CN104928736B - Rear shaft neck inner headed face chromium plating restorative procedure - Google Patents
Rear shaft neck inner headed face chromium plating restorative procedure Download PDFInfo
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- CN104928736B CN104928736B CN201510309981.2A CN201510309981A CN104928736B CN 104928736 B CN104928736 B CN 104928736B CN 201510309981 A CN201510309981 A CN 201510309981A CN 104928736 B CN104928736 B CN 104928736B
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Abstract
The invention provides a kind of rear shaft neck inner headed face chromium plating restorative procedure and fixture, the middle part of the rear shaft neck has an inner headed face for needing chromium plating reparation, has a top inner headed face above the inner headed face and the bottom inner headed face below the inner headed face close to the inner headed face；The fixture includes lower screen board made of upper screen board made of the plastics to match with top inner headed face size and the plastics to match with bottom inner headed face size；Upper screen board has a central through hole passed through for anode rod；Lower screen board has a central blind hole that its bottom is withstood for anode rod.The fixture that the present invention passes through offer; rear shaft neck can be firmly fixed; rear shaft neck change in location is avoided to cause thickness of coating uneven; quickly the part covering protection without chromium plating reparation can be got up with very convenient using fixture simultaneously; reduce the protection workloads such as japanning, patch sheet lead; operating efficiency is improved, shortens repairing efficiency.
Description
Technical field
The present invention relates to the chromium plating restorative procedure after a kind of aerial motor spare part in process dimension overproof and
Fixture, it is related to local chromium plating protecting tool set-up structure and the chromium plating technology of stainless steel parts, more particularly to one kind is used for aeroplane engine
The rear shaft neck inner headed face chromium plating restorative procedure and fixture of machine.
Background technology
Rear shaft neck is to ensure the strength member of aero-engine safe and stable operation, and a kind of aeroplane engine is shown in Fig. 1
The dimensional structure diagram of the rear shaft neck of machine, in order to meet the high intensity of aviation field, light-weighted design requirement, rear shaft neck is more
It is made of stainless steel.Rear shaft neck shown in Fig. 1 is that a kind of shape and structure is complicated, and the relatively thin disk axial workpiece of wall thickness, it processes work
Skill is complicated, is often in the presence of dimension overproof in machining process, because repair difficulty it is big scrap processing then loss due to spoiled work
It is very big, and waste process time.
The dimension discrepancy for taking the method reparation part of chromium plating reparation is a kind of common technology, but for repairing Fig. 1 institutes
For the inner circle size in the rear shaft neck centre position shown, because rear shaft neck inner headed face needs the inner headed face region of chromium plating positioned at centre
Position, thus for the part of no dimension overproof, such as inner headed face overlying regions and lower zone of chromium plating etc. are needed, all
Need to protect.And the protected mode workload such as common japanning, patch sheet lead is very big, due to needing area to be protected to be much larger than
The periphery of chromium plating reparation is needed, causes the chromium plating repairing efficiency of rear shaft neck to be thus extended considerably, efficiency is very low, and cost is very
It is high.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of rear shaft neck inner headed face chromium plating restorative procedure and fixture, to reduce
Or the problem of avoiding being formerly mentioned.
In order to solve the above technical problems, the present invention proposes a kind of rear shaft neck inner headed face chromium plating restorative procedure, the rear axle
For neck in the bell mouth shape structure that bottom is small, top becomes larger, the middle part of the rear shaft neck, which has one, needs chromium plating reparation
Inner headed face, the inner headed face have the first diameter；There is the top above the inner headed face close to the inner headed face
Inner headed face and the bottom inner headed face below the inner headed face；The top inner headed face has more than first diameter
Second bobbin diameter, the bottom inner headed face have the 3rd diameter less than first diameter, and the restorative procedure includes following step
Suddenly：1) rear shaft neck is heated and eliminates stress；2) fixture is provided, the fixture includes one and the top inner headed face
Under made of upper screen board made of the plastics that size matches and the plastics to match with the bottom inner headed face size
Screen board；The upper screen board has a central through hole passed through for anode rod, and the central through hole is provided with multiple power supplies
The top plating fluid apertures that plating solution flows through；The lower screen board has a central blind hole that its bottom is withstood for anode rod, around institute
State central blind hole and be provided with the bottom plating fluid apertures that multiple power supply plating solutions flow through；The lower screen board is stuck in the bottom inner headed face
On, the upper screen board is stuck on the top inner headed face；3) electrochemical deoiling is carried out to the rear shaft neck and is cleaned；4) by described in
Rear shaft neck is put into chrome-plating bath together with the fixture；Anodic attack is first carried out, anodic attack electric current is 3A~3.75A, and anode is rotten
The erosion time is 15s~30s；Then punching electricity is opened, it is 6A~18A to rush electric current, and it is 1min-3min to rush the electric time；Then again progressively
Electric current is down to operating current 3A~9A and starts chromium plating, chromium plating temperature is 50 DEG C~60 DEG C, the chromium plating time：4-6 hours；5) remove
Hydrogen：Dehydrogenation in 10 hours after plating.
Preferably, in the step 1, the heating-up temperature that heating eliminates stress is 190 ± 10 DEG C, the heat time >=3h.
Preferably, in the step 3, except oil temperature is 70 DEG C~90 DEG C, the oil removing time is 5min~30min.
Preferably, the rear shaft neck is cleaned with flowing warm water and flowing cool water respectively in the step 3, after oil removing and done
Only；Wherein the temperature of flowing warm water is 40 DEG C~70 DEG C, and the scavenging period of flowing warm water is 1min~3min；The temperature of flowing cool water
Spend for room temperature, the scavenging period of flowing cool water is 1min~3min.
Preferably, in the step 3, the moisture film on the rear shaft neck surface keeps connecting in 30s planted agent after flowing cool water cleaning
It is continuous not break.
Preferably, in the step 5, dehydrogenation temperature is 190 DEG C ± 10 DEG C, the dehydrogenation time >=3h.
Repair fixture present invention also offers a kind of rear shaft neck inner headed face chromium plating, the rear shaft neck in bottom is small, top by
The big bell mouth shape structure of gradual change, the middle part of the rear shaft neck have an inner headed face for needing chromium plating reparation, the inner headed face
With the first diameter；There is a top inner headed face above the inner headed face and positioned at described close to the inner headed face
Bottom inner headed face below inner headed face；The top inner headed face has the Second bobbin diameter more than first diameter, the bottom
Inner headed face has the 3rd diameter less than first diameter；Characterized in that, the fixture is included in one and the top
Upper screen board and the plastics to match with the bottom inner headed face size are made made of the plastics that disc size matches
Lower screen board；The upper screen board has a central through hole passed through for anode rod, is provided with around the central through hole multiple
The top plating fluid apertures that power supply plating solution flows through；The lower screen board has a central blind hole that its bottom is withstood for anode rod, encloses
The central blind hole is provided with multiple bottoms for flowing through of power supply plating solutions and electroplates fluid apertures.
Preferably, the cylindrical setting chamfering in the lower end of the upper screen board.
Preferably, the cylindrical setting flange in the upper end of the lower screen board, the outside diameter of the flange are straight more than the described 3rd
Footpath and it is less than first diameter.
In the rear shaft neck inner headed face chromium plating restorative procedure of the present invention, there is provided a fixture, can be by after by the fixture
Axle journal firmly fixes, and avoids rear shaft neck change in location from causing thickness of coating uneven, while convenient and swift using fixture
Ground gets up the part covering protection without chromium plating reparation, reduces the protection workloads such as japanning, patch sheet lead, improves work effect
Rate, shorten repairing efficiency.
Brief description of the drawings
The following drawings is only intended to, in doing schematic illustration and explanation to the present invention, not delimit the scope of the invention.Wherein,
A kind of dimensional structure diagram of the rear shaft neck of aero-engine is shown in Fig. 1；
The different visual angles of the upper screen board of the fixture of a specific embodiment according to the present invention are shown in Fig. 2 a, 2b respectively
Dimensional structure diagram；
The difference that the lower screen board of the fixture of another specific embodiment according to the present invention is shown in Fig. 3 a, 3b respectively regards
The dimensional structure diagram at angle；
The fixture that the present invention is shown in Fig. 4 is installed to structural representation when in rear shaft neck.
Embodiment
In order to which technical characteristic, purpose and the effect of the present invention is more clearly understood, now control illustrates this hair
Bright embodiment.Wherein, identical part uses identical label.
As described in background of invention part, after a kind of rear shaft neck 1 available for shown in Fig. 1
Axle journal inner headed face chromium plating restorative procedure.Specifically, Fig. 1 is shown a kind of stereochemical structure of the rear shaft neck of aero-engine and shown
Be intended to, wherein, the rear shaft neck 1 in the bell mouth shape structure that bottom is small, top becomes larger, wherein, after showing this in Fig. 4
The partial sectional view of axle journal 1, from Fig. 1 and Fig. 4, the middle part of rear shaft neck 1 has an inner headed face 11 for needing chromium plating reparation,
The inner headed face 11 has the first diameter；There is one in the top of the top of inner headed face 11 close to the inner headed face 11
Disc 12 and the bottom inner headed face 13 positioned at the lower section of inner headed face 11；The top inner headed face 12, which has, is more than described first
The Second bobbin diameter of diameter, the bottom inner headed face 13 have the 3rd diameter less than first diameter, in a specific implementation
In example, the size requirement of the periphery 11 is Φ 79.9mm.
It can be seen that restorative procedure of the invention needs to carry out chromium plating process to the inner circle size in rear shaft neck centre position, in order to
Obtain good quality of coating, it is necessary first to processing is fixed to rear shaft neck 1, avoids the change in location of rear shaft neck 1 from causing coating
It is in uneven thickness, while also need to being protected without the part of chromium plating reparation, such as the top inner headed face 12 without chromium plating
It is required for protecting with bottom inner headed face 13.
To realize above-mentioned target, the rear shaft neck inner headed face chromium plating restorative procedure of the present invention is carried out specifically step by step below
It is bright.
1) grinding stress is eliminated firstly, it is necessary to be heated to rear shaft neck 1, to ensure binding force of cladding material, wherein, eliminate stress
Heating-up temperature is 190 ± 10 DEG C, the heat time >=3h.
2) then need provide a fixture 2, rear shaft neck 1 is fixed, at the same by fixture 2 by rear shaft neck 1 not
The top inner headed face 12 and bottom inner headed face 13 for needing chromium plating protect.
Wherein, fixture 2 includes upper (Fig. 2 a- of screen board 22 made of the plastics to match with the size of top inner headed face 12
2b), lower screen board 23 (Fig. 3 a-3b) made of the plastics to match with the size of bottom inner headed face 13.The each several part of fixture 2
Structure referring to Fig. 2-3, wherein, Fig. 2 a, 2b be shown respectively according to the present invention a specific embodiment fixture upper screen
The dimensional structure diagram of the different visual angles of plate；Another specific embodiment according to the present invention is shown in Fig. 3 a, 3b respectively
Fixture lower screen board different visual angles dimensional structure diagram.
Referring to Fig. 2 a, 2b, upper screen board 22 has a central through hole 221 passed through for anode rod 25 (Fig. 4), around center
Through hole 221 is provided with the top plating fluid apertures 222 that multiple power supply plating solutions flow through.Referring to Fig. 3 a, 3b, lower screen board 23 has a confession
Anode rod 25 withstands the central blind hole 231 of its bottom, around central blind hole 231 be provided with it is multiple power supply plating solutions flow through bottom electricity
Plate fluid apertures 232.
After providing fixture 2, the lower screen board 23 of fixture 2 is stuck on bottom inner headed face 13 first, then upper screen board 22
It is stuck on top inner headed face 12, the fixture that the present invention is shown in wherein Fig. 4 is installed to structural representation when in rear shaft neck.Ginseng
See Fig. 4, when installs fixture 2, the central blind hole 231 that lower screen board 23 can be withstood by anode rod 25 fills in lower screen board 23
Position where bottom inner headed face 13, then makes the central through hole 221 of screen board 22 wear on anode rod 25, makes screen board 22
Position where being slipped to top inner headed face 13 along anode rod 25.The one side of central blind hole 231 of lower screen board 23 can provide
Anode rod 25 is withstood the structure of lower pressure screen board 23, on the other hand can be positioned anode rod 25 so that anode rod 25
The electric field for plating only is obtained in the top of central blind hole 231, and the lower end of central blind hole 231 is shielded, thus electroplate
During without design of part below the lower screen board 23 being immersed in electroplate liquid take covering shielding measure, improve work
Efficiency.
Specifically, it is by the lower He of screen board 23 by the step that lower screen board 23 and upper screen board 22 are stuck in inside rear shaft neck 1
The size of upper screen board 22 is realized.For example, because the size of lower screen board 23 matches with the size of bottom inner headed face 13, so that
Screen board 23 must be descended to fall into the regional extent of bottom inner headed face 13, and extra buckle structure can be set to make lower screen board
23 will not slip down from bottom inner headed face 13, in a specific embodiment, can be in the cylindrical setting in upper end of lower screen board 23
Flange 233, setting makes the outside diameter of flange 233 be more than the 3rd diameter and is less than the first diameter.
For another example, the size of upper screen board 22 matches with the size of top inner headed face 12, so that upper screen board 22 can fall
In the regional extent for entering top inner headed face 12, and because the Second bobbin diameter of top inner headed face 12 is more than the inner headed face 11 to be repaired
The first diameter, therefore the diameter of upper screen board 22 is also greater than the first diameter, so as to by the first diameter and Second bobbin diameter it
Between the hierarchic structure that is formed upper screen board 22 is blocked to the region model for making it be not to be slipped to inner headed face 11 from top inner headed face 12
Enclose.Because the ladder of self-assembling formation between the first diameter and Second bobbin diameter provides the structure of the upper positioning of screen board 22, therefore need not
Flange similar on lower screen board 23 is set.In a specific embodiment, the upper screen board 22 and lower screen board 23 are from than great
In the plastics of electroplate liquid, to avoid fixture from floating after immersing electroplate liquid.In another specific embodiment, the lower end of upper screen board 22
It is cylindrical to be provided with chamfering 223, for making the stairstepping of self-assembling formation between upper screen board 22 and above-mentioned first diameter and Second bobbin diameter
Into more preferable fitting, to protect the top inner headed face 12 without chromium plating.
3) it is mounted with after fixture 2, to being mounted with that the rear shaft neck 1 of fixture 2 carries out electrochemical deoiling.Such as thermokalite can be utilized
Saponification and emulsification of the solution to grease, piece surface greasy dirt is removed.Specifically, sodium hydroxide, carbonic acid can be utilized
The alkaline matter of sodium etc plays saponification；Emulsification is played using the surfactant of such as sodium phosphate, sodium metasilicate etc to remove
Remove not saponifiable oil.
In a specific embodiment, electrochemical deoiling temperature is 70 DEG C~90 DEG C, and the oil removing time is 5min~30min；Remove
Rear shaft neck 1 is cleaned up with flowing warm water and flowing cool water respectively after oil；Wherein the temperature of flowing warm water is 40 DEG C~70 DEG C,
The scavenging period of flowing warm water is 1min~3min；The temperature of flowing cool water is room temperature, and the scavenging period of flowing cool water is 1min
~3min；The moisture film on the surface of rear shaft neck 1 keeps not breaking continuously in 30s planted agent after flowing cool water cleaning.
4) after, rear shaft neck 1 is put into chrome-plating bath together with fixture 2；Anodic attack is first carried out, i.e., by rear shaft neck 1 or folder
Tool 2 is connected with positive source, and the positive plate in coating bath is connected with power cathode, part is become anode, and positive plate becomes cloudy
Pole.This step plays piece surface activation, in order to the electroplating operations of next step by opening anti-electricity.
In a specific embodiment, anodic attack electric current is 3A~3.75A, and the anodic attack time is 15s~30s.
Then punching electricity is opened, it is 6A~18A to rush electric current, and it is 1min-3min to rush the electric time.In this step, in anodic attack
By the connection back switching of electrode after end, i.e., rear shaft neck 1 or fixture 2 are connected with power cathode, the positive plate in coating bath
It is connected with positive source, strike plating is carried out with high current.
And then electric current is progressively down to operating current 3A~9A and starts normal chromium plating, the connection of electrode reversely with impact
Identical during plating, chromium plating temperature is 50 DEG C~60 DEG C, the chromium plating time：4-6 hours.
In a specific embodiment, size is Φ 80.075 before the plating for the inner headed face 11 for needing chromium plating is controlled before chromium plating
~Φ 80.041mm, it is Φ 79.9mm to correct required inner circle size by polishing after plating.
5) it is finally dehydrogenation：Dehydrogenation in 10 hours after plating, remove piece surface in electroplating process and ooze hydrogen, by temperature control
Heating mode is realized in dehydrogenation stove.Dehydrogenation temperature is 190 DEG C ± 10 DEG C, the dehydrogenation time >=3h.
In the rear shaft neck inner headed face chromium plating restorative procedure of the present invention, there is provided a fixture, can be by after by the fixture
Axle journal firmly fixes, and avoids rear shaft neck change in location from causing thickness of coating uneven, while convenient and swift using fixture
Ground gets up the part covering protection without chromium plating reparation, reduces the protection workloads such as japanning, patch sheet lead, improves work effect
Rate, shorten repairing efficiency.
It will be appreciated by those skilled in the art that although the present invention is described in the way of multiple embodiments,
It is that not each embodiment only includes an independent technical scheme.So narration is used for the purpose of for the sake of understanding in specification,
The skilled in the art should refer to the specification as a whole is understood, and by technical scheme involved in each embodiment
The modes of different embodiments can be mutually combined into understand protection scope of the present invention by regarding as.
The schematical embodiment of the present invention is the foregoing is only, is not limited to the scope of the present invention.It is any
Those skilled in the art, equivalent variations, modification and the combination made on the premise of the design of the present invention and principle is not departed from,
The scope of protection of the invention all should be belonged to.
Claims (6)
1. a kind of rear shaft neck inner headed face chromium plating restorative procedure, the rear shaft neck (1) is in the horn mouth that bottom is small, top becomes larger
Shape structure, the middle part of the rear shaft neck (1) have an inner headed face (11) for needing chromium plating reparation, and the inner headed face (11) has
First diameter；Close to the inner headed face (11) have a top inner headed face (12) above the inner headed face (11) and
Bottom inner headed face (13) below the inner headed face (11)；The top inner headed face (12), which has, is more than first diameter
Second bobbin diameter, the bottom inner headed face (13) have less than first diameter the 3rd diameter, it is characterised in that it is described to repair
Compound method comprises the following steps：
1) rear shaft neck (1) is heated and eliminates stress；
2) fixture (2) is provided, the fixture (2) includes the plastics to match with top inner headed face (12) size
Lower screen board (23) made of manufactured upper screen board (22) and the plastics to match with bottom inner headed face (13) size；
The upper screen board (22) has a central through hole (221) passed through for anode rod (25), is set around the central through hole (221)
It is equipped with the top plating fluid apertures (222) that multiple power supply plating solutions flow through；The lower screen board (23) has one for anode rod (25) top
The firmly central blind hole (231) of its bottom, around the central blind hole (231) be provided with it is multiple power supply plating solutions flow through bottom plating
Fluid apertures (232)；The lower screen board (23) is stuck on the bottom inner headed face (13), the upper screen board (22) is stuck on described
On portion's inner headed face (12)；
3) electrochemical deoiling is carried out to the rear shaft neck (1) and is cleaned；
4) rear shaft neck (1) is put into chrome-plating bath together with the fixture (2)；First carry out anodic attack, anodic attack electric current
For 3A~3.75A, the anodic attack time is 15s~30s；Then punching electricity is opened, it is 6A~18A to rush electric current, rushes the electric time and is
1min-3min；Then electric current is progressively down to operating current 3A~9A again and starts chromium plating, chromium plating temperature is 50 DEG C~60 DEG C, plating
The chromium time：4-6 hours；
5) dehydrogenation：Dehydrogenation in 10 hours after plating.
2. the method as described in claim 1, it is characterised in that in the step 1, the heating-up temperature that heating eliminates stress is
190 ± 10 DEG C, the heat time >=3h.
3. the method as described in claim 1, it is characterised in that in the step 3, except oil temperature is 70 DEG C~90 DEG C, oil removing
Time is 5min~30min.
4. the method as described in claim 1, it is characterised in that in the step 3, use flowing warm water and flowing after oil removing respectively
Cold water cleans up the rear shaft neck (1)；Wherein the temperature of flowing warm water is 40 DEG C~70 DEG C, the scavenging period of flowing warm water
For 1min~3min；The temperature of flowing cool water is room temperature, and the scavenging period of flowing cool water is 1min~3min.
5. method as claimed in claim 4, it is characterised in that in the step 3, the rear shaft neck after flowing cool water cleaning
(1) moisture film on surface keeps not breaking continuously in 30s planted agent.
6. the method as described in claim 1, it is characterised in that in the step 5, dehydrogenation temperature is 190 DEG C ± 10 DEG C, dehydrogenation
Time >=3h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510309981.2A CN104928736B (en) | 2015-06-08 | 2015-06-08 | Rear shaft neck inner headed face chromium plating restorative procedure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510309981.2A CN104928736B (en) | 2015-06-08 | 2015-06-08 | Rear shaft neck inner headed face chromium plating restorative procedure |
Publications (2)
| Publication Number | Publication Date |
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| CN104928736A CN104928736A (en) | 2015-09-23 |
| CN104928736B true CN104928736B (en) | 2017-11-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510309981.2A Active CN104928736B (en) | 2015-06-08 | 2015-06-08 | Rear shaft neck inner headed face chromium plating restorative procedure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106435702B (en) * | 2016-12-12 | 2018-11-02 | 中航飞机起落架有限责任公司 | Part plane chrome-plating device and method |
| CN107268056B (en) * | 2017-06-28 | 2019-04-02 | 中国航发南方工业有限公司 | The fixture and method of inlet casing part hard anodized |
| CN114875466B (en) * | 2022-06-07 | 2024-03-22 | 中国航发航空科技股份有限公司 | Size repair fixture and repair method for non-decomposable bearing part |
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| JP2000054112A (en) * | 1998-08-10 | 2000-02-22 | Canon Inc | Masking method |
| CN201520810U (en) * | 2009-10-26 | 2010-07-07 | 成都飞机工业（集团）有限责任公司 | Deep hole electroplating tooling |
| CN104313671A (en) * | 2014-10-15 | 2015-01-28 | 陕西启源科技发展有限责任公司 | Method for radial eyelet hard chrome plating for mandrel |
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Address after: 412002 Dong Jiaduan, Zhuzhou, Hunan Patentee after: China Hangfa South Industrial Co. Ltd. Address before: 412002 Dong Jiaduan, Zhuzhou, Hunan Patentee before: China Southern Airlines Industry (Group) Co., Ltd. |