JPS61141300A - Diaphram for electro acoustic transducer - Google Patents
Diaphram for electro acoustic transducerInfo
- Publication number
- JPS61141300A JPS61141300A JP26412684A JP26412684A JPS61141300A JP S61141300 A JPS61141300 A JP S61141300A JP 26412684 A JP26412684 A JP 26412684A JP 26412684 A JP26412684 A JP 26412684A JP S61141300 A JPS61141300 A JP S61141300A
- Authority
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- Japan
- Prior art keywords
- alloy
- solution
- diaphram
- diaphragm
- aluminum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
Description
【発明の詳細な説明】 １」Ｌ」 本発明は、電気音響変換器用振動板に関する。[Detailed description of the invention] 1"L" The present invention relates to a diaphragm for an electroacoustic transducer.
ＬＬ［Ｌ
従来、電気音響変換器用振動板の材料としては、紙、ア
ルミニウム、チタン等が多く用いられている。LL [L Conventionally, paper, aluminum, titanium, etc. are often used as materials for diaphragms for electroacoustic transducers.
一般に金属材料を用いた振動板は内部損失が小さく高音
域において顕著な共振を生じ、周波数特性にも高いピー
ク点が認められ共振周波数付近では位相歪、高調波歪み
が著しく発生する。従って金属材料を振動板として用い
るには比弾性率の大きな材料を用いて広域共振行きを使
用帯域に影響を与えない周波数にまで移動させれば解決
するのであるがアルミニウムやチタンは比弾性率が余り
大きくないので広域共振点を高くできず再生帯域の狭い
電気音響変換器用振動板しか製作できなかった。In general, diaphragms made of metal materials have low internal loss and produce significant resonance in the high frequency range, and a high peak point is observed in the frequency characteristics, with significant phase distortion and harmonic distortion occurring near the resonance frequency. Therefore, using a metal material as a diaphragm can be solved by using a material with a high specific modulus of elasticity and moving the wide resonance to a frequency that does not affect the band of use, but aluminum and titanium have a high specific modulus of elasticity. Since it was not very large, it was not possible to raise the wide-range resonance point, and it was only possible to manufacture a diaphragm for an electroacoustic transducer with a narrow reproduction band.
また、比弾性率の大きな材料としてはアルミニウム−リ
チウム合金（以下Ａｌ−１−ｉ合金と記載する。）が知
られていたが、ｌｉの添加量が増す−に従い、その靭性
が大幅に低下してしまったり、化学的な活性が強くて不
安定なため電気音響変換器用振動板としては用いられて
いなかった。In addition, aluminum-lithium alloy (hereinafter referred to as Al-1-i alloy) was known as a material with a large specific modulus of elasticity, but as the amount of lithium added increases, its toughness decreases significantly. It was not used as a diaphragm for electroacoustic transducers because it was unstable due to strong chemical activity.
Ａｌ−１−ｉ合金と同様な合金としてＡｌ−Ｂｅ合金も
あるが、これはＢｅすなわちベリリウムが人体に有害で
あることが問題となっていた。There is an Al-Be alloy as an alloy similar to the Al-1-i alloy, but the problem with this is that Be, that is, beryllium, is harmful to the human body.
第１表にアルミニウム、アルミニウムの表面をアルマイ
ト処理したもめ、ジュラルミン、チタンの密度ρ、ヤン
グ率Ｅ１比弾性率Ｅ／ρを示す。Table 1 shows the density ρ, Young's modulus E1, and specific elastic modulus E/ρ of aluminum, duralumin, and titanium whose surfaces are alumite-treated.
ざらにこれら上記のものの物性値と対比させるために、
Ｌｌを５．２重量％添加したＡｌ−１−ｉ合金の物性値
も合せて第１表に示す。In order to roughly compare with the physical property values of these above,
Table 1 also shows the physical properties of the Al-1-i alloy to which 5.2% by weight of Ll was added.
第１表
従来のアルミニウム系の振動板材料としてアルミニウム
の表面をアルマイト処理したもの及びアルミニウムを合
金化してジュラルミンとしたものの場合でも、その比弾
性率はアルミニウムのそれ、に比べて１０〜２０％程度
増加させるのが限度であり、まだＡ１にくらべて充分の
性能の高い電気音響変換器用振動板であるとは言えなか
った。Table 1 Even in the case of conventional aluminum-based diaphragm materials in which the surface of aluminum is anodized and aluminum is alloyed to form duralumin, the specific elastic modulus is about 10 to 20% compared to that of aluminum. The increase was the limit, and it could not yet be said that the diaphragm for electroacoustic transducers had sufficiently high performance compared to A1.
また、比弾性率が大きいＡｌ−Ｌｉ合金も熔融合金から
ダイカストインゴットを作って展伸加工する鋳造展伸法
や、熔融合金を不活性ガス中でアトマス法やスプラット
法等で急冷合金粉末とし、次いでこれを粉末冶金法で固
化し、展伸加工する粉末冶金法等による従来のＡｌ−Ｌ
ｉ合金薄板の製造方法では合金の靭性の低さのため厚さ
１００μｍ以下の薄板に加工することは極めて困難であ
った。In addition, Al-Li alloys with a high specific elastic modulus can also be produced by the casting/expansion method in which a die-cast ingot is made from the molten alloy and then expanded, or the molten alloy is rapidly cooled into alloy powder by the Atomas method or the splat method in an inert gas. Next, this is solidified using a powder metallurgy method, and the conventional Al-L is produced using a powder metallurgy method or the like.
In the method for manufacturing i-alloy thin plates, it is extremely difficult to process them into thin plates with a thickness of 100 μm or less due to the low toughness of the alloy.
１里ｍ
本発明の目的は、その加工性を向上させて高い ）比弾
性率を持つ電気音響変換器用撮動板を提供することであ
る。1 rim An object of the present invention is to provide an imaging plate for an electroacoustic transducer that has a high specific modulus of elasticity by improving its workability.
本発明の電気音響変換器用振動板は、Ａ１にＬｌを１〜
３０重量％添加して加熱熔融し融体超急冷法によって得
られたＡｌ−１−ｉ合金の薄板からなることを特徴とす
る。The electroacoustic transducer diaphragm of the present invention has Ll in A1 of 1 to 1.
It is characterized by being made of a thin plate of Al-1-i alloy, which is obtained by adding 30% by weight of Al-1-i alloy by heating and melting and ultra-quenching the melt.
また、本発明の電気音響変換器用振動板は、Ａ１にｌ−
ｉを１〜３０重量％添加して加熱熔融し融体超急冷法に
よって得られたＡｌ−Ｌｉ合金の薄板の主面に大気を遮
断する被膜を設けたことを特徴とする。Further, the electroacoustic transducer diaphragm of the present invention has l-
The present invention is characterized in that a thin plate of an Al--Li alloy obtained by adding 1 to 30% by weight of i and melting it by heating and ultra-quenching the melt is provided with a film that blocks the atmosphere on the main surface.
実施例
以下に、本発明の一実施例を添附図面に基づいて説明す
る。EXAMPLE An example of the present invention will be described below with reference to the accompanying drawings.
第１図は、Ａｌ−Ｌｉ合金薄板による電気音響変換器用
振動板の製法を示すフローチャートである。まず、融体
超急冷工程ＳＩでは、ＡＩ、Ｌｉのインゴットを融解し
てＡｌ−Ｌｉ合金の熔融体として融体超急冷を行いＡｌ
−１ｉ合金薄帯を作る。次に得られたＡｌ−Ｌｉ合金薄
帯を冷間圧延工程Ｓ２によって冷間圧延してＡｌ−１−
ｉ合金薄板を仕上げる。そして、成形工程Ｓ、に於いて
所望の電気音響変換器用振動板を得る。 第２図（ａ＞
及び（ｂ）は融体超急冷工程Ｓ＋によるＡｌ−Ｌｉ合金
薄帯の製法及び装置の概略を示した図である。加熱容器
３１内にＡＩとしｉとを１〜３０重量％のＬｌとなるよ
うに各合金母材を入れ加熱装置１３２で融解しＡｌ−Ｌ
ｉ合金の熔融体とし、加熱容器３１内をＡｒ等の不活性
ガスで加圧して熔融Ａｌ−Ｌｉ合金２０をノズル孔から
噴出させ、回転している冷却用ロール３３表面に吹付は
熔融Ａｌ−Ｌｉ合金２０を急冷せしめてＡｌ−１ｉ合金
薄帯２１を得る。第２図（ａ）には近接した一対の冷却
用ロール間の微小間隙に熔融Ａｌ−Ｌｉ合金を噴出せし
める双ロール方法、第２図（ｂ）には単一の冷却用ロー
ル表面に熔融Ａｌ−１ｉ合金を噴出せしめる単ロール方
法による融体超急冷法のＡｌ−Ｌｉ合金薄帯の製法を示
している。FIG. 1 is a flowchart showing a method of manufacturing a diaphragm for an electroacoustic transducer using a thin Al-Li alloy plate. First, in the melt super-quenching step SI, an ingot of AI and Li is melted and super-quenched as a melt of Al-Li alloy.
-1i alloy ribbon is made. Next, the obtained Al-Li alloy ribbon was cold rolled in a cold rolling step S2 to form an Al-1-
i Finishing the alloy thin plate. Then, in the molding step S, a desired electroacoustic transducer diaphragm is obtained. Figure 2 (a>
and (b) is a diagram schematically showing the method and apparatus for producing an Al-Li alloy ribbon by the melt super-quenching step S+. Each alloy base material is placed in a heating container 31 so that AI and i are 1 to 30% by weight of Ll and melted by a heating device 132 to form Al-L.
The molten Al-Li alloy 20 is sprayed from the nozzle hole by pressurizing the inside of the heating container 31 with an inert gas such as Ar, and the molten Al-Li alloy 20 is sprayed onto the surface of the rotating cooling roll 33. The Li alloy 20 is rapidly cooled to obtain an Al-1i alloy ribbon 21. Fig. 2(a) shows a twin-roll method in which molten Al-Li alloy is ejected into a minute gap between a pair of adjacent cooling rolls, and Fig. 2(b) shows a method in which molten Al-Li alloy is sprayed onto the surface of a single cooling roll. This figure shows a method for producing an Al-Li alloy ribbon using a melt ultra-quenching method using a single roll method in which -1i alloy is ejected.
また、熔融Ａｌ−Ｌｉ合金を急激に冷却凝固せしめＡｌ
−１−ｉ合金薄帯又は線材を得る融体超急冷工程はこれ
ら双ロール方法、単、ロール方法に限冷工程はこれら双
ロール方法、単ロール方法に限定されるものではなく、
例えば第６図（ａ）ないしくｆ）に概略を示すその他の
融体超急冷法でも良い。すなわち、第３図（ａ）の如ぎ
滴下する熔ＦａＡ＋−Ｃ１合金２０を一対の冷却板間に
て瞬時にプレスし急冷するピストンアンビル法や、第３
図（ｂ）の如き水平に回転する冷却ドラム４２の垂直内
側壁に熔融Ａｌ−Ｌｉ合金２０を噴出せしめ急冷する回
転ドラム法や、第３図（Ｃ）の如き垂直に回転する冷却
ドラム４３の水平内側壁に熔融Ａｌ−Ｌｉ合金を噴出せ
しめ急冷する内壁法や、第３図（ｄ）の如き冷却用液体
４４中に伸長した冷却用ノズル４５に熔融Ａｌ−Ｌｉ合
金２０を噴出せしめ急冷する溶湯噴射法や、第３図（ｅ
）の如き回転する冷却ローラ４６の外側面を熔融Ａ１−
１−ｉ合金２０溜池に接触せしめ急冷引出しする溶湯掃
引法や、第３図（ｆ）の如き熔融Ａｌ−Ｌｉ合金２０を
回転する冷却ローラ４７の外側面に滴下せしめ急冷する
滴下掃引法等の融体超急冷法によりＡｌ−１−ｉ合金薄
帯２１を得てもよい。なお、第２図の装置と同−又は対
応する部分については同じ参照符号を用いていおり、上
記以外の部分は第２図の装置と同様であり、以下の実施
例についても同様である。In addition, the molten Al-Li alloy is rapidly cooled and solidified.
The melt ultra-quenching process for obtaining -1-i alloy ribbons or wires is not limited to the twin-roll method, single-roll method, or the single-roll method; the limited cooling step is not limited to the twin-roll method or the single-roll method;
For example, other melt ultra-quenching methods as schematically shown in FIGS. 6(a) to 6(f) may be used. That is, the piston anvil method, in which the molten FaA+-C1 alloy 20 dropped dropwise is instantly pressed between a pair of cooling plates and quenched, as shown in FIG. 3(a),
A rotating drum method in which molten Al-Li alloy 20 is jetted onto the vertical inner wall of a horizontally rotating cooling drum 42 to rapidly cool it as shown in FIG. There is an inner wall method in which the molten Al-Li alloy is jetted onto the horizontal inner wall for rapid cooling, or a molten Al-Li alloy 20 is jetted into the cooling nozzle 45 extending into the cooling liquid 44 as shown in FIG. 3(d) to be rapidly cooled. Molten metal injection method, Figure 3 (e
) The outer surface of the rotating cooling roller 46 is melted A1-
The molten Al-Li alloy 20 may be brought into contact with a reservoir of 1-i alloy 20 to be rapidly cooled and drawn out, or the molten Al-Li alloy 20 may be dripped onto the outer surface of a rotating cooling roller 47 as shown in FIG. The Al-1-i alloy ribbon 21 may be obtained by a melt ultra-quenching method. Note that the same reference numerals are used for the same or corresponding parts as in the apparatus of FIG. 2, and the other parts are the same as the apparatus of FIG. 2, and the same applies to the following embodiments.
さらに、より高純度のＡｌ−Ｌｉ合金薄帯２１を得るた
めには、融体超急冷装置全体を不活性ガスまたは真空雰
囲気にすればよい。また化学的な活性の強いｌ−ｉの酸
化、水素の吸着を防ぐためにもこの装置全体をＡｒ等の
不活性ガスまたは真空中に置くことが好ましい。Furthermore, in order to obtain a higher purity Al--Li alloy ribbon 21, the entire melt ultra-quenching apparatus may be placed in an inert gas or vacuum atmosphere. Further, in order to prevent the oxidation of li, which has strong chemical activity, and the adsorption of hydrogen, it is preferable to place the entire apparatus in an inert gas such as Ar or in vacuum.
次に冷間圧延工程Ｓ２においては、融体超急冷工程によ
って得られたＡｌ−Ｌｉ合金薄帯２１を第４図に示すよ
うに近接した一対の冷却ロール３５間の微小間隙に通過
せしめ冷間圧延してＡｌ−１−ｉ合金薄板２３を得る。Next, in the cold rolling step S2, the Al-Li alloy ribbon 21 obtained by the melt super-quenching step is passed through a minute gap between a pair of adjacent cooling rolls 35 as shown in FIG. An Al-1-i alloy thin plate 23 is obtained by rolling.
第４図には一方向一段圧延を示したが、得ようとする形
状によって交差圧延方法や多段圧延機械等を用いてもよ
い。また、冷間圧延やプレス加工に代って温間圧延や温
間ブ ）レス方法を用いれば、その加工性はさらに
向上する。Although FIG. 4 shows one-way one-stage rolling, a cross-rolling method, a multi-stage rolling machine, etc. may be used depending on the shape to be obtained. Furthermore, if warm rolling or warm pressing methods are used instead of cold rolling or pressing, the workability will be further improved.
次に、成形工程Ｓ３に於いて、冷間圧延によって所望の
厚さに仕上げられたＡｌ−Ｌｉ合金薄板をプレス加工等
により第５図（ａ）ないしくｂ）に示す用途に応じた形
状の電気音響変換器用の振動板の形状に仕上げる。第５
図（ａ）はコーン型振動板５１であり、第５図（ｂ）は
ドーム型振動板５２であり、第５図（Ｃ）はハニカム構
造平面娠動板５３である。Next, in the forming step S3, the Al-Li alloy thin plate finished to the desired thickness by cold rolling is pressed into a shape according to the application shown in Fig. 5 (a) or b). Finish it into the shape of a diaphragm for an electroacoustic transducer. Fifth
FIG. 5(a) shows a cone-shaped diaphragm 51, FIG. 5(b) shows a dome-shaped diaphragm 52, and FIG. 5(C) shows a honeycomb structure planar diaphragm 53.
ところでＡｌ−１−ｉ合金薄膜はｉｔの添加量が多くな
るほど化学的な活性が強くなり、特に、大気中では空気
中の水分と反応してしまい、融体超急冷後の薄板の形状
が時間と共に変化してしまう等の問題が生じることがあ
るため、融体超急冷工程にて得られた薄帯２１を得た直
後からその表面を第６図の如くオイル等で覆いオイル被
膜５１として大気からＡｌ−Ｌｉ合金薄板２３を遮断し
て冷間圧延等の加工を進めることが好ましい。By the way, the chemical activity of the Al-1-i alloy thin film becomes stronger as the amount of IT added increases, and in particular, in the atmosphere, it reacts with moisture in the air, and the shape of the thin plate after super-quenching the melt changes over time. Immediately after obtaining the ribbon 21 obtained by the melt ultra-quenching process, the surface is coated with oil or the like as shown in FIG. It is preferable to proceed with processing such as cold rolling while blocking the Al--Li alloy thin plate 23 from the aluminum.
このようにして電気音響変換器用撮動板に加工されたＡ
Ｉ−Ｌ ｉ合金薄板２３は、上記のように化学的な活
性が強いため必要に応じて第７図のように樹脂等により
薄板２３表面に被膜５２を設けたり、あるいは大気中で
安定な金属、セラミックス等を蒸着、溶射等の方法で薄
板の表面に被膜として付着させて大気を遮断させる。A processed into an electroacoustic transducer imaging plate in this way
Since the I-Li alloy thin plate 23 has strong chemical activity as described above, if necessary, a coating 52 may be provided on the surface of the thin plate 23 using a resin or the like as shown in FIG. , ceramics, etc. are deposited as a film on the surface of the thin plate by a method such as vapor deposition or thermal spraying to block the atmosphere.
また、このような被膜は第８図の如く多層構造としても
良い。この隔液ＭＩＩＡ、Ｂ、Ｃ及びＤの各層の物質は
別々であって、樹脂、金属、セラミックス等の異なって
いるものでも構わない。Furthermore, such a coating may have a multilayer structure as shown in FIG. The materials for each layer of the separator liquids MIIA, B, C, and D may be different materials such as resins, metals, and ceramics.
特に樹脂等の内部損失の大きな被膜を設けた場合は、そ
の被膜が酸化防止の被膜のみならずダンパーとしての働
きもする。In particular, when a coating such as a resin having a large internal loss is provided, the coating acts not only as an oxidation-preventing coating but also as a damper.
本実施例の如き融体超急冷法によって得られたＡｌ−Ｌ
ｉ合金薄板は多結晶体であり、その結晶粒子は従来のよ
うに鋳造展伸法や、粉末冶金法におけるＡｌ−Ｌｉ合金
に対して種々の添加元素を加えて結晶粒子を微細化させ
たものに比べると遥かに小さな結晶粒子のものかのが得
られる。Al-L obtained by the melt ultra-quenching method as in this example
The i-alloy thin plate is a polycrystalline body, and its crystal grains are made finer by adding various additive elements to the Al-Li alloy in the conventional casting and stretching method or powder metallurgy method. The result is something with much smaller crystal grains compared to .
講だ、このように得られたＡｌ−Ｌｉ合金薄板は液体状
態から凝固する際の急冷の方向がロール面からＡｌ−Ｌ
ｉ合金薄板の芯部へと常に一定方向であるために結晶粒
子が比較的規則正しく並んでいる。つまり結晶の配向性
が良くなっている。When the Al-Li alloy thin plate obtained in this way is solidified from the liquid state, the direction of rapid cooling is from the roll surface to the Al-L
Since the direction is always constant toward the core of the i-alloy thin plate, the crystal grains are arranged relatively regularly. In other words, the crystal orientation is improved.
以上のような理由からこのようにして得られたＡｌ−１
ｉ合金薄板は冷間圧延でもかなりの延性を示し、ｌｉの
添加量が５重量％程度でも圧延時の条件すなわちロール
径、圧延荷重、ロール温度等を選択することによって、
１０μｍ以下のＡ１−１ｉ合金薄板を得ることも可能で
ある。For the reasons mentioned above, Al-1 obtained in this way
The i-alloy thin plate exhibits considerable ductility even when cold-rolled, and even if the amount of li added is about 5% by weight, it can be improved by selecting the rolling conditions such as roll diameter, rolling load, roll temperature, etc.
It is also possible to obtain A1-1i alloy thin plates of 10 μm or less.
第８図は、しｉの添加量を３型組％としたＡ１−１ｉ合
金をロール径１４０ｍｍの双ロール法によって急冷して
厚さ８５μｍ合金薄帯を得て、該薄帯をロール径６０ｍ
ｍの一対ロール間で圧延加重が１５００ｋｇ／ｃｒｎ”
にて一方向一段圧延を行った場合のＡｌ−Ｌｉ合金薄板
の冷間圧延回数と伸び率及び厚さの関係を示すグラフで
ある。曲線Ａは伸び率の変化を示し、曲線Ｂは厚さの変
化を示す。Figure 8 shows that an alloy ribbon with a thickness of 85 μm is obtained by rapidly cooling an A1-1i alloy with an addition amount of 3% by a twin roll method with a roll diameter of 140 mm.
The rolling load between a pair of rolls is 1500 kg/crn”
1 is a graph showing the relationship between the number of cold rolling times, elongation rate, and thickness of an Al-Li alloy thin plate when one-step rolling in one direction is performed. Curve A shows the change in elongation and curve B shows the change in thickness.
一方、Ｌｉの添加量が６重量％を越えるとｌ−ｉがＡ１
中に充分固溶できないためにＡｌ−Ｌｉ合金中に析出し
たｌｉが化学的な活性を示し、大気中の水分との反応等
の問題が生じるため音響振動板としての優れた物性値を
持ちながら、このままでは電気音響変換器用撮動板とし
ては適さなかった。この様な場合でも融体超急冷後の薄
板の表面にオイル等の被膜を設けてることにより圧延、
プレス等の工程を経て所望の形状に仕上げることが可能
となる。このあとその表面に樹脂の被膜を設けたり、大
気中で安定である金属、セラミックス等の被膜を設けて
合金の化学的な活性をおさえて電気音響変換器用振動板
として用いる。特に薄板表面の被膜が適度な内部損失を
持つものであれば、これがダンパーとしての働きを有し
過渡特性の良い電気音響変換器用振動板とすることがで
きる。On the other hand, when the amount of Li added exceeds 6% by weight, li is A1
Li precipitated in the Al-Li alloy exhibits chemical activity due to insufficient solid solution in the Al-Li alloy, causing problems such as reaction with moisture in the atmosphere. As it was, it was not suitable as an imaging plate for electroacoustic transducers. Even in such cases, rolling and
It is possible to finish it into a desired shape through processes such as pressing. Thereafter, the alloy is used as a diaphragm for an electroacoustic transducer by providing a resin film on its surface or a metal, ceramic, or other film that is stable in the atmosphere to suppress the chemical activity of the alloy. In particular, if the coating on the surface of the thin plate has an appropriate internal loss, it can function as a damper and provide a diaphragm for an electroacoustic transducer with good transient characteristics.
なお、上記実施例ではＡＩにｌｉを１〜３０重量％添加
したものに融体超急冷法を適用した場合について述べた
がざらに結晶粒を微細化等を目的として全体としてＬｌ
が１〜３０重量％添加され工い。状態、な。よう１例え
１、ＭｎやＺｎ＠ｐｉ ”量添加してもよい。つまり
全体としてｌｉが１〜３０重量％添加されていればＡ１
、Ｌｉ以外の他の元素が添加されていても良い。In addition, in the above example, the case was described in which the melt ultra-quenching method was applied to AI with 1 to 30% by weight of li added.
is added in an amount of 1 to 30% by weight. Condition, huh? Example 1: Mn or Zn@pi may be added in an amount of 1. In other words, if 1 to 30% by weight of li is added as a whole, A1
, and other elements other than Li may be added.
また、融体超急冷法によってＡｌ−１ｉを合金としたも
のを母材としても良いし、また加熱容器中で合金として
も良い。Further, an alloy made of Al-1i by a melt super-quenching method may be used as the base material, or it may be made into an alloy in a heating container.
また実施例では振動板に成形された後のＡｌ−１−ｉ合
金薄板の表面に被膜を設ける場合、ｌ−ｉの添加器が多
（その化学的の活性が問題となる場合について述べたが
、被膜にダンパとしての働きを持たせることも出来るの
でｌｉの添加量が少なくその化学的な活性が問題となら
ない組成範囲以内、例えば３〜６重量％で被膜を設けて
もよい。In addition, in the example, when a coating is provided on the surface of an Al-1-i alloy thin plate after being formed into a diaphragm, a large number of l-i additives are used (although we have described the case where its chemical activity is a problem). Since the coating can function as a damper, the coating may be formed with a small amount of li added within a composition range where its chemical activity is not a problem, for example, 3 to 6% by weight.
また、融体超急冷法では特にシートあるいはリボン状の
撮動板を得たいような場合はその作成条件さえ選べば圧
延プレス等の工程を経ることなく１つの工程で所望の大
きさの振動板に仕上げることもできる。In addition, with the melt ultra-quenching method, especially when you want to obtain a sheet or ribbon-shaped diaphragm, as long as you select the production conditions, you can produce a diaphragm of the desired size in one process without going through processes such as rolling press. You can also finish it.
１１東１１
上述の如く、本発明によれば、従来の鋳造展伸法や粉末
冶金法ではｌｉの添加量が多くなるとその靭性の低下か
ら電気音響変換器用撮動板として加工することが困難で
ある１されていたＡｌ−Ｌｉ合金に融体超急冷法を適用
してその結晶粒を微細化かつ配向性を向上させることに
より加工性を向上させることが出来る。従って、従来の
ＡＩや、Ａ１表面をアルマイト処理したものや、ジュラ
ルミン等のＡ１合金に比べてかなり高性能の電気音響変
換器用振動板を得ることが出来る。11 Higashi 11 As mentioned above, according to the present invention, it is difficult to process the plate as a moving plate for electroacoustic transducers due to the decrease in toughness when the amount of li added increases using the conventional casting and stretching method or powder metallurgy method. Processability can be improved by applying the melt ultra-quenching method to a certain Al-Li alloy, which has been used for a long time, to refine its crystal grains and improve their orientation. Therefore, it is possible to obtain a diaphragm for an electroacoustic transducer that has significantly higher performance than conventional AI, those whose A1 surfaces are alumite-treated, and A1 alloys such as duralumin.
ざらに、このような薄板の表面に大気中で安定な物質を
被膜とすればＬｉ添加聞がＡ１への固溶度を越えた場合
も安定化できるし、また適度な内部損失を持って樹脂等
を被膜とした場合は、これをダンパとして働かせ過渡特
性の優れた電気音響変換器用撮動板を得ることができる
。In general, if the surface of such a thin plate is coated with a substance that is stable in the atmosphere, it can be stabilized even when the amount of Li added exceeds the solid solubility in A1, and it can also be made into a resin with moderate internal loss. When such a film is used as a film, it can be used as a damper to obtain an electroacoustic transducer imaging plate with excellent transient characteristics.
第１図は本発明の電気音響変換器用振動板を得るための
製造方法を示すフローチャートであり、第２図は融体超
急冷法によるＡｌ−１ｉ合金薄板の製造方法を示す概略
断面図であり、第３図（ａ）ないしくモ）は種々の融体
超急冷法によるＡｌ−１ｉ合金簿板の製造方法を示す説
明図であり、第４図は冷間圧延法によるＡｌ−Ｌｉ合金
薄板の製造方法の概略断面図、第５図は種々の電気音響
変換器用撮動板の斜視図、第６図はＡｌ−１ｉ合金薄板
表面にオイル被膜を施した場合の冷間圧延法の概略断面
図であり、第７図及び第８図は本発明による電気音響変
換器用振動板の拡大断面図であり、第９図は圧延回数と
伸び率及び厚さとに関するグラフである。
主要部分の符号の説明
２０・・・・・・Ａｌ−Ｌｉ合金
２１・・・・・・Ａｌ−Ｌｉ合金薄帯
２３・・・・・・Ａｌ−Ｌｉ合金薄板
３０・・・・・・冷却ローラ
３１・・・・・・加熱容器
３２・・・・・・加熱装置
３５・・・・・・圧延ローラFIG. 1 is a flowchart showing a manufacturing method for obtaining a diaphragm for an electroacoustic transducer according to the present invention, and FIG. 2 is a schematic cross-sectional view showing a manufacturing method for an Al-1i alloy thin plate by a melt ultra-quenching method. , Fig. 3(a) to Fig. 3(a) to 3(a) are explanatory diagrams showing methods for producing Al-1i alloy sheets by various melt ultra-quenching methods, and Fig. 4 is an explanatory view showing methods for producing Al-Li alloy thin sheets by cold rolling method. 5 is a perspective view of various electroacoustic transducer imaging plates, and FIG. 6 is a schematic sectional view of a cold rolling method when an oil film is applied to the surface of an Al-1i alloy thin plate. 7 and 8 are enlarged sectional views of a diaphragm for an electroacoustic transducer according to the present invention, and FIG. 9 is a graph relating to the number of rolling times, elongation rate, and thickness. Explanation of symbols of main parts 20... Al-Li alloy 21... Al-Li alloy thin strip 23... Al-Li alloy thin plate 30... Cooling Roller 31... Heating container 32... Heating device 35... Rolling roller
Claims (2)
て加熱熔融し融体超急冷法によつて得られたアルミニウ
ム−リチウム合金の薄板からなることを特徴とする電気
音響変換器用振動板。(1) A diaphragm for an electroacoustic transducer, characterized in that it is made of a thin plate of an aluminum-lithium alloy obtained by adding 1 to 30% by weight of lithium to aluminum, heating and melting the mixture, and using a melt ultra-quenching method.
て加熱熔融し融体超急冷法によつて得られたアルミニウ
ム−リチウム合金の薄板の主面に大気を遮断する被膜を
設けたことを特徴とする電気音響変換器用振動板。(2) A thin film of aluminum-lithium alloy obtained by adding 1 to 30% by weight of lithium to aluminum, heating and melting it, and then super-quenching the melt, is coated with a film that blocks the atmosphere on the main surface. A diaphragm for electroacoustic transducers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26412684A JPS61141300A (en) | 1984-12-13 | 1984-12-13 | Diaphram for electro acoustic transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26412684A JPS61141300A (en) | 1984-12-13 | 1984-12-13 | Diaphram for electro acoustic transducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61141300A true JPS61141300A (en) | 1986-06-28 |
Family
ID=17398832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26412684A Pending JPS61141300A (en) | 1984-12-13 | 1984-12-13 | Diaphram for electro acoustic transducer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61141300A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55110752A (en) * | 1979-02-20 | 1980-08-26 | Matsushita Electric Ind Co Ltd | Acoustic device material |
| JPS5920442A (en) * | 1982-07-06 | 1984-02-02 | ル・サントル・ナシオナル・ドウ・ラ・ルシエルシユ・シアンテイフイツク゛セ−・エヌ・エ−ル・エス゛ | Amorphous or microcrystal aluminum base alloy |
-
1984
- 1984-12-13 JP JP26412684A patent/JPS61141300A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55110752A (en) * | 1979-02-20 | 1980-08-26 | Matsushita Electric Ind Co Ltd | Acoustic device material |
| JPS5920442A (en) * | 1982-07-06 | 1984-02-02 | ル・サントル・ナシオナル・ドウ・ラ・ルシエルシユ・シアンテイフイツク゛セ−・エヌ・エ−ル・エス゛ | Amorphous or microcrystal aluminum base alloy |
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