JP2003290803A - Base material for drawing and its manufacturing method - Google Patents
Base material for drawing and its manufacturing methodInfo
- Publication number
- JP2003290803A JP2003290803A JP2002091931A JP2002091931A JP2003290803A JP 2003290803 A JP2003290803 A JP 2003290803A JP 2002091931 A JP2002091931 A JP 2002091931A JP 2002091931 A JP2002091931 A JP 2002091931A JP 2003290803 A JP2003290803 A JP 2003290803A
- Authority
- JP
- Japan
- Prior art keywords
- base material
- dimension
- steel
- steel material
- vertical
- 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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- Metal Rolling (AREA)
- Metal Extraction Processes (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、異形断面の線材・
棒鋼を製造する際の母材およびその製造方法に関する。TECHNICAL FIELD The present invention relates to a wire rod having an irregular cross section.
The present invention relates to a base material for manufacturing a steel bar and a method for manufacturing the base material.
【０００２】[0002]
【発明が解決しようとする課題】一般に複雑な断面形状
の鋼材を引き抜き加工により製造することが行われてい
る。この引き抜き加工では、丸断面または正方形断面の
母材を異形断面鋼材へ引き抜くことが行われるが、母材
の断面形状と引き抜き加工後の断面形状とに大きな差が
ある場合には、２〜４回程度の引き抜き加工が行われ、
かつ、引き抜き加工のパス間で鋼の軟化のための熱処理
が行われている。Generally, a steel material having a complicated cross-sectional shape is manufactured by drawing. In this drawing process, a base material having a round cross section or a square cross section is drawn into a deformed section steel material. If there is a large difference between the base material cross-sectional shape and the post-drawing cross-sectional shape, 2 to 4 The drawing process is performed about once,
In addition, heat treatment for softening steel is performed between the drawing passes.
【０００３】一方、引き抜き加工用の母材となる線材・
棒鋼の製造には、２ロール圧延機による圧延方法が多く
使用さている。この２ロ一ル圧延機による圧延方法で
は、ロールで拘束されていない面の寸法及び形状を精度
良くコントロールできないので、圧延材の寸法精度に限
界がある。また、２ロール圧延機を用いて圧延するにあ
たり、ロールの円周方向に所定の寸法・形状の孔型の加
工を施して、引き抜き加工後の形状に近い孔型を有する
ロ一ルにて圧延を行って前記母材を製造し、引き抜き加
工時の加工率を小さくすることで引き抜き加工回数の削
減、熱処理の省略を行うことが可能である。しかしなが
ら、小ロット生産を行う際、母材毎に専用の孔型を有す
るロールを準備する必要があり、ロール費用が大幅に増
大する。逆に、大ロット生産を行う場合であっても、ロ
ール摩耗が早期に発生して孔型の形状が変化しやすいの
で、ロール替えを頻繁に行う必要があり、製造コストが
増大しやすい。On the other hand, a wire rod which is a base material for drawing
A rolling method using a two-roll rolling mill is often used for manufacturing steel bars. In the rolling method using the two-roll rolling mill, the dimension and shape of the surface that is not constrained by the roll cannot be controlled with high precision, so there is a limit to the dimensional precision of the rolled material. In addition, when rolling using a two-roll rolling mill, a hole having a predetermined size and shape is formed in the circumferential direction of the roll, and rolled with a roll having a hole shape close to the shape after drawing. It is possible to reduce the number of times of the drawing process and to omit the heat treatment by manufacturing the base material by performing the above process and reducing the processing rate during the drawing process. However, when performing small-lot production, it is necessary to prepare a roll having a dedicated hole shape for each base material, which significantly increases the roll cost. On the other hand, even when a large lot is produced, roll wear is likely to occur early and the shape of the hole is likely to change. Therefore, it is necessary to change rolls frequently, and the manufacturing cost is likely to increase.
【０００４】[0004]
【発明が解決しようとする課題】本発明は、上記事情に
鑑みてなされたものであり、異形断面（複雑な断面形
状）へと引き抜き加工する場合であっても、製造コスト
及び設備費を抑えることができる引き抜き加工用母材お
よびその製造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 in view of the above circumstances, and suppresses manufacturing cost and equipment cost even in the case of drawing into a modified cross section (complex cross-sectional shape). An object of the present invention is to provide a base material for drawing that can be used and a method for manufacturing the same.
【０００５】[0005]
【課題を解決するための手段】本発明者らは、４ロール
圧延機による圧延では、母材断面の周方向において９０
°毎に寸法制御が可能であり、２ロール圧延機による圧
延方法と比較して、４ロール圧延機による圧延方法のほ
うが母材の全周の断面寸法をきめ細かく制御できること
に着目した。SUMMARY OF THE INVENTION The present inventors carried out rolling by a four-roll rolling mill at 90 ° in the circumferential direction of the cross section of the base material.
It was noted that the size can be controlled for each degree, and that the rolling method using the 4-roll rolling mill can more finely control the cross-sectional dimension of the entire circumference of the base metal than the rolling method using the 2-roll rolling mill.
【０００６】本発明は、以上の知見に基づいて完成され
たものであり、本発明の引き抜き加工用母材は、引き抜
き加工により異形断面の鋼材を製造する際の母材であっ
て、前記鋼材の縦寸法に対する前記母材の縦寸法の比
率、および、前記鋼材の横寸法に対する前記母材の横寸
法の比率の両者が、それぞれ１０２％〜１２０％である
とともに、前記母材に対する前記鋼材の縦寸法の寸法減
少率と、前記母材に対する前記鋼材の横寸法の寸法減少
率との差が６％以内であることを特徴とする。The present invention has been completed based on the above findings, and the base material for drawing of the present invention is a base material for producing a steel material having an irregular cross section by drawing, Both the ratio of the vertical dimension of the base material to the vertical dimension of, and the ratio of the lateral dimension of the base material to the lateral dimension of the steel material are each 102% to 120%, and the ratio of the steel material to the base material is The difference between the dimension reduction rate of the vertical dimension and the dimension reduction rate of the lateral dimension of the steel material with respect to the base material is within 6%.
【０００７】また、本発明の引き抜き加工用母材の製造
方法は、引き抜き加工により異形断面の鋼材を製造する
際の母材の製造方法であって、前記鋼材の縦寸法に対す
る前記母材の縦寸法の比率、および、前記鋼材の横寸法
に対する前記母材の横寸法の比率の両者を、それぞれ１
０２％〜１２０％とするとともに、前記母材に対する前
記鋼材の縦寸法の寸法減少率と、前記母材に対する前記
鋼材の横寸法の寸法減少率との差を６％以内として、前
記母材を４ロール圧延機により圧延して製造することを
特徴とする。Further, the method for producing a base material for drawing according to the present invention is a method for producing a base material for producing a steel material having an irregular cross section by drawing, wherein the vertical dimension of the base material with respect to the longitudinal dimension of the steel material is used. Both the ratio of the dimension and the ratio of the lateral dimension of the base material to the lateral dimension of the steel material are 1 respectively.
02% to 120%, the difference between the dimension reduction rate of the vertical dimension of the steel material with respect to the base material and the dimension reduction rate of the lateral dimension of the steel material with respect to the base material within 6%, It is characterized by being rolled by a 4-roll rolling mill.
【０００８】[0008]
【発明の実施の形態】以下、本発明に係る引き抜き加工
用母材およびその製造方法について、図面を参照して説
明する。図１は、本発明に係る引き抜き加工用母材を製
造するのに好適な４ロール圧延機２を示すものであり、
この４ロール圧延機２は、一対の水平ロール４，６及び
一対の垂直ロール８，１０を備えている。水平ロール
４，６と垂直ロ一ル８，１０とはその圧下方向が９０°
異なっている。BEST MODE FOR CARRYING OUT THE INVENTION A base material for drawing and a method for manufacturing the same according to the present invention will be described below with reference to the drawings. FIG. 1 shows a four-roll mill 2 suitable for producing a base material for drawing according to the present invention,
The four-roll mill 2 includes a pair of horizontal rolls 4 and 6 and a pair of vertical rolls 8 and 10. Horizontal rolls 4 and 6 and vertical rolls 8 and 10 have a rolling direction of 90 °.
Is different.
【０００９】そして、本実施形態では、図２に示すよう
に、４ロール圧延機２に向けて進行してきた被圧延材１
２を、４ロール圧延機２による圧延工程で、鋼棒等の断
面四角形状に圧延しており、この圧延により引き抜き加
工用の母材が製造される。ここで、引き抜き加工後の異
形断面鋼材の縦寸法目標値Ａ１、横寸法目標値Ｂ１に対
して、前記母材、すなわち、４ロール圧延機による圧延
後の縦寸法Ａ０および横寸法Ｂ０がそれぞれ下記（１）
式、（２）式を満たすように設定される。Then, in the present embodiment, as shown in FIG. 2, the material 1 to be rolled which has progressed toward the 4-roll rolling mill 2.
2 is rolled into a quadrangular cross section of a steel rod or the like in a rolling process using a 4-roll rolling mill 2. By this rolling, a base material for drawing is manufactured. Here, with respect to the vertical dimension target value A1 and the horizontal dimension target value B1 of the deformed cross-section steel material after drawing, the above-mentioned base material, that is, the vertical dimension A0 and the horizontal dimension B0 after rolling by a 4-roll rolling mill are respectively as follows. (1)
Equation (2) is set so as to be satisfied.
【００１０】
１．０２×Ａ１≦Ａ０≦１．２０×Ａ１ ………（１）
１．０２×Ｂ１≦Ｂ０≦１．２０×Ｂ１ ………（２）
さらに、下記（３）式で定義される前記母材に対する前
記異形断面鋼材の縦寸法の寸法減少率と前記母材に対す
る前記異形断面鋼材の横寸法の寸法減少率との差Ｓが６
％以下となるように縦寸法Ａ０および横寸法Ｂ０が設定
される。1.02 × A1 ≦ A0 ≦ 1.20 × A1 (1) 1.02 × B1 ≦ B0 ≦ 1.20 × B1 (2) Further defined by the following equation (3) The difference S between the vertical dimension reduction rate of the modified cross-section steel material with respect to the base material and the lateral dimension reduction rate of the modified cross-section steel material with respect to the base material is 6
The vertical dimension A0 and the horizontal dimension B0 are set so as to be less than or equal to%.
【００１１】
Ｓ＝|[（Ａ０−Ａ１）／Ａ０−（Ｂ０−Ｂ１）／Ｂ０]×１００| ……（３）
４ロール圧延機では、圧延時に被圧延材の断面の縦方向
と横方向とを同時に拘束して圧延が行われるため、上記
（１）式と上記（２）式との両方を満たす圧延が精度良
く実施できる。ここで、母材の縦寸法Ａ０および横寸法
Ｂ０の下限値を、それぞれ異形断面鋼材の縦寸法目標値
Ａ１、横寸法目標値Ｂ１の１．０２倍としたのは、１．
０２倍未満であると、引き抜き加工による加工が不十分
となって、加工後の鋼材の上下面あるいは左右面の表面
肌が滑らかにならないだけでなく、引き抜き加工後の鋼
材のコーナー部に十分にメタルフロ一が起こらず、断面
四角形状を呈しない。S = | [(A0-A1) / A0- (B0-B1) / B0] × 100 | (3) In a 4-roll rolling mill, the longitudinal and transverse directions of the cross section of the material to be rolled during rolling. Since the rolling is performed by simultaneously constraining and, the rolling satisfying both the above formula (1) and the above formula (2) can be accurately performed. Here, the lower limits of the vertical dimension A0 and the horizontal dimension B0 of the base material are set to 1.02 times the vertical dimension target value A1 and the horizontal dimension target value B1 of the deformed cross-section steel material, respectively.
If it is less than 02 times, the processing by drawing will be insufficient, and not only the surface skin of the upper and lower surfaces or the left and right surfaces of the steel after processing will not be smooth, but also the corners of the steel after drawing will be sufficient. Metal flow does not occur and it does not have a square cross section.
【００１２】また、母材の縦寸法Ａ０および横寸法Ｂ０
の上限値を、それぞれ異形断面鋼材の縦寸法目標値Ａ
１、横寸法目標値Ｂ１の１．２０倍としたのは、１．２
０倍を超えると１回の引き抜き加工で引き抜き加工鋼材
の製造を行うことが困難となり、引き抜き加工回数が多
くなるとともに、引き抜き加工パス間において熱処理を
行う必要も生じてくる。Further, the longitudinal dimension A0 and the lateral dimension B0 of the base material
The upper limit of the vertical dimension target value A
1, 1.20 times the lateral dimension target value B1 is 1.2
If it exceeds 0 times, it becomes difficult to manufacture a drawn steel product by one drawing process, the number of drawing processes increases, and it becomes necessary to perform heat treatment between the drawing passes.
【００１３】さらに、上記（３）式で定義される縦寸法
の寸法減少率と横寸法の寸法減少率との差Ｓが６％を超
えると、寸法減少率の少ない方（縦あるいは横）の面が
十分に充満せず、形状不良や表面肌荒れの問題が生じて
しまう。具体的な数値を示して母材１２及び引き抜き加
工後の鋼材１４の形状および寸法の例について説明する
と、図３に示す母材１２は、縦寸法が３３．０mm、横寸
法が３７．５mmの矩形断面を有している。また、図４は
引き抜き加工後の鋼材１４の形状と寸法を示すものであ
り、断面四角形状を呈し、縦の目標寸法最大値が３０．
０mm、縦の目標寸法最小値が２８．２mm、縦寸法の平均
値が２９．１mm、横の目標寸法が３４．５mmであり、さ
らに上面が曲率半径８３mmの曲面形状となっている。Further, if the difference S between the dimension reduction rate of the vertical dimension and the dimension reduction rate of the lateral dimension defined by the above equation (3) exceeds 6%, the one with the smaller dimension reduction rate (vertical or horizontal) is selected. The surface is not fully filled, and problems such as poor shape and rough surface occur. Explaining an example of the shape and dimensions of the base material 12 and the steel material 14 after drawing by showing specific numerical values, the base material 12 shown in FIG. 3 has a longitudinal dimension of 33.0 mm and a lateral dimension of 37.5 mm. It has a rectangular cross section. Further, FIG. 4 shows the shape and dimensions of the steel material 14 after the drawing work, which has a quadrangular cross section and a maximum vertical target dimension of 30.
0 mm, the minimum vertical target dimension is 28.2 mm, the average vertical dimension is 29.1 mm, the horizontal target dimension is 34.5 mm, and the top surface is a curved surface with a radius of curvature of 83 mm.
【００１４】したがって、母材１２の縦寸法（３３．０
mm）は、引き抜き加工後の鋼材１４（以下、引き抜き加
工製品１４と称する）の縦寸法平均値の１．１３４倍、
縦寸法最大値（３０．０mm）の１．０８７倍、引き抜き
加工製品１４の縦寸法最小値の１．１７３倍となってお
り、また、母材１２の横寸法（３７．５mm）は引き抜き
加工製品１４の横寸法（３４．５mm）の１．１００倍と
なっている。さらに、母材１２に対する引き抜き加工製
品１４の縦寸法の寸法減少率は最小で８．０％であり、
最大で１４．６％である。また、母材１２に対する引き
抜き加工製品１４の横寸法の寸法減少率は９．１％であ
る。よって、縦寸法の寸法減少率と横寸法の寸法減少率
との差は最小で１．１％、最大で５．５％である。以上
説明した、母材１２の断面形状および寸法と引き抜き加
工製品１４の断面形状および寸法では、上記（１）式お
よび（２）式を満たしているとともに、前記母材に対す
る前記異形断面鋼材の縦寸法の寸法減少率と前記母材に
対する前記異形断面鋼材の横寸法の寸法減少率との差Ｓ
が６％以下となっているので、引き抜き加工製品１４
は、上下表面および左右表面ともに滑らかな表面肌とな
り、さらに、コーナー部にも十分にメタルフローが起こ
り目標形状に対して高精度なものとなる。Therefore, the vertical dimension of the base material 12 (33.0
mm) is 1.134 times the average longitudinal dimension of the steel material 14 (hereinafter referred to as the drawn product 14) after drawing,
1.087 times the maximum vertical dimension (30.0 mm) and 1.173 times the minimum vertical dimension of the drawn product 14, and the horizontal dimension (37.5 mm) of the base material 12 is drawn. It is 1.100 times the lateral dimension (34.5 mm) of the product 14. Furthermore, the minimum dimension reduction rate of the vertical dimension of the drawn product 14 with respect to the base material 12 is 8.0%,
The maximum is 14.6%. Further, the reduction rate of the lateral dimension of the drawn product 14 with respect to the base material 12 is 9.1%. Therefore, the difference between the vertical dimension reduction rate and the horizontal dimension reduction rate is 1.1% at the minimum and 5.5% at the maximum. The cross-sectional shape and dimensions of the base material 12 and the cross-sectional shape and dimensions of the drawn product 14 described above satisfy the above equations (1) and (2), and the longitudinal length of the modified cross-section steel material with respect to the base material. Difference S between the dimension reduction rate and the dimension reduction rate of the lateral dimension of the deformed section steel material with respect to the base material
Is 6% or less, so the drawn product 14
Has a smooth surface on both the upper and lower surfaces and the left and right surfaces, and moreover, metal flow is sufficiently generated at the corners, resulting in a highly accurate target shape.
【００１５】なお、本実施形態では、引き抜き加工製品
１４の形状が上面を曲面とした略矩形断面を有している
が、本発明の要旨がこれに限定されるものではなく、例
えば、断面が台形状等の多角形状の引き抜き加工鋼材
や、溝付きの多角形状の引き抜き加工鋼材であっても、
同様の効果を奏することができる。In the present embodiment, the shape of the drawn product 14 has a substantially rectangular cross section with the upper surface being a curved surface, but the gist of the present invention is not limited to this. Even if it is a trapezoidal polygonal drawn steel material or a grooved polygonal drawn steel material,
The same effect can be achieved.
【００１６】[0016]
【実施例】図４に示す断面形状および断面寸法を有する
引き抜き加工材を製造するにあたり、その母材を４ロー
ル圧延機を用いて、表１に示す縦寸法および横寸法に圧
延することにより製造した。表１には、母材寸法の引き
抜き加工後の寸法（製品寸法）に対する百分率：母材寸
法／製品寸法×１００の値、および、引き抜き加工によ
る寸法減少率：（母材寸法−製品寸法）／母材寸法×１
００の値を、それぞれ縦横寸法について併せて示す。EXAMPLES In producing a drawn material having a cross-sectional shape and cross-sectional dimensions shown in FIG. 4, the base material was rolled by a 4-roll mill into the vertical and horizontal dimensions shown in Table 1. did. Table 1 shows the percentage of the base material dimensions to the dimensions (product dimensions) after the drawing process: base material size / product size × 100 value, and the dimensional reduction rate due to the drawing process: (base material size−product size) / Base material size x 1
The values of 00 are also shown for the vertical and horizontal dimensions.
【００１７】また、縦横寸法減少率差についても併せて
示す。なお、縦寸法については、引き抜き加工後の縦寸
法の最大値が３０mmであり、最小値が２８．２mmである
ため、母材寸法／製品寸法ｘｌ００の値および寸法減少
率については、最大値と最小値を示した。The difference in vertical and horizontal dimension reduction rates is also shown. As for the vertical dimension, the maximum value of the vertical dimension after drawing is 30 mm and the minimum value is 28.2 mm. Therefore, the value of base material dimension / product dimension x100 and the dimension reduction rate are the same as the maximum value. The minimum value was shown.
【００１８】[0018]
【表１】 [Table 1]
【００１９】Ｎｏ．１〜４の発明例では、製品（引き抜
き加工製品１４）の上下表面、左右表面ともに滑らかな
表面肌をしており、更に、図４に示した目標寸法に対し
て寸法精度の良い製品が得られた。また、４ロール圧延
機により母材を製造するにあたっても１回の圧延により
製造が可能であった。これに対して、Ｎｏ．５の比較例
では、母材の縦寸法が製品の縦寸法に対して大き過ぎる
ため、１回の引き抜き加工では目標の製品形状に仕上げ
られなかった。No. In the invention examples 1 to 4, the upper and lower surfaces and the left and right surfaces of the product (pulled product 14) have smooth surface skins, and further, a product having good dimensional accuracy with respect to the target dimensions shown in FIG. 4 is obtained. Was given. Further, even when the base material was manufactured by the 4-roll rolling mill, it was possible to manufacture it by rolling once. On the other hand, No. In the comparative example of No. 5, the vertical dimension of the base material was too large with respect to the vertical dimension of the product, so that the target product shape could not be finished by one drawing process.
【００２０】また、Ｎｏ．６の比較例では、縦横寸法減
少率差が大きすぎる、すなわち、横寸法の寸法減少率
が、縦寸法の寸法減少率に対して小さすぎるため、製品
の左右表面に表面荒れが認められた。さらに、Ｎｏ．７
の比較例では、母材の縦寸法が製品の縦寸法に対して小
さ過ぎるため、製品の寸法精度が著しく劣っていた。ま
た、上下表面に表面荒れが認められた。No. In the comparative example of 6, the difference in the vertical and horizontal dimension reduction rates was too large, that is, the dimension reduction rate in the horizontal dimension was too small compared to the dimension reduction rate in the vertical dimension, so that surface roughness was observed on the left and right surfaces of the product. Furthermore, No. 7
In the comparative example, the vertical dimension of the base material was too small as compared with the vertical dimension of the product, so that the dimensional accuracy of the product was extremely poor. In addition, surface roughness was observed on the upper and lower surfaces.
【００２１】また、Ｎｏ．８の比較例では、母材の横寸
法が製品の横寸法に対して大き過ぎるため、１回の引き
抜き加工では目標の製品形状に仕上げられなかった。No. In Comparative Example No. 8, the lateral dimension of the base material was too large with respect to the lateral dimension of the product, so that the target product shape could not be finished by one drawing process.
【００２２】[0022]
【発明の効果】以上説明したように、本発明の引き抜き
加工用母材によれば、引き抜き加工により製造される鋼
材の縦寸法に対する母材の縦寸法の比率、および、前記
鋼材の横寸法に対する母材の横寸法の比率の両者が、１
０２％〜１２０％であるとともに、前記母材に対する前
記鋼材の縦寸法の寸法減少率と、前記母材に対する前記
鋼材の横寸法の寸法減少率との差が６％以内であるた
め、引き抜き加工を複数回行ったり、引き抜き加工パス
間で熱処理を行ったりすることがないので、引き抜き加
工を高能率、且つ低コストで実施できる。また、高い寸
法精度、高品質での引き抜き加工鋼材を製造できる。As described above, according to the base material for drawing of the present invention, the ratio of the vertical dimension of the base material to the vertical dimension of the steel material manufactured by the drawing processing and the lateral dimension of the steel material. Both of the lateral dimension ratios of the base metal are 1
Since the difference between the size reduction rate of the vertical dimension of the steel material with respect to the base material and the dimension reduction rate of the lateral dimension of the steel material with respect to the base material is within 6%, the drawing process is performed. Since the heat treatment is not performed a plurality of times or the heat treatment is not performed between the drawing passes, the drawing can be performed with high efficiency and at low cost. Further, it is possible to manufacture a drawn steel material with high dimensional accuracy and high quality.
【００２３】さらに、本発明の引き抜き加工用母材の製
造方法によれば、４ロール圧延機を用いて母材の圧延を
行うため、縦横寸法を同時に高精度に調整した母村の製
造が可能となり、引き抜き加工鋼材の縦寸法に対する母
材の縦寸法の比率、および、引き抜き加工鋼材の横寸法
に対する母材の横寸法の比率の両者を１０２％〜１２０
％にすることが可能となり、高能率、高い寸法精度、高
品質の引き抜き加工が低コストで行える母材の製造が可
能となる。Furthermore, according to the manufacturing method of the base material for drawing of the present invention, since the base material is rolled by using the 4-roll rolling mill, it is possible to manufacture the mother village in which the vertical and horizontal dimensions are simultaneously adjusted with high accuracy. Both the ratio of the vertical dimension of the base material to the vertical dimension of the drawn steel material and the ratio of the lateral dimension of the base material to the lateral dimension of the drawn steel material are 102% to 120%.
%, It becomes possible to manufacture a base material capable of high efficiency, high dimensional accuracy, and high quality drawing at low cost.
【図１】本発明に係る引き抜き加工用母材の圧延方法を
示す図である。FIG. 1 is a diagram showing a rolling method of a base material for drawing according to the present invention.
【図２】引き抜き加工用母材を４ロール圧延機により製
造する方法を概略的に示した図である。FIG. 2 is a diagram schematically showing a method of manufacturing a drawing base material by a 4-roll rolling mill.
【図３】引き抜き加工用母材の断面形状及び寸法を示す
図である。FIG. 3 is a diagram showing a cross-sectional shape and dimensions of a base material for drawing.
【図４】引き抜き加工後の鋼材の断面形状及び寸法を示
す図である。FIG. 4 is a diagram showing a cross-sectional shape and dimensions of a steel material after drawing.
２ ４ロール圧延機 ４，６ 水平ロール ８，１０ 垂直ロール １２ 被圧延材（母材） １４ 引き抜き加工鋼材（引き抜き加工製品） 24 roll mill 4,6 Horizontal roll 8,10 Vertical roll 12 Rolled material (base material) 14 Drawing steel material (drawing product)
───────────────────────────────────────────────────── フロントページの続き (72)発明者 関田 貴司 岡山県倉敷市水島川崎通１丁目（番地な し） 川崎製鉄株式会社水島製鉄所内 Ｆターム(参考） 4E002 AC12 BA04 BC05 CA19 4E096 EA02 EA14 EA22 KA01 KA09 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Takashi Sekita 1-chome, Mizushima Kawasaki-dori, Kurashiki-shi, Okayama Shi) Kawasaki Steel Co., Ltd. Mizushima Steel Works F-term (reference) 4E002 AC12 BA04 BC05 CA19 4E096 EA02 EA14 EA22 KA01 KA09
Claims (2)
造する際の母材であって、 前記鋼材の縦寸法に対する前記母材の縦寸法の比率、お
よび、前記鋼材の横寸法に対する前記母材の横寸法の比
率の両者が、それぞれ１０２％〜１２０％であるととも
に、 前記母材に対する前記鋼材の縦寸法の寸法減少率と、前
記母材に対する前記鋼材の横寸法の寸法減少率との差が
６％以内であることを特徴とする引き抜き加工用母材。1. A base material for producing a steel material having a modified cross-section by drawing, the ratio of the longitudinal dimension of the base material to the longitudinal dimension of the steel material, and the ratio of the base material to the lateral dimension of the steel material. Both of the lateral dimension ratios are respectively 102% to 120%, and the difference between the dimension reduction rate of the vertical dimension of the steel material with respect to the base material and the dimension reduction rate of the lateral dimension of the steel material with respect to the base material. Base material for drawing, characterized by being within 6%.
造する際の母材の製造方法であって、 前記鋼材の縦寸法に対する前記母材の縦寸法の比率、お
よび、前記鋼材の横寸法に対する前記母材の横寸法の比
率の両者を、それぞれ１０２％〜１２０％とするととも
に、 前記母材に対する前記鋼材の縦寸法の寸法減少率と、前
記母材に対する前記鋼材の横寸法の寸法減少率との差を
６％以内として、前記母材を４ロール圧延機により圧延
して製造することを特徴とする引き抜き加工用母材の製
造方法。2. A method for manufacturing a base material when manufacturing a steel material having a modified cross section by drawing, comprising: a ratio of a vertical dimension of the base material to a vertical dimension of the steel material; and a ratio of the vertical dimension to the lateral dimension of the steel material. Both of the ratios of the lateral dimensions of the base material are set to 102% to 120%, respectively, and the dimension reduction rate of the vertical dimension of the steel material with respect to the base material and the dimension reduction rate of the lateral dimension of the steel material with respect to the base material. Of less than 6%, the base material is rolled by a four-roll mill to produce the base material for drawing.
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|---|---|---|---|
| JP2002091931A JP4284918B2 (en) | 2002-03-28 | 2002-03-28 | Method of manufacturing base material for drawing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002091931A JP4284918B2 (en) | 2002-03-28 | 2002-03-28 | Method of manufacturing base material for drawing |
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| Publication Number | Publication Date |
|---|---|
| JP2003290803A true JP2003290803A (en) | 2003-10-14 |
| JP4284918B2 JP4284918B2 (en) | 2009-06-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007092853A (en) * | 2005-09-28 | 2007-04-12 | Nippon Brake Kogyo Kk | Method for manufacturing ring-shaped brake shoe |
-
2002
- 2002-03-28 JP JP2002091931A patent/JP4284918B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007092853A (en) * | 2005-09-28 | 2007-04-12 | Nippon Brake Kogyo Kk | Method for manufacturing ring-shaped brake shoe |
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| JP4284918B2 (en) | 2009-06-24 |
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