CN1281937C - Fixture and method for micro motion experiment - Google Patents
Fixture and method for micro motion experiment Download PDFInfo
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- CN1281937C CN1281937C CN 01108525 CN01108525A CN1281937C CN 1281937 C CN1281937 C CN 1281937C CN 01108525 CN01108525 CN 01108525 CN 01108525 A CN01108525 A CN 01108525A CN 1281937 C CN1281937 C CN 1281937C
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- 238000000034 method Methods 0.000 title abstract description 5
- 238000002474 experimental method Methods 0.000 title description 2
- 238000012360 testing method Methods 0.000 claims abstract description 118
- 238000006073 displacement reaction Methods 0.000 claims abstract description 37
- 238000005259 measurement Methods 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 abstract description 9
- 238000010998 test method Methods 0.000 abstract description 7
- 238000001514 detection method Methods 0.000 abstract description 3
- 238000012545 processing Methods 0.000 abstract description 3
- 239000011248 coating agent Substances 0.000 description 9
- 238000000576 coating method Methods 0.000 description 9
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 5
- 230000009977 dual effect Effects 0.000 description 4
- 230000036316 preload Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000007733 ion plating Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
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Abstract
本发明提供了一种径向微动试验夹具及其试验方法，采取控制载荷和控制变形量两种方式，产生了一种新的材料摩擦性能的检测方法。接触偶件(上、下试件)采用球/平面接触方式，其中上试件固定，下试件随高精度液压侍服系统驱动的活塞而运动。载荷信号由上试件上方的载荷传感器测量，试件间的相对变形大小由高精度的外置位移传感器测量；然后将载荷传感器和外置位移传感器的测量信号输入计算机处理。主要用于径向微动试验。
The invention provides a radial fretting test fixture and a test method thereof, adopting two methods of controlling load and controlling deformation, and producing a new detection method for material friction performance. The contact pair (upper and lower test pieces) adopts the ball/plane contact method, in which the upper test piece is fixed, and the lower test piece moves with the piston driven by the high-precision hydraulic servo system. The load signal is measured by the load sensor above the upper test piece, and the relative deformation between the test pieces is measured by a high-precision external displacement sensor; then the measurement signals of the load sensor and the external displacement sensor are input into the computer for processing. Mainly used for radial fretting test.
Description
Affiliated technical field
The present invention relates to material friction polishing machine and coating life evaluation test technical field.
Background technology
Be different from slip, roll, fine motion is the relative motion of the amplitude that takes place between interference fit minimum (usually in micron dimension).Fine motion can cause the surface in contact wearing and tearing, causes the member interlock, becomes flexible or form pollution source etc.; It also can quicken the germinating and the expansion of crackle, and reduced the fatigue lifetime of parts.Fine motion has become the one of the main reasons of wringing fit component failure in industry such as nuclear power, aviation, railway.The mode of motion of fine motion is very complicated, and the mode of motion of fine motion can be divided into four kinds of fundamental types such as parallel-moving type, radial, tumbling-type and twisting type.Radially fine motion is normally produced by the cyclical variation of normal force or thermal stress, and the contact radius of a circle is along with the fluctuation of normal force or thermal stress changes between minimum and maximum value, and slippage occurs in the annulus between the minimum and maximum contact radius.Radially two of fine motion surface in contacts remain contact condition, if in a single day surface in contact breaks away from each other, its motor pattern will change impact into.
Summary of the invention
The purpose of this invention is to provide a kind of fine motion test fixture and test method thereof: it can simulate radially fretting wear and the contact fatigue life assessment of coating under radially fine motion condition effectively.
The present invention is by the servo fine motion testing table of French NENE2 type high-precision hydraulic control program being improved, take control load and controlled deformation amount dual mode, having produced a kind of new material friction performance detection method.It is a kind of simple to operate, can simulate the test method of radially fine motion truly.Contact even part (upper and lower test specimen) and adopt ball/plane contact mode, wherein go up test specimen and fix, the piston that following test specimen is waitd upon the dress system driving with high-precision hydraulic moves.Load signal is measured by the load transducer of last test specimen top, and the relative deformation size between test specimen is by high-precision external displacement sensor; Then the measuring-signal of load transducer and external displacement transducer is imported Computer Processing.Finish above-mentioned task need comprise hydraulic test bench on, following mount pad and anchor clamps thereof, anchor clamps by one with the last mount pad of hydraulic test bench by threaded connection last test specimen chuck and one form by the following test specimen chuck of threaded connection with following mount pad, following mount pad is a threaded piston head, piston is done radial motion during test, load transducer is located at the last mount pad top of hydraulic test bench, last mount pad is a threaded bar, on, following test specimen chuck all has a screw with described threaded engagement, the test specimen chuck is installed in respectively on mount pad and the following mount pad by screw, last test specimen chuck is provided with boss along the screw axis direction, following test specimen chuck is provided with groove along the screw axis direction, is provided with displacement transducer along a side of anchor clamps screw radial line direction.The described boss of going up the test specimen chuck is provided with test specimen, is provided with down test specimen in the groove of described test specimen chuck down.Last test specimen is the plane with following test specimen contact position, and following test specimen and last test specimen contact position are sphere.The load range of this test unit is between 0～1000N; Displacement measurement precision 0.2 μ m, external displacement transducer maximum range 60 μ m; Hydraulic pressure is waitd upon dress system control displacement variation range 1～12000 μ m.This test unit can be tested under control load and controlled deformation amount dual mode respectively.The radially fine motion test procedure of control load is as follows:
1. at first confirmed test parameter;
2. add preload (as 10N), carry out the data zero clearing again, to guarantee that contact is good between the surface of friction pair;
3. be loaded into maximum load p with certain loading velocity
Max, be loaded on minimum load p with identical velocity reversal again
Min, p
MinValue should could guarantee that like this surface in contact does not break away from greater than 0.It more than is the loaded cycle first time;
4. after finishing circulation for the first time, sample shuttling movement between minimum and maximum load under the loading velocity control of setting.Computing machine can write down and export required arbitrary radially fine motion round-robin load-deformation displacement curve, and record and output maximum, least displacement and displacement amplitude are with the change curve of cycle index.Speed of related movement is controlled by adding sanction speed between the friction pair of this test, and the loading velocity scope is-6000～6000 μ m/min.
The radially fine motion test of controlled deformation is to realize that by the relative displacement between the even part of control contact its step is as follows:
1. at first confirmed test parameter.
2. apply suitable preload (10N) to guarantee that contact is good between even part.
3. do not disengage between the surface of friction pair for guaranteeing, apply an initial load p with certain loading velocity
0
4. the motion of the deformation displacement amplitude Δ D control piston of She Dinging makes the constant deformation displacement of maintenance between friction pair.
Each circulation is finished and is once loaded and unload.Computing machine can write down and export arbitrary radially fine motion round-robin load-deformation displacement-cycle index three-dimensional plot; And write down minimum and maximum load and load amplitude change curve with cycle index.Control speed of related movement between friction pair by the motion frequency (f) of control piston, frequency range is 0.1～800.0Hz.As required, the entire test of 2 kinds of patterns can be controlled at elastic range or elastic-plastic range, key depends on the added value of cyclic loading the 1st time.In the experimental study of radially fine motion, can select motor pattern according to the stressing conditions of the even part of study.If the load change amplitude is constant, then should carry out the test of control load pattern; If the moving displacement amplitude of even part is constant, then should carry out the test of controlled deformation pattern; If outer carrying with relative displacement all changes, then can under 2 kinds of patterns, test respectively.
Description of drawings
Fig. 1 is a process of the test structural representation of the present invention
Fig. 2 is experiment process figure of the present invention
Fig. 3 is the reappearance of control load same sample test findings of the present invention
Fig. 4 is the reappearance of controlled deformation same sample test findings of the present invention
Fig. 5 is a same material different tests parameter result's of the present invention comparability
Fig. 6 is a different materials identical test parameter result's of the present invention comparability
Embodiment
The invention will be further described below in conjunction with accompanying drawing
The present invention is by the servo fine motion testing table of French NENE2 type high-precision hydraulic control program being improved, take control load and controlled deformation amount dual mode, having produced a kind of new material friction performance detection method.It is a kind of simple to operate, can simulate the test method of radially fine motion truly.Contact even part (upper and lower test specimen) and adopt ball/plane contact mode, it is fixing wherein to go up test specimen 3, and the piston 6 that following test specimen 4 is waitd upon the dress system driving with high-precision hydraulic moves.Load signal is measured by the load transducer 1 of last test specimen 3 tops, and the relative deformation size between test specimen is measured by high-precision external displacement transducer 7; Then the measuring-signal of load transducer 1 and external displacement transducer 7 is imported Computer Processing.Finish above-mentioned task need comprise hydraulic test bench on, following mount pad and anchor clamps thereof, anchor clamps by one with the last mount pad of hydraulic test bench by threaded connection last test specimen chuck 2 and one form by the following test specimen chuck 5 of threaded connection with following mount pad, following mount pad is a threaded piston head, piston 6 is done radial motion during test, load transducer 1 is located at the last mount pad top of hydraulic test bench, last mount pad is a threaded bar, last test specimen chuck 2, following test specimen chuck 5 all has a screw with described threaded engagement, the test specimen chuck is installed in respectively on mount pad and the following mount pad by screw, last test specimen chuck 2 is provided with boss along the screw axis direction, following test specimen chuck 5 is provided with groove along the screw axis direction, is provided with displacement transducer 7 along a side of anchor clamps screw radial line direction.The described boss of going up test specimen chuck 2 is provided with test specimen 3, is provided with down test specimen 4 in the groove of described test specimen chuck 5 down.Last test specimen 3 is the plane with following test specimen 4 contact positions, and following test specimen 4 is a sphere with last test specimen 3 contact positions.The load range of this test unit is between 0～1000N; Displacement measurement precision 0.2 μ m, external displacement transducer 7 maximum ranges 60 μ m; Hydraulic pressure is waitd upon dress system control displacement variation range 1～12000 μ m.This test unit can be tested under control load and controlled deformation amount dual mode respectively.The radially fine motion test procedure of control load is as follows:
1. at first confirmed test parameter.
2. add preload (as 10N) to friction pair, carry out the data zero clearing again, to guarantee that contact is good between the surface of friction pair;
3. be loaded into maximum load p with certain loading velocity
Max, be loaded on minimum load P with identical velocity reversal again
Min, p
MinValue should could guarantee that like this surface in contact does not break away from greater than 0.It more than is the loaded cycle first time.
4. after finishing circulation for the first time, sample shuttling movement between minimum and maximum load under the loading velocity control of setting.Computing machine can write down and export required arbitrary radially fine motion round-robin load-deformation displacement curve, and record and output maximum, least displacement and displacement amplitude are with the change curve of cycle index.Speed of related movement is controlled by loading velocity between the friction pair of this test, and the loading velocity scope is-6000～6000 μ m/min.
The radially fine motion test of controlled deformation is to realize that by the relative displacement between the even part of control contact its step is as follows:
1. at first confirmed test parameter.
2. apply suitable preload (10N) to guarantee that contact is good between even part.
3. do not disengage between the surface of friction pair for guaranteeing, apply an initial load p with certain loading velocity
0
4. the motion of the deformation displacement amplitude Δ D control piston of She Dinging makes the constant deformation displacement of maintenance between friction pair.
Each circulation is finished and is once loaded and unload.Computing machine can write down and export arbitrary radially fine motion round-robin load-deformation displacement-cycle index three-dimensional plot; And write down minimum and maximum load and load amplitude change curve with cycle index.Control speed of related movement between friction pair by the motion frequency (f) of control piston, frequency range is 0.1～800.0Hz.
As required, the entire test of 2 kinds of patterns can be controlled at elastic range or elastic-plastic range, key depends on the added value of cyclic loading the 1st time.In the experimental study of radially fine motion, can select operational mode according to the stressing conditions of the even part of study.If the load change amplitude is constant, then should carry out the test of control load pattern; If the moving displacement amplitude of even part is constant, then should carry out the test of controlled deformation pattern; If outer carrying with relative displacement all changes, then can under 2 kinds of patterns, test respectively.
On radially fine motion test unit as shown in Figure 1, carried out the test of control load and controlled deformation displacement respectively.The material of selecting for use is: going up sample is modified 45 of 10mm * 10mm * 20mm
*Steel and surface ion plating TiN coating (the about 2 μ m of thick coating, HV 2000), the GCr15 ball bearing steel ball that following sample is φ 100mm.Test condition: during control load, loading velocity is 12mm/min, and maximum load is 200N, 400N, 600N and 800N, minimum load 50N, circulation 10
5Inferior; During the controlled deformation displacement, test frequency is 20Hz, and initial load is 300N and 400N, and the displacement amplitude of control is 3 μ m, circulation 10
5Inferior.
Fig. 3, Fig. 4 show TiN coating sample respectively under control load and controlled deformation pattern, carry out the result of 3 tests with same test conditions.As can be seen, data is dispersed little under the revision test condition, shows that the repeatability of test method is better.
Fig. 5 shows the TiN coating under the control load pattern, the test findings during different maximum load, but visible same material has good comparative between the data that obtain under the different tests parameter; Be illustrated in figure 6 as the radially fine motion test findings of different materials under the identical test parameter, as seen its comparability is better equally.Meanwhile, it can also be seen that from Fig. 6 that the TiN coating has better load-bearing capacity than matrix, this is expected to make this test unit to can be used for estimating the frictional behaviour of coating.In addition, test findings shown in the figure (5 and 6) all shows, when the TiN coating experiences the radially fine motion test of high cycle index, identical variation tendency is arranged, deflection increases when being control load, load then reduces during the controlled deformation amount, and this shows that radially the Changing Pattern of fine motion test unit load-distortion under 2 kinds of different control models is consistent.
Claims (2)
1. fine motion test fixture, comprise hydraulic test bench on, following mount pad, last mount pad is a threaded bar, load transducer is located at the last mount pad top of hydraulic test bench, following mount pad is a threaded piston head, the test specimen chuck is formed by the following test specimen chuck that is threaded with following mount pad by the last test specimen chuck that is threaded and one with last mount pad by one, on, following test specimen chuck all has a screw with described threaded engagement, on being somebody's turn to do, lower chuck is installed in respectively on mount pad and the following mount pad by screw, it is characterized in that: on, following test specimen chuck is respectively equipped with boss and groove along the screw axis direction; Last test specimen is installed in the boss place of test specimen chuck, and following test specimen then is installed in down in the groove of test specimen chuck; Last test specimen contacts with following test specimen with the plane, and test specimen contacts with last test specimen with sphere down; Be provided with displacement transducer at the test specimen chuck along a side of screw radial direction.
2. a kind of fine motion test fixture according to claim 1, the load range that it is characterized in that this test fixture is between 0～1000N; Displacement measurement precision 0.2 μ m, external displacement transducer maximum range 60 μ m; Hydraulic pressure is waitd upon dress system control displacement variation range 1～12000 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01108525 CN1281937C (en) | 2001-06-12 | 2001-06-12 | Fixture and method for micro motion experiment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01108525 CN1281937C (en) | 2001-06-12 | 2001-06-12 | Fixture and method for micro motion experiment |
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| CN1391095A CN1391095A (en) | 2003-01-15 |
| CN1281937C true CN1281937C (en) | 2006-10-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102042938B (en) * | 2009-10-22 | 2013-02-13 | 浙江金凯微电子有限公司 | Device and method for measuring deformability of micro metal wire/sphere |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4675788B2 (en) * | 2005-03-31 | 2011-04-27 | 株式会社デンソー | Durability evaluation device |
| CN101178345B (en) * | 2007-12-05 | 2010-11-03 | 西南交通大学 | Twisting or micro-moving frictional wear test device |
| CN101608986B (en) * | 2009-07-06 | 2010-12-29 | 西南交通大学 | Bidirectional final motion test fixture and bidirectional final motion test method thereof |
| CN102279137B (en) * | 2011-06-30 | 2012-11-28 | 西安交通大学 | Tangential fretting test device and test method thereof |
| CN102866058B (en) * | 2012-09-21 | 2014-06-25 | 苏州热工研究院有限公司 | Clamping device for pipe-flat plate line contact fretting wear experiments |
| CN104406844B (en) * | 2014-11-29 | 2017-02-22 | 南京航汇力智能科技有限公司 | End surface contact type upper specimen clamp capable of automatically leveling |
| CN104568619B (en) * | 2014-12-24 | 2017-04-05 | 西南交通大学 | A kind of normal direction charger of fretting fatigue testing system |
| CN105675412A (en) * | 2016-01-14 | 2016-06-15 | 西南交通大学 | Bending fretting fatigue experimental equipment and experimental method |
| CN109211703B (en) * | 2017-12-13 | 2021-04-13 | 中国航空制造技术研究院 | Fretting friction wear test device |
| CN108956353A (en) * | 2018-07-06 | 2018-12-07 | 西南交通大学 | Railway ballast particle high frequency micro-moving frictional wear experiment test device |
| CN110501214B (en) * | 2019-07-03 | 2020-08-14 | 同济大学 | Spherical particle multipoint contact test device and loading method thereof |
| CN112683650A (en) * | 2020-12-09 | 2021-04-20 | 国核电站运行服务技术有限公司 | Normal fretting wear test device for high-temperature and high-pressure water environment |
| CN114252362B (en) * | 2021-12-02 | 2024-03-19 | 北京建筑大学 | Double-shaft loading fretting wear testing machine |
-
2001
- 2001-06-12 CN CN 01108525 patent/CN1281937C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102042938B (en) * | 2009-10-22 | 2013-02-13 | 浙江金凯微电子有限公司 | Device and method for measuring deformability of micro metal wire/sphere |
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