In-situ dynamic mechanical testing device for sample detection

Abstract

The utility model relates to the technical field of material mechanical property testing equipment, in particular to an in-situ dynamic mechanical testing device for sample detection, which comprises a base, a vacuum environment box is arranged on the base, a heating core is fixed in the vacuum environment box, and an observation window, a sealing structure and a heating structure are arranged on the vacuum environment box. Two stretching rods are arranged on the vacuum environment box in a sliding mode and symmetrically arranged on the two sides of the heating core, one end of each stretching rod is located outside the vacuum environment box, the other end of each stretching rod stretches into the vacuum environment box, a clamping structure is arranged at one end of each stretching rod, and a synchronous driving assembly is arranged on the base. The synchronous driving assembly drives the two stretching rods to synchronously provide tensile force for the sample stretching section, so that it is ensured that the sample gauge length section is always in situ, and the purpose of conducting in-situ dynamic mechanical testing on the sample in the vacuum high-temperature environment can be achieved in cooperation with the sealing structure and the heating structure.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of material mechanical property testing equipment, in particular to a kind of in-situ dynamic mechanical testing device for sample detection. BACKGROUND

[0002] Material mechanical properties mainly refer to the macroscopic properties of materials, such as elastic properties, plastic properties, hardness, impact resistance, etc. The mechanical properties of various engineering materials are measured by corresponding test equipment and instruments according to the methods and procedures specified in relevant standards.

[0003] As shown in Figure 1 The present application relates to the technical field of material mechanical property testing equipment, in particular to a kind of in-situ dynamic mechanical testing device for sample detection.

[0004] For the above-mentioned sample 40, the existing method is to use a tensile testing machine to test, that is, one end of the sample 40 is fixed on the fixed chuck of the tensile testing machine, and then the other end of the sample 40 is subjected to a tensile force through the movable chuck, so that the length change of the gauge section 402 of the sample 40 is observed, and the mechanical properties of the material can be judged accordingly. However, although the above-mentioned method can realize the load loading test of the sample 40, since it uses the single-sided pulling method, the gauge section 402 of the sample 40 will gradually move during the load loading process, which is not conducive to the observation of the experimenters and is inconvenient to use.

[0005] Therefore, there is an urgent need for a device that can perform in-situ dynamic mechanical testing of the sample 40 through load loading test in a vacuum high-temperature environment. CONTENT OF THE INVENTION

[0006] In order to achieve the purpose of in-situ dynamic mechanical testing of the sample in a vacuum high-temperature environment, the present application provides an in-situ dynamic mechanical testing device for sample detection.

[0007] The in-situ dynamic mechanical testing device for sample detection provided by the present application adopts the following technical solution:

[0008] The utility model provides a kind of in-situ dynamic mechanical testing device for sample detection, including base, vacuum environment box is provided on the base, heating core for locating sample gauge length section is fixed in the vacuum environment box, observation window for observing the test condition of sample gauge length section on heating core is provided on the vacuum environment box, tensile rod is slidably arranged on the vacuum environment box, the tensile rod is provided with two, and two The tensile rod is symmetrically arranged on the two sides of heating core, one end of the tensile rod is located outside the vacuum environment box, the other end of the tensile rod is located in the side of heating core in the vacuum environment box, the one end of the tensile rod in the vacuum environment box is provided with clamping structure for clamping and fixing the tensile section of sample, the vacuum environment box is provided with sealing structure for sealing the connecting gap between tensile rod and vacuum environment box side wall and heating structure for heating heating core, the base is provided with synchronous driving assembly for driving two tensile rods to slide synchronously in reverse.

[0009] By adopting the above technical scheme, when in use, the sample is placed in the vacuum environment box, and the tensile sections corresponding to the sides of the sample are clamped and fixed by the clamping structure, then the vacuum high-temperature environment in the vacuum environment box is ensured by the cooperation of the sealing structure and the heating structure, and subsequently the two tensile rods are driven to move synchronously in reverse by the synchronous driving assembly, so that the tensile sections at both ends are stretched synchronously by the tensile rods, and in the stretching process, the gauge length section of the sample is always in situ, then the device as a whole can be placed below the optical microscope, and the lens of the optical microscope is aligned with the observation window, so that the changes of the gauge length section of the sample can be observed in real time by the optical microscope through the observation window, thereby achieving the purpose of in-situ dynamic mechanical testing of the sample in the vacuum high-temperature environment, and the whole device is simple and convenient to use.

[0010] Preferably, the vacuum environment box includes a box body detachably connected to the base, and a box cover buckled on the box body, a first sealing ring is arranged between the box body and the box cover, the heating core, the clamping structure, the heating structure and the sealing structure are all arranged on the box body, and the observation window is detachably connected to the box cover.

[0011] By adopting the above technical scheme, when in use, the box cover and the box body are arranged to facilitate the replacement of the sample by the experimental personnel, and the sealing property of the vacuum environment box after the box cover is buckled is ensured by the first sealing ring.

[0012] Preferably, the observation window includes a test mirror placed on the box cover, and a clamping block for clamping and fixing the test mirror on the box cover, a first observation opening is formed through the box cover, the test mirror is blocked at the first observation opening, a second sealing ring is arranged between the test mirror and the box cover, the clamping block is detachably connected to the box cover, a second observation opening is formed in the clamping block, and the second observation opening, the test mirror and the first observation opening are arranged in position correspondence.

[0013] By adopting the above technical solution, when in use, the trial mirror is fixed to the box cover by the clamping block, and an observation window can be formed by cooperating with the first observation port and the second observation port. The connection gap between the trial mirror and the box cover is then ensured by the second sealing ring, thereby ensuring the sealing of the vacuum environment box. This makes it convenient for experimenters to observe the sample while ensuring that the vacuum environment is maintained in the vacuum environment box.

[0014] Preferably, the clamping structure includes an abutment block and a pressure plate fixed at the end of the stretching rod, and the end of the stretching rod extending into the vacuum environment chamber is provided with a groove for placing the stretching section of the sample, the abutment block is fixed to the bottom wall of the groove, and the abutment block abuts and cooperates with the upper arc surface of the sample, one end of the pressure plate is fixed on the stretching rod, and the other end of the pressure plate abuts and cooperates with the side wall of the stretching section of the sample.

[0015] By adopting the above technical solution, when in use, the sample is placed on the heating core, and the stretching section of the sample is embedded in the groove, and then the sample is pressed against the stretching rod by the pressure plate. When the stretching rod moves, the sample is stretched by the abutment block against the arc surface on the sample. The pressure plate prevents one end of the sample from tilting up during the stretching process, thereby ensuring the stability of the sample during the dynamic mechanical test of the sample.

[0016] Preferably, the sealing structure includes a bellows sleeve mounted on the stretching rod, and a third sealing ring arranged between the end of the bellows sleeve and the side wall of the vacuum environment box, one end of the bellows sleeve is fixed to the side wall of the stretching rod, and the other end of the bellows sleeve is fixed to the outer wall of the vacuum environment box.

[0017] By adopting the above technical solution, when in use, the connection gap between the stretching rod and the vacuum environment chamber is sealed by the setting of the third sealing ring and the corrugated sleeve. When the stretching rod moves, the normal movement of the stretching rod is ensured by the deformation of the corrugated sleeve itself, thereby ensuring that the vacuum environment chamber is always in a vacuum environment while ensuring that the sample is stretched.

[0018] Preferably, the heating structure includes a heating wire fixed on the outer wall of the heating core, and a terminal and a thermocouple fixed on the vacuum environment box, the terminal is used to electrically connect the heating wire to the external circuit, and the thermocouple is used to monitor the temperature of the heating core in real time.

[0019] By adopting the above technical solution, when in use, the heating wire is connected to the external circuit through the terminal, so that by energizing the heating wire, the heating wire heats the heating core, and then cooperates with the thermocouple to monitor the temperature of the heating core in real time to ensure that the temperature of the heating core is maintained within the specified temperature range, thereby providing a high-temperature environment for the vacuum environment chamber.

[0020] Preferably, the vacuum environment box is further provided with heat insulation covers, the heat insulation covers are provided in groups, the heat insulation covers are in sleeved cooperation, the heating core is fixed in the innermost heat insulation cover, heat insulation plates are fixed on the heat insulation covers and used for blocking the heating core in the heat insulation covers, the heat insulation plates are also provided in groups and correspond to the heat insulation covers one by one.

[0021] By using the above technical scheme, when in use, the cooperation of the groups of heat insulation covers and heat insulation plates can ensure that the high-temperature environment in the vacuum environment box is maintained within a certain range and reduce the heat dissipation of the heating core, which is beneficial to the detection process of the sample.

[0022] Preferably, the synchronous driving assembly comprises two sliding seats oppositely arranged on the base, a bidirectional screw rod rotating on the base, a driving pulley and a driven pulley rotating on the base, a synchronous belt wound between the driving pulley and the driven pulley, and a driving motor fixed on the base, the two sliding seats are threadedly connected with the sides of the bidirectional screw rod in opposite screw directions, the driven pulley is coaxially fixedly connected with one end of the bidirectional screw rod, the driving pulley is coaxially fixedly connected with the output shaft of the driving motor, the synchronous belt is in transmission cooperation with the driving pulley and the driven pulley, the base is provided with a clamping structure for clamping and fixing the stretching rod and the sliding seat together and a pressing assembly for pressing the synchronous belt on the driving pulley and the driven pulley.

[0023] By using the above technical scheme, when the sample is installed in the vacuum environment box, the vacuum environment box can be fixed on the base, the stretching rod can be clamped and fixed on the sliding seat through the clamping structure, then the driving motor drives the driving pulley to rotate, under the action of the synchronous belt, the driving pulley drives the transmission pulley to rotate, thereby driving the bidirectional screw rod to rotate, and the purpose of driving the two sliding seats to slide in opposite directions is achieved, so that the stretching of the stretching rod can be achieved.

[0024] Preferably, the clamping structure comprises a clamping block fixed on one of the sliding seats, a first locking nut arranged on the clamping block, and a second locking nut arranged on the other sliding seat, one end of the stretching rod is arranged in one sliding seat and threadedly cooperates with the second locking nut, the other end of the stretching rod is arranged in the clamping block and threadedly cooperates with the first locking nut, the first locking nut abuts against the clamping block, and the second locking nut abuts against the sidewall of the corresponding sliding seat.

[0025] By adopting the technical scheme, during use, the vacuum environment box is placed on the base, the two stretching rods are respectively inserted on the sliding seat and the clamping block, and the stretching rods are locked by screwing the first locking nut and the second locking nut, so that the connection between the stretching rods and the sliding seat is achieved, and the installation process is simple and convenient.

[0026] Preferably, the pressing assembly comprises a fixed block fixedly connected to the base, a sliding block slidingly arranged on the base, an adjusting bolt arranged between the fixed block and the sliding block, and an abutting wheel rotating on the sliding block, the adjusting bolt is rotationally connected to the fixed block, one end of the adjusting bolt is threadedly connected to the sliding block after penetrating through the fixed block, and the outer wall of the abutting wheel abuts with the outer side of the synchronous belt.

[0027] By adopting the technical scheme, during use, the sliding block is driven to slide by screwing the adjusting bolt, so that the position of the abutting wheel is adjusted, the outer wall of the abutting wheel abuts on the synchronous belt, until the synchronous belt is pressed on the driving pulley and the driven pulley by the abutting wheel, so as to ensure the transmission accuracy between the driving pulley, the driven pulley and the synchronous belt.

[0028] In summary, the present application has at least one of the following beneficial technical effects:

[0029] 1. The vacuum environment box provides a vacuum high-temperature environment, and the synchronous driving assembly drives the two stretching rods to synchronously stretch the two ends of the sample in opposite directions, so that the gauge length section of the sample is always in place during stretching, and then the optical microscope is aligned with the observation window, so that the optical microscope can observe the changes of the gauge length section of the sample in real time through the observation window, thereby achieving the purpose of in-situ dynamic mechanical testing of the sample in a vacuum high-temperature environment, and the whole process is simple and convenient to use;

[0030] 2. By cooperating the corrugated sleeve and the third sealing ring, the vacuum environment in the vacuum environment box is ensured on the premise that the stretching rod normally pulls the sample;

[0031] 3. By cooperating the heat shield and the heat insulation plate, the heat dissipation of the heating core is reduced, which is conducive to maintaining the high-temperature environment in the vacuum environment box. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a perspective view mainly showing the structure of the sample in the background art;

[0033] Figure 2 is a perspective view mainly showing the overall structure in the embodiment of the present application;

[0034] Figure 3 is an exploded view mainly showing the structure of the vacuum environment box in the embodiment of the present application;

[0035] Figure 4 is the sectional view of the vacuum environment box structure mainly embodied in the embodiment of the application;

[0036] Figure 5 is the axial schematic view of the stretching rod structure mainly embodied in the embodiment of the application;

[0037] Figure 6 is the axial schematic view of the clamping structure mainly embodied in the embodiment of the application;

[0038] Figure 7 is the exploded view of the sealing structure mainly embodied in the embodiment of the application;

[0039] Figure 8 is the exploded view of the box cover structure mainly embodied in the embodiment of the application;

[0040] Figure 9 is the axial schematic view of the base structure mainly embodied in the embodiment of the application;

[0041] Figure 10 is the axial schematic view of the synchronous driving assembly structure mainly embodied in the embodiment of the application;

[0042] Figure 11 is the sectional view of the pressing assembly structure mainly embodied in the embodiment of the application;

[0043] Figure 12 is the axial schematic view of the clamping structure mainly embodied in the embodiment of the application.

[0044] The drawing label: 1, base; 11, environment box buffer seat; 12, positioning column; 13, buffer spring; 14, scale bar; 2, vacuum environment box; 21, box body; 211, first observation port; 212, gas pipe joint; 22, box cover; 23, first sealing ring; 3, heating core; 4, observation window; 41, test mirror; 42, clamping block; 421, second observation port; 43, second sealing ring; 5, stretching rod; 51, type groove; 6, clamping structure; 61, abutment block; 62, pressing plate; 7, sealing structure; 71, corrugated sleeve; 72, third sealing ring; 8, heating structure; 81, heating wire; 82, wiring post; 83, thermocouple; 9, synchronous driving assembly; 91, sliding seat; 92, bidirectional screw rod; 93, driving pulley; 94, driven pulley; 95, synchronous belt; 96, driving motor; 10, heat shield; 101, heat shield plate; 20, clamping structure; 201, clamping block; 202, first locking nut; 203, second locking nut; 30, pressing assembly; 301, fixed block; 302, sliding block; 303, adjusting bolt; 304, abutment wheel; 40, test sample; 401, stretching section; 402, gauge section; 403, circular arc surface. DETAILED DESCRIPTION

[0045] The application will be further described below in conjunction with the accompanying drawings. Figure 2 - the accompanying drawings Figure 12 The application will be further described below in conjunction with the accompanying drawings.

[0046] The application discloses a sample detection in-situ dynamic mechanical testing device.

[0047] Referring to Figure 2 and Figure 3 A sample detection in-situ dynamic mechanical testing device comprises a base 1 horizontally placed, and a vacuum environment box 2 detachably connected to the base 1, wherein the vacuum environment box 2 comprises a box body 21 and a box cover 22, the box body 21 is located above the base 1, the box cover 22 is buckled at the top opening of the box body 21 and detachably connected to the box body 21 through bolts, a first sealing ring 23 is arranged between the box body 21 and the box cover 22, the first sealing ring 23 is used for sealing the connecting gap between the box body 21 and the box cover 22, and an air pipe joint 212 is formed on the box body 21.

[0048] Referring to Figure 2 and Figure 3 When the box cover 22 is buckled on the box body 21, the sealing property of the box body 21 is ensured through the first sealing ring 23, the vacuum environment box 2 is connected with the air pipe joint 212, and the vacuum environment box 2 is operated through the vacuumizing equipment, so that the box body 21 is in a vacuum environment.

[0049] Referring to Figure 3 and Figure 4 In addition, an environment box buffer seat 11 is arranged below the base 1, the environment box buffer seat 11 is fixed on the base 1 through bolts, a plurality of positioning columns 12 are slidingly inserted on the environment box buffer seat 11, the top ends of the positioning columns 12 are inserted into the base 1 in a plug-in mode, a buffer spring 13 is sleeved on the positioning column 12, one end of the buffer spring 13 is abutted against the base 1, the other end of the buffer spring 13 is abutted against the bottom wall of the box body 21, a locking bolt 14 is arranged on the positioning column 12, the bottom end of the locking bolt 14 is abutted against the bottom end of the positioning column 12, and the top end of the locking bolt 14 is threadedly connected to the box body 21 after penetrating through the positioning column 12; in use, the buffer spring 13 and the positioning column 12 are used in cooperation to provide a buffer force for the vacuum environment box 2 when the vacuum environment box 2 is moved, so as to ensure the installation stability of the vacuum environment box 2.

[0050] Referring to Figure 3 and Figure 4The box body 21 is internally connected with a plurality of groups of heat insulation covers 10 through bolt fixing, the plurality of groups of heat insulation covers 10 are nested together, the top end of each group of heat insulation covers 10 is correspondingly provided with a heat insulation plate 101, the heat insulation plate 101 is fixed on the heat insulation cover 10 through bolt fixing, when the heat insulation plate 101 is fixed on the heat insulation cover 10, the outer heat insulation plate 101 blocks the inner heat insulation cover 10 and the heat insulation plate 101 in the outer heat insulation cover 10, the innermost heat insulation cover 10 is internally fixed with a heating core 3, the heating core 3 is made of a material with good heat conduction performance, and in the embodiment, the heating core 3 is preferably made of boron nitride.

[0051] With reference to Figure 3 and Figure 4 The top end of the heating core 3 is formed with a bearing groove for bearing and positioning the gauge length section 402 of the sample 40, a heating structure 8 is arranged in the box body 21, the heating structure 8 is used for heating the heating core 3, and in cooperation with the arrangement of the heat insulation cover 10 and the heat insulation plate 101, the high-temperature environment in the box body 21 can be ensured, the heat insulation plate 101 is provided with an avoiding hole, and the avoiding hole is arranged in alignment with the gauge length section 402 of the sample 40; in use, the box cover 22 is opened, then the sample 40 is placed on the heating core 3, the gauge length section 402 of the sample 40 is positioned through the bearing groove, then the box cover 22 is buckled and the box body 21 is subjected to vacuumizing treatment, finally the heating structure 8 is controlled to heat the heating core 3, under the heat conduction action of the heating core 3, the sample 40 can be ensured to be in the vacuum high-temperature environment.

[0052] With reference to Figure 4 and Figure 5 The heating structure 8 is composed of a heating wire 81, a terminal post 82 and a thermocouple 83, wherein the heating wire 81 is wound on the outer wall of the heating core 3 and is fixed by adhesive, in the embodiment, the heating wire 81 is tungsten wire, and the fixing adhesive is ceramic heat-conducting adhesive, the terminal post 82 is penetrated on the heat insulation cover 10, the terminal post 82 is used for electrically connecting the heating wire 81 and the external circuit, and the thermocouple 83 is fixed on the box body 21 through bolt fixing, and the detection end of the thermocouple 83 is arranged close to the heating core 3 after being inserted into the box body 21 and the heat insulation cover 10.

[0053] With reference to Figure 3 and Figure 4 In use, the tungsten wire is wound on the heating core 3, and then the tungsten wire is adhered and fixed on the heating core 3 through the ceramic heat-conducting adhesive, so that in the process of heating the heating core 3 through the tungsten wire, the heat transmission between the heating core 3 and the tungsten wire is ensured, which is conducive to maintaining the high-temperature environment in the heat insulation cover 10, and at the same time, the temperature in the heat insulation cover 10 is detected in real time by cooperating with the thermocouple 83, so as to facilitate the staff to control the box body 21 to always maintain in a certain temperature range.

[0054] With reference to Figure 4 and Figure 5Two stretching rods 5 are also slidably arranged on the box body 21. The two stretching rods 5 are symmetrically arranged on both sides of the heating core 3, and one end of the stretching rod 5 is located outside the box body 21. The other end of the stretching rod 5 passes through the box body 21 and is arranged close to the heating core 3. A groove 51 is provided at the end of the stretching rod 5 close to the heating core 3, and a clamping structure 6 is provided on the bottom wall of the groove 51. The clamping structure 6 is used to clamp and fix the stretching section 401 of the sample 40; in addition, a sealing structure 7 is also provided on the box body 21. The sealing structure 7 is used to seal the connecting gap between the stretching rod 5 and the box body 21.

[0055] Reference Figure 5 and Figure 6 The clamping structure 6 is composed of an abutment block 61 and a pressure plate 62. The abutment block 61 is integrally formed on the bottom wall of the groove 51, and the side wall surface of the abutment block 61 forms an abutment fit with the arc surface 403 on the sample 40. The pressure plate 62 is located above the groove 51, and one end of the pressure plate 62 is fixed to the stretching rod 5 by bolts, and the side wall of the other end of the pressure plate 62 abuts with the groove 51 on the side wall of the stretching section 401 of the sample 40; when in use, the horizontal direction of the sample 40 is limited by the setting of the groove 51 and the abutment block 61, and the vertical direction of the sample 40 is limited by pressing the sample 40 by the pressure plate 62, so as to ensure that one end of the sample 40 will not be lifted during the horizontal stretching of the sample 40.

[0056] Reference Figure 4 and Figure 7 The sealing structure 7 includes a bellows 71 and a third sealing ring 72, wherein one end of the bellows 71 is welded and fixed to the outer wall of the stretching rod 5, and the other end of the bellows 71 is fixed to the box body 21 by bolts, and the third sealing ring 72 is located between the bellows 71 and the box body 21. The third sealing ring 72 is used to block the connection gap between the bellows 71 and the box body 21; when in use, the deformation characteristics of the bellows 71 itself are used to ensure the horizontal sliding of the stretching rod 5, and at the same time, the third sealing ring 72 is used to seal the connection gap between the box body 21 and the stretching rod 5, thereby ensuring that the box body 21 is always in a vacuum state during the pulling process of the stretching rod 5.

[0057] Reference Figure 4 and Figure 8In order to facilitate the test personnel to observe the test condition of the test sample 40, the observation window 4 is arranged on the box cover 22, the observation window 4 is composed of the test mirror 41 and the clamping block 42, the first observation opening 211 is vertically arranged on the box cover 22, the test mirror 41 is arranged on the first observation opening 211, the clamping block 42 is arranged on the box cover 22, the second observation opening 421 is arranged on the clamping block 42, the first observation opening 211, the second observation opening 421 and the test mirror 41 are arranged in a corresponding position, and the second sealing ring 43 is arranged between the test mirror 41 and the box cover 22.

[0058] With reference to Figure 4 and Figure 8 In the embodiment, the test mirror 41 is made of quartz glass, and the second sealing ring 43 is preferably a spring C-shaped sealing ring. In use, the test mirror 41 and the second sealing ring 43 are used in cooperation to facilitate the test personnel to observe the test condition of the test sample 40 under the premise of ensuring the vacuum environment in the vacuum environment box 2. In addition, in order to prevent heat conduction to the side wall of the box body 21 or the box cover 22 during the heating process in the vacuum environment box 2, causing the test personnel to be accidentally touched and burned, cooling channels are formed in the side walls of the box body 21 and the box cover 22, so that cooling liquid can be introduced into the cooling channels during the heating process.

[0059] With reference to Figure 2 and Figure 9 The synchronous driving assembly 9 is further arranged on the base 1. When the test personnel places the test sample 40 in the vacuum environment box 2 and clamps and fixes the stretching section 401 of the test sample 40 through the clamping structure 6, the vacuum environment box 2 can be fixed on the base 1. Finally, the synchronous driving assembly 9 drives the two stretching rods 5 to slide reversely in synchronization, and the stretching rods 5 slide to exert reverse tension on the two ends of the test sample 40 under the action of the clamping structure 6, so as to load the test sample 40 in the loading process.

[0060] With reference to Figure 9 and Figure 10 The synchronous driving assembly 9 is composed of the sliding seat 91, the bidirectional screw rod 92, the driving pulley 93, the driven pulley 94, the synchronous belt 95 and the driving motor 96. The sliding seat 91 is provided with two sliding seats 91, and the two sliding seats 91 slide on the base 1 in opposite directions. The two sliding seats 91 are provided with the mounting cavity for mounting the vacuum environment box 2. The bidirectional screw rod 92 is arranged on the base 1, and in the embodiment, the bidirectional screw rod 92 is provided with two bidirectional screw rods 92. The two bidirectional screw rods 92 are arranged in the width direction of the base 1. The two ends of one sliding seat 91 are respectively threadedly connected with one bidirectional screw rod 92, and the two sliding seats 91 are respectively threadedly connected with the opposite sides of the bidirectional screw rod 92.

[0061] Reference Figure 9 and Figure 10 The driving pulley 93 and the driven pulley 94 are both rotatably connected to the base 1, wherein the number of driven pulleys 94 is the same as the number of bidirectional screw rods 92, that is, in the present application, there are two driven pulleys 94, and the two driven pulleys 94 are arranged in a one-to-one correspondence with the bidirectional screw rods 92, the driven pulley 94 and the bidirectional screw rods 92 are coaxially fixedly connected, the synchronous belt 95 is wound around the driving pulley 93 and the driven pulley 94, the synchronous belt 95 is transmitted in conjunction with the driving pulley 93 and the two driven pulleys 94, the driving motor 96 is fixed to the base 1 by bolts, and the output shaft of the driving motor 96 is coaxially fixedly connected to the driving pulley 93.

[0062] Reference Figure 9 and Figure 10 When in use, the output shaft of the driving motor 96 is driven to rotate the driving pulley 93. Under the transmission action of the synchronous belt 95, the driving pulley 93 rotates to drive the two driven pulleys 94 to rotate synchronously, thereby driving the two bidirectional screw rods 92 to rotate synchronously, thereby driving the two sliding seats 91 to slide synchronously in the opposite directions. In addition, in order to ensure the transmission ratio between the synchronous belt 95, the driven pulley 94 and the driving pulley 93, a clamping assembly 30 is also provided on the base 1. The clamping assembly 30 is used to clamp the synchronous belt 95 on the driving pulley 93 and the driven pulley 94.

[0063] Reference Figure 9 and Figure 11 The clamping assembly 30 consists of a fixed block 301, a sliding block 302, an adjusting bolt 303 and an abutment wheel 304, wherein the fixed block 301 is fixed to the base 1 by bolts, the sliding block 302 is slidably connected to the base 1, and the sliding block 302 slides with the fixed block 301, the adjusting bolt 303 is rotatably connected to the fixed block 301, the bottom end of the adjusting bolt 303 passes through the fixed block 301 and is threadedly connected to the sliding block 302, the abutment wheel 304 rotates on the sliding block 302, and the outer wall of the abutment wheel 304 abuts and cooperates with the outer wall of the synchronous belt 95.

[0064] Reference Figure 9 and Figure 11 When in use, by screwing the adjusting bolt 303, the distance between the sliding block 302 and the fixed block 301 is changed, so that the height of the abutment wheel 304 is adjusted by adjusting the height of the sliding block 302, and then the pressing force of the abutment wheel 304 on the synchronous belt 95 is adjusted, so that the synchronous belt 95 can be pressed against the driving pulley 93 and the driven pulley 94, thereby ensuring the stability of the synchronous transmission between the synchronous belt 95, the driven pulley 94 and the driving pulley 93.

[0065] Reference Figure 9 and Figure 12A clamping structure 20 is arranged on the base 1, and is used to clamp and fix the stretching rods 5 on the sliding seats 91. The clamping structure 20 is composed of a clamping block 201, a first locking nut 202 and a second locking nut 203. The clamping block 201 is fixed on one of the sliding seats 91 by bolts. The end of one of the stretching rods 5 is screwed with the first locking nut 202 after penetrating through the clamping block 201. The end of the other stretching rod 5 is screwed with the second locking nut 203 after penetrating through the corresponding sliding seat 91.

[0066] With reference to Figure 9 and Figure 12 In use, the vacuum environment box 2 is placed between the two sliding seats 91, and the two stretching rods 5 are arranged corresponding to the two sliding seats 91 respectively. Then, the position of the vacuum environment box 2 is moved, so that the end of one of the stretching rods 5 penetrates through the sliding seat 91 and is locked by screwing the second locking nut 203. The end of the other stretching rod 5 penetrates through the clamping block 201 and is locked by screwing the first locking nut 202. In this way, the connection between the stretching rods 5 and the sliding seats 91 is completed. Finally, the vacuum environment box 2 is fixed on the base 1, so as to ensure the stability of the vacuum environment box 2 in the subsequent load loading process.

[0067] With reference to Figure 9 In order to facilitate the observation of the stretching length of the test piece by the experimenters, a scale bar 14 is arranged on the base 1. The scale bar 14 is arranged close to one of the sliding seats 91, and a mark plate is fixed on the sliding seat 91. The mark plate is arranged to point to the scale bar 14. In use, the experimenters can judge the sliding distance of the sliding seat 91 by observing the position of the mark plate pointing to the scale bar 14, so as to more accurately judge the load loading result of the test piece 40.

[0068] The implementation principle of the embodiment of the present application is as follows: when in use, first open the box cover 22, place the sample 40 on the heating core 3, and clamp the stretching sections 401 at both ends of the sample 40 through the clamping structures 6 on both sides, then close the insulation board 101 and the box cover 22 in turn, and place the vacuum environment box 2 on the base 1, and then connect the two stretching rods 5 to the sliding seats 91 on the corresponding sides respectively. After the stretching rods 5 and the sliding seats 91 are connected, fix the vacuum environment box 2 on the base 1, and then evacuate the vacuum environment box 2. At the same time, through the cooperation of the heating wire 81 and the thermocouple 83, control the temperature in the vacuum environment box 2 to be maintained within a certain range, and finally start the drive motor 96 to drive the drive pulley 93 to rotate, and on the synchronous belt 9 5 and the abutment wheel 304, the two driven pulleys 94 rotate synchronously, thereby driving the two bidirectional screws 92 to rotate synchronously, thereby driving the two sliding seats 91 to slide in the opposite directions synchronously, thereby realizing the reverse pulling of the stretching sections 401 at both ends of the sample 40, and during the pulling process, the gauge section 402 of the sample 40 is always in place, that is, the process of in-situ dynamic mechanical testing of the sample 40 can be realized in a vacuum and high temperature environment; in order to facilitate the experimenter to observe the testing process in real time, before stretching the sample 40, the entire device can be placed under an optical microscope, so that the optical microscope can be used to observe the microscopic changes of the gauge section 402 of the sample 40 in real time through the observation window 4. The overall use is simple and convenient, and the overall size of the device is small, which is more convenient to move.

[0069] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An in-situ dynamic mechanical testing device for sample detection, characterized by: The invention comprises a base (1), a vacuum environment box (2) is provided on the base (1), a heating core (3) for positioning a gauge section (402) of a sample (40) is fixed in the vacuum environment box (2), an observation window (4) for observing the test condition of the gauge section (402) of the sample (40) on the heating core (3) is provided on the vacuum environment box (2), a stretching rod (5) is slidably provided on the vacuum environment box (2), two stretching rods (5) are provided, and the two stretching rods (5) are symmetrically arranged on both sides of the heating core (3), and one end of the stretching rod (5) is located at the vacuum environment box (2). ), the other end of the stretching rod (5) passes through the vacuum environment box (2) and is located on the side of the heating core (3), one end of the stretching rod (5) located in the vacuum environment box (2) is provided with a clamping structure (6) for clamping and fixing the stretching section (401) of the sample (40), the vacuum environment box (2) is provided with a sealing structure (7) for sealing the connecting gap between the stretching rod (5) and the side wall of the vacuum environment box (2), and a heating structure (8) for heating the heating core (3), and the base (1) is provided with a synchronous driving component (9) for driving the two stretching rods (5) to slide synchronously in opposite directions.

2. The in-situ dynamic mechanical testing device for sample detection according to claim 1, characterized in that: The vacuum environment box (2) comprises a box body (21) detachably connected to a base (1), and a box cover (22) buckled on the box body (21); a first sealing ring (23) is provided between the box body (21) and the box cover (22); the heating core (3), the clamping structure (6), the heating structure (8) and the sealing structure (7) are all located on the box body (21); and the observation window (4) is detachably connected to the box cover (22).

3. The in-situ dynamic mechanical testing device for sample detection according to claim 2, characterized in that: The observation window (4) comprises a trial mirror (41) placed on the box cover (22), and a clamping block (42) for clamping and fixing the trial mirror (41) on the box cover (22); a first observation port (211) is provided through the box cover (22); the trial mirror (41) is blocked at the first observation port (211); a second sealing ring (43) is provided between the trial mirror (41) and the box cover (22); the clamping block (42) is detachably connected to the box cover (22); a second observation port (421) is provided on the clamping block (42); the second observation port (421), the trial mirror (41) and the first observation port (211) are correspondingly arranged.

4. The in-situ dynamic mechanical testing device for sample detection according to claim 1, characterized in that: The clamping structure (6) includes an abutment block (61) and a pressure plate (62) fixed to the end of the stretching rod (5); one end of the stretching rod (5) extending into the vacuum environment box (2) is provided with a groove (51) for placing the stretching section (401) of the sample (40); the abutment block (61) is fixed to the bottom wall of the groove (51), and the abutment block (61) is in abutment with the upper arc surface (403) of the sample (40); one end of the pressure plate (62) is fixed to the stretching rod (5), and the other end of the pressure plate (62) is in abutment with the side wall of the stretching section (401) of the sample (40).

5. The in-situ dynamic mechanical testing device for sample detection according to claim 1, characterized in that: The sealing structure (7) comprises a corrugated sleeve (71) sleeved on the stretching rod (5), and a third sealing ring (72) arranged between the end of the corrugated sleeve (71) and the side wall of the vacuum environment box (2); one end of the corrugated sleeve (71) is fixed to the side wall of the stretching rod (5), and the other end of the corrugated sleeve (71) is fixed to the outer wall of the vacuum environment box (2).

6. The in-situ dynamic mechanical testing device for sample detection according to claim 1, characterized in that: The heating structure (8) comprises a heating wire (81) fixed on the outer wall of the heating core (3), and a terminal (82) and a thermocouple (83) fixed on the vacuum environment box (2); the terminal (82) is used to electrically connect the heating wire (81) to an external circuit, and the thermocouple (83) is used to monitor the temperature of the heating core (3) in real time.

7. The in-situ dynamic mechanical testing device for sample detection according to claim 1, characterized in that: A heat insulation cover (10) is further provided in the vacuum environment box (2). The heat insulation cover (10) is provided in a plurality of groups, and the plurality of groups of the heat insulation covers (10) are arranged in a sleeve-type manner. The heating core (3) is fixed in the innermost heat insulation cover (10). A heat insulation board (101) is fixed on the heat insulation cover (10). The heat insulation board (101) is used to seal the heating core (3) in the heat insulation cover (10). The heat insulation board (101) is also provided in a plurality of groups, and the plurality of heat insulation boards (101) are arranged in a one-to-one correspondence with the heat insulation cover (10).

8. The in-situ dynamic mechanical testing device for sample detection according to claim 1, characterized in that: The synchronous drive assembly (9) comprises two sliding seats (91) relatively slidingly arranged on the base (1), a bidirectional screw (92) rotating on the base (1), a driving pulley (93) and a driven pulley (94) rotating on the base (1), a synchronous belt (95) wound between the driving pulley (93) and the driven pulley (94), and a driving motor (96) fixed on the base (1), the two sliding seats (91) are respectively screwed on one side of the bidirectional screw (92) in the opposite direction of the thread direction. The driven pulley (94) is coaxially fixedly connected to one end of the bidirectional screw rod (92), the driving pulley (93) is coaxially fixedly connected to the output shaft of the driving motor (96), the synchronous belt (95) is in transmission cooperation with the driving pulley (93) and the driven pulley (94), and the base (1) is provided with a clamping structure (20) for clamping and fixing the stretching rod (5) and the sliding seat (91) together, and a clamping assembly (30) for pressing the synchronous belt (95) onto the driving pulley (93) and the driven pulley (94).

9. The in-situ dynamic mechanical testing device for sample detection according to claim 8, characterized in that: The clamping structure (20) comprises a clamping block (201) fixed on one of the sliding seats (91), a first locking nut (202) arranged on the clamping block (201), and a second locking nut (203) arranged on the other sliding seat (91); one end of the stretching rod (5) is passed through one sliding seat (91) and threadedly engaged with the second locking nut (203); the other end of the stretching rod (5) is passed through the clamping block (201) and threadedly engaged with the first locking nut (202); the first locking nut (202) abuts against the clamping block (201), and the second locking nut (203) abuts against the side wall of the corresponding sliding seat (91).

10. The in-situ dynamic mechanical testing device for sample detection according to claim 8, characterized in that: The clamping assembly (30) comprises a fixed block (301) fixedly connected to the base (1), a sliding block (302) slidably arranged on the base (1), an adjusting bolt (303) arranged between the fixed block (301) and the sliding block (302), and an abutting wheel (304) rotatably mounted on the sliding block (302), wherein the adjusting bolt (303) is rotatably connected to the fixed block (301), and one end of the adjusting bolt (303) passes through the fixed block (301) and is threadedly connected to the sliding block (302), and an outer wall of the abutting wheel (304) abuts against the outer side of the synchronous belt (95).

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