CN113600614B - Method, device, medium and equipment for adjusting precision of rocker arm of pinch roll - Google Patents
Method, device, medium and equipment for adjusting precision of rocker arm of pinch roll Download PDFInfo
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- CN113600614B CN113600614B CN202110714747.3A CN202110714747A CN113600614B CN 113600614 B CN113600614 B CN 113600614B CN 202110714747 A CN202110714747 A CN 202110714747A CN 113600614 B CN113600614 B CN 113600614B
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- weight compensation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
- B21B1/26—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by hot-rolling, e.g. Steckel hot mill
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
- B21C47/34—Feeding or guiding devices not specially adapted to a particular type of apparatus
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B2015/0057—Coiling the rolled product
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Abstract
The invention provides a method, a device, a medium and equipment for adjusting precision of a pinch roll rocker arm, wherein the method comprises the following steps: determining standard dead weight compensation values corresponding to the positions of the pinch roll operation side and the transmission side at each target oil cylinder, and fitting a first curve; determining a pinch roll operation side reference standard dead weight compensation value and a transmission side reference standard dead weight compensation value corresponding to the position of the reference oil cylinder; determining additional dead weight compensation values on two sides of the pinch roll based on the reference standard dead weight compensation values on two sides; adjusting the precision of a rocker arm of the pinch roll based on a curve slope value between the pressure difference at two sides of the pinch roll and the roll gap difference variable quantity and the additional dead weight compensation value at two sides; so, can confirm the height that the pinch roll rocking arm needs the adjustment according to the curve slope value between pressure differential and the poor variation of roll gap and the additional dead weight compensation difference in pinch roll hydro-cylinder both sides, adjust the rocking arm distortion degree indirectly through the height to pinch roll rocking arm both sides, and then adjust the rocking arm precision, ensure coil of strip shape quality.
Description
Technical Field
The invention belongs to the technical field of hot continuous rolling, and particularly relates to a method, a device, a medium and equipment for adjusting the precision of a rocker arm of a pinch roll.
Background
At present, the hot continuous rolling coiling pinch roll at home and abroad generally adopts an upper pinch roll rocker arm structure, and the upper pinch roll rocker arm structure is shown in figure 1 in detail.
The main disadvantage of the rocker arm structure is insufficient precision, as shown in fig. 2, the rocker arm deforms and precision is reduced due to long-term use, and the stress difference between the two sides (the operation side and the transmission side) is large. When thin specifications are produced, the stress state of the ring at the position of the pinch roll is different from that of the pressure ring, so that the pressure deviation of two sides (an operation side and a transmission side) of the pinch roll, which acts on strip steel, is large. In addition, actual pressure deviation fluctuation is large in different stages, different steel types and different strip steel specifications, an operator has no means to adjust in advance, after finish rolling and steel throwing, a pinch roll extrudes strip steel to be askew, so that the strip steel deviates one side or two sides alternately, the tail part of the strip steel has defects of tail tower shape, misalignment, overflow edge and the like, a large number of steel coils are repaired, and rolling lines even stop production due to quality problems in serious cases.
Because the space size of the rocker arm is large, the precision measurement difficulty is large, the problem is difficult to quickly identify in the prior art, and the problem is difficult to process when the problem occurs, so that a large amount of abnormal coil-shaped steel coils are generated, and the coil-shaped quality of the steel coils is seriously influenced.
Disclosure of Invention
Aiming at the problems in the prior art, the embodiment of the invention provides a method, a device, a medium and equipment for adjusting the precision of a rocker arm of a pinch roller, which are used for solving the technical problems that in the prior art, the precision of the rocker arm is difficult to detect and adjust quickly, a large number of abnormal steel coils are generated, and the coil shape quality of the steel coils is seriously influenced.
The invention provides a method for adjusting the precision of a rocker arm of a pinch roll, which comprises the following steps:
determining standard dead weight compensation values corresponding to the positions of target oil cylinders on the operation side and the transmission side of the pinch roll in a working state;
fitting a first curve based on the positions of the target oil cylinders and the corresponding standard dead weight compensation values, wherein the first curve is used for representing the corresponding relation between the positions of the oil cylinders and the standard dead weight compensation values;
controlling the pressure of the pinch roll to zero, and determining the position of a corresponding reference oil cylinder when the pressure of the pinch roll is zero;
determining a reference standard dead weight compensation value of a pinch roll operation side and a reference standard dead weight compensation value of a pinch roll transmission side corresponding to the reference oil cylinder position based on the first curve and the reference oil cylinder position;
determining a first additional dead weight compensation value of the pinch roll operation side based on the reference standard dead weight compensation value of the pinch roll operation side and a first oil cylinder pressure corresponding to the position of the reference oil cylinder of the pinch roll operation side;
determining a second additional dead weight compensation value of the pinch roll transmission side based on the reference standard dead weight compensation value of the pinch roll transmission side and a second oil cylinder pressure corresponding to the position of the reference oil cylinder of the pinch roll transmission side;
acquiring a curve slope value between the pressure difference between the operation side and the transmission side of the pinch roll and the roll gap difference variation;
and adjusting the rocker arm precision of the pinch roll based on the curve slope value, the first additional dead weight compensation value and the second additional dead weight compensation value.
Optionally, the determining a standard dead weight compensation value corresponding to the position of each target cylinder at the operation side and the transmission side of the pinch roll in the working state includes:
when the transmission shaft of the pinch roll is in a disengagement state, determining a first self-weight compensation value of the pinch roll corresponding to the position of each target oil cylinder;
when the transmission shaft of the pinch roll is in a connection state, determining a second self-weight compensation value of the pinch roll corresponding to the position of each target oil cylinder;
according to the formula
Determining standard dead weight compensation value G corresponding to the position of each target oil cylinder on the pinch roll operation side in a working state os1 ；
According to
Determining a standard dead weight compensation value G corresponding to the position of each target oil cylinder on the transmission side of the pinch roll in a working state ds1 (ii) a Wherein, G is 1 For said second pinch roll dead weight compensation value, said G 2 The self weight compensation value of the first pinch roll is obtained.
Optionally, the controlling the pressure of the pinch roll to zero includes:
controlling the pinch roll to be closed from a fully open position, and resetting the pressure of the pinch roll when the pinch roll is closed to a first preset roll gap;
and controlling the pinch roll to be continuously closed from the first preset roll gap, and when the pressure of the pinch roll reaches a preset target value and the pressure fluctuation of the pinch roll is within a preset range, carrying out zero clearing on the roll gap of the pinch roll.
Optionally, the determining, based on the first curve and the reference cylinder position, a reference standard dead weight compensation value of an operation side of the pinch roll and a reference standard dead weight compensation value of a transmission side of the pinch roll corresponding to the reference cylinder position includes:
substituting the reference oil cylinder position into the first curve to obtain a reference standard dead weight compensation value G of the pinch roll at the pinch roll operation side corresponding to the reference oil cylinder position os And the reference standard dead weight compensation value G of the transmission side of the pinch roll ds 。
Optionally, the determining a first additional self-weight compensation value of the pinch roll operation side based on the reference standard self-weight compensation value of the pinch roll operation side and the first cylinder pressure of the pinch roll operation side corresponding to the reference cylinder position includes:
according to formula G os2 ＝F co ×k-G os Determining a first additional dead weight compensation value G of the operating side of the pinch roll os2 (ii) a Wherein, F is co The pressure of a first oil cylinder corresponding to the position of the reference oil cylinder on the operation side of the pinch roll, k is the pressure geometric coefficient of the pinch roll, and G is os And the self-weight compensation value is a reference standard self-weight compensation value of the pinch roll operation side corresponding to the position of the reference oil cylinder.
Optionally, the determining a second additional dead-weight compensation value of the driving side of the pinch roll based on the reference standard dead-weight compensation value of the driving side of the pinch roll and a second cylinder pressure corresponding to the position of the reference cylinder of the driving side of the pinch roll includes:
according to formula G ds2 ＝F cd ×k-G ds Determining a second additional weight compensation value G of the drive side of the pinch roll ds2 (ii) a Wherein, F is cd The pressure of a second oil cylinder corresponding to the position of the reference oil cylinder at the transmission side of the pinch roll, k is a geometric coefficient of the pressure of the pinch roll, G ds The self-weight compensation value is a reference standard self-weight compensation value of the pinch roll transmission side corresponding to the position of the reference oil cylinder.
Optionally, the adjusting the precision of the rocker arm of the pinch roll based on the curve slope value, the first additional self-weight compensation value, and the second additional self-weight compensation value includes:
based on the formula
Determining the height difference m between the transmission side and the operation side of the pinch roll;
adjusting the height of a rocker arm at the transmission side of the pinch roll or the operation side of the pinch roll according to the height difference; wherein, the first and the second end of the pipe are connected with each other,
the G is ds2 For a second additional dead-weight compensation value of the drive side of the pinch roll, G os2 And n is the curve slope value, and is a first additional dead weight compensation value of the operation side of the pinch roll.
The invention also provides a device for adjusting the precision of the rocker arm of the pinch roll, which comprises:
the first determining unit is used for determining standard dead weight compensation values corresponding to the positions of target oil cylinders on the operation side and the transmission side of the pinch roll in a working state;
the fitting unit is used for fitting a first curve based on the positions of the target oil cylinders and the corresponding standard dead weight compensation values, and the first curve is used for representing the corresponding relation between the positions of the oil cylinders and the standard dead weight compensation values;
the control unit controls the pressure of the pinch roll to be zero, and determines the position of a corresponding reference oil cylinder when the pressure of the pinch roll is zero;
the second determining unit is used for determining a reference standard dead weight compensation value of the pinch roll operation side and a reference standard dead weight compensation value of the pinch roll transmission side corresponding to the reference oil cylinder position based on the first curve and the reference oil cylinder position; determining a first additional dead weight compensation value of the pinch roll operation side based on the reference standard dead weight compensation value of the pinch roll operation side and a first oil cylinder pressure corresponding to the position of the reference oil cylinder of the pinch roll operation side; determining a second additional dead weight compensation value of the pinch roll transmission side based on the reference standard dead weight compensation value of the pinch roll transmission side and a second oil cylinder pressure corresponding to the position of the reference oil cylinder of the pinch roll transmission side;
the acquisition unit is used for acquiring a curve slope value between the pressure difference between the operation side and the transmission side of the pinch roll and the roll gap difference variation;
and the adjusting unit is used for adjusting the precision of the rocker arm of the pinch roll based on the curve slope value, the first additional self-weight compensation value and the second additional self-weight compensation value.
The invention also provides a storage medium having stored thereon a computer program which, when executed by a processor, implements the method of any one of the above.
The invention also provides a computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the method of any one of the above when executing the program.
The invention provides a method, a device, a medium and equipment for adjusting precision of a pinch roll rocker arm, wherein the method comprises the following steps: determining standard dead weight compensation values corresponding to the positions of target oil cylinders on the operation side and the transmission side of the pinch roll in a working state; fitting a first curve based on the positions of the target oil cylinders and the corresponding standard dead weight compensation values, wherein the first curve is used for representing the corresponding relation between the positions of the oil cylinders and the standard dead weight compensation values; controlling the pressure of the pinch roll to zero, and determining the position of a corresponding reference oil cylinder when the pressure of the pinch roll is zero; determining a pinch roll operation side reference standard dead weight compensation value and a pinch roll transmission side reference standard dead weight compensation value corresponding to the reference oil cylinder position based on the first curve and the reference oil cylinder position; determining a first additional dead weight compensation value of the pinch roll operation side based on the reference standard dead weight compensation value of the pinch roll operation side and a first oil cylinder pressure corresponding to the position of the reference oil cylinder of the pinch roll operation side; determining a second additional dead weight compensation value of the pinch roll transmission side based on the reference standard dead weight compensation value of the pinch roll transmission side and a second oil cylinder pressure corresponding to the position of the reference oil cylinder of the pinch roll transmission side; acquiring a curve slope value between the pressure difference between the operation side and the transmission side of the pinch roll and the roll gap difference variation; adjusting the rocker arm precision of the pinch roll based on the curve slope value, the first additional dead weight compensation value and the second additional dead weight compensation value; therefore, when the precision of the rocker arm of the pinch roll is reduced to cause the roll shape at the tail of the strip steel to be uncontrolled, the twisting direction of the rocker arm of the pinch roll can be judged through the standard dead weight compensation difference value and the additional dead weight compensation value of the pinch roll, the specific height of the rocker arm of the pinch roll to be adjusted is obtained through calculation according to the curve slope value between the pressure difference and the roll gap and the additional dead weight compensation difference values at the two sides of the oil cylinder of the pinch roll, the twisting degree of the rocker arm of the pinch roll is indirectly adjusted through adjusting the height of the rocker arm of the pinch roll, the precision of the rocker arm is further adjusted, the twisting degree of the rocker arm of the pinch roll is finally guaranteed to be within an acceptable range, and the roll shape quality of the strip steel is guaranteed.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a schematic diagram of a pinch roll rocker arm configuration provided in the prior art;
FIG. 2 is a schematic diagram of the pinch roll rocker arm provided by the prior art after being twisted;
FIG. 3 is a schematic flow chart of a method for adjusting the precision of a pinch roll rocker arm according to an embodiment of the invention;
FIG. 4 is a diagram illustrating a second curve according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a device for adjusting the precision of a pinch roll rocker arm provided by an embodiment of the invention;
FIG. 6 is a schematic structural diagram of a computer device for adjusting the precision of a pinch roll rocker arm provided by an embodiment of the invention;
FIG. 7 is a schematic structural diagram of a computer storage medium for adjusting the precision of a pinch roll rocker arm according to an embodiment of the present invention.
Detailed Description
The invention provides a method, a device, a medium and equipment for adjusting the precision of a rocker arm of a pinch roller, and aims to solve the technical problems that in the prior art, the precision of the rocker arm is difficult to detect and adjust, a large number of abnormal steel coils are generated, and the shape and the quality of the steel coil are seriously influenced.
In order to better understand the technical solutions, the technical solutions of the embodiments of the present specification are described in detail below with reference to the drawings and specific embodiments, and it should be understood that the specific features of the embodiments and embodiments of the present specification are detailed descriptions of the technical solutions of the embodiments of the present specification, and are not limitations of the technical solutions of the present specification, and the technical features of the embodiments and embodiments of the present specification may be combined with each other without conflict.
The embodiment provides a method for adjusting the precision of a pinch roll rocker arm, which comprises the following steps of:
s310, determining standard dead weight compensation values corresponding to the positions of target oil cylinders on the operation side and the transmission side of the pinch roll in a working state;
determining standard dead weight compensation values corresponding to the positions of target oil cylinders on the operation side and the transmission side of the pinch roll in a working state. The target cylinder position is an oil cylinder magnetic scale position and can include multiple positions, for example, the target cylinder position in this embodiment includes 5, and the oil cylinder magnetic scale positions are 36mm,175mm,350mm,525mm and 700mm, respectively. The target cylinder position may be selected based on actual conditions, and is not limited herein.
In this embodiment, determining the standard dead weight compensation values corresponding to the positions of the target cylinders on the operation side and the transmission side of the pinch roll in the connection state of the transmission shaft of the pinch roll includes:
when the transmission shaft of the pinch roll is in a disengagement state, determining a first self-weight compensation value of the pinch roll corresponding to the position of each target oil cylinder;
when the transmission shaft of the pinch roll is in a connection state, determining a second self-weight compensation value of the pinch roll corresponding to the position of each target oil cylinder;
according to the formula
Determining standard dead weight compensation value G corresponding to the position of each target oil cylinder on the pinch roll operation side in a working state os1 ；
According to
Determining standard dead weight compensation value G corresponding to the position of each target oil cylinder on the transmission side of the pinch roll in the working state ds1 (ii) a Wherein G is 1 For a self-weight compensation value of the second pinch roll, G 2 Is the self-weight compensation value of the first pinch roll.
Wherein, the standard dead weight compensation value G corresponding to the position of each target oil cylinder on the operation side of each pinch roll os1 And determining a standard dead weight compensation value G corresponding to the position of each target oil cylinder on the transmission side of the pinch roll ds1 As shown in table 1.
TABLE 1
Specifically, a transmission shaft of the upper pinch roll is disconnected, the transmission shaft of the pinch roll is in a disconnected state, and when the pinch roll is controlled to be opened from a roll gap of 0 to the maximum position of the roll gap at a preset speed (such as 1 mm/s), the self-weight compensation value of the third pinch roll corresponding to the position of each target oil cylinder is obtained; and then controlling the pinch rolls to descend to 0 roll gap from the maximum roll gap position at a preset speed (such as 1 mm/s), and acquiring the self-weight compensation values of the fourth pinch rolls corresponding to the positions of the target oil cylinders.
And determining the average value of the self-weight compensation values of the third pinch roll and the fourth pinch roll according to the positions of the target oil cylinders, wherein the average value is the self-weight compensation value of the first pinch roll.
Similarly, connecting the transmission shafts of the upper pinch roll, controlling the pinch roll to be in a connection state, and obtaining the self-weight compensation value of the fifth pinch roll corresponding to the position of each target oil cylinder when the pinch roll is opened from a roll gap of 0 to the maximum position of the roll gap at a preset speed (such as 1 mm/s); and then, when the pinch roll is controlled to be lowered to 0 roll gap from the maximum roll gap position at a preset speed (such as 1 mm/s), acquiring the self-weight compensation value of the sixth pinch roll corresponding to the position of each target oil cylinder.
And determining the average value of the dead weight compensation value of the fifth pinch roll and the dead weight compensation value of the sixth pinch roll aiming at the positions of the target oil cylinders, wherein the average value is the dead weight compensation value of the second pinch roll.
Wherein, the determination modes of the third pinch roll dead weight compensation value, the fourth pinch roll dead weight compensation value, the fifth pinch roll dead weight compensation value and the sixth pinch roll dead weight compensation value are the same and are all according to the formula (F) co1 +F cd1 ) X k is determined; the only difference is that when the dead weight compensation value of the third pinch roll, the dead weight compensation value of the fourth pinch roll, the dead weight compensation value of the fifth pinch roll and the dead weight compensation value of the sixth pinch roll are calculated, the actual F is used co1 Different values, using actual F cd1 The values are also different.
K is a pinch roll pressure geometric coefficient, and the value of k can be set according to the actual conditions of each device, such as 1.4-1.5; f co1 The pressure F of the oil cylinder at the operation side of the pinch roll is actually measured during the opening and closing processes of the roll gap of the pinch roll cd1 The pressure of the oil cylinder at the transmission side of the pinch roll is actually measured in the opening and closing processes of the pinch roll gap.
S311, fitting a first curve based on the positions of the target oil cylinders and the corresponding standard dead weight compensation values, wherein the first curve is used for representing the corresponding relation between the positions of the oil cylinders and the standard dead weight compensation values;
after the target cylinder positions and the corresponding standard dead weight compensation values are obtained, the target cylinder positions (cylinder magnetic scale positions) and the corresponding standard dead weight compensation values need to be fitted respectively to form a first curve. It should be noted that the fitting needs to be performed on the positions of the target cylinders on the transmission side of the pinch roll and the corresponding standard dead weight compensation values, and the fitting needs to be performed on the positions of the target cylinders on the operation side of the pinch roll and the corresponding standard dead weight compensation values. The first curve thus comprises two, respectively a first curve corresponding to the drive side of the pinch roll and a first curve corresponding to the operating side of the pinch roll, the two curves being different.
The first curve is used for representing the corresponding relation between the oil cylinder positions of the operation side and the transmission side and the standard dead weight compensation value. In the first curve, the abscissa is the target cylinder position and the ordinate is the standard dead weight compensation value.
After the first curve is determined, the standard dead weight compensation value corresponding to the oil cylinder positions on two sides (a transmission side and an operation side) of any pinch roll can be calculated by using the first curve.
S312, controlling the pressure of the pinch roll to be zero, and determining the position of a corresponding reference oil cylinder when the pressure of the pinch roll is zero;
this step requires zeroing the pinch rolls. Specifically, the pressure of the pinch roll is controlled to be zero, and the position of a corresponding reference oil cylinder is determined when the pressure of the pinch roll is zero.
In this embodiment, the controlling the pressure zero setting of the pinch roll includes:
controlling the pinch roll to be closed from a completely opened position, and resetting the pressure of the pinch roll when the pinch roll is closed to a first preset roll gap;
and controlling the pinch roll to be continuously closed from a first preset roll gap, and resetting the roll gap of the pinch roll when the pressure of the pinch roll is determined to reach a preset target value and the pressure fluctuation of the pinch roll is in a preset range.
The first preset roll gap is 20mm, and the first preset roll gap is close to the roll gap of the pinch roll during working.
In this embodiment, determining the position of the reference cylinder corresponding to the pinch roll when the pressure is zero includes:
acquiring a corresponding roll gap distance s when the pressure of a pinch roll is zero;
determining a reference oil cylinder position h based on a formula h = k × s + a; and k is a pressure geometric coefficient of the pinch roll, and a is a calibration offset of the oil cylinder position.
It is noted that the nip distance s corresponds to 20mm when the pinch roll pressure is zero.
Thus, the reference cylinder position is determined.
S313, determining a pinch roll operation side reference standard dead weight compensation value and a pinch roll transmission side reference standard dead weight compensation value corresponding to the reference oil cylinder position based on the first curve and the reference oil cylinder position;
after the first curve is determined, the pinch roll operation side reference standard dead weight compensation value and the pinch roll transmission side reference standard dead weight compensation value corresponding to the reference oil cylinder position can be determined based on the first curve and the reference oil cylinder position, and the method specifically comprises the following steps:
respectively substituting the reference oil cylinder positions at the two sides of the pinch roll into the corresponding first curves to obtain the reference standard dead weight compensation value G of the pinch roll at the operation side of the pinch roll corresponding to the reference oil cylinder positions os And the driving side reference standard dead weight compensation value G of the pinch roll ds 。
S314, determining a first additional dead weight compensation value of the pinch roll operation side based on the reference standard dead weight compensation value of the pinch roll operation side and the first cylinder pressure corresponding to the position of the reference cylinder of the pinch roll operation side;
then based on the reference standard deadweight compensation value G of the pinch roll operation side os And determining a first additional dead weight compensation value of the pinch roll operation side according to the pressure of a first oil cylinder corresponding to the position of the reference oil cylinder on the pinch roll operation side.
In particular, according to formula G os2 ＝F co ×k-G os Determining a first additional dead-weight compensation value G for the operating side of a pinch roll os2 (ii) a Wherein, F co The first cylinder pressure corresponding to the position of the reference cylinder at the operation side of the pinch roll, k is the pressure geometric coefficient of the pinch roll, G os And the self-weight compensation value is referred to the operation side of the pinch roll corresponding to the position of the reference oil cylinder.
S315, determining a second additional dead weight compensation value of the pinch roll transmission side based on the reference standard dead weight compensation value of the pinch roll transmission side and a second oil cylinder pressure corresponding to the position of the pinch roll transmission side in the reference oil cylinder;
similarly, based on the reference standard dead weight compensation value G of the pinch roll transmission side ds Determining a second additional dead weight compensation value of the pinch roll transmission side according to the pressure of a second oil cylinder at the pinch roll transmission side corresponding to the position of the reference oil cylinder;
in particular, according to formula G ds2 ＝F cd ×k-G ds Determining the drive side of a pinch rollSecond additional dead-weight compensation value G of ds2 (ii) a Wherein, F cd The pressure of a second oil cylinder corresponding to the position of the reference oil cylinder at the transmission side of the pinch roll, k is the pressure geometric coefficient of the pinch roll, G ds The self-weight compensation value is a reference standard self-weight compensation value of the pinch roll transmission side corresponding to the position of the reference oil cylinder.
It should be noted that the execution sequence of step S314 and step S315 is not limited strictly, and step S314 may be executed first, or step S315 may be executed first, which is not limited in this embodiment.
S316, acquiring a curve slope value between the pressure difference between the operation side and the transmission side of the pinch roll and the roll gap difference variation;
when the pinch roll gap difference changes, the pressure difference between the operation side and the transmission side of the pinch roll also changes, the pressure difference can reflect the precision of the rocker arm, and if the heights of the two sides (the operation side and the transmission side) of the pinch roll are inconsistent, the pressure difference is inevitably large.
Therefore, in this step, it is necessary to fit a second curve between the pressure difference between the feed roller operation side and the drive side and the roll gap and obtain a slope value of the second curve.
Specifically, the pinch roll is controlled to be in an idle position loop, the roll gap difference of the pinch roll is adjusted to be generally adjusted from 0 to 2mm or-2 mm, the change of the pressure difference between two sides of the pinch roll is determined through a pda curve, and then a second curve between the pressure difference between two sides of the pinch roll and the roll gap difference change amount is fitted, as shown in fig. 4, the second curve is close to linearity, the second curve is used as a linear curve in the embodiment, and the second curve is Y =8.66x-1.58; then the second curve has a curve slope value of 8.66.
And S317, adjusting the rocker arm precision of the pinch roll based on the curve slope value, the first additional self-weight compensation value and the second additional self-weight compensation value.
In the step, the accuracy of the rocker arm of the pinch roll can be adjusted based on the curve slope value, the first additional dead weight compensation value and the second additional dead weight compensation value.
In particular, based on a formula
Determining the height difference m between the transmission side and the operation side of the pinch roll;
adjusting the height of a rocker arm at the transmission side of the pinch roll or the operation side of the pinch roll according to the height difference; wherein the content of the first and second substances,
G ds2 for a second additional dead-weight compensation value, G, of the drive side of the pinch roll os2 And n is a curve slope value, and is a first additional dead weight compensation value of the operation side of the pinch roll.
When the height of the rocker arm on the transmission side of the pinch roll or the operation side of the pinch roll is adjusted according to the height difference, a shim with the height of m is padded on the side corresponding to the negative value of the additional dead weight compensation value, and specifically, the shim is installed between a bearing seat of the pinch roll and the rocker arm on the side.
For example, such as G os2 is-18KN, G ds2 At 18KN, then m =36/8.6623=4.17mm a shim point of corresponding thickness can now be placed on the operating side between the pinch roll chock and the rocker arm to compensate for the pinch roll rocker arm accuracy.
It is worth noting that the degree of distortion of the rocker arm between the operation side and the transmission side of the pinch roll is reflected on the height difference m of the rocker arm on two sides of the pinch roll, so that the degree of distortion of the rocker arm can be indirectly adjusted by adjusting the height difference of the rocker arm on two sides, the degree of distortion of the rocker arm of the pinch roll is finally ensured to be within an acceptable range, the pressure difference on two sides of the pinch roll is reduced, and the shape quality of a steel coil is ensured.
In the embodiment, when the precision of the pinch roll rocker arm is reduced to cause the shape of the tail part of the strip steel to be uncontrollable, the twisting direction of the pinch roll rocker arm can be judged through the standard dead weight compensation difference value and the additional dead weight compensation value of the pinch roll, the specific height of the pinch roll rocker arm to be adjusted is obtained through calculation according to the curve slope value between the pressure difference and the roll gap and the additional dead weight compensation difference values on the two sides of the pinch roll oil cylinder, the heights of the two sides of the pinch roll rocker arm are adjusted, the precision of the rocker arm is further adjusted, the fact that the pinch roll rocker arm is twisted within an acceptable range is finally guaranteed, and the shape quality of the steel coil is guaranteed.
Based on the same inventive concept as the previous embodiment, the invention also provides a device for adjusting the precision of the rocker arm of the pinch roll, as shown in fig. 5, the device comprises:
the first determining unit 51 is used for determining standard dead weight compensation values corresponding to the positions of target oil cylinders on the operation side and the transmission side of the pinch roll in a working state;
the fitting unit 52 is configured to fit a first curve based on each target cylinder position and the corresponding standard dead weight compensation value, where the first curve is used to represent a corresponding relationship between the cylinder position and the standard dead weight compensation value;
the control unit 53 controls the pressure of the pinch roll to be zero, and determines the position of the corresponding reference oil cylinder when the pressure of the pinch roll is zero;
a second determining unit 54, configured to determine, based on the first curve and the reference cylinder position, a reference standard deadweight compensation value of a pinch roller operating side and a reference standard deadweight compensation value of a pinch roller transmission side corresponding to the reference cylinder position; determining a first additional dead weight compensation value of the pinch roll operation side based on the reference standard dead weight compensation value of the pinch roll operation side and a first oil cylinder pressure corresponding to the position of the reference oil cylinder of the pinch roll operation side; determining a second additional dead weight compensation value of the pinch roll transmission side based on the reference standard dead weight compensation value of the pinch roll transmission side and a second oil cylinder pressure corresponding to the position of the reference oil cylinder of the pinch roll transmission side;
an obtaining unit 55, configured to obtain a slope value of a curve between a difference between the pressure of the operation side and the pressure of the transmission side of the pinch roll and a variation of a roll gap difference;
and the adjusting unit 56 is used for adjusting the rocker arm precision of the pinch roll based on the curve slope value, the first additional dead weight compensation value and the second additional dead weight compensation value.
The device may be a computer, a server, or other equipment having a computing or storage function. The device may be a stand-alone server, and is not limited herein.
Since the apparatus described in the embodiment of the present invention is an apparatus used for implementing the method in the embodiment of the present invention, a person skilled in the art can understand the specific structure and the deformation of the apparatus based on the method described in the embodiment of the present invention, and thus the detailed description is omitted here. All devices adopted by the method of the embodiment of the invention belong to the protection scope of the invention.
Based on the same inventive concept, the present embodiment provides a computer apparatus 600, as shown in fig. 6, which includes a memory 610, a processor 620 and a computer program 611 stored in the memory 610 and capable of running on the processor 620, and when the processor 620 executes the computer program 611, the following steps are implemented:
determining standard dead weight compensation values corresponding to the positions of target oil cylinders on the operation side and the transmission side of the pinch roll in a working state;
fitting a first curve based on the positions of the target oil cylinders and the corresponding standard dead weight compensation values, wherein the first curve is used for representing the corresponding relation between the positions of the oil cylinders and the standard dead weight compensation values;
controlling the pressure of the pinch roll to zero, and determining the position of a corresponding reference oil cylinder when the pressure of the pinch roll is zero;
determining a pinch roll operation side reference standard dead weight compensation value and a pinch roll transmission side reference standard dead weight compensation value corresponding to the reference oil cylinder position based on the first curve and the reference oil cylinder position;
determining a first additional dead weight compensation value of the pinch roll operation side based on the reference standard dead weight compensation value of the pinch roll operation side and a first oil cylinder pressure corresponding to the position of the reference oil cylinder of the pinch roll operation side;
determining a second additional dead weight compensation value of the pinch roll transmission side based on the reference standard dead weight compensation value of the pinch roll transmission side and a second oil cylinder pressure corresponding to the position of the reference oil cylinder of the pinch roll transmission side;
acquiring a curve slope value between the pressure difference between the operation side and the transmission side of the pinch roll and the roll gap difference variation;
and adjusting the precision of the rocker arm of the pinch roll based on the curve slope value, the first additional self-weight compensation value and the second additional self-weight compensation value.
In a specific implementation, when the processor 620 executes the computer program 611, any of the second embodiment may be implemented.
Since the computer device described in the present embodiment is a device for implementing the method for adjusting the precision of the pinch roller swing arm according to the embodiment of the present application, a person skilled in the art can understand the specific implementation manner of the computer device of the present embodiment and various modifications thereof based on the methods described in the foregoing embodiments of the present application, and therefore, how to implement the method in the embodiment of the present application by the server is not described in detail here. The equipment used by those skilled in the art to implement the methods in the embodiments of the present application is within the scope of the present application.
Based on the same inventive concept, the present embodiment provides a computer-readable storage medium 700, as shown in fig. 7, on which a computer program 711 is stored, the computer program 711 implementing the following steps when being executed by a processor:
determining standard dead weight compensation values corresponding to the positions of target oil cylinders on the operation side and the transmission side of the pinch roll in a working state;
fitting a first curve based on the positions of the target oil cylinders and the corresponding standard dead weight compensation values, wherein the first curve is used for representing the corresponding relation between the positions of the oil cylinders and the standard dead weight compensation values;
controlling the pressure of the pinch roll to zero, and determining the position of a corresponding reference oil cylinder when the pressure of the pinch roll is zero;
determining a reference standard dead weight compensation value of a pinch roll operation side and a reference standard dead weight compensation value of a pinch roll transmission side corresponding to the reference oil cylinder position based on the first curve and the reference oil cylinder position;
determining a first additional dead weight compensation value of the pinch roll operation side based on the reference standard dead weight compensation value of the pinch roll operation side and the first oil cylinder pressure corresponding to the position of the reference oil cylinder of the pinch roll operation side;
determining a second additional dead weight compensation value of the pinch roll transmission side based on the reference standard dead weight compensation value of the pinch roll transmission side and a second oil cylinder pressure corresponding to the position of the reference oil cylinder of the pinch roll transmission side;
acquiring a curve slope value between the pressure difference between the operation side and the transmission side of the pinch roll and the roll gap difference variation;
and adjusting the rocker arm precision of the pinch roll based on the curve slope value, the first additional dead weight compensation value and the second additional dead weight compensation value.
In a specific implementation, the computer program 711 may implement any of the embodiments described above when executed by a processor.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, which is intended to cover any modifications, equivalents, improvements, etc. within the spirit and scope of the present invention.
Claims (10)
1. A method of adjusting the accuracy of a pinch roll rocker arm, the method comprising:
determining standard dead weight compensation values corresponding to the positions of target oil cylinders on the operation side and the transmission side of the pinch roll in a working state;
fitting a first curve based on the positions of the target oil cylinders and the corresponding standard dead weight compensation values, wherein the first curve is used for representing the corresponding relation between the positions of the oil cylinders and the standard dead weight compensation values;
controlling the pressure of the pinch roll to zero, and determining the position of a corresponding reference oil cylinder when the pressure of the pinch roll is zero;
determining a reference standard dead weight compensation value of a pinch roll operation side and a reference standard dead weight compensation value of a pinch roll transmission side corresponding to the reference oil cylinder position based on the first curve and the reference oil cylinder position;
determining a first additional dead weight compensation value of the pinch roll operation side based on the reference standard dead weight compensation value of the pinch roll operation side and a first oil cylinder pressure corresponding to the position of the reference oil cylinder of the pinch roll operation side;
determining a second additional dead weight compensation value of the pinch roll transmission side based on the reference standard dead weight compensation value of the pinch roll transmission side and a second oil cylinder pressure corresponding to the position of the reference oil cylinder of the pinch roll transmission side;
acquiring a curve slope value between the pressure difference between the operation side and the transmission side of the pinch roll and the roll gap difference variation;
and adjusting the precision of the rocker arm of the pinch roll based on the curve slope value, the first additional self-weight compensation value and the second additional self-weight compensation value.
2. The method of claim 1 wherein said determining the standard dead weight compensation values for the operating side and the drive side of the pinch roll at each target cylinder position during operation of the pinch roll comprises:
when the transmission shaft of the pinch roll is in a disengaged state, determining a first self-weight compensation value of the pinch roll corresponding to the position of each target oil cylinder;
when the transmission shaft of the pinch roll is in a connection state, determining a second self-weight compensation value of the pinch roll corresponding to the position of each target oil cylinder;
according to the formula
Determining standard dead weight compensation value G corresponding to the position of each target oil cylinder on the pinch roll operation side in a working state os1 ；
According to
Determining a standard dead weight compensation value G corresponding to the position of each target oil cylinder on the transmission side of the pinch roll in a working state ds1 (ii) a Wherein, the G is 1 For the second pinch roll dead weight compensation value, G 2 And the self weight compensation value of the first pinch roll is obtained.
3. The method of claim 1, wherein said controlling the pressure of said pinch rolls to zero comprises:
controlling the pinch roll to be closed from a fully open position, and resetting the pressure of the pinch roll when the pinch roll is closed to a first preset roll gap;
and controlling the pinch roll to be continuously closed from the first preset roll gap, and when the pressure of the pinch roll reaches a preset target value and the pressure fluctuation of the pinch roll is within a preset range, carrying out zero clearing on the roll gap of the pinch roll.
4. The method of claim 1, wherein said determining a pinch roll operating side reference standard deadweight compensation value and a pinch roll drive side reference standard deadweight compensation value corresponding to said reference cylinder position based on said first curve and said reference cylinder position comprises:
substituting the reference oil cylinder position into the first curve to obtain a reference standard dead weight compensation value G of the pinch roll at the pinch roll operation side corresponding to the reference oil cylinder position os And the reference standard dead weight compensation value G of the transmission side of the pinch roll ds 。
5. The method of claim 1 wherein said determining a first additional deadweight compensation value for said pinch roll operating side based on said reference standard deadweight compensation value for said pinch roll operating side and a first cylinder pressure for said pinch roll operating side corresponding to said reference cylinder position comprises:
according to formula G os2 ＝F co ×k-G os Determining a first additional dead-weight compensation value G of the operating side of the pinch roll os2 (ii) a Wherein, F is co The pressure of a first oil cylinder corresponding to the position of the reference oil cylinder on the operation side of the pinch roll, k is the pressure geometric coefficient of the pinch roll, and G is os And the self-weight compensation value is referred to the operation side of the pinch roll corresponding to the position of the reference oil cylinder.
6. The method of claim 1 wherein said determining a second additional deadweight compensation value for said pinch roll drive side based on said reference standard deadweight compensation value for said pinch roll drive side and a second cylinder pressure corresponding to said reference cylinder position for said pinch roll drive side comprises:
according to formula G ds2 ＝F cd ×k-G ds Determining a second additional dead-weight compensation value G of the drive side of the pinch roll ds2 (ii) a Wherein, F is cd The pressure of a second oil cylinder corresponding to the position of the reference oil cylinder at the transmission side of the pinch roll, k is a geometric coefficient of the pressure of the pinch roll, G ds The self-weight compensation value is a reference standard self-weight compensation value of the pinch roll transmission side corresponding to the position of the reference oil cylinder.
7. The method of claim 1, wherein said adjusting the accuracy of the rocker arm of the pinch roll based on the curvilinear slope value, the first additional gravity compensation value, and the second additional gravity compensation value comprises:
based on the formula
Determining a height difference m between the driving side and the operating side of the pinch roll;
adjusting the height of a rocker arm at the transmission side of the pinch roll or the operation side of the pinch roll according to the height difference; wherein the content of the first and second substances,
the G is ds2 For a second additional dead-weight compensation value of the drive side of the pinch roll, G os2 And n is the curve slope value, and is a first additional dead weight compensation value of the operation side of the pinch roll.
8. A device for adjusting the accuracy of a pinch roll rocker arm, the device comprising:
the first determining unit is used for determining standard dead weight compensation values corresponding to the positions of target oil cylinders on the operation side and the transmission side of the pinch roll in a working state;
the fitting unit is used for fitting a first curve based on the positions of the target oil cylinders and the corresponding standard dead weight compensation values, and the first curve is used for representing the corresponding relation between the positions of the oil cylinders and the standard dead weight compensation values;
the control unit controls the pressure of the pinch roll to be zero and determines the position of a corresponding reference oil cylinder when the pressure of the pinch roll is zero;
the second determining unit is used for determining a reference standard dead weight compensation value of the pinch roll operation side and a reference standard dead weight compensation value of the pinch roll transmission side corresponding to the reference oil cylinder position based on the first curve and the reference oil cylinder position; determining a first additional dead weight compensation value of the pinch roll operation side based on the reference standard dead weight compensation value of the pinch roll operation side and a first oil cylinder pressure corresponding to the position of the reference oil cylinder of the pinch roll operation side; determining a second additional dead weight compensation value of the pinch roll transmission side based on the reference standard dead weight compensation value of the pinch roll transmission side and a second oil cylinder pressure corresponding to the position of the reference oil cylinder of the pinch roll transmission side;
the acquisition unit is used for acquiring a curve slope value between the pressure difference between the operation side and the transmission side of the pinch roll and the roll gap difference variation;
and the adjusting unit is used for adjusting the rocker arm precision of the pinch roll based on the curve slope value, the first additional dead weight compensation value and the second additional dead weight compensation value.
9. A storage medium on which a computer program is stored which, when being executed by a processor, carries out the method of any one of claims 1 to 7.
10. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the method of any of claims 1 to 7 when executing the program.
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