Positioning apparatus and assembly method for the anode and focusing electrodes of a strip-beam electron beam klystron

Abstract

The positioning device of the anode and the focusing electrode of the strip electron beam klystron comprises a base forming a containing space with an upper end opening, a gun shell being detachably installed in the containing space; a first adjusting assembly is installed on the base for adjustably setting a second positioning member on a first positioning member; an adjusting ring is arranged on the upper end of the second positioning member instead of the anode; the first adjusting assembly adjusts the parallelism and the height difference between the adjusting ring and the focusing electrode of the focusing electrode assembly to position the first positioning member in the axial direction; the second adjusting assembly drives the second positioning member to move and rotate relative to the gun shell in the radial direction of the gun shell to adjust the concentricity of the first axis on which the adjusting ring is located and the second axis on which the focusing electrode is located, adjust the included angle of the adjusting ring and the focusing electrode in the horizontal plane, position the second positioning member and the first positioning member, and realize the positioning of the anode assembly and the focusing electrode assembly.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of millimeter wave electro-vacuum devices, and particularly relates to a positioning device and assembly method for anodes and focusing electrodes of a strip-beam klystron. BACKGROUND

[0002] As a core power source of linear accelerators, klystrons are a kind of microwave power devices with complex structures, and are designed to achieve significant amplification of microwave energy. The structure of klystrons is complex, and both the design and manufacture thereof involve high technical challenges. By skillfully using the principle of velocity modulation, high-power klystrons efficiently convert the kinetic energy of an electron beam into microwave radiation energy, and exhibit extraordinary characteristics of high power, high efficiency, high gain and excellent stability, and thus are at the top of the peak of pulse and average power output in microwave vacuum electronic devices.

[0003] Klystron technology has been constantly developing with the leap of particle accelerator technology, the innovation of radar and communication systems, and the continuous progress of vacuum electronic technology. Various types of high-power klystrons have emerged, and the working frequency of high-power klystrons spans the entire microwave frequency band, and further extends to the vast territory of millimeter wave and terahertz wave band, achieving an amazing breakthrough of pulse power up to 200 MW, and average (continuous wave) power reaching megawatt level, which exhibits unparalleled energy conversion capability. Driven by the exploration of high-energy particle acceleration, the upgrade of wideband 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 strip-beam klystron mainly has the following characteristics: on the one hand, the unique shape of the electron beam. The strip-beam klystron adopts a rectangular or elliptical cross-section electron beam, instead of the traditional circular cross-section electron beam. 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, high power output capability. Due to the increase in the cross-sectional area of the electron beam, the strip-beam klystron can obtain higher output power at high operating frequencies, which makes it have a significant advantage in application scenarios requiring high power output.

[0005] However, the electron gun of the strip-beam klystron faces multiple complex and delicate problems in the assembly process, such as the structural design of the electron gun electrode, the machining precision, the brazing precision, and the assembly and welding process of the relative position of the electrodes, etc. These problems result in low assembly precision of the electron gun, thereby affecting the performance of the strip-beam klystron. SUMMARY

[0006] Therefore, the present disclosure provides a positioning device and an assembling method for anode and focusing electrode of a strip-beam klystron, which can improve the assembling accuracy of the anode assembly and the focusing electrode assembly of the strip-beam klystron.

[0007] As an aspect of the embodiments of the present disclosure, a positioning device is provided for positioning an anode assembly and a focusing electrode assembly of a strip-beam klystron, the anode assembly comprising a first positioning member, a second positioning member and an anode, the positioning device comprising a base, a first adjusting assembly, an adjusting ring and a second adjusting assembly. The base forms a receiving space with an open upper end, and a gun shell of the strip-beam klystron is detachably installed in the receiving space; wherein the focusing electrode assembly is installed on the gun shell, and the first positioning member is adjustably arranged on the gun shell. The first adjusting assembly is installed on the base and is adapted to adjustably arrange the second positioning member on the first positioning member. The adjusting ring is arranged at an upper end of the second positioning member instead of the anode, and the first adjusting assembly is further adapted to drive the adjusting ring to move in an axial direction, to adjust parallelism and height difference between the adjusting ring and a focusing electrode of the focusing electrode assembly, so as to position the first positioning member in the axial direction. The second adjusting assembly is adapted to drive the second positioning member to translate and rotate relative to the gun shell in a radial direction of the gun shell, to adjust concentricity between a first axis on which the adjusting ring is located and a second axis on which the focusing electrode is located, and to adjust an included angle between the adjusting ring and the focusing electrode in a horizontal plane, to position the first positioning member and to realize positioning of the anode assembly and the focusing electrode assembly.

[0008] According to the embodiments of the present disclosure, the side wall of the upper portion of the base forms two grooves arranged at opposite ends of the radial direction of the side wall. The first adjusting assembly comprises a tray and a first driving unit. The tray has an opening through which a connecting wall between the two grooves is passed, so that the tray is inserted between the two grooves, and the tray holds the upper end of the second positioning member, wherein the height of the grooves is greater than the thickness of the tray. The first driving unit is installed on the side wall and is adapted to adjust the position of the edge of the tray in the axial direction, so as to adjust the parallelism and the height difference between the upper surface of the adjusting ring and the upper surface of the focusing electrode.

[0009] According to the embodiments of the present disclosure, the surface of the tray away from the first adjusting assembly is concave downward to form a groove, and the upper edge of the second positioning member is matched with the groove in a concave-convex manner, so as to allow the second positioning member to rotate in the groove under the driving of the second adjusting assembly, and to allow the second positioning member to move with the adjusting ring in the radial direction.

[0010] According to an embodiment of the present disclosure, the second adjusting assembly comprises a protection member and a second driving unit. The protection member is arranged on the adjusting ring and is relatively stationary with the adjusting ring in the radial direction. The second driving unit is mounted on the base and is adapted to drive the protection member in multiple directions to drive the adjusting ring to move in the radial direction to adjust the concentricity and the included angle.

[0011] According to an embodiment of the present disclosure, the protection member comprises a body portion and four arc-shaped portions. The body portion forms a viewing hole extending in the axial direction, and two first walls located on opposite sides of the viewing hole are tapered. At least one of the first walls is driven by the second driving unit to press the protection member against the adjusting ring and to drive the second positioning member to move in the radial direction. The four arc-shaped portions are respectively arranged at intersections of the two first walls and two second walls connecting the two first walls. At least one of the arc-shaped portions is driven by the second driving unit to rotate the protection member and to push two adjacent arc-shaped portions to move in a second direction towards the other two arc-shaped portions.

[0012] According to an embodiment of the present disclosure, the bottom surfaces of the two first walls respectively extend downward to form two protrusions. The two protrusions are in a convex-concave fit with first fit holes on the adjusting ring to limit the position and direction of the protection member relative to the adjusting ring in the radial direction.

[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 combined with the arc-shaped portion and extends downward through the adjusting ring into the second positioning member to limit the relative position between the second positioning member and the protection member in the radial direction.

[0014] According to an embodiment of the present disclosure, the positioning device further comprises a third adjusting assembly mounted on a lower portion of the base and adapted to support the base and adjust the parallelism of the focusing pole relative to a horizontal plane.

[0015] According to an embodiment of the present disclosure, the fit clearance between the adjusting ring and the second positioning member is smaller than the fit 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 pole assembly of a strip-shaped electron beam klystron using any of the positioning devices described above is provided, comprising:

[0017] Mounting a gun shell in a receiving space of the base, wherein the focusing pole assembly is mounted on the gun shell;

[0018] Placing the first positioning member, the second positioning member and the adjusting ring on the gun shell in sequence;

[0019] The second positioning member is supported by the first adjusting assembly;

[0020] The parallelism and height difference between the adjusting ring and the focusing pole of the focusing pole assembly are adjusted by the first adjusting assembly;

[0021] The second adjusting assembly is pressed against the adjusting ring;

[0022] The adjusting ring is driven to move in the radial direction by the second adjusting assembly, so as to adjust the concentricity between the adjusting ring and the focusing pole and the included angle in the horizontal plane;

[0023] The gun barrel is pre-fixed with the first positioning member, and the first positioning member is pre-fixed with the second positioning member;

[0024] The base, the first adjusting assembly and the second adjusting assembly are removed, and the gun barrel is welded with the first positioning member, and the first positioning member is welded with the second positioning member;

[0025] The adjusting ring is removed, the anode is placed on the second positioning member, and a prefabricated part is formed;

[0026] The prefabricated part is installed on the base, and the anode is driven to move in the radial direction by the second adjusting assembly, so as to adjust the concentricity between the anode and the focusing pole, the included angle in the horizontal plane, the parallelism and the height difference;

[0027] The anode is welded with the second positioning member, and the assembly of the anode assembly and the focusing pole assembly is completed.

[0028] The positioning device for positioning the anode assembly and the focusing pole assembly of the strip-shaped electron beam klystron according to the embodiments of the present disclosure, the first adjusting assembly adjustably sets the second positioning member on the first positioning member, the adjusting ring is set on the upper end of the second positioning member instead of the anode, the adjusting ring is driven to move in the axial direction by the first adjusting assembly, so as to adjust the parallelism and the height difference between the adjusting ring and the focusing pole, and then determine the position of the first positioning member relative to the gun barrel. The second positioning member is driven to move in the radial direction relative to the gun barrel by the second adjusting assembly, so as to adjust the concentricity between the first axis where the adjusting ring is located and the second axis where the focusing pole is located, determine the relative position between the second positioning member and the first positioning member by the adjusting ring, and realize the positioning of the anode and the focusing pole assembly by the adjusting ring. In this way, under the premise that the manufacturing precision of the gun barrel and the auxiliary positioning member is difficult to improve and the matching error is large, higher assembly precision of the anode and the focusing pole can be realized, which helps to improve the quality of the electron beam and make the strip-shaped electron beam klystron be able to provide higher output power, which is of great significance for application scenarios requiring high power output. BRIEF DESCRIPTION OF DRAWINGS

[0029] The above and other objects, features and advantages of this disclosure will become clearer from the following description of embodiments 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 shown schematically;

[0031] Figure 2 Schematic illustration Figure 1 Top view of the positioning device shown;

[0032] Figure 3 Schematic illustration Figure 1 The side view of the positioning device shown;

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

[0034] Figure 5 A schematic cross-sectional view of the anode assembly and focusing electrode assembly according to an embodiment of the present disclosure is shown.

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

[0036] Figure 7 A first-view perspective view of the adjustment ring according to an embodiment of the present disclosure is schematically shown;

[0037] Figure 8 Schematic illustration Figure 7 The second-view perspective stereoscopic view of the adjustment ring is shown;

[0038] Figure 9 Schematic illustration Figure 7 The cross-sectional view of the adjusting ring is shown;

[0039] Figure 10 A perspective view of an anode according to an embodiment of the present disclosure is schematically shown;

[0040] Figure 11 Schematic illustration Figure 10 The bottom view of the anode shown;

[0041] Figure 12 Schematic illustration Figure 10 The side view of the anode shown;

[0042] Figure 13 A perspective view of a first positioning member according to an embodiment of the present disclosure is shown schematically;

[0043] Figure 14 Schematic illustration Figure 13 The radial cross-sectional view of the first positioning element is shown;

[0044] Figure 15 a perspective view of a second positioning member according to an embodiment of the present disclosure is schematically shown;

[0045] Figure 16 a perspective view of a focusing pole according to an embodiment of the present disclosure is schematically shown; Figure 15 a radial cross-sectional view of the second positioning member shown;

[0046] Figure 17 a perspective view of a focusing pole according to an embodiment of the present disclosure is schematically shown;

[0047] Figure 18 a perspective view of a focusing pole according to an embodiment of the present disclosure is schematically shown; Figure 17 a top view of the focusing pole shown;

[0048] Figure 19 a perspective view of a tray according to an embodiment of the present disclosure is schematically shown;

[0049] Figure 20 a perspective view of a tray according to an embodiment of the present disclosure is schematically shown;

[0050] Figure 21 a perspective view of a protection member according to an embodiment of the present disclosure is schematically shown;

[0051] Figure 22 a perspective view of a protection member according to an embodiment of the present disclosure is schematically shown; and

[0052] Figure 23 a flow chart of a method of assembling an anode assembly and a focusing pole assembly of a strip-shaped electron beam klystron according to an embodiment of the present disclosure is schematically shown.

[0053] The reference signs are explained as follows:

[0054] 1 - anode assembly;

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

[0056] 12 - second positioning member;

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

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

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

[0060] 3 - base; 32 - sliding groove; 33 - first through hole; 34 - operation hole;

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

[0062] 5 - adjusting ring;

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

[0064] 6 - second adjusting assembly;

[0065] 61 - protector; 611 - body portion; 6111 - first wall; 6112 - second wall; 6113 - viewing hole; 612 - arc-shaped portion; 6121 - threaded hole; 613 - protruding block; 62 - second driving unit;

[0066] 7 - third adjusting assembly; 8 - gun shell. DETAILED DESCRIPTION

[0067] In order to make the objectives, technical solutions and advantages of the present disclosure clearer, the present disclosure will be further described in detail below with reference to specific embodiments and with reference to the drawings.

[0068] The terms used herein are merely used to describe specific embodiments, and are not intended to limit the present disclosure. The terms "include", "comprise" and the like used herein indicate the presence of the features, steps, operations and / or components, but do not exclude the presence 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 a person skilled in the art, unless otherwise defined. It should be noted that the terms used herein should be interpreted to have meanings consistent with the context of the present specification, and should not be interpreted in an idealized or overly formal manner.

[0070] In the case of using expressions similar to "at least one of A, B and C, etc.", in general, it should be interpreted as having the meaning commonly understood by a person skilled in the art based on the context in which the expression is used. 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, a system having B alone, a system having C alone, a system having both A and B, a system having both A and C, a system having both B and C, and / or a system having A, B, and C, etc. In the case of using expressions similar to "at least one of A, B, or C, etc.", in general, it should be interpreted as having the meaning commonly understood by a person skilled in the art based on the context in which the expression is used. 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, a system having B alone, a system having C alone, a system having both A and B, a system having both A and C, a system having both B and C, and / or a system having A, B, and C, etc.

[0071] It should be noted that the directional terms mentioned in the embodiments, such as "up", "down", "front", "back", "left", "right", etc., are only the directions of the drawings and are not intended to limit the protection scope of the present disclosure. Throughout the drawings, the same elements are represented by the same or similar reference numerals. When it may cause confusion to the understanding of the present disclosure, the conventional structure or configuration will be omitted.

[0072] In the process of implementing the present disclosure, it is found that the electron gun of the strip beam klystron uses a rectangular or elliptical cross-section electron beam, which makes the structure of the electron gun more complex than that of the traditional circular electron beam. It is necessary to accurately design the shape and position of the cathode, focusing electrode and anode, etc. to ensure the stable formation and transmission of the strip electron beam.

[0073] The electron gun of the strip beam klystron is composed of multiple components, including a cathode assembly, a focusing electrode, an anode, etc. During assembly, the assembly error of each key dimension needs to be strictly controlled, including the height difference, parallelism, concentricity and angle of the cathode-focusing electrode, and the height difference, parallelism, concentricity and angle of the focusing electrode and the anode, to ensure the performance of the electron gun.

[0074] During assembly, the assembly of the cathode and the focusing electrode can be easily detected due to the open space, and the relative position is not required to be high, generally within 3 kV, and the position tolerance of the support structure is good. The assembly of the anode and the focusing electrode is difficult to achieve high-precision assembly because the anode hole is small, the focusing electrode as a reference cannot be directly measured after the anode is covered, and the insulation requirement is higher, generally above 20 kV, the position tolerance of the support structure is poor. Special fixtures and tools need to be used to ensure the accuracy and reliability of the assembly. In addition, the components in the electron gun need to be welded and sealed to ensure the sealing and stability of the electron gun. The welding process needs to strictly control the welding temperature, welding time and welding quality, etc. to avoid welding defects and leakage. This puts high requirements on the assembly process.

[0075] The traditional assembly method generally designs strict tolerances and uses manual adjustment to ensure the relative position of the parts, but this method has low assembly efficiency and the accuracy is difficult to guarantee comprehensively.

[0076] In related technologies, in order to ensure that a high proportion of electrons pass through the high-frequency assembly and reach the collector, a design scheme with a relatively low filling ratio is adopted, such as below 50%, which to some extent loses the characteristic impedance of the beam-wave interaction and limits the output of the microwave power of the klystron.

[0077] At the same time, there are also design schemes with higher filling ratio, but without revolutionary innovation in the middle technology, the electron will inevitably have a higher proportion on the inner wall of the high-frequency cavity, the gas outlet and heat dissipation are larger, the working time is difficult to guarantee, and only microsecond power can be output.

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

[0079] As an aspect of an 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-beam klystron. The anode assembly 1 includes a first positioning member 11, a second positioning member 12 and an anode 13, as shown in Figures 1 to 4 The positioning device includes a base 3, a first adjusting assembly 4, an adjusting ring 5 (not shown in the figure) Figure 4 The base 3 forms a containing space with an upper end opening 411, and a gun shell 8 of the strip-beam klystron is detachably installed in the containing space; wherein the focusing electrode assembly 2 is installed on the gun shell 8, and the first positioning member 11 is adjustably arranged on the gun shell 8 along the axial direction of the gun shell 8. The first adjusting assembly 4 is installed on the base 3 and is adapted to adjustably arrange the second positioning member 12 on the first positioning member 11. The adjusting ring 5 replaces the anode 13 and is arranged at the upper end of the second positioning member 12. The first adjusting assembly 4 is further adapted to drive the adjusting ring 5 to move in the axial direction, adjust the parallelism between the adjusting ring 5 and the focusing electrode 21 of the focusing electrode assembly 2, and adjust the height difference between the adjusting ring 5 and the focusing electrode 21, so as to position the relative position between the first positioning member 11 and the gun shell 8 in the axial direction. The second adjusting assembly 6 is adapted to drive the second positioning member 12 to move in the radial direction of the gun shell 8 relative to the gun shell 8, so as to adjust the concentricity between the first axis on which the adjusting ring 5 is located and the second axis on which the focusing electrode 21 is located, and adjust the included angle between the adjusting ring 5 and the focusing electrode 21 in the horizontal plane, position 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 electron beam klystron provided in the embodiments of the present disclosure, the first adjusting assembly 4 adjustably sets the second positioning member 12 on the first positioning member 11, the adjusting ring 5 is arranged at the upper end of the second positioning member 12 instead of the anode 13, the adjusting ring 5 is driven to move in the axial direction by the first adjusting assembly 4, the parallelism and the height difference between the adjusting ring 5 and the focusing electrode 21 are adjusted, and then the position of the first positioning member 11 relative to the gun shell 8 is determined. The second positioning member 12 is driven to translate and rotate in the radial direction relative to the gun shell 8 by the second adjusting assembly 6, the concentricity between the first axis on which the adjusting ring 5 is arranged and the second axis on which the focusing electrode 21 is arranged is adjusted, the relative position between the second positioning member 12 and the first positioning member 11 is determined by the adjusting ring 5, and the positioning of the anode 13 and the focusing electrode assembly 2 is realized by the adjusting ring 5. In this way, under the premise that the manufacturing precision of the gun shell 8 and the auxiliary positioning member is difficult to improve and the matching error is large, high assembly precision of the anode 13 and the focusing electrode can be realized, which is helpful to improve the quality of the electron beam and enable the strip electron beam klystron to provide higher output power, which is of great significance to application scenarios requiring high power output.

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

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

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

[0084] In an illustrative embodiment, the strip electron beam klystron can be a short millimeter wave strip electron 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 realized by the first positioning member 11 and the second positioning member 12. The cooperation of the first positioning member 11 and the second positioning member 12 allows free sliding in the axial direction and the radial direction, so that the distance between the anode 13 and the focusing electrode can be flexibly adjusted according to the design requirements.

[0086] Figure 5 An illustrative cross-sectional view of the anode assembly and the focusing electrode assembly after assembly according to the embodiments of the present disclosure is shown.

[0087] After the first positioning member 11 is positioned with the gun barrel 8 by adjusting the adjusting ring 5, and the second positioning member 12 is positioned with the first positioning member 11, pre-fixing is performed. After pre-fixing, the adjusting ring 5 is removed, and the anode 13 is installed on the second positioning member 12 to realize the assembly as shown in Figure 5 Further, the relative position between the anode 13 and the focusing pole 21 can be further finely adjusted by using the positioning device again, and the assembly precision between the anode 13 and the focusing pole 21 is improved.

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

[0089] According to an embodiment of the present disclosure, as shown in Figure 1 and Figure 6 The gun barrel 8 is detachably installed on the bottom wall of the base 3 by a plurality of bolts.

[0090] In an illustrative embodiment, as shown in Figure 4 and Figure 6 Two through holes can be provided on the bottom wall, and the gun barrel 8 is fixed in the accommodation space in the axial direction by two bolts respectively penetrating through the two through holes. A plurality of (for example, 6) first through holes 33 with threads are uniformly arranged on the side wall of the base 3 in the circumferential direction, so as to be fixed in the radial direction by the bolts threadedly cooperating with the first through holes 33.

[0091] According to an embodiment of the present disclosure, as shown in Figure 1 , Figure 2 , Figure 4 and Figure 6 A plurality of operation holes 34 are provided in the middle part of the side wall of the base 3, so as to facilitate pre-fixing of the gun barrel 8 with the first positioning member 11, and the first positioning member 11 with the second positioning member 12 through the operation holes 34 respectively. The pre-fixing mode can adopt local welding or spot welding.

[0092] In an illustrative embodiment, the base 3 is configured in a cylindrical shape. The upper end and the lower end of the base 3 can both have openings 411. The opening 411 located at the lower end is smaller than the inner diameter of the base 3, so that the gun barrel 8 can be fixed by cooperating the bottom wall of the base 3 with the bolt.

[0093] Figure 7 A first perspective view of the adjusting ring according to an embodiment of the present disclosure is schematically shown, Figure 8 A second perspective view of the adjusting ring is schematically shown, Figure 7 A cross-sectional view of the adjusting ring is schematically shown, Figure 9 A perspective view of the anode according to an embodiment of the present disclosure is schematically shown, Figure 7 A cross-sectional view of the anode is schematically shown, Figure 10 A perspective view of the anode according to an embodiment of the present disclosure is schematically shown, Figure 11 A cross-sectional view of the anode is schematically shown, Figure 10a side view of the anode shown, Figure 12 schematically shows Figure 10 a side view of the anode shown.

[0094] According to an embodiment of the present disclosure, as Figures 7 to 12 shown, the shape of the adjusting ring 5 is similar to that of the anode 13 to be assembled.

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

[0096] In an exemplary embodiment, as Figures 7 to 9 shown, the adjusting ring 5 forms a first mating hole 51 extending downward and matching the anode 13 to be assembled, two second mating holes 52 in long strip shape and four third mating holes 53.

[0097] As Figures 10 to 12 shown, the anode 13 comprises 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 protruding portion 55 can be less than or equal to the height of the second protruding portion 132.

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

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

[0101] According to an embodiment of the present disclosure, the adjusting ring 5 and the second positioning member 12 are closely fitted to quickly and stably adjust the relative position of the second positioning member 12 and the focusing pole.

[0102] According to an embodiment of the present disclosure, after the adjusting ring 5 completes the positioning and adjustment of the second positioning member 12, it is removed from the second positioning member 12, replacing the space on the second positioning member 12 with the anode 13. The anode 13 and the second positioning member 12 are loosely fitted to compensate for the deformation of the anode 13 and the second positioning member 12 after the sealing welding of the anode 13 and the second positioning member 12, so as to realize higher assembly precision of the anode 13 and the focusing pole.

[0103] In the process of realizing the present disclosure, it is found that the welding between the first positioning member 11 and the gun shell 8 and the welding between the first positioning member 11 and the second positioning member 12 are all gas-tight welding, with large heat input and large welding deformation. In order to realize a higher assembly precision, such as 0.01-0.02mm, the positions of the focusing electrode and the anode 13 need to be adjusted twice, and finally fixed by a small deformation method such as laser welding or cold welding.

[0104] According to an embodiment of the present disclosure, the structure of the adjusting ring 5 is similar to that of the anode 13. Among them, the cooperation between the adjusting ring 5 and the second positioning member 12 is relatively tight, such as a cooperation gap of 0.02-0.05mm; the cooperation between the anode 13 and the second positioning member 12 is relatively loose, such as 0.2-0.5mm. In this way, after the adjusting 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 twice to improve the assembly precision.

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

[0106] In an illustrative embodiment, as shown in Figure 13 and Figure 14 The first positioning member 11 is configured in a tubular shape, the inner wall of the lower part of the first positioning member 11 extends outward in the radial direction, so that the inner wall of the upper part of the first positioning member 11 and the inner wall of the lower part form a step, and the first positioning member 11 can be slidably arranged on the top end of the gun shell 8 in the height direction.

[0107] In such an embodiment, the upper part of the first positioning member 11 extends inward in the radial direction to form a connecting part 111. The top end of the connecting part 111 extends outward in the radial direction to form a ring of first flanges 112.

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

[0109] As shown in Figure 15 and Figure 16As shown, the second positioning member 12 has a runway-shaped cross section in the radial direction, and 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 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 at the upper end of the second positioning member 12 extends downward to form a receiving groove 123 for receiving the first annular portion 54 of the adjusting 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, which is in engagement with the groove 412 on the tray.

[0111] Figure 17 A perspective view of the focusing pole is schematically shown, Figure 18 A perspective view of the focusing pole is schematically shown, Figure 17 A top view of the focusing pole is schematically shown.

[0112] As Figure 17 and Figure 18 As shown, the focusing pole 21 has a runway-shaped cross section in the radial direction, and has two third walls 211 with long sides and two fourth walls 212 with short sides.

[0113] In an exemplary embodiment, the parallelism between the adjusting ring 5 and the focusing pole 21 can be measured by the parallelism between the upper surface of the adjusting ring 5 and the upper surface of the focusing pole 21. By the first adjusting assembly, the adjusting ring 5 can be approximately parallel to the focusing pole 21.

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

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

[0116] The included angle between the adjusting ring 5 and the focusing pole 21 can be measured by the included angle between the fourth wall 212 and the second wall 6112 in the horizontal plane. By the second adjusting assembly, the adjusting ring 5 can be approximately concentric with the focusing pole 21, and the included angle meets the design value.

[0117] Figure 19 A perspective view of the tray is schematically shown, Figure 20 A perspective view of the tray is schematically shown,

[0118] According to an embodiment of the present disclosure, as shown in Figure 1 The upper portion of the base has two chutes 32 arranged opposite at both ends in the radial direction of the side wall. As shown in Figure 1 、 Figure 19 and Figure 20 The first adjusting assembly 4 includes a tray 41 and a first driving unit 42. The tray 41 has an opening 411 through which the connecting wall between the two chutes 32 is passed, so that the tray 41 is inserted between the two chutes 32, and the tray 41 supports the upper end of the second positioning member 12, wherein the height of the chute 32 is greater than the thickness of the tray 41. The first driving 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, so as to adjust the parallelism and height difference between the upper surface of the adjusting ring 5 and the upper surface of the focusing pole 21.

[0119] According to an embodiment of the present disclosure, after the gun shell 8 equipped with the focusing pole assembly 2 is loaded into the containing space, the first positioning member 11 and the second positioning member 12 are sequentially placed, the tray 41 is inserted from the chute 32 on the side wall of the base 3, falls on the first driving unit 42, and supports the tray 41 through 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 can include a plurality of micro dividing heads. Each micro dividing head is configured to drive the edge of the tray 41 to move in the height direction.

[0121] In an illustrative embodiment, as shown in Figure 1 The first driving unit 42 includes four micro dividing 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, so as to adjust the position of the adjusting ring 5.

[0122] According to an embodiment of the present disclosure, the surface of the tray away from the first adjusting assembly is concave downward to form a groove 412, and the upper edge of the second positioning member 12 is in concave-convex cooperation with the groove 412, so as to allow the second positioning member 12 to rotate in the groove 412 under the driving of the second adjusting assembly 6, so as to adjust the included angle between the adjusting ring 5 and the focusing pole in the first plane parallel to the horizontal plane; and allow the second positioning member 12 to follow the adjusting ring 5 to translate in the first plane, so as to adjust the concentricity between the axis on which the adjusting ring 5 is located and the axis on which the focusing pole is located.

[0123] Figure 21 A perspective view of the first view angle of the protection member according to an embodiment of the present disclosure is schematically shown, Figure 22 A perspective view of the second view angle of the protection member according to an embodiment of the present disclosure is schematically shown.

[0124] According to an embodiment of the present disclosure, as shown in Figure 1 、 Figure 21and Figure 22 As shown, the second adjustment assembly 6 includes a protective element 61 and a second drive unit 62. The protective element 61 is disposed on the adjustment ring 5 and is stationary relative to the adjustment ring 5 in the radial direction. The second drive unit 62 is mounted on the base 3 and is adapted to drive the protective element 61 in multiple directions, causing the protective element 61 to drive the adjustment ring 5 to translate and rotate in the radial direction to adjust concentricity and included angle.

[0125] According to embodiments of this disclosure, such as Figure 1 , Figure 21 and Figure 22 As shown, the protective member includes a body portion 611 and four arc-shaped portions 612. The body portion 611 forms an observation hole 6113 extending in the axial direction. Two first walls 6111 located on opposite sides of the observation hole 6113 are constructed in a conical shape so that at least one first wall 6111 is driven by the second drive unit 62, causing the protective member 61 to press against the adjusting ring 5 and causing the protective member 61 to drive the second positioning member 12 to move in the radial direction. The four arc-shaped portions 612 are respectively disposed on the intersection line of the two first walls 6111 and the two second walls 6112 connecting the two first walls 6111, so that at least one arc-shaped portion 612 is driven by the second drive unit 62 to rotate the protective member 61 and push two adjacent arc-shaped portions 612 to move in a second direction toward the other two arc-shaped portions 612.

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

[0127] In such an embodiment, the second drive unit 62 is also used to drive the second wall 6112 to move in a third direction opposite to the second direction.

[0128] In one illustrative embodiment, the second drive unit 62 includes five micrometer heads. Each of the five micrometer heads applies pressure to the protective member 61 in a defined direction to achieve precise quantitative adjustment. The upper part of the base 3 has five through holes for fixing the micrometer heads.

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

[0130] In such an embodiment, the anode adjusting ring rotates in the clockwise or counterclockwise direction by the cooperation of the two micro-differentiation heads corresponding to the two arc-shaped portions 612 respectively.

[0131] According to an 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 is observed by the video measuring microscope through the observation hole 6113 at any time.

[0132] According to an embodiment of the present disclosure, as shown in Figure 21 The bottom surfaces of the two first walls 6111 respectively extend downward to form protrusions 613. The two protrusions 613 are in concave-convex cooperation with the second openings 411 on the adjusting ring 5, so as to limit the radial position and direction of the protection member 61 relative to the adjusting ring 5, and enable the adjusting ring 5 to move in the radial direction together with the protection member 61.

[0133] According to an embodiment of the present disclosure, as shown in Figure 21 and Figure 22 The arc-shaped portion has a threaded hole 6121 extending downward. The external bolt is in threaded cooperation with the arc-shaped portion 612 and extends downward through the adjusting ring 5 into the second positioning member 12, so as 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 together with the protection member 61, and the positioning between the second positioning member 12 and the first positioning member 11 is realized.

[0134] In the process of implementing the present disclosure, it is found that the focusing electrode is fixed on the gun shell 8, which is generally manufactured by multiple layers of metal-ceramic sealing, so that it is difficult to make the parallelism between the focusing electrode and the horizontal plane better than 0.1 mm, which cannot meet the assembly accuracy requirements of the strip electron beam klystron. The traditional way is to use secondary processing or screening, which has high development cost and long manufacturing period; the auxiliary structural member with air tightness requirement will form a large welding deformation after argon arc welding or laser sealing welding, such as more than 0.05 mm, which will also cause subsequent assembly difficulties, and cannot meet all requirements of the strip electron beam klystron for parallelism, height difference, concentricity and angle.

[0135] According to an embodiment of the present disclosure, as shown in Figure 1 The positioning device further comprises a third adjusting assembly 7. The third adjusting assembly 7 is installed on 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 part of the base 3 extends radially outward to form a mounting seat. The third adjusting assembly 7 can include three micro-differentiation heads arranged in the circumferential direction of the mounting seat.

[0137] In an illustrative embodiment, the mounting seat can be integrated with the base 3 or provided separately. In the case of a separate mounting seat, 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 shell 8 is fixed to the base 3, the parallelism of the focusing pole to the horizontal plane is adjusted to be better than a threshold (for example, 0.02 mm) by adjusting the three micro-adjustment heads based on the upper surface of the focusing pole.

[0139] The positioning device for positioning the anode assembly 1 and the focusing pole assembly 2 of the strip-beam klystron according to the embodiments of the present disclosure can ensure the consistency and repeatability of the assembly of the anode assembly 1 and the focusing pole assembly 2, so that the assembly of each anode assembly 1 and focusing pole assembly 2 meets the design requirements, thereby improving the overall quality of the product. Moreover, the positioning device provided by the embodiments of the present disclosure has simple non-standard part processing and low cost of standard parts, is easy to obtain and replicate, can realize batch production of industrial products, and greatly improves the production efficiency. Compared with manual manufacturing, the positioning device can reduce the random operation of workers, reduce the labor intensity and skill, and enable the workers to focus more on other work that requires higher skills.

[0140] Figure 23 An illustrative flowchart of a method for assembling the anode assembly and the focusing pole assembly of the strip-beam klystron according to the embodiments of the present disclosure is shown.

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

[0142] Operation S2310: The gun shell is installed in the accommodating space of the base, and the focusing pole assembly is installed on the gun shell.

[0143] Operation S2311: The first positioning member, the second positioning member, and the adjusting ring are sequentially placed on the gun shell.

[0144] Operation S2312: The second positioning member is supported by the first adjusting assembly.

[0145] Operation S2313: The parallelism and the height difference between the adjusting ring and the focusing pole of the focusing pole assembly are adjusted by the first adjusting assembly.

[0146] Operation S2314: The second adjusting assembly is pressed against the adjusting ring.

[0147] Operation S2315: The adjusting ring is driven to move in the radial direction by the second adjusting assembly, and the concentricity and the included angle in the horizontal plane between the adjusting ring and the focusing pole are adjusted.

[0148] Operation S2316, pre-fixing the gun shell and the first positioning member, and pre-fixing the first positioning member and the second positioning member.

[0149] Operation S2317, removing the base, the first adjusting assembly and the second adjusting assembly, welding between the gun shell and the first positioning member, and welding between the first positioning member and the second positioning member.

[0150] Operation S2318, removing the adjusting ring, placing the anode on the second positioning member, and forming a prefabricated member.

[0151] Operation S2319, mounting the prefabricated member on the base, and driving the anode to move in the radial direction through the second adjusting assembly to adjust the concentricity between the anode and the focusing pole, and the included angle in the horizontal plane.

[0152] Operation S2320, welding between the anode and the second positioning member, and completing the assembly of the anode assembly and the focusing pole assembly.

[0153] According to the embodiment of the present disclosure, before operation S2313, it further includes: adjusting the base through the third adjusting assembly, 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 sequentially welded, new deformation occurs, and the concentricity and the included angle between the anode and the focusing pole can be adjusted through the second adjusting assembly. The parallelism and the height difference between the anode and the focusing pole can be secondarily corrected by adding a small amount of leather.

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

[0156] A positioning device for positioning an anode assembly and a focusing pole assembly of a strip-beam klystron;

[0157] Placing a gun shell mounted with a focusing pole-cathode assembly in the base;

[0158] Locking the gun shell and the base with screws, washers and nuts, so that the gun shell is fixed relative to the base in the radial direction and the axial direction;

[0159] Taking the upper surface of the focusing pole as a reference, adjusting the third adjusting assembly so that the parallelism of the upper surface of the focusing pole to the horizontal plane is better than a threshold value;

[0160] Measuring the concentricity, the angle, the parallelism and the height difference between the focusing pole and the base, and recording as a reference deviation value;

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

[0162] The first adjusting assembly supports the second positioning member;

[0163] The second adjusting assembly presses the adjusting ring;

[0164] The concentricity, angle, parallelism and height difference of the adjusting ring and the cathode are measured and compared with the reference deviation value;

[0165] The first adjusting assembly and the second adjusting assembly are adjusted to ensure that the relative position of the anode placed on the adjusting ring and the focusing electrode meets the coarse adjustment threshold requirement;

[0166] The first positioning member and the gun shell are pre-fixed by laser welding or cold welding, and the first positioning member and the second positioning member are fixed;

[0167] The base, the first adjusting assembly and the second adjusting assembly are removed, and the first positioning member and the gun shell, and the first positioning member and the second positioning member are sealed by laser welding, argon arc welding or high-frequency brazing;

[0168] The adjusting ring is removed, the anode is placed, and the concentricity, angle, parallelism and height difference of the focusing electrode and the anode are precisely adjusted by the second adjusting positioning device;

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

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

Claims

1. A positioning device, characterized in that, For positioning the anode assembly and focusing electrode assembly of the strip-shaped electron velocity converter, the anode assembly includes a first positioning element, a second positioning element, and an anode, and the positioning device includes: The base forms a receiving space with an opening at the top, and the gun housing of the strip-shaped electronic injection rate control tube is detachably installed in the receiving space; wherein, the focusing electrode assembly is installed on the gun housing, and the first positioning member is adjustablely disposed on the gun housing; A first adjustment component, mounted on the base, is adapted to adjustably position the second positioning element on the first positioning element; An adjusting ring, replacing the anode, is disposed at the upper end of the second positioning member. The first adjusting assembly is also adapted to drive the adjusting ring to move in the axial direction, adjusting the parallelism and height difference between the adjusting ring and the focusing electrode of the focusing electrode assembly, so as to position the first positioning member in the axial direction; and The second adjustment component is adapted to drive 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 to adjust the angle between the adjustment ring and the focusing electrode in the horizontal plane, to position the first positioning member, and to realize the positioning of the anode assembly and the focusing electrode assembly.

2. The positioning device according to claim 1, characterized in that, The upper sidewall of the base has two grooves arranged opposite each other at both ends in the radial direction. The first adjustment component includes: A tray having an opening through which a connecting wall between two grooves passes, allowing the tray to be inserted into the two grooves and thus supporting the upper end of the second positioning member, wherein the height of the grooves is greater than the thickness of the tray; and A first drive unit, mounted on the side wall, is adapted to adjust the position of the edge of the tray in the axial direction, thereby adjusting the parallelism and height difference between the upper surface of the adjusting ring and the upper surface of the focusing electrode.

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

4. The positioning device according to claim 1, characterized in that, The second adjustment component includes: A protective element is disposed on the adjusting ring and is stationary relative to the adjusting ring in the radial direction; The second drive unit, mounted on the base, is adapted to drive the protective member in multiple directions, causing the protective member to drive the adjusting ring to translate and rotate in the radial direction to adjust the concentricity and the included angle.

5. The positioning device according to claim 4, characterized in that, The protective component includes: The body portion forms an observation hole (6113) extending along the axial direction. Two first walls located on opposite sides of the observation hole are configured in a conical shape so as to drive at least one of the first walls by the second drive unit, causing the protective member to press against the adjusting ring and causing the protective member to drive the second positioning member to move in the radial direction. Four arc-shaped portions are respectively disposed on the intersection line 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 rotate the protective member and push the two adjacent arc-shaped portions to move in a 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 extend downwards to form protrusions; The two protrusions engage with the first mating hole on the adjusting ring to limit the position and orientation 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 of the arcuate portions has a downwardly extending threaded hole; an external bolt is threaded into the arcuate portion and extends downward through the adjusting 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, installed at the lower part of the base, is adapted to support the base and adjust the parallelism of the focusing electrode relative to the horizontal plane.

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

10. A method for assembling the anode assembly and focusing electrode assembly of a strip-shaped electronic velocity converter using the positioning device according to any one of claims 1-9, characterized in that, include: The gun housing is installed within the receiving space of the base, wherein the focusing electrode assembly is installed on the gun housing; A first positioning element, a second positioning element, and an adjusting ring are sequentially placed on the gun casing. The second positioning element is supported by a first adjustment component; The parallelism and height difference between the adjustment ring and the focusing electrode of the focusing electrode assembly are adjusted by the first adjustment component; Press the second adjusting component against the adjusting ring; The second adjustment component drives the adjustment ring to move in the radial direction, adjusting the concentricity between the adjustment ring and the focusing electrode and the included angle in the horizontal plane. Pre-fixed gun casing and first positioning component, and pre-fixed first positioning component and second positioning component; Remove the base, the first adjustment assembly, and the second adjustment assembly; weld the gun casing to the first positioning component; and weld the first positioning component to the second positioning component. Remove the adjusting ring and place the anode on the second positioning component to form a precast component; The preform is installed on the base, and the anode is driven to translate and rotate in the radial direction by the second adjustment component to adjust the concentricity between the anode and the focusing electrode and the included angle in the horizontal plane. Weld the anode to the second positioning component to complete the assembly of the anode assembly and the focusing electrode assembly.

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