CN113043161A - Direct-drive rotary worktable and cylindrical grinding machine comprising same - Google Patents
Direct-drive rotary worktable and cylindrical grinding machine comprising same Download PDFInfo
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- CN113043161A CN113043161A CN202110334653.3A CN202110334653A CN113043161A CN 113043161 A CN113043161 A CN 113043161A CN 202110334653 A CN202110334653 A CN 202110334653A CN 113043161 A CN113043161 A CN 113043161A
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- rotary table
- mounting groove
- torque motor
- turntable
- circular mounting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/02—Frames; Beds; Carriages
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B47/00—Drives or gearings; Equipment therefor
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- Mechanical Engineering (AREA)
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Abstract
The utility model provides a direct-drive rotary worktable, include: the rotary table is rotatably connected with the box body seat through a rotary table bearing, the torque motor is arranged between the rotary table and the box body seat, a stator and a rotor of the torque motor are respectively fixedly connected with the box body seat and the rotary table, and the relative position between the rotary table and the box body seat is fixed through the locking component. The torque motor is matched with the rotary table bearing to fix and drive the rotary table, the torque motor directly drives the high-precision rotary table, a speed reduction transmission gear is omitted, the corresponding speed of the high-precision rotary table is improved, transmission errors are eliminated, and the operation precision of the system is improved. The locking of the rotary table is realized through the locking assembly, the stability of the position of the rotary table is improved, and the angle of the rotary table cannot be changed in the long-time working process.
Description
Technical Field
The utility model relates to a machine tooling field especially relates to a direct-drive rotary worktable, including its cylindrical grinder.
Background
The development of modern numerical control machine tools tends to be high-speed, high-precision and intelligent, and a rotary table (high-precision B-axis system) which is a key accessory of precision grinding equipment also faces the requirement of the development of high precision.
The turntable bearing is used as a core component of the turntable, and not only has high bearing capacity, but also needs to have high rotation precision, high anti-overturning capacity, high rotating speed capacity and the like in the operation process of the turntable. At present, most of turntable bearings adopt hydrostatic bearings, the hydrostatic floating amount changes greatly along with the change of external load, the rigidity retentivity of an oil film is poor, the generation of the hydrostatic oil film is difficult, and the like, so that the defects of the structure on the high-precision retentivity are also caused. And the adoption of the hydrostatic bearing leads to high requirements on machine tool machining, high assembly difficulty, complex hydraulic system, high failure rate and the like, and further reduces the reliability of the machine tool.
Disclosure of Invention
In order to solve at least one of the above technical problems, the present disclosure provides a direct drive type rotary table, a cylindrical grinding machine including the same.
According to one aspect of the present disclosure, a direct drive rotary table includes: the rotary table is rotatably connected with the box body seat through a rotary table bearing, the torque motor is arranged between the rotary table and the box body seat, a stator and a rotor of the torque motor are respectively fixedly connected with the box body seat and the rotary table, and the relative position between the rotary table and the box body seat is fixed through the locking component.
Preferably, the turntable bearing is arranged at the upper part of the turntable/the box body seat, the torque motor is arranged at the middle part of the turntable/the box body seat, and the locking assembly is arranged at the lower part of the turntable/the box body seat.
Specifically, the revolving stage is the round platform structure, box base inside be provided with the circular mounting groove of revolving stage adaptation, the revolving stage sets up in the circular mounting groove, just the revolving stage with the coaxial setting of circular mounting groove, the upper end of the lateral surface of revolving stage is passed through the revolving stage bearing with the upper end rotatable coupling of the medial surface of circular mounting groove.
Preferably, the torque motor is coaxially arranged with the rotary table and the circular mounting groove, a stator of the torque motor is fixedly connected with the lower end of the circular mounting groove, and a rotor of the torque motor is fixedly connected with the lower end of the rotary table.
Specifically, locking Assembly includes locking ring and hydraulic pressure dish, hydraulic pressure dish sets up in the circular mounting groove, just hydraulic pressure dish the downside with the bottom surface fixed connection of circular mounting groove, the upside of locking ring with the lower terminal surface fixed connection of round platform, the locking ring with hydraulic pressure dish corresponds the setting, the downside of locking ring with set up the upper gap between hydraulic pressure dish the upside, the height in clearance is not more than hydraulic pressure dish's the biggest upstroke.
Further, locking Assembly still includes the dish spring, and a plurality of dish springs are evenly fixed to be set up the side of going up of hydraulic pressure dish, the lower extreme of dish spring with hydraulic pressure dish fixed connection, the upper end of dish spring with the distance is less than between the downside of locking ring the clearance.
Furthermore, the workbench further comprises an angle encoder, the angle encoder is coaxially arranged with the rotary table and the circular mounting groove, the angle encoder is fixedly connected with the rotary table and the circular mounting groove, and a data output end of the angle encoder is electrically connected with a data input end of the torque motor.
Preferably, a cavity is arranged between the lower end face of the rotary table and the bottom face of the circular mounting groove, and the angle encoder is fixedly arranged in the cavity.
As an embodiment, the turntable is of a multi-stage circular truncated cone structure, the number of stages of the turntable is at least three, the diameter of the lower end of the turntable is smaller than that of the upper end of the circular truncated cone, and the turntable is sequentially provided with an upper end surface, a first side surface, a first circular table surface, a second side surface, a second circular table surface, a third side surface and a lower end surface from top to bottom;
the first round table surface of the rotary table is in movable sealing fit with the upper side surface of the box body seat, the second side surface of the rotary table is in rotatable connection with the inner side surface of the circular mounting groove through the rotary table bearing, the rotor of the torque motor is in fit with the second round table surface and the third side surface of the round table, and the rotor of the torque motor is fixedly connected with the rotary table through a countersunk screw penetrating through the rotary table.
Cylindrical grinder comprises the direct-drive rotary worktable
According to at least one embodiment of the present disclosure, the present disclosure realizes the fixation and driving of the turntable through the matching of the torque motor and the turntable bearing, the torque has the characteristics of low rotation speed, large torque, strong overload capacity, fast response, small torque fluctuation and the like, the torque motor directly drives the high-precision turntable, the reduction transmission gear is omitted, the corresponding speed of the high-precision turntable is improved, the transmission error is eliminated, and the operation precision of the system is improved.
The locking of the rotary table is realized through the locking assembly, the stability of the position of the rotary table is improved, and the angle of the rotary table cannot be changed in the long-time working process.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the disclosure and together with the description serve to explain the principles of the disclosure.
FIG. 1 is a cross-sectional view of a direct drive rotary table according to the present disclosure.
FIG. 2 is a schematic view of a locking assembly according to the present disclosure.
Fig. 3 is a schematic view of the installation of a disc spring according to the present disclosure.
Reference numerals: the device comprises a rotary table 1, a rotary table bearing 2, a torque motor 3, a box body seat 4, an angle encoder 5, a locking ring 6, a hydraulic disc 7 and a disc spring 8.
Detailed Description
The present disclosure will be described in further detail with reference to the drawings and embodiments. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not to be construed as limitations of the present disclosure. It should be further noted that, for the convenience of description, only the portions relevant to the present disclosure are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict. The present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
A direct drive rotary table comprising: revolving stage 1, box seat 4, torque motor 3 and locking Assembly, revolving stage 1 passes through revolving stage bearing 2 and box seat 4 rotatable coupling, and torque motor 3 sets up between revolving stage 1 and box seat 4, and torque motor 3's stator and rotor respectively with box seat 4 and 1 fixed connection of revolving stage, the relative position between revolving stage 1 and the box seat 4 is fixed through locking Assembly.
The turntable bearing 2 is arranged at the upper part of the turntable 1/box body seat 4, the torque motor 3 is arranged at the middle part of the turntable 1/box body seat 4, and the locking assembly is arranged at the lower part of the turntable 1/box body seat 4.
The rotary connection between the rotary table 1 and the box body seat 4 is realized through the rotary table bearing 2, and the rotary table 1 is driven to rotate through the torque motor 3.
The torque motor 3 has the characteristics of low rotating speed, large torque, strong overload capacity, quick response, small torque fluctuation and the like, the torque motor 3 directly drives the high-precision rotary table 1, a speed reduction transmission gear is omitted, the corresponding speed of the high-precision rotary table 1 is improved, meanwhile, transmission errors are eliminated, and the operation precision of the system is improved.
Adopt high-accuracy revolving stage bearing 2, make revolving stage 1 part simple structure when guaranteeing that the gyration precision is high, solved and adopted traditional hydrostatic bearing to lead to the lathe processing to require highly, the assembly degree of difficulty is big, hydraulic system is complicated, technical problem such as fault rate height. However, the installation of the high-precision turntable bearing 2 has high requirements on the machining precision of the bearing installation surface, and the installation process has the problems of high requirements on the assembly manufacturability of the bearing and the like.
Revolving stage 1 is the round platform structure, and box base 4 is inside to be provided with the circular mounting groove of revolving stage 1 adaptation, and revolving stage 1 sets up in circular mounting groove, and revolving stage 1 and the coaxial setting of circular mounting groove, and the upper end rotatable coupling of the medial surface of revolving stage bearing 2 and circular mounting groove is passed through to the upper end of the lateral surface of revolving stage 1.
The torque motor 3 is a special motor with a large number of poles, can continuously run at a low speed of the motor even when the motor is locked (namely, a rotor cannot rotate), and cannot cause the damage of the motor. In this mode of operation, the motor can provide a steady torque to the load (hence the name torque motor). The torque motor may also provide a torque (braking torque) in the opposite direction to the operation. The shaft of the torque motor outputs power not at constant power but at constant torque.
Locking assembly includes locking ring 6, dish spring 8 and hydraulic pressure dish 7, and hydraulic pressure dish 7 sets up in circular mounting groove, and the downside of hydraulic pressure dish 7 and the bottom surface fixed connection of circular mounting groove, the last side of locking ring 6 and the lower terminal surface fixed connection of round platform, locking ring 6 corresponds the setting with hydraulic pressure dish 7, sets up the clearance between the downside of locking ring 6 and the upside of hydraulic pressure dish 7, and the height in clearance is not more than the biggest lift stroke of hydraulic pressure dish 7.
A plurality of dish springs 8 are evenly fixed and set up in the side of going up of hydraulic disc 7, and dish spring 8's lower extreme and hydraulic disc 7 fixed connection, distance between the downside of the upper end of dish spring 8 and locking ring 6 is less than the clearance.
When the rotary table 1 is driven by the torque motor 3 to rotate to a required position and the rotary table 1 needs to be locked and does not rotate, the hydraulic system supplies hydraulic pressure to the hydraulic disc 7, the hydraulic disc 7 moves upwards under the action of the pressure and is attached to the locking ring 6, so that the angle of the rotary table 1 cannot change in the long-time working process, the position of the rotary table 1 is ensured to be stable, the pressure is reduced after the work is finished, the hydraulic disc 7 is separated from the locking ring 6, and the rotation of the rotary table 1 is ensured.
Meanwhile, in order to accelerate the separation speed of the hydraulic disc 7 and the locking ring 6, the disc spring 8 is arranged on the hydraulic disc 7, the hydraulic disc 7 and the locking ring 6 are quickly separated through the elastic force of the disc spring 8, and the free rotation of the rotary table 1 is ensured.
The workstation still includes angle encoder 5, and angle encoder 5 and revolving stage 1 and the coaxial setting of circular mounting groove, and angle encoder 5 and revolving stage 1 and circular mounting groove fixed connection, and angle encoder 5's data output end is connected with torque motor 3's data input end electricity, is provided with the cavity between the lower terminal surface of revolving stage 1 and the bottom surface of circular mounting groove, and angle encoder 5 is fixed to be set up in the cavity.
The angle encoder 5 is used for controlling the rotary angle position of the rotary table 1, the HEIDENHAIN high-precision angle encoder 5 is adopted, the conventional ring gear type encoder is omitted, the related installation gap is adjusted according to the requirement, the whole structure is simple to install, the precision of the angle position is high and can reach +/-2.5 ", and the system has extremely high precision of the angle position.
As another embodiment, the turntable 1 is a multi-stage circular truncated cone structure, the number of stages of the turntable 1 is at least three, the diameter of the lower end of the turntable 1 is smaller than that of the upper end of the circular truncated cone, and the turntable 1 is sequentially provided with an upper end surface, a first side surface, a first circular table surface, a second side surface, a second circular table surface, a third side surface and a lower end surface from top to bottom;
the first round table surface of the rotary table 1 is in dynamic sealing fit with the upper side surface of the box body seat 4, the second side surface of the rotary table 1 is rotatably connected with the inner side surface of the circular mounting groove through a rotary table bearing 2, a rotor of the torque motor 3 is in fit with the second round table surface and the third side surface of the round table, and the rotor of the torque motor is fixedly connected with the rotary table 1 through a countersunk screw penetrating through the rotary table 1.
As shown in the structure in fig. 1, the turntable 1 may be configured as a multi-stage circular truncated cone structure, for example, four stages, five stages, etc., so as to facilitate the installation of each component (e.g., the sealing ring, the torque motor 3, the turntable bearing 2, etc.), the specific stage number may be flexibly controlled according to the actual situation, and the installation of each component may also be installed according to the specific situation.
The cylindrical grinding machine comprises the direct-drive rotary worktable, and other components of the cylindrical grinding machine can be composed of components of a machining machine tool at the present stage.
In the description herein, reference to the description of the terms "one embodiment/mode," "some embodiments/modes," "example," "specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment/mode or example is included in at least one embodiment/mode or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to be the same embodiment/mode or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments/modes or examples. Furthermore, the various embodiments/aspects or examples and features of the various embodiments/aspects or examples described in this specification can be combined and combined by one skilled in the art without conflicting therewith.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
It will be understood by those skilled in the art that the foregoing embodiments are merely for clarity of illustration of the disclosure and are not intended to limit the scope of the disclosure. Other variations or modifications may occur to those skilled in the art, based on the foregoing disclosure, and are still within the scope of the present disclosure.
Claims (10)
1. A direct drive rotary table, comprising: the rotary table is rotatably connected with the box body seat through a rotary table bearing, the torque motor is arranged between the rotary table and the box body seat, a stator and a rotor of the torque motor are respectively fixedly connected with the box body seat and the rotary table, and the relative position between the rotary table and the box body seat is fixed through the locking component.
2. A direct drive rotary table as claimed in claim 1 wherein said turntable bearing is located at an upper portion of said turntable/said housing base, said torque motor is located at a middle portion of said turntable/said housing base, and said locking assembly is located at a lower portion of said turntable/said housing base.
3. The direct-drive rotary table according to claim 2, wherein the rotary table is a circular truncated cone structure, a circular mounting groove adapted to the rotary table is formed in the box base, the rotary table is disposed in the circular mounting groove, the rotary table is disposed coaxially with the circular mounting groove, and an upper end of an outer side surface of the rotary table is rotatably connected to an upper end of an inner side surface of the circular mounting groove through the rotary table bearing.
4. A direct drive type rotary table as claimed in claim 3, wherein said torque motor is coaxially disposed with said turntable and said circular mounting groove, a stator of said torque motor is fixedly connected with a lower end of said circular mounting groove, and a rotor of said torque motor is fixedly connected with a lower end of said turntable.
5. The direct drive type rotary table according to claim 4, wherein the locking assembly comprises a locking ring and a hydraulic plate, the hydraulic plate is disposed in the circular mounting groove, the lower side surface of the hydraulic plate is fixedly connected with the bottom surface of the circular mounting groove, the upper side surface of the locking ring is fixedly connected with the lower end surface of the circular truncated cone, the locking ring is disposed corresponding to the hydraulic plate, a gap is disposed between the lower side surface of the locking ring and the upper side surface of the hydraulic plate, and the height of the gap is not greater than the maximum lifting stroke of the hydraulic plate.
6. The direct drive type rotary table as claimed in claim 5, wherein the locking assembly further comprises a plurality of disc springs uniformly and fixedly disposed on the upper side of the hydraulic disc, the lower ends of the disc springs are fixedly connected with the hydraulic disc, and the distance between the upper end surfaces of the disc springs and the lower side of the locking ring is smaller than the gap.
7. The direct drive type rotary table according to claim 1, further comprising an angle encoder, wherein the angle encoder is coaxially disposed with the rotary table and the circular mounting groove, the angle encoder is fixedly connected with the rotary table and the circular mounting groove, and a data output end of the angle encoder is electrically connected with a data input end of the torque motor.
8. A direct drive type rotary table as claimed in claim 7, wherein a cavity is provided between a lower end surface of said turn table and a bottom surface of said circular mounting groove, and said angle encoder is fixedly provided in said cavity.
9. The direct drive type rotary table of claim 5, wherein the turntable has a multi-stage circular truncated cone structure, the number of stages of the turntable is at least three, the diameter of the lower end of the turntable is smaller than the diameter of the upper end of the circular truncated cone, and the turntable is sequentially configured to be an upper end surface, a first side surface, a first circular truncated cone surface, a second side surface, a second circular truncated cone surface, a third side surface and a lower end surface from top to bottom;
the first round table surface of the rotary table is in movable sealing fit with the upper side surface of the box body seat, the second side surface of the rotary table is in rotatable connection with the inner side surface of the circular mounting groove through the rotary table bearing, the rotor of the torque motor is in fit with the second round table surface and the third side surface of the round table, and the rotor of the torque motor is fixedly connected with the rotary table through a countersunk screw penetrating through the rotary table.
10. A cylindrical grinding machine comprising a direct drive rotary table according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110334653.3A CN113043161A (en) | 2021-03-29 | 2021-03-29 | Direct-drive rotary worktable and cylindrical grinding machine comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110334653.3A CN113043161A (en) | 2021-03-29 | 2021-03-29 | Direct-drive rotary worktable and cylindrical grinding machine comprising same |
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| Publication Number | Publication Date |
|---|---|
| CN113043161A true CN113043161A (en) | 2021-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110334653.3A Pending CN113043161A (en) | 2021-03-29 | 2021-03-29 | Direct-drive rotary worktable and cylindrical grinding machine comprising same |
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| Country | Link |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE20001096U1 (en) * | 2000-01-22 | 2000-05-04 | FFT Flexible Fertigungstechnik GmbH & Co KG, 35325 Mücke | Turntable |
| CN102699691A (en) * | 2012-06-07 | 2012-10-03 | 天津第一机床总厂 | Precision numerical control rotary workbench |
| CN204277480U (en) * | 2014-11-21 | 2015-04-22 | 东北大学 | A kind of numerical control of machine tools rotary table |
| CN206263606U (en) * | 2016-11-16 | 2017-06-20 | 大连三垒机器股份有限公司 | Hollow type turntable |
-
2021
- 2021-03-29 CN CN202110334653.3A patent/CN113043161A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE20001096U1 (en) * | 2000-01-22 | 2000-05-04 | FFT Flexible Fertigungstechnik GmbH & Co KG, 35325 Mücke | Turntable |
| CN102699691A (en) * | 2012-06-07 | 2012-10-03 | 天津第一机床总厂 | Precision numerical control rotary workbench |
| CN204277480U (en) * | 2014-11-21 | 2015-04-22 | 东北大学 | A kind of numerical control of machine tools rotary table |
| CN206263606U (en) * | 2016-11-16 | 2017-06-20 | 大连三垒机器股份有限公司 | Hollow type turntable |
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Application publication date: 20210629 |
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