CN109541033B - Tooth bottom fatigue crack ultrasonic detection device - Google Patents
Tooth bottom fatigue crack ultrasonic detection device Download PDFInfo
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- CN109541033B CN109541033B CN201811402591.XA CN201811402591A CN109541033B CN 109541033 B CN109541033 B CN 109541033B CN 201811402591 A CN201811402591 A CN 201811402591A CN 109541033 B CN109541033 B CN 109541033B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/11—Analysing solids by measuring attenuation of acoustic waves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/223—Supports, positioning or alignment in fixed situation
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- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The embodiment of the invention relates to a tooth bottom fatigue crack ultrasonic detection device, which comprises: the device comprises a sample table base (1), a miniature speed regulating motor (2), a plurality of telescopic three-jaw spring clamp arms (3), an ultrasonic detection probe (4), an ultrasonic flaw detector (5) and an annular toothed part (6) to be detected; one end of the miniature speed regulating motor (2) is fixed on the sample stage base (1), the other end of the miniature speed regulating motor (2) is connected with the plurality of telescopic three-jaw spring clamp arms (3), an ultrasonic detection probe (4) is arranged on one of the plurality of telescopic three-jaw spring clamp arms (3), one end of the ultrasonic detection probe (4) is connected with the ultrasonic flaw detector (5), the plurality of telescopic three-jaw spring clamp arms (3) fix the annular toothed part (6) to be detected, and the sample stage base (1) is made of an aluminum alloy material; the size of the tooth bottom fatigue crack of the annular toothed component can be rapidly and accurately determined, and rapid and accurate field detection can be realized.
Description
Technical Field
The embodiment of the invention relates to the field of tooth bottom detection, in particular to an ultrasonic detection device for tooth bottom fatigue cracks.
Background
The floating support ring-shaped toothed part is a key basic element for realizing gear switching and power transmission of a transmission system, has the characteristics of high relative rotating speed, compact structure, large transmission power and the like, and is widely used on various automobiles and engineering vehicles. In the running process of a vehicle, the tooth part of the annular toothed component and the tooth part of the inner hub are impacted and collided, and after the vehicle runs for a period of time, the annular toothed component can be broken, so that the running state of the vehicle is seriously influenced.
Fracture analysis shows that fatigue fracture is initiated on the bottom surface of the tooth bottom. The analysis of the working environment of the annular toothed part shows that the fatigue fracture is the most common failure mode of the annular toothed part, the tooth bottom of the annular toothed part belongs to a weak area and bears the maximum alternating stress load, the periodic stress exceeds the bending fatigue limit of a gear material, the tooth root part is subjected to fatigue crack and gradually expands, and the fatigue fracture can occur when the rest part cannot bear external load. The generation of fatigue cracks is related to factors such as the structural design, materials and machining processes of the gear, in addition to the load to which the gear is subjected. If the fatigue crack of the gear teeth can be found as early as possible in the fault detection of the equipment, the fatigue broken tooth fault can be effectively prevented in time, and major equipment accidents and production accidents are prevented.
However, because of the large number of teeth of the annular toothed part, the degree of freedom is large, and the structure is more complicated compared with a common fixed-axis gear transmission system. Meanwhile, the floating support impact load borne by the annular toothed component is random, and the difference of the floating support annular toothed component causes the annular toothed component to have larger dispersion coefficient, poorer comparability and lower data reliability in a real-vehicle state. If the floating annular toothed component is returned to the factory for maintenance regularly, the processes of returning to the factory, decomposing, checking, assembling, trial run, qualified delivery and the like are long in period and high in cost.
Disclosure of Invention
The embodiment of the invention provides an ultrasonic detection device for tooth bottom fatigue cracks, which can realize real-time reflection of the tooth bottom fatigue cracks of an annular toothed component.
In a first aspect, an embodiment of the present invention provides an ultrasonic testing apparatus for tooth bottom fatigue crack, including:
the device comprises a sample table base 1, a miniature speed regulating motor 2, a plurality of telescopic three-jaw spring clamp arms 3, an ultrasonic detection probe 4, an ultrasonic flaw detector 5 and an annular toothed part 6 to be detected;
wherein, the one end of miniature buncher 2 is fixed in on the sample platform base 1, the other end of miniature buncher 2 is with a plurality of scalable three-jaw spring arm lock 3 is connected, and is a plurality of be provided with ultrasonic detection probe 4 on one in scalable three-jaw spring arm lock 3, ultrasonic detection probe 4's one end with ultrasonic flaw detector 5 is connected, and is a plurality of scalable three-jaw spring arm lock 3 will it is fixed to await measuring the annular and take tooth part 6.
In one possible embodiment, the endless toothed member (6) is a friction plate or a gear; the ultrasonic detection probe 4 is an angle-adjustable probe.
In a possible embodiment, the ultrasonic flaw detector 5 is used for receiving the signals detected by the ultrasonic detection probe 4 and displaying real-time reflected signal waveforms, and is provided with a real object reference block to accurately reflect the length of the crack.
In one possible embodiment, the display mode of the ultrasonic flaw detector 5 is an a-scan mode, the abscissa displayed by the display of the ultrasonic flaw detector 5 is the propagation time or propagation distance of the ultrasonic wave in the detected material, and the ordinate is the amplitude of the ultrasonic wave reflected wave.
In a possible embodiment, the position and the length of the crack source can be rapidly judged by comparing the calibrated crack length through the real object reference block displayed by the ultrasonic flaw detector 5.
In a possible embodiment, the ultrasonic detection probe 4 is parallel to the tangential direction of the annular toothed member 6 to be measured.
In one possible embodiment, the extension range of the retractable three-jaw spring clamp arm 3 is as follows: 200mm-500 mm.
In one possible embodiment, the end of the retractable three-jaw spring clamping arm 3 is provided with an angle-adjustable clamp, and the rotation angle of the clamp is as follows: 0 to 90 degrees.
In a possible embodiment, the ultrasonic detection probe 4 is fixed to the end of the retractable three-jaw spring clamp arm 3 by the clamp.
In one possible embodiment, the rotation speed of the miniature speed regulating motor 2 is 0.1r/min-5.0 r/min.
According to the tooth bottom fatigue crack ultrasonic detection device provided by the embodiment of the invention, a telescopic three-jaw spring clamping arm of a sample platform is used for fixing an annular toothed part to be detected, a detection probe is fixed on a clamp at the tail end of the clamping arm, a proper angle is adjusted, and an ultrasonic flaw detector and a rotating motor are started to perform tooth bottom crack test; because the sample platform and the ultrasonic flaw detector are flexible, light and convenient to carry, the in-situ tooth bottom crack detection can be carried out under various conditions, the tooth bottom fatigue crack size of the annular toothed component can be rapidly and accurately determined, and the rapid and accurate on-site detection can be realized.
Drawings
Fig. 1 is a schematic structural diagram of an ultrasonic testing apparatus for fatigue crack at tooth bottom according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
For the convenience of understanding of the embodiments of the present invention, the following description will be further explained with reference to specific embodiments, which are not to be construed as limiting the embodiments of the present invention.
Fig. 1 is a schematic structural diagram of an ultrasonic testing apparatus for fatigue crack at tooth bottom according to an embodiment of the present invention, as shown in fig. 1, the apparatus specifically includes:
the device comprises a sample table base 1, a miniature speed regulating motor 2, a plurality of telescopic three-jaw spring clamp arms 3, an ultrasonic detection probe 4, an ultrasonic flaw detector 5 and an annular toothed part 6 to be detected;
wherein, the one end of miniature buncher 2 is fixed in on the sample platform base 1, the other end of miniature buncher 2 is with a plurality of scalable three-jaw spring arm lock 3 is connected, and is a plurality of be provided with ultrasonic detection probe 4 on one in scalable three-jaw spring arm lock 3, ultrasonic detection probe 4's one end with ultrasonic flaw detector 5 is connected, and is a plurality of scalable three-jaw spring arm lock 3 will it is fixed to await measuring the annular and take tooth part 6.
Specifically, the sample platform base 1 and the telescopic three-jaw spring clamp arm 3 are made of aluminum alloy materials, and the working temperature is normal temperature.
Optionally, the endless toothed member (6) is a friction plate or a gear; the ultrasonic detection probe 4 is an angle-adjustable probe.
Optionally, the ultrasonic flaw detector 5 is configured to receive the signal detected by the ultrasonic detection probe 4 and display a real-time reflected signal waveform, and is provided with a real object reference block to accurately reflect the crack length.
Alternatively, the display mode of the ultrasonic flaw detector 5 is an a-scan mode, the abscissa displayed by the display of the ultrasonic flaw detector 5 is the propagation time or propagation distance of the ultrasonic wave in the detected material, and the ordinate is the amplitude of the ultrasonic wave reflected wave.
Optionally, the position and length of the crack source can be rapidly determined by comparing the calibrated crack length with the real object reference block displayed by the ultrasonic flaw detector 5.
Optionally, the ultrasonic detection probe 4 is parallel to a tangential direction of the to-be-detected annular toothed member 6.
Optionally, the telescopic range of the telescopic three-jaw spring clamping arm 3 is as follows: 200mm-500 mm.
Optionally, the terminal 3 ends of scalable three-jaw spring arm lock are provided with the clip that the angle is adjustable, the rotation angle of clip is: 0 to 90 degrees.
Optionally, the ultrasonic detection probe 4 is fixed at the end of the retractable three-jaw spring clamping arm 3 through the clamp.
Optionally, the rotation speed of the micro speed regulating motor 2 is 0.1r/min-5.0 r/min.
The principle of the tooth bottom fatigue crack ultrasonic detection device is as follows: a detection probe of the ultrasonic flaw detector is connected as a signal input end, and the angle of the probe is adjustable; the other end of the probe is connected with an ultrasonic flaw detector, a display is used as a signal output end, signal waveforms are reflected in real time, when ultrasonic waves enter a tested material, the ultrasonic waves are reflected on an interface of two media with different acoustic impedances, and the size of the reflected energy is related to the difference of the acoustic impedances of the media on the two sides of the interface and the orientation and the size of the interface, so that the cracking of the tooth bottom is reflected.
According to the tooth bottom fatigue crack ultrasonic detection device provided by the embodiment of the invention, a telescopic three-jaw spring clamping arm of a sample platform is used for fixing an annular toothed part to be detected, a detection probe is fixed on a clamp at the tail end of the clamping arm, a proper angle is adjusted, and an ultrasonic flaw detector and a rotating motor are started to perform tooth bottom crack test; because the sample platform and the ultrasonic flaw detector are flexible, light and convenient to carry, the in-situ tooth bottom crack detection can be carried out under various conditions, the tooth bottom fatigue crack size of the annular toothed component can be rapidly and accurately determined, and the rapid and accurate on-site detection can be realized.
Those of skill would further appreciate that the various illustrative components and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (6)
1. An ultrasonic testing device for fatigue crack at tooth bottom, comprising:
the device comprises a sample table base (1), a miniature speed regulating motor (2), a plurality of telescopic three-jaw spring clamp arms (3), an ultrasonic detection probe (4), an ultrasonic flaw detector (5) and an annular toothed part (6) to be detected;
one end of the miniature speed regulating motor (2) is fixed on the sample stage base (1), the other end of the miniature speed regulating motor (2) is connected with the plurality of telescopic three-jaw spring clamp arms (3), an ultrasonic detection probe (4) is arranged on one of the plurality of telescopic three-jaw spring clamp arms (3), one end of the ultrasonic detection probe (4) is connected with the ultrasonic flaw detector (5), the plurality of telescopic three-jaw spring clamp arms (3) fix the annular toothed part (6) to be detected, and the sample stage base (1) is made of an aluminum alloy material;
the ultrasonic flaw detector (5) is used for receiving the signals detected by the ultrasonic detection probe (4) and displaying real-time reflected signal waveforms, and is provided with a real object comparison test block to accurately reflect the length of the crack;
the position and the length of the crack source can be rapidly judged by comparing the calibrated crack length through the real object reference block displayed by the ultrasonic flaw detector (5);
the display mode of the ultrasonic flaw detector (5) is an A scanning mode, the abscissa displayed by the display of the ultrasonic flaw detector (5) is the propagation time or the propagation distance of ultrasonic waves in a detected material, and the ordinate is the amplitude of ultrasonic reflected waves;
the ultrasonic detection probe (4) is parallel to the tangential direction of the annular toothed component (6) to be detected.
2. Device according to claim 1, characterized in that the endless toothed member (6) is a friction plate or a gear;
the ultrasonic detection probe (4) is an angle-adjustable probe.
3. Device according to claim 1, characterized in that the extension and retraction range of the retractable three-jaw spring clamp arm (3) is: 200mm-500 mm;
wherein, the telescopic three-jaw spring clamping arm (3) is made of aluminum alloy material.
4. Device according to claim 1, characterized in that the telescopic three-jaw spring clamp arm (3) is provided at its end with an angularly adjustable clamp, the angle of rotation of which is: 0 to 90 degrees.
5. Device according to claim 4, characterized in that said ultrasonic detection probe (4) is fixed to the end of said retractable three-jaw spring clamp arm (3) by means of said clamp.
6. The device according to claim 1, characterized in that the rotation speed of the micro speed regulating motor (2) is 0.1r/min-5.0 r/min.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811402591.XA CN109541033B (en) | 2018-11-23 | 2018-11-23 | Tooth bottom fatigue crack ultrasonic detection device |
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| CN201811402591.XA CN109541033B (en) | 2018-11-23 | 2018-11-23 | Tooth bottom fatigue crack ultrasonic detection device |
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| CN109541033A CN109541033A (en) | 2019-03-29 |
| CN109541033B true CN109541033B (en) | 2021-01-15 |
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| CN202974951U (en) * | 2012-11-26 | 2013-06-05 | 桂林电子科技大学 | Ultrasonic automatic detection system |
| CN204989112U (en) * | 2015-08-28 | 2016-01-20 | 昆明理工大学 | Annular work piece ultrasonic detection transmission |
| CN105259210B (en) * | 2015-09-30 | 2017-11-10 | 中国人民解放军装甲兵工程学院 | A kind of clipping ultrasonic action device and ultrasonic IR thermal imaging inspection system |
| CN106290582B (en) * | 2016-08-03 | 2018-08-24 | 中南大学 | A kind of Ultrasonic C-Scan course corrections method considering workpiece bias clamping error |
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