CN201876396U - Measuring device of static normal direction contact stiffness of junction plane - Google Patents
Measuring device of static normal direction contact stiffness of junction plane Download PDFInfo
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- CN201876396U CN201876396U CN2010206399652U CN201020639965U CN201876396U CN 201876396 U CN201876396 U CN 201876396U CN 2010206399652 U CN2010206399652 U CN 2010206399652U CN 201020639965 U CN201020639965 U CN 201020639965U CN 201876396 U CN201876396 U CN 201876396U
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Abstract
本实用新型公开了一种适用于结合面静态法向接触刚度的测量装置，该测量装置包括：测量支架、加载装置、测量装置、调节装置及待测试件；所述加载装置固定放置在测试支架的底部，其正上方依次是测量装置、待测试件及调节装置，加载装置、测量装置、待测试件及调节装置均位于测量支架内。本实用新型的测量装置结构简单，当加载不同的正压力时，本实用新型的测量装置能够针对不同的接触表面形貌、不同的正压力、不同的试验件材料特性等参数对结合面静态法向接触刚度进行测量，并利用实验结果分析接触表面形貌、正压力及试验件材料对法向接触刚度的影响规律。
The utility model discloses a measuring device suitable for the static normal contact stiffness of a joint surface. The measuring device comprises: a measuring bracket, a loading device, a measuring device, an adjusting device and a piece to be tested; the loading device is fixedly placed on the testing bracket The bottom of the bottom, directly above it is the measuring device, the piece to be tested and the adjusting device in sequence, and the loading device, the measuring device, the piece to be tested and the adjusting device are all located in the measuring bracket. The measuring device of the utility model has a simple structure. When loading different positive pressures, the measuring device of the utility model can compare the joint surface static method with respect to parameters such as different contact surface topography, different positive pressures, and different test piece material properties. The contact stiffness in the normal direction is measured, and the influence law of the contact surface morphology, normal pressure and test piece material on the normal contact stiffness is analyzed by using the experimental results.
Description
Technical field:
The utility model belongs to fields of measurement, relates to a kind of normal direction contact stiffness measurement mechanism, and especially a kind of faying face static method is to the contact stiffness measurement mechanism.
Background technology:
Have a large amount of faying faces in complex mechanical systems such as lathe, large aircraft, they have destroyed the continuity of mechanical system structure, influence the complete machine performance of mechanical system dramatically.The connection performance of faying face presents noncontinuity, and faying face characterisitic parameter model drawing-in system complete machine modeling process can be improved the complete machine performance prediction ability in product design stage effectively.Therefore, accurately making up faying face characterisitic parameter model will provide fundamental basis for complicated machinery parts faying face optimal design.
The faying face contact stiffness is as one of faying face key property parameter, and its order of accuarcy will directly influence faying face parameter characteristic model.Therefore the contact stiffness of faying face is relevant with the surface topography and the contact condition of two surface in contacts, studies the pattern of faying face and contact condition influencing rule and will help accurately to determine faying face characterisitic parameter model the faying face contact stiffness.
The utility model content:
The purpose of this utility model provides a kind of static method to the contact stiffness measurement mechanism, and load and displacement by between direct measurement faying face obtain rigidity then.
The utility model is achieved through the following technical solutions, a kind of measurement mechanism that is applicable to the faying face static method to contact stiffness, and this measurement mechanism comprises: measurement bracket, charger, measurement mechanism, regulating device and test specimen to be measured; Described charger fixed placement is measurement mechanism, test specimen to be measured and regulating device directly over it in the bottom of test bracket successively, and charger, measurement mechanism, test specimen to be measured and regulating device all are positioned at measurement bracket.
Described measurement mechanism comprises a pressure transducer, sensor top cap, pressure transducer set collar and an axial extensometer; Pressure transducer be fixed on lifting jack directly over, pressure transducer top cap sleeve is on the measurement top of pressure transducer, the pressure transducer set collar is fixed on the lower supporting plate, pressure transducer and top cap are played fixing and guide effect, and axially extensometer two blades in measuring process are clamped in respectively on two test specimens to be measured.
Described regulating device comprises adjusts screw rod, screw rod guide pin bushing, hollow orienting sleeve, first lock-screw, second lock-screw, spherical ball, test specimen set collar, steel ball set collar; Wherein, the band handle the adjustment screw rod be positioned at measurement bracket directly over, screw rod guide pin bushing and upper backup pad immovable fitting connect with the adjustment screw flight, and the hollow orienting sleeve is fixed on the upper backup pad, the test specimen set collar is arranged in the hollow orienting sleeve, be positioned at test specimen to be measured directly over, first lock-screw and second lock-screw are arranged in the tapped through hole on the hollow orienting sleeve, can screw in back-out, spherical ball is enclosed in the test specimen set collar by the steel ball set collar, can rotate freely in the test specimen set collar.
Described test specimen to be measured comprises test specimen and following test specimen, following test specimen be positioned at pressure transducer top cap directly over, last test specimen be positioned at following test specimen directly over, there is ball-and-socket on the top of last test specimen, it directly over the ball-and-socket spherical ball, cooperate the local contact of faying face when preventing to load by bulb-ball-and-socket, guarantee that entire joint face contacts fully, near the faying face axially extensometer be fixed on test specimen by the clamping blade and down on the test specimen.
Described measurement bracket comprises upper backup pad, first column and is second column and lower supporting plate that the three is assembled into one, remains to maintain static in measuring process.
Described charger comprises a lifting jack, and lifting jack is fixed in the lower supporting plate.
Principle of the present utility model is by load and distortion between direct measurement faying face, obtains rigidity then, so the fairly simple measurement mechanism of principle is simple in structure.When loading different normal pressures, measurement mechanism of the present utility model can be measured to contact stiffness the faying face static method, and utilize interpretation surface in contact pattern, normal pressure and the testpieces material rule that influences to the normal direction contact stiffness at different surface in contact patterns, different normal pressures, different parameters such as testpieces material behavior.
Description of drawings:
Fig. 1 is a measurement mechanism structural representation of the present utility model;
Wherein: 1 for adjusting screw rod; 2 is upper backup pad; 3-1 is first lock-screw; 3-2 is second lock-screw; 4 is the test specimen set collar; 5 is last test specimen; 6 is the pressure transducer set collar; 7-1 is first column; 7-2 is second column; 8 is lower supporting plate; 9 is lifting jack; 10 is pressure transducer; 11 is pressure transducer top cap; 12 are following test specimen; 13 is axial extensometer; 14 is the steel ball set collar; 15 is spherical ball; 16 is the hollow orienting sleeve; 17 is the screw rod guide pin bushing.
Embodiment:
Below in conjunction with accompanying drawing the utility model is done and to be described in further detail:
As shown in Figure 1, the utility model is a kind of measurement mechanism that is applicable to the faying face static method to contact stiffness, and this measurement mechanism comprises: measurement bracket, charger, measurement mechanism, regulating device and test specimen to be measured.
Measurement bracket comprises upper backup pad 2, the first column 7-1 and is the second column 7-2 and lower supporting plate 8 that the three is assembled into one, remains to maintain static in measuring process.
Charger comprises a lifting jack 9, and lifting jack 9 is fixed in the lower supporting plate 8.
Measurement mechanism comprises pressure transducer 10, pressure transducer top cap 11, pressure transducer set collar 6 and axial extensometer 13.Wherein: pressure transducer 10 be fixed on lifting jack 9 directly over, pressure transducer top cap 11 is enclosed within the measurement top of pressure transducer 10, pressure transducer set collar 6 is fixed on the lower supporting plate 8, pressure transducer 10 and top cap 11 are played fixing and guide effect, and axially extensometer 13 two blades in measuring process are clamped in respectively on two test specimens to be measured.
Regulating device comprises adjusts screw rod 1, screw rod guide pin bushing 17, hollow orienting sleeve 16, the first lock-screw 3-1 and the second lock-screw 3-2, spherical ball 15, test specimen set collar 4, steel ball set collar 14.Wherein, the band handle adjustment screw rod 1 be positioned at measurement bracket directly over, screw rod guide pin bushing 17 and upper backup pad 2 immovable fitting, with adjustment screw rod 1 thread connection, hollow orienting sleeve 16 is fixed on the upper backup pad 2, test specimen set collar 4 is arranged in the hollow orienting sleeve 16, be positioned at test specimen to be measured directly over, the first lock-screw 3-1 and the second lock-screw 3-2 are arranged in the tapped through hole on the hollow orienting sleeve 16, can screw in back-out, spherical ball 15 is enclosed in the test specimen set collar 4 by steel ball set collar 14, can be in the test specimen set collar 4 rotates freely.
Test specimen to be measured comprises test specimen 5 and following test specimen 12, following test specimen 12 be positioned at pressure transducer top cap 11 directly over, last test specimen 5 be positioned at following test specimen 12 directly over, there is ball-and-socket on the top of last test specimen 5, be spherical ball 15 directly over the ball-and-socket, cooperate, the local contact of faying face in the time of can preventing to load by bulb-ball-and-socket, guarantee that entire joint face contacts fully, be fixed on by the clamping blade on test specimen 5 and the following test specimen 12 near axial extensometer 13 faying face.
Adopt the utility model to carry out the faying face static method when the measurement of contact stiffness, specific implementation process comprises the following steps:
1) regulates adjustment screw rod 1, test specimen set collar 4 can be slided up and down in hollow orienting sleeve 16, regulate the first lock-screw 3-1 and the second lock-screw 3-2, make test specimen set collar 4 be fixed on a suitable position and conveniently put into test specimen;
2) the following test specimen 12 that will have a particular surface roughness be placed on pressure transducer top cap 11 directly over, last test specimen 5 be placed on down test specimen 12 directly over, make spherical ball 15 embed ball-and-socket, fixedly test specimens by regulating the adjustment screw rod 1 and the first lock-screw 3-1 and the second lock-screw 3-2;
3) lifting jack 9 is evenly afterburning, and until arriving predetermined maximum pressure, the pressure between faying face and the distortion of test specimen record by pressure transducer 10 and axial extensometer 13 respectively, evenly gather the data of power and distortion
4) after one group of experiment is finished, repeat above-mentioned steps, change next group test specimen, so, can obtain the measurement data of the dissimilar faying face of many groups
5) in every group of test specimen, obtain the data of many group pressure and displacement after, carry out Data Post, obtain the pressure-displacement curve of every group of test specimen faying face, thereby try to achieve static method between faying face to contact stiffness.
Measuring principle of the present utility model is that when applying the normal direction normal pressure at the faying face two ends, axially the distortion of extensometer measurement comprises two parts: the one, and the normal direction distortion of faying face, the 2nd, the elastic deformation of the material between two clamping blades of axial extensometer.The elastic deformation of material can be by Hooke's law
Directly calculate, wherein, F is the normal direction normal pressure between faying face, and A is the nominal contact area of faying face, and L is the distance of test specimen faying face end distance from axial extensometer clamping blade.Therefore, the normal direction distortion that under the effect of normal direction normal pressure F, produced of faying face: δ=W-Δ L
1-Δ L
2, wherein, W is the distortion that axial extensometer records, Δ L
1, Δ L
2It is the elastic deformation of the material that obtains of Theoretical Calculation.Like this, under repeatedly loading by pressure transducer measure normal pressure, axially extensometer is measured distortion and just can obtained the force-displacement curve of faying face, thereby the static method of trying to achieve faying face is to contact stiffness.
Above content is to further describing that the utility model is done in conjunction with concrete preferred implementation; can not assert that embodiment of the present utility model only limits to this; for the utility model person of an ordinary skill in the technical field; under the prerequisite that does not break away from the utility model design; can also make some simple deduction or replace, all should be considered as belonging to the utility model and determine scope of patent protection by claims of being submitted to.
Claims (6)
1. measurement mechanism that is applicable to the faying face static method to contact stiffness, it is characterized in that: this measurement mechanism comprises: measurement bracket, charger, measurement mechanism, regulating device and test specimen to be measured; Described charger fixed placement is measurement mechanism, test specimen to be measured and regulating device directly over it in the bottom of test bracket successively, and charger, measurement mechanism, test specimen to be measured and regulating device all are positioned at measurement bracket.
2. a kind of according to claim 1 measurement mechanism that is applicable to the faying face static method to contact stiffness is characterized in that: described measurement mechanism comprises a pressure transducer, sensor top cap, pressure transducer set collar and an axial extensometer; Pressure transducer be fixed on lifting jack directly over, pressure transducer top cap sleeve is on the measurement top of pressure transducer, the pressure transducer set collar is fixed on the lower supporting plate, pressure transducer and top cap are played fixing and guide effect, and axially extensometer two blades in measuring process are clamped in respectively on two test specimens to be measured.
3. a kind of according to claim 1 measurement mechanism that is applicable to the faying face static method to contact stiffness is characterized in that: described regulating device comprises adjusts screw rod, screw rod guide pin bushing, hollow orienting sleeve, first lock-screw, second lock-screw, spherical ball, test specimen set collar, steel ball set collar; Wherein, the band handle the adjustment screw rod be positioned at measurement bracket directly over, screw rod guide pin bushing and upper backup pad immovable fitting connect with the adjustment screw flight, and the hollow orienting sleeve is fixed on the upper backup pad, the test specimen set collar is arranged in the hollow orienting sleeve, be positioned at test specimen to be measured directly over, first lock-screw and second lock-screw are arranged in the tapped through hole on the hollow orienting sleeve, can screw in back-out, spherical ball is enclosed in the test specimen set collar by the steel ball set collar, rotates freely in the test specimen set collar.
4. a kind of according to claim 1 measurement mechanism that is applicable to the faying face static method to contact stiffness, it is characterized in that: described test specimen to be measured comprises test specimen and following test specimen, following test specimen be positioned at pressure transducer top cap directly over, last test specimen be positioned at following test specimen directly over, there is ball-and-socket on the top of last test specimen, it directly over the ball-and-socket spherical ball, by bulb-local contact of faying face when ball-and-socket cooperation prevents to load, guarantee that entire joint face contacts fully, be fixed on by the clamping blade on test specimen and the following test specimen near the axial extensometer faying face.
5. a kind of according to claim 1 measurement mechanism that is applicable to the faying face static method to contact stiffness, it is characterized in that: described measurement bracket comprises upper backup pad, first column and is second column and lower supporting plate, the three is assembled into one, remains to maintain static in measuring process.
6. a kind of according to claim 1 measurement mechanism that is applicable to the faying face static method to contact stiffness is characterized in that: described charger comprises a lifting jack, and lifting jack is fixed in the lower supporting plate.
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| CN2010206399652U CN201876396U (en) | 2010-12-03 | 2010-12-03 | Measuring device of static normal direction contact stiffness of junction plane |
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| CN2010206399652U CN201876396U (en) | 2010-12-03 | 2010-12-03 | Measuring device of static normal direction contact stiffness of junction plane |
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| CN102426085A (en) * | 2011-08-19 | 2012-04-25 | 西安理工大学 | Device and method for testing contact rigidity of spherical surface-revolution surface junction surface |
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| CN102589865A (en) * | 2012-02-17 | 2012-07-18 | 北京工业大学 | Normal stiffness and hysteresis characteristic test experimental device for double-bolt joint surface |
| WO2013020328A1 (en) * | 2011-08-09 | 2013-02-14 | 西安理工大学 | Device and method for testing relationship between rigidity and non-linearity of coupling interface for cylindrical fitting |
| CN103115778A (en) * | 2012-07-03 | 2013-05-22 | 重庆长安汽车股份有限公司 | Fixing device for measurement of rigidity of automobile emission lifting lug |
| CN103217278A (en) * | 2013-01-05 | 2013-07-24 | 北京工业大学 | Device and method for testing normal static characteristics of junction surface of high-strength bolt |
| CN103257050A (en) * | 2013-03-27 | 2013-08-21 | 清华大学 | Three-directional static rigidity synchronous testing system for machine tool |
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- 2010-12-03 CN CN2010206399652U patent/CN201876396U/en not_active Expired - Lifetime
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| CN102426085A (en) * | 2011-08-19 | 2012-04-25 | 西安理工大学 | Device and method for testing contact rigidity of spherical surface-revolution surface junction surface |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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Granted publication date: 20110622 |