CN113155978A - Electromagnetic ultrasonic probe positioning and placing device - Google Patents
Electromagnetic ultrasonic probe positioning and placing device Download PDFInfo
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- CN113155978A CN113155978A CN202110451151.9A CN202110451151A CN113155978A CN 113155978 A CN113155978 A CN 113155978A CN 202110451151 A CN202110451151 A CN 202110451151A CN 113155978 A CN113155978 A CN 113155978A
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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
- G01N29/26—Arrangements for orientation or scanning by relative movement of the head and the sensor
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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
- G01N29/24—Probes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/26—Scanned objects
- G01N2291/269—Various geometry objects
- G01N2291/2691—Bolts, screws, heads
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- Life Sciences & Earth Sciences (AREA)
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Abstract
The invention discloses an electromagnetic ultrasonic probe positioning and placing device, which comprises a coaxial sleeve joint: a first hollow portion and a second hollow portion; the first hollow part and the second hollow part are sleeved to form an axially-through rotary structure; the free end of the first hollow part is sleeved on the hexagonal bolt head in a floating mode; the electromagnetic ultrasonic probe is inserted from a port on the free end of the second hollow part and is abutted to the end surface of the bolt head; the first hollow part and the second hollow part are axially and elastically supported by a spring; the first hollow part and the second hollow part are matched through a pin and a guide groove to realize axial telescopic guiding and limiting. The structure is stable and reliable, the probe matching head and the bolt matching head can be combined according to the type of the used probe and the type of the tested bolt, and various testing conditions are met. The electromagnetic ultrasonic probe contacts the end face of the bolt head from the inside of the device, so that the placement precision of the electromagnetic ultrasonic probe is improved, and the axis of the probe and the axis of the bolt are close to coincide as much as possible; the repeated placement of the probe can achieve higher repeated precision; the magnetic attraction of the probe can be greatly reduced, the probe is convenient to operate, and the service life of the probe is prolonged.
Description
Technical Field
The invention relates to the technical field of electromagnetic ultrasonic detection, in particular to an electromagnetic ultrasonic probe positioning and placing device for assisting positioning and magnetic attraction offset of an electromagnetic ultrasonic probe during bolt measurement.
Background
The method for detecting the bolt (including but not limited to axial force, cracks, length, temperature and the like) by using the electromagnetic ultrasonic technology has the characteristics of no need of a coupling agent in the detection process and low requirement on the surface of the bolt, and is an efficient detection method. When the electromagnetic ultrasonic probes are placed at the two ends of the bolt, in order to ensure the accuracy of a measuring result and high repetition precision, the placing positions of the probes are required to be aligned with the axis of the bolt as much as possible; in addition, the electromagnetic ultrasonic probe has strong magnetism, protruding characters such as bolt manufacturer marks and batch numbers can be formed on the surface of the bolt, the probe is often placed and moved on the bolt head, a protective layer of the probe is easily worn out, and the service life of the probe is shortened.
Because the permanent magnet attraction of the permanent magnet electromagnetic ultrasonic probe (EMAT) is larger, when the probe is placed by hands, one corner is generally selected to contact the end face of the bolt first, and then the detection surface of the probe is slowly attached to the end face of the bolt. With the probe thus positioned, the probe central axis is offset significantly from the bolt axis, requiring the probe to be slowly moved to align the axis with the bolt axis. In the moving process, the protective layer at the bottom of the probe rubs with the raised position of the end face of the bolt; the strong magnetic attraction can press the protruding position of the end face of the bolt into the protective layer at the bottom of the probe. The probe is susceptible to damage during such use and may cause some scratching of the bolt surface. In addition, because the magnetic attraction is large, the probe can be taken down only by overcoming the magnetic attraction with large force, and the clamping injury or the bruising injury is easily caused by improper force.
Disclosure of Invention
According to the technical scheme, the positioning and placing device for the electromagnetic ultrasonic probe solves the problems of positioning, placing and adapting of the bolt in the electromagnetic ultrasonic detection process.
What relate to in this scheme: the utility model provides an electromagnetic ultrasonic probe location placer, includes that the coaxial is cup jointed: a first hollow portion and a second hollow portion.
The first hollow part and the second hollow part are sleeved to form an axially-through rotary structure;
the free end of the first hollow part is sleeved on the bolt head in a floating mode, and the electromagnetic ultrasonic probe is inserted into a port in the free end of the second hollow part and abuts against the end face of the bolt head.
The first hollow part and the second hollow part are axially and elastically supported by a spring;
the first hollow part and the second hollow part are matched through a pin and a guide groove to realize axial telescopic guiding and limiting.
The second hollow part and the first hollow part can be combined according to the type of the used electromagnetic ultrasonic probe and the type of the tested bolt, and various testing conditions are met.
Preferably, the first hollowness includes: a first mating end of the floating sleeve on the bolt head and a second mating end of the insert sleeve in the second hollow portion.
Preferably, the second hollow portion includes: a lower port sleeved on the second mating end; the upper port of the second hollow part and the central axis hole of the second matching end form a matching hole for matching the electromagnetic ultrasonic probe. The accuracy of the electromagnetic ultrasonic probe on the end face of the bolt is improved through axial matching, so that the axis of the electromagnetic ultrasonic probe is close to the axial direction of the bolt and is overlapped; the repeated placement of the probe can achieve higher repeated precision.
Preferably, the first mating end is inserted in the second hollow portion and is elastically supported by a spring in the second hollow portion. When the device is used for placing the electromagnetic ultrasonic probe, the spring is compressed, and a force F3 opposite to the magnetic attraction force is given to the electromagnetic ultrasonic probe, so that the force F2 of the bolt end face acting on the probe end face is equal to the magnetic attraction force F1 minus the spring elastic force F3, namely F2 = F1-F3, when F3 is close to F1, F2 is very small, the abrasion and the impact of the electromagnetic ultrasonic probe are reduced, the probe is protected, and the abrasion is reduced; if not this device, the bolt terminal surface acts on the power F2 of probe terminal surface and equals magnetic attraction F1, and magnetic attraction F1 is great when, causes impact and wearing and tearing easily to electromagnetism ultrasonic probe bottom.
Preferably, the first hollow portion includes a guide slot therein which opens parallel to the axial direction thereof, and a pin is inserted through the wall thickness of the second hollow portion into the guide slot with a sliding fit. Under the spring force effect, can produce axial relative displacement between first well kenozooecium and the second well kenozooecium, the spacing problem of this removal can be solved in the matching of spacing pin and guide slot, also can provide certain locking effect simultaneously.
Preferably, the spring and the electromagnetic ultrasonic probe are in a coaxial nested matching relationship, and the inner diameter of the spring is larger than the outer diameter of the electromagnetic ultrasonic probe. The setting of spring is not restricted to single coaxial telescope form, also can rotate through the less spring of many diameters and arrange and reach this effect, and it is more reliable and more stable to show this scheme in spring and the coaxial telescope compound mode of electromagnetism ultrasonic probe, arranges the convenience moreover.
Preferably, the elastic force of the spring is less than or equal to the magnetic attraction force of the electromagnetic ultrasonic probe on the end face of the bolt head.
Preferably, the first mating end is of a sleeve construction to match the hexagonal bolt head and the sleeve includes open sides. The open head is favorable to weight reduction, observation probe placement condition and can insert the hexagon head of bolt more conveniently.
Preferably, the upper port of the second hollow part comprises a circle of steps to limit the axial assembly of the electromagnetic ultrasonic probe.
Preferably, the wall of the second hollow portion is provided with a threaded hole for engagement with a pin.
Preferably, the first mating end of the second hollow portion includes, but is not limited to, a mating hexagonal bolt, and may be mated by machining the first mating end to a corresponding formation when inspecting bolt heads of other shapes. Thus, the first mating end can be shaped to fit correspondingly to the contour of the bolt head.
Preferably, the sleeve structure at the first mating end is also not limited to being open to the opposite side, and any position may form the opening.
The invention has the advantages that:
1. the structure is stable and reliable, the probe matching head and the bolt matching head can be combined according to the type of the used probe and the type of the tested bolt, and various testing conditions are met.
2. The electromagnetic ultrasonic probe is inserted into the device from the probe matching head, so that when the probe matching head is held by hand to take off the electromagnetic ultrasonic probe, the probe can be taken off only by small force, the operation is convenient, and the service life of the probe can be prolonged.
3. The electromagnetic ultrasonic probe contacts the end surface of the bolt head from the inside of the device, so that the placement precision of the electromagnetic ultrasonic high probe on the end surface of the bolt can be improved, and the axial line of the probe is close to the axial direction of the bolt and is overlapped as much as possible; the repeated placement of the probe can achieve higher repeated precision.
Drawings
The invention is further described with reference to the following figures and examples:
FIG. 1 is a block diagram of an electromagnetic ultrasound probe positioning and placement device of the present invention;
FIG. 2 is a cross-sectional view of the electromagnetic ultrasound probe positioning and placement device of the present invention;
FIG. 3 is a diagram of a state of detecting a hexagonal bolt head of a bolt by using an electromagnetic ultrasonic probe positioning and placing device;
FIG. 4 is a cross-sectional view of a hexagonal bolt head being inspected using an electromagnetic ultrasonic probe position-placement device;
FIG. 5 is a diagram of a bolt stud end being detected by an electromagnetic ultrasonic probe locating and placing device;
FIG. 6 is a cross-sectional view of a bolt stud end being inspected using an electromagnetic ultrasonic probe position-placement device;
wherein: 1. a bolt matching head; 11. a first mating end; 12. a second mating end; 2. a probe matching head; 3. an electromagnetic ultrasonic probe; 4. a bolt; 5. a compression spring; 6. a limit pin; 7. a guide groove; 8. a thin nut.
Detailed Description
Example 1:
the utility model provides an electromagnetic ultrasonic probe location placer, includes that the coaxial is cup jointed: a first hollow portion and a second hollow portion; the first hollow part and the second hollow part are sleeved to form an axially-through rotary structure.
In this embodiment, the first hollow portion is a bolt mating head 1, and the second hollow portion is a probe mating head 2.
The bolt matching head 1 includes: a first mating end 11 of the floating sleeve on the hexagonal bolt head, a second mating end 12 of the insert in the second hollow. The first mating end 11 is a hexagonal sleeve structure that matches the hexagonal bolt head, and a pair of side faces in the hexagonal sleeve are open openings.
The probe matching head 2 includes: a lower port sleeved on the second mating end 12 and an upper port for inserting the electromagnetic ultrasonic probe 3.
The bolt matching head 1 and the probe matching head 2 are coaxially sleeved, and an assembly hole for assembling the electromagnetic ultrasonic probe is formed by the upper port of the probe matching head 2 and the middle shaft hole of the second matching end 12.
Specifically, as shown in fig. 1 and 2, the lower end of the bolt matching head 1 is the free end thereof, and the upper end of the probe matching head 2 is the free end thereof. Therefore, the free end of the bolt matching head 1 is sleeved on the hexagonal bolt head in a floating mode, and the electromagnetic ultrasonic probe 3 is inserted into a port on the free end of the probe matching head 2 and abuts against the end face of the bolt head (see fig. 3 and 4).
The bolt matching head 1 and the probe matching head 2 are elastically supported in the axial direction through a spring, and in the embodiment, the spring is a compression spring 5. As shown in fig. 2, the first mating end 11 of the bolt mating head 1 is inserted into the probe mating head 2, and the end surface of the first mating end 11 is elastically supported by the compression spring 5 in the probe mating head 2. The compression spring 5 and the electromagnetic ultrasonic probe 3 are in a coaxial nested matching relationship, and the inner diameter of the compression spring 5 is larger than the outer diameter of the electromagnetic ultrasonic probe 3.
The bolt matching head 1 and the probe matching head 2 are matched through a limiting pin 6 and a guide groove 7 to realize axial telescopic guiding and limiting, and specifically, a second matching end 12 of the bolt matching head 1 comprises the guide groove 7 which is arranged in parallel to the axial direction of the bolt matching head on the rotating surface; the limiting pin 6 penetrates through the wall thickness of the lower port of the probe matching head 2 and is inserted into the guide groove 7 to form sliding fit. The wall surface of the lower port of the probe matching head 2 is provided with a screw hole, and the limit pin 6 is assembled with the screw hole through thread matching.
Example 2:
the device mainly comprises a bolt matching head 1, a probe matching head 2, a compression spring 5 and a limit pin 6.
The bolt matching head 1 is structurally shown in fig. 1, and the contour matched with the bolt head is a part of a regular hexagon (namely a hexagonal sleeve structure), the size of the contour is matched with the size of the bolt hexagon head, and certain tolerance is left.
The hexagonal sleeve structure has two opposite sides which are open structures, so that the weight is reduced, the placement condition of the probe is observed, and the hexagonal head of the bolt is inserted more conveniently.
The cylindrical surface of the bolt matching head 1 matched with the probe matching head 2 is provided with two guide grooves 7 for limiting and guiding between two parts.
The structure of the probe matching head 2 is shown in fig. 1, the size of the inner diameter step of the probe matching head 2 is matched with the size of the electromagnetic ultrasonic probe 3, so that the corresponding electromagnetic ultrasonic probe 3 can be inserted into the probe matching head 2 from the upper part of the probe matching head 2, and can be blocked by the step after being installed in place.
The cylindrical surface of the probe matching head 2 is provided with two threaded holes, and two limiting pins 6 can be arranged and matched with a guide groove 7 on the bolt matching head 1 to complete limiting and guiding functions; the outer surface of the probe matching head 2 is a knurled surface, so that the probe matching head is convenient to hold by a hand.
The compression spring 5 is installed between the bolt matching head 1 and the probe matching head 2 as shown in fig. 1. The design of the compression spring 5 is such that the pitch and wire diameters do not interfere with the device and the sensor.
The elastic coefficient and the compression length of the compression spring 5 meet the requirement that the magnetic attraction force F1 is close to the spring elasticity F3 (the magnetic attraction force is slightly larger than the spring elasticity) when the probe is adsorbed on the surface of the bolt.
As shown in fig. 5 and 6, when the electromagnetic ultrasonic probe 3 needs to be installed at the end face of one end of the stud of the bolt 4, 1 thin nut 8 (such as a GB6172 series nut) can be screwed on the bolt to make the end face of the nut flush with the end face of the bolt, and then the present device is used.
The electromagnetic ultrasonic probe 3 contacts the end face of the bolt head from the inside of the device, so that the placement precision of the electromagnetic ultrasonic high probe 3 on the end face of the bolt can be improved, and the axial line of the electromagnetic ultrasonic probe 3 is close to the axial direction of the bolt to coincide with the axial direction of the bolt as much as possible; meanwhile, the electromagnetic ultrasonic probe 3 can be repeatedly placed to achieve higher repeated precision.
Because the compression spring 5 is arranged between the bolt matching head 1 and the probe matching head 2, the compression spring 5 is compressed, and a force F3 opposite to the magnetic attraction force is given to the electromagnetic ultrasonic probe 3, so that the force F2 of the bolt end face acting on the probe end face is equal to the magnetic attraction force F1 minus the spring elasticity F3, namely F2 = F1-F3, when F3 is close to F1, F2 is very small, the abrasion and the impact of the probe are reduced, the probe is protected, and the abrasion is reduced; without the device, the force F2 of the bolt end face acting on the probe end face is equal to the magnetic attraction force F1, and when the magnetic attraction force F1 is large, the bottom of the probe is easily impacted and abraded.
The electromagnetic ultrasonic probe 3 is inserted into the device from the probe matching head 2, so that when the probe matching head 2 is held by hands to take off the electromagnetic ultrasonic probe, the probe can be taken off only by small force, and the operation is convenient.
The probe matching head 2 and the bolt matching head 1 can be combined according to the type of the used probe and the type of the tested bolt, and various testing conditions are met.
In the process that the electromagnetic ultrasonic probe 3 is close to the bolt, the change of the adsorption force of the electromagnetic ultrasonic probe 3 along with the distance is usually exponential change, and the elastic force of the compression spring 5 is linear change. Through the design of the compression spring 5, the electromagnetic ultrasonic probe 3 can have a distance in which the elastic force is greater than the suction force in the approaching process, and the electromagnetic ultrasonic probe 3 continuously descends along with the inertia, but the speed is reduced, so that the impact of the electromagnetic ultrasonic probe 3 can be greatly reduced.
The embodiments are merely illustrative of the principles and effects of the present invention, and do not limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical concepts disclosed herein be covered by the appended claims.
Claims (10)
1. Electromagnetic ultrasonic probe location placer, including coaxial cup jointing: a first hollow portion and a second hollow portion; the method is characterized in that:
the first hollow part and the second hollow part are sleeved to form an axially-through rotary structure;
the free end of the first hollow part is sleeved on the bolt head in a floating way; the electromagnetic ultrasonic probe is inserted from a port on the free end of the second hollow part and is abutted to the end surface of the bolt head;
the first hollow part and the second hollow part are axially and elastically supported by a spring;
the first hollow part and the second hollow part are matched through a pin and a guide groove to realize axial telescopic guiding and limiting.
2. The electromagnetic ultrasound probe positional placement device of claim 1, wherein: the first hollow portion includes: a first mating end of the floating sleeve on the bolt head, a second mating end of the insert sleeve in the second hollow portion.
3. The electromagnetic ultrasound probe positional placement device of claim 2, wherein: the second hollow portion includes: a lower port sleeved on the second mating end; the upper port of the second hollow part and the central axis hole of the second matching end form a matching hole for matching the electromagnetic ultrasonic probe.
4. The electromagnetic ultrasound probe positional placement device of claim 2, wherein: the first mating end is inserted and sleeved in the second hollow part and is elastically supported by a spring in the second hollow part.
5. The electromagnetic ultrasound probe positional placement device of claim 1, wherein: the first hollow part comprises the guide groove which is arranged in parallel to the axial direction of the first hollow part; a pin is inserted through the wall thickness of the second hollow portion into the guide slot forming a sliding fit.
6. The electromagnetic ultrasound probe positional placement device of claim 4, wherein: the spring and the electromagnetic ultrasonic probe are in a coaxial nested matching relationship, and the inner diameter of the spring is larger than the outer diameter of the electromagnetic ultrasonic probe.
7. The electromagnetic ultrasound probe positional placement device of claim 1, wherein: the elastic force of the spring is less than or equal to the magnetic attraction force of the electromagnetic ultrasonic probe on the end face of the bolt head.
8. The electromagnetic ultrasound probe positional placement device of claim 2, wherein: the first mating end is a sleeve structure that matches the bolt head and includes an open side in the sleeve.
9. The electromagnetic ultrasound probe positional placement device of claim 1, wherein: and a circle of steps are arranged in the upper port of the second hollow part to axially assemble and limit the electromagnetic ultrasonic probe.
10. The electromagnetic ultrasound probe positional placement device of claim 1, wherein: and a threaded hole is formed in the wall of the second hollow part and used for being matched with the pin.
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| CN202110451151.9A CN113155978B (en) | 2021-04-26 | 2021-04-26 | Electromagnetic ultrasonic probe positioning and placing device |
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| CN202110451151.9A CN113155978B (en) | 2021-04-26 | 2021-04-26 | Electromagnetic ultrasonic probe positioning and placing device |
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Cited By (2)
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| CN114719161A (en) * | 2022-06-01 | 2022-07-08 | 苏州博昇科技有限公司 | High-strength bolt axial force automatic inspection device and automatic inspection method |
| CN115343368A (en) * | 2022-08-31 | 2022-11-15 | 大连理工大学 | Ultrasonic detection clamp for disc-drum interface rigidity of aero-engine |
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| CN115343368A (en) * | 2022-08-31 | 2022-11-15 | 大连理工大学 | Ultrasonic detection clamp for disc-drum interface rigidity of aero-engine |
| CN115343368B (en) * | 2022-08-31 | 2024-05-31 | 大连理工大学 | Ultrasonic detection clamp for interface rigidity of disk drum of aeroengine |
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| Publication number | Publication date |
|---|---|
| CN113155978B (en) | 2022-12-06 |
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