CN216781015U - Direct-drive numerical control precision rotary table and machine tool - Google Patents
Direct-drive numerical control precision rotary table and machine tool Download PDFInfo
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- CN216781015U CN216781015U CN202220113020.XU CN202220113020U CN216781015U CN 216781015 U CN216781015 U CN 216781015U CN 202220113020 U CN202220113020 U CN 202220113020U CN 216781015 U CN216781015 U CN 216781015U
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Abstract
The utility model discloses a direct-drive numerical control precision rotary table and a machine tool, wherein the precision rotary table comprises a rotary table bearing, a rotary main shaft, a rotary table bearing seat, a rotor of a torque motor, a stator of the torque motor, a connecting flange plate, a rotary worktable, a connecting flange chassis and a lining; the rotor of the torque motor is rigidly connected with the rotary main shaft through the connecting flange plate; the inner ring of the turntable bearing is arranged on the rotary main shaft, and the rotary working table is rigidly connected with the rotary main shaft; the stator of the torque motor is assembled and connected with the connecting flange chassis and the bushing; the outer ring of the turntable bearing is arranged on the turntable bearing seat, and the turntable bearing seat is rigidly connected with the bush of the stator of the fixed torque motor. The utility model has the advantages of simple structure, convenient installation and debugging, short assembly period, high precision stability and convenient maintenance.
Description
Technical Field
The utility model relates to the field of machine tools, in particular to a direct-drive numerical control precision rotary table and a machine tool.
Background
The numerical control turntable is an important machine tool accessory, is mainly applied to a machining center and a numerical control boring and milling machine, and is used as a fourth axis to participate in control of a coordinate axis. The application of the numerical control rotary table provides a rotary coordinate for the machine tool, and the rotary table is driven by the fourth shaft and the fifth shaft to finish equal-division, unequal-division or continuous rotary machining, so that a client can machine a complex curved surface possibly, and the machining range of the machine tool is expanded.
The technical problems of the prior art closest to the present invention are as follows:
in the structural design of the traditional numerical control turntable, a double-gear anti-backlash transmission mode or a worm-and-gear pair transmission mode is generally adopted, and the defects of the traditional numerical control turntable are that the mechanical structure is complex, the transmission chain is long, the number of parts is large, the manufacturing precision requirement of key parts is high, the assembly is complex, the transmission efficiency is low and the like; after a period of use, the backlash of the gear pair or worm-and-gear pair increases due to wear of the mechanical transmission chain, and further maintenance and adjustment are required. In addition, the transmission ratio of the turbine worm pair is large, so that the highest rotating speed of the numerical control turntable is greatly limited, and the requirements of the market on the feeding speed and the rapid feeding speed of the rotating coordinate axis of the numerical control machine tool cannot be met.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a novel technical scheme of a direct-drive numerical control precision turntable and a machine tool.
According to a first aspect of the present invention, there is provided a direct drive type numerical control precision turntable, comprising: the rotary table comprises a rotary table bearing, a rotary main shaft, a rotary table bearing seat, a rotor of a torque motor, a stator of the torque motor, a connecting flange plate, a rotary worktable, a connecting flange chassis and a lining;
the rotor of the torque motor is rigidly connected with the rotary main shaft through the connecting flange plate;
the inner ring of the turntable bearing is arranged on the rotary main shaft, and the rotary worktable is rigidly connected with the rotary main shaft;
the stator of the torque motor is assembled and connected with the connecting flange chassis and the bushing;
the turntable bearing seat is rigidly connected with the bushing, and the bushing is used for fixing the torque motor stator.
According to the technical solution of the first aspect, the precision turntable further comprises: the device comprises an encoder positioning shaft, an angle encoder and a deep groove ball bearing; the encoder positioning shaft is fixedly arranged on the rotary worktable; the lower part of the encoder positioning shaft is provided with a deep groove ball bearing, and the angle encoder is also arranged on the encoder positioning shaft.
According to the technical scheme of the first aspect, the precision rotary table further comprises a hydraulic braking device, and the hydraulic braking device is installed in the rotary table bearing seat and used for braking the precision rotary table.
According to the technical scheme of the first aspect, the hydraulic braking device is sequentially provided with a spring, a hydraulic cylinder and a brake pad from bottom to top; the hydraulic cylinder generates axial thrust to hold the brake pad under the action of the spring, so that the rotary motion of the rotary worktable is stopped, and the braking of the rotary worktable is completed.
According to the technical scheme of the first aspect, the precision rotary table further comprises a sleeve of the multi-oil-path rotary joint and a rotating shaft of the multi-oil-path rotary joint;
the sleeve of the multi-oil-path rotary joint is rigidly connected with the connecting flange chassis, and the rotating shaft of the multi-oil-path rotary joint is rigidly connected with the rotary main shaft.
According to the technical scheme of the first aspect, the multi-oil-path rotary joint is provided with 5-15 hydraulic or air control loops, and 5-15 oil-path quick connectors are arranged outside the rotary worktable.
According to the technical solution of the first aspect, the precision turntable further comprises: a dust-proof cover plate;
and the dustproof cover plate is covered outside the whole precision turntable.
According to the technical scheme of the first aspect, a V-shaped sealing ring is further arranged between the table body of the rotary table and the dustproof cover plate.
According to the technical scheme of the first aspect, the rigid connection between the connecting flange and the rotary main shaft is realized through fastening bolts.
According to a second aspect of the utility model, there is provided a machine tool comprising a direct drive numerically controlled precision turret according to any of the first aspects of the utility model.
According to the embodiment disclosed by the utility model, from the aspects of market requirements and application, the torque motor is adopted in design to directly drive the rotary worktable to rotate, so that the angular positioning and the rotary feeding of the rotary worktable are realized, the defects of the traditional numerical control rotary table are overcome, and the numerical control rotary table has the following beneficial effects:
1. the rotary worktable is directly driven by a torque motor, no transmission pair is arranged in the middle, zero reverse clearance is realized, and no mechanical transmission chain abrasion and no transmission efficiency loss exist theoretically.
2. Because the torque motor has extremely high static and dynamic load rigidity, the high positioning precision and repeated positioning precision can be kept even under high-speed rotary motion.
3. The torque motor directly drives the rotary working table, can provide larger torque, participates in turning, and realizes a turning and milling composite function.
4. The design adopts a hydraulic braking device to realize the powerful cutting processing of the rotary worktable after braking and locking at any angle; and when the machine tool is abnormally powered off, the rotary worktable can be immediately braked and locked, so that the effect of protecting the cutter and the machine tool is achieved.
5. The design adopts many oil circuits rotary joint mechanism, can provide the quick interface of 10 oil circuits of numerical control revolving stage, and the user accessible connects these oil circuit interfaces, very conveniently realizes the automatically clamped of frock instrument, provides the port for automatic cutting process.
6. Simple structure, installation and debugging are convenient, assembly cycle is short, precision stability is high and be convenient for maintain.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description, serve to explain the principles of the utility model.
Fig. 1 is a schematic view of a direct-drive numerical control precision turntable according to an embodiment.
The figures are labeled as follows:
11-a turntable bearing, 12-a rotary main shaft, 13-a turntable bearing seat, 14-a dustproof cover plate, 19-a rotary worktable, 117-a turntable fixing bolt, 120-an encoder positioning shaft, 20-a rotor of a torque motor, 21-a stator of the torque motor, 22-a connecting flange plate, 23-a bush, 25-a connecting flange chassis, 41-a sleeve of a multi-oil-path rotary joint, 42-a rotating shaft of the multi-oil-path rotary joint, 48-an angle encoder, 413-a deep groove ball bearing and 50-a hydraulic braking device.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the utility model, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
The first embodiment is as follows:
the embodiment provides a direct-drive numerical control precision turntable, as shown in fig. 1, which includes a turntable bearing 11, a rotary main shaft 12, a turntable bearing seat 13, a rotor 20 of a torque motor, a stator 21 of the torque motor, a connecting flange disc 22, a rotary worktable 19, a connecting flange chassis 25 and a bushing 23;
the rotor 20 of the torque motor is rigidly connected with the rotary main shaft 12 through a connecting flange 22 and a fastening bolt; the inner ring of the turntable bearing 11 is assembled and connected on the rotary main shaft 12, and the rotary worktable 19 is directly and rigidly connected with the rotary main shaft 12.
The stator 21 of the torque motor is assembled and connected with the connecting flange chassis 25 and the lining 23 through fastening bolts; the outer ring of the turntable bearing 11 is assembled on the turntable bearing seat 13, and then the turntable bearing seat 13 is rigidly connected with a bush 23 for fixing the torque motor stator 21, and the bush 23 is fixed on the turntable through a turntable fixing bolt 117.
In this way, the torque motor drives the rotor 20 of the torque motor to rotate immediately after being powered on, and directly drives the rotary main shaft 12 to rotate under the support of the turntable bearing 11, so as to drive the rotary table 19 to rotate. Because no transmission pair is arranged in the middle, zero reverse clearance is realized, the theoretical transmission efficiency of the torque motor is 100 percent, and the efficiency loss is zero. The torque motor can provide larger torque, and the rotary worktable can participate in linkage control and cutting processing to realize the fourth shaft function of the numerical control machine; meanwhile, by matching with a turning tool, the turning and milling composite function can be realized.
Because the torque motor has extremely high static and dynamic load rigidity, the high positioning precision and repeated positioning precision can be kept even under high-speed rotary motion. The encoder positioning shaft 120 is fastened on the rotary worktable 19 through bolts, meanwhile, a supporting deep groove ball bearing 413 is assembled below the encoder positioning shaft 120, then a high-precision angle encoder 48 is installed, and the angle encoder 48 (commonly called a circular grating) is installed at the bottom of the encoder positioning shaft 120 and then is locked and fixed through a locking nut. The encoder positioning shaft 120 is rigidly connected to the circular turntable for rotational movement therewith. Therefore, full closed-loop control of the rotary motion of the rotary worktable can be realized, and the high-precision angle positioning and indexing functions can be further completed.
The hydraulic brake device 50 is installed in the bearing seat 13 of the rotary table and plays a role in braking and locking the rotary table. The hydraulic braking device comprises a hydraulic cylinder, a spring and a brake pad; the hydraulic cylinder is acted by a spring arranged in the hydraulic cylinder to generate axial thrust to hold the brake pad, so that the rotary motion of the rotary worktable is stopped, and the brake of the rotary worktable is completed. In some embodiments, specifically, the hydraulic braking device 50 is, from bottom to top: coil type springs (8 in one circle), a piston of the hydraulic cylinder and a brake pad. The spring pushes the piston axially, and the piston presses the brake pad axially to generate braking, which is commonly called disc brake. When the equipment is in a power-off state, because the hydraulic cylinder of the hydraulic braking device 50 is acted by a circle of spring force inside, a smaller axial thrust is generated to hold the brake pad, so that the rotary motion of the rotary worktable is stopped, and the safety protection effect is realized on an equipment operator and the equipment; when the equipment is in a power-on state, the hydraulic cylinder of the hydraulic braking device 50 not only receives the axial thrust of the internal spring force, but also receives the high pressure, and generates a large axial thrust to lock the rotary table, so that the strong cutting processing of a workpiece can be met, and the integral rigidity and the processing precision of the rotary table can be ensured. Certainly, the locking of the rotary table can be easily released through reverse hydraulic pressure, and the linked machining of the rotary table is realized.
The sleeve 41 of the multi-oil path rotary joint is rigidly connected with the connecting flange chassis 25, and the rotating shaft 42 of the multi-oil path rotary joint is rigidly connected with the rotary main shaft 12. The multi-oil-path rotary joint provides 1-15 hydraulic or air control loops, and provides 1-15 quick interfaces of oil paths on the rotary worktable, in some embodiments, 10 quick interfaces can be preferred, so that a user can conveniently realize automatic clamping and other function utilization of a tool by connecting the oil path interfaces, and a port is also provided for automatic cutting machining; the trouble that the traditional rotary table is not provided with the function and is independently designed and manufactured for a hydraulic or air loop device is effectively solved, and the cost is effectively reduced for users, and the safety and the convenience are improved.
In some embodiments, the dust-proof cover plate 14 and the V-shaped sealing ring are used together to effectively prevent dust and iron filings from entering, thereby prolonging the service life of the turntable.
Example two:
the embodiment provides a machine tool, which comprises the direct-drive numerical control precision rotary table in the first embodiment.
In conclusion, the rotary worktable of the direct-drive numerical control precise rotary table and the machine tool provided by the utility model is directly driven by the torque motor, no transmission pair is arranged in the middle, zero reverse clearance is realized, and no mechanical transmission chain abrasion and no transmission efficiency loss exist theoretically; because the torque motor has extremely high static and dynamic load rigidity, the high positioning precision and repeated positioning precision can be kept even under high-speed rotary motion; the torque motor directly drives the rotary table, can provide larger torque, participates in turning and realizes the turning and milling composite function; the design adopts a hydraulic braking device to realize the powerful cutting processing of the rotary worktable after the braking and the locking at any angle; when the machine tool is abnormally powered off, the rotary worktable can be immediately braked and locked, so that the cutter and the machine tool are protected; the design adopts many oil circuits rotary joint mechanism, can provide the quick interface of 10 oil circuits of numerical control revolving stage, and the user accessible connects these oil circuit interfaces, very conveniently realizes the automatically clamped of frock instrument, provides the port for automatic cutting process. The device has the advantages of simple structure, convenience in installation and debugging, short assembly period, high precision stability and convenience in maintenance.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the utility model. The scope of the utility model is defined by the appended claims.
Claims (10)
1. A direct-drive numerical control precision turntable is characterized by comprising: the rotary table comprises a rotary table bearing, a rotary main shaft, a rotary table bearing seat, a rotor of a torque motor, a stator of the torque motor, a stator of a fixed torque motor, a connecting flange plate, a rotary worktable, a connecting flange chassis and a lining;
the rotor of the torque motor is rigidly connected with the rotary main shaft through the connecting flange plate;
the inner ring of the turntable bearing is arranged on the rotary main shaft, and the rotary worktable is rigidly connected with the rotary main shaft;
the stator of the torque motor is assembled and connected with the connecting flange chassis and the bushing;
the outer ring of the rotary table bearing is arranged on the rotary table bearing seat, the rotary table bearing seat is rigidly connected with the bushing, and the bushing is used for fixing the torque motor stator.
2. The direct drive, digitally controlled, precision turntable of claim 1, further comprising: the device comprises an encoder positioning shaft, an angle encoder and a deep groove ball bearing; the encoder positioning shaft is fixedly arranged on the rotary worktable; the lower part of the encoder positioning shaft is provided with a deep groove ball bearing, and the angle encoder is also arranged on the encoder positioning shaft.
3. The direct drive type numerical control precision turntable of claim 2, further comprising a hydraulic braking device installed in the turntable bearing seat for braking the precision turntable.
4. The direct-drive numerical control precise rotary table according to claim 3, wherein the hydraulic braking device is provided with a spring, a hydraulic cylinder and a brake pad in sequence from bottom to top; the hydraulic cylinder generates axial thrust to hold the brake pad under the action of the spring, so that the rotary motion of the rotary worktable is stopped, and the braking of the rotary worktable is completed.
5. The direct-drive numerical control precision turntable of claim 4, further comprising a sleeve of the multi-oil-path rotary joint and a rotating shaft of the multi-oil-path rotary joint;
the sleeve of the multi-oil-path rotary joint is rigidly connected with the connecting flange chassis, and the rotating shaft of the multi-oil-path rotary joint is rigidly connected with the rotary main shaft.
6. A direct-drive numerical control precision rotary table according to claim 5, wherein the multi-oil-path rotary joint has 5-15 hydraulic or air control loops, and is externally provided with a quick interface of 5-15 oil paths through the rotary table.
7. The direct drive, digitally controlled, precision turntable of claim 6, further comprising: a dust-proof cover plate;
and the dustproof cover plate is covered outside the whole precision turntable.
8. The direct-drive numerical control precision turntable according to claim 7, wherein a V-shaped sealing ring is further arranged between the turntable body and the dustproof cover plate.
9. The direct-drive numerical control precision turntable according to claim 1, wherein the rigid connection of the connecting flange plate and the rotation main shaft is realized by fastening bolts.
10. A machine tool comprising a direct drive numerically controlled precision turret according to any of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220113020.XU CN216781015U (en) | 2022-01-17 | 2022-01-17 | Direct-drive numerical control precision rotary table and machine tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220113020.XU CN216781015U (en) | 2022-01-17 | 2022-01-17 | Direct-drive numerical control precision rotary table and machine tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216781015U true CN216781015U (en) | 2022-06-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220113020.XU Active CN216781015U (en) | 2022-01-17 | 2022-01-17 | Direct-drive numerical control precision rotary table and machine tool |
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| Country | Link |
|---|---|
| CN (1) | CN216781015U (en) |
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- 2022-01-17 CN CN202220113020.XU patent/CN216781015U/en active Active
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