Automatic groove processing device for repairing cladding welds of stabilizer casing penetrations

Abstract

This invention discloses an automatic beveling device for repairing surfacing welds on pressurizer bushings, belonging to the technical field of nuclear power plant nuclear island maintenance equipment. The automatic beveling device includes a mechanical body comprising a clamping assembly, a rotating platform, a radial movement mechanism, an axial feed mechanism, a cutting head assembly, and a monitoring assembly. The automatic beveling device provided by this invention processes the surfacing weld into a spatial elliptical J-shaped bevel, laying the structural foundation for subsequent welding. It addresses the need for automatic beveling when repairing the bottom bushing of the pressurizer lower head using a cutting and surfacing welding method on-site. It provides an important automatic beveling function for on-site repair of the sealing weld of the pressurizer bushing, while also enabling remote control and monitoring, reducing the impact of personnel radiation dose.

Description

Technical Field

[0001] This invention relates to the field of nuclear power plant nuclear island maintenance equipment technology, specifically to an automatic beveling device for repairing weld seams of pressurizer bushing through-parts, and more particularly to an automatic beveling device for repairing weld seams of pressurizer bushing through-parts in nuclear power plants. Background Art

[0002] The pressurizer bushing penetration is classified as a Class I nuclear safety, Class I quality, and Class I seismic resistance device. The sealing weld at the connection between the bottom electric heating element bushing and the lower end cap of the pressurizer is most susceptible to PWSCC corrosion and leakage in the primary circuit due to operating at temperatures above 300°C and under residual welding and working stresses. Although third-generation nuclear power plants employ more advanced technologies, the possibility of leakage due to PWSCC corrosion at this sealing weld cannot be ruled out. In the event of such a common fault, repair of the bushing penetration is necessary. One repair process involves cutting and welding. This involves cutting the original sealing weld and then using overlay welding to create a corrosion-resistant nickel-based alloy weld overlay near the original connection. After welding, a bevel is pre-formed on the weld overlay, and the replacement pressurizer bushing is then welded to it to form a new sealing boundary, thus replacing the bushing penetration. This method requires beveling at the weld seam during repair to prepare for subsequent welding, such as... Figure 1 As shown.

[0003] Because the lower end cap of the voltage regulator has a spherical structure, its connection with the bushing penetration forms a three-dimensional J-shaped spatial elliptical curve. During the repair of the voltage regulator bushing penetration by welding, a nickel-based alloy weld overlay layer needs to be welded at the original connection, and a bevel needs to be prefabricated. To ensure the smooth progress of subsequent welding, the pipe end needs to be machined into a J-shaped bevel after the weld overlay is completed. The machining trajectory is close to a spatial elliptical curve, which needs to be fitted by a multi-axis linkage method. Since the bottom of the bushing penetration is in a narrow, highly radioactive space, manual operation is difficult; and the bushing components are densely arranged, with a minimum spacing of 110mm between adjacent bushings, resulting in complex interferences, and the bushings must not be damaged during processing; in addition, the weld overlay is composed of a nickel-based alloy weld overlay layer, which has high hardness, requiring high hardness of the cutting tools and stability of the equipment; finally, due to different welding processes, the width of the bevel to be processed varies, requiring the equipment to have an adjustment function in the radial direction.

[0004] These characteristics dictate that the developed automatic beveling device must possess functions such as remote control, long-distance monitoring, automatic J-shaped beveling, automatic fitting of spatial elliptical trajectories, and debris collection. It must also have radial adjustment capabilities to adapt to beveling requirements of different widths. Furthermore, it must operate in confined and complex spaces without interfering with adjacent bushings. Additionally, the device must be lightweight, easy to install and disassemble, quick to use, and highly stable. Therefore, it is necessary to design and develop a dedicated automatic beveling device to perform beveling of weld seams for the repair of through-hole components of voltage regulator bushings. Summary of the Invention

[0005] To address the processing requirements of elliptical J-shaped weld bevels for the surfacing welds of the bottom bushing penetration of a voltage regulator, this invention aims to provide an automatic bevel processing device for the repair of surfacing welds in voltage regulator bushing penetrations. This device features remote operation, remote monitoring, automatic J-shaped bevel processing, automatic fitting of spatial elliptical trajectories, and debris collection. It can operate stably in a radioactive environment of 5 msv / h, achieving automatic bevel processing and remote monitoring of surfacing welds in a radioactive environment. This provides important pre-process equipment for the repair of voltage regulator bushing penetrations and a convenient tool for the automatic bevel processing of similar welds, especially J-shaped welds.

[0006] The technical solution of the present invention to solve the above-mentioned technical problems is as follows:

[0007] This invention provides an automatic beveling device for repairing weld overlays on voltage regulator bushings, comprising: a mechanical body, the mechanical body including:

[0008] A clamping assembly is used to assemble with the through-hole sleeve to be processed in order to achieve the installation, fixation and centering of the mechanical body;

[0009] A rotating platform, which is mounted on the clamping assembly, is used to drive the mechanical body to rotate.

[0010] A radial moving mechanism is mounted on the rotating platform and is used to drive the mechanical body to move radially.

[0011] An axial feed mechanism is provided, wherein the radial moving mechanism is installed within the rotary platform, and the axial feed mechanism is used to drive the mechanical body to move axially.

[0012] The rotary platform cooperates with the axial feed mechanism to achieve automatic fitting of a spatial elliptical trajectory; the cutting head assembly is mounted on the radial moving mechanism and is used to perform J-shaped beveling of the sleeve through-piece to be processed;

[0013] A monitoring component is mounted on the clamping component and is used to monitor the beveling process conditions.

[0014] Furthermore, in the aforementioned automatic beveling device for repairing weld seams of voltage regulator bushing through-parts, the clamping assembly includes: a machine body shell and a chuck, with a plurality of mounting brackets adapted to the chuck evenly arranged on the outer side of the machine body shell, and the chuck mounted on the mounting brackets.

[0015] Furthermore, in the aforementioned automatic beveling device for repairing weld seams of voltage regulator bushing penetrations, the mounting bracket is semi-cylindrical, and the chuck is C-shaped.

[0016] Furthermore, in the aforementioned automatic beveling device for repairing weld seams of voltage regulator bushing through-hole components, the rotating platform includes: an inner cylinder, bearings, a worm gear, a servo motor, and a worm wheel;

[0017] The bearings are respectively installed at both ends of the outer side of the inner cylinder. The bearings cooperate with the clamping assembly. The worm gear is installed at the bottom of the inner cylinder. The output end of the servo motor is connected to the worm, and the worm meshes with the worm gear.

[0018] Furthermore, in the aforementioned automatic beveling device for repairing weld seams of voltage regulator bushing through-hole components, the rotating platform further includes an upper fixing plate, which is installed at the top of the inner cylinder.

[0019] Furthermore, in the aforementioned automatic beveling device for repairing the weld overlay of a voltage regulator bushing through-piece, the radial movement mechanism includes: a spindle fixing frame and a radial guide rail.

[0020] The radial guide rail is located at the top of the rotary platform, and the spindle fixing bracket is mounted on the radial guide rail. The radial guide rail is controlled by a motor to process bevels of different diameters.

[0021] Furthermore, in the aforementioned automatic beveling device for repairing the weld overlay of a voltage regulator bushing through-hole component, the axial feed mechanism includes: a spindle support frame, a lifting guide rail, a lifting feed motor, a lead screw connector, a ball screw, and a lead screw seat.

[0022] The main spindle support frame is installed inside the rotating platform, the lifting guide rail is installed on the main spindle support frame, and the slide on the inner side of the main spindle support frame is slidably connected to the lifting guide rail;

[0023] The output end of the lifting feed motor is connected to the ball screw, the end of the ball screw is fixed in the rotating platform by the screw seat, and the screw connector is connected to the ball screw and fixed to the spindle support frame.

[0024] Furthermore, in the aforementioned automatic beveling device for repairing the weld overlay of a voltage regulator bushing, the cutting head assembly includes: a spindle servo motor, a rotary spindle, a sleeve, a spring collet, and a milling cutter.

[0025] The output end of the spindle servo motor is connected to the rotating spindle, the sleeve is sleeved on the rotating spindle, the rotating spindle is fixed on the radial movement mechanism, and the milling cutter is fixed to the end of the sleeve by the spring collet.

[0026] Furthermore, in the aforementioned automatic beveling device for repairing weld overlays of voltage regulator bushing penetrations, the cutting head assembly includes a chip collection device mounted on the bushing.

[0027] Furthermore, in the aforementioned automatic beveling device for repairing the weld overlay of a voltage regulator bushing through-piece, the monitoring component includes: a camera fixing component and a camera, wherein the camera fixing component is fixed on the clamping component, and the camera is fixed on the camera fixing component.

[0028] The present invention has the following beneficial effects:

[0029] The present invention provides an automatic beveling device for repairing the weld overlay of a voltage regulator bushing penetration. When the bottom bushing penetration of the voltage regulator lower head is repaired on-site using a cutting and overlay welding method, the device is used to process the weld overlay into a spatial elliptical J-shaped bevel, laying a structural foundation for subsequent welding. This solves the need for automatic beveling when the bottom bushing penetration of the voltage regulator lower head is repaired on-site using a cutting and overlay welding method. It provides an important automatic beveling function for on-site repair of the sealing weld of the voltage regulator bushing penetration, and at the same time, it can realize remote control and monitoring, reducing the impact of personnel radiation dose. Attached Figure Description

[0030] The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0031] Figure 1 This is a schematic diagram of the beveling process in the background art of this invention;

[0032] Figure 2 This is an overall structural diagram of the mechanical body in the automatic beveling device in an embodiment of the present invention;

[0033] Figure 3 This is a schematic diagram of the control cabinet in the automatic beveling device in an embodiment of the present invention;

[0034] Figure 4 This is a schematic diagram of the mechanical body in the automatic beveling device of this invention.

[0035] Figure 5 This is a cross-sectional view of the mechanical body in the automatic beveling device in an embodiment of the present invention;

[0036] Figure 6 This is a schematic diagram of the clamping component in the automatic beveling device of this invention.

[0037] Figure 7 This is a schematic diagram of the rotating platform in the automatic beveling device of this invention.

[0038] Figure 8 This is a schematic diagram of the radial movement mechanism in the automatic beveling device of the present invention.

[0039] Figure 9 This is a schematic diagram of the axial movement mechanism in the automatic beveling device of the present invention.

[0040] Figure 10 This is a schematic diagram of the cutting head assembly in the automatic beveling device of this invention.

[0041] Figure 11 This is a schematic diagram of the monitoring component in the automatic beveling device of this invention.

[0042] Figure 12 This is a schematic diagram of the automatic beveling device after installation in an embodiment of the present invention;

[0043] Figure 13 This is a cross-sectional view of the automatic beveling device after installation in an embodiment of the present invention;

[0044] The attached diagram shows the markings and corresponding component names:

[0045] In the diagram: 1-Mechanical body, 2-Control cabinet, 3-Clamping assembly, 4-Rotating platform, 5-Radial movement mechanism, 6-Axial feed mechanism, 7-Cutting head assembly, 8-Monitoring assembly, 9-Chuck, 10-Machine body shell, 11-Inner cylinder, 12-Bearing, 13-Worm gear, 14-Servo motor, 15-Worm wheel, 16-Upper fixing plate, 17-Spindle fixing frame, 18-Radial guide rail, 19-Spindle support frame, 20-Lifting guide rail, 21-Lifting feed motor, 22-Lead screw connector, 23-Ball screw, 24-Lead screw seat, 25-Spindle servo motor, 26-Rotating spindle, 27-Sleeve, 28-Spring chuck, 29-End mill cutter, 30-Scrap collection device, 31-Camera fixing component, 32-Camera. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0047] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0048] Example

[0049] Please refer to Figure 2 and Figure 11 The automatic beveling device for repairing the weld overlay of a voltage regulator bushing through-hole component provided in this embodiment of the invention includes: a mechanical body 1, which includes:

[0050] Clamping assembly 3 is used to assemble with the sleeve through-piece to be processed in order to achieve the installation, fixation and centering of the mechanical body 1;

[0051] Rotating platform 4 is mounted on clamping assembly 3 and is used to drive mechanical body 1 to rotate.

[0052] Radial movement mechanism 5 is mounted on rotary platform 4 and is used to drive mechanical body 1 to move radially.

[0053] An axial feed mechanism 6 and a radial movement mechanism 5 are installed inside the rotary platform 4. The axial feed mechanism 6 is used to drive the mechanical body 1 to move axially.

[0054] The rotary platform 4 works in conjunction with the axial feed mechanism 6 to achieve automatic fitting of a spatial elliptical trajectory;

[0055] The cutting head assembly 7 is mounted on the radial moving mechanism 5 and is used to perform J-shaped beveling of the sleeve through-piece to be processed.

[0056] Monitoring component 8 is installed on clamping component 3 and is used to monitor the beveling process.

[0057] The automatic beveling device is also equipped with a matching control cabinet 2, which contains a control system and a monitoring system to control and monitor the machine body 1. The control system contains beveling software, which can automatically generate machining programs by setting a trajectory. It can also drive the movement of each axis to execute the machining program, fitting a spatial elliptical J-shaped curve trajectory and controlling the motor of the machine body 1 to achieve the machining of the J-shaped welding bevel trajectory. The monitoring system connects to monitoring components and can clearly transmit real-time images and provide feedback on the real-time machining status under irradiation conditions. The rotation, feed, and machining of the machine body 1 are controlled by the program in the control cabinet 2. The entire device uses PLC integrated control and is connected to the control console via a data cable, enabling remote monitoring and control from 30 meters away. The cable length between the machine body 1 and the control cabinet 2 exceeds 30 meters, allowing for remote control and monitoring from 30 meters away.

[0058] The present invention provides an automatic beveling device for repairing the weld overlay of a voltage regulator bushing penetration. When the bottom bushing penetration of the voltage regulator lower head is repaired on-site using a cutting and overlay welding method, the device is used to process the weld overlay into a spatial elliptical J-shaped bevel, laying a structural foundation for subsequent welding. This solves the need for automatic beveling when the bottom bushing penetration of the voltage regulator lower head is repaired on-site using a cutting and overlay welding method. It provides an important automatic beveling function for on-site repair of the sealing weld of the voltage regulator bushing penetration, and at the same time, it can realize remote control and monitoring, reducing the impact of personnel radiation dose.

[0059] This invention provides an automatic beveling device for repairing weld seams on voltage regulator bushing penetrations. The device features a simplified structure, avoiding redundancy, and a compact overall design for easy installation and transportation. The wiring harnesses are carefully planned, with minimal exposed wires, resulting in a clean and aesthetically pleasing appearance. The device has a rational structural design, high strength and rigidity, and is easy to disassemble and move. It possesses functions such as processing and automatically controlling the elliptical J-shaped weld beveling of the voltage regulator lower end cap bottom bushing penetration; it meets the requirements for processing elliptical J-shaped beveling in high-radioactive environments, enabling processing in confined spaces and stable operation in a radioactive environment of 5 mSv / h.

[0060] The present invention provides an automatic beveling device for repairing weld overlays on voltage regulator bushings, solving the beveling requirements for lining plates involved in the replacement and repair of voltage regulator bushings. This device achieves the processing of J-shaped welding beveling trajectories through the linkage of a rotating platform 4, a radial drive mechanism, and an axial feed mechanism 6, effectively ensuring the feed accuracy and automatic control of the processing.

[0061] This device employs program control and servo motor 14 drive, enabling it to automatically process the bevel of the weld seam for repairing voltage regulator bushing through-parts by fitting the spatial elliptical trajectory required for J-shaped bevel machining through multi-axis linkage. The machining process is stable and easy to control, the clamping method is robust and adaptable to the field environment, meeting machining requirements. Furthermore, the radial drive mechanism can be adjusted to accommodate different bevel widths, and it features remote monitoring and debris collection functions. Test results demonstrate that the device has a simple and lightweight structure, is easy to load, unload, and operate, and can meet the requirements for automatic J-shaped bevel machining in high-level radioactive environments. The machining process is stable, achieving automatic bevel machining of the weld seam for repairing voltage regulator bushing through-parts, and can be applied to the on-site repair of voltage regulator bushing through-parts.

[0062] The present invention provides an automatic beveling device for repairing weld seams on the through-hole components of voltage regulator bushings. This device features a reasonable structural design, high strength and rigidity, and is easy to disassemble and move. It has functions such as processing and automatic control of elliptical J-shaped weld bevels on the through-hole components of the voltage regulator lower head, and also includes functions such as remote operation, remote monitoring, automatic fitting of spatial elliptical trajectories, and debris collection. This meets the automatic beveling requirements for repairing weld seams on the through-hole components of voltage regulator bushings in radioactive environments. The device is electrically driven and automatically fed, comprising four axes and consisting of a machine body and a control cabinet 2. Through the linkage of the rotating platform 4 and the axial feed mechanism 6 of the machine body, and under the control of the control system in the control cabinet 2, it achieves the processing of spatial elliptical J-shaped bevels. The device is equipped with a monitoring component 8 to monitor the beveling process in real time. In addition, the device is equipped with a debris collection device 30 to collect debris from the cutting process in real time.

[0063] In some feasible embodiments, the clamping assembly 3 includes: a housing 10 and a chuck 9, wherein a plurality of mounting brackets adapted to the chuck 9 are evenly arranged on the outer side of the housing 10, and the chuck 9 is mounted on the mounting brackets.

[0064] In some feasible methods, the mounting bracket is semi-cylindrical, and the chuck 9 is C-shaped. In this embodiment of the invention, the outer side of the machine body 10 has three semi-cylindrical mounting brackets that cooperate with the C-shaped chuck 9. The semi-cylindrical mounting brackets are assembled with adjacent components of the sleeve through-piece to be processed, and fixed by bolt connection through the C-shaped chuck 9. The clamping assembly 3 includes a total of 3 sets of high-precision chucks 9, which clamp and fix to adjacent components respectively, so as to realize the installation, fixation and centering positioning of the mechanical body 1 of the equipment.

[0065] In some feasible embodiments, the rotating platform 4 includes: an inner cylinder 11, a bearing 12, a worm gear 13, a servo motor 14, and a worm wheel 15;

[0066] Bearings 12 are installed at both ends of the outer side of the inner cylinder 11. The bearings 12 cooperate with the clamping assembly 3. The worm gear 15 is installed at the bottom of the inner cylinder 11. The output end of the servo motor 14 is connected to the worm 13, and the worm 13 meshes with the worm gear 15.

[0067] In some feasible embodiments, the rotating platform 4 further includes an upper fixing plate 16, which is mounted on the top of the inner cylinder 11. In this embodiment of the invention, two bearings 12 are respectively mounted on the outer ends of the inner cylinder 11. The bearings 12 cooperate with the outer shell 10 of the clamping assembly 3. The servo motor 14 drives the worm gear 13, which drives the worm wheel 15 to rotate. The worm wheel 15 is connected to the inner cylinder 11, thereby driving the inner cylinder 11 to rotate. The upper fixing plate 16 is bolted to the inner cylinder 11.

[0068] In some feasible embodiments, the radial movement mechanism 5 includes a spindle holder 17 and a radial guide rail 18. The radial guide rail 18 is disposed at the top of the rotary platform 4, and the spindle holder 17 is mounted on the radial guide rail 18. The radial movement mechanism 5, under the control of a motor, can meet the processing requirements of bevels with different diameters. In this embodiment of the invention, the radial guide rail 18 is a dovetail groove type slider mechanism. The spindle holder 17 can slide on the radial guide rail 18 under the drive of a motor to adjust its radial position, thereby adapting to the radial adjustment requirements of different bevel widths. It can adapt to bevel processing of Φ30-Φ80, with a maximum processable bevel width of 25mm.

[0069] In some feasible embodiments, the axial feed mechanism 6 includes: a spindle support frame 19, a lifting guide rail 20, a lifting feed motor 21, a lead screw connector 22, a ball screw 23, and a lead screw seat 24.

[0070] The spindle support frame 19 is installed inside the rotary platform 4, the lifting guide rail 20 is installed on the spindle support frame 19, and the slide on the inner side of the spindle support frame 19 is slidably connected to the lifting guide rail 20.

[0071] The output end of the lifting feed motor 21 is connected to a ball screw 23. The end of the ball screw 23 is fixed inside the rotating platform 4 by a screw seat 24. The screw connector 22 is connected to the ball screw 23 and fixed to the main shaft support frame 19. In this embodiment of the invention, the lifting guide rail 20 is fixed to the inner cylinder 11 in the rotating platform 4 by bolts. The slides on both sides of the main shaft support frame 19 are slidably connected to the lifting guide rail 20. The lifting feed motor 21 is connected to the ball screw 23 by a coupling. The ball screw 23, the screw connector 22, and the screw seat 24 form the ball screw 23 mechanism.

[0072] In some feasible embodiments, the cutting head assembly 7 includes: a spindle servo motor 25, a rotary spindle 26, a sleeve 27, a collet 28, and a milling cutter 29.

[0073] The output end of the spindle servo motor 25 is connected to the rotary spindle 26. The sleeve 27 is fitted onto the rotary spindle 26, which is fixed to the radial movement mechanism 5. The milling cutter 29 is fixed to the end of the sleeve 27 by a spring collet 28. In this embodiment of the invention, the spindle servo motor 25 drives the rotary spindle 26 to rotate. The rotary spindle 26 is fixed to the spindle fixing frame 17 in the radial movement mechanism 5 by bolts. The sleeve 27 is fixed to the rotating shaft of the rotary spindle 26 by bolts. The spring collet 28 and the chip collection device 30 are fixed to the sleeve 27 by bolts, and the spring collet 28 clamps the milling cutter 29.

[0074] In some feasible embodiments, the cutting head assembly 7 includes a chip collection device 30 mounted on the sleeve 27. The chip collection device 30 allows for the temporary storage of chips during the cutting process, reducing chip splashing.

[0075] In some feasible embodiments, the monitoring component 8 includes a camera mounting bracket 31 and a camera 32. The camera mounting bracket 31 is fixed to the clamping component 3, and the camera 32 is fixed to the camera mounting bracket 31. The camera 32 can be a combination of microscopic and macroscopic cameras, capable of monitoring the working conditions during local and overall processing. In this embodiment of the invention, the camera mounting bracket 31 is fixed to the machine housing 10 by bolts, and the camera 32 is fixed to the camera mounting bracket 31 by bolts.

[0076] Please refer to Figure 12 and Figure 13 The present invention provides an automatic beveling device for repairing overlay welds on voltage regulator bushings. The installation process is as follows:

[0077] The automatic beveling device provided by the present invention is placed at the lower end of the bottom sleeve through-part assembly of the lower end cap of the voltage regulator to be processed. The automatic beveling device is installed from bottom to top, and the device is fastened to the components around the component to be processed by raising the three C-shaped clamps 9.

[0078] The automatic beveling device for repairing weld overlays in voltage regulator bushings provided by this invention operates on the following principle:

[0079] (1) The machine body shell 10 is assembled and the mechanical body 1 is fixed and positioned by using the semi-cylindrical mounting bracket and C-shaped clamp 9 on the outer side of the machine body shell 10 in conjunction with the adjacent components of the sleeve to be processed.

[0080] (2) Driven by the servo motor 14, the rotary platform 4 rotates through the transmission structure of the worm gear 13 and worm wheel 15; the axial feed mechanism 6 moves up and down through the lifting feed motor 21, which is driven by the lifting guide rail 20 and the slides on both sides of the spindle support frame 19 and the ball screw 23, the ball screw connector 22 and the ball screw seat 24; the radial drive mechanism can adjust the spindle in the radial direction through the dovetail slide mechanism; the cutting head assembly 7 rotates by rotating the spindle motor to drive the drilling.

[0081] (3) The automatic beveling device includes four axes: the rotation axis (Y-axis) of the rotary platform 4, the Z-axis of the axial feed mechanism 6, the X-axis of the radial adjustment mechanism, and the rotation axis of the cutting head assembly 7.

[0082] (4) The Y-axis and Z-axis are linked by the control system of the control cabinet 2, thereby fitting the spatial elliptical curve trajectory required for J-shaped bevel machining. The cutting head assembly 7 is equipped with a special ball end mill 29 made of carbide material to realize the machining of J-shaped bevel.

[0083] The automatic beveling device of this invention is motor driven and includes four axes. It can automatically process bevels with a maximum width of 20mm in a radioactive environment. It can fit the spatial elliptical weld trajectory required for processing the J-shaped bevel of the space surfacing weld for the repair of the space regulator bushing through-part. The cable length between the device body and the control cabinet is 30m, which can realize automatic cutting under remote control. The device is equipped with a monitoring module and a debris collection module, which can realize real-time monitoring and debris collection of the beveling process.

[0084] The above specific embodiments further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An automatic beveling device for repairing weld overlays on bushing penetrations of voltage regulators, characterized in that, include: Mechanical body (1), the mechanical body (1) comprising: Clamping assembly (3), the clamping assembly (3) is used to assemble with the sleeve through part to be processed to realize the installation, fixation and centering of the mechanical body (1); A rotating platform (4) is mounted on the clamping assembly (3) and is used to drive the radial moving mechanism (5) to rotate. A radial moving mechanism (5) is mounted on the rotating platform (4) and is used to drive the cutting head assembly (7) to move radially. An axial feed mechanism (6) is installed inside the rotary platform (4) and is used to drive the rotary platform (4) to move axially. The rotating platform (4) cooperates with the axial feed mechanism (6) to achieve automatic fitting of a spatial elliptical trajectory; A cutting head assembly (7) is mounted on the radial moving mechanism (5) and is used to perform J-shaped beveling of the sleeve through-piece to be processed. A monitoring component (8) is installed on the clamping component (3) and is used to monitor the beveling process conditions. The clamping assembly (3) includes a chuck (9) and a housing (10). Multiple mounting brackets adapted to the chuck (9) are evenly arranged on the outer side of the housing (10). The chuck (9) is mounted on the mounting bracket. The rotating platform (4) includes: an inner cylinder (11), a bearing (12), a worm (13), a servo motor (14), and a worm wheel (15). The bearings (12) are respectively installed at both ends of the outer side of the inner cylinder (11). The bearings (12) cooperate with the outer shell (10) of the clamping assembly (3). The worm gear (15) is installed at the bottom of the inner cylinder (11). The output end of the servo motor (14) is connected to the worm (13). The worm (13) meshes with the worm gear (15).

2. The automatic beveling device for repairing weld overlays in voltage regulator bushings according to claim 1, characterized in that, The mounting bracket is semi-cylindrical, and the clamp (9) is C-shaped.

3. The automatic beveling device for repairing weld overlays in voltage regulator bushings according to claim 1, characterized in that, The rotating platform (4) further includes an upper fixing plate (16), which is installed at the top of the inner cylinder (11).

4. The automatic beveling device for repairing overlay welds on voltage regulator bushings according to claim 1, characterized in that, The radial movement mechanism (5) includes: a main shaft fixing frame (17) and a radial guide rail (18). The radial guide rail (18) is located at the top of the rotating platform (4), and the spindle fixing frame (17) is mounted on the radial guide rail (18). The radial moving mechanism (5) is controlled by a motor to meet the processing requirements of bevels of different diameters.

5. The automatic beveling device for repairing overlay welds on voltage regulator bushings according to claim 1, characterized in that, The axial feed mechanism (6) includes: a spindle support frame (19), a lifting guide rail (20), a lifting feed motor (21), a lead screw connector (22), a ball screw (23), and a lead screw seat (24). The main spindle support frame (19) is installed inside the rotating platform (4), the lifting guide rail (20) is installed on the main spindle support frame (19), and the slide on the inner side of the main spindle support frame (19) is slidably connected to the lifting guide rail (20); The output end of the lifting feed motor (21) is connected to the ball screw (23). The end of the ball screw (23) is fixed in the rotating platform (4) by the screw seat (24). The screw connector (22) is connected to the ball screw (23) and the screw connector (22) is fixed on the spindle support frame (19).

6. The automatic beveling device for repairing overlay welds on voltage regulator bushings according to claim 1, characterized in that, The cutting head assembly (7) includes: a spindle servo motor (25), a rotary spindle (26), a sleeve (27), a spring collet (28), and a milling cutter (29). The output end of the spindle servo motor (25) is connected to the rotating spindle (26), the sleeve (27) is sleeved on the rotating spindle (26), the rotating spindle (26) is fixed on the radial moving mechanism (5), and the milling cutter (29) is fixed to the end of the sleeve (27) by the spring collet (28).

7. The automatic beveling device for repairing overlay welds on voltage regulator bushings according to claim 6, characterized in that, The cutting head assembly (7) includes a chip collection device (30) mounted on the sleeve (27).

8. The automatic beveling device for repairing overlay welds on voltage regulator bushings according to claim 1, characterized in that, The monitoring component (8) includes a camera fixture (31) and a camera (32). The camera fixture (31) is fixed on the clamping component (3), and the camera (32) is fixed on the camera fixture (31).

Images