Dual-wave impact testing machine

Abstract

The present invention relates to the technical field of impact testing machines, and particularly to a dual-wave impact testing machine. The dual-wave impact testing machine includes an impact testing machine, a positive-wave generator, a negative-wave generator, and an energy storage mechanism. One end of the pendulum is rotatably arranged on the base, and the driving mechanism is in transmission connection with the pendulum to drive the hammer head of the pendulum to rotate to a set height. The positive-wave generator is detachably arranged at the hammering station at the bottom of the workbench surface and can be triggered after being hammered to generate a positive pulse wave. The negative-wave generator is detachably and movably connected to the workbench surface, and the negative-wave generator can be triggered after the workbench surface is hammered and slides upward to generate a negative pulse wave. The hammer head can freely fall from the set height and hammer the hammering station where the positive-wave generator is not installed; or, the hammer head can hammer the positive-wave generator installed at the hammering station under the drive of the energy storage mechanism. A dual-wave impact test function is added to the impact testing machine to truly simulate the underwater explosion impact environment.

Description

Technical Field

[0001] The present invention relates to the technical field of impact testing machines, and particularly to a double-wave impact testing machine. Background Art

[0002] To study the anti-impact ability of ship structures and their equipment, the most direct method is to conduct full-scale underwater explosion impact tests on ships. However, due to reasons such as high costs, large environmental damage, and long test cycles of underwater explosion tests, impact testing machines are usually used to simulate the underwater explosion impact environment to complete the underwater explosion impact test tasks of ship equipment on the ground. In order to more accurately simulate the underwater explosion impact environment, currently, double-wave impact testing machines are used to replace traditional single-pulse impact testing machines to complete the test process. The corresponding test specifications mainly include BV043 / 85, MIL-S-901D, etc.

[0003] Existing double-wave impact testing machines mainly adopt pneumatic or hydraulic energy storage structures. The impact hammer head is driven by high-pressure gas or hydraulic energy storage to impact the workbench surface to generate the required impact waveform. Since both pneumatic energy storage and hydraulic energy storage methods require high-precision control valves to complete the energy storage action, the structures of existing double-wave impact testing machines are relatively complex, and the maintenance costs and usage costs are relatively high. Summary of the Invention

[0004] The purpose of the present invention is to provide a double-wave impact testing machine, which is designed based on the existing impact testing machine to truly simulate the underwater explosion impact environment, improve the versatility of the double-wave impact testing machine, and reduce costs.

[0005] To achieve this purpose, the technical solution adopted by the present invention is as follows:

[0006] A double-wave impact testing machine, comprising:

[0007] An impact testing machine, including a base, an anvil, a workbench surface, a pendulum hammer, and a driving mechanism. The anvil and the driving mechanism are both fixedly arranged on the base. The workbench surface is slidably arranged in the vertical direction on the upper surface of the anvil. One end of the pendulum hammer is rotatably arranged on the base. The driving mechanism is in transmission connection with the pendulum hammer to drive the hammer head of the pendulum hammer to rotate to a set height.

[0008] A positive wave generator, detachably arranged at the hammering station at the bottom of the workbench surface and capable of being triggered after being hammered to generate a positive pulse wave.

[0009] A negative wave generator, arranged on the anvil and detachably and movably connected to the workbench surface. The negative wave generator can be triggered after the workbench surface is hammered and slides upward to generate a negative pulse wave.

[0010] Energy storage mechanism, the hammer head can freely fall at the set height and strike the hammering station where the positive wave generator is not installed; or, it can strike the positive wave generator installed at the hammering station under the drive of the energy storage mechanism.

[0011] As a preferred solution, the double-wave impact testing machine further includes a braking mechanism provided on the base, and the braking mechanism can lock or release the pendulum hammer.

[0012] As a preferred solution, the impact testing machine further includes a rotating shaft, the rotating shaft is rotatably provided on the base, one end of the hammer rod of the pendulum hammer is installed on the rotating shaft, the other end of the hammer rod is connected to the hammer head, the output end of the driving mechanism is connected to the rotating shaft, and the braking mechanism can lock or release the rotating shaft.

[0013] As a preferred solution, the braking mechanism includes:

[0014] A clamping driving member provided on the base;

[0015] A brake disc fixedly sleeved on the rotating shaft;

[0016] Brake pads, the clamping driving member is in transmission connection with the two brake pads, so that the two brake pads approach each other to clamp the brake disc; or, the two brake pads move away from each other to release the brake disc.

[0017] As a preferred solution, the impact testing machine further includes an angle detector, and the angle detector is provided on the rotating shaft to detect the rotation angle of the rotating shaft.

[0018] As a preferred solution, the driving mechanism includes a driving main body and a clutch, and the pendulum hammer is selectively in transmission connection with the driving main body or the energy storage mechanism through the clutch.

[0019] As a preferred solution, the double-wave impact testing machine further includes a guide shaft, a through hole is opened in the anvil table along the vertical direction, the top end of the guide shaft is connected to the workbench surface, and the bottom end of the guide shaft slides through the through hole.

[0020] As a preferred solution, a limiting flange is provided at the bottom end of the guide shaft, and the cross-sectional area of the limiting flange is larger than the opening area of the through hole.

[0021] As a preferred solution, the double-wave impact testing machine further includes a height adjustment mechanism, and the height adjustment mechanism is provided on the anvil table and is supported and connected to the workbench surface to adjust the initial height of the workbench surface.

[0022] As a preferred solution, the dual-wave impact testing machine further includes a photoelectric sensor, which is arranged on the base and can measure the height of the workbench surface after being adjusted by the height adjustment mechanism.

[0023] The beneficial effects of the present invention are as follows:

[0024] The dual-wave impact testing machine proposed by the present invention forms a dual-wave impact testing machine by adding a positive wave generator, a negative wave generator, and an energy storage mechanism on the basis of an impact testing machine. The energy storage mechanism can increase the falling speed of the hammer head at a set height and hammer the positive wave generator, so that both the positive wave generator and the negative wave generator are triggered to generate a positive pulse wave and a negative pulse wave respectively, enabling the dual-wave impact testing machine to generate positive and negative double pulse waves that meet the requirements under a single impact excitation, so as to truly simulate the underwater explosion shock environment, thereby realizing the anti-shock performance assessment of ships and their equipment and the reliability evaluation of equipment. At the same time, the positive wave generator can also be removed from the hammering station at the bottom of the workbench surface, the negative wave generator is disconnected from the workbench surface, and the hammer head of the pendulum falls freely at the set height and hammers the hammering station at the bottom of the workbench surface to complete the impact test. The dual-wave impact testing machine proposed by the present invention adds a dual-wave impact test function on the basis of the impact test function, improves the versatility of the dual-wave impact testing machine, simplifies the overall structure, avoids the repeated construction of test equipment, and reduces the maintenance cost and use cost. Description of the Drawings

[0025] Figure 1 is a structural schematic diagram of the dual-wave impact testing machine provided by an embodiment of the present invention Figure 1 ;

[0026] Figure 2 is a structural schematic diagram of the dual-wave impact testing machine provided by an embodiment of the present invention Figure 2 。

[0027] The names and reference numerals of the components in the figure are as follows:

[0028] 1. Base; 2. Anvil; 3. Workbench surface; 4. Pendulum; 41. Hammer rod; 42. Hammer head; 5. Driving mechanism; 6. Negative wave generator; 61. Hook; 7. Braking mechanism; 71. Clamping driving part; 72. Brake disc; 73. Brake pad; 8. Rotating shaft; 9. Bracket; 10. Guide shaft; 11. Height adjustment mechanism; 12. Photoelectric sensor; 13. Vibration isolation buffer. Detailed Embodiments

[0029] To make the technical problems solved by the present invention, the technical solutions adopted, and the achieved technical effects clearer, the technical solutions of the present invention will be further described below with reference to the accompanying drawings and through specific embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Additionally, it should be noted that for the convenience of description, only the parts related to the present invention are shown in the drawings rather than all of them.

[0030] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0031] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above the", and "on the" second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below the", and "under the" second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0032] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", and "left" are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meanings.

[0033] The technical solutions of the present invention will be further described below with reference to the accompanying drawings and through specific embodiments.

[0034] Existing double-wave impact testing machines mainly adopt pneumatic or hydraulic energy storage structures. The impact hammer head is driven by high-pressure gas or hydraulic energy storage to impact the workbench surface to generate the required impact waveform. Since both pneumatic energy storage and hydraulic energy storage methods require high-precision control valves to complete the energy storage action, the structures of existing double-wave impact testing machines are relatively complex, and the maintenance cost and usage cost are relatively high.

[0035] To solve the above problems, asFigure 1 and Figure 2 As shown in Figure 2 , this embodiment provides a dual-wave impact testing machine. The dual-wave impact testing machine includes an impact testing machine, a positive-wave generator, a negative-wave generator 6, and an energy storage mechanism. The impact testing machine includes a base 1, an anvil 2, a workbench surface 3, a pendulum hammer 4, and a driving mechanism 5. The anvil 2 and the driving mechanism 5 are both fixedly arranged on the base 1. The workbench surface 3 is slidably arranged on the upper surface of the anvil 2 in the vertical direction (the up-and-down direction in the figure). One end of the pendulum hammer 4 is rotatably arranged on the base 1. The driving mechanism 5 is in transmission connection with the pendulum hammer 4 to drive the hammer head 42 of the pendulum hammer 4 to rotate to a set height. The positive-wave generator is detachably arranged at the hammering station at the bottom of the workbench surface 3 and can be triggered after being hammered to generate a positive pulse wave. The negative-wave generator 6 is arranged on the anvil 2 and is detachably and movably connected to the workbench surface 3. The negative-wave generator 6 can be triggered after the workbench surface 3 is hammered and slides upward to generate a negative pulse wave. The hammer head 42 can freely fall at the set height and hammer the hammering station where the positive-wave generator is not installed; or, the hammer head 42 can hammer the positive-wave generator installed at the hammering station under the drive of the energy storage mechanism.

[0036] In this embodiment, a dual-wave impact testing machine is formed by adding a positive-wave generator, a negative-wave generator 6, and an energy storage mechanism on the basis of an impact testing machine. The energy storage mechanism can increase the falling speed of the hammer head 42 at the set height and hammer the positive-wave generator, so that both the positive-wave generator and the negative-wave generator 6 are triggered to generate a positive pulse wave and a negative pulse wave respectively, enabling the dual-wave impact testing machine to generate positive and negative double pulse waves that meet the requirements under a single impact excitation to truly simulate the underwater explosion impact environment, thereby realizing the anti-impact performance assessment of ships and their equipment and the reliability evaluation of equipment. At the same time, the positive-wave generator can also be removed from the hammering station at the bottom of the workbench surface 3, the negative-wave generator 6 is disconnected from the workbench surface 3, and the hammer head 42 of the pendulum hammer 4 freely falls at the set height and hammers the hammering station at the bottom of the workbench surface 3 to complete the impact test. The dual-wave impact test function is added on the basis of the impact test function, improving the versatility of the dual-wave impact testing machine, simplifying the overall structure, avoiding the repeated construction of test equipment, and reducing the maintenance cost and use cost.

[0037] It should be noted that the above dual-wave impact testing machine is applicable to dual-wave impact test standards such as HJB554-2012 and BV043 / 85, and also applicable to medium-weight impact test standards such as GJB150.18-86, GJB150.18A-2009, GJB360, GB / T2423, and MIL-S-901D. The positive pulse wave generated after the positive-wave generator is triggered by being hammered is a positive half-sine pulse wave. The negative pulse wave generated after the negative-wave generator 6 is triggered is a negative half-sine pulse wave to meet the dual-wave impact test standards.

[0038] When conducting a double-wave impact test, the base 1 is placed in the test pit. The base 1 includes a housing and a vibration isolation buffer 13. The housing is a hollow housing formed by welding structural steel to improve the structural strength of the housing. According to different test requirements, concrete with different weights can also be cast in the housing to adjust the total weight of the double-wave impact testing machine. Vibration isolation buffers 13 are installed on the bottom surface and the four circumferential side surfaces of the base 1. The vibration isolation buffers 13 use composite vibration isolation rubber as the matrix and have good vibration isolation and shock absorption effects to achieve the vibration isolation effect between the double-wave impact testing machine and the surrounding environment during operation.

[0039] Furthermore, in the test pit, a grating-type safety isolation fence is also installed around the housing. Once the safety isolation fence senses that an object has passed through and entered the area near the double-wave impact testing machine, the safety isolation fence sends an alarm signal to the control unit of the double-wave impact testing machine, causing the control unit to urgently stop the test, preventing safety accidents and improving the safety of the test process. The control unit of this embodiment is mainly used to complete conventional control actions such as action control and signal acquisition and processing during the test process. Since the control unit of the double-wave impact testing machine is a prior art, the specific structure and working process of the control unit will not be elaborated further.

[0040] The pendulum hammer 4 of this embodiment includes a hammer rod 41 and a hammer head 42. One end of the hammer rod 41 is connected to the hammer head 42, and a sleeve is provided at the other end of the hammer rod 41. The sleeve is sleeved on the rotating shaft 8 so that the rotating shaft 8 drives the hammer rod 41 and the hammer head 42 to rotate in the direction shown by the arrow in the figure or in the direction opposite to the direction shown by the arrow in the figure. Specifically, the hammer head 42 is made of alloy steel, and the impact surface is heat-treated, so that the hammer head 42 has the characteristics of high surface hardness, high wear resistance, and high toughness at the core, avoiding crack damage of the hammer head 42 during hammering and improving the safety of the test process.

[0041] As Figure 1 and Figure 2 shown, the impact testing machine further includes a rotating shaft 8. The rotating shaft 8 is rotatably arranged on the base 1. One end of the hammer rod 41 of the pendulum hammer 4 is installed on the rotating shaft 8, and the other end of the hammer rod 41 is connected to the hammer head 42. The output end of the driving mechanism 5 is connected to the rotating shaft 8. Specifically, a bracket 9 is fixedly installed on the base 1, and the rotating shaft 8 is rotatably installed on the bracket 9 through bearings. The driving mechanism 5 can drive the rotating shaft 8 to rotate on the bracket 9 to drive the hammer head 42 of the pendulum hammer 4 to rise to a set height.

[0042] It should be noted that the angle range of the hammer head 42 rotating with the rotating shaft 8 is 0° to 270°. The impact testing machine further includes an angle detector which is arranged on the rotating shaft 8 to detect the rotation angle of the rotating shaft 8. The rotation angle of the pendulum 4, that is, the lifting height of the hammer head 42, is accurately measured by the angle detector. When the rotation angle of the pendulum 4 exceeds the maximum limit value (270°), the angle detector sends an alarm signal to the control unit, so that the control unit locks the pendulum 4 through the braking mechanism 7 (such as Figure 1 as shown) to avoid danger and improve the safety of the test process.

[0043] Specifically, the driving mechanism 5 includes a driving main body and a clutch. The pendulum 4 is selectively connected to the driving main body or the energy storage mechanism through the clutch. The driving main body of this embodiment is a hydraulic motor, which is fixedly installed on the bracket 9, and the output end of the hydraulic motor is connected to the rotating shaft 8 to drive the rotating shaft 8 to drive the pendulum 4 to rotate on the bracket 9, so that the hammer head 42 rotates to a set height. The hydraulic motor can output a large torque to improve the hammering effect of the pendulum 4. In other embodiments, the driving main body can also be a conventional driving component such as an electric motor.

[0044] It should be noted that in order to realize the double-wave impact test function, the energy storage mechanism can increase the initial impact kinetic energy of the hammer head 42 of the pendulum 4. The energy storage mechanism is integrated in the driving main body, realizing the compact installation of the energy storage mechanism and the driving mechanism 5. When the driving main body is connected to the pendulum 4 through the clutch, the driving main body drives the rotating shaft 8 to rotate a set angle to drive the hammer head 42 of the pendulum 4 to rotate (in the opposite direction of the arrow shown in the figure) to a set height. When the hammer head 42 reaches the set height and is in the locked state, the energy storage mechanism starts to store energy in the reverse direction to increase the hammering kinetic energy of the pendulum 4. When the pendulum 4 is unlocked, it can accelerate to rotate (in the direction of the arrow shown in the figure) and hammer the positive wave generator installed at the hammering station.

[0045] Specifically, the energy storage mechanism adopts a hydraulic energy storage method, which can specifically be a hydraulic motor, to provide additional torque for the hammer head 42 during rotation, so that the pendulum 4 can obtain more kinetic energy on the basis of its own gravity, greatly increasing the impact speed when the pendulum 4 contacts the hammering station of the workbench 3 (or the positive wave generator installed at the hammering station).

[0046] Such as Figure 1 and Figure 2As shown, the double-wave impact testing machine further includes a braking mechanism 7 disposed on the base 1, and the braking mechanism 7 can lock or release the pendulum 4. Specifically, the braking mechanism 7 can lock or release the rotating shaft 8 to achieve the locking or releasing of the pendulum 4. The braking mechanism 7 includes a clamping driving member 71, a brake disc 72, and brake pads 73. The clamping driving member 71 is disposed on the base 1. The brake disc 72 is fixedly sleeved on the rotating shaft 8. The clamping driving member 71 is in transmission connection with the two brake pads 73 to make the two brake pads 73 approach each other to clamp the brake disc 72; or to make the two brake pads 73 move away from each other to release the brake disc 72. In addition, after the pendulum 4 completes one hammer strike, the brake can lock the pendulum 4 again to prevent the pendulum 4 from undergoing a secondary impact, improving the safety of the test process.

[0047] When performing an impact test, the pendulum 4 rotates to a set height, and the clamping driving member 71 drives the two brake pads 73 to approach each other to clamp the brake disc 72, thereby locking the pendulum 4. Then the clamping driving member 71 drives the two brake pads 73 to move away from each other to release the brake disc 72, so that the hammer head 42 of the pendulum 4 rotates under its own gravity and strikes the hammering station at the bottom of the workbench 3. When performing a double-wave impact test, the pendulum 4 rotates to a set height, and the clamping driving member 71 drives the two brake pads 73 to approach each other to clamp the brake disc 72, thereby locking the pendulum 4. The energy storage mechanism starts to store energy in the reverse direction. After the energy storage is completed, the clamping driving member 71 drives the two brake pads 73 to move away from each other to release the brake disc 72, so that the hammer head 42 of the pendulum 4 accelerates and rotates under its own gravity and the reverse torque applied by the energy storage mechanism and strikes the positive wave generator installed at the hammering station. The double-wave impact testing machine of this embodiment provides the kinetic energy of the pendulum 4 through the gravity of the hammer head 42 and the mechanical energy storage method, and has higher control accuracy and better impact repeatability compared with the method that only relies on the gravity of the pendulum 4 to provide the hammering load, which can reduce the time in the test debugging process, thereby improving the test efficiency.

[0048] As Figure 1 and Figure 2 shown, the double-wave impact testing machine further includes a guide shaft 10. A through hole is provided in the anvil 2 in the vertical direction. The top end of the guide shaft 10 is connected to the workbench 3, and the bottom end of the guide shaft 10 slides through the through hole. When the workbench 3 is struck by the pendulum 4, the workbench 3 can move upward in the vertical direction, and the guide shaft 10 can play a role in limiting and guiding the movement process of the workbench 3, improving the stability of the movement process of the workbench 3.

[0049] Furthermore, a limiting flange is provided at the bottom end of the guide shaft 10. The cross-sectional area of the limiting flange is larger than the opening area of the through hole, so as to prevent the lower end of the guide shaft 10 from extending into the through hole or passing through the through hole from bottom to top, thereby limiting the upward movement stroke of the workbench 3 and the guide shaft 10. In this embodiment, a plurality of guide shafts 10 are connected to the lower end of the workbench 3 to improve the support and limiting effects on the workbench 3 and ensure the stability of the workbench 3 during the upward movement process.

[0050] As Figure 1 and Figure 2 shown, the double-wave impact testing machine further includes a height adjustment mechanism 11. The height adjustment mechanism 11 is disposed on the anvil 2 and is supported and connected to the workbench 3 to adjust the initial height of the workbench 3, thereby adjusting the upward movement stroke of the workbench 3. In this embodiment, the height adjustment mechanism 11 is an adjustment oil cylinder. There are four adjustment oil cylinders. The piston rods of the four adjustment oil cylinders are respectively supported and connected to the four corner regions of the workbench 3. By changing the extension length of the piston rod, the initial height of the workbench 3 can be changed, thereby changing the upward movement stroke of the workbench 3 to meet the double-wave impact test standard. The adjustment oil cylinder can also play a buffering and supporting role when the workbench 3 falls, further improving the safety of the test. In other embodiments, the height adjustment mechanism can also be an electric push rod or an adjustment air cylinder, etc., which is not specifically limited herein.

[0051] Furthermore, the double-wave impact testing machine further includes a photoelectric sensor 12. The photoelectric sensor 12 is disposed on the base 1 and can measure the height of the workbench 3 after being adjusted by the height adjustment mechanism 11. When the adjustment oil cylinder adjusts the workbench 3 in place, the photoelectric sensor 12 can measure the height of the workbench 3. If the initial height requirement of the workbench 3 is met, the photoelectric sensor 12 sends a signal to the control unit, so that the control unit controls the piston rod of the adjustment oil cylinder to stop telescopic movement. Otherwise, the adjustment oil cylinder continues to adjust the initial height of the workbench 3 through the telescopic movement of the piston rod until the initial height requirement of the workbench 3 is met. The precise adjustment of the initial height of the workbench 3 is achieved through the photoelectric sensor 12.

[0052] The negative wave generator 6 of this embodiment is a pneumatic damping negative wave generator. The rigidity of the negative wave generator 6 is adjusted by adjusting the internal air pressure of the negative wave generator 6 and the diameter of the adjusting rod, so as to achieve the purpose of adjusting the waveform. The hooks 61 of the four negative wave generators 6 are connected to the work surface 3. When the work surface 3 is hammered and moves upward, the hooks 61 can be pulled to move synchronously to trigger the negative wave generator 6. During the entire hammering process, the negative wave generator 6 provides downward resistance, so that the speed of the work surface 3 is reduced to zero. The negative wave generator 6 can be supplied with gas by means of a high-pressure nitrogen bottle, an air compressor, etc., and the pressure inside the negative wave generator 6 is controlled by a solenoid valve. The solenoid valve is installed in the pipeline between the air source and the negative wave generator 6, and the inflating and deflation process of the negative wave generator 6 is controlled by the on-off of the solenoid valve. Since the positive wave generator and the negative wave generator 6 are both prior art, the structure and principle of the waveform generated by the positive wave generator and the negative wave generator 6 are not repeated.

[0053] For ease of understanding, a dual-wave impact test mode and an impact test mode of a dual-wave impact tester are specifically described.

[0054] When the dual-wave impact tester is in the dual-wave impact test mode, the test process is as follows:

[0055] 1) Start the driving mechanism 5, and the pendulum 4 rotates along the rotating shaft 8 in the opposite direction to the direction indicated by the arrow in the figure until the hammer head 42 of the pendulum 4 is lifted to the set height.

[0056] 2) The brake mechanism 7 clamps the brake pad 73 through the brake pad 73 to lock the pendulum 4 lifted to a set height.

[0057] 3) The driving body of the driving mechanism 5 is separated from the rotating shaft 8 through the clutch, and the energy storage mechanism stores energy in the reverse direction and is connected to the rotating shaft 8 through the clutch to increase the hammering kinetic energy of the pendulum 4.

[0058] 4) The brake mechanism 7 releases the pendulum 4, and the hammer head 42 of the pendulum 4 falls down at an accelerated speed.

[0059] 5) When the pendulum 4 hits the positive wave generator at the bottom of the work surface 3, the positive wave generator generates a positive pulse wave.

[0060] 6) After the collision, the work surface 3 moves upward and pulls the hook 61 of the negative wave generator 6 upward, so that the negative wave generator 6 is triggered and generates a negative pulse;

[0061] 7) When the impact ends, the pendulum 4 rebounds (rotates in the opposite direction of the arrow in the figure), and the brake mechanism 7 locks the pendulum 4 again to prevent the pendulum 4 from hitting the work surface 3 for the second time, and the test ends.

[0062] When the double-wave impact testing machine is in the impact test (medium-weight strong impact test in this embodiment) mode, the test process is as follows:

[0063] 1) Remove the positive wave generator and disengage the hook 61 of the workbench 3 from the negative wave generator 6.

[0064] 2) Start the driving mechanism 5, and the pendulum 4 rotates in the opposite direction of the arrow shown in the figure along the rotating shaft 8 until the hammer head 42 of the pendulum 4 is lifted to the set height.

[0065] 3) The hammer head 42 of the pendulum 4 freely falls by gravity and impacts the bottom of the workbench 3, and the test ends.

[0066] The above embodiments only illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, there are various changes and modifications to the present invention, and these changes and modifications all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. Double-wave impact testing machine, characterized in that, Comprising: An impact testing machine, including a base (1), an anvil (2), a workbench surface (3), a pendulum hammer (4) and a driving mechanism (5). The anvil (2) and the driving mechanism (5) are both fixedly arranged on the base (1). The workbench surface (3) is slidably arranged in the vertical direction on the upper surface of the anvil (2). One end of the pendulum hammer (4) is rotatably arranged on the base (1). The driving mechanism (5) is in transmission connection with the pendulum hammer (4) to drive the hammer head (42) of the pendulum hammer (4) to rotate to a set height. A positive wave generator, detachably arranged at the hammering station at the bottom of the workbench surface (3) and capable of being triggered after being hammered to generate a positive pulse wave. A negative wave generator (6), arranged on the anvil (2) and detachably and movably connected to the workbench surface (3). The negative wave generator (6) can be triggered after the workbench surface (3) is hammered and slides upward to generate a negative pulse wave. An energy storage mechanism. The hammer head (42) can freely fall at the set height and hammer the hammering station where the positive wave generator is not installed; or can hammer the positive wave generator installed at the hammering station under the drive of the energy storage mechanism. The double-wave impact testing machine further includes a braking mechanism (7) arranged on the base (1). The braking mechanism (7) can lock or release the pendulum hammer (4). The impact testing machine further includes a rotating shaft (8). The rotating shaft (8) is rotatably arranged on the base (1). One end of the hammer rod (41) of the pendulum hammer (4) is installed on the rotating shaft (8). The other end of the hammer rod (41) is connected to the hammer head (42). The output end of the driving mechanism (5) is connected to the rotating shaft (8). The braking mechanism (7) can lock or release the rotating shaft (8). The braking mechanism (7) includes: A clamping driving part (71), arranged on the base (1). A brake disc (72), fixedly sleeved on the rotating shaft (8). Brake pads (73). The clamping driving part (71) is in transmission connection with the two brake pads (73) to make the two brake pads (73) approach each other to clamp the brake disc (72); or to make the two brake pads (73) move away from each other to release the brake disc (72).

2. The double-wave impact testing machine according to claim 1, wherein, The impact testing machine further includes an angle detector. The angle detector is arranged on the rotating shaft (8) to detect the rotation angle of the rotating shaft (8).

3. The double-wave impact testing machine according to claim 1, wherein The driving mechanism (5) includes a driving main body and a clutch. The pendulum hammer (4) is selectively in transmission connection with the driving main body or the energy storage mechanism through the clutch.

4. The double-wave impact testing machine according to claim 1, characterized in that, The double-wave impact testing machine further includes a guiding shaft (10). A through hole is opened in the anvil (2) in the vertical direction. The top end of the guiding shaft (10) is connected to the workbench surface (3). The bottom end of the guiding shaft (10) slidably passes through the through hole.

5. The double-wave impact testing machine according to claim 4, characterized in that, A limiting flange is arranged at the bottom end of the guiding shaft (10). The cross-sectional area of the limiting flange is larger than the opening area of the through hole.

6. The double-wave impact testing machine according to claim 1, characterized in that, The double-wave impact testing machine further includes a height adjustment mechanism (11). The height adjustment mechanism (11) is disposed on the anvil (2) and is supported and connected to the workbench surface (3) to adjust the initial height of the workbench surface (3).

7. The double-wave impact testing machine according to claim 6, characterized in that, The double-wave impact testing machine further includes a photoelectric sensor (12). The photoelectric sensor (12) is disposed on the base (1) and can measure the height of the workbench surface (3) after being adjusted by the height adjustment mechanism (11).

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