Mechanical testing system

Abstract

The invention provides a mechanical testing system, and belongs to the technical field of material testing. Comprising a size measuring mechanism used for measuring the size of a sample; a stretching mechanism is arranged on the supporting frame; the non-contact measuring mechanism and the contact measuring mechanism are arranged on the supporting frame through a first position adjusting mechanism and used for measuring the deformation amount of the sample in the stretching process in a non-contact measuring mode and a contact measuring mode; the first heating mechanism and the second heating mechanism are oppositely arranged on the supporting frame through a second position adjusting mechanism and are used for heating the sample in a non-contact measurement mode and a contact measurement mode; the controller is used for controlling the stretching mechanism, the non-contact measuring mechanism, the contact measuring mechanism, the second position adjusting mechanism, the first heating mechanism and the second heating mechanism to work; and storing the received size information and deformation information. The mechanical property testing device is simple in structure and convenient to operate, and can accurately test the mechanical property of a micro-size sample.

Description

Technical Field

[0001] The invention relates to the technical field of material testing, and in particular to a mechanical testing system. Background Art

[0002] In key areas such as electricity, aerospace, chemical industry and machinery manufacturing, metal materials are often faced with tensile and compressive loads at high temperatures. The tensile mechanical properties of these materials in high temperature environments are extremely critical for evaluating the safe operation of equipment. Traditional mechanical property tests usually use larger specimens, which are easy to measure and do not require particularly high test accuracy, as long as they meet established standards. However, in actual applications, metal materials may not fully meet the preparation conditions of standard specimens due to space limitations, special shapes or size constraints. In addition, cutting standard specimens from metal parts may cause significant damage to them. Therefore, in these cases, only small-sized specimens can be collected, which requires us to perform mechanical property tests on these small-sized metal parts.

[0003] Mechanical property testing usually requires the use of specialized testing devices. The measurement accuracy of the testing device is directly related to the accuracy of the test results. At present, the accuracy level of mechanical property testing devices commonly used in engineering usually only needs to meet the standard requirements, and the error is generally controlled below ±0.5%. When testing large specimens, the measurement errors of these devices have a relatively small impact on the results due to the large parameters such as load deformation. However, for small or micro specimens, due to their small cross-sectional area and length, even a small measurement error may have a significant impact on the test results of material properties. Therefore, improving the accuracy of the measuring device is particularly critical for mechanical property testing of micro specimens.

[0004] In order to overcome the accuracy problem of micro-specimens in mechanical property measurement and ensure the accuracy of test results, it is necessary to develop a high-precision mechanical property testing device designed specifically for micro-specimens. Summary of the invention

[0005] The purpose of the embodiment of the present invention is to provide a mechanical testing system, which is used to solve the problems of low testing accuracy and inaccurate testing results for micro-specimens in the prior art.

[0006] In order to achieve the above object, an embodiment of the present invention provides a mechanical testing system, the system comprising:

[0007] Dimension measuring mechanism, used to measure the dimensions of the specimen before and after stretching;

[0008] A supporting frame, wherein a stretching mechanism is disposed on the supporting frame, and the stretching mechanism is used to carry the sample and apply a tensile force to the sample to perform a tensile test;

[0009] The non-contact measuring mechanism and the contact measuring mechanism are arranged on the supporting frame through the corresponding first position adjusting mechanism; the spatial positions of the non-contact measuring mechanism and the contact measuring mechanism are adjusted by the corresponding first position adjusting mechanism; in the non-contact measuring mode, the measuring port of the non-contact measuring mechanism is aligned with the sample to measure the deformation of the sample during the stretching process; in the contact measuring mode, the measuring head of the contact measuring mechanism is in contact with the sample to measure the deformation of the sample during the stretching process;

[0010] The first heating mechanism and the second heating mechanism are relatively arranged on the support frame through the corresponding second position adjustment mechanism, and the spatial positions of the first heating mechanism and the second heating mechanism are adjusted by the corresponding second position adjustment mechanism; the first heating mechanism is used to heat the sample in the non-contact measurement mode, and the second heating mechanism is used to heat the sample in the contact measurement mode;

[0011] The controller is connected to the dimension measuring mechanism, the stretching mechanism, the non-contact measuring mechanism, the contact measuring mechanism, the second position adjusting mechanism, the first heating mechanism and the second heating mechanism, and is used to: control the stretching mechanism, the first heating mechanism, the non-contact measuring mechanism and its corresponding second position adjusting mechanism based on the non-contact measuring instruction; control the stretching mechanism, the second heating mechanism, the contact measuring mechanism and its corresponding second position adjusting mechanism based on the contact measuring instruction; and store the dimension information and deformation information.

[0012] Optionally, the system further includes:

[0013] An infrared temperature measuring mechanism is connected to the controller, and the temperature measuring port of the infrared temperature measuring mechanism is aimed at the sample, and is used to measure the temperature value of the sample before stretching;

[0014] The controller is also used to store the temperature value.

[0015] Optionally, the size measuring mechanism includes:

[0016] Loading platform;

[0017] A clamping mechanism, disposed on the bearing platform, for clamping the sample during the dimension measurement process;

[0018] The dimension measuring instrument is arranged on the supporting platform and is used to measure the dimension information of the sample before and after stretching.

[0019] Optionally, the clamping mechanism includes:

[0020] Two mounting frames are slidably arranged on the bearing platform, and mounting plates are rotatably arranged on the tops of the two mounting frames;

[0021] Clamping claws are arranged opposite to each other, each clamping claw is slidably arranged on the mounting plate through a clamping slider, and the clamping slider can slide on the mounting plate under the action of a driving force, and the clamping claws are used to clamp the sample;

[0022] Each clamping slide block is provided with a tightening screw, and the clamping slide block is fixed on the mounting plate by rotating the tightening screw so that the end of the tightening screw contacts the mounting plate.

[0023] Optionally, the stretching mechanism includes:

[0024] A fixing rod, arranged on the supporting frame;

[0025] A pull rod is arranged on the support frame through a motion mechanism, the pull rod is located above the fixed rod, the bottom end of the fixed rod and the top end of the pull rod are used to connect the sample, and the motion mechanism is used to generate a tensile force in the vertical direction.

[0026] Optionally, the motion mechanism includes:

[0027] A crossbeam is slidably arranged on the support frame by stretching a slider;

[0028] The first driving mechanism is arranged on the supporting frame and is used to generate a driving force to drive the stretching slider to move.

[0029] Optionally, the pull rod is further connected to the motion mechanism via a coaxiality adjustment mechanism, and the coaxiality adjustment mechanism is used to adjust the coaxiality between the pull rod and the fixed rod.

[0030] Optionally, the first heating mechanism and the second heating mechanism both include:

[0031] Two heating blocks arranged opposite to each other can be rotatably arranged on the corresponding second position adjustment mechanism, and the two heating blocks can realize the switching between the open state and the closed state under the action of the driving force, and the middle parts of the two heating blocks are provided with grooves, and the grooves in the middle parts of the two heating blocks form a receiving cavity for receiving the sample in the closed state;

[0032] A measuring window is provided on at least one heating block;

[0033] In the non-contact measurement mode, the measuring port of the non-contact measurement mechanism is aligned with the measuring window to measure the deformation of the sample during the stretching process through the measuring window;

[0034] In the contact measurement mode, the measuring head of the contact measurement mechanism passes through the measuring window to measure the deformation of the sample during the stretching process.

[0035] Optionally, the first position adjustment mechanism includes:

[0036] A first slide rail arranged vertically;

[0037] A first slider is slidably disposed on the first slide rail, and a positioning screw is disposed on the first slider. The positioning screw is rotated so that an end of the positioning screw contacts the first slide rail, thereby fixing the first slider on the first slide rail;

[0038] A connecting frame, the rotating end of which can be rotatably connected to the second sliding block, and the non-contact measuring mechanism and the contact measuring mechanism are arranged at the free end of the corresponding connecting frame.

[0039] Optionally, the second position adjustment mechanism includes:

[0040] A second slide rail is vertically arranged, a second slider is slidably arranged on the second slide rail, and a gear is arranged on the second slider;

[0041] A second driving mechanism is arranged on the supporting frame, wherein a driving end of the second driving mechanism is connected to the second slider and is used to generate a driving force to drive the second slider to move;

[0042] A horizontally arranged connecting rod, wherein the rotating end of the connecting rod is rotatably connected to the second sliding block, and the first heating mechanism and the second heating mechanism are arranged at the free ends of the corresponding connecting rod;

[0043] The driving motor is arranged on the connecting rod, and the driving shaft of the driving motor is meshed and connected with the gear through a synchronous belt. The driving motor is used to generate a driving force to make the connecting rod rotate relative to the second slider.

[0044] The technical solution realizes dimension measurement through a dimension measuring mechanism, and simultaneously sets a non-contact measuring mechanism and a contact measuring mechanism on the supporting frame, and correspondingly sets a first heating mechanism and a second heating mechanism to heat the material, and can realize accurate measurement of micro-sized specimens through non-contact and contact measurement methods. The overall structure is simple, the operation is convenient, and reliable data support can be provided for the evaluation of the mechanical properties of the material.

[0045] Other features and advantages of the embodiments of the present invention will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific implementations, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. In the accompanying drawings:

[0047] Figure 1 It is a structural schematic diagram of a first mechanical testing system provided by the present invention;

[0048] Figure 2is a structural schematic diagram of a second mechanical testing system provided by the present invention;

[0049] Figure 3 It is a structural schematic diagram of the dimension measuring mechanism provided by the present invention;

[0050] Figure 4 is a test schematic diagram of the dimension measuring mechanism provided by the present invention after the angle is adjusted;

[0051] Figure 5 It is a partial structural schematic diagram of the mechanical testing system provided by the present invention;

[0052] Figure 6 It is a partial structural schematic diagram of the stretching mechanism provided by the present invention;

[0053] Figure 7 It is a structural schematic diagram of the coaxiality adjustment mechanism provided by the present invention;

[0054] Figure 8 It is a structural schematic diagram of the first heating mechanism or the second heating mechanism provided by the present invention;

[0055] Fig. 9 is a structural schematic diagram of a first position adjustment mechanism provided by the present invention;

[0056] Fig.10 It is a structural schematic diagram of the second position adjustment mechanism provided by the present invention.

[0057] Description of Reference Numerals

[0058] 1- Dimension measuring mechanism; 2- Support frame; 3- Stretching mechanism;

[0059] 4- non-contact measuring mechanism; 5- contact measuring mechanism; 6- first position adjustment mechanism;

[0060] 7-first heating mechanism; 8-second heating mechanism; 9-second position adjustment mechanism;

[0061] 10-controller; 11-carrying platform; 12-clamping mechanism;

[0062] 13-dimension measuring instrument; 20-infrared temperature measuring mechanism; 31-fixing rod;

[0063] 32-pull rod; 33-movement mechanism; 34-coaxiality adjustment mechanism;

[0064] 61-first slide rail; 62-first slide block; 63-connecting frame;

[0065] 71-heating block; 91-second slide rail; 92-second slide block;

[0066] 93-gear; 94-second driving mechanism; 95-connecting rod;

[0067] 96-driving motor; 121-mounting frame; 122-mounting plate;

[0068] 123-clamping claw; 124-clamping slider; 125-tightening screw;

[0069] 331-crossbeam; 332-stretching slider; 333-first driving mechanism;

[0070] 341-flange; 342-fixed cylinder; 343-T-bar;

[0071] 344-inner arc surface sleeve; 345-translation adjustment top screw; 346-hole;

[0072] 347-angle adjustment top block; 348-angle rotation top screw; 621-positioning screw;

[0073] 701-groove; 702-measuring window. DETAILED DESCRIPTION

[0074] The specific implementation of the embodiment of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiment of the present invention, and is not used to limit the embodiment of the present invention.

[0075] In the embodiments of the present invention, unless otherwise specified, directional words such as "up, down, left, right" generally refer to the directions or positional relationships shown in the accompanying drawings, or the directions or positional relationships in which the inventive product is usually placed when in use.

[0076] The terms “first”, “second”, “third”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0077] The terms "parallel", "vertical", etc. do not mean that the components must be absolutely parallel or vertical, but can be slightly tilted. For example, "parallel" only means that its direction is more parallel than "vertical", and does not mean that the structure must be completely parallel, but can be slightly tilted.

[0078] The terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal, vertical or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0079] In addition, the terms "roughly" and "basically" are intended to explain that the relevant content does not require absolute precision, but can have certain deviations. For example, "roughly equal" does not only mean absolute equality. Since it is difficult to achieve absolute "equality" in actual production and operation, there are generally certain deviations. Therefore, in addition to absolute equality, "roughly equal" also includes the above-mentioned situation with certain deviations. Taking this as an example, in other cases, unless otherwise specified, the terms "roughly" and "basically" have similar meanings to the above.

[0080] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0081] Figure 1 It is a structural schematic diagram of a first mechanical testing system provided by the present invention; Figure 2 is a structural schematic diagram of a second mechanical testing system provided by the present invention; Figure 3 It is a structural schematic diagram of the dimension measuring mechanism provided by the present invention; Figure 4 is a test schematic diagram of the dimension measuring mechanism provided by the present invention after the angle is adjusted; Figure 5 It is a partial structural schematic diagram of the mechanical testing system provided by the present invention; Figure 6 It is a partial structural schematic diagram of the stretching mechanism provided by the present invention; Figure 7 It is a structural schematic diagram of the coaxiality adjustment mechanism provided by the present invention; Figure 8 It is a structural schematic diagram of the first heating mechanism or the second heating mechanism provided by the present invention; Fig. 9 is a structural schematic diagram of a first position adjustment mechanism provided by the present invention; Fig.10 It is a structural schematic diagram of the second position adjustment mechanism provided by the present invention.

[0082] Since the measurement accuracy of the mechanical properties testing device has a great influence on the test results, ordinary mechanical properties testing devices are inspected according to general procedures, and their measurement errors can be controlled below ±0.5%. The measurement accuracy of the sample size is generally 0.01mm, and its design and manufacture are also carried out according to standard samples, so it can only meet the testing requirements of standard size samples. Micro-specimens have higher requirements for the accuracy of the testing device, and their measurement errors need to be controlled below ±0.1%. In addition, the accuracy of the dimensional measurement unit required by micro-specimens is higher, and the resolution is required to be below 0.00001mm. In this way, conventional mechanical properties testing devices cannot meet the needs of micro-specimen testing. In order to meet the requirements of small-sized micro-specimens for performance measurement accuracy, the mechanical properties of micro-specimens can be tested more accurately, and the safety status of related metal material products can be accurately evaluated. Therefore, this embodiment provides a mechanical testing system, such as Figure 1-2 , the system comprising:

[0083] A dimension measuring mechanism 1, used for measuring the dimension of the sample before and after stretching;

[0084] A support frame 2, on which a stretching mechanism 3 is disposed, and the stretching mechanism 3 is used to carry a sample and apply a tensile force to the sample to perform a tensile test;

[0085] The non-contact measuring mechanism 4 and the contact measuring mechanism 5 are respectively arranged on the supporting frame 2 through the corresponding first position adjusting mechanism 6; in the non-contact measuring mode, the measuring port of the non-contact measuring mechanism 4 is aligned with the sample to measure the deformation of the sample during the stretching process; in the contact measuring mode, the measuring head of the contact measuring mechanism 5 is in contact with the sample to measure the deformation of the sample during the stretching process; the spatial positions of the non-contact measuring mechanism 4 and the contact measuring mechanism 5 are adjusted by the corresponding first position adjusting mechanism 6;

[0086] The first heating mechanism 7 and the second heating mechanism 8 are respectively arranged on the support frame 2 relatively through the corresponding second position adjustment mechanism 9, the first heating mechanism 7 is used to heat the sample in the non-contact measurement mode, and the second heating mechanism 8 is used to heat the sample in the contact measurement mode, and the spatial positions of the first heating mechanism 7 and the second heating mechanism 8 are adjusted by the corresponding second position adjustment mechanism 9;

[0087] The controller 10 is connected to the dimension measuring mechanism 1, the stretching mechanism 3, the non-contact measuring mechanism 4, the contact measuring mechanism 5, the second position adjusting mechanism 9, the first heating mechanism 7 and the second heating mechanism 8, and is used to control the stretching mechanism 3, the non-contact measuring mechanism 4, the corresponding second position adjusting mechanism 9 and the first heating mechanism 7 based on the received non-contact measurement instructions; control the stretching mechanism 3, the contact measuring mechanism 5, the corresponding second position adjusting mechanism 9 and the second heating mechanism 8 based on the received contact measurement instructions; and store the received dimension information and deformation information.

[0088] Specifically, in this embodiment, the size measuring mechanism 1 can clamp the sample so as to measure the size of the sample before and after the tensile test; the support frame 2 can be configured to include: a base and two vertical support beams arranged on the base, and the tops of the two vertical support beams are connected to each other by a horizontal connecting beam to ensure the overall structural strength; in addition, a leveling mechanism is provided at the bottom end of the base to keep the whole horizontal so as to ensure the accuracy of the data during the subsequent mechanical testing process; in addition, in order to ensure the accuracy of data measurement and improve the scope of application, a non-contact measuring mechanism 4 and a contact measuring mechanism 5 are respectively provided on one surface of the two vertical support beams of the support frame 2 through a first position adjustment mechanism 6. The non-contact measuring mechanism 4 is used to measure the deformation of the sample during the tensile process in a non-contact measurement mode. The non-contact measuring mechanism 4 uses images, lasers, etc. to realize deformation detection of the sample, which is more suitable for samples with smaller sizes and can ensure the accuracy of the data; the contact measuring mechanism 5 is used to measure the deformation of the sample during the tensile process in a contact measurement mode. The contact measuring mechanism 5 can be a deformation detection probe. Since the contact measuring mechanism 5 has lower accuracy than the non-contact measuring mechanism 4, the contact measuring mechanism 5 is more suitable for samples with larger sizes. The corresponding first position adjustment mechanism 6 can realize the position switching of the non-contact measuring mechanism 4 and the contact measuring mechanism 5, so as to realize the input and output of the non-contact measuring mechanism 4 and the contact measuring mechanism 5 in different measurement modes; and in order to adapt to the non-contact measuring mechanism 4 and the contact measuring mechanism 5, a first heating mechanism 7 and a second heating mechanism 8 are respectively arranged on the other surface of the two vertical support beams of the support frame 2 through a second position adjustment mechanism 9. The first heating mechanism 7 is used to heat the sample in the non-contact measurement mode, and the second heating mechanism 8 is used to heat the sample in the contact measurement mode. The corresponding second position adjustment mechanism 9 can realize the position switching of the first heating mechanism 7 and the second heating mechanism 8, so as to realize the input and output of the first heating mechanism 7 and the second heating mechanism 8 in different measurement modes. In addition, in order to realize the intelligent test, a controller 10 is correspondingly set, and the controller 10 is connected to the size measuring mechanism 1, the stretching mechanism 3, the non-contact measuring mechanism 4, the contact measuring mechanism 5, the second position adjusting mechanism 9, the first heating mechanism 7 and the second heating mechanism 8. The controller 10 is used to control the stretching mechanism 3, the non-contact measuring mechanism 4, the corresponding second position adjusting mechanism 9 and the first heating mechanism 7 based on the received non-contact measurement instructions; the controller 10 is also used to control the stretching mechanism 3, the contact measuring mechanism 5, the corresponding second position adjusting mechanism 9 and the second heating mechanism 8 based on the received contact measurement instructions; and is used to store the received size information and deformation information. In addition, the tensile mechanical properties of the sample can be obtained based on the received size information and deformation information.

[0089] Furthermore, if Figure 2As shown, the system also includes:

[0090] An infrared temperature measuring mechanism 20 is connected to the controller 10, and a temperature measuring port of the infrared temperature measuring mechanism 20 is aimed at the sample, and is used to measure the temperature value of the sample before stretching;

[0091] The controller 10 is further configured to store the received temperature value.

[0092] Specifically, in this embodiment, the system also includes an infrared temperature measuring mechanism 20, which is arranged on one side of the support frame 2 through a bracket, and the temperature measuring port of the infrared temperature measuring mechanism 20 is aligned with the sample, and is used to measure the temperature value of the sample before stretching. The controller 10 is also connected to the infrared temperature measuring mechanism 20, and is used to store the received temperature value, and can also analyze the stored data to obtain the temperature field of the sample during the heating process, and the temperature changes with time. The infrared temperature measuring mechanism 20 is also used to detect the temperature of the high temperature environment system during the heating process or the test process, to avoid test errors caused by damage to the high temperature environment system, and to ensure the continuity and accuracy of the high temperature environment.

[0093] Furthermore, if Figure 3 As shown, the dimension measuring mechanism 1 comprises:

[0094] Carrying platform 11;

[0095] A clamping mechanism 12, disposed on the carrier platform 11, for clamping the sample during the dimension measurement process;

[0096] The dimension measuring instrument 13 is disposed on the supporting platform 11 and is used to measure the dimension information of the sample before and after stretching.

[0097] Specifically, in this embodiment, the dimension measuring mechanism 1 includes a carrier 11 to provide a working platform, and a clamping mechanism 12 and a dimension measuring instrument 13 are arranged on the carrier 11. The clamping mechanism 12 is used to clamp the sample before and after the tensile test, and the size of the sample before and after the tensile test is measured by the dimension measuring instrument 13. The dimension measuring instrument 13 uses a visual method to measure the size, and outputs the size information of the sample after taking an image of the sample and analyzing the image. Since the structure of the clamping mechanism 12 is fixed, how to obtain the size information of the object in the image based on the image is a prior art known to those skilled in the art, and will not be repeated here. The dimension measuring instrument 13 further includes: the clamping mechanism 12 can realize one-key automatic measurement and automatic input, the unit is millimeter, and the accuracy is 0.0001mm.

[0098] like Figure 3-4 As shown, the clamping mechanism 12 includes:

[0099] The mounting frame 121 is slidably disposed on the bearing platform 11, and the tops of the two mounting frames 121 are rotatably provided with mounting plates 122;

[0100] Clamping claws 123 are arranged opposite to each other, each clamping claw 123 is slidably arranged on the mounting frame 121 through a clamping slider 124, and the clamping slider 124 can slide on the mounting frame 121 under the action of a driving force, and the clamping claws 123 are used to clamp the sample;

[0101] A tightening screw 125 is disposed on each clamping slider 124 . The clamping slider 124 is fixed on the mounting plate 122 by rotating the tightening screw 125 so that the end of the tightening screw 125 contacts the mounting plate 122 .

[0102] Specifically, in this embodiment, in order to achieve the clamping of the sample, the clamping mechanism 12 is configured to include a mounting frame 121, which can be slidably arranged on the carrier 11 through corresponding tracks and sliders, so that when the mounting frame 121 is pulled outward, it is convenient to mount the sample on the clamping claw 123. After the sample is clamped, the mounting frame 121 is pushed inward so that the sample is located below the dimension measuring instrument 13, thereby achieving the size detection; in addition, since the sample will be broken into two parts after the tensile test, the two clamping claws 123 arranged opposite to each other clamp the two broken samples respectively. At the same time, in order to facilitate the clamping The sample is arranged by setting each clamping claw 123 on a clamping slider 124, so that the relative distance between the two clamping claws 123 can be adjusted. When the clamping slider 124 is clamped in place, it is tightened by the tightening screw 125 to prevent the slider from displacement. Preferably, in this embodiment, in order to ensure the accuracy of the dimensional test, a mounting plate 122 is rotatably arranged at the top of the two mounting frames 121 through a pin or a bearing, and the clamping slider 124 is slidably arranged on the mounting plate 122 through a corresponding track, so that during the test, by rotating the mounting plate 122, the dimensional test of the sample in different directions can be achieved, such as Figure 3-4 The figures are test schematic diagrams before and after the sample is rotated 90 degrees. In addition, in order to facilitate the rotation of the mounting plate 122, a rotating wheel is arranged at the end of the mounting plate 122, and the mounting plate 122 is rotated by holding the rotating wheel. Secondly, in order to ensure that the clamping claw 123 can clamp and release the sample, the clamping claw 123 is arranged to include a support rod, and three clamping rods are arranged at the end of the support rod. The three clamping rods can produce a certain amount of deformation. The fixed ends of the three clamping rods are connected to the clamping slider 124. At the same time, an external thread is arranged on the outer wall of the support rod, and an adjusting sleeve is sleeved on the three clamping rods. The first end of the adjusting sleeve is threadedly connected to the support rod through a thread, and the inner wall of the second end of the adjusting sleeve contacts with the three clamping rods. The clamping and loosening of the three clamping rods are achieved by rotating the adjusting sleeve.

[0103] In another embodiment, the clamping slider 124 and the mounting plate 122 may be fixed by an adjustable magnetic base structure.

[0104] In another embodiment, the clamping slider 124 can be driven directly by manpower, or by a retractable structure such as a screw nut mechanism, an adjusting bolt, an electric cylinder, a hydraulic cylinder, or a pneumatic cylinder; when set as a bolt, the end of the adjusting bolt is connected to the clamping slider 124 through a bearing, and the clamping slider 124 is pushed to move by rotating the bolt.

[0105] Furthermore, if Figure 5-6 As shown, the stretching mechanism 3 comprises:

[0106] A fixing rod 31 is arranged on the supporting frame 2;

[0107] The pull rod 32 is arranged on the support frame 2 through a moving mechanism 33. The pull rod 32 is located above the fixed rod 31. The bottom end of the fixed rod 31 and the top end of the pull rod 32 are connected to the sample. The moving mechanism 33 is used to generate a tensile force in the vertical direction.

[0108] Specifically, in this embodiment, in order to achieve the stretching of the sample, the stretching mechanism 3 is configured to include: a fixed rod 31, the bottom end of the fixed rod 31 is fixed to the base of the support frame 2, and at the same time, by arranging a moving mechanism 33 on the two vertical support beams of the support frame 2, the moving mechanism 33 can move up and down along the two vertical support beams, and the pull rod 32 is fixed to the moving mechanism 33 to achieve synchronous movement. In order to facilitate the installation of the sample, a threaded mounting hole is set at the top of the fixed rod 31 and the bottom of the pull rod 32, and external threads are set at both ends of the sample, and the sample is connected to the top of the fixed rod 31 and the bottom of the pull rod 32 by means of threads, so as to control the moving mechanism 33 to move upward and achieve the stretching of the sample. More specifically, since the connection between the sample and the top of the fixed rod 31 and the bottom of the pull rod 32 is achieved by means of threads, in order to facilitate the installation and removal of the sample, the bottom end of the fixed rod 31 is connected to the base of the support frame 2 through a thrust bearing to achieve the rotation of the fixed rod 31, thereby achieving the installation of the sample.

[0109] In another embodiment, the connection between the sample and the top end of the fixed rod 31 and the bottom end of the pull rod 32 is achieved by snapping. The stretching mechanism 3 also includes: a high-precision load sensor connected to the controller, which is used to detect the load value during the stretching process and send the collected load value to the controller for storage.

[0110] Furthermore, if Fig. 9 As shown, the motion mechanism 33 includes:

[0111] The crossbeam 331 is slidably arranged on the support frame 2 by stretching the slider 332;

[0112] The first driving mechanism 333 is disposed on the supporting frame 2 and is used to generate a driving force to drive the stretching slider 332 to move.

[0113] Specifically, in this embodiment, in order to achieve the installation of the pull rod 32 and ensure that the stretching force is relatively uniform, the top end of the pull rod 32 is set in the middle of the cross beam 331, and the two ends of the cross beam 331 are slidably set on the two vertical support beams of the support frame 2 through the stretching slider 332 to ensure the stability of the connecting mechanism; the first driving mechanism 333 is connected to the stretching slider 332, and can generate a driving force to drive the stretching slider 332 to move up and down along the two vertical support beams of the support frame 2.

[0114] Preferably, one first driving mechanism 333 can be provided to drive only one of the stretching sliders 332; or two can be provided to move synchronously to drive the corresponding stretching sliders 332 respectively; specifically, it can be provided to be a retractable structure such as a screw-nut mechanism, an electric cylinder, a hydraulic cylinder, or a pneumatic cylinder, so as to drive the crossbeam 331, thereby driving the stretching slider 332 to slide and move on the support frame 2.

[0115] Furthermore, if Figure 5-6 , Figure 9-10 As shown, the pull rod 32 is also connected to the motion mechanism 33 via a coaxiality adjustment mechanism 34 , and the coaxiality adjustment mechanism 34 is used to adjust the coaxiality between the pull rod 32 and the fixed rod 31 .

[0116] Specifically, in this embodiment, in order to ensure the accuracy of the tensile test data and eliminate the data deviation caused by the slight misalignment between the pull rod 32 and the fixed rod 31, the motion mechanism 33 is also connected through a coaxiality adjustment mechanism 34. The coaxiality adjustment mechanism 34 can fine-tune the displacement of the pull rod 32 in the XY direction, thereby adjusting the coaxiality between the pull rod 32 and the fixed rod 31 so that the pull rod 32 and the fixed rod 31 are in a vertical line.

[0117] In one embodiment, Figure 7 As shown, the coaxiality adjustment mechanism 34 can be configured to include:

[0118] A flange 341 connected to the crossbeam 331;

[0119] The internally hollow fixed cylinder 342 is fixed on the flange 341, and the bottom surface of the internal fixed cylinder 342 is provided with an adjustment hole;

[0120] A T-shaped rod 343 is disposed in the fixed cylinder 342, and the bottom end of the T-shaped rod 343 passes through the adjustment hole of the fixed cylinder 342 and is connected to the top end of the pull rod 32;

[0121] The inner arc surface sleeve 344 is arranged between the T-shaped rod 343 and the fixed cylinder 342. A translation adjustment screw 345 is arranged on the inner arc surface sleeve 344. The translation adjustment screw 345 contacts the T-shaped rod 343. A hole 346 is opened on the fixed cylinder 342 at a position opposite to the translation adjustment screw 345. By inserting the adjustment rod into the hole 346 and rotating the translation adjustment screw 345, the translation adjustment of the T-shaped rod 343 is achieved, and the displacement adjustment on the horizontal plane is achieved. The contact surface between the inner arc surface sleeve 344 and the T-shaped rod 343 is an arc surface.

[0122] An angle adjustment top block 347 is also provided between the inner arc surface sleeve 344 and the fixed cylinder 342. An angle rotation top screw 348 is relatively provided on the fixed cylinder 342. The angle rotation top screw 348 is in contact with the angle adjustment top block 347. During the adjustment process, the angle rotation top screw 348 is rotated and the center is ensured to rotate through the concave-convex structure (arc surface), thereby realizing the verticality adjustment of the T-bar 343.

[0123] More specifically, in this embodiment, the fixed cylinder 342 is set to a circular structure, the outer shape of the inner arc surface sleeve 344 is set to a square, and the translation adjustment top screw 345, the angle adjustment top block 347 and the angle rotation top screw 348 are all set to four and arranged relatively. Through the above adjustment method, the displacement adjustment of the pull rod 32 in a small range in the horizontal direction and the vertical direction can be achieved, thereby ensuring the coaxiality between the pull rod 32 and the fixed rod 31, so that the pull rod 32 and the fixed rod 31 are on a vertical line to ensure the accuracy of the test data.

[0124] In another embodiment, the coaxiality adjustment mechanism 34 may be configured to include:

[0125] The fixed cylinder is hollow inside, and the bottom surface of the fixed cylinder is provided with an adjustment hole, and four limit grooves are relatively provided on the bottom surface of the fixed cylinder. An adjustment slider can be slidably provided in each limit groove, and four adjustment screws are relatively provided on the side wall of the fixed cylinder. The corresponding adjustment screws are connected with the adjustment slider, and the displacement adjustment of the corresponding adjustment slider can be achieved by rotating the corresponding screws; the T-shaped rod is arranged in the fixed cylinder, and the step surface of the T-shaped rod is in contact with the top surface of the adjustment slider. The slider bears the weight of the T-shaped rod, and the bottom end of the T-shaped rod passes through the fixed cylinder to connect the top end of the pull rod 32. During the adjustment process, the displacement adjustment of the T-shaped rod in the direction of the two screws is achieved by cooperating with each other, one is loosened and the other is tightened, thereby driving the pull rod to move and achieving displacement adjustment in the horizontal direction.

[0126] More specifically, in the process of adjusting the coaxiality, a standard coaxiality test bar is connected to the top end of the fixed rod 31 and the bottom end of the pull rod 32, a plurality of strain gauges are arranged on the coaxiality test bar at intervals, and the strain gauges are connected to a coaxiality measuring instrument. When the coaxiality between the pull rod 32 and the fixed rod 31 is adjusted by the coaxiality adjustment mechanism 34, the coaxiality measuring instrument can display the coaxiality between the two in real time to guide the coaxiality adjustment.

[0127] Furthermore, if Figure 8 As shown, the first heating mechanism 7 and the second heating mechanism 8 both include:

[0128] Two heating blocks 71 arranged opposite to each other can be rotatably arranged on the corresponding second position adjustment mechanism 9. The two heating blocks 71 can switch between an open state and a closed state under the action of a driving force. A groove 701 is arranged in the middle of the two heating blocks 71. In the closed state, the groove 701 in the middle of the two heating blocks 71 forms a receiving cavity for receiving a sample.

[0129] A measuring window 702 is provided on at least one heating block 71;

[0130] In the non-contact measurement mode, the measurement port of the non-contact measurement mechanism 4 is aligned with the measurement window 702 to measure the deformation of the sample during the stretching process through the measurement window 702;

[0131] In the contact measurement mode, the measuring head of the contact measurement mechanism 5 passes through the measuring window 702 to measure the deformation of the sample during the stretching process.

[0132] Specifically, in this embodiment, the first heating mechanism 7 and the second heating mechanism 8 have the same outer dimensions and can be set to a cylindrical or square structure according to actual use conditions. When set to a circular mechanism, the heating blocks 71 are all semicircular structures, and a groove 701 is provided inside. Since the heating blocks 71 can be rotatably arranged on the second position adjustment mechanism 9, the opening and closing of the two heating blocks 71 can be adjusted by external force. In the closed state, the groove 701 in the middle of the two heating blocks 71 forms a receiving cavity for accommodating the sample; and, in order to facilitate the measurement of the temperature and the deformation of the sample located in the receiving cavity during the test, a measuring window 702 is provided on at least one heating block 71, so that in the non-contact measurement mode, the measuring port of the non-contact measurement mechanism 4 is aligned with the measuring window 702 to measure the deformation of the sample during the stretching process through the measuring window 702; in the contact measurement mode, the measuring head of the contact measurement mechanism 5 passes through the measuring window 702 to measure the deformation of the sample during the stretching process. The opening position of the measuring window 702 on the first heating mechanism 7 and the second heating mechanism 8 can be determined according to actual conditions, and the size of the measuring window 702 can also be determined according to actual conditions. Preferably, grooves are provided at the edges of the two heating blocks 71 , which serve together as the measurement window 702 in a closed state.

[0133] Furthermore, if Fig. 9 As shown, the first position adjustment mechanism 6 includes:

[0134] A first slide rail 61 arranged vertically;

[0135] A first slider 62 is slidably disposed on the first slide rail 61. A positioning screw 621 is disposed on the first slider 62. The positioning screw 621 is rotated so that an end of the positioning screw 621 contacts the first slide rail 61, thereby fixing the first slider 62 on the first slide rail 61.

[0136] The connecting frame 63 has a rotating end that is rotatably connected to the second slider 92 . The non-contact measuring mechanism 4 and the contact measuring mechanism 5 are disposed at the corresponding free ends of the connecting frame 63 .

[0137] Specifically, in this embodiment, since the size of the tested sample may be different, in order to ensure that the deformation of the sample can be detected, and because there are different test modes, it is necessary to adjust the position height of the non-contact measuring mechanism 4 or the contact measuring mechanism 5, as well as to put in and cut out. A first slide rail 61 is vertically arranged on the two vertical support beams of the support frame 2, and a first slider 62 is slidably arranged on the first slide rail 61. The first slider 62 can move up and down along the first slide rail 61, and a positioning screw is arranged on the first slider 62 to fix the position of the slider. Nail 621, when external force is applied to the first slider 62 to make the first slider 62 move to a specified position, the end of the positioning screw 621 is contacted with the first slide rail 61 by tightening the positioning screw 621, thereby fixing the first slider 62 on the first slide rail 61; in addition, in order to avoid space obstruction caused by the non-contact measuring mechanism 4 or the contact measuring mechanism 5 when the sample is installed on the stretching mechanism 3, a connecting frame 63 is rotatably arranged on the second slider 92 through a bearing, and the non-contact measuring mechanism 4 and the contact measuring mechanism 5 are arranged at the free ends of the corresponding connecting frame 63. When the sample needs to be installed and removed, the connecting frame 63 is rotated so that the free end of the connecting frame 63 is rotated away from the supporting frame 2. After the installation is completed, when testing, the free end of the connecting frame 63 is rotated back to be close to the supporting frame 2, so that in the non-contact measurement mode, the measuring port of the non-contact measurement mechanism 4 is aligned with the measuring window 702 to measure the deformation of the sample during the stretching process through the measuring window 702; and in the contact measurement mode, the measuring head of the contact measurement mechanism 5 passes through the measuring window 702 to measure the deformation of the sample during the stretching process.

[0138] More specifically, since the measuring head of the contact measuring mechanism 5 needs to pass through the measuring window 702 to measure the deformation of the sample during the stretching process, in order to avoid the contact measuring mechanism 5 and the second heating mechanism 8 from rubbing against each other during the rotation of the connecting frame 63, the contact measuring mechanism 5 is retractably arranged at the free end of the connecting frame 63, so that after the connecting frame 63 moves into place, the contact measuring mechanism 5 is pushed into the measuring window 702. For example, when the contact measuring mechanism 5 is set as a deformation detection probe, the deformation detection probe is slidably arranged in the sleeve, and the deformation detection probe is retracted under external force.

[0139] Furthermore, if Fig.10 As shown, the second position adjustment mechanism 9 includes:

[0140] A second slide rail 91 is vertically arranged, a second slider 92 is slidably arranged on the second slide rail 91, and a gear 93 is arranged on the second slider 92;

[0141] A second driving mechanism 94 is disposed on the supporting frame 2, and a driving end of the second driving mechanism 94 is connected to the second slider 92 to generate a driving force to drive the second slider 92 to move;

[0142] A horizontally arranged connecting rod 95, wherein the rotating end of the connecting rod 95 is rotatably connected to the second sliding block 92, and the first heating mechanism 7 and the second heating mechanism 8 are arranged at the free ends of the corresponding connecting rod 95;

[0143] The driving motor 96 is disposed on the connecting rod 95 . The driving shaft of the driving motor 96 is meshedly connected with the gear 93 via a synchronous belt 97 . The driving motor 96 is used to generate a driving force to make the connecting rod 95 rotate relative to the second slider 92 .

[0144] Specifically, since the sizes of the tested samples may be different, in order to ensure that the samples can be heated accurately, and because there are different test modes, it is necessary to adjust the position height of the first heating mechanism 7 or the second heating mechanism 8, as well as to put in and cut out. A second slide rail 91 is vertically arranged on the two vertical support beams of the support frame 2, and a second slider 92 is slidably arranged on the second slide rail 91. The second slider 92 can move up and down along the second slide rail 91 under the driving force provided by the second driving mechanism 94, and a horizontally arranged connecting rod 95 is rotatably arranged on the second slider 92. The rotating end of the connecting rod 95 can rotate around the second slider 92. The first heating mechanism 7 and the second heating mechanism 8 are vertically arranged on the two vertical support beams of the support frame 2. The two heating mechanisms 8 are arranged at the free ends of the corresponding connecting rods 95. In order to adjust the rotation angle of the connecting rods 95, a driving motor 96 is arranged on each connecting rod 95. At the same time, a gear 93 is arranged on each second slider 92. The driving shaft of the driving motor 96 is meshed and connected with the gear 93 through a synchronous belt 97. Since the driving motor 96 is fixedly connected to the connecting rod 95, and the gear is also fixed on the second slider 92, when the driving motor 96 rotates, since the connecting rod 95 and the second slider 92 are rotatable, the connecting rod 95 can be rotated, thereby realizing the rotation angle adjustment of the first heating mechanism 7 and the second heating mechanism 8, that is, realizing input and output.

[0145] More specifically, a specific interlocking mechanism is provided between the second position adjustment mechanism 9 on which the first heating mechanism 7 and the second heating mechanism 8 are installed, thereby ensuring that the first heating mechanism 7 and the second heating mechanism 8 will not collide at all during the movement.

[0146] More specifically, in this solution, the connection method of each rotatable component is to achieve rotational connection through bearings, pin connections, etc.

[0147] Through the above-mentioned technical means, this solution can realize high-precision mechanical testing of micro specimens, solve the problem of not being able to obtain standard specimens for performance testing, meet the performance testing needs of micro specimens of different shapes and sizes, and improve the accuracy of mechanical performance testing of micro specimens; greatly improve the measurement accuracy of micro specimens, which is helpful to improve the accuracy of performance testing of micro specimens; the high-precision mechanical testing system has added automated parts to both the measurement and testing units, effectively improving the test efficiency and greatly reducing human errors; the high-precision mechanical testing system integrates original dimension measurement, temperature environment control, tensile test control, post-fracture dimension measurement and other functions related to performance testing, to achieve full-process micro specimen performance testing.

[0148] In addition, this solution also provides a tensile property test procedure for a micro specimen, so as to test the specimen in a non-contact measurement mode, including:

[0149] 1. System adjustment before test:

[0150] Turn on the system power, check whether each part functions normally, use the coaxiality testing device, and adjust the coaxiality of the high-precision test host to the best by adjusting the coaxiality adjustment system.

[0151] 2. Measurement of sample dimensions before testing:

[0152] The micro-sample is clamped and fixed by the clamping claws of the size measuring mechanism, and the mounting frame is moved to place the sample under the size measuring instrument. Click the "Start" button to automatically measure the size of the micro-sample. Rotate the fixture to the vertical direction, automatically measure the size of the micro-sample again, and calculate the average value.

[0153] 3. Heating:

[0154] The micro-sample is mounted on the stretching mechanism, the first heating mechanism is moved to a corresponding position, the first heating mechanism is turned on for heating and the infrared temperature measuring mechanism is turned on for temperature measurement;

[0155] 4. Test process:

[0156] After the temperature of the sample reaches the set target temperature, keep it warm for 30 minutes, move the non-contact measuring mechanism to the corresponding position, start the tensile test, and stop the test until the micro-specimen breaks.

[0157] 5. Measurement of sample dimensions after the test:

[0158] After waiting for the high temperature environment to drop to room temperature, remove the broken sample, clamp the micro sample with the clamping claws of the size measuring mechanism, splice the broken samples together by moving the slide rail, and move the mounting frame to place the sample under the size measuring instrument. Click the "Start" button to automatically measure the fracture size of the micro sample, rotate the fixture to the vertical direction, and automatically measure the fracture size of the micro sample again to calculate the average value.

[0159] 6. Fill in the report:

[0160] Fill in the corresponding test report based on the test data obtained to complete the test of the micro specimen.

[0161] The optional implementation modes of the embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details in the above implementation modes. Within the technical concept of the embodiments of the present invention, various simple modifications can be made to the technical scheme of the embodiments of the present invention, and these simple modifications all belong to the protection scope of the embodiments of the present invention.

[0162] Those skilled in the art can understand that all or part of the steps in the above-mentioned embodiments can be completed by instructing the relevant hardware through a program, and the program is stored in a storage medium, including several instructions for making a single-chip microcomputer, a chip or a processor (processor) perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0163] The optional embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details in the above embodiments. Within the technical concept of the embodiments of the present invention, the technical scheme of the embodiments of the present invention can be subjected to a variety of simple modifications, and these simple modifications all belong to the protection scope of the embodiments of the present invention. It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner when there is no contradiction. In order to avoid unnecessary repetition, the embodiments of the present invention will not further describe various possible combinations.

[0164] In addition, various implementations of the embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the embodiments of the present invention, they should also be regarded as the contents disclosed in the embodiments of the present invention.

Claims

1. A mechanical testing system, characterized in that: The system comprises: A dimension measuring mechanism (1) is used to measure the dimensions of the sample before and after stretching; A support frame (2), wherein a stretching mechanism (3) is arranged on the support frame (2), and the stretching mechanism (3) is used to carry a sample and apply a stretching force to the sample to perform a stretching test; The non-contact measuring mechanism (4) and the contact measuring mechanism (5) are arranged on the support frame (2) via corresponding first position adjustment mechanisms (6), and the spatial positions of the non-contact measuring mechanism (4) and the contact measuring mechanism (5) are adjusted by the corresponding first position adjustment mechanisms (6); in the non-contact measuring mode, the measuring port of the non-contact measuring mechanism (4) is aligned with the sample to measure the deformation of the sample during the stretching process; in the contact measuring mode, the measuring head of the contact measuring mechanism (5) is in contact with the sample to measure the deformation of the sample during the stretching process; The first heating mechanism (7) and the second heating mechanism (8) are relatively arranged on the support frame (2) through a corresponding second position adjustment mechanism (9), and the spatial positions of the first heating mechanism (7) and the second heating mechanism (8) are adjusted by the corresponding second position adjustment mechanism (9); the first heating mechanism (7) is used to heat the sample in a non-contact measurement mode, and the second heating mechanism (8) is used to heat the sample in a contact measurement mode; The controller (10) is connected to the dimension measuring mechanism (1), the stretching mechanism (3), the non-contact measuring mechanism (4), the contact measuring mechanism (5), the second position adjusting mechanism (9), the first heating mechanism (7) and the second heating mechanism (8), and is used to: control the stretching mechanism (3), the first heating mechanism (7), the non-contact measuring mechanism (4) and the corresponding second position adjusting mechanism (9) to work based on the non-contact measuring instruction; control the stretching mechanism (3), the second heating mechanism (8), the contact measuring mechanism (5) and the corresponding second position adjusting mechanism (9) to work based on the contact measuring instruction; and store the dimension information and the deformation amount information.

2. The mechanical testing system according to claim 1, characterized in that: The system further comprises: An infrared temperature measuring mechanism (20) is connected to the controller (10), and a temperature measuring port of the infrared temperature measuring mechanism (20) is aimed at the sample, and is used to measure the temperature value of the sample before stretching; The controller (10) is also used to store the temperature value.

3. The mechanical testing system according to claim 1, characterized in that: The dimension measuring mechanism (1) comprises: A carrying platform (11); A clamping mechanism (12), arranged on the bearing platform (11), for clamping the sample during the dimension measurement process; The dimension measuring instrument (13) is arranged on the supporting platform (11) and is used to measure the dimension information of the sample before and after stretching.

4. The mechanical testing system according to claim 3, characterized in that: The clamping mechanism (12) comprises: Two mounting frames (121) are slidably arranged on the bearing platform (11), and mounting plates (122) are rotatably arranged on the top ends of the two mounting frames (121); Clamping claws (123) are arranged opposite to each other, each clamping claw (123) is slidably arranged on the mounting plate (122) via a clamping slider (124), and the clamping slider (124) can slide on the mounting plate (122) under the action of a driving force, and the clamping claws (123) are used to clamp the sample; Each clamping slider (124) is provided with a tightening screw (125), and the clamping slider (124) is fixed on the mounting plate (122) by rotating the tightening screw (125) so that the end of the tightening screw (125) contacts the mounting plate (122).

5. The mechanical testing system according to claim 1, characterized in that: The stretching mechanism (3) comprises: A fixing rod (31) arranged on the supporting frame (2); A pull rod (32) is arranged on the support frame (2) through a moving mechanism (33); the pull rod (32) is located above the fixed rod (31); the bottom end of the fixed rod (31) and the top end of the pull rod (32) are used to connect the sample; and the moving mechanism (33) is used to generate a tensile force in the vertical direction.

6. The mechanical testing system according to claim 5, characterized in that: The motion mechanism (33) comprises: A crossbeam (331) is slidably arranged on the support frame (2) by means of a stretching slider (332); The first driving mechanism (333) is arranged on the supporting frame (2) and is used to generate a driving force to drive the stretching slider (332) to move.

7. The mechanical testing system according to claim 5, characterized in that: The pull rod (32) is also connected to the motion mechanism (33) via a coaxiality adjustment mechanism (34), and the coaxiality adjustment mechanism (34) is used to adjust the coaxiality between the pull rod (32) and the fixed rod (31).

8. The mechanical testing system according to claim 1, characterized in that: The first heating mechanism (7) and the second heating mechanism (8) both comprise: Two heating blocks (71) arranged opposite to each other can be rotatably arranged on the corresponding second position adjustment mechanism (9); the two heating blocks (71) can switch between an open state and a closed state under the action of a driving force; a groove (701) is arranged in the middle of the two heating blocks (71); in the closed state, the groove (701) in the middle of the two heating blocks (71) forms a receiving cavity for receiving a sample; A measuring window (702) is provided on at least one heating block (71); In the non-contact measurement mode, the measurement port of the non-contact measurement mechanism (4) is aligned with the measurement window (702) so as to measure the deformation of the sample during the stretching process through the measurement window (702); In the contact measurement mode, the measuring head of the contact measurement mechanism (5) passes through the measuring window (702) to measure the deformation of the sample during the stretching process.

9. The mechanical testing system according to claim 1, characterized in that: The first position adjustment mechanism (6) comprises: A first slide rail (61) arranged vertically; A first sliding block (62) is slidably disposed on the first sliding rail (61); a positioning screw (621) is disposed on the first sliding block (62); the first sliding block (62) is fixed on the first sliding rail (61) by rotating the positioning screw (621) so that the end of the positioning screw (621) contacts the first sliding rail (61); A connecting frame (63), the rotating end of which can be rotatably connected to a second slider (92), and a non-contact measuring mechanism (4) and a contact measuring mechanism (5) are arranged at the free ends of the corresponding connecting frame (63).

10. The mechanical testing system according to claim 1, characterized in that: The second position adjustment mechanism (9) comprises: A second slide rail (91) arranged vertically, a second slide block (92) being slidably arranged on the second slide rail (91), and a gear (93) being arranged on the second slide block (92); A second driving mechanism (94) is arranged on the supporting frame (2), and a driving end of the second driving mechanism (94) is connected to the second slider (92) and is used to generate a driving force to drive the second slider (92) to move; A connecting rod (95) arranged horizontally, wherein the rotating end of the connecting rod (95) is rotatably connected to the second sliding block (92), and the first heating mechanism (7) and the second heating mechanism (8) are arranged at the free ends of the corresponding connecting rod (95); A drive motor (96) is arranged on the connecting rod (95), and a drive shaft of the drive motor (96) is meshedly connected with the gear (93) via a synchronous belt (97). The drive motor (96) is used to generate a driving force to cause the connecting rod (95) to rotate relative to the second slider (92).

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