Positioning device and assembling method for anode and focusing electrode of strip electron beam klystron

Abstract

The invention provides a positioning device and an assembling method for an anode and a focusing electrode of a band-shaped electron beam klystron, and the positioning device comprises a pedestal which forms an accommodation space with an opening at the upper end, and a gun shell is detachably installed in the accommodation space; the first adjusting assembly is mounted on the base and used for adjustably arranging the second positioning piece on the first positioning piece; the adjusting ring replaces the anode and is arranged at the upper end of the second positioning piece, and the first adjusting assembly adjusts the parallelism and the height difference between the adjusting ring and a focusing electrode of the focusing electrode assembly so as to position the first positioning piece in the axial direction; the second adjusting assembly drives the second positioning piece to move and rotate in the radial direction of the gun shell relative to the gun shell so as to adjust the concentricity of the first axis where the adjusting ring is located and the second axis where the focusing electrode is located, adjust the included angle between the adjusting ring and the focusing electrode in the horizontal plane and position the second positioning piece and the first positioning piece. And positioning of the anode assembly and the focusing electrode assembly is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of millimeter wave electric vacuum devices, and in particular to a positioning device and an assembly method for an anode and a focusing electrode of a strip-shaped electron injection klystron. Background Art

[0002] Klystron, as the core power source of linear accelerator, is a precision-built microwave power device that focuses on achieving significant amplification of microwave energy. The structure of klystron is intricate, and its design and manufacturing are highly technically challenging. High-power klystron cleverly uses the principle of velocity modulation to efficiently convert the kinetic energy of the electron beam into microwave radiation energy, showing extraordinary characteristics of high power, high efficiency, high gain and excellent stability, and firmly occupies the top position in pulse and average power output among microwave vacuum electronic devices.

[0003] Klystron technology has been reborn along with the leaps in particle accelerator technology, the innovation of radar and communication systems, and the continuous progress of vacuum electronics technology. Various types of high-power klystrons have emerged. The operating frequency of high-power klystrons spans the entire microwave frequency band and further extends to the vast world of millimeter wave and terahertz bands, achieving an amazing breakthrough of pulse power up to 200MW, and the average (continuous wave) power has also reached the megawatt level, demonstrating unparalleled energy conversion capabilities. Driven by the exploration of high-energy particle acceleration, the upgrade of broadband radar systems, and the vigorous development of millimeter wave and terahertz wave electronic systems, high-power klystron technology has achieved unprecedented brilliant achievements.

[0004] As a special type of klystron, the characteristics of the ribbon electron beam klystron are mainly reflected in the following aspects: On the one hand, the uniqueness of the electron beam shape. The ribbon electron beam klystron uses an electron beam with a rectangular or elliptical cross-section, replacing the circular cross-section electron beam of the traditional klystron. This design increases the cross-sectional area of ​​the electron beam, thereby greatly increasing the total current of the electron beam while maintaining a certain electron beam current density. On the other hand, it has high power output capability. Due to the increase in the cross-sectional area of ​​the electron beam, the ribbon electron beam klystron can obtain higher output power at high operating frequencies, which gives it a significant advantage in application scenarios that require high power output.

[0005] However, the electron gun of the strip electron injection klystron faces many complex and delicate problems during the assembly process, such as the structural design of the electron gun electrodes, machining accuracy, brazing accuracy, and assembly and welding process of the relative position of the electrodes. These problems lead to low assembly accuracy of the electron gun, thus affecting the performance of the strip electron injection klystron. Summary of the invention

[0006] In view of this, the present disclosure provides a positioning device and an assembly method for an anode and a focusing electrode of a strip-shaped electron injection klystron, which can improve the assembly accuracy of the anode assembly and the focusing electrode assembly of the strip-shaped electron injection klystron.

[0007] As one aspect of an embodiment of the present disclosure, a positioning device is provided for positioning an anode assembly and a focusing electrode assembly of a strip-shaped electron beam klystron, wherein the anode assembly includes a first positioning member, a second positioning member and an anode, and the positioning device includes a base, a first adjustment member, an adjustment ring and a second adjustment member. The base forms a receiving space with an upper end opening, and a gun shell of the strip-shaped electron beam klystron is detachably mounted in the receiving space; wherein the focusing electrode assembly is mounted on the gun shell, and the first positioning member is adjustably arranged on the gun shell. The first adjustment member is mounted on the base, and is suitable for adjustably arranging the second positioning member on the first positioning member. The adjustment ring replaces the anode and is arranged at the upper end of the second positioning member, and the first adjustment member is also suitable for driving the adjustment ring to move in the axial direction, adjusting the parallelism and height difference between the adjustment ring and the focusing electrode of the focusing electrode assembly, so as to position the first positioning member in the axial direction. The second adjustment component is suitable for driving the second positioning member to translate and rotate relative to the gun housing in the radial direction of the gun housing, so as to adjust the concentricity of the first axis where the adjustment ring is located and the second axis where the focusing electrode is located, and adjust the angle between the adjustment ring and the focusing electrode in the horizontal plane, position the first positioning member, and realize the positioning of the anode assembly and the focusing electrode assembly.

[0008] According to an embodiment of the present disclosure, the side wall of the upper part of the base forms two slide grooves arranged opposite to each other at the radial ends of the side wall. The first adjustment component includes a tray and a first drive unit. The tray has an opening, and the connecting wall between the two slide grooves is passed through the opening so that the tray is inserted into the two slide grooves, so that the tray lifts the upper end of the second positioning member, wherein the height of the slide groove is greater than the thickness of the tray. The first drive unit is installed on the side wall and is suitable for adjusting the position of the edge of the tray in the axial direction, thereby adjusting the parallelism and the height difference between the upper surface and the first surface.

[0009] According to an embodiment of the present disclosure, the surface of the tray away from the first adjustment unit is recessed downward to form a groove, and the upper edge of the second positioning member is concavely matched with the groove to allow the second positioning member to rotate in the groove under the drive of the second adjustment unit, and allow the second positioning member to follow the adjustment ring to move in the radial direction.

[0010] According to an embodiment of the present disclosure, the second adjustment assembly includes a protective member and a second drive unit. The protective member is disposed on the adjustment ring and is relatively stationary with the adjustment ring in the radial direction. The second drive unit is mounted on the base and is adapted to drive the protective member in multiple directions so that the protective member drives the adjustment ring to move in the radial direction to adjust the concentricity and the angle.

[0011] According to an embodiment of the present disclosure, the protective member includes a main body and four arc-shaped portions. The main body forms an observation hole extending along the axial direction, and the two first walls located on opposite sides of the observation hole are configured to be tapered, so that at least one of the first walls can be driven by the second driving unit to press the protective member against the adjustment ring, and the protective member drives the second positioning member to move in the radial direction. The four arc-shaped portions are respectively arranged on the intersection of the two first walls and the two second walls connecting the two first walls, so that at least one arc-shaped portion can be driven by the second driving unit to make the protective member rotate, and push the two adjacent arc-shaped portions to move in the second direction toward the other two arc-shaped portions.

[0012] According to an embodiment of the present disclosure, the bottom surfaces of the two first walls extend downward to form protrusions respectively; the two protrusions are matched with the first matching holes on the adjustment ring to limit the position and direction of the protective member in the radial direction relative to the adjustment ring.

[0013] According to an embodiment of the present disclosure, each of the arc-shaped portions has a threaded hole extending downward; an external bolt is threadedly coupled to the arc-shaped portion and extends downward through the adjustment ring into the second positioning member to limit the relative position between the second positioning member and the protective member in the radial direction.

[0014] According to an embodiment of the present disclosure, the positioning device further includes a third adjustment component, which is installed at the lower portion of the base and is suitable for supporting the base and adjusting the parallelism of the focusing pole relative to the horizontal plane.

[0015] According to an embodiment of the present disclosure, the fitting clearance between the adjustment ring and the second positioning member is smaller than the fitting clearance between the anode and the anode positioning member.

[0016] As another aspect of the embodiments of the present disclosure, a method for assembling an anode assembly and a focusing electrode assembly of a strip-shaped electron beam klystron using any of the above positioning devices is provided, comprising:

[0017] Installing the gun housing in the receiving space of the base, wherein the focusing electrode assembly is installed on the gun housing;

[0018] placing a first positioning member, a second positioning member and an adjusting ring on the gun housing in sequence;

[0019] Using a first adjustment assembly to support the second positioning member;

[0020] Adjust the parallelism and height difference between the adjustment ring and the focusing pole of the focusing pole assembly by means of a first adjustment assembly;

[0021] Press the second adjustment assembly against the adjustment ring;

[0022] The adjusting ring is driven to move in the radial direction by a second adjusting component to adjust the concentricity and the angle in the horizontal plane between the adjusting ring and the focusing pole;

[0023] Pre-fixing the gun housing and the first positioning member, and pre-fixing the first positioning member and the second positioning member;

[0024] The base, the first adjustment assembly and the second adjustment assembly are removed, and the gun housing is welded to the first positioning member, and the first positioning member is welded to the second positioning member;

[0025] removing the adjustment ring and placing the anode on the second positioning member to form a prefabricated part;

[0026] The preform is mounted on the base, and the anode is driven to move in the radial direction by the second adjustment assembly to adjust the concentricity, the angle in the horizontal plane, the parallelism and the height difference between the anode and the focusing electrode;

[0027] The anode is welded to the second positioning piece to complete the assembly of the anode assembly and the focusing electrode assembly.

[0028] According to the positioning device for positioning the anode assembly and the focusing electrode assembly of the strip-shaped electron injection klystron of the embodiment of the present disclosure, the first adjustment assembly adjustably sets the second positioning member on the first positioning member, and the adjustment ring is set at the upper end of the second positioning member instead of the anode. The first adjustment assembly drives the adjustment ring to move in the axial direction to adjust the parallelism and height difference between the adjustment ring and the focusing electrode, thereby determining the position of the first positioning member relative to the gun housing. The second adjustment assembly drives the second positioning member to move in the radial direction relative to the gun housing to adjust the concentricity between the first axis where the adjustment ring is located and the second axis where the focusing electrode is located, and the relative position between the second positioning member and the first positioning member is determined by the adjustment ring, and the positioning of the anode and the focusing electrode assembly is achieved by the adjustment ring. In this way, a higher assembly accuracy of the anode and the focusing electrode can be achieved under the premise that the manufacturing accuracy of the gun housing and the auxiliary positioning member is difficult to improve and the matching error is large, which helps to improve the quality of the electron injection and enables the strip-shaped electron injection klystron to provide a higher output power, which is of great significance for application scenarios requiring high power output. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and other objects, features and advantages of the present disclosure will become more apparent through the following description of the embodiments of the present disclosure with reference to the accompanying drawings, in which:

[0030] Figure 1 A perspective view of a positioning device according to an embodiment of the present disclosure is schematically shown;

[0031] Figure 2 Schematically shows Figure 1 A top view of the positioning device shown;

[0032] Figure 3 Schematically shows Figure 1 A side view of the positioning device shown;

[0033] Figure 4 Schematically shows Figure 1 A cross-sectional view of the positioning device shown;

[0034] Figure 5 Schematically shows a cross-sectional view of an anode assembly and a focusing electrode assembly after assembly according to an embodiment of the present disclosure;

[0035] Figure 6 A perspective view of a base according to an embodiment of the present disclosure is schematically shown;

[0036] Figure 7 Schematically shows a first perspective stereogram of an adjustment ring according to an embodiment of the present disclosure;

[0037] Figure 8 Schematically shows Figure 7 A second perspective view of the adjustment ring shown;

[0038] Fig. 9 Schematically shows Figure 7 A cross-sectional view of the adjustment ring shown;

[0039] Fig.10 Schematically shows a perspective view of an anode according to an embodiment of the present disclosure;

[0040] Fig.11 Schematically shows Fig.10 a bottom view of the anode shown;

[0041] Fig.12 Schematically shows Fig.10 A side view of the anode shown;

[0042] Fig.13 A perspective view schematically shows a first positioning member according to an embodiment of the present disclosure;

[0043] Fig.14 Schematically shows Fig.13 A radial cross-sectional view of the first positioning member shown;

[0044] Fig.15 A perspective view schematically shows a second positioning member according to an embodiment of the present disclosure;

[0045] Fig.16 Schematically shows Fig.15 A radial cross-sectional view of the second positioning member shown;

[0046] Fig.17 A perspective view schematically shows a focusing pole according to an embodiment of the present disclosure;

[0047] Fig.18 Schematically shows Fig.17 A top view of the focusing pole shown;

[0048] Fig.19 Schematically shows a perspective view of a tray from a first perspective according to an embodiment of the present disclosure;

[0049] Fig. 20 Schematically shows a perspective view of a tray from a second viewing angle according to an embodiment of the present disclosure;

[0050] Fig.21 Schematically shows a perspective view of a protective member according to an embodiment of the present disclosure from a first viewing angle;

[0051] Fig. 22 A perspective view schematically showing a second viewing angle of a protective member according to an embodiment of the present disclosure; and

[0052] Fig.23 The flowchart of the method for assembling the anode assembly and the focusing electrode assembly of the ribbon electron beam klystron according to the embodiment of the present disclosure is schematically shown.

[0053] The following are the descriptions of the reference numerals:

[0054] 1- anode assembly;

[0055] 11-first positioning member; 111-connecting portion; 112-first flange;

[0056] 12- second positioning member;

[0057] 121 - second flange; 122 - third flange; 123 - receiving groove; 124 - fourth flange;

[0058] 13-anode; 131-second annular portion; 132-second protruding portion;

[0059] 2-focusing pole assembly; 21-focusing pole; 211-third wall; 212-fourth wall;

[0060] 3-base; 32-slideway; 33-first through hole; 34-operating hole;

[0061] 4-first adjustment assembly; 41-tray; 411-opening; 412-groove; 42-first driving unit;

[0062] 5-Adjusting ring;

[0063] 51 - first matching hole; 52 - second matching hole; 53 - third matching hole; 54 - first annular portion; 55 - first protruding portion;

[0064] 6- second adjustment component;

[0065] 61-protection member; 611-body; 6111-first wall; 6112-second wall; 6113-observation hole; 612-arc-shaped portion; 6121-threaded hole; 613-bump; 62-second driving unit;

[0066] 7-the third adjustment assembly; 8-the gun housing. DETAILED DESCRIPTION

[0067] In order to make the objectives, technical solutions and advantages of the present disclosure more clearly understood, the present disclosure is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0068] The terms used herein are only for describing specific embodiments and are not intended to limit the present disclosure. The terms "comprise", "include", etc. used herein indicate the existence of features, steps, operations and / or components, but do not exclude the existence or addition of one or more other features, steps, operations or components.

[0069] All terms used herein, including technical and scientific terms, have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification, and should not be interpreted in an idealized or overly rigid manner.

[0070] When using expressions such as "at least one of A, B, and C, etc.", it should generally be interpreted as the meaning of the expression generally understood by those skilled in the art. For example, "a system having at least one of A, B, and C" should include but not be limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, C, etc. When using expressions such as "at least one of A, B, or C, etc.", it should generally be interpreted as the meaning of the expression generally understood by those skilled in the art. For example, "a system having at least one of A, B, or C" should include but not be limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, C, etc.

[0071] It should also be noted that the directional terms mentioned in the embodiments, such as "upper", "lower", "front", "back", "left", "right", etc., are only reference directions of the drawings and are not intended to limit the scope of protection of the present disclosure. Throughout the drawings, the same elements are represented by the same or similar reference numerals. Conventional structures or configurations will be omitted when they may cause confusion in the understanding of the present disclosure.

[0072] In the process of realizing the present disclosure, it is found that the electron gun of the ribbon-shaped electron beam klystron adopts an electron beam with a rectangular or elliptical cross section, and this design makes the structure of the electron gun more complicated than that of the traditional circular electron beam. The shapes and positions of the cathode, focusing electrode and anode components need to be precisely designed to ensure the stable formation and transmission of the ribbon-shaped electron beam.

[0073] The electron gun of the ribbon klystron is composed of multiple components, including cathode assembly, focusing electrode, anode, etc. During the assembly process, the assembly errors of various key dimensions need to be strictly controlled, including the height difference, parallelism, concentricity and angle between the cathode and focusing electrode, as well as the height difference, parallelism, concentricity and angle between the focusing electrode and the anode, to ensure the performance of the electron gun.

[0074] During the assembly process, the cathode and focusing electrode are assembled because the space is open, the relative position can be easily detected, and the insulation requirements of the two are not large, generally within 3 kV, and the position tolerance of the support structure is good. However, the assembly of the anode and focusing electrode is difficult to achieve high-precision assembly because the anode hole is small. After the anode is covered, the focusing electrode as a reference cannot be directly measured, and the insulation requirements are high, generally above 20 kV, and the position tolerance of the support structure is poor. In addition, welding and sealing treatments are required between the components in the electron gun to ensure the sealing and stability of the electron gun. The welding process requires strict control of parameters such as welding temperature, welding time and welding quality to avoid welding defects and leakage. This places high demands on the assembly process.

[0075] Traditional assembly methods generally design relatively strict tolerances and use manual adjustments to ensure the relative positions of parts. However, this method of assembly has low efficiency and is difficult to fully guarantee accuracy.

[0076] In related technologies, in order to ensure that a sufficiently high proportion of electrons pass through the high-frequency components and reach the collector, a lower filling ratio design is adopted, such as less than 50%. This loses the characteristic impedance of the injection-wave interaction to a certain extent, limiting the output of the microwave power of the klystron.

[0077] At the same time, there are also designs that use a higher filling ratio. However, without disruptive innovations in the centering technology, it is inevitable that a higher proportion of electrons will hit the inner wall of the high-frequency cavity, resulting in greater air discharge and heat dissipation, making it difficult to guarantee working time, and only being able to output power in the microsecond range.

[0078] Figure 1 A perspective view schematically shows a positioning device according to an embodiment of the present disclosure, Figure 2 Schematically shows Figure 1 A top view of the positioning device shown, Figure 3 Schematically shows Figure 1 A side view of the positioning device shown, Figure 4 Schematically shows Figure 1 A cross-sectional view of the positioning device shown.

[0079] As one aspect of the embodiment of the present disclosure, a positioning device is provided for positioning an anode assembly 1 and a focusing electrode assembly 2 of a strip electron beam klystron. The anode assembly 1 includes a first positioning member 11, a second positioning member 12 and an anode 13, such as Figures 1 to 4 As shown, the positioning device includes a base 3, a first adjustment component 4, an adjustment ring 5 ( Figure 4 The base 3 is formed with an upper opening 411, and the gun housing 8 of the strip-shaped electronic injection klystron is detachably mounted in the housing space; wherein the focusing electrode assembly 2 is mounted on the gun housing 8, and the first positioning member 11 is adjustably arranged on the gun housing 8 along the axial direction of the gun housing 8. The first adjustment assembly 4 is mounted on the base 3, and is suitable for adjusting the second positioning member 12 to be adjustably arranged on the first positioning member 11. The adjustment ring 5 replaces the anode 13 and is arranged at the upper end of the second positioning member 12. The first adjustment assembly 4 is also suitable for driving the adjustment ring 5 to move in the axial direction, adjusting the parallelism between the adjustment ring 5 and the focusing electrode 21 of the focusing electrode assembly 2, and adjusting the height difference between the adjustment ring 5 and the focusing electrode 21, so as to locate the relative position between the first positioning member 11 and the gun housing 8 in the axial direction. The second adjustment component 6 is suitable for driving the second positioning member 12 to move radially relative to the gun housing 8 in the gun housing 8, so as to adjust the concentricity of the first axis where the adjustment ring 5 is located and the second axis where the focusing electrode 21 is located, and adjust the angle between the adjustment ring 5 and the focusing electrode 21 in the horizontal plane, locate the relative position between the second positioning member 12 and the first positioning member 11, and realize the positioning of the anode assembly 1 and the focusing electrode assembly 2.

[0080] According to the positioning device of the anode and the focusing electrode of the strip-shaped electronic injection klystron of the embodiment of the present disclosure, the first adjustment component 4 adjustably sets the second positioning member 12 on the first positioning member 11, and the adjustment ring 5 is set at the upper end of the second positioning member 12 instead of the anode 13. The first adjustment component 4 drives the adjustment ring 5 to move in the axial direction to adjust the parallelism and height difference between the adjustment ring 5 and the focusing electrode 2, thereby determining the position of the first positioning member 11 relative to the gun housing 8. The second adjustment component 6 drives the second positioning member 12 to translate and rotate in the radial direction relative to the gun housing 8, adjusts the concentricity between the first axis where the adjustment ring 5 is located and the second axis where the focusing electrode 2 is located, determines the relative position between the second positioning member 12 and the first positioning member 11 by using the adjustment ring 5, and realizes the positioning of the anode 13 and the focusing electrode assembly 2 by using the adjustment ring 5. In this way, under the premise that the manufacturing accuracy of the gun housing 8 and the auxiliary positioning parts is difficult to improve and the matching error is large, a higher assembly accuracy of the anode 13 and the focusing electrode can be achieved, which helps to improve the quality of the electron injection and enable the strip electron injection klystron to provide a higher output power, which is of great significance for application scenarios that require high power output.

[0081] According to the embodiments of the present disclosure, the focusing electrode assembly 2 may be pre-welded to the gun housing 8 , and there may be no strict relative position requirement between the focusing electrode assembly 2 and the gun housing 8 .

[0082] According to the embodiment of the present disclosure, the anode 13 is positioned with the focusing electrode through the adjustment ring 5 , the second positioning member 12 and the first positioning member 11 .

[0083] According to the embodiment of the present disclosure, the second positioning member 12 is freely slidably matched with the gun housing 8 in the axial direction, and the second positioning member 12 is freely slidably matched with the first positioning member 11 in the radial direction, so that the height difference, parallelism, concentricity and angle between the anode 13 and the focusing electrode can be flexibly adjusted through the positioning device provided by the present disclosure.

[0084] In an illustrative embodiment, the ribbon electronic beam klystron may be a short millimeter wave ribbon electronic beam klystron.

[0085] According to the embodiments of the present disclosure, the anode 13 and the focusing electrode are not directly connected, and the positioning of the anode 13 and the focusing electrode is achieved by the first positioning member 11 and the second positioning member 12. The cooperation between the first positioning member 11 and the second positioning member 12 allows free sliding in the axial and radial directions, so the distance between the anode 13 and the focusing electrode can be flexibly adjusted according to design requirements.

[0086] Figure 5 A cross-sectional view of an assembled anode assembly and a focusing electrode assembly according to an embodiment of the present disclosure is schematically shown.

[0087] After the first positioning member 11 and the gun housing 8 and the second positioning member 12 and the first positioning member 11 are positioned by the adjusting ring 5, a preliminary fixation is performed. After the preliminary fixation, the adjusting ring 5 is taken out and the anode 13 is installed on the second positioning member 12 to achieve the following Figure 5 The positioning device can then be used again to further fine-tune the relative position between the anode 13 and the focusing electrode 21, thereby improving the assembly accuracy between the anode 13 and the focusing electrode 21.

[0088] Figure 6 A perspective view of a base according to an embodiment of the present disclosure is schematically shown.

[0089] According to the embodiments of the present disclosure, Figure 1 and Figure 6 As shown, the gun housing 8 is detachably mounted on the bottom wall of the base 3 by a plurality of bolts.

[0090] In an illustrative embodiment, Figure 4 and Figure 6 As shown, two through holes can be provided on the bottom wall, and two bolts are passed through the two through holes respectively to fix the gun housing 8 in the accommodating space in the axial direction. A plurality of (for example, 6) first through holes 33 with threads are evenly provided on the side wall of the base 3 along the circumferential direction, so that the gun housing 8 can be fixed in the radial direction by bolts threadedly mating with the first through holes 33.

[0091] According to the embodiments of the present disclosure, Figure 1 , Figure 2 , Figure 4 and Figure 6 As shown, a plurality of operation holes 34 are provided in the middle of the side wall of the base 3, so as to pre-fix the gun housing 8 and the first positioning member 11, and the first positioning member 11 and the second positioning member 12 respectively through the operation holes 34. The pre-fixing method may be local welding or spot welding.

[0092] In an illustrative embodiment, the base 3 is configured as a cylinder. The upper and lower ends of the base 3 may both have openings 411. The opening 411 at the lower end is smaller than the inner diameter of the base 3, so that the gun housing 8 can be fixed by the bottom wall of the base 3 and the bolts.

[0093] Figure 7 A schematic diagram shows a first perspective stereogram of an adjustment ring according to an embodiment of the present disclosure, Figure 8 Schematically shows Figure 7 A second perspective view of the adjustment ring shown, Fig. 9 Schematically shows Figure 7 A cross-sectional view of the adjustment ring is shown, Fig.10 Schematically shows a three-dimensional view of an anode according to an embodiment of the present disclosure, Fig.11 Schematically shows Fig.10A bottom view of the anode is shown. Fig.12 Schematically shows Fig.10 A side view of the anode is shown.

[0094] According to the embodiments of the present disclosure, Figures 7 to 12 As shown, the shape of the adjustment ring 5 is similar to the shape of the anode 13 to be mounted.

[0095] According to the embodiments of the present disclosure, Figures 7 to 9 As shown, the adjusting ring 5 includes a first annular portion 54 and a first protruding portion 55 extending downward from the first annular portion 54 .

[0096] In an illustrative embodiment, Figures 7 to 9 As shown, the adjustment ring 5 forms a first matching hole 51 extending downward and matching with the anode 13 to be assembled, two elongated second matching holes 52 and four third matching holes 53 .

[0097] like Figures 10 to 12 As shown, the anode 13 includes a second annular portion 131 and a second protruding portion 132 extending downward from the second annular portion 131 .

[0098] In such an embodiment, the height of the first protrusion 55 may be less than or equal to the height of the second protrusion 132 .

[0099] In such an embodiment, the thickness of the first annular portion 54 is the same as the thickness of the second annular portion 131 .

[0100] According to an embodiment of the present disclosure, the fitting clearance between the anode adjustment ring 5 and the second positioning member 12 is smaller than the fitting clearance between the anode 13 and the second positioning member 12 .

[0101] According to the embodiment of the present disclosure, the adjustment ring 5 and the second positioning member 12 are tightly slidably matched, so as to quickly and stably adjust the relative position of the second positioning member 12 and the focusing pole.

[0102] According to the embodiment of the present disclosure, after the adjustment ring 5 completes the positioning and adjustment of the second positioning member 12, it is removed from the second positioning member 12, and the space on the second positioning member 12 is replaced by the anode 13. The anode 13 and the second positioning member 12 are loosely matched, so that the deformation after the anode 13 and the second positioning member 12 are sealed and welded can be further compensated by the process of laser welding the anode 13, thereby achieving a higher assembly accuracy of the anode 13 and the focusing electrode.

[0103] In the process of implementing the present disclosure, it was found that the welding between the first positioning member 11 and the gun housing 8 and between the first positioning member 11 and the second positioning member 12 are all airtight welding, with large heat input and large welding deformation. In order to achieve higher assembly accuracy, such as 0.01-0.02mm, it is necessary to adjust the position of the focusing electrode and the anode 13 for the second time, and finally fix them by laser welding or cold welding with small deformation.

[0104] According to the embodiment of the present disclosure, the adjustment ring 5 has a similar structure to the anode 13. The adjustment ring 5 and the second positioning member 12 are closely matched, such as a matching clearance of 0.02-0.05 mm; the anode 13 and the second positioning member 12 are loosely matched, such as 0.2-0.5 mm. In this way, after the adjustment ring 5 is removed and the anode 13 is assembled to the second positioning member 12, the position between the anode 13 and the focusing electrode can be adjusted for a second time to improve the assembly accuracy.

[0105] Fig.13 A perspective view schematically shows a first positioning member according to an embodiment of the present disclosure, Fig.14 Schematically shows Fig.13 A radial cross-sectional view of the first positioning member is shown.

[0106] In an illustrative embodiment, Fig.13 and Fig.14 As shown, the first positioning member 11 is constructed in a tubular shape, and the inner wall of the lower portion of the first positioning member 11 extends outwardly in the radial direction, so that a step is formed between the inner wall of the upper portion and the inner wall of the lower portion of the first positioning member 11, so that the first positioning member 11 can be slidably placed on the top end of the gun housing 8 in the height direction.

[0107] In such an embodiment, the upper portion of the first positioning member 11 extends radially inward to form a connecting portion 111. The top end of the connecting portion 111 extends radially outward to form a circle of first flanges 112.

[0108] Fig.15 A perspective view schematically shows a second positioning member according to an embodiment of the present disclosure, Fig.16 Schematically shows Fig.15 A radial cross-sectional view of the second positioning member is shown.

[0109] like Fig.15 and Fig.16As shown, the cross section of the second positioning member 12 in the radial direction is a racetrack shape, and the upper and lower ends of the second positioning member 12 extend radially outward to form a second flange 121 and a third flange 122. The third flange 122 located at the lower end of the second positioning member 12 is arranged on the first flange 112 at the top end of the first positioning member 11, and can move radially relative to the first flange 112. The surface of the second flange 121 located at the upper end of the second positioning member 12 extends downward to form a receiving groove 123, and the receiving groove 123 is used to receive the first annular portion 54 of the adjustment ring 5 or the second annular portion 131 of the anode 13.

[0110] The top end of the second flange extends radially outward to form a fourth flange 124 , and the fourth flange is matched with the groove 412 on the tray.

[0111] Fig.17 Schematically shows a stereogram of a focusing pole according to an embodiment of the present disclosure, Fig.18 Schematically shows Fig.17 A top view of the focusing pole is shown.

[0112] like Fig.17 and Fig.18 As shown, the cross section of the focusing pole 21 in the radial direction is a racetrack shape, having two third walls 211 on the long sides and two fourth walls 212 on the short sides.

[0113] In an exemplary embodiment, the parallelism between the adjustment ring 5 and the focusing electrode 21 can be measured by measuring the parallelism between the upper surface of the adjustment ring 5 and the upper surface of the focusing electrode 21. The adjustment ring 5 can be approximately parallel to the focusing electrode 21 through the first adjustment component.

[0114] The height difference between the adjustment ring 5 and the focusing electrode 21 can be measured by measuring the height difference between the upper surface of the adjustment ring 5 and the upper surface of the focusing electrode. The height difference needs to meet the design requirements of the height difference between the anode 13 and the focusing electrode of the strip electron beam klystron.

[0115] The concentricity between the adjustment ring 5 and the focusing pole 21 can be measured by measuring the concentricity between the axis of the adjustment ring 5 and the central axis of the focusing pole.

[0116] The angle between the adjustment ring 5 and the focusing electrode 21 can be used to measure the angle between the fourth wall 212 and the second wall 6112 in the horizontal plane. Through the second adjustment component, the adjustment ring 5 and the focusing electrode 21 can be made approximately concentric, and the angle meets the design value.

[0117] Fig.19 A perspective view of a tray according to an embodiment of the present disclosure is schematically shown in the first perspective. Fig. 20 A perspective view of a tray from a second viewing angle according to an embodiment of the present disclosure is schematically shown.

[0118] According to the embodiments of the present disclosure, Figure 1 As shown, the side wall of the upper part of the base is formed with two slide grooves 32 arranged opposite to each other at the radial ends of the side wall. Figure 1 , Fig.19 and Fig. 20 As shown, the first adjustment assembly 4 includes a tray 41 and a first drive unit 42. The tray 41 has an opening 411, through which the connecting wall between the two slide grooves 32 is passed, so that the tray 41 is inserted into the two slide grooves 32, so that the tray 41 lifts the upper end of the second positioning member 12, wherein the height of the slide groove 32 is greater than the thickness of the tray 41. The first drive unit 42 is installed on the side wall, and is suitable for adjusting the position of the edge of the tray 41 in the axial direction, thereby adjusting the parallelism and height difference between the upper surface and the first surface.

[0119] According to an embodiment of the present disclosure, after the gun housing 8 equipped with the focusing electrode assembly 2 is loaded into the accommodating space, the first positioning member 11 and the second positioning member 12 are placed in sequence, and the tray 41 is inserted from the slide groove 32 on the side wall of the base 3, falls on the first driving unit 42, and is supported by the first driving unit 42, and the tray 41 supports the second positioning member 12.

[0120] According to an embodiment of the present disclosure, the first driving unit 42 may include a plurality of micrometer heads, each of which is configured to drive the edge of the tray 41 to move in the height direction.

[0121] In an illustrative embodiment, Figure 1 As shown, the first driving unit 42 includes four micrometer heads, all of which move in the height direction and are used to support the tray 41 to drive the edge of the tray 41 to move in the height direction to adjust the position of the adjustment ring 5.

[0122] According to an embodiment of the present disclosure, the surface of the tray away from the first adjustment unit is recessed downward to form a groove 412, and the upper edge of the second positioning member 12 is matched with the groove 412 in a concave-convex manner to allow the second positioning member 12 to rotate in the groove 412 under the drive of the second adjustment component 6 to adjust the angle between the adjustment ring 5 and the focusing pole in a first plane parallel to the horizontal plane; and the second positioning member 12 follows the adjustment ring 5 to translate in the first plane to adjust the concentricity between the axis where the adjustment ring 5 is located and the axis where the focusing pole is located.

[0123] Fig.21 A perspective view of a protective member according to an embodiment of the present disclosure is schematically shown in the first perspective. Fig. 22 A perspective view of a protective member at a second viewing angle according to an embodiment of the present disclosure is schematically shown.

[0124] According to the embodiments of the present disclosure, Figure 1 , Fig.21 and Fig. 22 As shown, the second adjustment assembly 6 includes a protective member 61 and a second drive unit 62. The protective member 61 is disposed on the adjustment ring 5 and is relatively stationary in the radial direction with respect to the adjustment ring 5. The second drive unit 62 is mounted on the base 3 and is suitable for driving the protective member 61 in multiple directions so that the protective member 61 drives the adjustment ring 5 to translate and rotate in the radial direction to adjust the concentricity and the angle.

[0125] According to the embodiments of the present disclosure, Figure 1 , Fig.21 and Fig. 22 As shown, the protective member includes a main body 611 and four arc-shaped portions 612. The main body 611 forms an observation hole 6113 extending in the axial direction, and the two first walls 6111 located on the opposite sides of the observation hole 6113 are configured to be tapered, so that at least one of the first walls 6111 is driven by the second driving unit 62, so that the protective member 61 is pressed against the adjustment ring 5, and the protective member 61 drives the second positioning member 12 to move in the radial direction. The four arc-shaped portions 612 (respectively arranged on the intersection of the two first walls 6111 and the two second walls 6112 connecting the two first walls 6111) are driven by the second driving unit 62, so that the protective member 61 rotates, and pushes the two adjacent arc-shaped portions 612 to move in the second direction toward the other two arc-shaped portions 612.

[0126] It is understandable that the number of the arc-shaped portions 612 may be at least two.

[0127] In such an embodiment, the second driving unit 62 is further configured to drive the second wall 6112 to move toward a third direction opposite to the second direction.

[0128] In an exemplary embodiment, the second driving unit 62 includes five differential heads. The five differential heads apply pressure to the protective member 61 in a certain direction to complete quantitative precision adjustment. The upper part of the base 3 has five through holes for fixing the differential heads.

[0129] In an illustrative embodiment, the two short sides of the protective member 61 (i.e., the first wall 6111) are conical surfaces, and two differential heads respectively press the protective member 61 in a direction perpendicular to the conical surface, thereby pressing down the anode 13 or the adjustment ring 5, and adjusting the concentricity of the axis of the anode 13 or the adjustment ring 5 and the axis of the focusing electrode in the first direction in the first plane. One differential head is arranged in a direction perpendicular to one of the long sides (i.e., the second wall 6112); two differential heads are arranged on two arc-shaped portions 612 on both sides of the other second wall 6112, and are used to adjust the concentricity of the anode 13 or the adjustment ring 5 in the first plane in a second direction perpendicular to the first direction, and to adjust the angle between the anode 13 and the focusing electrode in the first plane.

[0130] In such an embodiment, the two arc-shaped portions 612 cooperate with the two differential heads corresponding to the two arc-shaped portions respectively, so that the anode adjustment ring can rotate in a clockwise or counterclockwise direction.

[0131] According to the embodiment of the present disclosure, by providing the observation hole 6113 , it can be ensured that the characteristic position of the second positioning member 12 can be observed by the video measuring microscope through the observation hole 6113 at any time.

[0132] According to the embodiments of the present disclosure, Fig.21 As shown, the bottom surfaces of the two first walls 6111 extend downward to form protrusions 613. The two protrusions 613 are matched with the second openings 411 on the adjustment ring 5 to limit the radial position and direction of the protective member 61 relative to the adjustment ring 5, so that the adjustment ring 5 can move in the radial direction following the protective member 61.

[0133] According to the embodiments of the present disclosure, Fig.21 and Fig. 22 As shown, the arc portion has a threaded hole 6121 extending downward. The external bolt is threadedly engaged with the arc portion 612, and extends downward through the adjustment ring 5 into the second positioning member 12 to limit the relative position between the second positioning member 12 and the protection member 61 in the radial direction. In this way, the second positioning member 12 can move in the radial direction with the protection member 61, so as to realize the positioning between the second positioning member 12 and the first positioning member 11.

[0134] In the process of implementing the present disclosure, it is found that the focusing electrode is fixed on the gun housing 8, and the gun housing 8 is generally manufactured through multi-layer metal-ceramic sealing, which makes it difficult for the parallelism between the focusing electrode and the horizontal plane to be better than 0.1mm, and it is difficult to meet the assembly accuracy requirements of the strip electronic injection klystron. Traditional methods mostly use secondary processing or screening methods, which have high development costs and long manufacturing cycles; auxiliary structural parts with airtight requirements often form large welding deformation after argon arc welding or laser sealing welding, such as exceeding 0.05mm, which will also cause subsequent assembly difficulties and cannot take into account all the requirements of the strip electronic injection klystron for parallelism, height difference, concentricity and angle.

[0135] According to the embodiments of the present disclosure, Figure 1 As shown, the positioning device further includes a third adjustment component 7. The third adjustment component 7 is installed at the lower part of the base 3, and is suitable for supporting the base 3 and adjusting the parallelism of the focusing electrode relative to the horizontal plane.

[0136] In an exemplary embodiment, the lower portion of the base 3 extends radially outward to form a mounting seat. The third adjustment assembly 7 may include three differential heads, which are respectively arranged in the circumferential direction of the mounting seat.

[0137] In an illustrative embodiment, the mounting seat can be integrally or separately arranged with the base 3. In the case where the mounting seat and the base 3 are separately arranged, the mounting seat can be fixed to the outer wall of the lower part of the base 3 by screws.

[0138] In such an embodiment, after the gun housing 8 is fixed to the base 3, the parallelism between the focusing pole and the horizontal plane can be adjusted to be better than a threshold value (for example, 0.02 mm) by adjusting three micrometer heads with the upper surface of the focusing pole as a reference.

[0139] According to the positioning device for positioning the anode assembly 1 and the focusing electrode assembly 2 of the strip electron injection klystron in the embodiment of the present disclosure, the consistency and repeatability of the assembly of the anode assembly 1 and the focusing electrode assembly 2 can be ensured, so that the assembly of each anode assembly 1 and the focusing electrode assembly 2 meets the design requirements, thereby improving the overall quality of the product. In addition, the positioning device provided in the embodiment of the present disclosure has simple processing of non-standard parts, low cost of standard parts, easy acquisition and replication, and can realize mass production of industrial products, greatly improving production efficiency. Compared with manual manufacturing, it can reduce the manual random operations of workers, reduce labor intensity and skills, and enable workers to focus more on other jobs that require higher skills.

[0140] Fig.23 The flowchart of the method for assembling the anode assembly and the focusing electrode assembly of the ribbon electron beam klystron according to the embodiment of the present disclosure is schematically shown.

[0141] As another aspect of an embodiment of the present disclosure, a method for assembling an anode assembly 1 and a focusing electrode assembly 2 of a strip-shaped electron beam klystron using any of the above-mentioned positioning devices is provided, and the method includes operations S2310 to S2320.

[0142] In operation S2310, a gun housing is installed in a receiving space of the base, wherein the focusing electrode assembly is installed on the gun housing.

[0143] Operation S2311: placing a first positioning member, a second positioning member, and an adjusting ring on the gun housing in sequence.

[0144] Operation S2312: Use the first adjustment assembly to support the second positioning member.

[0145] In operation S2313, the parallelism and height difference between the adjustment ring and the focusing pole of the focusing pole assembly are adjusted by the first adjustment assembly.

[0146] Operation S2314: press the second adjustment assembly against the adjustment ring.

[0147] Operation S2315: driving the adjustment ring to move in the radial direction through the second adjustment assembly to adjust the concentricity and the angle between the adjustment ring and the focusing pole in the horizontal plane.

[0148] In operation S2316, the gun housing and the first positioning member are pre-fixed, and the first positioning member and the second positioning member are pre-fixed.

[0149] Operation S2317: remove the base, the first adjustment assembly, and the second adjustment assembly, weld the gun housing to the first positioning member, and weld the first positioning member to the second positioning member.

[0150] In operation S2318, the adjustment ring is removed and the anode is placed on the second positioning member to form a preform.

[0151] Operation S2319: install the preform on the base, and drive the anode to move in the radial direction through the second adjustment assembly to adjust the concentricity between the anode and the focusing electrode and the angle in the horizontal plane.

[0152] In operation S2320, the anode and the second positioning member are welded to complete the assembly of the anode assembly and the focusing electrode assembly.

[0153] According to an embodiment of the present disclosure, before operation S2313, the method further includes: adjusting the base by a third adjusting component so that the upper surface of the focusing pole is approximately parallel to the horizontal plane within a threshold range.

[0154] According to the embodiment of the present disclosure, after the first positioning member and the second positioning member are welded in sequence, new deformation will occur, and the concentricity and angle between the anode and the focusing electrode can be adjusted by the second adjustment component. The parallelism and height difference between the anode and the focusing electrode can be corrected twice by padding a small amount of leather.

[0155] In an illustrative embodiment, a method for assembling an anode and a focusing electrode of a strip electron beam klystron is provided, the method comprising:

[0156] A positioning device for assembling the anode assembly and the focusing electrode assembly of the ribbon column klystron;

[0157] A gun housing with a focusing electrode-cathode assembly mounted thereon is placed in the base;

[0158] Lock the gun housing and the base with screws, washers and nuts to fix the gun housing relative to the base in the radial direction and the axial direction;

[0159] Taking the upper surface of the focusing electrode as a reference, adjusting the third adjusting component so that the parallelism between the upper surface of the focusing electrode and the horizontal plane is better than a threshold value;

[0160] Measure the concentricity, angle, parallelism and height difference between the focusing pole and the base, and record them as the reference deviation value;

[0161] placing the first positioning member, the second positioning member and the adjusting ring in sequence;

[0162] The first adjusting component is used to support the second positioning member;

[0163] The second adjusting assembly is used to compress the adjusting ring;

[0164] Measure the concentricity, angle, parallelism and height difference between the adjustment ring and the cathode, and compare them with the reference deviation value;

[0165] Adjusting the first adjustment component and the second adjustment component to ensure that the relative position of the anode and the focusing electrode placed on the adjustment ring thereafter meets the coarse adjustment threshold requirement;

[0166] Laser welding or cold welding to pre-fix the first positioning member and the gun housing, and the first positioning member and the second positioning member;

[0167] Remove the base, the first adjustment component and the second adjustment component, and seal the first positioning member and the gun housing, and the first positioning member and the second positioning member by laser welding, argon arc welding or high-frequency brazing;

[0168] Remove the adjustment ring, put in the anode, and use the second adjustment and positioning device to precisely adjust the concentricity, angle, parallelism and height difference between the focusing electrode and the anode;

[0169] After the relative position of the focusing electrode and the anode meets the threshold, the anode and the first positioning member are welded by laser welding.

[0170] The embodiments of the present disclosure are described above. However, these embodiments are only for illustrative purposes and are not intended to limit the scope of the present disclosure. Although the embodiments are described above separately, this does not mean that the measures in the various embodiments cannot be used in combination to advantage. The scope of the present disclosure is defined by the attached claims and their equivalents. Without departing from the scope of the present disclosure, those skilled in the art may make a variety of substitutions and modifications, which should all fall within the scope of the present disclosure.

Claims

1. A positioning device, characterized in that: Used for positioning an anode assembly and a focusing electrode assembly of a strip-shaped electron injection klystron, the anode assembly comprises a first positioning member, a second positioning member and an anode, and the positioning device comprises: A base, forming a receiving space with an upper opening, wherein the gun housing of the strip-shaped electronic injection klystron is detachably mounted in the receiving space; wherein the focusing electrode assembly is mounted on the gun housing, and the first positioning member is adjustably arranged on the gun housing; a first adjustment assembly, mounted on the base, adapted to adjustably position the second positioning member on the first positioning member; an adjusting ring, replacing the anode, disposed at the upper end of the second positioning member, the first adjusting assembly being further adapted to drive the adjusting ring to move in the axial direction, and adjusting the parallelism and height difference between the adjusting ring and the focusing pole of the focusing pole assembly, so as to position the first positioning member in the axial direction; and The second adjustment component is suitable for driving the second positioning member to translate and rotate relative to the gun housing in the radial direction of the gun housing, so as to adjust the concentricity of the first axis where the adjustment ring is located and the second axis where the focusing electrode is located, and adjust the angle between the adjustment ring and the focusing electrode in the horizontal plane, position the first positioning member, and realize the positioning of the anode assembly and the focusing electrode assembly.

2. The positioning device according to claim 1, characterized in that: The side wall of the upper part of the base is formed with two slide grooves arranged opposite to each other at two radial ends of the side wall; The first adjustment component comprises: A tray, wherein the tray has an opening, through which the connecting wall between the two slide grooves is passed, so that the tray is inserted into the two slide grooves, so that the tray lifts the upper end of the second positioning member, wherein the height of the slide groove is greater than the thickness of the tray; and The first driving unit is mounted on the side wall and is adapted to adjust the position of the edge of the tray in the axial direction, thereby adjusting the parallelism and the height difference between the upper surface and the first surface.

3. The positioning device according to claim 2, characterized in that: The surface of the tray away from the first adjustment unit is recessed downward to form a groove, and the upper edge of the second positioning member is concavely matched with the groove to allow the second positioning member to rotate in the groove under the drive of the second adjustment unit, and to allow the second positioning member to translate in the radial direction following the adjustment ring.

4. The positioning device according to claim 1, characterized in that: The second adjustment component includes: A protection member, disposed on the adjusting ring and relatively stationary with the adjusting ring in the radial direction; The second driving unit is installed on the base and is suitable for driving the protective member in multiple directions, so that the protective member drives the adjusting ring to translate and rotate in the radial direction to adjust the concentricity and the angle.

5. The positioning device according to claim 4, characterized in that: The protective member comprises: a main body portion, the main body portion forming an observation hole (6113) extending in the axial direction, and two first walls located on opposite sides of the observation hole being configured to be tapered, so that at least one of the first walls is driven by the second driving unit to press the protective member against the adjusting ring, and the protective member drives the second positioning member to move in the radial direction; Four arc-shaped portions are respectively arranged on the intersection lines of the two first walls and the two second walls connecting the two first walls, so that at least one arc-shaped portion is driven by the second driving unit to make the protective member rotate and push the two adjacent arc-shaped portions to move in the second direction toward the other two arc-shaped portions.

6. The positioning device according to claim 5, characterized in that: The bottom surfaces of the two first walls respectively extend downward to form convex blocks; The two protrusions are matched with the first matching holes on the adjusting ring in a concave-convex manner to limit the position and direction of the protective member relative to the adjusting ring in the radial direction.

7. The positioning device according to claim 5, characterized in that: Each arc portion has a threaded hole extending downward; an external bolt is threadedly coupled to the arc portion and extends downward through the adjustment ring into the second positioning member to limit the relative position between the second positioning member and the protective member in the radial direction.

8. The positioning device according to claim 1, characterized in that: Also includes: The third adjustment component is installed at the lower part of the base, and is suitable for supporting the base and adjusting the parallelism of the focusing pole relative to the horizontal plane.

9. The positioning device according to claim 1, characterized in that: The matching clearance between the adjusting ring and the second positioning member is smaller than the matching clearance between the anode and the anode positioning member.

10. A method for assembling an anode assembly and a focusing electrode assembly of a strip electron beam klystron using a positioning device according to any one of claims 1 to 9, characterized in that: include: Installing the gun housing in the receiving space of the base, wherein the focusing electrode assembly is installed on the gun housing; placing a first positioning member, a second positioning member and an adjusting ring on the gun housing in sequence; Using a first adjustment assembly to support the second positioning member; Adjust the parallelism and height difference between the adjustment ring and the focusing pole of the focusing pole assembly by means of a first adjustment assembly; Press the second adjustment assembly against the adjustment ring; The adjusting ring is driven to move in the radial direction by a second adjusting component to adjust the concentricity and the angle in the horizontal plane between the adjusting ring and the focusing pole; Pre-fixing the gun housing and the first positioning member, and pre-fixing the first positioning member and the second positioning member; The base, the first adjustment assembly and the second adjustment assembly are removed, and the gun housing is welded to the first positioning member, and the first positioning member is welded to the second positioning member; removing the adjustment ring and placing the anode on the second positioning member to form a prefabricated part; The preform is mounted on the base, and the anode is driven to translate and rotate in the radial direction by the second adjustment assembly to adjust the concentricity between the anode and the focusing electrode and the angle in the horizontal plane; The anode is welded to the second positioning piece to complete the assembly of the anode assembly and the focusing electrode assembly.

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