Quick calibration and verification device and method for the height of the mandrel support rollers at the front of the tandem rolling mill

Abstract

The present application discloses a device and method for quickly calibrating and verifying the height of the mandrel support rollers at the front stage of a continuous rolling mill, which relates to the technical field of steel pipe production. It includes a main body part and a plurality of calibration and verification parts that are arranged on the main body part in a manner that can be independently driven to move up and down. Each calibration and verification part is provided with a calibration and verification arc, and the diameter of the calibration and verification arc of each calibration and verification part is the same as the diameter of the mandrel of the corresponding model. During calibration or verification, the calibration and verification part corresponding to a certain mandrel is driven to move downward so that the axis of its calibration and verification arc coincides with the center line of the standard position of the mandrel, thereby calibrating and verifying the position of the roller for this mandrel. The tool of the present application is simple and easy to obtain, the calibration time is short, the calibrated height position is accurate, the universality is better, the efficiency and effect of the calibration work can be effectively improved, and at the same time, the verification of the height of the mandrel support roller is more convenient.

Description

Technical Field

[0001] The present application relates to the technical field of steel pipe production, in particular to a device and method for quickly calibrating and verifying the height of a mandrel support roller at the front stage of a continuous rolling mill. Background Technique

[0002] As one of the main deformation processes in the production of hot-rolled seamless steel pipes, the mandrel is a key internal deformation tool in the continuous rolling mill. During the rolling process, the mandrel and the rolls of the continuous rolling mill work together to roll the seamless steel pipe blank to the preset wall thickness.

[0003] During the production process of the continuous rolling mill, a set of mandrels is recycled. After rolling, the mandrels are cooled and lubricated and then returned to the front stage of the continuous rolling mill to wait for rolling again. Before rolling starts, the lubricated mandrels are horizontally moved onto the mandrel support rolls and are driven by a limit rack to penetrate into the inside of the seamless steel pipe blank. Then, they enter the continuous rolling mill together with the seamless steel pipe blank for rolling.

[0004] During the process of the mandrel penetrating into the seamless steel pipe blank, the center height of the mandrel should be consistent with the height of the rolling center line of the continuous rolling mill to ensure the wall thickness accuracy of the rough pipe after continuous rolling, reduce the consumption of the mandrel, and improve the service life of the mandrel. For mandrels with different diameters, to ensure that the center height of the mandrel is consistent with the height of the rolling center line, it is necessary to accurately adjust the height of the mandrel support rolls according to the change in the mandrel diameter.

[0005] In the actual production line, the height adjustment of the mandrel support rolls is usually driven by a hydraulic cylinder assembly. The hydraulic cylinder assembly is equipped with a displacement sensor. The automatic control program outputs a displacement command, and the hydraulic cylinder assembly drives the mandrel support rolls to run to the preset height according to the received displacement command. Before the automatic control program outputs the displacement command, it is necessary to calibrate and fit the position of the hydraulic cylinder assembly corresponding to the mandrel support rolls: within the operating range of the hydraulic cylinder assembly, a series of position points are randomly selected, the height of the mandrel support rolls is measured, and the corresponding mandrel diameter value consistent with the height of the rolling center line is calculated. Through data analysis, a mathematical relationship between the displacement value of the hydraulic cylinder assembly and the height of the mandrel of the mandrel support rolls is fitted. Then, the mandrel diameter value used in actual production is input into the obtained mathematical relationship to calculate the corresponding displacement value of the hydraulic cylinder assembly.

[0006] During the calibration process of the conventional mandrel support roll, it is necessary to manually measure the height of the roll surface of the mandrel support roll multiple times. In actual operation, the height of the cylindrical area at the outer edge of the roll body is usually measured, and then the mandrel center height is calculated through the theoretical outer diameter of the roll body. Since manual measurement is extremely inconvenient, even if an auxiliary measurement tool is designed, it is impossible to avoid random deviations in the measurement results. At the same time, factors such as the machining accuracy of the roll body and equipment wear will also cause measurement deviations. The accumulation of multiple factors further expands the measurement deviation. The displacement data of the hydraulic cylinder assembly calculated by fitting a mathematical relationship with a set of data with random deviations will also inevitably deviate from the actual value, ultimately resulting in a deviation between the mandrel center height and the rolling center line height, affecting product quality and mandrel life. Summary of the Invention

[0007] In order to improve the problem that during the calibration process of the conventional mandrel support roll, it is easy to produce errors when manually measuring the height of the roll surface of the mandrel support roll multiple times, which ultimately leads to a deviation between the mandrel center height and the rolling center line height, affecting product quality and mandrel life, the present application provides a device and method for quickly calibrating and verifying the height of the mandrel support roller at the front desk of a continuous rolling mill.

[0008] The device and method for quickly calibrating and verifying the height of the mandrel support roller at the front desk of a continuous rolling mill provided by the present application adopt the following technical solutions:

[0009] In a first aspect, a device for quickly calibrating and verifying the height of the mandrel support roller at the front desk of a continuous rolling mill includes a main body member and a plurality of calibration and verification members that are arranged on the main body member in a manner that can be independently driven to move up and down. Each calibration and verification member is provided with a calibration and verification arc, and the diameter of the calibration and verification arc of each calibration and verification member is the same as the diameter of the corresponding type of mandrel. During calibration or verification, the calibration and verification member corresponding to a certain mandrel is driven to move downwards so that the axis of its calibration and verification arc coincides with the center line of the standard position of the mandrel, thereby calibrating and verifying the position of the support roller for the mandrel.

[0010] Optionally, a plurality of moving grooves with the same number as the calibration and verification members are provided along the vertical direction on the bottom side of the main body member, and the plurality of calibration and verification members can be slidably inserted into the moving grooves; a plurality of adjusting screws for replacing the calibration and verification members are provided inside the main body member. The adjusting screws are rotatably inserted into the main body member along the vertical direction, and one end of the adjusting screw inserted into the main body member is in threaded cooperation with the calibration and verification member.

[0011] Optionally, a connecting plate is provided at one end of each of the plurality of calibration and verification members inserted into the main body member. Limiting plates are provided on both sides of the connecting plate, and limiting grooves are provided along the vertical direction on the side wall of the main body member where the moving groove is located. The limiting plates are inserted into the limiting grooves so that the calibration and verification member just moves out of the main body member.

[0012] Optionally, the calibration and verification member is detachably connected to the moving plate.

[0013] Optionally, a connecting plate is provided on the planar side of the calibration verification piece along the vertical direction. The connecting plate is inserted into the moving plate, and a fastening member for fixing the connecting plate is provided in the moving plate.

[0014] Optionally, an installation groove is provided on the bottom side of the moving plate along the vertical direction. The connecting plate is inserted into the connecting groove. Installation holes are provided on the two side walls of the installation groove, and the fastening member is arranged in the installation holes; the fastening member is a spring bolt, and the bolt head is arc-shaped. An arc-shaped card slot is provided on the side wall of the connecting plate, and the spring bolt is inserted into the card slot to fix the connecting plate in the installation groove.

[0015] Optionally, a maintenance opening communicating with the moving groove is provided at the top of the main body member. A cover plate for closing the maintenance opening is provided on the main body member. A plurality of the adjusting screws are rotatably arranged on the cover plate, and the cover plate is fixed to the main body member by screws.

[0016] Optionally, support plates are provided at both ends of the main body member, and the two support plates are respectively placed on both sides of the mandrel position.

[0017] Optionally, the distance from the center of the calibration verification piece to the support plate is the same as the horizontal distance from the rolling center line to the support plate.

[0018] In a second aspect, a method for quickly calibrating and verifying the height of the mandrel support roller at the front stage of a continuous rolling mill includes the following steps:

[0019] S1. During calibration, according to the mandrel size, select the corresponding calibration verification piece, and rotate the adjusting screw to move the corresponding calibration verification piece to the lower side of the main body member;

[0020] S2. Vertically place the main body member above the mandrel position, check and confirm that the support plates on both sides of the main body member are on the same horizontal line, and use a level to check and confirm that the support plates are in a vertical state;

[0021] S3. Slowly move the mandrel support roller so that both sides of the V-shaped roller surface of the mandrel support roller just contact the arc surface of the calibration verification piece;

[0022] S4. The automation program records the reading of the hydraulic cylinder displacement sensor at this time, and completes the calibration of the mandrel position of the mandrel support roller corresponding to this specification of the mandrel;

[0023] S5. Replace the mandrel with a different diameter, and at the same time select the corresponding calibration verification piece, and repeat S1 - S4;

[0024] S6. During verification, automatically move the mandrel support roller to the mandrel position of the currently used mandrel;

[0025] S6. Vertically place the main body above the mandrel position so that the main body is directly above the cross-section of the mandrel support roller.

[0026] S8. Use a feeler gauge to measure the gaps on both sides between the calibration verification piece and the V-shaped roller surface of the mandrel support roller, and judge whether the position of the mandrel support roller meets the production requirements according to the gap measurement results.

[0027] In summary, the present application includes at least one of the following beneficial effects:

[0028] 1. During calibration, according to the diameter specification of the mandrel actually used, design the corresponding main body. The projection of the calibration verification piece in the vertical plane coincides with the cross-section projection of the corresponding mandrel currently used at the mandrel position. The contact state between the arc surface of the calibration verification piece and the mandrel support roller is the same as the contact state between the mandrel actually used and the mandrel support roller at the mandrel position. In this way, the accurate height position of the mandrel support roller at the mandrel position in actual production can be directly determined. The tool is simple and easy to obtain, the calibration time is short, the calibrated height position is accurate, and the efficiency and effect of the calibration work can be effectively improved.

[0029] 2. During verification, only need to automatically move the mandrel support roller to the mandrel position of the mandrel currently used, then vertically place the corresponding main body on the limit rack guide rail, horizontally move the main body so that it is directly above the cross-section of the mandrel support roller, use a feeler gauge to measure the gaps on both sides between the calibration verification piece and the V-shaped roller surface of the mandrel support roller, and judge whether the position of the mandrel support roller meets the production requirements according to the gap measurement results. If it does not meet the requirements, re-calibration is required.

[0030] 3. When calibrating mandrels with different diameters, the same calibration verification piece can be selected by adjusting the screw, which is more convenient to use. There is no need to produce different calibration calipers according to mandrels of different sizes, and the versatility is better. At the same time, the calibration verification piece is detachable, which is convenient to replace the calibration verification piece regularly and can avoid measurement errors caused by damage to the calibration verification piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic structural diagram of an embodiment of the present application;

[0032] Figure 2 A front sectional view of an embodiment of the present application;

[0033] Figure 3 is Figure 1 an enlarged view of part A in

[0034] Figure 4 a bottom view of an embodiment of the present application;

[0035] Figure 5 a top view of an embodiment of the present application;

[0036] Figure 6It is a usage state diagram of an embodiment of the present application.

[0037] Explanation of reference numerals:

[0038] 1. Main body; 11. Calibration and verification part; 111. Connection plate; 112. Card slot; 12. Moving slot; 121. Limiting slot; 13. Moving plate; 131. Limiting plate; 132. Installation slot; 14. Fastening part; 15. Support plate; 16. Handle; 17. Maintenance opening; 18. Cover plate; 2. Adjusting screw. Specific embodiments

[0039] The following uses specific examples to illustrate the implementation manners of the present application. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification. The present application can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that the drawings provided in the following embodiments only illustrate the basic concept of the present application in a schematic manner. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0040] Among them, the drawings are only used for exemplary illustration, showing only schematic diagrams, not physical diagrams, and cannot be understood as a limitation to the present application; in order to better illustrate the embodiments of the present application, some components in the drawings will be omitted, enlarged or reduced, which do not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0041] The following combines the attached Figures 1-6 to further elaborate on the embodiments of the present application.

[0042] The embodiment of the present application provides a device and method for quickly calibrating and verifying the height of the front-core rod support roller of a continuous rolling mill. Refer to Figure 1 and Figure 2 , the device for quickly calibrating and verifying the height of the front-core rod support roller of a continuous rolling mill includes a main body 1. The main body 1 includes a main body 1 and a plurality of calibration and verification parts 11 corresponding to core rods with different diameters. The bottom side of the calibration and verification part 11 is provided with arc surfaces with diameters corresponding to core rods with different diameters respectively. In this embodiment, the calibration and verification part 11 is a semi-circular plate. The plane sides of the plurality of calibration and verification parts 11 are arranged on the lower side of the main body, and the centers of the calibration and verification parts 11 are located on the same horizontal line. In this embodiment, three calibration and verification parts 11 are provided, and the three calibration and verification parts 11 are arranged in descending order. Moreover, the plurality of calibration and verification parts 11 can all move into the main body 1. The arc surface of the calibration and verification part 11 is in surface contact with the surface of the core rod position, and the projection of the calibration and verification part 11 in the vertical plane coincides with the cross-sectional projection of the actually used core rod when it is in the core rod position.

[0043] Referring to Figure 2 and Figure 4 , a moving groove 12 is arranged upwards on the bottom side of the main body 1. The number of the moving grooves 12 is the same as that of the calibration verification pieces 11. The plane sides of the three calibration verification pieces 11 are respectively inserted into the three moving grooves 12, and the calibration verification pieces 11 can be completely moved into the moving grooves 12. An adjusting screw rod 2 is arranged vertically on the top of the main body 1. The lower end of the adjusting screw rod 2 is inserted into the main body 1 and is rotatably arranged on the main body 1. One end of the adjusting screw rod 2 inserted into the main body 1 is inserted into the calibration verification piece 11, and a threaded sleeve is fixed on the plane side of the calibration verification piece 11. The adjusting screw rod 2 is in threaded cooperation with the threaded sleeve. By rotating the adjusting screw rod 2, the calibration verification piece 11 can move vertically, and the corresponding calibration verification piece 11 can be replaced according to the calibrated mandrel size, which is more convenient to use and has better versatility. In order to facilitate the rotation of the adjusting screw rod 2, the top of the adjusting screw rod 2 is set as an internal hexagonal nut.

[0044] Referring to Figure 2 , in order to avoid the situation of calibration error caused by inaccurate position of the calibration verification piece 11 when replacing the calibration verification piece 11, a moving plate 13 is arranged vertically on the plane side of the calibration verification piece 11. The moving plate 13 is inserted into the moving groove 12, and the adjusting screw rod 2 is inserted into the moving plate 13, and the threaded sleeve is fixed on the moving plate 13. Limiting plates 231 are arranged vertically on both sides of the moving plate 13. Limiting grooves 121 are arranged vertically on the two side walls of the main body 1 where the moving groove 12 is located, and the limiting grooves 121 extend to a position close to the notch of the moving groove 12. The limiting plates 231 are inserted into the limiting grooves 121. When replacing the calibration verification piece 11, when the calibration verification piece 11 just moves out of the main body 1, the limiting plate 131 abuts against the bottom wall of the limiting groove 121, which can limit the moving stroke of the calibration verification piece 11 and can also position the position of the calibration verification piece 11, making the calibration more accurate.

[0045] Referring to Figure 2 and Figure 3The calibration verification piece 11 is prone to friction during long-term use, which causes the calibration verification piece 11 to be worn and the calibration result is prone to errors. In order to reduce the calibration error, the calibration verification piece 11 needs to be replaced regularly. In order to facilitate the replacement of the calibration verification piece 11, a mounting groove 132 is opened in the vertical direction at the bottom of the movable plate 13, and a connecting plate 111 is arranged in the vertical direction on the plane side of the calibration verification piece 11. The connecting plate 111 is inserted into the mounting groove 132, and mounting holes are opened on the groove walls on both sides of the mounting groove 132. A clamping piece 14 for fixing the connecting plate 111 is fixed in the mounting hole. In this embodiment, the clamping piece 14 is a spring latch, and the latch head is arc-shaped and extends out of the mounting hole. Arc-shaped clamping grooves 112 are opened on the side walls on both sides of the connecting plate 111.

[0046] When the connecting plate 111 is inserted into the installation slot 132, the connecting plate 111 squeezes the pin into the installation hole, and the pin is inserted into the slot 112 of the connecting plate 111 under the action of the spring, and the calibration verification piece 11 is fixed on the movable plate 13, which is convenient for regular replacement of the calibration verification piece 11. At the same time, the position of the connecting plate 111 needs to be staggered with the adjusting screw 2, and two connecting plates 111 on the same calibration verification piece 11 are symmetrically arranged, and two installation slots 132 are also symmetrically arranged. The adjusting screw 2 is located between the two connecting plates 111, which can make the calibration verification piece 11 more evenly stressed and more firmly installed.

[0047] Reference Figure 2 and Figure 5 The main body 1 is prone to damage during long-term use. In order to facilitate maintenance or replacement of parts, two inspection ports 17 are opened on the top of the main body 1. The inspection ports 17 are connected to the movable groove 12 and the limit groove 121. A cover plate 18 is also provided on the main body 1. The cover plate 18 can close the inspection port 17. The cover plate 18 is fixed to the main body 1 by screws. The adjusting screw 2 is rotatably set on the cover plate 18. After opening the cover plate 18, the adjusting screw 2, the connecting plate 111 and the calibration check piece 11 can be taken out of the main body 1 for maintenance or replacement. At the same time, lubricating oil can be added to the movable groove 12 through the inspection port 17 to reduce the friction between the movable plate 13 and the groove wall of the movable groove 12, so that the movable plate 13 moves more smoothly, and the wear of the movable plate 13 and the main body 1 can be reduced.

[0048] Reference Figure 1 and Figure 2 Two identical support plates 15 are arranged at both ends of the main body 1. The two support plates 15 are respectively placed on two limit rack guide rails of the equipment. The distance from the center of the calibration piece 11 to the support plate 15 is the same as the distance from the rolling center line to the limit rack guide surface.

[0049] Meanwhile, in order to facilitate the picking up and placing of the main body member 1, a handle 16 is also provided at the middle position on the top side of the main body member 1.

[0050] A method for quickly calibrating and verifying the height of a mandrel support roller at the front desk of a continuous rolling mill includes the following steps:

[0051] Step 1: During calibration, according to the mandrel size, select the corresponding calibration and verification piece 11, and rotate the adjusting screw 2 to move the corresponding calibration and verification piece 11 to the lower side of the main body member 1.

[0052] Step 2: Vertically place the main body member 1 above the mandrel position, check and confirm that the two support plates 15 on both sides of the main body member 1 are on the same horizontal line, and use a level to check and confirm that the support plates 15 are in a vertical state.

[0053] Step 3: Slowly move the mandrel support roller so that both sides of the V-shaped roller surface of the mandrel support roller just contact the arc surface of the calibration and verification piece 11.

[0054] Step 4: The automated program records the reading of the hydraulic cylinder displacement sensor at this time, and completes the calibration of the mandrel position of the mandrel support roller corresponding to this specification of mandrel.

[0055] Step 5: Replace mandrels with different diameters, and at the same time select the corresponding calibration and verification pieces 11, and repeat Steps 1 - 4.

[0056] Step 6: During verification, automatically run the mandrel support roller to the mandrel position of the currently used mandrel.

[0057] Step 7: Vertically place the main body member 1 above the mandrel position so that the main body member 1 is directly above the cross-section of the mandrel support roller.

[0058] Step 8: Use a feeler gauge to measure the gaps between the calibration and verification piece 11 and both sides of the V-shaped roller surface of the mandrel support roller, and judge whether the position of the mandrel support roller meets the production requirements according to the gap measurement results.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not intended to limit. Although the present application has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present application can be modified or equivalently replaced without departing from the purpose and scope of the present technical solution, and they should all be covered within the scope of the claims of the present application.

Claims

1. A device for quickly calibrating and verifying the height of the mandrel support rollers at the front stage of a continuous rolling mill, characterized in that: it includes a main body member (1) and a plurality of calibration and verification members (11) arranged on the main body member (1) in a manner that can be independently driven to move up and down. Each calibration and verification member is provided with a calibration and verification arc, and the diameter of the calibration and verification arc of each calibration and verification member is the same as the diameter of the mandrel of the corresponding model. During calibration or verification, the calibration and verification member corresponding to a certain mandrel is driven to move downwards so that the axis of its calibration and verification arc coincides with the center line of the standard position of the mandrel, thereby calibrating and verifying the position of the roller for this mandrel; on the bottom side of the main body member (1), there are moving grooves (12) arranged in the vertical direction and having the same number as the calibration and verification members (11). A plurality of the calibration and verification members (11) can be slidably inserted into the moving grooves (12). Inside the main body member (1), there are multiple groups of adjusting screws (2) for replacing the calibration and verification members (11). The adjusting screws (2) are rotatably inserted into the main body member (1) in the vertical direction, and one end of the adjusting screw (2) inserted into the main body member (1) is in threaded cooperation with the calibration and verification member (11); a threaded sleeve is fixed on the planar side of the calibration and verification member (11), and the adjusting screw (2) is in threaded cooperation with the threaded sleeve. By rotating the adjusting screw (2), the calibration and verification member (11) can be moved vertically.

2. The device for quickly calibrating and verifying the height of the mandrel support rollers at the front stage of a continuous rolling mill according to claim 1, characterized in that: one end of each of the plurality of calibration and verification members (11) inserted into the main body member (1) is provided with a connecting plate (111). On both sides of the connecting plate (111), there are limiting plates (131). On the side wall of the main body member (1) where the moving groove (12) is located, there is a limiting groove (121) arranged in the vertical direction. The limiting plate (131) is inserted into the limiting groove (121) so that the calibration and verification member (11) just moves out of the main body member (1).

3. The device for quickly calibrating and verifying the height of the mandrel support rollers at the front stage of a continuous rolling mill according to claim 2, characterized in that: the calibration and verification member (11) is detachably connected to the moving plate (13).

4. The device for quickly calibrating and verifying the height of the mandrel support rollers at the front stage of a continuous rolling mill according to claim 3, characterized in that: a connecting plate (111) is arranged on the planar side of the calibration and verification member (11) in the vertical direction. The connecting plate (111) is inserted into the moving plate (13), and a fastening member (14) for fixing the connecting plate (111) is arranged inside the moving plate (13).

5. The device for quickly calibrating and verifying the height of the mandrel support rollers at the front stage of a continuous rolling mill according to claim 4, characterized in that: An installation groove (132) is provided in the vertical direction on the bottom side of the moving plate (13). The connecting plate (111) is inserted into the installation groove (132). Installation holes are provided on the two side walls of the installation groove (132). The fastening member (14) is arranged in the installation holes. The fastening member (14) is a spring bolt, and the bolt head is arc-shaped. An arc-shaped card slot (112) is provided on the side wall of the connecting plate (111). The spring bolt is inserted into the card slot (112) to fix the connecting plate (111) in the installation groove (132).

6. The quick calibration and verification device for the height of the front core rod support roller of a continuous rolling mill according to claim 1, characterized in that: A maintenance opening (17) communicating with the moving groove (12) is provided at the top of the main body member (1). A cover plate (18) for closing the maintenance opening (17) is provided on the main body member (1). A plurality of adjusting screws (2) are rotatably arranged on the cover plate (18), and the cover plate (18) is fixed to the main body member (1) by screws.

7. The quick calibration and verification device for the height of the front core rod support roller of a continuous rolling mill according to claim 1, characterized in that: Support plates (15) are provided at both ends of the main body member (1), and the two support plates (15) are respectively placed on both sides of the core rod position.

8. The quick calibration and verification device for the height of the front core rod support roller of a continuous rolling mill according to claim 7, characterized in that: The distance from the center of the calibration and verification member (11) to the support plate (15) is the same as the horizontal distance from the rolling center line to the support plate (15).

9. A method for quickly calibrating and verifying the height of the front core rod support roller of a continuous rolling mill, characterized in that: Using the quick calibration and verification device for the height of the front core rod support roller of a continuous rolling mill described in any one of claims 1-8 above, including the following steps: S1. During calibration, select the corresponding calibration and verification member (11) according to the core rod size, and rotate the adjusting screw (2) to move the corresponding calibration and verification member (11) to the lower side of the main body member (1). S2. Vertically place the main body member (1) above the core rod position, check and confirm that the support plates (15) on both sides of the main body member (1) are on the same horizontal line, and use a level to check and confirm that the support plates (15) are in a vertical state. S3. Slowly move the core rod support roller so that both sides of the V-shaped roller surface of the core rod support roller just contact the arc surface of the calibration and verification member (11). S4. The automation program records the reading of the hydraulic cylinder displacement sensor at this time to complete the calibration of the core rod position corresponding to the core rod support roller of this specification core rod. S5. Replace the core rods with different diameters, and at the same time select the corresponding calibration and verification members (11), and repeat S1-S4. S6. During verification, automatically run the core rod support roller to the core rod position of the currently used core rod. S6. Vertically place the main body member (1) above the core rod position so that the main body member (1) is directly above the cross-section of the core rod support roller. S8. Use a feeler gauge to measure the gaps between the calibration and verification member (11) and both sides of the V-shaped roller surface of the core rod support roller, and judge whether the position of the core rod support roller meets the production requirements according to the gap measurement results.

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