Rotary table for numerical control boring and milling machine

Abstract

The utility model discloses a rotary table for a numerical control boring and milling machine, which relates to the technical field of rotary tables and comprises a rotary table and a bottom table, the rotary table is arranged above the bottom table, a transmission case is fixedly arranged on one side of the bottom table, a motor is arranged on one side of the transmission case, and two groups of double-lead worms are rotatably arranged in the transmission case. The two sets of double-lead worms are connected through a coupler, one end of one set of double-lead worms rotationally penetrates through the transmission box and is fixedly connected with an output shaft of the motor, and one sides of the two sets of double-lead worms are both meshed with worm wheels. According to the rotating table for the numerical control boring and milling machine, the motor is arranged to drive the two sets of double-lead worms to rotate, the two sets of double-lead worms are meshed with the two sets of worm wheels respectively to rotate in the same direction, and the torque of the rotating table can be increased through meshing of the two sets of gears A and B; and through the two sets of gears A and the two sets of double-lead worms, the gap generated when the rotating workbench rotates forwards and backwards can be reduced, and the machining precision is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary worktables, in particular to a rotary worktable for a numerically controlled boring and milling machine. Background Art

[0002] The rotary table for CNC boring and milling machines is a device installed on CNC boring and milling machines to support and rotate the workpiece. It can make the workpiece rotate during the processing, so as to realize the processing of multiple faces or complex angles of the workpiece. The main features and functions of this rotary table include: high-precision positioning, multi-degree-of-freedom processing, automatic control, heavy-load capacity, and versatility. The rotary table has been widely used in the processing of complex parts in the fields of mold manufacturing, aerospace, and automobile manufacturing. It not only improves the processing efficiency, but also improves the processing accuracy and quality of parts.

[0003] In the prior art, the rotary table used in CNC boring and milling machines has the problem that the torque cannot meet the working requirements under heavy load conditions and there is a reverse clearance that can easily lead to machining deviations. The hydraulic oil in the table flows slowly, making it difficult to warm up the machine in the early stages of machining. Therefore, those skilled in the art have provided a large horizontal boring and milling table to solve the problems raised in the above background technology. Utility Model Content

[0004] To solve the above technical problems, the utility model provides the following technical solutions: a rotary table for a CNC boring and milling machine, comprising a rotating table and a base, the rotating table being arranged above the base, a transmission box being fixedly arranged on one side of the base, a motor being arranged on one side of the transmission box, two groups of double-lead worm gears being rotatably arranged in the transmission box, the two groups of double-lead worm gears being connected by a coupling, one end of one group of double-lead worm gears being rotatably passed through the transmission box and being fixedly connected to the output shaft of the motor, worm wheels being meshed on one side of the two groups of double-lead worm gears, gears A being fixedly connected below the two groups of worm wheels, the two groups of gears A being meshed with gear B together, gear C being meshed on the side of gear B away from gear A, gears B and gear C being rotatably arranged on the inner bottom of the base, a rotating rod being fixedly arranged at the upper end center of gear C, and the top end of the rotating rod being fixedly connected to the rotating table.

[0005] Preferably, a cam is provided on the outer fixed sleeve of the coupling, a support frame is fixedly provided on the side of the base close to the transmission box, a push rod is slidably inserted in the support frame, a push plate is fixedly provided on the end of the push rod close to the cam, and spoilers are fixedly provided on both sides of the other end of the push rod. The spoiler is S-shaped and can reciprocate the hydraulic oil in the base, thereby accelerating the flow of the hydraulic lubricating oil in the rotary worktable and reducing the warm-up time before processing.

[0006] Preferably, a compression spring is provided between the support frame and the push plate. The compression spring is slidably sleeved on the outside of the push rod. The two ends of the compression spring are respectively fixedly connected to the support frame and the push plate. The compression spring can make the push plate always contact with the cam. When the large end of the cam contacts the push plate, the compression spring is compressed to move the push rod. When the small end of the cam contacts the push plate, the compression spring stretches to make the push rod move in the opposite direction and reset to always keep in contact with the cam.

[0007] Preferably, the worm wheel is coaxially arranged with the gear A, and the axis of the gear A is perpendicularly arranged with the axis of the worm.

[0008] Preferably, the inner side wall of the base is connected to the inner side wall of the transmission box.

[0009] Preferably, the thread rotation direction of the two sets of double-lead worm gears is the same, so that the two worm wheels and the two gears A rotate in the same direction, thereby realizing the rotation of gear B meshing with the two sets of gears A, thereby increasing the torque of the rotary table.

[0010] Preferably, the distance from the axis of the coupling to the outer circumferential surface of the gear B is greater than the maximum diameter of the cam, ensuring that the cam will not interfere with the gear B when rotating.

[0011] Beneficial effects of the utility model:

[0012] 1. An electric motor is provided to drive two sets of double-lead worms to rotate. The two sets of double-lead worms respectively mesh with two sets of worm wheels to rotate in the same direction. The two sets of worm wheels drive two sets of gears A to rotate in the same direction. The two sets of gears A drive gear B to rotate. The engagement of the two sets of gears A and gear B can increase the torque of the rotary table. Gear B drives gear C to rotate and then drives the rotary table to rotate. The two sets of gears A and the two sets of double-lead worms can reduce the gap when the rotary table rotates forward and backward, thereby improving the processing accuracy.

[0013] 2. A cam is sleeved on the outer side of the coupling. The cam contacts the push plate to make the push rod reciprocate in the support frame. When the large end of the cam contacts the push plate, the compression spring is compressed to make the push rod move. When the small end of the cam contacts the push plate, the compression spring stretches to make the push rod move in the opposite direction and reset, always keeping in contact with the cam. The spoiler reciprocates under the cooperation of the cam and the push plate, which can reciprocate the hydraulic lubricating oil in the base, accelerate the flow of the hydraulic lubricating oil in the rotary table, and reduce the warm-up time before processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0017] Figure 3 It is a schematic top view of part of the structure of the utility model;

[0018] Figure 4 It is a schematic diagram of the front view of part of the structure of the utility model;

[0019] Figure 5 For this utility model Figure 2 A schematic diagram of the enlarged structure in the middle.

[0020] Description of reference numerals:

[0021] 1. Rotating workbench; 2. Base; 3. Transmission box; 4. Motor; 5. Gear B; 6. Coupling; 7. Worm gear; 8. Support frame; 9. Double-lead worm; 10. Gear C; 11. Rotating rod; 12. Cam; 13. Gear A; 14. Compression spring; 15. Push plate; 16. Spoiler; 17. Push rod. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0023] Reference Figure 1-5 , is an embodiment of the utility model, and provides a rotary table for a CNC boring and milling machine. The rotary table for a CNC boring and milling machine includes a rotary table 1 and a base 2. The rotary table 1 is arranged above the base 2. A transmission box 3 is fixedly arranged on one side of the base 2. A motor 4 is arranged on one side of the transmission box 3. Two groups of double-lead worm gears 9 are rotatably arranged in the transmission box 3. The two groups of double-lead worm gears 9 are connected by a coupling 6. One end of one group of double-lead worm gears 9 rotates and penetrates the transmission box 3 and is fixedly connected to the output shaft of the motor 4. One side of the two groups of double-lead worm gears 9 is meshed with a worm wheel 7. Gears A13 are fixedly connected below the two groups of worm wheels 7. The two groups of gears A13 are commonly meshed with a gear B5. The side of the gear B5 away from the gear A13 is meshed with a gear C10. The gears B5 and the gear C10 are both rotatably arranged on the inner bottom of the base 2. A rotating rod 11 is fixedly arranged at the center of the upper end of the gear C10, and the top of the rotating rod 11 is fixedly connected to the rotary table 1.

[0024] A cam 12 is provided on the outer fixed sleeve of the coupling 6, and a support frame 8 is fixedly provided on one side of the base 2 close to the transmission box 3. A push rod 17 is slidably inserted in the support frame 8. A push plate 15 is fixedly provided on one end of the push rod 17 close to the cam 12, and spoilers 16 are fixedly provided on both sides of the other end of the push rod 17. The spoiler 16 is S-shaped and can reciprocate the hydraulic lubricating oil in the base 2, thereby accelerating the flow of the hydraulic lubricating oil in the rotary worktable and reducing the warm-up time before processing.

[0025] A compression spring 14 is provided between the support frame 8 and the push plate 15. The compression spring 14 is slidably sleeved on the outside of the push rod 17. The two ends of the compression spring 14 are respectively fixedly connected to the support frame 8 and the push plate 15. The compression spring 14 can make the push plate 15 always contact with the cam 12. When the large end of the cam 12 contacts the push plate 15, the compression spring 14 is compressed to move the push rod 17. When the small end of the cam 12 contacts the push plate 15, the compression spring 14 is extended to make the push rod 17 move in the opposite direction and reset to always keep in contact with the cam 12.

[0026] The worm wheel 7 is coaxially arranged with the gear A13, and the axis of the gear A13 is perpendicularly arranged with the axis of the worm.

[0027] The inner side wall of the base 2 is communicated with the inner side wall of the transmission box 3 .

[0028] The two sets of double-lead worms 9 have the same thread rotation direction, so that the two worm wheels 7 and the two gears A13 rotate in the same direction, realizing the rotation of the gear B5 meshing with the two sets of gears A13, thereby increasing the torque of the rotary table.

[0029] The distance from the axis of the coupling 6 to the outer circumferential surface of the gear B5 is greater than the maximum diameter of the cam 12, ensuring that the cam 12 will not interfere with the gear B5 when rotating.

[0030] During use, the motor 4 drives the two sets of double-lead worm 9 to rotate, the two sets of double-lead worm 9 respectively mesh with the two sets of worm wheels 7 to rotate in the same direction, the two sets of worm wheels 7 drive the two sets of gears A13 to rotate in the same direction, the two sets of gears A13 drive the gear B5 to rotate, the engagement of the two sets of gears A13 with the gear B5 can increase the torque of the rotary table, the gear B5 drives the gear C10 to rotate and then drives the rotary table 1 to rotate, the two sets of gears A13 and the two sets of double-lead worm 9 can reduce the clearance when the rotary table 1 rotates forward and reversely, improve the processing accuracy, and the coupling A cam 12 is sleeved on the outer side of the device 6. The cam 12 contacts with the push plate 15 to make the push rod 17 reciprocate in the support frame 8. When the large end of the cam 12 contacts with the push plate 15, the compression spring 14 is compressed to make the push rod 17 move. When the small end of the cam 12 contacts with the push plate 15, the compression spring 14 stretches to make the push rod 17 move in the opposite direction and reset, always keeping in contact with the cam 12. The spoiler 16 reciprocates under the cooperation of the cam 12 and the push plate 15, and can reciprocate the hydraulic lubricating oil in the base 2, accelerate the flow of the hydraulic lubricating oil in the rotary table, and reduce the warm-up time before processing.

[0031] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A rotary table for a CNC boring and milling machine, comprising a rotary table (1) and a base table (2), characterized in that: The rotating workbench (1) is arranged above the base (2), a transmission box (3) is fixedly arranged on one side of the base (2), a motor (4) is arranged on one side of the transmission box (3), two sets of double-lead worm gears (9) are rotatably arranged in the transmission box (3), the two sets of double-lead worm gears (9) are connected by a coupling (6), one end of one set of double-lead worm gears (9) rotatably passes through the transmission box (3) and is fixedly connected to the output shaft of the motor (4), and one side of the two sets of double-lead worm gears (9) are A worm gear (7) is meshed with the two sets of worm gears (7), and a gear A (13) is fixedly connected below the two sets of worm gears (7). The two sets of gears A (13) are commonly meshed with a gear B (5), and a gear C (10) is meshed with a side of the gear B (5) away from the gear A (13). The gears B (5) and C (10) are both rotatably arranged on the inner bottom of the base (2), and a rotating rod (11) is fixedly arranged at the center of the upper end of the gear C (10), and the top end of the rotating rod (11) is fixedly connected to the rotating workbench (1).

2. The rotary table for a CNC boring and milling machine according to claim 1, characterized in that: A cam (12) is provided on the outer fixed sleeve of the coupling (6); a support frame (8) is fixedly provided on one side of the base (2) close to the transmission box (3); a push rod (17) is slidably inserted in the support frame (8); a push plate (15) is fixedly provided on one end of the push rod (17) close to the cam (12); and spoilers (16) are fixedly provided on both sides of the other end of the push rod (17).

3. The rotary table for a CNC boring and milling machine according to claim 2, characterized in that: A compression spring (14) is provided between the support frame (8) and the push plate (15), the compression spring (14) being slidably sleeved on the outside of the push rod (17), and the two ends of the compression spring (14) being fixedly connected to the support frame (8) and the push plate (15) respectively.

4. The rotary table for a CNC boring and milling machine according to claim 1, characterized in that: The worm wheel (7) and the gear A (13) are coaxially arranged, and the axis of the gear A (13) is arranged perpendicular to the axis of the worm.

5. The rotary table for a CNC boring and milling machine according to claim 1, characterized in that: The inner side wall of the base (2) is in communication with the inner side wall of the transmission box (3).

6. The rotary table for a CNC boring and milling machine according to claim 1, characterized in that: The thread rotation directions of the two sets of double-lead worm gears (9) are the same.

7. The rotary table for a CNC boring and milling machine according to claim 2, characterized in that: The distance between the axis of the coupling (6) and the outer circumferential surface of the gear B (5) is greater than the maximum diameter of the cam (12).

Images