Multi-section absorber electron beam welding apparatus and welding method

Abstract

This invention relates to the field of welding and discloses a multi-segment absorber electron beam welding apparatus and method. The multi-segment absorber electron beam welding apparatus includes: a mounting platform, a rotating mechanism, a tail top seat, a head support, a tail support, and an intermediate support. The rotating mechanism and the tail top seat are spaced apart on the mounting platform. A pin is provided at the end of the tail top seat near the rotating mechanism. The head support is clamped and connected to the end of the rotating mechanism near the tail top seat and can be driven to rotate by the rotating mechanism. A second groove and a pin groove are respectively provided at opposite ends of the tail support. The intermediate support includes a lifting seat, a rolling element, and a support ring. The multi-segment absorber electron beam welding apparatus of this invention can stably support and fix the absorber, ensuring the stability of the absorber during electron beam welding, avoiding defects such as indentations and pits on the absorber surface, and thus improving the welding quality of the absorber.

Description

Technical Field

[0001] This invention relates to the field of welding technology, and in particular to a multi-segment absorber electron beam welding apparatus and welding method. Background Technology

[0002] The Hard X-ray Free Electron Laser Facility (SHINE) is a new generation of high-repetition-rate free electron laser facility based on a continuous-wave superconducting accelerator. SHINE will provide cutting-edge research tools with multiple technological advantages, including high-resolution imaging, ultrafast dynamics analysis, and advanced structural analysis, to address key scientific questions in multiple fundamental disciplines such as energy, materials, physics, chemistry, and life sciences. The electron beam energy at the ends of the SHINE superconducting linear accelerator and undulator can reach 8.0 GeV, the bundle charge will vary between 100 pC and 300 pC, and the repetition rate will be adjusted according to requirements, with a total power not exceeding 800 kW. Therefore, beam collectors are installed at the ends of the linear accelerator and undulator to collect the electron beam, and their key performance indicators must meet the operational requirements of an 800 kW beam power.

[0003] The key component of the beam collector is the absorber, which consists of multiple copper rings, typically nine in number. All rings are made of TU1 oxygen-free copper, and graphite blocks are embedded within the copper rings. The copper rings are connected using electron beam welding, while the graphite is brazed to the copper rings. In some examples, the absorber has a total length of 3000 mm, an outer diameter of 646 mm, an inner diameter of 480 mm, and 16 38 mm diameter through-holes evenly distributed around the circumference of the copper rings for cooling water. The entire absorber, including all the copper rings and the internal graphite, weighs approximately 4925 kg.

[0004] There is currently no suitable welding fixture for electron beam welding of the copper absorber rings mentioned above. Therefore, how to design a welding fixture that can meet the requirements of electron beam welding of multiple absorber sections has become an urgent problem to be solved. Summary of the Invention

[0005] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one object of the present invention is to provide a multi-segment absorber electron beam welding device, which can stably support and fix the absorber, ensuring the stability of the absorber during electron beam welding, avoiding defects such as indentations and pits on the absorber surface, and thus improving the welding quality of the absorber.

[0006] The present invention also aims to provide a welding method for multi-segment absorbers, using the aforementioned multi-segment absorber electron beam welding apparatus.

[0007] An electron beam welding apparatus for multi-segment absorbers according to an embodiment of the present invention includes: a mounting platform; a rotating mechanism and a tail top seat, the rotating mechanism and the tail top seat being spaced apart on the mounting platform, the tail top seat having a pin at one end near the rotating mechanism; a head support member, the head support member being clamped and connected to the end of the rotating mechanism near the tail top seat and being rotatable by the rotating mechanism, the head support member having a first groove at one end facing the tail top seat; a tail support member, the tail support member having a second groove and a pin groove at opposite ends, the second groove and the first groove facing each other, the pin groove engaging with the pin; and an intermediate support member, the intermediate support member being disposed between the head support member and the tail support member, the intermediate support member including a lifting seat, a rolling element, and a support ring sleeve, the lifting seat being disposed on the mounting platform, the rolling element being disposed on the lifting seat and supported on the bottom of the support ring sleeve; wherein, the support ring sleeve is configured to be sleeved on the absorber, and the first groove and the second groove are configured to engage with the head and tail ends of the absorber.

[0008] According to the embodiments of the present invention, the multi-segment absorber electron beam welding apparatus can stably and reliably support the absorber through the head support member, the tail support member and the intermediate support member, which is beneficial to ensure that the absorber is subjected to uniform force at each position during the fixing process, so as to avoid defects such as indentation and pit on the surface of the absorber during the electron beam welding process, and thus improve the welding quality of the absorber.

[0009] In some embodiments of the present invention, the mounting platform is provided with a slide rail that extends along the interval direction between the rotating mechanism and the tail top seat. The bottoms of the rotating mechanism and the tail top seat are engaged with the slide rail and can be slidably adjusted along the extension direction of the slide rail.

[0010] In some embodiments of the present invention, there are multiple intermediate support members, and the bottom of the lifting seat of the multiple intermediate support members is fitted on the slide rail and can be slidably adjusted along the extension direction of the slide rail.

[0011] In some embodiments of the present invention, the head support member has a first protrusion at one end near the rotating mechanism, the rotating mechanism has a rotating end, the rotating end is provided with a chuck, and the chuck clamps the first protrusion.

[0012] In some embodiments of the present invention, the tail support member has a second protrusion at one end near the tail top seat, and the ejector pin groove is a conical groove and is provided on the second protrusion.

[0013] In some embodiments of the present invention, the head support and the tail support are discs, and the first groove and the second groove are circular grooves.

[0014] In some embodiments of the present invention, the outer ring of the support ring sleeve is provided with a limiting groove, the limiting groove being annular in the circumferential direction of the support ring sleeve, and the rolling element fitting within the limiting groove.

[0015] In some embodiments of the present invention, the rotating mechanism and the tail top seat are spaced apart along a first direction, the lifting seat has two extension arms, the two extension arms extend away from the mounting platform and are spaced apart along a direction perpendicular to a second direction, each extension arm is provided with the rolling element, and the second direction is perpendicular to the first direction.

[0016] In some embodiments of the present invention, the support ring sleeve includes two semicircular sleeves, which are detachably connected. Each semicircular sleeve is provided with a semi-circular groove, and the two semi-circular grooves together form the limiting groove.

[0017] According to an embodiment of the present invention, a welding method for a multi-segment absorber is performed using any of the aforementioned electron beam welding apparatuses. The absorber comprises multiple rings arranged sequentially along the axial direction of the absorber. The welding method includes: welding the multiple rings in batches of two; assembling a first ring group on the electron beam welding apparatus, supporting the rings with the intermediate support member, and maintaining the centers of all rings at the same height using the lifting seat; placing the electron beam welding apparatus and the first ring group together in the vacuum chamber of an electron beam welding machine and evacuating the vacuum; performing a welding operation on the first ring group, the welding operation including first positioning welding followed by deep penetration welding; the positioning welding includes: driving the first ring group to rotate, controlling the electron beam current of the electron beam welding to 30mA to 60mA and the focusing current to 2280 Ω during the rotation. The welding current is controlled at 2410 mA to 2410 mA, the welding speed is controlled at 5 mm / s to 10 mm / s, and the waveform is a circular wave. The deep penetration welding includes: driving the first ring group to rotate, controlling the electron beam current of electron beam welding at 240 mA to 300 mA, the focusing current at 2230 mA to 2360 mA, the welding speed at 5 mm / s to 10 mm / s, and the waveform is a circular wave. After the welding of the first ring group is completed, the multi-section absorber electron beam welding device is taken out from the vacuum chamber, and then the first ring group is removed. The next ring group is assembled onto the multi-section absorber electron beam welding device, and after assembly, it is put back into the vacuum chamber for the welding operation. After the welding of the next ring group is completed, two adjacent ring groups are assembled onto the multi-section absorber electron beam welding device for electron beam welding, and the welding operation is performed. This process is repeated to complete the welding of the absorber.

[0018] According to the welding method of the multi-segment absorber of the present invention, multiple rings are welded in batches of two, which reduces the assembly difficulty of the ring group on the welding device during each welding process, improves the support stability of the ring group in the welding device, and thus improves the welding quality. Furthermore, it allows for other processing steps on the already welded ring groups during the welding of the next ring group, improving the processing efficiency of the absorber. When performing electron beam welding on the ring group, the method of first positioning welding and then deep penetration welding allows for accurate positioning between adjacent rings in advance, ensuring the positional accuracy of the adjacent rings and thus guaranteeing the welding quality of the ring group. Setting the welding parameters for positioning welding and deep penetration welding within the aforementioned range allows for control of the heat input of electron beam welding at an appropriate value, ensuring the completion of the required weld depth while preventing the melting of the brazing filler metal in the internal brazing weld, thereby improving the welding quality of the absorber.

[0019] In some embodiments of the present invention, the welding operation further includes performing finishing welding after the deep penetration welding is completed. The finishing welding includes: driving the ring assembly to rotate, and controlling the electron beam current of the electron beam welding to 20mA to 40mA, controlling the focusing current to 2180 to 2310mA, setting the frequency to 10Hz to 40Hz, and welding with a circular wave waveform.

[0020] In some embodiments of the present invention, before the step of welding the plurality of ring bodies in batches of two, the welding method further includes: providing an annular boss on one of any two adjacent ring bodies and an annular groove on the other, wherein the annular groove and the annular boss cooperate with each other.

[0021] In some embodiments of the present invention, each ring body is provided with a plurality of through holes, the plurality of through holes being spaced apart circumferentially along the ring body and penetrating the ring body axially; the step of assembling the first ring group on the multi-section absorber electron beam welding device includes: installing the ring body at one end of the first ring group in the first groove of the head support member; installing the ring body at the other end of the first ring group in the second groove of the tail support member; installing a plug in the through hole of one of the two ring bodies of the first ring group, and inserting the plug into the through hole of the other ring body during the assembly of the two ring bodies.

[0022] In some embodiments of the present invention, after completing the welding of the first ring group, the multi-section absorber electron beam welding device is removed from the vacuum chamber, the first ring group is disassembled, the next ring group is assembled onto the multi-section absorber electron beam welding device, and after the assembly is completed, it is placed back into the vacuum chamber to perform the welding operation on the next ring group. The method further includes: removing the plug block in the through hole of the ring group and machining the through hole.

[0023] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0024] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0025] Figure 1 A three-dimensional structural diagram of the multi-section absorber electron beam welding device and the absorber assembly provided in some embodiments of the present invention;

[0026] Figure 2 Exploded view of the structure of the multi-section absorber electron beam welding device and a three-dimensional schematic diagram of the absorber from one perspective, provided for some embodiments of the present invention;

[0027] Figure 3 Exploded view of the structure of the multi-section absorber electron beam welding apparatus and a three-dimensional schematic diagram of the absorber from another perspective, provided for some embodiments of the present invention;

[0028] Figure 4 for Figure 1 A magnified view of a portion of point I;

[0029] Figure 5 Cross-sectional view of a multi-segment absorber electron beam welding apparatus and absorber assembly provided in some embodiments of the present invention;

[0030] Figure 6 Exploded views of the intermediate support structure provided in some embodiments of the present invention;

[0031] Figure 7 This is a flowchart of a welding method for multi-segment absorbers according to some embodiments of the present invention. Figure 1 ;

[0032] Figure 8 This is a schematic diagram of the structure of a ring from one perspective, provided for some embodiments of the present invention;

[0033] Figure 9 This is a schematic diagram of the structure of a ring from another perspective, provided for some embodiments of the present invention;

[0034] Figure 10 This is a flowchart of a welding method for multi-segment absorbers according to some embodiments of the present invention. Figure 2 .

[0035] Figure label:

[0036] 100. Electron beam welding device for multi-segment absorbers;

[0037] 10. Installation platform; 11. Slide rail;

[0038] 20. Rotating mechanism; 21. Chuck;

[0039] 30. Tail top seat; 31. Ejector pin;

[0040] 40. Head support member; 40a. First groove; 41. First protrusion;

[0041] 50. Tail support; 50a. Second groove; 50b. Ejector pin groove; 51. Second protrusion;

[0042] 60. Intermediate support component; 61. Lifting seat; 611. Extension arm; 601. Base; 602. Bracket; 603. Screw mechanism; 62. Rolling component; 63. Support ring sleeve; 63a. Limiting groove; 631. Semicircular sleeve; 631a. Semi-annular groove;

[0043] 200, Absorber; 210, Ring; 210a, Through hole; 210b, Annular groove; 211, Annular boss. Detailed Implementation

[0044] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0045] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0046] Furthermore, features specified as "first" or "second" may explicitly or implicitly include one or more of the same feature, used to distinguish and describe features, without any order or distinction of importance.

[0047] In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0048] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0049] The following is for reference. Figures 1-5 This invention describes a multi-segment absorber electron beam welding apparatus 100 according to an embodiment of the present invention.

[0050] like Figures 1 to 3 As shown, the multi-segment absorber electron beam welding apparatus 100 of this embodiment includes: a mounting platform 10, a rotating mechanism 20, a tail top seat 30, a head support 40, a tail support 50, and an intermediate support 60. The rotating mechanism 20 and the tail top seat 30 are spaced apart on the mounting platform 10, and a pin 31 is provided at the end of the tail top seat 30 near the rotating mechanism 20. The head support 40 is clamped and connected to the end of the rotating mechanism 20 near the tail top seat 30, and can be driven to rotate by the rotating mechanism 20. A first groove 40a is provided at the end of the head support 40 facing the tail top seat 30. A second groove 50a and a pin groove 50b are respectively provided at opposite ends of the tail support 50. The second groove 50a and the first groove 40a are facing each other, and the pin groove 50b is fitted onto the pin 31. An intermediate support member 60 is located between the head support member 40 and the tail support member 50. The intermediate support member 60 includes a lifting seat 61, a rolling member 62, and a support ring sleeve 63. The lifting seat 61 is located on the mounting platform 10, and the rolling member 62 is located on the lifting seat 61 and supported by the bottom of the support ring sleeve 63. The support ring sleeve 63 is configured to be sleeved on the absorber 200, and the first groove 40a and the second groove 50a are configured to fit at the head and tail ends of the absorber 200.

[0051] The mounting platform 10 can refer to a base used for installation and support, and can be, but is not limited to, a single-layer frame structure or a base plate, etc. The rotating mechanism 20 can refer to a drive mechanism that rotates the absorbent body 200; for example, the rotating mechanism 20 can be a motor or other device capable of rotation. The tail-end top seat 30 can refer to a component that limits the tail of the absorbent body 200 via a pin 31. The rotating mechanism 20 and the tail-end top seat 30 are respectively located at both ends of the absorbent body 200, limiting the absorbent body 200 in the axial direction and controlling the absorbent body 200 to rotate around the axial direction. For example, refer to... Figure 1 and Figure 5 The rotating mechanism 20 and the top seat 30 of the card tail are located at the left and right ends of the absorber 200.

[0052] The head support 40 can refer to the component connected to the rotating mechanism 20. The head support 40 is clamped and connected to the rotating end of the rotating mechanism 20 and can be driven to rotate by the rotating mechanism 20. The head support 40 is provided with a first groove 40a. The ring 210 of the first section of the absorber 200 can be fitted into the first groove 40a to limit the ring 210 of the first section.

[0053] The tail support 50 can refer to the component of the connecting card tail top seat 30. The tail support 50 has a second groove 50a and a pin groove 50b at opposite ends. The last ring 210 of the absorber 200 fits in the second groove 50a to limit the last ring 210. The pin groove 50b fits on the pin 31 to limit the pin 31.

[0054] The intermediate support 60 can refer to the component that supports the intermediate ring 210 of the absorber 200. The intermediate support 60 includes a lifting seat 61, a rolling element 62, and a support ring sleeve 63. The lifting seat 61 is mounted on the mounting platform 10, and the connection between the lifting seat 61 and the mounting platform 10 can be, but is not limited to, snap-fit, bolt connection, etc. The lifting seat 61 can also be, but is not limited to, a lifting device such as a cylinder, hydraulic cylinder, linear motor, or lead screw. For example, the lifting seat 61 can be a device that can be adjusted for lifting via a lead screw. The rolling element 62 is mounted on the lifting seat 61 and supported at the bottom of the support ring sleeve 63. The rolling element 62 can be, but is not limited to, a ball, roller, or shaft, etc., and is rotatably mounted on the lifting seat 61. The rolling element 62 and the support ring sleeve 63 can be in rolling contact. The support ring 63 is sleeved on the absorber 200, and there is a large contact area between the support ring 63 and the absorber 200. In this way, when the rotating mechanism 20 drives the absorber 200 to rotate, the support ring 63 can rotate relative to the rolling element 62, thereby realizing that the ring 210 in the middle position rotates with the rings 210 at both ends.

[0055] In the above technical solution, firstly, the absorber 200 is installed on the multi-section absorber electron beam welding device 100. The first and last sections of the absorber 200 are connected to the rotating mechanism 20 and the tail top seat 30 through the first groove 40a and the second groove 50a, respectively. The rotating mechanism 20 is clamped and connected to the head support 40. The tail top seat 30 and the tail support 50 are connected through the ejector pin groove 50b and the ejector pin 31 to restrict the displacement of the absorber 200 in the axial direction. The intermediate support 60 is sleeved by a support ring. The ring 63 is fitted onto the absorber 200. One or more intermediate support members 60 can be provided, adaptable to the number of rings 210. If multiple intermediate support members 60 are spaced apart along the axial direction of the absorber 200, the lifting seat 61 is controlled to make the axes of the support rings 63 and the multiple absorbers 200 coincide, thus ensuring uniform force distribution between the absorber 200 and the support rings 63. This ensures that the distance between each position of the multiple rings 210 and the mounting platform 10 remains consistent, reducing welding gaps. After installation, the absorber 200 is rotated using the rotating mechanism 20, and welding is performed on the absorber 200.

[0056] It should be noted that in the absorber 200 of this embodiment, the inner layer of each ring 210 can be a graphite ring, and the outer layer is a copper ring made of oxygen-free copper. Since oxygen-free copper is relatively soft, it can be easily installed and fitted with the rings 210 at both ends of the absorber 200 through the first groove 40a of the head support member 40 and the second groove 50a of the tail support member 50. The rings 210 can be directly inserted into the corresponding mounting grooves. This reduces the risk of deformation due to deviation in force during installation. The intermediate support member 60 can support the rings 210 in the unwelded state to provide corresponding support for the rings 210 in the middle position and allow the rings 210 in the middle position to rotate. Moreover, the support ring sleeve 63 can also achieve surface contact with the corresponding rings 210, which can avoid the risk of defects such as indentations and pits on the surface of the rings 210, so as to ensure the welding weight of the rings 210.

[0057] In the above technical solution, the absorber 200 is supported and limited by the first groove 40a of the head support member 40, the second groove 50a of the tail support member 50 and the support ring 63 of the intermediate support member 60, so that the assembly error of the absorber 200 in the welding device is less than 0.5mm and the gap is less than 0.5mm, thereby meeting the high-precision part positioning requirements of the absorber 200.

[0058] According to an embodiment of the present invention, the multi-segment absorber electron beam welding apparatus 100 allows the absorber 200 to be stably and reliably supported and fixed by contacting the first groove 40a of the head support member 40, the second groove 50a of the tail support member 50, and the support ring 63 of the intermediate support member 60. This facilitates uniform force distribution at various positions of the absorber 200 during the fixing process, ensuring that defects such as scratches and pits are avoided on the surface of the absorber 200 during electron beam welding. This improves the welding quality of the absorber 200, increases the pass rate of the absorber 200 welding, and reduces costs.

[0059] In some embodiments of the present invention, reference 1 and Figure 4 The installation platform 10 is provided with a slide 11, which extends along the interval direction between the rotating mechanism 20 and the top seat 30 of the card tail. The bottom of the rotating mechanism 20 and the top seat 30 of the card tail are fitted on the slide 11 and can be slidably adjusted along the extension direction of the slide 11.

[0060] For example, "interval direction" can be referred to Figure 1 The left and right directions.

[0061] It is understood that the absorber 200 may include a plurality of rings 210, and the number of rings 210 may be, but is not limited to, two, three, four, five, six, seven, eight, nine, ten, etc. For example, see reference... Figure 2 The absorber 200 comprises nine rings 210. The rings 210 of the absorber 200 can be simultaneously assembled onto the multi-section absorber electron beam welding device 100 for welding, or a portion of the rings 210 of the absorber 200 can be assembled onto the multi-section absorber electron beam welding device 100 for welding, and then combined for final welding. For example, multiple rings 210 can be welded in pairs, and the entire absorber 200 can be formed by welding multiple ring groups together.

[0062] In the above technical solution, the installation platform 10 is provided with a slide rail 11, and the bottom of the rotating mechanism 20 and the top seat 30 of the tail end are fitted on the slide rail 11. Thus, the rotating mechanism 20 and the top seat 30 of the tail end can be adjusted along the slide rail 11 in the axial direction of the absorber 200. In this way, when assembling and welding different numbers of rings 210, the distance between the rotating mechanism 20 and the top seat 30 of the tail end can be adjusted through the slide rail 11 to fix different numbers of rings 210, which is convenient for adjustment, saves time, and improves assembly efficiency.

[0063] In some embodiments of the present invention, the slide 11 may be, but is not limited to, a groove, a rail, or a rod, etc.

[0064] In some embodiments of the present invention, references are made to 1 to... Figure 3There are multiple intermediate support members 60, and the bottom of the lifting seat 61 of the multiple intermediate support members 60 is fitted on the slide rail 11 and can be slidably adjusted along the extension direction of the slide rail 11.

[0065] The number of intermediate support members 60 can be, but is not limited to, two, three, four, five, etc. For example, refer to... Figure 1 There are four intermediate support components of size 60.

[0066] In the above technical solution, combined with the previous embodiment, the bottom of the lifting seat 61 of the multiple intermediate support members 60 is fitted on the slide rail 11 and can be slidably adjusted along the extension direction of the slide rail 11. This makes it easy for the intermediate support members 60 to be assembled into the designated position of the absorber 200, so as to adaptably support the ring group of different numbers of ring bodies 210, improve the installation efficiency of the absorber 200, and save time.

[0067] In some embodiments of the present invention, reference is made to 2, Figure 3 and Figure 5 The first support member 40 has a first protrusion 41 at one end near the rotating mechanism 20. The rotating mechanism 20 has a rotating end, and a chuck 21 is provided at the rotating end. The chuck 21 clamps the first protrusion 41. In the above technical solution, the first protrusion 41 at one end of the first support member 40 near the rotating mechanism 20 facilitates the chuck 21 clamping the first protrusion 41, improves the assembly efficiency of the first support member 40 and the first support member 40, and thus improves the assembly efficiency of the absorber 200.

[0068] In some embodiments of the present invention, reference is made to 2, Figure 3 and Figure 5 The tail support 50 has a second protrusion 51 at one end near the top seat 30 of the tail section, and the ejector pin groove 50b is a tapered groove located on the second protrusion 51. In the above technical solution, the second protrusion 51 at one end of the tail support 50 near the top seat 30 of the tail section facilitates the cooperation between the tapered groove and the ejector pin 31, improves the assembly efficiency of the tail support 50 and the top seat 30 of the tail section, and thus improves the assembly efficiency of the absorber 200.

[0069] In some embodiments of the present invention, reference 2 and Figure 3The first support member 40 and the last support member 50 are disc-shaped, and the first groove 40a and the second groove 50a are circular grooves. In the above technical solution, the first support member 40 and the last support member 50 are disc-shaped, and the first groove 40a and the second groove 50a are circular grooves, which simplifies the structure and reduces costs. At the same time, the circular grooves of the first groove 40a and the second groove 50a can increase the contact area between the first support member 40 and the last support member 50 and the absorber 200, avoiding the risk of stress concentration on the absorber 200, avoiding scratches and pits on the surface of the absorber 200, and improving the reliability of the multi-section absorber electron beam welding device 100.

[0070] In some embodiments of the present invention, referring to reference 6, the outer ring of the support ring 63 is provided with a limiting groove 63a. The limiting groove 63a is annular in the circumferential direction around the support ring 63, and the rolling element 62 is fitted within the limiting groove 63a. In the above technical solution, the design of the limiting groove 63a and the rolling element 62 can limit the displacement of the support ring 63 in the axial direction, improve the stability of the intermediate support 60, keep the support ring 63 stable during rotation, avoid displacement or shaking caused by external forces, and further improve the reliability of the multi-section absorber electron beam welding device 100.

[0071] In some embodiments of the present invention, reference is made to 2, Figure 3 and Figure 6 The rotating mechanism 20 and the top seat 30 of the card tail are spaced apart along the first direction. The lifting seat 61 has two extension arms 611. The two extension arms 611 extend away from the mounting platform 10 and are spaced apart along a direction perpendicular to the second direction. Each extension arm 611 is provided with a rolling element 62. The second direction is perpendicular to the first direction.

[0072] For example, "first direction" can be referenced. Figure 2 The left and right directions. The "second direction" can be referenced. Figure 2 The forward and backward direction. The extension arm 611 can refer to two parts extending from the lifting seat 61; the two extension arms 611 can be parallel to each other or at an angle to each other. For example, see... Figure 6 The two extension arms 611 and the lifting seat 61 are Y-shaped as a whole.

[0073] In the above technical solution, the lifting seat 61 has two extension arms 611, each of which is equipped with a rolling element 62. This increases the support position for the ring body 210, provides more stable support for the ring body 210, optimizes the stress layout of the lifting seat 61, enhances the stability of the lifting seat 61 support, avoids displacement caused by external forces or vibrations, and ensures the smoothness of the welding process. Each extension arm 611 is equipped with a rolling element 62, which optimizes the stress layout of the rolling element 62, avoids damage to the rolling element 62, and improves the reliability of the multi-section absorber electron beam welding device 100.

[0074] Optionally, refer to Figure 6 The lifting seat 61 may include a base 601, a bracket 602, and a screw mechanism 603. The base 601 is mounted on the mounting platform 10. The screw mechanism 603 is threaded onto the base 601 and rotates with the bracket 602 about the axial direction of the screw mechanism 603. Two extension arms 611 are mounted on the bracket 602. The screw mechanism 603 may be, but is not limited to, a screw, lead screw, or similar mechanism. The base 601 is fixed to the mounting platform 10 by a pressure plate to prevent the lifting seat 61 from shaking during rotational welding. For example, the bottom of the base 601 may be flat.

[0075] In some embodiments of the present invention, reference is made to Figure 6 The support ring sleeve 63 includes two semicircular sleeves 631, which are detachably connected. Each semicircular sleeve 631 has a semicircular groove 631a, and the two semicircular grooves 631a together form a limiting groove 63a. The connection method of the two semicircular sleeves 631 can be, but is not limited to, snap-fit ​​connection, flange connection, bolt connection, riveting, etc. For example, one end face of the two semicircular sleeves 631 has a mounting hole, and the other has a threaded hole. Bolts can be used to fit into the mounting hole and the threaded hole to achieve the connection of the two semicircular sleeves 631. It should be noted that after assembly, the support ring sleeve 63 must maintain tight contact with the ring body 210 without any gaps. This allows the support ring sleeve 63 to rotate with the ring body 210, preventing sliding friction between the support ring sleeve 63 and the ring body 210 and thus preventing damage to the surface of the ring body 210. In the above technical solution, the two semi-circular sleeves 631 are detachably connected, which makes it easy to install the support ring sleeve 63 onto the ring body 210, saving time and reducing costs.

[0076] According to the welding method of the multi-segment absorber 200 of the present invention, welding is performed using the multi-segment absorber electron beam welding apparatus 100 of any of the preceding embodiments. The absorber 200 includes a plurality of rings 210, which are arranged sequentially along the axial direction of the absorber 200.

[0077] like Figure 7 As shown, the welding method of the multi-segment absorber 200 in this embodiment of the invention includes:

[0078] Step S1: Weld multiple rings 210 in batches of two.

[0079] For example, absorber 200 may include nine rings 210, which can be divided into four groups of two rings 210 each, as shown in the reference. Figure 2 and Figure 3Along a left-to-right direction, the nine rings 210 are numbered as first, second, third...ninth. The first and second rings 210 are welded together as the first group, then the third and fourth rings 210 are welded together as the second group. The first and second groups are then welded together to form the first assembly, which is temporarily stored. Next, the fifth and sixth rings 210 are welded together as the third group, then the seventh and eighth rings are welded together as the fourth group. The fourth group is then welded together with the empty ninth ring 210 to form the second assembly. The second assembly is then welded together with the third group to form the third assembly. Finally, the third assembly is welded together with the first assembly, thus completing the welding of the absorber 200.

[0080] Step S2: Assemble the first ring group on the multi-section absorber electron beam welding device 100, support the ring body 210 with the intermediate support 60, and keep the center of all ring bodies 210 at the same height with the lifting seat 61.

[0081] Step S3: Place the multi-section absorber electron beam welding device 100 and the first ring assembly together in the vacuum chamber of the electron beam welding machine, and then evacuate the vacuum. The vacuuming operation and procedures are known to those skilled in the art and will not be described in detail here. However, it should be noted that subsequent welding operations will only be performed after the vacuum level in the vacuum chamber reaches the specified value.

[0082] Step S4: Perform welding operation on the first ring group. The welding operation includes first positioning welding and then deep penetration welding.

[0083] The positioning welding process includes: driving the first ring assembly to rotate; during rotation, controlling the electron beam current of electron beam welding between 30mA and 60mA, the focusing current between 2280mA and 2410mA, and the welding speed between 5mm / s and 10mm / s, using a circular wave welding waveform. It can be understood that during positioning welding, the electron beam current can be, but is not limited to, 30mA, 35mA, 40mA, 45mA, 50mA, 55mA, 60mA, etc. The working distance of the welding torch in positioning welding can be 400mm to 600mm, and the accelerating voltage can be the equipment's own voltage, for example, 150KV.

[0084] Since the electron beam current of the electron beam welding gun cannot be directly increased from 0mA to 30mA~60mA, a point can be selected on the circumference of the weld as the zero point. Starting from the zero point, the weld is rotated clockwise by a first preset angle. During the rotation of the absorber 200, the electron beam current is linearly increased to the set value, and the weld is positioned 360 degrees with the set value of electron beam current, returning to the position of the first preset angle. Then, the weld is rotated again from the first preset angle to reduce the electron beam current to 0mA, completing the positioning welding. The first preset angle can be 5 degrees to 15 degrees.

[0085] Deep penetration welding includes: driving the first ring assembly to rotate; during rotation, controlling the electron beam current of electron beam welding between 240mA and 300mA, the focusing current between 2230mA and 2360mA, the welding speed between 5mm / s and 10mm / s, and using a circular wave welding waveform. It can be understood that during deep penetration welding, the electron beam current can be, but is not limited to, 240mA, 245mA, 250mA, 255mA, 260mA, 265mA, 270mA, 275mA, 280mA, 285mA, 290mA, 295mA, 300mA, etc. In deep penetration welding, the working distance of the welding torch and the positioning welding are kept consistent.

[0086] Since the electron beam current of the electron beam welding gun cannot be directly increased from 0mA to 240mA~300mA, a point can be selected on the circumference of the weld as the zero point. Starting from the zero point, the weld is rotated clockwise by a second preset angle. During the rotation of the absorber 200, the electron beam current is linearly increased to the set value, and the weld is positioned 360 degrees around the set value using the electron beam current. The weld then returns to the position of the second preset angle, and the weld is rotated again from the second preset angle to reduce the electron beam current to 0mA, thus completing the deep penetration welding. The second preset angle can be 30 degrees to 50 degrees.

[0087] Step S5: After completing the welding of the first ring group, remove the multi-section absorber electron beam welding device 100 from the vacuum chamber, then remove the first ring group, assemble the next ring group onto the multi-section absorber electron beam welding device 100, and put it back into the vacuum chamber after assembly to perform welding operation on the next ring group.

[0088] It should be noted that after the first ring assembly is welded, it needs to be cooled in the vacuum chamber for a period of time. Then, air is injected into the vacuum chamber. Once the air pressure in the vacuum chamber is balanced with the outside air, the vacuum chamber door is opened, the welding device is removed, and the first ring assembly is taken out.

[0089] Step S6: After the next ring group is welded, the two adjacent ring groups are assembled onto the multi-section absorber electron beam welding device 100 for electron beam welding and welding operation, and so on to complete the welding of the absorber 200.

[0090] After the absorber 200 is welded, the weld needs to undergo non-destructive testing. The electron beam weld must meet the NB / T47013 standard for non-destructive testing of pressure equipment. Furthermore, the welded absorber 200 needs to undergo vacuum negative pressure helium testing to ensure a leak rate of less than 1×10⁻⁶. -6 Pa*l / s, vacuum degree less than 1×10 -1 Pa's requirements.

[0091] In the above welding method, by welding multiple rings 210 in batches of two, the assembly difficulty between the absorber 200 and the welding device is reduced. This avoids the situation where the assembly accuracy and support stability cannot meet the requirements when multiple rings 210 of the absorber 200 are assembled on the welding device at the same time. By assembling ring groups composed of two rings 210 on the welding device, the number of rings 210 in the ring group is small. The ring group can be stably supported and fixed by the head support member 40, the tail support member 50, and the intermediate support member 60, which can improve the support stability of the ring group and the stability during the rotation process, thereby improving the welding quality. Secondly, by welding the absorber 200 in batches, each ring group can be removed after welding and the next ring group can be welded. The completed ring group can then undergo other processing steps, which can improve the processing efficiency of the absorber 200.

[0092] During the welding process, positioning welding can be performed first to initially fix the two connected rings 210 together, so as to ensure the positional accuracy between the two connected rings 210 and prevent relative displacement between the connected rings 210 during subsequent rotational welding. Then, deep penetration welding is used to completely weld the adjacent rings 210. This method is also beneficial to improve the welding quality of the absorber 200.

[0093] Furthermore, the wall thickness of the ring 210 in the absorber 200 is typically 83 mm. When welding adjacent rings 210, the weld penetration depth is required to be no less than 52 mm. Due to the good thermal conductivity of copper and the large size and volume of the absorber 200, a relatively large heat input value needs to be set in the welding parameters to achieve a penetration depth of no less than 52 mm. Secondly, since the inner graphite layer and the outer copper ring of the ring 210 are brazed, the solder melting temperature is low. Therefore, while ensuring the electron beam weld penetration depth, it is necessary to reduce the heat input to prevent the solder in the brazed weld from melting. In the above welding method, by setting the welding parameters for tack welding and deep penetration welding within the aforementioned range, the heat input for electron beam welding can be controlled to maintain an appropriate value. This ensures that a large weld depth is achieved between two adjacent rings 210 while preventing the solder in the brazed weld between the inner graphite layer and the outer copper ring from melting, which also helps to improve the welding quality of the absorber 200.

[0094] According to the welding method of the multi-section absorber 200 of the present invention, multiple rings 210 are welded in batches of two. This reduces the assembly difficulty of the ring group on the welding device during each welding process, improves the support stability of the ring group in the welding device, and thus improves the welding quality. Furthermore, it allows for other processing steps on the already welded ring groups during the welding of the next ring group, improving the processing efficiency of the absorber 200. When performing electron beam welding on the ring group, the method of first positioning welding and then deep penetration welding allows for pre-positioning and accurate identification between adjacent rings 210, ensuring the positional accuracy of the adjacent rings 210 and thus guaranteeing the welding quality of the ring group. Setting the welding parameters for positioning welding and deep penetration welding within the aforementioned range allows for control of the heat input of electron beam welding at an appropriate value, ensuring the completion of the required weld depth while preventing the melting of the brazing filler metal in the internal brazing weld, thereby improving the welding quality of the absorber 200.

[0095] In some embodiments of the present invention, the welding operation further includes performing finishing welding after completing deep penetration welding. Finishing welding includes: driving the ring assembly to rotate, and controlling the electron beam current of electron beam welding to 20mA to 40mA, controlling the focusing current to 2180 to 2310mA, setting the frequency to 10Hz to 40Hz, and performing welding with a circular wave waveform.

[0096] In the above technical solution, performing finishing welding after deep penetration welding can optimize the surface quality of the weld, reduce unevenness such as burrs, protrusions, or depressions that may occur on the weld surface, and achieve a good forming effect by modifying the weld surface, thereby improving the appearance and performance of the welded part. By setting the parameters of finishing welding within the above range, the surface finishing effect can be improved.

[0097] In some embodiments of the present invention, reference is made to Figure 8 and Figure 9 Before the step of welding multiple rings 210 in batches of two, the welding method further includes: providing an annular boss 211 on one of any two adjacent rings 210 and an annular groove 210b on the other, with the annular groove 210b and the annular boss 211 cooperating with each other.

[0098] In the above technical solution, the annular groove 210b and the annular boss 211 cooperate with each other to ensure the concentricity between two adjacent rings 210, ensure the assembly accuracy between the rings 210, reduce assembly errors, and improve the reliability of the absorber 200.

[0099] In some embodiments of the present invention, reference is made to... Figure 8 and Figure 9 Each ring 210 has multiple through holes 210a, which are spaced apart circumferentially along the ring 210 and extend through the ring 210 along its axial direction. (Reference) Figure 10 The steps of assembling the first ring group on the multi-section absorber electron beam welding apparatus 100 include:

[0100] The ring 210 at one end of the first ring group is installed in the first groove 40a of the head support member 40.

[0101] The ring 210 at the other end of the first ring group is installed in the second groove 50a of the tail support 50.

[0102] A plug is installed in the through hole 210a of one of the two rings 210 in the first ring assembly, and the plug is inserted into the through hole 210a of the other ring during the assembly of the two rings 210. The shape of the plug matches the shape of the through hole 210a, and can be, but is not limited to, cylindrical, prismatic, etc. The plug can also be made of, but is not limited to, ceramic, stainless steel, etc. For example, the plug can be a ceramic cylinder.

[0103] The first groove 40a and the second groove 50a are circular grooves with an inner diameter 20 to 40 micrometers larger than the outer diameter of the ring 210. This facilitates the assembly of the ring 210 with the first groove 40a and the second groove 50a. A thin copper sheet can be inserted circumferentially into the circular gap between the ring 210 and the first groove 40a and the second groove 50a. The thickness of the copper sheet is equal to the gap between the ring 210 and the first groove 40a, and also equal to the gap between the ring 210 and the second groove 50a, to ensure that the ring 210 remains concentric with the corresponding head support 40 or the corresponding tail support 50.

[0104] In the above technical solution, the plug can be installed in the through holes 210a of two adjacent ring bodies 210 to keep the through holes 210a of the two adjacent ring bodies 210 aligned, ensuring the continuity of the through holes 210a and thus ensuring that the through holes 210a penetrate the entire absorber 200. It also plays a positioning role for the two adjacent ring bodies 210, ensuring their positioning accuracy, which is beneficial to improving the welding quality of the ring assembly. Secondly, the plug can also fill the location of the through holes 210a, preventing the risk of solder accumulation in the through holes 210a or deformation of the through holes 210a during electron beam welding, thereby ensuring the welding quality of the ring assembly.

[0105] In some embodiments of the present invention, after the welding of the first ring group is completed, the multi-section absorber electron beam welding device 100 is taken out from the vacuum chamber, the first ring group is then removed, the next ring group is assembled onto the multi-section absorber electron beam welding device 100, and after the assembly is completed, it is put back into the vacuum chamber to perform welding operations on the next ring group. After this step, the device further includes: removing the plug in the through hole 210a in the ring group and machining the through hole 210a.

[0106] For example, if the plug is a ceramic column, after the two rings 210 in the ring assembly are welded together, an auxiliary tool such as an iron rod can be inserted into the through hole 210a to break and remove the ceramic column. Then, the through hole 210a can be machined using a drill bit or other machining tools to ensure that the through hole 210a meets the design requirements. The plug can also be removed directly by machining with a drill bit or other tools.

[0107] In the above technical solution, removing the plug in the through hole 210a in the ring assembly and machining the through hole 210a can ensure that the size and surface finish of the through hole 210a meet the design requirements and guarantee the reliability of the absorber 200.

[0108] The following is combined Figures 1 to 6 This describes a specific embodiment of the multi-segment absorber electron beam welding apparatus 100 of the present invention.

[0109] The multi-segment absorber electron beam welding device 100 includes: a mounting platform 10, a rotating mechanism 20, a tail top seat 30, a head support 40, a tail support 50, and an intermediate support 60.

[0110] The mounting platform 10 is provided with a slide 11, which extends along the interval direction between the rotating mechanism 20 and the top seat 30 of the card tail. The bottom of the rotating mechanism 20 and the top seat 30 of the card tail are fitted on the slide 11 and can be slidably adjusted along the extension direction of the slide 11.

[0111] The rotating mechanism 20 and the top seat 30 of the card tail are spaced apart along the first direction. The lifting seat 61 has two extension arms 611. The two extension arms 611 extend away from the mounting platform 10 and are spaced apart along a direction perpendicular to the second direction. Each extension arm 611 is provided with a rolling element 62. The second direction is perpendicular to the first direction.

[0112] A pin 31 is provided at one end of the card tail top seat 30 near the rotating mechanism 20. The rotating mechanism 20 and the card tail top seat 30 are spaced apart on the mounting platform 10.

[0113] The first support member 40 is a disc, and a first protrusion 41 is provided at one end near the rotating mechanism 20. The rotating mechanism 20 has a rotating end, and a chuck 21 is provided at the rotating end. The chuck 21 is clamped in the first protrusion 41. The first support member 40 can be driven to rotate by the rotating mechanism 20. A first groove 40a is provided at one end of the first support member 40 facing the top seat 30 of the tail.

[0114] The tail support member 50 is a disc-shaped component, with a second groove 50a and a pin groove 50b at opposite ends. The second groove 50a and the first groove 40a face each other. The first groove 40a and the second groove 50a are circular grooves. The pin groove 50b fits onto the pin 31. The tail support member 50 has a second protrusion 51 at one end near the top seat 30 of the tail end, and the pin groove 50b is a conical groove located on the second protrusion 51.

[0115] The intermediate support member 60 includes a lifting seat 61, a rolling element 62, and a support ring sleeve 63. The lifting seat 61 is mounted on the mounting platform 10. The rolling element 62 is mounted on the lifting seat 61 and supported by the bottom of the support ring sleeve 63. The support ring sleeve 63 includes two semi-circular sleeves 631, which are detachably connected. Each semi-circular sleeve 631 has a semi-annular groove 631a, and the two semi-annular grooves 631a together form a limiting groove 63a, in which the rolling element 62 is fitted. There are four intermediate supports. The bottom of the lifting seat 61 of the four intermediate support members 60 is fitted on the slide rail 11 and can be slidably adjusted along the extension direction of the slide rail 11. The support ring sleeve 63 is configured to be sleeved on the absorber 200, and the first groove 40a and the second groove 50a are configured to fit at the beginning and end ends of the absorber 200.

[0116] In the description of this specification, references to terms such as "some embodiments," "optionally," "furthermore," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0117] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A method for welding multi-segment absorbers, the method being applied to a multi-segment absorber electron beam welding apparatus, characterized in that, The absorber comprises multiple rings arranged sequentially along the axial direction of the absorber. The multi-section absorber electron beam welding device includes: a mounting platform, a rotating mechanism, a tail top seat, a head support, a tail support, and an intermediate support. The rotating mechanism and the tail top seat are spaced apart on the mounting platform. A pin is provided at the end of the tail top seat near the rotating mechanism. The head support is clamped and connected to the end of the rotating mechanism near the tail top seat and can be driven to rotate by the rotating mechanism. A first groove is provided at the end of the head support facing the tail top seat. The tail... The support member has a second groove and a pin groove at opposite ends, the second groove and the first groove facing each other, and the pin groove is fitted onto the pin; the intermediate support member is located between the head support member and the tail support member, the intermediate support member includes a lifting seat, a rolling element and a support ring sleeve, the lifting seat is located on the mounting platform, the rolling element is located on the lifting seat and supported by the bottom of the support ring sleeve; wherein, the support ring sleeve is configured to fit over the absorber, the first groove and the second groove are configured to fit into the head and tail ends of the absorber, and the welding method includes: The multiple rings are welded in batches of two; The first ring group is assembled on the multi-section absorber electron beam welding device, and the ring body is supported by the intermediate support member, and the center of all the ring bodies is kept at the same height by the lifting seat. The multi-segment absorber electron beam welding device and the first ring assembly were placed together in the vacuum chamber of the electron beam welding machine and a vacuum was drawn. The first ring assembly is welded, and the welding operation includes first positioning welding and then deep penetration welding. The positioning welding includes: driving the first ring group to rotate, controlling the electron beam current of electron beam welding to 30mA to 60mA, the focusing current to 2280 mA to 2410mA, the welding speed to 5mm / s to 10mm / s, and welding with a circular wave waveform during the rotation process; The deep penetration welding includes: driving the first ring group to rotate, controlling the electron beam current of electron beam welding to 240mA to 300mA, the focusing current to 2230mA to 2360mA, the welding speed to 5mm / s to 10mm / s, and welding with a circular wave waveform during the rotation process; After the welding of the first ring group is completed, the multi-section absorber electron beam welding device is taken out of the vacuum chamber, then the first ring group is removed, the next ring group is assembled onto the multi-section absorber electron beam welding device, and after the assembly is completed, it is put back into the vacuum chamber to perform the welding operation on the next ring group. After the next ring group is welded, two adjacent ring groups are assembled onto the multi-section absorber electron beam welding device for electron beam welding, and the welding operation is performed. This process is repeated to complete the welding of the absorber.

2. The welding method for a multi-segment absorber according to claim 1, characterized in that, The mounting platform is provided with a slide rail that extends along the interval between the rotating mechanism and the tail top seat. The bottoms of the rotating mechanism and the tail top seat are fitted on the slide rail and can be slidably adjusted along the extension direction of the slide rail.

3. The welding method for multi-segment absorbers according to claim 2, characterized in that, There are multiple intermediate support members, and the bottom of the lifting seat of the multiple intermediate support members is fitted on the slide rail, and can be slidably adjusted along the extension direction of the slide rail.

4. The welding method for a multi-segment absorber according to claim 1, characterized in that, The head support member has a first protrusion at one end near the rotating mechanism. The rotating mechanism has a rotating end, and the rotating end is provided with a chuck. The chuck clamps the first protrusion.

5. The welding method for a multi-segment absorber according to claim 1 or 4, characterized in that, The tail support member has a second protrusion at one end near the tail top seat, and the ejector pin groove is a conical groove located on the second protrusion.

6. The welding method for a multi-segment absorber according to claim 1, characterized in that, The head support and the tail support are disc-shaped, and the first groove and the second groove are circular grooves.

7. The welding method for a multi-segment absorber according to claim 1, characterized in that, The outer ring of the support ring is provided with a limiting groove, which is annular in the circumferential direction of the support ring, and the rolling element is fitted in the limiting groove.

8. The welding method for a multi-segment absorber according to claim 7, characterized in that, The rotating mechanism and the tail top seat are spaced apart along a first direction. The lifting seat has two extension arms that extend away from the mounting platform and are spaced apart along a second direction perpendicular to the second direction. Each extension arm is provided with the rolling element. The second direction is perpendicular to the first direction.

9. The welding method for a multi-segment absorber according to claim 7 or 8, characterized in that, The support ring sleeve includes two semicircular sleeves, which are detachably connected. Each semicircular sleeve is provided with a semi-circular groove, and the two semi-circular grooves together form the limiting groove.

10. The welding method for a multi-segment absorber according to claim 1, characterized in that, The welding operation also includes performing finishing welding after the deep penetration welding is completed. The finishing welding includes: driving the ring assembly to rotate, controlling the electron beam current of the electron beam welding to 20mA to 40mA, controlling the focusing current to 2180 to 2310mA, setting the frequency to 10Hz to 40Hz, and welding with a circular wave waveform.

11. The welding method for a multi-segment absorber according to claim 1, characterized in that, Prior to the step of welding the plurality of rings in batches of two, the welding method further includes: One of any two adjacent ring bodies is provided with an annular boss, and the other is provided with an annular groove, with the annular groove and the annular boss cooperating with each other.

12. The welding method for a multi-segment absorber according to claim 1, characterized in that, Each ring body is provided with multiple through holes, which are spaced apart circumferentially along the ring body and penetrate the ring body axially; the step of assembling the first ring group on the multi-section absorber electron beam welding device includes: The ring body at one end of the first ring group is installed in the first groove of the head support member; The ring body at the other end of the first ring group is installed in the second groove of the tail support; A plug is installed in the through hole of one of the two ring bodies in the first ring group, and the plug is inserted into the through hole of the other ring body during the assembly of the two ring bodies.

13. The welding method for a multi-segment absorber according to claim 12, characterized in that, After completing the welding of the first ring group, the multi-section absorber electron beam welding device is removed from the vacuum chamber, then the first ring group is disassembled, the next ring group is assembled onto the multi-section absorber electron beam welding device, and after assembly, it is placed back into the vacuum chamber to perform the welding operation on the next ring group. Following this step, the process further includes: Remove the plug from the through hole in the ring assembly and machine the through hole.

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