CN111855469B - Temperature cycle fatigue testing device - Google Patents
Temperature cycle fatigue testing device Download PDFInfo
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- CN111855469B CN111855469B CN202010767430.1A CN202010767430A CN111855469B CN 111855469 B CN111855469 B CN 111855469B CN 202010767430 A CN202010767430 A CN 202010767430A CN 111855469 B CN111855469 B CN 111855469B
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- 238000009661 fatigue test Methods 0.000 title claims abstract description 32
- 238000012360 testing method Methods 0.000 claims abstract description 68
- 238000010438 heat treatment Methods 0.000 claims abstract description 19
- 238000001816 cooling Methods 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims description 9
- 239000000110 cooling liquid Substances 0.000 claims description 8
- 125000004122 cyclic group Chemical group 0.000 claims description 8
- 238000002474 experimental method Methods 0.000 claims description 6
- 238000005057 refrigeration Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 20
- 239000002131 composite material Substances 0.000 abstract description 7
- 238000012545 processing Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000011160 research Methods 0.000 abstract description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 230000035882 stress Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/60—Investigating resistance of materials, e.g. refractory materials, to rapid heat changes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/18—Performing tests at high or low temperatures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0005—Repeated or cyclic
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/005—Electromagnetic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0073—Fatigue
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0222—Temperature
- G01N2203/0224—Thermal cycling
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- Life Sciences & Earth Sciences (AREA)
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- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
A temperature control cycle fatigue testing device. The device comprises a double-freedom-degree actuating platform, an upper computer, a compressor cooling system and a test frame; the invention has the following effects: the test device can be used for rapidly and repeatedly heating and cooling materials under different mechanical loads, and has the characteristics of simple structure, low energy consumption, rapid and autonomous heating and cooling, rapid test piece replacement, high-cycle or ultra-high-cycle test and the like. The method can realize temperature cycle fatigue test and data processing of the material under different stress amplitudes, can be used for carrying out fatigue test of the novel composite material for aviation and the temperature sensitive material under the temperature cycle effect and the prediction function of the material on the temperature cycle fatigue life, and provides theoretical guidance and technical support for the research of the temperature cycle fatigue problem of the novel intelligent composite material. The method can realize temperature cycle fatigue test and data processing of the material under different stress amplitudes, and can be used for carrying out fatigue test of novel composite materials and temperature sensitive materials under the action of temperature cycle.
Description
Technical Field
The invention belongs to the technical field of material temperature fatigue test equipment, and particularly relates to a temperature control cycle fatigue test device capable of rapidly increasing and decreasing temperature and automatically carrying out high-cycle or ultra-high-cycle tests.
Background
It is known that fatigue failure of structural members of aircraft and the like have a significant role in safety of a civil aircraft. Damage and damage to components can occur gradually under the influence of stress, environmental and other factors, one of the major forms of damage being fatigue damage. The generation, expansion and accumulation of fatigue damage can accelerate the aging of materials, which results in serious degradation of the material performance, reduction of rigidity and strength, and greatly reduced service life. The temperature cycle fatigue relates to a plurality of fields such as jet engine blades, temperature control switches, medical brackets and the like, and along with the continuous development of novel intelligent composite materials, the requirements on the temperature fatigue performance of the materials are higher and higher. For mechanical cycle fatigue test instruments, students at home and abroad have conducted extensive and intensive studies, and for realizing a temperature field, the implementation of the temperature field is mainly focused on adding a temperature environment box on the mechanical cycle fatigue test machine, adopting a heating furnace to control high temperature, and adopting a liquid nitrogen injection system to control low temperature so as to realize mechanical fatigue tests under different temperature environments. However, the material is cooled naturally in the high temperature environment box, so that the temperature is reduced for a long time, and the test time is long, so that the temperature cycle fatigue test of the material is difficult to realize. Meanwhile, the conversion process of the material from the high-temperature environment box to the low-temperature liquid nitrogen injection system is slower, liquid nitrogen has a certain service time limit, needs to be replaced frequently and is fixed in storage amount, so that the high-temperature and low-temperature conversion of the material is difficult to realize.
Disclosure of Invention
In order to solve the above problems, an object of the present invention is to provide a temperature-controlled cyclic fatigue testing device.
In order to achieve the above problems, the temperature control cycle fatigue testing device provided by the invention comprises a double-freedom-degree actuating platform, an upper computer, a compressor cooling system and a test frame; wherein the test rack is a multi-layer cabinet body; the double-freedom-degree actuating platform is arranged in the middle layer of the test stand; the compressor cooling system is arranged at the lower layer of the test frame; the upper computer is arranged on the front end surface of the upper layer of the test frame and is electrically connected with the compressor cooling system and the electric control component on the double-freedom-degree actuating platform.
The upper computer adopts an STM32 singlechip.
The double-freedom-degree actuating platform comprises a rack, a supporting plate, a horizontal screw rod, a vertical screw rod, a Y-axis motor, a Z-axis motor, a pressure sensor, a sample pre-tightening motor, a cold end test environment groove, a hot end test environment groove, a temperature sensor, a quick replacement clamp, a cross beam and a clamp fixing plate; the rack is of a rectangular frame structure, and the outer part of the rack is arranged at the edge part of the test rack; the cold end experimental environment groove and the hot end experimental environment groove are arranged in the middle hole of the rack side by side, and the lower ends of the cold end experimental environment groove and the hot end experimental environment groove are respectively provided with a temperature sensor; the cold end test environment tank is filled with cooling liquid and is connected with a compressor cooling system through a pipeline so as to realize circulating refrigeration of the cooling liquid; a heating rod is arranged in the hot end experiment environment tank and is used for containing heating liquid; the support plate is horizontally arranged at the outer side of one end of the cold end experimental environment groove and one end of the hot end experimental environment groove and extends along the front-back direction; one end surface of the supporting plate is provided with a Y-axis motor, and the other end surface is provided with a screw rod seat; one end of the horizontal screw rod is connected with an output shaft of the Y-axis motor, and the other end of the horizontal screw rod is supported by a screw rod seat; the cross beam is arranged above the rack, the cold end test environment groove and the hot end test environment groove along the left-right direction, one end of the cross beam is connected to the middle part of the horizontal screw rod through the screw nut, and the other end of the cross beam is arranged on the side edge of the test rack in a sliding mode; the rear side surface of the Z-axis motor is fixed at a position between the rack and the supporting plate on the front end surface of the beam, and the output shaft is downwards connected with the upper end of the vertical screw rod at the outer end; the lower end of the vertical screw rod is supported by a screw rod seat; the fixture fixing plate is vertically arranged above the rack, the cold end test environment groove and the hot end test environment groove, is positioned at the front side of the cross beam and is parallel to the cross beam, one end of the fixture fixing plate is connected to the middle part of the vertical screw rod through the screw nut, and two fixture setting openings are formed in the middle of the lower end at intervals; the quick replacement clamp is arranged on the clamp fixing plate through two clamp setting openings, one end is a fixed end, and the other end is a movable end capable of moving left and right; the sample pre-tightening motor is arranged on one side of the back surface of the clamp fixing plate, the pressure sensor is arranged on the movable end of the quick replacement clamp, the output shaft of the sample pre-tightening motor points to the pressure sensor, and the pressure sensor can push the movable end of the quick replacement clamp; the Y-axis motor, the Z-axis motor, the pressure sensor, the sample pre-tightening motor, the temperature sensor and the heating rod are respectively and electrically connected with the upper computer.
The quick-change clamp comprises a fixed frame, a movable frame, two quick-change chucks and a slideway; wherein the rear end of the fixing frame is fixedly arranged in a fixture setting opening on the fixture fixing plate; the slideway is arranged on the back surface of the fixture fixing plate in a mode of extending along the left-right direction; the rear end of the movable frame is arranged on the slideway in a mode of being capable of moving left and right, and the rear part is positioned at the opening of the other clamp on the clamp fixing plate; the pressure sensor is connected to the side surface of the rear end of the movable frame and is positioned between the rear end of the movable frame and the sample pre-tightening motor; the inner side parts of the front surfaces of the fixed frame and the movable frame are respectively inwards provided with a chuck setting groove; the outer ends of the two quick-change chucks are respectively inserted into chuck setting grooves on the fixed frame and the movable frame, the inner ends of the two quick-change chucks are provided with a sample clamping opening, and the side surfaces of the sample clamping openings fix samples by jackscrews.
The Y-axis motor, the Z-axis motor and the sample pre-tightening motor are stepping motors.
The temperature control cycle fatigue testing device provided by the invention has the following beneficial effects:
the test device can be used for rapidly and repeatedly heating and cooling materials under different mechanical loads, and has the characteristics of simple structure, low energy consumption, rapid and autonomous heating and cooling, rapid test piece replacement, high-cycle or ultra-high-cycle test and the like. The method can realize temperature cycle fatigue test and data processing of the material under different stress amplitudes, can be used for carrying out fatigue test of the novel composite material for aviation and the temperature sensitive material under the temperature cycle effect and the prediction function of the material on the temperature cycle fatigue life, and provides theoretical guidance and technical support for the research of the temperature cycle fatigue problem of the novel intelligent composite material. The method can realize temperature cycle fatigue test and data processing of the material under different stress amplitudes, and can be used for carrying out fatigue test of novel composite materials and temperature sensitive materials under the action of temperature cycle.
Drawings
Fig. 1 is a perspective view of a temperature control cycle fatigue testing device provided by the invention.
Fig. 2 is a perspective view of a dual-degree-of-freedom actuating platform in the temperature control cycle fatigue testing device provided by the invention.
FIG. 3 is a right side view of the dual-degree-of-freedom actuation platform in the temperature-controlled cyclic fatigue testing device provided by the invention.
Fig. 4 is a perspective view of a dual-degree-of-freedom actuation platform in the temperature-controlled cyclic fatigue testing device provided by the invention when viewed from the back.
FIG. 5 is a top view of a dual-degree-of-freedom actuation platform in a temperature-controlled cyclic fatigue testing apparatus provided by the present invention.
Fig. 6 is a top view of a structure of a quick-change fixture in the temperature-control cycle fatigue testing device provided by the invention.
Fig. 7 is a perspective view of a structure of a quick-change clamp in the temperature-control cyclic fatigue testing device provided by the invention.
Detailed Description
The invention will now be described in detail with reference to the drawings and specific examples.
As shown in fig. 1 to 7, the temperature control cycle fatigue testing device provided by the invention comprises a double-freedom-degree actuating platform 1, an upper computer 2, a compressor cooling system 3 and a test stand 4; wherein the test rack 4 is a multi-layer cabinet body; the double-freedom-degree actuating platform 1 is arranged in the middle layer of the test stand 4; the compressor cooling system 3 is arranged at the lower layer of the test stand 4; the upper computer 2 is arranged on the front end surface of the upper layer of the test stand 4 and is electrically connected with the compressor cooling system 3 and the electric control component on the double-freedom-degree actuating platform 1.
The upper computer 2 adopts an STM32 singlechip.
The double-freedom-degree actuating platform 1 comprises a rack 5, a supporting plate 6, a horizontal screw rod 7, a vertical screw rod 8, a Y-axis motor 9, a Z-axis motor 10, a pressure sensor 11, a sample pre-tightening motor 12, a cold end test environment tank 13, a hot end test environment tank 14, a temperature sensor 15, a quick replacement clamp 16, a cross beam 17 and a clamp fixing plate 18; wherein the rack 5 is of a rectangular frame structure, and is externally erected at the edge part of the test rack 4; the cold end test environment groove 13 and the hot end test environment groove 14 are arranged in the middle hole of the rack 5 side by side, and the lower ends of the cold end test environment groove and the hot end test environment groove are respectively provided with a temperature sensor 15; the cold end test environment tank 13 is filled with cooling liquid and is connected with the compressor cooling system 3 through a pipeline so as to realize the circulation refrigeration of the cooling liquid; a heating rod is arranged in the hot end experiment environment tank 14 and is used for containing heating liquid; the support plate 6 is horizontally arranged outside one end of the cold end test environment groove 13 and one end of the hot end test environment groove 14 and extends along the front-back direction; one end surface of the supporting plate 6 is provided with a Y-axis motor 9, and the other end surface is provided with a screw rod seat; one end of the horizontal screw rod 7 is connected with an output shaft of the Y-axis motor 9, and the other end of the horizontal screw rod is supported by a screw rod seat; the cross beam 17 is arranged above the rack 5, the cold end test environment groove 13 and the hot end test environment groove 14 along the left-right direction, one end of the cross beam is connected with the middle part of the horizontal screw rod 7 through a screw nut, and the other end of the cross beam is arranged on the side edge of the test rack 4 in a sliding manner; the rear side surface of the Z-axis motor 10 is fixed at a position between the rack 5 and the supporting plate 6 on the front end surface of the cross beam 17, and the output shaft is downwards connected with the upper end of the vertical screw rod 8 at the outer end; the lower end of the vertical screw rod 8 is supported by a screw rod seat; the clamp fixing plate 18 is vertically arranged above the rack 5, the cold end test environment groove 13 and the hot end test environment groove 14, is positioned at the front side of the cross beam 17 and is parallel to the cross beam 17, one end of the clamp fixing plate is connected to the middle part of the vertical screw rod 8 through a screw nut, and two clamp setting openings are formed in the middle of the lower end at intervals; the quick change clamp 16 is mounted on the clamp fixing plate 18 through two clamp setting openings, one end of the quick change clamp is a fixed end, and the other end of the quick change clamp is a movable end capable of moving left and right; the sample pre-tightening motor 12 is arranged on one side of the back surface of the clamp fixing plate 18, the pressure sensor 11 is arranged on the movable end of the quick-change clamp 16, the output shaft of the sample pre-tightening motor 12 points to the pressure sensor 11, and the pressure sensor 11 can push the movable end of the quick-change clamp 16; the Y-axis motor 9, the Z-axis motor 10, the pressure sensor 11, the sample pre-tightening motor 12, the temperature sensor 15 and the heating rod are respectively and electrically connected with the upper computer 2.
The quick-change clamp 16 comprises a fixed frame 19, a movable frame 20, two quick-change chucks 21 and a slideway 23; wherein the rear end of the fixing frame 19 is fixedly arranged in a clamp setting opening on the clamp fixing plate 18; the slide 23 is provided on the back surface of the jig fixing plate 18 so as to extend in the left-right direction; the rear end of the movable frame 20 is arranged on the slideway 23 in a mode of being capable of moving left and right, and the rear part is positioned at the opening of the other clamp on the clamp fixing plate 18; the pressure sensor 11 is connected to the rear end side of the movable frame 20 and is positioned between the rear end of the movable frame 20 and the sample pre-tightening motor 12; the inner side parts of the front surfaces of the fixed frame 19 and the movable frame 20 are respectively inwards provided with a chuck setting groove; the outer ends of the two quick-change chucks 21 are respectively inserted into chuck setting grooves on the fixed frame 19 and the movable frame 20, the inner ends are provided with a specimen clamping opening, and the side surfaces of the specimen clamping opening fix the specimen 22 by using jackscrews.
The Y-axis motor 9, the Z-axis motor 10 and the sample pre-tightening motor 12 are stepping motors, the Y-axis motor 9 and the Z-axis motor 10 drive a screw rod to rotate, and the sample pre-tightening motor 12 drives an output shaft to linearly move.
The working principle of the temperature control cycle fatigue testing device provided by the invention is explained as follows:
when the fatigue performance test of the sample 22 under the temperature alternating load is required, firstly, an experimenter clamps two ends of the specially-shaped sample 22 in sample clamping ports of two quick-change chucks 21 respectively by using jackscrews, and then inserts the outer ends of the two quick-change chucks 21 into chuck setting grooves on a fixed frame 19 and a movable frame 20 respectively; starting the device, setting a pretightening force set value, cyclic loading times and a temperature set value on the upper computer 2, then starting the sample pretightening motor 12 under the control of the upper computer 2 to enable an output shaft on the sample pretightening motor to extend outwards, pushing the pressure sensor 11, pushing the movable frame 20 outwards along the slideway 23 by the pressure sensor 11 to pretighten the sample 22, detecting pretightening force data by the pressure sensor 11 and transmitting the pretightening force data to the upper computer 2, and stopping working of the sample pretightening motor 12 when the pretightening force set value is reached; simultaneously, the heating rod is electrified to heat the heating liquid in the hot end experiment environment tank 14; starting the compressor cooling system 3 to circulate the cooling liquid in the cold end test environment tank 13; the temperature data are collected by utilizing the two temperature sensors 15 and are transmitted to the upper computer 2, when the temperature set value is reached, the Y-axis motor 9 is started, the clamp fixing plate 18 and parts on the clamp fixing plate are driven to move to the position above the hot end experiment environment groove 14 by the horizontal lead screw 7 and the cross beam 17, then the Z-axis motor 10 is started, the clamp fixing plate 18 and parts on the clamp fixing plate are driven to move downwards by the vertical lead screw 8 until the test piece 22 is immersed in heating liquid in the hot end experiment environment groove 14, and the test piece 22 is heated by the heating liquid; after heating to the set temperature, under the control of the upper computer 2, the Z-axis motor 10 is started to enable the clamp fixing plate 18 and parts on the clamp fixing plate to move upwards to the position above the hot end experimental environment groove 14, then the Y-axis motor 9 is started to enable the clamp fixing plate 18 and parts on the clamp fixing plate to move to the position above the cold end experimental environment groove 13, and then the test piece 22 is immersed in cooling liquid in the cold end experimental environment groove 13 through the Z-axis motor 10 to be cooled, and the reciprocating circulation is performed in this way, so that the fatigue performance test of the test piece 22 under the temperature alternating load is completed.
Claims (3)
1. The temperature control cycle fatigue testing device comprises a double-freedom-degree actuating platform (1), an upper computer (2), a compressor cooling system (3) and a test frame (4); wherein the test rack (4) is a multi-layer cabinet body; the double-freedom-degree actuating platform (1) is arranged in the middle layer of the test stand (4); the compressor cooling system (3) is arranged at the lower layer of the test stand (4); the upper computer (2) is arranged on the front end surface of the upper layer of the test frame (4) and is electrically connected with the compressor cooling system (3) and the electric control component on the double-freedom-degree actuating platform (1);
the method is characterized in that: the double-freedom-degree actuating platform (1) comprises a bench (5), a supporting plate (6), a horizontal screw (7), a vertical screw (8), a Y-axis motor (9), a Z-axis motor (10), a pressure sensor (11), a sample pre-tightening motor (12), a cold end test environment groove (13), a hot end test environment groove (14), a temperature sensor (15), a quick replacement clamp (16), a cross beam (17) and a clamp fixing plate (18); the rack (5) is of a rectangular frame structure, and is externally erected at the edge part of the test rack (4); the cold end test environment groove (13) and the hot end test environment groove (14) are arranged in the middle hole of the rack (5) side by side, and the lower ends of the cold end test environment groove and the hot end test environment groove are respectively provided with a temperature sensor (15); the cold end test environment tank (13) is internally provided with cooling liquid and is connected with the compressor cooling system (3) through a pipeline so as to realize the circulation refrigeration of the cooling liquid; a heating rod is arranged in the hot end experiment environment tank (14) and is used for containing heating liquid; the supporting plate (6) is horizontally arranged at the outer sides of one ends of the cold end test environment groove (13) and the hot end test environment groove (14) and extends along the front-back direction; one end surface of the supporting plate (6) is provided with a Y-axis motor (9), and the other end surface is provided with a screw rod seat; one end of the horizontal screw rod (7) is connected with an output shaft of the Y-axis motor (9), and the other end of the horizontal screw rod is supported by a screw rod seat; the cross beam (17) is arranged above the rack (5), the cold end test environment groove (13) and the hot end test environment groove (14) along the left-right direction, one end of the cross beam is connected with the middle part of the horizontal screw (7) through a screw nut, and the other end of the cross beam is arranged on the side edge of the test rack (4) in a sliding mode; the rear side surface of the Z-axis motor (10) is fixed at a position between the rack (5) and the supporting plate (6) on the front end surface of the cross beam (17), and the output shaft is downward and the outer end is connected with the upper end of the vertical screw rod (8); the lower end of the vertical screw rod (8) is supported by a screw rod seat; the fixture fixing plate (18) is vertically arranged above the rack (5), the cold end test environment groove (13) and the hot end test environment groove (14), is positioned at the front side of the cross beam (17) and is parallel to the cross beam (17), one end of the fixture fixing plate is connected to the middle part of the vertical screw (8) through a screw nut, and two fixture setting openings are formed in the middle of the lower end at intervals; the quick replacement clamp (16) is arranged on the clamp fixing plate (18) through two clamp setting openings, one end is a fixed end, and the other end is a movable end capable of moving left and right; the sample pre-tightening motor (12) is arranged on one side of the back surface of the clamp fixing plate (18), the pressure sensor (11) is arranged on the movable end of the quick-change clamp (16), the output shaft of the sample pre-tightening motor (12) points to the pressure sensor (11), and the pressure sensor (11) can push the movable end of the quick-change clamp (16); the Y-axis motor (9), the Z-axis motor (10), the pressure sensor (11), the sample pre-tightening motor (12), the temperature sensor (15) and the heating rod are respectively and electrically connected with the upper computer (2).
2. The temperature-controlled cyclic fatigue testing device according to claim 1, wherein: the quick-change clamp (16) comprises a fixed frame (19), a movable frame (20), two quick-change chucks (21) and a slideway (23); wherein the rear end of the fixing frame (19) is fixedly arranged in a clamp setting opening on the clamp fixing plate (18); the slideway (23) is arranged on the back surface of the clamp fixing plate (18) in a mode of extending along the left-right direction; the rear end of the movable frame (20) is arranged on the slideway (23) in a mode of being capable of moving left and right, and the rear part is positioned at the opening of the other clamp on the clamp fixing plate (18); the pressure sensor (11) is connected to the side surface of the rear end of the movable frame (20) and is positioned between the rear end of the movable frame (20) and the sample pre-tightening motor (12); the inner side parts of the front surfaces of the fixed frame (19) and the movable frame (20) are respectively inwards provided with a chuck setting groove; the outer ends of the two quick-change chucks (21) are respectively inserted into chuck setting grooves on the fixed frame (19) and the movable frame (20), a sample clamping opening is formed in the inner end of the chuck setting grooves, and a sample (22) is fixed on the side surface of the sample clamping opening by using jackscrews.
3. The temperature-controlled cyclic fatigue testing device according to claim 1, wherein: the Y-axis motor (9), the Z-axis motor (10) and the sample pre-tightening motor (12) are stepping motors.
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| CN202010767430.1A CN111855469B (en) | 2020-08-03 | 2020-08-03 | Temperature cycle fatigue testing device |
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|---|---|---|---|
| CN202010767430.1A CN111855469B (en) | 2020-08-03 | 2020-08-03 | Temperature cycle fatigue testing device |
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| CN111855469B true CN111855469B (en) | 2023-05-05 |
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