A method for detecting roll gap calibration of a coiler lap roller

Abstract

The application provides a kind of coiler assisting roll gap calibration detection method, the method comprises: after the roll gap value between the assisting roll and mandrel is completed calibration, the roll gap value between the assisting roll and mandrel is adjusted to roll gap set value;Controlling the assisting roll and mandrel to rotate at different speeds, if there is no exception, stop rotating;Adjust the roll gap value between the assisting roll and mandrel until the current pressure value of the surface of the assisting roll reaches the preset pressure value and stops adjusting;Control the mandrel and the assisting roll to rotate, if the current pressure value of the surface of the assisting roll is stable, record the roll gap value between the mandrel and the assisting roll, and judge the accuracy of the assisting roll calibration.The scheme provided in the application can detect the calibration effect of the assisting roll after the assisting roll is calibrated, judge the accuracy of the assisting roll calibration, reduce or avoid accidents in subsequent production, ensure the stable production and quality of the subsequent strip steel, and improve the production efficiency of the unit.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rolling steel, in particular to a detection method for roll gap calibration of a coiler assisting roll. BACKGROUND

[0002] The coiler assisting roll of a hot continuous rolling sheet line coiler works in a harsh environment of high temperature, high humidity, high pressure and high speed for a long time, and the corrosion and wear of each component are relatively fast; the position measurement device also has a zero drift phenomenon due to frequent impact of the strip head and high pressure work; which may cause inaccurate calibration when calibrating the roll gap, and if it is not found in time, when the roll gap deviation of the coiler assisting roll increases, the accumulated deviation value cannot meet the production requirements of the product variety and specification, and product quality or production accidents may occur. However, so far, there is no clear effect evaluation and judgment method for the roll gap calibration of the coiler assisting roll of the domestic and foreign plate and strip production line.

[0003] Therefore, how to use an effective method to detect and judge the calibration result after the roll gap calibration of the coiler assisting roll to ensure the high-quality and stable production of the subsequent strip steel is a technical problem to be solved urgently. SUMMARY

[0004] The purpose of the present application is to provide a detection method for roll gap calibration of a coiler assisting roll, and the scheme provided by the present application can detect the calibration effect of the coiler assisting roll after calibration, judge the accuracy of the calibration of the coiler assisting roll, reduce or avoid accidents in subsequent production, ensure the stable production and quality of the subsequent strip steel, and improve the production efficiency of the unit.

[0005] Specifically, the present application adopts the following technical scheme:

[0006] According to an aspect of some embodiments of the present application, a method for detecting roll gap calibration of a coiler assist roll is provided. The coiler includes a mandrel and at least one assist roll. The method includes: S1, after roll gap calibration between the assist roll and the mandrel is completed, adjusting the roll gap between the assist roll and the mandrel to a roll gap set value; S2, controlling the assist roll and the mandrel to rotate at a first preset speed, if there is no impact or current exceeding standard between the assist roll and the mandrel, controlling the assist roll and the mandrel to rotate at a second preset speed, if there is no impact or current exceeding standard between the assist roll and the mandrel within a preset time, controlling the assist roll and the mandrel to stop rotating; S3, adjusting the roll gap between the assist roll and the mandrel until the current pressure value of the surface of the assist roll reaches a preset pressure value; S4, controlling the assist roll and the mandrel to rotate at a third preset speed, if the current pressure value of the surface of the assist roll is stable, recording the roll gap between the assist roll and the mandrel as a reference roll gap value; and S5, judging the accuracy of the calibration of the assist roll based on the reference roll gap value.

[0007] In some embodiments of the present application, based on the foregoing scheme, the first preset speed is less than the second preset speed.

[0008] In some embodiments of the present application, based on the foregoing scheme, the method further includes: when the mandrel and the assist roll are controlled to rotate at the first preset speed, if there is impact or current exceeding standard between the assist roll and the mandrel, returning to the step S1 to re-calibrate the roll gap value until there is no impact or current exceeding standard between the assist roll and the mandrel when the assist roll and the mandrel rotate at the first preset speed.

[0009] In some embodiments of the present application, based on the foregoing scheme, the method further includes: when the mandrel and the assist roll are controlled to rotate at the second preset speed, if there is impact or current exceeding standard between the assist roll and the mandrel within a preset time, returning to the step S1 to re-calibrate the roll gap value until there is no impact or current exceeding standard between the assist roll and the mandrel within a preset time when the assist roll and the mandrel rotate at the second preset speed.

[0010] In some embodiments of the present application, based on the foregoing scheme, the method further includes: when the mandrel and the assist roll rotate at the third preset speed, if the difference between the current pressure value of the surface of the assist roll and the preset pressure value is greater than 5KN, increasing or decreasing the roll gap between the mandrel and the assist roll until the current pressure value of the surface of the assist roll reaches the preset pressure value, and recording the roll gap between the mandrel and the assist roll.

[0011] In some embodiments of the present application, based on the foregoing scheme, when the reference roll gap value is between -4mm and 0mm, the coiler calibration is accurate; when the reference roll gap value is between -6mm and 2mm, the coiler is used to wind thicker gauge strip steel; and when the reference roll gap value is greater than -6mm and 4mm, the method returns to step S1 to recalibrate the roll gap value.

[0012] In some embodiments of the present application, based on the foregoing scheme, when the number of times of returning to step S1 to recalibrate the roll gap value exceeds a threshold number of times, it is determined that a device failure has occurred, and the operation of returning to step S1 to recalibrate the roll gap value is stopped.

[0013] In some embodiments of the present application, based on the foregoing scheme, the preset time is 20s.

[0014] In some embodiments of the present application, based on the foregoing scheme, the roll gap setting value is a roll gap value corresponding to the minimum thickness of the strip steel produced in subsequent production.

[0015] In some embodiments of the present application, based on the foregoing scheme, the coiler is a three-roll coiler.

[0016] From the above technical solutions, the present application has at least the following advantages and positive effects:

[0017] The scheme proposed in the present application can detect the calibration effect of the coiler after calibration, determine the accuracy of the coiler calibration, and recalibrate when the coiler calibration is inaccurate, thereby reducing or avoiding accidents in subsequent production, ensuring stable production and quality of the strip steel, and improving the production efficiency of the unit. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present application, the following will briefly introduce the drawings needed in the embodiments. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0019] Figure 1 A flow chart of a detection method for coiler roll gap calibration of a coiler in an embodiment of the present application is shown;

[0020] Figure 2 A structure diagram of a coiler and a coiler shaft in an embodiment of the present application is shown.

[0021] The following is a description of the reference signs:

[0022] 101 - first roll assist; 102 - second roll assist;

[0023] 103 - third roll assist; 104 - mandrel;

[0024] 111 - first hydraulic cylinder; 112 - second hydraulic cylinder;

[0025] 113 - third hydraulic cylinder. DETAILED DESCRIPTION

[0026] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations may, however, be implemented in many different forms and should not be construed as limited to the examples set forth herein; rather, these implementations are provided so that this disclosure will be thorough and complete, and will fully convey the scope of example implementations to those skilled in the art.

[0027] Moreover, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the application. One skilled in the relevant art will recognize, however, that the

[0028] The flow diagrams depicted herein are merely examples and that other steps can be used instead of, or in addition to, those depicted. For example, one or more of the illustrated steps could be eliminated; additional steps could be added; and the order of certain steps can be changed. Some steps can be combined into a single step; and some steps can be separated into multiple steps.

[0029] It is to be understood that the terms "first", "second", and the like, used herein do not necessarily have an ordinal or chronological significance. Rather, these terms are used to distinguish different components or steps from one another. It is also to be understood that the terms "comprise", "comprising", "comprises", "include", "including", "includes", "contain", "containing", "contains", "have", "having", "has", or variants thereof are not to be construed as limiting but rather are to be construed as meaning "comprise at least the recited steps or components". It is further to be understood that the use of the singular is also to be taken as the plural and vice versa, unless the context clearly dictates otherwise.

[0030] In this application, the coiler mainly consists of a coiler mandrel, gearbox, motor, etc. The coiler mandrel is surrounded by several sector plates, which open to form the outer ring of the coiler mandrel. The coiler is used to coil strip steel into a roll shape. The auxiliary coiling roller is used to accurately deliver the head of the strip steel to the mandrel of the coiler, press the strip steel onto the mandrel with appropriate clamping force to increase the coiling tightness, apply bending processing to the strip steel to make it into a shape that is easy to coil, and press the tail end to prevent the tail of the strip steel from curling up and loosening. Through the joint operation of the coiler roll and the auxiliary coiling roller, the coiling rate and quality of the strip steel are guaranteed.

[0031] In this application, because the auxiliary winding roller operates continuously in a harsh environment of high temperature, high humidity, high pressure and high speed for a long time, the corrosion and wear of each component are relatively fast; the frequent impact of the strip head and high pressure operation will also cause the zero drift of the position measuring device; inaccurate roll gap calibration will not be detected. All of these factors increase the roll gap deviation of the auxiliary winding roller. When the deviation value accumulates to the point that it cannot meet the requirements of the product variety and specifications, product quality or production accidents will occur.

[0032] In this application, in order to ensure the quality and production stability of the strip steel when the coiler is coiling the strip steel, it is necessary to test the calibration effect of the coiler after the coiler roller is calibrated. The detection method of the coiler roller gap calibration proposed in this application can determine the accuracy of the coiler roller calibration.

[0033] The implementation details of the technical solutions in the embodiments of this application are described in detail below:

[0034] Reference Figure 1 , Figure 1 This is a flowchart of a detection method for roll gap calibration of a winding machine auxiliary roll in one embodiment of this application.

[0035] According to a typical embodiment of this application, a method is provided, the method comprising the following steps S1 to S5:

[0036] Step S1: After the roll gap value between the winding aid roller and the mandrel is calibrated, the roll gap value between the winding aid roller and the mandrel is adjusted to the roll gap setting value.

[0037] Step S2: Control the auxiliary winding roller and the mandrel to rotate at a first preset speed. If there is no collision or excessive current between the auxiliary winding roller and the mandrel, control the auxiliary winding roller and the mandrel to rotate at a second preset speed. If there is no collision or excessive current between the auxiliary winding roller and the mandrel within a preset time, control the auxiliary winding roller and the mandrel to stop rotating.

[0038] Step S3, adjust the roll gap value between the mandrel and the winding roll until the current pressure value of the winding roll surface reaches the preset pressure value.

[0039] Step S4, control the mandrel and the winding roll to rotate at a third preset speed, if the current pressure value of the winding roll surface is stable, record the roll gap value between the mandrel and the winding roll as a reference roll gap value.

[0040] Step S5, judge the accuracy of the winding roll calibration through the reference roll gap value.

[0041] In the present application, before the coiler starts production operation, in order to ensure the smooth completion of the strip production plan and the quality of the strip, it is necessary to calibrate the roll gap between the mandrel and the winding roll of the coiler first, so as to avoid the deviation of the roll gap value between the mandrel and the winding roll of the coiler, which may cause the thickness of the strip produced in the subsequent production line to be unmatched, resulting in the risk of slipping of the strip during winding or the risk of the winding roll hitting the mandrel.

[0042] In the present application, after the roll gap value between the winding roll and the mandrel is calibrated, the roll gap value between the winding roll and the mandrel is adjusted to a roll gap setting value; after the roll gap value is adjusted to the roll gap setting value, the winding roll and the mandrel are controlled to rotate at a first preset speed, if there is no collision, impact sound or current exceeding phenomenon between the winding roll and the mandrel, then the winding roll and the mandrel are controlled to rotate at a second preset speed, if there is no impact or current exceeding within a preset time, the winding roll and the mandrel are controlled to stop rotating; after the winding roll and the mandrel are controlled to stop rotating, the roll gap value between the winding roll and the mandrel is adjusted (i.e. the roll gap between the winding roll and the mandrel is slowly reduced, and at this time the roll gap value is also slowly reduced), until the current pressure value of the winding roll surface reaches the preset pressure value, the adjustment is stopped; after the current pressure value of the winding roll surface reaches the preset pressure value, the mandrel and the winding roll are controlled to rotate at a third preset speed, if the current pressure value of the winding roll surface is stable, the roll gap value between the mandrel and the winding roll is recorded as a reference roll gap value, and the accuracy of the winding roll calibration is judged through the reference roll gap value.

[0043] In an embodiment of the present application, the first preset speed is less than the second preset speed.

[0044] In the present application, when the winding-up roller and the mandrel are controlled to rotate at the first preset speed, if there is no collision, impact sound or current exceeding phenomenon between the winding-up roller and the mandrel, it indicates that the roll gap value between the winding-up roller and the mandrel is not too small and can meet the requirement that the winding-up roller will not collide with the mandrel when the strip steel with the thickness corresponding to the roll gap set value is wound up.

[0045] In the present application, it should be noted that the first preset speed is less than the second preset speed. When the winding-up roller and the mandrel are controlled to rotate at the first preset speed with the roll gap value between the winding-up roller and the mandrel being adjusted to the roll gap set value, there can be no collision, impact sound or current exceeding phenomenon. However, when the rotation speed of the winding-up roller and the mandrel is accelerated and the winding-up roller and the mandrel are controlled to rotate at the second preset speed, the vibration of the winding-up roller and the mandrel can be caused due to the accelerated rotation speed, which can result in the collision, impact sound or current exceeding phenomenon between the winding-up roller and the mandrel. Therefore, the winding-up roller and the mandrel are controlled to rotate at the second preset speed to detect whether the collision, impact sound or current exceeding phenomenon will occur between the winding-up roller and the mandrel, so as to avoid the inaccurate judgment of the winding-up roller calibration.

[0046] In an embodiment of the present application, the method further comprises: when the mandrel and the winding-up roller are controlled to rotate at the first preset speed, if the winding-up roller collides with the mandrel or the current exceeds, returning to the step S1 to recalibrate the roll gap value until the winding-up roller and the mandrel do not collide or the current does not exceed when the winding-up roller and the mandrel rotate at the first preset speed.

[0047] In the present application, when the mandrel and the winding-up roller are controlled to rotate at the first preset speed, if there is a collision, impact sound or current exceeding phenomenon between the winding-up roller and the mandrel, it indicates that the roll gap value between the winding-up roller and the mandrel is too small and the winding-up roller calibration is inaccurate. Therefore, the operation of the step 1 is returned to recalibrate the roll gap value until the winding-up roller and the mandrel do not collide, impact sound or current exceeding phenomenon when the winding-up roller and the mandrel rotate at the first preset speed, and then the operation of the above steps 1 to 5 is continued to detect.

[0048] In one embodiment of the present application, the method further comprises: when the mandrel and the build-up roller are controlled to rotate at a second preset speed, if the build-up roller and the mandrel collide or the current exceeds the standard within a preset time, returning to the step S1 to recalibrate the roll gap value until the build-up roller and the mandrel do not collide or the current does not exceed the standard within a preset time when the build-up roller and the mandrel rotate at the second preset speed.

[0049] In the present application, when the mandrel and the build-up roller are controlled to rotate at a second preset speed, if the build-up roller and the mandrel collide, make a knocking sound or the current exceeds the standard within a preset time, it indicates that the roll gap value between the build-up roller and the mandrel is too small after calibration, the calibration of the build-up roller is inaccurate, and the operation of the step 1 needs to be returned to recalibrate the roll gap value until the build-up roller and the mandrel do not collide, make a knocking sound or the current does not exceed the standard within a preset time, then the build-up roller and the mandrel are controlled to stop rotating, and the detection continues according to the operations of the steps 4 to 5.

[0050] In one embodiment of the present application, the method further comprises: when the mandrel and the build-up roller rotate at a third preset speed, if the difference between the current pressure value of the surface of the build-up roller and the preset pressure value is greater than 5 KN, increasing or decreasing the roll gap value between the mandrel and the build-up roller until the current pressure value of the surface of the build-up roller reaches the preset pressure value, and recording the roll gap value between the mandrel and the build-up roller.

[0051] In the present application, after the mandrel and the godet rotate at the first preset speed and the second preset speed, and there is no collision, impact sound or current exceeding phenomenon between the mandrel and the godet, the mandrel and the godet are controlled to stop rotating. Then the roll gap value between the godet and the mandrel is adjusted until the current pressure value of the godet surface reaches the preset pressure value, and then the mandrel and the godet are controlled to rotate at a third preset speed. If the current pressure value of the godet surface is stable (that is, when the current pressure value of the godet surface reaches the preset pressure value, the fluctuation of the current pressure value of the godet surface is small when the mandrel and the godet are controlled to rotate at the third preset speed), the roll gap value between the mandrel and the godet is recorded as a reference roll gap value. If the difference between the current pressure value of the godet surface and the preset pressure value is greater than 5KN when the mandrel and the godet rotate at the third preset speed (that is, the fluctuation of the current pressure value of the godet surface is large, which exceeds the tolerance range of the current pressure value fluctuation, and it should be noted that the current pressure value fluctuation is within ±5KN), the roll gap value between the mandrel and the godet is increased or decreased until the current pressure value of the godet surface reaches the preset pressure value, and the roll gap value between the mandrel and the godet is recorded.

[0052] In the present application, it should be noted that different godets have different preset pressure values, and the roll gap value between the godet and the mandrel is adjusted until the current pressure value of the godet surface reaches the preset pressure value. Assuming that the preset pressure value of the godet is 10KN, the roll gap value between the godet and the mandrel is adjusted until the current pressure value of the godet surface reaches 10KN, and then the mandrel and the godet are controlled to rotate at a third preset speed. The third preset speed can be 1m / s or 2m / s, and the present application does not particularly limit the speed, which can be adjusted according to the actual situation.

[0053] In the present application, when the mandrel and the winding-up roller rotate at a third preset speed, the current pressure value of the winding-up roller surface is monitored (the current pressure value of the winding-up roller surface can be collected by the winding-up roller surface pressure sensor and transmitted to the operation display interface, so that the operator can intuitively and real-timely know the current pressure value of the winding-up roller surface), and when the difference between the current pressure value of the winding-up roller surface and the preset pressure value is greater than 5 KN, the roll gap value between the mandrel and the winding-up roller is increased or decreased. It should be noted that, assuming that the preset pressure value of the winding-up roller is 10 KN (the preset pressure value can also be a range, such as 8 KN-12 KN), if the current pressure value of the winding-up roller surface is greater than the preset pressure value by 5 KN, the current pressure value of the winding-up roller surface is greater than 15 KN at this time, and if the current pressure value of the winding-up roller surface is 16 KN at this time, it indicates that the roll gap value between the winding-up roller and the mandrel is too small at this time, and the roll gap value between the mandrel and the winding-up roller needs to be increased (the greater the current pressure value of the winding-up roller surface, the smaller the roll gap value between the winding-up roller and the mandrel), until the current pressure value of the winding-up roller surface reaches the preset pressure value (10 KN or reaches the preset pressure range, such as 8 KN-12 KN), and the roll gap value between the mandrel and the winding-up roller is recorded.

[0054] In the present application, assuming that the preset pressure value of the winding-up roller is 10 KN (the preset pressure value can also be a range, such as 8 KN-12 KN), if the current pressure value of the winding-up roller surface is less than the preset pressure value by 5 KN, the current pressure value of the winding-up roller surface is less than 5 KN at this time, and if the current pressure value of the winding-up roller surface is 4 KN at this time, it indicates that the roll gap value between the winding-up roller and the mandrel is too large at this time, and the roll gap value between the mandrel and the winding-up roller needs to be decreased (the smaller the current pressure value of the winding-up roller surface, the larger the roll gap value between the winding-up roller and the mandrel), until the current pressure value of the winding-up roller surface reaches the preset pressure value (10 KN or reaches the preset pressure range, such as 8 KN-12 KN), and the roll gap value between the mandrel and the winding-up roller is recorded.

[0055] In an embodiment of the present application, the accuracy of the winding-up roller calibration is determined by the reference roll gap value, including: when the reference roll gap value is-4 mm-0 mm, the winding-up roller calibration is accurate; when the reference roll gap value is-6 mm-2 mm, the winding-up roller is used to wind thicker specifications of strip steel; and when the reference roll gap value is-6 mm-4 mm or more, the step S1 is returned to, so as to re-calibrate the roll gap value.

[0056] In the present application, the roll gap value between the mandrel and the lap roll is recorded, the roll gap value is taken as a reference roll gap value, and the reference roll gap value is analyzed and judged. When the reference roll gap value is-4mm-0mm, it is determined that the lap roll calibration is accurate at this time, and the calibrated roll gap value can be applied to the coiling of any thickness of strip steel in the subsequent production plan; when the reference roll gap value is-6mm-2mm, it is suitable for coiling thick gauge strip steel, such as coiling strip steel with a thickness of 3.0mm or more; when the reference roll gap value is-6mm-4mm or more, it is determined that the lap roll calibration is inaccurate at this time, and cannot be applied to the coiling of strip steel in the subsequent production plan, and needs to return to the step S1 to recalibrate the roll gap value to ensure the accuracy of the lap roll calibration.

[0057] In the present application, it should be noted that since the mandrel of the coiler is a cylindrical shape surrounded by four long sector plates, there is an axial telescopic diagonal stepped pull rod at the core position to realize the control change function of the outer diameter size of the mandrel. The sector plate and the pull rod have a slight gap, which is balanced by a strong spring, so the roll gap value between the mandrel and the lap roll can also be negative. When the lap roll is pressed on the mandrel with a certain force, the sector plate can move towards the center, and the moving distance is proportional to the manufacturing gap plus the wear amount. When this distance reaches a certain value, the mandrel needs to be replaced for repair or scrap.

[0058] In the present application, in actual production, the roll gap value is generally-3mm-0mm, which can meet the normal production of the production line. Assuming that the reference roll gap value is-6mm, there may be a slip risk when coiling strip steel with a thickness of 4mm or less. Assuming that the reference roll gap value is 1mm, the lap roll may seriously hit the mandrel when coiling strip steel with a thickness of 2.5mm or less. It can be seen that the accuracy of the lap roll calibration is very important for the production of strip steel.

[0059] In an embodiment of the present application, when the number of times of returning to the step S1 to recalibrate the roll gap value exceeds a threshold number of times (the threshold number of times can be 3 times, or other number of times, which is not particularly limited in the present application), it is determined that the equipment has a fault, and the operation of returning to the step S1 to recalibrate the roll gap value is stopped, and a professional maintenance personnel needs to be found to repair the equipment.

[0060] In an embodiment of the present application, the preset time can be 20s.

[0061] In an embodiment of the present application, the roll gap setting value is the roll gap value corresponding to the minimum thickness of strip steel in the subsequent production of the production line.

[0062] In an embodiment of the present application, the lap roll of the coiler can be a three-roll lap roll.

[0063] In the present application, it should be noted that the roll assisting roll can also be a two-roll assisting roll, a four-roll assisting roll, or other roll type assisting roll, which is not particularly limited in the present application and can be adjusted according to the actual needs of the production line.

[0064] The specific embodiments of the present application will be further illustrated below through specific examples, but the specific embodiments of the present application are not limited to the following examples.

[0065] Referring to Figure 2 , Figure 2 The roll assisting roll and the coiling machine mandrel structure diagram in one embodiment of the present application are shown.

[0066] In one specific embodiment of the present application, taking the three-roll assisting roll shown in Figure 2 as an example, the specific detection steps of the roll gap calibration accuracy of each roll assisting roll of the coiling machine are shown in steps 111 to 116.

[0067] Step 111, the roll gap between the first roll assisting roll 101, the second roll assisting roll 102, the third roll assisting roll 103 and the mandrel 104 of the coiling machine shown in Figure 2 is closed to the roll gap value corresponding to the thinnest thickness of the strip produced by the production line.

[0068] Step 112, rotate the first roll assisting roll 101, the second roll assisting roll 102, the third roll assisting roll 103, the mandrel 104 at a speed of 3m / s, if there is a collision, impact sound or current exceeding phenomenon between the first roll assisting roll 101, the second roll assisting roll 102, the third roll assisting roll 103 and the mandrel 104, return to the step S111 to recalibrate the roll gap value until the first roll assisting roll 101, the second roll assisting roll 102, the third roll assisting roll 103 and the mandrel 104 do not exist collision, impact sound or current exceeding phenomenon when the roll assisting roll and the mandrel 104 rotate at the first preset speed, then the next step can be performed.

[0069] Step 113, rotating the first roll 101, the second roll 102, the third roll 103, the mandrel 104 at a speed of 12 m / s, if the first roll 101, the second roll 102, the third roll 103 and the mandrel 104 exist the phenomenon of collision, impact sound or current exceeding standard within 20s, return to the step S111 to recalibrate the roll gap value, until the first roll 101, the second roll 102, the third roll 103 and the mandrel 104 do not exist the phenomenon of collision, impact sound or current exceeding standard when the roll and the mandrel 104 rotate at the first preset speed, then control the first roll 101, the second roll 102, the third roll 103 and the mandrel 104 to stop rotating.

[0070] Step 114, adjusting the roll gap value between the first roll 101 and the mandrel 104 until the current pressure value of the surface of the first roll 101 reaches the preset pressure value (5KN-10KN) of the first roll 101 to stop adjusting; adjusting the roll gap value between the second roll 102 and the mandrel 104 until the current pressure value of the surface of the second roll 102 reaches the preset pressure value (10KN-15KN) of the second roll 102 to stop adjusting; adjusting the roll gap value between the third roll 103 and the mandrel 104 until the current pressure value of the surface of the third roll 103 reaches the preset pressure value (8KN-12KN) of the third roll 103 to stop adjusting.

[0071] Step 115, controlling the mandrel 104 and the first roll 101, the second roll 102, the third roll 103 to rotate at a third preset speed, if the current pressure value of the surface of the first roll 101, the second roll 102, the third roll 103 is stable, recording the roll gap value between the mandrel 104 and the roll as a reference roll gap value; if the difference between the current pressure value of the surface of the first roll 101, the second roll 102, the third roll 103 and the preset pressure value is greater than 5KN, then increasing or decreasing the roll gap value between the mandrel 104 and the roll until the current pressure value of the surface of the first roll 101, the second roll 102, the third roll 103 reaches the preset pressure value or within the range of the preset pressure value to stop, and recording the roll gap value between the mandrel 104 and the roll as a reference roll gap value.

[0072] Step 116, judging the accuracy of the calibration of the coiler roll by the reference roll gap value, when the reference roll gap value is between -4mm and 0mm, the calibration of the coiler roll is accurate; when the reference roll gap value is between -6mm and 2mm, it is used for coiling thicker gauge strip steel; when the reference roll gap value is between -6mm and 4mm or above, it returns to the step S1 to re-calibrate the roll gap value.

[0073] In this application, it is noted here that when the number of times of returning to the step S1 to re-calibrate the roll gap value exceeds 3 times, it is determined that the equipment has a fault, and the operation of returning to the step S1 to re-calibrate the roll gap value is stopped, and a professional maintenance needs to be performed by a device maintenance personnel; it is also noted that the first coiler roll 101, the second coiler roll 102, and the third coiler roll 103 can be controlled by the first hydraulic cylinder 111, the second hydraulic cylinder 112, and the third hydraulic cylinder 113 (manual control can also be adopted when necessary) during calibration or adjustment, wherein the first hydraulic cylinder 111 controls the size of the roll gap value between the first coiler roll 101 and the mandrel 104; the second hydraulic cylinder 112 controls the size of the roll gap value between the second coiler roll 102 and the mandrel 104; and the third hydraulic cylinder 113 controls the size of the roll gap value between the third coiler roll 103 and the mandrel 104. Figure 2

[0074] From the above technical solution, the present application has at least the following advantages and positive effects:

[0075] Firstly, the scheme proposed in the present application can detect the calibration effect of the coiler roll after the calibration of the coiler roll, judge the accuracy of the calibration of the coiler roll, and re-calibrate when the calibration of the coiler roll is inaccurate, so as to reduce or avoid accidents in subsequent production, ensure stable production and quality of subsequent strip steel, and improve the production efficiency of the unit.

[0076] Secondly, the scheme proposed in the present application can ensure high-quality production of strip steel, improve the quality and production efficiency of strip steel, increase market competitiveness and capital income.

[0077] Thirdly, the scheme proposed in the present application can greatly reduce the scrap amount of strip steel and the damage amount of equipment, greatly saving resources and equipment maintenance funds.

[0078] ​While the application has been described with reference to several exemplary embodiments, it will be understood that the terms used are intended to be illustrative and not limiting. It will be appreciated that variations and modifications of the application can be effected without departing from the spirit or scope of the application. It will be appreciated that the above described embodiments are only illustrative of the application and not limiting. It will be understood that the above description is intended to be illustrative and not limiting. It will be appreciated that the above description is intended to be illustrative and not limiting. It will be understood that the above description is intended to be illustrative and not limiting. It will be understood that the above description is intended to be illustrative and not limiting. It will be understood that the above description is intended to be illustrative and not limiting. It will be understood that the above description is intended to be illustrative and not limiting. It will be understood that the above description is intended to be illustrative and not limiting. It will be understood that the above description is intended to be illustrative and not limiting. It will be understood that the above description is intended to be illustrative and not limiting. It will be understood that the

Claims

1. A method for detecting roll gap calibration of a coiler lap roller, characterized in that, The coiler comprises a mandrel and at least one lap roller, and the method comprises: S1, after the roll gap value between the lap roller and the mandrel is calibrated, the roll gap value between the lap roller and the mandrel is adjusted to a roll gap setting value; S2, the lap roller and the mandrel are controlled to rotate at a first preset speed, if there is no impact or current exceeding the standard between the lap roller and the mandrel, the lap roller and the mandrel are controlled to rotate at a second preset speed, if there is no impact or current exceeding the standard between the lap roller and the mandrel within a preset time, the lap roller and the mandrel are controlled to stop rotating; S3, the roll gap value between the lap roller and the mandrel is adjusted until the current pressure value of the lap roller surface reaches the preset pressure value, and the adjustment is stopped; S4, the mandrel and the lap roller are controlled to rotate at a third preset speed, if the current pressure value of the lap roller surface is stable, the roll gap value between the mandrel and the lap roller is recorded as a reference roll gap value; S5, the accuracy of the lap roller calibration is judged by the reference roll gap value.

2. The method of claim 1, wherein, The first preset speed is less than the second preset speed.

3. The method of claim 2, wherein, The method further comprises: When the mandrel and the lap roller are controlled to rotate at the first preset speed, if there is impact or current exceeding the standard between the lap roller and the mandrel, return to the step S1 to recalibrate the roll gap value until there is no impact or current exceeding the standard between the lap roller and the mandrel when the lap roller and the mandrel rotate at the first preset speed.

4. The method of claim 3, wherein, The method further comprises: When the mandrel and the lap roller are controlled to rotate at the second preset speed, if there is impact or current exceeding the standard between the lap roller and the mandrel within a preset time, return to the step S1 to recalibrate the roll gap value until there is no impact or current exceeding the standard between the lap roller and the mandrel within a preset time when the lap roller and the mandrel rotate at the second preset speed.

5. The method of claim 4, wherein, The method further comprises: When the mandrel and the lap roller rotate at the third preset speed, if the difference between the current pressure value of the lap roller surface and the preset pressure value is greater than 5KN, increase or decrease the roll gap value between the mandrel and the lap roller until the current pressure value of the lap roller surface reaches the preset pressure value, and stop and record the roll gap value between the mandrel and the lap roller.

6. The method of claim 5, wherein, The accuracy of the lap roller calibration by the reference roll gap value comprises: When the reference roll gap value is-4mm-0mm, the lap roller calibration is accurate; When the reference roll gap value is-6mm-2mm, it is used for coiling thicker gauge strip steel; When the reference roll gap value is-6mm-4mm or more, return to the step S1 to recalibrate the roll gap value.

7. The method of claim 6, wherein, When the number of times of returning to the step S1 to recalibrate the roll gap value exceeds a threshold value, it is determined that the equipment is malfunctioning, and the operation of returning to the step S1 to recalibrate the roll gap value is stopped.

8. The method of claim 1, wherein, The preset time is 20s.

9. The method of claim 1, wherein, The roll gap setting value is the roll gap value corresponding to the minimum thickness of the strip steel in subsequent production.

10. The method of claim 1, wherein, The lap roller of the coiler is a three-roller lap roller.

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