CN205552014U - Large -scale rotary worktable self -adaptive control static pressure strutting arrangement - Google Patents
Large -scale rotary worktable self -adaptive control static pressure strutting arrangement Download PDFInfo
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- CN205552014U CN205552014U CN201620288121.5U CN201620288121U CN205552014U CN 205552014 U CN205552014 U CN 205552014U CN 201620288121 U CN201620288121 U CN 201620288121U CN 205552014 U CN205552014 U CN 205552014U
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Abstract
The utility model relates to a large -scale rotary worktable self -adaptive control static pressure strutting arrangement, it includes work spindle, the last fixed mounting of work spindle has the worm wheel, the worm wheel constitutes the worm gear transmission with the worm, the lower side end face fixed mounting of worm wheel has the terminal surface guide rail, main shaft static pressure cover is connected with work spindle through the screw, the terminal surface guide rail cooperatees with static pressure oil pocket piece, static pressure oil pocket piece fixed mounting is on the table base, the table base links to each other with the ground is fixed, the central fixed mounting of table base has centering static pressure axle sleeve, centering static pressure axle sleeve cooperatees with main shaft static pressure cover, the inside processing of centering static pressure axle sleeve has the fuel feeding passageway, and the fuel feeding passageway links to each other with oil feeding system. Satisfy the harsh requirement in small clearance between work spindle and the centering static pressure axle sleeve on the one hand, on the other hand realizes the intelligent control to static pressure film thickness.
Description
Technical field
This utility model relates to platen device field, particularly relates to the support structure designs of worktable rotary parts and the intelligent regulating device of static pressure film thickness.
Background technology
Huge revolving table is the core functional components of machine industry boring machine, milling machine, machining center and gear cutting machine etc., and its performance indications directly affect the lathe machining accuracy to workpiece.Workbench is as tumbler, it is necessary to meets working table movement stability requirement by bearing support structure reasonable in design, thus improves the machining accuracy of complete machine tool.Mechanical ball bearing is a kind of supporting construction scheme, but workbench is just towards precise heavy-load trend development, this mode is proposed the highest requirement to reliability and the bearing capacity of ball bearing, and the technology development of current mechanical ball bearing can not meet the most far away the application scenario of large-scale heavy duty workbench.At present, the commonplace technical scheme using similar static-pressure sliding bearing operation principle, i.e. inject between turntable tumbler and stator component certain flow, certain pressure hydraulic oil as working media, and then workbench is played a supporting role.Though the industrialization of this technology, for current product, this technology exist in actual application below 2 difficulties and actual defects:
1) gap between workbench tumbler and main shaft needs precision to control
In order to ensure robust motion and the positioning precision of turntable, gap width between the most above-mentioned tumbler of oil film thickness and centering main shaft has to pass through strict Theoretical Calculation and obtains (typically about 3-4 silk), and also to guarantee that actual gap value is consistent with Design Theory value by taking reasonably to manufacture with assembly technology.But for bulky large-scale workbench, if to ensure above-mentioned clearance requirement, manufacture and assembly difficulty certainly will be increased.
2) oil film thickness of Supporting Media is lacked Intelligent adjustment
For workbench, ideally wish that oil film thickness remains constant, but, when workbench load subjected to becomes big, Supporting Media oil film certainly will be produced extruding, now oil film thickness will change, if the control oil film thickness that do not takes reasonable measure is stable in design load, so workbench will be subjected to displacement on loading direction, and then affects the machining accuracy of whole set equipment.
Based on current static pressure workbench above shortcomings, this utility model is designed by rational structure and uses and can the control program of Automatic adjusument oil film thickness improve in place of the deficiencies in the prior art.
Disclosed in application publication number CN103878600, twin worm disappears gap static pressure closed-loop workbench in one, can eliminate the gap of workbench main shaft, but it may be only available for the occasion that requirement on machining accuracy is relatively low, and use taper seat to position, and positioning precision cannot ensure.
Utility model content
The purpose of this utility model is on the one hand in order to meet the rigors of minim gap between workbench main shaft and centering static pressure axle sleeve；On the other hand realize the Based Intelligent Control to static pressure film thickness, propose organization plan and the control system of Automatic adjusument oil film thickness of a kind of improvement.
For reaching above-mentioned purpose, the design of utility model is: huge revolving table Automatic adjusument static pressure supporting device, it includes workbench main shaft, worm gear it is installed with on workbench main shaft, worm gear constitutes Worm Wheel System with worm screw, the downside end face of worm gear is installed with end face guide rail, Spindle Static gland is connected with workbench main shaft by screw, end face guide rail matches with static-pressure oil chamber block, static-pressure oil chamber block is fixedly mounted on table base, table base is fixedly linked with ground, the center of table base is installed with centering static pressure axle sleeve, centering static pressure axle sleeve matches with Spindle Static gland；Being machined with oil supply gallery inside described centering static pressure axle sleeve, oil supply gallery is connected with oil supply system.
Described oil supply gallery includes main oil-feed port, and the processing of main oil-feed port is on centering static pressure axle sleeve, and main oil-feed port is connected with oil supply pipe, and oil supply gallery has been sequentially communicated axial oil feed line and radial direction oil feed line.
Described static-pressure oil chamber block uses sector structure, has 12 pieces, by the uniform upper surface being arranged on table base of screw.
Being passed through hydraulic oil by axial oil feed line between described end face guide rail and static-pressure oil chamber block axially to support end face guide rail and pivoting part, its gap is 0.03-0.04mm.
The cooperation face of described Spindle Static gland and centering static pressure axle sleeve is passed through hydraulic oil by radially oil feed line and carries out Spindle Static gland and pivoting part radially supporting, and its gap is 0.03-0.04mm.
The main body of described Spindle Static gland uses No. 35 structural steel, one layer of bus alloy of face casting that Spindle Static gland matches with centering static pressure axle sleeve.
Utility model has the advantages that:
1, ensure that the face A of workbench main shaft by installing Spindle Static gland on original workbench main shaft and feel relieved static pressure axle sleeve gap in the range of 0.03-0.04mm, and traditional method is it is difficult to ensure that its gap, because for huge revolving table, workbench main shaft 1 is the most bulky but also quality weight, on the one hand it is not easy to meet design requirement in the course of processing, and during assembling, it is also extremely difficult for adjusting the workbench main shaft 1 micro-displacement on the 0.01mm order of magnitude, so the individually designed Spindle Static gland 3 of this utility model, as long as ensureing the face B of Spindle Static gland 3 and feeling relieved static pressure axle sleeve 7 gap in the range of 0.03-0.04mm.
2, by using No. 35 structural steel as the body of Spindle Static gland 3, at the inner surface that needs contact with oil film, one layer of bus alloy is added by casting process, it is possible to increase the service life of Spindle Static gland and wearability.
3, by using oil film thickness detecting system, the axial displacement signal of workbench main shaft can be detected constantly, and then axial displacement signal is fed back to controller, the fuel feeding supported by controller Reverse Turning Control static pressure, readjust oil film thickness, and then formation closed-loop control system, improve control accuracy.
4, the eddy current displacement sensor used has the advantages that precision is high, it is possible to timely accurate measurement displacement signal also feeds back to controller.
5, by installing Spindle Static gland, diameter only has 1.45 meters, weight only has 1.5 tons, thus can be by the manufacture of centering static pressure axle sleeve and assembling be controlled, and then meet the design requirement of oil clearance, compare traditional mode, the improvement designed by this structure, greatly reduce manufacture and assembly difficulty, also improve the precision of whole turntable.
6, by oil film thickness detecting system, the change of oil film thickness can be monitored in real time, and oil pump flow can be regulated by control system, make oil film thickness remain in optimum range.
Accompanying drawing explanation
With embodiment, utility model is described further below in conjunction with the accompanying drawings.
Fig. 1 is overall structure schematic diagram of the present utility model.
Fig. 2 is Spindle Static gland structural representation of the present utility model.
Fig. 3 is the fundamental diagram of oil film thickness detecting system of the present utility model.
In figure: workbench main shaft 1, worm gear 2, Spindle Static gland 3, end face guide rail 4, table base 5, static-pressure oil chamber block 6, centering static pressure axle sleeve 7, worm screw 8, main oil-feed port 9, axial oil feed line 10, radially oil feed line 11, bus alloy 12, controller 13, frequency conversion motor 14, multi-head pump 15, hydrostatic slideway 16, workbench 17, eddy current displacement sensor 18.
Detailed description of the invention
Below in conjunction with the accompanying drawings the embodiment of utility model is described further.
Embodiment 1:
See Fig. 1-2, huge revolving table Automatic adjusument static pressure supporting device, it includes workbench main shaft 1, worm gear 2 it is installed with on workbench main shaft 1, worm gear 2 and worm screw 8 constitute Worm Wheel System, the downside end face of worm gear 2 is installed with end face guide rail 4, Spindle Static gland 3 is connected with workbench main shaft 1 by screw, end face guide rail 4 matches with static-pressure oil chamber block 6, static-pressure oil chamber block 6 is fixedly mounted on table base 5, table base 5 is fixedly linked with ground, the center of table base 5 is installed with centering static pressure axle sleeve 7, centering static pressure axle sleeve 7 matches with Spindle Static gland 3；Described centering static pressure axle sleeve 7 is internal is machined with oil supply gallery, and oil supply gallery is connected with oil supply system.
Further, described oil supply gallery includes that main oil-feed port 9, main oil-feed port 9 are processed on centering static pressure axle sleeve 7, and main oil-feed port 9 is connected with oil supply pipe, and oil supply gallery has been sequentially communicated axial oil feed line 10 and radial direction oil feed line 11.
Further, described static-pressure oil chamber block 6 uses sector structure, has 12 pieces, by the uniform upper surface being arranged on table base 5 of screw.
Further, being passed through hydraulic oil by axial oil feed line 10 and axially support end face guide rail 4 and pivoting part between described end face guide rail 4 and static-pressure oil chamber block 6, its gap is 0.03-0.04mm.
Further, the cooperation face of described Spindle Static gland 3 and centering static pressure axle sleeve 7 is passed through hydraulic oil by radially oil feed line 11 and carries out Spindle Static gland 3 and pivoting part radially supporting, and its gap is 0.03-0.04mm.
Further, the main body of described Spindle Static gland 3 uses No. 35 structural steel, one layer of bus alloy 12 of face casting that Spindle Static gland 3 matches with centering static pressure axle sleeve 7.
nullFurther，Without the Spindle Static gland 3 in this utility model，The face A of workbench main shaft 1 to be ensured is extremely difficult with centering static pressure axle sleeve 7 gap in the range of 0.03-0.04mm，Because for huge revolving table，Workbench main shaft 1 is the most bulky but also quality weight，On the one hand it is not easy to meet design requirement in the course of processing，And during assembling，It is also extremely difficult for adjusting the workbench main shaft 1 micro-displacement on the 0.01mm order of magnitude，So the individually designed Spindle Static gland 3 of this utility model，As long as ensureing the face B of Spindle Static gland 3 and feeling relieved static pressure axle sleeve 7 gap in the range of 0.03-0.04mm，In order to reach this requirement，On the one hand the machining accuracy to Spindle Static gland 3 is controlled well，It is made to meet design requirement；On the other hand during assembling Spindle Static gland 3, assembly precision to be ensured.For above-mentioned 2 Spindle Static glands 3 that requirement is relatively small for volume, quality is relatively light, all it is relatively easy to realize.In order to improve service life and the wearability of Spindle Static gland 3, this utility model uses bimetallic technological design, i.e. use No. 35 structural steel as the body of Spindle Static gland 3, at the inner surface that needs contact with oil film, add one layer of bus alloy by casting process.
Embodiment 2:
Such as Fig. 3, a kind of oil film thickness detecting system for Automatic adjusument static pressure supporting device, it includes controller 13, controller 13 is connected with frequency conversion motor 14 by holding wire, frequency conversion motor 14 is connected with multi-head pump 15 by holding wire, multi-head pump 15 is connected with the main oil-feed port 9 of oil supply gallery and controls the fluid supply of axial oil feed line 10 and radial direction oil feed line 11, and then control the oil film thickness of hydrostatic slideway 16, the top of hydrostatic slideway 16 is provided with workbench 17, workbench 17 is arranged on the end face of workbench main shaft 1, workbench 17 is provided with eddy current displacement sensor 18, the signal output part of eddy current displacement sensor 18 is connected with controller 13 signal input part.
Embodiment 3:
nullIn order to realize the real-time monitoring and control to oil film thickness，This utility model utilizes eddy current displacement sensor，Monitoring table top is in the situation of change of axial displacement in real time，A kind of method using oil film thickness detecting system to control Automatic adjusument static pressure supporting device oil film thickness，First，Situation of change by the axial displacement of the real-time monitoring platform of eddy current displacement sensor 18 17，Workbench main shaft 1 45 ° every turn，Eddy current displacement sensor 18 reads displacement once，360 ° every turn will be read 8 displacement signals，Take the meansigma methods of 8 signals，Using meansigma methods as the slippage of workbench，Slippage is fed back to signal input part，Controller generates the driving signal of frequency conversion motor，Thus change motor speed，And then change the flow of multi-head pump，Control the fuel delivery of oil supply gallery，And then regulation oil film thickness，Oil film thickness is made to be in preferable state after feedback adjustment the most repeatedly，Form a complete closed-loop control system.
Detailed control flow is: the measurement of oil film uses high-precision eddy current displacement sensor 18, analog quantity current signal i will be exported after measuring changes delta h of displacement, and signal is passed to controller, the driving signal u of multi-head pump motor is converted the signal to by controller, then the rotational speed omega of motor is changed, after multi-head pump connects the tach signal obtaining frequency conversion motor, the corresponding flow Q regulating multi-head pump, hydrostatic slideway produces corresponding hydraulic pressure and offsets the load Δ W applied on the table, finally make oil film thickness within optimized scope, form a complete closed-loop control system model.
Specific works process of the present utility model and operation principle be:
Static pressure rotary worktable mainly includes rotator assembly and fixed body assembly two parts, and wherein, rotator assembly includes: workbench main shaft, worm gear, Spindle Static gland, end face guide rail；Fixed body assembly includes: table base, static-pressure oil chamber block, centering static pressure axle sleeve.In order to realize oil film thickness according to load change Intelligent adjustment, by installing the change in displacement of eddy current displacement sensor real-time monitoring table top, the change of work top displacement here reflects the change of oil film thickness the most indirectly, change in displacement signal sensor acquisition arrived is as the input signal of control system, the rotating speed of instruction regulation Oil pump electrical machinery is sent by control system, i.e. regulate the output flow of oil pump, until the oil film thickness of change loaded returns to design load, realize the oil film thickness Automatic adjusument with load change through above-mentioned closed loop control.
The power source of work table rotation action is motor, and driven by motor worm screw rotates, and worm screw by engaging drive worm gear wheel with worm gear, and worm gear is fixing with workbench main shaft to be connected, it is achieved the gyration of workbench；Support to runner assembly is divided into the support of radial and axial both direction, in the axial direction, static pressure oil film between static-pressure oil chamber block and end face guide rail serves axial supporting role to the runner assembly of rotary table, wherein end face guide rail is integrally fixed at above worm gear and rotates therewith, it is uniformly distributed 12 pieces of fan-shaped static-pressure oil chamber blocks at circumferencial direction to be fixed on table base, is fixed；nullIn radial directions，Using centering static pressure axle sleeve as the positioning datum of axial centre，The gap of 0.03-0.04mm is left between the Spindle Static gland and the centering static pressure axle sleeve that are fixed on workbench main shaft，Because the radial direction of workbench runner assembly is supported the most stable by the oil film thickness guarantee in the range of this，But for large-scale workbench，From manufacturing and in terms of assembling，It is extremely difficult for controlling this gap width，Without Spindle Static gland individually designed in this utility model，In order to ensure above-mentioned gap width，On the one hand the workbench main shaft endoporus machining accuracy of external diameter 2.5 meters is accurately controlled，In addition，Also will being accurately positioned the nearly 8 tons of heavy workbench main shafts that weigh assembling when，Only accomplish that could control oil clearance the most accurately in the range of 0.03-0.04mm at above-mentioned 2，Obviously above-mentioned 2 points are accomplished，It is extremely difficult.Therefore the individually designed centering static pressure axle sleeve of this utility model, it is mounted on workbench main shaft, diameter only has 1.45 meters, weight only has 1.5 tons, thus by being controlled the manufacture of centering static pressure axle sleeve and assembling, and then can meet the design requirement of oil clearance, compare traditional mode, the improvement designed by this structure, is greatly reduced manufacture and assembly difficulty, also improves the precision of whole turntable.
In conjunction with accompanying drawing, the embodiment of utility model is explained in detail, but utility model is not limited to above-mentioned embodiment.Above-described embodiment all in claims, can be modified by technical staff without prejudice to the innovative point of utility model and operating procedure.The protection domain of utility model, should cover such as claims of utility model.
Claims (6)
1. huge revolving table Automatic adjusument static pressure supporting device, it includes workbench main shaft (1), worm gear (2) it is installed with on workbench main shaft (1), worm gear (2) constitutes Worm Wheel System with worm screw (8), it is characterized in that: the downside end face of worm gear (2) is installed with end face guide rail (4), Spindle Static gland (3) is connected with workbench main shaft (1) by screw, end face guide rail (4) matches with static-pressure oil chamber block (6), static-pressure oil chamber block (6) is fixedly mounted on table base (5), table base (5) is fixedly linked with ground, the center of table base (5) is installed with centering static pressure axle sleeve (7), centering static pressure axle sleeve (7) matches with Spindle Static gland (3)；Described centering static pressure axle sleeve (7) is internal is machined with oil supply gallery, and oil supply gallery is connected with oil supply system.
Huge revolving table Automatic adjusument static pressure supporting device the most according to claim 1, it is characterized in that: described oil supply gallery includes main oil-feed port (9), main oil-feed port (9) processing is in centering static pressure axle sleeve (7), main oil-feed port (9) is connected with oil supply pipe, and oil supply gallery has been sequentially communicated axial oil feed line (10) and radial direction oil feed line (11).
Huge revolving table Automatic adjusument static pressure supporting device the most according to claim 1, it is characterised in that: described static-pressure oil chamber block (6) uses sector structure, has 12 pieces, by the uniform upper surface being arranged on table base (5) of screw.
Huge revolving table Automatic adjusument static pressure supporting device the most according to claim 1, it is characterized in that: being passed through hydraulic oil by axial oil feed line (10) between described end face guide rail (4) and static-pressure oil chamber block (6) and axially support end face guide rail (4) and pivoting part, its gap is 0.03-0.04mm.
Huge revolving table Automatic adjusument static pressure supporting device the most according to claim 1, it is characterized in that: the cooperation face of described Spindle Static gland (3) and centering static pressure axle sleeve (7) is passed through hydraulic oil by radially oil feed line (11) and carries out Spindle Static gland (3) and pivoting part radially supporting, and its gap is 0.03-0.04mm.
Huge revolving table Automatic adjusument static pressure supporting device the most according to claim 1, it is characterized in that: the main body of described Spindle Static gland (3) uses No. 35 structural steel, one layer of bus alloy (12) of face casting that Spindle Static gland (3) matches with centering static pressure axle sleeve (7).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620288121.5U CN205552014U (en) | 2016-04-08 | 2016-04-08 | Large -scale rotary worktable self -adaptive control static pressure strutting arrangement |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620288121.5U CN205552014U (en) | 2016-04-08 | 2016-04-08 | Large -scale rotary worktable self -adaptive control static pressure strutting arrangement |
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| CN205552014U true CN205552014U (en) | 2016-09-07 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109128868A (en) * | 2018-04-27 | 2019-01-04 | 湖北工业大学 | A kind of static pressure workbench oil film thickness method based on application factor method |
-
2016
- 2016-04-08 CN CN201620288121.5U patent/CN205552014U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109128868A (en) * | 2018-04-27 | 2019-01-04 | 湖北工业大学 | A kind of static pressure workbench oil film thickness method based on application factor method |
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