CN110658258A - Test probe clamping device, ultrasonic tester and workpiece testing method thereof - Google Patents
Test probe clamping device, ultrasonic tester and workpiece testing method thereof Download PDFInfo
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- CN110658258A CN110658258A CN201911109823.7A CN201911109823A CN110658258A CN 110658258 A CN110658258 A CN 110658258A CN 201911109823 A CN201911109823 A CN 201911109823A CN 110658258 A CN110658258 A CN 110658258A
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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
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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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- 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
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Abstract
The embodiment of the invention discloses a test probe clamping device, an ultrasonic tester and a workpiece testing method thereof, and relates to the technical field of ultrasonic testing. The probe center position can be accurately positioned and the contact pressure is consistent, so that the accuracy and the reliability of a test result can be improved. The method comprises the following steps: the telescopic clamping device comprises a sleeve, a columnar connector, a supporting panel and a telescopic clamping mechanism; the cylindrical connecting body is axially and slidably arranged in the sleeve, the top of the cylindrical connecting body is connected with the supporting panel, at least part of the supporting panel is positioned outside the sleeve, the telescopic clamping mechanism is arranged on the supporting panel, and a laser positioner is arranged at the center of the telescopic clamping mechanism; an elastic piece is further arranged in the sleeve, and the bottom of the columnar connecting body is supported on the elastic piece. The invention is suitable for use in ultrasonic testing applications, such as workpiece inspection.
Description
Technical Field
The invention relates to the technical field of ultrasonic testing, in particular to a test probe clamping device, an ultrasonic tester and a workpiece testing method thereof.
Background
For evaluation of micro defects, porosity and the like in composite materials and ultrasonic nonlinear test experiments such as fatigue tests of metal materials, transmission and reception of ultrasonic waves are generally realized in a one-transmission and one-receiving mode. When the parameters of the used probes are different, for example, the sizes of the probes are different, when the same point is collected for multiple times or different points are tested, the repeatability and the accuracy of test data can be influenced if the central position of the probe deviates, and the accuracy and the reliability of the test data can be ensured only when the central position of the probe is coaxial with the detection point of the workpiece and the contact pressure is consistent.
Disclosure of Invention
In view of this, embodiments of the present invention provide a probe clamping device, an ultrasonic tester, and a method for testing a workpiece by using the probe clamping device, so as to ensure accurate positioning of a center position of a probe and consistent contact pressure, thereby improving accuracy and reliability of a test result.
In order to achieve the above object, an embodiment of the present invention provides a test probe clamping device, including: the telescopic clamping device comprises a sleeve, a columnar connector, a supporting panel and a telescopic clamping mechanism;
the cylindrical connecting body is axially and slidably arranged in the sleeve, the top of the cylindrical connecting body is connected with the supporting panel, at least part of the supporting panel is positioned outside the sleeve, the telescopic clamping mechanism is arranged on the supporting panel, and a laser positioner is arranged at the center of the telescopic clamping mechanism; an elastic piece is further arranged in the sleeve, and the bottom of the columnar connecting body is supported on the elastic piece.
Optionally, the retractable clamping mechanism comprises a rotary positioner and a clamping assembly;
the rotary positioner comprises a rotating shaft, a plurality of push arms are arranged on the circumference of the rotating shaft, the rotating shaft of the rotary positioner penetrates through a central through hole in the support panel, and the laser positioner is arranged at the center of the end part of the rotating shaft of the rotary positioner;
the clamping assembly comprises a plurality of moving strips and a clamping piece connected to the moving strips, the moving strips are radially arranged on the supporting panel, each moving strip is arranged between two adjacent pushing arms, the first ends of the moving strips are located on the same circumference, and the moving strips can slide along the supporting panel;
the first end of the moving strip is arc-shaped, the side face of the pushing arm is tangent to the first end of the moving strip, and the pushing arm pushes the moving strip to move relative to the supporting panel in the rotating process of the rotary positioner.
Optionally, a plurality of pairs of clamping guide blocks are uniformly distributed on the support panel in the circumferential direction, each pair of clamping guide blocks has a guide space, a first threaded hole is formed in the side surface of each clamping guide block, and a first screw for limiting the moving strip penetrates through each first threaded hole;
the moving strip is arranged in the guide space;
the movable strip is provided with a middle groove, the clamping piece is clamped in the middle groove, a limiting plate is arranged at the other end of the movable strip, a second threaded hole is formed in the limiting plate, and a second screw for extruding the clamping piece penetrates through the second threaded hole.
Optionally, a first through slot is formed in the support panel corresponding to the guide space, a third threaded hole is formed in the bottom of the clamping piece, a third screw for limiting the clamping piece penetrates through the third threaded hole, and when the third screw is screwed into the third threaded hole through the first through slot to limit and fix the clamping piece, the inner side of a head of the third screw is pressed against the bottom surface of the support panel.
Optionally, a second cutting groove is formed on the columnar connector at a position corresponding to the first cutting groove.
Optionally, the clamping member has a base portion and a clamping portion above the base portion, the base portion is clamped in the middle groove of the moving bar, and the clamping portion is an arc-shaped panel bending towards a clamping center.
Optionally, the rotating shaft is provided with three pushing arms at intervals of 120 ° in the circumferential direction, and the number of the moving strips is the same as that of the pushing arms.
Optionally, a groove is formed in the top end of the columnar connector, a protrusion is arranged at the bottom of the supporting panel, and the supporting panel is inserted into the groove through the protrusion.
Optionally, the resilient member is a spring.
Optionally, the bottom of the sleeve is further provided with a pressure sensor, the pressure sensor is located below the elastic member, a gasket is arranged between the pressure sensor and the elastic member, and the pressure sensor is electrically connected to a pressure monitoring device.
Optionally, an opening is formed in the side surface of the sleeve and at the position of the pressure sensor, a sliding door is arranged at the opening, and a wiring groove of the pressure sensor is cut at the joint of the sliding door and the sleeve.
Optionally, the laser locator is a punctiform infrared laser locator.
Optionally, a rotating shaft of the rotary positioner penetrates through a central through hole on the supporting panel and is connected with a ratchet mechanism arranged in a central cavity of the columnar connecting body.
In a second aspect, an embodiment of the present invention provides an ultrasonic tester, including a workbench and the test probe clamping device of any one of the first aspect, where the test probe clamping device is installed on the workbench through the sleeve.
In a third aspect, an embodiment of the present invention provides a method for ultrasonically testing a workpiece, implemented based on the ultrasonic tester in the second aspect, including: opening the laser positioner, and adjusting the working platform to enable the laser point to be aligned and reach the central position of a point to be detected of the workpiece;
adjusting the clamping space of a telescopic clamping mechanism on the supporting panel, and when the laser point at the center of the clamping space of the telescopic clamping mechanism is adjusted to be coaxial with the point to be detected of the workpiece, placing and fixing the test probe in the clamping space of the telescopic clamping mechanism;
starting an ultrasonic tester to perform flaw detection testing, and utilizing an elastic piece below the columnar connector to balance the pressure of a probe in contact with a workpiece detection point in real time in the testing process so as to ensure the consistency of the contact pressure in the testing process;
collecting test data of a point to be detected of a workpiece;
and repeating the steps until the test of all the points to be detected of the workpiece is finished.
The test probe clamping device, the ultrasonic tester and the method for testing the workpiece provided by the embodiment of the invention comprise the following steps: the telescopic clamping device comprises a sleeve, a columnar connector, a supporting panel and a telescopic clamping mechanism; the cylindrical connecting body is axially and slidably arranged in the sleeve, the top of the cylindrical connecting body is connected with the supporting panel, at least part of the supporting panel is positioned outside the sleeve, the telescopic clamping mechanism is arranged on the supporting panel, and a laser positioner is arranged at the center of the telescopic clamping mechanism; an elastic piece is further arranged in the sleeve, and the bottom of the columnar connecting body is supported on the elastic piece. When a test probe is installed before testing, the device is fixed on a working platform of a detection or test instrument, equipment and the like, a laser positioner is opened, a laser point is aligned to reach the central position of a point to be detected of a workpiece, the installation center of the test probe is positioned based on the currently determined laser point position of the laser positioner, the clamping space of a telescopic clamping mechanism is adjusted to adapt to the profile size of the probe based on the positioning center to clamp the probe, and the accurate positioning of the central position of the probe is ensured; the elastic piece is arranged in the sleeve and positioned below the columnar connecting body, so that the contact pressure of the probe and a workpiece detection point in the test process is balanced, and the consistency of the contact pressure of the probe and the detection point can be ensured; based on the above technical effect based on the structure and principle combined analysis, the technical scheme provided by this embodiment can ensure accurate positioning of the center position of the probe and consistent contact pressure, thereby improving the accuracy and reliability of the test result.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a test probe clamping device according to an embodiment of the present invention;
FIG. 2 is a front view of the structure of one embodiment of the test probe holder of the present invention;
FIG. 3 is a right side view of FIG. 2;
FIG. 4 is a top view of FIG. 2;
FIG. 5 is a schematic structural diagram of one embodiment of the columnar connector shown in FIGS. 1-4;
FIG. 6 is a schematic structural diagram of one embodiment of the support panel shown in FIGS. 1 to 4;
fig. 7 is a schematic structural diagram of an embodiment of the moving bar in fig. 1 to 4.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
It should be apparent that numerous technical details are set forth in the following specific examples in order to provide a more thorough description of the present invention, and it should be apparent to one skilled in the art that the present invention may be practiced without some of these details. In addition, some methods, means, components and applications thereof known to those skilled in the art are not described in detail in order to highlight the gist of the present invention, but the implementation of the present invention is not affected. The embodiments described herein are only a few embodiments of the present invention, and not all embodiments. 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.
In order to facilitate the public to understand the technical scheme of the embodiment of the invention, the current state of the probe positioning technology and the existing problems are briefly introduced:
the traditional method solves the problem of aligning the center of the probe by completely using a manual positioning method on a workpiece to be detected, but completely uses the error caused by manual operation in manual positioning to further influence the positioning accuracy of the center of the probe; in addition, before the test, the wafer or the probe is fixed at the detection point by the adhesive force of the coupling agent to ensure the adhesion force, but the fixing by the adhesive force of the coupling agent has the defects that the adhesive force can be changed along with the vibration of the wafer of the probe and can also be changed along with the time lapse, so that the consistency of the contact pressure between the probe and the surface of the detection point of the workpiece can not be ensured; thereby affecting the accuracy and reliability of the test result.
Example one
The test probe clamping device provided by the embodiment of the invention is convenient for clamping and positioning the probe, and is suitable for ultrasonic test application occasions, such as workpiece detection. When testing, based on this embodiment clamping device carries out the clamping location to the test probe, can improve the accuracy and the reliability of test result.
Referring to fig. 1 to 7, a test probe clamping device according to an embodiment of the present invention includes: the device comprises a sleeve 1, a columnar connector 2, a supporting panel 3 and a telescopic clamping mechanism 4; the columnar connecting body 2 is axially and slidably arranged in the sleeve 1, the top of the columnar connecting body 2 is connected with the supporting panel 3, at least part of the supporting panel 3 is positioned outside the sleeve 1, the telescopic clamping mechanism 4 is arranged on the supporting panel 3, and the center of the telescopic clamping mechanism 4 is provided with the laser locator 5; an elastic part 6 is further arranged in the sleeve 1, and the bottom of the columnar connecting body 2 is supported on the elastic part 6.
The sleeve 1 is used for mounting the clamping device on the test workbench, and the contour of the sleeve 1 can be adaptively set according to the clamping structure of the test workbench, for example, the clamping structure of the workbench is an annular clamping part, and the sleeve 1 can be made into a sleeve 1 with a cylindrical outer contour. The profile of the columnar connection body 2 is adapted according to the structure of the inner space of the sleeve 1, for example, the cylindrical structure is formed inside the sleeve 1, and the columnar connection body 2 may be formed as a cylindrical connection body.
Specifically, the side surface of the columnar connector 2 is provided with a sliding chute penetrating through the upper surface and the lower surface, the inner wall of the sleeve 1 is provided with a protruding strip penetrating through the upper surface and the lower surface, and when the columnar connector 2 is installed in the sleeve 1, the sliding chute is matched with the protruding strip, so that the columnar connector 2 can be ensured to slide smoothly along the axial direction when needed; for example, in the testing process, the workbench vibrates, and at this time, the elastic body arranged below the columnar connecting body 2 and the columnar connecting body 2 are in up-and-down sliding fit to play a role in damping, so that the consistency of the contact pressure of the probe and the workpiece detection point in the testing process is ensured. The elastic member 6 may be a spring, such as a compression spring.
Referring to fig. 5 and 6, in some embodiments, a plurality of grooves 21 are further formed on the top of the columnar connecting body 2, a plurality of protrusions 31 are formed on the bottom of the supporting panel 3 corresponding to the grooves 21, and the supporting panel 3 is inserted into the grooves 21 through the protrusions 31 to connect with the columnar connecting body 2.
When a test probe is installed before testing, the device is fixed on a working platform of a detection or test instrument, equipment and the like, a laser positioner 5 is opened, a laser spot is aligned to reach the central position of a point to be detected of the workpiece, the mounting center of the test probe is positioned based on the currently determined laser spot position of the laser positioner 5, and the clamping space of a telescopic clamping mechanism 4 is adjusted to adapt to the profile size of the probe based on the positioning center to clamp the probe, so that the positioning accuracy of the central position of the probe is ensured; the elastic part 6 which is arranged in the sleeve 1 and is positioned below the columnar connecting body 2 balances the contact pressure of the probe and a workpiece detection point in the test process, and can ensure the consistency of the contact pressure of the probe and the detection point; based on the above technical effect based on the structure and principle combined analysis, the technical scheme provided by this embodiment can ensure accurate positioning of the center position of the probe and consistent contact pressure, thereby improving the accuracy and reliability of the test result.
The laser locator 5 may be a point-like infrared laser locator, a linear infrared laser locator, or the like.
The telescopic clamping mechanism 4 is used for clamping the test probe, and can be suitable for positioning and clamping probes with different sizes and specifications due to the adoption of the clamping mechanism with the telescopic structure.
Referring to fig. 1-4, in an alternative embodiment, the retractable clamping mechanism 4 includes a rotary pusher 41 and a clamping assembly.
The rotary positioner 41 includes a rotating shaft (shown in the figure as a laser positioner), a plurality of pushing arms 411 are disposed on the circumference of the rotating shaft, the rotating shaft of the rotary positioner penetrates through the central through hole 32 of the supporting panel 3, and in a specific embodiment, the rotating shaft of the rotary positioner penetrates through the central through hole 32 of the supporting panel 3 and is connected to a ratchet mechanism (not shown) disposed in the central cavity 22 of the columnar connecting body 2. The ratchet mechanism is a one-way ratchet mechanism and has the functions of one-way rotation and reverse locking. When the clamping assembly needs to be reset to an initial clamping state, the rotary pusher can be pulled outwards, so that the lower end of the rotating shaft of the rotary pusher is separated from the ratchet wheel, the ratchet wheel and the rotary pusher are in a bidirectional movable state, and when the clamping assembly is reset to the initial position, the rotary pusher is pushed into a position where the lower end of the rotating shaft is meshed with the ratchet wheel. Specifically, the ratchet mechanism realizes the functions of unidirectional rotation and reverse locking, and is set in the prior art, which is not described again, and the contents of the chapter about the teaching of the ratchet mechanism in the mechanical design can be referred to.
It will be appreciated that the rotary pusher has room axially for it to be pulled outwardly or pushed inwardly to engage and disengage the ratchet. Thereby realizing the reset of the clamping component.
The laser positioner 5 is arranged at the center of the end part of the rotating shaft of the rotary positioner.
Referring to fig. 1 and 7, the clamping assembly includes a plurality of moving bars 7 and a clamping member 8 connected to the moving bars 7, the moving bars 7 are radially disposed on the supporting panel 3, each moving bar 7 is disposed between two adjacent pushing arms 411, first ends of the moving bars 7 are located on the same circumference, and the moving bars 7 can slide along the supporting panel 3; the first end of the moving strip 7 is arc-shaped, the side surface of the push arm 411 is tangent to the first end of the moving strip 7, and in the rotating process of the rotary positioner, the push arm 411 pushes the moving strip 7 to move relative to the support panel 3. In this way the gripping members 8, which can be connected to the moving bar 7, are also moved with respect to the support panel 3, with a corresponding variation of the gripping space, so that probes of different sizes can be gripped.
Referring to fig. 1, 3 and 6, in some embodiments, a plurality of pairs of positioning guide blocks 9 are uniformly distributed on the support panel 3 in the circumferential direction, each pair of positioning guide blocks 9 has a guide space, a first threaded hole 91 is formed in the side surface of each positioning guide block 9, and a first screw 92 for limiting the movable bar 7 is inserted into the first threaded hole 91; the moving strip 7 is arranged in the guide space; the movable strip 7 is provided with a middle groove 71, the clamping piece 8 is clamped in the middle groove 71, a limiting plate 72 is arranged at the other end of the movable strip 7, a second threaded hole 73 is formed in the limiting plate 72, and a second screw 74 used for extruding the clamping piece 8 penetrates through the second threaded hole 73.
After the probe installation position is determined through the laser positioner 5, the telescopic clamping mechanism 4 rotationally pushes the movable strip 7 to move along the supporting panel 3 through the rotary pusher, when the clamping space of the clamping piece 8 is adjusted to a proper size, the center of the test probe is aligned to the center of the rotary pusher and then is placed into the clamping space formed by the clamping piece 8, the clamping action of the movable strip 7 on the clamping piece 8 limits the degree of freedom of the clamping piece 8 in the lateral direction, and the second screw 74 on the back of the clamping piece 8 tightly pushes the clamping piece 8, so that the clamping piece 8 is cooperatively fixed, and the fixed installation of the test probe in the clamping space is completed.
In other embodiments, a first through slot 33 is provided on the support panel 3 corresponding to the guiding space, a third threaded hole is provided at the bottom of the clamping member 8, a third screw 81 is provided in the third threaded hole for limiting the position of the clamping member 8, and when the clamping member 8 is limited and fixed by screwing the third screw 81 into the third threaded hole through the first through slot 33, the inner side of the head of the third screw is pressed against the bottom surface of the support panel 3. The arrangement of the first cutting groove can facilitate the installation of the third screw.
Through the concrete setting of third screw, restriction holder 8 is at the ascending degree of freedom of vertical direction to because the inboard pressure of third screw head is on supporting panel 3 bottom surface, can also play about transversely fixed to the holder, thereby can further increase the fastness of test probe in the centre gripping space.
Referring to fig. 1 to 4, 5 and 6, in an alternative embodiment, the columnar connector 2 is provided with a second slot 23 at a position corresponding to the first slot 33, and the second slot 23 can facilitate the installation of a third screw 81 from below and can accommodate a third screw head, so as to prevent the exposed screw head from affecting the tight contact connection between the support panel 3 and the upper end of the columnar connector 2. Optionally, the second cutting groove 23 is a rectangular cutting groove formed by cutting along the edge of the side portion of the columnar connector 2, the depth of the second cutting groove 23 at least corresponds to the length of the threaded section of the third screw 81, and the groove width is greater than the maximum width of the end of the third screw 81, preferably, the groove width is greater than the maximum width of the end of the third screw 81 by 4-8 mm.
Specifically, referring to fig. 1 and 4, the clamping member 8 has a base 82 that is engaged in the middle groove of the moving bar 7 to limit the lateral freedom of the clamping member 8, and a clamping portion 83 above the base 82 that is an arc-shaped panel bent toward the clamping center to clamp the probe.
More specifically, the base of the clamping member 8 is of a structure with a wide upper part and a narrow lower part, wherein the narrow part of the base is clamped in the middle groove of the movable strip 7, and the wide part of the base is positioned on the upper end surface of the movable strip 7 to play a limiting role, so that the clamping member 8 is prevented from moving downwards due to vibration, and the clamping firmness is further enhanced.
In some alternative embodiments, three push arms 411 are arranged on the rotating shaft at intervals of 120 ° in the circumferential direction, and the number of the moving bars 7 is the same as that of the push arms 411. The clamping guide blocks 9 are circumferentially arranged on the support panel 3 in three pairs, and each pair of clamping guide blocks 9 is spaced by 120 degrees.
Referring to fig. 1 to 3, in some alternative embodiments, the bottom of the sleeve 1 is further provided with a pressure sensor 10 for acquiring the contact pressure between the probe and the workpiece detection point, wherein the pressure sensor is preferably a spoke type pressure sensor; the pressure sensor 10 is located below the elastic part 6, a gasket 50 is arranged between the pressure sensor and the elastic part 6, the pressure sensor is electrically connected to a pressure monitoring device (not shown in the figure), and the pressure sensor sends acquired contact pressure between the probe and a workpiece detection point to the pressure monitoring device so as to realize real-time monitoring of the contact pressure between the probe and the workpiece detection point and facilitate screening of invalid test data.
With continued reference to fig. 1 to 3, in an alternative embodiment, an opening is opened at the pressure sensor on the side of the sleeve 1, a sliding door 60 is provided at the opening, and a wiring groove 70 of the pressure sensor is cut at the joint of the sliding door and the sleeve 1 for passing through a connection cable of the pressure sensor and the pressure monitoring device.
For a more clear description of the present invention, an installation process and a process of clamping a probe of a test probe clamping device according to an embodiment of the present invention are described as follows:
the installation process comprises the following steps: the sliding door on the side surface of the sleeve 1 is pulled open, the pressure sensor and the gasket (5) are sequentially placed, the spring is placed from the opening at the upper end of the sleeve 1, and the spring is tightly pressed on the gasket and used for balancing the change of contact pressure when the probe is vibrated so as to ensure the consistency of the contact pressure of the probe and a point to be detected of a workpiece;
connecting the columnar connector 2 with the support panel 3, and installing the bearing and the rotary positioner into a central through hole of the support panel 3;
the device is fixed on a workbench of a detection platform or other mechanisms for detection through a sleeve 1, a laser positioner 5 is started, the position of a laser spot is observed, and the platform is adjusted to enable the laser spot to reach the position of a point to be detected of a workpiece;
locking and fixing the current installation position of the device, taking down the supporting panel 3, twisting the rotary pusher to enable the moving strip 7 to move radially relative to the clamping guide block 9, and further adjusting the adjustable range of the moving strip 7;
screwing the first screw on the side of the block 9 to fix the position of the moving bar 7, placing the probe at the center of the support panel 3, screwing the third screw 81 to partially screw the third screw 81 into the third screw hole at the bottom of the clamping member to perform initial positioning, screwing the second screw 74 to partially screw the second screw 74 into the second screw hole 73 in the position limiting bar, wherein the end of the second screw 74 abuts against the back of the clamping member 8 (the other side opposite to the clamping side), the tightening force of the third screw 81 and the second screw 74 is not enough to completely fix the clamping member, then sequentially screwing the third screw 81 and the second screw 74 to limit the degree of freedom of the clamping member 8, and the third screw 81 to make the second screw and the third screw 81 extend into the same distance, thereby ensuring that the probe is clamped by the clamping member 8 at the center of the support panel 3, and screwing the second screw 81 and the third screw 81, the freedom degree of the clamping piece 8 is limited, so that the probe is clamped at the center of the supporting panel 3, the positioning, clamping and installation of the probe are realized, and the coaxial alignment of the central position of the probe and the point to be detected of the workpiece is ensured. In a preferred embodiment, the third threaded hole and the second threaded hole are designed to allow the second screw and the third screw to be screwed into the same effective thread pitch, so that the clamping member is just fixed tightly, and the stress of the clamping member in all directions can be balanced.
After the probe is positioned and installed, the test equipment is started to test the workpiece, so that the test data obtained on the basis of following the principle of single variable can correspondingly improve the accuracy of evaluation and judgment when the test data is used for evaluating and judging the corresponding information of the sample.
The invention further provides an ultrasonic tester which comprises a workbench and the test probe clamping device in any one of the embodiments, wherein the test probe clamping device is arranged on the workbench through the sleeve 1. By adopting the test probe clamping device of the embodiment, the positioning accuracy of the center position of the probe and the consistency of the contact pressure can be ensured, so that the accuracy and the reliability of the test result can be improved.
On the basis of the foregoing embodiments, a further embodiment of the present invention provides a method for ultrasonically testing a workpiece, which is implemented based on the ultrasonic tester described in the foregoing embodiments, and includes:
opening the laser positioner 5, and adjusting the working platform to enable the laser point to be aligned and reach the central position of a point to be detected of the workpiece;
adjusting the clamping space of a telescopic clamping mechanism 4 on the supporting panel 3, and when the laser point at the center of the clamping space of the telescopic clamping mechanism 4 is adjusted to be coaxial with the point to be detected of the workpiece, placing and fixing the test probe in the clamping space of the telescopic clamping mechanism 4;
starting an ultrasonic tester to perform flaw detection testing, and utilizing an elastic piece 6 below the columnar connector 2 to balance the pressure of a probe contacting a workpiece detection point in real time in the testing process so as to ensure the consistency of the contact pressure in the testing process;
collecting test data of a first point to be detected of a workpiece;
and repeating the steps until the test of all the points to be detected of the workpiece is finished.
According to the workpiece testing method provided by the embodiment, in the testing process, the accurate positioning of the center position of the probe and the consistent contact pressure are ensured, so that the accuracy and the reliability of the testing result can be improved.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The terms "upper", "lower", and the like, indicate orientations or positional relationships and are used for convenience in describing the present invention and for simplicity in description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A test probe holding apparatus, comprising: the telescopic clamping device comprises a sleeve, a columnar connector, a supporting panel and a telescopic clamping mechanism;
the cylindrical connecting body is axially and slidably arranged in the sleeve, the top of the cylindrical connecting body is connected with the supporting panel, at least part of the supporting panel is positioned outside the sleeve, the telescopic clamping mechanism is arranged on the supporting panel, and a laser positioner is arranged at the center of the telescopic clamping mechanism; an elastic piece is further arranged in the sleeve, and the bottom of the columnar connecting body is supported on the elastic piece.
2. The test probe gripping apparatus of claim 1, wherein the retractable gripping mechanism comprises a rotary positioner and a gripping assembly;
the rotary positioner comprises a rotating shaft, a plurality of push arms are arranged on the circumference of the rotating shaft, the rotating shaft of the rotary positioner penetrates through a central through hole in the support panel, and the laser positioner is arranged at the center of the end part of the rotating shaft of the rotary positioner;
the clamping assembly comprises a plurality of moving strips and a clamping piece connected to the moving strips, the moving strips are radially arranged on the supporting panel, each moving strip is arranged between two adjacent pushing arms, the first ends of the moving strips are located on the same circumference, and the moving strips can slide along the supporting panel;
the first end of the moving strip is arc-shaped, the side face of the pushing arm is tangent to the first end of the moving strip, and the pushing arm pushes the moving strip to move relative to the supporting panel in the rotating process of the rotary positioner.
3. The test probe clamping device of claim 2, wherein a plurality of pairs of clamping guide blocks are uniformly distributed on the supporting panel in the circumferential direction, each pair of clamping guide blocks has a guide space, a first threaded hole is formed in the side surface of each clamping guide block, and a first screw for limiting the moving strip penetrates through the first threaded hole;
the moving strip is arranged in the guide space;
the movable strip is provided with a middle groove, the clamping piece is clamped in the middle groove, a limiting plate is arranged at the other end of the movable strip, a second threaded hole is formed in the limiting plate, and a second screw for extruding the clamping piece penetrates through the second threaded hole.
4. The test probe clamping device according to claim 3, wherein a first through slot is formed in the support panel corresponding to the guide space, a third threaded hole is formed in the bottom of the clamping member, a third screw for limiting the clamping member is inserted into the third threaded hole, and when the third screw is screwed into the third threaded hole through the first through slot to limit the clamping member, the inner side of the head of the third screw is pressed against the bottom surface of the support panel.
5. The test probe gripping apparatus of claim 4, wherein the columnar connecting body is provided with a second slot at a position corresponding to the first slot.
6. The test probe gripping device of any one of claims 3 to 5, wherein the gripping member has a base portion and a gripping portion above the base portion, the base portion being engaged in the intermediate groove of the moving bar, the gripping portion being an arcuate panel curved toward a gripping center.
7. The test probe holding apparatus of claim 2, wherein three push arms are provided at intervals of 120 ° in the circumferential direction of the rotation shaft, and the number of the moving bars is the same as the number of the push arms.
8. The test probe holder of claim 1, wherein the top end of the columnar connector has a recess, and the bottom of the support panel has a protrusion, and the support panel is inserted into the recess through the protrusion.
9. The test probe gripping apparatus of claim 1, wherein the resilient member is a spring.
10. The test probe holding device of claim 1, 8 or 9, wherein the bottom of the sleeve is further provided with a pressure sensor, the pressure sensor is located below the elastic member, a gasket is arranged between the pressure sensor and the elastic member, and the pressure sensor is electrically connected to a pressure monitoring device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911109823.7A CN110658258A (en) | 2019-11-13 | 2019-11-13 | Test probe clamping device, ultrasonic tester and workpiece testing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911109823.7A CN110658258A (en) | 2019-11-13 | 2019-11-13 | Test probe clamping device, ultrasonic tester and workpiece testing method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN110658258A true CN110658258A (en) | 2020-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911109823.7A Pending CN110658258A (en) | 2019-11-13 | 2019-11-13 | Test probe clamping device, ultrasonic tester and workpiece testing method thereof |
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| CN (1) | CN110658258A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112345835A (en) * | 2020-11-03 | 2021-02-09 | 昆山联滔电子有限公司 | Detection device and detection positioning method |
| CN113983289A (en) * | 2021-10-21 | 2022-01-28 | 武汉理工大学 | Marine organism prevents off clamping device of formula ultrasonic transducer of preventing and removes for butterfly valve |
-
2019
- 2019-11-13 CN CN201911109823.7A patent/CN110658258A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112345835A (en) * | 2020-11-03 | 2021-02-09 | 昆山联滔电子有限公司 | Detection device and detection positioning method |
| CN113983289A (en) * | 2021-10-21 | 2022-01-28 | 武汉理工大学 | Marine organism prevents off clamping device of formula ultrasonic transducer of preventing and removes for butterfly valve |
| CN113983289B (en) * | 2021-10-21 | 2022-11-15 | 武汉理工大学 | Marine organism prevents off clamping device of formula ultrasonic transducer of preventing and removes for butterfly valve |
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