Marine ultra-long rudder shaft high-precision numerical control heavy horizontal milling lathe

Abstract

The utility model discloses a high-precision numerical control heavy horizontal milling lathe for a marine super-long rudder shaft, and belongs to the technical field of numerical control machine tools. A C-axis assembly is arranged on the upper portion of a spindle box of the heavy horizontal lathe, and a drilling and milling cutter frame is arranged on a lathe body. The C-axis assembly and the drilling and milling cutter support are connected with a hydraulic system and a numerical control system of the machine tool, the C-axis assembly comprises a C-axis transmission mechanism and a C-axis clamping mechanism, the C-axis transmission mechanism adopts a double-servo motor to perform master-slave control to eliminate backlash and is composed of a C-axis box body, a double-servo motor, a speed reducer, a gear transmission chain and a pinion, the C-axis box body is installed at the top of the spindle box, and the pinion is installed on the spindle box. A servo motor and a speed reducer are installed on the upper portion of a C-shaft box body together, torque is transmitted to a pinion through a gear transmission chain, the pinion is meshed with a large gear ring in a main shaft box to drive a main shaft to rotate for indexing, when C-shaft assembly indexing is needed, a gear shifting mechanism in the main shaft box needs to slide a gear to the meshed position, and after indexing is completed, the main shaft is driven to rotate. And the C-axis clamping mechanism is controlled by a hydraulic system to automatically work to clamp the side wall of the disc chuck.

Description

Technical Field

[0001] The utility model relates to a high-precision CNC heavy-duty horizontal milling lathe for an extra-long rudder shaft for a ship, and belongs to the technical field of CNC machine tools. Background Art

[0002] A precision machining machinery factory needs a machine tool to solve the precision turning, high-precision drilling and milling of extra-long rudder shafts for ships. Currently, there is no professional equipment to solve this problem. It is necessary to have one device that can meet the processing requirements of high-torque turning, precise indexing, precision turning, precision milling, workpiece support, etc. Utility Model Content

[0003] In order to solve the deficiencies of the above-mentioned prior art, the utility model provides a high-precision CNC heavy-duty horizontal milling lathe for super-long ship rudder shafts. The device is used for precision turning and high-precision drilling and milling of super-long ship rudder shafts to meet the use requirements.

[0004] The technical solution adopted by the utility model to solve its technical problems is: a high-precision CNC heavy-duty horizontal milling lathe for super-long rudder shaft for ships, comprising a main motor, a spindle box, a faceplate, a bed, a turning tool rest, a slide box, a hydrostatic center frame, a tailstock, a hydraulic system, a CNC system, etc. The equipment adopts an integral three-guide rail structure, which is divided into a tool rest guide rail and a workpiece guide rail. The main motor and the spindle box are arranged at the left end of the bed, and the turning tool rest, the hydrostatic center frame and the tailstock are placed on the guide rail of the workpiece bed. A slide box is arranged between the turning tool rest and the bed, and the faceplate is located on the right side of the spindle box. The hydraulic system and the CNC system of the machine tool are connected with the main motor, the spindle box, the turning tool rest and the hydrostatic center frame, wherein a C-axis assembly is arranged on the upper part of the spindle box. A drilling and milling tool holder is provided on the bed; the C-axis assembly includes a C-axis transmission mechanism and a C-axis clamping mechanism. The C-axis transmission mechanism adopts the dual-servo motor master-slave control anti-backlash principle. The C-axis transmission mechanism consists of a C-axis box, dual servo motors, a reducer, a gear transmission chain, and a pinion. The C-axis box is installed on the top of the spindle box, and the servo motor is installed together with the reducer to the upper part of the C-axis box. The torque is transmitted to the pinion through the gear transmission chain. The pinion engages with the large gear ring inside the spindle box to drive the spindle to rotate and index. When the C-axis assembly needs to be indexed, the shifting mechanism in the spindle box needs to slide the gear to the meshing position. After the indexing is completed, the C-axis clamping mechanism is controlled by the hydraulic system to start working automatically to clamp the side wall of the faceplate.

[0005] Furthermore, the drilling and milling tool holder is composed of a large tool holder, a rotary tool holder, an upper tool holder, a left tool plate, and a right drilling and milling device. The large tool holder is installed on the upper part of the bed, the rotary tool holder is installed on the upper part of the large tool holder, and the upper tool holder is installed on the upper part of the rotary tool holder. The rotary tool holder is used to realize manual rotation of ±90°. The left tool plate is arranged on the left side of the upper tool holder, and the right drilling and milling device is arranged on the right side of the upper tool holder. The drilling and milling tool holder is connected to the hydraulic system and the numerical control system of the machine tool.

[0006] The beneficial effects of the utility model are as follows: by adopting a conventional CNC heavy-duty horizontal lathe as the basis, changing part of the transmission principle, changing the electrical control principle, adopting a large torque turning spindle box, a precisely indexed C-axis box, a precision turning tool holder, a precision milling tool holder, a static pressure center frame for workpiece support and a high-precision tailstock to meet processing requirements, adding a C-axis assembly and a drilling and milling tool holder assembly to realize the compounding of the machine tool and improve processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0008] Figure 1 It is a structural schematic diagram of the utility model.

[0009] Figure 2 This is a structural sectional view of the C-axis assembly of the utility model.

[0010] Figure 3 This is a schematic diagram of the structure of the C-axis assembly of the utility model installed on the spindle box.

[0011] Figure 4 It is a structural schematic diagram of the drilling and milling tool holder of the utility model.

[0012] Figure 5 It is a side view of the drilling and milling tool holder of the utility model.

[0013] Numbers in the figure:

[0014] 1. Main motor, 2. Spindle box, 3. C-axis assembly, 4. Faceplate, 5. Bed, 6. Turning tool holder, 7. Slide box, 8. Drilling and milling tool holder, 9. Static pressure center frame, 10. Tail stock, 11. C-axis clamping mechanism, 12. C-axis box, 13. Dual servo motors, 14. Reducer, 15. Gear transmission chain, 16. Shift mechanism, 17. Pinion, 18. Tool holder, 19. Rotary tool holder, 20. Upper tool holder, 21. Left tool plate, 22. Right drilling and milling device, 23. Spindle motor, 24. Double-speed reducer, 25. Synchronous pulley assembly, 25. Drilling and milling spindle. DETAILED DESCRIPTION

[0015] like Figure 1-5As shown, a high-precision CNC heavy-duty horizontal milling and turning machine for extra-long rudder shafts for ships comprises a main motor 1, a spindle box 2, a faceplate 4, a bed 5, a turning tool rest 6, a slide box 7, a hydrostatic center frame 9, a tailstock 10, a hydraulic system, a CNC system and the like. The equipment adopts an integral three-guide rail structure, which is divided into a tool rest guide rail and a workpiece guide rail. The main motor 1 and the spindle box 2 are arranged on the left end of the bed 5, and the turning tool rest 6, the hydrostatic center frame 9 and the tailstock 10 are placed on the guide rail of the workpiece bed 5. A slide box 7 is arranged between the turning tool rest 6 and the bed 5, and the faceplate 4 is located on the right side of the spindle box 2. The hydraulic system and the CNC system of the machine tool are connected with the main motor 1, the spindle box 2, the turning tool rest 6 and the hydrostatic center frame 9.

[0016] In order to meet the processing requirements of large torque turning, precise indexing, precision turning, precision milling, workpiece support, etc., a C-axis assembly 3 is provided on the top of the spindle box 2, and a drilling and milling tool holder 8 is provided on the bed 5; the C-axis assembly 3 includes a C-axis transmission mechanism and a C-axis clamping mechanism 11. The C-axis transmission mechanism adopts the master-slave control anti-backlash principle of dual servo motors. The C-axis transmission mechanism consists of a C-axis box 12, dual servo motors 13, a reducer 14, a gear transmission chain 15, and a pinion 17. It adopts the master-slave control anti-backlash principle of dual servo motors, which is the highest indexing accuracy and the most reliable in the current mechanical field. The C-axis housing 12 is installed on the top of the spindle box 2, and the servo motor 13 is installed together with the reducer 14 on the upper part of the C-axis housing 12. The torque is transmitted to the pinion 17 through the gear transmission chain 15. The pinion 17 engages with the large gear ring inside the spindle box 2 to drive the spindle to rotate and index. When the C-axis assembly 3 needs to be indexed, the shift mechanism 16 in the spindle box 2 needs to slide the gear to the meshing position. After the indexing is completed, the C-axis clamping mechanism 11 is controlled by the hydraulic system to start working automatically, clamping the side wall of the disc 4, and keeping the workpiece stable before drilling and milling.

[0017] The drilling and milling tool holder 8 is composed of a large tool holder 18 , a rotary tool holder 19 , an upper tool holder 20 , a left tool plate 21 , and a right drilling and milling device 22 . The large tool rest 18 is installed on the upper part of the bed 5 to complete the movement of the tool rest Z axis parallel to the bed direction. The rotary tool rest 19 is installed on the upper part of the large tool rest 18 to complete the movement of the tool rest X axis perpendicular to the bed direction. The upper tool rest 20 is installed on the upper part of the rotary tool rest 19, and the manual rotation of ±90° is achieved through the rotary tool rest 19. The left tool plate 21 is arranged on the left side of the upper tool rest 20, and the right drilling and milling device 22 is arranged on the right side of the upper tool rest 20. The right drilling and milling device 22 consists of a spindle motor 23, a two-speed reducer 24, a synchronous pulley assembly 25, a drilling and milling spindle 26 and a drilling and milling spindle box. The spindle motor 23 is connected to the two-speed reducer 24 and fixed outside the drilling and milling spindle box. The spindle motor 23 drives the drilling and milling spindle 26 inside the drilling and milling spindle box to rotate through the synchronous pulley assembly 25 in the drilling and milling spindle box. The structure is simple, mature and reliable. The drilling and milling tool rest 8 is connected to the hydraulic system and CNC system of the machine tool.

[0018] The machine tool adopts a fully closed-loop control system of the numerical control system. The utility model can realize high-precision turning and meet the needs of workpiece drilling and milling.

Claims

1. A high-precision CNC heavy-duty horizontal milling lathe for super-long rudder shafts for ships, comprising a main motor (1), a spindle box (2), a faceplate (4), a bed (5), a turning tool rest (6), a slide box (7), a hydrostatic center frame (9), a tailstock (10), a hydraulic system, and a CNC system. The equipment adopts an integral three-guide rail structure, which is divided into a tool rest guide rail and a workpiece guide rail. The main motor (1) and the spindle box (2) are arranged at the left end of the bed (5). The turning tool rest (6), the hydrostatic center frame (9) and the tailstock (10) are placed on the guide rail of the workpiece bed (5). A slide box (7) is arranged between the turning tool rest (6) and the bed (5). The faceplate (4) is located on the right side of the spindle box (2). The hydraulic system and the CNC system of the machine tool are connected to the main motor (1), the spindle box (2), the turning tool rest (6) and the hydrostatic center frame (9). The equipment is characterized in that: A C-axis assembly (3) is provided on the top of the spindle box (2), and a drilling and milling tool holder (8) is provided on the bed (5); the C-axis assembly (3) includes a C-axis transmission mechanism and a C-axis clamping mechanism (11); the C-axis transmission mechanism adopts a dual servo motor master-slave control backlash elimination principle, and the C-axis transmission mechanism is composed of a C-axis box body (12), dual servo motors (13), a reducer (14), a gear transmission chain (15), and a pinion (17); the C-axis box body (12) is installed on the top of the spindle box (2), and the servo motor ( The gear (13) is installed together with the reducer (14) on the upper part of the C-axis housing (12), and the torque is transmitted to the pinion (17) through the gear transmission chain (15). The pinion (17) engages with the large gear ring inside the spindle housing (2) to drive the spindle to rotate and index. When the C-axis assembly (3) needs to be indexed, the shift mechanism (16) in the spindle housing (2) slides the gear to the meshing position. After the indexing is completed, the C-axis clamping mechanism (11) is controlled by the hydraulic system to start working automatically, clamping the side wall of the faceplate (4).

2. According to claim 1, a high-precision CNC heavy-duty horizontal milling lathe for super-long rudder shaft for ships, characterized in that: The drilling and milling tool holder (8) is composed of a large tool holder (18), a rotary tool holder (19), an upper tool holder (20), a left tool plate (21), and a right drilling and milling device (22); A large tool rest (18) is mounted on the upper part of the bed (5), a rotary tool rest (19) is mounted on the upper part of the large tool rest (18), an upper tool rest (20) is mounted on the upper part of the rotary tool rest (19), and manual rotation of ±90° is achieved through the rotary tool rest (19). A left tool plate (21) is arranged on the left side of the upper tool rest (20), and a right drilling and milling device (22) is arranged on the right side of the upper tool rest (20). The drilling and milling tool rest (8) is connected to the hydraulic system and the numerical control system of the machine tool.

3. A high-precision CNC heavy-duty horizontal milling lathe for super-long rudder shaft for ships according to claim 2, characterized in that: The right drilling and milling device (22) is composed of a spindle motor (23), a two-speed reducer (24), a synchronous pulley assembly (25), a drilling and milling spindle (26) and a drilling and milling spindle box. The spindle motor (23) is connected to the two-speed reducer (24) and fixed outside the drilling and milling spindle box. The spindle motor (23) drives the drilling and milling spindle (26) inside the drilling and milling spindle box to rotate through the synchronous pulley assembly (25) inside the drilling and milling spindle box.

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