JP3706865B2 - Pipe material groove forming method - Google Patents

Pipe material groove forming method Download PDF

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JP3706865B2
JP3706865B2 JP2003375744A JP2003375744A JP3706865B2 JP 3706865 B2 JP3706865 B2 JP 3706865B2 JP 2003375744 A JP2003375744 A JP 2003375744A JP 2003375744 A JP2003375744 A JP 2003375744A JP 3706865 B2 JP3706865 B2 JP 3706865B2
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groove
pipe material
core metal
forming
peripheral end
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JP2004314169A (en
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重雄 小田
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有限会社オダ技商
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Priority to PCT/KR2004/000670 priority patent/WO2004087346A1/en
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    • 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
    • B21D17/00—Forming single grooves in sheet metal or tubular or hollow articles
    • B21D17/02—Forming single grooves in sheet metal or tubular or hollow articles by pressing
    • 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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/02—Stamping using rigid devices or tools
    • B21D22/04—Stamping using rigid devices or tools for dimpling

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Description

本発明は、例えば、自動車のシートバックに取付けられるヘッドレスステイの脚部を構成するパイプ材に溝部を形成する成形方法に関するものである。   The present invention relates to a molding method for forming a groove portion in a pipe material constituting a leg portion of a headless stay attached to a seat back of an automobile, for example.

従来、図９に示すような自動車のシートバック用ヘッドレスステイの脚部等をを構成するパイプ材１に溝部５を形成する方法として、図１０に示すように、成形型５０を、パイプ材１の正対方向から押し付けて成形するものがある。
また、回動自在の成形型を、パイプ材の周端部に対して垂直方向に下降移動させて予備成形を行った後、プレス加工によって本成形を行うものもある（例えば、特許文献１参照）。
特開２００２−２１０５１９号公報 Conventionally, as shown in FIG. 10, as a method of forming the groove portion 5 in the pipe material 1 constituting the leg portion of the headless stay for a seat back of an automobile as shown in FIG. There are some that are pressed from the front facing direction.
In addition, there is a type in which main molding is performed by press working after preforming by rotating a rotatable mold downward in the vertical direction with respect to the peripheral end portion of the pipe material (for example, see Patent Document 1). ).
JP 2002-210519 A

しかしながら、前者の従来技術は、パイプ材が薄肉の場合には、その成形型の押圧力によってパイプ材が破れてしまうといった問題がある。
また、後者の従来技術（特許文献１）は、予備成形と本成形の二つの工程を必要とするので、生産性に問題がある。 However, the former prior art has a problem that when the pipe material is thin, the pipe material is broken by the pressing force of the molding die.
Further, the latter prior art (Patent Document 1) requires two steps of pre-forming and main forming, and thus has a problem in productivity.

そこで、本発明の目的とするところは、薄肉のパイプ材でも破損させることなく成形することができ、かつ、生産性に優れるパイプ材の溝部成形方法を提供することを課題とする。   Accordingly, an object of the present invention is to provide a method for forming a groove of a pipe material that can be molded without damaging even a thin pipe material and is excellent in productivity.

上記の目的を達成するために、本発明の請求項１に記載のパイプ材の溝部成形方法は、パイプ材（１）に溝部（５）を形成する成形方法であって、前記パイプ材（１）の空洞部（２）に、前記溝部（５）の雌型となる単数または複数の凹部（１１）を周端部（３）に有する芯金（１０）を挿入して両者を固定し、回動自在に取付けた単数または複数の回転雄型（２０）を、前記パイプ材（１）に対して垂直方向から移動させ、転動する前記回転雄型（２０）の外周端部を、パイプ材（１）の中心よりずれた周端部で、前記芯金（１０）が有する凹部（１１）に相対向する方向に対して垂直方向から当接させ、パイプ材（１）の周端部（１ａ）を前記凹部（１１）へ潰し込むという一回の加工で溝部（５）を形成してなることを特徴とするものである。 In order to achieve the above object, a pipe material groove forming method according to claim 1 of the present invention is a forming method of forming a groove (5) in a pipe material (1), the pipe material (1 ) In the hollow portion (2) of the groove portion (5) is inserted with a core metal (10) having a single or a plurality of concave portions (11) in the peripheral end portion (3) to fix both, One or a plurality of rotating male molds (20) rotatably attached are moved from the vertical direction with respect to the pipe material (1), and the outer peripheral end of the rotating male mold (20) is rolled into a pipe. The peripheral end of the pipe member (1) is brought into contact with the concave portion (11) of the cored bar (10) from the direction perpendicular to the peripheral end shifted from the center of the member (1). (1a) which is characterized in that the by forming a groove (5) in a single processing of the Komu crush into the recess (11) A.

また、請求項２に記載のパイプ材の溝部成形方法は、前記芯金（１０）の周端部に、前記溝部（５）の高さより大きい空間部（４）を形成し、前記溝部（５）成形後、前記芯金（１０）に形成した空間部（４）が、前記溝部（５）側に位置するように、芯金（１０）を回転した後、その芯金（１０）を抜き出してなることを特徴とする。   Moreover, the groove part shaping | molding method of the pipe material of Claim 2 forms the space part (4) larger than the height of the said groove part (5) in the surrounding edge part of the said metal core (10), The said groove part (5) ) After molding, after rotating the core metal (10) so that the space (4) formed in the core metal (10) is located on the groove (5) side, the core metal (10) is extracted. It is characterized by.

さらに、請求項３に記載のパイプ材の溝部成形方法は、前記芯金（１０）の周端部に、前記溝部（５）の高さより大きい空間部（４）を形成し、前記溝部（５）成形後、前記芯金（１０）に形成した空間部（４）が、前記溝部（５）側に位置するように、芯金（１０）に対して前記パイプ材（１）を回転した後、そのパイプ材（１）を抜き出してなることを特徴とする。   Furthermore, the groove part shaping | molding method of the pipe material of Claim 3 forms the space part (4) larger than the height of the said groove part (5) in the peripheral edge part of the said metal core (10), and the said groove part (5). ) After molding, after rotating the pipe material (1) with respect to the core metal (10) so that the space (4) formed in the core metal (10) is located on the groove (5) side The pipe material (1) is extracted.

また、請求項４に記載のパイプ材の溝部成形方法は、前記回転雄型（２０）を、短円柱形状の円形雄型（２１）または円錐体形状の円錐雄型（２２）としてなることを特徴とする。 Further, in the pipe material groove forming method according to claim 4, the rotating male mold (20) is formed as a short cylindrical circular male mold (21) or a conical male conical male mold (22). Features.

なお、カッコ内の記号は、図面および後述する発明の実施の形態に記載された対応要素または対応事項を示す。   Symbols in parentheses indicate corresponding elements or corresponding matters described in the drawings and embodiments of the invention described later.

本発明の請求項１に記載のパイプ材の溝部成形方法によれば、回転雄型を垂直方向へ移動させ、転動する外周端部でパイプ材の周端部に溝部を形成するので、薄肉のパイプ材を加工する場合でも破損しない。すなわち、回転雄型で、パイプ材の周端部を垂直方向に押圧するので、当該パイプ材を突き破ることがないからである。
また、パイプ材の空洞部に雌型である凹部を有する芯金を挿入し、その凹部と回転雄型とで溝部を成形するので、一回の加工で完成した溝部を形成することができる。
これにより、生産性の向上を図ることができる。 According to the method for forming a groove portion of a pipe material according to claim 1 of the present invention, the rotating male mold is moved in the vertical direction, and the groove portion is formed at the peripheral end portion of the pipe material at the outer peripheral end portion that rolls. Even when the pipe material is processed, it is not damaged. That is, because the rotating male mold presses the peripheral end of the pipe material in the vertical direction, the pipe material is not pierced.
Further, since a cored bar having a female concave portion is inserted into the hollow portion of the pipe material and the groove portion is formed by the concave portion and the rotating male die, the completed groove portion can be formed by one processing.
Thereby, productivity can be improved.

また、請求項２に記載の発明によれば、請求項１に記載の発明の作用効果に加えて、芯金の周端部に、溝部の高さより大きい空間部を形成したので、芯金を回転させて引き抜くことにより、パイプ材から容易に抜き出すことができる。
従って、成形加工が容易で、生産性をさらに高めることができる。 According to the invention described in claim 2, in addition to the function and effect of the invention described in claim 1, since the space portion larger than the height of the groove portion is formed in the peripheral end portion of the core metal, By rotating and pulling out, it can be easily pulled out from the pipe material.
Therefore, the molding process is easy and the productivity can be further increased.

さらに、請求項３に記載の発明によれば、請求項１に記載の発明の作用効果に加えて、芯金の周端部に、溝部の高さより大きい空間部を形成したので、芯金に対してパイプ材を回転させて容易に引き抜くことができる。
従って、成形加工が容易で、生産性をさらに高めることができる。 Furthermore, according to the invention described in claim 3, in addition to the function and effect of the invention described in claim 1, since the space portion larger than the height of the groove portion is formed in the peripheral end portion of the core metal, On the other hand, it can be easily pulled out by rotating the pipe material.
Therefore, the molding process is easy and the productivity can be further increased.

また、請求項４に記載の発明によれば、請求項１乃至３のうちいずれか一つに記載の発明の作用効果に加えて、回転雄型を、短円柱形状の円形雄型または円錐体形状の円錐雄型としたので、断面矩形状や傾斜状の溝部を容易に形成することができる。   According to the invention described in claim 4, in addition to the operational effects of the invention described in any one of claims 1 to 3, the rotating male mold is replaced by a short male circular male cone or cone. Since it has a conical male shape, a groove having a rectangular cross section or an inclined shape can be easily formed.

図１乃至図３を参照して、本発明の第一実施形態に係るパイプ材の溝部成形方法について説明する。図１は、パイプ材の溝部成形方法を示す正面図であり、図２は、その要部側面図である。図３は、それに使用する芯金を示すもので、（ａ）は正面図、（ｂ）は側面図である。   With reference to FIG. 1 thru | or FIG. 3, the groove part shaping | molding method of the pipe material which concerns on 1st embodiment of this invention is demonstrated. FIG. 1 is a front view showing a method for forming a groove of a pipe material, and FIG. 2 is a side view of the main part thereof. FIGS. 3A and 3B show a cored bar used therein, wherein FIG. 3A is a front view and FIG. 3B is a side view.

本発明の実施形態に係るパイプ材の溝部成形方法は、自動車のシートバックに取付けられるヘッドレストステイの脚部を構成するパイプ材１に複数の溝部５を、パイプ材１の長手方向に形成するものである。
当該溝部成形方法は、まず、パイプ材１を、上型４１と下型４２と渦巻きバネ４３を有する固定治具４０の前記下型４２に上載し、その空洞部２に、溝部５の雌型となる複数の凹部１１を周端部３に有する芯金１０を挿入して固定する。この固定は、芯金１０の端部に形成した鍔部１２を固定部材（図示せず）等に組付けることによって行うことができる。 In the pipe material groove forming method according to the embodiment of the present invention, a plurality of groove portions 5 are formed in the longitudinal direction of the pipe material 1 in the pipe material 1 constituting the legs of the headrest stay attached to the seat back of the automobile. It is.
In the groove portion forming method, first, the pipe material 1 is placed on the lower die 42 of the fixing jig 40 having the upper die 41, the lower die 42 and the spiral spring 43, and the female die of the groove portion 5 is placed in the cavity portion 2. A cored bar 10 having a plurality of recesses 11 at the peripheral end 3 is inserted and fixed. This fixing can be performed by assembling the flange 12 formed at the end of the cored bar 10 to a fixing member (not shown) or the like.

次に、固定治具４０の直上に、渦巻きバネ４５を介して設けた押し型４４を下降して、それに回動自在に取付けた回転雄型２０を垂直方向へ下降移動させる。これに伴い、固定治具４０の上型４１も下降移動して、下型４２と協働してパイプ材１を固定する。同時に、パイプ材１に摺接して転動する回転雄型２０の外周端部で、パイプ材１の左右片側周端部１ａを押圧し、凹部１１へ潰し込んで溝部５を形成する。
すなわち、転動する回転雄型２０の外周端部を、パイプ材１の中心よりずれた周端部１ａ（図１ではパイプ材１の中心より右側にずれている）で、芯金１０が有する凹部１１に相対向する方向（図１では右側から左側にかけての水平方向）に対して垂直方向（図１では上側から下側にかけての垂直方向）から当接させ、パイプ材１の周端部１ａを凹部１１へ潰し込んで、溝部５を形成する。
なお、本実施形態では、回転雄型２０として、短円柱形状の円形雄型２１と円錐体形状の円錐雄型２２の両方を使用し、芯金１０の凹部１１もそれに対応した形状、すなわち垂直凹部と傾斜溝用凹部としている。 Next, the pressing die 44 provided via the spiral spring 45 is lowered immediately above the fixing jig 40, and the rotating male die 20 rotatably attached thereto is moved downward in the vertical direction. Along with this, the upper mold 41 of the fixing jig 40 also moves downward, and cooperates with the lower mold 42 to fix the pipe material 1. At the same time, the left and right one-side peripheral end portions 1 a of the pipe member 1 are pressed by the outer peripheral end portion of the rotating male mold 20 that slides in contact with the pipe member 1 and is crushed into the recess 11 to form the groove portion 5.
That is, the metal core 10 has the outer peripheral end portion of the rotating rotating male mold 20 at the peripheral end portion 1a that is shifted from the center of the pipe material 1 (in FIG. 1, it is shifted to the right side from the center of the pipe material 1). A circumferential end 1a of the pipe member 1 is brought into contact with a direction opposite to the recess 11 (horizontal direction from the right side to the left side in FIG. 1) from the vertical direction (vertical direction from the upper side to the lower side in FIG. 1). Is crushed into the recess 11 to form the groove 5.
In the present embodiment, both the short cylindrical circular male mold 21 and the conical male male mold 22 are used as the rotating male mold 20, and the concave portion 11 of the cored bar 10 has a corresponding shape, that is, a vertical shape. It is set as the recessed part and the recessed part for inclined grooves.

また、芯金１０を、その上下一方周端部（図１では下側周端部）に、溝部５の高さより大きい空間部４を形成したものを使用している。これにより、溝部５を成形後、当該芯金１０を９０°、溝部５側（図１では９０°反時計回り）へ回転して引き抜くことにより、溝部５と干渉することなく容易に抜き出すことができる。   Further, the cored bar 10 is used in which a space 4 larger than the height of the groove 5 is formed at one of the upper and lower peripheral ends (the lower peripheral end in FIG. 1). Thus, after forming the groove 5, the cored bar 10 can be easily pulled out without interfering with the groove 5 by rotating and pulling out the core metal 10 to the groove 5 side (90 ° counterclockwise in FIG. 1). it can.

なお、本実施形態では、芯金１０を回転してパイプ材１の中から引き抜くようにしたものであるが、これにかえて、芯金１０側を固定し、芯金１０に対してパイプ材１の方を回転させることにより引き抜くようにすることもできる。   In this embodiment, the cored bar 10 is rotated and pulled out from the pipe material 1. Instead, the cored bar 10 side is fixed and the piped material is fixed to the cored bar 10. It can also be pulled out by rotating one.

図４および図５を参照して、本発明の第二実施形態に係るパイプ材の溝部成形方法について説明する。図４は、パイプ材の溝部成形方法を示す正面図である。図５は、この溝部成形方法に使用する板状雄型を示すもので、（ａ）は正面図、（ｂ）は側面図である。   With reference to FIG. 4 and FIG. 5, the groove part shaping | molding method of the pipe material which concerns on 2nd embodiment of this invention is demonstrated. FIG. 4 is a front view showing a method for forming a groove of a pipe material. FIGS. 5A and 5B show a plate-like male mold used in this groove forming method, wherein FIG. 5A is a front view and FIG. 5B is a side view.

この溝部成形方法の特徴は、第一実施形態における回転雄型２０に代えて、回動しない長尺板形状の板状雄型３０を使用したことである。この板状雄型３０を、同様に垂直方向へ下降させてパイプ材１の左右片側周端部１ａを押圧して、芯金１０の凹部１１に潰し込むことによって、パイプ材１を破損させることなく、かつ、一回の加工によって溝部５を形成することができる。   A feature of this groove forming method is that a long plate-shaped plate-shaped male mold 30 that does not rotate is used instead of the rotating male mold 20 in the first embodiment. Similarly, the plate-shaped male mold 30 is lowered in the vertical direction to press the left and right one-side peripheral end portions 1a of the pipe material 1 so as to be crushed in the concave portion 11 of the core metal 10, thereby damaging the pipe material 1. And the groove 5 can be formed by a single process.

なお、図６に示すように、板状雄型３０の先端部（下端部）のパイプ材１に当接する側を直線状（（ａ）参照）または曲線状（（ｂ）参照）の傾斜面３０ａとすることもできる。
この場合、パイプ材１の左右片側周端部１ａを、傾斜面３０ａによって徐々に変形することができるので、パイプ材１に偏肉部６を形成することなく、溝部５を形成することができる（図７参照）。 In addition, as shown in FIG. 6, the side which contacts the pipe material 1 of the front-end | tip part (lower end part) of the plate-shaped male type | mold 30 is a linear (refer (a)) or curved surface (refer (b)) inclined surface. It can also be 30a.
In this case, since the left and right one-side circumferential end portions 1a of the pipe material 1 can be gradually deformed by the inclined surface 30a, the groove portion 5 can be formed without forming the uneven thickness portion 6 in the pipe material 1. (See FIG. 7).

また、図５，図６に示した回動しない長尺板形状の板状雄型３０は、芯金１０の凹部１１を垂直凹部として、パイプ材１に垂直溝を形成する場合について示したが、図８に示すような板状雄型３０を使用して芯金１０の凹部１１を傾斜溝用凹部として、パイプ材１に傾斜溝を形成することもできる。すなわち、長尺板形状の板状雄型３０は、芯金１０の有する凹部１１と略同じ断面形状の部位を有するものであればよい。   In addition, the long plate-shaped plate-shaped male mold 30 that does not rotate shown in FIGS. 5 and 6 shows a case in which the concave portion 11 of the core metal 10 is a vertical concave portion and a vertical groove is formed in the pipe material 1. The inclined groove can also be formed in the pipe material 1 by using the plate-shaped male mold 30 as shown in FIG. That is, the long plate-shaped plate-shaped male mold 30 only needs to have a portion having substantially the same cross-sectional shape as the concave portion 11 of the cored bar 10.

本発明の第一実施形態に係るパイプ材の溝部成形方法を示す正面図である。It is a front view which shows the groove part shaping | molding method of the pipe material which concerns on 1st embodiment of this invention. 図１に示す溝部成形方法の要部側面図である。It is a principal part side view of the groove part shaping | molding method shown in FIG. 図１に示す溝部成形方法に使用する芯金を示すもので、（ａ）は正面図、（ｂ）は側面図である。The core metal used for the groove part shaping | molding method shown in FIG. 1 is shown, (a) is a front view, (b) is a side view. 本発明の第二実施形態に係るパイプ材の溝部成形方法を示す正面図である。It is a front view which shows the groove part shaping | molding method of the pipe material which concerns on 2nd embodiment of this invention. 図４に示す溝部成形方法に使用する板状雄型を示すもので、（ａ）は正面図、（ｂ）は側面図である。The plate-shaped male type | mold used for the groove part shaping | molding method shown in FIG. 4 is shown, (a) is a front view, (b) is a side view. 板状雄型の他の実施形態を示すもので、（ａ）は直線状の傾斜面、（ｂ）は曲線状の傾斜面を有するものの正面図である。The other embodiment of a plate-shaped male type | mold is shown, (a) is a linear inclined surface, (b) is a front view of what has a curved inclined surface. パイプ材の溝部を示す正面断面図である。It is front sectional drawing which shows the groove part of a pipe material. 板状雄型の他の実施形態を示すもので、（ａ）は正面図、（ｂ）は（ａ）のＡ−Ａ線断面図である。The other embodiment of a plate-shaped male type | mold is shown, (a) is a front view, (b) is the sectional view on the AA line of (a). 自動車のシートバック用ヘッドレスステイを示す斜視図である。It is a perspective view which shows the headless stay for seat backs of a motor vehicle. 従来例に係る溝部成形方法を示す正面断面図である。It is front sectional drawing which shows the groove part shaping | molding method which concerns on a prior art example.

符号の説明Explanation of symbols

１ パイプ材
１ａ 周端部
２ 空洞部
３ 周端部
４ 空間部
５ 溝部
６ 偏肉部
１０ 芯金
１１ 凹部
１２ 鍔部
２０ 回転雄型
２１ 円形雄型
２２ 円錐雄型
３０ 板状雄型
３０ａ 傾斜面
４０ 固定治具
４１ 上型
４２ 下型
４３ 渦巻きバネ
４４ 押し型
４５ 渦巻きバネ
５０ 成形型 DESCRIPTION OF SYMBOLS 1 Pipe material 1a Circumferential edge part 2 Cavity part 3 Circumferential edge part 4 Space part 5 Groove part 6 Thickness part 10 Core metal 11 Recessed part 12 Ridge part 20 Rotating male type | mold 21 Circular male type | mold 22 Conical male type | mold 30 Plate-shaped male type | mold 30a Inclination Surface 40 Fixing jig 41 Upper mold 42 Lower mold 43 Spiral spring 44 Push mold 45 Spiral spring 50 Mold

Claims (4)

パイプ材に溝部を形成する成形方法であって、
前記パイプ材の空洞部に、前記溝部の雌型となる単数または複数の凹部を周端部に有する芯金を挿入して両者を固定し、
回動自在に取付けた単数または複数の回転雄型を前記パイプ材に対して垂直方向から移動させ、転動する前記回転雄型の外周端部を、パイプ材の中心線よりずれた周端部で、前記芯金が有する凹部に相対向する方向に対して垂直方向から当接させ、パイプ材の周端部を前記凹部へ潰し込むという一回の加工で溝部を形成してなることを特徴とするパイプ材の溝部成形方法。 A molding method for forming a groove in a pipe material,
In the hollow portion of the pipe material, insert a core metal having a single or a plurality of concave portions at the peripheral end portion to be a female mold of the groove portion, and fix both.
One or a plurality of rotating male dies that are rotatably attached are moved from a direction perpendicular to the pipe material, and the outer peripheral end of the rotating male die that rolls is displaced from the center line of the pipe material. The groove portion is formed by a single process of contacting the concave portion of the core metal in a direction perpendicular to the opposing direction and crushing the peripheral end portion of the pipe material into the concave portion. A method for forming a groove of a pipe material. 前記芯金の周端部に、前記溝部の高さより大きい空間部を形成し、前記溝部成形後、前記芯金に形成した空間部が前記溝部側に位置するように、芯金を回転した後、抜き出してなることを特徴とする請求項１に記載のパイプ材の溝部成形方法。   After forming a space portion larger than the height of the groove portion in the peripheral end portion of the core metal, and after rotating the core metal so that the space portion formed in the core metal is positioned on the groove portion side after the groove portion molding. The method for forming a groove of a pipe material according to claim 1, wherein the groove is formed by extracting. 前記芯金の周端部に、前記溝部の高さより大きい空間部を形成し、前記溝部成形後、前記芯金に形成した空間部が前記溝部側に位置するように、芯金に対して前記パイプ材を回転した後、抜き出してなることを特徴とする請求項１に記載のパイプ材の溝部成形方法。   A space portion larger than the height of the groove portion is formed at a peripheral end portion of the core metal, and after forming the groove portion, the space portion formed in the core metal is positioned on the groove portion side with respect to the core metal. The method for forming a groove of a pipe material according to claim 1, wherein the pipe material is extracted after being rotated. 前記回転雄型を、短円柱形状の円形雄型または円錐体形状の円錐雄型としてなることを特徴とする請求項１乃至３のうちいずれか一つに記載のパイプ材の溝部成形方法。   The pipe member groove forming method according to any one of claims 1 to 3, wherein the rotating male mold is a circular male mold having a short cylindrical shape or a conical male mold having a conical shape.
JP2003375744A 2003-04-01 2003-11-05 Pipe material groove forming method Expired - Fee Related JP3706865B2 (en)

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PCT/KR2004/000670 WO2004087346A1 (en) 2003-04-01 2004-03-25 A method of making the groove of pipe materials

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KR100870404B1 (en) 2007-04-04 2008-11-25 주식회사다스 fixing groove forming device for support pipe
JP4477695B1 (en) * 2009-10-21 2010-06-09 有限会社オダ技商 Pipe material groove forming method
KR101174426B1 (en) 2010-10-08 2012-08-16 주식회사 와이에스테크 Device for forming of antenna rod
JP5603283B2 (en) * 2011-04-15 2014-10-08 松本工業株式会社 Recessing device
JP5070355B1 (en) * 2011-12-14 2012-11-14 有限会社オダ技商 Groove forming method for pipe material
CN110788184B (en) * 2019-11-07 2021-05-25 江西晖旭实业有限公司 Metal pipeline cut straightly coupling assembling shaping processing equipment

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