Stress testing device and method thereof

Abstract

The invention relates to the technical field of stress testing, in particular to a stress testing device and method and an adjusting mechanism, the stress testing device comprises a supporting plate, a fixing plate is arranged at the top of the supporting plate, an adjusting groove is formed in the fixing plate, a drilling machine is arranged on the surface of the adjusting groove, an adjusting block is arranged at the top of the drilling machine, and the adjusting block is arranged at the bottom of the supporting plate. The front side and the rear side of the adjusting block are in transmission connection through a screw, a driving motor is arranged on one side of the screw, and one side of the driving motor is fixedly connected with the outer side of the fixing plate, through arrangement of the testing mechanism, axial movement of the testing rod is achieved, the strain paste can cover the whole surface of the pipe fitting, stress data of different positions are dynamically captured, and the testing accuracy is improved. The position where drilling cannot be conducted due to poor stress is marked in real time in the testing process, damage caused by mismatching of the stress of the pipe fitting and the drilling force is avoided, the rotating plate and the pipe fitting can be driven to move synchronously through the arrangement of the rotating mechanism, and therefore the testing rod can test the stress of the pipe fittings at different angles.

Description

Technical Field

[0001] The present invention relates to the technical field of stress testing devices, and in particular to a stress testing device and a method thereof. Background Art

[0002] Stress testing devices are key equipment in industrial testing and materials science. They are used to measure the stress distribution and deformation characteristics of objects under stress. Therefore, after the Qin alloy welded pipe fittings are processed, their restraint stress usually needs to be tested. The existence of residual stress in the pipe fittings will affect the reliability and robustness of the pipe fittings themselves. Therefore, stress testing devices are needed to test the pipe fittings.

[0003] According to the technical effects of the existing technology and technical solutions, there are still areas that need to be optimized: the traditional stress detection device of pipe fittings can generally only perform stress detection in one direction of the pipe fittings during detection, resulting in incomplete test values, and when in use, it cannot be marked according to the stress distribution of the pipe fittings, which can easily cause damage to the pipe fittings during early drilling. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] In view of the above problems existing in the existing stress testing device, the present invention is proposed.

[0006] Therefore, an object of the present invention is to provide a stress testing device, the purpose of which is to test the stress distribution of a pipe at different angles.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: An adjustment mechanism, comprising a support plate, a fixing plate is arranged on the top of the support plate, an adjustment slot is opened inside the fixing plate, a drilling machine is arranged on the surface of the adjustment slot, an adjustment block is arranged on the top of the drilling machine, the front and rear sides of the adjustment block are connected by screw transmission, a drive motor is arranged on one side of the screw, and one side of the drive motor is fixedly connected to the outer side of the fixing plate; The rotating mechanism comprises a first push rod disposed at both ends of the right side of the fixed plate, a rotating ring is disposed on the right side of the first push rod, a placement plate is disposed on the right side of the rotating ring, a pipe is placed on the surface of the placement plate, and a clamping assembly is disposed on one side of the placement plate; and, A testing mechanism, which includes a fixed column arranged on the top of a support plate. A first motor is arranged on the left side of the fixed column. The output end of the first motor is drivingly connected to a rotating plate. A testing rod is arranged on the left side of the rotating plate. A strain gauge is arranged on the left side of the testing rod. One side of the strain gauge is in contact with the outer side of a pipe fitting. A marking component is arranged on the surface of the testing rod.

[0008] As a preferred embodiment of the stress testing device of the present invention, wherein: the clamping component includes a fixed seat arranged on one side of a placement plate. A second motor is arranged on one side of the fixed seat. The output end of the second motor is drivingly connected to an output rod. A rotating ring is arranged on one side of the output rod. A plurality of rotating rods are arranged on the front side of the rotating ring. The rear sides of the rotating rods are rotatably connected to clamping rods. The outer sides of the clamping rods penetrate through the outer side of a fixed box and are in contact with the inner wall of the pipe fitting. The fixed box is located inside the pipe fitting. One side of the fixed box is fixedly connected to the front side of the placement plate through a connecting rod. A semicircular groove is formed on the front side of the fixed box. The outer side of the connecting rod is in contact with the inner wall of the semicircular groove.

[0009] As a preferred embodiment of the stress testing device of the present invention, wherein: the marking component includes a marking box arranged on the surface of the testing rod. A marking ring is arranged on the surface of the marking box. A second push rod is arranged on one side of the marking ring. The second push rod is arranged on the right side of the marking box and its bottom is fixedly connected to the outer side of the testing rod.

[0010] As a preferred embodiment of the stress testing device of the present invention, wherein: a rotating groove is formed on the left side of the rotating ring. A rotating block is slidably connected to the surface of the rotating groove. The left side of the rotating block is drivingly connected to the output end of a first push rod.

[0011] As a preferred embodiment of the stress testing device of the present invention, wherein: the output end of the second motor is drivingly connected to a gear. A toothed plate is arranged on the left side of the gear. The rear side of the toothed plate is fixedly connected to the front side of a fixed plate.

[0012] As a preferred embodiment of the stress testing device of the present invention, wherein: a plurality of travel plates are arranged on the right side of the fixed plate. A travel groove is formed on the right side of each of the plurality of travel plates. The outer side of the rotating ring is slidably connected to the inner wall of the travel groove.

[0013] As a preferred embodiment of the stress testing device of the present invention, wherein: a plurality of sleeve rods are arranged on the right side of the rotating ring. A plugging groove is formed on the right side of each of the plurality of sleeve rods. A plugging rod is arranged on the inner wall of the plugging groove. The bottom of the plugging rod is fixedly connected to the top of the rotating plate.

[0014] As a preferred solution of the stress testing device described in the present invention, the following is provided: A third motor is provided on one side of the rotating plate. The output end of the third motor is drivingly connected to a lead screw. A driving block is drivingly connected to the surface of the lead screw. The left side of the driving block is fixedly connected to the right side of the testing rod.

[0015] Advantages of the present invention: Through the setting of the testing mechanism, the axial movement of the testing rod is realized, enabling the strain gauges to cover the entire surface of the pipe fitting, dynamically capturing stress data at different positions, and marking in real time during the testing process the positions where stress differences do not allow drilling, thus avoiding damage caused by the mismatch between the stress of the pipe fitting and the drilling force. Through the setting of the rotating mechanism, the synchronous movement of the rotating plate and the pipe fitting can be driven, so that the testing rod can test the stress of pipe fittings at different angles.

[0016] In view of the problems existing in the above-mentioned existing stress testing methods, the present invention is proposed.

[0017] Therefore, the object of the present invention is to provide a stress testing method, which aims to: test the stress distribution of pipe fittings at different angles.

[0018] To solve the above technical problems, the present invention provides the following technical solution: Place the pipe fitting on the top of the placement plate and test its stress through angle adjustment.

[0019] As a preferred solution of the stress testing method described in the present invention, the following is provided: The surface of the pipe fitting is marked by a marking component to facilitate the corresponding punching positions. When the first motor drives the rotating plate to rotate, it drives the pipe fitting to rotate synchronously, and the stress of different positions of the pipe fitting is tested by starting the third motor.

[0020] Advantages of the present invention: Through the setting of the testing mechanism, the first motor drives the rotating plate to drive the testing rod to surround the surface of the pipe fitting. Combining the transmission of the third motor and the lead screw, the axial movement of the testing rod is realized, enabling the strain gauges to cover the entire surface of the pipe fitting, dynamically capturing stress data at different positions, and through the clamping component, an internal clamping design is adopted. The second motor drives the rotating ring to drive the clamping rod to expand radially, tightly fitting the inner wall of the pipe fitting, and is suitable for stable fixation of different pipe diameters. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. Among them: Figure 1 It is a schematic diagram of the support plate, fixed plate and fixed column structures provided by the present invention.

[0022] Figure 2 For the present invention, Figure 1 Partial enlarged schematic view up to point A.

[0023] Figure 3 Exploded view of the adjustment mechanism provided by the present invention.

[0024] Figure 4 Exploded view of the rotating mechanism provided by the present invention.

[0025] Figure 5 Partial sectional view of the clamping assembly provided by the present invention.

[0026] Figure 6 Sectional view of the rotating plate provided by the present invention.

[0027] Figure 7 Sectional view of the test rod provided by the present invention.

[0028] Figure 8 Schematic view of the cooperation between the gear and the toothed plate provided by the present invention. Detailed implementation manners

[0029] To make the above objects, features and advantages of the present invention more obvious and understandable, the following detailed description of the specific implementation manners of the present invention will be given in conjunction with the accompanying drawings of the specification.

[0030] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar generalizations without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0031] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure or characteristic that may be included in at least one implementation manner of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0032] Furthermore, the present invention will be described in detail with reference to the schematic diagrams. When describing the embodiments of the present invention in detail, for the convenience of explanation, the cross-sectional views showing the device structure will be enlarged locally out of the general scale, and the schematic diagrams are only examples and should not limit the scope of protection of the present invention herein. In addition, in actual production, three-dimensional spatial dimensions including length, width and depth should be included.

[0033] Embodiment 1

[0034] Refer to Figures 1-8, which is the first embodiment of the present invention, provides a stress testing method. It realizes placing the pipe fitting 204 on the top of the placement plate 203 and performing stress testing on it by adjusting the angle. The surface of the pipe fitting 204 is marked by the marking component 306 to facilitate the corresponding punching positions. When the first motor 302 drives the rotating plate 303 to rotate, it drives the pipe fitting 204 to rotate synchronously, and the stress testing of different positions of the pipe fitting 204 is started by the third motor 410. By using the first push rod 201, the rotating ring 202 can be driven to move to the left and right sides. When moving to the right side, it is marked by the marking ring 306b, so as to achieve real-time testing of the stress data on the entire surface of the pipe fitting 204 and mark it, avoiding damage caused by the mismatch between the stress of the pipe fitting 204 and the drilling force.

[0035] Embodiment 2

[0036] Refer to Figures 1-5 , 8, which is the second embodiment of the present invention, provides a rotating mechanism 200 to realize the rotation of the pipe fitting 204.

[0037] Specifically, the adjusting mechanism 100 includes a support plate 101. At the top of the support plate 101, a fixing plate 102 is provided. An adjusting groove 103 is formed inside the fixing plate 102. On the surface of the adjusting groove 103, a drilling machine 104 is provided. At the top of the drilling machine 104, an adjusting block 105 is provided. Both the front and rear sides of the adjusting block 105 are connected by a screw rod 106 in a transmission manner. On one side of the screw rod 106, a driving motor 107 is provided. One side of the driving motor 107 is fixedly connected to the outer side of the fixing plate 102; the rotating mechanism 200 includes first push rods 201 provided at both ends on the right side of the fixing plate 102. On the right side of the first push rod 201, a rotating ring 202 is provided. On the right side of the rotating ring 202, a placing plate 203 is provided. A pipe fitting 204 is placed on the surface of the placing plate 203. On one side of the placing plate 203, a clamping assembly 205 is provided; the clamping assembly 205 includes a fixed seat 205a provided on one side of the placing plate 203. On one side of the fixed seat 205a, a second motor 205b is provided. The output end of the second motor 205b is connected in a transmission manner with an output rod 205c. On one side of the output rod 205c, a rotating ring 205d is provided. On the front side of the rotating ring 205d, a plurality of rotating rods 205e are provided. The rear sides of the rotating rods 205e are all rotatably connected with clamping rods 205f. The outer sides of the clamping rods 205f penetrate through the outer side of a fixed box 205g and are in contact with the inner wall of the pipe fitting 204. The fixed box 205g is located inside the pipe fitting 204. One side of the fixed box 205g is fixedly connected to the front side of the placing plate 203 through a connecting rod 205h. A semi-circular groove 205i is formed on the front side of the fixed box 205g. The outer side of the connecting rod 205h is in contact with the inner wall of the semi-circular groove 205i; a rotating groove 401 is formed on the left side of the rotating ring 202. On the surface of the rotating groove 401, a rotating block 402 is slidably connected. The left side of the rotating block 402 is connected to the output end of the first push rod 201 in a transmission manner; the output end of the second motor 205b is connected in a transmission manner with a gear 403. On the left side of the gear 403, a toothed plate 404 is provided. The rear side of the toothed plate 404 is fixedly connected to the front side of the fixing plate 102; a plurality of travel plates 405 are provided on the right side of the fixing plate 102. A travel groove 406 is formed on the right side of each of the plurality of travel plates 405. The outer side of the rotating ring 202 is slidably connected to the inner wall of the travel groove 406; a plurality of sleeve rods 407 are provided on the right side of the rotating ring 202. A plugging groove 408 is formed on the right side of each of the plurality of sleeve rods 407. On the inner wall of the plugging groove 408, a plugging rod 409 is provided. The bottom of the plugging rod 409 is fixedly connected to the top of a rotating plate 303.

[0038] Specifically, start the first push rod 201 to push the rotating block 402 to slide along the rotating groove 401 on the left side of the rotating ring 202, driving the rotating ring 202 to rotate. The sleeve rod 407 on the right side of the rotating ring 202 is plugged with the plugging rod 409 through the plugging groove 408, so that the rotating plate 303 can drive the rotating ring 202 to rotate synchronously, ensuring the consistency of the contact angle between the test rod 304 and the surface of the pipe fitting 204.

[0039] Further, by starting the second motor 205b, the output rod 205c drives the rotary ring 205d to rotate, and multiple rotary rods 205e on the rotary ring 205d rotate accordingly, pushing the clamping rods 205f hinged at the rear side to expand radially outwards. The anti-slip rubber layer at the front end of the clamping rod 205f closely fits the inner wall of the pipe fitting 204, forming a self-centering clamp. This design can avoid damaging the inner surface of the pipe fitting 204. After the clamping is completed, the rotating mechanism 200 starts to act. The first push rods 201 on both sides of the fixed plate 102 extend synchronously, pushing the rotating block 402 to move, and using the movement of the rotating block 402 to squeeze the rotating groove 401 to make the rotating ring 202 move, so that the rotating ring 202 moves on the inner wall of the stroke groove 406. By running the first motor 302, the rotating plate 303 can be driven to rotate. Since the sleeve rod 407 on the right side of the rotating ring 202 is connected to the insertion rod 409 of the rotating plate 303 through the insertion groove 408, and the rotating groove 401 is connected to the output end of the first push rod 201 through the rotating block 402, when the rotating plate 303 rotates, the rotating ring 202 can be driven to rotate at the same time, making the rotating plate 303 and the pipe fitting 204 rotate synchronously, ensuring the consistency of the stress at different angles of the test pipe fitting 204.

[0040] It should be noted that the lateral stroke of the stroke groove 406 is equal to the lateral distance that the rotating ring 202 can move; the front end of the clamping rod 205f is made of anti-slip rubber layer material.

[0041] Embodiment 3

[0042] Refer to Figure 1 、 6 Figures 7 and 8, which are the third embodiment of the present invention, provide a testing mechanism 300 for marking the surface of the pipe fitting 204.

[0043] The testing mechanism 300 includes a fixing column 301 arranged on the top of the support plate 101. A first motor 302 is arranged on the left side of the fixing column 301. The output end of the first motor 302 is drivingly connected with a rotating plate 303. A testing rod 304 is arranged on the left side of the rotating plate 303. A strain gauge 305 is arranged on the left side of the testing rod 304. One side of the strain gauge 305 is in contact with the outer side of the pipe fitting 204. A marking assembly 306 is arranged on the surface of the testing rod 304; The marking assembly 306 includes a marking box 306a arranged on the surface of the testing rod 304. A marking ring 306b is arranged on the surface of the marking box 306a. A second push rod 306c is arranged on one side of the marking ring 306b. The second push rod 306c is arranged on the right side of the marking box 306a and its bottom is fixedly connected with the outer side of the testing rod 304; A third motor 410 is arranged on one side of the rotating plate 303. The output end of the third motor 410 is drivingly connected with a lead screw 411. A transmission block 412 is drivingly connected with the surface of the lead screw 411. The left side of the transmission block 412 is fixedly connected with the right side of the testing rod 304.

[0044] Specifically, the third motor 410 drives the lead screw 411 to rotate, driving the transmission block 412 and the testing rod 304 to move axially along the pipe fitting 204, so that the strain gauge 305 on the testing rod 304 continuously contacts the surface of the pipe fitting 204, and circumferential stress data is collected in real time. When the strain gauge 305 completes the test at a certain point, the second push rod 306c pushes the marking ring 306b to apply pressure to the surface of the pipe fitting 204, and the quick-drying ink in the marking box 306a prints a marking point through the micropores of the marking ring 306b. The marking color is graded according to the stress value. For example, red represents the drillable area, and no marking is made in the non-drillable area.

[0045] Furthermore, the start of the third motor 410 drives the lead screw 411 to rotate, and the rotation of the lead screw 411 can drive the transmission block 412 to reciprocate inside the rotating plate 303, so that the strain gauge 305 on the left side of the testing rod 304 contacts different positions on the outer surface of the pipe fitting 204, and transverse stress data is collected in real time; During the test, if the stress on the surface of the pipe fitting 204 is suitable for drilling, it is transmitted to the controller through the sensor and the second push rod 306c is started, so that the marking ring 306b is pushed against the surface of the pipe fitting 204, and the quick-drying ink in the marking box 306a forms a marking point on the pipe fitting 204, otherwise no marking is made.

[0046] It should be noted that when the pipe fitting is subjected to strain testing, the gear 403 and the toothed plate 404 are in a disengaged state, and the end of the toothed plate 404 is flush with the side wall of the rotating ring 202; When and after the strain gauge completes the detection of the fixed circumferential position, the pipe fitting is rotated by the rotation of the second motor 205b, so as to realize the stress detection of all circumferential positions of the pipe fitting. After the detection is completed, the connecting rod 205h is rotated back to the bottom of the semi-circular groove 205i by the rotation of the second motor 205b again.

[0047] The remaining structure is the same as that of Embodiment 2.

[0048] Embodiment 4

[0049] Refer to Figures 1-8 , which is the fourth embodiment of the present invention. The difference between this embodiment and the third embodiment is that this embodiment provides a stress testing device.

[0050] When using this stress testing device; First, place the pipe fitting 204 on the top of the placement plate 203. By starting the second motor 205b, the output rod 205c drives the rotating ring 205d to rotate. Multiple rotating rods 205e on the rotating ring 205d rotate accordingly, pushing the clamping rods 205f hinged at the rear to expand radially outward. The anti-slip rubber layer at the front end of the clamping rods 205f closely adheres to the inner wall of the pipe fitting 204, forming self-centering clamping. This design can avoid damaging the inner surface of the pipe fitting 204; after clamping, the rotating mechanism 200 starts to act. The first push rods 201 on both sides of the fixed plate 102 extend synchronously, pushing the rotating block 402 to move, and using the movement of the rotating block 402 to squeeze the rotating groove 401 to make the rotating ring 202 move, so that the rotating ring 202 moves on the inner wall of the stroke groove 406. Since a semi-circular groove 205i is opened on the outer side of the fixed box 205g, and the outer side of the connecting rod 205h is in contact with the inner wall of the semi-circular groove 205i and is fixedly connected to the outer side of the placement plate 203, when the clamping rods 205f expand outward, the fixed box 205g will be restricted by the connecting rod 205h and will not rotate, ensuring the stable clamping of the clamping rods 205f; When the pipe fitting 204 is pushed to contact the strain gauge 305, starting the third motor 410 drives the lead screw 411 to rotate, and the rotation of the lead screw 411 can drive the transmission block 412 to reciprocate inside the inner wall of the rotating plate 303, so that the strain gauge 305 on the left side of the test rod 304 contacts different positions on the outer surface of the pipe fitting 204, and the transverse stress data is collected in real time; During the test, if the stress on the surface of the pipe fitting 204 is suitable for punching, it is transmitted to the controller through the sensor and the second push rod 306c is started, so that the pushing marking ring 306b presses against the surface of the pipe fitting 204, and the quick-drying ink in the marking box 306a forms marking points on the pipe fitting 204, otherwise no marking is performed; After the first push rod 201 is reset after the marking is completed, and during the movement of the rotating ring 202, the gear 403 will be engaged with the toothed plate 404, so that the fixed box 205g rotates following the rotation of the gear 403. Since the clamping rod 205f is in a state of clamping the pipe fitting 204, the pipe fitting 204 will also rotate accordingly when the fixed box 205g rotates. Since the connecting rod 205h is located on the inner wall of the semi-circular groove 205i, the semi-circular groove 205i will rotate synchronously when the fixed box 205g rotates, so that the connecting rod 205h is located at the other end of the semi-circular groove 205i, which is used to ensure that the fixed box 205g can drive the pipe fitting 204 to rotate stably; conversely, the connecting rod 205h is located at the other end of the semi-circular groove 205i. When it is necessary to test the stress of the pipe fitting 204 at different angles, by restarting the first push rod 201, the pipe fitting 204 is brought into contact with the strain gauge 305 again, and the rotation of the rotating plate 303 can be driven by the operation of the first motor 302. Since the sleeve rod 407 on the right side of the rotating ring 202 is connected to the insertion rod 409 of the rotating plate 303 through the insertion groove 408, and the rotating groove 401 is connected to the output end of the first push rod 201 through the rotating block 402, when the rotating plate 303 rotates, the rotating ring 202 can be driven to rotate at the same time, so that the rotating plate 303 and the pipe fitting 204 rotate synchronously, ensuring the consistency of the stress test of the pipe fitting 204 at different angles.

[0051] In summary: The degree of meshing and moving of the gear 403 and the toothed plate 404 is about 90 degrees, and the moving and rotating degrees are the same; the inside of the marking ring 306b is marked with quick-drying ink.

[0052] Importantly, it should be noted that the construction and arrangement of the present application shown in multiple different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who refer to this disclosure should easily understand that many modifications are possible without substantially departing from the novel aspects and advantages of the subject matter described in this application. For example, the dimensions, scales, structures, shapes and proportions of various elements, as well as parameter values such as temperature, pressure, etc., installation arrangements, use of materials, changes in color, orientation, etc. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the element may be inverted or otherwise changed, and the nature, number or position of discrete elements may be altered or changed. Therefore, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "means-plus-function" clause is intended to cover the structures that perform the functions described herein, and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present invention. Therefore, the present invention is not limited to specific embodiments, but extends to various modifications that still fall within the scope of the appended claims. In addition, in order to provide a concise description of the exemplary embodiments, not all features of the actual embodiments may be described, that is, those features that are not relevant to the currently considered best mode of implementing the present invention, or those features that are not relevant to implementing the present invention.

[0053] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A stress testing device, characterized in that: An adjustment mechanism (100) comprises a support plate (101), a fixing plate (102) being arranged on the top of the support plate (101), an adjustment slot (103) being provided inside the fixing plate (102), a drilling machine (104) being arranged on the surface of the adjustment slot (103), an adjustment block (105) being arranged on the top of the drilling machine (104), front and rear sides of the adjustment block (105) being connected by transmission via a screw rod (106), a drive motor (107) being arranged on one side of the screw rod (106), and one side of the drive motor (107) being fixedly connected to the outer side of the fixing plate (102); A rotating mechanism (200) comprising a first push rod (201) arranged at two ends of the right side of a fixed plate (102), a rotating ring (202) being arranged on the right side of the first push rod (201), a placement plate (203) being arranged on the right side of the rotating ring (202), a pipe (204) being placed on the surface of the placement plate (203), and a clamping assembly (205) being arranged on one side of the placement plate (203); and, A testing mechanism (300) comprises a fixed column (301) arranged on the top of a support plate (101); a first motor (302) is arranged on the left side of the fixed column (301); an output end of the first motor (302) is drivingly connected to a rotating plate (303); a testing rod (304) is arranged on the left side of the rotating plate (303); a strain sticker (305) is arranged on the left side of the testing rod (304); one side of the strain sticker (305) is in contact with the outer side of a pipe (204); and a labeling component (306) is arranged on the surface of the testing rod (304).

2. The stress testing device according to claim 1, characterized in that: The clamping assembly (205) comprises a fixing seat (205a) arranged on one side of the placement plate (203); a second motor (205b) is arranged on one side of the fixing seat (205a); an output end of the second motor (205b) is transmission-connected to an output rod (205c); a rotating ring (205d) is arranged on one side of the output rod (205c); a plurality of rotating rods (205e) are arranged on the front side of the rotating ring (205d); and a clamping member (205e) is rotationally connected to the rear side of each rotating rod (205e). Rod (205f), the outer side of the clamping rod (205f) passes through the outer side of the fixing box (205g) and contacts the inner wall of the pipe (204), the fixing box (205g) is located inside the pipe (204), one side of the fixing box (205g) is fixedly connected to the front side of the placement plate (203) through a connecting rod (205h), a semicircular groove (205i) is provided on the front side of the fixing box (205g), and the outer side of the connecting rod (205h) contacts the inner wall of the semicircular groove (205i).

3. The stress testing device according to claim 1 or 2, characterized in that: The labeling assembly (306) comprises a labeling box (306a) arranged on the surface of the test rod (304); a labeling ring (306b) is arranged on the surface of the labeling box (306a); a second push rod (306c) is arranged on one side of the labeling ring (306b); the second push rod (306c) is arranged on the right side of the labeling box (306a) and the bottom of the second push rod is fixedly connected to the outer side of the test rod (304).

4. The stress testing device according to claim 3, characterized in that: A rotating groove (401) is provided on the left side of the rotating ring (202), a rotating block (402) is slidably connected to the surface of the rotating groove (401), and the left side of the rotating block (402) is drivingly connected to the output end of the first push rod (201).

5. The stress testing device according to claim 2, characterized in that: The output end of the second motor (205b) is drivingly connected to a gear (403), a toothed plate (404) is provided on the left side of the gear (403), and the rear side of the toothed plate (404) is fixedly connected to the front side of the fixed plate (102).

6. The stress testing device according to claim 5, characterized in that: A plurality of travel plates (405) are provided on the right side of the fixed plate (102), a travel groove (406) is provided on the right side of the plurality of travel plates (405), and the outer side of the rotating ring (202) is slidably connected to the inner wall of the travel groove (406).

7. The stress testing device according to claim 6, characterized in that: A plurality of sleeve rods (407) are provided on the right side of the rotating ring (202), a plug-in slot (408) is provided on the right side of the plurality of sleeve rods (407), a plug-in rod (409) is provided on the inner wall of the plug-in slot (408), and the bottom of the plug-in rod (409) is fixedly connected to the top of the rotating plate (303).

8. The stress testing device according to claim 7, characterized in that: A third motor (410) is provided on one side of the rotating plate (303); an output end of the third motor (410) is transmission-connected to a lead screw (411); a surface of the lead screw (411) is transmission-connected to a transmission block (412); and a left side of the transmission block (412) is fixedly connected to a right side of the test rod (304).

9. A stress testing method, characterized in that: The stress testing device according to any one of claims 1 to 8 further comprises: The pipe fitting (204) is placed on the top of the placement plate (203) and stress tested by adjusting the angle.

10. The stress testing method according to claim 9, characterized in that: The surface of the pipe (204) is marked by a marking assembly (306) to facilitate the corresponding punching position. When the first motor (302) drives the rotating plate (303) to rotate, the pipe (204) is driven to rotate synchronously, and the third motor (410) is started to perform stress testing on different positions of the pipe (204).

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