CN103926160A - In-situ tester for micromechanical property of material under combined tension and torsion - Google Patents
In-situ tester for micromechanical property of material under combined tension and torsion Download PDFInfo
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- CN103926160A CN103926160A CN201410155051.1A CN201410155051A CN103926160A CN 103926160 A CN103926160 A CN 103926160A CN 201410155051 A CN201410155051 A CN 201410155051A CN 103926160 A CN103926160 A CN 103926160A
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Abstract
The invention relates to an in-situ tester for the micromechanical property of a material under combined tension and torsion, and belongs to the field of precise instruments. The tester comprises a base, a tension and torsion loading unit, a test-piece clamping unit, and a displacement and loading force precision testing unit, wherein the torsion loading unit drives two-level worm wheel and worm driving mechanisms to apply a torsion load to one end of a moving clamp through a precision motor, so that the torsion load is applied to a tested test-piece sample; a fixed clamp end is arranged on a precision guide rail sliding block; one end of the moving clamp is provided with a precision tension and torsion sensor for used for detecting the tension and torsion born by a testing workpiece, and a motor encoder can detect the tension strain and torsion angle. The in-situ tester provided by the invention has the characteristics that the structure is compact and exquisite, the volume is small, the weight is light, in-situ testing in micro-nano precision for the micromechanical property of the material under combined tension and torsion can be realized, and a novel testing method is provided for analytical investigation of a material deformation damage mechanism under the serving approaching condition.
Description
Technical field
The present invention relates to field of precision instruments, particularly a kind of combined load material Micro Mechanical Properties in-situ test instrument that stretches-reverse.Can under multiple material performance characterization instrument (scanning electron microscope, optical microscope, Raman spectrometer, X-ray diffractometer etc.) dynamic monitoring, carry out dynamic in-situ monitoring to deformation damage mechanism and heterogeneous microstructure Changing Pattern under material for test load.The present invention has a good application prospect in fields such as Ferrous Metallurgy, non-ferrous metal, semiconductor material, advanced metal, defence and military and Aero-Space.
Background technology
Material Micro Mechanical Properties in-situ testing technique is the cutting edge technology that development in recent years is got up, and is subject to showing great attention to of national governments and research institution.Micro-stretching is reversed mechanics measuring technology and is had and can be under the observation of all kinds of Image-forming instruments test specimen be carried out to original position stretching, torsion and composite test and the microdeformation to material and damage process and carry out the many advantages of home position observation.Than traditional mechanics measuring technology, micro-nano stretching reverses mechanics measuring technology and is only grasped and use by the researchist of minority at present, main cause be this Technology Need in meeting high measuring accuracy, ensure the miniaturization of testing tool and with the compatibility of in-situ monitoring equipment.Current micro-nano torsion mechanical test mainly concentrates in transmission electron microscope (TEM) and scanning electron microscope (SEM) to be carried out, both there is very limited working cavity, and need to ensure Electro Magnetic Compatibility and the vacuum compatibility of proving installation and working cavity, these reasons have limited the fast development of micro-nano stretching torsion mechanics measuring technology just.All in all, research high precision, large test specification, the compound mechanics of micro-nano stretching torsion cheaply proving installation are still challenging work, are also a urgent job simultaneously.
Summary of the invention
The object of the present invention is to provide a kind of combined load material Micro Mechanical Properties in-situ test instrument that stretches-reverse, solved the problems referred to above that prior art exists, in order to realize, volume is little in the present invention, the precise materials micro-nano stretching torsion device single and compound mechanics performance test that can be used for of delicate structure provides a kind of available solutions.By proving installation provided by the invention, can realize Electro Magnetic Compatibility and the vacuum compatibility of proving installation and Electronic Speculum working cavity, promote original position micro-nano stretching to reverse the development of mechanics measuring technology.
Above-mentioned purpose of the present invention is achieved through the following technical solutions:
Combined load material Micro Mechanical Properties in-situ test instrument stretches-reverses, comprise torque loading mechanism, test specimen clamping device, stretching load maintainer, described torque loading mechanism is arranged on pedestal 1 and upper bracket 3, wherein upper bracket 3 is fixedly mounted on pedestal 1 by base seat support a, b, c2,39,40, slow down, commutate by two-stage worm and gear, moment of torsion is carried in to test piece; Test specimen clamping device comprises two piece fixtures 18 and four adjustment blocks 20, and adjustment block 20 is arranged on piece fixture 18 the insides, adjusts the position that test specimen 19 clamps; Stretching load maintainer is arranged on pedestal 1 and above upper bracket 3, slow down and commutate by two-stage worm and gear, moment of torsion is applied on leading screw 26, leading screw (26) will rotatablely move and be converted into rectilinear motion, drive feed screw nut 25 rectilinear motions, then drive tension-torsion sensor 21 and piece fixture 18 to carry out extensional motion.
Described torque loading mechanism comprises accurate drive motor a4, motor flange a5, shaft coupling a6, worm screw a8, worm gear a10, worm screw b13, worm gear b14, described accurate drive motor a4 is arranged on motor flange a5, motor flange a5 is arranged on pedestal 1 with screw, and its output shaft is connected by shaft coupling 4 with worm shaft a11; Worm screw a8 is screwed and is arranged on worm shaft a11, is then arranged on pedestal 1 by two bearing spider a7 and two standard rolling bearings, and forms first order deceleration and commutation with worm gear a10; In like manner forming the second level by worm screw b13 and worm gear b14 slows down and commutates; Double reduction and commutation, the first order adopts less reduction gear ratio, and the second level adopts compared with big retarding ratio, and the precision loading to improve moment of torsion, reduces torque loading mechanism physical dimension.Moment of torsion is transferred on piece fixture 18 by worm-wheel shaft a15; Worm-wheel shaft a15 is arranged on upper bracket 3 by bearing spider c17, and bearing spider c17 inside is provided with bearing 41, and bearing (ball) cover 16 and the end ring 42 of solid bearing 41 is also installed.
Described test specimen clamping device comprises bearing (ball) cover 16, bearing spider c17, two piece fixtures 18 and adjustment block 20, the piece fixture 18 in left side is connected with second level deceleration output shaft, be worm-wheel shaft a15, both are arranged on upper bracket 3 by precision bearing, bearing spider c17 and bearing (ball) cover 16 and screw; The piece fixture 18 on right side is directly connected with the accurate tension-torsion sensor 21 of stretching load maintainer.
Described stretching load maintainer comprises accurate tension-torsion sensor 21, nut adapter sleeve 22, back up pad 23, precise guide rail slide block 24, feed screw nut 25, leading screw 26 and two-stage turbine and worm decelerator, the left end of described accurate tension-torsion sensor 21 is connected with the piece fixture 18 on right side by screw, the right-hand member of accurate tension-torsion sensor 21 is installed together by screw and nut adapter sleeve 22, nut adapter sleeve 22 is arranged on feed screw nut 25, the screw pair that feed screw nut 25 and leading screw 26 form is arranged on upper bracket 3 by leading screw supporting seat 27, back up pad 23 attaching nut's adapter sleeve 22 and guide rail slide block 24 respectively, drive back up pad 23 to realize rectilinear motion by feed screw nut 25, guide rail slide block 24 is fixedly mounted on back-up block 43, screw pair is by the two-stage worm and gear deceleration on right side, it is the same that the torsion in its kind of drive and left side loads transmission.
The upper scrambler of installing of described accurate drive motor a4 is measured the angle of reversing, and obtains the actual angle turning over by the conversion of reduction gear ratio; The upper scrambler of installing of accurate drive motor b37 being arranged on pedestal 1 is measured the displacement stretching, and obtains the displacement stretching after converting.
Described stretching-torsion combined load material Micro Mechanical Properties in-situ test instrument can be placed in scanning electron microscope cavity, has good compatibility with Electronic Speculum.
Beneficial effect of the present invention is: small volume structure compactness, reverse loading force and stretching travel large, and can be placed in scanning electron microscope cavity, there is good compatibility with Electronic Speculum.Can under the observation of all kinds of Image-forming instruments, carry out original position stretching to test specimen and reverse single and compound mechanics test, microdeformation to material and damage process are carried out home position observation, and can gather load/displacement signal, thereby disclose mechanical characteristic and the micromechanism of damage of material under micro-nano-scale, promote the development of the technology such as new material new process, material science, ultraprecise processing, solid mechanics.
Brief description of the drawings
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, and illustrative example of the present invention and explanation thereof are used for explaining the present invention, do not form inappropriate limitation of the present invention.
Fig. 1 is perspective view of the present invention;
Fig. 2 is main TV structure schematic diagram of the present invention;
Fig. 3 is plan structure schematic diagram of the present invention;
Fig. 4 is right TV structure schematic diagram of the present invention;
Fig. 5 is sectional structure schematic diagram of the present invention.
In figure: 1. pedestal, 2. base seat support a, 3. upper bracket, 4. accurate drive motor a, 5. motor flange a, 6. shaft coupling a, 7. bearing spider a, 8. worm screw a, 9. worm shaft b, 10. worm gear a, 11. worm shaft a, 12. bearing spider b, 13. worm screw b, 14. worm gear b, 15. worm-wheel shaft a, 16. bearing (ball) covers, 17. bearing spider c, 18. piece fixtures, 19. test specimens, 20. adjustment blocks, 21. accurate tension-torsion sensors, 22. nut adapter sleeves, 23. back up pads, 24. precise guide rail slide blocks, 25. feed screw nuts, 26. leading screws, 27. leading screw supporting seats, 28. worm gear c, 29. worm screw c, 30. bearing spider d, 31. worm gear d, 32. worm shaft c, 33. bearing spider e, 34. worm screw d, 35. shaft coupling b, 36. motor flange b, 37. accurate drive motor b, 38. worm shaft d, 39. base seat support b, 40. base seat support c, 41. bearings, 42. end rings, 43. back-up blocks, 44. nuts.
Embodiment
Further illustrate detailed content of the present invention and embodiment thereof below in conjunction with accompanying drawing.
Referring to shown in Fig. 1 to Fig. 5, stretching-torsion combined load material Micro Mechanical Properties in-situ test instrument of the present invention, comprise torque loading mechanism, test specimen clamping device, stretching load maintainer, described torque loading mechanism is arranged on pedestal 1 and upper bracket 3, wherein upper bracket 3 is fixedly mounted on pedestal 1 by base seat support a, b, c2,39,40, slow down, commutate by two-stage worm and gear, moment of torsion is carried in to test piece; Test specimen clamping device comprises two piece fixtures 18 and four adjustment blocks 20, and adjustment block 20 is arranged on piece fixture 18 the insides, adjusts the position that test specimen 19 clamps; Stretching load maintainer is arranged on pedestal 1 and above upper bracket 3, slow down and commutate by two-stage worm and gear, moment of torsion is applied on leading screw 26, leading screw (26) will rotatablely move and be converted into rectilinear motion, drive feed screw nut 25 rectilinear motions, then drive tension-torsion sensor 21 and piece fixture 18 to carry out extensional motion.
Described torque loading mechanism comprises accurate drive motor a4, motor flange a5, shaft coupling a6, worm screw a8, worm gear a10, worm screw b13, worm gear b14, described accurate drive motor a4 is arranged on motor flange a5, motor flange a5 is arranged on pedestal 1 with screw, and its output shaft is connected by shaft coupling 4 with worm shaft a11; Worm screw a8 is screwed and is arranged on worm shaft a11, is then arranged on pedestal 1 by two bearing spider a7 and two standard rolling bearings, and forms first order deceleration and commutation with worm gear a10; In like manner forming the second level by worm screw b13 and worm gear b14 slows down and commutates; Double reduction and commutation, the first order adopts less reduction gear ratio, and the second level adopts compared with big retarding ratio, and the precision loading to improve moment of torsion, reduces torque loading mechanism physical dimension.Moment of torsion is transferred on piece fixture 18 by worm-wheel shaft a15; Worm-wheel shaft a15 is arranged on upper bracket 3 by bearing spider c17, and bearing spider c17 inside is provided with bearing 41, and bearing (ball) cover 16 and the end ring 42 of solid bearing 41 is also installed.
Described test specimen clamping device comprises bearing (ball) cover 16, bearing spider c17, two piece fixtures 18 and adjustment block 20, the piece fixture 18 in left side is connected with second level deceleration output shaft, be worm-wheel shaft a15, both are arranged on upper bracket 3 by precision bearing, bearing spider c17 and bearing (ball) cover 16 and screw; The piece fixture 18 on right side is directly connected with the accurate tension-torsion sensor 21 of stretching load maintainer.
Described stretching load maintainer comprises accurate tension-torsion sensor 21, nut adapter sleeve 22, back up pad 23, precise guide rail slide block 24, feed screw nut 25, leading screw 26 and two-stage turbine and worm decelerator, the left end of described accurate tension-torsion sensor 21 is connected with the piece fixture 18 on right side by screw, the right-hand member of accurate tension-torsion sensor 21 is installed together by screw and nut adapter sleeve 22, nut adapter sleeve 22 is arranged on feed screw nut 25, the screw pair that feed screw nut 25 and leading screw 26 form is arranged on upper bracket 3 by leading screw supporting seat 27, back up pad 23 attaching nut's adapter sleeve 22 and guide rail slide block 24 respectively, drive back up pad 23 to realize rectilinear motion by feed screw nut 25, guide rail slide block 24 is fixedly mounted on back-up block 43, screw pair is by the two-stage worm and gear deceleration on right side, it is the same that the torsion in its kind of drive and left side loads transmission.
The upper scrambler of installing of described accurate drive motor a4 is measured the angle of reversing, and obtains the actual angle turning over by the conversion of reduction gear ratio; The upper installation of accurate drive motor b37 scrambler is measured the displacement stretching, and obtains the displacement of stretching after converting, and accurate drive motor b37 is arranged on pedestal 1 by motor flange b36.
Described stretching-torsion combined load material Micro Mechanical Properties in-situ test instrument can be placed in scanning electron microscope cavity, has good compatibility with Electronic Speculum.
In the present invention, the loading of moment of torsion realizes by accurate drive motor a4 and Worm Wheel System chain, concrete embodiment is, connect shaft coupling a6 driving worm screw a8 and worm gear a10 and worm screw b13 and worm gear b14 by the accurate drive motor a4 being fixedly mounted on by motor flange a5 on pedestal 1, through the commutation of worm and gear, slow down and increase moment of torsion, wherein worm shaft a11 is arranged on pedestal 1 by two bearing spider a7, worm shaft b9 is arranged on pedestal 1 by two bearing spider b12, moment of torsion is passed to piece fixture 18 by worm gear b14, worm-wheel shaft a15 is arranged on upper bracket 3 by bearing spider c17, bearing spider c17 inside is provided with bearing 41, bearing (ball) cover 16 and the end ring 42 of solid bearing 41 are also installed, wherein upper bracket 3 is installed by base seat support a2, base seat support b39, base seat support c40 is fixedly mounted on pedestal 1, in implementation process, driving by accurate drive motor a4 is carried out the loading of stable precision to test specimen 19.In implementation process, by the scrambler on accurate drive motor a4, windup-degree is detected.
The motion of test specimen clamping device is divided into two kinds: a kind of active torque of the piece fixture 18 that is left side loads motion, be the piece fixture 18 on right side and the rotation of accurate tension-torsion sensor 21 and the rectilinear motion along test specimen axis direction, driven by the stretching load maintainer on right side.Embodiment is that worm gear b14 passes to moment of torsion the piece fixture 18 in left side and loads on test specimen one end by left side adjustment block 20, realizes the active torque loading motion of the piece fixture 18 in left side.Moment of torsion passes to piece fixture 18 and the adjustment block 20 on right side by test specimen 19, make the piece fixture 18 on right side produce small distortion rotation.Test specimen 19 axial property under torsional load effect can change, and cause the variation of axial dimension, thereby drive the piece fixture 18 on right side to produce rectilinear motion on precise guide rail slide block 24, wherein precise guide rail slide block 24 is arranged on upper bracket 3 by back-up block 43.
Stretching load maintainer can initiatively make the piece fixture 18 on right side realize along the rectilinear motion of guide rail slide block 24, realize the loading of stretching displacement, its embodiment is: drive worm screw d34 and worm gear d31 and worm screw c29 and worm gear c28 by the accurate drive motor b37 being arranged on pedestal 1 by shaft coupling b35, wherein worm shaft c32 and worm shaft d38 are arranged on pedestal 1 by two bearing spider d30 and bearing spider e33 respectively, through the commutation of worm and gear, slow down and increase moment of torsion, moment of torsion is passed to leading screw 26 by worm gear c28, leading screw 26 is changed to along the rectilinear motion of guide rail slide block 24 by feed screw nut adjutant rotation motion, feed screw nut 25 bands are automatically connected in the nut adapter sleeve 22 above it, back up pad 23, the piece fixture 18 on accurate tension-torsion sensor 21 and right side is realized the loading stretching, wherein screw pair is fixedly mounted on upper bracket 3 by leading screw supporting seat 27 and nut 44.In implementation process, by the scrambler on motor b37, stretching displacement is detected.
The foregoing is only preferred embodiment of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.All any amendments made for the present invention, be equal to replacement, improvement etc., within protection scope of the present invention all should be included in.
Claims (6)
1. stretching-torsion combined load material Micro Mechanical Properties in-situ test instrument, it is characterized in that: comprise torque loading mechanism, test specimen clamping device, stretching load maintainer, described torque loading mechanism is arranged on pedestal (1) and upper bracket (3), wherein upper bracket (3) is by base seat support a, b, c(2,39,40) be fixedly mounted on pedestal (1), slow down, commutate by two-stage worm and gear, moment of torsion is carried in to test piece; Test specimen clamping device comprises two piece fixtures (18) and four adjustment blocks (20), and adjustment block (20) is arranged on piece fixture (18) the inside, adjusts the position of test specimen (19) clamping; Stretching load maintainer is arranged on pedestal (1) and upper bracket (3) above, slow down and commutate by two-stage worm and gear, moment of torsion is applied on leading screw (26), leading screw (26) will rotatablely move and be converted into rectilinear motion, drive feed screw nut (25) rectilinear motion, then drive tension-torsion sensor (21) and piece fixture (18) to carry out extensional motion.
2. stretching-torsion combined load material Micro Mechanical Properties in-situ test instrument according to claim 1, it is characterized in that: described torque loading mechanism comprises accurate drive motor a(4), motor flange a(5), shaft coupling a(6), worm screw a(8), worm gear a(10), worm screw b(13), worm gear b(14), described accurate drive motor a(4) be arranged on motor flange a(5) on, motor flange a(5) be arranged on pedestal (1) above, its output shaft and worm shaft a(11) be connected by shaft coupling (4); Worm screw a(8) be fixedly mounted on worm shaft a(11), then by two bearing spider a(7) and two standard rolling bearings to be arranged on pedestal (1) upper, and with worm gear a(10) form that the first order is slowed down and commutation; In like manner by worm screw b(13) and worm gear b(14) form second level deceleration and commutate; The reduction gear ratio that the first order is slowed down and commutation adopts is less than the reduction gear ratio that slow down in the second level and commutation adopts; Moment of torsion is by worm-wheel shaft a(15) be transferred on piece fixture (18); Worm-wheel shaft a(15) by bearing spider c(17) be arranged on (3) on upper bracket, bearing spider c(17) inside is provided with bearing (41), and bearing (ball) cover (16) and the end ring (42) of solid bearing (41) is also installed.
3. stretching-torsion combined load material Micro Mechanical Properties in-situ test instrument according to claim 1, it is characterized in that: described test specimen clamping device comprises bearing (ball) cover (16), bearing spider c(17), two piece fixtures (18) and adjustment block (20), the piece fixture (18) in left side is connected with second level deceleration output shaft, be worm-wheel shaft a(15), both are by precision bearing, bearing spider c(17) and bearing (ball) cover (16) and screw be arranged on upper bracket (3); The piece fixture (18) on right side is directly connected with the accurate tension-torsion sensor (21) of stretching load maintainer.
4. stretching-torsion combined load material Micro Mechanical Properties in-situ test instrument according to claim 1, it is characterized in that: described stretching load maintainer comprises accurate tension-torsion sensor (21), nut adapter sleeve (22), back up pad (23), precise guide rail slide block (24), feed screw nut (25), leading screw (26) and two-stage turbine and worm decelerator, the left end of described accurate tension-torsion sensor (21) is connected with the piece fixture (18) on right side by screw, the right-hand member of accurate tension-torsion sensor (21) is installed together by screw and nut adapter sleeve (22), nut adapter sleeve (22) is arranged on feed screw nut (25), the screw pair that feed screw nut (25) and leading screw (26) form is arranged on upper bracket (3) by leading screw supporting seat (27), back up pad (23) is attaching nut's adapter sleeve (22) and guide rail slide block (24) respectively, drive back up pad (23) to realize rectilinear motion by feed screw nut (25), guide rail slide block (24) is fixedly mounted on back-up block (43), screw pair is by the two-stage worm and gear deceleration on right side, it is the same that the torsion in its kind of drive and left side loads transmission.
5. stretching-torsion combined load material Micro Mechanical Properties in-situ test instrument according to claim 2, it is characterized in that: described accurate drive motor a(4) the upper angle that scrambler measurement torsion is installed, obtain the actual angle turning over by the conversion of reduction gear ratio; Be arranged on the accurate drive motor b(37 on pedestal (1)) the upper displacement that scrambler measurement stretching is installed, after converting, obtain the displacement stretching.
6. according to the stretching-torsion combined load material Micro Mechanical Properties in-situ test instrument described in any one in claim 1 to 5, it is characterized in that: described stretching-torsion combined load material Micro Mechanical Properties in-situ test instrument is placed in scanning electron microscope cavity, has good compatibility with Electronic Speculum.
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| CN201410155051.1A CN103926160B (en) | 2014-04-18 | 2014-04-18 | Stretch-reverse combined load material Micro Mechanical Properties in-situ test instrument |
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| CN201410155051.1A CN103926160B (en) | 2014-04-18 | 2014-04-18 | Stretch-reverse combined load material Micro Mechanical Properties in-situ test instrument |
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| CN103926160B CN103926160B (en) | 2016-02-03 |
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