Preparation System and Preparation Method for Radioactive Impact Samples

Abstract

Embodiments of the present application relate to the technical field of impact sample preparation, and particularly to a preparation system and a preparation method for radioactive impact samples, which are used to reassemble a main body section formed by cutting the head of a radioactive impact sample and two end splicing sections into a new radioactive impact sample. The preparation system includes: a fixing device for respectively arranging the two end splicing sections at both ends of the main body section and fixing the relative positions between the two end splicing sections and the main body section; a welding device for welding the main body section and the two end splicing sections fixed by the fixing device to form a blank of the radioactive impact sample; and a processing device for processing the blank to form the radioactive impact sample. The welding device includes a temperature measurement component for measuring the temperature of the main body section during welding. Embodiments of the present application are beneficial to enabling the reconstructed radioactive impact sample to accurately reflect the performance of the original radioactive impact sample.

Description

Technical Field

[0001] This application relates to the technical field of impact sample preparation, and particularly relates to a preparation system and a preparation method for radioactive impact samples. Background Art

[0002] This part of the content only provides background information related to this application and does not necessarily constitute prior art.

[0003] In the Charpy impact test of metal materials, the metal specimen usually breaks at the notch after being impacted, forming two impact sample broken ends. In order to make full use of the specimen, the impact sample reconstruction technology can be used to obtain new impact samples again.

[0004] The impact sample reconstruction technology specifically refers to the technology of reassembling the tested impact sample broken ends to form a specimen blank, and then processing the specimen blank into an impact sample for retesting. This technology can significantly improve the utilization efficiency of impact samples and obtain more impact test data. Currently, there is no preparation system for preparing the broken ends of radioactive impact samples into new radioactive impact samples. Summary of the Invention

[0005] A brief overview of this application is given below to provide a basic understanding of certain aspects of this application. It should be understood that this overview is not an exhaustive overview of this application. It is not intended to identify the key or important parts of this application, nor is it intended to limit the scope of this application. Its purpose is only to present certain concepts in a simplified form as a prelude to the more detailed description that follows.

[0006] In view of the above technical problems, the embodiments of this application provide a preparation system and a preparation method for radioactive impact samples.

[0007] In a first aspect, the embodiments of this application provide a preparation system for radioactive impact samples, which is used to reassemble the main body section formed by processing the broken ends of radioactive impact samples and two end splicing sections into a new radioactive impact sample. The preparation system includes: a fixing device, which is used to respectively arrange the two end splicing sections at both ends of the main body section and fix the relative positions between the two end splicing sections and the main body section; a welding device, which is used to weld the main body section and the two end splicing sections fixed by the fixing device to form a blank of the radioactive impact sample; a processing device, which is used to process the blank to form a radioactive impact sample. Among them, the welding device includes a temperature measurement component, which is used to measure the temperature of the main body section during welding.

[0008] Second aspect, embodiments of the present application further provide a method for preparing a radioactive impact sample, which is used to reassemble the broken head of the radioactive impact sample and two end splicing segments into a new radioactive impact sample. The preparation method includes: cutting off the two end portions on both sides of the broken head to form a main body segment; splicing the main body segment and the two end splicing segments in a preset manner; fixing the relative positions between the two end splicing segments and the main body segment; welding the main body segment and the two end splicing segments to form a blank of the radioactive impact sample, wherein during the welding process, the temperature of the main body segment is measured, and whether the blank of the radioactive impact sample is qualified is judged according to the measured temperature; when the blank of the radioactive impact sample is qualified, the welded blank is processed to form a radioactive impact sample.

[0009] Embodiments of the present application can reassemble the broken head of the radioactive impact sample into a new radioactive impact sample. By setting a temperature measurement component in the embodiments of the present application, it is beneficial to enable the reconstructed radioactive impact sample to accurately reflect the performance of the original radioactive impact sample.

[0010] These and other advantages of the present application will become more obvious through the following detailed description of the preferred embodiments of the present application in conjunction with the accompanying drawings. Description of the Drawings

[0011] In order to further elaborate the above and other advantages and features of the present application, the following provides a more detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings. The accompanying drawings are included in this specification and form a part of this specification together with the following detailed description. Elements with the same function and structure are denoted by the same reference numerals. It should be understood that these drawings only depict typical examples of the present application and should not be regarded as limiting the scope of the present application.

[0012] Figure 1 is a schematic structural diagram of a processing device for a radioactive impact sample according to an embodiment of the present application;

[0013] Figure 2 is Figure 1 a schematic structural diagram of the blank holder shown;

[0014] Figure 3 is a partial schematic structural diagram of a cutting device according to an embodiment of the present application;

[0015] Figure 4 is Figure 3 an enlarged schematic diagram of a cutting auxiliary clamping member in the cutting device shown;

[0016] Figure 5 is Figure 4 a schematic structural diagram of the cutting auxiliary clamping member when not clamping the blank shown;

[0017] Figure 6 is Figure 5 a schematic structural view of an auxiliary clamping portion of the cutting auxiliary clamping member shown;

[0018] Figure 7 is Figure 4 a top view of the cutting auxiliary clamping member shown;

[0019] Figure 8 is Figure 4 a side view of the cutting auxiliary clamping member shown;

[0020] Figure 9 is Figure 1 a partially enlarged view of a blank transfer member in a processing system of a radioactive impact sample shown;

[0021] Figure 10 is a schematic flow chart for cutting a blank of a radioactive impact sample to obtain a radioactive impact sample according to an embodiment of the present application;

[0022] Figure 11 is a schematic structural view of an electron beam welding device according to an embodiment of the present application;

[0023] Figure 12 is Figure 11 a schematic structural view of the electron beam welding device from another angle shown;

[0024] Figure 13 is Figure 12 a partially enlarged schematic view of the electron beam welding device shown;

[0025] Figure 14 is Figure 13 a further partially enlarged schematic view of the electron beam welding device shown;

[0026] Figure 15 is a partial cross-sectional view of a temperature measurement component according to an embodiment of the present application;

[0027] Figure 16 is a schematic structural view of fixing a main body section and an end splicing section by a welding fixture according to an embodiment of the present application;

[0028] Figure 17 is a schematic structural view of a tightening device according to an embodiment of the present invention.

[0029] It should be noted that the drawings are not necessarily drawn to scale, but are only shown in a schematic manner that does not affect the reader's understanding.

[0030] Explanation of reference numerals:

[0031] 101. Platform; 1011. Fixture holding mechanism; 1020. Top surface tightening mechanism; 1030. First side surface tightening mechanism; 1040. Second side surface tightening mechanism;

[0032] 10. Vacuum chamber; 11. Chamber main body; 12. Chamber cover; 121. Sealing part; 13. Window;

[0033] 20. Electron gun; 21. First mounting plate; 211. Sliding mounting part; 22. Second mounting plate; 221. Sliding mounting mating part; 23. Driving part;

[0034] 30. Support platform; 301. Support body; 302. Sliding mating part; 31. Moving platform; 311. Moving body; 312. Sliding part; 32. Fixed platform;

[0035] 40. Temperature measurement component; 41. Protective part; 42. Holding part; 420. Holding body; 421. Mounting part; 422. Positioning part; 43. Temperature measurement element; 44. Rotating part; 441. Rotating body; 442. Rotating bracket; 443. Rotating shaft; 444. Sliding bearing; 445. Sliding connection part; 446. Chute;

[0036] 50. Welding fixture; 51. Pressing part; 52. Bottom plate; 53. Frame; 531. First threaded fastener; 532. Second threaded fastener; 533. Third threaded fastener;

[0037] 60. Blank; 61. Main body section; 611. First surface; 612. Second surface; 62. Splicing main body section; 621. First end splicing section; 6211. First splicing surface; 622. Second end splicing section; 6221. Second splicing surface; 63. Splicing auxiliary section; 64. Weld seam;

[0038] 71. Blank holding part; 711. Blank holding body; 712. Moving part;

[0039] 80. Cutting device; 81. Cutting auxiliary clamping part; 811. Auxiliary body; 812. Auxiliary rotating part; 8130. Receiving groove;

[0040] 813. Auxiliary clamping part; 8131. Extension section; 8132. First clamping section; 81321. Relief groove; 8133. Second clamping section; 81331. Through groove;

[0041] 82. Cutting part;

[0042] 90. Blank transfer member; 910. Installation base; 91. Robot arm; 911. First rotating member; 912. First connecting arm; 913. Second rotating member; 914. Second connecting arm; 915. Third rotating member; 916. Telescopic arm; 917. Fourth rotating member; 918. Transfer clamping rotating member; 92. Transfer clamping member; 921. Jaw. Detailed implementation manners

[0043] In the following, exemplary embodiments of the present application will be described in conjunction with the accompanying drawings. For clarity and conciseness, not all features of the actual implementation manners are described in the specification. However, it should be understood that many implementation-specific decisions must be made during the development of any such actual embodiment in order to achieve the specific goals of the developer, for example, to comply with those limitations related to the system and business, and such limitations may vary with different implementation manners. In addition, it should also be understood that although the development work may be very complex and time-consuming, for those skilled in the art who benefit from the content of the present application, such development work is only a routine task.

[0044] Here, it should also be noted that in order to avoid obscuring the present application due to unnecessary details, only the device structures and / or processing steps closely related to the solution of the present application are shown in the drawings, while other details less related to the present application are omitted.

[0045] It should be noted that unless otherwise defined, the technical terms or scientific terms used in the present application should have the ordinary meanings understood by those with ordinary skills in the field to which the present application belongs.

[0046] In the description of the embodiments of the present application, the meaning of "a plurality" is at least two, for example, two, three, etc., unless otherwise specifically defined.

[0047] The embodiments of the present application provide a preparation system for radioactive impact samples, which is used to reassemble the main body segment formed by processing the broken head of the radioactive impact sample and two end splicing segments into a new radioactive impact sample. The preparation system includes: a processing device, a fixing device, and a welding device. The fixing device is used to respectively arrange the two end splicing segments at both ends of the main body segment and fix the relative positions between the two end splicing segments and the main body segment. The welding device is used to weld the main body segment and the two end splicing segments fixed by the fixing device to form a blank of the radioactive impact sample. The processing device is used to process the blank to form a radioactive impact sample. The embodiments of the present application can reassemble the broken head of the radioactive impact sample into a new radioactive impact sample.

[0048] The inventors of the present application found that when using the reconstructed radioactive shock sample for testing, in some cases, the measurement results of the reconstructed radioactive shock sample were significantly different from the measurement results of the radioactive shock sample before reconstruction. The inventors of the present application further found that when welding the main section and the end splicing section, due to the selection of welding parameters, the temperature of the middle part of the main section was too high during welding, thereby changing some performance of the main section, resulting in a large difference between the measurement results and the original radioactive shock sample, so that the reconstructed radioactive shock sample cannot accurately reflect the performance of the original radioactive shock sample.

[0049] Therefore, in order to address the technical problem that the reconstructed radioactive shock sample cannot accurately reflect the performance of the original radioactive shock sample, in some embodiments, the welding device includes a temperature measurement component for measuring the temperature of the main section during welding.

[0050] Regarding the use of welding technology to splice and reassemble a small number of radioactive samples into a Charpy V-type impact sample that can be subjected to an impact test, the inventor of the present application has found that in order to avoid affecting the performance of the radioactive impact sample, thereby causing inaccurate results when conducting an impact test on the prepared radioactive impact sample, it is necessary to avoid excessively high temperatures in the middle of the main section 61 during welding. Therefore, the embodiment of the present application provides a temperature measurement component in the welding device to measure the temperature of the main section 61 during welding, which is conducive to ensuring the quality of the blank 60 of the welded radioactive impact sample, avoiding changes in the performance of the main section 61, and allowing the reconstructed radioactive impact sample to accurately reflect the performance of the original radioactive impact sample.

[0051] In the embodiment of the present application, by measuring the temperature of the main section 61, on the one hand, it is helpful to adjust the welding parameters so as to try to make the temperature of the main section 61 not exceed the preset temperature during welding; on the other hand, if the temperature exceeds the preset temperature during the welding process, it is possible to directly judge that the formed radioactive impact sample blank 60 is an unqualified blank 60, and no subsequent operations are performed, thereby saving time costs and avoiding subsequent invalid operations.

[0052] In some embodiments, Figure 10 , Figure 14 and Figure 16As shown, the end splicing section may include a splicing body section 62 and two splicing auxiliary sections 63. The two splicing auxiliary sections 63 are located on both sides of the splicing body section 62. When welding the end splicing section to the main body section 61, the splicing auxiliary sections 63 can provide starting and ending positions for the weld seam 64 to ensure the welding quality. After welding is completed, the integrated structure formed by welding the four splicing auxiliary sections 63, the two splicing body sections 62, and the main body section 61 is the blank 60 of the radioactive impact sample. The four splicing auxiliary sections 63, the two splicing body sections 62, and the main body section 61 can be referred to as the welded base materials.

[0053] In some embodiments, as Figures 1 to 3 shown, the processing system may include a blank holder 71, a cutting device 80, and a blank transfer member 90.

[0054] The blank holder 71 can be configured to hold any one of the end splicing sections of the blank 60. For the sake of distinction, the two end splicing sections of the blank 60 are respectively referred to as the first end splicing section 621 and the second end splicing section 622. The structures and materials of the first end splicing section 621 and the second end splicing section 622 can be exactly the same.

[0055] Specifically, the blank holder 71 can be configured to hold the first end splicing section 621 of the blank 60. The cutting device 80 may include a cutting auxiliary clamp 81 and a cutting member 82. The cutting auxiliary clamp 81 can be configured to clamp the main body section 61 of the blank 60. The blank transfer member 90 can be configured to clamp the second end splicing section 622 of the blank 60 to transfer the blank 60 from the blank holder 71 to the cutting auxiliary clamp 81. The cutting member 82 is configured to cut the main body section 61, the first end splicing section 621, and the second end splicing section 622 of the blank 60 clamped by the cutting auxiliary clamp 81 to form a radioactive impact sample.

[0056] The embodiment of the present application uses the blank holder 71 to hold the first end splicing section 621 of the blank 60, which can perform initial positioning on the blank 60 to facilitate the blank transfer member 90 to clamp the blank 60. Through the mutual cooperation among the blank holder 71, the cutting device 80, and the blank transfer member 90, the blank 60 of the radioactive impact sample formed by welding can be sent to the cutting device 80 for cutting into a radioactive impact sample.

[0057] In some embodiments, the cutting device 80 can be a wire electrical discharge machining machine, and the cutting member 82 can be an electrode wire. In some embodiments, the cutting device 80 can be a slow wire electrical discharge machining machine.

[0058] In some embodiments, the electrode wire can be a molybdenum wire with a diameter equal to 0.2 mm.

[0059] In some embodiments, the processing system may include a blank holding platform for mounting the blank holder 71.

[0060] In some embodiments, the blank holder 71 may include a blank holding body 711 and a plurality of moving members 712 disposed on the blank holding body 711. The plurality of moving members 712 are movably disposed on the blank holding body 711 to jointly hold the blank 60 by abutting against the first end splicing section 621 of the blank 60.

[0061] In the embodiments of the present application, by abutting the plurality of moving members 712 disposed on the blank holding body 711 against the first end splicing section 621 of the blank 60 to hold the blank 60, the held blank 60 is not likely to shake, and at the same time, it is convenient for the blank transfer member 90 to clamp the second end splicing section 622 to transfer the blank 60 away.

[0062] In some embodiments, the blank holder 71 may include four moving members 712. The four moving members 712 may be disposed on the blank holding body 711 in pairs opposite to each other and are respectively used to abut against the four side surfaces of the first end splicing section 621.

[0063] In some embodiments, the blank holder 71 may be a chuck, and the moving member 712 may be a chuck jaw in the chuck.

[0064] In some embodiments, as Figure 1 shown, the blank transfer member 90 may include a robotic arm 91 and a transfer gripper 92 disposed at the end of the robotic arm 91. The transfer gripper 92 is used to grip the second end splicing section 622 of the blank 60. The robotic arm 91 has a plurality of degrees of freedom and is configured to be able to drive the transfer gripper 92 to move to a position facing the blank holder 71 to transfer the blank 60 from the blank holder 71 to the transfer gripper 92; and to be able to drive the transfer gripper 92 to move to a position facing the cutting auxiliary gripper 81 to transfer the blank 60 to the cutting auxiliary gripper 81.

[0065] In the embodiments of the present application, through the robotic arm 91 with a plurality of degrees of freedom and the transfer gripper 92 disposed at the end of the robotic arm 91, the robotic arm 91 can be rotated to different positions, thereby realizing the transfer of the blank 60 between the blank holder 71, the transfer gripper 92, and the cutting auxiliary gripper 81, with relatively high flexibility, and at the same time, it can also stably and safely transfer the blank 60 to ensure that the blank 60 can be smoothly processed.

[0066] In some embodiments, referring to Figure 1 and Figure 9, the green body transfer member 90 may further include a mounting base 910 for mounting the robotic arm 91. The robotic arm 91 may include a first rotating member 911, a first connecting arm 912, a second rotating member 913, a second connecting arm 914, a third rotating member 915, a telescopic arm 916, a fourth rotating member 917, and a transfer clamping rotating member 918. The first rotating member 911 is rotatably connected to the mounting base 910, and the first connecting arm 912 is connected to the first rotating member 911. The first rotating member 911 drives the first connecting arm 912 to rotate around the vertical axis relative to the mounting base.

[0067] The second connecting arm 914 is connected to the first connecting arm 912 through the second rotating member 913. The second rotating member 913 drives the second connecting arm 914 to rotate around the first horizontal axis. The telescopic arm 916 is connected to the second connecting arm 914 through the third rotating member 915. The third rotating member 915 drives the telescopic arm 916 to rotate around the second horizontal axis. The transfer clamping rotating member 918 is connected to the telescopic arm 916 through the fourth rotating member 917. The fourth rotating member 917 drives the transfer clamping rotating member 918 to rotate around the third horizontal axis. The third horizontal axis, the second horizontal axis, and the first horizontal axis are parallel. The transfer clamping member 92 is connected to the transfer clamping rotating member 918. The transfer clamping rotating member 918 is used to drive the transfer clamping member 92 to rotate around the fourth horizontal axis, and the fourth horizontal axis is perpendicular to the first horizontal axis. In such an embodiment, the green body transfer member 90 can transfer the green body 60 from the green body holding member 71 to the cutting auxiliary clamping member 81, and it can precisely control the angle and distance between the transfer clamping member 92 and the cutting auxiliary clamping member 81, so that the cutting member 82 can precisely process the green body 60 clamped by the cutting auxiliary clamping member 81.

[0068] In some embodiments, the transfer clamping member 92 may include two oppositely arranged jaws 921 for clamping the second end splicing section 622 of the green body 60.

[0069] In some embodiments, the green body transfer member 90 is also configured to transfer the formed radioactive impact sample to the green body holding member 71.

[0070] In some embodiments, as Figures 4 to 8 shown, the cutting auxiliary clamping member 81 may include an auxiliary body 811, an auxiliary rotating portion 812 provided on the auxiliary body 811, and two auxiliary clamping portions 813 oppositely arranged on the auxiliary body 811. The two auxiliary clamping portions 813 may be configured to clamp the main body section 61 of the green body 60. The auxiliary rotating portion 812 may be used to drive the two auxiliary clamping portions 813 to rotate.

[0071] In an embodiment of the present application, the auxiliary rotating part 812 drives the two auxiliary clamping parts 813 to rotate, so that during the rotation of the two auxiliary clamping parts 813, the clamped blank 60 can follow the rotation, facilitating the cutting of different surfaces of the blank 60 respectively.

[0072] In some embodiments, as Figures 4 to 8 shown, the auxiliary clamping part 813 may include an extension section 8131 and a first clamping section 8132. The first clamping section 8132 is connected to the extension section 8131. The first clamping section 8132 can be used to clamp the main body section 61 of the blank 60. When the two first clamping sections 8132 clamp the main body section 61 of the blank 60, the two extension sections 8131, together with the auxiliary body 811 and the first clamping section 8132, form a receiving groove 8130. The first end splicing section 621 is located between the two extension sections 8131, and the second end splicing section 622 is located outside the receiving groove 8130. There is a gap between the first end splicing section 621 and the auxiliary body 811, the first clamping section 8132, and the extension section 8131, so that the cutting member 82 can enter the gap to cut the first end splicing section 621.

[0073] In an embodiment of the present application, by arranging the extension section 8131 and the first clamping section 8132 such that there is a gap between the first end splicing section 621 and the auxiliary body 811, the first clamping section 8132, and the extension section 8131, when clamping the main body section 61 of the blank 60, the cutting member 82 can not only cut the second end splicing section 622, but also cut the first end splicing section 621, without the need to change the clamping direction of the auxiliary clamping part 813 to the blank 60, and the cutting efficiency is relatively high.

[0074] In some embodiments, the two auxiliary clamping parts 813 can be relatively arranged on the auxiliary body 811, and the structures of the two auxiliary clamping parts are the same. In some embodiments, the auxiliary clamping part 813 may include an extension section 8131 and a first clamping section 8132, and the first clamping section 8132 is connected to the extension section 8131.

[0075] In some embodiments, the first clamping sections 8132 of the two auxiliary clamping parts 813 can clamp the middle part of the main body section 61 of the blank 60 to ensure that there are gaps between the first end splicing section 621 and the auxiliary body 811, the first clamping section 8132, and the extension section 8131 respectively.

[0076] In some embodiments, the distance between the two extension segments 8131 may be greater than the width of the first end splicing segment 621; the distance between the auxiliary body 811 and the first clamping segment 8132 may be greater than the length of the first end splicing segment 621; the width of the extension segment 8131 of the auxiliary clamping portion 813 may be less than or equal to the width of the main body segment 61. This is beneficial for the cutting member 82 to cut the first end splicing segment 621.

[0077] In some embodiments, the width of the first clamping segment 8132 of the auxiliary clamping portion 813 may be less than or equal to the width of the main body segment 61 so as not to affect the cutting member 82 from cutting the first end splicing segment 621.

[0078] In some embodiments, the main body segment 61 may include two relatively arranged first surfaces 611 and two relatively arranged second surfaces 612. One of the second surfaces 612 is used to form a V-shaped notch. The auxiliary clamping portion 813 may further include a second clamping segment 8133. The second clamping segment 8133 is connected to the first clamping segment 8132. The second clamping segments 8133 of the two auxiliary clamping portions 813 extend in opposite directions from their respective first clamping segments 8132 so that the two second clamping segments 8133 are staggered from each other. When the two first clamping segments 8132 and the two second clamping segments 8133 clamp the main body segment 61 of the blank 60, the two relatively arranged first surfaces 611 of the main body segment 61 face the two first clamping segments 8132 respectively, and the two relatively arranged second surfaces 612 face the two second clamping segments 8133 respectively.

[0079] By providing the second clamping segment 8133 in the embodiments of the present application, it can be ensured that the two relatively arranged first surfaces 611 and the two relatively arranged second surfaces 612 of the main body segment 61 are clamped by the first clamping segment 8132 and the second clamping segment 8133 of the two auxiliary clamping portions 813 respectively. In this way, during the rotation process, it can be ensured that the blank 60 will not slide or fall, reducing the rotation error, and further ensuring the stability of the processing process.

[0080] In some embodiments, the second surface 612 for forming the V-shaped notch is the same surface as the surface with the V-shaped notch in the broken head of the radioactive impact sample before reconstruction, which is beneficial for ensuring that the performance of the reconstructed radioactive impact sample is the same as that of the radioactive impact sample before reconstruction.

[0081] In some embodiments, the first end splicing segment 621 and the second end splicing segment 622 respectively include two first splicing surfaces 6211 on the same side as the two first surfaces 611 and two second splicing surfaces 6221 on the same side as the two second surfaces 612. The first splicing surface 6211 and the second splicing surface 6221 protrude from the first surface 611 and the second surface 612 of the main body segment 61 respectively.

[0082] In some embodiments, a through groove 81331 is formed on the surface of the second clamping section 8133 facing the main body section 61; when the two first clamping sections 8132 and the two second clamping sections 8133 clamp the main body section 61 of the blank 60, a second gap is formed between the position of the second clamping section 8133 corresponding to the through groove 81331 and a lateral surface of the main body section 61, so that the cutting member 82 can enter the second gap to cut a V-shaped notch on the main body section 61.

[0083] The embodiments of the present application utilize the through groove 81331 on the second clamping section 8133, which can enable the cutting member 82 to enter the second gap and then cut a V-shaped notch on the main body section 61. In this way, during the processing, when clamping the main body section 61 of the blank 60, the cutting member 82 can cut a V-shaped notch on the main body section 61 of the blank 60, with relatively high cutting efficiency and simple operation.

[0084] In some embodiments, the two first clamping sections 8132 respectively form relief grooves 81321; when the two first clamping sections 8132 and the two second clamping sections 8133 clamp the main body section 61 of the blank 60, the relief grooves 81321 of the two first clamping sections 8132 coincide, so that the cutting member 82 can enter the relief grooves 81321 of the two first clamping sections 8132 after entering the second gap, thereby cutting a V-shaped notch on the main body section 61.

[0085] The embodiments of the present application facilitate cutting a V-shaped notch on the main body section 61 by forming the relief groove 81321 on the first clamping section 8132.

[0086] It is easy to understand that for the two auxiliary clamping portions 813, the extension sections 8131 and the structures of the first clamping sections 8132 are exactly the same, and the second clamping sections 8133 are oppositely arranged. The positions of the two relief grooves 81321 of the two auxiliary clamping portions 813 on the two first clamping sections 8132 are different.

[0087] For the sake of easy distinction, one of the auxiliary clamping portions 813 is referred to as the first auxiliary clamping portion 813, and the other auxiliary clamping portion 813 is referred to as the second auxiliary clamping portion 813. In some embodiments, a relief groove 81321 can be formed on the side of the first clamping section 8132 of the first auxiliary clamping portion 813 away from the second clamping section 8133. A relief groove 81321 can be formed on the side of the first clamping section 8132 of the second auxiliary clamping portion 813 close to the second clamping section 8133.

[0088] When the first clamping segments 8132 of the first auxiliary clamping portions 813, the first clamping segments 8132 of the second auxiliary clamping portions 813, the second clamping segments 8133 of the first auxiliary clamping portions 813, and the second clamping segments 8133 of the second auxiliary clamping portions 813 clamp the main body segment 61 of the blank 60, the relief grooves 81321 of the two first clamping segments 8132 can coincide.

[0089] In some embodiments, as Figure 10 shown, when the two auxiliary clamping portions 813 clamp the blank 60, the cutting member 82 can be used to cut the two second splicing surfaces 6221 of the second end splicing segment 622 of the blank 60 in sequence. Then, the two auxiliary clamping portions 813 are rotated 90 degrees, and the first splicing surface 6211 of the second end splicing segment 622 of the blank 60 is cut in sequence. Then, the first end splicing segment 621 of the blank 60 is cut by a similar cutting method, and finally a V-shaped notch is cut on the second surface 612 of the main body segment 61 to finally obtain a radioactive impact sample.

[0090] For the cutting auxiliary clamping member 81 having the above structure, the cutting auxiliary clamping member 81 can be used to clamp the broken head, and the cutting member 82 is used to cut the end in the length direction of the broken head.

[0091] It may include an auxiliary body 811, an auxiliary rotating portion 812 provided on the auxiliary body 811, and two auxiliary clamping portions 813 oppositely provided on the auxiliary body 811. The two auxiliary clamping portions 813 can be arranged to clamp the main body segment 61 of the blank 60. The auxiliary rotating portion 812 can be used to drive the two auxiliary clamping portions 813 to rotate.

[0092] In some embodiments, the fixing device includes: a welding jig. Refer to Figure 16 , the welding jig 50 includes a jig body and a plurality of threaded fasteners. The jig body is used to provide a space for splicing the main body segment 61 and the two end splicing segments, and the threaded fasteners are used to press the main body segment 61 and the two end splicing segments against the jig body.

[0093] In some embodiments, as Figure 16 shown, the jig body may include a plurality of pressing members 51, a frame 53, and a bottom plate 52. The frame 53 is connected to the bottom plate 52 to jointly form a base material receiving groove for arranging the welding base material. The pressing member 51 is used to press the welding base material against the bottom plate 52 at the top of the frame 53 to prevent the welding base material from shaking during welding and affecting the welding quality. The frame 53 can be an integral structure. In some embodiments, the extending direction of the pressing member 51 can be the same as the extending direction of the weld (i.e., the same as the width direction of the main body segment 61).

[0094] In some embodiments, the welding device may be an electron beam welding device.

[0095] In some embodiments, as Figure 12 and Figure 13 shown, the electron beam welding device may include a main body portion, an electron gun 20, a moving platform 31, and a temperature measurement component 40. The main body portion is configured to form a vacuum chamber 10. The electron gun 20 can be used to provide an electron beam to the vacuum chamber 10. The moving platform 31 can be used to mount a welding fixture 50 and is configured to be able to drive the welding fixture 50 to translate within the vacuum chamber 10 to weld a base material to be welded using the electron beam. The temperature measurement component 40 can be used to measure the temperature of the main body section 61 within the welding fixture 50 during welding.

[0096] In some embodiments, as Figure 11 shown, the main body portion may include a chamber main body 11 and a chamber cover 12. An opening is formed on one side of the chamber main body 11, and the chamber cover 12 can be used to seal the opening of the chamber main body 11 to jointly form the vacuum chamber 10 with the chamber main body 11. The chamber main body 11 may be provided with a window 13 for observing the welding process. The electron gun 20 may be disposed above the chamber main body 11. The moving platform 31 and the temperature measurement component 40 may be disposed on the chamber cover 12.

[0097] In some embodiments, the chamber cover 12 may slide relative to the chamber main body 11 to seal or open the opening of the chamber main body 11. A sealing portion 121 may be provided on the side of the chamber cover 12 facing the chamber main body 11 to ensure the sealing of the vacuum chamber 10.

[0098] When the chamber cover 12 seals the opening of the chamber main body 11, the moving platform 31 and the temperature measurement component 40 enter the chamber main body 11 to be able to weld the main body section 61 and the end splicing section using the electron beam provided by the electron gun 20. When the chamber cover 12 opens the opening of the chamber main body 11, the moving platform 31 and the temperature measurement component 40 are removed from the chamber main body 11, so that the welding fixture 50 can be mounted on or removed from the moving platform 31.

[0099] In some embodiments, the electron beam welding device may further include a support platform 30. The support platform 30 may be connected to the opening side of the chamber cover 12 facing the chamber body 11. During the process of sealingly connecting the chamber cover 12 to the chamber body 11, the support platform 30 on the chamber cover 12 can move along with the chamber cover 12 and thus enter the vacuum chamber 10. A moving platform 31 may be disposed on the support platform 30 and is slidably connected to the support platform 30. During welding, the moving platform 31 can move relative to the support platform 30 so that the electron beam can be aligned with the gap between the main body section 61 and each end splicing section and can move along the extending direction of the gap, thereby completing the welding using the electron beam. After the welding is completed, a weld seam can be formed at the position corresponding to the gap. When it is necessary to weld another weld seam after the current weld seam is welded, the moving platform 31 can move relative to the support platform 30 in a first direction perpendicular to the extending direction of the weld seam.

[0100] In some embodiments, the moving platform 31 may include a moving body 311 and a sliding portion 312. The support platform 30 may include a support body 301 and a sliding mating portion 302. The extending directions of the sliding mating portion 302 and the sliding portion 312 may be parallel to the extending direction of the weld seam in the embodiments of the present application. By connecting the sliding mating portion 302 to the sliding portion 312, the moving body 311 can be slidably disposed on the support body 301. Exemplarily, the sliding mating portion 302 may be a slide rail and the sliding portion 312 may be a sliding groove.

[0101] In some embodiments, the electron gun 20 is arranged to be movable relative to the chamber body 11 so that the electron beam can be aligned with the gap between the main body section 61 and each end splicing section. It is easy to understand that the moving direction of the electron gun 20 relative to the chamber body 11 may be perpendicular to the moving direction of the moving platform 31 relative to the support platform 30.

[0102] In some embodiments, as Figure 12 shown, the electron beam welding device may include a first mounting plate 21, a second mounting plate 22, and a driving portion 23. The electron gun 20 is connected to the first mounting plate 21, the second mounting plate 22 is connected to the chamber body 11, the first mounting plate 21 and the second mounting plate 22 can slide relative to each other, and the driving portion 23 is used to drive the first mounting plate 21 to slide relative to the second mounting plate 22.

[0103] A sliding mounting portion 211 is formed on the first mounting plate 21. The second mounting plate 22 may form a sliding mounting mating portion 221 for mating with the sliding mounting portion 211, so that the first mounting plate 21 can slide relative to the second mounting plate 22 through the sliding fit between the sliding mounting portion 211 and the sliding mounting mating portion 221.

[0104] In some embodiments, the electron beam welding device may further include a frame. The frame can be used to mount the chamber body 11 and the chamber cover 12. The chamber cover 12 can be slidably disposed on the frame.

[0105] In some embodiments, referring to Figure 15 , the temperature measurement assembly 40 may include a plurality of temperature measurement elements 43 and a plurality of protection members 41. The plurality of temperature measurement elements 43 are used to abut against the main body section 61 to measure the temperature of the main body section 61. Each temperature measurement element 43 extends within a protection member 41 and protrudes from the protection member 41. Each protection member 41 can be used to prevent the sputtering beam formed during electron beam welding from contacting the corresponding temperature measurement element 43.

[0106] The inventors of the present application found that when welding with an electron beam, the temperature measured by the temperature measurement element 43 is on the high side. The inventors further found that when welding with an electron beam, the electron beam will form a sputtering beam. Since the temperature measurement element 43 is relatively close to the weld seam, for example, the gap between them is only 2 - 5 mm, the sputtering beam will contact the temperature measurement element 43, and the sputtering beam has a high temperature, thus affecting the measurement result of the temperature measurement element 43 and making the measured temperature of the temperature measurement element 43 on the high side. By providing a protection member 41 outside each temperature measurement element 43 in the embodiments of the present application, the sputtering beam can be blocked, avoiding the contact between the sputtering beam and the temperature measurement element 43, which is beneficial to ensuring the accuracy of the measurement result of the welding temperature.

[0107] In some embodiments, during welding, the welding temperature at a preset position of the main body section 61 can be measured. There can be two preset positions. In some embodiments, the preset position can be the position at a preset distance from the end of the center of the main body section 61. In some embodiments, the preset position can be the position at 7 mm from the end of the center of the main body section 61.

[0108] In some embodiments, the welding temperature at the preset position of the main body section 61 during the welding process is measured in real time by the temperature measurement element 43.

[0109] In some embodiments, the temperature measurement element 43 can be a thermocouple, such as an ultra-high speed thermocouple. When the thermocouple is an ultra-high speed thermocouple, since it is very sensitive to temperature changes, setting the protection member 41 can better avoid the influence of the electron beam and the sputtering beam during the welding process on the measurement result of the welding temperature.

[0110] In some embodiments, the protection member 41 can be a ceramic pipe fitting. Ceramics have good heat insulation properties. Using the ceramic pipe fitting as the protection member 41 not only blocks the sputtering beam but also helps with heat insulation, avoiding the heat of the sputtering beam from being transferred to the temperature measurement element 43.

[0111] In some embodiments, the length by which the temperature measurement element 43 protrudes from the protective member 41 may be 0.01 - 0.1 mm, so as to be able to contact the main body section 61 for temperature measurement. In the embodiments of the present application, the part of the temperature measurement element 43 protruding from the protective member 41 is within the range of 0.01 - 0.1 mm, which can minimize the length of the temperature measurement element 43 protruding from the protective member 41 on the basis of ensuring that the temperature measurement element 43 can abut against the main body section 61, so as to avoid the sputtering beam current from contacting the temperature measurement element 43.

[0112] In some embodiments, the temperature measurement assembly 40 may include a holding member 42. The temperature measurement element 43 may be disposed on the holding member 42. The protective member 41 extends from the holding member 42 toward the moving platform 31.

[0113] In the embodiments of the present application, by providing the holding member 42 in the temperature measurement assembly 40 and disposing the temperature measurement element 43 and the protective member 41 on the holding member 42, the temperature measurement element 43 and the protective member 41 can be kept stable and not easily shaken.

[0114] In some embodiments, the electron beam welding device may further include a fixed platform 32. The fixed platform 32 may be disposed on the moving platform 31, and the welding fixture 50 may be connected to the fixed platform 32. In some embodiments, the welding fixture 50 may be connected to the fixed platform 32 by means of a hole and pin fit.

[0115] In some embodiments, such as Figure 14 and Figure 15 shown, the holding member 42 may include two oppositely disposed mounting portions 421 and a positioning portion 422 formed between the two mounting portions 421. The mounting portion 421 may be used to mount the protective member 41. The positioning portion 422 may be used to cooperate with a pressing member 51 that presses the middle of the main body section 61 against the bottom plate 52, so that the two mounting portions 421 can symmetrically measure the temperature at positions on both sides of the main body section 61 at a preset distance from the weld 64.

[0116] In the embodiments of the present application, by respectively mounting a plurality of protective members 41 on the two oppositely disposed mounting portions 421, the temperature at positions on both sides of the main body section 61 at a preset distance from the weld 64 can be respectively measured, so as to further ensure the accuracy of the weld temperature measurement result and thus ensure the welding quality.

[0117] In some embodiments, each mounting portion 421 may be provided with a plurality of protective members 41.

[0118] In some embodiments, the positioning portion 422 is a positioning groove. The pressing member 51 can enter the positioning groove. By setting the positioning portion 422 as a positioning groove into which the pressing member 51 can enter, the embodiments of the present application facilitate the centering of the two mounting portions 421 and the welding fixture 50, so as to ensure that the temperature measuring element 43 can be close to the weld seam and measure the temperature of the weld seam.

[0119] In some embodiments, the temperature measuring assembly 40 may further include a rotating member 44. The rotating member 44 can be arranged to drive the holding member 42 to rotate, so that the holding member 42 can be in a position directly above the welding fixture 50, so that the temperature measuring element 43 can contact the main body section 61 for temperature measurement, and can also make the holding member 42 rotate to a position where the welding fixture 50 can be disassembled and assembled with the moving platform 31.

[0120] By providing the rotating member 44 in the temperature measuring assembly 40, the embodiments of the present application can make the holding member 42 rotatably arranged directly above the welding fixture 50, so as to accurately measure the temperature using the temperature measuring element 43 when the temperature of the main body section 61 needs to be measured; when the temperature of the main body section 61 does not need to be measured, it is convenient to disassemble the welding fixture 50.

[0121] In some embodiments, as Figure 13 shown, the rotating member 44 may include a rotating body 441 and two rotating brackets 442. The rotating body 441 is rotatably arranged on the two rotating brackets 442. The holding member 42 is arranged on the rotating body 441 to drive the holding member 42 to rotate by the rotating body 441.

[0122] In some embodiments, the holding member 42 may include a holding body 420, and the two mounting portions 421 are connected to the holding body 420. The holding body 420 is connected to the rotating body 441.

[0123] In some embodiments, the rotating member 44 may further include a driving member and a rotating shaft 443. The rotating shaft 443 is used to connect the driving member and the rotating body 441 to drive the rotating body 441 to rotate by the driving member. The driving member can be installed on the chamber cover 12.

[0124] In some embodiments, the two rotating brackets 442 are installed on the moving body 311 of the moving platform 31 to move together with the moving body 311.

[0125] In some embodiments, the rotating member 44 may further include a sliding bearing 444 and a sliding connection portion 445. The sliding bearing 444 may be used to connect with the chamber cover 12. The sliding connection portion 445 may be used to connect with the rotating shaft 443. The sliding connection portion 445 is formed with a sliding groove 446. The sliding bearing 444 is slidably disposed in the sliding groove 446 of the sliding connection portion 445. The extending direction of the sliding groove 446 is the same as the moving direction of the moving body 311 relative to the supporting body 301. Thus, when the moving body 311 drives the two rotating brackets 442 and the rotating body 441 to move, the cooperation between the sliding bearing 444 and the rotating shaft 443 is maintained by the movement of the sliding bearing 444 along the sliding groove 446.

[0126] In some embodiments, the fixing device further includes: a tightening device for tightening the threaded fastener of the welding fixture.

[0127] In some embodiments, referring to Figure 16 , the frame 53 includes four sides, and the four sides include two first sides arranged oppositely and two second sides arranged oppositely. The first side and the second side are perpendicular to each other. Threaded holes are provided on all four sides and the top surface. The fixture body may further include a first threaded fastener 531, a second threaded fastener 532, and a third threaded fastener 533. The first threaded fastener 531 is used to be installed at the threaded hole on the first side of the frame 53, and the welding base material is tightened in the width direction through the first threaded fastener 531; the second threaded fastener 532 is used to be installed at the threaded hole on the second side of the frame 53, and the welding base material is tightened in the length direction through the second threaded fastener 532; the third threaded fastener 533 is used to be installed at the threaded hole on the top surface of the frame 53, and the third threaded fastener 533 is used to tighten the pressing member 51 against the frame 53, so as to tighten the welding base material against the bottom plate 52.

[0128] The number of the pressing members 51 may be three, including a first pressing member 51, a second pressing member 51, and a third pressing member 51. Wherein, notches are formed at both ends of the third pressing member 51, and a notch is formed at one end of the second pressing member 51.

[0129] On the outer side of the heat chamber, the two end splicing segments can be first placed in the welding fixture 50. Manually install the first threaded fastener 531 and the second threaded fastener 532 into the corresponding threaded holes on the two first sides and the two second sides, and tighten the first threaded fastener 531 on one first side and the second threaded fastener 532 on one second side (since the first threaded fastener 531 on the other first side and the second threaded fastener 532 in the other second side are not tightened, it does not affect the placement of the main body segment 61). Then, install the first pressing member 51 located above one end splicing segment on the top surface through two third threaded fasteners 533 (the two third threaded fasteners 533 are not tightened), and install one end of the second pressing member 51 located above the other end splicing segment on the top surface through one third threaded fastener 533 (the third threaded fastener 533 is not tightened). Install the remaining 3 third threaded fasteners 533 into the corresponding threaded holes on the top surface respectively.

[0130] After that, transfer the welding fixture 50 into the heat chamber. Manually operate the manipulator to place the main body segment 61 between the two end splicing segments in the frame 53. Then, engage the notches at both ends of the third pressing member 51 with the corresponding two third threaded fasteners 533 respectively, and engage the notch at the other end of the second pressing member 51 with the corresponding third threaded fastener 533. After that, use the tightening device of the embodiment of the present application to tighten the threaded fasteners that are not tightened on the top surface, the first side surface and the second side surface. The threaded fastener can be a bolt or a screw or a screw, etc.

[0131] See Figure 17 , the tightening device of the embodiment of the present invention includes: a fixture holding mechanism 1011, a top surface tightening mechanism 1020, a first side surface tightening mechanism 1030 and a second side surface tightening mechanism 1040.

[0132] The fixture holding mechanism 1011, the top surface tightening mechanism 1020, the first side surface tightening mechanism 1030 and the second side surface tightening mechanism 1040 can all be installed on the installation platform 101.

[0133] The fixture holding mechanism 1011 is used to hold the welding fixture 50 to be tightened, so that the welding fixture 50 remains stationary when tightening the threaded fastener. The top surface tightening mechanism 1020 is used to tighten the third threaded fastener 533 on the top surface of the welding fixture 50. The first side surface tightening mechanism 1030 is arranged facing the first side surface of the welding fixture 50 and is used to tighten the first threaded fastener 531 on the first side surface. The second side surface tightening mechanism 1040 is arranged facing the second side surface of the welding fixture 50 and is used to tighten the second threaded fastener 532 on the second side surface.

[0134] In the embodiment of the present application, by providing a fixture holding mechanism 1011, a top surface tightening mechanism 1020, a first side surface tightening mechanism 1030, and a second side surface tightening mechanism 1040, the threaded fasteners that need to be tightened on the top surface, the first side surface, and the second side surface of the welding fixture 50 can be tightened.

[0135] In some embodiments, the top surface tightening mechanism 1020, the first side surface tightening mechanism 1030, and the second side surface tightening mechanism 1040 can be automatic tightening mechanisms, so that the whole tightening process does not require manual intervention, improving the tightening efficiency.

[0136] Compared with manually operating a manipulator to tighten the threaded fasteners, in the embodiment of the present application, the threaded fasteners are tightened by a tightening mechanism, which can improve the assembly quality of the welding fixture 50 and is beneficial to ensuring the stability of the welded base material during the welding process.

[0137] The embodiment of the present application also provides a preparation method for a radioactive impact sample, which is used to reassemble the broken head of the radioactive impact sample and two end splicing segments into a new radioactive impact sample. The preparation method may include steps S1 to S6.

[0138] S1. Cut off the two side ends of the broken head to form a main body segment.

[0139] S2. Splice the main body segment and the two end splicing segments in a preset manner.

[0140] S3. Fix the relative positions between the two end splicing segments and the main body segment.

[0141] S4. Weld the main body segment and the two end splicing segments to form a blank of the radioactive impact sample.

[0142] S5. Measure the temperature of the main body segment during the welding process, and judge whether the blank of the radioactive impact sample is qualified according to the measured temperature.

[0143] S6. When the blank of the radioactive impact sample is qualified, process the welded blank to form a radioactive impact sample.

[0144] The preparation method of the embodiment of the present application can judge whether the welded blank 60 is qualified according to the measured temperature, process the qualified blank 60 to form a radioactive impact sample, which is beneficial to ensuring that the reconstructed radioactive impact sample can accurately reflect the performance of the original radioactive impact sample; at the same time, for unqualified blanks 60, subsequent operations are not required, saving time costs and avoiding subsequent ineffective operations.

[0145] In some embodiments, before step S1, the preparation method may further include step S0.

[0146] S0. Cut the cross-section on the side of the broken end of the impact sample away from the notch to facilitate welding; cut a section of the broken end of the impact sample with a preset length as the main body section 61. The main body section 61 obtained through step S0 in the embodiments of the present application can make the reconstructed measurement more accurate because this part will not be deformed in the previous impact test.

[0147] In some embodiments, when cutting the cross-section on the side of the broken end of the impact sample away from the notch, the cutting width can be relatively small, such as 0.5 mm. The preset length can be 20 mm.

[0148] In some embodiments, the preparation method of the embodiments of the present application can be implemented by using the preparation system of any embodiment of the present application.

[0149] In some embodiments, step S4 can use the electron beam welding device of any embodiment of the present application to weld the main body section 61 and the two end splicing sections. In some embodiments, when welding, the welding temperature at a preset position of the main body section 61 can be measured. There can be two preset positions. In some embodiments, the preset position can be the position at a preset distance from the end of the center of the main body section 61. In some embodiments, the preset position can be the position at 7 mm from the end of the center of the main body section 61.

[0150] In some embodiments, in step S5, the steps of judging whether the blank of the radioactive impact sample is qualified according to the measured temperature include: when the measured temperature is greater than or equal to the preset threshold, the blank is unqualified; when the measured temperature is less than the preset threshold, the blank is qualified.

[0151] In some embodiments, the temperature measuring element 43 is used to measure the welding temperature at the preset position of the main body section 61 in real time during the welding process.

[0152] In some embodiments, when the temperature measured by the temperature measuring element 43 reaches the preset temperature threshold, the blank 60 is unqualified and cannot be used; when the temperature measured by the temperature measuring element 43 is always lower than the preset temperature threshold, the blank 60 is qualified.

[0153] In the embodiments of the present application, the preset temperature threshold can be determined through experiments. It is easy to understand that the preset temperature threshold is related to the position where the temperature measuring element 43 measures and the preset temperature threshold. The closer the position where the temperature measuring element 43 measures is to the weld, the higher the corresponding preset temperature threshold. In some embodiments, the temperature at the position 7 mm from the end of the center of the main body section 61 cannot exceed 250°C.

[0154] In some embodiments, the steps of processing the welded blank in step S6 may include: when the main body section 61 of the blank 60 is clamped by the auxiliary clamping portion 813, the weld seam 64 between the main body section 61 and the end splicing section may be oriented towards the cutting member 82 by rotating the auxiliary rotating portion 812; then, the protruding portions of the two end splicing sections from the main body section 61 are cut using the electrode wire of a slow wire electrical discharge machining.

[0155] In some embodiments, the welding fixture may be Figure 16 the welding fixture 50 shown. In some embodiments, if the total length of the main body section 61 and the two end splicing sections is 55 mm, the length of the main body section 61 may be 20 mm, and the initial length of the end splicing section may be greater than 17.5 mm, so that the length of the processed end splicing section is 17.5 mm.

[0156] In some embodiments, the width of the weld seam 64 may be 2 mm.

[0157] To avoid the temperature of the main body section 61 exceeding the preset temperature threshold, during welding, it is necessary to make the melting zone (the melting zone is the area formed after the welded base metal near the weld seam 64 melts during the welding process) as narrow as possible and the width of the weld seam 64 as small as possible, so as to reduce the diffusion of heat to the middle of the main body section 61, so that the temperature at the preset position of the main body section 61 does not exceed the preset temperature threshold.

[0158] In some embodiments, the welding parameters of the electron beam welding device may be set as follows: welding speed 9 mm, welding electron beam current 45 mA, and focusing position 3 mm. The inventors of the present application conducted combined experiments among different welding speeds, different welding electron beam currents, and different focusing positions and found that using the above welding parameters for welding is beneficial for ensuring that the main body section 61 and the end splicing section are welded through, and is also beneficial for ensuring that the temperature of the main body section 61 does not exceed the preset temperature threshold.

[0159] In some embodiments, the main body section 61 is formed of radioactive ferrite; before step S2, the preparation method further includes: demagnetizing the main body section 61 and the two end splicing sections.

[0160] The inventors of the present application found that when welding using an electron beam, if the main body section 61 formed of radioactive ferrite is directly welded, the electron beam will deviate under the magnetic field of the ferrite, thereby affecting the focusing position and welding position of the electron beam, resulting in uneven width of the weld seam. If the width of the weld seam 64 is uneven, it will cause the distance from the edge of the weld seam at some positions to the middle of the main body section 61 to be too close, thus increasing the temperature in the middle of the main body section 61 and ultimately resulting in the disqualification of the blank of the prepared radioactive impact sample.

[0161] Embodiments of the present application perform degaussing treatment on the main body section 61 and the two end splicing sections before welding, which is beneficial to ensuring that the focusing position of the electron beam and the welding position are more accurate, thereby helping to avoid the temperature rise in the middle of the main body section 61 during the welding process.

[0162] In some embodiments, before performing degaussing treatment on the main body section 61 and the two end splicing sections, the main body section 61 and the two end splicing sections can be first subjected to surface cleaning and pretreatment to remove impurities such as oil stains and oxides on the welding surfaces of the main body section 61 and the two end splicing sections, so as to improve the welding quality.

[0163] Specifically, the welding surfaces of the main body section 61 and the two end splicing sections can be polished step by step with sandpapers of 400 mesh, 600 mesh, and 800 mesh in sequence to remove oxides. After polishing, the welding surfaces of the main body section 61 and the two end splicing sections are ultrasonically cleaned with acetone to remove impurities such as oil stains and polishing fluids.

[0164] In some embodiments, a degausser can be used to perform degaussing treatment on the main body section 61 and the two end splicing sections. After the degaussing treatment is completed, the welding surfaces of the main body section 61 and the two end splicing sections can be wiped again with acetone to remove impurities such as oil stains.

[0165] The following combines the drawings and specific embodiments to detail the process of welding using the method of the embodiments of the present application.

[0166] According to the performance and material of the main body section 61 of the welding base material, a splicing main body section 62 and a splicing auxiliary section 63 with material properties close to those of the main body section 61 are selected, so as to facilitate the performance of the formed radioactive impact sample to be the same as that of the radioactive impact sample before reconstruction.

[0167] The welding surfaces of the main body section 61 and the splicing main body section 62 are polished step by step with sandpapers of 400 mesh, 600 mesh, and 800 mesh in sequence to remove oxides. After polishing, the welding surfaces of the main body section 61 and the splicing main body section 62 are ultrasonically cleaned with acetone to remove impurities such as oil stains and polishing fluids.

[0168] A degausser is used to perform degaussing treatment on the main body section 61, the splicing main body section 62, and the splicing auxiliary section 63. After the degaussing treatment is completed, the welding surfaces of the main body section 61 and the splicing main body section 62 can be wiped again with acetone to remove impurities such as oil stains.

[0169] Assemble the welding fixture 50 of the embodiment of the present application, as well as the main body section 61, the splicing body section 62, and the splicing auxiliary section 63 that have been polished, ultrasonically cleaned, degaussed, etc., and place them on the moving platform 31; then rotate the temperature measurement assembly 40 so that the temperature measurement elements 43 on both sides are respectively abutted against two preset positions of the main body section 61 to measure the welding temperature at the preset positions of the main body section 61 in real time; close the chamber cover 12 of the electron beam welding device.

[0170] Start the vacuum system to evacuate the vacuum chamber 10 formed by the chamber main body 11 and the chamber cover 12. Control the translation of the moving platform 31 so that the position where the main body section 61 and the splicing body section 62 are joined can move to a position aligned with the electron beam; input the welding parameters and start the electron beam welding device to weld the position where the main body section 61 and the splicing body section 62 are joined by using the electron beam current. The welding parameters can be: welding speed 9 mm, welding electron beam current 45 mA, and focusing position 3 mm.

[0171] When it is necessary to weld the main body section 61 and another end splicing section after the current weld is completed, use the moving platform 31 to move the position where the main body section 61 and the other end splicing section are joined to a position aligned with the electron beam to weld the welding position by using the electron beam current. After welding, the four splicing auxiliary sections 63, the two splicing body sections 62, and the main body section 61 can form an integral structure, which is the blank 60 of the radioactive shock sample.

[0172] Transport the blank 60 to the hot cell, place the blank 60 on the blank holder 71 on the operating table by the hot cell manipulator, and clamp the blank 60 by the blank holder 71. Grasp the blank 60 from the blank holder 71 by the transfer gripper 92 of the blank transfer member 90. Place the blank 60 on the cutting auxiliary gripper 81 of the slow wire electrical discharge machining machine 80 by the transfer gripper 92 of the blank transfer member 90 and clamp the blank 60.

[0173] After that, self-align the coordinate offset of the coaxial error in the radial and axial directions of the slow wire electrical discharge machining machine 80. According to the data obtained after the molybdenum wire is discharged close twice, the straightness when the cutting auxiliary gripper 81 is at 90 degrees can be obtained, and at the same time, the coordinate offset correction is performed. After the rotational alignment, the machining coordinate and the actual coordinate are basically coincident, avoiding the machining error caused by the fixture error.

[0174] According to the coordinates that have been calibrated previously, the molybdenum wire directly cuts the two second splicing surfaces 6221 of the second end splicing section 622 against the main body section 61 at the 0-degree position of the cutting auxiliary clamping member 81 in sequence. After that, the two auxiliary clamping portions 813 are rotated 90 degrees, and the first splicing surface 6211 of the second end splicing section 622 of the blank 60 is cut in sequence. Then, the first end splicing section 621 of the blank 60 is cut by a similar cutting method. Finally, a V-shaped notch is cut on the second surface 612 of the main body section 61 to finally obtain a standard Charpy impact specimen of 10 mm × 10 mm × 55 mm.

[0175] For the embodiments of the present application, it should also be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other to obtain new embodiments.

[0176] As described above, the above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. The protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A preparation system for radioactive impact samples, which is used to reassemble the main body segment formed by machining the broken head of a radioactive impact sample and two end splicing segments into a new radioactive impact sample, and is characterized in that, The preparation system includes: A fixing device for respectively arranging the two end splicing segments at both ends of the main body segment and fixing the relative positions between the two end splicing segments and the main body segment; A welding device for welding the main body segment and the two end splicing segments fixed by the fixing device to form a blank of the radioactive shock sample; A processing device for processing the blank to form the radioactive shock sample; Wherein, the welding device includes a temperature measurement component for measuring the temperature of the main body segment during welding; The processing device includes: a cutting device, the cutting device includes a cutting auxiliary clamping member and a cutting member, the cutting auxiliary clamping member is arranged to be able to clamp the main body segment of the blank, and the cutting member is arranged to be able to cut the blank clamped by the cutting auxiliary clamping member to form a radioactive shock sample; The cutting auxiliary clamping member includes: An auxiliary body, an auxiliary rotating part arranged on the auxiliary body, and two auxiliary clamping parts oppositely arranged on the auxiliary body, and the two auxiliary clamping parts are arranged to be able to clamp the main body segment of the blank; The auxiliary clamping part includes an extension segment and a first clamping segment, the first clamping segment is connected to the extension segment, and the first clamping segment is used for clamping the main body segment of the blank; When the two first clamping segments clamp the main body segment of the blank, the two extension segments and the auxiliary body and the first clamping segment jointly form a receiving groove; There is a gap between the first end splicing segment and the auxiliary body, the first clamping segment and the extension segment, so that the cutting member can enter the gap to cut the first end splicing segment; The auxiliary clamping part further includes a second clamping segment, the second clamping segment is connected to the first clamping segment, and the second clamping segments of the two auxiliary clamping parts respectively extend in opposite directions from their respective first clamping segments so that the two second clamping segments are staggered from each other; the second clamping segment forms a through groove.

2. The preparation system according to claim 1, characterized in that, The fixing device includes: A welding fixture, including a fixture main body and a plurality of threaded fasteners, the fixture main body is used to provide a space for splicing the main body segment and the two end splicing segments, and the threaded fasteners are used to tightly press the main body segment and the two end splicing segments against the fixture main body.

3. The preparation system according to claim 2, wherein, The fixing device further includes: A tightening device for tightening the threaded fasteners of the welding fixture.

4. The preparation system according to claim 1, characterized in that, The processing device further includes: A blank holding member arranged to be able to hold one end splicing segment of the blank; A blank transfer member arranged to be able to clamp the other end splicing segment of the blank to transfer the blank from the blank holding member to the cutting auxiliary clamping member.

5. The preparation system according to claim 2, wherein The welding device includes: A main body part arranged to form a vacuum chamber; An electron gun for providing an electron beam to the vacuum chamber; A moving platform for installing the welding fixture and arranged to be able to drive the welding fixture to translate in the vacuum chamber to weld the two end splicing segments and the main body segment by using the electron beam; The temperature measurement component is used to measure the temperature of the main body segment in the welding fixture during welding.

6. The preparation system according to claim 5, wherein, The temperature measurement component includes: A plurality of temperature measurement elements for abutting against the main body segment to measure the temperature of the main body segment; A plurality of protective members, each of the temperature measuring elements extends within one of the protective members to protrude from the protective member, and each of the protective members is used to prevent the sputtering beam formed during the electron beam welding from contacting a corresponding one of the temperature measuring elements.

7. A method for preparing a radioactive impact sample, which is used to reassemble the broken end of a radioactive impact sample and two end splicing segments into a new radioactive impact sample, characterized in that, The preparation method includes: Cutting off both ends of the broken head to form a main body section; Splicing the main body section and the two end splicing sections in a preset manner; Fixing the relative positions between the two end splicing sections and the main body section; Welding the main body section and the two end splicing sections to form a blank of the radioactive shock sample, wherein during the welding process, the temperature of the main body section is measured, and it is judged whether the blank of the radioactive shock sample is qualified according to the measured temperature; When the blank of the radioactive shock sample is qualified, processing the welded blank to form the radioactive shock sample; The preparation method is realized by using the preparation system according to any one of claims 1-6.

8. The preparation method according to claim 7, characterized in that, The step of judging whether the blank of the radioactive shock sample is qualified according to the measured temperature includes: When the measured temperature is greater than or equal to a preset threshold, the blank is unqualified; When the measured temperature is less than the preset threshold, the blank is qualified.

9. The preparation method according to claim 7, wherein Before splicing the main body section and the two end splicing sections in a preset manner, the preparation method further includes: Demagnetizing the main body section and the two end splicing sections.

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