CN113996671A - Wrapper roller gap calibration method, device, equipment and storage medium - Google Patents
Wrapper roller gap calibration method, device, equipment and storage medium Download PDFInfo
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- CN113996671A CN113996671A CN202111273030.6A CN202111273030A CN113996671A CN 113996671 A CN113996671 A CN 113996671A CN 202111273030 A CN202111273030 A CN 202111273030A CN 113996671 A CN113996671 A CN 113996671A
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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
- B21C47/02—Winding-up or coiling
- B21C47/10—Winding-up or coiling by means of a moving guide
- B21C47/14—Winding-up or coiling by means of a moving guide by means of a rotating guide, e.g. laying the material around a stationary reel or drum
- B21C47/146—Controlling or influencing the laying pattern of the coils
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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
- 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 relates to the technical field of hot rolling, in particular to a method, a device, equipment and a storage medium for calibrating a roll gap of a wrapper roll, which comprises the following steps: in the process that the wrapper roller is pressed towards the winding drum, acquiring a first roll gap zero position corresponding to a continuously-changed starting point in a pressure-displacement curve formed by the acting force and the displacement of the wrapper roller from the winding drum; acquiring a second roll gap zero position of the wrapper roll in the current state; determining a third roll gap zero position corresponding to the wrapper roll based on the first roll gap zero position and the second roll gap zero position; and carrying out roll gap calibration on the wrapper roll based on the third roll gap zero position. Because the first roll gap zero position is determined according to the starting point of the continuous change in the pressure-displacement curve, and the pressure value belongs to a relative change value, compared with the prior art in which the pressure value is used as a fixed value to determine the roll gap zero position, the roll gap zero position of the wrapper roll can be more accurately determined by using the relative change value.
Description
Technical Field
The invention relates to the technical field of hot rolling, in particular to a method, a device, equipment and a storage medium for calibrating a roll gap of a wrapper roll.
Background
The coiler is an important device of a hot rolling production line and is responsible for coiling strip steel on the hot rolling production line into a steel coil. As shown in fig. 1, the reeling machine 10 mainly includes a pinch roll, an auxiliary roll, a reel 107, and the like. In the head entry phase of the strip 103, the wrapper rollers guide the head of the strip 103 tightly around the reel 107, so that the strip 103 is continuously tensioned into the coiler until tension is established after the reel 107 is opened. After the tail part of the strip steel 103 leaves the pinch roll, the tail pressing control is carried out on the tail part of the strip steel 103 by the aid of the coiling-assistant roll, so that damage caused by throwing the coiling machine at the tail part of the strip steel 103 is avoided, and a steel coil is not automatically loosened until the steel coil is placed on the steel coil lifting device.
The wrapper rollers lead the head of the strip steel 103 tightly around the winding drum 107 and carry out tail pressing control on the tail of the strip steel 103, and the pressure is built through the roll gaps of the wrapper rollers. If the actual value of the roll gap of the wrapper roll is larger than the set value, the wrapper roll does not compact the strip steel in the coiling process of the strip steel, so that the coil shape of the strip steel is poor, and the friction force is reduced because the head of the strip steel is not compacted, so that the coil steel and a winding drum slip. If the actual roll gap of the wrapper roll is smaller than the set value, the problems of threading and beating the roll (namely, the wrapper roll impacts a winding drum), coiling and steel clamping and the like are easy to occur when the thin-specification steel coil is produced.
In the prior art, when the wrapper roll is in contact with the winding drum, the speed, the pressure, the torque and the like of the wrapper roll are judged to reach set values, and the zero position of the roll gap of the wrapper roll is identified. In the actual production process, however, the coiling machine has the conditions of uneven wear, mechanical looseness, large equipment clearance, mechanical jamming, static pressure and the like, particularly, the problems of distortion, large fluctuation, large error and the like exist in the speed, the pressure, the torque and the like of the wrapper roll in the middle and later service periods of the coiling machine, and inaccurate calibration of the subsequent wrapper roll gap is inevitably caused by adopting inaccurate data of the speed, the pressure, the torque and the like as the judgment standard of the zero position of the wrapper roll gap.
Disclosure of Invention
Therefore, the invention provides a method for calibrating the roll gap of an auxiliary winding roll, which is used for calibrating the roll gap of a coiling machine in the current state and comprises the following steps:
in the process that the wrapper roller is pressed towards the winding drum, acquiring a first roll gap zero position corresponding to a continuously-changed starting point in a pressure-displacement curve formed by the acting force and the displacement of the wrapper roller from the winding drum; acquiring a second roll gap zero position of the wrapper roll in the current state;
determining a third roll gap zero position corresponding to the wrapper roll based on the first roll gap zero position and the second roll gap zero position; and carrying out roll gap calibration on the wrapper roll based on the third roll gap zero position.
Preferably, the determining a third roll gap null corresponding to the wrapper roll based on the first roll gap null and the second roll gap null comprises: acquiring a first roll gap compensation value input through an input interface;
if the first roll gap zero position and the second roll gap zero position are equal, the third roll gap zero position is the sum of the second roll gap zero position and a first roll gap compensation value;
if the first roll gap zero position and the second roll gap zero position are not equal, the third roll gap zero position is the sum of the second roll gap zero position and a second roll gap compensation value; and the second roll gap compensation value is obtained by calculation based on the first roll gap compensation value, the first roll gap zero position and the second roll gap zero position.
Preferably, the second roll gap compensation value is calculated based on the first roll gap compensation value, the first roll gap zero position and the second roll gap zero position, and includes:
calculating to obtain a second roll gap compensation value based on the first roll gap compensation value, the first roll gap zero position and the second roll gap zero position through a first mathematical model; the first mathematical model is:
GB＝GA-(A-B)
wherein GB represents a second roll gap compensation value, GA represents a first roll gap compensation value, A represents a first roll gap zero position, and B represents a second roll gap zero position.
Preferably, the roll gap calibration of the wrapper roll based on the third roll gap zero position includes: acquiring the roll gap size of the auxiliary winding roll corresponding to the preset thickness of the steel coil;
and determining the initial position of the wrapper roll according to the size of the roll gap and the zero position of the third roll gap.
Preferably, the obtaining of the roll gap size of the auxiliary winding roll corresponding to the preset thickness of the steel coil includes:
when the wrapper roll is positioned above the central horizontal plane of the winding drum, acquiring the size of a gap between the wrapper roll and a mounting device of the wrapper roll, and acquiring a first centrifugal error of the winding drum; the first centrifugal error is a diameter change deviation value of the winding drum in a rotating state;
determining a first roll gap size of the wrapper roll based on the gap size, the first centrifugal error and the preset thickness of the steel coil;
when the wrapper roller is positioned at the central horizontal plane of the winding drum and below the central horizontal plane of the winding drum, acquiring a second centrifugal error of the winding drum; the second centrifugal error is a diameter change deviation value of the winding drum in a rotating state; and determining the second roll gap size of the wrapper roll based on the second centrifugal error and the preset thickness of the steel coil.
Preferably, the determining a first gap size of the wrapper roller based on the gap size, the first centrifugal error and the preset thickness of the steel coil includes:
determining a first roll gap size of the wrapper roll based on the gap size, the first centrifugal error and the preset thickness of the steel coil through a second mathematical model; the second mathematical model is:
H1＝WR+MD1+(1.0～1.5)*E
wherein, the H1Representing a first roll gap dimension, the WR representing a gap size, the MD1And E represents the preset thickness of the steel coil.
Preferably, the determining the second roll gap size of the wrapper roll based on the second centrifugal error and the preset thickness of the steel coil comprises:
determining the size of a second roll gap of the wrapper roll through a third mathematical model based on the second centrifugal error and the preset thickness of the steel coil; the third mathematical model is as follows:
H2＝MD2+(1.0～1.5)*E
wherein, the H2Denotes a second roll gap size, the MD2And E represents the preset thickness of the steel coil.
The invention also provides a wrapper roll gap calibration device, which is used for calibrating the roll gap of the coiling machine in the current state and comprises the following components:
the device comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring a first roll gap zero position corresponding to a continuously-changed starting point in a pressure-displacement curve formed by the acting force and displacement of a winding drum when the winding drum is pressed against the winding drum; acquiring a second roll gap zero position of the wrapper roll in the current state;
the determining module is used for determining a third roll gap zero position corresponding to the wrapper roll based on the first roll gap zero position and the second roll gap zero position;
and the calibration module is used for carrying out roll gap calibration on the wrapper roll based on the third roll gap zero position.
The present invention also provides a computer apparatus comprising: the wrapper roll gap calibration method comprises a memory and a processor, wherein the memory and the processor are mutually connected in a communication mode, computer instructions are stored in the memory, and the processor executes the computer instructions so as to execute the wrapper roll gap calibration method.
The invention also provides a computer readable storage medium, which stores computer instructions for causing a computer to execute the wrapper roll gap calibration method.
The technical scheme of the invention has the following advantages:
the invention provides a method for calibrating a roll gap of a wrapper roll, which comprises the steps of acquiring a first roll gap zero position corresponding to a starting point of a pressure-displacement curve of the wrapper roll, which starts to continuously change, in the process of pressing the wrapper roll against a winding drum, acquiring a second roll gap zero position of the wrapper roll in the current state, determining a third roll gap zero position of the wrapper roll based on the first roll gap zero position and the second roll gap zero position, and calibrating the roll gap of the wrapper roll by using the third roll gap zero position. Because the first roll gap zero position is determined according to the starting point of the continuous change in the pressure-displacement curve, and the pressure value belongs to a relative change value, compared with the prior art in which the pressure value is used as a fixed value to determine the roll gap zero position, the roll gap zero position of the wrapper roll can be more accurately determined by using the relative change value.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic view showing the structure of a coiler in example 1 of the present invention;
FIG. 2 is a flowchart of a method for calibrating a roll gap of an auxiliary winding roll in embodiment 1 of the present invention;
FIG. 3 is a schematic view of a pressure-displacement curve in example 1 of the present invention;
FIG. 4 is a flowchart illustrating a detailed process of step S102 in FIG. 2;
FIG. 5 is a flowchart illustrating a detailed process of step S103 in FIG. 2;
FIG. 6 is a block diagram of a roll gap calibration apparatus of an auxiliary winding roll in embodiment 2 of the present invention;
fig. 7 is a schematic block diagram of a computer device according to embodiment 3 of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Unless expressly stated or limited otherwise, the terms "mounted," "connected," "coupled," and the like are to be construed broadly and encompass, for example, both fixed and removable coupling or integral coupling; they may be directly connected or indirectly connected through an intermediate, and those skilled in the art can understand the specific meaning of the above terms in the present invention according to specific situations. In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The coiler is an important device of a hot rolling production line and is responsible for coiling strip steel on the hot rolling production line into a steel coil. As shown in fig. 1, a conventional recoiling machine 10 includes a pinch roll, a wrapper roll, a reel 107, and the like, the pinch roll includes an upper pinch roll 101 and a lower pinch roll 102, the reel 107 includes a reel body 1071, a plurality of sector plates 1072, and a nip 1073 formed by the sector plates at intervals, it should be noted that the sector plates 1072 are disposed at intervals on the reel body 1071. The strip 103 enters the pinch 1073 by the upper pinch roll 101 and the lower pinch roll 102, and the head end of the strip 103 (i.e. the end that enters the drum first) is fixed to the pinch 1073. The reel 107 rotates to wind the strip steel 103 on the outer wall of the sector plate 1072, and the strip steel 103 is tightly wound around the reel 107 by the aid of the auxiliary winding roller.
The accuracy of roll gap calibration directly influences the accuracy of roll gap setting, and the impact and friction of high-temperature strip steel on a coiling machine cause the clearance of devices such as a wrapper roll and a winding drum to be increased, so that the roll gap of the wrapper roll needs to be calibrated regularly. Meanwhile, after the reeling equipment such as the auxiliary reeling roller, the reeling drum, the sector plate, the hydraulic cylinder and the sensor are replaced, the roll gap calibration is also needed.
The precision of the roll gap of the wrapper roll is an important factor for ensuring the quality of a steel coil, and the basis of roll gap calibration is established on the zero point of the roll gap, namely, the roll gap calibration is carried out by using the zero point of the roll gap as a reference point, wherein the roll gap of the wrapper roll is the shortest distance between the outer wall of the wrapper roll and the outer wall of a winding drum (namely the outer wall of the sector plate 1072). In order to ensure the precision of the seam of the wrapper roller, the zero position of the seam of the wrapper roller is usually identified by adopting a mode of enabling the speed, the pressure, the torque and the like of the wrapper roller to reach set values in the prior art, the situations of abrasion, mechanical looseness, large equipment clearance, mechanical clamping, static pressure and the like frequently exist in the actual production process of a coiler, especially the situations of distortion, large fluctuation, large error and the like of the speed, the pressure, the torque and the like of the wrapper roller when the coiler is in the middle and later stages of service, the zero position of the seam of the wrapper roller is identified by adopting a mode of enabling the speed, the pressure, the torque and the like of the wrapper roller to reach the set values, and the obtained zero position of the seam inevitably has errors, so that the calibration of the seam also has errors, and further the quality of a subsequent coiled steel coil is low.
Example 1
The embodiment provides a method for calibrating a roll gap of an auxiliary winding roll, and fig. 2 is a flowchart for explaining the steps of accurately calculating a zero position of the roll gap of the auxiliary winding roll and calibrating the roll gap by using the zero position of the roll gap according to some embodiments of the invention. Although the processes described below include operations that occur in a particular order, it should be clearly understood that the processes may include more or fewer operations that are performed sequentially or in parallel (e.g., using parallel processors or a multi-threaded environment).
The embodiment of the invention provides a method for calibrating a roll gap of an auxiliary winding roll, which is used for calibrating the roll gap of a coiling machine in the current state, wherein the current state refers to a time node at which factors influencing the zero position of the roll gap, such as the abrasion degree and the gap size of the coiling machine, are kept unchanged, and as shown in figure 2, the method for calibrating the roll gap of the auxiliary winding roll comprises the following steps:
s101, in the process that the wrapper roller is pressed towards a winding drum, acquiring a first roll gap zero position corresponding to a continuously-changed starting point in a pressure-displacement curve formed by the acting force and displacement of the wrapper roller from the winding drum; and acquiring a second roll gap zero position of the wrapper roll in the current state.
In the above-mentioned implementation steps, the reel is rotated to a proper position, so that the auxiliary winding roller can be pressed on the sector plates of the reel, at the moment, the reel can be expanded to a steel waiting position, and the auxiliary winding roller is pressed towards the reel in a manual or automatic mode. Recording the corresponding relation between the pressure and the displacement of the wrapper roller in the process of pressing the wrapper roller against a winding drum by using a data acquisition and analysis system (PDA), forming a pressure-displacement curve of the wrapper roller, acquiring a starting point of continuous change in the pressure-displacement curve, acquiring the value of a position sensor of the wrapper roller according to the starting point of the continuous change, and recording the acquired value of the position sensor of the wrapper roller as a first roll gap zero position.
In this embodiment, the wrapper roller position corresponding to the starting point of the pressure-displacement curve, at which the continuous change starts, is used as the zero position of the roll gap, and the pressure value used is not a preset constant value, but a relative change value, where the constant value may have an error, but the relative value is accurate. In the prior art, a preset pressure value is adopted to identify the zero position of the roll gap of the wrapper roll, the obtained zero position of the roll gap is inaccurate due to the conditions of uneven wear, mechanical looseness, large equipment clearance, mechanical jamming, static pressure and the like of a coiling machine, and the embodiment adopts a relatively changed pressure value to identify the zero position of the roll gap of the wrapper roll, so that the obtained zero position of the roll gap is more accurate.
In the process that the wrapper roll is pressed against the winding drum, due to the existence of mechanical clamping groups, residual stress, friction and other influence factors, the curve at the early stage in the pressure curve is a sawtooth-shaped fluctuation curve, and the curve is changed into a smooth continuous curve after the influence factors are eliminated. As shown in fig. 3, after the wrapper roller contacts with the winding drum, the wrapper roller continues to press against the winding drum, the winding drum applies a reaction force to the wrapper roller, the pressure applied to the wrapper roller fluctuates greatly, and the formed pressure-displacement curve is a fluctuation curve 202. After the wrapper roller continuously presses the winding drum for a section of displacement, the influence factors disappear, the pressure applied to the wrapper roller does not fluctuate, the formed pressure-displacement curve is a smooth curve 203, and the starting point 201 of the smooth curve 203 is the starting point of continuous change in the pressure-displacement curve.
For example, as shown in fig. 1 and fig. 3, the first wrapper roller 104 is pressed against the winding drum 107 to form a pressure-displacement curve of the first wrapper roller 104, a starting point of starting continuous change in the pressure-displacement curve is obtained, and the position value of the first wrapper roller 104 is recorded as a first zero roll gap position according to the position value of the first wrapper roller 104 when the starting point of continuous change is obtained by the wrapper roller position sensor.
After the recoiling machine works for a period of time, the actual zero position of the roll gap of the wrapper roll can be displaced. For example, after the recoiling machine works for one month, the actual zero position of the roll gap of the wrapper roll is changed from the original position M to the position N. The method comprises the steps of identifying the current roll gap zero position of the wrapper roll by using a wrapper roll gap zero position sensor to obtain the roll gap zero position of the wrapper roll in the current state, and recording the current roll gap zero position of the wrapper roll as a second roll gap zero position. It should be noted that the current state refers to a state in which the usage (such as service life and wear of parts) of the coiler is not changed.
S102, determining a third roll gap zero position corresponding to the wrapper roll based on the first roll gap zero position and the second roll gap zero position.
In the implementation steps, the first roll gap zero position is the accurate roll gap zero position of the wrapper roll in the current state, namely, the roll gap calibration is carried out at the first roll gap zero position, so that the quality of the coiled steel coil can be ensured. And the second roll gap zero position is the actual roll gap zero position of the wrapper roll in the current state, the third roll gap zero position corresponding to the wrapper roll is determined by utilizing the first roll gap zero position and the second roll gap zero position, and the third roll gap zero position is a value obtained by calibrating the actual roll gap zero position. In some embodiments, after determining the third roll gap null, the wrapper roll residual stress may be cleared.
S103, roll gap calibration is carried out on the wrapper roll based on the third roll gap zero position.
In the implementation steps, the adjusted zero position of the third roll gap is adopted for roll gap calibration, so that the roll gap calibration quality of the wrapper roll can be improved, and the quality of a steel coil curled by the coiler is improved.
For example, as shown in FIG. 1, a first zero gap position A of the first wrapper roller 104 is obtained1Second roll gap zero position B1Based on the first roll gap zero position A1Second roll gap zero position B1Determining the third roll gap zero position C of the first wrapper roll 1041Third roll gap zero position C based on first wrapper roll 1041The first wrapper roller 104 is roll gap calibrated.
In the above embodiment, a first zero roll gap position corresponding to a starting point at which a pressure-displacement curve of the wrapper roll starts to continuously change in the process of pressing the wrapper roll against the winding drum is obtained, a second zero roll gap position of the wrapper roll in the current state is obtained, a third zero roll gap position of the wrapper roll is determined based on the first zero roll gap position and the second zero roll gap position, and roll gap calibration is performed on the wrapper roll by using the third zero roll gap position. Because the first roll gap zero position is determined according to the starting point of the continuous change in the pressure-displacement curve, and the pressure value belongs to a relative change value, compared with the prior art in which the pressure value is used as a fixed value to determine the roll gap zero position, the roll gap zero position of the wrapper roll can be more accurately determined by using the relative change value.
In one or more embodiments, as shown in fig. 4, determining a third zero-roll gap position corresponding to the wrapper roll based on the first zero-roll gap position and the second zero-roll gap position includes the following steps:
s201, acquiring a first roll gap compensation value input through an input interface.
In the above implementation steps, the first roll gap compensation value may be determined by an operator according to experience, precision of the coiler, and the like, and the operator may input the first roll gap compensation value into the system, for example, by using peripheral devices such as a keyboard and a manipulator.
S202, judging whether the first roll gap zero position and the second roll gap zero position are equal.
In the above implementation step, if the first zero roll gap position and the second zero roll gap position are equal, step S203 is executed; if the first roll gap zero position and the second roll gap zero position are not equal, step S204 is executed.
S203, the third roll gap zero position is the sum of the second roll gap zero position and the first roll gap compensation value.
In the implementation steps, zero offset may occur in the zero position of the roll gap of the wrapper roll along with the progress of production, the original zero position of the roll gap is no longer accurate, but the production line cannot stop production to recalibrate the zero position of the roll gap, and at this time, the zero position of the roll gap needs to be corrected by modifying a roll gap compensation value. Namely, when the first roll gap zero position and the second roll gap zero position are equal, the third roll gap zero position is the sum of the second roll gap zero position and the first roll gap compensation value.
S204, the third roll gap zero position is the sum of the second roll gap zero position and the second roll gap compensation value.
In the foregoing implementation steps, the second roll gap compensation value is calculated based on the first roll gap compensation value, the first roll gap zero position, and the second roll gap compensation value may be calculated by using a first mathematical model, where the first mathematical model is:
GB＝GA-(A-B)
and GB represents a second roll gap compensation value, GA represents a first roll gap compensation value, A represents a first roll gap zero position, and B represents a second roll gap zero position. In some embodiments, the first mathematical model may be adapted, such as adding or subtracting constants, indeterminate numbers, and the like.
It should be noted that the second roll gap zero position is obtained by measurement of the wrapper roll gap zero position sensor, that is, the value of the wrapper roll gap zero position sensor can be read to obtain the second roll gap zero position. When the zero position sensor of the roll gap of the wrapper roll does not display the value, the effective stroke of the gap between the coiling machine and the wrapper roll is shortened, the actual zero position of the roll gap is far away from the roll surface of the winding drum, namely the zero position of the second roll gap is a negative value, and when the value of the zero position of the second roll gap reaches a certain value (the negative value), the zero position sensor of the roll gap of the wrapper roll does not display the value. The first roll gap compensation value may be zeroed and steps S101-S102 may be re-executed.
In one or more embodiments, as shown in fig. 5, the obtaining of the roll gap size of the auxiliary winding roll corresponding to the preset thickness of the steel coil includes the following steps:
s301, acquiring the roll gap size of the auxiliary winding roll corresponding to the preset thickness of the steel coil.
In the above implementation steps, the preset thickness of the steel coil refers to the thickness of the steel coil required to be curled, and the required size of the roll gap is determined according to the preset thickness of the steel coil. Wherein, the roll gap size refers to the shortest distance between the outer wall of the winding roll and the outer wall of the winding drum (namely the outer wall of the sector plate).
In one or more embodiments, in order to prevent the problem of threading and rolling of extremely thin specifications (the thickness of a steel coil is less than or equal to 2.0mm), the roll gap size of the wrapper roll can be determined by adopting the following steps:
s3011, judging whether the wrapper roll is located above the horizontal plane of the center of the winding drum.
In the implementation step, when the wrapper roller is located above the horizontal plane of the center of the winding drum, the wrapper roller applies pressure to the winding drum from top to bottom, and step S3012 and step S3013 are executed to avoid threading and rolling; and when the wrapper roll is not positioned above the horizontal plane of the center of the winding drum, the wrapper roll exerts pressure on the winding drum from bottom to top, and the step S3014 and the step S3015 are executed to avoid the situation of threading and rolling.
As shown in fig. 1, the coiler 10 includes 3 wrapper rollers, and the 3 wrapper rollers are wrapped around the winding drum 107 at equal intervals. In some embodiments, the number of wrapper rollers may be greater than 3, such as 4, 5, or 6, without limitation.
S3012, obtaining the size of a gap between the wrapper roll and the installation device of the wrapper roll, and obtaining a first centrifugal error of the winding drum.
In the above implementation steps, when the wrapper roller is located above the horizontal plane of the center of the winding drum, not only the centrifugal error of the winding drum will affect the initial position of the wrapper roller, but also the gap between the wrapper roller and the wrapper roller mounting device will affect the initial position of the wrapper roller. The wrapper roll is fixed on a mounting device (not shown), the size of a gap between the wrapper roll and the mounting device is measured, and the size of the gap is written as WR; rotating the reel at high speed and observing the diameter variation deviation value of the reel to obtain a first centrifugal error MD of the reel1. In actual production, the winding drum is groundThe roundness of each position of the winding drum is different due to damage, or the winding drum has gaps, so that the diameter of the motion track and the set roller diameter have deviation in the rotating process of the winding drum, namely the diameter change deviation value of the winding drum.
S3013, determining a first roll gap size of the wrapper roll based on the gap size, the first centrifugal error and the preset thickness of the steel coil.
In the above implementation steps, the gap WR and the first centrifugal error MD are determined according to1And calculating the preset thickness E of the steel coil to obtain the first roll gap size of the wrapper roller, wherein the first roll gap size can be obtained through a second mathematical model, and the second mathematical model can be as follows:
H1＝WR+MD1+(1.0～1.5)*E
wherein, the H1Denotes the first gap dimension, WR denotes the gap size, MD1And E represents the preset thickness of the steel coil. For example, as shown in fig. 1, the first wrapper roller 104 and the second wrapper roller 105 are located on the roll center horizontal plane 1074, and the second mathematical model of the first wrapper roller 104 is: h1＝WR+MD1+1.1 × E; the second mathematical model of the second wrapper roller 105 is: h1＝WR+MD1+1.5*E。
And S3014, acquiring a second centrifugal error of the winding drum.
In the above implementation steps, when the wrapper roller is not located above the horizontal plane of the center of the reel drum, only the centrifugal error of the reel drum will affect the initial position of the wrapper roller, the reel drum is rotated at a high speed, and the diameter variation deviation value of the reel drum is observed to obtain the second centrifugal error MD of the reel drum2。
S3015, determining the size of a second roll gap of the wrapper roll based on the second centrifugal error and the preset thickness of the steel coil.
In the above implementation step, the second centrifugal error MD is used2And the steel coil is preset with the thickness calculation and is obtained the second roll gap size of the wrapper roll, accessible third mathematical model obtains the second roll gap size, and the third mathematical model can be:
H2＝MD2+(1.0～1.5)*E
wherein, the H2Denotes a second roll gap size, the MD2And E represents the preset thickness of the steel coil. For example, as shown in fig. 1, the third wrapper roll 106 is located below the roll center level 1074, and the third mathematical model of the third wrapper roll 106 is: h2＝MD2+1.2*E。
S302, determining the initial position of the wrapper roll according to the roll gap size and the zero position of the third roll gap.
In the implementation steps, the initial position of the wrapper roll is determined according to the obtained roll gap size and the zero position of the third roll gap, so that the calibration of the wrapper roll is completed.
Example 2
The embodiment provides a wrapper roll gap calibration device, which is used for calibrating a roll gap of a coiler in a current state, and as shown in fig. 6, the wrapper roll gap calibration device includes:
the acquisition module 301 is configured to acquire a first roll gap zero position corresponding to a continuously changing starting point in a pressure-displacement curve formed by drum acting force and displacement of the wrapper roller when the wrapper roller is pressed against a drum; acquiring a second roll gap zero position of the wrapper roll in the current state; for details, please refer to the related description of step S101 in embodiment 1, which is not repeated herein.
A determining module 302, configured to determine a third zero-position of the seam corresponding to the wrapper roll based on the first zero-position of the seam and the second zero-position of the seam; for details, please refer to the related description of step S102 in embodiment 1, which is not repeated herein.
And the calibration module 303 is configured to perform roll gap calibration on the wrapper roll based on the third zero roll gap position. For details, please refer to the related description of step S103 in embodiment 1, which is not repeated herein.
In this embodiment, the obtaining module 301 obtains a first zero roll gap position corresponding to a starting point at which a pressure-displacement curve of the wrapper roll starts to continuously change in the process of pressing the wrapper roll against the winding drum, and obtains a second zero roll gap position of the wrapper roll in the current state, the determining module 302 determines a third zero roll gap position of the wrapper roll based on the first zero roll gap position and the second zero roll gap position, and the calibrating module 303 performs roll gap calibration on the wrapper roll by using the third zero roll gap position. Because the first roll gap zero position is determined according to the starting point of the continuous change in the pressure-displacement curve, and the pressure value belongs to a relative change value, compared with the prior art in which the pressure value is used as a fixed value to determine the roll gap zero position, the roll gap zero position of the wrapper roll can be more accurately determined by using the relative change value.
Example 3
The present embodiment provides a computer device, as shown in fig. 7, the computer device includes a processor 401 and a memory 402, where the processor 401 and the memory 402 may be connected by a bus or by other means, and fig. 7 takes the connection by the bus as an example.
The memory 402, which is a non-transitory computer-readable storage medium, may be used to store non-transitory software programs, non-transitory computer-executable programs, and modules, such as program instructions/modules (e.g., the obtaining module 301, the determining module 302, and the calibrating module 303 shown in fig. 6) corresponding to the wrapper roll gap calibrating method in the embodiment of the present invention. The processor 401 executes various functional applications and data processing of the processor by running the non-transitory software programs, instructions and modules stored in the memory 402, that is, the wrapper roll gap calibration method in the above method embodiment 1 is implemented.
The memory 402 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created by the processor 401, and the like. Further, the memory 402 may include high speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, memory 402 may optionally include memory located remotely from processor 401, which may be connected to processor 401 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The one or more modules are stored in the memory 402 and, when executed by the processor 401, perform a wrapper roll gap calibration method as in the embodiment of FIG. 1.
In this embodiment, the memory 402 stores a program instruction or a module of the wrapper roll gap calibration method, and when the processor 401 executes the program instruction or the module stored in the memory 402, the processor 401 obtains a first roll gap zero position corresponding to a starting point at which a pressure-displacement curve of the wrapper roll starts to continuously change in a process of pressing the wrapper roll toward a winding drum, obtains a second roll gap zero position of the wrapper roll in a current state, determines a third roll gap zero position of the wrapper roll based on the first roll gap zero position and the second roll gap zero position, and performs roll gap calibration on the wrapper roll by using the third roll gap zero position. Because the first roll gap zero position is determined according to the starting point of the continuous change in the pressure-displacement curve, and the pressure value belongs to a relative change value, compared with the prior art in which the pressure value is used as a fixed value to determine the roll gap zero position, the roll gap zero position of the wrapper roll can be more accurately determined by using the relative change value.
The embodiment of the invention also provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions can execute the wrapper roll gap calibration method in any method embodiment. The storage medium may be a magnetic Disk, an optical Disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a Flash Memory (Flash Memory), a Hard Disk (Hard Disk Drive, abbreviated as HDD), a Solid State Drive (SSD), or the like; the storage medium may also comprise a combination of memories of the kind described above.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. A wrapper roll gap calibration method is used for calibrating the roll gap of a coiling machine in the current state, and is characterized by comprising the following steps:
in the process that the wrapper roller is pressed towards the winding drum, acquiring a first roll gap zero position corresponding to a continuously-changed starting point in a pressure-displacement curve formed by the acting force and the displacement of the wrapper roller from the winding drum; acquiring a second roll gap zero position of the wrapper roll in the current state;
determining a third roll gap zero position corresponding to the wrapper roll based on the first roll gap zero position and the second roll gap zero position;
and carrying out roll gap calibration on the wrapper roll based on the third roll gap zero position.
2. The roll gap calibration method of claim 1, wherein determining a third roll gap null corresponding to the wrapper roll based on the first roll gap null and the second roll gap null comprises:
acquiring a first roll gap compensation value input through an input interface;
if the first roll gap zero position and the second roll gap zero position are equal, the third roll gap zero position is the sum of the second roll gap zero position and a first roll gap compensation value;
if the first roll gap zero position and the second roll gap zero position are not equal, the third roll gap zero position is the sum of the second roll gap zero position and a second roll gap compensation value; and the second roll gap compensation value is obtained by calculation based on the first roll gap compensation value, the first roll gap zero position and the second roll gap zero position.
3. The roll gap calibration method according to claim 2, wherein the second roll gap compensation value is calculated based on the first roll gap compensation value, the first zero roll gap position and the second zero roll gap position, and comprises:
calculating to obtain a second roll gap compensation value based on the first roll gap compensation value, the first roll gap zero position and the second roll gap zero position through a first mathematical model; the first mathematical model is:
GB＝GA-(A-B)
wherein GB represents a second roll gap compensation value, GA represents a first roll gap compensation value, A represents a first roll gap zero position, and B represents a second roll gap zero position.
4. The roll gap calibration method according to any one of claims 1 to 3, wherein the roll gap calibration of the wrapper roll based on the third roll gap zero position comprises:
acquiring the roll gap size of the auxiliary winding roll corresponding to the preset thickness of the steel coil;
and determining the initial position of the wrapper roll according to the size of the roll gap and the zero position of the third roll gap.
5. The roll gap calibration method according to any one of claims 1 to 4, wherein the obtaining of the roll gap size of the auxiliary winding roll corresponding to the preset thickness of the steel coil comprises:
when the wrapper roll is positioned above the central horizontal plane of the winding drum, acquiring the size of a gap between the wrapper roll and a mounting device of the wrapper roll, and acquiring a first centrifugal error of the winding drum; the first centrifugal error is a diameter change deviation value of the winding drum in a rotating state;
determining a first roll gap size of the wrapper roll based on the gap size, the first centrifugal error and the preset thickness of the steel coil;
when the wrapper roller is positioned at the central horizontal plane of the winding drum and below the central horizontal plane of the winding drum, acquiring a second centrifugal error of the winding drum; the second centrifugal error is a diameter change deviation value of the winding drum in a rotating state;
and determining the second roll gap size of the wrapper roll based on the second centrifugal error and the preset thickness of the steel coil.
6. The roll gap calibration method according to claim 5, wherein the determining a first roll gap dimension of the wrapper roller based on the gap size, the first centrifugal error and the preset thickness of the steel coil comprises:
determining a first roll gap size of the wrapper roll based on the gap size, the first centrifugal error and the preset thickness of the steel coil through a second mathematical model; the second mathematical model is:
H1＝WR+MD1+(1.0～1.5)*E
wherein, the H1Representing a first roll gap dimension, the WR representing a gap size, the MD1And E represents the preset thickness of the steel coil.
7. The roll gap calibration method according to claim 5, wherein the determining a second roll gap size of the wrapper roll based on the second centrifugal error and the preset thickness of the steel coil comprises:
determining the size of a second roll gap of the wrapper roll through a third mathematical model based on the second centrifugal error and the preset thickness of the steel coil; the third mathematical model is as follows:
H2＝MD2+(1.0～1.5)*E
wherein, the H2Denotes a second roll gap size, the MD2And E represents the preset thickness of the steel coil.
8. The utility model provides a wrapper roll gap calibration device for carry out the calibration to the roll gap of coiling machine under the current condition, its characterized in that includes:
the device comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring a first roll gap zero position corresponding to a continuously-changed starting point in a pressure-displacement curve formed by the acting force and displacement of a winding drum when the winding drum is pressed against the winding drum; acquiring a second roll gap zero position of the wrapper roll in the current state;
the determining module is used for determining a third roll gap zero position corresponding to the wrapper roll based on the first roll gap zero position and the second roll gap zero position;
and the calibration module is used for carrying out roll gap calibration on the wrapper roll based on the third roll gap zero position.
9. A computer device, comprising: a memory and a processor, the memory and the processor being communicatively connected to each other, the memory storing computer instructions, and the processor executing the computer instructions to perform the wrapper roll gap calibration method according to any one of claims 1 to 7.
10. A computer readable storage medium having stored thereon computer instructions for causing a computer to perform the wrapper roll gap calibration method of any one of claims 1-7.
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