Method for precision adjustment of a rotary coiler

Abstract

The application discloses a precision adjusting method of a rotary coiler, which comprises the following steps: arranging a target point unit at at least three calibration positions of a winding drum; measuring the coordinates of the target ball by using a laser tracker, then rotating the winding drum at least twice, and measuring the coordinates of the target ball; obtaining the center coordinates of the calibration positions; obtaining the coaxiality of the winding drum based on the center coordinates; after the coaxiality adjustment is completed, rotating the rotary device, and re-determining the center coordinates of the calibration positions; determining the rotary surface of the rotary device based on the center coordinates of the calibration positions determined for multiple times, obtaining the perpendicularity of the winding drum, assembling and adjusting, and stopping until the perpendicularity of the winding drum is less than a second threshold value. The application is helpful to improve the precision adjusting efficiency of the rotary coiler, and improve the assembling efficiency, production efficiency and assembling precision of the coiler.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rotary coiler, in particular to a precision adjustment method of rotary coiler. BACKGROUND

[0002] Coiler is a professional equipment for coiling steel plate in metallurgical industry, which is divided into single drum coiler and double drum rotary coiler according to the number of coiling drums. Among them, double drum rotary coiler is compact in design, saves equipment installation space and fixed investment; when coiling strip steel, it can quickly establish tension to coil strip steel in a continuous manner, prolongs stable rolling time, improves yield and is widely used in various strip steel production lines.

[0003] Double drum rotary coiler belongs to large high-speed rotary machine, which is complex in structure, long in transmission shaft and high in transmission level, and is a metallurgical machinery with high design and manufacturing difficulty and high assembly precision requirement. During assembly, not only the center of the coiling drum needs to be aligned with the rotary surface of the large drum, but also the rotary center of the large drum needs to be aligned with the rotary center of the primary reducer. Finally, when the two coiling drums, the large drum, the primary reducer and the secondary reducer are assembled, the assembly precision of each component also needs to be repeatedly adjusted. In the prior art, multiple measurements and adjustments need to be made with the help of level meter, steel wire and other equipment, which consumes a lot of energy and time and is not conducive to improving the assembly efficiency and production efficiency of the coiler. SUMMARY

[0004] The present application aims to provide a precision adjustment method of rotary coiler to solve the technical problem in the prior art that the assembly precision adjustment process of double drum rotary coiler is complex, consumes a lot of energy and time, and is not conducive to improving the assembly efficiency and production efficiency of the coiler.

[0005] In order to solve the above technical problem, the present application provides a precision adjustment method of rotary coiler, which comprises a rotary device and a plurality of coiling drums, and the precision adjustment method comprises:

[0006] Target point units are arranged at at least three calibration positions of the coiling drums, each target point unit comprising at least one target ball arranged on the outer peripheral surface of the coiling drum and spaced apart in the circumferential direction, and the at least three calibration positions are sequentially and spaced apart along the length direction of the coiling drum;

[0007] The coordinates of the target balls are measured by using a laser tracker, then the coiling drum is rotated at least twice, and the coordinates of the target balls are measured after each rotation is completed;

[0008] Based on the coordinates of the target balls measured multiple times, the coordinates of the center of the calibration position are obtained;

[0009] obtaining coaxiality of the winding drum based on the center coordinates of the at least three calibration positions of the winding drum, and performing assembly adjustment until the coaxiality of the winding drum is less than a first threshold value;

[0010] After the coaxiality adjustment of the plurality of winding drums is completed, the coordinates of the target ball are measured by using a laser tracker, the center coordinates of the calibration positions are re-determined, the rotating device is controlled to rotate at least twice, and the center coordinates of the calibration positions are re-determined after each rotation is completed;

[0011] Based on the center coordinates of the calibration positions determined multiple times, a rotating surface of the rotating device is determined, the perpendicularity of the winding drum is obtained, and assembly adjustment is performed until the perpendicularity of the winding drum is less than a second threshold value.

[0012] In one or more embodiments, the step of obtaining the coaxiality of the winding drum based on the center coordinates of the at least three calibration positions of the winding drum comprises:

[0013] Based on the center coordinates of the at least three calibration positions of the winding drum, a first central column is obtained, the first central column being a cylindrical body with the smallest diameter that covers the centers of all the calibration positions;

[0014] Based on the diameter of the first central column and the distance between adjacent calibration positions, the coaxiality of the winding drum is obtained.

[0015] In one or more embodiments, the step of determining the rotating surface of the rotating device based on the center coordinates of the calibration positions determined multiple times, and obtaining the perpendicularity of the winding drum comprises:

[0016] A plane passing through the centers of the calibration positions determined multiple times is constructed as the rotating surface of the rotating device;

[0017] Based on the center coordinates of the at least three calibration positions of the winding drum, a first central column of the winding drum is obtained, the first central column being a cylindrical body with the smallest diameter that covers the centers of all the calibration positions;

[0018] The central axis of the first central column of the winding drum is taken as the center line of the winding drum, the included angle between the center line and the rotating surface of the rotating device is calculated, and the perpendicularity of the winding drum is obtained.

[0019] In one or more embodiments, further comprising:

[0020] After the perpendicularity adjustment of the plurality of winding drums is completed, the center coordinates of the calibration positions of the winding drum are re-determined, and then the rotating device is controlled to rotate at least twice, and the center coordinates of the calibration positions of the winding drum are re-determined after each rotation is completed;

[0021] Based on the center coordinates of the calibration positions determined multiple times, the coaxiality of the rotary device is obtained, and assembly adjustment is performed until the coaxiality of the rotary device is less than a third threshold value.

[0022] After the coaxiality adjustment of the rotary device is completed, the symmetry of the multiple winding drums is calculated, and assembly adjustment is performed until the symmetry of the multiple winding drums is less than a fourth threshold value.

[0023] In one or more embodiments, the step of obtaining the coaxiality of the rotary device based on the center coordinates of the calibration positions determined multiple times comprises:

[0024] Based on the center coordinates of the calibration positions determined multiple times, the rotary center corresponding to the calibration position is obtained.

[0025] Based on the rotary centers corresponding to the multiple calibration positions, the coaxiality of the rotary device is obtained.

[0026] In one or more embodiments, the step of obtaining the coaxiality of the rotary device based on the rotary centers corresponding to the multiple calibration positions comprises:

[0027] Based on the rotary centers corresponding to the multiple calibration positions, a second center column is obtained, which is the smallest cylindrical column that wraps all the rotary centers corresponding to the calibration positions.

[0028] Based on the diameter of the second center column and the distance between adjacent calibration positions, the coaxiality of the rotary device is obtained.

[0029] In one or more embodiments, after the coaxiality adjustment of the rotary device is completed, the step of calculating the symmetry of the multiple winding drums comprises:

[0030] After the coaxiality adjustment of the rotary device is completed, the second center column is re-determined, the center axis of the second center column is taken as the center line of the rotary device, the distance between the multiple winding drums and the center line is calculated, and the symmetry of the multiple winding drums is obtained.

[0031] In one or more embodiments, the target point unit further comprises a ring-shaped tool, the ring-shaped tool is sleeved and mounted on the winding drum, and a plurality of uniformly spaced positioning holes are arranged on the outer ring surface of the ring-shaped tool, the positioning holes match the shape of the target ball, and the target ball is at least partially embedded in the positioning hole for installation.

[0032] In one or more embodiments, the target ball and the ring-shaped tool are magnetically fixed.

[0033] In one or more embodiments, the step of arranging the target point units at at least three calibration positions of the winding drum specifically comprises arranging one target point unit at the outer side, the middle and the inner side of the winding drum respectively.

[0034] Compared with the prior art, the application has the following beneficial effects:

[0035] The application arranges target balls at different positions of the outer circumferential surface of the winding drum, measures the coordinates of the target balls by using a laser tracker, obtains a plurality of target ball coordinates by controlling the rotation of the winding drum and the rotation of the rotating device, and realizes the measurement of the coaxiality, perpendicularity, symmetry of the winding drum and the coaxiality of the rotating device based on the plurality of target ball coordinates, which helps to improve the precision adjustment efficiency of the rotary winding machine and improve the assembly efficiency, production efficiency and assembly precision of the winding machine. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the specific embodiments of the application or the technical solutions in the prior art, the drawings needed in the specific embodiments or the prior art description will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0037] Figure 1 is a structural schematic diagram of an embodiment of the double-winding drum rotary winding machine of the application;

[0038] Figure 2 is a flowchart of an embodiment of the precision adjustment method of the rotary winding machine of the application;

[0039] Figure 3 is Figure 2 is a flowchart of an embodiment corresponding to S400 in the method;

[0040] Figure 4 is a schematic diagram of an embodiment of the first center column of the application;

[0041] Figure 5 is Figure 2 is a flowchart of an embodiment corresponding to S600 in the method;

[0042] Figure 6 is a schematic diagram of an embodiment of the rotating plane of the application;

[0043] Figure 7 is Figure 2 is a flowchart of an embodiment corresponding to S800 in the method. DETAILED DESCRIPTION

[0044] The embodiments of the technical solutions of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, but cannot limit the protection scope of the present application.

[0045] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the present application should be understood as the usual meanings understood by the skilled person in the field to which the present application belongs.

[0046] Please refer to Figure 1 , Figure 1 is a structural schematic diagram of an embodiment of the double-drum rotary coiler of the present application.

[0047] As shown in Figure 1 , the double-drum rotary coiler includes a slewing device and two drums arranged on the slewing device. During assembly, not only the centers of the drums need to be aligned with the slewing surface of the slewing device, but also the slewing center of the slewing device (also the slewing center of the secondary speed reducer) needs to be aligned with the slewing center of the primary speed reducer. Finally, when the two drums, the slewing device, the primary speed reducer and the secondary speed reducer are assembled, the assembly accuracy of each component also needs to be repeatedly adjusted.

[0048] At present, during the assembly process of the double-drum rotary coiler, multiple measurements and adjustments need to be made with the help of a level, a steel wire and other equipment during the precision adjustment process, which consumes a lot of effort and time and is not conducive to improving the assembly efficiency and production efficiency of the coiler.

[0049] In order to solve the above problems, the applicant has developed a new precision adjustment method for a rotary coiler. This method measures the coordinates of the target points on the drums based on a laser tracker, and calculates the center axis, perpendicularity and slewing center of each drum based on the measured data, which helps to quickly adjust the precision of the rotary coiler to meet the preset conditions, and significantly improves the assembly efficiency and production efficiency of the coiler.

[0050] Specifically, please refer to Figure 2 , Figure 2 is a flowchart of an embodiment of the precision adjustment method for the rotary coiler of the present application.

[0051] As shown in Figure 2 , the method comprises:

[0052] S100, arranging target point units at at least three calibration positions of the drum.

[0053] Each target point unit includes at least one target ball arranged on the outer peripheral surface of the drum and spaced apart in the circumferential direction, and the at least three calibration positions are sequentially and spaced apart in the length direction of the drum.

[0054] Specifically, in one embodiment, one target point unit can be arranged on the outer side, the middle and the inner side of the winding drum respectively, and three calibration positions are arranged on the winding drum.

[0055] In one embodiment, each target point unit can include only one target ball, and in other embodiments, each target point unit can also include a plurality of target balls arranged at intervals in the circumferential direction, for example, four target balls spaced at 90° intervals, which can all achieve the effect of the embodiment.

[0056] In one embodiment, the target point unit can include a ring-shaped tool, which can be sleeved and mounted on the winding drum, for example, the ring-shaped tool can be fixed on the winding drum by bolts.

[0057] The outer ring surface of the ring-shaped tool is provided with a plurality of uniformly spaced positioning holes, which are matched with the shape of the target ball, and the target ball is at least partially embedded in the positioning hole.

[0058] In one embodiment, the target ball can be magnetically fixed in the positioning hole, and in other embodiments, the target ball can also be fixed in other ways, which can all achieve the effect of the embodiment.

[0059] S200, the coordinates of the target ball are measured by using a laser tracker, then the winding drum is rotated at least twice, and the coordinates of the target ball are measured after each rotation.

[0060] Specifically, the coordinates of the target ball can be measured once in the initial state, then the winding drum is rotated at least twice, for example, each time by 90°, and the coordinates of the target ball are measured again after rotation.

[0061] Based on the above operation, at least three coordinates of the target ball of each calibration position can be obtained, and the three coordinates are arranged around the center of the winding drum at the calibration position.

[0062] S300, based on the coordinates of the target ball measured multiple times, the center coordinates of the calibration position are obtained.

[0063] It can be understood that three points can determine a circle, and the center coordinates of the circle can be obtained; based on the coordinates of the target ball measured multiple times, the center coordinates of the calibration position can be obtained.

[0064] S400, based on the center coordinates of the winding drum at the at least three calibration positions, the coaxiality of the winding drum is obtained, and assembly adjustment is performed until the coaxiality of the winding drum is less than a first threshold value.

[0065] Since the center coordinates of the winding drum at the at least three spaced calibration positions are known, the coaxiality of the winding drum can be obtained, and specifically, please refer to Figure 3 , Figure 3 is Figure 2 the flowchart of one embodiment corresponding to S400 in.

[0066] As shown in Figure 3 , the method for obtaining the coaxiality of the winding drum comprises:

[0067] S401, based on the center coordinates of the at least three calibration positions of the winding drum, a first center column is obtained.

[0068] The first center column is a cylindrical body with the smallest diameter that covers all the centers of the calibration positions.

[0069] Please refer to Figure 4 , Figure 4 , which is a schematic diagram of an embodiment of the first center column of the present application.

[0070] As shown in Figure 4 , based on the center coordinates of the three calibration positions, a first center column that covers all the centers can be constructed, which is the actual center line of the winding drum in the figure.

[0071] Based on the actual center line and the theoretical center line of the winding drum, the coaxiality of the winding drum can be obtained.

[0072] S402, based on the diameter of the first center column and the distance between adjacent calibration positions, the coaxiality of the winding drum is obtained.

[0073] Based on the diameter φd of the first center column and the distance L between adjacent calibration positions, the coaxiality φd / L of the winding drum can be obtained.

[0074] Based on the measured coaxiality of the winding drum, the assembly of the winding drum can be adjusted so that the coaxiality of the winding drum is less than a first threshold value.

[0075] The first threshold value is obtained based on the actual working condition, and in an exemplary embodiment, the first threshold value can be 0.05mm / m.

[0076] S500, after the coaxiality adjustment of the plurality of winding drums is completed, the coordinates of the target ball are measured using a laser tracker, the center coordinates of the calibration positions are re-determined, the rotating device is controlled to rotate at least twice, and after each rotation is completed, the center coordinates of the calibration positions are re-determined.

[0077] After the coaxiality adjustment of the plurality of winding drums is completed, the winding drum is controlled to rotate multiple times, and after each rotation is completed, the coordinates of the target ball are measured and the center coordinates of the calibration positions are re-determined.

[0078] Then control the rotating device to rotate, and after each rotation is completed, repeat the above steps to re-determine the center coordinates of the calibration positions.

[0079] S600, based on the center coordinates of the calibration positions determined multiple times, determine the rotation surface of the rotating device, obtain the perpendicularity of the winding drum, and assemble and adjust until the perpendicularity of the winding drum is less than the second threshold value.

[0080] Specifically, please refer to Figure 5 , Figure 5 is Figure 2 the flowchart of an embodiment corresponding to S600 in

[0081] As shown in Figure 5 , the method for obtaining the perpendicularity of the winding drum comprises:

[0082] S601, construct a plane passing through the centers of the calibration positions determined multiple times as the rotation surface of the rotating device.

[0083] Since the center coordinates of the calibration positions are known when the rotating device rotates to different angles, a plane passing through the centers of the calibration positions at all angles can be constructed, which is the rotation surface of the rotating device.

[0084] Please refer to Figure 6 , Figure 6 is a schematic diagram of an embodiment of the rotating plane of the present application.

[0085] As shown in Figure 6 , the rotating plane passes through the centers of the calibration positions at different angles.

[0086] S602, based on the center coordinates of the calibration positions of the winding drum, obtain the first center column of the winding drum.

[0087] The same as S401, the first center column of the winding drum is determined again at this time.

[0088] S603, take the center axis of the first center column of the winding drum as the center line of the winding drum, calculate the included angle between the center line and the rotation surface of the rotating device, and obtain the perpendicularity of the winding drum.

[0089] The center axis of the first center column is the center line of the winding drum, and the included angle between the center line of the winding drum and the rotation surface can be calculated to obtain the perpendicularity of the winding drum.

[0090] Based on the calculated perpendicularity, assembly adjustment can be guided until the perpendicularity is less than the second threshold value.

[0091] The second threshold value is a data preset based on the actual working condition, which can be adjusted based on the working condition.

[0092] Based on the above steps, the coaxiality and perpendicularity of the winding drum can be quickly adjusted, and the assembly precision of the winding drum is effectively improved.

[0093] In order to realize the adjustment of the coaxiality of the rotating device and the symmetry of the multiple winding drums, please refer toFigure 1 The method of the present application further comprises:

[0094] S700, after the verticality adjustment of the plurality of reels is completed, the center coordinates of the calibration position of the reels are re-determined, then the rotating device is controlled to rotate at least twice, and after each rotation is completed, the center coordinates of the calibration position of the reels are re-determined.

[0095] The center coordinates of the calibration position at different rotation angles of the rotating device are re-determined, which is the same as S500. In an embodiment, the initial state of the rotating device can be taken as 0°, and then the rotating device is rotated by 90° and 180° respectively to obtain the center coordinates of the calibration position at 0°, 90° and 180°.

[0096] S800, based on the center coordinates of the calibration position determined multiple times, the coaxiality of the rotating device is obtained, and assembly adjustment is performed until the coaxiality of the rotating device is less than a third threshold value.

[0097] Please refer to Figure 7 , Figure 7 is Figure 2 the flowchart of an embodiment corresponding to S800 in

[0098] As shown in Figure 7 , the method for obtaining the coaxiality of the rotating device comprises:

[0099] S801, based on the center coordinates of the calibration position determined multiple times, the rotating center corresponding to the calibration position is obtained.

[0100] Since the center coordinates of the calibration position at different rotation angles of the rotating device are known, a circle passing through the centers of the calibration position at all angles can be constructed, and the circle is taken as the rotating center corresponding to the calibration position.

[0101] S802, based on the rotating centers corresponding to the plurality of calibration positions, the coaxiality of the rotating device is obtained.

[0102] Since the rotating centers of the plurality of calibration positions are known, a cylindrical body with the smallest diameter that can wrap all the rotating centers of the calibration positions, i.e. a second center column, can be constructed, which is the actual center axis of the rotating device.

[0103] Based on the diameter φD of the second center column and the distance L between adjacent calibration positions, the coaxiality φD / L of the rotating device can be obtained.

[0104] Based on the measured coaxiality of the rotating device, the assembly of the rotating device can be adjusted so that the coaxiality of the rotating device is less than a third threshold value.

[0105] The third threshold value is obtained based on the actual working condition and can be adjusted based on the working condition.

[0106] S900, after the coaxiality adjustment of the slewing device is completed, the symmetry of the plurality of winding drums is calculated, and assembly adjustment is performed until the symmetry of the plurality of winding drums is less than a fourth threshold value.

[0107] After the coaxiality adjustment of the slewing device is completed, the second center column can be re-determined, and the center line of the second center column is taken as the center axis of the slewing device.

[0108] Then, the distance from the center axis of each winding drum to the center axis of the slewing device is calculated, and the symmetry of the plurality of winding drums is obtained.

[0109] Based on the measured symmetry, assembly adjustment is performed until the symmetry is less than the fourth threshold value.

[0110] The fourth threshold value is preset based on the actual working condition and can be adjusted based on the working condition.

[0111] Based on the above steps, the coaxiality of the slewing device and the symmetry of the winding drums can be quickly adjusted, and the assembly precision of the winding drums and the slewing device is effectively improved.

[0112] In the description of the present application, a large number of specific details are described. However, it can be understood that the embodiments of the present application can be practiced without these specific details. In some examples, well-known methods, structures and techniques are not shown in detail in order not to obscure the understanding of the present description.

[0113] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present description, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the skilled person in the art can combine and combine the different embodiments or examples described in the present description and the features of the different embodiments or examples without contradiction.

[0114] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and description of the present application.

Claims

1. A method of precision adjustment of a rotary coiler, characterized in that, The rotary coiling machine comprises a slewing device and a plurality of coiling drums, and the precision adjustment method comprises: target point units are arranged at at least three calibration positions of the coiling drums, each of the target point units comprising at least one target ball arranged on the outer circumferential surface of the coiling drum in a circumferential interval, and the at least three calibration positions are arranged in a length direction of the coiling drum in sequence; coordinates of the target balls are measured by using a laser tracker, then the coiling drum is rotated at least twice, and the coordinates of the target balls are measured after each rotation is completed; center coordinates of the calibration positions are obtained based on the coordinates of the target balls measured multiple times; coaxialities of the coiling drums are obtained based on the center coordinates of the calibration positions of the at least three calibration positions of the coiling drums, assembly adjustment is performed until the coaxialities of the coiling drums are less than a first threshold value; after the coaxialities of the plurality of coiling drums are adjusted, the coordinates of the target balls are measured by using the laser tracker, the center coordinates of the calibration positions of the coiling drums are re-determined, the slewing device is controlled to rotate at least twice, and the center coordinates of the calibration positions of the coiling drums are re-determined after each rotation is completed; a rotation surface of the slewing device is determined based on the center coordinates of the calibration positions determined multiple times, perpendicularities of the coiling drums are obtained, assembly adjustment is performed until the perpendicularities of the coiling drums are less than a second threshold value.

2. The precision adjustment method of claim 1, wherein, The step of obtaining the coaxialities of the coiling drums based on the center coordinates of the calibration positions of the at least three calibration positions of the coiling drums comprises: a first central column is obtained based on the center coordinates of the calibration positions of the at least three calibration positions of the coiling drums, the first central column being a cylindrical body with the smallest diameter that covers the centers of all the calibration positions; the coaxialities of the coiling drums are obtained based on the diameter of the first central column and the interval between adjacent calibration positions.

3. The precision adjustment method of claim 1, wherein, The step of determining the rotation surface of the slewing device based on the center coordinates of the calibration positions determined multiple times comprises: a plane passing through the centers of the calibration positions determined multiple times is constructed as the rotation surface of the slewing device; a first central column of the coiling drum is obtained based on the center coordinates of the calibration positions of the at least three calibration positions of the coiling drums, the first central column being a cylindrical body with the smallest diameter that covers the centers of all the calibration positions; an angle between a center line of the coiling drum and the rotation surface of the slewing device is calculated by taking a center axis of the first central column of the coiling drum as the center line of the coiling drum, and the perpendicularities of the coiling drums are obtained.

4. The precision adjustment method of claim 1, wherein, Further comprising: after the perpendicularities of the plurality of coiling drums are adjusted, the center coordinates of the calibration positions of the coiling drums are re-determined, then the slewing device is controlled to rotate at least twice, and the center coordinates of the calibration positions of the coiling drums are re-determined after each rotation is completed; the coaxialities of the slewing device are obtained based on the center coordinates of the calibration positions determined multiple times, assembly adjustment is performed until the coaxialities of the slewing device are less than a third threshold value; after the coaxialities of the slewing device are adjusted, symmetries of the plurality of coiling drums are calculated, assembly adjustment is performed until the symmetries of the plurality of coiling drums are less than a fourth threshold value.

5. The precision adjustment method of claim 4, wherein, The step of obtaining the coaxialities of the slewing device based on the center coordinates of the calibration positions determined multiple times comprises: Based on the center coordinates of the plurality of calibration positions, a center of rotation corresponding to the calibration position is obtained; Based on the centers of rotation corresponding to the plurality of calibration positions, the coaxiality of the rotating device is obtained.

6. The precision adjustment method of claim 5, wherein, The step of obtaining the coaxiality of the rotating device based on the centers of rotation corresponding to the plurality of calibration positions comprises: Based on the centers of rotation corresponding to the plurality of calibration positions, a second center column is obtained, which is the smallest cylindrical body that can wrap all the centers of rotation corresponding to the calibration positions; Based on the diameter of the second center column and the distance between adjacent calibration positions, the coaxiality of the rotating device is obtained.

7. The precision adjustment method of claim 6, wherein, After the coaxiality of the rotating device is adjusted, the step of calculating the symmetry of the plurality of winding drums comprises: After the coaxiality of the rotating device is adjusted, the second center column is re-determined, the center axis of the second center column is taken as the center line of the rotating device, the distance between the plurality of winding drums and the center line is calculated, and the symmetry of the plurality of winding drums is obtained.

8. The precision adjustment method of claim 1, wherein, The target point unit further comprises a ring-shaped tool, which is sleeved and mounted on the winding drum, and a plurality of uniformly spaced positioning holes are arranged on the outer ring surface of the ring-shaped tool, the positioning holes are matched with the shape of the target ball, and the target ball is at least partially embedded in the positioning hole for installation.

9. The precision adjustment method of claim 8, wherein, The target ball is magnetically fixed with the ring-shaped tool.

10. The precision adjustment method of claim 1, wherein, The step of arranging the target point unit at at least three calibration positions of the winding drum is specifically arranging one target point unit on the outside, the middle and the inside of the winding drum, respectively.

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