JPH06335733A - Method for drawing al-base blank - Google Patents
Method for drawing al-base blankInfo
- Publication number
- JPH06335733A JPH06335733A JP5125605A JP12560593A JPH06335733A JP H06335733 A JPH06335733 A JP H06335733A JP 5125605 A JP5125605 A JP 5125605A JP 12560593 A JP12560593 A JP 12560593A JP H06335733 A JPH06335733 A JP H06335733A
- Authority
- JP
- Japan
- Prior art keywords
- blank
- based blank
- thickness
- bead
- base blank
- 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.)
- Granted
Links
Landscapes
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、純ＡｌまたはＡｌ合金
よりなるＡｌ系ブランクの絞り加工法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for drawing an Al-based blank made of pure Al or an Al alloy.
【０００２】[0002]
【従来の技術】従来、スチール系ブランクの絞り加工法
としては、大型ダブルアクション機械プレスにしわ押え
制御成形装置を付設して、絞り過程途中でしわ押え圧を
変化させる、といった方法が知られている（例えば、特
開平２−３７９２２号公報参照）。2. Description of the Related Art Conventionally, as a drawing method for steel blanks, there has been known a method in which a large double-action mechanical press is provided with a creasing press control forming device to change the creasing presser pressure during the drawing process. (See, for example, JP-A-2-37922).
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、従来法
においては、高価なしわ押え制御成形装置を必要とし、
また絞り加工時間も比較的長いため、成形品の製造コス
トが高くなる、といった問題があり、したがって従来法
をＡｌ系ブランクの絞り加工に応用することは適当では
ない。However, the conventional method requires an expensive wrinkle presser control molding device,
Further, since the drawing time is relatively long, there is a problem that the manufacturing cost of the molded product becomes high. Therefore, it is not appropriate to apply the conventional method to the drawing of an Al-based blank.
【０００４】本発明は前記に鑑み、Ａｌ系ブランクの極
低温特性を利用すると共に絞り加工用金型に簡単な工夫
を施すことにより、しわの発生がなく、寸法精度の高い
高品質な成形品を高能率で量産することのできる前記Ａ
ｌ系ブランクの絞り加工法を提供することを目的とす
る。In view of the above, the present invention takes advantage of the cryogenic characteristics of Al-based blanks and makes a simple modification in the drawing die to prevent wrinkles from occurring and to provide high-quality molded products with high dimensional accuracy. A that can mass-produce
An object is to provide a drawing method for l-type blanks.
【０００５】[0005]
【課題を解決するための手段】本発明に係るＡｌ系ブラ
ンクの絞り加工法は、しわ押え面にビードを有する一方
の絞り加工用金型と、しわ押え面に前記ビードに対向す
る凹部を有する他方の絞り加工用金型とを合せて、両金
型間に、−５０℃以下に冷却されて常温時よりも厚さが
小であるＡｌ系ブランクを、その外縁が前記ビードより
も外方に位置するように介在させると共に両しわ押え面
間の間隔をスペーサによって、冷却時における前記Ａｌ
系ブランクの厚さよりも大に規制し、次いで一方の金型
の凹形成形部と他方の金型の凸形成形部との協働により
前記Ａｌ系ブランクに絞り加工を施し、その絞り加工前
半期においては、前記Ａｌ系ブランクの前記凹形成形部
へのすべり込みを、前記スペーサの前記間隔規制作用に
よって増進させ、一方、絞り加工後半期においては、前
記Ａｌ系ブランクの温度上昇による厚さ増に伴い、前記
ビードおよび凹部間における前記Ａｌ系ブランクのすべ
り抵抗を高めて、そのＡｌ系ブランクに付加される張力
を増大させることを特徴とする。A method for drawing an Al blank according to the present invention comprises one drawing die having a bead on a wrinkle holding surface, and a recess facing the bead on the wrinkle holding surface. Together with the other drawing die, an Al-based blank that is cooled to -50 ° C or less and has a smaller thickness than that at normal temperature is placed between the two dies, and the outer edge of the blank is outside the bead. And the space between both wrinkle holding surfaces by a spacer to prevent the Al
The thickness of the Al-based blank is regulated to be larger than the thickness of the system blank, and then the Al-based blank is subjected to a drawing process in cooperation with the concave forming part of one mold and the convex forming part of the other mold, and the first half of the drawing process is performed. In the first stage, the slippage of the Al-based blank into the recessed shape portion is promoted by the spacing regulating action of the spacer, while in the latter half of the drawing process, the thickness of the Al-based blank increases due to the temperature rise. Accordingly, the sliding resistance of the Al-based blank between the bead and the recess is increased, and the tension applied to the Al-based blank is increased.
【０００６】[0006]
【作用】Ａｌ系ブランクは、−５０℃以下に冷却される
と、常温時よりも収縮すると共に耐力、引張強さおよび
伸びが著しく向上する、といった極低温特性を有する。When the Al blank is cooled to -50 ° C or lower, it shrinks more than at room temperature, and the yield strength, tensile strength and elongation are remarkably improved.
【０００７】絞り加工前半期においては、Ａｌ系ブラン
クの前記極低温特性を利用すると共にスペーサによる間
隔規制作用を得て、Ａｌ系ブランクの凹形成形部へのす
べり込みを増進させるので、Ａｌ系ブランクに対する絞
り込みがスムーズに、且つ迅速に行われる。In the first half of the drawing process, the cryogenic characteristics of the Al-based blank are utilized, and the spacing control action of the spacer is obtained to enhance the slippage of the Al-based blank into the recessed portion. Is narrowed down smoothly and quickly.
【０００８】絞り加工後半期においては、Ａｌ系ブラン
クの温度が上昇して、その厚さが増し、これによりビー
ドおよび凹部間におけるＡｌ系ブランクのすべり抵抗を
高めて、Ａｌ系ブランクに付加される張力を増大させる
ので、Ａｌ系ブランクの張出しが確実に行われて成形品
におけるしわの発生が回避される。In the latter half of the drawing process, the temperature of the Al-based blank rises and its thickness increases, thereby increasing the sliding resistance of the Al-based blank between the bead and the recess and adding it to the Al-based blank. Since the tension is increased, the Al-based blank is surely bulged to prevent the formation of wrinkles in the molded product.
【０００９】[0009]
【実施例】図１は、絞り加工後の成形品１を示し、その
成形品１は、一端に開口２を有する方形の底付器体３
と、その開口２の外周縁に沿って連設された方形のフラ
ンジ４とよりなる。フランジ４には、開口２の各辺に沿
う変形部５が成形されており、それら変形部５は器体３
の開口２側では凹んでいるが、器体３の底壁６側では出
張っている。各変形部５は絞り加工中にビードおよびそ
れと対向する凹部との協働で成形されたものであり、し
たがって、このような変形部５を有するフランジ４はト
リミング加工によって器体３より除去される。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a molded product 1 after drawing, which molded product 1 is a rectangular bottomed body 3 having an opening 2 at one end.
And a rectangular flange 4 continuously provided along the outer peripheral edge of the opening 2. The flange 4 is formed with deformed portions 5 along each side of the opening 2, and these deformed portions 5 are formed in the body 3
It is recessed on the side of the opening 2 but is on a business trip on the side of the bottom wall 6 of the body 3. Each of the deformed portions 5 is formed by cooperation of the bead and the concave portion opposed thereto during the drawing process, and therefore the flange 4 having such deformed portions 5 is removed from the body 3 by the trimming process. .
【００１０】成形品１は、Ａｌ合金である５１８２−Ｏ
材よりなるＡｌ系ブランクに絞り加工を施して得られた
ものである。The molded product 1 is 5182-O which is an Al alloy.
It is obtained by subjecting an Al-based blank made of a material to drawing processing.
【００１１】このＡｌ系ブランクは、常温（２０℃）に
て１．０mmの厚さを有するが、極低温下では収縮してそ
の厚さが常温時よりも小となる。This Al blank has a thickness of 1.0 mm at room temperature (20 ° C.), but it shrinks at extremely low temperatures and its thickness becomes smaller than that at room temperature.
【００１２】表１は、Ａｌ系ブランクを−１９６℃の液
体窒素に浸漬したときのＡｌ系ブランクの温度と厚さと
の関係を示す。Table 1 shows the relationship between the temperature and the thickness of the Al blank when the Al blank was immersed in liquid nitrogen at -196 ° C.
【００１３】[0013]
【表１】 またＡｌ系ブランクには、その冷却に先立って潤滑油が
塗布される。この潤滑油には、−５０℃以下において固
化してもＡｌ系ブランクから剥離することのない付着性
を発揮し、また常温下においては液化して潤滑能を発揮
する、といった特性が要求される。[Table 1] Lubricating oil is applied to the Al blank before cooling. This lubricating oil is required to have such properties that it exhibits adhesiveness that does not separate from the Al-based blank even when solidified at -50 ° C or lower, and that it liquefies at normal temperature to exert its lubricating ability. .
【００１４】このような特性を有する潤滑油には、天然
油脂のみからなる潤滑油、天然油脂と天然油脂重合体と
よりなる混合潤滑油、天然油脂と高分子化合物とよりな
る混合潤滑油等が該当する。Lubricating oils having such characteristics include lubricating oils composed only of natural oils and fats, mixed lubricating oils composed of natural oils and fats and polymers of natural oils and fats, mixed lubricating oils composed of natural oils and polymers. Applicable
【００１５】天然油脂はトリグリセリドを主体とし、−
５０℃以下において固化しても脆化しにくく、またカル
ボキシル基を有するのでＡｌ系ブランクに対する付着性
は良好である。天然油脂の平均分子量は約１０００であ
る。Natural fats and oils are mainly composed of triglycerides,
Even if it solidifies at 50 ° C. or less, it does not easily become brittle, and since it has a carboxyl group, it has good adhesion to an Al blank. The average molecular weight of natural fats and oils is about 1000.
【００１６】天然油脂重合体は、天然油脂に加熱下で酸
素を吹込んで重合させたものであり、−５０℃以下にお
いて柔軟性を有する。天然油脂重合体の平均分子量は天
然油脂の２〜４倍である。The natural fat / oil polymer is a polymer obtained by blowing oxygen into a natural fat / oil under heating to polymerize it, and has flexibility at −50 ° C. or lower. The average molecular weight of the natural fat and oil polymer is 2 to 4 times that of the natural fat and oil.
【００１７】高分子化合物としては、ポリブテン、αオ
レフィン−エチレン共重合体、ポリブタジエン、ポリア
クリル酸エステル等が用いられ、要するに高分子量を有
し、且つ低粘度のものが望ましい。As the polymer compound, polybutene, α-olefin-ethylene copolymer, polybutadiene, polyacrylic acid ester and the like are used. In short, those having a high molecular weight and a low viscosity are desirable.
【００１８】図２，図３は、成形品１の製造に用いられ
る絞り加工用金型６，７を示す。上側の絞り加工用金型
６は、その中央に在って下向きの開口を有すると共に底
付器体３に対応する凹形成形部（ダイス孔）８と、その
凹形成形部８の下向き開口周囲に在ってフランジ４に対
応するしわ押え面９を備えており、昇降自在に構成され
る。凹形成形部８の下向き開口近傍において、そのしわ
押え面９には下向き開口の各辺に沿うように、変形部５
に対応する４つの凹部１０が形成される。2 and 3 show drawing dies 6 and 7 used for manufacturing the molded product 1. The upper drawing die 6 has a downward opening in the center thereof and also has a concave forming portion (die hole) 8 corresponding to the bottom attached body 3 and a downward opening of the concave forming portion 8. It is provided with a wrinkle holding surface 9 corresponding to the flange 4 around the periphery, and is configured to be movable up and down. In the vicinity of the downward opening of the concave forming portion 8, the deformable portion 5 is formed on the wrinkle holding surface 9 along each side of the downward opening.
The four recesses 10 corresponding to are formed.
【００１９】下側の絞り加工用金型７は、凹形成形部８
と同軸上に在って上向き開口を有するガイド孔１１およ
びそのガイド孔１１の上向き開口周囲に存するしわ押え
面１２を持つ固定の金型本体１３と、ガイド孔１１に摺
動自在に嵌合された凸形成形部（ポンチ）１４とを備え
ている。The lower drawing die 7 has a concave forming portion 8
A fixed mold body 13 having a guide hole 11 coaxially located with an upward opening and a wrinkle holding surface 12 around the upward opening of the guide hole 11, and a guide hole 11 slidably fitted in the guide hole 11. And a convex forming portion (punch) 14.
【００２０】ガイド孔１１の上向き開口近傍において、
そのしわ押え面１２には各凹部１０に対向するように４
つのビード１５が突設される。またしわ押え面１２の外
縁部全周に亘って複数のスペーサ１６が略等間隔に突設
される。各スペーサ１６の突出長ａは、−５０℃以下、
本実施例では−１９６℃に冷却されたＡｌ系ブランク１
７の厚さｂよりも大（ａ＞ｂ）に設定され、本実施例で
は突出長ａはａ＝０．９７５mmである。In the vicinity of the upward opening of the guide hole 11,
The wrinkle holding surface 12 is provided with 4 so as to face each recess 10.
Two beads 15 are projected. In addition, a plurality of spacers 16 are provided so as to project at substantially equal intervals over the entire outer edge of the wrinkle holding surface 12. The protrusion length a of each spacer 16 is −50 ° C. or less,
In this example, the Al-based blank 1 cooled to −196 ° C.
7 is set to be larger than the thickness b (a> b), and the protrusion length a is 0.975 mm in this embodiment.
【００２１】両絞り加工用金型６，７内にはそれぞれ導
油路１８，１９が設けられており、それら導油路１８，
１９に熱油を流通させることによって両金型６，７のし
わ押え面９，１２、凹形成形部８および凸形成形部１４
の表面を保温し得るようになっている。Oil guide passages 18 and 19 are provided in the two drawing dies 6 and 7, respectively.
By circulating hot oil through 19, the wrinkle holding surfaces 9, 12 of both molds 6, 7, concave forming portion 8 and convex forming portion 14 are formed.
The surface of the can be kept warm.
【００２２】次に、成形品１の絞り加工作業について説
明する。Next, the drawing work of the molded product 1 will be described.
【００２３】（ａ） 常温下において、厚さ１．０mmの
Ａｌ系ブランク（５１８２−Ｏ材）１７の表裏両面に、
天然油脂と天然油脂重合体とよりなる混合潤滑油を塗布
し、次いでＡｌ系ブランク１７を−１９６℃の液体窒素
に浸漬して同温度（−１９６℃）に冷却されたＡｌ系ブ
ランク１７を得た。このＡｌ系ブランク１７の厚さｂ
は、表１に示すようにｂ＝０．９６５mmであり、また混
合潤滑油は凍った状態でＡｌ系ブランク１７の表裏両面
に付着していて剥離は認められなかった。(A) At room temperature, on both front and back surfaces of a 1.0 mm thick Al blank (5182-O material) 17,
A mixed lubricating oil composed of natural fat and oil and a natural fat and oil polymer was applied, and then the Al blank 17 was immersed in liquid nitrogen at -196 ° C to obtain an Al blank 17 cooled to the same temperature (-196 ° C). It was Thickness b of this Al-based blank 17
As shown in Table 1, b = 0.965 mm, and the mixed lubricating oil adhered to both the front and back surfaces of the Al blank 17 in the frozen state, and no peeling was observed.
【００２４】（ｂ） 図２，図３に示すように、Ａｌ系
ブランク１７を下側の絞り加工用金型７の各ビード１５
上に載置した。この場合、Ａｌ系ブランク１７の全外縁
は各ビード１５よりも外方に位置し、且つ各スペーサ１
６よりも内方に位置する。(B) As shown in FIGS. 2 and 3, each bead 15 of the Al-type blank 17 is attached to the lower drawing die 7.
Placed on top. In this case, the entire outer edge of the Al-based blank 17 is located outside each bead 15, and each spacer 1
Located inward of 6.
【００２５】また両絞り加工用金型６，７の両しわ押え
面９，１２の温度および凹、凸形成形部８，１４の表面
温度を、それらに極低温のＡｌ系ブランク１７が接触し
ても、絞り加工作業中、即ち、下側の絞り加工用金型７
へのＡｌ系ブランク１７の載置から後述する成形品１の
取出しまでＡｌ系ブランク１７の温度よりも高い温度、
本実施例では常温に保持すべく、両金型６，７の導油路
１８，１９に熱油を流通させた。Further, the temperatures of the wrinkle holding surfaces 9, 12 and the surface temperatures of the concave and convex forming portions 8, 14 of the both drawing dies 6, 7 are controlled by the cryogenic Al-based blank 17 contacting them. Even during drawing work, that is, the lower drawing die 7
A temperature higher than the temperature of the Al-based blank 17 from the placement of the Al-based blank 17 to the removal of the molded article 1 described later,
In this embodiment, hot oil was circulated in the oil passages 18 and 19 of both molds 6 and 7 in order to keep it at room temperature.
【００２６】（ｃ） 図４に示すように、上側の絞り加
工用金型６を下降させて両金型６，７を合せ、両金型
６，７間にＡｌ系ブランク１７をその全外縁が全ビード
１５よりも外方に位置するように介在させると共に両し
わ押え面９，１２間の間隔を各スペーサ１６の突出長ａ
＝０．９７５mmに規制した。Ａｌ系ブランク１７の厚さ
ｂはｂ＝０．９６５mmであるからＡｌ系ブランク１７と
両しわ押え面９，１２間には０．０１０mmのクリアラン
スが生じており、したがってＡｌ系ブランク１７の凹形
成形部８近傍部分は各ビード１５により軽く押圧されて
いる状態にある。(C) As shown in FIG. 4, the upper drawing die 6 is lowered to bring the two dies 6 and 7 into contact with each other, and the Al-based blank 17 is placed between the two dies 6 and 7 along the entire outer edge thereof. Are placed so as to be located outside all the beads 15, and the distance between the wrinkle holding surfaces 9 and 12 is set to the protrusion length a of each spacer 16.
= 0.975 mm. Since the thickness b of the Al-based blank 17 is b = 0.965 mm, a clearance of 0.010 mm is generated between the Al-based blank 17 and the wrinkle holding surfaces 9 and 12, and therefore, the concave formation of the Al-based blank 17 is formed. The portion near the shaped portion 8 is in a state of being lightly pressed by each bead 15.
【００２７】（ｄ） 凸形成形部１４を上方へ摺動させ
て、その凸形成形部１４と凹形成形部８との協働により
Ａｌ系ブランク１７に絞り加工を施した。(D) The convex forming part 14 was slid upward, and the Al blank 17 was subjected to a drawing process by the cooperation of the convex forming part 14 and the concave forming part 8.
【００２８】Ａｌ系ブランク１７は、−１９６℃に冷却
されているので、常温時よりも収縮すると共に耐力、引
張強さおよび伸びが著しく向上する、といった極低温特
性を有する。Since the Al blank 17 is cooled to -196 ° C., it has a very low temperature characteristic that it shrinks more than at room temperature and the yield strength, tensile strength and elongation are remarkably improved.
【００２９】したがって、図５に示す絞り加工前半期に
おいては、Ａｌ系ブランク１７の前記極低温特性を利用
し、また各スペーサ１６による間隔規制作用および混合
潤滑油の溶解による潤滑作用を得て、Ａｌ系ブランク１
７の凹形成形部８へのすべり込みが増進されるので、Ａ
ｌ系ブランク１７に対する絞り込みがスムーズに、且つ
迅速に行われる。Therefore, in the first half of the drawing process shown in FIG. 5, the cryogenic characteristics of the Al-based blank 17 are utilized, and the spacing control action by each spacer 16 and the lubrication action by the dissolution of the mixed lubricating oil are obtained. Al blank 1
Since the slippage of the concave portion 7 into the concave portion 8 is enhanced, A
The l-system blank 17 can be narrowed down smoothly and quickly.
【００３０】図６に示す絞り加工後半期においては、各
ビード１５等との摩擦によりＡｌ系ブランク１７の温度
が上昇してその厚さが増し、これにより各ビード１５お
よび各凹部１０間におけるＡｌ系ブランク１７のすべり
抵抗が高められて、Ａｌ系ブランク１７に付加される張
力が増大するので、Ａｌ系ブランク１７の張出しが確実
に行われて成形品１におけるしわの発生が回避される。In the latter half of the drawing process shown in FIG. 6, the temperature of the Al-based blank 17 rises due to the friction with the beads 15 and the like and the thickness thereof increases, whereby the Al between the beads 15 and the recesses 10 is increased. Since the slip resistance of the system blank 17 is increased and the tension applied to the Al system blank 17 is increased, the Al system blank 17 is surely bulged and the occurrence of wrinkles in the molded product 1 is avoided.
【００３１】絞り込み終了時においては、成形品１の温
度が、両金型６，７からの熱伝導およびそれら６，７と
の摩擦により上昇して、その肉厚が、Ａｌ系ブランク１
７の常温時における厚さに近似するので、両金型６，７
間の成形空間２０は成形品１によって略満されていた。At the end of the narrowing, the temperature of the molded product 1 rises due to the heat conduction from both molds 6 and 7 and the friction with these molds 6 and 7, and the thickness thereof is the Al-based blank 1
7 is similar to the thickness at room temperature, so both dies 6, 7
The molding space 20 between them was substantially filled with the molded product 1.
【００３２】以後、上側の絞り加工用金型６を上昇さ
せ、また凸形成形部１４を下方へ摺動させて成形品１を
両金型６，７間より取出した。Thereafter, the drawing die 6 on the upper side was raised and the convex forming portion 14 was slid downward, so that the molded product 1 was taken out from between the two dies 6 and 7.
【００３３】下側の絞り加工用金型７へのＡｌ系ブラン
ク１７の載置から成形品１の取出しまでの絞り加工時間
は１．５秒間であった。また取出し直後の成形品１にお
いて、底付器体３の温度は−４０℃であり、一方、フラ
ンジ４の温度は−５０℃であった。The drawing time from the placement of the Al blank 17 on the lower drawing die 7 to the removal of the molded product 1 was 1.5 seconds. In the molded product 1 immediately after being taken out, the temperature of the bottomed container 3 was −40 ° C., while the temperature of the flange 4 was −50 ° C.
【００３４】成形品１の性状を調べたところ、しわの発
生はなかった。また寸法精度も高いもので、前記のよう
な低温下で成形品１を両金型６，７間から取外しても形
状凍結性が良好であることが判明した。When the properties of the molded product 1 were examined, no wrinkles were found. It was also found that the dimensional accuracy is high, and the shape fixability is good even when the molded product 1 is removed from between the molds 6 and 7 at the low temperature as described above.
【００３５】したがって、前記絞り加工法によれば、高
品質なＡｌ系成形品１を高能率で量産することができ
る。Therefore, according to the drawing method, it is possible to mass-produce the high-quality Al-based molded product 1 with high efficiency.
【００３６】前記絞り加工法を繰返し行うことによっ
て、高品質なＡｌ系成形品１を製造するために必要な絞
り加工時間を調べたところ、その絞り加工時間は０．５
〜３秒間で充分であり、極めて短くてよいことが判明し
た。When the drawing time required to produce a high quality Al-based molded product 1 was examined by repeating the drawing method, the drawing time was 0.5.
It has been found that ~ 3 seconds is sufficient and can be quite short.
【００３７】また両絞り加工用金型６，７のしわ押え面
９，１２および凹、凸形成形部８，１４を保温すること
なく前記絞り加工作業を行うことが可能である。この場
合、前記のように絞り加工時間が極めて短いので、絞り
加工作業中にしわ押え面９，１２等の温度がＡｌ系ブラ
ンク１７のそれと等しくなるようなことはない。Further, it is possible to perform the drawing work without keeping the temperature of the wrinkle holding surfaces 9 and 12 and the concave and convex forming portions 8 and 14 of both drawing dies 6 and 7. In this case, since the drawing time is extremely short as described above, the temperature of the wrinkle holding surfaces 9 and 12 does not become equal to that of the Al blank 17 during the drawing work.
【００３８】Ａｌ系ブランク１７に付加される張力の増
大を効率的に行うためには、前記実施例のように両しわ
押え面９，１２を保温することが有効であり、また前記
張力増大と成形品１の形状凍結性の向上を図るために
は、前記実施例のように両しわ押え面９，１２および
凹、凸形成形部８，１４を保温することが有効である。In order to efficiently increase the tension applied to the Al-based blank 17, it is effective to keep both the wrinkle pressing surfaces 9 and 12 warm as in the above-mentioned embodiment, and to increase the tension. In order to improve the shape-freezing property of the molded product 1, it is effective to keep both the wrinkle holding surfaces 9 and 12 and the concave and convex forming portions 8 and 14 warm as in the above embodiment.
【００３９】なお、ビード１５は、しわ押え面１２にガ
イド孔１１の上向き開口全周に沿うように設けられ、ま
た凹部１０は、しわ押え面９に凹形成形部８の下向き開
口全周に沿うように設けられることもある。The bead 15 is provided on the wrinkle holding surface 12 along the entire circumference of the upward opening of the guide hole 11, and the recess 10 is formed on the wrinkle holding surface 9 along the entire circumference of the downward opening of the concave forming portion 8. It may be provided along the line.
【００４０】[0040]
【発明の効果】本発明によれば、Ａｌ系ブランクの極低
温特性を利用すると共に絞り加工用金型にビードおよび
凹部ならびにスペーサを設けるといった簡単な工夫を施
すことによって、Ａｌ系ブランクよりしわの発生がな
く、寸法精度の高い高品質な成形品を高能率で量産する
ことができる。EFFECTS OF THE INVENTION According to the present invention, wrinkling of the Al-based blank is reduced by utilizing the cryogenic characteristics of the Al-based blank and by making a simple device such as providing a bead, a recess and a spacer in the drawing die. It is possible to mass-produce high-quality molded products that do not occur and have high dimensional accuracy with high efficiency.
【図１】成形品の斜視図である。FIG. 1 is a perspective view of a molded product.
【図２】下側の絞り加工用金型の平面図であって、図３
の２−２矢視図に相当する。2 is a plan view of a lower drawing die, and FIG.
2-2 is a view corresponding to the arrow.
【図３】上側および下側の絞り加工用金型を開いた状態
を示す縦断面図であって、図２の３−３線断面図に相当
する。3 is a vertical cross-sectional view showing a state where the upper and lower drawing dies are opened, and corresponds to a cross-sectional view taken along line 3-3 of FIG.
【図４】上側および下側の絞り加工用金型を合せた状態
を示す縦断面図である。FIG. 4 is a vertical cross-sectional view showing a state in which upper and lower drawing dies are combined.
【図５】上側および下側の絞り加工用金型による絞り加
工前半期を示す縦断面図である。FIG. 5 is a vertical cross-sectional view showing the first half of a drawing process using upper and lower drawing dies.
【図６】上側および下側の絞り加工用金型による絞り加
工後半期を示す縦断面図である。FIG. 6 is a vertical cross-sectional view showing the latter half of the drawing process by the upper and lower drawing dies.
６，７ 絞り加工用金型 ８ 凹形成形部 ９，１２ しわ押え面 １０ 凹部 １４ 凸形成形部 １５ ビード １６ スペーサ １７ Ａｌ系ブランク 6,7 Drawing die 8 Recessed forming part 9,12 Wrinkle holding surface 10 Recessed part 14 Convex forming part 15 Bead 16 Spacer 17 Al blank
Claims (3)
有する一方の絞り加工用金型（７）と、しわ押え面
（９）に前記ビード（１５）に対向する凹部（１０）を
有する他方の絞り加工用金型（６）とを合せて、両金型
（６，７）間に、−５０℃以下に冷却されて常温時より
も厚さが小であるＡｌ系ブランク（１７）を、その外縁
が前記ビード（１５）よりも外方に位置するように介在
させると共に両しわ押え面（９，１２）間の間隔をスペ
ーサ（１６）によって、冷却時における前記Ａｌ系ブラ
ンク（１７）の厚さよりも大に規制し、次いで一方の金
型（６）の凹形成形部（８）と他方の金型（７）の凸形
成形部（１４）との協働により前記Ａｌ系ブランク（１
７）に絞り加工を施し、その絞り加工前半期において
は、前記Ａｌ系ブランク（１７）の前記凹形成形部
（８）へのすべり込みを、前記スペーサ（１６）の前記
間隔規制作用によって増進させ、一方、絞り加工後半期
においては、前記Ａｌ系ブランク（１７）の温度上昇に
よる厚さ増に伴い、前記ビード（１５）および凹部（１
０）間における前記Ａｌ系ブランク（１７）のすべり抵
抗を高めて、そのＡｌ系ブランク（１７）に付加される
張力を増大させることを特徴とするＡｌ系ブランクの絞
り加工法。1. A drawing die (7) having one bead (15) on a wrinkle holding surface (12) and a recess (10) facing the bead (15) on the wrinkle holding surface (9). Along with the other drawing die (6) having the same, an Al-based blank (17) having a thickness smaller than that at room temperature, which is cooled to -50 ° C or less, is provided between both dies (6, 7). ) Is interposed so that its outer edge is located outside of the bead (15), and the space between both wrinkle holding surfaces (9, 12) is provided by a spacer (16) so that the Al-based blank ( The thickness of the Al is controlled to be larger than the thickness of 17), and then the Al is formed by the cooperation of the concave forming portion (8) of the one die (6) and the convex forming portion (14) of the other die (7). System blank (1
7) is subjected to a drawing process, and in the first half of the drawing process, the slippage of the Al-based blank (17) into the recessed shape part (8) is promoted by the spacing regulating action of the spacer (16). On the other hand, in the latter half of the drawing process, as the thickness of the Al-based blank (17) increases due to the temperature increase, the bead (15) and the recess (1)
A method for drawing an Al-based blank, characterized by increasing the slip resistance of the Al-based blank (17) during 0) to increase the tension applied to the Al-based blank (17).
押え面（９，１２）は、絞り加工作業中において、前記
Ａｌ系ブランク（１７）よりも高い温度を保有する、請
求項１記載のＡｌ系ブランクの絞り加工法。2. The wrinkle holding surface (9, 12) of both drawing dies (6, 7) has a higher temperature than the Al-based blank (17) during drawing work. Item 1. A drawing method of an Al-based blank according to Item 1.
成形部（１４）および凹形成形部（８）は、絞り加工作
業中において、前記Ａｌ系ブランク（１７）よりも高い
表面温度を保有する、請求項１または２記載のＡｌ系ブ
ランクの絞り加工法。3. The convex forming part (14) and the concave forming part (8) of both drawing dies (6, 7) are more than the Al-based blank (17) during drawing work. The method for drawing an Al-based blank according to claim 1 or 2, which has a high surface temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12560593A JP3295179B2 (en) | 1993-05-27 | 1993-05-27 | Drawing method of Al-based blank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12560593A JP3295179B2 (en) | 1993-05-27 | 1993-05-27 | Drawing method of Al-based blank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06335733A true JPH06335733A (en) | 1994-12-06 |
| JP3295179B2 JP3295179B2 (en) | 2002-06-24 |
Family
ID=14914262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12560593A Expired - Fee Related JP3295179B2 (en) | 1993-05-27 | 1993-05-27 | Drawing method of Al-based blank |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3295179B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007287758A (en) * | 2006-04-12 | 2007-11-01 | Fuji Electric Systems Co Ltd | Structure of rail of rack mount |
| JP5950374B1 (en) * | 2015-05-25 | 2016-07-13 | 飯田機械株式会社 | Deep drawing machine |
| JP2021020236A (en) * | 2019-07-26 | 2021-02-18 | 株式会社アイエント | Molding die and press-molding method using the same |
| CN115464049A (en) * | 2022-08-25 | 2022-12-13 | 中国第一汽车股份有限公司 | Wedge shaping method, electronic device and storage medium |
-
1993
- 1993-05-27 JP JP12560593A patent/JP3295179B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007287758A (en) * | 2006-04-12 | 2007-11-01 | Fuji Electric Systems Co Ltd | Structure of rail of rack mount |
| JP5950374B1 (en) * | 2015-05-25 | 2016-07-13 | 飯田機械株式会社 | Deep drawing machine |
| JP2021020236A (en) * | 2019-07-26 | 2021-02-18 | 株式会社アイエント | Molding die and press-molding method using the same |
| CN115464049A (en) * | 2022-08-25 | 2022-12-13 | 中国第一汽车股份有限公司 | Wedge shaping method, electronic device and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3295179B2 (en) | 2002-06-24 |
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