CN203191201U - Bolt connection adaptability testing device and clamp thereof - Google Patents

Bolt connection adaptability testing device and clamp thereof Download PDF

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Publication number
CN203191201U
CN203191201U CN 201320160535 CN201320160535U CN203191201U CN 203191201 U CN203191201 U CN 203191201U CN 201320160535 CN201320160535 CN 201320160535 CN 201320160535 U CN201320160535 U CN 201320160535U CN 203191201 U CN203191201 U CN 203191201U
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CN
China
Prior art keywords
cylinder body
outer cylinder
bolt
test
inner barrel
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Expired - Fee Related
Application number
CN 201320160535
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Chinese (zh)
Inventor
许彦伟
郭启义
朱李云
刘海涛
殷银银
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Henan Aerospace Precision Machining Co Ltd
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Henan Aerospace Precision Machining Co Ltd
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Priority to CN 201320160535 priority Critical patent/CN203191201U/en
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Publication of CN203191201U publication Critical patent/CN203191201U/en
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Abstract

The utility model discloses a bolt connection adaptability testing device and a clamp thereof. The clamp of the testing device comprises an internal cylinder body and an external cylinder body. The internal cylinder body is provided with an internal hole, which is in a in a rotation-stopping cooperation with a head part of a testing bolt. A rear opening of the external cylinder is provided with a plugging plate, and the plugging plate is provided with a guiding hole, through which passes a rod part of the testing bolt. A front opening of the guiding hole is provided with a hole edge used to stop the head part of the testing bolt. When in use, a user can choose the internal cylinder body having the shape of the internal hole corresponding to the shape of the head part of the testing bolt, and the rotation-stopping cooperation between the internal cylinder body and the external cylinder body can be used to guarantee the rotation-stopping assembly of the testing bolt on a tail seat by the clamp; a nut is rotatably disposed on the threaded segment of the rod part of the testing bolt by the driving device, and the corresponding parameter of the connection between the bolt and the nut can be tested, and therefore the internal cylinder body is suitable for the testing bolt having the same shape of the head part, and the internal cylinder body can be conveniently disassembled from the external cylinder body by the profile rotation-stopping cooperation between the internal cylinder body and the external cylinder body.

Description

Bolt connects compatibility test device and anchor clamps thereof
Technical field
The utility model relates to machanical fastener experimental technique field, relates in particular to a kind of bolt and connects the compatibility test device, also relates to the anchor clamps that use on this test unit simultaneously.
Background technology
Along with a large amount of uses of height locking firmware on the Aero-Space model, in assembling process, also show some problems gradually, as screw thread pull that button, high locked bolts screw thread are broken, Closely locking nut six sides twist flat etc., have a strong impact on the high locking bolted strength of joint of firmware and assembly quality, for the position problem that erecting yard may be occurred exposes in advance, in order in time take corresponding solution, be necessary height locking firmware is carried out compatibility test.In the existing machinery securing member experimental technique field, test unit of a great variety, but they have a something in common, that is exactly that anchor clamps on every kind of test unit include sensor, offer the perforation that the bar portion passed for bolt is passed on the sensor, in use, the head of bolt passes through spanner, modes such as unit clamp are clamped in a side of sensor, bar portion at bolt screws the test nut that is in the sensor opposite side simultaneously, in will testing the process that nut screws, obtain relevant data by the snap-in force that measurement bolt head or test nut are applied on the sensor, but because of the spanner that is clamped on the bolt head, force application parts such as unit clamp must be chosen specially according to selected bolt of when test, so make anchor clamps on every kind of test unit all must have a kind of unit clamp according to a certain anchor design, this has just caused the problem of test unit versatility difference, improve bolt and connected the experimentation cost of compatibility test, thereby increased the production cost of securing member.
The utility model content
The bolt that the purpose of this utility model provides a kind of highly versatile connects the compatibility test device, the anchor clamps that use on this test unit also are provided simultaneously, have been intended to solve the problem of the versatility difference of anchor clamps in the test unit of securing member compatibility test in the prior art.
In order to realize above purpose, the technical scheme of anchor clamps of the present utility model is as follows:
Anchor clamps, comprise for ending rotation set and be contained in the inner barrel on the test bolt head and end rotation set and be located at outer cylinder body on the inner barrel periphery, inner barrel have for the test bolt head pass and with the test bolt head only revolve the endoporus that cooperates, rear port at outer cylinder body is provided with the shutoff plate that cooperates with inner barrel rear end block, offer with the inner barrel endoporus pilot hole that is communicated with, also passes for the bar portion of test bolt at the shutoff plate, have the edge of passing for the head that stops the test bolt, hole on the front port of pilot hole.
The endoporus of described outer cylinder body is shoulder hole, convex with the annular that cooperates with step block in the outer cylinder body endoporus on the one end periphery of inner barrel and turn edge, on the periphery of described inner barrel and the profile on the inwall of outer cylinder body only revolve structure and be separately positioned on the outer peripheral face that described annular turns edge and on the big stomidium wall of outer cylinder body endoporus.
Inner barrel has for only revolving the endoporus that is connected with the head profile of test bolt, is processed with interior profile on the periphery of inner barrel, is processed with outer mold surface on the endoporus hole wall of outer cylinder body, and described interior profile is only revolved with the outer mold surface profile and cooperated.
Convex with on the periphery of outer cylinder body for sensor on the shoulder hole hole wall on the annular retaining edge that cooperates of step block.
The technical scheme that bolt of the present utility model connects the compatibility test device is as follows:
Bolt connects the compatibility test device, comprise sensor, offer the pilot hole of the front and back extension of passing for the test bolt shank on the sensor, the front aperture of described pilot hole is equipped with anchor clamps along last block, anchor clamps comprise for ending rotation set and are contained in the inner barrel on the test bolt head and only revolve the coaxial outer cylinder body that is set on the inner barrel periphery, inner barrel has the test of confession bolt head and passes, and with the test bolt head only revolve the endoporus that cooperates, rear port at outer cylinder body is provided with the shutoff plate that cooperates with inner barrel rear end block, offer with the inner barrel endoporus at the shutoff plate and to be communicated with, and for the pilot hole that the bar portion of test bolt is passed, has the edge of passing for the head that stops the test bolt, hole on the front port of pilot hole; Be provided with described outer cylinder body in the front side of anchor clamps and only revolve the tailstock that cooperates; Rear side at described sensor is provided with for the drive unit that screws the test nut at the test bolt shank, offer on the drive unit for the mounting hole for the test nut column of submerging, be processed with on the hole wall of mounting hole for test nut profile only revolve cooperate only revolve structure.
The endoporus of described outer cylinder body is shoulder hole, convex with the annular that cooperates with step block in the outer cylinder body endoporus on the one end periphery of inner barrel and turn edge, on the periphery of described inner barrel and the profile on the inwall of outer cylinder body only revolve structure and be separately positioned on the outer peripheral face that described annular turns edge and on the big stomidium wall of outer cylinder body endoporus.
Described tailstock has for penetrating big section of outer cylinder body endoporus, being pressed on the positioning end on the outer cylinder body endoporus step so that described annular is turned edge, and is processed with the profile structure that profile on the inwall with outer cylinder body is only revolved respective outer side edges on the periphery of positioning end.
Inner barrel has for only revolving the endoporus that is connected with the head profile of test bolt, is processed with interior profile on the periphery of inner barrel, is processed with outer mold surface on the endoporus hole wall of outer cylinder body, and described interior profile is only revolved with the outer mold surface profile and cooperated.
Be folded with between drive unit and the sensor be used to being set in the annular gasket of test on the bolt shank, annular gasket has for the ring end face that cooperates along block with the hole of pilot hole.
Convex with annular retaining edge on the periphery of outer cylinder body; Also offer the stair-stepping pilot hole that is connected with the butt joint of described pilot hole on the sensor, have on the hole wall of pilot hole for keep off the step that cooperates along block with described annular.
Anchor clamps of the present utility model are by interior, outer cylinder body constitutes, in, outer cylinder body only revolves coaxial package together, and behind the rear end of outer cylinder body, be provided with the shutoff plate of block inner barrel, offer the pilot hole that passes for the bar portion of test bolt at the shutoff plate, the edge, hole of pilot hole is to cooperate with the head block of test bolt, in use, the user can according to the nose shape of test bolt select to have corresponding in the inner barrel of hole shape (even when the head of test bolt is cylindric shape, also can be processed as flat by the head that cut will be tested bolt), in passing through again, only revolving between the outer cylinder body cooperates the warranty test bolt to end spinning by anchor clamps to fit on the tailstock, revolve at the bar portion thread segment of testing bolt by drive unit again and establish nut, test out bolted relevant parameter, thereby the test bolt that makes a kind of inner barrel to be applicable to have same nose shape, and in passing through, profile between the outer cylinder body is only revolved cooperation, the assurance inner barrel can be pulled down from outer cylinder body easily, and in having reduced in use, the problem that stress is concentrated between the outer cylinder body, and then solved the problem of the versatility difference of anchor clamps in the test unit of securing member compatibility test in the technology.Simultaneously because being direct block, the head of test bolt is engaged in pilot hole hole on the outer cylinder body rear end along last, so that just ending spinning with the test bolt, inner barrel fits over, there is not axial block relation between the two, improved the right alignment between test bolt and the outer cylinder body, avoided in process of the test, because of head and the caused test error of the coaxiality deviation between the outer cylinder body of test bolt, improved the test accuracy that adopts the utility model test unit.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of anchor clamps among Fig. 1;
Fig. 3 is the structural representation of inner barrel among Fig. 2;
Fig. 4 is the left view of Fig. 3;
Fig. 5 is the structural representation of outer cylinder body among Fig. 2;
Fig. 6 is the left view of Fig. 5.
Embodiment
Bolt of the present utility model connects the embodiment of compatibility test device, and to shown in Figure 6, this test unit is made of the tailstock 3, anchor clamps 1, sensor 2, annular gasket 5 and the drive unit 4 that set gradually backward in the past as Fig. 1.
Anchor clamps 1 are again to be combined by inside and outside cylindrical shell 6,7, and the endoporus of inner barrel 6 only revolves the flat hole 6-1 that the cross section that cooperates is flat for being used for the head profile of test bolt 8, and inner barrel 6 is shorter than outer cylinder body 7.Inside and outside cylindrical shell 6,7 coaxial being set-located, and be processed with profile in correspondence on the inwall of outer cylinder body 7 and on the periphery of inner barrel 6 and only revolve structure, namely the inwall at outer cylinder body 7 is processed with interior profile, periphery at inner barrel 6 is processed with outer mold surface, this profile is only revolved hexagonal hole hole wall that structure is outer cylinder body 7 and six square toes outer peripheral faces of inner barrel 6, and inside and outside cylindrical shell 6,7 only revolves the structure profile by this profile and only revolves cooperation.The endoporus of outer cylinder body 7 is shoulder hole, the annular that is convexly equipped with on step on the shoulder hole hole wall and the inner barrel 6 end peripheries 6-2 block that turns edge cooperates, and on the inwall of outer cylinder body 7 and on the outer peripheral face of the profile on the periphery of inner barrel 6 is only revolved on the big stomidium wall that structure is in described shoulder hole respectively and described annular turns edge 6-2.Be processed with the shutoff plate 7-1 for the little end opening of shutoff outer cylinder body 7 on the small end port of outer cylinder body 7, this shutoff plate 7-1 and outer cylinder body 7 are wholely set, and offer pilot hole 7-2 at shutoff plate 7-1, and this pilot hole 7-2 is through hole.
Sensor 2 is made of two parts, a part is the matrix part 2-1 of block structure, another part is the side plate 2-2 of platy structure, side plate 2-2 is erected on the projection at position, edge of matrix part 2-1, and offer the pilot hole 2-3 that passes of bar portion for test bolt 8 at side plate 2-2, the stomidium of pilot hole 2-3 is along cooperating to stop the head of testing bolt 8 to pass pilot hole 2-3 with shutoff plate 7-1, and the hole of the other end is along cooperating to stop test nut 9 to pass with annular gasket 5.Offer the stair-stepping pilot hole 2-4 that is docked and connected with pilot hole 2-3 on the matrix part 2-1, the big end port of this pilot hole 2-4 is on the side of matrix part 2-1 away from side plate 2-2, small end is communicated with pilot hole 2-3 by the gap between matrix part 2-1 and the side plate 2-2, and the annular that is convexly equipped with on the step on the pilot hole 2-4 hole wall and the periphery of outer cylinder body 7 is kept off and being cooperated along the 7-3 block.
Tailstock 3 has the positioning end 3-1 for the column of the endoporus that penetrates outer cylinder body 7, is processed with the profile structure that profile on the inwall with outer cylinder body 7 is only revolved respective outer side edges on the periphery of positioning end 3-1, and this profile structure is the outer peripheral face of six square toes.
Offer on the drive unit 4 for the mounting hole 4-1 for test nut 9 column of submerging, be processed with on the hole wall of mounting hole 4-1 for test nut 9 profiles only revolve cooperate only revolve structure, this only revolves the hole wall that structure is hexagonal hole.
Annular gasket 5 is used for being set in the bar portion of test bolt 8, and is in the outside, pilot hole 2-3 end of sensor 2, and an end ring end face of annular gasket 5 cooperates along block with the hole of pilot hole 2-3.
The utility model in use, at first inner barrel 6 is pressed in the outer cylinder body 7, to test bolt 8 again sinks in the anchor clamps 1, and the head of test bolt 8 is adjacent on the inner plate surface of shutoff plate 7-1, pass in the sensor 2 subsequently in the lump, carry out spacingly by the annular on outer cylinder body 7 peripheries retaining along cooperating with step block on the matrix part 2-1 pilot hole 2-4 hole wall of sensor 2, at this moment, the thread segment of testing bolt 8 bar portions exposes from the side plate 2-2 outer plate surface of sensor 2; Then, annular gasket 5 is set on the test bolt 8, and on the side plate 2-2 lateral surface that is sticked at sensor 2; At last, test nut 9 is screwed in gently the thread segment of test bolt 8, the positioning section of tailstock 3 is inserted in the endoporus of outer cylinder body 7, end spinning by anchor clamps 1 and fit on the positioning end 3-1 of tailstock 3 will test bolt 8, and test nut 9 profiles are ended in the mounting hole 4-1 that spinning fits over drive unit 4, make drive unit 4 according to the rotational speed of setting, until testing twisting into two parts of nut 9, finish whole compatibility test process, can the key parameter in the simulated field assembling process be read out by the program of setting.
Wherein, test bolt 8 is the high speed bolt, test nut 9 is adaptive Closely locking nut, in use obtain by the related data on the sensor 2 in the fracture groove fracture process of test nut 9, the screw thread of test bolt 8 pulls and buckle, the high locked bolts screw thread is broken, the performance evaluating of the stubborn aspect such as flat of Closely locking nut six sides.
The utility model in use, even the user can according to the nose shape of test bolt 8 select to have corresponding in the head of inner barrel 6(test bolt 8 of hole shape when being cylindric shape, also can be processed as flat by the head that cut will be tested bolt 8), in passing through again, outer cylinder body 6, profile between 7 is only revolved and is cooperated warranty test bolt 8 to end spinning by anchor clamps 1 to fit on the tailstock 3, revolve at the bar portion thread segment of testing bolt 8 by drive unit 4 again and establish bolt, test out bolted relevant parameter, therefore a kind of inner barrel 6 can be applicable to the test bolt 8 with same nose shape in the utility model, and in passing through, outer cylinder body 6, profile between 7 is only revolved cooperation, assurance inner barrel 6 can be pulled down from outer cylinder body 7 easily, and in having reduced in use, outer cylinder body 6, the problem that stress is concentrated between 7;
The endoporus of outer cylinder body 7 is shoulder hole, convex with the annular 6-2 that turns edge on the inner barrel 6 end peripheries, shortened the assembling length of inner barrel 6 in outer cylinder body 7 by cooperation between the two, thereby shortened the time of anchor clamps 1 assembling, and by what profile was only revolved cooperation heart effect guaranteed the time saving and energy saving accurate assembling of finishing anchor clamps 1;
In use, shutoff plate 7-1 is between the head and sensor 2 side plate 2-2 of test bolt 8, thereby stoped the head of test bolt 8 to contact with sensor 2 the direct of side plate 2-2, avoided testing between bolt 8 heads and the bar portion transition structure to the crush injury of sensor 2 side plate 2-2;
In use, the big end of outer cylinder body 7 can sink in the macropore section of the last pilot hole 2-4 of sensor 2 matrix part 2-1, connects the shared space of compatibility test device thereby dwindled whole bolt.
In the above-described embodiments, sensor is made of matrix part and side plate two parts, the wherein effect played of the matrix part assembling effect of just leading, therefore in other embodiments, sensor also can only arrange side plate, just connects the locking positioning that guarantees sensor by the bolt between test bolt and the test nut.
In the above-described embodiments, the endoporus of inner barrel is flat hole, and in other embodiments, flat hole also can use the hole of shapes such as square opening, Hua Xingkong, hexagonal hole, nicked circular port to replace, these belong to profile and only revolve concrete structure in the connection, therefore repeat no more; Profile between the corresponding inside and outside cylindrical shell is only revolved downlink connection also can be by in the said structure, and the profile except hexagonal hole hole wall and hexagonal prism outer peripheral face is only revolved fit structure and replaced.
In the above-described embodiments, convex with annular retaining edge on the periphery of outer cylinder body, the purpose on this annular retaining edge is positioning fixture external in sensor base portion, in other embodiments, also can remove this annular retaining edge, rely on being connected between test bolt and the sensor side board, anchor clamps are limited on the sensor.
The embodiment of anchor clamps of the present utility model:, in the above-described embodiments, describe in detail about the concrete structure of anchor clamps to shown in Figure 6 as Fig. 1, therefore repeat no more in the present embodiment.

Claims (10)

1. anchor clamps, it is characterized in that, comprise inner barrel and only revolve the coaxial outer cylinder body that is set on the inner barrel periphery, inner barrel have for the test bolt head pass and with the test bolt head only revolve the endoporus that cooperates, rear port at outer cylinder body is provided with the shutoff plate that cooperates with inner barrel rear end block, offer with the inner barrel endoporus pilot hole that is communicated with, also passes for the bar portion of test bolt at the shutoff plate, have the edge of passing for the head that stops the test bolt, hole on the front port of pilot hole.
2. anchor clamps according to claim 1, it is characterized in that, the endoporus of described outer cylinder body is shoulder hole, convex with the annular that cooperates with step block in the outer cylinder body endoporus on the one end periphery of inner barrel and turn edge, on the periphery of described inner barrel and the profile on the inwall of outer cylinder body only revolve structure and be separately positioned on the outer peripheral face that described annular turns edge and on the big stomidium wall of outer cylinder body endoporus.
3. anchor clamps according to claim 1 and 2, it is characterized in that inner barrel has for only revolving the endoporus that is connected with the head profile of test bolt, is processed with interior profile on the periphery of inner barrel, be processed with outer mold surface on the endoporus hole wall of outer cylinder body, described interior profile is only revolved with the outer mold surface profile and is cooperated.
4. anchor clamps according to claim 1 and 2 is characterized in that, convex with on the periphery of outer cylinder body for sensor on the shoulder hole hole wall on the annular retaining edge that cooperates of step block.
5. bolt connects the compatibility test device, comprise sensor, offer the pilot hole of the front and back extension of passing for the test bolt shank on the sensor, it is characterized in that, the front aperture of described pilot hole is equipped with anchor clamps along last block, anchor clamps comprise for ending rotation set and are contained in the inner barrel on the test bolt head and end rotation set and be located at outer cylinder body on the inner barrel periphery, inner barrel has the test of confession bolt head and passes, and with the test bolt head only revolve the endoporus that cooperates, rear port at outer cylinder body is provided with the shutoff plate that cooperates with inner barrel rear end block, offer with the inner barrel endoporus at the shutoff plate and to be communicated with, and for the pilot hole that the bar portion of test bolt is passed, has the edge of passing for the head that stops the test bolt, hole on the front port of pilot hole; Be provided with described outer cylinder body in the front side of anchor clamps and only revolve the tailstock that cooperates; Rear side at described sensor is provided with for the drive unit that screws the test nut at the test bolt shank, offer on the drive unit for the mounting hole for the test nut column of submerging, be processed with on the hole wall of mounting hole for test nut profile only revolve cooperate only revolve structure.
6. bolt according to claim 5 connects the compatibility test device, it is characterized in that, the endoporus of described outer cylinder body is shoulder hole, convex with the annular that cooperates with step block in the outer cylinder body endoporus on the one end periphery of inner barrel and turn edge, on the periphery of described inner barrel and the profile on the inwall of outer cylinder body only revolve structure and be separately positioned on the outer peripheral face that described annular turns edge and on the big stomidium wall of outer cylinder body endoporus.
7. bolt according to claim 6 connects the compatibility test device, it is characterized in that, described tailstock has for penetrating big section of outer cylinder body endoporus, being pressed on the positioning end on the outer cylinder body endoporus step so that described annular is turned edge, and is processed with the profile structure that profile on the inwall with outer cylinder body is only revolved respective outer side edges on the periphery of positioning end.
8. connect the compatibility test device according to claim 5 or 6 described bolts, it is characterized in that, inner barrel has for only revolving the endoporus that is connected with the head profile of test bolt, be processed with interior profile on the periphery of inner barrel, be processed with outer mold surface on the endoporus hole wall of outer cylinder body, described interior profile is only revolved with the outer mold surface profile and is cooperated.
9. connect the compatibility test device according to claim 5 or 6 described bolts, it is characterized in that, be folded with between drive unit and the sensor be used to being set in the annular gasket of test on the bolt shank, annular gasket has for the ring end face that cooperates along block with the hole of pilot hole.
10. connect the compatibility test device according to claim 5 or 6 described bolts, it is characterized in that, convex with annular retaining edge on the periphery of outer cylinder body; Also offer the stair-stepping pilot hole that is connected with the butt joint of described pilot hole on the sensor, have on the hole wall of pilot hole for keep off the step that cooperates along block with described annular.
CN 201320160535 2013-04-02 2013-04-02 Bolt connection adaptability testing device and clamp thereof Expired - Fee Related CN203191201U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201320160535 CN203191201U (en) 2013-04-02 2013-04-02 Bolt connection adaptability testing device and clamp thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201320160535 CN203191201U (en) 2013-04-02 2013-04-02 Bolt connection adaptability testing device and clamp thereof

Publications (1)

Publication Number Publication Date
CN203191201U true CN203191201U (en) 2013-09-11

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104390737A (en) * 2014-11-26 2015-03-04 河南航天精工制造有限公司 Screwdriver slot torque test method of fastener and test device for implementing the method
CN104405751A (en) * 2014-11-26 2015-03-11 河南航天精工制造有限公司 External-threaded self-locking nut vibration test tool
CN106197820A (en) * 2016-08-29 2016-12-07 上海百若试验仪器有限公司 The integrated form pressure of a kind of Multifunctional bolt fastening system turns round duplex measurement device
CN108239918A (en) * 2018-01-15 2018-07-03 魏志峰 A kind of horizontal shock-absorbing device for bridge
CN109520924A (en) * 2018-11-29 2019-03-26 哈尔滨汽轮机厂有限责任公司 Metal Substrate workpiece surface sheet metal coating strength detecting method in conjunction with ontology

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104390737A (en) * 2014-11-26 2015-03-04 河南航天精工制造有限公司 Screwdriver slot torque test method of fastener and test device for implementing the method
CN104405751A (en) * 2014-11-26 2015-03-11 河南航天精工制造有限公司 External-threaded self-locking nut vibration test tool
CN104405751B (en) * 2014-11-26 2017-01-18 河南航天精工制造有限公司 External-threaded self-locking nut vibration test tool
CN104390737B (en) * 2014-11-26 2017-02-22 河南航天精工制造有限公司 Screwdriver slot torque test method of fastener and test device for implementing the method
CN106197820A (en) * 2016-08-29 2016-12-07 上海百若试验仪器有限公司 The integrated form pressure of a kind of Multifunctional bolt fastening system turns round duplex measurement device
CN108239918A (en) * 2018-01-15 2018-07-03 魏志峰 A kind of horizontal shock-absorbing device for bridge
CN109520924A (en) * 2018-11-29 2019-03-26 哈尔滨汽轮机厂有限责任公司 Metal Substrate workpiece surface sheet metal coating strength detecting method in conjunction with ontology

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Granted publication date: 20130911

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