CN212340214U - Pneumatic measuring head and pneumatic measuring device for measuring aperture of blind hole - Google Patents
Pneumatic measuring head and pneumatic measuring device for measuring aperture of blind hole Download PDFInfo
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- CN212340214U CN212340214U CN202021054930.2U CN202021054930U CN212340214U CN 212340214 U CN212340214 U CN 212340214U CN 202021054930 U CN202021054930 U CN 202021054930U CN 212340214 U CN212340214 U CN 212340214U
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- 239000000523 sample Substances 0.000 claims description 18
- 238000005259 measurement Methods 0.000 abstract description 18
- 238000010586 diagram Methods 0.000 description 5
- 230000005489 elastic deformation Effects 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 1
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Abstract
The utility model provides a pneumatic gauge head and pneumatic measuring device for measuring aperture of blind hole, pneumatic gauge head wherein includes: the measuring head body is internally provided with a gas passing channel for communicating a gas source, and the top of the measuring head body is oppositely provided with two gas outlet holes communicated with the gas passing channel; the measuring head comprises two elastic pieces which are arranged in one-to-one correspondence with the two air outlets, the lower ends of the elastic pieces are connected to the measuring head body, the upper ends of the elastic pieces are opposite to the air outlets, and the upper ends of the elastic pieces are free ends. The utility model discloses can satisfy and be less than 2 mm's little blind hole's aperture measurement to the hole length to the measurement accuracy of blind hole has been promoted.
Description
Technical Field
The utility model relates to an examine the utensil field, especially relate to a pneumatic gauge head and pneumatic measuring device for measuring the aperture of blind hole.
Background
The pneumatic measuring device can be used for measuring the aperture of the blind hole on the workpiece, is non-contact measurement, and has narrow tolerance band of the detected dimension and high required precision; the working principle of the pneumatic measuring device is as follows: the measuring head is provided with an air outlet, the air outlet is connected with compressed air through an air flue, the air outlet is close to the measured blind hole during measurement, a gap exists between the measuring head and the inner wall of the measured blind hole, and the compressed air escapes from the gap. The change of the air pressure can cause the change of the air charging pressure due to the change of the gaps with different sizes, the pressure is converted into related electric signals to a data processing element, the data is processed by utilizing the singlechip computer technology, the data is processed by utilizing the computer technology, the size change quantity of the relative calibration (or reference) hole of the aperture of the blind hole to be detected can be obtained, and finally the aperture numerical value of the blind hole to be detected is obtained.
The pneumatic measuring device in the prior art can only realize the measurement of the blind hole to be measured with the hole length more than 2mm generally, and the measuring precision can only reach 1 um.
SUMMERY OF THE UTILITY MODEL
The utility model discloses, the utility model provides a pneumatic gauge head in aperture for measuring blind hole on the one hand, its concrete technical scheme as follows:
a pneumatic probe for measuring the bore diameter of a blind bore, comprising:
the measuring head body is internally provided with a gas passing channel for communicating a gas source, and the top of the measuring head body is oppositely provided with two gas outlet holes communicated with the gas passing channel;
the measuring head comprises two elastic pieces which are arranged in one-to-one correspondence with the two air outlets, the lower ends of the elastic pieces are connected to the measuring head body, the upper ends of the elastic pieces are opposite to the air outlets, and the upper ends of the elastic pieces are free ends.
In some embodiments, two grooves corresponding to the two air outlet holes one to one are formed in the outer wall of the probe body along the vertical direction, the upper ends of the grooves are communicated with the corresponding air outlet holes, and the two elastic pieces are respectively arranged in one groove.
In some embodiments, the probe body is cylindrical, the diameter of the probe body is smaller than the aperture of the blind hole to be measured, and the distance between the free ends of the two elastic pieces in the free state is greater than the aperture of the blind hole to be measured.
In some embodiments, the measuring head body is arranged on the mounting seat, and the air passing channel extends downwards and penetrates through the mounting seat.
The utility model discloses another aspect provides a measuring device for be used for measuring the aperture of blind hole, it includes pneumatic gauge head, survey table and air supply unit, wherein: an air cavity is formed in the measuring table; the pneumatic measuring head is arranged on the measuring table and adopts any one of the pneumatic measuring heads, and the air passing channel is communicated with the air cavity; the air source device is connected to the measuring table through a pipeline and is communicated with the air cavity.
Compared with the prior art, the utility model provides a pneumatic gauge head and can satisfy and measure the aperture of the little blind hole that is less than 2mm to the hole length to the measurement accuracy of blind hole has been promoted.
Drawings
Fig. 1 is a schematic structural diagram of the pneumatic measuring head of the present invention at a viewing angle;
fig. 2 is a schematic structural diagram of the pneumatic measuring head of the present invention at another viewing angle;
fig. 3 is a schematic structural diagram of the pneumatic measuring device of the present invention at a viewing angle;
fig. 4 is a schematic structural diagram of the pneumatic measuring device of the present invention at another viewing angle;
FIG. 5 is a schematic diagram of a calibration ring gauge.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
As shown in fig. 1 to 2, the pneumatic probe 10 of the present invention includes a probe body 11 and two elastic pieces 14 connected to the probe body 11. Wherein:
the measuring head body 11 is internally provided with a gas passing channel 12 used for communicating a gas source, and the top of the measuring head body 11 is oppositely provided with two gas outlet holes 13 communicated with the gas passing channel 12.
The two elastic pieces 14 are arranged in one-to-one correspondence with the two air outlet holes 13, the lower ends of the elastic pieces 14 are connected to the measuring head body 11, the upper ends of the elastic pieces 14 are opposite to the air outlet holes 13, and the upper ends of the elastic pieces 14 are free ends.
Optionally, two grooves (not shown) corresponding to the two air outlet holes 13 one to one are formed in the outer wall of the probe body 11 along the vertical direction, the upper ends of the grooves are communicated with the corresponding air outlet holes 13, and the two elastic pieces 14 are respectively arranged in one groove.
Optionally, the probe body 11 is cylindrical, the diameter of the probe body 11 is smaller than the aperture of the blind hole to be detected, and the distance between the free ends of the two elastic pieces 14 in the free state is greater than the aperture of the blind hole to be detected.
The measurement process of the pneumatic measuring head 10 in this embodiment on the blind hole to be measured is as follows:
firstly, the calibration ring gauge 30 shown in fig. 5 is sleeved on the measuring head body 11, so that the two elastic pieces 14 enter the inner hole 31 of the calibration ring gauge 30, and the two elastic pieces 14 are subjected to a first elastic deformation so as to abut against the hole wall of the inner hole 31 of the calibration ring gauge 30. And starting the gas source device, blowing gas into the gas passing channel 12, entering a gap (calibration gap) between the elastic sheet 14 and the hole wall of the inner hole 31 through the gas outlet hole 13, and finally overflowing from the calibration gap. As described in the background, a reference air pressure corresponding to the calibration gap is obtained by the pressure measuring mechanism.
Then, a part to be measured is arranged on the measuring head body 11, the two elastic pieces 14 enter into a blind hole to be measured on the part, and the two elastic pieces 14 are subjected to second elastic deformation to abut against the inner wall of the inner hole of the calibration ring gauge. And starting the gas source device again, blowing gas into the gas passage 12, entering a gap (measurement gap) between the elastic sheet 14 and the wall of the blind hole to be measured through the gas outlet 13, and finally overflowing from the measurement gap. Similarly, at this time, a measurement air pressure corresponding to the measurement gap is obtained by the pressure measuring mechanism.
And finally, calculating the aperture of the blind hole to be measured based on the difference between the measured air pressure and the reference air pressure and the size of the inner hole of the calibration ring gauge.
The utility model discloses add two flexure strips 14 on gauge head body 11, the elastic deformation of flexure strip 14 can reflect the small change in aperture to promote measurement accuracy.
The utility model discloses can satisfy the measurement to the blind hole that is 0.6mm-2mm long, measurement accuracy reaches 0.4 um.
Optionally, the utility model discloses a pneumatic gauge head 10 still includes mount pad 15, and gauge head body 11 sets up on mount pad 15, crosses gas channel 12 downwardly extending and runs through mount pad 15.
The utility model also provides a pneumatic measuring device, as shown in fig. 3 to fig. 4, this pneumatic measuring device includes pneumatic gauge head 10, measuring station 20 and air supply unit (not shown), wherein: an air cavity is formed in the measurement stage 20. The pneumatic measuring head 10 is arranged on the measuring table 20, the pneumatic measuring head 10 in any embodiment is adopted as the pneumatic measuring head 10, and the air passing channel 12 of the pneumatic measuring head 10 is communicated with the air cavity.
The air supply means is connected to the measurement station 20 via a conduit and communicates with the air chamber. In the measuring process, the air source device is started, and high-pressure air in the air source device enters an air cavity of the measuring table 20 and is pressed into an air passing channel 12 of the pneumatic measuring head 10 communicated with the air cavity.
Optionally, in order to implement parallel measurement and improve the measurement efficiency, more than two pneumatic measuring heads 10 are arranged on the measuring table 20. Each pneumatic probe 10 is detachably attached to the measuring table 2 for easy maintenance and replacement.
The invention has been described above with a certain degree of particularity and detail. It will be understood by those of ordinary skill in the art that the description of the embodiments is merely exemplary and that all changes that may be made without departing from the true spirit and scope of the present invention are intended to be within the scope of the present invention. The scope of the invention is defined by the appended claims rather than by the foregoing description of the embodiments.
Claims (5)
1. A pneumatic probe for measuring the bore diameter of a blind bore, the pneumatic probe comprising:
the measuring head body is internally provided with a gas passing channel for communicating a gas source, and the top of the measuring head body is oppositely provided with two gas outlet holes communicated with the gas passing channel;
the measuring head comprises two elastic pieces which are arranged in one-to-one correspondence with the two air outlets, the lower ends of the elastic pieces are connected to the measuring head body, the upper ends of the elastic pieces are opposite to the air outlets, and the upper ends of the elastic pieces are free ends.
2. A pneumatic measuring head according to claim 1, wherein two grooves corresponding to the two air outlet holes one by one are formed in the outer wall of the measuring head body in the vertical direction, the upper ends of the grooves communicate with the corresponding air outlet holes, and the two elastic pieces are respectively disposed in one of the grooves.
3. A pneumatic probe according to claim 1, wherein said probe body is cylindrical, the diameter of said probe body is smaller than the diameter of the blind hole to be measured, and the distance between the free ends of said two elastic pieces in the free state is larger than the diameter of the blind hole to be measured.
4. A pneumatic probe according to claim 1, further comprising a mounting block on which the probe body is disposed, the air passage extending downwardly and through the mounting block.
5. The utility model provides a pneumatic measuring device, its characterized in that, pneumatic measuring device includes pneumatic gauge head, measuring station and air supply unit, wherein:
an air cavity is formed in the measuring table;
the pneumatic measuring head is arranged on the measuring table, the pneumatic measuring head adopts the pneumatic measuring head of any one of claims 1 to 4, and the air passing channel is communicated with the air cavity;
the air source device is connected to the measuring table through a pipeline and is communicated with the air cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021054930.2U CN212340214U (en) | 2020-06-10 | 2020-06-10 | Pneumatic measuring head and pneumatic measuring device for measuring aperture of blind hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021054930.2U CN212340214U (en) | 2020-06-10 | 2020-06-10 | Pneumatic measuring head and pneumatic measuring device for measuring aperture of blind hole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212340214U true CN212340214U (en) | 2021-01-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021054930.2U Active CN212340214U (en) | 2020-06-10 | 2020-06-10 | Pneumatic measuring head and pneumatic measuring device for measuring aperture of blind hole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212340214U (en) |
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2020
- 2020-06-10 CN CN202021054930.2U patent/CN212340214U/en active Active
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