High-precision cutting device for large-diameter high-strength steel cylinder structure

Abstract

The invention relates to a high-precision cutting device for a large-diameter high-strength steel cylinder structure, and belongs to the field of numerical control profiling machining of large cylinder structures. The device comprises a driving unit, a tool bit, a measurement profiling unit and a numerical control unit, the driving unit is used for driving the tool bit to perform six-degree-of-freedom motion so as to cut a workpiece; the measurement profiling unit is used for measuring the surface of the workpiece to obtain the actual shape of the surface of the workpiece; the numerical control unit is used for generating a tool bit machining path according to the obtained actual morphology of the workpiece surface. According to the invention, six-degree-of-freedom multi-axis movement of the tool bit can be realized. The numerical control unit generates a self-adaptive machining path through a trajectory planning and compensation algorithm, dynamic trajectory correction is achieved through the multi-axis linkage control module, the method can adapt to the situation of workpiece field deformation, adjustment flexibility is good, field machining efficiency and adaptability are remarkably improved, and machining precision is improved. And meanwhile, the problem of insufficient cutting precision caused by ovality and local deformation of a large-diameter cylinder is solved.

Description

Technical Field

[0001] This invention relates to a high-precision cutting device for large-diameter, high-strength steel cylindrical structures, belonging to the field of CNC contour machining of large cylindrical structures. Background Technology

[0002] In fields such as nuclear power, chemical engineering, and shipbuilding, it is often necessary to cut intersecting holes in large cylindrical shells (such as pressure vessels and pipelines). Therefore, appropriate equipment is required for this cutting. Existing technologies have the following shortcomings:

[0003] 1. Traditional contouring devices: For example, patent application number CN202111461780.6 discloses a contouring processing device, which includes a contouring device, a transmission device, and a flame cutting device. Contouring wheels on the contouring track move along the contouring track, and a motor drives a gearbox to achieve constant speed movement to meet the cutting speed requirements. The cutting path of the flame nozzle is synchronized with the contouring track through the contouring track, thereby achieving hole cutting, etc. However, this technology relies on physical templates to make the contouring track, which cannot adapt to the deformation of the workpiece on site and has poor adjustment flexibility.

[0004] 2. Fixed CNC machine tools: such as the Boda CNC moving column pipe cutting machine (BDXG1-6312-P), although it supports 5-axis linkage, it has a large structure, cannot be installed on site, and lacks real-time shape compensation function.

[0005] 3. General intersecting line cutting machine: such as the DKK-2 flame cutting machine of Harbin Engineering University, which only supports basic orthogonal hole cutting, has insufficient multi-degree-of-freedom adjustment capability, and limited bevel accuracy. Summary of the Invention

[0006] To address this problem, the present invention proposes a high-precision cutting device for a large-diameter, high-strength steel cylindrical structure.

[0007] The technical solution adopted by the present invention to solve the above problems is as follows: a high-precision cutting device for a large-diameter, high-strength steel cylindrical structure includes a drive unit, a cutting head, a measurement and contouring unit, and a CNC unit; the drive unit is connected to the cutting head and is used to drive the cutting head to perform six-degree-of-freedom motion to cut the workpiece; the measurement and contouring unit is used to measure the surface of the workpiece to obtain the actual shape of the workpiece surface; the CNC unit is used to generate a cutting head machining path based on the obtained actual shape of the workpiece surface and control the movement of the drive unit so that the cutting head cuts the workpiece according to the cutting head machining path.

[0008] Furthermore, the driving unit includes a C-axis motion driving mechanism, an X-axis motion driving mechanism, and a Z-axis motion driving mechanism; the C-axis motion driving mechanism is used to drive the cutter head to rotate around the workpiece axis in a C-axis manner; the X-axis motion driving mechanism is used to drive the cutter head to move along the workpiece radial direction in an X-axis manner; and the Z-axis motion driving mechanism is used to drive the cutter head to move along the workpiece axial direction in a Z-axis manner.

[0009] Furthermore, the drive unit includes a power head; the power head includes a turntable, a swing frame, a base, an A-axis motion drive mechanism, and a B-axis motion drive mechanism; the base is fixedly connected to the turntable; the swing frame is rotatably connected to the base; the A-axis motion drive mechanism is used to drive the turntable to rotate around the A-axis; the B-axis motion drive mechanism is used to drive the swing frame to pitch around the B-axis; the C-axis motion drive mechanism, the X-axis motion drive mechanism, and the Z-axis motion drive mechanism are all used to drive the turntable to move.

[0010] Furthermore, the drive unit includes an electric spindle; the electric spindle is fixedly connected to the swing frame; the cutter head is fixedly connected to the output shaft of the electric spindle; the electric spindle is used to drive the cutter head to rotate around the S-axis for cutting.

[0011] Furthermore, the present invention also includes an annular bracket, an annular support plate, an annular rotating disk, a crossbeam, a transverse slide plate, and a column; the annular support plate is coaxially fixed to the upper end of the annular bracket; the annular rotating disk is rotatably connected to the annular support plate; the C-axis motion drive mechanism includes a rotary motor and a gear transmission mechanism both mounted on the annular bracket; the annular rotating disk is connected to the gear transmission mechanism; the rotary motor is used to drive the annular rotating disk to rotate around the workpiece axis via the gear transmission mechanism; the crossbeam is fixed to the annular rotating disk; the transverse slide plate is slidably connected to the crossbeam. The X-axis motion drive mechanism includes a first motor and a first ball screw, both mounted on the crossbeam; the first motor drives the transverse slide to move radially along the workpiece along the X-axis via the first ball screw; the column is slidably connected to the transverse slide; the Z-axis motion drive mechanism includes a second motor and a second ball screw, both mounted on the column; the second motor drives the column to move axially along the workpiece along the Z-axis via the second ball screw; the turntable is rotatably connected to the bottom of the column; the measuring and contouring unit is mounted on the cutting head; the CNC unit is mounted on the annular support.

[0012] Furthermore, the present invention also includes an electromagnetic adsorption mechanism; the electromagnetic adsorption mechanism is fixed on the annular support and is used to adsorb and fix the annular support onto the workpiece.

[0013] Furthermore, the CNC unit includes a trajectory planning and compensation module and a multi-axis linkage control module; the trajectory planning and compensation module is used to fit the actual surface morphology of the workpiece with the theoretical model of the surface morphology of the workpiece to generate a cutting tool machining path; the multi-axis linkage control module is used to control the movement of the drive unit so that the cutting tool cuts the workpiece according to the cutting tool machining path.

[0014] The beneficial effects of this invention are: It achieves six degrees of freedom motion of the cutting head, i.e., multi-axis linkage, through a drive unit, a measurement and contouring unit, and a CNC unit. The CNC unit generates an adaptive machining path through trajectory planning and compensation algorithms, and realizes dynamic trajectory correction through the multi-axis linkage control module. This allows it to adapt to workpiece deformation on-site, offering good adjustment flexibility and solving the problem of insufficient cutting accuracy for large-diameter cylinders caused by ellipticity and local deformation. This invention can complete high-precision beveling cutting of large-diameter, high-strength steel cylindrical structures, significantly improving on-site machining efficiency and adaptability, with a single-cycle machining efficiency increase of over 50% (including debugging time ≤ 48 hours). Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the high-precision cutting device for a large-diameter, high-strength steel cylinder structure provided by the present invention; Figure 2 yes Figure 1 Structural diagram of the central beam and column section; Figure 3 yes Figure 1 Schematic diagram of the power head structure; Figure 4 This is a flowchart of the processing of a high-precision cutting device for a large-diameter, high-strength steel cylindrical structure provided by the present invention.

[0016] Figure label: 1-C-axis motion drive mechanism; 2-X-axis motion drive mechanism; 3-Z-axis motion drive mechanism; 4-A-axis motion drive mechanism; 5-B-axis motion drive mechanism; 6-Electromagnetic adsorption mechanism; 7-Turntable; 8-Swing frame; 9-Base; 10-Crossbeam; 11-Transverse slide plate; 12-Column. Detailed Implementation

[0017] The embodiments of this application will now be described in detail with reference to the figures, including one or more examples of embodiments of this application. Each example is provided for the purpose of explaining this application and not for limiting it. In fact, those skilled in the art will appreciate that various modifications and variations can be made to this application without departing from the scope or spirit of this application. For example, a feature illustrated or described as part of one embodiment may be used with another embodiment to produce yet another embodiment. Therefore, it is intended that this application cover such modifications and variations, which are within the scope of the appended claims and their equivalents. As used in this specification, the terms “first,” “second,” etc., are used interchangeably to distinguish one component from another and are not intended to indicate the location or importance of the components. As used in this specification, unless the context clearly indicates otherwise, the terms “a,” “an,” “the,” and “the” are intended to indicate the presence of one or more elements. The terms “comprising,” “including,” and “having” are intended to be inclusive and mean that there may be other elements in addition to those listed.

[0018] Referring now to the accompanying drawings, in which the same numbers in all the drawings denote the same elements, the present invention will be further explained and described below in conjunction with specific embodiments.

[0019] like Figures 1 to 3 As shown, the high-precision cutting device for large-diameter, high-strength steel cylindrical structures provided by the present invention includes a drive unit, a cutting head, a measurement and contouring unit, and a CNC unit. The drive unit is connected to the cutting head and is used to drive the cutting head to perform six-degree-of-freedom motion to cut the workpiece. The measurement and contouring unit is used to measure the surface of the workpiece and obtain the actual shape of the workpiece surface. The CNC unit is used to generate a cutting head machining path based on the obtained actual shape of the workpiece surface and control the drive unit to move so that the cutting head cuts the workpiece according to the cutting head machining path.

[0020] This invention acquires the actual shape data of the workpiece through a measurement and contouring unit, and the CNC unit generates an adaptive machining path (tool head machining path). Finally, the tool head cuts according to the machining path to complete the bevel cutting. Simultaneously, the tool head can perform six degrees of freedom of motion, allowing the invention to adapt to workpiece deformation on-site, providing good adjustment flexibility, significantly improving on-site machining efficiency and adaptability, and solving the problem of insufficient cutting accuracy for large-diameter cylinders due to ellipticity and local deformation.

[0021] In this invention, the X-axis refers to the radial direction of the cylinder (workpiece), the Z-axis refers to the axial direction of the cylinder, the C-axis refers to the rotation axis around the Z-axis, the A-axis refers to the rotation axis of the turntable, the B-axis refers to the rotation axis (or swing axis) of the swing frame for pitching and oscillating, and the S-axis refers to the rotation axis that drives the cutting head to rotate for cutting.

[0022] The drive unit includes a C-axis motion drive mechanism 1, an X-axis motion drive mechanism 2, and a Z-axis motion drive mechanism 3. The C-axis motion drive mechanism 1 drives the cutter head to rotate around the workpiece axis (C-axis). The X-axis motion drive mechanism 2 drives the cutter head to move radially along the workpiece (X-axis). The Z-axis motion drive mechanism 3 drives the cutter head to move axially along the workpiece (Z-axis). The drive unit also includes a power head; the power head includes a turntable 7, a swing frame 8, a base 9, an A-axis motion drive mechanism 4, and a B-axis motion drive mechanism 5. The base 9 is fixedly connected to the turntable 7; the swing frame 8 is rotatably connected to the base 9. The A-axis motion drive mechanism 4 drives the turntable 7 to rotate around the A-axis; the B-axis motion drive mechanism 5 drives the swing frame 8 to pitch around the B-axis; the C-axis motion drive mechanism 1, X-axis motion drive mechanism 2, and Z-axis motion drive mechanism 3 all drive the turntable 7. The drive unit also includes an electric spindle; the electric spindle is fixedly connected to the swing frame 8; the cutter head is fixedly connected to the output shaft of the electric spindle; the electric spindle drives the cutter head to rotate and cut around the S-axis.

[0023] In practical applications, a three-axis power head can be used. Preferably, the cutting parameters are: electric spindle speed of 4000 rpm, and feed rate continuously adjustable from 0 to 1800 mm / min according to the arc length.

[0024] The cutter head achieves six degrees of freedom (C-axis, X-axis, Z-axis, A-axis, B-axis, and S-axis) motion via C-axis motion drive mechanism 1, X-axis motion drive mechanism 2, Z-axis motion drive mechanism 3, A-axis motion drive mechanism 4, B-axis motion drive mechanism 5, and an electric spindle. C-axis motion drive mechanism 1, X-axis motion drive mechanism 2, and Z-axis motion drive mechanism 3 can quickly adjust the cutter head position, while A-axis motion drive mechanism 4 and B-axis motion drive mechanism 5 can adjust the cutter head's vertical orientation towards the cutting position. The electric spindle drives the cutter head to perform rotary cutting.

[0025] The C-axis motion drive mechanism 1 can have various structural forms. For example, the C-axis motion drive mechanism 1 includes a servo motor, a transmission gear, and a turntable; the transmission gear is coaxially fixed to the power output shaft of the servo motor, and the turntable is coaxially fixed to the transmission gear. The servo motor drives the turntable to rotate around the power output shaft through the transmission gear, and the cutter head rotates around the axis of the turntable 7. The C-axis motion drive mechanism 1 can also achieve rotational motion through belt drive or chain drive, etc. Preferably, the high-precision cutting device with a large-diameter high-strength steel cylindrical structure provided by the present invention includes an annular bracket, an annular support plate, an annular rotating plate, a crossbeam 10, a transverse slide plate 11, and a column 12; the annular support plate is coaxially fixed to the upper end of the annular bracket; the annular rotating plate is rotatably connected to the annular support plate; the C-axis motion drive mechanism 1 includes a rotary motor and a gear transmission mechanism both mounted on the annular bracket; the annular rotating plate is connected to the gear transmission mechanism; the rotary motor is used to drive the annular rotating plate to rotate around the workpiece axis via the gear transmission mechanism. The gear transmission mechanism can be any gear mechanism in the prior art that can achieve rotational motion transmission.

[0026] The X-axis motion drive mechanism 2 can be a servo motor, a ball screw pair, and a slide plate. The servo motor drives the slide plate to move along a linear guide rail through the ball screw pair, thereby driving the cutter head to perform linear motion. It can also be a gear and rack structure, or a cylinder directly driven to perform linear motion, etc. Preferably, in this invention, the crossbeam 10 is fixed to the annular rotary disk; the transverse slide 11 is slidably connected to the crossbeam 10; the X-axis motion drive mechanism 2 includes a first motor and a first ball screw, both mounted on the crossbeam 10; the first motor drives the transverse slide 11 to move along the workpiece radially in the X-axis direction through the first ball screw.

[0027] The structure of the Z-axis motion drive mechanism 3 is the same as that of the X-axis motion drive mechanism 2 described above. Preferably, in this invention, the column 12 is slidably connected to the transverse slide plate 11; the Z-axis motion drive mechanism 3 includes a second motor and a second ball screw, both mounted on the column 12; the second motor drives the column 12 to move along the Z-axis along the workpiece axis via the second ball screw; the turntable 7 is rotatably connected to the bottom of the column 12; the measuring and contouring unit is mounted on the tool head; and the CNC unit is mounted on the ring bracket.

[0028] The A-axis motion drive mechanism 4 includes a servo motor and a turbine housing. The servo motor drives the turntable 7 to rotate around the A-axis through the turbine housing. The A-axis motion drive mechanism 4 can also adopt existing structures that can achieve rotary drive, such as belt drive or chain drive.

[0029] The B-axis motion drive mechanism 5 includes a servo motor and a gear transmission mechanism. The servo motor drives the swing frame 8 to pitch and swing around the B-axis through the gear transmission mechanism. The B-axis motion drive mechanism 5 can also adopt a drive structure that can realize pitch and swing in the prior art, such as a cylinder or a cam.

[0030] Furthermore, the measurement and contouring unit includes a contact sensor, which is detachably mounted on the cutting head for workpiece measurement and contouring. During use, the contact sensor is fixedly mounted on the cutting head; when not in use, it is removed. Suitable detachable mounting methods under existing technology can be used, such as clamping locking, snap-fit, or plug-in detachable mounting methods. During workpiece measurement and contouring, the C-axis motion drive mechanism is activated, and the contact sensor performs dense indexing point acquisition, measuring the distance of the indexing points relative to the origin of the cutting device. A point matrix fitting algorithm is then used to achieve workpiece measurement and contouring (obtaining the actual surface morphology of the workpiece).

[0031] A laser pointer is preferably mounted on the C-axis motion drive mechanism for coarse positioning of the cutting device relative to the workpiece during hoisting. The laser pointer's mounting position on the C-axis motion drive mechanism is adjustable, employing suitable adjustable mounting methods available in the prior art. For example, it can be mounted using a sliding fit with a fastening structure (such as fastening bolts or set screws), allowing adjustment of the laser pointer's fixed mounting position within its stroke range. After the laser pointer is adjusted and locked in place on the C-axis motion drive mechanism, during hoisting of the cutting device, the positioning function between the cutting device and the workpiece is achieved by aligning the laser spot emitted by the laser pointer with the center punch or crosshair position on the workpiece.

[0032] The present invention also includes an electromagnetic adsorption mechanism 6; the electromagnetic adsorption mechanism 6 is fixed on the annular support and is used to adsorb and fix the annular support onto the workpiece. Preferably, there are multiple electromagnetic adsorption mechanisms 6, which are evenly spaced along the circumference of the annular support at the bottom of the annular support, which can improve the stability of the cutting device. By fixing the entire device to the workpiece through magnetic adsorption technology, it is possible to avoid shaking of the device during cutting, reduce the need for workpiece displacement, and the fixing method is simple and easy to operate.

[0033] The CNC unit includes a trajectory planning and compensation module and a multi-axis linkage control module. The trajectory planning and compensation module is used to fit the actual surface morphology of the workpiece with a theoretical model of the workpiece surface morphology to generate the cutting path of the tool head. The multi-axis linkage control module is used to control the motion of the drive unit so that the tool head cuts the workpiece according to the cutting path. Preferably, the multi-axis linkage control module calculates motion data based on inverse kinematics and dynamically compensates for errors through a feedforward-feedback mechanism. Specifically, motion data is fed back in real time to construct a six-degree-of-freedom error quantity and generate a real-time adjustment compensation quantity to achieve dynamic error compensation.

[0034] The CNC unit also includes a user operation layer, a core control layer, and a function processing layer. The user operation layer includes a touchscreen display, parameter setting panel, real-time status monitoring, and alarm information display, forming the human-machine interface. The core control layer includes a main controller (PLC / industrial computer), motion control module, data management module, and safety monitoring module. The main controller has an external device interface. The safety monitoring module includes an emergency stop button, limit switches, overload protection, and temperature monitoring, forming a safety protection system. The function processing layer includes a trajectory planning and compensation module, a multi-axis linkage control module, a measurement data processing module (i.e., a measurement contouring module), and a G-code generation and parsing module.

[0035] Specifically, the measurement and contouring unit measures the workpiece surface to construct a shape model (i.e., the actual shape of the workpiece surface). The trajectory planning and compensation module compares the imported theoretical model with the actual shape, performs error analysis, and generates a compensated machining trajectory (tool head machining path). Then, the G-code generation and parsing module automatically generates G-code. The multi-axis linkage control module controls the drive unit to perform multi-axis linkage machining. Simultaneously, the tool head position is fed back in real time (which can be achieved through existing measuring instruments such as sensors) to determine whether the accuracy meets the standard. If it does, the machining is completed. If it does not meet the standard, dynamic trajectory correction is performed, and the multi-axis linkage control module adjusts the tool head position in real time.

[0036] The specific implementation method for beveling is as follows: 1. Installation and fixing: Use a laser pointer for hoisting and positioning (error ≤ 2mm), and fix the device to the outer wall of the cylinder through the electromagnetic adsorption mechanism 6; 2. Shape Acquisition: The workpiece surface is measured using a contour measurement unit (contact sensor) to obtain the actual shape data of the workpiece's outer surface; 3. Trajectory Generation: The CNC unit fits the measured actual shape data with the theoretical model to generate the tool head machining path; 4. Multi-axis beveling: The C-axis drives the power head to rotate, and the X / Z axes adjust the tool center position; A / B axis linkage control allows the tool axis to be perpendicular to the bevel surface, completing variable angle bevel milling; Its cutting parameters are: spindle speed 4000 rpm, and feed rate steplessly adjustable from 0 to 1800 mm / min according to the arc length.

[0037] The specific processing flow is as follows Figure 4 As shown.

[0038] In summary, the high-precision cutting device for large-diameter, high-strength steel cylinders provided by this invention, through a drive unit, a measurement and contouring unit, and a CNC unit, can achieve six degrees of freedom motion of the cutting head (five-axis linkage of C-axis, X-axis, Z-axis, A-axis, and B-axis, and S-axis rotary cutting), thereby realizing multi-axis linkage. The CNC unit generates adaptive machining paths through trajectory planning and compensation algorithms, solving the problem of insufficient cutting accuracy of large-diameter cylinders due to ellipticity and local deformation. This invention can complete beveling cutting, significantly improving on-site processing efficiency and adaptability, with a single-cycle processing efficiency increase of over 50% (including debugging time ≤ 48 hours).

[0039] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent substitutions, and improvements made to the above embodiments without departing from the scope of the present invention, based on the technical essence of the present invention, and within the spirit and principles of the present invention, shall still fall within the protection scope of the present invention.

Claims

1. A high-precision cutting device for a large-diameter, high-strength steel cylindrical structure, characterized in that, Includes a drive unit, a tool head, a measurement and profiling unit, and a CNC unit; The drive unit is connected to the cutter head and is used to drive the cutter head to perform six degrees of freedom motion to cut the workpiece; The measurement and contouring unit is used to measure the surface of the workpiece and obtain the actual shape of the workpiece surface; The CNC unit is used to generate a cutting path based on the actual surface morphology of the workpiece and control the movement of the drive unit so that the cutting head cuts the workpiece according to the cutting path.

2. The high-precision cutting device for large-diameter, high-strength steel cylindrical structures according to claim 1, characterized in that, The drive unit includes a C-axis motion drive mechanism, an X-axis motion drive mechanism, and a Z-axis motion drive mechanism; The C-axis motion drive mechanism is used to drive the cutter head to rotate around the workpiece axis in a C-axis manner; The X-axis motion drive mechanism is used to drive the cutter head to move along the X-axis radially of the workpiece. The Z-axis motion drive mechanism is used to drive the cutter head to move along the Z-axis along the workpiece axis.

3. The high-precision cutting device for large-diameter, high-strength steel cylindrical structures according to claim 2, characterized in that, The drive unit includes a power head; The power head includes a turntable, a swing frame, a base, an A-axis motion drive mechanism, and a B-axis motion drive mechanism; The base is fixedly connected to the turntable; the swing frame is rotatably connected to the base; The A-axis motion drive mechanism is used to drive the turntable to rotate around the A-axis; The B-axis motion drive mechanism is used to drive the swing frame to pitch and swing around the B-axis. The C-axis motion drive mechanism, the X-axis motion drive mechanism, and the Z-axis motion drive mechanism are all used to drive the turntable to move.

4. The high-precision cutting device for large-diameter, high-strength steel cylindrical structures according to claim 3, characterized in that, The drive unit includes an electric spindle; The electric spindle is fixedly connected to the swing frame; The cutting head is fixedly connected to the output shaft of the electric spindle; The electric spindle is used to drive the cutting head to rotate around the S-axis for cutting.

5. The high-precision cutting device for large-diameter, high-strength steel cylindrical structures according to claim 4, characterized in that, It also includes a ring bracket, a ring support plate, a ring rotating plate, a crossbeam, a transverse slide plate, and a column; The annular support disk is coaxially fixed to the upper end of the annular bracket; the annular rotating disk is rotatably connected to the annular support disk; The C-axis motion drive mechanism includes a rotary motor and a gear transmission mechanism both mounted on the annular bracket; the annular rotating disk is connected to the gear transmission mechanism; the rotary motor is used to drive the annular rotating disk to rotate around the workpiece axis via the gear transmission mechanism. The crossbeam is fixed to the annular rotating disk; the transverse sliding plate is slidably connected to the crossbeam. The X-axis motion drive mechanism includes a first motor and a first ball screw, both mounted on the crossbeam; the first motor drives the transverse slide to move along the X-axis of the workpiece radially via the first ball screw. The column is slidably connected to the horizontal sliding plate; The Z-axis motion drive mechanism includes a second motor and a second ball screw, both mounted on the column; the second motor drives the column to move along the workpiece axis via the second ball screw. The turntable is rotatably connected to the bottom of the column; The measurement and contouring unit is mounted on the cutting head; The numerical control unit is mounted on the annular support.

6. The high-precision cutting device for large-diameter, high-strength steel cylindrical structures according to claim 5, characterized in that, It also includes an electromagnetic adsorption mechanism; The electromagnetic adsorption mechanism is fixed on the annular support and is used to adsorb and fix the annular support onto the workpiece.

7. The high-precision cutting device for large-diameter, high-strength steel cylindrical structures according to claim 1, characterized in that, The numerical control unit includes a trajectory planning and compensation module and a multi-axis linkage control module; The trajectory planning and compensation module is used to fit the actual surface morphology of the workpiece with the theoretical model of the surface morphology of the workpiece to generate the tool head machining path; The multi-axis linkage control module is used to control the movement of the drive unit so that the cutter head cuts the workpiece according to the cutter head processing path.

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