A five-axis linkage CNC machine tool

Abstract

The present invention relates to the field of machine tool technology, and in particular to a five-axis linkage CNC machine tool, comprising a base frame and a support frame fixedly arranged on the base frame, the base frame being provided with a Y-axis assembly, the Y-axis assembly being connected to a base plate, the upper end of the base plate being provided with a fixture assembly, the support frame being provided with an X-axis assembly, the X-axis assembly being connected to a back plate frame, the back plate frame being provided with a Z-axis assembly, the Z-axis assembly being connected to a lifting platform, the lifting platform being provided with a tool holder rotating assembly, the tool holder rotating assembly being connected to a fixed tool holder, the fixed tool holder being provided with a tool rotating assembly. The present invention utilizes the tool holder rotating assembly and the tool rotating assembly to enable the tool to realize multi-dimensional and multi-angle processing in five degrees of freedom directions relative to a workpiece to be processed, and avoids the workpiece from rotating, thereby increasing the processing range, and the workpiece does not need to be rotated back when re-clamping and positioning, thereby simplifying the workpiece clamping process and helping to improve processing efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of machine tools, and in particular to a five-axis linkage CNC machine tool. Background Art

[0002] Five-axis CNC machine tools are high-tech, high-precision machines specifically designed for machining complex curved surfaces. These systems significantly impact a country's aviation, aerospace, military, scientific research, precision instruments, high-precision medical equipment, and other industries. Five-axis CNC machine tools are the only solution for machining impellers, blades, marine propellers, heavy-duty generator rotors, steam turbine rotors, large diesel engine crankshafts, and more.

[0003] Existing five-axis CNC machine tools often utilize a rotary table or cradle-style worktable with reciprocating motion along the X, Y, and Z axes to achieve five-axis machining. The workpiece to be machined is clamped within the rotary table or cradle-style worktable for rotation. However, in actual applications, to prevent the workpiece from colliding during rotation, the workpiece's rotation angle is often constrained in a certain direction. This undoubtedly reduces the machining range. Furthermore, the workpiece must be rotated back to its original position before re-clamping, which affects machining efficiency. Summary of the Invention

[0004] The purpose of the present invention is to provide a five-axis linkage CNC machine tool to solve the above technical problems.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A five-axis linkage CNC machine tool comprises a base frame and a support frame fixedly arranged on the base frame, the base frame is provided with a Y-axis assembly, the Y-axis assembly is connected to a base plate, the upper end of the base plate is installed with a fixture assembly, the support frame is provided with an X-axis assembly, the X-axis assembly is connected to a back plate frame, the back plate frame is provided with a Z-axis assembly, the Z-axis assembly is connected to a lifting platform, the lifting platform is provided with a tool holder rotating assembly, the tool holder rotating assembly is connected to a fixed tool holder, and the fixed tool holder is provided with a tool rotating assembly;

[0007] The clamp assembly includes a chassis, a chuck, a movable block, a movable seat corresponding to the movable block, and a clamping claw provided on the movable seat. The chassis is assembled and connected to the chuck. A linkage gear is rotatably installed in the center of the chassis. A plurality of movable blocks are provided and evenly distributed on the chassis. One side of each movable block close to the linkage gear is engaged with the linkage gear through a tooth groove. The movable block drives the corresponding movable seat and the clamping claw to move synchronously along the radial direction of the chuck.

[0008] The tool holder rotation assembly includes a tool holder rotation motor and a tool holder rotation wheel disc. The tool holder rotation motor is fixedly arranged on the lifting platform. The output end of the tool holder rotation motor is transmission-connected to the tool holder rotation wheel disc via a tool holder rotation belt. A first connecting shaft is fixedly connected to the bottom of the tool holder rotation wheel disc. The first connecting shaft is rotationally matched with the lifting platform via a first bearing. The first connecting shaft passes through the lifting platform and is connected to the fixed tool holder.

[0009] The tool rotation assembly includes a tool rotation motor and a tool rotation wheel. The tool rotation motor is fixedly arranged on the fixed tool holder. The output end of the tool rotation motor is transmission-connected to the tool rotation wheel through a tool rotation belt. A second connecting shaft is fixedly connected to one side of the tool rotation wheel. The second connecting shaft is rotationally matched with the fixed tool holder through a second bearing. The second connecting shaft passes through the fixed tool holder and is connected to the tool assembly.

[0010] As a further solution of the present invention: a driving rod is threadedly connected to the interior of one of the movable blocks along the length direction, and a guide rod is slidably connected to the interior of the other movable blocks along the length direction. The driving rod drives each movable block to perform linear displacement along its respective length direction through a linkage gear.

[0011] As a further solution of the present invention: the chuck is provided with a T-shaped groove corresponding to the movable seat, the movable seat slides in cooperation with the T-shaped groove, a movable adjustment block is provided inside the movable seat, and the clamping claw is connected to the movable adjustment block by a fixing bolt.

[0012] As a further solution of the present invention: a driving inclined groove is provided on the upper end surface of the movable block, and an inclined sliding block adapted to the driving inclined groove is provided on the bottom surface of the movable seat. The movable block drives the movable seat to realize radial movement through the extrusion action between the driving inclined groove and the inclined sliding block.

[0013] As a further solution of the present invention: the tool assembly includes a tool motor, a motor bracket and a tool body, the tool motor is fixedly installed in the motor bracket, the output end of the tool motor is connected to the tool body, and the second connecting shaft passes through the fixed tool holder and is fixedly connected to the motor bracket.

[0014] As a further solution of the present invention: the X-axis assembly includes an X-axis screw drive pair, an X-axis polished rod and an X-axis limit switch, the backplate frame is slidingly mounted on the X-axis polished rod, the X-axis screw drive pair threadably drives the backplate frame to move linearly along the X-axis polished rod, the X-axis limit switches are arranged at both ends of the support frame, and the backplate frame is provided with an X-axis stopper corresponding to the X-axis limit switch.

[0015] As a further solution of the present invention: the Y-axis assembly includes a Y-axis screw drive pair, a Y-axis polished rod and a Y-axis limit switch, the base plate is slidingly mounted on the Y-axis polished rod, the Y-axis screw drive pair threadably drives the base plate to move linearly along the Y-axis polished rod, the Y-axis limit switches are arranged at both ends of the base frame, and the base plate is provided with a Y-axis stopper corresponding to the Y-axis limit switch.

[0016] As a further solution of the present invention: the Z-axis assembly includes a Z-axis screw drive pair, a Z-axis polished rod and a Z-axis limit switch; the lifting platform is slidingly mounted on the Z-axis polished rod; the Z-axis screw drive pair threadably drives the lifting platform to move linearly along the Z-axis polished rod; the Z-axis limit switch is arranged at the upper and lower ends of the backplane frame; and the lifting platform is provided with a Z-axis stopper corresponding to the Z-axis limit switch.

[0017] Beneficial effects of the present invention:

[0018] (1) The present invention utilizes a tool holder rotating assembly to drive the tool assembly to realize a rotational movement around the Z axis, and simultaneously utilizes a tool rotating assembly to drive the tool assembly to realize a rotational movement around the Y axis, and cooperates with the reciprocating motion of the X axis assembly, the Y axis assembly and the Z axis assembly, so that the tool can realize multi-dimensional and multi-angle processing in five degrees of freedom directions relative to the workpiece to be processed. Compared with the processing method of the traditional five-axis linkage CNC machine tool that uses a turntable or a cradle-type workbench to drive the workpiece to rotate, the present invention combines the tool holder rotating assembly and the tool rotating assembly to avoid the workpiece rotation process while ensuring five-axis processing, thereby increasing the processing range, and the workpiece does not need to be rotated back when re-clamping and positioning, which simplifies the workpiece clamping process and is conducive to improving processing efficiency;

[0019] (2) The movable blocks in the present invention are all meshed with the linkage gears through the tooth grooves. When one of the movable blocks is linearly displaced along the length direction, it will drive the linkage gear to rotate, and then drive the other evenly distributed movable blocks to synchronously displace linearly. At the same time, each movable block will drive the moving seat and the clamping claw to move synchronously along the radial direction of the chuck during the linear displacement process, thereby realizing the synchronous drive of the clamping claws and ensuring the centering effect of the synchronous clamping. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a structural diagram of the X-axis assembly in the present invention;

[0023] Figure 3 It is a schematic structural diagram of the Z-axis assembly in the present invention;

[0024] Figure 4 It is a structural schematic diagram of the tool holder rotating assembly and the tool rotating assembly in the present invention;

[0025] Figure 5 It is a structural schematic diagram of the tool assembly in the present invention;

[0026] Figure 6 It is a schematic structural diagram of the Y-axis assembly of the present invention;

[0027] Figure 7 It is a structural schematic diagram of the clamp assembly of the present invention;

[0028] Figure 8 It is a structural exploded view of the clamp assembly in the present invention.

[0029] In the figure: 1. chassis; 11. support frame; 12. bottom plate; 2. X-axis assembly; 21. X-axis screw drive pair; 22. X-axis polished rod; 3. Y-axis assembly; 31. Y-axis screw drive pair; 32. Y-axis polished rod; 4. Z-axis assembly; 41. Z-axis screw drive pair; 42. Z-axis polished rod; 5. fixture assembly; 51. chassis; 52. chuck; 521. T-type slide; 53. movable block; 531. driving inclined groove; 54. movable seat; 541. inclined slide; 55. clamping claw; 56. linkage gear; 57. movable Adjusting block; 58. Driving rod; 59. Guide rod; 6. Back plate frame; 61. Lifting platform; 62. Fixed tool holder; 7. Tool holder rotation assembly; 71. Tool holder rotation motor; 72. Tool holder rotation wheel; 73. Tool holder rotation belt; 74. First connecting shaft; 75. First bearing; 8. Tool rotation assembly; 81. Tool rotation motor; 82. Tool rotation wheel; 83. Tool rotation belt; 84. Second connecting shaft; 85. Second bearing; 9. Tool assembly; 91. Tool motor; 92. Motor bracket; 93. Tool body. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0031] See also Figure 1-Figure 3As shown, the present invention is a five-axis linkage CNC machine tool, including a base frame 1 and a support frame 11 fixedly arranged on the base frame 1, a Y-axis assembly 3 is arranged on the base frame 1, the Y-axis assembly 3 is connected to a base plate 12, a clamp assembly 5 is installed on the upper end of the base plate 12, an X-axis assembly 2 is arranged on the support frame 11, the X-axis assembly 2 is connected to a back plate frame 6, a Z-axis assembly 4 is arranged on the back plate frame 6, the Z-axis assembly 4 is connected to a lifting platform 61, a tool holder rotating assembly 7 is installed on the lifting platform 61, the tool holder rotating assembly 7 is connected to a fixed tool holder 62, and a tool rotating assembly 8 is arranged on the fixed tool holder 62.

[0032] like Figure 7 and Figure 8 As shown, the clamp assembly 5 includes a chassis 51, a chuck 52, a movable block 53, a movable seat 54 corresponding to the movable block 53, and a clamping claw 55 arranged on the movable seat 54. The chassis 51 is assembled and connected with the chuck 52. A linkage gear 56 is rotatably installed in the center of the chassis 51. There are multiple movable blocks 53 and they are evenly distributed on the chassis 51. Each movable block 53 is close to the side of the linkage gear 56 through the tooth groove and is gear-engaged with the linkage gear 56. The movable block 53 drives the corresponding movable seat 54 and the clamping claw 55 to move synchronously along the radial direction of the chuck 52.

[0033] Specifically, in order to enable the clamping claw 55 to achieve synchronous centering clamping when clamping the workpiece, each movable block 53 is meshed with the linkage gear 56 through the tooth groove. When one of the movable blocks 53 is linearly displaced along the length direction, it will drive the linkage gear 56 to rotate, and then drive the other evenly distributed movable blocks 53 to synchronously displace linearly. At the same time, each movable block 53 will drive the moving seat 54 and the clamping claw 55 to move synchronously along the radial direction of the chuck 52 during the linear displacement process, thereby realizing the synchronous drive of the clamping claw 55 and ensuring the centering effect of the synchronous clamping.

[0034] like Figure 4 and Figure 5 As shown, the tool holder rotation assembly 7 includes a tool holder rotation motor 71 and a tool holder rotation wheel 72. The tool holder rotation motor 71 is fixedly arranged on the lifting platform 61. The output end of the tool holder rotation motor 71 is transmission-connected to the tool holder rotation wheel 72 via a tool holder rotation belt 73. A first connecting shaft 74 is fixedly connected to the bottom of the tool holder rotation wheel 72. The first connecting shaft 74 is rotationally matched with the lifting platform 61 through a first bearing 75. The first connecting shaft 74 passes through the lifting platform 61 and is connected to the fixed tool holder 62.

[0035] The tool rotation assembly 8 includes a tool rotation motor 81 and a tool rotation disc 82. The tool rotation motor 81 is fixedly arranged on the fixed tool holder 62. The output end of the tool rotation motor 81 is transmission-connected to the tool rotation disc 82 through a tool rotation belt 83. A second connecting shaft 84 is fixedly connected to one side of the tool rotation disc 82. The second connecting shaft 84 is rotationally matched with the fixed tool holder 62 through a second bearing 85. The second connecting shaft 84 passes through the fixed tool holder 62 and is connected to the tool assembly 9.

[0036] Specifically, the tool holder rotation motor 71 is started, and the tool holder rotation disc 72 is driven to rotate through the tool holder rotation belt 73, and the tool holder rotation disc 72 drives the fixed tool holder 62 to rotate through the first connecting shaft 74, so that the tool assembly 9 on the fixed tool holder 62 can realize the rotation action around the Z axis. At the same time, the tool rotation motor 81 is started, and the tool rotation disc 82 is driven to rotate through the tool rotation belt 83, and the tool rotation disc 82 drives the tool assembly 9 to rotate through the second connecting shaft 84, so that the tool assembly 9 can realize the rotation action around the Y axis, cooperating with the X axis assembly The reciprocating motion of component 2, Y-axis component 3 and Z-axis component 4 enables the tool to realize multi-dimensional and multi-angle processing in five degrees of freedom directions relative to the workpiece to be processed. Compared with the traditional five-axis linkage CNC machine tool that uses a turntable or cradle-type worktable to drive the workpiece to rotate, the present invention combines the tool holder rotation component 7 and the tool rotation component 8 to avoid the workpiece rotation process while ensuring five-axis processing, thereby increasing the processing range, and the workpiece does not need to be rotated back when re-clamping and positioning, which simplifies the workpiece clamping process and is conducive to improving processing efficiency.

[0037] Further, if Figure 8 As shown, a driving rod 58 is threadedly connected to the interior of one of the movable blocks 53 along the length direction, and a guide rod 59 is slidably connected to the interior of the other movable blocks 53 along the length direction. The driving rod 58 drives each movable block 53 to perform linear displacement along its respective length direction through the linkage gear 56.

[0038] Specifically, the driving rod 58 is driven by an external driving source to achieve rotation. During the rotation process, the driving rod 58 will drive the movable block 53 to perform linear displacement along the driving rod 58. During the displacement process, the movable block 53 will drive the linkage gear 56 to rotate through the tooth groove, so that other movable blocks 53 can be synchronously displaced linearly along the corresponding guide rod 59, thereby realizing the synchronous drive of the moving seat 54, ensuring that the clamping claw 55 can be synchronously centered and clamped when clamping the workpiece.

[0039] It should be noted that both ends of the guide rod 59 are connected and fixed to the chuck 52, wherein the chuck 52 is provided with mounting holes corresponding to each guide rod 59, and both ends of the drive rod 58 are rotatably matched with the chuck 52, and the chuck 52 is provided with rotating holes corresponding to the drive rod 58.

[0040] Further, if Figure 8 As shown, the chuck 52 is provided with a T-shaped groove 521 corresponding to the movable seat 54, the movable seat 54 slides with the T-shaped groove 521, and a movable adjustment block 57 is provided inside the movable seat 54. The clamping claw 55 is connected to the movable adjustment block 57 by a fixing bolt.

[0041] Specifically, in order to ensure the stability of the movable seat 54 during radial movement, the T-shaped slide groove 521 is arranged along the radial direction of the chuck 52, and the movable seat 54 is slidably installed in the T-shaped slide groove 521; at the same time, in order to adjust the clamping distance between the clamping claw 55 and the center of the chuck 52 to meet the clamping requirements of workpieces of different sizes, a movable adjustment block 57 is provided inside the movable seat 54 to facilitate the adjustment of the initial clamping position of the clamping claw 55 on the movable seat 54.

[0042] Furthermore, if Figure 8 As shown, a driving inclined groove 531 is provided on the upper end surface of the movable block 53, and an inclined sliding block 541 adapted to the driving inclined groove 531 is provided on the bottom surface of the movable seat 54. The movable block 53 drives the movable seat 54 to realize radial movement through the extrusion action between the driving inclined groove 531 and the inclined sliding block 541.

[0043] Specifically, the driving bevel groove 531 always maintains a sliding fit with the bevel slider 541. When the movable block 53 moves linearly along the length direction, the driving bevel groove 531 will push the bevel slider 541 to move along the radial direction of the chuck 52, so that the clamping claw 55 can achieve clamping or loosening action.

[0044] Further, if Figure 5 As shown, the tool assembly 9 includes a tool motor 91, a motor bracket 92 and a tool body 93. The tool motor 91 is fixedly installed in the motor bracket 92. The output end of the tool motor 91 is connected to the tool body 93. The second connecting shaft 84 passes through the fixed tool holder 62 and is fixedly connected to the motor bracket 92.

[0045] like Figure 2 As shown, the X-axis assembly 2 includes an X-axis screw drive pair 21, an X-axis optical rod 22 and an X-axis limit switch. The back plate frame 6 is slidingly mounted on the X-axis optical rod 22. The X-axis screw drive pair 21 threadably drives the back plate frame 6 to move linearly along the X-axis optical rod 22. The X-axis limit switches are arranged at both ends of the support frame 11, and the back plate frame 6 is provided with X-axis stoppers corresponding to the X-axis limit switches.

[0046] Specifically, in order to realize the limiting action of the extreme positions at both ends of the reciprocating motion of the X-axis assembly 2, the X-axis limit switches are arranged at both ends of the support frame 11, and the back plate frame 6 is provided with an X-axis stopper, and the X-axis stopper is located between the X-axis limit switches at both ends. When the X-axis screw drive pair 21 drives the back plate frame 6 to move along the X-axis light rod 22 to the extreme positions at both ends, the X-axis stopper touches the X-axis limit switch to stop the driving action of the X-axis screw drive pair 21, thereby realizing the limiting process of the reciprocating motion in the X-axis direction.

[0047] like Figure 1 As shown, the Y-axis assembly 3 includes a Y-axis screw drive pair 31, a Y-axis polished rod 32 and a Y-axis limit switch. The base plate 12 is slidably mounted on the Y-axis polished rod 32. The Y-axis screw drive pair 31 threadably drives the base plate 12 to move linearly along the Y-axis polished rod 32. The Y-axis limit switches are arranged at both ends of the base frame 1, and a Y-axis stop block corresponding to the Y-axis limit switch is provided on the base plate 12.

[0048] Specifically, in order to realize the limiting action of the Y-axis component 3 at the extreme positions at both ends during the reciprocating motion, the Y-axis limit switches are arranged at both ends of the base frame 1, and a Y-axis stopper is arranged on the base plate 12, and the Y-axis stopper is located between the Y-axis limit switches at both ends. When the Y-axis screw drive pair 31 drives the base plate 12 to move along the Y-axis light rod 32 to the extreme positions at both ends, the Y-axis stopper touches the Y-axis limit switch to stop the driving action of the Y-axis screw drive pair 31, thereby realizing the limiting process of the reciprocating motion in the Y-axis direction.

[0049] like Figure 3 As shown, the Z-axis assembly 4 includes a Z-axis screw drive pair 41, a Z-axis polished rod 42, and a Z-axis limit switch. A lifting platform 61 is slidably mounted on the Z-axis polished rod 42. The Z-axis screw drive pair 41 threadably drives the lifting platform 61 to move linearly along the Z-axis polished rod 42. The Z-axis limit switches are located at the upper and lower ends of the backplane frame 6, and the lifting platform 61 is provided with Z-axis stops corresponding to the Z-axis limit switches. Similarly, the Z-axis limit switch and Z-axis stopper limit process in the Z-axis direction is similar to that of the X-axis and Y-axis, and will not be further elaborated here.

[0050] The working principle of the present invention is as follows: Figures 1-8As shown, when in use, the driving rod 58 is driven by an external driving source to realize rotation. The driving rod 58 drives the movable block 53 to perform linear displacement along the driving rod 58 during the rotation process. The movable block 53 drives the linkage gear 56 to rotate through the tooth groove during the displacement process, so that the other movable blocks 53 can synchronously perform linear displacement along the corresponding guide rod 59, thereby realizing the synchronous driving of the movable seat 54. In the process of linear movement of the movable block 53 along the length direction, the driving inclined groove 531 pushes the inclined slider 541 to move along the radial direction of the chuck 52, so that the clamping claw 55 can realize clamping or loosening action, ensuring that the clamping claw 55 can be synchronously centered and clamped when clamping the workpiece. After the tool holder is turned, the tool holder rotation motor 71 is started, and the tool holder rotation disc 72 is driven to rotate through the tool holder rotation belt 73, and the tool holder rotation disc 72 drives the fixed tool holder 62 to rotate through the first connecting shaft 74, so that the tool assembly 9 on the fixed tool holder 62 can realize the rotation movement around the Z axis. At the same time, the tool rotation motor 81 is started, and the tool rotation disc 82 is driven to rotate through the tool rotation belt 83, and the tool rotation disc 82 drives the tool assembly 9 to rotate through the second connecting shaft 84, so that the tool assembly 9 can realize the rotation movement around the Y axis, and cooperate with the reciprocating motion of the X-axis assembly 2, the Y-axis assembly 3 and the Z-axis assembly 4, so that the tool can realize multi-dimensional and multi-angle processing in five degrees of freedom directions relative to the workpiece to be processed.

[0051] The above is a detailed description of an embodiment of the present invention. However, the content described is only a preferred embodiment of the present invention and should not be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A five-axis CNC machine tool, comprising a base frame (1) and a support frame (11) fixedly arranged on the base frame (1), characterized in that: The base frame (1) is provided with a Y-axis assembly (3), the Y-axis assembly (3) is connected to a bottom plate (12), the upper end of the bottom plate (12) is installed with a clamp assembly (5), the support frame (11) is provided with an X-axis assembly (2), the X-axis assembly (2) is connected to a back plate frame (6), the back plate frame (6) is provided with a Z-axis assembly (4), the Z-axis assembly (4) is connected to a lifting platform (61), the lifting platform (61) is provided with a tool holder rotating assembly (7), the tool holder rotating assembly (7) is connected to a fixed tool holder (62), and the fixed tool holder (62) is provided with a tool rotating assembly (8); The clamp assembly (5) comprises a chassis (51), a chuck (52), a movable block (53), a movable seat (54) corresponding to the movable block (53) and a clamping claw (55) arranged on the movable seat (54); the chassis (51) is assembled and connected with the chuck (52); a linkage gear (56) is rotatably installed at the center of the chassis (51); a plurality of movable blocks (53) are provided and evenly distributed on the chassis (51); a side of each movable block (53) close to the linkage gear (56) is tooth-engaged with the linkage gear (56) through a tooth groove; the movable block (53) drives the corresponding movable seat (54) and the clamping claw (55) to move synchronously along the radial direction of the chuck (52); The tool holder rotating assembly (7) includes a tool holder rotating motor (71) and a tool holder rotating wheel (72), wherein the tool holder rotating motor (71) is fixedly arranged on the lifting platform (61), and the output end of the tool holder rotating motor (71) is connected to the tool holder rotating wheel (72) through a tool holder rotating belt (73), and a first connecting shaft (74) is fixedly connected to the bottom of the tool holder rotating wheel (72), and the first connecting shaft (74) is rotatably matched with the lifting platform (61) through a first bearing (75), and the first connecting shaft (74) passes through the lifting platform (61) and is connected to the fixed tool holder (62); The tool rotating assembly (8) comprises a tool rotating motor (81) and a tool rotating disc (82); the tool rotating motor (81) is fixedly arranged on the fixed tool holder (62); the output end of the tool rotating motor (81) is transmission-connected to the tool rotating disc (82) via a tool rotating belt (83); a second connecting shaft (84) is fixedly connected to one side of the tool rotating disc (82); the second connecting shaft (84) is rotationally matched with the fixed tool holder (62) via a second bearing (85); the second connecting shaft (84) passes through the fixed tool holder (62) and is connected to the tool assembly (9).

2. A five-axis CNC machine tool according to claim 1, characterized in that: A driving rod (58) is threadedly connected to the interior of one of the movable blocks (53) along the length direction, and a guide rod (59) is slidably connected to the interior of the other movable blocks (53) along the length direction. The driving rod (58) drives each movable block (53) to perform linear displacement along its respective length direction through a linkage gear (56).

3. The five-axis CNC machine tool according to claim 2, characterized in that: The chuck (52) is provided with a T-shaped slide groove (521) corresponding to the movable seat (54), the movable seat (54) and the T-shaped slide groove (521) are slidably matched, a movable adjustment block (57) is provided inside the movable seat (54), and the clamping claw (55) is connected to the movable adjustment block (57) through a fixing bolt.

4. The five-axis CNC machine tool according to claim 3, characterized in that: The upper end surface of the movable block (53) is provided with a driving inclined groove (531), and the bottom surface of the movable seat (54) is provided with an inclined sliding block (541) adapted to the driving inclined groove (531). The movable block (53) drives the movable seat (54) to achieve radial movement through the squeezing action between the driving inclined groove (531) and the inclined sliding block (541).

5. The five-axis CNC machine tool according to claim 1, characterized in that: The tool assembly (9) comprises a tool motor (91), a motor bracket (92) and a tool body (93); the tool motor (91) is fixedly installed in the motor bracket (92); the output end of the tool motor (91) is connected to the tool body (93); and the second connecting shaft (84) passes through the fixed tool holder (62) and is fixedly connected to the motor bracket (92).

6. The five-axis CNC machine tool according to claim 1, characterized in that: The X-axis assembly (2) includes an X-axis screw drive pair (21), an X-axis optical rod (22) and an X-axis limit switch; the back plate frame (6) is slidably mounted on the X-axis optical rod (22); the X-axis screw drive pair (21) drives the back plate frame (6) to move linearly along the X-axis optical rod (22); the X-axis limit switch is arranged at both ends of the support frame (11); and an X-axis stopper corresponding to the X-axis limit switch is arranged on the back plate frame (6).

7. The five-axis CNC machine tool according to claim 1, characterized in that: The Y-axis assembly (3) includes a Y-axis screw drive pair (31), a Y-axis smooth rod (32) and a Y-axis limit switch. The base plate (12) is slidably mounted on the Y-axis smooth rod (32). The Y-axis screw drive pair (31) drives the base plate (12) to move linearly along the Y-axis smooth rod (32). The Y-axis limit switch is arranged at both ends of the base frame (1). The base plate (12) is provided with a Y-axis stopper corresponding to the Y-axis limit switch.

8. The five-axis CNC machine tool according to claim 1, characterized in that: The Z-axis assembly (4) includes a Z-axis screw drive pair (41), a Z-axis polished rod (42) and a Z-axis limit switch; the lifting platform (61) is slidably mounted on the Z-axis polished rod (42); the Z-axis screw drive pair (41) threadably drives the lifting platform (61) to move linearly along the Z-axis polished rod (42); the Z-axis limit switch is arranged at the upper and lower ends of the back plate frame (6); and the lifting platform (61) is provided with a Z-axis stopper corresponding to the Z-axis limit switch.

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