Solder receiving type soldering method for anode assembly

Abstract

A solder receiving type soldering method for an anode assembly (100, 200, 300, 400), relating to the technical field of X-ray tubes. The anode assembly (100, 200, 300, 400) comprises: a body (10), which has a first end (10a) and a second end (10b) opposite each other; an anode target (11), which is arranged at the first end (10a); a first recess (12, 22, 42), which is recessed inward from the outer surface of the body (10) and is annularly arranged around the body (10), the direction in which the first recess (12, 22, 42) is recessed and the direction in which the first end (10a) points to the second end (10b) forming a non-90° angle therebetween; and an anode ring (13), which is sleeved on the body (10), wherein the anode ring (13) comprises a first extending ring (131), and the first extending ring (131) is soldered and fixed to the body (10) in the first recess (12, 22, 42). The method can improve a soldered-sealing effect and enhance the degree of soldering firmness, thus helping to prolong the service lives of X-ray tubes.

Description

Pocket welding method for anode assembly Technical Field The invention relates to the technical field of X-ray tubes, and in particular to a pocket welding method for an anode assembly. Background Art An X-ray tube is a high-voltage, high-vacuum electronic device with an electron emission source. Electrons are emitted from the emitter and accelerated by the high-voltage electric field of tens or hundreds of kilovolts between the cathode and the anode to form an electron beam, which bombards the anode target to produce X-rays. An X-ray tube usually includes a cathode with an emitter, an anode for generating rays and dissipating heat, and a tube shell for insulation and vacuum packaging. Since the tube shell needs to maintain a high vacuum state at all times when the X-ray tube is working, the sealing effect between the anode and the tube shell is crucial. As an important component of the anode, the brazing seal between the anode ring and the anode handle is a key part of the X-ray tube sealing. Generally speaking, the anode handle is oxygen-free copper, the anode ring is Kovar alloy, and the brazing material is usually silver-copper brazing material, and then brazing is performed in a vacuum or hydrogen atmosphere. In the existing conventional welding structure, the welding structure of the anode ring and the anode handle is assembled together in the form of a flat overlap, and a ring-shaped brazing material is placed on the upper part of the anode ring or on the step where the anode ring and the anode handle contact, and a flat sealing method is used for welding. During welding, after heating to the melting point of the solder, the solder melts and fills the gap between the welding surface of the anode ring and the welding surface of the anode handle to achieve a welding sealing effect. The disadvantage of this step-shaped structure is that it requires strict control of process parameters such as brazing temperature and time. Heating must be stopped as soon as the brazing material melts, otherwise it will cause the loss of brazing material and affect the sealing effect. In addition, in order to prevent the brazing material from flowing to the unintended welding surface of the anode ring, causing the so-called "silver penetration" phenomenon and causing chronic leakage of the anode ring, the surface of the anode ring needs to be nickel-plated before welding, and the process is complicated and cumbersome. In addition, this structure is prone to welding stress because the anode handle material at the welding part is too thick. The existing patent (202110402812.9) discloses a self-shielded X-ray tube and a method for making the same.

[0043] The paragraph discloses that "the tail end of the anode head 12 and the anode kovar connector 15 are integrated by silver brazing", and "silver brazing" is a conventional welding method. Please refer to Figure 2 of the existing patent for details, but there is no specific description of the structure and method. Summary of the invention In view of the above-mentioned shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a pocket-type welding method for an anode assembly, which can improve the welding sealing effect of the anode assembly and enhance the welding firmness. In order to solve the above technical problems, the present invention provides a pocket welding method for an anode assembly, comprising the following steps: The step of setting the body is as follows: providing a body in the shape of an axis, so that the axis of the body is set vertically, the body has a first end and a second end opposite to each other, and a first groove is set around the body and is recessed inward from the outer surface of the body. The concave direction of the groove and the direction from the first end to the second end have an angle other than 90°, and the opening direction of the first groove is upward or obliquely upward; a solder densification groove is provided in the first groove and around the body, and is concave inward from the groove side wall of the first groove; Anode target setting step: providing an anode target and fixing the anode target to the first end; Anode ring setting step: providing an anode ring, and sleeve-mounting the anode ring on the body, wherein the anode ring comprises a first extension ring, and at least a portion of the first extension ring extends into the first groove; Pre-assembly step: placing solder in the first groove and the solder densification groove to obtain a pre-assembled part; Welding process step: welding and fixing the first extension ring and the body in the first groove by using the solder to obtain the anode assembly; The step of welding and fixing the first extension ring and the body in the first groove by using the solder comprises: The pre-assembled component is heated in a vacuum environment until the solder is melted, so that the solder is in a molten state in the first groove and the solder densification groove, and the solder flows to the gap between the first extension ring and the first groove under the capillary action and at least fills the bottom of the first groove and a part of the groove cavity of the solder densification groove; After keeping the temperature for a preset period of time, the temperature is lowered in a vacuum environment until the solder is re-solidified. Preferably, the opening of the solder densification groove is connected to the bottom of the first groove. Preferably, the concave direction of the solder densification groove and the direction from the first end to the second end have an included angle of 90°. Preferably, the solder densification groove is recessed linearly or curved toward the axis of the body. Preferably, the first groove includes a bottom wall extending outward from the main body and a first side wall located on the side of the bottom wall away from the main body, and the re-solidified solder is located in the solder densification groove, the first groove, and between the first extension ring and the bottom wall and between the first extension ring and the first side wall. Preferably, the first extension ring includes a first section parallel to the first side wall, and before the preassembly is heated, a non-zero gap is provided between the first section and the first side wall, and after the preassembly is heated, the solder flows to and fills the gap under capillary action. Preferably, the first groove includes a solder storage groove, which is closer to the main body than the gap. Before the preassembly is heated, the solder is accommodated in the solder storage groove. After the preassembly is heated, the solder flows from the solder storage groove toward the gap and the solder densification groove. Preferably, during heating, the surface of the anode ring is directly exposed to the vacuum environment; and / or during heating, the end of the first extension ring extending into the first groove is supported by the bottom wall of the first groove. Preferably, the body comprises a second groove recessed inwardly from the first end, the recessed directions of the first groove and the second groove are the same or opposite, and fixing the anode target to the first end comprises: fixing the anode target to The second groove. Preferably, when the first groove and the second groove are recessed in the same direction, the first end is located above the second end during welding; or when the first groove and the second groove are recessed in opposite directions, the first end is located below the second end during welding. Preferably, the pre-assembly step further comprises: after placing solder in the first groove and the solder densification groove, using an anti-oxidation ring to clamp at the opening of the first groove. Preferably, the solder located in the solder densification groove and the first groove is in one or more of a granular, paste, and ring shape. Preferably, the solder in the solder densification groove has a first ring shape with a circular cross section; the solder between the bottom wall of the first groove and the end face of the anti-oxidation ring has a second ring shape with a rectangular cross section. As described above, the pocket welding method of the anode assembly of the present invention has the following beneficial effects: the first groove can hold granular or strip-shaped solder, and after the solder re-solidifies, the re-solidified solder is difficult to escape from the first groove, thereby enhancing the welding firmness between the main body and the anode ring, and the solder densification groove can make the solder extend in a circuitous manner and eventually form a step structure, thereby enhancing the airtightness between the main body and the anode ring. The beneficial effect of the invention is that the anti-oxidation ring in the first groove fills the gap between the first extension ring and the main body, protecting the anode handle and the part of the first extension ring that contacts the anti-oxidation ring from being oxidized during the subsequent high-temperature process of the X-ray tube in a non-vacuum environment, that is, avoiding the formation of an oxide layer in the first groove. The problem of the oxide layer is solved from the root, so the process of removing the oxide layer in the first groove in the subsequent process of the X-ray tube can be eliminated, avoiding physical damage to the welding structure, and ensuring a better welding sealing effect. In addition, during the use of chemical corrosion methods such as pickling to remove the oxide layer in other areas of the anode handle, even if the corrosive liquid accidentally splashes near the first groove, it will not be able to penetrate into the first groove due to the obstruction of the protective ring, and it will not be able to directly contact the welding point between the first extension ring and the main body. In this way, the welding area between the anode ring and the anode handle is prevented from being corroded and damaged, greatly reducing the risk of gas leakage. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of an anode assembly according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view of the anode ring in FIG. 1 . FIG. 3 is a partial enlarged view of area A in FIG. 1 . FIG. 4 is a flow chart of a method for welding an anode assembly in a pocket type according to a second embodiment of the present invention. FIG. 5 is a schematic diagram of the welding structure of the anode assembly shown in FIG. 1 prepared by the pocket welding method shown in FIG. 4 . FIG. 6 is a partial enlarged view of area B in FIG. 5 . FIG. 7 is a schematic diagram of a welding structure of an anode assembly according to a third embodiment of the present invention. FIG8 is a cross-sectional view of the anode ring in FIG7. FIG. 9 is a partial enlarged view of area C in FIG. 7 . FIG. 10 is a partial schematic diagram of an anode assembly according to a fourth embodiment of the present invention. FIG. 11 is a partial schematic diagram of an anode assembly according to the fifth embodiment of the present invention. FIG. 12 is a cross-sectional view of an anode assembly according to a sixth embodiment of the present invention. FIG. 13 is a partial enlarged view of area D in FIG. 12 . Explanation of component numbers: A anode assembly 100, second groove 101, first outer surface 102, second outer surface 103, body 10, first end 10a, second end 10b, anode target 11, A first groove 12, A bottom wall 121, first side wall 122, solder storage groove 123, A anode ring 13, A first extension ring 131, first section 132, second extension ring 133, connecting ring 134, gap 14, solder 15, solder densification groove 16, anti-oxidation ring 17, B anode assembly 200, B first groove 22, B anode ring 23, C anode ring 33, B first extension ring 331, second section 332, C first groove 42, B bottom wall 421, first step surface 422, second step surface 423. DETAILED DESCRIPTION The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical content disclosed by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content. As mentioned in the background technology, in the anode assembly of the existing X-ray tube, the welding structure of the anode ring and the anode handle are assembled together in the form of relative overlap of the planes, that is, the welding surface of the anode ring and the welding surface of the anode handle are welded against each other. During welding, the solder is sandwiched between the two welding surfaces. Since the welding surface is a plane and usually extends in the horizontal direction, there is a problem that the solder flows uncontrollably after heating and then flows to the unexpected welding surface, affecting the airtight effect, and the pretreatment and welding processes are complicated. The self-shielded X-ray tube disclosed in the existing patent (202110402812.9) is also assembled together in the form of relative overlap and welding of the planes. The full text of the specification of the existing patent only discloses that "the tail end of the anode head 12 and the anode kovar connector 15 are welded together by silver brazing", and "silver brazing" is a conventional welding method. Figure 2 of the existing patent shows The “tail end of the anode head 12” has “two notches” arranged radially symmetrically, and these “two notches” are only for facilitating the positioning and assembly of the “tail end of the anode head 12” and the “anode varable connector 15”. In order to solve the technical problem of poor air tightness of the welding structure of the anode ring and the anode handle mentioned in the background technology, an embodiment of the present invention provides an anode assembly, including: an axial body, the axis of the body is arranged vertically, and the body has a first end and a second end opposite to each other; an anode target, arranged at the first end; a first groove, which is recessed inward from the outer surface of the body and arranged around the body in a circle, the recessed direction of the first groove and the direction of the first end pointing to the second end have an angle of non-90°, and the opening direction of the first groove is positive or oblique upward; a solder densification groove which is recessed inward from the groove side wall of the first groove is arranged in the first groove and around the body in a circle; an anode ring, which is sleeved on the body, and the anode ring includes a first extension ring, and the first extension ring is welded and fixed to the body in the first groove. Solder can be placed in both the first groove and the solder densification groove, and the shape of the solder can be one or more of granular, paste-like, annular ring with a circular cross section, and annular ring with a rectangular cross section. In comparison, the present embodiment forms a circle of first grooves around the outer periphery of the main body, and the first extension ring of the anode ring extends into the first groove for welding and fixing. By reasonably designing the recessed direction of the first groove, the welding structure obtained by assembling the first extension ring into the first groove can use the groove wall of the first groove as a wall, which plays a role in blocking the flow of solder during welding. In this way, the welding sealing effect can be improved, which is beneficial to prolonging the service life of the X-ray tube. More importantly, a solder densification groove that is recessed inward from the groove side wall of the first groove is provided in the first groove and around the main body. The solder densification groove is used to store solder. The solder densification groove can be filled with solder in a molten state, which has a significant technical effect of strengthening the airtightness between the main body and the anode ring and enhancing the welding firmness between the main body and the anode ring after the solder re-solidifies. The anode assembly provided in the embodiment of the present invention also includes a component - an anti-oxidation ring. During welding, the anti-oxidation ring in the first groove fills the gap between the first extension ring and the main body, protecting the anode handle and the part of the first extension ring in contact with the anti-oxidation ring from being oxidized during the subsequent high-temperature process of the X-ray tube in a non-vacuum environment, that is, avoiding the formation of an oxide layer in the first groove. The problem of the oxide layer is solved from the root, so that the process of removing the oxide layer in the first groove in the subsequent process of the X-ray tube can be eliminated, avoiding physical damage to the welding structure, and ensuring a better welding sealing effect. In addition, during the use of chemical corrosion methods such as pickling to remove the oxide layer in other areas of the anode handle, even if the corrosive liquid accidentally splashes near the first groove, it will not be able to penetrate into the first groove due to the obstruction of the protective ring, and it will not be able to directly contact the welding point between the first extension ring and the main body. In this way, the welding area between the anode ring and the anode handle is prevented from being corroded and damaged, greatly reducing the risk of gas leakage. In order to make the above-mentioned purpose, features and beneficial effects of the present invention more clearly understood, the specific embodiments of the present invention are described in detail with reference to the accompanying drawings. Next, the embodiments of the present invention are described in detail with reference to the accompanying drawings. The same reference numerals are used for the same parts in each figure. The embodiments are only examples, and of course, the structures shown in different embodiments can be partially replaced or replaced. In the variant, the description of the matters common to the first embodiment is omitted, and only the differences are described. In particular, the same effects produced by the same structure are no longer mentioned one by one according to each embodiment. FIG. 1 is a cross-sectional view of an anode assembly 100 according to a first embodiment of the present invention. The A anode assembly 100 described in this embodiment can be applied to high-voltage and high-vacuum electronic devices such as X-ray tubes, for example, as an anode of an X-ray tube to generate radiation and dissipate heat. Generally speaking, the outer contour of the A anode assembly 100 can be roughly axial, so the illustrations shown in this embodiment are all exemplarily displayed from the perspective of a cross-sectional view obtained by cutting along the axis x of the columnar A anode assembly 100. In order to more clearly illustrate the technical features of this embodiment, FIG. 1 mainly illustrates the welding structure of the anode assembly A 100 and the components fixed by welding through the welding structure, and further elaborates on the specific structures of the components shown. Specifically, referring to FIG1 , the A anode assembly 100 may include: a body 10 having a first end 10a and a second end 10b opposite to each other. The direction from the first end 10a to the second end 10b is substantially parallel to the axial direction of the A anode assembly 100 (i.e., the extension direction of the axis x). In some embodiments, the body 10 may also be referred to as an anode handle, a casting target, etc. Further, with continued reference to FIG. 1 , the A anode assembly 100 may also include an anode target 11, which is disposed at the first end 10a. In the scenario where the anode target 11 is disposed at the first end 10a, the second end 10b may also be referred to as the tail end of the body 10. In the application scenario where the A anode assembly 100 is applied to an X-ray tube, the electron beam bombards the anode target 11 to generate X-rays. In some embodiments, the body 10 may include a second groove 101 that is recessed inward from the first end 10a, and the anode target 11 may be accommodated in the second groove 101. For example, during preparation, a connecting material (e.g., copper) may be placed in the second groove 101, and the second groove 101 is open in a direction away from the second end 10b to receive the anode target 11, and the anode target 11 placed in the second groove 101 is wrapped by the molten connecting material, so that the anode target 11 is reliably fixed in the second groove 101. Further, with continued reference to FIG. 1 , the A anode assembly 100 may also include an A first groove 12, which is recessed inward from the outer surface of the body 10 and arranged around the body 10 in a circle, and the recessed direction of the A first groove 12 and the direction from the first end 10a to the second end 10b (for example, the extension direction of the axis x) have a non-90° included angle. That is, the A first groove 12 may be arranged along the circumference of the body 10, for example, a circle of grooves may be machined at a portion of the body 10 near the second end 10b to form the A first groove 12. In some embodiments, the recessed direction of the A first groove 12 may be parallel to the axis x (as shown in FIG. 1 ), and accordingly, the diameter of the body 10 near the second end 10b may vary to form a structure similar to a step surface, and the A first groove 12 may be recessed from the step surface to the first end 10a. In some embodiments, the recessed direction of the A first groove 12 and the axis x may have a non-zero non-90° included angle, which may be beneficial for adapting to A anode rings 13 of different shapes. It is sufficient that the opening direction of the first groove 12 is upward or obliquely upward, so that the solder can be held and the molten solder can be prevented from flowing out. For ease of description, the outer surface of the body 10 can be located at the first position of A along the axial direction (for example, the extension direction of the axis x). The portion between the groove 12 and the second end 10b is recorded as the first outer surface 102, and the portion between the first groove 12 and the first end 10a is recorded as the second outer surface 103. Further, along the circumference of the body 10, the diameter of the area enclosed by the first outer surface 102 may be smaller than the diameter of the area enclosed by the second outer surface 103. Further, referring to FIG. 1 and FIG. 2 , the A anode assembly 100 may also include an A anode ring 13, which is sleeved on the body 10. The A anode ring 13 is roughly annular and sleeved on the body 10. The A anode ring 13 is used to connect the body 10 and the tube shell (not shown), and the tube shell cover is arranged on the outer periphery of the body 10 to at least isolate the internal and external vacuum. In some embodiments, the tube shell is made of glass, and accordingly, the A anode ring 13 is made of Kovar alloy (in this case, the A anode ring 13 can also be called Kovar ring), wherein the Kovar alloy includes 4J29 alloy, which has a linear expansion coefficient similar to that of silicon borosilicate hard glass at 20 to 450° C. In some embodiments, the tube shell is made of ceramic material, and accordingly, the A anode ring 13 can be made of Kovar alloy or stainless steel. Further, in conjunction with Figures 1 to 3, the A anode ring 13 may include an A first extension ring 131, and the A first extension ring 131 is welded and fixed to the body 10 in the A first groove 12. For example, the A first extension ring 131 may be in a closed ring shape around the body 10, so that along the circumference of the body 10, the A anode ring 13 is welded and fixed to the A first groove 12 in a circle around the body 10, thereby achieving a reliable airtight connection along the circumference of the body 10. At the same time, a solder densification groove 16 is provided in the first groove 12 of A and around the body 10. The solder densification groove 16 is also one of the more important innovations of this embodiment: the solder densification groove 16 is used to store solder during pre-installation, and can be filled with solder in a molten state. After the solder is re-solidified, it plays a significant technical effect of strengthening the air tightness between the body 10 and the anode ring and enhancing the welding firmness between the body and the anode ring. Further, the opening of the solder densification groove 16 is connected to the bottom of the first groove 12 of A, so that it is easy to be filled with solder in a molten state. The concave direction of the solder densification groove 16 and the direction from the first end to the second end have an angle of 90°, so that after the solder is re-solidified, the re-solidified solder is difficult to detach from the first groove 12 of A, thereby enhancing the welding firmness between the body and the anode ring, and the solder densification groove 16 can make the solder extend circuitously and finally form a step structure, thereby enhancing the air tightness between the body and the anode ring. Furthermore, the solder densification groove is straightly or curvedly recessed toward the axis of the body. In a specific embodiment, the first groove 12 may include a bottom wall 121 extending outward from the body 10 and a pair of side walls respectively located on both sides of the bottom wall 121 along the radial direction of the body 10 . Specifically, one of the pair of side walls can reuse the first outer surface 102, and the other one is recorded as the first side wall 122. That is to say, the first side wall 122 is located on the side of the A bottom wall 121 away from the body 10. The A bottom wall 121, the first outer surface 102 and the first side wall 122 together form an A first groove 12 that surrounds the body 10 along the circumference of the body 10 and opens in a direction away from the A bottom wall 121. In FIG. 1 and FIG. 3, the A first groove 12 is shown as an example to be opened upward according to the perspective of the figure. During welding, the re-solidified solder is located in the solder densification groove, the first groove and the first extension groove. ring and the bottom wall and between the first extension ring and the first side wall. Furthermore, the first groove 12 of A is at least used to limit the flow of solder during soldering. Specifically, the first side wall 122 cooperates with the second outer surface 103 to form a circle of thin-walled wall on the side of the bottom wall 121 of A away from the first outer surface 102. During preparation, the flow of the heated and melted solder in the first groove 12 of A is limited by the thin-walled wall. In some embodiments, the thickness of the first side wall 122 can be set to [0.8 mm, 2 mm], which is conducive to reducing welding stress while ensuring the sealing effect. The thickness can refer to the size of the first side wall 122 in the radial direction of the body 10, for example. In some embodiments, the height of the first side wall 122 can be set to [1.5 mm, 3 mm], which is conducive to reducing welding stress and ensuring sufficient sealing length under appropriate capillary action time to ensure sealing effect. The height can, for example, refer to the dimension of the first side wall 122 in the axial direction of the body 10 (for example, the extension direction of the axis x). In a specific embodiment, the first extension ring 131 may be fixed to the first side wall 122 by welding. Specifically, the first extension ring 131 may include a first section 132 parallel to the first side wall 122 . The first section 132 is annular and located between the first side wall 122 and the first outer surface 102 . Furthermore, the surface of the first section 132 facing the first side wall 122 and the first side wall 122 can be used as welding surfaces. During preparation, solder is filled between the two welding surfaces to weld and fix the A first extension ring 131 and the A first groove 12, thereby achieving welding and fixing between the A anode ring 13 and the body 10. In a specific embodiment, the end of the A first extension ring 131 extending into the A first groove 12 can contact the A bottom wall 121 of the A first groove 12. That is, the A anode ring 13 can be prepared and used in daily life in a state where the A first extension ring 131 is supported on the A bottom wall 121. In this example, the A first extension ring 131 can be welded and fixed to the A bottom wall 121. Specifically, the surface of the first section 132 facing the A bottom wall 121 and the A bottom wall 121 can be used as welding surfaces. During preparation, solder is filled between the two welding surfaces to weld and fix the A first extension ring 131 and the A first groove 12, thereby achieving welding and fixing between the A anode ring 13 and the body 10. In a specific embodiment, the A first extension ring 131 can be welded and fixed to the A bottom wall 121 and the first side wall 122, which is beneficial to improving the connection reliability and sealing effect of the A anode ring 13 and the body 10. In a specific embodiment, during preparation (for example, before welding), after the A anode ring 13 is assembled to the body 10 to form a preassembly, there may be a non-zero gap 14 (as shown in Figure 6) between the first section 132 extending into the A first groove 12 and the first side wall 122, and the gap 14 is used for solder filling. Specifically, the surface of the first section 132 of the pre-assembled component facing the first side wall 122 may not be in contact with the first side wall 122, and there may be a gap 14 between the two welding surfaces, as shown in FIG6. During welding, the solder fills the gap 14 completely under the action of capillary force, and the structure shown in FIG3 is obtained. It should be noted that the process, environment, Due to the limitation of equipment and other factors, it is not ruled out that a small amount of gap 14 may still exist in the finally prepared A anode assembly 100. The existence of a small amount of gap 14 is acceptable without affecting the airtight performance. For example, the gap 14 may be formed in the pre-assembly by appropriately designing the difference between the diameter of the first section 132 and the diameter of the first sidewall 122 . In some embodiments, the specific value of the gap 14 can be taken from [0.05 mm, 0.2 mm], which is conducive to generating sufficient capillary force to ensure full filling and good sealing effect, and prevent air leakage. In a specific embodiment, continuing to refer to Figures 1 to 3 and Figure 6, the first groove 12 of A may include a solder storage groove 123, which is surrounded by the first section 132, the main body 10 and the bottom wall 121 of A, and the solder storage groove 123 is used to temporarily store the solder 15 (as shown in Figure 6). Specifically, the surface of the first section 132 facing the first outer surface 102, the first outer surface 102, and the A bottom wall 121 together form a solder storage groove 123, which is an annular cavity surrounding the first outer surface 102 to hold the solder 15. In some embodiments, the solder 15 can be placed in the solder storage groove 123 in an annular shape. Furthermore, the solder storage groove is closer to the body than the gap. Before the preassembled part is heated, the solder is contained in the solder storage groove. After the preassembled part is heated, the solder flows from the solder storage groove toward the gap and the solder densification groove. Specifically, the solder storage groove 123 may belong to the portion of the annular A first groove 12 that is closer to the body 10, that is, the inner ring portion of the A first groove 12. Thus, the solder 15 is initially contained in the inner ring of the A first groove 12. During the preparation, the heated and melted solder flows toward the outer ring and fills the gap 14 under the capillary action to complete the welding. The solder storage groove 123 disposed inside is conducive to further reducing the possibility of the solder 15 overflowing the A first groove 12, and avoiding the phenomenon of silver penetration caused by the solder spreading on the unexpected welding surface of the A anode ring 13. In some embodiments, the width of the solder storage groove 123 can be set to [1.5 mm, 2.5 mm], which is conducive to using an appropriate amount of expensive solder to achieve a good sealing effect while meeting the solder filling requirements. The width, for example, can refer to the radial dimension of the solder storage groove 123 along the body 10, that is, the distance between the surface of the first section 132 facing the first outer surface 102 and the first outer surface 102. In some embodiments, the diameter of the solder 15 may be in the range of [0.8 mm, 2 mm], where the diameter may refer to, for example, the diameter of the cross section of the solder 15 as shown in FIG. 6 . In some embodiments, the solder storage groove 123 and the gap 14 can be independent. For example, referring to Fig. 6, along the radial direction of the body 10, the solder storage groove 123 and the gap 14 can be located on both sides of the first section 132. After the solder 15 is heated and melted, it enters the gap 14 based on the capillary principle to complete the welding. In a specific embodiment, with continued reference to FIGS. 1 to 3 , the first groove 12 and the second groove 101 may be recessed in opposite directions. Specifically, the first groove 12 may be recessed toward the first end 10a, and the second groove 101 may be recessed toward the second end 10a. End 10b is recessed. In some embodiments, the concave direction of the first groove 12 and the concave direction of the second groove 101 may be parallel. In some embodiments, the concave directions of the two may also have a non-zero angle, as shown in FIG1 . In a specific embodiment, the first groove 12 is closer to the second end 10 b than the first end 10 a. In other words, the first groove 12 can be disposed close to the rear end of the body 10 . In a specific embodiment, with continued reference to Figures 1 and 2, the A anode ring 13 may further include a second extension ring 133, which is used to connect the A first extension ring 131 and the tube shell. For example, one end of the second extension ring 133 is sealed with the tube shell, and the other end opposite to the A first extension ring 131 is integrally formed. Specifically, the second extension ring 133 may be coaxially disposed with the first extension ring 131 . Further, the diameter of the second extension ring 133 is not less than the diameter of the first extension ring 131. FIG. 1 and FIG. 2 are exemplarily shown by taking the diameter of the second extension ring 133 as greater than the diameter of the first extension ring 131, that is, the second extension ring 133 is sleeved on the first extension ring 131. It should be noted that in this example, the diameter of the second extension ring 133 is not less than the diameter of the first extension ring 131, and may be equal to or greater than, or slightly less than. In some embodiments, with continued reference to Figures 1 and 2, the A anode ring 13 may further include a connecting ring 134, which is located between the A first extension ring 131 and the second extension ring 133 to connect the two. Further, the connection between the connecting ring 134 and the A first extension ring 131, and the connection between the connecting ring 134 and the second extension ring 133, may be arc-shaped. In this example, the first extension ring 131 and the second extension ring 133 may be parallel to the first side wall 122, and the connecting ring 134 may be perpendicular to the first side wall 122. The angles between the three rings may be chamfered to achieve a smooth transition. In one example, the second extension ring 133 may be bent radially inward and then bent downward to obtain the connecting ring 134 and the first extension ring 131 in sequence. In some embodiments, when the diameters of the first extension ring 131 and the second extension ring 133 are relatively close, the second extension ring 133 can first extend upward from the first extension ring 131 according to the perspective of FIG. 1, and then cover the body 10 by properly designing the shape of the tube shell. For example, the tube shell is bent outward from one end of the second extension ring 133 away from the first extension ring 131 and then extends downward to cover the body 10. In this example, the connecting ring 134 can be eliminated. In a specific embodiment, the surface of the A anode ring 13 can be directly exposed to the outside. That is, the A anode ring 13 in the A anode assembly 100 of this embodiment does not need to be nickel-plated before welding. As described above, in this embodiment, a circle of A first groove 12 is formed around the outer circumference of the body 10, and the A first extension ring 131 of the A anode ring 13 extends into the A first groove 12 for welding and fixing. By reasonably designing the concave direction of the A first groove 12, the welded structure obtained by the assembly form of the A first extension ring 131 extending into the A first groove 12 can be used. The groove wall (eg, the first side wall 122) of the first groove 12 acts as a wall to block the flow of solder during welding, thereby improving the welding sealing effect and helping to extend the service life of the X-ray tube. Furthermore, the provision of the first groove 12 can not only reduce the loss of the solder 15 during melting, but also help to reduce welding stress and improve the sealing quality. Furthermore, the A anode assembly 100 described in this embodiment is also conducive to reducing the dependence on process parameters, is easy to assemble, and makes it possible to eliminate the nickel plating requirement for the A anode ring 13. FIG4 is a flow chart of a method for welding anode components in a pocket type according to a second embodiment of the present invention. This embodiment can be suitable for manufacturing the anode components 100 shown in FIGS. 1 to 3 above. Therefore, the explanation of the terms involved in this embodiment can refer to the relevant description of the embodiments shown in FIGS. 1 to 3, and will not be repeated here. Specifically, referring to FIG. 4 , the pocket welding method of the anode assembly of the present embodiment may include the following steps: The body setting step S101 is to provide a body in the shape of an axis, so that the axis of the body is arranged vertically, the body has a first end and a second end opposite to each other, a first groove is arranged around the body and is recessed inward from the outer surface of the body, the recessed direction of the first groove and the direction of the first end pointing to the second end have an angle other than 90 degrees, and the opening direction of the first groove is upward or obliquely upward; and a solder densification groove is arranged in the first groove and around the body and is recessed inward from the groove side wall of the first groove; Anode target setting step S102, providing an anode target and fixing the anode target to the first end; Anode ring setting step S103, providing an anode ring, and sleeve-mounting the anode ring on the body, wherein the anode ring comprises a first extension ring, and at least a portion of the first extension ring extends into the first groove; Pre-assembly step S104, placing solder in the first groove and the solder densification groove to obtain a pre-assembled part; Welding process step S105, welding and fixing the first extension ring and the body in the first groove by using the solder to obtain the anode assembly; The step of welding and fixing the first extension ring and the body in the first groove by using the solder comprises: The pre-assembled component is heated in a vacuum environment until the solder is melted, so that the solder is in a molten state in the first groove and the solder densification groove, and the solder flows to the gap between the first extension ring and the first groove under the capillary action and at least fills the bottom of the first groove and a part of the groove cavity of the solder densification groove of the solder densification groove; After keeping the temperature for a preset period of time, the temperature is lowered in a vacuum environment until the solder is re-solidified. The main innovations of the pocket soldering method of the present application are as follows: In the body setting step S101, a first groove is set around the body and is recessed inward from the outer surface of the body, and the opening direction of the first groove is upward or obliquely upward. In this way, the solder in the form of particles, pastes or strips can be held, and during soldering, the first groove can hold the solder in a molten state, restrict the flow direction of the solder and prevent the solder from flowing out. Then, in the first groove and around the The body is provided with a solder densification groove which is recessed inward from the groove side wall of the first groove. The solder densification groove is used to place solder and can be filled with solder in a molten state. Welding process step S105, heating the pre-assembled part in a vacuum environment until the solder melts, so that the solder is in a molten state in the first groove and the solder densification groove, and the solder flows to between the first extension ring and the first groove and at least fills the bottom of the first groove and the entire solder densification groove; after keeping warm for a preset period of time, the temperature is lowered in a vacuum environment until the solder re-solidifies. Since there is also solder in the solder densification groove, after the solder re-solidifies, it is difficult for the re-solidified solder to detach from the first groove 12 of A, thereby enhancing the welding firmness between the body and the anode ring, and the solder densification groove 16 enables the solder to extend circuitously and eventually form a solidified step structure, thereby enhancing the airtightness between the body and the anode ring. The above-mentioned existing patent (202110402812.9) specification does not disclose any technical content about the "annular groove structure at the tail end of the anode head 12", nor does it disclose any technical content about the "two gaps" at the tail end of the anode head 12 for placing solder. Those skilled in the art can only conclude from the existing patent drawings that "the anode var connector 15 is hooked in the gap at the tail end of the anode head 12" just to facilitate the positioning and assembly of the two components, nothing more. As shown in Figures 12 and 13, the pocket-type welding method of the present application has another important innovation: due to the existing welding structure formed by conventional "silver brazing", an oxide layer is easily generated at the silver brazing joint during the high-temperature process of the X-ray tube. If this oxide layer is not cleaned, there is a risk of falling off, which leads to the risk of sparking and damage to the X-ray tube during use. If it is cleaned, the silver brazing joint is often a narrow slit structure, which will lead to difficulties in cleaning, and will cause erosion or physical damage to the brazing sealing area, thereby posing a risk of air leakage. Based on this prior art problem, the pocket-type welding method of the present application needs to introduce a key component: an anti-oxidation ring 17, the material properties and shape of the anti-oxidation ring 17 will not change during the welding process. Specifically, the pre-assembly step also includes: after placing solder in the first groove and the solder densification groove, using an anti-oxidation ring clamped at the opening of the first groove. With such a configuration, the anti-oxidation ring 17 can prevent the formation of an oxide layer at the internal welding of the first groove during the subsequent high-temperature process of the X-ray tube in a non-vacuum environment, thereby preventing erosion or physical damage to the brazing sealing area, thereby eliminating the risk of air leakage in the X-ray tube. In order to make the molten solder flow more smoothly to the gap between the first extension ring and the first groove under the capillary action and at least fill the bottom of the first groove and or a part of the groove cavity of the solder densification groove, the solder located in the solder densification groove can be in the form of particles, paste, a ring with a circular cross section, or a ring with a rectangular cross section. The shape of the solder located in the solder densification groove is preferably a first ring with a circular cross section, and the shape of the solder located between the bottom wall of the first groove and the end face of the anti-oxidation ring is preferably a second ring with a rectangular cross section; the solder with a rectangular cross section is located between the bottom wall of the first groove and the end face of the anti-oxidation ring, and its thickness is usually 0.1-0.3mm. This is more conducive to the formation of the capillary phenomenon of the molten solder. In a specific embodiment, in conjunction with FIG. 1 to FIG. 3, before executing step S101, welding preparation (for example e.g., pre-processing). For example, the main body 10 with the anode target 11 attached thereto and a shielding cover (not shown) connected to the main body 10 and covering the anode target 11 may be subjected to degreasing cleaning, hydrogen burning, electrochemical polishing and post-cleaning drying treatments respectively. For another example, the A anode ring 13 and the solder 15 can be cleaned and then subjected to hydrogen burning treatment. In some embodiments, the anode target 11 may be, for example, a tungsten plate. In some embodiments, the body 10 and the shield can be, for example, oxygen-free copper. In some embodiments, the A anode ring 13 may be, for example, 4J29 Kovar alloy. In some embodiments, the solder 15 may include brazing material, which may be, for example, silver-copper solder, such as Ag72Cu28 solder. In a specific embodiment, the pre-welding assembly is performed by executing step S103 and step S104. Specifically, referring to FIG5, the body 10 with the anode target 11 attached, the shielding cover (not shown) covering the anode target 11, the shielding cover welding solder ring with a diameter of 1 mm (not shown, the diameter may refer to the size of the solder itself), and the A anode ring 13 may be assembled, and the solder 15 with a diameter of 1.5 mm is placed in the solder storage groove 123 to form a welding assembly. The A first groove 12, the solder 15, and the portion of the A first extension ring 131 extending into the A first groove 12 together form a welding structure, as shown in FIG6. Further, in the pre-assembled state shown in FIG. 6 , there is a gap 14 between the first extension ring 131 and the first side wall 122 . In some embodiments, for a tube shell made of glass, the sealing portion between the A-anode ring 13 and the tube shell (eg, the second extension ring 133 ) may be pre-attached with glass frit. In a specific embodiment, step S105 may include the steps of: heating the pre-assembled component in a vacuum environment until the solder melts, so that the solder is in a molten state in the first groove, and allowing the solder to flow between the first extension ring and the first groove and fill the solder densification groove; after keeping warm for a preset period of time, cooling down in a vacuum environment until the solder re-solidifies. For example, the assembled pre-assembly as shown in FIG5 can be placed in a vacuum heating device, and after evacuation, the pre-assembly is heated to 800-840°C by induction heating to melt the solder 15. The temperature is kept for 1-6 minutes until the solder 15 is fully diffused and evenly filled in the welding gap (for example, the gap 14). The pre-assembly is cooled to room temperature under vacuum and then taken out to obtain the A anode assembly 100 as shown in FIG1. In some embodiments, the re-solidified solder 15 may be located between the A first extension ring 131 (eg, the first segment 132 ) and the A bottom wall 121 , and / or between the A first extension ring 131 (eg, the first segment 132 ) and the first side wall 122 . In some embodiments, the solder gap may include a gap 14. Specifically, before the pre-assembled part shown in FIG. 5 is heated, there is a non-zero gap 14 between the first section 132 and the first side wall 122. Further, after the pre-assembled part is heated, the solder 15 The solder flows from the solder reservoir 123 to fill the gap 14 under the capillary action. In some embodiments, the solder storage groove 123 is closer to the body 10 (e.g., the first outer surface 102 of the body 10) than the gap 14. Before the pre-assembled part shown in FIG. 5 is heated, the solder 15 can be accommodated in the solder storage groove 123, as shown in FIG. 6. After the pre-assembled part is heated, the solder 15 flows from the solder storage groove 123 toward the gap 14, and finally forms the structure shown in FIG. 3, that is, at least the first extension ring 131 and the first side wall 122 are welded and fixed. In a specific embodiment, during the heating, the surface of the A anode ring 13 is directly exposed to the vacuum environment. That is, when the welding structure shown in Figures 5 and 6 is used for preparation, the surface of the A anode ring 13 can be free of nickel plating before brazing because there is no silver penetration caused by the brazing material flowing to the unintended welding surface. In a variation, the surface of the A anode ring 13 may be nickel plated first, and then assembled to obtain a pre-assembled part as shown in FIG. 5 , and then step S105 is performed to complete welding. In a specific embodiment, during heating, the end of the A first extension ring 131 extending into the A first groove 12 can be supported on the A bottom wall 121 of the A first groove 12. That is, at least before and during welding, the A first extension ring 131 is supported on the A bottom wall 121. Thus, the A anode ring 13 is reliably supported on the A first groove 12, avoiding unexpected displacement of the relative positions of the components in the pre-assembled part during heating in the vacuum heating device. In a specific embodiment, step S102 may include the step of fixing the anode target 13 in the second groove 101 . In a specific embodiment, with continued reference to FIG. 5 , when the recessed directions of the first groove 12 and the second groove 101 are opposite to each other, during welding, the first end 10 a may be located below the second end 10 b . That is, the pre-assembled part shown in FIG5 can be placed in a vacuum heating device for heating in the posture of the perspective shown in the figure (i.e., the first end 10a is at the bottom and the second end 10b is at the top). Thus, it is ensured that the first groove 12 of A is open upward during heating to confine the molten solder 15 in the first groove 12 of A. In a specific embodiment, the pocket welding method described in this embodiment may further include the steps of: providing a tube shell, and arranging the tube shell cover on the main body; connecting the first extension ring and the tube shell through the second extension ring of the anode ring. Specifically, after obtaining the anode assembly 100 A as shown in FIG. 1 , the tube shell may be further welded to the second extension ring 133 . In some embodiments, the tube shell is made of glass material, and the glass tube shell can be connected to the second extension ring 133 after being sintered. In some embodiments, the tube shell is made of ceramic material, and the sealing surface of the tube shell is ceramic metallized and then brazed with a component made of Kovar or stainless steel. Then, the component made of Kovar or stainless steel is welded to the second extension ring 133. From the above, in this embodiment, a circle A of first grooves 12 is formed around the outer circumference of the body 10, and by reasonably designing the A first groove 12, The concave direction of the groove 12 enables the welding structure obtained by assembling the first extension ring 131 of A into the first groove 12 of A to use the groove wall of the first groove 12 of A as a wall. During the preparation, the wall is provided to block the flow of the solder 15, and prevent the molten solder 15 (for example, brazing material) from flowing to the unintended welding surface of the anode ring 13 of A, causing the so-called "silver penetration" phenomenon and causing chronic leakage. In this way, the welding sealing effect can be improved, which is conducive to extending the service life of the X-ray tube. Furthermore, the anode assembly 100 of this embodiment is simple to assemble during preparation (eg, before welding), and the solder can be easily placed. Furthermore, since the flow of the solder 15 after melting is restricted by the first groove 12 of A, the requirement for controlling the holding time of the solder 15 after melting during welding is low, and the loss of the solder 15 can be better prevented. Furthermore, a sufficiently long holding time is conducive to the solder 15 fully filling the welding gap (for example, the gap 14 between the first extension ring 131 of A and the first groove 12 of A and the solder densification groove 16), and the welding stress at the welding point is small, thereby ensuring the sealing effect of the welding. Furthermore, the welding structure in which the A first extension ring 131 extends into the A first groove 12 can reliably prevent the solder 15 from spreading on the unintended welding surface of the A anode ring 13 (for example, preventing the solder 15 from overflowing the A first groove 12), so the so-called "silver penetration" phenomenon will not occur, resulting in chronic leakage of the anode ring. Therefore, in the preparation process described in this embodiment, the A anode ring 13 no longer needs to be subjected to conventional nickel plating treatment, thereby simplifying the preparation process and reducing the preparation cost. Fig. 7 is a schematic diagram of the welding structure of a B anode assembly 200 according to the third embodiment of the present invention. Here, only the differences between the third embodiment and the first embodiment are mainly described. Specifically, the main difference between the anode assembly 200 B shown in FIGS. 7 to 9 and the anode assembly 100 A shown in FIGS. 1 to 3 is that the first groove 22 and the second groove 101 B have the same concave direction. That is, both the first groove 22 and the second groove 101 are recessed toward the second end 10 b. The first groove 22 is open upward to receive the first extension ring 131 and the solder 15 as shown in the figure. Furthermore, the main difference between the B anode assembly 200 shown in Figures 7 to 9 and the A anode assembly 100 shown in Figures 1 to 3 is that the shape of the B anode ring 23 is different from the shape of the A anode ring 13. In one example, the second extension ring 133 can be bent radially inward and then bent downward to obtain the connecting ring 134 and the A first extension ring 131 in sequence, thereby obtaining the B anode ring 23. It should be noted that the pocket welding method shown in FIG. 4 can also be suitable for manufacturing the B anode assembly 200 shown in FIG. 7 to FIG. 9 . During the preparation, the main difference between the operation flow of preparing the anode assembly B 200 and the operation flow of preparing the anode assembly A 100 is that when the first groove 22 and the second groove 101 of B are in the same direction, the first end 10a is located above the second end 10b during welding. That is, when the pre-assembled part shown in FIG. 7 is heated, the posture shown in FIG. 7 (that is, The first end 10a is placed on the top and the second end 10b is placed on the bottom in a vacuum heating device for heating. Thus, the first section 132 is supported on the bottom wall 121 during heating, ensuring the structural stability of the entire pre-assembled component. Further, as the solder 15 is heated and melted, the solder 15 enters the gap 14 between the first section 132 and the first side wall 122 and the solder densification groove 16 from the position shown in FIG9 (e.g., the solder storage groove 123) under the capillary action. As the temperature gradually drops to room temperature, the solder 15 re-solidifies, completing the fixed connection between the A first extension ring 131 and the B first groove 22. In some embodiments, the main difference between the anode assembly 200 B shown in FIGS. 7 to 9 and the anode assembly 100 A shown in FIGS. 1 to 3 is that the first side wall 122 can be folded in a direction away from the first groove 22 B to form a flange. In some embodiments, the main difference between the anode assembly 200 B shown in FIGS. 7 to 9 and the anode assembly 100 A shown in FIGS. 1 to 3 is that the first outer surface 102 is closer to the first end 10 a than the second outer surface 103 . Fig. 10 is a partial schematic diagram of an anode assembly 300 according to the fourth embodiment of the present invention. Here, only the differences between the fourth embodiment and the first embodiment are mainly described. Fig. 10 schematically illustrates the relevant areas of the welding structure of the anode assembly 300 with reference to the perspective shown in Fig. 3. Specifically, the main difference between the anode assembly 300 shown in FIG10 and the A anode assembly 100 shown in FIG1 to FIG3 is that the portion of the C anode ring 33 extending into the A first groove 12 has a multi-bend structure. For example, the B first extension ring 331 also includes a second section 332 parallel to the A bottom wall 121. In some embodiments, the end of the B first extension ring 331 extending into the A first groove 12 (for example, the end of the first section 132) can be further folded to form a flange and contact the A bottom wall 121 surface to surface (or be arranged opposite to each other with the solder 15 sandwiched in between), and the flange is suitable for forming the second section 332. Furthermore, the first section 132 and the second section 332 can be transitioned into an arc, and the size of the chamfer can be determined according to the size of the chamfer between the bottom wall 121 of A and the first side wall 122, so as to obtain a better sealing effect. Thus, the first extension ring 331 of B has two surfaces respectively disposed against the bottom wall 121 of A and the first side wall 122, which is beneficial for increasing the area of ​​the welding surface to improve welding reliability. Furthermore, the first section 132 and the second section 332 may both be annular structures arranged along the circumference of the body 10 . In some embodiments, for the pre-assembled part assembled during preparation, the solder 15 can be located between the first outer surface 102 and the second section 332. In some embodiments, the solder 15 can also be located between the second section 332 and the A bottom wall 121. In this example, the entire A first groove 12 can be regarded as a solder storage groove 123. In a variation, the B anode ring 23 in the B anode assembly 200 shown in FIGS. 7 to 9 may also include a second section (not shown), which is useful for increasing the welding area with the A first groove 12 to improve welding reliability. FIG11 is a partial schematic diagram of an anode assembly 400 according to the fifth embodiment of the present invention. Here, only the differences between the fourth embodiment and the first embodiment are mainly described. FIG11 is a partial schematic diagram of the welding structure of the anode assembly 400 according to the perspective shown in FIG3. The area is schematically illustrated. Specifically, the main difference between the anode assembly 400 shown in FIG. 11 and the anode assembly 100 A shown in FIGS. 1 to 3 is that the solder storage groove 123 can be higher than other parts of the first groove 42 C according to the perspective of the figure. That is, the bottom wall 421 B includes a first step surface 422 and a second step surface 423 with a height difference along the axial direction of the body 10 (for example, the extension direction of the axis x). The first step surface 422 and the second step surface 423 cooperate to form an annular step surrounding the body 10. For example, the solder 15 may be placed on the first step surface 422 . Further, the first section 132 may extend into a portion of the C-shaped first groove 42 that is lower than the solder storage groove 123 . That is, the first section 132 may contact the second step surface 423 . Therefore, the shallower solder storage groove 123 is conducive to conveniently placing the solder 15, and the outer circle of the deepened C first groove 42 is conducive to preventing the solder 15 from overflowing. In summary, the present invention can improve the welding sealing effect of the anode assembly and enhance the welding firmness. Therefore, the present invention effectively overcomes various shortcomings in the prior art and has high industrial utilization value. The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A method for welding an anode assembly, characterized in that: The following steps are involved: The step of setting the body includes providing a body in the shape of an axis, wherein the axis of the body is set vertically, the body having a first end and a second end opposite to each other, a first groove which is recessed inward from the outer surface of the body is set around the body, the recessed direction of the first groove and the direction from the first end to the second end have an angle which is not 90°, and the opening direction of the first groove is upward or obliquely upward; and a solder densification groove which is recessed inward from the groove side wall of the first groove is set in the first groove and around the body; Anode target setting step: providing an anode target and fixing the anode target to the first end; Anode ring setting step: providing an anode ring, and sleeve-mounting the anode ring on the body, wherein the anode ring comprises a first extension ring, and at least a portion of the first extension ring extends into the first groove; Pre-assembly step: placing solder in the first groove and the solder densification groove to obtain a pre-assembled part; Welding process step: welding and fixing the first extension ring and the body in the first groove by using the solder to obtain the anode assembly; The step of welding and fixing the first extension ring and the body in the first groove by using the solder comprises: The pre-assembled component is heated in a vacuum environment until the solder is melted, so that the solder is in a molten state in the first groove and the solder densification groove, and the solder flows to the gap between the first extension ring and the first groove under the capillary action and at least fills the bottom of the first groove and a part of the groove cavity of the solder densification groove; After keeping the temperature for a preset period of time, the temperature is lowered in a vacuum environment until the solder is re-solidified.

2. The method for welding anode components according to claim 1, characterized in that: The opening of the solder densification groove is connected to the bottom of the first groove.

3. The method for welding anode components according to claim 1, characterized in that: The concave direction of the solder densification groove and the direction from the first end to the second end form an angle of 90°.

4. The method for welding anode components according to claim 1, characterized in that: The solder densification groove is recessed toward the axis of the body in a straight line or in a curved manner.

5. The method for welding anode components according to claim 1, characterized in that: The first groove includes a bottom wall extending outward from the main body and a first side wall located on the side of the bottom wall away from the main body, and the re-solidified solder is located in the solder densification groove, the first groove, and between the first extension ring and the bottom wall and between the first extension ring and the first side wall.

6. The method for welding anode components according to claim 5, characterized in that: The first extension ring includes a first section parallel to the first side wall. Before the pre-assembled part is heated, a non-zero gap exists between the first section and the first side wall. After the pre-assembled part is heated, the solder flows to and fills the gap under capillary action.

7. The method for welding anode components according to claim 6, characterized in that: The first groove includes a solder storage groove, which is closer to the body than the gap. Before the preassembly is heated, the solder is accommodated in the solder storage groove. After the preassembly is heated, the solder flows from the solder storage groove toward the gap and the solder densification groove.

8. The method for welding anode components according to claim 1, characterized in that: During heating, the surface of the anode ring is directly exposed to the vacuum environment; and / or during heating, the end of the first extension ring extending into the first groove is supported by the bottom wall of the first groove.

9. The method for welding anode components according to claim 1, characterized in that: The body includes a second groove recessed inward from the first end, the first groove and the second groove are recessed in the same direction or opposite directions, and fixing the anode target to the first end includes: fixing the anode target to the second groove.

10. The method for welding anode components according to claim 9, characterized in that: When the first groove and the second groove have the same concave direction, the first end is located above the second end during welding; or when the first groove and the second groove have opposite concave directions, the first end is located below the second end during welding.

11. The method for welding anode components according to claim 1, characterized in that: The pre-assembly step further comprises: after placing solder in the first groove and the solder densification groove, using an anti-oxidation ring to clamp at the opening of the first groove.

12. The method for welding anode components according to claim 11, characterized in that: The solder in the solder densification groove and the first groove is in one or more of a granular, paste, and ring shape.

13. The method for welding anode components according to claim 12, characterized in that: The solder in the solder densification groove has a first ring shape with a circular cross section; the solder between the bottom wall of the first groove and the end face of the anti-oxidation ring has a second ring shape with a rectangular cross section.

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