin strip products at present. The eighty-eight rolling mill is required to ensure that the same plate difference of the rolled plate strip is accurately reduced on the basis of no plate shape problem of the produced thin strip, namely the rectangular section control of the strip steel production flow is realized.

To achieve this control objective, the solutions proposed in the industry can be categorized into two main categories, namely, a plate-shape mechanism control method and a novel roll shape design method. The regulation and control method of the plate-shaped mechanism is used for dynamically regulating the roll gap of the eighteen-roll mill by virtue of control methods such as bending, channeling and the like, and the roll gap is promoted to be towards a rectangular section by changing the deflection of the roll and improving the length of a harmful contact area between the rolls. The novel roll shape design rule is to improve the contact area length between the rolls or the idle roll gap state by developing double taper and single taper roll shapes by means of the roll shape design and optimization of the middle roll and the working roll, so as to obtain a rectangular section. The method has good application effect, but the plate-shaped mechanism regulation method needs to drive an external control device to force the roller to deform, and the application of the method can aggravate the roller abrasion and bring a larger burden to the roller bearing. The novel roll shape design method solves the problem that the section of the plate and the strip is not rectangular fundamentally, but also is difficult to realize the design target of 'a roll shape corresponding to a full gauge product'.

The tower type roller system in the eighty-eight roller mill relates to a middle roller system and two side auxiliary roller systems, and the cooperative control of the three roller systems is not only a control difficulty of the machine set, but also an effective gain of the machine set, which is different from other machine sets. The side backup roll system has potential side drop control function, and a tenth-eighth roll mill side drop control strategy and method based on the side roll system are needed.

Disclosure of Invention

The invention provides an eighteen-rolling-mill side supporting force control method based on edge drop control. The method can independently adjust the force energy state of each side support roller system by branches according to the plate convexity and edge drop value change conditions before and after rolling for each rolling pass on the eighteen rolling mill with the roller systems integrally calibrated and positioned, so as to change the bearing roller shape of the working roller to enhance the edge drop adjustment and control capability of the eighteen rolling mill.

In order to solve the technical problems, the invention provides the following technical scheme:

the method comprises the following steps:

s1, arranging a eighteen-roller mill platform with a side supporting force-position measuring and controlling function; in particular, the method comprises the steps of,

the platform comprises a rolling mill main body device and a detection device;

the rolling mill main body device comprises a left coiling, a left guide roller, a eighteen-roller rolling mill, a right guide roller and a right coiling;

The detection device comprises a left convexity meter, a right convexity meter, a displacement sensor group and a pressure sensor group;

the displacement sensor group comprises an upper left support roller system displacement sensor group, an upper right support roller system displacement sensor group, a lower left support roller system displacement sensor group, a lower right support roller system displacement sensor group, an upper working roller displacement sensor group and a lower working roller displacement sensor group;

the pressure sensor group comprises a left upper side supporting roller system pressure sensor group, a right upper side supporting roller system pressure sensor group, a left lower side supporting roller system pressure sensor group and a right lower side supporting roller system pressure sensor group;

the left convexity meter is arranged between the left guide roller and the eighteen roller mill;

the right convexity meter is arranged between the right guide roller and the eighteen roller mill;

s2, performing eccentric detection and callback displacement calibration on the working roller; specifically, the method comprises the following steps:

s21, before rolling starts, performing rolling operation to a zero roll gap state aiming at a eighteen-roll mill, and performing zero clearing on each level of sensors;

s22, performing rolling, and collecting horizontal displacement signals I of two displacement sensors on the transmission side of the upper working roll _UDX-1 、I _UDX-2 Horizontal displacement signals I of two displacement sensors at the operation side of upper working roll _UWX-1 、I _UWX-2 Plumb displacement signals I of two displacement sensors at transmission side of upper working roll _UDY-1 、I _UDY-2 Plumb displacement signals I of two displacement sensors at the operation side of upper working roll _UWY-1 、I _UWY-2 The method comprises the steps of carrying out a first treatment on the surface of the Horizontal displacement signals I of two displacement sensors on transmission side of lower working roll _DDX-1 、I _DDX-2 Horizontal displacement signals I of two displacement sensors at the operation side of lower working roll _DWX-1 、I _DWX-2 Plumb displacement signals I of two displacement sensors at transmission side of lower working roll _DDY-1 、I _DDY-2 Plumb displacement signals I of two displacement sensors at operation side of lower working roll _DWY-1 、I _DWY-2 And performing signal analysis;

s23, the displacement X obtained by S2 analysis _W And Y _W The eccentric angle alpha is used for retracting the working roll;

setting working roll stabilizing conditions:

|X _W |≤ΔX,|X _D |≤ΔX，|Y _W |＝|Y _D |≤ΔY

wherein DeltaX is a calibration value, and 2 mu m is taken; delta Y is a calibration value, and 2 mu m is taken;

the method comprises the steps that a transmission side first oil cylinder and an operation side first oil cylinder of a left support roller and a right support roller are utilized to control the oil cylinders to move in corresponding directions, the numerical value of a working roller displacement sensor is observed at any time, and callback is successful when the measured numerical value meets the working roller stability condition;

s3, controlling the force of the side support roller system; specifically, the method comprises the following steps:

s31, before rolling starts, setting the steel coil A to be rolled for N times, wherein the rolling reduction rate of the first pass is N1, the rolling reduction rate of the second pass is N2, and the rolling reduction rate of the nth pass is Nn;

And the rolling reduction is satisfied

Starting rolling, monitoring the transmission side and operation side reduction values of the incoming material and the rolled plate and strip in real time, and recording the transmission side reduction value of the incoming material as C in the first rolling process _d-i The side drop value of the incoming material operation is C _w-i The reduction value of the transmission side after rolling is C _d-o The side drop value after rolling is C _w-o Setting the final target edge drop value of the transmission side as C _d The final target edge drop value of the operation side is C _w ；

S32, arranging pressure sensors on two side support roller systems of the eighteen-roller single-frame reversible rolling mill, wherein the pressure sensors comprise horizontal pressure sensors and vertical pressure sensors;

the horizontal pressure sensors are arranged at the positions of the roller diameter bearings of the inlet side and outlet side supporting rollers which are one-layer rollers in the horizontal direction, and are used for collecting inlet transmission side horizontal pressure values Fi-d-R, inlet operation side horizontal pressure values Fi-c-R, outlet transmission side horizontal pressure values Fo-d-R and outlet operation side horizontal pressure values Fo-c-R;

the vertical pressure sensors are arranged at the positions of the roller diameter bearings of the inlet side and outlet side supporting rollers which are one-layer rollers in the vertical direction, and are used for collecting inlet transmission side vertical pressure values Fi-d-H, inlet operation side vertical pressure values Fi-c-H, outlet transmission side vertical pressure values Fo-d-H and outlet operation side vertical pressure values Fo-c-H;

S33, setting the same plate difference C on the transmission side _40-D 、C _30-D 、C _25-D Difference of same plate C on operation side _40-W 、C _30-W 、C _25-W The plate thickness T and the plate width W, and the same plate difference level of the hot rolling feed meets the following conditions as being qualified:

|C _x-D -C _x-W |≤C ₁

wherein x is 40, 30, 25 respectively; c (C) ₁ For calibration, generally 5 μm is taken;

C ₄₀ represents the thickness at the center of the strip minus the thickness at 40 μm from the edge of the strip, C ₃₀ Represents the thickness at the center of the strip minus the thickness at 30 μm from the edge of the strip, C ₂₅ A value obtained by subtracting the thickness of 25 μm from the edge of the plate belt from the thickness of the center of the plate belt, D represents the transmission side, and W represents the operation side;

s34, carrying out the same plate difference state pre-judgment according to the measured value;

measuring the same plate difference C of the transmission side after rolling _40-D ,C _30-D ,C _25-D Common plate difference C on operation side _40-W ,C _30-W ,C _25-W ；

If |C _x-D -C _x-W |≤C ₁ ，x∈[40，30，25]Is called C _x The same plate difference is symmetrical;

if |C _X-D -C _X-W |＞C ₁ ，x∈[40，30，25]Is called C _x The same plate difference is asymmetric;

s35, regulating and controlling the detection result of the S34;

the displacement of all the oil cylinders of the side support rollers is controlled by a PID system, the side support rollers are regulated to preset rolling positions in the rolling process, and the control precision L of the oil cylinders is manually controlled on an operating platform _min =0.1 mm, the displacement of the cylinder in one adjustment is specified to be not more than L _max When the displacement L of the oil cylinder is=0.5 mm, stopping regulation and control, continuing data acquisition, and continuing regulation and control after feedback has no data deviation;

S36, checking and recording the horizontal displacement X of the operation side of the working roller again _W Horizontal displacement X of driving side of working roll _D Vertical displacement Y of operation side of working roll _w And the vertical displacement Y of the transmission side of the working roll _D The method comprises the steps of carrying out a first treatment on the surface of the Set to shift rightward and shift upward to be positiveThe method comprises the steps of carrying out a first treatment on the surface of the The stabilizing conditions are as follows:

|X _W |≤ΔX,|X _D |≤ΔX,|Y _W |＝|Y _D |≤ΔY

ensuring that the working roller meets stable conditions;

s37, checking again and recording the reduction value C of the transmission side after rolling _d-o Reduction C of operation side after rolling _w-o The method comprises the steps of carrying out a first treatment on the surface of the When the detected edge drop value meets the following two formulas, the pass edge drop value is called to reach the standard:

C _w-o ≤(C _w -C _w-i )*Nx

C _d-o ≤(C _d -C _d-i )*Nx

where Nx is the X-th pass reduction rate.

Each displacement sensor group in the S1 adopts a configuration form of a group of two detection elements, and the two detection elements are respectively positioned at the end part position of the operation side and the end part position of the transmission side; each detection element of the side support position consists of two displacement sensors, including a side support horizontal displacement sensor and a side support vertical displacement sensor; the detection elements of the upper working roller and the lower working roller are composed of four displacement sensors which are respectively arranged in the roller radial horizontal direction and the roller radial vertical direction of the transmission side and the operation side of the working roller.

Each pressure sensor group in the S1 adopts a configuration form of a group of two detection elements, and the two detection elements are respectively positioned at the lower sides of the side support hydraulic cylinders at the operation side and the transmission side; the detection element of each position consists of two pressure sensors, including a side support horizontal pressure sensor and a side support plumb pressure sensor.

The signal analysis in S22 specifically includes:

s221, calculating the eccentricity of the transmission side and the operation side of the upper working roller and the lower working roller;

2 sensors are arranged on each side of the working roller, and the horizontal displacement of the working roller

Lead 12 vertical 2 shift->

=expressed as the mean of y1 two 2y 2 sensor signals:

wherein x is ₁ 、x ₂ Horizontal displacement signals of two displacement sensors on each side of the working roller, y ₁ 、y ₂ Plumb displacement signals of two displacement sensors at each side of the working roll respectively;

s222, calculating an eccentric angle alpha:

wherein: x is X _W For horizontal displacement of the operating side of the work rolls, X _D For horizontal displacement of the driving side of the working rolls, Y _W Is the vertical displacement of the operation side of the working roll.

In S31, the uncoiling and coiling stage and the head and tail rolling stage collect and record the drop values of each side without control.

The pre-judging process in S34 specifically includes the following steps:

s341, if all the C40, C30 and C25 are symmetrical with the plate difference, the plates at the two sides of the operation side and the transmission side are uniformly stressed in the rolling process, the symmetry of the transverse thickness of the plates is well controlled, and in the follow-up regulation and control, all the cylinders of the left side roller and the right side roller are synchronously regulated, so that the consistency of the roller gap of the operation side and the transmission side is improved, and the thickness of the plate strip at the operation side and the transmission side is changed in a consistent manner after rolling;

S342, if all the same plate differences of the C40, the C30 and the C25 are asymmetric, uneven stress on the operation side and the transmission side of the working roll causes uneven stress on the plates on the two sides of the operation side and the transmission side in the rolling process, poor control of the transverse thickness symmetry of the plates, and in subsequent regulation and control, all the cylinders of the left side roller and the right side roller are respectively regulated, real-time data are detected until all the same plate differences of the C40, the C30 and the C25 are symmetric;

s343, if the conditions that a plurality of same plate differences are symmetrical and a plurality of same plate differences are asymmetrical among C40, C30 and C25 occur, continuing to acquire data, if the subsequent same plate difference asymmetry phenomenon disappears, performing according to the step S341, and if the subsequent same plate difference symmetry phenomenon disappears, performing according to the step S342; if there are still several cases of symmetry with plate differences and several asymmetry with plate differences, then:

a. if the C40 and the C30 and the C25 are symmetrical, respectively adjusting all cylinders of the left roller and the right roller in subsequent regulation and control, and detecting real-time data until all C40, C30 and C25 meet the symmetry condition;

b. if the C40 and C30 identical plate differences are symmetrical, the C25 identical plate differences are asymmetrical, in the subsequent regulation and control, the first oil cylinders on the operation side and the transmission side of the left roller and the right roller are required to be respectively regulated, and real-time data are detected until all the C40, the C30 and the C25 meet the symmetrical conditions;

c. If the C40 and C25 identical plate differences are symmetrical, the C30 identical plate differences are asymmetrical, in the subsequent regulation and control, the second oil cylinders on the operation side and the transmission side of the left roller and the right roller are required to be respectively regulated, and real-time data are detected until all the C40, the C30 and the C25 meet the symmetrical conditions;

d. if the C25 and the plate difference are symmetrical, the C30 and the C40 and the plate difference are asymmetrical, in the subsequent regulation and control, the second oil cylinders on the operation side and the transmission side of the left roller and the right roller are required to be respectively regulated, and real-time data are detected until all the C40, the C30 and the C25 meet the symmetrical conditions;

e. if the C30 and C25 identical plate differences are symmetrical, the C40 identical plate differences are asymmetrical, in the subsequent regulation and control, the second oil cylinders on the operation side and the transmission side of the left roller and the right roller are required to be respectively regulated, and real-time data are detected until all the C40, the C30 and the C25 meet the symmetrical conditions;

f. if the C30 and the C40 and the C25 are symmetrical and the C25 are asymmetrical, the rolling mill is considered to be faulty, and the rolling is stopped immediately after the rolling of the coil steel is finished, and the rolling mill is overhauled.

The step S36 specifically includes:

s361, if |X _W |≥ΔX,|X _D |≥ΔX,|Y _W |＝|Y _D The I is less than or equal to delta Y, which means that in the rolling process, the working rolls are transversely shifted again to push and adjust the first oil cylinder at the upper right operation side, the first oil cylinder at the upper left transmission side and the first oil cylinder at the upper right transmission side until the numerical value of the displacement sensor meets the stable condition;

S362, if |X _W |≥ΔX,|X _D |≥ΔX,|Y _W |＝|Y _D The I is more than or equal to DeltaY, which means that during the rolling process, the eccentric displacement of the working roll occurs, the eccentric angle alpha is calculated, if the working roll deviates to the right, the pressing angle of the right supporting roll is adjusted to be consistent with the alpha, the first oil cylinder at the upper right operating side and the first oil cylinder at the upper right transmission side are slowly pushed forward, and the adjustment is continued until the value of the displacement sensor meets the stable condition;

s363, if |X _W |≤ΔX,|X _D |≤ΔX,|Y _W |＝|Y _D And the I is less than or equal to delta Y, and the stable condition is met, and the operation is continued.

The above mentioned related cylinders are arranged as follows:

the center line of the first oil cylinder on the operation side is vertical to the center line of the side supporting roller and is 232-235 mm away from the operation side edge part of the side supporting roller;

the center line of the second oil cylinder on the operation side is vertical to the center line of the side supporting roller and is 432-435 mm away from the operation side edge part of the side supporting roller;

the center line of the first oil cylinder on the transmission side is vertical to the center line of the side supporting roller and is 232-235 mm away from the transmission side edge part of the side supporting roller;

the center line of the second oil cylinder on the transmission side is vertical to the center line of the side supporting roller and is 432-435 mm away from the transmission side edge part of the side supporting roller.

The left side and the right side of the side supporting roller are symmetrically arranged.

Compared with the prior art, the technical scheme of the invention has the beneficial effects that:

the side supporting roller is utilized to adjust the edge drop of the plate strip, the plate strip is suitable for all types of plate strips, the adjusting process is simple, the edge rolling adjustment can be realized, and the plate strip has obvious effect in the multi-pass rolling process of the plate strip. The whole control process forms a closed loop and can be covered in the whole process of rolling the plate and the strip.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a process flow diagram of an eighteen-rolling mill side support force energy control method based on edge drop control of the present invention;

FIG. 2 is a schematic illustration of the mechanism layout of the eighteen roller mill of the present invention;

FIG. 3 is a schematic view of an eighteen-roll mill side backup roll of the present invention;

FIG. 4 is a schematic view of the operating side of the work rolls on the eighteen roll mill of the present invention;

FIG. 5 is a schematic illustration of the eccentricity of a work roll of a eighteen roll mill according to an embodiment of the invention.

Wherein: 1-left curl; 2-left guide roller; 3-left convexity meter; 4-eighteen rolling mills; 5-right convexity meter; 6-right guide roller; 7-right curl; 8-an upper left operation side first cylinder; 9-an upper left operation side second cylinder; 10-a second oil cylinder at the upper left transmission side; 11-an upper left transmission side first oil cylinder;

4-1, a side support plumb displacement sensor; 4-2, a side support horizontal displacement sensor; 4-3, a side support plumb pressure sensor; 4-4, a side support horizontal pressure sensor; 4-5, a first vertical displacement sensor at the operation side of the upper working roll; 4-6, a second vertical displacement sensor at the operation side of the upper working roll; 4-7, a first horizontal displacement sensor at the operation side of the upper working roll; 4-8, a horizontal displacement sensor II at the operation side of the upper working roller.

Detailed Description

In order to make the technical problems, technical solutions and advantages to be solved more apparent, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.

The invention provides an eighteen-rolling-mill side supporting force control method based on edge drop control.

As shown in fig. 1, the method comprises the steps of:

as shown in fig. 2, the platform comprises a rolling mill main body device and a detection device;

the rolling mill main body device comprises a left coiling 1, a left guide roller 2, a eighteen-roller rolling mill 4, a right guide roller 6 and a right coiling 7;

the detection device comprises a left convexity meter 3, a right convexity meter 5, a displacement sensor group and a pressure sensor group;

The left convexity meter 3 is arranged between the left guide roller 2 and the eighteen roller mill 4 and is used for measuring the edge drop value of the left through plate;

the right convexity meter 5 is arranged between the right guide roller 6 and the eighteen roller mill 4 and is used for measuring the edge drop value of the right through plate;

s22, performing rolling, and collecting horizontal displacement signals I of two displacement sensors on the transmission side of the upper working roll _UDX-1 、I _UDX-2 Horizontal displacement signals I of two displacement sensors at the operation side of upper working roll _UWX-1 、I _UWX-2 Two displacement sensors on the upper working roll driving sidePlumb displacement signal I of device _UDY-1 、I _UDY-2 Plumb displacement signals I of two displacement sensors at the operation side of upper working roll _UWY-1 、I _UWY-2 The method comprises the steps of carrying out a first treatment on the surface of the Horizontal displacement signals I of two displacement sensors on transmission side of lower working roll _DDX-1 、I _DDX-2 Horizontal displacement signals I of two displacement sensors at the operation side of lower working roll _DWX-1 、I _DWX-2 Plumb displacement signals I of two displacement sensors at transmission side of lower working roll _DDY-1 、I _DDY-2 Plumb displacement signals I of two displacement sensors at operation side of lower working roll _DWY-1 、I _DWY-2 And performing signal analysis; in particular, the method comprises the steps of,

Calculating the eccentricity of the transmission side and the operation side of the upper working roller and the lower working roller;

=lead 12 vertical 2 shift->

=expressed as the mean of y1 two 2y 2 sensor signals:

the following description will be made taking the above work roll as an example:

as shown in fig. 5, a point a on the transmission side of the upper working roll is taken, and the upper working roll is shifted to the position A'; taking a point B on the operation side of the working roll to the position B'; and taking a point C of the axis of the operation side of the upper working roll, and shifting the upper working roll to the C' position. The movement of the upper working roll is divided into 2 parts, one part is horizontal rotation displacement of the upper working roll, and the other part is eccentric displacement of the upper working roll. The displacement direction of the sensor is set to be the right direction.

When the upper working roller horizontally and horizontally rotates, the displacement in the vertical direction is 0, namely y _A-A' ＝0,y _B-B' ＝0,x _A-A' ＝x ₁ ，x _B-B' ＝-x ₁ ，

When the upper working roller moves eccentrically, x _C-C' ＝x ₂ ，y _C-C' ＝Y _W

So the sensor finally measures X _W ＝x ₂ -x ₁ ,X _D ＝x ₂ +x ₁ ,Y _W ＝Y _D

The method can obtain:

The lower working roll is the same.

in the actual production process, the displacement X _W And Y _W Are all small in micron-scale, and the stable condition of the working roller is set:

|X _W |≤ΔX,|X _D |≤ΔX,|Y _W |＝|Y _D |≤ΔY

the callback means that the first oil cylinders on the transmission side and the first oil cylinders on the operation side of the left support roller and the right support roller are utilized to control the oil cylinders to move in the corresponding directions, the numerical value of the displacement sensor is observed at any time, and the callback is successful when the measured numerical value meets the stability condition of the working roller;

and the rolling reduction is satisfied

The eighteen-roller single-stand rolling mill is in an unstable rolling state in the uncoiling and coiling stage, so that the values of all sides are collected and recorded without control; the eighteen-roller single-stand rolling mill is in a variable speed control state and mainly performs thickness control, so that the edge drop value is acquired and recorded without control;

the vertical pressure sensors are arranged at the positions of the inlet side and the outlet side of the side supporting roller which is a layer of roller in the vertical direction of the roller diameter bearing, and are used for collecting inlet transmission side vertical pressure values Fi-d-H, inlet operation side vertical pressure values Fi-c-H, outlet transmission side vertical pressure values Fo-d-H and outlet operation side vertical pressure values Fo-c-H;

|C _x-D -C _x-W |≤C ₁

in particular, the method comprises the steps of,

s341, if all C40, C30 and C25 meet the symmetry condition, the plates on two sides of the operation side and the transmission side are uniformly stressed in the rolling process, the symmetry control of the transverse thickness of the plates is good, and in the follow-up regulation and control, all cylinders of the left side roller and the right side roller are synchronously regulated, so that the consistency of the roller gap of the operation side and the transmission side is improved, and the thickness of the plate and the strip of the operation side and the transmission side are changed in a consistent manner after rolling.

S342, if all C40, C30 and C25 do not meet the symmetry condition, the problem that the plates at the two sides of the operation side and the transmission side are stressed unevenly in the rolling process due to uneven stress of the operation side and the transmission side of the working roller is obtained, and in the follow-up regulation and control, all cylinders of the left side roller and the right side roller are required to be respectively regulated, real-time data are detected until all C40, C30 and C25 meet the symmetry condition;

s343, if the conditions of symmetry and asymmetry among C40, C30 and C25 occur, firstly determining whether the detection device has a problem or not, so that regulation is not performed first, and data acquisition is continued; after subsequent detection, if the asymmetry disappears, the steps are carried out according to the steps; if the asymmetry does not disappear, the following 6 cases occur.

a. If C40 is symmetrical, C30 and C25 are asymmetrical, presumably due to the deflection of the strip during rolling due to work roll bending, resulting in |C _40-D -C _40-W The result of the i is very close to the critical value C1, and since the C40 position is closer to the middle of the strip, the effect of such rolling force deviation is minimal, and the symmetrical state with the strip difference can be maintained temporarily. C30 and C25 are closer to the edge of the plate than C40, are greatly affected by the deviation of the rolling force, and have the same plate difference asymmetry. In the subsequent regulation, all the cylinders of the left and right side rollers need to be respectively regulated, real-time data are detected until all C40, C30 and C25 meet the symmetry condition, and the state of S341 is returned.

b. If C40 and C30 are symmetrical and C25 is asymmetrical, the deviation of rolling force just occurs in the rolling process of the plate and strip due to the bending roll of the working roll, and only the identical plate difference symmetry of the edge part of the strip steel, namely C25, can be influenced, but the identical plate difference value |C of C30 and C25 _30-D -C _30-W I and C _25-D -C _25-W I has also approached the threshold C1. In the subsequent regulation, the first cylinders on the operation side and the transmission side of the left roller and the right roller are required to be respectively regulated, real-time data are detected until all of C40, C30 and C25 meet the symmetry condition, and the state of S341 is returned.

c. If C40 and C25 are symmetrical and C30 is asymmetrical, analysis shows that the C25 near the edge of the plate belt and the C40 near the middle of the plate belt are symmetrical, which means that the stress of the plate belt in the large direction is uniform, the same plate difference of C25 is caused by uneven stress of a small range of a working roller, and presumably caused by uneven pressure application of a second cylinder 9 on the operation side of the side support upper left roller and a second cylinder 10 on the transmission side upper left. In the subsequent regulation, the second cylinders on the operation side and the transmission side of the left roller and the right roller are required to be respectively regulated, real-time data are detected until all of C40, C30 and C25 meet the symmetry condition, and the state of S341 is returned.

d. If C25 is symmetrical, C30 and C40 are asymmetrical, analysis shows that the C25 near the edge of the plate belt is symmetrical with the plate difference, and the C30 and C40 near the middle are asymmetrical due to uneven pressure application of the second cylinder on the operating side and the second cylinder on the transmission side of the side supporting roller. In the subsequent regulation, the second cylinders on the operation side and the transmission side of the left roller and the right roller are required to be respectively regulated, real-time data are detected until all of C40, C30 and C25 meet the symmetry condition, and the state of S341 is returned.

e. If C30 and C25 are symmetrical, C40 is asymmetrical, analysis shows that C30 and C25 near the edge of the plate and the strip are symmetrical, and C40 near the middle is asymmetrical due to uneven pressure application of the second cylinder on the operating side of the side support roller and the second cylinder on the transmission side. In the subsequent regulation, the second cylinders on the operation side and the transmission side of the left roller and the right roller are required to be respectively regulated, real-time data are detected until all of C40, C30 and C25 meet the symmetry condition, and the state of S341 is returned.

f. If C30 is symmetrical and C40 and C25 are asymmetrical, the rolling mill is considered to be faulty, and the rolling is stopped immediately after the rolling of the coil steel is finished, and the rolling mill is overhauled.

S35, regulating and controlling the detection result of the S34;

the displacement of all the oil cylinders of the side support rollers is controlled by a PID system, the side support rollers are regulated to preset rolling positions in the rolling process, and the control precision L of the oil cylinders is manually controlled on an operating platform _min =0.1 mm, defining cylinder in one adjustmentDisplacement is not more than L _max When the displacement L of the oil cylinder is=0.5 mm, stopping regulation and control, continuing data acquisition, and continuing regulation and control after feedback has no data deviation;

in particular, the method comprises the steps of,

s351, if all of C40, C30 and C25 meet the symmetry condition, the stress on the left side and the right side of the working roller is uniform, so that the operation side and the transmission side should be synchronously adjusted when the left side and the right side supporting oil cylinders are adjusted. The method is characterized in that the side part of the side supporting roller is stressed and deflected by pushing the second oil cylinder at the transmission side and the second oil cylinder at the operation side to move, thereby forming the effects of concave stress position and lifting side part, the edge of the working roll is directly reduced by pressure from the side support, the roll gap of the edge is improved, the corresponding reduction of rolling force of the edge of the strip steel during rolling can be judged, and the problem of edge drop of the strip steel is improved.

The displacement L of the second oil cylinder at each time ₂ ＝L _min Because the side support roller is positioned at the rolling position in the current plate and strip rolling process and the same plate difference performance of the plate and strip is good, the extra force applied to the side support roller can destroy the current rolling balance, and the requirement is that whether the edge drop values of the operation side and the transmission side of the rolled plate are improved and whether the same plate difference is balanced or not is monitored in real time after the oil cylinders are regulated each time, and a small amount of oil cylinders are regulated for many times under the premise of ensuring the rolling balance.

S352, if all of C40, C30 and C25 are out of symmetry conditions. The fact that the stress on two sides of the working roller is uneven at present is explained, so that asymmetric adjustment is needed when the side supporting roller is adjusted. If the common plate difference on the operating side is smaller than that on the transmission side, i.e. C _40-W ＜C _40-D . Because the position of the first oil cylinder is close to the edge part, the position of the second oil cylinder is close to the middle part, when the same plate difference of the three positions is not in accordance with the symmetrical condition, the adjustment of the second oil cylinder has larger influence on the same plate difference of the three positions, so the adjustment of the second oil cylinder is taken as the main, and the position fluctuation of the oil cylinder meets the requirement of L _W-2 ＝L _D-2 ＝3L _min The method comprises the steps of carrying out a first treatment on the surface of the The first oil cylinder is in charge of fine adjustment, and the position fluctuation quantity of the oil cylinder meets L _W-1 ＝L _D-1 ≤2L _min 。

The specific adjusting method is that the second oil cylinder at the operation side is pulled back first to push the second oil cylinder at the transmission side. And monitoring the numerical value change of the C40 and the C30 in real time, stopping adjusting the second oil cylinder when the C40 and the C30 meet or are extremely close to the balance condition, starting to pull back the first oil cylinder at the operation side, and pushing the first oil cylinder at the transmission side. That is, the side supporting force on the side with smaller difference between the same plates is reduced, the side supporting force on the side with larger difference between the same plates is increased, and the changes in the same plate differences C40, C30, and C25 are observed until the state is adjusted to S341.

S353, if C40 symmetry occurs, C30 and C25 are asymmetric. Because the adjustment of the first oil cylinder has larger influence on the same plate difference when the side part C25 and the middle part C30 do not meet the symmetrical condition, the first oil cylinder is taken as the main part in the adjustment process, and the position fluctuation quantity of the oil cylinder meets L _W-1 ＝L _D-1 ＝3L _min The method comprises the steps of carrying out a first treatment on the surface of the The second oil cylinder is used as an auxiliary, the position fluctuation quantity of the oil cylinder is satisfied, L _W-2 ＝L _D-2 ≤2L _min 。

In the case of large difference between the transmission side and the plate, i.e. C _30-D ＞C _30-W ，C _25-D ＞C _25-W An example is described. The specific adjusting method is that the first oil cylinder at the transmission side is pushed in, and the first oil cylinder at the operation side is slowly pulled back. And monitoring the numerical value changes of C30 and C25 in real time, stopping adjusting the first oil cylinder when the C30 meets or approaches to the balance condition, starting to pull back the second oil cylinder at the operation side, and pushing the second oil cylinder at the transmission side. The same plate differences C40, C30, C25 are observed for changes until the state of S341 is adjusted.

S354, if the symmetry of C40 and C30 occurs, the symmetry of C25 is not generated. Because only the side part C25 does not meet the symmetrical condition, only the first oil cylinder is regulated in the regulation process, and the position fluctuation quantity of the oil cylinder meets L _W-1 ＝L _D-1 ≤3L _min 。

With the same driving side having a large plate difference, i.e. C _25-D ＞C _25-W An example is described. The specific adjusting method is that the first oil cylinder at the transmission side is pushed in, and the first oil cylinder at the operation side is pulled back. The same plate differences C40, C30, C25 are observed for changes until the state of S341 is adjusted.

S355, if it occursC40 and C25 are symmetrical, and C30 is asymmetrical. Because only the middle C30 does not meet the symmetry condition, if the first oil cylinder is regulated, the symmetrical C25 is greatly influenced; if the second oil cylinder is regulated, the balanced C40 is greatly influenced, so that all the oil cylinders need to be finely regulated in the regulating process, and the position fluctuation quantity of the oil cylinders meets L _W-1 ＝L _D-1 ＝L _min ，L _W-2 ＝L _D-2 ＝L _min . And observing the change of the values of C40, C30 and C25 at the moment, and if the condition of C in S343 is not satisfied, re-finding the same plate difference state corresponding to the current plate band, and adjusting.

With the same driving side having a large plate difference, i.e. C _30-D ＞C _30-W An example is described. The specific adjusting method is that the second oil cylinder at the transmission side is pushed in, and the second oil cylinder at the operation side is pulled back. The same plate differences C40, C30, C25 are observed for changes until the state of S341 is adjusted.

S356, if C25 symmetry occurs, C30 and C40 are asymmetric. When C40 and C30 do not accord with the symmetrical condition, the adjustment of the second oil cylinder has larger influence on the same plate difference of the two, so the second oil cylinder is taken as the main part in the adjustment process, and the position fluctuation of the oil cylinder meets L _W-1 ＝L _D-1 ＝3L _min The method comprises the steps of carrying out a first treatment on the surface of the The first oil cylinder is used as an auxiliary, the position fluctuation quantity of the oil cylinder is satisfied, L _W-2 ＝L _D-2 ≤2L _min 。

With the same driving side having a large plate difference, i.e. C _30-D ＞C _30-W ，C _40-D ＞C _40-W An example is described. The specific adjusting method is that the second oil cylinder at the transmission side is pushed in, and the second oil cylinder at the operation side is pulled back. And monitoring the numerical value changes of the C40 and the C30 in real time, stopping adjusting the second oil cylinder when the C40 meets or approaches to the balance condition, starting to pull back the first oil cylinder at the operation side, and pushing the first oil cylinder at the transmission side. The same plate differences C40, C30, C25 are observed for changes until the state of S341 is adjusted.

S357, if the symmetry of C30 and C25 occurs, the symmetry of C40 is not. Because only the side part C40 does not meet the symmetrical condition, only the second oil cylinder is regulated in the regulating process, and the position fluctuation of the oil cylinder meets L _W-1 ＝L _D-1 ≤3L _min 。

With the same driving side having a large plate difference, i.e. C _25-D ＞C _25-W An example is described. The specific adjusting method is that the second oil cylinder at the transmission side is pushed in, and the second oil cylinder at the operation side is pulled back. The same plate differences C40, C30, C25 are observed for changes until the state of S341 is adjusted.

S358, if C30 symmetry occurs, C40 and C25 are asymmetric. The rolling mill is supposed to be out of order, and the machine should be stopped for maintenance immediately after the rolling of the coiled steel is completed.

S36, checking and recording the horizontal displacement X of the operation side of the working roller again _W Horizontal displacement X of driving side of working roll _D Vertical displacement Y of operation side of working roll _w And the vertical displacement Y of the transmission side of the working roll _D The method comprises the steps of carrying out a first treatment on the surface of the Setting rightward offset and upward offset as positive direction; the stabilizing conditions are as follows:

|X _W |≤ΔX,|X _D |≤ΔX,|Y _W |＝|Y _D |≤ΔY

ensuring that the working roller meets stable conditions;

in particular, the method comprises the steps of,

a. if |X _W |≥ΔX,|X _D |≥ΔX,|Y _W |＝|Y _D The expression delta Y is smaller than or equal to delta Y, which means that the working roll is transversely offset again in the rolling process, and X is assumed _W ＞0,X _D When the working roll is smaller than 0, the operating side of the working roll is deviated to the right, the transmission side is deviated to the left, and the first oil cylinder on the upper right operating side needs to be slowly pushed, and the first oil cylinder 8 on the upper left operating side is slowly pulled back; slowly pushing the left upper driving side first oil cylinder 11, slowly pulling back the right upper driving side first oil cylinder. And continuously adjusting until the value of the displacement sensor meets the stable condition.

b. If |X _W |≥ΔX,|X _D |≥ΔX,|Y _W |＝|Y _D And the I is more than or equal to DeltaY, which indicates that the working roll is eccentrically displaced in the rolling process. According to the method, the eccentric angle alpha is calculated, if the working roll deviates to the right, the pressing angle of the right supporting roll is adjusted to be consistent with alpha, and the upper right operating side first oil cylinder and the transmission side first oil cylinder are slowly pushed forward. And continuously adjusting until the value of the displacement sensor meets the stable condition.

c. If |X _W |≤ΔX,|X _D |≤ΔX,|Y _W |＝|Y _D And the I is less than or equal to delta Y, and the stable condition is met, and the operation is continued.

S37, checking again and recording the reduction value C of the transmission side after rolling _d-o Reduction C of operation side after rolling _w-o ；

The operating side and drive side drop target values for each pass are expressed by the following formulas:

(C _w -C _w-i ) Nx, x-operating side

(C _d -C _d-i ) Nx, x-E (1, n) -transmission side

Wherein C is _w Representing the target edge drop value after the rolling of the operation side, C _w-i Representing the edge drop before rolling on the operating side, C _d Representing the target edge drop value after the rolling of the operation side, C _d-i Represents the edge drop value before rolling on the operation side, N _X Indicating the reduction in the x-th pass.

And circularly executing the steps, and when the detected edge drop value meets the following two formulas, calling the pass edge drop value to reach the standard:

C _w-o ≤(C _w -C _w-i )*Nx

C _d-o ≤(C _d -C _d-i )*Nx。

if the detected band edge drop value reaches the standard, the band edge drop value continues to be kept until the next time is started.

And if the detected plate belt edge drop value does not reach the standard, the regulation and control are circularly carried out until the condition of S36-C is met.

The related arrangement of the oil cylinder is as follows:

in practical design, the total length of the side support rollers is 1634mm.

The diameter of the first oil cylinder at the operation side is 200mm, the center line of the first oil cylinder is vertical to the center line of the side support roller, and the first oil cylinder is 232-235 mm away from the operation side edge part of the side support roller;

the diameter of the second oil cylinder at the operation side is 100mm, the center line of the second oil cylinder is vertical to the center line of the side support roller, and the second oil cylinder is 432-435 mm away from the operation side edge part of the side support roller;

the diameter of the first oil cylinder on the transmission side is 200mm, the center line of the first oil cylinder on the transmission side is vertical to the center line of the side supporting roller, and the first oil cylinder on the transmission side is 232-235 mm away from the transmission side edge part of the side supporting roller;

the diameter of the second oil cylinder at the transmission side is 100mm, the center line of the second oil cylinder is vertical to the center line of the side support roller, and the second oil cylinder is 432-435 mm away from the transmission side edge part of the side support roller.

As shown in fig. 3 and 4, in the present invention, each displacement sensor group adopts a configuration of a set of two detection elements, and the two detection elements are respectively located at an operation side end position and a transmission side end position; each detection element of the side support position consists of two displacement sensors, including a side support horizontal displacement sensor 4-2 and a side support vertical displacement sensor 4-1; the detection elements of the upper working roller and the lower working roller are composed of four displacement sensors, are respectively distributed in the roller radial horizontal direction and the roller radial vertical direction of the transmission side and the operation side of the working roller, and can acquire the spatial position of the working roller in real time according to the real-time data average value.

Each pressure sensor group adopts a configuration form of a group of two detection elements, and the two detection elements are respectively positioned at the lower sides of the side support hydraulic cylinders at the operation side and the transmission side; the detection element of each position consists of two pressure sensors, including a side support horizontal pressure sensor 4-4 and a side support plumb pressure sensor 4-3.

The following describes specific embodiments.

The specific implementation process comprises the following steps:

step 1: before rolling starts, performing pressing operation to a zero roll gap state aiming at a eighteen-roll mill, and performing zero clearing on each level of sensors;

step 2: performing rolling, and collecting horizontal displacement signals I of No. 1 and No. 2 sensors of the upper working roller transmission side _UDX-1 ＝8.137μm、I _UDX-2 The horizontal displacement signals I of the first 4-7 and second 4-8 upper work roll operation side horizontal displacement sensors are 8.265 μm _UWX-1 ＝-4.237μm、I _UWX-2 = -4.094 μm, vertical displacement signal I of upper working roll transmission side No. 1 and No. 2 sensor _UDY-1 ＝6.233μm、I _UDY-1 6.215 μm, the plumb displacement signals I of the first 4-5 and second 4-6 plumb displacement sensors _UWY-1 ＝6.232μm、I _UWY-2 = 6.216 μm; horizontal displacement signal I of No. 1 and No. 2 sensor on transmission side of lower working roll _DDX-1 ＝8.288μm、I _DDX-2 Sensor horizontal displacement signals I of lower working roll operating side 1, 2 = 8.314 μm _DWX-1 ＝-4.328μm、I _DWX-2 Sensor plumb displacement signal I of = -4.289 μm and No. 1 and No. 2 of lower working roller transmission side _DDY-1 ＝6.012μm、I _DDX-2 Sensor vertical displacement signal I of lower working roll operation side No. 1, no. 2 = 6.157 μm _DWY-1 ＝6.031μm、I _DWX-2 = 6.096 μm, and signal analysis was performed.

Step 2-1: and calculating the eccentricity of the transmission side and the operation side of the upper working roller and the lower working roller.

The above work rolls are exemplified:

2 sensors are arranged on each side, and the horizontal displacement and the vertical displacement of the working roller are represented by the average value of 2 signals:

the upper work roll drive side horizontal displacement is obtainable according to the above:

horizontal displacement of the upper working roll operation side:

vertical displacement of the transmission side of the upper working roll:

vertical displacement of the operation side of the upper working roll:

the method comprises the steps of taking a point A on the transmission side of a working roll, taking a point B on the operation side of the working roll, and taking a point C on the axis of the operation side of the working roll. The motion of the working roll is divided into 2 parts, wherein one part is horizontal rotation displacement of the working roll and the other part is eccentric displacement of the working roll. The displacement direction of the sensor is set to be the right direction.

When the work roll horizontally rotates and moves, the vertical displacement is 0, that is, y _A-A' ＝0,y _B-B' ＝0,x _A-A' ＝x ₁ ，x _B-B' ＝-x ₁ ，

When the working roller moves eccentrically, x _C-C' ＝x ₂ ，y _C-C' ＝I _UWY

So the sensor finally measures I _UWX ＝x ₂ -x ₁ ,I _UDX ＝x ₂ +x ₁ ,

The method can obtain:

the lower working roll is the same.

Step 3: according to the data measured in step 2:

I _UWX ＝-4.166μm、I _UDX ＝8.201μm、I _UWY ＝6.224μm、I _UDY ＝6.224μm

the whole working roll can be offset to the right and the upper part, and the working roll is called back.

The specific regulation is as follows: firstly, the angle of the upper right supporting roller is adjusted to 72 degrees, then the first oil cylinders on the upper right transmission side and the operation side are simultaneously pushed by 0.3mm, and the detection is carried out:

I _UWX ＝-1.633μm、I _UDX ＝1.286μm、I _UWY ＝1.241μm、I _UDY ＝1.242μm

and (3) fine-tuning the position of the working roller by utilizing the second oil cylinders on the upper right transmission side and the operation side, and pushing the second oil cylinders on the upper right transmission side and the operation side forward by 0.1mm, wherein the detection is that:

I _UWX ＝-0.023μm、I _UDX ＝0.202μm、I _UWY ＝0.023μm、I _UDY ＝0.023μm

the work roll offset is detected to satisfy the following condition:

|I _UWX |≤2μm,|I _UDX |≤2μm,|I _UWY |＝|I _UDY |≤2μm

work roll callback may be successful.

Further, edge drop adjustment is performed, and the specific steps are as follows:

step 1: before rolling, setting 6 times of rolling of the steel coil A, and reducing the transmission side edge value C after target rolling _o-d ＝C _o-w =20μm, the first pass reduction was n1=50% and each subsequent pass reduction was 10%. Starting rolling, monitoring the transmission side/operation side reduction value of the incoming material and the rolled plate and strip in real time, and recording the transmission side reduction value C of the incoming material _i-d =26 μm, incoming operation side drop value C _i-w Drive side reduction after rolling of 24 μm C _o-d =34 μm, post-rolling operation side drop value C _o-w ＝36μm；

Step 1-1: in the uncoiling and coiling stage, the eighteen-roller single-stand rolling mill is in an unstable rolling state, so that the values of all sides are collected and recorded without control;

step 1-2: the eighteen-roller single-stand rolling mill is in a variable speed control state and mainly performs thickness control, so that the edge drop value is acquired and recorded without control;

Step 2: pressure sensors are arranged on the back-up roll systems at two sides of the eighteen-roll single-stand reversible rolling mill, and the pressure sensors comprise horizontal pressure sensors and vertical pressure sensors. The horizontal pressure sensors are respectively arranged at the positions of the roller diameter bearings of the inlet side and outlet side supporting rollers which are one-layer rollers in the horizontal direction, and are used for collecting an inlet transmission side horizontal pressure value 30.124t, an inlet operation side horizontal pressure value 30.131t, an outlet transmission side horizontal pressure value 30.123t and an outlet operation side horizontal pressure value 30.126t; the vertical pressure sensors are disposed at positions in the vertical direction of the roller diameter bearings of the one-layer roller of the side backup rollers on the inlet side and the outlet side, and collect an inlet transmission side vertical pressure value 40.033t, an inlet operation side vertical pressure value 40.071t, an outlet transmission side vertical pressure value 40.029t, and an outlet operation side vertical pressure value 40.063t.

Step 3: measuring the same plate difference C of the transmission side _40-D ＝23μm、C _30-D ＝37μm、C _25-D Operation side common plate difference C=46 μm _40-W ＝25μm、C _30-W ＝33μm、C _25-W The same plate difference level of the hot rolled feed meets the following condition as being acceptable, with a plate thickness t=43 μm=0.8 mm, a plate width w=1500 mm:

|C _x-D -C _x-W |≤5

from the above data, it is possible to obtain:

|C _40-D -C _40-W |＝|23-25|＝2≤5

|C _30-D -C _30-W |＝|37-33|＝4≤5

|C _25-D -C _25-W |＝|43-46|＝3≤5

step 4: according to the calculation result, all C40, C30 and C25 meet the symmetry condition, and the operating side and the transmission side are symmetrical with the plate difference.

Step 5: and (3) aiming at the detection result in the step (4), regulating and controlling:

at present, the stress on the left side and the right side of the working roller is uniform, so that the operation side and the transmission side should be synchronously adjusted when the left side and the right side support oil cylinders are adjusted. The method is characterized in that the side part of the side supporting roller is stressed and deflected by pushing the second oil cylinder at the transmission side and the second oil cylinder at the operation side to move, thereby forming the effects of concave stress position and lifting side part, the edge of the working roll is directly reduced by pressure from the side support, the roll gap of the edge is improved, the corresponding reduction of rolling force of the edge of the strip steel during rolling can be judged, and the problem of edge drop of the strip steel is improved.

The displacement L of the second oil cylinder at each time ₂ ＝L _min Because the side support roller is located at the rolling position and the same plate difference performance of the plate and the strip is good in the current plate and strip rolling process, the extra force applied to the side support roller can destroy the current rolling balance, and therefore whether the edge drop value of the operation side and the transmission side of the rolled plate is improved or not is required to be monitored in real time after the oil cylinders are regulated each time. The reduction rate of the first pass is 50%, and the reduction value C of the transmission side after rolling is required after the first pass rolling is completed _o-d Side drop C of operation after rolling is less than or equal to 28 mu m _o-w Less than or equal to 28 mu m; according to the feedback of the field data, the displacement L of the second oil cylinder ₂ When the rolling speed is=0.2 mm, the reduction value C of the transmission side after rolling _o-d =32 μm, 2 μm drop; reduction C of the operating side after rolling _o-w =35 μm, 1 μm drop. Continuously pushing the second oil cylinder forwards when L ₂ When the rolling speed is=0.6 mm, the reduction value C of the transmission side after rolling _o-d =27 μm, 8 μm drop; reduction C of the operating side after rolling _o-w =28 μm, 8 μm drop. And (3) reaching the target edge drop value of the first pass, stopping regulation and control, and continuously detecting and counting various index values.

Step 6: the horizontal displacement signal I of the sensor number 1 and 2 on the upper working roller transmission side is checked and recorded again _UDX-1 ＝0.203μm、I _UDX-2 Sensor horizontal displacement signals I of No. 1 and No. 2 of upper working roller operation side of 0.184 mu m _UWX-1 ＝-0.465μm、I _UWX-2 Sensor plumb displacement signal I of 1 and 2 number sensor of upper working roller driving side with the size of minus 0.494 mu m _UDY-1 ＝0.383μm、I _UDY-1 Vertical displacement signals I of sensors 1 and 2 on the operating side of the upper working roll with the diameter of 0.379 mu m _UWY-1 ＝0.381μm、I _UWY-2 =0.382 μm; horizontal displacement signal I of No. 1 and No. 2 sensor on transmission side of lower working roll _DDX-1 ＝0.162μm、I _DDX-2 Sensor horizontal displacement signals I of lower working roller operation side 1, 2 =0.193 μm _DWX-1 ＝0.172μm、I _DWX-2 =0.182 μm, lower working roll driving side 1,Vertical displacement signal I of No. 2 sensor _DDY-1 ＝0.032μm、I _DDY-2 Sensor vertical displacement signal I of lower working roll operation side 1, 2 =0.036μm _DWY-1 ＝0.031μm、I _DWX-2 =0.034 μm, and signal analysis was performed.

The working roll stabilizing conditions are as follows:

|X _W |≤2μm,|X _D |≤2μm,|Y _W |＝|Y _D |≤2μm

judging whether the working roller is in a stable state according to the measured data:

the above work rolls are exemplified:

calculating to obtain the horizontal displacement data of the transmission side of the upper working roll:

calculating to obtain upper working roll operation side horizontal displacement data:

calculating to obtain the plumb displacement data of the transmission side of the upper working roll:

calculating to obtain plumb displacement data of the operation side of the upper working roll:

the working roller is stable and does not need to be regulated and controlled again.

Step 7: rechecking and recording the reduction C of the operation side after rolling _w-o After rolling the transmission side drop value c=28 μm _d-o =27 μm. The operating side and drive side drop target values for each pass are expressed by the following formulas:

the first pass operation side drop target value:

C _1-w ＝C _w -(C _w -C _w-i )*Nx＝34-(34-20)*50％＝28μm

first pass transmission side drop target value:

C _1-d ＝C _d -(C _d -C _d-i )*Nx＝36-(36-20)*50％＝28μm

because of the side drop value C of the current post-rolling operation _w-o ＝28μm≤C _1-w After rolling the transmission side drop value c=28 μm _d-o ＝27μm≤C _1-d =28 μm, all fit the first pass target edge drop value. And continuing to maintain the regulation state until the next pass.

Step 8: the above steps are cyclically carried out until the rolling of the coil steel is finished.

While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.

Claims

1. The eighteen-rolling-mill side supporting force control method based on the edge drop control is characterized by comprising the following steps:

the platform comprises a rolling mill main body device and a detection device;

setting working roll stabilizing conditions:

|X _W |≤ΔX,|X _D |≤ΔX,|Y _W |＝|Y _D |≤ΔY

and the rolling reduction is satisfied

S33, setting the same plate difference C on the transmission side _40-D 、C _30-D 、C _25-D Difference of same plate C on operation side _40-W 、C _30-W 、C _25-W The level of the same plate difference of the hot rolled feed meets the following conditions:

|C _x-D -C _x-W |≤C ₁

wherein x is 40, 30, 25 respectively;

C ₁ taking 5 mu m as a calibration value;

s35, regulating and controlling the detection result of the S34;

S36, checking and recording the horizontal displacement X of the operation side of the working roller again _W Driving of working rollsLateral horizontal displacement X _D Vertical displacement Y of operation side of working roll _w And the vertical displacement Y of the transmission side of the working roll _D The method comprises the steps of carrying out a first treatment on the surface of the Setting rightward offset and upward offset as positive direction; the stabilizing conditions are as follows:

|X _W |≤ΔX,|X _D |≤ΔX,|Y _W |＝|Y _D |≤ΔY

ensuring that the working roller meets stable conditions;

C _w-o ≤(C _w -C _w-i )*Nx

C _d-o ≤(C _d -C _d-i )*Nx

where Nx is the X-th pass reduction rate.

2. The eighteen-rolling-mill-side supporting-force control method based on the side drop control according to claim 1, wherein each displacement sensor group in S1 adopts a configuration form of a group of two detection elements, and the two detection elements are respectively located at an operation-side end position and a transmission-side end position; each detection element of the side support position consists of two displacement sensors, including a side support horizontal displacement sensor and a side support vertical displacement sensor; the detection elements of the upper working roller and the lower working roller are composed of four displacement sensors which are respectively arranged in the roller radial horizontal direction and the roller radial vertical direction of the transmission side and the operation side of the working roller.

3. The eighteen-rolling-mill side supporting force control method based on the side drop control according to claim 1, wherein each pressure sensor group in S1 adopts a configuration form of a group of two detection elements, and the two detection elements are respectively positioned at the lower sides of the side supporting hydraulic cylinders of the operation side and the transmission side; the detection element of each position consists of two pressure sensors, including a side support horizontal pressure sensor and a side support plumb pressure sensor.

4. The eighteen-rolling-mill-side support force control method based on the edge drop control according to claim 1, wherein the signal analysis in S22 is specifically:

Vertical displacement->

Expressed as the average of two sensor signals:

s222, calculating an eccentric angle alpha:

5. The eighteen-roller machine side supporting force control method based on edge drop control according to claim 1, wherein in S31, the uncoiling and coiling phases and the head and tail rolling phases, each edge drop value is collected and recorded without control.

6. The eighteen-rolling-mill-side supporting-force control method based on the edge drop control according to claim 1, wherein the pre-judging process in S34 is specifically as follows:

s341, if all the C40, C30 and C25 are symmetrical with the plate difference, the plates at the two sides of the operation side and the transmission side are uniformly stressed in the rolling process, the symmetry of the transverse thickness of the plates is well controlled, and the thickness of the plate strip at the operation side and the transmission side is changed uniformly after rolling;

s343, if at least one identical plate difference symmetry exists among C40, C30 and C25 and at least one identical plate difference asymmetry exists, continuing to acquire data, if the subsequent identical plate difference asymmetry disappears, performing according to the step S341, and if the subsequent identical plate difference symmetry disappears, performing according to the step S342; if there is still at least one with plate difference symmetry and at least one with plate difference asymmetry, then:

7. The eighteen-rolling-mill-side support force control method based on the edge drop control according to claim 1, wherein in S36, specifically:

s363, if |X _W |≤ΔX,|X _D |≤ΔX,|Y _W |＝|Y _D And if the I is less than or equal to delta Y and the stable condition is metAnd continuing to hold.