A high-precision reverse broaching tool with clamping

Abstract

This invention discloses a snap-fit ​​high-precision countersinking tool for use in the field of countersinking tools, including a radial tool delivery transmission structure. The radial tool delivery transmission structure includes a tool slide that meshes with a toothed gear and a half-tooth gear. The tool slide achieves radial tool delivery via a transmission shaft and transmission components, and returns to its original position after delivery with the help of a tension spring. It also includes a pressure sensor and a sensing column for detecting displacement pressure changes, and a tool feed control unit that adjusts the position of the support unit via a cylinder insert. This improves machining accuracy and efficiency, ensuring that the tool body accurately reaches the preset working height each time it is delivered, effectively reducing machining depth deviation caused by tool wear. Simultaneously, the pressure detection of the sensing unit and the closed-loop feedback mechanism of the tool feed control unit enable real-time verification and automatic compensation of tool displacement, effectively reducing manual intervention and downtime.

Description

Technical Field

[0001] This invention relates to the field of countersinking tools, and particularly to a snap-fit ​​high-precision countersinking tool. Background Technology

[0002] Countersinking tools are specialized tools used for machining countersunk surfaces and stepped surfaces on the back of workpieces or the inside of holes. They are widely used in the automotive, aerospace, and construction machinery industries to address machining needs that conventional countersinking cannot reach. Based on structure, they are classified into integral, adjustable, and split types: integral types offer high rigidity and precision, suitable for machining countersunk heads of fixed specifications; adjustable types adapt to different diameter countersunk heads through radial adjustment of the insert, offering good flexibility; split types consist of a tool holder and a replaceable countersink head, allowing for machining of multiple specifications by changing the head, thus reducing costs. Materials are mostly high-speed steel, cemented carbide, or coated materials, suitable for workpiece materials such as steel, aluminum alloy, and titanium alloy, ensuring both surface roughness and dimensional accuracy.

[0003] Chinese invention CN114178629A discloses a mechanical automatic switching back scraping tool for machining reverse countersinking or counterboring, which realizes the automated machining task of reverse counterboring or countersinking, solves the tedious work of installing and removing the tool head when machining each hole, as well as the secondary clamping and flipping of the workpiece, saves a lot of auxiliary time, is conducive to high machining efficiency, and reduces the operational risks caused by tool changing, while utilizing wireless sensing detection.

[0004] Chinese invention CN113369591B discloses a tool for scraping the front and back sides of a box wall through hole. The invention has a friction bushing and a protective bushing pressed and fixed on both ends of a base bushing. The protective bushing passes through the corresponding box wall through hole. The end cap, support column, cutter head, base bushing, friction bushing and protective bushing are fixedly connected as a whole. It is suitable for processing various types of box bodies and has good versatility.

[0005] When back-countering is used for machining, the machining accuracy largely depends on the accuracy of the table's movement coordinates. The back-and-forth movement of the table inevitably produces return errors, which cannot be effectively compensated for after tool wear, resulting in deviations in machining depth. This makes it difficult to maintain stable high-precision machining requirements, thus affecting both workpiece quality and machining efficiency. Summary of the Invention

[0006] The core of this invention lies in the synergistic effect of an upper limit block with a sensing column, a lower support block with a fixing unit and a support unit, and a tool feed control unit to solve the problems of insufficient precision and ineffective compensation for wear in existing back-counting tools. It also achieves high-precision back-counting machining and automatic compensation for tool wear.

[0007] To solve the above problems, the present invention adopts the following technical solution.

[0008] A snap-fit ​​high-precision countersinking tool includes a tool holder body and a tool accessory mounted on the tool holder body. The tool holder body includes a housing, one end of which has a groove, and a tool slide is slidably connected in the groove. The end of the housing away from the tool slide is connected to a drive shaft. A half-tooth gear is rotatably connected to the bottom end of the groove. One end of the tool slide has a tooth groove that matches the half-tooth gear. A transmission component is connected between the drive shaft and the half-tooth gear. The tool slide includes a mounting plate, one end of which is connected to a slider body that slides relative to the groove. The other end of the mounting plate has a strip groove for mounting the tool accessory and multiple pairs of evenly distributed fixing grooves.

[0009] The upper and lower ends of the slide are fixedly connected to an upper limit block and a lower support block, respectively; the lower end of the upper limit block is fixedly connected to a sensing column, and when the tool slide is driven by the half-tooth gear to move to the maximum displacement, it fits against the sensing column; the lower support block has two mounting holes, and a fixing unit and a support unit are connected in the two mounting holes, respectively. A tension spring is connected between the fixing unit and the tool slide, and the tool slide fits against the support unit after being reset by the tension spring.

[0010] An anti-rotation attachment is fixedly connected to the lower end of the housing, and a feed control unit that matches the support unit is connected to the top of the anti-rotation attachment. The feed control unit is used to adjust the position of the support unit.

[0011] Furthermore, the transmission assembly includes a transmission shaft rotatably connected within the housing, with a tool holder rod and a drive gear connected to both ends of the transmission shaft, and a gear, worm, and worm wheel shaft for transmission connected between the drive gear and the half gear, with the worm wheel shaft meshing with the half gear.

[0012] Furthermore, the tool accessory includes a base plate, on which a damping slider matching the strip groove is fixedly connected, and an internal threaded connector is fixedly connected to the base plate. A fixing screw is detachably connected between the base plate and the fixing groove, and the tool body is threadedly connected to the internal threaded connector.

[0013] Furthermore, the sensing column includes a movable column, and the lower end of the upper limit block is provided with a limiting groove that matches the movable column. The bottom end of the limiting groove is connected to a sensing unit, and a compression spring is connected between the sensing unit and the movable column. A pressure sensor is integrated on the sensing unit, and the sensing unit is electrically connected to the feed control unit.

[0014] Furthermore, the mounting hole includes a lower half with internal threads and a smooth upper half, with the inner diameter of the lower half being larger than that of the upper half.

[0015] Furthermore, the fixing unit is threaded to the lower half of the mounting hole, the support unit is slidably connected to the upper half of the mounting hole, and a support cover is provided on the lower side of the support unit that is threaded to the lower half of the mounting hole, with a round hole in the middle of the support cover.

[0016] Furthermore, the feed control unit includes a cylinder, and the telescopic end of the cylinder is connected to a pin that matches the round hole.

[0017] Furthermore, it also includes a feed compensation system, which includes a terminal processor electrically connected to the feed control unit. The terminal processor is connected to a data acquisition module, a data processing module, a control module, and a data storage module.

[0018] The data acquisition module is used to collect pressure data from the sensing column and status data from the feed control unit;

[0019] The data processing module is used to analyze and calculate the data collected by the data acquisition module to determine whether the number of cuts and the adjustment accuracy meet the requirements.

[0020] The control module sends an execution command to the feed control unit based on the output of the data processing module, and adjusts the position of the support unit to compensate for the tool exit distance.

[0021] The data storage module is used to store the basic parameters, real-time data and historical records required for system operation.

[0022] Compared with the prior art, the advantages of this invention are:

[0023] (1) This solution improves machining accuracy and efficiency by using a radial automatic tool slide and an adjustable tool slide reset position lower support block; it can ensure that the tool body can accurately reach the preset working height each time it is deployed, thus avoiding machining depth deviation caused by tool wear.

[0024] (2) Through the pressure detection of the sensing unit and the closed-loop feedback mechanism of the feed control unit, the real-time verification and automatic compensation of the tool displacement are realized, which effectively reduces manual intervention and downtime. Attached Figure Description

[0025] Figure 1 This is a perspective view of the present invention;

[0026] Figure 2 for Figure 1 Schematic diagram of the structure at point A;

[0027] Figure 3 This is a top view of the present invention;

[0028] Figure 4 This is a half-sectional view of the side of the present invention;

[0029] Figure 5 for Figure 4 Schematic diagram of the structure at point B;

[0030] Figure 6 for Figure 4Schematic diagram of the structure at point C;

[0031] Figure 7 This is a top cross-sectional view of the present invention.

[0032] Explanation of the labels in the diagram:

[0033] 1. Housing; 11. Half-tooth gear; 12. Drive shaft; 2. Tool slide; 21. Mounting plate; 22. Slider body; 3. Upper limit block; 31. Sensing column; 311. Movable column; 312. Sensing unit; 4. Lower support block; 41. Fixing unit; 42. Support unit; 421. Support cover; 5. Tool accessory; 51. Base plate; 52. Internal threaded connector; 53. Tool body; 6. Anti-rotation accessory; 7. Feed control unit; 71. Cylinder. Detailed Implementation

[0034] The technical solutions will now be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention.

[0035] First implementation method:

[0036] Please see Figures 1-7 A snap-fit ​​high-precision countersinking tool includes a tool holder body and a tool accessory 5 mounted on the tool holder body. The tool holder body includes a housing 1. One end of the housing 1 has a groove, and a tool slide 2 is slidably connected in the groove. The end of the housing 1 away from the tool slide 2 is connected to a drive shaft. The bottom end of the groove is rotatably connected to a half-tooth gear 11. One end of the tool slide 2 has a tooth groove that matches the half-tooth gear 11. A transmission assembly is connected between the drive shaft and the half-tooth gear 11. The transmission assembly includes a drive shaft 12 rotatably connected in the housing 1. The two ends of the drive shaft 12 are respectively connected to a tool holder rod and a drive gear. A gear, a worm, and a worm wheel shaft for transmission are connected between the drive gear and the half-tooth gear 11, and the worm wheel shaft meshes with the half-tooth gear 11.

[0037] When the drive shaft 12 rotates, it drives the gear, worm, and worm wheel shaft to work. The gear and worm transmit the power to the half-tooth gear 11 and drive the tool slide 2 to make a cutting motion in the radial direction. When the tool slide 2 reaches the stroke, the half-tooth gear 11 rotates to the missing tooth part. At this time, the tool slide 2 is pulled to the starting position by the tension spring.

[0038] The tool slide 2 includes a mounting plate 21. One end of the mounting plate 21 is connected to a slider body 22 that slides relative to the slide groove. Gear grooves are formed on the slider body 22. The other end of the mounting plate 21 is provided with a strip groove for mounting the tool accessory 5 and multiple pairs of evenly distributed fixing grooves. The tool accessory 5 includes a base plate 51. A damping slider that matches the strip groove is fixedly connected to the base plate 51. An internal threaded connector 52 is fixedly connected to the base plate 51. A fixing screw is detachably connected between the base plate 51 and the fixing groove. The tool body 53 is threadedly connected to the internal threaded connector 52.

[0039] The upper and lower ends of the slide are respectively fixedly connected to the upper limit block 3 and the lower support block 4; the lower end of the upper limit block 3 is fixedly connected to the sensing column 31. When the tool slide 2 is driven by the half-tooth gear 11 to move to the maximum displacement, it fits with the sensing column 31.

[0040] The sensing column 31 includes a movable column 311. The lower end of the upper limit block 3 is provided with a limiting groove that matches the movable column 311. The bottom end of the limiting groove is connected to a sensing unit 312. A compression spring is connected between the sensing unit 312 and the movable column 311. A pressure sensor is integrated on the sensing unit 312. The sensing unit 312 is electrically connected to the feed control unit 7. When the tool slide 2 rises to the maximum displacement, the movable column 311 is pressed, which in turn presses the sensing unit 312. By detecting the change in pressure value and the number of times, the sensing unit 312 can determine the change in the displacement of the tool slide 2 and the number of times the tool is ejected. By judging the change in the displacement of the tool slide 2, the accuracy of the rise adjustment of the feed control unit 7 is verified. By recording the number of times the tool is ejected, it is identified whether the tool has exceeded the optimal number of working times. If it has exceeded the optimal number of working times, the external calibration equipment is notified to detect the wear of the tool.

[0041] The pressure value detected by the sensing unit 312 at each contact is fed back to the feed control unit 7 in real time. The control system compares the actual detected pressure value with the theoretical expected value, which corresponds to the pressure value at the theoretical highest point of the tool slide 2. This comparison determines whether the actual displacement of the tool slide 2 matches the commanded displacement, thus verifying the accuracy of the feed control unit 7's adjustment. The compression amount of the compression spring is calculated based on the pressure value detected by the pressure sensor and the spring constant, thereby obtaining the calculated displacement. If the displacement calculated based on the pressure value deviates continuously or significantly from the commanded value, for example, due to changes in system rigidity or accumulated errors, a system alarm or automatic compensation process can be triggered.

[0042] Two mounting holes are provided on the lower support block 4. A fixing unit 41 and a support unit 42 are respectively connected in the two mounting holes. A tension spring is connected between the fixing unit 41 and the tool slide 2. After the tool slide 2 is reset by the tension spring, it fits against the support unit 42.

[0043] The mounting hole includes a lower half with internal threads and a smooth upper half, the inner diameter of the lower half being larger than the inner diameter of the upper half; the fixing unit 41 is threadedly connected to the lower half of the mounting hole, the support unit 42 is slidably connected to the upper half of the mounting hole, and a support cover 421 threadedly connected to the lower half of the mounting hole is provided on the lower side of the support unit 42, the support cover 421 having a round hole in the middle.

[0044] The lower end of the housing 1 is fixedly connected to an anti-rotation attachment 6, which is used to limit the housing 1. The top end of the anti-rotation attachment 6 is connected to a feed control unit 7 that matches the support unit 42. The feed control unit 7 is used to adjust the position of the support unit 42. By adjusting the position of the support unit 42, the blade exit distance is adjusted, thereby compensating for blade wear.

[0045] The feed control unit 7 includes a cylinder 71. The telescopic end of the cylinder 71 is connected to a plug that matches the round hole. After the telescopic end of the cylinder 71 is inserted into the support cover 421, it can lift the support unit 42, thereby raising the support unit 42 and adjusting the position of the tool slide 2 after reset. By adjusting the position of the tool slide 2 after reset, when the tool slide 2 is subsequently driven to rise by the half-tooth gear 11, the rising distance increases, and the increase is consistent with the rising distance of the support unit 42.

[0046] The tool slide 2 has a tool extension stroke of 31.4 mm, which enables automatic radial tool extension to prevent damage to the tool body due to misoperation;

[0047] In use, the tool holder body is connected and fixed to an external drive device, such as a machine tool spindle, via the tool holder rod end of the drive shaft 12; the drive device is started to drive the drive shaft 12 to rotate, thereby driving the drive gear on it to rotate.

[0048] The driving gear drives the gear to rotate through meshing, which in turn drives the worm to rotate. The worm then drives the worm wheel shaft, which meshes with it, to rotate. The worm wheel shaft meshes with the half-tooth gear 11 at the bottom of the slide, thereby driving the half-tooth gear 11 to rotate. The rotation of the half-tooth gear 11 is converted into the linear lifting and lowering motion of the tool slide 2 meshing with it within the slide.

[0049] When the half-tooth gear 11 drives the tool slide 2 to move upward to its maximum displacement, the upper end face of the tool slide 2 is in close contact with the movable column 311 of the sensing column 31 at the lower end of the upper limit block 3. The movable column 311 moves downward under pressure, compressing the compression spring below it, and finally causing the sensing unit 312 to be subjected to pressure. The pressure sensor built into the sensing unit 312 detects that the pressure value has reached a preset threshold, indicating that the tool slide 2 has accurately reached the machining position, i.e., the highest point;

[0050] Each time the tool slide 2 rises to its highest point and contacts the sensing column 31, the sensing unit 312 not only detects the pressure signal to confirm its position but also records this pressure event as one tool ejection. The control system can count the actual number of tool ejections by accumulating the recorded pressure events. When the counted number of tool ejections reaches the preset optimal tool working number threshold, the system sends a signal to notify external calibration equipment (e.g., a tool setter or wear detection device) to accurately detect and evaluate the wear of the tool body 53.

[0051] When the cutting tool reaches its stroke, the missing tooth portion of the half-tooth gear matches the tooth groove on the tool slide 2, at which point the tool slide 2 is pulled to the starting position by the tension spring;

[0052] When the actual cutting edge height decreases due to tool wear, wear compensation is required to ensure that the machining depth remains unchanged (the tool wear amount is detected by existing tool detection equipment, which will not be detailed in this solution). At this time, the cylinder 71 of the feed control unit 7 is activated, its telescopic end extends, and the top insert is precisely inserted into the round hole in the middle of the support cover 421, thus lifting the support unit 42 upward. Since the support unit 42 is slidably connected to the upper half of the mounting hole, and its lower side is restricted by the support cover 421, the support unit 42 is lifted and stabilized in a higher position.

[0053] When the tool slide 2 is reset under the action of the tension spring, its lower end face will be attached to the raised support unit 42. This means that the reset position of the tool slide 2 has been raised by a height, that is, the lowest point has been raised. This height is equal to the distance that the support unit 42 has been lifted.

[0054] Therefore, in subsequent machining cycles, when the half-gear 11 drives the tool slide 2 to rise from the reset position after being raised to the highest point in contact with the sensing column 31, the total displacement of its rise is increased by a corresponding compensation amount, thereby compensating for the wear of the tool and ensuring that the effective cutting part of the tool body 53 can still reach the preset working height, thus ensuring the consistency of the machining depth.

[0055] This solution improves machining accuracy and efficiency by using a radially automatic tool slide 2 and an adjustable lower support block 4 for resetting the tool slide 2. It ensures that the tool body 53 accurately reaches the preset working height each time it is deployed, avoiding machining depth deviation caused by tool wear. At the same time, the pressure detection of the sensing unit 312 and the closed-loop feedback mechanism of the feed control unit 7 realize real-time verification and automatic compensation of tool displacement, effectively reducing manual intervention and downtime.

[0056] Second implementation method:

[0057] The difference between this implementation method and the first implementation method is that:

[0058] It also includes a feed compensation system, which includes a terminal processor electrically connected to the feed control unit 7. The terminal processor is connected to a data acquisition module, a data processing module, a control module, and a data storage module.

[0059] The data acquisition module is used to collect pressure data collected at the sensing column 31 and status data of the feed control unit 7. The pressure data collected at the sensing column 31 includes real-time pressure value, single contact signal and cumulative number of contacts. The status data of the feed control unit 7 includes: position feedback of the extension end of the cylinder 71 and the upward displacement of the support unit 42.

[0060] The data acquisition module is also connected to an external calibration device. The external calibration device adopts existing technology and is set up by a person skilled in the art by selecting a suitable device in the existing technology for testing the tool. The external calibration device (e.g., tool setter and wear detection device) is used by the data acquisition module to collect the actual wear data of the tool body 53 fed back by the external calibration device.

[0061] The data processing module is used to analyze and calculate the data collected by the data acquisition module to determine whether the number of cuts and the adjustment accuracy meet the requirements.

[0062] In specific work:

[0063] Displacement calculation and accuracy verification: Based on the pressure value (F) detected by the pressure sensor and the elastic coefficient (k) of the compression spring, the compression amount (x) of the compression spring is calculated by Hooke's law (F=kx), which is the actual displacement of the tool slide 2; the actual displacement is compared with the commanded displacement of the feed control unit 7 to determine whether the adjustment accuracy meets the requirements.

[0064] Cutting count statistics and threshold judgment: The number of times the sensing unit contacts the signal is accumulated to obtain the actual number of cuttings. This number is compared with the preset "optimal working count threshold". If the threshold is exceeded, the external verification device is triggered to intervene.

[0065] Wear compensation calculation: Receive tool wear data (denoted as Δd) from external calibration equipment, calculate the required compensation displacement (i.e., the distance that the support unit 42 needs to rise, Δd compensation = Δd wear, since the rising distance of the support unit is equal to the increase in the subsequent rising distance of the tool slide, the wear can be directly compensated).

[0066] Control module: Based on the output of the data processing module, it sends an execution command to the feed control unit 7 to adjust the position of the support unit 42 to perform tool exit distance compensation;

[0067] The specific compensation control operation is as follows: When tool exit distance compensation is required, the cylinder 71 extension end is controlled to extend by the corresponding length according to the calculated compensation displacement (Δd compensation), and the support unit 42 is lifted to the target position to ensure that the position of the tool slide 2 is raised by Δd compensation after reset. The total displacement is increased by Δd compensation during subsequent rise to compensate for tool wear.

[0068] The system receives feedback data from the feed control unit 7 and the sensing column 31 in real time (the actual lifting displacement of the support unit 42), compares it with the target compensation amount, and if there is a deviation, adjusts the cylinder action a second time until the compensation is in place.

[0069] Data storage module: Used to store basic parameters, real-time data and historical records required for system operation. Specific data includes: Basic parameter library: theoretical expected pressure value (corresponding to the pressure value at the theoretical highest point of tool slide 2), compression spring elastic coefficient, tool optimal working number threshold, tool initial parameters (such as cutting edge height).

[0070] Real-time / historical database: records of pressure values ​​for each cut, actual displacement data, cumulative number of cuts, wear detection reports (wear amount, detection time), and wear compensation records (compensation time, compensation displacement, cylinder action parameters).

[0071] System logs contain accuracy verification results and abnormal alarm records (such as adjustment accuracy deviations, failure to detect exceeding the limit, etc.), used for data traceability, system optimization, and tool life analysis.

[0072] This implementation method enables automated and precise control of the feed process and intelligent compensation for tool wear, significantly improving tool machining accuracy and service life. Specifically, through multi-dimensional data acquisition by the data acquisition module and real-time analysis by the data processing module, the system can accurately determine the working status and wear level of the tool. The control module automatically adjusts the position of the support unit based on the analysis results to achieve dynamic compensation of the tool exit distance, ensuring stable accuracy for each machining operation. At the same time, the data storage module completely records the data of the entire system operation process, providing detailed data support for subsequent tool maintenance, performance optimization, and troubleshooting.

[0073] The above description is merely a preferred embodiment of the present invention; it encompasses all the protection scope of the present invention. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solutions and improved concepts of the present invention, should be covered within the protection scope of the present invention.

Claims

1. A snap-fit ​​high-precision countersinking tool, comprising a tool holder body and a tool accessory (5) mounted on the tool holder body, wherein the tool holder body comprises a housing (1), one end of the housing (1) is provided with a groove, and a tool slide (2) is slidably connected in the groove, a drive shaft is connected to the end of the housing (1) away from the tool slide (2), a half-tooth gear (11) is rotatably connected to the bottom end of the groove, one end of the tool slide (2) is provided with a tooth groove matching the half-tooth gear (11), and a transmission assembly is connected between the drive shaft and the half-tooth gear (11), characterized in that: The tool slide (2) includes a mounting plate (21), one end of which is connected to a slider body (22) that slides relative to the slide groove, and the other end of the mounting plate (21) is provided with a strip groove for mounting the tool accessory (5) and multiple pairs of evenly distributed fixing grooves. The upper and lower ends of the slide are respectively fixedly connected to an upper limit block (3) and a lower support block (4); the lower end of the upper limit block (3) is fixedly connected to a sensing column (31), and the tool slide (2) is driven by the half gear (11) to move to the maximum displacement and fits with the sensing column (31); the lower support block (4) has two mounting holes, and the two mounting holes are respectively connected to a fixing unit (41) and a support unit (42). A tension spring is connected between the fixing unit (41) and the tool slide (2), and the tool slide (2) fits with the support unit (42) after being reset by the tension spring; The lower end of the housing (1) is fixedly connected to an anti-rotation attachment (6), and the top end of the anti-rotation attachment (6) is connected to an infeed control unit (7) that matches the support unit (42). The infeed control unit (7) is used to adjust the position of the support unit (42). The sensing column (31) includes a movable column (311). The lower end of the upper limit block (3) is provided with a limiting groove that matches the movable column (311). The bottom end of the limiting groove is connected to a sensing unit (312). A compression spring is connected between the sensing unit (312) and the movable column (311). A pressure sensor is integrated on the sensing unit (312). The sensing unit (312) is electrically connected to the feed control unit (7).

2. The snap-fit ​​high-precision countersinking tool according to claim 1, characterized in that: The transmission assembly includes a transmission shaft (12) rotatably connected within the housing (1). The two ends of the transmission shaft (12) are respectively connected to a tool holder and a drive gear. The drive gear and the half gear (11) are connected by a gear, a worm and a worm wheel shaft for transmission, and the worm wheel shaft meshes with the half gear (11).

3. The snap-fit ​​high-precision countersinking tool according to claim 1, characterized in that: The tool accessory (5) includes a base plate (51), on which a damping slider matching the strip groove is fixedly connected, and an internal threaded connector (52) is fixedly connected, and a fixing screw is detachably connected between the base plate (51) and the fixing groove, and a tool body (53) is threadedly connected to the internal threaded connector (52).

4. A snap-fit ​​high-precision countersinking tool according to claim 1, characterized in that: The mounting hole includes a lower half with internal threads and a smooth upper half, wherein the inner diameter of the lower half is larger than the inner diameter of the upper half.

5. A snap-fit ​​high-precision countersinking tool according to claim 4, characterized in that: The fixing unit (41) is threaded to the lower half of the mounting hole, the support unit (42) is slidably connected to the upper half of the mounting hole, and the support unit (42) is provided with a support cover (421) threaded to the lower half of the mounting hole on the lower side, and a round hole is provided in the middle of the support cover (421).

6. A snap-fit ​​high-precision countersinking tool according to claim 5, characterized in that: The feed control unit (7) includes a cylinder (71), and the telescopic end of the cylinder (71) is connected to a plug that matches the round hole.

7. A snap-fit ​​high-precision countersinking tool according to claim 6, characterized in that: It also includes a feed compensation system, which includes a terminal processor electrically connected to the feed control unit (7), and the terminal processor is connected to a data acquisition module, a data processing module, a control module and a data storage module; The data acquisition module is used to acquire pressure data collected at the sensing column (31) and status data of the feed control unit (7); The data processing module is used to analyze and calculate the data collected by the data acquisition module to determine whether the number of cuts and the adjustment accuracy meet the requirements. The control module sends an execution command to the feed control unit (7) based on the output of the data processing module to adjust the position of the support unit (42) for tool exit distance compensation. The data storage module is used to store the basic parameters, real-time data and historical records required for system operation.

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