CN110361451A - A kind of adaptive frequency formula Ultrasonic Fatigue Test-Bed - Google Patents
A kind of adaptive frequency formula Ultrasonic Fatigue Test-Bed Download PDFInfo
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- CN110361451A CN110361451A CN201810006116.4A CN201810006116A CN110361451A CN 110361451 A CN110361451 A CN 110361451A CN 201810006116 A CN201810006116 A CN 201810006116A CN 110361451 A CN110361451 A CN 110361451A
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
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Abstract
The present invention relates to a kind of adaptive frequency formula Ultrasonic Fatigue Test-Beds in material testing apparatus field.It solves the problems, such as Ultrasonic fatigue testing frequency adaptation and mean stress load.Its technical solution is: the intrinsic frequency of transducing positioning seat, hold-down support and displacement amplifier is 20kHz, adjust transducing positioning seat, hold-down support and displacement amplifier link position screws size, and the intrinsic frequency that can effectively adjust excusing from death generating assembly entirety adjusts in a certain range；Test specimen rear end and displacement amplifier front end are fastened with stud, and load support can apply drawing, compression load to test specimen.The present invention can realize the mean stress load in Ultrasonic fatigue testing；It is matched using PID closed-loop control adjust automatically ultrasound generating assembly intrinsic frequency and test specimen intrinsic frequency, effectively increases Ultrasonic fatigue testing precision, guarantee test data validity；The fatigue test of 20kHz frequency can be achieved in the present invention, effectively shortens Fatigue Test Time, can efficiently complete 1010Cycle testing fatigue.
Description
Technical field
The present invention relates to a kind of adaptive frequency formula Ultrasonic Fatigue Test-Beds in material testing apparatus field.
Background technique
Material testing apparatus, which refers to, to carry out the instrument of mechanical property and technological property test to material, part, component and sets
It is standby, be measured under various conditions, environment metal material, nonmetallic materials, machine components, engineering structure etc. mechanical performance,
The fine measuring instrument of processing performance, internal flaw.
The stress of each point during the work time such as machine components such as axis, gear, bearing, blade, spring makees week at any time
The variation of phase property, it is this to be referred to as alternate stress as the time makees periodically variable stress.Under alternate stress effect, although
The stress that part is born is lower than the yield point of material, but can crack after the work of long period or break suddenly
It splits, which is referred to as fatigue.The fatigue properties of material have become one of the important indicator for measuring its service performance, therefore right
The fatigue properties of material, which are tested, has very important significance to engineer application.
Plain fatigue test is only capable of completion 106~107The fatigue behaviour of material in all underranges, however in many Ministry of Industry
Door (such as bullet train, automobile, aircraft etc.), the actual life of certain structures and part generally requires to reach 108~
1010Cycle, such as a high speed aero-turbine with 3000r/min operation will undergo 10 in service phase in 20 years10It is a
Cyclic Stress.However the loading frequency of plain fatigue testing equipment is no more than 200Hz, completion high-cycle fatigue test needs to consume huge
The big time, and then cause many high-cycle fatigue tests that can not even complete.
Ultrasonic fatigue be it is a kind of accelerate resonant fatigue test method, its test frequency (20kHz) considerably beyond
Plain fatigue test frequency (is less than 200Hz).The essence of ultrasonic fatigue is that mechanical resonant wave is established on being loaded style.Ultrasound
Fatigue Test Research shows many engineering material until 1010Still fatigue fracture, therefore 10 can occur after cycle Cyclic Stress7Week
Secondary fatigue data carries out fatigue design and is not able to satisfy many engineering actual demands.Use Ultrasonic fatigue testing skill
Art, loading frequency 20kHz are same to complete one time 109The fatigue test of cycle circulation only needs 14 hours of operation, can be smooth
Establish one 109The S-N curve of cycle circulation.
Ultrasonic fatigue testing equipment is to carry out the essential core equipment of Ultrasonic fatigue testing, at present about ultrasonic fatigue
The method and apparatus of test has carried out a large amount of early-stage study in the lab, has accurate test different materials attribute examination
The ability of part fatigue properties.Ultrasonic fatigue testing equipment realizes that the premise of resonance is displacement amplifier and the setting of test specimen intrinsic frequency
Unanimously, maintain essentially in ultrasonic transducer output mechanical frequency 20kHz a certain range, however due to theory error and
The many factors such as actual processing error, cause the practical intrinsic frequency of test specimen and displacement amplifier with theoretical intrinsic frequency
Deviation has seriously affected the accuracy of test.Related specifications are tested according to plain fatigue, fatigue test should apply one to test specimen
Determine the mean stress of range, and current Ultrasonic fatigue testing equipment hardly has the function.
Based on above-mentioned technical background, the present invention provides adaptive frequency formula Ultrasonic Fatigue Test-Bed, using PID control,
According to practical intrinsic frequency, adjust automatically displacement amplifier intrinsic frequency is tested, so that test and displacement amplifier remain
Identical intrinsic frequency is fully achieved resonance and requires, improves the accuracy of Ultrasonic fatigue testing；The present invention is provided with mean stress
Bringing device meets mean stress load demand.
Summary of the invention
The purpose of the present invention is: in order to solve the problems, such as Ultrasonic fatigue testing frequency adaptation and mean stress load, spy is mentioned
For a kind of adaptive frequency formula Ultrasonic Fatigue Test-Bed.
In order to achieve the above object, the invention adopts the following technical scheme: a kind of adaptive frequency formula Ultrasonic fatigue testing
Machine is by ultrasonic generating assembly, power output component, mean stress charging assembly, rear locking assembly, preceding locking assembly, locking
Output precision, rear fm components, preceding fm components, frequency modulation output precision, clutch transmission component a, clutch transmission component b, clutch
Transmission component c, clutch transmission component d, positioning vertical plate, guide rod a, leader fixed, guide rod b, preceding clutch mounting base, rear clutch peace
It fills seat and test specimen is constituted；Ultrasonic generating assembly includes energy converter, transducing positioning seat, rear locking nut, hold-down support, preceding locking screw
Female, displacement amplifier；Power output component includes servo motor, retarder, shaft coupling, drive joint, thrust bearing a, thrust
Bearing b, power output gear, turn-screw；Mean stress charging assembly include pulling force screw rod, load support, pallet, sliding sleeve a,
Sliding panel, load support, load transducer, sliding sleeve b, anti-pivoted arm, sliding sleeve c, thrust bush, feed screw nut；Locking assembly packet afterwards
It includes rear lock shaft, lock bevel gear, rear locking gear afterwards；Preceding locking assembly includes preceding lock shaft, preceding locking bevel gear, preceding locking
Gear；Locking output precision includes locking output bevel gear wheel a, locking input gear, locking output shaft, locking output bevel gear wheel b；
Fm components include rear frequency modulation gear, rear frequency modulation axis, rear frequency modulation bevel gear afterwards；Preceding fm components include preceding frequency modulation axis, preceding frequency modulation
Bevel gear, preceding frequency modulation gear；Frequency modulation output precision includes frequency modulation output bevel gear wheel a, frequency modulation input gear, frequency modulation output shaft, adjusts
Frequency output bevel gear wheel b；The structure group of clutch transmission component a, clutch transmission component b, clutch transmission component c, clutch transmission component d
It include clutch output bevel gear wheel, output gear shaft, electromagnet, spring, exhausted magnetic splined shaft, magnetic conduction spline housing, exhausted magnetic at identical
Gear shaft, clutch input bevel gear；Its structure feature is: guide rod a and guide rod b outer circle both ends are provided with Step Shaft, guide rod a and lead
The both ends bar b outer circle is set as male thread；Positioning vertical plate is mounted on the rear end step axis of guide rod a and guide rod b, leader fixed peace
On guide rod a and the front end guide rod b Step Shaft；Nut check is used at the both ends of guide rod a and guide rod b respectively, positions vertical plate and guide rod
Fixing seat is fixedly connected with rack respectively；In ultrasonic generating assembly, energy converter can be the electricity of supersonic frequency generator output
Signal is converted into mechanical oscillation signal output, and energy converter front end and transducing positioning base rear end are fastened with Stud connection；Transducing positioning
Seat front end inner cavity is set as box thread, and transducing positioning seat outer circle front end is set as gear structure；Locking nut inner cavity is set as afterwards
Box thread, outside are set as gear structure；Preceding locking nut inner cavity is set as box thread, and outside is set as gear structure；It is fixed
It is set as flange arrangement in the middle part of support, six through-holes are uniformly arranged on flange arrangement, hold-down support outer circle both ends are set as public spiral shell
Line structure；Displacement amplifier rear end inner cavity is set as box thread, and displacement amplifier outer circle rear end is set as gear structure, and displacement is put
Big device front end outline diameter is less than rear end outline diameter, and displacement amplifier front end is provided with threaded hole；Locking nut is mounted on afterwards
On the male thread of hold-down support rear end, transducing positioning seat front end box thread and the cooperation of hold-down support rear end male thread；Preceding locking nut
It is mounted on the male thread of hold-down support front end, displacement amplifier rear end and the cooperation of hold-down support front end male thread；It is sent out in ultrasound
It gives birth in component, the intrinsic frequency of transducing positioning seat, hold-down support and displacement amplifier is 20kHz, and adjustment transducing positioning seat is consolidated
That determines support and displacement amplifier link position screws size, and the intrinsic frequency that can effectively adjust excusing from death generating assembly entirety exists
Adjustment, is allowed to match the practical intrinsic frequency of test specimen, and can be always ensured that hold-down support central flange structure bit in a certain range
In on resonance wave zero shift face；Flange arrangement in the middle part of hold-down support is screwed on positioning vertical plate top；Preceding clutch installation
Seat is screwed in positioning vertical plate front end face, and rear clutch mounting base is screwed in positioning vertical plate rear end face；It is defeated in power
Out in component, servo motor and retarder rear end are screwed, and retarder front end and rear clutch mounting base are screwed, and are subtracted
The output shaft of fast device passes through the through-hole at rear clutch mounting base rear portion；Shaft coupling rear end and the transmission of reducer output shaft flat key, shaft coupling
Device front end and the transmission of drive joint rear end flat key；Turn-screw outer circle front is set as screw structure, turn-screw outer circle middle part
It is provided with keyway, turn-screw rear end is set as screw thread；Power output gear is connected in the middle part of turn-screw outer circle with flat key, is pushed away
Power bearing a and thrust bearing b is separately mounted in the outer circle of turn-screw rear portion, drive joint front end and turn-screw rear end screw thread
It fastens；Turn-screw passes through positioning vertical plate middle through-hole, thrust bearing a and positioning vertical plate rear end face fitting, thrust bearing b and fixed
Position vertical plate front end face fitting；In mean stress charging assembly, load support inner cavity is set as stepped hole, loads support and sliding
The connection of plate upper flange, pulling force screw rod are placed in load support inner cavity stepped hole；Pallet and sliding panel screws tighten, pallet
It is mounted on load support lower position；Sliding sleeve a outer circle and the cooperation of sliding panel upper through-hole, sliding sleeve a and sliding panel are screwed；
Sliding sleeve b and the cooperation of sliding panel lower through-hole, sliding sleeve b and sliding panel are screwed；Load transducer is spoke structure, load
Screw thread fastens in the middle part of sensor inner cavity and load support outer circle, uses screws tighten in the middle part of load transducer and sliding panel；Load branch
Base rear end and thrust bush front end screws tighten；Sliding sleeve c is mounted in anti-pivoted arm lower through-hole, sliding sleeve c and anti-pivoted arm spiral shell
Nail is fixed, and anti-pivoted arm upper end and thrust bush outer circle are screwed；Feed screw nut outer circle cooperates in thrust bush inner cavity front,
Feed screw nut and thrust bush are screwed；Feed screw nut and the cooperation of the screw structure of turn-screw front, constitute lead screw spiral shell
Female secondary, the inner cavity sliding sleeve a covers in guide rod a outer circle, and the inner cavity of sliding sleeve b and sliding sleeve c are respectively fitted in guide rod b outer circle；Clutch transmission
Component a, clutch transmission component b, clutch transmission component c, the structure composition of clutch transmission component d are identical, clutch output bevel gear wheel
With output gear shaft upper end screws tighten；Exhausted magnetic splined shaft is made of exhausted magnetic material, is provided in the middle part of exhausted magnetic splined shaft outer circle
Step, exhausted magnetic splined shaft outer circle lower end are set as axis spline；Electromagnet is mounted on exhausted magnetic splined shaft outer circle middle bench, exhausted magnetic
Splined shaft upper end and output gear shaft lower end screw thread fasten, and spring pocket is in exhausted magnetic splined shaft outer circle lower part；Clutch inputs bevel gear
With exhausted magnetic gear shaft lower end screws tighten；Exhausted magnetic gear shaft outer circle upper end is set as axis spline；Magnetic conduction spline applies magnetic conduction material
Material is made, and magnetic conduction spline housing inner cavity is set as stepped hole, and magnetic conduction spline housing inner cavity lower part is set as hole spline；In magnetic conduction spline housing
Chamber bottom hole spline and the cooperation of exhausted magnetic gear shaft outer circle upper shaft spline gaps, slide axially flexibly；Clutch transmission component a and from
It closes transmission component c to be separately mounted in rear clutch mounting base, before clutch transmission component b and clutch transmission component d are separately mounted to
In clutch mounting base；In locking output precision, locking output bevel gear wheel a and locking output shaft front end screws tighten, locking
Output bevel gear wheel b and locking output shaft rear end screws tighten, locking input gear and locking output shaft front key connection；Lock
Before tight output shaft front end is mounted on bearing in clutch mounting base mounting hole, locking output shaft rear end is mounted on rear clutch with bearing
In mounting base mounting hole；Input gear and power output gear engagement are locked, output bevel gear wheel a and clutch transmission component b is locked
In clutch input bevel gear engagement, lock output bevel gear wheel b and clutch transmission component a in clutch input bevel gear engagement；
In frequency modulation output precision, frequency modulation output bevel gear wheel a and frequency modulation output shaft front end screws tighten, frequency modulation output bevel gear wheel b and
Frequency modulation exports shaft rear end screws tighten, frequency modulation input gear and frequency modulation output shaft front key connection；Frequency modulation output shaft front end
Before being mounted on bearing in clutch mounting base mounting hole, frequency modulation exports shaft rear end and is mounted on rear clutch mounting base mounting hole with bearing
It is interior；Frequency modulation input gear and power output gear engage, the clutch input in frequency modulation output bevel gear wheel a and clutch transmission component d
Bevel gear engages, the clutch input bevel gear engagement in frequency modulation output bevel gear wheel b and clutch transmission component c；In rear locking assembly
In, it is rear to lock bevel gear and rear lock shaft rear portion screws tighten, rear locking gear and rear lock shaft front key connection；After lock
Tight gear and the engagement of rear locking nut, the rear clutch output bevel gear wheel engagement locked in bevel gear and clutch transmission component a；After lock
Mandrel front end is mounted in positioning vertical plate mounting hole with bearing, and rear locking shaft rear end is mounted on rear clutch mounting base with bearing and installs
In hole；In preceding locking assembly, preceding locking bevel gear and preceding lock shaft front screws tighten, preceding locking gear and preceding lock shaft
Rear portion key connection；Locking nut engages before preceding locking gear, the clutch output in preceding locking bevel gear and clutch transmission component b
Bevel gear engagement；Before preceding lock shaft front end is mounted on bearing in clutch mounting base mounting hole, preceding locking shaft rear end is pacified with bearing
In positioning vertical plate mounting hole；In rear fm components, rear frequency modulation gear and rear frequency modulation axis rear portion key connection, rear frequency modulation cone
Gear and rear frequency modulation axis front screws tighten；Frequency modulation gear and the engagement of transducing positioning seat front end gear structure afterwards, rear frequency modulation cone
Clutch output bevel gear wheel engagement in gear and clutch transmission component c；Frequency modulation axis front end is mounted on positioning vertical plate peace with bearing afterwards
It fills in hole, rear frequency modulation shaft rear end is mounted in rear clutch mounting base mounting hole with bearing；In preceding fm components, preceding frequency modulation bores tooth
Wheel and preceding frequency modulation axis front screws tighten, preceding frequency modulation gear and preceding frequency modulation axis rear portion key connection；Preceding frequency modulation gear and displacement
Amplifier rear end gear structure engages, the clutch output bevel gear wheel engagement in preceding frequency modulation bevel gear and clutch transmission component d；Preceding tune
Before frequency axis front end is mounted on bearing in clutch mounting base mounting hole, preceding frequency modulation shaft rear end is mounted on positioning vertical plate with bearing and installs
In hole；Test specimen rear end and displacement amplifier front end are fastened with stud, when carrying out compression mean stress load test, load support
It directly withstands on test specimen front end and applies compression load, when carrying out tension mean stress load test, test specimen front end and pulling force spiral shell
Rod rear end screw-thread securing, load support pull pulling force screw rod to apply tensile stress load.
In this adaptive frequency formula Ultrasonic Fatigue Test-Bed, adjustment transducing positioning seat, hold-down support and displacement amplifier
Link position screws size, is always ensured that after transducing positioning seat, hold-down support and displacement amplifier screw fastening and whole consolidates
Have that frequency is consistent with test specimen intrinsic frequency, transducing positioning seat, hold-down support and displacement amplifier screw whole axial long after fastening
Degree is n/2 resonance wave wavelength, and the axial length for loading support is (2n+1)/4 resonance wave wavelength, and wherein n is natural number；Gu
Determine at support and positioning vertical plate joint face position, resonance wave-amplitude is zero；It loads at support and sliding panel joint face position, resonance
Wave-amplitude is zero；Test specimen intermediate cross-section resonance wave-amplitude is zero, and internal stress is maximum, is fatigue fracture face.
The beneficial effects of the present invention are: (1) present invention can realize the mean stress load in Ultrasonic fatigue testing, make
Ultrasonic fatigue testing is more complete, has further widened the test scope of Ultrasonic fatigue testing；(2) present invention uses PID closed loop
Adjust automatically ultrasound generating assembly intrinsic frequency and the matching of test specimen intrinsic frequency are controlled, Ultrasonic fatigue testing essence is effectively increased
Degree, guarantee test data validity；(3) present invention is controlled using electric signal, compares conventional electro-hydraulic servo fatigue testing machine, power consumption
Small, control precision is high；(4) the achievable 20kHz frequency fatigue test of the present invention, effectively shortens Fatigue Test Time, can be efficiently complete
At 1010Cycle testing fatigue；(5) present invention can adapt to automatically according to test specimen intrinsic frequency, reduce the requirement to test specimen, greatly
Experimentation cost is reduced greatly.
Detailed description of the invention
Fig. 1 is a kind of three-dimensional structure structural schematic diagram of adaptive frequency formula Ultrasonic Fatigue Test-Bed of the present invention；
Fig. 2 is a kind of structural schematic diagram of adaptive frequency formula Ultrasonic Fatigue Test-Bed of the present invention；
Fig. 3 is the top view of Fig. 2；
Fig. 4 is the cross-sectional view in the section Fig. 2A-A；
Fig. 5 is the cross-sectional view of Fig. 3 section B-B；
Fig. 6 is the cross-sectional view in the section Fig. 3 C-C；
Fig. 7 is the cross-sectional view in the section Fig. 3 D-D；
Fig. 8 is the three dimensional structure diagram of ultrasonic generating assembly；
Fig. 9 is the three dimensional structure diagram of screw pair；
Figure 10 is the three dimensional structure diagram of clutch transmission component a
In figure: locking group behind 01. ultrasonic generating assembly, 02. power output component, 03. mean stress charging assembly, 04.
Fm components before fm components, 08. behind locking assembly before part, 05., 06. locking output precision, 07., 09. frequency modulation output precision,
31. clutch transmission component a, 32. clutch transmission component b, 33. clutch transmission component c, 34. clutch transmission component d, 11. positioning are vertical
Clutch mounting base behind clutch mounting base, 16. before plate, 12. guide rod a, 13. leader fixed, 14. guide rod b, 15., 17. test specimens,
Locking nut, 016. are displaced before locking nut, 014. hold-down support, 015. behind 011. energy converter, 012. transducing positioning seat, 013.
Amplifier, 021. servo motor, 022. retarder, 023. shaft coupling, 024. drive joint, 025. thrust bearing a, 026. thrust
Bearing b, 027. power output gear, 028. turn-screw, 031. pulling force screw rod, 032. load support, 033. pallet, 034. are slided
Cover a, 035. sliding panel, 036. load support, 037. load transducer, 038. sliding sleeve b, 039. anti-pivoted arm, 0310. sliding sleeve c,
Bevel gear, locking gear, 051. after 043. are locked behind 0311. thrust bush, 0312. feed screw nut, 041. behind lock shaft, 042.
Locking gear, 061. locking output bevel gear wheel a, 062. locking input tooth before locking bevel gear, 053. before preceding lock shaft, 052.
Wheel, 063. locking output shaft, 064. locking output bevel gear wheel b, frequency modulation behind frequency modulation axis, 073. behind frequency modulation gear, 072. after 071.
Frequency modulation gear, 091. frequency modulation output bevel gear wheel a, 092. before frequency modulation bevel gear, 083. before frequency modulation axis, 082. before bevel gear, 081.
Frequency modulation input gear, 093. frequency modulation output shaft, 094. frequency modulation output bevel gear wheel b, 301. clutch output bevel gear wheels, 302. output gears
Wheel shaft, 303. electromagnet, 304. springs, 305. exhausted magnetic splined shafts, 306. magnetic conduction spline housings, 307. exhausted magnetic gear shafts, 308. from
Close input gear.
Specific embodiment
As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5, Fig. 6 and Fig. 7, a kind of adaptive frequency formula Ultrasonic fatigue testing of the present invention
Machine is by ultrasonic generating assembly 01, power output component 02, mean stress charging assembly 03, rear locking assembly 04, preceding locking group
Part 05, locking output precision 06, rear fm components 07, preceding fm components 08, frequency modulation output precision 09, clutch transmission component a31,
It is clutch transmission component b32, clutch transmission component c33, clutch transmission component d34, positioning vertical plate 11, guide rod a12, leader fixed
13, guide rod b14, preceding clutch mounting base 15, rear clutch mounting base 16 and test specimen 17 are constituted；Ultrasonic generating assembly 01 includes energy converter
011, transducing positioning seat 012, rear locking nut 013, hold-down support 014, preceding locking nut 015, displacement amplifier 016；Power
Output precision 02 includes servo motor 021, retarder 022, shaft coupling 023, drive joint 024, thrust bearing a025, thrust axis
Hold b026, power output gear 027, turn-screw 028；Mean stress charging assembly 03 includes pulling force screw rod 031, load support
032, pallet 033, sliding sleeve a034, sliding panel 035, load support 036, load transducer 037, sliding sleeve b038, anti-pivoted arm 039,
Sliding sleeve c0310, thrust bush 0311, feed screw nut 0312；Locking assembly 04 includes rear lock shaft 041, locks bevel gear afterwards afterwards
042, rear locking gear 043；Preceding locking assembly 05 includes preceding lock shaft 051, preceding locking bevel gear 052, preceding locking gear 053；
Locking output precision 06 includes locking output bevel gear wheel a061, locking input gear 062, locking output shaft 063, locking output cone
Gear b064；Fm components 07 include rear frequency modulation gear 071, rear frequency modulation axis 072, rear frequency modulation bevel gear 073 afterwards；Preceding fm components
08 includes preceding frequency modulation axis 081, preceding frequency modulation bevel gear 082, preceding frequency modulation gear 083；Frequency modulation output precision 09 includes frequency modulation output cone
Gear a091, frequency modulation input gear 092, frequency modulation output shaft 093, frequency modulation output bevel gear wheel b094；Clutch transmission component a31, from
It is identical to close transmission component b32, clutch transmission component c33, the structure composition of clutch transmission component d34, includes clutch output cone
Gear 301, output gear shaft 302, electromagnet 303, spring 304, exhausted magnetic splined shaft 305, magnetic conduction spline housing 306, exhausted magnetic gear
Axis 307, clutch input bevel gear 308.
Guide rod a12 and guide rod b14 outer circle both ends are provided with Step Shaft, and guide rod a12 and the both ends guide rod b14 outer circle are set as public
Screw thread；Positioning vertical plate 11 is mounted on the rear end step axis of guide rod a12 and guide rod b14, and leader fixed 13 are mounted on guide rod a12
On the Step Shaft of the front end guide rod b14；Nut check is used at the both ends of guide rod a12 and guide rod b14 respectively, positions vertical plate 11 and guide rod is solid
Reservation 13 is fixedly connected with rack respectively；Preceding clutch mounting base 15 is screwed in positioning 11 front end face of vertical plate, rear clutch peace
Dress seat 16 is screwed in positioning 11 rear end face of vertical plate.
As shown in figure 8, energy converter 011 can be the telecommunications of supersonic frequency generator output in ultrasonic generating assembly 01
It number is converted into mechanical oscillation signal output, 011 front end of energy converter and 012 rear end of transducing positioning seat are fastened with Stud connection；Transducing
012 front end inner cavity of positioning seat is set as box thread, and 012 outer circle front end of transducing positioning seat is set as gear structure；Locking nut afterwards
013 inner cavity is set as box thread, and outside is set as gear structure；Preceding 015 inner cavity of locking nut is set as box thread, outside setting
For gear structure；It is set as flange arrangement in the middle part of hold-down support 014, six through-holes, hold-down support are uniformly arranged on flange arrangement
014 outer circle both ends are set as male thread forms；016 rear end inner cavity of displacement amplifier is set as box thread, outside displacement amplifier 016
Circle rear end is set as gear structure, and 016 front end outline diameter of displacement amplifier is less than rear end outline diameter, displacement amplifier 016
Front end is provided with threaded hole；Locking nut 013 is mounted on 014 rear end male thread of hold-down support afterwards, 012 front end of transducing positioning seat
Box thread and the cooperation of 014 rear end male thread of hold-down support；Preceding locking nut 015 is mounted on the male thread of 014 front end of hold-down support
On, 016 rear end of displacement amplifier and the cooperation of 014 front end male thread of hold-down support；In ultrasonic generating assembly 01, transducing positioning seat
012, the intrinsic frequency of hold-down support 014 and displacement amplifier 016 is 20kHz, adjusts transducing positioning seat 012, hold-down support
014 and 016 link position of displacement amplifier screw size, can effectively adjust the whole intrinsic frequency of ultrasonic generating assembly 01
It adjusts in a certain range, is allowed to match the practical intrinsic frequency of test specimen 17, and can be always ensured that 014 central flange of hold-down support
Structure is located on resonance wave zero shift face；The flange arrangement at 014 middle part of hold-down support is screwed on positioning 11 top of vertical plate.
As shown in figure 9, servo motor 021 and 022 rear end of retarder are screwed in power output component 02, subtract
Fast 022 front end of device and rear clutch mounting base 16 are screwed, and the output shaft of retarder 022 passes through rear 16 rear portion of clutch mounting base
Through-hole；023 rear end of shaft coupling and the transmission of 022 output shaft flat key of retarder, 024 rear end of 023 front end of shaft coupling and drive joint
Flat key transmission；028 outer circle front of turn-screw is set as screw structure, is provided with keyway in the middle part of 028 outer circle of turn-screw, is driven
028 rear end of lead screw is set as screw thread；Power output gear 027 is connected in the middle part of 028 outer circle of turn-screw with flat key, thrust bearing
A025 and thrust bearing b026 is separately mounted in 028 rear portion outer circle of turn-screw, 024 front end of drive joint and turn-screw
028 rear end screw-thread securing；Turn-screw 028 is after positioning 11 middle through-hole of vertical plate, thrust bearing a025 and positioning vertical plate 11
End face fitting, thrust bearing b026 and positioning 11 front end face of vertical plate fitting；In mean stress charging assembly 03, support is loaded
032 inner cavity is set as stepped hole, and load support 032 is connected with 035 upper flange of sliding panel, and pulling force screw rod 031 is placed in load
In 032 inner cavity stepped hole of support；Pallet 033 and the screws tighten of sliding panel 035, pallet 033 are mounted on 032 lower section of load support
Position；Sliding sleeve a034 outer circle and the cooperation of 035 upper through-hole of sliding panel, sliding sleeve a034 and sliding panel 035 are screwed；Sliding sleeve
B038 and the cooperation of 035 lower through-hole of sliding panel, sliding sleeve b038 and sliding panel 035 are screwed；Load transducer 037 is spoke
Formula structure, 037 inner cavity of load transducer and 036 outer circle of load support middle part screw thread fasten, load transducer 037 and sliding panel
Use screws tighten in 035 middle part；0311 front end screws tighten of 036 rear end of load support and thrust bush；Sliding sleeve c0310 is mounted on
In anti-039 lower through-hole of pivoted arm, sliding sleeve c0310 and anti-pivoted arm 039 are screwed, anti-039 upper end of pivoted arm and thrust bush
0311 outer circle is screwed；0312 outer circle of feed screw nut cooperates in 0311 inner cavity front of thrust bush, 0312 He of feed screw nut
Thrust bush 0311 is screwed；The screw structure of 028 front of feed screw nut 0312 and turn-screw cooperates, and constitutes lead screw spiral shell
Female secondary, the inner cavity sliding sleeve a034 covers in guide rod a12 outer circle, and the inner cavity of sliding sleeve b038 and sliding sleeve c0310 are respectively fitted over outside guide rod b14
On circle.
As shown in Figure 10, clutch transmission component a31, clutch transmission component b32, clutch transmission component c33, clutch transmission group
The structure composition of part d34 is identical, 302 upper end screws tighten of clutch output bevel gear wheel 301 and output gear shaft；Exhausted magnetic splined shaft
305 are made of exhausted magnetic material, are provided with step in the middle part of exhausted 305 outer circle of magnetic splined shaft, exhausted 305 outer circle lower end of magnetic splined shaft is set as
Axis spline；Electromagnet 303 is mounted on exhausted 305 outer circle middle bench of magnetic splined shaft, exhausted 305 upper end of magnetic splined shaft and output gear
302 lower end screw thread of axis fastens, and 304 sets of spring in exhausted 305 outer circle lower part of magnetic splined shaft；Clutch inputs bevel gear 308 and exhausted magnetic tooth
307 lower end screws tighten of wheel shaft；Exhausted magnetic gear shaft 307 is made of exhausted magnetic material, and exhausted 307 outer circle upper end of magnetic gear shaft is set as
Axis spline；Magnetic conduction spline housing 306 is made of permeability magnetic material, and 306 inner cavity of magnetic conduction spline housing is set as stepped hole, magnetic conduction spline housing
306 inner cavities lower part are set as hole spline；306 inner cavity bottom hole spline of magnetic conduction spline housing and 307 outer circle upper shaft of exhausted magnetic gear shaft
Spline gaps cooperation, slides axially flexibly.
Clutch transmission component a31 and clutch transmission component c33 are separately mounted in rear clutch mounting base 16, clutch transmission group
Before part b32 and clutch transmission component d34 is separately mounted in clutch mounting base 15；In locking output precision 06, locking output
Bevel gear a061 and locking 063 front end screws tighten of output shaft, locking output bevel gear wheel b064 and locking 063 rear end of output shaft
With screws tighten, input gear 062 and locking 063 front of output shaft key connection are locked；Lock 063 front end bearing of output shaft
Before being mounted in 15 mounting hole of clutch mounting base, locking 063 rear end of output shaft is mounted on rear clutch mounting base 16 with bearing and installs
In hole；It locks input gear 062 and power output gear 027 engages, lock output bevel gear wheel a061 and clutch transmission component b32
In clutch input bevel gear 308 engage, lock output bevel gear wheel b064 and clutch transmission component a31 in clutch input cone tooth
308 engagement of wheel；In frequency modulation output precision 09,093 front end screws tighten of frequency modulation output bevel gear wheel a091 and frequency modulation output shaft,
093 rear end screws tighten of frequency modulation output bevel gear wheel b094 and frequency modulation output shaft, frequency modulation input gear 092 and frequency modulation output shaft
093 front key connection；Before 093 front end of frequency modulation output shaft is mounted on bearing in 15 mounting hole of clutch mounting base, frequency modulation output
093 rear end of axis is mounted in rear 16 mounting hole of clutch mounting base with bearing；Frequency modulation input gear 092 and power output gear 027
It engages, the clutch input bevel gear 308 in frequency modulation output bevel gear wheel a091 and clutch transmission component d34 engages, frequency modulation output cone
Clutch input bevel gear 308 in gear b094 and clutch transmission component c33 engages；In rear locking assembly 04, rear locking cone
041 rear portion screws tighten of gear 042 and rear lock shaft, rear locking gear 043 and 041 front of rear lock shaft key connection；Afterwards
Locking gear 043 and rear locking nut 013 engage, and the rear clutch locked in bevel gear 042 and clutch transmission component a31 exports cone
Gear 301 engages；041 front end of lock shaft is mounted in positioning 11 mounting hole of vertical plate with bearing afterwards, rear 041 rear end axis of lock shaft
It holds and is mounted in rear 16 mounting hole of clutch mounting base；In preceding locking assembly 05, preceding locking bevel gear 052 and preceding lock shaft 051
Front screws tighten, preceding locking gear 053 and 051 rear portion of preceding lock shaft key connection；Preceding locking gear 053 and preceding locking screw
Mother 015 engages, and the clutch output bevel gear wheel 301 in preceding locking bevel gear 052 and clutch transmission component b32 engages；Preceding lock shaft
Before 051 front end is mounted on bearing in 15 mounting hole of clutch mounting base, preceding 051 rear end of lock shaft is mounted on positioning vertical plate with bearing
In 11 mounting holes；In rear fm components 07, rear frequency modulation gear 071 and rear 072 rear portion of frequency modulation axis key connection, rear frequency modulation bore tooth
Wheel 073 and 072 front screws tighten of rear frequency modulation axis；Frequency modulation gear 071 and 012 front end gear structure of transducing positioning seat are nibbled afterwards
It closes, the clutch output bevel gear wheel 301 in rear frequency modulation bevel gear 073 and clutch transmission component c33 engages；072 front end of frequency modulation axis afterwards
It is mounted in positioning 11 mounting hole of vertical plate with bearing, rear 072 rear end of frequency modulation axis is mounted on rear clutch mounting base 16 with bearing and installs
In hole；In preceding fm components 08,081 front screws tighten of preceding frequency modulation bevel gear 082 and preceding frequency modulation axis, preceding frequency modulation gear
083 and preceding 081 rear portion of frequency modulation axis key connection；Preceding frequency modulation gear 083 and the engagement of 016 rear end gear structure of displacement amplifier, it is preceding
Clutch output bevel gear wheel 301 in frequency modulation bevel gear 082 and clutch transmission component d34 engages；Preceding 081 front end bearing of frequency modulation axis
Before being mounted in 15 mounting hole of clutch mounting base, preceding 081 rear end of frequency modulation axis is mounted in positioning 11 mounting hole of vertical plate with bearing；Examination
17 rear end of part and 016 front end of displacement amplifier are fastened with stud, when carrying out compression mean stress load test, load support
032 directly withstand on 17 front end of test specimen apply compression load, when carrying out tension mean stress load test, 17 front end of test specimen and
031 rear end screw-thread securing of pulling force screw rod, load support 032 pull pulling force screw rod 031 to apply tensile stress load.
In this adaptive frequency formula Ultrasonic Fatigue Test-Bed, adjustment transducing positioning seat 012, hold-down support 014 and displacement
016 link position of amplifier screws size, is always ensured that transducing positioning seat, hold-down support 014 and displacement amplifier 016 screw
Whole intrinsic frequency is consistent with 17 intrinsic frequency of test specimen after fastening, transducing positioning seat, hold-down support 014 and displacement amplifier
016 screw fastening after whole axial length be n/2 resonance wave wavelength, load the axial length of support 032 as (2n+1)/4
Resonance wave wavelength, wherein n is natural number；At hold-down support 014 and positioning 11 joint face position of vertical plate, resonance wave-amplitude is zero；
It loads at support 032 and 035 joint face position of sliding panel, resonance wave-amplitude is zero；17 intermediate cross-section resonance wave-amplitude of test specimen is
Zero, internal stress is maximum, is fatigue fracture face.
A kind of adaptive frequency formula Ultrasonic Fatigue Test-Bed of the present invention uses PID closed-loop control, is carrying out ultrasonic fatigue examination
During testing, according to Feedback of Power, the intrinsic frequency and supersonic frequency generator output letter of ultrasonic generating assembly are quickly adjusted
Number frequency, to match the true intrinsic frequency demand of test specimen；Concrete operating principle is using servo motor as power output, through subtracting
Fast device obtains enough output torques and drives 028 positive and negative rotation of turn-screw, and power output gear 027 transmits movement transmitting respectively
To frequency modulation output precision 09 and locking output precision 06；Clutch transmission component a31, clutch transmission component b32, clutch transmission component
C33, clutch transmission component d34 are adsorbed using electromagnet 303 and are discharged magnetic conduction spline housing 306 and realize clutch function, and then can be with
Locking assembly 04, preceding locking assembly 05, rear fm components 07 and the movement of preceding fm components 08 and stopping, Jin Erda after controlling respectively
Size is screwed to adjustment transducing positioning seat 012,016 link position of hold-down support 014 and displacement amplifier, is changed whole intrinsic
The effect of frequency, and the state is locked and is kept；Feed screw nut is constituted also with turn-screw 028 and feed screw nut 0312
The linear motion of sliding panel may be implemented in pair, so as to realize the effect for applying drawing, compression load to test specimen 17, and benefit
Real-time monitoring and feedback are carried out with load transducer 037.
Claims (3)
1. a kind of adaptive frequency formula Ultrasonic Fatigue Test-Bed is by ultrasonic generating assembly (01), power output component (02), puts down
Equal stress charging assembly (03), rear locking assembly (04), preceding locking assembly (05), locking output precision (06), rear fm components
(07), preceding fm components (08), frequency modulation output precision (09), clutch transmission component a (31), clutch transmission component b (32), clutch
Transmission component c (33), clutch transmission component d (34), positioning vertical plate (11), guide rod a (12), leader fixed (13), guide rod b
(14), preceding clutch mounting base (15), rear clutch mounting base (16) and test specimen (17) are constituted；Ultrasonic generating assembly (01) includes transducing
Device (011), transducing positioning seat (012), rear locking nut (013), hold-down support (014), preceding locking nut (015), displacement are put
Big device (016)；Power output component (02) includes servo motor (021), retarder (022), shaft coupling (023), drive joint
(024), thrust bearing a (025), thrust bearing b (026), power output gear (027), turn-screw (028)；Mean stress
Charging assembly (03) include pulling force screw rod (031), load support (032), pallet (033), sliding sleeve a (034), sliding panel (035),
Load support (036), load transducer (037), sliding sleeve b (038), anti-pivoted arm (039), sliding sleeve c (0310), thrust bush
(0311), feed screw nut (0312)；Locking assembly (04) includes rear lock shaft (041), locks bevel gear (042), rear lock afterwards afterwards
Tight gear (043)；Preceding locking assembly (05) includes preceding lock shaft (051), preceding locking bevel gear (052), preceding locking gear
(053)；Locking output precision (06) includes locking output bevel gear wheel a (061), locking input gear (062), locking output shaft
(063), output bevel gear wheel b (064) is locked；Afterwards fm components (07) include rear frequency modulation gear (071), rear frequency modulation axis (072), after
Frequency modulation bevel gear (073)；Preceding fm components (08) include preceding frequency modulation axis (081), preceding frequency modulation bevel gear (082), preceding frequency modulation gear
(083)；Frequency modulation output precision (09) includes frequency modulation output bevel gear wheel a (091), frequency modulation input gear (092), frequency modulation output shaft
(093), frequency modulation output bevel gear wheel b (094)；Clutch transmission component a (31), clutch transmission component b (32), clutch transmission component c
(33), the structure composition of clutch transmission component d (34) is identical, includes clutch output bevel gear wheel (301), output gear shaft
(302), electromagnet (303), spring (304), exhausted magnetic splined shaft (305), magnetic conduction spline housing (306), exhausted magnetic gear shaft (307),
Clutch inputs bevel gear (308)；It is characterized by: guide rod a (12) and guide rod b (14) outer circle both ends are provided with Step Shaft, guide rod a
(12) and guide rod b (14) both ends outer circle is set as male thread；Positioning vertical plate (11) is mounted on guide rod a's (12) and guide rod b (14)
On rear end step axis, leader fixed (13) are mounted on guide rod a (12) and guide rod b (14) front end Step Shaft；Guide rod a (12) and
Nut check is used at the both ends of guide rod b (14) respectively, and positioning vertical plate (11) and leader fixed (13) is fixedly connected with rack respectively；
In ultrasonic generating assembly (01), the electric signal that supersonic frequency generator exports can be converted into mechanical vibration by energy converter (011)
Dynamic signal output, energy converter (011) front end and transducing positioning seat (012) rear end are fastened with Stud connection；Transducing positioning seat (012)
Front end inner cavity is set as box thread, and transducing positioning seat (012) outer circle front end is set as gear structure；Afterwards in locking nut (013)
Chamber is set as box thread, and outside is set as gear structure；Preceding locking nut (015) inner cavity is set as box thread, and outside is set as
Gear structure；It is set as flange arrangement in the middle part of hold-down support (014), six through-holes, hold-down support are uniformly arranged on flange arrangement
(014) outer circle both ends are set as male thread forms；Displacement amplifier (016) rear end inner cavity is set as box thread, displacement amplifier
(016) outer circle rear end is set as gear structure, and displacement amplifier (016) front end outline diameter is less than rear end outline diameter, displacement
Amplifier (016) front end is provided with threaded hole；Locking nut (013) is mounted on the male thread of hold-down support (014) rear end afterwards, is changed
It can positioning seat (012) front end box thread and the cooperation of hold-down support (014) rear end male thread；Preceding locking nut (015) is mounted on solid
On the male thread for determining support (014) front end, displacement amplifier (016) rear end and the cooperation of hold-down support (014) front end male thread；Gu
Determine the flange arrangement in the middle part of support (014) to be screwed on positioning vertical plate (11) top；Preceding clutch mounting base (15) uses screw
It is fixed on positioning vertical plate (11) front end face, rear clutch mounting base (16) is screwed in positioning vertical plate (11) rear end face；Dynamic
In power output precision (02), servo motor (021) and retarder (022) rear end are screwed, and retarder (022) front end is with after
Clutch mounting base (16) is screwed, and the output shaft of retarder (022) passes through the through-hole at rear clutch mounting base (16) rear portion；Connection
Axis device (023) rear end and retarder (022) output shaft flat key are driven, and are held level with both hands after shaft coupling (023) front end and drive joint (024)
Key transmission；Turn-screw (028) outer circle front is set as screw structure, is provided with keyway in the middle part of turn-screw (028) outer circle, passes
Dynamic lead screw (028) rear end is set as screw thread；Power output gear (027) is connected in the middle part of turn-screw (028) outer circle with flat key,
Thrust bearing a (025) and thrust bearing b (026) is separately mounted in the outer circle of turn-screw (028) rear portion, drive joint (024)
Front end and turn-screw (028) rear end screw-thread securing；Turn-screw (028) passes through positioning vertical plate (11) middle through-hole, thrust axis
Hold a (025) and positioning vertical plate (11) rear end face fitting, thrust bearing b (026) and positioning vertical plate (11) front end face fitting；Flat
In equal stress charging assembly (03), load support (032) inner cavity is set as stepped hole, loads support (032) and sliding panel (035)
Upper flange connection, pulling force screw rod (031) are placed in load support (032) inner cavity stepped hole；Pallet (033) and sliding panel
(035) screws tighten is used, pallet (033) is mounted on load support (032) lower position；Sliding sleeve a (034) outer circle and sliding panel
(035) upper through-hole cooperates, and sliding sleeve a (034) and sliding panel (035) are screwed；Under sliding sleeve b (038) and sliding panel (035)
The cooperation of portion's through-hole, sliding sleeve b (038) and sliding panel (035) are screwed；Load transducer (037) is spoke structure, load
Screw thread fastens in the middle part of sensor (037) inner cavity and load support (036) outer circle, in load transducer (037) and sliding panel (035)
Portion's screws tighten；Load support (036) rear end and thrust bush (0311) front end screws tighten；Sliding sleeve c (0310) installation
In anti-pivoted arm (039) lower through-hole, sliding sleeve c (0310) and anti-pivoted arm (039) are screwed, anti-pivoted arm (039) upper end and
Thrust bush (0311) outer circle is screwed；Feed screw nut (0312) outer circle cooperates in thrust bush (0311) inner cavity front,
Feed screw nut (0312) and thrust bush (0311) are screwed；Feed screw nut (0312) and turn-screw (028) front
Screw structure cooperation, constitutes screw pair, and sliding sleeve a (034) inner cavity covers in guide rod a (12) outer circle, sliding sleeve b (038) and cunning
The inner cavity of set c (0310) is respectively fitted in guide rod b (14) outer circle；Clutch transmission component a (31) and clutch transmission component c (33) points
Be not mounted on rear clutch mounting base (16), clutch transmission component b (32) and clutch transmission component d (34) be separately mounted to before from
It closes on mounting base (15)；In locking output precision (06), output bevel gear wheel a (061) and locking output shaft (063) front end are locked
With screws tighten, output bevel gear wheel b (064) and locking output shaft (063) rear end screws tighten are locked, input gear is locked
(062) it is keyed with locking output shaft (063) front；Clutch installation before locking output shaft (063) front end is mounted on bearing
In seat (15) mounting hole, locking output shaft (063) rear end is mounted in rear clutch mounting base (16) mounting hole with bearing；It locks defeated
Enter gear (062) and power output gear (027) engagement, locks in output bevel gear wheel a (061) and clutch transmission component b (32)
Clutch input bevel gear (308) engagement, locking output bevel gear wheel b (064) and clutch transmission component a (31) in clutch input
Bevel gear (308) engagement；In frequency modulation output precision (09), before frequency modulation output bevel gear wheel a (091) and frequency modulation output shaft (093)
End screws tighten, frequency modulation output bevel gear wheel b (094) and frequency modulation output shaft (093) rear end screws tighten, frequency modulation input gear
(092) it is keyed with frequency modulation output shaft (093) front；Clutch installation before frequency modulation output shaft (093) front end is mounted on bearing
In seat (15) mounting hole, frequency modulation output shaft (093) rear end is mounted in rear clutch mounting base (16) mounting hole with bearing；Frequency modulation is defeated
Enter gear (092) and power output gear (027) engages, in frequency modulation output bevel gear wheel a (091) and clutch transmission component d (34)
Clutch input bevel gear (308) engagement, the clutch in frequency modulation output bevel gear wheel b (094) and clutch transmission component c (33) inputs
Bevel gear (308) engagement；In rear locking assembly (04), bevel gear (042) and rear lock shaft (041) rear portion screw is locked afterwards
It fastens, rear locking gear (043) and rear lock shaft (041) front key connection；Locking gear (043) and rear locking nut afterwards
(013) it engages, locks clutch output bevel gear wheel (301) engagement in bevel gear (042) and clutch transmission component a (31) afterwards；Afterwards
Lock shaft (041) front end is mounted in positioning vertical plate (11) mounting hole with bearing, and rear lock shaft (041) rear end is mounted on bearing
Afterwards in clutch mounting base (16) mounting hole；In preceding locking assembly (05), preceding locking bevel gear (052) and preceding lock shaft (051)
Front screws tighten, preceding locking gear (053) and preceding lock shaft (051) rear portion key connection；Preceding locking gear (053) and before
Locking nut (015) engagement, the preceding clutch output bevel gear wheel (301) locked in bevel gear (052) and clutch transmission component b (32)
Engagement；Before preceding lock shaft (051) front end is mounted on bearing in clutch mounting base (15) mounting hole, preceding lock shaft (051) rear end
It is mounted in positioning vertical plate (11) mounting hole with bearing；In rear fm components (07), rear frequency modulation gear (071) and rear frequency modulation axis
(072) rear portion is keyed, rear frequency modulation bevel gear (073) and rear frequency modulation axis (072) front screws tighten；Frequency modulation gear afterwards
(071) it is engaged with transducing positioning seat (012) front end gear structure, in rear frequency modulation bevel gear (073) and clutch transmission component c (33)
Clutch output bevel gear wheel (301) engagement；Frequency modulation axis (072) front end is mounted in positioning vertical plate (11) mounting hole with bearing afterwards,
Frequency modulation axis (072) rear end is mounted in rear clutch mounting base (16) mounting hole with bearing afterwards；In preceding fm components (08), preceding tune
Frequency bevel gear (082) and preceding frequency modulation axis (081) front screws tighten, preceding frequency modulation gear (083) and preceding frequency modulation axis (081) rear portion
With key connection；Preceding frequency modulation gear (083) and displacement amplifier (016) rear end gear structure engagement, preceding frequency modulation bevel gear (082) and
Clutch output bevel gear wheel (301) engagement in clutch transmission component d (34)；Before preceding frequency modulation axis (081) front end is mounted on bearing
In clutch mounting base (15) mounting hole, preceding frequency modulation axis (081) rear end is mounted in positioning vertical plate (11) mounting hole with bearing；Test specimen
(17) rear end and displacement amplifier (016) front end are fastened with stud, when carrying out compression mean stress load test, load support
(032) it directly withstands on test specimen (17) front end and applies compression load, when carrying out tension mean stress load test, test specimen (17)
Front end and pulling force screw rod (031) rear end screw-thread securing, load support (032) pull pulling force screw rod (031) to apply tensile stress load.
2. adaptive frequency formula Ultrasonic Fatigue Test-Bed according to claim 1, it is characterized in that: the ultrasound generating assembly
(01) in, adjust transducing positioning seat (012), hold-down support (014) and displacement amplifier (016) link position screws size,
It is always ensured that intrinsic frequency whole after transducing positioning seat (012), hold-down support (014) and displacement amplifier (016) screw fastening
Rate is consistent with test specimen (17) intrinsic frequency, and transducing positioning seat (012), hold-down support (014) and displacement amplifier (016) screw solid
Next entirety axial length is n/2 resonance wave wavelength, and the axial length of load support (032) is (2n+1)/4 resonance wave wave
Long, wherein n is natural number；At hold-down support (014) and positioning vertical plate (11) joint face position, resonance wave-amplitude is zero；Load
At support (032) and sliding panel (035) joint face position, resonance wave-amplitude is zero.
3. adaptive frequency formula Ultrasonic Fatigue Test-Bed according to claim 1, it is characterized in that: the clutch transmission component
A (31), clutch transmission component b (32), clutch transmission component c (33), the structure composition of clutch transmission component d (34) are identical, from
Close output bevel gear wheel (301) and output gear shaft (302) upper end screws tighten；The exhausted magnetic material system of exhausted magnetic splined shaft (305)
At exhausted magnetic splined shaft (305) outer circle middle part is provided with step, and exhausted magnetic splined shaft (305) outer circle lower end is set as axis spline；Electromagnetism
Iron (303) is mounted on exhausted magnetic splined shaft (305) outer circle middle bench, exhausted magnetic splined shaft (305) upper end and output gear shaft
(302) lower end screw thread fastens, and spring (304) is covered in exhausted magnetic splined shaft (305) outer circle lower part；Clutch input bevel gear (308) and
Exhausted magnetic gear shaft (307) lower end screws tighten；Exhausted magnetic gear shaft (307) is made of exhausted magnetic material, and exhausted magnetic gear shaft (307) is outside
Circle upper end is set as axis spline；Magnetic conduction spline housing (306) is made of permeability magnetic material, and magnetic conduction spline housing (306) inner cavity is set as platform
Rank hole, magnetic conduction spline housing (306) inner cavity lower part are set as hole spline；Magnetic conduction spline housing (306) inner cavity bottom hole spline and exhausted magnetic
The cooperation of gear shaft (307) outer circle upper shaft spline gaps, slides axially flexibly.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810006116.4A CN110361451A (en) | 2018-01-03 | 2018-01-03 | A kind of adaptive frequency formula Ultrasonic Fatigue Test-Bed |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810006116.4A CN110361451A (en) | 2018-01-03 | 2018-01-03 | A kind of adaptive frequency formula Ultrasonic Fatigue Test-Bed |
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| CN106501098A (en) * | 2016-10-18 | 2017-03-15 | 四川大学 | Multiaxial loading ultrasound torsional fatigue test device |
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| CN107703214A (en) * | 2017-11-20 | 2018-02-16 | 西南石油大学 | A kind of frequency-adjustable ultrasonic horn |
| CN107957448A (en) * | 2017-11-21 | 2018-04-24 | 西南石油大学 | A kind of ultrasonic fatigue mean stress loading device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB679484A (en) * | 1949-09-16 | 1952-09-17 | Nat Res Dev | Improvements in and relating to fatigue testing machines |
| CN105738236A (en) * | 2016-05-05 | 2016-07-06 | 西北工业大学 | Ultrasonic high-frequency ball wear fatigue test device |
| CN106501098A (en) * | 2016-10-18 | 2017-03-15 | 四川大学 | Multiaxial loading ultrasound torsional fatigue test device |
| CN107340190A (en) * | 2017-08-24 | 2017-11-10 | 吉林大学 | Multistage quiet Dynamic Coupling mechanical loading unit for high frequency fatigue test |
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Application publication date: 20191022 |