Small punch test system and its clamp tightening device

Abstract

This application relates to the technical field of assembling or disassembling components, and particularly to a small punch testing system and its clamp tightening device. The clamp tightening device includes: a first clamp holding part, a second clamp holding part, a rotating member, and a connecting assembly. The first clamp holding part holds a first clamp; the second clamp holding part holds a second clamp; the rotating member drives the second clamp holding part to rotate about a rotation axis, thereby driving the second clamp to rotate; the connecting assembly connects the second clamp holding part and the rotating member, and the connecting assembly is configured such that the second clamp holding part can deviate from the rotation axis to facilitate the establishment of a threaded connection between the second clamp and the first clamp during rotation. Even if there is a slight misalignment between the threads of the second clamp and the first clamp, the clamp tightening device provided by the embodiments of this application can still facilitate the establishment of a threaded connection between the second clamp and the first clamp by deviating the second clamp holding part from the rotation axis.

Description

Technical Field

[0001] The embodiments of this application relate to the technical field of assembling or disassembling components, and particularly to a small punch test system and its clamp tightening device. Background Technology

[0002] This section provides background information relevant to this application only and does not necessarily constitute prior art.

[0003] Initial defects or microcracks in materials are highly susceptible to crack propagation under high pressure, severely impacting the safe operation of equipment. The small punch test, as a micro-sample testing method, can provide relatively accurate material properties. The small punch test requires extremely small sample sizes (sample diameter less than 10.0 mm, e.g., 3 mm or 8 mm, thickness less than or equal to 0.5 mm, e.g., 0.25 mm or 0.5 mm), making it possible to obtain the actual fracture mechanical properties of in-service equipment.

[0004] Currently, conducting small punch tests on radioactive samples presents significant challenges. Summary of the Invention

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

[0006] To address the aforementioned issues, embodiments of this application provide a small punch test system and its clamp tightening device.

[0007] In a first aspect, this application provides a clamp tightening device suitable for a small punch test system. The small punch test system uses a threaded first clamp and a second clamp to hold a punch and a circular sample together, and uses the punch to apply force to the circular sample to perform a small punch test. The device is used to tighten the first clamp and the second clamp, and includes: a first clamp holding part, a second clamp holding part, a rotating member, and a connecting assembly. The first clamp holding part holds the first clamp; the second clamp holding part holds the second clamp; the rotating member drives the second clamp holding part to rotate about a rotation axis, thereby driving the second clamp to rotate; the connecting assembly connects the second clamp holding part and the rotating member, and the connecting assembly is configured such that the second clamp holding part can deviate from the rotation axis to facilitate the establishment of a threaded connection between the second clamp and the first clamp during rotation.

[0008] The clamp tightening device provided in the embodiments of this application, even if there is a slight misalignment between the threads of the second clamp and the first clamp during the tightening process of the clamp assembly, can ensure that the second clamp is not deviated from the rotation axis because the connecting component can keep the second clamp from deviating from the rotation axis. This allows the second clamp to smoothly establish a threaded connection with the first clamp during rotation, avoiding the situation where the rotating part forcibly establishes a threaded connection between the second clamp and the first clamp, which would prevent the disc sample from being clamped and affect the test results.

[0009] Secondly, embodiments of this application provide a small punch test system for applying force to a radioactive disc sample using a punch to perform a small punch test on the disc sample. The test system includes: a clamp assembly, a loading device, a clamp tightening device provided in the first aspect of this application, and a testing device. The clamp assembly includes a threaded first clamp and a second clamp for holding the disc sample and the punch; the loading device is used to place the disc sample and the punch into the second clamp; the clamp tightening device is used to tighten the first clamp and the second clamp after the disc sample and the punch are placed into the second clamp using the loading device; the testing device is used to apply force to the punch in the assembled clamp assembly and measure the deformation of the disc sample under the action of the force.

[0010] These and other advantages of this application will become more apparent from the following detailed description of preferred embodiments in conjunction with the accompanying drawings. Attached Figure Description

[0011] To further illustrate the above and other advantages and features of this application, the specific embodiments of this application will be described in more detail below with reference to the accompanying drawings. The drawings, together with the following detailed description, are included in and form a part of this specification. Elements having the same function and structure are indicated by the same reference numerals. It should be understood that these drawings only depict typical examples of this application and should not be considered as limiting the scope of this application.

[0012] Figure 1 This is a partial structural schematic diagram of a small punch test system according to an embodiment of this application, where the test device is not shown. Figure 2 This is a schematic diagram of the structure of the testing device according to an embodiment of this application after being assembled in a tensile testing machine; Figure 3 This is a schematic diagram of the structure after the punch and the disc sample are assembled in the fixture assembly according to an embodiment of this application; Figure 4 yes Figure 1 Top view of the small punch test system shown; Figure 5 yes Figure 1A partially enlarged schematic diagram of the clamping device of the small punch test system shown in the figure, where the clamping components are not shown; Figure 6 It is to assemble and arrange the fixtures in Figure 5 The diagram shown is a structural schematic of the clamp tightening device. Figure 7 yes Figure 1 A schematic diagram of the sample receiving and distributing section of the small punch test system shown. Figure 8 yes Figure 1 A partial schematic diagram of the sample receiving and distributing section of the small punch test system shown. Figure 9 yes Figure 1 The diagram shows the structure of the loading section of the small punch test system. Figure 10 yes Figure 3 An exploded view of the punch and disc sample and the fixture assembly shown. Figure 11 yes Figure 1 A schematic diagram of the punch receiving and distribution section of the small punch test system shown; Figure 12 yes Figure 11 A cross-sectional schematic diagram of the punch receiving and distribution section shown. Figure 13 yes Figure 2 A partial structural diagram of the testing device; Figure 14 yes Figure 13 A schematic diagram of the test device from another angle.

[0013] It should be noted that the accompanying drawings are not necessarily drawn to scale, but are shown only in a schematic manner without affecting the reader's understanding.

[0014] Explanation of reference numerals in the attached figures: 10. Fixture assembly; 11. First fixture; 111. First retaining mating part; 112. First positioning mating part; 113. First cover; 1131. First channel; 114. First ring; 1141. First receiving groove; 12. Second clamp; 121. Second cover; 1211. Sample slot; 1212. First measuring slot; 1213. Second measuring slot; 1214. Guide hole section; 122. Second ring; 1221. Second receiving slot; 123. Third ring; 21. Sample receiving and dispensing section; 211. Sample receiving component; 2111. Receiving trough; 2112. Transport trough; 212. Single sample container; 2121. Single sample container trough; 21211. V-shaped surface; 2122. Holding component; 2123. Plate component; 213. Vibrating component; 214. Support component; 2141. Support trough; 215. Collector component; 22. Clamp tightening device; 221. First clamp holding part; 2211. First holding member; 2212. First positioning member; 222. Second clamp holding part; 2221. Holding groove; 2222. Cut surface; 223. Rotating member; 224. Connecting assembly; 2241. Fastener; 2242. Elastic member; 225. Moving member; 23. Loading section; 231. Sample handling unit; 232. Moving parts; 233. Lifting parts; 234. Punch clamping parts; 235. Positioning clamping parts; 24. Punch receiving and distributing section; 241. Ball receiving component; 242. Ball outlet pipe; 2421. Main body section; 24211. First vertical extension section; 24212. Inclined extension section; 24213. Second vertical extension section; 2422. Cover; 2423. Through hole; 243. Ball distributing component; 2431. Distributing body; 24311. Distributing channel; 24312. First channel; 24313. Second channel; 2432. Rod; 24321. Distributing hole; 2433. Reset Components; 2434, First limiting component; 2435, Second limiting component; 2436, Third limiting component; 2437, Connecting component; 244, Detection component; 2441, Signal transmitting component; 2442, Signal receiving component; 245, Support column; 25, Horizontal moving component; 251, Base plate; 252, Vertical plate; 2521, Lifting slide rail; 26, Horizontal slide rail; 27, Punch rod holding part; 28, Positioning component holding part; 29, Second clamp storage part; 201, Excess sample collection component; 202, Test platform; 30. Testing device; 31. Mounting component; 311. First mounting component; 3111. Mounting body; 3112. Mounting groove; 3113. Support part; 3114. Connecting part; 312. Second mounting component; 3121. Heat dissipation hole; 32. Deformation measuring component; 33. Force applying component; 34. Temperature measuring component; 35. Cooling component; 351. Cooling bottom shell; 352. Cooling cover; 3521. Overflow hole; 3522. Top through hole; 353. Collection tray; 36. Heating half component; 361. Heating tank; 37. Cooling rotating component; 38. Cooling lifting component; 41. Tensile testing machine; 411. Base; 412. Guide component; 413. Force bar; 42. Punch rod; 420. Flat-head punch rod; 4201. Rod body; 4202. Rod end; 421. Punch ball; 44. Circular sample; 45. Positioning component; 451. Positioning channel; 4511. First groove; 4512. Second groove; 4513. Guide groove; 452. Positioning body; 453. Positioning protrusion; 50. Separator; 51. Disc; 52. Push rod; 60. Recycled parts. Detailed Implementation

[0015] Exemplary embodiments of this application will be described below with reference to the accompanying drawings. For clarity and brevity, not all features of actual implementations are described in the specification. However, it should be understood that many implementation-specific decisions must be made in the development of any such actual embodiment to achieve the developer's specific goals, such as complying with constraints related to the system and business, and these constraints may vary depending on the implementation. Furthermore, it should be understood that while development work can be very complex and time-consuming, such development work is merely a routine task for those skilled in the art who benefit from the content of this application.

[0016] It should also be noted that, in order to avoid obscuring this application with unnecessary details, only the equipment structure and / or processing steps closely related to the solution according to this application are shown in the accompanying drawings, while other details that are not closely related to this application are omitted.

[0017] It should be noted that, unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning as understood by a person with ordinary skills in the field to which this application pertains.

[0018] In the description of the embodiments of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0019] When performing small punch tests on samples, a clamping assembly is required to assemble the punch and the sample together. When the sample is a radioactive sample, a robotic arm is needed to operate it in a heated chamber. Due to the extremely small size of the sample and the punch, it is difficult to achieve the above assembly process using only a robotic arm.

[0020] The inventors of this application have discovered that in the related technology, during the process of tightening the clamp assembly using the clamp tightening device, when the second clamp contacts the first clamp, there may sometimes be a slight misalignment of the threads of the second clamp and the first clamp, making it difficult to connect the second clamp and the first clamp smoothly together; if the second clamp and the first clamp are forcibly connected by threads at this time, the positioning part cannot press the disc sample tightly, affecting the test results.

[0021] To address the aforementioned problems, embodiments of this application provide a clamping device suitable for a small punch testing system. The small punch testing system uses a threaded first clamp and a second clamp to hold a punch and a circular sample together, and uses the punch to apply force to the circular sample to perform a small punch test. The clamping device is used to tighten the first clamp and the second clamp.

[0022] See Figure 1 , Figure 5 as well as Figure 6 , Figure 1 This is a partial structural schematic diagram of a small punch test system according to an embodiment of this application, where the test device is not shown. Figure 5 yes Figure 1 A partially enlarged schematic diagram of the clamping device 22 of the small punch test system shown, where the clamp assembly 10 is not shown; Figure 6 It is to assemble and arrange the fixtures in Figure 5 The diagram shows the structure of the clamp tightening device 22. The clamp tightening device 22 of this embodiment may include: a first clamp holding part 221, a second clamp holding part 222, a rotating member 223, and a connecting assembly 224. The first clamp holding part 221 holds the first clamp 11. The second clamp holding part 222 holds the second clamp 12. The rotating member 223 drives the second clamp holding part 222 to rotate around a rotation axis, thereby driving the second clamp 12 to rotate. The connecting assembly 224 connects the second clamp holding part 222 and the rotating member 223. The connecting assembly 224 is configured such that the second clamp holding part 222 can deviate from the rotation axis, facilitating the establishment of a threaded connection between the second clamp 12 and the first clamp 11 during rotation. In such an embodiment, even if the threads of the second clamp 12 and the first clamp 11 are slightly misaligned, the second clamp 12 can smoothly establish a threaded connection with the first clamp 11 during rotation by setting the connecting component 224 so that the second clamp holding part 222 can deviate from the rotation axis.

[0023] In some embodiments, the connecting assembly 224 may include a plurality of fasteners 2241 and an elastic element 2242. The fasteners 2241 connect the rotating member 223 and the second clamp holding portion 222, and all fasteners 2241 are spaced apart around a rotation axis. The elastic element 2242 is disposed between the rotating member 223 and the second clamp holding portion 222 to provide a force deviating from the rotation axis to the second clamp holding portion 222. When the second clamp 12 contacts the first clamp 11, and the rotating member 223 drives the second clamp 12 to rotate, the elastic element 2242 provides a force deviating from the rotation axis to the second clamp holding portion 222, causing the second clamp 12 to wobble slightly relative to the rotation axis, facilitating a threaded connection with the first clamp 11.

[0024] In some embodiments, fastener 2241 may be a screw.

[0025] In some embodiments, the elastic element 2242 may be a spring sleeved on the fastener 2241. Because this application provides multiple fasteners 2241, and all fasteners 2241 are spaced apart around the rotation axis, the compression and extension of the springs sleeved on the fasteners 2241 can more flexibly provide a force deviating from the rotation axis to the second clamp holding portion 222.

[0026] In some embodiments, the clamp tightening device 22 may further include a movable member 225 for driving the rotating member 223 and the second clamp holding part 222 to move toward the first clamp holding part 221, so that the second clamp 12 can contact the first clamp 11. By setting the movable member 225, the second clamp holding part 222 can be automatically driven to move toward the first clamp holding part 221 without the need for remote operation by an operator via a robotic arm. Even if the threads of the second clamp 12 and the first clamp 11 are slightly misaligned after the movable member 225 drives the rotating member 223 and the second clamp holding part 222 to move toward the first clamp holding part 221, the connecting component 224 can also deviate the second clamp holding part 222 from the rotation axis, so that the second clamp 12 can smoothly establish a threaded connection with the first clamp 11 during rotation.

[0027] In some embodiments, the second clamp holding portion 222 is provided with a holding groove 2221, the holding groove 2221 having a cross-section 2222; the cross-section of the second clamp 12 matches the holding groove 2221 so that the second clamp 12 can enter the holding groove 2221. The cross-section 2222 is used to ensure that the second clamp 12 remains relatively stationary with respect to the holding groove 2221 in the circumferential direction after the second clamp 12 enters the holding groove 2221, thereby driving the second clamp 12 and the second clamp holding portion 222 to rotate by the rotating member 223.

[0028] In some embodiments, the retaining groove 2221 has six facets 2222 with hexagonal cross-sections. The corners between two adjacent facets 2222 are rounded to facilitate the smooth placement of the second clamp 12 into the positioning groove.

[0029] In some embodiments, the first clamp holding portion 221 may include a first retainer 2211, see [link to previous document]. Figure 10 The first clamp 11 may include a first retaining engagement 111. Through the engagement of the first retaining engagement 2211 and the first retaining engagement 111, the first clamp 11 can be held by the first clamp holding part 221. Thus, the rotating part 223 drives the second clamp 12 and the second clamp holding part 222 to rotate, so that the second clamp 12 is threadedly engaged with the first clamp 11.

[0030] In some embodiments, the first clamp holding portion 221 may include a first positioning member 2212, and the first clamp 11 includes a first positioning mating member 112. Through the engagement of the first positioning member 2212 and the first positioning mating member 112, the first clamp 11 can remain relatively stationary with respect to the first holding member 2211 in the circumferential direction. Thus, when the second clamp 12 and the second clamp holding portion 222 are rotated by the rotating member 223, and the second clamp 12 is threadedly engaged with the first clamp 11, the first clamp 11 can be kept from rotating.

[0031] In some embodiments, the first retaining member 2211 can be two opposing bosses; the first retaining mating member 111 can be two oppositely arranged sliding grooves. Through the sliding engagement of the bosses and sliding grooves, the first clamp 11 can be held by the first clamp retaining part 221. Furthermore, the mating structure of the bosses and sliding grooves facilitates remote operation of the robotic arm by the operator.

[0032] In some embodiments, the first positioning member 2212 can be a positioning pin; the first positioning mating member 112 can be a positioning groove that is off-axis. By inserting the positioning pin into the positioning groove, the rotation of the first clamp 11 can be prevented, and the mating structure between the positioning pin and the positioning groove is conducive to the operator remotely operating the robot.

[0033] Embodiments of this application also provide a small punch test system for applying force to a radioactive disc sample using a punch to perform a small punch test on the radioactive disc sample.

[0034] See Figures 1 to 6 The testing system may include: a fixture assembly, a loading device, a fixture tightening device 22 according to any embodiment of this application, and a testing device 30. The fixture assembly includes a first fixture 11 and a second fixture 12. The second fixture 12 is used to receive the disc sample 44 and the punch 42, and the first fixture 11 is used to cooperate with the second fixture 12 to fix the position of the disc sample 44 and the punch 42.

[0035] The loading device is used to place the disc sample 44 and the punch 42 into the second clamp 12; the clamp tightening device 22 is used to tighten the first clamp 11 and the second clamp 12 after the disc sample 44 and the punch 42 are placed into the second clamp 12 by the loading device; the testing device 30 is used to apply a force to the punch 42 in the assembled clamp assembly 10 and to measure the amount of deformation of the disc sample 44 under the action of the force.

[0036] The embodiments of this application, by providing a loading device and a clamping tightening device 22, enable the loading device to assemble the disc sample 44 and the punch 42 together with the second clamp 12, and the clamping tightening device 22 to tighten the first clamp 11 and the second clamp 12. Furthermore, the testing device 30 can be used to perform mechanical testing on the disc sample 44. Compared to assembly using only a robotic arm within a hot chamber, the embodiments of this application facilitate easier assembly of the disc sample 44 and the punch 42 with the clamp assembly 10 within the hot chamber.

[0037] In some embodiments, the loading device includes a sample receiving and distributing unit 21, a second clamping storage unit 29, and a loading unit 23. The sample receiving and distributing unit 21 receives multiple circular sample pieces 44 and distributes one circular sample piece 44. The second clamping storage unit 29 stores a second clamp 12. The loading unit 23 places the distributed circular sample piece 44 into the second clamp 12 stored in the second clamping storage unit 29. In such an embodiment, a robotic arm can pour multiple circular sample pieces 44 into the sample receiving and distributing unit 21, then the sample receiving and distributing unit 21 distributes one circular sample piece 44, and the loading unit 23 places the distributed circular sample piece 44 into the second clamp 12. Since it is difficult for a robotic arm to grasp a single circular sample piece 44, the above operation is simpler for the robotic arm.

[0038] In some embodiments, the second clamp storage section 29 may form a storage slot in which the second clamp 12 is placed.

[0039] In some embodiments, Figure 7 yes Figure 1 A schematic diagram of the sample receiving and distributing section 21 of the small punch test system shown; Figure 8 yes Figure 1 A partial schematic diagram of the sample receiving and distributing section 21 of the small punch test system is shown below. Figure 7 and Figure 8 As shown, the sample receiving and distributing unit 21 includes a sample receiving member 211, a single sample container 212, and a vibrating member 213. The sample receiving member 211 is used to receive multiple disc samples 44; the single sample container 212 is configured to accommodate only one disc sample 44; the vibrating member 213 is used to drive the sample receiving member 211 to vibrate, so that the multiple disc samples 44 can be dispersed and moved toward the single sample container 212, and to allow one disc sample 44 to enter the single sample container 212.

[0040] In this embodiment, a robotic arm can be used to pour multiple disc samples 44 into the sample receiving container 211. Then, under the action of the vibrating element 213, the disc samples 44 move towards the single sample receiving container 212. After one disc sample 44 enters the single sample receiving container 212, the vibrating element 213 can be turned off to prevent other disc samples 44 from continuing to move into the single sample receiving container 212, thereby allowing the sample receiving and distributing unit 21 to distribute one disc sample 44. In this way, a single disc sample 44 can be picked up using other devices (such as the feeding unit 23 mentioned below), avoiding the difficulty of successfully testing a single disc sample 44 if two or more disc samples 44 are picked up at the same time.

[0041] In some embodiments, the sample receiving member 211 forms a receiving groove 2111 and a transport groove 2112 communicating with the receiving groove 2111. The receiving groove 2111 is used to receive multiple disc samples 44. The single sample receiving member 212 forms a single sample receiving groove 2121 communicating with the transport groove 2112. The single sample receiving groove 2121 is configured to accommodate only one disc sample 44. When the vibrating member 213 causes the sample receiving member 211 to vibrate, the multiple disc samples 44 in the receiving groove 2111 can enter the transport groove 2112, and one disc sample 44 can enter the single sample receiving groove 2121.

[0042] In such an embodiment, a robotic arm can be used to pour multiple disc samples 44 into the receiving groove 2111. Then, under the action of the vibrating element 213, the disc samples 44 move along the transport groove 2112. After one disc sample 44 enters the single sample receiving groove 2121, the vibrating element 213 can be turned off to prevent other disc samples 44 from continuing to move into the single sample receiving groove 2121, so that the sample receiving and distributing unit 21 distributes one disc sample 44.

[0043] In some embodiments, the vibrating element 213 may be disposed at the bottom of the sample receiver 211 to drive the sample receiver 211 to vibrate as a whole.

[0044] In some embodiments, the bottom surfaces of the receiving groove 2111 and the transport groove 2112 are inclined surfaces extending downward toward the single sample receiving groove 2121, so that the disc sample 44 can move toward the single sample receiving groove 2121 under the action of the vibrating member 213.

[0045] In some embodiments, the width of the transport trough 2112 is smaller than the width of the receiving trough 2111, so that under the action of the vibrating element 213, the disc sample 44 moves faster toward the single sample receiving trough 2121, and avoids scattering in all directions.

[0046] In some embodiments, the surface of the single sample receiving slot 2121 facing the transport slot 2112 is a V-shaped surface 21211, and the distance between the V-shaped surface 21211 and the transport slot 2112 is less than the diameter of a circular sample 44. In such an embodiment, due to the effect of the V-shaped surface 21211, it is advantageous to ensure that only one circular sample 44 is contained in the single sample receiving slot 2121, thereby facilitating the loading unit 23 to remove the single circular sample 44 and avoiding the loading unit 23 from picking up more than two circular samples 44 at the same time, which would make it difficult to conduct tests on a single circular sample 44 smoothly.

[0047] In some embodiments, the sample receiving and dispensing unit 21 further includes a support member 214 and a collector 215. A single sample container 212 is removably disposed on the support member 214; the collector 215 is configured to cooperate with the support member 214 to collect other disc samples 44 from the transport trough 2112 after the single sample container 212 has been removed. In such an embodiment, after the test is completed, a robotic arm can be used to remove the single sample container 212 from the support member 214, and the vibration member 213 can be activated to move the disc samples 44 in the transport trough 2112 toward the support member 214 and into the collector 215, thereby achieving the recovery of unused disc samples 44.

[0048] In some embodiments, the support member 214 forms a support groove 2141, and the sample container 212 is movably disposed within the support groove 2141; the support member 214 also forms a support space, which is directly below and communicates with the support groove 2141. The collection member 215 is movably disposed in the support space so that after the sample container 212 is removed from the support groove 2141, the disc sample 44 in the transport trough 2112 can enter the support groove 2141 and fall into the collection member 215 under the action of the vibration member 213.

[0049] In such an embodiment, after the test is completed, a robotic arm can be used to remove the single sample container 212 from the support groove 2141, and the vibration element 213 can be activated to move the disc sample 44 in the transport groove 2112 toward the support groove 2141 and into the support groove 2141, from where it falls into the collection container 215. Then, the robotic arm can be used to remove the collection container 215 from the support space to achieve the recovery of the unused disc sample 44.

[0050] In some embodiments, the single-sample receiving member 212 may include a plate 2123 and a gripper 2122 disposed on the plate 2123. The gripper 2122 is used to facilitate gripping by a robotic arm. The plate 2123 is movably disposed in the support groove 2141, and the end of the plate 2123 facing the transport groove 2112 and located above the support groove 2141 is recessed inward to form a V-shaped surface 21211. This V-shaped surface 21211 and the support member 214 together form the single-sample receiving groove 2121. In such an embodiment, the robotic arm can remove the plate 2123 from the support groove 2141 using the gripper 2122, and then, under the action of the vibrator 213, the remaining circular sample 44 in the transport groove 2112 enters the support groove 2141.

[0051] In some embodiments, the distance between the support groove 2141 and the transport groove 2112 is less than the diameter of a circular sample 44, thereby facilitating the smooth entry of the remaining circular sample 44 in the transport groove 2112 into the support groove 2141 under the action of the vibrating element 213.

[0052] In some embodiments, the portion of the transport trough 2112 that connects with the single sample receiving trough 2121 may have an isosceles trapezoidal shape to converge toward the single sample receiving trough 2121, that is, the width of the transport trough 2112 becomes narrower toward the single sample receiving trough 2121, which facilitates the smooth delivery of a circular sample 44 into the single sample receiving trough 2121.

[0053] In some embodiments, Figure 9 yes Figure 1 A schematic diagram of the loading section 23 of the small punch test system is shown; see also Figure 9 The loading section 23 includes a sample pick-and-place member 231, a moving member 232, and a lifting member 233. The sample pick-and-place member 231 picks up a circular sample 44 located in the single sample receiving slot 2121 and releases the circular sample 44 into the second clamp storage section 29. The moving member 232 moves the sample pick-and-place member 231 to directly above the single sample receiving slot 2121 and directly above the second clamp storage section 29. The lifting member 233 moves the sample pick-and-place member 231 up and down, so that the sample pick-and-place member 231 can contact the circular sample 44 to pick it up, and can enter the second clamp 12 to release the circular sample 44 into the second clamp 12.

[0054] In some embodiments, the moving member 232 is a rotating member to drive the sample pick-and-place member 231 to rotate. For example, when the sample pick-and-place member 231 rotates 180 degrees, the sample pick-and-place member 231 is located directly above the single sample receiving slot 2121; when the sample pick-and-place member 231 rotates 180 degrees again, the sample pick-and-place member 231 is located directly above the second clamp storage section 29.

[0055] In some embodiments, the sample pick-up and drop-down member 231 is configured to pick up the disc sample 44 using negative pressure and release the disc sample 44 using positive pressure.

[0056] Figure 4 yes Figure 1 Top view of the small punch test system shown; see also Figure 4 In some embodiments, the loading device further includes a punch holding part 27 for holding the punch 42; the feeding part 23 is also used to place the punch 42 into the second clamp 12 in the second clamp storage part 29.

[0057] In some embodiments, the punch retainer 27 includes a plurality of punch retainer grooves, into which the lower part of the punch 42 is placed.

[0058] See Figure 9 The loading section 23 includes a punch clamping member 234 for clamping the punch 42 from the punch holding section 27 to place the punch 42 in the second fixture 12. It is disposed opposite to the sample pick-and-place member 231. Both the punch clamping member 234 and the sample pick-and-place member 231 are connected to the rotating member 223 so that the rotating member 223 drives the punch clamping member 234 and the sample pick-and-place member 231 to rotate, so that one of the punch clamping member 234 and the sample pick-and-place member 231 is aligned with the second fixture 12 in the second fixture storage section 29.

[0059] In some embodiments, the punch is a one-piece structure, and the one-piece punch is a round-head punch.

[0060] In some embodiments, the punch 42 is a split structure, comprising a flat-head punch 420 and a punch ball 421, with a punch holder 27 for holding the flat-head punch 420. Correspondingly, a punch clamp 234 clamps the flat-head punch 420 from the punch holder 27. In such embodiments, the loading device further includes a punch receiving and distributing section 24 and a horizontal moving member 25. The punch receiving and distributing section 24 receives a plurality of punch balls 421 and distributes one of the punch balls 421 to fall. The horizontal moving member 25 moves the second clamp storage section 29 so that the punch ball 421 falling from the punch receiving and distributing section 24 can enter the second clamp 12.

[0061] In this embodiment, a robotic arm can pour multiple punch balls 421 into the punch receiving and dispensing section 24, and then the punch receiving and dispensing device 24 dispenses one punch ball 421, which falls into the second clamp 12. Since it is difficult for the robotic arm to grasp a single punch ball 421, this operation is simpler for the robotic arm.

[0062] Figure 11 yes Figure 1A schematic diagram of the punch receiving and distributing section 24 of the small punch test system shown; Figure 12 yes Figure 11 A cross-sectional schematic diagram of the punch receiving and distributing section 24 is shown; as shown Figure 11 and Figure 12 As shown, in some embodiments, the punch receiving and distributing unit 24 includes: a ball receiving member 241, a ball outlet pipe 242, and a ball distributor 243. The ball receiving member 241 is used to receive a plurality of punch balls 421; the outlet end of the ball outlet pipe 242 is suspended; the ball distributor 243 is used to allow one of the punch balls 421 from the ball receiving member 241 to enter the ball outlet pipe 242 and fall from the outlet end of the ball outlet pipe 242.

[0063] In some embodiments, the ball distributor 243 includes a distributor body 2431 and a rod 2432. The distributor body 2431 forms a distributor channel 24311 and a first channel 24312 and a second channel 24313 communicating with the distributor channel 24311. The first channel 24312 and the second channel 24313 are staggered from each other. The ball receiver 241 and the ball outlet pipe 242 are respectively connected to the first channel 24312 and the second channel 24313. The rod 2432 is provided with a distribution hole 24321. The rod 2432 is movably disposed in the distribution channel 24311 so that the distribution hole 24321 can be aligned with the first channel 24312 or the second channel 24313. When the distribution hole 24321 is aligned with the first channel 24312, a punch ball 421 in the ball receiving member 241 can enter the distribution hole 24321 through the first channel 24312. When the distribution hole 24321 is aligned with the second channel 24313, the punch ball 421 that has entered the distribution hole 24321 can enter the ball outlet pipe 242 through the second channel 24313.

[0064] In this embodiment, since the ball receiver 241 is connected to the first channel 24312, the punch ball 421 in the ball receiver 241 will enter the first channel 24312. When it is necessary to put a punch ball 421 into the clamp assembly, the lever 2432 can be moved relative to the distribution channel 24311 to align its distribution hole 24321 with the first channel 24312. At this time, the punch ball 421 in the ball receiver 241 of the first channel 24312 enters the distribution hole 24321. Then, the lever 2432 is moved relative to the distribution channel 24311 to align its distribution hole 24321 with the second channel 24313. The punch ball 421 in the distribution hole 24321 enters the second channel 24313, thereby entering the ball outlet pipe 242 connected to the second channel 24313. In this process, the robotic arm only needs to move the lever 2432 relative to the distribution channel 24311 to distribute the punch ball 421.

[0065] In some embodiments, the ball receiver 241 is connected to the distribution body 2431 above the distribution body 2431 so that the punch ball 421 in the ball receiver 241 can enter the first channel 24312 under the action of gravity; the ball outlet pipe 242 is connected to the distribution body 2431 below the distribution body 2431 so that the punch ball 421 entering the second channel 24313 can enter and exit the ball outlet pipe 242 under the action of gravity.

[0066] In some embodiments, the ball receiver 241 may be funnel-shaped to receive multiple punch balls 421 poured in by the robotic arm, while allowing the punch balls 421 to enter the first channel 24312 under gravity. The outlet size at the bottom of the ball receiver 241 may be substantially the same as the size of the first channel 24312.

[0067] In some embodiments, the size of the first channel 24312 is 1.1-1.3 times the size of the punch ball 421, so that the punch balls 421 entering the first channel 24312 can only be distributed along the axial direction (or length direction) of the first channel 24312, avoiding two or more punch balls 421 from entering the distribution hole 24321 at the same time. In some embodiments, the thickness of the rod 2432, i.e. the height of the distribution hole 24321, is 1.1-1.3 times the outer diameter of the punch ball 421, to ensure that only one ball punch can be accommodated in the distribution hole 24321, avoiding two or more punch balls 421 from entering the distribution hole 24321 at the same time when the distribution hole 24321 is aligned with the first channel 24312.

[0068] In some embodiments, the ball distributor 243 further includes a reset member 2433, which provides a force to the rod 2432 when the rod 2432 moves to align the distribution hole 24321 with the second channel 24313, thereby moving the rod 2432 from the position where the distribution hole 24321 aligns with the second channel 24313 (from the current position) to the position where the distribution hole 24321 aligns with the first channel 24312. In such an embodiment, the robot only needs to move the rod 2432 once relative to the distribution channel 24311 to distribute the punch ball 421.

[0069] In some embodiments, the reset member 2433 may be a spring sleeved on the rod 2432.

[0070] In some embodiments, the punch receiving and distributing unit 24 may further include a support column 245, and the distributing body 2431 is connected to the support column 245 for support by the support column 245. The ball distributing member 243 may include a connector 2437, and the distributing body 2431 is connected to the support column 245 through the connector 2437.

[0071] The rod 2432 is movably mounted on the support column 245. The support column 245 may have a through hole through which the rod 2432 passes into the distribution channel 24311.

[0072] In some embodiments, the ball distributor 243 may include a first limiting member 2434 and a second limiting member 2435 disposed on the rod 2432 to limit the range of movement of the rod 2432 relative to the distribution channel 24311.

[0073] The first limiting member 2434 is located between the support column 245 and the distributing body 2431, and the second limiting member 2435 is located on the side of the support column 245 away from the distributing body 2431, used to limit the movement range of the rod 2432. When the rod 2432 moves to the point where the second limiting member 2435 abuts against the support column 245, the distributing hole 24321 aligns with the second channel 24313; when the rod 2432 moves to the point where the first limiting member 2434 abuts against the support column 245, the distributing hole 24321 aligns with the first channel 24312.

[0074] In some embodiments, the ball distributor 243 may include a third limiting member 2436 disposed on the rod 2432, and a reset member 2433 sleeved on the rod 2432. The two ends of the reset member 2433 abut against the third limiting member 2436 and the support column 245, respectively, to keep the rod 2432 in the position where the first limiting member 2434 abuts against the support column 245. At this time, a punch ball 421 has already fallen into the distribution hole 24321 of the rod 2432. When the rod 2432 is pushed by a robotic arm, the rod 2432 moves to the position where the second limiting member 2435 abuts against the support column 245, and the punch ball 421 in the distribution hole 24321 enters the second channel 24313 and then enters the ball outlet pipe 242.

[0075] During the process of loading the punch ball 421 into the second clamp 12, it is difficult to observe with the naked eye whether the punch ball 421 has entered the second clamp 12. In some embodiments, the punch receiving and distributing unit 24 further includes a detection element 244 for detecting whether the punch ball 421 has entered the ball outlet pipe 242. By setting the detection element 244, it is possible to determine whether the punch ball 421 has entered the ball outlet pipe 242. When no punch ball 421 has entered the ball outlet pipe 242, the robotic arm repeatedly operates the lever 2432 until a punch ball 421 enters the ball outlet pipe 242, thereby ensuring the accuracy of subsequent tests.

[0076] In some embodiments, the detection element 244 includes a signal transmitter 2441 and a signal receiver 2442, which are arranged opposite each other on radial sides of the ball outlet pipe 242. The signal transmitter 2441 is used to continuously transmit signals, and the signal receiver 2442 is used to receive signals. Two through holes 2423 are formed oppositely on the pipe wall of the ball outlet pipe 242, and the two through holes 2423 face the signal transmitter 2441 and the signal receiver 2442, respectively. When the punch ball 421 passes through the ball outlet pipe 242, it forms a blockage between the two through holes 2423, and the signal received by the signal receiver 2442 is interrupted, thereby determining that the punch ball 421 has entered the ball outlet pipe 242. In such an embodiment, it is convenient to determine whether the punch ball 421 has entered the ball outlet pipe 242.

[0077] The signal transmitter 2441 and the signal receiver 2442 can be mounted on two support columns 245.

[0078] In some embodiments, there are two ball receivers 241 and two ball outlet channels 242, with each receiving a punch ball 421 of a different outer diameter. The ball distributor 243 has a distributing body 2431 forming two distributing channels 24311 with different inner diameters. The ball distributor 243 includes two rods 2432, each movably disposed within its respective distributing channel 24311. In this embodiment, only one punch receiving and distributing device 24 is required to distribute two different sizes of punch balls 421.

[0079] In some embodiments, the punch receiving and dispensing device 24 may include two support columns 245, the dispensing body 2431 is connected to the two support columns 245, and each rod 2432 passes through one of the support columns 245.

[0080] In some embodiments, both ball outlet pipes 242 are located between the signal transmitter 2441 and the signal receiver 2442, sharing a common detection element 244. The through holes 2423 of the two ball outlet pipes 242, the signal transmitter 2441, and the signal receiver 2442 are all aligned in a straight line. Therefore, when a punch ball 421 falls through its respective through hole 2423 in either of the two ball outlet pipes 242, the signal receiver 2442 can confirm that a punch ball 421 has entered the ball outlet pipe 242.

[0081] In some embodiments, the signal transmitter 2441 and the signal receiver 2442 may be disposed on two support columns 245.

[0082] In some embodiments, the ball outlet pipe 242 includes a main pipe section 2421 and a cover 2422 disposed at the lower end of the main pipe section 2421. When the second clamp 12 is positioned directly below the outlet end of the ball outlet pipe 242 under the action of the horizontal moving member 25, the cover 2422 can block the upper opening of the second clamp 12 to prevent the punch ball 421 from popping out. The inventors of this application have discovered that when the punch ball 421 falls from the main pipe section 2421 into the second clamp 12, it will bounce upward due to the force of the second clamp 12, and may thus pop out of the second clamp 12 to the outside. However, it is difficult to use a robotic arm to grasp the punch ball 421 in the hot chamber. The embodiments of this application, by providing the cover 2422, facilitate the return of the punch ball 421 to the second clamp 12, preventing it from popping out. The cover 2422 may have a gap with the second clamp 12 located directly below the outlet end of the ball outlet pipe 242, so that the second clamp 12 can be moved by the horizontal moving member 25.

[0083] In some embodiments, the body tube segment 2421 may include a first vertical extension segment 24211, an inclined extension segment 24212, and a second vertical extension segment 24213. The first vertical extension segment 24211 is connected to the dispensing body 2431 to facilitate the smooth entry of the punch ball 421 in the second channel 24313 into the first vertical extension segment 24211. The inclined extension segment 24212 connects the first vertical extension segment 24211 and the second vertical extension segment 24213, and a cover 2422 is disposed at the outlet of the second vertical extension segment 24213. The inclined extension segment 24212 facilitates the outward protrusion of the outlet of the ball outlet pipe 242, thereby facilitating the placement of a clamp assembly for receiving the punch ball 421.

[0084] In some embodiments, the small punch test system of this application may further include a clamp assembly 10. Figure 10 yes Figure 3 The exploded view of the punch 42, the circular sample 44, and the fixture assembly 10 is shown; see also Figure 3 and Figure 10 The fixture assembly 10 may include a positioning element 45, which is disposed in the first fixture 11 and the second fixture 12 for positioning the circular sample 44 and the punch 42.

[0085] See Figure 4 In some embodiments, the loading device further includes: a positioning member holding part 28 for holding the positioning member 45; and a feeding part 23 for placing the positioning member 45 into the second clamp 12 in the second clamp storage part 29.

[0086] In some embodiments, the positioning member retaining portion 28 includes a plurality of positioning member retaining grooves, and the lower part of the positioning member 45 is placed in the positioning member retaining grooves so that the clamping member 234 can clamp the positioning member 45. The positioning member retaining grooves and the positioning member 45 can be clearance fit so that the positioning member 45 can be substantially upright so that the clamping member 234 can clamp the positioning member 45.

[0087] See Figure 9 In some embodiments, the feeding part 23 further includes a positioning clamping member 235 for clamping the positioning member 45 from the positioning member holding part 28 to place the positioning member 45 in the second clamp 12. The positioning clamping member 235 is disposed directly below the punch clamping member 234. Since the size of the positioning member 45 is larger than the size of the punch 42, disposing the positioning clamping member 235 directly below the punch clamping member 234 does not affect the clamping and releasing of the punch 42 by the punch clamping member 234, and allows the punch clamping member 234 and the positioning clamping member 235 to be aligned with the flat-head punch 420 and the positioning member 45 respectively by rotating the rotating member 232.

[0088] See Figure 4 In some embodiments, the sample receiving and dispensing unit 21 has a single sample receiving slot 2121, the punch holding slot of the punch holding unit 27 has a punch holding slot, and the positioning member holding slot of the positioning member holding unit 28 has a positioning member holding slot on a straight line parallel to the movement trajectory of the horizontal moving member 25; the horizontal moving member 25 is also used to drive the feeding unit 23 to move so that the sample picking and placing member 231, the punch holding member 234, and the positioning member holding member 235 can be aligned with the single sample receiving slot 2121, the punch holding slot, and the positioning member holding slot, respectively.

[0089] The embodiments of this application utilize the horizontal moving member 25 to drive the second clamp storage section 29 and the loading section 23 to move horizontally, enabling the second clamp 12 to receive the falling punch ball 421, and enabling the loading section 23 to acquire the flat-head punch 420, the positioning member 45, and a distributed circular sample 44. Thus, the loading section 23 places the flat-head punch 420, the positioning member 45, and the circular sample 44 into the second clamp 12, making the assembly operation of the circular sample 44, the punch ball 421, the flat-head punch 420, and the clamp assembly 10 easier in the hot chamber.

[0090] In some embodiments, the small punch test system may further include a test platform 202. Besides the test device 30, other structures of the small punch test system may be mounted on the test platform 202. The test platform 202 is provided with a horizontal slide rail 26 extending in a preset direction, and the horizontal moving member 25 can move along the horizontal slide rail 26.

[0091] See Figure 9The horizontal moving member 25 may include a base plate 251 and a vertical plate 252 connected to the base plate 251. A second clamp storage part 29 is disposed on the base plate 251, and a lifting slide rail 2521 is provided on the vertical plate 252. The loading part 23 is movably disposed on the lifting slide rail 2521, thereby enabling it to move up and down relative to the vertical plate 252. In the embodiments of this application, by setting the base plate 251 and the vertical plate 252, the second clamp storage part 29 and the loading part 23 are respectively disposed on the base plate 251 and the vertical plate 252, and can be driven by the horizontal moving member 25 to move together.

[0092] Specifically, the lifting component 233 of the loading section 23 is movably mounted on the lifting slide rail 2521, thereby enabling it to move up and down relative to the vertical plate 252.

[0093] See Figure 3 and Figure 10 In some embodiments, the first clamp 11 and the second clamp 12 form a receiving cavity, and the positioning member 45 is disposed in the receiving cavity and pressed onto the circular sample 44. The flat-head punch 420 includes a rod body 4201 and a rod end 4202 connected to the rod body 4201. The size of the rod end 4202 is smaller than that of the rod body 4201, and the size of the rod end 4202 is substantially the same as that of the punch ball 421.

[0094] The positioning element 45 forms a positioning channel 451, through which the punch ball 421 and the flat-head punch 420 enter and contact the circular sample 44. The positioning channel 451 includes a first groove 4511 away from the circular sample 44, a second groove 4512 facing the circular sample 44, and a guide groove 4513 connecting the first groove 4511 and the second groove 4512. The inner diameter of the first groove 4511 is larger than the inner diameter of the second groove 4512. The guide groove 4513 facilitates the entry of the rod end 4202 of the flat-head punch 420 and the punch ball 421 into the second groove 4512.

[0095] When the first clamp 11 and the second clamp 12 are tightened, the positioning member 45 will press the circular sample 44; at the same time, since the rod end 4202 of the flat-head punch 420 and the punch ball 421 are too small, the positioning member 45 is set to facilitate the loading of the flat-head punch 420 and the punch ball 421 by the punch clamp 234 and the ball outlet pipe 242 respectively.

[0096] The top of the positioning channel 451 can be formed into a funnel-shaped hole to facilitate the entry of the circular sample 44, the flat-head punch 420, and the punch ball 421 into the positioning channel 451.

[0097] In some embodiments, the first clamp 11 includes a first cover 113 and a first ring 114 connected to the first cover 113, the first ring 114 forming a first receiving groove 1141; the first cover 113 forms a first channel 1131 communicating with the first receiving groove 1141 for the punch 42 to extend out of the receiving cavity.

[0098] In some embodiments, the second clamp 12 includes a second cover 121, a second ring 122 connected to the second cover 121, and a third ring 123 connected to the second ring 122. The second ring 122 forms a second receiving groove 1221; the second cover 121 forms a second channel communicating with the second receiving groove 1221; and the third ring 123 is used to connect with a first ring 114, thereby assembling the first clamp 11 and the second clamp 12. The second channel includes a guide hole section 1214, a sample groove 1211, and a first measuring groove 1212 connected in sequence. The inner diameter of the sample groove 1211 is larger than the inner diameter of the first measuring groove 1212, and the outer diameter of the disc sample 44 is larger than the inner diameter of the first measuring groove 1212 but smaller than the inner diameter of the sample groove 1211. The disc sample 44 is disposed in the sample groove 1211.

[0099] In some embodiments, the first clamp 11 and the second clamp 12 are threaded together. In some embodiments, the radial outer surface of the first ring 114 is threaded, and the radial inner surface of the third ring 123 is threaded. The inner diameter of the third ring 123 is larger than the inner diameter of the second ring 122.

[0100] In some embodiments, the positioning member 45 includes a positioning body 452 and a positioning protrusion 453, the positioning protrusion 453 entering the second hole section and abutting against the disc sample 44. The shape of the positioning protrusion 453 matches the guide hole section 1214 so as to enter the guide hole section 1214 and abut against the disc sample 44.

[0101] See Figure 1 In some embodiments, the testing system further includes an excess sample collector 201 for collecting excess disc samples 44 scraped off from the loading section 23 by a robotic arm. Sometimes, more than one disc sample 44 may enter the single sample receiving slot 2121, for example, two. When picking up the disc sample 44 using the sample pick-and-place member 231, the member may pick up two disc samples 44 simultaneously. In this case, the horizontal moving member 25 can be used to move the sample pick-and-place member 231 directly above the excess sample collector 201, and the robotic arm can scrape off the excess sample. The scraped-off excess disc sample 44 enters the excess sample collector 201. The excess sample collector 201 is movably configured to be removed by the robotic arm.

[0102] See Figure 1 and Figure 4In some embodiments, the testing system further includes a separator 50 for separating the punch ball 421 and the disc sample 44 from the second clamp 12 after the test. In some cases, after the test, the disc sample 44 deforms and becomes stuck in the sample groove 1211 of the second clamp 12 along with the punch ball 421, making it difficult to remove. In this case, the separator 50 can be used to separate the punch ball 421 and the disc sample 44 from the second clamp 12.

[0103] In some embodiments, the separator 50 includes a disc 51 and a push rod 52 disposed in the disc 51. After the test, the second cover 121 of the second clamp 12 is placed on the disc 51 by a robot arm, and the second clamp 12 is pressed down. The push rod 52 passes through the first measuring groove 1212 and pushes the disc sample 44 and the punch ball 421 out of the sample groove 1211 of the second clamp 12.

[0104] See Figure 1 and Figure 4 In some embodiments, the test system further includes a recovery unit 60, which is movably disposed on the test platform 202, and the punch ball 421, disc sample 44, etc. after the test can be put into the recovery unit 60 for recovery.

[0105] In some embodiments, the testing device 30 is disposed on the tensile testing machine 41, see [reference]. Figure 2 The tensile testing machine 41 includes a base 411, a guide member 412 disposed on the base 411, and a force-applying rod 413 disposed on the guide member 412. See also... Figure 2 and Figure 14 The testing device 30 includes a mounting component 31, a deformation measuring component 32, and a force applying component 33. A clamp assembly 10 is mounted on the mounting component 31. The mounting component 31 is disposed on a base 411. The force applying component 33 is connected to a force applying rod 413 and is used to apply a force to the punch 42. The deformation measuring component 32 is used to measure the deformation of the circular sample 44 under the applied force. The testing device 30 of this embodiment, in cooperation with a tensile testing machine 41, can apply a force to the punch 42 through the connection of the force applying component 33 and the force applying rod 413, and use the deformation measuring component 32 to measure the deformation of the circular sample 44 under the applied force, thereby performing a small punch test on a radioactive sample.

[0106] Figure 13 yes Figure 2 A partial structural schematic diagram of the testing device 30; Figure 14 yes Figure 13 Another structural schematic diagram of the testing device 30 from another angle, as shown below. Figure 13 and Figure 14 As shown, the testing device 30 also includes a temperature measuring element 34 disposed on the mounting element 31. The temperature measuring element 34 is used to measure the temperature of the fixture assembly 10.

[0107] like Figure 3 and Figure 10 As shown, in some embodiments, a second measuring groove 1213 is formed on the side of the second clamp 12 away from the first clamp 11. A temperature measuring element 34 is used to enter the second measuring groove 1213 to measure the temperature of the second clamp 12. The second measuring groove 1213 may be, for example, an annular groove.

[0108] In some embodiments, the testing apparatus 30 further includes a cooling element 35 for cooling the fixture assembly 10 to test the disc sample 44 at a temperature below room temperature. The embodiments of this application, by providing the cooling element 35, enable testing of the disc sample 44 in a low-temperature environment.

[0109] In some embodiments, the cooling component 35 includes a cooling base shell 351 and a cooling cover shell 352. The cooling base shell 351 is detachably connected to the mounting component 31; the cooling cover shell 352 is configured to be able to move up and down and rotate relative to the mounting component 31, thereby being able to be fitted onto the force-applying component 33 and the cooling base shell 351 to form a receiving cavity for containing the cooling medium, and to be separated from the force-applying component 33. The embodiments of this application, by configuring the cooling component 35 to include a cooling base shell 351 detachably connected to the mounting component 31 and a cooling cover shell 352 capable of moving up and down and rotating, allow the cooling cover shell 352 to be fitted onto the force-applying component 33 and the cooling base shell 351 to form a receiving cavity for containing the cooling medium, thereby creating a low-temperature environment for testing the disc sample 44 using the low-temperature medium, and also allow the cooling cover shell 352 to be lifted off the force-applying component 33, thus not affecting testing the disc sample 44 in other temperature ranges.

[0110] In some embodiments, the cooling housing 352 is provided with a top through hole 3522 for the force-applying member 33 to pass through.

[0111] The testing device 30 may also include a cooling rotating component 37 and a cooling lifting component 38. The cooling rotating component 37 is used to drive the cooling cover 352 to rotate relative to the mounting component 31, so that the cooling cover 352 can rotate to a position coaxial with the force-applying component 33, or rotate to a position offset from the force-applying component 33. The cooling lifting component 38 is used to drive the cooling cover 352 to move up and down relative to the mounting component 31, so that when the cooling cover 352 is coaxial with the force-applying component 33, the cooling cover 352 can be lowered to engage with the cooling bottom shell 351 or raised to a preset height through the up and down movement.

[0112] When the cooling cover 352 and the force-applying member 33 are coaxial, the force-applying member 33 can pass through or move out of the top through hole 3522 of the cooling cover 352 by the movement of the force-applying rod 413 relative to the guide member 412.

[0113] The cooling component 35 also includes a cooling medium delivery line for delivering the cooling medium into the receiving cavity. In some embodiments, the cooling medium may be liquid nitrogen.

[0114] In some embodiments, the mounting member 31 may include a first mounting member 311 and a second mounting member 312. The first mounting member 311 is connected to the base 411, and the second mounting member 312 is detachably connected to the first mounting member 311. The second mounting member 312 may be plugged into or threaded into the first mounting member 311.

[0115] The first mounting component 311 may include a mounting body 3111, with a mounting groove 3112 formed on the top of the mounting body 3111. The assembled clamp assembly 10 is arranged in the mounting groove 3112. The deformation measuring component 32 and the temperature measuring component 34 extend from the bottom wall of the mounting groove 3112, respectively.

[0116] The first mounting component 311 may further include a support portion 3113, with the cooling base shell 351 sleeved on the mounting body 3111 and cooperating with the support portion 3113, which supports the cooling base shell 351. The support portion 3113 may be a protrusion that protrudes radially from the mounting body 3111.

[0117] In some embodiments, the cooling housing 352 is provided with an overflow hole 3521 for the cooling medium in the cooling component 35 to overflow. The cooling component 35 includes a collection tray 353, which is detachably disposed on the mounting member 31 and located below the cooling bottom shell 351, for collecting overflowing liquid nitrogen.

[0118] The collection tray 353 can be externally piped to guide excess liquid nitrogen to the ground. In some embodiments, a heat dissipation structure is formed on the lower surface of the collection tray 353 to allow the liquid nitrogen to evaporate as quickly as possible. The heat dissipation structure can be, for example, multiple annular ribs protruding downwards from the lower surface of the collection tray 353.

[0119] In some embodiments, the first mounting member 311 further includes a connecting portion 3114 disposed at the bottom of the mounting body 3111, and the first mounting member 311 is connected to the second mounting member 312 through the connecting portion 3114. The outer diameter of the connecting portion 3114 is smaller than that of the mounting body 3111, so that a boss is formed at the top end face of the second mounting member 312. The collecting tray 353 mates with the top end face of the second mounting member 312, and is supported by the top end face of the second mounting member 312. The collecting tray 353 may have a through hole for the connecting portion 3114 to pass through. During assembly, the collecting tray 353 can be first disposed on the top end face of the second mounting member 312, and then the connecting portion 3114 of the first mounting member 311 can be inserted into the through hole of the collecting tray 353 and connected to the second mounting member 312.

[0120] In some embodiments, the testing apparatus 30 further includes a heating element for heating the fixture assembly 10 to test the disc sample 44 at a temperature above room temperature. The embodiments of this application, by incorporating a heating element, enable testing of the disc sample 44 in a high-temperature environment.

[0121] In some embodiments, the heating element includes two opposing heating halves 36, which are hinged together to allow the relative position of the two heating halves 36 to switch between an open and closed state. When the relative position of the two heating halves 36 is closed, they can enclose the clamp assembly 10. When the relative position of the two heating halves 36 is open, the cooling element 35 can enter between the two heating halves 36 to cool the clamp assembly 10. By configuring the heating element to include two hinged heating halves 36, the embodiments of this application can achieve both a closed state (enclosing the clamp assembly 10 by rotating the two heating halves 36 towards each other) for testing the disc sample 44 in a high-temperature environment and an open state (moving away from the force-applying element 33 by rotating the two heating halves 36 in opposite directions) for testing the disc sample 44 in other temperature ranges without affecting testing the disc sample 44.

[0122] The heating half 36 can form a heating groove 361. When the two heating half 36 are closed, the two heating grooves 361 together form a heating cavity. A first through hole is formed at the top of the heating cavity for the force-applying component 33 to pass through. A second through hole is formed at the bottom of the heating cavity for the mounting component 31 to pass through.

[0123] When the fixture assembly 10 is heated using the heating element, the cooling cover 352 can be raised to a preset height and then rotated by a preset angle to offset the cooling cover 352 from the force-applying element 33. The cooling bottom shell 351 and the collection tray 353 are then removed from the mounting part 31. After that, the two heating halves 36 are closed, and the force-applying element 33 is passed through the first through hole of the heating element.

[0124] Since the deformation measuring element 32 and the temperature measuring element 34 are arranged on the mounting member 31, the first mounting member 311 and the second mounting member 312 are provided with channels for arranging the deformation measuring element 32 and the temperature measuring element 34. In order to reduce the high temperature of the deformation measuring element 32 and the temperature measuring element 34 when the heating element heats the fixture assembly 10, a heat dissipation hole 3121 communicating with the aforementioned channel can be opened on the second mounting member 312 for heat dissipation.

[0125] During the small punch test, the force-applying component 33 drives the punch 42 to punch the circular sample 44 at a certain speed. The sensor of the tensile testing machine 41 and the deformation measuring component 32 record the punch load and the sample deformation, respectively, so as to analyze and obtain various mechanical property parameters of the material.

[0126] Regarding the embodiments of this application, it should also be noted that, without conflict, the embodiments of this application and the features in the embodiments can be combined with each other to obtain new embodiments.

[0127] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. The scope of protection of this application shall be determined by the scope of the claims.

Claims

1. A clamping device for a small punch test system, the small punch test system being used to hold a punch and a disc sample together using a threaded first clamp and a second clamp, and to apply a force to the disc sample using the punch to perform a small punch test on the disc sample; The device is used to tighten the first clamp and the second clamp, characterized in that... The device includes: A first clamp holding part is used to hold the first clamp; The second clamp holding part is used to hold the second clamp; A rotating component is used to drive the second clamp holding part to rotate around the rotation axis, thereby driving the second clamp to rotate; A connecting assembly for connecting the second clamp holding part and the rotating member, the connecting assembly being configured such that the second clamp holding part can deviate from the rotation axis to facilitate the second clamp establishing a threaded connection with the first clamp during rotation.

2. The apparatus of claim 1, wherein, The connection component includes: Multiple fasteners are provided for connecting the rotating member and the second clamp holding part, and the multiple fasteners are spaced apart around the rotation axis; An elastic element is disposed between the rotating element and the second clamp holding part to provide a force to the second clamp holding part that deviates from the rotation axis.

3. The apparatus of claim 2, wherein, The elastic element is a spring sleeved on the fastener.

4. The apparatus of claim 1, wherein, Also includes: A movable component is used to drive the rotating component and the second clamp holding part to move in a direction closer to the first clamp holding part, so that the second clamp can contact the first clamp.

5. The apparatus of claim 1, wherein, The second clamp holding part is provided with a holding groove, and the holding groove has a cross-section; The cross-section of the second clamp matches the retaining groove so that the second clamp can enter the retaining groove; The cut surface is used to ensure that the second clamp remains relatively stationary with respect to the retaining groove in the circumferential direction after the second clamp enters the retaining groove.

6. The apparatus of claim 3, wherein, The first clamp holding part includes a first holding member, and the first clamp includes a first holding engagement member. Through the engagement of the first holding member and the first holding engagement member, the first clamp can be held by the first clamp holding part.

7. The apparatus of claim 6, wherein, The first clamp holding part includes a first positioning member; the first clamp includes a first positioning engagement member, and through the engagement of the first positioning member and the first positioning engagement member, the first clamp can remain relatively stationary with respect to the second clamp holding part in the circumferential direction.

8. The apparatus according to claim 6, characterized in that, The first retaining member consists of two oppositely arranged bosses; The first retaining mating component consists of two sliding grooves arranged in opposite directions.

9. The apparatus of claim 7, wherein, The first positioning component is a positioning pin; The first positioning component is a positioning groove that is off-axis.

10. A small punch test system for applying force to a radioactive disc sample using a punch to perform a small punch test on the disc sample, characterized in that, The test system includes: The clamping assembly includes a threaded first clamp and a second clamp for holding the disc sample and the punch; A loading device is used to place the circular sample and the punch into the second fixture; The clamping device according to any one of claims 1-9 is used to tighten the first clamp and the second clamp after the disc sample and the punch are placed into the second clamp using the loading device; A testing device is used to apply a force to the punch in the assembled fixture assembly and to measure the amount of deformation of the circular sample under the action of the force.

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