CN207007399U - A kind of torque coefficient of bolt test device - Google Patents
A kind of torque coefficient of bolt test device Download PDFInfo
- Publication number
- CN207007399U CN207007399U CN201720900318.4U CN201720900318U CN207007399U CN 207007399 U CN207007399 U CN 207007399U CN 201720900318 U CN201720900318 U CN 201720900318U CN 207007399 U CN207007399 U CN 207007399U
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- Prior art keywords
- bolt
- measured
- pressure rings
- torque coefficient
- test device
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Abstract
The utility model belongs to transmission route survey instrument and equipment technical field, more particularly to a kind of torque coefficient of bolt test device, including fixture, pressure rings, bolt connection pair to be measured, torque wrench and resistance strain gauge, bolt connection pair to be measured includes bolt to be measured and the clamp nut being engaged with bolt to be measured, pressure rings are set on the screw rod of bolt to be measured, and pressure rings are an entirety by clamp nut and bolt to be measured fastening；Pressure rings are connected with resistance strain gauge；Fixture is fixedly installed and is used to clamp clamp nut；The sleeve being adapted to the head of bolt to be measured is connected with torque wrench, sleeve is set in the head of bolt to be measured.It can be operated on universal testing machine using the device, and precision is high, speed is fast, simple and convenient, safe and reliable, the test of particularly suitable batch torque coefficient of bolt.
Description
【Technical field】
The utility model belongs to transmission route survey instrument and equipment technical field, and in particular to a kind of torque coefficient of bolt is surveyed
Trial assembly is put.
【Background technology】
Electric power pylon node is formed by connecting using connecting plate by common galvanized bolt more, in installation process, absolutely mostly
Number bolt must all apply pretightning force.Due to directly controlling pretightning force relatively difficult, typically by controlling Tightening moment come indirectly
Ground controls pretightning force.Tightening moment is too small to cause that structure is partially dangerous, and Tightening moment, which crosses conference, causes gasket seal to be crushed to death
And the fracture for the screw rod that follows the string, causes.The relation (i.e. torque coefficient) between Tightening moment and pretightning force is thus determined, to knot
The safe operation of structure and reliable use have important practical significance.
At present, the test to torque coefficient mainly passes through the side to bolt adhering resistance strain sheets or using axle power meter
Formula.The former needs to paste every suit tested bolt foil gauge, and troublesome in poeration, the experiment preparatory period is longer；The latter needs a system
Supporting experimental rig is arranged to be tested.Experimentation cost is very high, cumbersome, especially for non-professional fastener measuring unit
It is difficult to possess these special equipments, this just carrys out greatly inconvenience to the measuring band of torque coefficient.
【Utility model content】
To solve the above problems, the purpose of this utility model is to provide a kind of torque coefficient of bolt test device, use
The device can be operated on universal testing machine, and precision is high, speed is fast, simple and convenient, safe and reliable, particularly suitable
The test of batch torque coefficient of bolt.
The purpose of this utility model is achieved through the following technical solutions：
A kind of torque coefficient of bolt test device, including fixture, pressure rings, torque wrench and resistance strain gauge, pressure rings
It is set on the screw rod of bolt to be measured, clamp nut is threaded with the screw rod of bolt to be measured, pressure rings, clamp nut are with treating
It is an entirety to survey bolt fastening；Pressure rings are connected with resistance strain gauge；Fixture is fixedly installed and is used to clamp clamp nut；Turn round
The sleeve being adapted to the head of bolt to be measured is connected with square spanner, sleeve is set in the head of bolt to be measured.
The bolt to be measured is arranged with the first pad and the second pad respectively in the both sides of pressure rings.
The surface of first pad and the second pad is provided with anti-skid structure.
Sliding sleeve is also arranged with the screw rod of the bolt to be measured, between being between sliding sleeve and the screw rod of bolt to be measured
Gap coordinates, and pressure rings are sheathed on the outer ring of sliding sleeve, coordinates between pressure rings and sliding sleeve for gap, the length of sliding sleeve
Thickness of the degree less than pressure rings.
The inner surface of pressure rings offers chute vertically, and the position that the outer surface of sliding sleeve is corresponding with chute is provided with
The tongue being adapted with chute.
Upper table of the chute along pressure rings opens up downwards, and length is less than the thickness of pressure rings；Tongue is along sliding sleeve
Upper surface is set from top to bottom, and the length of tongue is less than the length of chute.
The fixture includes left fixture and right fixture, and left fixture and right fixture are offered for pressing from both sides in their intersection
Hold the groove of clamp nut.
The groove is V-shaped groove.
The fixture is fixedly installed on pedestal.
Compared with prior art, the utility model has the advantages that：
It is fixed that torque coefficient of bolt test device of the present utility model is applied by torque wrench and sleeve to bolt to be measured
Moment of torsion, measure the pretightning force of screw rod by pressure rings and axial strain shown by resistance strain gauge, pass through surveys it is axial
The torque arithmetic for straining and drafting obtains torque coefficient k, and all operations of the present utility model can be completed on universal testing machine,
And convenient and simple, securely and reliably, cost is very low, it is adapted to the test of batch torque coefficient of bolt so that the efficiency of manual work
Largely improved.
Further, the utility model can reduce pressure suffered by pressure rings by the first pad and the second pad, no
It is fragile, at the same can also be suffered by counterpressure ring surface pressure, make pressure rings that there is preferable axially loaded condition, produce
Accurate axial strain so that test the data obtained is more accurate, ensures the reliability of torque coefficient of bolt to be measured.
Further, the utility model can prevent from fastening spiral shell by the anti-skid structure of the first pad and the second gasket surface
Skidded between female and fixture；Skidded between first pad and pressure rings and between the second pad and pressure rings.
Further, the utility model on the screw rod of bolt to be measured by being arranged sleeve, sliding sleeve and bolt to be measured
Screw rod between coordinate for gap, pressure rings are sheathed on the outer ring of sliding sleeve, match somebody with somebody between pressure rings and sliding sleeve for gap
Close, ensure that bolt to be measured is in the center of pressure rings hole, so as to eliminate because pressure czermak space causes bolt to be measured
Screw rod activity and caused error in pressure rings hole, meanwhile, when needing to measure the bolt of different size, need to only change with
The sliding sleeve that bolt lattice to be measured match can meet the test of different size bolt, so as to greatly reduce experimentation cost.
【Brief description of the drawings】
Fig. 1 is the overall schematic of torque coefficient of bolt test device of the present utility model；
Fig. 2 is the structural representation of fixture of the present utility model；
Fig. 3 is that bolt connection pair to be measured of the present utility model is illustrated with the position before the assembling of sleeve and torque wrench
Figure；
Fig. 4 is the structural representation of pressure rings of the present utility model；
Fig. 5 is the structural representation of sliding sleeve of the present utility model.
Wherein, 1 be pedestal, 2 be fixture, 2-1 is groove, 2-2 is right fixture, 2-3 is left fixture, 3 is pressure rings, 3-1
For chute, 3-2 be the first hole, 4 be sleeve, 5 be torque wrench, 6 be connecting line, 7 be resistance strain gauge, 8 be bolt to be measured,
8-1 is the first pad, 8-2 is the second pad, 9 be clamp nut, 10 be sliding sleeve, 10-1 be tongue, the holes of 10-2 second.
【Embodiment】
The utility model is described in further detail below in conjunction with the accompanying drawings：
As shown in Figure 1 to Figure 3, torque coefficient of bolt test device of the present utility model, including fixture 2, pressure rings 3, torsion
Square spanner 5 and resistance strain gauge 7, pressure rings 3 are set on the screw rod of bolt 8 to be measured, and bolt 8 to be measured is in the both sides of pressure rings 3
Be arranged with respectively the first pad 8-1 and the second pad 8-2, the first pad 8-1 and the second pad 8-2 surface be provided with it is anti-skidding
Structure, clamp nut 9, pressure rings 3, clamp nut 9, the first pad 8-1, second are threaded with the screw rod of bolt 8 to be measured
Pad 8-2 is an entirety with bolt 8 to be measured fastening；Pressure rings 3 are connected with resistance strain gauge 7 by connecting line 6；Fixture 2 can
Dismounting is fixedly installed on pedestal 1, and for clamping clamp nut 9, fixture 2 includes left fixture 2-3 and right fixture 2-2, left fixture
2-3 and right fixture 2-2 offers the groove 2-1 for clamping fastener nut 9 in their intersection, and groove 2-1 is V-arrangement
Groove；The sleeve 4 being adapted to the head of bolt 8 to be measured is connected with torque wrench 5, sleeve 4 is set in the head of bolt 8 to be measured.
With reference to Fig. 3-Fig. 5, sliding sleeve 10, sliding sleeve are also arranged with the screw rod of bolt 8 to be measured of the present utility model
Coordinate between 10 and the screw rod of bolt to be measured 8 for gap, pressure rings 3 are sheathed on the outer ring of sliding sleeve 10, and pressure rings 3 are with sliding
Coordinate between sleeve 10 for gap, the length of sliding sleeve 10 is less than the length of pressure rings 3；
As shown in Figure 4 and Figure 5, the first hole 3-2 is opened up at the center of pressure rings 3, the first hole 3-2 surface is vertically
Two symmetrical chute 3-1 are offered, the second hole 10-2, outer surface and chute 3-1 are offered at the center of sliding sleeve 10
Corresponding position is provided with two symmetrical tongue 10-1 being adapted with chute 3-1；Upper surfaces of the chute 3-1 along pressure rings 3
Open up downwards (such as Fig. 4), and length is less than the thickness of pressure rings 3；Upper surfaces of the tongue 10-1 along sliding sleeve 10 it is spontaneous and under
Set (such as Fig. 5), tongue 10-1 length is less than chute 3-1 length, and sliding sleeve 10 and pressure rings 3 pass through the first hole 3-
2 and tongue 10-1, which enters line slip, to be fixed.
First pad 8-1 and bolt to be measured 8 of the present utility model belong to same batch, the first pad 8-1 and the second pad
8-2 surface is provided with anti-skid structure, it is therefore an objective to increases the contact surface between the second pad 8-2 and fixture 2 and pressure rings
The frictional force of the contact surface between contact surface and the first pad 8-1 and pressure rings 3 between 3, bolt 8 is prevented to be threaded through applying
Occurs the accuracy skidded and influence data in journey.
When testing the torque coefficient of bolt to be measured by torque coefficient of bolt test device of the present utility model, by as follows
Step is carried out：
Step 1, bolt 8 to be measured is penetrated in the endoporus of sliding sleeve 10, then pressure rings 3 are enclosed on sliding sleeve 10
Outer ring, then the first pad 8-1 is placed on the upper end of pressure rings 3 and sliding sleeve 10, the second pad 8-2 is placed on pressure rings
3 and the lower end of sliding sleeve 10, clamp nut 9 is connected with the screw rod of bolt 8 to be measured, clamp nut 9 is tightened, makes bolt to be measured
8th, sliding sleeve 10, pressure rings 3, the first pad 8-1, the second pad 8-2 and clamp nut 9 are connected as an entirety, and conduct
Bolt connection pair to be measured, pressure rings 3 are connected with resistance strain gauge 7, and the registration of adjustment resistance strain gauge 7 is zeroed；
Step 2, compressive load is applied to the bolt connection pair to be measured of step 1 by universal testing machine, to bolt 8 to be measured
Pretightning force and strain demarcated, obtain both linear relationships；
Step 3, clamp nut 9 is clamped by the groove 2-1 of fixture 2, and fixture 2 is fixed on to the base of universal testing machine
On seat 1, operation universal testing machine makes the groove 2-1 of fixture 2 clamp clamp nut 9, it should be noted that in operation universal test
The fixture of machine should avoid clamping the second pad, it is ensured that the second pad position when clamping the clamp nut of bolt connection pair to be measured
In the upper surface of fixture；Then, according to the suitable sleeve 4 of size selection on the head of bolt 8 to be measured, by the hexagonal of the lower end of sleeve 4
The head of connected in star and bolt 8 to be measured is closely coupled, and the upper end of sleeve 4 is connected with torque wrench 5；
Step 4, when needing test, the moment of torsion drafted balancedly steadily is applied to torque wrench 5 first, due to one
In the presence of determining moment of torsion, pretightning force is generated at the screw rod of bolt to be measured, pretightning force is measured by pressure rings 3 and will measurement
Signal is changed to resistance strain gauge 7, when be applied to draft moment of torsion when, torque wrench 5 sounds the alarm, now in resistance strain gauge
Strain registration is read on 7 display.
The pretightning force of bolt to be measured is demarcated by step 2 and the linear relationship of strain calculates pretightning force P, due to what is drafted
Moment of torsion, it is known that according to《Code for acceptance of construction quality of steel structures》Formula k=T/ (DP) as defined in (GB50205-2001)
Go out torque coefficient, take eight sets of bolts as a test sample and the arithmetic mean of instantaneous value and standard deviation of calculated torque coefficient.To say
The test effect of the bright present apparatus, choose battery of tests data instance and illustrate.
Bolt specification is M20, and grade is 8.8 grades of plain bolts, and anti-corrosion measure is divided into ungalvanized (being commonly called as black part) and hot dipping
Zinc-plated (being commonly called as white part), the linear formula of pretightning force-strain according to obtained by second step rating test are：Pretightning force=0.1352
× strain -2.017, is calculated, pretightning force=0.1352 × 687-2.017 by taking the strain 687 measured by black part sequence number 1 as an example
=90.87kN, single set torque coefficient of bolt is obtained according to formula k=280/ (20 × 90.87)=0.154, calculated successively
Obtain the average value and standard deviation of torque coefficient.As shown in table 1, table 1 is torque coefficient test result：
Table 1
It can be drawn by the result of table 1 to draw a conclusion：
(1) for the bolt of same levels and specification, the torque coefficient and torque coefficient of galvanizing by dipping bolt (after zinc-plated)
Standard deviation (discreteness) will be higher than black part (before zinc-plated)；
(2)GB/T1231-2006《High-strength large hexagon head bolt used for steel structure, heavy series hexagon nut, gasket techniques condition》
The torque coefficient average value for defining high-strength bolt is 0.110~0.150, and torque coefficient standard deviation not should be greater than 0.010.Compare
In high-strength bolt, the torque coefficient average value and standard deviation (discreteness) of plain bolt are all higher than the high-strength bolt of specification defined
Torque coefficient average value and standard deviation (discreteness).
Claims (9)
- A kind of 1. torque coefficient of bolt test device, it is characterised in that including fixture (2), pressure rings (3), torque wrench (5) and Resistance strain gauge (7), pressure rings (3) are set on the screw rod of bolt to be measured (8), are threadedly coupled on the screw rod of bolt (8) to be measured There is clamp nut (9), pressure rings (3), clamp nut (9) and bolt to be measured (8) fastening are an entirety；Pressure rings (3) and electricity Hinder deformeter (7) connection；Fixture (2) is fixedly installed and for clamping clamp nut (9)；Torque wrench is connected with and treated on (5) The sleeve (4) of the head adaptation of bolt (8) is surveyed, sleeve (4) is set in the head of bolt to be measured (8).
- A kind of 2. torque coefficient of bolt test device according to claim 1, it is characterised in that the bolt (8) to be measured The first pad (8-1) and the second pad (8-2) are arranged with respectively in the both sides of pressure rings (3).
- A kind of 3. torque coefficient of bolt test device according to claim 2, it is characterised in that the first pad (8- 1) surface with the second pad (8-2) is provided with anti-skid structure.
- A kind of 4. torque coefficient of bolt test device according to claim 1, it is characterised in that the bolt (8) to be measured Screw rod on be also arranged with sliding sleeve (10), between sliding sleeve (10) and the screw rod of bolt to be measured (8) for gap coordinate, pressure Power ring (3) is sheathed on the outer ring of sliding sleeve (10), coordinates between pressure rings (3) and sliding sleeve (10) for gap, slip cap The length of cylinder (10) is less than the thickness of pressure rings (3).
- A kind of 5. torque coefficient of bolt test device according to claim 4, it is characterised in that the interior table of pressure rings (3) Face offers chute (3-1) vertically, and the outer surface of sliding sleeve (10) position corresponding with chute (3-1) is provided with and chute The tongue (10-1) that (3-1) is adapted.
- 6. a kind of torque coefficient of bolt test device according to claim 5, it is characterised in that chute (3-1) is along pressure The upper table of ring (3) opens up downwards, and length is less than the thickness of pressure rings (3)；Tongue (10-1) is upper along sliding sleeve (10) Surface is set from top to bottom, and the length of tongue (10-1) is less than the length of chute (3-1).
- 7. a kind of torque coefficient of bolt test device according to claim 1, it is characterised in that the fixture (2) includes Left fixture (2-3) and right fixture (2-2), left fixture (2-3) and right fixture (2-2) are offered for pressing from both sides in their intersection Hold the groove (2-1) of clamp nut (9).
- 8. a kind of torque coefficient of bolt test device according to claim 7, it is characterised in that the groove (2-1) is V Shape groove.
- 9. a kind of torque coefficient of bolt test device according to claim 1, it is characterised in that the fixture (2) is fixed It is arranged on pedestal (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720900318.4U CN207007399U (en) | 2017-07-24 | 2017-07-24 | A kind of torque coefficient of bolt test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720900318.4U CN207007399U (en) | 2017-07-24 | 2017-07-24 | A kind of torque coefficient of bolt test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207007399U true CN207007399U (en) | 2018-02-13 |
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ID=61455859
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720900318.4U Expired - Fee Related CN207007399U (en) | 2017-07-24 | 2017-07-24 | A kind of torque coefficient of bolt test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207007399U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107238460A (en) * | 2017-07-24 | 2017-10-10 | 西安建筑科技大学 | A kind of torque coefficient of bolt test device and method |
| CN108469327A (en) * | 2018-03-14 | 2018-08-31 | 河海大学常州校区 | A kind of torsion-testing apparatus of pile welding joint |
| CN111220371A (en) * | 2020-03-08 | 2020-06-02 | 哈尔滨理工大学 | Device for measuring maximum torque borne by vertical orthodontic anchorage nail and using method |
-
2017
- 2017-07-24 CN CN201720900318.4U patent/CN207007399U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107238460A (en) * | 2017-07-24 | 2017-10-10 | 西安建筑科技大学 | A kind of torque coefficient of bolt test device and method |
| CN108469327A (en) * | 2018-03-14 | 2018-08-31 | 河海大学常州校区 | A kind of torsion-testing apparatus of pile welding joint |
| CN111220371A (en) * | 2020-03-08 | 2020-06-02 | 哈尔滨理工大学 | Device for measuring maximum torque borne by vertical orthodontic anchorage nail and using method |
| CN111220371B (en) * | 2020-03-08 | 2021-07-09 | 哈尔滨理工大学 | Device for measuring maximum bearing torque of vertical orthodontic anchorage nail and using method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190517 Address after: Room 117, Building Materials Building No. 13 Yanta Road, Beilin District, Xi'an City, Shaanxi Province Patentee after: Xi'an Construction Technology University Engineering Co., Ltd. Address before: 710055 Yanta Road 13, Xi'an City, Shaanxi Province Patentee before: Xi'an Architectural Sci & Tech. Univ. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180213 Termination date: 20200724 |
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| CF01 | Termination of patent right due to non-payment of annual fee |