CN108080756A - A kind of cutting method of conductor material - Google Patents
A kind of cutting method of conductor material Download PDFInfo
- Publication number
- CN108080756A CN108080756A CN201711190109.6A CN201711190109A CN108080756A CN 108080756 A CN108080756 A CN 108080756A CN 201711190109 A CN201711190109 A CN 201711190109A CN 108080756 A CN108080756 A CN 108080756A
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- workpiece
- cutting
- electrode
- spark
- deionized water
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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
- B23H7/00—Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
- B23H7/02—Wire-cutting
-
- 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
- B23H11/00—Auxiliary apparatus or details, not otherwise provided for
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
The present invention relates to the technical fields of work piece cut, and in particular to a kind of cutting method of conductor material.The invention aims to overcome the problems, such as that existing spark cutting technology cutting workpiece surface quality is not high.To achieve the object of the present invention, using the deionized water of low-resistivity as electrolyte, workpiece is cut with two strip electrode silks in same position for a kind of method for cutting workpiece provided by the invention.Anodic solution principle is introduced into spark cutting technology by the present invention, can remove the re cast layer of workpiece surface after spark cutting workpiece, improves surface quality.The present invention is suitable for the cutting of all electrically conductive materials, applied widely.
Description
Technical field
The present invention relates to the technical fields of work piece cut, and in particular to a kind of cutting method of conductor material.
Background technology
In the cutting technique of conductor material, Wire EDM (WEDM) is a kind of common cutting technique, in engineering
In have a wide range of applications.Due in process, cutter (electrode) and workpiece need not simultaneously contact, and be not in contact with the production of power
It is raw, the hardness of workpiece can be ignored when cutting workpiece, therefore spark cutting technology more and more is used for cutting such as
The difficult-to-machine materials such as the very high alloy of hardness.
Electrical discharge machining is based on the thermoelectric power between electrode and workpiece.In processing, ensure there is foot between workpiece and electrode
Enough small gaps so that pulse voltage between workpiece and electrode can by electrolyte ionization, in the electrolyte in gap,
Generate very short pulsed discharge, the material of ablation workpiece by way of melting and gasifying.Since this processing of electric spark is special
Point, the workpiece surface after machining is made of the small rut left after countless spark ablation materials, therefore electrical discharge machining
Workpiece surface quality afterwards is general.In the gap of pulsed discharge, fusing moment stops, and the material of all fusings is set in again
The surface of material forms very thin one layer, is referred to as re cast layer.There are many small manufacturing deficiencies in re cast layer, for example, it is micro-
Aperture and micro-crack.Re cast layer can influence the fatigue strength of workpiece simultaneously, so in aviation field, some are important
Part does not allow the method using electrical discharge machining.
Therefore, when electric spark method is used to cut workpiece, face a needs urgently solve the problems, such as to be exactly electric spark
Workpiece surface has the problem of re cast layer causes workpiece surface quality not high after cutting workpiece.
The content of the invention
The present invention proposes a kind of cutting method of conductor material, and its purpose is to existing spark cutting technology is overcome to cut
Workpiece surface there is re cast layer, the problem of surface quality is not high.
In order to reach the purpose of the present invention, the present invention provides a kind of cutting methods of conductor material, are characterized in that：
Two strip electrode silks are mounted in same clamping tool, while workpiece is cut using two strip electrode silks, are packed into electrolyte tank
Electrolyte makes electrolyte be sprayed onto the top of work piece cut by nozzle by conduit, the electrolyte for low-resistivity go from
Sub- water, the electrical conductivity of deionized water are 1ms/cm-10ms/cm, and first electrode silk is first using the method for electric spark by work piece cut
It opens, pulse voltage uses anodic solution principle in 100V-200V, second electrode silk, and pulse voltage is down to 10V-30V, wire electrode
Feed speed is 2-8 μm/s, dissolves first electrode silk and cuts through pit and the re cast layer that rear workpiece surface leaves.
The beneficial effects of the invention are as follows：
1. anodic solution principle is introduced into spark cutting technology by the present invention, work after spark cutting can be removed
The re cast layer on part surface improves surface quality.
2. the present invention is compared with common spark cutting, while surface quality is improved there is no increase cut into
This, and cutting efficiency does not also significantly reduce.
3. the present invention is easy to operate, the clamping part of common spark cutting device electrode silk need to be only transformed, together
When uses deionized water, and as electrolyte, machined parameters operation according to the invention can be realized, and industrialization promotion has a extensive future.
4. the present invention is suitable for the cutting of all electrically conductive materials, applied widely.
Description of the drawings
The present invention is further described with reference to the accompanying drawings and examples
Fig. 1 is present invention cutting workpiece schematic diagram；
Fig. 2 is the principle of present invention cutting workpiece；
Fig. 3 is the surface of workpiece after spark cutting：(a) pit on surface；(b) surface re cast layer；
Fig. 4 anodic solutions front and rear surfaces compare：(a) re cast layer before anodic solution；(b) the smooth table after anodic solution
Face.
Specific embodiment
The present invention is described in detail below in conjunction with drawings and examples.
A kind of cutting method of conductor material provided by the invention is that two strip electrode silks are mounted on same clamping tool
In, while workpiece is cut using two strip electrode silks, first by workpiece clamp is on lathe made of conductor material, in electrolyte tank
Deionized water is packed into, deionized water is made to be sprayed onto the top of work piece cut by nozzle by conduit, the electrolyte is low resistance
The deionized water of rate, the electrical conductivity of deionized water is 1ms/cm-10ms/cm, and first electrode silk first will using the method for electric spark
Work piece cut is opened, and pulse voltage uses anodic solution principle in 100V-200V, second electrode silk, and pulse voltage is down to 10V-
30V, wire electrode feed speed are 2-8 μm/s, dissolve first electrode silk and cut through pit and the double teeming that rear workpiece surface leaves
Layer.
The method of the present invention is specifically implemented according to following steps：
Step 1 allocates the deionized water of low-resistivity as electrolyte, electrical conductivity 1ms/cm-10ms/cm；
Step 2, the cutting of first electrode silk, adjust machined parameters so that pulse voltage 100-200V, Voltage Pulse Width are
5 μ s-20 μ s, supply frequency 10KHz-100KHz, are packed into deionized water in electrolyte tank, make deionized water by conduit by
Nozzle is sprayed onto the top at work piece cut.The wire transporting speed of two strip electrode silks is 5m/s-10m/s, and wire electrode feed speed is set
For 2 μm/s-8 μm/s.
Step 3, second electrode silk cutting workpiece, adjustment pulse voltage is to 10V-30V, and other parameters are constant, second electrode
Silk proceeds by anodic solution, removes surface crater and re cast layer.
Embodiment 1
Step 1, using the deionized water of low-resistivity as electrolyte, electrical conductivity 3ms/cm；
Step 2, the cutting of first electrode silk, adjust machined parameters so that pulse voltage 120V, Voltage Pulse Width are 10 μ
S, supply frequency is 20KHz, and deionized water is packed into electrolyte tank, deionized water is made to be sprayed onto workpiece by nozzle by conduit and is cut
Cut the top at place.The wire transporting speed of two strip electrode silks is 5m/s, and the feed speed of wire electrode is arranged to 8 μm/s.
Step 3, second electrode silk cutting workpiece, adjustment pulse voltage to 25V, second electrode silk 8 μm/s of feed speed,
Its parameter constant, second electrode silk proceed by anodic solution processing, remove surface crater and re cast layer.
Embodiment 2
Step 1, using the deionized water of low-resistivity as electrolyte, electrical conductivity 6ms/cm；
Step 2, the cutting of first electrode silk, adjust machined parameters so that pulse voltage 160V, Voltage Pulse Width are 20 μ
S, supply frequency is 50KHz, and deionized water is packed into electrolyte tank, deionized water is made to be sprayed onto workpiece by nozzle by conduit and is cut
Cut the top at place.The wire transporting speed of two strip electrode silks is 8m/s, and mounting and clamping system drives wire electrode to start to feed, and feed speed is set
For 6 μm/s.
Step 3, second electrode silk cutting workpiece, adjustment pulse voltage to 20V, second electrode silk 6 μm/s of feed speed,
Its parameter constant, second electrode silk proceed by anodic solution processing, remove surface crater and re cast layer.
Referring to Fig. 1, it is characteristic of the invention that with two strip electrode silks (first electrode silk and second electrode silk) in same position
Cut workpiece.In order to realize above-mentioned method, two strip electrode silks are clipped together using fixture, the distance between two strip electrode silks
More than the thickness of workpiece.
Referring to Fig. 2, operation principle of the invention is：Use the deionized water of low-resistivity, electrical conductivity 1ms/cm-
10ms/cm, pulse voltage are applied to wire electrode and workpiece both ends, it is desirable that electrolyte can be generated by impulse voltage flashover
Spark, and can have faint electrochemical action.Two strip electrode silks are using molybdenum filament, a diameter of 0.22mm.Two strip electrode silks
The distance between be more than workpiece thickness.
Wire electrode feeds cutting workpiece from top to bottom, referring to Fig. 2 (a), when first electrode silk cuts workpiece, adjustment processing
Pulse voltage is adjusted to 100V-200V by parameter, and what it is due to electrolyte selection is deionized water, and voltage can will be electrolysed liquid hammer
It wears to generate spark discharge, the cutting mode for making first electrode silk is spark cutting.Due in spark cutting process
In, high temperature that workpiece surface material is generated due to spark discharge is melted and gasified, these subsequent materials are with wire electrode
Movement be spilled over cutting region, so the workpiece surface after the completion of spark cutting is by the pit group after countless spark ablations
Into as shown in Figure 3.Fig. 3 (a) can be seen that material surface is made of the pit left after countless spark ablations, it is evident that
Workpiece surface is by the trace of calcination.In the gap of pulsed discharge, the fusing of workpiece surface material and gasification moment stop, Suo Yourong
The material of change is set in the surface of material again, forms re cast layer, and Fig. 3 (b) is it can be seen that the pit that electric spark ablation leaves
And re cast layer.It can be seen that the workpiece surface after the completion of spark cutting is made of the pit after ablation and re cast layer, surface
It is of low quality.
In order to improve surface quality, pit and re cast layer that spark ablation stays in workpiece surface are eliminated, when first electrode silk
After work piece cut is opened, second electrode silk is started to work, and referring to Fig. 2 (b), pulse voltage is adjusted to 10V- by control system
30V well below the minimum voltage that impulse voltage flashover dielectric generates spark discharge, makes its deficiency generate spark and carry out electricity
Spark is processed.But since deionized water has faint electrochemical action, anodic solution can be generated to workpiece surface material.Cause
This, processing method at this time is converted into anodic solution of the wire electrode to material surface.According to Faraday's law, the feeding of wire electrode
Speed can influence the thickness of anodic solution material, so the feed speed of second electrode silk cannot be too fast or excessively slow, feed speed
It is too fast, re cast layer cannot be completely dissolved, the purpose for improving surface quality is not achieved, feed speed can then cause slowly excessively
Degree dissolving, joint-cutting become larger.The feed speed of second electrode silk is adjusted to 2 μm/s-8 μm/s, makes material thickness d of anodic solution etc.
In the thickness of re cast layer, make it that can just dissolve re cast layer, as shown in Fig. 4 (a), then second electrode silk can be by first electrode
The pit and re cast layer that silk spark discharge is left in workpiece surface dissolve, and improve surface quality, surface such as Fig. 4 after processing
(b) shown in, it can be seen that surface quality significantly improves, hence it is evident that better than the material surface after electric spark ablation.
Claims (1)
1. a kind of cutting method of conductor material, it is characterised in that：The method is that two strip electrode silks are mounted on same dress
In folder instrument, while workpiece is cut using two strip electrode silks, specific method is as follows：
When conductor workpiece is processed, the electrolyte selected is the deionized water of low-resistivity, and the electrical conductivity of deionized water is 1ms/
Cm-10ms/cm, first electrode silk are first opened work piece cut using the method for electric spark, and pulse voltage is in 100V-200V, and second
Wire electrode uses anodic solution principle, and pulse voltage is down to 10V-30V, and wire electrode feed speed is 2-8 μm/s, dissolves first
Wire electrode cuts through pit and the re cast layer that rear workpiece surface leaves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711190109.6A CN108080756A (en) | 2017-11-24 | 2017-11-24 | A kind of cutting method of conductor material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711190109.6A CN108080756A (en) | 2017-11-24 | 2017-11-24 | A kind of cutting method of conductor material |
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| Publication Number | Publication Date |
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| CN108080756A true CN108080756A (en) | 2018-05-29 |
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ID=62173060
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711190109.6A Pending CN108080756A (en) | 2017-11-24 | 2017-11-24 | A kind of cutting method of conductor material |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112372098A (en) * | 2020-11-04 | 2021-02-19 | 南京航空航天大学 | Straight-line component wire cut electrical discharge machining device and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW469203B (en) * | 1999-11-15 | 2001-12-21 | Mitsubishi Electric Corp | Method for treating a surface with electric discharge and apparatus therefor |
| CN101342624A (en) * | 2008-08-15 | 2009-01-14 | 南京航空航天大学 | Method for improving completeness integrity of electrospark wire-electrode cutting finished surface |
| CN103008809A (en) * | 2012-12-06 | 2013-04-03 | 中国工程物理研究院机械制造工艺研究所 | Combined machining method of metal materials |
| CN103231134B (en) * | 2013-05-08 | 2015-11-18 | 清华大学 | A kind of electrolysis electric spark sutting machining device of non-conducting material and method |
-
2017
- 2017-11-24 CN CN201711190109.6A patent/CN108080756A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW469203B (en) * | 1999-11-15 | 2001-12-21 | Mitsubishi Electric Corp | Method for treating a surface with electric discharge and apparatus therefor |
| CN101342624A (en) * | 2008-08-15 | 2009-01-14 | 南京航空航天大学 | Method for improving completeness integrity of electrospark wire-electrode cutting finished surface |
| CN103008809A (en) * | 2012-12-06 | 2013-04-03 | 中国工程物理研究院机械制造工艺研究所 | Combined machining method of metal materials |
| CN103231134B (en) * | 2013-05-08 | 2015-11-18 | 清华大学 | A kind of electrolysis electric spark sutting machining device of non-conducting material and method |
Non-Patent Citations (1)
| Title |
|---|
| 张彦: "微小孔电火花-电解复合加工基础研究", 《中国博士学位论文全文数据库 工程科技Ⅱ辑》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112372098A (en) * | 2020-11-04 | 2021-02-19 | 南京航空航天大学 | Straight-line component wire cut electrical discharge machining device and method |
| CN112372098B (en) * | 2020-11-04 | 2022-04-19 | 南京航空航天大学 | Straight-line component wire cut electrical discharge machining device and method |
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Application publication date: 20180529 |