CN216898729U - Flushness detects instrument - Google Patents

Abstract

The utility model belongs to the technical field of aircraft assembly, and particularly discloses a levelness detection tool which comprises a shell, a first probe, a second probe and a capacitive grating measurement system, wherein the first probe and the second probe penetrate through the shell and are respectively abutted against a first workpiece and a second workpiece, the capacitive grating measurement system can be used for acquiring the relative displacement of the first probe and the second probe, converting the relative displacement into the phase variation of an electric signal, and processing the phase variation to obtain levelness result data. According to the utility model, through the arrangement of the capacitive grating measuring system, the mechanical displacement between the first probe and the second probe can be converted into the corresponding electrical signal variation, the measuring processes of visual observation and manual reading are omitted, the inspection accuracy is high, and the measuring efficiency is high.

Description

Flushness detects instrument

Technical Field

The utility model relates to the technical field of aircraft assembly, in particular to a flushness detection tool.

Background

In the aerospace field, a large number of fasteners are generally required for fixing the connection between the skin of the aircraft and the frame, however, in the fastening process of the fasteners, because the direction and the size of the force cannot be accurately controlled, the heads of the fasteners are not flush with the surface of the skin of the aircraft, the flush degree is generally adopted to represent the distance from the heads of the various fasteners to the surface of the skin, and in order to ensure the stability and the flying speed of the aircraft in the flying process, the flush degree needs to be kept within a certain range.

In order to check the reliability of aircraft assembly, the flushness of the surface of the skin needs to be measured after the fastener and the skin are assembled, so as to determine whether the skin butt joint area meets the flushness requirement, and then continue to assemble subsequent products. Among the prior art, the levelness of covering surface is measured and is adopted manual ruler to add the feeler gauge usually, need use the ruler to press in the protruding side of fastener during the measurement, then measure the clearance between covering and the ruler with the feeler gauge, because two covering that form the levelness have a very long section, need repeat the measurement, measuring time and process are longer, and utilize the mode of naked eye observation and artifical reading to carry out the inspection of levelness, and the accuracy of inspection is lower.

Therefore, a need exists for a flushness detection tool to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a flatness detection tool, which can avoid the processes of visual observation and manual reading and realize the accurate measurement of the skin flatness.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the present invention provides a flushness detection tool for detecting flushness between a first workpiece and a second workpiece, the flushness detection tool comprising:

the shell comprises a base and a top cover, and the top cover is buckled on the base;

the first probe penetrates through the base and the top cover and can slide in the mounting space, and one end of the first probe is abutted to the first workpiece;

the second probe penetrates through the base and the top cover and can slide in the mounting space, and one end of the second probe is abutted to the second workpiece; and

and the capacitive grating measuring system is arranged in the shell and is used for acquiring the relative displacement of the first probe and the second probe, converting the relative displacement into the phase variation of an electric signal, and processing data to obtain the result data of the flatness.

Optionally, the flatness detection tool is provided with a plurality of the first probes and a plurality of the second probes, the number of the first probes is the same as that of the second probes, each of the second probes is arranged corresponding to one of the first probes, and the first probes and the second probes are uniformly distributed along the circumferential direction of the base.

Optionally, the flatness detection tool is provided with a plurality of capacitive grating measurement systems, the number of which is the same as that of the first probes, and each capacitive grating measurement system is arranged corresponding to one first probe.

Optionally, a mounting plate is disposed within the housing, and the capacitive grating measurement system is disposed between the top cover and the mounting plate.

Optionally, the first probe comprises a first ejector rod, a first limiting block and a first reset piece, the first limiting block is fixed on the first ejector rod, the first reset piece is sleeved on the first ejector rod, two ends of the first reset piece are respectively abutted to the mounting plate and the first limiting block, and the first reset piece can press the first limiting block on the base.

Optionally, the second probe comprises a second ejector rod, a second limiting block and a second resetting piece, the second limiting block is fixed to the second ejector rod, the second resetting piece is sleeved on the second ejector rod, two ends of the second resetting piece are respectively abutted to the mounting plate and the second limiting block, and the second resetting piece can tightly press the second limiting block to the base.

Optionally, the capacitive grid measuring system includes a movable grid, a fixed grid and a capacitive grid sensor, the movable grid is fixed to the first probe, the fixed grid is fixed to the second probe, and the capacitive grid sensor is used for acquiring the relative displacement between the movable grid and the fixed grid.

Optionally, the density of the grids arranged on the movable grid is greater than the density of the grids arranged on the fixed grid.

Optionally, the capacitive grating measurement system includes a data processing module, the data processing module is electrically connected to the capacitive grating sensor, the capacitive grating sensor transmits the relative displacement to the data processing module, the data processing module converts the relative displacement into a phase variation of an electrical signal, and the resulting data of the flatness is obtained after data processing.

Optionally, the capacitive grating measurement system further includes a display, the display is disposed on the top cover, the display is electrically connected to the data processing module, and the display is configured to display the resulting data of the flatness.

The utility model has the beneficial effects that:

the utility model provides a levelness detection tool which comprises a shell, a first probe, a second probe and a capacitive grating measurement system, wherein the first probe and the second probe penetrate through the shell and are respectively abutted against a first workpiece and a second workpiece, the capacitive grating measurement system can be used for acquiring the relative displacement of the first probe and the second probe, converting the relative displacement into the phase variation of an electric signal, and processing the data to obtain the levelness result data. Through capacitive gate measurement system's setting, can change the mechanical displacement volume between first probe and the second probe into corresponding signal of telecommunication variable quantity, saved the measurement process of visual observation and artifical reading, the accuracy of inspection is high, and measurement of efficiency is high.

Drawings

FIG. 1 is a schematic structural diagram of a non-operational flushness detection tool provided in an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a base provided in an embodiment of the present invention;

FIG. 3 is a schematic structural view of a top cover provided in an embodiment of the present invention;

FIG. 4 is a cross-sectional view of section A-A of FIG. 1;

FIG. 5 is an enlarged view of a portion of FIG. 4 at A;

FIG. 6 is a schematic diagram of a flush detection tool in a first operating state according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a flush detection tool in a second working state according to an embodiment of the present invention.

In the figure:

100. a first workpiece; 200. a second workpiece; 300. a housing; 310. a base; 311. a base plate; 312. a support plate; 313. a first through hole; 314. a second through hole; 320. a top cover; 321. a barrel; 322. a flange; 323. a third through hole; 324. a fourth via hole; 400. a first probe; 410. a first ejector rod; 420. a first stopper; 430. a first reset member; 500. a second probe; 510. a second ejector rod; 520. a second limiting block; 530. a second reset member; 610. moving the grid; 620. fixing a grid; 630. a display; 700. and (7) mounting the plate.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not to be construed as limiting the utility model. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

As shown in fig. 1, the present embodiment provides a flushness detection tool for detecting flushness between a first workpiece 100 and a second workpiece 200, wherein the first workpiece 100 is taken as a fastener and the second workpiece 200 is taken as a skin for illustration. In other embodiments, the flushness detection tool in the present embodiment may also detect flushness between other workpieces, which is not limited in this embodiment.

The flushness detection tool comprises a shell 300, a first probe 400, a second probe 500 and a capacitive grating measurement system, wherein the shell 300 comprises a base 310 and a top cover 320, the top cover 320 is buckled on the base 310, the first probe 400 and the second probe 500 are arranged through the base 310 and the top cover 320, one end of the first probe 400 is abutted with the surface of a first workpiece 100, one end of the second probe 500 is abutted with the surface of a second workpiece 200, both the first probe 400 and the second probe 500 can slide in the shell 300, the first probe 400 and the second probe 500 move in different distances in the shell 300 due to the height difference between the surface of the first workpiece 100 and the surface of the second workpiece 200, so that the first probe 400 and the second probe 500 have relative displacement, the capacitive grating measurement system is arranged in the shell 300, and the capacitive grating measurement system can acquire the relative displacement between the first probe 400 and the second probe 500, and the relative displacement is converted into the phase variation of the electric signal, and the result data of the levelness between the first workpiece 100 and the second workpiece 200 can be obtained after data processing, so that the measuring process of visual observation and manual reading is omitted in the measuring process, the detection accuracy is higher, the detection method is simple, the repeated measurement for multiple times by an operator is facilitated, the measurement error rate is reduced, and the detection efficiency is higher.

Referring to fig. 2, the base 310 in this embodiment includes a bottom plate 311 and a support plate 312, the bottom plate 311 is configured as a circular plate, the support plate 312 is a cylinder with two open ends, the cylinder is coaxially disposed with the circular plate, and the support plate 312 is configured as a cylinder with two open ends, so as to avoid the first probe 400 and the second probe 500, so that the first probe 400 and the second probe 500 can contact with the first workpiece 100 and the second workpiece 200. Alternatively, in some embodiments, bottom plate 311 and support plate 312 may be connected by welding. In other embodiments, the bottom plate 311 and the supporting plate 312 may be integrally molded. Of course, in other embodiments, the bottom plate 311 and the supporting plate 312 may be connected in other connection manners.

Referring to fig. 3, the top cap 320 in this embodiment includes a barrel 321, one end of the barrel 321 is provided with an opening, the other end is provided with a sealing plate, one end of the barrel 321 provided with the opening extends outward to form a flange 322, one end of the top cap 320 provided with the flange 322 is fastened on the bottom plate 311 of the base 310, and an edge of the flange 322 coincides with an edge of the bottom plate 311.

Further, a first through hole 313 and a second through hole 314 are arranged on the bottom plate 311 of the base 310, a third through hole 323 and a fourth through hole 324 are arranged on the blocking plate of the top cover 320, wherein the first through hole 313 and the third through hole 323 are correspondingly arranged, the first probe 400 is arranged by passing through the first through hole 313 and the third through hole 323, the first probe 400 can slide along the first through hole 313 and the third through hole 323, the second through hole 314 and the fourth through hole 324 are correspondingly arranged, the second probe 500 is arranged by passing through the second through hole 314 and the fourth through hole 324, and the second probe 500 can slide along the second through hole 314 and the fourth through hole 324.

In order to further improve the accuracy of the flushness measurement, the flushness detection tool in the embodiment is provided with a plurality of first probes 400 and a plurality of second probes 500, the number of the first probes 400 is the same as that of the second probes 500, each second probe 500 is arranged corresponding to one first probe 400, the first probes 400 and the second probes 500 are uniformly distributed along the circumference of the base 310, and correspondingly, the first through holes 313, the second through holes 314, the third through holes 323 and the fourth through holes 324 are also provided with corresponding numbers. Illustratively, in this embodiment, four sets of the first probe 400 and the second probe 500 are taken as an example, the four sets of the first probe 400 and the second probe 500 are arranged in a cross shape, the four first probes 400 are located on the same circumference, the diameter of the circumference is smaller than that of the head of the fastener, the diameter of the circumference is larger than that of the head of the fastener, so as to ensure that the first probes 400 can abut against the head of the fastener, the second probes 500 can abut against the surface of the skin, and therefore, the first probes 400 and the second probes 500 form a relative displacement therebetween.

Optionally, each set of the first probe 400 and the second probe 500 is provided with the same number of capacitive grating measurement systems, and each capacitive grating measurement system is provided with one set of the first probe 400 and the second probe 500. Through four groups of first probes 400, second probes 500 and a capacitive grating measuring system, four groups of different levelness detection results obtained in the circumferential direction of the fastener can be obtained, a levelness range can be obtained by judging the maximum value and the minimum value of the results of the four levelness, whether the assembly of subsequent products is continued or not is judged by judging whether the levelness range is in the range required by the levelness, and the precision of product manufacturing is ensured.

Referring to fig. 4, in the housing 300 of the embodiment, a mounting plate 700 is disposed, the capacitive grating measurement system is disposed between the top cover 320 and the mounting plate 700, and position limiting holes are disposed on the mounting plate 700 at positions corresponding to the first probe 400 and the second probe 500, on one hand, the position limiting holes can avoid the first probe 400 and the second probe 500, so that the first probe 400 and the second probe 500 can pass through the mounting plate 700 to slide in the housing 300, and on the other hand, the position limiting holes can also play a role in limiting the first probe 400 and the second probe 500, thereby ensuring the sliding stability of the first probe 400 and the second probe 500, and making the measurement result more accurate.

Further, the first probe 400 includes a first push rod 410, a first stopper 420 and a first reset member 430, the first stopper 420 is fixed on the first push rod 410, the first reset member 430 is sleeved on the first push rod 410, and two ends of the first reset member 430 are respectively abutted against the mounting plate 700 and the first stopper 420, when the first probe 400 is in an initial state of non-work, the first reset member 430 can press the first stopper 420 against the base 310, so as to complete the mounting work of the first probe 400, when the first probe 400 is in the initial state of non-work, the first reset member 430 can press the first stopper 420 against the base 310, so as to complete the mounting work of the first probe 400, when the first push rod 410 is in a work state, the first push rod 410 is abutted against the head of the fastener, the first push rod 410 is pressed upwards and moves upwards along the axial direction thereof, at this time, the first reset member 430 can play a role in buffering, and after the measurement is finished, the first push rod 410 is reset, and the first limit block 420 is continuously pressed on the base 310.

Optionally, the first reset member 430 in this embodiment may be a spring, on one hand, the spring has a simple structure, is easy to install, and has a low cost and a high economic benefit, and on the other hand, the spring has a large elastic deformation capability, a good vibration absorption effect, and a good use effect. Of course, in other embodiments, the first reset part 430 may also be another workpiece having a reset function, which is not limited in this embodiment.

Optionally, the second probe 500 includes a second top rod 510, a second limiting block 520, and a second reset member 530, the second limiting block 520 is fixed on the second top rod 510, the second reset member 530 is sleeved on the second top rod 510, and two ends of the second reset member 530 are respectively abutted against the mounting plate 700 and the second limiting block 520, when the second probe is in an initial state of non-working, the second reset member 530 can press the second limiting block 520 against the base 310, so as to complete the mounting work of the second probe 500, when the second probe is in a working state, the second top rod 510 is abutted against the surface of the skin, the second top rod 510 receives upward pressure and moves upward along the axial direction of the second top rod, at this time, the second reset member 530 can play a role of buffering, and reset the second top rod 510 after the measurement is finished, and the second limiting block 520 continues to be pressed against the base 310.

Optionally, the second reset element 530 in this embodiment may also be a spring, which has a simple structure, is easy to install, has a low cost and a high economic benefit, and has a large elastic deformation capability, a good vibration absorption effect, and a good use effect. Of course, in other embodiments, the second reset element 530 may also be another workpiece having a reset function, which is not limited in this embodiment.

Referring to fig. 5, each group of capacitive grating measurement systems includes a movable grating 610, a fixed grating 620 and a capacitive grating sensor, the movable grating 610 is fixed on the first top bar 410 of the first probe 400, and the fixed grating 620 is fixed on the second top bar 510 of the second probe 500, so that the relative displacement between the first probe 400 and the second probe 500 is the same as the relative displacement between the movable grating 610 and the fixed grating 620, and the capacitive grating sensor can acquire the relative displacement between the movable grating 610 and the fixed grating 620, i.e. the relative displacement between the first probe 400 and the second probe 500 can be obtained. Optionally, the density of the grids disposed on the moving grid 610 in this embodiment is greater than the density of the grids disposed on the fixed grid 620.

Furthermore, each group of capacitive grating measurement system comprises a data processing module, the data processing module is electrically connected with the capacitive grating sensors of the group, the capacitive grating sensors can transmit the relative displacement to the data processing module, the relative displacement is converted into the phase variation of an electric signal through the data processing module, and the data processing module is used for processing the phase variation to obtain the result data of the levelness.

With continued reference to fig. 4, the capacitance-grid measuring system further includes four displays 630, four displays 630 are provided in the embodiment, four displays 630 are respectively disposed on the corresponding positions of the top cover 320 corresponding to the four sets of the first probe 400 and the second probe 500, and each display 630 is electrically connected to the data processing module of the set for displaying the resulting data of the flatness of the set. Through the setting of display 630 for the data that obtains of measuring can show in real time, has improved the acquisition efficiency of measuring result, and can carry out many times repetition measurement fast, reduce and measure the error rate, improve the precision of measuring result.

The method comprises the following specific operation steps:

(1) taking out the flatness detection tool, checking whether the flatness detection tool is normal or not, and keeping the first probe 400 and the second probe 500 in a free state;

(2) the supporting plate 312 of the base 310 of the levelness detection tool is tightly attached to the reference surface, so that the first ejector rod 410 and the second ejector rod 510 are tightly attached to the reference surface, and zero operation of the levelness detection tool is performed;

(3) the supporting plate 312 of the base 310 of the flushness detection tool is tightly attached to the second workpiece 200 to be detected, in some embodiments, the first workpiece 100 is taken as a fastener, and the second workpiece 200 is taken as a skin for example, as shown in fig. 6, the head of the fastener is lower than the surface of the skin, at this time, the first ejector pin 410 and the second ejector pin 510 are compressed, the first ejector pin 410 is tightly attached to the first workpiece 100 under the pressure of the first resetting piece 430, the second ejector pin 510 is tightly attached to the second workpiece 200 under the pressure of the second resetting piece 530, and a relative displacement difference is generated between the first ejector pin 410 and the second ejector pin 510;

in other embodiments, as shown in fig. 7, the present flush detection tool can also be applied to the situation where the head of the fastener is higher than the surface of the skin, and similarly, the first push rod 410 and the second push rod 510 will be compressed, the first push rod 410 will be pressed by the first restoring member 430 to cling to the first workpiece 100, the second push rod 510 will be pressed by the second restoring member 530 to cling to the second workpiece 200, and a relative displacement difference is generated between the first push rod 410 and the second push rod 510;

(4) the relative displacement between the first probe 400 and the second probe 500 can be obtained by collecting the relative displacement between the moving grid 610 and the fixed grid 620 through the capacitive grid sensor, the capacitive grid sensor transmits the relative displacement to the data processing module, the data processing module converts the relative displacement into the phase variation of an electric signal, the leveling result data is obtained after data processing, and the four displays 630 respectively display the leveling result data of the first probe 400 and the second probe 500 in the corresponding group.

(5) The resulting data of the flush levels displayed on the 4 displays 630 are read and the maximum and minimum values are selected, i.e., the flush level range of the fastener and skin is obtained.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the utility model. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. A flushness detection tool for detecting flushness between a first workpiece (100) and a second workpiece (200), comprising:

the shell (300), the shell (300) includes the base (310) and the top cover (320), the top cover (320) is buckled on the base (310);

a first probe (400), wherein the first probe (400) is arranged through the base (310) and the top cover (320), the first probe (400) can slide in the shell (300), and one end of the first probe (400) is abutted with the first workpiece (100);

a second probe (500), wherein the second probe (500) is arranged through the base (310) and the top cover (320), the second probe (500) can slide in the shell (300), and one end of the second probe (500) is abutted with the second workpiece (200); and

the capacitive grating measuring system is arranged in the shell (300) and used for acquiring the relative displacement of the first probe (400) and the second probe (500), converting the relative displacement into the phase variation of an electric signal, and processing data to obtain the result data of the flatness.

2. The flatness detection tool according to claim 1, wherein the flatness detection tool is provided with a plurality of the first probes (400) and a plurality of the second probes (500), the number of the first probes (400) and the number of the second probes (500) are the same, each of the second probes (500) is arranged corresponding to one of the first probes (400), and the first probes (400) and the second probes (500) are uniformly distributed along the circumferential direction of the base (310).

3. The flatness detection tool according to claim 2, wherein the flatness detection tool is provided with a number of the capacitance measurement systems in the same number as the first probes (400), each of the capacitance measurement systems being provided corresponding to one of the first probes (400).

4. The flushness detection tool of claim 1, wherein a mounting plate (700) is disposed within the housing (300), and wherein the capacitive grating measurement system is disposed between the top cover (320) and the mounting plate (700).

5. The flushness detection tool of claim 4, wherein the first probe (400) comprises a first ejector rod (410), a first limiting block (420) and a first reset member (430), the first limiting block (420) is fixed on the first ejector rod (410), the first reset member (430) is sleeved on the first ejector rod (410), two ends of the first reset member (430) are respectively abutted against the mounting plate (700) and the first limiting block (420), and the first reset member (430) can press the first limiting block (420) on the base (310).

6. The flushness detection tool of claim 4, wherein the second probe (500) comprises a second ejector rod (510), a second limiting block (520) and a second reset member (530), the second limiting block (520) is fixed on the second ejector rod (510), the second reset member (530) is sleeved on the second ejector rod (510), two ends of the second reset member (530) are respectively abutted against the mounting plate (700) and the second limiting block (520), and the second reset member (530) can press the second limiting block (520) on the base (310).

7. The flushness detection tool of claim 1, wherein the capacitive grating measurement system comprises a movable grating (610), a fixed grating (620) and a capacitive grating sensor, the movable grating (610) is fixed on the first probe (400), the fixed grating (620) is fixed on the second probe (500), and the capacitive grating sensor is used for acquiring the relative displacement amount of the movable grating (610) and the fixed grating (620).

8. The flushness detection tool of claim 7, wherein a density of the grid provided on the moving grid (610) is greater than a density of the grid provided on the stationary grid (620).

9. The flushness detection tool of claim 7, wherein the capacitive grating measurement system comprises a data processing module, the data processing module is electrically connected with the capacitive grating sensor, the capacitive grating sensor transmits the relative displacement to the data processing module, the data processing module converts the relative displacement into a phase variation of an electrical signal, and the data processing module performs data processing to obtain the flushness result data.

10. The flushness detection tool of claim 9, wherein the capacitive gate measurement system further comprises a display (630), the display (630) being disposed on the top cover (320), the display (630) being electrically connected to the data processing module, the display (630) being configured to display resulting data of the flushness.

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