CN109786979A - The method of the anti-heterogeneous material splicing seams oil paint cracking of PTFE base antenna array - Google Patents
The method of the anti-heterogeneous material splicing seams oil paint cracking of PTFE base antenna array Download PDFInfo
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- CN109786979A CN109786979A CN201910094602.0A CN201910094602A CN109786979A CN 109786979 A CN109786979 A CN 109786979A CN 201910094602 A CN201910094602 A CN 201910094602A CN 109786979 A CN109786979 A CN 109786979A
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- ptfe
- oil paint
- antenna array
- medium substrate
- paint cracking
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Abstract
A kind of method of anti-heterogeneous material splicing seams oil paint cracking of PTFE base antenna array proposed by the present invention, it is desirable to provide it is a kind of can effectively avoid on same paint face, between the base antenna array functional areas PTFE and circumferential metal structural member because of the process of dissimilar material temperature stress bring surface and interface oil paint cracking.The technical scheme is that: it is characterized by comprising the following steps: assembly splicing metallic carrier and PTFE medium substrate after sandblasting roughening；And anti-dissimilar materials oil paint cracking groove is processed at the splicing circle seam for the interconnection that connects；Ion processing activates face to be painted and carries out surface cleaning；Then with wet on wet technique to carrying out paint spraying processing on metallic carrier, PTFE medium substrate and anti-dissimilar materials oil paint cracking groove on antenna array, resisting filling in heterogeneous material oil paint cracking groove to have the elastic silicone rubber of bonding, waterproof performance using automatic dropping glue equipment again, and deaeration co-curing is carried out to silicon rubber.
Description
Technical field
The present invention relates to surface coating technique fields, more particularly to polytetrafluoroethylene (PTFE) (PTFE) and two kinds of materials of metal
It is spliced to form the method for the otherwise exposed antenna front anti-oil paint cracking of dissimilar materials that row paints again jointly；
Background technique
Antenna array is the critical component for realizing the transmitting-receiving of phased-array radar electromagnetic wave signal.Ground or airborne platform radar
Antenna array general work is in complicated external environment, to the long-term high/low temperature variation of antenna array surface coating layer, high temperature
The environmental reliabilities such as high humidity require high.
Polytetrafluoroethylene PTFE is a kind of to combine heat resistance, chemical inertness and excellent insulation stability and low frictional properties
High performance material, the comprehensive advantage that can not be contended with other materials, the flexibility that it is applied enables it to be used for almost institute
Have on the product of shapes and sizes.Polytetrafluoroethylene (PTFE) is generated by tetrafluoroethene through free radical polymerization, and polytetrafluoroethylene PTFE is not
Stick coating can 260 DEG C be used continuously, the short time can high temperature resistant to 300 DEG C, have 290-300 DEG C of maximum operation (service) temperature, pole
Low coefficient of friction, good wearability and fabulous chemical stability.Polytetrafluoroethylene (PTFE) is hardly corroded by drug, can
, can which kind of class chemical mediator long-time service in office to protect parts from by any kind of chemical attack.Although it is pole
Good adhesive, but this performance makes it extremely difficult with the surface bonding of other objects again.Due to excellent dielectricity
Can, PTFE has been used as the main material of microstrip antenna front dielectric-slab.In antenna array, the assembly of PTFE medium substrate, spiral shell
It fills, be bonded or welded metal structure part.Since PTFE substrate is integral by assembly splicing with metallic carrier, at interface
Place there are problems that being uneven, inevitably in the appearance of two class materials during assembled, spiral shell dress, being bonded or welded
Interface is there are micro gap and difference in height, and lacquer painting is that interface is isolated to splice fluting, and dissimilar materials antenna array paint does not connect
It is continuous.The thermal expansion coefficient of PTFE is 5 times of antenna array common metal material aluminium alloy, 10 times or so of steel, if directly right
Front carries out large area continuous spray, and paint film appearance is smooth, intact in a short time, but under long-term high/low temperature, wet heat condition, by
It is inconsistent in paint, metal, the thermal expansion coefficient of PTFE own material, necessarily because swollen between PTFE and metal dissimilar materials
Contracting difference generates stress concentration in boundary (table) face, eventually leads to dissimilar materials splicing interface generation paint crackle, bulge even takes off
It falls, leads to the antenna array substrate directly exposed moisture absorption in air, corrosion etc., lead to the reduction of antenna function and performance, thus
Directly affect the presentation quality and performance indicator of antenna array.This is that the coating of PTFE base antenna array dissimilar materials surface is universal
Existing long-term reliability problems.
Summary of the invention
The present invention be directed to the above-mentioned deficiency of PTFE base antenna array conventional coating methods, it is strong to provide a kind of craftsmanship, at
This low, high reliablity has water-tight function, can effectively avoid on same paint face, the base antenna array functional areas PTFE and periphery
Because the anti-PTFE base antenna array of dissimilar material temperature stress bring table (boundary) face oil paint cracking is heterogeneous between hardware
The method of material splicing seams oil paint cracking.
In order to realize that above-mentioned purpose of the invention, the present invention provide a kind of heterogeneous material splicing seams oil of anti-PTFE base antenna array
The method for painting cracking, it is characterised in that include the following steps: that sandblasting is roughened PTFE medium substrate 2, reassemble splicing metallic carrier
1 with PTFE medium substrate 2；Antenna array metallic carrier 1 connect with PTFE medium substrate 2 interconnection splicing circle seam at add
The anti-dissimilar materials oil paint cracking groove 3 of work；Ion processing activates face to be painted and carries out surface cleaning；Then with wet on wet work
Skill is to carrying out paint spraying on metallic carrier 1, PTFE medium substrate 2 and anti-dissimilar materials oil paint cracking groove 3 on antenna array
Processing, then resisting filling in heterogeneous material oil paint cracking groove 3 to have bonding, the elasticity of waterproof performance using automatic dropping glue equipment
Silicon rubber, and deaeration co-curing is carried out to silicon rubber.
The present invention has the following beneficial effects: compared with the prior art
Craftsmanship is strong, at low cost.The present invention is used to connect interconnection in the metallic carrier 1 of antenna array with PTFE medium substrate 2
Splice the anti-dissimilar materials oil paint cracking groove 3 of processing at boundary's seam；It is activated using Surface Treatment with Plasma machine ion processing wait paint
Face simultaneously carries out surface cleaning, improves the surface tension of substrate, so that the bond strength of material surface and coating tends to be bigger, benefit
Plasma is generated between electrode under the action of radio-frequency generator with a large amount of ion is contained in plasma surface finishing machine
With treated object surface priming reaction occurs for body under upper state state, changes surface-active, with very strong oxidisability to table
Face is handled, and treated object surface is made to form the polar functionalities group of one layer of electrification, its surface energy is improved, to also improve
Its ability for adsorbing liquid.Then with two one dry wet on wet techniques of spray to metallic carrier 1, PTFE medium base on antenna array
Paint spraying processing is carried out on plate 2 and anti-dissimilar materials oil paint cracking groove 3, twice paint film will combine together, then once
Drying does not have to interlayer and polishes, and adhesive force has well solved dissimilar materials splicing interface oil paint cracking problem.It is different by resisting
Elastic silicone rubber in material oil paint cracking groove absorbs the thermal deformation stress of two sides dissimilar materials, avoids heterogeneous material
Oil paint cracking problem after the biggish two kinds of materials spray painting of material especially thermal expansion coefficient difference.
High reliablity.The present invention is by the elastic silicone rubber in anti-dissimilar materials oil paint cracking groove, by the heterogeneous material in two sides
Material be isolated, dissimilar materials difference in height gentle transition, improve appearance looks elegant degree；Pass through confrontation dissimilar materials paint
The interior filling bonding of the groove that cracks, watertight elastic silicone rubber, realize front surface waterproofing, improve antenna array presentation quality
With the reliability of extended protection energy force-summing device long-term work, PTFE base antenna array is effectively prevented in long-term high/low temperature, wet
Under the environmental conditions such as heat, because surface and interface caused by the inconsistent bring environmental stress of thermal expansion coefficient between dissimilar material paints
Cracking, falls off at bulge, improves PTFE substrate surface wettability using plasma treatment before painting, solves due to PTFE base
Plate is integral by assembly splicing with metallic carrier, exists in splicing interface and is uneven, and paints and produces after dissimilar materials splicing
Raw be uneven problem of appearance and PTFE base antenna array surface waterproofing problem.Antenna array table is improved for solving such
The long-term reliability of face coat.
Detailed description of the invention
It for a clearer understanding of the present invention, now will through the embodiment of the present invention, referring concurrently to attached drawing, to describe this hair
It is bright, in which:
The diagrammatic cross-section of the heterogeneous material splicing of PTFE base antenna array is shown in Fig. 1；
Fig. 2 is process flow chart of the invention.
Fig. 3 is the typical effect picture in kind of the anti-dissimilar materials oil paint cracking of PTFE base antenna array.
In Fig. 1: 1 metallic carrier, 2 PTFE medium substrates, 3 anti-dissimilar materials oil paint cracking grooves.
Specific embodiment
- Fig. 2 refering to fig. 1.According to the present invention, sandblasting be roughened PTFE medium substrate 2, reassemble splicing metallic carrier 1 with
PTFE medium substrate 2；Antenna array metallic carrier 1 connect with PTFE medium substrate 2 interconnection splicing circle seam at processing it is anti-
Dissimilar materials oil paint cracking groove 3；Ion processing activates face to be painted and carries out surface cleaning；Then with wet on wet technique pair
It is carried out at paint spraying on metallic carrier 1, PTFE medium substrate 2 and anti-dissimilar materials oil paint cracking groove 3 on antenna array
Reason, then resisting filling in heterogeneous material oil paint cracking groove (3) to have bonding, the elasticity of waterproof performance using automatic dropping glue equipment
Silicon rubber, and deaeration co-curing is carried out to silicon rubber.
In an alternate embodiment of the invention, using following step:
A. the anti-dissimilar materials oil paint cracking groove 3 of processing, the groove two sides at the boundary surface of antenna array dissimilar materials interconnection
Respectively metallic carrier 1 and PTFE medium substrate 2；
B. to entire PTFE base antenna array, that is, PTFE medium substrate 2, metallic carrier 1 and anti-dissimilar materials oil paint cracking groove 3
Face to be painted is activated using ion processing；
The wet on wet technique of second is sprayed with that antenna array (i.e. metal when C. doing solid work not yet using first of paint film
Carrier (1), PTFE medium substrate 2 and anti-dissimilar materials oil paint cracking groove 3 carry out paint spraying processing；
D. it is filled in anti-dissimilar materials oil paint cracking groove 3 using automatic dropping glue equipment and has bonding, the elasticity of waterproof performance
Silicon rubber.
In the anti-dissimilar materials oil paint cracking embodiment of the method for a kind of PTFE base antenna array given below, mainly include
Two structure composition, process implementing component parts.
In terms of structure composition, the PTFE base antenna array of anti-dissimilar materials oil paint cracking mainly includes the metal of antenna array
Carrier (1), the PTFE medium substrate 2 being assemblied on metallic carrier are located at metallic carrier 1 and 2 interface of PTFE medium substrate
Anti- dissimilar materials oil paint cracking groove 3, and in groove filling and real-time cure the bullet for having bonding, water-tight function
Property silicon rubber.Metallic carrier 1 is aluminium alloy or other metal materials, stratum and machinery as entire PTFE base antenna array
Mounting structure；PTFE medium substrate 2 is the multilayer printed circuit board based on nonmetallic materials PTFE；Anti- dissimilar materials paint
The groove 3 that cracks is that depth is identical as PTFE dielectric substrate thickness, 1.5~2mm wide, and bottom is the groove of arc-shaped, the groove position
On the interface of metallic carrier 1 and PTFE medium substrate 2, the left and right sides is respectively metallic carrier 1 and PTFE medium substrate 2；Position
In the crucial composition that the silicon rubber in anti-dissimilar materials oil paint cracking groove is anti-dissimilar materials oil paint cracking, have bonding, water
The characteristics of close, elastic, room temperature curing.
In terms of process implementing, specifically include that PTFE medium substrate 2 the sandblasting of paint face roughening, then with metallic carrier 1
Assembly；Anti- dissimilar materials oil paint cracking groove is machined into the splicing interface of metallic carrier 1 and PTFE medium substrate 2
3；Plasma treatment is done to the paint face of PTFE medium substrate 2；It include metal to PTFE base antenna array using wet on wet technique
Carrier 1, PTFE medium substrate 2, anti-3 surface lacquer of dissimilar materials oil paint cracking groove；Using automatic dropping glue equipment resist it is heterogeneous
Filling has an elastic silicone rubber of bonding, waterproof performance in material oil paint cracking groove 3, and to after elastic silicone rubber deaeration from
The conformal curing molding of silicon rubber and groove is realized in so solidification.It is achieved in the anti-dissimilar materials paint of PTFE base antenna array
Crack effect.
Optional specific steps specifically include that the paint face of PTFE medium substrate 2 is roughened using sandblasting, and clean up；
PTFE medium substrate 2 is assembled on metallic carrier 1 using welding or screw threads for fastening；Metallic carrier 1 is pressed using mechanical processing technique
Anti- dissimilar materials oil paint cracking groove 3 and clean is processed with the splicing interface shape of PTFE medium substrate 2, is resisted heterogeneous
Material oil paint cracking groove 3 is depth identical as 2 thickness of PTFE medium substrate, 1.5~2mm wide, bottom are the recessed of arc-shaped
Slot, the groove are located on the interface of metallic carrier 1 and PTFE medium substrate 2, and the left and right sides is respectively metallic carrier 1 and PTFE
Medium substrate 2；To entire PTFE base antenna array, that is, PTFE medium substrate 2, metallic carrier 1 and anti-dissimilar materials oil paint cracking
Plasma treatment is done in the paint face of groove 3, and plasma process parameters are as follows: plasma process parameters setting, gaseous species oxygen
Gas, gas flow 900L/h, plant capacity 5000W, cooling time 35min, system vacuum 30Pa, plasma processing time
40min.Using wet on wet technique to PTFE base antenna array (including metallic carrier 1, PTFE medium substrate 2, anti-dissimilar materials
3 surface lacquer of oil paint cracking groove；Automatic dropping glue equipment noncontact jetting technology is controlled using microcomputer digital, it is automatic to examine
It surveys height and adjusts glue spraying height, filling has the flexible silicon rubber of high-adhesive-strength in anti-dissimilar materials oil paint cracking groove 3
Glue.Using the own characteristic of high-strength silicone rubber, seal groove depth glue laminated power, syringe needle rate travel, syringe needle plastic emitting sound are calculated
Between seasonable and filler track, full-automatic online glue spraying；It is complete to reach automatically dropping glue filler track and seal groove top view track
Full weight is closed, filler depth and seal groove effect with equally height；Start in 2min after dispensing using vacuum defoamation equipment
Vacuum defoamation processing, treatment process parameter are as follows: vacuum degree≤100Pa, dwell time are carried out to the filling glue in seal groove
Naturally standard atmospheric pressure is deflated to after 3min-5min, then holding point glue surface level is upward, horizontal by PTFE base antenna array
It is placed on draughty clean station, hangs >=72h under room temperature.
Above in conjunction with attached drawing to the present invention have been described in detail, it is to be noted that being described in examples detailed above
Preferred embodiment only of the invention, is not intended to restrict the invention, for those skilled in the art, the present invention
There can be a various modifications and variations, for example process flow and processing sequence can be changed in conjunction with concrete implementation, can select and set knowledge
Different parameters during not realize technical method of the invention.All within the spirits and principles of the present invention, made
What modification, equivalent replacement, improvement etc., should be included within scope of the presently claimed invention.
Claims (9)
1. a kind of method of the heterogeneous material splicing seams oil paint cracking of anti-PTFE base antenna array, it is characterised in that include the following steps:
Sandblasting is roughened PTFE medium substrate (2), reassembles splicing metallic carrier (1) and PTFE medium substrate (2)；In the gold of antenna array
Belong to carrier (1) connect with PTFE medium substrate (2) interconnection splicing circle seam at process anti-dissimilar materials oil paint cracking groove (3)；
Ion processing activates face to be painted and carries out surface cleaning；Then with wet on wet technique to metallic carrier on antenna array (1),
PTFE medium substrate (2) and anti-dissimilar materials oil paint cracking groove (3)) on carry out paint spraying processing, then use automatically dropping glue
Equipment in the elastic silicone rubber for resisting filling in heterogeneous material oil paint cracking groove (3) to have bonding, waterproof performance, and to silicon rubber into
Row deaeration co-curing.
2. the method for the heterogeneous material splicing seams oil paint cracking of anti-PTFE base antenna array according to claim 1, feature exist
In: when first of paint film is done solid work not yet, i.e. metallic carrier of the wet on wet technique to antenna array of second is sprayed with that
(1), PTFE medium substrate (2) and anti-dissimilar materials oil paint cracking groove (3)) carry out paint spraying processing.
3. the method for the heterogeneous material splicing seams oil paint cracking of anti-PTFE base antenna array according to claim 1, feature exist
In: using automatic dropping glue equipment, filling has bonding, the flexible silicon of waterproof performance in anti-dissimilar materials oil paint cracking groove (3)
Rubber.
4. the method for the heterogeneous material splicing seams oil paint cracking of anti-PTFE base antenna array according to claim 1, feature exist
In: in terms of structure composition, the PTFE base antenna array of anti-dissimilar materials oil paint cracking mainly includes that the metal of antenna array carries
Body (1), the PTFE medium substrate (2) being assemblied on metallic carrier are located at metallic carrier (1) and PTFE medium substrate (2) interface
The anti-dissimilar materials oil paint cracking groove (3) at place, and filling and real-time cure have bonding, water-tight function in groove
Elastic silicone rubber.
5. the method for the heterogeneous material splicing seams oil paint cracking of anti-PTFE base antenna array according to claim 1, feature exist
In: metallic carrier (1) is aluminium alloy or other metal materials, stratum and mechanical erection knot as entire PTFE base antenna array
Structure；PTFE medium substrate (2) is the multilayer printed circuit board based on nonmetallic materials PTFE；Anti- dissimilar materials oil paint cracking is recessed
Slot (3) is that depth is identical as PTFE dielectric substrate thickness, 1.5~2mm wide, and bottom is the groove of arc-shaped, which is located at gold
On the interface for belonging to carrier (1) and PTFE medium substrate (2), the left and right sides is respectively metallic carrier (1) and PTFE medium substrate
(2)；Silicon rubber in anti-dissimilar materials oil paint cracking groove is the crucial composition of anti-dissimilar materials oil paint cracking.
6. the method for the heterogeneous material splicing seams oil paint cracking of anti-PTFE base antenna array according to claim 1, feature exist
In: the method for the anti-heterogeneous material splicing seams oil paint cracking of PTFE base antenna array according to claim 1, it is characterised in that:
The method of the heterogeneous material splicing seams oil paint cracking of anti-PTFE base antenna array according to claim 1, it is characterised in that:
In terms of process implementing, the paint face sandblasting roughening of PTFE medium substrate (2) is specifically included that, then assemble with metallic carrier (1)；
Anti- dissimilar materials oil paint cracking groove is machined into the splicing interface of metallic carrier (1) and PTFE medium substrate (2)
(3)；Plasma treatment is done to the paint face of PTFE medium substrate (2)；Using wet on wet technique to PTFE base antenna array, including
Metallic carrier (1), PTFE medium substrate (2), anti-dissimilar materials oil paint cracking groove (3)) surface lacquer；It is set using automatically dropping glue
The standby filling in anti-dissimilar materials oil paint cracking groove (3) has the elastic silicone rubber of bonding, waterproof performance, and to flexible silicon rubber
The conformal curing molding of silicon rubber and groove is realized in spontaneous curing after glue deaeration.
7. the method for the heterogeneous material splicing seams oil paint cracking of anti-PTFE base antenna array according to claim 1, feature exist
In: the paint face of PTFE medium substrate (2) is roughened using sandblasting, and is cleaned up；PTFE medium substrate (2) is using welding or spiral shell
Line fastening is assembled on metallic carrier (1)；The spelling of metallic carrier (1) and PTFE medium substrate (2) is pressed using mechanical processing technique
Border face shape processing goes out anti-dissimilar materials oil paint cracking groove (3) and clean, anti-dissimilar materials oil paint cracking groove (3)
Identical as PTFE medium substrate (2) thickness for depth, which is located at the interface of metallic carrier (1) Yu PTFE medium substrate (2)
On, the left and right sides is respectively metallic carrier (1) and PTFE medium substrate (2).
8. the method for the heterogeneous material splicing seams oil paint cracking of anti-PTFE base antenna array according to claim 1, feature exist
In: to entire PTFE base antenna array, that is, PTFE medium substrate (2), metallic carrier (1) and anti-dissimilar materials oil paint cracking groove
(3) plasma treatment is done in paint face, and plasma process parameters include: plasma process parameters setting, gaseous species oxygen, gas
Body flow 900L/h, plant capacity 5000W, are greater than 35min cooling time, system vacuum 30Pa, and plasma processing time is big
In 40min.
9. the method for the heterogeneous material splicing seams oil paint cracking of anti-PTFE base antenna array according to claim 1, feature exist
In: using wet on wet technique to PTFE base antenna array, including metallic carrier (1), PTFE medium substrate (2), anti-dissimilar materials
Oil paint cracking groove (3)) surface lacquer；Automatic dropping glue equipment noncontact jetting technology is controlled using microcomputer digital, automatically
Detection height and adjusting glue spraying height, filling has the elasticity of high-adhesive-strength in anti-dissimilar materials oil paint cracking groove (3)
Silicon rubber；Using the own characteristic of high-strength silicone rubber, calculates seal groove depth glue laminated power, syringe needle rate travel, syringe needle and go out
Glue response time and filler track, full-automatic online glue spraying；Reach automatically dropping glue filler track and seal groove top view rail
Mark is completely coincident, filler depth and seal groove effect with equally height；Start in 2min after dispensing using vacuum defoamation
Equipment carries out vacuum defoamation processing, treatment process parameter are as follows: vacuum degree≤100Pa, dwell time to the filling glue in seal groove
Naturally standard atmospheric pressure is deflated to after 3min-5min, then upward, PTFE base antenna array level is put for holding point glue surface level
It sets on draughty clean station, hangs >=72h under room temperature.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910094602.0A CN109786979A (en) | 2019-01-31 | 2019-01-31 | The method of the anti-heterogeneous material splicing seams oil paint cracking of PTFE base antenna array |
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| CN201910094602.0A CN109786979A (en) | 2019-01-31 | 2019-01-31 | The method of the anti-heterogeneous material splicing seams oil paint cracking of PTFE base antenna array |
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| CN107201491A (en) * | 2017-05-17 | 2017-09-26 | 扬州大学 | A kind of preparation method of drilling riser sleeve pipe electric arc spraying protective coating |
| CN109277769A (en) * | 2018-09-30 | 2019-01-29 | 常州市泽宸电子有限公司 | A kind of method for repairing and mending of pump case |
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN88102893A (en) * | 1987-05-13 | 1988-11-30 | 艾尔坎国际有限公司 | The resistance welded of aluminium |
| EP1183973A1 (en) * | 2000-08-31 | 2002-03-06 | Sebastian Berger | Device to treat a fruit (banana) |
| JP2013246188A (en) * | 2012-05-23 | 2013-12-09 | Yamaha Corp | White key of keyboard instrument |
| CN103009713A (en) * | 2012-11-28 | 2013-04-03 | 梅州市志浩电子科技有限公司 | Thermal compression bonding copper-clad plate by adopting polymethyl methacrylate as medium, printed circuit board as well as manufacturing method thereof |
| CN203032024U (en) * | 2012-11-28 | 2013-07-03 | 梅州市志浩电子科技有限公司 | Hot-pressed copper-clad board and printed circuit board adopting polymethyl methacrylate as medium |
| CN107201491A (en) * | 2017-05-17 | 2017-09-26 | 扬州大学 | A kind of preparation method of drilling riser sleeve pipe electric arc spraying protective coating |
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