Preparation system and preparation method of radioactive impact sample

Abstract

The embodiment of the invention relates to the technical field of impact sample preparation, in particular to a preparation system and a preparation method of a radioactive impact sample, which are used for reassembling a main body section formed by processing a broken end of the radioactive impact sample and two end splicing sections into a new radioactive impact sample. The preparation system comprises a fixing device used for arranging the two end splicing sections at the two ends of the main body section correspondingly and fixing the relative positions between the two end splicing sections and the main body section; the welding device is used for welding the main body section and the two end splicing sections which are fixed by the fixing device to form a blank of the radioactive impact sample; and the processing device is used for processing the green body to form the radioactive impact sample. The welding device comprises a temperature measuring assembly which is used for measuring the temperature of the main body section during welding. According to the embodiment of the invention, the reconstructed radioactive impact sample can accurately reflect the performance of the original radioactive impact sample.

Description

Technical Field

[0001] The present application relates to the technical field of impact sample preparation, and in particular to a preparation system and method for a radioactive impact sample. Background Art

[0002] This section of content merely provides background information related to the present application and does not necessarily constitute prior art.

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

[0004] The impact sample reconstruction technology is to reassemble the broken ends of the tested impact samples to form a sample blank, and then process the sample blank into an impact sample for retesting. This technology can significantly improve the efficiency of impact sample use 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 the present application is provided below in order to provide a basic understanding of certain aspects of the present application. It should be understood that this overview is not an exhaustive overview of the present application. It is not intended to identify the key or important parts of the present application, nor is it intended to limit the scope of the present application. Its purpose is merely to present certain concepts in a simplified form as a prelude to a more detailed description discussed later.

[0006] In order to solve the above-mentioned technical problems, the embodiments of the present application provide a system and method for preparing a radioactive impact sample.

[0007] In the first aspect, an embodiment of the present application provides a preparation system for a radioactive impact sample, which is used to reassemble a main section formed by the decapping of a radioactive impact sample and two end splicing sections into a new radioactive impact sample, and the preparation system includes: a fixing device, which is used to arrange the two end splicing sections at the two ends of the main section respectively, and fix the relative position between the two end splicing sections and the main section; a welding device, which is used to weld the main section fixed by the fixing device and the two end splicing sections 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 section during welding.

[0008] In the second aspect, an embodiment of the present application also provides 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 sections into a new radioactive impact sample, the preparation method comprising: cutting off the two side ends of the broken head to form a main section; splicing the main section and the two end splicing sections in a preset manner; fixing the relative position between the two end splicing sections and the main section; welding the main section and the two end splicing sections to form a blank of the radioactive impact sample, wherein the temperature of the main section is measured during the welding process, and whether the blank of the radioactive impact sample is qualified is judged based on 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] The embodiment of the present application can reassemble the broken ends of the radioactive shock sample into a new radioactive shock sample. The embodiment of the present application is conducive to making the reconstructed radioactive shock sample accurately reflect the performance of the original radioactive shock sample by setting a temperature measurement component.

[0010] These and other advantages of the present application will become more apparent through the following detailed description of the preferred embodiments of the present application in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to further illustrate the above and other advantages and features of the present application, the specific embodiments of the present application are further described in detail below in conjunction with the accompanying drawings. The accompanying drawings together with the following detailed description are included in this specification and form a part of this specification. Elements with the same function and structure are represented by the same reference numerals. It should be understood that these drawings only describe 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 radioactive impact sample processing device according to an embodiment of the present application;

[0013] Figure 2 yes Figure 1 The schematic diagram of the structure of the blank holder shown;

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

[0015] Figure 4 yes Figure 3 An enlarged schematic diagram of a cutting auxiliary clamp in the cutting device shown;

[0016] Figure 5 yes Figure 4 The schematic diagram of the structure of the cutting auxiliary clamping member when the blank is not clamped;

[0017] Figure 6 yes Figure 5 A schematic structural diagram of an auxiliary clamping portion of a cutting auxiliary clamping member shown;

[0018] Figure 7 yes Figure 4 A top view of the cutting aid clamp shown;

[0019] Figure 8 yes Figure 4 A side view of the cutting aid clamp is shown;

[0020] Fig. 9 yes Figure 1 A partial enlarged view of a blank transfer part in a processing system for radioactive impact samples is shown;

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

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

[0023] Fig.12 yes Fig.11 A schematic structural diagram of the electron beam welding device shown in another angle;

[0024] Fig.13 yes Fig.12 A partial enlarged schematic diagram of an electron beam welding device shown;

[0025] Fig.14 yes Fig.13 A further partial enlarged schematic diagram of the electron beam welding device shown in the figure omits the clamping connection portion in the middle of the welding fixture;

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

[0027] Fig.16 is a structural schematic diagram of a welding fixture according to an embodiment of the present application for fixing a main body section and an end splicing section;

[0028] Fig.17 Schematic diagram of the structure 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 merely shown in a schematic manner that does not affect the reader's understanding.

[0030] Description 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 body; 12. chamber cover; 121. sealing part; 13. window;

[0033] 20. electron gun; 21. first mounting plate; 211. sliding mounting portion; 22. second mounting plate; 221. sliding mounting matching portion; 23. driving portion;

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

[0035] 40. Temperature measuring assembly; 41. Protective member; 42. Holding member; 420. Holding body; 421. Mounting portion; 422. Positioning portion; 43. Temperature measuring element; 44. Rotating member; 441. Rotating body; 442. Rotating bracket; 443. Rotating shaft; 444. Sliding bearing; 445. Sliding connection portion; 446. Slide groove;

[0036] 50. welding fixture; 51. pressing member; 52. base 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. spliced ​​main body section; 621. first end spliced ​​section; 6211. first spliced ​​surface; 622. second end spliced ​​section; 6221. second spliced ​​surface; 63. spliced ​​auxiliary section; 64. weld;

[0038] 71, blank holding member; 711, blank holding body; 712, moving member;

[0039] 80, cutting device; 81, cutting auxiliary clamping member; 811, auxiliary body; 812, auxiliary rotating part; 8130, receiving groove;

[0040] 813, auxiliary clamping portion; 8131, extension section; 8132, first clamping section; 81321, clearance groove; 8133, second clamping section; 81331, through groove;

[0041] 82. Cutting pieces;

[0042] 90. Blank transfer part; 910. Mounting base; 91. Robotic arm; 911. First rotating part; 912. First connecting arm; 913. Second rotating part; 914. Second connecting arm; 915. Third rotating part; 916. Telescopic arm; 917. Fourth rotating part; 918. Transfer clamping rotating part; 92. Transfer clamping part; 921. Clamping claw. DETAILED DESCRIPTION

[0043] Exemplary embodiments of the present application will be described below in conjunction with the accompanying drawings. For the sake of clarity and conciseness, not all features of the actual implementation are described in the specification. However, it should be understood that many implementation-specific decisions must be made in the process of developing any such actual implementation in order to achieve the developer's specific goals, such as meeting those constraints related to the system and business, and these constraints may vary from implementation to implementation. In addition, it should be understood that although the development work may be very complex and time-consuming, it is only a routine task for those skilled in the art who benefit from the content of this application.

[0044] It is also necessary to explain here that, in order to avoid obscuring the present application due to unnecessary details, only the device structure and / or processing steps closely related to the scheme according to the present application are shown in the accompanying drawings, while other details that are not very relevant to the present application are omitted.

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

[0046] In the description of the embodiments of the present application, “plurality” means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0047] An embodiment of the present application provides a preparation system for a radioactive impact sample, which is used to reassemble the main section formed by the decapitation processing of the radioactive impact sample and the two end splicing sections 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 arrange the two end splicing sections at the two ends of the main section respectively, and fix the relative positions between the two end splicing sections and the main section. The welding device is used to weld the main section fixed by the fixing device and the two end splicing sections 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 embodiment of the present application can reassemble the decapitation of a 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-shaped 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 during welding. Therefore, the embodiment of the present application measures the temperature of the main section during welding by setting a temperature measurement component in the welding device, which is conducive to ensuring the quality of the blank of the welded radioactive impact sample, avoiding changes in the performance of the main section, and allowing the reconstructed radioactive impact sample to accurately reflect the performance of the original radioactive impact sample.

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

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

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

[0054] The blank holder 71 can be configured to hold any end splicing section 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 completely the same.

[0055] Specifically, the blank holder 71 may 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 may be configured to clamp the main body section 61 of the blank 60. The blank transport member 90 may 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, and can initially position the blank 60 so that the blank transporter 90 can clamp the blank 60. Through the mutual cooperation between the blank holder 71, the cutting device 80 and the blank transporter 90, the blank 60 of the radioactive impact sample formed by welding can be sent to the cutting device 80 to be cut into a radioactive impact sample.

[0057] In some embodiments, the cutting device 80 may be a wire-cut electric discharge machine, and the cutting member 82 may be an electrode wire. In some embodiments, the cutting device 80 may be a wire-cut electric discharge machine.

[0058] In some embodiments, the electrode wire may be a molybdenum wire having 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 holder body 711 and a plurality of movable members 712 disposed on the blank holder body 711. The plurality of movable members 712 are movably disposed on the blank holder body 711 to jointly hold the blank 60 by abutting against the first end splicing section 621 of the blank 60.

[0061] The embodiment of the present application holds the blank 60 by placing a plurality of movable members 712 disposed on the blank holding body 711 in contact with the first end splicing section 621 of the blank 60, so that the clamped blank 60 is not prone to shaking, and at the same time facilitates 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 holding member 71 may include four moving members 712. The four moving members 712 may be disposed on the blank holding body 711 in pairs and opposite to each other, and are used to abut against four side surfaces of the first end splicing section 621 respectively.

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

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

[0065] The embodiment of the present application uses a robotic arm 91 with multiple degrees of freedom and a transfer clamp 92 arranged at the end of the robotic arm 91, so that 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 clamp 92, and the cutting auxiliary clamp 81. It has high flexibility and can also stably and safely transfer the blank 60 to ensure that the blank 60 can be processed smoothly.

[0066] In some embodiments, see Figure 1 and Fig. 9 The blank transporting member 90 may further include a mounting base 910 for mounting a mechanical arm 91. The mechanical 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 transporting clamping rotating member 918. The first rotating member 911 is rotatably connected to the mounting base 910, the first connecting arm 912 is connected to the first rotating member 911, and the first rotating member 911 drives the first connecting arm 912 to rotate around a vertical axis compared to the mounting base.

[0067] The second connecting arm 914 is connected to the first connecting arm 912 through the second rotating member 913, and 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, and 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, and the fourth rotating member 917 drives the transfer clamping rotating member 918 to rotate around the third horizontal axis, and the third horizontal axis and the second horizontal axis are parallel to the first horizontal axis. The transfer clamping member 92 is connected to the transfer clamping rotating member 918, and 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 blank transfer member 90 can realize the transfer of the blank 60 from the blank holding member 71 to the cutting auxiliary clamp 81, and it can precisely control the angle and spacing between the transfer clamp 92 and the cutting auxiliary clamp 81, so that the cutting member 82 can accurately process the blank 60 clamped by the cutting auxiliary clamp 81.

[0068] In some embodiments, the transport clamp 92 may include two oppositely disposed jaws 921 for clamping the second end splicing section 622 of the blank 60.

[0069] In some embodiments, the blank transporter 90 is further configured to transfer the cut radioactive impact sample to the blank holder 71 .

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

[0071] The embodiment of the present application utilizes the auxiliary rotating part 812 to drive 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, so as to facilitate cutting of different surfaces of the blank 60.

[0072] In some embodiments, Figures 4 to 8As shown, the auxiliary clamping portion 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 section 61 of the blank 60. When the two first clamping sections 8132 clamp the main section 61 of the blank 60, the two extension sections 8131, the auxiliary body 811 and the first clamping section 8132 together 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 piece 82 can enter the gap to cut the first end splicing section 621.

[0073] In the embodiment of the present application, the extension section 8131 and the first clamping section 8132 are arranged so 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. In this way, when the main section 61 of the blank 60 is clamped, the cutting piece 82 can not only cut the second end splicing section 622, but also cut the first end splicing section 621. There is no need to change the direction of the auxiliary clamping part 813 to clamp the blank 60, and the cutting efficiency is relatively high.

[0074] In some embodiments, two auxiliary clamping parts 813 may be disposed oppositely on the auxiliary body 811, and the two auxiliary clamping parts have the same structure. 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 of the main 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.

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

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

[0078] In some embodiments, the main body section 61 may include two first surfaces 611 and two second surfaces 612 disposed opposite to each other. One of the second surfaces 612 is used to form a V-shaped notch. The auxiliary clamping portion 813 may also 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 section 61 of the blank 60, the two opposite first surfaces 611 of the main body section 61 face the two first clamping segments 8132 respectively, and the two opposite second surfaces 612 face the two second clamping segments 8133 respectively.

[0079] The embodiment of the present application sets a second clamping section 8133 so that the two opposite first surfaces 611 and the two opposite second surfaces 612 of the main section 61 are clamped by the two auxiliary clamping parts 813, the first clamping section 8132 and the second clamping section 8133, respectively. In this way, the blank 60 will not slip or fall during the rotation, thereby reducing the rotation error and ensuring the stability of the processing process.

[0080] In some embodiments, the second surface 612 used to form the V-notch is the same surface as the surface with the V-notch in the broken end of the radioactive shock sample before reconstruction, which helps to ensure that the performance of the reconstructed radioactive shock sample is the same as that of the radioactive shock sample before reconstruction.

[0081] In some embodiments, the first end splicing section 621 and the second end splicing section 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 section 61, respectively.

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

[0083] The embodiment of the present application utilizes the through groove 81331 on the second clamping section 8133, so that the cutting piece 82 can enter the second gap and cut a V-shaped notch on the main section 61. In this way, during the processing, when the main section 61 of the blank 60 is clamped, the cutting piece 82 can cut a V-shaped notch on the main section 61 of the blank 60, and the cutting efficiency is relatively high and the operation is simple.

[0084] In some embodiments, the two first clamping segments 8132 respectively form a clearance groove 81321; when the two first clamping segments 8132 and the two second clamping segments 8133 clamp the main segment 61 of the blank 60, the clearance grooves 81321 of the two first clamping segments 8132 overlap, so that the cutting piece 82 can enter the clearance grooves 81321 of the two first clamping segments 8132 after entering the second gap, thereby cutting a V-shaped notch on the main segment 61.

[0085] In the embodiment of the present application, a clearance groove 81321 is formed on the first clamping section 8132 to facilitate cutting of a V-shaped notch on the main body section 61 .

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

[0087] For the sake of distinction, one of the auxiliary clamping parts 813 is called the first auxiliary clamping part 813, and the other auxiliary clamping part 813 is called the second auxiliary clamping part 813. In some embodiments, a side of the first clamping section 8132 of the first auxiliary clamping part 813 away from the second clamping section 8133 may form a clearance groove 81321. A side of the first clamping section 8132 of the second auxiliary clamping part 813 close to the second clamping section 8133 may form a clearance groove 81321.

[0088] When the first clamping section 8132 of the first auxiliary clamping part 813, the first clamping section 8132 of the second auxiliary clamping part 813, the second clamping section 8133 of the first auxiliary clamping part 813 and the second clamping section 8133 of the second auxiliary clamping part 813 clamp the main section 61 of the blank 60, the clearance grooves 81321 of the two first clamping sections 8132 can overlap.

[0089] In some embodiments, Fig.10As shown, when the two auxiliary clamping parts 813 clamp the blank 60, the cutting piece 82 can be used to cut the two second splicing surfaces 6221 of the second end splicing section 622 of the blank 60 in turn, and then the two auxiliary clamping parts 813 are rotated 90 degrees to cut the first splicing surface 6211 of the second end splicing section 622 of the blank 60 in turn, and then the first end splicing section 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 section 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 then the cutting member 82 can be used to cut the end of the broken head in the length direction.

[0091] The auxiliary body 811 may include an auxiliary rotating part 812 disposed on the auxiliary body 811, and two auxiliary clamping parts 813 disposed on the auxiliary body 811. The two auxiliary clamping parts 813 may be configured to clamp the main body section 61 of the blank 60. The auxiliary rotating part 812 may be used to drive the two auxiliary clamping parts 813 to rotate.

[0092] In some embodiments, the fixing device comprises: a welding fixture. Fig.16 The welding fixture 50 includes a fixture body and a plurality of threaded fasteners. The fixture body is used to provide a space for splicing the main body section 61 and the two end splicing sections. The threaded fasteners are used to press the main body section 61 and the two end splicing sections against the fixture body.

[0093] In some embodiments, Fig.16 As shown, the clamp body may include a plurality of clamping members 51, a frame 53 and a bottom plate 52. The frame 53 is connected to the bottom plate 52 to form a base material receiving groove for arranging the welding base material. The clamping member 51 is used to clamp the welding base material and the bottom plate 52 at the top of the frame 53 to avoid affecting the welding quality due to shaking of the welding base material during the welding process. The frame 53 may be an integral structure. In some embodiments, the extension direction of the clamping member 51 may be the same as the extension direction of the weld (i.e., the same as the width direction of the main body section 61).

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

[0095] In some embodiments, Fig.12 and Fig.13As shown, the electron beam welding device may include a body, an electron gun 20, a moving platform 31, and a temperature measurement assembly 40. The body is configured to form a vacuum chamber 10. The electron gun 20 may be used to provide an electron beam to the vacuum chamber 10. The moving platform 31 may be used to install a welding fixture 50, and is configured to be able to drive the welding fixture 50 to translate in the vacuum chamber 10, so as to weld the welding parent material using an electron beam. The temperature measurement assembly 40 may be used to measure the temperature of the main body section 61 in the welding fixture 50 during welding.

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

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

[0098] When the chamber cover 12 seals the opening of the chamber body 11, the mobile platform 31 and the temperature measurement assembly 40 enter the chamber body 11 so as to weld the main body section 61 and the end joint section using the electron beam provided by the electron gun 20. When the chamber cover 12 opens the opening of the chamber body 11, the mobile platform 31 and the temperature measurement assembly 40 are removed from the chamber body 11 so that the welding fixture 50 can be installed on or removed from the mobile 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 open side of the chamber cover 12 facing the chamber body 11. In the process of sealing the chamber cover 12 and the chamber body 11, the support platform 30 on the chamber cover 12 can move with the chamber cover 12, thereby entering the vacuum chamber 10. The mobile platform 31 may be arranged on the support platform 30 and slidably connected to the support platform 30. When welding, the mobile platform 31 can move relative to the support platform 30 so that the electron beam can be aligned with the gap between the main section 61 and each end splicing section, and can move along the extension direction of the gap, so as to complete the welding using the electron beam. After the welding is completed, a weld can be formed at the position corresponding to the gap. When the welding of the current weld is completed and another weld needs to be welded, the mobile platform 31 can move relative to the support platform 30 along a first direction perpendicular to the extension direction of the weld.

[0100] In some embodiments, the mobile platform 31 may include a mobile body 311 and a sliding portion 312. The support platform 30 may include a support body 301 and a sliding fitting portion 302. The extension direction of the sliding fitting portion 302 and the sliding portion 312 may be parallel to the extension direction of the weld of the embodiment of the present application. By connecting the sliding fitting portion 302 with the sliding portion 312, the mobile body 311 may be slidably disposed on the support body 301. Exemplarily, the sliding fitting portion 302 may be a slide rail, and the sliding portion 312 may be a slide groove.

[0101] In some embodiments, the electron gun 20 is configured 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 joint section. It is easy to understand that the moving direction of the electron gun 20 relative to the chamber body 11 can be perpendicular to the moving direction of the moving platform 31 relative to the supporting platform 30.

[0102] In some embodiments, Fig.12 As shown, the electron beam welding device may include a first mounting plate 21, a second mounting plate 22 and a driving unit 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 unit 23 is used to drive the first mounting plate 21 to slide relative to the second mounting plate 22.

[0103] The first mounting plate 21 is formed with a sliding mounting portion 211. The second mounting plate 22 may be formed with a sliding mounting matching portion 221 for matching 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 matching between the sliding mounting portion 211 and the sliding mounting matching portion 221.

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

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

[0106] The inventor of the present application found that when electron beam welding is performed, the temperature measured by the temperature measuring element 43 is too high. The inventor further found that when electron beam welding is performed, the electron beam will form a sputtering beam. Since the temperature measuring element 43 is close to the weld, for example, the gap between the two is only 2-5 mm, the sputtering beam will contact the temperature measuring element 43, and the sputtering beam temperature is high, thereby affecting the measurement result of the temperature measuring element 43, making the temperature measured by the temperature measuring element 43 too high. The embodiment of the present application can block the sputtering beam by providing a protective member 41 outside each temperature measuring element 43, thereby preventing the sputtering beam from contacting the temperature measuring element 43, thereby facilitating the accuracy of the measurement result of the welding temperature.

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

[0108] In some embodiments, the temperature measuring element 43 is used to measure in real time the welding temperature at a preset position of the main body segment 61 during the welding process.

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

[0110] In some embodiments, the protective member 41 may be a ceramic tube. Ceramics have good heat insulation effect. Using the ceramic tube as the protective member 41 not only blocks the sputtering beam, but also helps to insulate the heat and prevent the heat of the sputtering beam from being transferred to the temperature measuring element 43.

[0111] In some embodiments, the length of the temperature measuring element 43 protruding from the protective member 41 may be 0.01-0.1 mm, so as to be able to contact the main section 61 for temperature measurement. In the embodiment of the present application, the portion of the temperature measuring element 43 protruding from the protective member 41 is within the range of 0.01-0.1 mm, which can reduce the length of the temperature measuring element 43 protruding from the protective member 41 as much as possible while ensuring that the temperature measuring element 43 can abut against the main section 61, so as to avoid the sputtering beam from contacting the temperature measuring element 43.

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

[0113] In the embodiment of the present application, a retaining member 42 is provided in the temperature measuring assembly 40 , and the temperature measuring element 43 and the protective member 41 are provided on the retaining member 42 , so that the temperature measuring 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 movable 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 pin fit.

[0115] In some embodiments, Fig.14 and Fig.15 As shown, the retaining member 42 may include two mounting portions 421 disposed opposite to each other 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 portion of the main body section 61 against the bottom plate 52, so that the two mounting portions 421 can symmetrically measure the temperature of the positions at a preset distance from the weld 64 on both sides of the main body section 61.

[0116] The embodiment of the present application can measure the temperature of the positions at a preset distance from the weld 64 on both sides of the main section 61 by installing multiple protective parts 41 on two relatively arranged installation parts 421, so as to further ensure the accuracy of the weld temperature measurement results and thus ensure the welding quality.

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

[0118] In some embodiments, the positioning portion 422 is a positioning groove. The pressing member 51 can enter the positioning groove. In the embodiment of the present application, by setting the positioning portion 422 as a positioning groove that the pressing member 51 can enter, it is beneficial to align the two mounting portions 421 with the welding fixture 50 to ensure that the temperature measuring element 43 can approach the weld and measure the weld temperature.

[0119] In some embodiments, the temperature measurement assembly 40 may further include a rotating member 44. The rotating member 44 may be configured to drive the holder 42 to rotate, so that the holder 42 can be located directly above the welding fixture 50, so that the temperature measurement element 43 can contact the main body section 61 for temperature measurement, and the holder 42 can be rotated to a position where the welding fixture 50 can be assembled and disassembled from the mobile platform 31.

[0120] The embodiment of the present application sets a rotating part 44 in the temperature measuring assembly 40, so that the retaining part 42 can be rotatably set at a position directly above the welding fixture 50, so that when the temperature of the main section 61 needs to be measured, the temperature measuring element 43 can be used to accurately measure the temperature; when the temperature of the main section 61 does not need to be measured, the welding fixture 50 can be easily disassembled.

[0121] In some embodiments, Fig.13 As shown, the rotating member 44 may include a rotating body 441 and two rotating brackets 442. The rotating body 441 is rotatably disposed on the two rotating brackets 442. The retaining member 42 is disposed on the rotating body 441, so that the rotating body 441 drives the retaining member 42 to rotate.

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

[0123] In some embodiments, the rotating member 44 may further include a driving member and a rotating shaft 443, wherein the rotating shaft 443 is used to connect the driving member and the rotating body 441, so that the driving member drives the rotating body 441 to rotate. The driving member may be mounted 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 to the chamber cover 12. The sliding connection portion 445 may be used to connect to the rotating shaft 443. The sliding connection portion 445 is formed with a slide groove 446. The sliding bearing 444 is slidably disposed in the slide groove 446 of the sliding connection portion 445. The extension direction of the slide groove 446 is the same as the movement direction of the movable body 311 relative to the supporting body 301, so that when the movable body 311 drives the two rotating brackets 442 and the rotating body 441 to move, the sliding bearing 444 is moved along the slide groove 446 to maintain the cooperation with the rotating shaft 443.

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

[0127] In some embodiments, see Fig.16 The frame 53 includes four side surfaces, and the four side surfaces include two first side surfaces that are oppositely arranged and two second side surfaces that are oppositely arranged. The first side surface and the second side surface are perpendicular to each other. The four side surfaces and the top surface are all provided with threaded holes. The clamp body may also 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 surface of the frame 53, and the welding parent material is pressed in the width direction by the first threaded fastener 531; the second threaded fastener 532 is used to be installed at the threaded hole on the second side surface of the frame 53, and the welding parent material is pressed in the length direction by 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 press the clamp 51 against the frame 53, thereby pressing the welding parent material against the base 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. The third pressing member 51 has notches formed at both ends, and the second pressing member 51 has a notch formed at one end.

[0129] The two end splicing sections can be placed in the welding fixture 50 outside the hot chamber, and the first threaded fasteners 531 and the second threaded fasteners 532 can be manually installed in the threaded holes corresponding to the two first side surfaces and the two second side surfaces, and the first threaded fasteners 531 on one first side surface and the second threaded fasteners 532 on one second side surface can be tightened (since the first threaded fasteners 531 on another first side surface and the second threaded fasteners 532 on another second side surface are not tightened, the placement of the main section 61 is not affected). Then, the first clamping member 51 located above one end splicing section is installed on the top surface through two third threaded fasteners 533 (the two third threaded fasteners 533 are not tightened), and one end of the second clamping member 51 located above the other end splicing section is installed on the top surface through a third threaded fastener 533 (the third threaded fastener 533 is not tightened). The remaining three third threaded fasteners 533 are respectively installed in the threaded holes corresponding to the top surface.

[0130] Afterwards, the welding fixture 50 is transferred into the hot chamber, and the main body section 61 is placed between the two end joint sections in the frame 53 by a manually operated manipulator, and then the notches at both ends of the third clamping member 51 are respectively engaged with the corresponding two third threaded fasteners 533, and the notch at the other end of the second clamping member 51 is engaged with the corresponding third threaded fastener 533. Afterwards, the untightened threaded fasteners on the top surface, the first side surface, and the second side surface are tightened using the tightening device of the embodiment of the present application. The threaded fasteners may be bolts, screws, or screws, etc.

[0131] See also Fig.17 The tightening device of the embodiment of the present invention includes: a clamp 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 tightening mechanism 1030 and the second side tightening mechanism 1040 may 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 as to keep the welding fixture 50 immobile 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] The embodiment of the present application can tighten the threaded fasteners that need to be tightened on the top surface, first side surface and second side surface of the welding fixture 50 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.

[0135] In some embodiments, the top surface tightening mechanism 1020, the first side tightening mechanism 1030 and the second side tightening mechanism 1040 may be automatic tightening mechanisms, so that no manual intervention is required during the entire tightening process, thereby improving the tightening efficiency.

[0136] Compared with manually operating a manipulator to tighten the threaded fasteners, the embodiment of the present application tightens the threaded fasteners through a tightening mechanism, which can improve the assembly quality of the welding fixture 50 and help ensure that the welding base material remains stable during the welding process.

[0137] The embodiment of the present application also provides a method for preparing a radioactive impact sample, which is used to reassemble the broken end of the radioactive impact sample and two end splicing sections 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 the main body segment.

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

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

[0141] S4. Weld the main section and the two end joint sections to form a blank of the radioactive impact sample.

[0142] S5. During the welding process, the temperature of the main section is measured, and the quality of the blank of the radioactive impact sample is determined based on the measured temperature.

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

[0144] The preparation method of the embodiment of the present application can judge whether the blank 60 after welding is qualified according to the measured temperature, and process the qualified blank 60 into a radioactive shock sample, which is beneficial to ensure that the reconstructed radioactive shock sample can accurately reflect the performance of the original radioactive shock sample; at the same time, for the unqualified blank 60, there is no need to perform subsequent operations, saving time costs and avoiding subsequent invalid operations.

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

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

[0147] In some embodiments, when cutting the side section of the impact sample away from the notch, the cutting width can be relatively small, for example, 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 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 the 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 center of the main body section 61 to its end. In some embodiments, the preset position can be the position at 7 mm from the center of the main body section 61 to its end.

[0150] In some embodiments, in step S5, the step of judging whether the blank of the radioactive impact 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.

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

[0152] In some embodiments, when the temperature measured by the temperature measuring element 43 reaches a 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 embodiment of the present application, the preset temperature threshold can be determined by experiment. It is easy to understand that the preset temperature threshold is related to the position measured by the temperature measuring element 43 and the preset temperature threshold. The closer the distance between the position measured by the temperature measuring element 43 and the weld is, the higher the corresponding preset temperature threshold is. In some embodiments, the temperature of the position 7 mm from the center of the main body section 61 to its end cannot exceed 250°C.

[0154] In some embodiments, the step of processing the welded blank in step S6 may include: when using the auxiliary clamping part 813 to clamp the main section 61 of the blank 60, the auxiliary rotating part 812 can be rotated so that the weld 64 between the main section 61 and the end splicing section is facing the cutting piece 82; and then the electrode wire of the wire cutting of the two end splicing sections is used to cut the parts protruding from the main section 61.

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

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

[0157] In order to prevent the temperature of the main section 61 from exceeding the preset temperature threshold, during welding, it is necessary to make the melting zone (the melting zone is the area formed after the welding base material near the weld 64 melts during the welding process) narrow enough and the width of the weld 64 small enough to reduce the diffusion of heat to the middle of the main section 61, so that the temperature of the preset position of the main section 61 will not exceed the preset temperature threshold.

[0158] In some embodiments, the welding parameters of the electron beam welder welding device can be set to: welding speed 9mm, welding electron beam current 45mA, and focus position 3mm. The inventors of the present application conducted a combination test on different welding speeds, different welding electron beam currents, and different focus positions and found that welding with the above welding parameters is conducive to ensuring that the main body section 61 and the end splicing section are welded through, and is conducive to ensuring that the temperature of the main body section 61 does not exceed the preset temperature threshold.

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

[0160] The inventor of the present application found that when electron beam welding is performed, 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 of the electron beam and the welding position, resulting in uneven width of the weld. If the width of the weld 64 is uneven, the weld edge at some positions will be too close to the middle of the main body section 61, thereby increasing the temperature of the middle of the main body section 61, and ultimately causing the prepared radioactive impact sample blank to be unqualified.

[0161] The embodiment of the present application demagnetizes the main section 61 and the two end splicing sections before welding, which helps to ensure that the focusing position of the electron beam and the welding position are more accurate, thereby helping to avoid the temperature of the middle part of the main section 61 from rising during the welding process.

[0162] In some embodiments, before demagnetizing the main body section 61 and the two end splicing sections, the main body section 61 and the two end splicing sections can be surface cleaned and pretreated to remove impurities such as oil, oxides, etc. on the end surfaces to be welded of the main body section 61 and the two end splicing sections, thereby improving the welding quality.

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

[0164] In some embodiments, the main body section 61 and the two end splicing sections can be demagnetized using a demagnetizer. After the demagnetization is completed, the end surfaces of the main body section 61 and the two end splicing sections to be welded can be wiped again with acetone to remove impurities such as oil stains.

[0165] The following describes in detail the welding process using the method of the embodiment of the present application in combination with the drawings and specific embodiments.

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

[0167] The end surfaces to be welded of the main body section 61 and the spliced ​​body section 62 are polished step by step in sequence with 400 mesh, 600 mesh, and 800 mesh sandpaper to remove oxides. After polishing, the end surfaces to be welded of the main body section 61 and the spliced ​​body section 62 are ultrasonically cleaned with acetone to remove impurities such as oil stains and polishing liquid.

[0168] The main body section 61, the spliced ​​main body section 62 and the spliced ​​auxiliary section 63 are demagnetized by a demagnetizer. After the demagnetization is completed, the end surfaces to be welded of the main body section 61 and the spliced ​​main body section 62 can be wiped with acetone again to remove impurities such as oil stains.

[0169] The welding fixture 50 of the embodiment of the present application and the main section 61, the spliced ​​main section 62 and the spliced ​​auxiliary section 63 that have been subjected to polishing, ultrasonic cleaning, demagnetization and the like are assembled and placed on the mobile platform 31; then the temperature measuring assembly 40 is rotated so that the temperature measuring elements 43 on both sides are respectively abutted against the two preset positions of the main section 61 to perform real-time measurement of the welding temperature of the preset positions of the main section 61; and the chamber cover 12 of the electron beam welding device is closed.

[0170] Start the vacuum system to evacuate the vacuum chamber 10 formed by the chamber body 11 and the chamber cover 12. Control the mobile platform 31 to translate so that the position where the main body section 61 and the spliced ​​body section 62 meet can be moved to a position aligned with the electron beam; input welding parameters and start the electron beam welding device to use the electron beam to weld the position where the main body section 61 and the spliced ​​body section 62 meet. The welding parameters can be: welding speed 9mm, welding electron beam current 45mA, and focus position 3mm.

[0171] When the welding of the current weld is completed and the main body section 61 and the other end splicing section need to be welded, the position where the main body section 61 and the other end splicing section meet is moved to a position aligned with the electron beam by using the mobile platform 31, so as to weld the welding position by using the electron beam flow. After the welding is completed, the four splicing auxiliary sections 63, the two splicing main body sections 62 and the main body section 61 can form an integrated structure, that is, the blank 60 of the radioactive impact sample.

[0172] The blank 60 is transported into the hot chamber, and the hot chamber manipulator places the blank 60 on the blank holder 71 on the operating table, and the blank holder 71 clamps the blank 60. The blank 60 is grabbed from the blank holder 71 by the transport clamp 92 of the blank transport member 90. The blank 60 is placed on the cutting auxiliary clamp 81 of the slow-moving wire electric discharge machine 80 by the transport clamp 92 of the blank transport member 90, and the blank 60 is clamped.

[0173] After that, the radial and axial coaxial errors of the slow-feeding wire EDM machine tool 80 are automatically offset and corrected. The data obtained after two close discharges of the molybdenum wire can be used to obtain the straightness of the cutting auxiliary clamp 81 at 90 degrees, and coordinate offset correction is performed at the same time. After rotation and correction, the processing coordinates and the actual coordinates are basically coincident, avoiding the processing error caused by the fixture error.

[0174] According to the previously calibrated coordinates, the molybdenum wire directly cuts the two second splicing surfaces 6221 of the second end splicing section 622 in sequence with the cutting auxiliary clamp 81 at the 0 degree position close to the main section 61, and then rotates the two auxiliary clamps 813 90 degrees to cut the first splicing surface 6211 of the second end splicing section 622 of the blank 60 in sequence, and then cuts the first end splicing section 621 of the blank 60 in a similar cutting manner, and finally cuts a V-shaped notch on the second surface 612 of the main section 61 to finally obtain a 10mm×10mm×55mm standard Charpy impact specimen.

[0175] Regarding the embodiments of the present application, it should also be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other to obtain new embodiments.

[0176] The above description is only a 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 based on the protection scope of the claims.

Claims

1. A radioactive impact sample preparation system, used to reassemble a main body section formed by decapitation of a radioactive impact sample and two end splicing sections into a new radioactive impact sample, characterized in that: The preparation system comprises: A fixing device, used to arrange the two end splicing sections at the two ends of the main section respectively, and to fix the relative positions between the two end splicing sections and the main section; A welding device, used 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; A processing device, used for processing the blank to form the radioactive impact sample; Wherein, the welding device comprises a temperature measuring component for measuring the temperature of the main body segment during welding.

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

3. The preparation system according to claim 2, characterized in that: The fixing device also includes: A tightening device is used to tighten the threaded fastener of the welding fixture.

4. The preparation system according to claim 1, characterized in that: The processing device comprises: A blank holder, configured to hold an end splicing section of the blank; A cutting device, the cutting device comprising a cutting auxiliary clamping piece and a cutting piece, the cutting auxiliary clamping piece is configured to clamp the main body section of the blank, and the cutting piece is configured to cut the blank clamped by the cutting auxiliary clamping piece to form a radioactive impact sample; The blank transporting member is configured to clamp the other end joint section of the blank so as to transfer the blank from the blank holding member to the cutting auxiliary clamping member.

5. The preparation system according to claim 4, characterized in that: The cutting device comprises a cutting auxiliary clamp and a cutting piece. The cutting auxiliary clamp is configured to clamp the main body section of the blank, and the cutting piece is configured to cut the blank clamped by the cutting auxiliary clamp to form a radioactive impact sample.

6. The preparation system according to claim 2, characterized in that: The welding device comprises: A body portion configured to form a vacuum chamber; an electron gun, for providing an electron beam to the vacuum chamber; A mobile platform, used for installing the welding fixture, and configured to be able to drive the welding fixture to translate in the vacuum chamber, so as to weld the two end splicing sections and the main body section by using the electron beam; The temperature measuring assembly is used to measure the temperature of the main body section in the welding fixture during welding.

7. The preparation system according to claim 6, characterized in that: The temperature measurement component comprises: a plurality of temperature measuring elements, used for abutting against the main body section to measure the temperature of the main body section; A plurality of protection members, each of the temperature measuring elements extends within and protrudes from one of the protection members, and each of the protection members is used to prevent a sputtering beam formed during the electron beam welding from contacting a corresponding one of the temperature measuring elements.

8. A method for preparing a radioactive impact sample, for reassembling a broken end of a radioactive impact sample and two end splicing sections into a new radioactive impact sample, characterized in that: The preparation method comprises: Cutting off the two side 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 section; The main body section and the two end splicing sections are welded to form a blank of the radioactive impact sample, wherein the temperature of the main body section is measured during the welding process, 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 the radioactive impact sample.

9. The preparation method according to claim 8, characterized in that: The step of judging whether the blank of the radioactive impact sample is qualified according to the measured temperature comprises: 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.

10. The preparation method according to claim 8, characterized in that: Before splicing the main body section and the two end splicing sections in a preset manner, the preparation method further includes: The main body section and the two end splicing sections are demagnetized.

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