CN102085585A - Underwater electric spark series hole shaping method - Google Patents
Underwater electric spark series hole shaping method Download PDFInfo
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- CN102085585A CN102085585A CN2009102500966A CN200910250096A CN102085585A CN 102085585 A CN102085585 A CN 102085585A CN 2009102500966 A CN2009102500966 A CN 2009102500966A CN 200910250096 A CN200910250096 A CN 200910250096A CN 102085585 A CN102085585 A CN 102085585A
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Abstract
The invention belongs to a method for processing holes by electric sparks, in particular to a high-speed efficient underwater electric spark series hole shaping method. When being used for processing series holes S1, S2......Sn (n is more than or equal to 2), the method comprises the following steps of: 1.1. processing the hole S1 for the first time; 1.2. replacing a new electrode; 2.1 processing the hole S1 for the second time; 2.2 processing the hole S2 for the first time, and adopting the electrode for processing the hole S1 for the second time; 2.3 replacing the new electrode;......n.3. replacing the electrode; (n+1).1. processing the hole Sn for the second time; and (n+1).2 finishing to process the series hole. The method has the advantages that the series hole shaping precision is guaranteed to satisfy the requirement, the radiation dose received by operating personnel can be lowered substantially, the dedicated electrode for processing the electric spark can be fully utilized, the maintenance operation time is shortened, and the efficiency is increased.
Description
Technical field
The invention belongs to the method for spark machined series of apertures, be specifically related in the high radiation environment series of apertures spark-erosion sinking method under water.
Background technology
Some equipment of nuclear power station such as in-pile component etc. are subjected to be activated behind the high dosage irradiation, if to such equipment weld, maintenance such as cutting, need in water, carry out by means of the shielding of water, to reduce the irradiation dose that the maintenance personal accepts.
These radioactivity equipment are carried out the shaping processing of thread Pilot hole, dowel hole or other shapes, adopt spark-erosion sinking under water usually.After the spark-erosion sinking frock was worked under water, because the deposition of band radioactivity powder China ink, also can become gradually had very strong radioactivity, when operations such as replacing electrode, the spark-erosion sinking frock need move on to waterborne, and the staff closely operates, and inevitably suffers heavy dose of radiation irradiation.Need the Kong Yue of processing many, the irradiation dose that operating personnel suffer is big more.
During prior art processing series of apertures, substantially be to process separately, repeat repeatedly at each hole, the final processing that realizes series of apertures, like this, electrode needs repeatedly to change, not only caused material and waste of time, also brought heavy dose of radiation hazradial bundle to operating personnel.
Summary of the invention
The purpose of this invention is to provide a kind of electric spark series of apertures manufacturing process under water fast and efficiently.
The present invention is achieved in that a kind of series of apertures of electric spark under water manufacturing process, processing comprise hole S1, S2 ... during the series of apertures of Sn (n 〉=2), comprise the steps:
Step 1.1, the processing of hole S1 first pass;
Step 1.2, more renew electrode;
Step 2.1,1 second time processing of hole S;
The electrode that hole S1 is carried out second time processing is used in step 2.2, the processing of hole S2 first pass;
Step 2.3, more renew electrode;
The rest may be inferred, up to:
Step n.1, hole Sn-1 second time processing;
Step n.2, hole Sn first pass processing, use the electrode that hole Sn-1 is carried out second time processing;
Step n.3, change electrode;
Second time processing of step (n+1) .1 hole Sn;
Step (n+1) .2 series of apertures process finishing.
The aforesaid a kind of series of apertures of electric spark under water manufacturing process, wherein, described electrode is roughing with electrode or fine finishining electrode.
Advantage of the present invention has provided at series of apertures a kind of ten minutes high-efficiency method of spark-erosion sinking under water, can guarantee that the series of apertures forming accuracy meets the demands, can reduce the irradiation dose that operating personnel suffer significantly again, can also make full use of the spark machined electrode special, shorten the maintenance activity time, raise the efficiency.Carry out series of apertures spark machined under water according to this method, except first hole (hole S1), the roughing in all the other each holes only need be changed electrode once, fine finishining also only needs to change electrode once, but realize the purpose of roughing two times, fine finishining two times, reached the effect of accurate processing.Like this,, reduced the number of times of spark machined frock, reduced operating personnel's irradiation dose simultaneously, shortened operation total time, improved efficient into and out of the water surface by reducing the number of times of changing electrode.In addition, use new electrode to carry out second time processing, guaranteed the degree of depth and the precision of processing; After machining for second time, export license is very small, can be used as the first pass processing in next hole fully, and electrode is fully utilized, and has saved cost.This method is successfully applied to the transformation reparation of Pakistani C1 project irradiation pipe holder, compares with the US Westinghouse company similar engineering, adopts this method to shorten the maintenance activity time, and greatly reduces the irradiation dose that operating personnel receive.
Description of drawings
Fig. 1 is the flow chart of electric spark series of apertures manufacturing process under water;
Fig. 2 is a series of apertures to be processed;
Fig. 3 is the support that need install;
Fig. 4 is the effect schematic diagram after the assembly of support and stent support is installed.
Wherein, S1, S2, S3, S4, S5, S6: the dowel hole on the wall of mounting bracket, series of apertures promptly to be processed; S: the dowel hole on the support is corresponding with dowel hole on the wall.
The specific embodiment
The present invention is described further below in conjunction with the drawings and specific embodiments:
As shown in Figure 1, a kind of series of apertures of electric spark under water manufacturing process, processing comprise hole S1, S2 ... during the series of apertures of Sn (n 〉=2), comprise the steps:
Step 1.1, the processing of hole S1 first pass;
Step 1.2, more renew electrode;
Step 2.1, second time processing of hole S1;
The electrode that hole S1 is carried out second time processing is used in step 2.2, the processing of hole S2 first pass;
Step 2.3, more renew electrode;
The rest may be inferred, up to:
Step n.1, hole Sn-1 second time processing;
Step n.2, hole Sn first pass processing, use the electrode that hole Sn-1 is carried out second time processing;
Step n.3, change electrode;
Second time processing of step (n+1) .1 hole Sn;
Step (n+1) .2 series of apertures process finishing.
Concrete, as shown in Figure 2, need on wall, process series of apertures S1～S6, in order to 6 supports shown in Figure 3 to be installed, each support as shown in Figure 3 is installed all needs two dowel holes; For convenience of explanation, only express one of them among Fig. 2.
During processing series of apertures S1～S6, two times roughing and two times fine finishining need be carried out with electric spark in each hole; The roughing first pass is identical with the electrode model of second time use; The fine finishining first pass is identical with the electrode model of second time use.
Concrete operations are described as follows:
At first, processing ground floor dowel hole S1: new roughing electrode is installed on the spark-erosion sinking device under water, is carried out hole S1 first pass roughing.
After hole S1 first pass roughing is finished, change electrode, carry out second time roughing of hole S1.
After S1 second time roughing in hole is finished, do not change electrode, directly carry out hole S2 first pass roughing.
After hole S2 first pass roughing is finished, change electrode, carry out second time roughing of hole S2.
After S2 second time roughing in hole is finished, do not change electrode, directly carry out hole S3 first pass roughing.
The rest may be inferred, up to:
After S5 second time roughing in hole is finished, do not change electrode, directly carry out hole S6 first pass roughing.
After hole S6 first pass roughing is finished, change electrode, carry out second time roughing of hole S6.
After S1-S6 roughing is finished, begin to carry out ground floor dowel hole S1 fine finishining.New fine finishining electrode is installed, is carried out hole S1 first pass fine finishining.
After hole S1 first pass fine finishining is finished, change electrode, carry out second time fine finishining of hole S1.
After S1 second time fine finishining in hole is finished, do not change electrode, directly carry out hole S2 first pass fine finishining.
After hole S2 first pass fine finishining is finished, change electrode, carry out second time fine finishining of hole S2.
After S2 second time fine finishining in hole is finished, do not change electrode, directly carry out hole S3 first pass fine finishining.
The rest may be inferred, up to:
After S5 second time fine finishining in hole is finished, do not change electrode, directly carry out hole S6 first pass fine finishining.
After hole S6 first pass fine finishining is finished, change electrode, carry out second time fine finishining of hole S6.
So far, finish whole S1 to S6 dowel hole roughing two times, fine finishining two times.Use 7 at roughing electrode altogether, 7 at fine finishining electrode.Change electrode each 6 times.
Fig. 4 is the effect schematic diagram after the assembly of support and stent support is installed.
Claims (4)
1. electric spark series of apertures manufacturing process under water, processing comprise hole S1, S2 ... during the series of apertures of Sn (n 〉=2), comprise the steps:
Step 1.1, the processing of hole S1 first pass;
Step 1.2, more renew electrode;
Step 2.1, second time processing of hole S1;
The electrode that hole S1 is carried out second time processing is used in step 2.2, the processing of hole S2 first pass;
Step 2.3, more renew electrode;
The rest may be inferred, up to:
Step n.1, hole Sn-1 second time processing;
Step n.2, hole Sn first pass processing, use the electrode that hole Sn-1 is carried out second time processing;
Step n.3, change electrode;
Second time processing of step (n+1) .1 hole Sn;
Step (n+1) .2 series of apertures process finishing.
2. a kind of series of apertures of electric spark under water manufacturing process as claimed in claim 1 is characterized in that: described electrode is roughing with electrode or fine finishining electrode.
3. a kind of series of apertures of electric spark under water manufacturing process as claimed in claim 2 is characterized in that: the roughing first pass is identical with the electrode model of second time use; The fine finishining first pass is identical with the electrode model of second time use.
4. a kind of series of apertures of electric spark under water manufacturing process as claimed in claim 3, it is characterized in that: concrete operations are:
At first, processing ground floor dowel hole S1: new roughing electrode is installed on the spark-erosion sinking device under water, is carried out hole S1 first pass roughing;
After hole S1 first pass roughing is finished, change electrode, carry out second time roughing of hole S1;
After S1 second time roughing in hole is finished, keep electrode, directly carry out hole S2 first pass roughing;
After hole S2 first pass roughing is finished, change electrode, carry out second time roughing of hole S2;
After S2 second time roughing in hole is finished, keep electrode, directly carry out hole S3 first pass roughing;
The rest may be inferred, up to:
After S5 second time roughing in hole is finished, keep electrode, directly carry out hole S6 first pass roughing;
After hole S6 first pass roughing is finished, change electrode, carry out second time roughing of hole S6;
After S1-S6 roughing is finished, begin to carry out ground floor dowel hole S1 fine finishining; New fine finishining electrode is installed, is carried out hole S1 first pass fine finishining;
After hole S1 first pass fine finishining is finished, change electrode, carry out second time fine finishining of hole S1;
After S1 second time fine finishining in hole is finished, keep electrode, directly carry out hole S2 first pass fine finishining;
After hole S2 first pass fine finishining is finished, change electrode, carry out second time fine finishining of hole S2;
After S2 second time fine finishining in hole is finished, keep electrode, directly carry out hole S3 first pass fine finishining;
The rest may be inferred, up to:
After S5 second time fine finishining in hole is finished, keep electrode, directly carry out hole S6 first pass fine finishining;
After hole S6 first pass fine finishining is finished, change electrode, carry out second time fine finishining of hole S6.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102500966A CN102085585A (en) | 2009-12-04 | 2009-12-04 | Underwater electric spark series hole shaping method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009102500966A CN102085585A (en) | 2009-12-04 | 2009-12-04 | Underwater electric spark series hole shaping method |
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| CN102085585A true CN102085585A (en) | 2011-06-08 |
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| CN2009102500966A Pending CN102085585A (en) | 2009-12-04 | 2009-12-04 | Underwater electric spark series hole shaping method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112247298A (en) * | 2020-12-23 | 2021-01-22 | 中国航发上海商用航空发动机制造有限责任公司 | Machining method of fuel oil spray hole and fuel oil spray nozzle |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1565558B2 (en) * | 1965-12-20 | 1975-10-02 | Gen Electric | Process for the electrolytic production of holes or cavities in an electrically conductive workpiece |
| JPH04244318A (en) * | 1991-01-10 | 1992-09-01 | Toshiba Corp | Underwater cutting device |
| FR2682803A1 (en) * | 1991-10-21 | 1993-04-23 | Framatome Sa | Method and device for taking a sample from the vessel of a nuclear reactor in final shutdown |
| JPH06182627A (en) * | 1992-12-17 | 1994-07-05 | Hitachi Ltd | Submerged electric discharge machining method and apparatus |
| US20020148814A1 (en) * | 2001-04-12 | 2002-10-17 | Elenix, Inc. | Small hole electric discharge machine drill provided with depth-specific processing means and method of depth-specific processing with small hole electric discharge machine drill |
| JP3795290B2 (en) * | 2000-02-09 | 2006-07-12 | 株式会社日立製作所 | EDM cutting device |
-
2009
- 2009-12-04 CN CN2009102500966A patent/CN102085585A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1565558B2 (en) * | 1965-12-20 | 1975-10-02 | Gen Electric | Process for the electrolytic production of holes or cavities in an electrically conductive workpiece |
| JPH04244318A (en) * | 1991-01-10 | 1992-09-01 | Toshiba Corp | Underwater cutting device |
| FR2682803A1 (en) * | 1991-10-21 | 1993-04-23 | Framatome Sa | Method and device for taking a sample from the vessel of a nuclear reactor in final shutdown |
| JPH06182627A (en) * | 1992-12-17 | 1994-07-05 | Hitachi Ltd | Submerged electric discharge machining method and apparatus |
| JP3795290B2 (en) * | 2000-02-09 | 2006-07-12 | 株式会社日立製作所 | EDM cutting device |
| US20020148814A1 (en) * | 2001-04-12 | 2002-10-17 | Elenix, Inc. | Small hole electric discharge machine drill provided with depth-specific processing means and method of depth-specific processing with small hole electric discharge machine drill |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112247298A (en) * | 2020-12-23 | 2021-01-22 | 中国航发上海商用航空发动机制造有限责任公司 | Machining method of fuel oil spray hole and fuel oil spray nozzle |
| CN112247298B (en) * | 2020-12-23 | 2021-03-26 | 中国航发上海商用航空发动机制造有限责任公司 | Machining method of fuel oil spray hole and fuel oil spray nozzle |
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Application publication date: 20110608 |