A milling device for CNC equipment and CNC equipment

Abstract

This invention belongs to the field of milling technology, specifically a milling device and CNC equipment for CNC machines; it includes a housing and a milling cutter; the housing is provided with a mounting base, and the center of the mounting base is provided with a loading and unloading groove, in which a locking block for power transmission is installed; one end of the milling cutter is located in the loading and unloading groove and connected to the locking block, and the other end is used for machining the track; the mounting base is also provided with an energy-absorbing locking device; the energy-absorbing locking device includes an annular channel, which is disposed in the mounting base and the two are coaxial; a number of positioning arc plates are located in the annular channel; the positioning arc plates are provided with a braking and reverse thrust assembly; the braking and reverse thrust assembly includes a braking base plate, which is installed on both sides of the positioning arc plate; this improves the stability of the milling cutter during use, avoids damage to the milling cutter due to the reaction impact force, extends the service life of the milling cutter, and reduces the limitations of the device in use.

Description

Technical Field

[0001] This invention belongs to the field of milling technology, specifically a milling device and a CNC machine for use in CNC equipment. Background Technology

[0002] The excavator tracks are an important walking component. Their structure and function are designed to adapt to various complex terrains, providing stable support and mobility for the excavator. To ensure assembly accuracy, performance, and durability during production, the excavator tracks need to be milled during processing. This ensures the excavator's reliability and component durability under heavy loads and complex terrain.

[0003] The milling of tracks is all done by CNC equipment. CNC technology achieves high precision, complex structures and mass production requirements. Usually, the spindle drives the milling cutter to rotate at high speed, and the milling cutter makes a feed motion according to the programmed trajectory to achieve the machining of the track surface. However, during the machining process, when the high-speed rotating milling cutter comes into contact with the track, it will generate an impact force. On the one hand, it causes the workpiece to shake, and on the other hand, the impact force will react on the milling cutter. However, the existing equipment cannot mitigate the impact of this impact force on the milling cutter during use after the milling cutter is installed. As a result, the milling cutter has poor stability during use, which not only makes it easy to wear out and shortens its service life, but also increases the limitations of the equipment during use due to the poor installation effect of the milling cutter. Summary of the Invention

[0004] In view of the above situation and to overcome the defects of the prior art, the present invention provides a milling device and a CNC machine for CNC equipment, which effectively solves the problems in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a milling device for CNC equipment, comprising a housing and a milling cutter; the housing is provided with a mounting base, and a loading / unloading groove is provided at the center of the mounting base, in which a locking block for power transmission is installed; one end of the milling cutter is located in the loading / unloading groove and connected to the locking block, and the other end is used for machining the track; the mounting base is also provided with an energy-absorbing locking device, which is used to reduce the impact force on the milling cutter during use; the energy-absorbing locking device includes an annular channel, which is disposed in the mounting base, and the two are coaxial;

[0006] The movable arc plates are several in number and located within an annular channel; the movable arc plates are provided with a braking and counter-pushing assembly, which is used to prevent the impacted milling cutter from dislodging; the braking and counter-pushing assembly includes a braking base plate, which is installed on both sides of the movable arc plates.

[0007] A connecting slot is provided inside the mounting base and is used to connect the loading and unloading circular slot and the annular channel.

[0008] A rotating sleeve is fitted onto the milling cutter, and the two rotate in coordination; the rotating sleeve is located in the loading and unloading circular groove.

[0009] Preferably, it includes a movable column that is connected through the movable arc plate, and the two are in sliding fit.

[0010] A blocking arc plate is installed at one end of the movable column near the loading and unloading circular groove; the connecting slot is located at the moving path of the blocking arc plate, and the two are in contact.

[0011] The movable square column is installed on the side of the blocking arc plate near the loading and unloading circular groove; a movable square tube is slidably connected to the movable square column;

[0012] A locking clamp is installed at the end of the movable square tube away from the movable square column;

[0013] A rubber airbag is connected to the side of the locking clamp block away from the moving square tube; the outer wall of the rotating sleeve is located in the moving path of the rubber airbag.

[0014] Preferably, it includes an annular pipe installed on the outer wall of the mounting base, and the two are coaxial; the diameter of the annular pipe is larger than that of the mounting base.

[0015] An air pump is installed at the mounting base; the air pump is equipped with an active pipe that is connected to the outer wall of the annular pipe and the two are in communication.

[0016] Positioning cylinders; the number and position of the positioning cylinders correspond to the number of movable arc plates; the positioning cylinders are installed on the inner wall of the annular pipe, and the two are connected;

[0017] The positioning cylinder has one end located inside the positioning cylinder and the two are slidably fitted together, while the other end is equipped with a positioning T-plate.

[0018] A positioning spring is sleeved on a positioning cylinder; one end of the positioning spring is fixedly connected to the outer wall of the annular pipe, and the other end is fixedly connected to the positioning T-plate. The end of the spring away from the positioning cylinder passes through the outer wall of the mounting seat and is located in the loading and unloading groove, and is connected to the positioning arc plate.

[0019] Preferably, it includes a hollow tube, which is installed inside the brake base plate;

[0020] The linkage hose has one end installed on the inner wall of the annular pipe, and the other end passes through the mounting round seat and is located in the loading and unloading round groove, and is connected to the hollow pipe; the hollow pipe and the annular pipe are connected by the linkage hose.

[0021] The limiting block is fixedly installed on the outer wall of the hollow pipe.

[0022] Preferably, it includes a limiting cylinder, one end of which is located inside the hollow pipe and the two are slidably engaged; the other end is equipped with a limiting block;

[0023] A limiting spring is sleeved on a limiting cylinder; one end of the limiting spring is fixedly connected to a limiting block, and the other end is fixedly connected to a limiting block; a rubber buffer pad is installed on the limiting block, and the side of the blocking arc plate away from the milling cutter is located at the movement path of the rubber buffer pad.

[0024] A limiting circular block is installed inside a hollow pipe; the limiting circular block is also provided with a through rectangular groove.

[0025] Preferably, it includes a positioning spring located inside the positioning square tube; one end of the positioning spring is fixedly connected to the bottom surface inside the positioning square tube, and the other end is fixedly connected to the positioning square column;

[0026] A connecting hose is installed at one end inside a movable square tube and at the other end inside a rubber airbag; the movable square tube and the rubber airbag are connected by the connecting hose.

[0027] The retaining rack is installed on the side of the blocking arc plate near the moving arc plate.

[0028] Preferably, it includes two locking threaded shafts, which are symmetrically mounted on the side of the positioning arc plate;

[0029] The locking gear is mounted on the locking threaded shaft; the retaining rack is located between the two locking gears and meshes with them.

[0030] The locking cross block is threadedly connected to the locking threaded shaft; the positioning arc plate is equipped with a guide slide column, which is connected through the locking cross block, and the two are slidably engaged.

[0031] Preferably, it includes a bent long rod, one end of which is installed on the locking cross block, and the other end is installed with a locking plug; the locking plug passes through the hollow pipe and is connected to the rectangular groove.

[0032] Preferably, the annular channel is composed of two standard circles, both with a diameter larger than the loading and unloading groove; a compression spring is also fitted on the movable column, one end of which is fixedly connected to the movable arc plate, and the other end is fixedly connected to the blocking arc plate.

[0033] The present invention also provides a CNC device for use in the milling apparatus of a CNC device.

[0034] As can be seen from the above, the milling device and CNC equipment provided by the present invention have the effect of improving the stability of the milling cutter during use. It avoids the reaction force generated when the high-speed rotating milling cutter comes into contact with the track during track processing, which causes the workpiece to shake, and thus the milling cutter shakes. This reduces the impact of the impact force on the milling cutter during use after installation, thereby improving the stability of the milling cutter during use, avoiding damage to the milling cutter due to the impact force of the reaction force, and extending the service life of the milling cutter. This further enhances the installation and use effect of the milling cutter, and reduces the limitations of the device in use and milling. Attached Figure Description

[0035] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0036] In the attached diagram:

[0037] Figure 1 This is one of the overall structural schematic diagrams of the present invention;

[0038] Figure 2 This is a schematic diagram of the annular pipe structure of the present invention;

[0039] Figure 3 This is an exploded cross-sectional view of the rotating sleeve of the present invention;

[0040] Figure 4 This is a cross-sectional view of the displacement square tube of the present invention;

[0041] Figure 5 This is the second schematic diagram of the overall structure of the present invention;

[0042] Figure 6 This is a cross-sectional view of the positioning cylinder of the present invention;

[0043] Figure 7 This is a cross-sectional view of the hollow pipe of the present invention;

[0044] Figure 8 This is a schematic diagram of the air pump structure of the present invention;

[0045] Figure 9 This is a schematic diagram of the arc-blocking plate structure of the present invention;

[0046] Figure 10 This is a cross-sectional view of the annular channel of the present invention;

[0047] Figure 11 This is a cross-sectional view of the limiting circular block of the present invention;

[0048] Figure 12 This is a schematic diagram of the milling cutter structure of the present invention;

[0049] In the diagram: 1. Housing; 2. Milling cutter; 3. Mounting round seat; 4. Loading / unloading round groove; 5. Annular channel; 6. Positioning arc plate; 7. Braking base plate; 8. Connecting slot; 9. Rotating sleeve; 10. Positioning column; 11. Blocking arc plate; 12. Positioning square column; 13. Positioning square tube; 14. Locking clamp; 15. Rubber airbag; 16. Annular pipe; 17. Air pump; 18. Active pipe; 19. Positioning cylinder; 20. Positioning cylinder; 21. Positioning T-plate; 22. 23. Positioning spring; 24. Hollow pipe; 25. Linkage hose; 26. Limiting block; 27. Limiting cylinder; 28. Limiting block; 29. ​​Limiting spring; 30. Rubber buffer pad; 31. Limiting round block; 32. Rectangular groove; 33. Positioning spring; 34. Connecting hose; 35. Retaining rack; 36. Locking threaded shaft; 37. Locking gear; 38. Locking cross block; 39. Guide slide column; 40. Bending long rod; 41. Locking insert block; 42. Compression spring. Detailed Implementation

[0050] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0051] Example 1, by Figures 1 to 12 The present invention includes a housing 1 and a milling cutter 2. The housing 1 is provided with a mounting base 3, and the center of the mounting base 3 is provided with a loading and unloading groove 4, in which a locking block for power transmission is installed. One end of the milling cutter 2 is located in the loading and unloading groove 4 and connected to the locking block, and the other end is used for machining the track. The mounting base 3 is also provided with an energy-absorbing locking device, which is used to reduce the impact force on the milling cutter 2 during use. The energy-absorbing locking device includes an annular channel 5, which is disposed in the mounting base 3, and the two are coaxial.

[0052] The connecting slot 8 is located inside the mounting base 3 and is used to connect the loading and unloading circular slot 4 and the annular channel 5.

[0053] A rotating sleeve 9 is fitted onto the milling cutter 2, and the two are rotatably engaged; the rotating sleeve 9 is located within the loading and unloading circular groove 4;

[0054] The movable column 10 is connected through the movable arc plate 6, and the two are in sliding fit.

[0055] A blocking arc plate 11 is installed at one end of the movable column 10 near the loading and unloading circular groove 4; the connecting groove 8 is located at the moving path of the blocking arc plate 11, and the two are in contact.

[0056] The movable square column 12 is installed on the side of the blocking arc plate 11 near the loading and unloading circular groove 4; a movable square tube 13 is slidably connected to the movable square column 12.

[0057] The locking clamp 14 is installed at the end of the movable square tube 13 away from the movable square post 12;

[0058] A rubber airbag 15 is connected to the side of the locking clamp 14 away from the moving square tube 13; the outer wall of the rotating sleeve 9 is located in the moving path of the rubber airbag 15.

[0059] An annular pipe 16 is installed on the outer wall of the mounting base 3, and the two are coaxial; the diameter of the annular pipe 16 is larger than that of the mounting base 3.

[0060] An air pump 17 is installed at the mounting base 3; an active pipe 18 is installed on the air pump 17, which is connected to the outer wall of the annular pipe 16, and the two are connected.

[0061] Positioning cylinder 19; the number and position of the plurality of positioning cylinders 19 correspond to the plurality of movable arc plates 6; the positioning cylinders 19 are installed on the inner side wall of the annular pipe 16 and the two are connected;

[0062] The positioning cylinder 20 has one end located inside the positioning cylinder 19 and the two are slidably fitted together, while the other end is equipped with a positioning T-plate 21.

[0063] A positioning spring 22 is sleeved on a positioning cylinder 20; one end of the positioning spring 22 is fixedly connected to the outer wall of the annular pipe 16, and the other end is fixedly connected to the positioning T plate 21. The end of the spring away from the positioning cylinder 20 passes through the outer wall of the mounting seat 3 and is located in the loading and unloading groove 4, and is connected to the moving arc plate 6.

[0064] Positioning spring 32 is located inside positioning square tube 13; one end of positioning spring 32 is fixedly connected to the bottom surface of the inner side of positioning square tube 13, and the other end is fixedly connected to positioning square column 12.

[0065] A connecting hose 33 is installed at one end inside the movable square tube 13 and at the other end inside the rubber airbag 15; the movable square tube 13 and the rubber airbag 15 are connected by the connecting hose 33.

[0066] The retaining rack 34 is installed on the side of the blocking arc plate 11 near the moving arc plate 6;

[0067] The annular channel 5 is composed of two standard circles, both of which have a diameter larger than the loading and unloading circular groove 4; a compression spring 41 is also fitted on the movable column 10, one end of the compression spring 41 is fixedly connected to the movable arc plate 6, and the other end is fixedly connected to the blocking arc plate 11.

[0068] When the device mills the track, the milling cutter 2 is installed in the loading / unloading groove 4, and the milling cutter 2 is fixedly connected to the mounting base 3 by several locking blocks 14 on the energy-absorbing locking device contacting the rotating sleeve 9, thus completing the installation operation of the milling cutter 2. At the same time, the milling cutter 2 at the rotating sleeve 9 is installed at the clamping block, and the rotation of the clamping block can drive the milling cutter 2 to rotate quickly for milling the track. The specific operation steps are as follows: by starting the air pump 17, the generated gas is sent into the annular pipe 16 through the active pipe 18, which then enters several positioning cylinders 19 and acts on the positioning cylinder 20, thus pushing it to move. This causes the positioning cylinder 20 to move limited at the positioning cylinder 19, so that the positioning spring 22 is in a buffer state, thereby driving the positioning T plate 21 to move. This causes the movable arc plate 6 to move within the annular channel 5, thus moving closer to the milling cutter 2. Under the action of the movable column 10, the blocking arc plate 11, the movable square column 12, and the movable square tube 13, the movable arc plate 6 drives the locking clamping blocks 14 to move. As the locking clamping blocks 14 pass through the connecting slot 8, they all move closer to the milling cutter 2 and contact the side wall of the rotating sleeve 9 on the milling cutter 2. This allows the milling cutter 2 to be clamped without affecting its rotation. This also allows the locking clamping blocks 14 to move closer to and contact the rotating sleeve 9, thus limiting its movement and preventing the milling cutter 2 from dislodging during use. Furthermore, the clamping of the milling cutter 2 by the locking clamping blocks 14 is self-centering, preventing the milling cutter 2 from being not clamped at the center and affecting the processing effect, thereby reducing the limitations of the device during use.

[0069] When the locking clamping block 14 can no longer move after contacting the rotating sleeve 9, the continuous output of the air pump 17 causes the positioning T-plate 21 to continue moving, which in turn drives the positioning arc plate 6 on the positioning T-plate 21 to continue moving. It is worth mentioning that because the strength of the compression spring 41 is greater than that of the positioning spring 32, the continuing to move positioning arc plate 6, under the action of the positioning column 10 and the positioning spring 32, will drive the blocking arc plate 11 to continue moving, causing the positioning square column 12 on it to move within the positioning square cylinder 13. This keeps the positioning spring 22 in a buffer state, allowing it to continuously apply pressure to the locking clamping block 14, causing several locking clamping blocks 14 to move. 4. The increased friction and strength between the contacting sleeve 9 and the milling cutter 2 further enhances the clamping and installation effect, preventing dislocation and instability due to excessive impact during use, thus improving the overall performance of the device. Simultaneously, when the positioning column 12 moves within the positioning cylinder 13, it compresses the space inside the cylinder, allowing gas to enter the rubber air bladder 15 through the connecting hose 33. When the locking block 14 clamps and installs the milling cutter 2, the rubber air bladder 15 on the locking block 14 contacts the side wall of the rotating sleeve 9 on the milling cutter 2, thereby improving the contact between the locking block 14 and the rotating sleeve 9. The friction force is reduced to prevent the clamped end mill 2 from dislodging during use, thus improving the safety of the end mill 2 after installation. Simultaneously, the gas entering the rubber air bladder 15 causes it to expand, further compressing the gap between the locking block 14 and the rotating sleeve 9, preventing the gap from being too large or affecting the stability of the end mill 2 during use. The expanded rubber air bladder 15 also provides some cushioning; when the end mill 2 becomes unstable and shakes during use, the cushioning performance provided by the expanded rubber air bladder 15 and the compression spring 41 offsets the impact on the end mill 2 during use. The impact force generated by the shaking improves the stability of the milling cutter 2 during use. It avoids the reaction force generated when the high-speed rotating milling cutter 2 comes into contact with the track during track machining, which would cause the workpiece to shake. This reduces the impact force on the milling cutter 2 after installation, thereby improving its stability during use, preventing damage from the reaction force, and extending its service life. This further enhances the installation and use effect of the milling cutter 2, reducing the limitations of the device in use and milling.

[0070] In this embodiment, there are several movable arc plates 6 located within the annular channel 5; the movable arc plate 6 is provided with a braking and reverse thrust assembly, which is used to prevent the impacted milling cutter 2 from dislodging; the braking and reverse thrust assembly includes a braking base plate 7, which is installed on both sides of the movable arc plate 6.

[0071] Hollow tube 23 is installed inside brake base plate 7;

[0072] The linkage hose 24 has one end installed on the inner wall of the annular pipe 16, and the other end passes through the mounting round seat 3 and is located in the loading and unloading round groove 4, and is connected to the hollow pipe 23; the hollow pipe 23 and the annular pipe 16 are connected by the linkage hose 24.

[0073] The limiting block 25 is fixedly installed on the outer wall of the hollow pipe 23;

[0074] A limiting cylinder 26 has one end located inside a hollow pipe 23, and the two are in sliding fit; a limiting block 27 is installed at the other end.

[0075] A limiting spring 28 is sleeved on a limiting cylinder 26; one end of the limiting spring 28 is fixedly connected to a limiting block 25, and the other end is fixedly connected to a limiting block 27; a rubber buffer pad 29 is installed on the limiting block 27, and the side of the blocking arc plate 11 away from the milling cutter 2 is located at the moving path of the rubber buffer pad 29.

[0076] A limiting circular block 30 is installed inside the hollow pipe 23; the limiting circular block 30 is also provided with a through rectangular groove 31;

[0077] Two locking threaded shafts 35 are symmetrically mounted on the side of the positioning arc plate 6;

[0078] The locking gear 36 is mounted on the locking threaded shaft 35; the retaining rack 34 is located between the two locking gears 36 and meshes with each other;

[0079] The locking horizontal block 37 is threadedly connected to the locking threaded shaft 35; the movable arc plate 6 is equipped with a guide slide 38, which is connected through the locking horizontal block 37 and the two are slidably engaged.

[0080] A bent long rod 39 is installed at one end on a locking cross block 37 and at the other end on a locking plug 40; the locking plug 40 passes through a hollow pipe 23 and is connected to a rectangular groove 31.

[0081] When the energy-absorbing locking device clamps the milling cutter 2, the movement of the positioning T-plate 21 only causes the displacement spring 32 to deform, which is used to improve the contact and clamping strength between the locking block 14 and the rotating sleeve 9. At the same time, the compression spring 41, which has a higher strength than the displacement spring 32, does not deform under the operation of the energy-absorbing locking device. Since the displacement spring 32 is already in its maximum deformation state when the milling cutter 2 is in use, and the clamping of the milling cutter 2 is carried out by several locking blocks 14, when the milling cutter 2 generates an impact force on the track during use, it causes the workpiece to shake. The shaking workpiece will reflect the impact force onto the milling cutter 2 used for operation, causing it to vibrate and deviate. Several locking blocks 14 are distributed around the milling cutter 2, which means that the milling cutter 2 can be deviated regardless of the direction it is facing. Any deviation in either direction will cause the contacting locking block 14 to move, which, under the action of the positioning square tube 13, the positioning square column 12, and the positioning spring 32, will cause the blocking arc plate 11 to move. Since the positioning arc plate 6 is also limited to its current position by the positioning T plate 21 and cannot move, the distance between the positioning arc plate 6 and the blocking arc plate 11 becomes smaller, causing the positioning column 10 on the blocking arc plate 11 to move at the positioning arc plate 6, so that the compression spring 41 is in a buffer state. The buffering performance provided by the compression spring 41 can offset the impact energy received by the milling cutter 2 during use, avoiding damage to the milling cutter 2 and the device caused by the impact force, thereby improving the service life of the milling cutter 2 and the use effect of the device, while also allowing the moving positioning arc plate to move. The retaining rack 34 on the 6 moves and meshes with the two locking gears 36, causing the locking threaded shaft 35 on it to rotate. This allows the threaded locking block 37 to move at the guide slide 38, which in turn moves the locking insert 40 via the bent long rod 39, disengaging it from the rectangular slot 31. This releases the limiting state within the hollow pipe 23, allowing the air head in the annular pipe 16 to enter the hollow pipe 23 through the linkage hose 24 and act on the limiting cylinder 26, limiting its movement within the hollow pipe 23. This puts the limiting spring 28 in a buffer state, allowing the limiting block 25 on the limiting cylinder 26 to move towards and contact the blocking arc plate 11, thus limiting the movement of the blocking arc plate 11. To prevent excessive movement of the blocking arc plate 11, which could weaken the connection between the locking block 14 and the milling cutter 2, the device can deflect the impacted milling cutter 2 while preventing it from dislodging. This reduces the limitations of the device during use and further improves the performance of the milling cutter 2 after installation. It is worth mentioning that the buffering performance provided by the rubber buffer pad 29 further reduces the impact force when the limiting block 27 contacts the blocking arc plate 11, thereby further eliminating the impact force caused by the milling cutter 2 on the blocking arc plate 11. At the same time, it increases the friction force between the limiting block 27 and the blocking arc plate 11, preventing dislodging when they contact each other, thus improving the stability of the device during use.

[0082] This embodiment also provides a CNC machine, which includes the milling device used in the above embodiment for CNC machines.

[0083] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0084] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A milling device for CNC equipment, comprising a housing and a milling cutter; characterized in that: The housing is provided with a mounting base, and a loading and unloading groove is provided at the center of the mounting base, in which a locking block for power transmission is installed; one end of the milling cutter is located in the loading and unloading groove and connected to the locking block, and the other end is used for machining the track; the mounting base is also provided with an energy-absorbing locking device, which is used to reduce the impact force on the milling cutter during use; the energy-absorbing locking device includes an annular channel, which is disposed in the mounting base, and the two are coaxial; The movable arc plates are several in number and located within an annular channel; the movable arc plates are provided with a braking and counter-pushing assembly, which is used to prevent the impacted milling cutter from dislodging; the braking and counter-pushing assembly includes a braking base plate, which is installed on both sides of the movable arc plates. A connecting slot is provided inside the mounting base and is used to connect the loading and unloading circular slot and the annular channel. A rotating sleeve is fitted onto the milling cutter, and the two are rotatably engaged; the rotating sleeve is located within the loading and unloading circular groove; A hollow tube, which is installed inside the brake base plate; The linkage hose has one end installed on the inner wall of the annular pipe, and the other end passes through the mounting round seat and is located in the loading and unloading round groove, and is connected to the hollow pipe; the hollow pipe and the annular pipe are connected by the linkage hose. The limiting block is fixedly installed on the outer wall of the hollow pipe. A limiting cylinder, one end of which is located inside a hollow pipe and the two are in sliding fit; a limiting block is installed at the other end. A limiting spring is sleeved on a limiting cylinder; one end of the limiting spring is fixedly connected to a limiting block, and the other end is fixedly connected to a limiting block; a rubber buffer pad is installed on the limiting block, and the side of the blocking arc plate away from the milling cutter is located at the movement path of the rubber buffer pad. A limiting circular block is installed inside a hollow pipe; the limiting circular block is also provided with a through rectangular groove; Two locking threaded shafts are symmetrically mounted on the side of the positioning arc plate; The locking gear is mounted on the locking threaded shaft; the retaining rack is located between the two locking gears and meshes with them. A locking cross block is threadedly connected to a locking threaded shaft; a guide slide is installed on the positioning arc plate, which is connected through the locking cross block, and the two are slidably engaged. A bent long rod is installed at one end on a locking cross block and at the other end on a locking plug; the locking plug passes through a hollow pipe and is connected to a rectangular groove.

2. A milling device for CNC equipment according to claim 1, characterized in that: It includes a movable column, which is connected through the movable arc plate, and the two are in sliding fit; A blocking arc plate is installed at one end of the movable column near the loading and unloading circular groove; the connecting slot is located at the moving path of the blocking arc plate, and the two are in contact. The movable square column is installed on the side of the blocking arc plate near the loading and unloading circular groove; a movable square tube is slidably connected to the movable square column; A locking clamp is installed at the end of the movable square tube away from the movable square column; A rubber airbag is connected to the side of the locking clamp block away from the moving square tube; the outer wall of the rotating sleeve is located in the moving path of the rubber airbag.

3. A milling device for CNC equipment according to claim 2, characterized in that: It includes an annular pipe installed on the outer wall of the mounting base, with both having coaxial centers; the diameter of the annular pipe is larger than that of the mounting base. An air pump is installed at the mounting base; the air pump is equipped with an active pipe that is connected to the outer wall of the annular pipe and the two are in communication. Positioning cylinders; the number and position of the positioning cylinders correspond to the number of movable arc plates; the positioning cylinders are installed on the inner wall of the annular pipe, and the two are connected; The positioning cylinder has one end located inside the positioning cylinder and the two are slidably fitted together, while the other end is equipped with a positioning T-plate. A positioning spring is sleeved on a positioning cylinder; one end of the positioning spring is fixedly connected to the outer wall of the annular pipe, and the other end is fixedly connected to the positioning T-plate. The end of the spring away from the positioning cylinder passes through the outer wall of the mounting seat and is located in the loading and unloading groove, and is connected to the positioning arc plate.

4. A milling device for CNC equipment according to claim 2, characterized in that: Includes a positioning spring, which is located inside the positioning square tube; one end of the positioning spring is fixedly connected to the bottom surface inside the positioning square tube, and the other end is fixedly connected to the positioning square column; A connecting hose is installed at one end inside a movable square tube and at the other end inside a rubber airbag; the movable square tube and the rubber airbag are connected by the connecting hose. The retaining rack is installed on the side of the blocking arc plate near the moving arc plate.

5. A milling device for CNC equipment according to claim 2, characterized in that: The annular channel is composed of two standard circles, both with a diameter larger than the loading and unloading groove; a compression spring is also fitted on the movable column, with one end of the compression spring fixedly connected to the movable arc plate and the other end fixedly connected to the blocking arc plate.

6. A numerical control device, characterized in that: The CNC equipment includes a milling device for CNC equipment as described in any one of claims 1-5.

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