JPS61154701A - Hot rolling method of metallic stock having trapezoidal cross section - Google Patents
Hot rolling method of metallic stock having trapezoidal cross sectionInfo
- Publication number
- JPS61154701A JPS61154701A JP28175184A JP28175184A JPS61154701A JP S61154701 A JPS61154701 A JP S61154701A JP 28175184 A JP28175184 A JP 28175184A JP 28175184 A JP28175184 A JP 28175184A JP S61154701 A JPS61154701 A JP S61154701A
- Authority
- JP
- Japan
- Prior art keywords
- section
- stock
- trapezoidal cross
- metal material
- hot rolling
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B39/14—Guiding, positioning or aligning work
- B21B39/16—Guiding, positioning or aligning work immediately before entering or after leaving the pass
- B21B39/165—Guides or guide rollers for rods, bars, rounds, tubes ; Aligning guides
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2205/00—Particular shaped rolled products
- B21B2205/04—Taper- or wedge-shaped profiles
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
この発明は断面台形の金属素材の熱間圧延方法に関する
ものであって、更に詳細には、均一な厚みに平担化され
た環状部材を製造するための素材として好適に使用され
る。断面において台形の金属素材を熱間圧延により製造
する方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for hot rolling a metal material having a trapezoidal cross section, and more specifically to a method for producing an annular member flattened to have a uniform thickness. It is suitably used as a material for The present invention relates to a method of manufacturing a metal material having a trapezoidal cross section by hot rolling.
従来技術
平担な厚みを有する環状の金属部材は、産業界において
各種の製品を製造するための素材として好適に使用され
ている６例えば石油プラントのパイプラインに使用され
る配管継手のフランジは、平担な金属製環状部材を素材
とし、該素材に所要の加工を施して得られる。その他圧
力容器に嵌装される補強リングや、各種産業機械の構成
要素をなす環状の部材としても使用される。ところでこ
の平担な環状部材を金属素材から製造するには、■所定
厚みの平担な金属板からプレスその他溶断等の手段によ
りドーナツ状に部材を打ち抜く方法と、■偏平な帯状金
属素材を環状に巻回し、その両切断端部を突合わせ溶接
して一体化する方法とがある。しかし前者のプレス等に
よる打ち抜き方法は、打ち抜きかすを伴うため無駄が多
く、金属素材を有効に活用する見地からは不利である。PRIOR ART Annular metal members with a flat thickness are suitably used as materials for manufacturing various products in industry.6 For example, the flanges of piping joints used in oil plant pipelines are It is obtained by using a flat metal annular member as a material and subjecting the material to the required processing. It is also used as a reinforcing ring fitted into pressure vessels and as annular members forming components of various industrial machines. By the way, in order to manufacture this flat annular member from a metal material, there are two methods: (1) punching out a donut-shaped member from a flat metal plate of a predetermined thickness by means such as pressing or fusing, and (2) punching a flat metal plate into a ring shape using a method such as pressing or fusing. There is a method of winding the wire around the wire and butt welding both cut ends to integrate the wire. However, the former method of punching using a press or the like is wasteful as it involves punching debris, and is disadvantageous from the standpoint of effectively utilizing the metal material.
このため金属素材から大量の環状部材を製造するには、
後者の帯状金属素材を環状に巻回する方法が、素材に無
駄がです、しかも歩留まりが良好であるので好適である
。Therefore, in order to manufacture large quantities of annular members from metal materials,
The latter method of winding the band-shaped metal material in a ring shape is preferable because there is no waste of material and the yield is good.
この後者の製造方法につき概略説明すれば、平坦で均一
な厚みを有する断面矩形状の帯状金属素材１０を、第１
図（ａ）に示すように複数の巻回ロール１２に通過させ
て環状に湾曲させる。次いでこれを切断し、その切断端
部と開放端部とをフラッシュバット溶接して、第１図（
ｂ）に示す如き所定直径の環状部材１４を得るものであ
る。しかし前述のように、断面において矩形状をなす帯
状素材１０は、これを巻回ロール群１２に通過させて湾
曲させる際に、その外周側には引張応力が加わると共に
内周側には圧縮応力が加わり、得られた環状部材は、第
３図に示すようにその断面において台形状に変形（α〈
β）する欠点がある。このように不均一な厚みの環状部
材を加工用素材として使用すると、最終製品としての仕
上り精度に好ましくない影響を及ぼすので、こ九を第１
図（ｃ）で示す如くサイジングプレス１６により環状部
材１４の両面を圧縮し、均一な厚みに修正する作業を要
しているが、これは余分の工程と設備とを必要として製
造コストを高騰させ１歩留まりを低下させるものである
。To briefly explain the latter manufacturing method, a flat metal material 10 having a rectangular cross section and a flat uniform thickness is first
As shown in Figure (a), it is passed through a plurality of winding rolls 12 and curved into an annular shape. Next, this was cut, and the cut end and open end were flash-butted welded as shown in Figure 1 (
An annular member 14 having a predetermined diameter as shown in b) is obtained. However, as described above, when the strip material 10 having a rectangular cross section is passed through the winding roll group 12 and curved, tensile stress is applied to its outer circumference, and compressive stress is applied to its inner circumference. is applied, and the resulting annular member is deformed into a trapezoidal shape (α〈
β) has the disadvantage of If an annular member with uneven thickness is used as a processing material, it will have an undesirable effect on the finishing accuracy of the final product, so this is the first priority.
As shown in Figure (c), it is necessary to compress both sides of the annular member 14 using a sizing press 16 and correct it to a uniform thickness, but this requires extra steps and equipment, which increases manufacturing costs. 1. This lowers the yield.
この問題に対しては、帯状素材の巻回成形時にその外側
および内側に夫々加わる前記引張力および圧縮応力によ
り変形する分を力学的に予め見込んで、第４図に示すよ
うに素材１８の断面を台形にしておくことにより１巻回
成形後に台形部の底部厚み寸法αおよび頂部厚み寸法β
の寸法差が吸収され、最終製品としての環状部材の厚さ
を均一に平担化できることが判明している。この場合に
、どの程度の台形比率にすべきかは、当該部材に要求さ
れる設計上の仕様や直径寸法等の要素に依存し１個別に
力学的、経験的に算出される。To solve this problem, we mechanically take into account the amount of deformation caused by the tensile force and compressive stress applied to the outside and inside of the strip material during winding, and create a cross-section of the material 18 as shown in FIG. 4. By making it into a trapezoid, the bottom thickness α and the top thickness β of the trapezoid part are formed after one turn.
It has been found that the dimensional difference can be absorbed and the thickness of the annular member as a final product can be made uniform and flat. In this case, the trapezoidal ratio that should be determined depends on factors such as design specifications and diameter dimensions required for the member, and is calculated individually mechanically and empirically.
発明が解決しようとする問題点
第４図に関連して説明した環状部材の製造に使用される
台形素材は、従来一般には、断面において矩形ないし正
方形の角形をなす金属素材を引抜き加工することにより
製造されている。しかしこのように金属素材を引抜き加
工するには、専用の設備を必要として加工コストが嵩み
、第１図（ｃ）に関連して述べた如く、台形面をプレス
修正して平担に加工する場合と同様の問題がある。Problems to be Solved by the Invention Conventionally, the trapezoidal material used to manufacture the annular member explained in connection with FIG. Manufactured. However, drawing a metal material in this way requires specialized equipment, which increases the processing cost, and as mentioned in connection with Figure 1 (c), the trapezoidal surface is press-corrected and processed into a flat surface. There is a similar problem when doing this.
発明の目的
本発明は、プレス修正等の付加工程を要することなく、
前述した均一な厚みの環状部材を製造するに際し、その
素材として供給される前記断面において台形をなす金属
素材を熱間圧延により直接製造し得るようにして、加工
コストを低置にすることを目的とする。Purpose of the Invention The present invention does not require additional steps such as press correction.
The purpose of the present invention is to reduce processing costs by directly manufacturing a metal material having a trapezoidal cross section by hot rolling when manufacturing the annular member having a uniform thickness as described above. shall be.
問題点を解決するための手段
前記目的を達成するため本発明に係る台形金属素材の熱
間圧延方法は、熱間圧延に適する温度まで加熱した所要
形状の断面を有する金属素材を、熱間工程の仕上圧延機
に対向配置した１対のテーパーローラの間に通過させて
台形断面に圧延すると共に、前記テーパーローラにおけ
る入口側および出口側に夫々対向的に配設したガイドロ
ーラにより１台形部面に圧延された金属素材の給送方向
を矯正し真直に案内するようになっている。Means for Solving the Problems In order to achieve the above object, the method for hot rolling a trapezoidal metal material according to the present invention involves rolling a metal material having a cross section of a desired shape heated to a temperature suitable for hot rolling, through a hot process. It is rolled into a trapezoidal cross section by passing it between a pair of tapered rollers placed opposite each other in a finishing rolling mill, and one trapezoidal section is rolled by guide rollers placed oppositely on the inlet and outlet sides of the taper rollers. It is designed to correct the feeding direction of the rolled metal material and guide it straight.
実施例
次に本発明に係る熱間延圧方法につき、好適な実施例を
挙げて、添付図面を参照しながら以下説明する。この断
面において台形状を有する金属素材１８ｂの熱間圧延は
、連続熱間圧延工程の最終仕上げ工程において実施され
る。すなわち図示しない連続熱間圧延ラインにおいて、
所定間隔で複数基配設した一連の水平圧延ミルおよび垂
直圧延ミル中に、熱間圧延に適する温度まで加熱した所
要形状（例えば矩形）の断面の金属素材１８ａを順次通
過させる。そしてこの熱間圧延ラインの最終仕上工程に
配設される仕上圧延機のテーパーローラの間に通過させ
ることにより、該素材１８ａを台形断面に圧延する。例
えば前記仕上圧延機には、第５図に概略図示する如きテ
ーパーローラ２０゜２０が、その回転軸を平行にかつ上
下の関係で対向配置され１両ローラの間には、第８図に
示すように軸方向において台形をなす空隙が形成されて
いる。この空隙中に、熱間圧延工程の中間段階で矩形状
断面に圧延された金属素材１８ａをスキンパスさせ、所
要の圧下刃で熱間圧延することにより、断面において台
形をなす金属素材１８ｂ（第８図）が得られる。EXAMPLES Next, the hot rolling method according to the present invention will be described below by giving preferred examples and referring to the accompanying drawings. Hot rolling of the metal material 18b having a trapezoidal cross section is performed in the final finishing step of the continuous hot rolling step. That is, in a continuous hot rolling line (not shown),
A metal material 18a heated to a temperature suitable for hot rolling and having a cross section of a desired shape (for example, rectangular) is sequentially passed through a series of horizontal rolling mills and vertical rolling mills arranged at predetermined intervals. The material 18a is then rolled into a trapezoidal cross section by passing it between tapered rollers of a finishing mill installed in the final finishing step of this hot rolling line. For example, in the finishing mill, tapered rollers 20° 20 as schematically shown in FIG. 5 are disposed facing each other in a vertical relationship with their rotating axes parallel to each other. A trapezoidal gap is formed in the axial direction. A metal material 18a rolled into a rectangular cross section at an intermediate stage of the hot rolling process is skin-passed into this gap, and hot rolled with a required rolling blade to form a trapezoidal cross section metal material 18b (eighth Figure) is obtained.
しかしこのように断面台形に圧延する際に、第８図に示
す如く、金属素材１８ｂの厚みの小さい端縁部ａと厚み
の大きい端縁部すとの夫々におけるテーパーローラ２０
の周速差に起因して、当該金属素材１８は出口側で湾曲
すると共に、圧延荷重の小さいｂ側へ逃げようとする傾
向を呈する。However, when rolling the metal material 18b into a trapezoidal cross-section, as shown in FIG.
Due to the circumferential speed difference, the metal material 18 curves on the exit side and tends to escape toward the b side where the rolling load is smaller.
この不都合を解決するため、第５図および第６図に概略
的に示すように、フラットローラからなるガイドローラ
が、前記テーパーローラ２０の入口直前と出口直後に配
置されるようになっている。In order to solve this problem, as schematically shown in FIGS. 5 and 6, guide rollers made of flat rollers are arranged immediately before the entrance and immediately after the exit of the tapered roller 20.
すなわちテーパーローラ２０．２０におけるパスライン
の上流側に配置したノズル２２に、当該パスラインを挟
んで水平に対向する一対のガイドローラ２４．２４が夫
々アーム２８を介して配設され。That is, a pair of guide rollers 24.24, which are horizontally opposed to each other with the pass line in between, are disposed via arms 28, respectively, at the nozzle 22 disposed on the upstream side of the pass line of the tapered roller 20.20.
引張ばね３０により閉成方向に弾力的に付勢されている
。またテーパーローラ２０．２０のパスライン下流側に
配置したノズル３２にも、同様の機構を有する一対のガ
イドローラ３４．３４が、開成方向に弾力的に付勢され
た状態で配設されている。It is elastically biased in the closing direction by a tension spring 30. Further, a pair of guide rollers 34, 34 having a similar mechanism are also provided at the nozzle 32 disposed downstream of the pass line of the tapered roller 20, 20 in a state where they are elastically biased in the opening direction. .
このように開成方向に弾力的に付勢されたガイドローラ
により、前記金属素材１８をテーパーローラ２２．２２
の入口側および出口側において挟圧しつつ案内すること
によって、台形断面に圧延された当該金属素材１８ｂの
給送方向を真直に矯正した状態で給送することが可能で
ある。しかも前記ガイドローラの位置を、所望とする台
形寸法の程度に応じて変化させ、前記金属素材１８のパ
スラインを変更させることにより、該素材１８の端縁部
ａの厚み寸法と端縁部すの厚み寸法を変えることもでき
る。なおテーパーローラとガイドローラとの離間寸法は
、金属素材１８が最も円滑に案内されるような値が、具
体的な圧延機の構成に応じて実験的に設定される。例え
ば、第６図に示すように、前記テーパーローラの中心線
りとガイドローラの中心線りとの距離を、金属素材１８
の端縁部ａの寸法と端縁部すの寸法との和の半分に。The guide roller elastically biased in the opening direction moves the metal material 18 to the tapered rollers 22 and 22.
By guiding the metal material 18b while pinching it at the entrance and exit sides of the metal material 18b, it is possible to feed the metal material 18b rolled into a trapezoidal cross section with its feeding direction straightened. Moreover, by changing the position of the guide roller according to the desired trapezoidal dimension and changing the pass line of the metal material 18, the thickness dimension of the edge portion a of the material 18 and the edge portion width can be changed. It is also possible to change the thickness dimension. Note that the distance between the tapered roller and the guide roller is experimentally set to a value that allows the metal material 18 to be guided most smoothly, depending on the specific configuration of the rolling mill. For example, as shown in FIG. 6, the distance between the center line of the tapered roller and the center line of the guide roller is
half of the sum of the dimensions of the edge a and the edge a.
３０を乗じた寸法［＝（ａ ＋ ｂ）／２ Ｘ ３ Ｏ
Ｆに設定するのが好ましい。Dimension multiplied by 30 [=(a + b)/2 X 3 O
It is preferable to set it to F.
なおこの台形の断面に圧延された金属素材は、次工程に
おける巻回設備の条件に応じて、伸直な条鋼の形態に切
断した状態またはループ状に巻取った状態の何れにも製
造できる。特にコイル状に巻取った金属素材は、巻回時
に棒材に比べ端尺の発生がないので、歩留上有利である
。The metal material rolled into a trapezoidal cross section can be cut into a straight bar or wound into a loop, depending on the conditions of the winding equipment in the next step. In particular, a metal material wound into a coil shape is advantageous in terms of yield because it does not produce end length when wound, compared to a bar material.
発明の効果
このように本発明に係る断面が台形をなす金属素材の熱
間圧延方法によれば、均一な厚みを有する平担な環状部
材を巻回成形するのに使用される前記断面において台形
をなす金属素材を、熱間圧延工程を経るだけで直接製造
することが可能であり、プレス等による最終修正工程を
要しないので加工コストを低置にすることができる。な
お本発明に係る方法は、前述した配管継手のフランジ等
の環状部材以外にも、リングギヤ等多くの環状部材を製
造する金属素材の圧延に好適に使用される。Effects of the Invention As described above, according to the method of hot rolling a metal material having a trapezoidal cross section according to the present invention, the cross section used for winding and forming a flat annular member having a uniform thickness has a trapezoidal shape. It is possible to directly manufacture the metal material forming the shape by simply going through a hot rolling process, and there is no need for a final correction process using a press or the like, so processing costs can be kept low. Note that the method according to the present invention is suitably used for rolling metal materials for manufacturing many annular members such as ring gears, in addition to annular members such as flanges of pipe joints described above.
第１図（ａ）〜（ｄ）は環状部材の加工工程を示す概略
説明図、第２図は第１図の■−■線断面を示す斜視図、
第３図は第１図の■−■線断面を示す斜視図、第４図は
台形素材を使用して巻回成形を行っている状態を示す概
略斜視図、第５図は本発明に係る台形断面の金属素材の
熱間圧延方法の実施に使用する仕上圧延機の内部を概略
的に示す斜視図、第６図は第５図に示す機構の平面図で
あって、上方のテーパーローラを省略した状態を示し、
第７図は第５図に示す機構の縦断面図、第８図は上下の
テーパーローラの閘の空隙状態を示す説明図である。
特許出願人 大同特殊鋼株式会社
ＦＩＧ、３
ＦＩＧ、４FIGS. 1(a) to (d) are schematic explanatory views showing the processing steps of the annular member, FIG. 2 is a perspective view showing a cross section taken along the line ■-■ in FIG. 1,
FIG. 3 is a perspective view showing a cross section taken along the line ■-■ in FIG. FIG. 6 is a perspective view schematically showing the inside of a finishing rolling mill used to hot-roll metal materials with a trapezoidal cross section. FIG. 6 is a plan view of the mechanism shown in FIG. Indicates the omitted state,
FIG. 7 is a longitudinal sectional view of the mechanism shown in FIG. 5, and FIG. 8 is an explanatory diagram showing the state of the gaps between the locks of the upper and lower tapered rollers. Patent applicant: Daido Steel Co., Ltd. FIG, 3 FIG, 4
Claims (2)
面を有する金属素材を、熱間工程の仕上圧延機に対向配
置した１対のテーパーローラの間に通過させて台形断面
に圧延すると共に、前記テーパーローラにおける入口側
および出口側に夫々対向的に配設したガイドローラによ
り、台形断面に圧延された金属素材の給送方向を矯正し
真直に案内することを特徴とする断面台形の金属素材の
熱間圧延方法。(1) A metal material having a cross section of the desired shape heated to a temperature suitable for hot rolling is rolled into a trapezoidal cross section by passing it between a pair of tapered rollers placed opposite each other in a finishing rolling mill in the hot process. , a metal material having a trapezoidal cross section, characterized in that the feeding direction of the metal material rolled into a trapezoidal cross section is corrected and guided straight by guide rollers arranged oppositely on the inlet side and the outlet side of the tapered roller. Method of hot rolling the material.
心線との距離は、前記金属素材の長手方向における一方
の端縁部の寸法と他方の端縁部の寸法との和の半分に３
０を乗じた寸法に設定される特許請求の範囲第１項記載
の断面台形の金属素材の熱間圧延方法。(2) The distance between the center line of the tapered roller and the center line of the guide roller is 3 times the sum of the dimension of one end edge and the dimension of the other end edge in the longitudinal direction of the metal material.
A method for hot rolling a metal material having a trapezoidal cross section according to claim 1, wherein the dimension is set to a value multiplied by 0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28175184A JPS61154701A (en) | 1984-12-26 | 1984-12-26 | Hot rolling method of metallic stock having trapezoidal cross section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28175184A JPS61154701A (en) | 1984-12-26 | 1984-12-26 | Hot rolling method of metallic stock having trapezoidal cross section |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61154701A true JPS61154701A (en) | 1986-07-14 |
Family
ID=17643466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28175184A Pending JPS61154701A (en) | 1984-12-26 | 1984-12-26 | Hot rolling method of metallic stock having trapezoidal cross section |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61154701A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100775468B1 (en) * | 2001-09-27 | 2007-11-12 | 주식회사 포스코 | Burr removing apparatus for the edge of the strip |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57156802A (en) * | 1981-03-25 | 1982-09-28 | Ch Polt I | Method of obtaining wedge type shape through rolling |
-
1984
- 1984-12-26 JP JP28175184A patent/JPS61154701A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57156802A (en) * | 1981-03-25 | 1982-09-28 | Ch Polt I | Method of obtaining wedge type shape through rolling |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100775468B1 (en) * | 2001-09-27 | 2007-11-12 | 주식회사 포스코 | Burr removing apparatus for the edge of the strip |
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