Tool holder type cutting device of a five-axis machining center

Abstract

The application discloses a tool shank type cutting device of a five-axis machining center and belongs to the technical field of drilling machining. The tool shank type cutting device of the five-axis machining center comprises a fastening device, a tool shank and a cutting tool, the upper part of the tool shank is detachably connected with the fastening device, the lower part of the tool shank is detachably connected with the cutting tool, and the cutting tool is driven by a servo motor to cut a workpiece; a cooling device is arranged on the outer periphery of the servo motor driving part, the cooling device comprises a fixing frame and a plurality of cutting fluid nozzles, an electromagnetic valve is arranged in the cutting fluid nozzle, the electromagnetic valve is used for controlling the ejection amount of the cutting fluid, so that the temperature of the cutting tool when machining the workpiece is adjusted; the fastening device extends into the tool shank, a trigger switch is arranged in the fastening device, the trigger switch is used for applying a load from the inside of the tool shank, and the effect of fixing the tool shank is achieved.

Description

Technical Field

[0001] This invention belongs to the field of drilling technology, and more specifically, relates to a tool holder type cutting device for a five-axis machining center. Background Technology

[0002] A five-axis machining center is a high-tech, high-precision machining center specifically designed for machining complex curved surfaces. It operates on a CNC lathe with five vertical axes (three linear axes and two rotary axes), and can coordinate its movements under the control of a Computer Numerical Control (CNC) system for production processing. The advantages of a five-axis machining center include the ability to machine complex shapes, improved production efficiency, reduced costs, and increased precision. Five-axis machining center systems have a significant impact on a country's aerospace, military, scientific research, precision instruments, and high-precision medical equipment industries. Furthermore, five-axis CNC machining center systems are the only means of machining impellers, blades, marine propellers, heavy-duty generator rotors, steam turbine rotors, large diesel engine crankshafts, and more.

[0003] Conventional five-axis machining center tool holders include spring clip type, hydraulic type, and heat shrink type. Hydraulic type is easy to operate, but has significant limitations for high-speed machining and has high maintenance costs. Heat shrink type is suitable for high-speed machining, but the assembly process requires heating and cooling, resulting in long operation time and low efficiency. Spring clip type has a wide range of applications and good versatility, but has lower machining accuracy. Taking a spindle tool holder clamping structure disclosed in Chinese invention patent literature (CN202320356830.2) as an example, this invention drives the rotation of the clamping plate through a driving component, so that the clamping plate generates upward axial pressure on the tool holder to ensure the clamping tightness. However, the part bearing the axial pressure is located at the edge of the tool holder, and the tool holder is prone to uneven stress, resulting in breakage or deformation.

[0004] To solve the above problems, we need a tool holder-type cutting device for a five-axis machining center that is easy to assemble and has a reasonable structure. Summary of the Invention

[0005] The purpose of this invention is to provide a tool holder-type cutting device for a five-axis machining center, which can achieve a secure assembly of the tool holder and is easy to use.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] The present invention discloses a tool holder type cutting device for a five-axis machining center, which is installed at the bottom of the vertical adjustment platform of the five-axis machining center. It includes a fastening device, a tool holder, and a cutting tool. A servo motor is provided inside the vertical adjustment platform. A cavity is opened at the bottom of the servo motor drive unit. The fastening device is installed inside the cavity. The upper part of the tool holder is detachably connected to the fastening device, and the lower part of the tool holder is detachably connected to the cutting tool. The cutting tool cuts the workpiece under the drive of the servo motor.

[0008] The servo motor drive unit is equipped with a cooling device on its outer periphery. The cooling device includes a fixed frame and several cutting fluid nozzles. The fixed frame is fixedly connected to the bottom of the vertical adjustment platform. The several cutting fluid nozzles are detachably installed on the fixed frame. The cutting fluid nozzles are equipped with solenoid valves, which are wirelessly connected to the terminal of the five-axis machining center to control the amount of cutting fluid sprayed out, thereby adjusting the temperature of the cutting tool when machining the workpiece.

[0009] The fastening device extends into the tool holder and is equipped with a trigger switch inside. When activated, the trigger switch applies a load from inside the tool holder to compress the cavity, thereby fixing the tool holder in place.

[0010] As a further improvement of the present invention, the above-mentioned tool holder includes a sleeve and a middle contact member. The sleeve is composed of a pair of semi-cylinders joined together. The middle of the two semi-cylinders has a tool holder riveting hole for riveting to ensure the tightness of the two semi-cylinders joined together. The outer shape of the head of the semi-cylinder is a semi-truncated cone shape, and the lower part of the semi-cylinder is a straight cylinder shape with threads. The middle of the sleeve has a mounting groove, and the middle contact member is engaged with the mounting groove. The upper part of the middle contact member is provided with a contact rod for triggering the trigger switch of the upper fastening device. After the trigger switch is triggered, it immediately responds to open the fastening device to fix the tool holder.

[0011] As a further improvement of the present invention, the above-mentioned fastening device further includes a pair of fastening plates, a pull rod, and a fastening block; one end of the pull rod is fixedly connected to the fastening block, and the other end is connected to the output end of a stepper motor provided inside the drive unit; the fastening plate has a semi-circular arc shape and is symmetrically distributed on the outer periphery of the pull rod, with a limiting block provided at the end near the tool holder, which matches the limiting groove provided inside the sleeve; the fastening block and the inner side of the limiting block are in contact; the fastening block is pulled upward by the pull rod and presses the fastening plates on both sides, so that the limiting block on the fastening plate presses the inner side of the sleeve towards the limiting groove, thereby achieving the purpose of fixing the tool holder.

[0012] As a further improvement of the present invention, the lower part of the above-mentioned contact element is provided with an infrared temperature sensor, which is wirelessly connected to the terminal of the five-axis machining center to detect the temperature of the cutting tool and adjust the amount of cutting fluid sprayed from the cooling device; this avoids the local temperature increase caused by insufficient cutting fluid, which could damage the cutting tool and the surface of the workpiece, and also avoids excessive cutting fluid, which could prevent the chips from being discharged smoothly, increase friction and heat, and reduce machining efficiency.

[0013] As a further improvement of the present invention, a pair of shoulders are provided in the middle of the outer side of the sleeve, and several limiting holes are opened at the upper shoulder. Several blocks are provided on the outer periphery of the cavity at the bottom of the drive part, which match and correspond to the limiting holes. The blocks and limiting holes are used to prevent the tool holder and the drive part from rotating relative to each other. A clamping groove is formed between the upper shoulder and the lower shoulder to facilitate the tool changing device to clamp the tool holder.

[0014] As a further improvement of the present invention, the cutting tool includes a threaded sleeve and a cutting head. The threaded sleeve has a hollow center and its internal thread is connected to the outer thread of the lower part of the sleeve for clamping the sleeve. The lower part of the sleeve has an axially formed hole that gradually decreases in size from the outside to the inside, which matches the rod body with a gradually decreasing diameter at the upper part of the cutting head. A ring of oblique grooves is formed on the surface of the rod body, which matches the inclined platform at the hollow center of the threaded sleeve. After the threaded sleeve and the sleeve are assembled, the cutting head is fixed.

[0015] As a further improvement of the present invention, a fastening groove is opened at the top of the cutter head body, and the inner diameter of the fastening groove gradually decreases from top to bottom; a fastening rod is fixedly installed at the bottom of the middle contact member, and the diameter of the fastening rod gradually decreases from top to bottom, matching the fastening groove; the cutter head is assembled upward into the sleeve and fixed by the rotation of the threaded sleeve, and the fastening rod penetrates into the fastening groove. As the fastening rod penetrates deeper, it will squeeze the inner wall of the fastening groove, so that the cutter head body and the inside of the sleeve are interference-fitted, thereby achieving the purpose of fixing the cutter head.

[0016] As a further improvement of the present invention, a tool magazine is provided on the side of the vertical adjustment platform, and a tool changing device is located below the tool magazine. The tool changing rod at the bottom of the tool changing device is driven by the motor above to move up and down to grab the tool holder and rotate to switch. Tool clamps are provided at both ends of the tool changing rod, and the two are symmetrical about the center of the tool changing rod. The protrusion in the middle of the tool clamp matches the clamping groove between the shoulder, making the tool holder replacement more stable.

[0017] As a further improvement of the present invention, the threaded sleeve is provided with a pair of tool riveting holes, symmetrically distributed on both sides of the threaded sleeve; the upper part of the cutter head has a through cutter head riveting hole, corresponding to the tool riveting hole; the rivet rivets the tool holder, the threaded sleeve and the cutter head, for fixing the tool holder and the cutting tool.

[0018] Compared to existing technologies, the advantages of this invention are as follows: The tool holder-type cutting device for a five-axis machining center can fix the tool holder, making the cutting process more stable and improving cutting accuracy; by setting a middle contact element inside the tool holder, the contact rod triggers the trigger switch of the fastening device after the tool holder is inserted into the cavity, resulting in a fast response speed and the ability to apply load to the inner wall of the cavity, making the tool holder assembly more secure; by setting an infrared temperature sensor below the middle contact element, the temperature of the lower cutting tool is monitored in real time, and the amount of cutting fluid is adjusted according to the cutting temperature, avoiding both insufficient cutting fluid leading to localized temperature increases that could damage the cutting tool and workpiece surface, and preventing... Excessive cutting fluid can prevent chips from being discharged smoothly, increasing friction and heat, and reducing machining efficiency. By setting a fastening groove at the top of the cutter head body and matching it with the fastening rod at the bottom of the middle contact, the fastening rod can be inserted into the fastening groove and press against the inner wall of the fastening groove, creating an interference fit between the cutter head body and the sleeve, thus fixing the cutter head. The sleeve consists of a pair of semi-cylinders, with the head of the semi-cylinder being a semi-circular frustum and the lower part being a straight cylinder with threads. The threaded sleeve can lock the lower part, ensuring that the upper part of the sleeve can be opened under load to compress the cavity. At the same time, it can be separated to facilitate the installation and replacement of the internal middle contact in the mounting groove, which has multiple benefits and is more in line with practical applications. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the cross-sectional structure of the drive unit of the present invention;

[0021] Figure 3 This is an enlarged schematic diagram of the structure at point A of the present invention;

[0022] Figure 4 This is an exploded view of the structure at the handle of the present invention;

[0023] Figure 5 This is a cross-sectional view of the handle of the present invention;

[0024] Figure 6 This is an enlarged schematic diagram of the structure at point B of the present invention;

[0025] Figure 7 This is a schematic diagram of the tool changing device of the present invention.

[0026] Explanation of the labels in the diagram:

[0027] 1 Vertical adjustment platform, 11 Drive unit, 111 Cavity, 112 Stop block, 2 Tool holder, 21 Sleeve, 211 Mounting groove, 212 Limiting groove, 214 Shoulder, 2141 Limiting hole, 215 Clamping groove, 216 Tool holder riveting hole, 22 Middle contact, 221 Contact rod, 222 Infrared temperature sensor, 223 Fastening rod, 3 Cutting tool, 31 Threaded sleeve, 311 Inclined platform, 312 Tool riveting hole, 32 Tool head, 321 Fastening groove, 322 Inclined groove, 323 Tool head riveting hole, 33 Rivet, 4 Fastening device, 41 Trigger switch, 42 Fastening plate, 421 Limiting block, 43 Pull rod, 44 Fastening block, 5 Cooling device, 51 Fixing frame, 52 Cutting fluid nozzle, 6 Tool changing device, 61 Tool changing rod, 62 Tool clamp, 7 Tool magazine. Detailed Implementation

[0028] A five-axis machining center includes a machine body and a horizontal adjustment platform, a mounting base, and a vertical adjustment platform 1 that are detachably installed inside the machine body. The horizontal adjustment platform is used to adjust the x and y axes of machining, the vertical adjustment platform 1 is used to adjust the z axis of machining, and the mounting base is used to adjust the a and c axes of machining. The x, y, z, a, and c axes form a five-axis linkage machining process.

[0029] Specific Implementation Example 1: Please refer to Figures 1-7 A tool holder-type cutting device for a five-axis machining center is installed at the bottom of the vertical adjustment platform 1 of the five-axis machining center. It includes a fastening device 4, a tool holder 2, and a cutting tool 3. A servo motor is installed inside the vertical adjustment platform 1. The servo motor is controlled by the terminal of the five-axis machining center and can make the tool holder 2 stop precisely at the tool change position. The bottom of the drive part 11 of the servo motor has a cavity 111. The fastening device 4 is installed inside the cavity 111. The upper part of the tool holder 2 is detachably connected to the fastening device 4, and the lower part of the tool holder 2 is detachably connected to the cutting tool 3 by a threaded connection. The cutting tool 3 rotates under the drive of the servo motor to cut the workpiece.

[0030] The servo motor drive unit 11 is provided with a cooling device 5 on its outer periphery. The cooling device 5 includes a fixed frame 51 and several cutting fluid nozzles 52. The fixed frame 51 is fixedly connected to the bottom of the vertical adjustment platform 1. Several mounting holes are opened on the fixed frame. Several cutting fluid nozzles 52 are detachably installed in the mounting holes of the fixed frame 51. The cutting fluid nozzles 52 are equipped with solenoid valves, which are wirelessly connected to the terminal of the five-axis machining center to control the amount of cutting fluid sprayed out, thereby adjusting the temperature of the cutting tool 3 when machining the workpiece.

[0031] The fastening device 4 extends into the inside of the handle 2. The fastening device 4 is equipped with a trigger switch 41, which is used to apply a load from the inside of the handle 2 to squeeze the cavity 111 after being turned on, so that the outside of the handle 2 and the inside of the cavity 111 fit tightly together, thereby achieving the effect of fixing the handle 2.

[0032] Specifically, the aforementioned tool holder 2 includes a sleeve 21 and a middle contact 22. The sleeve 21 is composed of a pair of semi-cylinders joined together. A tool holder riveting hole 216 is opened in the middle of the two semi-cylinders, which can facilitate the disassembly and replacement of the internal middle contact 22, and can also ensure the tightness of the sleeve 21 by riveting, thus maintaining the stability of the tool holder 2 during operation. The outer shape of the head of the semi-cylinder is a semi-truncated cone shape, with the outer diameter being the smallest on the side closest to the fastening device 4. The lower part of the semi-cylinder is a straight cylinder and is provided with threads. Each semi-cylinder of the sleeve 21 has a mounting groove 211 in the middle, and the middle contact 22 is engaged with the mounting groove 211. A contact rod 221 is provided on the upper part of the middle contact 22, which is used to activate the trigger switch 41 of the upper fastening device 4. When the trigger switch 41 is activated, it will immediately respond to open the fastening device 4, and apply a load to the inside of the sleeve 21 to compress the cavity 111 to fix the tool holder 2.

[0033] Specifically, the aforementioned fastening device 4 also includes a pair of fastening plates 42, a pull rod 43, and a fastening block 44; one end of the pull rod 43 is fixedly connected to the fastening block 44, and the other end is connected to the output end of a stepper motor provided inside the drive unit 11. The stepper motor is controlled by the five-axis machining center terminal and the trigger switch 41. After the trigger switch 41 is triggered, the pull rod 43 is pulled inward. When the tool holder 2 needs to be replaced under the control of the terminal, the pull rod 43 is pushed back to its original position; the fastening plate 42 has a semi-circular arc shape and is symmetrically distributed on the outer periphery of the pull rod 43, with the end closest to the tool holder 2. A limiting block 423 is provided, which matches the limiting groove 212 provided inside the sleeve 21; the fastening block 44 is in contact with the inner side of the limiting block 426. The fastening block 44 is pulled upward by the pull rod 43 and presses the fastening plates 42 on both sides, so that the limiting block 423 on the fastening plate 42 presses the inner side of the sleeve 21 towards the limiting groove 212. After the sleeve 21 is subjected to force, the upper part of the pair of semi-cylinders separates, and the semi-cylinders press the outer side of the cavity 111 that is close to them, so that the sleeve 21 and the cavity 111 are interference fit, thereby achieving the purpose of fixing the tool holder 2.

[0034] Specifically, the lower part of the aforementioned contact element 22 is equipped with an infrared temperature sensor 222, which is wirelessly connected to the terminal of the five-axis machining center. The infrared temperature sensor 222 utilizes the radiative heat effect, causing the detection device to receive radiant energy and thus raising its temperature. This causes a change in the temperature-dependent performance of the sensor, allowing the temperature of the cutting tool 3 to be detected based on the detected radiation, thereby adjusting the amount of cutting fluid sprayed from the cooling device 5. This avoids insufficient cutting fluid leading to localized temperature increases that could damage the cutting tool 3 and the workpiece surface, while also preventing excessive cutting fluid that could prevent chips from being discharged smoothly, increasing friction and heat, and reducing machining efficiency.

[0035] Specifically, a pair of shoulders 214 are provided on the middle of the outer side of the sleeve 21. Several limiting holes 2141 are opened at the upper shoulder 214. Several blocks 112 are provided on the outer periphery of the cavity 111 at the bottom of the drive unit 11, which match and correspond to the limiting holes 2141. The blocks 112 and the limiting holes 2141 are used to restrict the relative rotation between the tool holder 2 and the drive unit 11. A clamping groove 215 is formed between the upper shoulder 214 and the lower shoulder 214 to facilitate the tool changing device 6 to clamp the tool holder 2.

[0036] Specifically, the cutting tool 3 includes a threaded sleeve 31 and a cutting head 32. The threaded sleeve 31 has a hollow center and its internal threads are connected to the lower outer threads of the sleeve 21. The sleeve 21 is tightened by the threaded connection to ensure that the lower part of the sleeve 21 is firmly assembled. The head of the sleeve 21 is not tightly secured by the threaded sleeve 31 and has the ability to be slightly separated to both sides by the limiting block 423 to abut against the cavity 111. The lower part of the sleeve 21 has a hole that gradually decreases in diameter from the outside to the inside, which matches the gradually decreasing diameter of the upper part of the cutting head 32. A ring of inclined grooves 322 is opened on the surface of the cutting head, which matches the inclined platform 311 at the hollow center of the threaded sleeve 31. After the threaded sleeve 31 and the sleeve 21 are assembled, they achieve the purpose of fixing and supporting the cutting head 32.

[0037] Specifically, the top of the cutter head 32 has a fastening groove 321, the inner diameter of which gradually decreases from top to bottom; a fastening rod 223 is fixedly installed at the bottom of the middle contact member 22, the diameter of which gradually decreases from top to bottom, matching the fastening groove 321; when the threaded sleeve 31 is rotated to assemble the cutter head 32 into the sleeve 21, as the threaded sleeve 31 rotates, the fastening rod 223 gradually penetrates into the fastening groove 321, and the fastening rod 223 will press against the inner wall of the fastening groove 321 as it penetrates, so that the outer wall of the cutter head 32 presses against the inside of the sleeve 321, so that the cutter head 32 can be interference-fitted with the inside of the sleeve 21, thereby achieving the purpose of fixing the cutter head 32.

[0038] Specifically, a tool magazine 7 is provided on the side of the vertical adjustment platform 1, and a tool changing device 6 is located below the tool magazine 7. The tool changing rod 61 at the bottom of the tool changing device 6 is driven by the motor above to move up and down to grab the tool holder 2 and rotate to switch. Tool clamps 62 are provided at both ends of the tool changing rod 61. The two are symmetrical about the center of the tool changing rod 61. The protrusion in the middle of the tool clamp 62 matches the clamping groove 215 between the shoulder 214, which makes the tool holder 2 changing more stable and thus improves the machining accuracy.

[0039] Specifically, the threaded sleeve 31 is provided with a pair of tool riveting holes 312, symmetrically distributed on both sides of the threaded sleeve 31; the upper part of the cutter head 32 has a through-hole cutter head riveting hole 323, corresponding to the tool riveting hole 312; the rivet 33 rivets the tool holder riveting hole 216 of the sleeve 21, the tool riveting hole 312 of the threaded sleeve 31 and the tool head riveting hole 323 of the cutter head 32. The rivet 33 constrains the sleeve 21, the threaded sleeve 31 and the cutter head 32 to prevent axial rotation. The threaded sleeve 31 constrains the lower part of the sleeve 21 of the tool holder 2 to fit more tightly. The two together constrain to achieve the purpose of fixing the tool holder 2 and the cutting tool 3.

[0040] During operation, when machining a workpiece, the infrared temperature sensor 222 at the bottom of the contact element 22 inside the tool holder 2 monitors the heat radiated and conducted at the tool tip 32 below it in real time. When the temperature at the tool tip 32 is too high, the infrared temperature sensor 222 transmits a signal to the terminal of the five-axis machining center. The terminal of the five-axis machining center issues a command to the cooling device 5 to increase the opening degree of the solenoid valve of the cutting fluid nozzle 52, thereby increasing the amount of cutting fluid sprayed. This avoids insufficient cutting fluid leading to localized temperature increases that could damage the cutting tool 3 and the workpiece surface. This avoids excessive cutting fluid, which can prevent chips from being properly discharged, increasing friction and heat, and reducing machining efficiency. When it is necessary to change the tool holder 2, one end of the tool chuck 62 of the tool changing device 6 holds the new tool holder 2 selected by the tool magazine 7, and the other end holds the old tool holder 2 at the position of the drive unit 11. The internal motor of the five-axis machining center's terminal control tool changing device 6 drives the tool changing rod 61 to move down until the old tool holder 2 is disengaged from the cavity, rotates 180 degrees to switch the positions of the new tool holder 2 and the old tool holder 2, and then the internal motor of the tool changing device 6 drives the tool changing rod 61 to move up. As the new tool holder 2 enters the cavity 111, the contact rod 221 on the upper part of the contact member 22 inside the new tool holder 2 rises and touches the trigger switch 41. The pull rod 43 of the fastening device 4 pulls the fastening block 44 upward. As the fastening block 44 moves upward, the fastening plates 42 on both sides of the fastening block 44 press against the inside of the sleeve 21, so that the outer wall of the sleeve 21 is tightly against the inner wall of the cavity 111, thereby achieving the purpose of pressing the tool holder 2 to make its installation more stable; the fastening groove 321 at the top of the cutting tool 3's head 32 rod body and the fastening groove 321 at the bottom of the contact member 22... The fastening rod 223 is matched so that when the fastening rod 223 is inserted into the fastening groove 321, it presses against the inner wall of the fastening groove 321, so that the cutter head 32 rod body and the sleeve 21 are interference fit, thereby fixing the cutter head 32, making the cutting process more stable and improving the cutting accuracy. The lower straight cylinder of the sleeve 21 is locked by the threaded sleeve 31. The head of the sleeve 21 can be separated after being slightly separated to both sides by the limiting block 423 to abut against the cavity 111. This makes it easier to install and replace the internal contact part 22 in the mounting groove 211, which is more in line with actual applications.

[0041] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A tool holder-type cutting device for a five-axis machining center, installed at the bottom of the vertical adjustment platform (1) of the five-axis machining center, characterized in that: Includes a fastening device (4), a tool holder (2), and a cutting tool (3). The vertical adjustment platform (1) is equipped with a servo motor. The bottom of the servo motor drive unit (11) has a cavity (111). The fastening device (4) is installed inside the cavity (111). The upper part of the tool holder (2) is detachably connected to the fastening device (4), and the lower part of the tool holder (2) is detachably connected to the cutting tool (3). The cutting tool (3) is used to cut the workpiece. The servo motor drive unit (11) is provided with a cooling device (5) on its outer periphery. The cooling device (5) includes a fixed frame (51) and several cutting fluid nozzles (52). The fixed frame (51) is fixedly connected to the bottom of the vertical adjustment platform (1). Several cutting fluid nozzles (52) are detachably installed on the fixed frame (51). The cutting fluid nozzles (52) are equipped with solenoid valves and are wirelessly connected to the terminal of the five-axis machining center to control the amount of cutting fluid sprayed. The fastening device (4) extends into the inside of the handle (2), and the fastening device (4) is equipped with a trigger switch (41) for fixing the handle (2) after opening. The tool handle (2) includes a sleeve (21) and a middle contact (22). The sleeve (21) is a pair of semi-cylinders joined together. The middle of the two semi-cylinders has a tool handle riveting hole (216) for riveting to ensure the tightness of the two semi-cylinders. The middle of the sleeve (21) has a mounting groove (211) and the middle contact (22) is engaged with the mounting groove (211). The upper part of the middle contact (22) is provided with a contact rod (221) for triggering the trigger switch (41) of the upper fastening device (4).

2. The tool holder-type cutting device for a five-axis machining center according to claim 1, characterized in that: The fastening device (4) also includes a pair of fastening plates (42), a pull rod (43) and a fastening block (44); one end of the pull rod (43) is fixedly connected to the fastening block (44), and the other end is connected to the output end of the stepper motor provided inside the drive unit (11); the fastening plate (42) has a semi-circular arc shape and is symmetrically distributed on the outer periphery of the pull rod (43). A limiting block (423) is provided at one end near the handle (2), which matches the limiting groove (212) provided inside the handle (2); the fastening block (44) is in contact with the inner side of the limiting block (423) to press the inner side of the handle (2) to fix the handle (2).

3. The tool holder-type cutting device for a five-axis machining center according to claim 1, characterized in that: The lower part of the contact element (22) is equipped with an infrared temperature sensor (222), which is wirelessly connected to the terminal of the five-axis machining center to detect the temperature of the cutting tool (3) and adjust the amount of cutting fluid sprayed from the cooling device (5).

4. The tool holder-type cutting device for a five-axis machining center according to claim 1, characterized in that: The sleeve (21) has a pair of shoulders (214) in the middle of its outer side. The upper shoulder (214) has several limiting holes (2141). The cavity (111) at the bottom of the drive unit (11) has several stops (112) on its outer periphery, which match and correspond to the limiting holes (2141). A clamping groove (215) is formed between the upper shoulder (214) and the lower shoulder (214) for clamping and switching.

5. The tool holder-type cutting device for a five-axis machining center according to claim 1, characterized in that: The cutting tool (3) includes a threaded sleeve (31) and a cutting head (32). The threaded sleeve (31) has a hollow center and its internal thread is connected to the lower outer thread of the tool holder (2). The lower part of the tool holder (2) has a hole that gradually decreases in diameter from the outside to the inside, which matches the rod body with a gradually decreasing diameter at the top of the cutting head (32) and is used to fix the cutting head (32).

6. The tool holder-type cutting device for a five-axis machining center according to claim 1, characterized in that: The vertical adjustment platform (1) is provided with a tool magazine (7) on the side. The tool changing device (6) is located below the tool magazine (7). The tool changing rod (61) at the bottom of the tool changing device (6) is provided with tool clamps (62) at both ends. The tool clamps (62) have a protrusion in the middle for clamping the tool handle (2).

7. The tool holder-type cutting device for a five-axis machining center according to claim 5, characterized in that: The top of the cutter head (32) has a fastening groove (321), and the inner diameter of the fastening groove (321) gradually decreases from top to bottom; the bottom of the middle contact (22) is fixedly installed with a fastening rod (223), and the diameter of the fastening rod (223) gradually decreases from top to bottom, matching the fastening groove (321).

8. The tool holder-type cutting device for a five-axis machining center according to claim 5, characterized in that: The cutter head (32) has a groove (322) on its surface, which matches the inclined platform (311) in the hollow part of the threaded sleeve (31) to support the cutter head (32).

9. The tool holder-type cutting device for a five-axis machining center according to claim 5, characterized in that: The threaded sleeve (31) is provided with a pair of tool riveting holes (312), which are symmetrically distributed on both sides of the threaded sleeve (31); the upper part of the cutter head (32) has a through cutter head riveting hole (323), which corresponds to the tool riveting hole (312); the rivet (33) rivets the tool holder (2), the threaded sleeve (31) and the cutter head (32) to fix the tool holder (2) and the cutting tool (3).

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