Five-axis rotating CNC machining center

Abstract

The invention relates to the technical field of machining, in particular to a five-axis rotating CNC machining center which comprises a main body, a power device, rotating arms, a movable table, a fixed table and a transmission assembly, the fixed table is connected between the two rotating arms, the cross section of the fixed table is in an arc shape, an arc-shaped groove is formed in the lower portion of the fixed table, and the transmission assembly is arranged in the arc-shaped groove. Fixed teeth are connected to the upper portion of the inner wall of the arc-shaped groove, the transmission assembly comprises a plurality of fixed shells, a worm and a universal shaft, the multiple fixed shells are connected to the upper portion of the movable table in a front-back symmetry mode relative to the power device, and the worm is connected to the upper portions of the fixed shells and tangent to the lower portion of the fixed table. By arranging the worm, the worm and the fixed table form a worm and gear structure, so that the original stress on the rotating shaft is changed into direct stress on the fixed table, the stress on the rotating shaft is avoided, meanwhile, the stability during processing is improved by utilizing the self-locking characteristic of the worm and gear, and the error caused by vibration during processing is further reduced.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical processing, in particular to a five-axis rotary CNC processing center. Background Art

[0002] The five-axis rotary CNC machining center is a CNC machine tool that can simultaneously control the movement of five coordinate axes, relying on its precise control system and advanced motion control algorithms. These five coordinate axes are usually the X, Y, and Z axes that represent the lateral, longitudinal, and vertical movement of the workpiece in the machine tool coordinate system, and the A, B, or C axis that represents the rotational movement of the workpiece or tool. The five-axis machining center can complete the processing of complex curved surfaces in one clamping.

[0003] During the machining process, first, the workpiece to be machined is fixed on the workbench and accurately positioned by a fixture. This step is crucial to ensuring machining accuracy. The control system controls the movement of the stepper motors or servo motors of each axis through a computer according to a pre-programmed machining program, thereby realizing the movement of the workpiece in the X, Y, and Z axis directions, and the workpiece or tool rotates in the A, B, or C axis direction, so that the five-axis machining center can flexibly cut any curved surface of the workpiece.

[0004] Five-axis machining centers can be divided into three types according to the different locations of the two rotating axes: two rotating axes are set on the workbench, two rotating axes are set on the spindle, and two rotating axes are set on the workbench and the spindle respectively. The most common type on the market is the vertical five-axis machining center with two rotating axes set on the workbench. The advantages of this type of vertical five-axis machining center are simple spindle structure, good spindle rigidity, relatively low manufacturing cost, and the ability to process complex spatial surfaces. It is the most widely used type of five-axis machining center in the industry.

[0005] However, during the machining process, when the degree of rotation of the worktable vertical direction (A) is greater than or equal to 90 degrees, due to the influence of the gravity of the worktable, the workpiece will bring a large load moment to the worktable when cutting, which may easily damage the rotating axis and affect the machining accuracy.

[0006] Therefore, a five-axis rotary CNC machining center is proposed. Summary of the invention

[0007] The purpose of the present invention is to provide a five-axis rotary CNC machining center. In order to solve the problem that when the rotating shaft is rotated to a position greater than or equal to 90 degrees, the torque applied to the rotating shaft is large and easy to deform. A fixed table is driven to rotate by a worm gear, and the force point when the fixed table is driven is changed, thereby solving the problem that when the rotating shaft is rotated to a position greater than or equal to 90 degrees, the torque applied to the rotating shaft is large and easy to deform. At the same time, the self-locking characteristics of the worm gear are used to fix the vertical rotation of the fixed table, thereby improving the stability of the machining.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] A five-axis rotary CNC machining center comprises a main body, a power device, a rotary arm, a movable table, a fixed table and a transmission assembly, wherein the fixed table is connected between two rotary arms, the cross section of the fixed table is set to be arc-shaped, an arc-shaped groove is opened below the fixed table, and a fixed tooth is connected to the upper inner wall of the arc-shaped groove, and the transmission assembly comprises a fixed shell, a worm and a universal shaft, a plurality of the fixed shells are connected to the upper part of the movable table symmetrically with respect to the front and rear of the power device, the worm is connected to the upper part of the fixed shell and is tangent to the lower part of the fixed table, the worm is meshed with the fixed tooth, and the universal shaft is connected between two worms, and a plurality of the universal shafts and the worm are connected in series to form a multi-segment line shape tangent to the lower part of the fixed table, the universal shaft is driven to rotate by the power device, and the worm is driven to rotate when the universal shaft rotates, and the fixed table is driven to rotate by the meshing of the worm and the fixed tooth.

[0010] In the above scheme, multiple worms are meshed with teeth under the fixed table to form multiple worm gear structures, and the driving mode of the rotating shaft in the prior art is changed to being driven by a worm gear, thereby changing the original force on the rotating shaft to being directly exerted by the fixed table, thereby avoiding the problem of easy deformation of the rotating shaft due to the force on the rotating shaft. At the same time, the self-locking characteristics of the worm gear are utilized to improve the stability during processing, thereby reducing the error caused by vibration during processing.

[0011] Preferably, balls are connected to the front and rear sides of the fixed teeth, and the balls are tangent to the inner wall of the worm.

[0012] In the above scheme, since there is a large friction between the worm gear and the worm, it is not suitable for long-term operation. The rollers on the front and rear sides of the teeth are in contact with the worm, thereby reducing the friction during meshing.

[0013] Preferably, a spiral groove is provided on the inner wall of the worm, and the spiral groove is fitted with the outer wall of the ball.

[0014] In the above scheme, the force-bearing area of ​​the ball is increased by cooperating with the spiral groove, and the force-bearing strength of the teeth and the worm is improved.

[0015] Preferably, movable teeth are hinged on both the front and rear sides of the arc-shaped groove, and the movable teeth are engaged with the worm.

[0016] In the above solution, a torsion spring is connected to the junction of the movable teeth, thereby reducing the impact force when the fixed teeth separate from one or both worms and then contact each other during the rotation of the fixed platform.

[0017] Preferably, the outer wall of the fixed shell is connected to a slider assembly, and the slider assembly includes an arc-shaped slide groove, a fixed slide block, a movable slide block, a connecting plate and a push block, the arc-shaped slide groove is opened on both sides of the inner wall of the arc-shaped slide groove, the fixed slide block is connected to the rear side of the fixed slide block, the movable slide block is slidably connected to the rear side of the fixed slide block, the fixed slide block and the movable slide block are both connected to the arc-shaped slide groove, the connecting plate is connected below the movable slide block, the push block is connected to the side of the connecting plate close to the fixed shell, and the top end is a beveled edge, the push block passes through the inner wall of the fixed shell, and a sealing assembly is connected to the top.

[0018] In the above solution, the fixed sliding block and the movable sliding block are slidably connected with the arc-shaped sliding groove, thereby increasing the supporting force of the fixed platform during rotation, thereby increasing the stability of the fixed platform during rotation.

[0019] Preferably, the top-view cross-section of the fixed sliding block is configured as a right-angled trapezoid, and the rear ends of the two fixed sliding blocks are close to each other.

[0020] In the above solution, by reducing the width above the fixed slider and the distance between the ends of the two fixed sliders, it is easier to dock with the arc-shaped slide groove when the fixed platform is separated from the fixed shell and then reset.

[0021] Preferably, the side wall of the movable slider is configured as a bevel, and the inclination angle is the same as the inclination angle of the bevel of the fixed slider.

[0022] In the above scheme, the slope of the movable slider's hypotenuse is the same as that of the fixed slider, so that the arc-shaped slide groove transitions from the fixed slider to the movable slider more smoothly.

[0023] Preferably, the sealing assembly is connected to the top of the fixed shell, and the sealing assembly includes a sealing plate, a telescopic rod and a moving block. The sealing plate is hinged to the top of the fixed shell, and a torsion spring is connected to the hinge of the sealing plate. The two moving blocks are slidably connected to the inner wall of the fixed shell and are respectively connected to the two ends of the worm gear. The telescopic rod is hinged between the sealing plate and the moving block, and the moving block is connected to the push block at the bottom.

[0024] In the above scheme, a torsion spring is connected to the hinge of the sealing plate, and when the movable slider is separated from the arc-shaped slide groove, the torsion force of the torsion spring causes the two cover plates to seal the upper part of the fixed shell.

[0025] Preferably, a cover plate assembly is connected above the fixed platform, and the cover plate assembly includes a front cover plate and a side cover plate. The front cover plate is located at the opening of the arc groove, and the side cover plate is located at the opening of the arc slide groove and is located below the front cover plate. The width of the side cover plate is equal to the width of the arc slide groove, and the width of the front cover plate is equal to the width of the arc groove.

[0026] In the above scheme, the openings of the arc groove and the arc chute are shielded by the front cover plate and the side cover plate, thereby preventing waste chips from entering the arc chute during the cutting process, causing increased friction or jamming of the fixed table when it rotates.

[0027] Preferably, a slot is provided above the front cover plate, and the slot is aligned with the side cover plate, the width of the slot is greater than the distance between the ends of the two fixed sliders, and a protrusion is connected below the front cover plate, and the protrusion is connected to the top of the side cover plate.

[0028] In the above solution, when the fixed shell is reset after being separated from the fixed platform, the front cover is pushed to rotate by engaging the clamping groove with the side of the fixed slider, thereby reducing the impact on the front side of the fixed slider.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. By setting a worm, the worm and the fixed table form a worm gear structure, so that the original force on the rotating axis is changed to being directly exerted by the fixed table, thereby avoiding the force on the rotating axis. At the same time, the self-locking characteristics of the worm gear are utilized to improve the stability during processing, thereby reducing the error caused by vibration during processing.

[0031] 2. By setting up a slider assembly, the fixed slider and the movable slider are connected to the arc-shaped slide groove, thereby generating a lateral support force on the inner wall of the arc-shaped slide groove, thereby improving the stability of the fixed table during rotation, and providing a lateral support force during cutting, thereby improving the stability during cutting, and reducing the error caused by vibration during cutting.

[0032] 3. By setting the ball and spiral slide, rolling friction is used instead of sliding friction, thereby reducing the friction force on the worm, thereby reducing the wear of the worm during use. At the same time, the inner wall of the slide covers the outer wall of the ball, and the point contact when the ball and the worm are tangent is changed to surface contact, thereby increasing the force-bearing area of ​​the ball during meshing, thereby improving the force-bearing capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0034] Figure 2 It is a side cross-sectional schematic diagram of the present invention;

[0035] Figure 3 It is a schematic diagram of the transmission assembly structure of the present invention;

[0036] Figure 4 For the present invention Figure 3 The enlarged structural diagram of the middle C part;

[0037] Figure 5 For the present invention Figure 3 The enlarged structural diagram of part B in the middle;

[0038] Figure 6 It is a top view schematic diagram of the slider assembly of the present invention;

[0039] Figure 7 It is a schematic diagram of the structure of the sealing assembly of the present invention;

[0040] Figure 8 It is a schematic diagram of the enlarged structure of part A in 3 of the present invention.

[0041] In the figure: 1. main body; 2. power device; 3. rotating arm; 4. moving platform; 5. fixed platform; 501. arc groove; 502. fixed teeth; 503. ball bearing; 504. movable teeth; 6. transmission assembly; 601. fixed shell; 602. worm; 603. universal shaft; 604. spiral slide; 7. slider assembly; 701. arc groove; 702. fixed slider; 703. movable slider; 704. connecting plate; 705. push block; 8. sealing assembly; 801. sealing plate; 802. telescopic rod; 803. moving block; 9. cover assembly; 901. front cover; 902. side cover; 903. slot; 904. bump. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention, and combine the working state to make its structural features more detailed. 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 creative work are within the scope of protection of the present invention.

[0043] See also Figures 1 to 8 The present invention provides a five-axis rotary CNC machining center, and the technical solution is as follows:

[0044] A five-axis rotary CNC machining center, referring to Figure 1 , Figure 2 and Figure 3, including a main body 1, a power device 2, a rotating arm 3, a mobile platform 4, a fixed platform 5 and a transmission assembly 6, wherein the fixed platform 5 is connected between the two rotating arms 3, the cross section of the fixed platform 5 is set to be arc-shaped, an arc groove 501 is opened below the fixed platform 5, and a fixed tooth 502 is connected to the upper inner wall of the arc groove 501, and the transmission assembly 6 includes a fixed shell 601, a worm 602 and a universal shaft 603, and a plurality of the fixed shells 601 are connected to the upper part of the mobile platform 4 symmetrically with respect to the power device 2, the worm 602 is connected to the upper part of the fixed shell 601, and is tangent to the lower part of the fixed platform 5, and the worm 602 is connected to the fixed tooth 5 02 meshing, the universal joint 603 is connected between two worm gears 602, and multiple universal joints 603 and worm gears 602 are connected in series to form a multi-segment line tangent to the bottom of the fixed platform 5. The power device 2 drives the universal joint 603 to rotate. When the universal joint 603 rotates, it drives the worm gear 602 to rotate, and the fixed platform 5 is driven to rotate through the meshing of the worm gear 602 and the fixed teeth 502. The original rotating shaft drive is changed to the drive through the worm gear 602, thereby avoiding the rotating shaft from being deformed by force. At the same time, the self-locking characteristics of the worm gear 602 can also improve the stability during cutting and reduce the error caused by vibration generated during cutting.

[0045] As an embodiment of the present invention, refer to Figure 4 , the front and rear sides of the fixed teeth 502 are connected with balls 503, and the balls 503 are tangent to the inner wall of the worm 602. When the fixed teeth 502 are meshed with the worm 602, the balls 503 on the front or rear sides of the fixed teeth 502 are connected to the worm 602, and rolling friction is used instead of sliding friction, thereby reducing the friction force on the worm 602, thereby reducing the wear of the worm 602 during use. The inner wall of the worm 602 is provided with a spiral groove 604, and the spiral groove 604 is in contact with the outer wall of the ball 503. By providing a spiral groove 604 on the inner wall of the worm 602 and connecting it with the ball 503, the inner wall of the groove covers the outer wall of the ball 503, changing the point contact tangent to the ball 503 to surface contact, thereby increasing the force-bearing area of ​​the ball 503 during meshing, thereby improving the force-bearing capacity.

[0046] As an embodiment of the present invention, refer to Figure 8 The arc groove 501 is hinged with movable teeth 504 on both the front and rear sides, and the movable teeth 504 are meshed with the worm 602, so that the movable teeth 504 are hinged on the front and rear sides of the inner wall of the arc groove 501 through the torsion spring. When the fixed platform 5 rotates, the worm 602 first meshes with the movable teeth 504, and the impact force during the meshing drives the movable teeth 504 to rotate, thereby reducing the impact force between the movable teeth 504 and the worm 602, thereby avoiding damage to the worm 602 caused by the impact force of the fixed platform 5 and the worm 602 after separation and then meshing.

[0047] As an embodiment of the present invention, refer to Figure 7 The sealing assembly 8 is connected to the top of the fixed shell 601. The sealing assembly 8 includes a sealing plate 801, a telescopic rod 802 and a moving block 803. The sealing plate 801 is hinged to the top of the fixed shell 601. A torsion spring is connected to the hinge of the sealing plate 801. The two moving blocks 803 are slidably connected to the inner wall of the fixed shell 601 and are respectively connected to the two ends of the worm 602. The telescopic rod 802 is hinged between the sealing plate 801 and the moving block 803. The lower part of the moving block 803 is connected to the push block 705. When the worm When the rod 602 is separated from the fixed teeth 502, the sealing plate 801 rotates under the torsion of the torsion spring, thereby sealing the top of the fixed shell 601 to prevent waste chips from entering the interior of the fixed shell 601 during cutting and jamming the interior. When the sealing plate 801 rotates, the sealing plate 801 pushes the moving block 803 downward through the telescopic rod 802. When the moving block 803 moves downward, it drives the worm 602 downward, allowing the worm 602 to enter the interior of the fixed shell 601, and at the same time, the moving slider 703 is lifted by pushing the push block 705.

[0048] As an embodiment of the present invention, refer to Figure 5 , Figure 6 and Figure 7The outer wall of the fixed shell 601 is connected with a slider assembly 7, and the slider assembly 7 includes an arc-shaped slide groove 701, a fixed slide block 702, a movable slide block 703, a connecting plate 704 and a push block 705. The arc-shaped slide groove 701 is opened on both sides of the inner wall of the arc-shaped groove 501, the fixed slide block 702 is connected to the rear side of the fixed shell 601, and the movable slide block 703 is slidably connected to the rear side of the fixed slide block 702. The fixed slide block 702 and the movable slide block 703 are both connected to the arc-shaped slide groove 701, and the fixed slide block 702 and the movable slide block 703 are connected to the arc-shaped slide groove 701, so that a lateral supporting force is generated on the inner wall of the arc-shaped slide groove 701, so that the fixed table 5 is more stable when rotating, and the lateral stability during cutting is also improved, thereby reducing the error caused by vibration during cutting. The connecting plate 704 is connected to the movable slide block 703 At the bottom, the push block 705 is connected to the side of the connecting plate 704 close to the fixed shell 601, and the top is set as a bevel. The push block 705 passes through the inner wall of the fixed shell 601, and is connected with a sealing assembly 8 at the top. When the fixed platform 5 is reset or rotated, the fixed sliding block 702 first docks with the arc-shaped slide groove 701, and during the rotation process, it is connected with the movable sliding block 703, and squeezes the movable sliding block 703 to move closer to the fixed shell 601. During the process of approaching, the movable sliding block 703 pushes the push block 705 to move through the connecting plate 704, and pushes the movable block 803 to move upward through the push block 705, thereby ejecting the worm 602. The side wall of the movable sliding block 703 is set as a bevel, and the inclination angle is the same as the inclination angle of the bevel of the fixed sliding block 702, so that the arc-shaped slide groove 701 transitions from the fixed sliding block 702 to the movable sliding block 703 more smoothly.

[0049] As an embodiment of the present invention, refer to Figure 6 The top view cross section of the fixed sliding block 702 is set to a right-angled trapezoid, and the rear ends of the two fixed sliding blocks 702 are close to each other, reducing the width above the fixed sliding block 702 and the distance between the ends of the two fixed sliding blocks 702, so that the fixed platform 5 is easier to dock with the arc-shaped slide groove 701 when it is separated from the fixed shell 601 and then reset.

[0050] As an embodiment of the present invention, refer to Figure 8 A cover plate assembly 9 is connected above the fixed table 5, and the cover plate assembly 9 includes a front cover plate 901 and a side cover plate 902. The front cover plate 901 is located at the opening of the arc groove 501, and the side cover plate 902 is located at the opening of the arc slide groove 701 and is located below the front cover plate 901. The front cover plate 901 and the side cover plate 902 can rotate up and down. The width of the side cover plate 902 is equal to the width of the arc slide groove 701, and the width of the front cover plate 901 is equal to the width of the arc groove 501. The openings of the arc groove 501 and the arc slide groove 701 are blocked by the front cover plate 901 and the side cover plate 902, thereby preventing waste chips from entering the arc slide groove 701 during the cutting process, which causes the friction of the fixed table 5 to increase when it rotates.

[0051] As an embodiment of the present invention, refer to Figure 8 A slot 903 is provided on the top of the front cover 901, and the slot 903 is aligned with the side cover 902. The width of the slot 903 is greater than the distance between the ends of the two fixed sliders 702. A protrusion 904 is connected to the bottom of the front cover 901, and the protrusion 904 is connected to the top of the side cover 902. When the fixed shell 601 is reset after being separated from the fixed platform 5, the slot 903 is engaged with the side of the fixed slider 702 to push the front cover 901 to rotate, thereby avoiding the impact on the front side of the fixed slider 702 and the front cover 901.

[0052] Working principle: In order to prevent the rotating shaft from being easily deformed due to excessive torque when the workbench rotates to greater than or equal to 90 degrees, the original rotating shaft drive is changed to a worm gear 602 drive;

[0053] Specifically, the power device 2 drives the universal shaft 603 to rotate, and the rotation of the universal shaft 603 drives the worm 602 to rotate. When the worm 602 rotates, it meshes with the fixed teeth 502 to drive the fixed platform 5 to rotate. When it rotates to a certain angle and stops, the fixed platform 5 is fixed by the self-locking characteristics of the worm gear 602, thereby avoiding the fixing of the fixed platform 5 due to the stop of the universal rotating shaft, and further avoiding the rotating shaft from being deformed by excessive torque.

[0054] In order to avoid prolonged friction between the fixed teeth 502 and the worm 602 during the meshing process, which causes the worm 602 to heat up and affect its service life, balls 503 are installed on the front and rear sides of the fixed teeth 502. When the worm 602 is meshing with the fixed teeth 502, the rolling friction between the balls 503 and the worm 602 replaces the sliding friction between the fixed teeth 502 and the worm 602, thereby reducing the friction between the fixed teeth 502 and the worm 602. In order to improve the force-bearing capacity, a spiral groove 604 is opened on the inner wall of the worm 602 to connect with the ball 503. When the ball 503 rolls inside the spiral groove 604, the inner wall of the groove covers the outer wall of the ball 503, changing the point contact tangent to the ball 503 to surface contact, thereby increasing the force-bearing area of ​​the ball 503 during meshing, thereby improving the force-bearing capacity.

[0055] When the fixed platform 5 rotates to 90 degrees or more, one or both of the worm gears 602 will separate from the fixed teeth 502. In order to avoid excessive impact force between the fixed teeth 502 and the worm gear 602 during rotation or resetting, the movable teeth 504 are hinged on the front and rear sides of the inner wall of the arc groove 501 through a torsion spring. When the fixed platform 5 rotates, the worm gear 602 first meshes with the movable teeth 504. The impact force during meshing pushes the movable teeth 504 to rotate, thereby reducing the impact force between the movable teeth 504 and the worm gear 602.

[0056] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A five-axis rotary CNC machining center, comprising a main body (1), a power device (2), a rotary arm (3) and a moving platform (4), characterized in that: The invention also comprises a fixed platform (5) and a transmission assembly (6), wherein the fixed platform (5) is connected between the two rotating arms (3), the cross section of the fixed platform (5) is set to be arc-shaped, an arc-shaped groove (501) is opened below the fixed platform (5), and a fixed tooth (502) is connected to the upper part of the inner wall of the arc-shaped groove (501), and the transmission assembly (6) comprises a fixed shell (601), a worm (602) and a universal shaft (603), and a plurality of the fixed shells (601) are connected to the upper part of the moving platform (4) in a front-to-rear symmetrical manner with respect to the power device (2), and the worm (602) is connected to the upper part of the moving platform (4). The worm (602) is meshed with the fixed teeth (502), and the universal shaft (603) is connected between the two worms (602). A plurality of universal shafts (603) and the worm (602) are connected in series to form a multi-segment line shape tangent to the bottom of the fixed platform (5). The universal shaft (603) is driven to rotate by the power device (2). When the universal shaft (603) rotates, the worm (602) is driven to rotate, and the fixed platform (5) is driven to rotate by the meshing of the worm (602) and the fixed teeth (502).

2. A five-axis rotary CNC machining center according to claim 1, characterized in that: The fixed teeth (502) are connected to balls (503) at both the front and rear sides, and the balls (503) are tangent to the inner wall of the worm (602).

3. A five-axis rotary CNC machining center according to claim 2, characterized in that: The inner wall of the worm (602) is provided with a spiral groove (604), and the spiral groove (604) is in contact with the outer wall of the ball (503).

4. A five-axis rotary CNC machining center according to claim 1, characterized in that: The front and rear sides of the arc-shaped groove (501) are both hinged with movable teeth (504), and the movable teeth (504) are meshed with the worm (602).

5. The five-axis rotary CNC machining center according to claim 1, characterized in that: The outer wall of the fixed shell (601) is connected to a slider assembly (7), and the slider assembly (7) comprises an arc-shaped slide groove (701), a fixed slide block (702), a movable slide block (703), a connecting plate (704) and a push block (705). The arc-shaped slide groove (701) is arranged on both sides of the inner wall of the arc-shaped groove (501), the fixed slide block (702) is connected to the rear side of the fixed shell (601), the movable slide block (703) is slidably connected to the rear side of the fixed slide block (702), the fixed slide block (702) and the movable slide block (703) are both connected to the arc-shaped slide groove (701), the connecting plate (704) is connected to the bottom of the movable slide block (703), the push block (705) is connected to a side of the connecting plate (704) close to the fixed shell (601), and the top is a beveled edge, the push block (705) passes through the inner wall of the fixed shell (601), and the top is connected to a sealing assembly (8).

6. A five-axis rotary CNC machining center according to claim 5, characterized in that: The top view cross section of the fixed sliding block (702) is configured as a right-angle trapezoid, and the rear ends of the two fixed sliding blocks (702) are close to each other.

7. A five-axis rotary CNC machining center according to claim 6, characterized in that: The side wall of the movable slider (703) is configured as a bevel, and the bevel angle is the same as the bevel angle of the fixed slider (702).

8. The five-axis rotary CNC machining center according to claim 5, characterized in that: The sealing assembly (8) is connected to the top of the fixed shell (601), and the sealing assembly (8) comprises a sealing plate (801), a telescopic rod (802) and a moving block (803). The sealing plate (801) is hinged to the top of the fixed shell (601), and the two moving blocks (803) are slidably connected to the inner wall of the fixed shell (601) and are respectively connected to the two ends of the worm (602). The telescopic rod (802) is hinged between the sealing plate (801) and the moving block (803), and the moving block (803) is connected to the push block (705) at the bottom.

9. A five-axis rotary CNC machining center according to claim 1, characterized in that: A cover plate assembly (9) is hingedly connected above the fixed platform (5), and the cover plate assembly (9) comprises a front cover plate (901) and a side cover plate (902). The front cover plate (901) is located at the opening of the arc-shaped groove (501), and the side cover plate (902) is located at the opening of the arc-shaped slide groove (701) and below the front cover plate (901). The width of the side cover plate (902) is equal to the width of the arc-shaped slide groove (701), and the width of the front cover plate (901) is equal to the width of the arc-shaped groove (501).

10. A five-axis rotary CNC machining center according to claim 9, characterized in that: A card slot (903) is provided above the front cover plate (901), and the card slot (903) is aligned with the side cover plate (902), the width of the card slot (903) is greater than the distance between the ends of the two fixed sliders (702), and a protrusion (904) is connected below the front cover plate (901), and the protrusion (904) is connected to the top of the side cover plate (902).

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