Device for testing mechanical property of material in thermal environment stretching

Abstract

The utility model relates to a testing device, in particular to a mechanical property testing device for thermal environment stretching of a material. The testing device is composed of a tensile machine, a supporting frame, a reflecting plate and quartz lamp tubes, the tensile machine is provided with the supporting frame, the supporting frame is in a U shape, the reflecting plate is arranged on the inner side of the supporting frame, and the quartz lamp tubes are evenly distributed at the front end of the reflecting plate. According to the testing device, the test piece is heated through irradiation, the temperature around the test piece and the temperature on the surface of the test piece can be rapidly adjusted, rapid heating or rapid cooling can be achieved, real-time control can be conducted according to a transient heating curve, adjustment delay can be reduced, a tensile test can be conducted under the condition that the temperature of the test piece is accurate, and the accuracy of a test result can be effectively guaranteed. The two ends of the quartz lamp tube and the reflecting plate can be cooled through circulating cooling water, and the service life of the quartz lamp tube and the service life of the reflecting plate can be effectively prolonged. The problem that temperature adjustment of existing test equipment is delayed and cannot be adjusted in real time is solved.

Description

Technical Field

[0001] The utility model relates to a testing device, in particular to a mechanical property testing device for tensile testing of materials in a thermal environment. Background Art

[0002] With the wide application of superalloys, titanium alloys, and composite materials in the fields of aviation, aerospace, etc., it is becoming increasingly important to study their mechanical properties in high-temperature environments. The physical heat transfer process can be achieved through three ways: conduction, convection, and radiation.

[0003] At present, the high-temperature tensile properties of materials are mostly detected by a split-type resistance furnace installed on a tensile testing machine. The patent application with the publication number CN109163982A discloses a thermal environment bidirectional loading test device and test method, which is used for optical speckle strain measurement of cruciform specimens, including a frame, a heating furnace, four tensile devices, a light source, and a camera. The tensile rods of the tensile devices extend into the interior of the heating furnace through the wall holes of the heating furnace, so that the chucks are located inside the heating furnace, causing the specimen to be in the heating furnace under the clamping of the four chucks. When the linear drive mechanism drives each tensile rod to move linearly, the specimen is stretched, and a force measuring sensor is arranged on the tensile rod to measure the tensile force borne by the specimen, and the effective testing of the mechanical properties of cruciform specimens under high-temperature environments and bidirectional loading conditions can be realized.

[0004] The above test device can test the mechanical properties of materials in a thermal environment, but in the heating furnace mode, the ambient temperature around the material cannot be quickly adjusted. When adjusting the temperature, the resistance wire is heated. Since the resistance wire cannot be quickly cooled, it cannot be controlled in real time according to the transient heating curve. Therefore, it is necessary to design a mechanical property testing device for tensile testing of materials in a thermal environment to solve the above problems. Summary of the Invention

[0005] The purpose of the utility model is to provide a mechanical property testing device for tensile testing of materials in a thermal environment that can quickly adjust the temperature, can be adjusted in real time, and can ensure the accurate temperature of the specimen.

[0006] The technical solution of the utility model is as follows:

[0007] A mechanical property testing device for tensile testing of materials in a thermal environment, which is composed of a tensile testing machine, a support frame, a reflector, and quartz lamp tubes. It is characterized in that: a support frame is arranged on the tensile testing machine, the support frame is in a U shape, a reflector is arranged inside the support frame, and quartz lamp tubes are evenly distributed at the front end of the reflector.

[0008] Metal electrodes are respectively arranged at both ends of the quartz lamp tubes, and the metal electrodes are fixedly connected with the quartz lamp tubes through fixing bolts.

[0009] Both ends of the metal electrode are respectively connected with electrode circulating cooling pipes, and the electrode circulating cooling pipes are respectively fixedly connected with the reflecting plate and the support frame through insulators.

[0010] A circulating cooling water tank is arranged on the reflecting plate, and reflecting plate cooling water connection ports are respectively arranged on both sides of the circulating cooling water tank.

[0011] The tensile testing machine includes a machine table, a lifting cross beam and chucks.

[0012] The beneficial effects of the present utility model are as follows:

[0013] The mechanical property testing device for tensile testing of the material under a thermal environment heats the test piece through the irradiation of quartz lamp tubes, can quickly adjust the temperature around the test piece and on the surface of the test piece, can quickly increase or decrease the temperature, can perform real-time control according to the transient temperature increase curve, reduce the adjustment delay, can perform tensile testing when the temperature of the test piece is accurate, and can effectively ensure the accuracy of the test results. The quartz lamp tube ends and the reflecting plate can be cooled through circulating cooling water, which can effectively extend the service life of the quartz lamp tube and the reflecting plate. It solves the problems of temperature adjustment hysteresis and inability to perform real-time adjustment of existing test equipment. Description of the Drawings

[0014] Figure 1 is a structural schematic diagram of the present utility model;

[0015] Figure 2 is a sectional schematic diagram of the present utility model;

[0016] Figure 3 is a connection schematic diagram of the reflecting plate of the present utility model;

[0017] Figure 4 is a distribution schematic diagram of the quartz lamp tubes of the present utility model.

[0018] In the figure: 1, support frame; 2, reflecting plate; 3, quartz lamp tube; 4, metal electrode; 5, fixing bolt; 6, electrode circulating cooling pipe; 7, insulator; 8, circulating cooling water tank; 9, reflecting plate cooling water connection port; 10, machine table; 11, lifting cross beam; 12, chuck; 13, test piece. Detailed Embodiments

[0019] The mechanical property testing device for tensile testing of the material under a thermal environment is composed of a tensile testing machine, a support frame 1, a reflector 2, and a quartz lamp tube 3. A support frame 1 is arranged on the tensile testing machine. The support frame 1 is in a U shape. A reflector 2 is arranged inside the support frame 1. Quartz lamp tubes 3 are evenly distributed at the front end of the reflector 2 to irradiate light and heat generated by the quartz lamp tubes 3 onto the specimen, thereby heating the environment around the specimen and the specimen, causing the specimen to heat up, and thus conducting a tensile test on the specimen in a high-temperature state, so as to detect the mechanical properties of the specimen under tensile in a thermal environment. Since the quartz lamp tubes 3 heat the specimen through irradiation, they can quickly heat up the specimen and can interrupt heating the specimen immediately after interrupting irradiation, and can thus quickly cool down the specimen. The heating process can be controlled in real time according to the transient heating curve to ensure accurate test results. The function of the reflector 2 is to reflect the light and heat irradiated by the quartz lamp tubes 3 to the rear end forward through the reflector 2, so that most of the light and heat irradiated by the quartz lamp tubes 3 is used to heat the specimen, thereby reducing waste and reducing the energy consumption of the quartz lamp tubes 3.

[0020] Metal electrodes 4 are respectively arranged at both ends of the quartz lamp tube 3. The metal electrodes 4 are fixedly connected to the quartz lamp tube 3 through fixing bolts 5. The power supply can be connected through the metal electrodes 4, and then power is supplied to both ends of the quartz lamp tube 3 through the metal electrodes 4 respectively to drive the quartz lamp tube 3 to work. Since the quartz lamp tube 3 is fixedly connected to the metal electrode 4 through the fixing bolt 5, the quartz lamp tube 3 can be disassembled from the metal electrode 4 respectively, and thus the damaged quartz lamp tube 3 can be replaced, which is convenient for maintenance.

[0021] Electrode circulating cooling pipes 6 are respectively connected to both ends of the metal electrode 4. The electrode circulating cooling pipes 6 are respectively fixedly connected to the reflector 2 and the support frame 1 through insulators 7. One end of the electrode circulating cooling pipe 6 is communicated with the circulating cooling water, and the other end of the electrode circulating cooling pipe 6 is communicated with the circulating channel on the metal electrode 4, so that the circulating cooling water can circulate in the metal electrode 4 to cool the metal electrode 4, and then cool the end of the quartz lamp tube 3 to protect the connection position between the end of the quartz lamp tube 3 and the metal electrode 4, avoid the melting of the quartz lamp tube 3 and the metal electrode 4, and thus ensure the detachable property of the quartz lamp tube 3.

[0022] A circulating cooling water tank 8 is arranged on the reflector 2. Reflector cooling water connection ports 9 are respectively arranged on both sides of the circulating cooling water tank 8. The reflector cooling water connection ports 9 are communicated with the circulating cooling water to supply water to the circulating cooling water tank 8 through the reflector cooling water connection ports 9, and then cool the reflector 2 through the circulating cooling water to protect the reflector.

[0023] The tensile testing machine includes a machine table 10, a lifting crossbeam 11, and chucks 12. The machine table 10 is provided with a lifting crossbeam 11, and the lifting crossbeam 11 can be lifted on the machine table through a hydraulic cylinder, an electric cylinder, or a lead screw pair; chucks 12 capable of clamping a test piece are respectively provided on the lifting crossbeam 11 and on the machine table 10 below the lifting crossbeam. Since one of the chucks 12 is fixed on the machine table 10 and the other chuck 12 is fixed on the lifting crossbeam 11, the lifting crossbeam 11 can drive the chuck 12 to lift during the lifting process, thereby applying a tensile force to the test piece fixed between the chucks 12.

[0024] When the mechanical property testing device for tensile testing of the material under a thermal environment is detecting, the test piece is fixed on the chuck 12. Circulating cooling water is introduced into the metal electrode 4 through the electrode circulating cooling pipe 6, and circulating cooling water is introduced into the circulating cooling water tank 8 through the reflecting plate cooling water connection port 9 to cool the metal electrode 4 and the reflecting plate 2 respectively. After the metal electrode 4 and the circulating cooling water tank 8 are respectively filled with water, power is supplied to the quartz lamp tube 3 through the metal electrode 4, so that the quartz lamp tube 3 irradiates the test piece to heat the test piece. When the surface temperature of the test piece reaches the set temperature, the tensile testing machine is started to apply a tensile force to the test piece, and the mechanical properties of the test piece under a high-temperature environment are tested, and the strength, elastic modulus, linear expansion coefficient, and fracture elongation rate of the test piece are tested.

[0025] For example: the cross-sectional width of the test piece is 30.4 mm, the thickness is 5.6 mm, the length is 240 mm, the room temperature is 11 °C. After the test piece is thermally inspected according to the set temperature curve, the front surface temperature of the test piece is 322 °C, the back surface temperature of the test piece is 326 °C, the maximum load borne by the test piece is 2122 N, and the mechanical parameters are obtained through a computer: strength: 12.6 Mpa; elastic modulus: 9.7 Gpa; linear expansion coefficient: -1.19×10 -6 ; fracture elongation rate: 0.1%.

[0026] The mechanical property testing device for tensile testing of the material under a thermal environment heats the test piece through the irradiation of the quartz lamp tube 3, can quickly adjust the temperature around the test piece and on the surface of the test piece, can quickly raise the temperature or quickly lower the temperature, can perform real-time control according to the transient temperature rise curve, reduce the adjustment delay, can perform a tensile test when the temperature of the test piece is accurate, and can effectively ensure the accuracy of the test results. The quartz lamp tube ends and the reflecting plate can be cooled through circulating cooling water, which can effectively extend the service life of the quartz lamp tube and the reflecting plate. It solves the problems of temperature adjustment hysteresis and inability to adjust in real time of the existing test equipment.

Claims

1. A mechanical property testing device for tensile of a material under a thermal environment, which is composed of a tensile testing machine, a support frame (1), a reflector (2) and a quartz lamp tube (3), and is characterized in that: There is a support frame (1) arranged on the tensile testing machine. The support frame (1) is in a U shape. A reflector (2) is arranged inside the support frame (1), and quartz lamp tubes (3) are evenly distributed at the front end of the reflector (2).

2. The mechanical property testing device for stretching of a material under a thermal environment according to claim 1, wherein: Metal electrodes (4) are respectively arranged at both ends of the quartz lamp tube (3), and the metal electrodes (4) are fixedly connected to the quartz lamp tube (3) through fixing bolts (5).

3. The mechanical property testing device for tensile of a material under a thermal environment according to claim 2, wherein: Electrode circulating cooling pipes (6) are respectively connected to both ends of the metal electrode (4), and the electrode circulating cooling pipes (6) are fixedly connected to the reflector (2) and the support frame (1) through insulators (7).

4. The mechanical property testing device for stretching of a material under a thermal environment according to claim 1, wherein: A circulating cooling water tank (8) is arranged on the reflector (2), and reflector cooling water connection ports (9) are respectively arranged on both sides of the circulating cooling water tank (8).

5. The mechanical property testing device for stretching of a material under a thermal environment according to claim 1, wherein: The tensile testing machine includes a machine table (10), a lifting cross beam (11) and a chuck (12).

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