Reliability accelerated degradation test device and method for transmission system of three-coordinate measuring machine

Abstract

The invention relates to a reliability accelerated degradation test device and method for a three-coordinate measuring machine transmission system, and aims to solve the problems that in the current precision measurement field, a traditional three-coordinate measuring instrument is single in function, and it is difficult to synchronously obtain multi-dimensional mechanical response of a measured object in the spatial position change process. The device is composed of a measuring system, a processing system, a transmission system and a frame system. The servo motor drives a tested object to move or load, and the magnetic powder brake applies a controllable resistance load; in the moving and loading process, a dynamic torque sensor measures torque borne or transmitted by a driven belt wheel shaft in real time, a pressure sensor measures tensile force borne or transmitted by a belt in real time, a strain gauge measures strain of key parts of the belt in real time, and a servo motor driver monitors load current of a driving motor in real time. And all sensor signals are synchronously acquired, processed, displayed and recorded through the integrated data acquisition system.

Description

Technical Field

[0001] This invention relates to a reliability accelerated degradation test device and method for a coordinate measuring machine transmission system, specifically to the field of precision transmission and reliability monitoring. Background Technology

[0002] With the development of mechatronics technology and high-precision sensing technology, the demand for comprehensive performance testing of complex moving mechanisms and components under multi-dimensional mechanical states is increasing. Coordinate measuring machines (CMMs), as commonly used devices for spatial position and physical quantity detection, have broad application prospects in precision equipment R&D and online quality monitoring. Due to their ability to simultaneously acquire the inherent correlation between spatial position and multiple mechanical / electrical parameters, multi-parameter fusion CMM technology has become one of the research hotspots in the field of precision testing and fault diagnosis in recent years. However, traditional CMMs or single-function testing equipment still have some problems in practical applications, such as limited measurement parameters, difficulty in simulating real load conditions, and inability to synchronously correlate dynamic position and multi-dimensional mechanical response. These limitations restrict their performance in the fields of comprehensive performance evaluation of complex moving mechanisms, dynamic material property analysis, and online automated precision testing.

[0003] Traditional coordinate measuring machines (CMMs) or single-function testing equipment face difficulties in simultaneously acquiring spatial position and multi-dimensional mechanical / electrical parameter correlation data under realistic simulated load conditions. Due to the fragmented functional modules and singular measurement dimensions in traditional designs, they cannot meet the high-fidelity comprehensive performance evaluation requirements of complex motion mechanisms under dynamic loads in practical applications. Traditional solutions also suffer from issues with high-precision synchronization and the completeness of load simulation. The lack of integrated load simulation units, multi-sensor synchronous acquisition architectures, and data fusion and analysis mechanisms, coupled with fragmented measurement dimensions, significantly limits the application scope of such equipment in online testing of precision transmission systems, research on the dynamic mechanical behavior of materials, and predictive maintenance of high-end equipment. Therefore, designing an intelligent multi-parameter coordinate measuring system based on multi-sensor synchronous fusion technology and integrated load simulation technology is of great significance and has promising application prospects in fields such as precision component testing and accelerated degradation testing of large components. Summary of the Invention

[0004] To address the limitations of traditional coordinate measuring machines (CMMs) in the simultaneous acquisition of multidimensional mechanical parameters and simulation of real-world load conditions, this invention discloses an accelerated degradation test device for the reliability of a CMM transmission system. This platform employs a modular integrated design, enabling high-precision, highly synchronous real-time measurement and dynamic correlation analysis of multidimensional parameters such as spatial position, dynamic torque, axial tension, local strain, and drive current. It also exhibits high measurement reliability and adaptability to various operating conditions. Furthermore, it improves the system's long-term stability in complex industrial environments and enhances the overall accuracy and consistency of multi-physical quantity measurements.

[0005] The technical solution of this invention is:

[0006] An accelerated degradation reliability test device for a coordinate measuring machine transmission system comprises a processing system, a frame system, a measurement system, and a transmission system.

[0007] The measurement system includes a driven wheel fixing plate 6, a pressure sensor 7, a full-bridge strain gauge 8-1 (No. 1), a full-bridge strain gauge 8-2 (No. 2), a full-bridge strain gauge 8-3 (No. 3), a full-bridge strain gauge 8-4 (No. 4), a dynamic torque sensor 9-1, a dynamic torque sensor fixing plate 9-2, a magnetic powder brake 10-1, and a magnetic powder brake fixing plate 10-2.

[0008] The driven wheel fixing plate 6 is fixed to the aluminum frame 5-2 in the frame system. The pressure sensor 7 is fixed to the driven wheel fixing plate 6. The No. 1 full-bridge strain gauge 8-1, No. 2 full-bridge strain gauge 8-2, No. 3 full-bridge strain gauge 8-3, and No. 4 full-bridge strain gauge 8-4 are respectively fixed to the upper surface of the synchronous belt 12 in the transmission system. The dynamic torque sensor fixing plate 9-2 is fixed to the aluminum frame 5-2. The dynamic torque sensor 9-1 is fixed to the dynamic torque sensor fixing plate 9-2. The magnetic powder brake fixing plate 10-2 is fixed. On the aluminum frame 5-2, the magnetic powder brake 10-1 is fixed on the magnetic powder brake fixing plate 10-2. The No. 1 full-bridge strain gauge 8-1, the No. 2 full-bridge strain gauge 8-2, the No. 3 full-bridge strain gauge 8-3, and the No. 4 full-bridge strain gauge 8-4 are connected to the data acquisition card 4 in the processing system via data cables. The pressure sensor 7 is connected to the data acquisition card 4 via a data cable. The dynamic torque sensor 9-1 is connected to the data acquisition card 4 via a data cable. The magnetic powder brake 10-1 is connected to the data acquisition card 4 via a data cable.

[0009] An accelerated degradation reliability test device for a coordinate measuring machine (CMM) transmission system comprises a computer display screen, computer host, computer desk, keyboard, data acquisition card, machine cover, aluminum frame, driven wheel fixing plate, pressure sensor, No. 1 full-bridge strain gauge, No. 2 full-bridge strain gauge, No. 3 full-bridge strain gauge, No. 4 full-bridge strain gauge, dynamic torque sensor, dynamic torque sensor fixing plate, magnetic powder brake, magnetic powder brake fixing plate, guide rail, synchronous belt, X-direction drive pulley shaft, keyless bushing, X-direction wedge belt large pulley, and X-direction wedge belt. Composed of: bearing cover of reducer No. 1, X-direction drive pulley seat, X-direction drive pulley fixing plate, DC servo motor No. 1, aviation plug bracket, X-direction small pulley bracket, DC servo motor seat, X-direction small pulley seat, X-direction small pulley tensioning block, X-direction wedge belt small pulley shaft, X-direction small pulley bearing cover, driven pulley base, driven pulley seat, bearing cover of reducer No. 2, X-direction driven pulley shaft, mounting base No. 1, mounting base No. 2, synchronous belt pressure plate, synchronous belt mounting plate No. 1, synchronous belt mounting plate No. 2, and trolley mounting plate.

[0010] The processing system includes a computer monitor, a computer host, a computer desk, a keyboard, and a data acquisition card. The computer desk is installed on the ground to the left of the aluminum frame, and the computer monitor, computer host, keyboard, and data acquisition card are placed on the surface of the computer desk to isolate the processing system from the motor and avoid vibration and electromagnetic interference.

[0011] The frame system includes a cover and an aluminum frame; the aluminum frame is installed on the ground, and the cover and the aluminum frame are connected by bolts, spring washers and nuts to ensure the overall stability of the machine body.

[0012] The measurement system includes a driven wheel fixing plate, a pressure sensor, four full-bridge strain gauges (No. 1, No. 2, No. 3, and No. 4), a dynamic torque sensor, a dynamic torque sensor fixing plate, a magnetic powder brake, and a magnetic powder brake fixing plate. The driven wheel fixing plate is fixed to the aluminum frame with screws. The pressure sensor is also fixed to the driven wheel fixing plate with screws. The four full-bridge strain gauges (No. 1, No. 2, No. 3, and No. 4) are respectively attached to the upper surface of the synchronous belt. The dynamic torque sensor fixing plate is fixed to the aluminum frame with screws. The sensor is fixed to the dynamic torque sensor mounting plate with screws, the magnetic powder brake mounting plate is fixed to the aluminum frame with screws, and the magnetic powder brake is fixed to the magnetic powder brake mounting plate with screws. Full-bridge strain gauges No. 1, No. 2, No. 3, and No. 4 are connected to the data acquisition card via data cables. The pressure sensor, the dynamic torque sensor, and the magnetic powder brake are all connected to the data acquisition card via data cables, in order to achieve the purpose of multi-parameter monitoring and closed-loop control of the transmission system.

[0013] The transmission system includes a guide rail, a synchronous belt, an X-axis drive pulley shaft, a keyless bushing, an X-axis wedge belt large pulley, an X-axis wedge belt, a bearing cover for reducer #1, an X-axis drive pulley seat, an X-axis drive pulley fixing plate, a DC servo motor #1, an aviation plug bracket, an X-axis small pulley bracket, a DC servo motor seat for #1, an X-axis small pulley seat, an X-axis small pulley tensioning block, an X-axis wedge belt small pulley shaft, an X-axis small pulley bearing cover, a driven pulley base, a driven pulley seat, a reducer #2 bearing cover, an X-axis driven pulley shaft, a mounting base #1, a mounting base #2, and a synchronous belt pressure plate. The system includes a No. 1 synchronous belt mounting plate, a No. 2 synchronous belt mounting plate, and a trolley mounting plate. The guide rail is fixed to the aluminum frame with screws. The synchronous belt is pre-tensioned and installed between the X-direction driving pulley shaft and the X-direction driven pulley shaft. The X-direction driving pulley fixing plate is fixed to the aluminum frame with screws. The X-direction driving pulley seat is fixed to the aluminum frame with screws. The No. 1 reducer bearing cover is fixed to the X-direction driving pulley seat with screws. The X-direction driving pulley shaft is connected to the X-direction wedge belt large pulley via a keyless bushing. The X-direction wedge belt is pre-tensioned and installed between the X-direction wedge belt large pulley and the X-direction wedge belt small pulley shaft. The X-axis small pulley bracket is fixed to the aluminum frame with screws. The X-axis small pulley seat and the No. 1 DC servo motor seat are fixed to the X-axis small pulley bracket with the same screw. The No. 1 DC servo motor is fixed to the No. 1 DC servo motor seat with screws. The aviation plug bracket is fixed to the No. 1 DC servo motor by welding. The X-axis small pulley tensioning block is fixed to the X-axis small pulley bracket with screws. The X-axis wedge belt small pulley shaft is connected to the No. 1 DC servo motor through a coupling. The X-axis small pulley bearing cover is fixed to the X-axis small pulley seat with screws. The driven pulley base is fixed to the X-axis small pulley seat with screws. The drive pulley seat is fixed to the aluminum frame with screws, and the No. 2 reducer bearing cover is fixed to the drive pulley seat with screws. The X-axis drive pulley shaft is fixed to the drive pulley seat with rolling bearings. Mounting base No. 1 and mounting base No. 2 are fixedly connected with screws. Mounting base No. 2 is fixed to the trolley mounting plate with screws. The No. 2 synchronous belt mounting plate and the trolley mounting plate are fixed with screws. The synchronous belt pressure plate and the No. 1 synchronous belt mounting plate are fixed to the No. 2 synchronous belt mounting plate with screws, so as to improve the dynamic accuracy of the transmission system.

[0014] The dynamic torque sensor is model DYN-200-D18, with a measurement range of 0-50 N*m. The magnetic powder brake is model PB-5, with a measurement range of 0-50 N*m. The dynamic torque sensor and the magnetic powder brake are connected by a standard coupling. Full-bridge strain gauges No. 1, No. 2, No. 3, and No. 4 are all of the same model and specifications, and are evenly pasted on the surface of the synchronous belt, ensuring flatness and no scratches. The pressure sensor is model FL34H, with a measurement range of 0-30000 N, to achieve the purpose of collaborative measurement under extreme load conditions and quantitative verification of failure warning threshold.

[0015] The aluminum frame is made of 83 hollow grooved rods. Among them, there are 8 rods with a length of 3800mm, 31 rods with a length of 840mm, 8 rods with a length of 700mm, 20 rods with a length of 300mm, 8 rods with a length of 245mm, and 8 rods with a length of 150mm. There are grooves of the same size on all four sides perpendicular to the cross-section of the rods. The purpose is to connect and fix them to other workpieces with bolts, washers, and nuts, so as to improve the rigidity and stability of the machine body.

[0016] The trolley mounting plate is provided with a U-shaped hole, which is connected to the No. 2 synchronous belt mounting plate by bolts, washers and nuts. The synchronous belt pressure plate and the No. 1 synchronous belt mounting plate are respectively fixed to the No. 2 synchronous belt mounting plate by screws. The upper and lower surfaces of the synchronous belt are in close contact with the No. 2 synchronous belt mounting plate and the synchronous belt pressure plate, respectively. The U-shaped hole of the trolley mounting plate (37) enables the entire device to move in the vertical direction, thereby reducing the droop of the synchronous belt (12) in the vertical direction, so as to achieve the purpose of improving the rigidity of the transmission system.

[0017] The X-axis small pulley tensioning block can achieve unidirectional feed movement through the preload screw. The preload screw is in direct contact with the X-axis wedge belt. By changing the preload of the preload screw, the preload of the X-axis wedge belt can be changed, thereby changing the preload force of the transmission system to simulate different actual working conditions.

[0018] The vertical distance between the dynamic torque sensor mounting plate and the magnetic powder brake mounting plate is 95mm, thus ensuring that their coaxiality error is less than Φ2mm; the No.1, No.2, No.3, and No.4 full-bridge strain gauges are assembled in parallel with a parallelism error of less than or equal to 0.01mm, so as to achieve the purpose of accurate and efficient transmission of torque and shear force.

[0019] A test method for an accelerated degradation reliability test device for a coordinate measuring machine transmission system includes:

[0020] The No. 1 DC servo motor 20 drives the small pulley shaft 26 of the X-direction wedge belt, which drives the large pulley 15 of the X-direction wedge belt through the X-direction wedge belt 16 and the keyless bushing 14, and finally transmits the power to the synchronous belt 12.

[0021] The magnetic powder brake 10-1 applies a controllable resistance torque to the driven pulley shaft 31 in the X direction through the dynamic torque sensor 9-1, which accurately simulates the load in the actual operation of the coordinate measuring machine.

[0022] Dynamic torque sensor 9-1 captures the torque fluctuation of the drive shaft in real time, pressure sensor 7 monitors the overall tension of the synchronous belt, and full-bridge strain gauges 1-8-1, 2-8-2, 3-8-3, and 4-8-4 are attached to the surface of the synchronous belt in a circumferentially equidistant manner to construct a distributed shear force monitoring system.

[0023] All sensor signals are synchronously acquired through data acquisition card 4;

[0024] The feed rate is increased by the preload screw of the X-axis small pulley tensioning block 25, causing a step decrease in the preload of the X-axis wedge belt 16, simulating the actual working conditions of the transmission system during long-term operation.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0026] 1. Integrated Multi-Parameter Synchronous Measurement Capability: The intelligent multi-parameter coordinate measuring platform disclosed in this invention adopts a modular integrated architecture, enabling simultaneous acquisition and dynamic correlation analysis of multiple parameters on a single platform. Traditional comprehensive performance testing solutions typically require the combination of multiple independent devices and synchronization via complex external clocks, resulting in complex structures and controls. In contrast, the platform disclosed in this invention is more compact, easier to deploy, and can meet the efficient integrated testing needs of complex mechanisms under real-world load conditions.

[0027] 2. Modular Rapid Maintenance Structure: The platform disclosed in this invention incorporates a quick-release sensor interface and a slide-rail replacement module in its structural design. Most traditional measuring equipment requires additional specialized tools and calibration fixtures for on-site maintenance, resulting in complex disassembly and assembly, and long downtime. The platform disclosed in this invention allows for manual replacement of torque / pressure sensor modules and enables rapid, calibration-free replacement of the load unit (magnetic powder brake), improving the maintainability and continuous operation capability of production line testing equipment.

[0028] 3. Precise Adjustment Structure Without Disassembly: The transmission system pretensioning device disclosed in this invention incorporates a direct-contact mechanism between the pretensioning screw and the wedge belt during its design and manufacturing. Most traditional belt drive tensioning systems require additional disassembly tools and tension testing instruments to meet the needs of accelerated degradation testing, resulting in complex operation and high costs. The device disclosed in this invention allows for stepless adjustment of the pretensioning force by a single person using a standard hex wrench, improving the efficiency of simulating accelerated degradation test conditions.

[0029] 4. Wide Applicability: The multi-dimensional synchronous measurement capabilities and strong adaptability of the platform disclosed in this invention make it widely applicable in fields such as quality inspection of transmission components in new energy vehicles, R&D of precision motion mechanisms in medical devices, and optimization of dynamic characteristics of semiconductor robotic arms. It can improve the accuracy of comprehensive performance evaluation and the level of automated testing for complex electromechanical systems, meeting the high reliability verification requirements of intelligent manufacturing for high-end equipment. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of the reliability accelerated degradation test device for the transmission system of a coordinate measuring machine according to the present invention;

[0031] Figure 2 This is a schematic diagram of the processing system structure of the present invention;

[0032] Figure 3 This is a schematic diagram of the measurement system structure of the present invention;

[0033] Figure 4 This is a schematic diagram of the transmission system structure of the present invention;

[0034] Figure 5 This is a schematic diagram of the X-direction drive wheel structure in the transmission system of the present invention;

[0035] Figure 6 This is a schematic diagram of the X-direction driven wheel structure in the transmission system of the present invention;

[0036] Figure 7 This is a schematic diagram of the clamping device structure in the transmission system of the present invention;

[0037] The meanings of the labels in the diagram are as follows:

[0038] 1-1. Computer monitor; 1-2. Computer host; 2. Computer desk; 3. Keyboard; 4. Data acquisition card; 5-1. Cover; 5-2. Aluminum frame; 6. Driven wheel fixing plate; 7. Pressure sensor; 8-1. No. 1 full-bridge strain gauge; 8-2. No. 2 full-bridge strain gauge; 8-3. No. 3 full-bridge strain gauge; 8-4. No. 4 full-bridge strain gauge; 9-1. Dynamic torque sensor; 9-2. Dynamic torque sensor fixing plate; 10-1. Magnetic powder brake; 10-2. Magnetic powder brake fixing plate; 11. Guide rail; 12. Synchronous belt; 13. X-direction drive pulley shaft; 14. Keyless bushing; 15. X-direction wedge belt large pulley; 16. X-direction wedge belt; 17. 18. Reducer bearing cover; 19. X-axis drive pulley seat; 20. X-axis drive pulley fixing plate; 21. DC servo motor No. 1; 22. Aviation plug bracket; 23. X-axis small pulley bracket; 24. DC servo motor No. 1 seat; 25. X-axis small pulley tensioning block; 26. X-axis wedge belt small pulley shaft; 27. X-axis small pulley bearing cover; 28. Driven pulley base; 29. ​​Driven pulley seat; 30. Reducer bearing cover No. 2; 31. X-axis driven pulley shaft; 32. Mounting base No. 1; 33. Mounting base No. 2; 34. Synchronous belt pressure plate; 35. Synchronous belt mounting plate No. 1; 36. Synchronous belt mounting plate No. 2; 37. Trolley mounting plate. Specific Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] This invention discloses a reliability accelerated degradation test device for a coordinate measuring machine transmission system, such as... Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7As shown, the system consists of: computer display screen 1-1, computer host 1-2, computer desk 2, keyboard 3, data acquisition card 4, cover 5-1, aluminum frame 5-2, driven wheel fixing plate 6, pressure sensor 7, No. 1 full-bridge strain gauge 8-1, No. 2 full-bridge strain gauge 8-2, No. 3 full-bridge strain gauge 8-3, No. 4 full-bridge strain gauge 8-4, dynamic torque sensor 9-1, dynamic torque sensor fixing plate 9-2, magnetic powder brake 10-1, magnetic powder brake fixing plate 10-2, guide rail 11, synchronous belt 12, X-direction drive pulley shaft 13, keyless bushing 14, X-direction wedge belt large pulley 15, X-direction wedge belt 16, and No. 1 reduction gear. The system consists of: bearing cover 17, X-axis drive pulley seat 18, X-axis drive pulley fixing plate 19, DC servo motor No. 1 20, aviation plug bracket 21, X-axis small pulley bracket 22, DC servo motor No. 1 seat 23, X-axis small pulley seat 24, X-axis small pulley tensioning block 25, X-axis wedge belt small pulley shaft 26, X-axis small pulley bearing cover 27, driven pulley base 28, driven pulley seat 29, reducer bearing cover 30, X-axis driven pulley shaft 31, mounting base No. 1 32, mounting base No. 2 33, synchronous belt pressure plate 34, synchronous belt No. 1 mounting plate 35, synchronous belt No. 2 mounting plate 36, and pulley mounting plate 37.

[0041] The processing system includes a computer display screen 1-1, a computer host 1-2, a computer desk 2, a keyboard 3, and a data acquisition card 4;

[0042] The computer desk 2 is installed on the ground to the left of the aluminum frame 5-2, and the computer display screen 1-1, computer host 1-2, keyboard 3, and data acquisition card 4 are placed on the surface of the computer desk 2.

[0043] The frame system includes a hood 5-1 and an aluminum frame 5-2;

[0044] The aluminum frame 5-2 is installed on the ground, and the cover 5-1 and the aluminum frame 5-2 are connected by bolts, spring washers and nuts;

[0045] The measurement system includes a driven wheel fixing plate 6, a pressure sensor 7, a full-bridge strain gauge 8-1 (No. 1), a full-bridge strain gauge 8-2 (No. 2), a full-bridge strain gauge 8-3 (No. 3), a full-bridge strain gauge 8-4 (No. 4), a dynamic torque sensor 9-1, a dynamic torque sensor fixing plate 9-2, a magnetic powder brake 10-1, and a magnetic powder brake fixing plate 10-2.

[0046] The driven wheel fixing plate 6 is fixed to the aluminum frame 5-2 with screws. The pressure sensor 7 is fixed to the driven wheel fixing plate 6 with screws. Full-bridge strain gauges 8-1 (No. 1), 8-2 (No. 2), 8-3 (No. 3), and 8-4 (No. 4) are respectively attached to the upper surface of the synchronous belt 12. The dynamic torque sensor fixing plate 9-2 is fixed to the aluminum frame 5-2 with screws. The dynamic torque sensor 9-1 is fixed to the dynamic torque sensor fixing plate 9-2 with screws. The magnetic powder brake fixing plate 10-2... The magnetic powder brake 10-1 is fixed to the aluminum frame 5-2 with screws. The magnetic powder brake 10-1 is fixed to the magnetic powder brake mounting plate 10-2 with screws. The full-bridge strain gauges 8-1, 8-2, 8-3, and 8-4 are connected to the data acquisition card 4 via data cables. The pressure sensor 7 is connected to the data acquisition card 4 via a data cable. The dynamic torque sensor 9-1 is connected to the data acquisition card 4 via a data cable. The magnetic powder brake 10-1 is connected to the data acquisition card 4 via a data cable.

[0047] The transmission system includes a guide rail 11, a synchronous belt 12, an X-direction drive pulley shaft 13, a keyless bushing 14, an X-direction wedge belt large pulley 15, an X-direction wedge belt 16, a No. 1 reducer bearing cover 17, an X-direction drive pulley seat 18, an X-direction drive pulley fixing plate 19, a No. 1 DC servo motor 20, an aviation plug bracket 21, an X-direction small pulley bracket 22, a No. 1 DC servo motor seat 23, an X-direction small pulley seat 24, an X-direction small pulley tensioning block 25, an X-direction wedge belt small pulley shaft 26, an X-direction small pulley bearing cover 27, a driven pulley base 28, a driven pulley seat 29, a No. 2 reducer bearing cover 30, an X-direction driven pulley shaft 31, a No. 1 mounting base 32, a No. 2 mounting base 33, a synchronous belt pressure plate 34, a No. 1 synchronous belt mounting plate 35, a No. 2 synchronous belt mounting plate 36, and a trolley mounting plate 37.

[0048] The guide rail 11 is fixed to the aluminum frame 5-2 with screws. The synchronous belt 12 is pre-tensioned and installed between the X-direction driving pulley shaft 13 and the X-direction driven pulley shaft 31. The X-direction driving pulley fixing plate 19 is fixed to the aluminum frame 5-2 with screws. The X-direction driving pulley seat 18 is fixed to the aluminum frame 5-2 with screws. The bearing cover 17 of the No. 1 reducer is fixed to the X-direction driving pulley seat 18 with screws. The X-direction driving pulley shaft 13 is connected to the X-direction wedge belt via a keyless bushing 14. The pulleys 15 are connected, and the X-direction wedge belt 16 is pre-tensioned and installed between the large X-direction wedge belt pulley 15 and the small X-direction wedge belt pulley shaft 26. The small X-direction pulley bracket 22 is fixed to the aluminum frame 5-2 with screws. The small X-direction pulley seat 24 and the No. 1 DC servo motor seat 23 are fixed to the small X-direction pulley bracket 22 with the same screw. The No. 1 DC servo motor 20 is fixed to the No. 1 DC servo motor seat 23 with screws. The aviation plug bracket 21 is fixed to the frame 5-2 by welding. On DC servo motor 20, the X-axis small pulley tensioning block 25 is fixed to the X-axis small pulley bracket 22 with screws. The X-axis wedge belt small pulley shaft 26 is connected to DC servo motor 20 via a coupling. The X-axis small pulley bearing cover 27 is fixed to the X-axis small pulley seat 24 with screws. The driven pulley base 28 is fixed to the aluminum frame 5-2 with screws. The driven pulley seat 29 is fixed to the driven pulley base 28 with screws. The bearing cover 30 of reducer 2 is... The driven pulley seat 29 is fixed with screws, and the driven pulley shaft 31 in the X direction is fixed to the driven pulley seat 29 through rolling bearings; the No. 1 mounting base 32 and the No. 2 mounting base 33 are fixedly connected by screws, the No. 2 mounting base 33 is fixed to the trolley mounting plate 37 by screws, the No. 2 synchronous belt mounting plate 36 and the trolley mounting plate 37 are fixed by screws, and the synchronous belt pressure plate 34 and the No. 1 synchronous belt mounting plate 35 are respectively fixed to the No. 2 synchronous belt mounting plate 36 by screws;

[0049] The dynamic torque sensor 9-1 is model DYN-200-D18, with a measurement range of 0-50 N*m. The magnetic powder brake 10-1 is model PB-5, with a measurement range of 0-50 N*m. The dynamic torque sensor 9-1 and the magnetic powder brake 10-1 are connected by a standard coupling. The full-bridge strain gauges 8-1 (model 1), 8-2 (model 2), 8-3 (model 3), and 8-4 (model 4) are all of the same model and specifications and are evenly pasted on the upper surface of the synchronous belt 12, ensuring that they are flat and free of scratches. The pressure sensor is model FL34H, with a measurement range of 0-30000 N.

[0050] The aluminum frame 5-2 is made of 83 hollow grooved rods connected together. Among them, there are 8 rods with a length of 3800mm, 31 rods with a length of 840mm, 8 rods with a length of 700mm, 20 rods with a length of 300mm, 8 rods with a length of 245mm, and 8 rods with a length of 150mm. There are grooves of the same size on all four sides perpendicular to the cross-section of the rods. The purpose is to connect and fix them to other workpieces by bolts, washers, and nuts.

[0051] The trolley mounting plate 37 is provided with a U-shaped hole and is connected to the No. 2 synchronous belt mounting plate 36 by bolts, washers and nuts. The synchronous belt pressure plate 34 and the No. 1 synchronous belt mounting plate 35 are respectively fixed to the No. 2 synchronous belt mounting plate 36 by screws. The upper and lower surfaces of the synchronous belt 12 are in close contact with the No. 2 synchronous belt mounting plate 36 and the synchronous belt pressure plate 34 respectively. The U-shaped hole of the trolley mounting plate 37 enables the entire device to move in the vertical direction, thereby reducing the sagging of the synchronous belt 12 in the vertical direction.

[0052] The X-axis small pulley tensioning block 25 can achieve unidirectional feed movement through the pre-tightening screw. The pre-tightening screw is in direct contact with the X-axis wedge belt 16. By changing the pre-tightening degree of the pre-tightening screw, the pre-tightening degree of the X-axis wedge belt 16 can be changed, thereby changing the pre-tightening force of the transmission system.

[0053] The vertical distance between the dynamic torque sensor fixing plate 9-2 and the magnetic powder brake fixing plate 10-2 is 95mm, thereby ensuring that their coaxiality error is less than Φ2mm; the No.1 full-bridge strain gauge 8-1, the No.2 full-bridge strain gauge 8-2, the No.3 full-bridge strain gauge 8-3, and the No.4 full-bridge strain gauge 8-4 are assembled in parallel, and the parallelism error is less than or equal to 0.01mm.

[0054] Working principle

[0055] The reliability accelerated degradation test device for the transmission system of a coordinate measuring machine (CMM) begins by driving the small X-axis wedge belt pulley shaft 26 via the DC servo motor 20, which then drives the large X-axis wedge belt pulley 15 via the X-axis wedge belt 16 and keyless bushing 14, ultimately transmitting power to the synchronous belt 12. Simultaneously, the magnetic powder brake 10-1 applies a controllable resistance torque to the X-axis driven pulley shaft 31 via the dynamic torque sensor 9-1, accurately simulating the load during actual operation of the CMM. During this process, the dynamic torque sensor 9-1 captures real-time torque fluctuations in the transmission shaft, the pressure sensor 7 monitors the overall tension of the synchronous belt, and the full-bridge strain gauges 8-1, 8-2, 8-3, and 8-4 are circumferentially equidistantly distributed on the synchronous belt surface, forming a distributed shear force monitoring system. All sensor signals are synchronously acquired via the data acquisition card 4. To accelerate degradation, operators periodically increase the feed by tightening the preload screw of the X-axis small pulley tensioning block 25, causing a step decrease in the preload of the X-axis wedge belt 16. This effectively simulates the actual working conditions of the transmission system during long-term operation, providing highly reliable data support for reliability design.

[0056] This invention presents a reliability accelerated degradation test device for a coordinate measuring machine transmission system. It addresses the problems in the current precision measurement field, such as the limited functionality of traditional coordinate measuring machines and the difficulty in simultaneously acquiring the multidimensional mechanical response of the measured object during spatial position changes. It also improves the integrated multi-parameter synchronous measurement capability, featuring a modular rapid maintenance structure and a disassembly-free precise calibration structure. It has promising application prospects in fields such as precision transmission and reliability monitoring.

[0057] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications, equivalent substitutions, and improvements made by those skilled in the art within the scope of the technology disclosed in the present invention, and within the spirit and principles of the present invention, should be included within the scope of protection of the present invention. Furthermore, all content not described in detail in this specification is prior art known to those skilled in the art.

Claims

1. A reliability accelerated degradation test device for a coordinate measuring machine transmission system, characterized in that: It consists of a processing system, a frame system, a measurement system, and a transmission system; The measurement system includes a driven wheel fixing plate (6), a pressure sensor (7), a No. 1 full-bridge strain gauge (8-1), a No. 2 full-bridge strain gauge (8-2), a No. 3 full-bridge strain gauge (8-3), a No. 4 full-bridge strain gauge (8-4), a dynamic torque sensor (9-1), a dynamic torque sensor fixing plate (9-2), a magnetic powder brake (10-1), and a magnetic powder brake fixing plate (10-2). The driven wheel fixing plate (6) is fixed on the aluminum frame (5-2) in the frame system. The pressure sensor (7) is fixed on the driven wheel fixing plate (6). The No. 1 full-bridge strain gauge (8-1), No. 2 full-bridge strain gauge (8-2), No. 3 full-bridge strain gauge (8-3), and No. 4 full-bridge strain gauge (8-4) are respectively fixed on the upper surface of the synchronous belt (12) in the transmission system. The dynamic torque sensor fixing plate (9-2) is fixed on the aluminum frame (5-2). The dynamic torque sensor (9-1) is fixed on the dynamic torque sensor fixing plate (9-2). The magnetic powder brake fixing plate (10-2) is fixed. On the aluminum frame (5-2), the magnetic powder brake (10-1) is fixed on the magnetic powder brake fixing plate (10-2). The No. 1 full-bridge strain gauge (8-1), No. 2 full-bridge strain gauge (8-2), No. 3 full-bridge strain gauge (8-3), and No. 4 full-bridge strain gauge (8-4) are connected to the data acquisition card (4) in the processing system via data lines. The pressure sensor (7) is connected to the data acquisition card (4) via data lines. The dynamic torque sensor (9-1) is connected to the data acquisition card (4) via data lines. The magnetic powder brake (10-1) is connected to the data acquisition card (4) via data lines.

2. The reliability accelerated degradation test device for a coordinate measuring machine transmission system according to claim 1, characterized in that: The processing system also includes a computer display screen (1-1), a computer host (1-2), a computer desk (2), and a keyboard (3); The computer desk (2) is installed on the ground to the left of the aluminum frame (5-2), and the computer screen (1-1), computer host (1-2), keyboard (3), and data acquisition card (4) are placed on the surface of the computer desk (2).

3. The reliability accelerated degradation test device for a coordinate measuring machine transmission system according to claim 1, characterized in that: The frame system includes a hood (5-1) and an aluminum frame (5-2); The aluminum frame (5-2) is installed on the ground, and the cover (5-1) and the aluminum frame (5-2) are connected by bolts, spring washers and nuts.

4. The reliability accelerated degradation test device for a coordinate measuring machine transmission system according to claim 1, characterized in that: The transmission system also includes a guide rail (11), an X-axis drive pulley shaft (13), a keyless bushing (14), an X-axis wedge belt large pulley (15), an X-axis wedge belt (16), a No. 1 reducer bearing cover (17), an X-axis drive pulley seat (18), an X-axis drive pulley fixing plate (19), a No. 1 DC servo motor (20), an aviation plug bracket (21), an X-axis small pulley bracket (22), a No. 1 DC servo motor seat (23), and an X-axis small pulley seat (24). 4) X-direction small pulley tensioning block (25), X-direction wedge belt small pulley shaft (26), X-direction small pulley bearing cover (27), driven pulley base (28), driven pulley seat (29), No. 2 reducer bearing cover (30), X-direction driven pulley shaft (31), No. 1 mounting base (32), No. 2 mounting base (33), synchronous belt pressure plate (34), No. 1 synchronous belt mounting plate (35), No. 2 synchronous belt mounting plate (36), pulley mounting plate (37); The guide rail (11) is fixed on the aluminum frame (5-2), and the synchronous belt (12) is pre-tightened and installed between the X-direction driving pulley shaft (13) and the X-direction driven pulley shaft (31); the X-direction driving pulley fixing plate (19) is fixed on the aluminum frame (5-2), the X-direction driving pulley seat (18) is fixed on the aluminum frame (5-2), the No. 1 reducer bearing cover (17) is fixed on the X-direction driving pulley seat (18), and the X-direction driving pulley shaft (13) is connected by a keyless bushing (14) and an X-direction wedge. The large pulley (15) is connected to the X-axis wedge belt (16), which is pre-tightened and installed between the X-axis wedge belt large pulley (15) and the X-axis wedge belt small pulley shaft (26). The X-axis small pulley bracket (22) is fixed on the aluminum frame (5-2). The X-axis small pulley seat (24) and the No. 1 DC servo motor seat (23) are fixed on the X-axis small pulley bracket (22) with the same screw. The No. 1 DC servo motor (20) is fixed on the No. 1 DC servo motor seat (23). The aviation plug bracket (21) The X-axis small pulley tensioning block (25) is fixed on the X-axis small pulley bracket (22), the X-axis wedge belt small pulley shaft (26) is connected to the DC servo motor (20) through a coupling, the X-axis small pulley bearing cover (27) is fixed on the X-axis small pulley seat (24); the driven pulley base (28) is fixed on the aluminum frame (5-2), the driven pulley seat (29) is fixed on the driven pulley base (28), and the No. 2 reducer bearing cover ( 30) Fixed on the driven pulley seat (29), the X-direction driven pulley shaft (31) is fixed to the driven pulley seat (29) through rolling bearings; No. 1 mounting base (32) is fixedly connected to No. 2 mounting base (33), No. 2 mounting base (33) is fixed on the trolley mounting plate (37), No. 2 synchronous belt mounting plate (36) and trolley mounting plate (37) are fixed, and synchronous belt pressure plate (34) and No. 1 synchronous belt mounting plate (35) are respectively fixed on No. 2 synchronous belt mounting plate (36).

5. The reliability accelerated degradation test device for a coordinate measuring machine transmission system according to claim 1, characterized in that: The dynamic torque sensor (9-1) is model DYN-200-D18, with a measurement range of 0-50 N*m. The magnetic powder brake (10-1) is model PB-5, with a measurement range of 0-50 N*m. The dynamic torque sensor (9-1) and the magnetic powder brake (10-1) are connected by a standard coupling. The No. 1 full-bridge strain gauge (8-1), No. 2 full-bridge strain gauge (8-2), No. 3 full-bridge strain gauge (8-3), and No. 4 full-bridge strain gauge (8-4) are all of the same model and specifications, and are evenly pasted on the upper surface of the synchronous belt (12) to ensure that it is flat and free of scratches. The pressure sensor is model FL34H, with a measurement range of 0-30000 N.

6. The reliability accelerated degradation test device for a coordinate measuring machine transmission system according to claim 1, characterized in that: The aluminum frame (5-2) is made of 83 hollow grooved rods connected together. Among them, there are 8 rods with a length of 3800mm, 31 rods with a length of 840mm, 8 rods with a length of 700mm, 20 rods with a length of 300mm, 8 rods with a length of 245mm, and 8 rods with a length of 150mm. All four sides perpendicular to the cross-section of the rods have grooves of the same size.

7. The reliability accelerated degradation test device for a coordinate measuring machine transmission system according to claim 4, characterized in that: The trolley mounting plate (37) is provided with a U-shaped hole and is connected to the No. 2 synchronous belt mounting plate (36) by bolts, washers and nuts. The synchronous belt pressure plate (34) and the No. 1 synchronous belt mounting plate (35) are respectively fixed on the No. 2 synchronous belt mounting plate (36). The upper and lower surfaces of the synchronous belt (12) are in close contact with the No. 2 synchronous belt mounting plate (36) and the synchronous belt pressure plate (34) respectively. The U-shaped hole of the trolley mounting plate (37) enables the entire device to move in the vertical direction, thereby reducing the drooping of the synchronous belt (12) in the vertical direction.

8. The reliability accelerated degradation test device for a coordinate measuring machine transmission system according to claim 4, characterized in that: The X-direction small pulley tensioning block (25) can achieve unidirectional feed movement through the pre-tightening screw. The pre-tightening screw is in direct contact with the X-direction wedge belt (16). By changing the pre-tightening degree of the pre-tightening screw, the pre-tightening degree of the X-direction wedge belt (16) can be changed, thereby changing the pre-tightening force of the transmission system.

9. The reliability accelerated degradation test device for a coordinate measuring machine transmission system according to claim 1, characterized in that: The vertical distance between the dynamic torque sensor fixing plate (9-2) and the magnetic powder brake fixing plate (10-2) is 95mm, thereby ensuring that the coaxiality error between the central axis of the dynamic torque sensor (9-1) and the central axis of the magnetic powder brake (10-1) is less than Φ2mm; the No.1 full-bridge strain gauge (8-1), the No.2 full-bridge strain gauge (8-2), the No.3 full-bridge strain gauge (8-3), and the No.4 full-bridge strain gauge (8-4) are assembled in parallel, and the parallelism error is less than or equal to 0.01mm.

10. The test method for the reliability accelerated degradation test device of a coordinate measuring machine transmission system according to claim 4, characterized in that: The No. 1 DC servo motor (20) drives the small pulley shaft (26) of the X-direction wedge belt, which drives the large pulley (15) of the X-direction wedge belt through the X-direction wedge belt (16) and the keyless bushing (14), and finally transmits the power to the synchronous belt (12); The magnetic powder brake (10-1) applies a controllable resistance torque to the driven pulley shaft (31) in the X direction through the dynamic torque sensor (9-1), which accurately simulates the load in the actual operation of the coordinate measuring machine. The dynamic torque sensor (9-1) captures the torque fluctuation of the drive shaft in real time, the pressure sensor (7) monitors the overall tension state of the synchronous belt, and the No. 1 full-bridge strain gauge (8-1), No. 2 full-bridge strain gauge (8-2), No. 3 full-bridge strain gauge (8-3), and No. 4 full-bridge strain gauge (8-4) are attached to the surface of the synchronous belt in a circumferentially equidistant manner to construct a distributed shear force monitoring system. All sensor signals are synchronously acquired through the data acquisition card (4); By increasing the feed amount through the preload screw of the X-axis small pulley tensioning block (25), the preload force of the X-axis wedge belt (16) is reduced by a step, simulating the actual working conditions of the transmission system during long-term operation.

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