Precise sealing process and tool device for X-ray tube cathode and anode packaging

Abstract

According to the X-ray tube cathode and anode packaging precision sealing process and tool device, a bottom sealing glass shell and an anode assembly are sealed through a first tool clamp, and a first sealing assembly is obtained; the central hole of the pipe body and the first sealing assembly are in coaxial butt joint through a second tool clamp and are fixedly connected in an elastic mode; the second tool clamp, the fixed first sealing assembly and the tube body are placed on a workbench of an image measuring instrument together, the image measuring instrument measures the concentricity of the cathode electron gun sleeve, the centering hole and the beam outlet hole, and after centering is completed, the second tool clamp is locked to fix the relative position of the tube body and the first sealing assembly; and on a fixed second tool clamp, argon arc welding spot welding is conducted on the opening of the bottom-sealed glass shell and the welding end face of the tube body, a second sealing assembly of a fixed connection point is formed, then the second sealing assembly is transferred to argon arc welding equipment, the opening of the bottom-sealed glass shell and the welding end face of the tube body are welded in a whole circle, and the centering sealing process is completed.

Description

Technical Field

[0001] This invention relates to the field of fastener production equipment technology, specifically to a process and tooling device for precision sealing of X-ray tube anode and cathode packaging. Background Technology

[0002] An X-ray tube consists of a cathode, an anode, and an outer glass shell. The cathode emits electrons, while the anode provides the target surface and heat dissipation. A high voltage is applied across both the cathode and anode to generate an electric field that accelerates electrons. These electrons then strike the target surface, producing X-rays through bremsstrahlung. The glass shell secures the cathode and anode and provides a suitable vacuum environment for stable electron transport. Glass sealing is a crucial step in the X-ray tube manufacturing process.

[0003] To ensure the required precision of X-ray tube focal imaging, it is essential to first ensure the position of the X-ray tube's focal point, especially for end-window X-ray tubes. Ensuring the coaxiality of the anode, cathode, and glass shell seal, as well as the concentricity of the side cathode electron gun, is also a technical challenge. Because the focal point is small, only 3-5 micrometers, the required precision of X-ray tube focal imaging is even higher, leading to significant difficulties in concentric high-precision assembly.

[0004] In the prior art, such as the appendix to the specification... Figure 1 As shown, X-ray tube sealing typically involves aligning the anode and cathode by marking lines separately. However, this method is insufficient for the focusing precision required for microfocal tubes. Therefore, a mechanical tooling mold is used for precise sealing. At one end of the sealing lathe, the tube body and sealing glass shell assembly are installed into the tooling. The anode assembly is then installed at the other end of the sealing lathe. Moving the lathe slide pushes the anode into the tube body and sealing glass shell assembly. The anode assembly is then adjusted and rotated within the cathode side hole to insert the locating pin into the anode cap hole. Finally, the tooling is fitted and locked in place for bottom sealing. Due to the thermal expansion and contraction during metal-glass sealing and annealing, the final yield is not high. It is evident that the concentricity of the existing sealing process depends on the precision of the lathe, the control of the annealing process, and the operating skills of the employees. Moreover, whether the glass shell and cathode assembly are sealed first or the glass shell and anode assembly are sealed first, the intermediate products need to be annealed and cooled before the products are clamped again to seal the remaining anode or cathode assembly. This secondary positioning process also leads to the non-concentricity of the cathode and anode assemblies.

[0005] Therefore, improving the sealing and alignment process, optimizing the coaxiality of the anode, cathode, and glass shell sealing, and the concentricity of the side cathode electron gun, can significantly improve the production quality of X-ray tubes. Summary of the Invention

[0006] To address the shortcomings of the aforementioned technologies, this invention provides a process and tooling device for precision sealing of X-ray tube anode and cathode packaging.

[0007] A further feature of the present invention: a precision sealing process for the anode and cathode of an X-ray tube, comprising the following steps: S1. The bottom glass shell and the anode assembly are sealed together using the first tooling fixture to obtain the first sealing assembly; Step S2. Use the second tooling fixture to coaxially connect the central hole of the tube body and the first sealing assembly, and make a loosely and securely fixed connection; The tube body includes a welded end face that is connected to the open end of the bottom glass shell. A central hole is provided at the welded end face. The anode assembly is inserted into the central hole in a concentric arrangement. The end of the anode assembly inserted is provided with a wire outlet hole in the radial direction. A centering hole is provided in the radial direction on the outer circumferential surface of the tube body, which extends to the central hole. A cathode electron gun sleeve is provided at the centering hole. Step S3. Place the second tooling fixture together with the fixed first sealing assembly and the tube body on the worktable of the image measuring instrument. The image measuring instrument measures the concentricity of the cathode electron gun sleeve, the centering hole and the output wire hole. By adjusting the tightness of the second tooling fixture and rotating the first sealing assembly, the concentricity of the output wire hole and the cathode electron gun sleeve and the centering hole is controlled. After the alignment is completed, the second tooling fixture is locked to fix the relative position of the tube body and the first sealing assembly. Step 4. On the fixed second tooling fixture, perform argon arc welding on the bottom glass shell opening and the tube welding end face to form the second sealing assembly with fixed connection point. Remove the second sealing assembly from the second tooling fixture and transfer it to the argon arc welding equipment to perform full-circle welding on the bottom glass shell opening and the tube welding end face to complete the centering sealing process.

[0008] A further feature of the present invention is as follows: The first tooling fixture in step S1 includes a central receiving groove. On the end face where the groove opening of the central receiving groove is located, an annular groove is concentrically arranged. An O-ring is provided at the bottom of the annular groove. Several pin holes are radially arranged at the annular groove, penetrating to the outer circumference of the first tooling fixture. The diameter of the opening end of the bottom sealing glass shell is adapted to the diameter of the annular groove and is coaxially inserted into the annular groove. A tightening screw is screwed into the pin holes to fix the bottom sealing glass shell by radial pressure. Then, the encapsulation of the anode assembly and the bottom sealing glass shell is completed to obtain the first sealing assembly. The first tooling fixture is provided with an air blowing hole for sealing (necessary for anti-oxidation and sealing during sealing).

[0009] Further configuration of the present invention: The second tooling fixture in step S2 includes a base, a tube fixing seat disposed on the base, an axial limiting plate, a pair of radial limiting plates, and a support platform. The tube fixing seat is provided with an installation groove adapted to the outer peripheral contour shape of the tube. The central hole of the tube is inserted into the installation groove in a horizontal axial position. The axial limiting plates are spaced apart on one side of the tube's axial direction. The axial limiting plates are coaxially provided with a first adjusting screw hole and a first adjusting screw. The first sealing assembly is placed between the axial limiting plate and the tube and is coaxially connected to the tube. The first adjusting screw is spirally fed along the first adjusting screw hole and abuts against the other end face of the bottom sealing glass shell relative to the open end for axial clamping and fixing. The support platform is located vertically below the first sealing assembly, supporting the first sealing assembly and the tube body coaxially. The pair of radial limiting plates are located on both sides of the first sealing assembly in the radial direction, and are provided with second adjusting screw holes and second adjusting screws corresponding to the position of the first sealing assembly. The second adjusting screws on the pair of radial limiting plates are screwed in to clamp the first sealing assembly. A further feature of the present invention is that the tightness adjustment of the second tooling fixture in step S3 is achieved by adjusting the tightness of the first adjusting screw and the second adjusting screw on the second tooling fixture, adjusting the height of the support platform, and adjusting the angle of the first sealing assembly to control the concentricity of the wire hole, the cathode electron gun sleeve, and the centering hole. After centering is completed, the first adjusting screw and the second adjusting screw are locked to fix the relative position of the tube body and the first sealing assembly.

[0010] The technical solution of the present invention: the device includes a first tooling fixture and a second tooling fixture; The first tooling fixture includes a central receiving groove. On the end face where the groove opening of the central receiving groove is located, an annular groove is concentrically provided. An O-ring is provided at the bottom of the annular groove. Several pin holes are provided radially at the annular groove, penetrating to the outer circumference of the first tooling fixture. The diameter of the opening end of the bottom sealing glass shell is adapted to the diameter of the annular groove and is coaxially inserted into the annular groove. A tightening screw is screwed into the pin hole and the bottom sealing glass shell is fixed by radially pressing it. The second tooling fixture includes a base, a tube fixing seat mounted on the base, an axial limiting plate, a pair of radial limiting plates, and a support platform. The tube fixing seat is provided with a mounting groove that matches the outer circumferential contour of the tube. The tube's central hole is inserted into the mounting groove in a horizontal axial position. The axial limiting plates are spaced apart on one side of the tube's axial direction. The axial limiting plates are coaxially provided with a first adjusting screw hole and a first adjusting screw, which are coaxially connected between the axial limiting plate and the tube. The first adjusting screw is spirally fed along the first adjusting screw hole and abuts against the other end face of the bottom sealing glass shell relative to the open end for axial clamping and fixing. The support platform is located vertically below the first sealing assembly, supporting the first sealing assembly and the tube body coaxially. The pair of radial limiting plates are located on both sides of the first sealing assembly in the radial direction, and are provided with second adjusting screw holes and second adjusting screws corresponding to the position of the first sealing assembly. The second adjusting screws on the pair of radial limiting plates are screwed in to clamp the first sealing assembly.

[0011] A further feature of the present invention is that the base is provided with a third adjusting screw hole, and the support is provided with a third adjusting screw that is adapted to the third adjusting screw hole. The support is spirally fed to control the height in the vertical direction.

[0012] A further feature of the present invention is that the base is provided with a plurality of positioning holes, and the tube body fixing seat, the axial limiting plate, and a pair of radial limiting plates are separately provided with the base and are fixed by screws through the positioning holes.

[0013] The beneficial effects of this invention are as follows: It changes the traditional sealing process and method, eliminates the influence of thermal expansion and contraction during metal-glass sealing, and uses a specially designed tooling fixture to first seal the bottom glass shell and anode assembly. Then, the tube body and the glass shell anode sealing assembly are installed in a second tooling fixture and aligned with a 3D projector. By rotating the glass shell anode sealing assembly and adjusting its position, the focus center accuracy can be effectively controlled. After alignment, the tube body is welded to the Kovar on the glass shell anode sealing assembly. This sealing process ensures the coaxiality of the tube end window, anode, cathode, and glass shell sealing, as well as the concentricity of the side cathode electron gun, thereby ensuring the tube focusing accuracy (alignment accuracy can reach the micrometer level) and improving the production yield. Attached Figure Description

[0015] Figure 1 The structure of this embodiment of the invention Figure 1 ; Figure 2 The structure of this embodiment of the invention Figure 2 ; Figure 3 The structure of this embodiment of the invention Figure 3 ; Figure 4 The structure of this embodiment of the invention Figure 4 ; Figure 5 The structure of this embodiment of the invention Figure 5 ; Figure 6 The structure of this embodiment of the invention Figure 6 ; Figure 7 The structure of this embodiment of the invention Figure 7 ; Figure 8This is a schematic diagram illustrating the measurement of the concentricity of the cathode electron gun sleeve, the centering hole, and the beam exit hole using an image measuring instrument according to an embodiment of the present invention.

[0016] Among them, 1-first tooling fixture, 11-center receiving groove, 12-annular groove, 13-O-ring, 14-pin hole, 15-tightening screw, 16-air blowing hole, 2-first sealing assembly, 21-bottom sealing glass shell, 22-anode assembly, 221-outlet wire hole, 4-second tooling fixture, 41-base, 42-fixed seat, 421-mounting groove, 53-axial limiting plate, 44-radial limiting plate, 45-support platform, 46-first adjusting screw, 47-second adjusting screw, 5-tube body, 51-center hole, 52-alignment hole, 53-cathode electron gun sleeve, 54-welding end face.

[0017] To better illustrate this embodiment, some parts in the accompanying drawings may be omitted, enlarged, or reduced, and do not represent the actual size of the product. Furthermore, the accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. Detailed Implementation

[0019] To make the technical solution and advantages of this application clearer, the technical solution of this application will be described in a clearer and more complete manner below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some embodiments of this application, and are only used to explain this application, not to limit this application. It should be noted that, for ease of description, only the parts related to this application are shown in the accompanying drawings. Other related parts can be referred to the general design. In the absence of conflict, the embodiments and technical features in the embodiments of this application can be combined with each other to obtain new embodiments.

[0020] The invention will now be described in detail with reference to the accompanying drawings, such as... Figure 1-8 As shown, A precision sealing process for the anode and cathode of an X-ray tube includes the following steps. S1. The bottom glass shell 21 and the anode assembly 22 are sealed together using the first tooling fixture 1 to obtain the first sealing assembly 2; Step S2. Use the second tooling fixture 4 to coaxially connect the center hole 51 of the tube body 5 and the first sealing assembly 2, and make a loosely and tightly fixed connection. The tube body 5 includes a welding end face 54 that is connected to the open end of the bottom glass shell 21. A central hole 51 is provided at the welding end face 54. The anode assembly 22 is inserted into the central hole 51 and is arranged concentrically. The end of the anode assembly 22 inserted is provided with a beam outlet hole 221 in the radial direction. The outer peripheral surface of the tube body 5 is provided with a centering hole 52 that penetrates to the central hole 51 in the radial direction. A cathode electron gun sleeve 53 is provided at the centering hole 52. Step S3. Place the second tooling fixture 4 together with the fixed first sealing assembly 2 and tube body 5 on the worktable of the image measuring instrument. The image measuring instrument measures the concentricity of the cathode electron gun sleeve 53, the centering hole 52 and the output wire hole 221. By adjusting the tightness of the second tooling fixture 4 and rotating the first sealing assembly 2, the concentricity of the output wire hole 221 with the cathode electron gun sleeve 53 and the centering hole 52 is controlled. After the alignment is completed, the second tooling fixture 4 is locked to fix the relative position of the tube body 5 and the first sealing assembly 2. Step 4. On the fixed second tooling fixture 4, perform argon arc welding on the opening of the bottom glass shell 21 and the welding end face 54 of the tube body 5 to form a second sealing assembly with a fixed connection point. Remove the second sealing assembly from the second tooling fixture 4 and transfer it to the argon arc welding equipment to perform full-circle welding on the opening of the bottom glass shell 21 and the welding end face 54 of the tube body 5 to complete the centering sealing process.

[0021] Further configuration of the present invention: The first tooling fixture 1 in step S1 includes a central receiving groove 11. On the end face where the groove opening of the central receiving groove 11 is located, an annular groove 12 is concentrically provided. An O-ring 13 is provided at the bottom of the annular groove 12. A plurality of pin holes 14 are provided radially at the annular groove 12, penetrating to the outer circumference of the first tooling fixture 1. The diameter of the opening end of the bottom sealing glass shell 21 is adapted to the diameter of the annular groove 12 and is coaxially inserted into the annular groove 12. A tightening screw 15 is screwed into the pin hole 14 and fixed by radially pressing the bottom sealing glass shell 21. Then the encapsulation of the anode assembly 22 and the bottom sealing glass shell 21 is completed to obtain the first sealing assembly 2. The second tooling fixture 4 in step S2 includes a base 41, a tube body 5 fixing seat 42 disposed on the base 41, an axial limiting plate 43, a pair of radial limiting plates 44, and a support platform 45. The tube body 5 fixing seat 42 is provided with a mounting groove 421 adapted to the outer circumferential contour shape of the tube body 5. The central hole 51 of the tube body 5 is inserted into the mounting groove 421 in a horizontal axial position. The axial limiting plates 43 are spaced apart on one side of the tube body 5 along the axial direction. The axial limiting plates 43 are coaxially provided with a first adjusting screw hole and a first adjusting screw 46 on the axial limiting plate 43 and the central hole 51. The first sealing assembly 2 is placed between the axial limiting plate 43 and the tube body 5 and is coaxially connected with the tube body 5. The first adjusting screw 46 is spirally fed along the first adjusting screw hole and abuts against the other end face of the bottom sealing glass shell 21 relative to the open end for axial clamping and fixing. The support platform 45 is located vertically below the first sealing assembly 2, supporting the first sealing assembly 2 and the tube body 5 coaxially. The pair of radial limiting plates 44 are located on both sides of the first sealing assembly 2 in the radial direction, and are provided with second adjusting screw holes and second adjusting screws 47 corresponding to the position of the first sealing assembly 2. The second adjusting screws 47 on the pair of radial limiting plates 44 are screwed in to clamp the first sealing assembly 2. The tightness adjustment of the second tooling fixture 4 in step S3 is achieved by adjusting the tightness of the first adjusting screw 46 and the second adjusting screw 47 on the second tooling fixture 4. This adjusts the height of the support platform 45 and the angle of rotation of the first sealing assembly 2, thereby controlling the concentricity of the wire hole 221 with the cathode electron gun sleeve 53 and the centering hole 52. After centering is completed, the first adjusting screw 46 and the second adjusting screw 47 are locked to fix the relative position of the tube body 5 and the first sealing assembly 2.

[0022] The device includes a first tooling fixture 1 and a second tooling fixture 4; The first tooling fixture 1 includes a central receiving groove 11. On the end face where the groove opening of the central receiving groove 11 is located, an annular groove 12 is concentrically provided. An O-ring 13 is provided at the bottom of the annular groove 12. A plurality of pin holes 14 are provided radially at the annular groove 12, extending to the outer circumference of the first tooling fixture 1. The diameter of the opening end of the bottom sealing glass shell 21 is adapted to the diameter of the annular groove 12 and is coaxially inserted into the annular groove 12. A tightening screw 15 is screwed into the pin hole 14 and the bottom sealing glass shell 21 is fixed by radially pressing. The second tooling fixture 4 includes a base 41, a tube body 5 fixing seat 42 disposed on the base 41, an axial limiting plate 43, a pair of radial limiting plates 44, and a support platform 45. The tube body 5 fixing seat 42 is provided with a mounting groove 421 adapted to the outer circumferential contour shape of the tube body 5. The central hole 51 of the tube body 5 is inserted into the mounting groove 421 in a horizontal axial position. The axial limiting plates 43 are spaced apart on one side of the tube body 5 along the axial direction. The axial limiting plates 43 are coaxially provided with a first adjusting screw hole and a first adjusting screw 46 on the axial limiting plate 43 and the central hole 51. The first sealing assembly 2 is placed between the axial limiting plate 43 and the tube body 5 and is coaxially connected with the tube body 5. The first adjusting screw 46 is spirally fed along the first adjusting screw hole and abuts against the other end face of the bottom sealing glass shell 21 relative to the open end for axial clamping and fixing. The support platform 45 is located vertically below the first sealing assembly 2, supporting the first sealing assembly 2 and the tube body 5 coaxially. The pair of radial limiting plates 44 are located on both sides of the first sealing assembly 2 in the radial direction, and are provided with second adjusting screw holes and second adjusting screws 47 corresponding to the position of the first sealing assembly 2. The second adjusting screws 47 on the pair of radial limiting plates 44 are screwed in to clamp the first sealing assembly 2.

[0023] The base 41 is provided with a third adjusting screw hole, and the support 45 is provided with a third adjusting screw that matches the third adjusting screw hole. The support 45 is spirally fed to control the height in the vertical direction.

[0024] The base 41 is provided with a number of positioning holes 411. The tube body 5 fixing seat 42, axial limiting plate 43, and a pair of radial limiting plates 44 are separately provided with the base 41 and are fixed by screws through the positioning holes 411.

[0025] This process changes the traditional sealing process and method, eliminating the influence of thermal expansion and contraction during metal-glass sealing. A specially designed fixture is used to first seal the bottom glass shell and anode assembly 22. Then, the tube body 5 and the glass shell anode sealing assembly are placed into a second fixture 4 and aligned using a 3D projector. By rotating the glass shell anode sealing assembly and adjusting its position, the focus center accuracy can be effectively controlled. After alignment, the tube body 5 is welded to the Kovar on the glass shell anode sealing assembly. This sealing process ensures the coaxiality of the tube end window, anode, cathode, and glass shell seal, as well as the concentricity of the side cathode electron gun, thus guaranteeing the tube's focusing accuracy (alignment accuracy can reach the micrometer level) and improving the production yield.

[0026] The technical solution of this application has been described in conjunction with the preferred embodiments shown in the accompanying drawings. Those skilled in the art should understand that the scope of protection of this application is obviously not limited to these specific embodiments. Without departing from the principles of this application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of this application.

Claims

1. A process for precision sealing of X-ray tube anode-cathode package in a sealing chamber, characterized by: It comprises the following steps, S1. sealing the bottomed glass shell and the anode assembly by the first tooling fixture to obtain a first sealing assembly; Step S2. The center hole of the tube body and the first sealing assembly are coaxially butted and fixedly connected by the second tooling fixture; The tube body comprises a welding end face butted with the open end of the bottomed glass shell, the center hole is provided at the welding end face, the anode assembly is coaxially arranged by being inserted into the center hole, the end of the anode assembly inserted is provided with a beam hole along the radial direction, and the outer peripheral surface of the tube body is provided with a centering hole penetrating to the center hole along the radial direction, and the centering hole is provided with a cathode electron gun sleeve; Step S3. The second tooling fixture is placed on the workbench of the image measuring instrument together with the fixed first sealing assembly and the tube body, the concentricity of the cathode electron gun sleeve, the centering hole and the beam hole is measured by the image measuring instrument, the concentricity of the beam hole and the cathode electron gun sleeve and the centering hole is controlled by the loose adjustment of the second tooling fixture and the rotation of the first sealing assembly, and after the centering is completed, the second tooling fixture is locked to fix the relative position of the tube body and the first sealing assembly; Step 4. The open end of the bottomed glass shell and the welding end face of the tube body are spot welded by argon arc welding on the fixed second tooling fixture to form a second sealing assembly with a fixed connection point, the second sealing assembly is disassembled from the second tooling fixture and transferred to an argon arc welding device, the open end of the bottomed glass shell and the welding end face of the tube body are whole-circle welded, and the centering and sealing process is completed.

2. The centering and sealing process of the X-ray tube anode and cathode assembly according to claim 1, characterized in that: The first tooling fixture in step S1 comprises a center accommodating groove, an annular groove is coaxially arranged on the end face of the groove opening of the center accommodating groove, an O-ring is arranged at the groove bottom of the annular groove, a plurality of pin holes penetrating to the outer peripheral surface of the first tooling fixture are arranged along the radial direction at the annular groove, the diameter of the open end of the bottomed glass shell is adapted to the diameter of the annular groove, and the open end of the bottomed glass shell is coaxially inserted into the annular groove, a top screw is screwed into the pin hole to radially press and fix the bottomed glass shell, and then the anode assembly and the bottomed glass shell are packaged to obtain the first sealing assembly.

3. The process for X-ray tube anode encapsulation according to claim 1, wherein: The second tooling fixture in step S2 comprises a base, a tube body fixing seat arranged on the base, an axial limiting plate, a pair of radial limiting plates, and a supporting table, the tube body fixing seat is provided with a mounting groove adapted to the contour shape of the outer peripheral surface of the tube body, the tube body center hole is horizontally inserted into the mounting groove in the axial direction, the axial limiting plate is arranged on one side of the tube body in the axial direction, a first adjusting screw hole and a first adjusting screw are coaxially arranged on the axial limiting plate, the first sealing assembly is placed between the axial limiting plate and the tube body and is coaxially butted with the tube body, the first adjusting screw is screw fed along the first adjusting screw hole and abuts against the other end face of the bottomed glass shell relative to the open end to axially clamp and fix the bottomed glass shell. The support table is arranged vertically below the first sealing assembly, supports the first sealing assembly coaxially with the tube body, the pair of radial limiting plates are arranged on the two sides of the first sealing assembly in the radial direction, and the second adjusting screw holes and the second adjusting screws are arranged at positions corresponding to the first sealing assembly, and the second adjusting screws on the pair of radial limiting plates are screwed to clamp the first sealing assembly.

4. The process for precision sealing of the X-ray tube anode-cathode assembly according to claim 3, characterized in that: The tightness of the second tooling fixture in the step S3 is adjusted by the tightness of the first adjusting screw and the second adjusting screw on the second tooling fixture, the height of the support table is adjusted, and the angle of the first sealing assembly is changed, so that the concentricity of the beam line hole and the cathode electron gun sleeve and the centering hole is controlled, and after the centering is completed, the first adjusting screw and the second adjusting screw are locked to fix the relative position of the tube body and the first sealing assembly.

5. An X-ray tube anode-cathode encapsulation precision sealing device, characterized in that: The device comprises a first tooling fixture and a second tooling fixture; The first tooling fixture comprises a central accommodating groove, an annular groove is arranged concentrically on the end face of the slot opening of the central accommodating groove, an O-ring is arranged on the groove bottom of the annular groove, a plurality of pin holes penetrating to the outer peripheral surface of the first tooling fixture are arranged radially at the annular groove, the diameter of the open end of the bottom-sealing glass shell is matched with the diameter of the annular groove, and the bottom-sealing glass shell is coaxially inserted into the annular groove, and the pin holes are screwed into the jacking screws to fix the bottom-sealing glass shell by radial compression; The second tooling fixture comprises a base, a tube body fixing seat arranged on the base, an axial limiting plate, a pair of radial limiting plates, and a support table, the tube body fixing seat is provided with a mounting groove matched with the contour shape of the outer peripheral surface of the tube body, the central hole of the tube body is inserted into the mounting groove in a horizontal posture in the axial direction, the axial limiting plate is arranged on one side of the tube body in the axial direction, the first adjusting screw hole and the first adjusting screw are arranged coaxially on the axial limiting plate, the first sealing assembly is placed between the axial limiting plate and the tube body coaxially and abuts against the tube body, the first adjusting screw is screwed into the first adjusting screw hole and abuts against the other end face of the bottom-sealing glass shell relative to the open end to axially clamp and fix the bottom-sealing glass shell; The support table is arranged vertically below the first sealing assembly, supports the first sealing assembly coaxially with the tube body, the pair of radial limiting plates are arranged on the two sides of the first sealing assembly in the radial direction, and the second adjusting screw holes and the second adjusting screws are arranged at positions corresponding to the first sealing assembly, and the second adjusting screws on the pair of radial limiting plates are screwed to clamp the first sealing assembly.

6. The precision sealing tooling device for X-ray tube anode-cathode encapsulation according to claim 5, wherein: The base is provided with a third adjusting screw hole, the support table is provided with a third adjusting screw matched with the third adjusting screw hole, and the support table is screwed to control the height in the vertical direction.

7. The precision sealing tooling device for X-ray tube anode-cathode encapsulation according to claim 6, characterized in that: The base is provided with a plurality of positioning holes, the tube body fixing seat, the axial limiting plate, and the pair of radial limiting plates are arranged separately from the base and are fixed by screws through the positioning holes, and the first adjusting screw, the second adjusting screw, and the support table are provided with rubber pads.

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