CN113484422B - Handheld tool for ultrasonic detection of large-plane workpiece - Google Patents
Handheld tool for ultrasonic detection of large-plane workpiece Download PDFInfo
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- CN113484422B CN113484422B CN202110732202.5A CN202110732202A CN113484422B CN 113484422 B CN113484422 B CN 113484422B CN 202110732202 A CN202110732202 A CN 202110732202A CN 113484422 B CN113484422 B CN 113484422B
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- 238000001514 detection method Methods 0.000 title claims abstract description 33
- 239000000523 sample Substances 0.000 claims abstract description 137
- 238000007906 compression Methods 0.000 claims abstract description 12
- 230000006835 compression Effects 0.000 claims abstract description 11
- 230000007246 mechanism Effects 0.000 claims abstract description 11
- 238000007689 inspection Methods 0.000 claims description 4
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 2
- 238000003825 pressing Methods 0.000 abstract description 6
- 230000008859 change Effects 0.000 abstract description 2
- 230000008878 coupling Effects 0.000 abstract description 2
- 238000010168 coupling process Methods 0.000 abstract description 2
- 238000005859 coupling reaction Methods 0.000 abstract description 2
- 238000003708 edge detection Methods 0.000 abstract description 2
- 230000007547 defect Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 3
- 241000203475 Neopanax arboreus Species 0.000 description 3
- 239000007822 coupling agent Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003205 diastolic effect Effects 0.000 description 1
- 210000001145 finger joint Anatomy 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011089 mechanical engineering Methods 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 238000011158 quantitative evaluation Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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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
- G01N29/225—Supports, positioning or alignment in moving situation
- G01N29/226—Handheld or portable devices
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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
- G01N29/265—Arrangements for orientation or scanning by relative movement of the head and the sensor by moving the sensor relative to a stationary material
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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
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
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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
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/028—Material parameters
- G01N2291/0289—Internal structure, e.g. defects, grain size, texture
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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
- G01N2291/10—Number of transducers
- G01N2291/101—Number of transducers one transducer
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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
- G01N2291/263—Surfaces
- G01N2291/2632—Surfaces flat
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The invention relates to a handheld tool for ultrasonic detection of a large-plane workpiece, which can automatically clamp a probe by the pressing force provided by springs arranged on the side surfaces of clamping pieces of two probes; according to the invention, the three support legs are in contact with the surface of the workpiece, and the probe can always maintain the pressing force on the surface of the workpiece and ensure uniform force application through one-dimensional freedom degree in the direction perpendicular to the surface of the workpiece, which is provided by the relaxation of the spring in the scanning mechanism; by means of two rotational degrees of freedom and the compression force of the spring, the probe can adapt to the change of the flatness and flatness of the surface of the workpiece, and better coupling is achieved all the time; the handle of the device enables a detector not to feel tired when detecting; the position of the workpiece can be detected without considering the direction, and the position can be reached; the invention solves the accessibility of workpiece edge detection by utilizing the plane position relation of the probe and the three-jaw support leg; according to the invention, the compression force can be changed by changing the springs with different elastic coefficients, so that the detection device is suitable for detecting the surfaces of workpieces with different flatness.
Description
Technical Field
The invention belongs to the field of mechanical engineering, and particularly relates to a handheld tool for ultrasonic detection of a large-plane workpiece.
Background
The ultrasonic detection method is widely applied to the detection of internal defects of mechanical part raw materials, in the states of manufacturing, using and the like, wherein the equipment and the application of a single probe and a host machine are the most widely. The basic principle is that a probe is arranged on the surface of a workpiece to be detected, fluid media such as engine oil, water, glycerol and the like are used as coupling agents to be coated on the surface of the workpiece, so that the probe is tightly attached to the surface of the workpiece to be detected without macroscopic gaps, a host machine controls the probe to emit ultrasonic waves, the ultrasonic waves enter the workpiece through a coupling agent layer and are reflected back after encountering defects, the ultrasonic waves enter the probe through the coupling agent layer and are transmitted back to the host machine, the host machine processes and analyzes reflected ultrasonic signals, and judges defect information in the workpiece, thereby achieving the purpose of detecting internal defects. The key of the operation is that in the detection process, when the probe slides along the surface of the workpiece, the contact force between the probe and the surface of the workpiece is kept relatively consistent. Currently, two methods of automatic and manual detection are available for workpieces containing planes:
automatic detection technology: the device is mainly a large-scale water-immersed automatic detection device and is arranged in a fixed place, and has the advantages of being capable of realizing rapid automatic detection, and 1. The device is poor in universality, is only suitable for flat-plate workpieces, and can not realize detection on workpieces with non-parallel upper and lower surfaces or workpieces with only one plane; 2. the time and the labor are wasted, before the detection, the workpiece is required to be placed at a designated detection station, and the workpiece placement process is difficult; 3. the convenience is poor, and when the parts are in use, the parts need to be disassembled and then transported to a detection site; 4. because the probe is fixed to move in a two-dimensional plane, the rotation freedom degree cannot be set, and the probe is difficult to be applied to a workpiece with poor flatness; 5. the inspection device requires that the workpiece surface be consistent with a horizontal plane.
(II) manual detection technology: the manual handheld probe is used for detection, and has the advantages of good universality and convenience. The defect is that 1, hold the probe, the magnitude of the compaction force exerted on the probe is uneven, can appear the difference in the quantitative evaluation to the defect, 2, the probe is smaller, can only rely on the fingertip to hold, long-time operation, the knuckle is extremely tired, further influences the accuracy of testing result.
Disclosure of Invention
The invention solves the technical problems that: in order to solve the problems in the existing manual ultrasonic detection, the invention provides a handheld tool for ultrasonic detection of a large-plane workpiece.
The technical scheme of the invention is as follows: a handheld tool for ultrasonic detection of a large-plane workpiece comprises a probe clamping piece, a first spring, a probe bracket, a first connecting support rod, a second connecting support rod, a scanning mechanism and a second spring;
the scanning mechanism comprises a handle, three-jaw support legs and a support rod clamping head, wherein one end of the handle is connected with the support rod clamping head, and the middle part of the handle is connected with the three-jaw support legs; the axis of the supporting rod chuck is mutually perpendicular to the axis of the handle; the inside of the supporting rod clamping head is a cavity, a second spring is coaxially arranged in the cavity, one end of the second spring is fixed through a compression nut, the other end of the second spring is connected with one end of a second connecting supporting rod, and the second connecting supporting rod is connected with the outer wall of the first connecting supporting rod;
one end of the probe support is of a U-shaped structure, the other end of the probe support is of a rod-shaped structure, the rod-shaped structure penetrates through the inner cavity of the first connecting support rod and is connected through a locking nut, and the rod-shaped end can rotate around an axis in the first connecting support rod; the U-shaped structure is provided with a mounting hole at the opening end port;
the two probe clamping pieces are integrally rod-shaped pieces, a first spring is sleeved on the rod body, one end of the rod body is a probe clamping surface, the other end of the rod body is connected through a locking nut after being provided with a mounting hole through an opening end port of the U-shaped structure, and the end can enable the probe clamping pieces to rotate around the axis of the rod body under the action of matching with the mounting hole; the middle of the two probe clamping surfaces is used for clamping the probe.
The invention further adopts the technical scheme that: the first connecting support rod is axially provided with a through hole, and the inner wall of the through hole is radially provided with a groove; a threaded hole is radially formed in the outer wall of the first connecting supporting rod, and the threaded hole is communicated with the through hole.
The invention further adopts the technical scheme that: the rod-shaped end port of the probe support is provided with external threads, the rod wall is axially provided with a bulge, and the bulge is matched with the groove on the first connecting support rod, so that the rotation of the probe support around the inner hole axis of the first connecting support rod is limited.
The invention further adopts the technical scheme that: the U-shaped structure of probe support open end port open have the mounting hole radial open have the recess.
The invention further adopts the technical scheme that: the probe clamping face of the probe clamping piece is an arc face, the arc face is attached to the outer wall of the probe, an external thread is arranged at the end head of the other end of the rod body, a bulge is axially arranged on the side wall, and the bulge is matched with a groove on the probe support, so that the probe clamping piece can rotate along the axis.
The invention further adopts the technical scheme that: the second connecting support rod is integrally a columnar body, the outer wall is in a second-order shape, the small end part is provided with external threads, the small end part is connected with a threaded hole on the side wall of the first connecting rod in a matched mode, the large end side wall is provided with a limiting boss, and the large end side wall is in clearance fit with a groove formed in the inner wall of the support rod clamping head.
The invention further adopts the technical scheme that: and one end of the first spring is contacted with the end face of the clamping end of the probe clamping piece of the probe, and the other end of the first spring is contacted with the end face of the mounting hole formed in the opening end of the U-shaped structure on the probe bracket and is used for providing clamping force for clamping the probe.
The invention further adopts the technical scheme that: the second spring is used for providing contact force for the probe and the surface of the workpiece.
The invention further adopts the technical scheme that: the three-jaw support leg bottom foot end is a spherical contact, so that the handheld tool can slide smoothly on the surface of a workpiece, and a unique contact mode can be provided on the surface of an uneven workpiece.
The invention further adopts the technical scheme that: all parts are made of aluminum alloy.
Effects of the invention
The invention has the technical effects that:
1) The probe can be automatically clamped by the pressing force provided by the springs arranged on the side surfaces of the two probe clamping pieces;
2) According to the detection tool, the three support legs are in contact with the surface of the workpiece, and the probe can always keep the pressing force on the surface of the workpiece through one-dimensional freedom degree perpendicular to the direction of the surface of the workpiece, which is provided by the relaxation of the spring in the scanning mechanism, so that the uniform force is ensured;
by means of two rotational degrees of freedom and the compression force of the spring, the probe can adapt to the change of the flatness and flatness of the surface of the workpiece, and better coupling is achieved all the time;
3) The five-finger holding type handle is provided, so that a detector can not feel fatigue any more when detecting; the detection efficiency is improved by about 30 percent;
4) The position of the workpiece is not considered, and the position which can be reached by the tool can be detected; the invention solves the accessibility of workpiece edge detection by utilizing the plane position relation of the probe and the three-jaw support leg;
5) According to the invention, the compression force can be changed by changing the springs with different elastic coefficients, so that the detection device is suitable for detecting the surfaces of workpieces with different flatness.
Drawings
FIG. 1 is a schematic diagram of a hand-held tool according to the present invention
FIG. 2 is a partial cross-sectional view of FIG. 1
FIG. 3 is a schematic view of a probe clip
FIG. 4 is a schematic view of a probe holder
FIG. 5 is a schematic view of a first connecting strut
FIG. 6 is a cross-sectional view of FIG. 5
FIG. 7 is a schematic view of a second connecting strut
FIG. 8 is a schematic view of a scanning mechanism
FIG. 9 is a cross-sectional view of the post cartridge of FIG. 8
FIG. 10 is a schematic view of a compression nut
Reference numerals: 1-probe clamping piece, 2-first spring, 3-first lock nut, 4-probe bracket, 5-first connection support rod, 6-second connection support rod, 7-second lock nut, 8-compression nut, 9-scanning mechanism, 901-handle, 902-three-jaw support leg, 903-support rod clamping head, 10-probe, 11-workpiece surface, 12-second spring
Detailed Description
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Referring to fig. 1-10, a hand-held tool for ultrasonic detection of large-plane workpieces; the probe comprises a probe clamping piece 1, a first spring 2, a first locking nut 3, a probe bracket 4, a first connecting support rod 5, a second connecting support rod 6, a second locking nut 7, a compression nut 8, a scanning mechanism 9 and a second spring 12; two probe frame clamping pieces 1 are symmetrically arranged at the opening end of the U-shaped structure at one end of the probe bracket 4, and one end of each probe clamping piece 1 is an arc clamping surface and is used for clamping a probe; the rod body at the other end of the probe clamping piece 1 is respectively positioned in symmetrical mounting holes at the opening end of the U-shaped structure of the probe bracket 4 and is in clearance fit; the limiting blocks on the probe clamping piece rod body are positioned in limiting grooves in the symmetrical mounting holes at the opening end of the U-shaped structure of the probe bracket 4, so that the probe clamping piece 1 can rotate around a shaft, and the maximum rotation amount of the probe clamping piece 1 is limited by the limiting grooves; the probe clamping piece 1 is sleeved with a first spring 2, one end of the first spring is contacted with the end face of the probe clamping end of the probe clamping piece 1, and the other end of the first spring is contacted with the end face of a mounting hole formed in the opening end of the U-shaped structure of the probe bracket 4 and is used for providing clamping force for clamping the probe 10; the threaded end of the rod body of the probe clamping piece 1 is in threaded fit with the first locking nut 3, so that the probe clamping piece 1 cannot fall off from the probe bracket 4; the other end of the probe bracket 4 is a rod-shaped body which can be inserted into a central mounting hole of the first connecting strut 5 for clearance fit; the limiting protrusion on the side wall of the rod-shaped body at the other end of the probe support 4 is positioned in the limiting groove of the central mounting hole of the first connecting rod 5, the probe support 4 can rotate around the central axis of the rod-shaped body of the probe support 4, and the maximum rotation amount of the probe support 4 is limited by the limiting groove; the rod body end of the probe bracket 4 is provided with threads which are connected with the second lock nut 7 in a threaded manner and are used for preventing the probe bracket 4 from falling off from the first connecting support rod 5;
the small end of the second connecting strut 6 passes through a stepped through hole in the center of the strut chuck 903 in the scanning mechanism 9 and then is connected with the first connecting strut 5 through a threaded hole on the side wall of the first connecting strut; the large end face of the second connecting strut 6 can be clamped on the step face in the step hole of the strut clamp 903, a limit groove is formed in the inner wall of the step hole of the strut clamp 903 and is in clearance fit with a limit bump on the large end side wall of the second connecting strut 6, so that the second connecting strut 6 and the strut clamp 903 cannot form a rotational degree of freedom; the second spring 12 is arranged in the central stepped hole of the supporting rod clamping head 903, one end of the second spring is contacted with the end face of the large end of the second connecting supporting rod 6, and the other end of the second spring is contacted with the compression nut 8; one end of the handle 901 is vertically and fixedly connected with the side wall of the supporting rod clamping head 903, and the other end is fixedly connected with the three-jaw supporting leg 902; three prongs of the three prong foot 902 may simultaneously contact the surface of the workpiece to be measured.
Referring to fig. 3: one end of the probe clamping piece 1 is square, and one end face of the square is an arc face and is used for clamping a probe; the other end of the probe clamping piece 1 is a rod-shaped body, the rod-shaped bodies respectively penetrate through symmetrical mounting holes on the probe bracket 4, the rod-shaped bodies are sleeved with first springs 2, and first locking nuts 3 are in threaded fit with the end parts of the rod-shaped bodies of the probe clamping piece 1;
the probe clamping piece 1 is characterized in that one end of the rod-shaped body is a polished rod, a limit lug is machined on the side wall of the polished rod and matched with a limit groove on an installation hole of the U-shaped structure opening end of the probe support 4, so that the probe clamping piece 1 can rotate around the central axis of the probe clamping piece, and the maximum rotation amount of the probe clamping piece is limited by the limit groove. When the surface flatness of the workpiece is poor, the probe 10 can still keep good contact with the surface of the workpiece to be measured due to the fact that the rotational freedom degree exists between the rod body end of the probe clamping piece 1 and the mounting hole of the probe bracket 4.
Referring to fig. 4; one end of the probe support 4 is of a U-shaped structure, and the other end of the probe support is of a multi-stage columnar body; the two ends of the opening end of the U-shaped structure are respectively in a column shape, the axes are coincident, mounting holes are respectively formed along the axes of the columns, and limiting grooves are formed in the mounting holes; the limiting groove is matched with a limiting projection on the rod-shaped body of the probe clamping piece 1;
the large end of the multi-stage column body is fixedly connected with the closed end of the U-shaped structure, a limit boss is arranged on the side wall of the column body in the middle of the multi-stage column body, and the limit boss is matched with a limit groove in the first connecting support rod 5, so that the rotation of the probe support 4 around the axis of the first connecting support rod 5 is limited within a certain angle range; the small end of the multi-stage columnar body is provided with external threads and is connected with a second locking nut 7 to prevent the probe support 4 from falling off from the first connecting support rod 5.
Referring to fig. 5; the first connecting support rod 5 is of a columnar structure, a central hole is formed in the middle of the first connecting support rod along the axis of the first connecting support rod, and the columnar body at the other end of the probe support 4 can pass through the central hole and is in clearance fit; one end face of the first connecting support rod 5 is in contact with the large end face of the columnar body at the other end of the probe support 4, and is in clearance fit; the inner wall of the central hole is also provided with a limit groove which is matched with a limit boss on the columnar body of the probe support 4, so that the rotation of the probe support 4 around the inner hole axis of the first connecting support rod 5 is limited in a certain angle range; the side wall of the first connecting support rod 5 is provided with a threaded hole for installing the second connecting support rod 6; the other end of the first connecting strut 5 is in contact with the second lock nut 7 and is in clearance fit.
Referring to fig. 7; the second connecting support rod 6 is integrally in a second-order column shape, and the small end part is provided with external threads which are connected with screw holes on the side wall of the first connecting rod 5; a limiting boss is processed on the side wall of the large end and is in clearance fit with a groove on the inner wall of the supporting rod clamping head 903; so that the second connecting strut 6 and the strut chuck 903 do not form a rotational degree of freedom, but form a one-dimensional degree of freedom only along the axial direction of the strut chuck 903.
Referring to fig. 8-9; the scanning mechanism 9 comprises a handle 901, three-jaw support legs 902 and a support rod clamping head 903; one end of a handle 901 is vertically and fixedly connected with the side wall of a supporting rod clamping head 903, and the other end of the handle 901 is fixedly connected with a three-jaw support leg 902;
the strut chuck 903 is a cylindrical body, a step through hole is formed in the middle of the strut chuck along the axis, and a limit groove is formed in the inner wall of the large-diameter hole; after the second connecting strut 6 passes through the step through hole, a limit boss on the side wall of the large end of the second connecting strut is in clearance fit with the limit groove and can slide along the limit groove; the second spring 12 is installed in the large diameter hole of the strut chuck 903, the end of the large diameter hole is provided with an internal thread for being in threaded connection with the compression nut 8, one end of the second spring 12 is in contact with the compression nut 8, and the other end of the second spring 12 is in contact with the large end face of the second connecting strut 6.
The handle 901 is of a columnar structure, is convenient for five-finger grasping, and avoids finger joint fatigue caused by long-time operation only by means of finger tip grasping.
The included angles of three support legs of the three-jaw support leg 902 are 120 degrees, and the center positions of the three support legs are vertically and fixedly connected with the handle 901 through support rods; the three support leg ends are spherical contacts and are used for providing contact points for the handheld tool and the workpiece surface 11, so that the handheld tool can slide smoothly on the flat workpiece surface or the uneven workpiece surface, and the three-jaw support leg 902 can provide a unique contact mode on the uneven workpiece surface; the spherical contact is in contact with the workpiece surface 11; the five-finger gripping part on the handle 901 tightly contacts the workpiece surface 11 through three spherical contacts of the three-jaw support leg 902 under the condition of applying pressure, so as to play a role in positioning and stabilizing.
All the above parts are made of aluminum alloy.
When in operation, the probe 10 is placed in the arc-shaped clamping surface of the probe clamping piece 1, and the probe 10 is fastened in the arc-shaped clamping surface by virtue of the acting force of the spring 2 sleeved on the rod body of the probe clamping piece 1; holding the handle 901, placing the three-jaw support leg 902 on the surface 11 of the workpiece to be tested, and applying pressure to enable three spherical contacts of the three-jaw support leg 902 to simultaneously contact the surface 11 of the workpiece to be tested; at this time, the acting force of the workpiece surface 11 on the probe 10 sequentially passes through the probe clamping piece 1, the probe bracket 4, the first connection supporting rod 5, the second connection supporting rod 6 and the second spring 12 installed in the supporting rod clamping head 903, the second spring 12 contracts, and meanwhile, the reaction force of the second spring 12 is sequentially transmitted to the probe 10, so that the probe 10 always has contact force with the workpiece surface; the probe 10 can be placed on the part to be measured on the surface of the workpiece by moving the handle 901 along the surface of the workpiece.
When the flatness of the surface of the workpiece is poor, the probe is not in the plane formed by the three-jaw support legs 902; because rotational degrees of freedom exist between the rod-shaped body end of the probe clamping piece 1 and the mounting hole on the probe support 4 and between the columnar body of the probe support 4 and the first connecting support rod 5, under the diastolic force of the second spring 12 mounted in the support rod clamping head 903, the probe 10 can still keep good contact with the uneven surface to be detected on the workpiece, and the reliability and accuracy of the detection result are ensured.
Claims (10)
1. The handheld tool for ultrasonic detection of the large-plane workpiece is characterized by comprising a probe clamping piece (1), a first spring (2), a probe bracket (4), a first connecting support rod (5), a second connecting support rod (6), a scanning mechanism (9) and a second spring (12);
the scanning mechanism (9) comprises a handle (901), three-jaw support legs (902) and a support rod clamping head (903), wherein one end of the handle (901) is connected with the support rod clamping head (903), and the middle part of the handle (901) is connected with the three-jaw support legs (902); the axis of the supporting rod clamping head (903) is perpendicular to the axis of the handle (9); the inside of the supporting rod clamping head (903) is a cavity, a second spring (12) is coaxially arranged in the cavity, one end of the second spring is fixed through a compression nut, the other end of the second spring is connected with one end of a second connecting supporting rod (6), and the second connecting supporting rod (6) is connected with the outer wall of the first connecting supporting rod (5);
one end of the probe support (4) is of a U-shaped structure, the other end of the probe support is of a rod-shaped structure, the rod-shaped structure penetrates through the inner cavity of the first connecting support rod (5) and then is connected through a lock nut, and the rod-shaped end can rotate around the axis in the first connecting support rod (5); the U-shaped structure is provided with a mounting hole at the opening end port;
the two probe clamping pieces (1) are integrally rod-shaped pieces, a first spring (2) is sleeved on the rod body, one end of the rod body is a probe clamping surface, the other end of the rod body is connected through a locking nut after being provided with a mounting hole through an opening end port of a U-shaped structure, and the end can enable the probe clamping pieces (1) to rotate around the axis of the rod body under the action of matching with the mounting hole; the middle of the two probe clamping surfaces is used for clamping the probe (10).
2. The hand-held tool for ultrasonic detection of large-plane workpieces according to claim 1, wherein the first connecting support rod (5) is axially provided with a through hole, and the inner wall of the through hole is radially provided with a groove; the outer wall of the first connecting strut (5) is radially provided with a threaded hole which is communicated with the through hole.
3. A hand-held fixture for ultrasonic inspection of large planar workpieces as claimed in claim 1 or 2, characterized in that the rod-shaped end port of the probe holder (4) is provided with external threads, the rod wall is axially provided with a protrusion which cooperates with a recess on the first connecting strut (5) so that the rotation of the probe holder (4) about the axis of the inner bore of the first connecting strut (5) is limited.
4. The hand-held tool for ultrasonic detection of large-plane workpieces according to claim 1, wherein the mounting hole formed at the opening end port of the U-shaped structure of the probe support (4) is radially provided with a groove.
5. The hand-held tool for ultrasonic detection of large-plane workpieces according to claim 1 or 4, wherein the probe clamping surface of the probe clamping piece (1) is an arc surface, the arc surface is attached to the outer wall of the probe, the end head at the other end of the rod body is provided with external threads, the side wall is axially provided with a bulge, and the bulge is matched with the groove on the probe support (4) so that the probe clamping piece (1) can rotate along the axis.
6. The hand-held tool for ultrasonic detection of large-plane workpieces according to claim 1, wherein the second connecting support rod (6) is integrally a columnar body, the outer wall is in a second-order shape, the small end part is provided with an external thread, the small end part is connected with a threaded hole on the side wall of the first connecting rod (5) in a matched manner, the large end side wall is provided with a limiting boss, and the limiting boss is in clearance fit with a groove formed on the inner wall of the support rod clamping head (903).
7. The hand-held tool for ultrasonic detection of large-plane workpieces according to claim 1, wherein one end of the first spring (2) is in end face contact with a probe clamping end of the probe clamping piece (1), and the other end of the first spring is in end face contact with an end face of a mounting hole formed in an opening end of the U-shaped structure of the probe support (4) and is used for providing clamping force for clamping the probe.
8. A hand-held tool for ultrasonic inspection of large planar workpieces as claimed in claim 1, wherein the second spring (12) is adapted to provide a contact force for the probe with the workpiece surface (11).
9. The hand-held tool for ultrasonic detection of large planar workpieces according to claim 1, wherein the bottom foot ends of the three-jaw support legs (902) are spherical contacts, so that the hand-held tool can slide smoothly on the surface of the workpiece, and a unique contact mode can be provided on the uneven surface of the workpiece.
10. A hand-held tool for ultrasonic inspection of large planar workpieces as claimed in claims 1 to 9 wherein all parts are made of aluminium alloy.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110732202.5A CN113484422B (en) | 2021-06-30 | 2021-06-30 | Handheld tool for ultrasonic detection of large-plane workpiece |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110732202.5A CN113484422B (en) | 2021-06-30 | 2021-06-30 | Handheld tool for ultrasonic detection of large-plane workpiece |
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| CN113484422A CN113484422A (en) | 2021-10-08 |
| CN113484422B true CN113484422B (en) | 2024-03-29 |
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| KR20100006853A (en) * | 2008-07-10 | 2010-01-22 | 김상순 | A examination unite of ultrasonic transmission |
| CN204881557U (en) * | 2015-07-22 | 2015-12-16 | 珠海格力电器股份有限公司 | Detect frock |
| CN112362737A (en) * | 2020-11-20 | 2021-02-12 | 西安热工研究院有限公司 | Gas turbine compressor impeller blade root groove normal position ultrasonic detection frock |
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2021
- 2021-06-30 CN CN202110732202.5A patent/CN113484422B/en active Active
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|---|---|---|---|---|
| KR20100006853A (en) * | 2008-07-10 | 2010-01-22 | 김상순 | A examination unite of ultrasonic transmission |
| CN204881557U (en) * | 2015-07-22 | 2015-12-16 | 珠海格力电器股份有限公司 | Detect frock |
| CN112362737A (en) * | 2020-11-20 | 2021-02-12 | 西安热工研究院有限公司 | Gas turbine compressor impeller blade root groove normal position ultrasonic detection frock |
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| 大型回转件表面形状自适应扫查在线超声波探伤***;严寒冰;殷国富;;无损检测;20090910(09);全文 * |
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| CN113484422A (en) | 2021-10-08 |
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