CN106166834A - The preparation method of spaceborne Electrostatic deformation film antenna reflecting surface thermoforming and device - Google Patents
The preparation method of spaceborne Electrostatic deformation film antenna reflecting surface thermoforming and device Download PDFInfo
- Publication number
- CN106166834A CN106166834A CN201610420933.5A CN201610420933A CN106166834A CN 106166834 A CN106166834 A CN 106166834A CN 201610420933 A CN201610420933 A CN 201610420933A CN 106166834 A CN106166834 A CN 106166834A
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- Prior art keywords
- reflecting surface
- film antenna
- antenna reflecting
- thermoforming
- blank
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/08—Deep drawing or matched-mould forming, i.e. using mechanical means only
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/26—Component parts, details or accessories; Auxiliary operations
- B29C51/266—Auxiliary operations after the thermoforming operation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/14—Reflecting surfaces; Equivalent structures
- H01Q15/16—Reflecting surfaces; Equivalent structures curved in two dimensions, e.g. paraboloidal
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
The invention discloses preparation method and the device of a kind of spaceborne Electrostatic deformation film antenna reflecting surface thermoforming, location is connected by centrepin further between base plate, punch and liner plate, thin film is clamped by intermeshing circular saw and is located by connecting by train wheel bridge and lower plate, linear axis top is connected with lower plate by sliding sleeve, shaft block ring, beam, square are connected by beam attachment screw with train wheel bridge, are connected by split pin between screw mandrel and the beam of linear stepping motor.Use the thermoplastic film without coating as molding object, thin film is cut into blank, blank is heated to elastic-plastic behavior, rely on and mold the blank bending making preheating, after cooling and shaping, process through finishing and surface, obtain the Kapton reflecting surface of required parabolic shape band coating, obtain the Electrostatic deformation film antenna reflecting surface of higher precision, the problem solving to there is the bigger errors of principles in existing film antenna reflecting surface preparation process.
Description
Technical field
The present invention spaceborne Electrostatic deformation thin film deployable antenna technical field, is specifically related to a kind of spaceborne Electrostatic deformation thin film
The preparation method of antenna reflective face thermoforming and device.
Background technology
At present, Electrostatic deformation film antenna is a kind of Novel satellite borne deployable antenna, mainly by electrode surface, sub-truss,
Film reflector faces etc. are constituted, and film reflector face is the one side parabolic surface with the coat of metal, traditional film reflector face
It is that the curved surface film of parabolic shape is split setting-out is planar diaphragm, uses and some coated planar diaphragms are spliced by spell shape formula
Get up, coupled together by bonding method between diaphragm, wherein there is the biggest errors of principles and random error.
Summary of the invention
Because the drawbacks described above of prior art, the present invention provides kind of one spaceborne Electrostatic deformation film antenna to reflect fever sensation of the face
The preparation method of molding and device, the polyimides planar film blank without coating is secondary forming by the method for thermoforming,
To whole or some parabolic surface diaphragms.The method plated by vacuum sputtering again plates conductive layer in the side of curved surface film, from
And obtain the Electrostatic deformation film antenna reflecting surface of higher precision, solve existing film antenna reflecting surface preparation process exists relatively
The problem of the big errors of principles.
For achieving the above object, the invention provides the preparation of a kind of spaceborne Electrostatic deformation film antenna reflecting surface thermoforming
Method, uses the thermoplastic film without coating as thermoforming object, thin film is cut into blank, blank is heated to elastoplasticity
State, makes accessory be close to die surface by lowering or hoisting gear, relies on and molds the blank bending making preheating, after cooling and shaping,
Process through finishing and surface, obtain the Kapton reflecting surface of required parabolic shape band coating.
Preferably, the process of thermoforming is carried out in thermostatic drying chamber, and employing resistance wire is as thermal source, by baking oven
Temperature control component controls programming rate, temperature retention time and rate of cooling, obtains heat convection by blast apparatus, by blank
It is heated to forming temperature, enters holding stage, after insulation molding, enter the furnace cooling stage.
Preferably, employing linear stepping motor is as reciprocating actuating device, by controlling for any of the above-described scheme
Device realizes mold pressing, the control of stripping movement.
Any of the above-described scheme preferably, mold materials aluminium alloy, use single formpiston as die form, mould
There is arc transition corner, and its radius of curvature is more than the thickness of molding stock.
Preferably, surface is processed and is i.e. obtained in the side of thin film by physical deposition method vacuum sputtering any of the above-described scheme
To the coat of metal.
The present invention also provides for a kind of spaceborne Electrostatic deformation film antenna reflecting surface thermal formation apparatus, including base plate and punch,
Punch is arranged on liner plate top, and liner plate is arranged on base plate top, is connected by centrepin further between base plate, punch and liner plate
Thin film is clamped by intermeshing circular saw and is located by connecting by location, train wheel bridge and lower plate, and linear axis passes through tightening
Screw is connected with base plate, and linear axis top is connected with lower plate by sliding sleeve, shaft block ring, and square is arranged on train wheel bridge, beam
Arranging on square, beam, square are connected by beam attachment screw with train wheel bridge, by opening between screw mandrel and the beam of linear stepping motor
Mouth pin connects.
Preferably, coordinating between described linear axis and sliding sleeve is interference fits to any of the above-described scheme, sliding sleeve and lower folder
Being interference fit between plate, be interference fit between linear axis and base plate, coordinating between alignment pin with lower plate is interference
Coordinating, coordinating between centrepin with punch, liner plate, base plate is interference fit.
Preferably, one end of described train wheel bridge and lower plate is located by connecting any of the above-described scheme by alignment pin, separately
One end connects fixing by clamping plate attachment screw such that it is able to realize being uniformly distributed of clamping force.
Beneficial effects of the present invention: the preparation method of a kind of spaceborne Electrostatic deformation film antenna reflecting surface thermoforming and dress
Putting, including base plate and punch, punch is arranged on liner plate top, and liner plate is arranged on base plate top, enters between base plate, punch and liner plate
One step is connected location, train wheel bridge and lower plate by centrepin and is clamped by thin film and the company of location by intermeshing circular saw
Connecing, linear axis is connected with base plate by holding screw, and linear axis top is connected with lower plate by sliding sleeve, shaft block ring, square
Being arranged on train wheel bridge, beam arranges on square, and beam, square are connected by beam attachment screw with train wheel bridge, linear stepping motor
Connected by split pin between screw mandrel and beam.Use the thermoplastic film without coating as molding object, thin film is cut into embryo
Part, is heated to elastic-plastic behavior by blank, makes accessory be close to die surface by lowering or hoisting gear, relies on mold pressing to make preheating
Blank bends, and after cooling and shaping, processes through finishing and surface, obtains the Kapton of required parabolic shape band coating
Reflecting surface.Obtain the Electrostatic deformation film antenna reflecting surface of higher precision, solve in existing film antenna reflecting surface preparation process
The problem that there is the bigger errors of principles.
Below with reference to accompanying drawing, the technique effect of design, concrete structure and the generation of the present invention is described further, with
It is fully understood from the purpose of the present invention, feature and effect.
Accompanying drawing explanation
Fig. 1 is the preparation method procedure chart of the spaceborne Electrostatic deformation film antenna reflecting surface thermoforming of the present invention；
Fig. 2 is the installation diagram of the present invention spaceborne Electrostatic deformation film antenna reflecting surface thermal formation apparatus one preferred embodiment；
Fig. 3 is the partial structurtes schematic diagram of Fig. 2；
Fig. 4 is schematic enlarged-scale view at the A of Fig. 3；
Fig. 5 is schematic enlarged-scale view at the B of Fig. 3；
Fig. 6 is the partial structurtes schematic diagram of Fig. 2；
Fig. 7 is the partial structurtes schematic diagram of Fig. 6；
Fig. 8 is another partial structurtes schematic diagram of Fig. 2；
Fig. 9 is another partial structurtes schematic diagram of Fig. 2；
Figure 10 is the partial structurtes enlarged drawing of Fig. 9；
Figure 11 is the partial structurtes enlarged drawing of Fig. 9；
Figure 12 is the partial structurtes schematic diagram of Fig. 2.
Detailed description of the invention
The preparation method of the spaceborne Electrostatic deformation film antenna reflecting surface thermoforming of the embodiment of the present invention includes: with without coating
TPI flat film as molding object, thin film is cut into the circular and blank of certain size, by blank
It is heated to reach elastic-plastic behavior between vitrification point and flow temperature, makes accessory be close to mould table by lowering or hoisting gear
Face, relies on mold pressing to make to preheat blank bending, and after furnace cooling sizing, blow-on takes out product, through suitable finishing and surface
Reason, finishing includes trimming, cleans releasing agent etc., and surface processes and includes that surface deposits conductive layer, obtains required parabolic shape band
The Kapton reflecting surface of coating.
The operation of thermoforming is carried out in thermostatic drying chamber, uses resistance wire as thermal source, and it is right to be made by blast apparatus
Stream heat exchange.Blank is heated to forming temperature, and forming temperature interval is more than vitrification point, below flow temperature, enters and protects
Thermophase, there is the Mechanics Phenomenon such as stress relaxation, be incubated molding in period, the usual heating-up time is 1 hour, and temperature retention time is 2 little
Time, last furnace cooling is to room temperature.Programming rate, temperature retention time and cooling speed is controlled by the temperature control component of baking oven
Degree.
By intermeshing sawtooth, thin film is clamped between train wheel bridge 9 and lower plate 10, pass through between upper lower plate 10
Alignment pin 11 is located by connecting, and connects fixing by clamping plate attachment screw 12, uses manual mode, simple and convenient reliably, simultaneously
Being uniformly distributed of clamping force can be realized.
Using linear stepping motor as the actuating device of straight reciprocating motion, shaft screw mandrel uses two ends through, with
Realizing being connected with lowering or hoisting gear through couveuse preformed hole, can realize bigger stroke simultaneously, linear stepping motor back installs additional
The gap that disappears nut avoids rocking of screw mandrel, realizes mold pressing, the control of stripping movement by controller.
Dimensional contraction in view of cooling stage cannot be ignored, due to aluminium alloy and Kapton in common used material
Thermal coefficient of expansion close, aluminium alloy is as hot forming tool material.The single formpiston of employing is as die form, for avoiding producing
Raw internal stress, has arc transition in the corner of mould, and its radius of curvature is more than the thickness of molding stock.
Have the phenomenon of resilience during polyimides is secondary forming, resilience be the difference by cooling stage thermal coefficient of expansion and
In polymer shaping process, the storage of high elastic deformation causes, and die design stage should compensate on mould springback capacity, work
Journey uses empirical equation and the compensation method of verification experimental verification, centered by the barycenter of product, test specimen by correcting formula as follows
Reduce, input as engineering by the product after reducing when Design of Dies, thus obtain preferable product.
F=1/ [(T-P) × Δ T+1]
In formula, F is thermal expansion correction coefficient, and T is the mold hot coefficient of expansion, and P is product thermal coefficient of expansion, and Δ T is molding
Temperature and the difference of room temperature.
Obtain after polyimides thermoforming is the curved surface film without coating, is existed by the vacuum sputtering in physical deposition method
The side of parabola thin film obtains the coat of metal.
As shown in Fig. 1-Figure 12, the preparation of thermoforming is using the TPI flat film without coating as molding
Object, is cut into the blank of circle by thin film,
Thin film is clamped by train wheel bridge and lower plate by intermeshing circular saw.The engagement range of circular saw is
[dl,dm], the size of thin film blank is in the engagement range of circular saw.Coating releasing agent at die surface, releasing agent is usually
Silicone grease and resin releasing agent, be placed on thin film between train wheel bridge 9 and lower plate 10 clamping, be placed in baking oven by device, logical
Cross split pin 16 linear stepping motor union joint and device to be coupled together.Slowly heat up, mould is heated to forming temperature, become
Type temperature range is between vitrification point and flow temperature so that it is arriving elastic-plastic behavior, now Kapton is heated
Soften, handle lowering or hoisting gear by controller and blank is close to die surface, rely on mold pressing to make to preheat blank bending, insulation
A period of time, after furnace cooling to room temperature, product was taken out in blow-on, and through the finishing in later stage, the finishing in later stage is main until molding
Including trimming, surface deposition conductive material, obtain the Kapton reflecting surface of required parabolic shape band coating.
The operation of thermoforming is carried out in high temperature oven, uses resistance wire as thermal source, is made by blast apparatus
Heat convection, controls programming rate, temperature retention time and rate of cooling by the temperature control component of baking oven, and heating up, it is even to remain
Speed heats up, and the heating-up time is usually 1 hour, and temperature retention time is 2 hours, is cooled to furnace cooling to room temperature.
By intermeshing sawtooth, thin film is clamped between upper lower plate 10, between upper lower plate 10, pass through alignment pin
11 are located by connecting, and connect fixing by clamping plate attachment screw 12, use manual mode, simple and convenient reliably, can realize simultaneously
Being uniformly distributed of clamping force.
Using linear stepping motor as the actuating device of straight reciprocating motion, linear stepping motor uses two ends through
Formula, realizes being connected with lowering or hoisting gear through couveuse preformed hole by the leading screw of shaft, can realize bigger stroke, motor simultaneously
Install the gap nut that disappears additional and avoid rocking of screw mandrel, realize mold pressing, the control of stripping movement by controller.
Dimensional contraction in view of cooling stage cannot be ignored, due to aluminium alloy and Kapton in common used material
Thermal coefficient of expansion close, aluminium alloy is as hot forming tool material.
Using single formpiston as die form, for avoiding producing internal stress, have arc transition in the corner of mould, it is bent
Rate radius is more than the thickness of molding stock.
As in figure 2 it is shown, a kind of spaceborne Electrostatic deformation film antenna reflecting surface thermal formation apparatus, including: base plate 1, punch 2,
Liner plate 3, linear axis 4, holding screw 5, centrepin 6, shaft block ring 7, sliding sleeve 8, train wheel bridge 9, lower plate 10, alignment pin 11,
Clamping plate attachment screw 12, beam attachment screw 13, square 14, beam 15, split pin 16, through linear stepping motor.
Punch 2 is placed on liner plate 3, and liner plate 3 is placed on base plate 1, connects location by centrepin 6.Centrepin 6 is with convex
Cooperation between mould 2, liner plate 3, base plate 1 is interference fit.
As it is shown on figure 3, punch 2 is placed on liner plate 3, liner plate 3 is placed on base plate 1, connects location by centrepin 6.
Coordinating between bearing pin 11 with punch 2, liner plate 3, base plate 1 is interference fit.Punch 2 surface is required parabolic shape, passes through
Formula linear stepping motor can control the lifting of thin film blank, it is achieved molding and stripping operation, it is placed on high temperature oven
Outside, controls the motion of thin film blank by controller.Whole device is placed in high temperature oven, and high temperature oven can control
Heating, cooling, the time of furnace cooling and speed.
Train wheel bridge 9 and lower plate 10, clamped thin film by intermeshing circular saw, by alignment pin 11, folder
Plate attachment screw 12 is located by connecting.Coordinating between alignment pin 11 with lower plate 10 is interference fit, alignment pin 11 top
For taper pin, convenient location.
As shown in Figure 5-Figure 7, linear axis 4 bottom is located by connecting with base plate 1 by holding screw 5, linear axis 4 and base plate 1
Between be interference fit, top is coordinated with lower plate 10 by sliding sleeve 8, shaft block ring 7, coordinating between linear axis 4 with sliding sleeve 8
For interference fits, it is interference fit between sliding sleeve 8 and lower plate 10.
Square 14 is placed on train wheel bridge 9, and beam 15 is placed on two squares 14, by beam attachment screw 13 by beam 15,
Square 14 couples together with train wheel bridge 9.Connected by split pin 16 between screw mandrel 17 and beam 15 that linear stepping motor stretches out.Beam
It is matched in clearance between 15 and screw mandrel, screw mandrel and straight pin.
The outside of baking oven it is arranged on, by preformed hole by screw mandrel in view of hot environment in baking oven, motor and stopping means
Stretch in baking oven, realize motor and the connection of device in baking oven.
The preferred embodiment of the present invention described in detail above.Should be appreciated that those of ordinary skill in the art without
Need creative work just can make many modifications and variations according to the design of the present invention.Therefore, all technology in the art
Personnel are available by logical analysis, reasoning, or a limited experiment the most on the basis of existing technology
Technical scheme, all should be in the protection domain being defined in the patent claims.
Claims (8)
1. the preparation method of a spaceborne Electrostatic deformation film antenna reflecting surface thermoforming, it is characterised in that use without coating
Thin film, as thermoforming object, is cut into blank by thermoplastic film, and blank is heated to elastic-plastic behavior, passes through lowering or hoisting gear
Make blank be close to die surface, rely on and mold the blank bending making preheating, after cooling and shaping, through finishing and surface
Reason, obtains the Kapton reflecting surface of required parabolic shape band coating.
The preparation method of a kind of spaceborne Electrostatic deformation film antenna reflecting surface thermoforming the most as claimed in claim 1, its feature
Being, the process of thermoforming is carried out in thermostatic drying chamber, and employing resistance wire is as thermal source, by the temperature control component of baking oven
Control programming rate, temperature retention time and rate of cooling, obtain heat convection by blast apparatus, blank is heated to molding temperature
Degree, enters holding stage, after insulation molding, enters the furnace cooling stage.
The preparation method of a kind of spaceborne Electrostatic deformation film antenna reflecting surface thermoforming the most as claimed in claim 1, its feature
It is, uses linear stepping motor as reciprocating actuating device, realize mold pressing, the control of stripping movement by controller
System.
The preparation method of a kind of spaceborne Electrostatic deformation film antenna reflecting surface thermoforming the most as claimed in claim 1, its feature
It is, mold materials aluminium alloy, uses single formpiston to have arc transition as die form, the corner of mould, its curvature
Radius is more than the thickness of molding stock.
The preparation method of a kind of spaceborne Electrostatic deformation film antenna reflecting surface thermoforming the most as claimed in claim 1, its feature
Being, described surface processes and i.e. obtains the coat of metal by the vacuum sputtering in physical deposition method in the side of thin film.
A kind of spaceborne Electrostatic deformation film antenna reflecting surface thermal formation apparatus the most as claimed in claim 1, it is characterised in that, bag
Including base plate and punch, punch is arranged on liner plate top, and liner plate is arranged on base plate top, between base plate, punch and liner plate further
Connect location, train wheel bridge and lower plate by centrepin to be clamped by thin film by intermeshing circular saw, and by location
Bearing pin positions, and is connected by clamping plate connecting bolt, and linear axis is connected with base plate by holding screw, and linear axis top is by sliding
Set, shaft block ring are connected with lower plate, and square is arranged on train wheel bridge, and beam arranges on square, and beam, square and train wheel bridge pass through beam
Attachment screw connects, and is connected by split pin between screw mandrel and the beam of linear stepping motor.
A kind of spaceborne Electrostatic deformation film antenna reflecting surface thermal formation apparatus the most as claimed in claim 6, it is characterised in that, institute
Stating coordinating between linear axis with sliding sleeve is interference fits, is interference fit between sliding sleeve and lower plate, linear axis and base plate it
Between be interference fit, coordinating between alignment pin with lower plate is interference fit, between centrepin and punch, liner plate, base plate
Cooperation be interference fit.
A kind of spaceborne Electrostatic deformation film antenna reflecting surface thermal formation apparatus the most as claimed in claim 6, it is characterised in that, institute
State train wheel bridge and lower plate is located by connecting by alignment pin, connected by clamping plate attachment screw fixing such that it is able to realize folder
Being uniformly distributed of clamp force.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610420933.5A CN106166834A (en) | 2016-06-14 | 2016-06-14 | The preparation method of spaceborne Electrostatic deformation film antenna reflecting surface thermoforming and device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610420933.5A CN106166834A (en) | 2016-06-14 | 2016-06-14 | The preparation method of spaceborne Electrostatic deformation film antenna reflecting surface thermoforming and device |
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| Publication Number | Publication Date |
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| CN106166834A true CN106166834A (en) | 2016-11-30 |
Family
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| CN201610420933.5A Pending CN106166834A (en) | 2016-06-14 | 2016-06-14 | The preparation method of spaceborne Electrostatic deformation film antenna reflecting surface thermoforming and device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107093803A (en) * | 2017-05-12 | 2017-08-25 | 西安航天恒星科技实业(集团)公司 | Paraballon is integrally formed reflecting surface and its forming method |
| CN108321507A (en) * | 2018-01-28 | 2018-07-24 | 高亚贵 | A kind of helical antenna forming auxiliary device for thermoforming machine |
| CN111098524A (en) * | 2019-12-12 | 2020-05-05 | 上海复合材料科技有限公司 | Device and method suitable for vacuum replication of high-precision antenna reflecting surface |
| CN113265075A (en) * | 2020-02-17 | 2021-08-17 | 北京化工大学 | Paraboloid polyimide film and preparation method thereof |
| CN113265881A (en) * | 2020-02-17 | 2021-08-17 | 北京化工大学 | Paraboloid-shaped polyimide/silver composite film and preparation method thereof |
| CN113506972A (en) * | 2021-06-08 | 2021-10-15 | 上海宇航系统工程研究所 | Space anti-static film antenna film surface |
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| CN108321507B (en) * | 2018-01-28 | 2020-10-13 | 诸暨市浣港机械厂 | Spiral antenna forming auxiliary device for thermoforming machine |
| CN111098524A (en) * | 2019-12-12 | 2020-05-05 | 上海复合材料科技有限公司 | Device and method suitable for vacuum replication of high-precision antenna reflecting surface |
| CN113265075A (en) * | 2020-02-17 | 2021-08-17 | 北京化工大学 | Paraboloid polyimide film and preparation method thereof |
| CN113265881A (en) * | 2020-02-17 | 2021-08-17 | 北京化工大学 | Paraboloid-shaped polyimide/silver composite film and preparation method thereof |
| CN113265881B (en) * | 2020-02-17 | 2022-05-20 | 北京化工大学 | Paraboloid-shaped polyimide/silver composite film and preparation method thereof |
| CN113265075B (en) * | 2020-02-17 | 2022-05-20 | 北京化工大学 | Paraboloid polyimide film and preparation method thereof |
| CN113506972A (en) * | 2021-06-08 | 2021-10-15 | 上海宇航系统工程研究所 | Space anti-static film antenna film surface |
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