CN113996671B - Method, device, equipment and storage medium for calibrating roll gap of wrapper roll - Google Patents
Method, device, equipment and storage medium for calibrating roll gap of wrapper roll Download PDFInfo
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- CN113996671B CN113996671B CN202111273030.6A CN202111273030A CN113996671B CN 113996671 B CN113996671 B CN 113996671B CN 202111273030 A CN202111273030 A CN 202111273030A CN 113996671 B CN113996671 B CN 113996671B
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- 238000005098 hot rolling Methods 0.000 abstract description 6
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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 comprise the following steps: in the process of pressing a wrapper roller against a winding drum, acquiring a first roll gap zero position corresponding to a continuous change starting point in a pressure-displacement curve formed by acting force and displacement of the winding drum on the wrapper roller; obtaining a second zero position of the roll gap of the auxiliary roll in the current state; determining a third zero roll gap corresponding to the auxiliary roll based on the first zero roll gap and the second zero roll gap; and calibrating the roll gap of the auxiliary roll based on the third roll gap zero position. Because the first zero position of the roll gap is determined according to the starting point of continuous change in the pressure-displacement curve, the pressure value belongs to a relatively changed value, and compared with the prior art that the zero position of the roll gap is determined by adopting the pressure value as a fixed value, the zero position of the roll gap of the auxiliary roll can be more accurately determined by adopting the relatively changed 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 coiling machine is an important device of the hot rolling production line and is responsible for coiling the strip steel on the hot rolling line into steel coils. As shown in fig. 1, the coiler 10 mainly includes pinch rolls, auxiliary rolls, reels 107, and the like. In the head entry phase of the strip 103, the wrapper roller introduces the head of the strip 103 tightly around the reel 107, allowing the strip 103 to enter the coiler continuously under tension until tension is established after the reel 107 is opened. After the tail of the strip steel 103 leaves the pinch roll, the auxiliary roll carries out tail pressing control on the tail of the strip steel 103, so that damage caused by the fact that the tail of the strip steel 103 is thrown and beaten by a coiling machine is avoided, and a steel coil is not automatically loosened until the steel coil is placed on a steel coil lifting device.
The wrapper roller guides the head of the strip steel 103 tightly around the winding drum 107 and performs tail pressing control on the tail of the strip steel 103, and pressure is built up through the gap of the wrapper roller. If the actual wrapper roll gap value is larger than the set value, the wrapper roll does not compact the strip steel in the coiling process, so that the coil shape of the steel coil is poor, the head of the strip steel is not compacted, the friction force is reduced, and the steel coil and the coiling block slip. If the actual roll gap of the auxiliary roll is smaller than the set value, the problems of threading and beating the roll (namely the auxiliary roll impacts the winding drum), coiling and clamping steel and the like are easy to occur when thin steel coils are produced.
In the prior art, when the wrapper roller contacts with the winding drum, the zero position of the gap of the wrapper roller is identified when the speed, the pressure, the torque and the like of the wrapper roller reach set values. However, in the actual production process, the coiling machine has the conditions of uneven wear, mechanical looseness, large equipment clearance, mechanical blockage, static pressure and the like, particularly the problems of distortion, large fluctuation, large error and the like of the speed, the pressure, the torque and the like of the auxiliary roller in the middle and later stages of the service of the coiling machine, and inaccurate speed, pressure, torque and the like are adopted as the judgment standard of the zero position of the auxiliary roller gap, so that the subsequent auxiliary roller gap is inevitably inaccurate in calibration.
Disclosure of Invention
Therefore, the invention aims to solve the technical problem of inaccurate calibration of the subsequent auxiliary roll gap caused by adopting inaccurate data such as speed, pressure, torque and the like as a judging standard of the auxiliary roll gap zero position in the prior art, thereby providing a auxiliary roll gap calibration method for calibrating the roll gap of a coiling machine in the current state, comprising the following steps:
in the process of pressing a wrapper roller against a winding drum, acquiring a first roll gap zero position corresponding to a continuous change starting point in a pressure-displacement curve formed by acting force and displacement of the winding drum on the wrapper roller; obtaining a second zero position of the roll gap of the auxiliary roll in the current state;
determining a third zero roll gap corresponding to the auxiliary roll based on the first zero roll gap and the second zero roll gap; and calibrating the roll gap of the auxiliary roll based on the third roll gap zero position.
Preferably, the determining the third zero roll gap corresponding to the wrapper roll based on the first zero roll gap and the second zero roll gap includes: 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; 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.
Preferably, the second roll gap compensation value is calculated based on the first roll gap compensation value, a first roll gap zero position and a second roll gap zero position, and includes:
calculating to obtain a second roll gap compensation value based on the first roll gap compensation value, a first roll gap zero position and a second roll gap zero position through a first mathematical model; the first mathematical model is:
GB＝GA-(A-B)
the GB represents a second roll gap compensation value, the GA represents a first roll gap compensation value, the A represents a first roll gap zero position, and the B represents a second roll gap zero position.
Preferably, the calibrating the roll gap of the wrapper roll based on the third roll gap zero position includes: acquiring the roll gap size of a wrapper roll corresponding to the preset thickness of the steel coil;
and determining the initial position of the auxiliary winding roller according to the size of the roller gap and the zero position of the third roller gap.
Preferably, the step of obtaining the roll gap size of the auxiliary roll corresponding to the preset thickness of the steel coil includes:
when the auxiliary winding roller is positioned above the central horizontal plane of the winding drum, acquiring the gap between the auxiliary winding roller and the installation device of the auxiliary winding roller, 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 auxiliary roll based on the gap size, the first centrifugal error and the preset thickness of the steel coil;
when the auxiliary winding 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 a second roll gap size of the auxiliary roll based on the second centrifugal error and the preset thickness of the steel coil.
Preferably, the determining the first roll gap size of the auxiliary winding roll 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 auxiliary 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:
H 1 ＝WR+MD 1 +(1.0～1.5)*E
wherein the H is 1 Represents a first roll gap dimension, the WR represents a gap dimension, and the MD represents 1 And the first centrifugal error is represented, and E represents the preset thickness of the steel coil.
Preferably, the determining the second roll gap size of the auxiliary winding roll based on the second centrifugal error and the preset thickness of the steel coil includes:
determining a second roll gap size of the auxiliary roll based on the second centrifugal error and the preset thickness of the steel coil through a third mathematical model; the third mathematical model is:
H 2 ＝MD 2 +(1.0～1.5)*E
wherein the H is 2 Represents a second roll gap dimension, the MD 2 And the second centrifugal error is represented, and E represents the preset thickness of the steel coil.
The invention also provides a device for calibrating the roll gap of the auxiliary winding roll, which is used for calibrating the roll gap of the winding machine in the current state and comprises the following steps:
the acquisition module is used for acquiring a first roll gap zero position corresponding to a continuous change starting point in a pressure-displacement curve formed by acting force and displacement of the winding assisting roller when the winding assisting roller is pressed against the winding drum; obtaining a second zero position of the roll gap of the auxiliary 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 calibrating the roll gap of the auxiliary roll based on the third roll gap zero position.
The present invention also provides a computer device comprising: the device comprises a memory and a processor, wherein the memory and the processor are in communication connection, the memory stores computer instructions, and the processor executes the computer instructions so as to execute the auxiliary roll gap calibration method.
The invention also provides a computer readable storage medium, wherein the computer readable storage medium stores computer instructions, and the computer instructions are used for enabling a computer to execute the auxiliary winding roller gap calibration method.
The technical scheme of the invention has the following advantages:
according to the roll gap calibration method for the auxiliary roll, a first roll gap zero position corresponding to a starting point of continuous change of a pressure-displacement curve of the auxiliary roll in the process of pressing the auxiliary roll against a winding drum is obtained, a second roll gap zero position of the auxiliary roll in a current state is obtained, a third roll gap zero position of the auxiliary roll is determined based on the first roll gap zero position and the second roll gap zero position, and roll gap calibration is carried out on the auxiliary roll by utilizing the third roll gap zero position. Because the first zero position of the roll gap is determined according to the starting point of continuous change in the pressure-displacement curve, the pressure value belongs to a relatively changed value, and compared with the prior art that the zero position of the roll gap is determined by adopting the pressure value as a fixed value, the zero position of the roll gap of the auxiliary roll can be more accurately determined by adopting the relatively changed value.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view showing the structure of a coiler in embodiment 1 of the invention;
FIG. 2 is a flow chart of a method for calibrating a roll gap of a wrapper roll according to embodiment 1 of the present invention;
FIG. 3 is a graph showing the pressure-displacement curve in example 1 of the present invention;
FIG. 4 is a flowchart showing step S102 in FIG. 2;
FIG. 5 is a flowchart showing step S103 in FIG. 2;
FIG. 6 is a block diagram showing a construction of a roll gap calibration apparatus for a wrapper roll according to 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 following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the 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 specifically stated or limited otherwise, the terms "mounted," "connected," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate medium, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to the specific circumstances. In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
The coiling machine is an important device of the hot rolling production line and is responsible for coiling the strip steel on the hot rolling line into steel coils. As shown in fig. 1, a conventional coiler 10 includes pinch rolls, a backup roll, a drum 107, and the like, the pinch rolls including an upper pinch roll 101 and a lower pinch roll 102, the drum 107 including a drum 1071, a plurality of sector plates 1072, and a nip 1073 formed by the sector plates at intervals, and the plurality of sector plates 1072 are provided at intervals on the drum 1071. Strip 103 enters pinch 1073 under the action of upper pinch roll 101 and lower pinch roll 102, and the head end of strip 103 (i.e., the end that first enters the reel) is secured to pinch 1073. The rotation of the drum 107 drives the strip 103 to wind around the outer wall of the sector plate 1072, and the strip 103 is tightly wound around the drum 107 by the aid of the winding roller.
The accuracy of roll gap calibration directly influences the accuracy of roll gap setting, and the coiler is impacted and rubbed by high Wen Daigang, so that the gap between the auxiliary roll, the winding drum and other equipment is increased, and the roll gap of the auxiliary roll needs to be calibrated regularly. At the same time, after the coiling equipment such as a wrapper roll, a winding drum, a sector plate, a hydraulic cylinder and a sensor is replaced, the roll gap calibration is also required.
The accuracy of the roll gap of the auxiliary roll is an important factor for ensuring the quality of the steel coil, and the basis of the roll gap calibration is established on a roll gap zero point, namely, the roll gap calibration is performed by using the roll gap zero point as a reference point, wherein the roll gap of the auxiliary roll refers to the shortest distance between the outer wall of the auxiliary roll and the outer wall of the winding drum (namely, the outer wall of the sector plate 1072). In order to ensure the precision of the roll gap of the auxiliary roll, in the prior art, the zero position of the roll gap of the auxiliary roll is usually identified by adopting a mode of enabling the speed, the pressure, the torque and the like of the auxiliary roll to reach set values, and in the actual production process of a coiling machine, the conditions of abrasion, mechanical looseness, large equipment gap, mechanical clamping groups, static pressure and the like often exist, particularly when the coiling machine is in the middle and later stage of service, the speed, the pressure, the torque and the like of the auxiliary roll have distortion, large fluctuation, large error and the like, the zero position of the roll gap of the auxiliary roll is identified by adopting a mode of enabling the speed, the pressure, the torque and the like of the auxiliary roll to reach set values, and the obtained zero position of the roll gap is inevitably wrong, so that the calibration of the roll gap is wrong, and the quality of a coiled steel coil which is coiled later is low.
Example 1
The embodiment provides a method for calibrating a roll gap of a wrapper roll, and fig. 2 is a flow chart illustrating the accurate calculation of the zero position of the roll gap of the wrapper roll and the calibration of the roll gap by using the zero position of the roll gap according to some embodiments of the invention. While the processes described below include a number of operations that occur in a particular order, it should be clearly understood that the processes may include more or less operations that may be performed sequentially or in parallel (e.g., using a parallel processor or a multi-threaded environment).
The embodiment of the invention provides a method for calibrating a roll gap of a wrapper roll, which is used for calibrating the roll gap of a coiling machine in a current state, wherein the current state is a time node in which factors influencing the zero position of the roll gap, such as the wear degree, the gap size and the like of the coiling machine, remain unchanged, and as shown in fig. 2, the method for calibrating the roll gap of the wrapper roll comprises the following steps:
s101, acquiring a first roll gap zero position corresponding to a continuous change starting point in a pressure-displacement curve formed by acting force and displacement of a winding drum received by a winding assisting roller in the process of pressing the winding assisting roller against the winding drum; and obtaining a second zero position of the roll gap of the auxiliary roll in the current state.
In the above implementation steps, the winding drum is rotated to a proper position, so that the auxiliary winding roller can be pressed on the sector plate of the winding drum, at the moment, the winding drum can be expanded to a steel waiting position, and the auxiliary winding roller is pressed against the winding drum manually or automatically. And recording the corresponding relation between the pressure and displacement of the auxiliary roller in the process of pressing the auxiliary roller against the winding drum by using a data acquisition and analysis system (PDA), forming a pressure-displacement curve of the auxiliary roller, acquiring a starting point for starting continuous change in the pressure-displacement curve, acquiring a value of an auxiliary roller position sensor according to the starting point of continuous change, and recording the acquired value of the auxiliary roller position sensor as a first roller gap zero position.
In this embodiment, the position of the wrapper roller corresponding to the starting point of the continuous change in the pressure-displacement curve is taken as the zero position of the roll gap, and the pressure value used is not a preset fixed value, but is a relative change value, and the fixed 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 auxiliary roll, the obtained zero position of the roll gap can be inaccurate due to the conditions of uneven wear, mechanical looseness, large equipment gap, mechanical blocking, 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 auxiliary roll, so that the obtained zero position of the roll gap is more accurate.
In the process of pressing the auxiliary winding roller against the winding drum, the early-stage curve in the pressure curve is a saw-toothed fluctuation curve due to the existence of influence factors such as a mechanical clamping group, residual stress, friction force and the like, and the curve becomes a smooth continuous curve after the influence factors are eliminated. As shown in fig. 3, after the wrapper roller contacts the winding drum, the wrapper roller continues to press against the winding drum, the winding drum applies a reaction force to the wrapper roller, and the pressure applied to the wrapper roller fluctuates greatly, so that the pressure-displacement curve is a fluctuation curve 202. The influence factor disappears after the auxiliary roller continuously presses the winding drum for a section of displacement, the pressure born by the auxiliary roller does not have fluctuation, the formed pressure-displacement curve is a smooth curve 203, and the starting point 201 of the smooth curve 203 is the continuous change starting point in the pressure-displacement curve.
For example, as shown in fig. 1 and fig. 3, the first wrapper roll 104 is pressed against the winding drum 107 to form a pressure-displacement curve of the first wrapper roll 104, a starting point of continuous change in the pressure-displacement curve is obtained, and a position value of the first wrapper roll 104 when the starting point of continuous change is obtained according to a wrapper roll position sensor is recorded as a first roll gap zero position.
After a certain period of operation of the coiler, the actual zero position of the gap of the auxiliary roller may be displaced. For example, after the coiler is operated for one month, the actual zero position of the gap of the auxiliary roller is changed from the original position M to the position N. And identifying the current zero position of the roll gap of the roll-assisting roller by using a zero position sensor of the roll gap of the roll-assisting roller to obtain the zero position of the roll gap of the roll-assisting roller in the current state, and recording the current zero position of the roll gap of the roll-assisting roller as a second zero position of the roll gap. The current state refers to a state in which the usage (e.g., length of service and wear of parts) of the coiler is unchanged.
S102, determining a third zero gap position corresponding to the wrapper roller based on the first zero gap position and the second zero gap position.
In the implementation step, the first zero position of the roll gap is the accurate zero position of the roll gap of the auxiliary roll in the current state, namely, the quality of the curled steel coil can be ensured by performing roll gap marking under the first zero position of the roll gap. The second zero position of the roll gap is the actual zero position of the roll-up roller in the current state, a third zero position of the roll gap corresponding to the roll-up roller is determined by utilizing the first zero position of the roll gap and the second zero position of the roll gap, and the third zero position of the roll gap is a value obtained after the actual zero position of the roll gap is calibrated. In some embodiments, after the third zero roll gap is determined, the wrapper roll residual stress may be cleared.
S103, calibrating the roll gap of the auxiliary roll based on the third roll gap zero position.
In the implementation step, the roll gap calibration is carried out by adopting the adjusted third roll gap zero position, so that the roll gap calibration quality of the auxiliary winding roller can be improved, and the quality of the coiled steel coil of the coiling machine is improved.
For example, as shown in fig. 1, a first zero a of the first gap of the first wrapper roll 104 is obtained 1 Zero position B of second roll gap 1 Zero position A based on first roll gap 1 Zero position B of second roll gap 1 Determining a third roll gap zero position C of the first wrapper roll 104 1 Third gap zero C based on first wrapper roller 104 1 The first wrapper roller 104 is calibrated for the roll gap.
In the above embodiment, a first zero position of a gap corresponding to a starting point of a continuous change of a pressure-displacement curve of the auxiliary roll is obtained in a process of pressing the auxiliary roll against the winding drum, a second zero position of the auxiliary roll in a current state is obtained, a third zero position of the gap of the auxiliary roll is determined based on the first zero position and the second zero position, and the third zero position is used for calibrating the gap of the auxiliary roll. Because the first zero position of the roll gap is determined according to the starting point of continuous change in the pressure-displacement curve, the pressure value belongs to a relatively changed value, and compared with the prior art that the zero position of the roll gap is determined by adopting the pressure value as a fixed value, the zero position of the roll gap of the auxiliary roll can be more accurately determined by adopting the relatively changed value.
In one or more embodiments, as shown in fig. 4, based on the first zero gap position and the second zero gap position, determining a third zero gap position corresponding to the wrapper roller includes the following steps:
s201, acquiring a first roll gap compensation value input through an input interface.
In the implementation step, the first roll gap compensation value may be determined by an operator according to experience, accuracy of the coiler, and the like, and the operator may input the first roll gap compensation value into the system, for example, through an external device such as a keyboard, a controller, and the like.
S202, judging whether the first roll gap zero position and the second roll gap zero position are equal.
In the implementation step, if the first zero roll gap and the second zero roll gap are equal, step S203 is performed; if the first and second zero roll gap positions are not equal, step S204 is performed.
S203, the third zero position of the roll gap is the sum of the second zero position of the roll gap and the first compensation value of the roll gap.
In the implementation step, zero offset of the zero gap of the auxiliary winding roller may occur along with the production, the original zero gap zero position is not accurate any more, but the production line cannot stop production to recalibrate the zero gap zero position, and at the moment, the zero gap zero position needs to be corrected by modifying the zero gap compensation value. The third zero position is the sum of the second zero position and the first compensation value.
S204, the third zero position of the roll gap is the sum of the second zero position of the roll gap and the second compensation value of the roll gap.
In the implementation step, 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 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)
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. In some embodiments, the first mathematical model may be adaptively modified, such as addition and subtraction constants, uncertainty, and the like.
The second zero position of the roll gap is measured by a zero position sensor of the roll gap, and can be obtained by reading the value of the zero position sensor of the roll gap. When the zero position sensor of the roll gap of the auxiliary roll does not display a numerical value, the effective stroke is shortened due to the gap between the coiling machine and the auxiliary roll, so that the actual zero position of the roll gap is far away from the roll surface of the coiling block, 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 (negative value), the zero position sensor of the roll gap of the auxiliary roll does not display. The first roll gap compensation value may be zeroed and steps S101-S102 may be re-performed.
In one or more embodiments, as shown in fig. 5, the step of obtaining the roll gap size of the auxiliary roll corresponding to the preset thickness of the steel coil includes the following steps:
s301, acquiring the roll gap size of the auxiliary roll corresponding to the preset thickness of the steel coil.
In the implementation step, the preset thickness of the steel coil refers to the thickness of the steel coil formed by the required curling, and the required roll gap size is determined according to the preset thickness of the steel coil. The size of the roll gap refers to the shortest distance between the outer wall of the auxiliary roll and the outer wall of the winding drum (namely the outer wall of the sector plate).
In one or more embodiments, to prevent the problem of threading and rolling of extremely thin gauge (coil thickness +.2.0 mm), the following steps can be used to determine the gap size of the backup roll:
s3011, judging whether the auxiliary winding roller is positioned above the central horizontal plane of the winding drum.
In the implementation step, when the auxiliary winding roller is positioned above the central horizontal plane of the winding drum, the auxiliary winding roller applies pressure to the winding drum from top to bottom, and step S3012 and step S3013 are executed to avoid the condition of threading and rolling; when the auxiliary winding roller is not positioned above the central horizontal plane of the winding drum, the auxiliary winding roller applies pressure to the winding drum from bottom to top, and step S3014 and step S3015 are executed to avoid the situation of threading and rolling.
As shown in fig. 1, the coiler 10 includes 3 auxiliary winding rollers, with the 3 auxiliary winding rollers being equally spaced around the coiler drum 107. In some embodiments, the number of auxiliary winding rollers may be greater than 3, such as 4, 5, or 6, without limitation.
S3012, obtaining the gap between the auxiliary winding roller and the mounting device of the auxiliary winding roller, and obtaining the first centrifugal error of the winding drum.
In the above implementation step, when the auxiliary winding roller is located above the central horizontal plane of the winding drum, not only the centrifugal error of the winding drum will affect the initial position of the auxiliary winding roller, but also the gap between the auxiliary winding roller and the auxiliary winding roller mounting device will affect the initial position of the auxiliary winding roller. The auxiliary winding roller is fixed on a mounting device (not shown), the gap between the auxiliary winding roller and the mounting device is measured, and the gap is recorded as WR; rotating the winding drum at a high speed and observing the diameter change deviation value of the winding drum to obtain a first centrifugal error MD of the winding drum 1 . In actual production, the roundness of the winding drum is different from the roundness of the winding drum due to abrasion, or the clearance of the winding drum can cause the deviation between the diameter of a motion track and the diameter of a set roller, namely the deviation value of the diameter change of the winding drum, in the rotating process of the winding drum.
S3013, determining the first roll gap size of the auxiliary roll based on the gap size, the first centrifugal error and the preset thickness of the steel coil.
In the implementation step, according to the gap size WR and the first centrifugal error MD 1 And the preset thickness E of the steel coil is calculated to obtain the first roll gap size of the auxiliary roll, the first roll gap size can be obtained through a second mathematical model, and the second mathematical model can be as follows:
H 1 ＝WR+MD 1 +(1.0～1.5)*E
wherein the H is 1 Represents the first roll gap dimension, the WR represents the gap size, MD 1 And the first centrifugal error is represented, and E represents the preset thickness of the steel coil. For example, as shown in fig. 1, the first wrapper roll 104 and the second wrapper roll 105 are located on a roll center horizontal plane 1074, and the second mathematical model of the first wrapper roll 104 is: h 1 ＝WR+MD 1 +1.1xe; the second mathematical model of the second wrapper roller 105 is: h 1 ＝WR+MD 1 +1.5*E。
S3014, acquiring a second centrifugal error of the winding drum.
In the above implementation step, when the auxiliary winding roller is not located above the central horizontal plane of the winding drum, only the centrifugal error of the winding drum will affect the initial position of the auxiliary winding roller, the winding drum is rotated at high speed and the diameter variation deviation value of the winding drum is observed to obtain the second centrifugal error MD of the winding drum 2 。
S3015, determining a second roll gap size of the auxiliary winding roll based on the second centrifugal error and the preset thickness of the steel coil.
In the implementation step, according to the second centrifugal error MD 2 And calculating the preset thickness of the steel coil to obtain a second roll gap size of the auxiliary roll, wherein the second roll gap size can be obtained through a third mathematical model, and the third mathematical model can be as follows:
H 2 ＝MD 2 +(1.0～1.5)*E
wherein the H is 2 Represents a second roll gap dimension, the MD 2 And the second centrifugal error is represented, and E represents the preset thickness of the steel coil. For example, as shown in fig. 1, the third wrapper roller 106 is located below the drum center horizontal plane 1074, and the third mathematical model of the third wrapper roller 106 is: h 2 ＝MD 2 +1.2*E。
S302, determining the initial position of the auxiliary winding roller according to the size of the roller gap and the zero position of the third roller gap.
In the implementation step, the initial position of the auxiliary roller is determined according to the obtained size of the roller gap and the zero position of the third roller gap, so that the calibration of the auxiliary roller is completed.
Example 2
The embodiment provides a device for calibrating a roll gap of a wrapper roll, which is used for calibrating the roll gap of a coiling machine in a current state, as shown in fig. 6, and comprises the following steps:
the obtaining module 301 is configured to obtain, during a process that the wrapper roller leans against the winding drum, a first zero position of a roll gap corresponding to a continuous change starting point in a pressure-displacement curve formed by acting force and displacement of the winding drum received by the wrapper roller; obtaining a second zero position of the roll gap of the auxiliary roll in the current state; please refer to the related description of step S101 in embodiment 1 for details, which are not repeated here.
A determining module 302, configured to determine a third zero roll gap corresponding to the wrapper roll based on the first zero roll gap and the second zero roll gap; please refer to the related description of step S102 in embodiment 1 for details, which are not repeated here.
And the calibration module 303 is used for calibrating the roll gap of the auxiliary roll based on the third roll gap zero position. Please refer to the related description of step S103 in embodiment 1 for details, which are not repeated here.
In this embodiment, the obtaining module 301 obtains a first zero position of a gap corresponding to a starting point of a continuous change of a pressure-displacement curve of the auxiliary roll during a process of pressing the auxiliary roll against the winding drum, and obtains a second zero position of the auxiliary roll in a current state, the determining module 302 determines a third zero position of the auxiliary roll based on the first zero position and the second zero position, and the calibration module 303 performs a gap calibration on the auxiliary roll by using the third zero position. Because the first zero position of the roll gap is determined according to the starting point of continuous change in the pressure-displacement curve, the pressure value belongs to a relatively changed value, and compared with the prior art that the zero position of the roll gap is determined by adopting the pressure value as a fixed value, the zero position of the roll gap of the auxiliary roll can be more accurately determined by adopting the relatively changed value.
Example 3
The present embodiment provides a computer device, as shown in fig. 7, which includes a processor 401 and a memory 402, where the processor 401 and the memory 402 may be connected by a bus or other means, and in fig. 7, the connection is exemplified by a bus.
The processor 401 may be a central processing unit (Central Processing Unit, CPU). The processor 401 may also be other general purpose processors, digital signal processors (Digital Signal Processor, DSP), graphics processor (Graphics Processing Unit, GPU), embedded Neural network processor (Neural-network Processing Unit, NPU) or other dedicated deep learning coprocessors, application specific integrated circuits (Application Specific Integrated Circuit, ASIC), field-programmable gate arrays (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc., or a combination of the above.
The memory 402 is used as a non-transitory computer readable storage medium, and may be used to store a non-transitory software program, a non-transitory computer executable program, and modules, such as program instructions/modules (e.g., the acquisition module 301, the determination module 302, and the calibration module 303 shown in fig. 6) corresponding to the wrapper roll gap calibration method in the embodiment of the present invention. The processor 401 executes various functional applications of the processor and data processing by running non-transitory software programs, instructions, and modules stored in the memory 402, that is, implements the wrapper roll gap calibration method in method embodiment 1 described above.
Memory 402 may include a storage program area that may store an operating system, at least one application program required for functionality, and a storage data area; the storage data area may store data created by the processor 401, or the like. In addition, 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, such remote memory being connectable to processor 401 through 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 the wrapper roll gap calibration method of the embodiment shown in fig. 1.
In this embodiment, the memory 402 stores a program instruction or a module of a roll gap calibration method of the auxiliary roll, and when the processor 401 executes the program instruction or the module stored in the memory 402, a first roll gap zero position corresponding to a starting point of a continuous change of a pressure-displacement curve of the auxiliary roll in a process of pressing the auxiliary roll against a winding drum is obtained, a second roll gap zero position of the auxiliary roll in a current state is obtained, a third roll gap zero position of the auxiliary roll is determined based on the first roll gap zero position and the second roll gap zero position, and roll gap calibration is performed on the auxiliary roll by using the third roll gap zero position. Because the first zero position of the roll gap is determined according to the starting point of continuous change in the pressure-displacement curve, the pressure value belongs to a relatively changed value, and compared with the prior art that the zero position of the roll gap is determined by adopting the pressure value as a fixed value, the zero position of the roll gap of the auxiliary roll can be more accurately determined by adopting the relatively changed value.
The embodiment of the invention also provides a computer readable storage medium which stores computer executable instructions capable of executing the auxiliary roll gap calibration method in any of the method embodiments. Wherein the storage medium may be a magnetic Disk, an optical Disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a Flash Memory (Flash Memory), a Hard Disk (HDD), or a Solid State Drive (SSD); the storage medium may also comprise a combination of memories of the kind described above.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (4)
1. The method for calibrating the roll gap of the wrapper roll is used for calibrating the roll gap of the coiling machine in the current state and is characterized by comprising the following steps:
in the process of pressing a wrapper roller against a winding drum, acquiring a first roll gap zero position corresponding to a continuous change starting point in a pressure-displacement curve formed by acting force and displacement of the winding drum on the wrapper roller; obtaining a second zero position of the roll gap of the auxiliary roll in the current state;
determining a third zero roll gap corresponding to the auxiliary roll based on the first zero roll gap and the second zero roll gap;
calibrating the roll gap of the auxiliary roll based on the third roll gap zero position;
wherein, based on the first zero roll gap and the second zero roll gap, determining a third zero roll gap corresponding to the wrapper roll 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; the second roll gap compensation value is calculated based on the first roll gap compensation value, a first roll gap zero position and a second roll gap zero position;
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 comprises:
calculating to obtain a second roll gap compensation value based on the first roll gap compensation value, a first roll gap zero position and a second roll gap zero position through a first mathematical model; the first mathematical model is:
the GB represents a second roll gap compensation value, the GA represents a first roll gap compensation value, the A represents a first roll gap zero position, and the B represents a second roll gap zero position;
the step of calibrating the roll gap of the auxiliary roll based on the third roll gap zero position comprises the following steps:
acquiring the roll gap size of a wrapper roll corresponding to the preset thickness of the steel coil;
determining the initial position of the auxiliary winding roller according to the size of the roller gap and the zero position of the third roller gap;
the step of obtaining the roll gap size of the auxiliary roll corresponding to the preset thickness of the steel coil comprises the following steps:
when the auxiliary winding roller is positioned above the central horizontal plane of the winding drum, acquiring the gap between the auxiliary winding roller and the installation device of the auxiliary winding roller, 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 auxiliary roll based on the gap size, the first centrifugal error and the preset thickness of the steel coil;
when the auxiliary winding 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;
determining a second roll gap size of the auxiliary roll based on the second centrifugal error and the preset thickness of the steel coil;
the determining the first roll gap size of the auxiliary roll based on the gap size, the first centrifugal error and the preset thickness of the steel coil comprises the following steps:
determining a first roll gap size of the auxiliary 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:
wherein the saidRepresents the first roll gap size, the WR represents the gap size, the +.>The first centrifugal error is represented, and E represents the preset thickness of the steel coil;
the determining the second roll gap size of the auxiliary roll based on the second centrifugal error and the preset thickness of the steel coil comprises the following steps:
determining a second roll gap size of the auxiliary roll based on the second centrifugal error and the preset thickness of the steel coil through a third mathematical model; the third mathematical model is:
wherein the saidRepresents a second roll gap dimension, said +.>And the second centrifugal error is represented, and E represents the preset thickness of the steel coil.
2. A wrapper roll gap calibration device, which adopts the wrapper roll gap calibration method as defined in claim 1, and is used for calibrating the roll gap of a coiling machine in the current state, and is characterized by comprising the following steps:
the acquisition module is used for acquiring a first roll gap zero position corresponding to a continuous change starting point in a pressure-displacement curve formed by acting force and displacement of the winding assisting roller when the winding assisting roller is pressed against the winding drum; obtaining a second zero position of the roll gap of the auxiliary 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 calibrating the roll gap of the auxiliary roll based on the third roll gap zero position.
3. A computer device, comprising: the device comprises a memory and a processor, wherein the memory and the processor are in communication connection, the memory stores computer instructions, and the processor executes the computer instructions so as to execute the auxiliary winding roller gap calibration method according to claim 1.
4. A computer-readable storage medium having stored thereon computer instructions for causing a computer to perform the wrapper roll gap calibration method of claim 1.
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