CN102581408A - Sealing structure of fully-immersed numerically controlled rotating table for electrical processing machine tool and sealing method thereof - Google Patents
Sealing structure of fully-immersed numerically controlled rotating table for electrical processing machine tool and sealing method thereof Download PDFInfo
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- CN102581408A CN102581408A CN2012100753789A CN201210075378A CN102581408A CN 102581408 A CN102581408 A CN 102581408A CN 2012100753789 A CN2012100753789 A CN 2012100753789A CN 201210075378 A CN201210075378 A CN 201210075378A CN 102581408 A CN102581408 A CN 102581408A
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- 238000007789 sealing Methods 0.000 title claims abstract description 61
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000012545 processing Methods 0.000 title abstract description 5
- 239000007788 liquid Substances 0.000 claims abstract description 25
- 230000003068 static effect Effects 0.000 claims abstract description 25
- 238000005267 amalgamation Methods 0.000 claims description 12
- 238000010276 construction Methods 0.000 claims description 10
- 239000000523 sample Substances 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 6
- 230000005540 biological transmission Effects 0.000 abstract 2
- 238000012544 monitoring process Methods 0.000 abstract 1
- 239000012224 working solution Substances 0.000 description 11
- 238000003754 machining Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention discloses a sealing structure of fully-immersed numerically controlled rotating table for an electrical processing machine tool and a sealing method of the sealing structure. The sealing structure disclosed by the invention is characterized in that: the numerically controlled rotating table comprises a cabinet, a rotating table surface and a driving motor, wherein the driving motor is installed in an inner cavity of the cabinet, the rotating table surface is arranged on the external part of the cabinet, and the driving motor is connected with the rotating table surface by a transmission element passing through the cabinet; a static sealing structure and a dynamic sealing structure are arranged on the cabinet, one sealing cavity is formed by the cabinet, the transmission element, the dynamic sealing structure and the static sealing structure, and the cabinet is provided with a inflating opening with one end connected with the sealing cavity and the other end connected with an air pump. The air pump inflates the gas to the sealing cavity so that the gas pressure in the sealing cavity is greater than the liquid pressure corresponding to the lowest point position of the numerically controlled rotating table in the liquid, thereby forming a pressure auxiliary sealing. The technical scheme not only has reliable sealing effect, but also can play a monitoring action for the leakage points on the numerically controlled rotating table.
Description
Technical field
The present invention relates to electrical process machine NC rotary table field, be specifically related to a kind of electrical process machine full immersed type NC rotary table hermetically-sealed construction and encapsulating method.
Background technology
In the electric machining field; Have and partly soak under the formula liquid operational outfit under the operational outfit and full immersed type liquid; Refer to operational outfit and partly immerse or all immerse in the working solution, working solution is discharge medium, to form the spark-over discharge channel; And after discharge finishes, recover the state of insulation in gap rapidly, also play effects such as cooling workpiece in addition.General working solution is a kerosene, and electrolyte, deionized water and special-purpose electric machining liquid are also arranged.NC rotary table is a kind of very practical process equipment; Can realize rotary feed and dividing movement; Generally include casing, work top, drive motors (being generally servomotor) and driving member structures such as (Worm and worm-wheel gearing or reductors etc.), the accurate digital control rotary table of various special uses can satisfy the electric machining requirement of various precision workpiece.Full immersed type NC rotary table stage body in the electric machining field all immerses in the working solution works; Because costing an arm and a leg of accurate digital control rotary table; Therefore extremely important to its protection, wherein most important is exactly sealing problem, will avoid the electric machining etched matter in working solution and the working solution to pour in the inner chamber of casing exactly; Guarantee that drive motors wherein is not impaired, guarantee its operate as normal and service life.
Summary of the invention
The object of the invention provides a kind of electrical process machine full immersed type NC rotary table hermetically-sealed construction and encapsulating method, has both had reliable sealing effect, can light supervisory function bit to the leakage on the NC rotary table again.
For achieving the above object; The technical scheme that the present invention adopts is: a kind of electrical process machine full immersed type NC rotary table hermetically-sealed construction, and said NC rotary table comprises casing, rotary table face and drive motors, wherein; Casing has an inner chamber; Drive motors is installed in the inner chamber of casing, and the rotary table face is positioned at the outside of casing, drive motors through one pass casing driving member be connected with the rotary table face; Said casing is made up of two parts amalgamation at least; Edge joint position in amalgamation is provided with static seal structure, passes the casing place at said driving member and is provided with movable sealing structure, and casing, driving member, movable sealing structure and static seal structure surround an annular seal space; On casing, be provided with an inflation inlet; One end of this inflation inlet is communicated with annular seal space, and the other end is communicated with an air pump, and relatively movable sealing structure and static seal structure form a kind of vapour-pressure type auxiliary seal in annular seal space with this.
Related content in the technique scheme is explained as follows:
1, in the such scheme, said static seal structure is meant two hermetically-sealed constructions between the stationary parts, comprises " O " type rubber ring, rectangular washer, fluid sealant etc.
2, in the such scheme, said movable sealing structure is meant the hermetically-sealed construction between the relative movement part, mainly comprises contact seal structures such as packing seal and sylphon seal.
3, in the such scheme, the probe of said pressure sensor stretches in the said annular seal space, and pressure sensor is connected with said air pump through a control circuit.
4, in the such scheme, said movable sealing structure is specially oil sealing, and this oil sealing refers to two-way rotation combination sealing oil sealing.
The present invention also provides a kind of electrical process machine full immersed type NC rotary table encapsulating method; In the full immersed type NC rotary table; Drive motors is installed in the inner chamber of a casing; The rotary table face is positioned at the outside of casing, drive motors through one pass casing driving member be connected with the rotary table face; Said casing is made up of two parts amalgamation at least, adopts static seal structure to seal at the edge joint position of amalgamation, passes the casing place at said driving member and adopts movable sealing structure to seal, and makes the inner chamber of casing form an annular seal space with this; To said annular seal space one inflation inlet is set on casing; One end of this inflation inlet is communicated with annular seal space; The other end is communicated with an air pump, is being immersed in when NC rotary table under the duty of liquid, and said air pump charges into gas in annular seal space; So that the gas pressure intensity in the sealing chamber constitutes a kind of vapour-pressure type auxiliary seal greater than the pairing liquid pressure of NC rotary table lowest point in liquid with this annular seal space that is formed by movable sealing structure and static seal structure relatively.
In the such scheme, set gas pressure intensity lower limit and gas pressure intensity limiting value, according to the bearing capacity setting gas pressure intensity higher limit of the annular seal space of NC rotary table according to the pairing liquid pressure value of NC rotary table lowest point in liquid; Adopt a pressure sensor to detect the gas pressure intensity in the annular seal space; Control circuit start air pump when the gas pressure intensity in the annular seal space is lower than the gas pressure intensity lower limit; Control circuit alarm when the gas pressure intensity in the annular seal space is lower than the gas pressure intensity limiting value, control circuit cuts out air pump when the gas pressure intensity in the annular seal space is higher than the gas pressure intensity higher limit.
Operation principle of the present invention is: casing, driving member, movable sealing structure and static seal structure surround an annular seal space; Need the drive motors of protection to be installed in the annular seal space of casing; Relative movable sealing structure and static seal structure form a kind of vapour-pressure type auxiliary seal in annular seal space; Air pump charges into gas through inflation inlet in annular seal space, the annular seal space internal gas pressure is increased, and forms malleation in the annular seal space.Movable sealing structure on the casing or static seal structure all have certain life-span; When slight leakages of movable sealing structure or static seal structure occurring because of for example ring wear or aging (movable sealing structure more is prone to leakage); Gas in the annular seal space is emerged from this leakage mouth; The staff just can be observed liquid level has minute bubbles to emerge, and just can in time react; When revealing relatively seriously; Because of sealing the air pressure that intracavity gas has; Can stop temporarily that working solution infiltrates in the chassis cavity immediately, promptly the gas itself in the annular seal space also plays the sealing function of certain hour section, infiltrates the drive motors of infringement interior in the chassis cavity to avoid working solution.Set gas pressure intensity lower limit, gas pressure intensity higher limit and gas pressure intensity limiting value; Pressure sensor detects when the interior gas pressure intensity of annular seal space is lower than the gas pressure intensity lower limit and controls the circuit start air pump to the sealing interacvity air-filling; Control circuit alarm when pressure sensor detects gas pressure intensity in the annular seal space and is lower than the gas pressure intensity limiting value (this kind situation possibly be because air pump damages or other reasons makes the air pump can not be normally to the sealing interacvity air-filling); Control circuit cut out air pump when pressure sensor detected gas pressure intensity in the annular seal space and is higher than the gas pressure intensity higher limit; Stop to the sealing interacvity air-filling, avoid the too high and infringement that parts are brought of annular seal space internal cause gas pressure intensity.
Because the technique scheme utilization, the present invention compared with prior art has advantage and effect:
1, because the present invention had both had sealing function to the NC rotary table that liquid moves down; Can monitor the seal leakage problem in real time again, avoid working solution to pour into the parts such as drive motors that damage in the casing of NC rotary table wherein, simple in structure; Cost is low, reliable operation.
2, because the present invention can make NC rotary table be applicable to the different depth in the working solution through the gas pressure intensity value in the adjustment annular seal space, use more flexible.
Description of drawings
Accompanying drawing 1 is an embodiment of the invention structural representation;
Accompanying drawing 2 is a working state structure sketch map under the embodiment of the invention liquid;
Accompanying drawing 3 is the control circuit block diagram of the embodiment of the invention.
In the above accompanying drawing: 1, casing; 2, rotary table face; 3, drive motors; 4, static seal structure; 5, movable sealing structure; 6, annular seal space; 7, inflation inlet; 8, air pump; 9, pressure sensor; 10, control circuit; 11, liquid level; 12, two way seal plug.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further described:
Embodiment: shown in accompanying drawing 1: a kind of electrical process machine full immersed type NC rotary table hermetically-sealed construction; Said NC rotary table comprises casing 1, rotary table face 2 and drive motors 3; Wherein, casing 1 has an inner chamber, and drive motors 3 is installed in the inner chamber of casing 1; Rotary table face 2 is positioned at the outside of casing 1, drive motors 3 through one pass casing 1 driving member be connected with rotary table face 2; Said casing 1 is made up of two parts amalgamation at least; Edge joint position in amalgamation is provided with static seal structure 4, passes casing 1 place at said driving member and is provided with movable sealing structure 5, and casing 1, driving member, movable sealing structure 5 and static seal structure 4 surround an annular seal space 6; On casing 1, be provided with an inflation inlet 7; One end of this inflation inlet 7 is communicated with annular seal space 6, and the other end is communicated with an air pump 8, forms a kind of vapour-pressure type auxiliary seal with this relative movable sealing structure 5 in annular seal space 6 with static seal structure 4.
Be provided with a pressure sensor 9, the probe of this pressure sensor 9 stretches in the said annular seal space 6, and pressure sensor 9 is connected with said air pump 8 through a control circuit 10.
Movable sealing structure 5 is specially oil sealing, adopts and gathers the rotatory sealing of tetrafluoro combined type.Static seal structure 4 adopts corrosion-resistant seal with O ring.
Concrete operating position is referring to shown in the accompanying drawing 2: a kind of electrical process machine full immersed type NC rotary table encapsulating method; In the full immersed type NC rotary table; Drive motors 3 is installed in the inner chamber of a casing 1; Rotary table face 2 is positioned at the outside of casing 1, drive motors 3 through one pass casing 1 driving member be connected with rotary table face 2; Said casing 1 is made up of two parts amalgamation at least, adopts static seal structure 4 to seal at the edge joint position of amalgamation, passes casing 1 place at said driving member and adopts movable sealing structure 5 to seal, and makes the inner chamber of casing 1 form an annular seal space 6 with this; To said annular seal space 6 inflation inlet 7 is set on casing 1; One end of this inflation inlet 7 is communicated with annular seal space 6; The other end is communicated with an air pump 8; Be immersed in when NC rotary table under the duty of liquid; Said air pump 8 charges into gas in annular seal space 6, so that the gas pressure intensity in the sealing chamber 6 greater than the pairing liquid pressure of NC rotary table lowest point in liquid, constitutes a kind of vapour-pressure type auxiliary seal by the annular seal space 6 that movable sealing structure 5 and static seal structure 4 form with this relatively.
Set gas pressure intensity lower limit and gas pressure intensity limiting value according to the pairing liquid pressure value of NC rotary table lowest point in liquid, according to the bearing capacity setting gas pressure intensity higher limit of the annular seal space 6 of NC rotary table; The gas pressure intensity that adopts a pressure sensor 9 to detect in the annular seal space 6; Control circuit 10 booster air pumps 8 when the gas pressure intensity in the annular seal space 6 is lower than the gas pressure intensity lower limit; Control circuit 10 control buzzer buzzings are reported to the police when the gas pressure intensity in the annular seal space 6 is lower than the gas pressure intensity limiting value, and control circuit 10 cuts out air pump 8 when the gas pressure intensity in the annular seal space 6 is higher than the gas pressure intensity higher limit.
Can in annular seal space 6, charge into the gas pressure values through adjustment air pump 8 and make NC rotary table be applicable to the different depth in the working solution, promptly therefore NC rotary table uses more flexible with respect to the degree of depth of liquid level 11.
For stretching out the electric wire position on the sealing NC rotary table, adopt two way seal plug 12 to carry out static seal.
The circuit control principle is referring to shown in the accompanying drawing 3: the general air pump 8 that adopts is a micro air pump; Pressure sensor 9 is a micro pressure sensor; Therefore the key problem in technology of vapour-pressure type auxiliary seal structure and method is the voltage detecting and the processing and amplifying of the small-signal of pressure sensor 9;, long-time stability high except the measurement synthesis precision that requires pressure sensor 9 are good; Reliability design is paid attention in prosecution to small-signal; Strengthen interference protection measures such as shielding, ground connection, power filter, therefore select for use the OP07 bipolarity operational amplifier integrated circuit of low noise, low imbalance, high open-loop gain to detect the small-signal of micro pressure sensor 9 and carry out processing and amplifying, the amplifying circuit of promptly sampling.Offset voltage adjustment circuit is adjusted offset voltage.Pressure sensor 9 detected gas pressure intensity signals convert voltage signal to, after amplifying through the sampling amplifying circuit, get into the absolute value comparison circuit and carry out the signal processing; Again through three voltage comparator circuits; Compare with reference pressure upper voltage limit, reference pressure lower voltage limit and reference pressure limiting voltage respectively, produce level signal, drive through power driving circuit and amplify; Go to promote opening, turn-offing of relay on the relay synthetic control circuit respectively; Interlocking through relay control again produces that air pump is opened, air pump cuts out and signalizing activity such as buzzer warning, reaches the Based Intelligent Control effect of vapour-pressure type auxiliary seal control.
The foregoing description only is explanation technical conceive of the present invention and characteristics, and its purpose is to let the personage who is familiar with this technology can understand content of the present invention and enforcement according to this, can not limit protection scope of the present invention with this.All equivalences that spirit is done according to the present invention change or modify, and all should be encompassed within protection scope of the present invention.
Claims (5)
1. electrical process machine full immersed type NC rotary table hermetically-sealed construction; It is characterized in that: said NC rotary table comprises casing (1), rotary table face (2) and drive motors (3); Wherein, casing (1) has an inner chamber, and drive motors (3) is installed in the inner chamber of casing (1); Rotary table face (2) is positioned at the outside of casing (1), drive motors (3) through one pass casing (1) driving member be connected with rotary table face (2); Said casing (1) is made up of two parts amalgamation at least; Edge joint position in amalgamation is provided with static seal structure (4); Pass casing (1) at said driving member and locate to be provided with movable sealing structure (5); Casing (1), driving member, movable sealing structure (5) and static seal structure (4) surround an annular seal space (6), on casing (1), are provided with an inflation inlet (7), and an end of this inflation inlet (7) is communicated with annular seal space (6); The other end is communicated with an air pump (8), with this relative movable sealing structure (5) and a kind of vapour-pressure type auxiliary seal of static seal structure (4) formation in annular seal space (6).
2. electrical process machine full immersed type NC rotary table hermetically-sealed construction according to claim 1; It is characterized in that: be provided with a pressure sensor (9); The probe of this pressure sensor (9) stretches in the said annular seal space (6), and pressure sensor (9) is connected with said air pump (8) through a control circuit (10).
3. electrical process machine full immersed type NC rotary table hermetically-sealed construction according to claim 1 is characterized in that: said movable sealing structure (5) is two-way rotation combination sealing oil sealing.
4. electrical process machine full immersed type NC rotary table encapsulating method; It is characterized in that: in the full immersed type NC rotary table; Drive motors (3) is installed in the inner chamber of a casing (1); Rotary table face (2) is positioned at the outside of casing (1), drive motors (3) through one pass casing (1) driving member be connected with rotary table face (2); Said casing (1) is made up of two parts amalgamation at least; Edge joint position in amalgamation adopts static seal structure (4) to seal; Pass casing (1) at said driving member and locate to adopt movable sealing structure (5) to seal, make the inner chamber of casing (1) form an annular seal space (6) with this; To said annular seal space (6) inflation inlet (7) is set on casing (1); One end of this inflation inlet (7) is communicated with annular seal space (6); The other end is communicated with an air pump (8); Be immersed in when NC rotary table under the duty of liquid; Said air pump (8) charges into gas in annular seal space (6), so that the gas pressure intensity in sealing chamber (6) greater than the pairing liquid pressure of NC rotary table lowest point in liquid, constitutes a kind of vapour-pressure type auxiliary seal by the annular seal space (6) that movable sealing structure (5) and static seal structure (4) form with this relatively.
5. electrical process machine full immersed type NC rotary table encapsulating method according to claim 4; It is characterized in that: set gas pressure intensity lower limit and gas pressure intensity limiting value according to the pairing liquid pressure value of NC rotary table lowest point in liquid, according to the bearing capacity setting gas pressure intensity higher limit of the annular seal space (6) of NC rotary table; Adopt a pressure sensor (9) to detect the gas pressure intensity in the annular seal space (6); Control circuit (10) booster air pump (8) when the gas pressure intensity in the annular seal space (6) is lower than the gas pressure intensity lower limit; Control circuit (10) is reported to the police when the gas pressure intensity in the annular seal space (6) is lower than the gas pressure intensity limiting value, and control circuit (10) cuts out air pump (8) when the gas pressure intensity in the annular seal space (6) is higher than the gas pressure intensity higher limit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100753789A CN102581408A (en) | 2012-03-21 | 2012-03-21 | Sealing structure of fully-immersed numerically controlled rotating table for electrical processing machine tool and sealing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100753789A CN102581408A (en) | 2012-03-21 | 2012-03-21 | Sealing structure of fully-immersed numerically controlled rotating table for electrical processing machine tool and sealing method thereof |
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| CN102581408A true CN102581408A (en) | 2012-07-18 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2842680A3 (en) * | 2013-08-26 | 2015-04-01 | Fanuc Corporation | Electric discharge machine having rotary table |
| EP2929971A1 (en) * | 2014-04-09 | 2015-10-14 | Fanuc Corporation | Electric discharge machine with rotary table |
| CN106956051A (en) * | 2016-01-08 | 2017-07-18 | 北京市电加工研究所 | A kind of full immersion liquid turntable of three axles |
| CN108407120A (en) * | 2018-07-10 | 2018-08-17 | 宇晶机器（长沙）有限公司 | A kind of multi-line cutting machine waves workbench gas sealing mechanism and method |
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2012
- 2012-03-21 CN CN2012100753789A patent/CN102581408A/en active Pending
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| JP2005014112A (en) * | 2003-06-23 | 2005-01-20 | Nippei Toyama Corp | Braking device of rotary table |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2842680A3 (en) * | 2013-08-26 | 2015-04-01 | Fanuc Corporation | Electric discharge machine having rotary table |
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| CN108407120B (en) * | 2018-07-10 | 2018-11-16 | 宇晶机器（长沙）有限公司 | A kind of multi-line cutting machine waves workbench gas sealing mechanism |
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Application publication date: 20120718 |