A drill target machine main shaft automatic tool changing system and method

Abstract

This invention relates to an automatic tool changing system and method for a drilling machine spindle, belonging to the field of PCB automatic drilling technology. The system includes a positioning platform assembly (100), a spindle assembly (200), a tool head assembly (300), and a tool measuring device assembly (400). The positioning platform assembly (100) is located below the machine frame table and is used to control the horizontal position of the spindle (207). The spindle assembly (200) is located above the positioning platform assembly (100) and is used for drilling operations on PCBs. The tool head assembly (300) is located in front of the positioning platform assembly (100) and can hold ten tools (305) for automatically changing different tools for the spindle. The tool measuring device assembly (400) is located behind the positioning platform assembly (100) and is used to detect the length and diameter of the tools (305). This invention achieves fully automatic tool changing through the tool head assembly (300) and the tool measuring device assembly (400), avoiding errors from manual tool changing and equipment downtime. The tool changing time is shortened to approximately 15 seconds, significantly improving equipment uptime. Meanwhile, the system supports automatic switching between multiple tools to meet the needs of PCB multi-hole machining, and monitors tool wear in real time through a tool measuring unit (400) to avoid batch scrapping due to tool damage. This invention also provides an automatic tool changing method, including tool replacement, tool length and diameter detection, further improving tool changing efficiency and machining accuracy.

Description

Technical Field

[0001] This invention relates to the field of PCB automatic drilling technology, and in particular to an automatic tool changing system and method for a drilling machine spindle. Background Technology

[0002] PCB drilling machines typically employ a structure where the spindle is mounted below the machine table, and a positioning CCD camera is mounted above the machine table. The CCD locates the target hole and guides the spindle for drilling. The main structure includes the machine body, positioning platform (X and Y axes), spindle structure (Z and main spindle), transport robot (RX and RY axes), and CCD camera structure. The RX and RY axes move the PCB across the table, moving the PCB target below the CCD camera. The CCD camera then positions the PCB and guides the X and Y axes to compensate for any deviations. The Z axis then drives the spindle to complete one drilling cycle. The RX and RY axes then move the PCB to the next drilling position, repeating the cycle until all target drilling operations are completed.

[0003] The spindle structure of the PCB drilling machine is located below the machine table and is assembled with the X, Y, and Z axes. The structure is compact and space is limited. Currently, the tools on the spindle are changed manually. Each manual tool change requires the machine to stop for about 1 to 2 minutes on average, which affects the machine's uptime. Moreover, manual operation is more prone to uncertainties, which may result in the wrong tool being replaced, thus affecting the machine's production.

[0004] Currently, due to the manual tool changing method, each machine can only be equipped with one type of tool, which cannot meet the needs of processes with different hole diameters on PCB boards, thus limiting the process range of the equipment. Moreover, tool wear and damage during processing cannot be detected in time, and damaged tools can damage the PCB, causing mass production to be scrapped. Therefore, there is an urgent need for a system and method that can automatically change tools and monitor them. Summary of the Invention

[0005] This invention provides an automatic tool changing system and method for a drilling machine spindle, aiming to solve the technical problems of existing drilling machines where manual tool changing is prone to errors, affecting production efficiency, and the single-tool design cannot meet the needs of PCB multi-diameter machining and tool wear monitoring.

[0006] To address the aforementioned problems, the present invention employs the following technical solution: an automatic tool changing system for a drilling machine spindle, comprising a positioning platform assembly, a spindle assembly, a tool head assembly, and a tool measuring instrument assembly; the positioning platform is located below the machine frame table and has electrically controlled drives in the X and Y directions for controlling the horizontal position of the spindle; the spindle assembly is located above the positioning platform and has an electrically controlled drive in the Z direction and a spindle for drilling operations to process PCBs; the tool head assembly is located in front of the positioning platform and has space for loading ten tools for supplying different tools to the spindle; the tool measuring instrument assembly is located behind the positioning platform and is used to detect the diameter and length of the tools carried by the spindle.

[0007] The technical solution adopted in this embodiment of the invention further includes: the positioning platform assembly includes a platform mounting plate, a vertical plate, an X-axis base plate, an X-axis guide rail assembly, an X-axis motor, an X-axis lead screw assembly, a Y-axis base plate, a Y-axis guide rail assembly, a Y-axis motor, a Y-axis lead screw assembly, and a Y-axis sliding plate. The platform mounting plate is disposed on the machine table surface, the vertical plate is disposed below the table mounting plate, the X-axis base plate is disposed below the vertical plate, the X-axis guide rail assembly is disposed at both ends of the X-axis base plate in the X-axis direction, and the X-axis lead screw assembly is disposed in the middle of the X-axis base plate in the X-axis direction. The X-axis motor is connected to the X-axis lead screw assembly and can drive the positioning platform to move in the X-axis direction. The Y-axis base plate is located above the X-axis guide rail assembly. The Y-axis guide rail assembly is located at both ends of the Y-axis base plate in the Y-axis direction. The Y-axis lead screw assembly is located in the middle of the Y-axis base plate in the Y-axis direction. The Y-axis motor is connected to the Y-axis lead screw assembly and can drive the positioning platform to move in the Y-axis direction. The Y-axis slide plate is located above the Y-axis guide rail assembly. Driven by the X-axis motor and the Y-axis motor, the Y-axis slide plate can move in both the X-axis and Y-axis directions.

[0008] The technical solution adopted in this embodiment of the invention further includes: the spindle assembly includes a Z-axis base plate, a Z-axis guide rail assembly, a Z-axis motor, a Z-axis lead screw assembly, a Z-axis slide plate, a spindle seat, and a spindle. The Z-axis base plate is disposed above the positioning platform assembly, the Z-axis guide rail is disposed at both ends of the Z-axis base plate, the Z-axis lead screw assembly is disposed in the middle of the Z-axis base plate, the Z-axis motor is connected to the Z-axis lead screw assembly, the Z-axis slide plate is disposed above the Z-axis guide rail assembly, the Z-axis slide plate is provided with the spindle seat, and the spindle is disposed in the spindle seat. Under the drive of the Z-axis motor, the spindle can move in a direction perpendicular to the horizontal plane.

[0009] The technical solution adopted in this embodiment of the invention further includes: the cutter head assembly includes a cutter head mounting plate, a rotating platform, a cutter head, a tool holder, a cutting tool, an R-axis motor, and a cutting tool sensor. The cutter head mounting plate is located in front of the positioning platform assembly, the rotating platform is located in the middle of the cutter head mounting, the cutter head is located above the rotating platform, the cutter head has ten tool holders, the cutting tool is located in the tool holder, the tool shank faces downward and can be pulled out downward, the R-axis motor is connected to the rotating platform and is used to drive the rotating platform to rotate, the cutting tool sensor is located on one side of the cutter head mounting plate, and can detect whether there is a cutting tool in each tool holder when the cutter head rotates. In the following description, the tool holder with a cutting tool is called the tool holder, and the tool holder without a cutting tool is called the empty tool holder.

[0010] The technical solution adopted in this embodiment of the invention further includes: the tool measuring instrument assembly includes a mounting plate, a guide rail assembly, a cylinder, and a tool measuring instrument; the mounting plate is fixed behind the positioning platform assembly; the guide rail assembly is disposed on the mounting plate; the tool measuring instrument is connected to the guide rail assembly via a slider and can move along the guide rail under the drive of the cylinder; when the cylinder extends, the tool measuring instrument is located at the detection position directly above the spindle, and when it retracts, it avoids the spindle machining area; the tool measuring instrument is equipped with a photoelectric sensor, and the tool measuring principle is to detect whether there is a tool in the tool measuring instrument through the signal of the photoelectric sensor.

[0011] The technical solution adopted in this embodiment of the invention also includes: the cutter head is provided with a notch, and when the cutter head rotates, each tool holder and the notch can be placed above the spindle. When the tool holder is placed above the spindle, tool changing can be performed. When the notch is placed above the spindle, it does not affect the spindle's rise and drilling operations.

[0012] The technical solution adopted in this embodiment of the invention also includes: the tool measuring instrument can be placed above the spindle when it is extended by the cylinder to detect the tool length and diameter, and the retraction of the cylinder does not affect the spindle rising and drilling operation.

[0013] Another technical solution adopted in this embodiment of the invention is: an automatic tool changing method for a target drilling machine spindle, comprising the following steps: Step a: Begin the tool change operation. The Z-axis drive spindle is lowered to the bottom standby position to avoid interference with the tool turret or tool measuring instrument.

[0014] Step b: The R-axis motor drives the empty tool holder for retracting the tool to the tool sensor position to further confirm whether there is a tool in the empty tool holder. If the tool sensor detects a tool, the tool changing operation stops and the equipment alarms and stops. If no tool is detected, proceed to the next step.

[0015] Step c: The R-axis motor drives the empty tool holder to be placed above the spindle. The spindle moves upward to the tool change position and releases the clamp. The tool is fixed in the empty tool holder, and the spindle returns to the bottom standby position.

[0016] Step d: The R-axis motor drives the empty tool holder to the tool sensor position to further confirm whether there is a tool in the empty tool holder. If the tool sensor detects that there is no tool, the tool changing operation stops and the equipment alarms and stops. If a tool is detected, the tool retraction operation is completed.

[0017] Step e: The R-axis motor drives the tool holder for loading the tool to the tool sensor position to further confirm whether there is a tool in the tool holder. If the tool sensor detects no tool, the tool changing operation stops and the equipment alarms and stops. If a tool is detected, proceed to the next step.

[0018] Step f: The R-axis motor drives the tool holder to be placed above the spindle. The spindle moves upward to the tool change position and clamps the fixture. The tool is fixed to the spindle. The spindle returns to the bottom standby position.

[0019] Step g: The R-axis motor drives the tool holder to the tool sensor position to further confirm whether there is a tool in the tool holder. If the tool sensor detects a tool, the tool changing operation stops and the equipment alarms and stops. If no tool is detected, the tool loading operation is completed. The R-axis motor drives the tool disc notch to be positioned above the spindle.

[0020] Step h: The cylinder drives the tool measuring instrument to extend and position it above the spindle. The spindle starts drilling and rises. The tool tip position is detected by the sensor of the tool measuring instrument, and the tool length parameter is determined according to the Z-axis position. If there is any abnormality, the tool changing operation is stopped and the equipment alarms and stops.

[0021] Step i: The spindle calculates the starting point for measuring the tool diameter based on the tool length parameter. The spindle moves slowly forward from the starting point of the tool diameter measurement. The tool diameter is calculated by multiplying the occlusion time of the tool measuring instrument sensor by the spindle moving speed. After confirming that the diameter is correct, the tool length and tool diameter detection operation is completed. If there is any abnormality, the tool change operation is stopped and the equipment alarms and stops.

[0022] Step j: The cylinder drives the tool measuring instrument to retract, and the spindle rises to the drilling standby position to complete the tool change operation; according to the test, the automatic tool change takes about 15 seconds.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows: The automatic tool changing system and method for the spindle of the drilling machine of the present invention upgrades the tool changing operation that originally required manual operation to fully automatic tool changing through the front-mounted tool magazine and the rear-mounted tool measuring instrument, avoiding the errors that are easy to occur in the manual tool changing process. The downtime of manual tool changing is reduced from 2 minutes to 15 seconds for automatic tool changing, improving the uptime of the equipment. Furthermore, automatic tool changing can be done without stopping the machine. Different hole diameters on the same PCB can be completed simultaneously, expanding the process range of the equipment. The tool length and diameter can be detected each time the tool is changed, and abnormal tools can be detected in time, avoiding batch scrapping. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the automatic tool changer system for the spindle of a target drilling machine according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the positioning platform component in the automatic tool changer system for the spindle of a target drilling machine according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the spindle assembly in the automatic tool changer system for the target drilling machine according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the cutter head assembly in the automatic tool changer system of the target drilling machine spindle according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the tool measuring instrument component in the automatic tool changer system for the spindle of a target drilling machine according to an embodiment of the present invention; Figure 6 This is a flowchart of the automatic tool changing method for the spindle of a drilling machine according to an embodiment of the present invention.

[0025] Reference numerals: 100-Positioning platform assembly, 101-Platform mounting plate, 102-Upright plate, 103-X-axis base plate, 104-X-axis guide rail assembly, 105-X-axis motor, 106-X-axis lead screw assembly, 107-Y-axis base plate, 108-Y-axis guide rail assembly, 109-Y-axis motor, 110-Y-axis lead screw assembly, 111-Y-axis slide plate, 200-Spindle assembly, 201-Z-axis base plate, 202-Z-axis guide rail assembly, 2 03-Z-axis motor, 204-Z-axis lead screw assembly, 205-Z-axis slide plate, 206-spindle seat, 207-spindle, 300-tool head assembly, 301-tool head mounting plate, 302-rotary platform, 303-tool head, 304-tool holder, 305-tool, 306-R-axis motor, 307-tool sensor, 400-tool measuring instrument assembly, 401-mounting plate, 402-guide rail assembly, 403-cylinder, 404-tool measuring instrument. Detailed Implementation

[0026] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0028] Please refer to Figures 1-5An automatic tool changing system for a drilling machine spindle includes a positioning platform assembly 100, a spindle assembly 200, a tool head assembly 300, and a tool measuring device assembly 400. The positioning platform assembly 100 is located below the machine frame table (not shown) and has electrically controlled drives in the X and Y directions to control the horizontal position of the spindle. The spindle assembly 200 is located above the positioning platform assembly 100 and has an electrically controlled drive in the Z direction and a spindle for drilling operations to process PCBs. The tool head assembly 300 is located in front of the positioning platform assembly 100 and has space for loading ten tools to supply different tools to the spindle. The tool measuring device assembly 400 is located behind the positioning platform assembly 100 and is used to detect the diameter and length of the tools carried by the spindle.

[0029] The technical solution adopted in this embodiment of the invention further includes: the positioning platform assembly 100 includes a platform mounting plate 101, a vertical plate 102, an X-axis base plate 103, an X-axis guide rail assembly 104, an X-axis motor 105, an X-axis lead screw assembly 106, a Y-axis base plate 107, a Y-axis guide rail assembly 108, a Y-axis motor 109, a Y-axis lead screw assembly 110, and a Y-axis slide plate 111. The platform mounting plate 101 is disposed on the machine table surface, the vertical plate 102 is disposed below the table mounting plate 101, the X-axis base plate 103 is disposed below the vertical plate 102, the X-axis guide rail assembly 104 is disposed at both ends of the X-axis base plate 103 in the X-axis direction, and the X-axis lead screw assembly 106 is disposed at the X-axis end of the X-axis base plate 103. In the middle of the Y-axis, the X-axis motor 105 is connected to the X-axis lead screw assembly 106, which can drive the positioning platform assembly 100 to move in the X-axis direction. The Y-axis base plate 107 is located above the X-axis guide rail assembly 104. The Y-axis guide rail assembly 108 is located at both ends of the Y-axis base plate 107 in the Y-axis direction. The Y-axis lead screw assembly 110 is located in the middle of the Y-axis base plate 107 in the Y-axis direction. The Y-axis motor 109 is connected to the Y-axis lead screw assembly 110, which can drive the positioning platform assembly 100 to move in the Y-axis direction. The Y-axis slide plate 111 is located above the Y-axis guide rail assembly 108. The Y-axis slide plate 111 can move in both the X-axis and Y-axis directions under the drive of the X-axis motor 105 and the Y-axis motor 109.

[0030] In other embodiments of the present invention, the spindle assembly 200 includes a Z-axis base plate 201, a Z-axis guide rail assembly 202, a Z-axis motor 203, a Z-axis lead screw assembly 204, a Z-axis slide plate 205, a spindle seat 206, and a spindle 207. The Z-axis base plate 201 is disposed above the positioning platform assembly 100. The Z-axis guide rail assembly 202 is disposed at both ends of the Z-axis base plate 201. The Z-axis lead screw assembly 204 is disposed in the middle of the Z-axis base plate 201. The Z-axis motor 203 is connected to the Z-axis lead screw assembly 204. The Z-axis slide plate 205 is disposed above the Z-axis guide rail assembly 202. The Z-axis slide plate 205 has the spindle seat 206. The spindle 207 is disposed in the spindle seat 206. Under the drive of the Z-axis motor 203, the spindle 207 can move in a direction perpendicular to the horizontal plane.

[0031] In other embodiments of the present invention, the cutter head assembly 300 includes a cutter head mounting plate 301, a rotating platform 302, a cutter head 303, tool holders 304, cutting tools 305, an R-axis motor 306, and a cutting tool sensor 307. The cutter head mounting plate 301 is located in front of the positioning platform assembly 100, the rotating platform 302 is located in the middle of the cutter head mounting plate 301, the cutter head 303 is located above the rotating platform 302, the cutter head 303 has ten tool holders 304, and the cutting tools 305 are located in the tool holders 304 with their handles facing downwards and can be pulled out downwards. The R-axis motor 306 is connected to the rotating platform 302 and is used to drive the rotating platform 302 to rotate. The cutting tool sensor 307 is located on one side of the cutter head mounting plate 301 and can detect whether there is a cutting tool 305 in each tool holder 304 when the cutter head 303 rotates.

[0032] In other embodiments of the present invention, the tool measuring device assembly 400 includes a mounting plate 401, a guide rail assembly 402, a cylinder 403, and a tool measuring device 404. The mounting plate 401 is fixed to the rear of the positioning platform assembly 100. The guide rail assembly 402 is disposed on the mounting plate 401. The tool measuring device 404 is connected to the guide rail assembly 402 via a slider and can move along the guide rail assembly 402 under the drive of the cylinder 403. When the cylinder 403 extends, the tool measuring device 404 is located at the detection position directly above the spindle 207, and when it retracts, it avoids the machining area of ​​the spindle 207.

[0033] In other embodiments of the present invention, the cutter head 303 is provided with a notch. When the cutter head 303 rotates, each tool holder 304 and the notch can be placed above the spindle 207. When the tool holder 304 is placed above the spindle 207, tool changing can be performed. When the notch is placed above the spindle 207, it does not affect the rising of the spindle 207 and the drilling operation.

[0034] In other embodiments of the present invention, the tool measuring instrument 404 can be placed above the spindle 207 when it is extended by the cylinder 403 to detect the length and diameter of the tool 305. When the cylinder 403 is retracted, it does not affect the raising of the spindle 207 and the drilling operation.

[0035] Please refer to this. Figure 6 This is a flowchart of an automatic tool changing method for a drilling machine spindle according to an embodiment of the present invention; the automatic tool changing method for a drilling machine spindle according to an embodiment of the present invention includes the following steps: Step S100: Start the tool change operation. The Z-axis drive spindle is lowered to the bottom standby position to avoid interference with the tool turret or tool measuring instrument.

[0036] Step S200: The R-axis motor drives the empty tool holder for retracting the tool to the tool sensor position to further confirm whether there is a tool in the empty tool holder. If no tool is detected, proceed to the next step.

[0037] Step S300: The R-axis motor drives the empty tool holder to be placed above the spindle. The spindle moves upward to the tool change position and releases the clamp. The tool is fixed in the empty tool holder, and the spindle returns to the bottom standby position.

[0038] Step S400: The R-axis motor drives the empty tool holder to the tool sensor position to further confirm whether there is a tool in the empty tool holder. If a tool is detected, the tool retraction operation is completed and the next step is performed.

[0039] Step S500: The R-axis motor drives the tool holder for loading the tool to the tool sensor position to further confirm whether there is a tool in the tool holder. If a tool is detected, proceed to the next step.

[0040] Step S600: The R-axis motor drives the tool holder to be placed above the spindle, the spindle moves upward to the tool change position and clamps the fixture, the tool is fixed to the spindle, and the spindle returns to the bottom standby position;

[0041] Step S700: The R-axis motor drives the tool holder to the tool sensor position to further confirm whether there is a tool in the tool holder. If no tool is detected, the tool loading operation is completed; the R-axis motor drives the tool disc notch to be positioned above the spindle.

[0042] Step S800: The cylinder drives the tool measuring instrument to extend and be placed above the spindle. The spindle starts drilling and rises. The position of the tool tip is detected by the sensor of the tool measuring instrument and the tool length parameter is determined according to the Z-axis position.

[0043] Step S900: The spindle calculates the starting point for measuring the tool diameter based on the tool length parameter, and moves forward slowly to the starting point of the tool diameter measurement. The tool diameter is calculated by multiplying the occlusion time of the measuring instrument sensor by the spindle moving speed. After confirming that the diameter is correct, the tool length and tool diameter detection operation is completed.

[0044] Step S1000: The cylinder drives the tool measuring instrument to retract, and the spindle rises to the drilling standby position to complete the tool change operation.

[0045] The automatic tool changing system and method for the spindle of the drilling machine of this invention upgrades the tool changing operation, which originally required manual operation, to fully automatic tool changing through a front-mounted tool magazine and a rear-mounted tool measuring instrument. This avoids the errors that are prone to occur during manual tool changing, reduces the downtime of manual tool changing from 2 minutes to 15 seconds for automatic tool changing, improves the equipment's uptime, and allows for tool changing without downtime. Different hole diameters on the same PCB can be changed simultaneously, expanding the equipment's process range. Each tool change can detect the tool length and diameter, and abnormal tools can be detected in time, avoiding batch scrapping.

[0046] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. An automatic tool changing system for a target drilling machine spindle, characterized in that: It includes a positioning platform assembly (100), a spindle assembly (200), a cutter head assembly (300), and a tool measuring device assembly (400); the positioning platform assembly (100) is located below the machine frame table; the spindle assembly (200) is located above the positioning platform assembly (100); the cutter head assembly (300) is located in front of the positioning platform assembly (100); and the tool measuring device assembly (400) is located behind the positioning platform assembly (100).

2. The automatic tool changing system for the spindle of a target drilling machine according to claim 1, characterized in that: The positioning platform assembly (100) includes a platform mounting plate (101), a vertical plate (102), an X-axis base plate (103), an X-axis guide rail assembly (104), an X-axis motor (105), an X-axis lead screw assembly (106), a Y-axis base plate (107), a Y-axis guide rail assembly (108), a Y-axis motor (109), a Y-axis lead screw assembly (110), and a Y-axis slide plate (111). The platform mounting plate (101) is located on the machine table surface, the vertical plate (102) is located below the table mounting plate (101), the X-axis base plate (103) is located below the vertical plate (102), and the X-axis guide rail assembly (104) is located on the X-axis base plate. (103) is located at both ends of the X-axis direction, the X-axis lead screw assembly (106) is located in the middle of the X-axis direction of the X-axis base plate (103), the X-axis motor (105) is connected to the X-axis lead screw assembly (106), the Y-axis base plate (107) is located above the X-axis guide rail assembly (104), the Y-axis guide rail assembly (108) is located at both ends of the Y-axis direction of the Y-axis base plate (107), the Y-axis lead screw assembly (110) is located in the middle of the Y-axis direction of the Y-axis base plate (107), the Y-axis motor (109) is connected to the Y-axis lead screw assembly (110), and the Y-axis slide plate (111) is located above the Y-axis guide rail assembly (108).

3. The automatic tool changing system for the spindle of a target drilling machine according to claim 2, characterized in that: The spindle assembly (200) includes a Z-axis base plate (201), a Z-axis guide rail assembly (202), a Z-axis motor (203), a Z-axis lead screw assembly (204), a Z-axis slide plate (205), a spindle seat (206), and a spindle (207). The Z-axis base plate (201) is located above the positioning platform assembly (100). The Z-axis guide rail assembly (202) is located at both ends of the Z-axis base plate (201). The Z-axis lead screw assembly (204) is located in the middle of the Z-axis base plate (201). The Z-axis motor (203) is connected to the Z-axis lead screw assembly (204). The Z-axis slide plate (205) is located above the Z-axis guide rail assembly (202). The Z-axis slide plate (205) has the spindle seat (206) located on it. The spindle (207) is located in the spindle seat (206).

4. The automatic tool changing system for the spindle of a target drilling machine according to claim 3, characterized in that: The cutter head assembly (300) includes a cutter head mounting plate (301), a rotary platform (302), a cutter head (303), a tool holder (304), a cutting tool (305), an R-axis motor (306), and a cutting tool sensor (307). The cutter head mounting plate (301) is located in front of the positioning platform assembly (100). The rotary platform (302) is located in the middle of the cutter head mounting plate (301). The cutter head (303) is located above the rotary platform (302). The cutter head (303) has ten tool holders (304). The cutting tool (305) is located in the tool holder (304). The R-axis motor (306) is connected to the rotary platform (302). The cutting tool sensor (307) is located on one side of the cutter head mounting plate (301).

5. The automatic tool changer for the spindle of the target drilling machine according to claim 4, characterized in that: The tool measuring device assembly (400) includes a mounting plate (401), a guide rail assembly (402), a cylinder (403), and a tool measuring device (404). The mounting plate (401) is fixed to the rear of the positioning platform assembly (100). The guide rail assembly (402) is mounted on the mounting plate (401). The tool measuring device (404) is connected to the guide rail assembly (402) via a slider and can move along the guide rail assembly (402) under the drive of the cylinder (403).

6. The automatic tool changer for the spindle of the target drilling machine according to claim 5, characterized in that: The cutter head (303) has a notch. When the cutter head (303) rotates, each cutter holder (304) and the notch can be placed above the spindle (207). When the notch is placed above the spindle (207), it does not affect the rise of the spindle (207).

7. The automatic tool changing system for the spindle of a target drilling machine according to claim 6, characterized in that: The tool measuring instrument (404) can be placed above the spindle (207) when it is extended by the cylinder (403) to detect the length and diameter of the tool (305). When the cylinder (403) is retracted, it does not affect the rise of the spindle (207).

8. An automatic tool changing method for a target drilling machine spindle, characterized in that: Includes the following steps: Step a: Begin the tool change operation. The Z-axis drive spindle is lowered to the bottom standby position to avoid interference with the tool turret or tool measuring instrument. Step b: The R-axis motor drives the empty tool holder for retracting the tool to the tool sensor position to further confirm whether there is a tool in the empty tool holder. If the tool sensor detects a tool, the tool changing operation stops and the equipment alarms and stops. If no tool is detected, proceed to the next step. Step c: The R-axis motor drives the empty tool holder to be placed above the spindle. The spindle moves upward to the tool change position and releases the clamp. The tool is fixed in the empty tool holder, and the spindle returns to the bottom standby position. Step d: The R-axis motor drives the empty tool holder to the tool sensor position to further confirm whether there is a tool in the empty tool holder. If the tool sensor detects that there is no tool, the tool changing operation stops and the equipment alarms and stops. If a tool is detected, the tool retraction operation is completed. Step e: The R-axis motor drives the tool holder for loading the tool to the tool sensor position to further confirm whether there is a tool in the tool holder. If the tool sensor detects no tool, the tool changing operation stops and the equipment alarms and stops. If a tool is detected, proceed to the next step. Step f: The R-axis motor drives the tool holder to be placed above the spindle. The spindle moves upward to the tool change position and clamps the fixture. The tool is fixed to the spindle. The spindle returns to the bottom standby position. Step g: The R-axis motor drives the tool holder to the tool sensor position to further confirm whether there is a tool in the tool holder. If the tool sensor detects a tool, the tool changing operation stops and the equipment alarms and stops. If no tool is detected, the tool loading operation is completed. The R-axis motor drives the tool disc notch to be positioned above the spindle. Step h: The cylinder drives the tool measuring instrument to extend and position it above the spindle. The spindle starts drilling and rises. The tool tip position is detected by the sensor of the tool measuring instrument, and the tool length parameter is determined according to the Z-axis position. If there is any abnormality, the tool changing operation is stopped and the equipment alarms and stops. Step i: The spindle calculates the starting point for measuring the tool diameter based on the tool length parameter. The spindle moves slowly forward from the starting point of the tool diameter measurement. The tool diameter is calculated by multiplying the occlusion time of the tool measuring instrument sensor by the spindle moving speed. After confirming that the diameter is correct, the tool length and tool diameter detection operation is completed. If there is any abnormality, the tool change operation is stopped and the equipment alarms and stops. Step j: The cylinder drives the tool measuring instrument to retract, and the spindle rises to the drilling standby position to complete the tool change operation.

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