CN102476260A - Manufacturing method for chip-resistant plate of lower tube seat - Google Patents
Manufacturing method for chip-resistant plate of lower tube seat Download PDFInfo
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- CN102476260A CN102476260A CN2010105573603A CN201010557360A CN102476260A CN 102476260 A CN102476260 A CN 102476260A CN 2010105573603 A CN2010105573603 A CN 2010105573603A CN 201010557360 A CN201010557360 A CN 201010557360A CN 102476260 A CN102476260 A CN 102476260A
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Abstract
The invention belongs to the technical field of chip-resistant plates, and particularly relates to a manufacturing method for a chip-resistant plate of a lower tube seat. The technical scheme of the invention comprises the following steps of: processing a middle hole and a guide hole; processing a bottom square hole; processing the appearance of the chip-resistant plate; leveling; performing ageing treatment; and processing a square hole. Due to the adoption of the manufacturing method, the technical problems of high local electrode loss and low working efficiency caused by frequent secondary discharge since an electrical erosion product is difficult to discharge in time in the conventional chip-resistant plate are solved. According to the invention, the processing area of an electric spark machine tool is reduced by 80 percent, the electrical erosion product is discharged in time, and high local electrode loss caused by frequent secondary discharge is avoided; and moreover, the square hole is processed by adopting a combined electrode, so that replacement of an electrode is avoided, maintenance is facilitated, and working efficiency is greatly increased.
Description
Technical field
The invention belongs to anti-bits plate technique field, be specifically related to the anti-bits of a kind of bottom nozzle board fabrication method.
Background technology
The anti-bits of bottom nozzle plate is mainly used in the foreign matter that prevents in the loop and enters into fuel assembly fuel rod is caused damage, and has the effect of dispense flow rate.
Anti-bits plate is generally by an interstitial hole that is positioned at the center, and several are dispersed in the pilot hole on the anti-bits plate, and thousands of square opening is formed.Square opening adopts once-forming technology in the existing anti-bits plate, promptly directly square opening is drilled into and requires size, and this anti-bits board fabrication method causes the galvanic corrosion product to be difficult to timely discharge, and then the formation secondary discharge frequently causes the big problem of the local loss of electrode; In addition, the mode of the manual replacing electrode that uses in the existing anti-bits board fabrication method is processed square opening, has greatly reduced operating efficiency.
Summary of the invention
The invention solves existing anti-bits plate galvanic corrosion product and be difficult to timely discharge, and then form secondary discharge and frequently cause the local loss of electrode big, and the low technical problem of operating efficiency.
Technical scheme of the present invention is described below:
The anti-bits of a kind of bottom nozzle board fabrication method may further comprise the steps:
The anti-bits of step 3. processing plate profile;
Wherein, step 1 specifically may further comprise the steps:
Step 1.1. preprocessing interstitial hole and pilot hole:
Step 1.1.1 utilizes diameter to bore interstitial hole for the drill bit of 8mm in anti-bits plate center;
Step 1.1.2. is the origin of coordinates with the interstitial hole center of circle, and unit distance is on the coordinate system of 1mm, respectively with (0, ± a), (0; ± b), (± a, 0), (± b, 0); (± a, ± a), (± b, ± b), (± b; ± a), (± c, ± c) totally 24 coordinates are round dot, utilize the bit drills pilot hole of diameter for 8mm; Wherein, 35≤a≤40,72≤b≤78,60≤c≤65, its preferred value is a=37.72, b=75.44, c=62.87.
Step 1.2. fine finishining interstitial hole and pilot hole:
Step 1.2.1. utilizes diameter to be 15mm for the milling cutter of 9mm expands interstitial hole to diameter;
Step 1.2.2. utilizes diameter to be 9mm for the milling cutter of 9mm expands 24 pilot holes to diameter respectively;
Step 1.2.3. utilize diameter be 12 * 28 ° rose reamer respectively with aperture chamfer machining to 28 degree of 24 pilot holes, orifice diameter is 10.7mm.
Utilize the drill bit of diameter 3mm to bore full square opening bottom outlet at anti-bits plate interstitial hole and other position beyond the pilot hole in the step 2., the distance at adjacent two square opening bottom outlet centers is 3.75mm.
Step 3.1. utilizes carbide cutter tool will prevent considering to be worth doing plate, and to cut into the center of circle with interstitial hole be the center, be of a size of the square of 200mm * 200mm～210mm * 210mm, and preferred size is 204.7mm * 204.7mm;
It is chamfering on 8 * 45 ° the anti-bits of the rose reamer processing plate side that step 3.2. utilizes diameter;
It is chamfering under 8 * 45 ° the anti-bits of the rose reamer processing plate side that step 3.3. utilizes diameter.
To prevent considering to be worth doing plate in the step 5 is placed on and carries out Ageing Treatment in the vacuum drying oven.
The square opening bottom outlet that step 6 utilizes spark-erosion machine tool that step 2 is got out breaks into the square opening of 3.3mm * 3.3mm, and the distance between the Kong Yukong is 0.45mm.As preferred version of the present invention, described spark-erosion machine tool adopts compound electrode, and said compound electrode comprises the quantity and the position of electrode and prevents that the quantity and the position of bits plate square opening bottom outlet are corresponding.
As improvement project of the present invention, above-mentioned steps 3 also comprises:
Step 3.4. utilizes diameter respectively to bore a pin-and-hole for the drill bit of 3.8mm at four drift angles of anti-bits plate.
Beneficial effect of the present invention is:
(1) relatively and the technological room case of once-forming square opening; Because the present invention has adopted and has got out the square opening bottom outlet earlier; And then the technical scheme of on the basis of square opening bottom outlet, processing square opening; Make the working (finishing) area of spark-erosion machine tool reduce 80%, and the galvanic corrosion product is in time discharged, solved secondary discharge simultaneously and frequently caused the big problem of the local loss of electrode; In addition, adopt compound electrode processing square opening, avoided the replacing electrode, be convenient to repair and safeguard, will be reduced to 8 hours from 30 hours process time, greatly improved operating efficiency;
(2) four drift angles at anti-bits plate respectively bore a pin-and-hole, and anti-bits plate conveniently is fixed on the bottom nozzle through pinning reliably.
Description of drawings
Fig. 1 is the anti-bits of an a kind of bottom nozzle of the present invention board fabrication method flow chart;
Fig. 2 utilizes the anti-bits plate vertical view that is drilled with the square opening bottom outlet in the step 2 of anti-bits board fabrication method of the present invention manufacturing;
Fig. 3 is the pilot hole side view that utilizes the anti-bits plate of anti-bits board fabrication method manufacturing of the present invention.
Wherein, 1-interstitial hole, 2-pilot hole, 3-pin-and-hole, 4～12-square opening zone.
The specific embodiment
Below in conjunction with the accompanying drawing and the specific embodiment the anti-bits of bottom nozzle of the present invention board fabrication method is described in detail:
As shown in Figure 1, the anti-bits of the bottom nozzle of present embodiment board fabrication method may further comprise the steps:
The anti-bits of step 3. processing plate profile;
The anti-bits of the bottom nozzle of present embodiment board fabrication method may further comprise the steps:
Step 1.1. preprocessing interstitial hole 1 and pilot hole 2:
Step 1.1.1 utilizes diameter to bore interstitial hole 1 for the drill bit of 8mm in anti-bits plate center, and wherein, the preferred thickness of anti-bits plate is 3mm;
Step 1.1.2. is as shown in Figure 2, is the origin of coordinates with interstitial hole 1 center of circle, and unit distance is on the coordinate system of 1mm, respectively with (0, ± a); (0, ± b), (± a, 0), (± b; 0), (± a, ± a), (± b, ± b); (± b, ± a), (± c, ± c) totally 24 coordinates are round dot, utilize the bit drills pilot hole 2 of diameter for 8mm; Wherein, 35≤a≤40,72≤b≤78,60≤c≤65.For example: a=37.72, b=75.44, c=62.87; Or a=35, b=72, c=60; Or a=40, b=78, c=65.
Step 1.2. fine finishining interstitial hole 1 and pilot hole 2:
Step 1.2.1. utilizes diameter to be 15mm for the milling cutter of 9mm expands interstitial hole 1 to diameter;
Step 1.2.2. utilizes diameter to be 9mm for the milling cutter of 9mm expands 24 pilot holes 2 to diameter respectively;
Step 1.2.3. is as shown in Figure 3, utilize diameter be 12 * 28 ° rose reamer respectively with aperture chamfer machining to 28 degree of 24 pilot holes 2, orifice diameter is 10.7mm.
As shown in Figure 2, be regional summit with interstitial hole 1 and 24 pilot holes 2, the square opening bottom outlet of anti-bits plate is divided into 36 square opening zones in the present embodiment, and wherein, upper left, upper right, the left side of anti-bits plate is down, the bottom right each several part comprises 9 square openings zones 4～12 respectively.The arrangement left-right symmetric of the arrangement of upper right portion square opening bottom outlet and upper left square opening bottom outlet; The arrangement of the arrangement of bottom left section square opening bottom outlet and upper left square opening bottom outlet is symmetry up and down; The arrangement center symmetry of the arrangement of lower right-most portion square opening bottom outlet and upper left square opening bottom outlet.The arrangement of square opening need be adjusted according to actual conditions in said 36 zones, and this is a general knowledge as well known to those skilled in the art.
The anti-bits of step 3. processing plate profile:
Step 3.1. utilizes carbide cutter tool will prevent considering to be worth doing plate, and to cut into the center of circle with interstitial hole 1 be the center, be of a size of the square of 200mm * 200mm～210mm * 210mm; For example size can be 200mm * 200mm; Or 204.7mm * 204.7mm, or 210mm * 210mm;
It is chamfering on 8 * 45 ° the anti-bits of the rose reamer processing plate side that step 3.2. utilizes diameter;
It is chamfering under 8 * 45 ° the anti-bits of the rose reamer processing plate side that step 3.3. utilizes diameter.
The difference of present embodiment and embodiment 2 is:
The described spark-erosion machine tool of step 6 adopts compound electrode, and said compound electrode comprises the quantity and the position of electrode and prevents that the quantity and the position of bits plate square opening bottom outlet are corresponding.When boring square opening, all square opening bottom outlets can be at the effect property formation next time square opening of compound electrode, thereby has avoided changing the operation that electrode is processed one by one, makes an anti-time of considering plate to be worth doing to be reduced to 8 hours from 30 hours, has greatly improved operating efficiency.
The difference of present embodiment and embodiment 2,3 is:
The difference of present embodiment and embodiment 2,3,4 is:
Claims (11)
1. a bottom nozzle is prevented the bits board fabrication method, may further comprise the steps:
Step 1. processing interstitial hole (1) and pilot hole (2);
Step 2. processing square opening bottom outlet;
The anti-bits of step 3. processing plate profile;
Step 4. smoothing;
Step 5. Ageing Treatment;
Step 6. processing square opening.
2. the anti-bits of bottom nozzle according to claim 1 board fabrication method, it is characterized in that: step 1 specifically may further comprise the steps:
Step 1.1. preprocessing interstitial hole (1) and pilot hole (2):
Step 1.1.1 utilizes diameter to bore interstitial hole (1) for the drill bit of 8mm in anti-bits plate center;
Step 1.1.2. is the origin of coordinates with interstitial hole (1) center of circle, and unit distance is on the coordinate system of 1mm, respectively with (0, ± a), (0; ± b), (± a, 0), (± b, 0); (± a, ± a), (± b, ± b), (± b; ± a), (± c, ± c) totally 24 coordinates are round dot, utilize the bit drills pilot hole (2) of diameter for 8mm; Wherein, 35≤a≤40,72≤b≤78,60≤c≤65;
Step 1.2. fine finishining interstitial hole (1) and pilot hole (2):
Step 1.2.1. utilize diameter for the milling cutter of 9mm with interstitial hole (1) expand to diameter be 15mm;
Step 1.2.2. utilize diameter for the milling cutter of 9mm respectively with 24 pilot holes (2) expand to diameter be 9mm;
Step 1.2.3. utilize diameter be 12 * 28 ° rose reamer respectively with aperture chamfer machining to 28 degree of 24 pilot holes (2), orifice diameter is 10.7mm.
3. the anti-bits of bottom nozzle according to claim 2 board fabrication method is characterized in that: a=37.72, b=75.44, c=62.87.
4. the anti-bits of bottom nozzle according to claim 1 board fabrication method; It is characterized in that: utilize the drill bit of diameter 3mm to bore full square opening bottom outlet at anti-bits plate interstitial hole (1) and pilot hole (2) other position in addition in the step 2, the distance at adjacent two square opening bottom outlet centers is 3.75mm.
5. the anti-bits of bottom nozzle according to claim 1 board fabrication method, it is characterized in that: step 3 specifically may further comprise the steps:
Step 3.1. utilizes carbide cutter tool will prevent considering to be worth doing plate, and to cut into the center of circle with interstitial hole (1) be the center, be of a size of the square of 200mm * 200mm～210mm * 210mm;
It is chamfering on 8 * 45 ° the anti-bits of the rose reamer processing plate side that step 3.2. utilizes diameter;
It is chamfering under 8 * 45 ° the anti-bits of the rose reamer processing plate side that step 3.3. utilizes diameter.
6. the anti-bits of bottom nozzle according to claim 5 board fabrication method is characterized in that: to cut into the center of circle with interstitial hole (1) be the center, be of a size of the square of 204.7mm * 204.7mm to utilize carbide cutter tool will prevent considering to be worth doing plate in the step 3.1.
7. the anti-bits of bottom nozzle according to claim 5 board fabrication method, it is characterized in that: step 3 also comprises:
Step 3.4. utilizes diameter respectively to bore a pin-and-hole (3) for the drill bit of 3.8mm at four drift angles of anti-bits plate.
8. the anti-bits of bottom nozzle according to claim 1 board fabrication method is characterized in that: step 4 adopts the method for artificial smoothing or machinery smoothing to make anti-bits plate reach the requirement of flatness 0.2mm.
9. the anti-bits of bottom nozzle according to claim 1 board fabrication method is characterized in that: will prevent considering to be worth doing plate in the step 5 and be placed on and carry out Ageing Treatment in the vacuum drying oven.
10. the anti-bits of bottom nozzle according to claim 1 board fabrication method, it is characterized in that: the square opening bottom outlet that step 6 utilizes spark-erosion machine tool that step 2 is got out breaks into the square opening of 3.3mm * 3.3mm, and the distance between the Kong Yukong is 0.45mm.
11. the anti-bits of bottom nozzle according to claim 10 board fabrication method is characterized in that: the described spark-erosion machine tool of step 6 adopts compound electrode, said compound electrode comprises the quantity and the position of electrode and prevents that the quantity and the position of bits plate square opening bottom outlet are corresponding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105573603A CN102476260A (en) | 2010-11-23 | 2010-11-23 | Manufacturing method for chip-resistant plate of lower tube seat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105573603A CN102476260A (en) | 2010-11-23 | 2010-11-23 | Manufacturing method for chip-resistant plate of lower tube seat |
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| Publication Number | Publication Date |
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| CN102476260A true CN102476260A (en) | 2012-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105573603A Pending CN102476260A (en) | 2010-11-23 | 2010-11-23 | Manufacturing method for chip-resistant plate of lower tube seat |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104400340A (en) * | 2014-10-29 | 2015-03-11 | 苏州市金德誉精密机械有限公司 | Processing technique of plugboard |
| CN106736292A (en) * | 2016-12-28 | 2017-05-31 | 中核北方核燃料元件有限公司 | A kind of advanced pressurized water reactor fuel element base machining process |
| CN112719294A (en) * | 2020-12-29 | 2021-04-30 | 中核建中核燃料元件有限公司 | Laser 3D printing manufacturing method of AISI660 chip prevention plate |
| CN112792745A (en) * | 2020-12-29 | 2021-05-14 | 中核建中核燃料元件有限公司 | Water jet cutting manufacturing method for chip-proof plate |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101073839A (en) * | 2007-05-28 | 2007-11-21 | 中铁宝桥股份有限公司 | Method for manufacturing ear-plate pin hinged-connection structure of stayed-cable bridge |
| CN201175848Y (en) * | 2008-03-17 | 2009-01-07 | 羊立民 | Chip-proof device of multi-surface cutting instrument machine tool |
| US7822165B2 (en) * | 2004-01-05 | 2010-10-26 | Westinghouse Electric Co Llc | Nuclear fuel assembly debris filter bottom nozzle |
-
2010
- 2010-11-23 CN CN2010105573603A patent/CN102476260A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7822165B2 (en) * | 2004-01-05 | 2010-10-26 | Westinghouse Electric Co Llc | Nuclear fuel assembly debris filter bottom nozzle |
| CN101073839A (en) * | 2007-05-28 | 2007-11-21 | 中铁宝桥股份有限公司 | Method for manufacturing ear-plate pin hinged-connection structure of stayed-cable bridge |
| CN201175848Y (en) * | 2008-03-17 | 2009-01-07 | 羊立民 | Chip-proof device of multi-surface cutting instrument machine tool |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104400340A (en) * | 2014-10-29 | 2015-03-11 | 苏州市金德誉精密机械有限公司 | Processing technique of plugboard |
| CN106736292A (en) * | 2016-12-28 | 2017-05-31 | 中核北方核燃料元件有限公司 | A kind of advanced pressurized water reactor fuel element base machining process |
| CN112719294A (en) * | 2020-12-29 | 2021-04-30 | 中核建中核燃料元件有限公司 | Laser 3D printing manufacturing method of AISI660 chip prevention plate |
| CN112792745A (en) * | 2020-12-29 | 2021-05-14 | 中核建中核燃料元件有限公司 | Water jet cutting manufacturing method for chip-proof plate |
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Application publication date: 20120530 |