CN105643032B - A kind of processing method of the high-precision small square hole of revolving parts radial direction - Google Patents
A kind of processing method of the high-precision small square hole of revolving parts radial direction Download PDFInfo
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- CN105643032B CN105643032B CN201410649557.8A CN201410649557A CN105643032B CN 105643032 B CN105643032 B CN 105643032B CN 201410649557 A CN201410649557 A CN 201410649557A CN 105643032 B CN105643032 B CN 105643032B
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- square hole
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Abstract
The invention discloses a kind of processing method of the high-precision small square hole of revolving parts radial direction, the range of work is 0.3~3.0mm, and processing thickness is less than 1.5mm, and root Rmax0.08, the radial direction coplane degree of relative opening is within 0.01mm.The method is on the basis of traditional Electric Discharge Machining small square hole, using EROWA fixtures and homemade arc-spark stand, the roughing small square hole on spark-erosion machine tool, gives finishing reserved margin；And the characteristics of utilizing EROWA fixtures and low-speed WEDM workpieces processing and advantage, low-speed WEDM is added in the fine-processing technique of small square hole so as to reach purpose of the radial direction coplane degree of relative opening in 0.01mm, and the regular shape of small square hole.The small square hole processing method of the present invention is compared with traditional diamond-making technique, efficiency high, steady quality, and qualification rate reaches more than 99%.
Description
Technical field：
The present invention relates to field of machining, more particularly to a kind of high-precision small square hole processing method, the range of work 0.3
~3.0mm, processing thickness are less than 1.5mm, and root Rmax0.08mm, the radial direction coplane degree of relative opening is within 0.01mm.
Background technology：
The precision of valve cover parts has a significant impact to the performance tool of aeronautical product, and sleeve throttling small square hole is even more to influence liquid
One of key characteristic that pressure parts accurately control.Throttling square-hole due to required precision itself it is high the characteristics of, traditional machinery adds
Work mode is difficult to complete.For electrical discharge machining because equipment is simple, precision is high, has obtained extensive attention the advantages that efficiency high and should
With.A variety of valve bush part throttling square-holes are in the range of 0.3~3.0mm in aeronautical product, and radial direction coplane degree is in 0.01mm, root
Rmax0.08mm,.The machining process route of usual valve bush part throttle orifice is to utilize Roughing and fine machining electrode on spark-erosion machine tool
The Roughing and fine machining of small square hole is carried out, not only processing efficiency is low, and electrode fabrication process is complicated, usage amount is big, and square hole shape is not
Rule, dimensional uniformity is poor, and qualification rate is low.
The content of the invention
The purpose of the present invention is the deficiency for existing method, using a kind of essence of high-precision small square hole on revolving parts
Processing technology, make radial direction coplane degree≤0.01mm, the root Rmax0.08mm of small square hole, and it is high in machining efficiency, quality is steady
It is fixed.
The technical solution adopted by the present invention is a kind of processing method of revolving parts radially high-precision small square hole, its feature
It is, the processing high-precision small square hole of radial direction comprises the following steps that on revolving parts：
Step 1, the cylindrical clamping benchmark processing of revolving parts：Roughing revolving parts are cylindrical, and EROWA fixtures are filled
The excircle part of folder carries out grinding；
Step 2, electrode machining：Electrode blank is arranged on arc-spark stand, using low-speed WEDM machine-shaping electrode,
Bilateral small 0.15~0.30mm of the size of electrode sections than small square hole size；
Step 3, revolving parts are installed：The cylindrical benchmark of revolving parts being ground using EROWA clamps；
Step 4, electric spark roughing small square hole：Fixture with revolving parts is arranged on to the main shaft of spark-erosion machine tool
On, on revolving parts, using electrode roughing small square hole described in grouping step 2, stay 0.10~0.25mm of allowance；
Step 5, low-speed WEDM finishing small square hole：Fixture with revolving parts is arranged on into silk thread of being careful to cut
On the C axles of cutting mill bed, finishing small square hole is carried out.
Beneficial effects of the present invention be the method using traditional electrical discharge machining high accuracy small square hole, it is necessary to it is substantial amounts of thick,
Finishing electrode, electrode size and installation accuracy it is high (dimensional accuracy be ± 0.005mm, electrode spacing value tolerance be ±
0.01mm), the complex process of machined electrode, process-cycle length, it is big to install the difficulty of electrode, and processing efficiency is low, and part closes
Lattice rate is low.Low-speed WEDM process technology has very strong practical value, in numerous works as a kind of special processing technology
Industry production field plays an important role, and its process means is that fabrication techniques can not substitute in many cases.This
Invention in the finishing of high-precision small square hole using low-speed WEDM ensure radial direction coplane degree, electrical discharge machining be for for
Low-speed WEDM processes basic hole so that electrode and the tolerance of installation are relaxed, and simplify the processing technology of electrode, installation effect
Rate is improved more than five times, has saved electrode production cost, and processing efficiency improves three to four-fold, steady quality.
The present invention ensure that part Roughing and fine machining using the high advantage with shaped electrode of EROWA fixtures repetitive positioning accuracy
Positional precision after switching on different lathes, finish small square hole for slow feeding linear cutting bed and provide good pre- hole；
Using the characteristics of slow feeding linear cutting bed and advantage, so as to reach the purpose within small square hole radial direction coplane degree 0.01mm；Electricity
Spark is used for processing pre- hole for smart line, reduces electrode required precision, saves electrode production cost；Wire electrode is in cutting process
Lossless, accurate to dimension is high, regular shape, and root R uniformity is good；Two relative openings of time processing, ensure that holes
Both sides coplane degree.
Brief description of the drawings
Fig. 1 is the processing method flow chart of the present invention；
Embodiment
In order to preferably implement the present invention, the present invention is elaborated with reference to Figure of description, refers to explanation
Book accompanying drawing 1.
Using an external diameter asInternal diameter isHeight L：Exemplified by 90mm workpiece, it is desirable to16 1.5 ± 0.02 × 0.3+0.03mm of prescription hole (uniform at circumference two, a row 4), corresponding four holes are processed on circumference
Four side coplane degrees be 0.01mm, illustrate the embodiment of this patent：
1st, it is cylindrical by it is outer mill processing dimension toInternal diameter by wire cutting, the top gem of a girdle-pendant grind processing dimension to
2nd, electrode machining needs following steps：
Electrode material：Copper-tungsten
1) electrode blank is processed：40 × 5 × 2mm bar shaped is processed as with wire cutting and plain grinding.
2) by electrode blank clamping in arc-spark stand, held out against with screw.
3) the centering function of slow wire feeding lathe is utilized, determines the center on electrode both sides, this center is the working origin of electrode,
Parameter setting is as follows：
Lathe：Switzerland's Archie summer Mil ROBFIL 2030SI
Wire electrode：Zinc-plated copper wire
Wire travelling speed：6.8m/min
Thread tension：0.48N
Irrigation pressure：0
Pulse width：3.0μs
Pulse spacing：6.6μs
Servo-drive system mean baseline voltage：-80V
Electrode machining size arrives：1.2±0.03×0.16±0.03
3rd, electric spark roughing small square hole, for for finishing pre- hole is provided, stay 0.10~0.25mm of allowance, it is necessary to
Following steps：
1) install：It is cylindrical with EROWA collet Clamp blocks, and be installed on the main shaft of spark-erosion machine tool；After processing
Electrode and arc-spark stand be installed along with platen.
2) the centering function of spark-erosion machine tool is utilized, determines the radial center of part and axial zero point, this benchmark is workpiece
Working origin, parameter setting is as follows：
Lathe：Switzerland's Archie summer Mil ROBFORM 35P
Electrode：Copper-tungsten
Pulse spacing:10μs
Electrode cutter lifting Backoff time:2s
Process time between cutter lifting twice:5s
3) after machining, part is taken off together with EROWA collets.
Small square hole processing dimension arrives：1.25±0.03×0.2±0.03
4th, low-speed WEDM processing needs following steps：
1) part with EROWA collets is arranged on the A axles of low-speed WEDM, with dial test indicator centering
The cylindrical bounce of part is within 0.01mm.
2) the centering function of slow wire feeding lathe is utilized, determines workpiece radial center and axial zero point, this benchmark is workpiece
Working origin, parameter setting are as follows：
Lathe：Switzerland's Archie summer Mil ROBFIL 2030SI
Wire electrode：Zinc-plated copper wire
Wire travelling speed：6.8m/min
Thread tension：0.48N
Irrigation pressure：0
Pulse width：3.0μs
Pulse spacing：6.6μs
Servo-drive system mean baseline voltage：-80V
Small square hole is worked into 1.5 ± 0.02 × 0.3+0.03 of size, the four side coplane degrees in corresponding four holes are 0.01mm, side
Hole shape rule.
The processing method that the present invention is combined in the processing of high-precision small square hole using electric spark and low-speed WEDM, is used
Electric spark provides good basic hole for follow-up low-speed WEDM, the processing efficiency of high-precision small square hole is improved three to four
Times, not only steady quality, and reduce processing cost.
Claims (1)
1. the processing method of the high-precision small square hole of a kind of revolving parts radial direction, it is characterised in that processed on revolving parts
Radially high-precision small square hole comprises the following steps that：
Step 1, the cylindrical clamping benchmark processing of revolving parts：Roughing revolving parts are cylindrical, to EROWA fixture clampings
Excircle part carries out grinding；
Step 2, electrode machining：Electrode blank is arranged on arc-spark stand, utilizes low-speed WEDM machine-shaping electrode, electrode
Bilateral small 0.15~0.30mm of the size in section than small square hole size；
Step 3, revolving parts are installed：The cylindrical benchmark of revolving parts being ground using EROWA clamps；
Step 4, electric spark roughing small square hole：Fixture with revolving parts is arranged on the main shaft of spark-erosion machine tool,
On revolving parts, using electrode roughing small square hole described in grouping step 2,0.10~0.25mm of allowance is stayed；
Step 5, low-speed WEDM finishing small square hole：Fixture with revolving parts is arranged on slow feeding linear cutting
On the C axles of bed, finishing small square hole is carried out.
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| CN201410649557.8A CN105643032B (en) | 2014-11-14 | 2014-11-14 | A kind of processing method of the high-precision small square hole of revolving parts radial direction |
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| CN201410649557.8A CN105643032B (en) | 2014-11-14 | 2014-11-14 | A kind of processing method of the high-precision small square hole of revolving parts radial direction |
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| CN105643032A CN105643032A (en) | 2016-06-08 |
| CN105643032B true CN105643032B (en) | 2018-04-10 |
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| CN106392212A (en) * | 2016-11-26 | 2017-02-15 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for electric machining of special-shaped groove |
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| CN108161708A (en) * | 2017-12-20 | 2018-06-15 | 中国航发长春控制科技有限公司 | A kind of precision square hole milling tool and method |
| CN110064804B (en) * | 2019-04-30 | 2020-05-15 | 中国航发南方工业有限公司 | Machining method of small hole with spatial angle of aviation part |
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| CN113829012B (en) * | 2021-09-29 | 2022-12-06 | 成都光明光电有限责任公司 | Glass discharge tube and method for producing the same |
| CN114952306A (en) * | 2022-06-21 | 2022-08-30 | 河南省优普密封科技有限公司 | Machining process for 0.25mm glue inlet hole of liquid mold |
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| JP4489276B2 (en) * | 2000-10-25 | 2010-06-23 | 本田技研工業株式会社 | Chip oil hole forming method and wire electric discharge machine used therefor |
| CN101664834A (en) * | 2009-09-29 | 2010-03-10 | 西部金属材料股份有限公司 | Method for cutting tungsten nickel iron alloy device with slow speed wire |
| JP5396613B2 (en) * | 2009-09-30 | 2014-01-22 | 伊藤 幸男 | Composite work machine for disk work and composite work machine for disk work |
| CN102357693B (en) * | 2011-09-08 | 2013-04-10 | 中国航空工业第六一八研究所 | Method for machining high-precision deep hole |
| CN102825349B (en) * | 2012-08-20 | 2015-02-11 | 四川科思精密模具有限公司 | Method for processing precise small dies with electric spark multipoint electrode |
| CN103737134A (en) * | 2013-11-19 | 2014-04-23 | 无锡高晟成型科技有限公司 | Electrode reference measurement method |
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