CN203643255U - In-situ pull/press-torsion combined load material micromechanics test platform - Google Patents
In-situ pull/press-torsion combined load material micromechanics test platform Download PDFInfo
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- CN203643255U CN203643255U CN201320656458.3U CN201320656458U CN203643255U CN 203643255 U CN203643255 U CN 203643255U CN 201320656458 U CN201320656458 U CN 201320656458U CN 203643255 U CN203643255 U CN 203643255U
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Abstract
The utility model relates to an in-situ pull/press-torsion combined load material micromechanics test platform and belongs to the field of material mechanics tests. The in-situ pull/press-torsion combined load material micromechanics test platform consists of a base, a precise loading unit, a detection control unit and a clamping and connecting unit, wherein the precise loading unit comprises a torque loading unit and a pull-press loading unit, and can be used for realizing the independent and combined loading of pull-press loads and torque loads; aiming at the pull-press loads and the torque loads, and the detection control unit is used for performing load detection by a pull/press force sensor and a torque sensor respectively and is combined with a contact-type capacitance displacement sensor, a circular grating ruler and a photoelectric encoder to monitor and control a loading mechanism. The in-situ pull/press-torsion combined load material micromechanics test platform is compact in structure, small in size and controllable in strain rate, and can be used for performing in-situ monitoring on microstructure changes, deformation damage mechanisms and performance evolution laws of a material under the action of the combined load, so that an effective test method for revealing the micro-nano mechanics characteristics and damage mechanisms of materials under an approximate service condition is provided.
Description
Technical field
The utility model relates to Material mechanics test field, particularly a kind of original position draw/press-reverse combined load material Micromechanics test platform.Can under the dynamic monitoring of the solid-state material performance characterization instruments such as scanning electron microscope, metaloscope, Raman spectrometer, X-ray diffractometer, research and analyse stretching/compressing load, torsional load effect, particularly stretching/compressing and heterogeneous microstructure variation, deformation damage mechanism and the property evolution rule of reversing test specimen specimen material under combined load acting in conjunction, can synchronously carry out precision detection, analysis and the closed-loop control of load/displacement signal in conjunction with detection control unit.Can the microdeformation under Action of Combined Loads, damage and fracture process carry out in-situ monitoring to material by the utility model, provide effective method of testing for disclosing material approaching the mechanical characteristic under micro-nano-scale and damage mechanism under service condition.
Background technology
Original position micro nanometer mechanics measuring technology refers under micro-nano-scale carries out in Mechanics Performance Testing process material for test, and the microdeformation, damage that material under load are occurred by Image-forming instruments such as electron microscope, atomic force microscope and optical microscopes are until the process of failure damage is carried out a kind of mechanical test technology of omnidistance dynamic monitoring.In the category of many micro nanometer mechanics parameter testings, the parameters such as elastic modulus, shear modulus, yield limit twisting strength are the topmost research objects in characteristic of material mechanics test, produce various test for these mechanics parameters, as torsional technique, pulling method and Using Nanoindentation etc.Test and can disclose by in-situ mechanical, the rule of material deformation damage under extraneous load, under combined load, in-situ mechanical test is conducive to research material and goods are approaching comparatively real mechanical behavior and deformation damage mechanism under service state.
The research of current precise materials mechanical property combined load in-situ test is not perfect, be in particular in: (1) is subject to various scope cavity size restrictions, most research all concentrate on take micro-/receive Mechatronic Systems technique as basis, on the simple in-situ nano extension test of the atomic minor structures such as nanotube, nano wire and membraneous material.Thereby lack the further investigation of the trans-scale in-situ nanometer mechanical test to macro-size (membraneous material or three-dimensional test specimen), thereby seriously hinder academia to the Micromechanics behavior of large-size element and the machine-processed new phenomenon of damage, the discovery of new rule; (2) from means of testing and method, the original position stretching test that the in-situ nano impression test mainly being undertaken by business-like nano-hardness tester and in-situ nano tensilometer carry out.All there is cost of equipment costliness in two kinds of methods, method of testing is single, the feature that content measurement is of inadequate achievement, and to compact conformation, the small and exquisite combined load in-situ testing device of volume rarely has to be mentioned, has greatly restricted going deep into and development of research; (3) from content measurement, the content measurement of existing instrument and equipment is relatively single, the composite test instrument of two kinds and two or more load type rarely has to be mentioned, has limited the Micro Mechanical Properties of material under complex working condition and has damaged machine-processed research and deeply change.
Before the application of nanometer stretching/compression-torsion combined load mechanical test technology, stretching/compressing test is generally the test of offing normal in Material Testing Machine with twisting test in position.Testing machine loads sample equably according to the speed of regulation, draw load elongation chart by testing machine, and then obtain stress-strain curve under load, therefore, initial drawing machine and shear tester are after material is broken or cut off, and draw the mechanics parameters such as the tensile yield limit, the pulling strengrth limit, shear Yield strength, the shearing limit of material.Tradition drawing machine and shear tester for be all grand material yardstick test specimen, do not relate to the mechanical property research of material nano yardstick category, also do not relate to the in-situ observation under high resolving power micro imaging system.
Therefore, design that a kind of volume is little, compact conformation, measuring accuracy is high, can utilize stretching/compressing-torsion combined load mechanical test platform of the microdeformation of the imaging system Real-Time Monitoring such as electron microscope macroscopic view test specimen under load and damage process very necessary.
Summary of the invention
The purpose of this utility model be to provide a kind of original position draw/press-reverse combined load material Micromechanics test platform, solved the problems referred to above that prior art exists, and filled up to a certain extent the blank of prior art.In order to realize, precision is high, strain rate is controlled, volume is little, the device that can be used for the test of precise materials Micro Mechanical Properties original position combined load of delicate structure provides a kind of effectively scheme.The mechanics parameter such as shear modulus, yield limit and strength degree that obtains material by original position stretching/compression-torsion test, the in the situation that of known materials Poisson ratio, also can also can obtain by simple computation the elastic modulus of material.Can monitor heterogeneous microstructure variation, deformation damage mechanism and the property evolution rule of material by this proving installation, provide method of testing for disclosing mechanical characteristic and the damage mechanism of material under micro-scale.
Above-mentioned purpose of the present utility model is achieved through the following technical solutions:
Original position draws/presses-reverse combined load material Micromechanics test platform, comprise test platform pedestal 40, accurate loading unit, detection control unit, clamping and linkage unit, described accurate loading unit comprises moment of torsion loading unit and tension and compression loading unit, by precision DC servomotor I, II 9, 17, twice-enveloping type worm couple I, II, precise ball screw pair, precise ball line slideway composition, wherein precision DC servomotor I, II 9, 17 can provide high resolving power moment of torsion and angular displacement output, twice-enveloping type worm couple I can provide 2500:1 compared with big retarding ratio, can be to precision DC servomotor I, II 9, the power of 17 outputs slows down largely, increase square, provide Ultra-Low Speed quasi-static load mode to respectively moment of torsion loading unit and tension and compression loading unit,
Described detection control unit comprises reverses detection control section and stretching/compressing detection control section, described torsion detects control section by accurate torque sensor 7, accurate circle grating scale 8, justify grating reading head 39 and count photoelectric encoder 11 with the high line that precision DC servomotor I 9 is synchronized with the movement and form, can be test platform provides and comprises distortion angular speed, moment of torsion loading speed, scrambler demarcation angular displacement speed is the feedback signal source as pulse/direction closed loop control mode of precision DC servomotor I 9 in three kinds of interior analog or digital amounts, be that moment of torsion loading unit can be realized permanent angular deforming velocity, permanent moment of torsion loading speed and permanent coding are demarcated three kinds of load/unload modes of angular displacement speed, described stretching/compressing detects control section by accurate pull pressure sensor 16, accurate contact capacitance displacement sensor 32 and count photoelectric encoder 15 with the high line that precision DC servomotor II 17 is synchronized with the movement and form, can be test platform provides and comprises distortion angular speed, moment of torsion loading speed, scrambler demarcation angular displacement speed is the feedback signal source as pulse/direction closed loop control mode of precision DC servomotor II 17 in three kinds of interior analog or digital amounts, be that tension and compression loading unit can be realized permanent rate of deformation, permanent loading speed and permanent coding are demarcated three kinds of load/unload modes of rate of displacement,
Described clamping and linkage unit comprise test specimen 37, clamp body I 12, clamp body II 13, and the upper lower platen of described test specimen 37 by clamp body I, II 12,13 and screw are to compress mode positioning clamping.
Described moment of torsion loading unit comprises precision DC servomotor I 9, one-level worm screw I 5, first-stage worm gear I 4, second-stage worm gear I 1, second-stage worm I 43, torque sensor flange frame I 41, torque sensor flange frame II 44, clamp body I 12, described second-stage worm I 43 is arranged on test platform pedestal 40 with screw by bearing and bearing seat, torque sensor flange frame I 41 is supported and is fixed by twist cell bearing I 3 and twist cell bearing seat I 2, precision DC servomotor I 9 is arranged on test platform pedestal 40 by motor flange dish I 6, the twice-enveloping type worm couple I that is 1:50 through reduction gear ratio is slowed down, increase square, moment of torsion is passed through to torque sensor flange frame I, II 41, 44 and accurate torque sensor 7 be loaded on test specimen 37, described twice-enveloping type worm couple I is made up of the second-stage worm gear I 1 cooperatively interacting, second-stage worm I 43 and first-stage worm gear I 4, one-level worm screw I 5.
Described tension and compression loading unit comprises precision DC servomotor II 17, precision ball screw nut pedestal 30, precise ball line slideway 19, precise ball straight-line guide rail slide block 33, precise linear guide 31, pull pressure sensor planker 14, clamp body II 13, and by the one-level worm screw II 22 cooperatively interacting, first-stage worm gear II 23, second-stage worm II 26, the twice-enveloping type worm couple II that second-stage worm gear II 27 forms, by precision ball screw fixed pedestal I 20, precision ball screw 29, the precise ball screw pair that precise ball guide rail base II 47 forms, is wherein arranged on the twice-enveloping type worm couple II that the precision DC servomotor II 17 in motor flange dish II 21 is 1:50 by reduction gear ratio and slows down, increase square, its worm couple is by second-stage worm bearing seat I, II 24, 28 are arranged on test platform pedestal 40, and moment of torsion slows down and exports straight-line displacement, pull pressure sensor pedestal 18 by feed screw nut through the precise ball screw pair being arranged on pedestal, accurate pull pressure sensor 16, precision ball screw nut pedestal 30 is arranged on respectively on feed screw nut, in the precise ball line slideway auxiliary being made up of precise ball line slideway 19 and precision ball screw nut pedestal 30 and the location of precise linear guide 31, under guide effect, Tensile or Compressive Loading is loaded on to test specimen 37.
The high line of described moment of torsion detection control section is counted photoelectric encoder I 11 and is arranged on precision DC servomotor I 9 tail ends, accurate torque sensor 7 by two ends flange connect between torque sensor flange frame I 41 and accurate circle grating scale 8 to transmit and to measure moment of torsion, circle grating reading head 39 passes through groove location and installation on test platform pedestal 40, and can adjust with the distance of precision circle grating scale 8 to reach optimum detection effect; The high line of stretching/compressing detection control section is counted photoelectric encoder II 15 and is arranged on precision DC servomotor II 17 tail ends, and accurate pull pressure sensor 16 is arranged between pull pressure sensor pedestal 18 and pull pressure sensor planker 14.
Described original position draws/presses-reverse the size of main body of combined load material Micromechanics test platform
approximatelyfor 266mm × 100mm × 72mm, there is good structure compatible, vacuum compatibility and Electro Magnetic Compatibility with Zeiss EVO 18 and Hitachi TM-1000 type scanning electron microscope.On test platform pedestal 40, there is X-ray diffraction (XRD) passage 36, can use with other main flow commercialization scanning electron microscope, X-ray diffractometer, atomic force microscope and optical microscope etc. are compatible.
The support of described moment of torsion loading unit and locating device comprise twist cell bearing seat I, II 2,38, twist cell bearing I, II 3,10, motor flange dish I 6, second-stage worm bearing seat III 42, described twist cell bearing seat II 38 and twist cell bearing II 10 are born the Tensile or Compressive Loading from torque sensor flange frame II 44, make 7 of accurate torque sensors bear not Tensile/compressive load of moment of torsion.
The support of described tension and compression loading unit and locating device comprise pull pressure sensor planker 14, precise linear guide 31, pull pressure sensor pedestal 18, motor flange dish II 21, second-stage worm bearing seat I 24, second-stage worm bearing I 25, second-stage worm bearing seat II 28, be passed to the torque load of pull pressure sensor planker 14 through clamp body II 13, born by planker both sides precise linear guide 31, and the degree of freedom that keeps test specimen axis direction, makes 16 of accurate pull pressure sensor bear stretching/compressing load and not affected by torque load.
The beneficial effects of the utility model are: compared with prior art, the utility model volume is small and exquisite, compact conformation, measuring accuracy is high, angular strain speed is controlled, mate with various main flow electron microscope vacuum cavities, have wide range of applications, can carry out the test of trans-scale in-situ stretching/compressing-torsion combined load to the above macroscopical test specimen of the characteristic dimension grade of various materials, material and goods thereof are dynamically observed at the microdeformation under combined load, to disclose the mechanical behavior of material under micro-nano-scale and damage mechanism.And by the synchronous detection of load/displacement signal, in conjunction with related algorithm, also can generate the stress-strain curve under load by automatic Fitting.In sum, the utility model is to enriching original position micro nanometer mechanics content measurement and promoting material mechanical performance measuring technology and equipment to have important theory significance and good application and development prospect.The utility model can be researched and analysed stretching/compressing load, torsional load effect under the dynamic monitoring of the solid-state material performance characterization instruments such as scanning electron microscope, metaloscope, Raman spectrometer, X-ray diffractometer, particularly stretching/compressing and heterogeneous microstructure variation, deformation damage mechanism and the property evolution rule of reversing test specimen specimen material under combined load acting in conjunction, can synchronously carry out precision detection, analysis and the closed-loop control of load/displacement signal in conjunction with detection control unit.The utility model and market mainstream Image-forming instrument have good use compatibility.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide further understanding of the present utility model, forms the application's a part, and illustrative example of the present utility model and explanation thereof are used for explaining the utility model, do not form improper restriction of the present utility model.
Fig. 1 is overall appearance structural drawing of the present utility model;
Fig. 2 is front view of the present utility model;
Fig. 3 is vertical view of the present utility model;
Fig. 4 is left view of the present utility model;
Fig. 5 is right view of the present utility model.
In figure: 1. second-stage worm gear I, 2. twist cell bearing seat I, 3. twist cell bearing I, 4. first-stage worm gear I, 5. one-level worm screw I, 6. motor flange dish I, 7. accurate torque sensor, 8. accurate circle grating scale, 9. precision DC servomotor I, 10. twist cell bearing II, 11. high lines are counted photoelectric encoder I, 12. clamp body I, 13. clamp body II, 14. pull pressure sensor plankers, 15. high lines are counted photoelectric encoder II, 16. accurate pull pressure sensor, 17. precision DC servomotor II, 18. pull pressure sensor pedestals, 19. precise ball line slideways, 20. precision ball screw fixed pedestal I, 21. motor flange dish II, 22. one-level worm screw II, 23. first-stage worm gear II, 24. second-stage worm bearing seat I, 25. second-stage worm bearing I, 26. second-stage worm II, 27. second-stage worm gear II, 28. second-stage worm bearing seat II, 29. precision ball screws, 30. precision ball screw nut pedestals, 31. precise linear guides, 32. accurate contact capacitance displacement sensors, 33. precise ball straight-line guide rail slide blocks, 34. precise ball guide rail base I, 35. displacement transducer connection seats, 36. X-ray diffractions (XRD) passage, 37. test specimens, 38. twist cell bearing seat II, 39. circle grating reading heads, 40. test platform pedestals, 41. torque sensor flange frame I, 42. second-stage worm bearing seat III, 43. second-stage worm I, 44. torque sensor flange frame II, 45. clamp body upper holder blocks, 46. clamp body lower lock blocks, 47. precise ball guide rail base II.
Embodiment
Further illustrate detailed content of the present utility model and embodiment thereof below in conjunction with accompanying drawing.
Referring to shown in Fig. 1 to Fig. 5, original position of the present utility model draws/presses-reverse combined load material Micromechanics test platform, comprise test platform pedestal 40, accurate loading unit, detection control unit, clamping and linkage unit, described accurate loading unit comprises moment of torsion loading unit and tension and compression loading unit, by precision DC servomotor I, II 9, 17, twice-enveloping type worm couple I, II, precise ball screw pair, precise ball line slideway composition, wherein precision DC servomotor I, II 9, 17 can provide high resolving power moment of torsion and angular displacement output, twice-enveloping type worm couple I can provide 2500:1 compared with big retarding ratio, can be to precision DC servomotor I, II 9, the power of 17 outputs slows down largely, increase square, provide Ultra-Low Speed quasi-static load mode to respectively moment of torsion loading unit and tension and compression loading unit,
Described detection control unit comprises reverses detection control section and stretching/compressing detection control section, described torsion detects control section by accurate torque sensor 7, accurate circle grating scale 8, justify grating reading head 39 and count photoelectric encoder 11 with the high line that precision DC servomotor I 9 is synchronized with the movement and form, can be test platform provides and comprises distortion angular speed, moment of torsion loading speed, scrambler demarcation angular displacement speed is the feedback signal source as pulse/direction closed loop control mode of precision DC servomotor I 9 in three kinds of interior analog or digital amounts, be that moment of torsion loading unit can be realized permanent angular deforming velocity, permanent moment of torsion loading speed and permanent coding are demarcated three kinds of load/unload modes of angular displacement speed, described stretching/compressing detects control section by accurate pull pressure sensor 16, accurate contact capacitance displacement sensor 32 and count photoelectric encoder 15 with the high line that precision DC servomotor II 17 is synchronized with the movement and form, can be test platform provides and comprises distortion angular speed, moment of torsion loading speed, scrambler demarcation angular displacement speed is the feedback signal source as pulse/direction closed loop control mode of precision DC servomotor II 17 in three kinds of interior analog or digital amounts, be that tension and compression loading unit can be realized permanent rate of deformation, permanent loading speed and permanent coding are demarcated three kinds of load/unload modes of rate of displacement, detection control unit, for torque signal detection and control section and stretching/compressing detection and control section, respectively by the structural design to torque sensor flange frame I, II 41,44, twist cell bearing seat I, II 2,38 and pull pressure sensor planker 14, make accurate torque sensor 7 and accurate pull pressure sensor 16 all only bear the load tested separately, thereby improve measuring accuracy, and avoided the use of expensive tension-torsion sensor, reduce test platform cost.
Described clamping and linkage unit comprise test specimen 37, clamp body I 12, clamp body II 13, and the upper lower platen of described test specimen 37 by clamp body I, II 12,13 and screw are to compress mode positioning clamping.
Described moment of torsion loading unit comprises precision DC servomotor I 9, one-level worm screw I 5, first-stage worm gear I 4, second-stage worm gear I 1, second-stage worm I 43, torque sensor flange frame I 41, torque sensor flange frame II 44, clamp body I 12, described second-stage worm I 43 is arranged on test platform pedestal 40 with screw by bearing and bearing seat, torque sensor flange frame I 41 is supported and is fixed by twist cell bearing I 3 and twist cell bearing seat I 2, precision DC servomotor I 9 is arranged on test platform pedestal 40 by motor flange dish I 6, the twice-enveloping type worm couple I that is 1:50 through reduction gear ratio is slowed down, increase square, moment of torsion is passed through to torque sensor flange frame I, II 41, 44 and accurate torque sensor 7 be loaded on test specimen 37, described twice-enveloping type worm couple I is made up of the second-stage worm gear I 1 cooperatively interacting, second-stage worm I 43 and first-stage worm gear I 4, one-level worm screw I 5.
Described tension and compression loading unit comprises precision DC servomotor II 17, precision ball screw nut pedestal 30, precise ball line slideway 19, precise ball straight-line guide rail slide block 33, precise linear guide 31, pull pressure sensor planker 14, clamp body II 13, and by the one-level worm screw II 22 cooperatively interacting, first-stage worm gear II 23, second-stage worm II 26, the twice-enveloping type worm couple II that second-stage worm gear II 27 forms, by precision ball screw fixed pedestal I 20, precision ball screw 29, the precise ball screw pair that precise ball guide rail base II 47 forms, is wherein arranged on the twice-enveloping type worm couple II that the precision DC servomotor II 17 in motor flange dish II 21 is 1:50 by reduction gear ratio and slows down, increase square, its worm couple is by second-stage worm bearing seat I, II 24, 28 are arranged on test platform pedestal 40, and moment of torsion slows down and exports straight-line displacement, pull pressure sensor pedestal 18 by feed screw nut through the precise ball screw pair being arranged on pedestal, accurate pull pressure sensor 16, precision ball screw nut pedestal 30 is arranged on respectively on feed screw nut, in the precise ball line slideway auxiliary being made up of precise ball line slideway 19 and precision ball screw nut pedestal 30 and the location of precise linear guide 31, under guide effect, Tensile or Compressive Loading is loaded on to test specimen 37.
The high line of described moment of torsion detection control section is counted photoelectric encoder I 11 and is arranged on precision DC servomotor I 9 tail ends, accurate torque sensor 7 by two ends flange connect between torque sensor flange frame I 41 and accurate circle grating scale 8 to transmit and to measure moment of torsion, circle grating reading head 39 passes through groove location and installation on test platform pedestal 40, and can adjust with the distance of precision circle grating scale 8 to reach optimum detection effect; The high line of stretching/compressing detection control section is counted photoelectric encoder II 15 and is arranged on precision DC servomotor II 17 tail ends, and accurate pull pressure sensor 16 is arranged between pull pressure sensor pedestal 18 and pull pressure sensor planker 14.
Described original position draws/presses-reverse the size of main body of combined load material Micromechanics test platform
approximatelyfor 266mm × 100mm × 72mm, there is good structure compatible, vacuum compatibility and Electro Magnetic Compatibility with Zeiss EVO 18 and Hitachi TM-1000 type scanning electron microscope.On test platform pedestal 40, there is X-ray diffraction (XRD) passage 36, can use with other main flow commercialization scanning electron microscope, X-ray diffractometer, atomic force microscope and optical microscope etc. are compatible.
The support of described moment of torsion loading unit and locating device comprise twist cell bearing seat I, II 2,38, twist cell bearing I, II 3,10, motor flange dish I 6, second-stage worm bearing seat III 42, described twist cell bearing seat II 38 and twist cell bearing II 10 are born the Tensile or Compressive Loading from torque sensor flange frame II 44, make 7 of accurate torque sensors bear not Tensile/compressive load of moment of torsion.
The support of described tension and compression loading unit and locating device comprise pull pressure sensor planker 14, precise linear guide 31, pull pressure sensor pedestal 18, motor flange dish II 21, second-stage worm bearing seat I 24, second-stage worm bearing I 25, second-stage worm bearing seat II 28, be passed to the torque load of pull pressure sensor planker 14 through clamp body II 13, born by planker both sides precise linear guide 31, and the degree of freedom that keeps test specimen axis direction, makes 16 of accurate pull pressure sensor bear stretching/compressing load and not affected by torque load.
The torsion of detection control unit of the present utility model detects control section, detect torsion/angular displacement signal by accurate torque sensor 7, accurate circle grating scale 8, circle grating reading head 39, demarcate three kinds of analog or digital amounts angular displacement speed feedback signal source as pulse/direction closed loop control mode of precision DC servomotor I 9 for test platform provides including distortion angular speed, moment of torsion loading speed, scrambler.Test platform can be realized permanent angular deforming velocity, permanent moment of torsion loading speed and permanent coding and demarcate three kinds of load/unload modes of angular displacement speed.High line is counted photoelectric encoder I 11, in conjunction with Accelnet type servo position control module, precision DC servomotor I 9 is carried out to accurate Angular displacement control, thereby guarantees in test process that the angular strain speed of test specimen 37 is adjustable and export given torque value.In like manner, stretching/compressing detects control section, provides pressure/displacement signal by accurate pull pressure sensor 16, accurate contact capacitance displacement sensor 32, exports stretching/compressing load by closed loop control mode control precision DC servomotor II 17.
The utility model is in concrete test process, test specimen 37 adopts turning processing by line cutting mode, retained part to be processed to the symmetrical plane for clamping again, and utilize small-sized cylindrical polishing machine to carry out polishing to the time, obtain can be used for the better surface smoothness of high resolving power micro-imaging monitoring, or obtain the microstructures such as metallographic by techniques such as chemical corrosions.Then by test specimen 37 clampings between the upper lower lock block of pressing block type chuck, tighten afterwards pressing plate trip bolt, complete test specimen clamping.Close the airtight baffle plate of scanning electron microscope vacuum chamber and in XOY plane, draft the accurate location of test point by the article carrying platform of scanning electron microscope self.Then, test piece deformation amount or the control mode of given stretching/compressing-torsion test, mode with pulse output drives beginning test process, by testing algorithm program setting test condition and parameter, under the effect of time sequential pulse control signal, precision DC servomotor I, the accurate angular displacement of II 9,17 output, load the Ultra-Low Speed quasistatic of test specimen 37 than the deceleration of twice-enveloping type worm couple, the final realization of increment compared with big retarding by two-stage.In test process, accurate torque sensor 7 detects the moment of torsion M of test specimen 37, and torsional deflection amount h is synchronously picked up by precision circle grating scale 8; Accurate pull pressure sensor 16 detects test specimen stretching/compressing axis load F, and straight line deflection b is detected by accurate contact capacitance displacement sensor 32.Four road signals are by analog to digital conversion and carry out sending into computing machine after necessary signal condition.In the whole process of test, the deformation damage situation of test specimen 37 material under load is carried out dynamic monitoring by the scanning electron microscope imaging system of high magnification, and document image simultaneously, the important mechanics parameters such as stress-strain curve that also can Real-time Obtaining exosyndrome material mechanical property in conjunction with software, shear modulus, elastic modulus.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All any modifications that the utility model is done, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (7)
- An original position draw/press-reverse combined load material Micromechanics test platform, it is characterized in that: comprise test platform pedestal (40), accurate loading unit, detection control unit, clamping and linkage unit, described accurate loading unit comprises moment of torsion loading unit and tension and compression loading unit, by precision DC servomotor I, II (9, 17), twice-enveloping type worm couple I, II, precise ball screw pair, precise ball line slideway composition, wherein precision DC servomotor I, II (9, 17) can provide high resolving power moment of torsion and angular displacement output, twice-enveloping type worm couple I can provide the reduction gear ratio of 2500:1, can be to precision DC servomotor I, II (9, 17) power of output slows down largely, increase square, provide Ultra-Low Speed quasi-static load mode to respectively moment of torsion loading unit and tension and compression loading unit,Described detection control unit comprises reverses detection control section and stretching/compressing detection control section, described torsion detects control section by accurate torque sensor (7), accurate circle grating scale (8), justify grating reading head (39) and count photoelectric encoder (11) composition with the high line that precision DC servomotor I (9) is synchronized with the movement, can provide and comprise distortion angular speed, moment of torsion loading speed, scrambler demarcation angular displacement speed is the feedback signal source as pulse/direction closed loop control mode of precision DC servomotor I (9) in three kinds of interior analog or digital amounts, be that moment of torsion loading unit can be realized permanent angular deforming velocity, permanent moment of torsion loading speed and permanent coding are demarcated three kinds of load/unload modes of angular displacement speed, described stretching/compressing detects control section by accurate pull pressure sensor (16), accurate contact capacitance displacement sensor (32) and count photoelectric encoder (15) composition with the high line that precision DC servomotor II (17) is synchronized with the movement, can provide and comprise distortion angular speed, moment of torsion loading speed, scrambler demarcation angular displacement speed is the feedback signal source as pulse/direction closed loop control mode of precision DC servomotor II (17) in three kinds of interior analog or digital amounts, be that tension and compression loading unit can be realized permanent rate of deformation, permanent loading speed and permanent coding are demarcated three kinds of load/unload modes of rate of displacement,Described clamping and linkage unit comprise test specimen (37), clamp body I (12), clamp body II (13), and the upper lower platen of described test specimen (37) by clamp body I, II (12,13) and screw are to compress mode positioning clamping.
- Original position according to claim 1 draw/press-reverse combined load material Micromechanics test platform, it is characterized in that: described moment of torsion loading unit comprises precision DC servomotor I (9), one-level worm screw I (5), first-stage worm gear I (4), second-stage worm gear I (1), second-stage worm I (43), torque sensor flange frame I (41), torque sensor flange frame II (44), clamp body I (12), described second-stage worm I (43) is arranged on test platform pedestal (40) with screw by bearing and bearing seat, torque sensor flange frame I (41) is supported by twist cell bearing I (3) and twist cell bearing seat I (2) and is fixing, precision DC servomotor I (9) is arranged on test platform pedestal (40) by motor flange dish I (6), the twice-enveloping type worm couple I that is 1:50 through reduction gear ratio is slowed down, increase square, moment of torsion is passed through to torque sensor flange frame I, II (41, 44) and accurate torque sensor (7) be loaded on test specimen (37), described twice-enveloping type worm couple I is made up of the second-stage worm gear I (1) cooperatively interacting, second-stage worm I (43) and first-stage worm gear I (4), one-level worm screw I (5).
- Original position according to claim 1 draw/press-reverse combined load material Micromechanics test platform, it is characterized in that: described tension and compression loading unit comprises precision DC servomotor II (17), precision ball screw nut pedestal (30), precise ball line slideway (19), precise ball straight-line guide rail slide block (33), precise linear guide (31), pull pressure sensor planker (14), clamp body II (13), and by the one-level worm screw II (22) cooperatively interacting, first-stage worm gear II (23), second-stage worm II (26), the twice-enveloping type worm couple II that second-stage worm gear II (27) forms, by precision ball screw fixed pedestal I (20), precision ball screw (29), the precise ball screw pair that precise ball guide rail base II (47) forms, is wherein arranged on the twice-enveloping type worm couple II that the precision DC servomotor II (17) in motor flange dish II (21) is 1:50 by reduction gear ratio and slows down, increase square, its worm couple is by second-stage worm bearing seat I, II (24, 28) be arranged on test platform pedestal (40) above, moment of torsion slows down and exports straight-line displacement, pull pressure sensor pedestal (18) by feed screw nut through the precise ball screw pair being arranged on pedestal, accurate pull pressure sensor (16), precision ball screw nut pedestal (30) is arranged on respectively on feed screw nut, in the precise ball line slideway auxiliary being made up of precise ball line slideway (19) and precision ball screw nut pedestal (30) and the location of precise linear guide (31), under guide effect, Tensile or Compressive Loading is loaded on to test specimen (37).
- Original position according to claim 1 draw/press-reverse combined load material Micromechanics test platform, it is characterized in that: the high line of described moment of torsion detection control section is counted photoelectric encoder I (11) and is arranged on precision DC servomotor I (9) tail end, accurate torque sensor (7) by two ends flange connect between torque sensor flange frame I (41) and accurate circle grating scale (8) to transmit and measurement moment of torsion, circle grating reading head (39) passes through groove location and installation on test platform pedestal (40), and can adjust with the distance of precision circle grating scale (8) to reach optimum detection effect, the high line of stretching/compressing detection control section is counted photoelectric encoder II (15) and is arranged on precision DC servomotor II (17) tail end, and accurate pull pressure sensor (16) is arranged between pull pressure sensor pedestal (18) and pull pressure sensor planker (14).
- According to the original position described in claim 1 to 4 any one draw/press-reverse combined load material Micromechanics test platform, it is characterized in that: described original position draws/presses-and the size of main body that reverses combined load material Micromechanics test platform is 266mm × 100mm × 72mm, has X-ray diffraction (XRD) passage (36) on test platform pedestal (40).
- Original position according to claim 1 and 2 draw/press-reverse combined load material Micromechanics test platform, it is characterized in that: the support of described moment of torsion loading unit and locating device comprise twist cell bearing seat I, II (2, 38), twist cell bearing I, II (3, 10), motor flange dish I (6), second-stage worm bearing seat III (42), described twist cell bearing seat II (38) and twist cell bearing II (10) are born the Tensile or Compressive Loading from torque sensor flange frame II (44), make accurate torque sensor (7) only bear not Tensile/compressive load of moment of torsion.
- According to the original position described in claim 1 or 3 draw/press-reverse combined load material Micromechanics test platform, it is characterized in that: the support of described tension and compression loading unit and locating device comprise pull pressure sensor planker (14), precise linear guide (31), pull pressure sensor pedestal (18), motor flange dish II (21), second-stage worm bearing seat I (24), second-stage worm bearing I (25), second-stage worm bearing seat II (28), be passed to the torque load of pull pressure sensor planker (14) through clamp body II (13), born by planker both sides precise linear guides (31), and keep the degree of freedom of test specimen axis direction, making accurate pull pressure sensor (16) only bear stretching/compressing load not affected by torque load.
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