CN106141342B - The electric deposition device and its method of work that a kind of electrode machining gap adaptively adjusts - Google Patents
The electric deposition device and its method of work that a kind of electrode machining gap adaptively adjusts Download PDFInfo
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- CN106141342B CN106141342B CN201610581225.XA CN201610581225A CN106141342B CN 106141342 B CN106141342 B CN 106141342B CN 201610581225 A CN201610581225 A CN 201610581225A CN 106141342 B CN106141342 B CN 106141342B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H3/00—Electrochemical machining, i.e. removing metal by passing current between an electrode and a workpiece in the presence of an electrolyte
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Abstract
The electric deposition device and its method of work adaptively adjusted the invention discloses a kind of electrode machining gap,Electrode tip holder is fixed on above working chamber,Tool-electrode is suspended in electrode tip holder endoporus by spring,Workpiece is arranged on the workbench of tool-electrode lower end,Workbench is fed by the automatic Z axis that prolongs of upper and lower contact control,Electrolyte flows into tool-electrode endoporus and be injected on workpiece from electrode tip holder produces reaction force,Tool-electrode adaptively moves upwards,Pod apertures on tool-electrode are gradually blocked by electrode tip holder,Increase the flow of tool-electrode endoporus,So as to the flow velocity of the increased water flow in the case where processing gap is constant,And then increased water flow Percussion counter-force processes the change in gap caused by offset spring force change,Maintain the stabilization in balance processing gap,When deposit thickness reach a certain height,The lower contact for being arranged on tool-electrode top contacts with the upper contact head on electrode tip holder top,ON operation platform feeds loop,Workbench is fed downwards,Realize automation processing.
Description
Technical field
The present invention relates to the special process field in manufacturing technology, more particularly to a kind of electrode machining gap adaptively to adjust
Whole electric deposition device and its method of work.
Background technology
Electro-deposition is the chemical reaction conversion process of energy of an oxidationreduction, i.e., the metal ion in electrolyte is in the moon
The process of metallic atom is reduced into after the trapped electron of pole, electro-deposition techniques are in surface modification, material antiseptic, material reparation at present
And exploitation of new material etc. becomes very important modern processing, and serve vital effect.
The processing gap of electro-deposition has decisive role to deposition quality and deposition velocity, processes the small then deposition velocity in gap
Greatly, stable processing gap can improve processing uniformity and machined surface quality, but gap is processed in deposition process and is difficult to online
Detection and control, become the principal element for restricting electro-deposition techniques development, thus it is important to control stable processing gap to have
Meaning.The research for processing gap is related generally to process the detection in gap, the fuzzy on-line control of kinematic system and connect at present
Touch feedback control etc..
The B of Patent No. CN 102778194 Chinese invention patent discloses a kind of fine electricity based on electric double layer capacitance
The online test method in solution processing gap, the size by detecting equivalent electric double layer capacitance calculate the size in processing gap, side
Method is simple and system response time is short, but electric double layer capacitance is influenceed greatly by other factors such as flow velocitys, and accuracy of detection is not high, and does not solve
Certainly process the control problem in gap.Patent No. CN104423311 A Chinese invention patent discloses a kind of towards electric machining
Special-purpose numerical control system processes the intelligence control system and method in gap, and electricity is realized with reference to the method for fuzzy control and BP neural network
The intelligent control of gap state is processed, BP neural network changes voltage fault in real time by on-line machining efficiency data training sample
Value, makes the Self Adaptive Control of processing gap, but the stability of a system is poor, control accuracy is equally low indirectly.Patent No. CN105033374
A Chinese invention patent discloses a kind of magnetic force advanceable electrolysis electric spark combined machining method and device, using force feedback and
Magnetically-actuated regulation processing gap, on-line control can be carried out to processing gap, but have that complicated, feedback speed is slow etc. to be lacked
Fall into.
The content of the invention
In order to solve the above problems, a kind of adaptively adjusted the invention provides electrode machining gap electric deposition device and
Its method of work.
The electric deposition device that a kind of electrode machining gap adaptively adjusts, including electro-deposition system of processing, processing gap are certainly
Adapt to regulation and vertical feed system and electrolyte circulation system, the electro-deposition system of processing include tool-electrode, electrolyte,
Workpiece and adjustable pulsed power supply;The tool-electrode connects adjustable pulsed power supply positive pole, and the workpiece connects adjustable pulsed power supply
Negative pole;
The processing gap automatic adjusument and vertical feed system include tool-electrode, electrode tip holder, lower contact, upper contact head
With linear stepping motor and workbench;
The electrode tip holder is fixed on above working chamber;The electrode tip holder is cylinder;The electrode tip holder offers along axis
Blind hole, and electrode tip holder right side wall offers inlet opening, upper top surface offers hole;
The tool-electrode is inverse-T-shaped;The tool-electrode lateral wall coordinates with electrode tip holder blind hole, and tool-electrode
Lateral wall can move up and down in electrode tip holder blind hole;The tool-electrode lower end is connected by spring with electrode tip holder lower surface;
The tool-electrode is provided with through hole along axis, and side is provided with pod apertures;The tool-electrode upper surface installation
There is lower contact;The lower contact can move up and down in the upper hole that electrode tip holder opens up;The lower contact upper end and adjustable pulse electricity
Source negative pole is connected;
The workbench is arranged on linear stepping motor, described linear stepping motor one end and adjustable pulsed power supply negative pole
It is connected, the other end is connected with upper contact head;Upper contact head is arranged on electrode tip holder top;
The electrolyte circulation system includes constant flow pump, overflow valve, filter and electrode tip holder;The filter installation
In working chamber bottom, the inlet opening of the electrode tip holder is connected with overflow valve, constant flow pump and filter successively by pipeline.
Further, the pod apertures are low wide and up narrow special-shaped smooth hole.
Further, the tool-electrode only lower surface is conductive, and the upper contact head only contacts with each other with lower contact and partly led
Electricity.
Further, travel switch, the travel switch control adjustable pulsed power supply and perseverance are provided with below the workbench
Flow the break-make of pump.
Further, the tool-electrode lower surface is smooth.
A kind of method of work for the electric deposition device that electrode machining gap adaptively adjusts, comprises the following steps:
(1) by workpiece installation on the table, workbench is arranged on linear stepping motor, and electrode tip holder is fixed on into work
Above chamber, tool-electrode is suspended in electrode tip holder blind hole by spring, then hole is stretched into from electrode tip holder by lower contact, and pass through
Rivet is connected with tool-electrode, is sequentially connected filter, constant flow pump, overflow valve and electrode tip holder inlet;
(2) constant flow pump is opened, electrolyte flows out from tool-electrode through hole, and operation linear stepping motor makes under workpiece on slowly
Move, until pod apertures upper surface is slightly above electrode tip holder lower surface and reaches dynamic equilibrium, processing gap now is recoiled by current
Force adaptive is adjusted, and travel switch is arranged on into processing stop position;
(3) adjustable pulsed power supply negative pole is connected respectively with workpiece and linear stepping motor, make adjustable pulsed power supply positive pole
It is connected with tool-electrode and lower contact, connects the other end of upper contact head and linear stepping motor, electro-deposition circuit turn-on, with heavy
The progress of product processing, sedimentary uprise blocking solution, increase flow velocity, and so as to increase water impact counter-force, working electrode is upward
Motion, processing gap become big so that and flow velocity reduces, and water impact counter-force is also with reduction, but while tool-electrode rises, bullet
Spring force diminishes, so the water flow impact pressure of equilibrium position is bigger than the impulsive force of initial position, so velocity ratio now is put down
The flow velocity of weighing apparatus position is big;Simultaneously, motion also makes pod apertures be blocked to clog tool-electrode upwards so that tool-electrode lower end
Flow becomes big, makes flow increase synchronous with flow velocity, so as to maintain to process the invariable of equilibrium gap;
(4) with the progress of processing, tool-electrode is constantly moved up until upper contact head is in contact with lower contact, and straight line walks
Stepper motor, which is powered, moves, and workbench becomes big to lower feeding, processing gap, and current reaction force reduces, and tool-electrode moves downward,
Upper and lower contact terminates to contact, linear stepping motor power-off, workbench feed-disabling, and processing gap is tieed up again under pod apertures regulation
Dynamic equilibrium is held, is so moved in circles, workbench touches travel switch when requiring thickness until depositing, and travel switch makes can
Adjust the pulse power and constant flow pump power-off, process finishing.
Further, in step (2), the size of the equilibrium gap is changed by adjusting flow and the big I of pod apertures,
The processing stop position is the termination deposition position for reaching requirement processing thickness.
Further, in step (3), when tool-electrode moves upwards, when reaching equilbrium position, due to the work of initial velocity
With tool-electrode continues to move up slight distance, and because the change in gravity and processing gap is big, tool-electrode again can be toward next time
Fall, of reciprocating vibration so as to be realized in equilibrium position, its amplitude is determined by water conservancy diversion hole shape and flow.
Further, in step (4), when upper contact head, lower contact, the lower surface of the pod apertures on tool-electrode is still located
Below electrode tip holder lower surface, the continuously adjustabe of flow is ensured.
Further, in step (4), linear stepping motor is the micro mobile linear stepping motor of fast reaction, upper contact head
Displacement with linear stepping motor in lower contact single time of contact is the 1/2~3/4 of water conservancy diversion hole length.
Beneficial effect:
1. stable processing equilibrium gap can be kept, by setting up-narrow and down-wide pod apertures, to increase in electrode hole
The mode of flow offsets influence of the gravity to processing gap caused by electrode moves up, and stable processing gap can improve
The uniformity and machined surface quality of deposition process, while processing efficiency can be improved;
2. due to water impact and the adjustment effect of pod apertures, electrode makees micro- swing up and down above and below equilibrium gap, produces
Pumping effect, the uniformity of processing can be improved, reduce the hydrogen content of sedimentary, and help to reduce concentration polarization, improved and add
Work efficiency rate and machined surface quality and processing locality;
3. the device, to lower feeding, realizes Continuous maching, theory by the contact and clutch for clutch control workbench of upper and lower contact
On can realize any thickness workpiece deposition.
4. the device only needs regulation electrode pod apertures upper surface is micro- to be higher than electrode tip holder lower surface, processing gap is by current
Automatic adjusument is impacted, simple to operate and precision is high, reduces the artificially mismachining tolerance to caused by knife.
5. the apparatus structure is simple, easy to operate, and cost of equipment is cheap, but machining accuracy and efficiency high.
Brief description of the drawings
Fig. 1 is the schematic diagram for the electric deposition device that the adjustable electrode machining gap of range of deposition adaptively adjusts;
Fig. 2 is tool electrode structure schematic diagram;
Fig. 3 is tool-electrode and lower structure of contact terminal schematic cross-sectional view.
Reference is as follows:
1. adjustable pulsed power supply;2. lower contact;3. electrode tip holder;4. spring;5. tool-electrode;6. upper contact head;7. overflow valve;
8. constant flow pump;9. pod apertures;10. workpiece;11. workbench;12. linear stepping motor;13. filter;14. working chamber;15.
Electrolyte.
Embodiment
To technical scheme further description, to be done in conjunction with figure described below:
With reference to accompanying drawing 1,2 and 3, a kind of electric deposition device that electrode machining gap adaptively adjusts, including electro-deposition processing
System, processing gap automatic adjusument and vertical feed system and electrolyte circulation system, the electro-deposition system of processing include
Tool-electrode 5, electrolyte 15, workpiece 10 and adjustable pulsed power supply 1;The tool-electrode 5 connects the positive pole of adjustable pulsed power supply 1,
The workpiece 10 connects the negative pole of adjustable pulsed power supply 1;The processing gap automatic adjusument and vertical feed system include instrument
Electrode 5, electrode tip holder 3, lower contact 2, upper contact head 6 and linear stepping motor 12 and workbench 11;The side of tool-electrode 5 is set
There are pod apertures 9, the lower contact 2 is connected with the negative pole of adjustable pulsed power supply 1, and the workbench 11 is arranged on linear stepping motor 12
On, described one end of linear stepping motor 12 is connected with the negative pole of adjustable pulsed power supply 1, and the other end is connected with upper contact head 6;The electrolysis
Fluid circulation includes constant flow pump 8, overflow valve 7, filter 13 and electrode tip holder 3, and the filter 13 is arranged on working chamber
14 bottoms, the inlet opening of the electrode tip holder 3 are connected with overflow valve 7, constant flow pump 8 and filter 13 successively.
Wherein, the lower end of tool-electrode 5 is provided with through hole, and side wall is provided with pod apertures 9, and electrolyte 15 is from the through hole and leads
Flowed out in discharge orifice 9, the pod apertures 9 are low wide and up narrow special-shaped smooth hole;The workpiece 10 is arranged on workbench 11, described
Lower contact 2 is arranged on the top of tool-electrode 5, and the upper contact head 6 is arranged on the top of electrode tip holder 3;The endoporus of electrode tip holder 3 is smooth,
The tool-electrode 5 is suspended in the endoporus of electrode tip holder 3 by spring 4, and the tool-electrode 5 and the blind hole of electrode tip holder 3 coordinate and right
Water-stop is good, and the tool-electrode 5 can move freely in the blind hole of electrode tip holder 3;The electrode tip holder is fixed on above working chamber, institute
State electrode tip holder and be provided with inlet, blind hole and upper hole, the upper hole and lower contacts mates and, the lower contact energy good to water-stop
In the freely activity of upper hole;The tool-electrode only lower surface is conductive, and the upper contact head only contact portion is conductive, and the lower contact connects
Contact portion divides well conducting;The lower section of workbench 11 is provided with travel switch, controls the break-make of adjustable pulsed power supply 1 and constant flow pump 8;It is described
The lower surface of tool-electrode 5 is smooth and surface area is sufficiently large.
A kind of method of work for the electric deposition device that electrode machining gap adaptively adjusts, including following steps:
(1) workpiece 10 is arranged on workbench 11, workbench 11 is arranged on linear stepping motor 12, by electrode tip holder 3
The top of working chamber 14 is fixed on, tool-electrode 5 is suspended in the blind hole of electrode tip holder 3 by spring 4, by lower contact 2 from electrode tip holder 3
Upper hole is stretched into, and is connected by rivet with the upper end of tool-electrode 5, is sequentially connected filter 13, constant flow pump 8, the and of overflow valve 7
The inlet of electrode tip holder 3;
(2) constant flow pump 8 is opened, electrolyte 15 flows out from the endoporus of tool-electrode 5, and operation linear stepping motor 12 makes workpiece 10
Under slowly move up, until the upper surface of pod apertures 9 is slightly above the lower surface of electrode tip holder 3 and reaches dynamic equilibrium, processing gap now
By current recoil strength automatic adjusument, travel switch is arranged on processing stop position;
(3) negative pole of adjustable pulsed power supply 1 is connected respectively with workpiece 10 and linear stepping motor 12, make adjustable pulsed power supply
1 positive pole is connected with tool-electrode 5 and lower contact 2, connects the other end of upper contact head 6 and linear stepping motor 12, electro-deposition circuit
Conducting, with the progress of deposition process, sedimentary uprises blocking solution, increases flow velocity, so as to increase water impact counter-force, work
Tool electrode 5 moves upwards, and processing gap becomes big so that flow velocity reduces, and water impact counter-force is also with reduction, but tool-electrode 5
While rising, the elastic force of spring 4 diminishes, so the water flow impact pressure of equilibrium position is bigger than the impulsive force of initial position, so
The flow velocity of velocity ratio equilbrium position now is big;Simultaneously, motion also makes pod apertures 9 be blocked to clog, make tool-electrode 5 upwards
The flow of the lower end of tool-electrode 5 becomes big, make flow is synchronous with flow velocity to increase, so as to maintain processing equilibrium gap it is constant not
Become;
(4) with the progress of processing, tool-electrode 5 is constantly moved up until upper contact head 6 is in contact with lower contact 2, directly
Line stepper motor 12, which is powered, to move, and workbench 11 becomes big to lower feeding, processing gap, and current reaction force reduces, tool-electrode 5
Move downward, upper and lower contact terminates to contact, and linear stepping motor 12 powers off, the feed-disabling of workbench 11, and processing gap is in water conservancy diversion
Hole 9 maintains dynamic equilibrium again under adjusting, and so moves in circles, workbench 11 touches stroke when requiring thickness until depositing
Switch, travel switch power off adjustable pulsed power supply 1 and constant flow pump 8, process finishing.
Wherein, in step (2), the size of the equilibrium gap is changed by adjusting flow and 9 big I of pod apertures, it is described
Processing stop position is the termination deposition position for reaching requirement processing thickness;
In step (3), when tool-electrode 5 moves upwards, when reaching equilbrium position, due to the effect of initial velocity, instrument electricity
Pole 5 continues to move up slight distance, and because the change in gravity and processing gap is big, tool-electrode 5 can down fall after rise again, so that
Equilibrium position is realized of reciprocating vibration, and its amplitude is determined by the shape of pod apertures 9 and flow;
In step (4), when upper contact head 6, lower contact 2 contact, the lower surface of the pod apertures 9 on tool-electrode 5 is still in electricity
Below the lower surface of electrode seat 3, the continuously adjustabe of flow is ensured;
In step 4, linear stepping motor 12 is the micro mobile linear stepping motor of fast reaction, upper contact head 6 and lower contact 2
The displacement of linear stepping motor 12 is the 1/2~3/4 of the length of pod apertures 9 in single time of contact.
Wherein, electrolyte 15 is by CuSO45H2O(220g/L)、H2SO4 (60g/L), NaCl (80mg/L) are formed;Workpiece
10 be stainless-steel sheet, and tool-electrode 5 is using carbonization tungsten electrode, adjustable pulsed power supply 1 0~60V of voltage, 1~5000Hz of frequency,
Dutycycle 0~100%.
Operation principle:The impulsive force of current is determined by flow velocity, when flow velocity increases, water flow impact pressure increase, when flow velocity subtracts
Hour, water flow impact pressure reduces.Before deposition process starts, spring tension and both the water impact counter-forces and instrument electricity of spring 4
The gravity of pole 5 keeps balance;With the progress of deposition process, sedimentary uprises blocking solution, increases flow velocity, so as to increase current
Percussion counter-force, the disequilibrium of tool-electrode 5 are moved upwards;Tool-electrode 5 moves upwards, and processing gap becomes big so that flow velocity subtracts
Small, water impact counter-force is also with reduction, but while the rising of tool-electrode 5, the spring force of spring 4 diminishes, and gravity is permanent
It is fixed constant, so the water flow impact pressure of equilibrium position is bigger than the impulsive force of initial position, so velocity ratio balance position now
The flow velocity put is big;When flow is constant, flow velocity is bigger, and processing gap is smaller, and flow velocity is smaller, and processing gap is bigger.
The present invention exports by setting up-narrow and down-wide pod apertures 9 in the side of tool-electrode 5, by part solution from side wall
To adjust the injection flow of the lower end of tool-electrode 5;While tool-electrode 5 moves upwards, pod apertures 9, which are blocked, to be clogged so that
The flow of the lower end of tool-electrode 5 becomes big, so flow increase synchronous with flow velocity has been ensured, so as to maintain to process equilibrium gap
It is invariable.Because tool-electrode moves up, electrode laterally reveals the influence brought equivalent to reduction flow, so pod apertures design
For up-narrow and down-wide shape, the displacement of tool-electrode is bigger, then the increased flow in its lower end is also more, and then eliminates lateral leakage band
The influence come.When tool-electrode 5 moves upwards, when reaching equilbrium position, due to the effect of initial velocity, tool-electrode 5 continue to
Upper mobile slight distance, because the change in gravity and processing gap is big, tool-electrode 5 can down fall after rise again, so as in equilbrium position
Place realizes of reciprocating vibration, and its amplitude is determined by the shape of pod apertures 9 and flow.
The embodiment is preferred embodiment of the invention, but the present invention is not limited to above-mentioned embodiment, not
Away from the present invention substantive content in the case of, those skilled in the art can make it is any it is conspicuously improved, replace
Or modification belongs to protection scope of the present invention.
Claims (10)
1. the electric deposition device that a kind of electrode machining gap adaptively adjusts, including electro-deposition system of processing, processing gap are adaptive
It should adjust and vertical feed system and electrolyte circulation system, it is characterised in that:The electro-deposition system of processing includes instrument electricity
Pole (5), workpiece (10) and adjustable pulsed power supply (1);The tool-electrode (5) connects adjustable pulsed power supply (1) positive pole, the work
Part (10) connects adjustable pulsed power supply (1) negative pole;
It is described processing gap automatic adjusument and vertical feed system include tool-electrode (5), electrode tip holder (3), lower contact (2),
Upper contact head (6), linear stepping motor (12) and workbench (11);The electrode tip holder (3) is fixed on above working chamber (14);It is described
Electrode tip holder (3) is cylinder;The electrode tip holder (3) offers blind hole along axis, and electrode tip holder (3) right side wall offers feed liquor
Hole, upper top surface offer hole;The tool-electrode (5) is inverse-T-shaped;Tool-electrode (5) lateral wall and electrode tip holder (3)
Blind hole coordinates, and the lateral wall of tool-electrode (5) can move up and down in electrode tip holder (3) blind hole;Tool-electrode (5) lower end leads to
Spring (4) is crossed with electrode tip holder (3) lower surface to be connected;The tool-electrode (5) is provided with through hole along axis, and side is provided with and led
Discharge orifice (9);Tool-electrode (5) upper surface is provided with lower contact (2);What the lower contact (2) can open up in electrode tip holder (3)
Moved up and down in upper hole;Lower contact (2) upper end is connected with adjustable pulsed power supply (1) negative pole;Workbench (11) installation
On linear stepping motor (12), described linear stepping motor (12) one end is connected with adjustable pulsed power supply (1) negative pole, the other end
It is connected with upper contact head (6);Upper contact head (6) is arranged on electrode tip holder (3) on top surface;
The electrolyte circulation system includes constant flow pump (8), overflow valve (7), filter (13) and electrolyte (15);The mistake
Filter device (13) is arranged on working chamber (14) bottom, and the working chamber (14) is built with electrolyte (15);The electrode tip holder (3)
Inlet opening is connected with overflow valve (7), constant flow pump (8) and filter (13) successively by pipeline.
2. the electric deposition device that electrode machining gap according to claim 1 adaptively adjusts, it is characterised in that described to lead
Discharge orifice (9) is low wide and up narrow special-shaped smooth hole.
3. the electric deposition device that a kind of electrode machining gap according to claim 1 adaptively adjusts, it is characterised in that institute
Tool-electrode (5) only lower surface conduction is stated, the upper contact head (6) only contacts with each other partially electronically conductive with lower contact (2).
4. the electric deposition device that electrode machining gap according to claim 1 adaptively adjusts, it is characterised in that the work
Make to be provided with travel switch below platform (11), the break-make of the travel switch control adjustable pulsed power supply (1) and constant flow pump (8).
5. the electric deposition device that electrode machining gap according to claim 1 adaptively adjusts, it is characterised in that the work
It is smooth to have electrode (5) lower surface.
6. the work side for the electric deposition device that the electrode machining gap according to any one of claim 1 to 5 adaptively adjusts
Method, it is characterised in that comprise the following steps:
(1) workpiece (10) is arranged on workbench (11), workbench (11) is arranged on linear stepping motor (12), by electrode
Seat (3) is fixed on above working chamber (14), and tool-electrode (5) is suspended in electrode tip holder (3) blind hole by spring (4), is touched lower
Head (2) stretches into from the upper hole of electrode tip holder (3), and is connected by rivet with the upper end of tool-electrode (5), is sequentially connected filter
(13), constant flow pump (8), overflow valve (7) and electrode tip holder (3) inlet;
(2) constant flow pump (8) is opened, electrolyte (15) flows out from tool-electrode (5) through hole, and operation linear stepping motor (12) makes work
Part slowly moves up under (10), until pod apertures (9) upper surface is slightly above electrode tip holder (3) lower surface and reaches dynamic equilibrium, now
Processing gap by current recoil strength automatic adjusument, travel switch is arranged on processing stop position;
(3) adjustable pulsed power supply (1) negative pole is connected respectively with workpiece (10) and linear stepping motor (12), make adjustable pulse electric
Source (1) positive pole is connected with tool-electrode (5) and lower contact (2), connection upper contact head (6) and linear stepping motor (12) it is another
End, electro-deposition circuit turn-on, with the progress of deposition process, sedimentary uprises blocking solution, increases flow velocity, so as to increase water
Percussion counter-force is flowed, tool-electrode (5) moves upwards, and processing gap becomes big so that flow velocity reduces, and water impact counter-force is also with subtracting
It is small, but while tool-electrode (5) rising, the elastic force of spring (4) diminishes, so the water flow impact pressure of equilibrium position is than initial
The impulsive force of position is big, so the flow velocity of velocity ratio equilbrium position now is big;Simultaneously, tool-electrode (5) moves upwards
Also making pod apertures (9) be blocked to clog so that the flow of tool-electrode (5) lower end becomes big, makes flow increase synchronous with flow velocity, so as to
Maintain the invariable of processing equilibrium gap;
(4) with the progress of processing, tool-electrode (5) is constantly moved up until upper contact head (6) is in contact with lower contact (2),
Linear stepping motor (12), which is powered, to move, and workbench (11) becomes big to lower feeding, processing gap, and current reaction force reduces, work
Tool electrode (5) moves downward, and upper contact head (6), lower contact (2) terminate contact, linear stepping motor (12) power-off, workbench (11)
Feed-disabling, processing gap maintain dynamic equilibrium under pod apertures (9) regulation, so moved in circles again, will until depositing
Workbench (11) touches travel switch when seeking thickness, and travel switch powers off adjustable pulsed power supply (1) and constant flow pump (8), added
Work terminates.
7. the method for work for the electric deposition device that electrode machining gap according to claim 6 adaptively adjusts, its feature
It is:In step (2), change the size of the equilibrium gap by adjusting flow and the big I of pod apertures (9), the processing stops
Stop bit is set to the termination deposition position for reaching requirement processing thickness.
8. the method for work for the electric deposition device that electrode machining gap according to claim 6 adaptively adjusts, its feature
It is:In step (3), when tool-electrode (5) motion upwards, when reaching equilbrium position, due to the effect of initial velocity, tool-electrode
(5) slight distance is continued to move up, because the change in gravity and processing gap is big, tool-electrode (5) can down fall after rise again, so as to
Realized in equilibrium position of reciprocating vibration, its amplitude is determined by pod apertures (9) shape and flow.
9. the method for work for the electric deposition device that electrode machining gap according to claim 6 adaptively adjusts, its feature
It is:In step (4), when upper contact head (6), lower contact (2) contact, the lower surface of the pod apertures (9) on tool-electrode (5) is still located
Below electrode tip holder (3) lower surface, the continuously adjustabe of flow is ensured.
10. the method for work for the electric deposition device that electrode machining gap according to claim 6 adaptively adjusts, its feature
It is:In step (4), linear stepping motor (12) is the micro mobile linear stepping motor of fast reaction, and upper contact head (6) touches with lower
The displacement of linear stepping motor (12) is the 1/2~3/4 of pod apertures (9) length in head (2) single time of contact.
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CN112427755A (en) * | 2020-11-12 | 2021-03-02 | 北京理工大学 | Low-rigidity part complex surface high-precision polishing device |
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