CN107238456B - A kind of disconnecting switch clamping force test fixture - Google Patents
A kind of disconnecting switch clamping force test fixture Download PDFInfo
- Publication number
- CN107238456B CN107238456B CN201710348035.8A CN201710348035A CN107238456B CN 107238456 B CN107238456 B CN 107238456B CN 201710348035 A CN201710348035 A CN 201710348035A CN 107238456 B CN107238456 B CN 107238456B
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- pressure sensor
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- clamping force
- test fixture
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- 238000012360 testing method Methods 0.000 title claims abstract description 37
- 210000002445 nipple Anatomy 0.000 claims abstract description 17
- 230000035515 penetration Effects 0.000 claims description 17
- 238000003825 pressing Methods 0.000 claims description 13
- 238000013461 design Methods 0.000 claims description 4
- 230000005526 G1 to G0 transition Effects 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 11
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000003068 static effect Effects 0.000 description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 239000004411 aluminium Substances 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical compound [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The present invention provides a kind of disconnecting switch clamping force test fixtures, including cross section arched the first press section and the second press section, the bowstring part of two press sections is oppositely arranged, between be equipped with pressure sensor, it is provided with nipple on first stress surface of pressure sensor, is provided with threaded hole on the second stress surface, pressure sensor and the second press section are fixedly linked by fastener, it is provided with rotational structure on second press section, fastener can be made corresponding with threaded hole by rotating with after the connection of the first press section in pressure sensor.The beneficial effects of the present invention are: after pressure sensor is connect with the first press section, fastener can realize the connection of the second press section and pressure sensor in rotational structure by rotating on corresponding with pressure sensor upper screwed hole.The setting of rotational structure weakens the precession angle of pressure sensor for fixing the influence of the second press section using fastener, ensure that the assembly precision of test fixture, reduces measurement error.
Description
Technical field
The present invention relates to a kind of disconnecting switch clamping force test fixtures.
Background technique
Current high-voltage alternating current isolating switch product, such as scissor disconnecting switch, clamp type disconnecting switch are being assembled
When at rear progress delivery test, it is required to measure the clamping force between its dynamic and static contact, at this moment just needs one kind can
Simulate the clamping force measuring device of static contact shape.Authorization Notice No. is CN103217245B, and authorized announcement date is
2016.03.09 Chinese invention patent discloses a kind of disconnecting switch clamping force measuring device, which includes that cross section is equal
Arched the first press section and the second press section, the bowstring part of two press sections is oppositely arranged, between be equipped with pressure sensing
Two stress surfaces of device, pressure sensor are fixedly connected with the first press section and the second press section respectively, specifically pressure sensing
Nipple is come on one stress surface of device, the threaded hole there are three circumference uniform distribution, assembly are carried on another stress surface
When pressure sensor is fixed on the first press section first with nipple, then the second press section is fixed using screw
On pressure sensor, fixation hole corresponding with nipple is provided on the first press section thus, is arranged on the second press section
There are three screw perforations corresponding with pressure sensor upper screwed hole.
After the assembly is completed, the outer peripheral surface of the first press section and the second press section constitutes a circumference, just simulates so quiet
The shape of contact, the moving contact being just similar under truth when two sides moving contact applies pressure to two press sections squeeze stationary contact
Head, to complete the measurement of clamping force.It is found in use, due to needing first to install pressure sensor, pressure sensor is installed
Cheng Hou, three threaded holes thereon must be corresponding with the screw perforation on the second press section, could be fixed on the second press section
On pressure sensor, otherwise hole is once staggered, and will be unable to fix the second press section.Meanwhile pressure sensor screws in first and squeezes
Depth in portion will will affect the cylindricity for the circumference that the first press section after the assembly is completed and the second press section are constituted, pressure sensing
Device screw-in depth is excessive or too small all will be unable to the most true static contact shape of simulation.
Therefore, when pressure sensor need to meet threaded hole and the screw perforation on the second press section to it is corresponding when its every time
The angle of rotation must all be 120 degree, in practical application, and the nipple of used pressure sensor is usually the spiral shell of M4
Line, screw pitch 0.7mm, when pressure sensor rotates 120 degree, the length of precession is the one third of 0.7mm, is
0.23mm, therefore pressure sensor is during precession, the influence to above-mentioned circle diameter are 0.23,0.46,0.7mm, and
The diameter tolerance of true static contact generally all within 0.05mm, is squeezed considerably beyond this allowable tolerance, therefore by first
Circle diameter composed by portion and the second press section is unable to accurately control, then the clamping force as measured by the measuring device is simultaneously
It is not most really, there is biggish measurement errors.
Summary of the invention
The purpose of the present invention is to provide the disconnecting switch clamping force test fixtures that one kind can reduce measurement error.
In order to solve the above-mentioned technical problem, the present invention adopts the following technical scheme:
A kind of disconnecting switch clamping force test fixture is squeezed including the first arched press section of cross section and second
Portion, the bowstring part of two press sections is oppositely arranged, between be equipped with pressure sensor, pressure sensor have the first stress surface and
Second stress surface, is provided with the nipple for being fixedly connected with the first press section on the first stress surface, on the second stress surface
It is provided with the threaded hole for being fixedly connected with the second press section, pressure sensor and the second press section pass through fastener stationary phase
Even, the rotational structure for rotating for fastener relative to pressure sensor center, the rotation knot are provided on the second press section
Structure can make fastener corresponding with the threaded hole by rotating with after the connection of the first press section in pressure sensor.
The rotational structure is the long arc-shaped holes being provided on the second press section, the fastener be across long arc-shaped holes with
The bolt of threaded hole cooperation.
The fastener includes fastening block and fastening bolt, is offered on fastening block for corresponding to the threaded hole
One bolt penetration hole, the rotational structure are the circular hole being arranged concentrically with sensor being provided on the second press section, and fastening block can
Rotation is assemblied in the circular hole.
The circular hole is ladder circular hole, and fastening block is assemblied in the aperture of ladder circular hole, and the fastener further includes setting
In the macropore of ladder circular hole for compressing the pressing plate of fastening block, be provided on pressing plate for corresponding with the first bolt penetration hole
Second bolt penetration hole.
It is provided on first press section for the connector fixation hole with the cooperation of the nipple of pressure sensor, the connector
Fixation hole is made of the inner hole for the hard thread bush being fixed on the first press section.
The jackscrew limited for new designs of threaded joints is further fixed in the inner hole of hard thread bush.
Disconnecting switch further includes being fixed on the first press section to be used for across the second press section with clamping force test fixture
The guide post that second press section is oriented to and is supported.
Guide post perforation is provided on second press section, guide post perforation is long hole.
The both ends of first press section are provided with the limited block moved axially for limiting the second press section along the first press section.
It is provided on the limited block for disconnecting switch to be fixed pinnacled fixed structure with clamping force test fixture.
The beneficial effects of the present invention are: due to be provided on the second press section for for fastener relative to pressure sensing
The rotational structure of device center rotation, in this way after pressure sensor and the first press section, which are realized, to be connected, screw thread on pressure sensor
Hole may rotate to arbitrary position, and fastener can pass through itself relative in pressure sensor in rotational structure at this time
The rotation of the heart, so that on corresponding with pressure sensor upper screwed hole, to realize the connection of the second press section and pressure sensor.
For fixing the influence of the second press section using fastener, i.e., the setting of rotational structure weakens the precession angle of pressure sensor
Influence for the circle diameter as composed by the first press section and the second press section may be implemented to press by reasonably designing
Force snesor electrodeless adjustment within the scope of 360 degree does not affect fastener finally and fixes the second press section, thereby may be ensured that survey
The assembly precision of trial work dress, reduces measurement error.
Detailed description of the invention
Fig. 1 is the usage state diagram of the embodiment 1 of disconnecting switch clamping force test fixture in the present invention；
Fig. 2 is the vertical view cut away view of Fig. 1；
Fig. 3 is the partial enlarged view in Fig. 2；
Fig. 4 is the main view of Fig. 1；
Fig. 5 is the main view cut away view of Fig. 1；
Fig. 6 is the three-dimensional structure diagram of the first press section；
Fig. 7 is the main view cut away view of the first press section；
Fig. 8 is the three-dimensional structure diagram of the second press section；
Fig. 9 is the main view cut away view of the second press section；
Figure 10 is the three-dimensional structure diagram of guide post；
Figure 11 is the main view of guide post；
Figure 12 is the structure chart of pressing plate；
Figure 13 is the structure chart of fastening block；
Figure 14 is the structure chart of pressure sensor；
Figure 15 is the right view of Figure 14；
Figure 16 is the three-dimensional structure diagram of hard thread bush；
Figure 17 is the main view cut away view of hard thread bush；
Figure 18 is the vertical view cut away view of disconnecting switch clamping force test fixture embodiment 2；
Figure 19 is the main view of Figure 18；
Figure 20 is the structure chart of the second press section in Figure 19.
In figure: 1. first conducting rods；2. the second conducting rod；3. cylinder；31. the first fixation hole；32. the first press section；33.
Limit cylinder；34. the second fixation hole；35. third fixation hole；36. the 4th fixation hole；4. the second press section；41. the first perforation；
42. the second perforation；43. long arc-shaped holes；5. pressure sensor；51. sensor signal lines；52. nipple；53. threaded hole；6.
Guide post；61. guide support section；62. fixed section；63. limited step；7. hard thread bush；71. the 5th fixation hole；72. cooperation
Step；73. large-diameter thread；8. jackscrew；9. fastening block；91. the first bolt penetration hole；10. pressing plate；101. the second bolt penetration hole；
11. the first contact；12. the second contact；13. fastening bolt；14. fastening screw；15. fixed plate；16. nut.
Specific embodiment
For the embodiment 1 of disconnecting switch clamping force test fixture as shown in Fig. 1 ~ Figure 17, which is by an aluminium
Stick is split to form with wire cutting again after turnery processing, and the material red copper of the hardness of aluminium bar and true static contact is close, not rapid wear
Hurt moving contact, therefore can preferably simulate the working condition of true static contact, and price is relatively cheap.Aluminium bar after cutting
Including the second arched press section 4 of cylinder 3 and cross section, cylinder 3 include arched the first press section 32 in cross section and
Cylindrical body (i.e. limit cylinder 33) positioned at 32 both ends of the first press section.The bowstring portion of first press section 32 and the second press section 4
Point be oppositely arranged, between be equipped with pressure sensor 5, pressure sensor 5 has the first stress surface and the second stress surface, the first stress
The nipple 52 for being fixedly connected with the first press section 32 is come on face, is come on the second stress surface for second
The threaded hole 53 that press section 4 is fixedly connected, threaded hole 53 are evenly distributed with there are three and around the center circumferential of pressure sensor 5.
The connector fixation hole for cooperating with the nipple 52 of pressure sensor 5 is provided on first press section 32, by
It is aluminium in the material of cylinder 3, and nipple 52 is the screw thread of a M4, and screw pitch is 0.7mm, height of thread 0.35mm,
Under stress condition, the threaded hole being easily damaged on aluminium bar, the screw thread being also easy to damage on pressure sensor causes test fixture
Failure.In order to avoid such case, a hard thread bush 7 is first fixed on the first press section 32, thus the first press section 32
On offer third fixation hole 35 for installing hard thread bush 7, i.e. the 5th fixation hole 71 of the inner hole of hard thread bush 7 is constituted
The connector fixation hole cooperated with nipple 52, hard thread bush 7 are made of intensity and the higher material of hardness, and screw thread is strong
Degree is high, is hardly damaged, and outside is connect using large-diameter thread 73 with the first press section 32, and design has one biggish to match
It closes step 72 and undertakes normal pressure.
By in the 5th fixation hole 71 of 52 precession of nipple of pressure sensor 5, during precession, constantly measurement by
The diameter of circumference composed by first press section 32 and the second press section 4 illustrates that pressure passes when tolerance is within the scope of 0.05mm
Sensor 5 has been mounted to position, installs one in the other end of the 5th fixation hole 71 at this time and is limited for new designs of threaded joints 52
The jackscrew 8 of position, to limit the screw-in depth of nipple 52, and makes gapless at screw thread, and nipple 52 is avoided to shake,
Guarantee measurement accuracy, prolongs the service life.
After pressure sensor 5 installs, the second press section 4 is installed on pressure sensor 5 by fastener.This is tight
Firmware includes fastening block 9, pressing plate 10 and fastening bolt 13, and first for assembling fastener is provided on the second press section 4 and is worn
Hole 41, which is ladder circular hole, and fastening block 9 is assemblied in the aperture of ladder circular hole, and pressing plate 10 is assemblied in ladder circle
In the macropore in hole, pressing plate 10 is pressed on the step surface of fastening block 9 and ladder circular hole.Fastening block 9 and pressing plate 10 and pressure
Sensor 5 is coaxial arrangement, opens up that there are three the first bolt penetration hole 91 corresponding with 53 position of threaded hole, pressing plates on fastening block 9
It is opened up on 10 there are three the second bolt penetration hole 101 corresponding with 91 position of the first bolt penetration hole, the position of pressure sensor 5 determines
After, it, can be by the first bolt penetration hole 91 and the second bolt penetration hole 101 and pressure sensing by rotational fastener block 9 and pressing plate 10
The threaded hole 53 of device is corresponding, and the fixation of the second press section 4 and pressure sensor then can be completed using fastening bolt 13.Therefore
First perforation 41 that is to say the rotation knot for rotating for fastener relative to center sensor being arranged on the second press section
Structure can just be such that fastener is freely rotatable by the rotational structure, therefore regardless of the threaded hole 53 on pressure sensor rotates
To where, fastener by itself rotation can be corresponding.
Since the second press section 4 is entirely to be fixed on pressure sensor by fastener, itself also has certain weight
Power has the tendency that tilting down under normal circumstances, this will will affect measurement accuracy.In order to balance the gravity of the second press section,
It supports and is oriented to, guide post 6 is installed on the second press section 4, the guide post 6 is including guide support section 61 and admittedly
Determine section 62, the second fixation hole 34 is provided on the first press section 32, fixed section 62 is threadedly coupled with the second fixation hole 34, and second squeezes
The second perforation 42 is provided on splenium 4, guide support section 61 passes through the second perforation 42, and the second perforation 42 is long hole.This is
Due to there are two one the first from left right sides of pressure sensor for being arranged between the first press section 32 and the second press section 4, corresponding hard spiral shell
Line set, fastener, guide post etc. also have two sets, and when actual measurement, when the pressure sensor when side is first pressurized, the other side will be to
Outer movement " tilts ", at this moment the limited step 63 in guide post 6 will play position-limiting action, avoids this side is excessive from " sticking up
It rises ".Simultaneously as the perforation of guide support section 61 is long hole, therefore the long hole can guarantee that the second press section has micro rolling
It moves and is unlikely to by not dead.In addition, the limit cylinder 33 of 32 left and right sides of the first press section plays the role of limited block, thus will
Second press section 4 is limited in the groove body on cylinder 3, prevents it along the axial movement of the first press section.
Disconnecting switch is with the working principle of clamping force test fixture: fixing in use, true static contact can be simulated
Situation so that entire test fixture is suspended on a cross-arm in test workshop, therefore is provided on limit cylinder 33
For by the fixed pinnacled fixed structure of test fixture, which to be the first fixation hole 31, solid across first with steel wire
Determine hole 31, the other end of steel wire is fixed on cross-arm.But in fact, due to scissor disconnecting switch or clamp type
The height of disconnecting switch is relatively high, does not have suitably to fix the position of cross-arm in workshop, at this time can be first solid by test fixture
It is scheduled on the conducting rod of side, i.e., the first press section 32 is fixed on two the first conducting rods 1.Specifically the first press section 32
Back of a bow part be provided with the 4th fixation hole 36, using fastening screw 14, fixed plate 15 and nut 16 by the first conducting rod 1 and the
One press section 32, which is realized, to be fixed, and guarantees that the first contact 11 on the first conducting rod 1 connects with the back of a bow part of the first press section 32
Touching.
When test, the sensor signal lines 51 of pressure sensor 5 are connected in display (not shown), first squeezes
Splenium 32 is mobile with the first conducting rod 1, when the second conducting rod 2, which is moved to the second contact 12 thereon, clamps test fixture, i.e.,
The size that clamping force can be observed by display, completes the test of clamping force.Test fixture of the invention is relative to existing skill
For art, in assembly, pressure sensor can arbitrarily rotate entire test fixture within the scope of 360 degree, not rotated by 120 degree
The limitation of angle, while after pressure sensor installs, the rotation by fastener relative to pressure sensor center, i.e.,
The bolt penetration hole on fastener can be made corresponding with the screw thread hole site on pressure sensor, realize and fix, substantially increase test
The assembly precision of tooling guarantees that the authenticity of measured clamping force, measurement error substantially reduce.
The embodiment 2 of disconnecting switch clamping force test fixture is as shown in Figure 18 ~ Figure 20, and in this embodiment, being used for will
The fastener that second press section 4 is fixed on the first press section only has fastening bolt 13, same as the prior art, fastening bolt 13
There are three, three threaded holes on pressure sensor are respectively corresponded, the difference is that the bolt penetration hole being arranged on the second press section is
Long hole, i.e. long arc-shaped holes 43, at this time after pressure sensor is assemblied on the first press section, long arc-shaped holes 43 are to be easier
Can be corresponding with pressure sensor upper screwed hole, though can not achieve electrodeless adjustment, can adapt to press to a certain extent
The precession depth of force snesor improves the assembly precision of test fixture, reduces measurement error.In this embodiment, long arc-shaped holes
43 be to pass through for fastener and it can be made relative to the rotational structure of pressure sensor center rotation.
In the other embodiments of disconnecting switch clamping force test fixture: the limited block at the first press section both ends can not
It is cylindrical body, for example can be tetragonal body；Fixed structure on limited block can not be hole, for example be lifting lug；First press section
Both ends can also be not provided with limited block；Guide post on second press section, which is perforated, can not be long hole, but round hole；Second
Guide post can be not provided on press section；Jackscrew can be not provided in the inner hole of hard thread bush；It can also be on first press section
It is not provided with hard thread bush, but directly processes connector fixation hole on the first press section；Fastener can not include pressing plate,
At this moment fastening block can come with end face of flange；When the threaded hole on pressure sensor there are two or at four, fastening block, pressing plate
On bolt penetration hole it is corresponding also there are two or four or the second press section on long arc-shaped holes it is corresponding also there are two or
Four.
Claims (7)
1. a kind of disconnecting switch clamping force test fixture is squeezed including the first arched press section of cross section and second
Portion, the bowstring part of two press sections is oppositely arranged, between be equipped with pressure sensor, pressure sensor have the first stress surface and
Second stress surface, is provided with the nipple for being fixedly connected with the first press section on the first stress surface, on the second stress surface
It is provided with the threaded hole for being fixedly connected with the second press section, pressure sensor and the second press section pass through fastener stationary phase
Even, it is characterised in that: the rotation knot for rotating for fastener relative to pressure sensor center is provided on the second press section
Structure, the rotational structure can make fastener after pressure sensor is connect with the first press section by rotation and the threaded hole pair
It answers, the threaded hole is uniformly distributed there are three and around the center circumferential of pressure sensor, and the fastener includes fastening block and fastening spiral shell
Bolt opens up on fastening block there are three the first bolt penetration hole corresponding with the screw thread hole site, and the rotational structure is to be provided with
The circular hole being arranged concentrically with sensor on second press section, the circular hole are ladder circular hole, and fastening block is rotatable to be assemblied in
In the aperture of ladder circular hole, the fastener further includes the pressure for being used to compress fastening block being arranged in the macropore of ladder circular hole
Plate, opens up that there are three the second bolt penetration holes corresponding with the first bolt penetration hole position on pressing plate；By fastener relative to pressure
The rotation of center sensor keeps the first bolt penetration hole on fastener corresponding with the screw thread hole site on pressure sensor.
2. disconnecting switch according to claim 1 clamping force test fixture, it is characterised in that: be arranged on the first press section
Have for the connector fixation hole with the cooperation of the nipple of pressure sensor, the connector fixation hole is by being fixed on the first press section
On hard thread bush inner hole constitute.
3. disconnecting switch according to claim 2 clamping force test fixture, it is characterised in that: the inner hole of hard thread bush
In be further fixed on the jackscrew limited for new designs of threaded joints.
4. disconnecting switch according to claim 1 clamping force test fixture, it is characterised in that: disconnecting switch clamping force
Test fixture further includes being fixed on the first press section to be used to that the second press section to be oriented to and be propped up across the second press section
The guide post of support.
5. disconnecting switch according to claim 4 clamping force test fixture, it is characterised in that: be arranged on the second press section
There is guide post perforation, guide post perforation is long hole.
6. disconnecting switch according to claim 1 clamping force test fixture, it is characterised in that: the both ends of the first press section
It is provided with the limited block moved axially for limiting the second press section along the first press section.
7. disconnecting switch according to claim 6 clamping force test fixture, it is characterised in that: be arranged on the limited block
Have for disconnecting switch to be fixed pinnacled fixed structure with clamping force test fixture.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710348035.8A CN107238456B (en) | 2017-05-17 | 2017-05-17 | A kind of disconnecting switch clamping force test fixture |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710348035.8A CN107238456B (en) | 2017-05-17 | 2017-05-17 | A kind of disconnecting switch clamping force test fixture |
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| CN107238456B true CN107238456B (en) | 2019-09-13 |
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| CN109406379B (en) * | 2018-12-18 | 2024-05-28 | 广东电网有限责任公司 | Contact material corrosion test tool and system |
| CN111024287A (en) * | 2019-12-11 | 2020-04-17 | 广西电网有限责任公司桂林供电局 | Isolator touches and indicates comprehensive clamp force testing arrangement |
| CN111337173B (en) * | 2020-02-28 | 2021-11-19 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | System for measuring locking force of wedge-shaped packaging slot of electronic module |
| CN111256896A (en) * | 2020-03-24 | 2020-06-09 | 广西玉柴机器股份有限公司 | Bolt clamp force testing arrangement |
| CN112880896A (en) * | 2021-01-05 | 2021-06-01 | 国网内蒙古东部电力有限公司电力科学研究院 | Isolating switch contact finger pressure sensor, tester and method |
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| JP2001235379A (en) * | 2000-02-25 | 2001-08-31 | Toshiba Tungaloy Co Ltd | Socket for measuring axial force incorporated with ultrasonic probe |
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| Publication number | Publication date |
|---|---|
| CN107238456A (en) | 2017-10-10 |
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