Intelligent bolt durability test system

Abstract

The utility model provides a kind of intelligent bolt durability test system, it is related to measurement field, and it includes support component, drive component, clamping assembly and test installation component;Drive component, test installation component and clamping assembly are sequentially arranged on support component from left to right;Drive component includes DC motor and coupling, and the output of DC motor is connected with the first end of coupling;Test installation component includes guide rail, slider, probe mounting plate, bearing seat and lead screw, and guide rail is arranged parallel with lead screw up and down.The utility model realizes the stable reciprocating contact of probe by motor drive and lead screw slider mechanism, avoids the uneven pressing force and data discrete problem caused by artificial operation;Guide rail guide structure guarantees probe position, improves test stability;Triangular caliper firmly clamps intelligent bolt, prevents deviation in long time test.

Description

Technical Field

[0001] This utility model relates to the field of measurement, specifically to an intelligent bolt durability testing system. Background Technology

[0002] With the increasing demands for reliability and precise assembly in modern industrial equipment, bolts, as the most common connecting fasteners, directly affect the overall structural safety through the accuracy and stability of their preload. Traditional bolt preload detection typically relies on methods such as torque methods and tensile testing, but these methods require applying a loading device to the bolt, which is not only cumbersome but also unable to achieve real-time monitoring during operation. To address this issue, smart bolt technology has emerged. Smart bolts calculate the preload by forming a special coating on the bolt surface and measuring the change in acoustic time using ultrasonic pulse excitation. This technology enables non-contact, high-precision preload monitoring without damaging the connection structure.

[0003] However, smart bolts in actual engineering structures often require long-term and frequent measurement operations, such as periodic inspections, assembly debugging, and operation monitoring. During repeated measurements, the ultrasonic probe must repeatedly contact the surface of the bolt's coating layer, and even apply a certain amount of pressure to ensure signal coupling. With the increase in the number of measurements, the coating layer is prone to damage, peeling, or fatigue deterioration due to repeated contact and friction, leading to distortion or even complete loss of the acoustic signal, thus reducing the lifespan and measurement reliability of the smart bolt. If the durability of the coating layer under long-term use cannot be accurately assessed, it will directly affect the practical application and promotion of smart bolts.

[0004] Current research on the durability of smart bolt coatings mostly relies on manual pressing of the probe or simple linear mechanisms for repeated contact tests. These approaches have three main drawbacks: (1) poor repeatability between the probe and bolt positions, making it impossible to achieve a strictly consistent contact trajectory, thus affecting the comparability of experimental results; (2) rudimentary mechanisms, unable to achieve long-term, fixed-number, and fixed-frequency automated testing, making it difficult to simulate real engineering conditions. Therefore, it is necessary to design a smart bolt durability testing device with a stable structure, strong contact repeatability, and the ability to automatically perform a large number of cycles to obtain reliable coating durability evaluation data. Utility Model Content

[0005] To address the shortcomings of the existing technology, the present invention aims to provide an intelligent bolt durability testing system. Through motor drive, guide rail guidance, and triangular clamping, the system achieves stable and repeated contact between the probe and the bolt, resulting in high testing accuracy, good positional consistency, and long-term automatic cycling, thus ensuring reliable evaluation of coating durability.

[0006] Specifically, this utility model provides an intelligent bolt durability testing system, which includes a support component, a drive component, a clamping component, and a test installation component; The drive component, test installation component, and clamping component are sequentially mounted on the support component; The drive assembly includes a DC motor and a coupling, with the output end of the DC motor connected to the first end of the coupling; The test installation assembly includes a guide rail, a slider, a probe mounting plate, a bearing housing, and a lead screw. The guide rail and the lead screw are arranged parallel to each other vertically, and the first end of the lead screw is fixedly connected to the second end of the coupling. The second end of the lead screw is rotatably connected to the bearing housing through a bearing. The slider is set on the guide rail and the lead screw passes through the slider. The connection between the slider and the lead screw is provided with an internal thread structure that mates with the external thread of the lead screw. The probe mounting plate is set on the slider and has probe mounting holes. The fixed end of the clamping component is connected to the support component, and the clamping end of the clamping component is positioned opposite to the probe mounting hole of the probe mounting plate.

[0007] Preferably, it also includes a host computer, an intelligent bolt test probe, a microcontroller, a motor driver, and a DC power supply. The output terminal of the host computer is communicatively connected to the input terminal of the intelligent bolt test probe and the microcontroller, respectively. The output terminal of the microcontroller is communicatively connected to the input terminal of the motor driver, and the motor driver is electrically connected to the DC motor. The DC power supply provides power to the intelligent bolt test probe, the microcontroller, the motor driver, and the DC motor.

[0008] Preferably, the intelligent bolt test probe is mounted on the probe mounting hole of the probe mounting plate.

[0009] Preferably, the clamping component is a triangular caliper.

[0010] Preferably, the probe mounting plate has an L-shaped structure, with the bottom short side of the probe mounting plate connected to the top of the slider, and a probe mounting hole provided on the side long side of the probe mounting plate.

[0011] Preferably, the first end of the slider has a groove for sliding connection with the guide rail, and the second end of the slider has a rotating hole for the lead screw to pass through.

[0012] Preferably, the support device includes a base plate and a triangular plate, with the side of the triangular plate fixedly connected to the fixed end of the clamping assembly.

[0013] Preferably, the smart bolt is disposed at the clamping end of the clamping assembly.

[0014] Preferably, it also includes a guide rail pressure plate, the guide rail is connected to the support assembly through the guide rail pressure plate, and bolt holes are provided at both ends of the guide rail pressure plate and on the side wall of the support assembly, and the guide rail pressure plate is connected to the support assembly through bolts.

[0015] Prior to this, the probe mounting plate is also provided with a fixing hole, which is in communication with the probe mounting hole. The fixing hole is provided with an internal thread structure and a fixing bolt. The side wall of the fixing bolt is provided with an external thread structure that mates with the internal thread structure of the fixing hole.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention achieves automated reciprocating contact motion of the probe by setting up a drive mechanism consisting of a DC motor, coupling, and lead screw. Compared with the traditional manual pressing method, the motor drive can ensure a high degree of consistency in displacement and movement speed for each contact, making the frequency and number of probe contacts controllable. This effectively eliminates the signal dispersion problem caused by unstable pressing force in manual testing, and significantly improves the repeatability and accuracy of durability testing.

[0017] This invention utilizes a stable guiding structure comprised of a guide rail, a slider, and an L-shaped probe mounting plate to ensure that the probe's movement path remains strictly straight, avoiding poor contact caused by probe position offset and angle changes in traditional testing. The high rigidity of the guiding structure ensures that the probe maintains stable consistency even after thousands of contacts, fundamentally solving the defect in existing technologies where poor probe position repeatability affects data reliability. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the intelligent bolt durability testing system of this utility model; Figure 2 This is a front view of the overall structure of this utility model; Figure 3 This is a schematic diagram of the slider and slide rail combination of this utility model.

[0019] Key reference numerals: 7. DC motor; 8. Guide rail pressure plate; 9. Coupling; 10. Slider; 11. Probe mounting plate; 12. Probe; 13. Guide rail; 14. Fixing bolt; 15. Lead screw; 16. Triangular caliper; 17. Bearing; 18. Bearing housing; 19. Triangular plate; 20. Base plate. Detailed Implementation

[0020] The embodiments of this utility model will now be described with reference to the accompanying drawings.

[0021] The intelligent bolt durability testing system of this utility model mainly consists of a support assembly, a drive assembly, a tightening assembly, and a test installation assembly. Its structure is as follows: Figures 1 to 3 As shown, the drive assembly, test mounting assembly, and clamping assembly are sequentially mounted horizontally on the support assembly, forming a linear motion system for simulating repeated pressing of the probe onto the smart bolt.

[0022] The support assembly includes a base plate 20 and a triangular plate 19. The triangular plate 19 is vertically fixed to the base plate 20, serving as the main support surface for the entire device. A clamping assembly is fixed to the side of the triangular plate to ensure stability under load. The base plate is used to mount the motor, lead screw, guide rails, and all other mechanisms, providing a rigid foundation for the entire machine.

[0023] The drive assembly includes a DC motor 7 and a coupling 9. The output shaft of the DC motor 7 is securely connected to the first end of the coupling 9, and the second end of the coupling is connected to the first end of the lead screw 15. After being powered on, the DC motor can generate stable rotational motion. The coupling is used to compensate for any minor coaxiality errors that may exist between the motor shaft and the lead screw, making the rotation of the lead screw smoother and more stable.

[0024] The second end of the lead screw 15 is connected to the bearing housing 18 via the bearing 17. The bearing housing is fixed on the base plate 20, which can effectively prevent the lead screw from vibrating when rotating at high speed. The lead screw rotates under the drive of the motor, which in turn drives the slider 10, which meshes with its thread, to move linearly along the guide rail 13.

[0025] The test installation components mainly include guide rail 13, slider 10, probe mounting plate 11, lead screw 15, and guide rail pressure plate 8.

[0026] The guide rail 13 and the lead screw 15 are kept strictly parallel to ensure that the slider does not deviate when subjected to force. The guide rail pressure plate 8 is fixed to the base plate through bolt holes, pressing the guide rail to provide sufficient support rigidity.

[0027] The slider 10 has a threaded hole inside, which engages with the external thread of the lead screw 15. When the lead screw rotates, the slider moves in a precise linear motion along the guide rail. The front end of the slider has a groove for sliding connection with the guide rail, ensuring smooth and reliable sliding.

[0028] The probe mounting plate 11 is connected to the top of the slider and has an L-shaped structure. A probe mounting hole 12 is provided on the side for fixing the smart bolt test probe. The probe mounting plate also has fixing holes with internal threads, and fixing bolts 14 can be used to secure the probe in the mounting holes, thus ensuring that the probe does not loosen during high-frequency reciprocating motion.

[0029] The clamping assembly uses a triangular caliper 16, with its fixed end mounted on a triangular plate 19. It can be adjusted via a knob to accommodate smart bolts of different sizes. The smart bolt is installed at the clamping end of the triangular caliper. Due to the high clamping force and adjustable structure of the triangular caliper, the smart bolt remains accurately positioned and does not loosen during testing, thus avoiding errors.

[0030] The system includes host computer software, a microcontroller, a motor driver, and a smart bolt test probe. The host computer connects to the microcontroller via a serial port to send motor motion parameters, such as motion frequency, motion distance, and number of cycles.

[0031] After processing the instructions from the host computer, the microcontroller outputs pulse signals to the motor driver, causing the DC motor to run according to the set mode. The intelligent bolt test probe is fixed on the mounting plate and can collect real-time acoustic data caused by changes in the coating layer, and upload the data to the host computer for recording.

[0032] During operation, first install the smart bolt into the triangular caliper, ensuring the coated side faces the probe mounting hole. After installing the probe, the host computer sets the cycle count, for example, 30 times / minute, for a total of 1000 times, and then issues the execution command.

[0033] A DC motor drives a lead screw to rotate, which in turn pushes a slider back and forth, causing the probe to repeatedly contact the coating layer of the smart bolt at a set frequency. During each contact, the probe transmits an acoustic signal to the testing system, which processes it and sends it to the host computer for real-time data recording. Throughout the process, the contact position, pressure, and movement trajectory remain consistent, ensuring good comparability of the test data.

[0034] Once the set number of cycles is reached, the device will automatically stop. Users can then export the acoustic data to analyze whether the coating has degraded, been damaged, or experienced increased signal error.

[0035] This invention achieves automated reciprocating contact motion of the probe by setting up a drive mechanism consisting of a DC motor, coupling, and lead screw. Compared with the traditional manual pressing method, the motor drive can ensure a high degree of consistency in displacement and movement speed for each contact, making the frequency and number of probe contacts controllable. This effectively eliminates the signal dispersion problem caused by unstable pressing force in manual testing, and significantly improves the repeatability and accuracy of durability testing.

[0036] This invention utilizes a stable guiding structure comprised of a guide rail, a slider, and an L-shaped probe mounting plate to ensure that the probe's movement path remains strictly straight, avoiding poor contact caused by probe position offset and angle changes in traditional testing. The high rigidity of the guiding structure ensures that the probe maintains stable consistency even after thousands of contacts, fundamentally solving the defect in existing technologies where poor probe position repeatability affects data reliability.

[0037] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. An intelligent bolt durability testing system, characterized in that: It includes support components, drive components, clamping components, and test and installation components; The drive component, test installation component, and clamping component are sequentially mounted on the support component; The drive assembly includes a DC motor and a coupling, with the output end of the DC motor connected to the first end of the coupling; The test installation assembly includes a guide rail, a slider, a probe mounting plate, a bearing housing, and a lead screw. The guide rail and the lead screw are arranged parallel to each other vertically, and the first end of the lead screw is fixedly connected to the second end of the coupling. The second end of the lead screw is rotatably connected to the bearing housing through a bearing. The slider is set on the guide rail and the lead screw passes through the slider. The connection between the slider and the lead screw is provided with an internal thread structure that mates with the external thread of the lead screw. The probe mounting plate is set on the slider and has probe mounting holes. The fixed end of the clamping component is connected to the support component, and the clamping end of the clamping component is positioned opposite to the probe mounting hole of the probe mounting plate.

2. The intelligent bolt durability testing system according to claim 1, characterized in that: It also includes a host computer, an intelligent bolt test probe, a microcontroller, a motor driver, and a DC power supply. The output of the host computer is connected to the input of the intelligent bolt test probe and the microcontroller, respectively. The output of the microcontroller is connected to the input of the motor driver, and the motor driver is electrically connected to the DC motor. The DC power supply provides power to the intelligent bolt test probe, the microcontroller, the motor driver, and the DC motor.

3. The intelligent bolt durability testing system according to claim 1, characterized in that: The intelligent bolt test probe is mounted on the probe mounting hole of the probe mounting plate.

4. The intelligent bolt durability testing system according to claim 1, characterized in that: The clamping component is a triangular caliper.

5. The intelligent bolt durability testing system according to claim 1, characterized in that: The probe mounting plate has an L-shaped structure. The bottom short side of the probe mounting plate is connected to the top of the slider, and the long side of the probe mounting plate has a probe mounting hole.

6. The intelligent bolt durability testing system according to claim 1, characterized in that: The first end of the slider has a groove for sliding connection with the guide rail, and the second end of the slider has a rotating hole for the lead screw to pass through.

7. The intelligent bolt durability testing system according to claim 1, characterized in that: The support device includes a base plate and a triangular plate, with the side of the triangular plate fixedly connected to the fixed end of the clamping assembly.

8. The intelligent bolt durability testing system according to claim 1, characterized in that: The smart bolt is installed at the clamping end of the clamping assembly.

9. The intelligent bolt durability testing system according to claim 1, characterized in that: It also includes a guide rail pressure plate, through which the guide rail is connected to the support assembly. Bolt holes are provided at both ends of the guide rail pressure plate and on the side wall of the support assembly, and the guide rail pressure plate is connected to the support assembly by bolts.

10. The intelligent bolt durability testing system according to claim 1, characterized in that: The probe mounting plate is also provided with a fixing hole, which is connected to the probe mounting hole. The fixing hole is provided with an internal thread structure and a fixing bolt. The side wall of the fixing bolt is provided with an external thread structure that mates with the internal thread structure of the fixing hole.

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