JPS6397308A - Production of aluminum pipe for structural and ornamental purposes - Google Patents
Production of aluminum pipe for structural and ornamental purposesInfo
- Publication number
- JPS6397308A JPS6397308A JP24337986A JP24337986A JPS6397308A JP S6397308 A JPS6397308 A JP S6397308A JP 24337986 A JP24337986 A JP 24337986A JP 24337986 A JP24337986 A JP 24337986A JP S6397308 A JPS6397308 A JP S6397308A
- Authority
- JP
- Japan
- Prior art keywords
- gloss
- reduction
- reduction rate
- surface roughness
- viscosity
- 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
- 229910052782 aluminium Inorganic materials 0.000 title claims description 13
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims description 9
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 230000003746 surface roughness Effects 0.000 claims abstract description 25
- 238000000034 method Methods 0.000 claims abstract description 16
- 229910000838 Al alloy Inorganic materials 0.000 claims description 6
- 239000003921 oil Substances 0.000 description 10
- 239000000463 material Substances 0.000 description 7
- 238000012733 comparative method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000005498 polishing Methods 0.000 description 4
- 239000007779 soft material Substances 0.000 description 4
- 241000234282 Allium Species 0.000 description 3
- 235000002732 Allium cepa var. cepa Nutrition 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000009749 continuous casting Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 1
- 238000001192 hot extrusion Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000010734 process oil Substances 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
Landscapes
- Metal Extraction Processes (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は構造・装飾用光輝アルミニウム管の製造法に関
し、特にバフ研磨を行なうことなく、引抜加工のみによ
り管の表１■粗さを最大１μｍ以下とすると共に、バフ
研磨と同等の表面光沢を付与するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for manufacturing bright aluminum tubes for structural and decorative purposes, and the present invention relates to a method for manufacturing bright aluminum tubes for structural and decorative purposes, and it is possible to maximize the surface roughness of the tube by drawing only without performing buffing. The thickness is set to 1 μm or less, and a surface gloss equivalent to that of buffing is imparted.
（従来の技術）
／ｔ又はＡｌ合金管は種々の用途に用いられ、用途によ
っては表面光沢の優れたものが望まれている。例えば装
飾用を始め、家具、三脚、ハシゴ、脚立、ＴＶアンテナ
等の構造材、スキーストックやスキーポール等のスポー
ツ用品、草刈器のハンドルのような農機具用パイプ、自
転車用ハンドルやフレーム等の構造材には優れた表面光
沢を有するＡｆ又はへ１合金管が用いられている。(Prior Art) /T or Al alloy tubes are used for various purposes, and depending on the purpose, excellent surface gloss is desired. Examples include decorative materials, structural materials such as furniture, tripods, ladders, stepladders, TV antennas, sports equipment such as ski poles and ski poles, pipes for agricultural equipment such as mower handles, bicycle handles and frames, etc. Af or Hel alloy tubes with excellent surface gloss are used for the material.
一般にＡｌ又はＡｌ合金管は熱間押出加工した押出素管
を円錐ダイスと長芯プラグを用いた引抜加工により造ら
れている。引抜加工には生産性と焼付きを考慮し、高粘
度（２０００〜１ｏｏｏ。Generally, Al or Al alloy tubes are manufactured by drawing a hot extruded raw tube using a conical die and a long core plug. The drawing process takes productivity and seizure into consideration, and has a high viscosity (2000 to 1ooo).
Ｃｓｔ／４０℃〉の引抜加工油を使用している。その結
果引火管は表面相度や表面光沢が劣るため、上記光沢が
望まれる用途に対しては、引扱管の表面をバフ研磨した
り、ハフ・化学Ｕ１磨したり又は研磨後アルマイト処理
を施している。Cst/40℃〉 drawing processing oil is used. As a result, the surface roughness and surface gloss of the flash tube are poor, so for applications where the above gloss is desired, the surface of the flash tube should be buffed, huffed/chemically U1 polished, or alumite treated after polishing. are giving.
（発明が解決しようとする問題点〕
引抜加工したＡｌ又はＡｌ合金管は、引抜のままでは表
面粗さや表面光沢が劣るため、上記のような表面光沢が
要求される用途には使用できない。そこでメーカー又は
ユーザーにおいて引抜管の表面をバフ研磨したり、バフ
・化学研磨したり又は研磨後にアルマイ１−ｆｆｉ理を
施している。しかしながらこのような作業は手数がかか
るばかりか、生産性も低く、製造コストを高める欠点か
あった。(Problems to be Solved by the Invention) Drawn Al or Al alloy pipes have poor surface roughness and surface gloss when they are drawn, so they cannot be used in applications that require surface gloss as described above. Manufacturers or users perform buffing, buffing/chemical polishing, or aluminium 1-ffi treatment on the surface of drawn pipes after polishing.However, such operations are not only time-consuming but also have low productivity. The drawback was that it increased manufacturing costs.
本発明はこれに鑑み種々検討の結果、引火加工上りで表
面粗さと表面光沢に優れ、改めてバフ研磨やバフ・化学
研磨を施す必要がない構造・装飾用光輝アルミニウム管
の製造法を開発したもので、Ａｌ又はＡｌ合金の熱間押
出素管の引抜加工において、アールダイスと玉葱プラグ
を用い、粘度３０〜４００ Ｃｓｔ／４０℃の引抜加工
油を使用し、縮径率（Ｒ）と減肉率（ｔ）の比（Ｒ／ｔ
）を０．５以下とし、１パスロのリダクションを１０〜
２５％、２パス目以降のリダクションを１０〜２０％と
して、２〜３パスの引抜加工を行ない、管の表面粗さを
最大１μｍ以下にすると共に、バフ研磨と同等の表面光
沢を付与することを特徴とするものである。In view of this, as a result of various studies, the present invention has developed a method for manufacturing bright aluminum tubes for structural and decorative purposes, which have excellent surface roughness and surface gloss after flammability processing, and do not require buffing, buffing, or chemical polishing. In the drawing process of hot extruded raw pipes of Al or Al alloy, R dies and onion plugs were used, and drawing oil with a viscosity of 30 to 400 Cst/40°C was used to determine the diameter reduction ratio (R) and thickness reduction. Ratio (R/t) of rate (t)
) is 0.5 or less, and the reduction of 1 pass throw is 10~
25% and a reduction of 10 to 20% after the second pass, perform 2 to 3 passes of drawing to reduce the surface roughness of the tube to a maximum of 1 μm or less and give the same surface gloss as buffing. It is characterized by:
即ち本発明は、常法に従ってＡｌ又はＡｌ合金を溶解・
鋳造し、これを均質化処理した俊、熱間押出を行なって
素管を形成する。この素管をアールダイスと玉葱プラグ
を用い、粘度３０〜４００ Ｃｓｔ／４０℃の引抜加工
油を使用して引抜加工する。引抜加工に必たっては、縮
径率（Ｒ）と減肉率（ｔ）の比（Ｒ／ｔ）を０．５以下
とし、１パス目のリダクションを１０〜２５％、特に軟
質材、例えばＪＩＳ １０５０．１１００．３００３．
６０６３等では１０〜２５％、中硬質材、例えばＪＩＳ
３００４．５０５２．６０６１．７ＮＯ１゜７００３
、 ＡＡ７０４６等では１０〜２０％とし、２パス目以
降のリダクションを１０〜２０％、特に軟質材で１０〜
２０％、中硬質材で１０〜１５％とし、２〜３パスの引
抜加工により、管の表面粗さを最大で１μｍ以下とする
と共に、バフ研磨と同等の表面光沢を付与するものでお
る。That is, in the present invention, Al or an Al alloy is melted and
It is cast, homogenized, and then hot extruded to form a raw tube. This raw tube is drawn using a R die and an onion plug using drawing oil having a viscosity of 30 to 400 Cst/40°C. In the drawing process, the ratio (R/t) of the diameter reduction rate (R) and the thickness reduction rate (t) should be 0.5 or less, and the first pass reduction should be 10 to 25%, especially when using soft materials, e.g. JIS 1050.1100.3003.
6063 etc., 10-25%, medium hard materials, e.g. JIS
3004.5052.6061.7NO1゜7003
, 10 to 20% for AA7046 etc., and 10 to 20% reduction after the second pass, especially 10 to 20% for soft materials.
20%, and 10 to 15% for medium-hard materials, and by drawing 2 to 3 passes, the surface roughness of the tube is reduced to 1 μm or less at maximum, and a surface gloss equivalent to that of buffing is imparted.
本発明はバフ研磨を施すことなく引抜加工のみによりＡ
ｌ又はＡ、ｉ！合金管に優れた表面粗さと表面光沢を付
与するもので、素管の引抜加工にアールダイスと玉葱プ
ラグを用いたのは、管外面をプラグからの反力によって
安定的にダイスに押し付け、管表面の粗さと光沢を向上
せしめるためである。この引抜加工において、粘度３０
〜４００ Ｃｓｔ／４０℃の引抜加工油を用いたのは、
この範囲の粘度において優れた表面粗さと表面光沢が得
られ、引抜加工油として粘度３０Ｃｓｔ／４０℃未満の
低粘度油では、管表面に焼付きを生じ、粘度４００ Ｃ
ｓｔ／４０℃を越える高粘度油では目的の表面粗さと光
沢が得られない。また引抜加工における縮径率（Ｒ）と
減肉率（ｔ）の比（Ｒ／ｔ）を０．５以下としたのは、
パス中の空引き量を少なくし、素管の内外面とも工具拘
束の状態での引抜加工を可能にし、良好な表面粗ざと表
面光沢を得るためでおり、Ｒ／ｔが０．５を越えると表
面荒れを起しやすくなる。The present invention achieves A by only drawing process without buffing.
l or A, i! This gives the alloy tube excellent surface roughness and surface gloss.The R die and onion plug are used to draw the raw tube.The tube's outer surface is stably pressed against the die by the reaction force from the plug, and the tube is drawn. This is to improve surface roughness and gloss. In this drawing process, the viscosity is 30
~400 Cst/40℃ pultrusion oil was used.
Excellent surface roughness and surface gloss can be obtained in this range of viscosity, and low viscosity oil with a viscosity of less than 30Cst/40℃ as a drawing process oil will cause seizure on the tube surface and will result in a viscosity of 400C.
If the oil has a high viscosity exceeding st/40°C, the desired surface roughness and gloss cannot be obtained. In addition, the reason why the ratio (R/t) of the diameter reduction rate (R) and the thickness reduction rate (t) in the drawing process is set to 0.5 or less is that
This is done to reduce the amount of empty drawing during the pass, to enable drawing with the tool restrained on both the inner and outer surfaces of the raw tube, and to obtain good surface roughness and surface gloss, with R/t exceeding 0.5. and surface roughness is likely to occur.
次に引抜加工において１パス目のリダクションを１０〜
２５％、特に軟質材で１０〜２５％、中硬質材で１０〜
２０％としたのは、焼付き防止と肉厚方向に均等なリダ
クションを得るためであり、それぞれ下限未満では管表
面と肉厚中央での変形が不均一となって、管表面に欠陥
を生じやすく、上限を越えると表面粗さと表面光沢が劣
化するためでおる。また２パス目以降のリダクションを
１０〜２０％、特に軟質材で１０〜２０％、中硬質材で
１０〜１５％としたのは、素管の加工硬化による硬度増
加を考慮したもので、それぞれ下限未満では変形が不均
一となって表面欠陥が生じやすく、上限を越えると表面
粗さと表面光沢を損なうためである。更に引抜ぎ回数を
２〜３パスとしたのは、引抜回数が１回では表面粗さと
表面光沢の向上が不十分でおり、パス回数を重ねること
により表面粗さと表面光沢の向上効果が累積する。しか
して４パス以上の引（友加工を行なつても、それ以上の
効果が得られず、逆に表面粗さと表面光沢を低下する傾
向を示すためでおる。Next, in the drawing process, the first pass reduction is 10~
25%, especially 10-25% for soft materials, 10-25% for medium-hard materials
The reason why it is set at 20% is to prevent seizure and to obtain a uniform reduction in the wall thickness direction.If it is less than the lower limit, the deformation on the pipe surface and the center of the wall thickness will become uneven, causing defects on the pipe surface. If the upper limit is exceeded, surface roughness and surface gloss deteriorate. In addition, the reduction after the second pass was set at 10 to 20%, especially 10 to 20% for soft materials, and 10 to 15% for medium hard materials, taking into consideration the increase in hardness due to work hardening of the raw pipe. If it is less than the lower limit, deformation becomes uneven and surface defects are likely to occur, and if it exceeds the upper limit, surface roughness and surface gloss will be impaired. Furthermore, the reason why the number of drawing passes is set to 2 to 3 is that the improvement of surface roughness and surface gloss is insufficient if the number of drawing passes is repeated, and the effect of improving surface roughness and surface gloss accumulates by repeating the number of passes. . However, even if four or more passes are applied, no further effect can be obtained, and on the contrary, the surface roughness and surface gloss tend to decrease.
実施例１
ＪＩＳ ３００３を半連続鋳造法により直径１４５簡、
長さ５０００簡の鋳塊とし、これを長さ４００ Ｍに切
断して５６０〜６００ ℃で５時間均質化処理した後、
３５０〜５１０℃に再加熱して熱間押出により素管を作
成した。尚素管サイズは引扱加工上りの寸法が一定にな
るように変化させた。これを第１表に示す引抜条件で引
抜加工して直径３０ｍ、肉厚１．０＃の管に仕上げた。Example 1 JIS 3003 was made into a diameter of 145 pieces by semi-continuous casting method.
An ingot with a length of 5000 mm was cut into 400 M lengths and homogenized at 560 to 600 °C for 5 hours.
The tube was reheated to 350 to 510°C and then hot extruded to produce a blank tube. The raw tube size was varied so that the dimensions after handling and processing remained constant. This was drawn under the drawing conditions shown in Table 1 to produce a tube with a diameter of 30 m and a wall thickness of 1.0#.
これについて表面粗さ、光沢及び焼付の有無を調べた。The surface roughness, gloss, and presence or absence of burning were examined.
その結果を第１表に併記した。The results are also listed in Table 1.
尚表面粗さは５点測定した平均値を示し、光沢は目視に
より調べ、光沢のあるものを○印、ないものをＸ印で表
わした。The surface roughness is the average value measured at 5 points, and the gloss is visually checked, and those with gloss are marked with ○, and those with no gloss are marked with X.
第１表から明らかなように、本発明法Ｎα１〜１０によ
り製造したアルミニウム管は表面粗さと光沢に優れてい
ることが判る。これに対し加工油の粘度が３０Ｃｓｔ／
４０°Ｃ未満の比較法Ｎα１１．１３では何れも管表面
に焼付きを発生し、加工油の粘度が４００ Ｃｓｔ／４
０℃を越える比較法Ｎα１２．１４では何れも光沢がな
く、縮径率（Ｒ）と減肉率（ｔ）の比（Ｒ／ｔ）が０．
５を越える比較法Ｎα１５〜１７では表面粗さと表面光
沢が劣る。As is clear from Table 1, the aluminum tubes manufactured by the method Nα1 to Nα10 of the present invention are excellent in surface roughness and gloss. On the other hand, the viscosity of processing oil is 30Cst/
In all comparative methods Nα11.13 at temperatures below 40°C, seizure occurred on the tube surface, and the viscosity of the processing oil was 400 Cst/4.
In the comparative method Nα12.14 exceeding 0°C, there was no gloss, and the ratio (R/t) of the diameter reduction rate (R) and the thickness reduction rate (t) was 0.
Comparative method Nα15 to 17 exceeding 5 have poor surface roughness and surface gloss.
実施例２
ＪＩＳ ６０６１を実施例１と同様にして半連続鋳造法
により直径１４５ Ｍ、長さ５０００ｍの鋳塊とし、こ
れを長さ４００＃に切断して５３０〜５８０ ℃で５時
間均質化処理した後、４００〜５００℃に再加熱して熱
間押出により素管を作成した。これを第２表に示す引抜
条件で用法加工して直径３０ｍ、肉厚１．０ｍの管に仕
上げた。これについて実施例１と同様に表面粗さ、光沢
及び焼付きの有無を調べ、その結果を第２表に併記した
。Example 2 JIS 6061 was made into an ingot with a diameter of 145 M and a length of 5000 m using the semi-continuous casting method in the same manner as in Example 1. This was cut into 400# lengths and homogenized at 530 to 580 °C for 5 hours. After that, it was reheated to 400 to 500°C and a mother pipe was created by hot extrusion. This was processed under the drawing conditions shown in Table 2 to produce a tube with a diameter of 30 m and a wall thickness of 1.0 m. The surface roughness, gloss, and presence or absence of burn-in were examined in the same manner as in Example 1, and the results are also listed in Table 2.
第２表から明らかなように、本発明法Ｎ０１８〜２５に
より製造したアルミニウム管は表面粗さと光沢に浸れて
いることが判る。これに対し加工油の粘度か３０Ｃｓｔ
／４０°Ｃ未満の比較法Ｎｏ、２６．２８では何れも管
表面に焼付きを発生し、加工油の粘度が４００ Ｃｓｔ
／４０℃を越える比較法Ｎα２７．２９では何れも光沢
がなく、縮径率（Ｒ）と減肉率（ｔ）の比（Ｒ／ｔ）が
０．５を越える比較法Ｎα３０．３１では表面粗さと光
沢が劣る。As is clear from Table 2, the aluminum tubes manufactured by the methods Nos. 018 to 25 of the present invention have excellent surface roughness and gloss. On the other hand, the viscosity of processing oil is 30Cst
/ Comparative method No. 26.28 at temperatures below 40°C caused seizure on the tube surface, and the viscosity of the processing oil was 400 Cst.
/ Comparative method Nα27.29 where the temperature exceeds 40°C has no gloss, and comparative method Nα30.31 where the ratio (R/t) of diameter reduction rate (R) and thickness reduction rate (t) exceeds 0.5 has no surface gloss. Poor roughness and gloss.
（発明の効果）
このように本発明によれば、バフ研磨を行なうことなく
、引火加工のみにより、バフ研磨と同等の表面光沢がｊ
ｑられるもので、構造・装飾用光輝アルミニウム管に適
し、メーカー又はユーザーにおけるバフ研磨等を省くこ
とができるので、生産性が高く、製造コストを下げるこ
とができる等工業上顕著な効果を奏するものでおる。(Effects of the Invention) As described above, according to the present invention, the surface gloss equivalent to that of buffing can be achieved by only ignition processing without buffing.
It is suitable for bright aluminum tubes for structural and decorative purposes, and has significant industrial effects such as high productivity and reduced manufacturing costs as it eliminates the need for buffing on the part of the manufacturer or user. I'll go.
Claims (1)
アールダイスと玉芯プラグを用い、粘度３０〜４００Ｃ
ｓｔ／４０℃の引抜加工油を使用し、縮径率（Ｒ）と減
肉率（ｔ）の比（Ｒ／ｔ）を０．５以下とし、１パス目
のリダクションを１０〜２５％、２パス目以降のリダク
ションを１０〜２０％として、２〜３パスの引抜加工を
行ない、管の表面粗さを最大１μ以下にすると共にバフ
研磨と同等の表面光沢を付与する構造・装飾用光輝アル
ミニウム管の製造法。In the drawing process of hot extruded pipes of Al or Al alloy,
Viscosity 30-400C using R die and ball core plug
Using drawing oil at 40°C, the ratio of diameter reduction rate (R) to thickness reduction rate (t) (R/t) is 0.5 or less, and the first pass reduction is 10 to 25%. Structural/decorative brightness that reduces the surface roughness of the tube to 1 μ or less at maximum and gives the same surface gloss as buffing by performing 2-3 passes of drawing with a reduction of 10-20% from the 2nd pass onwards. Method of manufacturing aluminum tubes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24337986A JPS6397308A (en) | 1986-10-14 | 1986-10-14 | Production of aluminum pipe for structural and ornamental purposes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24337986A JPS6397308A (en) | 1986-10-14 | 1986-10-14 | Production of aluminum pipe for structural and ornamental purposes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6397308A true JPS6397308A (en) | 1988-04-28 |
Family
ID=17102977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24337986A Pending JPS6397308A (en) | 1986-10-14 | 1986-10-14 | Production of aluminum pipe for structural and ornamental purposes |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6397308A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995028239A1 (en) * | 1994-04-14 | 1995-10-26 | Sumitomo Metal Industries, Ltd. | Bright-annealed highly smooth inner surface stainless steel pipe and method of manufacturing the same |
| JP2006217921A (en) * | 1997-11-28 | 2006-08-24 | Daiwa Seiko Inc | Tubular body and production thereof |
-
1986
- 1986-10-14 JP JP24337986A patent/JPS6397308A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995028239A1 (en) * | 1994-04-14 | 1995-10-26 | Sumitomo Metal Industries, Ltd. | Bright-annealed highly smooth inner surface stainless steel pipe and method of manufacturing the same |
| US6029714A (en) * | 1994-04-14 | 2000-02-29 | Sumitomo Metal Industries, Ltd. | Stainless steel pipe of bright annealing finish type, having highly-smoothed inner surface and method for producing the same |
| JP2006217921A (en) * | 1997-11-28 | 2006-08-24 | Daiwa Seiko Inc | Tubular body and production thereof |
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