Performance testing device for nickel-titanium alloy production

Abstract

The invention relates to the technical field of nickel-titanium alloy testing, in particular to a performance testing device for nickel-titanium alloy production, which comprises a mounting base, and is characterized in that the bottom of the mounting base is fixedly connected with a mounting bracket, and the upper end of the mounting base is fixedly connected with an electric hydraulic rod; the output end of the electric hydraulic rod is fixedly provided with an extrusion mechanism capable of extruding the nickel-titanium alloy pipe, a testing mechanism capable of testing the nickel-titanium alloy pipe is further fixedly installed between the mounting base and the electric hydraulic rod, and the upper end of the mounting base is further fixedly provided with a fixing mechanism capable of limiting the nickel-titanium alloy pipe. When the nickel-titanium alloy pipe is extruded and bent by a test, the fixing mechanism can be adjusted along with the deformation of the nickel-titanium alloy pipe, the two test modes verify each other, the performance of the alloy pipe is analyzed from multiple dimensions, the mechanical properties of the alloy pipe under different stress combinations can be evaluated more comprehensively and deeply, and the internal structure defects of the material can be found in time.

Description

Technical Field

[0001] The present invention relates to the technical field of nickel-titanium alloy testing, in particular to a performance testing device for nickel-titanium alloy production. Background Art

[0002] Nickel-titanium alloys are widely used in various industries, including medical devices, aerospace, and automotive manufacturing, due to their shape memory effect, superelasticity, excellent biocompatibility, and strong corrosion resistance. As an important product type of nickel-titanium alloys, nickel-titanium alloy tubes play a core role in key scenarios such as invasive medical devices and aviation catheters, which place extremely strict requirements on their hardness and strength.

[0003] However, the current performance testing technology of nickel-titanium alloy tubes is difficult to keep up with the rapid development of the industry, and has exposed a large number of problems. Existing nickel-titanium alloy tube hardness tests mostly use static indentation methods such as Brinell and Rockwell. Such methods can only reflect the local hardness of the alloy tube surface, and cannot present the overall hardness distribution, especially the internal hardness distribution. However, in actual use, nickel-titanium alloy tubes such as those used in heart stents must have uniform hardness in all parts. Otherwise, after implantation into the human body, they are very likely to deform and break due to uneven force. Moreover, the static indentation method cannot simulate the complex stresses that nickel-titanium alloy tubes are subjected to under real working conditions. In the field of aerospace, nickel-titanium alloy tubes need to cope with high-speed airflow impact, drastic temperature changes and mechanical vibrations. The static test results are quite different from the actual usage conditions, making it difficult to accurately evaluate their performance.

[0004] In terms of strength testing, traditional testing methods mainly rely on tensile tests, which can only detect the axial tensile strength of nickel-titanium alloy tubes. They cannot meet the needs of nickel-titanium alloy tubes in actual applications to withstand complex stresses such as internal pressure, bending, and torsion. For example, automobile fuel delivery pipes not only have to withstand the internal pressure of the fuel during operation, but also withstand complex stresses due to the vibration and bending of the vehicle. A single tensile test cannot fully evaluate their comprehensive strength. At the same time, existing strength testing methods are difficult to monitor internal defects of alloy tubes in real time. When there are defects such as pores and cracks inside the nickel-titanium alloy tubes, the defects will gradually expand during the pressure process, eventually leading to pipe rupture. However, traditional non-destructive testing methods, such as ultrasonic and radiographic testing, cannot monitor the development of defects in real time during the strength test, making it difficult to detect potential safety hazards in advance. Traditional testing devices will produce errors, and more sophisticated sensors are required.

[0005] Therefore, the development of a new nickel-titanium alloy tube performance testing device that can simulate real working conditions, observe bending conditions through extrusion tests to detect hardness, and evaluate strength with the help of internal water pressure tests is of extremely important practical significance for improving the quality of nickel-titanium alloy tubes and promoting the safe and efficient application of nickel-titanium alloys in various fields.

[0006] A Chinese patent (publication number CN108226018A) discloses a titanium alloy corrosion resistance testing device, which belongs to the field of aerospace medical technology. The testing device includes an electrode array device, a temperature control box, and a titanium beam electrode corrosion monitor. The testing device is suitable for detecting corrosion of titanium metal or titanium alloys and can effectively reduce the safety risks posed by titanium alloy corrosion.

[0007] According to the above scheme, it can be seen that when the above scheme is used, it only tests the corrosion resistance of titanium alloy metal, cannot test its hardness, and cannot test how much pressure it can withstand. It has limitations. In order to solve the problems of not being able to detect its hardness and not being able to test how much pressure it can withstand, we have proposed a performance testing device for nickel-titanium alloy production. Summary of the Invention

[0008] The purpose of the present invention is to provide a performance testing device for nickel-titanium alloy production to solve the problems raised in the above background technology.

[0009] To achieve the above object, the present invention provides the following technical solutions:

[0010] A performance testing device for nickel-titanium alloy production includes a mounting base, the bottom of the mounting base is fixedly connected to a mounting bracket, the upper end of the mounting base is fixedly connected to an electric hydraulic rod, the output end of the electric hydraulic rod is fixedly installed with an extrusion mechanism capable of extruding a nickel-titanium alloy tube, a testing mechanism capable of testing the nickel-titanium alloy tube is also fixedly installed between the mounting base and the electric hydraulic rod, and a fixing mechanism capable of limiting the position of the nickel-titanium alloy tube is also fixedly installed on the upper end of the mounting base. When the nickel-titanium alloy tube is bent by test extrusion, the fixing mechanism can be adjusted as the nickel-titanium alloy tube deforms.

[0011] As a further embodiment of this solution, the extrusion mechanism includes a connecting tube, the outer wall of the connecting tube is fixedly connected to the output end of the electric hydraulic rod, and the end of the connecting tube away from the electric hydraulic rod is fixedly connected to a first elastic telescopic tube, and the interior of the first elastic telescopic tube and the connecting tube are both filled with liquid water.

[0012] As a further feature of this solution, the end of the first elastic telescopic tube away from the connecting tube is fixedly connected to a pressure intelligent sensor, a second spring is fixedly installed on the inner wall of the first elastic telescopic tube, and the bottom of the connecting tube is slidably connected to the upper end of the mounting base.

[0013] As a further feature of this solution, the upper end of the mounting base is fixedly connected to an abutting inner tube, and the right end of the abutting inner tube is fixedly connected to an abutting outer tube.

[0014] As a further embodiment of this solution, the testing mechanism includes a second elastic telescopic tube, which is fixedly connected to the left end of the inner wall of the first elastic telescopic tube. The end of the second elastic telescopic tube away from the first elastic telescopic tube is fixedly connected to a connecting block. The inner wall of the connecting tube is slidably connected to a plurality of abutment plates, and each of the abutment plates is fixedly connected to the connecting block through a connecting arm.

[0015] As a further feature of this solution, the outer wall of the connecting pipe is also provided with multiple openings, and each opening is abutted against the outer wall of a corresponding abutment plate at one end close to the inner wall of the connecting pipe. The outer wall of the connecting pipe is fixedly connected to multiple corrugated sleeves, and each corrugated sleeve is connected to the corresponding opening.

[0016] As a further feature of this solution, a third spring is fixedly connected to the inside of the corrugated sleeve, and an abutment block is provided on the side of each abutment plate away from the inner wall of the connecting tube. The outer wall of the abutment block abuts against the abutment plate, and the abutment block and the abutment plate are also rotationally connected through a plurality of swing arms with a reset function. All the abutment blocks are fixedly connected by a pulling block, and the pulling block and the mounting base are fixedly connected by a pull rope, and the outer wall of the pull rope is slidably passed through the interior of the connecting tube.

[0017] As a further feature of this solution, the fixing mechanism includes two mating plates, each of which has two arc-bending grooves at the front end, and four movable plates are arranged between the two mating plates. Each of the movable plates is fixedly connected to a movable column and a mating column at one end close to the mating plate, and the outer walls of each movable column and the mating column are slidably connected to the inner walls of the corresponding arc-bending grooves, and each mating column is fixedly connected to the corresponding mating plate by a fourth spring.

[0018] As a further feature of this solution, a fourth elastic telescopic tube and a connecting pipe are provided between the two mating plates. The fourth elastic telescopic tube and the connecting pipe are both fixedly connected with each other through a rubber tube. The fourth elastic telescopic tube and the connecting pipe are respectively fixedly connected with the corresponding two movable plates.

[0019] As a further embodiment of this solution, the upper end of the connecting pipe is fixedly connected to a clamping pipe, the upper end of the clamping pipe is fixedly installed with an automatic valve, the bottom of the fourth elastic telescopic tube is fixedly connected to a third elastic telescopic tube, and the bottom of the third elastic telescopic tube is fixedly connected to an abutting circular plate.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. This testing device uses an intelligent pressure sensor to perform precise extrusion operations on nickel-titanium alloy tubes, which can quantitatively obtain the hardness data of the alloy tube, intuitively understand its tolerance under different pressures, and accurately determine the maximum hardness it can withstand. At the same time, liquid water is injected into the alloy tube and pressure is applied, which can simulate the working conditions of the alloy tube under internal pressure in actual application scenarios, thereby testing the maximum pressure it can withstand. Through these two testing methods, not only can the mechanical properties of the nickel-titanium alloy tube be comprehensively evaluated, the accuracy and reliability of the test results can be greatly improved, providing data support for optimizing the production process of the alloy tube and ensuring product quality, but also effectively avoiding safety accidents caused by performance defects, reducing usage risks, and expanding the application potential of nickel-titanium alloy tubes in medical, aerospace and other fields with strict requirements on material performance.

[0022] 2. When the present invention is used, the internal pressure and the external pressure are tested simultaneously, which greatly improves the testing efficiency and significantly saves testing time and cost. The two testing methods verify each other and analyze the performance of the alloy tube from multiple dimensions. It can more comprehensively and deeply evaluate the mechanical properties of the alloy tube under different stress combinations and timely discover internal structural defects of the material;

[0023] 3. The intelligent pressure sensor can more accurately measure the pressure that the nickel-titanium alloy tube can withstand, achieving a smaller error. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a front view of a performance testing device for nickel-titanium alloy production.

[0025] Figure 2 This is a schematic diagram of the position structure of the installation base in a performance testing device for nickel-titanium alloy production.

[0026] Figure 3 This is a schematic diagram of the internal structure of the first elastic telescopic tube in a performance testing device for nickel-titanium alloy production.

[0027] Figure 4 This is a schematic diagram of the internal structure of a corrugated sleeve in a performance testing device for nickel-titanium alloy production.

[0028] Figure 5 This is a schematic diagram of the internal structure of a connecting tube in a performance testing device for nickel-titanium alloy production.

[0029] Figure 6 This is a schematic diagram of the position structure of the abutment plate in a performance testing device for nickel-titanium alloy production.

[0030] Figure 7 This is a schematic diagram of the structure of the fixing mechanism in a performance testing device for nickel-titanium alloy production.

[0031] Figure 8 This is a schematic diagram of the position structure of connecting pipes in a performance testing device for nickel-titanium alloy production.

[0032] In the figure: 1. Electric hydraulic rod; 2. Mounting base; 3. Mounting bracket; 4. Mounting pad; 5. Sliding frame; 6. Sliding bar; 7. Abutment outer tube; 8. Abutment inner tube; 9. Bellows; 10. Draw cord; 11. Connecting tube; 12. Second spring; 13. First elastic telescopic tube;

[0033] 14. Intelligent pressure sensor; 15. Second elastic telescopic tube; 16. Abutment plate; 17. Connecting block; 18. Abutment block; 19. Pulling block; 20. Third spring; 21. Opening; 22. Scale block; 23. Swing arm; 25. Bending groove; 26. Matching plate; 27. Moving plate; 28. Fourth spring;

[0034] 29. Abutting circular plate; 30. Third elastic telescopic tube; 31. Fourth elastic telescopic tube; 33. Clamping tube; 34. Automatic valve; 35. Connecting pipe; 36. Moving column; 37. Matching column; 101. Fixing mechanism; 201. Extrusion mechanism; 301. Testing mechanism. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] Example 1: Please refer to Figures 1 and 2 As shown, in an embodiment of the present invention, a performance testing device for nickel-titanium alloy production includes a mounting base 2, a mounting bracket 3 is fixedly connected to the bottom of the mounting base 2, a plurality of mounting pads 4 are fixedly connected to the bottom of the mounting bracket 3, the mounting pads 4 are made of silicone material and have good elasticity, which can well reduce the vibration generated by the mounting base 2 and the mounting bracket 3, and increase the friction between the mounting bracket 3 and the ground, the upper end of the mounting base 2 is fixedly connected to an electric hydraulic rod 1 by bolts, the output end of the electric hydraulic rod 1 is fixedly installed with an extrusion mechanism 201 that can extrude the nickel-titanium alloy tube, a testing mechanism 301 that can test the nickel-titanium alloy tube is also fixedly installed between the mounting base 2 and the electric hydraulic rod 1, and a fixing mechanism 101 that can limit the nickel-titanium alloy tube is also fixedly installed on the upper end of the mounting base 2. When the nickel-titanium alloy tube is extruded and bent during the test, the fixing mechanism 101 can be adjusted as the nickel-titanium alloy tube is deformed;

[0037] Example 2: Please refer to Figures 2 to 6As shown, the extrusion mechanism 201 includes a connecting tube 11. The connecting tube 11 is made of tempered glass, which allows for good internal observation. The outer wall of the connecting tube 11 is fixedly connected to the output end of the electric hydraulic rod 1 by bolts. The end of the connecting tube 11 away from the electric hydraulic rod 1 is fixedly connected to a first elastic telescopic tube 13. The first elastic telescopic tube 13 and the interior of the connecting tube 11 are both filled with liquid water. The end of the first elastic telescopic tube 13 away from the connecting tube 11 is fixedly connected to a pressure intelligent sensor 14. The pressure intelligent sensor 14 is "cylindrical". A second spring 12 is fixedly installed on the inner wall of the first elastic telescopic tube 13. The second spring 12 can drive the first elastic telescopic tube 13 to quickly reset. The bottom of the connecting tube 11 is slidably connected to the upper end of the mounting base 2.

[0038] The two sliding bars 6 are symmetrically distributed front to back at the upper end of the mounting base 2. The bottom of the sliding frame 5 is provided with two sliding openings, and the two sliding openings are symmetrically distributed front to back at the bottom of the sliding frame 5. The inner wall of each sliding opening is slidably connected to the outer wall of the corresponding sliding bar 6. When the connecting tube 11 moves through the sliding frame 5, the sliding frame 5 will slide on the outer wall of the sliding bar 6 through the two sliding openings. The sliding bar 6 will limit the sliding frame 5 and the connecting tube 11 through the sliding opening, and also has a guiding function, thereby improving the stability of the sliding frame 5 and the connecting tube 11 when moving. The inner wall of the sliding opening and the outer wall of the sliding bar 6 are both coated with lubricating oil. The lubricating oil greatly reduces the friction between the sliding opening and the sliding bar 6, thereby extending the service life of the sliding opening and the sliding bar 6.

[0039] The testing mechanism 301 includes a second elastic telescopic tube 15, which is fixedly connected to the left end of the inner wall of the first elastic telescopic tube 13, and the outer wall of the second elastic telescopic tube 15 is passed through the interior of the second spring 12. The end of the second elastic telescopic tube 15 away from the first elastic telescopic tube 13 is fixedly connected to a connecting block 17, and the inner wall of the connecting tube 11 is slidably connected to a plurality of abutment plates 16, and the outer wall of each abutment plate 16 is fixedly connected to a scale block 22 for facilitating the staff to observe the distance moved by the abutment plate 16. The plurality of abutment plates 16 are circumferentially distributed in the inner wall of the connecting tube 11, and each abutment plate 16 is fixedly connected to the connecting block 17 through a connecting arm. The outer wall of the connecting tube 11 is also provided with a plurality of openings 21, and the plurality of openings 21 are circumferentially distributed on the outer wall of the connecting tube 11. The end of each opening 21 close to the inner wall of the connecting tube 11 abuts against the outer wall of a corresponding abutment plate 16. The cam 21 of the embodiment of the present invention is a kind of cam 22, and the cam 22 of the embodiment of the present invention is a kind of cam 22, and the cam 22 of the embodiment of the present invention is a kind of cam 22.

[0040] All the abutment blocks 18 are fixedly connected by a pulling block 19, which is made of rubber. A plurality of weight-reducing openings are provided on the outer wall of the pulling block 19, and the plurality of weight-reducing openings are distributed circumferentially on the outer wall of the pulling block 19. The pulling block 19 is fixedly connected to the mounting base 2 by a pull rope 10, which is made of plastic. Plastic has the characteristics of high strength, good toughness, wear resistance, chemical corrosion resistance and light weight, and has good adaptability. The outer wall of the pull rope 10 slides through the interior of the connecting tube 11.

[0041] See also Figure 2 、 Figure 3 、 Figure 7 、 Figure 8As shown, the fixing mechanism 101 includes two matching plates 26, and each matching plate 26 has two arc grooves 25 at the front end. The two arc grooves 25 are symmetrically distributed on the outer wall of the matching plate 26, and the arc grooves 25 are "arc-shaped". Four movable plates 27 are arranged between the two matching plates 26. Each movable plate 27 is fixedly connected to a movable column 36 and a matching column 37 at one end close to the matching plate 26. The outer wall of each movable column 36 and the matching column 37 is slidably connected to the inner wall of the corresponding arc groove 25. Each matching column 37 is fixedly connected to the corresponding matching plate 26 by a fourth spring 28. The elastic coefficient of the fourth spring 28 is only used to pull the matching column 37 and the movable plate 27 to reset. The pulling force it brings is too small and can be ignored. A fourth elastic telescopic tube 31 and a connecting pipe 35 are provided between the two mating plates 26. The fourth elastic telescopic tube 31 and the connecting pipe 35 are symmetrically distributed up and down between the two mating plates 26. The fourth elastic telescopic tube 31 and the connecting pipe 35 are both fixedly connected to the connecting pipe 11 through a rubber tube. The fourth elastic telescopic tube 31 and the connecting pipe 35 are respectively fixedly connected to the corresponding two movable plates 27. The upper end of the connecting pipe 35 is fixedly connected to a clamping tube 33. The outer wall diameter of the clamping tube 33 is smaller than the inner wall diameter of the nickel-titanium alloy tube to be measured. Therefore, when the nickel-titanium alloy tube is inserted into the outer wall of the clamping tube 33, the outer wall of the clamping tube 33 fits tightly with the inner wall of the nickel-titanium alloy tube, which can limit and fix the nickel-titanium alloy tube. An automatic valve 34 is fixedly installed on the upper end of the clamping tube 33.

[0042] The fourth elastic telescopic tube 31 is fixedly installed with a first spring, and the elastic coefficient of the first spring is greater than the pressure coefficient of the liquid water inside the first elastic telescopic tube 13 and the connecting tube 11. The bottom of the fourth elastic telescopic tube 31 is fixedly connected to the third elastic telescopic tube 30, and the bottom of the third elastic telescopic tube 30 is fixedly connected to the abutting circular plate 29. When the nickel-titanium alloy tube is clamped on the outer wall of the clamping tube 33, the liquid water will enter the fourth elastic telescopic tube 31. The extension of the fourth elastic telescopic tube 31 drives the third elastic telescopic tube 30 and the abutting circular plate 29 to enter the nickel-titanium alloy tube. When the output end of the fourth elastic telescopic tube 31 abuts the upper end of the nickel-titanium alloy tube and cannot be extended, the liquid water inside the clamping tube 33 will be discharged from the automatic valve 34 into the nickel-titanium alloy tube. When the liquid water enters the nickel-titanium alloy tube, it pushes the abutting circular plate 29 upward. When the third elastic telescopic tube 30 contracts to its limit, the abutting circular plate 29 can block the upper end of the nickel-titanium alloy tube.

[0043] A water injection port is provided on the outer wall of the connecting pipe 11, and a pressure valve is installed inside the water injection port. When liquid water needs to be filled into the connecting pipe 11 and the first elastic telescopic tube 13, water is injected into the water injection port through a high-pressure pump, and water will enter the connecting pipe 11 and the first elastic telescopic tube 13. The high-pressure pump will push open the pressure valve and replenish the connecting pipe 11 and the first elastic telescopic tube 13.

[0044] The working principle of the present invention is:

[0045] When the present invention is in use, the nickel-titanium alloy tube is disassembled onto the outer wall of the clamping tube 33. At this time, the electric hydraulic rod 1 is started, and the electric hydraulic rod 1 will drive the connecting tube 11 and the first elastic telescopic tube 13 to move together. When the outer wall of the pressure intelligent sensor 14 abuts against the outer wall of the nickel-titanium alloy tube, the pressure inside the first elastic telescopic tube 13 and the connecting tube 11 is very large. The state of the first elastic telescopic tube 13 at this time is that the pressure of the liquid water inside is too large to stretch it, which means that the second spring 12 inside the first elastic telescopic tube 13 is in a stretched and force-accumulating state. At this time, the first elastic telescopic tube 13 is squeezed, and the liquid water inside the first elastic telescopic tube 13 will enter the fourth elastic telescopic tube 31. The fourth elastic telescopic tube 31 is extended, and the fourth elastic telescopic tube 31 drives the third elastic telescopic tube 30 and the abutting circular plate 29 to move to the inside of the nickel-titanium alloy tube. When the first elastic telescopic tube 13 continues to contract, the automatic valve 34 at this time automatically opens. , the liquid water inside the connecting pipe 35 will enter the interior of the nickel-titanium alloy tube through the automatic valve 34. It is worth noting that each time the electric hydraulic rod 1 drives the first elastic telescopic tube 13 and the connecting tube 11 to move, the moving distance is limited. When the first elastic telescopic tube 13 detects through the pressure intelligent sensor 14 that the force of squeezing the outer wall of the nickel-titanium alloy tube reaches the set range, it will stop squeezing the nickel-titanium alloy tube. When the first elastic telescopic tube 13 continues to be squeezed, the liquid water will pressurize the inside of the nickel-titanium alloy tube, and the pressure intelligent sensor 14 will further squeeze the outer wall of the nickel-titanium alloy tube. It is worth noting that at this time, the abutment plate 16 has not broken away from the abutment with the outer wall of the opening 21, and still has a blocking effect on the opening 21. When the nickel-titanium alloy tube does not undergo any changes, it means that when the nickel-titanium alloy tube is filled with high-pressure liquid, it is still squeezed with high intensity without deformation, indicating that there is no problem with the quality of the nickel-titanium alloy tube.

[0046] When the nickel-titanium alloy tube cannot withstand the high-pressure liquid inside, the nickel-titanium alloy tube will rupture and liquid water will spray out. At this time, the automatic valve 34 will automatically close. Since the liquid water between the first elastic telescopic tube 13 and the connecting tube 11 is released, the first elastic telescopic tube 13 will shrink. The first elastic telescopic tube 13 will drive the connecting block 17 to move through the abutment plate 16. The connecting block 17 will be separated from the abutment with the outer wall of the opening 21 through the abutment plate 16. The liquid water inside the first elastic telescopic tube 13 and the connecting tube 11 will enter all the corrugated sleeves 9. When the corrugated sleeves 9 are reset, they will absorb the liquid water to prevent the liquid water from continuing to leak out. It can be concluded that the quality of this nickel-titanium alloy tube is problematic.

[0047] When the nickel-titanium alloy tube does not leak but bends, it means that when the nickel-titanium alloy tube bends, the electric hydraulic rod 1 is still driving the connecting tube 11, the first elastic telescopic tube 13 and the pressure intelligent sensor 14 to continue to move. Since a pull rope 10 is connected between the pulling block 19 and the mounting base 2, when the connecting tube 11 moves, the pull rope 10 will pull the pulling block 19. Since the pulling block 19 is made of rubber, the pulling block 19 will drive all the abutting blocks 18 to move closer to the center. The pulling block 19 will deform and will not be affected. The abutting block 18 will be separated from the abutting plate 16. When the nickel-titanium alloy tube is bent, the upper and lower ends of the nickel-titanium alloy tube abut against the outer walls of the fourth elastic telescopic tube 31 and the clamping tube 33, respectively, so that the fourth elastic telescopic tube 31 and the clamping tube 33 are driven to move. The fourth elastic telescopic tube 31 drives the corresponding two movable plates 27 to move. The movable plates 27 slide in the inner wall of the bending groove 25 through the movable column 36 and the matching column 37.

[0048] When the measurement is completed, the electric hydraulic rod 1 will drive the connecting tube 11 and the first elastic telescopic tube 13 to reset, so the first elastic telescopic tube 13 loses its extrusion at this time, and the fourth elastic telescopic tube 31 will drive the third spring 20 and the abutment circular plate 29 to reset, and the automatic valve 34 will automatically close. When the outer wall of the bellows sleeve 9 abuts the inner wall of the abutment outer tube 7, it gradually moves toward the inside of the abutment inner tube 8, the bellows sleeve 9 will shrink, and the liquid water inside the bellows sleeve 9 will enter the first elastic telescopic tube 13 and the connecting tube 11. At this time, water is injected into the connecting tube 11 and the first elastic telescopic tube 13 through the water injection port. When the first elastic telescopic tube 13 is reset, the first elastic telescopic tube 13 will drive the second elastic telescopic tube 15 and the connecting block 17 to reset, and the connecting block 17 drives the abutment plate 16 to reset. The abutment plate 16 will abut against the outer wall of the opening 21, and the second test can be carried out at this time.

[0049] The above are only preferred specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A performance testing device for nickel-titanium alloy production, comprising a mounting base (2), characterized in that: The bottom of the mounting base (2) is fixedly connected to a mounting bracket (3), the upper end of the mounting base (2) is fixedly connected to an electric hydraulic rod (1), an output end of the electric hydraulic rod (1) is fixedly mounted with an extrusion mechanism (201) capable of extruding the nickel-titanium alloy tube, a testing mechanism (301) capable of testing the nickel-titanium alloy tube is also fixedly mounted between the mounting base (2) and the electric hydraulic rod (1), and a fixing mechanism (101) capable of limiting the nickel-titanium alloy tube is also fixedly mounted on the upper end of the mounting base (2), and when the nickel-titanium alloy tube is subjected to test extrusion and bending, the fixing mechanism (101) can be adjusted as the nickel-titanium alloy tube deforms.

2. A performance testing device for nickel-titanium alloy production according to claim 1, characterized in that: The squeezing mechanism (201) comprises a connecting tube (11), the outer wall of the connecting tube (11) being fixedly connected to the output end of the electric hydraulic rod (1), and one end of the connecting tube (11) away from the electric hydraulic rod (1) being fixedly connected to a first elastic telescopic tube (13), the interiors of the first elastic telescopic tube (13) and the connecting tube (11) being filled with liquid water.

3. A performance testing device for nickel-titanium alloy production according to claim 2, characterized in that: An end of the first elastic telescopic tube (13) away from the connecting tube (11) is fixedly connected to a pressure intelligent sensor (14); a second spring (12) is fixedly mounted on the inner wall of the first elastic telescopic tube (13); and the bottom of the connecting tube (11) is slidably connected to the upper end of the mounting base (2).

4. A performance testing device for nickel-titanium alloy production according to claim 1, characterized in that: The upper end of the mounting base (2) is fixedly connected to an abutting inner tube (8), and the right end of the abutting inner tube (8) is fixedly connected to an abutting outer tube (7).

5. The performance testing device for nickel-titanium alloy production according to claim 2, characterized in that: The testing mechanism (301) comprises a second elastic telescopic tube (15), the second elastic telescopic tube (15) being fixedly connected to the left end of the inner wall of the first elastic telescopic tube (13), the end of the second elastic telescopic tube (15) away from the first elastic telescopic tube (13) being fixedly connected to a connecting block (17), the inner wall of the connecting tube (11) being slidably connected to a plurality of abutment plates (16), each of the abutment plates (16) being fixedly connected to the connecting block (17) via a connecting arm.

6. A performance testing device for nickel-titanium alloy production according to claim 5, characterized in that: The outer wall of the connecting pipe (11) is further provided with a plurality of openings (21), and one end of each opening (21) close to the inner wall of the connecting pipe (11) abuts against the outer wall of a corresponding abutment plate (16). The outer wall of the connecting pipe (11) is fixedly connected with a plurality of corrugated sleeves (9), and each corrugated sleeve (9) is communicated with a corresponding opening (21).

7. A performance testing device for nickel-titanium alloy production according to claim 6, characterized in that: The interior of the corrugated sleeve (9) is fixedly connected with a third spring (20), and each of the abutment plates (16) is provided with an abutment block (18) on a side away from the inner wall of the connecting tube (11). The outer wall of the abutment block (18) abuts against the abutment plate (16), and the abutment block (18) and the abutment plate (16) are also rotatably connected through a plurality of swing arms (23) with a reset function. All the abutment blocks (18) are fixedly connected by a pulling block (19), and the pulling block (19) and the mounting base (2) are fixedly connected by a pull rope (10), and the outer wall of the pull rope (10) is slidably passed through the interior of the connecting tube (11).

8. The performance testing device for nickel-titanium alloy production according to claim 1, characterized in that: The fixing mechanism (101) includes two matching plates (26), each of which has two arc-bending grooves (25) at its front end, and four movable plates (27) are arranged between the two matching plates (26). Each of the movable plates (27) is fixedly connected to a movable column (36) and a matching column (37) at one end close to the matching plate (26). The outer walls of each movable column (36) and the matching column (37) are slidably connected to the inner walls of the corresponding arc-bending grooves (25), and each matching column (37) is fixedly connected to the corresponding matching plate (26) via a fourth spring (28).

9. A performance testing device for nickel-titanium alloy production according to claim 8, characterized in that: A fourth elastic telescopic tube (31) and a connecting pipe (35) are provided between the two matching plates (26). The fourth elastic telescopic tube (31) and the connecting pipe (35) are both fixedly connected to 11 through a rubber tube. The fourth elastic telescopic tube (31) and the connecting pipe (35) are respectively fixedly connected to the corresponding two movable plates (27).

10. A performance testing device for nickel-titanium alloy production according to claim 9, characterized in that: The upper end of the connecting pipe (35) is fixedly connected to a clamping pipe (33), the upper end of the clamping pipe (33) is fixedly installed with an automatic valve (34), the bottom of the fourth elastic telescopic tube (31) is fixedly connected to a third elastic telescopic tube (30), and the bottom of the third elastic telescopic tube (30) is fixedly connected to an abutting circular plate (29).

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