Ultrasonic-based flaw detection device and detection method

Abstract

The invention belongs to the technical field of welding defect detection, and particularly relates to a flaw detection device and method based on ultrasonic waves, the detection device comprises a rotating mechanism, a supporting mechanism, a lifting mechanism and a plurality of detection mechanisms, a to-be-detected workpiece is installed on the rotating mechanism so as to link the to-be-detected workpiece to rotate; a lifting mechanism is connected to the supporting mechanism, a plurality of detection mechanisms are uniformly distributed on the lifting mechanism, and the lifting mechanism is used for adjusting the lifting motion of the detection mechanisms; the plurality of detection mechanisms respectively comprise an ultrasonic probe, and the plurality of ultrasonic probes are respectively arranged over against a welding seam of a to-be-detected workpiece; the angle positions of the ultrasonic probes are adjusted, so that the detection areas of the ultrasonic probes cover different depths of the welding seam, and the welding seam is subjected to ultrasonic detection; the multiple ultrasonic probes are adopted to emit ultrasonic waves from multiple angles to conduct layered flaw detection on the weld joint of the to-be-detected workpiece, the defects in the welding area can be fully detected, and the detection precision is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of welding defect detection, and in particular relates to an ultrasonic flaw detection device and a detection method. Background Art

[0002] Welding defects refer to defects formed in the weld joint during the welding process. Welding defects include pores, slag inclusions, incomplete penetration, lack of fusion, cracks, pits, undercuts, weld bumps, etc. Among these defects, pores and slag inclusions are volume defects. Slag strips, incomplete penetration, lack of fusion and cracks are linear defects, which can also be called surface defects. In order to ensure the quality of the finished welded product, it is usually necessary to perform defect detection on the finished welded product.

[0003] Ultrasonic flaw detection is a type of non-destructive flaw detection. It uses the ability of ultrasound to penetrate deep into metal materials and reflect at the edge of the interface when entering from one section to another to detect defects in parts. When the ultrasonic beam passes from the surface of the part through the probe to the inside of the metal, different reflected waves are generated when it encounters defects and the bottom of the part, thereby analyzing the internal condition of the metal.

[0004] The quality inspection of welded parts is to ensure the integrity, reliability, safety and usability of welded structures. In addition to the requirements for welding technology and welding process, the quality inspection of welded parts is also an important part of the quality management of welded structures. Welding defect detection is mainly destructive testing and non-destructive testing. Destructive testing requires the destruction or damage of products or workpieces to achieve defect detection, so it is rarely used in practical applications. Non-destructive testing uses ultrasonic testing because of its high sensitivity, low cost, short cycle, and high efficiency. It is widely popular. Existing ultrasonic flaw detection is mainly based on plane detection, and there is less detection of shaft parts such as gears, which limits the wider promotion and application of ultrasonic flaw detection.

[0005] In view of this, it is necessary to improve the defects of the prior art to overcome the deficiencies in practical applications. Summary of the invention

[0006] Based on the above-mentioned shortcomings and deficiencies in the prior art, one of the objects of the present invention is to at least solve one or more of the above-mentioned problems in the prior art. In other words, one of the objects of the present invention is to provide an ultrasonic-based flaw detection device and detection method that meets one or more of the above-mentioned needs.

[0007] In order to achieve the above-mentioned object of the invention, the present invention adopts the following technical solutions:

[0008] The present invention provides an ultrasonic flaw detection device, comprising a rotating mechanism, a supporting mechanism, a lifting mechanism and a plurality of detection mechanisms, wherein a workpiece to be detected is installed on the rotating mechanism to link the workpiece to be detected with the rotating movement; the supporting mechanism is connected to the lifting mechanism, a plurality of the detection mechanisms are evenly installed on the lifting mechanism, and the lifting mechanism is used to adjust the lifting movement of the detection mechanisms; the plurality of the detection mechanisms respectively comprise ultrasonic probes, and the plurality of the ultrasonic probes are respectively arranged facing the welds of the workpiece to be detected;

[0009] The angle positions of the plurality of ultrasonic probes are adjusted so that the detection areas of the plurality of ultrasonic probes cover different depths of the weld, so as to perform ultrasonic detection on the weld.

[0010] As a preferred embodiment, the detection mechanism also includes a divider, a probe fixing block, a voice coil motor, a positioning plate and a manual slide, the voice coil motor and the divider are installed on the positioning plate, the probe fixing block is connected to the divider, the ultrasonic probe is installed on the probe fixing block, and the manual slide is installed on the positioning plate.

[0011] As a preferred solution, a guide rail is provided on the positioning plate, the indexer is slidably matched with the guide rail, and the voice coil motor drives the indexer to move up and down along the guide rail to link the ultrasonic probe to move up and down synchronously.

[0012] As a preferred solution, the adjustment angle range of each of the detection mechanisms is 0 to 32°.

[0013] As a preferred embodiment, the rotating mechanism includes a base plate, a shock absorbing plate, a driving unit, a centering shaft plate and a positioning shaft. The shock absorbing plate is installed on the base plate, the driving unit is installed on the shock absorbing plate, the positioning shaft is connected to the centering shaft plate, the workpiece to be measured is installed on the centering shaft plate, and the positioning shaft is driven to rotate by the driving unit to link the workpiece to be measured to rotate.

[0014] As a preferred solution, a liquid storage barrel is installed on the centering axis plate, the liquid storage barrel is filled with liquid, the workpiece to be tested is immersed in the liquid, and the ultrasonic probe detects the weld through the liquid.

[0015] As a preferred embodiment, the lifting mechanism includes a first connecting plate, a support column, a second connecting plate, a T-shaped lead screw, a hand wheel and a locking device. The detection mechanism is installed on the second connecting plate. The two ends of the support column are respectively connected to the first connecting plate and the second connecting plate. The T-shaped lead screw passes through the first connecting plate and is connected to the locking device. The locking device is used to lock and fix the T-shaped lead screw. The hand wheel is connected to the locking device.

[0016] As a preferred solution, the support mechanism includes a mounting plate, a positioning seat and a support shaft, and the positioning seat is connected to the support shaft and the mounting plate.

[0017] As a preferred solution, the workpiece to be measured is configured as a circular gear, the weld is arranged along the circumference of the circular gear, and the weld has a certain depth in the vertical direction.

[0018] The present invention also provides an ultrasonic flaw detection method, using the detection device as described in any of the above schemes, comprising the following steps:

[0019] S1, linking several inspection mechanisms to inspect the weld of the workpiece through the lifting mechanism;

[0020] S2, by adjusting the angle positions of the plurality of ultrasonic probes, so that the detection areas of the plurality of ultrasonic probes cover different depths of the weld;

[0021] S3. The workpiece to be tested is linked to rotate by a rotating mechanism, and the weld is inspected by a detection mechanism.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The present invention provides an ultrasonic flaw detection device, which rotates a workpiece to be detected and transmits ultrasonic waves to the weld of the workpiece to be detected by a layered flaw detection method. By using multiple ultrasonic probes to perform layered flaw detection on the weld at multiple angles, it is beneficial to fully detect defects in the welding area. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, drawings of other embodiments can be obtained based on these drawings without creative work.

[0025] Figure 1 1 is a schematic diagram of the overall structure of an ultrasonic flaw detection device according to an embodiment of the present invention;

[0026] Figure 2 is a schematic structural diagram of a rotating mechanism according to an embodiment of the present invention;

[0027] Figure 3 is a structural schematic diagram of a lifting mechanism according to an embodiment of the present invention;

[0028] Figure 4 is a structural schematic diagram of a support mechanism according to an embodiment of the present invention;

[0029] Figure 5is a schematic diagram of a detection mechanism according to an embodiment of the present invention from a first viewing angle;

[0030] Figure 6 is a schematic diagram of a detection mechanism according to an embodiment of the present invention from a second viewing angle;

[0031] Figure 7 is a schematic diagram of a detection mechanism according to an embodiment of the present invention from a third viewing angle;

[0032] Figure 8 is a schematic structural diagram of a workpiece to be tested according to an embodiment of the present invention;

[0033] Fig. 9 yes Figure 8 Cross-sectional view from the middle BB perspective;

[0034] In the figure: 1 rotating mechanism, 11 bottom plate, 12 damping plate, 13 driving part, 14 centering shaft plate, 15 positioning shaft, 16 liquid storage barrel, 2 supporting mechanism, 21 mounting plate, 22 positioning seat, 23 supporting shaft, 24 linear bearing, 3 lifting mechanism, 31 first connecting plate, 32 supporting column, 33 second connecting plate, 34 T-type lead screw, 35 hand wheel, 36 locking device, 4 detecting mechanism, 41 ultrasonic probe, 42 probe fixing block, 43 indexer, 44 voice coil motor, 45 positioning plate, 451 guide rail, 46 manual slide, 5 workpiece to be measured, 51 welding seam. DETAILED DESCRIPTION

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for the description of the embodiments. Obviously, the drawings described below are only some examples or embodiments of the present application. For ordinary technicians in this field, the present application can also be applied to other similar scenarios based on these drawings without creative work. Unless it is obvious from the language environment or otherwise explained, the same reference numerals in the figures represent the same structure or operation.

[0036] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0037] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal", etc. are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present application. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0038] In addition, it should be noted that the use of words such as "first" and "second" to define components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above words have no special meaning and cannot be understood as limiting the scope of protection of this application. In addition, although the terms used in this application are selected from well-known and commonly used terms, some terms mentioned in the specification of this application may be selected by the applicant at his or her discretion, and their detailed meanings are explained in the relevant parts of the description of this article. In addition, it is required to understand this application not only by the actual terms used, but also by the meaning implied by each term.

[0039] According to some embodiments of the present application, please refer to Figures 1 to 9 As shown, an ultrasonic flaw detection device is provided, comprising a rotating mechanism 1, a supporting mechanism 2, a lifting mechanism 3 and a plurality of detection mechanisms 4, wherein a workpiece 5 to be detected is installed on the rotating mechanism 1 to link the workpiece 5 to be detected with the rotating movement; the supporting mechanism 2 is connected to the lifting mechanism 3, and a plurality of detection mechanisms 4 are evenly installed on the lifting mechanism 3, and the lifting mechanism 2 is used to adjust the lifting movement of the detection mechanisms 4; the plurality of detection mechanisms 4 respectively comprise ultrasonic probes 41, and the plurality of ultrasonic probes 41 are respectively arranged facing the welds of the workpiece 5 to be detected; by adjusting the angular positions of the plurality of ultrasonic probes 41, the detection areas of the plurality of ultrasonic probes 41 cover different depths of the welds, so as to perform ultrasonic detection on the welds.

[0040] Specifically, the detection mechanism 4 also includes a divider 43, a probe fixing block 42, a voice coil motor 44, a positioning plate 45 and a manual slide 46. The voice coil motor 44 and the divider 43 are installed on the positioning plate 45, the probe fixing block 42 is connected to the divider 43, the ultrasonic probe 41 is installed on the probe fixing block 42, and the manual slide 46 is installed on the positioning plate 45.

[0041] Furthermore, the ultrasonic probe 41 can be moved in the horizontal direction by adjusting the manual slide 46 , so as to ensure that the ultrasonic probe 41 is attached to the workpiece to be measured to generate ultrasonic waves.

[0042] Furthermore, a guide rail 451 is provided on the positioning plate 45, and the indexer 43 is slidably matched with the guide rail 451. The voice coil motor 44 drives the indexer 43 to move up and down along the guide rail 451, so as to link the ultrasonic probe 41 to move up and down synchronously. The different angles of the indexer are adjusted by rotation to realize the angle adjustment of the ultrasonic probe, and then the ultrasonic probe is used to emit ultrasonic waves aimed at the weld.

[0043] In some embodiments of the present application, the adjustment angle range of each detection mechanism 4 is 0 to 32°. In other words, the angle between the direction of the ultrasonic wave emitted by the ultrasonic probe and the horizontal direction is 0 to 32°.

[0044] In a specific embodiment, the detection mechanism can be configured with three, such as Figure 5 As shown, the first detection mechanism is set to a zero angle, that is, the angle between the ultrasonic direction emitted by the ultrasonic probe and the horizontal direction is 0°. Figure 6 and Figure 7 As shown, the setting angles of the second detection mechanism and the third detection mechanism are equal and opposite, that is, the angle between the direction in which the ultrasonic probe of the second detection mechanism transmits ultrasonic waves and the horizontal direction can be set to +20°, and the angle between the direction in which the ultrasonic probe of the third detection mechanism transmits ultrasonic waves and the horizontal direction can be set to -20°. The three detection mechanisms can cover the weld area of ​​the workpiece to be tested.

[0045] It should be noted that the setting angle of the second detection mechanism can be arbitrarily selected within the range of 0 to 32° according to the depth of the weld. Correspondingly, the setting angle of the third detection mechanism is equal to the setting angle of the second detection mechanism and is opposite in angle.

[0046] In some embodiments of the present application, the rotating mechanism 1 includes a base plate 11, a shock absorbing plate 12, a driving unit 13, a centering shaft plate 14 and a positioning shaft 15. The shock absorbing plate 12 is installed on the base plate 11, the driving unit 13 is installed on the shock absorbing plate 12, the positioning shaft 15 is connected to the centering shaft plate 14, and the workpiece 5 to be measured is installed on the centering shaft plate 14. The positioning shaft 15 is driven to rotate by the driving unit 13 to link the workpiece 5 to be measured to rotate.

[0047] Furthermore, the driving part 13 is configured as a DD motor, and the DD motor is used to provide motive force for the rotation of the workpiece to be measured.

[0048] Furthermore, the damping plate 12 is locked together with the DD motor and the bottom plate 11, so as to prevent the vibration of the DD motor during rotation from affecting the imaging of the ultrasonic probe.

[0049] Furthermore, the centering shaft plate 14 is coaxially assembled with the positioning shaft 15 and the DD motor to ensure the installation concentricity of the workpiece to be measured, thereby preventing the imaging of the ultrasonic probe from being affected due to poor concentricity when the workpiece to be measured rotates.

[0050] Furthermore, a liquid storage barrel 16 is installed on the centering shaft plate 14. The liquid storage barrel 16 is filled with liquid. The workpiece 5 to be tested is immersed in the liquid, and the ultrasonic probe 41 detects the weld through the liquid. The liquid can be water as the medium for ultrasonic testing.

[0051] In some embodiments of the present application, the lifting mechanism 3 includes a first connecting plate 31, a support column 32, a second connecting plate 33, a T-shaped screw 34, a hand wheel 35 and a locker 36. The detection mechanism 4 is installed on the second connecting plate 33. The two ends of the support column 32 are respectively connected to the first connecting plate 31 and the second connecting plate 33. The T-shaped screw 34 passes through the first connecting plate 33 and is connected to the locker 36. The locker 36 is used to lock and fix the T-shaped screw 34. The hand wheel 35 is connected to the locker 36.

[0052] Furthermore, the lifting mechanism 3 is assembled firmly and reliably without looseness to prevent affecting the adjustment of the ultrasonic probe. The lifting mechanism 3 can adjust the lifting movement of the detection mechanism 4 to achieve fine-tuning of the up and down lifting of the ultrasonic probe, which can be done manually or with the addition of power for automatic fine-tuning.

[0053] In some embodiments of the present application, the support mechanism 2 includes a mounting plate 21, a positioning seat 22, a support shaft 23 and a linear bearing 24, the positioning seat 22 is connected to the support shaft 23 and the mounting plate 21, and the linear bearing 24 is guided and matched with the support column 32.

[0054] Furthermore, the positioning seat 22 is assembled firmly and reliably with the support shaft 23 and the mounting plate 21 without looseness to prevent affecting the imaging, and the linear bearing 24 is assembled firmly and reliably with the mounting plate 21 without looseness to prevent affecting the imaging.

[0055] In some embodiments of the present application, Figure 8 and Fig. 9 As shown, the workpiece 5 to be tested is configured as a circular gear, the weld 51 is arranged along the circumference of the circular gear, and the weld 51 has a certain depth in the vertical direction. By ultrasonically detecting weld defects, the unevenness or concave-convexity of the weld surface can be accurately detected.

[0056] According to some embodiments of the present application, there is also provided an ultrasonic flaw detection method, which uses the detection device as described above and includes the following steps:

[0057] S1, linking several inspection mechanisms to inspect the weld of the workpiece through the lifting mechanism;

[0058] S2, by adjusting the angle positions of the plurality of ultrasonic probes, so that the detection areas of the plurality of ultrasonic probes cover different depths of the weld;

[0059] S3. The workpiece to be tested is linked to rotate by a rotating mechanism, and the weld is inspected by a detection mechanism.

[0060] By using multiple ultrasonic probes to detect welds at multiple angles, the welding area can be covered to the greatest extent, the accuracy of weld defect detection can be improved, and the risk of missed detection can be reduced.

[0061] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0062] The above description is only a detailed description of the preferred embodiments and principles of the present application. For ordinary technicians in this field, there will be changes in the specific implementation methods based on the ideas provided by the present invention, and these changes should also be regarded as the scope of protection of the present application.

Claims

1. An ultrasonic flaw detection device, characterized in that: It includes a rotating mechanism, a supporting mechanism, a lifting mechanism and several detecting mechanisms, wherein a workpiece to be tested is installed on the rotating mechanism to link the workpiece to be tested with the rotating movement; the supporting mechanism is connected to the lifting mechanism, and several detecting mechanisms are evenly installed on the lifting mechanism, and the lifting mechanism is used to adjust the lifting movement of the detecting mechanisms; several detecting mechanisms respectively include ultrasonic probes, and several ultrasonic probes are respectively arranged facing the welds of the workpiece to be tested; The angle positions of the plurality of ultrasonic probes are adjusted so that the detection areas of the plurality of ultrasonic probes cover different depths of the weld, so as to perform ultrasonic detection on the weld.

2. The ultrasonic flaw detection device according to claim 1, characterized in that: The detection mechanism also includes a divider, a probe fixing block, a voice coil motor, a positioning plate and a manual slide, the voice coil motor and the divider are installed on the positioning plate, the probe fixing block is connected to the divider, the ultrasonic probe is installed on the probe fixing block, and the manual slide is installed on the positioning plate.

3. The ultrasonic flaw detection device according to claim 2, characterized in that: The positioning plate is provided with a guide rail, the indexer is slidably matched with the guide rail, and the voice coil motor drives the indexer to move up and down along the guide rail, so as to link the ultrasonic probe to move up and down synchronously.

4. The ultrasonic flaw detection device according to claim 1, characterized in that: The adjustment angle range of each detection mechanism is 0 to 32 degrees.

5. The ultrasonic flaw detection device according to claim 1, characterized in that: The rotating mechanism includes a base plate, a shock absorbing plate, a driving unit, a centering shaft plate and a positioning shaft. The shock absorbing plate is installed on the base plate, the driving unit is installed on the shock absorbing plate, the positioning shaft is connected to the centering shaft plate, the workpiece to be measured is installed on the centering shaft plate, and the positioning shaft is driven to rotate by the driving unit to link the workpiece to be measured to rotate.

6. The ultrasonic flaw detection device according to claim 5, characterized in that: A liquid storage barrel is installed on the centering axis plate. The liquid storage barrel is filled with liquid. The workpiece to be tested is immersed in the liquid. The ultrasonic probe detects the weld through the liquid.

7. The ultrasonic flaw detection device according to claim 1, characterized in that: The lifting mechanism includes a first connecting plate, a support column, a second connecting plate, a T-shaped lead screw, a hand wheel and a locking device. The detection mechanism is installed on the second connecting plate. The two ends of the support column are respectively connected to the first connecting plate and the second connecting plate. The T-shaped lead screw passes through the first connecting plate and is connected to the locking device. The locking device is used to lock and fix the T-shaped lead screw. The hand wheel is connected to the locking device.

8. The ultrasonic flaw detection device according to claim 1, characterized in that: The supporting mechanism comprises a mounting plate, a positioning seat and a supporting shaft, and the positioning seat is connected to the supporting shaft and the mounting plate.

9. The ultrasonic flaw detection device according to claim 1, characterized in that: The workpiece to be measured is configured as a circular gear, the weld is arranged along the circumference of the circular gear, and the weld has a certain depth in the vertical direction.

10. An ultrasonic flaw detection method, characterized in that: The detection device according to any one of claims 1 to 9 is used, comprising the following steps: S1, linking several inspection mechanisms to inspect the weld of the workpiece through the lifting mechanism; S2, by adjusting the angle positions of the plurality of ultrasonic probes, so that the detection areas of the plurality of ultrasonic probes cover different depths of the weld; S3. The workpiece to be tested is linked to rotate by a rotating mechanism, and the weld is inspected by a detection mechanism.

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