A metal rubber vibration damper thermal mechanical fatigue testing machine and testing method thereof

Abstract

The present invention discloses a metal rubber vibration damper thermomechanical fatigue testing machine and a testing method thereof, comprising a resistance furnace motion control system, a resistance furnace heating and cooling system, a measurement and support system, a control system, a testing machine frame, and a circulating water cooling system. The heating system uses a resistance furnace to heat the metal rubber vibration damper specimen. The measuring system includes a temperature sensor, a force sensor, and a high-temperature extensometer, which are respectively used to measure the temperature distribution, force load, and deformation of the specimen; the control system includes a switch, a touch screen, an industrial computer, and a PLC test program. The circulating water cooling system includes a water pump, a water pump motor, a water tank, etc., which are used to cool the axial loading shaft of the testing machine to avoid damage to the sensors and other components of the testing machine due to excessive temperature. The present invention has high heating and cooling efficiency and can solve the problems of low accuracy and slow testing speed of existing thermomechanical fatigue testing machines.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical components and material testing, in particular to a metal rubber vibration damper thermal mechanical fatigue testing machine and a testing method thereof. Background Art

[0002] "Thermomechanical fatigue" refers to the fatigue failure phenomenon caused by mechanical components or materials subjected to mechanical loads and thermal cycling or temperature fluctuations over long periods of time in a high-temperature environment. This fatigue can lead to a significant decrease in component or material performance, the formation or expansion of cracks in the material, and ultimately shorten the component or material's service life. Some critical components operating in alternating high and low temperature environments for a long time may experience thermomechanical fatigue failure, resulting in equipment malfunction, causing economic losses or even more serious consequences. Therefore, studying the thermomechanical fatigue properties of mechanical components and materials is crucial.

[0003] Invention application number CN202110333243.7 proposes a cooling and heating method using water cooling and laser heating, using the rotation of a disk to rotate the specimen for thermal fatigue testing. However, there are issues such as the high cost of the test equipment.

[0004] Patent application number CN202222213691.6 proposes a thermal mechanical fatigue testing machine, addressing existing issues where the test piece cannot fully enter the medium tank for cooling, severely impacting the tester's performance and making it prone to specimen drop. However, the machine suffers from a drawback: loading is performed through bolts and nuts, making it impossible to measure force.

[0005] The patent with application number CN202120401735.0 uses a pneumatic solenoid valve to control the telescopic movement of the telescopic part, so that the sample is extended to the center of the induction heating coil for heating, and then extended into the cooling tank for cooling. This method has a fast heating and cooling speed, but there are problems such as uneven temperature zones on the sample.

[0006] A metal-rubber shock absorber is a device used to reduce mechanical vibration and noise. It typically consists of a metal housing wrapped with a metal-rubber material made of wire. This type of shock absorber is widely used in industrial machinery, automobiles, building structures, aerospace, and other fields.

[0007] The development of metal-rubber vibration dampers is closely tied to the progress of industrialization. With the development and increasing use of mechanical equipment, vibration and noise issues have become increasingly prominent. Vibration not only reduces the efficiency and lifespan of mechanical equipment but can also impact the surrounding environment and the health of workers. Therefore, the development of vibration reduction technology has become a crucial topic in the engineering field.

[0008] The history of metal-rubber shock absorbers can be traced back to the early 20th century. Initially, simple spring shock absorbers were used. However, with the development of industry and the increasing demand for vibration control, traditional spring shock absorbers could no longer meet the needs. Thus, metal-rubber shock absorbers came into being.

[0009] Metal-rubber vibration dampers utilize the combined elasticity of rubber and the rigidity of metal to effectively absorb and damp vibration energy, while simultaneously reducing the vibration and noise transmitted to the structure and surrounding environment. The use of these dampers not only improves the performance and reliability of mechanical equipment, but also improves the working environment and reduces noise pollution. To adapt metal-rubber vibration dampers to more extreme and harsh environments, research on their thermomechanical fatigue properties is crucial. Therefore, this invention holds significant practical research significance. Summary of the Invention

[0010] In view of this, the object of the present invention is to provide a metal rubber vibration damper thermomechanical fatigue testing machine and a testing method thereof, which has high heating and cooling efficiency and can solve the problems of low accuracy and slow testing speed of existing thermomechanical fatigue testing machines.

[0011] To achieve the above-mentioned object, the present invention adopts the following technical solutions: a metal rubber vibration damper thermomechanical fatigue testing machine, comprising a resistance furnace motion control system, a heating system, a cooling system, a support and measurement system, a control system, a testing machine frame, and a circulating water cooling system;

[0012] The resistance furnace motion control system includes a stepper motor, a coupling, a side panel, an optical axis positioning seat, a locking bolt, a screw bearing seat, a ball screw, a heating furnace and nut seat connector, a screw nut and nut seat, a guide optical axis support seat, and a guide optical axis;

[0013] The heating system includes a resistance furnace, a temperature sensor in the furnace and a temperature control box;

[0014] The cooling system includes a cooling fan and a cooling fan support;

[0015] The support and measurement system includes an upper water jacket, a water jacket core shaft, an upper specimen seat support, an upper specimen seat, a metal rubber shock absorber specimen, a lower specimen seat, a lower specimen seat support, an upper guide shaft, a pressure nut, a universal ball, a force sensor, a guide sleeve, a lower guide shaft, an electric cylinder, a counting box, an electromagnetic induction counter, a magnet, a high-temperature extensometer, an in-shaft temperature sensor, a high-temperature extensometer data display, and a lower water jacket;

[0016] The control system includes power switch, touch screen, industrial computer, and PLC fatigue test application program;

[0017] The resistance furnace motion control system, heating system, cooling system, support and measurement system, and control system are all fixed on the testing machine frame; the testing machine frame includes an upper sample seat support, a water jacket core shaft, a lower sample seat support, and an electric cylinder;

[0018] The circulating water cooling system includes a water pump, a water pump motor and a water tank, and the water pump, the water pump motor and the water tank are fixed to the circulating water system base;

[0019] The upper specimen seat support is installed on the lower side of the water jacket core shaft, and the upper water jacket core shaft is connected to the testing machine frame by bolts; the lower specimen seat support is installed on the upper side of the upper guide shaft; the upper guide shaft is equipped with an upper water jacket; the lower guide shaft is equipped with a lower water jacket; the upper water jacket and the lower water jacket are connected to the water tank, and the upper specimen seat support system is cooled by water cooling circulation during heating; the cooling fan is connected to the cooling fan support and installed on the testing machine frame; the force sensor is installed on the upper side of the lower guide shaft; the upper guide shaft and the lower guide shaft are subjected to force transmission through a pressure nut and a universal ball; the lower guide shaft is connected to the force sensor through bolts and cooperates with the guide shaft sleeve; the guide shaft sleeve is installed on the testing machine frame by bolts to achieve the force transmission stability of the system;

[0020] The high-temperature extensometer is installed on the side of the metal rubber vibration damper to monitor its deformation in real time; the in-axis temperature sensor is installed inside the upper sample holder to monitor the temperature of the sample in real time; the stepper motor, force sensor, in-axis temperature sensor, high-temperature extensometer data display screen, and cooling fan are connected to the control system.

[0021] In a preferred embodiment, the water jacket core shaft is connected to the testing machine frame by bolts, and the upper specimen seat support is connected to the upper water jacket core shaft by threads. The distance between the upper specimen seat support and the upper water jacket core shaft can be adjusted by loosening or tightening the threads to adapt to specimens of different lengths.

[0022] In a preferred embodiment, the cooling fan is mounted on the testing machine frame with its air outlet facing the specimen. In a preferred embodiment, the upper and lower water jackets are connected to a water tank via water pipes. During heating, a water cooling cycle is used to cool the upper specimen support system, thereby preventing other components of the testing machine from overheating and potentially being damaged during the heating process.

[0023] In a preferred embodiment, the stepping motor in the resistance furnace motion control system of the metal rubber vibration damper thermomechanical fatigue testing machine is connected to and controlled by the PLC in the control system.

[0024] In a preferred embodiment, the cooling fan in the resistance furnace heating and cooling system of the metal rubber vibration damper thermal mechanical fatigue testing machine is connected to and controlled by the PLC in the control system, the temperature of the resistance furnace is controlled by the temperature control box, and the temperature control box is controlled by the control system.

[0025] In a preferred embodiment, the in-axis temperature sensor in the support and measurement system of the metal-rubber vibration damper thermomechanical fatigue testing machine is installed inside the upper specimen holder and connected to and controlled by the control system. The force sensor in the measurement system is also connected to the control system. A high-temperature extensometer can be used to monitor the height changes of the metal-rubber vibration damper, reflecting its deformation during heating and cooling. In a preferred embodiment, the control system of the metal-rubber vibration damper thermomechanical fatigue testing machine includes a power switch that controls each component. A PLC is connected to an industrial computer and controlled by the fatigue test application program in the industrial computer. The touch screen displays the operating status of the fatigue test, including operating speed, specimen heating temperature, holding time, cooling temperature, cooling time, and number of runs.

[0026] The present invention provides an experimental method for a metal-rubber vibration damper thermomechanical fatigue testing machine, which uses the above-mentioned metal-rubber vibration damper thermomechanical fatigue testing machine: a resistance furnace is used to heat the metal-rubber vibration damper sample; a motor-ball screw is used to change the position of the resistance furnace to achieve thermal cycling;

[0027] (1) The control system controls the motor to rotate, causing the screw to rotate, and the screw nut drives the resistance furnace to move, heating the metal rubber shock absorber sample;

[0028] (2) When the temperature reaches the specified temperature, keep it warm for 5 minutes; then, raise the heating furnace to expose the metal rubber shock absorber sample, and at the same time, the cooling fan rotates to quickly cool the sample;

[0029] (3) When the temperature drops to room temperature, the heating furnace descends and continues heating, completing a thermal cycle;

[0030] (4) The metal rubber shock absorber specimen is loaded by an electric cylinder and subjected to a constant load axial force.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] (1) The device has a simple structure, is easy to install, and has low cost. The entire device is connected using simple bolts.

[0033] (2) Resistance furnace heating is used to avoid expensive heating methods such as laser heating and induction coil heating.

[0034] (3) The degree of automation is high, and safe and efficient thermal fatigue testing can be achieved through the control system. The number of cycles can be flexibly calculated using the electromagnetic induction counter, which simplifies the design of the test program.

[0035] (4) Good heating and cooling methods. The metal rubber shock absorber sample is heated evenly, sealed and heated quickly: air cooling is used instead of water cooling, so that the sample is not affected by accidental factors.

[0036] (5) Two metal rubber shock absorber specimens can be measured at one time, which greatly improves the efficiency of the experiment and saves time costs.

[0037] (6) High safety factor and long service life of the testing machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a partial schematic diagram of the resistance furnace motion control system;

[0039] Figure 3 This is a schematic diagram of the heating and cooling system of the resistance furnace;

[0040] Figure 4 Schematic diagram of the support and measurement system;

[0041] Figure 5 for Figure 3 The internal structure diagram at A in the middle;

[0042] Figure 6 This is the working principle diagram of the resistance furnace motion control system;

[0043] Figure 7 It is the control principle diagram of the present invention;

[0044] Figure 8 It is the circulating water cooling system of the testing machine;

[0045] Resistance furnace motion control system 1: 101-motor, 102-coupling, 103-side panel, 104-optical axis positioning seat, 105-locking bolt, 106-screw bearing seat, 107-ball screw, 108-connector between heating furnace and nut seat, 109-screw nut and nut seat, 110-guide optical axis support seat, 111-guide optical axis;

[0046] Resistance furnace heating and cooling system 2: 201-heating furnace, 202-furnace temperature sensor, 203-cooling fan, 204-temperature control box, 205-cooling fan support;

[0047] Support and measurement system 3: 301-upper water jacket, 302-water jacket mandrel, 303-upper specimen seat support, 304-upper specimen seat, 305-metal rubber vibration damper, 306-lower specimen seat, 307-lower specimen seat support, 308-upper guide shaft, 309-pressure nut, 310-universal ball, 311-force sensor, 312-guide sleeve, 313-lower guide shaft, 314-electric cylinder, 315-counting box, 316-electromagnetic induction counter, 317-magnet, 318-high-temperature extensometer, 319-in-axis temperature sensor, 320-high-temperature extensometer data display, 321-lower water jacket, 4-industrial control box, 5-testing machine frame;

[0048] Circulating water cooling system 6: 301-upper water jacket, 321-lower water jacket, 601-circulating water system base, 602-water tank, 603-water pump, 604-water pump motor, 605-water inlet pipe, 606-water outlet pipe. DETAILED DESCRIPTION

[0049] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0050] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present application belongs.

[0051] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application; as used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form, and it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or their combinations.

[0052] The present invention relates to a metal rubber vibration damper thermal mechanical fatigue experimental device, referring to Figure 1-8 The metal rubber vibration damper thermal mechanical fatigue testing machine is characterized by including a resistance furnace motion control system 1, a resistance furnace heating and cooling system 2, a support and measurement system 3, a control system 4, a testing machine frame 5 and a testing machine circulating water cooling system 6.

[0053] like Figure 1The resistance furnace motion control system 1 includes a stepper motor 101, a coupling 102, a side panel 103, an optical axis positioning seat 104, a locking bolt 105, a screw bearing seat 106, a ball screw 107, a heating furnace and nut seat connector 108, a screw nut and nut seat 109, a guide optical axis support seat 110, and a guide optical axis 111; the control system controls the forward and reverse rotation of the stepper motor 101, so that the resistance furnace 201 moves up and down to achieve thermal cycling. The heating system includes a resistance furnace 201, a furnace temperature sensor 202, and a temperature control box 204; the temperature conditions of the test are adjusted by setting the temperature control box 204. The cooling system consists of a cooling fan 203 and a cooling fan support 205. When cooling is required, the control system can control the cooling fan 203 to rotate so that the metal rubber vibration damper sample 305 can be cooled quickly;

[0054] The support and measurement system includes an upper water jacket 301, a water jacket core shaft 302, an upper specimen seat support 303, an upper specimen seat 304, a metal rubber vibration damper specimen 305, a lower specimen seat 306, a lower specimen seat support 307, an upper guide shaft 308, a pressure nut 309, a universal ball 310, a force sensor 311, a guide sleeve 312, a lower guide shaft 313, an electric cylinder 314, a counting box 315, an electromagnetic induction counter 316, a magnet 317, a high-temperature extensometer 318, an in-shaft temperature sensor 319, a high-temperature extensometer data display 320, and a lower water jacket 321.

[0055] The in-axis temperature sensor 319 is used to monitor the sample temperature in real time and provide feedback to the control system 4. The force sensor 311 is used to monitor the load size to adjust the electric cylinder 314. The displacement sensor 318 is used to monitor the deformation of the sample.

[0056] The control system includes a power switch, touch screen, industrial computer 4, and a PLC fatigue test application program. All components, including the upper specimen holder support 303, water jacket core shaft 302, lower specimen holder support 307, and electric cylinder 314, are assembled and fixed to the testing machine frame 5 and can be adjusted according to the position. The circulating water cooling system 6 includes a water pump 604, a water pump motor 603, and a water tank 602. These components are all fixed to the circulating water system base 601.

[0057] like Figure 4 As shown, the metal rubber shock absorber 305 is installed on the testing machine through the upper sample seat 304 and the lower sample seat 306. The electric cylinder 314 transmits the load to the sample 305 through the lower guide shaft 313, the lower sample seat support 307 and the pressure nut 309.

[0058] like Figure 5As shown, an in-axis temperature sensor 319 is installed inside the lower specimen holder 306 and connected to the control system via a wire to monitor the specimen temperature in real time. A high-temperature extensometer 318 is installed on the side of the metal-rubber vibration damper and connected to a metal-rubber data display 320 via a wire. The metal-rubber data display 320 is connected to the control system to monitor the specimen's displacement in real time.

[0059] like Figure 7 As described above, the stepper motor 101, cooling fan 203, temperature control box 204, electric cylinder 314, counting box 315, high temperature extensometer 318, and in-axis temperature sensor 319 are all connected to the control system 4 through wires and are controlled by it. By setting parameters on the industrial computer 4, the heating temperature, holding time, cooling temperature, cooling time, and number of operations of the test specimen can be specified.

[0060] The temperature sensor 319 is installed inside the upper specimen holder 306 and is connected to and controlled by the control system. The high-temperature extensometer 318 in the measurement system is in contact with the metal rubber vibration damper. The high-temperature extensometer 318 is connected to the high-temperature extensometer data display 320. The high-temperature extensometer data display 320 can record data and transmit the data to the control system. The force sensor 311 in the measurement system is also connected to the control system. The electromagnetic induction counter 316 in the measurement system can sense the distance between the magnet installed on the resistance furnace. When the resistance furnace rises to 0-30mm from the counter and stops, and then the resistance furnace drops 20mm, the screen of the counting box 315 will record one thermal cycle cycle. When the specified number of thermal cycle tests is reached, the control system detects the signal and immediately stops the test.

[0061] like Figure 8 As described above, a circulating water cooling device is used for water cooling. The 301 upper water jacket and the 321 lower water jacket are connected to the water pump and the external water tank through the water inlet and outlet pipes. The water pump keeps the cooling water flowing quickly between the external water tank and the 301 upper water jacket and the 321 lower water jacket, ensuring that the high temperature in the furnace is transferred to the load sensor and the electric cylinder as little as possible, thereby ensuring the accuracy and safety of the experimental system.

[0062] Example 1

[0063] The metal rubber vibration damper is fixed vertically in the testing machine through the upper and lower specimen holders. The thermal cycle low temperature value is set to 20℃ and the high temperature value is set to 450℃. Then the thermal cycle is started. During the heating stage, the metal rubber vibration damper is heated at a uniform rate. When the temperature of the metal rubber vibration damper reaches 450℃, the heat preservation begins. During the heat preservation stage, the temperature of the metal rubber vibration damper is controlled at 450℃. When the heat preservation ends, the heating is stopped and the metal rubber vibration damper is rapidly cooled by the air blown by the cooling fan. When the temperature of the metal rubber vibration damper reaches 20℃, the cooling stops. At this point, one thermal cycle ends; at the same time, the next thermal cycle begins.

[0064] Example 2

[0065] The metal-rubber shock absorber was vertically secured within the testing machine via the upper and lower specimen holders. The low temperature value for the thermomechanical fatigue cycle was set to 20°C and the high temperature value to 450°C. The axial load was set by adjusting the electric cylinder. The circulating water cooling system was activated, and the thermomechanical fatigue test was then conducted. A high-temperature extensometer monitored the deformation of the metal-rubber shock absorber in real time. All data was recorded on the high-temperature extensometer's data display and imported into the control system for storage. The electromagnetic induction counter transmitted a signal to the control system after reaching the specified number of cycles. This concluded the thermomechanical fatigue test.

[0066] In summary, this invention addresses the problem of high dispersion in thermomechanical fatigue test results, making it difficult to ensure the reliability of test data. It has broad application prospects and economic benefits. It also provides a test method for evaluating the service reliability of metal-rubber shock absorbers. The test results are of great reference value for promoting the engineering application of metal-rubber shock absorbers.

Claims

1. A metal rubber shock absorber thermal mechanical fatigue testing machine, characterized in that Including resistance furnace motion control system, heating system, cooling system, support and measurement system, control system, testing machine frame and circulating water cooling system; The resistance furnace motion control system includes a stepper motor, a coupling, a side panel, an optical axis positioning seat, a locking bolt, a screw bearing seat, a ball screw, a heating furnace and nut seat connector, a screw nut and nut seat, a guide optical axis support seat, and a guide optical axis; The heating system includes a resistance furnace, a temperature sensor in the furnace and a temperature control box; The cooling system includes a cooling fan and a cooling fan support; The support and measurement system includes an upper water jacket, a water jacket core shaft, an upper specimen seat support, an upper specimen seat, a metal rubber shock absorber specimen, a lower specimen seat, a lower specimen seat support, an upper guide shaft, a pressure nut, a universal ball, a force sensor, a guide sleeve, a lower guide shaft, an electric cylinder, a counting box, an electromagnetic induction counter, a magnet, a high-temperature extensometer, an in-shaft temperature sensor, a high-temperature extensometer data display, and a lower water jacket; The control system includes power switch, touch screen, industrial computer, and PLC fatigue test application program; The resistance furnace motion control system, heating system, cooling system, support and measurement system, and control system are all fixed on the testing machine frame; the testing machine frame includes an upper sample seat support, a water jacket core shaft, a lower sample seat support, and an electric cylinder; The circulating water cooling system includes a water pump, a water pump motor and a water tank, and the water pump, the water pump motor and the water tank are fixed to the circulating water system base; The upper specimen seat support is installed on the lower side of the water jacket core shaft, and the water jacket core shaft is connected to the testing machine frame by bolts; the lower specimen seat support is installed on the upper side of the upper guide shaft; the upper guide shaft is equipped with an upper water jacket; the lower guide shaft is equipped with a lower water jacket; the upper water jacket and the lower water jacket are connected to the water tank, and the upper specimen seat support system is cooled by water cooling circulation during heating; the cooling fan is connected to the cooling fan support and installed on the testing machine frame; the force sensor is installed on the upper side of the lower guide shaft; the upper guide shaft and the lower guide shaft are subjected to force transmission through a pressure nut and a universal ball; the lower guide shaft is connected to the force sensor through bolts and cooperates with the guide shaft sleeve; the guide shaft sleeve is installed on the testing machine frame by bolts to achieve the force transmission stability of the system; The high temperature extensometer is installed on the side of the metal rubber shock absorber to monitor its deformation in real time; The in-axis temperature sensor is installed inside the upper sample holder and is used to monitor the temperature of the sample in real time; the stepping motor, force sensor, in-axis temperature sensor, high-temperature extensometer data display screen, and cooling fan are connected to the control system.

2. The metal rubber vibration damper thermomechanical fatigue testing machine according to claim 1, characterized in that: The water jacket core shaft is connected to the testing machine frame through bolts, and the upper sample seat support is connected to the upper water jacket core shaft through threads. The distance between the upper sample seat support and the upper water jacket core shaft can be adjusted by loosening or tightening the threads to adapt to samples of different lengths.

3. The metal rubber vibration damper thermomechanical fatigue testing machine according to claim 1, characterized in that: The cooling fan is installed on the testing machine frame with the air outlet facing the sample.

4. The metal rubber vibration damper thermomechanical fatigue testing machine according to claim 1, characterized in that: The upper water jacket and the lower water jacket are connected to the water tank through water pipes. When heating, the upper specimen support system is cooled by water cooling circulation to prevent other components of the testing machine from being damaged by excessive temperatures during the heating process.

5. The metal rubber vibration damper thermomechanical fatigue testing machine according to claim 1, characterized in that: The stepper motor in the resistance furnace motion control system of the metal rubber vibration damper thermomechanical fatigue testing machine is connected to and controlled by the PLC in the control system.

6. The metal rubber vibration damper thermomechanical fatigue testing machine according to claim 1, characterized in that: The cooling fan in the resistance furnace heating and cooling system of the metal rubber vibration damper thermal mechanical fatigue testing machine is connected to and controlled by the PLC in the control system. The temperature of the resistance furnace is controlled by the temperature control box, and the temperature control box is controlled by the control system.

7. The metal rubber vibration damper thermomechanical fatigue testing machine according to claim 1, characterized in that: The in-axis temperature sensor in the support and measurement system of the metal rubber shock absorber thermomechanical fatigue testing machine is installed inside the upper specimen holder and is connected to and controlled by the control system. The force sensor in the measurement system is also connected to the control system. The high-temperature extensometer can be used to monitor the height change of the metal rubber shock absorber, reflecting its deformation during heating and cooling.

8. The metal rubber vibration damper thermomechanical fatigue testing machine according to claim 1, characterized in that: The control system of the metal rubber vibration damper thermomechanical fatigue testing machine includes power switches that control each component. The PLC is connected to the industrial computer and is controlled by the fatigue test application program in the industrial computer. The touch screen displays the operating status of the fatigue test, including operating speed, sample heating temperature, holding time, cooling temperature, cooling time, and number of runs.

9. An experimental method for a metal rubber shock absorber thermal mechanical fatigue testing machine, characterized in that A metal rubber vibration damper thermomechanical fatigue testing machine according to any one of claims 1 to 8 is used: a resistance furnace is used to heat the metal rubber vibration damper sample; a motor-ball screw is used to change the position of the resistance furnace to achieve thermal cycling; (1) The control system controls the motor to rotate, causing the screw to rotate, and the screw nut drives the resistance furnace to move, heating the metal rubber shock absorber sample; (2) When the temperature reaches the specified temperature, keep it warm for 5 minutes; then, raise the heating furnace to expose the metal rubber shock absorber sample, and at the same time, the cooling fan rotates to quickly cool the sample; (3) When the temperature drops to room temperature, the heating furnace descends and continues heating, completing a thermal cycle; (4) The metal rubber shock absorber specimen is loaded by an electric cylinder and subjected to a constant load axial force.

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