CN107009198A - Nuclear island primary device part chromium coating method for grinding - Google Patents
Nuclear island primary device part chromium coating method for grinding Download PDFInfo
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- CN107009198A CN107009198A CN201710251361.7A CN201710251361A CN107009198A CN 107009198 A CN107009198 A CN 107009198A CN 201710251361 A CN201710251361 A CN 201710251361A CN 107009198 A CN107009198 A CN 107009198A
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- Prior art keywords
- grinding
- carried out
- primary device
- coating
- rubbing down
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The present invention relates to nuclear island primary device method of processing parts technical field, a kind of nuclear island primary device part chromium coating method for grinding is disclosed, is comprised the following steps：（1）Chromium plating process is carried out to the surface to be plated of part；（2）Dimensional gaughing is carried out on request to chrome-plated part, thickness of coating is determined；（3）Grinding is carried out to the part coating of passed examination；（4）Dimensional gaughing is carried out on request to chrome-plated part；（5）To carrying out PT inspections through the qualified part coating of dimensional gaughing；（6）To checking that underproof part coating carries out rubbing down processing through PT；（7）PT inspections are carried out to the coating after rubbing down；（8）Dimensional gaughing is carried out to the part of PT passed examinations；（9）Underproof part, which repeats step, to be checked to PT（6）And step（7）, until carrying out step after PT passed examinations, PT passed examinations（8）.The present invention improves the qualification rate of PT inspections, solves the problem of PT passed examination rates are low after the grinding of nuclear island primary device part chromium coating.
Description
Technical field
The present invention relates to nuclear island primary device method of processing parts technical field, particularly a kind of nuclear island primary device part chromium plating
Layer method for grinding.
Background technology
The part of nuclear island primary device is in high temperature, the operating mode of high pressure, in order to ensure the service life of such part,
Needing wear-resisting plating hard chromium on surface.Compared with other requirements of non-core industry to chrome plating inspection, nuclear island primary device is to chromium plating
The inspection of layer proposes higher requirement, and it requires to carry out dye penetrating inspection to chromium coating（Referred to as " PT inspections "）, other rows
Industry does not require that acceptance criteria is red display can not occur, and such part is plated to chromium coating progress dye penetrating inspection
Easily there is red display after layers of chrome grinding.
Step, chamfering, edge are easily accumulated at these positions and plated due to point discharge or marginal discharge effect during chromium plating
Layer, or even there are the defects such as burr.In chromium coating Grinding Process, if these coating accumulation position grinding depth does not conform to
Reason, is easy for causing stress concentration at these positions, so that cause the generation of face crack, the position when subsequent PT is checked
There is red display.When being ground chromium coating, the emery wheel such as selected is mismatched with chromium coating performance, or grinding depth is not enough closed
Reason, coating surface roughness is not up to defined requirement after grinding, and even chatter mark occurs in part coating surface regional area, sternly
It can feed through to whole electroplating surface during weight, red display occurs when subsequent PT is checked and causes PT inspections unqualified.To having
When the position of display carries out rubbing down, such as rubbing down mode is unreasonable, and regional area causes crackle to produce due to undue rubbing down, seriously
When coating can be caused to come off.
The content of the invention
The invention aims to solve above-mentioned technical problem, there is provided a kind of nuclear island primary device part chromium coating grinding side
Method, makes chromium coating flawless, is come off without chatter mark, nothing, surface roughness reaches regulation requirement, qualification rate is high when PT is checked.
The present invention is adopted the technical scheme that：
A kind of nuclear island primary device part chromium coating method for grinding, it is characterized in that, comprise the following steps：
（1）Chromium plating process is carried out to the surface to be plated of part；
（2）Dimensional gaughing is carried out on request to chrome-plated part, thickness of coating is determined；
（3）Grinding is carried out to the part coating of passed examination；
（4）Dimensional gaughing is carried out on request to chrome-plated part；
（5）To carrying out PT inspections through the qualified part coating of dimensional gaughing；
（6）To checking that underproof part coating carries out rubbing down processing through PT；
（7）PT inspections are carried out to the coating after rubbing down；
（8）Dimensional gaughing is carried out to the part of PT passed examinations；
（9）Underproof part, which repeats step, to be checked to PT（6）And step（7）, until PT passed examinations, PT passed examinations
After carry out step（8）.
Further, all visually inspected between the dimensional gaughing.
Further,：The piece surface is cylindrical, plane or the endoporus by Central of the parts line, described the（3）In step
The equipment that grinding is used is grinding machine, and the instrument used is emery wheel, and the abrasive grain of emery wheel is 30#~120#, during grinding
Grinding depth is：Grinding depth is 0.01~0.02mm during roughing, is finished when surplus remains 0.02~0.03mm, is finished
Grinding depth is 0.002~0.005mm, is ground to after given size emery wheel without cutting depth null several times.
Further, the piece surface is endoporus, and the endoporus is without Central of the parts line, described the（3）It is ground in step
It is honing machine to process the equipment used, and the instrument used is hone stone, is roughly ground first using the thicker hone stone of granularity, when
When surplus remains 0.02~0.03mm, half fine grinding is carried out to 0.01mm surpluses using the thinner hone stone of granularity, finally using the thin top gem of a girdle-pendant
Abrasive stick is refined to given size, needs to overturn part repeatedly to reduce hole taper in half fine grinding and lapping process.
Further, the piece surface is cylindrical, and described the（6）Rubbing down in step uses rubbing down, rubbing down work on lathe
Have for sand paper or emery cloth bistrique, the abrasive grain of sand paper or emery cloth bistrique is narrower than 100 mesh.
Further, the piece surface is for plane, the endoporus by Central of the parts line or without in Central of the parts line
Hole, described（6）Rubbing down in step uses the rubbing down on pincers bed, and rubbing down instrument is sand paper or emery cloth bistrique, and sand paper or emery cloth are ground
The abrasive grain of head is narrower than 100 mesh.
The beneficial effects of the invention are as follows：
Rubbing down when emery wheel abrasive grain, wheel grinding parameter during by being ground to chromium coating, honing after grinding parameter, grinding
Mode and rubbing down parameter carry out reasonable selection and strictly controlled, and eliminate the crackle and obscission of chromium coating, improve plating
The roughness of layer surface, improves the qualification rate of PT inspections, solves PT after the grinding of nuclear island primary device part chromium coating and checks conjunction
The problem of lattice rate is low.
Embodiment
The embodiment to nuclear island primary device part chromium coating method for grinding of the present invention elaborates below.
Nuclear island primary device part chromium coating method for grinding comprises the following steps：
（1）Chromium plating：Size is remembered before plating by drawing regulation progress chromium plating process on surface to be plated to examining qualified parts
Record.
（2）Visual inspection and dimensional gaughing：Chrome-plated part is visually inspected and dimensional gaughing on request, purpose is true
Determine thickness of coating.
（3）Grinding：Grinding is carried out to the part coating of passed examination.
（4）Visual inspection and dimensional gaughing：Chrome-plated part is visually inspected and dimensional gaughing on request.
（5）PT is checked：To carrying out PT inspections through the qualified part coating of visual inspection and dimensional gaughing.
（6）To checking that underproof part coating carries out rubbing down processing through PT.
（7）PT inspections are carried out to the coating after rubbing down.
（8）The part qualified to the PT after rubbing down is visually inspected and dimensional gaughing.
（9）Underproof part, which repeats step, to be checked to PT（6）And step（7）, until PT passed examinations, PT is checked
Step is carried out after qualified（8）.
Above-mentioned steps（3）In, when the grinding position of part is cylindrical, plane or the endoporus by Central of the parts line, grinding
It is grinding machine to process the equipment used, and the instrument used is emery wheel, and the abrasive grain of emery wheel is 30#~120#.Grinding during grinding
Depth is：Grinding depth is 0.01~0.02mm during roughing, is finished when surplus remains 0.02~0.03mm, finishing grinding
Depth is 0.002~0.005mm, is ground to after given size emery wheel without cutting depth null several times.
Above-mentioned steps（3）In, inner hole grinding（Without Central of the parts line）When, the equipment that grinding is used is honing
Machine, the instrument used is hone stone, is roughly ground first using the thicker hone stone of granularity, when surplus remains 0.02~0.03mm
When, half fine grinding is carried out to 0.01mm surpluses using the thinner hone stone of granularity, finally refined using thin hone stone to given size,
Need to overturn part repeatedly to reduce hole taper in half fine grinding and lapping process.
Above-mentioned steps（6）In cylindrical rubbing down use the rubbing down on lathe, rubbing down instrument is sand paper or emery cloth bistrique, sand paper
Or the abrasive grain of emery cloth bistrique is narrower than 100 mesh.Plane and endoporus using pincers bed on rubbing down, rubbing down instrument be sand paper or
The abrasive grain of emery cloth bistrique, sand paper or emery cloth bistrique is narrower than 100 mesh.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
Member, under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be regarded as
Protection scope of the present invention.
Claims (6)
1. a kind of nuclear island primary device part chromium coating method for grinding, it is characterised in that：Comprise the following steps：
（1）Chromium plating process is carried out to the surface to be plated of part；
（2）Dimensional gaughing is carried out on request to chrome-plated part, thickness of coating is determined；
（3）Grinding is carried out to the part coating of passed examination；
（4）Dimensional gaughing is carried out on request to chrome-plated part；
（5）To carrying out PT inspections through the qualified part coating of dimensional gaughing；
（6）To checking that underproof part coating carries out rubbing down processing through PT；
（7）PT inspections are carried out to the coating after rubbing down；
（8）Dimensional gaughing is carried out to the part of PT passed examinations；
（9）Underproof part, which repeats step, to be checked to PT（6）And step（7）, until PT passed examinations, PT passed examinations
After carry out step（8）.
2. nuclear island primary device part chromium coating method for grinding according to claim 1, it is characterised in that：The dimensional gaughing
Between all visually inspected.
3. nuclear island primary device part chromium coating method for grinding according to claim 1 or 2, it is characterised in that：The part
Surface is cylindrical, plane or the endoporus by Central of the parts line, described the（3）The equipment that grinding is used in step is grinding machine,
The instrument used is emery wheel, and the abrasive grain of emery wheel is 30#~120#, and grinding depth during grinding is：It is ground during roughing deep
Spend for 0.01~0.02mm, finished when surplus remains 0.02~0.03mm, finishing grinding depth is 0.002~0.005mm,
Emery wheel is ground to after given size without cutting depth null several times.
4. nuclear island primary device part chromium coating method for grinding according to claim 1 or 2, it is characterised in that：The part
Surface is endoporus, and the endoporus is without Central of the parts line, described（3）The equipment that grinding is used in step is honing machine,
The instrument used is hone stone, is roughly ground first using the thicker hone stone of granularity, when surplus remains 0.02~0.03mm, is adopted
Half fine grinding is carried out with the thinner hone stone of granularity to 0.01mm surpluses, is finally refined using thin hone stone to given size, half essence
Need to overturn part repeatedly to reduce hole taper in mill and lapping process.
5. nuclear island primary device part chromium coating method for grinding according to claim 1 or 2, it is characterised in that：The part
Surface is cylindrical, and described the（6）Rubbing down in step uses the rubbing down on lathe, and rubbing down instrument is sand paper or emery cloth bistrique, sand paper
Or the abrasive grain of emery cloth bistrique is narrower than 100 mesh.
6. nuclear island primary device part chromium coating method for grinding according to claim 1 or 2, it is characterised in that：The part
Surface is plane, the endoporus by Central of the parts line or the endoporus without Central of the parts line, described the（6）Rubbing down in step
Using the rubbing down on pincers bed, rubbing down instrument is sand paper or emery cloth bistrique, and the abrasive grain of sand paper or emery cloth bistrique is narrower than 100 mesh.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710251361.7A CN107009198A (en) | 2017-04-18 | 2017-04-18 | Nuclear island primary device part chromium coating method for grinding |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710251361.7A CN107009198A (en) | 2017-04-18 | 2017-04-18 | Nuclear island primary device part chromium coating method for grinding |
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| CN107009198A true CN107009198A (en) | 2017-08-04 |
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| CN201710251361.7A Pending CN107009198A (en) | 2017-04-18 | 2017-04-18 | Nuclear island primary device part chromium coating method for grinding |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110480424A (en) * | 2019-08-13 | 2019-11-22 | 中国航空工业集团公司西安飞行自动控制研究所 | Process for actuator pistons HVOF strengthening surface finishing |
| CN111805305A (en) * | 2019-11-29 | 2020-10-23 | 中国航发沈阳黎明航空发动机有限责任公司 | Method for machining part with deep hole chromium layer |
| CN112192458A (en) * | 2020-09-28 | 2021-01-08 | 中国航发贵州黎阳航空动力有限公司 | Processing method for roughness of liner after chromium plating and polishing wheel |
| CN115213754A (en) * | 2022-06-23 | 2022-10-21 | 鹰普航空科技有限公司 | Chromium plating blind hole machining process |
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| US3962834A (en) * | 1974-09-16 | 1976-06-15 | Van Der Horst Corporation Of America | Method of producing a pitted, porous electrodeposited chromium coating |
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| CN103276418A (en) * | 2013-06-09 | 2013-09-04 | 东方电气集团东方汽轮机有限公司 | Guiding key of nuclear control rod drive device and surface processing method thereof |
| CN104746110A (en) * | 2013-12-27 | 2015-07-01 | 沈阳鼓风机集团核电泵业有限公司 | Stainless steel fastener screw thread surface chrome plating technology used for nuclear main pump |
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2017
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| US3962834A (en) * | 1974-09-16 | 1976-06-15 | Van Der Horst Corporation Of America | Method of producing a pitted, porous electrodeposited chromium coating |
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| CN103276418A (en) * | 2013-06-09 | 2013-09-04 | 东方电气集团东方汽轮机有限公司 | Guiding key of nuclear control rod drive device and surface processing method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110480424A (en) * | 2019-08-13 | 2019-11-22 | 中国航空工业集团公司西安飞行自动控制研究所 | Process for actuator pistons HVOF strengthening surface finishing |
| CN111805305A (en) * | 2019-11-29 | 2020-10-23 | 中国航发沈阳黎明航空发动机有限责任公司 | Method for machining part with deep hole chromium layer |
| CN112192458A (en) * | 2020-09-28 | 2021-01-08 | 中国航发贵州黎阳航空动力有限公司 | Processing method for roughness of liner after chromium plating and polishing wheel |
| CN115213754A (en) * | 2022-06-23 | 2022-10-21 | 鹰普航空科技有限公司 | Chromium plating blind hole machining process |
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Application publication date: 20170804 |
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