CN105738236A - Ultrasonic high-frequency ball wear fatigue test device - Google Patents
Ultrasonic high-frequency ball wear fatigue test device Download PDFInfo
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- CN105738236A CN105738236A CN201610290906.0A CN201610290906A CN105738236A CN 105738236 A CN105738236 A CN 105738236A CN 201610290906 A CN201610290906 A CN 201610290906A CN 105738236 A CN105738236 A CN 105738236A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/56—Investigating resistance to wear or abrasion
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0055—Generation of the force using mechanical waves, e.g. acoustic
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Abstract
The invention discloses an ultrasonic high-frequency ball wear fatigue test device. By the use of an ultrasonic loading mode, the ultra-long cycle fatigue lives of different ball test samples can be tested under the action of a wear load, and the ultra-long cycle fatigue performance of a vibration test piece can be tested under the action of a high-frequency vibrating and rolling wear composite load. A positioning screw drives two ball moving devices to oppositely move in the axial direction; a sliding plate drives an ultrasonic loading device to move along the longitudinal direction of a dovetail groove of a supporting plate, so as to precisely determine a relative position of the ball test sample and the longitudinal vibrating test piece; the longitudinal vibrating test piece bear a longitudinal vibrating high-frequency cyclic load and a rolling wear composite load, so that the ultra-long cycle fatigue performances of different vibrating test piece materials under the action of the composite load can be tested; a longitudinal contact position of the longitudinal vibrating test piece and the ball test sample is adjusted to load vibrating friction displacements with different sizes onto the ball test sample; the ball moving device is connected with a ball clamping device, so that an ultrasonic fatigue test on two ball test samples can be realized at one time.
Description
Technical field
The present invention relates to rolling friction contact fatigue life technical field of measurement and test, specifically, relate to a kind of test ball abrasion super high cycle fatigue life-span and the ultrasonic high frequency ball fretting fatigue assay device of Fatigue Life in Very High Cycle under vibration test specimen Rolling wear effect.
Background technology
At Aero-Space, railway traffic industrial circle, machine structural parts bears dither cyclic loading and the compound action of Rolling wear cyclic loading for a long time, and these load cycle cycles are up to 109～1011In week, belonging to Very High Cycle category, the complex injury caused under this Action of Combined Loads can greatly accelerate the fatigue rupture of mechanical structured member.So, carry out the super high cycle fatigue life test about high frequency Rolling wear sample for the mechanical part under this Action of Combined Loads and have become as a new research topic.
Bearing is frame for movement support bearing parts, bear high frequency Cyclic Load for a long time, ball is as the critical component of bearing, the high frequency Rolling wear of ball is again the major way of bearing failure, existing special bearing fatigue experimental device experimentation cost is higher, process of the test limiting factor is many, and still not for the super high cycle fatigue assay device of ball high frequency abrasion.Disclosed in patent of invention 201010599535.7 " a kind of contact fatigue tester for bearing roller and operational approach ", this testing machine and operational approach can carry out roller contact fatigue test, but adopt motor to drive speedup poor, high for super high cycle fatigue life test time cost, once can only carry out the fatigue test of a roller simultaneously.On the other hand, for the mechanical part born for a long time under high frequency Rolling wear Action of Combined Loads, the fatigue experimental device at this Action of Combined Loads lower component fatigue behaviour is not still tested yet.Patent of invention 201110328563.X proposes a kind of " micromotion friction ultrasonic vibration long-life fatigue test device ", this assay device can carry out the test of fine motion CONTACT WITH FRICTION test specimen extra long life, but the CONTACT WITH FRICTION type of assay device is for static friction, friction head maintains static, and contacting test specimen in reality is all motion mutually.For Problems existing in above-mentioned assay device, currently available technology is special procured and wants the ball super high cycle fatigue life-span under a kind of test compound load effect, and the high frequency Rolling wear fatigue experimental device of Rolling wear test specimen fatigue behaviour.
Ultrasonic fatigue testing technology adopts resonance principle, the high frequency electrical signal produced by ultrasonic generator is converted into the vibration displacement output of same frequency by transducer, then pass through length travel amplifier amplified by vibration displacement and be loaded on sample, thus the ultrasonic high frequency realizing structure loads, it is thus achieved that Fatigue Life in Very High Cycle.So, ball and vibration test specimen high frequency Rolling wear super high cycle fatigue test can be realized by ultrasonic load mode.
Summary of the invention
In order to avoid the deficiency that prior art exists, the present invention proposes a kind of ultrasonic high frequency ball fretting fatigue assay device, utilizes the mode of ultrasonic loading to realize vibrating the test of test specimen Fatigue Life in Very High Cycle under different ball sample super high cycle fatigue life tests and dither, Rolling wear Action of Combined Loads under abrasion load effect.
The technical solution adopted for the present invention to solve the technical problems is: include vertical test stand frame, ultrasonic charger, ball move device, ball clamping device, location leading screw, jack back, described vertical test stand frame includes base, gripper shoe, slide plate, crossbeam, described base is cuboid, trapezoidal groove is axially had in the middle of base, device is moved for installing ball, axially mounted hole is had to communicate with groove in the middle of base two ends, lateral symmetry 4 screws of distribution of base upper surface groove, there is support column base corner；Described gripper shoe is two block length square plates, gripper shoe lower end side is respectively arranged with two bearings with screw, two gripper shoes are respectively through being bolted on base, middle part, gripper shoe lower end has rectangular channel, gripper shoe width of rectangular is identical with base groove width, having dovetail groove in the middle of the side surface upper part that two gripper shoes are relative, there is the screw of symmetry upper end；Having centre bore in the middle of described slide plate, two ends projection end has dovetail configuration, and the dovetail configuration at slide plate two ends coordinates installation with the dovetail groove of gripper shoe, slides along dovetail groove vertical direction；Crossbeam two ends have screw, crossbeam to be bolted in two gripper shoe inside upper part；Described ultrasonic charger includes location dish, connecting rod, transducer, length travel amplifier, lower location dish, extensional vibration test specimen, ultrasonic charger is bolted in vertical test stand frame, described upper location dish is the thin plate disk that structure is identical with described lower location dish, through hole is had in the middle of the dish of location, it is evenly equipped with three screws according to through hole center is equidistant, there is screw thread at connecting rod two ends, and upper location dish is connected by connecting rod, nut with lower location dish；Transducer lower center has screw, center, length travel amplifier two ends has screw, transducer is positioned at the upper end of length travel amplifier, and be bolted with length travel amplifier, length travel amplifier coordinates with the intermediate throughholes of lower location dish and is fixed on the dish of lower location, extensional vibration test specimen is connected to the lower end of length travel amplifier, and upper location dish is connected by bolt, nut with slide plate；Described ball moves device and is made up of movable block, connecting plate, hold-down bolt, and two balls move the identical lower section being positioned at ultrasonic charger of apparatus structure, and two balls move device and are symmetrically mounted in the groove of base；Described movable block bottom is trapezium structure, there is screw centre, and it is coaxial with location leading screw, there are two symmetrical screws movable block upper end, movable block top is rectangular configuration, and there is lug both sides, and lug center has screw, hold-down bolt coordinates with lug screw, by rotatably compressing the bolt position to the fixing movable block of submounts；Through hole is had in the middle of on described connecting plate, and coaxial parallel with screw in the middle of movable block, it is connected by bolt that connecting plate lower base two ends have screw, connecting plate to be positioned at movable block upper end；Described ball clamping device includes pressure ball lid, ball sample, embedded block, spring, plug, chuck, two ball clamping device structures are identical, and described chuck is stepped cylindrical body, and there is external screw thread chuck one end, chuck other end center has three sections of inner bore of step, uniform three screws in outer face；Plug one end is nested in the 3rd section of stepped hole of chuck, spring housing is positioned at the second segment stepped hole of chuck on plug, embedded block one end is nested in the first paragraph stepped hole of chuck, embedded block one end has centre bore, the plug other end is nested in embedded block centre bore, and there is spherical groove at embedded block other end center；Pressure ball lid center has spheric through hole, and outer side surface circumference is evenly equipped with three lugs, and lug has centre bore, and pressure ball lid and chuck are bolted；Ball sample is between embedded block and pressure ball lid, and ball sample rotates in embedded block with pressure ball lid；Two chucks have the through hole that externally threaded one end is each passed through on two connecting plates to be fastenedly connected by nut；There is the screw thread that two sections of equal lengths are oppositely oriented leading screw middle part, described location, two ends are square structure, location leading screw is each passed through screw in the middle of movable block, location leading screw is arranged on the installing hole at base two ends, and location leading screw rotarily drives two balls and moves device and be axially opposite along base dovetail groove and move；Having square through hole in the middle of described jack back, two ends are cylindrical bar, and jack back is connected with leading screw one end, location, drives location leading screw rotary motion by jack back.
The centrage of the dovetail groove of gripper shoe and the middle axial notch of base, base two ends through hole is positioned at same vertical.
Crossbeam installation parallel with base.
Beneficial effect
The ultrasonic high frequency ball fretting fatigue assay device that the present invention proposes, utilizes resonance principle, it is ensured that ultrasonic charger 20kHz frequency of vibration, carries out high frequency loading and realizes super high cycle fatigue life test；Location leading screw drives two balls to move the axial move toward one another of device, and slide plate drives ultrasonic charger along gripper shoe dovetail groove lengthwise movement, can accurately determine the relative position of ball sample and extensional vibration test specimen；Extensional vibration test specimen bears extensional vibration high frequency cyclic loading and Rolling wear Action of Combined Loads, carries out Fatigue Life in Very High Cycle test under different vibration material for test Action of Combined Loads；Extensional vibration displacement on extensional vibration test specimen diverse location is different, by regulating longitudinal contact position of extensional vibration test specimen and ball sample, it is achieved the loading to the vibration friction displacement of ball sample different size, and ensures the circulating rolling of ball；Two ball clamping devices and two balls move device and connect, and can once realize the Ultrasonic fatigue testing of two ball samples；Ball is circulating rolling in ball clamping device, and contacts with extensional vibration test specimen, it is achieved Rolling wear load loads；Ball clamping device is shock-damping structure, available buffer ball sample and extensional vibration test specimen making contact；By detecting the resonant frequency of the whole resonator system of ultrasonic charger, it may be determined that whether ball sample fatigue rupture occurs；Ball sample can be replaced according to the different of subjects from extensional vibration test specimen.
Accompanying drawing explanation
Below in conjunction with drawings and embodiments, a kind of ultrasonic high frequency ball fretting fatigue assay device of the present invention is described in further detail.
Fig. 1 is the present invention ultrasonic high frequency ball fretting fatigue assay device structural representation.
Fig. 2 is the ultrasonic charger structural representation of the present invention.
The ball that Fig. 3 is the present invention moves apparatus structure schematic diagram.
Fig. 4 is the ball clamping device explosive view of the present invention.
Fig. 5 is the ball clamping device sectional view of the present invention.
Fig. 6 is the understructure schematic diagram of the present invention.
Fig. 7 is the supporting plate structure schematic diagram of the present invention.
Fig. 8 is the skateboard schematic diagram of the present invention.
Fig. 9 is the beam structure schematic diagram of the present invention.
Figure 10 is the upper location dish schematic diagram of the present invention.
Figure 11 is the connecting rod structural representation of the present invention.
Figure 12 is the transducer schematic diagram of the present invention.
Figure 13 is the length travel amplifier schematic diagram of the present invention.
Figure 14 is the lower location dish schematic diagram of the present invention.
Figure 15 is the extensional vibration test specimen structural representation of the present invention.
Figure 16 is the positioning filament bumper structure schematic diagram of the present invention.
Figure 17 is the extensional vibration test specimen resonance shifts schematic diagram of the present invention.
Figure 18 is the extensional vibration test specimen resonance stress schematic diagram of the present invention.
Figure 19 is the jack back structural representation of the present invention.
Figure 20 is the movable block structural representation of the present invention.
Figure 21 is the connecting board structure schematic diagram of the present invention.
Figure 22 is the pressure ball lid structural representation of the present invention.
Figure 23 is the embedded block structural representation of the present invention.
Figure 24 is the chuck structure schematic diagram of the present invention.
In figure:
1. on base 2. gripper shoe 3. slide plate 4. crossbeam 5., 9. times location dish 10. extensional vibration test specimens 11. of location dish 6. connecting rod 7. transducer 8. length travel amplifier position leading screw 12. jack back 13. movable block 14. connecting plate 15. hold-down bolt 16. pressure ball lid 17. ball sample 18. embedded block 19. spring 20. plug 21. chuck
Detailed description of the invention
The present embodiment is a kind of ultrasonic high frequency ball fretting fatigue assay device.This assay device application resonance principle, transducer, length travel amplifier and extensional vibration test specimen constitute longitudinal resonator system, ensure the 20kHz frequency of vibration of whole longitudinal resonator system by accurately calculating the physical dimension of each assembly.Ultrasonic charger lengthwise movement is driven by regulating vertical test stand frame upper slide lengthwise position, two balls that rotarily drive of location leading screw move device together with ball clamping device transverse direction move toward one another, thus accurately determining the ball relative position relative to extensional vibration test specimen.Extensional vibration test specimen is under the extensional vibration high frequency Cyclic Load of ultrasonic charger, simultaneously also subject to the Rolling wear load of ball, can carry out Fatigue Life in Very High Cycle test under vibration test specimen Action of Combined Loads.Extensional vibration displacement on extensional vibration test specimen diverse location is different, by regulating longitudinal contact position of extensional vibration test specimen and ball, it is achieved the vibration friction displacement of ball sample different size is loaded.Ultrasonic charger can external monitoring system, determine whether ball sample fatigue rupture occurs and then test out the fatigue life of ball sample by detecting the resonant frequency of whole resonator system.Ball sample can be replaced according to the different of subjects from extensional vibration test specimen.
Consult Fig. 1～Figure 24, the present embodiment ultrasonic high frequency ball fretting fatigue assay device, is moved device, ball clamping device, location leading screw and jack back formed by vertical test stand frame, ultrasonic charger, ball；Ultrasonic charger is fixed on the middle part of vertical test stand frame upper end slide plate 3, is regulated the position of vertical direction by the slip of slide plate 3；Location leading screw 11 is arranged in the middle of the base 1 of vertical test stand frame, and moves device bottom through ball；Ball moves device and is arranged on vertical test stand frame base 1 middle part；Ball clamping device is connected to ball and moves device top, jack back 12 is connected with location leading screw 11, regulate ball by rotation jack back 12 and move the lateral displacement of device so that the ball sample 17 being positioned on ball clamping device contacts with ultrasonic charger extensional vibration test specimen 10.
In the present embodiment, vertical test stand frame includes base 1, gripper shoe 2, slide plate 3, crossbeam 4, base 1 is cuboid, centre axially has trapezoidal groove, move device for installing ball, in the middle of base 1 two ends, have axially mounted hole to communicate with groove, be used for location leading screw 11 is installed, the lateral symmetry distribution of base upper surface groove has 4 screws, and there is support corner, base 1 bottom.Gripper shoe 2 is the rectangular slab that two block structures are identical, gripper shoe 2 lower end side is respectively arranged with two bearings with screw, two gripper shoes are respectively through being bolted on base, the processing of middle part, gripper shoe 2 lower end has rectangular channel, the width of gripper shoe 2 rectangular channel is identical with the width of base 1 groove, in the middle of the side surface upper part that two gripper shoes are relative, processing has dovetail groove, upper end to have the screw of symmetry respectively.Having centre bore in the middle of slide plate 3, two ends projection end has dovetail configuration, and the dovetail configuration at slide plate 3 two ends coordinates installation with the dovetail groove of gripper shoe 2, and slides along dovetail groove vertical direction.Crossbeam 4 two ends have screw, and crossbeam 4 is bolted in two gripper shoe inside upper part.
Ultrasonic charger includes location dish 5, connecting rod 6, transducer 7, length travel amplifier 8, lower location dish 9, extensional vibration test specimen 10, upper location dish 5 is identical with lower location dish 9 structure, location dish is circular sheet, middle part has through hole, is evenly equipped with three screws according to through hole center is equidistant.There is screw thread at connecting rod 6 two ends, and upper location dish 5 is connected by connecting rod 6 with lower location dish 9, and upper location dish 5 is connected on slide block 3 by screw bolt and nut.Transducer 7 lower center has screw, has screw in the middle of length travel amplifier 8 two ends, and transducer 7 is bolted the upper end at length travel amplifier 8, and length travel amplifier 8 is arranged on lower location dish 9 by the intermediate throughholes of lower location dish；Extensional vibration test specimen 10 is arranged on the lower end of length travel amplifier 8, and extensional vibration test specimen 10 meets the resonant frequency of ultrasonic charger；Extensional vibration test specimen 10 is rotary structure, upper surface is threaded on the screw of length travel amplifier 8 lower end, upper and lower two ends are unsymmetric structure, upper end column diameter is more than lower end column diameter, and the asymmetry in structure causes that extensional vibration test specimen resonance shifts offsets to top with stress distribution symmetric position.
Ball moves device and is made up of movable block 13, connecting plate 14, hold-down bolt 15, and two balls move in the identical groove being symmetrically mounted on vertical test stand frame base 1 of apparatus structure；Movable block 13 bottom is divided into trapezium structure, middle part processing has screw, and it is coaxial with location leading screw 11, there are two symmetrical screws movable block 13 upper end, there is lug both sides, movable block 13 top, the processing of lug center has screw, and hold-down bolt 15 coordinates with lug screw, by rotatably compressing the position of bolt 15 to base 1 fixing movable block 13 above.Through hole is had in the middle of connecting plate 14 top, and coaxial parallel with the middle screw of movable block 13, it is connected by bolt that connecting plate 14 lower base two ends have screw, connecting plate 14 to be arranged on movable block 13 upper end.
Ball clamping device is made up of pressure ball lid 16, ball sample 17, embedded block 18, spring 19, plug 20, chuck 21, two ball clamping device structures are identical, and the chuck of two ball clamping devices is each passed through the through hole that two balls move on the connecting plate of device and is fastenedly connected by nut.Chuck 21 end surface has external screw thread, chuck 21 other end to be three sections of stepped hole structures, and outer face is evenly equipped with three screws；Plug 20 one end is nested in the 3rd section of stepped hole of chuck 21, and spring 19 is enclosed within the second segment stepped hole being arranged on chuck 21 on plug 20, and and has minim gap between plug 20 and chuck 21 second segment stepped hole；Embedded block 18 one end is nested in the first paragraph stepped hole of chuck 21, embedded block 18 end face has centre bore, plug 20 other end is nested in embedded block 18 centre bore, and have gap with plug 20 end face bottom end-face central hole, and it is equal to take on clearance distance with the first paragraph stepped hole of embedded block 18 end face to chuck 21, the processing of center, embedded block 18 other end has spherical groove.The processing of pressure ball lid 16 center has spheric through hole, pressure ball lid 16 outer side surface uniform three lugs of circumference, and lug has central through hole, and pressure ball lid 16 and chuck 21 are bolted；Ball sample 17 is nested in the sphere slotted eye between embedded block 18 and pressure ball lid 16, ensure that ball sample 17 part exceeds pressure ball lid 16 end face, ball sample 17 contacts with extensional vibration test specimen 10 linear friction, spring 19 plays certain cushioning effect for making contact, and ball sample 17 rotates in embedded block 18 with pressure ball lid 16 simultaneously.
Location leading screw 11 is cylindrical, on the leading screw 11 of location, middle part has two sections with the oppositely oriented screw thread of length, leading screw 11 two ends, location are square block structure, location leading screw 11 is each passed through two balls and moves the movable block 13 of device, and coordinate with screw in the middle of movable block 13 bottom and to move device together with ball and together install, location leading screw 11 is arranged on the installing hole of base 1 two side ends, and location leading screw 11 rotarily drives two balls and moves device and be axially opposite along base 1 dovetail groove and move.Having square through hole in the middle of jack back 12, two ends are cylindrical bar, and jack back 12 is connected with leading screw 11 one end, location, are rotated by jack back 12 and drive location leading screw 11 rotary motion.
Embodiment one
nullIn the present embodiment，When ultrasonic high frequency ball fretting fatigue assay device carries out the abrasion super high cycle fatigue test of ball sample high frequency，First ball clamping device and ultrasonic charger are separately mounted on vertical test stand frame，Then according to test demand, ball sample 17 is arranged on ball clamping device，And ball clamping device is connected to ball moves on device，Then rotating jack back 12 drives location leading screw 11 to rotate the axle lateral attitude regulating ball sample，Regulated the lengthwise position of ultrasonic charger by slide plate 3 simultaneously，Make ball sample 17 and extensional vibration test specimen 10 linear contact and ensure ball sample 17 rolling capable of circulation，Rotatably compress bolt 15 after determining position ball moves device to carry out locking positioning，Finally start ultrasonic charger and carry out the test of ball sample 17 high frequency fretting fatigue.
Embodiment two
nullIn the present embodiment，Ultrasonic high frequency ball fretting fatigue assay device carries out extensional vibration test specimen dither、Under Rolling wear Action of Combined Loads during Fatigue Life in Very High Cycle test，Suitable vibration test specimen is made according to the test material to carry out，First ball clamping device and ultrasonic charger are separately mounted on vertical test stand frame，Then according to test demand, ball sample 17 is arranged on ball clamping device，And ball clamping device is connected to ball moves on device，Then rotating jack back 12 drives location leading screw 11 to rotate the axial location regulating ball sample 17，Regulated the lengthwise position of ultrasonic charger by slide plate 3 simultaneously，Make ball sample 17 and extensional vibration test specimen 10 linear contact and ensure ball sample 17 rolling capable of circulation，Start ultrasonic charger and carry out extensional vibration test specimen 10 high frequency Rolling wear fatigue test.
Claims (3)
1. a ultrasonic high frequency ball fretting fatigue assay device, it is characterized in that: include vertical test stand frame, ultrasonic charger, ball move device, ball clamping device, location leading screw, jack back, described vertical test stand frame includes base, gripper shoe, slide plate, crossbeam, described base is cuboid, trapezoidal groove is axially had in the middle of base, device is moved for installing ball, axially mounted hole is had to communicate with groove in the middle of base two ends, lateral symmetry 4 screws of distribution of base upper surface groove, there is support column base corner；Described gripper shoe is two block length square plates, gripper shoe lower end side is respectively arranged with two bearings with screw, two gripper shoes are respectively through being bolted on base, middle part, gripper shoe lower end has rectangular channel, gripper shoe width of rectangular is identical with base groove width, having dovetail groove in the middle of the side surface upper part that two gripper shoes are relative, there is the screw of symmetry upper end；Having centre bore in the middle of described slide plate, two ends projection end has dovetail configuration, and the dovetail configuration at slide plate two ends coordinates installation with the dovetail groove of gripper shoe, slides along dovetail groove vertical direction；Crossbeam two ends have screw, crossbeam to be bolted in two gripper shoe inside upper part；Described ultrasonic charger includes location dish, connecting rod, transducer, length travel amplifier, lower location dish, extensional vibration test specimen, ultrasonic charger is bolted in vertical test stand frame, described upper location dish is the thin plate disk that structure is identical with described lower location dish, through hole is had in the middle of the dish of location, it is evenly equipped with three screws according to through hole center is equidistant, there is screw thread at connecting rod two ends, and upper location dish is connected by connecting rod, nut with lower location dish；Transducer lower center has screw, center, length travel amplifier two ends has screw, transducer is positioned at the upper end of length travel amplifier, and be bolted with length travel amplifier, length travel amplifier coordinates with the intermediate throughholes of lower location dish and is fixed on the dish of lower location, extensional vibration test specimen is connected to the lower end of length travel amplifier, and upper location dish is connected by bolt, nut with slide plate；Described ball moves device and is made up of movable block, connecting plate, hold-down bolt, and two balls move the identical lower section being positioned at ultrasonic charger of apparatus structure, and two balls move device and are symmetrically mounted in the groove of base；Described movable block bottom is trapezium structure, there is screw centre, and it is coaxial with location leading screw, there are two symmetrical screws movable block upper end, movable block top is rectangular configuration, and there is lug both sides, and lug center has screw, hold-down bolt coordinates with lug screw, by rotatably compressing the bolt position to the fixing movable block of submounts；Through hole is had in the middle of on described connecting plate, and coaxial parallel with screw in the middle of movable block, it is connected by bolt that connecting plate lower base two ends have screw, connecting plate to be positioned at movable block upper end；Described ball clamping device includes pressure ball lid, ball sample, embedded block, spring, plug, chuck, two ball clamping device structures are identical, and described chuck is stepped cylindrical body, and there is external screw thread chuck one end, chuck other end center has three sections of inner bore of step, uniform three screws in outer face；Plug one end is nested in the 3rd section of stepped hole of chuck, spring housing is positioned at the second segment stepped hole of chuck on plug, embedded block one end is nested in the first paragraph stepped hole of chuck, embedded block one end has centre bore, the plug other end is nested in embedded block centre bore, and there is spherical groove at embedded block other end center；Pressure ball lid center has spheric through hole, and outer side surface circumference is evenly equipped with three lugs, and lug has centre bore, and pressure ball lid and chuck are bolted；Ball sample is between embedded block and pressure ball lid, and ball sample rotates in embedded block with pressure ball lid；Two chucks have the through hole that externally threaded one end is each passed through on two connecting plates to be fastenedly connected by nut；There is the screw thread that two sections of equal lengths are oppositely oriented leading screw middle part, described location, two ends are square structure, location leading screw is each passed through screw in the middle of movable block, location leading screw is arranged on the installing hole at base two ends, and location leading screw rotarily drives two balls and moves device and be axially opposite along base dovetail groove and move；Having square through hole in the middle of described jack back, two ends are cylindrical bar, and jack back is connected with leading screw one end, location, drives location leading screw rotary motion by jack back.
2. ultrasonic high frequency ball fretting fatigue assay device according to claim 1, it is characterised in that: the centrage of the dovetail groove of gripper shoe and the middle axial notch of base, base two ends through hole is positioned at same vertical.
3. ultrasonic high frequency ball fretting fatigue assay device according to claim 1, it is characterised in that: crossbeam installation parallel with base.
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| CN110361451A (en) * | 2018-01-03 | 2019-10-22 | 西南石油大学 | A kind of adaptive frequency formula Ultrasonic Fatigue Test-Bed |
| CN111175159A (en) * | 2019-12-30 | 2020-05-19 | 中钢集团邢台机械轧辊有限公司 | Horizontal bat type contact fatigue testing machine |
| CN112067295A (en) * | 2020-09-07 | 2020-12-11 | 沈阳建筑大学 | All-ceramic ball bearing outer ring raceway rolling contact fatigue test device and test method |
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