CN102175537A - Thermal medium bulging test machine - Google Patents
Thermal medium bulging test machine Download PDFInfo
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- CN102175537A CN102175537A CN 201110006787 CN201110006787A CN102175537A CN 102175537 A CN102175537 A CN 102175537A CN 201110006787 CN201110006787 CN 201110006787 CN 201110006787 A CN201110006787 A CN 201110006787A CN 102175537 A CN102175537 A CN 102175537A
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Abstract
The invention discloses a thermal medium bulging test machine, which mainly consists of a base, a vertical column, a middle beam, an upper beam, a blank cylinder, a heating furnace, a high pressure medium generation device, a bulging device, a bulging height measuring device, a pressure measuring device, an anti-oxidation device and a cooling device, wherein the vertical column is arranged on the base; the middle beam is arranged on the vertical column; the upper beam is arranged on the vertical column; the blank cylinder is arranged on the upper beam; the heating furnace is arranged between the middle beam and the upper beam; the high pressure medium generation device is arranged between the base and the middle beam; the bulging device is arranged in the heating furnace; the bulging height measuring device is arranged on the upper beam; the pressure measuring device is arranged at the outlet end of the high pressure medium device; the anti-oxidation device is connected with the side wall of the heating furnace through a pipeline; and the cooling device is connected with the outlet end of the high pressure medium device and an ejector rod through the pipeline. The base, the middle beam and the upper beam are integrally connected through bolts; the heating furnace is welded and fixed on the middle beam; a cooling separator is fixed on the blank cylinder through the bolts; the ejector rod is fixed on the cooling separator through the bolts; and a cooling water jacket is fixed on the middle beam through the bolts.
Description
Technical field
The invention belongs to hydraulic machinery and instrument automation field of measuring technique, particularly a kind of thermal medium bulging testing machine.
Background technology
In recent years, lightweight, energy-saving and cost-reducing, green manufacturing have proposed requirements at the higher level to Aero-Space and automotive field.Light materials such as aluminium alloy, titanium alloy, magnesium alloy, aluminium lithium alloy and compound substance have obtained widespread use, but these materials at room temperature plasticity is poor, use conventional art and be difficult to be shaped.Shaping of sheet material thermal medium forming technique thermal-arrest and liquid-filling shaping advantage are particularly suitable for above-mentioned light material and are shaped.Characteristics are that hydrodynamic pressure participates in the sheet material forming as important technical parameters, and the sheet material forming limit is significantly improved.Be applicable to that the Mechanics Performance Testing means that the sheet material thermal medium is shaped become the bottleneck that restricts this technical development.
High temperature one directional tensile test machine is the testing equipment that the simple stress strain stress relation extensively adopts under the simulation sheet material thermal environment.The unilateral stretching mechanical property has ubiquity, also be present sheet material thermal medium one of the main method of testing that is adopted that is shaped, but this is the compromise method that the checkout equipment condition restriction is taked.Adopt the sheet material bulging to obtain stress-strain diagram and be applicable to more that than unilateral stretching the sheet material thermal medium is shaped.At first, the bulging test can obtain the homogeneous strain of muching bigger than one directional tensile test, and reason is that the load unstability lags behind than unilateral stretching in the bulging test, and temperature influence is little; Secondly, material at high temperature unilateral stretching stress presents with the rapid decreasing phenomenon of strain, because constriction very easily produces under the high temperature, be difficult to therefore judge that it is that the authentic material that temperature causes softens that stress reduces, or inhomogeneous deformation is more serious; At last, sheet material arch summit is the two-way stretch stress state in the bulging test, and hydrodynamic pressure has resemble process as three-dimensional stress participation shaping than unilateral stretching and the shaping of sheet material thermal medium.The biaxial stretch-formed testing machine of high temperature is another important tests equipment that sheet material obtains stress-strain diagram.Adopt biaxial stretch-formed test material mechanical property, sample is generally cruciform.Be limited to this technical characterstic, sample two between centers angles easily produce stress and concentrate, and every still has the shortcoming that unilateral stretching shifts to an earlier date constriction.In addition, this technology is not considered the influence of hydrodynamic pressure yet.Adopt the biaxial stretch-formed testing machine of high temperature one directional tensile test machine and high temperature to obtain the sheet material stress-strain diagram and be used for sheet material thermal medium shaping existence than mistake.
Chinese invention patent " a kind of plastic tensile stress-strain method of testing and device " (publication number CN 101762682), proposed to adopt gas bulging plastic cement disk to obtain the method for stress-strain diagram, and proposed to realize the device of this method to comprise pressing system, tensioning system, measuring system, temperature control system and data handling system.This invention does not possess versatility to other materials test, and research technique relates to a kind of device, rather than a kind of testing machine of function systemization.
Researcher (S.Mahabunphachai, M.Koc.Investigations on forming of aluminum 5052and 6061 sheet alloys at warm temperatures.Materials and Design, 2010,31:2422-2434.) designed the easy device that bulging obtains the aluminum alloy plate materials stress-strain diagram, form by four parts: hydraulic pressure or baric systerm (pump, pressure transducer, transmitter), (the upper and lower mould diameter is 100mm to the bulging frock, radius of corner 6.5mm), heating system (heating tube, temperature controller and thermopair), non-contact measurement system (laser displacement sensor, the stereoscopic vision video camera).This easy device expanding die upper and lower mould connects by 12 bolts.Mold heated adopts heating tube, and the constant temperature protective device is not set, and there are heat interchange in mould and environment, and the plate test temperature is difficult to guarantee.
Summary of the invention
The present invention seeks in order to overcome above-mentioned shortcoming, a kind of thermal medium bulging testing machine is provided, make sheet material be expanded into arch by high-temperature pressure medium, record sagitta and bulging pressure, calculate stress-strain diagram by data handling system, this testing machine is paid attention to whole mechanical connection form, parts relative position relation and systematization function and is realized, is convenient to accurately test the sheet material stress-strain relation.
A kind of thermal medium bulging testing machine comprises base, column, intermediate transverse girder, entablature, heating furnace, flanging cylinder, high-pressure medium generation device, bulging device, sheet material sagitta measurement mechanism, device for pressure measurement, cooling device, temperature-detecting device, anti-oxidation device and data handling system;
Column is installed on the base, and entablature is fixed on the top of column, and intermediate transverse girder is fixed on the column between base and the entablature;
Heating furnace comprises casing, heating furnace top cover, heat-insulation layer, heating unit, heat insulation backing plate, swash partition and sagitta measurement mouth, casing is fixed on the intermediate transverse girder, the casing middle part forms the working chamber of heating furnace, the heating furnace top cover is connected in the casing top, heat-insulation layer is fixed on the casing, and heating unit is fixedly on the heat-insulation layer; Swash partition is positioned at the heat-insulation layer outside, is positioned at the most inboard of heating furnace, is fixed on heating furnace top cover lower surface and intermediate transverse girder upper surface, and heating unit and working chamber are separated; Heat insulation backing plate is positioned at the working chamber lower end, is fixed on the intermediate transverse girder; Sagitta is measured mouth and is positioned on the heating furnace top cover;
Temperature-detecting device comprises temperature sensor, and temperature sensor detects the temperature of working chamber, sheet material, pressure medium and the bulging device of heating furnace;
The flanging cylinder is installed on the entablature, and flanging cylinder lower end connects cooled partition, and cooled partition connects an end of knock-pin, and the other end of knock-pin passes the hole of reserving on the heating furnace top cover, connects the bulging patrix;
Bulging device comprises bulging patrix and high-pressure medium die cavity, and bulging patrix and high-pressure medium die cavity are positioned at the working chamber that swash partition surrounds, and the bulging patrix is fixed on the knock-pin, and the high-pressure medium die cavity is fixed on the heat insulation backing plate;
Cooling device mainly comprises cooled partition, cooling-water pump, exchange heat unit and cooling jacket, cooling jacket is fixed on the intermediate transverse girder bottom surface, the water delivering orifice of cooling-water pump is connected with cooling line, cooling line is divided into two-way, connect cooled partition and cooling jacket respectively, the other end of cooled partition, the other end of cooling jacket are connected with heat exchange unit by cooling line respectively, and heat exchange unit is connected with the water inlet of cooling-water pump again;
The high-pressure medium generation device is installed between base and the intermediate transverse girder, and the bottom of high-pressure medium generation device connects base by cushion block, and the interstitial hole that high-pressure medium generation device endpiece passes cooled partition and intermediate transverse girder is connected on the high-pressure medium die cavity;
Sheet material sagitta measurement mechanism comprises support and displacement transducer, and support is fixed on the entablature, and displacement transducer is fixed on the support, and the real-time sheet material measurement sagitta of displacement transducer also inputs to data handling system with electrical signal form;
Device for pressure measurement is installed in the endpiece of high-pressure medium generation device, comprises pressure transducer, and the pressure of the real-time detected pressures medium of pressure transducer also inputs to data handling system with electrical signal form;
Anti-oxidation device is connected with heating furnace by pipeline, is used to prevent the interior sheet material oxidation to be measured of working chamber of heating furnace;
Data handling system is obtained the pressure of the pressure medium of the high-pressure medium generation device generation that pressure transducer detects in the device for pressure measurement in real time, obtain the sagitta of the sheet material that displacement transducer detects in the sheet material sagitta measurement mechanism in real time, when the absolute value of sheet material sagitta that measures and predefined Theoretical Calculation sagitta difference satisfies the setting tolerance, record force value and sagitta at this moment, then, change the Theoretical Calculation sagitta, repeat said process, at last, a series of pressure and sagitta that data handling system will obtain are calculated and are converted to stress-strain diagram.
The invention has the advantages that:
(1) the thermal medium bulging process of testing machine employing can obtain than the big a lot of homogeneous strain of one directional tensile test, and the constitutive equation of the stress-strain relation match that the test of application bulging records has better extrapolation ability;
(2) the thermal medium bulging process of testing machine employing, sheet material arch summit is the two-way stretch stress state, and hydrodynamic pressure has resemble process as three-dimensional stress participation shaping with the shaping of sheet material thermal medium;
(3) testing machine is controlled flanging cylinder locked mode and unlatching, automaticity height with proportional servo valve;
(4) the testing machine heating furnace heats and thermostatic control sheet material, mould, pressure medium, and intensification efficient height, error are little;
(5) the testing machine cooling device cools off high-pressure medium generation device endpiece, knock-pin, and the shielding heating furnace is to the outer parts heat conduction of stove, protection test machine main body;
(6) the anti-oxidation device of testing machine completely cuts off sheet material to be measured and airborne oxygen, guarantees material actual performance under the high temperature;
(7) testing machine high-pressure medium generation device high-pressure side (endpiece) is connected with the pressure medium die cavity, high-pressure side links to each other with the high-pressure medium storage container, low pressure end adopts normal hydraulic oil to drive, and high-pressure side does not link to each other with low pressure end, is convenient to high-pressure side and low pressure end and adopts the different pressures medium;
(8) tester base, intermediate transverse girder, entablature connect into integral body by bolt, and flanging cylinder, heating furnace, high-pressure medium generation device are fixed on it, and integral rigidity is good;
(9) testing machine is not only applicable to be lower than 400 ℃ bulging test, and being particularly useful for high temperature (〉=750 ℃) and shaping medium is the situation of pressed powder.
Description of drawings
Fig. 1 is a thermal medium bulging testing machine structure synoptic diagram of the present invention;
Fig. 2 is a thermal medium bulging testing machine hydraulic schematic diagram of the present invention;
Fig. 3 is a method flow diagram of the present invention;
Among the figure: 1-base, 2-column, 3-high-pressure medium generation device, 4-high pressure chest, the 5-endpiece, 6-intermediate transverse girder, 7-heating furnace, the 8-pressure medium, 9-bulging patrix, 10-working chamber, the 11-swash partition, 12-knock-pin, 13-cooled partition, 14-flanging cylinder, 15-entablature, 16-support, the 17-displacement transducer, the 18-sagitta is measured mouth, 19-heating furnace top cover, the 20-heating unit, 21-heat-insulation layer, 22-sheet material, 23-heating furnace casing, 24-high-pressure medium die cavity, the heat insulation backing plate of 25-, the 26-cooling jacket, 27-low-pressure cavity, 28-piston, the 29-cushion block, 30-sheet material sagitta measurement mechanism, 31-temperature-detecting device, the 32-device for pressure measurement, 33-drives oil pump, 34-cooling-water pump, the 35-heat exchange unit, the 36-proportional servo valve, the 37-low-pressure cavity drives oil pump.
Embodiment
The present invention is described in further detail below in conjunction with drawings and Examples.
The present invention is a kind of thermal medium bulging testing machine, as shown in Figure 1 and Figure 2, thermal medium bulging testing machine mainly comprises base 1, column 2, intermediate transverse girder 6, entablature 15, heating furnace 7, flanging cylinder 14, high-pressure medium generation device 3, bulging device, sheet material sagitta measurement mechanism 30, device for pressure measurement 32, cooling device, temperature-detecting device 31 and anti-oxidation device.
Heating furnace 7 is fixed by welding on the intermediate transverse girder 6, heating furnace 7 comprises casing 23, heating furnace top cover 19, heat-insulation layer 21, heating unit 20, heat insulation backing plate 25, swash partition 11 and sagitta are measured mouth 18, casing 23 is fixed by welding on the intermediate transverse girder 6, casing 23 can surround circle, the middle part forms the working chamber 10 of heating furnace 7, heating furnace top cover 19 is connected above the casing 23, heat-insulation layer 21 is by being bolted on the casing 23, heat-insulation layer 21 is used to shield working chamber 10 interior heats and environment carries out heat interchange, guarantee the accuracy of sheet material 22 bulging temperature, heating unit 20 is by on the bolt heat-insulation layer 21, be used for to the bulging patrix 9 in the working chamber 10, high-pressure medium die cavity 24, sheet material 22, pressure medium 8 heating, heating unit 20 can be a heating tube, resistance wire, fuel or deep fat etc.Swash partition 11 is positioned at heat-insulation layer 21 outsides, be positioned at the most inboard of heating furnace 7, be fixed by welding in heating furnace top cover 19 lower surfaces and intermediate transverse girder 6 upper surfaces, and heating unit 20 and working chamber 10 separated, swash partition 11 is used for preventing when sheet material 22 bursts that pressure medium 8 splashes are at heating unit 20.Heat insulation backing plate 25 is positioned at working chamber 10 lower ends, by being bolted on the intermediate transverse girder 6, plays heat insulation effect.Heat insulation backing plate 25 can be asbestos gauge, corundum or other fire resistive materials; Sagitta is measured mouth 18 and is positioned on the heating furnace top cover 19, by being adhesively fixed on the heating furnace top cover 19, it can be clear glass or the suprasil plate that makes things convenient for the laser displacement sensor test that sagitta is measured mouth 18, also can be the dividing plate with holes that makes things convenient for the test of mechanical type displacement transducer, heating furnace 7 raises working chamber 10 temperature and guarantees that sheet material 22 to be measured is stabilized on the temperature of a certain setting.
As shown in Figure 2, temperature-detecting device 31 comprises temperature sensor, screw and bearing, and bearing is by being bolted on the heating furnace 7, temperature sensor by screw retention on bearing.Temperature-detecting device 31 has 4 covers, is respectively applied for the temperature of the working chamber 10, sheet material 22, pressure medium 8 and the bulging device that detect heating furnace 7.Temperature sensor can be a contact, also can be contactless.
Flanging cylinder 14 is installed on the entablature 15.Flanging cylinder 14 lower ends connect cooled partition 13, cooled partition 13 connects an end of knock-pin 12 by bolt, the other end of knock-pin 12 passes the hole of reserving on the heating furnace top cover 19, connect bulging patrix 9 by bolt, flanging cylinder 14 drives knock-pin 12 by cooled partition 13 and moves up and down, and bulging patrix 9 is carried out locked mode and unlatching.Use among the present invention and drive moving of oil pump 33, proportional servo valve control flanging cylinder 14.
Bulging device is installed in the working chamber 10 of heating furnace 7, bulging device comprises bulging patrix 9 and high-pressure medium die cavity 24, bulging patrix 9 is positioned at the working chamber 10 that swash partition 11 surrounds with high-pressure medium die cavity 24, bulging patrix 9 is by being bolted on the knock-pin 12, high-pressure medium die cavity 24 is by being bolted on the heat insulation backing plate 25, bulging patrix 9 is used for the bulging shape that is pressed in sheet material 22 on the high-pressure medium die cavity 24 and guarantees sheet material 22, and sheet material 22 can be metal, compound substance, macromolecular material.The quantity of knock-pin 12 can be 2,3,4,6 and 8.The center hole shape that the bulging shape of sheet material 22 is reserved by bulging patrix 9 determines that it can be circle, ellipse or cruciform that bulging patrix 9 is reserved center pit.
Cooling device mainly comprises cooled partition 13, cooling-water pump 34, exchange heat unit 35 and cooling jacket 26, cooling jacket 26 is by being bolted on intermediate transverse girder 6 bottom surfaces, the water delivering orifice of cooling-water pump 34 is connected with cooling line by bolt, cooling line is divided into two-way, connect cooled partition 13 and cooling jacket 26 respectively, the other end of the other end of cooled partition 13, cooling jacket 26 is connected with heat exchange unit 35 by cooling line respectively, and heat exchange unit 35 is connected by bolt with the water inlet of cooling-water pump 34 again.Described cooling line can be plastic tube, pvc pipe, metal tube or rubber tube.
The water cycle loop of cooling device has 2 the tunnel, the 1 tunnel to be cooling-water pump 34 water delivering orifices-cooled partition 13-heat exchange unit 35-cooling-water pump 34 water inlets; Another road is cooling-water pump 34 water delivering orifices-cooling jacket 26-heat exchange unit 35-cooling-water pump 34 water inlets; Cooling device is used to cool off the knock-pin 12 that is deep into heating furnace 7 working chambers 10 and the endpiece 5 of high-pressure medium generation device 3, prevents that heat transferred are on the testing machine main body in the heating furnace 7.Described exchange heat unit 35 can be water tank, pond, cooling tower, blower fan, oil cooling machine or air-conditioning.
High-pressure medium generation device 3 is installed between base 1 and the intermediate transverse girder 6, the bottom of high-pressure medium generation device 3 connects base 1 by cushion block 29, cushion block 29 is used for supporting and fixing high-pressure generation device 3, high-pressure medium generation device 3 comprises low-pressure cavity 27, high pressure chest 4, piston rod and piston 28, piston 28 is arranged in low-pressure cavity 27, pressure medium 8 is positioned at high pressure chest 4, low-pressure cavity driving oil pump 37 is used to drive low-pressure cavity 27 inner carriers 28 and moves up and down, and piston rod is connected with piston 28 by bolt.The interstitial hole that high-pressure medium generation device 3 endpiece 5 pass cooling jacket 26 and intermediate transverse girder 6 is connected on the high-pressure medium die cavity 24 by bolt, high-pressure medium generation device 3 is used for pressure medium 8 is suppressed to set pressure, and acts on to sheet material 22 by high-pressure medium die cavity 24.High-pressure medium generation device 3 can be supercharger, dupler, amplifier, manual pump, electrodynamic pump, common oil cylinder, servo-cylinder, common cylinder, servo cylinder, digital oil cylinder or digital cylinder.Pressure medium 8 can be nitrogen, inert gas, oil, low-melting-point metal, macromolecular material, fine sand or ceramic particle.
Sheet material sagitta measurement mechanism 30 is installed on the entablature 15, mainly comprise support 16, displacement transducer 17 and screw, support 16 is fixed by welding on the entablature 15, on support 16, displacement transducer 17 real-time sheet material measurement 22 sagitta also input to data handling system with electrical signal form to displacement transducer 17 by screw retention.Displacement transducer 17 can be spring reset mechanical type displacement transducer or non-contact laser displacement transducer.
Device for pressure measurement 32 is installed in the endpiece 5 of high-pressure medium generation device 3, mainly comprise pressure duct, pressure transducer and joint, pressure duct by joint by being threaded in high-pressure medium generation device 3 endpiece 5, pressure duct connects pressure transducer again, and the pressure of the real-time detected pressures medium 8 of pressure transducer also inputs to data handling system with electrical signal form.
Anti-oxidation device is connected with heating furnace 7 by pipeline, is used to prevent sheet material to be measured 22 oxidations in the working chamber 10 of heating furnace 7 and material property is changed, to guarantee the material property authenticity.Anti-oxidation device can be the gas shield form, and blanket gas can be nitrogen or inert gas; Anti-oxidation device also can be the vacuum protection form.
Testing machine also comprises data handling system, data handling system is obtained the pressure of the pressure medium 8 of high-pressure medium generation device 3 generations that pressure transducer detects in the device for pressure measurement 32 in real time, obtain the sagitta of the sheet material 22 that displacement transducer 17 detects in the sheet material sagitta measurement mechanism 30 in real time, when the absolute value of sheet material 22 sagitta that measure and predefined Theoretical Calculation sagitta difference satisfies the setting tolerance, record force value and sagitta at this moment, then, change the Theoretical Calculation sagitta, repeat said process, at last, stress-strain diagram is calculated and be converted to a series of pressure and sagitta that data handling system will obtain.
A kind of sheet material stress-strain test method of using described thermal medium bulging testing machine of the present invention, flow process comprises following step as shown in Figure 3:
(1) place tested sheet material 22, normal hydraulic oil drives flanging cylinder 14, and board under test material 22 is carried out the flanging locked mode, prevents that sheet material 22 is walked material in the bulging process.
(2) opening cooling-water pump 34 cools off;
(3) open heating furnace 7 switches then;
(4) adjustment is arrived setting value T
1, stable a period of time is warming up to design temperature T
1, guarantee that sheet material 22, bulging device temperature are even.
(5) normal hydraulic oil drives high-pressure medium generation device 3 output pressure media 8, makes sheet material begin bulging;
(6) set the required rate of strain e of test
1
(7) at time step t
1, the sagitta of monitoring is h in real time
1, the Theoretical Calculation sagitta is h
a,, by data handling system with h
aWith h
1Compare, work as h
1＜h
aThe time, actual sagitta is described less than theoretical value, increase high-pressure medium generation device 3 high-pressure sides 4 pressure p
1, then sheet material 22 continues to expand high;
(8) as | h
1-h
b| during less than the setting tolerance, think that actual sagitta equals theoretical value, record sagitta h this moment
1And force value p
1
(9) work as h
1＞h
aThe time, illustrate that actual sagitta has surpassed theoretical value, then goes on foot t computing time
2Sagitta theoretical value h
b, this moment, the sagitta of monitoring was h in real time
2, work as h
2＜h
bThe time, actual sagitta is described less than theoretical value, increase high-pressure medium generation device 3 high-pressure sides 4 pressure p
2, then sheet material 22 continues to expand high;
(10) as | h
2-h
b| when setting tolerance, think actual sagitta h
2Equal theoretical value h
b, record sagitta h this moment
2And force value p
2
(11) repeat (7)-(10), enter and burst preceding time step t
n, the sagitta of monitoring is h in real time
n, the Theoretical Calculation sagitta is h
m,, by data handling system with h
nWith h
mCompare, work as h
n＜h
mThe time, actual sagitta is described less than theoretical value, increase high-pressure medium generation device 3 high-pressure sides 4 pressure p
n, then sheet material 22 continues the height that expands, record sagitta h this moment
nAnd force value p
n
(10) can obtain rate of strain e like this
1Under sagitta h
1-h
nWith the bulging pressure p
1-p
n, sheet material sagitta and the bulging pressure of record calculated by data handling system is converted to stress-strain diagram, by monitoring interface preservation data and with the graphic form curve of output;
(11) by changing the design temperature and (6) the middle rate of strain value of setting in (4), repeating step (7)-(11) can obtain the stress-strain diagram under different temperatures and the differently strained speed;
(12) in the sheet material bulging process, when next time step and a last time pressure reduction of record when negative, show that sheet material bursts, send control signal and make high-pressure medium generation device 18 shut down also pressure releases, to guarantee experimental safe.
(13) close heating furnace 7, switch off the pump 34, off-test.
Claims (9)
1. thermal medium bulging testing machine, it is characterized in that, comprise base, column, intermediate transverse girder, entablature, heating furnace, flanging cylinder, high-pressure medium generation device, bulging device, sheet material sagitta measurement mechanism, device for pressure measurement, cooling device, temperature-detecting device, anti-oxidation device and data handling system;
Column is installed on the base, and entablature is fixed on the top of column, and intermediate transverse girder is fixed on the column between base and the entablature;
Heating furnace comprises casing, heating furnace top cover, heat-insulation layer, heating unit, heat insulation backing plate, swash partition and sagitta measurement mouth, casing is fixed on the intermediate transverse girder, the casing middle part forms the working chamber of heating furnace, the heating furnace top cover is connected in the casing top, heat-insulation layer is fixed on the casing, and heating unit is fixedly on the heat-insulation layer; Swash partition is positioned at the heat-insulation layer outside, is positioned at the most inboard of heating furnace, is fixed on heating furnace top cover lower surface and intermediate transverse girder upper surface, and heating unit and working chamber are separated; Heat insulation backing plate is positioned at the working chamber lower end, is fixed on the intermediate transverse girder; Sagitta is measured mouth and is positioned on the heating furnace top cover;
Temperature-detecting device comprises temperature sensor, and temperature sensor detects the temperature of working chamber, sheet material, pressure medium and the bulging device of heating furnace;
The flanging cylinder is installed on the entablature, and flanging cylinder lower end connects cooled partition, and cooled partition connects an end of knock-pin, and the other end of knock-pin passes the hole of reserving on the heating furnace top cover, connects the bulging patrix;
Bulging device comprises bulging patrix and high-pressure medium die cavity, and bulging patrix and high-pressure medium die cavity are positioned at the working chamber that swash partition surrounds, and the bulging patrix is fixed on the knock-pin, and the high-pressure medium die cavity is fixed on the heat insulation backing plate;
Cooling device mainly comprises cooled partition, cooling-water pump, exchange heat unit and cooling jacket, cooling jacket is fixed on the intermediate transverse girder bottom surface, the water delivering orifice of cooling-water pump is connected with cooling line, cooling line is divided into two-way, connect cooled partition and cooling jacket respectively, the other end of cooled partition, the other end of cooling jacket are connected with heat exchange unit by cooling line respectively, and heat exchange unit is connected with the water inlet of cooling-water pump again;
The high-pressure medium generation device is installed between base and the intermediate transverse girder, and the bottom of high-pressure medium generation device connects base by cushion block, and the interstitial hole that high-pressure medium generation device endpiece passes cooled partition and intermediate transverse girder is connected on the high-pressure medium die cavity;
Sheet material sagitta measurement mechanism comprises support and displacement transducer, and support is fixed on the entablature, and displacement transducer is fixed on the support, and the real-time sheet material measurement sagitta of displacement transducer also inputs to data handling system with electrical signal form;
Device for pressure measurement is installed in the endpiece of high-pressure medium generation device, comprises pressure transducer, and the pressure of the real-time detected pressures medium of pressure transducer also inputs to data handling system with electrical signal form;
Anti-oxidation device is connected with heating furnace by pipeline, is used to prevent the interior sheet material oxidation to be measured of working chamber of heating furnace;
Data handling system is obtained the pressure of the pressure medium of the high-pressure medium generation device generation that pressure transducer detects in the device for pressure measurement in real time, obtain the sagitta of the sheet material that displacement transducer detects in the sheet material sagitta measurement mechanism in real time, when the absolute value of sheet material sagitta that measures and predefined Theoretical Calculation sagitta difference satisfies the setting tolerance, record force value and sagitta at this moment, then, change the Theoretical Calculation sagitta, repeat said process, at last, a series of pressure and sagitta that data handling system will obtain are calculated and are converted to stress-strain diagram.
2. a kind of thermal medium bulging testing machine according to claim 1 is characterized in that described base, column, intermediate transverse girder, entablature connect into integral body by bolt.
3. a kind of thermal medium bulging testing machine according to claim 1 is characterized in that described temperature-detecting device comprises temperature sensor, screw and bearing, and bearing is by being bolted on the heating furnace, temperature sensor by screw retention on bearing.
4. a kind of thermal medium bulging testing machine according to claim 1 is characterized in that, described temperature-detecting device has 4 covers, is respectively applied for the temperature of the working chamber, sheet material, pressure medium and the bulging device that detect heating furnace.
5. a kind of thermal medium bulging testing machine according to claim 1 is characterized in that described anti-oxidation device is gas shield form or vacuum protection form, and during the gas shield form, blanket gas is nitrogen or inert gas.
6. a kind of thermal medium bulging testing machine according to claim 1, it is characterized in that, described device for pressure measurement comprises pressure duct, pressure transducer and joint, and by being threaded in high-pressure medium generation device endpiece, pressure duct connects pressure transducer to pressure duct again by joint.
7. a kind of thermal medium bulging testing machine according to claim 1 is characterized in that the quantity of described knock-pin is 2,3,4,6 or 8.
8. a kind of thermal medium bulging testing machine according to claim 1 is characterized in that, the center hole shape that the bulging shape of described sheet material is reserved by the bulging patrix determines that it is circle, ellipse or cruciform that the bulging patrix is reserved center pit.
9. according to any described a kind of thermal medium bulging testing machine in the claim 1 to 8, it is characterized in that described heating unit is heating tube, resistance wire, fuel or deep fat; Heat insulation backing plate is asbestos gauge or corundum; It is clear glass, suprasil plate or dividing plate with holes that sagitta is measured mouth; Sheet material is metal, compound substance or macromolecular material; Cooling line is plastic tube, pvc pipe, metal tube or rubber tube; The exchange heat unit is water tank, pond, cooling tower, blower fan, oil cooling machine or air-conditioning; The high-pressure medium generation device is supercharger, dupler, amplifier, manual pump, electrodynamic pump, common oil cylinder, servo-cylinder, common cylinder, servo cylinder, digital oil cylinder or digital cylinder; Temperature sensor is a contact or contactless; Pressure medium is nitrogen, inert gas, oil, low-melting-point metal, macromolecular material, fine sand or ceramic particle; Displacement transducer is spring reset mechanical type displacement transducer or non-contact laser displacement transducer.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102878840A (en) * | 2012-09-29 | 2013-01-16 | 中国航天空气动力技术研究院 | Non-oxidation split charging device and non-oxidation split charging method for manufacturing alkali-metal high-temperature heat tubes |
| CN103056215A (en) * | 2012-12-27 | 2013-04-24 | 北京航空航天大学 | Warm/hot medium hydro-forming device for sheets |
| CN104280294A (en) * | 2014-10-15 | 2015-01-14 | 北京航空航天大学 | Dynamic temperature measuring device in high-temperature breaking strength tensile test |
| CN104849142A (en) * | 2015-05-18 | 2015-08-19 | 北京航空航天大学 | Multidirectional loading universal metal plate property tester |
| CN105910891A (en) * | 2016-06-17 | 2016-08-31 | 南京理工大学 | Testing device for damage concrete stress-strain whole curve caused by environment corrosion |
| CN109283064A (en) * | 2018-11-01 | 2019-01-29 | 云南科威液态金属谷研发有限公司 | High temperature and pressure test device and test method |
| CN111504794A (en) * | 2020-04-25 | 2020-08-07 | 天纺标(上海)检测科技有限公司 | Fabric bursting strength appearance |
| CN114184483A (en) * | 2021-11-11 | 2022-03-15 | 广东科鼎功能材料有限公司 | Temperature control device for detecting functional polymer material |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102878840A (en) * | 2012-09-29 | 2013-01-16 | 中国航天空气动力技术研究院 | Non-oxidation split charging device and non-oxidation split charging method for manufacturing alkali-metal high-temperature heat tubes |
| CN103056215A (en) * | 2012-12-27 | 2013-04-24 | 北京航空航天大学 | Warm/hot medium hydro-forming device for sheets |
| CN103056215B (en) * | 2012-12-27 | 2014-09-17 | 北京航空航天大学 | Warm/hot medium hydro-forming device for sheets |
| CN104280294A (en) * | 2014-10-15 | 2015-01-14 | 北京航空航天大学 | Dynamic temperature measuring device in high-temperature breaking strength tensile test |
| CN104849142A (en) * | 2015-05-18 | 2015-08-19 | 北京航空航天大学 | Multidirectional loading universal metal plate property tester |
| CN105910891A (en) * | 2016-06-17 | 2016-08-31 | 南京理工大学 | Testing device for damage concrete stress-strain whole curve caused by environment corrosion |
| CN109283064A (en) * | 2018-11-01 | 2019-01-29 | 云南科威液态金属谷研发有限公司 | High temperature and pressure test device and test method |
| CN109283064B (en) * | 2018-11-01 | 2024-01-09 | 云南科威液态金属谷研发有限公司 | High-temperature high-pressure test device and test method |
| CN111504794A (en) * | 2020-04-25 | 2020-08-07 | 天纺标(上海)检测科技有限公司 | Fabric bursting strength appearance |
| CN114184483A (en) * | 2021-11-11 | 2022-03-15 | 广东科鼎功能材料有限公司 | Temperature control device for detecting functional polymer material |
| CN114184483B (en) * | 2021-11-11 | 2023-10-24 | 广东科鼎功能材料有限公司 | Temperature control device for detecting functional polymer material |
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Application publication date: 20110907 |