Ultrasonic residual stress detection tool clamp

Abstract

The utility model relates to the technical field of ultrasonic detection, and discloses an ultrasonic residual stress detection tool clamp, which comprises a bottom plate, an ultrasonic residual stress detection tool clamp, an ultrasonic residual stress detection tool clamp and an ultrasonic residual stress detection tool clamp, and is characterized in that the bottom plate is provided with a horizontal mounting surface; the brackets are vertically arranged on the mounting surface of the bottom plate, and the number of the brackets is two; the detection assembly is arranged on the surface of the detected material and is used for carrying out ultrasonic residual stress detection on the detected material; the vertical driving component is installed on the support, the moving end of the vertical driving component is connected with an abutting component, and the abutting component abuts against the detection component to the surface of a detected material through driving of the vertical driving component. The ultrasonic residual stress detection tool clamp aims at solving the problem that the complexity of operation steps is increased due to the fact that a plurality of clamps are used in cooperation.

Description

Technical Field

[0001] This utility model relates to the field of ultrasonic testing technology, specifically to an ultrasonic residual stress testing fixture. Background Technology

[0002] In the prior art, some metal workpieces are stress-relieved during the production process by tempering. However, due to factors such as the size and shape of the workpiece, the tempering time and temperature vary for different workpieces. In order to ensure the quality of the workpiece, a residual stress detection process is required. This detection process requires a stress detection fixture.

[0003] In existing technologies, when using ultrasound to detect residual stress, the ultrasonic transducer needs to be fixed on a wedge, the wedge carrying the transducer is then placed on the material to be tested, and finally the two are fixed together on a table. During the fixing process, it is necessary to ensure that the wedge and the material to be tested are in close contact, and that the material to be tested is stable on the table without shaking. Multiple clamps are required for coordinated fixing. The use of multiple clamps not only increases the complexity of operation and prolongs the test preparation time, but also easily leads to gaps or relative displacement between the wedge and the material to be tested due to uneven force applied by each clamp. This can interfere with the ultrasonic wave propagation path, cause distortion of the test signal, and affect the accuracy of the residual stress test results. Utility Model Content

[0004] The purpose of this invention is to solve the problem that the use of multiple fixtures increases the complexity of the operation steps, and to propose an ultrasonic residual stress detection fixture.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0006] An ultrasonic residual stress testing fixture, comprising:

[0007] The base plate has a horizontal mounting surface for supporting the material being tested;

[0008] The brackets are vertically mounted on the mounting surface of the base plate, and there are two of them.

[0009] The detection component is placed on the surface of the material being tested and is used to perform ultrasonic residual stress detection on the material being tested.

[0010] A vertical driving component is mounted on the bracket. The moving end of the vertical driving component is connected to an abutment component. Driven by the vertical driving component, the abutment component presses the detection component against the surface of the material being tested.

[0011] A fixing member is disposed on the abutting component. During the downward movement of the abutting component, the fixing member presses down to fix the material being tested.

[0012] Based on the above technical solution, the present invention can be further improved as follows.

[0013] Furthermore, the support includes:

[0014] Vertical rods are installed vertically on the mounting surface of the base plate. The vertical rods are arranged in pairs, and there are two sets in total.

[0015] A connecting part is fixedly installed on the end of the vertical rod away from the mounting surface of the base plate. Each group of vertical rods is provided with one connecting part, which is used to connect and fix two vertical rods in each group.

[0016] Furthermore, at least two guide grooves are provided on the mounting surface of the base plate, and a sliding part adapted to the guide groove is provided at the bottom end of the vertical rod. The sliding part and the guide groove are slidably connected, and the bracket is adjusted in position by sliding the sliding part in the guide groove.

[0017] Furthermore, the detection component includes:

[0018] Two wedge-shaped blocks are attached to the surface of the material being tested.

[0019] Ultrasonic transducers are respectively embedded in the wedge-shaped blocks. One of the ultrasonic transducers is connected to the detection system to emit ultrasonic waves, and the other ultrasonic transducer is connected to the detection system to receive ultrasonic waves and convert them into electrical signals.

[0020] Furthermore, the vertical driving component is an electric push rod, with the fixed end of the electric push rod fixedly installed at the axis of the connecting part, and the output end of the electric push rod facing the mounting surface of the base plate and connected to the abutment component.

[0021] Furthermore, the abutment component includes:

[0022] A connecting plate is fixedly connected to the moving end of the vertical driving component and is arranged parallel to the base plate;

[0023] A buffer element is disposed on the side of the connecting plate facing the base plate;

[0024] An elastic contact layer is disposed between the buffer element and the wedge block. One side surface of the elastic contact layer is connected to the buffer element, and the other side surface is used to form an elastic contact with the wedge block.

[0025] Furthermore, the fixing member includes:

[0026] A guide sleeve vertically penetrates the connecting plate and is fixedly connected to it;

[0027] An elastic element is disposed inside the guide sleeve, and its first end is fixedly connected to the inner wall of the guide sleeve;

[0028] A piston component is disposed inside the guide sleeve and fixedly connected to the second end of the elastic element, and the piston component and the guide sleeve form a sliding fit;

[0029] A connecting rod, the first end of which is fixedly connected to the piston member, and the second end which passes through the guide sleeve and extends to the outside;

[0030] A fixed pressure head is located at the second end of the connecting rod.

[0031] Furthermore, an elastic abutment airbag is provided on the side of the fixed pressure head away from the connecting rod. Both the connecting rod and the piston are provided with interconnected air passages. An air storage chamber is formed inside the elastic abutment airbag. The air storage chamber is connected to the air passages through a connecting pipe to form a fluid passage.

[0032] Furthermore, the outer surface of the elastic contact airbag is provided with an anti-slip contact layer, which is made of an elastic material with a coefficient of friction of not less than 0.5.

[0033] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0034] This fixture features a base plate, whose horizontal mounting surface provides a stable and flat bearing foundation for the material being tested, ensuring that the material is placed horizontally. The detection component acts directly on the surface of the material, and the vertical drive component precisely adjusts the contact force to ensure a tight fit between the detection component and the material, thereby guaranteeing the stability of the ultrasonic wave propagation path and preventing signal distortion. Furthermore, a fixing component is mounted on the contact component, simultaneously pressing down on and fixing the material as the contact component moves downwards. This achieves simultaneous pressing by the detection component and fixing of the material, overcoming the uneven force application that occurs when multiple fixtures are used together. This not only simplifies the operation process and shortens the test preparation time but also avoids gaps or relative displacement caused by uneven force application from different fixtures, effectively improving the accuracy of residual stress test results. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the overall connection structure of this utility model;

[0036] Figure 2 This utility model Figure 1 Enlarged view of point A in the middle;

[0037] Figure 3 This is a schematic diagram of the connection structure of the fixing component of this utility model;

[0038] Figure 4 This is a schematic diagram of the explosive connection structure of the airway and connecting tube, fixed pressure head and elastic abutment airbag of this utility model.

[0039] In the diagram: 1. Base plate; 2. Support; 21. Vertical rod; 22. Connecting part; 3. Detection component; 31. Wedge block; 32. Ultrasonic transducer; 4. Vertical driving component; 5. Abutment component; 51. Connecting plate; 52. Buffer element; 53. Elastic contact layer; 6. Fixing component; 61. Guide sleeve; 62. Elastic element; 63. Piston; 64. Connecting rod; 65. Fixed pressure head; 7. Guide groove; 8. Elastic abutment airbag; 9. Air passage; 10. Connecting pipe; 11. Anti-slip contact layer. Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0041] Combination Figures 1-4 As shown, the ultrasonic residual stress testing fixture of this utility model includes:

[0042] The base plate 1 has a horizontal mounting surface for supporting the material being tested;

[0043] Bracket 2, vertically mounted on the mounting surface of base plate 1, two in number;

[0044] The detection component 3 is placed on the surface of the material being tested and is used to perform ultrasonic residual stress detection on the material being tested.

[0045] The vertical driving component 4 is installed on the bracket 2. The moving end of the vertical driving component 4 is connected to the abutment component 5. Through the driving of the vertical driving component 4, the abutment component 5 presses the detection component 3 against the surface of the material to be tested.

[0046] The fixing component 6 is disposed on the abutment component 5. During the downward movement of the abutment component 5, the fixing component 6 fixes the material being tested by pressing down.

[0047] First, the material to be tested is placed on the horizontal mounting surface of the base plate 1. The stable bearing surface provided by the base plate 1 ensures the material is in a stable state. Next, the detection component 3 is placed on the surface of the material, ready for ultrasonic residual stress testing. At this time, the vertical driving component 4 mounted on the bracket 2 begins to operate. Since the moving end of the vertical driving component 4 is connected to the abutment component 5, when the vertical driving component 4 is driven, it can drive the abutment component 5 to move downwards in the vertical direction. During the movement, the abutment component 5 gradually presses the detection component 3 against the surface of the material to be tested, ensuring a tight fit between the detection component 3 and the material, providing conditions for stable ultrasonic wave propagation. Meanwhile, the fixing component 6, set on the abutment component 5, presses down synchronously as the abutment component 5 moves downwards, applying pressure to the material to be tested and firmly fixing it to the base plate 1. In this way, during the testing process, both the fit between the detection component 3 and the material to be tested is ensured, and reliable fixation of the material to be tested is achieved, avoiding relative displacement or gaps, thus ensuring that the ultrasonic residual stress testing can be carried out smoothly and accurately.

[0048] In a preferred embodiment, this utility model can be further configured as follows: Figure 1 As shown; the bracket 2 includes:

[0049] The vertical rod 21 is installed vertically on the mounting surface of the base plate 1. The vertical rod 21 is set in pairs, and there are two sets in total.

[0050] The connecting part 22 is fixedly installed on the end of the vertical rod 21 away from the mounting surface of the base plate 1. Each group of vertical rods 21 is provided with a corresponding connecting part 22. The connecting part 22 is used to connect and fix the two vertical rods 21 in each group. The vertical rods 21 are installed vertically on the mounting surface of the base plate 1, and two groups are set in pairs. This arrangement provides a stable bottom support structure for the entire bracket 2. Each group of vertical rods 21 is provided with a corresponding connecting part 22. Its main function is to connect and fix the two vertical rods 21 in each group together. In this way, the two groups of vertical rods 21 form a stable frame structure through the connecting part 22, which enhances the overall rigidity and stability of the bracket 2.

[0051] In a preferred embodiment, this utility model can be further configured as follows: Figure 1As shown; at least two guide grooves 7 are provided on the mounting surface of the base plate 1. The bottom end of the vertical rod 21 is provided with a sliding part that matches the guide groove 7. The sliding part and the guide groove 7 form a sliding connection. The bracket 2 adjusts its position by sliding the sliding part in the guide groove 7. When facing materials of different volumes and shapes, the operator can flexibly change the distance and relative position between the two brackets 2 according to actual needs by sliding the bracket 2 in the guide groove 7, so as to adapt to materials of different specifications. This allows the detection component 3, the abutment component 5 and the fixing component 6 to accurately act on the appropriate detection position of the material. Furthermore, the cooperation between the sliding part and the guide groove 7 is the same as the sliding part on the manual knife in the prior art. After the bracket 2 is slid to the designated position, the sliding part can be locked, thereby ensuring that the bracket 2 is stable and does not move during the detection process.

[0052] In a preferred embodiment, this utility model can be further configured as follows: Figure 1 , Figure 2 As shown; Detection component 3 includes:

[0053] Two wedge blocks 31 are attached to the surface of the material being tested.

[0054] Ultrasonic transducers 32 are embedded in wedge blocks 31. One ultrasonic transducer 32 is connected to the detection system to emit ultrasonic waves, and the other ultrasonic transducer 32 is connected to the detection system to receive ultrasonic waves and convert them into electrical signals. During ultrasonic residual stress detection, the two wedge blocks 31 are fitted to the surface of the material under test. This fitted design ensures good acoustic coupling between the ultrasonic transducers 32 and the material under test, reducing energy loss and interference during ultrasonic wave propagation. One of the ultrasonic transducers 32 embedded in the wedge block 31 is connected to the detection system and is responsible for emitting ultrasonic waves, which pass through the wedge block 31 and enter the interior of the material under test. The other ultrasonic transducer 32 is also connected to the detection system to receive ultrasonic waves reflected from the material under test and convert them into electrical signals. Since the residual stress inside the material under test affects the propagation speed, direction, and other characteristics of ultrasonic waves, the detection system can deduce the residual stress inside the material under test by analyzing the ultrasonic wave propagation information contained in the received electrical signals, thereby realizing the residual stress detection of the material under test.

[0055] In a preferred embodiment, this utility model can be further configured as follows: Figure 1 , Figure 2As shown; the vertical driving component 4 is an electric push rod. The fixed end of the electric push rod is fixedly installed at the axis of the connecting part 22. The output end of the electric push rod faces the mounting surface of the base plate 1 and is connected to the abutment component 5. The vertical driving component 4 is an electric push rod, and its fixed end is firmly fixedly installed at the axis of the connecting part 22. This provides a stable support foundation for the electric push rod, ensuring that it will not shake or deviate during operation. The output end of the electric push rod faces the mounting surface of the base plate 1 and is connected to the abutment component 5. When it is necessary to press the detection component 3 against the surface of the material to be tested, the electric push rod is powered on and started. The output end of the electric push rod will move downward in a straight line along the vertical direction, thereby driving the abutment component 5 connected to it to move downward synchronously.

[0056] In a preferred embodiment, this utility model can be further configured as follows: Figure 2 , Figure 3 As shown; the abutment component 5 includes:

[0057] The connecting plate 51 is fixedly connected to the moving end of the vertical driving member 4 and is arranged parallel to the base plate 1.

[0058] A buffer element 52 is disposed on the side of the connecting plate 51 facing the base plate 1;

[0059] An elastic contact layer 53 is disposed between the buffer element 52 and the wedge block 31. One surface of the elastic contact layer 53 is connected to the buffer element 52, and the other surface is used to form an elastic contact with the wedge block 31. The moving end of the vertical driving member 4 drives the connecting plate 51 to move downward. Since the connecting plate 51 is fixedly connected to the moving end of the vertical driving member 4 and is set parallel to the base plate 1, it can maintain horizontal stability during the downward movement, providing a smooth motion basis for subsequent components. When the connecting plate 51 moves downward and approaches the wedge block 31 in the detection assembly 3, the buffer element 52 disposed on the side of the connecting plate 51 facing the base plate 1 first plays a buffering role. The buffer element 52 can... The impact force on the wedge block 31 when the connecting plate 51 moves downward is reduced, avoiding damage to the wedge block 31 or the tested material due to excessive instantaneous pressure. It also prevents the impact force from affecting the positional stability of the detection component 3. The elastic contact layer 53, located between the buffer element 52 and the wedge block 31, is connected to the buffer element 52 on one side and forms an elastic contact with the wedge block 31 on the other side. When the ultrasonic transducer 32 is working, vibrations will be generated in the wedge block 31. The elastic contact layer 53 can effectively absorb these vibrations, preventing the vibrations from continuously transmitting in the wedge block 31 and generating echoes. This prevents the echoes from interfering with the normal propagation path and signal strength of the ultrasonic waves, thus ensuring the quality of the ultrasonic waves.

[0060] In a preferred embodiment, this utility model can be further configured as follows: Figure 2 , Figure 3 As shown; the fixing component 6 includes:

[0061] Guide sleeve 61 vertically penetrates and is fixedly connected to connecting plate 51;

[0062] The elastic element 62 is disposed inside the guide sleeve 61, and its first end is fixedly connected to the inner wall of the guide sleeve 61.

[0063] Piston 63 is disposed inside guide sleeve 61 and fixedly connected to the second end of elastic element 62, and piston 63 and guide sleeve 61 form a sliding fit;

[0064] The connecting rod 64 has its first end fixedly connected to the piston 63, and its second end passes through the guide sleeve 61 and extends to the outside.

[0065] A fixed pressure head 65 is located at the second end of the connecting rod 64. When the vertical driving component 4 drives the abutment component 5 to move downward, the guide sleeve 61, which is fixedly connected to the connecting plate 51 and vertically penetrates it, descends synchronously. During the descent, the fixed pressure head 65 gradually approaches the material being tested. Since the piston component 63 forms a sliding fit with the guide sleeve 61 inside the guide sleeve 61 and is connected to the fixed pressure head 65 through the connecting rod 64, when the fixed pressure head 65 contacts the surface of the material being tested, the continuing descent of the guide sleeve 61 will squeeze the fixed pressure head 65, causing the connecting rod 64 to... 4. The piston 63 is driven to slide upward within the guide sleeve 61, thereby compressing the elastic element 62 located inside the guide sleeve 61. After being compressed, the elastic element 62 generates elastic force, which is transmitted to the fixed pressure head 65 through the piston 63 and the connecting rod 64. This causes the fixed pressure head 65 to press the material to be tested firmly onto the base plate 1 with appropriate pressure. The elastic element 62 can adaptively adjust the pressure according to the actual situation of the material to be tested, which not only ensures the reliable fixation of the material to be tested, but also avoids damage to the material to be tested due to excessive pressure. The elastic element 62 is preferably a spring.

[0066] In a preferred embodiment, this utility model can be further configured as follows: Figure 3 , Figure 4As shown; an elastic abutment airbag 8 is provided on the side of the fixed pressure head 65 away from the connecting rod 64. Both the connecting rod 64 and the piston 63 have interconnected air passages 9. An air storage chamber is formed inside the elastic abutment airbag 8, which is connected to the air passage 9 via a connecting pipe 10 to form a fluid passage. When the vertical driving component 4 drives the abutment assembly 5 downwards, the fixed pressure head 65 of the fixed component 6 gradually approaches the surface of the material being tested. During the process of the piston 63 being squeezed and sliding within the guide sleeve 61, and the elastic element 62 being compressed, the gas in the guide sleeve 61 passes through the air passage 9. The gas enters the connecting tube 10 and finally enters the gas storage chamber of the elastic abutment airbag 8. As the fixed pressure head 65 presses down further, the elastic abutment airbag 8 comes into contact with the surface of the material being tested. At this time, the gas flowing into the gas storage chamber causes the elastic abutment airbag 8 to gradually expand. The expanded elastic abutment airbag 8 can closely fit the contour of the surface of the material being tested. Whether the surface is flat or has a certain degree of unevenness, the elastic abutment airbag 8 can achieve full contact with the surface of the material being tested through its own deformation and gas pressure, thereby increasing the friction and fixing effect between the fixed pressure head 65 and the material being tested.

[0067] In a preferred embodiment, this utility model can be further configured as follows: Figure 2 , Figure 3 As shown, the outer surface of the elastic contact airbag 8 is provided with an anti-slip contact layer 11. The anti-slip contact layer 11 is made of an elastic material with a friction coefficient of not less than 0.5. When the elastic contact airbag 8 expands under the action of gas pressure and adheres to the surface of the material being tested, the anti-slip contact layer 11, made of an elastic material with a friction coefficient of not less than 0.5, is in close contact with the surface of the material being tested. Due to its high friction coefficient, the anti-slip contact layer 11 can generate a large friction force with the surface of the material being tested. Even if there are slight external vibrations, small vibrations generated by the operation of the detection component 3, or weak interference caused by the propagation of ultrasonic waves during the testing process, this friction force can effectively prevent the relative displacement of the material being tested, ensuring that the material being tested is firmly fixed on the base plate 1. At the same time, the elastic material used in the anti-slip contact layer 11 allows it to adaptively deform according to the slight undulations of the material surface when in contact with the surface of the material being tested, further increasing the contact area, enhancing the friction force, and achieving a more reliable fixing effect.

[0068] The specific working principle of the ultrasonic residual stress detection fixture of this utility model is as follows:

[0069] According to the volume and shape of the material being tested, the sliding part at the bottom of the vertical rod 21 of the sliding bracket 2 moves in the guide groove 7 of the base plate 1 to adjust the distance and position of the two brackets 2 to fit the material being tested. After the adjustment is in place, the locking function of the sliding part is used to fix the bracket 2 firmly.

[0070] Next, the material to be tested is placed on the horizontal mounting surface of the base plate 1, and the stable bearing surface provided by the base plate 1 is used to ensure that the material to be tested is in a stable state.

[0071] Subsequently, the two wedge blocks 31 in the detection component 3 are placed together on the surface of the material to be tested, so that the ultrasonic transducer 32 embedded in the wedge block 31 is in place, in preparation for ultrasonic residual stress detection.

[0072] At this time, the output end of the vertical drive component 4 is activated to drive the contact component 5 to move downward in the vertical direction. During the movement, the buffer element 52 of the contact component 5 first reduces the impact force of the connecting plate 51 on the wedge block 31 as it moves downward, preventing damage to the material under test and the detection component 3. Then, the elastic contact layer 53 gradually presses the detection component 3 against the surface of the material under test, absorbing the vibration of the wedge block 31 and ensuring the quality of the ultrasonic waves.

[0073] Simultaneously, the fixing component 6 moves down synchronously with the abutting component 5. When the fixing pressure head 65 contacts the surface of the material to be tested, the guide sleeve 61, which continues to descend, squeezes the fixing pressure head 65, causing the connecting rod 64 to drive the piston 63 to slide upward in the guide sleeve 61, compressing the elastic element 62 to generate elastic force, and pressing the material to be tested firmly onto the base plate 1 with appropriate pressure. During this process, the air storage chamber in the elastic abutting airbag 8 expands through the fluid passage formed by the air passage 9 and the connecting pipe 10, closely adhering to the surface contour of the material to be tested, and increasing the fixing friction.

[0074] Finally, the anti-slip contact layer 11, with its high coefficient of friction and elastic deformation, further hinders the relative displacement of the tested material, ensuring that the tested material remains stable throughout the entire testing process.

[0075] At this time, one ultrasonic transducer 32 emits ultrasonic waves that penetrate the material under test, while the other receives the reflected echo and converts it into an electrical signal. The detection system analyzes the electrical signal to determine the residual stress inside the material under test and completes the detection work.

[0076] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0077] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An ultrasonic residual stress testing fixture, characterized in that, include: The base plate (1) has a horizontal mounting surface for supporting the material being tested; The bracket (2) is vertically mounted on the mounting surface of the base plate (1), and there are two of them; The detection component (3) is placed on the surface of the material to be tested and is used to perform ultrasonic residual stress detection on the material to be tested. A vertical driving component (4) is installed on the bracket (2). The moving end of the vertical driving component (4) is connected to the abutment component (5). Driven by the vertical driving component (4), the abutment component (5) presses the detection component (3) against the surface of the material to be tested. A fixing member (6) is disposed on the abutting component (5). During the downward movement of the abutting component (5), the fixing member (6) fixes the material to be tested by pressing down.

2. The ultrasonic residual stress testing fixture according to claim 1, characterized in that, The support (2) includes: Vertical rods (21) are installed vertically on the mounting surface of the base plate (1). The vertical rods (21) are arranged in pairs, and there are two sets in total. A connecting part (22) is fixedly installed on the end of the vertical rod (21) away from the mounting surface of the base plate (1). Each group of vertical rods (21) is provided with one connecting part (22). The connecting part (22) is used to connect and fix two vertical rods (21) in each group.

3. The ultrasonic residual stress testing fixture according to claim 2, characterized in that, At least two guide grooves (7) are provided on the mounting surface of the base plate (1). The bottom end of the vertical rod (21) is provided with a sliding part that is adapted to the guide groove (7). The sliding part is slidably connected to the guide groove (7). The bracket (2) adjusts its position by sliding the sliding part in the guide groove (7).

4. The ultrasonic residual stress testing fixture according to claim 1, characterized in that, The detection component (3) includes: Two wedge blocks (31) are attached to the surface of the material being tested. Ultrasonic transducers (32) are respectively embedded in the wedge block (31). One of the ultrasonic transducers (32) is connected to the detection system to emit ultrasonic waves, and the other ultrasonic transducer (32) is connected to the detection system to receive ultrasonic waves and convert them into electrical signals.

5. The ultrasonic residual stress testing fixture according to claim 2, characterized in that, The vertical driving component (4) is an electric push rod. The fixed end of the electric push rod is fixedly installed at the axis of the connecting part (22), and the output end of the electric push rod faces the mounting surface of the base plate (1) and is connected to the abutment component (5).

6. The ultrasonic residual stress testing fixture according to claim 4, characterized in that, The abutment component (5) includes: The connecting plate (51) is fixedly connected to the moving end of the vertical driving member (4) and is arranged parallel to the base plate (1); A buffer element (52) is disposed on the side of the connecting plate (51) facing the base plate (1); An elastic contact layer (53) is disposed between the buffer element (52) and the wedge block (31). One side surface of the elastic contact layer (53) is connected to the buffer element (52), and the other side surface is used to form an elastic contact with the wedge block (31).

7. The ultrasonic residual stress testing fixture according to claim 6, characterized in that, The fixing component (6) includes: A guide sleeve (61) vertically penetrates the connecting plate (51) and is fixedly connected to it; An elastic element (62) is disposed inside the guide sleeve (61), and its first end is fixedly connected to the inner wall of the guide sleeve (61). A piston (63) is disposed inside the guide sleeve (61) and fixedly connected to the second end of the elastic element (62), and the piston (63) and the guide sleeve (61) form a sliding fit; A connecting rod (64) has its first end fixedly connected to the piston (63) and its second end passing through the guide sleeve (61) and extending to the outside; A fixed pressure head (65) is disposed at the second end of the connecting rod (64).

8. The ultrasonic residual stress testing fixture according to claim 7, characterized in that, The fixed pressure head (65) is provided with an elastic abutment airbag (8) on the side away from the connecting rod (64). The connecting rod (64) and the piston (63) are both provided with interconnected air passages (9). An air storage chamber is formed inside the elastic abutment airbag (8). The air storage chamber is connected to the air passage (9) through a connecting pipe (10) to form a fluid passage.

9. The ultrasonic residual stress testing fixture according to claim 8, characterized in that, The outer surface of the elastic contact airbag (8) is provided with an anti-slip contact layer (11), which is made of an elastic material with a friction coefficient of not less than 0.5.

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