Slow stretching and fatigue test all-in-one machine with environmental box

Abstract

The utility model discloses a slow stretching and fatigue testing all-in-one machine with an environmental box, and belongs to the technical field of material mechanical property testing equipment. The all-in-one machine comprises a static loading module, a dynamic loading module, a host frame and an environment box. The static loading module is composed of an anti-explosion motor set, a synchronous transmission pair, a static loading lead screw pair and a static loading movable cross beam. The dynamic loading module is composed of a servo actuator, a hydraulic accessory, a servo valve, a dynamic loading transmission shaft and a dynamic loading connecting plate. The center of the adapter plate is fixed with the loading rod, and the circumference of the adapter plate is connected and switched with the dynamic and static loading modules through bolts; therefore, loading of dynamic and static functions of the equipment with the environmental box can be realized, so that a high-frequency fatigue test or a slow tensile test of a material is completed. According to the utility model, a movable loading mechanism, a static loading mechanism and a control system are integrated on one testing machine, so that the economic and time costs are effectively reduced while various test loading requirements are met, and the testing machine is simple, rapid and convenient for system control.

Description

Technical Field

[0001] This utility model relates to the technical field of material mechanical property testing equipment, specifically to an integrated machine for slow tensile and fatigue testing with an environmental chamber. Background Technology

[0002] Materials are affected by environmental factors such as temperature, pressure, and corrosion under real service conditions, causing varying degrees of change in their mechanical properties. Therefore, it is necessary to obtain in-situ test data of materials under conditions that simulate real service conditions. Matching environmental chambers with existing testing machines to perform slow strain rate tensile tests, fatigue life tests, and fatigue crack propagation rate tests on materials under special environments such as different temperatures, pressures, humidity levels, and corrosive media is crucial for comprehensively assessing the reliability and service life of materials.

[0003] Currently, to meet the requirements for testing the mechanical properties of materials, two pieces of equipment are needed: a tensile testing machine and a fatigue testing machine. Two environmental chambers also need to be fabricated. However, environmental chambers usually require the use of corrosion-resistant, high-pressure-resistant, and hydrogen-embrittle-resistant metal materials. These metal materials are expensive and difficult to fabricate, which greatly increases the testing cost. If an environmental chamber is switched between the two testing machines, it needs to be repositioned and installed, which affects the testing accuracy. The constant disassembly and reassembly can also easily damage the equipment. Moreover, the workload is large, the time cost is high, and the heavy equipment also poses certain safety hazards. Utility Model Content

[0004] The purpose of this invention is to provide an integrated testing machine that can perform slow tensile testing and high-frequency fatigue testing of materials under special conditions, while simultaneously meeting the requirements of low strain rate for slow strain rate tensile testing and fatigue life testing.

[0005] To solve the technical problem, the technical solution adopted by this utility model is: an integrated machine for slow tensile and fatigue testing with an environmental chamber, the integrated machine including a static loading module, a dynamic loading module, a main frame and an environmental chamber;

[0006] The main frame includes a load-bearing fixed beam, supporting columns, a fixed platform, and a testing machine frame. The load-bearing fixed beam and the fixed platform are fixedly connected by several supporting columns. The fixed platform is set on the testing machine frame, and the load-bearing fixed beam is connected to the environmental chamber.

[0007] In the environmental chamber, the chamber body is connected to the environmental chamber sealing plug by bolts, and one end of the environmental chamber is set on the load-bearing fixed crossbeam;

[0008] The integrated machine adopts an upper environmental box or a lower environmental box. In the upper environmental box, the environmental box is set above the main frame, and the environmental box sealing plug is fixed to the load-bearing fixed beam by the box body crossbeam fixing bolts. In the lower environmental box, the environmental box is set below the main frame, and the end of the environmental box cylinder is placed on the load-bearing fixed beam.

[0009] The all-in-one machine includes dynamic loading mode and static loading mode: the center of the adapter plate is machined with a threaded hole to connect the loading rod, and through holes are machined in the circumferential direction. It is connected to the static loading moving crossbeam or the dynamic loading connecting plate by bolts to realize the switching between static loading mode and dynamic loading mode.

[0010] The static loading module includes an explosion-proof motor unit, a synchronous transmission pair, two static loading screw pairs, and a static loading moving crossbeam. The static loading mode is as follows: the explosion-proof motor unit is installed and fixed outside the testing machine frame and connected to the bottom of one of the static loading screw pairs via a reducer; the synchronous transmission pair connects the left and right static loading screw pairs, enabling them to rotate synchronously; the static loading moving crossbeam is connected to the static loading screw pairs via a ball screw structure; the static loading moving crossbeam is fixed to a transfer plate, which connects to one end of a loading rod, and the other end of the loading rod, which passes through the environmental chamber sealing plug and is placed inside the environmental chamber, is connected to the sample clamp.

[0011] The dynamic loading module includes a servo actuator, hydraulic accessories, servo valve, dynamic loading transmission shaft and dynamic loading connection plate, and the environmental chamber base is fixed to the load-bearing fixed crossbeam by bolts;

[0012] The dynamic loading mode is as follows: the servo actuator is installed inside the frame of the testing machine and connected to an external oil source; the servo actuator, hydraulic accessories and servo valve are the power source of the dynamic loading module and apply the generated power to the dynamic loading drive shaft; the dynamic loading connecting plate is fixedly connected to the upper part of the dynamic loading drive shaft, the dynamic loading connecting plate is fixedly connected to the adapter plate, the adapter plate is connected to one end of the loading rod, and the other end of the loading rod, which passes through the environmental chamber sealing plug and is placed in the environmental chamber, is connected to the sample clamp.

[0013] This invention offers the following advantages: It integrates two sets of loading mechanisms (one dynamic, one static) and control systems onto a single testing machine. By simply switching between the control adapter plate and the static moving crossbeam and dynamic loading connection plate, dynamic and static loading functions can be applied to the environmental chamber equipment, thus completing fatigue tests or slow tensile tests on materials. While meeting various test control accuracy requirements, static tests are performed by the static loading module, and dynamic tests by the dynamic loading module. This clear division of labor simplifies operation, reduces the functional requirements of each module, facilitates system control, and effectively reduces economic and time costs. Furthermore, considering the different sizes and weights of various environmental chambers, this invention provides two layouts: a top-mounted layout for lighter environmental chambers and a bottom-mounted layout for heavier ones. This rational layout facilitates daily operation and maintenance. Attached Figure Description

[0014] Figure 1 This is a diagram of a dynamic loading structure (environmental chamber on top) for an integrated machine for slow tensile and fatigue testing with an environmental chamber.

[0015] Figure 2 This is a diagram of a dynamic loading structure (environmental chamber at the bottom) for an integrated machine for slow tensile and fatigue testing with an environmental chamber.

[0016] Figure 3 This is a diagram of the static loading structure (environmental chamber on top) of an integrated machine for slow tensile and fatigue testing with an environmental chamber.

[0017] Figure 4 This is a diagram of the static loading structure (environmental chamber at the bottom) of an integrated machine for slow tensile and fatigue testing with an environmental chamber.

[0018] In the diagram: 1. Environmental chamber cylinder, 2. Bolt, 3. Environmental chamber sealing plug, 4. Support column, 5. Box body crossbeam fixing bolt, 6. Load-bearing fixed crossbeam, 7. Adapter plate, 8. Fixed platform, 9. Explosion-proof motor, 10. Testing machine frame, 11. Servo actuator, 12. Hydraulic accessory, 13. Servo valve, 14. Synchronous transmission pair, 15. Dynamic loading transmission shaft, 16. Static loading moving crossbeam, 17. Dynamic loading connecting plate, 18. Hex socket head cap screw, 19. Static loading lead screw pair, 20. Loading rod. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 and Figure 2 The diagrams show the dynamic loading structure of the integrated machine for slow tensile and high-frequency fatigue testing when the environmental chamber is placed on top and bottom, respectively. Figure 3 and Figure 4 The static loading structure diagrams of the integrated machine for slow tensile and high-frequency fatigue testing are shown for the environmental chambers with the top and bottom positions, respectively. Example

[0021] Figure 1 The figure shows a dynamic loading mode of an integrated environmental chamber. The main frame includes a load-bearing fixed beam 6, a support column 4, a fixed platform 8, and a testing machine frame 10. There are four support columns 4, which are connected to the load-bearing fixed beam 6 and the fixed platform 8 in a U-shape.

[0022] The environmental chamber includes an environmental chamber cylinder 1 and an environmental chamber sealing plug 3; the environmental chamber cylinder 1 and the environmental chamber sealing plug 3 are connected by bolts 2 after being assembled; the environmental chamber sealing plug 3 is connected to the load-bearing fixed beam 6 by the box body crossbeam fixing bolts 5.

[0023] The dynamic loading module of the integrated machine includes a servo actuator 11, a hydraulic accessory 12, a servo valve 13, a dynamic loading drive shaft 15, and a dynamic loading connecting plate 17. The servo actuator 11 is installed inside the testing machine frame 10 and connected to an external oil source. The servo actuator 11, hydraulic accessory 12, and servo valve 13 work together to form the power source of the dynamic loading module, providing power to the connected dynamic loading drive shaft 15. The end of the dynamic loading drive shaft 15, after passing through the static moving crossbeam 16, is connected to the central threaded hole of the dynamic loading connecting plate 17. Simultaneously, the dynamic loading connecting plate 17 is connected to the adapter plate 7 via hexagonal socket bolts 18. The adapter plate 7 connects to the sample via a loading rod 20. Threaded holes are machined at both ends of the loading rod 20 and pass through the central hole of the environmental chamber sealing plug 3. One end connects to the sample clamp inside the environmental chamber, and the other end connects to the central threaded hole of the adapter plate 7. Example

[0024] Figure 2 The figure shows a dynamic loading mode of a bottom-mounted environmental chamber integrated machine. The main frame includes a load-bearing fixed crossbeam 6, a support column 4, a fixed platform 8, and a testing machine frame 10. There are four support columns 4 in total, which are connected to the load-bearing fixed crossbeam 6 and the fixed platform 8 in a U-shape.

[0025] The environmental chamber includes an environmental chamber cylinder 1 and an environmental chamber sealing plug 3; the supporting and fixing beam 6 is placed on the ground, and the top of the environmental chamber cylinder 1 is placed on the supporting and fixing beam 6, with the environmental chamber sealing plug 3 facing upward.

[0026] The dynamic loading module of the integrated machine includes a servo actuator 11, a hydraulic accessory 12, a servo valve 13, a dynamic loading drive shaft 15, and a dynamic loading connecting plate 17. The servo actuator 11 is installed inside the testing machine frame 10 and connected to an external oil source. The servo actuator 11, hydraulic accessory 12, and servo valve 13 work together to form the power source of the dynamic loading module, providing power to the connected dynamic loading drive shaft 15. The end of the dynamic loading drive shaft 15, after passing through the static moving crossbeam 16, is connected to the central threaded hole of the dynamic loading connecting plate 17. Simultaneously, the dynamic loading connecting plate 17 is connected to the adapter plate 7 via hexagonal socket bolts 18. The adapter plate 7 connects to the sample via a loading rod 20. Threaded holes are machined at both ends of the loading rod 20 and pass through the central hole of the environmental chamber sealing plug 3. One end connects to the sample clamp inside the environmental chamber, and the other end connects to the central threaded hole of the adapter plate 7. Example

[0027] Figure 3 The figure shows a static loading mode of an integrated environmental chamber. The main frame includes a load-bearing fixed beam 6, a support column 4, a fixed platform 8, and a testing machine frame 10. There are four support columns 4, which are connected to the load-bearing fixed beam 6 and the fixed platform 8 in a U-shape.

[0028] The environmental chamber includes an environmental chamber cylinder 1 and an environmental chamber sealing plug 3; the environmental chamber cylinder 1 and the environmental chamber sealing plug 3 are connected by bolts 2 after being assembled; the environmental chamber sealing plug 3 is connected to the load-bearing fixed beam 6 by the box body crossbeam fixing bolts 5.

[0029] The static loading module of the integrated machine includes an explosion-proof motor assembly 9, a synchronous transmission pair 14, a static loading lead screw pair 19, and a static loading moving crossbeam 16. The explosion-proof motor assembly 9 is installed outside the testing machine frame 10 and is connected to one of the static loading lead screw pairs 19 via a high-precision reducer. The synchronous transmission pair 14 connects the left and right static loading lead screw pairs 19, enabling them to rotate synchronously. The static loading lead screw pair 19 and the static loading moving crossbeam 16 are connected via a ball screw structure. The static loading moving crossbeam 16 is then fixedly connected to the adapter plate 7 via hexagon socket head cap bolts 18, and the loading rod 20 is connected to the central threaded hole of the adapter plate 7. Threaded holes are machined at both ends of the loading rod 20 and pass through the central hole of the environmental chamber sealing plug 3. One end is connected to the sample clamp inside the environmental chamber, and the other end is connected to the central threaded hole of the adapter plate 7. Example

[0030] Figure 4 The figure shows a static loading mode of a bottom-mounted environmental chamber integrated machine. The main frame includes a load-bearing fixed crossbeam 6, a support column 4, a fixed platform 8, and a testing machine frame 10. There are four support columns 4 in total, which are connected to the load-bearing fixed crossbeam 6 and the fixed platform 8 in a U-shape.

[0031] The environmental chamber includes an environmental chamber cylinder 1 and an environmental chamber sealing plug 3; the supporting and fixing beam 6 is placed on the ground, and the top of the environmental chamber cylinder 1 is placed on the supporting and fixing beam 6, with the environmental chamber sealing plug 3 facing upward.

[0032] The static loading module of the integrated machine includes an explosion-proof motor assembly 9, a synchronous transmission pair 14, a static loading lead screw pair 19, and a static loading moving crossbeam 16. The explosion-proof motor assembly 9 is installed outside the testing machine frame 10 and is connected to one of the static loading lead screw pairs 19 via a high-precision reducer. The synchronous transmission pair 14 connects the left and right static loading lead screw pairs 19, enabling them to rotate synchronously. The static loading lead screw pair 19 and the static loading moving crossbeam 16 are connected via a ball screw structure. The static loading moving crossbeam 16 is then fixedly connected to the adapter plate 7 via hexagon socket head cap bolts 18, and the loading rod 20 is connected to the central threaded hole of the adapter plate 7. Threaded holes are machined at both ends of the loading rod 20 and pass through the central hole of the environmental chamber sealing plug 3. One end is connected to the sample clamp inside the environmental chamber, and the other end is connected to the central threaded hole of the adapter plate 7.

[0033] Specific operating steps for using this utility model:

[0034] One end of the environmental chamber cylinder 1 is closed and the other end is open. The open end is matched with the environmental chamber sealing plug 3 and fixed by bolt 2.

[0035] When the environmental chamber is placed on top (Examples 1 and 3), the environmental chamber sealing plug 3 is vertically downward and fixed to the load-bearing fixed beam 6 of the testing machine by the chamber fixing bolts 5. The loading rod 20 is passed through the center hole of the environmental chamber sealing plug 3. The top end of the loading rod is connected to the sample clamp inside the environmental chamber, and the bottom end is fixed to the center threaded hole of the adapter plate 7, thus completing the installation of the environmental chamber placed on top.

[0036] When the environmental chamber is placed at the bottom (Examples 2 and 4), the supporting and fixing beam 6 is placed on the ground, the top of the environmental chamber cylinder is placed on the supporting and fixing beam 6, and the environmental chamber sealing plug 3 is facing upward; the loading rod 20 is passed through the center hole of the environmental chamber sealing plug 3, the top of the loading rod is connected to the sample clamp inside the environmental chamber, and the bottom is fixed to the center threaded hole of the adapter plate 7, thus completing the installation of the environmental chamber at the top.

[0037] ② Connect the dynamic loading connecting plate 17 to the dynamic loading drive shaft 15 through the central threaded hole. Adjust the position of the dynamic loading drive shaft 15 using the controller so that the dynamic loading connecting plate 17 contacts the adapter plate 7. Install the hex socket head cap screws 18 to connect the dynamic loading connecting plate 17 and the adapter plate 7, completing the installation of the dynamic loading module. The servo valve 13 executes the controller's command to control the oil supply output mode, thereby controlling the hydraulic power output by the hydraulic accessory 12, which in turn drives the servo actuator 11 to drive the dynamic loading drive shaft 15 to achieve unidirectional linear or reciprocating motion according to the specified loading mode. Since the loading rod 20 is connected to the dynamic loading drive shaft 15 through the dynamic loading connecting plate 17 and the adapter plate 7, the loading force can be transmitted to the loading rod and the sample in the environmental chamber to complete dynamic tests such as fatigue.

[0038] ③ Remove the hex socket head cap screws 18 to separate the dynamic loading connecting plate 17 from the adapter plate 7. Remove the dynamic loading connecting plate 17 and adjust the position of the dynamic loading drive shaft 15 using the controller to disconnect the drive shaft from the loading rod. Adjust the position of the static loading moving crossbeam 16 using the controller so that it contacts the adapter plate 7. Install the hex socket head cap screws 18 to connect and secure the static loading moving crossbeam 16 and the adapter plate 7, completing the installation of the static loading module.

[0039] ④ Start the explosion-proof motor unit 9. Through the synchronous transmission pair 14, the left and right static loading screw pairs 19 rotate at the same speed. The speed of the static loading screw pairs 19 is controlled by the built-in high-precision reducer to meet the requirements of the slow strain rate tensile test. Under the action of the ball screw, the circular motion of the static loading screw pairs 19 is converted into the vertical linear motion of the static loading moving beam 16. Since the static loading moving beam 16 and the loading rod 20 are connected by the adapter plate 7, the loading rod 20 can be driven to achieve vertical linear motion, thereby transferring the loading force to the sample in the environmental chamber and completing static tests such as slow strain rate tensile tests.

[0040] An integrated slow tensile and fatigue testing machine with an environmental chamber simultaneously meets the requirements of low strain rate tensile testing and fatigue life testing. The above is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model.

[0041] For example, this utility model does not limit what kind of transmission structure the static loading module uses to realize the circular motion of the explosion-proof motor unit into the linear motion of the static loading moving crossbeam. The synchronous transmission pair can be replaced by a worm gear or other structure.

[0042] For example, this utility model does not limit the location of the explosion-proof motor unit. For instance, if there is enough space inside the testing machine frame and it does not affect the realization of the dynamic and static loading functions, it can also be installed inside the testing machine frame.

[0043] For example, this utility model is not limited to any particular application scenario and is applicable regardless of whether an environmental chamber is present or not.

[0044] Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model shall be included within the protection scope of this utility model.

Claims

1. A combined slow tensile and fatigue testing machine with an environmental chamber, characterized in that: The all-in-one machine comprises a static loading module, a dynamic loading module, a main frame and an environmental box; The main frame comprises a bearing fixed beam (6), support columns (4), a fixed platform (8) and a testing machine frame (10), the bearing fixed beam (6) and the fixed platform (8) are fixedly connected through the support columns (4), the fixed platform (8) is arranged on the testing machine frame (10), and the bearing fixed beam (6) is connected with the environmental box; In the environmental box, the environmental box cylinder (1) is connected with the environmental box sealing plug (3) through bolts (2), and one end of the environmental box is arranged on the bearing fixed beam (6); The all-in-one machine adopts an upper environmental box or a lower environmental box, the environmental box is arranged above the main frame in the upper environmental box, the environmental box sealing plug (3) is fixed on the bearing fixed beam (6) through the box beam fixing bolt (5), and the environmental box is arranged below the main frame in the lower environmental box, and the end of the environmental box cylinder (1) is arranged on the bearing fixed beam (6); The all-in-one machine comprises a dynamic loading mode and a static loading mode: a threaded hole is formed in the center of the adapter disc (7) and used to connect the loading rod (20), a through hole is formed in the circumferential direction, the adapter disc (7) is connected with the static loading moving beam (16) or the dynamic loading connecting plate (17) through bolts, and the static loading mode or the dynamic loading mode is switched; The static loading module comprises an explosion-proof motor set (9), a synchronous transmission pair (14), two static loading screw pairs (19) and a static loading moving beam (16); in the static loading mode, the explosion-proof motor set (9) is fixedly arranged outside the testing machine frame (10) and connected with the bottom of one of the static loading screw pairs (19) through a speed reducer; the synchronous transmission pair (14) is connected with the left and right static loading screw pairs (19), so that the static loading screw pairs (19) can rotate synchronously; the static loading moving beam (16) is connected with the static loading screw pairs (19) through a ball screw structure; the static loading moving beam (16) is fixed with the adapter disc (7), one end of the loading rod (20) connected with the adapter disc (7) is arranged in the environmental box through the environmental box sealing plug (3), and the other end of the loading rod (20) is connected with a sample clamp; The dynamic loading module comprises a servo actuator (11), a hydraulic accessory (12), a servo valve (13), a dynamic loading transmission shaft (15) and a dynamic loading connecting plate (17), and the environmental box base is fixed on the bearing fixed beam through bolts; In the dynamic loading mode, the servo actuator (11) is arranged inside the testing machine frame (10) and connected with an external oil source; the servo actuator (11), the hydraulic accessory (12) and the servo valve (13) are power sources of the dynamic loading module and apply power generated thereby to the dynamic loading transmission shaft (15); the dynamic loading connecting plate (17) is fixedly connected with the upper part of the dynamic loading transmission shaft (15), the dynamic loading connecting plate (17) is fixedly connected with the adapter disc (7), one end of the loading rod (20) connected with the adapter disc (7) is arranged in the environmental box through the environmental box sealing plug (3), and the other end of the loading rod (20) is connected with a sample clamp.

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