A performance testing device for nickel-titanium alloy production

Abstract

The present application relates to the technical field of nickel-titanium alloy testing, in particular to a performance testing device for nickel-titanium alloy production, comprising a mounting base, characterized in that a mounting bracket is fixedly connected to the bottom of the mounting base, an electric hydraulic rod is fixedly connected to the upper end of the mounting base, an extrusion mechanism capable of extruding the nickel-titanium alloy pipe is fixedly installed at the output end of the electric hydraulic rod, a testing mechanism capable of testing the nickel-titanium alloy pipe is also fixedly installed between the mounting base and the electric hydraulic rod, and a fixing mechanism capable of limiting the nickel-titanium alloy pipe is also fixedly installed at the upper end of the mounting base; when the nickel-titanium alloy pipe is extruded and bent during testing, the fixing mechanism can be adjusted along with the deformation of the nickel-titanium alloy pipe, the two testing methods are verified with 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 more comprehensively and deeply evaluated, and internal structural defects of the material can be found in time.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of nickel-titanium alloy testing, and particularly relates to a performance testing device for nickel-titanium alloy production. BACKGROUND

[0002] Nickel-titanium alloy has a shape memory effect and super-elasticity, is biocompatible, and is resistant to corrosion, and is widely used in medical devices, aerospace, automobile manufacturing and other industries. As an important product type of nickel-titanium alloy, a nickel-titanium alloy pipe plays a core role in key scenes such as interventional medical devices and aviation catheters, which puts extremely strict requirements on its hardness and strength and other performances.

[0003] However, the current nickel-titanium alloy pipe performance testing technology cannot keep up with the rapid development of the industry, and a large number of problems have been exposed. The existing hardness testing of the nickel-titanium alloy pipe mostly adopts the static indentation method such as the Brinell method and the Rockwell method. Such a method can only reflect the local hardness of the surface of the alloy pipe and cannot present the hardness distribution of the whole pipe, especially the internal hardness. However, in actual use, the nickel-titanium alloy pipe for a heart stent must have uniform hardness at each position. Otherwise, after being implanted into the human body, the pipe is prone to deformation and fracture due to uneven stress. Moreover, the static indentation method cannot simulate the complex stress that the nickel-titanium alloy pipe bears under real working conditions. In the field of aerospace, the nickel-titanium alloy pipe needs to cope with high-speed airflow impact, severe temperature changes and mechanical vibration. The static test result is greatly different from the actual use, and it is difficult to accurately evaluate the performance of the pipe.

[0004] In terms of strength testing, the traditional testing method mainly adopts the tensile test, which can only detect the axial tensile strength of the nickel-titanium alloy pipe and cannot meet the demand of the nickel-titanium alloy pipe for bearing internal pressure, bending, torsion and other combined stresses in actual application. For example, the automobile fuel delivery pipe not only bears the internal pressure of fuel but also bears complex stress due to vibration and bending during vehicle driving. The single tensile test cannot comprehensively evaluate the comprehensive strength. At the same time, the existing strength testing method cannot monitor the internal defects of the alloy pipe in real time. When there are defects such as pores and cracks in the nickel-titanium alloy pipe, the defects will gradually expand during the pressure bearing process, and finally lead to pipe rupture. However, the traditional nondestructive testing methods such as ultrasonic and X-ray detection cannot monitor the defect development in real time during the strength testing process, and it is difficult to detect potential safety hazards in advance. The traditional testing device will produce errors, and more precise instruments with sensors need to be used.

[0005] Therefore, it is of extremely important practical significance to develop a new type of nickel-titanium alloy pipe performance testing device which can simulate real working conditions, observe bending conditions through extrusion testing to detect hardness, and test strength by means of internal water pressure, so as to improve the quality of the nickel-titanium alloy pipe and promote the safe and efficient application of the nickel-titanium alloy in various fields.

[0006] 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 comprises an electrode array device, a temperature control box and a titanium beam electrode corrosion monitor. The testing device is suitable for titanium metal or titanium alloy corrosion detection field and can effectively reduce the safety hazards caused by titanium alloy corrosion.

[0007] According to the above scheme, the above scheme only tests the corrosion resistance of titanium alloy metal, cannot detect the hardness, and cannot test the pressure it can withstand, which has limitations. In order to solve the problems of not being able to detect the hardness and not being able to test the pressure it can withstand, we propose a performance testing device for nickel-titanium alloy production. SUMMARY

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

[0009] To achieve the above purpose, the present application provides the following technical scheme:

[0010] A performance testing device for nickel-titanium alloy production, comprising a mounting base, the bottom of the mounting base is fixedly connected with a mounting bracket, 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 installed with an extrusion mechanism capable of extruding a nickel-titanium alloy pipe, the mounting base and the electric hydraulic rod are also fixedly installed with a testing mechanism capable of testing the nickel-titanium alloy pipe, and the upper end of the mounting base is also fixedly installed with a fixing mechanism capable of limiting the nickel-titanium alloy pipe. When the nickel-titanium alloy pipe is extruded and bent by testing, the fixing mechanism can be adjusted with the deformation of the nickel-titanium alloy pipe.

[0011] As a further embodiment of the present application, the extrusion mechanism comprises a connecting pipe, the outer wall of the connecting pipe is fixedly connected with the output end of the electric hydraulic rod, the end of the connecting pipe away from the electric hydraulic rod is fixedly connected with a first elastic expansion pipe, and the first elastic expansion pipe and the connecting pipe are both filled with liquid water.

[0012] As a further embodiment of the present application, the end of the first elastic expansion pipe away from the connecting pipe is fixedly connected with a pressure intelligent sensor, the inner wall of the first elastic expansion pipe is fixedly installed with a second spring, and the bottom of the connecting pipe is slidingly connected with the upper end of the mounting base.

[0013] As a further embodiment of the present application, the upper end of the mounting base is fixedly connected with an abutting inner pipe, and the right end of the abutting inner pipe is fixedly connected with an abutting outer pipe.

[0014] As a further further of the scheme, the testing mechanism comprises a second elastic telescopic pipe, the second elastic telescopic pipe is fixedly connected to the left end of the inner wall of the first elastic telescopic pipe, the end of the second elastic telescopic pipe away from the first elastic telescopic pipe is fixedly connected with a connecting block, the inner wall of the connecting pipe is slidably connected with a plurality of abutting plates, each abutting plate is fixedly connected with the connecting block through a connecting arm.

[0015] As a further further of the scheme, the outer wall of the connecting pipe is also provided with a plurality of openings, one end of each opening close to the inner wall of the connecting pipe is in abutment with the outer wall of a corresponding abutting plate, and the outer wall of the connecting pipe is fixedly connected with a plurality of corrugated sleeves, each corrugated sleeve is in communication with a corresponding opening.

[0016] As a further further of the scheme, the inside of the corrugated sleeve is fixedly connected with a third spring, one side of each abutting plate away from the inner wall of the connecting pipe is provided with an abutting block, the outer wall of the abutting block is in abutment with the abutting plate, and the abutting block and the abutting plate are further rotatably connected through a plurality of swing arms with reset function, all the abutting blocks are fixedly connected through a pulling block, the pulling block and the mounting base are fixedly connected through a pulling rope, and the outer wall of the pulling rope is slidably arranged in the inside of the connecting pipe.

[0017] As a further further of the scheme, the fixing mechanism comprises two matching plates, two curved grooves are formed in the front end of each matching plate, four moving plates are arranged between the two matching plates, a moving column and a matching column are fixedly connected to one end of each moving plate close to the matching plate, the outer wall of each moving column and matching column is slidably connected with the inner wall of a corresponding curved groove, and each matching column is fixedly connected with a corresponding matching plate through a fourth spring.

[0018] As a further further of the scheme, a fourth elastic telescopic pipe and a connecting pipe are arranged between the two matching plates, the fourth elastic telescopic pipe and the connecting pipe are fixedly communicated through a rubber pipe, and the fourth elastic telescopic pipe and the connecting pipe are respectively fixedly connected with two corresponding moving plates.

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

[0020] Compared with the prior art, the present application has the following advantages:

[0021] 1、This test device can accurately extrude the nickel-titanium alloy pipe through the pressure intelligent sensor, quantitatively obtain the hardness data of the alloy pipe, intuitively understand the resistance of the alloy pipe under different pressures, accurately determine the maximum hardness that the alloy pipe can withstand, and at the same time, inject liquid water into the alloy pipe and apply pressure, which can simulate the working condition of the alloy pipe under internal pressure in the actual application scene, so as to test the maximum pressure that the alloy pipe can withstand. Through the two test methods, not only can the mechanical properties of the nickel-titanium alloy pipe be comprehensively evaluated, the accuracy and reliability of the test results can be greatly improved, data support can be provided for optimizing the production process of the alloy pipe and ensuring product quality, safety accidents caused by performance defects can be effectively avoided, use risks can be reduced, and the application potential of the nickel-titanium alloy pipe in the field of medical treatment, aerospace and other fields with strict requirements on material performance can be expanded.

[0022] 2、When the present application is used, the internal pressure and the external pressure are applied at the same time, which greatly improves the test efficiency and greatly saves the test time and cost. The two test methods are verified with 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 more comprehensively and deeply evaluated, and internal structural defects of the material can be found in time.

[0023] 3、The pressure intelligent sensor can more accurately measure the pressure that the nickel-titanium alloy pipe can withstand, and achieve smaller error. DETAILED DESCRIPTION

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

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

[0026] Figure 3 It is an internal structure schematic view of the first elastic expansion pipe in the performance testing device for nickel-titanium alloy production.

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

[0028] Figure 5 It is an internal structure schematic view of the connecting pipe in the performance testing device for nickel-titanium alloy production.

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

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

[0031] Figure 8 It is a schematic view of the position structure of the connecting pipe for a performance testing device for nickel-titanium alloy production.

[0032] In the figure: 1, electric hydraulic rod; 2, mounting base; 3, mounting support; 4, mounting pad; 5, sliding frame; 6, sliding bar; 7, abutting outer pipe; 8, abutting inner pipe; 9, corrugated sleeve; 10, pull rope; 11, connecting pipe; 12, second spring; 13, first elastic expansion pipe;

[0033] 14, pressure intelligent sensor; 15, second elastic expansion pipe; 16, abutting plate; 17, connecting block; 18, abutting block; 19, pulling block; 20, third spring; 21, opening; 22, scale block; 23, swing arm; 25, curved groove; 26, matching plate; 27, moving plate; 28, fourth spring;

[0034] 29, abutting round plate; 30, third elastic expansion pipe; 31, fourth elastic expansion pipe; 33, clamping pipe; 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 technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0036] Embodiment one: please refer to Figures 1-2 As shown in the figure, in the embodiments of the present application, a performance testing device for nickel-titanium alloy production, comprising a mounting base 2, the bottom of the mounting base 2 is fixedly connected with a mounting support 3, the bottom of the mounting support 3 is fixedly connected with a plurality of mounting pads 4, the mounting pads 4 are made of silica gel material, have good elasticity, can well reduce the vibration generated by the mounting base 2 and the mounting support 3, increase the friction between the mounting support 3 and the ground, the upper end of the mounting base 2 is fixedly connected with an electric hydraulic rod 1 through bolts, the output end of the electric hydraulic rod 1 is fixedly installed with an extrusion mechanism 201 capable of extruding the nickel-titanium alloy pipe, the mounting base 2 and the electric hydraulic rod 1 are also fixedly installed with a testing mechanism 301 capable of testing the nickel-titanium alloy pipe, the upper end of the mounting base 2 is also fixedly installed with a fixing mechanism 101 capable of limiting the nickel-titanium alloy pipe, when the nickel-titanium alloy pipe is tested and extruded and bent, the fixing mechanism 101 can adjust with the deformation of the nickel-titanium alloy pipe;

[0037] Embodiment two: please refer to Figures 2-6As shown, the pressing mechanism 201 comprises a connecting pipe 11 made of tempered glass, which can be well observed from the inside, the outer wall of the connecting pipe 11 is fixedly connected with the output end of the electric hydraulic rod 1 through bolts, the end of the connecting pipe 11 away from the electric hydraulic rod 1 is fixedly connected with a first elastic expansion pipe 13, the first elastic expansion pipe 13 and the connecting pipe 11 are both filled with liquid water, the end of the first elastic expansion pipe 13 away from the connecting pipe 11 is fixedly connected with a pressure intelligent sensor 14, the pressure intelligent sensor 14 is in a cylindrical shape, the inner wall of the first elastic expansion pipe 13 is fixedly installed with a second spring 12, the second spring 12 can drive the first elastic expansion pipe 13 to quickly reset, the bottom of the connecting pipe 11 is slidingly connected with the upper end of the mounting base 2;

[0038] Specifically, the outer wall of the connecting pipe 11 is fixedly connected with a sliding frame 5, the upper end of the mounting base 2 is fixedly connected with two sliding bars 6, the two sliding bars 6 are symmetrically distributed in front of and behind the upper end of the mounting base 2, the bottom of the sliding frame 5 is provided with two sliding openings, the two sliding openings are symmetrically distributed in front of and behind the bottom of the sliding frame 5, the inner wall of each sliding opening is slidingly connected with the outer wall of the corresponding sliding bar 6, when the connecting pipe 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 pipe 11 through the sliding openings, also has the effect of guiding, improves the stability of the sliding frame 5 and the connecting pipe 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, which greatly reduces the friction between the sliding opening and the sliding bar 6, prolongs the service life of the sliding opening and the sliding bar 6;

[0039] The testing mechanism 301 comprises a second elastic telescopic pipe 15 fixedly connected to the left end of the inner wall of the first elastic telescopic pipe 13, the outer wall of the second elastic telescopic pipe 15 is arranged in the second spring 12, the end of the second elastic telescopic pipe 15 away from the first elastic telescopic pipe 13 is fixedly connected with a connecting block 17, the inner wall of the connecting pipe 11 is slidably connected with a plurality of abutting plates 16, the outer wall of each abutting plate 16 is fixedly connected with a scale block 22, which is used for facilitating the staff to observe the moving distance of the abutting plate 16, the plurality of abutting plates 16 are circumferentially distributed in the inner wall of the connecting pipe 11, each abutting plate 16 is fixedly connected with the connecting block 17 through a connecting arm, the outer wall of the connecting pipe 11 is also provided with a plurality of openings 21, the plurality of openings 21 are circumferentially distributed on the outer wall of the connecting pipe 11, the end of each opening 21 close to the inner wall of the connecting pipe 11 is abutted with the outer wall of the corresponding abutting plate 16, the outer wall of the connecting pipe 11 is fixedly connected with a plurality of corrugated sleeves 9, the corrugated sleeves 9 are made of rubber material, have good elasticity, and also have good corrosion resistance and high temperature resistance characteristics, are durable, and the plurality of corrugated sleeves 9 are also circumferentially distributed on the outer wall of the connecting pipe 11, the upper end of the mounting base 2 is fixedly connected with an abutting inner pipe 8, the right end of the abutting inner pipe 8 is fixedly connected with an abutting outer pipe 7, the abutting outer pipe 7 and the abutting inner pipe 8 are located on the left side of the connecting pipe 11, each corrugated sleeve 9 is in communication with the corresponding opening 21, the inner portion of the corrugated sleeve 9 is fixedly connected with a third spring 20, the elastic coefficient of the second spring 12 is greater than that of the third spring 20, each abutting plate 16 away from the inner wall of the connecting pipe 11 is provided with an abutting block 18, the outer wall of the abutting block 18 is abutted with the abutting plate 16, the abutting block 18 and the abutting plate 16 are also rotatably connected through a plurality of swing arms 23 having a reset function, the swing arm 23 and the abutting plate 16 are clamped with a reset torsional spring;

[0040] All the abutting blocks 18 are fixedly connected through a pulling block 19, the pulling block 19 is made of rubber material, a plurality of weight-reducing openings are formed in the outer wall of the pulling block 19, the plurality of weight-reducing openings are circumferentially distributed on the outer wall of the pulling block 19, the pulling block 19 and the mounting base 2 are fixedly connected through a pulling rope 10, the pulling rope 10 is made of plastic material, has high strength, good toughness, wear resistance, chemical corrosion resistance and light weight, has good adaptability, and the outer wall of the pulling rope 10 is slidably arranged in the inner portion of the connecting pipe 11.

[0041] Please refer to Figure 2 、 Figure 3 、 Figure 7 、 Figure 8As shown, the fixing mechanism 101 comprises two matching plates 26, two curved grooves 25 are formed at the front end of each matching plate 26, the curved grooves 25 are symmetrically distributed on the outer wall of the matching plate 26, the curved grooves 25 are "curved", four moving plates 27 are arranged between the two matching plates 26, one end of each moving plate 27 close to the matching plate 26 is fixedly connected with a moving column 36 and a matching column 37, the outer wall of each moving column 36 and matching column 37 is slidably connected with the inner wall of the corresponding curved groove 25, each matching column 37 is fixedly connected with the corresponding matching plate 26 through the fourth spring 28, the elastic coefficient of the fourth spring 28 is only used to pull and reset the matching column 37 and the moving plate 27, the resulting tension is too small to be ignored, a fourth elastic expansion pipe 31 and a connecting pipe 35 are arranged between the two matching plates 26, the fourth elastic expansion pipe 31 and the connecting pipe 35 are symmetrically distributed between the two matching plates 26, the fourth elastic expansion pipe 31 and the connecting pipe 35 are fixedly communicated with the connecting pipe 11 through the rubber pipe, the fourth elastic expansion pipe 31 and the connecting pipe 35 are respectively fixedly connected with the corresponding two moving plates 27, the upper end of the connecting pipe 35 is fixedly connected with a clamping pipe 33, the outer wall diameter of the clamping pipe 33 is smaller than the inner wall diameter of the nickel-titanium alloy pipe to be measured, so when the nickel-titanium alloy pipe is inserted into the outer wall of the clamping pipe 33, the outer wall of the clamping pipe 33 is tightly attached to the inner wall of the nickel-titanium alloy pipe, which can limit and fix the nickel-titanium alloy pipe, and an automatic valve 34 is fixedly installed at the upper end of the clamping pipe 33;

[0042] A first spring is fixedly installed in the fourth elastic expansion pipe 31, the elastic coefficient of the first spring is greater than the pressure coefficient of the liquid water in the first elastic expansion pipe 13 and the connecting pipe 11, the bottom of the fourth elastic expansion pipe 31 is fixedly connected with a third elastic expansion pipe 30, the bottom of the third elastic expansion pipe 30 is fixedly connected with an abutting circular plate 29, when the nickel-titanium alloy pipe is clamped on the outer wall of the clamping pipe 33, at this time the liquid water will enter the fourth elastic expansion pipe 31, the fourth elastic expansion pipe 31 is elongated to drive the third elastic expansion pipe 30 and the abutting circular plate 29 into the nickel-titanium alloy pipe, when the output end of the fourth elastic expansion pipe 31 abuts against the upper end of the nickel-titanium alloy pipe and cannot be elongated, the liquid water in the clamping pipe 33 will be discharged from the automatic valve 34 into the nickel-titanium alloy pipe, when the liquid water enters the nickel-titanium alloy pipe, it will push the abutting circular plate 29 upward, when the third elastic expansion pipe 30 is contracted to the limit, the abutting circular plate 29 can block the upper end of the nickel-titanium alloy pipe;

[0043] A water inlet is formed in the outer wall of the connecting pipe 11, a pressure valve is installed in the water inlet, when it is necessary to fill the liquid water in the connecting pipe 11 and the first elastic expansion pipe 13, the water inlet is filled with water through a high-pressure pump, which will enter the connecting pipe 11 and the first elastic expansion pipe 13, the high-pressure pump will open the pressure valve and supplement the liquid water in the connecting pipe 11 and the first elastic expansion pipe 13.

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

[0045] When the present application is used, the nickel-titanium alloy pipe is detached to the outer wall of the clamping pipe 33, at this time the electric hydraulic rod 1 is started, the electric hydraulic rod 1 will drive the connecting pipe 11 to move together with the first elastic telescopic pipe 13, when the outer wall of the pressure intelligent sensor 14 and the outer wall of the nickel-titanium alloy pipe abut, the pressure inside the first elastic telescopic pipe 13 and the connecting pipe 11 is very large, the state of the first elastic telescopic pipe 13 at this time is that the pressure of the internal liquid water is too large to be stretched, which indicates that the second spring 12 inside the first elastic telescopic pipe 13 at this time is in a state of being stretched and stored, the first elastic telescopic pipe 13 is squeezed at this time, the liquid water inside the first elastic telescopic pipe 13 will enter the inside of the fourth elastic telescopic pipe 31, the fourth elastic telescopic pipe 31 is extended, the fourth elastic telescopic pipe 31 drives the third elastic telescopic pipe 30 and the abutting circular plate 29 to move into the nickel-titanium alloy pipe, when the first elastic telescopic pipe 13 continues to shrink, the automatic valve 34 at this time is automatically opened, the liquid water inside the connecting pipe 35 will enter the nickel-titanium alloy pipe through the automatic valve 34, it is worth noting that every time the electric hydraulic rod 1 drives the first elastic telescopic pipe 13 and the connecting pipe 11 to move, the moving distance is limited, when the first elastic telescopic pipe 13 detects that the force of extruding the outer wall of the nickel-titanium alloy pipe through the pressure intelligent sensor 14 reaches the set range, it will stop extruding the nickel-titanium alloy pipe, when the first elastic telescopic pipe 13 continues to be squeezed, the liquid water will pressurize the inside of the nickel-titanium alloy pipe, the pressure intelligent sensor 14 will further extrude the outer wall of the nickel-titanium alloy pipe, it is worth noting that the abutting plate 16 at this time does not abut with the outer wall of the opening 21, and also has a plugging effect on the opening 21, when the nickel-titanium alloy pipe does not change, it indicates that the nickel-titanium alloy pipe is full of high-pressure liquid inside, and is still extruded by high strength without deformation, which indicates that the quality of the nickel-titanium alloy pipe is not a problem;

[0046] When the nickel-titanium alloy pipe cannot withstand the high-pressure liquid inside, the nickel-titanium alloy pipe at this time breaks, the liquid water will be sprayed out, the automatic valve 34 at this time will be automatically closed, since the liquid water between the first elastic telescopic pipe 13 and the connecting pipe 11 is released, the first elastic telescopic pipe 13 will shrink, the first elastic telescopic pipe 13 will drive the connecting block 17 to move through the abutting plate 16, the connecting block 17 will abut with the outer wall of the opening 21 through the abutting plate 16, the liquid water inside the first elastic telescopic pipe 13 and the connecting pipe 11 will enter all the corrugated sleeves 9, the corrugated sleeves 9 will absorb the liquid water when resetting, preventing the liquid water from continuing to leak out, that is, it can be concluded that the quality of the nickel-titanium alloy pipe is a problem;

[0047] When the nickel-titanium alloy pipe does not leak but bends, it indicates that the electric hydraulic rod 1 is still driving the connecting pipe 11 and the first elastic telescopic pipe 13 and the pressure intelligent sensor 14 to continue to move when the nickel-titanium alloy pipe bends. Since the pull rope 10 is connected between the pulling block 19 and the mounting base 2, when the connecting pipe 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 towards the center at this time, the pulling block 19 will be deformed and will not be affected, and the abutting blocks 18 will be separated from the abutting plate 16. At this time, the liquid water in the connecting pipe 11 and the first elastic telescopic pipe 13 will enter the corrugated sleeve 9, preventing the liquid water from further spreading. It can be known from the above that the quality of the nickel-titanium alloy pipe is problematic. When the nickel-titanium alloy pipe bends, since the upper and lower ends of the nickel-titanium alloy pipe are respectively abutted with the outer walls of the fourth elastic telescopic pipe 31 and the clamping pipe 33, the fourth elastic telescopic pipe 31 and the clamping pipe 33 will be driven to move. The fourth elastic telescopic pipe 31 drives the corresponding two moving plates 27 to move, and the moving plates 27 slide in the inner wall of the bending groove 25 through the moving column 36 and the matching column 37.

[0048] When the measurement is completed, the electric hydraulic rod 1 drives the connecting pipe 11 and the first elastic telescopic pipe 13 to reset, so that the first elastic telescopic pipe 13 loses the extrusion at this time. The fourth elastic telescopic pipe 31 drives the third spring 20 and the abutting circular plate 29 to reset, and the automatic valve 34 is automatically closed. When the outer wall of the corrugated sleeve 9 abuts with the inner wall of the abutting outer pipe 7, it gradually moves into the abutting inner pipe 8. The corrugated sleeve 9 will shrink, and the liquid water in the corrugated sleeve 9 will enter the first elastic telescopic pipe 13 and the connecting pipe 11. At this time, water is injected into the connecting pipe 11 and the first elastic telescopic pipe 13 through the water inlet. When the first elastic telescopic pipe 13 resets, the first elastic telescopic pipe 13 drives the second elastic telescopic pipe 15 and the connecting block 17 to reset, the connecting block 17 drives the abutting plate 16 to reset, and the abutting plate 16 abuts with the outer wall of the opening 21. At this time, the second test can be performed.

[0049] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A device for testing the properties of nickel-titanium alloys for production, comprising a mounting base (2), characterised in that, The bottom of the mounting base (2) is fixedly connected with a mounting support (3), the upper end of the mounting base (2) is fixedly connected with an electric hydraulic rod (1), the output end of the electric hydraulic rod (1) is fixedly installed with an extrusion mechanism (201) capable of extruding the nickel-titanium alloy pipe, the mounting base (2) and the electric hydraulic rod (1) are further fixedly installed with a testing mechanism (301) capable of testing the nickel-titanium alloy pipe, and the upper end of the mounting base (2) is further fixedly installed with a fixing mechanism (101) capable of limiting the nickel-titanium alloy pipe; when the nickel-titanium alloy pipe is tested and extruded and bent, the fixing mechanism (101) can be adjusted along with the deformation of the nickel-titanium alloy pipe; The extrusion mechanism (201) comprises a connecting pipe (11), the outer wall of the connecting pipe (11) is fixedly connected with the output end of the electric hydraulic rod (1), one end of the connecting pipe (11) away from the electric hydraulic rod (1) is fixedly connected with a first elastic telescopic pipe (13), the first elastic telescopic pipe (13) and the connecting pipe (11) are both filled with liquid water, and the output end of the first elastic telescopic pipe (13) away from the connecting pipe (11) is fixedly connected with a pressure intelligent sensor (14); The testing mechanism (301) comprises a second elastic telescopic pipe (15), the second elastic telescopic pipe (15) is fixedly connected to the inner wall left end of the first elastic telescopic pipe (13), the output end of the second elastic telescopic pipe (15) away from the first elastic telescopic pipe (13) is fixedly connected with a connecting block (17), and the inner wall of the connecting pipe (11) is slidably connected with a plurality of abutting plates (16), each abutting plate (16) is fixedly connected with the connecting block (17) through a connecting arm; The outer wall of the connecting pipe (11) is further provided with a plurality of openings (21), and the end of each opening (21) close to the inner wall of the connecting pipe (11) is in abutment with the outer wall of a corresponding abutting plate (16); The fixing mechanism (101) comprises two matching plates (26), two curved grooves (25) are formed in the front end of each matching plate (26), and four moving plates (27) are arranged between the two matching plates (26); Fourth elastic telescopic pipes (31) and connecting pipes (35) are arranged between the two matching plates (26), the fourth elastic telescopic pipes (31) and the connecting pipes (35) are fixedly communicated with the connecting pipe (11) through rubber pipes, and the fourth elastic telescopic pipes (31) and the connecting pipes (35) are fixedly connected with the corresponding two moving plates (27) respectively; The upper end of the connecting pipe (35) is fixedly connected with 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 pipe (31) is fixedly connected with a third elastic telescopic pipe (30), and the bottom of the third elastic telescopic pipe (30) is fixedly connected with an abutting circular plate (29).

2. The device for testing the performance of a nickel-titanium alloy production according to claim 1, wherein, A second spring (12) is fixedly installed on the inner wall of the first elastic telescopic pipe (13), and the bottom of the connecting pipe (11) is slidably connected with the upper end of the mounting base (2).

3. The device for testing the performance of a nickel-titanium alloy production according to claim 1, wherein, The upper end of the mounting base (2) is fixedly connected with an abutting inner pipe (8), and the right end of the abutting inner pipe (8) is fixedly connected with an abutting outer pipe (7).

4. The device for testing the performance of a nickel-titanium alloy production according to claim 1, wherein, The outer wall of the connecting pipe (11) is fixedly connected with a plurality of corrugated sleeves (9), and each corrugated sleeve (9) is in communication with a corresponding opening (21).

5. The device for testing the performance of a nickel-titanium alloy production according to claim 4, wherein, The inner part of the corrugated sleeve (9) is fixedly connected with a third spring (20), one side of each abutting plate (16) away from the inner wall of the connecting pipe (11) is provided with an abutting block (18), the outer wall of the abutting block (18) abuts against the abutting plate (16), the abutting block (18) and the abutting plate (16) are further rotationally connected through a plurality of swing arms (23) with a reset function, all the abutting blocks (18) are fixedly connected through a pulling block (19), the pulling block (19) and the mounting base (2) are fixedly connected through a pulling rope (10), and the outer wall of the pulling rope (10) is slidably arranged in the inner part of the connecting pipe (11).

6. The device for testing the performance of a nickel-titanium alloy production according to claim 1, wherein, Each mobile plate (27) is fixedly connected with a mobile column (36) and a matching column (37) at one end close to the matching plate (26), the outer wall of each mobile column (36) and matching column (37) is slidably connected with the inner wall of a corresponding curved groove (25), and each matching column (37) is fixedly connected with a fourth spring (28) between the corresponding matching plate (26).

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