CN118357745A - Annular rotary workbench for machining oversized-diameter workpiece - Google Patents
Annular rotary workbench for machining oversized-diameter workpiece Download PDFInfo
- Publication number
- CN118357745A CN118357745A CN202410284600.9A CN202410284600A CN118357745A CN 118357745 A CN118357745 A CN 118357745A CN 202410284600 A CN202410284600 A CN 202410284600A CN 118357745 A CN118357745 A CN 118357745A
- Authority
- CN
- China
- Prior art keywords
- workbench
- turntable bearing
- annular
- base
- annular rotary
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000003754 machining Methods 0.000 title claims description 7
- 230000002706 hydrostatic effect Effects 0.000 claims abstract description 22
- 238000001514 detection method Methods 0.000 claims abstract description 13
- 230000005540 biological transmission Effects 0.000 claims description 17
- 239000003638 chemical reducing agent Substances 0.000 claims description 15
- 230000000694 effects Effects 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- 230000008030 elimination Effects 0.000 description 3
- 238000003379 elimination reaction Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000003801 milling Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The invention discloses an annular rotary workbench for processing an oversized-diameter workpiece, which comprises a workbench, a base, a turntable bearing and a driving device. The outer edge of the bottom of the workbench is provided with an annular hydrostatic guideway, the outer edge of the top of the base is provided with an annular hydrostatic guideway plate, the inner ring of the turntable bearing is connected with the bottom of the workbench, the outer ring of the turntable bearing is connected with the top of the base, and the outer side surface of the outer ring of the turntable bearing is provided with external teeth which can be meshed and driven with a gear at the output end of a driving device arranged in a cavity in the workbench; the annular rotary workbench further comprises a magnetic grid ruler position detection device. The invention has the following advantages: 1. the turntable bearing is arranged on the inner side of the hydrostatic guideway, and the reference circle diameter is relatively small, so that the turntable bearing is convenient to process and install; 2. the driving device is arranged in the inner cavity of the workbench and rotates along with the workbench so as to avoid damaging the structure of the inner rib plate of the base, and the driving device can be directly disassembled from the workbench in the later period so as to be convenient for maintenance; 3. the magnetic grid ruler position detection device obtains the rotation position of the workbench so as to realize accurate control of the workbench.
Description
Technical Field
The invention relates to the technical field of machining equipment, in particular to an annular rotary workbench for machining an oversized-diameter workpiece.
Background
The annular rotary workbench is an indispensable functional component such as a boring and milling machine, a gantry machining center, a numerical control gear milling machine, a gear grinding machine and the like, is a workbench for realizing one-time machining of parts in multiple working procedures, and can be used for indexing a workpiece or continuously rotary cutting the workpiece under the drive of a related system.
At present, the annular rotary worktable of the heavy machine tool mostly adopts a transmission gear ring arranged at the bottom of the worktable and matched with a motor to realize rotation, however, the transmission gear ring is generally positioned at the outer side of the annular hydrostatic guideway, so that the reference circle diameter of the transmission gear ring is overlarge. For example, an annular rotary table for processing a workpiece with a diameter of more than 10 meters has a transmission gear ring with a reference circle diameter of more than 8 meters, and the transmission gear ring has extremely high processing difficulty, difficult guarantee of processing precision and high cost. Therefore, the invention aims to provide an annular rotary workbench for processing an oversized-diameter workpiece, which realizes the rotation of the workbench through an external tooth type crossed cylindrical roller bearing, and has the advantages of simple and compact structure, convenience in assembly and wide application range.
Disclosure of Invention
In order to overcome the technical problems described in the prior art, the invention aims to provide an annular rotary workbench for processing a workpiece with an oversized diameter.
The invention provides an annular rotary workbench for processing an oversized-diameter workpiece, which comprises the following components:
The workbench is of an annular hollow structure, and an annular hydrostatic guideway is arranged at the outer edge of the bottom of the workbench;
The base is arranged below the workbench, and an annular hydrostatic guideway plate is correspondingly arranged at the outer edge of the top of the base;
The inner ring of the turntable bearing is fixedly connected with the bottom of the workbench, the outer ring of the turntable bearing is fixedly connected with the top of the base, and the outer side surface of the outer ring of the turntable bearing is provided with external teeth;
the driving device is arranged in the cavity in the workbench, a gear is arranged at the output end of the driving device, the gear is meshed with the external teeth of the turntable bearing for transmission, and the driving device and the workbench rotate together;
The annular rotary workbench further comprises a magnetic grating ruler position detection device, wherein the magnetic grating ruler position detection device comprises a magnetic grating ruler and a magnetic detector, the magnetic grating ruler is attached to the outer side face of the workbench, and the magnetic detector is mounted on the outer side face of the base.
As a preferable technical scheme, the turntable bearing is an external tooth type crossed cylindrical roller turntable bearing.
As a preferable technical scheme, the driving device comprises a driving motor, a speed reducer and a gear, wherein an output shaft of the driving motor is connected with an input shaft of the speed reducer, and an output shaft of the speed reducer is connected with the gear.
As an optimal technical scheme, the annular rotary workbench comprises two groups of driving devices, wherein any group of driving devices comprises the driving motor, the speed reducer and the gear, and the two groups of driving devices are used for realizing transmission clearance elimination.
As a preferable technical scheme, the two groups of driving devices are symmetrically arranged in the cavity in the workbench and revolve along with the annular revolving workbench.
As a preferable technical scheme, the annular hydrostatic guideway is fixed on the outer edge of the bottom of the workbench through a first fastener, and the annular hydrostatic guideway plate is fixed on the outer edge of the base through a second fastener.
As the preferable technical scheme, the inner ring of the turntable bearing is connected with the bottom of the workbench through a third fastener, and the outer ring of the turntable bearing is connected with the top of the base through a fourth fastener.
As the preferable technical scheme, the annular rotary table further comprises a magnetic detector fixing support, one end of the fixing support is used for being fixedly connected with the base, and the other end of the fixing support is used for installing a magnetic detector.
In summary, the invention has the following technical effects: the invention relates to an annular rotary workbench for processing an oversized-diameter workpiece, which comprises a workbench, a base, a turntable bearing and a driving device. The workbench is of an annular hollow structure, an annular hydrostatic guideway is arranged at the outer edge of the bottom of the workbench, an annular hydrostatic guideway plate is correspondingly arranged at the outer edge of the top of the base, an inner ring of a turntable bearing is fixedly connected with the bottom of the workbench, an outer ring of the turntable bearing is fixedly connected with the top of the base, and an outer side surface of the outer ring of the turntable bearing is provided with external teeth which can be meshed and driven with a gear arranged at the output end of a driving device which is a cavity in the workbench; in addition, the annular rotary workbench further comprises a magnetic grating ruler position detection device, wherein the magnetic grating ruler position detection device comprises a magnetic grating ruler and a magnetic detector, the magnetic grating ruler is attached to the side face of the workbench, and the magnetic detector is arranged on the side face of the base. The annular rotary workbench adopting the structure has the following advantages: 1. the turntable bearing of the annular rotary workbench is arranged on the inner side of the hydrostatic guideway, the reference circle diameter of the turntable bearing is relatively small, the turntable bearing is easier to process, and the processing precision can be ensured; 2. the driving device is arranged in the internal cavity of the workbench, so that the condition that the motor is arranged in the base to damage the structure of the rib plate in the base and further influence the bearing capacity of the base is avoided, and in addition, when the driving device is maintained in the later period, the driving device can be directly disassembled and assembled from the workbench, so that the difficulty of maintenance and repair is reduced; 3. the annular rotary workbench obtains the rotary position of the workbench through the magnetic grid ruler position detection device so as to realize accurate control of the workbench. Therefore, compared with the existing large-sized annular rotary table, the annular rotary table for processing the oversized-diameter workpiece has obvious technical advantages.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic partial cross-sectional view of an annular rotary table for machining oversized-diameter workpieces provided by some embodiments;
FIG. 2 is an assembled schematic view of a magnetic grid ruler position detection device provided in some embodiments;
Wherein the reference numerals have the following meanings:
1-a workbench and 11-a hydrostatic guideway;
2-base, 21-hydrostatic guideway plate;
31-driving motor, 32-speed reducer and 33-gear;
4-a turntable bearing, 41-an inner ring and 42-an outer ring;
51-magnetic grating ruler and 52-magnetic detector;
6-fixing the bracket.
Detailed Description
The technical solution in this embodiment will be clearly and completely described below with reference to the drawings in this embodiment. The present embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present invention, and it is therefore to be understood that various modifications and changes may be made to the present embodiments without departing from the scope of the present invention.
In the description of the present invention, unless expressly specified and limited otherwise, the term "and/or" includes any and all combinations of one or more of the associated listed items. Unless specified or indicated otherwise, the terms "connected," "fixed," and the like are to be construed broadly and are, for example, capable of being fixedly connected, detachably connected, or integrally connected, electrically connected, or signally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
Further, in the description of the present invention, it should be understood that the azimuth words described in the present embodiment are described with the angles shown in the drawings, and should not be construed as limiting the present embodiment. It will also be understood that in the context of a reference to one element or feature being connected to another element(s), it can be connected not only directly to the other element(s) but also indirectly to the other element(s) through intervening elements.
Before introducing the technical solution of the present invention, it is necessary to set forth the created background of the invention. It is common that the annular rotary table of the heavy machine tool mostly adopts a transmission gear ring arranged at the bottom of the table and matched with a motor to realize rotation, however, the transmission gear ring is generally positioned at the outer side of the annular hydrostatic guideway, so that the reference circle diameter of the transmission gear ring is overlarge. For example, an annular rotary table for processing a workpiece with a diameter of more than 10 meters has a transmission gear ring with a reference circle diameter of more than 8 meters, and the transmission gear ring has extremely high processing difficulty, difficult guarantee of processing precision and high cost. Therefore, the invention aims to provide an annular rotary workbench for processing an oversized-diameter workpiece, which realizes the rotation of the workbench through an external tooth type crossed cylindrical roller bearing, and has the advantages of simple and compact structure, convenience in assembly and wide application range.
Based on the problems, the invention provides an annular rotary table for processing a workpiece with an ultra-large diameter. Referring to fig. 1 and 2, the annular rotary table comprises a table 1, a base 2, a driving device 3 and a turntable bearing 4, wherein the table 1 is of an annular hollow structure, an annular hydrostatic guideway 11 is arranged at the outer edge of the bottom of the table 1, an annular hydrostatic guideway plate 21 is correspondingly arranged at the outer edge of the top of the base 2, an inner ring 41 of the turntable bearing 4 is fixedly connected with the bottom of the table 1, an outer ring 42 of the turntable bearing 4 is fixedly connected with the top of the base 2, and an outer tooth is arranged on the outer side surface of the outer ring 42 of the turntable bearing 4 and can be meshed with a gear 33 arranged at the output end of the driving device in the cavity inside the table 1 for transmission; in addition, the annular rotary workbench further comprises a magnetic grating ruler position detection device, wherein the magnetic grating ruler position detection device comprises a magnetic grating ruler 51 and a magnetic detector 52, the magnetic grating ruler is attached to the side face of the workbench 1, and the magnetic detector 52 is arranged on the side face of the base 2. It should be noted that, the working table 1 has a cavity therein to provide an installation space for the driving device 3, and simultaneously, the self weight of the working table 1 is reduced to reduce the bearing pressure of the working table 1 on the base 2, and the driving device 3 rotates together with the working table 1.
The annular rotary workbench adopting the structure has the following advantages: 1. the turntable bearing 4 of the annular rotary table is arranged on the inner side of the hydrostatic guideway 11, the reference circle diameter of the turntable bearing 4 is relatively smaller, the turntable bearing 4 is easier to process, and the processing precision can be ensured; 2. the driving device 3 is arranged in the inner cavity of the workbench 1, so that the situation that the motor is arranged in the base 2 to damage the rib plate structure in the base 2 and further influence the bearing capacity of the base 2 is avoided, and in addition, the driving device 3 can be directly disassembled and assembled from the workbench 1 during the later maintenance of the driving device, so that the maintenance and repair difficulty is reduced; 3. the annular rotary workbench obtains the rotary position of the workbench through the magnetic grid ruler position detection device so as to realize accurate control. Therefore, compared with the existing large-sized annular rotary table, the annular rotary table for processing the oversized-diameter workpiece has obvious technical advantages.
In some embodiments, referring to fig. 1, the turntable bearing 4 is an externally toothed crossed cylindrical roller turntable bearing. The rolling bodies of the turntable bearing 4 are crossed cylindrical rollers, so that the turntable bearing 4 can bear higher radial and axial loads and is suitable for high-load rotating bodies; in addition, the cylindrical roller bearing adopts high-quality materials and advanced heat treatment technology, has good durability and longer service life, and ensures the service stability of the annular rotary worktable.
In some embodiments, referring to fig. 1, the driving device includes a driving motor 31, a speed reducer 32, and a gear 33, wherein an output shaft of the driving motor 31 is connected to an input shaft of the speed reducer 32, and an output shaft of the speed reducer 32 is connected to the gear 33. Specifically, the driving motor 31 is connected with the speed reducer 32, and the output shaft of the speed reducer 32 is connected with the gear 33, so that the gear 33 is meshed with the outer ring 42 of the turntable bearing 4, and the outer teeth of the turntable bearing 4 are fixed, so that the stability and the accuracy of the rotary motion are ensured.
Further, in some embodiments, referring to fig. 1, the annular rotary table includes two sets of driving devices, where any set of driving devices includes the driving motor 31, the reducer 32, and the gear 33, and the two sets of driving devices can implement transmission backlash elimination. Specifically, in the annular rotary table, two groups of driving devices are symmetrically arranged, the gears 33 of the two groups of driving devices are respectively meshed with the external teeth of the turntable bearing 4 at the same time, and a pair of torques with equal sizes and opposite directions are respectively pre-applied to the driving motors 31 of the two groups of driving devices so as to ensure that one tooth surface of each of the two groups of gears is in gapless contact with the external teeth of the turntable bearing 4, thereby realizing transmission and backlash elimination. Further, referring to fig. 1, two sets of driving devices 3 are symmetrically arranged in the cavity of the table 1 and revolve along with the annular revolving table 1.
In some embodiments, referring to fig. 1, the annular hydrostatic rail 11 is fixed to the outer edge of the bottom of the table 1 by a first fastener, and the annular hydrostatic rail plate 21 is fixed to the outer edge of the base 2 by a second fastener; the inner ring 41 of the turntable bearing 4 is connected with the bottom of the workbench 1 through a third fastener, and the outer ring 42 of the turntable bearing 4 is connected with the top of the base 2 through a fourth fastener. In the invention, the first, second, third and fourth fasteners can be any one type or combination type of fasteners such as bolts, screws and pins, and the invention is not particularly limited to the above, and can be stably connected only by meeting the requirement of the structure.
In some embodiments, referring to fig. 2, the annular rotary table further includes a magnetic detector 52 and a fixing bracket 6, one end of the fixing bracket 6 is fixedly connected to the base 2, and the other end of the fixing bracket 6 is used for installing the magnetic detector 52. Specifically, in this embodiment, the fixing support 6 is of a split structure, one end of the fixing support is fixedly connected with the base 2, and the other end of the fixing support is used for installing the magnetic detector 52, which should be noted that the fixing support 6 is not particularly limited in the present invention, and in some other embodiments, the fixing support 6 may be of an integral structure, and it is only required to satisfy that the magnetic detector 52 and the magnetic grating ruler 51 can be read through non-contact installation, and preferably, the installation distance between the magnetic detector 52 and the magnetic grating ruler 51 is 0.1-2mm.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. An annular rotary table for machining an oversized workpiece, comprising:
The workbench is of an annular hollow structure, and an annular hydrostatic guideway is arranged at the outer edge of the bottom of the workbench;
The base is arranged below the workbench, and an annular hydrostatic guideway plate is correspondingly arranged at the outer edge of the top of the base;
The inner ring of the turntable bearing is fixedly connected with the bottom of the workbench, the outer ring of the turntable bearing is fixedly connected with the top of the base, and the outer side surface of the outer ring of the turntable bearing is provided with external teeth;
the driving device is arranged in the cavity in the workbench, a gear is arranged at the output end of the driving device, the gear is meshed with the external teeth of the turntable bearing for transmission, and the driving device and the workbench rotate together;
The annular rotary workbench further comprises a magnetic grating ruler position detection device, wherein the magnetic grating ruler position detection device comprises a magnetic grating ruler and a magnetic detector, the magnetic grating ruler is attached to the outer side face of the workbench, and the magnetic detector is mounted on the outer side face of the base.
2. The annular rotary table of claim 1 wherein the turntable bearing is an externally toothed crossed cylindrical roller turntable bearing.
3. The annular rotary table according to claim 1, wherein the driving means comprises a driving motor, a speed reducer, and a gear, an output shaft of the driving motor is connected to an input shaft of the speed reducer, and an output shaft of the speed reducer is connected to the gear.
4. A circular rotary table according to claim 3, comprising two sets of drive means, any one of which comprises the drive motor, the reducer and the gear, both sets of drive means being arranged to effect transmission backlash.
5. The annular rotary table according to claim 4, wherein two sets of said drive means are disposed at symmetrical angles within said table interior cavity and revolve with the annular rotary table.
6. The annular rotary table of claim 1 wherein the annular hydrostatic rail is secured to the table bottom outer edge by a first fastener and the annular hydrostatic rail plate is secured to the base outer edge by a second fastener.
7. The annular rotary table of claim 1 wherein the inner race of the turntable bearing is connected to the table bottom by a third fastener and the outer race of the turntable bearing is connected to the base top by a fourth fastener.
8. The annular rotary table of claim 1 further comprising a magnetic detector mounting bracket, one end of the mounting bracket being adapted for fixedly connecting to the base and the other end of the mounting bracket being adapted for mounting a magnetic detector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410284600.9A CN118357745A (en) | 2024-03-13 | 2024-03-13 | Annular rotary workbench for machining oversized-diameter workpiece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410284600.9A CN118357745A (en) | 2024-03-13 | 2024-03-13 | Annular rotary workbench for machining oversized-diameter workpiece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118357745A true CN118357745A (en) | 2024-07-19 |
Family
ID=91887041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410284600.9A Pending CN118357745A (en) | 2024-03-13 | 2024-03-13 | Annular rotary workbench for machining oversized-diameter workpiece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118357745A (en) |
-
2024
- 2024-03-13 CN CN202410284600.9A patent/CN118357745A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10281007B2 (en) | Speed reducer | |
| EP0086393B1 (en) | Speed reducer and method for reducing backlash | |
| EP1309071A2 (en) | Rotating electric machine | |
| CN110788633A (en) | Cradle type composite rotary table | |
| US20210310552A1 (en) | Transverse cycloidal-pin gear pair and nutation deceleration device | |
| JP2019215081A (en) | Transmission assembly | |
| CN108747438A (en) | Linear drives rotary table | |
| US20210010565A1 (en) | Planetary gearbox and associated robot joint and robot | |
| CN114012458A (en) | Combined type backlash-free precise large-torque rotary table | |
| US20080105072A1 (en) | Rotary holding device for a machining apparatus | |
| CN118357745A (en) | Annular rotary workbench for machining oversized-diameter workpiece | |
| CN112475945A (en) | Precise rotary worktable | |
| US4838741A (en) | Method for making an epicyclic speed reducer with two stage integral rotor | |
| US4668133A (en) | Boring bar assembly | |
| CN110578780A (en) | Dual-drive sliding screw transmission pair and micro-feeding device formed by same | |
| CN105817905B (en) | A kind of variable-ratio slewing equipment | |
| US20200116234A1 (en) | Angle geared motor | |
| CN212886226U (en) | Five revolving stages of two workstations | |
| CN210108295U (en) | Planetary gear rotary table | |
| US6652406B2 (en) | Transmission | |
| CN109458452B (en) | Gear engagement gap adjusting mechanism | |
| EP3486510B1 (en) | Module bearing and power transmission device including same | |
| CN205630540U (en) | Variable -ratio slewer | |
| JP2018075645A (en) | Tool diameter variable main shaft apparatus | |
| JP2004338007A (en) | Rotary drive mechanism, table device, tool spindle device, and machine tool |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |