JPH1147804A - Method for rolling special shaped steel bar - Google Patents
Method for rolling special shaped steel barInfo
- Publication number
- JPH1147804A JPH1147804A JP20172997A JP20172997A JPH1147804A JP H1147804 A JPH1147804 A JP H1147804A JP 20172997 A JP20172997 A JP 20172997A JP 20172997 A JP20172997 A JP 20172997A JP H1147804 A JPH1147804 A JP H1147804A
- Authority
- JP
- Japan
- Prior art keywords
- roll
- rolling mill
- rolling
- rolled
- steel bar
- 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.)
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Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、コンクリートに埋
めこまれる鉄筋等に使用される異形棒鋼を得るための圧
延方法に関し、特に、優れた曲げ加工性を示す4条リブ
異形棒鋼の寸法精度を向上させ得る圧延方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rolling method for obtaining a deformed steel bar used for a reinforcing bar or the like embedded in concrete, and more particularly, to a method for improving the dimensional accuracy of a four-rib rib deformed steel bar exhibiting excellent bending workability. It relates to a rolling method that can be improved.
【0002】[0002]
【従来の技術】一般の異形棒鋼は、図1(a)に示すよ
うに丸棒材の周面に所定の節2と二条の縦方向のリブ3
とを形成したものである。節2およびリブ3を除いた部
分(自由面)5の直径D、節2の高さt、軸方向で隣合
う節2間の距離L、リブ3の幅dがJIS規格により定
められており、特に、節2の高さtについては、その許
容範囲は厳しく設定されている。これに対して、図1
(b)に示すような縦リブ3を四条有する4条リブ異形
棒鋼1が知られている。4条リブ異形棒鋼は、一般的な
2条リブ異形棒鋼に比べて使用時の曲げ加工におけるね
じれや曲がりの発生がなく、加工性に優れた特性をも
つ。2. Description of the Related Art As shown in FIG. 1 (a), a general deformed steel bar has a predetermined joint 2 and two vertical ribs 3 on a peripheral surface of a round bar.
Are formed. The diameter D of the portion (free surface) 5 excluding the node 2 and the rib 3, the height t of the node 2, the distance L between the nodes 2 adjacent in the axial direction, and the width d of the rib 3 are defined by JIS standards. In particular, the allowable range of the height t of the node 2 is strictly set. In contrast, FIG.
A four-ribbed deformed steel bar 1 having four longitudinal ribs 3 as shown in (b) is known. The four-rib deformed bar does not have torsion or bending in bending during use as compared with a general two-rib deformed bar, and has excellent workability.
【0003】この種の4条リブ異形棒鋼の圧延方法とし
て、本出願人は、最終仕上げ圧延を4ロール圧延機によ
り行う方法を先に提案した(特開平7−32330
2)。このものは、図2に示すような二個一対のロール
R1,R2 とR3,R4 とを直交状に配設したもので、最終
仕上パスを形成する各仕上ロールR1 〜R4 には、断面
円弧状の周溝6に、図3に示すような周方向に沿って所
定間隔の節溝7が形成してある。この仕上ロールR1 〜
R4 のロール隙きによるラウンド孔型8に、上流側の圧
延機列によって断面円形に圧延された被圧延素材を通し
て圧下し、その周面に節2を形成する。同時に、隣接す
る各ロールの間隙への噛みだしにより四条のリブ3が形
成される。As a method for rolling this type of 4-rib deformed steel bar, the present applicant has previously proposed a method in which the final finish rolling is performed by a four-roll rolling mill (Japanese Patent Laid-Open No. 7-32330).
2). This compound, two pair of rolls R 1, as shown in FIG. 2, R 2 and R 3, in which is disposed a R 4 to orthogonally, the finishing roll R 1 to R to form a final finish path In FIG. 4, a nodal groove 7 is formed at a predetermined interval along a circumferential direction as shown in FIG. This finishing roll R 1 ~
Round caliber 8 by-out roll gap of R 4, the rolling mill train on the upstream side and pressure through the rolled material is rolled into a circular cross section, to form the section 2 on its peripheral surface. At the same time, four ribs 3 are formed by biting the adjacent rolls into the gap.
【0004】[0004]
【発明が解決しようとする課題】周溝6に節溝7を有す
る四個の仕上ロールR1 〜R4 で断面円形の素材を直交
する二方向から圧延して異形棒鋼を製造する場合、節2
のない自由面5は当然圧下量が大きいから、その減面率
に比例して材料は長手方向へ伸びようとする。そのた
め、本来ならロール節溝7へ供給されて節2となるべき
部分の材料の肉が伸びによって取られてしまうことにな
る。そこで、いま、図4に示すように、対向するロール
R1,R2 (R3,R4 )の節溝7の溝底(節の頭)7a間
の径L7aとほぼ等しい外径の丸棒素材である被圧延材S
を仕上ロールR1 〜R4 で圧下すると、ロール節溝7へ
の材料充満度が不足してしまい、肉引け(プルダウン)
となって節高さtが小さくなる。When producing a deformed steel bar by rolling a material having a circular cross section from two orthogonal directions using four finishing rolls R 1 to R 4 having a nodal groove 7 in a circumferential groove 6. 2
Since the free surface 5 having no surface has a large amount of reduction, the material tends to extend in the longitudinal direction in proportion to the reduction in area. Therefore, the portion of the material that would otherwise be supplied to the roll node groove 7 to become the node 2 is removed by elongation. Therefore, now, as shown in FIG. 4, the outer diameter approximately equal to the diameter L 7a between opposing rolls R 1, R 2 groove bottom (section head) of Fushimizo 7 (R 3, R 4) 7a Rolled material S which is a round bar material
Is rolled down by the finishing rolls R 1 to R 4 , the material filling degree of the roll joint grooves 7 becomes insufficient, and the meat is pulled down (pull-down).
And the node height t becomes smaller.
【0005】そこで節溝7の充満度を十分とするべく被
圧延材Sの入側径を前記L7aより大きくすると、ロール
節溝7への充満度は十分になるが、隣接ロール間の隙間
に噛みだして形成されるリブ3部分が節溝7の底部より
外方へはみ出してリブ3の外径が節2の外径より大きく
なる。したがって、製品寸法のバラツキ範囲が大きかっ
た。[0005] If the entry side diameter of the material S to be rolled is made larger than the above-mentioned L 7a in order to make the degree of filling of the groove 7 sufficient, the degree of filling of the roller groove 7 becomes sufficient, but the gap between adjacent rolls is increased. Of the rib 3 protrudes outward from the bottom of the node groove 7, and the outer diameter of the rib 3 becomes larger than the outer diameter of the node 2. Therefore, the range of variation in product dimensions was large.
【0006】本発明は、このような従来技術の課題を解
決するためになされたものであり、ロール節溝への充満
度を満足させると同時に、リブ外径の過剰な噛みだしを
防止することにより、寸法精度の極めて高い異形棒鋼が
得られる圧延方法を提供することを目的とする。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and is intended to satisfy the degree of filling of the roll joint groove and to prevent excessive biting of the rib outer diameter. Accordingly, an object of the present invention is to provide a rolling method capable of obtaining a deformed steel bar having extremely high dimensional accuracy.
【0007】[0007]
【課題を解決するための手段】上記の目的を達成するた
めに、本発明に係る異形棒鋼の圧延方法は、線材・棒材
の連続圧延機の少なくとも最終仕上圧延機に4ロール圧
延機を配し、該圧延機のロール孔型の円周方向に所定間
隔に形成した節溝で、ほぼ丸断面形状の被圧延材の表面
に節を成形する異形棒鋼の圧延方法において、前記4ロ
ール圧延機とその直前の圧延機間の被圧延材に0.2〜
1.2kgf/mm2 の張力を付与することを特徴とす
る。In order to achieve the above-mentioned object, a method for rolling deformed steel bars according to the present invention comprises a four-roll rolling mill at least as a final finishing mill among continuous rolling mills for wire rods and bars. The method of rolling a deformed steel bar in which a knot is formed on a surface of a material to be rolled having a substantially round cross-section with knot grooves formed at predetermined intervals in a circumferential direction of a roll hole die of the rolling mill. And the material to be rolled between the rolling mills
It is characterized by applying a tension of 1.2 kgf / mm 2 .
【0008】[0008]
【発明の実施の形態】以下、本発明の実施形態を図面を
参照して説明する。図5に、この実施形態において採用
したパススケジュールの一例を示す。先ず、断面が正方
形の母材Sを、粗圧延機群のフラットロールF1 〜F6
により圧下方向を鉛直方向と水平方向とに交互に変えな
がらカリバレス圧延することにより、母材断面積を徐々
に小さくしていく。続いて、中間圧延機群および仕上げ
圧延機群のオーバル孔型O1 〜O4 とラウンド孔型r1
〜r4 とで交互に鉛直方向と水平方向とから圧下し、最
後に4ロール圧延機からなる最終仕上圧延機のラウンド
孔型r5 で、節溝を備えた二対四個のロールにより直交
する二方向から圧延して、図1(b)に示したような周
面に節2と4条リブ3を形成した異形棒鋼1を製造す
る。Embodiments of the present invention will be described below with reference to the drawings. FIG. 5 shows an example of the path schedule adopted in this embodiment. First, a base material S having a square cross section is flat rolls F 1 to F 6 of a rough rolling mill group.
By carrying out caliber-less rolling while alternately changing the rolling direction between the vertical direction and the horizontal direction, the cross-sectional area of the base material is gradually reduced. Subsequently, the intermediate mill group and finishing mill group oval grooved O 1 ~ O 4 and round caliber r 1
And pressure from the vertical direction and the horizontal direction alternately with ~r 4, finally a final finishing mill of round grooved r 5 of four rolling mill, quadrature by two pairs four rolls having a Fushimizo By rolling from two directions, a deformed steel bar 1 having the joints 2 and the four ribs 3 formed on the peripheral surface as shown in FIG.
【0009】このとき、最終仕上圧延機として配設した
4ロール圧延機(ラウンド孔型r5)とその直前の圧延
機(ラウンド孔型r4 )間の被圧延材に敢えて張力を付
与する。その張力付与は、各圧延機を専用のモータで駆
動する単独駆動方式でそれら両圧延機のロール回転数を
調整して行っても、複数スタンドが駆動モータを共有す
る共通駆動方式でロール間隙調整のみで行っても良い
が、より精密な寸法精度の保証という面からは単独駆動
方式が好ましい。例えばロードリレーまたは圧延中のモ
ータ負荷電流値によりモータの回転を調整することによ
り、最終仕上圧延機とその直前圧延機との間で被圧延材
に付与する張力を迅速且つ微細に制御しつつ圧延するこ
とが可能である。At this time, tension is intentionally applied to the material to be rolled between the four-roll rolling mill (round hole type r 5 ) provided as the final finishing mill and the immediately preceding rolling mill (round hole type r 4 ). Even if the tension is applied by adjusting the number of rolls of both rolling mills by a single drive system in which each rolling mill is driven by a dedicated motor, the roll gap is adjusted by a common drive system in which a plurality of stands share a drive motor. Although it may be carried out only by itself, a single drive system is preferable from the viewpoint of assuring more precise dimensional accuracy. For example, by adjusting the rotation of the motor according to a load relay or a motor load current value during rolling, the tension applied to the material to be rolled between the final finishing rolling mill and the immediately preceding rolling mill is quickly and finely controlled while controlling the tension. It is possible to
【0010】最終仕上げ用の4ロール圧延機の圧延ロー
ルR1 〜R4 には、図3に示すロールR1 ,R2 と同様
に、ロール周面に断面円弧状の周溝6が形成され、この
周溝6の溝面に周方向に垂直に所定の幅で節溝7が所定
間隔を保って刻まれている。[0010] The rolling roll R 1 to R 4 of the four-roll rolling mill for final finishing, like the roll R 1, R 2 shown in FIG. 3, arcuate cross section circumferential groove 6 on the roll circumferential surface is formed A nodal groove 7 is formed on the groove surface of the circumferential groove 6 at a predetermined width at a predetermined interval in a direction perpendicular to the circumferential direction.
【0011】このような孔型を有する4ロール圧延機の
二対四個の圧延ロールR1 〜R4 で形成されるロール隙
き8(すなわちラウンド孔型r5 )の入り側の被圧延材
Sに、張力を付与しつつ圧延ロールR1 〜R4 で圧下す
る。この場合、直前圧延機のラウンド孔型r4 から供給
される被圧延材Sは、図6に示すように断面ほぼ丸形で
ある。その被圧延材外径Hは、4ロール圧延機の圧延ロ
ールR1 〜R4 の節溝7の溝底7aで形成される円形断
面の直径(以下、「節頭径」という)L7a以上とする。[0011] inlet side of the rolled material such two pairs four of the rolling four-roll rolling mill having grooved roll R 1 to R roll gap-out 8 is formed by 4 (i.e. round caliber r 5) S is reduced by rolling rolls R 1 to R 4 while applying tension. In this case, the rolled material S fed from the round hole type r 4 immediately before the rolling mill is a cross-sectional substantially round shape as shown in FIG. The outer diameter H of the material to be rolled is equal to or larger than the diameter (hereinafter referred to as “knot head diameter”) L 7a of a circular section formed by the groove bottom 7a of the knot groove 7 of the rolling rolls R 1 to R 4 of the four-roll mill. And
【0012】このようにラウンド孔型r5 に通す被圧延
材Sの外径Hがロール孔型の節頭径L7aより大きい場合
に、その被圧延材Sに張力を付与した状態で圧延ロール
R1〜R4 で圧下すると、被圧延材Sは圧下による長手
方向への伸びに引張応力による伸びが加わって、その外
径が張力付与のない場合より大きく減径しながら圧延さ
れる。しかし、その外径が大きい分、余分に材料がロー
ル孔型の節溝7内に供給されるから、ラウンド孔型r5
の節溝7への充満度は良好であり大きなプルダウンは生
じない。そのため、製品異形棒鋼1の節高さtが小さく
なることがなく、真円度も良好である。As described above, when the outer diameter H of the material S to be passed through the round hole type r 5 is larger than the node diameter L 7a of the roll hole type, the rolling material S is tensioned. with reduction in R 1 to R 4, the rolled material S is subjected to any elongation due to tensile stress elongation in the longitudinal direction by the pressure, the outer diameter is rolled while increasing reduced diameter than the absence of tensioning. However, since the extra material is supplied into the roll groove type groove 7 due to the large outer diameter, the round hole shape r 5
The filling degree of the nodal groove 7 is good, and a large pull-down does not occur. Therefore, the nodal height t of the product deformed steel bar 1 does not decrease, and the roundness is good.
【0013】一方、非圧延部分である隣合う各圧延ロー
ルR1 〜R4 同士の隙間部分には被圧延材Sが噛みだし
て異形棒鋼のリブ3が形成されていく(図6)。この噛
みだし10は、製品異形棒鋼のリブ外径寸法L3 を規定
するもので、圧下力が負荷されないため被圧延材Sの外
径Hに相当する量となる。したがって張力を付与せずに
そのまま圧延すると、製品の異形棒鋼は図7に示すよう
にリブ外径L3 が節外径L2 より大きくなってしまう。
しかし、本発明の方法では張力を付与しつつ圧延するこ
とにより、ラウンド孔型r5 へ供給される入側被圧延材
Sの外径Hの減径率(もとの外径Hに対する減径量の割
合)がより大きくなり、そのためリブ3の噛みだし10
も減少する結果、図8に示すように製品異形棒鋼1のリ
ブ外径L 3 が節外径L2 と等しくなる。On the other hand, each adjacent rolling row which is a non-rolling portion
Le R1~ RFourRolled material S starts to bite in the gap between
As a result, ribs 3 of deformed steel bars are formed (FIG. 6). This bite
Bare 10 is the rib outer diameter L of the product deformed steel bar.ThreeStipulate
Since the rolling force is not applied, the outside of the material to be rolled S
The amount corresponds to the diameter H. Therefore, without applying tension
When rolled as it is, the deformed steel bar of the product is as shown in FIG.
To rib outer diameter LThreeIs the joint outer diameter LTwoIt will be larger.
However, according to the method of the present invention, rolling while applying tension is performed.
And the round hole type rFiveEntry rolled material supplied to
Reduction rate of outer diameter H of S (% of reduction amount to original outer diameter H)
Is larger, so that the rib 3 starts to bite 10
As a result, as shown in FIG.
Outer diameter L ThreeIs the joint outer diameter LTwoBecomes equal to
【0014】図9に、本発明におけるスタンド間張力と
被圧延材Sの外径減径率(H−L3)/Hとの関係を実
験的に求めた結果を示す。試験条件は次の通りとした。FIG. 9 shows the experimental results of the relationship between the tension between stands and the outer diameter reduction rate (HL- 3 ) / H of the material S to be rolled in the present invention. The test conditions were as follows.
【0015】被圧延材S 外径H:14.0mm 目標寸法 直径D :11.5mm 節の高さt :0.75mm 節間の距離L:9.5 mm リブの幅d :1.5 mm 圧延方法 4ロール圧延機による1パス圧延、直前圧延機との間の
被圧延材に張力付与 ロール形状 節頭径L7a:13.0mm 節溝深さ :0.75mm この結果から、スタンド間張力にほぼ比例して減径率が
増大しつつ次第に飽和することがわかる。本発明の異形
棒鋼の圧延方法において付与する張力の大きさは、0.
2〜1.2kg/mm2 とする。0.2kg/mm2 未
満の張力では素材(直径H>孔型の溝径を前提とした場
合)の減径率2%未満となり、噛みだしが過大になる結
果、製品はリブ外径>節外径となる。一方、上限値1.
2kg/mm2 は、被圧延材Sにちぎれが発生する張力
である。 〔実施例〕目標寸法として、直径D:11.5mm、節
間の距離L:9.5 mm、節の高さt:0.75m
m、リブの幅d:1.5 mm、リブの高さ:0.75
mmの異形棒鋼を製造するために、外径H:14.0m
mの素材を4ロール圧延機で仕上げ圧延した。Rolled material S Outer diameter H: 14.0 mm Target dimensions Diameter D: 11.5 mm Node height t: 0.75 mm Distance between nodes L: 9.5 mm Rib width d: 1.5 mm Rolling method One-pass rolling by a four-roll rolling mill, tension is applied to the material to be rolled between immediately before rolling mill Roll shape Node head diameter L 7a : 13.0 mm Node groove depth: 0.75 mm From these results, the tension between stands It can be understood that the diameter reduction rate increases and becomes gradually saturated almost in proportion to. The magnitude of the tension applied in the method of rolling a deformed steel bar according to the present invention is 0.1 mm.
2 to 1.2 kg / mm 2 . If the tension is less than 0.2 kg / mm 2, the reduction rate of the material (assuming that the diameter H is larger than the groove diameter of the hole type) is less than 2%, and the biting is excessive. Outer diameter. On the other hand, the upper limit 1.
2 kg / mm 2 is a tension at which the material to be rolled S is torn. [Example] As target dimensions, diameter D: 11.5 mm, distance L between nodes: 9.5 mm, height t of node: 0.75 m
m, rib width d: 1.5 mm, rib height: 0.75
In order to manufacture a deformed steel bar of 1 mm, the outer diameter H is 14.0 m.
m was finish-rolled with a 4-roll rolling mill.
【0016】このときの、4ロール圧延機と直前圧延機
との間の張力を0.5kgf/mm 2 とした場合を実施
例とし、比較例として無張力とした場合も加えた。いず
れの場合も、4ロール圧延機のロール形状は、節頭径L
7a:13.0mm、節溝深さ0.75mmとした。At this time, the four-roll rolling mill and the immediately preceding rolling mill
0.5kgf / mm TwoImplemented when
As an example, a case without tension was added as a comparative example. Izu
Also in this case, the roll shape of the four-roll rolling mill has a nodal head diameter L
7a: 13.0 mm, depth of the nodal groove 0.75 mm.
【0017】その結果、比較例では節の高さtは0.6
5〜0.75mmとほぼ目標値に一致したが、リブの高
さは0.9〜1.2mmと目標値より大きい方向に外れ
た。これに対し、実施例では節の高さtもリブの高さも
0.65〜0.75mmとほぼ目標値に一致するものが
製造できた。As a result, in the comparative example, the knot height t is 0.6.
Although it was almost the target value of 5 to 0.75 mm, the height of the rib was 0.9 to 1.2 mm, deviating in a direction larger than the target value. On the other hand, in the example, the knot height t and the rib height were 0.65 to 0.75 mm, which almost matched the target values.
【0018】[0018]
【発明の効果】以上説明したように、本発明に係る異形
棒鋼の圧延方法によれば、少なくとも最終仕上げ圧延機
に4ロール圧延機を用いて4条リブ異形棒鋼を圧延する
に際して、ロール孔型の節溝へ材料を十分に充満させる
と共に、直前圧延機との間において被圧延材に張力を付
与しつつ圧延するものとしたため、節部分のプルダウン
やリブ部分の過剰な噛みだしが防止されて、製品異形棒
鋼の寸法精度が向上するという効果を奏する。As described above, according to the method of rolling a deformed steel bar according to the present invention, at least when rolling a 4-rib deformed steel bar using a four-roll rolling mill as a final finishing rolling mill, The material is sufficiently filled into the nodal groove, and the rolling is performed while applying tension to the material to be rolled between the immediately preceding rolling mill, so that pull-down of the nodal portion and excessive biting of the rib portion are prevented. This has the effect of improving the dimensional accuracy of the deformed steel bar.
【図1】異形棒鋼の例を示す斜視図で、(a)は2条リ
ブ異形棒鋼、(b)は4条リブ異形棒鋼である。FIG. 1 is a perspective view showing an example of a deformed steel bar, in which (a) is a two-rib deformed steel bar, and (b) is a four-rib deformed steel bar.
【図2】4ロール圧延機のロール配置を説明する正面図
である。FIG. 2 is a front view illustrating a roll arrangement of a four-roll rolling mill.
【図3】異形棒鋼圧延の最終仕上圧延機のロールの孔型
の一例を示す模式図である。FIG. 3 is a schematic diagram showing an example of a roll groove of a final finishing mill for deformed bar rolling.
【図4】圧延時のロール孔型における肉引け(プルダウ
ン)を説明する断面図である。FIG. 4 is a cross-sectional view for explaining a thinning (pull-down) in a roll hole type at the time of rolling.
【図5】本発明のパススケジュールの一例を示す概要図
である。FIG. 5 is a schematic diagram showing an example of a path schedule according to the present invention.
【図6】本発明の最終仕上圧延機におけるロール孔型と
被圧延材との寸法関係を示す断面図である。FIG. 6 is a sectional view showing a dimensional relationship between a roll die and a material to be rolled in the final finishing mill of the present invention.
【図7】張力を付与しないで圧延された場合の異形棒鋼
の断面形状の一例を示す図である。FIG. 7 is a diagram showing an example of a cross-sectional shape of a deformed steel bar when rolled without applying tension.
【図8】張力を付与しつつ圧延された場合の異形棒鋼の
断面形状の一例を示す図である。FIG. 8 is a diagram showing an example of a cross-sectional shape of a deformed steel bar when rolled while applying tension.
【図9】スタンド間張力と材料の減径率との関係を示す
グラフである。FIG. 9 is a graph showing the relationship between the tension between stands and the diameter reduction rate of a material.
2 節 3 リブ 7 節溝 R1 ロール R2 ロール R3 ロール R4 ロール S 被圧延材 L3 リブ外径寸法2 Section 3 ribs 7 Fushimizo R 1 roll R 2 roll R 3 roll R 4 roll S material being rolled L 3 ribs outer diameter
Claims (1)
終仕上圧延機に4ロール圧延機を配し、該圧延機のロー
ル孔型の円周方向に所定間隔に形成した節溝で、ほぼ丸
断面形状の被圧延材の表面に節を成形する異形棒鋼の圧
延方法において、前記4ロール圧延機とその直前の圧延
機間の被圧延材に0.2〜1.2kgf/mm2 の張力
を付与することを特徴とする異形棒鋼の圧延方法。1. A four-roll rolling mill is arranged at least in a final finishing rolling mill of a continuous rolling mill for wire rods and bars, and a nodal groove formed at a predetermined interval in a circumferential direction of a roll die of the rolling mill. In a method of rolling a deformed steel bar in which a node is formed on the surface of a material to be rolled having a round cross section, a tension of 0.2 to 1.2 kgf / mm 2 is applied to the material to be rolled between the four-roll rolling mill and the immediately preceding rolling mill. And a method for rolling deformed steel bars.
Priority Applications (1)
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JP20172997A JP3491129B2 (en) | 1997-07-28 | 1997-07-28 | Rolling method for deformed steel bars |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20172997A JP3491129B2 (en) | 1997-07-28 | 1997-07-28 | Rolling method for deformed steel bars |
Publications (2)
Publication Number | Publication Date |
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JPH1147804A true JPH1147804A (en) | 1999-02-23 |
JP3491129B2 JP3491129B2 (en) | 2004-01-26 |
Family
ID=16445974
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JP20172997A Expired - Fee Related JP3491129B2 (en) | 1997-07-28 | 1997-07-28 | Rolling method for deformed steel bars |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102363152A (en) * | 2011-10-14 | 2012-02-29 | 山东焱鑫矿用材料加工有限公司 | Production equipment of steel for non-cold processing joint |
CN102500615A (en) * | 2011-10-21 | 2012-06-20 | 厦门虹鹭钨钼工业有限公司 | Method for manufacturing tungsten-copper alloy rods and wires |
JP2021054295A (en) * | 2019-09-30 | 2021-04-08 | 住友ゴム工業株式会社 | Tire/rim assembly |
JP2021079406A (en) * | 2019-11-20 | 2021-05-27 | Jfe条鋼株式会社 | Manufacturing method and manufacturing device of deformed reinforcement with reduced variation in deflective diametrical difference |
CN113732056A (en) * | 2021-08-10 | 2021-12-03 | 大冶特殊钢有限公司 | Rolling system of round steel |
-
1997
- 1997-07-28 JP JP20172997A patent/JP3491129B2/en not_active Expired - Fee Related
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102363152A (en) * | 2011-10-14 | 2012-02-29 | 山东焱鑫矿用材料加工有限公司 | Production equipment of steel for non-cold processing joint |
CN102500615A (en) * | 2011-10-21 | 2012-06-20 | 厦门虹鹭钨钼工业有限公司 | Method for manufacturing tungsten-copper alloy rods and wires |
JP2021054295A (en) * | 2019-09-30 | 2021-04-08 | 住友ゴム工業株式会社 | Tire/rim assembly |
JP2021079406A (en) * | 2019-11-20 | 2021-05-27 | Jfe条鋼株式会社 | Manufacturing method and manufacturing device of deformed reinforcement with reduced variation in deflective diametrical difference |
CN113732056A (en) * | 2021-08-10 | 2021-12-03 | 大冶特殊钢有限公司 | Rolling system of round steel |
Also Published As
Publication number | Publication date |
---|---|
JP3491129B2 (en) | 2004-01-26 |
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