JPS6092016A - Manufacture of tapered square pipe - Google Patents

Manufacture of tapered square pipe

Info

Publication number
JPS6092016A
JPS6092016A JP19784683A JP19784683A JPS6092016A JP S6092016 A JPS6092016 A JP S6092016A JP 19784683 A JP19784683 A JP 19784683A JP 19784683 A JP19784683 A JP 19784683A JP S6092016 A JPS6092016 A JP S6092016A
Authority
JP
Japan
Prior art keywords
pipe
tapered
upper die
flat
circular pipe
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP19784683A
Other languages
Japanese (ja)
Inventor
Akira Okamoto
朗 岡本
Yoshitake Harutake
治武　良剛
Yoshitaka Fujii
藤井　義孝
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHOWA PAUL KK
Original Assignee
SHOWA PAUL KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SHOWA PAUL KK filed Critical SHOWA PAUL KK
Priority to JP19784683A priority Critical patent/JPS6092016A/en
Publication of JPS6092016A publication Critical patent/JPS6092016A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D15/00—Corrugating tubes
    • B21D15/02—Corrugating tubes longitudinally
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/155—Making tubes with non circular section
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/16—Making tubes with varying diameter in longitudinal direction
    • B21C37/18—Making tubes with varying diameter in longitudinal direction conical tubes

Abstract

PURPOSE:To reduce cost of a tapered square pipe by bumping plural dies having flat faces inclined at a specified angle against a tapered circular pipe in perpendicular direction. CONSTITUTION:Sliding bodies having flat faces 6a-6d for bumping are attached to opposite faces 5a-5d of an upper die 2 and lower die 3, and the upper die 2 repeats vertical movement by a driving device. When the upper die 2 goes down and the flat face for bumping 4 strikes against the surface of the tapered circular pipe 1, sliding bodies 6a-6d are slid by elastic force of springs 9, 10, and deviation of contact position of the flat face for bumping 4 and the surface of the circular pipe 1 is prevented. By repetition of vertical movement of the upper die 2, the circular pipe 1 is deformed to square sectional form surrounded by flat faces for bumping 4. Thus, cost can be reduced, and a well-finished tapered square pipe can be obtained.

Description

【発明の詳細な説明】 この発明は、たとえば照明用ボール、旋用ポールとして
使用される横断面角形のテーパー付きパイプ（以下テー
パー付き角形パイプという）の製造法に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a tapered pipe with a square cross section (hereinafter referred to as a tapered square pipe) used as, for example, a lighting ball or a turning pole.

この種のテーパー付き角形パイプは、従来たとえばアル
ミニウム板のような金属板を所定の形状に切断した後、
この金属板を折曲げ加工により角形パイプの形状に折り
曲げ、その両側縁部を互いに突き合わせて溶接により接
合することにより製造していた。このような従来の方法
によれば、金属板の切断および折り曲げ作業に精度を要
するうえに、溶接作業に熟練を要し、したがってテーパ
ー付き角形パイプの製造が非常に面倒であった。しかも
溶接部分がテーパー付き角形パイプの側縁部外側に表わ
れるため、仕−Ｆりがきれいでないという欠点かあった
。This type of tapered rectangular pipe has traditionally been produced by cutting a metal plate, such as an aluminum plate, into a predetermined shape.
This metal plate was bent into the shape of a rectangular pipe by bending, and both side edges of the pipe were butted against each other and joined by welding. According to such conventional methods, cutting and bending of the metal plate requires precision, and welding requires skill, making it extremely troublesome to manufacture tapered rectangular pipes. Moreover, since the welded portion appears on the outside of the side edge of the tapered rectangular pipe, there is a drawback that the finish is not clean.

この発明は、上記の欠点を除去するためになされたもの
で、テーパー付き角形パイプを非常に簡単な作業によっ
て製造することができ、しかも非常に仕上がりのきれい
なテーパー付き角形パイプを製造し得る方法を提供する
ことを目的としている。This invention was made in order to eliminate the above-mentioned drawbacks, and to provide a method for manufacturing a tapered rectangular pipe with a very simple operation and with an extremely beautiful finish. is intended to provide.

この発明は、上記の目的を達成するために、横断面円形
のテーパー付きパイプ（以下テーパー付き円形パイプと
いう）を用意し、このパイプの中心軸に対するパイプ外
側面の傾斜角と略同−の角度で傾斜した１つまたは２つ
以上の打′Ｊ１用平坦面を有する少なくとも２個のダイ
スを、パイプを介して対向させて、このテーパー付き円
形パイプの周りに少なくとも３つの打撃用平坦面を配置
し、これらの打撃用平坦面を有するダイスをパイプにそ
の中心軸に対して直角方向に打ち付けることにより、上
記パイプをすべての打撃用平坦面により囲まれた横断面
角形に変形せしめることを特徴とするテーパー付き角形
パイプの製造法を要旨としている。In order to achieve the above object, the present invention prepares a tapered pipe with a circular cross section (hereinafter referred to as a tapered circular pipe), and makes an angle approximately the same as the inclination angle of the outer surface of the pipe with respect to the central axis of the pipe. At least two dies having one or more flat hitting surfaces inclined at the same angle are placed opposite each other across the pipe, and at least three flat hitting surfaces are arranged around the tapered circular pipe. The pipe is then deformed into a rectangular cross section surrounded by all the flat impact surfaces by hitting the pipe with a die having a flat impact surface in a direction perpendicular to the central axis of the pipe. The gist of this paper is a method for manufacturing tapered rectangular pipes.

上記において、テーパー付き円形パイプは、通常のテー
パーのない円管よりなる素材を従来のロータリー拳スェ
ープラグ法などによりテーパー付き円形パイプに成形す
ることにより得られるものである。In the above, the tapered circular pipe is obtained by forming a normal non-tapered circular pipe material into a tapered circular pipe by a conventional rotary fist swing plug method or the like.

この発明の方法により製造されるテーパー付き角形パイ
プは、横断面三角形、四角形、あるいは六角形というよ
うな多角形を有するものである。The tapered rectangular pipe manufactured by the method of the present invention has a polygonal cross section such as a triangular, quadrangular, or hexagonal cross section.

ダイスの打撃用平坦面は、テーパー付き円形パイプの外
側面と略同−の角度で傾斜したものであり、横断面三角
形のテーパー付きパイプを製造する場合には３つ、四角
形の場合には４つ、六角形の場合には６つというように
、少なくとも３つの打撃用平坦面をテーパー付き円形パ
イプの固りに配置する。The striking flat surfaces of the die are inclined at approximately the same angle as the outer surface of the tapered circular pipe, and there are three flat surfaces when manufacturing a tapered pipe with a triangular cross section, and four flat surfaces when manufacturing a tapered pipe with a rectangular cross section. At least three striking flat surfaces, one or six in the case of a hexagonal shape, are arranged on the mass of the tapered circular pipe.

打撃用平坦面は１個のダイスについて１つまたは２つ以
上備えられており、テーパー付き円形パイプを介して少
なくとも２個のダイスを対向せしめる。とくに作業性の
点から２個のダイスを使用して、一方のダイスを固定し
、他方のダイスを可動のものとするのが好ましい。勿論
−付き円形パイプを介して３個以上のダイスを対向せし
めることもある。One or more hitting flat surfaces are provided for each die, and at least two of the dies are made to face each other via the tapered circular pipe. In particular, from the viewpoint of workability, it is preferable to use two dies, with one die fixed and the other die movable. Of course, three or more dice may be opposed to each other via a circular pipe with a -.

つぎに、この発明の実施例を図面を参照して説明する。Next, embodiments of the invention will be described with reference to the drawings.

なお、実施例はこの発明の方法により横断面正方形のア
ルミニウム製テーパー付きパイプを製造する場合を示す
ものである。The examples show the case where an aluminum tapered pipe with a square cross section is manufactured by the method of the present invention.

第１図〜第４図において、この発明の方法は、まず第１
図に示すように、アルミニウム製テーパー付き円形パイ
プ（１）を用意し、このパイプ（１）を、４つの打撃用
平坦面（４）を有する上下一対のダイス＋２１　＋３１
を備えた第２図と第３図に示す装置を用いてその外側面
（］ａ）より叩くことにより変形せしめ、第４図に示す
ような横断面正方形のテーパー付きパイプ（１１）を製
造するものである。In FIGS. 1 to 4, the method of the present invention first
As shown in the figure, an aluminum tapered circular pipe (1) is prepared, and this pipe (1) is inserted into a pair of upper and lower dies +21 +31 having four flat hitting surfaces (4).
The tapered pipe (11) with a square cross section as shown in Fig. 4 is produced by deforming it by hitting it from its outer surface (]a) using the device shown in Figs. 2 and 3 equipped with It is something.

第２図と第３図において、上部ダイス（２）は図示しな
い油田式駆動装置によって昇降することができ、これに
対し下部ダイス（３）は固定されている。上部ダイス（
２）と下部ダイス（３）には、直角に配置された側面よ
りみて逆Ｖ形とＶ形の対向面（５ａ）（５ｂ）と（５０
）（５ｄ）とがそれぞれ設けられており、これらの対向
面（５ａ）〜（５ｄ）に打撃用平坦面（４）を有する摺
動体（６ａ）〜（６ｄ）か対向面（５ａ）〜（５ｄ）に
対して摺動自在なるように取り付けられている。すなわ
ち各対向面（５ａ）〜（５ｄ）の両端部には横断面り形
の案内凸部（７）か設けられ、摺動体（６ａ）〜（６ｄ
）の両端部に設けられた張出縁部（８）がこれらの案内
凸部（７）に嵌め合わせられることにより、各摺動体（
６ａ）　〜（６ｄ）が対向面（５ａ）〜（５ｄ）にその
長手方向に対して直角方向に摺動し得るようになされて
いるものである。そして上部ダイス（２）の１組の摺動
体（６ａ）（６ｂ）は上部ダイス（２）に取り付けられ
た一対ずつのばね（９）によって常に下方に付勢されて
おり、摺動体（６ａ）（１）の下側縁部は一対の位置調
節用ボルト（１０により受け＋１−められている。下部
ダイス（３）の１組の摺動体（６ｅ）（６ｄ）は下部ダ
イス（３）に取り付けられた一対のばね（９）によって
常に上方に付勢されており、摺動体（６Ｑ）（６ｄ）の
上側縁部は一対の位置調節用ボルト（１０）により受け
市められている。In FIGS. 2 and 3, the upper die (2) can be raised and lowered by an oil field drive (not shown), whereas the lower die (3) is fixed. Upper die (
2) and the lower die (3) have opposing surfaces (5a), (5b) and (50
) (5d) are respectively provided, and sliding bodies (6a) to (6d) having a flat hitting surface (4) on these opposing surfaces (5a) to (5d) or opposing surfaces (5a) to ( 5d) so as to be slidable. In other words, guide protrusions (7) in the shape of a cross section are provided at both ends of each of the opposing surfaces (5a) to (5d), and the sliding bodies (6a) to (6d)
) by fitting the protruding edges (8) provided at both ends of the guide protrusions (7) into the respective sliding bodies (
6a) to (6d) are configured to be able to slide on the opposing surfaces (5a) to (5d) in a direction perpendicular to the longitudinal direction thereof. The pair of sliding bodies (6a) (6b) of the upper die (2) is always urged downward by a pair of springs (9) attached to the upper die (2), and the sliding body (6a) The lower edge of (1) is received by a pair of position adjustment bolts (10). A pair of sliding bodies (6e) (6d) of the lower die (3) is attached to the lower die (3). It is always urged upward by a pair of attached springs (9), and the upper edge of the sliding body (6Q) (6d) is received by a pair of position adjustment bolts (10).

各摺動体（６ａ）〜（６ｄ）の打撃用平坦面（４）はテ
ーパー付き円形パイプ（１）の中心軸（１）に対するパ
イプ外側面（１ａ）の傾斜角（のと略同−の角オ０ 度で傾斜している。また首互に隣り合う打撃用平坦面（
４）のテーパー付きパイプ（１）の先細側の端部同志か
互いに干渉し合うのを防止するために、各打撃用平坦面
（４）はパイプ（１）の先細側に向って漸次狭くなる台
形を有している。The striking flat surface (4) of each sliding body (6a) to (6d) is at an angle approximately equal to the inclination angle of the outer surface (1a) of the pipe with respect to the central axis (1) of the tapered circular pipe (1). The flat hitting surfaces (
In order to prevent the tapered ends of the tapered pipe (1) of 4) from interfering with each other, each striking flat surface (4) becomes gradually narrower toward the tapered side of the pipe (1). It has a trapezoidal shape.

上記において、テーパー付き円形／マイブ（１）の所定
長さの部分を下部ダイス（３）の上にのせ、上部ダイス
（２）を降下せしめると、パイプ（１）は上部ダイス（
２）の摺動体（６ａ）（６ｂ）の打撃用平坦面（４）に
打ち付けられるとともに、相対的に下部ダイス（３）の
摺動体（６ｃ）（６ｄ）の打撃用平坦面（４）によって
も打ち付けられることになる。上部ダイス（２）の上下
動を繰り返すことによりパイプ（１）は四方より変形せ
しめられる。上部ダイス（２）の降下ストロークは駆動
装置の油田の圧力制御により適宜設定する。In the above, when a predetermined length portion of the tapered circular/mib (1) is placed on the lower die (3) and the upper die (2) is lowered, the pipe (1) is transferred to the upper die (
It is struck against the striking flat surface (4) of the sliding body (6a) (6b) of 2), and is relatively struck by the striking flat surface (4) of the sliding body (6c) (6d) of the lower die (3). will also be hit. By repeating the vertical movement of the upper die (2), the pipe (1) is deformed from all sides. The lowering stroke of the upper die (2) is appropriately set by controlling the oil field pressure of the drive device.

ここで、摺動体（６ａ）〜（６ｄ）はパイプ（１）の変
形のさいにパイプ（１）の表面に傷が付くのを防Ｉ１１
するために設けられているものである。すなわち、−上
部ダイス（２）が降下して打撃用平坦面（４）がパイプ
（１）の表面に当たると、下部ダイス（３）の摺動体（
６’０）（６ｄ）はばね（９）の弾発力に抗して下方に
移動せしめられ、これに対し上部ダイス（２）ノ摺動体
（６ａ）（６ｂ）Ｌｔばね（９）ノ弾発カに抗して上方
に移動せしめられる。このため各摺動体（６ａ）〜（６
ｄ）の打撃用平坦面（４）とパイプ（１）の外側面（１
ａ）との当接部分が相互にずれるのを防止することがで
き、これによってパイプ（１）の表面に擦り傷が付くの
を防止することができる。上部ダイス（２）か上昇する
と各摺動体（６ａ）〜（６ｄ）はばね（９）の弾発力に
より元の位置に戻る。なお、パイプ（１）の外側面（１
ａ）か打撃用平坦面（４）の当接部分において座屈する
のを防止するために、各打撃用平坦面（４）のパイプ当
接部分に予め小さい四部を設けておくのが好ましい。Here, the sliding bodies (6a) to (6d) prevent damage to the surface of the pipe (1) when the pipe (1) is deformed.
It is designed to do this. That is, - when the upper die (2) descends and the striking flat surface (4) hits the surface of the pipe (1), the sliding body (
6'0) (6d) are moved downward against the elastic force of the spring (9), and in contrast, the sliding bodies (6a) (6b) of the upper die (2) and the elastic force of the Lt spring (9) It is forced to move upward against the force. For this reason, each sliding body (6a) to (6
The striking flat surface (4) of d) and the outer surface (1) of the pipe (1)
It is possible to prevent the contact portions with a) from shifting from each other, thereby preventing the surface of the pipe (1) from being scratched. When the upper die (2) rises, each sliding body (6a) to (6d) returns to its original position by the elastic force of the spring (9). In addition, the outer surface (1) of the pipe (1)
a) In order to prevent buckling at the abutting portion of each striking flat surface (4), it is preferable to provide four small sections in advance on the pipe abutting portion of each striking flat surface (4).

上記のようにして上部ダイス（２）の上下動を繰り返す
ことにより、テーパー付き円形パイプ（１）は横断面正
方形に変形せしめられる。こうしてパイプ（１）の所定
長さの部分を成形したのち、パ（Ａ） イブ（１）を第３図に矢酔千示す方向にずらせて、上記
の操作を繰り返し、パイプ（１）の次の部分を成形する
。テーパー付き円形パイプ（１）が長い場合には、大き
さの異なるダイス＋２１　＋３１を備えた数台の装置に
より次第に成形していき、最終的に第４図に示すような
横断面正方形のテーパー付き角形パイプ（１１）を製造
するものである。なお、テーパー付き円形パイプ（１）
はその径大側の端部より径小側の端部へと漸次角形に成
形するのが望ましいが、逆にパイプ（１）を径小側から
径大側へ成形することも可能である。By repeating the vertical movement of the upper die (2) as described above, the tapered circular pipe (1) is deformed into a square cross section. After forming a predetermined length of the pipe (1) in this way, shift the pipe (A) and the pipe (1) in the direction shown in Fig. 3 and repeat the above operation to form the next part of the pipe (1). Shape the part. If the tapered circular pipe (1) is long, it is gradually formed using several machines equipped with dies +21 and +31 of different sizes, and finally a tapered pipe with a square cross section as shown in Figure 4 is formed. A square pipe (11) is manufactured. In addition, tapered circular pipe (1)
It is desirable to form the pipe (1) into a rectangular shape gradually from the large diameter end to the small diameter end, but it is also possible to form the pipe (1) from the small diameter side to the large diameter side.

第５図と第６図は、この発明の方法により横断面三角形
のテーパー付きパイプ（１２を製造する場合を示すもの
である。ここで、上部ダイス（２）は昇降することがで
き、これの下面に１つの打撃用平坦面（４）が設けられ
ている。一方、下部ダイス（３）は固定されており、こ
れの上面には側面よりみてＶ形に配置された２つの打撃
用平坦面（４）が設けられている。この下部ダイス（３
）の上に第１図に示すテーパー付き円形パイプ（１）の
所定長さの部分をのせて、上部ダイス（２）を上下動さ
せることにより、パイプ（１）が３つの打撃用平坦面（
４）によって三方より叩かれ、横断面三角形に成形せし
められるものである。なお、下部ダイス（３）の２つの
打撃用平坦面（４）には、パイプ（１）の表面に傷が付
くのを防止するために上記実施例におけるような摺動体
（６６）（６ｄ）を取り付けてもよいが、たとえばテー
パー付き円形パイプ（１）の肉厚が比較的薄く、成形容
易な場合には、このような摺動体（６ｃ）（６ｄ）を取
り付けなくてもよい。5 and 6 show a case where a tapered pipe (12) having a triangular cross section is manufactured by the method of the present invention. Here, the upper die (2) can be raised and lowered, and One striking flat surface (4) is provided on the lower surface.On the other hand, the lower die (3) is fixed, and the upper surface thereof has two striking flat surfaces arranged in a V shape when viewed from the side. (4).This lower die (3) is provided.
) by placing a predetermined length of the tapered circular pipe (1) shown in FIG.
4) is beaten from three sides to form a triangular cross section. In addition, the two striking flat surfaces (4) of the lower die (3) are provided with sliding bodies (66) (6d) as in the above embodiment in order to prevent the surface of the pipe (1) from being scratched. However, for example, if the tapered circular pipe (1) has a relatively thin wall and is easily molded, such sliding bodies (6c) (6d) may not be attached.

第７図と第８図は、この発明の方法により横断面六角形
のテーパー付きパイプ＋１３を製造する場合を示すもの
である。ここで、上部ダイス（２）は昇降することがで
き、これの下面に側面よりみて一形に配置された３つの
打撃用平坦面（４）が設けられている。一方、下部ダイ
ス（３）は固定されており、これの上面にはりに配置さ
れた３つの打撃用平坦面（４）が設けられている。そし
てこの下部ダイス（３）の上にテーパー付き円形パイプ
（１）の所定長さの部分をのせて、上部ダイス（２）を
上下動させることにより、パイプ（１）が合計６つの打
撃用平坦面（４）によって叩かれ、横断面六角形に成形
せしめられるものである。7 and 8 show a case where a tapered pipe +13 having a hexagonal cross section is manufactured by the method of the present invention. Here, the upper die (2) can be raised and lowered, and the lower surface of the upper die (2) is provided with three striking flat surfaces (4) arranged in one shape when viewed from the side. On the other hand, the lower die (3) is fixed, and its upper surface is provided with three striking flat surfaces (4) arranged on the beam. Then, by placing a predetermined length of the tapered circular pipe (1) on the lower die (3) and moving the upper die (2) up and down, the pipe (1) becomes a total of six hitting flats. It is struck by surface (4) and shaped into a hexagonal cross section.

なお、上記各実施例においては、２個のダイス＋２１　
＋３１が上下番ど′配置さ、れて（１６が、これに限ら
ず、ダイス＋２１　（３１をパイプ（１）の左右両側に
配置して、両ダイス１２）　＋３）を水平方向に移動さ
せることもできる。またテーパー付き円形パイプ（１）
を角形に成形するにあたり、３個以上のダイスを使用す
る場合もある。In addition, in each of the above embodiments, 2 dice + 21
+31 is placed in the upper and lower numbers, and (16 is not limited to this), dice +21 (31 is placed on both the left and right sides of the pipe (1), and both dice 12) +3) are moved in the horizontal direction. You can also do it. Also tapered circular pipe (1)
In forming into a square shape, three or more dies may be used.

この発明の方法により製造されたテーパー付き角形パイ
プ（１１）〜ｔ１３１は、たとえば照明用ボール、旋用
ポール、避雷釦用ボール等のボールとして、あるいは各
種の機械や建築物の構成部材として有効に使用し得るも
のである。The tapered rectangular pipes (11) to t131 manufactured by the method of the present invention can be effectively used as balls such as lighting balls, turning poles, lightning protection button balls, etc., or as constituent members of various machines and buildings. It can be used.

この発明によるテーパー付き角形パイプの製造法は、上
述のように、テーパー付き円形パイプ（１）を用意し、
このパイプ（１）の中心軸（１）に対するパイプ外側面
（］ａ）の傾斜角（θ）と略同−の角度で傾斜した１つ
または２つ以上の打撃用平坦面（４）を有する少なくと
も２個のダイスｔ２１　＋３＋を、パイプ（１）を介し
て対向させて、このチーツク−付き円形パイプ（１）の
周りに少なくとも３つの打撃用平坦面（４）を配置し、
これらの打撃用平坦面（４）ヲ有スるダイス＋２）　＋
３）をパイプ（１）にその中心軸（杓に対して直角方向
に打ち付けることにより、ツマイブ（１）をすべての打
撃用平坦面（４）により囲まれた横断面角形に変形せし
めるものであるから、テーパー付き角形パイプＱｌ）〜
（１３を非常に簡単な作業によって製造することができ
、これによってその製造コストを大幅に低減することが
できる。また従来のような溶接作業を行なわないので、
テーパー付き角形パイプ（１１）〜（１３の側縁部に溶
接部分が表われるようなことが全くなく、非常に仕上が
りのきれいなテーパー付き角形７Ｘｌｌイブ０９〜ｕ３
を製造することができるという効果を奏する。The method for manufacturing a tapered square pipe according to the present invention, as described above, prepares a tapered circular pipe (1),
It has one or more hitting flat surfaces (4) that are inclined at approximately the same angle (θ) of the pipe outer surface (]a) with respect to the central axis (1) of this pipe (1). At least two dies t21 +3+ are opposed to each other via the pipe (1), and at least three striking flat surfaces (4) are arranged around the circular pipe (1) with cheeks;
These dies have flat hitting surfaces (4) +2) +
3) is struck against the pipe (1) in a direction perpendicular to its central axis (ladle), thereby deforming the Tsumaib (1) into a square cross section surrounded by all the flat striking surfaces (4). From, tapered square pipe Ql) ~
(13) can be manufactured by very simple operations, which can significantly reduce the manufacturing cost. Also, since conventional welding work is not performed,
Tapered rectangular pipes (11) to (13) have no welded parts visible on the side edges, and have a very clean finish. Tapered rectangular 7Xll pipes 09 to u3
This has the effect that it is possible to manufacture.

【図面の簡単な説明】[Brief explanation of drawings]

第１図はテーパー付き円形パイプの斜視図、第２図はこ
の発明の方法において使用する装置の例を示す側面図、
第３図は第２図ｍ−ｍ線に沿う断面図、第４図は第２図
と第３図の装置を用いて製造したテーパー付き角形パイ
プの斜視図、第５図はこの発明の方法において使用する
装置のいま１つの例を示す側面図、第６図は第５図の装
置を用いて製造したテーパー付き角形パイプの斜視図、
第７図はこの発明の方法において使用する装置のさらに
いま１つの例を示す側面図、第８図は第７図の装置を用
いて製造したテーパー付き角形パイプの斜視図である。 （１）・・・テーパー付き円形パイプ、（２）・−・上
部ダイス、（３）・・・下部ダイス、（４）・ｅ＠打撃
用平坦面、（５ａ）　〜（５ｄ）　＊−・対向面、（６
ａ）　〜（６ｄ）　−０Ｑ摺動体、（９）・１１ｍばね
、＋１＋１−・・位置調節用ポル）、（１１１〜＋１３
１・・・テーパー付き角形パイプ。 以　上 外４名 第１図 第２図FIG. 1 is a perspective view of a tapered circular pipe, and FIG. 2 is a side view showing an example of the apparatus used in the method of the present invention.
FIG. 3 is a cross-sectional view taken along line m-m in FIG. 2, FIG. 4 is a perspective view of a tapered rectangular pipe manufactured using the apparatus shown in FIGS. 2 and 3, and FIG. 5 is a method of the present invention. FIG. 6 is a side view showing another example of the device used in FIG.
FIG. 7 is a side view showing still another example of the apparatus used in the method of the present invention, and FIG. 8 is a perspective view of a tapered rectangular pipe manufactured using the apparatus shown in FIG. (1)...Tapered circular pipe, (2)...Upper die, (3)...Lower die, (4)・e@flat surface for impact, (5a) to (5d) *-・Opposite surface, (6
a) ~ (6d) -0Q sliding body, (9), 11m spring, +1+1-... position adjustment pole), (111 ~ +13
1... Tapered square pipe. Figure 1 Figure 2 Other 4 people

Claims (1)

【特許請求の範囲】[Claims] テーパー付き円形パイプ（１）を用意し、このパイプ（
１）の中心軸（１）に対するパイプ外側面（１ａ）の傾
斜角（θ）と略同−の角度で傾斜した１つまたは２つ以
上の打撃用平坦面（４）を有する少なくとも２個のダイ
ス（２１（３１を、パイプ（１）を介して対向させて、
このテーパー付き円形パイプ（１）の周りに少なくとも
３つの打撃用平坦面（４）を配置し、これらの打撃用平
坦面（４）を有するダイス！２）　＋３＋をパイプ（１
）にその中心軸Ｃりに対して直角方向に打ち付けること
により、パイプ（１）をすべての打撃用平坦面（４）に
より囲まれた横断面角形に変形せしめることを特徴とす
るテーパー付き角形パイプの製造法。Prepare a tapered circular pipe (1), and connect this pipe (
At least two impact flat surfaces (4) having one or more hitting flat surfaces (4) inclined at approximately the same angle (θ) of the outer surface (1a) of the pipe with respect to the central axis (1) of (1). The dice (21 (31) are placed opposite each other through the pipe (1),
At least three striking flat surfaces (4) are arranged around this tapered circular pipe (1), and a die having these striking flat surfaces (4)! 2) Pipe +3+ (1
) in a direction perpendicular to its central axis C, the tapered square pipe is characterized in that the pipe (1) is deformed into a square cross-section surrounded by all flat striking surfaces (4). manufacturing method.
JP19784683A 1983-10-21 1983-10-21 Manufacture of tapered square pipe Pending JPS6092016A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19784683A JPS6092016A (en) 1983-10-21 1983-10-21 Manufacture of tapered square pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19784683A JPS6092016A (en) 1983-10-21 1983-10-21 Manufacture of tapered square pipe

Publications (1)

Publication Number Publication Date
JPS6092016A true JPS6092016A (en) 1985-05-23

Family

ID=16381307

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19784683A Pending JPS6092016A (en) 1983-10-21 1983-10-21 Manufacture of tapered square pipe

Country Status (1)

Country Link
JP (1) JPS6092016A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4785656A (en) * 1986-10-01 1988-11-22 Stratoflex, Inc. Crimping machine for hose and fitting assemblies
US5335530A (en) * 1991-09-10 1994-08-09 Hewing Gmbh Pressing tool for pressing a cylindrical pressing member or a pressing member comprising a cylindrical portion onto a round profile, particularly a pipe conduit
CN103909113A (en) * 2014-04-11 2014-07-09 宁波乐博智能机械科技有限公司 Tapered pipe machine
CN110576314A (en) * 2018-06-08 2019-12-17 东莞市机信机械有限公司 Full-automatic pipe machining production line and method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4785656A (en) * 1986-10-01 1988-11-22 Stratoflex, Inc. Crimping machine for hose and fitting assemblies
US5335530A (en) * 1991-09-10 1994-08-09 Hewing Gmbh Pressing tool for pressing a cylindrical pressing member or a pressing member comprising a cylindrical portion onto a round profile, particularly a pipe conduit
CN103909113A (en) * 2014-04-11 2014-07-09 宁波乐博智能机械科技有限公司 Tapered pipe machine
CN110576314A (en) * 2018-06-08 2019-12-17 东莞市机信机械有限公司 Full-automatic pipe machining production line and method

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