CN101829888A - Method for machining encircling hole with meridian plane group nozzle - Google Patents
Method for machining encircling hole with meridian plane group nozzle Download PDFInfo
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- CN101829888A CN101829888A CN 201010148008 CN201010148008A CN101829888A CN 101829888 A CN101829888 A CN 101829888A CN 201010148008 CN201010148008 CN 201010148008 CN 201010148008 A CN201010148008 A CN 201010148008A CN 101829888 A CN101829888 A CN 101829888A
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- nozzle sets
- meridian plane
- belt type
- shroud
- surrounding belt
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Abstract
The invention discloses a method for machining an encircling hole with a meridian plane group nozzle, which mainly comprises the following steps of: fixing the group nozzle on a rotatable locating ring with index locating holes, cutting the encircling hole through a wire cutting machine, and cutting the next encircling hole according to the pitch rotate locating ring of the encircling hole after each one encircling hole is cut. The method for machining the encircling hole with the meridian plane group nozzle adopts the wire cutting machine to cut the encircling holes and uses index locating holes on the locating ring for index location so as to ensure the machining accuracy. The method is convenient to realize, ensures the reliability and rationality in technology,g greatly improves the production levels of steam turbine nozzles, reduces the manufacturing cost of steam turbine and improves the work efficiency.
Description
Technical field
The present invention relates to a kind of nozzle sets surrounding belt type hole forming method, particularly a kind of processing method that is provided with the nozzle sets surrounding belt type hole of band meridian plane.
Background technology
Nozzle sets is a common components on the steam turbine, generally all be provided with the surrounding belt type hole on the nozzle sets shroud, at present the processing method in nozzle of steam turbine group surrounding belt type hole adopts graphite electrode electric pulse method or Laser cutting method and CNC milling machine to carry out method such as milling to carry out more.But development along with steam turbine technology, large-size steam turbine nozzle sets shroud adopts band meridian plane nozzle sets technology more, this kind band meridian plane nozzle sets structure as shown in Figure 1, nozzle sets shroud 1 is one columnar structured, the curved surface that the end that circle is thicker on the nozzle sets shroud 1 forms is band meridian plane 2, this band meridian plane nozzle sets shroud need be on whole astragal meridian plane 2 be processed four groups of surrounding belt type holes 3 respectively adding man-hour, the quantity in these surrounding belt type holes is many, curvature changes greatly, and thickness is thicker, and surrounding belt type hole forming method commonly used at present can not be suitable for the processing in this band meridian plane nozzle sets surrounding belt type hole.Adopt graphite electrode electric pulse method can not swash to wear that distribution is so intensive, curvature variation nozzle type hole greatly like this.Because band meridian plane nozzle sets surrounding belt type hole thickness generally will all surpass 12mm, and the Laser cutting method only can be cut at the following thickness of 12mm, so the Laser cutting method is processed also powerless to the surrounding belt type hole of being with the meridian plane nozzle sets.As adopt CNC milling machine to carry out milling surrounding belt type hole, because surrounding belt type hole lagging edge R 1.2mm only, milling cutter diameter is too little, so can not realize the Milling Process in this surrounding belt type hole.
Summary of the invention
At above-mentioned the deficiencies in the prior art, the technical problem to be solved in the present invention provides the processing method in a kind of machining accuracy height, practical band meridian plane nozzle sets surrounding belt type hole.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of band meridian plane nozzle sets surrounding belt type hole forming method, it comprises the steps:
(a) adopt the band meridian plane curved surface of Digit Control Machine Tool turning working nozzle group shroud, and on the nozzle sets shroud, process wire hole in advance;
(b) make a clamping tool according to the nozzle sets shroud that processes, a rotating centring ring is set on this clamping tool, a circle calibration locating hole is set on this centring ring;
(c) be fixedly connected on the described centring ring the nozzle sets shroud that processes is coaxial, described clamping tool is fixed on the wire cutting machine tool;
(d) molybdenum filament of wire cutting machine tool is passed on the nozzle sets shroud and the corresponding wire hole in molybdenum filament threading position, by the surrounding belt type hole at this place of wire cutting machine tool processing cutting;
(e) according to the rotation of the pitch between adjacent two surrounding belt type holes centring ring, make and adopt the calibration locating hole to position, repeating step (d) all surrounding belt type holes on nozzle sets band meridian plane machine then.
Preferably, the band meridian plane curved surface of Digit Control Machine Tool turning working nozzle group shroud is handled through a roughing and a fine finishining and a de-stress respectively in step (a).
Preferably, described centring ring is provided with a location groove, and described nozzle sets shroud is fixedly connected in this detent.
Preferably, to test with type hole sample post after each surrounding belt type hole machines.
Technique scheme has following beneficial effect: this band meridian plane nozzle sets surrounding belt type hole forming method adopts wire cutting machine tool that the surrounding belt type hole is cut, adopt the calibration locating hole on the centring ring to carry out the calibration location, can guarantee the precision of processing like this and be convenient to realize, technologic reliability and reasonability have been guaranteed, improved the production technique of nozzle of steam turbine group greatly, reduce the manufacturing cost of steam turbine, improved operating efficiency.
Description of drawings
Fig. 1 is the structural representation of band meridian plane nozzle sets.
Fig. 2 is the flow chart of embodiment of the invention band meridian plane nozzle sets surrounding belt type hole forming method.
The specific embodiment
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described in detail.
As shown in Figure 2, this band meridian plane nozzle sets surrounding belt type hole forming method, it comprises the steps:
(a) the band meridian plane curved surface on the employing Digit Control Machine Tool turning working nozzle group shroud, band meridian plane curved surface on the Digit Control Machine Tool turning working nozzle group shroud needs respectively through a roughing, a fine finishining and a de-stress are handled, its effect is the machining deformation amount that prevents the whole circle of book wall part, in turning process, the turning chuck end is put sufficient surplus, one fix on processing dimensions such as accurate each curved surface of all accurate cars and gradient after, cut accurate whole circle width dimensions again, the machining accuracy and the dimensional requirement of nozzle sets shroud meridian plane molding surface size can be guaranteed like this, also wire hole will be on the nozzle sets shroud, processed in advance after the meridian plane Machining of Curved Surface is finished;
(b) make a clamping tool according to the nozzle sets shroud that processes, a rotating centring ring is set on this clamping tool, on this centring ring, bore a circle calibration locating hole, and a location groove is set on centring ring;
(c) with in the coaxial detent that is fixedly connected on centring ring of the nozzle sets shroud that processes, and clamping tool is fixed on the wire cutting machine tool, the calibration location makes the position of a through wires hole on the nozzle sets shroud corresponding with the threading position of wire cutting machine tool molybdenum filament;
(d) molybdenum filament of wire cutting machine tool is passed on the nozzle sets shroud and the corresponding wire hole in molybdenum filament threading position, the position of wire hole perforate will be determined according to the position in surrounding belt type hole, programme to wire cutting machine tool according to the dimensional requirement in surrounding belt type hole and the position of wire hole then, by the surrounding belt type hole at this place of wire cutting machine tool processing cutting, the surrounding belt type hole machines the back with the gap in type hole sample post check nozzle sets surrounding belt type hole composite demand whether;
(e) after the assay was approved, according to the rotation of the pitch between adjacent two surrounding belt type holes centring ring, make the through wires hole of the surrounding belt type hole correspondence that the next one will process corresponding with the threading position of wire cutting machine tool molybdenum filament, and adopting the calibration locating hole to position, repeating step (d) is with all surrounding belt type holes of meridian plane all to machine on the nozzle sets shroud then.
This band meridian plane nozzle sets surrounding belt type hole forming method adopts wire cutting machine tool that the surrounding belt type hole is cut, adopt the calibration locating hole on the centring ring to carry out the calibration location, can guarantee the precision of processing like this and be convenient to realize, technologic reliability and reasonability have been guaranteed, reduce the manufacturing cost of steam turbine, improved operating efficiency.This band meridian plane nozzle sets surrounding belt type hole forming method, suitable thicknesses is thicker fully, molded lines type boring ratio is complicated and any large-scale circle class band meridian plane type hole and the demanding product manufacturing of circumference mo(u)ld top half hole pitch accuracy, this processing method is a kind of innovation in the manufacture field of band meridian plane nozzle sets surrounding belt type hole, has improved the production technique of nozzle of steam turbine group new construction widely.
More than the band meridian plane nozzle sets surrounding belt type hole forming method that the embodiment of the invention provided is described in detail; for one of ordinary skill in the art; thought according to the embodiment of the invention; part in specific embodiments and applications all can change; in sum; this description should not be construed as limitation of the present invention, and all any changes of making according to design philosophy of the present invention are all within protection scope of the present invention.
Claims (4)
1. a band meridian plane nozzle sets surrounding belt type hole forming method is characterized in that it comprises the steps:
(a) adopt the band meridian plane curved surface of Digit Control Machine Tool turning working nozzle group shroud, and on the nozzle sets shroud, process wire hole in advance;
(b) make a clamping tool according to the nozzle sets shroud that processes, a rotating centring ring is set on this clamping tool, a circle calibration locating hole is set on this centring ring;
(c) be fixedly connected on the described centring ring the nozzle sets shroud that processes is coaxial, described clamping tool is fixed on the wire cutting machine tool;
(d) molybdenum filament of wire cutting machine tool is passed on the nozzle sets shroud and the corresponding wire hole in molybdenum filament threading position, by the surrounding belt type hole at this place of wire cutting machine tool processing cutting;
(e) according to the rotation of the pitch between adjacent two surrounding belt type holes centring ring, and adopt the calibration locating hole to position, repeating step (d) is with all surrounding belt type holes of meridian plane to machine on the nozzle sets shroud then.
2. band meridian plane nozzle sets surrounding belt type hole forming method according to claim 1 is characterized in that: the band meridian plane curved surface of Digit Control Machine Tool turning working nozzle group shroud need be through a roughing and fine finishining and de-stress processing in step (a).
3. band meridian plane nozzle sets surrounding belt type hole forming method according to claim 1 is characterized in that: described centring ring is provided with a location groove, and described nozzle sets shroud is fixedly connected in this detent.
4. band meridian plane nozzle sets surrounding belt type hole forming method according to claim 1 is characterized in that: will test with type hole sample post after each surrounding belt type hole machines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010148008 CN101829888A (en) | 2010-04-15 | 2010-04-15 | Method for machining encircling hole with meridian plane group nozzle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010148008 CN101829888A (en) | 2010-04-15 | 2010-04-15 | Method for machining encircling hole with meridian plane group nozzle |
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| CN101829888A true CN101829888A (en) | 2010-09-15 |
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| CN 201010148008 Pending CN101829888A (en) | 2010-04-15 | 2010-04-15 | Method for machining encircling hole with meridian plane group nozzle |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102069352A (en) * | 2010-12-23 | 2011-05-25 | 成都四威高科技产业园有限公司 | Method for processing small nozzle |
| CN102672416A (en) * | 2012-05-31 | 2012-09-19 | 哈尔滨汽轮机厂有限责任公司 | Processing method for inner ring arc section of guide vane |
| CN102974984A (en) * | 2012-12-03 | 2013-03-20 | 哈尔滨汽轮机厂有限责任公司 | Method for machining steam turbine separation plate girdle holes by adopting numerical-control linear cutting machine |
| CN103737258A (en) * | 2013-12-20 | 2014-04-23 | 东方电气集团东方汽轮机有限公司 | Method for machining air power equipment girdle |
| CN106334846A (en) * | 2016-08-31 | 2017-01-18 | 江苏塞维斯数控科技有限公司 | Intelligent optical automatic threading system and method for medium-speed wire-cut electrical discharge machine |
| CN106624228A (en) * | 2017-01-20 | 2017-05-10 | 合肥工业大学 | Wire cutting processing method for micro segment gear |
| CN108247157A (en) * | 2017-12-26 | 2018-07-06 | 张家港华裕有色金属材料有限公司 | A kind of manufacturing method of TC4 titanium alloys seamless tube blank |
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| DE4203655A1 (en) * | 1992-02-08 | 1993-08-12 | Abb Patent Gmbh | Steam turbine flow guide ring production method - commences with U=section ring which has vanes pressed into EDM produced flange holes and web bored out to create flow passage |
| US20040096323A1 (en) * | 2002-11-20 | 2004-05-20 | General Electric Company | Turbine nozzle segment and method of repairing same |
| CN2649256Y (en) * | 2003-11-03 | 2004-10-20 | 上海汽轮机有限公司 | Clamping device for linear cutting large-sized circle hole with meridian plane |
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| CN1962145A (en) * | 2006-11-24 | 2007-05-16 | 胡梁发 | Method for processing blade form work piece and fittings dedicated therefor |
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2010
- 2010-04-15 CN CN 201010148008 patent/CN101829888A/en active Pending
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| DE4203655A1 (en) * | 1992-02-08 | 1993-08-12 | Abb Patent Gmbh | Steam turbine flow guide ring production method - commences with U=section ring which has vanes pressed into EDM produced flange holes and web bored out to create flow passage |
| US20040096323A1 (en) * | 2002-11-20 | 2004-05-20 | General Electric Company | Turbine nozzle segment and method of repairing same |
| CN2649256Y (en) * | 2003-11-03 | 2004-10-20 | 上海汽轮机有限公司 | Clamping device for linear cutting large-sized circle hole with meridian plane |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102069352A (en) * | 2010-12-23 | 2011-05-25 | 成都四威高科技产业园有限公司 | Method for processing small nozzle |
| CN102069352B (en) * | 2010-12-23 | 2012-10-10 | 成都四威高科技产业园有限公司 | Method for processing small nozzle |
| CN102672416A (en) * | 2012-05-31 | 2012-09-19 | 哈尔滨汽轮机厂有限责任公司 | Processing method for inner ring arc section of guide vane |
| CN102672416B (en) * | 2012-05-31 | 2014-09-17 | 哈尔滨汽轮机厂有限责任公司 | Processing method for inner ring arc section of guide vane |
| CN102974984A (en) * | 2012-12-03 | 2013-03-20 | 哈尔滨汽轮机厂有限责任公司 | Method for machining steam turbine separation plate girdle holes by adopting numerical-control linear cutting machine |
| CN103737258A (en) * | 2013-12-20 | 2014-04-23 | 东方电气集团东方汽轮机有限公司 | Method for machining air power equipment girdle |
| CN106334846A (en) * | 2016-08-31 | 2017-01-18 | 江苏塞维斯数控科技有限公司 | Intelligent optical automatic threading system and method for medium-speed wire-cut electrical discharge machine |
| CN106334846B (en) * | 2016-08-31 | 2018-12-28 | 江苏塞维斯数控科技有限公司 | Middle wire wire cutting machine intelligent optical automatic wire feed device and wear a method |
| CN106624228A (en) * | 2017-01-20 | 2017-05-10 | 合肥工业大学 | Wire cutting processing method for micro segment gear |
| CN108247157A (en) * | 2017-12-26 | 2018-07-06 | 张家港华裕有色金属材料有限公司 | A kind of manufacturing method of TC4 titanium alloys seamless tube blank |
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Application publication date: 20100915 |