CN109967962A - A kind of round nut breaks cutting tool and its application method - Google Patents
A kind of round nut breaks cutting tool and its application method Download PDFInfo
- Publication number
- CN109967962A CN109967962A CN201711440249.4A CN201711440249A CN109967962A CN 109967962 A CN109967962 A CN 109967962A CN 201711440249 A CN201711440249 A CN 201711440249A CN 109967962 A CN109967962 A CN 109967962A
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- China
- Prior art keywords
- nut
- round nut
- hole
- cutting tool
- gland
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P11/00—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Abstract
The present invention relates to a kind of round nuts to break cutting tool, comprising: 1) preset torque spanner and nut adapter head；2) magnetic drill and positioning device, for carrying out drilling and reaming to gland round nut or through-hole round nut；The positioning device, for installation positioning of the magnetic drill at the top of control rod drive mechanism；3) nut break cutting tool, for after drilling and reaming gland round nut or through-hole round nut further break cut.Deflation valve insert replaces tool at the top of a kind of control rod drive mechanism of the present invention, can efficiently and safely remove the gland round nut at the top of pneumatic shell, can guarantee not damage screw rod during dismounting；The fixed concentricity for also ensuring adapter head and nut simultaneously of nut is prevented adapter head skew from causing additional torque by 4 convex stupefied 4 through slots cooperations on gland round nut excircle on nut adapter head.
Description
Technical field
The invention belongs to nuclear power stations to repair field, and in particular to a kind of round nut breaks cutting tool and its application method.
Background technique
Nuclear power station control rod drive mechanism pressure resistance case member pushes down head sealing cover by gland round nut, and head sealing cover passes through close again
Seal makes pressure-resistant case member reach sealing function, as shown in Figure 1.In the long-term use, make gland due to various reasons
The screw portion of round nut or through-hole round nut and pneumatic shell is killed, and the two cannot be made to separate by normal torsion, only
The method for cutting nut can be taken to remove nut brokenly, then replace gasket.Since the pneumatic shell of control rod drive mechanism belongs to
Critical component, screw portion should be protected in broken cut, avoid being destroyed.
Since the broken cutting tool of traditional nut may damage screw rod and screw thread during broken cut, so traditional spiral shell
The broken cutting tool of mother is not applied for the occasion, and breaks cutting tool currently without the nut for being suitable for the occasion.
Summary of the invention
It is an object of the invention to: a kind of round nut is provided and breaks cutting tool and its application method, can solve control rod drive
The screw rod of top round nut and pneumatic shell is killed when the replacement of deflation valve insert at the top of motivation structure, can not normally replace sealing
The problem of pad.
Technical scheme is as follows: a kind of broken cutting tool of round nut, comprising:
1) preset torque spanner and nut adapter head
For judging whether gland round nut or through-hole round nut and screw rod kill；
Torque value is arranged in the preset torque spanner stepping, using preceding setting torque value and is demarcated, when torque reaches
Slipping of clutch after to setting value in spanner prevents torque is excessive from screw thread being caused to damage；
Described nut adapter head one end is equipped with four to match with four through slots of gland round nut or through-hole round nut
Fin, is additionally provided with gland round nut the positioning convex platform A to match with the circular hole at the top of it, the other end of nut adapter head
It is connect with preset torque spanner；
2) magnetic drill and positioning device
The magnetic drill can connect drill bit or milling cutter, for gland round nut or through-hole round nut carry out drilling and
Reaming；
The positioning device, for installation positioning of the magnetic drill at the top of control rod drive mechanism, including top plate and bottom plate
With hollow connecting column connecting the two；
It is enclosed to the positioning convex platform B to match with the circular hole at the top of gland round nut is had the center of the top plate
Around positioning convex platform B to having the stop pin to match with four through slots of gland round nut or through-hole round nut；Around positioning
The position of boss B and the stop pin that is staggered is equipped with drill jig hole, and the drill bit for magnetic drill is inserted into；Peace there are four being set on the top plate
Hole is filled, for connecting magnetic drill；
Clamp system is equipped with below the bottom plate, for being fixed on the pneumatic shell of control rod drive mechanism；
3) nut breaks cutting tool
It includes cutter, the broken cutting tool main body of nut, hydraulic hand-pump and oil pipe that the nut, which breaks cutting tool, for brill
Gland round nut or through-hole round nut behind hole and reaming, which are further broken, to be cut.
The side of the drill jig hole is equipped with chip-removal hole, and the iron filings generated when for by drilling and reaming remove away in time.
It is additionally provided with scrap collection system, for collecting the iron filings under drilling and milling, prevents iron filings from falling into control rod driving
In mechanism.
The clamp system is three clamping jaws being evenly distributed on bottom plate.
The hollow connecting column is equipped with observation window, for observing operating condition when drilling.
A kind of round nut breaks the application method of cutting tool as described in the present invention, includes the following steps,
Step 1 differentiates that gland round nut or through-hole round nut are with screw rod using preset torque spanner and nut adapter head
It is no to kill；
Positioning device is securely fixed in control rod drive mechanism top by three clamping jaws if killed by step 2
Portion, the positioning convex platform B in positioning device are matched with the circular hole on gland round nut or through-hole round nut, anti-in positioning device
Ship and resell on another market and matched with the through slot on gland round nut or through-hole round nut, with guarantee positioning device relative to round nut position just
Really；
Step 3, magnetic drill is fixed on the positioning device, and den bohrkopf einsetzen, the drill jig hole that drill bit passes through in positioning device exists
It drills on gland round nut or through-hole round nut, being drilled bit change-over behind hole is that milling cutter carries out reaming；When being drilled and expand
Behind a complete hole, three clamping jaws are unclamped, by tooling together with reinstalling and boring and expand second hole after magnetic drill turnback, are bored
It is complete and expanded and remove magnetic drill and positioning device behind second hole；
Nut is broken the point of a knife alignment the 3rd that cutting tool covers on gland round nut or through-hole round nut and makes cutter by step 4
Bored hole is walked, after breaking cutting tool pressurization to nut using hydraulic hand-pump, cutter is along nut radial motion, the wedge-shaped sword of cutter
Mouth is embedded in nut, and with the increase of insert depth, two wedge shaped side of cutter tears apart the nut after drilling to come, at this time spiral shell
The thread separation that female and screw rod is killed is opened, it is removed from screw rod.
Remarkable result of the invention is:
1) a kind of round nut of the present invention breaks cutting tool, can efficiently and safely remove the gland round nut at the top of pneumatic shell,
It can guarantee not damage screw rod during dismounting；
2) 4 convex stupefied 4 through slots cooperations on gland round nut excircle on nut adapter head are fixed same by nut
When also ensure the concentricity of adapter head and nut, prevent adapter head skew from causing additional torque；
3) positioned when positioning device is installed using gland round nut itself, reduce position error, thus protect screw thread not by
Damage；Drill jig hole in positioning device prevents cutter beat from screw thread being caused to damage；It first passes through drill bit and bores a hole on nut,
Hole is expanded with milling cutter again, can be improved hole machining accuracy simultaneously prevented also from processing when chisel edge point damage other zero
Part；Slug collection device can effectively prevent the scrap generated during processing hole to fall into control rod drive mechanism；It is broken to cut
Tool it is broken cut nut when using longitudinally it is broken cut by the way of, screw rod does not stress, and avoids broken and damages screw rod and screw thread during cutting.
Detailed description of the invention
Fig. 1 is vent valve sealed structure chart at the top of control rod drive mechanism；
Fig. 2 is preset torque spanner and nut adapter head structural schematic diagram；
Fig. 3 is nut adapter head structural schematic diagram；
Fig. 4 is tool positioning device structural schematic diagram one；
Fig. 5 is tool positioning device structural schematic diagram two；
Fig. 6 is magnetic drill drilling schematic diagram；
Fig. 7 is that nut breaks cutting tool structure chart；
In figure: 1. preset torque spanners, 2. nut adapter heads, 3. fins, 4. positioning convex platform A, 5. top plates, 6. bottom plates, 7.
Hollow connecting column, 8. clamp systems, 9. drill jig holes, 10. chip-removal holes, 11. positioning convex platform B, 12. stop pins, 13. mounting holes,
14. magnetic drill, 15. positioning devices, 16. hydraulic hand-pumps, 17. oil pipes, 18. cutters, 19. nuts break cutting tool main body.
Specific embodiment
With reference to the accompanying drawing and specific embodiment is further detailed to a kind of broken cutting tool work of round nut of the present invention
Explanation.
As illustrated in figs. 2-7, a kind of round nut breaks cutting tool, comprising:
1) preset torque spanner 1 and nut adapter head 2
For judging whether gland round nut or through-hole round nut and screw rod kill；
Torque value is arranged in 1 stepping of preset torque spanner, using preceding setting torque value and is demarcated, when torque reaches
Slipping of clutch after to setting value in spanner prevents torque is excessive from screw thread being caused to damage；
Described 2 one end of nut adapter head is equipped with four to match with four through slots of gland round nut or through-hole round nut
Fin 3, is additionally provided with gland round nut the positioning convex platform A4 to match with the circular hole at the top of it, nut adapter head 2 it is another
One end is connect with preset torque spanner 1；
2) magnetic drill 14 and positioning device 15
The magnetic drill 14 can connect drill bit or milling cutter, for drilling to gland round nut or through-hole round nut
And reaming；
The positioning device 15, for installation positioning of the magnetic drill 14 at the top of control rod drive mechanism, including top plate
5, bottom plate 6 and hollow connecting column 7 connecting the two；
The center of the top plate 5 is to having the positioning convex platform to match with the circular hole at the top of gland round nut
B11, around positioning convex platform B11 to having the stop pin to match with four through slots of gland round nut or through-hole round nut
12；It is equipped with drill jig hole 9 around the position of positioning convex platform B11 and the stop pin 12 that is staggered, the drill bit for magnetic drill is inserted into；Described
Mounting hole 13 there are four being set on top plate 5, for connecting magnetic drill 14；
Clamp system 8 is equipped with below the bottom plate 6, for being fixed on the pneumatic shell of control rod drive mechanism；
3) nut breaks cutting tool
It includes that cutter 18, nut break cutting tool main body 19, hydraulic hand-pump 16 and oil pipe 17 that the nut, which breaks cutting tool,
For to after drilling and reaming gland round nut or through-hole round nut further break cut.
The side of the drill jig hole 9 is equipped with chip-removal hole 10, and the iron filings generated when for by drilling and reaming remove away in time.
It is additionally provided with scrap collection system, for collecting the iron filings under drilling and milling, prevents iron filings from falling into control rod driving
In mechanism.
The clamp system 8 is three clamping jaws being evenly distributed on bottom plate 6.
The hollow connecting column 7 is equipped with observation window, for observing operating condition when drilling.
A kind of round nut breaks the application method of cutting tool as described in the present invention, includes the following steps,
Step 1 differentiates gland round nut or through-hole round nut and screw rod using preset torque spanner 1 and nut adapter head 2
Whether kill；
Positioning device 15 is securely fixed in control rod drive mechanism top by three clamping jaws if killed by step 2
Portion, the positioning convex platform B11 in positioning device 15 are matched with the circular hole on gland round nut or through-hole round nut, positioning device 15
On stop pin 12 matched with the through slot on gland round nut or through-hole round nut, with guarantee positioning device 15 relative to circle spiral shell
Female position is correct；
Magnetic drill 14 is fixed in positioning device 15, den bohrkopf einsetzen by step 3, and drill bit passes through the brill in positioning device 15
Die hole 9 drills on gland round nut or through-hole round nut, and being drilled bit change-over behind hole is that milling cutter carries out reaming；Work as brill
It is complete and after having expanded a hole, three clamping jaws are unclamped, by tooling together with reinstalling after 14 turnback of magnetic drill and bore and expand the
Two holes are drilled and remove magnetic drill 14 and positioning device 15 after having expanded second hole；
Nut is broken cutting tool and covers on gland round nut or through-hole round nut and be directed at the point of a knife of cutter 18 by step 4
The hole that step 3 is bored, after breaking cutting tool pressurization to nut using hydraulic hand-pump 16, cutter 18 is along nut radial motion, cutter
18 wedge-shaped cutting edge is embedded in nut, and with the increase of insert depth, 18 liang of wedge shaped sides of cutter tear the nut after drilling
It rips and, the thread separation that nut and screw rod are killed at this time is opened, it is removed from screw rod.
Claims (6)
1. a kind of round nut breaks cutting tool characterized by comprising
1) preset torque spanner (1) and nut adapter head (2)
For judging whether gland round nut or through-hole round nut and screw rod kill；
Torque value is arranged in preset torque spanner (1) stepping, using preceding setting torque value and is demarcated, when torque reaches
Slipping of clutch after setting value in spanner prevents torque is excessive from screw thread being caused to damage；
Described nut adapter head (2) one end is equipped with four to match with four through slots of gland round nut or through-hole round nut
Fin (3) is additionally provided with gland round nut the positioning convex platform A (4) to match with the circular hole at the top of it, nut adapter head (2)
The other end connect with preset torque spanner (1)；
2) magnetic drill (14) and positioning device (15)
The magnetic drill (14) can connect drill bit or milling cutter, for gland round nut or through-hole round nut carry out drilling and
Reaming；
The positioning device (15), for the installation positioning of magnetic drill (14) at the top of control rod drive mechanism, including top plate
(5), bottom plate (6) and hollow connecting column connecting the two (7)；
The center of the top plate (5) to having the positioning convex platform B (11) to match with the circular hole at the top of gland round nut,
Around positioning convex platform B (11) to having the stop pin to match with four through slots of gland round nut or through-hole round nut
(12)；Drill jig hole (9) are equipped with around the position of positioning convex platform B (11) and the stop pin that is staggered (12), the drill bit for magnetic drill is inserted
Enter；There are four being set on the top plate (5) mounting hole (13), for connecting magnetic drill (14)；
Clamp system (8) are equipped with below the bottom plate (6), for being fixed on the pneumatic shell of control rod drive mechanism；
3) nut breaks cutting tool
It includes cutter (18), nut broken cutting tool main body (19), hydraulic hand-pump (16) and oil pipe that the nut, which breaks cutting tool,
(17), for after drilling and reaming gland round nut or through-hole round nut further break cut.
2. a kind of round nut as described in claim 1 breaks cutting tool, it is characterised in that: set beside the drill jig hole (9)
There are chip-removal hole (10), the iron filings generated when for by drilling and reaming remove away in time.
3. a kind of round nut as described in claim 1 breaks cutting tool, it is characterised in that: be additionally provided with scrap collection system, be used for
The iron filings under drilling and milling are collected, prevent iron filings from falling into control rod drive mechanism.
4. a kind of round nut as described in claim 1 breaks cutting tool, it is characterised in that: the clamp system (8) is uniform
Three clamping jaws being distributed on bottom plate (6).
5. a kind of round nut as described in claim 1 breaks cutting tool, it is characterised in that: set on the hollow connecting column (7)
There is observation window, for observing operating condition when drilling.
6. the application method that a kind of round nut as described in claim 1 breaks cutting tool, it is characterised in that: include the following steps,
Step 1 differentiates gland round nut or through-hole round nut and screw rod using preset torque spanner (1) and nut adapter head (2)
Whether kill；
Positioning device (15) is securely fixed in control rod drive mechanism top by three clamping jaws if killed by step 2
Portion, the positioning convex platform B (11) in positioning device (15) are matched with the circular hole on gland round nut or through-hole round nut, positioning dress
The stop pin (12) set on (15) is matched with the through slot on gland round nut or through-hole round nut, to guarantee positioning device (15)
Position relative to round nut is correct；
Magnetic drill (14) is fixed on positioning device (15), den bohrkopf einsetzen by step 3, and drill bit passes through on positioning device (15)
Drill jig hole (9) drills on gland round nut or through-hole round nut, and being drilled bit change-over behind hole is that milling cutter carries out reaming；
After being drilled and having expanded a hole, unclamp three clamping jaws, by tooling together with reinstalled after magnetic drill (14) turnback and bore and
Expand second hole, be drilled and remove magnetic drill (14) and positioning device (15) after having expanded second hole；
Nut is broken the point of a knife alignment the 3rd that cutting tool covers on gland round nut or through-hole round nut and makes cutter (18) by step 4
Bored hole is walked, after breaking cutting tool pressurization to nut using hydraulic hand-pump (16), cutter (18) is along nut radial motion, cutter
(18) wedge-shaped cutting edge is embedded in nut, and with the increase of insert depth, (18) two wedge shaped side of cutter is by the spiral shell after drilling
Mother, which tears apart, to come, and the thread separation that nut and screw rod are killed at this time is opened, it is removed from screw rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711440249.4A CN109967962B (en) | 2017-12-27 | 2017-12-27 | Round nut breaking tool and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711440249.4A CN109967962B (en) | 2017-12-27 | 2017-12-27 | Round nut breaking tool and use method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109967962A true CN109967962A (en) | 2019-07-05 |
| CN109967962B CN109967962B (en) | 2023-08-15 |
Family
ID=67071032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711440249.4A Active CN109967962B (en) | 2017-12-27 | 2017-12-27 | Round nut breaking tool and use method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109967962B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111805481A (en) * | 2020-07-20 | 2020-10-23 | 中国核动力研究设计院 | Cadmium-storage grid disassembling equipment for second-generation nuclear power station spent fuel |
Citations (7)
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|---|---|---|---|---|
| GB1244289A (en) * | 1969-01-23 | 1971-08-25 | Siemens Ag | A method of tightening or releasing bolts |
| US3906628A (en) * | 1973-08-23 | 1975-09-23 | Williams Drop Forging & Tools | Tool for splitting nuts |
| US3997960A (en) * | 1976-02-19 | 1976-12-21 | Kenyon David L | Automobile lock removal tool |
| CN1693029A (en) * | 2004-04-30 | 2005-11-09 | 特拉华资本构成公司 | Systems adapted to cooperate with an aperture forming tool and methods |
| CN104117966A (en) * | 2014-07-15 | 2014-10-29 | 湖北旭扬工贸有限公司 | Special disassembly tool for withdrawing bolt |
| CN204868750U (en) * | 2015-06-26 | 2015-12-16 | 中国石油天然气股份有限公司 | Nut breaker |
| CN207997095U (en) * | 2017-12-27 | 2018-10-23 | 核动力运行研究所 | A kind of broken cutting tool of round nut |
-
2017
- 2017-12-27 CN CN201711440249.4A patent/CN109967962B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1244289A (en) * | 1969-01-23 | 1971-08-25 | Siemens Ag | A method of tightening or releasing bolts |
| US3906628A (en) * | 1973-08-23 | 1975-09-23 | Williams Drop Forging & Tools | Tool for splitting nuts |
| US3997960A (en) * | 1976-02-19 | 1976-12-21 | Kenyon David L | Automobile lock removal tool |
| CN1693029A (en) * | 2004-04-30 | 2005-11-09 | 特拉华资本构成公司 | Systems adapted to cooperate with an aperture forming tool and methods |
| CN104117966A (en) * | 2014-07-15 | 2014-10-29 | 湖北旭扬工贸有限公司 | Special disassembly tool for withdrawing bolt |
| CN204868750U (en) * | 2015-06-26 | 2015-12-16 | 中国石油天然气股份有限公司 | Nut breaker |
| CN207997095U (en) * | 2017-12-27 | 2018-10-23 | 核动力运行研究所 | A kind of broken cutting tool of round nut |
Non-Patent Citations (1)
| Title |
|---|
| 方俊俊;: "锈蚀螺母快速拆卸工具的研制探讨" * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111805481A (en) * | 2020-07-20 | 2020-10-23 | 中国核动力研究设计院 | Cadmium-storage grid disassembling equipment for second-generation nuclear power station spent fuel |
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| Publication number | Publication date |
|---|---|
| CN109967962B (en) | 2023-08-15 |
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