JPH01162536A - Manufacture of bomb - Google Patents
Manufacture of bombInfo
- Publication number
- JPH01162536A JPH01162536A JP31996287A JP31996287A JPH01162536A JP H01162536 A JPH01162536 A JP H01162536A JP 31996287 A JP31996287 A JP 31996287A JP 31996287 A JP31996287 A JP 31996287A JP H01162536 A JPH01162536 A JP H01162536A
- Authority
- JP
- Japan
- Prior art keywords
- aluminum
- blank
- cold
- mouth
- opening end
- 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
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 25
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 18
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 15
- 239000000314 lubricant Substances 0.000 claims abstract description 13
- 238000000137 annealing Methods 0.000 claims abstract description 10
- 239000007787 solid Substances 0.000 claims abstract description 9
- 230000001050 lubricating effect Effects 0.000 claims abstract 2
- 238000001125 extrusion Methods 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 26
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 17
- 238000005461 lubrication Methods 0.000 abstract description 8
- 238000005482 strain hardening Methods 0.000 abstract description 2
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 238000012545 processing Methods 0.000 description 8
- 206010010904 Convulsion Diseases 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000000641 cold extrusion Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910001094 6061 aluminium alloy Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 235000010627 Phaseolus vulgaris Nutrition 0.000 description 1
- 244000046052 Phaseolus vulgaris Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 235000021167 banquet Nutrition 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 description 1
- 239000008116 calcium stearate Substances 0.000 description 1
- 235000013539 calcium stearate Nutrition 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010273 cold forging Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、継目なし金属製ガス容器（ボンベ）の製造方
法に関する。特にアルミニウムまたはアルミニウム合金
の継目なしボンベを冷間鍛造法により製造する方法に関
する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for manufacturing a seamless metal gas container (cylinder). In particular, the present invention relates to a method of manufacturing seamless cylinders made of aluminum or aluminum alloy by cold forging.
（従来の技術）
従来、鉄製ガス容器は、パイプを素材とし、パイプ端面
を高周波加熱して鍛接により底面を形成していた。口金
部も同様に、端面を高周波加熱した後に、圧下すること
によって形成していた（マンネスマン方式）。(Prior Art) Conventionally, a steel gas container has been made of a pipe, and the bottom surface has been formed by forge welding by high-frequency heating of the end surface of the pipe. Similarly, the mouthpiece was formed by high-frequency heating the end face and then pressing down (Mannesmann method).
しかし医療用等に用いられるアルミニウム製ガスボンベ
は、パイプからの鍛接ではつくれない。However, aluminum gas cylinders used for medical purposes cannot be made by forge welding pipes.
このため次のような方法が用いられている。For this reason, the following method is used.
まず、ブランクを４５０℃程度に加熱し、カーボン系潤
滑剤を用いて、熱間後方押出し加工（エルハルト穿孔）
により、底付管を得□る。つづいて、切削加工によって
、正規寸法の底付管とした後に、口金部をスェージング
加工またはスピンニング加工することによってアルミニ
ウムボンベを製造する。First, the blank is heated to about 450℃, and using a carbon-based lubricant, hot backward extrusion processing (Erhardt drilling) is performed.
Obtain a bottomed tube by □. Subsequently, a bottomed tube of regular dimensions is formed by cutting, and then the mouthpiece is swaged or spun to produce an aluminum cylinder.
（発明が解決しようとする問題点）
しかしこの方法では、加工精度が悪いため底付管製造時
の切削コストが嵩むうえ材料の歩留が悪かった。また口
金部を成形する際の作業能率も悪く、生産費全体を高い
ものとしていた。(Problems to be Solved by the Invention) However, with this method, machining accuracy is poor, resulting in increased cutting costs during the production of bottomed tubes and poor material yield. Furthermore, the working efficiency when molding the mouthpiece was poor, making the overall production cost high.
エルハルト穿孔によらないアルミボンベのｌＪ造法とし
て、底部と口金部を別々に切削ないし鍛造で製造し、こ
れらをＭＩＧ、ＴＩＧ等で溶接して、ボンベとする方法
がある。しかしこの製造方法では継目を生じるため溶接
部の信顛性が不十分であり、高圧ガス用としては問題が
あった。As an IJ manufacturing method for aluminum cylinders that does not require Erhardt drilling, there is a method in which the bottom and mouth parts are manufactured by cutting or forging separately, and these are welded using MIG, TIG, etc. to form a cylinder. However, this manufacturing method produces a seam, resulting in insufficient reliability of the welded part, which is a problem for use with high-pressure gas.
本発明の目的は、このような従来のアルミニウムないし
アルミニウム合金製ボンベの製造方法の問題点を解決し
、高歩留・低コストでしかも高精度のアルミニウムない
しアルミニウム合金製ボンベの製造方法を提供すること
である。The purpose of the present invention is to solve the problems of the conventional method for manufacturing aluminum or aluminum alloy cylinders, and to provide a method for manufacturing aluminum or aluminum alloy cylinders with high yield, low cost, and high precision. That's true.
（問題点を解決するための手段）
本発明者らは、上述の目的を達成するため研究を重ね、
□次の着想を得た。(Means for solving the problem) In order to achieve the above-mentioned purpose, the present inventors have conducted repeated research,
□I got the next idea.
底付管の製造に際して熱間後方押出し加工の代わりに、
冷間後方押出し加工を用いれば、精度が良好で偏肉のな
い底付管をつくることができることは周知である。しか
しボンベ用底付管の寸法としては、Ｌ（穴深さ）／Ｄ（
穴径）≧５が必要である。従って冷間加工に際しブラン
クを全面潤滑するのみで、後方押出しをすると、内面に
潤滑切れに起因する焼付が生じ、底付管を製造すること
ができなくなる。しかし、始めに予備成形によりブラン
クに凹部を形成し、そこに固形潤滑剤をみたした後に後
方押出しを行えば、焼付きなしに、Ｌ／Ｄ≧５の底付管
を精度よく製造できる。Instead of hot backward extrusion when manufacturing bottomed tubes,
It is well known that cold backward extrusion can be used to produce bottomed tubes with good precision and no uneven thickness. However, the dimensions of the bottom tube for cylinders are L (hole depth) / D (
Hole diameter) ≧5 is required. Therefore, if the blank is only lubricated on the entire surface during cold working and then extruded backwards, seizure will occur on the inner surface due to lack of lubrication, making it impossible to manufacture a bottomed tube. However, by first forming a recess in the blank by preforming, filling the recess with solid lubricant, and then performing backward extrusion, a bottomed tube with L/D≧5 can be manufactured with high precision without seizure.
つづいて口金部を成形する際にも、焼鈍および潤滑処理
を行った後、口絞り時に胴部が軸方向座屈を生じない範
囲の口絞り率で前方押出しを数回繰り返すことによって
、非常に高い全日絞り率（例えば６０％）の口金部を成
形できることを見いだした。口絞り率が小さいポンペロ
金は１回の冷間押出しで成形できる。Subsequently, when forming the mouthpiece, after annealing and lubrication treatment, forward extrusion is repeated several times at a mouth drawing rate within a range that does not cause axial buckling of the body when drawing the mouth. It has been found that it is possible to mold a mouthpiece with a high all-day drawing rate (for example, 60%). Pompero gold, which has a small mouth drawing ratio, can be formed in one cold extrusion.
かくして本発明の要旨とするところは、アルミニウムま
たはアルミニウム合金ボンベの製造において、ブランク
の冷間予備後方押出しにより、ブランクに窪みを生ぜし
め、前記窪みに固形潤滑剤を載置し、次いで冷間後方押
出しを行って底付管となし、前記底付管の全体または開
口端周辺を焼鈍および潤滑処理した後、口絞り用ダイス
に前記開口端を押付けて開口端を冷間で絞ることにより
口金部を形成せしめることを特徴とするアルミニウムま
たはアルミニウム合金ボンベの製造方法である。Thus, the gist of the present invention is that, in the production of aluminum or aluminum alloy cylinders, a recess is created in the blank by cold preliminary rear extrusion, a solid lubricant is placed in the recess, and then a cold rear extrusion is performed. After extrusion is performed to form a bottomed tube, the entire bottomed tube or the vicinity of the open end is annealed and lubricated, the open end is pressed against a die for neck drawing, and the open end is cold squeezed to form a mouthpiece. This is a method for manufacturing an aluminum or aluminum alloy cylinder, characterized by forming a cylinder.
高い口絞り率のボンベの製造に際しては口絞り用ダイス
により開口端を絞る工程を複数回反復して口金部を形成
することが好ましい。When manufacturing a cylinder with a high necking ratio, it is preferable to form the mouthpiece by repeating the step of squeezing the opening end with a mouth-throwing die multiple times.
さらに、１回当りの口絞り率をほぼ１０％に抑えること
により、口絞り工程の途中で焼鈍を行うことなく非常に
高い口絞り率（例えば６０％）のボンベを製造すること
ができる。Furthermore, by suppressing the neck drawing rate per one time to approximately 10%, it is possible to manufacture a cylinder with a very high neck drawing rate (for example, 60%) without performing annealing in the middle of the neck drawing process.
（作用）
底付管を成形するまでの工程と多段冷間前方押し出し加
工による口絞り工程（口金部の形成工程）に分けて説明
する。(Function) The process up to forming the bottomed tube and the mouth drawing process (the process of forming the mouthpiece part) by multi-stage cold forward extrusion processing will be explained separately.
底仕宣長底工程
第１図Ｃａｌ〜（ｄｌは底付き管を形成する各工程を図
示する。Long bottom process for forming the bottom Figure 1 Cal~ (dl shows each process for forming a bottomed tube.
アルミニウムないしアルミニウム合金のブランク１ （
第１図（ａ））に予備後方押出しを行いブランクｌの端
面に窪み（凹部） ｌａを形成する（第１図（ｂ））。Aluminum or aluminum alloy blank 1 (
In FIG. 1(a)), preliminary backward extrusion is performed to form a depression (recess) la on the end face of the blank l (FIG. 1(b)).
次に固形潤滑剤（金属せっけん類、ボンダリューベ（日
本バーカライジング■登録商標）、Ｍｏ３２等）２を窪
みｌａに載置した後（第１図（Ｃ））、冷間後方押出し
により底付管３を得る（第１図（ｄ））。Next, after placing a solid lubricant (metal soap, Bonda Lube (registered trademark of Nippon Barcalizing), Mo32, etc.) 2 in the depression la (Fig. 1 (C)), the bottomed tube is formed by cold backward extrusion. 3 (Fig. 1(d)).
なおブランク１の硬度が高い場合は後方押出しの前に焼
鈍を行う。Note that if the blank 1 has high hardness, annealing is performed before backward extrusion.
このように本発明においては始めにブランクに窪みを形
成して、この窪みに固形潤滑剤を載置しているので、冷
間後方押し出し加工に際し常に十分な潤滑剤が加工部に
供給される。従って底付管製造に際し潤滑剤の不足から
内面に焼付きを生じる惧れはない。潤滑剤の添加量はＬ
／Ｄが４〜５の場合は６０〜８０ｇ／ ｒｌ 、 Ｌ
／ Ｄが５〜７の場合は８０〜２００ｇ／ｍが望ましい
。In this manner, in the present invention, a depression is first formed in the blank and a solid lubricant is placed in the depression, so that sufficient lubricant is always supplied to the processing section during cold backward extrusion processing. Therefore, when manufacturing the bottomed tube, there is no risk of seizure occurring on the inner surface due to lack of lubricant. The amount of lubricant added is L
/D is 4-5, 60-80g/rl, L
/ When D is 5 to 7, 80 to 200 g/m is desirable.
このように第１図（ａｌ〜ｆｄ＋の方法により、内面に
焼付きのないＬ／Ｄが５以上の底付管を容易に製造でき
る。使用するプレスとしては底付管精度および潤滑剤の
付着性よりタテ型油圧プレスが都合がよい。なお、底付
管の壁厚の胴部外径に対する比率は０．０４〜０．０８
程度である。In this way, by the method shown in Figure 1 (al~fd+), it is possible to easily manufacture a bottomed tube with an L/D of 5 or more without seizure on the inner surface. A vertical hydraulic press is more convenient due to its characteristics.The ratio of the wall thickness of the bottom tube to the outside diameter of the body is 0.04 to 0.08.
That's about it.
旦會皿戻底工程 ′
口絞り用ダイス（プレス）４を用いて、前方押出し加工
（口絞り）によって口金部を成形する（第１図（ｅｌ、
（ｆ））。Process of returning the bottom of the banquet plate ′ Using a die (press) 4 for mouth drawing, the mouth part is formed by forward extrusion processing (mouth drawing) (see Fig. 1 (el,
(f)).
第２図に示す標準的寸法のボンベの口金部径りは、胴部
外径Ｄ０の約４０％しかなく、約６０％の口絞り率が必
要である（口絞り率は（１−Ｄ／Ｄｏ） Ｘ １００（
４）で与えられる）。冷間での１回の押出しで可能な最
大口絞り率は本発明者らの研究では約３０％であり、こ
の値を越えると胴部に軸方向座屈を生じ従って大きな口
絞り率のボンベを得るためには前方押し出し加工を反復
する必要がある。ところが１回当りの口絞り率は最大値
の約３０％以下であっても、加工を反復するとボンへ軸
部（胴部）の座屈応力レベルを越えて胴部に軸方向座屈
を生じてしまう事がある。The mouth diameter of the cylinder with standard dimensions shown in Figure 2 is only about 40% of the body outer diameter D0, and a mouth opening ratio of approximately 60% is required (the mouth opening ratio is (1-D/ Do) X 100 (
4)). According to research conducted by the present inventors, the maximum neck reduction rate possible in one cold extrusion is about 30%, and exceeding this value causes axial buckling of the body, which results in cylinders with a large neck reduction rate. To obtain this, it is necessary to repeat the forward extrusion process. However, even if the per-time drawing rate is approximately 30% or less of the maximum value, repeated processing exceeds the buckling stress level of the shaft (body) of the bong, causing axial buckling in the body. Sometimes it happens.
反復される各前方押出し加工のすべてにおいて座屈応力
以下で約６０％の全日絞り率の加工を行う必要がある。Each repeated forward extrusion process must be performed at a full-day reduction of approximately 60% below the buckling stress.
詳細な実験の結果、約１０％づつの口絞り率の多段冷間
前方押出し加工であれば何回反復しても座屈応力を越え
ないことを本発明者らは見いだしたのである。As a result of detailed experiments, the inventors of the present invention have found that the buckling stress is not exceeded no matter how many times the multi-stage cold forward extrusion process is performed with a narrowing ratio of approximately 10%.
第３図はこれらの実験結果の一部を図示したものである
。上述のように冷間後方押出しで製造した６０６１アル
ミニウム底付管（外径４０ｍａ＋ Ｘ内径３７．２…Ｉ
×長さ１５０１ａｍ）を焼鈍・潤滑した後に、１回の口
絞り率を変化させて、口絞り加工を行った結果を示す。FIG. 3 illustrates some of the results of these experiments. 6061 aluminum bottomed tube manufactured by cold backward extrusion as described above (outer diameter 40 ma + x inner diameter 37.2...I
x length 1501 am) was annealed and lubricated, and then the opening drawing process was performed by changing the opening drawing rate per time.
１回当りの口絞り率を一定として口絞り加工を反復した
場合に胴部（軸部）に座屈を発生しないで全日絞り率６
０％を達成できるのは、１回当りの口絞り率が１０％の
場合のみである。他の口絞り率では、胴部座屈を生じ口
絞り加工が不可能となった。なおこの実験の場合の焼鈍
は多段押出し前に１回行ったのみであった。When the mouth drawing process is repeated at a constant drawing rate per time, the drawing rate is 6 all day long without buckling the body (shaft).
0% can be achieved only when the per-time mouth squeezing rate is 10%. With other neck drawing ratios, buckling of the body occurred, making the neck drawing process impossible. Note that in this experiment, annealing was performed only once before multistage extrusion.
第３図に示された１回当りの口絞り率と座屈発生の関係
は、壁厚の胴部外径に対する比が０．０４〜０．０８の
範囲では同じであった。また胴部長さにも影響されない
。ただし潤滑状態が良好なら、１回の口絞り率が約１９
％づつでも全日絞り率６０％が達成できる。The relationship between the rate of opening per stroke and the occurrence of buckling shown in FIG. 3 was the same when the ratio of the wall thickness to the outer diameter of the body was in the range of 0.04 to 0.08. It is also not affected by trunk length. However, if the lubrication condition is good, the rate of one mouth tightening is approximately 19
% at a time, it is possible to achieve an all-day aperture rate of 60%.
さらに第３図の結果からも分かるように初回の口絞り率
は２０％以上の大きな値とし、それ以後は徐々に減少さ
せて口絞り率を１０％以下に抑えることにより座屈を越
すことな（能率的に口金を形成することができる（実施
例口絞りスケジュール参照）。Furthermore, as can be seen from the results in Figure 3, the initial opening rate is set to a large value of 20% or more, and thereafter it is gradually decreased to keep the opening rate to 10% or less to avoid exceeding buckling. (The mouthpiece can be formed efficiently (see example mouth drawing schedule).
なお多段冷間前方押出しはトランスファープレスを用い
れば非常に容易に高能率で行うことが可能である。Note that multistage cold forward extrusion can be carried out very easily and with high efficiency by using a transfer press.
（実施例）
各寸法の規格を次のように定めたアルミニウムボンベを
本発明法により製造した（第２図）：全長！！
： ２２０ｍｍ口金部径Ｄ ： ２Ｏｎ
＋ｎ＋胴部外径り、 ： ５０ｍｍ
胴部内径Ｄ＋ ： ４３ｍｍ
胴部壁厚Ｌ＋ ： ３．５＋１ｌＩ１１口金部壁
＊ｔ２： ７ｍｍｍｍ
以上臼率半径Ｒ： ３０ｍｍ
次にボンベの製造について底付管形成までと口金部形成
の工程に分けて説明する。(Example) An aluminum cylinder was manufactured by the method of the present invention with the specifications of each dimension as follows (Figure 2): Total length! !
: 220mm Base diameter D : 2On
+n+Body outer diameter: 50mmBody inner diameter D+: 43mmBody wall thickness L+: 3.5+1lI11 mouth wall*t2: 7mmmm or more Mortar radius R: 30mm Next, regarding the production of the cylinder, up to the formation of the bottom tube. The process of forming the cap part will be explained separately.
底付主豆長底工丘
６０６１アルミニウム材から直径５０ｍｍ ｘ長さ７０
ｍｍのブランクを切り出し、４００℃で１時間加熱後空
冷して焼鈍する。その後、アルポンド３２９９とボンダ
リューベ（いづれも日本パー力うイジング■登録商標）
を用いて潤滑後、油圧プレスにて、予備後方押出しを行
い、四部に固形潤滑剤（例えば、ステアリン酸カルシウ
ム）を満たす。この添加量は１００ｇ／ｎ？である。つ
づいて、本後方押出しにより、表面粗さの優れた、偏心
のほとんどない、Ｌ／Ｄ＝５．３の底付管を製造した。Main bean with bottom long sole Kooka 6061 made of aluminum material diameter 50mm x length 70
A blank of mm is cut out, heated at 400° C. for 1 hour, and then air cooled and annealed. After that, Alpond 3299 and Bonda Lube (both registered trademarks of Nippon Parr Power Ising)
After lubrication using a hydraulic press, preliminary backward extrusion is performed to fill the four parts with a solid lubricant (for example, calcium stearate). Is this amount added 100g/n? It is. Subsequently, by this backward extrusion, a bottomed tube with excellent surface roughness, almost no eccentricity, and L/D=5.3 was manufactured.
内面に焼付はみられなかった。No burning was observed on the inner surface.
ＬｊＪＩシ創１楳
ひきつづいて、焼鈍（４００℃で１時間加熱後空冷）お
よび潤滑（上記の予備後方押出し前の潤滑と同様）を行
った後、多段冷間前方押出し加工により、口金部を成形
した。口絞りスケジュールは、次のスケジュール■また
はスケジュール■に従った：
口金部径口絞りスケジュール■：
５０ｍｍ−３６，５ｍｍ→３２．８ｍｍ−２９，５ｍｍ
−２６，６ｍｓ＋→２３．９ｍｍ−２１，５ｍｍ→２０
．Ｏｍｍ口金部径口絞りスケジュール■：
５０ｎｍ→４３．５ｍｍ−３７．８ｍｍ−３２，９ｍｍ
−２８，６ｍｎ＋−潤滑→２４．９ｍｍ−２１，９ｍｍ
＝２０．０ｍｍスケジュールＩ、■のいづれを用いた場
合も良好に口金部が成形でき胴部には全く座屈はみられ
なかった。実施例では途中での焼鈍はせずに口絞りを行
ったが、材料の変形能に問題があれば途中で焼鈍を行え
ば良い。After annealing (heating at 400°C for 1 hour followed by air cooling) and lubrication (same as the lubrication before the preliminary backward extrusion described above), the mouth part is formed by multi-stage cold forward extrusion. did. The mouth drawing schedule followed the following schedule ■ or schedule ■: Mouth diameter mouth drawing schedule ■: 50 mm - 36,5 mm → 32.8 mm - 29,5 mm
-26,6ms+→23.9mm-21,5mm→20
．． Omm mouth opening schedule ■: 50nm → 43.5mm-37.8mm-32.9mm
-28,6mn+-lubrication →24.9mm-21,9mm
= 20.0 mm When either Schedule I or ■ was used, the cap part could be formed well and no buckling was observed in the body part. In the example, the mouth drawing was performed without annealing midway, but if there is a problem with the deformability of the material, annealing may be performed midway.
口金部付近壁厚１．は、胴部壁厚１．の約２倍が必要で
あるが試作品を調査のために切断し測定したところ、約
２．０５倍でり良好な増肉率を示した。Wall thickness near the mouthpiece 1. is the body wall thickness 1. However, when a prototype was cut and measured for investigation, it was found to be approximately 2.05 times larger, indicating a good thickness increase rate.
なお、本発明はアルミニウム、アルミニウム合金のみな
らず、鉄系、銅系各種材料のボンベの製造に適用可能で
ある。Note that the present invention is applicable to manufacturing cylinders not only of aluminum and aluminum alloys but also of various iron-based and copper-based materials.
（発明の効果）
本発明によれば口金部の成形を含め、すべての加工が冷
間で精度よく行われ、切削加工に伴う歩留減や、コスト
の上昇、熱間加工に付随する精度悪化等の心配がなくな
る。(Effects of the Invention) According to the present invention, all processing, including the molding of the mouthpiece, is performed cold and with high precision, resulting in reduced yield and increased cost due to cutting, and deterioration of accuracy due to hot processing. You no longer have to worry about things like that.
従って本発明によればアルミニウムないしアルミニウム
合金製ガスボンベを低コストで高精度で製造することが
できる。Therefore, according to the present invention, a gas cylinder made of aluminum or an aluminum alloy can be manufactured at low cost and with high precision.
第１図＋ａｌ〜（「）は、本発明によるボンベ製造の各
工程を示す断面図；
第２図は、ボンへの諸元を示すボンベの断面図；および
第３図は、本発明による口金部形成工程における口絞り
圧力の推移を示すグラフである。
１： ブランク
２： 固形潤滑剤
３： 底付管
４： 口絞りダイス （プレス）
出願人 住友金属工業株式会社 （外１名）代理人 弁
理士 広 瀬 章 −（外１名）３、、） 判
圀Figure 1+al~(') is a cross-sectional view showing each step of cylinder manufacturing according to the present invention; Figure 2 is a cross-sectional view of the cylinder showing specifications for the cylinder; and Figure 3 is a cap according to the present invention. It is a graph showing the transition of the mouth drawing pressure in the part forming process. 1: Blank 2: Solid lubricant 3: Bottomed tube 4: Mouth drawing die (press) Applicant: Sumitomo Metal Industries, Ltd. (1 other person) Agent Patent Attorney Akira Hirose - (1 other person) 3,,) Hankoku
Claims (3)
造において、ブランクの冷間予備後方押出しにより、ブ
ランクに窪みを生ぜしめ、前記窪みに固形潤滑剤を載置
し、次いで冷間後方押出しを行って底付管となし、前記
底付管の全体または開口端周辺を焼鈍および潤滑処理し
た後、口絞り用ダイスに前記開口端を押付けて開口端を
冷間で絞ることにより口金部を形成せしめることを特徴
とするアルミニウムまたはアルミニウム合金ボンベの製
造方法。(1) In the production of aluminum or aluminum alloy cylinders, a depression is created in the blank by cold preliminary backward extrusion of the blank, a solid lubricant is placed in the depression, and then cold backward extrusion is performed to form a bottomed tube. After annealing and lubricating the entire bottomed tube or the vicinity of the opening end, the opening end is pressed against a mouth drawing die and the opening end is cold drawn to form a mouthpiece. A method for manufacturing aluminum or aluminum alloy cylinders.
反復して口金部を形成することを特徴とする特許請求の
範囲第１項記載のアルミニウムまたはアルミニウム合金
ボンベの製造方法。(2) The method for manufacturing an aluminum or aluminum alloy cylinder according to claim 1, characterized in that the mouth part is formed by repeating the step of narrowing the opening end with a mouth drawing die a plurality of times.
ほぼ１０％以下に抑えることを特徴とする特許請求の範
囲第２項記載のアルミニウムまたはアルミニウム合金ボ
ンベの製造方法。(3) The method for producing an aluminum or aluminum alloy cylinder as set forth in claim 2, characterized in that the rate of opening per opening in the step of squeezing the opening end is suppressed to approximately 10% or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31996287A JPH01162536A (en) | 1987-12-16 | 1987-12-16 | Manufacture of bomb |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31996287A JPH01162536A (en) | 1987-12-16 | 1987-12-16 | Manufacture of bomb |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01162536A true JPH01162536A (en) | 1989-06-27 |
Family
ID=18116193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31996287A Pending JPH01162536A (en) | 1987-12-16 | 1987-12-16 | Manufacture of bomb |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01162536A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996011757A1 (en) * | 1994-10-13 | 1996-04-25 | British Aluminium Holdings Limited | Backward extrusion method and product |
-
1987
- 1987-12-16 JP JP31996287A patent/JPH01162536A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996011757A1 (en) * | 1994-10-13 | 1996-04-25 | British Aluminium Holdings Limited | Backward extrusion method and product |
| US5964117A (en) * | 1994-10-13 | 1999-10-12 | Luxfer Group Limited | Backward extrusion method and product |
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