CN110067013A - A kind of more cathodes, which are staggered the time, is connected differential arc oxidation control method - Google Patents
A kind of more cathodes, which are staggered the time, is connected differential arc oxidation control method Download PDFInfo
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- CN110067013A CN110067013A CN201910351646.7A CN201910351646A CN110067013A CN 110067013 A CN110067013 A CN 110067013A CN 201910351646 A CN201910351646 A CN 201910351646A CN 110067013 A CN110067013 A CN 110067013A
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/024—Anodisation under pulsed or modulated current or potential
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/026—Anodisation with spark discharge
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Abstract
A kind of more cathodes, which are staggered the time, is connected differential arc oxidation control method, this method is the single cathode that will simultaneously participate in reaction, resolve into it is several can independent control cathode, it realizes that the cathode of different physical locations is connected in different time by the Continuity signal that mao power source controller generates, completes the micro-arc oxidation treatment of workpiece surface product in conducting region；The current density under differential arc oxidation process unit area can be reduced, it can be staggered the time by several cathodes in different physical locations and put into electric field, different parts reaction condition in adjustment microarc oxidation solution rapidly, the Rapid reset for realizing the reaction conditions such as temperature, concentration, accumulation reaches and increases single process processing area, reduces current over pulse and improve the beneficial effect of ceramic layer growth characteristics.
Description
Technical field
The invention belongs to differential arc oxidation control technology fields, and in particular to a kind of more cathodes, which are staggered the time, is connected differential arc oxidation control
Method.
Background technique
Differential arc oxidation or plasma surface ceramic technology are a kind of novel plasma processing technologies.Differential arc oxidation is
Using aluminium, magnesium, titanium and its alloy as anode, the materials such as stainless steel or graphite are as cathode, in suitable electrolyte, anode
Applying electric field between cathode makes metal surface that the exoelectrical reaction of micro arc plasma body occur, and utilizes plasma discharge instantaneous high-temperature
The quenching of melting and electrolyte acts on, and can go out the ceramic layer based on metal oxide, the ceramics in anode surface growth in situ
Layer has the excellent performances such as anti-corrosion, wear-resisting, heat-resisting and insulation, can significantly improve protecting metallic surface performance.
Existing patent and document for inhibiting current over pulse, promoting the processing area of unitary current to reduce energy consumption,
It realizes to the differential arc oxidation processing method of the light metal workpieces of large area, is concentrated mainly on by adjusting electrolyte prescription or passes through
Increasing mechanical equipment makes anode or cathode carry out mechanicalness movement, to change the process of metal works micro-arc oxidation treatment.Pass through
To select additive appropriate, document " low energy consumption magnesium alloy differential arc oxidation electrolyte design and Additive Mechanism Study " is mentioned
A kind of method that differential arc oxidation arcing voltage is judged based on anodic polarization curves is gone out, to instruct selection that there is low arcing voltage
Film forming accelerating, this method is very limited come the effect for reducing energy consumption by reducing solution resistance, is only capable of reducing the starting the arc of part
Energy consumption；And additive will lead to ceramic layer slow growth.Application No. is (CN201010187768.6, publication number:
CN101845655, publication date: 2010.09.29), a kind of entitled low power consuming anode be fade-in formula differential arc oxidation treatment method and dress
The patent application set proposes a kind of low power consuming anode and is fade-in formula differential arc oxidation treatment method, is consumed by detecting anode workpiece
Size of current adjusts the speed that workpiece immerses electrolyte, realizes the oxidation of metal surface quick differential arc, this kind of mode solves progress
Current over pulse, the problems such as switching device stress is big when large area workpiece differential arc oxidation is processed.This method needs to increase additional machinery
Equipment, and this method has mainly solved the problems, such as that the energy consumption of forearc is excessive, and the energy consumption after the starting the arc is had no
Method reduces.Application No. is (CN201020592721.3, publication number: CN201809466U, publication date: 2011.04.27) is entitled
A kind of device utility model patent of electrode scanning-type differential arc oxidation, proposes a kind of electrode scanning-type micro arc oxidization device,
Devices, the motors such as the fixed guide rail of processing groove installation suitable for reading, idler wheel, motor and belt make sleeve cathode along workpiece table by belt
Face Uniform Movement completes the processing of large-area metal surface by micro-arc oxidation.The device is improved greatly by introducing movable machinery equipment
The problem of Area processing, but it is difficult to ensure the continuity and consistency of ceramic layer preparation, especially for complex three-dimensional curved face part
The processing of position is more difficult to be applicable in.
Summary of the invention
To overcome above-mentioned the deficiencies in the prior art, it staggers the time the object of the present invention is to provide a kind of more cathodes and differential arc oxidation is connected
Control method, by by the single cathode in micro-arc oxidation process, resolve into it is several can independent control cathode, in conjunction with controlling party
Method improves the single maximum differential arc oxidation working process ability under equal-wattage, is beneficial to the promotion of ceramic layer quality.
To achieve the above object, the technical scheme adopted by the invention is that, a kind of more cathodes, which are staggered the time, is connected differential arc oxidation control
Method processed, comprising the following steps:
It step 1, will in the pulse link of mao power source by traditional single cathodic decomposition at several independent cathodes
After cathode is connect with switching device respectively, formed it is several can independent control cathode；
Step 2, controllable independent cathode step 1 obtained is rationally evenly distributed in the week of anodes in electrolytic cells workpiece
It encloses, mao power source output cathode is connected with anode workpiece, and output negative pole is connected with several controllable cathodes；
Step 3, realize the cathode of different physical locations not by the Continuity signal that mao power source controller generates
With being connected in the time, is formed to be exported by the controllable cathode-power supply of power supply output cathode-anode workpiece-microarc oxidation solution-and be born
The conducting circuit of pole composition, completes the micro-arc oxidation treatment of workpiece surface in conducting region.
The beneficial effects of the present invention are: this method can reduce the current density under differential arc oxidation process unit area, and
And can be staggered the time by several cathodes in different physical locations and put into electric field, different parts in microarc oxidation solution are adjusted rapidly
Reaction condition, realizes the Rapid reset of the reaction conditions such as temperature, concentration, accumulation, increases single process processing to reach
Area reduces current over pulse and improves the beneficial effect of ceramic layer growth characteristics.The present invention is real without increasing external mechanical equipment
Now expand the area of workpiece surface micro-arc oxidation treatment under rated current；By by traditional single cathodic decomposition at it is several can
Cathode is rationally evenly distributed in electrolytic cell by the cathode of control, realizes the quick place of metal works large area, different dimensions
Reason, not only reduces current density, expands production capacity, and the continuity of ceramic layer and uniformity are guaranteed；Simultaneously as
By control, the cathode investment electric field of different location is participated in reacting in different time, and the corresponding region of cathode not put into
Electric field, which is realized, quickly to be restored, temperature field, electrolyte concentration, part the reaction conditions such as plasma density obtain it is quickly multiple
Position is conducive to the region next time and carries out exoelectrical reaction, so as to improve the growth characteristics of ceramic layer, obtains more evenly, more cause
Close ceramic layer.It changes due to staggering the time conducting control cathode in microarc oxidation solution investment electric field, leads to temperature field, electrolysis
The change in reaction conditions such as matter concentration, local plasma density, to improve the performance of ceramic layer.
Detailed description of the invention
Fig. 1 is the schematic device that the present invention uses.
Fig. 2 is unipolarity mao power source switch control signal schematic diagram in the embodiment of the present invention.
Fig. 3 is Anodic workpiece of the present invention both ends equivalent voltage waveform diagram.
In figure: 1- mao power source；2- DC source；3- pulse link；4- power supply exports DC+；5- power supply exports DC-；
6- electrolytic cell；7- electrolyte；8- anode workpiece to be processed；9- cathode one；10- cathode two；11- cathode three；12- cathode four；13-
Cathode five；14- cathode six；15- cathode seven；16- cathode eight；17- switch one；18- switch two；19- switch three；20- switch four；
21- switch five；22- switch six；23- switch seven；24- switch eight.
Specific embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings.
A kind of more cathodes of the present invention, which are staggered the time, is connected differential arc oxidation control method, and institute's use device is as shown in Figure 1, the device packet
It includes mao power source part and electrolytic bath part is grouped as.
The mao power source 1 includes DC source 2 and pulse link 3；The DC source 2 be substantially carried out output voltage,
The adjusting of electric current and power, output end are output cathode DC+4 and output negative pole DC-5；The pulse link 3 is defeated by DC source 2
Out direct current be chopped into pulse electricity, arc oxidation 1 output cathode of power supply directly connect with DC+4,17- switch one, 18- switch two,
19- switch three, 20- switch four, 21- switch five, 22- switch six, 23- switch seven, 24- switch eight and output negative pole DC-5 are simultaneously
Connection.
The electrolytic bath part point includes electrolytic cell 6, electrolyte 7, anode workpiece 8 to be processed, cathode 1；Cathode 2 10；Yin
Pole 3 11；Cathode 4 12；Cathode 5 13；Cathode 6 14；Cathode 7 15；Cathode 8 16.
A kind of more cathodes, which are staggered the time, is connected differential arc oxidation control method, comprising the following steps:
Step 1, by traditional single cathodic decomposition at several independent cathodes, in the pulse link of mao power source 1
After cathode is connect with switching device respectively, formed it is several can independent control cathode；
Step 2, controllable independent cathode step 1 obtained is rationally evenly distributed in anode to be processed in electrolytic cell 6
Around workpiece 8, mao power source output cathode is connected with anode workpiece, and output negative pole is connected with several controllable cathodes；
Step 3, realize the cathode of different physical locations not by the Continuity signal that mao power source controller generates
With being connected in the time, is formed to be exported by the controllable cathode-power supply of power supply output cathode-anode workpiece-microarc oxidation solution-and be born
The conducting circuit of pole composition, completes the micro-arc oxidation treatment of workpiece surface in conducting region.
Embodiment
The more cathodes of unipolarity mao power source, which are staggered the time, is connected differential arc oxidation control method
Step 1, the preparation stage:
Firstly, being polished anode workpiece 8 to be processed, being polished, the surface treatment such as degreasing, then by anode work to be processed
Part 8 is placed in electrolytic cell 6；Secondly, adjustment cathode 1；Cathode 2 10；Cathode 3 11；Cathode 4 12；Cathode 5 13；Cathode six
14；Cathode 7 15；Position of the cathode 8 16 relative to anode workpiece 8 to be processed, makes each cathode reasonably and uniformly be distributed in work
Around part；Anode workpiece 8 to be processed is connected by third with DC+4；Switch 1, switch 2 18, switch 3 19, switch 4 20,
Switch 5 21, switch 6 22, switch 7 23, switch 8 24 distinguish cathode 1, cathode 2 10, cathode 3 11, cathode 4 12, yin
Pole 5 13, cathode 6 14, cathode 7 15, cathode 8 16 and it is connected；Finally, pouring into electrolyte 7 in electrolytic cell 6, make to be processed
Anode workpiece 8 is completely immersed in electrolyte 7；
Step 2, workpiece surface processing stage:
After the completion of device connection, start mao power source；8 surface of anode workpiece pottery to be processed is detected by detection device
The growing state of enamel coating adjusts the size of output voltage, electric current and power；Mao power source controller issues signal control and opens
Close whether one 17, switch 2 18, switch 3 19, switch 4 20, switch 5 21, switch 6 22, switch 7 23, switch 8 24 turn off
And conducting duration；
Signal schematic representation is controlled as shown in Fig. 2, abscissa t indicates the differential arc oxidation time in figure, ordinate S1 indicates switch
One 17 switching signal, S2 indicate that the switching signal of switch 2 18, S3 indicate the switching signal of switch 3 19, S4 expression switch four
20 switching signal, S5 indicate that the switching signal of switch 5 21, S6 indicate the switching signal of switch 6 22, S7 expression switch 7 23
Switching signal, S8 indicate the switching signal of switch 8 24, switch 1 is connected at the t0-t1 moment in DC-, and the t2-t3 moment is connected
Switch 3 19 is connected in switch 2 18, t4-t5 moment, and switch 4 20 is connected in the t6-t7 moment, and switch 5 21 is connected in the t8-t9 moment,
Switch 6 22 is connected in the t10-t11 moment, and switch 7 23 is connected in the t12-t13 moment, and switch 8 24 is connected in the t14-t15 moment, switch
Corresponding cathode realizes conducting respectively.
Anode workpiece both end voltage equivalent voltage waveform as shown in figure 3, in figure abscissa t indicate the differential arc oxidation time, indulge
Coordinate V indicates anode workpiece both end voltage.Since more cathodes are staggered the time conducting, anode workpiece both end voltage is equivalent to pulse voltage,
The completion more cathodes of unipolar pulse circuit, which are staggered the time, is connected micro-arc oxidation treatment.
Step 3, post-processing stages:
After the completion of differential of arc on metal surface oxidation, mao power source 1 stops working, and takes out anode workpiece 8, enters later
The post-processing work such as cleaning, detection.
The present embodiment, which staggers the time to a kind of more cathodes, to be connected differential arc oxidation control method and is illustrated, can in practical operation
According to features such as surface of workpiece product size, shapes, the adjustment of cathode quantity, location and shape is carried out, meanwhile, it can be according to sun
The growing state of pole workpiece surface ceramic layer carries out the effect of output voltage, electric current and power regulation and switching signal to DC source
Sequentially, the effect factors such as duration and interval time carry out appropriate adjustment.
The above content is specific embodiment is combined, further detailed description of the invention, and it cannot be said that this hair
Bright specific implementation is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs, it is not taking off
Under the premise of from present inventive concept, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to the present invention by being mentioned
The scope of patent protection that claims of friendship determine.
Claims (2)
1. a kind of more cathodes, which are staggered the time, is connected differential arc oxidation control method, which comprises the following steps:
Step 1, by traditional single cathodic decomposition at several independent cathodes, by cathode in the pulse link of mao power source
After being connect respectively with switching device, formed it is several can independent control cathode；
Step 2, controllable independent cathode step 1 obtained is rationally evenly distributed in around anodes in electrolytic cells workpiece,
Mao power source output cathode is connected with anode workpiece, and output negative pole is connected with several controllable cathodes；
Step 3, realize the cathode of different physical locations when different by the Continuity signal that mao power source controller generates
Interior conducting is formed by the controllable cathode-power supply output negative pole group of power supply output cathode-anode workpiece-microarc oxidation solution-
At conducting circuit, complete conducting region in workpiece surface micro-arc oxidation treatment.
2. the more cathodes of unipolarity mao power source, which are staggered the time, is connected differential arc oxidation control method, which is characterized in that including following step
It is rapid:
Step 1, the preparation stage:
Firstly, being polished anode workpiece 8 to be processed, being polished, the surface treatment such as degreasing, then by anode workpiece 8 to be processed
It is placed in electrolytic cell 6；Secondly, adjustment cathode 1, cathode 2 10, cathode 3 11, cathode 4 12, cathode 5 13, cathode 6 14,
The position of cathode 7 15, cathode 9 16 relative to anode workpiece 8 to be processed makes each cathode reasonably and uniformly be distributed in workpiece week
It encloses；Anode workpiece 8 to be processed is connected by third with DC+4；Switch 1, switch 2 18, switch 3 19, switch 4 20, switch
5 21, switch 6 22, switch 7 23, switch 8 24 distinguish cathode 1, cathode 2 10, cathode 3 11, cathode 4 12, cathode five
13, cathode 6 14, cathode 7 15, cathode 8 16 and it is connected；Finally, pouring into electrolyte 7 in electrolytic cell 6, make anode to be processed
Workpiece 8 is completely immersed in electrolyte 7；
Step 2, workpiece surface processing stage:
After the completion of device connection, start mao power source；8 ceramic layer on surface of anode workpiece to be processed is detected by detection device
Growing state, adjust output voltage, electric current and power size；Mao power source controller issues Signal-controlled switch one
17, whether switch 2 18, switch 3 19, switch 4 20, switch 5 21, switch 6 22, switch 7 23, switch 8 24 turn off and lead
Logical duration；
Step 3, post-processing stages:
After differential of arc on metal surface oxidation after the completion of, mao power source 1 stops working, take out anode workpiece 8 to be processed, it is laggard
Enter the post-processing work such as cleaning, detection.
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