CN103128561A - Static-pressure direct drive rotating table - Google Patents
Static-pressure direct drive rotating table Download PDFInfo
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- CN103128561A CN103128561A CN2013100779374A CN201310077937A CN103128561A CN 103128561 A CN103128561 A CN 103128561A CN 2013100779374 A CN2013100779374 A CN 2013100779374A CN 201310077937 A CN201310077937 A CN 201310077937A CN 103128561 A CN103128561 A CN 103128561A
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Abstract
The invention relates to a static-pressure direct drive rotating table which comprises a base seat and a rotating plate, wherein the rotating plate is assembled on the base seat in a rolling mode through a static-pressure bearing, and the axial line of the rotating plate extends along an up-and-down direction. The static-pressure bearing is arranged in the middle part of the rotating plate. At least one circle of static-pressure bearing guide rail pair is arranged in the periphery of the static-pressure bearing between the base seat and the rotating plate. The static-pressure direct drive rotating table is small in processing amount of the rotating plate and large in axial bearing capacity.
Description
Technical field
The present invention relates to the machining auxiliary equipment, especially design a kind of static pressure direct drive turning workbench.
Background technology
At present large-size numerical control machine is just towards high speed, high accuracy, heavy duty, the future development such as multi-shaft interlocked.Wherein the high precision numerical control rotary table is the critical component of multi-shaft linkage numerical control machine, therefore the research of high precision numerical control rotary table technology is the emphasis of various countries' research competition, it relates to the development of the industrial technologies such as national defence, precision optical machinery, electronics.
Existing rotary table structure as disclosed in Chinese patent literature CN 202200044 U " a kind of static pressure rotary worktable that directly drives ", this rotary table comprises turntable housing, direct driving motor, hydrostatic bearing and rotation card, the fixing assembling of the bearing fixed ring of the stator of direct driving motor and hydrostatic bearing and turntable housing, the rotor of direct driving motor is in transmission connection by chovr body and the outside that rotates card, and the bearing rotating ring of hydrostatic bearing is by axial hydrostatic bearing rotating ring and the fixing assembling of rotation card.During work, the direct driven rotary card of the rotor of direct driving motor is rotated, and can reduce like this energy loss in transmission process, has also reduced the accumulated error in the transmission process simultaneously.but the problem that existing this rotary table exists is: the weight of rotation card and be arranged at the axial force that the weight of the workpiece to be processed on the rotation card produces and born by hydrostatic bearing fully, because the axial bearing capacity of hydrostatic bearing is limited, this is with regard to the axial bearing capacity of restricting rotation card, also limited the rotary speed of rotation card, the rotary speed of rotation card is slightly large, the axial runout of rotation card just increases, and affects machining accuracy, simultaneously in order to realize rotating the smooth rotation of card, the hydrostatic bearing rotating ring that the whole bottom surface of rotation card and face area are very large contacts fully, this just need to process fully to the whole bottom that the rotation card coordinates with the hydrostatic bearing rotating ring, the processing capacity of rotation card is larger, difficulty of processing is high, simultaneously because the volume of hydrostatic bearing is very large, also cause the difficulty of processing of hydrostatic bearing large, cost is also higher, the area that is rotatably assorted that hydrostatic bearing rotating ring and hydrostatic bearing are located is large, also increased the resistance in the hydrostatic bearing motion process, power demand to direct driving motor is larger, the rotor ring of straight power taking machine is located at the periphery of rotation card, and rotor is far away with the axial line distance of rotation card, in the process that rotor driving rotation card is rotated, easily causes the shake of rotation card, affects machining accuracy, the periphery that direct driving motor is arranged at the rotation card also easily causes direct driving motor to form electromagnetic interference to the outside.
Summary of the invention
The object of the present invention is to provide the static pressure direct drive turning workbench that a kind of rotary disk processing capacity is little and axial bearing capacity is larger,
In order to address the above problem, technical scheme of the present invention is:
A kind of static pressure direct drive turning workbench, comprise base and rotate by hydrostatic bearing and be assemblied in rotary disk on base, that axis extends along the vertical direction, described hydrostatic bearing is arranged at the middle part of described rotary disk, is provided with at least one circle hydrostatic support guideway between described base and rotary disk in the periphery of hydrostatic bearing.
Described hydrostatic support guideway comprise the lower hydrostatic support guide rail that is arranged on base and be arranged at the rotary disk bottom, coordinate with lower hydrostatic support guide rail rotating support and the upper hydrostatic support guide rail of plane contact, be equipped with the static pressure oil groove on the upper surface of described lower hydrostatic support guide rail.
Described base comprises peripheral housing and is arranged at middle part supporting in peripheral housing, and be provided with direct driving motor in the supporting of described middle part, the rotor of direct driving motor and the middle part of rotary disk are in transmission connection.
The supporting of described middle part comprises that the bearing mounting base, motor mount and the guide rail that arrange with one heart successively from the inside to the outside and be tube-in-tube structure arrange seat, the bearing fixed ring of described hydrostatic bearing is fixedly arranged on the upper end of bearing mounting base, the stator of direct driving motor is fixedly arranged on the upper end of motor mount, and described hydrostatic support guideway is arranged at described guide rail and arranges between seat and rotary disk.
Described peripheral housing top is provided with the lower seal bearing-surface of annular, and lower seal bearing-surface and hydrostatic support guideway interval arrange, and described rotary disk bottom is provided with the upper sealing bearing-surface that coordinates with the rotary seal of described lower seal bearing-surface.
The center of described rotary disk is provided with the bearing mounting hole coaxial with rotary disk, and the bearing rotating ring of described hydrostatic bearing fixedly is assemblied on the hole wall of described bearing mounting hole.
Be installed with magnetic grid on the outer peripheral face of described rotary disk; be installed with in the periphery of described magnetic grid on described base and the matching used magnetic grid read head of magnetic grid; the periphery of described magnetic grid and magnetic grid read head is covered with into the magnetic grid protective cover of hollow sleeve-like structure; the upper end of described magnetic grid protective cover is fixed on the rotary disk of described magnetic grid upper end; be provided with on described base notch up, annular deep gouge, the hole wall of described annular deep gouge and the described magnetic grid protective cover matched in clearance inserted for described magnetic grid protective cover lower end.
Beneficial effect of the present invention is: hydrostatic bearing is arranged at the middle part of rotary disk, by the periphery at hydrostatic bearing, the hydrostatic support guideway is set, the axial force that the weight of rotary disk and corresponding to be processed 's weight produces is shared by the hydrostatic support guideway, thereby increase the axial rigidity of rotary table, improve the axial bearing capacity of rotary table; In addition due to the power of the sharing effect of hydrostatic support guideway, it is very large that hydrostatic bearing does not need to do, reduced the difficulty of processing of hydrostatic bearing, simultaneously because the rotary disk bottom needs the area processed less, this has just reduced processing capacity and the difficulty of processing of rotary disk, base; Contact area between the hydrostatic support guideway is little, and the resistance that rotary disk is subject in rotation process is less, the speed of gyration that is conducive to reduce energy consumption and improves rotary disk.
Further, the rotor of direct driving motor and the middle part of rotary disk are in transmission connection, and have reduced the distance between rotor and rotary disk axis, and rotor is when driving the rotary disk rotation, and rotary disk is difficult for shake, helps to improve the machining accuracy of corresponding workpiece to be processed.
Further, direct driving motor is take base as housing, and the peripheral housing of base can play good shielding action to direct driving motor, can not produce to external world electromagnetic interference.
Description of drawings
Fig. 1 is the structural representation of an a kind of embodiment of static pressure direct drive turning workbench in the present invention;
Fig. 2 is the I place enlarged drawing in Fig. 1.
The specific embodiment
a kind of embodiment of static pressure direct drive turning workbench is as shown in Fig. 1 ~ 2: comprise base 15, direct driving motor, the rotary disk 2 that hydrostatic bearing and axis extend along the vertical direction, wherein base comprises peripheral housing 22 and is arranged at the interior middle part supporting of peripheral housing, the middle part supporting comprises that the bearing of trend connecting plate vertical with above-below direction reaches from the inside to the outside the concentric bearing mounting base 25 that is arranged on connecting plate successively, motor mount 24 and guide rail arrange seat 23, bearing mounting base, motor mount, guide rail arranges seat and peripheral housing is the cannulated sleeve structure, the stator 4 of direct driving motor fixedly is assemblied on motor mount 24 by the first screw 16, the bottom of rotary disk is fixed in the upper end of the rotor 8 of direct driving motor by the second screw 5, the bearing fixed ring 12 of hydrostatic bearing fixedly is assemblied on bearing mounting base 25 by screw, the center of rotary disk is provided with the bearing mounting hole that runs through the upper and lower end face of rotary disk, on the hole wall of the fixing assembling of the bearing rotating ring 9 of hydrostatic bearing and bearing mounting hole, fixedly be equipped with the cover plate 10 of shutoff bearing mounting hole upper end notch on rotary disk 2 by screw.The top of casing body 22 is provided with the lower seal bearing-surface 6 of annular outside, the rotary disk bottom is provided with the upper sealing bearing-surface that coordinates with the rotary seal of described lower seal bearing-surface, is provided with the hole 1 of realizing the mechanical seal of upper and lower sealing bearing-surface on the lower seal bearing-surface.Guide rail arranges seat and is provided with one with rotary disk between referring to and encloses the hydrostatic support guideway, the hydrostatic support guideway comprise the lower hydrostatic support guide rail 7 that is arranged on base and be arranged at the rotary disk bottom, coordinate with lower hydrostatic support guide rail rotating support and the upper hydrostatic support guide rail of plane contact, be equipped with the static pressure oil groove 3 for oil storage on the upper surface of lower hydrostatic support guide rail.Offer the magnetic grid mounting groove on the outer peripheral face of rotary disk; be installed with magnetic grid 19 in the magnetic grid mounting groove; periphery in magnetic grid on base is installed with and the matching used magnetic grid read head 21 of magnetic grid by the 3rd screw 20; the periphery of magnetic grid and magnetic grid read head is covered with into the magnetic grid protective cover 18 of hollow sleeve-like structure; the upper end of magnetic grid protective cover is fixed on the rotary disk 2 of magnetic grid upper end by rivet 17; be provided with on base notch up, annular deep gouge, the hole wall of annular deep gouge and the magnetic grid protective cover matched in clearance inserted for magnetic grid protective cover lower end.11 expression hydrostatic bearing oil pockets in figure; 13 expression adpting flanges.
Peripheral housing, guide rail arrange seat, motor mount and bearing mounting base and are sleeve structure, have not only reduced the weight of base, also facilitate the setting of the parts such as hydrostatic support guideway, direct driving motor, hydrostatic bearing simultaneously, and each component layouts is rationally compact; Direct driving motor does not need to arrange separately electric machine casing take base as housing again, and seat is set the while guide rail and peripheral housing shields layer by layer to direct driving motor, guaranteed that direct driving motor can not produce electromagnetic interference to the outside; The sealed rotational of upper and lower sealing bearing-surface coordinates not only further to be shared the axial force of rotary disk, and guaranteed the sealed environment of peripheral enclosure interior, helps the normal operation of each parts in peripheral housing; Rotary disk adopts to the supporting of ventricle hydrostatic bearing, can make the rotary disk motion steadily, improves the centering precision of rotary disk; Magnetic grid is installed simple and easy, allows larger alignment error, and is easy to maintenance, and contamination resistance is good.The application's advantage is that closed hydrostatic slideway (bearing) technology, direct driving motor actuation techniques, magnetic Gate measuring technique are combined, for the large-size numerical control machine turntable provides the technology supporting.Because the coefficient of friction of hydrostatic slideway is little, can make turntable that higher speed is arranged; Driving-chain in the middle of the direct driving motor direct driving technologies has been saved makes panoramic table can reach very high rotating speed and acceleration; The characteristics such as the alignment error that magnetic Gate permission is larger and contamination resistance are strong, and directly the driver of direct driving motor is controlled with magnetic Gate feedback signal, can make panoramic table have higher positioning accuracy.Due to more than, the static pressure that has satisfied large-scale vertical lathe (gear-hobbing machine, machining center) directly turns the instructions for use of platform.
In other embodiments of the invention: base can be also a solid construction; The bearing rotating ring of hydrostatic bearing can assemble with the bottom of rotary disk is fixing; The rotor of direct driving motor also can with the outside transmission of rotary disk; The magnetic grid mounting groove can not established yet, and this moment, magnetic grid also can directly be fixedly arranged on the outer peripheral face of peripheral housing; The number of turns of hydrostatic support guideway can also be Liang Quan, three circles or more.
Claims (7)
1. static pressure direct drive turning workbench, comprise base and rotate by hydrostatic bearing and be assemblied in rotary disk on base, that axis extends along the vertical direction, it is characterized in that: described hydrostatic bearing is arranged at the middle part of described rotary disk, is provided with at least one circle hydrostatic support guideway between described base and rotary disk in the periphery of hydrostatic bearing.
2. static pressure direct drive turning workbench according to claim 1, it is characterized in that: described hydrostatic support guideway comprise the lower hydrostatic support guide rail that is arranged on base and be arranged at the rotary disk bottom, coordinate with lower hydrostatic support guide rail rotating support and the upper hydrostatic support guide rail of plane contact, be equipped with the static pressure oil groove on the upper surface of described lower hydrostatic support guide rail.
3. static pressure direct drive turning workbench according to claim 1, it is characterized in that: described base comprises peripheral housing and is arranged at middle part supporting in peripheral housing, be provided with direct driving motor in the supporting of described middle part, the rotor of direct driving motor and the middle part of rotary disk are in transmission connection.
4. static pressure direct drive turning workbench according to claim 3, it is characterized in that: the supporting of described middle part comprises that the bearing mounting base, motor mount and the guide rail that arrange with one heart successively from the inside to the outside and be tube-in-tube structure arrange seat, the bearing fixed ring of described hydrostatic bearing is fixedly arranged on the upper end of bearing mounting base, the stator of direct driving motor is fixedly arranged on the upper end of motor mount, and described hydrostatic support guideway is arranged at described guide rail and arranges between seat and rotary disk.
5. static pressure direct drive turning workbench according to claim 4, it is characterized in that: described peripheral housing top is provided with the lower seal bearing-surface of annular, be provided with the upper sealing bearing-surface that coordinates with the rotary seal of described lower seal bearing-surface bottom lower seal bearing-surface and the interval setting of hydrostatic support guideway, described rotary disk.
6. static pressure direct drive turning workbench according to claim 4, it is characterized in that: the center of described rotary disk is provided with the bearing mounting hole coaxial with rotary disk, and the bearing rotating ring of described hydrostatic bearing fixedly is assemblied on the hole wall of described bearing mounting hole.
7. according to claim 1 ~ 7 described static pressure direct drive turning of any one workbench, it is characterized in that: be installed with magnetic grid on the outer peripheral face of described rotary disk, be installed with in the periphery of described magnetic grid on described base and the matching used magnetic grid read head of magnetic grid, the periphery of described magnetic grid and magnetic grid read head is covered with into the magnetic grid protective cover of hollow sleeve-like structure, the upper end of described magnetic grid protective cover is fixed on the rotary disk of described magnetic grid upper end, be provided with notch up on described base, annular deep gouge for the lower end insertion of described magnetic grid protective cover, the hole wall of described annular deep gouge and described magnetic grid protective cover matched in clearance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310077937.4A CN103128561B (en) | 2013-03-12 | 2013-03-12 | A kind of static pressure direct drive turning workbench |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310077937.4A CN103128561B (en) | 2013-03-12 | 2013-03-12 | A kind of static pressure direct drive turning workbench |
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| CN103128561A true CN103128561A (en) | 2013-06-05 |
| CN103128561B CN103128561B (en) | 2015-12-02 |
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| CN201310077937.4A Expired - Fee Related CN103128561B (en) | 2013-03-12 | 2013-03-12 | A kind of static pressure direct drive turning workbench |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103567821A (en) * | 2013-11-05 | 2014-02-12 | 明珠科技有限公司 | Full-automatic drill grinder |
| CN103624555A (en) * | 2013-11-29 | 2014-03-12 | 南京工业大学 | Static pressure heavy-load direct-drive high-accuracy rotating table |
| CN104690562A (en) * | 2015-01-29 | 2015-06-10 | 齐重数控装备股份有限公司 | Large-sized main shaft direct-drive type rotary worktable structure |
| CN104801399A (en) * | 2014-01-24 | 2015-07-29 | 上海意丰机电科技开发有限公司 | Static pressure rotary support apparatus |
| CN105500026A (en) * | 2016-01-14 | 2016-04-20 | 嘉泰数控科技股份公司 | Direct drive type pallet changer |
| CN105690111A (en) * | 2016-04-08 | 2016-06-22 | 宜昌长机科技有限责任公司 | Self-adaptive static-pressure adjustment supporting device for large rotary workbench and oil film thickness control system and method |
| CN105952798A (en) * | 2016-07-13 | 2016-09-21 | 重庆大学 | High-precision static pressure air bearing |
| CN110842592A (en) * | 2019-11-22 | 2020-02-28 | 天津百利机械装备集团有限公司中央研究院 | Conical surface closed static pressure rotary table |
| CN112782431A (en) * | 2021-04-10 | 2021-05-11 | 成都飞机工业（集团）有限责任公司 | Target positioning turntable system for reducing electromagnetic interference |
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| JP2002070861A (en) * | 2000-08-29 | 2002-03-08 | Ntn Corp | Hydrostatic gas bearing spindle |
| CN201471207U (en) * | 2009-08-20 | 2010-05-19 | 宁波海天精工机械有限公司 | Dual-direct-connection encoder detecting mechanism |
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| CN202367453U (en) * | 2011-11-26 | 2012-08-08 | 青海一机数控机床有限责任公司 | Static pressure direct drive rotating platform device of large milling turning machining center |
| CN203266133U (en) * | 2013-03-12 | 2013-11-06 | 河南科技大学 | Static-pressure direct-driven rotary workbench |
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2013
- 2013-03-12 CN CN201310077937.4A patent/CN103128561B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002070861A (en) * | 2000-08-29 | 2002-03-08 | Ntn Corp | Hydrostatic gas bearing spindle |
| CN201471207U (en) * | 2009-08-20 | 2010-05-19 | 宁波海天精工机械有限公司 | Dual-direct-connection encoder detecting mechanism |
| CN101799042A (en) * | 2010-03-12 | 2010-08-11 | 洛阳世必爱特种轴承有限公司 | Bearing unit for testing and controlling angular displacement of revolving platform |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103567821A (en) * | 2013-11-05 | 2014-02-12 | 明珠科技有限公司 | Full-automatic drill grinder |
| CN103624555A (en) * | 2013-11-29 | 2014-03-12 | 南京工业大学 | Static pressure heavy-load direct-drive high-accuracy rotating table |
| CN103624555B (en) * | 2013-11-29 | 2016-06-15 | 南京工业大学 | Static pressure heavy-load directly drives high-precision rotary working-table |
| CN104801399A (en) * | 2014-01-24 | 2015-07-29 | 上海意丰机电科技开发有限公司 | Static pressure rotary support apparatus |
| CN104690562A (en) * | 2015-01-29 | 2015-06-10 | 齐重数控装备股份有限公司 | Large-sized main shaft direct-drive type rotary worktable structure |
| CN105500026A (en) * | 2016-01-14 | 2016-04-20 | 嘉泰数控科技股份公司 | Direct drive type pallet changer |
| CN105690111A (en) * | 2016-04-08 | 2016-06-22 | 宜昌长机科技有限责任公司 | Self-adaptive static-pressure adjustment supporting device for large rotary workbench and oil film thickness control system and method |
| CN105952798A (en) * | 2016-07-13 | 2016-09-21 | 重庆大学 | High-precision static pressure air bearing |
| CN110842592A (en) * | 2019-11-22 | 2020-02-28 | 天津百利机械装备集团有限公司中央研究院 | Conical surface closed static pressure rotary table |
| CN112782431A (en) * | 2021-04-10 | 2021-05-11 | 成都飞机工业（集团）有限责任公司 | Target positioning turntable system for reducing electromagnetic interference |
| CN112782431B (en) * | 2021-04-10 | 2021-08-03 | 成都飞机工业（集团）有限责任公司 | Target positioning turntable system for reducing electromagnetic interference |
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