JPH02232330A - Screw rotor made of aluminum alloy - Google Patents
Screw rotor made of aluminum alloyInfo
- Publication number
- JPH02232330A JPH02232330A JP5137589A JP5137589A JPH02232330A JP H02232330 A JPH02232330 A JP H02232330A JP 5137589 A JP5137589 A JP 5137589A JP 5137589 A JP5137589 A JP 5137589A JP H02232330 A JPH02232330 A JP H02232330A
- Authority
- JP
- Japan
- Prior art keywords
- screw rotor
- aluminum alloy
- strength
- extrusion
- rotor made
- 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.)
- Pending
Links
- 229910000838 Al alloy Inorganic materials 0.000 title abstract description 10
- 238000001125 extrusion Methods 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Forging (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
この発明は、産業用コンプレッサーや自動車用スーパー
チャージャー等に用いられるアルミニウム合金製スクリ
ューローターに関する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to an aluminum alloy screw rotor used in industrial compressors, automobile superchargers, and the like.
従来の技術
上記のようなスクリューローターは、一般的には第１図
に示すように、外面長さ方向に螺旋状に伸びる凹凸部（
２）を有するものに構成される。ところで、かかるスク
リューローター（１）をねじり押出によって製作する方
法が従来より知られている（例えば特開昭６２−６３１
９０号）。このようなねじり押出によって高精度のスク
リューローターを得るためには、押出条件を一定に維持
する必要があるが、成形性の悪い材料を用いると例えば
押出圧力の変化により押出スピードが変化して精度の高
いものが得られない。このため従来では、スクリューロ
ーターの材料として成形性が良く高精度を実現できるＡ
１０５０、３００３、６０６３等のアルミニウム合金が
用いられていた。BACKGROUND OF THE INVENTION Generally, as shown in Fig. 1, the screw rotor as described above has a concavo-convex portion extending spirally in the length direction of the outer surface.
2). By the way, a method of manufacturing such a screw rotor (1) by twist extrusion has been known (for example, Japanese Patent Laid-Open No. 62-631).
No. 90). In order to obtain a high-precision screw rotor by such torsional extrusion, it is necessary to maintain extrusion conditions constant, but if a material with poor formability is used, for example, the extrusion speed will change due to a change in extrusion pressure, resulting in poor precision. I can't get a high value. For this reason, conventional materials used for screw rotors include A, which has good formability and can achieve high precision.
Aluminum alloys such as 1050, 3003, and 6063 were used.
発明が解決しようとする課題
しかし、これらのアルミニウム合金では確かに成形性に
は優れるものの強度的に問題があり、スクリューロータ
ーの回転に対する十分な機械的強度を付与できなかった
。もとより、強度を確保するには強度に優れたＡ７００
３、Ａ２０１７合金等を用いることも一応考えられるが
、反面これらは成形性に劣ることから、この場合は逆に
精度の良いスクリューローターを得ることが困難となる
ものであった。Problems to be Solved by the Invention However, although these aluminum alloys certainly have excellent formability, they have problems in terms of strength, and cannot provide sufficient mechanical strength against the rotation of the screw rotor. Of course, to ensure strength, A700, which has excellent strength, is used.
3. It is conceivable to use A2017 alloy, etc., but on the other hand, these have poor formability, and in this case it is difficult to obtain a screw rotor with good precision.
この発明はかかる事情に鑑みてなされたちのであって、
それ自体成形性に優れて高精度を実現できしかも十分な
強度を保有するスクリューローターの提供を目的とする
ものである。This invention was made in view of these circumstances,
The object of the present invention is to provide a screw rotor that has excellent moldability, can achieve high precision, and has sufficient strength.
課題を解決するための手段
上記目的を達成するために、発明者は鋭意研究の結果、
成形性、強度いずれをも満足しうるスクリューローター
の合金組成を見出し、この発明を完成しえたものである
。Means for Solving the Problems In order to achieve the above object, the inventor has conducted extensive research and found that
This invention was completed by discovering an alloy composition for a screw rotor that satisfies both formability and strength.
すなわちこの発明は、Ｍｇ：０．４〜０． ８ｗｔ％、
Ｓ ｉ ： ０． ４ 〜０． ９ｗｔ％、Ｃｕ：０
．ｌｖｔ％を超え０．５νｔ％以下を含有するアルミニ
ウム合金製スクリューローターを要旨とするものである
。That is, in this invention, Mg: 0.4 to 0. 8wt%,
Si: 0. 4 to 0. 9wt%, Cu:0
．． The gist is an aluminum alloy screw rotor containing more than lvt% and 0.5vt% or less.
スクリューローターの組成において、Ｍｇはスクリュー
ローターの強度向上に寄与するものである。しかし、そ
の含有量が０． ４ｖｔ％未満では上記効果に乏しく、
逆に０． ８ｗｔ％を超えると成形性の悪化を招き、寸
法精度を悪化させる。Ｍｇの特に好ましい含有範囲は０
．５〜０。In the composition of the screw rotor, Mg contributes to improving the strength of the screw rotor. However, the content is 0. If it is less than 4vt%, the above effects will be poor,
On the other hand, 0. If it exceeds 8 wt%, moldability deteriorates and dimensional accuracy deteriorates. A particularly preferable content range of Mg is 0
．． 5-0.
７ｗｔ％である。It is 7wt%.
ＳｔもＭｇと同じくスクリューローターの強度向上に寄
与するものである。しかし、含有量が０．４ｖｔ％未満
ではその効果に乏しく、逆に０． ９ｖｔ％を超える
とやはり成形性の悪化を招く。Ｓｉの特に好ましい含有
範囲は０．５〜０，７ｖｔ％である。Like Mg, St also contributes to improving the strength of the screw rotor. However, if the content is less than 0.4vt%, the effect is poor; If it exceeds 9vt%, moldability will deteriorate. A particularly preferred range of Si content is 0.5 to 0.7 vt%.
Ｃｕも同じくスクリューローターの強度向上に寄与する
ものである。しかし、含有量がＯ，ｌｖｔ％以下ではそ
の効果に乏しく、逆に０．５ｖｔ％を超えるとやはり成
形性の悪化を招く。ＣＵの特に好ましい含有範囲は０．
１５〜０．３ｖｔ％である。Cu also contributes to improving the strength of the screw rotor. However, if the content is less than O.lvt%, the effect will be poor, and if it exceeds 0.5vt%, moldability will deteriorate. A particularly preferable content range of CU is 0.
It is 15-0.3vt%.
本発明に係るスクリューローターは、上記組成を有する
アルミニウム合金ビレットをねじり押出しすることによ
って得られるものである。The screw rotor according to the present invention is obtained by twisting and extruding an aluminum alloy billet having the above composition.
押出条件は特に限定するものではなく、常法に従って行
えば良い。また、押出後の処理も特に限定はしないが、
押出後水冷等により急冷しその後１６０〜２００℃×３
〜１２時間の時効処理を行うのが、より一層強度に優れ
たスクリュ一ローターを得ることができる点で望ましい
。Extrusion conditions are not particularly limited, and any conventional method may be used. In addition, there are no particular limitations on the processing after extrusion, but
After extrusion, quench by water cooling etc. and then 160-200℃ x 3
It is desirable to carry out the aging treatment for up to 12 hours, since it is possible to obtain a screw rotor with even greater strength.
なかでも特に１８０〜１９０℃×５〜８時間に設定する
のが最も良い。Among these, it is best to set the temperature to 180 to 190°C for 5 to 8 hours.
発明の効果
この発明に係るスクリューローターは上述の次第で、Ｍ
ｇ ８ ０． ４〜０． ８ｗｔ％、Ｓｉｌ０．４ 〜
０．９ｖｔ％、Ｃｕ：０．１ｗｔ％を超え０．５ｖｔ％
以下を含有するアルミニウム合金からなるものであるか
ら、後述する実施例の参酌によっても明らかなとおり、
成形性に優れ高精度を実現しうるのに加えて、十分な強
度を保有し容易に破損しない長寿命のスクリューロータ
ーとなしうる。Effects of the Invention As described above, the screw rotor according to the present invention has M
g 8 0. 4-0. 8wt%, Sil0.4 ~
0.9vt%, Cu: over 0.1wt% 0.5vt%
Since it is made of an aluminum alloy containing the following, as will be clear from consideration of the examples described below,
In addition to being excellent in formability and achieving high precision, it also has sufficient strength and can be made into a long-life screw rotor that is not easily damaged.
実施例 次にこの発明の実施例を示す。Example Next, examples of this invention will be shown.
第１表に示す各種組成のアルミニウム合金を、溶解半連
続鋳造によって、直径２１０ｍ＋のビレットに製作した
。次いでこのビレットを押出温度５００℃、押出速度：
３７ｒＬ／分の条件で第１図に示すような中空部（３）
を有する断面四つ葉状のスクリューローター（１）（最
大外径８６ｔｒａ、内径３６！ＩＭ）に押出した。次に
各材料につき、Ｔ５処理として１８５℃×７時間の時効
処理を行い供試片とした。Aluminum alloys having various compositions shown in Table 1 were produced into billets with a diameter of 210 m+ by melting and semi-continuous casting. This billet was then extruded at a temperature of 500°C and an extrusion speed:
Hollow part (3) as shown in Figure 1 under the condition of 37rL/min.
It was extruded into a screw rotor (1) having a four-lobed cross section (maximum outer diameter 86 tra, inner diameter 36! IM). Next, each material was subjected to an aging treatment at 185° C. for 7 hours as a T5 treatment to prepare test pieces.
以上により得た各種のスクリューローター用供試片につ
き、成形性を評価すべく欠肉の有無、寸法精度を調べる
とともに、引張強さを測定した。それらの結果を併せて
第１表に示す。The various test pieces for screw rotors obtained above were examined for the presence of underfilling and dimensional accuracy in order to evaluate their formability, and their tensile strength was also measured. The results are shown in Table 1.
第１表 一ローターの斜視図である。 Table 1 FIG. 1 is a perspective view of one rotor.
（１）・・・スクリューローター
（注）○・・・欠肉もなくほぼ設計通りの寸法が得られ
た。(1)...Screw rotor (Note) ○...Dimensions almost as designed were obtained with no missing parts.
Ｘ・・・部分的に欠肉が認めらね、設計通りの寸法が得
られなかった。X: Partial lack of thickness was not observed, and the dimensions as designed could not be obtained.
上記第１表の結果からわかるように、本発明組成範囲の
供試片は比較品に較べて欠肉や寸法の狂いもなく従って
成形性に優れたものであることを確認しえた。As can be seen from the results in Table 1 above, it was confirmed that the test pieces having the composition range of the present invention had no underfilling or dimensional deviations compared to the comparative products, and therefore had excellent moldability.
Claims (1)
ｔ％、Ｃｕ：０．１ｗｔ％を超え０．５ｗｔ％以下を含
有するアルミニウム合金製スクリューローター。Mg: 0.4-0.8wt%, Si: 0.4-0.9w
t%, Cu: more than 0.1 wt% and 0.5 wt% or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5137589A JPH02232330A (en) | 1989-03-02 | 1989-03-02 | Screw rotor made of aluminum alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5137589A JPH02232330A (en) | 1989-03-02 | 1989-03-02 | Screw rotor made of aluminum alloy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02232330A true JPH02232330A (en) | 1990-09-14 |
Family
ID=12885201
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5137589A Pending JPH02232330A (en) | 1989-03-02 | 1989-03-02 | Screw rotor made of aluminum alloy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02232330A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52143911A (en) * | 1976-05-25 | 1977-11-30 | Sumitomo Chem Co Ltd | Preparation of extrusio n shape of thin thickness |
| JPS6296639A (en) * | 1985-09-30 | 1987-05-06 | アルカン・インタ−ナシヨナル・リミテツド | Extrusion ingot of al-mg-si alloy and its production |
-
1989
- 1989-03-02 JP JP5137589A patent/JPH02232330A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52143911A (en) * | 1976-05-25 | 1977-11-30 | Sumitomo Chem Co Ltd | Preparation of extrusio n shape of thin thickness |
| JPS6296639A (en) * | 1985-09-30 | 1987-05-06 | アルカン・インタ−ナシヨナル・リミテツド | Extrusion ingot of al-mg-si alloy and its production |
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