CN1270861C - Method for efficient discharge milling with hollow long electrode - Google Patents
Method for efficient discharge milling with hollow long electrode Download PDFInfo
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- CN1270861C CN1270861C CN 02137873 CN02137873A CN1270861C CN 1270861 C CN1270861 C CN 1270861C CN 02137873 CN02137873 CN 02137873 CN 02137873 A CN02137873 A CN 02137873A CN 1270861 C CN1270861 C CN 1270861C
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Abstract
The present invention relates to a method by using a simply hollow and long electrode to carry out high-efficiency milling and discharging machining. The present invention is characterized in that on the basis of numerical control technology, the simply hollow and long electrode is used, a guide guides, and a workpiece is discharged and milled, wherein a cross section of the simply long electrode is simple; the electrode is in a hollow structure which can inwards flush liquid; the length-to-diameter ratio of the electrode is more than 30 to 1. The present invention adopting the simply hollow and long electrode is the key for ensuring high-efficiency discharging and milling, which provides the possibility of the electrode continuously compensating in large length. The method breaks through the old tradition in actual effect, and the unexpected advantages are obtained. The present invention has the advantage that the discharging and milling efficiency is high on special materials with poor machining property, such as titanium alloy, high-temperature heat-resistant alloy, stainless steel, etc., complex electrodes do not need to be manufactured, and the cost is low, which has significance on the special materials in fields of aerospace, aviation, military industry, gas turbines, moulds, etc; the continuity of high-efficiency machining can be effectively maintained, and the present invention can not frequently generate the phenomenon that the machining is interrupted due to the exchange of the electrodes.
Description
Technical field
The present invention relates to a kind of efficient discharging milling and shape method, particularly based on Numeric Control Technology and adopt simple hollow long electrode to carry out the discharge-treating method of high-efficient milling by discharge (as electric arc, electric spark).
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, general spark-erosion sinking processing need be used the complicated electrode consistent with the processing cavity shape, the manufacturing of electrode is difficulty and cost height relatively, and the electric spark layered milling more and more is subjected to people's attention as a kind of new process.The breakthrough development that it brings for electrical discharge machining 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.It is so particularly to be applied to process similar titanium alloy, its effect is that machine cut processing is incomparable when poor thermal conductivity, tough workpiece, especially adopt the efficient discharge processing method that the part of these special materials is carried out roughing, its advantageous characteristics are arranged again, also are simultaneously a kind of very main trend of electric machining milling process development.But in efficient discharging milling processing, because electric current is very big, export license is quite outstanding, so runs into two aspect difficult problems in the application process usually, and first is how to solve the problem that electrode can compensate, so that keep the continuation in the efficient discharge processing.Because of in other electric spark milling research, all adopting short stick electrode to process at present, limited the compensation ability behind the electrode processing loss like this, particularly in efficient discharging milling processing, the export license increase causes frequently changing electrode, therefore not only greatly reduce working (machining) efficiency, and make operation become complicated.Obviously, this method is that practical level is less in efficient spark machined.Second is to solve the problem how export license compensates, this problem solve the fine or not direct machining accuracy that influences.Concerning the high-efficient milling electric machining, because export license 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 proposes a kind of electric processing method that efficient discharging milling is shaped, practical, that electrode can conveniently compensate that is suitable for.As for the problem how export license compensates, 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 method that adopts hollow electrode to carry out the high-efficient milling electric machining, on the Numeric Control Technology basis, adopt hollow electrode to add the guider guiding and carry out interior outwash liquid, workpiece is carried out discharging milling shaping processing, and wherein said hollow electrode is:
(1), the electrode sections profile formed through one or many cutting vertically by cylinder or on the cylinder basis, and electrode axis to the cross sectional shape of diverse location with big or small identical;
(2), electrode is that hollow can be interior towards liquid;
(3), the draw ratio of electrode is more than 30: 1.
The related content of technique scheme is explained as follows:
1, the notion one of described electrode is meant the simple electrode of profile, such as adopting the profile of cylinder as electrode usually; Two are meant that electrode axis is identical with size to the cross sectional shape of diverse location, but electrode install retained part can except.Here it is emphasized that cutting formed profile on the basis of simple geometric shape still is included in simple profile and has within the scope, cut formed cylindricality and belong to simple electrode such as on the cylinder basis, carrying out one or many vertically.From electrode profile angle, bar-shaped cylinder is the simplest, processes also easily, but considers that sometimes chip removal is convenient, bar-shaped cylinder is cut on one side vertically or both sides also are very resultful.
2, the notion of long electrode be meant the length of electrode and radial dimension proportion requirement more than 30: 1, proportionate relationship sees that from the angle of high-efficiency and continuous processing best proportionate relationship is more than 80: 1 more than 50: 1 preferably.Because the efficient discharging milling processing electric current is very big, the corresponding electrode loss is also very big, if electrode does not provide temporal continuity in process, its practicality and effect will descend greatly, even processing is insignificant to efficient discharge.Therefore in the present invention, long electrode is the key that guarantees efficient discharging milling processing, and the possibility of continuous, the big length compensation of electrode is provided.We have accomplished the absolute growth of electrode more than the 1000mm in the experiment, and from actual effect, this way has been broken traditional concept in the past, has received unexpected effect.This effect is mainly reflected in following two aspects: the one, and high especially to the special material discharging milling working (machining) efficiency of machining property differences such as titanium alloy, high temperature heat-resisting stainless steel, need not make complicated electrode, cost is low, and especially the processing to special material in the fields such as space flight and aviation, military project, gas turbine, mould is significant; The 2nd, can keep the continuity of highly-efficient processing effectively, can often not occur because of changing the phenomenon that electrode interrupts processing.
3,, need to adopt the interior type of cooling towards liquid, outwash liquid or the combination of interior outwash liquid phase in order to keep the continuity and the stability of discharging milling highly-efficient processing under the big electric current prerequisite.Wherein, in realizing towards liquid cooling but mode just require long electrode is made into the hollow type structure, with in providing towards but passage of liquid cooling.This passage can be single hole, diplopore or loose structure, even can adopt looping pit.
4, in order to obtain suface processing quality preferably, simple hollow long electrode relative workpiece in discharge processing produces displacement simultaneously, around self axis rotation.From actual effect, it is effective that the electrode rotation combines with above method.Especially when electrode was provided with the chip removal tangent plane, its effect was more outstanding.
Operation principle of the present invention is: add man-hour at efficient electric spark milling, utilize simple hollow long electrode removal excess stock in layer, up to the dimensional requirement that reaches processing.To the continuous Continuous Compensation of the simple long electrode of export license utilization, with realize efficiently, continuously, optimal process resultant effect accurately.
Because the technique scheme utilization, the present invention compared with prior art has following advantage:
1, the present invention adopts simple hollow long electrode to carry out efficient discharging milling processing, because export license is bigger, need on length, constantly compensate, the traditional habit way all adopted short simple electrode to carry out in the past, need often to change electrode, operating efficiency is descended, poor practicability, carry out efficient electric spark milling processing and adopt long simple electrode to add the guider guiding, just can significantly reduce electrode and change number of times, realize automatically processing continuously, may improve working (machining) efficiency greatly like this, therefore this improvement has very strong practicality, also helps numerical controlization.
2, general spark-erosion sinking processing need be used the complicated electrode consistent with the processing cavity shape, and such electrode manufacturing is difficulty relatively, the cost height, and the present invention adopts simple electrode to process, and electrode is simply easily manufactured, and cost is lower, and is practical.
3, the hollow structure of electrode can be realized internal-filling liquid, substantially improves the cooling and the chip removal condition of machining area, makes processing can adopt the power supply of macro-energy to carry out highly-efficient processing smoothly.
4, long electrode is also used in traditional in the past electric spark small hole processing, yet efficient discharging milling electric machining process and electric spark-erosion perforation technology have very big difference from process, requirement and purpose are also inequality, therefore, the present invention adopts simple long electrode to carry out the technical conceive of efficient discharging milling processing, obviously not simply electrode length to be extended, but at special material, adopt the long electrode of simple hollow, the efficient discharging milling processing that utilization milling manufacturing process is carried out, therefore have novelty and technological progress significantly, especially processing has great practical significance for efficient discharging milling.
The specific embodiment
Below in conjunction with embodiment the present invention is further described:
Embodiment: the simple long electrode of a kind of employing carries out efficient numerically controlled milling discharge method for processing, and work piece is the engine turbine blade, and material is a high temperature heat-resisting, mills out the space curved surface of turbo blade by efficient discharge layered milling method for processing.The high-efficient milling of this roughing type discharge processing adopts draw ratio at the simple electrode 80: 1 or more on the Numeric Control Technology basis, adds the guider guiding, and the workpiece layered milling that discharges is shaped and processes.Described simple electrode is bar-shaped cylinder electrode, length is 1000mm, and diameter is Φ 6mm, and the kernel of section of simple long electrode is provided with single hole, in being used for, this single hole towards liquid cooling but, simultaneously machining area is cooled off chip removal towards liquid and the combination of outwash liquid dual mode in adopting during work.Electrode in discharging milling around the rotation of self axis.In discharge layered milling process, carry out online compensation in addition to the export license of simple long electrode.
Claims (6)
1, a kind of employing hollow electrode carries out milling discharge method for processing, it is characterized in that: on the Numeric Control Technology basis, adopt hollow electrode to add the guider guiding, workpiece is carried out discharging milling shaping processing, wherein said hollow electrode is:
(1), the electrode sections profile formed through one or many cutting vertically by cylinder or on the cylinder basis, and electrode axis to the cross sectional shape of diverse location with big or small identical;
(2), electrode is that hollow can be interior towards the liquid structure;
(3), the draw ratio of electrode is more than 30: 1.
2, milling discharge method for processing according to claim 1, it is characterized in that: the draw ratio of described electrode is more than 50: 1.
3, milling discharge method for processing according to claim 2, it is characterized in that: the draw ratio of described electrode is more than 80: 1.
4, milling discharge method for processing according to claim 1, it is characterized in that: described hollow electrode is single hole or diplopore or porous or looping pit structure.
5, milling discharge method for processing according to claim 1 is characterized in that: described electrode can be around self axis rotation in discharge processing.
6, milling according to claim 1 discharge method for processing is characterized in that: make up towards liquid, outwash liquid or both in the type of cooling of described electrode in discharging milling processing can adopt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02137873 CN1270861C (en) | 2002-06-27 | 2002-06-27 | Method for efficient discharge milling with hollow long electrode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02137873 CN1270861C (en) | 2002-06-27 | 2002-06-27 | Method for efficient discharge milling with hollow long electrode |
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| CN1397399A CN1397399A (en) | 2003-02-19 |
| CN1270861C true CN1270861C (en) | 2006-08-23 |
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| CN 02137873 Expired - Fee Related CN1270861C (en) | 2002-06-27 | 2002-06-27 | Method for efficient discharge milling with hollow long electrode |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102284752A (en) * | 2011-07-20 | 2011-12-21 | 哈尔滨工业大学 | Electrode of particle reinforced aluminum matrix composite material electric spark milling tool |
| CN102610348B (en) * | 2012-04-11 | 2015-04-29 | 安泰科技股份有限公司 | Iron-based nanocrystalline soft magnetic alloy material and preparing method thereof |
| CN103786005A (en) * | 2012-10-31 | 2014-05-14 | 通用电气公司 | Workpiece machining method and electric spark machining device |
| CN104439572B (en) * | 2013-09-13 | 2017-09-12 | 通用电气公司 | Galvano-cautery system of processing and method |
| CN103954664A (en) * | 2014-04-10 | 2014-07-30 | 深圳普门科技有限公司 | Electrode disk, preparation method thereof and electrochemical flow cell based on same |
| CN104646776B (en) * | 2014-12-31 | 2017-01-11 | 清华大学 | Welding preparation process for nested hollow electrode for micro-electrolytic machining |
| CN105269092A (en) * | 2015-11-16 | 2016-01-27 | 四川明日宇航工业有限责任公司 | Electric milling electrode |
| 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 |
| CN110508886B (en) * | 2019-08-26 | 2020-09-04 | 哈尔滨工业大学 | Efficient discharge milling method utilizing tube electrode shoulder discharge and electrode loss compensation method |
| CN112846426B (en) * | 2020-12-31 | 2023-11-28 | 苏州电加工机床研究所有限公司 | Precise milling method of numerical control electric spark machine tool |
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