JPH06285539A - Extruding method for metallic shape whose cross sectional shape is varied continuously - Google Patents
Extruding method for metallic shape whose cross sectional shape is varied continuouslyInfo
- Publication number
- JPH06285539A JPH06285539A JP10185793A JP10185793A JPH06285539A JP H06285539 A JPH06285539 A JP H06285539A JP 10185793 A JP10185793 A JP 10185793A JP 10185793 A JP10185793 A JP 10185793A JP H06285539 A JPH06285539 A JP H06285539A
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- JP
- Japan
- Prior art keywords
- die
- shape
- flange
- width
- longitudinal direction
- Prior art date
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、建築や自動車、船舶な
どの構造物の梁材に用いられる形材の製造方法に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a profile used for a beam of a structure such as a building, an automobile or a ship.
【０００２】[0002]
【従来の技術】構造物の梁材は一般に、水平の状態で両
端を支持されて、垂直荷重を支える機能を有している。
そのとき、中央に重量物が乗せられると、図７に示すよ
うに、梁１に加わる曲げモーメント図は中央断面で最大
になり、両端２、２′が単純支持の場合、ゼロになる。
従って、梁材においては、中央部が特別に大きな負荷を
受けることになるので、一般の部材はその中央部の負荷
に耐えられる寸法に合わせて設計され、そのまま均一断
面の形材が用いられることがほとんどである。2. Description of the Related Art Beam members of a structure generally have a function of supporting both ends by supporting both ends in a horizontal state.
At that time, when a heavy object is placed in the center, as shown in FIG. 7, the bending moment diagram applied to the beam 1 becomes maximum in the central cross section, and becomes zero when both ends 2, 2'are simply supported.
Therefore, in the beam material, the central part will be subjected to a particularly large load, so general members should be designed to a size that can withstand the load in the central part, and the shape member with a uniform cross section should be used as it is. Is the most.
【０００３】このことは前述のように、モーメントの低
い両端近傍では、部材断面が過剰寸法になっていること
を意味する。これによって、構造物は不必要な重量を有
することになり、その部材の無駄のみならず、それを支
える部材の全てが大型となり、かつコスト高を引き起こ
している。これに対し、必要最小限の断面を与えるため
に、図８のような形材が当然考えられて、フランジ４、
４′とウェブ５の板を切断して溶接で組み合わせたもの
が知られている。しかしながら、このような形材を製造
するには切断、溶接用の開先加工、溶接、形状矯正など
の多数の工程を経なければならない。This means that the member cross section is oversized near both ends where the moment is low, as described above. As a result, the structure has an unnecessary weight, not only the waste of the member but also the size of all members supporting the structure is increased and the cost is increased. On the other hand, in order to give a necessary minimum cross section, a profile as shown in FIG.
It is known that 4'and the plate of the web 5 are cut and combined by welding. However, in order to manufacture such a profile, a number of processes such as cutting, groove processing for welding, welding, and shape correction must be performed.
【０００４】[0004]
【発明が解決しようとする課題】本発明は、従来技術で
非常に手数をかけて製造していた、長手方向に断面形状
の変化する形材に関して、はるかに容易に製造する方法
を提供するものである。DISCLOSURE OF THE INVENTION The present invention provides a much easier method for producing a profile whose cross-sectional shape changes in the longitudinal direction, which was produced with great effort in the prior art. Is.
【０００５】[0005]
【課題を解決するための手段】本発明は従来技術の欠点
を解消し、断面の一部が長手方向で変化する形材を容易
に製造する方法を模索し、押出しダイスの穴形状を連続
的に変化させることによってこれを実現した。即ち、本
発明の要旨はダイスを通して形材を押出す工程におい
て、該ダイスの横から仕切板を出し入れすることによっ
て、ダイス穴の辺の少なくとも一部の形材厚さあるいは
幅を変化させることによって、形材の断面形状を長手方
向に変化させることを特徴とする、金属形材の押出し加
工法にある。DISCLOSURE OF THE INVENTION The present invention solves the drawbacks of the prior art and seeks a method for easily manufacturing a profile in which a part of the cross section changes in the longitudinal direction, and continuously forms the hole shape of the extrusion die. This was achieved by changing to. That is, the gist of the present invention is that in the step of extruding a profile through a die, by inserting and removing the partition plate from the side of the die, by changing the profile thickness or width of at least a part of the side of the die hole. The method for extruding a metal profile is characterized in that the cross-sectional shape of the profile is changed in the longitudinal direction.
【０００６】[0006]
【作用】以下に、本発明を詳述する。図１は、本発明の
Ｃ形材のフランジ厚が連続的に変化する押出し工程の態
様例を示す。コンテナー８内の丸断面の素材１１を、プ
ランジャー１０で押し付け、ダイス６の穴７から製品１
１′を押し出す。この時、ダイス６の横に仕切板９、
９′を設置し、これらを水平方向に出し入れ自由とする
ことによってダイス出口穴の形状を押出し中に変化させ
る。この操作によって製品の断面は長手方向に変化した
ものが得られる。図１の例では、最初に仕切板９、９′
を押し込んでおいて押出しの進行とともに引き出して行
くことにより、フランジ厚を連続的に厚くしている例を
示す。The present invention will be described in detail below. FIG. 1 shows an example of an extrusion process in which the flange thickness of the C-shaped material of the present invention is continuously changed. The material 11 having a round cross section in the container 8 is pressed by the plunger 10 and the product 1 is pushed through the hole 7 of the die 6.
Push 1 '. At this time, a partition plate 9 beside the dice 6,
The shape of the die exit holes is changed during extrusion by installing 9'and allowing them to be freely moved in and out in the horizontal direction. By this operation, a product whose cross section changes in the longitudinal direction can be obtained. In the example of FIG. 1, first, the partition plates 9 and 9 '
An example is shown in which the flange thickness is continuously increased by pushing in and pulling out with the progress of extrusion.
【０００７】仕切板を出し入れ自由にしておくことによ
り、フランジ厚は一旦厚くなった後、再び薄くして行く
ことも可能であり、それらの操作を繰り返すと断面形状
が長手方向に変化する部材が同時に多数製造でき、後で
適宜切断して用いれば良い。By allowing the partition plate to be freely taken in and out, it is possible to make the flange thickness thicker and then thin it again. If these operations are repeated, a member whose cross-sectional shape changes in the longitudinal direction is formed. A large number of products can be manufactured at the same time, and they may be appropriately cut and used later.
【０００８】図２はＣ形材のフランジ幅が連続的に変化
する押し出し工程の態様例である。丸断面の素材１１
を、ダイス６の穴７を通して製品１１′を押し出す。こ
の時、ダイス６の上に仕切板９、９′を設置し、これら
を垂直方向に出し入れ自由とすることによってダイス出
口穴の形状を押出し中に変化させる。この操作によって
製品のフランジ幅が長手方向に変化したものが得られ
る。図２の例では、最初に仕切板９、９′を押し込んで
おいて押出しとともに引き出して行くことにより、フラ
ンジ幅を連続的に広くしている例を示す。この場合も仕
切板の出し入れを繰り返すことにより断面形状が長手方
向に変化する部材が同時に多数製造できる。FIG. 2 shows an example of an extruding process in which the flange width of the C-shaped member continuously changes. Round cross-section material 11
The product 11 'is extruded through the hole 7 of the die 6. At this time, partition plates 9 and 9'are installed on the die 6, and these can be freely taken in and out in the vertical direction to change the shape of the die outlet hole during extrusion. By this operation, a product in which the flange width is changed in the longitudinal direction can be obtained. The example of FIG. 2 shows an example in which the flange width is continuously widened by first pushing in the partition plates 9 and 9'and then withdrawing them together with extrusion. Also in this case, a large number of members whose cross-sectional shapes change in the longitudinal direction can be simultaneously manufactured by repeatedly taking in and out the partition plate.
【０００９】また、必要に応じて水平方向と垂直方向に
出し入れ自由な仕切板を備えることにより、２方向の寸
法を変化させることも可能である。図３は角パイプの辺
の厚さが連続的に変化する押出し工程の態様例である。
丸断面の素材１１を、ダイス６の導入穴１２から出口穴
と中子１３の間を通して製品１１′を押し出す。この
時、ダイス６の横に仕切板９、９′を設置し、これらを
水平方向に出し入れ自由とすることによってダイス出口
の形状を押出し中に変化させる。この操作によって製品
の２辺の厚さが長手方向に変化したものが得られる。図
３の例では、最初に仕切板９、９′を押し込んでおいて
押出しとともに引き出して行くことにより、２辺の厚さ
を連続的に広くしている例を示す。この場合も仕切板の
出し入れを繰り返すことにより断面形状が長手方向に変
化する部材が同時に多数製造できる。It is also possible to change the dimension in two directions by providing a partition plate which can be freely inserted and removed in the horizontal direction and the vertical direction, if necessary. FIG. 3 is an example of an embodiment of an extrusion process in which the side thickness of a square pipe changes continuously.
The material 11 'having a round cross section is extruded from the introduction hole 12 of the die 6 through the space between the exit hole and the core 13 to extrude the product 11'. At this time, partition plates 9 and 9'are installed beside the die 6 and are freely moved in and out in the horizontal direction to change the shape of the die outlet during extrusion. By this operation, it is possible to obtain a product in which the thickness of the two sides changes in the longitudinal direction. In the example of FIG. 3, the partition plates 9 and 9 ′ are first pushed in and then pushed out and pulled out to continuously increase the thickness of the two sides. Also in this case, a large number of members whose cross-sectional shapes change in the longitudinal direction can be simultaneously manufactured by repeatedly taking in and out the partition plate.
【００１０】また、必要に応じて水平方向と垂直方向に
出し入れ自由な仕切板を備えることにより、２方向の寸
法を変化させることも可能である。It is also possible to change the dimension in two directions by providing a partition plate which can be freely taken in and out in the horizontal direction and the vertical direction, if necessary.
【００１１】図４はこうして製造した形材の例を示し、
１４はウェブ、１５、１５′はフランジを示す。（ａ）
はＣ形断面で中央部のフランジ厚が最大となっており、
端部に向かってフランジ厚が連続的に減少している。
（ｂ）はＣ形断面でフランジ厚が一方の端部で最大、他
の端部で最小となっており、（ｃ）はフランジ幅が中央
で最大、（ｄ）は端部で最大となっている例である。FIG. 4 shows an example of the profile thus manufactured,
14 is a web, and 15 and 15 'are flanges. (A)
Has a maximum flange thickness in the center of the C-shaped cross section,
The flange thickness continuously decreases toward the end.
(B) shows a C-shaped cross section with the maximum flange thickness at one end and the minimum at the other end. (C) shows the maximum flange width at the center and (d) shows the maximum at the end. It is an example.
【００１２】図５において、（ｅ）はＨ形断面で中央部
のフランジ厚が最大、（ｆ）は中央部フランジ幅が最大
となっている例を示す。また、（ｇ）は角パイプの２辺
１７、１７′が長手方向中央部において最大厚となり、
他の２辺１６、１６′の厚さは一定の例、（ｈ）は２辺
１７、１７′が一方の端部で最大、他方の端部で最小と
なっている例を示す。In FIG. 5, (e) shows an example in which the flange thickness of the central portion is maximum in the H-shaped cross section, and (f) shows the maximum flange width of the central portion. Further, in (g), the two sides 17, 17 'of the square pipe have the maximum thickness in the central portion in the longitudinal direction,
The thickness of the other two sides 16 and 16 'is constant, and (h) shows an example in which the two sides 17 and 17' are maximum at one end and minimum at the other end.
【００１３】中央部の断面が最大となっているものは両
端を支持して中央部に最大荷重が負荷される用途に最適
であり、片端部の断面が最大のものは、その部分だけを
支えて荷重を負荷する構造に向いている。ただし、いず
れも厚さを増した部分に垂直な曲げモーメントを受ける
構造に有効である。The one having the largest cross section at the central portion is most suitable for the application in which both ends are supported and the maximum load is applied to the central portion, and the one having the largest cross section at one end supports only that portion. It is suitable for structures that apply a load. However, both are effective for the structure that receives a bending moment perpendicular to the thickened portion.
【００１４】なお、断面形状の長手方向の変化は一定の
増減率で与えることも可能であるが、必要に応じて断面
形状を変化させない部分を含むことも容易に操作でき
る。また、端なるＣ形材やＨ形材、角パイプのみなら
ず、フランジ外側の面に長手方向に縞状の凹凸を施した
ものでも全く同様に適用できる。The change of the cross-sectional shape in the longitudinal direction can be given at a constant increase / decrease rate, but it is possible to easily operate to include a portion whose cross-sectional shape is not changed, if necessary. Further, not only the end C-shaped members, H-shaped members, and square pipes, but also those having striped unevenness in the longitudinal direction on the outer surface of the flange can be applied in exactly the same manner.
【００１５】以上のように、この形材は従来の溶接組立
に比べて容易に製造できる上、一体で構成されているた
め、強度や疲労特性にも優れかつ、品質の信頼性も極め
て高い。このような特性を有することにより、通常の建
築の梁の外、自動車の下部構造やドアの補強材、航空機
の翼回り、土木分野では橋梁の橋桁など、曲げ外力を受
ける部分に有効に利用される。材質は用途上、アルミニ
ウム鋼、チタン、その他各種合金材が含まれる。As described above, this shape member can be manufactured more easily than the conventional welding assembly, and since it is integrally formed, it has excellent strength and fatigue characteristics and has extremely high quality reliability. Having such characteristics, it can be effectively used not only for beams of ordinary construction, but also for reinforcing structures of automobile substructures and doors, around aircraft wings, bridge girders of bridges in the field of civil engineering, etc. It Materials include aluminum steel, titanium, and various alloy materials in terms of use.
【００１６】[0016]
【実施例】アルミニウム合金６０６１を用いて、熱間押
し出しにて表１、図６に示す寸法を有する形材を製作し
た。ここに長さは全て１ｍとし、本発明法により製作し
た形材は全て、長手方向の中央部において最大断面を有
する。一方、従来法によりダイス穴形状が変化せずに製
作した形材は、本発明法の形材の中央最大断面と等しい
一様断面とした。表１で、Ｗ0は中央部幅、Ｗ1は端部
幅、Ｈ0 は中央部高さ、Ｈ1は端部高さ、Ｗ′は内のり
幅、Ｈ′は内のり高さを示す。Example Using aluminum alloy 6061, a profile having dimensions shown in Table 1 and FIG. 6 was manufactured by hot extrusion. Here, all the lengths are set to 1 m, and all the profiles manufactured by the method of the present invention have the maximum cross section in the central portion in the longitudinal direction. On the other hand, the profile produced by the conventional method without changing the die hole shape has a uniform cross section equal to the central maximum cross section of the profile of the present invention. In Table 1, W 0 is the center width, W 1 is the end width, H 0 is the center height, H 1 is the end height, W ′ is the inner width, and H ′ is the inner height.
【００１７】断面（ａ）はＨ断面で本発明法ではフラン
ジ厚をＨ0＝８０ｍｍからＨ1＝７０ｍｍに連続変化させ
たもので、従来法ではフランジ厚がＨ0、Ｈ1＝８０ｍｍ
一様としたものである。断面（ｂ）はＨ断面で本発明法
ではフランジ幅をＷ0 ＝６０ｍｍからＷ1＝３５ｍｍに
連続変化させたもので、従来法ではフランジ幅がＷ0、
Ｗ1 ＝６０ｍｍ一様としたものである。断面（ｃ）は角
パイプで本発明法では上下の高さをＨ0＝８０ｍｍから
Ｈ1＝７０ｍｍに連続変化させたもので、従来法では上
下の高さをＨ0、Ｈ1＝８０ｍｍ一様としたものである。The section (a) is an H section, and in the method of the present invention, the flange thickness is continuously changed from H 0 = 80 mm to H 1 = 70 mm. In the conventional method, the flange thickness is H 0 , H 1 = 80 mm.
It is uniform. The section (b) is an H section, which is obtained by continuously changing the flange width from W 0 = 60 mm to W 1 = 35 mm in the method of the present invention. In the conventional method, the flange width is W 0 ,
W 1 = 60 mm uniform. The cross-section (c) is a square pipe, and in the method of the present invention, the vertical height is continuously changed from H 0 = 80 mm to H 1 = 70 mm. In the conventional method, the vertical height is H 0 , H 1 = 80 mm. It is something like that.
【００１８】それぞれの形材の重量を表１に示した。こ
れらの形材を水平にセットして、油圧試験機を用いて垂
直方向の荷重を負荷し、降伏が発生するときの曲げモー
メントを算出した。なお、試験時の負荷速度は毎分１０
０ｍｍとした。各形材の降伏曲げモーメントを表１に示
した。The weight of each shape is shown in Table 1. These profiles were set horizontally and a vertical load was applied using a hydraulic tester to calculate the bending moment when yielding occurred. The load speed during the test was 10 minutes per minute.
It was set to 0 mm. The yield bending moment of each shape is shown in Table 1.
【００１９】それぞれの、断面形状毎に本発明法と従来
法を比較すると、降伏モーメントは両者ほとんど同じで
ある一方で、重量は本発明法になる形材が１７〜２１％
も軽いことが分かり、軽量化に極めて有効であることが
示されている。Comparing the method of the present invention with the conventional method for each cross-sectional shape, the yield moments are almost the same, but the weight is 17 to 21% for the profile material according to the method of the present invention.
It was also found to be light, and it has been shown to be extremely effective for weight reduction.
【００２０】[0020]
【表１】 [Table 1]
【００２１】[0021]
【発明の効果】本発明は、土木建築、輸送機械などの構
造において、曲げ外力を受ける部分に適用されて、強度
の信頼性が高く、かつ必要最小限の軽量部材を安価に提
供するものであり、工業的に価値が大きいことは明かで
ある。INDUSTRIAL APPLICABILITY The present invention is applied to a portion which receives a bending external force in a structure such as civil engineering and construction, a transportation machine, etc., and provides a lightweight member having high strength reliability and a necessary minimum amount at low cost. Yes, it is obvious that it has great industrial value.
【図１】Ｃ形断面のフランジ厚を変化させる本発明の態
様例である。FIG. 1 is an example of an embodiment of the present invention in which a flange thickness of a C-shaped cross section is changed.
【図２】Ｃ形断面のフランジ幅を変化させる本発明の態
様例である。FIG. 2 is an example of an embodiment of the present invention in which the flange width of the C-shaped cross section is changed.
【図３】角パイプの２辺の厚さを変化させる本発明の態
様例である。FIG. 3 is an example of an embodiment of the present invention in which the thickness of two sides of a square pipe is changed.
【図４】（ａ），（ｂ），（ｃ），（ｄ）は本発明法に
より製作可能な形材の態様例である。4 (a), (b), (c), and (d) are examples of the shapes of the shape members that can be manufactured by the method of the present invention.
【図５】（ｅ），（ｆ），（ｇ），（ｈ）は本発明法に
より製作可能な形材の態様例である。5 (e), (f), (g), and (h) are examples of the shape of the profile that can be manufactured by the method of the present invention.
【図６】（ａ），（ｂ），（ｃ）は実施例の断面図であ
る。6 (a), (b) and (c) are sectional views of an embodiment.
【図７】梁の中央荷重に対する曲げモーメント分布図で
ある。FIG. 7 is a bending moment distribution diagram for a central load of a beam.
【図８】（ａ），（ｂ）は中央に最大の断面２次モーメ
ントを有するＨ形の梁材を示す図である。8 (a) and 8 (b) are views showing an H-shaped beam member having a maximum second moment of area in the center.
１ 梁 ２ 支持 ２′ 支持 ３ 曲げモーメント ４ フランジ ４′ フランジ ５ ウェブ ６ ダイス ７ ダイス穴 ８ コンテナー ９ 仕切板 ９′ 仕切板 １０ プランジャー １１ 素材 １１′ 押出し製品 １２ ダイス導入穴 １３ 中子 １４ ウェブ １５ フランジ １５′ フランジ １６ 一定厚の辺 １６′ 一定厚の辺 １７ 厚さ変化のある辺 １７′ 厚さ変化のある辺 1 Beam 2 Support 2'Support 3 Bending Moment 4 Flange 4'Flange 5 Web 6 Die 7 Die Hole 8 Container 9 Partition Plate 9'Partition Plate 10 Plunger 11 Material 11 'Extruded Product 12 Die Introduction Hole 13 Core 14 Web 15 Flange 15 'Flange 16 Side with constant thickness 16' Side with constant thickness 17 Side with varying thickness 17 'Side with varying thickness
フロントページの続き (72)発明者 栗山 幸久 千葉県富津市新富20−１ 新日本製鐵株式 会社技術開発本部内Front Page Continuation (72) Inventor Yukihisa Kuriyama 20-1 Shintomi, Futtsu City, Chiba Nippon Steel Corp. Technology Development Division
Claims (1)
いて、該ダイスの横から仕切板を出し入れすることによ
って、ダイス穴の辺の少なくとも一部の形材厚さあるい
は幅を変化させることによって、形材の断面形状を長手
方向に変化させることを特徴とする、金属形材の押出し
加工法。1. In a step of extruding a profile through a die, a partition plate is taken in and out from the side of the die to change the profile thickness or width of at least a part of the side of the die hole to thereby obtain the profile. A method for extruding a metal profile, characterized in that the cross-sectional shape of the is changed in the longitudinal direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10185793A JPH06285539A (en) | 1993-04-06 | 1993-04-06 | Extruding method for metallic shape whose cross sectional shape is varied continuously |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10185793A JPH06285539A (en) | 1993-04-06 | 1993-04-06 | Extruding method for metallic shape whose cross sectional shape is varied continuously |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06285539A true JPH06285539A (en) | 1994-10-11 |
Family
ID=14311695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10185793A Pending JPH06285539A (en) | 1993-04-06 | 1993-04-06 | Extruding method for metallic shape whose cross sectional shape is varied continuously |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06285539A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996021528A1 (en) * | 1995-01-12 | 1996-07-18 | Mitsubishi Aluminum Co., Ltd. | Die for extrusion of variable cross section and extrusion molding method for variable cross section |
| WO1996028264A1 (en) * | 1995-03-16 | 1996-09-19 | Mitsubishi Aluminum Co., Ltd. | Variable cross section extruding die and variable cross section extrusion molding method |
| US6681610B2 (en) * | 2001-01-31 | 2004-01-27 | Honda Giken Kogyo Kabushiki Kaisha | Process for extruding tube having different sections and die for tube extrusion molding |
| US7069760B2 (en) * | 2000-06-10 | 2006-07-04 | In Tai Jin | Device and method for manufacturing a curved metal tube or rod |
| US7971465B2 (en) * | 2006-10-16 | 2011-07-05 | The Boeing Company | Planar beam dump |
| US8544310B2 (en) | 2005-11-08 | 2013-10-01 | Kobe Steel, Ltd. | Method of molding forged product from roughly shaped material |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0531527A (en) * | 1991-07-29 | 1993-02-09 | Isuzu Motors Ltd | Method for forming member having different sectional shapes partially and die used therefor |
-
1993
- 1993-04-06 JP JP10185793A patent/JPH06285539A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0531527A (en) * | 1991-07-29 | 1993-02-09 | Isuzu Motors Ltd | Method for forming member having different sectional shapes partially and die used therefor |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996021528A1 (en) * | 1995-01-12 | 1996-07-18 | Mitsubishi Aluminum Co., Ltd. | Die for extrusion of variable cross section and extrusion molding method for variable cross section |
| WO1996028264A1 (en) * | 1995-03-16 | 1996-09-19 | Mitsubishi Aluminum Co., Ltd. | Variable cross section extruding die and variable cross section extrusion molding method |
| US7069760B2 (en) * | 2000-06-10 | 2006-07-04 | In Tai Jin | Device and method for manufacturing a curved metal tube or rod |
| US6681610B2 (en) * | 2001-01-31 | 2004-01-27 | Honda Giken Kogyo Kabushiki Kaisha | Process for extruding tube having different sections and die for tube extrusion molding |
| KR100463215B1 (en) * | 2001-01-31 | 2004-12-23 | 혼다 기켄 고교 가부시키가이샤 | Method for extruding tubes having a deformed section and die therefor |
| US8544310B2 (en) | 2005-11-08 | 2013-10-01 | Kobe Steel, Ltd. | Method of molding forged product from roughly shaped material |
| US7971465B2 (en) * | 2006-10-16 | 2011-07-05 | The Boeing Company | Planar beam dump |
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