Tensile strength detection device

Abstract

The utility model discloses a tensile strength detection device which comprises a thermal insulation cabinet and a refrigerating unit, a cabinet door is rotatably mounted at the top of the front side of the thermal insulation cabinet, a detection bin is arranged at the top of the inner side of the thermal insulation cabinet and located right behind the cabinet door, rails are arranged at the left end and the right end of the bottom of the inner side of the detection bin respectively, and a detection table is slidably mounted in the rails; according to the tensile strength detection device, the thermal insulation cabinet, the refrigerating unit, the detection bin, the air inlet pipe, the exhaust pipe, the electromagnetic valve and other parts are arranged, so that accurate control over the temperature in the detection bin is achieved, the low-temperature environment is simulated, and the detection precision is improved; by arranging the detection unit, accurate control and recording of a force value and a stroke in a composite material stretching process are realized, and the accuracy of a detection result is further improved; meanwhile, through the arrangement of the controller, automatic control over the whole detection process is achieved, and the detection efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of aircraft composite material detection, in particular to a tensile strength detection device. Background Art

[0002] With the rapid development of the aviation industry, aircraft composite materials have been widely used in the field of aircraft manufacturing due to their light weight, high strength and good corrosion resistance. In order to ensure the quality of aircraft composite materials, it is particularly important to perform accurate tensile strength testing on them.

[0003] At present, the tensile strength test of aircraft composite materials is often carried out at room temperature, which cannot simulate the low temperature conditions in the actual use environment well, resulting in deviations in the test results. In addition, the existing tensile strength testing devices often have single functions, and the stroke of the pressure end of the composite material and the applied pressure value cannot be accurately controlled and recorded, which leads to inaccurate test results. Therefore, we propose a tensile strength testing device. Utility Model Content

[0004] In view of the problems existing in the prior art, the utility model discloses a tensile strength testing device, which adopts the technical scheme of comprising a temperature-insulating cabinet and a refrigeration unit, wherein a cabinet door is rotatably installed on the front top of the temperature-insulating cabinet, a testing chamber is arranged on the inner top of the temperature-insulating cabinet, and the testing chamber is located directly behind the cabinet door, tracks are arranged on the left and right ends of the inner bottom of the testing chamber, a testing platform is slidably installed in the tracks, the testing platform is an inverted "U"-shaped structure, a through groove is arranged in the middle of the testing platform, a clamp assembly is arranged on the left and right ends of the through groove, and the clamp assemblies are respectively fixedly installed on the top of the testing platform, a testing unit is arranged directly above the through groove, the testing unit comprises a first L-shaped fixing plate, a motor, a driving shaft, a movable top pressure frame, a sliding rod and a force sensor, the driving shaft is rotatably installed on the top of the temperature-insulating cabinet through a tapered roller bearing, a threaded rod is welded on the bottom of the driving shaft, and a movable top pressure frame is threadedly installed on the threaded rod, A force sensor is fixedly installed at the bottom, and sliding rods are respectively slidably installed in the sliding holes arranged at the left and right ends of the movable top pressure frame, and the tops of the sliding rods are respectively fixedly connected to the inner tops of the detection bins, and a motor is arranged above the top of the driving shaft, and the motor is fixedly installed on the inner top of the first L-shaped fixing plate arranged at the top of the temperature insulation cabinet, and the output shaft of the motor is fixedly connected to the top of the driving shaft; an air pipe connecting bin is arranged at the inner bottom of the temperature insulation cabinet, and an air inlet pipe and an exhaust pipe are respectively arranged at the left and right ends of the air pipe connecting bin, one end of the air inlet pipe is connected to the cold air exhaust pipe of the refrigeration unit arranged in front of the right end of the temperature insulation cabinet, and the other end of the air inlet pipe is provided with a connecting pipe, and the other end of the connecting pipe is communicated with the inner top of the detection bin, a temperature sensor is fixedly installed on the inner left top of the detection bin, one end of the exhaust pipe is communicated with the inner bottom of the detection bin, and the other end of the exhaust pipe is penetrated and arranged on the outside of the temperature insulation cabinet, and solenoid valves are respectively arranged in the middle of the air inlet pipe and the exhaust pipe.

[0005] As a preferred technical solution of the utility model, wheel grooves are respectively provided at the left and right ends of the bottom of the testing platform, pulleys are rotatably installed at the front and rear ends of the wheel grooves, and a handle is welded in the middle of the front side of the testing platform. By providing wheel grooves at the left and right ends of the bottom of the testing platform and rotatably installing pulleys in the wheel grooves, the testing platform can be easily slid out of and pushed into the testing chamber, thereby improving the convenience of operation. At the same time, a handle is provided in the middle of the front side of the testing platform, so that the operator can push the testing platform more conveniently and labor-savingly.

[0006] As a preferred technical solution of the utility model, the clamp assembly includes a second L-shaped fixing plate, an electric telescopic rod and a pressing plate, two second L-shaped fixing plates are provided, and the second L-shaped fixing plates are respectively symmetrically arranged on the top of the test bench, and the top of the second L-shaped fixing plate is respectively fixedly installed with an electric telescopic rod, and the telescopic ends of the electric telescopic rod are respectively fixedly installed with a pressing plate. The setting of the second L-shaped fixing plate enables the electric telescopic rod and the pressing plate to be stably fixed on the top of the test bench, and the symmetrical setting ensures that the composite material is uniformly stressed when fixed, and the telescopic function of the electric telescopic rod enables the pressing plate to flexibly adjust its position to adapt to composite materials of different sizes.

[0007] As a preferred technical solution of the utility model, the detection unit also includes a first gear, a second gear and an encoder. The encoder, the first gear is welded and arranged at the connection between the output shaft of the motor and the drive shaft, the encoder is fixedly installed at one end of the top of the temperature-insulating cabinet, and the second gear is fixedly installed at the end of the input shaft of the encoder, and the second gear is meshed with the teeth on the first gear. The second gear of the encoder input shaft is meshed with the teeth of the first gear, and the number of rotations of the second gear can be recorded in real time, and the moving stroke of the mobile top pressure frame can be obtained by calculation. This design improves the accuracy and reliability of the detection data and provides accurate data support for subsequent data analysis and processing.

[0008] As a preferred technical solution of the utility model, the detection table is made of magnetic metal, and the rear side of the detection table is magnetically connected to the electromagnet plate arranged at the rear bottom of the detection chamber. During the detection process, the electromagnet plate is activated by the controller to generate magnetic adsorption force on the detection table, ensuring that the detection table will not move or shake when subjected to tensile force.

[0009] As a preferred technical solution of the utility model, it also includes a controller, which is arranged at the front end of the top right side of the temperature-insulating cabinet, and the output end of the controller is electrically connected to the input end of the motor, refrigeration unit, electromagnet plate and solenoid valve, and the input end of the controller is electrically connected to the output end of the encoder, force sensor, temperature sensor and external power supply. The controller is the "brain" of the entire device, responsible for receiving and processing the signals of the encoder, force sensor and temperature sensor, controlling the work of the motor, refrigeration unit, electromagnet plate and solenoid valve. Through the controller, the user can set the test parameters, start and stop the test, and obtain the test results.

[0010] The beneficial effects of the utility model are as follows: the utility model realizes precise control of the internal temperature of the detection chamber by arranging components such as a temperature-insulating cabinet, a refrigeration unit, a detection chamber, an air inlet pipe, an exhaust pipe and a solenoid valve, simulates a low-temperature environment, and improves the detection accuracy; by arranging a detection unit, precise control and recording of the force value and stroke during the stretching process of the composite material are realized, and the accuracy of the detection result is further improved; at the same time, through the setting of the controller, automatic control of the entire detection process is realized, and the detection efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0012] Figure 2 This is a rear view structural diagram of the utility model;

[0013] Figure 3 This is a schematic diagram of the cross-sectional structure of the utility model;

[0014] Figure 4 This is a schematic diagram of the structure of the testing platform of the utility model;

[0015] Figure 5 It is a schematic diagram of the partial cross-section structure of the utility model.

[0016] In the figure: 1 is a temperature-insulating cabinet, 2 a detection chamber, 3 a controller, 4 a gas pipe connecting chamber, 5 a detection unit, 51 a first L-shaped fixing plate, 52 a motor, 53 a first gear, 54 a driving shaft, 55 a movable top pressure frame, 56 a sliding rod, 57 a second gear, 58 an encoder, 59 a force sensor, 6 a cabinet door, 7 an air inlet pipe, 8 an exhaust pipe, 9 a refrigeration unit, 10 a connecting pipe, 11 a track, 12 a detection table, 13 an electromagnetic iron plate, 14 a through groove, 15 a second L-shaped fixing plate, 16 an electric telescopic rod, 17 a pressing plate, 18 a solenoid valve, 19 a wheel groove, 20 a pulley, and 21 a temperature sensor. DETAILED DESCRIPTION

[0017] Example 1

[0018] like Figures 1 to 5As shown, the utility model discloses a tensile strength testing device, which adopts the technical scheme of comprising a temperature-insulating cabinet 1 and a refrigeration unit 9, wherein a cabinet door 6 is rotatably installed on the front top of the temperature-insulating cabinet 1, a testing chamber 2 is arranged on the inner top of the temperature-insulating cabinet 1, and the testing chamber 2 is located directly behind the cabinet door 6, tracks 11 are arranged on the left and right ends of the inner bottom of the testing chamber 2, a testing platform 12 is slidably installed in the track 11, the testing platform 12 is an inverted "U"-shaped structure, a through groove 14 is arranged in the middle of the testing platform 12, wheel grooves 19 are arranged on the left and right ends of the bottom of the testing platform 12, pulleys 20 are rotatably installed on the front and rear ends of the wheel grooves 19, a handle is welded on the front middle of the testing platform 12, and the design of the handle facilitates the operator to move the testing platform 12 from the testing chamber to the testing chamber 2 is pulled out or pushed in, the detection table 12 is made of magnetic metal material, and the rear side of the detection table 12 is magnetically connected to the electromagnet plate 13 arranged at the bottom of the rear side of the detection chamber 2. Since the detection table 12 is made of magnetic metal material, the electromagnet plate 13 can be magnetically connected to the detection table 12, so as to fix it. The left and right ends of the through slot 14 are respectively provided with clamp assemblies, and the clamp assemblies are respectively fixedly installed on the top of the detection table 12. The clamp assemblies include a second L-shaped fixing plate 15, an electric telescopic rod 16 and a pressing plate 17. The second L-shaped fixing plates 15 are provided with two, and the second L-shaped fixing plates 15 are respectively symmetrically arranged on the top of the detection table 12. The top of the second L-shaped fixing plate 15 is respectively fixedly installed with the electric telescopic rod 16, and the telescopic ends of the electric telescopic rod 16 are respectively fixedly installed. A pressure plate 17 is fixedly installed separately, and by starting the electric telescopic rod 16, the pressure plate 17 at the telescopic end thereof is pressed and fixed to the two ends of the composite material to be tested. A detection unit 5 is arranged just above the through groove 14, and the detection unit 5 comprises a first L-shaped fixed plate 51, a motor 52, a driving shaft 54, a movable top pressure frame 55, a sliding rod 56 and a force sensor 59. The driving shaft 54 ​​is rotatably installed on the top of the temperature insulation cabinet 1 through a tapered roller bearing, and a threaded rod is welded at the bottom of the driving shaft 54, and a movable top pressure frame 55 is threadedly installed on the threaded rod, and a force sensor 59 is fixedly installed at the bottom of the movable top pressure frame 55, and sliding rods 56 are respectively slidably installed in the sliding holes arranged at the left and right ends of the movable top pressure frame 55, and the top of the sliding rod 56 is respectively fixed to the inner top of the detection chamber 2 The motor 52 is connected to the top of the driving shaft 54, and the motor 52 is fixedly installed on the inner top of the first L-shaped fixing plate 51 set on the top of the temperature insulation cabinet 1. The output shaft of the motor 52 is fixedly connected to the top of the driving shaft 54. The motor 52 is operated to drive the driving shaft 54 ​​and the first gear 53 to rotate. Since a threaded rod is provided at the bottom of the driving shaft 54, and the threaded rod is threadedly connected to the movable top pressure frame 55, the rotation of the driving shaft 54 ​​will drive the movable top pressure frame 55 to move up and down along the sliding rod 56. During the stretching process, the composite material is pressed by the movable top pressure frame 55 to produce stretching deformation. The force sensor 59 at the bottom of the movable top pressure frame 55 detects the applied force value in real time. The detection unit 5 also includes a first gear 53, a second gear 57 and an encoder 58.The encoder 58, the first gear 53 is welded and arranged at the connection between the output shaft of the motor 52 and the drive shaft 54, the encoder 58 is fixedly installed at one end of the top of the temperature-insulating cabinet 1, and the second gear 57 is fixedly installed at the end of the input shaft of the encoder 58, and the second gear 57 is meshed with the teeth on the first gear 53. Through the meshing of the teeth on the first gear 53 and the second gear 57, as the first gear 53 drives the second gear 57 to rotate, the encoder 58 can record the number of rotations of the drive shaft 54 ​​in real time, and the controller 3 calculates these recorded data, so that the moving stroke of the mobile top pressure frame 55 can be accurately obtained, which provides convenience for the subsequent data analysis and processing of the tensile strength of aircraft composite materials; the air pipe connecting compartment 4 is provided at the bottom of the inner side of the temperature-insulating cabinet 1, and the air intake pipe 7 and the exhaust pipe 8 are respectively provided at the left and right ends of the air pipe connecting compartment 4, one end of the air intake pipe 7 is connected to the cold air exhaust pipe of the refrigeration unit 9 arranged in front of the right end of the temperature-insulating cabinet 1, and the other end of the air intake pipe 7 is provided with a connecting pipe 10, and the other end of the connecting pipe 10 It is connected to the inner top of the detection chamber 2, and a temperature sensor 21 is fixedly installed on the inner left top of the detection chamber 2. One end of the exhaust pipe 8 is connected to the inner bottom of the detection chamber 2, and the other end of the exhaust pipe 8 is set through the outside of the temperature-insulating cabinet 1. The middle of the air inlet pipe 7 and the exhaust pipe 8 are respectively provided with a solenoid valve 18. When the refrigeration unit 9 is operated, the low-temperature air generated by the refrigeration unit 9 is discharged to the inside of the detection chamber 2 through the air inlet pipe 7 and the connecting pipe 10, thereby simulating the low-temperature conditions of aircraft composite materials in the actual use environment, and the original air inside the detection chamber 2 is discharged to the outside through the exhaust pipe 8. The design of the solenoid valve 18 can control the intake or exhaust of the air inlet pipe 7 and the exhaust pipe 8. It also includes a controller 3, which is set at the front end of the right top of the temperature-insulating cabinet 1. The output end of the controller 3 is electrically connected to the input end of the motor 52, the refrigeration unit 9, the electromagnetic iron plate 13 and the electromagnetic valve 18, and the input end of the controller 3 is electrically connected to the output end of the encoder 58, the force sensor 59, the temperature sensor 21 and the external power supply.

[0019] The working principle of the utility model is as follows: when in use, first open the cabinet door 6, pull out the testing platform 12 from the testing chamber 2, and the pulley 20 at the bottom of the testing platform 12 slides outward along the track 11, then place the composite material to be tested on the top of the through slot 14, and start the electric telescopic rod 16 through the controller 3, so that the pressing plate 17 at the telescopic end thereof presses and fixes the two ends of the composite material to be tested, and after the composite material is fixed, push the testing platform 12 to its original position, and since the testing platform 12 is made of magnetic metal material, the electromagnetic plate 13 can be opened by the controller 3 to press the composite material to be tested. The test platform 12 is magnetically connected to fix it firmly. Next, the cabinet door 6 is closed, the refrigeration unit 9 is started by the controller 3, and the solenoid valves 18 on the air inlet pipe 7 and the exhaust pipe 8 are opened at the same time. The low-temperature air generated by the refrigeration unit 9 is discharged to the inside of the test chamber 2 through the air inlet pipe 7 and the connecting pipe 10, thereby simulating the low-temperature conditions of aircraft composite materials in the actual use environment. At the same time, the temperature sensor 21 detects the air temperature inside the test chamber 2 in real time. As the low-temperature air continues to enter the test chamber 2, the original temperature inside the test chamber 2 is reduced. The air is discharged outwards through the exhaust pipe 8. When the temperature detected by the temperature sensor 21 reaches the set temperature, the solenoid valves 18 on the air inlet pipe 7 and the exhaust pipe 8 are closed at the same time, and the refrigeration unit 9 is stopped. Then, the motor 52 is started by the controller 3, so that its output shaft drives the driving shaft 54 ​​and the first gear 53 to rotate. Since a threaded rod is provided at the bottom of the driving shaft 54, and the threaded rod is threadedly connected to the movable top pressure frame 55, the rotation of the driving shaft 54 ​​drives the movable top pressure frame 55 to move up and down along the sliding rod 56. During the stretching process, the composite material is subjected to the moving top pressure frame. The pressure applied by the movable press frame 55 generates tensile deformation. The force sensor 59 at the bottom of the movable press frame 55 detects the applied force value in real time, and records and displays it through the controller 3. At the same time, the first gear 53 is meshed with the teeth on the second gear 57. As the first gear 53 drives the second gear 57 to rotate, the encoder 58 can record the number of rotations of the drive shaft 54 ​​in real time. The controller 3 calculates these recorded data, so that the moving stroke of the movable press frame 55 can be accurately obtained, which provides convenience for the subsequent data analysis and processing of the tensile strength of aircraft composite materials.

[0020] The circuit connection involved in the utility model is a common means used by those skilled in the art, and technical inspiration can be obtained through a limited number of experiments, and it belongs to the widely used existing technology.

[0021] Components not described in detail herein are prior art.

[0022] Although the specific embodiments of the present invention are described in detail above, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in this field without departing from the purpose of the present invention, and modifications or deformations without creative labor are still within the scope of protection of the present invention.

Claims

1. A tensile strength testing device, comprising a temperature-insulating cabinet (1) and a refrigeration unit (9), wherein a cabinet door (6) is rotatably mounted on the top of the front side of the temperature-insulating cabinet (1), characterized in that: The inner top of the temperature-insulating cabinet (1) is provided with a detection chamber (2), and the detection chamber (2) is located directly behind the cabinet door (6). The inner bottom of the detection chamber (2) is provided with tracks (11) at both left and right ends, and a detection platform (12) is slidably installed in the track (11). The detection platform (12) is an inverted "U"-shaped structure. A through slot (14) is provided in the middle of the detection platform (12). The left and right ends of the through slot (14) are respectively provided with fixture assemblies, and the fixture assemblies are respectively fixedly installed on the top of the detection platform (12). A detection plate (14) is provided directly above the through slot (14). The detection unit (5) comprises a first L-shaped fixed plate (51), a motor (52), a drive shaft (54), a movable pressure frame (55), a slide rod (56) and a force sensor (59). The drive shaft (54) is rotatably mounted on the top of the temperature-insulating cabinet (1) through a tapered roller bearing. A threaded rod is welded to the bottom of the drive shaft (54), and a movable pressure frame (55) is threadedly mounted on the threaded rod. The force sensor (59) is fixedly mounted on the bottom of the movable pressure frame (55). The movable pressure frame (55) is slidably mounted in the slide holes provided at the left and right ends of the movable pressure frame (55). A slide bar (56) is provided, and the top of the slide bar (56) is respectively fixedly connected to the inner top of the detection chamber (2); a motor (52) is provided above the top of the drive shaft (54), and the motor (52) is fixedly installed on the inner top of a first L-shaped fixing plate (51) provided on the top of the temperature-isolating cabinet (1); the output shaft of the motor (52) is fixedly connected to the top of the drive shaft (54); an air pipe connecting chamber (4) is provided at the inner bottom of the temperature-isolating cabinet (1); an air intake pipe (7) and an exhaust pipe (8) are respectively provided at the left and right ends of the air pipe connecting chamber (4); the air intake pipe (7) One end of the air inlet pipe (7) is connected to the cold air exhaust pipe of the refrigeration unit (9) arranged in front of the right end of the temperature-isolating cabinet (1); the other end of the air inlet pipe (7) is provided with a connecting pipe (10); the other end of the connecting pipe (10) is connected to the inner top of the detection chamber (2); a temperature sensor (21) is fixedly installed on the left top of the interior of the detection chamber (2); one end of the exhaust pipe (8) is connected to the inner bottom of the detection chamber (2), and the other end of the exhaust pipe (8) is arranged through the outside of the temperature-isolating cabinet (1); and electromagnetic valves (18) are respectively arranged in the middle of the air inlet pipe (7) and the exhaust pipe (8).

2. A tensile strength testing device according to claim 1, characterized in that: Wheel grooves (19) are respectively arranged at the left and right ends of the bottom of the detection platform (12), pulleys (20) are rotatably mounted at the front and rear ends of the wheel grooves (19), and a handle is welded at the middle of the front side of the detection platform (12).

3. A tensile strength testing device according to claim 1, characterized in that: The clamp assembly comprises a second L-shaped fixing plate (15), an electric telescopic rod (16) and a pressing plate (17); two second L-shaped fixing plates (15) are provided, and the second L-shaped fixing plates (15) are respectively symmetrically arranged on the top of the detection platform (12); the top of the second L-shaped fixing plate (15) is respectively fixedly mounted with an electric telescopic rod (16); and the telescopic ends of the electric telescopic rod (16) are respectively fixedly mounted with a pressing plate (17).

4. A tensile strength testing device according to claim 1, characterized in that: The detection unit (5) also includes a first gear (53), a second gear (57) and an encoder (58), wherein the first gear (53) is welded to the connection between the output shaft of the motor (52) and the drive shaft (54), the encoder (58) is fixedly mounted on one end of the top of the temperature-insulating cabinet (1), and the input shaft end of the encoder (58) is fixedly mounted with a second gear (57), and the second gear (57) is meshed with the teeth on the first gear (53).

5. A tensile strength testing device according to claim 1, characterized in that: The detection platform (12) is made of magnetic metal, and the rear side of the detection platform (12) is magnetically connected to an electromagnet plate (13) arranged at the bottom of the rear side of the detection chamber (2).

6. A tensile strength testing device according to claim 1, characterized in that: The invention also includes a controller (3), which is arranged at the front end of the top right side of the temperature-insulating cabinet (1), the output end of the controller (3) is electrically connected to the input end of the motor (52), the refrigeration unit (9), the electromagnetic plate (13) and the electromagnetic valve (18), and the input end of the controller (3) is electrically connected to the output end of the encoder (58), the force sensor (59), the temperature sensor (21) and the external power supply.

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