CN115156584A - Drilling device and method for omega sealing weld of control rod driving mechanism assembly - Google Patents
Drilling device and method for omega sealing weld of control rod driving mechanism assembly Download PDFInfo
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- CN115156584A CN115156584A CN202210800360.4A CN202210800360A CN115156584A CN 115156584 A CN115156584 A CN 115156584A CN 202210800360 A CN202210800360 A CN 202210800360A CN 115156584 A CN115156584 A CN 115156584A
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- 230000007246 mechanism Effects 0.000 title claims abstract description 80
- 238000005553 drilling Methods 0.000 title claims abstract description 70
- 238000007789 sealing Methods 0.000 title claims abstract description 66
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000003466 welding Methods 0.000 claims description 13
- 238000012423 maintenance Methods 0.000 abstract description 26
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract description 16
- 238000012545 processing Methods 0.000 abstract description 16
- 229910052759 nickel Inorganic materials 0.000 abstract description 8
- 230000000712 assembly Effects 0.000 abstract description 4
- 238000000429 assembly Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000005492 weld surfacing Methods 0.000 abstract 1
- 230000008569 process Effects 0.000 description 7
- 230000035515 penetration Effects 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 230000008439 repair process Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000997 High-speed steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000009916 joint effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B41/00—Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B35/00—Methods for boring or drilling, or for working essentially requiring the use of boring or drilling machines; Use of auxiliary equipment in connection with such methods
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B47/00—Constructional features of components specially designed for boring or drilling machines; Accessories therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
- B23Q3/062—Work-clamping means adapted for holding workpieces having a special form or being made from a special material
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The invention discloses a drilling device for preparing exhaust holes in field surfacing maintenance of omega-shaped sealing welds, which aims at meeting the surfacing maintenance requirements of the omega-shaped sealing welds of a reactor control rod driving mechanism assembly. Belongs to the technical field of nuclear power station nuclear island maintenance tools, and particularly relates to a drilling device and method for omega sealing weld joints of control rod driving mechanism assemblies. The device structure is retrencied, light easily carries, satisfies the user demand under the narrow and small environment of control rod drive mechanism, and the device adopts electric drive and manual feed, comprises base, fixture, actuating mechanism and cutter mechanism, realizes that omega sealing weld of nickel base surfacing layer runs through the drilling when omega sealing weld is on-the-spot surfacing maintenance, provides important leading technology for omega sealing weld surfacing maintenance. Practice shows that the device can be used for preparing the exhaust holes of omega sealing weld joints of the M310 control rod driving mechanism component of the Fangjiashan model, and the processing quality meets the drilling requirement of surfacing maintenance.
Description
Technical Field
The invention belongs to the technical field of special tools for maintaining a nuclear island of a nuclear power station, and particularly relates to a drilling device for omega sealing weld joints of a control rod driving mechanism assembly and a method for drilling holes by adopting the drilling device.
Background
The control rod driving mechanism is one of key devices in the operation process of a pressurized water reactor nuclear power station, is a high-precision movable component for controlling the start and stop of a reactor, and is composed of dozens of components with reference to figure 1, wherein the components are distributed on a top cover of a pressure container in a close arrangement mode, and the space environment is narrow. Referring to fig. 2, the total length of a single component of the control rod driving mechanism is about 5000mm, the center distance between the components is 304mm, the minimum distance between the components is 110mm, and referring to fig. 3, three omega sealing weld seams of an upper weld seam, a middle weld seam and a lower weld seam are mainly distributed on each component from top to bottom; the type omega sealing weld belongs to a nuclear safety I-level weld, is positioned on the boundary of a reactor loop, and each section of omega sealing weld is positioned in a component diameter change area.
Point corrosion and stress corrosion easily occur to the omega sealing weld of the control rod driving mechanism assembly, and the joint action of the two corrosions promotes the initiation and extension of cracks to cause the fracture of the omega sealing weld, so that subsequent bad results are caused, and the omega sealing weld needs to be maintained. According to the actual situation, the maintenance mode is different. One of the repair processes is to add a new nickel-based alloy OVERLAY welding layer on an original welding line by OVERLAY OVERLAY welding in an OVERLAY welding repair mode, so as to form a new sealing boundary, achieve the effects of crack arrest and crack extension prevention, and achieve the repair purpose. By adopting the mode, the original omega-shaped sealing welding seam needs to be drilled through to prepare the exhaust hole before surfacing, so that the back-protection gas and water in the part, close to the cavity, of the omega-shaped sealing welding seam are removed, the risk caused by gas expansion in the surfacing process is prevented, and the exhaust hole needs to be perpendicular to the surface of the original omega-shaped sealing welding seam. Because the control rod driving mechanism components are densely arranged, the adjacent distance between the components is small, various interferences are more, the shell of the component can not be damaged, and in addition, the original omega sealing weld is composed of a nickel-based alloy overlaying layer, the hardness is high, the requirements on the hardness of a drill cutter and the stability of a drilling device are high, and the characteristics determine that the omega sealing weld can work in a narrow and complex space around the control rod driving mechanism without interfering with the surrounding components and other shells of the component; meanwhile, the device is in a radioactive environment under the use working condition, and is required to be light, easy to assemble and disassemble, short in time and good in stability. Therefore, special devices need to be designed for drilling the omega seal weld to be repaired.
Therefore, aiming at the surfacing maintenance requirement of the omega-shaped sealing weld of the reactor control rod driving mechanism component, the invention develops an important drilling tool for preparing vent holes during the surfacing maintenance of the omega-shaped sealing weld on site, aims to realize the penetration drilling of the omega-shaped sealing weld of the nickel-based surfacing layer and provides important preposed process equipment for the surfacing maintenance of the omega-shaped sealing weld.
Through retrieval, a foreign patent RU62050U 1A Device For Drilling Circular Holes relates to a Circular hole Drilling Device For nuclear industry, and centering and Drilling are completed through a shell, a Morse taper cutting component, a central arch frame coaxial with the shell and other structures. But the working condition, the processing object and the processing requirement are all different from the invention. Foreign patents US4905777, vise For Producing Drilling Holes from vertical And Drilling With requirement To The Drilling Axis, and US5192846A Drilling Equipment And/Or cutter The Laser Seal Weld Hole Of A furnace Rod relate To a Drilling device, but The object To be processed And The processing requirements are completely different from The present invention. A domestic patent CN107335837A local drilling device in a pipeline relates to a drilling device in the pipeline, wherein the drilling device is moved to a preset position through a transmission flexible shaft, and then drilling is completed. But the processing object and the processing requirement are different from the invention, and the working condition has larger difference. The domestic patent CN210099455U, a device for drilling a cylindrical surface of a cylindrical workpiece, provides a device for drilling a cylindrical surface of a cylindrical workpiece, and the guide hole and the through hole of the cylindrical surface are integrally prepared through a drilling mechanism and a feeding mechanism. The processing purpose and processing technical requirement of the equipment are greatly different from those of the invention. Therefore, no report about omega sealing weld drilling device and method for the control rod driving mechanism assembly related to the invention is found at home and abroad.
Disclosure of Invention
Aiming at the requirements of surfacing maintenance of omega-shaped sealing welds of a reactor control rod driving mechanism assembly, the invention provides a drilling device and a drilling method for the omega-shaped sealing welds of the control rod driving mechanism assembly, which are used as drilling processing tools for preparing exhaust holes during field surfacing maintenance of the omega-shaped sealing welds, and aims to realize penetration drilling of the omega-shaped sealing welds of a nickel-based surfacing layer and provide preposed process equipment for surfacing maintenance of the omega-shaped sealing welds.
In order to achieve the purpose of the invention, the invention is realized by the following technical scheme:
a drilling device for omega sealing weld joints of a control rod driving mechanism assembly comprises a base, a clamping mechanism, a driving mechanism and a cutter mechanism, wherein the base comprises a clamping seat, and the driving mechanism comprises a sliding rail and a sliding table; fixture fixed connection is at the cassette lateral part, and slide rail fixed connection is at the cassette top, and slide rail direction perpendicular to subassembly axis when single subassembly centre gripping is on fixture, slip table sliding connection are on the slide rail, and cutter mechanism installs on the slip table, and cutter mechanism drill bit is radially marchd along the subassembly when single subassembly centre gripping is on fixture. The drilling device for the omega-shaped sealing weld of the control rod driving mechanism assembly is used for performing field maintenance on an original omega-shaped sealing weld of the control rod driving mechanism assembly in a surfacing mode, is used for preparing exhaust holes on the original omega-shaped sealing weld before surfacing, provides a channel for removing moisture and gas in an adjacent cavity in the original omega-shaped sealing weld and provides drilling function support for field surfacing maintenance of the omega-shaped sealing weld of the control rod driving mechanism assembly.
According to the preferable scheme, the clamping mechanism comprises a pin, a locking nut, a buckle and a locking rod, the buckle consists of two semicircular hoops, one hoop is fixedly connected to the side part of the clamping seat, and the direction of the sliding rail is parallel to the plane of the buckle; one end between the two hoops is hinged through a pin and a locking nut, and the other end is connected in a separable mode through a locking rod. Further, the inner diameter of the buckle is 95mm-110mm.
As preferred scheme, actuating mechanism still includes and feeds hand wheel and threaded shaft, and the threaded shaft passes through the thread bush and is connected at axial fixity with the slide rail, and threaded shaft front end and slip table butt feed hand wheel and install in the threaded shaft rear end. Furthermore, the feeding amount is 0.7mm when the feeding hand wheel rotates for one circle.
According to the preferable scheme, the cutter mechanism comprises a rotating motor, a motor support, a connecting rod, a three-jaw drill chuck and a drill, the motor support is fixedly connected to the sliding table, a main body of the rotating motor is installed on the motor support, an output shaft of the rotating motor is connected with the three-jaw drill chuck through the connecting rod, and the drill is installed on the three-jaw drill chuck. Further, the diameter of the drill bit is 0.6mm-6mm. The length of the drill bit is more than 5.5mm.
As preferred scheme, the base still includes box at the bottom of the control, and box installation is in the cassette bottom at the bottom of the control, installs electrical components in the box at the bottom of the control, carries out the electricity with rotating electrical machines and external power source and connects.
The drilling method for the omega sealing weld of the control rod drive mechanism assembly adopts the drilling device for the omega sealing weld of the control rod drive mechanism assembly, and comprises the following steps:
1) Loosening the locking rod and opening the buckle, and placing the single component in the buckle;
2) After the axial position of the adjusting device on the single component is confirmed that the drill cutter is over against the position of the omega-shaped sealing weld to be drilled, the buckle is buckled and locked through the locking rod;
3) Selecting a drill bit with a specific size according to the diameter requirement of a drilled hole, and installing the drill bit on a three-jaw drill bit holder;
4) The power supply is switched on, and the drill bit is driven to rotate by the rotating motor;
5) And the drill cutter is driven to feed towards the direction of the assembly through the feeding hand wheel until the drilling operation is finished.
In summary, compared with the prior art, the invention has the following advantages and beneficial effects: the invention provides a drilling device and method for an omega sealing weld of a control rod driving mechanism assembly, which meet the engineering requirement of preparing vent holes on an original omega sealing weld in a narrow space under the implementation working condition of an overlaying maintenance field of the omega sealing weld of the control rod driving mechanism assembly. The device adopts electric drive, manual mode of feeding, and the centre gripping mode is firm, and the drilling course of working is stable, satisfies sealed welding seam drilling processing requirement.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention.
FIG. 1 is a schematic view of a control rod drive mechanism configuration.
FIG. 2 is a control rod drive mechanism assembly schematic (Square Mount M310).
FIG. 3 is a schematic view of a control rod drive mechanism assembly omega seal weld (Fang Jiashan M310).
FIG. 4 is a schematic diagram of the overall configuration of an embodiment control rod drive mechanism assembly omega seal weld drilling apparatus.
Reference numbers and corresponding part names: the device comprises a control bottom box 1, a clamping seat 2, a sliding rail 3, a sliding table 4, a feeding hand wheel 5, a threaded shaft 6, a rotating motor 7, a motor support 8, a connecting rod 9, a three-jaw drill chuck 10, a drill 11, a pin 12, a locking nut 13, a buckle 14 and a locking rod 15.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more apparent, the following detailed description of the principles, features and the like of the present invention is provided in conjunction with the examples and the accompanying drawings, and the exemplary embodiments and the description thereof are only used for explaining the present invention and are not used to limit the protection scope of the present invention.
The terms used in the present specification are those general terms currently widely used in the art in consideration of functions related to the present disclosure, but they may be changed according to the intention of a person having ordinary skill in the art, precedent, or new technology in the art. Also, specific terms may be selected by the applicant, and in this case, their detailed meanings will be described in the detailed description of the present disclosure. Therefore, the terms used in the specification should not be construed as simple names but based on the meanings of the terms and the overall description of the present disclosure.
Aiming at the requirements of surfacing maintenance of omega-shaped sealing welds of a reactor control rod driving mechanism assembly, the invention provides a drilling device and a drilling method for the omega-shaped sealing welds of the control rod driving mechanism assembly, which are used as drilling processing tools for preparing exhaust holes during field surfacing maintenance of the omega-shaped sealing welds, and aims to realize penetration drilling of the omega-shaped sealing welds of a nickel-based surfacing layer and provide preposed process equipment for surfacing maintenance of the omega-shaped sealing welds. In order to achieve the above object, the present invention is achieved by the following embodiments:
example 1
The embodiment relates to an omega seal weld vent on-site preparation device, in particular to a special auxiliary device for maintaining omega seal welds of control rod drive mechanism assemblies of nuclear power plants. The drilling device for the omega-shaped sealing weld joint of the control rod driving mechanism assembly comprises a base, a clamping mechanism, a driving mechanism and a cutter mechanism, wherein the base comprises a clamping seat 2, and the driving mechanism comprises a sliding rail 3 and a sliding table 4; fixture fixed connection is at 2 lateral parts of cassette, and two slide rails 3 are respectively through 3 sets of screw fixed connection at 2 tops of cassette, 3 direction perpendicular to subassembly axes of slide rail when single subassembly centre gripping is on fixture, 4 sliding connection of slip table are on slide rail 3, cutter mechanism installs on slip table 4, cutter mechanism drill bit radially marchs along the subassembly when single subassembly centre gripping is on fixture for omega sealed weld joint exhaust hole preparation, run through drilling when the on-the-spot build-up welding maintenance.
The drilling device for the omega-shaped sealing weld of the control rod driving mechanism assembly is used for performing field maintenance on an original omega-shaped sealing weld of the control rod driving mechanism assembly in a surfacing mode, is used for preparing exhaust holes on the original omega-shaped sealing weld before surfacing, provides a channel for removing moisture and gas in an adjacent cavity in the original omega-shaped sealing weld and provides drilling function support for field surfacing maintenance of the omega-shaped sealing weld of the control rod driving mechanism assembly.
As an alternative embodiment, as shown in fig. 4, the clamping mechanism includes a pin 12, a lock nut 13, a buckle 14, and a lock rod 15, where the buckle 14 is composed of two semicircular hoops for clamping on the surface of the crdm assembly, where one of the hoops is fixedly connected to the side of the cassette 2, and the direction of the slide rail 3 is parallel to the plane of the buckle 14; one end between the two clamps is hinged through a pin 12 and a locking nut 13, the other end is detachably connected through a locking rod 15, and the clamping mechanism realizes the fastening and the positioning of the device and the component to be processed and effectively ensures that the surface and other parts of the component to be processed are not damaged.
As an alternative embodiment, as shown in fig. 4, the driving mechanism further includes a feeding hand wheel 5 and a threaded shaft 6, the threaded shaft 6 is fixedly connected with the slide rail 3 in the axial direction through a threaded sleeve, the front end of the threaded shaft 6 abuts against the sliding table 4, and the feeding hand wheel 5 is installed at the rear end of the threaded shaft 6.
As an alternative embodiment, as shown in fig. 4, the cutter mechanism includes a rotary motor 7, a motor support 8, a connecting rod 9, a three-jaw drill chuck 10 and a drill 11, the motor support 8 is fixedly connected to the sliding table 4 through a screw, a main body of the rotary motor 7 is mounted on the motor support 8 through a screw, an output shaft of the rotary motor 7 is connected to the three-jaw drill chuck 10 through the connecting rod 9, and the drill 11 is mounted on the three-jaw drill chuck 10 and is designed to be replaceable.
As an alternative embodiment, as shown in fig. 4, the base further includes a control bottom box 1, the control bottom box 1 is installed at the bottom of the card socket 2, and an electrical component is installed in the control bottom box 1 to electrically connect the rotating electrical machine 7 with an external power supply.
The working principle of the device is as follows: 1) All the mechanisms are connected tightly, so that the requirement on rigidity and strength is ensured, and the device is simple, light and compact in mechanism and meets the requirement on field maintenance; 2) Clamping the component to be processed by using the clamping seat 2 and the buckle 14 to realize the fastening of the device; 3) The rotary motor 7 drives the drill 11 to rotate, and the hand-operated feeding hand wheel feeds the drill to realize drilling operation; 4) The feeding speed can be adjusted at any time according to the actual processing condition by adopting a hand-operated feeding mode, and the conditions of cutter breakage, cutter breakage and the like caused by uneven welding seams during constant-speed feeding are avoided.
The performance indexes of the device are as follows: the inner diameter of the buckle 14 is designed to be 95mm-110mm according to the outer diameter of a single component, and the vent hole on the original omega sealing weld of the control rod driving mechanism with the diameter of 95mm-110mm of the component can be prepared under the on-site surfacing maintenance working condition. In addition, the device can adapt to the control rod driving mechanism assembly with a larger pipe diameter range by adopting a mode of replacing the clamping seat 2 and the clamping buckle 14. The device is motor drive, and manual feed, the rotatory a week of feeding hand wheel 5 is 0.7mm, has effectively guaranteed the processing stability. The diameter of the drill 11 is 0.6mm-6mm, and is selected according to the requirement of the outer diameter of the exhaust hole. The length of the drill 11 is more than 5.5mm, and the maximum penetration thickness is 5.5mm. The material of the drill bit is high-speed steel, so that the nickel-based surfacing layer can be effectively drilled.
The test results prove that: the device has the advantages of simple and light structure, complete set of mass of only about 4.3Kg, avoidance of redundant structure, light weight, portability, convenience in carrying and transferring in a low-level environment, convenience in carrying, simplicity in loading, unloading and operation, capability of effectively guaranteeing the use in a field environment and the use requirement of a narrow space of a control rod driving mechanism, capability of meeting the requirement of rapid processing in the low-level environment, stable drilling process, capability of realizing the penetration and drilling of omega-shaped sealing weld joints of nickel-based surfacing layers, and capability of being applied to the surfacing maintenance of the omega-shaped sealing weld joints of control rod driving mechanism assemblies. Practice proves that the device is utilized to complete the preparation of the sealing weld vent hole of the control rod driving mechanism assembly test piece on the M310 model 1:1 integrated test platform, and the processing quality meets the drilling requirement of surfacing maintenance. Meanwhile, the device can also be suitable for preparing the exhaust holes on omega sealing welding seams of control rod drive mechanism assemblies of M310 nuclear power units with the pipe diameters of 95-110 mm.
Example 2
The drilling method for the omega sealing weld of the control rod drive mechanism assembly adopts the drilling device for the omega sealing weld of the control rod drive mechanism assembly in the embodiment 1, and comprises the following steps:
1) Before the sealing device is used, whether all mechanisms are stably connected or not is checked, whether a circuit is normal or not is checked, after the device is confirmed to be intact, pins and nuts on the side of a locking rod 15 are loosened, a buckle 14 is opened, the device is moved to the position near a single assembly and is placed in the buckle 14, and the device is installed at the position near the upper end or the lower end of an omega-shaped sealing weld joint to be processed;
2) After the axial position of the adjusting device on the single component is confirmed that the drill knife 11 is over against the position of the omega-shaped sealing weld to be drilled, the buckle 14 is buckled and locked through the locking rod 15, and the locking rod 15 is rotated for fastening;
3) Selecting a drill bit 11 with a specific size according to the requirement of the diameter of a drilled hole, and installing the drill bit on a three-jaw drill bit chuck 10;
4) The power supply is switched on, and the rotary motor 7 drives the drill knife 11 to rotate;
5) The hand-operated feeding hand wheel 5 drives the drill knife 11 to feed towards the direction of the assembly until the drilling operation is finished; in the manual feeding process, the feeding speed can be adjusted in time according to the processing conditions such as the actual welding line hardness condition and the like.
The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are merely preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The utility model provides a control rod drive mechanism subassembly omega seals welding seam drilling equipment which characterized in that: the cutting machine comprises a base, a clamping mechanism, a driving mechanism and a cutter mechanism, wherein the base comprises a clamping seat (2), and the driving mechanism comprises a sliding rail (3) and a sliding table (4); fixture fixed connection is at cassette (2) lateral part, and slide rail (3) fixed connection is at cassette (2) top, slide rail (3) direction perpendicular to subassembly axis when single subassembly centre gripping is on fixture, and slip table (4) sliding connection is on slide rail (3), and cutter mechanism installs on slip table (4), and cutter mechanism drill bit radially advances along the subassembly when single subassembly centre gripping is on fixture.
2. The crdm assembly omega seal weld drilling apparatus of claim 1, wherein: the clamping mechanism comprises a pin (12), a locking nut (13), a buckle (14) and a locking rod (15), the buckle (14) consists of two semicircular hoops, one hoop is fixedly connected to the side part of the clamping seat (2), and the direction of the sliding rail (3) is parallel to the plane of the buckle (14); one end of each of the two hoops is hinged through a pin (12) and a locking nut (13), and the other end of each of the two hoops is detachably connected through a locking rod (15).
3. The crdm assembly omega seal weld drilling apparatus of claim 2, wherein: the inner diameter of the buckle (14) is 95mm-110mm.
4. The crdm assembly omega seal weld drilling apparatus of claim 2, wherein: the driving mechanism further comprises a feeding hand wheel (5) and a threaded shaft (6), the threaded shaft (6) is fixedly connected with the sliding rail (3) in the axial direction through a threaded sleeve, the front end of the threaded shaft (6) is abutted against the sliding table (4), and the feeding hand wheel (5) is installed at the rear end of the threaded shaft (6).
5. The crdm assembly omega seal weld drilling apparatus of claim 4, wherein: the feeding amount of the feeding hand wheel (5) is 0.7mm after rotating for one circle.
6. The crdm assembly omega seal weld drilling apparatus of claim 4, wherein: the cutter mechanism comprises a rotating motor (7), a motor support (8), a connecting rod (9), a three-jaw drill chuck (10) and a drill (11), the motor support (8) is fixedly connected to the sliding table (4), a main body of the rotating motor (7) is installed on the motor support (8), an output shaft of the rotating motor (7) is connected with the three-jaw drill chuck (10) through the connecting rod (9), and the drill (11) is installed on the three-jaw drill chuck (10).
7. The crdm assembly omega seal weld drilling apparatus of claim 6, wherein: the diameter of the drill (11) is 0.6mm-6mm.
8. The crdm assembly omega seal weld drilling apparatus of claim 6, wherein: the length of the drill (11) is more than 5.5mm.
9. The crdm assembly omega seal weld drilling apparatus of claim 6, wherein: the base further comprises a control bottom box (1), the control bottom box (1) is installed at the bottom of the clamping seat (2), an electrical component is installed in the control bottom box (1), and the rotating motor (7) is electrically connected with an external power supply.
10. A method for drilling an omega seal weld of a CRDM (control rod drive mechanism) assembly, which is characterized by adopting the drilling device of the OMDM assembly of claim 9 to implement the following steps:
1) Releasing the locking lever (15) and opening the catch (14), placing the single assembly in the catch (14);
2) After the axial position of the adjusting device on a single component is confirmed that the drill knife (11) is over against the position of the omega-shaped sealing weld joint to be drilled, the buckle (14) is buckled and locked through the locking rod (15);
3) Selecting a drill (11) with a specific size according to the requirement of the diameter of a drilled hole, and installing the drill on a three-jaw drill chuck (10);
4) The power supply is switched on, and the rotary motor (7) drives the drill (11) to rotate;
5) The drill (11) is driven by the feeding hand wheel (5) to feed towards the direction of the assembly until the drilling operation is finished.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210800360.4A CN115156584A (en) | 2022-07-08 | 2022-07-08 | Drilling device and method for omega sealing weld of control rod driving mechanism assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210800360.4A CN115156584A (en) | 2022-07-08 | 2022-07-08 | Drilling device and method for omega sealing weld of control rod driving mechanism assembly |
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| CN115156584A true CN115156584A (en) | 2022-10-11 |
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| CN202210800360.4A Pending CN115156584A (en) | 2022-07-08 | 2022-07-08 | Drilling device and method for omega sealing weld of control rod driving mechanism assembly |
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| CN205869529U (en) * | 2016-07-29 | 2017-01-11 | 湖北精工钢结构有限公司 | Fixed frock of pipe drilling |
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| CN210099455U (en) * | 2019-01-18 | 2020-02-21 | 深圳市高晟智能装备有限公司 | Device for drilling cylindrical surface of cylindrical workpiece |
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| CN216096552U (en) * | 2021-11-29 | 2022-03-22 | 刘平 | Indoor gas pipeline ventilation tapping device |
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