JPH07214151A - Device for manufacturing tapered square pipe and method thereof - Google Patents
Device for manufacturing tapered square pipe and method thereofInfo
- Publication number
- JPH07214151A JPH07214151A JP6027474A JP2747494A JPH07214151A JP H07214151 A JPH07214151 A JP H07214151A JP 6027474 A JP6027474 A JP 6027474A JP 2747494 A JP2747494 A JP 2747494A JP H07214151 A JPH07214151 A JP H07214151A
- Authority
- JP
- Japan
- Prior art keywords
- stopper
- rectangular tube
- die
- female
- male
- 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- Withdrawn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
Landscapes
- Forging (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は，径の異なる角形鋼管
柱の接続部等に用いて好適な截頭四角錐状のテーパ角管
を製造するテーパ角管の製造装置，およびこのテーパ角
管製造装置を用いて行うテーパ角管の製造方法に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tapered square tube manufacturing apparatus for manufacturing a truncated square pyramid-shaped tapered rectangular tube suitable for use as a connecting portion of rectangular steel tube columns having different diameters, and the tapered rectangular tube. The present invention relates to a method for manufacturing a tapered rectangular tube using a manufacturing apparatus.
【０００２】[0002]
【従来の技術】鉄骨構造の建築物で上階にいくにしたが
って細い径の角形鋼管柱を用いる場合，径の異なる角管
どうしの接続部用として，一般に，図２４に示すように
截頭四角錐状をなすテーパ角管１が用いられる。この種
のテーパ角管１を製造する従来の方法として，鋳造によ
るもの，４枚の台形板材を溶接接続して形成するもの，
所定の展開図形状に裁断した１枚ないし２枚の板材を折
り曲げてテーパ角管形状にした後突き合わせ部を溶接接
続するものなどがある。また，截頭四角錐状の雄型とこ
れに対応する雌型とからなる金型で絞り形成する方法が
ある（特願平４−２２３６４３号の方法はこの方法を採
用している）。2. Description of the Related Art In the case of using a square steel tube column having a diameter smaller as it goes upstairs in a building having a steel structure, it is generally used as a connecting portion between square tubes having different diameters as shown in FIG. A tapered rectangular tube 1 having a pyramid shape is used. As a conventional method of manufacturing this kind of tapered rectangular tube 1, one by casting, one formed by welding and connecting four trapezoidal plate members,
There is one in which one or two plate materials cut into a predetermined development shape are bent to form a tapered rectangular tube shape, and then the abutting portions are welded and connected. Further, there is a method of forming by drawing with a metal mold having a truncated square pyramidal male mold and a female mold corresponding thereto (the method of Japanese Patent Application No. 4-223643 adopts this method).
【０００３】[0003]
【発明が解決しようとする課題】上記の金型による絞り
成形以外の方法は，工程が煩雑であり，製造が容易でな
い。前記金型による絞り成形の方法は，工程は単純であ
るが，絞り成形する際，きわめて大きな加圧力で絞り成
形するから，截頭四角錐状に絞り成形されたテーパ角管
が雌型の内面に強く圧着し，この雌型からテーパ角管を
ノックアウトすることが容易でないという問題がある。
このため，プレス機のラムの中心部にノックアウト用油
圧シンダを設け，この油圧シリンダによりノックアウト
用ブロックを雌型内に押し込んでテーパ角管をノックア
ウトする方法が考えられるが，この方法では，油圧シリ
ンダを設けるので，既設のプレス機を用いて行うことが
困難である。また，絞り成形のプレス動作以外に，油圧
シリンダによるノックアウト工程が別途必要なので，全
工程の時間が長くなり，製造能率が低下する。The method other than the above-mentioned drawing using a die has complicated steps and is not easy to manufacture. The draw forming method using the die has a simple process, but since the draw forming is performed with an extremely large pressing force when the draw forming is performed, the tapered square tube drawn into the truncated quadrangular pyramid shape has an inner surface of the female die. There is a problem that it is not easy to crimp the taper square tube out of this female mold by strongly crimping.
For this reason, a method of providing a knockout hydraulic cinder at the center of the ram of the press machine and pushing the knockout block into the female mold by this hydraulic cylinder to knock out the tapered rectangular tube is conceivable. It is difficult to use the existing press machine because it is equipped with. In addition to the pressing operation for drawing, a knockout process using a hydraulic cylinder is required separately, so the total process time becomes longer and the manufacturing efficiency decreases.
【０００４】本発明は上記事情に鑑みてなされたもの
で，テーパ角管の絞り成形に際して，ノックアウトを容
易にかつ能率的に行うことができるテーパ角管の製造装
置を提供することを目的とし，また，このテーパ角管製
造装置を用いて小さな加圧力でテーパ角管の絞り成形を
行うことができるテーパ角管の製造方法を提供すること
を目的とする。The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an apparatus for manufacturing a tapered rectangular tube, which enables knockout to be easily and efficiently performed when drawing the tapered rectangular tube. It is another object of the present invention to provide a method for manufacturing a tapered rectangular tube, which is capable of drawing a tapered rectangular tube with a small pressure using this tapered rectangular tube manufacturing apparatus.
【０００５】[0005]
【課題を解決するための手段】上記課題を解決する本発
明のテーパ角管の製造装置は，素材角管を截頭四角錐状
の雄型とこれに対応する雌型とで絞り成形してテーパ角
管を製造するテーパ角管の製造装置であって，前記雄型
の上部に，雌型の上下動に伴う分力としての水平方向の
駆動力とばねによる前記と反対方向の駆動力とにより水
平方向前後に移動可能なストッパを設けるとともに，こ
のストッパは，その全体が雄型内に没入可能で，かつ，
絞り成形後の雌型上昇時に雌型の内面に圧着して雌型と
ともに上昇するテーパ角管の上端に接触可能にされたこ
とを特徴とする。In the taper rectangular tube manufacturing apparatus of the present invention for solving the above problems, a material rectangular tube is formed by drawing a truncated square pyramid male mold and a corresponding female mold. A taper rectangular tube manufacturing apparatus for manufacturing a tapered rectangular tube, wherein a horizontal driving force as a component force associated with vertical movement of a female mold and a driving force in the opposite direction by a spring are provided on an upper part of the male mold. By providing a stopper that can be moved back and forth in the horizontal direction, the entire stopper can be immersed in the male mold, and
It is characterized in that when the female mold is lifted after drawing, it is pressed against the inner surface of the female mold so as to be able to come into contact with the upper end of the tapered rectangular tube that rises together with the female mold.
【０００６】請求項２は，請求項１のテーパ角管の製造
装置において，ストッパは，雌型が上昇位置にある時
は，前記ばねにより雄型の中心から外方に向けて付勢さ
れてその一部が雄型の外周面から突出しており，雌型が
下降する際にストッパの突出した先端部が雌型の傾斜し
た内面により押されて雄型の中心方向に移動するように
されたことを特徴とする。According to a second aspect of the present invention, in the tapered rectangular tube manufacturing apparatus according to the first aspect, the stopper is urged outward from the center of the male die by the spring when the female die is in the raised position. Part of it protrudes from the outer peripheral surface of the male mold, and when the female mold descends, the protruding tip of the stopper is pushed by the slanted inner surface of the female mold and moved toward the center of the male mold. It is characterized by
【０００７】請求項３は，請求項１のテーパ角管の製造
装置において，雄型の中心部にあけた垂直な縦穴内を昇
降可能で，かつ傾斜面を持つ棒状のカムを垂直に設ける
とともに，前記ストッパは，雌型が上昇位置にある時
は，前記ばねにより雄型の中心へ向けて付勢されて全体
が雄型内に没入し，雌型が下降する際に，雌型の上下動
に伴って前記縦穴内を上下動する前記カムによりストッ
パの後端部が水平方向外方に駆動されて，雄型の外周面
から突出するようにされたことを特徴とする。According to a third aspect of the present invention, in the tapered square tube manufacturing apparatus according to the first aspect, a rod-shaped cam having a slanting surface is provided vertically so that it can be lifted and lowered in a vertical vertical hole formed in the center of the male die. , The stopper is urged toward the center of the male mold by the spring when the female mold is in the raised position, and the entire stopper is immersed in the male mold, and when the female mold descends, the stopper moves up and down. The rear end portion of the stopper is driven outward in the horizontal direction by the cam that moves up and down in the vertical hole in accordance with the movement, so as to project from the outer peripheral surface of the male die.
【０００８】請求項４は，請求項１の製造装置を用いて
テーパ角管を製造するテーパ角管の製造方法であって，
素材角管の絞り成形を複数回のプレス動作に分けて行う
とともに，各プレス動作において，雌型の上昇時に前記
ストッパによりテーパ角管を剥離された雌型の内面に潤
滑油を塗布することを特徴とする。According to a fourth aspect of the present invention, there is provided a method for manufacturing a tapered rectangular tube, which comprises manufacturing the tapered rectangular tube using the manufacturing apparatus according to claim 1.
The drawing of the raw material square tube is divided into a plurality of pressing operations, and in each pressing operation, the lubricating oil is applied to the inner surface of the female die from which the tapered rectangular tube is peeled by the stopper when the female die is raised. Characterize.
【０００９】[0009]
【作用】上記構成のテーパ角管製造装置において，雄型
に素材角管を被せ雌型を下降させると，雄型と雌型とで
素材角管がテーパ角管に絞り成形される。通常，絞り成
形されたテーパ角管は雌型の内面に圧着してしまう。し
たがって，雌型が上昇する際，テーパ角管は雌型ととも
に上昇しようとするが，雄型の外周面から突出したスト
ッパで上昇を止められるので，雌型の内面から剥離し，
雄型上に落下する。こうして，テーパ角管がストッパに
より自動的にノックアウトされる。In the taper rectangular tube manufacturing apparatus having the above-described structure, when the material rectangular tube is covered on the male mold and the female mold is lowered, the material rectangular pipe is drawn into the tapered rectangular pipe by the male mold and the female mold. Normally, a draw-formed tapered rectangular tube is crimped to the inner surface of a female mold. Therefore, when the female die rises, the tapered rectangular tube tries to rise together with the female die, but since the rise is stopped by the stopper protruding from the outer peripheral surface of the male die, it peels from the inner surface of the female die,
It falls on the male mold. In this way, the tapered rectangular tube is automatically knocked out by the stopper.
【００１０】請求項２のテーパ角管の製造装置におい
て，ストッパは通常，ばねで付勢されて雄型の外周面よ
り外に一定量突出している。雌型が下降する際，雌型の
傾斜した内面がストッパに接触し，ストッパをばねの反
力に抗して雄型の中心方向に移動させる。したがって，
ストッパが雌型の動作に対して邪魔になることはない。
雌型が上昇する際は，ストッパがテーパ角管に当たって
その上昇を止めるので，テーパ角管のノックアウトが自
動的に行われる。In the taper rectangular tube manufacturing apparatus of the second aspect, the stopper is normally biased by a spring and protrudes to a certain extent outside the outer peripheral surface of the male die. When the female die descends, the slanted inner surface of the female die contacts the stopper and moves the stopper toward the center of the male die against the reaction force of the spring. Therefore,
The stopper does not interfere with the movement of the female mold.
When the female die rises, the stopper hits the taper square tube and stops the rise, so that the knockout of the taper square tube is automatically performed.
【００１１】請求項３のテーパ角管の製造装置におい
て，ストッパは通常，ばねで雄型の中心方向に付勢され
てほぼ全体が雄型内に没入している。雌型が下降して素
材角管を絞り成形するが，雌型が下降する際，雌型の下
降に伴って棒状のカムが雄型の中心部の縦穴内で下降
し，カムの傾斜面がストッパの後端部に接触して，スト
ッパをばねの反力に抗して水平方向外方に駆動し，スト
ッパの一部を雄型の外周面から突出させる。雌型が上昇
する際，突出したストッパがテーパ角管に当たってその
上昇を止めるので，ノックアウトが自動的に行われる。
雌型がさらに上昇すると，ストッパに対するカムの拘束
がなくなり，ストッパはばねの反力により雄型内に没入
する。In the tapered rectangular tube manufacturing apparatus of the third aspect, the stopper is normally biased by a spring toward the center of the male die so that the stopper is substantially entirely immersed in the male die. The female die descends and draws the material square tube. When the female die descends, the rod-shaped cam descends in the vertical hole at the center of the male die as the female die descends, and the inclined surface of the cam By contacting the rear end of the stopper, the stopper is driven horizontally outward against the reaction force of the spring, and a part of the stopper is projected from the outer peripheral surface of the male mold. When the female mold rises, the protruding stopper hits the tapered rectangular tube and stops the rise, so knockout is automatically performed.
When the female die rises further, the cam is no longer restrained by the stopper, and the stopper retracts into the male die due to the reaction force of the spring.
【００１２】請求項４の製造方法において，素材角管は
複数回のプレス動作により最終的な形状のテーパ角管に
絞り成形される。複数回に分けてプレスするので最大加
圧力は当然小さく済む。各プレス動作において，テーパ
角管（最終的な形状となっていない中間段階のものも含
む）は雌型の内面に圧着してしまうが，雌型が上昇する
際に前述の通りストッパに当たってノックアウトされ
る。ノックアウトされたテーパ角管は，雄型上に落下す
るので，そのままで次のプレス動作が可能である。各プ
レス動作の前に雌型の内面に潤滑油が塗布されるので，
摩擦力に伴う加圧力の増大が避けられ，絞り成形に必要
な最大加圧力がさらに小さく済む。In the manufacturing method of the fourth aspect, the raw material rectangular tube is formed into a tapered rectangular tube having a final shape by a plurality of pressing operations. Since the pressing is performed in multiple times, the maximum pressing force is naturally small. In each press operation, the tapered square tube (including the intermediate stage that is not in the final shape) is crimped to the inner surface of the female die, but when the female die rises, it hits the stopper and is knocked out as described above. It The knocked-out tapered rectangular tube drops onto the male mold, so the next pressing operation can be performed as it is. Since lubricating oil is applied to the inner surface of the female mold before each pressing operation,
It is possible to avoid an increase in the pressing force due to the frictional force, and the maximum pressing force required for drawing can be further reduced.
【００１３】[0013]
【実施例】以下，本発明の実施例を図面を参照して説明
する。図１〜図１２に本発明の第１実施例（特に請求項
２の実施例）を示す。図１は第１実施例のテーパ角管製
造装置２の正面断面図，図２は同テーパ角管製造装置２
の平面図である。このテーパ角管製造装置２は，例えば
油圧式のプレス機のラム３に雌型ホルダ４を介して固定
された雌型５と，プレス機の受台６に雄型ホルダ７を介
して固定された雄型８とからなる。図において，符号１
ａは素材角管を示す。Embodiments of the present invention will be described below with reference to the drawings. 1 to 12 show a first embodiment of the present invention (in particular, an embodiment of claim 2). 1 is a front sectional view of a tapered rectangular tube manufacturing apparatus 2 of the first embodiment, and FIG. 2 is a tapered rectangular tube manufacturing apparatus 2 of the same.
FIG. This taper tube manufacturing apparatus 2 is fixed to a ram 3 of a hydraulic press machine via a female holder 4 and a cradle 6 of the press machine via a male holder 7, for example. It consists of a male type 8. In the figure, reference numeral 1
“A” indicates a material rectangular tube.
【００１４】前記雌型５は，製造しようとする図２４に
示したテーパ角管１の外面形状にほぼ等しい截頭四角錐
状の内面５ａを持つ。前記雄型８は，製造しようとする
テーパ角管１の内面形状にほぼ等しい截頭四角錐状の外
周面を持つ。この雄型８の詳細を図８〜図１２に示す。
図８は雄型８の正面図，図９は同平面図，図１０は図９
におけるＡ−Ａ断面図，図１１は図９におけるＢ−Ｂ断
面図，図１２は後述するストッパ９が雄型８内に没入し
た状態の平面図である。この雄型８の上部には，図９に
示すように上面から見て四角形の雄型８の対角線方向に
それぞれ摺動可能な対向する一対のストッパ９を備えて
いる。このストッパ９は，上面から見て概略三角形状を
なし，その外方の側面は雌型５の内面５ａとほぼ同じ傾
斜で傾斜しており，図１０に示されるように雄型８の上
面とこの雄型８の上面に固定したストッパ押さえ部材１
０との間の空所１１に配置されている。図示例では，ス
トッパ押さえ部材１０側にガイド溝１０ｂ，ストッパ９
側に前記ガイド溝１０ｂに嵌合するガイドキー１２を設
けて，ストッパ９が雄型８の対角線方向に摺動するよう
にしている。なお，ストッパ押さえ部材１０の中心の軸
部１０ａは，ストッパ押さえ部材１０と雄型８との間隔
を規定しつつ両者８，１０を連結する。その連結構造
は，ボルトによる構造その他任意であるが，その連結構
造の図示は省略した。ただし，ノックアウトの際に上向
きの大きな荷重が加わるので，そのノックアウト荷重に
耐える強度を持つ構造とする。The female die 5 has a truncated quadrangular pyramid-shaped inner surface 5a which is substantially the same as the outer surface shape of the tapered rectangular tube 1 shown in FIG. The male mold 8 has a truncated quadrangular pyramid-shaped outer peripheral surface substantially equal to the inner surface shape of the tapered rectangular tube 1 to be manufactured. Details of this male mold 8 are shown in FIGS.
8 is a front view of the male die 8, FIG. 9 is the same plan view, and FIG. 10 is FIG.
11 is a cross-sectional view taken along line AA in FIG. 11, FIG. 11 is a cross-sectional view taken along line BB in FIG. 9, and FIG. 12 is a plan view showing a state in which a stopper 9 described later is immersed in the male mold 8. As shown in FIG. 9, a pair of stoppers 9 facing each other that are slidable in a diagonal direction of the square male die 8 when viewed from the upper surface are provided on the upper portion of the male die 8. The stopper 9 has a substantially triangular shape when viewed from the upper surface, and the outer side surface of the stopper 9 is inclined at substantially the same inclination as the inner surface 5a of the female die 5, and as shown in FIG. Stopper pressing member 1 fixed to the upper surface of this male mold 8
It is located in a space 11 between 0 and the space. In the illustrated example, the guide groove 10b and the stopper 9 are provided on the stopper pressing member 10 side.
A guide key 12 fitted into the guide groove 10b is provided on the side so that the stopper 9 can slide in the diagonal direction of the male die 8. The central shaft portion 10a of the stopper pressing member 10 connects the stopper pressing member 10 and the male die 8 while defining the distance between them. The connecting structure may be any structure such as a bolt structure, but the connecting structure is not shown. However, since a large upward load is applied during knockout, the structure should be strong enough to withstand the knockout load.
【００１５】各ストッパ９にはそれぞれ対向してばね装
着穴９ａを２箇所にあけ，対向するばね装着穴９ａに両
端がそれぞれ挿入されるばね１３を配置している。ま
た，ストッパ９の上面にストッパ９の外方への突出限を
規定する突起９ｂを設け，ストッパ押さえ部材１０の下
面に前記突起９ｂが嵌入する溝１０ｃを設けている。こ
の溝１０ｃは，図１１に示すようにストッパ押さえ部材
１０の上面まで開口しており，前記突起９ｂに垂直に固
定したレバー１４がストッパ押さえ部材１０の上に突出
するようにしている。このレバー１４を手で操作して，
ストッパ９を雄型８の中心方向に移動させると，ストッ
パ９の全体を雄型８内に没入させることができる。図８
〜１１はストッパ９が最も外方に突出した状態であり，
ストッパ９の全体が雄型８内に没入した状態を図１２に
示す。Spring stopper holes 9a are formed in the stoppers 9 so as to oppose each other at two positions, and springs 13 are inserted into the opposed spring stopper holes 9a, both ends of which are respectively inserted. Further, a projection 9b is provided on the upper surface of the stopper 9 to define the outward projection limit of the stopper 9, and a groove 10c into which the projection 9b is fitted is provided on the lower surface of the stopper pressing member 10. As shown in FIG. 11, the groove 10c is opened to the upper surface of the stopper pressing member 10 so that the lever 14 fixed vertically to the protrusion 9b projects above the stopper pressing member 10. Operate this lever 14 by hand,
By moving the stopper 9 toward the center of the male die 8, the entire stopper 9 can be immersed in the male die 8. Figure 8
-11 is the state where the stopper 9 is projected most outward,
FIG. 12 shows a state where the entire stopper 9 is immersed in the male mold 8.
【００１６】次に，上述のテーパ角管の製造装置２によ
るテーパ角管の製造手順について図１〜図７を参照して
説明する。この実施例では，３回のプレス動作で最終的
な形状の絞り成形を行う。図１に示すように，素材角管
１ａを雄型８に被せる。この場合，ストッパ９の側面に
テーパがついているので，素材角管１ａがストッパ９の
側面の上面側部分に若干でも入ると，素材角管１ａの内
面で押されてストッパ９が内側に移動し，素材角管１ａ
が雄型８を通過する。なお，ストッパ９の突出量はそれ
ほど大きく取ることを要しないので，ストッパ９を内側
に移動させないで素材角管１ａを通過させられる場合も
考えられる。また，必要であれば手で図１１に示したレ
バー１４を操作してストッパ９を内側に移動させ，素材
角管１ａに干渉しないようにすることもできる。Next, a procedure for manufacturing a tapered rectangular tube by the above-described tapered rectangular tube manufacturing apparatus 2 will be described with reference to FIGS. In this embodiment, the final shape drawing is performed by three pressing operations. As shown in FIG. 1, the material square tube 1 a is put on the male mold 8. In this case, since the side surface of the stopper 9 has a taper, even if the material square tube 1a slightly enters the upper surface side portion of the stopper 9, it is pushed by the inner surface of the material square tube 1a and the stopper 9 moves inward. , Material square tube 1a
Passes through the male mold 8. Since the amount of protrusion of the stopper 9 does not need to be so large, it may be possible to pass the material square tube 1a without moving the stopper 9 inward. If necessary, the lever 14 shown in FIG. 11 may be manually operated to move the stopper 9 inward so that the stopper 9 does not interfere with the material square tube 1a.
【００１７】次いで，プレス機を作動させ，図３に示す
ようにラム３および雌型ホルダ４とともに雌型５を下降
させる。この第１回目のプレス動作において雌型５が下
降する際，雄型８の外周面から突出したストッパ９は，
雌型５の傾斜した内面５ａに接触して水平方向の分力に
より押され，ばね１３の反力に抗して後退する（雄型８
内部側に若干引っ込む）。したがって，ストッパ９が雌
型５の動作に対して邪魔になることはない。この第１回
目のプレス動作では，図示のようにラム３のストローク
を中間位置に止めて，素材角管１ａの絞り成形を中間段
階まで行い，中間段階のテーパ角管１’を得る。Then, the press machine is operated to lower the female die 5 together with the ram 3 and the female die holder 4 as shown in FIG. When the female die 5 descends in the first pressing operation, the stopper 9 protruding from the outer peripheral surface of the male die 8 is
It contacts the inclined inner surface 5a of the female die 5 and is pushed by the component force in the horizontal direction, and moves backward against the reaction force of the spring 13 (male die 8).
Retract slightly to the inside). Therefore, the stopper 9 does not interfere with the operation of the female die 5. In the first pressing operation, the stroke of the ram 3 is stopped at an intermediate position as shown in the drawing, and the raw material rectangular tube 1a is drawn to an intermediate stage to obtain an intermediate stage tapered rectangular tube 1 '.
【００１８】上記のように絞り成形されたテーパ角管
１’は通常，中間段階の絞り成形であっても雌型５の内
面５ａに圧着してしまう。したがって，雌型５が上昇す
る際，テーパ角管１’は雌型５とともに上昇しようとす
るが，ばね１３の反力で常時外方に付勢されているスト
ッパ９は，先端が雌型５の内面に接触する状態に突出し
ているので，図４に示すようにテーパ角管１’がこのス
トッパ９に当たって上昇を止められ，雌型５の内面５ａ
から剥離し，図５に示すように雄型８上に落下する。こ
のように，ノックアウトのための特別な工程を必要とせ
ず，絞り成形のプレス動作の中で，テーパ角管１’がス
トッパ９により自動的にノックアウトされる。The tapered rectangular tube 1'formed by drawing as described above is normally pressed against the inner surface 5a of the female die 5 even in the intermediate drawing. Therefore, when the female die 5 rises, the tapered rectangular tube 1 ′ tries to rise together with the female die 5, but the stopper 9 that is constantly urged outward by the reaction force of the spring 13 has a tip of the female die 5. Since it projects so as to come into contact with the inner surface of the inner surface of the female die 5, the tapered rectangular tube 1 ′ abuts against the stopper 9 and stops rising, as shown in FIG.
It is peeled off and dropped onto the male mold 8 as shown in FIG. In this way, the tapered rectangular tube 1 ′ is automatically knocked out by the stopper 9 during the pressing operation of the drawing without requiring a special step for knocking out.
【００１９】図５の状態で，雌型５の内面５ａに潤滑油
を塗布する。この潤滑油の塗布は，作業者が例えば潤滑
油入りのスプレーを手で操作して吹き付ける方法等でも
よいが，雌型ホルダ４に自動噴霧装置を設け，この自動
噴霧装置により潤滑油を自動的に噴霧するようにするこ
ともできる。In the state shown in FIG. 5, lubricating oil is applied to the inner surface 5a of the female die 5. The application of this lubricating oil may be performed by a worker manually spraying a lubricant-containing spray, for example, but an automatic spraying device is provided on the female holder 4, and the lubricating oil is automatically sprayed by this automatic spraying device. It can also be sprayed on.
【００２０】図示は省略したが，第２回目のプレス動作
により雌型５を図３の位置よりさらに下方まで下降さ
せ，さらに下方まで絞り成形する。この工程でも，雌型
５が上昇する際に，テーパ角管１’が同様にストッパ９
に当たり雌型５からノックアウトされる。また，上昇し
た雌型５の内面５ａに潤滑油を塗布する。Although not shown, the female die 5 is lowered to a position lower than the position shown in FIG. 3 by the second pressing operation, and further drawn downward. Also in this step, when the female die 5 is raised, the tapered rectangular tube 1'is also similarly stopped by the stopper 9
It is knocked out from female mold 5 upon hitting. Further, lubricating oil is applied to the inner surface 5a of the raised female die 5.
【００２１】次いで，第３回目のプレス動作により，図
６に示すように最終的な絞り成形を行う。これにより，
最終形状のテーパ角管１が得られる。この時もテーパ角
管１が雌型５の内面５ａに圧着するが，雌型５が上昇す
る際，テーパ角管１は上記と同様にストッパ９に当たり
雌型５からノックアウトされる。ノックアウトの状態の
図示は省略した。次いで，図７のようにテーパ角管１を
雄型８から取り出す。その際，図１１等に示したレバー
１４を操作してストッパ９の全体を雄型８内に没入させ
て，雄型８を通過させる。Next, by the third pressing operation, final drawing is performed as shown in FIG. By this,
The final shape of the tapered rectangular tube 1 is obtained. At this time as well, the taper square tube 1 is crimped to the inner surface 5a of the female die 5, but when the female die 5 rises, the taper square tube 1 hits the stopper 9 and is knocked out from the female die 5 in the same manner as described above. Illustration of the knockout state is omitted. Then, the tapered rectangular tube 1 is taken out from the male mold 8 as shown in FIG. At that time, the lever 14 shown in FIG. 11 and the like is operated to immerse the entire stopper 9 into the male die 8 and allow the male die 8 to pass therethrough.
【００２２】なお，サイズが板厚１２ｍｍ×縦２５０ｍ
ｍ×横２５０ｍｍの素材角管１ａより，小径側サイズが
縦２００ｍｍ×横２００ｍｍであるテーパ角管を得る絞
り成形について実験を行ったが，従来のように１回のプ
レス動作で最終的な絞り成形を行った場合，約８００ト
ンの加圧力を必要としたのに対して，上述した３回のプ
レス動作による場合は，中間段階の絞り成形で約３００
トン〜３５０トン，最終的な絞り成形で約５００トンの
加圧力であった。このように，プレス動作を３回に分け
るとともに，各プレス動作の前に潤滑油を塗布すること
で，必要な最大加圧力を大幅に低下させることができ
た。このように，最大加圧力を低く抑えるためにはプレ
ス動作を複数回に分けること，および，プレス動作前に
潤滑油を塗布することがきわめて有効であるが，このよ
うなプレス作業を実際の生産で行うためには，材料を容
易かつ能率的にノックアウトできることが必須であり，
それを満足させる本発明のノックアウト機構は，上記の
ごとき最大加圧力を低下させるプレス作業を実際の生産
に適用する上で極めて有効である。ただし，本発明のテ
ーパ角管製造装置は，プレス動作の回数は上述の説明の
ように３回に限らず，２回，あるいは４回以上でもよい
し，さらには，１回のプレス動作で最終的な形状を得る
場合にも適用できる。The size is 12 mm thick and 250 m long.
An experiment was conducted on the draw forming to obtain a taper square tube with a small diameter side size of 200 mm length × 200 mm width from a material square tube 1a of m × 250 mm width. In the case of molding, a pressing force of about 800 tons was required, whereas in the case of the above-mentioned three pressing operations, it was about 300 in drawing in the intermediate stage.
Tons to 350 tons, and a final drawing pressure was about 500 tons. Thus, by dividing the pressing operation into three times and applying the lubricating oil before each pressing operation, the required maximum pressing force could be significantly reduced. Thus, in order to keep the maximum pressure low, it is extremely effective to divide the press operation into multiple times and to apply lubricating oil before the press operation. In order to do so, it is essential that the material can be knocked out easily and efficiently.
The knockout mechanism of the present invention that satisfies the above is extremely effective in applying the press work for reducing the maximum pressing force as described above to actual production. However, in the tapered rectangular tube manufacturing apparatus of the present invention, the number of pressing operations is not limited to three as described above, but may be two, four or more times, and further, one pressing operation is the final step. It can also be applied to obtain a specific shape.
【００２３】次に，第２実施例（特に請求項３の実施
例）を図１３〜図２３を参照して説明する。図１３はこ
の第２実施例のテーパ角管製造装置２２の断面図，図１
４は図１３のストッパ押さえ部材３０を除いた状態の平
面図（図１３のＣ−Ｃ矢視図）である。両図において，
符号２４は雌型ホルダ，符号２５は雌型，符号２７は雄
型ホルダ，符号２８は雄型，符号２９はストッパを示
す。プレス機のラムおよび，受台は図示を省略した。こ
の第２実施例のテーパ角管製造装置２２は，雄型２８側
に出没可能に設けたストッパ２９により，雌型２５の内
面２５ａに圧着した中間段階または最終的な形状のテー
パ角管をノックアウトする点で前述の第１実施例と共通
であるが，この第２実施例のストッパ２９は，通常は雄
型２８内に没入しており，プレス動作に伴って雄型２８
の外周面から突出し，ノックアウト可能な状態となる。Next, the second embodiment (in particular, the embodiment of claim 3) will be described with reference to FIGS. FIG. 13 is a sectional view of the taper square tube manufacturing apparatus 22 of the second embodiment, and FIG.
4 is a plan view (a view taken along the line CC in FIG. 13) in a state where the stopper pressing member 30 in FIG. 13 is removed. In both figures,
Reference numeral 24 indicates a female holder, reference numeral 25 indicates a female holder, reference numeral 27 indicates a male holder, reference numeral 28 indicates a male holder, and reference numeral 29 indicates a stopper. Illustration of the ram and pedestal of the press machine is omitted. The taper square tube manufacturing apparatus 22 of the second embodiment knocks out a taper square tube in an intermediate stage or in a final shape, which is crimped to the inner surface 25a of the female die 25, by a stopper 29 provided so as to be retractable on the male die 28 side. However, the stopper 29 of the second embodiment is normally recessed in the male die 28, and the stopper 29 of the second embodiment is depressed by the pressing operation.
It protrudes from the outer peripheral surface and becomes ready for knockout.
【００２４】以下，このテーパ角管製造装置２２を詳細
に説明すると，雄型２８の中心部に四角形の縦穴２８ａ
を設け，この縦穴２８ａに嵌入可能な棒状のカム４０を
雌型ホルダ２４に垂直に固定している。このカム４０
は，雌型ホルダ２４に固定される四角形断面部４０ａに
連接して下方に広がる四角錐状のカム本体部４０ｂを有
し，このカム本体部４０ｂの下端に下方にすぼまる四角
錐状のガイド部４０ｃを備えた形状である。このカム４
０の最大径の部分は縦穴２８ａの内壁にほぼ接触して嵌
合する。The taper square tube manufacturing device 22 will be described in detail below. A rectangular vertical hole 28a is formed in the center of the male mold 28.
The rod-shaped cam 40 that can be fitted into the vertical hole 28a is vertically fixed to the female holder 24. This cam 40
Has a quadrangular pyramid-shaped cam body 40b which is connected to a quadrangular cross-section 40a fixed to the female holder 24 and spreads downward. It has a shape including a guide portion 40c. This cam 4
The portion having the maximum diameter of 0 almost fits into the inner wall of the vertical hole 28a and is fitted therein.
【００２５】雄型２８に設けるストッパ２９は，図１４
にも示すように，上面から見て４つの各辺毎に設けられ
ており，雄型２８に設けた対辺方向の溝２８ｂに嵌合し
て対辺方向に摺動可能である。また，ストッパ２９の内
部に溝２９ａが設けられ，この溝２９ａに雄型２８に固
定されたブロック４１が嵌合している。このブロック４
１は，ストッパ２９の雄型中心方向への移動限を規制す
る。ストッパ２９を雄型２８の中心方向に付勢するばね
３３は前記ブロック４１に一端が接触するように溝２８
ｂ内に配置されている。ストッパ２９を押さえるストッ
パ押さえ部材３０は，雄型２８の上面にあけたねじ穴２
８ｃにねじ込んだ図示略のボルトで雄型２８の上面に固
定される。前記カム４０の四角錐状のカム本体部４０ｂ
の傾斜角度は，雌型２５の内面２５ａの傾斜角度と同一
であり，これにより，雌型２５が昇降する際にカム４０
は，カム本体部４０ｂがストッパ２９に接触している間
は常に，ストッパ２９の先端面と雌型２５の内面との間
隙を一定に保つことができる。The stopper 29 provided on the male die 28 is shown in FIG.
Also, as shown in FIG. 5, each of the four sides is provided when viewed from the upper surface, and is fitted in a groove 28b in the opposite side direction provided in the male die 28 so as to be slidable in the opposite side direction. A groove 29a is provided inside the stopper 29, and a block 41 fixed to the male die 28 is fitted in the groove 29a. This block 4
1 regulates the limit of movement of the stopper 29 toward the center of the male mold. A spring 33 for urging the stopper 29 toward the center of the male die 28 has a groove 28 so that one end of the spring 33 contacts the block 41.
It is located in b. The stopper pressing member 30 for pressing the stopper 29 is a screw hole 2 formed on the upper surface of the male mold 28.
It is fixed to the upper surface of the male mold 28 with a bolt (not shown) screwed into 8c. A quadrangular pyramid-shaped cam body 40b of the cam 40
Is the same as the inclination angle of the inner surface 25a of the female die 25, which allows the cam 40 to move when the female die 25 moves up and down.
The gap between the tip surface of the stopper 29 and the inner surface of the female die 25 can be kept constant while the cam body 40b is in contact with the stopper 29.
【００２６】次に，上記のテーパ角管製造装置２２によ
るテーパ角管の製造手順について図１５〜図２２を参照
して説明する。この実施例では，第１の実施例と同様
に，３回のプレス動作により最終的な形状のテーパ角管
１に絞り成形し，また，各プレス動作の前に潤滑油を塗
布する。雄型２８に素材角管１ａを被せた後，第１回目
のプレス動作を行う。図１５は第１回目のプレス動作に
おいて，カム４０が雌型２５と一体に下降し，その際カ
ム４０の先端のガイド部４０ｃがストッパ２９の後端
（雄型中心側の端部）に接触し始めた時点の態様を示
す。また，ほぼ同時に素材角管１ａの絞り成形が開始さ
れている。図１６に示すように，雌型２５がさらに下降
して絞り成形が進むが，ストッパ２９はカム４０のガイ
ド部４０ｃで水平方向に押され，雄型２８の外周面から
突出する。Next, the procedure for manufacturing the tapered rectangular tube by the tapered rectangular tube manufacturing apparatus 22 will be described with reference to FIGS. In this embodiment, similarly to the first embodiment, the tapered rectangular tube 1 having the final shape is drawn by three pressing operations, and lubricating oil is applied before each pressing operation. After covering the material square tube 1a on the male mold 28, the first pressing operation is performed. FIG. 15 shows that, in the first pressing operation, the cam 40 descends integrally with the female die 25, and at that time, the guide portion 40c at the tip of the cam 40 contacts the rear end of the stopper 29 (end portion on the male die center side). The mode at the time of starting is shown. Further, the drawing of the raw material rectangular tube 1a is started almost at the same time. As shown in FIG. 16, although the female die 25 is further lowered to perform drawing, the stopper 29 is pushed horizontally by the guide portion 40c of the cam 40 and protrudes from the outer peripheral surface of the male die 28.
【００２７】次いで，図１７に示すように，第１回目の
プレス動作による中間段階の絞り成形が終了する。この
時，ストッパ２９はカム４０のカム本体部４０の傾斜面
により押されて雌型２５の内面２５ａに近接する。スト
ッパ２９と雌型２５の内面２５ａとの間隙は，ストッパ
２９がカム本体部４０ｃに接触している状態では常に，
図１７に示される間隙と同じである。次いで，雌型２５
が上昇する。その際，中間段階のテーパ角管１’が雌型
２５の内面２５ａに圧着して雌型２５とともに上昇する
が，図１８に示すように，ストッパ２９がテーパ角管
１’に当たって，テーパ角管１’がノックアウトされ
る。図１９は，テーパ角管１’がノックアウトされた状
態を示す。Then, as shown in FIG. 17, the intermediate stage draw forming by the first pressing operation is completed. At this time, the stopper 29 is pushed by the inclined surface of the cam body 40 of the cam 40 and comes close to the inner surface 25a of the female die 25. The gap between the stopper 29 and the inner surface 25a of the female die 25 is always constant when the stopper 29 is in contact with the cam body 40c.
It is the same as the gap shown in FIG. Next, female mold 25
Rises. At this time, the taper square tube 1'in the middle stage is pressed against the inner surface 25a of the female die 25 and ascends together with the female die 25. However, as shown in FIG. 1'is knocked out. FIG. 19 shows a state where the tapered rectangular tube 1'is knocked out.
【００２８】次いで，第２回目のプレス動作によりさら
に深い絞り成形を行う。この第２回目のプレス動作の説
明は省略する。Then, deeper drawing is performed by the second pressing operation. The description of the second pressing operation is omitted.
【００２９】次いで，第３回目のプレス動作により，図
２０に示すように，最終的な絞り成形を行う。これによ
り，最終的な形状のテーパ角管１が得られる。次いで，
雌型２５が上昇するが，その際も，図２１に示すよう
に，テーパ角管１がストッパ１９に当たって，雌型２５
の内面から剥離し，図２２に示すように，テーパ角管１
がノックアウトされる。Next, by the third pressing operation, as shown in FIG. 20, final drawing is performed. As a result, the tapered rectangular tube 1 having the final shape is obtained. Then,
The female die 25 rises, but at this time, as shown in FIG. 21, the tapered rectangular tube 1 hits the stopper 19 and the female die 25
As shown in Fig. 22, the taper square tube 1 is separated from the inner surface of the
Is knocked out.
【００３０】なお，上述のテーパ角管製造装置２２にお
けるカム４０は，図２３に示すように，雄型２８側に設
けることもできる。すなわち，図２３に示した実施例の
カム４０’は，機能上の形状としては図１３〜図２２で
述べたカム４０と基本的に同じであるが，このカム４
０’の下端に抜け止め用の鍔部４０’ｅを設けるととも
に，このカム４０’を上方に付勢するばね５１を雄型２
８の縦穴２８ａ内に設ける。この場合，雌型ホルダ２４
にはカム４０’の上端面に当たって，カム４０’を下方
に押し下げる単なる軸５２を固定する。これにより，上
述の場合と同様に，雌型２５の昇降の際にカム４０’で
ストッパ２９を駆動して，テーパ角管のノックアウトを
行うことができる。The cam 40 in the taper tube manufacturing apparatus 22 described above may be provided on the male die 28 side as shown in FIG. That is, the cam 40 'of the embodiment shown in FIG. 23 is basically the same as the cam 40 described in FIGS.
At the lower end of 0 ', a collar portion 40'e for preventing slipping out is provided, and a spring 51 for urging the cam 40' upward is attached to the male die 2.
It is provided in eight vertical holes 28a. In this case, the female holder 24
A simple shaft 52 is fixed to the upper end of the cam 40 'to push the cam 40' downward. As a result, as in the case described above, when the female die 25 is moved up and down, the cam 29 can drive the stopper 29 to knock out the tapered rectangular tube.
【００３１】なお，本発明においてストッパを水平方向
に駆動して雄型の外周面から出没させる手段について
は，上記の各実施例の構造に限定されない。要するに，
雌型の上下動に伴う分力としての水平方向の駆動力とば
ねによる前記と反対方向の駆動力とによりストッパを水
平方向前後に移動可能であればよい。In the present invention, the means for driving the stopper in the horizontal direction so as to project and retract from the outer peripheral surface of the male mold is not limited to the structure of each of the above embodiments. in short,
It suffices that the stopper can be moved back and forth in the horizontal direction by the horizontal driving force as a component force associated with the vertical movement of the female die and the driving force in the opposite direction by the spring.
【００３２】また，上記の実施例では，図２４に示した
ように四面が同じ傾斜のテーパ角管１を絞り成形する場
合について述べたが，二面が傾斜し他の二面が垂直な二
面絞りのテーパ角管，あるいは三面が傾斜し他の一面が
垂直な三面絞りのテーパ角管にも本発明を適用すること
ができる。Further, in the above-mentioned embodiment, the case where the tapered rectangular tube 1 having the same inclination on the four sides as shown in FIG. 24 is described, but the two sides are inclined and the other two sides are vertical. The present invention can also be applied to a tapered rectangular tube of a face stop or a tapered rectangular tube of a three-sided stop in which three surfaces are inclined and the other surface is vertical.
【００３３】[0033]
【発明の効果】本発明によれば，雄型に出没可能なスト
ッパを設けるという簡単な構成により，絞り成形後のテ
ーパ角管のノックアウトを容易に行うことができるよう
になった。また，プレス機自体には別途ノックアウト用
の油圧シリンダを設ける等の特別な改造をする必要がな
いので，既設のプレス機に本発明を容易に適用すること
ができる。そして，このノックアウトは，プレス動作の
中で自動的に行われるので，ノックアウトのための余分
な工程を必要とせずきわめて能率的である。According to the present invention, it is possible to easily knock out a tapered rectangular tube after drawing by a simple structure in which a stopper capable of projecting and retracting is provided in a male mold. In addition, since the press machine itself does not need to be specially modified such as providing a knockout hydraulic cylinder, the present invention can be easily applied to an existing press machine. Since this knockout is automatically performed during the press operation, it is extremely efficient without requiring an extra step for knockout.
【００３４】請求項４の製造方法によれば，絞り成形を
複数回のプレス動作により行うと同時に，各プレス動作
の前に雌型の内面に潤滑油を塗布するので，プレス機に
要求される最大加圧力を大幅に小さくすることができ
る。According to the manufacturing method of the fourth aspect, the drawing is performed by a plurality of pressing operations, and at the same time, the lubricating oil is applied to the inner surface of the female die before each pressing operation. The maximum applied pressure can be greatly reduced.
【図１】本発明のテーパ角管製造装置の第１の実施例
（請求項２の実施例）を示す正面断面図であり，テーパ
角管を製造する工程におけるプレス動作開始前の態様を
示す。FIG. 1 is a front cross-sectional view showing a first embodiment (embodiment of claim 2) of a tapered rectangular tube manufacturing apparatus of the present invention, showing a mode before starting a pressing operation in a step of manufacturing a tapered rectangular tube. .
【図２】上記テーパ角管製造装置の平面断面図である。FIG. 2 is a plan sectional view of the tapered rectangular tube manufacturing apparatus.
【図３】上記テーパ角管製造装置の正面断面図で，図１
に続く工程における態様を示す。FIG. 3 is a front cross-sectional view of the taper square tube manufacturing apparatus shown in FIG.
The aspect in the process of following is shown.
【図４】上記テーパ角管製造装置の正面断面図で，図３
に続く工程における態様を示す。FIG. 4 is a front cross-sectional view of the taper rectangular tube manufacturing apparatus shown in FIG.
The aspect in the process of following is shown.
【図５】上記テーパ角管製造装置の正面断面図で，図４
に続く工程における態様を示す。5 is a front cross-sectional view of the taper rectangular tube manufacturing apparatus shown in FIG.
The aspect in the process of following is shown.
【図６】上記テーパ角管製造装置の正面断面図で，図５
に続く工程における態様を示す。6 is a front cross-sectional view of the taper rectangular tube manufacturing apparatus shown in FIG.
The aspect in the process of following is shown.
【図７】上記テーパ角管製造装置の正面断面図で，図６
に続く工程における態様を示す。FIG. 7 is a front cross-sectional view of the above tapered rectangular tube manufacturing apparatus, and FIG.
The aspect in the process of following is shown.
【図８】図１における雄型の拡大正面図である。FIG. 8 is an enlarged front view of the male die in FIG.
【図９】図８の平面図である。9 is a plan view of FIG. 8. FIG.
【図１０】図９における要部のＡ−Ａ断面図である。10 is a cross-sectional view taken along the line AA of the main part in FIG.
【図１１】図９における要部のＢ−Ｂ断面図である。11 is a cross-sectional view taken along the line BB of the main part in FIG.
【図１２】図９においてストッパの全体を雄型内に没入
させた状態の平面図である。FIG. 12 is a plan view showing a state where the entire stopper is immersed in the male mold in FIG.
【図１３】本発明のテーパ角管製造装置の第２実施例
（請求項３の実施例）を示す断面図である。FIG. 13 is a sectional view showing a second embodiment (embodiment of claim 3) of the tapered rectangular tube manufacturing apparatus of the invention.
【図１４】図１３においてストッパ押さえ部材を外した
状態の雄型の平面図（図１３のＣ−Ｃ矢視図）である。FIG. 14 is a plan view of the male mold in a state where the stopper pressing member is removed in FIG. 13 (a view taken along the arrow CC in FIG. 13).
【図１５】図１３のテーパ角管製造装置によりテーパ角
管を製造する工程を説明するもので，第１回目のプレス
動作においてカムがストッパに接触し始めた時点の態様
を示す。FIG. 15 is a view for explaining a step of manufacturing a tapered rectangular tube by the tapered rectangular tube manufacturing apparatus of FIG. 13, showing a mode at the time when the cam starts to contact the stopper in the first pressing operation.
【図１６】図１３のテーパ角管製造装置によりテーパ角
管を製造する工程を説明するもので，図１５に続いて絞
り成形が進んだ時点の態様を示す。16 is a view for explaining a step of manufacturing a tapered rectangular tube by the tapered rectangular tube manufacturing apparatus of FIG. 13, and shows a mode at a time point when drawing is advanced following FIG.
【図１７】図１３のテーパ角管製造装置によりテーパ角
管を製造する工程を説明するもので，第１回目または第
２回目のプレス動作による中間段階の絞り成形終了時点
の態様を示す。FIG. 17 is a view for explaining a process of manufacturing a tapered rectangular tube by the tapered rectangular tube manufacturing apparatus of FIG. 13, and shows an aspect at the end of the intermediate stage draw forming by the first or second pressing operation.
【図１８】図１３のテーパ角管製造装置によりテーパ角
管を製造する工程を説明するもので，図１７に示す第１
回目のプレス動作後のノックアウト直前の態様を示す。FIG. 18 is a view for explaining a step of manufacturing a tapered rectangular tube by the tapered rectangular tube manufacturing apparatus of FIG.
The mode just before knockout after the second press operation is shown.
【図１９】図１３のテーパ角管製造装置によりテーパ角
管を製造する工程を説明するもので，図１８に続いてノ
ックアウトが完了した時点の態様を示す。FIG. 19 is a view for explaining a step of manufacturing a tapered rectangular tube by the tapered rectangular tube manufacturing apparatus of FIG. 13, showing a mode at the time when knockout is completed following FIG.
【図２０】図１３のテーパ角管製造装置によりテーパ角
管を製造する工程を説明するもので，第３回目のプレス
動作（最後のプレス動作）による最終的な絞り成形完了
時点の態様を示す。FIG. 20 is a view for explaining a process of manufacturing a tapered rectangular tube by the tapered rectangular tube manufacturing apparatus of FIG. 13, showing a state at the time of final drawing forming completion by the third pressing operation (final pressing operation). .
【図２１】図１３のテーパ角管製造装置によりテーパ角
管を製造する工程を説明するもので，図２０に示す最後
のプレス動作後のノックアウト直前の態様を示す。21 is a view for explaining a step of manufacturing a tapered rectangular tube by the tapered rectangular tube manufacturing apparatus of FIG. 13, and shows a mode immediately before knockout after the final pressing operation shown in FIG. 20.
【図２２】図１３のテーパ角管製造装置によりテーパ角
管を製造する工程を説明するもので，図２１に続いてノ
ックアウトが完了した時点の態様を示す。22 is a diagram for explaining a process of manufacturing a tapered rectangular tube by the tapered rectangular tube manufacturing apparatus of FIG. 13, showing a mode at the time when knockout is completed following FIG. 21.
【図２３】上記第２の実施例のテーパ角管製造装置の変
形例を示す断面図である。FIG. 23 is a sectional view showing a modification of the tapered rectangular tube manufacturing apparatus of the second embodiment.
【図２４】本発明のテーパ角管製造装置で製造しようと
するテーパ角管の一例を示す斜視図である。FIG. 24 is a perspective view showing an example of a tapered rectangular tube to be manufactured by the tapered rectangular tube manufacturing apparatus of the present invention.
１ａ 素材角管 １ テーパ角管 １’ 中間段階のテーパ角管 ２，２２ テーパ角管製造装置 ５，２５ 雌型 ８，２８ 雄型 ２８ａ 縦穴 ９，２９ ストッパ ９ａ ばね装着穴 ９ｂ 突起 １０，３０ ストッパ押さえ部材 １０ａ 軸部 １０ ガイド溝 １０ｃ 溝 １２ ガイドキー １３，３３ ばね ４０，４０’ カム ４０ｂ カム本体部 ４０ｃ ガイド部 ４１ ブロック 1a Material square tube 1 Tapered square tube 1'Intermediate stage tapered square tube 2,22 Tapered square tube manufacturing device 5,25 Female type 8,28 Male type 28a Vertical hole 9,29 Stopper 9a Spring mounting hole 9b Projection 10,30 Stopper Pressing member 10a Shaft part 10 Guide groove 10c Groove 12 Guide key 13,33 Spring 40,40 'Cam 40b Cam body part 40c Guide part 41 Block
Claims (4)
対応する雌型とで絞り成形してテーパ角管を製造するテ
ーパ角管の製造装置であって，前記雄型の上部に，雌型
の上下動に伴う分力としての水平方向の駆動力とばねに
よる前記と反対方向の駆動力とにより水平方向前後に移
動可能なストッパを設けるとともに，このストッパは，
その全体が雄型内に没入可能で，かつ，絞り成形後の雌
型上昇時に雌型の内面に圧着して雌型とともに上昇する
テーパ角管の上端に接触可能にされたことを特徴とする
テーパ角管の製造装置。1. A taper rectangular tube manufacturing apparatus for manufacturing a tapered rectangular tube by drawing a raw material rectangular tube with a truncated square pyramidal male mold and a female mold corresponding thereto, and comprising: The upper part is provided with a stopper that can be moved back and forth in the horizontal direction by a horizontal driving force as a component force due to the vertical movement of the female die and a driving force in the opposite direction by the spring, and this stopper is
It is characterized in that the whole body can be immersed in the male mold, and when the female mold is raised after drawing, it can be pressed against the inner surface of the female mold and contact the upper end of the tapered rectangular tube that rises with the female mold. Tapered tube manufacturing equipment.
時は，前記ばねにより雄型の中心から外方に向けて付勢
されてその一部が雄型の外周面から突出しており，雌型
が下降する際にストッパの突出した先端部が雌型の傾斜
した内面により押されて雄型の中心方向に移動するよう
にされたことを特徴とする請求項１記載のテーパ角管の
製造装置。2. The stopper is biased outward from the center of the male die by the spring when the female die is in the raised position, and a part of the stopper protrudes from the outer peripheral surface of the male die. 2. The tapered rectangular tube according to claim 1, wherein when the female mold is lowered, the protruding tip portion of the stopper is pushed by the inclined inner surface of the female mold to move toward the center of the male mold. Manufacturing equipment.
を昇降可能で，かつ傾斜面を持つ棒状のカムを垂直に設
けるとともに，前記ストッパは，雌型が上昇位置にある
時は，前記ばねにより雄型の中心へ向けて付勢されて全
体が雄型内に没入し，雌型が下降する際に，雌型の上下
動に伴って前記縦穴内を上下動する前記カムによりスト
ッパの後端部が水平方向外方に駆動されて，雄型の外周
面から突出するようにされたことを特徴とする請求項１
記載のテーパ角管の製造装置。3. A rod-shaped cam having a slanting surface is provided vertically so as to be vertically movable in a vertical vertical hole formed in the center of the male die, and the stopper is provided when the female die is in the raised position. ， By the spring, which is urged toward the center of the male die and the whole is immersed in the male die, and when the female die descends, by the cam that moves up and down in the vertical hole as the female die moves up and down. The rear end of the stopper is driven outward in the horizontal direction so as to project from the outer peripheral surface of the male mold.
The taper rectangular tube manufacturing apparatus described.
を製造するテーパ角管の製造方法であって，素材角管の
絞り成形を複数回のプレス動作に分けて行うとともに，
各プレス動作において，雌型の上昇時に前記ストッパに
よりテーパ角管を剥離された雌型の内面に潤滑油を塗布
することを特徴とするテーパ角管の製造方法。4. A method for manufacturing a tapered rectangular tube using the manufacturing apparatus according to claim 1, wherein the material rectangular tube is drawn by a plurality of pressing operations.
In each press operation, a lubricating oil is applied to the inner surface of the female die from which the tapered rectangular pipe has been peeled off by the stopper when the female die is raised, and a method for producing a tapered rectangular tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6027474A JPH07214151A (en) | 1994-01-31 | 1994-01-31 | Device for manufacturing tapered square pipe and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6027474A JPH07214151A (en) | 1994-01-31 | 1994-01-31 | Device for manufacturing tapered square pipe and method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07214151A true JPH07214151A (en) | 1995-08-15 |
Family
ID=12222120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6027474A Withdrawn JPH07214151A (en) | 1994-01-31 | 1994-01-31 | Device for manufacturing tapered square pipe and method thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07214151A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003082495A1 (en) * | 2002-04-03 | 2003-10-09 | Nakayama Corporation | Cold diameter reduction press molding method of metal pipe and metal pipe molded by that method |
| CN103586347A (en) * | 2013-11-06 | 2014-02-19 | 苏州工业园区新凯精密五金有限公司 | Detent blanking die structure |
| CN108857420A (en) * | 2018-08-16 | 2018-11-23 | 佛山市名东科技有限公司 | A kind of roller type cone side machine |
-
1994
- 1994-01-31 JP JP6027474A patent/JPH07214151A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003082495A1 (en) * | 2002-04-03 | 2003-10-09 | Nakayama Corporation | Cold diameter reduction press molding method of metal pipe and metal pipe molded by that method |
| CN103586347A (en) * | 2013-11-06 | 2014-02-19 | 苏州工业园区新凯精密五金有限公司 | Detent blanking die structure |
| CN108857420A (en) * | 2018-08-16 | 2018-11-23 | 佛山市名东科技有限公司 | A kind of roller type cone side machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
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