CN205607325U - Tie up rope formula extensometer based on compliance control - Google Patents
Tie up rope formula extensometer based on compliance control Download PDFInfo
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- CN205607325U CN205607325U CN201620346855.4U CN201620346855U CN205607325U CN 205607325 U CN205607325 U CN 205607325U CN 201620346855 U CN201620346855 U CN 201620346855U CN 205607325 U CN205607325 U CN 205607325U
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- tied rope
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- extending
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Abstract
The utility model discloses a tie up rope formula extensometer based on compliance control, this extensometer includes: remove the screw rod, tie up rope peg, fix the body, including the first fixed body and the fixed body of second, the first fixed body and second set up a mobile rail and the 2nd mobile rail respectively on fixing the body, tie up rope peg and move along a mobile rail and the 2nd mobile rail, and rope peg is tied up at fixed body internal connection to the removal screw rod, tie up the rope, connect and tie up rope peg and material sample, the dynamometer is connected and is tied up the rope, the pole of extending, one end is fixed to be set up on the fixed body, and the other end is the butt sample respectively, the sensor sets up in the middle of the fixed body, and connects the pole of extending. The utility model provides a tie up rope formula extensometer can the accurate positioning sample the mounted position of tying up the rope during test, prevent to tie up the rope excessively the pine lead to the extensometer to skid, the pole of perhaps extending installation tension leads to extending the pole and tightens the fracture.
Description
Technical field
This utility model relates to material tests instrument field, particularly relates to a kind of tied rope formula extensometer based on strain controlling.
Background technology
Aero-Space high-temperature material, owing to being on active service in high temperature environments, need to carry out military service performance dependence test and appraisal, including the high temperature low-cycle fatigue performance of test material.High temperature low-cycle fatigue test typically uses strain controlling, and the measurement of material strain is drawn by extensometer test.Extensometer two is extended the masthead gauge length section at sample, opens with the micro-strain of sample or close in process of the test, but 2 of push rod and sample contacts remain geo-stationary, thus measures the axial strain of point-to-point transmission, it is achieved strain controlling fatigue test.
The type of existing extensometer mainly includes rocker-arm extensometer and tied rope formula extensometer, this two classes extensometer in installation process, installed pine be then susceptible in process of the test extensometer skid cause the failure of an experiment；And owing to sample at high temperature extends, diameter occurs certain reducing, at room temperature installing good situation is the most still susceptible to skidding originally.On the one hand and extensometer is installed tension and can be damaged fatigue testing specimen surface, cause reduces fatigue life, on the one hand as bar of extending is the most tight and fracture causes test failure.And after installing extensometer, it is impossible to rational judgment installs quality, can only repeatedly be groped by experiment operator, accumulate working experience, be mounted to power low, and the working cycle is long, and cannot quantify and standardization.Meanwhile, use what slack adjuster regulated every ceramic bar and sample to contact elasticity, only with feel, it is impossible to quantitative, cause debugging cycle length and higher success rate cannot be ensured.
Utility model content
This utility model is mainly solving the technical problems that provide a kind of tied rope formula extensometer based on strain controlling, the installation site of tied rope when can be accurately positioned sample testing, prevent tied rope pine excessively from causing extensometer to skid, or bar of extending is installed the tension bar that causes extending and tightened fracture.
For solving above-mentioned technical problem, the technical scheme that this utility model uses is: providing a kind of tied rope formula extensometer based on strain controlling, this extensometer includes: mobile screw, including the first mobile screw and the second mobile screw；Tied rope clothes-hook, including the first tied rope clothes-hook and the second tied rope clothes-hook, the first tied rope clothes-hook connects the first mobile screw, and the second tied rope clothes-hook connects the second mobile screw；Fixed body, including the first fixed body and the second fixed body, first fixed body and the second fixed body connect the first mobile screw and the second mobile screw respectively, wherein, the first moving guide rail and the second moving guide rail it is respectively provided with on first fixed body and the second fixed body, first tied rope clothes-hook and the second tied rope clothes-hook are respectively arranged in the first moving guide rail and the second moving guide rail, and move along the first moving guide rail and the second moving guide rail, and mobile screw connects tied rope clothes-hook inside fixed body；Tied rope, including the first tied rope and the second tied rope, the first tied rope is connected to the first tied rope clothes-hook and material sample, and the second tied rope is connected to the second tied rope clothes-hook and material sample；Ergometer, connects the first tied rope and the second tied rope respectively including the first ergometer and the second ergometer, the first ergometer and the second ergometer；Extending bar, extend bar including the first bar and second of extending, first bar and second bar one end of extending of extending is fixedly installed on the first fixed body and the second fixed body respectively, and the other end abuts sample respectively；Sensor, is arranged between the first fixed body and the second fixed body, and connects the first bar and second of extending and extend bar.
Wherein, also including thermal baffle, thermal baffle connects the first fixed body and the second fixed body, the direction of the bar that is disposed in proximity to extend, and the first bar and second of extending extends bar through thermal baffle.
Wherein, bar of extending is that pottery is extended bar.
Wherein, fixed body is provided for fixing the first tied rope clothes-hook and the fixing lock of the second tied rope clothes-hook position.
Wherein, tied rope is circulus, and one end is placed on sample, and the other end is placed on tied rope clothes-hook.
It is different from prior art, tied rope formula extensometer of the present utility model controls the position of tied rope clothes-hook to control the elasticity of tied rope by mobile screw, make both sides tied rope tension force suitable by ergometer, thus the conflict pressure of the pole pair sample that accurately controls to extend is in OK range.Pass through this utility model, it is possible to the installation site of tied rope when being accurately positioned sample testing, prevent tied rope pine excessively from causing extensometer to skid, or bar of extending is installed the tension bar that causes extending and tightened fracture.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of based on strain controlling the tied rope formula extensometer that this utility model provides；
Fig. 2 is the schematic diagram in kind of a kind of based on strain controlling the tied rope formula extensometer that this utility model provides.
Detailed description of the invention
Make to describe in more detail further to the technical solution of the utility model below in conjunction with detailed description of the invention.Obviously, described embodiment is only a part of embodiment of the present utility model rather than whole embodiments.Based on the embodiment in this utility model, the every other embodiment that those of ordinary skill in the art are obtained on the premise of not making creative work, all should belong to the scope of this utility model protection.
Generally extensometer is when testing sample, extensometer two is extended the masthead gauge length section at sample, process of the test is opened with the micro-strain of sample or closes, 2 of push rod and sample contacts remain geo-stationary, thus measure the axial strain of point-to-point transmission, it is achieved strain controlling fatigue test.The main body of extensometer typically uses resistance-type or capacitance type sensor, the operating temperature of extensometer sensor side the most not can exceed that 75 DEG C, but fatique testing at elevated temperature in-furnace temperature is typically at 500 DEG C of even more high-temperatures, the heat that firehole gives off easily makes extensometer sensor temperature beyond SC service ceiling, therefore, for reducing sensor temperature, the bar of extending of high-temperature extensometer the most all uses lengthening ceramic bar.Ceramic bar uses cantilever beam structure form to contact with sample.Lengthening ceramic bar has certain weight, the extensometer that therefore cantilever beam is fixing to there is leverage.Specimen surface roughness is required the highest by fatigue test, it is desirable to specimen surface is smooth and zero defect.Owing to sample is by axial test force, therefore can not there is the ceramic bar of the fixing extensometers such as notch, otherwise can affect fatigue life, cause test failure.During clamping extensometer, require ceramic bar to hold out against when masthead end of extending contacts with specimen surface but specimen surface can not be destroyed.And during actual tests, masthead of extending be easy on sample skid, it is difficult to ensure that on sample two contacts with two extend masthead end keep geo-stationary.
The preparation of fatique testing at elevated temperature sample requires higher, and the process of the test cycle is long, and extensometer itself is the most much more expensive, if skidding occurs in Shi Yan, will cause test failure because of skidding, fracture during even skidding bar of extending, and can cause a large amount of losses of time and fund.
It is the structural representation of a kind of based on strain controlling the tied rope formula extensometer that this utility model provides refering to Fig. 1, Fig. 1.
Tied rope formula extensometer 100 includes: mobile screw 110, tied rope clothes-hook 120, fixed body 130, tied rope 140, ergometer 150, extend bar 160 and sensor 170.Wherein, fixed body 130 includes the first fixed body 131 and the second fixed body 132, and the first fixed body 131 and the second fixed body 132 are hollow structure, and a side surface is respectively provided with the first moving guide rail 1311 and the second moving guide rail 1321.Mobile screw 110 includes the first mobile screw 111 and the second mobile screw 112, first mobile screw 111 and the second mobile screw 112 are connected with the first fixed body 131 and the second fixed body 132 respectively in the way of being spirally connected respectively, and by screw thread precession or back-out in the first fixed body 131 and the second fixed body 132.Tied rope clothes-hook 120 includes that the first tied rope clothes-hook 121 and the second tied rope clothes-hook 122, the first tied rope clothes-hook 121 and the second tied rope clothes-hook 122 connect the first mobile screw 111 and the second mobile screw 112 respectively.First tied rope clothes-hook 121 and the first mobile screw 111 and the second tied rope clothes-hook 122 and the second mobile screw 112 are " 7 " character form structure, tied rope clothes-hook 120 stretches out from the moving guide rail of fixed body 130, and the moving guide rail along fixed body 130 moves with precession or the back-out of mobile screw 110, the direction of movement is consistent with the direction of mobile screw 110 precession or back-out.When the position of tied rope clothes-hook 120 determines, the screw-threaded coupling on mobile screw 110 and fixed body 130, the position of tied rope clothes-hook 120 is fixed.Meanwhile, the first fixed body 131 and the second fixed body 132 are respectively provided with fixing lock 133, when the position of tied rope clothes-hook 120 determines, lock further, prevent mobile.
Tied rope 140 includes the first tied rope 141 and the second tied rope 142.One end of first tied rope 141 and the second tied rope 142 is respectively fixedly connected with the first tied rope clothes-hook 121 and the second tied rope clothes-hook 122, and the other end is fixedly connected with on sample 101.In the present embodiment, tied rope 140 is ring-type rope, and one end is placed on the first tied rope clothes-hook 121 and the second tied rope clothes-hook 122, and the other end is nested with on sample 101.Ergometer 150 includes that the first ergometer 151 and the second ergometer 152, the first ergometer 151 and the second ergometer 152 are arranged at the first tied rope 141 and middle part of the second tied rope 142, can record the tension force in tied rope 140.Bar 160 of extending includes that the first bar 162 and second of extending is extended bar 162, first bar 161 of extending is arranged at position relative with the first mobile screw 111 on the first fixed body 131, and the second bar 162 of extending is arranged at position relative with the second mobile screw 112 on the second fixed body 132.Bar 160 of extending is extended bar for pottery.Sensor 170 is arranged between the first fixed body 131 and the second fixed body 132, and is connected to bar 160 of extending.In other embodiments, bar 160 of extending is set directly on sensor 170.
When extensometer 100 carries out strain testing, bar 161 and second of extending first bar 162 of extending installs in sample 101 surface intimate contact therewith, first tied rope 141 and the second tied rope 142 are placed on sample 101, the position of tied rope clothes-hook 120 is regulated by mobile screw 110, to regulate the elasticity of tied rope 150, the display numerical value making the first ergometer 151 and the second ergometer 152 is close the most equal, so that the first tied rope 141 and the second tied rope 142 stress equalization.Extended the contact pressure between bar 160 and sample 101 by acquisition, process of the test requires quantitative test, it is thus achieved that the reasonably bar clamping power of extending of extensometer 100.Realize, by mobile screw 110, bar 160 of extending tied rope 150 Tensity size is continuously adjusted, thus the continuously adjusting of realize extending bar 160 and sample 101 contact force size.Determined the Tensity size of the tied rope 150 of extensometer 100 by reasonable experimental implementation, on the one hand can avoid that pine was installed and cause extensometer to skid, be on the other hand possible to prevent that tension is installed and cause damage fatigue testing specimen surface and bar 160 of extending excessively to tighten and rupture.When experimental condition, sample type change, extensometer tied rope tension force can be adjusted simply and effectively, it is achieved bar of extending rationally contacts with specimen surface, it is achieved strain controlling.
Further, including thermal baffle 180, thermal baffle 180 connects the first fixed body 131 and the second fixed body 132, the direction of the bar 160 that is disposed in proximity to extend, and the first bar 161 and second of extending extends bar 162 through thermal baffle 180.When sample 101 being carried out high-temp strain test, the operating temperature of extensometer sensor 170 the most not can exceed that 75 DEG C, but sample 101 test temperature is typically more than 500 DEG C, therefore for ensureing the normal work of sensor 170, in addition to above-mentioned bar 160 of extending being carried out lengthening and arranges, also at sensor 170, thermal baffle 180 is set near the side of sample 101, by the obstruct of thermal baffle 180 and extend the distance between sensor 170 and sample 101 by bar 160 of extending, make sensor 170 be in normal operating temperature.
It is different from prior art, tied rope formula extensometer of the present utility model controls the position of tied rope clothes-hook to control the elasticity of tied rope by mobile screw, make both sides tied rope tension force suitable by ergometer, thus the conflict pressure of the pole pair sample that accurately controls to extend is in OK range.Pass through this utility model, it is possible to the installation site of tied rope when being accurately positioned sample testing, prevent tied rope pine excessively from causing extensometer to skid, or bar of extending is installed the tension bar that causes extending and tightened fracture.
The foregoing is only embodiment of the present utility model; not thereby the scope of the claims of the present utility model is limited; every equivalent structure utilizing this utility model description and accompanying drawing content to be made or equivalence flow process conversion; or directly or indirectly it is used in other relevant technical fields, the most in like manner it is included in scope of patent protection of the present utility model.
Claims (5)
1. a tied rope formula extensometer based on strain controlling, it is characterised in that including:
Mobile screw, including the first mobile screw and the second mobile screw；
Tied rope clothes-hook, including the first tied rope clothes-hook and the second tied rope clothes-hook, described first tied rope clothes-hook connects described first mobile screw, and described second tied rope clothes-hook connects described second mobile screw；
Fixed body, including the first fixed body and the second fixed body, described first fixed body and the second fixed body connect described first mobile screw and the second mobile screw respectively, wherein, the first moving guide rail and the second moving guide rail it is respectively provided with on described first fixed body and the second fixed body, described first tied rope clothes-hook and the second tied rope clothes-hook are respectively arranged in described first moving guide rail and the second moving guide rail, and move along described first moving guide rail and the second moving guide rail, described mobile screw connects described tied rope clothes-hook inside described fixed body；
Tied rope, including the first tied rope and the second tied rope, described first tied rope is connected to described first tied rope clothes-hook and material sample, and described second tied rope is connected to described second tied rope clothes-hook and described material sample；
Ergometer, including the first ergometer and the second ergometer, described first ergometer and the second ergometer connect described first tied rope and the second tied rope respectively；
Extending bar, extend bar including the first bar and second of extending, described first bar and second bar one end of extending of extending is fixedly installed on described first fixed body and the second fixed body respectively, and the other end abuts described sample respectively；
Sensor, is arranged between described first fixed body and the second fixed body, and connects the described first bar and described second of extending and extend bar.
Tied rope formula extensometer the most according to claim 1, it is characterized in that, also including thermal baffle, described thermal baffle connects described first fixed body and described second fixed body, extending described in being disposed in proximity to the direction of bar, the described first bar and second of extending extends bar through described thermal baffle.
Tied rope formula extensometer the most according to claim 1, it is characterised in that described in bar of extending be that pottery is extended bar.
Tied rope formula extensometer the most according to claim 1, it is characterised in that be provided for fixing described first tied rope clothes-hook and the fixing lock of the second tied rope clothes-hook position on described fixed body.
Tied rope formula extensometer the most according to claim 1, it is characterised in that described tied rope is circulus, one end is placed on described sample, and the other end is placed on described tied rope clothes-hook.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620346855.4U CN205607325U (en) | 2016-04-22 | 2016-04-22 | Tie up rope formula extensometer based on compliance control |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620346855.4U CN205607325U (en) | 2016-04-22 | 2016-04-22 | Tie up rope formula extensometer based on compliance control |
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| CN205607325U true CN205607325U (en) | 2016-09-28 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108020466A (en) * | 2017-12-21 | 2018-05-11 | 吉林大学 | For the split type miniature extensometer of small-sized original position stretching instrument stretcher strain measurement |
| CN112050775A (en) * | 2020-09-10 | 2020-12-08 | 燕山大学 | Deformation measuring device and method for large-scale component in closed heating furnace |
-
2016
- 2016-04-22 CN CN201620346855.4U patent/CN205607325U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108020466A (en) * | 2017-12-21 | 2018-05-11 | 吉林大学 | For the split type miniature extensometer of small-sized original position stretching instrument stretcher strain measurement |
| CN108020466B (en) * | 2017-12-21 | 2024-02-02 | 吉林大学 | Split type miniature extensometer for measuring stretching deformation of small-sized in-situ stretching instrument |
| CN112050775A (en) * | 2020-09-10 | 2020-12-08 | 燕山大学 | Deformation measuring device and method for large-scale component in closed heating furnace |
| CN112050775B (en) * | 2020-09-10 | 2021-09-03 | 燕山大学 | Deformation measuring device and method for large-scale component in closed heating furnace |
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