CN207423703U - Stretching preloads lower dynamic torsional fatigue Mechanics Performance Testing device - Google Patents
Stretching preloads lower dynamic torsional fatigue Mechanics Performance Testing device Download PDFInfo
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- CN207423703U CN207423703U CN201721510715.7U CN201721510715U CN207423703U CN 207423703 U CN207423703 U CN 207423703U CN 201721510715 U CN201721510715 U CN 201721510715U CN 207423703 U CN207423703 U CN 207423703U
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Abstract
The utility model is related to a kind of stretchings to preload lower dynamic torsional fatigue Mechanics Performance Testing device, belongs to precision instrument technical field.Using horizontal arrangement, including draw unit, torsional fatigue unit, force signal and displacement signal detection unit, specimen holder unit, the draw unit is arranged in test specimen both sides with torsional fatigue unit, and with test specimen on the same axis；The draw unit, torsional fatigue unit, force signal and displacement signal detection unit and specimen holder unit are all on bottom plate；Magnetic field, thermal field loading are placed between draw unit and torsional fatigue unit, realize the coupling loading of force thermal.Advantage is：Measuring accuracy is higher, and structure is relatively simple, it is easy to accomplish.It can realize stretching, torsional fatigue and stretch the Combined Loading for preloading lower torsional fatigue；The coupling loading of power electric heating magnetic can be achieved；It can Real Time Observation material microstructure changes such as crack propagation when bearing torsional fatigue.
Description
Technical field
It is more particularly to a kind of the utility model is related to the precision scientific instrument field in material micro mechanical property test field
Stretching preloads lower dynamic torsional fatigue Mechanics Performance Testing device.The instrument can be with light microscope and electric heating magnetic field collection
Into using, bear to stretch the inefficacy mechanism for preloading lower torsional fatigue material for research, crack propagation etc. provides effective ways.
Background technology
The development of material has significantly promoted social progress, but simultaneously with the development of science and technology the mankind are for material
The requirement of material is higher and higher, use condition also more sophisticated.It is main at present although material science and technology develops rapidly
Research field concentrates on the exploitation and application of new material, is developed slowly for the characterization and assessment technique of material self-characteristic, energy
The Mechanics Performance Testing device of the actual service condition of real simulation material is very rare.Obviously, if filled using traditional test
The stress of some components reality cannot be embodied completely by putting, so the mechanics parameter measured does not have absolute reference price yet
Value.
In addition, vehicle spindle, transmission shaft of machine tool etc. actually military service bear in the process be stretching, torsional fatigue even electricity
A series of reciprocation of combined loads such as pyromagnetic field, and these actual extraneous factors all can to material mechanical performance generate compared with
Big influence.Therefore, mechanics parameter is measured under foundation single load and carries out structure design it is difficult to ensure that the reliability of component.If
Can be in material mechanical performance test, exploitation one kind can be provided close to the true stressing conditions of material, true residing for simulation material
The mechanical testing instrument of real environment just can more accurately obtain mechanical property of the material under actual service condition, so as to more
Add and effectively avoid a series of major accidents caused by material failure.
The content of the invention
The purpose of this utility model is to provide a kind of stretchings to preload lower dynamic torsional fatigue Mechanics Performance Testing device,
Solves the above problem existing in the prior art.The utility model has the characteristics that：（1）It can realize stretching, torsional fatigue
Single load loading and stretch and preload the Combined Loading of lower torsional fatigue；（2）By double thick side set gear mechanisms, eliminate
The axial gap of rack pinion ensures the symmetry of fatigue load loaded；（3）It can be with electric field, thermal field and magnetic field
The coupling loading of power electric heating magnetic is realized in coupling；（4）Use can be integrated with light microscope, is realized to material in torsional fatigue
The dynamic monitoring of the microscopic characteristics such as the evolution of load undertissue, micromechanism of damage.The utility model provides one kind can be with simulation material
The experimental method of torsional fatigue under true service state, is of great significance for the micro-variations for disclosing material failure.
The above-mentioned purpose of the utility model is achieved through the following technical solutions：
Stretching preloads lower dynamic torsional fatigue Mechanics Performance Testing device, using horizontal arrangement, including draw unit, turns round
Turn tired unit, force signal and displacement signal detection unit, specimen holder unit, the draw unit and torsional fatigue unit point
41 both sides of test specimen are not arranged in, and with test specimen 41 on the same axis；The draw unit, torsional fatigue unit, force signal with
Displacement signal detection unit and specimen holder unit are all installed on a base plate 2；Magnetic field, thermal field loading be placed in draw unit and
Between torsional fatigue unit, the coupling loading of force thermal is realized.
The draw unit provides power using AC servomotor 1, by worm gear I, II 4,9, worm screw I, II 5,7
After deceleration leading screw 11 is driven to rotate, the rotary motion of feed screw nut adjutant leading screw 11 is converted to the linear motion of nut 12, so as to
Realize the loading of drawing force；Wherein described AC servomotor 1 is fixed on a base plate 2 by motor support base 3, and worm screw I 5 connects
Onto 1 output shaft of AC servomotor；The worm gear I 4, worm screw II 7 are connected on axis I 6, and axis I 6 is fixed by shaft stool 8
On a base plate 2；The worm gear II 9 is connected to by flat key on leading screw 11, and leading screw 11 is connected to bottom plate 2 by leading screw bearing 10
On；The nut 12 is connected on nut bearing 13, and nut bearing 13 is connected to guide rail II, III by sliding block III, IV 39,40
38th, on 43, guide rail II, III 38,43 is connected to by soket head cap screw in support plate 34, and support plate 34 is fixed on a base plate 2.
The torsional fatigue unit using electromagnetic exciter 21 as driver, by gear 19, rack 22 by electromagnetism
The linear reciprocating motion of vibrator 21 is changed into the crankmotion of axis II 33, so as to fulfill the loading of torsional fatigue load；
Wherein, the axis II 33 is connected on a base plate 2 by reversing shaft stool 18, and electromagnetic exciter 21 is fixed on a base plate 2, electromagnetism
The mode that vibrator 21 is connected through a screw thread is connected with rack 22；The rack 22 is connected to guide rail I by slider I, II 23,28
On 30, guide rail I 30 is connected on adjustable height bottom plate 29, and adjustable height bottom plate 29 is embedded in by groove in bottom plate 2；It is described
Gear 19 is connected to by way of key connection on axis II 33.
The force signal includes pulling force sensor 14, torque sensor 17, linear grating with displacement signal detection unit
Displacement sensor and encoder 20；Described 14 one end of pulling force sensor is threadedly attached on nut bearing 13, the other end
It is connected on clamp body bearing I 15；The torque sensor 17 is by way of flanged joint, and one end is connected to axis II 33, separately
One end is connected on clamp body II 24；The linear grating displacement sensor includes grating scale 36 and reading head 37, the grating
Ruler 36 is fixed on a base plate 2 by grating scale bearing 35, and reading head 37 is fixed on clamp body bearing I 15, passes through measured material
The displacement of body bearing I 15 measures the deflection of test specimen indirectly, and the encoder 20 is connected by encoder coupler 32 and axis II 33
It connects, realizes the measurement of reciprocating rotary angle and tired cycle, wherein encoder 20 is connected on a base plate 2 by stent 31.
The specimen holder unit includes pressing plate I, II 25,26 and clamp body I, II 27,24, and the clamp body I 27 is logical
It crosses and is threadedly coupled on clamp body bearing I 15, clamp body II 24 is connected to by clamp body bearing II 16 on bottom plate 2；The folder
Specific I, II 27,24 are machined with profiling groove, realize the positioning of test specimen 42, and pressing plate I, II 25,26 passes through soket head cap screw respectively
It is connected on clamp body II, I 24,27, applies clamping force.
The gear 19, rack 22 eliminate back lashes using double thick gear side set structures, ensure electromagnetic exciter 21
Output displacement be completely converted into the torsional displacement of test specimen 41；Wherein, bolt is passed through after double thick side set gear adjustment side set angles
42 lockings.The adjustable height bottom plate 29 adjusts the radial clearance of rack and pinion engagement, and height formula is adjustable, and bottom plate 29 passes through
Four trapezoidal grooves are positioned, and the adjustment of height is carried out by the flat head screw of lower section four.
The beneficial effects of the utility model are：Measuring accuracy is higher, and structure is relatively simple, it is easy to accomplish.With it is existing its
He compares torsional fatigue equipment, and the utility model has the characteristics that and advantage：（1）Can realize stretching, torsional fatigue and
Stretch the Combined Loading for preloading lower torsional fatigue；（2）Power electric heating magnetic can be realized with electric field, thermal field and magnetic coupling
Coupling loading；（3）It can be integrated with light microscope using in-situ observation is realized, Real Time Observation material is when bearing torsional fatigue
The microstructure changes such as crack propagation.In short, the utility model bears to stretch for research preloads lower dynamic torsional fatigue material
Inefficacy mechanism, crack propagation etc. provide effective ways, there is very strong practical value.
Description of the drawings
Attached drawing described herein is used to provide a further understanding of the present invention, and forms the part of the application,
The illustrative example and its explanation of the utility model do not form the improper limit to the utility model for explaining the utility model
It is fixed.
Fig. 1 is the overall appearance structural representation of the utility model；
Fig. 2 is the torsional fatigue cellular construction schematic diagram of the utility model；
Fig. 3 is the draw unit structure diagram of the utility model；
Fig. 4 is the specimen holder cellular construction schematic diagram of the utility model；
Fig. 5 is the gear rack anti-backlash structure diagram of the utility model.
In figure：1st, AC servomotor；2nd, bottom plate；3rd, motor support base；4th, worm gear I；5th, worm screw I；6th, axis I；7th, worm screw
Ⅱ；8th, shaft stool；9th, worm gear II；10th, leading screw bearing；11st, leading screw；12nd, nut；13rd, nut bearing；14th, pulling force sensor；
15th, clamp body bearing I；16th, clamp body bearing II；17th, torque sensor；18th, shaft stool is reversed；19th, gear；20th, encoder；
21st, electromagnetic exciter；22nd, rack；23rd, slider I；24th, clamp body II；25th, pressing plate I；26th, pressing plate II；27th, clamp body I；28、
Sliding block II；29th, adjustable height bottom plate；30th, guide rail I；31st, stent；32nd, encoder coupler；33rd, axis II；34th, support plate；
35th, grating scale bearing；36th, grating scale；37th, reading head；38th, guide rail II；39th, sliding block III；40th, sliding block IV；41st, test specimen；42nd, spiral shell
Bolt；43rd, guide rail III.
Specific embodiment
The detailed content and its specific embodiment of the utility model are further illustrated below in conjunction with the accompanying drawings.
Referring to shown in Fig. 1 to Fig. 5, the stretching of the utility model preloads lower dynamic torsional fatigue Mechanics Performance Testing dress
It puts, using horizontal arrangement, including draw unit, torsional fatigue unit, force signal and displacement signal detection unit, specimen holder list
Member, the draw unit are arranged in 42 both sides of test specimen with torsional fatigue unit, and with test specimen 42 on the same axis；It is described
Draw unit, torsional fatigue unit, force signal and displacement signal detection unit and specimen holder unit are all mounted on bottom plate 2
On；Larger space has been reserved in device central area, and magnetic field, thermal field loading can be placed between draw unit and torsional fatigue unit,
Realize the coupling loading of force thermal；In-situ observation unit can be placed in directly over device.
Shown in Figure 3, the draw unit provides power using AC servomotor 1, by worm gear I, II 4,
9th, after worm screw I, II 5,7 is slowed down leading screw 11 is driven to rotate, the rotary motion of feed screw nut adjutant leading screw 11 is converted to nut 12
Linear motion, so as to fulfill the loading of drawing force；Wherein described AC servomotor 1 is fixed on bottom plate 2 by motor support base 3
On, worm screw I 5 is connected on 1 output shaft of AC servomotor；The worm gear I 4, worm screw II 7 are connected on axis I 6, and axis I 6 is logical
Shaft stool 8 is crossed to fix on a base plate 2；The worm gear II 9 is connected to by flat key on leading screw 11, and leading screw 11 passes through leading screw bearing 10
It is connected on bottom plate 2；The nut 12 is connected on nut bearing 13, and nut bearing 13 is connected to by sliding block III, IV 39,40
On guide rail II, III 38,43, guide rail II, III 38,43 is connected to by soket head cap screw in support plate 34, and support plate 34 is fixed on
On bottom plate 2.
It is shown in Figure 2, the torsional fatigue unit using electromagnetic exciter 21 as driver, by gear 19,
The linear reciprocating motion of electromagnetic exciter 21 is changed into the crankmotion of axis II 33 by rack 22, so as to fulfill torsional fatigue
The loading of load；Wherein, the axis II 33 is connected on a base plate 2 by reversing shaft stool 18, and electromagnetic exciter 21 is fixed on
On bottom plate 2, mode and rack 22 that electromagnetic exciter 21 is connected through a screw thread are connected；The rack 22 by slider I, II 23,
28 are connected on guide rail I 30, and guide rail I 30 is connected on adjustable height bottom plate 29, and adjustable height bottom plate 29 is embedding by groove
Enter in bottom plate 2；The gear 19 is connected to by way of key connection on axis II 33.
Referring to shown in Fig. 1 and Fig. 3, the force signal includes pulling force sensor 14 with displacement signal detection unit, turns round for institute
Square sensor 17, linear grating displacement sensor and encoder 20；Described 14 one end of pulling force sensor is threadedly attached to
On nut bearing 13, the other end is connected on clamp body bearing I 15；The torque sensor 17 by way of flanged joint,
One end is connected to axis II 33, and the other end is connected on clamp body II 24；The linear grating displacement sensor includes grating scale 36
And reading head 37, the grating scale 36 are fixed on a base plate 2 by grating scale bearing 35, reading head 37 is fixed on clamp body bearing
On I 15, the deflection of test specimen is measured indirectly by the displacement of measured material body bearing I 15, effectively prevent stretching force snesor
Test specimen displacement measurement errors caused by deformation；The encoder 20 is connected by encoder coupler with axis II 33, is realized reciprocal
The measurement of rotation angle and tired cycle, wherein encoder 20 are connected on a base plate 2 by stent 31.
Shown in Figure 4, the specimen holder unit includes pressing plate I, II 25,26 and clamp body I, II 27,24, described
Clamp body I 27 is threadedly attached on clamp body bearing I 15, and clamp body II 24 is connected to bottom plate by clamp body bearing II 16
On 2；The clamp body I, II 27,24 is machined with profiling groove, realizes the positioning of test specimen 42, and pressing plate I, II 25,26 passes through respectively
Soket head cap screw is connected on clamp body II, I 24,27, applies clamping force.
Shown in Figure 5, the gear 19, rack 22 eliminate back lashes using double thick gear side set structures, ensure
The output displacement of electromagnetic exciter 21 is completely converted into the torsional displacement of test specimen 41；Wherein, double thick side set gear adjustment side set angles
Pass through bolt after degree（42）Locking.The adjustable height bottom plate 29 adjusts the radial clearance of rack and pinion engagement, height formula
Adjustable bottom plate 29 is positioned by four trapezoidal grooves, and the adjustment of height is carried out by the flat head screw of lower section four.
The stretching of the utility model preloads lower dynamic torsional fatigue Mechanics Performance Testing device, central area reserved compared with
Large space can be used with electric field, thermal field and magnetic coupling, the coupling loading of power electric heating magnetic be realized, so as to real simulation material
Expect actual service state.Draw unit after two-stage worm and gear deceleration torque, is realized and stretched using AC servo motor
The loading of load；Torsional fatigue unit, as driver, is driven through rack and pinion mechanism using electromagnetic exciter, realizes that torsion is tired
The loading of labor load；Force signal is compiled with displacement signal detection unit using force snesor, linear grating displacement sensor and photoelectricity
Code device carries out signal acquisition.This test device can realize tensile loads, and it is tired that torsional fatigue loading, stretching preload lower dynamic torsion
The Combined Loading of labor.In addition, certain space has been reserved in device central area, the coupling loading and survey of power heat, power magnetic can be realized
Examination.Device overall structure is smaller, and use, the extension row of real-time dynamic monitoring torsional fatigue crackle can be integrated with light microscope
To realize in-situ observation.The present apparatus realizes the coupling loading of stretching, torsional fatigue, and principle is reliable, can be to torque and torsion angle
Degree is accurately measured, while by the ingehious design of double thick gear side set structures, is eliminated between the transmission that torsional fatigue loads
Gap, dynamic property is good, accurately can test and analyze the mechanical property and inefficacy mechanism of material under torsional fatigue, has wide
Application prospect.
The foregoing is merely the preferred embodiments of the utility model, are not intended to limit the utility model, for ability
For the technical staff in domain, various modifications and changes may be made to the present invention.All any modifications made to the utility model,
Equivalent substitution, improvement etc., should be included within the scope of protection of this utility model.
Claims (6)
1. a kind of stretching preloads lower dynamic torsional fatigue Mechanics Performance Testing device, it is characterised in that：Using horizontal arrangement, bag
Include draw unit, torsional fatigue unit, force signal and displacement signal detection unit, specimen holder unit, the draw unit with
Torsional fatigue unit is arranged in test specimen（41）Both sides, and and test specimen（41）On the same axis；The draw unit, torsion
Tired unit, force signal and displacement signal detection unit and specimen holder unit are all mounted on bottom plate（2）On；Magnetic field, heat
Field loading is placed between draw unit and torsional fatigue unit, realizes the coupling loading of force thermal.
2. stretching according to claim 1 preloads lower dynamic torsional fatigue Mechanics Performance Testing device, it is characterised in that：
The draw unit uses AC servomotor（1）Power is provided, by worm gear I, II（4、9）, worm screw I, II（5、7）Subtract
Leading screw is driven after speed（11）Rotation, feed screw nut adjutant's leading screw（11）Rotary motion be converted to nut（12）Linear motion,
So as to fulfill the loading of drawing force；Wherein described AC servomotor（1）Pass through motor support base（3）It is fixed on bottom plate（2）On,
Worm screw I（5）It is connected to AC servomotor（1）On output shaft；The worm gear I（4）, worm screw II（7）It is connected to axis I（6）On,
Axis I（6）Pass through shaft stool（8）It is fixed on bottom plate（2）On；The worm gear II（9）Leading screw is connected to by flat key（11）On, leading screw
（11）By leading screw bearing（10）It is connected to bottom plate（2）On；The nut（12）It is connected to nut bearing（13）On, nut bearing
（13）Pass through sliding block III, IV（39、40）It is connected to guide rail II, III（38、43）On, guide rail II, III（38、43）Pass through interior hexagonal spiral shell
Nail is connected to support plate（34）On, support plate（34）It is fixed on bottom plate（2）On.
3. stretching according to claim 1 preloads lower dynamic torsional fatigue Mechanics Performance Testing device, it is characterised in that：
The torsional fatigue unit uses electromagnetic exciter（21）As driver, by gear（19）, rack（22）Electromagnetism is swashed
Shake device（21）Linear reciprocating motion be changed into axis II（33）Crankmotion, so as to fulfill torsional fatigue load plus
It carries；Wherein, the axis II（33）By reversing shaft stool（18）It is connected in bottom plate（2）On, electromagnetic exciter（21）Pass through screw thread
It is fastened on bottom plate（2）On, electromagnetic exciter（21）The mode and rack being connected through a screw thread（22）It is connected；The rack
（22）Pass through slider I, II（23、28）It is connected to guide rail I（30）On, guide rail I（30）It is connected to adjustable height bottom plate（29）On,
Adjustable height bottom plate（29）Bottom plate is embedded in by groove（2）In；The gear（19）Axis is connected to by way of key connection
Ⅱ（33）On.
4. stretching according to claim 1 preloads lower dynamic torsional fatigue Mechanics Performance Testing device, it is characterised in that：
The force signal includes pulling force sensor with displacement signal detection unit（14）, torque sensor（17）, linear grating displacement
Sensor and encoder（20）；The pulling force sensor（14）One end is threadedly attached to nut bearing（13）On, it is another
End is connected to clamp body bearing I（15）On；The torque sensor（17）By way of flanged joint, one end is connected to axis II
（33）, the other end is connected to clamp body II（24）On；The linear grating displacement sensor includes grating scale（36）And reading head
（37）, the grating scale（36）Pass through grating scale bearing（35）It is fixed on bottom plate（2）On, reading head（37）It is fixed on clamp body branch
Seat I（15）On, pass through measured material body bearing I（15）Displacement measure the deflection of test specimen indirectly；The encoder（20）It is logical
Cross encoder coupler（32）With axis II（33）Connection realizes the measurement of reciprocating rotary angle and tired cycle, wherein encoding
Device（20）Pass through stent（31）It is connected in bottom plate（2）On.
5. stretching according to claim 1 preloads lower dynamic torsional fatigue Mechanics Performance Testing device, it is characterised in that：
The specimen holder unit includes pressing plate I, II（25、26）And clamp body I, II（27、24）, the clamp body I（27）Pass through
It is threadedly coupled to clamp body bearing I（15）On, clamp body II（24）Pass through clamp body bearing II（16）It is connected to bottom plate（2）On；
The clamp body I, II（27、24）Profiling groove is machined with, realizes test specimen（42）Positioning, pressing plate I, II（25、26）Lead to respectively
It crosses soket head cap screw and is connected in clamp body II, I（24、27）On, apply clamping force.
6. stretching according to claim 3 preloads lower dynamic torsional fatigue Mechanics Performance Testing device, it is characterised in that：
The gear（19）, rack（22）Back lash is eliminated using double thick gear side set structures, ensures electromagnetic exciter（21）'s
Output displacement is completely converted into test specimen（41）Torsional displacement；The adjustable height bottom plate（29）Adjust rack and pinion engagement
Radial clearance, height formula is adjustable bottom plate（29）Positioned by four trapezoidal grooves, by the flat head screw of lower section four into
The adjustment of row height.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721510715.7U CN207423703U (en) | 2017-11-14 | 2017-11-14 | Stretching preloads lower dynamic torsional fatigue Mechanics Performance Testing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721510715.7U CN207423703U (en) | 2017-11-14 | 2017-11-14 | Stretching preloads lower dynamic torsional fatigue Mechanics Performance Testing device |
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| CN107703006A (en) * | 2017-11-14 | 2018-02-16 | 吉林大学 | Stretching preloads lower dynamic torsional fatigue Mechanics Performance Testing device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107703006A (en) * | 2017-11-14 | 2018-02-16 | 吉林大学 | Stretching preloads lower dynamic torsional fatigue Mechanics Performance Testing device |
| CN108839329A (en) * | 2018-06-15 | 2018-11-20 | 大连理工大学 | A kind of quantitative preparation test device and method of Fypro artificial-muscle |
| CN108839329B (en) * | 2018-06-15 | 2020-02-18 | 大连理工大学 | Quantitative preparation testing device and method for polyamide fiber artificial muscle |
| CN109115594A (en) * | 2018-09-03 | 2019-01-01 | 东北大学 | Test the device and method of mechanical property when fibre reinforced composites are degenerated |
| CN109115594B (en) * | 2018-09-03 | 2020-10-23 | 东北大学 | Device and method for testing mechanical property of fiber reinforced composite material during degradation |
| CN110068514A (en) * | 2019-03-07 | 2019-07-30 | 中国矿业大学 | The tension-torsion composite fatigue test device and its test method of heavily loaded drag conveyor round-link chain |
| CN110068514B (en) * | 2019-03-07 | 2021-08-24 | 中国矿业大学 | Tension-torsion composite fatigue testing device and method for circular chain of heavy-duty scraper conveyor |
| CN114798401A (en) * | 2022-03-18 | 2022-07-29 | 广州大学 | High-maneuverability wide-frequency large-output excitation device |
| CN114798401B (en) * | 2022-03-18 | 2023-08-04 | 广州大学 | High-mobility broadband high-output excitation device |
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