JP2734783B2 - Manufacturing method of irregular cross section - Google Patents
Manufacturing method of irregular cross sectionInfo
- Publication number
- JP2734783B2 JP2734783B2 JP3025305A JP2530591A JP2734783B2 JP 2734783 B2 JP2734783 B2 JP 2734783B2 JP 3025305 A JP3025305 A JP 3025305A JP 2530591 A JP2530591 A JP 2530591A JP 2734783 B2 JP2734783 B2 JP 2734783B2
- Authority
- JP
- Japan
- Prior art keywords
- thin plate
- plate portion
- rolling
- roll
- manufacturing
- 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.)
- Expired - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/08—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel
- B21B1/0805—Flat bars, i.e. having a substantially rectangular cross-section
Description
【０００１】[0001]
【産業上の利用分野】本発明は金属帯板を、溝付ロ―ル
の次に平ロ―ルを用いて圧延する異形断面条の製造方法
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 producing a profiled strip in which a metal strip is rolled using a flat roll and then a flat roll.
【０００２】[0002]
【従来の技術】金属帯板を、溝付ロ―ルの次に平ロ―ル
を用いて圧延する異形断面条の製造方法では、図７
（ａ）に示すように、金属帯板１の両端を溝付ロ―ル１
６の溝８の両脇の円筒部２で圧延することによって図７
（ｂ）に示すように湾曲した厚板部９を有する薄板部３
を先ず成形する。2. Description of the Related Art FIG. 7 shows a method for manufacturing a profile strip in which a metal strip is rolled using a flat roll and then a flat roll.
(A) As shown in FIG.
6 by rolling at the cylindrical portions 2 on both sides of the groove 8 of FIG.
(B) Thin plate portion 3 having curved thick plate portion 9
Is molded first.
【０００３】このときの金属帯板の薄板部３の材料流れ
を見ると、図７（ｂ）に示すように圧下中に板幅方向に
材料流れが生じ中立点４よりエッジ部側に位置する材料
５はエッジ部方向へ、また中立点４より溝部側に位置す
る材料６は溝方向へ流れる。このため、未圧下部である
厚板部７は薄板成形部側からの材料流れによって溝８に
接して湾曲した厚板部９を形成する。[0003] Looking at the material flow in the thin plate portion 3 of the metal strip at this time, as shown in FIG. 7 (b), the material flow occurs in the width direction of the plate during rolling, and is located closer to the edge portion than the neutral point 4. The material 5 flows toward the edge, and the material 6 located on the groove side from the neutral point 4 flows toward the groove. For this reason, the thick plate portion 7 which is the unpressed lower portion contacts the groove 8 by the material flow from the thin plate forming portion side to form a curved thick plate portion 9.
【０００４】次にこの湾曲した厚板部９を図７（ｃ）に
示すように平ロ―ル１５で圧延することによって平坦に
し、図７（ｄ）に示すような異形断面条１０を製造して
いる。[0004] Next, the curved thick plate portion 9 is flattened by rolling it with a flat roll 15 as shown in FIG. 7 (c), and a deformed section strip 10 as shown in FIG. 7 (d) is manufactured. doing.
【０００５】また、１回の溝付ロ―ル及び平ロ―ル圧延
で所望の薄板部幅が確保出来ないような薄板部幅の広い
異形断面条については、図８に示すように溝付ロ―ル圧
延及び平ロ―ル圧延を、繰返し行い、（ａ）→（ｂ）→
（ｃ）→（ｄ）とすることによって所望の薄板部幅を有
する異形断面条としている。[0005] In addition, as shown in FIG. 8, a grooved section having a large width of a thin plate portion such that a desired width of the thin plate portion cannot be ensured by a single roll with flat rolls and flat roll rolling is used. Roll rolling and flat roll rolling are repeated, and (a) → (b) →
By changing from (c) to (d), an irregularly shaped cross section having a desired thin plate portion width is obtained.
【０００６】[0006]
【発明が解決しようとする課題】溝付ロ―ルを用いた異
形断面条の圧延は金属帯板の両端を溝の両脇のフラット
部で圧下することによって薄板部を成形している。この
ときの金属帯板エッジ部の材料流れを見ると圧下中に板
幅方向に材料流れが生じ、中立点よりエッジ部側に位置
する材料はエッジ方向へ、また中立点より溝部側に位置
する材料は溝方向へ流れる。そして、この板幅方向への
材料流れの大きさは板幅方向の位置で異なり、中立点よ
り隔れたところ程大きくなる。これは、薄板部のエッジ
部及び溝部に近づく程隣合う材料からの拘束力が小さく
なるからである。In the rolling of irregularly shaped cross-section strips using a grooved roll, a thin plate portion is formed by rolling down both ends of a metal strip at flat portions on both sides of the groove. Looking at the material flow at the edge of the metal strip at this time, a material flow occurs in the sheet width direction during rolling, and the material located on the edge portion side from the neutral point is located in the edge direction and on the groove side from the neutral point. The material flows in the groove direction. The magnitude of the material flow in the plate width direction differs at the position in the plate width direction, and becomes larger as the distance from the neutral point increases. This is because the closer to the edge portion and the groove portion of the thin plate portion, the smaller the binding force from the adjacent material.
【０００７】このため、図９（ａ）に示すように、極端
に表現すると、薄板部３の板幅方向の板厚分布は中立点
４を境にして薄板部のエッジ部１１に近づくほど、また
段差部１２に近づくほど板厚が薄くなり薄板部板厚差△
ｔを生じる。Therefore, as shown in FIG. 9 (a), when expressed in an extreme manner, the thickness distribution of the thin plate portion 3 in the plate width direction is such that the closer to the neutral point 4, the closer to the edge portion 11 of the thin plate portion. In addition, the plate thickness becomes thinner as it approaches the step portion 12, and the plate portion thickness difference △
yields t.
【０００８】次に、湾曲した厚板部を平ロ―ルで圧伸し
異形断面条とし、上記のような板厚分布の薄板部を有す
る異形断面条１０をさらに溝付ロ―ル１６に圧延及び平
ロ―ル１５圧延を繰返し行うことによって、薄板部幅の
広い異形断面条を得ようとすると、図９（ｂ）に示すよ
うに、薄板部のエッジ部１１の圧下量が薄板部の中央部
１３の圧下量より少なくなるため、圧延中の材料の相対
的な流れの中でエッジ部１１に圧延方向の引張力が働く
ことになる。そして、この引張力の大きさは薄板部の板
幅方向の板厚分布が大きくなるほど大きくなり、場合に
よっては薄板部の割れを引起し、生産性及び製品歩留を
低下させる原因となっていた。Next, the curved thick plate portion is drawn with a flat roll to form a deformed cross-section, and the deformed cross-section strip 10 having the thin plate portion having the above-described thickness distribution is further formed into a grooved roll 16. In order to obtain a deformed cross section having a wide thin plate portion by repeatedly performing rolling and flat roll 15 rolling, as shown in FIG. 9B, the amount of reduction of the edge portion 11 of the thin plate portion is reduced. Therefore, a tensile force in the rolling direction acts on the edge portion 11 in the relative flow of the material during rolling. And the magnitude of this tensile force becomes larger as the thickness distribution in the thickness direction of the thin plate portion increases, and in some cases, cracks in the thin plate portion are caused, thereby reducing productivity and product yield. .
【０００９】本発明の目的は、前記従来技術の欠点を解
消し、所望の薄板部板厚分布を有する異形断面条を得る
こと、また溝付ロ―ル及び平ロ―ル圧延を繰返し行うこ
とによって薄板部幅の広い異形断面条を製造する際、薄
板部に割れが発生しないような溝付ロ―ル形状を用いる
異形断面条の製造方法を提供することにある。SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned disadvantages of the prior art, to obtain a profiled section having a desired thin plate thickness distribution, and to repeatedly perform grooved roll and flat roll rolling. It is an object of the present invention to provide a method of manufacturing a deformed cross-section strip using a grooved roll shape such that cracks do not occur in the thin plate section when manufacturing a deformed cross-section strip having a wide thin plate portion.
【００１０】[0010]
【課題を解決するための手段及び作用】本発明の要旨
は、溝付ロ―ル圧延法による異形断面条の製造方法にお
いて、溝の両脇の円筒部をテ―パ―加工した溝付ロ―ル
を用いたことにあり、これによって被圧延材の薄板部厚
分布を自由に変えられるようにしたこと、及び薄板部に
割れが発生しないようにしたことにある。SUMMARY OF THE INVENTION The gist of the present invention is to provide a method of manufacturing a profiled cross-sectioned strip by a grooved roll rolling method, in which a cylindrical portion on both sides of the groove is tapered. The purpose of this is to make it possible to freely change the thickness distribution of the thin plate portion of the material to be rolled, and to prevent the occurrence of cracks in the thin plate portion.
【００１１】即ち本発明の上記目的は、金属帯板を、溝
付ロ―ルの次に平ロ―ルを用いて圧延して、幅方向に板
厚の異なる部分を長手方向に連続して有する異形断面条
を製造する方法において、前記溝付ロ―ルの溝の両脇の
円筒部を内側細りの勾配にテ―パ―加工した溝付ロ―ル
を用いて圧延することを特徴とする異形断面条の製造方
法によって達成される。That is, the object of the present invention is to roll a metal strip using a flat roll and then a grooved roll, and to continuously connect portions having different thicknesses in the width direction in the longitudinal direction. A method of manufacturing a profiled strip having a groove, wherein the cylindrical portions on both sides of the groove of the grooved roll are rolled using a grooved roll tapered to an inner narrow gradient. This is achieved by a method of manufacturing a modified cross-section strip.
【００１２】本発明における溝の両脇の円筒部を内側細
りの勾配にテ―パ―加工するには、採用するテ―パ―の
角度として、従来の溝付ロ―ルの溝の両脇の円筒部で圧
延された薄板部の板幅方向での第９図で示した板厚差△
ｔは、図１０（ａ）、（ｂ）に示すように、被圧延材の
材質、純銅は（ａ）図、純アルミニウムは（ｂ）図に示
すように、材料によって、又薄板部の圧延加工度によっ
て（横軸）、更にまた板部幅（１０mm、１５mm、２０m
m）によって変わるので、このため本発明における、溝
付ロ―ルの溝の両脇に加工するテ―パ―の角度もこれら
の条件に合わせて適宜設定しなければならない。In order to taper the cylindrical portions on both sides of the groove in the present invention to have a tapered inner slope, the angle of the taper to be employed is set at the both sides of the groove of the conventional grooved roll. The thickness difference shown in FIG. 9 in the width direction of the thin plate portion rolled by the cylindrical portion of FIG.
As shown in FIGS. 10 (a) and 10 (b), t is the material of the material to be rolled, pure copper is shown in FIG. 10 (a), and pure aluminum is shown in FIG. 10 (b). Depending on the degree of processing (horizontal axis), the width of the plate part (10 mm, 15 mm, 20 m)
m), the angle of the taper to be worked on both sides of the groove of the grooved roll in the present invention must be appropriately set in accordance with these conditions.
【００１３】図１は本発明の製造方法に用いる溝付ロ―
ル１４の形状（ａ）及びテ―パ―角度θの決め方を示す
図表（ｂ1 ，ｂ2 ）を示すものである。純銅（ｂ1 ）
図、及び純アルミニウム（ｂ2 ）図に対し、示すような
薄板部加工度％と薄板部幅（１０mm，１５mm，２０mm）
に対し、圧延された薄板部の板幅方向での板厚差が△ｔ
＝０mmとなるようなテ―パ―角度θを示したものであ
る。FIG. 1 shows a grooved row used in the manufacturing method of the present invention.
FIG. 3 is a table (b 1 , b 2 ) showing how to determine the shape (a) of the tape 14 and the taper angle θ. Pure copper (b 1 )
In comparison with the figure and the pure aluminum (b 2 ) figure, the thin plate part work percentage and the thin plate width (10 mm, 15 mm, 20 mm) as shown
On the other hand, the thickness difference of the rolled thin plate portion in the width direction is Δt.
The taper angle θ is such that = 0 mm.
【００１４】即ち、材料、薄板部加工度、薄板部幅に応
じてテ―パ―角度θを選定する。That is, the taper angle θ is selected according to the material, the degree of processing of the thin plate portion, and the width of the thin plate portion.
【００１５】[0015]
【実施例】以下本発明の実施態様を実施例を用いて説明
する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below with reference to examples.
【００１６】実施例−１ 板厚２．０mm、板幅４０mmの純銅帯板を第２図（ａ）に
示すように従来の溝付ロ―ル１６（溝の両脇が円筒部）
で圧延（加工度７０％）とすると、圧延された薄板部の
板幅方向での板厚差△ｔは０．１８mmとなる。EXAMPLE-1 A conventional pure copper strip having a thickness of 2.0 mm and a width of 40 mm was rolled with a conventional grooved roll 16 (both sides of the groove are cylindrical portions) as shown in FIG. 2 (a).
, The thickness difference Δt in the width direction of the rolled thin plate portion is 0.18 mm.
【００１７】薄板部幅２０mmでこの板厚差をなくすた
め、本発明の製造方法により２図（ｂ）に示すように溝
付ロ―ル１４の溝の両脇の円筒部にθ＝０．６５°のテ
―パ―加工はテ―パ―付溝付ロ―ル１４で圧延したとこ
ろ、薄板部の板幅方向での板厚分布が均一な異形断面条
が得られた。In order to eliminate this difference in plate thickness with a thin plate width of 20 mm, the manufacturing method of the present invention, as shown in FIG. When the taper at 65 ° was rolled by a tapered grooved roll 14, a profiled strip having a uniform thickness distribution in the width direction of the thin plate portion was obtained.
【００１８】実施例−２ 板厚２．０、板幅４５mmの純銅帯板を用い、図３（ｄ）
に示すように薄板部幅３０mmの異形断面条を製造する場
合は、図３（ａ）に示すように第１回目の溝付ロ―ル１
４ａ圧延では溝の両脇のテ―パ―角度θ＝０．９６°と
し、図１（ｂ）に示すように平ロ―ル１５ａ圧延を行
い、第２回目の溝付ロ―ル１４ｂ圧延では図３（ｃ）に
示すように溝の両脇のテ―パ―角度θ＝０．４２°とす
ることによって、薄板部のエッジ割れを防止し、第２平
ロ―ル１５ｂ圧延は図３（ｄ）に示すようにしてかつ薄
板部の板幅方向での板厚分布が均一な、薄板部幅３０mm
の異形断面条を得ることが出来た。Example 2 FIG. 3D shows a pure copper strip having a thickness of 2.0 and a width of 45 mm.
As shown in FIG. 3 (a), when manufacturing an irregularly shaped strip with a thin plate portion width of 30 mm, as shown in FIG.
In 4a rolling, the taper angle θ on both sides of the groove was set to 0.96 °, flat roll 15a rolling was performed as shown in FIG. 1 (b), and second grooved rolling 14b rolling was performed. Then, as shown in FIG. 3 (c), by setting the taper angle θ on both sides of the groove to 0.42 °, edge cracking of the thin plate portion is prevented, and the second flat roll 15b is rolled as shown in FIG. As shown in FIG. 3 (d), the sheet thickness distribution in the sheet width direction of the sheet part is uniform, and the sheet part width is 30 mm
Was obtained.
【００１９】実施例−３ 薄板部の断面形状が図４（ａ）に示すような薄板部幅２
０mm、薄板部厚が外側上がりのθ＝２°の勾配をもった
純銅の異形断面条を圧延する場合は、図２と同じ圧下条
件で但し溝付ロ―ルのテ―パ―角度θ＝２．６５°とす
ることによって得られる。EXAMPLE 3 The cross-sectional shape of the thin plate portion is 2 as shown in FIG.
In the case of rolling a strip of pure copper having a thickness of 0 mm and a slope of θ = 2 ° in which the thickness of the thin plate rises outward, under the same rolling conditions as in FIG. 2 except that the taper angle of the grooved roll θ = 2.65 °.
【００２０】実施例−４ 薄板部の断面形状が図４（ｂ）に示すような薄板部幅３
０mmで薄板部厚が外側上がりのθ＝１．５°の勾配をも
った純銅の異形断面条を圧延する場合は、図３と同じ圧
下条件で、第１の溝付ロ―ルのテ―パ―角度θ＝２．４
６°、第２の溝付ロ―ルのテ―パ―角度θ＝１．９２°
として第１の溝付ロ―ル圧延、平ロ―ル圧延、更に第２
の溝付ロ―ル圧延、平ロ―ル圧延をすることによって得
られる。EXAMPLE 4 The cross-sectional shape of the thin plate portion is 3 as shown in FIG.
In the case of rolling an irregularly shaped strip of pure copper having a thickness of 0 mm and a thickness of θ = 1.5 ° in which the thickness of the thin plate rises outward, under the same rolling conditions as in FIG. Par angle θ = 2.4
6 °, taper angle θ of the second grooved roll θ = 1.92 °
The first grooved roll rolling, flat roll rolling, and the second
And flat roll rolling.
【００２１】[0021]
【発明の効果】本発明の製造方法で製作した異形断面条
は例えば図５に示すように、従来の溝付ロ―ル圧延法に
よる異形断面条の圧延では、純銅、加工度７０％、薄板
部幅２０mmの場合で、薄板部の板幅方向の板厚差△ｔが
○で示すように大きく板幅方向の板厚差は０．０８mmに
もなっていたが、本発明の製造方法を用いることによっ
て、即ち、テ―パ―付き溝付ロ―ルで圧延したところ、
●で示すような均一な薄板部板厚を有する異形断面条を
得ることが出来た。As shown in FIG. 5, for example, as shown in FIG. 5, in the rolling of the deformed cross section by the conventional grooved roll rolling method, pure copper, a workability of 70%, and a thin plate are produced. In the case of the section width of 20 mm, the sheet thickness difference Δt in the sheet width direction of the thin plate portion was large as shown by ○, and the sheet thickness difference in the sheet width direction was as large as 0.08 mm. By using, that is, rolled with tapered grooved roll,
A profiled strip having a uniform thin plate thickness as shown by ● was obtained.
【００２２】また、溝付ロ―ル圧延及び平ロ―ル圧延を
繰返すことによって、薄板部幅の広い異形断面条を製造
しようとすると、図６に示すように従来の溝付ロ―ル圧
延法ではエッジ割れ不良が５２％も発生していたが、本
発明に用いるテ―パ―付溝付ロ―ルを用いることによっ
て８％まで低下させることが出来た。In order to produce a deformed cross section having a wide thin plate portion by repeating the grooved roll rolling and the flat roll rolling, as shown in FIG. 6, a conventional grooved roll rolling is performed. In the method, as much as 52% of the edge cracking defects occurred, but by using the tapered grooved roll used in the present invention, it could be reduced to 8%.
【図１】本発明の異形断面条の製造方法に用いるテ―パ
―付溝付ロ―ルの正面図（ａ）と薄板部の厚み差をなく
するために使用するテ―パ―θの選定値を、使用材料の
薄板部の圧延加工度および薄板部幅との関係で示す一例
の図表（ｂ1 ，ｂ2 ）。FIG. 1 is a front view of a tapered grooved roll used in the method for manufacturing a profiled cross-sectioned strip according to the present invention, and FIG. An example chart (b 1 , b 2 ) showing the selected values in relation to the rolling degree and the width of the thin plate portion of the used material.
【図２】本発明の実施例−１の説明のための、従来の方
法の場合（ａ）、本発明の方法の場合（ｂ）の溝付ロ―
ルを比較した正面図。FIGS. 2A and 2B are sectional views of a conventional method (a) and a method of the present invention (b) for explaining Example 1 of the present invention.
FIG.
【図３】本発明の製造方法によって薄板部幅の広い異形
断面条をエッジ割れなく圧延する順序（ａ）→（ｂ）→
（ｃ）→（ｄ）を示す正面図。FIG. 3 shows a sequence (a) → (b) → in which a deformed strip having a wide thin plate portion is rolled without edge cracking by the manufacturing method of the present invention.
The front view which shows (c) → (d).
【図４】本発明の製造方法によって製作できる応用製品
の横断面図。FIG. 4 is a cross-sectional view of an applied product that can be manufactured by the manufacturing method of the present invention.
【図５】本発明の製造方法の従来の製造方法に比較して
薄板部板厚分布の幅方向の改善効果を示すグラフ。FIG. 5 is a graph showing the effect of improving the thickness distribution of the thin plate portion in the width direction in comparison with the conventional manufacturing method of the manufacturing method of the present invention.
【図６】本発明の製造方法の従来の方法と比較して、エ
ッジ割れ改善効果を示す一例のパレット図。FIG. 6 is a pallet diagram of an example showing an effect of improving edge cracking as compared with the conventional method of the manufacturing method of the present invention.
【図７】従来の異形断面条製造工程における溝付ロ―ル
圧延工程を示す正面図（ａ）→（ｂ）→（ｃ）→
（ｄ）。FIG. 7 is a front view (a) → (b) → (c) → showing a grooved roll rolling process in a conventional process of manufacturing a deformed cross-section strip.
(D).
【図８】従来の薄板部幅の広い異形断面条の圧延変形の
横断面図（ａ）→（ｂ）→（ｃ）→（ｄ）。8 (a) → (b) → (c) → (d). FIG. 8 (a) → (b) → (c) → (d).
【図９】従来の薄板部のエッジドロップ（ａ）、とエッ
ジ割れ発生原因を示す横断面図（ｂ）。FIG. 9 is a cross-sectional view showing a conventional edge drop (a) of a thin plate portion and a cause of occurrence of an edge crack (b).
【図１０】従来の製造方法による薄板部板厚差△ｔの薄
圧部材料純銅（ａ）、純アルミニウム（ｂ）における加
工度と薄板部幅との関係を示す一例の図表。FIG. 10 is a table of an example showing the relationship between the working ratio and the width of a thin plate part in pure copper (a) and pure aluminum (b) with a thin plate part thickness difference Δt according to a conventional manufacturing method.
１ 金属帯板 ２ 溝の両脇の円筒部 ３ 薄板部 ５ 薄板部板幅方向での中立点 ６ エッジ部側に位置する材料の流れ ７ 厚板部 ８ 溝 ９ 湾曲した厚板部 １０ 異形断面条 １１ 薄板部のエッジ部 １２ 薄板部の段差部 １３ 薄板部の中央部 １４，１４ａ，１４ｂ テ―パ―付溝付ロ―ル １５，１５ａ，１５ｂ 平ロ―ル １６ 溝付ロ―ル DESCRIPTION OF SYMBOLS 1 Metal strip 2 Cylindrical part on both sides of groove 3 Thin part 5 Neutral point in the width direction of thin part 6 Material flow located on edge side 7 Thick part 8 Groove 9 Curved thick part 10 Irregular cross section Article 11 Edge portion of thin plate portion 12 Step portion of thin plate portion 13 Central portion of thin plate portion 14, 14a, 14b Roll with taper and groove 15, 15a, 15b Flat roll 16 Roll with groove
Claims (1)
を用いて圧延して、巾方向に板厚の異なる部分を長手方
向に連続して有する異形断面条を製造する方法におい
て、前記溝付ロ―ルの溝の両脇の円筒部を内側細りの勾
配にテ―パ―加工した溝付ロ―ルを用いて圧延すること
を特徴とする異形断面条の製造方法。1. A metal strip is rolled using a flat roll next to a grooved roll to produce a profiled strip having portions having different thicknesses in the width direction continuously in the longitudinal direction. Manufacturing a profiled section characterized in that the cylindrical portions on both sides of the groove of the grooved roll are rolled using a grooved roll tapered to an inside taper. Method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3025305A JP2734783B2 (en) | 1991-01-25 | 1991-01-25 | Manufacturing method of irregular cross section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3025305A JP2734783B2 (en) | 1991-01-25 | 1991-01-25 | Manufacturing method of irregular cross section |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04251626A JPH04251626A (en) | 1992-09-08 |
| JP2734783B2 true JP2734783B2 (en) | 1998-04-02 |
Family
ID=12162305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3025305A Expired - Lifetime JP2734783B2 (en) | 1991-01-25 | 1991-01-25 | Manufacturing method of irregular cross section |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2734783B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3724135B2 (en) * | 1996-10-31 | 2005-12-07 | 日立電線株式会社 | Manufacturing method of irregular cross section |
-
1991
- 1991-01-25 JP JP3025305A patent/JP2734783B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04251626A (en) | 1992-09-08 |
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