A coiler control method

Abstract

The application discloses a coiler control method, comprising the following steps: auxiliary coiler horizontal adjustment; auxiliary coiler roll gap setting; according to the strip thickness H, roll gap parameter setting of each auxiliary coiler is performed in advance, the first parameter is executed when the coiler is not formally started to work, and the second parameter is executed when the coiler is formally started to work; work state auxiliary coiler pressure control: after the coiler is started to work, the auxiliary coiler pressure is detected in real time, and when the pressure is greater than or equal to 30kN, the auxiliary coiler downward pressure is adjusted to 100-150kN; work state auxiliary coiler height adjustment. Through the parameter control method of the auxiliary coiler, the strip can be tightly pressed to ensure the winding shape in the production process, the probability of strip wearing and tearing is effectively reduced when thin strip steel is produced, the wear resistance of the auxiliary coiler is enhanced through the reinforcement and improvement of the structure of the auxiliary coiler, and the scratch defect on the surface of the strip is avoided.

Description

Technical Field

[0001] This application relates to the field of hot strip rolling coiling process control, and more particularly to a coiling machine control method. Background Technology

[0002] The coiler is a crucial piece of equipment in a hot rolling production line, responsible for coiling the strip steel from the hot rolling line into coils. It mainly includes pinch rolls, coiling aid rolls, and a coil drum. Each coiler has three coiling aid rolls, evenly distributed around the outer perimeter of the coil drum. When the strip head enters the coiler, the coiling aid rolls guide the strip head tightly around the coil drum, ensuring the strip enters the coiler with continuous tension until the drum opens and tension is established. After the strip tail leaves the pinch rolls, the coiling aid rolls control the tail end, preventing damage to the equipment due to the strip tail swinging, and preventing the coil from automatically unwinding until it is placed on the coil lifting device.

[0003] However, in actual production, the control of the winding aid rolls of the coiler is prone to the following problems:

[0004] (1) The control conditions for the roll gap size are stringent.

[0005] The coiling roller reduces the gap between itself and the coil drum to create pressure, guiding the strip head tightly around the drum and controlling the tail end of the strip. If the actual gap value is greater than the set value, the coiling roller will not compact the strip during coiling, resulting in poor coil shape. Insufficient compaction of the strip head also reduces friction, causing the coil to slip on the drum. If the actual gap value is smaller than the set value, problems such as strip hitting the drum (coiling roller colliding with the drum) and stuck strip during coiling are likely to occur when producing thinner strips.

[0006] Currently, during normal production of hot strip rolling auxiliary rolls, the roll gap distance is adjusted to the set value in one go. When rolling thin specifications (≤2.0mm), this adjustment method is prone to collision between the auxiliary roll and the roll at high speed, which seriously affects the service life of the auxiliary roll and the roll.

[0007] (2) Difficulty in controlling the pressure between the auxiliary roll and the strip.

[0008] Because the accuracy of the roll gap control between the auxiliary roll and the roll drum is difficult to control, it is easy to cause errors in the pressure control between the auxiliary roll and the strip. When the pressing strength of the auxiliary roll on the strip is insufficient, it is easy to cause problems such as poor roll shape at the head of the strip.

[0009] (3) When the auxiliary roll comes into contact with the high-temperature strip steel, it is easy to cause surface scratches and defects.

[0010] Because the auxiliary rolls press against the strip steel for a long time, they are severely oxidized and worn at high temperatures, causing iron oxide scale to stick to the auxiliary rolls, which can easily cause scratches on the surface of the strip steel. Summary of the Invention

[0011] Technical problem to be solved: The control of the auxiliary winding roller device in the current winding machine is relatively difficult, and it is easy to cause corresponding product defects due to improper setting of roller gap size and pressure, as well as defects in the material of the auxiliary winding roller itself; The purpose of this application is to provide a more efficient winding machine control method and its auxiliary winding roller that improves product quality.

[0012] Technical solution: This application discloses a winding machine control method, including the following steps:

[0013] Step 1: Horizontal Adjustment of the Auxiliary Rollers: Before production, simulate the gap distance between the three sets of auxiliary rollers and the drum to 2-3mm. Then, sequentially set the pressure limit of the uppermost auxiliary roller to 15kN; the pressure limit of the lowermost auxiliary roller to 30kN; and the pressure limit of the auxiliary roller on the other side to 20kN. Then, open the drum and align the center of the fan-shaped plate with the auxiliary rollers for pressure testing. Stop the test when each auxiliary roller reaches the set pressure limit. Then, measure the gap between the auxiliary roller and the drum 400-600mm from the end of the working section of the auxiliary roller towards its transmission section. If the gaps at both ends are the same, proceed to Step 2; if the gaps at both ends are unequal, adjust the auxiliary rollers to be horizontal with the drum, using the working section as a reference, and then proceed to Step 2.

[0014] Step 2: Zero-point adjustment of auxiliary winding roller pressure: After completing the horizontal adjustment of the auxiliary winding roller, unwind the drum and rotate the drum and auxiliary winding roller at a low speed of 4-8 m / s. During the rotation, record the working current of the auxiliary winding roller. Press down on each auxiliary winding roller with the corresponding pressure limit until the working current on the auxiliary winding roller changes, then stop pressing down. At this time, check whether the opening of the auxiliary winding roller is zero. If it is zero, proceed to step 3; if it is not zero, adjust the opening to zero and then proceed to step 3.

[0015] Step 3: Setting the gap between the coiling rollers: Based on the strip thickness H, pre-set the gap parameters for each coiling roller. The first preset parameter is: the gap between the uppermost coiling roller is H+9mm; the gap between the lowermost coiling roller is H+8mm; and the gap between the other coiling roller is H+6mm. The second preset parameter is: the gap between the uppermost coiling roller is H+9mm; the gap between the lowermost coiling roller is H+6mm; and the gap between the other coiling roller is H+3mm. Here, H is the strip thickness. The first parameter is used when the coiler is not yet in operation; the second parameter is used after the coiler has started operating.

[0016] Step 4: Working status auxiliary winding roller pressure control: After the winding machine starts working, the auxiliary winding roller pressure is monitored in real time. When the pressure is greater than or equal to 30kN, the downward pressure of the auxiliary winding roller is adjusted to 100-150kN.

[0017] Step 5: Adjusting the height of the coiling roller in working condition: Adjust the height of the coiling roller accordingly with the increase in steel coil thickness. Calculate the length of steel coil that the coiling roller can press within the steel coil thickness range. After pressing is completed in each thickness range, end the production process.

[0018] Furthermore, it also includes: Step Six: Cooling of the winding roller: After the current production process is completed, the winding roller is cooled by spraying water. At the same time, the winding roller and the drum are turned on to rotate at a low speed. After ensuring the cooling effect of the winding roller and that there is no liquid water droplet residue, return to Step One.

[0019] Furthermore, step four also includes: the ratio of the rotational speed of the assist roll to the lead rate of the strip feed speed is 5 to 11%.

[0020] Furthermore, the surface of the winding roller is provided with a hard alloy weld overlay layer, the thickness of which is 5-8 mm and the surface hardness is HRC 54-60; the two ends of the winding roller are provided with chamfers, the chamfer length to the total length ratio is 0.5-0.7, and the chamfer depth to the winding roller diameter ratio is 0.013.

[0021] Preferably, the cemented carbide is a cobalt-based alloy or a nickel-based alloy.

[0022] Beneficial effects: This application achieves the following by adjusting the parameters of the coiling roller: during the production process, it can both tightly press the strip steel to ensure the coil shape and effectively reduce the probability of strip hitting the roller when producing thin strip steel; and by strengthening and improving the structure of the coiling roller, its wear resistance is enhanced, avoiding scratches on the surface of the strip steel. Attached Figure Description

[0023] Figure 1 This is a flowchart of the control method of this application;

[0024] Figure 2 This is a schematic diagram of the structure of the winding roller in this application. Detailed Implementation

[0025] The technical solution of this application will be further described below with reference to the accompanying drawings. Example 1:

[0026] like Figure 2 As shown, the specific winding roller structure used in the following embodiments is as follows:

[0027] The winding roller used in this embodiment is made of 45# medium carbon steel, and its surface is welded using a nickel-based hard alloy, with an effective weld depth of 5mm and a surface hardness of HRC54. In this embodiment, the winding roller is a cylindrical roller with beveled ends, 380mm in diameter and 1500mm in length, with a chamfer length of 750mm and a chamfer depth of 2.5mm at both ends. The uppermost winding roller is designated as the first winding roller, the lowermost as the second winding roller, and the winding roller on the other side as the third winding roller, for simplicity. The wear on the winding roller is particularly severe at the strip edge; this chamfer design reduces the wear effect of the strip edge on the winding roller, preventing the possibility of step-like or groove-like defects on the edge, and effectively extending the service life of the winding roller.

[0028] The weld overlay of the roller is easily worn, with each grinding amount being 0.5 to 1 mm. Therefore, it needs to be replaced periodically after the production volume reaches about 300,000 to 350,000 tons / cycle or the production time reaches 4 to 5 weeks; it can also be reused after being ground again.

[0029] like Figure 1 As shown, the specific experimental method used in this embodiment is as follows:

[0030] Since the auxiliary winding rolls need to be leveled after each replacement, an uneven wear can lead to surface quality defects in the strip and poor coiling, such as a bowl-shaped coil. Therefore, the auxiliary winding rolls must be leveled first. The roll gap is set to 2mm, and the pressure settings are shown in Table 1: the first auxiliary winding roll pressure is set to 15kN, the second auxiliary winding roll pressure to 30kN, and the third auxiliary winding roll pressure to 20kN. The second auxiliary winding roll, being located at the bottom of the mandrel, tends to detach from the mandrel under its own weight, hence the higher pressure setting.

[0031] The specific process of horizontal adjustment is as follows: continuously expand the drum and align the middle of the fan-shaped plate with the auxiliary winding roller. As the drum comes into contact with the auxiliary winding roller, the pressure gradually increases. Stop when the pressure reaches the set pressure. Then, select 400mm from the end of the working section of the auxiliary winding roller towards its transmission section to measure the gap between it and the drum. If the gaps at both ends are not equal, take the working section as the reference and adjust the auxiliary winding roller and the drum to keep them horizontal before proceeding to the next step. In this embodiment, for accuracy, this horizontal adjustment is repeated twice.

[0032] Table 1 Pressure settings during horizontal adjustment

[0033] Auxiliary roller number Pressure setting First 15KN second 30KN third 20KN

[0034] After completing the horizontal adjustment of the auxiliary winding roller, the pressure zero-point adjustment of the auxiliary winding roller needs to be performed. The adjustment steps include: opening the drum, rotating the drum and auxiliary winding roller at a low speed of 4m / s, and recording the working current of the auxiliary winding roller during the rotation; pressing down each auxiliary winding roller with the corresponding pressure limit until the working current on the auxiliary winding roller changes, and then stopping the pressing down; at this time, checking whether the opening degree of the auxiliary winding roller is zero. If it is not zero, adjusting the opening degree to zero.

[0035] The purpose of zero-point pressure adjustment is to improve the accuracy of the roll gap of the winding aid roll. The winding equipment is subjected to impact and friction from the high-temperature strip steel, causing an increase in the gap between the winding aid roll, the drum, and other equipment, resulting in inaccurate roll gap. The accuracy of the roll gap directly affects the accuracy of the roll gap setting. Inaccurate roll gap positioning will lead to insufficient pressing of the winding aid roll, which easily results in poor head roll shape. Regularly leveling and calibrating the roll gap of the winding aid roll is necessary. Roll gap calibration is also required after replacing winding equipment such as winding aid rolls, drums, fan plates, hydraulic cylinders, and sensors.

[0036] Subsequently, based on the strip thickness H, which is 3mm in this embodiment, the roll gap parameters of each auxiliary winding roller are set in advance. The first preset parameter is: the roll gap of the uppermost auxiliary winding roller is H+9mm; the roll gap of the lowermost auxiliary winding roller is H+8mm; and the roll gap of the other auxiliary winding roller is H+6mm. The second parameter is: the roll gap of the uppermost auxiliary winding roller is H+9mm; the roll gap of the lowermost auxiliary winding roller is H+6mm; and the roll gap of the other auxiliary winding roller is H+3mm. When the coiler is not officially started, the first parameter is executed; when the coiler officially starts working, the second parameter is executed. This ensures that the roll gap is set in place before the strip head enters the auxiliary winding roller, preventing collisions between the auxiliary winding roller and the drum during high-speed operation when producing thin specifications, which would reduce the service life of the auxiliary winding roller and the drum.

[0037] The above are all the parameter adjustments before the coiler starts production. After that, the production process begins. First, the lead ratio between the speed of the auxiliary coiling roller and the strip feeding speed needs to be adjusted to 5% to better guide the strip head into the coil.

[0038] After the strip enters the coiler, the pressure of the auxiliary coiling roller is monitored in real time. When the pressure is greater than or equal to 30kN, the downward pressure of the auxiliary coiling roller is adjusted to be constant at 100kN. Increasing and stabilizing the pressure can effectively prevent the inner coil of the steel coil from loosening due to pressure fluctuations of the auxiliary coiling roller.

[0039] After pressure control adjustment, the position of the pinch roller is corrected accordingly, and the corrected offset is obtained. This offset is used to reset the roller gap, and the roller gap setting value becomes the difference between the original setting value and the offset. This ensures that the actual roller gap of each auxiliary winding roller is greater than the set value, so that the constant pressure control of the auxiliary winding roller can work normally throughout the pressing process. This offset is approximately 0.5 to 1.5 mm in multiple experiments, and 1 mm is taken in this embodiment.

[0040] As the production process continues and the thickness of the steel coil gradually increases, the height of the coiling roller needs to be adjusted accordingly to the increase in steel coil thickness. The length of steel coil pressed by the coiling roller within the steel coil thickness range is calculated based on the steel coil thickness range; as shown in Table 2.

[0041] Table 2 Pressing Length

[0042] Finished product thickness (mm) Length (m) 1.2≤h<2.3 20 2.3≤h<3.2 22 3.2≤h<4.0 25 4.0≤h<5.0 30 5.0≤h<7.0 35 7.0≤h<9.0 40 9.0≤h<11.0 45 11.0≤h<12.7 50 12.7≤h<15.0 55 15.0≤h<17.5 60 17.5≤h<20.0 65

[0043] After the current production process is completed, the auxiliary coiling roll is cooled by spraying water. At the same time, the auxiliary coiling roll and the coiling drum are turned on to rotate at a low speed. After ensuring the cooling effect of the auxiliary coiling roll and that there is no liquid water droplet residue, the wear condition of the auxiliary coiling roll is checked. The auxiliary coiling roll is replaced or the next process is carried out directly. This setting can effectively cool the auxiliary coiling roll while preventing the cooling water from cooling the strip steel.

[0044] The strip steel coils produced in this embodiment have no obvious surface defects and have excellent coil shape. Example 2:

[0045] like Figure 2 As shown, the specific winding roller structure used in the following embodiments is as follows:

[0046] The winding roller used in this embodiment is made of 35# medium carbon steel, and its surface is welded using a nickel-based hard alloy, with an effective weld depth of 8mm and a surface hardness of HRC60. In this embodiment, the winding roller is a cylindrical roller with beveled ends, 380mm in diameter and 1500mm in length, with a chamfer length of 750mm and a chamfer depth of 2.5mm at both ends. The uppermost winding roller is designated as the first winding roller, the lowermost as the second winding roller, and the winding roller on the other side as the third winding roller, for simplicity. The wear on the winding roller is particularly severe at the strip edge; this chamfer design reduces the wear effect of the strip edge on the winding roller, preventing the possibility of step-like or groove-like defects on the edge, and effectively extending the service life of the winding roller.

[0047] The weld overlay of the roller is easily worn, with each grinding amount being 0.5 to 1 mm. Therefore, it needs to be replaced periodically after the production volume reaches about 300,000 to 350,000 tons / cycle or the production time reaches 4 to 5 weeks; it can also be reused after being ground again.

[0048] like Figure 1 As shown, the specific experimental method used in this embodiment is as follows:

[0049] Because the auxiliary coiling rolls need to be leveled after each replacement, an uneven wear can lead to surface quality defects in the strip and poor coiling shape, such as a bowl-shaped coil. Therefore, the auxiliary coiling rolls must be leveled first. The roll gap is set to 3mm, and the pressure settings are shown in Table 1: the first auxiliary coiling roll pressure is set to 15kN, the second auxiliary coiling roll pressure to 30kN, and the third auxiliary coiling roll pressure to 20kN. The second auxiliary coiling roll, being located at the bottom of the mandrel, tends to detach from the mandrel under its own weight, hence the higher pressure setting.

[0050] The specific process of horizontal adjustment is as follows: continuously expand the drum and align the middle of the fan-shaped plate with the auxiliary winding roller. As the drum comes into contact with the auxiliary winding roller, the pressure gradually increases. Stop when the pressure reaches the set pressure. Then, select 600mm from the end of the working section of the auxiliary winding roller towards its transmission section to measure the gap between it and the drum. If the gaps at both ends are not equal, take the working section as the reference and adjust the auxiliary winding roller and the drum to keep them horizontal before proceeding to the next step. In this embodiment, for accuracy, this horizontal adjustment is repeated twice.

[0051] Table 1 Pressure settings during horizontal adjustment

[0052] Auxiliary roller number Pressure setting First 15KN second 30KN third 20KN

[0053] After completing the horizontal adjustment of the auxiliary winding roller, the pressure zero-point adjustment of the auxiliary winding roller needs to be performed. The adjustment steps include: opening the drum, rotating the drum and auxiliary winding roller at a low speed of 8m / s, and recording the working current of the auxiliary winding roller during the rotation; pressing down each auxiliary winding roller with the corresponding pressure limit until the working current on the auxiliary winding roller changes, and then stopping the pressing down; at this time, checking whether the opening degree of the auxiliary winding roller is zero. If it is not zero, adjusting the opening degree to zero.

[0054] The purpose of zero-point pressure adjustment is to improve the accuracy of the roll gap of the winding aid roll. The winding equipment is subjected to impact and friction from the high-temperature strip steel, causing an increase in the gap between the winding aid roll, the drum, and other equipment, resulting in inaccurate roll gap. The accuracy of the roll gap directly affects the accuracy of the roll gap setting. Inaccurate roll gap positioning will lead to insufficient pressing of the winding aid roll, which easily results in poor head roll shape. Regularly leveling and calibrating the roll gap of the winding aid roll is necessary. Roll gap calibration is also required after replacing winding equipment such as winding aid rolls, drums, fan plates, hydraulic cylinders, and sensors.

[0055] Subsequently, based on the strip thickness H, which is 2mm in this embodiment, the roll gap parameters of each auxiliary winding roller are set in advance. The first preset parameter is: the roll gap of the uppermost auxiliary winding roller is H+9mm; the roll gap of the lowermost auxiliary winding roller is H+8mm; and the roll gap of the other auxiliary winding roller is H+6mm. The second parameter is: the roll gap of the uppermost auxiliary winding roller is H+9mm; the roll gap of the lowermost auxiliary winding roller is H+6mm; and the roll gap of the other auxiliary winding roller is H+3mm. When the coiler is not officially started, the first parameter is executed; when the coiler officially starts working, the second parameter is executed. This ensures that the roll gap is set in place before the strip head enters the auxiliary winding roller, preventing collisions between the auxiliary winding roller and the drum during high-speed operation when producing thin specifications, which would reduce the service life of the auxiliary winding roller and the drum.

[0056] The above are all the parameter adjustments before the coiler starts production. After that, the production process begins. First, the lead ratio between the speed of the auxiliary coiling roller and the strip feeding speed needs to be adjusted to 11% to better guide the strip head into the coil.

[0057] After the strip enters the coiler, the pressure of the auxiliary coiling roller is monitored in real time. When the pressure is greater than or equal to 30kN, the downward pressure of the auxiliary coiling roller is adjusted to be constant at 150kN. Increasing and stabilizing the pressure can effectively prevent the inner ring of the steel coil from loosening due to pressure fluctuations of the auxiliary coiling roller.

[0058] After pressure control adjustment, the position of the pinch roller is corrected accordingly, and the corrected offset is obtained. This offset is used to reset the roller gap, and the roller gap setting value becomes the difference between the original setting value and the offset. This ensures that the actual roller gap of each auxiliary winding roller is greater than the set value, so that the constant pressure control of the auxiliary winding roller can work normally throughout the pressing process. This offset is approximately 0.5 to 1.5 mm in multiple experiments, and 1.5 mm is taken in this embodiment.

[0059] As the production process continues and the thickness of the steel coil gradually increases, the height of the coiling roller needs to be adjusted accordingly to the increase in steel coil thickness. The length of steel coil pressed by the coiling roller within the steel coil thickness range is calculated based on the steel coil thickness range; as shown in Table 2.

[0060] Table 2 Pressing Length

[0061] Finished product thickness (mm) Length (m) 1.2≤h<2.3 20 2.3≤h<3.2 22 3.2≤h<4.0 25 4.0≤h<5.0 30 5.0≤h<7.0 35 7.0≤h<9.0 40 9.0≤h<11.0 45 11.0≤h<12.7 50 12.7≤h<15.0 55 15.0≤h<17.5 60 17.5≤h<20.0 65

[0062] After the current production process is completed, the auxiliary coiling roll is cooled by spraying water. At the same time, the auxiliary coiling roll and the coiling drum are turned on to rotate at a low speed. After ensuring the cooling effect of the auxiliary coiling roll and that there is no liquid water droplet residue, the wear condition of the auxiliary coiling roll is checked. The auxiliary coiling roll is replaced or the next process is carried out directly. This setting can effectively cool the auxiliary coiling roll while preventing the cooling water from cooling the strip steel.

[0063] The strip steel coils produced in this embodiment have no obvious surface defects and have excellent coil shape.

Claims

1. A winding machine control method, characterized in that, Includes the following steps: Step 1: Horizontal Adjustment of the Auxiliary Rollers: Before production, simulate the gap distance between the three sets of auxiliary rollers and the drum to 2-3mm. Then, sequentially set the pressure limit of the uppermost auxiliary roller to 15kN; the pressure limit of the lowermost auxiliary roller to 30kN; and the pressure limit of the auxiliary roller on the other side to 20kN. Then, open the drum and align the center of the fan-shaped plate with the auxiliary rollers for pressure testing. Stop the test when each auxiliary roller reaches the set pressure limit. Then, measure the gap between the auxiliary roller and the drum 400-600mm from the end of the working section of the auxiliary roller towards its transmission section. When the gaps at both ends are equal, proceed to Step 2; when the gaps at both ends are unequal, adjust the auxiliary rollers to be horizontal with the drum, using the working section as a reference, and then proceed to Step 2. Step 2: Zero-point adjustment of auxiliary winding roller pressure: After completing the horizontal adjustment of the auxiliary winding roller, unwind the drum and rotate the drum and auxiliary winding roller at a low speed of 4-8 m / s. During the rotation, record the working current of the auxiliary winding roller. Press down on each auxiliary winding roller at the corresponding pressure limit until the working current on the auxiliary winding roller changes, then stop pressing down. At this point, check if the opening degree of the auxiliary winding roller is zero. If it is zero, proceed to step three; if it is not zero, adjust the opening degree to zero and then proceed to step three. Step 3: Setting the roll gap of the coiling rollers: Based on the strip thickness H, set the roll gap parameters for each coiling roller in advance. The first preset parameter is: the roll gap of the uppermost coiling roller is H+9mm; the roll gap of the lowermost coiling roller is H+8mm. The gap between the other auxiliary winding rollers is H+6mm; the second parameter is: the gap between the uppermost auxiliary winding rollers is H+9mm; the gap between the lowermost auxiliary winding rollers is H+6mm. The gap between the other side's auxiliary winding rollers is H+3mm; when the winding machine is not officially started, the first parameter is executed; when the winding machine officially starts working, the second parameter is executed. Step 4: Working status auxiliary winding roller pressure control: After the winding machine starts working, the auxiliary winding roller pressure is monitored in real time. When the pressure is greater than or equal to 30kN, the downward pressure of the auxiliary winding roller is adjusted to 100-150kN. Step 5: Adjusting the height of the coiling roller in working condition: Adjust the height of the coiling roller accordingly with the increase in steel coil thickness. Calculate the length of steel coil that the coiling roller can press within the steel coil thickness range. After pressing is completed in each thickness range, end the production process.

2. The winding machine control method according to claim 1, characterized in that, It also includes: Step Six: Cooling the winding roller: After the current production process is completed, the winding roller is cooled by spraying water. At the same time, the winding roller and the drum are turned on to rotate at a low speed. After ensuring the cooling effect of the winding roller and that there is no liquid water droplet residue, return to Step One.

3. The winding machine control method according to claim 1, characterized in that, Step four also includes: the ratio of the rotational speed of the assisting roll to the lead rate of the strip feed speed is 5 to 11%.

4. The winding machine control method according to any one of claims 1-3, characterized in that, The surface of the winding roller is provided with a hard alloy weld overlay layer, the thickness of which is 5-8 mm and the surface hardness is HRC 54-60; the two ends of the winding roller are chamfered, the chamfer length is 0.5-0.7 of the total length and the chamfer depth is 0.013 of the diameter of the winding roller.

5. The winding machine control method according to claim 4, characterized in that, The cemented carbide is a cobalt-based alloy or a nickel-based alloy.

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