CN1258426C - In-situ electrode loss compensating method for efficient discharge milling - Google Patents
In-situ electrode loss compensating method for efficient discharge milling Download PDFInfo
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- CN1258426C CN1258426C CN 02137874 CN02137874A CN1258426C CN 1258426 C CN1258426 C CN 1258426C CN 02137874 CN02137874 CN 02137874 CN 02137874 A CN02137874 A CN 02137874A CN 1258426 C CN1258426 C CN 1258426C
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Abstract
The present invention relates to an on-line electrode consumption compensation method for efficient electric discharge milling processing. The present invention is characterized in that in the process of efficient electric discharge milling processing, methods of on-line theoretical compensation and on-line detecting compensation are combined, and the two methods are alternately carried out to realize the on-line electrode consumption compensation in a combined mode. The combined mode comprises many-to-one alternation, one-to-one alternation or one-to-many alternation. The on-line compensation can be divided by time, an electrode trajectory distance or the interval of the combination of the time and the electrode trajectory distance. The on-line theoretical compensation uses experimental statistical data, empirical formula calculated data or theoretical calculation data as bases. The on-line detecting compensation comprises: a reference plane is arranged correspondingly to a workpiece, and actual compensation of the electrode is detected by the contact detection between the electrode and the reference plane. The method of the present invention has efficient, continuous and exact optimal comprehensive effect, requirements of difference processing precision can be met by flexible combination of the two compensation modes, and the present invention is an efficient method for controlling the precision of electric discharge milling processing.
Description
Technical field
The present invention relates to a kind of discharging milling and process online compensation for electrode wear method, particularly in-situ electrode loss compensating method for efficient discharge milling.
Background technology
In fields such as Aero-Space, military project, gas turbine, mould, there are the parts of a lot of special materials to process, such as titanium alloy, high temperature heat-resisting stainless steel etc., these tack of materials are stronger, poor thermal conductivity, machining property is very poor, working (machining) efficiency is extremely low, and the cutter expense is also very big, has therefore seriously restricted the technological progress and the development of these industries.In recent years, develop rapidly along with EDM Technology and technological level, milling shaping process technology at above-mentioned special material has been carried as the forward position EDM Technology, and wherein, the discharge layered milling more and more is subjected to people's attention as a kind of new process.The disruptive technology progress that it brings for discharge process and designing institute, and with the design philosophy of simple electrode processed complex workpiece and flexibly processing method also more and more approved by vast colleague.Especially adopt the efficient discharging milling processing method that the part of these special materials is carried out roughing, its advantageous characteristics are arranged again, its effect is that machine cut processing is incomparable, also is simultaneously a kind of very main trend of discharge processing and milling technological development.But, in efficient discharging milling processing, because electric current is very big, export license is quite outstanding, therefore run into two aspect difficult problems usually in the application process, first is how to solve the length issue that electrode can compensate, so that keep the continuation of highly-efficient processing in discharging milling processing.Second is to solve the problem how to compensate, this problem solve the fine or not direct machining accuracy that influences.Concerning efficient discharging milling processing, because the export license amount is bigger, the problem of thereupon bringing is: the dimensional accuracy and the copying accuracy of workpiece to be machined descend greatly, especially to the processing of many types of chamber, can't guarantee each cavity dimension precision unanimity.In the prior art, a kind of method is that export license is detected and online compensation; Another kind method is directly by software export license to be carried out theoretical online compensation.Yet dual mode cuts both ways by contrast, if adopt first method, obviously precision problem is solved, but the time of having spent because of detection descends working (machining) efficiency at double.If employing second method, although working (machining) efficiency is not had influence, because there is ambiguity in process conditions, the compensation rate and the deviation between the active loss of electrode are bigger and bigger as time passes, finally make the machining accuracy error too big, can't guarantee required precision.Above-mentioned in a word two kinds of methods all are difficult to accomplish to make the best of both worlds in practice.At the problems referred to above, the present invention has proposed a kind of compensation for electrode wear method that is suitable for efficient discharging milling processing, to overcome above-mentioned deficiency emphatically from solving the problem how to compensate.As for how solving the length issue that electrode can compensate, we will be described in another patent application.
Summary of the invention
For achieving the above object, the technical solution used in the present invention is: a kind of discharging milling is processed online compensation for electrode wear method, in the discharging milling process, two kinds of methods of online theoretical compensation and online detection compensation are combined, alternately export license is carried out online compensation mutually with compound mode.
Relevant changing content in the technique scheme is explained as follows:
One, described online theoretical compensation is exemplified below with the compound mode of online detection compensation:
1, online theoretical compensation is carried out with the many-one over-over mode with online detection compensation.After described many-one alternately specifically is meant and repeatedly compensates by theoretical offset data, transfer online detection compensation to once, and then repeatedly compensate, repeatedly with this by theoretical offset data.Described repeatedly compensation is meant once above connotation.
Particularly in the continuous processing of a discharging milling stroke, adopt online theoretical compensation in this compensation way, between two milling strokes move back electrode or commutation the time adopt benchmark that the electrode detection data are carried out online compensation.That this method is applied in is thick, best results in the processing of the high-efficient milling of middle precision.
2, online theoretical compensation and online detection compensation are carried out with over-over mode one to one.Described alternately specifically be meant one to one carry out single compensation by theoretical offset data after, transfer online detection compensation to once, repeatedly with this.
3, online theoretical compensation is carried out with the one-to-many over-over mode with online detection compensation.After described one-to-many alternately specifically is meant and carries out single compensation by theoretical offset data, transfer online detection compensation to repeatedly, and then carry out single compensation, repeatedly with this by empirical data.
4, will make up the over-over mode of acquisition with upper type.
More than several modes be representative several typical case, over-over mode of the present invention comprises strictly all rules and irregular compound mode.
Two, the interval of twice online compensation further can comprise following several situation:
1, online compensation was divided with the time interval.
2, online compensation with the electrode movement track apart from division.
3, online compensation is with the division that combines of the time interval and electrode movement track distance.
4, online compensation with discharging milling processing technology hierarchical nature and electrode movement track apart from division.
Three, online theoretical compensation serves as according to export license is carried out online compensation with experiment statistics data, empirical equation calculated data or theoretical calculated data.
Four, online detection is compensated for as relative workpiece setting datum level, and the contact detection electrode physical length by electrode and datum level can draw waste and compensate.The workpiece setting datum level is included in and datum level is set on the processing parts and two kinds of situations of datum level are set on workbench relatively.Described datum level can be sphere, plane, ring surface etc., during specific implementation electrode and workpiece are located, then electrode is moved on on the datum level, adopt the height of connecting circuit or contact perception measurement electrode Z axial end, and relevant position data is handled by computer.
Operation principle of the present invention is: in every layer of Milling Process, progressively give the fixed electrode amount of feeding on request, export license is carried out online compensation, during online compensation two kinds of methods of online theoretical compensation and online detection compensation are combined, alternately export license is compensated mutually with compound mode, with realize efficiently, continuously, best resultant effect accurately.
Because the technique scheme utilization, the present invention compared with prior art has following advantage:
1, the present invention is in discharging milling processing, two kinds of methods of online theoretical compensation and online detection compensation are combined, alternately export license is compensated mutually with compound mode, so both well absorbed the advantage of two kinds of compensation ways, effectively overcome simultaneously both deficiencies, especially be significant for the efficient discharging milling electric machining.
2, the present invention is in every layer of Milling Process, the mode of carrying out with online gross data and two kinds of compensation of online detection data mutual alternative compensates export license, this discharge-treating method not only has efficiently, continuously, best resultant effect accurately, and can satisfy different machining accuracies by the flexible combination of two kinds of compensation ways, obviously seem masterly as a kind of efficient electric spark milling process method.
3, applicability of the present invention is relatively wide, automaticity is high, practical, flexible, can carry out that self study is measured automatically and compensation automatically according to the size of export license amount behind one or several die cavity of processing, also can thick, in, use respectively in the fine finishining.
The specific embodiment
Below in conjunction with embodiment the present invention is further described:
Embodiment: when adopting efficient discharging milling machining titanium alloy or high temperature heat-resisting workpiece, its online compensation for electrode wear method is: in the efficient discharging milling process, two kinds of methods of online theoretical compensation and online detection compensation are combined, alternately export license is compensated mutually with five pairs one compound modes.Can set in conjunction with concrete milling process: in a milling stroke, adopt five gross datas to carry out online compensation, and between two milling strokes, adopt online benchmark that the electrode detection data are compensated, repeatedly with this.Theoretical compensation makes Milling Process keep good continuity, but theoretical compensation is because actual process condition difference, there is certain error, and this error deviation after repeatedly accumulating is increasing, after a milling stroke finishes, export license is being carried out the tool setting detection, again the electrode active loss amount of actual measurement is being carried out the correcting property compensation.The compensation method that this combined process makes up is very effective in practice.The interval of above theoretical online compensation both can be divided by electrode movement track distance principle, promptly after moving a certain distance, electrode just carries out once theoretical online compensation, and the big I of distance is determined according to the length and the theoretical compensation number of times of a milling stroke, also can compensate according to time principle.In the present embodiment, it is foundation that the experiment statistics data are adopted in described online theoretical compensation, by the corresponding amount of feeding of software set.The experiment statistics data are obtained by experimental data and statistical analysis.Described online detection is compensated for as datum level is set on workpiece, and the contact detection electrode active loss amount by electrode and datum level compensates.Described datum level can be sphere, plane, ring surface etc., during specific implementation electrode and workpiece are located, under the control of digital control system, electrode is moved on on the datum level then, adopt the height of connecting circuit or contact perception measurement electrode Z axial end, and related data is handled by computer.When tool setting, can also repair in the aforesaid operations process electrode.
Claims (10)
1, a kind of discharging milling is processed online compensation for electrode wear method, it is characterized in that:
In the discharging milling process, two kinds of methods of online theoretical compensation and online detection compensation are combined, alternately export license is carried out online compensation mutually with compound mode.
2, online compensation for electrode wear method according to claim 1 is characterized in that: described online theoretical compensation is the many-one over-over mode with the compound mode of online detection compensation.
3, online compensation for electrode wear method according to claim 2, it is characterized in that: in the continuous processing of a milling stroke, adopt online theoretical compensation, between two milling strokes move back electrode or commutation the time adopt benchmark that the electrode detection data are carried out online compensation.
4, online compensation for electrode wear method according to claim 1 is characterized in that: the compound mode of described online theoretical compensation and online detection compensation is over-over mode one to one.
5, online compensation for electrode wear method according to claim 1 is characterized in that: described online theoretical compensation is the one-to-many over-over mode with the compound mode of online detection compensation.
6, online compensation for electrode wear method according to claim 1, it is characterized in that: described online compensation was divided with the time interval.
7, online compensation for electrode wear method according to claim 1 is characterized in that: described online compensation with the electrode movement track apart from division.
8, online compensation for electrode wear method according to claim 1 is characterized in that: described online compensation is with the division that combines of the time interval and electrode movement track distance.
9, online compensation for electrode wear method according to claim 1 is characterized in that: described online theoretical compensation adopts experiment statistics data, empirical equation calculated data or theoretical calculated data for foundation export license to be carried out online compensation.
10, online compensation for electrode wear method according to claim 1, it is characterized in that: described online detection is compensated for as relative workpiece setting datum level, and the contact detection electrode physical length by electrode and datum level compensates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02137874 CN1258426C (en) | 2002-06-27 | 2002-06-27 | In-situ electrode loss compensating method for efficient discharge milling |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02137874 CN1258426C (en) | 2002-06-27 | 2002-06-27 | In-situ electrode loss compensating method for efficient discharge milling |
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| CN1387971A CN1387971A (en) | 2003-01-01 |
| CN1258426C true CN1258426C (en) | 2006-06-07 |
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| CN 02137874 Expired - Fee Related CN1258426C (en) | 2002-06-27 | 2002-06-27 | In-situ electrode loss compensating method for efficient discharge milling |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101982280A (en) * | 2010-09-16 | 2011-03-02 | 苏州电加工机床研究所有限公司 | Method for compensating electrode loss based on discharge energy in electricity discharge milling process |
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| CN103286394B (en) * | 2012-02-28 | 2015-09-09 | 沈阳黎明航空发动机(集团)有限责任公司 | A kind of casing electric discharge milling accuracy control method |
| CN106180923B (en) * | 2015-04-29 | 2018-08-21 | 首都航天机械公司 | A kind of micro three-dimensional structure electric spark milling process method |
| CN108340035B (en) * | 2017-01-25 | 2021-03-30 | 北京阿奇夏米尔工业电子有限公司 | Hole depth determination method, calculation control system and electrode machining device |
| CN106944683B (en) * | 2017-03-17 | 2019-07-26 | 广东工业大学 | A kind of electric discharge turning machining device that tool-electrode compensates automatically and method |
| CN108340033A (en) * | 2018-04-20 | 2018-07-31 | 北京迪蒙吉意超硬材料技术有限公司 | Process the EDM shaping machine intelligent depth control system and method for PCD composite sheets |
| CN109202192B (en) * | 2018-10-31 | 2019-09-17 | 清华大学 | Fine electric spark servo scanning machined parameters preferred method and system |
| CN110394513A (en) * | 2019-07-22 | 2019-11-01 | 北京理工大学 | A kind of correcting compensation method in place of combination electrode processing multistage microstructural |
| CN111203600B (en) * | 2020-01-19 | 2020-11-10 | 大连大学 | Novel spiral milling electric spark machining method |
| CN114571019B (en) * | 2022-03-16 | 2023-10-13 | 上海空间推进研究所 | Electric spark milling method |
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2002
- 2002-06-27 CN CN 02137874 patent/CN1258426C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101982280A (en) * | 2010-09-16 | 2011-03-02 | 苏州电加工机床研究所有限公司 | Method for compensating electrode loss based on discharge energy in electricity discharge milling process |
| CN101982280B (en) * | 2010-09-16 | 2012-09-19 | 苏州电加工机床研究所有限公司 | Method for compensating electrode loss based on discharge energy in electricity discharge milling process |
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| CN1387971A (en) | 2003-01-01 |
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