CN106391370A - Device and method for machining coating layer on surface of conical inner cavity - Google Patents
Device and method for machining coating layer on surface of conical inner cavity Download PDFInfo
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- CN106391370A CN106391370A CN201611094568.XA CN201611094568A CN106391370A CN 106391370 A CN106391370 A CN 106391370A CN 201611094568 A CN201611094568 A CN 201611094568A CN 106391370 A CN106391370 A CN 106391370A
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- work piece
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- 238000000034 method Methods 0.000 title abstract description 17
- 239000011247 coating layer Substances 0.000 title abstract description 6
- 238000003754 machining Methods 0.000 title abstract 3
- 238000000576 coating method Methods 0.000 claims abstract description 72
- 239000007788 liquid Substances 0.000 claims abstract description 72
- 239000011248 coating agent Substances 0.000 claims abstract description 59
- 238000005507 spraying Methods 0.000 claims abstract description 51
- 239000000463 material Substances 0.000 claims abstract description 23
- 239000010409 thin film Substances 0.000 claims abstract description 9
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- 230000000873 masking effect Effects 0.000 claims description 59
- 238000002347 injection Methods 0.000 claims description 29
- 239000007924 injection Substances 0.000 claims description 29
- 238000012545 processing Methods 0.000 claims description 26
- 239000007921 spray Substances 0.000 claims description 13
- 238000000465 moulding Methods 0.000 claims description 9
- 238000010422 painting Methods 0.000 claims description 8
- 238000003672 processing method Methods 0.000 claims description 8
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 9
- 230000005540 biological transmission Effects 0.000 abstract 2
- 239000010408 film Substances 0.000 description 30
- 238000010521 absorption reaction Methods 0.000 description 12
- 238000005516 engineering process Methods 0.000 description 12
- 230000008569 process Effects 0.000 description 10
- 238000001704 evaporation Methods 0.000 description 9
- 230000008020 evaporation Effects 0.000 description 8
- 238000010008 shearing Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 239000002904 solvent Substances 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000007711 solidification Methods 0.000 description 4
- 230000008023 solidification Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000000151 deposition Methods 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 239000002033 PVDF binder Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 210000000078 claw Anatomy 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000013536 elastomeric material Substances 0.000 description 1
- 239000007888 film coating Substances 0.000 description 1
- 238000009501 film coating Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 230000004223 radioprotective effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
- B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
- B05B13/0221—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts
- B05B13/0228—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts the movement of the objects being rotative
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
- B05B13/06—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00 specially designed for treating the inside of hollow bodies
- B05B13/0627—Arrangements of nozzles or spray heads specially adapted for treating the inside of hollow bodies
- B05B13/0636—Arrangements of nozzles or spray heads specially adapted for treating the inside of hollow bodies by means of rotatable spray heads or nozzles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
- B05B13/06—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00 specially designed for treating the inside of hollow bodies
- B05B13/0645—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00 specially designed for treating the inside of hollow bodies the hollow bodies being rotated during treatment operation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B16/00—Spray booths
- B05B16/20—Arrangements for spraying in combination with other operations, e.g. drying; Arrangements enabling a combination of spraying operations
Abstract
The invention discloses a device for machining a coating layer on the surface of an inner cavity. The device comprises structures such as a working box, a workpiece clamp, a first rotating device, a material spraying device, a second rotating device, a coating liquid supply box, a material supply pipe and a heating device. When the device is used, a workpiece is clamped on the workpiece clamp, and the first transmission device and the second transmission device are started to enable the material spraying device and the workpiece clamp to rotate respectively; coatings are sprayed to the surface of the inner cavity of the workpiece through the material spraying device; the material spraying device is started to do axial movement, so that the coatings can be coated at a position to be coated on the surface of the inner cavity of the workpiece; then the rotating speed of the workpiece clamp is increased, and at the moment, a uniform and compact thin film is formed on the surface of the inner cavity of the workpiece by the coatings; the rotating speed of the workpiece clamp is increased again, and the heating device is started; and at proper temperature, the coating layer is cured and formed to form a coating layer thin film with a thickness meeting the requirement. Furthermore, the invention provides a method for machining the coating layer on the surface of the conical inner cavity. The method can achieve the same technical effect.
Description
Technical field
The present invention relates to material surface modifying processing technique field, further relate to a kind of conical internal cavity face coat
Processing unit (plant) and its processing method.
Background technology
The development of modern high technology, not only proposes the performance requirement of more renewals, also to material surface to material
Property transformation provides the technological means of more renewals, and increasing new technique has been applied in material surface engineering,
The every field of national economy have received increasingly apparent economic benefit and social benefit.
Surface engineering technology is through surface preparation, is transformed by surface-coated, surface modification or surfaces of various materials
Technology Combined Processing, changes solid metal surface or form, chemical composition, organizational structure and the stress state of nonmetallic surface
Deng with the engineering technology of the surface property required for obtaining.The advantage of this technology is can to prepare in a variety of ways to be better than
The function of surface thin layer of material body performance, give that processed part is high temperature resistant, anticorrosion, rub resistance, resisting fatigue, radioprotective etc.
Performance., compared with the integral material making part, thickness of thin, area are little, and can greatly lift the use of material for this layer material
It is worth.
For the modified processing of coating of taper reducing surface of internal cavity, traditional process technology includes plasma spray technology, ion
Bundle technology and gas phase deposition technology etc..It is primarily present following technical problem on the whole：1st, coated film and material matrix
Binding ability is not high, loose uneven situation, easily produces fold；2nd, the thickness of coated film is difficult to parametrization control
System, the machined surface due to taper reducing surface of internal cavity bends so that the coating layer thickness of conical camber is difficult to measure and controls；3rd, difficult
To process small taper reducing cavity devices, taper reducing surface of internal cavity has certain closure, and machinable space is narrow
Little, increase the modified difficulty of processing on surface.
Therefore, for a person skilled in the art, how to design a kind of dress that can be evenly coated with modified coating
Put so as to the coated film of uniformity can be processed on reducing surface of internal cavity, be that current those skilled in the art needs
Technical problem to be solved.
Content of the invention
The present invention provides a kind of conical internal cavity face coat processing unit (plant), can process uniformly on reducing surface of internal cavity
Consistent coated film, and its thickness can be changed by the control of rotating speed, and the molding effect of coating is more preferable.Concrete scheme is such as
Under：
A kind of surface of internal cavity coating processing unit (plant), including：
Work box；
It is arranged at the work piece holder in described work box, for gripping workpiece；
Described work piece holder can be driven to make the first tumbler of speed-changing rotation；
Can extend into described workpiece inner chamber and can be to the material-spraying device of inner chamber surface spraying coating, described material spray dress
Put and can be axially moveable；
The second tumbler that described material-spraying device is rotated coaxially can be driven with described work piece holder work；
Described material-spraying device is provided with the masking liquid feed box of coating；
Connect described masking liquid feed box and described material-spraying device, the feeder sleeve for supplying coating；
Heater to the inner chamber heating of described workpiece.
Alternatively, described material-spraying device is the injection disk that can rotate around the center of circle, and the center of described injection disk opens up
Through hole, the coating via through holes flowing out from described feeder sleeve flow to the surface of described injection disk.
Alternatively, described feeder sleeve is flexible pipe；Described feeder sleeve is connected with described injection disk rotational, described injection disk
Relatively rotate with described feeder sleeve.
Alternatively, the through hole of described injection disk is connected the rotation pipe of hard, described rotation pipe and described injection
Disk synchronous rotary；Described feeder sleeve is rotated with described rotation pipe and is connected feeding.
Alternatively, described masking liquid feed box is arranged at the bottommost of described work box, and described work piece holder is arranged at described
The top of work box.
Alternatively, described heater is looped around the periphery of described feeder sleeve, and described heater is opened by top circumference
If inner chamber from through hole to described workpiece spray hot blast.
Alternatively, the top of described work piece holder also sets up overhead gage, and described first tumbler is arranged at described upper gear
On plate.
Alternatively, it is removably disposed collecting board in described work box, described collecting board is used for collecting from described work
Flow down coating.
Additionally, the present invention also provides a kind of conical internal cavity face coat processing method, including：
By piece-holder on work piece holder；
Start the first actuating device and the second actuating device, make described work piece holder and described material-spraying device respectively with ω 21
Rotating speed rotating Vortex with ω 1；
Start masking liquid feed box, make coating be transported to described material-spraying device with stable speed by feeder sleeve；
Start described material-spraying device (4) to move axially, make coatings in the surface of internal cavity of described workpiece；
The rotating speed lifting described work piece holder, to ω 22, makes coating form even compact in the surface of internal cavity of described workpiece
Thin film；
The rotating speed lifting described work piece holder is to ω 23, and opens heater, makes curing of coatings molding.
Alternatively, the rotating speed of ω 1 is 1000r/min, and the rotating speed of ω 21 is 180～300r/min, and the rotating speed of ω 22 is
The rotating speed of 3000～3500r/min, ω 23 is 3500～4000r/min.
The present invention provides a kind of conical internal cavity face coat processing unit (plant), including work box, work piece holder, the first rotation dress
Put, the structure such as material-spraying device, the second tumbler, masking liquid feed box, feeder sleeve and heater.Work box is to carry to install knot
Structure, is used for inside it installing other parts, work piece holder is used for gripping workpiece；First tumbler can drive workpiece
Speed-changing rotation made by fixture and workpiece, makes workpiece with different rotational speed.
Material-spraying device can extend into the inner chamber of workpiece, and can be to its surface of internal cavity sprayed coating, material-spraying device energy simultaneously
Enough move up and down along the rotating shaft of itself；Second tumbler can drive material-spraying device to rotate coaxially with work piece holder.Apply
Liquid feed box passes through feeder sleeve provides coating to material-spraying device, by heater, the inner chamber of workpiece is heated simultaneously.
When using, piece-holder, on work piece holder, starts the first actuating device and the second actuating device, so that material spray is filled
Put and rotate respectively with work piece holder.Coating is conveyed through feeder sleeve to material-spraying device by masking liquid feed box, coating is by material-spraying device
It is ejected into the surface of internal cavity of workpiece, start material-spraying device and move axially, make coatings in application needed for workpiece lumen surface
Position, now the state of coating is that point is block.Then the rotating speed of lifting workpieces fixture, now coating is in the surface of internal cavity of workpiece
Form the thin film of even compact.The rotating speed of lifting workpieces fixture again, and open heater, make the inner chamber of workpiece reach film forming temperature
Degree, curing of coatings molding at a suitable temperature, the satisfactory coated film of one thickness of formation.
Device provided by the present invention can process the coated film of uniformity, Er Qieqi on reducing surface of internal cavity
Thickness can be changed by the control of rotating speed, and the molding effect of coating is more preferable.
Additionally, present invention also offers a kind of conical internal cavity face coat processing method, it is possible to achieve identical technology is imitated
Really.
Brief description
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Have technology description in required use accompanying drawing be briefly described it should be apparent that, drawings in the following description be only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, acceptable
Other accompanying drawings are obtained according to these accompanying drawings.
The structure chart of the conical internal cavity face coat processing unit (plant) that Fig. 1 provides for the present invention；
Fig. 2 a is the schematic diagram of low-speed jet absorption phase；
Fig. 2 b is the schematic diagram that the stage sprawled by speed-raising masking liquid；
Fig. 2 c is the schematic diagram of high-speed rotation cure stage；
Shown in Fig. 3, it is the stress diagram in surface of internal cavity for the masking liquid
Including：
Overhead gage 1, the first tumbler 11, workpiece 2, work piece holder 3, material-spraying device 4, rotate pipe 41, heater 5,
Work box 6, collecting board 61, masking liquid feed box 7, feeder sleeve 8.
Specific embodiment
The core of the present invention is to provide a kind of conical internal cavity face coat processing unit (plant), can be on reducing surface of internal cavity
Process the coated film of uniformity, and its thickness can be changed by the control of rotating speed, the molding effect of coating is more preferable.
In order that those skilled in the art more fully understands technical scheme, below in conjunction with accompanying drawing and specifically
Embodiment, is described in detail explanation to the conical internal cavity face coat processing unit (plant) and its processing method of the application.
As shown in figure 1, a kind of knot of specific embodiments of conical internal cavity face coat processing unit (plant) providing for the present invention
Structure schematic diagram.It mainly includes work box 6, work piece holder 3, the first tumbler 11, material-spraying device 4, the second tumbler, painting
The structures such as liquid feed box 7, feeder sleeve 8 and heater 5.Work box 6, as the casing part of whole device, shields,
Other each structures are set in the inside of work box 6, are separately mounted on the fixed structure in work box 6.
Work piece holder 3 is used for gripping workpiece 2, and work piece holder 3 can be made to become under the drive of the first tumbler 11
Speed rotation, enables workpiece 2 to keep certain specific rotational speed.Work piece holder 3 possesses good self-centering ability, realizes workpiece
2 high-speed rotation.Work piece holder 3, preferably by scroll chuck structure, is arranged on the surface that each claw is contacted with workpiece 2
One floor height intensity elastomeric material, on the premise of ensureing enough clamping forces, the outer surface of protection workpiece 2.
Material-spraying device 4 can extend into the inner chamber of workpiece 2, thus to inner chamber surface spraying coating, material-spraying device 4 can be along axle
To movement.In addition to vertical movement, material-spraying device 4 is passed through the second tumbler drive and is rotated coaxially with work piece holder 3, moves
Dynamic direction is the direction of its rotating shaft.First tumbler 11 and the second tumbler can adopt servomotor, be capable of becoming
Speed rotates, and the change of speed is stable, at the uniform velocity, and servomotor passes through gear or the kind of drive of belt wheel drives work piece holder 3 and spray
Material device 4.
It is additionally provided with the masking liquid feed box 7 that material-spraying device 4 is provided with coating in work box 6；Masking liquid feed box 7 and material-spraying device
Feeder sleeve 8 is connected, the coating in masking liquid feed box 7 supplies to material-spraying device 4 through feeder sleeve 8 between 4.The speed of feed flow is with always
Amount can carry out parametric control by masking liquid feed box 7, adjusts the thickness of coated film.Additionally include the inner chamber to workpiece 2 to add
The heater 5 of heat.
When using, workpiece 2 is clamped on work piece holder 3, starts the first actuating device 11 and the second actuating device, makes
Work piece holder 3 and material-spraying device 4 rotate respectively.Coating, coating are conveyed through feeder sleeve 8 to material-spraying device 4 by masking liquid feed box 7
It is ejected into the surface of internal cavity of workpiece 2 by material-spraying device 4, start material-spraying device 4 and move axially, make coatings in workpiece lumen
The position of application needed for surface, now the state of coating is that point is block.Then the rotating speed of lifting workpieces fixture 3, now coating exist
The surface of internal cavity of workpiece 2 forms the thin film of even compact.The rotating speed of lifting workpieces fixture 3 again, and open heater 5, make work
The inner chamber of part 2 reaches film-forming temperature, at a suitable temperature curing of coatings molding, and the satisfactory coating of one thickness of formation is thin
Film, completes application.
Device provided by the present invention can process the coated film of uniformity, Er Qieqi on reducing surface of internal cavity
Thickness can be changed by the control of rotating speed, and the molding effect of coating is more preferable.
On the basis of the above, the injection disk that material-spraying device 4 specially can rotate around the center of circle, the center of injection disk is opened
If through hole, the coating via through holes flowing out from feeder sleeve 8 flow to the surface of injection disk.As shown in Fig. 2 a to Fig. 2 c, represent respectively
The procedure chart of coated film forming process three phases.Coating first flows to the upper surface circle centre position of injection disk, and injection disk leads to
Overwinding is changed the line of production raw centrifugal force, the masking liquid of circle centre position is uniformly coated to spray the surface of disk, coating can in the end of disk
Equably to eject, therefore coating drop can quantitatively, stably be ejected into the circumference of annular cavity surface sustained height,
This is also the consistent premise of film thickness.
Specifically, feeder sleeve 8 is flexible pipe, can adopt rubber tube, flexible pipe can become with moving up and down of material-spraying device 4
Shape, adapts to different height.Feeder sleeve 8 is connected with injection disk rotational, using the connected mode of cylindrical articulation, spray disk and
Feeder sleeve 8 relatively rotates.In addition, in addition to feeder sleeve 8 whole installation is flexible pipe, also other setting forms can be adopted,
Be connected on the through hole of injection disk the rotation pipe 41 of hard, rotates pipe 41 and injection disk synchronous rotary, applies
Material can flow out from the end rotating pipe 41.Feeder sleeve 8 is rotated with the other end rotating pipe 41 and is connected feeding, now can pass through the
Two tumblers drive and rotate pipe 41 and be further driven to spray disk.It is of course also possible to feeder sleeve 8 whole installation is hard
Pipe, is now connected using being slidably matched with masking liquid feed box 7, can slide in masking liquid feed box 7.
In any of the above-described technical scheme and its on the basis of being mutually combined, masking liquid feed box 7 is arranged at the bottom of work box 6
Portion, work piece holder 3 is arranged at the top of work box 6.This form of implementation is a kind of specific order of presentation, from bottom to top successively
For masking liquid feed box 7, feeder sleeve 8, heater 5, material-spraying device 4, work piece holder 3, coating flows to top from bottom, more holds
The flow of liquid easy to control.It is of course also possible to arrange all parts in the opposite order, as long as making work piece holder 3 and material spray
Device 4 rotates in the horizontal plane.
Heater 5 is looped around the periphery of feeder sleeve 8, and feeder sleeve 8 passes through from the center of heater 5, and heater 5 leads to
Cross the through hole that top circumference opens up and spray hot blast to the inner chamber of workpiece 2.The main effect of heater 5 is the process in work
In, by way of heating, the coated film shaping is solidified, make the solvent content in masking liquid higher in temperature
In environment, masking liquid is isolated in evaporation, so that the concentration of masking liquid and viscosity is constantly increased, also accelerates the condensation of masking liquid, after making solidification
Coated film and annular cavity surface effectively combine so as to stable performance is good.Rational control heating-up temperature can reach
Control the effect of masking liquid setting rate and quality.By this mode of heating, it is adapted to any machinable workpiece, including singly opening
The complicated taper reducing inner chamber of mouth, drastically increases the scope of application.
In addition, also setting up overhead gage 1 at the top of work piece holder 3, the first tumbler 11 is arranged on overhead gage 1.On
Baffle plate 1 is applied not only to install the first tumbler 11, can also stop the coating sputtering on workpiece 2, when the rotating speed of workpiece 2 arrives
Have part paint vehicle when reaching certain height to splash and go out.
It is removably disposed collecting board 61 in work box 6, collecting board 61 is in circular, is arranged on workpiece below 2, is used for
The coating flowing down is collected from described work 2, if collect a certain amount of can dismounting and clear up or changed later.
Additionally, present invention also offers a kind of conical internal cavity face coat processing method, comprising the following steps：
Workpiece 2 is clamped on work piece holder 3；
Start the first actuating device and the second actuating device, make work piece holder 3 and material-spraying device 4 respectively with ω 21 and ω 1
Rotating speed rotating Vortex；
Start masking liquid feed box 7, make coating be transported to material-spraying device 4 with stable speed by feeder sleeve 8, coating passes through
Injection rotating disk equably sprays；
Start material-spraying device 4 to move axially, make coatings in the portion arranging coating required for the surface of internal cavity of workpiece 2
Point；
The rotating speed of lifting workpieces fixture 3, to ω 22, makes the thin film of the surface of internal cavity formation even compact in workpiece 2 for the coating；
The rotating speed of lifting workpieces fixture 3 is to ω 23, and opens heater 5, makes curing of coatings molding.
Because the film coating of different-thickness needs different rotating speeds and temperature parameter, here of the present invention is given a kind of concrete
Embodiment：To illustrate as a example preparation 200um PVDF/PTFE composite membrane at a temperature of 60 DEG C, specific rotating speed for ω 1 is
1000r/min, ω 21 are 180～300r/min, and ω 22 is 3000～3500r/min, and ω 23 is 3500～4000r/min, point
Carry out for three phases, i.e. the three phases such as low-speed jet absorption phase in technical scheme, ω 1, ω 21, ω 22, ω 23 will
Set accordingly according to processing request, ω 22 can be made equal with ω 23.
As shown in Fig. 2 a to Fig. 2 c, spraying process mainly includes three phases, respectively low-speed jet absorption phase, speed-raising
Masking liquid sprawls stage and high-speed rotation cure stage.
(1) low-speed jet absorption phase：The masking liquid with certain viscosity is loaded masking liquid feeding device 7, starts material spray dress
Put 4 and workpiece 2 so as to respectively reach a certain stable relatively low rotary speed ω 1 and ω 21, start masking liquid feeding device 7, make painting
Liquid is transported to the circle centre position of injection disk with stable speed by feeding pipeline, the centrifugal action producing in injection disk
Under, masking liquid ejects after injection disk coating uniformly, with certain speed impacts and adsorb and be deposited in vertical annular
Chamber surface, forms the masking liquid absorption band of a circumference；So that injection disk is moved axially simultaneously, move from the big position of internal diameter
To the little position of internal diameter, injection absorption one depositional plane of formation, painting liquid status now are that point is block.
As shown in figure 3, being the stress diagram in surface of internal cavity for the masking liquid.In the relatively low speed omega of low-speed jet absorption phase
Under 1, masking liquid ejects through material-spraying device 4, during the surface of internal cavity absorption deposition of vertical surface of internal cavity and taper,
Shearing tension F parallel to annular cavity surface being subject toShearingWith adhesion FIn conjunction with, equal to or more than a block masking liquid itself
Gravity G, mainly balance the trend that masking liquid flows downward so that masking liquid absorption is deposited on the surface of inner chamber, forms point block
Apply liquid status.The painting liquid measure that this stage is supplied is more than the painting liquid measure needed for coated film.
(2) stage sprawled by speed-raising masking liquid：After the absorption depositional plane that low-speed jet absorption phase obtains, improve workpiece 2
Rotary speed ω 2, in shearing tension F shearing and centrifugal pressure FFromIn the presence of so as to get point bulk masking liquid sprawled,
Coating is gradually thinning, becomes one piece of smooth coated film, and the rotary speed improving constantly workpiece 2 reaches a certain stationary value ω
22, obtain a uniform, fine and close coated film.
Sprawl the stage in speed-raising masking liquid, the rotary speed improving workpiece, to ω 22, makes shearing tension F suffered by masking liquidShearing
With centrifugal pressure FFromIncrease, keep higher speed omega 22, masking liquid is subject to lasting larger FShearingAnd FFrom(in larger rotating speed
Under effect, now there is FShearing>>G、FIn conjunction with>>G, the impact of the self gravitation of masking liquid is negligible), in FShearingIn the presence of, apply
Liquid is sprawled along the surface of inner chamber to both sides rapidly, and thickness is gradually thinning, become uniformly, in FFromIn the presence of, sprawl the painting of coating
The combination interface of liquid and surface of internal cavity more fine and close so as to be combined with the surface even closer.FShearingAnd FIn conjunction withMainly act on
Binder courses between masking liquid and surface of internal cavity, make binder courses finer and close and uniform, improve coated film and and surface of internal cavity
Binding ability.
The relation of thickness of the control coated film coming especially by the rotary speed of workpiece 2 is：
H∝(ω2)-b
Wherein, ω 2 is the rotary speed of workpiece 2, and b is the constant with regard to masking liquid evaporation rate of solvent in heating process.
On the premise of evaporation rate is certain, the masking liquid of certain viscosity can be reached by controlling rotary speed ω 2 of workpiece 2
Purpose to parametric control coating film thickness.
(3) high-speed rotation cure stage：After the speed-raising masking liquid stage of sprawling obtains coated film, keep workpiece 2 stable
High-speed rotation speed, starts heater 5, makes annular cavity reach stable film-forming temperature, carry out coating at such a temperature thin
Film solidification and shaping, eventually forms the satisfactory coated film of thickness.
In high-speed rotation cure stage, the high-speed rotation in stage sprawled by speed-raising masking liquid to workpiece and masking liquid is carried out fully reaching
Sprawl coating after, obtain one layer and there is certain thickness extremely thin and dense coated film, now the shearing tension of masking liquid
FShearingAdhesion F with surface of internal cavity and masking liquidIn conjunction withEqual, in vertical direction and tapered direction force balance, therefore, is hanging down
Nogata to tapered direction on no longer extend, reach the state of balance；Centrifugal pressure FFromIn the case of keeping constant, reach
To fine and close, very thin effect, and reach poised state.Keep the rotary speed of high speed, open heater 5, evenly lifted
The temperature of annular cavity, after reaching the evaporating temperature needed for coated film, at evaporation at constant temperature solidification under the rotary speed of high speed
The reason regular hour, obtain the coated film of thickness that meets the requirements.
Wherein, in specific evaporation curable and forming process, the speed of the thickness of coated film and the evaporation of masking liquid solvent
Relation is：
H∝ub
Wherein：B is the constant with regard to evaporation rate of solvent, and u is the evaporation rate of masking liquid solvent.
On the premise of the rotary speed of workpiece 2 is certain, the masking liquid of certain viscosity can be reached by controlling speed u evaporated
Purpose to parametric control coating film thickness.
Preferably, during low-speed jet absorption phase, speed-raising masking liquid sprawl stage and high-speed rotation cure stage three
All first processing larger and isometrical surface of internal cavity of internal diameter, processing internal diameter is less afterwards and the surface of internal cavity of reducing.Masking liquid is isometrical interior
Chamber surface is different with stress on reducing surface of internal cavity, leads to the inconsistent problem of masking liquid liquid form, needs different by setting
The rotary speed of workpiece, the requirement consistent to reach coating film thickness, compactness, binding ability of coating quantity delivered.Specifically
Larger for internal diameter less position rotary speed, quantity delivered is more.
The processing unit (plant) being provided using the present invention and method, can effectively improve the taper reducing inner chamber to fine device
The coating modification crudy on surface, is embodied in the coated film of coating and the binder courses of surface of internal cavity is finer and close and equal
Even, improve both binding abilities；And the thickness of this coated film can be steamed by the rotary speed and heating that control workpiece
The speed sending out solidification reaches the purpose of parametric control, solve prior art cannot parametric control a difficult problem；For small device
The coating of part taper reducing inner chamber, as long as can solve using the rotary-jet platform of minimum external diameter, not only solves micro devices
A processing difficult problem, also expand the scope of application of device.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the present invention.
Multiple modifications to these embodiments will be apparent from for those skilled in the art, as defined herein
General Principle, can realize without departing from the spirit or scope of the present invention in other embodiments.Therefore, this
Bright be not intended to be limited to the embodiments shown herein, and be to fit to and principles disclosed herein and features of novelty phase
Consistent scope the widest.
Claims (10)
1. a kind of surface of internal cavity coating processing unit (plant) is it is characterised in that include：
Work box (6)；
It is arranged in described work box (6), be used for gripping the work piece holder (3) of workpiece (2)；
Described work piece holder (3) can be driven to make first tumbler (11) of speed-changing rotation；
Can extend into described workpiece (2) inner chamber and can be to the material-spraying device (4) of inner chamber surface spraying coating, described material spray
Device (4) can be axially moveable；
The second tumbler that described material-spraying device (4) is rotated coaxially can be driven with described work piece holder (3) work；
Described material-spraying device (4) is provided with the masking liquid feed box (7) of coating；
Connect described masking liquid feed box (7) and described material-spraying device (4), the feeder sleeve (8) for supplying coating；
Heater (5) to the inner chamber heating of described workpiece (2).
2. conical internal cavity face coat processing unit (plant) according to claim 1 is it is characterised in that described material-spraying device (4)
For the injection disk that can rotate around the center of circle, the center of described injection disk opens up through hole, the painting flowed out from described feeder sleeve (8)
Material via through holes flow to the surface of described injection disk.
3. conical internal cavity face coat processing unit (plant) according to claim 2 is it is characterised in that described feeder sleeve (8) is
Flexible pipe；Described feeder sleeve (8) is connected with described injection disk rotational, and described injection disk is relatively rotated with described feeder sleeve (8).
4. conical internal cavity face coat processing unit (plant) according to claim 2 it is characterised in that described injection disk logical
Be connected on hole the rotation pipe (41) of hard, described rotates pipe (41) and described injection disk synchronous rotary；Described feeder sleeve
(8) rotate with described rotation pipe (41) and be connected feeding.
5. the conical internal cavity face coat processing unit (plant) according to any one of Claims 1-4 is it is characterised in that described painting
Liquid feed box (7) is arranged at the bottommost of described work box (6), and described work piece holder (3) is arranged at the top of described work box (6)
Portion.
6. conical internal cavity face coat processing unit (plant) according to claim 5 is it is characterised in that described heater (5)
It is looped around the periphery of described feeder sleeve (8), the through hole that described heater (5) is opened up by top circumference is to described workpiece (2)
Inner chamber injection hot blast.
7. conical internal cavity face coat processing unit (plant) according to claim 6 is it is characterised in that described work piece holder (3)
Top also set up overhead gage (1), described first tumbler (11) is arranged on described overhead gage (1).
8. conical internal cavity face coat processing unit (plant) according to claim 5 is it is characterised in that described work box (6) is interior
It is removably disposed collecting board (61), described collecting board (61) is used for collecting the coating flowing down from described work (2).
9. a kind of conical internal cavity face coat processing method is it is characterised in that include：
Workpiece (2) is clamped on work piece holder (3)；
Start the first actuating device and the second actuating device, make described work piece holder (3) and described material-spraying device (4) respectively with ω
21 and ω 1 rotating speed rotating Vortex；
Start masking liquid feed box (7), make coating be transported to described material-spraying device (4) with stable speed by feeder sleeve (8)；
Start described material-spraying device (4) to move axially, make coatings in the surface of internal cavity of described workpiece (2)；
The rotating speed lifting described work piece holder (3), to ω 22, makes coating form even compact in the surface of internal cavity of described workpiece (2)
Thin film；
The rotating speed lifting described work piece holder (3) is to ω 23, and opens heater (5), makes curing of coatings molding.
10. conical internal cavity face coat processing method according to claim 9 is it is characterised in that the rotating speed of ω 1 is
The rotating speed of 1000r/min, ω 21 is 180～300r/min, and the rotating speed of ω 22 is 3000～3500r/min, and the rotating speed of ω 23 is
3500～4000r/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611094568.XA CN106391370A (en) | 2016-12-01 | 2016-12-01 | Device and method for machining coating layer on surface of conical inner cavity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611094568.XA CN106391370A (en) | 2016-12-01 | 2016-12-01 | Device and method for machining coating layer on surface of conical inner cavity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106391370A true CN106391370A (en) | 2017-02-15 |
Family
ID=58083243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611094568.XA Pending CN106391370A (en) | 2016-12-01 | 2016-12-01 | Device and method for machining coating layer on surface of conical inner cavity |
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| Country | Link |
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| CN (1) | CN106391370A (en) |
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| CN110605402A (en) * | 2019-09-18 | 2019-12-24 | 河南科技大学 | 3D printing device and method based on centrifugal atomization |
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