A flying pendulum impact testing machine

Abstract

The utility model relates to pendulum impact testing machine technical field, and disclose a kind of anti-springing pendulum impact testing machine, including anvil, the both sides of anvil are respectively fixedly arranged with mounting seat, the threaded column of being fixedly installed on the mounting seat of two sides is all equipped, this anti-springing pendulum impact testing machine, the second intercepting arm that first intercepting arm is installed with through connecting shaft, so when the transverse stress that workpiece is generated when carrying out impact test triggers pressure sensor below anvil, signal is controlled by PLC, so that the drive cylinder controls second intercepting arm to complete rotation in 8ms to close with first intercepting arm, to prevent debris from first intercepting arm and second intercepting arm and rush out, then the ceramic layer that first intercepting arm and second intercepting arm are provided can better to some hard particles embed and retard, then buffer layer can provide better buffering effect, so this can better prevent danger to staff when carrying out test.

Description

Technical Field

[0001] This utility model relates to the technical field of pendulum impact testing machines, specifically an anti-bounce pendulum impact testing machine. Background Technology

[0002] The pendulum impact test is a core method for evaluating the impact resistance of materials and is widely used in metallurgy, construction, rail transportation and other fields.

[0003] As material strength increases and testing standards become more stringent, impact energy has increased from 300J in the early days to over 1000J today. The kinetic energy release when the specimen breaks has increased exponentially. Although current standards such as ASTM E23 and ISO 148 specify specimen size and fixture requirements, they do not mandate anti-blowout measures. In the past five years, laboratories worldwide have reported 23 workplace accidents in which H-beam specimens broke and penetrated the protective cover. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides an anti-bounce pendulum impact testing machine to solve the problem mentioned in the background technology. As material strength increases and testing standards become more stringent, impact energy has increased from 300J in the early days to over 1000J today. The kinetic energy release when the specimen breaks has increased exponentially. Although current standards such as ASTM E23 and ISO 148 specify specimen size and fixture requirements, they do not mandate anti-bounce measures. In the past five years, laboratories worldwide have reported 23 workplace accidents where I-beam specimens broke and penetrated the protective cover.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an anti-bounce pendulum impact testing machine, including an anvil, with mounting seats fixedly provided on both sides of the anvil, and threaded columns fixedly installed on both sides of the mounting seats; The mounting bases on both sides of the anvil are provided with first intercepting arms. The bottom of the first intercepting arm is provided with a positioning hole that is adapted to the threaded post. The threaded post passes through the positioning hole and detachably fixes the first intercepting arm to the mounting base. The front end of the first intercepting arm is hinged to a connecting door, and the connecting door is equipped with a door switch; The upper end of the first interceptor arm is rotatably connected to a second interceptor arm via a connecting shaft, and the connecting shaft is connected to a drive cylinder for driving the second interceptor arm to rotate around the connecting shaft.

[0006] Preferably, a blocking layer, a buffer layer, and a ceramic layer are sequentially stacked on the inner surfaces of the first and second intercepting arms.

[0007] Preferably, an upwardly extending connecting frame is fixedly installed on the anvil, and a release device is provided at the top of the connecting frame, with a pin provided on the release device; The connecting frame is also equipped with a display panel, and the display panel is equipped with an indicator needle; The front end of the connecting frame is rotatably mounted with a connecting rod, and the bottom of the connecting rod is fixedly mounted with a pendulum. The connecting rod is provided with a hook that can engage or disengage with a pin on the releasing device.

[0008] Preferably, a permanent magnet is embedded in the head of the pendulum, and a copper damping ring is fixedly installed below the permanent magnet at the head of the pendulum.

[0009] Preferably, a sample stage is provided on the top of the anvil, and a hydraulic clamp for holding the sample is provided inside the sample stage. The bottom of the anvil is equipped with a pressure sensor associated with the sample stage, and the surface of the sample stage is equipped with a magnetic plate.

[0010] Preferably, the ceramic layer is composed of a ceramic composite plate, and the buffer layer is composed of polyurethane material.

[0011] Preferably, the total thickness of the composite layer of the barrier layer, buffer layer and ceramic layer is 10 mm.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. This anti-bounce pendulum impact testing machine has a second intercepting arm mounted on the first intercepting arm via a connecting shaft. Therefore, when the workpiece is undergoing an impact test, the lateral stress generated triggers the pressure sensor below the anvil. The signal is controlled by the PLC, which causes the drive cylinder to control the second intercepting arm to rotate within 8ms to close with the first intercepting arm, thereby preventing debris from being ejected from the first and second intercepting arms. Furthermore, the ceramic layer set inside the first and second intercepting arms can effectively embed and impede some hard particles, and the buffer layer can provide a good buffering effect. Therefore, this can effectively prevent danger to the staff during the test.

[0013] 2. This anti-bounce pendulum impact testing machine has a hook installed on the connecting rod that connects to the top pin of the release device. This allows the connecting rod to effectively restrain or disengage the pendulum. Because a permanent magnet is installed at the head of the pendulum, when the pendulum falls to its lowest point, it forms a closed magnetic field with the magnetic plate of the sample stage, providing an additional 150 N·m of fragment attraction torque. This reduces the fragment escape velocity by 42%. Furthermore, a copper damping ring is installed below the permanent magnet, which effectively reduces eddy currents and heat generation inside the magnetic plate, thus protecting the magnetic plate. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the anti-bounce pendulum impact testing machine of this utility model; Figure 2 This is a front view structural diagram of the anti-bounce pendulum impact testing machine of this utility model; Figure 3 This is a schematic diagram of the connecting frame and related structures of this utility model; Figure 4 This is a schematic diagram of the first interceptor arm and its related structures of the present invention; Figure 5 This is a schematic diagram of the barrier layer and related structures of this utility model.

[0015] In the diagram: 1. Anvil; 2. Mounting base; 3. Threaded post; 4. First intercepting arm; 5. Positioning hole; 6. Connecting door; 7. Second intercepting arm; 8. Connecting shaft; 9. Drive cylinder; 10. Blocking layer; 11. Buffer layer; 12. Ceramic layer; 13. Connecting frame; 14. Release device; 15. Display panel; 16. Indicator needle; 17. Connecting rod; 18. Pendulum; 19. Hydraulic clamp. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Example 1: Please refer to Figures 1-5. An anti-bounce pendulum impact testing machine includes an anvil 1. Mounting seats 2 are fixedly provided on both sides of the anvil 1, and threaded columns 3 are fixedly installed on both sides of the mounting seats 2. The mounting bases 2 on both sides of the anvil 1 are provided with first intercepting arms 4. The bottom of the first intercepting arm 4 is provided with a positioning hole 5 that is adapted to the threaded post 3. The threaded post 3 passes through the positioning hole 5 and detachably fixes the first intercepting arm 4 to the mounting base 2. The front end of the first intercepting arm 4 is hinged to a connecting door 6, and the connecting door 6 is equipped with a door switch; The upper end of the first intercepting arm 4 is rotatably connected to the second intercepting arm 7 via a connecting shaft 8. The connecting shaft 8 is connected to a driving cylinder 9 for driving the second intercepting arm 7 to rotate around the connecting shaft 8.

[0018] Specifically, the threaded posts 3 installed on both sides of the anvil 1 are inserted into the positioning holes 5 at the bottom of the first intercepting arm 4. Then, the operator installs the threaded sleeve onto the threaded post 3, thus installing the first intercepting arm 4 and facilitating its disassembly for subsequent maintenance. The front end of the first intercepting arm 4 is connected to a connecting door 6 via a hinge, allowing the operator to open the door and remove larger workpiece debris from inside the first intercepting arm 4. The second intercepting arm 7 is then installed on the first intercepting arm 4 via a connecting shaft 8. When the workpiece undergoes an impact test, the lateral stress triggers the pressure sensor below the anvil 1. The signal, controlled by the PLC, causes the drive cylinder 9 to rotate the second intercepting arm 7 within 8ms to close it with the first intercepting arm 4, preventing debris from being ejected from both the first and second intercepting arms 4.

[0019] In the embodiment: a blocking layer 10, a buffer layer 11 and a ceramic layer 12 are sequentially stacked on the inner surfaces of the first intercepting arm 4 and the second intercepting arm 7.

[0020] Specifically, the blocking layer 10 set in the first intercepting arm 4 and the second intercepting arm 7 can effectively block the debris of the workpiece, the buffer layer 11 can effectively buffer the impact force of the workpiece, and the ceramic layer 12 can effectively embed and block some hard particles generated during the impact of the workpiece.

[0021] In this embodiment: the ceramic layer 12 is composed of a ceramic composite plate, and the buffer layer 11 is composed of polyurethane material.

[0022] Specifically, the ceramic layer 12 is made of ceramic composite material, which can effectively embed and impede some hard particles. The buffer layer 11 is made of polyurethane material, which is a high-molecular material with excellent mechanical properties formed by polycondensation reaction of polyol and polyisocyanate. It has strong plasticity and therefore has a good buffering effect. The buffer layer 11 can be replaced with an aramid fiber / nitrile rubber laminate structure, which is suitable for workers in low-temperature test environments.

[0023] In this embodiment, the total thickness of the composite of the barrier layer 10, the buffer layer 11, and the ceramic layer 12 is 10 mm.

[0024] Specifically, the total thickness of the composite of the barrier layer 10, the buffer layer 11, and the ceramic layer 12 is 10mm. This can effectively reduce its volume and weight, while also providing better protection for the staff.

[0025] In this embodiment: the controller is an existing structure, and the control circuit can be implemented by simple programming by those skilled in the art. It is common knowledge in the art, and it is only used without modification. Therefore, the control method and circuit connection will not be described in detail.

[0026] Working principle: Example 2: Please refer to Figures 1-5. In a pendulum impact testing machine for preventing bouncing, an anvil 1 is fixedly installed with an upwardly extending connecting frame 13. The top of the connecting frame 13 is provided with a release device 14, and a pin is provided on the release device 14. The connecting frame 13 is also provided with a display panel 15, and the display panel 15 is provided with an indicator needle 16; The front end of the connecting frame 13 is rotatably mounted with a connecting rod 17, and the bottom of the connecting rod 17 is fixedly mounted with a pendulum 18. The connecting rod 17 is provided with a hook that can engage or disengage with the pin on the release device 14.

[0027] Specifically, the display panel 15 can clearly show the angle of swing of the pendulum 18 driven by the connecting rod 17, while the indicator needle 16 allows the staff to better observe the angle on the display screen. The pendulum 18 installed at the bottom of the connecting rod 17 can be used for impact testing. Since the connecting rod 17 is equipped with a hook that is connected to the top pin of the release device 14, the connecting rod 17 can effectively restrict or disengage the pendulum 18 driven by the pendulum 18.

[0028] In this embodiment: a permanent magnet is embedded in the head of the pendulum 18, and a copper damping ring is fixedly installed below the permanent magnet at the head of the pendulum 18.

[0029] Specifically, because a permanent magnet is installed at the head of the pendulum 18, when the pendulum 18 falls to its lowest point, it forms a closed magnetic field with the magnetic plate of the sample stage, providing an additional 150 N·m of fragment attraction torque, which can reduce the escape velocity of the fragments by 42%. Then, a copper damping ring is installed below the permanent magnet, which effectively reduces the eddy currents and heat generated inside the magnetic plate, thereby protecting the magnetic plate.

[0030] In this embodiment: a sample stage is provided on the top of the anvil 1, and a hydraulic clamp 19 for holding the sample is provided inside the sample stage. The bottom of the anvil 1 is equipped with a pressure sensor associated with the sample stage, and the surface of the sample stage is equipped with a magnetic plate.

[0031] Specifically, the hydraulic clamp 19 installed in the sample stage at the top of the anvil 1 can better clamp the I-shaped workpiece, so that the I-shaped workpiece can be kept stable during the impact test. Then, a pressure sensor is installed at the bottom of the anvil 1. Therefore, when the lateral stress generated by the I-shaped workpiece during the impact test triggers the pressure sensor below the anvil 1, the signal is controlled by the PLC, which will cause the drive cylinder 9 to control the second intercepting arm 7 to complete the rotation within 8ms to close with the first intercepting arm 4.

[0032] Working principle: The connecting rod 17 is equipped with a hook that connects to the top pin of the release device 14. This allows the connecting rod 17 to effectively restrict or disengage the pendulum 18. Since the head of the pendulum 18 is equipped with a permanent magnet, when the pendulum 18 falls to its lowest point, it forms a closed magnetic field with the magnetic plate of the sample stage, providing an additional 150 N·m of fragment adsorption torque. This reduces the escape velocity of the fragments by 42%. Furthermore, a copper damping ring is installed below the permanent magnet, which effectively reduces the eddy currents and heat generated inside the magnetic plate, thereby protecting the magnetic plate.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An anti-bounce pendulum impact testing machine, comprising an anvil (1), characterized in that: Mounting seats (2) are fixedly installed on both sides of the anvil (1), and threaded columns (3) are fixedly installed on both sides of the mounting seats (2). The mounting bases (2) on both sides of the anvil (1) are provided with first intercepting arms (4). The bottom of the first intercepting arm (4) is provided with a positioning hole (5) that is compatible with the threaded post (3). The threaded post (3) passes through the positioning hole (5) and detachably fixes the first intercepting arm (4) to the mounting base (2). The front end of the first intercepting arm (4) is hinged to a connecting door (6), and a door switch is provided on the connecting door (6); The upper end of the first intercepting arm (4) is rotatably connected to the second intercepting arm (7) via a connecting shaft (8), and the connecting shaft (8) is connected to a driving cylinder (9) for driving the second intercepting arm (7) to rotate around the connecting shaft (8).

2. The anti-bounce pendulum impact testing machine according to claim 1, characterized in that: On the inner surfaces of the first interceptor arm (4) and the second interceptor arm (7), a blocking layer (10), a buffer layer (11) and a ceramic layer (12) are stacked in sequence.

3. The anti-bounce pendulum impact testing machine according to claim 1, characterized in that: An upwardly extending connecting frame (13) is fixedly installed on the anvil (1), and a release device (14) is provided at the top of the connecting frame (13), and a pin is provided on the release device (14). The connecting frame (13) is also provided with a display panel (15), and the display panel (15) is provided with an indicator needle (16). The front end of the connecting frame (13) is rotatably mounted with a connecting rod (17), and the bottom of the connecting rod is fixedly mounted with a pendulum (18). The connecting rod (17) is provided with a hook that can engage or disengage with the pin on the release device (14).

4. The anti-bounce pendulum impact testing machine according to claim 3, characterized in that: The head of the pendulum (18) is fitted with a permanent magnet, and a copper damping ring is fixedly installed below the head of the pendulum (18) on the lower part of the permanent magnet.

5. The anti-bounce pendulum impact testing machine according to claim 1, characterized in that: The anvil (1) is provided with a sample stage on its top, and a hydraulic clamp (19) for holding the sample is provided inside the sample stage. The bottom of the anvil (1) is provided with a pressure sensor associated with the sample stage, and the surface of the sample stage is provided with a magnetic plate.

6. The anti-bounce pendulum impact testing machine according to claim 2, characterized in that: The ceramic layer (12) is made of ceramic composite board, and the buffer layer (11) is made of polyurethane material.

7. The anti-bounce pendulum impact testing machine according to claim 2, characterized in that: The total thickness of the combined barrier layer (10), buffer layer (11) and ceramic layer (12) is 10 mm.

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