CN104882678B - Ka wave band parabola antenna heat treatment methods - Google Patents
Ka wave band parabola antenna heat treatment methods Download PDFInfo
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- CN104882678B CN104882678B CN201510268892.8A CN201510268892A CN104882678B CN 104882678 B CN104882678 B CN 104882678B CN 201510268892 A CN201510268892 A CN 201510268892A CN 104882678 B CN104882678 B CN 104882678B
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- steel plate
- parabola
- heat treatment
- antenna
- salt solution
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 23
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 97
- 239000010959 steel Substances 0.000 claims abstract description 97
- 239000012266 salt solution Substances 0.000 claims abstract description 29
- 238000003825 pressing Methods 0.000 claims description 11
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 4
- 239000011780 sodium chloride Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 6
- 238000013461 design Methods 0.000 abstract description 2
- 230000005855 radiation Effects 0.000 abstract description 2
- 238000001816 cooling Methods 0.000 description 13
- 238000012545 processing Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 239000012267 brine Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 150000003839 salts Chemical class 0.000 description 5
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 5
- 238000007493 shaping process Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000008602 contraction Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910001566 austenite Inorganic materials 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 229910000734 martensite Inorganic materials 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910001335 Galvanized steel Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 239000008397 galvanized steel Substances 0.000 description 1
- 238000001027 hydrothermal synthesis Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The invention discloses a kind of Ka wave bands parabola antenna heat treatment method, including：Steel plate is shaped to parabola steel plate in a mold；The mould equipped with the parabola steel plate is placed in salt solution and is heat-treated；By matched moulds presses the parabola steel plate again after the mould die sinking after the heat treatment.Preferably, when atrocious weather changes, the rising-heat contracting-cold coefficient of antenna steel material becomes minimum to the rigidity of the obtained parabola antenna of method of the present invention, ensure that the directionality of Antenna Design, high focused radiation, and low is disturbed characteristic.
Description
Technical field
The invention belongs to parabola antenna manufacturing technology field, and in particular to a kind of Ka wave bands parabola antenna heat treatment side
Method.
Background technology
Antenna system is the headend equipment of the multifunctional electronic whole set equipment such as radar, satellite communication, radio astronomy.High accuracy
Antenna is the key equipment of antenna system, especially for high band antenna as Ka wave bands.The precision and work of antenna reflective face
Working frequency is relevant, usually requires that the maximum δ of Ka wave band antenna reflector precisions should be less than λ/32.(by taking 30GHz as an example, 10/32
=0.3125mm) much require high than Ku wave band and C-band.Antenna reflective face material selection on certainly will consider these because
Element.Reflecting surface must use the materials such as corrosion-resistant material, iron, stainless steel, aluminium, copper, fiberglass, carbon fiber and application scenario
Difference, cost also have very big difference.The cost factor of consideration and durable factor, general occasion select galvanized steel plain sheet.But steel plate
Rigidly be deteriorated after stress and deformation because when steel plate is in stress bend tension molecule be squeezed produce heat, caused heat effect
Make rigidly to be deteriorated possessed by raw steel plate；Even if from the steel plate of the extremely low coefficient of resilience, after punching press deformation, its rigidity is also significantly
Reduce, influenceed by temperature and external force, its deformation becomes very big.
The content of the invention
A kind of above-mentioned deficiency for aiming to overcome that prior art of the embodiment of the present invention, there is provided Ka wave bands parabola antenna
Heat treatment method, the rigidity of parabola antenna can be improved, the coefficient of thermal expansion and contraction of parabola antenna is diminished.
In order to realize foregoing invention purpose, the technical scheme of the embodiment of the present invention is as follows：
A kind of Ka wave bands parabola antenna heat treatment method, including：
Steel plate is shaped to parabola steel plate in a mold；
The mould equipped with the parabola steel plate is placed in salt solution and is heat-treated；
By matched moulds presses the parabola steel plate again after the mould die sinking after the heat treatment.
The Ka wave band parabola antenna heat treatment methods of the embodiment of the present invention are by the way of being first molded and being heat-treated afterwards so that
The parabola steel plate being rigidly deteriorated after shaping improves rigidity by heat treatment, reduces coefficient of thermal expansion and contraction.Due to parabola
Antenna is high to the precision prescribed of shape, and method of the invention is heat-treated in a mold using the steel plate after shaping, passes through mould
The deformation of tool limitation and modification steel plate in heat treatment process, reduces influence of the heat treatment to the form accuracy of parabola antenna.
By the way that matched moulds presses the shape of the further modification parabola steel plate of processing of parabola steel plate again after heat treatment, expire its precision
Foot requires.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
The embodiments of the invention provide a kind of Ka wave bands parabola antenna heat treatment method.This method includes following step
Suddenly：
Step S10：Steel plate is shaped to parabola steel plate in a mold.
Step S20：Mould equipped with parabola steel plate is placed in salt solution and is heat-treated.
Step S30：By matched moulds presses parabola steel plate again after the mould die sinking after heat treatment.
Wherein, the step of step S10 is in the prior art, throwing is compressed to according to the processing request of parabola antenna by steel plate
Object plane steel plate.By steel plate stamping forming process in a mold, when the pressure force of moment causes steel plate stress bend tension,
Molecule, which is squeezed, produces heat, and the temperature of steel plate rises rapidly, and the temperature of the parabola steel plate after shaping is about 300 DEG C or so.
Directly the steel plate after shaping is taken out in die sinking in the prior art, steel plate is not heat-treated, so that steel plate is rigidly deteriorated,
It is yielding during use.Based on this, technical scheme carries out quenching heat treatment using step S20 to steel plate.
The solute of salt solution in step S20 is NaCl.The mass concentration of the salt solution is 20%~25%.Added in water suitable
The salt of amount, after high temperature workpiece is immersed the cooling medium, separate out the crystal of salt in steam mem stage and burst immediately, by steam
Film is destroyed, and the oxide skin of workpiece surface is also scraped, and can so improve cooling capacity of the medium in high-temperature region.By salt solution plus
Its fast vapor film breakage, so that steel plate obtains preferably tissue and hardness.Brine strength is bigger, and cooling velocity is faster, mistake
Cold degree increase, the driving force that austenite is changed into martensite is added, i.e. austenite is changed into strong, the phase of ability change of martensite
Paralympic amount should be reduced.But brine strength is nor be the bigger the better.Brine strength is bigger, and aggravation salt crystal separates out, and it is attached to
Surface of steel plate, cause small blast, boiling period is arrived ahead of time, so that steel plate is more easy to crack.Therefore, it is necessary to reasonable selection salt
The concentration of water.The present inventor passes through repeated tests, when the final mass concentration for determining salt solution is 20%~25%,
Not only cooling velocity is fast, and can preferably avoid the cracking of steel plate.
Because the steel plate of the present invention is before salt hydro-thermal process, its temperature is at 300 DEG C or so, therefore, technology of the invention
, it is necessary to which brine temp need to be controlled within 30 DEG C in scheme, otherwise the cooling velocity of steel plate is relatively low, and structural transformation is insufficient,
Lower hardness.But the temperature of salt solution can not be too low, in technical scheme, if the temperature of salt solution is less than 10, though
So be advantageous to improve cooling velocity, but too low temperature so that cooling velocity is excessive, hardening flaw easily occurs so that throw
The Quality Down of object plane steel plate.Therefore, the temperature of currently preferred salt solution is 10~30 DEG C.
The time of heat treatment is due to shape by material, cooling medium, chilling temperature and workpiece to be heated etc.
The limitation of many factors, accordingly, it is determined that the optimal cool time is extremely difficult.For technical scheme, due to
The special shape of parabola steel plate and the processing mode quenched in a mold, the selection of cool time are more difficult.Due to this hair
Bright technical scheme employs 10~30 DEG C of brine temp, is allowed to cool speed, for complex-shaped parabola steel
Plate, long heat treatment time should not be used, therefore, by heat treatment time control within 3min.Due to present invention employs
Steel plate is heat-treated in mould, and mould plays a part of delaying the process of heat transfer, makes the rate of temperature fall ratio of steel plate that steel plate is direct
The speed immersed in salt solution is slow.Therefore, to make structural transformation abundant, time of heat treatment also unsuitable too short, of the invention skill
Art scheme is controlled can meet demand in more than 2min.Therefore, currently preferred heat treatment time is 2~3min.
Step S20 limits and modified deformation of the steel plate in heat treatment process using being heat-treated in a mold, by mould,
Reduce influence of the heat treatment to the form accuracy of parabola antenna.If be heat-treated again after being directly removed from the molds steel plate, by
Longer in the time for being removed from the molds steel plate, this process, the heat of steel plate can scatter and disappear, i.e., the air cooling that steel plate can be slowly,
Effect caused by the heat treatment of the present invention is not had.Further, since the barrier of mould, mould, which can play, delays steel plate to cool
Effect, avoid steel plate cooling rate is too fast from cracking.Simultaneously because the barrier of mould, mould first cool, then make steel plate
Cool, mould causes to the retarding action of cooling compared with directly steel plate is entered in salt solution, the cooling of each position of steel plate
Speed is more homogeneous, avoids due to the precision of the steel plate shape of the Different Effects steel plate of cooling velocity everywhere.In addition, mould is close
Envelope acts on, and also make it that the speed that steel plate cools down everywhere is more homogeneous.
During mould equipped with parabola steel plate is placed in salt solution, it is preferred that the concave surface of parabola steel plate is advanced
Enter in salt solution, enter behind the convex surface of parabola steel plate in salt solution.Due to being filled with air, the heat conduction of solid in paraboloidal concave surface
Rate is higher than the thermal conductivity of gas.This into by way of salt solution, even if concave surface is introduced into salt solution, due to gas in concave surface
Rate of heat transfer it is slow so that the rear steel plate on convex surface and the steel plate of concave surface into salt solution keeps similar cooling speed as much as possible
Degree, so that the cooling velocity of steel plate everywhere is homogeneous, be advantageous to keep the precision of the shape of steel plate.
In step S30, the time of matched moulds pressing parabola steel plate is 5~10s.Matched moulds pressing parabola steel plate pressure be
2.4×105~2.5 × 105.By the way that parabola steel is further modified in the processing of matched moulds pressing parabola steel plate again after heat treatment
The shape of plate, its precision is set to meet to require.The time of the pressing and pressure can realize the purpose to modifying plate profile, simultaneously
It will not cause the temperature of steel plate raises again to cause rigid decline because of pressing time is oversize again.
In summary, the parabola antenna after the method processing by the present invention, rigidity preferably, change in atrocious weather
When, the coefficient of thermal expansion and contraction of antenna steel material becomes minimum, ensure that the directionality of Antenna Design, high focused radiation, and
Low is disturbed characteristic.
Technical scheme is described further with specific embodiment below.
Embodiment 1
Steel plate is shaped to parabola steel plate in a mold.Then the mould equipped with parabola steel plate is placed in mass concentration
For 20%, temperature is to be heat-treated 3min in 20 DEG C of salt solution.2.4 × 10 after finally the mould after heat treatment is molded5Pressure
Matched moulds pressing parabola steel plate 7s under power.The performance of the parabola antenna finally given is as shown in table 1.
Embodiment 2
Steel plate is shaped to parabola steel plate in a mold.Then the mould equipped with parabola steel plate is placed in mass concentration
For 25%, temperature is to be heat-treated 3min in 10 DEG C of salt solution.2.5 × 10 after finally the mould after heat treatment is molded5Pressure
Matched moulds pressing parabola steel plate 5s under power.The performance of the parabola antenna finally given is as shown in table 1.
Embodiment 3
Steel plate is shaped to parabola steel plate in a mold.Then the mould equipped with parabola steel plate is placed in mass concentration
For 22%, temperature is to be heat-treated 2.5min in 15 DEG C of salt solution.2.43 × 10 after finally the mould after heat treatment is molded5's
Matched moulds pressing parabola steel plate 8s under pressure.The performance of the parabola antenna finally given is as shown in table 1.
Embodiment 4
Steel plate is shaped to parabola steel plate in a mold.Then the mould equipped with parabola steel plate is placed in mass concentration
For 24%, temperature is to be heat-treated 2min in 30 DEG C of salt solution.2.45 × 10 after finally the mould after heat treatment is molded5Pressure
Matched moulds pressing parabola steel plate 6s under power.The performance of the parabola antenna finally given is as shown in table 1.
Embodiment 5
Steel plate is shaped to parabola steel plate in a mold.Then the mould equipped with parabola steel plate is placed in mass concentration
For 20%, temperature is to be heat-treated 2.5min in 25 DEG C of salt solution.2.4 × 10 after finally the mould after heat treatment is molded5's
Matched moulds pressing parabola steel plate 10s under pressure.The performance of the parabola antenna finally given is as shown in table 1.
Comparative example 1
Parabola antenna is prepared using prior art, i.e., the antenna pressed in a mold is without technical solution of the present invention
Step S20 and step S30 processing enter directly into subsequent processing.The performance of the parabola antenna finally given is as shown in table 1.
The performance of the parabola antenna of table 1
In table 1, in gain ± 0.3dB, the frequency of transmitting is 29.75GHz, and the gain of standard effect is 44.8dBi；Receive
Frequency be 19.70GHz, the gain of standard effect is 41.2dBi.In 3dB beam angles, the power of transmitting is 29.75GHz,
Standard angle is 0.7 °, and the frequency of reception is 19.70GHz, and standard angle is 1.1 °.
From the results shown in Table 1, the measured value of the parabola antenna obtained using the inventive method is closer to mark
Quasi- value, and with the change of temperature, its fluctuation is smaller.This shows that the rigidity of the parabola antenna of the present invention is good, and it expands with heat and contract with cold
Coefficient it is small, temperature the precision of the shape of parabola antenna is influenceed it is smaller so that the performance of the parabola antenna is more
It is stable and accurate.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., all should be included within protection scope of the present invention.
Claims (5)
- A kind of 1. Ka wave bands parabola antenna heat treatment method, it is characterised in that including：Steel plate is shaped to parabola steel plate in a mold；The mould equipped with the parabola steel plate is placed in salt solution and is heat-treated, wherein, the concave surface of the parabola steel plate It is introduced into the salt solution, enters behind the convex surface of the parabola steel plate in the salt solution；By matched moulds presses the parabola steel plate again after the mould die sinking after the heat treatment.
- 2. Ka wave bands parabola antenna heat treatment method as claimed in claim 1, it is characterised in that：The solute of the salt solution is NaCl, the mass concentration of the salt solution is 20%~25%.
- 3. Ka wave bands parabola antenna heat treatment method as claimed in claim 1, it is characterised in that：The temperature of the salt solution is 10~30 DEG C.
- 4. Ka wave bands parabola antenna heat treatment method as claimed in claim 1, it is characterised in that：The time of the heat treatment For 2~3min.
- 5. Ka wave bands parabola antenna heat treatment method as claimed in claim 1, it is characterised in that：Described in the matched moulds pressing The time of parabola steel plate is 5~10s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510268892.8A CN104882678B (en) | 2015-05-22 | 2015-05-22 | Ka wave band parabola antenna heat treatment methods |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510268892.8A CN104882678B (en) | 2015-05-22 | 2015-05-22 | Ka wave band parabola antenna heat treatment methods |
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| Publication Number | Publication Date |
|---|---|
| CN104882678A CN104882678A (en) | 2015-09-02 |
| CN104882678B true CN104882678B (en) | 2017-12-15 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1279522A (en) * | 2000-08-16 | 2001-01-10 | 北京超塑新技术有限公司 | Technology for shaping primary reflection surface of satellite communication antenna |
| EP1403391A1 (en) * | 2001-06-01 | 2004-03-31 | Sumitomo Metal Industries, Ltd. | Martensitic stainless steel |
| CN101265514A (en) * | 2008-05-14 | 2008-09-17 | 江南机器（集团）有限公司 | Composite heat treatment method for 30CrMnSiA steel thin wall spinning cylinder-shape element |
-
2015
- 2015-05-22 CN CN201510268892.8A patent/CN104882678B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1279522A (en) * | 2000-08-16 | 2001-01-10 | 北京超塑新技术有限公司 | Technology for shaping primary reflection surface of satellite communication antenna |
| EP1403391A1 (en) * | 2001-06-01 | 2004-03-31 | Sumitomo Metal Industries, Ltd. | Martensitic stainless steel |
| CN101265514A (en) * | 2008-05-14 | 2008-09-17 | 江南机器（集团）有限公司 | Composite heat treatment method for 30CrMnSiA steel thin wall spinning cylinder-shape element |
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| CN104882678A (en) | 2015-09-02 |
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