CN205981862U - Tensile nanometer indentation testing arrangement under four -point bending pre -loading - Google Patents

Tensile nanometer indentation testing arrangement under four -point bending pre -loading Download PDF

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Publication number
CN205981862U
CN205981862U CN201620779522.0U CN201620779522U CN205981862U CN 205981862 U CN205981862 U CN 205981862U CN 201620779522 U CN201620779522 U CN 201620779522U CN 205981862 U CN205981862 U CN 205981862U
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China
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test
displacement
bending
platform
point bending
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Expired - Fee Related
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CN201620779522.0U
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Chinese (zh)
Inventor
崔利娜
尤元
关常君
邵珠超
李�瑞
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Changchun University of Technology
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Changchun University of Technology
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Abstract

The utility model discloses a tensile nanometer indentation testing arrangement under four -point bending pre -loading, the utility model discloses integrateed pure tensile testing, pure four -point bending test and based on the compound load testing of two kind above -mentioned single load forms, is the while stretch the nanometer that has integrateed on four -point bending basis indentation accredited testing organization. Test platform is by tensile pre -loading actuation transmission unit of precision and detection centre gripping unit, constitutions such as accurate four -point bending pre -loading actuation transmission unit and centre gripping detecting element. Normal position nanometer indentation accredited testing organization includes constitutions such as XYZ direction displacement platform, piezoelectric stack, flexible hinge, pressure sensor, displacement sensor and diamond penetrator supporting rod. The utility model discloses small, compact structure can develop experimental test under optical microscope's real -time microscopy observation. And the compound test of accessible normal position stretch bending obtains the mechanical property parameter of material, carries out the normal position monitoring to microdeformation, damage and the breaking -down process of material.

Description

Stretching-four-point bending preloads lower nanoindentation test device
Technical field
This utility model is related to field of in-situ mechanical property test, preloads down particularly to a kind of stretching-four-point bending Nanoindentation test device.Can be used as pure extension load maintainer, pure four-point bending load maintainer, in-situ nano impression test mechanism Trans-scale in-situ material properties test platform be independently operated, and can also carry out multiple load Combined Loading simultaneously simultaneously.
Background technology
Various materials and its product, working environment during service is all more complicated, by single load situation simultaneously Rare, more in the case of be subject to be multiple physical field and multiple load collective effect.Because material is subject to combined load Effect, often not up to operating limit, damage inactivation will occur.So, develop when material is subject to multiple load collective effect, The instrument that its Micro Mechanical Properties can be carried out with in-situ test is extremely important.Most mechanics testing machines are all in the market It is the ex situ universal testing machine for structural material, once test can only realize a kind of loading of load, can only remember in test The load of record test specimen and shift value, the microscopic appearance change for test specimen then lacks record.And existing in-situ test instrument, mostly Number only has the test function of single load, and such as original position stretching tester, in-situ nano-indentation tester and in situ bending are surveyed Examination instrument etc., the nano-indenter test instrument under combined load is rarely reported, and lacks effective mechanics parameter test accuracy simultaneously and comments Determine method.In general, in use, the subject matter exposing has existing test instrunment:It is test result first Repeatability is bad, the problems such as dispersibility is big;Next to that the single function of test device loads and many physics it is impossible to meet multi-load The demand of field, is unfavorable for Function Extension;Finally, test instrunment is not to new structural material and advanced function testing of materials ability Foot.
Because the impression test instrument under combined load is fewer, so being directed to material at present both at home and abroad under preloading Impression test test is also fewer, but in actual condition uses, surveys in the urgent need to the micro-nano impression under this preloading Test instrument.Because this combined load loads, can truly reflect stress under actual condition for the material, simultaneously to profit Use in-situ observation instrument, the testing experiment platform of the Mechanical test results of real-time monitored material is also extremely important.
Therefore exploitation design is a kind of stretching-the bending mutually compatible with micro-imaging equipment can preload lower nano impress survey Test instrument, carries out in-situ monitoring to the microdeformation of material, damage and fracture process, for disclosing power under nanoscale for the material Learn characteristic and damage mechanisms provide method of testing.
Content of the invention
The purpose of this utility model is to provide a kind of stretching-four-point bending to preload lower nanoindentation test device, this Utility model solves the problems referred to above of prior art presence.This test instrunment is integrated with pure extension test, pure four-point bending is surveyed Examination and the test of the combined load based on above two single load form, are integrated with the basis of stretching-four-point bending simultaneously and receive Rice impression test mechanism.Test platform preloads driving gear unit and detection grip unit by accurate stretching;Accurate 4 points curved Song preloads the composition such as driving gear unit and clamping detector unit.In-situ nano impression test mechanism includes high accuracy XYZ side To displacement platform, piezoelectric stack, flexible hinge, high-accuracy pressure transducer, high accuracy displacement sensor and diamond penetrator folder Hold the composition such as bar.Test instrunment small volume, compact conformation, and above-mentioned examination can be carried out under the real-time microscopic observation of optical microscope Test tries.And can by original position stretch bending composite test obtain material mechanical property parameters, including elastic modelling quantity, tensile strength, Bending strength and hardness etc., carry out in-situ monitoring to the microdeformation of material, damage and fracture process, for disclosing material in nanometer Mechanical characteristic under yardstick and damage mechanisms provide method of testing.
Above-mentioned purpose of the present utility model is achieved through the following technical solutions:
This utility model includes that stretching preloads load maintainer, four-point bending preloads load maintainer and in-situ nano pressure Trace mechanism for testing.
The precision DC servomotor that described stretching preloads in load maintainer is fixedly mounted on test by ring flange On platform base, form primary speed-down and commutation with worm couple II.Two-way ball guide screw nat is by worm couple II Convert rotational motion be synchronous bidirectional linear motion, and then drive and be arranged on piece fixture support base I He above pair of nut Fixture support base II realizes synchronous bidirectional linear motion, and piece fixture support base I and fixture support base II are arranged on following drawing Stretch on mechanism's line slideway, wherein fixture II is connected by connecting T-shaped block with drawing mechanism force transducer, connecting T-shaped block is installed On decussation roller guide rail.The fixture I of two test specimens and fixture II are respectively and fixedly installed to corresponding piece fixture support base I He On fixture support base II, thus test specimen two ends are applied with tensile force ensure that test specimen center is motionless;Stretching displacement detection be by The displacement of stretching displacement sensor measured material support base II is realized.
It is solid that the bending mechanism AC servo motor that described four-point bending preloads in load maintainer passes through motor flange disk Dingan County is contained on test platform pedestal, forms primary speed-down and commutation with worm-gears I, and worm gear is arranged on bending mechanism leading screw On unidirectional screw pair in fixed seat, then pass through the convert rotational motion of unidirectional feed screw nut adjutant's worm couple I For unidirectional linear motion, the bending mechanism force transducer in guide rail connected unit and four-point bending pressure head is driven to do reciprocating linear fortune Dynamic, wherein force transducer is connected by contiguous block with four-point bending pressure head.Bending mechanism line slideway is arranged on guide rail connected unit On, by the linear reciprocating motion of four-point bending pressure head, realize the bending loading and unloading to test specimen.Bending displacement detection be by The bending displacement sensor being arranged on displacement sensor bracket passes through to measure the displacement realization of displacement transducer baffle plate.
Described bending preloads load maintainer and adopts four-point bending pressure head, realize fixed to the two ends of sample 4 points curved Bent loading.
Described in-situ nano impression test mechanism include the electronic fine setting slide unit of XYZ tri- axle, piezoelectric stack, flexible hinge, Pressure transducer, displacement transducer and diamond penetrator supporting rod.
Described in-situ nano impression test mechanism makes diamond by adjusting XYZ fine setting mobile platform in test process Pressure head is located at optimum distance before press-in.Power and displacement are passed to pressure by the flexible hinge being arranged on connecting plate by piezoelectric stack Force transducer, the diamond penetrator supporting rod that pressure transducer connects drives diamond penetrator press-in, finally realizes pressure head press-in Sample testing.There is between pressure transducer and diamond penetrator supporting rod connection baffle plate, pass through measurement using displacement transducer The displacement deformation connecting baffle plate measures the displacement of pressure head indirectly, that is, draw the compression distance of diamond penetrator, realize micrometric displacement Signal detection.Flexible hinge and L-type contiguous block are arranged on Z axis displacement platform, and displacement transducer is clamped by L-type contiguous block.
Described in-situ nano impression test mechanism adopts the electronic fine setting slide unit of XYZ tri- axle, and it is by electronic Mobile Slide With XYZ manual fine-tuning platform composition, wherein XYZ manual fine-tuning platform is again by X-axis mobile platform, Y-axis mobile platform, Z axis movement Platform and connects bearing composition, electronic Mobile Slide is using the step motor drive creasing mechanism leading screw being arranged on platform base Convert rotational motion is in line motion by the feed screw nut assembly in fixed seat, and wherein precise linear guide play the guiding role.? When carrying out in-situ observation, manual for XYZ platform and connection unit thereon are removed by a segment distance by motor Mobile Slide, will show Micro mirror alignment lenses sample carries out the observation under stretch bending.XYZ manual fine-tuning platform is installed on electronic slid platform base, to connection thereon Parts carry out manual displacement regulation, the displacement in tri- directions of fine adjustment XYZ, to utilize pressure head in test specimen diverse location Do associated indentation experiment.
Described stretching-four-point bending preloads lower nanoindentation test device, is integrally divided into the three-dimensional cloth of Dual-layer Put mode, in-situ nano impression test mechanism is located on stretching-four-point bending load maintainer, realize the stretching to sample and survey Examination, four-point bending test, impression test and its Combined Loading test.
The beneficial effects of the utility model are:
Possess the functions such as extension test, crooked test, impression test and combined load test.Extension test function is mainly real The extension test of existing material, obtains the mechanical property parameters such as elastic modelling quantity, yield strength and the tensile strength of material.Bending is surveyed Examination function mainly realizes the four-point bending test of material, obtains bending strength, elastic modelling quantity and fracture strength of material etc. important Parameter.Impression test function mainly realizes the impression test of material, obtains the mechanical properties such as elastic modelling quantity, the hardness of material ginseng Number.Combined load test function is also to obtain the mechanical property parameters such as elastic modelling quantity, the hardness of material.This test instrunment is related to machine Electrical integrated precision scientific instrument field, major advantage is small volume, compact conformation, can be used for precise materials micro-nano stretching- Bending compound mechanics performance test and in-situ nano impression test.
Brief description
Fig. 1 is perspective view of the present utility model.
Fig. 2 is schematic top plan view of the present utility model.
Fig. 3 is front-view schematic diagram of the present utility model.
Fig. 4 is that the right side of the present utility model regards schematic diagram.
In figure:1st, pedestal;2nd, bending mechanism AC servo motor;3rd, motor flange disk;4th, worm couple I;5th, bend Displacement transducer;6th, displacement sensor bracket;7th, bending mechanism leading screw fixed seat;9th, guide rail connected unit;10th, bending mechanism power passes Sensor;11st, displacement transducer baffle plate;12nd, contiguous block;13rd, fixture I;14th, fixture support base I;15th, pressure transducer;16th, soft Property hinge;17th, L-type contiguous block;18th, Z axis displacement platform;19th, connecting plate;20th, Z axis mobile platform;21st, connects bearing;22、Y Axle mobile platform;23rd, X-axis mobile platform;24th, electronic slid platform base;25th, creasing mechanism leading screw fixed seat;26th, accurate straight line is led Rail;27th, motor;28th, platform base;29th, drawing mechanism line slideway;30th, fixture support base II;31st, drawing mechanism power Sensor;32nd, connecting T-shaped block;33rd, decussation roller guide rail;34th, fixture II;35th, four-point bending pressure head;36th, precision DC servo Motor;37th, two-way ball guide screw nat;38th, ring flange;39th, worm couple II;40th, stretching displacement sensor;43rd, silk Thick stick nut assembly;44th, piezoelectric stack;45th, displacement transducer;46th, connect baffle plate;47th, diamond penetrator supporting rod;48th, unidirectional Screw pair;49th, bending mechanism line slideway.
Specific embodiment
Referring to shown in Fig. 1 to Fig. 4, this utility model includes that stretching preloads load maintainer, four-point bending preloads loading Mechanism and in-situ nano impression test mechanism.
The precision DC servomotor 36 that described stretching preloads in load maintainer is fixedly mounted on by ring flange 38 On test platform pedestal 1, form primary speed-down and commutation with worm couple II 39.Two-way ball guide screw nat 37 is by worm gear The convert rotational motion of worm gear pair II 39 moves along a straight line for synchronous bidirectional, and then drives the piece fixture being arranged on above pair of nut Support base I 14 and fixture support base II 30 realize synchronous bidirectional linear motion, piece fixture support base I 14 and fixture support base II 30 are arranged on following drawing mechanism line slideway 29, and wherein fixture II 34 passes through to be connected T with drawing mechanism force transducer 31 Type block 32 connects, and connecting T-shaped block 32 is arranged on decussation roller guide rail 33.The fixture I 13 of two test specimens and fixture II 34 are respectively It is fixedly mounted on corresponding piece fixture support base I 14 and fixture support base II 30, thus tensile force is applied to test specimen two ends Ensure that test specimen center is motionless;Stretching displacement detection is by the displacement of stretching displacement sensor 40 measured material support base II 30 Realize.
The bending mechanism AC servo motor 2 that described four-point bending preloads in load maintainer passes through motor flange disk 3 It is fixedly mounted on test platform pedestal 1, forms primary speed-down and commutation with worm-gears I 4, worm gear is arranged on bending mechanism On unidirectional screw pair 48 in leading screw fixed seat 7, then by unidirectional screw pair 48 by the rotation of worm couple I 4 Transhipment is dynamic to be converted into unidirectional linear motion, drives the bending mechanism force transducer 10 in guide rail connected unit 9 and four-point bending pressure head 35 do linear reciprocating motion, and wherein bending mechanism force transducer 10 is connected by contiguous block 12 with four-point bending pressure head 35.Bending Mechanism's line slideway 49 is arranged in guide rail connected unit 9, by the linear reciprocating motion of four-point bending pressure head 35, realizes to test specimen Bending loading and unloading.Bending displacement detection is to be passed through by the bending displacement sensor 5 being arranged on displacement sensor bracket 6 The displacement of measurement displacement transducer baffle plate 11 is realized.
Described bending preloads load maintainer and adopts four-point bending pressure head 35, realizes at fixed to the two ends of sample 4 points Bending loads.
Described in-situ nano impression test mechanism includes the electronic fine setting slide unit of XYZ tri- axle, piezoelectric stack 44, flexible hinge 16th, pressure transducer 15, displacement transducer 45 and diamond penetrator supporting rod 47.
Described in-situ nano impression test mechanism makes diamond by adjusting XYZ fine setting mobile platform in test process Pressure head is located at optimum distance before press-in.Power and displacement are passed by piezoelectric stack 44 by the flexible hinge 16 being arranged on connecting plate 19 Pass pressure transducer 15, the diamond penetrator supporting rod 47 that pressure transducer 15 connects drives diamond penetrator press-in, finally Realize the test of pressure head pressing in sample.There is between pressure transducer 15 and diamond penetrator supporting rod 47 connection baffle plate 46, utilize Displacement transducer 45 measures the displacement of pressure head indirectly by the displacement deformation that measurement connects baffle plate 46, that is, draw diamond penetrator Compression distance, realize micrometric displacement signal detection.Flexible hinge 16 and L-type contiguous block 17 are arranged on Z axis displacement platform 18, position Displacement sensor 45 is clamped by L-type contiguous block 17.
Described in-situ nano impression test mechanism adopts the electronic fine setting slide unit of XYZ tri- axle, and it is by electronic Mobile Slide With XYZ manual fine-tuning platform composition, wherein XYZ manual fine-tuning platform is again by X-axis mobile platform 23, Y-axis mobile platform 22, Z axis Mobile platform 20 and connects bearing 21 form, and electronic Mobile Slide is driven using the motor 27 being arranged on platform base 28 Convert rotational motion is in line motion by the feed screw nut assembly 43 in creasing mechanism leading screw fixed seat 25, and wherein accurate straight line is led Rail 26 play the guiding role.When carrying out in-situ observation, by motor Mobile Slide by manual for XYZ platform and connection unit thereon Remove a segment distance, microscope alignment lenses sample is carried out the observation under stretch bending.XYZ is installed on electronic slid platform base 24 manual Fine adjustment stage, carries out manual displacement regulation to connecting parts thereon, the displacement in tri- directions of fine adjustment XYZ, so that Test specimen diverse location does associated indentation experiment using pressure head.
Described stretching-four-point bending preloads lower nanoindentation test device, is integrally divided into the three-dimensional cloth of Dual-layer Put mode, in-situ nano impression test mechanism is located on stretching-four-point bending load maintainer, realize the stretching to sample and survey Examination, four-point bending test, impression test and its Combined Loading test.

Claims (1)

1. a kind of stretching-four-point bending preload lower nanoindentation test device it is characterised in that:Preload loading including stretching Mechanism, four-point bending preload load maintainer and in-situ nano impression test mechanism;
The precision DC servomotor (36) that described stretching preloads in load maintainer is fixedly mounted on by ring flange (38) On test platform pedestal (1), form primary speed-down and commutation with worm couple II (39);Two-way ball guide screw nat (37) The convert rotational motion of worm couple II (39) is moved along a straight line for synchronous bidirectional, and then drive is arranged on above pair of nut Piece fixture support base I (14) and fixture support base II (30) realize synchronous bidirectional linear motion, piece fixture support base I (14) It is arranged on following drawing mechanism line slideway (29) with fixture support base II (30), wherein fixture II (34) and drawing mechanism Force transducer (31) passes through connecting T-shaped block (32) and connects, and connecting T-shaped block (32) is arranged on decussation roller guide rail (33);Two The fixture I (13) of test specimen and fixture II (34) are respectively and fixedly installed to corresponding piece fixture support base I (14) and fixture support On seat II (30), thus test specimen two ends are applied with tensile force ensure that test specimen center is motionless;Stretching displacement detection is by stretching The displacement of displacement transducer (40) measured material support base II (30) is realized;
The bending mechanism AC servo motor (2) that described four-point bending preloads in load maintainer passes through motor flange disk (3) It is fixedly mounted on test platform pedestal (1), forms primary speed-down and commutation with worm-gears I (4), worm gear is arranged on bending On unidirectional screw pair (48) in mechanism's leading screw snail fixed seat (7), then pass through unidirectional screw pair (48) by worm gear The convert rotational motion of worm gear pair I 4 is unidirectional linear motion, drives the bending mechanism force transducer in guide rail connected unit (9) And four-point bending pressure head (35) does linear reciprocating motion, wherein bending mechanism force transducer (10) and four-point bending pressure head (10) (35) pass through contiguous block (12) to be connected;Bending mechanism line slideway (49) is arranged in guide rail connected unit (9), by four-point bending The linear reciprocating motion of pressure head (35), realizes the bending loading and unloading to test specimen;Bending displacement detection is by being arranged on displacement Bending displacement snail sensor (5) on sensor stand (6) is passed through to measure the displacement realization of displacement transducer baffle plate (11);
Described bending preloads load maintainer and adopts four-point bending pressure head (35), realize fixed to the two ends of sample 4 points curved Bent loading;
Described in-situ nano impression test mechanism includes the electronic fine setting slide unit of XYZ tri- axle, piezoelectric stack (44), flexible hinge (16), pressure transducer (15), displacement transducer (45) and diamond penetrator supporting rod (47);
Described in-situ nano impression test mechanism makes diamond penetrator by adjusting XYZ fine setting mobile platform in test process It is located at optimum distance before press-in;Piezoelectric stack (44) is by the flexible hinge (16) that is arranged on connecting plate (19) by power and displacement Pass to pressure transducer (15), the diamond penetrator supporting rod (47) that pressure transducer (15) connects drives diamond penetrator pressure Enter, finally realize the test of pressure head pressing in sample;Between pressure transducer (15) and diamond penetrator supporting rod (47), there is connection Baffle plate (46), indirectly measures the position of pressure head using the displacement deformation that displacement transducer (45) passes through measurement connection baffle plate (46) Move, that is, draw the compression distance of diamond penetrator, realize micrometric displacement signal detection;Flexible hinge (16) and L-type contiguous block (17) It is arranged on Z axis displacement platform (18), displacement transducer (45) passes through L-type contiguous block (17) and clamps;
Described in-situ nano impression test mechanism adopts the electronic fine setting slide unit of XYZ tri- axle, and it is by electronic Mobile Slide and XYZ Manual fine-tuning platform forms, and wherein XYZ manual fine-tuning platform is moved by X-axis mobile platform (23), Y-axis mobile platform (22), Z axis again Moving platform (20) and connects bearing (21) composition, electronic Mobile Slide is using the motor being arranged on platform base (28) (27) drive feed screw nut assembly (43) on creasing mechanism leading screw fixed seat (25) that convert rotational motion is in line motion, its Middle precise linear guide (26) play the guiding role;When carrying out in-situ observation, by motor Mobile Slide by manual for XYZ platform and Connection unit thereon removes a segment distance, microscope alignment lenses sample is carried out the observation under stretch bending;Electronic slid platform base (24) parts connecting thereon are carried out manual displacement regulation, fine adjustment XYZ tri- by upper installation XYZ manual fine-tuning platform The displacement in direction, to do associated indentation experiment in test specimen diverse location using pressure head;
In-situ nano impression test mechanism is located on stretching-four-point bending load maintainer, realization to the extension test of sample, four Point crooked test, impression test and its Combined Loading test.
CN201620779522.0U 2016-07-25 2016-07-25 Tensile nanometer indentation testing arrangement under four -point bending pre -loading Expired - Fee Related CN205981862U (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105973694A (en) * 2016-07-25 2016-09-28 长春工业大学 Nano indentation testing device under stretch-four-point bending preload
CN110261228A (en) * 2019-07-29 2019-09-20 常州大学 A kind of complex multi-dimensional mechanical loading unit
CN112014237A (en) * 2020-09-07 2020-12-01 山东大学 Device and method for preparing cement stone microscopic sample and testing bending tensile strength
CN112326422A (en) * 2020-10-16 2021-02-05 北京航空航天大学 In-situ mechanical property testing platform based on optical microscope

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105973694A (en) * 2016-07-25 2016-09-28 长春工业大学 Nano indentation testing device under stretch-four-point bending preload
CN110261228A (en) * 2019-07-29 2019-09-20 常州大学 A kind of complex multi-dimensional mechanical loading unit
CN112014237A (en) * 2020-09-07 2020-12-01 山东大学 Device and method for preparing cement stone microscopic sample and testing bending tensile strength
CN112326422A (en) * 2020-10-16 2021-02-05 北京航空航天大学 In-situ mechanical property testing platform based on optical microscope

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