A precision part checking device with self-maintenance function

Abstract

The present application relates to a kind of precision parts checking device with self-maintenance function, belong to precision parts detection technical field.It includes: rack, function installation area and self-maintenance operation area are arranged on rack, and installation support base is provided for each component of device;Jig placement table is fixedly installed at one end of the function installation area of rack;Detection station is set in the middle of the function installation area of rack, and is distributed with interval with jig placement table;Transfer module is slidably installed at the top of the function installation area of rack, and transfer module includes moving mechanism and clamping execution part, moving mechanism drives clamping execution part to reciprocate between jig placement table and detection station, and clamping execution part is pneumatic gripper structure;Self-maintenance unit is set in the self-maintenance operation area of rack, including clamping force calibration component and gasket replacement component, and the origin of pneumatic gripper is positioned and clamping force is calibrated, to carry out the disassembly and replacement of worn gasket on pneumatic gripper.

Description

Technical Field

[0001] This invention belongs to the field of precision parts testing technology, and specifically relates to a precision parts calibration device with self-maintenance function. Background Technology

[0002] Precision drill bits are core machining components in fields such as machining, aerospace, and precision manufacturing. Their concentricity and dimensional accuracy directly determine the quality of the machined workpiece. Therefore, after machining, precision drill bits need to undergo precise testing of their core parameters using specialized equipment. Currently, the industry commonly uses a combination of visual inspection and laser inspection to verify the concentricity and dimensions of precision drill bits. During the inspection process, pneumatic grippers are used to clamp and transport the drill bit from the transfer fixture to the inspection station. Pneumatic grippers have become the mainstream transfer actuator due to their fast clamping response and controllable force.

[0003] Existing technologies have at least the following problems during use: the gripping end pads of pneumatic grippers are prone to wear during repeated gripping, transporting, and releasing of precision drill bits, resulting in unreliable gripping. Existing precision parts inspection devices lack a dedicated origin gripping force calibration structure and an automatic pad replacement structure for pneumatic grippers. Manual shutdown is required for calibration and pad replacement, which not only reduces inspection efficiency but also easily leads to improper adjustment of gripping force due to human operation errors, causing precision drill bits to fall and be damaged during transport or causing inspection positioning deviations, thus affecting inspection accuracy. Summary of the Invention

[0004] This invention provides a precision parts calibration device with self-maintenance function, which solves the technical problem that the prior art requires manual shutdown for calibration and shim replacement.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: A precision parts calibration device with self-maintenance function includes: a frame, on which a functional mounting area and a self-maintenance operation area are arranged, providing a mounting support foundation for each component of the device; a fixture placement platform, fixedly installed at one end of the functional mounting area of ​​the frame, for placing a transfer fixture loaded with a precision drill bit, the fixture placement platform having a positioning structure to limit and fix the transfer fixture; a testing station, located in the middle of the functional mounting area of ​​the frame, spaced apart from the fixture placement platform, the testing station integrating testing components for testing the concentricity and dimensional parameters of the precision drill bit; and a transfer module, sliding... The transfer module is mounted on top of the functional installation area of ​​the frame. It includes a moving mechanism and a clamping actuator. The moving mechanism drives the clamping actuator to reciprocate between the fixture placement table and the inspection station. The clamping actuator is a pneumatic gripper structure used to clamp and transfer precision drill bits. The self-maintenance unit is located in the self-maintenance operation area of ​​the frame and is adapted to the movement trajectory of the transfer module. The self-maintenance unit includes a clamping force calibration component and a shim replacement component. The clamping force calibration component realizes the origin positioning and clamping force calibration of the pneumatic gripper, and the shim replacement component realizes the removal and replacement of worn shims on the pneumatic gripper.

[0006] Furthermore, the moving mechanism includes a linear slide rail module and a rotary mounting base. The linear slide rail module is arranged along the length of the functional mounting area of ​​the frame. The rotary mounting base is slidably mounted on the slide table of the linear slide rail module. The clamping actuator is fixedly mounted on the rotary mounting base. The rotary mounting base drives the clamping actuator to rotate 0-360° around the vertical axis.

[0007] Furthermore, the clamping actuator includes a jaw body, two symmetrically distributed movable grippers, a wear-resistant pad, and a pneumatic pressure regulator. The movable grippers are hinged to the output end of the jaw body, the wear-resistant pad is detachably fitted to the gripping end of the movable grippers, and the pneumatic pressure regulator is connected to the air passage of the jaw body to adjust the clamping air pressure of the pneumatic gripper.

[0008] Furthermore, the clamping force calibration component includes a calibration platform, an origin positioning block, a pressure detection sensor, and a calibration controller. The calibration platform is fixedly installed in the self-maintenance operation area of ​​the frame. The origin positioning block is set at the center of the calibration platform and is used to perform origin positioning of the pneumatic gripper. The pressure detection sensor is embedded in the clamping contact surface of the origin positioning block. The calibration controller is electrically connected to the pressure detection sensor and the air pressure regulator. The pressure detection sensor collects the clamping force data of the pneumatic gripper and transmits it to the calibration controller. The calibration controller adjusts the output air pressure of the air pressure regulator according to a preset threshold.

[0009] Furthermore, the gasket replacement assembly includes a gasket storage bin, a pushing mechanism, a disassembly chuck, and an installation drive. The gasket storage bin is fixedly installed on one side of the calibration table and is used to store spare wear-resistant gaskets. The pushing mechanism is located at the outlet of the gasket storage bin and is used to push the spare wear-resistant gaskets to the replacement station. The disassembly chuck is connected to the installation drive, and the installation drive drives the disassembly chuck to perform translational and clamping movements. The disassembly chuck realizes the disassembly of the worn wear-resistant gasket and the installation of the spare wear-resistant gasket.

[0010] Furthermore, the inspection components include a vision inspection module and a laser inspection module. The vision inspection module includes an industrial CCD camera and a ring-shaped supplementary light source. The industrial CCD camera is set facing the inspection station to collect image information on the appearance and concentricity of the precision drill bit. The laser inspection module includes a laser emitter and a laser receiver, which are symmetrically distributed on both sides of the inspection station to inspect the dimensional parameters such as the outer diameter and length of the precision drill bit.

[0011] Furthermore, the positioning structure of the fixture placement platform includes a positioning pin and a pneumatic clamping block. The positioning pin is adapted to the positioning hole at the bottom of the transfer fixture. The pneumatic clamping blocks are symmetrically distributed on both sides of the fixture placement platform. The clamping end of the pneumatic clamping block abuts against the side wall of the transfer fixture to fix the transfer fixture.

[0012] Furthermore, it also includes a central control unit, which is electrically connected to the transfer module, the inspection station, and the self-maintenance unit. The central control unit has a built-in control program to realize the automated linkage control of precision drill bit transfer, inspection, pneumatic gripper self-calibration, and shim self-replacement. The central control unit also has a data storage module for storing inspection data and self-maintenance records.

[0013] This invention provides a precision parts calibration device with self-maintenance function. Its advantages include: 1) Automated transfer of precision drill bits from the transfer fixture to the inspection station is achieved through a linkage structure between the transfer module and the inspection station; 2) High-precision detection of drill bit concentricity and dimensions is achieved through the collaborative work of vision and laser inspection modules; 3) Precise positioning of the pneumatic gripper's origin and automatic calibration of the clamping force are achieved by incorporating a clamping force calibration component in the self-maintenance unit, which adjusts the clamping air pressure in real time based on the inspection data, effectively solving the problem of unreliable clamping caused by shim wear; 4) Automated disassembly and replacement of worn shims in the pneumatic gripper is achieved by incorporating a shim replacement component, eliminating the need for manual shutdown and significantly improving the device's continuous operation capability and inspection efficiency; 5) Precise positioning and fixing of the transfer fixture are achieved through the cooperation of the positioning pins on the fixture placement platform and the pneumatic clamping block, ensuring the accurate positioning of the drill bit by the pneumatic gripper and reducing transfer deviation; 6) Automated linkage control of all components is achieved through the central control unit, which stores inspection data and self-maintenance records, facilitating subsequent equipment maintenance and inspection data traceability. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of a precision parts inspection device with self-maintenance function provided in an embodiment of the present invention; Figure 2 A top view of a precision parts inspection device with self-maintenance function provided in an embodiment of the present invention; Figure 3 A cross-sectional view of the transfer module provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the gasket replacement assembly provided in an embodiment of the present invention; Figure 5 for Figure 4 Enlarged view of point A1 in the middle.

[0016] In the diagram: 1-Frame; 4-Jig placement platform; 5-Transfer jig; 6-Inspection station; 7-Transfer module; 11-Clamping force calibration component; 12-Gasket replacement component; 13-Linear slide rail module; 14-Rotary mounting base; 15-Gripper body; 16-Modible gripper finger; 17-Wear-resistant gasket; 18-Air pressure regulator; 19-Calibration table; 20-Origin positioning block; 21-Pressure detection sensor; 22-Calibration controller; 23-Gasket storage bin; 24-Pushing mechanism; 25-Disassembly chuck; 26-Installation drive component; 27-Vision inspection module; 28-Laser inspection module; 29-Industrial CCD camera; 30-Ring supplementary light source; 31-Laser emitter; 32-Laser receiver; 33-Positioning pin; 34-Pneumatic clamping block; 35-Inspection table. Detailed Implementation

[0017] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0018] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0019] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0020] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to welding, bolting, or riveting; they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0021] Example: like Figures 1 to 5 As shown, this embodiment provides a precision parts calibration device with self-maintenance function, including: a frame 1, on which a functional installation area and a self-maintenance operation area are arranged to provide a mounting support foundation for each component of the device; a fixture placement platform 4, fixedly installed at one end of the functional installation area of ​​the frame 1, for placing a transfer fixture 5 loaded with a precision drill bit, the fixture placement platform 4 having a positioning structure to limit and fix the transfer fixture 5; a testing station 6, located in the middle of the functional installation area of ​​the frame 1, spaced apart from the fixture placement platform 4, the testing station 6 integrating a testing component for testing the concentricity and dimensional parameters of the precision drill bit; and a transfer module. 7. Slidingly mounted on the top of the functional installation area of ​​the frame 1, the transfer module 7 includes a moving mechanism and a clamping actuator. The moving mechanism drives the clamping actuator to reciprocate between the fixture placement table 4 and the inspection station 6. The clamping actuator is a pneumatic gripper structure used to clamp and transfer precision drill bits. The self-maintenance unit is set in the self-maintenance operation area of ​​the frame 1 and is adapted to the moving trajectory of the transfer module 7. The self-maintenance unit includes a clamping force calibration component 11 and a shim replacement component 12. The clamping force calibration component 11 realizes the origin positioning and clamping force calibration of the pneumatic gripper, and the shim replacement component 12 realizes the disassembly and replacement of the worn shims on the pneumatic gripper.

[0022] In this embodiment, the frame 1 is made of 6061 aluminum alloy, formed by CNC machining and welding, and the whole is anodized for corrosion protection. The functional installation area and the self-maintenance operation area are separated by metal partitions to avoid interference between the inspection and maintenance operations. The bottom of the frame 1 is equipped with leveling pads to ensure the horizontal stability of the device. The overall working stroke of the device is designed according to the conventional processing batch of precision drill bits. The distance between the fixture placement table 4 and the inspection station 6 is 800mm, and the distance between the self-maintenance operation area and the inspection station 6 is 500mm, which meets the requirements of automated transfer operation.

[0023] Furthermore, the moving mechanism includes a linear slide rail module 13 and a rotary mounting base 14. The linear slide rail module 13 is arranged along the length of the functional installation area of ​​the frame 1. The rotary mounting base 14 is slidably mounted on the slide table of the linear slide rail module 13. The clamping actuator is fixedly mounted on the rotary mounting base 14. The rotary mounting base 14 drives the clamping actuator to rotate 0-360° around the vertical axis.

[0024] In this embodiment, the linear guide module 13 adopts a ball screw linear module driven by a servo motor, with an effective stroke of 1500mm and a positioning accuracy of ±0.01mm, which meets the positioning requirements for precision drill bit transfer; the rotary mounting base 14 adopts a worm gear rotary structure driven by a stepper motor, with a rotation angle accuracy of ±0.5°, which can drive the pneumatic gripper to rotate according to the detection requirements, adjust the detection angle of the precision drill bit, and enable the detection module to collect images and dimensional data of the entire circumference of the drill bit.

[0025] Furthermore, the clamping actuator includes a jaw body 15, two symmetrically distributed movable grippers 16, a wear-resistant pad 17, and a pneumatic pressure regulating component 18. The movable grippers 16 are hinged to the output end of the jaw body 15. The wear-resistant pad 17 is detachably fitted to the gripping end of the movable grippers 16. The pneumatic pressure regulating component 18 is connected to the air passage of the jaw body 15 and is used to regulate the clamping air pressure of the pneumatic gripper.

[0026] In this embodiment, the gripper body 15 adopts a parallel pneumatic gripper structure with a working air pressure range of 0.2-0.8MPa and a gripping stroke of 0-50mm, adapting to the gripping requirements of different specifications of precision drill bits; the gripping end of the movable gripper finger 16 is treated with an arc chamfer to avoid scratching the surface of the precision drill bit; the wear-resistant pad 17 is made of polyurethane wear-resistant rubber material with a thickness of 5mm, and is detachably connected to the movable gripper finger 16 through a snap-fit ​​structure for easy replacement; the polyurethane material has both wear resistance and elasticity, which can ensure the reliability of the gripping and avoid damaging the drill bit; the air pressure regulating component 18 is an electronic proportional pressure regulating valve, which can achieve fine air pressure adjustment of 0.01MPa to accurately control the gripping force.

[0027] Furthermore, the clamping force calibration assembly 11 includes a calibration platform 19, an origin positioning block 20, a pressure detection sensor 21, and a calibration controller 22. The calibration platform 19 is fixedly installed in the self-maintenance operation area of ​​the frame 1. The origin positioning block 20 is set at the center of the calibration platform 19 and is used to perform origin positioning of the pneumatic gripper. The pressure detection sensor 21 is embedded in the clamping contact surface of the origin positioning block 20. The calibration controller 22 is electrically connected to the pressure detection sensor 21 and the air pressure regulator 18. The pressure detection sensor 21 collects the clamping force data of the pneumatic gripper and transmits it to the calibration controller 22. The calibration controller 22 adjusts the output air pressure of the air pressure regulator 18 according to a preset threshold.

[0028] In this embodiment, the calibration platform 19 is made of stainless steel with a polished surface. The origin positioning block 20 is made of polytetrafluoroethylene, and the size of its clamping contact surface is adapted to the outer diameter of a standard precision drill bit. The pressure detection sensor 21 is a miniature diaphragm pressure sensor with a range of 0-500N and a detection accuracy of ±0.1N, which can accurately collect the clamping force data of the pneumatic gripper. The calibration controller 22 is an embedded microcontroller with a built-in database of preset clamping force thresholds. It presets corresponding clamping force ranges for different specifications of precision drill bits. When the clamping force is detected to be lower than the preset threshold, the air pressure regulator 18 is automatically controlled to increase the output air pressure. When the clamping force is higher than the preset threshold, the air pressure is reduced to achieve closed-loop automatic calibration of the clamping force. At the same time, when the clamping force cannot reach the preset threshold after multiple adjustments, it is determined that the shim is severely worn, and a shim replacement signal is sent to the central control unit.

[0029] Furthermore, the gasket replacement assembly 12 includes a gasket storage bin 23, a pushing mechanism 24, a disassembly chuck 25, and an installation drive 26. The gasket storage bin 23 is fixedly installed on one side of the calibration table 19 and is used to store spare wear-resistant gaskets 17. The pushing mechanism 24 is located at the outlet of the gasket storage bin 23 and is used to push the spare wear-resistant gaskets 17 to the replacement station. The disassembly chuck 25 is connected to the installation drive 26. The installation drive 26 drives the disassembly chuck 25 to perform translational and clamping movements. The disassembly chuck 25 realizes the disassembly of the worn wear-resistant gasket 17 and the installation of the spare wear-resistant gasket 17.

[0030] In this embodiment, the pad storage bin 23 is a drawer-type structure that can store 20 sets of spare wear-resistant pads 17. The pads are classified and stored to fit different specifications of drill bits. A photoelectric sensor is installed at the discharge port to detect the remaining pads. When the remaining pads are insufficient, an alarm signal is issued. The pushing mechanism 24 is an electric push rod with a stroke of 20mm and a thrust of 50N, which can smoothly push the spare pads to the replacement station. The disassembly chuck 25 is a miniature pneumatic gripper with a clamping force of 30N, which can accurately pick up the worn pads to achieve snap-on disassembly. The installation drive 26 is a three-axis miniature linear module with a positioning accuracy of ±0.02mm. It drives the disassembly chuck 25 to complete the disassembly of the worn pads and the installation of the spare pads. The entire replacement process is fully automatic, and the time for a single replacement is no more than 10 seconds.

[0031] Furthermore, the inspection components include a vision inspection module 27 and a laser inspection module 28. The vision inspection module 27 includes an industrial CCD camera 29 and a ring-shaped supplementary light source 30. The industrial CCD camera 29 is set facing the inspection table 35 of the inspection station 6 and is used to collect image information on the appearance and concentricity of the precision drill bit. The laser inspection module 28 includes a laser emitter 31 and a laser receiver 32, which are symmetrically distributed on both sides of the inspection table 35 and are used to inspect the dimensional parameters such as the outer diameter and length of the precision drill bit.

[0032] In this embodiment, the detection platform 35 is a vacuum adsorption type detection platform 35, which can vacuum adsorb and fix the precision drill bit to avoid drill bit displacement during the detection process. The adsorption surface of the detection platform 35 has air-permeable micropores, and the adsorption force is adjustable. The industrial CCD camera 29 is a 20-megapixel high-definition industrial camera, equipped with a telecentric lens, and a shooting frame rate of 30fps. The ring light source 30 is an LED shadowless light source with adjustable brightness, which effectively avoids image acquisition errors caused by reflection on the drill bit surface. The image information acquired by the camera is processed by an image recognition algorithm to achieve accurate detection of the drill bit concentricity with a detection accuracy of ±0.001mm. The laser detection module 28 is a laser diameter gauge with a detection range of 0.5-50mm and a detection accuracy of ±0.0005mm. It can detect the outer diameter, taper, length and other dimensional parameters of the precision drill bit in real time. The data from visual inspection and laser inspection are transmitted to the central control unit in real time for analysis and judgment.

[0033] Furthermore, the positioning structure of the fixture placement platform 4 includes a positioning pin 33 and a pneumatic clamping block 34. The positioning pin 33 is adapted to the positioning hole at the bottom of the transfer fixture 5. The pneumatic clamping blocks 34 are symmetrically distributed on both sides of the fixture placement platform 4. The clamping end of the pneumatic clamping block 34 abuts against the side wall of the transfer fixture 5 to fix the transfer fixture 5.

[0034] In this embodiment, the positioning pin 33 is a cylindrical positioning pin 33 with an accuracy of h6. Four positioning pins 33 are set according to the specifications of the transfer fixture 5 and are arranged in a rectangular shape to achieve precise positioning of the transfer fixture 5. The clamping end of the pneumatic clamping block 34 is wrapped with a rubber buffer pad to avoid damage to the transfer fixture 5 during clamping. The working air pressure of the clamping block is 0.4MPa and the clamping force is 100N, which can firmly fix the transfer fixture 5 on the fixture placement table 4 and ensure the positioning accuracy of the pneumatic chuck when clamping the drill bit from the fixture.

[0035] Furthermore, it also includes a central control unit, which is electrically connected to the transfer module 7, the inspection station 6, and the self-maintenance unit. The central control unit has a built-in control program to realize the automated linkage control of precision drill bit transfer, inspection, pneumatic gripper self-calibration, and shim self-replacement. The central control unit is also equipped with a data storage module for storing inspection data and self-maintenance records.

[0036] In this embodiment, the central control unit uses a PLC programmable logic controller as the core control module, paired with a touch screen human-machine interface. Operators can set detection parameters, clamping force thresholds, and work processes via the touch screen, and can also view detection data, equipment operating status, and self-maintenance records in real time. The data storage module is an industrial-grade memory card, capable of storing no less than 100,000 detection data and self-maintenance records, supporting USB flash drive export and data network upload, facilitating subsequent quality traceability and equipment maintenance. The central control unit also has a fault alarm module. When the device experiences problems such as abnormal clamping of the grippers, insufficient shim margin, or detection module failure, it will alert the operator through audible and visual alarms, and automatically shut down the machine for protection, preventing equipment damage and scrapping of precision drill bits.

[0037] In summary, this invention patent achieves automated and high-precision transport of precision drill bits through a transport module composed of a linear slide rail module and a rotary mounting base. Combined with the collaborative work of vision and laser detection modules, it enables multi-dimensional high-precision detection of drill bit concentricity and dimensions, effectively improving detection efficiency and accuracy. By setting up a clamping force calibration component, it achieves origin positioning of the pneumatic grippers and closed-loop automatic calibration of the clamping force, adjusting the clamping air pressure in real time according to the wear of the shims, fundamentally solving the problem of unreliable clamping caused by shim wear. The shim replacement component enables automated disassembly and replacement of worn shims without manual shutdown, significantly improving the continuous operation capability of the device and reducing manual maintenance costs. The precise positioning structure of the fixture placement table and the vacuum adsorption structure of the detection table ensure the positioning accuracy of the precision drill bits during transport and detection, effectively reducing detection deviations. The central control unit achieves automated linkage control of all components and stores and traces detection data and self-maintenance records, making the device's operation process more intelligent and standardized, meeting the high standards and high efficiency requirements of precision manufacturing for precision drill bit detection.

[0038] 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 variations or substitutions that can be easily conceived by those skilled in the art within the technical scope described in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A precision parts calibration device with self-maintenance function, characterized in that, include: The frame (1) is provided with a functional installation area and a self-maintenance operation area, which provide an installation support foundation for each component of the device; A fixture placement platform (4) is fixedly installed at one end of the functional installation area of ​​the frame (1) for placing a transfer fixture (5) loaded with precision drill bits. The fixture placement platform (4) is provided with a positioning structure to limit and fix the transfer fixture (5). A testing station (6) is located in the middle of the functional installation area of ​​the frame (1) and is distributed at intervals with the fixture placement platform (4). The testing station (6) integrates a testing component for testing the concentricity and dimensional parameters of the precision drill bits. A transfer module (7) is slidably installed on the top of the functional installation area of ​​the frame (1). The transfer module (7) includes a moving mechanism and a clamping mechanism. The clamping actuator is driven by the moving mechanism to reciprocate between the fixture placement platform (4) and the inspection station (6). The clamping actuator is a pneumatic gripper structure used to clamp and transfer precision drill bits. The self-maintenance unit is set in the self-maintenance work area of ​​the frame (1) and is adapted to the movement trajectory of the transfer module (7). The self-maintenance unit includes a clamping force calibration component (11) and a shim replacement component (12). The clamping force calibration component (11) realizes the origin positioning and clamping force calibration of the pneumatic gripper. The shim replacement component (12) realizes the disassembly and replacement of the worn shims on the pneumatic gripper.

2. The precision parts calibration device with self-maintenance function according to claim 1, characterized in that, The moving mechanism includes a linear slide rail module (13) and a rotary mounting base (14). The linear slide rail module (13) is arranged along the length of the functional installation area of ​​the frame (1). The rotary mounting base (14) is slidably mounted on the slide table of the linear slide rail module (13). The clamping actuator is fixedly mounted on the rotary mounting base (14). The rotary mounting base (14) drives the clamping actuator to rotate 0-360° around the vertical axis.

3. A precision parts calibration device with self-maintenance function according to claim 2, characterized in that, The clamping actuator includes a jaw body (15), two symmetrically distributed movable grippers (16), a wear-resistant pad (17), and a pneumatic pressure regulator (18). The movable grippers (16) are hinged to the output end of the jaw body (15). The wear-resistant pad (17) is detachably fitted to the gripping end of the movable grippers (16). The pneumatic pressure regulator (18) is connected to the air passage of the jaw body (15) and is used to adjust the clamping air pressure of the pneumatic jaw.

4. A precision parts calibration device with self-maintenance function according to claim 3, characterized in that, The clamping force calibration component (11) includes a calibration platform (19), an origin positioning block (20), a pressure detection sensor (21), and a calibration controller (22). The calibration platform (19) is fixedly installed in the self-maintenance operation area of ​​the frame (1). The origin positioning block (20) is set at the center of the calibration platform (19) for origin positioning of the pneumatic gripper. The pressure detection sensor (21) is embedded in the clamping contact surface of the origin positioning block (20). The calibration controller (22) is electrically connected to the pressure detection sensor (21) and the air pressure regulator (18). The pressure detection sensor (21) collects the clamping force data of the pneumatic gripper and transmits it to the calibration controller (22). The calibration controller (22) adjusts the output air pressure of the air pressure regulator (18) according to a preset threshold.

5. A precision parts calibration device with self-maintenance function according to claim 4, characterized in that, The gasket replacement assembly (12) includes a gasket storage bin (23), a pushing mechanism (24), a disassembly chuck (25), and an installation drive (26). The gasket storage bin (23) is fixedly installed on one side of the calibration table (19) and is used to store spare wear-resistant gaskets (17). The pushing mechanism (24) is located at the outlet of the gasket storage bin (23) and is used to push the spare wear-resistant gaskets (17) to the replacement station. The disassembly chuck (25) is connected to the installation drive (26). The installation drive (26) drives the disassembly chuck (25) to perform translation and clamping movements. The disassembly chuck (25) realizes the disassembly of the worn wear-resistant gaskets (17) and the installation of spare wear-resistant gaskets (17).

6. A precision parts calibration device with self-maintenance function according to claim 5, characterized in that, The detection components include a vision detection module (27) and a laser detection module (28). The vision detection module (27) includes an industrial CCD camera (29) and a ring-shaped supplementary light source (30). The industrial CCD camera (29) is set facing the detection table (35) of the detection station (6) and is used to collect image information of the appearance and concentricity of the precision drill bit. The laser detection module (28) includes a laser emitting end (31) and a laser receiving end (32), which are symmetrically distributed on both sides of the detection table (35) and are used to detect the outer diameter, length and other dimensional parameters of the precision drill bit.

7. A precision parts calibration device with self-maintenance function according to claim 6, characterized in that, The positioning structure of the fixture placement platform (4) includes a positioning pin (33) and a pneumatic clamping block (34). The positioning pin (33) is adapted to the positioning hole at the bottom of the transfer fixture (5). The pneumatic clamping blocks (34) are symmetrically distributed on both sides of the fixture placement platform (4). The clamping end of the pneumatic clamping block (34) abuts against the side wall of the transfer fixture (5) to fix the transfer fixture (5).

8. A precision parts calibration device with self-maintenance function according to claim 7, characterized in that, It also includes a central control unit, which is electrically connected to the transfer module (7), the inspection station (6), and the self-maintenance unit. The central control unit has a built-in control program to realize the automated linkage control of precision drill bit transfer, inspection, pneumatic gripper self-calibration, and shim self-replacement. The central control unit is also equipped with a data storage module for storing inspection data and self-maintenance records.

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