Numerically controlled machine tool for machining spheroidal graphite elements

Abstract

The application provides a numerical control machining tool for machining spherical graphite elements, and belongs to the technical field of tool manufacturing. The numerical control machining tool for machining spherical graphite elements comprises an outer protection, a tool main machine, an inner protection, and is divided into a machining area and a non-machining area. The tool main machine comprises a flat bed body, a double-spindle system, a double-feeding system, a double-servo tool rest, a double-servo tailstock, a double-bowl workpiece clamping device, a reversible material receiving box and a discharging mechanism, and a three-stage dust removal device. The application can realize the machining of spherical graphite elements on one tool. The tool has the characteristics of firm workpiece clamping, accurate workpiece positioning, guarantee of fuel-free area thickness of finished products meeting relevant technical requirements, high production efficiency, good sealing performance, recyclable cutting chips and the like.

Description

Technical Field

[0001] This invention belongs to the field of machine tool manufacturing technology, specifically relating to a CNC machining tool for processing spherical graphite components. Background Technology

[0002] Spherical graphite elements are a type of nuclear fuel used in high-temperature gas-cooled reactors. A spherical graphite element mainly consists of a fuel zone and a non-fuel zone. The fuel zone is formed by pressing coated particles and matrix graphite powder, while the non-fuel zone is formed by pressing matrix graphite powder. The fuel zone is located at the center of the spherical element. The spherical graphite element blank has risers, with the riser direction being axial and the direction perpendicular to the riser being radial. The axial diameter is approximately 1 mm larger than the radial diameter, and the blank diameter is approximately 65 mm. The spherical graphite element blank requires turning machining, and the finished part has a diameter of approximately 60 mm. The dimensions, surface quality, and non-fuel zone thickness of the machined spherical element must meet relevant technical requirements. Chips generated during the machining process must be collected by a dust collection device.

[0003] Existing machine tools for processing spherical graphite components use vacuum chucks to pick up the spherical graphite components, requiring two machine tools to complete the processing of spherical graphite components, resulting in low production efficiency. In addition, the following problems exist: the surface roughness of the spherical graphite component blank cannot be guaranteed, resulting in insecure clamping; the vacuum chuck can also suck in dust, causing pipeline blockage; the thickness of the finished part is uneven from the outer circle to the fuel-free zone; graphite dust can easily enter the moving parts such as the machine tool guide rails, lead screws, tailstock center shafts, etc., leading to machine tool failure. Summary of the Invention

[0004] To address the above problems, the present invention provides a CNC machining tool for processing spherical graphite components.

[0005] The technical solution adopted in this invention is as follows:

[0006] A CNC machine tool for processing spherical graphite components includes an outer guard, a machine tool host, and an inner guard; the outer guard, inner guard, and machine tool host divide the entire machine tool into a processing area and a non-processing area;

[0007] The machine tool host includes a flat bed, a dual spindle system, a dual feed system and dual servo tool post, dual servo tailstock, two sets of dual bowl-shaped workpiece clamping devices, two sets of reversible receiving boxes and unloading mechanisms, and two sets of three-stage dust removal devices.

[0008] The dual-spindle system consists of two headstocks fixed side-by-side on the bed, with the electric spindles installed inside the headstocks and the two electric spindles running parallel to each other.

[0009] The dual-feed system and dual-servo tool post: The dual-feed system includes two sets of X-axis feed mechanisms and Z-axis feed mechanisms; In the X-axis feed mechanism, ball screw II is fixed to the bed through motor mount II and bearing mount I, nut II is connected to the saddle, servo motor II is mounted on motor mount II, and servo motor II is connected to ball screw II through coupling II, rolling guide rail I is fixed to the bed, and the saddle is connected to guide rail slider I. Servo motor II drives the saddle and slide rail on the bed along the rolling guide rail I in the X-axis direction through ball screw II and nut II. Movement; the Z-axis feed mechanism, the ball screw III is fixed to the saddle via motor seat III and bearing seat II, the screw nut III is connected to the slide plate, the servo motor III is mounted on motor seat III, the servo motor III is connected to the ball screw III via coupling III, the rolling guide rail III is fixed to the slide plate, the guide rail slider III is fixed to the saddle, the servo motor III drives the slide plate to move along the Z-axis direction on the saddle via the rolling guide rail III and guide rail slider III through the ball screw III and screw nut III; the dual servo tool post is mounted on the slide plate;

[0010] The dual-servo tailstock is fixed to the other end of the flat bed opposite the electric spindle via a bent plate I, ensuring that the center spindle is coaxial with the electric spindle. A bowl-shaped center is installed at the front end of the center spindle, which is installed inside the center sleeve. The center sleeve is fixed to the guide rail slider connector, which is connected to the screw nut I. The guide rail slider connector is fixed to the guide rail slider II, the rolling guide rail II is fixed to the bent plate I, the motor base I is fixed to the bent plate I, the ball screw I is installed on the motor base I, and the servo motor I is fixed to the motor base I. The servo motor I drives the ball screw I via the coupling I, which in turn drives the center spindle to move along the Z-axis direction on the rolling guide rail II via the screw nut I. One end of the circular elastic sewn bellows is connected to the center spindle, and the other end is connected to the tailstock body, thus sealing the dual-servo tailstock.

[0011] The double-bowl-shaped workpiece clamping device includes a bowl-shaped positioning shaft installed at the front end of the electric spindle and a bowl-shaped tip installed at the front end of the tip shaft. Rubber is lined inside the bowl-shaped positioning shaft and the bowl-shaped tip. The dual servo tailstock clamps the spherical graphite element through the bowl-shaped tip.

[0012] The flip-up receiving box and unloading mechanism are installed below the workpiece processing area. The flip-up receiving box has a grate plate with high sides and a concave middle. The receiving box is fixed to the headboard with screws via a curved plate II. A dust suction pipe is connected to one side of the receiving box, and the chips falling into the receiving box are sucked into the dust bin. The receiving box is tilted 15° to the lower end, and a hopper is set below the receiving box. The hopper is fixed to the flat bed by a bracket. The bottom opening of the hopper is connected to the unloading channel. After the finished part falls onto the grate plate of the receiving box, it rolls to the lower end, causing the receiving box to flip. The finished part falls into the unloading hopper and then rolls into the material basket through the unloading channel.

[0013] The three-stage dust removal device consists of two stages: the first stage is for dust removal in the cutting zone, which employs a dust suction and protection chamber for the processing area. The chamber wall has a double-layer structure, creating negative pressure inside. The inner layer of the chamber wall is filled with... The first stage is dust removal in the processing area, with the dust collection and protection chamber located above the receiving box. The processing area dust collection and protection chamber is connected to the curved plate II by screws, and a dust collection pipe is connected to one side of the processing area dust collection and protection chamber. The second stage is dust removal in the receiving area, with the receiving box and the processing area dust collection and protection chamber connected to the dust collection pipe on the same side. The third stage of dust removal is dust collection port II on the top of the outer protection and dust collection port I on the lower part of the flat bed. Dust collection port I and dust collection port II are connected to an industrial dust collector installed outside the machine tool.

[0014] The internal protection consists of: X-axis feed mechanism protection I, one end of which is fixed to the saddle and the other end connected to the outer protection; X-axis feed mechanism protection II, one end of which is fixed to the saddle and the other end connected to the headstock; Z-axis feed mechanism protection, one end of which is fixed to the slide plate and the other end connected to the outer protection; a connecting protective plate connected to the outer protection; a headstock upright plate protecting the dual-spindle system; the right-side armor protective cover of the dual-servo tool post, one end of which is fixed to the headstock upright plate and the other end of which is fixed to the protective fixing plate of the dual-servo tool post; the left-side armor protective cover of the dual-servo tool post, one end of which is fixed to the protective fixing plate of the dual-servo tool post and the other end connected to the outer protection; and a square sandwiched bellows, one end of which is connected to the protective fixing plate of the dual-servo tool post and the other end of which is connected to the dual-servo tool post and the slide plate.

[0015] The dual-servo tailstock has a ball center coordinate feedback function after the workpiece is clamped.

[0016] The receiving box has a limit at its lower end and is heavier at its upper end than at its lower end, ensuring that the receiving box has the necessary flipping torque for reset.

[0017] The X-axis feed mechanism protection I, X-axis feed mechanism protection II, and Z-axis feed mechanism protection are accordion-style protective covers.

[0018] The circular elastic sewn-in bellows and the square interlayer bellows are made of Valmec Eco 600.

[0019] The right and left armor protective covers are leather pleats with armor plates.

[0020] The beneficial effects of this invention are as follows:

[0021] 1. The machine tool of this invention adopts a main machine tool structure with a flat bed, dual spindle system, dual feed system, dual servo tool post, and dual servo tailstock. It employs a double-bowl-shaped workpiece clamping device, a reversible receiving box and unloading mechanism, and a three-stage dust removal system. This allows for the processing of spherical graphite components using a single machine tool, improving production efficiency and enabling the recycling and reuse of chips. Furthermore, it can be easily configured with automatic blank and finished part inspection systems and automatic feeding systems to form an automated production line for spherical graphite components.

[0022] 2. This invention employs a dual servo tailstock, enabling rapid clamping with adjustable clamping force. It also features workpiece sphere center coordinate feedback, allowing for sphere center position compensation during turning and resolving the issue of uneven thickness in the unfueled area of ​​the finished part.

[0023] 3. The present invention uses two sets of double-bowl-shaped workpiece clamping devices, which solves the problems of unstable workpiece clamping due to the inability to guarantee the surface roughness of the blank and the blockage of pipeline caused by dust sucked in by the vacuum suction cup.

[0024] 4. This invention employs two sets of three-stage dust removal devices. The first stage removes dust from the cutting zone, and the dust collection and protection chamber wall in the processing zone adopts a double-layer structure, creating negative pressure inside. The inner layer of the chamber wall is filled with... The first stage of dust removal involves a small hole that sucks away dust generated during the cutting process; the second stage involves dust removal in the receiving area, where a dust collection pipe is connected to the receiving box, creating negative pressure inside, causing the chips generated during cutting to fall into the receiving box and be sucked away; the third stage involves dust collection ports located inside the machine tool's external protection and under the flatbed, where dust flying out of the cutting area or falling into the lower part of the machine tool, along with chips, are sucked into the dust bin, achieving chip recycling and reuse, and improving the production environment.

[0025] 5. In terms of machine tool protection, this invention effectively separates the machining area from the non-machining area and protects the moving parts of the machine tool. Bellows-style protective covers are installed on the X-axis and Z-axis moving parts of the machine tool feed system. The servo tailstock adopts a fixed tailstock body design, with components such as the ball screw and rolling guides enclosed within the tailstock body. The center shaft is sealed with a Valmec Eco600 circular elastic cavity seal, preventing dust damage to the components. Attached Figure Description

[0026] Figure 1 This is a structural diagram of a CNC machining tool for processing spherical graphite components, wherein (a) is an external protective diagram and (b) is a top view after removing the external protective cover.

[0027] Figure 2 This is a structural diagram of the machine tool main unit.

[0028] Figure 3 This is a structural diagram of the X-axis feed mechanism and the Z-axis feed mechanism.

[0029] Figure 4 This is an exploded view of the dual-servo tailstock structure.

[0030] Figure 5 This is a structural diagram of a dual-servo tailstock.

[0031] Figure 6 This is a structural diagram of a double-bowl-shaped workpiece clamping device.

[0032] Figure 7 This is a structural diagram of the flip-up receiving box and the feeding mechanism.

[0033] Figure 8 This is a structural diagram of the dust extraction and protection chamber in the processing area.

[0034] Figure 9 This is a structural diagram of a three-stage dust removal device.

[0035] Figure 10 This is a diagram of the internal protective structure.

[0036] Figure 11 This is a structural diagram of a machine tool main unit with a robotic arm and internal protection.

[0037] In the diagram: 1. Flat bed, 2. X-axis feed mechanism, 3. Saddle, 4. Z-axis feed mechanism, 5. Slide plate, 6. Dual servo tool post, 7. Electric spindle, 8. Headstock, 9. Spherical graphite element, 10. Servo motor III, 11. Rolling guide rail I, 12. X-axis feed mechanism protection I, 13. Z-axis feed mechanism protection, 14. Connecting protective plate, 15. Headstock, 16. Guide rail slider I, 17. Circular elastic sewn bellows, 18. Right side armor protective cover, 19. 20. Square sandwiched bellows, 21. Protective fixing plate, 22. Left side armor protective cover, 23. Bowl-shaped positioning shaft, 24. Bowl-shaped tip, 25. Tip shaft, 26. Tip sleeve, 27. Rolling guide rail II, 28. Guide rail slider connector, 29. Guide rail slider II, 30. Nut I, 31. Coupling I, 32. Servo motor I, 33. Tailstock body, 34. Bending plate I, 35. Discharge channel, 36. Discharge hopper, 37. Receiving box, 38. Bending plate II, 39. Dust suction pipe, 30. 9. Dust extraction and protection chamber in the processing area; 40. Ball screw I; 41. Motor mount I; 42. Dust collection port I; 43. Dust collection port II; 44. Industrial dust collector; 45. Gantry robot I; 46. Gantry robot II; 47. X-axis feed mechanism protection II; 48. Bearing housing I; 49. Ball screw II; 50. Nut II; 51. Motor mount II; 52. Coupling II; 53. Servo motor II; 54. Guide rail slider III; 55. Rolling guide rail III; 56. 57. Bearing housing II; 58. Ball screw III; 59. Nut III; 60. Motor housing III; 61. Coupling III; 62. Outer protection; 63. Inner protection; 64. Non-machining area; 65. Machining area; 66. Machine tool host; 67. Reversible receiving box and unloading mechanism; 68. Double bowl-shaped workpiece clamping device; 69. Double servo tailstock; 60. Three-stage dust removal device; 61. Dual spindle system; 62. Dual feed system. Detailed Implementation

[0038] The embodiments of the present invention will be further described below with reference to the accompanying drawings:

[0039] like Figures 1-11 As shown, a CNC machining tool for processing spherical graphite components is implemented in the following manner:

[0040] A CNC machine tool for processing spherical graphite components includes an outer guard 61, a machine tool host 63, and an inner guard 62; the outer guard 61, the inner guard 62, and the machine tool host 63 divide the entire machine tool into a processing area 62-2 and a non-processing area 62-1.

[0041] The structure of the machine tool host 63 includes a flat bed 1, a dual spindle system 63-5, a dual feed system 63-6 and a dual servo tool post 6, a dual servo tailstock 63-3, two sets of double bowl-shaped workpiece clamping devices 63-2, two sets of flip-up receiving boxes and unloading mechanisms 63-1, and two sets of three-stage dust removal devices 63-4.

[0042] The structure of the dual spindle system 63-5 is that two headstocks 8 are fixed side by side on the flat bed 1, and the electric spindles 7 are installed inside the headstocks 8, with the two electric spindles 7 parallel to each other.

[0043] The dual feed system 63-6 and the dual servo tool post 6 are structured as follows: The dual feed system 63-6 includes two sets of X-axis feed mechanisms 2 and Z-axis feed mechanisms 4. The X-axis feed mechanism 2 is structured as follows: a ball screw II49 is fixed to the bed 1 via a motor mount II51 and a bearing mount I48; a nut II50 is connected to the saddle 3; a servo motor II53 is mounted on the motor mount II51 and connected to the ball screw II49 via a coupling II52; a rolling guide rail I11 is fixed to the bed 1; the saddle 3 is connected to the guide rail slider I16; and the servo motor II53 drives the saddle 3 and the slide plate 5 along the rolling guide rail I11 on the bed 1 via the ball screw II49 and the nut II50. The X-axis movement is as follows: The Z-axis feed mechanism 4 is structured as follows: a ball screw III57 is fixed on the saddle 3 via a motor mount III59 and a bearing mount II56; a nut III58 is connected to the slide plate 5; a servo motor III10 is mounted on a motor mount III59; the servo motor III10 is connected to the ball screw III57 via a coupling III60; a rolling guide rail III55 is fixed on the slide plate 5; a guide rail slider III54 is fixed on the saddle 3; the servo motor III10 drives the slide plate 5 to move along the Z-axis on the saddle 3 via the rolling guide rail III55 and the guide rail slider III54 through the ball screw III57 and the nut III58; and a dual servo tool post 6 is mounted on the slide plate 5.

[0044] The structure of the dual servo tailstock 63-3 is as follows: the dual servo tailstock 63-3 is fixed to the other end of the flat bed 1 opposite to the electric spindle 7 via a bending plate I33, ensuring that the center spindle 24 is coaxial with the electric spindle 7; the bowl-shaped center 23 is installed at the front end of the center spindle 24, the center spindle 24 is installed inside the center sleeve 25, the center sleeve 25 is fixed on the guide rail slider connector 27, the guide rail slider connector 27 is connected to the nut I29, the guide rail slider connector 27 is fixed on the guide rail slider II28, the rolling guide rail II26 is fixed on the bending plate I33, and the motor base I41 is fixed on the bending plate. On I33, the ball screw I40 is mounted on the motor base I41, and the servo motor I31 is fixed on the motor base I41. The servo motor I31 drives the ball screw I40 through the coupling I30, which in turn drives the center shaft 24 to move along the Z-axis direction on the rolling guide II26 via the nut I29. One end of the circular elastic sewing cavity 17 is connected to the center shaft 24, and the other end is connected to the tailstock body 32, realizing the sealing of the dual servo tailstock 63-3. The dual servo tailstock 63-3 also has the function of ball center coordinate feedback after the workpiece is tightened, ensuring that the thickness of the fuel-free zone of the finished part meets the relevant technical requirements.

[0045] The structure of the double-bowl-shaped workpiece clamping device 63-2 includes a bowl-shaped positioning shaft 22 installed at the front end of the electric spindle 7 and a bowl-shaped tip 23 installed at the front end of the tip shaft 24. Rubber is lined inside the bowl-shaped positioning shaft 22 and the bowl-shaped tip 23 to increase friction and prevent the workpiece from slipping during processing. The double servo tailstock 63-3 clamps the spherical graphite element 9 through the bowl-shaped tip 23.

[0046] The structure of the flip-up receiving box and unloading mechanism 63-1 is as follows: the flip-up receiving box and unloading mechanism 63-1 is installed below the workpiece processing area 62-2. The upper part of the flip-up receiving box 36 is a grate plate with high sides and a concave middle. The receiving box 36 is fixed to the headstock plate 15 with screws via a bent plate II 37. A dust suction pipe 38 is connected to one side of the receiving box 36, and the chips falling into the receiving box 36 are sucked into the dust bin by the dust suction pipe 38. The receiving box 36 is tilted 15 degrees towards the lower end. °, a feeding hopper 35 is provided below the receiving box 36. The feeding hopper 35 is fixed on the flat bed 1 by a bracket. The bottom opening of the feeding hopper 35 is connected to the feeding channel 34. After the finished part falls onto the grate of the receiving box 36, it rolls to the lower end, causing the receiving box 36 to flip. The finished part falls into the feeding hopper 35 and then rolls into the material basket through the feeding channel 34. The lower end of the receiving box 36 has a limit position, and the upper end of the receiving box 36 is heavier than the lower end, ensuring that the receiving box 36 has the flipping torque required for reset.

[0047] The structure of the three-stage dust removal device 63-4 is as follows: the first stage is for dust removal in the cutting area, which uses a dust suction and protection chamber 39 in the processing area. The chamber wall adopts a double-layer structure, and a negative pressure is formed inside. The inner layer of the chamber wall is filled with... The small hole and the dust collection and protection chamber 39 of the processing area are set above the receiving box 36. The dust collection and protection chamber 39 of the processing area is connected to the bending plate II 37 by screws. The dust collection and protection chamber 39 of the processing area is connected to the dust collection pipe 38 on one side, which can suck away the dust generated during the cutting process. The second stage is dust removal in the receiving area. The receiving box 36 and the dust collection and protection chamber 39 of the processing area are connected to the dust collection pipe 38 on the same side. Negative pressure is generated inside. The chips generated during the cutting process fall into the receiving box 36 and are sucked away by the dust collection pipe 38. The third stage of dust removal is that the top of the outer protection 61 is provided with a dust collection port II 43, and the lower part of the flat bed 1 is provided with a dust collection port I 42. The dust collection port I 42 and the dust collection port II 43 are connected to the industrial dust collector 44 outside the machine tool. The dust flying out of the cutting area or the dust and chips falling into the lower part of the machine tool are sucked into the dust chamber of the industrial dust collector 44.

[0048] The inner protection 62 has the following structure: one end of the X-axis feed mechanism protection I 12 is fixed to the saddle 3, and the other end is connected to the outer protection 61; one end of the X-axis feed mechanism protection II 47 is fixed to the saddle 3, and the other end is connected to the headstock 8; one end of the Z-axis feed mechanism protection 13 is fixed to the slide plate 5, and the other end is connected to the outer protection 61; the connecting protection plate 14 is connected to the outer protection 61; the headstock 15 protects the dual spindle system 63-5; one end of the right-side armor protection cover 18 of the dual servo tool post 6 is fixed to the headstock 15, and the other end is fixed to the dual servo tool post 63-5. On the protective fixing plate 20 of the servo tool holder 6, one end of the left armor protective cover 21 of the dual servo tool holder 6 is fixed to the protective fixing plate 20 of the dual servo tool holder 6, and the other end is connected to the outer protection 61. One end of the square sandwiched bellows 19 is connected to the protective fixing plate 20 of the dual servo tool holder 6, and the other end is connected to the dual servo tool holder 6 and the slide plate 5. The X-axis feed mechanism protection I 12, X-axis feed mechanism protection II 47 and Z-axis feed mechanism protection 13 are accordion-type protective covers. The circular elastic sewn bellows 17 and the square sandwiched bellows 19 are made of Valmec Eco 600. The right armor protective cover 18 and the left armor protective cover 21 are bellows with armor plates.

[0049] The processing procedure for the spherical graphite element of this invention is as follows:

[0050] Process ①: The spherical graphite element 9 blank is picked up by the in-machine gantry robot I45 and sent to the first electric spindle 7. It is clamped by the double cup-shaped workpiece clamping device 63-2. The cutting tool on the double servo tool post 6 cuts off the riser to the semi-finished part.

[0051] Process ②: Using the in-machine gantry robot II 46, the semi-finished part clamped by the first electric spindle 7 and processed in process ① is rotated 90° and moved to the second electric spindle 7. The machined surface is clamped by the double cup-shaped workpiece clamping device 63-2, and the cutting tool on the double servo tool post 6 processes the remaining part to the finished part, namely the spherical graphite element 9.

[0052] The dual-servo tailstock 63-3 can achieve rapid clamping with adjustable clamping force. It can also perform ball center position compensation turning through ball center coordinate feedback to ensure that the thickness of the fuel-free zone meets relevant technical requirements.

[0053] After the finished spherical graphite element 9 is processed, it falls onto the grate plate of the receiving box 36 by gravity and rolls towards the lower end, causing the receiving box 36 to flip. The finished part falls into the feed hopper 35 and then rolls into the material basket of the automatic line feed channel through the feed channel 34. The chips generated during the processing are sucked into the dust bin by the industrial dust collector 44 through a three-stage dust removal device.

Claims

1. A CNC machine tool for processing spherical graphite components, characterized in that, The CNC machining tool for processing spherical graphite components includes an outer guard (61), a machine tool host (63), and an inner guard (62); the outer guard (61), the inner guard (62), and the machine tool host (63) divide the entire machine tool into a processing area (62-2) and a non-processing area (62-1); The machine tool host (63) includes a flat bed (1), a dual spindle system (63-5), a dual feed system (63-6), a dual servo tool post (6), a dual servo tailstock (63-3), two sets of double cup-shaped workpiece clamping devices (63-2), two sets of flip-up receiving boxes and unloading mechanisms (63-1), and two sets of three-stage dust removal devices (63-4). The dual spindle system (63-5): two headstocks (8) are fixed side by side on the flat bed (1), and electric spindles (7) are installed inside the headstocks (8), with the two electric spindles (7) being parallel; The dual feed system (63-6) and dual servo tool post (6): The dual feed system (63-6) includes two sets of X-axis feed mechanisms (2) and Z-axis feed mechanisms (4); The X-axis feed mechanism (2) has a ball screw II (49) fixed on the bed (1) via a motor mount II (51) and a bearing mount I (48), a screw nut II (50) connected to the saddle (3), a servo motor II (53) mounted on a motor mount II (51), and a servo motor II (53) connected to the ball screw II (49) via a coupling II (52), a rolling guide rail I (11) fixed on the bed (1), and a saddle (3) connected to a guide rail slider I (16). The servo motor II (53) drives the saddle (3) and the slide plate (5) on the bed (1) along the rolling guide rail I (11) via the ball screw II (49) and screw nut II (50). 1) Moving in the X-axis direction; the Z-axis feed mechanism (4), the ball screw III (57) is fixed on the saddle (3) through the motor seat III (59) and bearing seat II (56), the screw nut III (58) is connected to the slide plate (5), the servo motor III (10) is mounted on the motor seat III (59), the servo motor III (10) is connected to the ball screw III (57) through the coupling III (60), the rolling guide rail III (55) is fixed on the slide plate (5), the guide rail slider III (54) is fixed on the saddle (3), the servo motor III (10) drives the slide plate (5) to move along the Z-axis direction on the saddle (3) through the rolling guide rail III (55) and the guide rail slider III (54) via the ball screw III (57) and screw nut III (58); the dual servo tool post (6) is mounted on the slide plate (5); The dual servo tailstock (63-3) is fixed to the other end of the flat bed (1) opposite to the electric spindle (7) by a bending plate I (33), ensuring that the center spindle (24) is coaxial with the electric spindle (7); the bowl-shaped center (23) is installed at the front end of the center spindle (24), the center spindle (24) is installed inside the center sleeve (25), the center sleeve (25) is fixed on the guide rail slider connector (27), the guide rail slider connector (27) is connected to the nut I (29), the guide rail slider connector (27) is fixed on the guide rail slider II (28), and the rolling guide rail II (26) is fixed on the guide rail II (28). On the bending plate I (33), the motor base I (41) is fixed on the bending plate I (33), the ball screw I (40) is installed on the motor base I (41), the servo motor I (31) is fixed on the motor base I (41), the servo motor I (31) drives the ball screw I (40) through the coupling I (30) to drive the center shaft (24) to move along the Z-axis direction on the rolling guide II (26) via the nut I (29); one end of the circular elastic sewn bellows (17) is connected to the center shaft (24), and the other end is connected to the tailstock body (32) to seal the double servo tailstock (63-3); The double-bowl-shaped workpiece clamping device (63-2) includes a bowl-shaped positioning shaft (22) installed at the front end of the electric spindle (7) and a bowl-shaped tip (23) installed at the front end of the tip shaft (24). The bowl-shaped positioning shaft (22) and the bowl-shaped tip (23) are lined with rubber. The double servo tailstock (63-3) clamps the spherical graphite element (9) through the bowl-shaped tip (23). The flip-up receiving box and unloading mechanism (63-1) is installed below the workpiece processing area (62-2). The flip-up receiving box (36) has a grate plate with high sides and concave middle on the upper part. The receiving box (36) is fixed to the headboard (15) with screws through the bending plate II (37). A dust suction pipe (38) is connected to one side of the receiving box (36) to suck the chips that fall into the receiving box (36) to the dust bin through the dust suction pipe (38). The receiving box (36) is tilted 15° to the lower end. A feeding hopper (35) is set below the receiving box (36). The feeding hopper (35) is fixed on the flat bed (1) by a bracket. The bottom opening of the feeding hopper (35) is connected to the feeding channel (34). After the finished part falls onto the grate of the receiving box (36), it rolls to the lower end, causing the receiving box (36) to flip. The finished part falls into the feeding hopper (35) and then rolls into the material basket through the feeding channel (34). The three-stage dust removal device (63-4) consists of two stages: the first stage is for dust removal in the cutting zone, which uses a dust suction and protection chamber (39) in the processing zone. The chamber wall has a double-layer structure, creating a negative pressure inside. The inner layer of the chamber wall is filled with... The small hole and the dust collection protection chamber (39) of the processing area are set above the receiving box (36). The dust collection protection chamber (39) of the processing area is connected to the bending plate II (37) by screws. The dust collection pipe (38) is connected to one side of the dust collection protection chamber (39). The second stage is dust removal in the receiving area. The receiving box (36) and the dust collection protection chamber (39) of the processing area are connected to the dust collection pipe (38) on the same side. The third stage of dust removal is that the top of the outer protection (61) is provided with dust removal port II (43), and the bottom of the flat bed (1) is provided with dust removal port I (42). Dust removal port I (42) and dust removal port II (43) are connected to the industrial dust collector (44) outside the machine tool. The inner protection (62): one end of the X-axis feed mechanism protection I (12) is fixed on the saddle (3), and the other end is connected to the outer protection (61); one end of the X-axis feed mechanism protection II (47) is fixed on the saddle (3), and the other end is connected to the headstock (8); one end of the Z-axis feed mechanism protection (13) is fixed on the slide plate (5), and the other end is connected to the outer protection (61); the connecting protection plate (14) is connected to the outer protection (61); the headstock plate (15) protects the dual spindle system (63-5); dual servo One end of the right-side armored protective cover (18) of the tool holder (6) is fixed to the headboard (15), and the other end is fixed to the protective fixing plate (20) of the dual-servo tool holder (6). One end of the left-side armored protective cover (21) of the dual-servo tool holder (6) is fixed to the protective fixing plate (20) of the dual-servo tool holder (6), and the other end is connected to the outer protection (61). One end of the square sandwich bellows (19) is connected to the protective fixing plate (20) of the dual-servo tool holder (6), and the other end is connected to the dual-servo tool holder (6) and the slide plate (5).

2. The CNC machine tool for processing spherical graphite components according to claim 1, characterized in that, The dual servo tailstock (63-3) has a ball center coordinate feedback function after the workpiece is clamped.

3. A CNC machine tool for processing spherical graphite components according to claim 1, characterized in that, The receiving box (36) has a limit at the lower end and is heavier at the higher end than at the lower end, ensuring that the receiving box (36) has the flipping torque required for reset.

4. A CNC machining tool for processing spherical graphite components according to claim 1, characterized in that, The X-axis feed mechanism protection I (12), X-axis feed mechanism protection II (47) and Z-axis feed mechanism protection (13) are accordion-type protective covers.

5. A CNC machine tool for processing spherical graphite components according to claim 1, characterized in that, The circular elastic sewn-in septum (17) and the square interlayer septum (19) are made of Valmec Eco 600.

6. A CNC machine tool for processing spherical graphite components according to claim 1, characterized in that, The right-side armor protective shield (18) and the left-side armor protective shield (21) are leather cavities with armor plates.

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