Numerical control milling cutter device convenient for replacing milling cutter

Abstract

A chuck is welded at the bottom end of a connecting rod of a machine tool, the milling cutter is mounted through a cavity of the chuck, a sleeve is sleeved on the outer wall of the chuck, and the sleeve is connected with the machine tool through a spring; a plurality of openings are formed in the cavity wall of the chuck, the clamping blocks are installed in a penetrating mode, the iron blocks on the upper end faces and the lower end faces of the clamping blocks are embedded into the movable grooves in the upper end faces and the lower end faces of the corresponding openings, the iron blocks and the movable grooves are connected through springs, and outward spring force is provided for the clamping blocks. The inner wall of the sleeve abuts against and makes contact with the outer side end face of each clamping block, and limiting and locking are achieved through cooperation of the clamping blocks on the inner sides of the clamping blocks and the clamping grooves in the outer wall face of the milling cutter. A groove is formed in the upper portion, abutting against and making contact with the clamping block, of the inner wall of the sleeve and used for enabling the clamping block to slide into the groove under the action of spring force when the sleeve is pulled downwards, and therefore limiting locking of the milling cutter is released. The milling cutter replacing tool solves the problems that an existing milling cutter replacing tool is complex in structure, tedious in replacing process, high in operation danger, inconvenient in milling cutter replacing and the like.

Description

Technical Field

[0001] This utility model relates to, but is not limited to, the field of CNC milling cutter technology, and particularly to a CNC milling cutter device that facilitates the replacement of milling cutters. Background Technology

[0002] With the increasingly widespread application of CNC machine tools in industrial production, workers are paying more and more attention to them. The part of a CNC machine tool that directly contacts the workpiece is the milling cutter fixed in the chuck. Since frequent cutter changes are required during operation, how to quickly and conveniently change milling cutters has become a key focus for CNC machine tools.

[0003] Traditionally, when changing milling cutters on CNC machine tools, the method involves inserting the cutter into the collet and securing it in the collet by tightening the bolts or operating the collet using nuts and bolts or triangular grippers on both sides. This requires unscrewing several nuts each time the cutter needs to be replaced. Triangular grippers require hydraulic devices, which are complex in structure, making the replacement process cumbersome, dangerous, and inconvenient. Utility Model Content

[0004] The purpose of this utility model is to solve the above-mentioned technical problems. This utility model provides a CNC milling cutter device that facilitates the replacement of milling cutters, so as to solve the problems of the existing replacement methods for milling cutters in CNC machine tools, which use replacement tools with complex structures, cumbersome replacement processes, high operational risks, and inconvenience in replacing milling cutters.

[0005] The technical solution of this utility model: This utility model embodiment provides a CNC milling cutter device that facilitates the replacement of milling cutters, including: machine tool 1, bearing 2, connecting rod 3, chuck 4, clamping block 5, iron block 7, first spring 8, sleeve 9, second spring 13, and milling cutter 18;

[0006] The machine tool 1 is provided with a connecting rod 3 at its bottom end, and the connecting rod 3 is connected to the machine tool 1 by a bearing 2. A chuck 4 is welded to the bottom end of the connecting rod 3. The chuck 4 is a cylindrical cavity structure with an open bottom end, which is used to fix the milling cutter 18 through its cavity. A sleeve 9 is sleeved on the outer wall of the chuck 4. The sleeve 9 is connected to the bottom end of the machine tool 1 by at least two second springs 13.

[0007] The cavity wall of the clamp 4 is evenly provided with multiple openings along the circumference. Each opening is through which a clamping block 5 is installed. The upper and lower end faces of the openings of the clamp 4 are provided with movable grooves 6. Each clamping block 5 is welded with an iron block 7 on its upper and lower end faces, so that the iron block 7 is embedded in the movable groove 6 at the corresponding position. The inner end face of the iron block 7 is connected to the groove wall of the movable groove 6 by a first spring 8, so that the first spring 8 provides a radially outward spring force to the clamping block 5.

[0008] The inner wall of the sleeve 9, which is fitted on the outer wall of the chuck 4, abuts against the outer end face of each clamping block 5 to press the inner end face of each clamping block 5 into the cavity of the chuck 4. The clamping block 16 provided on the inner end face of each clamping block 5 cooperates with the corresponding groove 17 opened on the outer wall of the milling cutter 18 to limit and lock the axial position of the milling cutter 18.

[0009] A groove 10 is provided above the inner wall of the sleeve 9 that abuts against the clamping block 5. When the sleeve 9 is pulled down, the clamping block 5 slides into the corresponding groove 10 under the spring force of the first spring 8, thereby releasing the clamping block 5 from the limiting lock of the milling cutter 18, thus realizing the convenient replacement of the milling cutter 18.

[0010] Optionally, the CNC milling cutter device for easy cutter replacement described above further includes: a slider 12;

[0011] The outer wall of the clamp 4 between the two circumferentially adjacent clamping blocks 5 is provided with slide rails 11, and each slide rail 11 is embedded with a slider 12. The top of each slider 12 is welded to the inner wall of the sleeve 9, so that the sleeve 9 slides up and down along the outer wall of the clamp 4.

[0012] The slide rail 11 and the slider 12 are trapezoidal in cross-sectional shape to prevent the slider 12, which is fitted into the slide rail 11, from disengaging from the slide rail 11, and the sleeve 9 always slides up and down on the outer wall of the chuck 4.

[0013] Optionally, in the CNC milling cutter device described above that facilitates cutter replacement,

[0014] A square post 14 is welded to the middle position of the top end of the chuck 4 cavity, and a square groove 15 is opened at the middle position of the top end face of the milling cutter 18. The square post 14 and the square groove 15 are corresponding in position, on the same axis, and matched in size. They are used to make the square post 14 of the chuck 4 fit into the square groove 15 of the milling cutter 18 when the milling cutter 18 is installed, and to limit the shaking of the milling cutter 18 after installation.

[0015] Optionally, in the CNC milling cutter device described above that facilitates cutter replacement,

[0016] Multiple locking blocks 16 are welded axially on the inner end face of each clamping block 5. Multiple slots 17 corresponding to the positions of the locking blocks 16 are opened circumferentially on the outer wall of the milling cutter 18, so that after the milling cutter 18 is installed in the cavity of the chuck 4, the locking blocks 16 on each clamping block 5 respectively fit into the slots 17 at the corresponding positions on the milling cutter 18, thereby preventing the milling cutter 18 from shaking up and down.

[0017] Optionally, in the CNC milling cutter device described above that facilitates cutter replacement,

[0018] The shape of the inner end face of the clamping block 5 matches the shape of the outer wall of the milling cutter 18, and both are arc-shaped. The shape of the inner end face of the clamping block 16 matches the shape of the inner wall of the clamping groove 17, and both are arc-shaped.

[0019] Optionally, in the CNC milling cutter device described above that facilitates cutter replacement,

[0020] The clamp 4 has four openings along the same axis, in the front, back, left and right directions, and four clamping blocks 5 are installed through it. The four clamping blocks 5 installed in this circumferential direction are a group of clamping blocks.

[0021] The chuck 4 is equipped with two sets of clamping blocks along the axial direction, and there are a total of 8 clamping blocks 5, which makes the clamping of the milling cutter 18 more secure.

[0022] The beneficial effects of this utility model are as follows: This utility model provides a CNC milling cutter device that facilitates the replacement of milling cutters, and compared with milling cutters in the prior art, it has the following beneficial effects:

[0023] First, the CNC milling cutter device that facilitates the replacement of milling cutters is equipped with a clamping block 5, a sleeve 9, a groove 10, a slide rail 11, a slider 12, and a second spring 13. When the sleeve 9 is pulled down, the slider 12 on the inner wall of the sleeve 9 slides down in the slide rail 11. When the groove 10 and the outer end of the clamping block 5 are in contact, the first spring 8 at the upper and lower ends of the clamping block 5 pushes the iron block 7 to move outward in the movable groove 6. The iron block 7 pushes the clamping block 5 to move outward, and the inner end of the clamping block 5 disengages from the milling cutter 18. At this time, the milling cutter 18 can be removed and replaced with another milling cutter 18. The structure of this device is simple, making the replacement of the milling cutter 18 convenient and quick, and there are no safety hazards during operation.

[0024] Secondly, the CNC milling cutter device for easy cutter replacement is equipped with a square column 14, a square groove 15, a locking block 16, and a locking slot 17. The square column 14 is welded to the middle position of the top of the chuck 4 cavity, and the square groove 15 is opened at the top of the milling cutter 18. The positions of the square column 14 and the square groove 15 correspond, and the square column 14 can fit snugly into the square groove 15. The locking block 16 is welded to the inner end of the chuck 5, and the locking slot 17 that matches the locking block 16 is opened on the outer wall of the milling cutter 18. The locking block 16 fits snugly into the locking slot 17. Due to the shape limitation of the square column 14 and the square groove 15, it is ensured that the milling cutter 18 will not slip left or right in the cavity of the chuck 4. The locking block 16 and the locking slot 17 ensure that the milling cutter 18 will not slip up or down in the cavity of the chuck 4, thus ensuring cutting accuracy. Attached Figure Description

[0025] The accompanying drawings are provided to further illustrate the technical solution of this utility model and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solution of this utility model and do not constitute a limitation on the technical solution of this utility model.

[0026] Figure 1 A cross-sectional view of the overall structure of a CNC milling cutter device for easy cutter replacement provided in an embodiment of this utility model;

[0027] Figure 2 for Figure 1 A partially enlarged schematic diagram of region A in the CNC milling cutter device for easy cutter replacement provided in the illustrated embodiment;

[0028] Figure 3 for Figure 1 The illustrated embodiment provides a top sectional view of a CNC milling cutter device for easy cutter replacement;

[0029] Figure 4 for Figure 3 A partially enlarged schematic diagram of region B in the CNC milling cutter device for easy cutter replacement provided in the illustrated embodiment;

[0030] Figure 5 for Figure 3 The illustrated embodiment shows a cross-sectional view along CC of a CNC milling cutter device for easy cutter replacement.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Machine tool; 2. Bearing; 3. Connecting rod; 4. Chuck; 5. Clamping block; 6. Movable groove; 7. Iron block; 8. First spring; 9. Sleeve; 10. Groove; 11. Slide rail; 12. Slider; 13. Second spring; 14. Square column; 15. Square groove; 16. Locking block; 17. Locking slot; 18. Milling cutter. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

[0034] As explained in the background section, the necessity of changing milling cutters on CNC machine tools is evident, and traditional CNC machine tools have certain shortcomings in this area: the replacement tools used are complex, the replacement process is cumbersome, and the operation is highly dangerous, making milling cutter replacement very inconvenient. Furthermore, new milling cutters are coated with wax oil for protection; however, the presence of this wax oil makes the cutter prone to slipping within the chuck, leading to cutting deviations.

[0035] To address the aforementioned problems, this utility model provides a CNC milling cutter device that facilitates the replacement of milling cutters.

[0036] The present invention provides the following specific embodiments, which can be combined with each other. For the same or similar concepts or processes, they will not be described again in some embodiments.

[0037] See Figures 1 to 5 This utility model provides a CNC milling cutter device that facilitates the replacement of milling cutters. Its main structure includes: a machine tool 1, a bearing 2, a connecting rod 3, a chuck 4, a clamping block 5, an iron block 7, a first spring 8, a sleeve 9, a second spring 13, and a milling cutter 18.

[0038] like Figure 1 As shown, in this embodiment of the present invention, a connecting rod 3 is installed at the bottom of the machine tool 1, and the connecting rod 3 is connected to the machine tool 1 through a bearing 2. A chuck 4 is welded to the bottom of the connecting rod 3. The chuck 4 is configured as a cylindrical cavity structure with an open bottom, which is used to fix and install the milling cutter 18 through its cavity. A sleeve 9 is sleeved on the outer wall of the chuck 4. The sleeve 9 is connected to the bottom of the machine tool 1 through at least two second springs 13. Specifically, the two ends of the second springs 13 are welded to the bottom of the machine tool 1 and the top of the sleeve 9, respectively.

[0039] In this embodiment of the invention, the cavity wall of the chuck 4 is uniformly provided with multiple openings along the circumference, and a clamping block 5 is installed through each opening. Movable grooves 6 are provided on the upper and lower end faces of the openings of the chuck 4. Iron blocks 7 are welded to the upper and lower end faces of each clamping block 5, so that the iron blocks 7 are embedded into the corresponding movable grooves 6. A first spring 8 connects the inner end face of the iron block 7 to the groove wall of the movable groove 6, providing a radially outward spring force to the clamping block 5. Specifically, the two ends of the first spring 8 are welded to the inner end face of the iron block 7 and the groove wall of the movable groove 6, respectively.

[0040] In this embodiment of the present invention, the inner wall of the sleeve 9 sleeved on the outer wall of the chuck 4 abuts against the outer end face of each clamping block 5 to press the inner end face of each clamping block 5 into the cavity of the chuck 4. Thus, the locking block 16 provided on the inner end face of each clamping block 5 cooperates with the corresponding slot 17 opened on the outer wall of the milling cutter 18 to limit and lock the axial position of the milling cutter 18, so that the milling cutter 18 cannot move up and down.

[0041] In this embodiment of the utility model, a groove 10 is provided above the inner wall of the sleeve 9 that abuts against the clamping block 5. When the sleeve 9 is pulled down, the clamping block 5 slides into the corresponding groove 10 under the spring force of the first spring 8, thereby releasing the clamping block 5 from the limiting lock of the milling cutter 18, thus realizing the replacement of the milling cutter 18.

[0042] In a specific implementation of this utility model embodiment, the outer end face of the clamping block 5 is arc-shaped, and correspondingly, the shape of the groove 10 is consistent with the shape of the outer end face of the clamping block 5. Its function is to ensure that the outer end face of the clamping block 5 can slide into and out of the groove 10 better, and the consistent shape ensures that the clamping block 5 can be stable and not shake after sliding into the groove 10.

[0043] In one implementation of this utility model embodiment, such as Figure 3As shown, the CNC milling cutter device for easy cutter replacement also includes a slider 12. In this implementation, a slide rail 11 is provided on the outer wall of the chuck 4 between two circumferentially adjacent clamping blocks 5, and a slider 12 is embedded in each slide rail 11. The top of each slider 12 is welded to the inner wall of the sleeve 9, so that the sleeve 9 slides up and down along the outer wall of the chuck 4.

[0044] In this implementation, the cross-sectional shape of the slide rail 11 is set to trapezoidal. Correspondingly, the shape of the slider 12 is the same as that of the slide rail 11. Its function is to allow the slider 12 to fit inside the slide rail 11. The trapezoidal shape ensures that the slider 12 and the slide rail 11 will not separate, and ensures that the sleeve 9 always slides on the outer wall of the chuck 4. The top of each slider 12 is welded to the inner wall of the sleeve 9.

[0045] In one implementation of this utility model embodiment, such as Figure 1 , Figure 3 and Figure 5 As shown, a square post 14 is welded to the middle position of the top of the chuck 4 cavity, and a square groove 15 is formed at the middle position of the top end face of the milling cutter 18. The square post 14 and the square groove 15 are corresponding in position, on the same axis, and are the same size. This allows the square post 14 of the chuck 4 to fit snugly into the square groove 15 of the milling cutter 18, preventing the milling cutter 18 from continuing to wobble after the square post 14 is stuck in the square groove 15.

[0046] In this implementation, the function of the square column 14 and square groove 15 is as follows: each time the milling cutter 18 is inserted into the cavity of the chuck 4, as long as it fits and is locked in place with the square column 14, the milling cutter 18 will be in the middle position in the cavity of the chuck 4, which is convenient for clamping.

[0047] In one implementation of this utility model embodiment, such as Figures 1 to 4 As shown, a locking block 16 is welded axially to the inner end face of each clamping block 5, and a slot 17 corresponding to the position of the locking block 16 is formed on the outer wall of the milling cutter 18 in the circumferential direction. In a specific embodiment, three locking blocks 16 are respectively provided on the inner end face of each clamping block 5, and the number of slots 17 corresponding to each clamping block 5 is the same as the number of locking blocks 16. The size of the locking blocks 16 is set so that they can fit snugly into the slots 17. The complete fit between the locking blocks 16 and the slots 17 prevents the milling cutter 18 from wobbling up and down.

[0048] In one implementation of this utility model embodiment, such as Figure 1 , Figure 3 and Figure 4As shown, the shape of the inner end face of the clamping block 5 matches the shape of the outer wall surface of the milling cutter 18, and both are arc-shaped. The shape of the inner end face of the locking block 16 matches the shape of the inner wall surface of the locking groove 17, and both are arc-shaped. The function of the above structures in this implementation is that the matching arc shape allows the clamping block 5 and the milling cutter 18, and the locking block 16 and the locking groove 17 to fit more tightly, so that the clamping block 5 can better clamp the milling cutter 18.

[0049] The working principle of the CNC milling cutter device for easy cutter replacement provided in this embodiment of the utility model is as follows:

[0050] When using the machine tool, first ensure that the entire machine tool 1 is stopped. Hold the sleeve 9 and pull it downwards. Since the sleeve 9 is fitted onto the outer wall of the chuck 4, and a slide rail 11 is provided on the outer wall of the chuck 4, with a slider 12 embedded in the slide rail 11 and the top of the slider 12 welded to the inner wall of the sleeve 9, pulling the sleeve 9 downwards will cause it to slide down the outer wall of the chuck 4. Because a clamping block 5 passes through the cavity wall of the chuck 4, and the inner wall of the sleeve 9 abuts against the outer end of the clamping block 5, and a groove 10 is provided above the point where the inner wall of the sleeve 9 abuts against the outer end of the clamping block 5, the groove 10 will move downwards with the sleeve 9. When the groove 10 moves to the position of the outer end of the clamping block 5, the pressure on the outer wall of the clamping block 5 disappears. At this time, the first springs 8 on the upper and lower sides of the clamping block 5 will undergo elastic deformation. Under the action of the elastic force, the iron block 7 moves outwards in the movable groove 6. 7. Push the clamping block 5 outward. Because the outer end of the clamping block 5 is consistent with the groove 10, the clamping block 5 will slide into the groove 10. At this time, the inner end of the clamping block 5 will disengage from the milling cutter 18 and retract into the chuck 4 cavity wall. The locking block 16 on the inner end of the clamping block 5 will disengage from the slot 17 and retract into the chuck 4 cavity wall. Remove the milling cutter 18 and push the other required milling cutter 18 into the chuck 4 cavity. Because the positions of the square column 14 and the square groove 15 match, the square column 14 can fit into the square groove 15. Release the sleeve 9. The second spring 13 between the sleeve 9 and the machine tool 1 will pull the sleeve 9 upward under the action of the elastic force. The sleeve 9 moves upward, and the groove 10 and the clamping block 5 are misaligned. Because the space becomes smaller, the clamping block 5 moves inward. The locking block 16 on the inner end of the clamping block 5 fits into the slot 17. The inner end of the clamping block 5 fits into the outer wall of the milling cutter 18. The operation is now complete.

[0051] The CNC milling cutter device for easy cutter replacement provided in this embodiment of the invention has the following advantages compared with existing milling cutters:

[0052] First, the CNC milling cutter device that facilitates the replacement of milling cutters is equipped with a clamping block 5, a sleeve 9, a groove 10, a slide rail 11, a slider 12, and a second spring 13. When the sleeve 9 is pulled down, the slider 12 on the inner wall of the sleeve 9 slides down in the slide rail 11. When the groove 10 and the outer end of the clamping block 5 are in contact, the first spring 8 at the upper and lower ends of the clamping block 5 pushes the iron block 7 to move outward in the movable groove 6. The iron block 7 pushes the clamping block 5 to move outward, and the inner end of the clamping block 5 disengages from the milling cutter 18. At this time, the milling cutter 18 can be removed and replaced with another milling cutter 18. The structure of this device is simple, making the replacement of the milling cutter 18 convenient and quick, and there are no safety hazards during operation.

[0053] Secondly, the CNC milling cutter device for easy cutter replacement is equipped with a square column 14, a square groove 15, a locking block 16, and a locking slot 17. The square column 14 is welded to the middle position of the top of the chuck 4 cavity, and the square groove 15 is opened at the top of the milling cutter 18. The positions of the square column 14 and the square groove 15 correspond, and the square column 14 can fit snugly into the square groove 15. The locking block 16 is welded to the inner end of the chuck 5, and the locking slot 17 that matches the locking block 16 is opened on the outer wall of the milling cutter 18. The locking block 16 fits snugly into the locking slot 17. Due to the shape limitation of the square column 14 and the square groove 15, it is ensured that the milling cutter 18 will not slip left or right in the cavity of the chuck 4. The locking block 16 and the locking slot 17 ensure that the milling cutter 18 will not slip up or down in the cavity of the chuck 4, thus ensuring cutting accuracy.

[0054] It should be noted that, in the optional embodiments of this utility model, such as Figure 1 and Figure 3 As shown, four openings are provided on the same axis of the chuck 4 in the circumferential direction, and four clamping blocks 5 are installed through the chuck 4 in the circumferential direction. The four clamping blocks 5 installed in this circumferential direction are a group. In addition, two groups of clamping blocks 5 are installed on the chuck 4 in the axial direction. The total number of clamping blocks 5 is 8, which makes the clamping of the milling cutter 18 more secure.

[0055] Although the embodiments disclosed in this utility model are as described above, the content is only for the purpose of facilitating understanding of this utility model and is not intended to limit this utility model. Any person skilled in the art to which this utility model pertains may make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed in this utility model, but the patent protection scope of this utility model shall still be determined by the scope defined in the appended claims.

Claims

1. A CNC milling cutter device for easy cutter replacement, characterized in that, include: Machine tool (1), bearing (2), connecting rod (3), chuck (4), clamping block (5), iron block (7), first spring (8), sleeve (9), second spring (13), milling cutter (18); The machine tool (1) is connected to the bottom end by a connecting rod (3), and the connecting rod (3) is connected to the machine tool (1) by a bearing (2). A chuck (4) is welded to the bottom end of the connecting rod (3). The chuck (4) is a columnar cavity structure with an open bottom end, which is used to fix and install a milling cutter (18) through its cavity. A sleeve (9) is sleeved on the outer wall of the chuck (4). The sleeve (9) is connected to the bottom end of the machine tool (1) by at least two second springs (13). The cavity wall of the clamp (4) is evenly provided with multiple openings along the circumference, and a clamping block (5) is installed through each opening. The upper and lower end faces of the opening of the clamp (4) are provided with movable grooves (6). Iron blocks (7) are welded to the upper and lower end faces of each clamping block (5) so that the iron blocks (7) are embedded in the movable grooves (6) at the corresponding positions. The inner end face of the iron block (7) is connected to the groove wall of the movable groove (6) by a first spring (8) so that the first spring (8) provides a radially outward spring force to the clamping block (5). The inner wall of the sleeve (9) fitted on the outer wall of the chuck (4) abuts against the outer end face of each clamping block (5) to press the inner end face of each clamping block (5) into the cavity of the chuck (4). Thus, the clamping block (16) provided on the inner end face of each clamping block (5) cooperates with the corresponding groove (17) opened on the outer wall of the milling cutter (18) to limit and lock the axial position of the milling cutter (18). The inner wall of the sleeve (9) is provided with a groove (10) above the clamping block (5) to abut against it. When the sleeve (9) is pulled down, the clamping block (5) slides into the corresponding groove (10) under the spring force of the first spring (8), thereby releasing the clamping block (5) from the limiting lock of the milling cutter (18) and realizing the convenient replacement of the milling cutter (18).

2. The CNC milling cutter device for easy cutter replacement according to claim 1, characterized in that, Also includes: Slider (12); Slide rails (11) are respectively provided on the outer wall of the clamp (4) between two circumferentially adjacent clamps (5), and a slider (12) is embedded in each slide rail (11). The top of each slider (12) is welded to the inner wall of the sleeve (9), so that the sleeve (9) slides up and down along the outer wall of the clamp (4). The slide rail (11) and the slider (12) are set to trapezoidal cross-sectional shape to prevent the slider (12) fitted in the slide rail (11) from disengaging from the slide rail (11), and the sleeve (9) always slides up and down on the outer wall of the chuck (4).

3. The CNC milling cutter device for easy cutter replacement according to claim 1, characterized in that, A square post (14) is welded to the middle position of the top end of the chuck (4) cavity, and a square groove (15) is opened at the middle position of the top end face of the milling cutter (18). The square post (14) and the square groove (15) are in corresponding positions, on the same axis, and are matched in size. They are used to make the square post (14) of the chuck (4) fit into the square groove (15) of the milling cutter (18) when the milling cutter (18) is installed, and to limit the shaking of the milling cutter (18) after installation.

4. The CNC milling cutter device for easy cutter replacement according to claim 1, characterized in that, Multiple locking blocks (16) are welded axially on the inner end face of each clamping block (5). Multiple slots (17) corresponding to the positions of the locking blocks (16) are opened circumferentially on the outer wall of the milling cutter (18). This allows the locking blocks (16) on each clamping block (5) to fit into the slots (17) at the corresponding positions on the milling cutter (18) after the milling cutter (18) is installed in the cavity of the chuck (4), thereby preventing the milling cutter (18) from shaking up and down.

5. The CNC milling cutter device for easy cutter replacement according to claim 1, characterized in that, The shape of the inner end face of the clamping block (5) matches the shape of the outer wall of the milling cutter (18), and both are arc-shaped. The shape of the inner end face of the clamping block (16) matches the shape of the inner wall of the clamping groove (17), and both are arc-shaped.

6. The CNC milling cutter device for easy cutter replacement according to any one of claims 1 to 5, characterized in that, The clamp (4) has four openings along the circumference in the same axial position, and four clamping blocks (5) are installed through the front, back, left and right. The four clamping blocks 5 installed in the circumference form a set of clamping blocks. The chuck (4) is equipped with two sets of clamping blocks along the axial direction, and the total number of clamping blocks (5) is 8, which makes the clamping of the milling cutter (18) more secure.

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