A multi-spindle drilling and milling CNC machine tool

Abstract

The present invention discloses a multi-spindle drilling and milling CNC machine tool, comprising a processing seat, a processing table, a high-efficiency switching mechanism for cutting drill bits, a third driving motor, a mounting top plate and a drilling and milling assembly, wherein a rotating sleeve is rotatably clamped on the inner wall of a support table, a plurality of assembly sleeves are slidably penetrated through the outer wall of the rotating sleeve in a circular array, a reset assembly is arranged between the outer wall of the assembly sleeve and the rotating sleeve, and the reset assembly is connected through the reset assembly, a driving assembly is mounted on the support table and connected to the rotating sleeve, one end of the third driving motor is fixedly connected to the inner top of the processing seat, the top of the mounting top plate is fixedly connected to the output end of the third driving motor, and the drilling and milling assembly is mounted on the bottom of the mounting top plate. Thus, various drill bits can be effectively arranged and accessed in a fixed plane, the density of tool storage is increased, and the speed and reliability of the tool changing process can be improved by using an electromagnet to adsorb and release the tool.

Description

Technical Field

[0001] The invention relates to the technical field of drilling and milling machine tools, and in particular to a multi-spindle drilling and milling numerically controlled machine tool. Background Art

[0002] In traditional multi-spindle drilling and milling CNC machine tools, the design and implementation of the drill bit changing system plays a vital role in improving production efficiency and machining accuracy. These systems often use a robotic arm or slide mechanism to automatically change the drill bit to meet different machining requirements. The core of the drill bit changing system includes a fixed or movable drill bit library and a series of drive and control devices that work together to select and replace the appropriate drill bit.

[0003] However, although these traditional drill bit changing systems can meet production needs to a certain extent, they also have some obvious disadvantages. First, the robotic arm and slide mechanism often take up a large space, which not only limits the flexibility of the machine tool layout, but also may lead to reduced operating efficiency within the limited production space. Secondly, the mechanical complexity of these systems may lead to increased maintenance costs and increased system failure rates, thus affecting the overall production stability and efficiency. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, the purpose of the present invention is to propose a multi-spindle drilling and milling CNC machine tool, which can solve the problem that the traditional drill bit changing system mechanical arm and slide rail mechanism often occupy a large space, which not only limits the flexibility of the machine tool layout, but also may lead to a decrease in operating efficiency within a limited production space. Secondly, the mechanical complexity of these systems may lead to an increase in maintenance costs and an increase in the system failure rate, thereby affecting the overall production stability and efficiency.

[0006] To achieve the above-mentioned purpose, the present invention proposes a multi-spindle drilling and milling CNC machine tool, comprising a processing seat, a processing table, a high-efficiency switching mechanism for a drill bit, a third driving motor, a mounting top plate and a drilling and milling assembly, wherein the processing table is fixedly connected to the inner bottom of the processing seat, and the high-efficiency switching mechanism for a drill bit comprises a first cylinder, a first magnetic suction head, an assembly sleeve, a reset assembly, a support table, a rotating sleeve and a driving assembly, wherein two first cylinders are provided, which are respectively installed on both sides of the outer wall of the processing seat, the output end of the first cylinder passes through the outer wall of the processing seat and is fixedly connected to one end of the first magnetic suction head, the support table is fixedly connected to the inner wall of the processing seat, the rotating sleeve is rotatably clamped on the inner wall of the support table, a plurality of assembly sleeves slide in a circular array through the outer wall of the rotating sleeve, the reset assembly is provided between the outer wall of the assembly sleeve and the rotating sleeve, and is connected through the reset assembly, the driving assembly is installed on the support table and is connected to the rotating sleeve The rotating sleeve plate is connected, one end of the third drive motor is fixedly connected to the inner top of the processing seat, the top of the mounting top plate is fixedly connected to the output end of the third drive motor, the drilling and milling assembly is installed at the bottom of the mounting top plate, the reset assembly includes a fixed sleeve plate, a support spring and a support head, wherein the fixed sleeve plate is fixedly sleeved on the outer wall of the assembly sleeve plate, the support head is fixedly connected to the outer wall of the rotating sleeve plate and is located on both sides of the assembly sleeve plate, the support spring is arranged between the fixed sleeve plate and the support head, and is connected through the support spring, the drive assembly includes a first drive motor, a main gear and a driven gear, wherein the first drive motor is installed on the inner top of the processing seat, the main gear is rotatably connected to the top of the support platform, a plurality of driven teeth are fixedly connected to the outer wall of the rotating sleeve plate in a circular array, and the main gear is meshed with the driven gear, and the output end of the first drive motor is fixedly connected to the top of the main gear.

[0007] The multi-spindle drilling and milling CNC machine tool of the present invention drives the rotating sleeve plate to rotate through the driving component, rotates the assembly sleeve plate used to place the drill bit to a suitable position, and then starts one of the first cylinders to drive the first magnetic suction head to fit with the end of the assembly sleeve plate, and pushes the installation groove starting from the end of the assembly sleeve plate to be sleeved on the drill bit. Since the second magnetic suction head is installed inside the assembly sleeve plate, the drill bit is adsorbed to the inside of the assembly sleeve plate through the second magnetic suction head, and the second magnetic suction head can be adsorbed to the inner wall end of the assembly sleeve plate under the action of the first magnetic suction head, thereby completing the recovery of the drill rod, and another magnetic suction head needs to be replaced. When drilling the rod, move another assembly plate to the corresponding position, and then start another first cylinder to drive another first magnetic head to contact the end of the assembly plate, and this first magnetic head is opposite to the second magnetic head inside the assembly plate, so that the second magnetic head can push the drill bit that needs to be replaced into the drilling and milling assembly, thereby completing the replacement of the drill bit, thereby improving the tool change efficiency and accuracy. At the same time, various drill bits can be effectively arranged and accessed in a fixed plane, increasing the density of tool storage, and by using electromagnets to adsorb and release the tools, the speed and reliability of the tool change process can be improved.

[0008] In addition, the multi-spindle drilling and milling CNC machine tool proposed in the present invention may also have the following additional technical features:

[0009] Specifically, the drilling and milling assembly includes a second cylinder, a connecting plate, a supporting sleeve, a supporting side plate, a second driving motor, a rotating arm, an adsorption sleeve and an electromagnet, wherein the second cylinder is installed at the bottom of the mounting top plate, the top of the connecting plate is fixedly connected to the output end of the second cylinder, one end of the supporting sleeve is fixedly connected to the bottom of the connecting plate, the supporting side plate is fixedly connected to the outer wall of the supporting sleeve, the second driving motor is installed on the outer wall of the supporting side plate, the rotating arm is rotatably connected to the inner wall of the supporting sleeve, one end of the rotating arm is fixedly connected to the output end of the second driving motor, one end of the adsorption sleeve is fixedly sleeved on the outer wall of the rotating arm, and the electromagnet is installed on the inner top of the adsorption sleeve.

[0010] Specifically, a mounting groove is provided at the end of the assembly plate, and a second magnetic suction head is slidably mounted at the inner end of the mounting groove.

[0011] Specifically, one end of the two first magnetic heads close to the rotating sleeve plate is a south pole and a north pole respectively.

[0012] Specifically, a multi-spindle operating table is installed on the top of the processing table.

[0013] Specifically, the adsorption sleeve plate moves up and down in a vertical direction of the center position of the rotating sleeve plate.

[0014] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0016] Figure 1 The overall structure of the present invention is shown in FIG. Figure 1 ;

[0017] Figure 2 The overall structure of the present invention is shown in FIG. Figure 2 ;

[0018] Figure 3 It is a structural schematic diagram of the support platform of the present invention;

[0019] Figure 4 It is a structural schematic diagram of the rotating sleeve plate of the present invention;

[0020] Figure 5 For the present invention Figure 4 A schematic diagram of the structure with a partial enlargement at the center;

[0021] Figure 6 The structure of the drilling and milling assembly of the present invention is shown in FIG. Figure 1 ;

[0022] Figure 7 The structure of the drilling and milling assembly of the present invention is shown in FIG. Figure 2 ;

[0023] Figure 8 This is a schematic diagram of the structure inside the practical adsorption sleeve;

[0024] Fig. 9 It is a schematic structural diagram of the second magnetic suction head of the present invention.

[0025] As shown in the figure:

[0026] 1. Processing seat; 2. Processing table; 21. Multi-spindle operating table; 3. High-efficiency switching mechanism for cutting drill bits; 31. First cylinder; 32. First magnetic suction head; 33. Assembly sleeve; 331. Mounting slot; 332. Second magnetic suction head; 34. Reset assembly; 341. Fixed sleeve; 342. Support spring; 343. Support head; 35. Support table; 36. Rotating sleeve; 37. Drive assembly; 371. First drive motor; 372. Main gear; 373. Driven gear; 4. Third drive motor; 5. Install top plate; 6. Drilling and milling assembly; 61. Second cylinder; 62. Connecting plate; 63. Support sleeve; 64. Support side plate; 65. Second drive motor; 66. Rotating arm; 67. Adsorption sleeve; 68. Electromagnet. DETAILED DESCRIPTION

[0027] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limitations of the present invention. On the contrary, embodiments of the present invention include all changes, modifications and equivalents that fall within the spirit and connotation of the appended claims.

[0028] The multi-spindle drilling and milling CNC machine tool according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0029] like Figure 1-Figure 9 As shown, the multi-spindle drilling and milling CNC machine tool of the embodiment of the present invention may include a processing seat 1, a processing table 2, a drill bit efficient switching mechanism 3, a third drive motor 4, a mounting top plate 5 and a drilling and milling assembly 6.

[0030] The processing table 2 is fixedly connected to the inner bottom of the processing seat 1 .

[0031] Furthermore, if Figure 1 As shown, a multi-spindle operating table 21 is installed on the top of the processing table 2.

[0032] It should be noted that the multi-spindle operating table 21 described in this embodiment has three motion axes: X, Y, and Z axes to achieve multi-directional positioning and processing.

[0033] The drill bit efficient switching mechanism 3 comprises a first cylinder 31 , a first magnetic suction head 32 , an assembly sleeve 33 , a reset assembly 34 , a support platform 35 , a rotating sleeve 36 and a driving assembly 37 .

[0034] There are two first cylinders 31 , which are respectively installed on both sides of the outer wall of the processing seat 1 . The output end of the first cylinder 31 passes through the outer wall of the processing seat 1 and is fixedly connected to one end of the first magnetic suction head 32 .

[0035] Furthermore, if Figure 1 As shown, one end of the two first magnetic heads 32 close to the rotating sleeve plate 36 is a south pole and a north pole respectively.

[0036] It should be noted that the outer wall of the processing seat 1 described in this embodiment is symmetrically fixedly connected to the mounting plates on both sides, and the first cylinder 31 is fixedly connected to the mounting plates.

[0037] The support platform 35 is fixedly connected to the inner wall of the processing seat 1 , the rotating sleeve plate 36 is rotatably clamped on the inner wall of the support platform 35 , and a plurality of assembly sleeve plates 33 slide through the outer wall of the rotating sleeve plate 36 in a circular array.

[0038] Furthermore, if Fig. 9 As shown, a mounting groove 331 is formed at the end of the mounting plate 33 , and a second magnetic head 332 is slidably mounted at the inner end of the mounting groove 331 .

[0039] It should be noted that the upper and lower sides of the end of the support platform 35 described in this embodiment are symmetrically fixedly connected with mounting plates, and bolts are threaded on the mounting plates, so that the support platform 35 can be conveniently fixedly connected to the inner wall of the processing seat 1. At the same time, a rotating groove begins to be provided at the middle end of the support platform 35, and the rotating sleeve 36 is rotatably connected to the inner wall of the rotating groove.

[0040] A reset assembly 34 is provided between the outer wall of the assembly sleeve 33 and the rotating sleeve 36 , and they are connected through the reset assembly 34 . The driving assembly 37 is installed on the support platform 35 and connected to the rotating sleeve 36 .

[0041] It should be noted that, in the embodiment described, the driving assembly 37 can drive the rotating sleeve 36 to rotate on the inner wall of the support platform 35 , and the resetting assembly 34 can quickly reset the position of the assembly sleeve 33 .

[0042] One end of the third drive motor 4 is fixedly connected to the inner top of the processing seat 1 , the top of the mounting top plate 5 is fixedly connected to the output end of the third drive motor 4 , and the drilling and milling assembly 6 is installed at the bottom of the mounting top plate 5 .

[0043] It should be noted that the drilling and milling assembly 6 described in this embodiment is entirely located at the center of the rotating sleeve plate 36 and moves up and down in a direction perpendicular to the center of the circle.

[0044] Specifically, when drilling and milling the workpiece, the workpiece is first placed on the multi-spindle operating table 21 to facilitate multi-angle processing of the workpiece. In the process of processing, in order to conveniently replace the drilling and milling drill bits, two first cylinders 31 are provided, which are respectively installed on both sides of the outer wall of the processing seat 1. The output end of the first cylinder 31 passes through the outer wall of the processing seat 1 and is fixedly connected to one end of the first magnetic head 32. The support table 35 is fixedly connected to the inner wall of the processing seat 1, and the rotating sleeve plate 36 is rotatably clamped on the inner wall of the support table 35. A plurality of assembly sleeves 33 slide in a circular array through the outer wall of the rotating sleeve plate 36. The outer wall of the assembly sleeve plate 33 and the rotating sleeve plate 36 are connected. A reset component 34 is provided between them, and they are connected through the reset component 34. The driving component 37 is installed on the support table 35 and is connected to the rotating sleeve plate 36. One end of the third driving motor 4 is fixedly connected to the inner top of the processing seat 1, and the top of the mounting top plate 5 is fixedly connected to the output end of the third driving motor 4. The drilling and milling component 6 is installed at the bottom of the mounting top plate 5, and then the drilling and milling component 6 is used to conveniently drill and mill the workpiece. When the drill bit needs to be replaced, the drilling and milling component 6 can drive the drill bit to move to the inside of the rotating sleeve plate 36, and then the drill bit and the rotating sleeve plate 36 are vertically formed through the drilling and milling component 6, and then the rotating sleeve is driven by the driving component 37. The plate 36 rotates to rotate the assembly plate 33 for placing the drill bit to a suitable position, and then one of the first cylinders 31 is started to drive the first magnetic head 32 to fit with the end of the assembly plate 33, and push the mounting groove 331 starting from the end of the assembly plate 33 to be sleeved on the drill bit. Since the second magnetic head 332 is installed inside the assembly plate 33, the drill bit is adsorbed to the inside of the assembly plate 33 by the second magnetic head 332, and the second magnetic head 332 can be adsorbed on the inner wall end of the assembly plate 33 under the action of the first magnetic head 32, thereby completing the recovery of the drill rod. When another drill rod is to be replaced, the other assembly plate 33 is moved to the assembly plate 33. The matching plate 33 moves to the corresponding position, and then by starting another first cylinder 31, another first magnetic head 32 is driven to abut against the end of the assembly matching plate 33, and this first magnetic head 32 is opposite to the second magnetic head 332 inside the assembly matching plate 33, so that the second magnetic head 332 can push the drill bit that needs to be replaced into the drilling and milling assembly 6, thereby completing the replacement of the drill bit, thereby improving the tool changing efficiency and accuracy, and at the same time, various drill bits can be effectively arranged and accessed in a fixed plane, increasing the density of tool storage, and by using an electromagnet 68 to adsorb and release the tool, the speed and reliability of the tool changing process can be improved.

[0045] In one embodiment of the present invention, Figure 1-Figure 9As shown, the reset assembly 34 includes a fixed sleeve 341, a support spring 342 and a support head 343, wherein the fixed sleeve 341 is fixedly sleeved on the outer wall of the assembly sleeve 33, the support head 343 is fixedly connected to the outer wall of the rotating sleeve 36 and is located on both sides of the assembly sleeve 33, and a support spring 342 is arranged between the fixed sleeve 341 and the support head 343, and they are connected through the support spring 342.

[0046] It should be noted that the outer wall of the assembly plate 33 described in this embodiment can be slidably engaged with the inner wall of the support head 343 .

[0047] Specifically, when the first cylinder 31 drives the first magnetic head 32 to push the assembly plate 33, the assembly plate 33 will be squeezed. When the first cylinder 31 is retracted, because the fixed sleeve 341 is fixedly sleeved on the outer wall of the assembly plate 33, the support head 343 is fixedly connected to the outer wall of the rotating sleeve 36 and is located on both sides of the assembly plate 33. A support spring 342 is provided between the fixed sleeve 341 and the support head 343, and they are connected by the support spring 342. Then, under the action of the support spring 342, the assembly plate 33 can be easily reset, thereby improving the efficiency of the operation.

[0048] In one embodiment of the present invention, Figure 1-Figure 9 As shown, the driving assembly 37 includes a first driving motor 371, a main gear 372 and a driven gear 373, wherein the first driving motor 371 is installed on the inner top of the processing seat 1, the main gear 372 is rotatably connected to the top of the support platform 35, and a plurality of driven teeth 373 are fixedly connected to the outer wall of the rotating sleeve plate 36 in a circular array, and the main gear 372 is meshedly connected with the driven gear 373, and the output end of the first driving motor 371 is fixedly connected to the top of the main gear 372.

[0049] It should be noted that a card slot begins at the top of the support platform 35 described in this embodiment, and a card plate matching the card slot is fixedly connected to the bottom of the main gear 372. At the same time, a drive rod is fixedly connected to the output end of the first drive motor 371, and the end of the drive rod is fixedly connected to the top of the main gear 372.

[0050] Specifically, in order to be able to conveniently adjust the positions of different assembly sets 33, thereby realizing the recovery and assembly of the drill bit, the first drive motor 371 is installed on the inner top of the processing seat 1, the main gear 372 is rotatably connected to the top of the support platform 35, and a plurality of driven teeth 373 are fixedly connected to the outer wall of the rotating sleeve 36 in a circular array, and the main gear 372 is meshingly connected with the driven gear 373. The output end of the first drive motor 371 is fixedly connected to the top of the main gear 372, and then by starting the first drive motor 371, it drives the main gear 372 to rotate, and through the meshing connection between the main gear 372 and the driven gear 373, the rotating sleeve 36 is driven to rotate on the inner wall of the support platform 35, thereby making the recovery and replacement of the drill bit more convenient.

[0051] In one embodiment of the present invention, Figure 1-Figure 9 As shown, the drilling and milling assembly 6 includes a second cylinder 61, a connecting plate 62, a supporting sleeve 63, a supporting side plate 64, a second driving motor 65, a rotating arm 66, an adsorption sleeve 67 and an electromagnet 68, wherein the second cylinder 61 is installed at the bottom of the mounting top plate 5, the top of the connecting plate 62 is fixedly connected to the output end of the second cylinder 61, one end of the supporting sleeve 63 is fixedly connected to the bottom of the connecting plate 62, the supporting side plate 64 is fixedly connected to the outer wall of the supporting sleeve 63, the second driving motor 65 is installed on the outer wall of the supporting side plate 64, the rotating arm 66 is rotatably connected to the inner wall of the supporting sleeve 63, one end of the rotating arm 66 is fixedly connected to the output end of the second driving motor 65, one end of the adsorption sleeve 67 is fixedly sleeved on the outer wall of the rotating arm 66, and the electromagnet 68 is installed on the inner top of the adsorption sleeve 67.

[0052] Furthermore, if Figure 1 As shown, the adsorption sleeve plate 67 moves up and down in a vertical direction at the center of the rotating sleeve plate 36.

[0053] It should be noted that one end of the rotating arm 66 described in this embodiment is located inside the supporting sleeve 63 .

[0054] Specifically, in order to improve the efficiency of drill bit replacement, the second cylinder 61 is installed at the bottom of the installation top plate 5, the top of the connecting plate 62 is fixedly connected to the output end of the second cylinder 61, one end of the support sleeve 63 is fixedly connected to the bottom of the connecting plate 62, the supporting side plate 64 is fixedly connected to the outer wall of the supporting sleeve 63, the second drive motor 65 is installed on the outer wall of the supporting side plate 64, the rotating arm 66 is rotatably connected to the inner wall of the supporting sleeve 63, one end of the rotating arm 66 is fixedly connected to the output end of the second drive motor 65, one end of the adsorption sleeve 67 is fixedly sleeved on the outer wall of the rotating arm 66, and the electromagnet 68 is installed on the inner top of the adsorption sleeve 67, thereby starting the second The driving motor 65 drives the end of the adsorption sleeve 67 to be placed at the opening of the assembly sleeve 33, and then the first cylinder 31 drives the mounting groove 331 opened at the end of the assembly sleeve 33 to gradually approach the adsorption sleeve 67. Since the adsorption sleeve 67 is equipped with an electromagnet 68, after power is turned on, the electromagnet 68 can suck the drill bit into the adsorption sleeve 67, thereby completing the replacement of the drill bit. When the drill bit needs to be recovered, it is necessary to start another first cylinder 31 to drive the first magnetic suction head 32 to gradually approach the end of the assembly sleeve 33, and cut off the power to the electromagnet 68, so that under the action of the first magnetic suction head 32, the drill bit is sucked into the interior of the assembly sleeve 33.

[0055] It should be understood that the adsorption sleeve 67 moves up and down in a vertical direction relative to the center of the rotating sleeve 36 .

[0056] In summary, the multi-spindle drilling and milling CNC machine tool of the embodiment of the present invention drives the rotating sleeve 36 to rotate through the driving component 37, rotates the assembly sleeve 33 used to place the drill bit to a suitable position, and then starts one of the first cylinders 31 to drive the first magnetic suction head 32 to fit with the end of the assembly sleeve 33, and pushes the installation groove 331 starting from the end of the assembly sleeve 33 to be sleeved on the drill bit. Since the second magnetic suction head 332 is installed inside the assembly sleeve 33, the drill bit is adsorbed to the inside of the assembly sleeve 33 through the second magnetic suction head 332, and under the action of the first magnetic suction head 32, the second magnetic suction head 332 can be adsorbed on the inner wall end of the assembly sleeve 33, thereby completing the drilling of the drill rod. When another drill rod is to be recovered and another assembly plate 33 is to be replaced, another assembly plate 33 is moved to the corresponding position, and then another first cylinder 31 is started to drive another first magnetic head 32 to abut against the end of the assembly plate 33, and this first magnetic head 32 is opposite to the second magnetic head 332 inside the assembly plate 33, so that the second magnetic head 332 can push the drill bit to be replaced into the drilling and milling assembly 6, thereby completing the replacement of the drill bit, thereby improving the tool changing efficiency and accuracy, and at the same time, various drill bits can be effectively arranged and accessed in a fixed plane, increasing the density of tool storage, and by using the electromagnet 68 to adsorb and release the tool, the speed and reliability of the tool changing process can be improved.

[0057] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0058] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0059] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and deform the above embodiments within the scope of the present invention.

Claims

1. A multi-spindle drilling and milling CNC machine tool, characterized in that: It comprises a processing seat (1), a processing table (2), a cutting drill bit efficient switching mechanism (3), a third driving motor (4), a mounting top plate (5) and a drilling and milling assembly (6), wherein: The processing table (2) is fixedly connected to the inner bottom of the processing seat (1); The drill bit efficient switching mechanism (3) comprises a first cylinder (31), a first magnetic suction head (32), an assembly sleeve (33), a reset assembly (34), a support platform (35), a rotating sleeve (36) and a driving assembly (37), wherein: Two first cylinders (31) are provided, which are respectively installed on both sides of the outer wall of the processing seat (1); the output end of the first cylinder (31) passes through the outer wall of the processing seat (1) and is fixedly connected to one end of the first magnetic suction head (32); The support platform (35) is fixedly connected to the inner wall of the processing seat (1), the rotating sleeve (36) is rotatably clamped on the inner wall of the support platform (35), and a plurality of the assembly sleeves (33) are slidably connected to the outer wall of the rotating sleeve (36) in a circular array; The reset component (34) is disposed between the outer wall of the assembly sleeve (33) and the rotating sleeve (36), and is connected via the reset component (34); the drive component (37) is mounted on the support platform (35) and is connected to the rotating sleeve (36); One end of the third drive motor (4) is fixedly connected to the inner top of the processing seat (1), the top of the mounting top plate (5) is fixedly connected to the output end of the third drive motor (4), and the drilling and milling assembly (6) is mounted on the bottom of the mounting top plate (5); The reset assembly (34) comprises a fixed sleeve (341), a support spring (342) and a support head (343), wherein: The fixed sleeve (341) is fixedly sleeved on the outer wall of the assembly sleeve (33); the support head (343) is fixedly connected to the outer wall of the rotating sleeve (36) and is located on both sides of the assembly sleeve (33); The support spring (342) is provided between the fixed sleeve plate (341) and the support head (343), and they are connected via the support spring (342); The driving assembly (37) comprises a first driving motor (371), a main gear (372) and a driven gear (373), wherein: The first driving motor (371) is mounted on the inner top of the processing seat (1), the main gear (372) is rotatably connected to the top of the support platform (35), a plurality of driven teeth (373) are fixedly connected to the outer wall of the rotating sleeve plate (36) in a circumferential array, and the main gear (372) is meshingly connected with the driven teeth (373); The output end of the first driving motor (371) is fixedly connected to the top of the main gear (372).

2. The multi-spindle drilling and milling CNC machine tool according to claim 1, characterized in that: The drilling and milling assembly (6) comprises a second cylinder (61), a connecting plate (62), a supporting sleeve plate (63), a supporting side plate (64), a second driving motor (65), a rotating arm (66), an adsorption sleeve plate (67) and an electromagnet (68), wherein: The second cylinder (61) is mounted on the bottom of the mounting top plate (5), the top of the connecting plate (62) is fixedly connected to the output end of the second cylinder (61), one end of the supporting sleeve plate (63) is fixedly connected to the bottom of the connecting plate (62), and the supporting side plate (64) is fixedly connected to the outer wall of the supporting sleeve plate (63); The second drive motor (65) is mounted on the outer wall of the support side plate (64); the rotating arm (66) is rotatably connected to the inner wall of the support sleeve (63); one end of the rotating arm (66) is fixedly connected to the output end of the second drive motor (65); one end of the adsorption sleeve (67) is fixedly sleeved on the outer wall of the rotating arm (66); and the electromagnet (68) is mounted on the inner top of the adsorption sleeve (67).

3. The multi-spindle drilling and milling CNC machine tool according to claim 1, characterized in that: An installation groove (331) is provided at the end of the assembly plate (33), and a second magnetic suction head (332) is slidably mounted at the inner end of the installation groove (331).

4. The multi-spindle drilling and milling CNC machine tool according to claim 1, characterized in that: One end of the two first magnetic suction heads (32) close to the rotating sleeve plate (36) is a south pole and a north pole respectively.

5. The multi-spindle drilling and milling CNC machine tool according to claim 1, characterized in that: A multi-spindle operating table (21) is installed on the top of the processing table (2).

6. The multi-spindle drilling and milling CNC machine tool according to claim 2, characterized in that: The adsorption sleeve plate (67) moves up and down in a vertical direction at the center of the rotating sleeve plate (36).

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