CN105643032A - Machining method for radial high-precision small square holes of rotary part - Google Patents
Machining method for radial high-precision small square holes of rotary part Download PDFInfo
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- CN105643032A CN105643032A CN201410649557.8A CN201410649557A CN105643032A CN 105643032 A CN105643032 A CN 105643032A CN 201410649557 A CN201410649557 A CN 201410649557A CN 105643032 A CN105643032 A CN 105643032A
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Abstract
The invention discloses a machining method for radial high-precision small square holes of a rotary part. The machining range is 0.3-3.0 mm, the machining thickness is less than 1.5 mm, the root Rmax is 0.08, and the radial coplanarity degree of the opposite holes is within 0.01 mm. According to the machining method for the radial high-precision small square holes of the rotary part, on the basis of machining the small square holes through traditional electric spark forming, the small square holes are machined roughly on an electric discharge machining machine tool through an EROWA fixture and a homemade electrode stand to reserve margins for finish machining; by using the characteristics and advantages of machining the workpiece through the EROWA fixture and slow speed wire cutting, slow speed wire cutting is added into the finish machining process for the small square holes, accordingly, the purpose that the radial coplanarity degree of the opposite holes is within 0.01 mm is achieved, and the small square holes are regular in shape. Compared with a traditional machining method, the machining method for the radial high-precision small square holes of the rotary part is high in efficiency and stable in quality, and the qualified rate reaches 99% or higher.
Description
Technical field:
The present invention relates to field of machining, particularly relate to a kind of high accuracy small square hole processing method, the range of work is 0.3��3.0mm, and processing thickness is less than 1.5mm, root Rmax0.08mm, and the radial direction coplane degree of relative opening is within 0.01mm.
Background technology:
The performance of aeronautical product is had and has a significant impact by the precision of valve cover parts, and sleeve throttling small square hole affects one of key characteristic that hydraulic components accurately controls especially. Throttling square-hole is high due to required precision own, and traditional machining mode has been difficult to. Spark machined is simple due to equipment, and precision is high, and efficiency advantages of higher obtains to be paid attention to and application widely. In aeronautical product, multiple valve bush part throttling square-hole is within the scope of 0.3��3.0mm, and radially coplane degree is at 0.01mm, root Rmax0.08mm. The machining process route of usual valve bush part throttle orifice is the Roughing and fine machining utilizing Roughing and fine machining electrode to carry out small square hole on spark-erosion machine tool, not only working (machining) efficiency is low, and electrode fabrication process is complicated, make consumption big, and square hole is in irregular shape, dimensional uniformity is poor, and qualification rate is low.
Summary of the invention
The purpose of the present invention is for now methodical deficiency, adopts a kind of fine-processing technique method of high accuracy small square hole on revolving parts, makes radial direction coplane degree��0.01mm, the root Rmax0.08mm of small square hole, and working (machining) efficiency is high, steady quality.
The technical solution used in the present invention is the processing method of a kind of revolving parts radially high accuracy small square hole, it is characterised in that on revolving parts, processing radially high accuracy small square hole specifically comprises the following steps that
Step 1, the cylindrical clamping benchmark processing of revolving parts: roughing revolving parts cylindrical, the excircle part of EROWA fixture clamping is carried out grinding;
Step 2, electrode machining: electrode blank is arranged on arc-spark stand, utilize low-speed WEDM machine-shaping electrode, the size of electrode sections is than the bilateral little 0.15��0.30mm of small square hole size;
Step 3, revolving parts is installed: use the revolving parts cylindrical benchmark of EROWA clamp grinding;
Step 4, electric spark roughing small square hole: the fixture with revolving parts is arranged on the main shaft of spark-erosion machine tool, on revolving parts, use electrode roughing small square hole described in grouping step 2, stay allowance 0.10��0.25mm;
Step 5, low-speed WEDM polish small square hole: the fixture with revolving parts is arranged on the C axle of slow feeding linear cutting bed, carries out polish small square hole.
Beneficial effects of the present invention is the method adopting tradition spark machined high accuracy small square hole, need substantial amounts of Roughing and fine machining electrode, electrode size and installation accuracy high (dimensional accuracy be �� 0.005mm, electrode spacing value tolerance be �� 0.01mm), the complex process of machined electrode, process-cycle is long, the difficulty installing electrode is big, and working (machining) efficiency is low, and part qualification rate is low. Low-speed WEDM process technology, as a kind of special processing technology, has very strong practical value, plays an important role at numerous field of industrial productions, and its process means is that fabrication techniques cannot replace in many cases. The present invention adopts low-speed WEDM to ensure radially coplane degree in the polish of high accuracy small square hole, spark machined is used to as hole, low-speed WEDM processing basis, the tolerance making electrode and installation is relaxed, simplify the processing technique of electrode, installation effectiveness improves more than five times, save electrode production cost, and working (machining) efficiency has improve three to four-fold, steady quality.
The present invention utilizes EROWA fixture repetitive positioning accuracy high and the advantage of shaped electrode, it is ensured that part Roughing and fine machining positional precision after switching on different lathes, provides good pre-hole for slow feeding linear cutting bed polish small square hole; Utilize feature and the advantage of slow feeding linear cutting bed, thus reaching the purpose within small square hole radially coplane degree 0.01mm; Electric spark is used for processing pre-hole for essence line, reduces electrode required precision, saves electrode production cost; Wire electrode is lossless in cutting process, and accurate to dimension is high, regular shape, and root R concordance is good; Two relative openings of time processing, it is ensured that the both sides coplane degree of holes.
Accompanying drawing explanation
Fig. 1 is the processing method flow chart of the present invention;
Detailed description of the invention
In order to better implement the present invention, below in conjunction with Figure of description, the present invention is elaborated, refer to Figure of description 1.
With an external diameter forInternal diameter isThe workpiece of height L:90mm is example, it is desirable toProcessing 16 place square hole 1.5 �� 0.02 �� 0.3+0.03mm (circumference two place is uniform, a row 4) on circumference, the four limit coplane degrees in corresponding four holes are 0.01mm, set forth the detailed description of the invention of this patent:
1, cylindrical by outer mill processing dimension toInternal diameter by line cut, the top gem of a girdle-pendant grind processing dimension to
2, electrode machining needs following step:
Electrode material: copper-tungsten
1) electrode blank processing: be processed as the bar shaped of 40 �� 5 �� 2mm with line cutting and plain grinding.
2) by electrode blank clamping in arc-spark stand, hold out against with screw.
3) utilizing the centering function of slow wire feeding lathe, it is determined that the center on electrode both sides, this center is the working origin of electrode, and parameter setting is as follows:
Lathe: Switzerland's Archie summer Mil ROBFIL2030SI
Wire electrode:Zinc-plated copper wire
Wire travelling speed: 6.8m/min
Thread tension: 0.48N
Irrigation pressure: 0
Pulse width: 3.0 �� s
Pulse spacing: 6.6 �� s
Servosystem mean baseline voltage :-80V
Electrode machining size arrives: 1.2 �� 0.03 �� 0.16 �� 0.03
3, electric spark roughing small square hole, is used for providing pre-hole for polish, stays allowance 0.10��0.25mm, it is necessary to following step:
1) install: use EROWA collet Clamp blocks cylindrical, and be installed on the main shaft of spark-erosion machine tool;Electrode after processing and arc-spark stand are installed along with on platen.
2) utilizing the centering function of spark-erosion machine tool, it is determined that the radial center of part and axial zero point, this benchmark is the working origin of workpiece, and parameter setting is as follows:
Lathe: Switzerland's Archie summer Mil ROBFORM35P
Electrode: copper-tungsten
Pulse spacing: 10 �� s
Electrode cutter lifting Backoff time: 2s
Process time between twice cutter lifting: 5s
3), after machining, part is taken off together with EROWA collet.
Small square hole processing dimension arrives: 1.25 �� 0.03 �� 0.2 �� 0.03
4, low-speed WEDM processing needs following step:
1) part with EROWA collet is arranged on the A axle of low-speed WEDM, beats within 0.01mm with dial test indicator centering part outer.
2) utilizing the centering function of slow wire feeding lathe, it is determined that workpiece radial center and axial zero point, this benchmark is the working origin of workpiece, and parameter setting is as follows:
Lathe: Switzerland's Archie summer Mil ROBFIL2030SI
Wire electrode:Zinc-plated copper wire
Wire travelling speed: 6.8m/min
Thread tension: 0.48N
Irrigation pressure: 0
Pulse width: 3.0 �� s
Pulse spacing: 6.6 �� s
Servosystem mean baseline voltage :-80V
Small square hole is worked into size 1.5 �� 0.02 �� 0.3+0.03, the four limit coplane degrees in corresponding four holes are 0.01mm, square hole regular shape.
The present invention adopts the processing method that electric spark and low-speed WEDM combine in the processing of high accuracy small square hole, good basic hole is provided for follow-up low-speed WEDM with electric spark, the working (machining) efficiency making high accuracy small square hole improves three-to-four-fold, not only steady quality, and reduce processing cost.
Claims (1)
1. the processing method of a revolving parts radially high accuracy small square hole, it is characterised in that processing radially high accuracy small square hole specifically comprises the following steps that on revolving parts
Step 1, the cylindrical clamping benchmark processing of revolving parts: roughing revolving parts cylindrical, the excircle part of EROWA fixture clamping is carried out grinding;
Step 2, electrode machining: electrode blank is arranged on arc-spark stand, utilize low-speed WEDM machine-shaping electrode, the size of electrode sections is than the bilateral little 0.15��0.30mm of small square hole size;
Step 3, revolving parts is installed: use the revolving parts cylindrical benchmark of EROWA clamp grinding;
Step 4, electric spark roughing small square hole: the fixture with revolving parts is arranged on the main shaft of spark-erosion machine tool, on revolving parts, use electrode roughing small square hole described in grouping step 2, stay allowance 0.10��0.25mm;
Step 5, low-speed WEDM polish small square hole: the fixture with revolving parts is arranged on the C axle of slow feeding linear cutting bed, carries out polish small square hole.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 true CN105643032A (en) | 2016-06-08 |
| CN105643032B CN105643032B (en) | 2018-04-10 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106444645A (en) * | 2016-08-17 | 2017-02-22 | 义乌朝晖智能科技有限公司 | Multi-axis linkage motion control method based on embedded cutting bed controller |
| CN106944684A (en) * | 2017-04-17 | 2017-07-14 | 中国工程物理研究院激光聚变研究中心 | A kind of micro rod side surface platform processing method |
| 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 |
| CN110064804A (en) * | 2019-04-30 | 2019-07-30 | 中国航发南方工业有限公司 | The processing method of aviation components space angle aperture |
| CN110405414A (en) * | 2019-07-04 | 2019-11-05 | 厦门捷昕精密科技股份有限公司 | Solve tubular configured joint die joint flash mold processing technology |
| CN112894040A (en) * | 2021-01-26 | 2021-06-04 | 中国航发贵州黎阳航空动力有限公司 | Annular profile air film hole machining method |
| CN113829012A (en) * | 2021-09-29 | 2021-12-24 | 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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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106444645A (en) * | 2016-08-17 | 2017-02-22 | 义乌朝晖智能科技有限公司 | Multi-axis linkage motion control method based on embedded cutting bed controller |
| 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 |
| CN106944684A (en) * | 2017-04-17 | 2017-07-14 | 中国工程物理研究院激光聚变研究中心 | A kind of micro rod side surface platform processing method |
| 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 |
| CN110064804A (en) * | 2019-04-30 | 2019-07-30 | 中国航发南方工业有限公司 | The processing method of aviation components space angle aperture |
| CN110405414A (en) * | 2019-07-04 | 2019-11-05 | 厦门捷昕精密科技股份有限公司 | Solve tubular configured joint die joint flash mold processing technology |
| CN112894040A (en) * | 2021-01-26 | 2021-06-04 | 中国航发贵州黎阳航空动力有限公司 | Annular profile air film hole machining method |
| CN112894040B (en) * | 2021-01-26 | 2023-02-28 | 中国航发贵州黎阳航空动力有限公司 | Annular profile air film hole machining method |
| CN113829012A (en) * | 2021-09-29 | 2021-12-24 | 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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| CN105643032B (en) | 2018-04-10 |
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