A method and device for automatic measurement and correction of large cylindrical structural parts

Abstract

The present invention provides an automatic measurement and correction method and device for large cylindrical structural parts, belonging to the field of high-precision measurement technology, including online detection of the surface shape of large cylindrical structural parts, accurate feeding during the correction process, and bidirectional correction after feeding. The present invention adopts a follow-up three-point measurement method to avoid measurement errors caused by the placement position deviation of large cylindrical structural parts. The placement position error will not affect the measurement accuracy. The online detection device of the present invention has a small structure and can be installed in a bidirectional correction device for online automatic measurement. At the same time, the measurement efficiency is improved and the handling of large cylindrical structural parts is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of high-precision measurement, and in particular relates to an automatic measurement and correction method and device for a large cylindrical structural member. Background Art

[0002] The measurement and correction of large structural parts is a necessary key process in the manufacturing process of large structural parts. It can be the precursor of the machining process or the final process of the entire manufacturing process.

[0003] With the rapid development of my country's manufacturing industry, large structural parts currently have the characteristics of large size, heavy weight and high shape accuracy. Especially in the fields of underwater equipment manufacturing, ship transportation, petrochemical industry, etc., the demand for large cylindrical structural parts is increasing, which puts higher requirements on measurement and correction technology.

[0004] At present, the measurement and correction process used in manufacturing large cylindrical structural parts is manual measurement and correction. The measurement is carried out on the measurement platform by manual marking, sample measurement, and manual marking. After measurement, the overhead crane is lifted to the correction equipment, and correction processing is carried out according to the marked points. After processing, it is lifted out and measured again, and this process is repeated. This measurement and correction method has low efficiency and low accuracy, high labor intensity for operators, and multiple lifting will increase unsafe factors.

[0005] However, current large-scale automated detection devices take a long time to measure, are unable to quickly detect the value of a certain location point, and are unable to measure online, so they require a detection platform.

[0006] Therefore, based on these situations, realizing rapid measurement and precise automatic correction processing of large cylindrical structural parts has important practical significance for improving the measurement and correction accuracy and efficiency of large cylindrical structural parts. Summary of the invention

[0007] The problem to be solved by the present invention is to provide an automatic measurement and correction method and device for large cylindrical structural parts.

[0008] In order to solve the above technical problems, the technical solution adopted by the present invention is: an automatic measurement and correction method for a large cylindrical structural member, comprising the following steps:

[0009] S1. Online detection of surface shape of large cylindrical structural parts:

[0010] Adopt the follow-up three-point measurement method or the height two-point measurement method, calculate and fit the actual digital module value of the surface chord height of the large cylindrical structural part, and then compare the actual digital module value with the ideal digital module value to determine whether the arc size of the large cylindrical structural part is qualified. If qualified, it will enter the next process; if unqualified, this value is used to calculate the process parameters during the correction processing, and the material is sent to the two-way correction device for correction;

[0011] S2. Online measurement of the feeding position of large cylindrical structural parts to achieve accurate feeding during the correction process of large cylindrical structural parts:

[0012] The arc length and angle automatic conversion method is adopted to accurately control the feeding amount of large cylindrical structural parts. When the follow-up feeding trolley is feeding, the large cylindrical structural parts and the rotation angle measuring mechanism are driven by friction. The rotation angle measuring mechanism measures the rotation arc length of the large cylindrical structural parts through the rotary encoder, and converts it into the rotation angle of the large cylindrical structural parts through calculation, so as to accurately control the feeding rotation angle of the large cylindrical structural parts.

[0013] S3. Bidirectional correction of large cylindrical structural parts:

[0014] The large cylindrical structural parts to be corrected are fed to the corresponding positions, and hydraulic bidirectional top pressure is used to realize the bidirectional correction of the large cylindrical structural parts in the forward and reverse directions. The correction pressure is digitally controlled by a proportional pressure valve, and the correction amount is digitally controlled by a linear displacement sensor, ultimately realizing the accurate implementation of the correction process parameters.

[0015] Furthermore, when the large cylindrical structural member is cylindrical, a follow-up three-point measurement method is used for measurement, and the follow-up three-point measurement method includes the following steps:

[0016] S11, using three measuring elements arranged side by side horizontally, with the middle measuring element measuring the zero point as the coordinate origin o, the measuring element measuring the reverse direction as the x direction, and the measuring element measuring the vertical direction as the y direction, to form an xoy plane coordinate system;

[0017] S12. Define the coordinates of the measuring points of the three measuring elements in the xoy plane coordinate system as A , B (Xb, Yb), C (Xc, Yc), whose values ​​can be determined according to the installation position; define the coordinates of the middle point between A and B as D (Xd, Yd), and the coordinates of the middle point between B and C as E (Xe, Ye); define the coordinates of the center point of the large cylindrical structure O (Xo, Yo);

[0018] S13. Obtain the chord height formed by three measuring points of a large cylindrical structural member and the actual digital modulus value, including:

[0019] Calculate the coordinates of the middle points D and E, respectively D , E((X b +X c ) / 2,(Y b +Y c ) / 2).

[0020] Calculate the coordinates of the center point O of the structural member:

[0021] ;

[0022] ;

[0023] Calculate the measured radius Ro of large cylindrical structural parts:

[0024] ;

[0025] Calculate the measured chord height Ho of large cylindrical structural members:

[0026] .

[0027] Furthermore, when the large cylindrical structural member is a conical cylindrical member, a two-point height measurement method is used for measurement, and the two-point height measurement method includes the following steps:

[0028] S101, obtaining basic data of the bottom radius Ro (standard size) and semi-cone angle α (standard size) of the conical cylinder of a large cylindrical structural member;

[0029] S102, calculating the parameters of the current measured height according to the height Hc of the height measuring element, specifically including:

[0030] Calculate the current height standard radius Rx of large cylindrical structural parts:

[0031] Rx=Ro-Hc tanα;

[0032] Calculate the current standard chord height Hx of large cylindrical structural members:

[0033] Hx=Rx-Rx cos( );

[0034] Among them, M (Xm, Ym) and N (Xn, Yn) are the detection point coordinates of the two measuring elements based on the horizontal plane coordinate system at the Hx detection height.

[0035] Furthermore, with the support of the process parameter database, adaptive adjustment of the correction parameters of large cylindrical structural parts is completed; similar process parameter packages are found from the process parameter database according to the specification parameters and material parameters of the large cylindrical structural parts, and the actual digital-to-analog values ​​obtained in step S1 are transmitted to the process parameter database, and the process parameter package in the process parameter database is adjusted to form a new process parameter package, thereby realizing automatic correction of large cylindrical structural parts.

[0036] The present invention also provides an automatic measurement and correction device for large cylindrical structural parts, including an online detection device, a rotation angle measuring mechanism and a bidirectional correction device, the bidirectional correction device including a bidirectional pressing mechanism, the bidirectional pressing mechanism including an inner wall pressing mechanism and an outer wall pressing mechanism arranged opposite to each other; the online detection device and the rotation angle measuring mechanism are both installed on the bidirectional correction device, located on one side of the outer wall pressing mechanism; the rotation angle measuring mechanism includes a rotation angle measuring friction wheel, a rotation angle measuring sensor, a rotation angle measuring follower spring and a rotation angle measuring follower cylinder, the rotating shaft of the rotation angle measuring friction wheel is connected to the output end of the rotation angle measuring follower cylinder through a rotation angle measuring follower spring, and a rotation angle measuring sensor is arranged on the rotation angle measuring friction wheel.

[0037] Furthermore, an inner wall pressing block and an outer wall pressing block are respectively arranged at the central relative positions of the inner wall pressing mechanism and the outer wall pressing mechanism, inner wall pressing support blocks are symmetrically arranged on both sides of the inner wall pressing block, and outer wall pressing support blocks are symmetrically arranged on both sides of the outer wall pressing block, and the distance between the inner wall pressing block and the inner wall pressing support block is greater than the distance between the outer wall pressing block and the outer wall pressing support block.

[0038] Furthermore, the inner wall pressing block and the outer wall pressing block are driven by a pressing hydraulic cylinder; the pressing stroke of the pressing hydraulic cylinder is controlled by a linear displacement sensor to achieve precise control of the correction stroke; the pressing pressure of the pressing hydraulic cylinder is controlled by a proportional valve and measured by a pressure sensor to achieve precise control of the correction pressure.

[0039] Furthermore, the bidirectional pressing mechanism is lifted and lowered by a lifting mechanism, and the lifting position is measured by a wire-type displacement sensor, which meets the correction processing of large cylindrical structural parts in the full height range; the angle of the bidirectional pressing mechanism is driven by a motor reducer and a screw pair, which meets the correction processing of large cylindrical structural parts with different cone angles.

[0040] Furthermore, the online detection device includes a measuring element, and the measuring element is a non-contact measurement, and the measurement accuracy will not be affected by contact wear.

[0041] Due to the adoption of the above technical solution, the present invention has the following beneficial effects:

[0042] (1) The present invention realizes the precise detection of the arc outer surface or inner surface of large cylindrical structural parts. The follow-up three-point measurement method is adopted to avoid the measurement error caused by the placement position deviation of large cylindrical structural parts, and the placement position error will not affect the measurement accuracy; the online detection device of the present invention has a small structure and can be installed in a two-way correction device for online automatic measurement, thereby improving the measurement efficiency and reducing the handling of large cylindrical structural parts. The correction processing of large cylindrical structural parts can be completed by lifting them in and out twice.

[0043] (2) The present invention realizes accurate feeding during the measurement and calibration of large cylindrical structural parts. A rotary encoder is used to measure the rotation angle of large cylindrical structural parts, and the feeding position is accurate; the follow-up feeding trolley has the function of a detection platform, which meets the large diameter range of large cylindrical structural parts and avoids the deviation caused by the placement of large cylindrical structural parts during calibration and measurement.

[0044] (3) The present invention realizes bidirectional correction processing of large cylindrical structural parts. The hydraulic bidirectional top pressing technology is adopted to realize bidirectional correction of the circular arc of large cylindrical structural parts in the forward and reverse directions; the correction pressure is digitally controlled by a proportional pressure valve, and the correction amount is digitally controlled by a linear displacement sensor, so as to realize the accurate implementation of the correction process parameters.

[0045] (4) The present invention realizes the automatic adjustment of the correction processing parameters of large cylindrical structural parts. With the support of automated detection technology and the support of the process parameter database, the correction parameters of large cylindrical structural parts are adaptively adjusted; according to the specification parameters and material parameters of large cylindrical structural parts, similar process parameter packages are found from the process parameter database, and the process parameter packages are adjusted according to the values ​​of automatic online detection to form a new process parameter package, thereby realizing the automatic correction of large cylindrical structural parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The present invention will be described in detail below with reference to the accompanying drawings and in combination with examples, and the advantages and implementation methods of the present invention will become more obvious. The contents shown in the accompanying drawings are only used to explain the present invention and do not constitute any limitation to the present invention in any sense. In the accompanying drawings:

[0047] Figure 1 It is a structural schematic diagram of the automatic measurement and correction device for large cylindrical structural parts of the present invention.

[0048] Figure 2 It is a schematic diagram of the principle of the follow-up three-point measurement method of the present invention.

[0049] Figure 3 It is a schematic diagram of the measuring principle of the rotation angle measuring mechanism of the present invention.

[0050] Figure 4 Schematic diagram of the bidirectional correction principle.

[0051] In the figure:

[0052] 1. Large cylindrical structural parts; 2. Online detection device; 3. Feeding trolley; 4. Bidirectional correction device; 5. Rotation angle measurement friction wheel; 6. Rotation angle measurement sensor; 7. Rotation angle measurement follower spring; 8. Rotation angle measurement follower cylinder; 9. Inner wall top pressure support block; 10. Inner wall top pressure block; 11. Outer wall top pressure support block; 12. Outer wall top pressure block; 13. Inner wall top pressure mechanism; 14. Outer wall top pressure mechanism. DETAILED DESCRIPTION

[0053] like Figures 1 to 4 As shown, the present invention provides an automatic measurement and correction method for a large cylindrical structural member, comprising the following steps:

[0054] S1. Online detection of surface shape of large cylindrical structural parts 1:

[0055] Adopt the follow-up three-point measurement method or the height two-point measurement method, calculate and fit the actual digital module value of the surface chord height of the large cylindrical structural part 1, and then compare the actual digital module value with the ideal digital module value to determine whether the arc size of the large cylindrical structural part 1 is qualified. If qualified, enter the next process; if unqualified, this value is used to calculate the process parameters during the correction processing, and the material is sent to the two-way correction device 4 for correction.

[0056] When the large cylindrical structural member 1 is cylindrical, a three-point follow-up measurement method is used for measurement, and the three-point follow-up measurement method includes the following steps:

[0057] S11, using three measuring elements arranged side by side horizontally, with the middle measuring element measuring the zero point as the coordinate origin o, the measuring element measuring the reverse direction as the x direction, and the measuring element measuring the vertical direction as the y direction, to form an xoy plane coordinate system;

[0058] S12. Define the coordinates of the measuring points of the three measuring elements in the xoy plane coordinate system as A , B (Xb, Yb), C (Xc, Yc), whose values ​​can be determined according to the installation position; define the coordinates of the middle point between A and B as D (Xd, Yd), and the coordinates of the middle point between B and C as E (Xe, Ye); define the coordinates of the center point of the large cylindrical structure 1 as O (Xo, Yo);

[0059] S13, obtaining the chord height formed by three measuring points of the large cylindrical structural member 1 and the actual digital modulus value, specifically including:

[0060] Calculate the coordinates of the middle points D and E, respectively D , E((X b +X c ) / 2,(Y b +Y c ) / 2).

[0061] Calculate the coordinates of the center point O of the structural member:

[0062] ;

[0063] ;

[0064] Calculate the measured radius Ro of the large cylindrical structure 1:

[0065] ;

[0066] Calculate the measured chord height Ho of large cylindrical structure 1:

[0067] ).

[0068] When the large cylindrical structural member 1 is a conical cylindrical member, a two-point height measurement method is used for measurement, and the two-point height measurement method includes the following steps:

[0069] S101, obtaining basic data of the bottom radius Ro (standard size) and the semi-cone angle α (standard size) of the conical cylinder of the large cylindrical structure 1;

[0070] S102, calculating the parameters of the current measured height according to the height Hc of the height measuring element, specifically including:

[0071] Calculate the current height standard radius Rx of the large cylindrical structure 1:

[0072] Rx=Ro-Hc tanα;

[0073] Calculate the current standard chord height Hx of the large cylindrical structure 1:

[0074] Hx=Rx-Rx cos( );

[0075] Among them, (Xm, Ym) and (Xn, Yn) are the detection point coordinates of the two measuring elements based on the horizontal plane coordinate system at the Hx detection height.

[0076] S2. Online measurement of the feeding position of the large cylindrical structure 1 to achieve accurate feeding during the calibration process of the large cylindrical structure 1:

[0077] The arc length and angle automatic conversion method is adopted to accurately control the feed amount of the large cylindrical structural part 1; when the follow-up feeding trolley feeds the material, the large cylindrical structural part 1 and the rotation angle measuring mechanism are transmitted through friction, and the rotation angle measuring mechanism measures the rotation arc length of the large cylindrical structural part 1 through a rotary encoder, and converts it into the rotation angle of the large cylindrical structural part 1 through calculation, thereby accurately controlling the feeding rotation angle of the large cylindrical structural part 1.

[0078] S3. Bidirectional correction of large cylindrical structure 1:

[0079] The large cylindrical structural part 1 to be corrected is fed to the corresponding position, and hydraulic bidirectional top pressure is used to realize bidirectional correction of the arc of the large cylindrical structural part 1 in the forward and reverse directions; the correction pressure is digitally controlled by a proportional pressure valve, and the correction amount is digitally controlled by a linear displacement sensor, ultimately realizing accurate implementation of the correction process parameters.

[0080] Among them, with the support of the process parameter database, the correction parameters of the large cylindrical structural part 1 are adaptively adjusted; according to the specification parameters and material parameters of the large cylindrical structural part 1, a similar process parameter package is found from the process parameter database, and the actual digital-analog value obtained in step S1 is transmitted to the process parameter database, and the process parameter package in the process parameter database is adjusted to form a new process parameter package, thereby realizing automatic correction of the large cylindrical structural part 1.

[0081] like Figures 1 to 4 As shown, the present invention also provides an automatic measurement and correction device for large cylindrical structural parts, including an online detection device 2, a rotation angle measurement mechanism and a bidirectional correction device 4.

[0082] The bidirectional correction device 4 includes a bidirectional pressing mechanism, which includes an inner wall pressing mechanism 13 and an outer wall pressing mechanism 14 arranged in opposite directions. An inner wall pressing block 10 and an outer wall pressing block 12 are respectively arranged at the central relative positions of the inner wall pressing mechanism 13 and the outer wall pressing mechanism 14. Inner wall pressing support blocks 9 are symmetrically arranged on both sides of the inner wall pressing block 10, and outer wall pressing support blocks 11 are symmetrically arranged on both sides of the outer wall pressing block 12. The distance between the inner wall pressing block 10 and the inner wall pressing support block 9 is greater than the distance between the outer wall pressing block 12 and the outer wall pressing support block 11.

[0083] The inner wall pressing block 10 and the outer wall pressing block 12 are driven by a pressing hydraulic cylinder, and the maximum pressing force of the pressing hydraulic cylinder is 1100 tons. The pressing stroke of the pressing hydraulic cylinder is controlled by a linear displacement sensor to achieve precise control of the correction stroke. The pressing pressure of the pressing hydraulic cylinder is controlled by a proportional valve and measured by a pressure sensor to achieve precise control of the correction pressure.

[0084] Among them, the bidirectional pressing mechanism can be raised and lowered and the angle can be adjusted.

[0085] In this embodiment, the lifting mechanism (lifting hydraulic cylinder) in the prior art can be used for lifting and lowering of the bidirectional pressing mechanism, and the lifting position is measured by a wire-type displacement sensor to meet the correction processing of the full height range of the large cylindrical structural member 1.

[0086] In this embodiment, the angle of the bidirectional pressing mechanism can be driven by a motor reducer and a lead screw pair, so as to meet the correction processing of large cylindrical structural parts 1 with different cone angles.

[0087] The online detection device 2 and the rotation angle measuring mechanism are both installed on the bidirectional correction device 4 and are located on one side of the outer wall pressing mechanism 14 .

[0088] The online detection device 2 includes a measuring element. The measuring element is a non-contact measurement and will not affect the measurement accuracy due to contact wear.

[0089] The rotation angle measuring mechanism includes a rotation angle measuring friction wheel 5, a rotation angle measuring sensor 6 (rotary encoder), a rotation angle measuring follower spring 7 and a rotation angle measuring follower cylinder 8. The rotating shaft of the rotation angle measuring friction wheel 5 is connected to the output end of the rotation angle measuring follower cylinder 8 through the rotation angle measuring follower spring 7. The rotation angle measuring friction wheel 5 is provided with a rotation angle measuring sensor 6.

[0090] The large cylindrical structural member 1 is moved by a feeding trolley 3. The feeding trolley 3 is a prior art. The structure of the feeding trolley 3 of this embodiment is the same as the conveying mechanism of patent CN119035316A.

[0091] Among them, the large cylindrical structural member 1 is cylindrical or conical. When the large cylindrical structural member 1 is cylindrical, the parameters that can be automatically measured and corrected are: diameter 5.5~10m, height 0.5~3.5m, thickness 24~60mm; when the large cylindrical structural member 1 is conical, the parameters that can be automatically measured and corrected are: diameter 5.6~10m, height 0.6~3.2m, thickness 24~60mm, and semi-cone angle 10~20°.

[0092] The embodiments of the present invention are described in detail above, but the contents are only preferred embodiments of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the present invention.

Claims

1. An automatic measurement and correction method for large cylindrical structural parts, characterized in that: The following steps are involved: S1. Online detection of surface shape of large cylindrical structural parts: Adopt the follow-up three-point measurement method or the height two-point measurement method, calculate and fit the actual digital module value of the surface chord height of the large cylindrical structural part, and then compare the actual digital module value with the set ideal digital module value to determine whether the arc size of the large cylindrical structural part is qualified. If qualified, it will enter the next process; if unqualified, the actual digital module value is used to calculate the process parameters during the correction processing, and the material is sent to the two-way correction device for correction; S2. Feeding during the calibration process of large cylindrical structural parts: The arc length and angle automatic conversion method is adopted to control the feeding amount of large cylindrical structural parts. When the feeding trolley is feeding, the large cylindrical structural parts and the rotation angle measuring mechanism are driven by friction. The rotation angle measuring mechanism measures the rotation arc length of the large cylindrical structural parts through the rotary encoder, and converts it into the rotation angle of the large cylindrical structural parts through calculation, thereby controlling the feeding rotation angle of the large cylindrical structural parts and realizing accurate feeding during the correction process of large cylindrical structural parts. S3. Bidirectional correction of large cylindrical structural parts: The large cylindrical structural parts to be corrected are fed to the bidirectional correction device, and hydraulic bidirectional top pressure is used to realize the bidirectional correction of the large cylindrical structural parts in the forward and reverse directions. The correction pressure is controlled by a proportional pressure valve, and the correction amount is controlled by a linear displacement sensor, so as to finally realize the accurate implementation of the correction process parameters and complete the automatic measurement and correction of the large cylindrical structural parts. In step S1, when the large cylindrical structural member is cylindrical, a follow-up three-point measurement method is used for measurement, and the follow-up three-point measurement method includes the following steps: S11, using three measuring elements arranged side by side horizontally, with the middle measuring element measuring the zero point as the coordinate origin o, the measuring element measuring the reverse direction as the x direction, and the measuring element measuring the vertical direction as the y direction, to form an xoy plane coordinate system; S12. Define the coordinates of the measuring points of the three measuring elements in the xoy plane coordinate system as A , B (Xb, Yb), C (Xc, Yc), whose values ​​can be determined according to the installation position; define the coordinates of the middle point between A and B as D (Xd, Yd), and the coordinates of the middle point between B and C as E (Xe, Ye); define the coordinates of the center point of the large cylindrical structure O (Xo, Yo); S13. Obtain the chord height formed by three measuring points of a large cylindrical structural member and the actual digital modulus value, including: Calculate the coordinates of the middle points D and E, respectively D , E((X b +X c ) / 2,(Y b +Y c ) / 2); Calculate the coordinates of the center point O of the structural member: ； ； Calculate the measured radius Ro of large cylindrical structural parts: ； Calculate the measured chord height Ho of large cylindrical structural members: ； In step S1, when the large cylindrical structural member is a conical cylindrical member, a two-point height measurement method is used for measurement, and the two-point height measurement method includes the following steps: S101, obtaining basic data of the bottom radius Ro and the semi-cone angle α of the tapered cylinder of a large cylindrical structural member; S102, calculating the parameters of the current measured height according to the height Hc of the height measuring element, specifically including: Calculate the current height standard radius Rx of large cylindrical structural parts: Rx=Ro-Hc tanα; Calculate the current standard chord height Hx of large cylindrical structural members: Hx=Rx-Rx cos( ); Among them, M (Xm, Ym) and N (Xn, Yn) are the detection point coordinates of the two measuring elements based on the horizontal plane coordinate system at the Hx detection height.

2. The automatic measurement and correction method for large cylindrical structural parts according to claim 1 is characterized in that: The actual digital-to-analog value obtained in step S1 is transmitted to the process parameter database, and the process parameter package in the process parameter database is adjusted to form a new process parameter package, thereby realizing automatic correction of the large cylindrical structural member.

3. An automatic measurement and correction device for a large cylindrical structure, used to implement the automatic measurement and correction method for a large cylindrical structure as claimed in any one of claims 1 or 2, characterized in that: It includes an online detection device, a rotation angle measuring mechanism and a bidirectional correction device, wherein the bidirectional correction device includes a bidirectional pressing mechanism, and the bidirectional pressing mechanism includes an inner wall pressing mechanism and an outer wall pressing mechanism arranged opposite to each other; the online detection device and the rotation angle measuring mechanism are both installed on the bidirectional correction device and are located on one side of the outer wall pressing mechanism; the rotation angle measuring mechanism includes a rotation angle measuring friction wheel, a rotation angle measuring sensor, a rotation angle measuring follower spring and a rotation angle measuring follower cylinder, the rotating shaft of the rotation angle measuring friction wheel is connected to the output end of the rotation angle measuring follower cylinder through a rotation angle measuring follower spring, and the rotation angle measuring friction wheel is provided with a rotation angle measuring sensor.

4. The automatic measurement and correction device for large cylindrical structural parts according to claim 3 is characterized in that: An inner wall pressing block and an outer wall pressing block are respectively arranged at the central relative positions of the inner wall pressing mechanism and the outer wall pressing mechanism, inner wall pressing support blocks are symmetrically arranged on both sides of the inner wall pressing block, and outer wall pressing support blocks are symmetrically arranged on both sides of the outer wall pressing block, and the distance between the inner wall pressing block and the inner wall pressing support block is greater than the distance between the outer wall pressing block and the outer wall pressing support block.

5. The automatic measurement and correction device for large cylindrical structural parts according to claim 4 is characterized in that: The inner wall pressing block and the outer wall pressing block are driven by a pressing hydraulic cylinder; the pressing stroke of the pressing hydraulic cylinder is controlled by a linear displacement sensor; the pressing pressure of the pressing hydraulic cylinder is controlled by a proportional valve and measured by a pressure sensor.

6. The automatic measurement and correction device for large cylindrical structural parts according to claim 3 is characterized in that: The bidirectional pressing mechanism is lifted and lowered by a lifting mechanism, and the lifting position is measured by a wire-drawing displacement sensor; the angle of the bidirectional pressing mechanism is driven by a motor reducer and a lead screw pair.

7. The automatic measurement and correction device for large cylindrical structural parts according to claim 3 is characterized in that: The online detection device comprises a measuring element, and the measuring element is a non-contact measurement.

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