CN201653822U - Ultrasonic bending fatigue testing device capable of automatically adjusting sample bearing points - Google Patents
Ultrasonic bending fatigue testing device capable of automatically adjusting sample bearing points Download PDFInfo
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- CN201653822U CN201653822U CN2010201788832U CN201020178883U CN201653822U CN 201653822 U CN201653822 U CN 201653822U CN 2010201788832 U CN2010201788832 U CN 2010201788832U CN 201020178883 U CN201020178883 U CN 201020178883U CN 201653822 U CN201653822 U CN 201653822U
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Abstract
Disclosed is an ultrasonic bending fatigue testing device capable of automatically adjusting sample bearing points. A transducer is positioned inside a power transmission device and connected with a connector. A cushion board of the power transmission device is fixedly connected with an upper connecting board and a lower connecting board through power transmission rods. One end of the connector penetrates through the lower connecting board at the lower end of the power transmission device to be connected with a displacement amplifier, while the other end penetrates through the upper connecting board to be connected with the transducer. A bearing device is positioned below the displacement amplifier. A static load boosting device penetrates through a central hole of the cushion board to be connected with the cushion board. The transducer, the connector, the displacement and a pressure head form a longitudinal resonance system, and longitudinal vibration load is transmitted to a bending fatigue sample through the pressure head so as to lead a bending fatigue sample to be bent and vibrate. A positioning lead screw can realize automatic adjustment of bearing point positions of the bending fatigue sample so as to realize ultrasonic bending fatigue testing, the device can realize ultrasonic bending fatigue testing of samples with different loads and geometrical sizes, and is adaptable to bending fatigue tests using an axial load ultrasonic fatigue tester.
Description
Technical field
The present invention relates to structured material fatigue, durability test field, specifically is a kind of ultrasonic bending fatigue experimental device of automatic adjusting sample supporting-point.
Background technology
Fatigue failure is the main failure forms of structural member under alternate load, all is fatigure failure as members such as bent axle, gear, connecting rod, spring, bolt and pressure vessel, vehicle, aircraft, ocean platform, the isostructural main failure forms of welded steel bridge.The ratio that the engineering component failure accidents that fatigure failure causes accounts for total accident reaches 80%.Because fatigue break takes place suddenly, and causes catastrophic accident, therefore, the problem of fatigue damage of material is the problem of research of Chinese scholars and engineering circle and care always.
At industrial circles such as Aero-Space, automobile, railway, nuclear industry, machineries, some structure parts will bear high frequency, cyclic loading effect by a narrow margin in the course of the work, bear the cyclic loading number of times up to 10
9-10
11In week, though this high frequency cyclic loading stress amplitude is little, its frequency is very high, can reach thousands of hertz, when especially this high frequency, low amplitude load and other load superposeed, the complex injury that causes is the damage of accelerating structure parts widely, and serious threat is arrived the work safety of structure member with reliable.So abroad in research runs up fatigue lifetime of structural member, pay attention to by a narrow margin especially, superelevation week Research of Fatigue Life.In recent years, the relevant works material 10
7The research of the superelevation week fatigue behaviour that cycle is above has become a new problem of fatigue study, causes the great attention of engineering circle.
Ultrasonic fatigue (Ultrasonic Fatigue) experimental technique adopts resonance principle, the high frequency electrical signal that ultrasonic generator produces is exported by the vibration displacement that transducer is converted into same frequency, this vibration displacement amplifies through displacement amplifier, the high frequency pulsating stress is loaded on sample, thereby the ultrasonic high frequency CYCLIC LOADING of implementation structure material, and then the experimental study of all fatigue behaviours of the superelevation of implementation structure material.The ultrasonic fatigue experimental technique has become effectively, has obtained reliably the laboratory facilities of construction material superelevation week fatigue behaviour.
Existing ultrasonic fatigue experimental provision is mainly formed (as Fig. 1) by ultrasonic generator, transducer, high power displacement amplifier, drawingand pressing fatigue sample, excitation power is provided and hands over electric signal frequently by ultrasonic generator, ultrasonic transducer will be handed over frequently, and electrical signal conversion is the vibration signal of same frequency, the high power displacement amplifier amplifies the vibration displacement of transducer output, and passing to the drawingand pressing fatigue sample, the axial circulation stress that forms sample loads.Because existing ultrasonic fatigue experimental provision does not have longitudinal wave to be converted to the experimental provision of lateral wave, simultaneously, owing to axially load in the ultrasonic fatigue experimental provision existing, the dynamic loading that the drawingand pressing fatigue sample is born is pre-consistent with the static load direction, do not need to consider the influence of static load to dynamic loading, so structurally do not have the static load augmentor, so axial loading ultrasonic fatigue experimental provision of the prior art can only be realized the axial loading to fatigue testing specimen.
Summary of the invention
For overcoming can only realizing of existing in the prior art the axial deficiency that loads of fatigue testing specimen be the present invention proposes a kind of ultrasonic bending fatigue experimental device of automatic adjusting sample supporting-point.
The present invention includes low power displacement amplifier, connector, fulcrum arrangement, force transmitters and transducer; The lower end of transducer is connected by screw rod with connector.And
Transducer is positioned at force transmitters; Force transmitters is positioned at the middle part of ultrasonic bending fatigue experimental device; Force transmitters comprises lower connecting plate, upper junction plate, transmission rod and backing plate, and backing plate is positioned at the top of force transmitters, and upper junction plate and lower connecting plate are positioned at the lower end of force transmitters.Be connected by transmission rod between backing plate and upper junction plate and the lower connecting plate.The lower connecting plate that connector one end passes the force transmitters lower end is connected with the low power displacement amplifier; The other end passes upper junction plate, is connected with transducer.
Fulcrum arrangement is positioned at low power displacement amplifier below; Center pit and backing plate that the static load augmentor passes backing plate are connected.
Fulcrum arrangement is a symmetrical structure, comprises briquetting, adjusting slider, vertical set screw, slide block, supporting lid, abutment sleeve, location leading screw, handle, base, lateral adjustments screw, support strip briquetting, support strip and slide block fixed head; The center that is installed in the base table top of two slide block symmetries, two adjusting sliders lay respectively in the guide chute of shoe surface; Two supporting lids lay respectively at the two ends of base table top; The location leading screw passes the location leading screw mounting groove that traverses the base table top, and locatees by abutment sleeve; Support strip is installed in the support strip mounting groove on the slide block, and briquetting, support strip briquetting be the two ends of fixed bearing bar respectively.
Described spacing block is sleeved on the transmission rod between lower connecting plate and the upper junction plate.Transmission rod one end is connected with backing plate, and the other end is fixed with nut after successively passing upper junction plate, spacing block and lower connecting plate.
There is the through hole that cooperates with the experiment table locating shaft at the base plate center of described base; There is the guide chute of slide block at the table top center of base, and the centre bit of guide chute is equipped with the locating piece that protrudes the chute inside surface, in the both sides of locating piece, is the guide chute and the location leading screw mounting groove of the slide block that is interconnected from inside to outside.
The contiguous block of described slide block is positioned at the guide chute of base, and location leading screw connecting hole is arranged on this contiguous block; There is the guide chute of the installation adjusting slider parallel with the location leading screw connecting hole on the contiguous block on the mounting blocks surface of slide block, and the center of the center of this guide chute and location leading screw connecting hole is on same vertical plane; The support strip mounting groove vertical with guide chute arranged on slide block mounting blocks surface on one side.
Leading screw middle part, described location outside surface has two sections external threads that rotation direction is opposite; Two sections external threads together are placed in the guide chute of base respectively with after a slide block is connected; There is the mounting hole of abutment sleeve at leading screw two ends, location; The two ends of location leading screw are set with abutment sleeve, and make an end face of abutment sleeve be close to the sidewall of base; Stop screw passes the locating slot of abutment sleeve side, in the screw on the location leading screw of packing into; Abutment sleeve is by endoporus and location leading screw clearance fit.
There is the via hole of semicircular location leading screw at the center on described supporting lid base, both sides; There is connecting hole at cap surface two ends at the supporting lid; When the location leading screw is connected in the guide chute that also together is placed in base with slide block after, to support lid is fixed on the base, the half slot of lower surface and the semicircle location leading screw mounting groove of base upper surface are covered in supporting, have constituted the leading screw supporting base that supporting location leading screw freely rotates.
The both sides of described adjusting slider have open slot respectively, and this open slot is symmetrical in the center of adjusting slider, and the opening direction unanimity; There is the mounting hole of vertical set screw at the center of adjusting slider.
The middle side edge of described briquetting has the mounting hole of lateral adjustments screw; Below the lateral adjustments screw mounting hole, the bottom of briquetting side, have and compress the groove that support strip cooperates; The both sides of briquetting upper surface set screw mounting hole, the connecting hole of the orthogonal slide block of center line of own centre line and lateral adjustments screw mounting hole.Connecting hole on the support strip briquetting is positioned at the both sides that compress the support strip pressing groove.Be slidingly matched between the guide chute on slide block and the base table top; The diameter of location leading screw mounting groove is with location leading screw external diameter.
The present invention uses resonance principle, guarantees that the bending fatigue sample has identical resonance frequency with the ultrasonic fatigue experimental system, realizes the compound loading of different static loads and dynamic loading.The bending fatigue experimental device supporting part adopts lead screw transmission, guide chute guiding, thereby the accurate location and the loading of realization bending fatigue sample.Because system keeps resonance in the ultrasonic bending fatigue experimentation, therefore must accurately calculate the resonance size of each assembly under the 20kHz vibration frequency, and the bending fatigue sample is accurately located.In bending fatigue experimental device, vertical automatic centering device should be set, and the horizontal positioning device that guarantees located lateral.Vertically, horizontal positioning device, all by feed screw apparatus control, thereby realize the fatigue experiment of any physical dimension bending fatigue sample.
Transducer of the present invention, connector, low power displacement amplifier and pressure head constitute vertical resonator system, and by pressure head with the extensional vibration loading transfer to the bending fatigue sample, make the bending fatigue sample produce flexural vibrations.The physical dimension of bending fatigue sample, the position of supporting-point make its crooked syntony condition satisfied and extensional vibration load same frequency through strict calculating, thereby make the bending fatigue sample produce flexural resonance.In the ultrasonic bending fatigue experimental device, designed connector, transmission rod and upper and lower web joint, spacing block constitute force transmitters, the upper and lower web joint of force transmitters is connected with the null displacement face of connector, static load puts on bend specimen by the null displacement face of connector, to avoid the influence of static load, guarantee the resonant condition of ultrasonic bending fatigue system to the system vibration ripple.The position that the location leading screw can realize regulating automatically bending fatigue sample supporting-point in the ultrasonic bending fatigue experiment fulcrum arrangement, and guarantee the automatic centering of bending fatigue sample, thus realize the ultrasonic bending fatigue experiment.
Connector of the present invention designs according to the vibration wave wave theory.Zero vibration displacement face is arranged on the connector, the static load augmentor is connected with the zero vibration displacement face of connector, add static load by this zero vibration displacement face, static load is passed to the bending fatigue sample, connector also passes to dynamic loading the bending fatigue sample simultaneously, and the transmission between dynamic loading and the static load is independent of each other.Bending fatigue sample design consideration lateral wave wave theory, design load(ing) point and supporting-point.Realize by regulating fulcrum arrangement the accurate position of load(ing) point and supporting-point.The present invention is fixed on support strip on the slide block, and the slide block internal thread forms helical motion with the location leading screw, and the positioning of rotating leading screw can promote slide block, and slide block makes it slide along the guide chute in the base, and then determined length travel by the screw rod power transmission.Realize the automatic centering of bend specimen by the reverse-flighted screw carriage.Simultaneously, the located lateral that the present invention adopts is to add screw rod lateral thruster location by monolateral pair of guide pillar, and the internal thread of briquetting and set screw form worm drive, and the rotation set screw can promote the bending fatigue sample, guarantees the located lateral of bending fatigue sample.Support strip is installed on the slide block, can unload replacing after the wearing and tearing.
The application of ultrasonic bending fatigue experimental device can realize the ultrasonic bending fatigue experiment of different loaded load, different geometrical size bending fatigue sample effectively.It is suitable for utilizing axial loading ultrasonic fatigue experimental machine to carry out crooked fatigue experiment.
Description of drawings
Accompanying drawing 1 is a ultrasonic fatigue experimental provision structural representation of the prior art;
Accompanying drawing 2 is structural representations of ultrasonic bending fatigue experimental device;
Accompanying drawing 3 is axis of no-feathering mappings of ultrasonic bending fatigue experimental device;
Accompanying drawing 4 is distribution situations of vibration displacement under two kinds of experimental provisions, and wherein a is the axial vibration displacement curve that axially loads the ultrasonic fatigue experimental provision, and b is the axial vibration displacement and the bending fatigue sample flexural vibrations displacement curve of ultrasonic bending fatigue experimental device;
Accompanying drawing 5 is structural representations of connector;
Accompanying drawing 6 is structural representations of spacing block;
Accompanying drawing 7 is structural representations of web joint;
Accompanying drawing 8 is structural representations of backing plate;
Accompanying drawing 9 is structural representations of low power displacement amplifier;
Accompanying drawing 10 is structural representations of pressure head;
Accompanying drawing 11 is axonometric drawings of fulcrum arrangement;
Accompanying drawing 12 is vertical views of fulcrum arrangement;
Accompanying drawing 13 is front views of fulcrum arrangement;
Accompanying drawing 14 is structural representations of base;
Accompanying drawing 15 is structural representations of supporting lid;
Accompanying drawing 16 is structural representations of slide block;
Accompanying drawing 17 is structural representations of adjusting slider;
Accompanying drawing 18 is structural representations of briquetting;
Accompanying drawing 19 is structural representations of support strip briquetting;
Accompanying drawing 20 is structural representations of location leading screw;
Accompanying drawing 21 is structural representations of abutment sleeve;
Accompanying drawing 22 is structural representations of handle;
Accompanying drawing 23 is structural representations of slide block fixed head.Wherein:
1. drawingand pressing fatigue sample 2. high power displacement amplifiers 3. guide chutes 4. fulcrum arrangements 5. bending fatigue samples
6. low power displacement amplifier 7. connectors 8. lower connecting plates 9. upper junction plates 10. transducers
11. transmission rod 12. backing plates 13. static load augmentors 14. spacing blocks 15. pressure heads
16. briquetting 17. adjusting sliders 18. vertical set screw 19. slide blocks 20. supporting lids
21. abutment sleeve 22. location leading screw 23. handles 24. bases 25. lateral adjustments screws
26. support strip briquetting 27. support strip 28. slide block fixed heads 29. support strip mounting grooves 30. location leading screw mounting grooves
Embodiment
Present embodiment is a kind of ultrasonic bending fatigue experimental device of automatic adjusting sample supporting-point, is used for the three-point bending fatigue experiment under the metal material 20kHz frequency, can finish the crooked fatigue experiment of stress ratio R＞0.According to the design of connector and low power displacement amplifier in this ultrasonic bending fatigue test unit, the stress amplitude of bending fatigue sample loads scope between 250-850MPa.The ultrasonic bending fatigue sample must satisfy the crooked syntony condition of 20kHz, and the minimum length of bending fatigue sample should be greater than 30mm.
Ultrasonic bending fatigue experimental device comprises fulcrum arrangement 4, bending fatigue sample 5, low power displacement amplifier 6, connector 7, transducer 10, force transmitters, static load augmentor 13, spacing block 14 and pressure head 15.Force transmitters is the framed structure of being made up of rod member and plate, comprises that lower connecting plate 8, upper junction plate 9, transmission rod 11, backing plate 12 constitute, and are positioned at the middle part of present embodiment; Transducer 10 is positioned at force transmitters.The flat board on force transmitters top is the backing plate 12 of erection dead load augmentor; The lower end of transducer 10 and connector 7 are connected by screw rod, and connector 7 passes the lower connecting plate 8 and the upper junction plate 9 of force transmitters lower end, and is connected with low power displacement amplifier 6.Fulcrum arrangement 4 is positioned at low power displacement amplifier 6 belows, is used to lay bending fatigue sample 5.The static load augmentor is the mechanical type pulling pressing device, and force transmitters is connected on the static load augmentor, by force transmitters static load is loaded into the bending fatigue sample.
As shown in Figure 5.Connector 7 is the aluminium alloy solid of revolution, and excircle is stepped, and its middle part external diameter maximum has formed the flange of connector 7; In the both sides of flange, be respectively the cooperation section of the lower connecting plate 8 and the upper junction plate 9 of various outer diameter.End face center, connector 7 two ends has threaded hole respectively, the less end of connector diameter is spirally connected by screw rod and low power displacement amplifier 6, a bigger end is spirally connected by screw rod and transducer 10, transducer 10 is connected with external ultrasonic generator by telecommunication cable, and the physical dimension of connector 7 satisfies the condition of resonance that 20kHz vibrates vertically.
Force transmitters comprises lower connecting plate 8, upper junction plate 9, transmission rod 11 and backing plate 12.Wherein, backing plate 12 is positioned at the top of force transmitters, and upper junction plate 9 and lower connecting plate 8 are positioned at the lower end of force transmitters; Be connected by three transmission rods 11 between backing plate 12 and upper junction plate 9 and the lower connecting plate 8.Static load augmentor 13 passes the center pit of backing plate 12, and is connected by nut and backing plate 12, thereby backing plate 12 is connected on the static load augmentor 13.
Backing plate 12 is a circular plate, and there is through hole at the center.Lower connecting plate 8 and upper junction plate 9 are circular plate, and the installation through hole of connector 7 is arranged at lower connecting plate 8 and upper junction plate 9 centers, and this connector 7 is installed the diameter of the internal diameter of through holes less than connector 7 middle part excircle upper flanges.The big end of connector 7 flanges one side passes the center pit of upper junction plate 9, and the small end of connector 7 flanges one side passes the center pit of lower connecting plate 8, and the flange that makes connector 7 middle parts is between lower connecting plate 8 and upper junction plate 9.All there is external thread at the two ends of transmission rod 11; One end of transmission rod 11 is connected by the connecting hole and the backing plate 12 at backing plate 12 edges, and the other end passes three connecting holes that are positioned at lower connecting plate 8 and upper junction plate 9 edges respectively, and fixes with nut.
As shown in figure 10.Pressure head 15 is the rod member of the approximate taper of xsect.There is the connection screw at middle part on pressure head 15 planes, connects screw by this, links to each other with the screw on the small end end face of screw rod and low power displacement amplifier 6, and realization pressure head 15 is connected with low power displacement amplifier 6.The cone tip part that forms pressure head 15 tapers is circular arc, and the cone tip part of this circular arc contacts with bending fatigue sample 5 when fatigue experiment.
As shown in Figure 9.Low power displacement amplifier 6 is the solid of revolution that process with titanium alloy material, and according to the experiment demand, the enlargement factor of low power displacement amplifier is 6.3, and the physical dimension of low power displacement amplifier satisfies the condition of resonance that 20kHz vibrates vertically.The excircle of low power displacement amplifier 6 is stepped; Be processed with screw at low power displacement amplifier both ends of the surface center, the end that diameter is little is connected with pressure head 15 by screw rod, and the end that diameter is big is connected with connector 7 by screw rod.
As shown in Figure 6.Three spacing blocks 14 are the hollow solid of revolution, are sleeved on each transmission rod 11 between lower connecting plate 8 and the upper junction plate 9.The internal diameter of spacing block 14 is slightly larger than the external diameter of transmission rod 11, after spacing block 14 is sleeved on the transmission rod 11, and clearance fit between the two.The height of spacing block 14 housings is with the thickness of connector 7 flanges.When transmission rod 11 is connected with lower connecting plate 8 with upper junction plate 9, upper junction plate 9 and lower connecting plate 8 are isolated separately by spacing block.The height of spacing block 14 with respect to the tolerance of connector 7 thickness of flange is+0.1mm, to guarantee that connector 7 can rotate between upper junction plate 9 and lower connecting plate 8.
Shown in Figure 11-13.Fulcrum arrangement 4 is a symmetrical structure, comprises briquetting 16, adjusting slider 17, vertically set screw 18, slide block 19, supporting covers 20, abutment sleeve 21, located leading screw 22, handle 23, base 24, lateral adjustments screw 25, support strip briquetting 26, support strip 27 and slide block fixed head 28.Fulcrum arrangement 4 is installed on the experiment table top of static load augmentor, and is positioned at the center of experiment table top.Location leading screw 22 passes the screwed hole of centre of two slide blocks 19 respectively, and is bearing on the location leading screw mounting groove 30 that traverses base 24 table tops.Two slide blocks 19 are installed in the guide chute 3 at base 24 table top centers symmetrically, and two adjusting sliders 17 lay respectively in the guide chute on slide block 19 surfaces.Two supportings covers 20 and are installed on the two ends of base 24 table tops respectively, and make location leading screw 22 pass semicircle that supporting cover 20 lower ends and the semicircle at base table top two ends is located in the supporting base of leading screw mounting groove 30 formations.After two slide block 19 initial positions are determined, determine the position of leading screw 22 on base 24 table tops, location by abutment sleeve 21.Two support strip 27 are placed in respectively in two semicircle support bar mounting grooves 29 on the slide block table top, the two ends of support strip are installed briquetting 16 and support strip briquetting 26 respectively, and briquetting 16 and support strip briquetting 26 are fixed on support strip in the semicircle support bar mounting groove 29 above the slide block.The screw that vertical set screw 18 is passed adjusting slider 17 middle parts respectively is installed on two adjusting sliders, and the threaded hole that lateral adjustments screw 25 passes briquetting 16 middle parts respectively is installed on two briquettings.After two slide positions are determined, by two slide block fixed heads 28 slide block is fixed on the base 24 respectively.
As shown in figure 14.Base 24 is welded by the stand of dull and stereotyped and an impossible font.There is through hole at middle part at the base flat board, and the diameter of this through hole is a clearance fit with the locating shaft diameter on the static load augmentor experiment table top between the two; The stand of impossible font is positioned at the top of dull and stereotyped middle part, through hole.There is the guide chute 3 along this table top length direction at the table top center of impossible font stand, is used to install slide block 19, and slide block 19 can be slided in guide chute 3.The centre bit of guide chute 3 is equipped with the locating piece that protrudes guide chute 3 inside surfaces, is used for determining the initial position of slide block.In the both sides of locating piece is the guide chute 3 that is used to install slide block 19, and chute is interconnected from inside to outside.The width of the guide chute 3 of base 24 is a clearance fit with the width of slide block 19 lower surface contiguous blocks between the two, when the contiguous block of slide block 19 is placed in the guide chute 3, is slidingly matched between the two; Location leading screw mounting groove 30 is a circular arc, and its diameter is with location leading screw 22 external diameters, and both are clearance fit.Be useful on the base plate of base 24 base and static load augmentor experiment table are fixedly coupled the hole.
As shown in figure 16.Slide block 19 has two, is made up of mounting blocks and orthogonal with it contiguous block, and its profile is " T " font.The contiguous block of slide block 19 is positioned at the guide chute 3 of base 24; The connecting hole that the location leading screw 22 that connects this contiguous block is arranged on the contiguous block of slide block 19.The mounting blocks surface of slide block 19 has parallel being used to of location leading screw 22 connecting holes on the contiguous block with slide block that the guide chute 3 of adjusting slider 17 is installed, and the center of the center of this guide chute 3 and location leading screw 22 connecting holes is on same vertical plane., also have the vertical circular arc support strip mounting groove 29 of guide chute 3 on slide block 19 mounting blocks surfaces on one side, be used for mounting support bar 27; The mounting groove 29 of support strip 27 runs through the Width of slide block 19 mounting blocks.
As shown in figure 20.Location leading screw 22 middle part outside surfaces have two sections incoherent external threads, and two sections external thread rotaries are on the contrary.Two sections screw threads of location leading screw 22 together are placed in the guide chute 3 of base 24 respectively with after two slide blocks 19 are connected.When positioning of rotating leading screw 22, two slide blocks 19 move along guide chute 3 respectively in the opposite direction.The polished rod at leading screw two ends, location partly is processed with screw, is used to install two abutment sleeves.One end of location leading screw is connected with handle 23.During assembling, two slide blocks are screwed in the leading screw 22 of location, the linkage section of two slide blocks is placed in respectively in the guide chute 3 in the base 24, location leading screw 22 is placed in two semicircle location in the leading screw mounting grooves 30 on the base 24, makes slide block move along the guide chutes 3 in the base 24 by the positioning of rotating leading screw.Rectangular channel above the slide block is used to install adjusting slider 17.Semicircle support strip mounting groove 29 above the slide block is used for mounting support bar 27.The position of pin on the slide block, the pin hole of expression installing and locating pin, all the other 8 apertures are the screw hole that trip bolt is installed.
As shown in figure 15.Supporting covers 20 two, is the rectangular band slot shell; Supporting the via hole that there is semicircular location leading screw 22 at the center of covering base, 20 length direction both sides; Cover 20 cap surface two ends in supporting respectively has a connecting hole, and the top screw hole of this connecting hole and base 24 is corresponding.When location leading screw 22 is connected in the guide chute 3 that also together is placed in base 24 with slide block after, to support and cover 20 and be installed on the base 24 by attachment screw, the half slot of lower surface and the semicircle location leading screw mounting groove 30 of base 24 upper surfaces are covered in supporting, constitute the leading screw supporting base that supporting location leading screw 22 freely rotates, be used for installing and locating leading screw 22.
As shown in figure 21.Abutment sleeve 21 has two, is the cylindrical housings that two sides are processed with platform, is processed with locating slot on circular cylindrical shell body side surface platform.The endoporus of abutment sleeve 21 is circular, and its aperture is with the external diameter of location leading screw 22, and both are clearance fit.When location leading screw 22, slide block 19 and supporting cover 20 install after, the positioning of rotating leading screw, the position of adjusting slider makes the contiguous block of two slide blocks be close to the both sides of base 24 guide chutes 3 interfix pieces respectively, and the position of slide block is defined as initial position at this moment.Two abutment sleeves 21 are packed into from the two ends of location leading screw 22 respectively, and an end face that makes abutment sleeve 21 is close to the sidewall of base 24, stop screw passes the locating slot of abutment sleeve side, in the screw on the location leading screw 22 of packing into, has limited location leading screw moving axially in chute.
As shown in figure 17.Adjusting slider 17 is a blocks.Adjusting slider 17 has two, and its structure is identical, direction is opposite.Adjusting slider 17 is a symmetrical structure, and its cross section is cruciform.The both sides of the horizontal block of adjusting slider 17 have an open slot that connects this horizontal block thickness respectively; The guide chute 3 of adjusting slider 17 above slide block 19 moves, and after adjusting slider 17 positions were determined, trip bolt passed this open slot adjusting slider 17 is fixed on the slide block, and this open slot is along adjusting slider 17 center symmetries.At the middle part of adjusting slider 17, the threaded hole of perforation is arranged; This threaded hole cooperates with vertical set screw 18.The rectangular channel of adjusting slider 17 above slide block 19 slides the space of laying the bending fatigue sample with adjustment.
As shown in figure 18.Briquetting 16 is a blocks.Briquetting 16 has 2.The middle side edge of briquetting 16 has the mounting hole of the lateral adjustments screw 25 of perforation; Below lateral adjustments screw 25 mounting holes, the bottom of briquetting 16 sides, semi-circular recesses is arranged, be used to compress an end of support strip 27.The upper surface of briquetting 16 has two threaded holes, and the center line of this threaded hole is vertical mutually with the center line of lateral adjustments screw 25 mounting holes, and is distributed in the both sides of lateral adjustments screw 25 mounting holes.Threaded hole by briquetting 16 upper surfaces is connected with slide block 19.
As shown in figure 19.Block support strip briquetting 26 also has 2, is used to compress the other end of support strip 27.Support strip briquetting 26 central lower surface have and compress the circular groove that support strip 27 cooperates.Two connecting holes are arranged on the support strip briquetting 26, and the center line of this connecting hole is vertical mutually with the center line that compresses support strip 27 pressing groove, and is distributed in the both sides that compress support strip 27 pressing groove, by this connecting hole support strip briquetting 26 is connected with slide block 19.
As shown in figure 23.Slide block fixed head 28 is a rectangular block, and there is threaded hole at its middle part, is used for being connected of slide block fixed head 28 and slide block 19.After slide block 19 positions were determined, the threaded hole that passes slide block fixed head 28 middle parts with trip bolt was connected with slide block 19, and slide block 19 is fixed on the base 24 by the slide block fixed head.
Claims (10)
1. a ultrasonic bending fatigue experimental device of regulating the sample supporting-point automatically comprises low power displacement amplifier (6), connector (7) and transducer (10); The lower end of transducer (10) is connected by screw rod with connector (7); It is characterized in that, also comprise fulcrum arrangement (4) and force transmitters; And
A. transducer (10) is positioned at force transmitters; Force transmitters is positioned at the middle part of ultrasonic bending fatigue experimental device; Force transmitters comprises lower connecting plate (8), upper junction plate (9), transmission rod (11) and backing plate (12), and backing plate (12) is positioned at the top of force transmitters, and upper junction plate (9) and lower connecting plate (8) are positioned at the lower end of force transmitters; Be connected by three transmission rods (11) between backing plate (12) and upper junction plate (9) and the lower connecting plate (8); The lower connecting plate (8) that connector (7) one ends pass the force transmitters lower end is connected with low power displacement amplifier (6); The other end passes upper junction plate (9), is connected with transducer (10);
B. fulcrum arrangement (4) is positioned at low power displacement amplifier (6) below; Center pit and backing plate (12) that static load augmentor (13) passes backing plate (12) are connected;
C. fulcrum arrangement (4) is a symmetrical structure, comprises briquetting (16), adjusting slider (17), vertical set screw (18), slide block (19), supporting lid (20), abutment sleeve (21), location leading screw (22), handle (23), base (24), lateral adjustments screw (25), support strip briquetting (26), support strip (27) and slide block fixed head (28); The center that is installed in base (24) table top of two slide blocks (19) symmetry, two adjusting sliders (17) lay respectively in the chute on slide block (19) surface; Two supporting lids (20) lay respectively at the two ends of base (24) table top; Location leading screw (22) passes the location leading screw mounting groove that traverses the base table top, and by abutment sleeve (21) location; Support strip (27) is installed on the slide block (19), and briquetting (16), support strip briquetting (26) be the two ends of fixed bearing bar respectively.
2. a kind of according to claim 1 ultrasonic bending fatigue experimental device of automatic adjusting sample supporting-point is characterized in that, spacing block (14) is sleeved on the transmission rod (11) between lower connecting plate (8) and the upper junction plate (9); Transmission rod one end is connected with backing plate (12), and it is fixing that the other end successively passes upper junction plate (9), spacing block (14) and lower connecting plate (8) back.
3. a kind of according to claim 1 ultrasonic bending fatigue experimental device of automatic adjusting sample supporting-point is characterized in that, there is the through hole that cooperates with the experiment table locating shaft at the base plate center of base (24); There is the guide chute (3) of slide block (19) at the table top center of base (24), the centre bit of guide chute (3) is equipped with the locating piece that protrudes the chute inside surface, in the both sides of locating piece, be guide chute that is used to install slide block (19) (3) and the location leading screw mounting groove (30) that is interconnected from inside to outside.
4. a kind of according to claim 1 ultrasonic bending fatigue experimental device of automatic adjusting sample supporting-point is characterized in that, the contiguous block of slide block (19) is positioned at the guide chute (3) of base (24), and location leading screw (22) connecting hole is arranged on this contiguous block; There is the mounting groove of the adjusting slider (17) parallel with location leading screw (22) connecting hole on the contiguous block on the mounting blocks surface of slide block (19), and the center of the center of this mounting groove and location leading screw (22) connecting hole is on same vertical plane; The support strip mounting groove (29) vertical with adjusting slider (17) mounting groove arranged on slide block (19) mounting blocks surface on one side.
5. a kind of according to claim 1 ultrasonic bending fatigue experimental device of automatic adjusting sample supporting-point is characterized in that, location leading screw (22) middle part outside surface has two sections external threads that rotation direction is opposite; Two sections external threads together are placed in the guide chute (3) of base (24) respectively with after a slide block (19) is connected; There is the mounting hole of abutment sleeve at leading screw two ends, location; The two ends of location leading screw (22) are set with abutment sleeve (21), and make an end face of abutment sleeve (21) be close to the sidewall of base (24); Stop screw passes the locating slot of abutment sleeve side, in the screw on the location leading screw (22) of packing into; Abutment sleeve (21) is by endoporus and location leading screw (22) clearance fit.
6. a kind of according to claim 1 ultrasonic bending fatigue experimental device of automatic adjusting sample supporting-point is characterized in that, there is the via hole of semicircular location leading screw (22) at the center on supporting lid (20) base, both sides; There is connecting hole at cap surface two ends at supporting lid (20); When location leading screw (22) is connected in the guide chute (3) that also together is placed in base (24) with slide block after, to support lid (20) is fixed on the base (24), the half slot of lower surface and the semicircle location leading screw mounting groove (30) of base (24) upper surface are covered in supporting, have constituted the leading screw supporting base that supporting location leading screw (22) freely rotates.
7. a kind of according to claim 1 ultrasonic bending fatigue experimental device of automatic adjusting sample supporting-point is characterized in that, the both sides of adjusting slider (17) have open slot respectively, and this open slot is symmetrical in the center of adjusting slider (17), and the opening direction unanimity; There is the mounting hole of vertical set screw (18) at the center of adjusting slider (17).
8. a kind of according to claim 1 ultrasonic bending fatigue experimental device of automatic adjusting sample supporting-point is characterized in that, the middle side edge of briquetting (16) has the mounting hole of lateral adjustments screw (25); In the below of lateral adjustments screw (25) mounting hole, the bottom of briquetting (16) side, have and compress the groove that support strip (27) cooperates; The both sides of briquetting (16) upper surface set screw (25) mounting hole, the connecting hole of the orthogonal slide block of center line (19) of own centre line and lateral adjustments screw (25) mounting hole.
9. a kind of according to claim 1 ultrasonic bending fatigue experimental device of automatic adjusting sample supporting-point is characterized in that connecting hole on the support strip briquetting (26) is positioned to compress support strip (27) pressing groove both sides.
10. as the ultrasonic bending fatigue experimental device of a kind of automatic adjusting sample supporting-point as described in the claim 4, it is characterized in that, be slidingly matched between the guide chute (3) on slide block (19) and base (24) table top; The diameter of location leading screw mounting groove is with the external diameter of location leading screw (22).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010201788832U CN201653822U (en) | 2010-04-30 | 2010-04-30 | Ultrasonic bending fatigue testing device capable of automatically adjusting sample bearing points |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010201788832U CN201653822U (en) | 2010-04-30 | 2010-04-30 | Ultrasonic bending fatigue testing device capable of automatically adjusting sample bearing points |
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| CN201653822U true CN201653822U (en) | 2010-11-24 |
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| CN2010201788832U Expired - Fee Related CN201653822U (en) | 2010-04-30 | 2010-04-30 | Ultrasonic bending fatigue testing device capable of automatically adjusting sample bearing points |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101819114A (en) * | 2010-04-30 | 2010-09-01 | 西北工业大学 | Ultrasonic bending fatigue experimental device |
| CN102928305A (en) * | 2012-11-14 | 2013-02-13 | 中国建筑第八工程局有限公司 | Resonant mode composite material sheet fatigue tester |
| FR3008793A1 (en) * | 2013-07-22 | 2015-01-23 | Peugeot Citroen Automobiles Sa | FATIGUE TESTING DEVICE OF A TEST |
| CN105738236A (en) * | 2016-05-05 | 2016-07-06 | 西北工业大学 | Ultrasonic high-frequency ball wear fatigue test device |
| CN107269697A (en) * | 2017-07-07 | 2017-10-20 | 哈尔滨工业大学 | It is a kind of to bear the ultrasound suspending bearing of radial and axial load simultaneously |
| CN110426292A (en) * | 2019-08-06 | 2019-11-08 | 无锡锡洲电磁线有限公司 | Bend test device |
| CN111855447A (en) * | 2020-07-30 | 2020-10-30 | 四川大学 | Ultrasonic fatigue stress amplifying device with unified sample size |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101819114A (en) * | 2010-04-30 | 2010-09-01 | 西北工业大学 | Ultrasonic bending fatigue experimental device |
| CN102928305A (en) * | 2012-11-14 | 2013-02-13 | 中国建筑第八工程局有限公司 | Resonant mode composite material sheet fatigue tester |
| CN102928305B (en) * | 2012-11-14 | 2015-04-15 | 中国建筑第八工程局有限公司 | Resonant mode composite material sheet fatigue tester |
| FR3008793A1 (en) * | 2013-07-22 | 2015-01-23 | Peugeot Citroen Automobiles Sa | FATIGUE TESTING DEVICE OF A TEST |
| CN105738236A (en) * | 2016-05-05 | 2016-07-06 | 西北工业大学 | Ultrasonic high-frequency ball wear fatigue test device |
| CN105738236B (en) * | 2016-05-05 | 2018-04-27 | 西北工业大学 | A kind of ultrasound high frequency ball fretting fatigue experimental rig |
| CN107269697A (en) * | 2017-07-07 | 2017-10-20 | 哈尔滨工业大学 | It is a kind of to bear the ultrasound suspending bearing of radial and axial load simultaneously |
| CN107269697B (en) * | 2017-07-07 | 2019-07-16 | 哈尔滨工业大学 | A kind of ultrasound suspending bearing being able to bear at the same time radial and axial load |
| CN110426292A (en) * | 2019-08-06 | 2019-11-08 | 无锡锡洲电磁线有限公司 | Bend test device |
| CN111855447A (en) * | 2020-07-30 | 2020-10-30 | 四川大学 | Ultrasonic fatigue stress amplifying device with unified sample size |
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Granted publication date: 20101124 Termination date: 20120430 |