Titanium alloy bar microcrack detection device for ultrasonic scalpel

Abstract

The utility model relates to the related technical field of titanium and titanium alloy bar defect detection, in particular to a titanium alloy bar microcrack detection device for an ultrasonic scalpel, which comprises a support frame and a thermal infrared imager mounted on the support frame, and a bar is placed in an imaging range of the thermal infrared imager; the conversion assembly is installed on the supporting frame and detachably connected with the end of the bar; the ultrasonic power supply is mounted on the supporting frame and connected with the conversion assembly; according to the utility model, the high-frequency ultrasonic wave transmitted by the conversion assembly is utilized to cause vibration of the bar on the bar, when the ultrasonic wave is transmitted to the crack, the contact surfaces of the crack rub with each other to cause temperature rise of the crack area, and the thermal infrared imager can monitor the temperature change of the surface of the bar in real time. Meanwhile, collected signals are transmitted to a computer, so that whether crack defects exist on the bar or not is detected, the crack position is obtained, and rapid detection of the crack position and size of the bar is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field related to defect detection of titanium and titanium alloy bars, in particular to a titanium alloy bar micro-crack detection device for an ultrasonic scalpel. Background Art

[0002] Titanium and titanium alloys have the advantages of high specific strength, excellent corrosion resistance, good biocompatibility, etc. After more than 50 years of research and development, they are widely used in aviation, aerospace, ships, nuclear industry, petroleum, chemical industry, medical and other fields. With the combination of ultrasonics and medical applications, ultrasonic therapy technology has been promoted to clinical applications. Ultrasonic scalpel is an important application of ultrasonic therapy and has been widely used in surgical operations. The working principle of ultrasonic scalpel is to convert the electrical energy provided by the ultrasonic generator into high-frequency mechanical vibration through the ultrasonic transducer, and then amplify the amplitude of the mechanical vibration through the ultrasonic horn, and transmit the amplified mechanical vibration to the shank and the head part connected to the horn, and finally contact the biological tissue to achieve the function of cutting tissue. Ultrasonic scalpel has the characteristics of low frequency, large amplitude, and continuous operation. It also has the advantages of high precision, neat surgical incision, fast hemostasis, small thermal burn area, and less smoke generation.

[0003] At present, the most commonly used material for ultrasonic scalpels is TC4ELI titanium alloy. The working frequency of the commonly used cutting and hemostasis ultrasonic scalpels in clinical practice is mostly 55Hz, which is in a high-frequency vibration working state of 5.5×104 times per second, with an amplitude of about 55μm. The cycle frequency is high and the time is short. It is easy to cause metal fatigue, resulting in the breakage of the surgical blade and medical accidents. The production of titanium and titanium alloy bars has gone through smelting, forging, rolling, finishing and other processes. The processing flow is long and the production process is complex, which is prone to various micro defects. Most of the micro defects exist in the early stage of fatigue damage, accounting for about 80% of the entire fatigue life of the material, leading to major accident hazards. Therefore, the non-destructive testing of materials for titanium alloy bars used in ultrasonic scalpels is quite strict, otherwise it is easy to cause medical accidents such as broken knives due to fatigue.

[0004] The existing defect detection of titanium and titanium alloy bars mainly adopts ultrasonic detection method, which injects high-frequency ultrasonic waves into the titanium alloy bar to be tested. When encountering crack defects, part of the incident wave will be reflected, and the probe is used to receive the reflected ultrasonic signal to determine the size and position of the defect in the bar. At present, there are corresponding standards at home and abroad, but the defect sizes specified in the detection standards are relatively large, and there is no unified method and standard for the detection of micro defects. The size of titanium and titanium alloy grains will have a certain impact on the detection results, resulting in the inability to obtain reliable detection results for the specific location and size of the defects. In addition, in order to ensure the comprehensiveness of the detection, every area on the surface of the alloy bar must be scanned, resulting in long detection time and low work efficiency. Utility Model Content

[0005] The utility model aims to provide a titanium alloy bar micro-crack detection device for an ultrasonic surgical knife to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A titanium alloy bar micro-crack detection device for an ultrasonic surgical knife, comprising:

[0008] A support frame and an infrared thermal imager mounted on the support frame, wherein the rod is placed within the imaging range of the infrared thermal imager;

[0009] A conversion assembly, mounted on the support frame and detachably connected to the end of the rod;

[0010] An ultrasonic power supply is installed on the support frame and connected to the conversion assembly;

[0011] The computer establishes communication with the infrared thermal imager.

[0012] The titanium alloy rod microcrack detection device for ultrasonic surgical knife as described above: the conversion assembly includes a transducer and an amplitude transformer fixedly mounted on the support frame, and the transducer is fixedly connected to the amplitude transformer.

[0013] The titanium alloy rod micro-crack detection device for ultrasonic surgical knife as described above: a conductive wire is connected between the transducer and the ultrasonic power supply.

[0014] The titanium alloy rod micro-crack detection device for ultrasonic surgical knife as described above: a threaded rod is rotatably mounted on the end of the amplitude transformer.

[0015] A threaded hole is formed at the end of the rod.

[0016] The titanium alloy rod micro-crack detection device for ultrasonic surgical knife as described above: the threaded rod extends into the threaded hole and is threadedly connected to the rod.

[0017] The titanium alloy rod micro-crack detection device for ultrasonic surgical knife as described above: the threaded rod is detachably connected to a locking piece, and the locking piece is arranged along the axial direction of the threaded rod.

[0018] The titanium alloy rod microcrack detection device for ultrasonic surgical knife as described above: the locking part includes two wedge-shaped washers that mesh with each other, and serrations are formed inside and outside the washers. When locked, the small teeth outside the washers will be embedded in the surface of the amplitude transformer or the rod, and the large teeth inside the washers will mesh with each other.

[0019] Compared with the prior art, the beneficial effects of the utility model are as follows: by starting the ultrasonic power supply, the conversion component converts the electric energy transmitted by the ultrasonic power supply into high-frequency vibration and transmits it to the rod to be detected, and uses high-frequency ultrasonic waves to act on the rod to cause the rod to vibrate. Once there is a crack defect in the rod, when the ultrasonic wave is transmitted to the crack, the mutual friction between the crack contact surfaces causes the temperature of the crack area to rise. The infrared thermal imager can monitor the temperature changes on the surface of the rod in real time, and transmit the collected signals to the computer at the same time. By analyzing the infrared thermal wave sequence images, it is possible to detect whether there is a crack defect on the rod and obtain the crack position, thereby realizing rapid detection of the crack position and size of the rod, and the reliability of defect detection is significantly increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of a titanium alloy bar microcrack detection device for ultrasonic scalpels.

[0021] Figure 2 This is a plan view of a device for detecting micro-cracks in titanium alloy bars used in ultrasonic surgical knives.

[0022] Figure 3 This is a diagram of the crack defect in the titanium alloy bar microcrack detection device for ultrasonic scalpels.

[0023] Figure 4 This is a diagram of the pit defect in the titanium alloy bar microcrack detection device for ultrasonic surgical knives.

[0024] In the figure: 1. Computer; 2. Ultrasonic power supply; 3. Transducer; 4. Amplitude transformer; 5. Infrared thermal imager; 6. Rod; 7. Support frame. DETAILED DESCRIPTION

[0025] Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0026] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0027] In addition, in order to better illustrate the present application, numerous specific details are provided in the specific embodiments below. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, and elements well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0028] See also Figure 1 to Figure 3In an embodiment of the utility model, a titanium alloy rod micro-crack detection device for an ultrasonic surgical knife includes a computer 1, an ultrasonic power supply 2, an infrared thermal imager 5, a support frame 7, and a conversion component.

[0029] The details are as follows;

[0030] See also Figure 1 , Figure 2 , the support frame 7 and the infrared thermal imager 5 installed on the support frame 7, and a rod 6 is arranged within the imaging range of the infrared thermal imager 5;

[0031] The conversion assembly is mounted on the support frame 7 and is detachably connected to the end of the rod 6;

[0032] The ultrasonic power supply 2 is mounted on the support frame 7 and connected to the conversion assembly;

[0033] The computer 1 establishes communication with the infrared thermal imager 5 .

[0034] In detail, in this embodiment, the titanium alloy rod micro-crack detection device for ultrasonic surgical knife described in the utility model is adopted. When in use, the rod 6 is first fixedly connected to the conversion component to ensure that the rod 6 is set within the imaging range of the infrared thermal imager 5, and the ultrasonic power supply 2 is started. The conversion component converts the electric energy transmitted by the ultrasonic power supply 2 into high-frequency vibration and transmits it to the detected rod 6. The high-frequency ultrasonic wave is used to act on the rod 6 to cause the rod 6 to vibrate. Once a crack defect exists in the rod 6, when the ultrasonic wave is transmitted to the crack, the mutual friction between the crack contact surfaces causes the temperature of the crack area to rise. The infrared thermal imager 5 can monitor the temperature change on the surface of the rod 6 in real time, and transmit the collected signal to the computer 1 at the same time. By analyzing the infrared thermal wave sequence image, it is detected whether there is a crack defect on the rod 6 and the crack position is obtained, thereby realizing rapid detection of the crack position and size of the rod 6, and the reliability of defect detection is significantly increased.

[0035] It should be noted that the detection results of the crack defects and pit defects on the surface of the rod 6 are magnified by an industrial magnifying glass, such as Figure 3 and Figure 4 As shown, there are indeed defects.

[0036] Furthermore, the conversion assembly includes a transducer 3 and an horn 4 fixedly mounted on the support frame 7, the transducer 3 is fixedly connected to the horn 4, wherein the ultrasonic power supply 2 transmits the electrical signal to the transducer 3, the transducer 3 converts the electrical signal into mechanical vibration energy, and the horn 4 can cooperate with the ultrasonic transducer 3 to change the ultrasonic vibration amplitude and transmit the high-frequency vibration to the rod 6. In the present invention, the transducer 3 and the horn 4 belong to the prior art, and the present invention will not be redundantly described.

[0037] Preferably, a conductive wire is connected between the transducer 3 and the ultrasonic power supply 2, so that the electrical signal in the ultrasonic power supply 2 is transmitted to the transducer 3, and the transducer 3 completes the conversion of the electrical signal into mechanical vibration energy.

[0038] Preferably, a threaded rod is rotatably mounted on the end of the amplitude transformer 4 .

[0039] Preferably, a threaded hole is formed at the end of the rod 6. When the amplitude change rod 4 is fixed, the rod 6 is controlled to rotate, and when the rotation occurs, a linear motion is made along the axial direction of the threaded rod to achieve a fixed connection between the amplitude change rod 4 and the rod 6, and the disassembly between the amplitude change rod 4 and the rod 6 is not affected.

[0040] Preferably, the threaded rod extends into the threaded hole and is threadedly connected to the rod 6 .

[0041] Specifically, in one embodiment, a locking piece is detachably connected to the threaded rod, and the locking piece is arranged along the axial direction of the threaded rod. During detection, the amplitude converter 4 transmits high-frequency vibration energy to the rod 6, and high-frequency vibration occurs simultaneously at the connection between the rod 6 and the amplitude converter 4. The clamping load of the threaded rod on the rod 6 changes with the extension of the vibration time. In order to prevent the connection between the amplitude converter 4 and the rod 6 from loosening, thereby affecting the detection work of the rod 6, a locking piece is arranged between the amplitude converter 4 and the rod 6 to ensure that the threaded rod never loosens under high-frequency vibration.

[0042] To elaborate, the locking member includes two wedge-shaped washers that mesh with each other, and serrations are formed inside and outside the washers. When locking, the small teeth on the outside of the washers will be embedded in the surface of the variable amplitude rod 4 or the rod 6, and the large teeth inside the washers will mesh with each other. When tightening the threaded rod, the wedge-shaped teeth are locked, and at the same time, the radial fine teeth on the outer surface of the washer will bite the connecting surface of the variable amplitude rod 4 and the rod 6, and form clear embossing marks on the connecting surface of the variable amplitude rod 4 and the rod 6. The threaded rod generates a clamping force to lock the rod 6 in place, and the wedge-shaped locking effect prevents the threaded rod from rotating loose, and is still effective even under the worst conditions. The wedge-shaped washer of this utility model belongs to the prior art, and the utility model will not be described in detail.

[0043] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0044] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A titanium alloy bar microcrack detection device for ultrasonic surgical knife, characterized in that: include; A support frame (7) and an infrared thermal imager (5) mounted on the support frame (7), wherein a rod (6) is arranged within the imaging range of the infrared thermal imager (5); A conversion assembly is mounted on the support frame (7) and is detachably connected to the end of the rod (6); An ultrasonic power source (2) is mounted on the support frame (7) and connected to the conversion assembly; The computer (1) establishes communication with the infrared thermal imager (5).

2. The device for detecting micro-cracks in titanium alloy bars for ultrasonic surgical knives according to claim 1, characterized in that: The conversion assembly comprises a transducer (3) and an amplitude transformer (4) fixedly mounted on the support frame (7); the transducer (3) is fixedly connected to the amplitude transformer (4).

3. The device for detecting micro-cracks in titanium alloy bars for ultrasonic surgical knives according to claim 2, characterized in that: A conductive wire is connected between the transducer (3) and the ultrasonic power supply (2).

4. The device for detecting micro-cracks in titanium alloy bars for ultrasonic surgical knives according to claim 2, characterized in that: A threaded rod is rotatably mounted on the end of the amplitude transformer (4).

5. The device for detecting micro-cracks in titanium alloy bars for ultrasonic surgical knives according to claim 4, characterized in that: A threaded hole is formed at the end of the rod (6).

6. The device for detecting micro-cracks in titanium alloy bars for ultrasonic surgical knives according to claim 5, characterized in that: The threaded rod extends into the threaded hole and is threadedly connected to the rod (6).

7. The device for detecting micro-cracks in titanium alloy bars for ultrasonic surgical knives according to claim 4, characterized in that: A locking piece is detachably connected to the threaded rod, and the locking piece is arranged along the axial direction of the threaded rod.

8. The device for detecting micro-cracks in titanium alloy bars for ultrasonic surgical knives according to claim 7, characterized in that: The locking member comprises two mutually meshing wedge-shaped washers, wherein saw teeth are formed inside and outside the washers. When locked, the small teeth outside the washers will be embedded in the surface of the amplitude transformer (4) or the rod (6), and the large teeth inside the washers will mesh with each other.

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