CN205426642U - Automatic centering device of metal tensile sample in low temperature environment proof box - Google Patents
Automatic centering device of metal tensile sample in low temperature environment proof box Download PDFInfo
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- CN205426642U CN205426642U CN201521039436.8U CN201521039436U CN205426642U CN 205426642 U CN205426642 U CN 205426642U CN 201521039436 U CN201521039436 U CN 201521039436U CN 205426642 U CN205426642 U CN 205426642U
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- 239000002184 metal Substances 0.000 title claims abstract description 96
- 230000008878 coupling Effects 0.000 claims abstract description 23
- 238000010168 coupling process Methods 0.000 claims abstract description 23
- 238000005859 coupling reaction Methods 0.000 claims abstract description 23
- 238000007667 floating Methods 0.000 claims description 21
- 241000397426 Centroberyx lineatus Species 0.000 claims description 9
- 230000033001 locomotion Effects 0.000 claims description 8
- 238000009413 insulation Methods 0.000 claims description 7
- 229920000742 Cotton Polymers 0.000 claims description 4
- 238000010276 construction Methods 0.000 claims description 4
- 239000011521 glass Substances 0.000 claims description 4
- 238000000429 assembly Methods 0.000 claims description 3
- 230000000712 assembly Effects 0.000 claims description 3
- 238000012360 testing method Methods 0.000 abstract description 19
- 238000009661 fatigue test Methods 0.000 abstract description 12
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract 1
- 238000006073 displacement reaction Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035807 sensation Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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Abstract
The utility model discloses an automatic centering device of metal tensile sample in low temperature environment proof box. Include the automatic aligning mechanism of centre gripping, coupling mechanism, locking mechanism and unsteady automatic centering mechanism, metal tensile sample clamping is locked through locking mechanism in the coupling mechanism, and automatic aligning mechanism of centre gripping and unsteady automatic centering mechanism are connected respectively to the lower extreme on the coupling mechanism, and unsteady automatic centering mechanism installs on the base, and the automatic aligning mechanism of centre gripping can reciprocate. The utility model discloses simple structure is practical, effectively reduces the energy consumption of environmental test incasement, realize the automatic alignment and the centering of metal tensile sample, reduced the error, ensured the precision to can realize the fatigue test under the metal tensile sample high -frequency, save the cost, reduce the wasting of resources.
Description
Technical field
This utility model relate to a kind of workpiece centralising device, more specifically, has especially related to the automatic centring device of metal tensile sample in a kind of low temperature environment proof box.
Background technology
At present, during metal stretching sample fatigue testing at low temperature, whether the templin chuck up and down of traditional fatigue rig makes us cannot judge metal stretching sample keeps Shaft alignment state in clamping process, metal stretching sample up and down clamping centering mainly by technical staff according to upper and lower clamping sequence, with sensation and experience complete the clamping of metal stretching sample, centering.In the case of low frequency or static tensile test, the centering problem up and down of metal stretching sample is often ignored by test technical staff owing to affecting less on result of the test.During metal stretching sample altofrequency fatigue test, axially bear stretching and the high frequency load of compression both direction due to metal stretching sample, solve that metal stretching sample clamps that centering problem just becomes up and down urgently.Prior art has lacked a kind of reliable metal stretching specimen clamping, centralising device, for obtaining result of the test accurately, improves the precision of test data, changes traditional metal stretching specimen clamping mode, and this is the key of solution problem.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, it is provided that the automatic centring device of metal tensile sample in a kind of low temperature environment proof box, can realize metal stretching sample holder automatic aligning and metal stretching sample automatic centering.
The purpose of this utility model is achieved through the following technical solutions:
This utility model includes clamping antomatic aligning mechanism, coupling mechanism, retaining mechanism and floating automatic centering mechanism, metal stretching specimen clamping is locked by retaining mechanism in coupling mechanism, coupling mechanism upper and lower side connects clamping antomatic aligning mechanism and floating automatic centering mechanism respectively, floating automatic centering mechanism is arranged on base, clamping antomatic aligning mechanism top is connected with hydraulic cylinder piston, hydraulic cylinder piston moves up and down under hydraulic cylinder drives, hydraulic cylinder piston connects the slide block at two ends through sliding bar, slide block is contained in cylindrical slideway and moves up and down, cylindrical slideway is fixed on base.
Described clamping antomatic aligning mechanism includes clamp, push rod and automatic aligning assembly, clamp upper end forms a fixed connection in being embedded into the hole slot of hydraulic cylinder piston, clamp bottom is provided with swallow-tail form chamber, intracavity end is more than outer end, the lateral symmetry of intracavity is equipped with identical two the automatic aligning assemblies of structure, the upper end of coupling mechanism is clamped in automatic aligning assembly, and automatic aligning assembly is connected by lever construction with push rod, realizes the up and down motion of automatic aligning assembly by swinging up and down of push rod.
Described automatic aligning assembly includes wedge shape fixture block, wedge shape clamping plate and guide post, and wedge shape fixture block is arranged on inside wedge shape clamping plate, and wedge shape clamping plate lateral wall is connected to the inwall in clamp swallow-tail form chamber；The medial surface of wedge shape clamping plate has groove, and the outside of wedge shape fixture block is provided with flange, and flange is embedded in groove；Flange is provided with shoulder hole vertically, guide post runs through and is contained in shoulder hole, the end face up and down of groove is provided with the locating slot inserting radially location for guide post, guide post is cased with stage clip, being provided with bar flange bottom guide post, stage clip top and bottom withstand on the step surface of shoulder hole and bar flange respectively.
Described coupling mechanism includes cryostat and the active centering connecting rod being placed in cryostat, driven centering connecting rod；Cryostat end face and bottom center have actively centring hole and driven centring hole, the top of actively centering connecting rod is through being clamped in after actively centring hole in described automatic aligning assembly two wedge shape fixture blocks, metal stretching sample top is installed in the centre bore of actively centering connecting rod bottom by retaining mechanism, metal stretching sample bottom is installed in the centre bore on driven centering connecting rod top by retaining mechanism, and the bottom of driven centering connecting rod is fixedly and coaxially connected with multi-directional ball after driven centring hole；Cryostat inwall is provided with illuminating lamp and temperature sensor, and cryostat is built with the low temperature extensometer towards metal stretching sample stretching position.
The spun-glass insulation that described cryostat sidewall is built-in with for insulation is cotton.
Described retaining mechanism includes that actively tight locking button, slave lock link closely, actively lock washer and driven lock washer；The top of metal stretching sample is the metal stretching sample actively end of thread, the centre bore of actively centering connecting rod bottom is active female thread connecting hole, metal stretching sample actively end of thread screw thread installs in active female thread connecting hole, and by the actively threaded locking of tight locking button；The bottom of metal stretching sample is metal stretching sample slave thread end, the centre bore on driven centering connecting rod top is driven female thread connecting hole, metal stretching sample slave thread end screw thread installs in driven female thread connecting hole, and is linked closely threaded locking by slave lock.
Described floating automatic centering mechanism includes that multi-directional ball snap close, semi-spherical grooves and XY are to slipway mechanism；In the spherical cavity that multi-directional ball clamping is formed between multi-directional ball snap close and semi-spherical grooves, fixed by left clamping screw and right clamping screw between multi-directional ball snap close and semi-spherical grooves, uniform multi-directional ball snap close annular pressure sensor is installed along the same circle spacing between multi-directional ball upper face and multi-directional ball snap close inwall, between multi-directional ball lower surface and semi-spherical grooves inwall, uniform semi-spherical grooves annular pressure sensor is installed along the same circle spacing；Fixing with semi-spherical grooves base bottom semi-spherical grooves being connected, the XY that semi-spherical grooves base is connected to move along the perpendicular both direction of level is to slipway mechanism.
Described XY to slipway mechanism particularly as follows: be provided with Y-direction motor on base, the output shaft coaxially connected Y-direction lead screw shaft of Y-direction motor, in Y-direction lead screw shaft, screw thread is cased with Y-direction threaded block, Y-direction threaded block is fixed on X direction guiding rail seat bottom face, and guide's X rail chair is arranged on Y-direction guide rail and moves horizontally along guide rail；X is installed to motor by X to lead screw shaft fixed mount on guide's X rail chair, X to the coaxially connected X of the output shaft of motor to lead screw shaft, X screw thread in lead screw shaft is cased with X to threaded block, X is fixed on semi-spherical grooves base bottom to threaded block, and semi-spherical grooves floor installation moves horizontally along guide rail on X direction guiding rail.
The wedged gap α formed between wedge shape fixture block lateral wall described in both sides is less than the wedge grip angle beta between the inwall of both sides, swallow-tail form chamber.
The beneficial effects of the utility model are:
1) active and driven centering connecting rod, simple and practical, effectively reduces the energy expenditure in environmental test chamber, provides basic for realizing the dynamic fatigue test under metal stretching sample low temperature environment；
2) realize automatic capturing and the centering of metal stretching sample, reduce the error of artificial centering, it is ensured that the precision of result of the test；
3) clamping automatic aligning part, has been effectively ensured connecting rod and test button has been in same axis, it is achieved the dynamic fatigue test under test button altofrequency；
4) package unit compact conformation, multiple functional, cost-effective, reduce the wasting of resources.
Accompanying drawing explanation
Fig. 1 is this utility model overall structure generalized section.
Fig. 2 is this utility model control system schematic diagram.
Fig. 3 clamps antomatic aligning mechanism enlarged drawing.
In figure: push rod 1；Wedge shape clamping plate 2；Locating slot 5；Guide post 6；Stage clip 7；Wedge shape fixture block 8；Clamp 9；Actively centering connecting rod 10；Driven centering connecting rod 11；Actively female thread connecting hole 12；Driven female thread connecting hole 13；Actively tight locking button 14；Slave lock links closely 15；Actively tight locking button female thread 16；Slave lock links closely female thread 17；The metal stretching sample actively end of thread 18；Metal stretching sample 19；Metal stretching sample slave thread end 20；Low temperature extensometer 21；Spun-glass insulation cotton 22；Cryostat inwall 23；Cryostat 24；Temperature sensor 25；Bare terminal end 26；Multi-directional ball 27；Driven end gasket seal 28；Drive end gasket seal 29；Driven lock washer 30；Actively lock washer 31；Driven centring hole 32；Actively centring hole 33；Ten thousand near miss snap closes 34；Semi-spherical grooves 35；Left clamping screw 36；Right clamping screw 37；Y-direction motor 38；Semi-spherical grooves annular pressure sensor 39；Multi-directional ball snap close annular pressure sensor 40；Y-direction lead screw shaft 41；X is to motor 42；Semi-spherical grooves base 45；Base 46；Controller 47；Hydraulic cylinder piston 48；Illuminating lamp 49；Cylindrical slideway 50；Slide block 51；X is to lead screw shaft 52；X is to lead screw shaft fixed mount 53；X is to threaded block 54；Y-direction threaded block 55；Y-direction guide rail 56；Guide's X rail chair 57；X direction guiding rail 58.
Detailed description of the invention
Below in conjunction with the accompanying drawings and this utility model is described in further detail by specific embodiment.
With embodiment, this utility model is described further below in conjunction with the accompanying drawings.Although this utility model will be described in conjunction with preferred embodiment, limit in the described embodiment it is to be appreciated that be not offered as this utility model.On the contrary, this utility model will contain alternative, modified model and the equivalent that can be included in the range of this utility model that appended claims limits.
As shown in Figure 1, this utility model includes clamping antomatic aligning mechanism, coupling mechanism, retaining mechanism and floating automatic centering mechanism, metal stretching sample 19 clamping is locked by retaining mechanism in coupling mechanism, coupling mechanism upper and lower side connects clamping antomatic aligning mechanism and floating automatic centering mechanism respectively, floating automatic centering mechanism is arranged on base 46, clamping antomatic aligning mechanism top is connected with hydraulic cylinder piston 48, hydraulic cylinder piston 48 moves up and down under hydraulic cylinder drives, hydraulic cylinder piston 48 connects the slide block 51 at two ends through sliding bar, slide block 51 is contained in cylindrical slideway 50 and moves up and down, cylindrical slideway 50 is fixed on base 46.Cylindrical slideway 50 is fixed on base 46, and hydraulic cylinder piston 48 pumps along cylindrical slideway 50 under the drive of sliding shoe 52.
Clamping antomatic aligning mechanism includes clamp 9, push rod 1 and automatic aligning assembly, clamp 9 upper end forms a fixed connection in being embedded into the hole slot of hydraulic cylinder piston 48, clamp 9 bottom is provided with swallow-tail form chamber, intracavity end is more than outer end, the lateral symmetry of intracavity is equipped with identical two the automatic aligning assemblies of structure, the upper end of coupling mechanism is clamped in automatic aligning assembly, and automatic aligning assembly is connected by lever construction with push rod 1, realizes the up and down motion of automatic aligning assembly by swinging up and down of push rod 1.
As it is shown on figure 3, automatic aligning assembly includes wedge shape fixture block 8, wedge shape clamping plate 2 and guide post 6, wedge shape fixture block 8 is arranged on inside wedge shape clamping plate 2, and wedge shape clamping plate 2 lateral wall is connected to the inwall in clamp 9 swallow-tail form chamber；Push rod 1 one end is hinged on wedge shape clamping plate 2, is hinged on clamp 9, is consequently formed lever construction in the middle part of push rod 1；The medial surface of wedge shape clamping plate 2 has groove, and the outside of wedge shape fixture block 8 is provided with flange, and flange is embedded in groove；Flange is provided with shoulder hole vertically, guide post 6 runs through and is contained in shoulder hole, the end face up and down of groove is provided with the locating slot 5 inserting radially location for guide post 6, guide post 6 is cased with stage clip 7, being provided with bar flange bottom guide post 6, stage clip 7 top and bottom withstand on the step surface of shoulder hole and bar flange respectively.The top of clamping coupling mechanism between two wedge shape fixture blocks 8 of both sides.
Jack-up wedge shape wedge shape clamping plate 2 after push rod 1 startup, wedge shape clamping plate open along wedge grip angle beta both sides；Wedge shape fixture block 8 is pushed up to position, the top by spring 7 in wedge shape wedge shape clamping plate 2, and now wedge shape fixture block 8 is in open configuration；Bare terminal end 26 is put in wedge shape fixture block 8, uses push rod 1 to press to wedge shape wedge shape clamping plate 2, drive wedge shape fixture block 8 to be clamped by bare terminal end 26；The wedged gap α of fixture block is less than the wedge grip angle beta of wedge shape clamping plate, bare terminal end 26 and wedge shape fixture block 8 have a less frictional force that wedge shape fixture block 8 just can be made to be clamped by bare terminal end 26 along the both sides displacement of α angle, along with pulling force (pressure) constantly increases, the clamping force of wedge shape fixture block 8 the most constantly increases, until bare terminal end 26 thoroughly to be clamped lock jail, thus form clamping antomatic aligning mechanism.
Coupling mechanism includes cryostat 24 and the active centering connecting rod 10 being placed in cryostat 24, driven centering connecting rod 11；Cryostat 24 end face and bottom center have actively centring hole 33 and driven centring hole 32, the top of actively centering connecting rod 10 is through being clamped in after actively centring hole 33 in described automatic aligning assembly two wedge shape fixture blocks 8, metal stretching sample 19 top is installed in the centre bore of actively centering connecting rod 10 bottom by retaining mechanism, metal stretching sample 19 bottom is installed in the centre bore on driven centering connecting rod 11 top by retaining mechanism, and the bottom of driven centering connecting rod 11 is fixedly and coaxially connected with multi-directional ball 27 after driven centring hole 32；Cryostat inwall 23 is provided with illuminating lamp 49 and temperature sensor 25, and cryostat 24 is built with the low temperature extensometer 21 stretching position towards metal stretching sample 19.
Metal stretching sample 19 is connected together with driven centering connecting rod 10 by actively centering connecting rod 11, and three forms one in the entirety axially not having relative displacement；Bare terminal end 26 is by wedge shape fixture block 8 positioning and locking；Driven centering connecting rod 11 end is processed to multi-directional ball 27, and multi-directional ball 27 is in floating state.
Cryostat 24 sidewall is built-in with the spun-glass insulation cotton 22 for insulation.
Active centering connecting rod 10, driven centering connecting rod 11 and metal stretching sample 19 are placed in cryostat 24 and carry out low temperature environment fatigue test by this utility model, avoid and whole clamp 9, multi-directional ball 27 are placed in cryostat 24, reduce heat consumption in case, temperature uniformity in guard box, saves the energy.
Actively centering connecting rod 10 bare terminal end 26 coordinates with actively centring hole 33；Driven centering connecting rod 11 coordinates with driven centring hole 32；Metal stretching sample 19 is coordinated by screw thread pair with actively centering connecting rod 10 and driven centering connecting rod 11；Actively centering connecting rod 10, driven centering connecting rod 11, actively centring hole 33, driven centring hole 32, multi-directional ball 27, actively female thread connecting hole 12, driven female thread connecting hole 13 form coupling mechanism.
Retaining mechanism includes that actively tight locking button 14, slave lock link closely 15, actively lock washer 31 and driven lock washer 30；The top of metal stretching sample 19 is the metal stretching sample actively end of thread 18, the centre bore of actively centering connecting rod 10 bottom is active female thread connecting hole 12, the metal stretching sample actively end of thread 18 screw thread installs in active female thread connecting hole 12, and by the actively threaded locking of tight locking button 14, actively between tight locking button 14 and active centering connecting rod 10 end face, it is provided with actively lock washer 31；The bottom of metal stretching sample 19 is metal stretching sample slave thread end 20, the centre bore on driven centering connecting rod 11 top is driven female thread connecting hole 13, metal stretching sample slave thread end 20 screw thread installs in driven female thread connecting hole 13, and linked closely 15 threaded lockings by slave lock, slave lock links closely and is provided with driven lock washer 30 between 15 and driven centering connecting rod 11 end face.
Actively cryostat 24 at centring hole 33 is outside is provided with for the most spacing drive end gasket seal 29, and the cryostat 24 at driven centring hole 32 is outside to be provided with for the most spacing driven end gasket seal 28 of driven centering connecting rod 11.
Gasket seal, for reducing the impact on cryostat inner cryogenic environment of the cryostat external environment condition, plays the effect sealing cryostat.Actively lock washer 16, actively tight locking button 14 eliminate the gap between screw thread pair, it is ensured that metal stretching sample 19 does not axially have relative displacement with actively centering connecting rod 10.Driven lock washer 30 and slave lock link closely the gap between 15 elimination screw thread pairs, it is ensured that metal stretching sample 19 and driven centering connecting rod 11 axially do not have relative displacement.
The end of thread 18 of metal stretching sample 19 coordinates with actively female thread connecting hole 12, and actively the end of thread 18 is locked by tight locking button 14 with actively lock washer 31；The end of thread 20 of metal stretching sample 19 coordinates with driven female thread connecting hole 13, and slave lock links closely and 15 locked by the end of thread 20 with driven lock washer 30.So, actively tight locking button, slave lock links closely, actively lock washer, driven locking shim pack become retaining mechanism.
Floating automatic centering mechanism includes that multi-directional ball snap close 34, semi-spherical grooves 35 and XY are to slipway mechanism；In the spherical cavity that multi-directional ball 27 clamping is formed between multi-directional ball snap close 34 and semi-spherical grooves 35, fixed by left clamping screw 36 and right clamping screw 37 between multi-directional ball snap close 34 and semi-spherical grooves 35, uniform multi-directional ball snap close annular pressure sensor 40 is installed along the same circle spacing between multi-directional ball 27 upper face and ten thousand near miss snap close 34 inwalls, between multi-directional ball 27 upper face and semi-spherical grooves 35 inwall, uniform semi-spherical grooves annular pressure sensor 39 is installed along the same circle spacing；Fixing with semi-spherical grooves base 45 bottom semi-spherical grooves 35 being connected, the XY that semi-spherical grooves base 45 is connected to move along the perpendicular both direction of level is to slipway mechanism.
XY to slipway mechanism particularly as follows: be provided with Y-direction motor 38 on base 46, the output shaft coaxially connected Y-direction lead screw shaft 41 of Y-direction motor 38, in Y-direction lead screw shaft 41, screw thread is cased with Y-direction threaded block 55, Y-direction threaded block 55 is fixed on guide's X rail chair 57 bottom surface, and guide's X rail chair 57 is arranged on Y-direction guide rail 56 and moves horizontally along guide rail；X is installed to motor 42 by X to lead screw shaft fixed mount 53 on guide's X rail chair 57, X to the coaxially connected X of output shaft of motor 42 to lead screw shaft 52, X screw thread in lead screw shaft 52 is cased with X to threaded block 54, X is fixed on bottom semi-spherical grooves base 45 to threaded block 54, and semi-spherical grooves base 45 is arranged on X direction guiding rail 58 and moves horizontally along guide rail.
The wedged gap α formed between wedge shape fixture block 8 lateral wall, both sides is less than the wedge grip angle beta between the inwall of both sides, swallow-tail form chamber.Wedge shape fixture block 8 can move up and down along wedged gap α.
Actively tight locking button 14 and to both tight locking buttons 15 coordinate, eliminate metal stretching sample 19 and actively female thread connecting hole 12, gap between metal stretching sample 19 and driven female thread connecting hole 13, it is ensured that metal stretching sample 19 and actively do not have relative movement between centering connecting rod 10 and driven centering connecting rod 11.
Y-direction motor 38 and X drives Y-direction lead screw shaft 41 and X to be finely adjusted semi-spherical grooves 35 position to lead screw shaft 52 respectively to motor 42, it is achieved floating multi-directional ball 27 does not stresses in radial direction, and power all can axially be transmitted at an arbitrary position；Left clamping screw 36 and right clamping screw 37 will be locked between multi-directional ball snap close 34 and semi-spherical grooves 35.
Actively centering connecting rod 10 coordinates with centring hole on cryostat 33, driven centering connecting rod 11 coordinates with centring hole under cryostat 32, and metal stretching sample 19 carries out cooling down, being incubated in cryostat 24；Gasket seal 29 coordinates with bare terminal end 26, gasket seal 29 coordinates with floating end 27, it is ensured that homogeneous temperature change in cryostat；Bare terminal end 26 is locked by wedge shape clamping plate 2, and actively centering connecting rod 10, metal stretching sample 19, driven centering connecting rod 11 three are on same axis, and multi-directional ball 27 is free floating state.
As shown in Figure 2, also include controller 47, temperature sensor 25, low temperature extensometer 21, semi-spherical grooves annular pressure sensor 39 and multi-directional ball snap close annular pressure sensor 40 are connected to the input interface of controller 47, the input interface of controller 47 is connected with hydraulic cylinder piston 48 through electromagnetic valve, the input interface of controller 47 is connected to motor 42 with Y-direction motor 38 and X, and the input interface of controller 47 is connected with the refrigeration compressor of cryostat 24 through driving motor.
Multi-directional ball snap close annular pressure sensor 40 transmits multi-directional ball snap close 34 and pressure signal, the semi-spherical grooves annular pressure sensor 39 of multi-directional ball 27 is transmitted the multi-directional ball 27 pressure signal to semi-spherical grooves 35, judges the position of metal stretching sample 19 off-axis according to this signal.
Multi-directional ball 27 under multi-directional ball tight locking button 34, semi-spherical grooves 35, left clamping screw 36 and 37 free floating states of right clamping screw is locked；Y-direction motor 38 drives Y-direction lead screw shaft to realize the semi-spherical grooves 35 movement in Y-direction position, and X realizes semi-spherical grooves 35 at X to the movement of position to motor 42X to lead screw shaft 52.
Low temperature extensometer 21 is fixed on the position in the middle of metal stretching sample 19, and low temperature extensometer 21 can detect the change of the axial displacement of metal stretching sample, and feed back to controller 47.21 signals of low temperature extensometer that the middle stretch section of metal stretching sample 19 is installed pass to controller 47, can conveniently observe the axial change in displacement situation of metal stretching sample 19.
Temperature sensor 25 is fixed on cryostat inwall 23, can monitor variations in temperature in cryostat in real time, and feed back to controller 47.
Metal stretching sample 19 in low temperature seal case 24 is observed by illuminating lamp 49 for convenient.Illuminating lamp 50 is arranged on cryostat inwall 23, and when needs viewing test phenomenon when, illuminating lamp 50 is opened, and otherwise closes illuminating lamp 50.
This utility model device is generally used for the automatic aligning of metal stretching sample, the automatic centering of metal stretching sample is to realize altofrequency fatigue test under metal stretching sample low temperature environment, it will nevertheless be understood that this utility model can be additionally used in the automatic centering of other analog.
It is of the present utility model that to be embodied as work process as follows:
Hydraulic cylinder piston 48 is controlled by controller 47, and hydraulic cylinder piston 48 drives clamping antomatic aligning mechanism, coupling mechanism, retaining mechanism, floating automatic centring device, it is achieved metal stretching sample 19 altofrequency fatigue test at low ambient temperatures.
Clamp 9 is fixed on hydraulic cylinder piston 48, guide post 6 inserts in the locating slot up and down 5 of wedge shape clamping plate 2, push rod 1 drives wedge shape clamping plate 2 to move up along wedge grip angle beta by leverage, under the effect of stage clip 7 and guide post 6, wedge shape fixture block 8 is inside wedge shape clamping plate 2, by top to enough height, open shape along wedged gap α simultaneously；Bare terminal end 26 is put in the middle of wedge shape fixture block 8, and wedge shape clamping plate 2 are inside clamp, under the drive of push rod 1, move downward along wedge grip angle beta, and wedge shape fixture block 8, inside wedge shape clamping plate 2, closes up along wedged gap α, positions and lock bare terminal end 26.
Under the effect of coupling mechanism, in the environment of metal stretching sample 19 is placed on a low temperature, it is to avoid put in cryostat 24 by whole clamp 9 and universal ball end 27, reduce the environmental chamber at low temperature thermoregulator time, reduce energy resource consumption.
Hemisphere grooved ring shape pressure transducer 39 transmits the pressure signal between multi-directional ball 27 and semi-spherical grooves 35, Y-direction motor 38 and X to motor 42 according to the size of semi-spherical grooves annular pressure sensor 39 signal, respectively lead screw shaft 41 and X is finely adjusted by Y-direction to lead screw shaft 52, guarantee that actively centering connecting rod 10, driven centering connecting rod 11, metal stretching sample 19 three do not stress in radial direction, and be in the axial direction on same axis.So bare terminal end 26 with the error brought in the connection procedure of wedge shape fixture block 8, on-line composition is by the error brought in screw thread pair and metal stretching sample 19 connection process, last all by the regulation of multi-directional ball 27 is eliminated, it is achieved actively centering connecting rod 10, metal stretching sample 19 and driven centering connecting rod 11 three are on same axis.
Left clamping screw 36 and right clamping screw 37 position and are fixed in multi-directional ball groove 35 by 34 multi-directional ball 27 of multi-directional ball snap close, keep multi-directional ball snap close annular pressure sensor 40 to pass to the pressure signal of controller 47 identical simultaneously.Pressure signal and temperature signal pass to controller 47, and low temperature the temperature inside the box is adjusted by controller 47 according to test requirements document so that it is reach the temperature that test is arranged, and be incubated about 15 minutes.
After pressure signal and temperature signal all meet test requirements document, controller 47 requires to be controlled hydraulic cylinder piston 48 according to fatigue testing at low temperature, hydraulic cylinder piston 48 drives clamping antomatic aligning mechanism, coupling mechanism and floating automatic centring device, it is achieved the fatigue test of metal stretching sample 19 under altofrequency.
With metal stretching sample total length as 120mm, middle effective diameter is 8mm, the end of thread is M16 × 1LH-7H-35, as a example by another end of thread is M16 × 1-7H-35, the a diameter of 23mm of actively centering connecting rod bare terminal end, a diameter of 42mm of non-clamping end, screw thread pair abutting end is M16 × 1LH-7h-40, driven centering connecting rod multi-directional ball diameter 48mm, screw thread pair abutting end is M16 × 1-7h-40.Article diameters scope clamped by wedge shape fixture block is 20-25mm.
The first step: starting push rod 1, under the effect of leverage, wedge shape clamping plate 2 open shape by jack-up and along wedge grip angle beta；Wedge shape fixture block 8, along with wedge shape clamping plate 2 are by spring 7 jack-up position topmost, is in open configuration along wedged gap α；Bare terminal end 26 is by actively centring hole 32, putting in wedge shape fixture block 8, push rod 1 presses to wedge shape clamping plate 2 so that it is close up along wedge grip angle beta both sides, wedge shape fixture block 8 closes up along wedged gap α under it drives simultaneously, and bare terminal end 26 and actively centering connecting rod 10 are positioned and lock.
Second step: the active end of thread 18 of metal stretching sample 19 coordinates with the active female thread connecting hole 12 of actively centering connecting rod 10, actively tight locking button 14 and active lock washer 31 eliminate the gap between the active end of thread 18 end face and active centering connecting rod 10 end face；Slave thread end 20 coordinates with the driven female thread connecting hole 13 of driven centering connecting rod 11, slave lock link closely 15 and driven lock washer 17 eliminate the gap between slave thread end 18 end face and driven centering connecting rod 11 end face；Now, actively centering connecting rod 10, metal stretching sample 19, driven centering connecting rod 11 three form an entirety, are on same axis, and the multi-directional ball 27 of driven centering connecting rod 11 end is floating free state.
3rd step: semi-spherical grooves 35 is near floating multi-directional ball 27, semi-spherical grooves annular pressure sensor 39 is triggered, controller 47 accepts semi-spherical grooves annular pressure sensor 39 signal, Y-direction motor 38 and X drives Y-direction lead screw shaft 41 and X to lead screw shaft 52 respectively to motor 42, control semi-spherical grooves 35 to move in X/Y plane, until semi-spherical grooves annular pressure sensor 39 signal held stationary；Left clamping screw 36 and 37 semi-spherical grooves 35 of right clamping screw and multi-directional ball snap close 34 are locked, and allow multi-directional ball snap close annular pressure sensor 39 signal held stationary simultaneously.
4th step: the temperature signal in 25 cryostates of temperature sensor passes to controller 47, the temperature value that control system is preset according to fatigue test, cryostat 24 the temperature inside the box is controlled so that it is reach the temperature of test requirements document；After temperature signal and centering signal all meet test requirements document, controller 47 controls the signal movement that hydraulic cylinder piston 48 gives according to test.
5th step: low temperature extensometer 25 detects the change of the axial displacement of metal stretching sample；After metal stretching sample fatigue fracture, 21 displacement signals of low temperature extensometer feed back to controller 47, and control system terminates the motion of electromagnetic valve, and hydraulic cylinder piston 48 stops, and test completes, and test data is carried out record.
Controller 47 in being embodied as is 32 single-chip microcomputers, the place-centric of semi-spherical grooves be limited in one substantially in the range of, obtained by experiment, and be previously stored in controller internal RAM and fix address space, when motor drives lead screw shaft to be finely adjusted semi-spherical grooves position, can have and be directly invoked by controller.
As can be seen here, this utility model is simple and practical, has prominent significant technique effect, can accurately realize automatic capturing and the centering of metal stretching sample, reduce the error of artificial centering, and can effectively reduce the energy expenditure in environmental test chamber, cost-effective, can be used for dynamic fatigue test.
Claims (8)
1. the automatic centring device of metal tensile sample in a low temperature environment proof box, it is characterised in that:
Including clamping antomatic aligning mechanism, coupling mechanism, retaining mechanism and floating automatic centering mechanism, metal stretching sample (19) clamping is locked by retaining mechanism in coupling mechanism, coupling mechanism upper and lower side connects clamping antomatic aligning mechanism and floating automatic centering mechanism respectively, floating automatic centering mechanism is arranged on base (46), clamping antomatic aligning mechanism top is connected with hydraulic cylinder piston (48), hydraulic cylinder piston (48) moves up and down under hydraulic cylinder drives, hydraulic cylinder piston (48) connects the slide block (51) at two ends through sliding bar, slide block (51) is contained in cylindrical slideway (50) and moves up and down, cylindrical slideway (50) is fixed on base (46)；
Described floating automatic centering mechanism includes that multi-directional ball snap close (34), semi-spherical grooves (35) and XY are to slipway mechanism；In the spherical cavity that multi-directional ball (27) clamping is formed between multi-directional ball snap close (34) and semi-spherical grooves (35), fixed by left clamping screw (36) and right clamping screw (37) between multi-directional ball snap close (34) and semi-spherical grooves (35), uniform multi-directional ball snap close annular pressure sensor (40) is installed along the same circle spacing between multi-directional ball (27) upper face and multi-directional ball snap close (34) inwall, uniform semi-spherical grooves annular pressure sensor (39) is installed along the same circle spacing between multi-directional ball (27) lower surface and semi-spherical grooves (35) inwall；Semi-spherical grooves (35) bottom is fixed with semi-spherical grooves base (45) and is connected, and the XY that semi-spherical grooves base (45) is connected to move along the perpendicular both direction of level is to slipway mechanism.
The automatic centring device of metal tensile sample in a kind of low temperature environment proof box the most according to claim 1, it is characterized in that: described clamping antomatic aligning mechanism includes clamp (9), push rod (1) and automatic aligning assembly, clamp (9) upper end forms a fixed connection in being embedded into the hole slot of hydraulic cylinder piston (48), clamp (9) bottom is provided with swallow-tail form chamber, intracavity end is more than outer end, the lateral symmetry of intracavity is equipped with identical two the automatic aligning assemblies of structure, the upper end of coupling mechanism is clamped in automatic aligning assembly, automatic aligning assembly is connected by lever construction with push rod (1), the up and down motion of automatic aligning assembly is realized by swinging up and down of push rod (1).
The automatic centring device of metal tensile sample in a kind of low temperature environment proof box the most according to claim 2, it is characterized in that: described automatic aligning assembly includes wedge shape fixture block (8), wedge shape clamping plate (2) and guide post (6), wedge shape fixture block (8) is arranged on wedge shape clamping plate (2) inner side, and wedge shape clamping plate (2) lateral wall is connected to the inwall in clamp (9) swallow-tail form chamber；The medial surface of wedge shape clamping plate (2) has groove, and the outside of wedge shape fixture block (8) is provided with flange, and flange is embedded in groove；Flange is provided with shoulder hole vertically, guide post (6) runs through and is contained in shoulder hole, the end face up and down of groove is provided with the locating slot (5) inserting radially location for guide post (6), guide post (6) is cased with stage clip (7), guide post (6) bottom is provided with bar flange, and stage clip (7) top and bottom withstand on the step surface of shoulder hole and bar flange respectively.
The automatic centring device of metal tensile sample in a kind of low temperature environment proof box the most according to claim 1, it is characterised in that: described coupling mechanism includes cryostat (24) and active centering connecting rod (10) being placed in cryostat (24), driven centering connecting rod (11)；Cryostat (24) end face and bottom center have actively centring hole (33) and driven centring hole (32), the top of actively centering connecting rod (10) is through being clamped in after actively centring hole (33) in described automatic aligning assembly two wedge shape fixture blocks (8), metal stretching sample (19) top is installed in the centre bore of actively centering connecting rod (10) bottom by retaining mechanism, metal stretching sample (19) bottom is installed in the centre bore on driven centering connecting rod (11) top by retaining mechanism, the bottom of driven centering connecting rod (11) is fixedly and coaxially connected with multi-directional ball (27) afterwards through driven centring hole (32)；Cryostat inwall (23) is provided with illuminating lamp (49) and temperature sensor (25), and cryostat (24) is built with the low temperature extensometer (21) towards metal stretching sample (19) stretching position.
The automatic centring device of metal tensile sample in a kind of low temperature environment proof box the most according to claim 4, it is characterised in that: the spun-glass insulation that described cryostat (24) sidewall is built-in with for insulation is cotton (22).
The automatic centring device of metal tensile sample in a kind of low temperature environment proof box the most according to claim 4, it is characterised in that: described retaining mechanism includes that actively tight locking button (14), slave lock link closely (15), actively lock washer (31) and driven lock washer (30)；The top of metal stretching sample (19) is the metal stretching sample actively end of thread (18), the centre bore of actively centering connecting rod (10) bottom is active female thread connecting hole (12), it is interior that the metal stretching sample actively end of thread (18) screw thread installs to actively female thread connecting hole (12), and by actively tight locking button (14) threaded locking；The bottom of metal stretching sample (19) is metal stretching sample slave thread end (20), the centre bore on driven centering connecting rod (11) top is driven female thread connecting hole (13), in metal stretching sample slave thread end (20) screw thread installs to driven female thread connecting hole (13), and linked closely (15) threaded locking by slave lock.
The automatic centring device of metal tensile sample in a kind of low temperature environment proof box the most according to claim 1, it is characterized in that: described XY to slipway mechanism particularly as follows: be provided with Y-direction motor (38) on base (46), the output shaft coaxially connected Y-direction lead screw shaft (41) of Y-direction motor (38), the upper screw thread of Y-direction lead screw shaft (41) is cased with Y-direction threaded block (55), Y-direction threaded block (55) is fixed on guide's X rail chair (57) bottom surface, and guide's X rail chair (57) is arranged on Y-direction guide rail (56) and moves horizontally along guide rail；X is installed to motor (42) by X to lead screw shaft fixed mount (53) on guide's X rail chair (57), X to the coaxially connected X of output shaft of motor (42) to lead screw shaft (52), X is cased with X to threaded block (54) to the upper screw thread of lead screw shaft (52), X is fixed on semi-spherical grooves base (45) bottom to threaded block (54), and semi-spherical grooves base (45) is arranged on X direction guiding rail (58) and moves horizontally along guide rail.
The automatic centring device of metal tensile sample in a kind of low temperature environment proof box the most according to claim 3, it is characterised in that: the wedged gap α formed between wedge shape fixture block (8) lateral wall described in both sides is less than the wedge grip angle beta between the inwall of both sides, swallow-tail form chamber.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521039436.8U CN205426642U (en) | 2015-12-15 | 2015-12-15 | Automatic centering device of metal tensile sample in low temperature environment proof box |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521039436.8U CN205426642U (en) | 2015-12-15 | 2015-12-15 | Automatic centering device of metal tensile sample in low temperature environment proof box |
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| CN205426642U true CN205426642U (en) | 2016-08-03 |
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| CN201521039436.8U Withdrawn - After Issue CN205426642U (en) | 2015-12-15 | 2015-12-15 | Automatic centering device of metal tensile sample in low temperature environment proof box |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105466761A (en) * | 2015-12-15 | 2016-04-06 | 浙江大学 | Automatic alignment device for metal tensile samples in low-temperature environment testing box |
| CN108896386A (en) * | 2018-06-07 | 2018-11-27 | 中国船舶重工集团公司第七二五研究所 | A kind of clamping device and its application method of sheet metal drawing by high temperature sample |
| CN110954286A (en) * | 2019-12-27 | 2020-04-03 | 武汉天拓宇航智能装备有限公司 | Self-alignment axial loading device |
| CN112697575A (en) * | 2020-12-24 | 2021-04-23 | 山东三越仪器有限公司 | Support tension-compression creep multifunctional testing machine |
-
2015
- 2015-12-15 CN CN201521039436.8U patent/CN205426642U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105466761A (en) * | 2015-12-15 | 2016-04-06 | 浙江大学 | Automatic alignment device for metal tensile samples in low-temperature environment testing box |
| CN105466761B (en) * | 2015-12-15 | 2018-01-12 | 浙江大学 | The automatic centring device of metal stretching sample in low temperature environment chamber |
| CN108896386A (en) * | 2018-06-07 | 2018-11-27 | 中国船舶重工集团公司第七二五研究所 | A kind of clamping device and its application method of sheet metal drawing by high temperature sample |
| CN110954286A (en) * | 2019-12-27 | 2020-04-03 | 武汉天拓宇航智能装备有限公司 | Self-alignment axial loading device |
| CN110954286B (en) * | 2019-12-27 | 2021-12-21 | 武汉天拓宇航智能装备有限公司 | Self-alignment axial loading device |
| CN112697575A (en) * | 2020-12-24 | 2021-04-23 | 山东三越仪器有限公司 | Support tension-compression creep multifunctional testing machine |
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Granted publication date: 20160803 Effective date of abandoning: 20180112 |