CN101112727A - Direct-current arc electric spark processing method - Google Patents
Direct-current arc electric spark processing method Download PDFInfo
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- CN101112727A CN101112727A CNA2007101207038A CN200710120703A CN101112727A CN 101112727 A CN101112727 A CN 101112727A CN A2007101207038 A CNA2007101207038 A CN A2007101207038A CN 200710120703 A CN200710120703 A CN 200710120703A CN 101112727 A CN101112727 A CN 101112727A
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Abstract
A DC electric arc electric spark processing method relates to the high-speed electric spark processing in the special type processing field by adopting the DC power supply. When processed, the tool electrode and the work piece are respectively connected with two poles of the DC power supply and produce relative motion in a plane parallel to the processed surface; the tool electrode is driven to get close to the work piece by a feeding mechanism drive tool, till the occurring of the discharging phenomena; the tool electrode and the processed work piece keep the relative motion and the feeding motion parallel to the processed surface, causing the work piece material continuously corroded; the corroded material leaves the discharging area under the drive of the processing liquid continuously supplied. According to the method provided by the invention, the corrosion process of the work piece material is continuously carried out in time, thus being beneficial for improving the processing efficiency of the electric spark; meanwhile, the electric current of the spark discharging is also stable, which is beneficial for reducing the electromagnetic interference produced in the processing of the electric spark.
Description
Technical field
The invention belongs to the special process field in the machining, be specifically related to use DC power supply to carry out the high-speed electric spark method for processing.
Background technology
The power supply that the tradition spark machined is used is the pulsed discharge power supply, and each pulsed discharge cycle all will form through discharge channel, the dishing out and four root phases of deionization of contrasted between solid dielectric of the liquefaction of electrode material and vaporization, electrode material.Wherein some stage is not carried out ablation to workpiece material, but requisite.Such as the contrasted between solid dielectric deionization stage, this stage is in the gap of discharge pulse, and main effect is to allow working media recover state of insulation, and the mobile cooling by working solution and take away the processing bits.If there is not this stage, in other words time of continuing in this stage too short, just may be, and then cause the burn phenomenon of workpiece because the working media deionization is insufficient or near the accumulation and cause a stable arc discharge preceding point of discharge of processing bits.In traditional spark machined, continuous before and after four root phases, in time can not be overlapping.Like this, traditional spark machined just shows as the discontinuity discharge corrosion process of pointwise on macroscopic view, compare the processing mode that belongs to poor efficiency with the machine cut processing mode.Under the dual-pressure of intense market competition and changeable user's request, must fundamentally improve the efficient of spark machined, just can win user's approval, thereby win necessary development space for spark erosion technique.
In addition, discharge voltage and discharge current all are pulse features during the tradition spark machined, understanding towards periphery in the processing, environment sends strong electromagnetic interference signal, the operate as normal of instrument and equipment around this has not only influenced, and the discharge condition of electric discharge machining apparatus itself detected to constitute disturb, influenced the stability of process.In today that environmental problem becomes increasingly conspicuous, reducing or eliminating the various pollutions that occur the manufacture process from the source also is the important topic that spark erosion technique faced.
In a word, traditional electrical spark working (machining) efficiency is low, and the serious basic reason of electromagnetic pollution just is that it is a kind of pulse feature processing mode.People wish that the pulse spacing of spark machined can be as far as possible little, even can narrow down to negligible degree or even zero to this interval, thereby improve working (machining) efficiency.But, because the restriction of processing stability and surface quality, thisly reduce the effort that the pulse spacing improves process velocity simply and fail to obtain desirable effect so far.
Summary of the invention
At ubiquitous inefficiency and electromagnetic interference problem in traditional spark machined, correlative study achievement in conjunction with motion electric arc, the present invention proposes a kind of high-speed electric spark processing method of using DC power supply, can greatly improve the speed of spark machined under the prerequisite that guarantees crudy.
The present invention is by the following technical solutions:
1) tool-electrode and workpiece are connected to the two poles of the earth of dc source respectively;
2) relative motion takes place in tool-electrode and workpiece in being parallel to the face of surface to be machined, and approaching by feed mechanism driven tool electrode and workpiece, to there being electric discharge phenomena to produce;
3) keep relative motion and the feed motion that is parallel to surface to be machined between tool-electrode and workpiece to be machined, make the workpiece material energy by continuous ablation;
4) supply with working media continuously, so that in time take away the processing bits between tool-electrode and the workpiece.
Tool-electrode used in the present invention is a coreless armature, by making coreless armature rotation implementation tool electrode and the relative motion of workpiece in being parallel to the plane of surface to be machined.
The present invention compared with prior art owing to have the high speed relative motion between tool-electrode and the workpiece, so during the use DC power supply, electric arc can not stay on the same point of discharge, but according to certain rules generation high-speed motion.From the space, electric discharge phenomena evenly take place between the approaching mutually surface of tool-electrode and workpiece; From the time, electric arc is constant to the ablation effect of workpiece.Here it is, and edm process has become a material ablation process continuous in time, thereby has greatly improved process velocity.In addition, discharge voltage and electric current during owing to normal process are more stable, have therefore not only saved pulse generating circuit, have saved cost, and the electromagnetic interference of surrounding environment generation is also greatly reduced, thereby have improved the Electro Magnetic Compatibility of spark machined.
Description of drawings
The embodiment frame for movement schematic diagram of Fig. 1 hollow tool-electrode rotation realization DC electric arc electric spark machined for the present invention adopts.
Fig. 2 is that the circuit part of direct-current arc electric spark processing method is formed schematic diagram.
Among the figure, 1-main shaft anchor clamps; 2-working media passage; The 3-workpiece; The hollow tool-electrode of 4-; The 5-workbench; The 6-dc source; The 7-switch; The 8-current-limiting resistance.
The specific embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described further.
The embodiment frame for movement schematic diagram of Fig. 1 hollow tool-electrode rotation realization DC electric arc electric spark machined for the present invention adopts.It comprises the main shaft anchor clamps 1 that can rotate, and is clipped in the hollow tool-electrode 4 on the main shaft anchor clamps, workbench 5 and the workpiece 3 that is installed on the workbench, and the centre bore of its hollow core tool-electrode 4 is as the part of working media passage 2.The circuit part of this method as shown in Figure 2, hollow tool-electrode 4 is received the utmost point of dc source 6 by current-limiting resistance 8 and switch 7, workpiece 3 has then directly been received another utmost point of dc source 6.Should be noted that and take place between workpiece and the tool-electrode and to keep the numerical value of the required discharging gap of electric discharge phenomena and dc source voltage relevant that the voltage that dc source provided is low more, discharging gap is just more little, and it is also difficult more to produce and keep spark discharge; On the contrary, supply voltage is high more, and discharging gap is just big more, and it is just easy more to produce and keep spark discharge.Consider above-mentioned factor, can adopt tens volts and more high-tension DC power supply, discharge process is just than being easier to control like this.
Add man-hour, connect switch 7, and make main shaft anchor clamps 1 drive hollow tool-electrode 4 rotations, the rotary speed of tool-electrode, the linear velocity of tool-electrode in being parallel to the face of surface to be machined is the key factor that influences process more precisely, and under the certain situation of other condition, the linear velocity of tool-electrode in being parallel to the face of surface to be machined is high more, just help the continuous variation of spark location more, this is to preventing that the burn because of causing in the discharge of same point continuous several times from being favourable.Therefore, the moving-wire speed of tool-electrode in being parallel to the face of surface to be machined is reached more than the 1m/s.Main shaft anchor clamps 1 drive hollow tool-electrode 4 and do the servo feed motion towards workpiece 3 in rotation, until there being electric discharge phenomena to produce.Can see this moment, uniform spark discharge can be on immediate annular surface between hollow tool-electrode 4 and the workpiece 3 takes place, this is actually because the persistence of vision effect of eye, can not tell electric arc spatially high-speed motion caused.Liquefaction even gasification can constantly take place in the material on workpiece 3 surfaces in this moment region of discharge under the high temperature action of electric arc, break away from workpiece 3 surfaces under the drive of the working media of supplying with continuously and become to process and consider to be worth doing in the explosive force of spark discharge and working media passage 2.Along with the removal of workpiece 3 skin-materials, hollow tool-electrode 4 is kept relative motion and the feed motion that is parallel to surface to be machined under the drive of main shaft anchor clamps 1, makes the workpiece material energy by continuous ablation.
Because high-speed motion spatially takes place in electric arc, single certain with regard on the arc motion path a bit, electric arc is pulse feature, and the burn phenomenon of this point can not take place.Like this, spark machined just can directly be used DC power supply, and must there be any to be on arbitrary moment workpiece 3 by in the ablation process, spark machined just can be carried out continuously and needn't be interrupted by the pulse spacing in the tradition processing, this can greatly improve the speed of spark machined undoubtedly, thereby realizes processing more efficiently.In addition, because electric arc continues to exist in time, discharge current is continuous, and the electromagnetic interference that discharge process produced also can reduce greatly like this.
At different processing requests, the tool-electrode among the present invention also can adopt other shapes such as thread or colyliform, and the relative motion of workpiece and tool-electrode also can be realized by translation or translation and rotation except that rotation jointly.
Claims (2)
1. direct-current arc electric spark processing method is characterized in that this method carries out as follows:
1) tool-electrode and workpiece are connected to the two poles of the earth of dc source respectively;
2) relative motion takes place in tool-electrode and workpiece in being parallel to the face of surface to be machined, and approaching by feed mechanism driven tool electrode and workpiece, to there being electric discharge phenomena to produce;
3) keep relative motion and the feed motion that is parallel to surface to be machined between tool-electrode and workpiece to be machined, make the workpiece material energy by continuous ablation;
4) supply with working media continuously, so that in time take away the processing bits between tool-electrode and the workpiece.
2. in accordance with the method for claim 1, it is characterized in that: tool-electrode adopts coreless armature, by making coreless armature rotation implementation tool electrode and the relative motion of workpiece in being parallel to the face of surface to be machined.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007101207038A CN100537100C (en) | 2007-08-24 | 2007-08-24 | Direct-current arc electric spark processing method |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007101207038A CN100537100C (en) | 2007-08-24 | 2007-08-24 | Direct-current arc electric spark processing method |
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| CN101112727A true CN101112727A (en) | 2008-01-30 |
| CN100537100C CN100537100C (en) | 2009-09-09 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103692033A (en) * | 2013-12-10 | 2014-04-02 | 无锡微研有限公司 | Device and method for magnetic control electric spark processing of back taper hole |
| CN103706904A (en) * | 2013-12-10 | 2014-04-09 | 无锡微研有限公司 | Device capable of processing magnetic control electric spark on internal surface of through hole and method thereof |
| CN103801771A (en) * | 2012-11-12 | 2014-05-21 | 李磊 | High-speed cutting electro-discharge machining method |
| CN104588797A (en) * | 2014-12-01 | 2015-05-06 | 北京理工大学 | Forming electrode used for electrical discharge machining |
| CN104789918A (en) * | 2015-04-01 | 2015-07-22 | 贾鹏 | Hardening treatment method for surface of steel element |
| CN107363350A (en) * | 2017-09-12 | 2017-11-21 | 天津科技大学 | Contactless EDM System |
| CN107931757A (en) * | 2017-12-01 | 2018-04-20 | 清华大学 | Electric discharge machining apparatus and electric spark machine tool based on movement electric arc |
-
2007
- 2007-08-24 CN CNB2007101207038A patent/CN100537100C/en active Active
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103801771A (en) * | 2012-11-12 | 2014-05-21 | 李磊 | High-speed cutting electro-discharge machining method |
| CN103801771B (en) * | 2012-11-12 | 2017-05-03 | 李磊 | High-speed cutting electro-discharge machining method |
| CN103692033A (en) * | 2013-12-10 | 2014-04-02 | 无锡微研有限公司 | Device and method for magnetic control electric spark processing of back taper hole |
| CN103706904A (en) * | 2013-12-10 | 2014-04-09 | 无锡微研有限公司 | Device capable of processing magnetic control electric spark on internal surface of through hole and method thereof |
| CN103692033B (en) * | 2013-12-10 | 2016-01-13 | 无锡微研有限公司 | Reverse taper holes magnetic control electric discharge machining apparatus and method |
| CN103706904B (en) * | 2013-12-10 | 2016-04-20 | 无锡微研有限公司 | Through-hole inner surface magnetic control electric discharge machining apparatus and method |
| CN104588797A (en) * | 2014-12-01 | 2015-05-06 | 北京理工大学 | Forming electrode used for electrical discharge machining |
| CN104789918A (en) * | 2015-04-01 | 2015-07-22 | 贾鹏 | Hardening treatment method for surface of steel element |
| CN107363350A (en) * | 2017-09-12 | 2017-11-21 | 天津科技大学 | Contactless EDM System |
| CN107363350B (en) * | 2017-09-12 | 2023-07-18 | 天津科技大学 | Non-contact electric spark machining system |
| CN107931757A (en) * | 2017-12-01 | 2018-04-20 | 清华大学 | Electric discharge machining apparatus and electric spark machine tool based on movement electric arc |
| CN107931757B (en) * | 2017-12-01 | 2019-07-26 | 清华大学 | Electric discharge machining apparatus and electric spark machine tool based on movement electric arc |
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| Publication number | Publication date |
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| CN100537100C (en) | 2009-09-09 |
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