JPS5913501A - Method and device for slit rolling of angle iron - Google Patents
Method and device for slit rolling of angle ironInfo
- Publication number
- JPS5913501A JPS5913501A JP12048782A JP12048782A JPS5913501A JP S5913501 A JPS5913501 A JP S5913501A JP 12048782 A JP12048782 A JP 12048782A JP 12048782 A JP12048782 A JP 12048782A JP S5913501 A JPS5913501 A JP S5913501A
- Authority
- JP
- Japan
- Prior art keywords
- rolling
- roll
- billet
- stand
- slitter
- 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.)
- Granted
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
- B21B1/09—L-sections
-
- 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
- B21B1/0815—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 from flat-rolled products, e.g. by longitudinal shearing
-
- 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
- B21B1/12—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 in a continuous process, i.e. without reversing stands
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B15/0007—Cutting or shearing the product
- B21B2015/0021—Cutting or shearing the product in the rolling direction
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は山形鋼のスリット圧延方法およびその装置に係
シ、特に条鋼圧延設備によシ生産性の向上および省エネ
ルギ対策上有効な山形鋼のスリット圧延方法およびその
装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for slit rolling angle steel, and in particular to a method and apparatus for slitting angle steel, which are effective in improving productivity and saving energy in long steel rolling equipment. Regarding.
従来、山形鋼の製造における圧延は、圧延機がタンデム
装置の場合、一部棒鋼の圧延に用いられている２ストラ
ンド圧延力式を除き大多数が１ストランド圧延力式によ
っている。Conventionally, when the rolling mill used in the production of angle iron is a tandem device, the majority of rolling methods have been carried out using a one-strand rolling force method, with the exception of the two-strand rolling force method used for rolling some steel bars.
■ストランド圧延力式では、圧延速度によシ圧延能率が
制約されるため、能率向上を図るにば２ストランド以上
の圧延を行なえばよいが、この場合、圧延に要する動力
が〔ｌストランド当りの所要動力×ストランド数〕とな
るため、電動機、減速機等の容量が犬きくなシ、圧延荷
重も〔１ストランド当シの荷重×ストランド数〕となる
ので、圧延機自体も大型になるなど、設備費、維持費が
嵩み、経済的負担が大きくなる。■With the strand rolling force method, rolling efficiency is limited by rolling speed, so rolling two or more strands is sufficient to improve efficiency, but in this case, the power required for rolling is [per 1 strand]. Required power x number of strands], so the capacity of the electric motor, speed reducer, etc. is too large, and the rolling load is also [load per strand x number of strands], so the rolling mill itself becomes large. Equipment costs and maintenance costs will increase, resulting in a heavy economic burden.
一方、前記棒鋼圧延における２ストランド圧延力式もＩ
スタンド責ｌパス）からの完全２ストランド圧延ではな
く、交互または不完全な２ストランド圧延力式か、ある
いは中間スタンドからの２ストランド圧延力式である。On the other hand, the two-strand rolling force formula for steel bar rolling is also I
Instead of complete two-strand rolling from a stand (one pass), it is an alternating or incomplete two-strand rolling force type, or a two-strand rolling force type from an intermediate stand.
しかして上記のような２ストランド圧延力式を山形鋼の
圧延に適用しようとしても、■スタンド（ｌパス）から
２ストランド圧延する場合、設備容量も約２倍近いもの
が必要となシ、また品質面においても、各パス毎の断面
形状、または引張９等を各ストランドとも同一にするこ
とは、ロールのたわみや摩耗等によって著しく困難であ
る。したがってこの場合には、粗圧延のみを同一ロール
の２ストランド圧延を行ない、設備費用は嵩んでも仕上
げ圧延は各ストランド毎に圧延機およびその駆動装置を
配備して品質を確保することが必要となる。However, even if we try to apply the two-strand rolling force formula described above to the rolling of angle iron, if we roll two strands from a stand (l-pass), the equipment capacity will need to be nearly twice as large. In terms of quality, it is extremely difficult to make the cross-sectional shape or tension 9 the same for each pass due to deflection and wear of the rolls. Therefore, in this case, it is necessary to perform only rough rolling by rolling two strands of the same roll, and for finish rolling, it is necessary to install a rolling mill and its drive device for each strand to ensure quality, even though the equipment cost is high. Become.
本発明はこれに鑑み、従来の圧延設備に少ない設備の付
加と維持費によシ高品質の山形鋼を生産することができ
るスリット圧延における山形鋼のスリット圧延方法およ
びその装置を提供することを目的としてなされたもので
、ビレットの圧延工程により断面扁平矩形状に圧延し、
その長手方向中央部に凹溝を形成してスリッタ直前の圧
延ロールの孔型により山形台形状が連なる断面を有する
二連山形台形状に成形し、この山形台形の連続部分をス
リッタにより切断して、以後の２ストランド領域におい
て山形鋼に成形することを特徴とするものである。これ
により切断された各ビレットが直ちに後流側のロールに
よシそれぞれ山形鋼状の成形に移行するようにしたもの
であシ、これによシ圧延スタンドの比較的後流側におい
て切断しても、前記のように切断時の断面形態が山形台
形をなすので切断後の複数ストランド部分のスタンド数
が少くして十分なる高品質の山形鋼が得られ、従来のス
リット圧延方式に基づくものに比し設備や駆動装置類の
小規模な追加によって目的を十分に達成することができ
る。In view of this, it is an object of the present invention to provide a method and apparatus for slitting angle steel in slit rolling, which can produce high quality angle steel with less addition of equipment and maintenance costs to conventional rolling equipment. It was made for the purpose of rolling billets into a flat rectangular cross-section through the rolling process.
A concave groove is formed in the central part in the longitudinal direction, and the shape of the rolling roll immediately before the slitter is used to form a double chevron trapezoid shape having a cross section in which the chevron trapezoids are connected, and the continuous part of the chevron trapezoid is cut by a slitter. , is characterized in that the subsequent two strand regions are formed into angle iron. As a result, each cut billet is immediately transferred to the rolls on the downstream side to be formed into angle iron shapes. As mentioned above, since the cross-sectional form when cut is a trapezoidal angle, the number of stands in the multi-strand portion after cutting is reduced to obtain a sufficiently high quality angle steel, and this method is similar to that based on the conventional slit rolling method. In contrast, the objective can be fully achieved by adding small-scale equipment and drive devices.
以下、本発明を図面に示す実施例を参照して説明する。The present invention will be described below with reference to embodiments shown in the drawings.
第１図は本発明を実施するに用いる圧延装置の一例を示
すもので、加熱炉ｌから出たビレットを搬送する搬送経
路上に３群のスタンド２． ３． ４が直列に配設され
、その後流に冷却床５、ラインアウトテーブル６等が配
設されている。FIG. 1 shows an example of a rolling apparatus used to carry out the present invention, in which three groups of stands 2. 3. 4 are arranged in series, and a cooling bed 5, a line-out table 6, etc. are arranged downstream thereof.
第１スタンド群２は第１番目から第５番目までのスタン
ドを備え、第２スタンド群３は第６番目から第９・番目
のスタンドを備え、第３スタンド群４は第１０番目から
第１５番目のスタンドを備えており、各スタンドのロー
ルの孔型は、第２図１〜１５に示すように、第１゛スタ
ンドから第６スタンドまでは扁平な矩形状であυ、第７
スタンドにおいて逆台形状とされ１第８〜第１０スクン
ドにおいてビレットの長手方向中央部に切り婢状の凹溝
７が形成される形状とされ、第１１スタンドの出側にス
リッタ１】が設けられるものである。上記第８スタンド
から第１１スタンドまで′の孔型の詳細列は第３図Ａ
−Ｅに示している。The first stand group 2 includes the 1st to 5th stands, the second stand group 3 includes the 6th to 9th stands, and the third stand group 4 includes the 10th to 15th stands. The hole shape of the roll of each stand is a flat rectangular shape from the first stand to the sixth stand, and the hole shape of the roll of each stand is a flat rectangular shape.
The stand has an inverted trapezoidal shape, and the 8th to 10th scunds have a cut-shaped groove 7 formed in the longitudinal center of the billet, and a slitter 1 is provided on the exit side of the 11th stand. It is something. The details of the holes from the 8th stand to the 11th stand are shown in Figure 3A.
- Shown in E.
上記スリッタ１１の直前に位置するスタンド（図示実施
列では第１１スタンド）の上下のロール８゜９による孔
型１０は、第４図に拡大して示すように、各部の寸法、
角度は下記の通りとなっている。The hole mold 10 formed by the upper and lower rolls 8°9 of the stand located immediately in front of the slitter 11 (the 11th stand in the illustrated row) has the dimensions of each part, as shown in an enlarged view in FIG.
The angle is as follows.
α＝５０〜８８（実施列では ７１０３０’）７７ ＝
’（４０°〜８０°） （同 ６０°
）θ＝（５°〜４０° ） （同 ２０
° ）Ｂ＝（０〜０．５ ）×Ｄ （同 ０．
２４ ）Ｃ＝０．５〜３．０（同 １．３）
すなわち下部ロール９の孔型を構成する局面軸方向中央
部に周方向に形成された小突条１２と、上部ロール８の
孔型を構成する周面の軸方向中央部に前記小突条１２に
対向するよう周方向に形成された突条１３とで、山形台
形が隣在する二連山形台形状の孔型１０が形成されたも
のである。α=50~88 (71030' in the actual column) 77 =
'(40°~80°) (60°
)θ=(5°~40°) (same 20
° )B=(0~0.5)×D(same 0.
24) C=0.5-3.0 (same as 1.3)
That is, a small protrusion 12 formed in the circumferential direction at the center in the axial direction of the curve forming the hole shape of the lower roll 9, and a small protrusion 12 formed in the axial direction center of the circumferential surface forming the hole pattern of the upper roll 8. The protrusions 13 are formed in the circumferential direction so as to face each other, thereby forming a hole 10 in the shape of two trapezoids with adjacent trapezoids.
上記値において、β〉８０°まだはθく５°では、スリ
ット部がシャープになり、ロールが欠損しやすくなり、
β＜４０°またはσ〉４００では、スリット部が緩やか
すぎて分割されにくくなる。またＢ＞０，５Ｄであると
上記前者と同様な結果となシ、Ｂ（０であると上記前者
と同様になる。さらにＣ＜０．５では、突条部分に異常
な圧力が掛シ、ロールの欠損を招くシ、また実作業上ロ
ール隙間の調整ができなくなる。そしてＣ〉３では、ス
リット性が低下し、スリット時のぎざぎざ部分が多くな
って、いわゆる線状疵や折れ込み等の圧延不良を生じる
。In the above values, when β>80° and θ<5°, the slit becomes sharp and the roll is easily damaged.
When β<40° or σ>400, the slit portion is too loose and difficult to divide. If B > 0.5D, the result will be the same as the former, and if B (0), the result will be the same as the former.Furthermore, if C In case of C>3, the slitting performance deteriorates and there are many jagged parts during slitting, resulting in so-called linear flaws and folds. This results in rolling defects.
上記山形鋼への圧延に際し断面減少率（減面率）は５〜
３５％程度が実際上の適当範囲であυ、これより小さい
と圧縮不足となって幅方向への延伸不良となシ、足先に
相当する部分が欠肉状態となって「足先き不良」になっ
たり、頂上部に相当する部分が欠肉状態となって「山倒
れ」となる。また第１１番目のスタンドにおいては、小
突条が欠損しやすい。そのため上記スタンドにおいては
断面減少率を上限２０係に留め、下限は５係とすること
が望ましい。まだ第１２番目のスタンドにおいては、断
面減少率を２３係以上とすることが望ましい。これは造
形に入る場合、上記値以下であると、山形鋼の左右の孔
型への材料の充満性が悪いためと、スリットした部分の
隅を消すためである。上限は３５％とすることが好まし
い。When rolling into the above angle iron, the area reduction rate (area reduction rate) is 5 ~
Approximately 35% is actually an appropriate range υ; if it is smaller than this, there will be insufficient compression, resulting in poor stretching in the width direction, and the part corresponding to the toe will be under-filled, resulting in "poor toe grip". ”, or the part corresponding to the top becomes thin and the mountain collapses. Furthermore, in the 11th stand, the small protrusions are likely to be damaged. Therefore, in the above-mentioned stand, it is desirable that the cross-sectional reduction rate be kept at an upper limit of 20 factors and a lower limit of 5 factors. In the 12th stand, it is desirable that the area reduction ratio be 23 factors or more. This is because if the value is less than the above value when starting modeling, the filling of the material into the left and right holes of the angle iron will be poor, and the corners of the slit portions will be erased. The upper limit is preferably 35%.
上記の孔型１０によシ圧延されたビレット１４は第５図
に示しているように、山形台形状断面が連なった形状と
なり、その連なった部分１４ａがスリッタ１ｊにより切
断される。As shown in FIG. 5, the billet 14 rolled by the groove die 10 has a shape in which a series of chevron-shaped trapezoidal cross sections are formed, and the continuous portion 14a is cut by the slitter 1j.
上記スリッタ１１ば、第５図に示すように、上ロール１
５と下ロール１６とからなり、上ロール１５には５００
乃至それに近い角度γを有する切断刃エフが周方向に突
設され、下ロール１６はフラットなロールとされている
。そして前記切断刃１７の先端と下口、−ル１６の周面
との間隙ｍは１．０Ｘ程度とされている。The slitter 11 has an upper roll 1 as shown in FIG.
5 and the lower roll 16, and the upper roll 15 has 500 rolls.
A cutting blade F having an angle γ at or close to the angle γ is provided to protrude in the circumferential direction, and the lower roll 16 is a flat roll. The gap m between the tip of the cutting blade 17 and the lower opening and the circumferential surface of the loop 16 is approximately 1.0X.
上面のスリッタ１】により切断されるビレット１４は断
面が山形台形状に２分され、上記切断刃１７の角度γに
より切断側の側面１４ｂも他側面１−４０とほぼ同角度
をなす傾斜面となり、第１２スタンド乃至第１５スタン
ドにおける２ストランド領域においてそれぞれ山形鋼に
成形される。The billet 14 cut by the upper slitter 1 is divided into two halves with a trapezoidal cross-section, and due to the angle γ of the cutting blade 17, the side surface 14b on the cutting side also becomes an inclined surface having almost the same angle as the other side surface 1-40. , the two-strand regions in the 12th to 15th stands are each formed into angle iron.
寿お、本発明における圧延ロールの孔形の二連山形台形
状については、スリット後の２ストランド圧延上、最も
好ましい断面形状に選択し得゛るものであシ、必ずしも
図示の形状に特定されるものではない。Regarding the trapezoidal shape of the holes of the rolling roll in the present invention, it can be selected as the most preferable cross-sectional shape for rolling the two strands after slitting, and the shape is not necessarily specified as shown in the drawings. It's not something you can do.
以上説明したように、本発明においては、スリット切断
する直前のロール孔型によシ山形台形断面が連接される
形状に成形し、その連接部分をスリッタによシ切断して
、以後の２ストランド領域において山形鋼に圧延するよ
うＫしたので、圧延スタンドの後流側でのスリットを行
なっても少ない２ストランド領域において十分に山形鋼
の成形ができ、ロールおよびその駆動装置を含む設備が
小規模の付加で足シ、経済的にスリット圧延による山形
鋼の生産を行なうことができる。またスリッタは上ロー
ルのＶ形断面形状の切断刃と下ロールのフラットはロー
ル面との間で前記ビレットの連接部分を切断するので、
従来の凹凸刃の嵌合により切断するものに比し高温のビ
レットに接触する接触面積が著しく減少し、スリットロ
ールが受ける熱影響に対する対策も容易であるなどの優
れた利点があム加えてビレットが孔型によυ山形台形断
面が寸法精度よく造形されることから、疵や折れ込みが
生じに＜＜、品質の優れた山形鋼を得ることができるな
どの種々の効果がある。As explained above, in the present invention, the roll hole mold immediately before slitting is formed into a shape in which the trapezoidal cross sections are connected, and the connected portion is cut by the slitter to form the subsequent two strands. Since the angle iron is rolled into the angle iron in the area, even if slitting is performed on the downstream side of the rolling stand, the angle iron can be sufficiently formed in the two-strand area, which is small, and the equipment including the rolls and their drive device is small-scale. With the addition of this method, angle-shaped steel can be economically produced by slit rolling. In addition, the slitter cuts the connected portion of the billet between the V-shaped cutting blade of the upper roll and the flat roll surface of the lower roll.
Compared to the conventional method that cuts by fitting a concave and convex blade, the contact area that comes into contact with the high-temperature billet is significantly reduced, and it is easy to take countermeasures against the effects of heat on the slitting roll. Since the trapezoidal cross section is formed with high dimensional accuracy by the hole mold, there are various effects such as being able to obtain angle steel of excellent quality without causing flaws or bending.
第１図は本発明を適用する圧延装置の一例を示す側面図
、第２図は圧延ラインの各スタンドのロール孔型を示す
説明図、第３図Ａ −Ｆｉは第７スタンド乃至第１１ス
タンドのロール孔型の詳細を示す説明図、第４図は第１
２スタンドの孔型の詳細図、第５図はスリッタの説明図
である。
１・・・加熱炉、２・・・第１スタンド群、３・・・第
２スタンド群、４・・・第３スタンド群、８，９・・・
ロール、１０・・・孔型、１１・・・スリッタ、１２・
・・小突条、工３・・・突条、１４・・・ビレツ）、１
５．１６・・・ロール、１７・・・切断刃。
出願人代理人 猪 股 清
第２図
第、５図Fig. 1 is a side view showing an example of a rolling apparatus to which the present invention is applied, Fig. 2 is an explanatory diagram showing the roll hole type of each stand of the rolling line, and Fig. 3 A-Fi shows the 7th stand to the 11th stand. An explanatory diagram showing the details of the roll hole type, FIG.
A detailed view of the hole shape of the two stands, and FIG. 5 is an explanatory view of the slitter. DESCRIPTION OF SYMBOLS 1... Heating furnace, 2... 1st stand group, 3... 2nd stand group, 4... 3rd stand group, 8, 9...
Roll, 10... Hole type, 11... Slitter, 12.
... small protrusion, work 3... protrusion, 14... billet), 1
5.16...roll, 17...cutting blade. Applicant's agent Kiyoshi Inomata Figures 2 and 5
Claims (1)
り断面扁平矩形状に圧延し、その長手方向中央部に凹溝
を形成してスリッタ直前の圧延ロールの孔型によシ山形
台形状が連なる断面を有する二連山形台考状に成形し、
この山形台形の連続部分をスリッタによシ切断して、以
後の２ストランド領域において山形鋼に成形することを
特徴とする山形鋼のスリ・ット圧延方法。 ２）断面扁平矩形状に圧延されたビレットを切断する直
前の圧延ロールの一方のロールを孔型中央部周方向に小
突条を有するフラットな形状とし、他方のロールを前部
小突条に対応する突条により山形台形状が隣在する孔形
形犬とし、この孔形を有する圧延ロールを圧延ラインの
スリッタの直前に配設したことを特徴とする山形鋼のス
リット圧延装置。 ３）前記孔型の内側面とフラットなロール面とのなす角
度を４０°〜８０°とし、前記小突条の高さを孔型の深
さの７２以下とし、さらにスリット前における突条と小
突条との間隙を０．５〜３．０晒とし、小突条の両側傾
斜面の角度を５〜４０゜とした特許請求の範囲第２項記
載の山形鋼のスリット圧延装置。[Claims] 1) In slitting and rolling, the billet is rolled into a flat rectangular cross section in the rolling process, and a concave groove is formed in the center of the billet in the longitudinal direction to change the hole shape of the rolling roll immediately before the slitter. It is formed into a double trapezoidal shape with a cross section that is a series of chevron trapezoids,
A slit rolling method for angle iron, characterized in that the continuous portion of the trapezoid is cut by a slitter, and the subsequent two strand regions are formed into angle iron. 2) Immediately before cutting the billet rolled into a flat rectangular cross-sectional shape, one roll of the rolling rolls is made into a flat shape with small protrusions in the circumferential direction at the center of the hole, and the other roll is made into a small protrusion at the front part. 1. A slitting device for angle iron, characterized in that the dog has a hole shape in which trapezoidal shapes are adjacent to each other by corresponding protrusions, and a rolling roll having this hole shape is disposed immediately before a slitter in a rolling line. 3) The angle between the inner surface of the groove and the flat roll surface is 40° to 80°, the height of the small protrusion is 72 or less than the depth of the groove, and the protrusion before the slit is 3. The angle iron slitting device according to claim 2, wherein the gap between the small protrusions and the small protrusions is 0.5 to 3.0 degrees, and the angles of the inclined surfaces on both sides of the small protrusions are 5 to 40 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12048782A JPS5913501A (en) | 1982-07-13 | 1982-07-13 | Method and device for slit rolling of angle iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12048782A JPS5913501A (en) | 1982-07-13 | 1982-07-13 | Method and device for slit rolling of angle iron |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5913501A true JPS5913501A (en) | 1984-01-24 |
| JPS6246241B2 JPS6246241B2 (en) | 1987-10-01 |
Family
ID=14787396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12048782A Granted JPS5913501A (en) | 1982-07-13 | 1982-07-13 | Method and device for slit rolling of angle iron |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5913501A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52116762A (en) * | 1976-02-09 | 1977-09-30 | Co Steel Int | Method of cleaving multiiwire metal bar |
| JPS5433252A (en) * | 1977-08-19 | 1979-03-10 | Nippon Kokan Kk <Nkk> | Simultaneous production method of plural pieces of shape steels |
-
1982
- 1982-07-13 JP JP12048782A patent/JPS5913501A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52116762A (en) * | 1976-02-09 | 1977-09-30 | Co Steel Int | Method of cleaving multiiwire metal bar |
| JPS5433252A (en) * | 1977-08-19 | 1979-03-10 | Nippon Kokan Kk <Nkk> | Simultaneous production method of plural pieces of shape steels |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6246241B2 (en) | 1987-10-01 |
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