CN105222944B - The test method and high-temperature test device of locking torque test - Google Patents
The test method and high-temperature test device of locking torque test Download PDFInfo
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- CN105222944B CN105222944B CN201510597805.3A CN201510597805A CN105222944B CN 105222944 B CN105222944 B CN 105222944B CN 201510597805 A CN201510597805 A CN 201510597805A CN 105222944 B CN105222944 B CN 105222944B
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Abstract
The invention discloses the test method and high-temperature test device of a kind of locking torque test, during high temperature test, measures the maximum assembling torque that nut is screwed into experiment bolt first, before heating, then nut sample is heated, cooled down after being heated to setting time；Secondly, carry out multiple cyclic test and carry out recording overall process locking torque；Finally, then to nut heat, torque is screwed out to measurement at the temperature after the heating.Torque test is to complete at high temperature, and by the moment variations of comparative analysis in high temperature environments, the data drawn can more reflect the reliability in high temperature environments of nut.
Description
Technical field
The present invention relates to the test method and high-temperature test device of a kind of locking torque test.
Background technology
Condition of work is connected with the rapid development of aeronautical and space technology, between the matrix of Aero-Space engine and requires more next
It is higher, requirement to engine fasteners high-temperature behavior also more and more higher.The domestic test method to fastener mainly will examination
Test part to heat in high temperature environments, then cool down, the change of re-test locking torque after cooling（Main analog engine is from high temperature
To the reliability of cooling back nut）.Such as Chinese patent CN203502160U（Day for announcing 2014.03.26）Disclose ring flange
Device connecting bolt high temperature relaxes force measuring device, and the device includes the heating furnace with sealing fire door, in the burner hearth of heating furnace
Provided with experiment flange disk device.At the trial, the experiment flange disk device to be measured connected by connecting bolt is put into, connects spiral shell
Bolt torque spanner fastens and records initial spanner fastening force value, starts heating furnace and is heated, when temperature reaches requirement temperature
Afterwards, autocontrol relay is kept in-furnace temperature, and open motor, to rotating speed is required, motor passes through rotating shaft motoring ring test when rotating
Flange disk device rotates, working condition of the simulated test flange disk device in rotary state, a timing of operation process requirement
Between after, shut down take out experiment flange disk device, again with torque spanner detect connecting bolt fastening force value, and and start it is tight
Gu force value contrasts, then the numerical value of the relaxation force of fastening force after heated load operating can be obtained.
But the torque that is screwed into of the beginning of the test method measurement disclosed in above-mentioned measurement apparatus is before heating, and to survey
The torque of back-outing of amount is after connecting bolt cools down, can not truly to reflect locking torque in high temperature environments, also just not
Reliability of the engine in hot environment condition of work lower nut can be simulated.
The content of the invention
Tested it is an object of the invention to provide a kind of locking torque of locking torque of test fastener in high temperature environments
Test method；The present invention also provides a kind of high-temperature test device for being used to implement the test method simultaneously.
In order to realize the above object the technical scheme for the test method that locking torque is tested is as follows in the present invention：Coupling mechanism force
The test method of square test, comprises the following steps,
1）, nut is screwed into experiment bolt, then by the nut, bolt load machine for testing torsion corresponding fixture in,
The bolts and nuts relative moment back-outed is made by machine for testing torsion, is suspending machine for testing torsion, record is screwed into maximum for the first time
Torque, machine for testing torsion is then set to work on to complete first time loop test；
2）, using heater the nut, bolt are heated；
3）, the nut, bolt be cooled to indoor environment temperature, it is complete to the nut, bolt by machine for testing torsion
Into 15 loop tests, overall process locking torque is recorded；
4）, nut, bolt be reapposed on machine for testing torsion, and record the maximum moment being this time screwed into, Ran Houli
It is heated with heater；
5）, be heated to setting time after, back-out nut using machine for testing torsion, measure back-out torque at such a temperature.
Heater employed in step 2) is high temperature furnace, small to the nut, bolt heating 5 ~ 7 using high temperature furnace
When.
Step 4）Heating process in, the heater uses PID mode regulating and controlling temperatures, the heater to temperature
The control system and the TT＆C system for being exerted a force to the nut for spending regulation and control are isolated.
Step 5）The middle heat time set is 0.5 ~ 1.5 hour.
In step 5）Afterwards, whether the nut thread after checkout facility is destroyed.
The present invention is exclusively used in implementing the high temperature side trial assembly of the test method of locking torque test as described in claim 1
Put and adopt the following technical scheme that：The device includes machine for testing torsion, the nut clamp for clamping nut, for clamping bolt
Bolted fixture and the heater for being heated to nut, bolt, are provided between the machine for testing torsion and the nut and are used for
Transmit the connecting rod of moment of torsion.
The heater uses high temperature furnace, and the high temperature furnace includes heating furnace, grate and temperature control system.
The nut clamp is sleeve, and the sleeve has the connection end for being used for being connected with the connecting rod rotation stop.
The connecting rod uses heat-barrier material.
Beneficial effects of the present invention：The test method of the locking torque test of the present invention, during high temperature test, heating
Before measure the maximum assembling torque being screwed into, then nut sample is heated, is the temperature after the heating after being heated to setting time
Torque is screwed out to measurement under degree.Torque test is to complete at high temperature, by the moment variations of comparative analysis in high temperature environments,
The data drawn can more reflect the reliability in high temperature environments of nut.
Brief description of the drawings
Fig. 1 is the structural representation of the embodiment of high-temperature test device of the present invention；
Fig. 2 is the structural representation of machine for testing torsion in Fig. 1；
Fig. 3 is the structural representation of the ut socket in Fig. 1；
Fig. 4 is the structural representation of the connecting rod in Fig. 1.
Embodiment
The embodiment of the test method of locking torque test of the present invention：As Figure 1-4, comprise the following steps,（1）, will
Nut is screwed into experiment bolt, and nut, experiment bolt are fitted into corresponding sleeve, clicks on " startup " button of test device,
Start to test, test device includes the machine for testing torsion 2 to nut force, in the bolts and nuts relative moment back-outed, clicks on
" pause " button, record are screwed into maximum moment for the first time, click on " continuation " and complete to circulate for the first time；（2）And then by self-locking nut
Heated within 6 hours with 4 heated baking of high temperature furnace under standard set point of temperature；（3）, nut is cooled to indoor environment temperature,
With oil lubrication bolt, nut, 15 cyclic programs are set, first click on START button, dally half-turn when being screwed into, and is back-outing moment
Bolt, nut are loaded into relevant sleeve, complete 15 circulations, full mistake is carried out by passage deformeter and Testing Software, computer
Journey locking torque records；（4）Hot test is carried out at ambient temperature, and control is synchronized by machine for testing torsion and high-temperature cabinet
System, i.e., by exemplar 6（Nut, bolt）It is placed in high temperature furnace 4, is connected by the switching tooling for transmitting moment of torsion with machine for testing torsion
Connect, start to test, record is screwed into maximum assembling torque, then clicks on " pause " button, starts high-temperature cabinet, in standard set point of temperature
Lower baking 1 hour；（5）, reach the time as defined in standard after, click on " continuation " button, carry out back-outing power under the high-temperature temperature
Square is tested, while exemplar screw thread whether there is destruction after checkout facility.
Before the test, high temperature furnace is placed on machine for testing torsion 2 first, high temperature furnace is opened, by clamping nut sleeve 5
For the clamping of connecting rod 3 on machine for testing torsion chuck, sleeve is divided into ut socket, bolt collar, and nut, bolt sample are loaded into phase
The sleeve answered, high temperature furnace 4 is closed, open high temperature furnace control cabinet, form force moment testing device in a set of hot environment.
The present invention is used for the embodiment for implementing the high-temperature test device of the test method of locking torque test, and the device includes
Workbench, the machine for testing torsion 2 on workbench 1, the ut socket 5 for clamping nut, the bolt for clamping bolt
Sleeve 8 and the heater for being heated to nut, bolt, heater use high temperature furnace 4.Machine for testing torsion 2 and nut it
Between be provided with and be used to transmit the connecting rod 3 of moment of torsion, the support bar 7 for carrying bolt is provided between bolt and machine for testing torsion.Turn round
There is the guide rail 21 for being used for moving for the movable chuck of clamp standoff bar on torque test machine.To avoid heat transfer from being tried to moment of torsion
Test above the sensor of machine, connecting rod 3, support bar 7 have heat insulating function, are made of heat-barrier material.Ut socket 5, which has, to be used
In the placed cavity 51 of placing nut, ut socket 5 is the connection end being connected with connecting rod 3 with one end of placed cavity connection, is connected
End is connect to be connected with the rotation stop of connecting rod 3.Connection end has square hole 52, and the respective end of connecting rod 3 has the side being inserted into square hole 52
First 31.Bolt collar 8 has the placed cavity for placing bolt head, and the other end of bolt collar 8 is connected with support bar 7.
High temperature furnace maximum heating temperature is 900 DEG C, is made up of heating furnace, grate, temperature control system three parts.High temperature furnace
Power supply had a style of one's own with control system, temperature under stress condition of independent control and measurement sample, and being shown is and right
The TT＆C system of the machine for testing torsion of sample force is completely isolated, can exclude to interfere.Heater is applied when obtaining high temperature
Heating, using PID mode regulating and controlling temperatures, temperature control accurately, stably, has excessively stream, over-voltage protecting function.
In other embodiments, ut socket can also be had using other nut clamps come clamping for example with one end
Placed cavity, the other end for placing nut have the body for the square hole being connected with connecting rod, and placed cavity does not connect with square hole；
Square toes can be set in relative one end with placed cavity of this body, and square hole is set in the termination of corresponding connecting rod.
In other embodiments, bolt collar can also have other bolted fixtures to replace, and support bar can be with bolt collar
Integral structure type is set, the placed cavity of installation bolt is provided in one end of the close nut of support bar, bolt
Bolt head is relatively unrotatable in placed cavity, plays a part of clamping bolt by support bar.
In other embodiments, heater can use baking box.
In other embodiments, step（2）It is middle when self-locking nut to be used under standard set point of temperature to high temperature furnace heated baking
Between can be 5 hours or 7 hours；Step（4）In under standard set point of temperature baking time can be 0.5 hour or 1.5 hours.
Claims (7)
1. the test method of locking torque test, it is characterised in that：Comprise the following steps,
1）, nut is screwed into experiment bolt, then the nut, bolt are loaded in the corresponding fixture of machine for testing torsion, logical
Crossing machine for testing torsion makes the bolts and nuts relative moment back-outed, and suspends machine for testing torsion, and record is screwed into maximum moment for the first time,
Then machine for testing torsion is made to work on to complete first time loop test, the fixture includes the nut clip for clamping nut
Tool, the bolted fixture for clamping bolt, the connection for being used for transmitting moment of torsion is provided between the machine for testing torsion and the nut
Bar, connecting rod clamping are provided with the branch for carrying bolt on machine for testing torsion chuck, between the bolt and machine for testing torsion
Strut, there is the guide rail for being used for moving for the movable chuck of clamp standoff bar, connecting rod, support bar use on machine for testing torsion
Heat-barrier material is made, and the nut clamp is ut socket, and ut socket has the placed cavity for placing nut, ut socket
Be the connection end that is connected with connecting rod rotation stop with one end of placed cavity connection, connection end has square hole, the respective end of connecting rod
With the square toes being inserted into square hole, the bolted fixture is bolt collar, and bolt collar has the placement for placing bolt head
Chamber, the other end of bolt collar are connected with support bar；
2）, using heater the nut, bolt are heated；
3）, the nut, bolt be cooled to indoor environment temperature, 15 are completed to the nut, bolt by machine for testing torsion
Secondary loop test, record overall process locking torque；
4）, nut, bolt be reapposed on machine for testing torsion, and record the maximum moment being this time screwed into, then using plus
Thermal heats to it；
5）, be heated to setting time after, back-out nut using machine for testing torsion, measure back-out torque at such a temperature.
2. the test method of locking torque test according to claim 1, it is characterised in that：Adding employed in step 2)
Hot charging is set to high temperature furnace, and the nut, bolt are heated 5~7 hours using high temperature furnace.
3. the test method of locking torque test according to claim 1, it is characterised in that：Step 4）Heating process
In, the heater uses PID mode regulating and controlling temperatures, the control system to temperature adjusting of the heater with for pair
The TT＆C system of the nut force is isolated.
4. the test method of locking torque test according to claim 1, it is characterised in that：Step 5）The heating of middle setting
Time is 0.5~1.5 hour.
5. the test method of locking torque test according to claim 1, it is characterised in that：In step 5）Afterwards, examination is checked
Whether the nut thread after testing is destroyed.
6. being exclusively used in implementing the high-temperature test device of the test method of locking torque test as described in claim 1, it is special
Sign is：Nut clamp including machine for testing torsion, for clamping nut, the bolted fixture for clamping bolt and for spiral shell
Female, bolt heating heater, is provided with the connecting rod for being used for transmitting moment of torsion, even between the machine for testing torsion and the nut
Extension bar clamping is provided with the support bar for carrying bolt on machine for testing torsion chuck, between the bolt and machine for testing torsion,
There is the guide rail for being used for moving for the movable chuck of clamp standoff bar, connecting rod, support bar are using heat-insulated on machine for testing torsion
Material is made, and the nut clamp is ut socket, and ut socket has a placed cavity for placing nut, ut socket with
One end of placed cavity connection is the connection end being connected with connecting rod rotation stop, and connection end has square hole, and the respective end of connecting rod has
The square toes being inserted into square hole, the bolted fixture are bolt collar, and bolt collar has the placed cavity for placing bolt head, spiral shell
The other end of bolt sleeve is connected with support bar.
7. high-temperature test device according to claim 6, it is characterised in that：The heater uses high temperature furnace, described
High temperature furnace includes heating furnace, grate and temperature control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510597805.3A CN105222944B (en) | 2015-09-18 | 2015-09-18 | The test method and high-temperature test device of locking torque test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510597805.3A CN105222944B (en) | 2015-09-18 | 2015-09-18 | The test method and high-temperature test device of locking torque test |
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| CN105222944A CN105222944A (en) | 2016-01-06 |
| CN105222944B true CN105222944B (en) | 2018-01-02 |
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| CN201510597805.3A Active CN105222944B (en) | 2015-09-18 | 2015-09-18 | The test method and high-temperature test device of locking torque test |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108375444B (en) * | 2016-11-25 | 2021-06-01 | 中国航发沈阳黎明航空发动机有限责任公司 | Self-locking nut locking torque measuring method |
| CN108225887B (en) * | 2017-12-14 | 2020-09-22 | 中国特种飞行器研究所 | Corrosion detection method for bolt standard parts |
| CN109443613B (en) * | 2018-09-30 | 2019-08-16 | 南京工程学院 | A kind of torsion-testing apparatus and test method of automatic door lock mechanism |
| CN110146373B (en) * | 2019-05-29 | 2022-09-16 | 上海航天设备制造总厂有限公司 | Standard fastener low temperature mechanical properties test fixture |
| CN111946516A (en) * | 2020-07-29 | 2020-11-17 | 东风商用车有限公司 | Device and method for measuring influence of engine thermal load on attenuation of fuel injector compression torque |
| CN112781774B (en) * | 2020-12-03 | 2022-12-09 | 江苏洛克电气集团有限公司 | Stator core lamination riveting quality detection method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU699372A1 (en) * | 1975-10-06 | 1979-11-25 | Предприятие П/Я Г-4903 | Device for determining twisting moments at tightening bolted joints |
| CN202631369U (en) * | 2012-07-06 | 2012-12-26 | 重庆大学 | High-strength bolt high-temperature mechanics performance test device |
| CN203502160U (en) * | 2013-10-31 | 2014-03-26 | 重庆机电职业技术学院 | Apparatus for measuring high temperature relax force of connection bolt of flange apparatus |
| 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 |
| CN104833572B (en) * | 2015-05-21 | 2017-11-10 | 河南航天精工制造有限公司 | Bolt tension test tool and the tensile test apparatus using the test tool |
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