CN114577631A - Elasticity test device for bending rigidity and fatigue strength of aluminum alloy structural part - Google Patents
Elasticity test device for bending rigidity and fatigue strength of aluminum alloy structural part Download PDFInfo
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- CN114577631A CN114577631A CN202210244717.5A CN202210244717A CN114577631A CN 114577631 A CN114577631 A CN 114577631A CN 202210244717 A CN202210244717 A CN 202210244717A CN 114577631 A CN114577631 A CN 114577631A
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- 238000012360 testing method Methods 0.000 title claims abstract description 38
- 238000005452 bending Methods 0.000 title claims abstract description 37
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 26
- 230000007246 mechanism Effects 0.000 claims description 20
- 238000006073 displacement reaction Methods 0.000 claims description 16
- 238000007667 floating Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 abstract description 11
- 230000008569 process Effects 0.000 abstract description 11
- 230000033001 locomotion Effects 0.000 abstract description 9
- 238000013001 point bending Methods 0.000 abstract description 4
- 230000005489 elastic deformation Effects 0.000 abstract description 2
- 238000011160 research Methods 0.000 abstract description 2
- 238000012937 correction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
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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
- G01N3/20—Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
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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
- G01N3/02—Details
- G01N3/04—Chucks
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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
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
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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
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/36—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by pneumatic or hydraulic means
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Abstract
The elastic test device for the bending rigidity and the fatigue strength of the aluminum alloy structural member comprises a mechanical force load applying unit, a structural member clamping and swinging unit and a swing arm supporting and guiding unit which are arranged on a base, wherein a set of structural member clamping and swinging unit is respectively arranged on two sides of the mechanical force load applying unit, and the structural member clamping and swinging unit is connected with the swing arm supporting and guiding unit. The structure clamping and swinging unit clamps the auxiliary structures on two sides of the structure to perform three-point bending motion. The invention ensures the uniqueness and symmetry of the stress position of the structural member in the load application process, realizes the repeated mechanical force load application and release work on the stress position of the structural member, realizes the elastic test work on the bending rigidity and fatigue strength of the aluminum alloy structural member by analyzing the mechanical force load value-bending deformation of the structural member, and provides basic data support for the service performance research of the structural member in the elastic deformation stage.
Description
Technical Field
The invention relates to an elasticity test device for testing bending rigidity and fatigue strength of an aluminum alloy beam structure, and belongs to the technical field of elasticity test of structural parts.
Background
The aluminum alloy aviation structural part is generally formed by integrally milling a pre-stretched plate, and has the characteristics of large size, thin wall thickness, low rigidity and the like. In the machining process, a large amount of blank materials are removed, and the structural part is subjected to the coupling action of factors such as blank stress, machining stress, mechanical load, temperature load and the like, so that the internal states of the workpiece, such as residual stress, microstructure and the like, become complicated. In addition, the structural part generally has the problems of deformation out-of-tolerance caused by machining deformation and influence on the assembly problem of the workpiece, and the deformation correction needs to be carried out by adopting post-treatment processes such as rolling correction, pressure correction and the like, so that the complexity of the internal stress and the microstructure state of the workpiece is further increased.
The stability of the structural member is affected by the change of the internal state of the structural member, and the bending rigidity and fatigue strength of the whole structural member are affected by the change of the internal stress and the microstructure of the structural member. In the service process of the aviation equipment, the aluminum alloy structural part is subjected to various load effects such as mechanical force, temperature, vibration and the like, the service environment is complex and variable, and the bending rigidity and the fatigue strength of the structural part are important influence factors related to the flight safety and the flight service life of the aviation equipment.
In order to more effectively analyze the service performance of the aluminum alloy structural member, a high-precision special device is required to accurately test the bending rigidity and the fatigue strength of the aluminum alloy structural member. However, there is no such means for accurate testing.
Disclosure of Invention
Aiming at the defects of the prior art for testing the bending rigidity and the fatigue strength of the aluminum alloy beam structure, the invention provides the elasticity test device for testing the bending rigidity and the fatigue strength of the aluminum alloy structure with high precision by combining the motion characteristic of performing three-point bending test on a workpiece by mechanical force external load.
The elasticity test device for the bending rigidity and the fatigue strength of the aluminum alloy structural part adopts the following technical scheme:
the elasticity test device comprises a control unit, and a mechanical force load applying unit, a structural member clamping and swinging unit and a swing arm supporting and guiding unit which are arranged on a base, wherein two sides of the mechanical force load applying unit are respectively provided with a set of structural member clamping and swinging unit, and the structural member clamping and swinging unit is connected with the swing arm supporting and guiding unit; the mechanical force load applying unit is internally provided with a power mechanism, a tension and pressure sensor and a displacement sensor, and the structural member clamping and swinging unit is internally provided with an angle sensor; the control unit comprises an upper computer and an I/O module, wherein the upper computer is connected with the power mechanism, the tension and pressure sensor, the displacement sensor and the angle sensor through the I/O module.
The mechanical force load applying unit comprises a push-pull main body and a power mechanism, the push-pull main body is connected with the power mechanism, the power mechanism is installed on the base, and a push-pull accessory is arranged at the front end of the push-pull main body. The power mechanism adopts a double-acting air cylinder, two air nozzles of the double-acting air cylinder are connected with two output ends of a three-position five-way electromagnetic valve, the input end of the three-position five-way electromagnetic valve is connected with the output end of an electric proportional valve, a wiring end of the three-position five-way electromagnetic valve is connected with an I/O module through a relay, the input end of the electric proportional valve is connected with an air source, and the wiring end of the electric proportional valve is connected with the I/O module. The push-pull body is connected with the power mechanism through the floating joint, the pull pressure sensor is connected between the push-pull body and the power mechanism and connected with the floating joint, and the floating joint is installed on the power mechanism. The tension and pressure sensor is connected with the I/O module through a tension and pressure sensor transmitter, and the I/O module is connected with the upper computer. The output end of the push-pull main body or the power mechanism is connected with a displacement sensor through a connecting rod, and the displacement sensor is installed on the base.
The structure centre gripping swing unit, including swing arm, front axle and rear axle, the front end of swing arm has the splint through the front axle is articulated, is provided with the clamp splice on the splint (be used for with structure length direction's tip fastening on splint), and the rear end of swing arm is installed on the rear axle, and the rear axle is directly or through the axle bed install on the base. An angle sensor is connected between the swing arm and the rear shaft.
Swing arm supports guide unit, including bottom plate, slide rail, slip table, guide holder, direction piece, support frame and gyro wheel, the bed plate is installed on the base, installs the slide rail on the bottom plate, installs the slip table on the slide rail, installs the guide holder on the slip table, and the both sides of guide holder are articulated with a guide piece respectively, and the other end of guide piece is articulated with the slider that sets up in structure centre gripping swing unit (specifically the swing arm). The slider comprises leading truck and support frame, and the support frame is installed on the leading truck, the leading truck through the round pin axle with the guide plate is articulated, connect on the support frame and ride on the horse card (through the bolt fastening), form the spout of connection on structure centre gripping swing unit, the gyro wheel is installed to the bottom of support frame, the bottom of gyro wheel with the bottom plate contact.
During testing, the two ends of the structural part are clamped on the two groups of structural part clamping and swinging units, and the middle part of the structural part is connected with the mechanical force load applying unit. The middle position of the structural part is repeatedly bent under the action of a load applied by a mechanical force load applying unit, the applied load force is monitored by pulling a pressure sensor, an angle sensor measures the swing angle of the structural part clamping and swinging unit in real time, the clamping and three-point bending motion effects of the structural part clamping and swinging unit on the structural part in the operation process of the elasticity test device are realized, and the swing arm supporting and guiding units ensure the swing amplitude consistency of swing arm structures on two sides of the structural part clamping and swinging unit and play a role in supporting the swing arms. The signals of the tension and pressure sensor are received and converted and then transmitted to the upper computer through the I/O module, the I/O module simultaneously transmits structural part bending data measured by the displacement sensor and the angle sensor to the upper computer, the mechanical force load and the bending data applied to the structural part by the upper computer are processed, and bending rigidity and fatigue strength data are obtained.
The invention ensures the uniqueness and symmetry of the stress position of the structural member in the load application process, realizes the repeated mechanical force load application and release work on the stress position of the structural member, and realizes the elastic test work on the bending rigidity and fatigue strength of the aluminum alloy structural member by analyzing the mechanical force load value-bending deformation of the structural member. The device can meet the requirement of testing the bending rigidity and the fatigue strength of the aluminum alloy beam structural parts, and provides basic data support for the service performance research of the structural parts in the elastic deformation stage.
Drawings
FIG. 1 is a schematic view of the whole of the mechanical structure of the elasticity tester of the present invention.
Fig. 2 is a schematic structural view of a mechanical force load applying unit of the present invention.
Fig. 3 is a schematic view of the overall structure of the structure holding swing unit of the present invention.
Fig. 4 is an exploded view of the structure-holding swing unit of the present invention.
Fig. 5 is a schematic view of the overall structure of the swing arm support guide unit of the present invention.
Fig. 6 is an exploded view of the swing arm support guide unit of the present invention.
FIG. 7 is a schematic view showing the control principle of the elasticity testing apparatus of the present invention.
In the figure: 00. the base, 01, the mechanical force load applying unit, 02, the structural member clamps the swing unit, 03, the swing arm supports the guide unit;
1. pushing and pulling accessories; 2. a push-pull body; 3. a pull pressure sensor; 4. a bolt and nut adapter; 5. a floating joint; 6. a cylinder; 7. a stud bolt; 8. a connecting rod; 9. a displacement sensor; 10. a sensor mount; 11. a cylinder mount; 12. a bearing end cap;
13. a clamping block; 14. a structural member; 15. a hard pad; 16. a splint; 17. a front axle; 18. swinging arms; 19. an angle sensor; 20. a front bearing; 21. a rear bearing; 22. a rear axle; 23. a bearing transparent cover; 24. a horizontal shaft seat;
25. a sliding table stop block; 26. a slide rail; 27. a sliding table; 28. a guide seat; 29. a guide piece; 30. riding a horse card; 31. a guide frame; 32. a pin shaft with a groove; 33. a pin shaft with a groove; 34. a support frame; 35. a roller; 36. a base plate;
37. an upper computer; 38. an air compressor; 39. an electric proportional valve; 40. a three-position five-way electromagnetic valve; 41. pulling the pressure sensor transmitter; 42. a relay; an I/O module.
Detailed Description
The elasticity test device for the bending rigidity and the fatigue strength of the aluminum alloy structural part comprises a mechanical force load applying unit 01, a structural part clamping and swinging unit 02 and a swinging arm supporting and guiding unit 03, wherein the mechanical force load applying unit 01 is arranged on a base 00 (see figure 1). The two groups of structure clamping and swinging units 02 are symmetrically arranged relative to the mechanical force load applying unit 01, and the two groups of structure clamping and swinging units 02 are connected with the swing arm supporting and guiding unit 03. During testing, the structural member 14 is clamped on the two groups of structural member clamping and swinging units 02, and the middle part of the structural member is connected with the mechanical force load applying unit 01.
The mechanical force load application unit is constructed as shown in fig. 1 and 2, and includes a push-pull body 2, a pull-pressure sensor 3, a floating joint 5, and a cylinder 6. The push-pull main body 2 is connected with the pull-press sensor 3 through the stud bolt 7, nuts are arranged at two ends of the stud bolt respectively to ensure the push-pull main body 2 and the pull-press sensor 3 to be fastened and installed, an upper push-pull accessory 1 and a lower push-pull accessory 1 are arranged at the front end of the push-pull main body 2, the structural member 14 is clamped on the push-pull main body 2 through the push-pull accessories 1 during testing, and the push-pull accessories 1 are connected onto the push-pull main body 2 through bolts. Draw pressure sensor 3 to be connected with unsteady joint 5 through bolt and nut adapter 4, unsteady joint 5 is installed on the pull rod (piston rod) of cylinder 6, and cylinder 6 passes through cylinder installed part 11 and installs on base 00. Still be connected with connecting rod 8 on the bolt and nut adapter 4, be connected with displacement sensor 9 through connecting rod 8, displacement sensor 9 passes through sensor installed part 10 and installs on base 00 and its installation direction is parallel with slide rail 26.
The cylinder 6 is a standard double-acting cylinder, the front and rear air nozzles of the cylinder are respectively connected to two output ends of a three-position five-way electromagnetic valve 40 through air pipes, the air dispersing end of the three-position five-way electromagnetic valve 40 is respectively connected with a silencer, the input end of the three-position five-way electromagnetic valve 40 is connected to the output end of an electric proportional valve 39 through an air pipe, the input end of the electric proportional valve 39 is connected with an air compressor 38 through an air pipe, and the air compressor 38 provides an air source. The telescopic motion of the cylinder rod of the cylinder 6 is controlled by the pressure regulation of the electric proportional valve 39 and the reversing of the three-position five-way electromagnetic valve 40, the displacement sensor 9 moves along with the cylinder 6 through the connecting rod 8, the bending deflection of the structural member 14 is measured in real time, and the mechanical force load applying work of the mechanical force load applying unit on the structural member 14 is realized.
The structure clamping and swinging units are divided into two groups and symmetrically arranged on two sides of a middle line at the front end of the base 00, and the structure of each group of structure clamping and swinging units is shown in fig. 3 and 4 and comprises a swinging arm 18, a front shaft 17, a rear shaft 22, a horizontal shaft seat 24 and an angle sensor 19. The front end of the swing arm 18 is connected (hinged) with a clamping plate 16, the clamping plate 16 is connected with the front end of the swing arm 18 through a front bearing 20 and a front shaft 17 (see fig. 4), and the front shaft 17 limits the axial movement of the shaft through a shaft step and a clamping spring at the end part. The clamping plate 16 is provided with an upper clamping block 13 and a lower clamping block 13, one end of the structural part 14 in the length direction is fastened on the clamping plate 16 through two clamping blocks 13 through bolts, the structural part 14 is located between the clamping blocks 13 and the clamping plate 16, and the contact surfaces between the clamping blocks 13 and the structural part 14 and between the clamping plate 16 and the structural part 14 are protected by hard gaskets 15 (see fig. 1). The rear end of swing arm 18 is installed with rear shaft 22 through rear bearing 21, rear shaft 22 is connected to horizontal shaft seat 24, and horizontal shaft seat 24 is installed on base 00. Bearing end covers 12 are arranged on the rear shaft 22 of the group of structural member clamping swing unit and at the upper end and the lower end of the rear bearing 21 for protection. And bearing transparent covers 23 are arranged on the upper end and the lower end of a rear bearing 21 on a rear shaft 22 of the other group of structural member clamping swing unit for protection, and a measuring shaft of the angle sensor 19 is connected to the rear shaft 22 through the bearing transparent cover at the upper end (see fig. 4). In the operation process of the elasticity test device, two ends of the structural part 14 in the length direction are respectively clamped between the clamping blocks 13 and the clamping plates 16 of the two groups of structural part clamping and swinging units, the middle position of the structural part 14 is repeatedly bent under the action of applied load, the clamping blocks 13 and the clamping plates 16 move along with the structural part 14 in a bending and swinging mode under the assistance of the front bearing 20, the swinging arm 18 and the rear bearing 21, the angle sensor 19 measures the swinging angle of the swinging arm 18 in real time, and the clamping of the structural part clamping and swinging units on the structural part 14 and the maintenance of the three-point bending movement state in the operation process of the elasticity test device are realized.
The swing arm support guide unit guides the two swing arms 18 in the structure-holding swing unit. As shown in fig. 5 and 6, the swing arm support guide unit includes a base plate 36, a slide rail 26, a slide table 27, a guide holder 28, a guide piece 29, a support bracket 34, and a roller 35. The bottom plate 36 passes through the fix with screw at the front end of base 00, slide rail 26 passes through the central line position of fix with screw at bottom plate 36, install slip table 27 on the slide rail 26, the both ends of slip table 27 all are provided with a slip table dog 25 (slip table dog 25 also can fixed mounting on slide rail 26), install guide holder 28 on the slip table 27, a direction piece 29 is connected through grooved pin axle 32 respectively to the both sides of guide holder 28, the other end of guide piece 29 is connected with leading truck 31 through grooved pin axle, leading truck 31 passes through bolt fixed mounting on support frame 34, the upper end of support frame 34 is through riding on horse-riding card 30 and two swing arms 18 of bolt difference fixed mounting in structure centre gripping swing unit. The bottom of the support bracket 34 is provided with a roller 35 through a grooved pin 33, and the bottom end of the roller 35 contacts a bottom plate 36. The ends of the grooved pin 32 and the grooved pin 33 are provided with snap springs to prevent axial movement. In the operation process of the elasticity test device, the bottom end of a support frame 34 which is matched with the horsecard 30 and is arranged on the swing arm 18 is contacted on a bottom plate 36 through a roller 35, and the existence of the roller 35 ensures that the swing arm 18 does not generate additional friction force in the swing process, thereby playing the role of undamped support for the two swing arms 18. The two swing arms 18 are connected with the sliding table 27 through the guide frame 31, the guide piece 29 and the guide seat 28, and the slide rail 26 matched with the sliding table 27 is positioned on a middle symmetrical line of the two swing arms 18, so that the swing amplitude consistency of the two swing arms 18 in the swing process is ensured, and the guide effect of the swing arms 18 is realized.
The invention installs the slide rail 26 and the cylinder 6 on the front and back end positions of the middle line of the base 00, ensures the consistency of swing amplitudes of the swing arms on both sides by combining the swing arms 18 with the slide rail sliding table structure, and ensures the uniqueness and symmetry of the stress position of the structural part in the process of applying load. The adoption of the pneumatic structure (the air cylinder 6) realizes the repeated application and release of mechanical force load on the stressed position of the structural member.
As shown in fig. 7, the control system of the elasticity testing apparatus includes an upper computer 37, an I/O module (input/output module) 43, a relay 42, and a tension/pressure sensor transmitter 41. The upper computer 37 is respectively connected with an electric proportional valve 39, a displacement sensor 9, an angle sensor 19, a relay 42 and a pulling pressure sensor transmitter 41 through an I/O module 43, the relay 42 is connected with a three-position five-way electromagnetic valve 40, and the pulling pressure sensor transmitter 41 is connected with a pulling pressure sensor 3 in a mechanical force load applying unit.
The air compressor 38 continuously provides air source power for the three-position five-way electromagnetic valve 40 through the electric proportional valve 39, and under the operation of the upper computer 37, the I/O module 43 adjusts the air source pressure through controlling the electric proportional valve 39, so that the control of the load application value of the structural member 14 by the air cylinder 6 in the mechanical force load application unit is realized. The I/O module 43 adjusts the direction of the air source entering the air cylinder 6 by controlling the three-position five-way solenoid valve 40 connected through the relay 42, so as to control the telescopic movement rate and the movement time of the rod of the air cylinder 6 in the mechanical force load applying unit. The tension and pressure sensor transmitter 41 receives and converts signals of the tension and pressure sensor 3 in the mechanical force load applying unit and then transmits the signals to the upper computer 37 through the I/O module 43, the I/O module 43 simultaneously transmits bending data of the structural member 14 measured by the displacement sensor 9 and the angle sensor 19 to the upper computer 37, processing of the mechanical force load and the bending data applied to the structural member 14 by the upper computer 37 is achieved, and bending rigidity and fatigue strength data are obtained.
The displacement sensor 9 and the angle sensor 19 are used for realizing the real-time acquisition of bending deformation data of the structural member 14, and the elasticity test work of the bending rigidity and the fatigue strength of the aluminum alloy structural member 14 is realized by matching with the actual structural member load application value data measured by the tension and pressure sensor 3 and analyzing the mechanical force load value-bending deformation of the structural member through the upper computer 37.
Claims (10)
1. The utility model provides an aluminum alloy structure bending rigidity and fatigue strength's elasticity test device which characterized by: the mechanical force loading device comprises a control unit, a mechanical force loading applying unit, a structural member clamping and swinging unit and a swing arm supporting and guiding unit, wherein the mechanical force loading applying unit, the structural member clamping and swinging unit and the swing arm supporting and guiding unit are arranged on a base; the mechanical force load applying unit is internally provided with a power mechanism, a tension and pressure sensor and a displacement sensor, and the structural member clamping and swinging unit is internally provided with an angle sensor; the control unit comprises an upper computer and an I/O module, wherein the upper computer is connected with the power mechanism, the tension and pressure sensor, the displacement sensor and the angle sensor through the I/O module.
2. The aluminum alloy structural member bending rigidity and fatigue strength elasticity test apparatus as set forth in claim 1, wherein: the mechanical force load applying unit comprises a push-pull body and a power mechanism, the push-pull body is connected with the power mechanism, the power mechanism is installed on the base, and a push-pull accessory is arranged at the front end of the push-pull body.
3. The elasticity test device for bending rigidity and fatigue strength of an aluminum alloy structural member according to claim 1 or 2, wherein: the power mechanism adopts a double-acting air cylinder, two air nozzles of the double-acting air cylinder are connected with two output ends of a three-position five-way electromagnetic valve, the input end of the three-position five-way electromagnetic valve is connected with the output end of an electric proportional valve, a wiring end of the three-position five-way electromagnetic valve is connected with an I/O module through a relay, the input end of the electric proportional valve is connected with an air source, and the wiring end of the electric proportional valve is connected with the I/O module.
4. The aluminum alloy structural member bending rigidity and fatigue strength elasticity test apparatus as set forth in claim 2, wherein: the push-pull body is connected with the power mechanism through the floating joint, the pull pressure sensor is connected between the push-pull body and the power mechanism and connected with the floating joint, and the floating joint is installed on the power mechanism.
5. The elasticity test device for bending rigidity and fatigue strength of an aluminum alloy structural member according to claim 1 or 4, wherein: the tension and pressure sensor is connected with the I/O module through a tension and pressure sensor transmitter, and the I/O module is connected with the upper computer.
6. The aluminum alloy structural member bending rigidity and fatigue strength elasticity test apparatus as set forth in claim 2, wherein: the output end of the push-pull main body or the power mechanism is connected with a displacement sensor through a connecting rod, and the displacement sensor is installed on the base.
7. The elasticity test device for bending rigidity and fatigue strength of an aluminum alloy structural member as recited in claim 1, wherein: the structure clamping and swinging unit comprises a swinging arm, a front shaft and a rear shaft, wherein the front end of the swinging arm is hinged with a clamping plate through the front shaft, a clamping block is arranged on the clamping plate, the rear end of the swinging arm is arranged on the rear shaft, and the rear shaft is directly or through a shaft seat arranged on the base.
8. The device for testing the bending rigidity and fatigue strength of an aluminum alloy structural member according to claim 7, wherein: an angle sensor is connected between the swing arm and the rear shaft.
9. The aluminum alloy structural member bending rigidity and fatigue strength elasticity test apparatus as set forth in claim 1, wherein: swing arm supports guide unit, including bottom plate, slide rail, slip table, guide holder, direction piece, support frame and gyro wheel, the bed plate is installed on the base, installs the slide rail on the bottom plate, installs the slip table on the slide rail, installs the guide holder on the slip table, and the both sides of guide holder are articulated with a guide piece respectively, and the other end of guide piece is articulated with the slider that sets up in structure centre gripping swing unit.
10. The aluminum alloy structural member bending rigidity and fatigue strength elasticity test apparatus as set forth in claim 9, wherein: the slider comprises leading truck and support frame, and the support frame is installed on the leading truck, the leading truck through the round pin axle with the guide plate is articulated, connects on the support frame and rides the horse card, forms the spout of connection on structure centre gripping swing unit, the gyro wheel is installed to the bottom of support frame, the bottom of gyro wheel with the bottom plate contact.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210244717.5A CN114577631A (en) | 2022-03-11 | 2022-03-11 | Elasticity test device for bending rigidity and fatigue strength of aluminum alloy structural part |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210244717.5A CN114577631A (en) | 2022-03-11 | 2022-03-11 | Elasticity test device for bending rigidity and fatigue strength of aluminum alloy structural part |
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