CN203405370U - Material micromechanics performance testing platform under stretching, bending and twisting loads - Google Patents
Material micromechanics performance testing platform under stretching, bending and twisting loads Download PDFInfo
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- CN203405370U CN203405370U CN201320461089.2U CN201320461089U CN203405370U CN 203405370 U CN203405370 U CN 203405370U CN 201320461089 U CN201320461089 U CN 201320461089U CN 203405370 U CN203405370 U CN 203405370U
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Abstract
The utility model relates to a material micromechanics performance testing platform under stretching, bending and twisting loads, belonging to the electromechanical field. The material micromechanics performance testing platform comprises a tensioning-compressing module, a bending module, a twisting module, a control detection module and a test piece clamping module, wherein the testing platform takes the tensioning-compressing module as a basic function module, the twisting module is arranged at one end of the tensioning-compressing module, the test piece clamping module is arranged on the tensioning-compressing module, and the bending module is independently arranged on one side of a portal frame. The material micromechanics performance testing platform can serve as a material micromechanics performance testing device in an independent stretching/compressing mode, independent bending mode or an independent twisting mode, that is, a single load testing mode, and also can be used for material micromechanics performance testing of the twisting load under a given stretching/compressing stress level or material micromechanics performance testing of the bending load under the given stretching/compressing stress level, that is, a combined load testing mode; the control detection module can collect a load/displacement signal to detect a stress strain process of the material under the combined load action.
Description
Technical field
The utility model relates to dynamo-electric field, particularly the material Micro Mechanical Properties test platform under a kind of stretching-bending-torsion multi-load.The utility model can be used as independent stretching/compressing mode or independent beam mode or independent torsional type material Mechanics Performance Testing device, i.e. single load test pattern; Also can be used as the material mechanical performance test of the torsional load under given stretching/compressing stress level or the material mechanical performance test of the bending load under given stretching/compressing stress level, i.e. combined load test pattern.By controlling the collection of detection module to load/displacement signal, can the ess-strain process of test material under Action of Combined Loads.The research that the mode that applies of two kinds of combined loads is Mechanical Properties of Materials provides new method.
Background technology
Traditional material mechanical performance method of testing is pulling method, compression method, torsional technique, bending method etc., is all to belong to the various mechanical property parameters of measuring material under single load pattern.The various parameters of measuring are all the results under single load, and with actual application in the complex load that bears of part inconsistent, and then make result not there is general cogency.And along with the development of modern science and technology, performance requirement to physical construction is more and more higher, physical construction is subject to the comprehensive mechanical property of Action of Combined Loads and is paid close attention to widely in actual condition, and the mode that applies of its load and measuring method be continuous Change and Development also.
The material Micro Mechanical Properties test platform that stretches-crooked-reverse under multi-load refers to that test specimen is under two or more load, and the distortion material under load being occurred by external control detecting instrument, damage are until the process of failure damage is carried out a kind of mechanical test technology of dynamic monitoring.In Mechanics Performance Testing, the parameters such as tension/curved intensity, elastic modulus, shear modulus, yield limit twisting strength have been embodied a concentrated reflection of the combination property of material.Combined load test can disclose the deformation damage rule of material under the extraneous load of reality, compares with single load test, can find new phenomenon and rule, is more conducive to the mechanical behavior of research material.
At present, the material Micro Mechanical Properties test platform that stretches-crooked-reverse under multi-load is rarely found at home, research observation method is still immature, is in particular in: the synchronism that 1, combined load applies in process is difficult to guarantee, and needs the mutual coupling between various load.2, the control detecting instrument in test process can be subject to the impact of all the other load as all kinds sensor, scrambler, driver etc., and measuring accuracy is difficult to guarantee.3, the layout of device medium power element and actuated element can affect whole dimensional structure, is also related to the size shape of measuring test specimen.4, the fixture of clamping test specimen need to be considered the effect of tension-torsion combined load, wants Bending load simultaneously, and jig Design difficulty is larger.In sum, design a structure ingenious, the material mechanical performance proving installation under the high combined load condition of measuring accuracy comes the mechanical property under test material combined action very necessary.
Summary of the invention
The purpose of this utility model is to provide the material Micro Mechanical Properties test platform under a kind of stretching-bending-torsion multi-load, has solved the problems referred to above that prior art exists.The utility model can integrated stretching/compressing test, crooked test, torsion test and the test of the combined load based on above-mentioned two kinds of single load forms.Proving installation is comprised of tension and compression module, crooked module, torsion module, control detection module, test specimen clamping module.This proving installation structure is ingenious, can be under combined load pattern the various comprehensive mechanical properties of test material.Can realize the Mechanics Performance Testing of material under tension and compression bending combined load pattern and goods thereof, the test of draw/press-bending combined load, draws/presses and turn round combined load and test, and also can realize Mechanics Performance Testing under tension and compression bending single load.
Above-mentioned purpose of the present utility model is achieved through the following technical solutions:
The material Micro Mechanical Properties test platform that stretches-crooked-reverse under multi-load, comprise tension and compression module, crooked module, reverse module, control detection module, test specimen clamping module, test platform be take tension and compression module as basic function module, reverse module arrangement in tension and compression module one end, its function can be separate or associated with tension and compression functions of modules, test specimen clamping module arrangement is in tension and compression module, crooked module is independently arranged in portal frame 2 one sides on test platform, function and tension and compression module are separate, control detection module and are distributed in each functional module;
Described tension and compression module is: direct current generator 4 drives worm screw I 8 to rotate, worm screw I 8 drives worm gear I 7 to rotate, worm screw II 10 drives worm gear II 12 to rotate, outputting power rotates two-way ball-screw 11, be arranged in two end supports seat in linear rolling track I 22 from or move toward one another, realize the stretching of test specimen or compression; Photoelectric encoder 3 is controlled the rotating speed size and Orientation of direct current generator 4, supports the taper roll bearing I 9 of worm shaft II 33 and bears the suffered axial force of worm screw, and two-way ball-screw 11 makes test specimen carry out two-direction pull press, guarantees the suffered load of test specimen symmetrically;
Described crooked module is: stepper motor II 23 is connected with ball-screw 27 by motor flange III 24, flexible coupling I 25, feed screw nut I 28 drives the supporting seat IV 35 being arranged in guide rail II 34 to move up and down, pressure head 31 moves down the bending load realizing test specimen, the size and Orientation of stepper motor driver control step motor II 23 rotating speeds;
Described torsion module is: stepper motor I 17 driven gear II 19 are rotated, gear I 18 and 19 engagements of gear II, gear I 18 is arranged on axle 43, flexible coupling III 42 coupling shafts 43 and torque sensor 47, flexible coupling II 40 connects torque sensor 47 and fixture stationary shaft I 50, torque sensor 47 is fixed on sensor holder 41, fixture stationary shaft I 50 is arranged in supporting seat VI 48 by flange bearing I, II 58,59, together with fixture lower platen I 51 is bolted with fixture stationary shaft I 50;
Described control detection module comprises pull pressure sensor 15, pressure transducer 30, torque sensor 47, linear grating chi 37, circle grating 49, photoelectric encoder 3 and stepper motor driver, pull pressure sensor 15 is connected with supporting seat I 14 by bolt one end, the other end is connected with fixture support seat 16, fixture support seat 16 is arranged on supporting guide 54, when test specimen is subject to torsional load, fixture support seat is delivered to torsional load on supporting guide 54, thereby avoids pull pressure sensor 15 to be subject to the impact of torsional load; Torque sensor 47 two ends are connected with fixture stationary shaft I 50 with axle 43 respectively by flexible coupling II, III 40,42, supporting seat VI 48 inside are provided with flange bearing I, II 58,59, bear axial load, avoid the impact of tensile load on torque sensor 47;
Described test specimen clamping module comprises fixture lower platen I, II 51,53 and fixture top board 52, fixture lower platen 51 is fixed by screws in clamp shaft 50, fixture lower platen 53 is fixed by screws on fixture support seat 16, the upper and lower pressing plate of fixture is bolted, and realizes the clamping to test specimen.
Described pull pressure sensor 15 is arranged between the fixture support seat 16 and supporting seat I 14 on linear rolling track 22, be connected by screw, fixture support seat 16 is fixed by screws on supporting guide 54, and supporting guide 54 is fixed by screws in supporting seat I 14.
Described round grating 49 is enclosed within the fixture stationary shaft I 50 being connected with torque sensor 47, and biting connecions fixture and fixture stationary shaft I 50 be connected by screw, and circle grating 49 is measured torsion angle displacements.
Described pressure transducer 30 one end are connected with pressure head 31, and the other end is connected with supporting seat IV 35 by screw, and 31 pairs of test specimens of pressure head apply bending force, and the size of bending force records by pressure transducer 30.
Described biting connecions fixture is comprised of the upper and lower pressing plate of fixture of a pair of biting connecions, fixture lower platen is fixed by square groove with fixture stationary shaft I 50 and fixture support seat 16 respectively, and connect by clamp body attachment screw, test specimen is right cylinder revolving structure, by the upper and lower pressing plate of biting connecions fixture with laciniation, in compression mode, clamps.
Described two-way ball-screw 11 is the two-way leading screw of left-right rotary, left and right stretching worktable midplane extrusion in drawing process, and sample focus target point position immobilizes.
Described pull pressure sensor 15 is accurate S type sensor.
Described crooked force sensor 30 is accurate S type sensor.
The beneficial effects of the utility model are:
1. the utility model is novel, compact overall structure, adopt three motors as the power source of three modules, three kinds of load of tension and compression bending are applied by three kinds of standalone modules respectively, the interference each other of being not only related but also having avoided between three modules, is subject to force mode under the combined load of simulation material to the full extent.Adopt gantry as fixed support, take full advantage of the space of proving installation.
2. three power sources of the present utility model can carry out by photoelectric encoder or driver the adjusting of output speed and torque, can be in experimentation the ratio of control load size and different loads, can under single load, carry out Mechanics Performance Testing to material and goods thereof, also can under the combined loads such as stretch bending, tension-torsion, carry out Mechanics Performance Testing.
3. the utility model sensor placement is ingenious, pull pressure sensor is arranged in the top of supporting guide 54, the impact that can avoid torsional load to measure its tensile force, installs a pair of flange bearing between torque sensor and fixture, can avoid the impact of Tensile or Compressive Loading on its torque measurement.
4. the utility model jig Design is ingenious, adopt the form of lower platen on biting connecions, upper lower platen is bolted, with jagged upper lower platen, can fully guarantee the stability of clamping test pieces, the coupling part design of two fixtures in left and right is different, stretched portion adopts square connection, and reverse part adopts cylindrical connection, has fully guaranteed the accuracy of test specimen bearing load.
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 representation of the present utility model;
Fig. 2 is that schematic diagram is looked on a left side of the present utility model;
Fig. 3 is schematic rear view of the present utility model;
Fig. 4 is the local enlarged diagram of pressure detection part in the utility model tension and compression module;
Fig. 5 is the local enlarged diagram that the utility model reverses displacement test section in module;
Fig. 6 is the local enlarged diagram that the utility model reverses module;
Fig. 7 is the local enlarged diagram of the utility model test specimen clamping module.
In figure: 1. pedestal; 2. portal frame; 3. photoelectric encoder; 4. direct current generator; 5. motor base; 6. motor flange I; 7. worm gear I; 8. worm screw I; 9. taper roll bearing I; 10. worm screw II; 11. two-way ball-screws; 12. worm gear II; 13. leading screw holder I; 14. supporting seat I; 15. pull pressure sensor; 16. fixture support seats; 17. stepper motor I; 18. gear I; 19. gear II; 20. motor flange II; 21. supporting seat II; 22. guide rail I; 23. stepper motor II; 24. motor flange III; 25. flexible coupling I; 26. leading screw holder II; 27. ball-screws; 28. feed screw nuts; 29. supporting seat III; 30. pressure transducers; 31. pressure heads; 32. worm shaft I; 33. worm shaft II; 34. guide rail II; 35. supporting seat IV; 36. grating stators; 37. linear grating chis; 38. grating reading heads; 39. grating holders; 40. flexible coupling II; 41. sensor holders; 42. flexible coupling III; 43. axles; 44. hold-down nut I; 45. supporting seat V; 46. motor flange IV; 47. torque sensors; 48. supporting seat VI; 49. circle gratings; 50. fixture stationary shaft I; 51. fixture lower platen I; 52. fixture top boards; 53. fixture lower platen II; 54. supporting guides; 55. fixture stationary shaft II; 56. hold-down nut II; 57. taper roll bearing II; 58. flange bearing I; 59. flange bearing II; 60. circle grating reading heads.
Embodiment
Below in conjunction with accompanying drawing, further illustrate detailed content of the present utility model and embodiment thereof.
Referring to shown in Fig. 1 to Fig. 5, the material Micro Mechanical Properties test platform under stretching-bending-torsion multi-load of the present utility model, comprises tension and compression module, crooked module, reverses module, controls detection module, test specimen clamping module; Test platform be take tension and compression module as basic function module, reverse module arrangement in tension and compression module one end, its function can be separate or associated with tension and compression functions of modules, test specimen clamping module arrangement is in tension and compression module, crooked module is independently arranged in portal frame one side on test platform, function and tension and compression module are separate, control detection module and are distributed in each functional module.
Described tension and compression module is: the direct current generator 4 being fixed on motor base 5 drives worm screw I 8 to rotate, worm screw I 8 drives worm gear I 7 to rotate, worm screw II 10 drives worm gear II 12 to rotate, the two-way ball-screw 11 that outputting power makes to be arranged in leading screw holder I 13 rotates, drive be arranged in two end supports seat in linear rolling track I 22 from or move toward one another, realization is to the stretching of test specimen or compression, the rotating speed size and Orientation of photoelectric encoder 3 monitoring direct current generators 4, support the taper roll bearing I of worm shaft II 33, II 9, 57 bear the suffered axial force of worm screw, two-way ball-screw 11 makes test specimen carry out two-direction pull press, guarantee the suffered load of test specimen symmetrically,
Described crooked module is arranged on portal frame 2, stepper motor II 23 is connected with ball-screw 27 by motor flange III 24, flexible coupling I 25, leading screw holder II 26, feed screw nut 28 drives the supporting seat IV 35 being arranged in guide rail II 34 to move up and down, pressure head 31 moves down the bending load realizing test specimen, the size and Orientation of stepper motor driver control step motor II 23 rotating speeds;
Described torsion module is that stepper motor I 17 is arranged in motor flange IV 46, by flexible coupling driven gear II 19, rotate, gear II 19 is by hold-down nut I 44 axial location in supporting seat V 45, gear I 18 and 19 engagements of gear II, gear I 18 is arranged on axle 43, axle 43 is by motor flange II 20, flexible coupling III 42 coupling shafts 43 and torque sensor 47, flexible coupling II 40 connects torque sensor 47 and fixture stationary shaft I 50, torque sensor 47 is fixed on sensor holder 41, fixture stationary shaft I 50 is by flange bearing I 58, II 59 is arranged in supporting seat VI 48, together with fixture lower platen I 51 is bolted with fixture stationary shaft I 50, fixture,
Described control detection module comprises pull pressure sensor 15, pressure transducer 30, torque sensor 47, linear grating chi 37, circle grating 49, photoelectric encoder 3 and stepper motor driver, pull pressure sensor 15 is connected with supporting seat I 14 by bolt one end, the other end is connected with fixture support seat 16, fixture support seat 16 is arranged on supporting guide 54, when test specimen is subject to torsional load, fixture support seat is delivered to torsional load on supporting guide 54, thereby avoids pull pressure sensor 15 to be subject to the impact of torsional load; Torque sensor 47 two ends are connected with fixture stationary shaft I 50 with axle 43 respectively by flexible coupling III 42, II 40, and supporting seat VI 48 inside are provided with flange bearing I 58, II 59, bear axial load, avoid the impact of tensile load on torque sensor 47; Linear grating chi 37 is connected with grating stator 36, is arranged on grating holder 39;
Described test specimen clamping module comprises fixture lower platen 51,53 and fixture top board 52, fixture lower platen 51 is fixed by screws in fixture clamp shaft I, fixture lower platen 53 is fixed by screws in the square groove on fixture support seat 16 and is connected with fixture stationary shaft II 55, the upper and lower pressing plate of fixture is bolted, test specimen is right cylinder revolving structure, by the upper and lower pressing plate of biting connecions fixture with laciniation, in compression mode, clamps;
Described pull pressure sensor 15 is arranged between the fixture support seat 16 and supporting seat I on linear rolling track 22, by hold-down nut II 56, connect, fixture support seat 16 is fixed by screws on supporting guide 54, and supporting guide 54 is fixed by screws in supporting seat I 14;
Described round grating 49 is enclosed within the fixture stationary shaft I 50 being connected with torque sensor 47, and biting connecions fixture and fixture stationary shaft I 50 be connected by screw, and circle grating 49 is measured torsion angle displacements;
Described pressure transducer 30 one end are connected with pressure head 31, and the other end is connected with supporting seat IV 35 by screw, and 31 pairs of test specimens of pressure head apply bending force, and the size of bending force records by pressure transducer 30;
Described two-way ball-screw 11 is the two-way leading screw of left-right rotary, left and right stretching worktable midplane extrusion in drawing process, and sample focus target point position immobilizes, and for fixed point applies crooked transverse force, provides advantage;
Described pull pressure sensor 15 and crooked force sensor 30 are accurate S type sensor.
Referring to shown in Fig. 1 to Fig. 7, the achieved stretch bending combined load value-added tax function of material Micro Mechanical Properties test platform under stretching-bending-torsion multi-load of the present utility model relates to functional module and comprises that direct current generator 4, two-stage form than twice-enveloping type worm couple and precision ball screw pair of nut compared with big retarding; This two-stage consists of first-stage worm gear worm screw, second-stage worm gear worm screw than twice-enveloping type worm couple compared with big retarding; This direct current generator 4 is fixed on pedestal 1 by motor flange 6, and is connected with one-level worm screw by flexible coupling; This second-stage worm gear is connected with precision ball screw by spring coupling; Stepper motor 23, flexible coupling and precision ball screw 27 form; Stepper motor 23 is fixed on portal frame 2 by motor flange 24, and is connected with ball-screw 27 by flexible coupling.
Tension-torsion combined load value-added tax function relates to functional module and comprises that direct current generator 4, two-stage form than twice-enveloping type worm couple and ball-screw compared with big retarding; This two-stage consists of first-stage worm gear worm screw, second-stage worm gear worm screw than twice-enveloping type worm couple compared with big retarding; This direct current generator 4 is fixed on pedestal 1 by motor flange I 6, and is connected with one-level worm screw by flexible coupling; This second-stage worm gear is enclosed within ball-screw 11 ends; Stepper motor, flexible coupling and primary speed-down straight spur gear are secondary to be formed; Stepper motor is fixed on pedestal 1 by motor flange 20 II, and is connected with the axle that gear 18 I are installed by flexible coupling.
Referring to Fig. 1 to Fig. 7, the involved concrete model of components and parts of material Micro Mechanical Properties test platform under stretching-bending-torsion multi-load that the utility model relates to is: direct current generator 4 is that DC brushless motor, model are 57ZW24-500, stepper motor I 17 models are TDA221, stepper motor II 23 models are TDA103, guide rail I 22 models are 2SRS20M, and guide rail II 34 and supporting guide 54 models are SHW12CRM.
Material Micro Mechanical Properties test platform under stretching-bending-torsion multi-load of the present utility model, comprises stretching module, crooked module, reverses three functional modules of module and controls detection module.
Described tension and compression module embodiment is by flexible coupling, to drive worm shaft I 32 to rotate by tension and compression direct current generator 4, worm screw I 8 is fixed in worm shaft I 32, worm screw I 8 drives worm gear I 7 to rotate, worm gear I 7 is fixed in worm shaft II 33 with worm screw II 10, worm screw II 10 drives with the worm gear II 12 of its engagement and rotates, worm gear II 12 is fixed on two-way ball-screw 11 ends, two-way ball-screw 11 drives the supporting seat that is arranged in pair of guide rails in opposite directions or from motion, realization is to the compression of test specimen or stretching.Photoelectric encoder 3 can carry out the control of rotating speed size and Orientation to tension and compression direct current generator 4, photoelectric encoder 3 can carry out the control of rotating speed size and Orientation to tension and compression direct current generator 4, two-way ball-screw 11 can guarantee the two-way stretch of test specimen, makes the suffered load of test specimen symmetrically.
Described crooked module is that stepper motor II 23 is connected with ball-screw 27 by flexible coupling III 24, feed screw nut 28 drives the supporting seat IV 35 being arranged in guide rail 34 II to move, pressure head 31 moves down test specimen is applied to bending load, the size and Orientation that stepper motor driver can control step motor II 23 rotating speeds.
Described torsion module is that stepper motor I 17 is rotated by flexible coupling driven gear II 19, rotate with its meshed gears I 18, gear I 18 is arranged on gear shaft 43, flexible coupling III 42 connection teeth wheel shafts 43 and torque sensor 47, flexible coupling II 40 connects torque sensor 47 and flange bearing I 58, flange bearing I 58 and flange bearing II 59 are arranged in fixture stationary shaft I 50, together with fixture lower platen I 51 is bolted with fixture stationary shaft I 50 with fixture top board 52, and then realize the torsion to test specimen.
Described control detection module comprises pull pressure sensor 15, crooked force sensor 30, torque sensor 47, linear grating chi 37, circle grating 49, photoelectric encoder 3 and stepper motor driver.Pull pressure sensor 15 is connected with supporting seat I 14 by bolt one end, the other end is connected with fixture support seat 16, fixture support seat 16 is arranged on supporting guide 54, when test specimen is subject to torsional load, fixture support seat is delivered to torsional load on supporting guide 54, thereby avoids pull pressure sensor 15 to be subject to the impact of torsional load.Crooked force sensor 30 one end are connected with pressure head 31, and the other end is connected with bent support seat IV 35 by screw, and 31 pairs of test specimens of pressure head apply bending force and power are delivered on crooked force sensor 30 simultaneously, thus the size of Measurement accuracy bending force.Torque sensor 47 two ends are connected with fixture stationary shaft I 50 with gear I 18 respectively by flexible coupling III, II 42,40, supporting seat VI 48 inside are provided with a pair of flange bearing I 58, II 59, can bear axial load, avoid the impact of tensile load on torque sensor 47.
Described two-way ball-screw 11 is the two-way leading screw of left-right rotary, left and right stretching worktable midplane extrusion in drawing process, and sample focus target point position immobilizes, and for fixed point applies crooked transverse force, provides advantage.
Described pull pressure sensor 15 and crooked force sensor 30 are accurate S type sensor.
the course of work of the present utility model:
Under the effect of single axial tensile load: first above-mentioned small cylindrical test specimen is placed on two biting connecions fixture lower platen I 51, II 53 broached-tooth designs, rotate two-way ball-screw 11 and regulate test specimen initial position, test specimen two retained part is of convenient length.Corresponding top board is installed to relevant position with bolt, guarantees that test specimen is installed axis parallel with experiment draw direction, adjust bolt, test specimen is compressed.Photoelectric encoder 3 and tension and compression direct current generator 4 form driver element, by photoelectric encoder 3 input pulse signals, control tension and compression direct current generator 4 rotating speeds and direction.Two-stage worm couple passes motion to two-way ball-screw 11, realizes the increasing of slowing down simultaneously and turns round, and two-way ball-screw 11 rotates by two nuts and drives supporting seat I 14 to move round about.In drawing process, be fixed on linear grating ruler reading head in supporting seat II 21 38 and be fixed on grating scale 37 on pedestal 1 and gather displacement signals and send in computing machine and process, the pull pressure sensor 15 between supporting seat I 14 and fixture support seat 16 gathers load signals and sends into computing machine and process.The data of processing through software systems are shown as the stress-strain diagram of exosyndrome material mechanical property, and then obtain the every mechanics parameter of material.
Under single torsional load effect: same as above, small cylindrical test specimen is carried out to clamping, its initial position should make test specimen coaxial with fixture stationary shaft I 50.Pulse signal is sent into stepper motor driver, control step motor I 17 speed and direction.The a pair of gear pair consisting of gear I 18, II 19 passes motion to axle 43, axle 43 passes motion to torque sensor 47 by shaft coupling III 42, torque sensor 47 passes motion to fixture stationary shaft I 50 by shaft coupling II 40, fixture stationary shaft I 50 drives biting connecions fixture mounted thereto to rotate, the torsion of realization to test specimen one end, test specimen other end clamp body is fixed in supporting seat I 14 and does not rotate.In torsion test, the round grating read head 61 that is arranged on the round grating 49 in fixture stationary shaft I 50 and is fixed on supporting seat gathers test specimen torsion angle displacement signal and sends into computing machine, and the torque sensor 47 being fixed on supporting seat by sensor holder 41 gathers test piece torque signal and sends into computing machine.By computer software, to sending into the processing of angular displacement and torque signal, obtain the mechanical parameters of this material under torsional load.
Under single bending load effect: same as above, Small Cylindrical test specimen is carried out to clamping, its initial position should make test specimen mid point be positioned at being pressed into a little of pressure head 31.Pulse signal is sent into stepper motor driver, control step motor II 23 speed and direction, its motor output shaft is connected with ball-screw 27 by shaft coupling I 25, ball-screw 27 drives supporting seat III 29 to realize the motion of vertical direction by nut 28, pressure transducer 30 one end are fixed by screws in supporting seat III 29, the other end is connected with pressure head 31 by screw, and bending force is applied on test specimen by pressure head 31.During crooked experiment, first drive ram drops to and test specimen contact condition, now by drive records umber of pulse, be set to initial state, test specimen is carried out to bending load while applying, pressure transducer 30 is sent the bending force signal collecting back to computing machine, utilizes computer software to process collection signal, obtains associated materials mechanical property parameters.
At tension-torsion different proportion, load under mode of operation: same as above, first small cylindrical test specimen is carried out to clamping, make its initial position should make test specimen coaxial with fixture stationary shaft I 50.By photoelectric encoder 3 and torsion stepper motor driver, control two motor speeds, realize tension-torsion load acts on simultaneously, by linear grating chi with circle optical-mechanical system gathers test specimen stretching displacement and torsion angle displacement signal is sent into computing machine, by pull pressure sensor 15 with torque sensor 47 gathers test specimen tensions and torsional moment signal is sent into computing machine.Computer software is processed the data that collect, and analyzes and obtains the mechanical property parameters of test specimen under this integrated mode.
At stretch bending different proportion, load under mode of operation: same as above, first small cylindrical test specimen is carried out to clamping, make its initial position should make test specimen mid point be positioned at being pressed into a little of pressure head 31.By photoelectric encoder 3 and crooked stepper motor driver, controlling two motor speeds realizes stretch bending load and acts on simultaneously.Before driving photoelectric encoder 3, should first by controlling crooked stepper motor driver drive ram 31, drop to and test specimen contact condition, be stretch bending experiment initial state, now drive photoelectric encoder 3, realization time effect to test specimen pulling force and bending force, by linear grating ruler system, test specimen stretching displacement signal is sent into computing machine, by pull pressure sensor 15 and pressure transducer 30, gather test specimen pulling force and bending force signal is sent into computing machine.Computer software is processed the data that collect, and analyzes and obtains the mechanical property parameters of material under this integrated mode.
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 (8)
1. the material Micro Mechanical Properties test platform under stretching-bending-torsion multi-load, it is characterized in that: comprise tension and compression module, crooked module, reverse module, control detection module, test specimen clamping module, test platform be take tension and compression module as basic function module, reverse module arrangement in tension and compression module one end, its function can be separate or associated with tension and compression functions of modules, test specimen clamping module arrangement is in tension and compression module, crooked module is independently arranged in portal frame (2) one sides on test platform, function and tension and compression module are separate, controlling detection module is distributed in each functional module,
Described tension and compression module is: direct current generator (4) drives worm screw I (8) to rotate, worm screw I (8) drives worm gear I (7) to rotate, worm screw II (10) drives worm gear II (12) to rotate, outputting power rotates two-way ball-screw (11), be arranged in two end supports seat in linear rolling track I (22) from or move toward one another, realize the stretching of test specimen or compression; Photoelectric encoder (3) is controlled the rotating speed size and Orientation of direct current generator (4), support the taper roll bearing I (9) of worm shaft II (33) and bear the suffered axial force of worm screw, two-way ball-screw (11) makes test specimen carry out two-direction pull press, guarantees the suffered load of test specimen symmetrically;
Described crooked module is: stepper motor II (23) is connected with ball-screw (27) by motor flange III (24), flexible coupling I (25), feed screw nut I (28) drives the supporting seat IV (35) being arranged in guide rail II (34) to move up and down, pressure head (31) moves down the bending load realizing test specimen, the size and Orientation of stepper motor driver control step motor II (23) rotating speed;
Described torsion module is: stepper motor I (17) driven gear II (19) is rotated, gear I (18) and gear II (19) engagement, gear I (18) is arranged on axle (43), flexible coupling III (42) coupling shaft (43) and torque sensor (47), flexible coupling II (40) connects torque sensor (47) and fixture stationary shaft I (50), torque sensor (47) is fixed on sensor holder (41), fixture stationary shaft I (50) is by flange bearing I, II (58, 59) be arranged in supporting seat VI (48), together with fixture lower platen I (51) is bolted with fixture stationary shaft I (50),
Described control detection module comprises pull pressure sensor (15), pressure transducer (30), torque sensor (47), linear grating chi (37), circle grating (49), photoelectric encoder (3) and stepper motor driver, pull pressure sensor (15) is connected with supporting seat I (14) by bolt one end, the other end is connected with fixture support seat (16), fixture support seat (16) is arranged on supporting guide (54), when test specimen is subject to torsional load, fixture support seat is delivered to torsional load on supporting guide (54), thereby avoid pull pressure sensor (15) to be subject to the impact of torsional load, torque sensor (47) two ends are connected with fixture stationary shaft I (50) with axle (43) respectively by flexible coupling II, III (40,42), supporting seat VI (48) inside is provided with flange bearing I, II (58,59), bear axial load, avoid the impact of tensile load on torque sensor (47),
Described test specimen clamping module comprises fixture lower platen I, II (51,53) and fixture top board (52), fixture lower platen (51) is fixed by screws in clamp shaft (50), fixture lower platen (53) is fixed by screws on fixture support seat (16), the upper and lower pressing plate of fixture is bolted, and realizes the clamping to test specimen.
2. the material Micro Mechanical Properties test platform under stretching-bending-torsion multi-load according to claim 1, it is characterized in that: described pull pressure sensor (15) is arranged between the fixture support seat (16) and supporting seat I (14) on linear rolling track (22), be connected by screw, it is upper that fixture support seat (16) is fixed by screws in supporting guide (54), and supporting guide (54) is fixed by screws in supporting seat I (14).
3. the material Micro Mechanical Properties test platform under stretching-bending-torsion multi-load according to claim 1, it is characterized in that: described round grating (49) is enclosed within the fixture stationary shaft I (50) being connected with torque sensor (47), and biting connecions fixture and fixture stationary shaft I (50) are connected by screw, circle grating (49) is measured torsion angle displacement.
4. the material Micro Mechanical Properties test platform under stretching-bending-torsion multi-load according to claim 1, it is characterized in that: described pressure transducer (30) one end is connected with pressure head (31), the other end is connected with supporting seat IV (35) by screw, pressure head (31) applies bending force to test specimen, and the size of bending force records by pressure transducer (30).
5. the material Micro Mechanical Properties test platform under stretching-bending-torsion multi-load according to claim 3, it is characterized in that: described biting connecions fixture is comprised of the upper and lower pressing plate of fixture of a pair of biting connecions, fixture lower platen is fixed by square groove with fixture stationary shaft I (50) and fixture support seat (16) respectively, and connect by clamp body attachment screw, test specimen is right cylinder revolving structure, by the upper and lower pressing plate of biting connecions fixture with laciniation, in compression mode, clamps.
6. the material Micro Mechanical Properties test platform under stretching-bending-torsion multi-load according to claim 1, it is characterized in that: described two-way ball-screw (11) is the two-way leading screw of left-right rotary, left and right stretching worktable midplane extrusion in drawing process, sample focus target point position immobilizes.
7. the material Micro Mechanical Properties test platform under stretching-bending-torsion multi-load according to claim 1 and 2, is characterized in that: described pull pressure sensor (15) is accurate S type sensor.
8. according to the material Micro Mechanical Properties test platform under the stretching-bending-torsion multi-load described in claim 1 or 4, it is characterized in that: described crooked force sensor (30) is accurate S type sensor.
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