JPH05212478A - Necking die for can - Google Patents
Necking die for canInfo
- Publication number
- JPH05212478A JPH05212478A JP2296092A JP2296092A JPH05212478A JP H05212478 A JPH05212478 A JP H05212478A JP 2296092 A JP2296092 A JP 2296092A JP 2296092 A JP2296092 A JP 2296092A JP H05212478 A JPH05212478 A JP H05212478A
- Authority
- JP
- Japan
- Prior art keywords
- necking
- necking die
- axis
- straight body
- die
- 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.)
- Withdrawn
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、筒状（有底円筒状）
に形成された缶の端部の絞り加工（ネッキング）を行う
際に用いられる、缶のネッキングダイ（以下、「ネッキ
ングダイ」という。）に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a tubular shape (cylindrical shape with a bottom).
The present invention relates to a necking die for a can (hereinafter, referred to as a "necking die") used when performing drawing (necking) of the end portion of the can formed in the above.
【０００２】[0002]
【従来の技術】この種のネッキングダイとして、従来、
図２及び図３に示すものが用いられている。これらの図
に示すネッキングダイ２は、全体が略筒状に形成され、
その外周部には、該ネッキングダイ２を固定するための
リング状の固定部４が設けられている。2. Description of the Related Art As a necking die of this type,
The one shown in FIGS. 2 and 3 is used. The necking die 2 shown in these figures is formed into a substantially tubular shape as a whole,
A ring-shaped fixing portion 4 for fixing the necking die 2 is provided on the outer peripheral portion thereof.
【０００３】ネッキングダイ２の端部側の内径部（図２
のＡ部に相当する部分）には、缶の端部を所定の形状に
絞り加工する、緩やかなＲ面（図１のＤ）が形成された
ネッキング部ｎと、このネッキング部ｎの大径側の端部
に連なり、軸線を含む断面が直線をなす直胴部Ｌ１と、
この直胴部Ｌ１に連なり、軸線方向に沿って拡径する円
錐部Ｃ１とが形成されている。直胴部Ｌ１と円錐部Ｃ１
は、缶とネッキングダイ２の微小な芯ずれを修正し、該
缶の端部をネッキング部ｎになめらかに導くためのガイ
ド部Ｇを構成している。なお、図１において、従来のネ
ッキングダイ２における直胴部Ｌ１及び円錐部Ｃ１は、
破線Ｂ１によって示している。The inner diameter portion of the necking die 2 on the end side (see FIG. 2)
(A portion corresponding to the A portion) of the necking portion n having a gentle R surface (D in FIG. 1) formed by drawing the end portion of the can into a predetermined shape, and a large diameter of the necking portion n. A straight body portion L1 that is continuous with the end portion on the side and has a straight cross section including the axis,
A conical portion C1 is formed which is continuous with the straight body portion L1 and whose diameter increases along the axial direction. Straight body part L1 and conical part C1
Constitutes a guide portion G for correcting a slight misalignment between the can and the necking die 2 and smoothly guiding the end portion of the can to the necking portion n. In FIG. 1, the straight body portion L1 and the conical portion C1 in the conventional necking die 2 are
It is indicated by a broken line B1.
【０００４】ネッキングダイ２の軸線Ｘを含む断面（図
１）において、ネッキングダイ２の軸線Ｘに平行な直線
Ｘ１と、円錐部Ｃ１とがなす角θ１は、ほぼ３０゜にな
っている。また、同じく軸線Ｘを含む断面において、直
胴部Ｌ１と直線Ｘ１がなす角度φは極微小（ほぼ、１.
５゜以下）となっている。In the cross section including the axis X of the necking die 2 (FIG. 1), the angle θ1 formed by the conical portion C1 and the straight line X1 parallel to the axis X of the necking die 2 is approximately 30 °. Similarly, in the cross section including the axis X, the angle φ formed by the straight body portion L1 and the straight line X1 is extremely small (approximately 1.
It is less than 5 °).
【０００５】前記直胴部Ｌ１の軸線方向の長さＬ１の、
円錐部Ｃ１の軸線方向の長さＬc1に対する比、即ち（Ｌ
１／Ｌc1）は、およそ０.５５程度あるいはそれ以上と
なっている。以後、円錐部の軸線方向の長さに対する直
胴部の軸線方向の長さの比を、本明細書において「長さ
比」と言うことにする。Of the length L1 of the straight body portion L1 in the axial direction,
The ratio of the conical portion C1 to the axial length Lc1, ie, (L
1 / Lc1) is about 0.55 or more. Hereinafter, the ratio of the axial length of the straight body portion to the axial length of the conical portion will be referred to as “length ratio” in the present specification.
【０００６】上記構成にかかるネッキングダイ２は、図
４に示すように、内径部に配置されるガイドブロック６
とともに固定配置される。そして、この状態において、
筒状（有底円筒状）の缶８の端部が、軸線Ｘ方向（図４
の矢印Ｉ方向）に押し出され、ネッキングダイ２の円錐
部Ｃ１及び直胴部Ｌ１を経てネッキング部ｎに導かれ、
さらに加重されて、ネッキング部ｎで所定の形状にネッ
キングされるようになっている。As shown in FIG. 4, the necking die 2 having the above-described structure has a guide block 6 arranged in the inner diameter portion.
It is fixedly arranged with. And in this state,
The end portion of the tubular (cylindrical with bottom) 8 has an axial direction X (see FIG. 4).
Of the necking die 2 and is guided to the necking portion n through the conical portion C1 and the straight body portion L1 of the necking die 2,
Further, the necking portion n is further weighted to be necked into a predetermined shape.
【０００７】[0007]
【発明が解決しようとする課題】ところで、上記のよう
なネッキングダイ２においては、缶８を軸線Ｘ方向に押
し出し、該缶８の端部をネッキング部ｎに導く際に、缶
８の端部がガイド部Ｇ（直胴部Ｌ１と円錐部Ｃ１とから
なる部分）に正常に入りにくく、また、缶８の端部が図
５に示すように局部的に座屈してしまう現象が度々生じ
ていた。このような座屈現象が生じた場合には、ガイド
ブロック６とネッキングダイ２の間に挟まった缶を取り
出すため、ガイドブロック６とネッキングダイ２を取り
外してセットし直す必要があり、ネッキング作業を中断
しなければならず、作業効率を低下させる要因となる。
本発明は、このような課題を解決することのできるネッ
キングダイを提供することを目的とする。By the way, in the necking die 2 as described above, when the can 8 is extruded in the direction of the axis X and the end of the can 8 is guided to the necking part n, the end of the can 8 is pushed. Does not easily enter the guide portion G (the portion including the straight body portion L1 and the conical portion C1) normally, and the end portion of the can 8 often buckles locally as shown in FIG. It was When such a buckling phenomenon occurs, it is necessary to remove the guide block 6 and the necking die 2 and set them again in order to take out the can sandwiched between the guide block 6 and the necking die 2. It must be interrupted, which causes a decrease in work efficiency.
It is an object of the present invention to provide a necking die that can solve such problems.
【０００８】[0008]
【課題を解決するための手段】この発明は、内径部に、
缶の端部を所定の形状に絞り加工するネッキング部と、
このネッキング部の大径側の端部に連なり、軸線を含む
断面が直線をなす直胴部と、この直胴部に連なり、軸線
方向に沿って拡径する円錐部とが形成された缶のネッキ
ングダイにおいて、前記缶のネッキングダイの、軸線を
含む断面において、前記円錐部と軸線とがなす角度θを
３４゜〜３８゜の範囲とし、前記直胴部の軸線方向の長
さを、前記円錐部の軸線方向の長さの０．５０倍未満と
したことを特徴とするものである。According to the present invention, the inner diameter portion is
A necking part that draws the end of the can into a predetermined shape,
A straight body portion that is continuous with the end portion on the large diameter side of the necking portion and has a straight cross section including the axis line, and a conical portion that is continuous with the straight body portion and that expands in diameter along the axial direction is formed. In the necking die, in the cross section including the axis of the necking die of the can, the angle θ formed by the conical portion and the axis is in the range of 34 ° to 38 °, and the length of the straight body portion in the axial direction is It is characterized in that it is less than 0.50 times the axial length of the conical portion.
【０００９】[0009]
【作用】上記構成に係るネッキングダイにおいては、軸
線を含む断面において、円錐部と軸線とがなす角度θを
３４゜〜３８゜の範囲としており、この角度は従来の角
度３０゜より大きいため、従来に比べて缶の端部をネッ
キングダイのネッキング部に正常に入れ易い。この角度
θを３３゜以下とした場合、缶のネッキングに要する荷
重が大きくなって缶が座屈しやすくなり、また、この角
度θを３９度以上とすると、円錐部において缶が受ける
軸線方向の抵抗が急増して座屈しやすくなる。In the necking die having the above structure, in the cross section including the axis, the angle θ formed by the conical portion and the axis is in the range of 34 ° to 38 °, which is larger than the conventional angle of 30 °. It is easier to properly insert the end of the can into the necking part of the necking die than in the past. If this angle θ is 33 ° or less, the load required for necking of the can becomes large and the can easily buckles. If this angle θ is set to 39 ° or more, the resistance of the conical portion in the axial direction that the can receives. Will increase rapidly and buckle more easily.
【００１０】また、上記構成に係るネッキングダイで
は、直胴部の軸線方向の長さを、円錐部の軸線方向の長
さの０.５０倍未満としているが、これは、０.５０倍よ
り大きくすると、直胴部において缶が受ける軸線方向の
抵抗が大きくなって、やはり缶が座屈し易くなるためで
ある。Further, in the necking die having the above structure, the axial length of the straight body portion is less than 0.50 times the axial length of the conical portion, but this is 0.50 times. This is because if the value is increased, the resistance in the axial direction that the can receives in the straight body portion increases, and the can also easily buckles.
【００１１】[0011]
【実施例】以下に本発明の実施例を図１を参照して説明
する。本実施例は、前述の図１乃至図３で示したネッキ
ングダイ２において、ガイド部Ｇ（直胴部と円錐部とか
らなる部分）を、図１の実線Ｂ２で示される形状に形成
したことを特徴とする。ネッキング部ｎ、その他の構成
については、前述した従来のネッキングダイと同様であ
り、その説明を省略する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. In the present embodiment, in the necking die 2 shown in FIGS. 1 to 3 described above, the guide portion G (the portion including the straight body portion and the conical portion) is formed in the shape shown by the solid line B2 in FIG. Is characterized by. The necking portion n and other configurations are the same as those of the above-described conventional necking die, and the description thereof will be omitted.
【００１２】本実施例におけるガイド部Ｇには、前述の
従来のネッキングダイ２と同様に、ネッキング部ｎの大
径側の端部に連なり、軸線を含む断面が直線をなす直胴
部Ｌ２と、この直胴部Ｌ２に連なり、軸線Ｘ方向に沿っ
て拡径する円錐部Ｃ２とが形成されている。軸線Ｘを含
む断面において、直胴部Ｌ２と直線Ｘ１がなす角度φは
極微小（ほぼ、１.５゜以下）となっている。そして、
ネッキングダイ２の軸線Ｘを含む断面において、軸線Ｘ
に平行な直線Ｘ１と、円錐部Ｃ２とがなす角θ２は、３
４゜〜３８゜の範囲に設定されている。また、長さ比
（円錐部Ｃ２の軸線方向の長さＬc2に対する直胴部Ｌ２
の軸線方向の長さＬ２の比）は０.５０未満となってい
る。Like the conventional necking die 2 described above, the guide portion G in this embodiment has a straight body portion L2 which is continuous with the end portion on the large diameter side of the necking portion n and has a straight section including the axis. A conical portion C2, which is continuous with the straight body portion L2 and has a diameter increasing along the axis X direction, is formed. In the cross section including the axis X, the angle φ formed by the straight body portion L2 and the straight line X1 is extremely small (approximately 1.5 ° or less). And
In the cross section including the axis X of the necking die 2, the axis X
The angle θ2 formed by the straight line X1 parallel to and the conical portion C2 is 3
It is set in the range of 4 ° to 38 °. Further, the length ratio (the straight body portion L2 with respect to the axial length Lc2 of the conical portion C2)
Ratio of the length L2 in the axial direction of is less than 0.50.
【００１３】上記構成にかかる本実施例のネッキングダ
イ２においては、前述の従来のネッキングダイ２と全く
同様に、図４に示すように、内径部に配置されるガイド
ブロック６とともに固定配置される。そして、この状態
において、筒状（有底円筒状）の缶８の端部が、軸線Ｘ
方向（図４の矢印Ｉ方向）に押し出され、円錐部Ｃ２及
び直胴部Ｌ２を経てネッキング部ｎに導かれ、さらに加
重されて、ネッキング部ｎで所定の形状にネッキングさ
れる。In the necking die 2 of the present embodiment having the above-mentioned structure, just like the conventional necking die 2 described above, as shown in FIG. 4, it is fixedly arranged together with the guide block 6 arranged in the inner diameter portion. .. Then, in this state, the end portion of the cylindrical (bottom cylindrical) can 8 has the axis X
In the direction (arrow I direction in FIG. 4), is guided to the necking portion n through the conical portion C2 and the straight body portion L2, further weighted, and necked into a predetermined shape at the necking portion n.
【００１４】本実施例に係るネッキングダイ２において
は、前記角度θ２（３４゜〜３８゜）が、従来のネッキ
ングダイ２の角度θ１（３０゜）より大きいため、従来
に比べて缶の端部をネッキングダイのガイド部Ｇに正常
に入れ易い。このため、ネッキングの作業効率を高める
ことが可能である。また、θ２を３４゜〜３８゜の範囲
とした場合、缶をネッキング部ｎまで押し出す際に要す
る荷重が著しく小さくなり、缶の端部が座屈しにくくな
る。In the necking die 2 according to this embodiment, since the angle θ2 (34 ° to 38 °) is larger than the angle θ1 (30 °) of the conventional necking die 2, the end portion of the can is larger than the conventional one. It is easy to properly insert into the guide portion G of the necking die. Therefore, it is possible to improve the work efficiency of necking. Further, when θ2 is in the range of 34 ° to 38 °, the load required to push the can to the necking part n is significantly reduced, and the ends of the can are less likely to buckle.
【００１５】[0015]
【表１】 [Table 1]
【００１６】上記表１は、ネッキングダイ２の軸線を含
む断面において該ネッキングダイ２の軸線と円錐部とが
なす角度θ（１ｓｔ入角）を３１゜から１度刻みで変化
させ、かつ、同一角度における長さ比を種々の値に変化
させた場合の、缶のネッキングに要する荷重を示してい
る。この荷重は、１０回の実験値の平均をとった値であ
る。In Table 1 above, the angle θ (1st entry angle) formed by the axis of the necking die 2 and the conical portion in the section including the axis of the necking die 2 is changed from 31 ° in steps of 1 °, and the same. It shows the load required for necking the can when the length ratio in angle is changed to various values. This load is a value obtained by averaging 10 experimental values.
【００１７】表１より、長さ比が０.５０未満の場合、
即ち、０.３５、０.４５及び０.４８の場合について見
ると、θが３３゜から３４゜になった際、荷重が著しく
減少していることがわかる。そして、３４゜〜３８゜の
範囲においては、３１゜〜３３゜の範囲に比べて所用荷
重が著しく小さい。このため、θが３４゜〜３８゜の範
囲においては、缶の端部が座屈しにくくなっていること
がわかる。なお、θが３９゜以上の範囲については、実
験中に缶に座屈が生じたため、荷重を測定しなかった。From Table 1, when the length ratio is less than 0.50,
That is, looking at the cases of 0.35, 0.45 and 0.48, it can be seen that the load is remarkably reduced when θ changes from 33 ° to 34 °. In the range of 34 ° to 38 °, the required load is significantly smaller than that in the range of 31 ° to 33 °. Therefore, it can be seen that the end portion of the can hardly buckles when θ is in the range of 34 ° to 38 °. In the range of θ of 39 ° or more, the load was not measured because the can buckled during the experiment.
【００１８】長さ比が０.５０又はそれ以上の場合に
は、θが３１゜〜３８゜の範囲において、いずれも荷重
が大きくなっている。これは、長さ比が０.５０より大
きくなると、直胴部において缶が受ける軸線方向の抵抗
が大きくなって、缶が座屈し易くなるためと考えられ
る。When the length ratio is 0.50 or more, the load is large in the range of θ of 31 ° to 38 °. It is considered that when the length ratio is larger than 0.50, the resistance of the can in the straight body portion in the axial direction increases and the can easily buckles.
【００１９】このように、前記缶のネッキングダイの、
軸線を含む断面において、円錐部と軸線とがなす角度θ
を３４゜〜３８゜の範囲とし、かつ長さ比を０.５０未
満としたことにより、缶が直胴部及び円錐部において座
屈することがなくなり、滑らかにネッキング部に導かれ
る。Thus, the necking die of the can
In the cross section including the axis, the angle θ between the cone and the axis
Is in the range of 34 ° to 38 ° and the length ratio is less than 0.50, the can is prevented from buckling in the straight body portion and the conical portion and is smoothly guided to the necking portion.
【００２０】[0020]
【発明の効果】以上説明したように、この発明によれ
ば、内径部に、缶の端部を所定の形状に絞り加工するネ
ッキング部と、このネッキング部の大径側の端部に連な
り、軸線を含む断面が直線をなす直胴部と、この直胴部
に連なり、軸線方向に沿って拡径する円錐部とが形成さ
れた缶のネッキングダイにおいて、前記缶のネッキング
ダイの、軸線を含む断面において、前記円錐部と軸線と
がなす角度θを３４゜〜３８゜の範囲とし、前記直胴部
の軸線方向の長さを、前記円錐部の軸線方向の長さの
０．５０倍未満としたことにより、缶が直胴部及び円錐
部において座屈することがなくなり、滑らかにネッキン
グ部に導かれる。従って、作業効率が著しく向上すると
ともに、加工品質も向上する。As described above, according to the present invention, a necking portion for drawing the end portion of the can into a predetermined shape is formed in the inner diameter portion, and the necking portion is connected to the end portion on the large diameter side, In a necking die of a can in which a straight body portion whose cross section including an axis is a straight line and a conical portion which is continuous with the straight body portion and expands in diameter along the axial direction is formed, the axis line of the necking die of the can is In the included cross-section, the angle θ formed by the conical portion and the axis is in the range of 34 ° to 38 °, and the axial length of the straight body portion is 0.50 times the axial length of the conical portion. By setting the ratio to less than, the can does not buckle in the straight body portion and the conical portion, and is smoothly guided to the necking portion. Therefore, the working efficiency is significantly improved and the processing quality is also improved.
【図１】図２のＡ部の拡大図である。FIG. 1 is an enlarged view of part A of FIG.
【図２】ネッキングダイの側断面図である。FIG. 2 is a side sectional view of a necking die.
【図３】同ネッキングダイの正面図である。FIG. 3 is a front view of the necking die.
【図４】缶のネッキングの説明に係る側面図である。FIG. 4 is a side view for explaining necking of a can.
【図５】缶のネックの座屈を示す側面図である。FIG. 5 is a side view showing buckling of a neck of a can.
２ ネッキングダイ ｃ１，Ｃ２ 円錐部 Ｌ１，Ｌ２ 直胴部 ｎ ネッキング部 2 Necking die c1, C2 Cone part L1, L2 Straight body part n Necking part
Claims (1)
加工するネッキング部と、このネッキング部の大径側の
端部に連なり、軸線を含む断面が直線をなす直胴部と、
この直胴部に連なり、軸線方向に沿って拡径する円錐部
とが形成された缶のネッキングダイにおいて、 前記缶のネッキングダイの、軸線を含む断面において、
前記円錐部と軸線とがなす角度θを３４゜〜３８゜の範
囲とし、前記直胴部の軸線方向の長さを、前記円錐部の
軸線方向の長さの０．５０倍未満としたことを特徴とす
る缶のネッキングダイ。1. A necking portion for drawing an end portion of a can into a predetermined shape in an inner diameter portion, and a straight body portion which is continuous with a large diameter end portion of the necking portion and has a straight cross section including an axis. ,
In a necking die of a can that is connected to the straight body portion and a conical portion that expands in diameter along the axial direction is formed, in the cross section including the axis of the necking die of the can,
The angle θ formed by the conical portion and the axis is in the range of 34 ° to 38 °, and the axial length of the straight body portion is less than 0.50 times the axial length of the conical portion. Necking die for cans.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2296092A JPH05212478A (en) | 1992-02-07 | 1992-02-07 | Necking die for can |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2296092A JPH05212478A (en) | 1992-02-07 | 1992-02-07 | Necking die for can |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05212478A true JPH05212478A (en) | 1993-08-24 |
Family
ID=12097167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2296092A Withdrawn JPH05212478A (en) | 1992-02-07 | 1992-02-07 | Necking die for can |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05212478A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102814396A (en) * | 2011-06-09 | 2012-12-12 | 宝山钢铁股份有限公司 | Multi-pass necking die and determination method for die-entrance angles of multi-pass necking die |
| US9358604B2 (en) | 2014-06-12 | 2016-06-07 | Ball Corporation | System for compression relief shaping |
-
1992
- 1992-02-07 JP JP2296092A patent/JPH05212478A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102814396A (en) * | 2011-06-09 | 2012-12-12 | 宝山钢铁股份有限公司 | Multi-pass necking die and determination method for die-entrance angles of multi-pass necking die |
| US9358604B2 (en) | 2014-06-12 | 2016-06-07 | Ball Corporation | System for compression relief shaping |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19990518 |