KR100341791B1 - A Manufacturing method using diecasting of antenna bracket for a wireless celluar phone - Google Patents
A Manufacturing method using diecasting of antenna bracket for a wireless celluar phone Download PDFInfo
- Publication number
- KR100341791B1 KR100341791B1 KR1019990031000A KR19990031000A KR100341791B1 KR 100341791 B1 KR100341791 B1 KR 100341791B1 KR 1019990031000 A KR1019990031000 A KR 1019990031000A KR 19990031000 A KR19990031000 A KR 19990031000A KR 100341791 B1 KR100341791 B1 KR 100341791B1
- Authority
- KR
- South Korea
- Prior art keywords
- thickness
- plating
- antenna bracket
- manufacturing
- tapping
- Prior art date
Links
- 238000004512 die casting Methods 0.000 title claims abstract description 9
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 9
- 238000007747 plating Methods 0.000 claims abstract description 25
- 238000010079 rubber tapping Methods 0.000 claims abstract description 14
- 238000005498 polishing Methods 0.000 claims abstract description 10
- 239000000126 substance Substances 0.000 claims abstract description 10
- 239000007788 liquid Substances 0.000 claims abstract description 8
- 229910001297 Zn alloy Inorganic materials 0.000 claims abstract description 4
- 238000005260 corrosion Methods 0.000 claims abstract 2
- 230000007797 corrosion Effects 0.000 claims abstract 2
- 238000000034 method Methods 0.000 claims description 6
- SBZXBUIDTXKZTM-UHFFFAOYSA-N diglyme Chemical compound COCCOCCOC SBZXBUIDTXKZTM-UHFFFAOYSA-N 0.000 claims 1
- 229910001369 Brass Inorganic materials 0.000 description 3
- 239000010951 brass Substances 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 229910001229 Pot metal Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D21/00—Casting non-ferrous metals or metallic compounds so far as their metallurgical properties are of importance for the casting procedure; Selection of compositions therefor
- B22D21/02—Casting exceedingly oxidisable non-ferrous metals, e.g. in inert atmosphere
- B22D21/027—Casting heavy metals with low melting point, i.e. less than 1000 degrees C, e.g. Zn 419 degrees C, Pb 327 degrees C, Sn 232 degrees C
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
- B23G1/00—Thread cutting; Automatic machines specially designed therefor
- B23G1/16—Thread cutting; Automatic machines specially designed therefor in holes of workpieces by taps
- B23G1/18—Machines with one working spindle
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/34—Pretreatment of metallic surfaces to be electroplated
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
- H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Computer Networks & Wireless Communication (AREA)
- Waveguide Aerials (AREA)
- Chemically Coating (AREA)
- Support Of Aerials (AREA)
Abstract
본 발명은 아연합금을 다이캐스팅으로 성형하여 태핑으로 중앙 나사공을 천공한후 화학연마액 처리로서 노출된 제품표면과 중앙 나사공의 내주연을 도금층의 두께에 해당되는 10 - 12 미크론 두께로 일정하게 부식시키고 Cu 하지도금과 함께필요에 의해 Ni 도금이나 또는 Ni + Au 도금을 실시하여 화학연마액으로서 부식된 두께정도의 도금층을 적층시켜서 된 무선전화기용 안테나 브래킷의 다이캐스팅에 의한 제조방법.According to the present invention, zinc alloy is formed by die casting to punch the central threaded hole by tapping, and then the exposed surface of the product and the inner circumferential edge of the central threaded hole as chemical polishing solution are uniformly set to a thickness of 10-12 microns corresponding to the thickness of the plating layer. A method of manufacturing by die-casting an antenna bracket for a radiotelephone in which a plating layer having a thickness of corroded thickness as a chemical polishing liquid is formed by performing corrosion by Ni plating or Ni + Au plating as necessary with Cu plating.
Description
본 발명은 무선전화기의 안테나를 내부에서 메탈(Metal)과 함께 고정시키면서 송,수신회로와 접속되는 안테나 브래킷을 다이캐스팅으로 성형하여 태핑(Tapping)한후 화학연마액으로 처리하여 도금하는 무선전화기용 안테나 브래킷의 다이캐스팅에 의한 제조방법에 관한 것이다.The present invention is fixed to the antenna of the radiotelephone with a metal (metal) inside the antenna bracket for radiotelephones to be plated by chemical polishing liquid after tapping (tapping) by forming the antenna bracket connected to the transmission and reception circuit by die casting It relates to a manufacturing method by die casting.
지금까지의 안테나 브래킷의 제조방법은 황동을 선반 및 밀링으로 절삭가공하여 중앙을 태핑으로 나사공을 천공한 후 전압 정재파비(V S W R)와 임피이던스(Impedance) 확보를 위해 안테나 브래킷에 Ni, Au 의 전기도금을 하는데 이때 전기도금으로 인한 도금층의 두께로 태핑한 나사공의 내경이 좁아져서 안테나와 상호 결합시 나사결합이 안되므로 도금후 필히 2차 태핑으로 내주연 도금층의 일부를 밀어내는 방법으로 내경을 확대하여야 되므로 절삭 가공방법으로 생산량이 한정되고 복잡한 작업공정으로 인해 제조원가가 상승되었고 특히 안테나를 고정하여 송,수신회로와 접속되는 안테나 브래킷의 중앙 나사공에 도금된 수개의 도금층이 2차 태핑으로 일부가 훼손됨에 따라서 도금층으로 인한 소기의 전도목적을 달성할수 없는 폐단이 발생하였다.Until now, the manufacturing method of the antenna bracket has been cutting brass by lathe and milling, drilling the screw hole by tapping the center, and then applying Ni, Au to the antenna bracket to secure voltage standing wave ratio (VSWR) and impedance. At this time, the inner diameter of the screw hole tapping with the thickness of the plating layer due to electroplating becomes narrow, and screwing is not possible when mutually coupling with the antenna. Therefore, after plating, the inner diameter is enlarged by pushing a part of the inner peripheral plating layer by secondary tapping. The production process was limited due to the cutting process, and the manufacturing cost was increased due to the complicated work process.In particular, several plating layers plated in the center screw hole of the antenna bracket connected to the transmitting and receiving circuit by fixing the antenna were partially removed by secondary tapping. As it is damaged, a closed end cannot be achieved due to the plating layer to achieve the desired conductive purpose.
본 발명에서는 이와 같은 문제점을 개선하기 위하여 안테나 브래킷의 재료를 황동보다 내충격성이 1.7배 강한 아연합금(ZnDC2)을 재료로 하여 다이캐스팅으로 성형(a)하여 대량 생산이 가능토록 하고 태핑으로 중앙 나사공을 천공한후 화학연마액으로서 노출된 제품표면과 중앙 나사공의 내주연을 도금층의 두께에 해당되는 10 - 12 미크론 두께로 일정하게 부식(b)시키고 Cu 하지도금과 함께 필요에 의해 Ni 도금이나 또는 Ni + Au 도금을 실시하여 화학연마액으로서 부식된 두께정도의 도금층을 적층시키므로서 다이캐스팅으로 성형한 안테나 브래킷의 규격 그대로에 중앙 나사공도 태핑한 내경 치수 거의 그대로 적층되므로 2차 태핑작업이 필요없을뿐만 아니라 필요에 의해 도금한 수개의 도금층이 그대로 유지되므로서 임피이던스와 전압 정재피비를 만족시킬수가 있는 것으로 이를 제조공정에 의거 상세히 설명하면 다음과 같다.In the present invention, in order to improve such a problem, the material of the antenna bracket is formed by die casting using a zinc alloy (ZnDC2), which is 1.7 times stronger than brass, so that mass production is possible and tapping is performed by tapping the center screw hole. After drilling, the exposed surface of the product and the inner circumference of the central threaded hole as a chemical polishing liquid are constantly corroded (b) to a thickness of 10-12 microns corresponding to the thickness of the plating layer. Alternatively, by applying Ni + Au plating, the plating layer of the corroded thickness is laminated as a chemical polishing liquid, and the inner diameter of the center screw hole tapping is almost as it is. In addition, several plating layers plated as needed are maintained as it is, satisfying impedance and voltage standing ratio. If it can be described in detail based on the manufacturing process as follows.
도 1은 본 발명의 사용상태를 보인 부분확대 종단면도1 is a partially enlarged longitudinal sectional view showing a state of use of the present invention;
도 2는 본 발명에서 안테나 브래킷을 성형하여 화학연마액으로 부식시킨Figure 2 is molded in the antenna bracket in the present invention to corrode with chemical polishing liquid
상태를 보인 확대 종단면도Enlarged longitudinal cross-sectional view showing the state
제 1공정1st process
아연합금(ZnDC2)을 복수 구동 다이캐스팅으로 1분당 80 - 120개 정도로 대량 생산하여 그 중앙을 태핑으로 필요규격의 나사공으로 천공시킨다.Zinc alloy (ZnDC2) is mass-produced with 80-120 pieces per minute by plural drive die casting, and the center is punched to the required size by tapping the center.
제 2공정2nd process
중앙에 나사공이 천공된 안테나 브래킷을 다이글림(Dygleam) 80의 화학연마액으로 32℃ 온도에서 30 - 40초간 처리하여 10 - 12미크론 정도 두께로 노출된 표면과 중앙 나사공의 내주연을 일정하게 부식시킨다The antenna bracket with a screw hole in the center is treated with Dygleam 80's chemical polishing solution at 32 ℃ for 30-40 seconds to uniformly expose the inner circumference of the exposed surface and the center screw hole with a thickness of about 10 to 12 microns. Corrode
제 3공정3rd process
이렇게 안테나 브래킷의 노출된 표면과 중앙 나사공의 내주연이 부식되면 도금층의 밀착성이 좋아져서 도금효과가 개선되므로 이러한 상태의 안테나 브래킷을 처음에는 Cu 하지도금을 한후 전압 정재파비(V S W R)를 위해 Ni 도금을 하면 표면과 중앙 나사공에 10 - 12 미크론 두께의 도금층이 형성되고 그 위에 다시 임피이던스 (Impedance)를 위해 Au 도금을 하면 10.3 - 12.5 미크론 두께의 도금층이 형성된다.When the exposed surface of the antenna bracket and the inner circumference of the center screw hole are corroded, the adhesion of the plating layer is improved and the plating effect is improved. Therefore, the antenna bracket in this state is initially plated with Cu, and then Ni is applied for the voltage standing wave ratio (VSWR). When plating, a 10-12 micron thick plated layer is formed on the surface and the central threaded hole, and Au plating is formed on the surface again for impedance to form a 10.3-12.5 micron thick plated layer.
이와 같은 공정으로 제조된 본 발명은 황동보다 내충격성이 1.7배 강한 아연합금을 다이캐스팅으로 성형하므로서 대량 생산이 가능하고 태핑으로 중앙 나사공을 가공하여 화학연마액으로서 안테나 브래킷의 노출된 표면과 중앙 나사공을 도금층 두께에 해당하는 두께로 부식시키므로서 도금층의 밀착성을 강화시킬뿐만 아니라 필요로 하는 도금으로 수개의 도금층을 적층시키면 안테나 브래킷의 외형크기는 물론이고 중앙 나사공의 내경크기가 표준규격과 거의 일치되므로서 종래처럼 2차태핑의 가공이 필요가 없이 수개의 도금층이 그대로 유지가 되므로 내충격성과 전압 정재파비 그리고 임피이던스를 만족시킬수가 있는 것이다.The present invention manufactured by such a process can be mass-produced by molding die-cast zinc alloy 1.7 times stronger than brass, and the center screw hole is processed by tapping to expose the exposed surface and the center of the antenna bracket as chemical polishing liquid. By not only strengthening the adhesion of the plating layer by corroding the pores to the thickness corresponding to the thickness of the plating layer, but also by stacking several plating layers with the required plating, the internal diameter of the center screw hole as well as the outer diameter of the antenna bracket are almost equal to the standard specification. As a result, several plating layers are maintained without the need for the processing of secondary tapping as in the prior art, thereby satisfying the impact resistance, the voltage standing wave ratio, and the impedance.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019990031000A KR100341791B1 (en) | 1999-07-29 | 1999-07-29 | A Manufacturing method using diecasting of antenna bracket for a wireless celluar phone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019990031000A KR100341791B1 (en) | 1999-07-29 | 1999-07-29 | A Manufacturing method using diecasting of antenna bracket for a wireless celluar phone |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR20010011571A KR20010011571A (en) | 2001-02-15 |
| KR100341791B1 true KR100341791B1 (en) | 2002-06-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019990031000A KR100341791B1 (en) | 1999-07-29 | 1999-07-29 | A Manufacturing method using diecasting of antenna bracket for a wireless celluar phone |
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| Country | Link |
|---|---|
| KR (1) | KR100341791B1 (en) |
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1999
- 1999-07-29 KR KR1019990031000A patent/KR100341791B1/en not_active IP Right Cessation
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| Publication number | Publication date |
|---|---|
| KR20010011571A (en) | 2001-02-15 |
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