CN103706904B - Through-hole inner surface magnetic control electric discharge machining apparatus and method - Google Patents
Through-hole inner surface magnetic control electric discharge machining apparatus and method Download PDFInfo
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- CN103706904B CN103706904B CN201310682477.8A CN201310682477A CN103706904B CN 103706904 B CN103706904 B CN 103706904B CN 201310682477 A CN201310682477 A CN 201310682477A CN 103706904 B CN103706904 B CN 103706904B
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Abstract
Through-hole inner surface magnetic control electric discharge machining apparatus comprises electrode, workpiece is fixed on workbench, gap is left between electrode and the through-hole inner surface to be processed of workpiece, Workpiece periphery is provided with magnetic field generation mechanisms, described magnetic field generation mechanisms comprises shell, be socketed in the coil of coiling on the magnetic core array of Workpiece periphery and magnetic core array, shell covers the magnetic core array periphery being wound with coil, shell is made up of permeability magnetic material, described magnetic field generation mechanisms is fixed on movable plate, movable plate drives moving axially along through hole to be processed by actuating unit, outside take-up mechanism extraction electrodes moving axially along through hole to be processed, during energising, the electric arc that electrode produces is positioned at the magnetic field that described magnetic field generation mechanisms produces.The invention also discloses the processing method rotated by field drives electric spark accordingly.The present invention in electrode non rotating, the fixed situation of workpiece, can complete the spark machined of the through-hole inner surface with through-hole parts, guarantees machining accuracy and processing stability.
Description
Technical field
The present invention relates to Micrometer-Nanometer Processing Technology field, be specifically related to minute aperture spark erosion technique field, particularly relate to workpiece to be processed and maintain static, utilize magnetic field under irrotational relative static conditions, to realize the accurately machined device and method of tubular member inner surface to make wire electrode simultaneously.
Background technology
Spark machined develops comparatively ripe method in microfabrication, it is applicable to the retrofit of micron scale construction size very much, spark machined minute aperture has that processing diameter is little, precision is high and can be placed on heat treatment aft-loaded airfoil, the advantage such as easily to be automated, and spark erosion technique is widely used in micro processing field.Because the Basic Mechanism of electric spark minute aperture processing is the pulse feature spark discharge utilized between workpiece and tool-electrode, produce instantaneous high-temperature and make workpiece material surface local melting and vaporization ablation selectively, thus obtain the parts of definite shape size and surface roughness requirements, therefore, when spark machined minute aperture, need to make wire electrode at the uniform velocity rotate to make electric arc charged particle form uniform circular motion relative to workpiece, or workpiece is rotated relative to wire electrode, complete the processing of minute aperture thus, disclosed in Chinese patent CN1266764A " electrospark equipment for machining precise fine holes ", it is by having turnbarrel, clamping mechanism open in usual, the Rotary electrode wire feeding composite structure of the micro-electrode of the labyrinths such as normally closed type clamping mechanism controls the feeding of the wire electrode in rotation, the processing of its minute aperture is completely based on the mechanism that wire electrode rotary motion makes electric arc charged particle circle, there is following defect in the method that minute aperture processing is carried out in this wire electrode rotary motion: first, there is error in wire electrode rotary motion, affect the stability of minute aperture machining accuracy and processing, and need to arrange the complicated mechanism that wire electrode is rotated, the second, in wire electrode high speed rotary motion process, destructive failure situations such as " twisting into two parts " that wire electrode there will be, affects the stability of minute aperture processing.In addition, no matter be that wire electrode rotates or the spark machined that workpiece rotates in prior art, all do not disclose the accurately machined spark machined of the direct through-hole inner surface for the part with through hole.
Summary of the invention
The applicant improves for above-mentioned shortcoming of the prior art, a kind of through-hole inner surface magnetic control electric discharge machining apparatus and method are provided, it can in electrode non rotating, the fixed situation of workpiece, complete the spark machined of the through-hole inner surface with through-hole parts, guarantee machining accuracy and processing stability.
Technical scheme of the present invention is as follows:
Through-hole inner surface magnetic control electric discharge machining apparatus of the present invention, comprise electrode, electrode two ends are connected with wire, workpiece is fixed on workbench, gap is left between electrode and the through-hole inner surface to be processed of workpiece, the periphery of workpiece is provided with magnetic field generation mechanisms, described magnetic field generation mechanisms comprises shell, be socketed in the coil of coiling on the magnetic core array of Workpiece periphery and magnetic core array, shell covers the magnetic core array periphery being wound with coil, shell is made up of permeability magnetic material, described magnetic field generation mechanisms is fixed on movable plate, movable plate drives moving axially along through hole to be processed by actuating unit, outside take-up mechanism extraction electrodes moving axially along through hole to be processed, during energising, the electric arc that electrode and workpiece produce is positioned at the magnetic field that described magnetic field generation mechanisms produces.
Its further technical scheme is:
Described shell is provided with cooling water inlet and coolant outlet, for making the space between cooling water turnover magnetic core array and outer casing inner wall.
Described actuating unit adopts screw pair, the screw in described screw pair and movable plate affixed.
Inert gas has been passed in the through hole to be processed of described workpiece.
Through-hole inner surface magnetic control electric discharge machining method of the present invention, comprises following steps:
The first step, is fixed on workpiece on processing platform, is moved to the bottom of the through hole to be processed of workpiece by outside take-up mechanism extraction electrodes;
Second step, arc power is connected between the through hole to be processed and electrode of workpiece, electric discharge forms electric arc, simultaneously, magnetic core array forms externally-applied magnetic field with coil by being connected field power supply, and under the influence of a magnetic field, the charged particle in electric spark produces rotary motion, drive electric arc to rotate thus, electric arc starts to process the inner surface of through hole to be processed;
3rd step, movable plate moving axially along through hole to be processed is driven by actuating unit, simultaneously by outside take-up mechanism extraction electrodes moving axially along through hole to be processed, the two movement meets electric arc that electrode produces and is positioned at the magnetic field that described magnetic field generation mechanisms produces, and processes until complete the inner surface of through hole to be processed.
Its further technical scheme is:
After described first step, before second step, cooling water is passed into space between magnetic core array and outer casing inner wall by the cooling water inlet on shell, and opens coolant outlet, make cooling water circulation pass in and out space between magnetic core array and outer casing inner wall.
In the edm process of described second step and the 3rd step, in the through hole to be processed of described workpiece, pass into inert gas.
Technique effect of the present invention:
The present invention is on the basis of traditional spark machined, add magnetic field generation mechanisms, compared to traditional spark machined, additional coil and magnetic core array is utilized to produce magnetic field, and make the electric spark of generation be in territory, magnetic field all the time, make the electrical discharge arc High Rotation Speed under the influence of a magnetic field between electrode and workpiece, electric spark charged particle is spinned along magnetic induction line and is moved in uniform magnetic field, drive described magnetic field generation mechanisms and electrode to move axially along workpiece through hole to be processed simultaneously, until complete the fine finishining of workpiece through hole to be processed, the present invention utilizes additional coil and magnetic core array to produce magnetic field, electrical discharge arc between drive electrode and workpiece rotates, thus maintain static at workpiece, electrode is not without the need to rotation and by the fine finishining of the inner surface of complete hole pairs under the state of External force interference, because electrode is without the need to rotation, and workpiece is also without the need to rotating, thus machining accuracy and processing stability can be guaranteed, in edm process, between shell and magnetic core array, fantasy passes into cooling water, can carry out cooling down to workpiece, coil, electrode, passes into inert gas between the through hole to be processed and electrode of workpiece simultaneously, can high-temperature oxydation be prevented, improve crudy.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the electric spark of device of the present invention generation and the motion process schematic diagram in magnetic field.
Wherein: 1, electrode; 2, wire; 3, workpiece; 301, through hole to be processed; 302, through hole is processed; 4, magnetic core array; 5, coil; 6, shell; 601, cooling water inlet; 602, coolant outlet; 7, movable plate; 8, screw pair.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described.
See Fig. 1, through-hole inner surface magnetic control electric discharge machining apparatus of the present invention comprises electrode 1, electrode 1 two ends are connected with wire 2, workpiece 3 is fixed on workbench, gap is left between through hole to be processed 301 inner surface of electrode 1 and workpiece 3, the periphery of workpiece 3 is provided with magnetic field generation mechanisms, described magnetic field generation mechanisms comprises shell 6, be socketed in the coil 5 of coiling on the magnetic core array 4 of workpiece 3 periphery and magnetic core array 4, shell 6 covers magnetic core array 4 periphery being wound with coil 5, shell 6 is made up of permeability magnetic material, magnetic permeability shell 6 likes the effect to shielding, described magnetic field generation mechanisms is fixed on movable plate 7, movable plate 7 drives moving axially along through hole 301 to be processed by actuating unit, particularly, described actuating unit adopts screw pair 8, screw in screw pair 8 and movable plate 7 affixed, described actuating unit also can adopt belt transmission, the power drive mechanism that the mechanical fields such as Worm Wheel System are common, outside take-up mechanism extraction electrodes 1 moving axially along through hole 301 to be processed, during energising, the electric arc that electrode 1 and workpiece 3 produce is positioned at the magnetic field that magnetic field generation mechanisms produces.
Further, shell 6 is provided with cooling water inlet 601 and coolant outlet 602, for making the space between cooling water turnover magnetic core array 4 and shell 6 inwall, thus cools described magnetic field generation mechanisms; Pass into inert gas in the through hole to be processed 301 of workpiece 3, prevented workpiece high-temperature oxydation, ensure crudy.
Through-hole inner surface magnetic control electric discharge machining method of the present invention, comprises following steps:
The first step, is fixed on processing platform by workpiece 3, is moved to the bottom of the through hole to be processed 301 of workpiece 3 by outside take-up mechanism extraction electrodes 1, and between the inner surface of electrode 1 and through hole to be processed 301 between leave gap;
Second step, arc power is connected between the through hole to be processed 301 and electrode 1 of workpiece 3, electric discharge forms electric arc, simultaneously, magnetic core array 4 forms externally-applied magnetic field with coil 5 by being connected field power supply, and under the influence of a magnetic field, the charged particle in the electric spark produced between workpiece 3 and electrode 1 produces rotary motion, drive electric arc to rotate thus, electric arc starts to carry out circumferential processing to the inner surface of through hole 301 to be processed;
3rd step, movable plate 7 moving axially along through hole 301 to be processed is driven by actuating unit, simultaneously by outside take-up mechanism extraction electrodes 1 moving axially along through hole 301 to be processed, the two movement meets electric arc that electrode 1 produces and is positioned at the magnetic field that magnetic field generation mechanisms produces, and preferably the movement of movable plate 7 hastens consistent with the galvanic corrosion speed of the electric arc produced to through hole 301 to be processed, to ensure the safety of processing and equipment completely to hole, movable plate 7 and electrode 1 move axially until complete and process the inner surface of through hole 301 to be processed, formed after the fine finishining that through hole 301 to be processed is lighted a fire and process through hole 302.
After machining, electrode 1, coil 5 power-off, stop cooling water supply.
Further, after described first step, before second step, cooling water is passed into space between magnetic core array 4 and shell 6 inwall by the cooling water inlet 601 on shell 6, and open coolant outlet 602, make the space between cooling water circulation turnover magnetic core array 4 and shell 6 inwall, cooling down is carried out to described magnetic field generation mechanisms, electrode, workpiece, simultaneously in the edm process of second step and the 3rd step, inert gas has been passed in the through hole to be processed 301 of workpiece 3, while cooling, prevent high-temperature oxydation.
The present invention is compared to traditional spark machined, additional coil and magnetic core array is utilized to produce magnetic field, and make the electric spark of generation be in territory, magnetic field all the time, make the electrical discharge arc High Rotation Speed under the influence of a magnetic field between electrode and workpiece, electric spark charged particle is spinned along magnetic induction line and is moved in uniform magnetic field, the helix with arrow in Fig. 2 is seen in electric arc screw path, magnetic direction is shown in the closed path with arrow in Fig. 2, the screw of described electric spark charged particle is made up of two parts: along magnetic induction line linear uniform motion and the uniform circular motion around magnetic induction line, the present invention utilizes additional coil and magnetic core array to produce magnetic field, electrical discharge arc between drive electrode and workpiece rotates, thus maintain static at workpiece, electrode is without the need to rotating and not carrying out fine finishining further by under the state of External force interference to the inner surface in hole.
More than describing is explanation of the invention, and be not the restriction to invention, limited range of the present invention, see claim, within protection scope of the present invention, can do any type of amendment.
Claims (7)
1. through-hole inner surface magnetic control electric discharge machining apparatus, it is characterized in that: comprise electrode (1), electrode (1) two ends are connected with wire (2), workpiece (3) is fixed on workbench, gap is left between through hole to be processed (301) inner surface of electrode (1) and workpiece (3), the periphery of workpiece (3) is provided with magnetic field generation mechanisms, described magnetic field generation mechanisms comprises shell (6), be socketed in the magnetic core array (4) of workpiece (3) periphery and the coil (5) of the upper coiling of magnetic core array (4), shell (6) covers magnetic core array (4) periphery being wound with coil (5), shell (6) is made up of permeability magnetic material, described magnetic field generation mechanisms is fixed on movable plate (7), movable plate (7) drives moving axially along through hole to be processed (301) by actuating unit, outside take-up mechanism extraction electrodes (1) moving axially along through hole to be processed (301), during energising, the electric arc that electrode (1) and workpiece (3) produce is positioned at the magnetic field that described magnetic field generation mechanisms produces.
2. by through-hole inner surface magnetic control electric discharge machining apparatus according to claim 1, it is characterized in that: described shell (6) is provided with cooling water inlet (601) and coolant outlet (602), for making the space between cooling water turnover magnetic core array (4) and shell (6) inwall.
3. by through-hole inner surface magnetic control electric discharge machining apparatus according to claim 1, it is characterized in that: described actuating unit adopts screw pair, the screw in described screw pair and movable plate (7) affixed.
4., by the through-hole inner surface magnetic control electric discharge machining apparatus described in the arbitrary claim of claims 1 to 3, it is characterized in that: in the through hole to be processed (301) of described workpiece (3), passed into inert gas.
5. through-hole inner surface magnetic control electric discharge machining method, is characterized in that, comprises following steps:
The first step, is fixed on processing platform by workpiece (3), is moved to the bottom of the through hole to be processed (301) of workpiece (3) by outside take-up mechanism extraction electrodes (1);
Second step, arc power is connected between the through hole to be processed (301) and electrode (1) of workpiece (3), electric discharge forms electric arc, simultaneously, magnetic core array (4) forms externally-applied magnetic field with coil (5) by being connected field power supply, and under the influence of a magnetic field, the charged particle in electric spark produces rotary motion, drive electric arc to rotate thus, electric arc starts to process the inner surface of through hole to be processed (301);
3rd step, movable plate (7) moving axially along through hole to be processed (301) is driven by actuating unit, simultaneously by outside take-up mechanism extraction electrodes (1) moving axially along through hole to be processed (301), the two movement meets electric arc that electrode (1) produces and is positioned at the magnetic field that magnetic field generation mechanisms produces, and processes until complete the inner surface of through hole to be processed (301).
6. by through-hole inner surface magnetic control electric discharge machining method according to claim 5, it is characterized in that: after described first step, before second step, the cooling water cooling water inlet (601) passed through on shell (6) is passed into the space between magnetic core array (4) and shell (6) inwall, and open coolant outlet (602), make the space between cooling water circulation turnover magnetic core array (4) and shell (6) inwall.
7., by the through-hole inner surface magnetic control electric discharge machining method described in claim 5 or 6, it is characterized in that: in the edm process of described second step and the 3rd step, in the through hole to be processed (301) of described workpiece (3), passed into inert gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310682477.8A CN103706904B (en) | 2013-12-10 | 2013-12-10 | Through-hole inner surface magnetic control electric discharge machining apparatus and method |
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| CN201310682477.8A CN103706904B (en) | 2013-12-10 | 2013-12-10 | Through-hole inner surface magnetic control electric discharge machining apparatus and method |
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| CN103706904A CN103706904A (en) | 2014-04-09 |
| CN103706904B true CN103706904B (en) | 2016-04-20 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101112727A (en) * | 2007-08-24 | 2008-01-30 | 清华大学 | Direct-current arc electric spark processing method |
| CN102294525A (en) * | 2011-08-22 | 2011-12-28 | 无锡微研有限公司 | Taper angle rolling pendulum mechanism for electrosparking fine reversed cone hole |
| JP2012125903A (en) * | 2010-12-17 | 2012-07-05 | Denso Corp | Electric discharge machine |
| CN102837092A (en) * | 2012-09-25 | 2012-12-26 | 烟台大学 | Rotary-arc coupling discharging milling device |
| CN103317207A (en) * | 2013-06-08 | 2013-09-25 | 烟台大学 | Magnetic-control arc shaft processing device and method |
-
2013
- 2013-12-10 CN CN201310682477.8A patent/CN103706904B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101112727A (en) * | 2007-08-24 | 2008-01-30 | 清华大学 | Direct-current arc electric spark processing method |
| JP2012125903A (en) * | 2010-12-17 | 2012-07-05 | Denso Corp | Electric discharge machine |
| CN102294525A (en) * | 2011-08-22 | 2011-12-28 | 无锡微研有限公司 | Taper angle rolling pendulum mechanism for electrosparking fine reversed cone hole |
| CN102837092A (en) * | 2012-09-25 | 2012-12-26 | 烟台大学 | Rotary-arc coupling discharging milling device |
| CN103317207A (en) * | 2013-06-08 | 2013-09-25 | 烟台大学 | Magnetic-control arc shaft processing device and method |
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| CN103706904A (en) | 2014-04-09 |
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