JPS60115302A - Edging equipment of thin slab - Google Patents
Edging equipment of thin slabInfo
- Publication number
- JPS60115302A JPS60115302A JP22205183A JP22205183A JPS60115302A JP S60115302 A JPS60115302 A JP S60115302A JP 22205183 A JP22205183 A JP 22205183A JP 22205183 A JP22205183 A JP 22205183A JP S60115302 A JPS60115302 A JP S60115302A
- Authority
- JP
- Japan
- Prior art keywords
- slab
- thin slab
- loop
- width
- hot
- 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
- 238000007688 edging Methods 0.000 title abstract 3
- 238000005096 rolling process Methods 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 13
- 238000009749 continuous casting Methods 0.000 description 10
- 238000005266 casting Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000005098 hot rolling Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000011946 reduction process Methods 0.000 description 2
- 235000008597 Diospyros kaki Nutrition 0.000 description 1
- 244000236655 Diospyros kaki Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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
- B21B1/46—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 metal immediately subsequent to continuous casting
- B21B1/463—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 metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
-
- 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
- B21B1/02—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 heavy work, e.g. ingots, slabs, blooms, or billets, in which the cross-sectional form is unimportant ; Rolling combined with forging or pressing
- B21B1/024—Forging or pressing
-
- 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
- B21B15/0035—Forging or pressing devices as units
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
Abstract
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は、薄厚スラブ特に熱間薄厚スラブの縮幅装置に
係り、特に、プレス式縮幅装置の振動を（１）
下において生じるスラブの断続的進行を吸収する薄厚ス
ラブ縮幅装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a width reduction device for thin slabs, particularly hot thin slabs, and particularly relates to vibrations of a press type width reduction device. The present invention relates to a thin slab width reduction device that absorbs the progress of the target.
従来、比較的厚い熱間スラブ（たとえば２００圃厚Ｘｂ
での幅圧延法がある。しかし、この方法を薄厚スラブ（
たとえば３０ｍｍ厚Ｘ１５００ＩＩＩｍ厚）に適用する
と、幅方向座屈の問題、及び７１いスラブの場合と同様
にロール圧延のため、変形が両側端付近に県中、即ち、
ドツグボーンのピーク位置が両側端付近くに形成され、
その後の水平圧延で、幅広がりを生じ幅戻り減少がおこ
るため幅調整効率も悪く、一方、前後端のフィッシュテ
ール量も大きく、歩留低下が著しいという欠点があった
。Conventionally, there is a width rolling method for relatively thick hot slabs (for example, 200 field thickness Xb).
For example, when applied to a slab (30mm thick x 1500IIIm thick), there is a problem of buckling in the width direction, and due to roll rolling as in the case of a 71-inch slab, deformation occurs near both ends, i.e.
The peak position of the dogbone is formed near both ends,
In the subsequent horizontal rolling, the width widens and the width return decreases, resulting in poor width adjustment efficiency.On the other hand, the amount of fishtail at the front and rear ends is large, resulting in a significant drop in yield.
一方、連続鋳造設備で幅変更を行なう方法もある。この
うち多くの連鋳設備ではスラブ幅変更を紡型交換により
行なっている。しかし７この方法では鋳造交換時、鋳造
を停止するため、鋳造効率が悪く、生産量を低下させる
。そのため、一般には、幅の集約比をはかつているのが
実情である。従つ（２）
て、多様類の幅のスラブ材を製造するのが困難である。On the other hand, there is also a method of changing the width using continuous casting equipment. In many continuous casting facilities, the slab width is changed by changing the spinning mold. However, in this method, casting is stopped when replacing the casting, resulting in poor casting efficiency and reduced production. Therefore, in general, the actual situation is to increase the width aggregation ratio. Therefore, (2) it is difficult to manufacture slab materials of various widths.
又、最近、鋳型を交換せずに鋳造中に幅変更する技術が
開発されているが、鋳片表面品質漏鋼などの問題がある
上、連続鋳造設備と熱間圧延設備の結合を図る場合に必
要な、鋳造速度の高速化及びスラブ薄厚比のもとで幅変
更する技術は、未だ多くの障害がある。Recently, a technology has been developed to change the width during casting without changing the mold, but there are problems such as steel leakage due to surface quality of the slab, and it is difficult to combine continuous casting equipment with hot rolling equipment. There are still many obstacles to the technology needed to increase the casting speed and change the width under the slab thinness ratio.
本発明の目的は、薄厚とくに熱間薄厚スラブを断続的な
縮幅手段を用いながら連続的なスラブの受入、送出を可
能とし、連続鋳造設備と熱間仕上圧延設備の結合を実現
させる縮幅装置を提供するにある。An object of the present invention is to enable continuous reception and delivery of thin slabs, especially hot thin slabs, using intermittent width reduction means, and to realize the combination of continuous casting equipment and hot finishing rolling equipment. We are here to provide you with the equipment.
本発明は、薄厚スラブ用連続鋳造設備と熱間圧延設備間
にロールのようなＲ形状で圧延せずに、平面に近い形状
たとえば、テーパ部子直線部又はＲ部子直線部をもつプ
レス工具で薄厚スラブを幅方向に振動圧下することによ
り、変形を幅中央まで浸透させ、両側板端付近に発生す
るドッグボー（３）
ンを中央寄にして、その後の水平圧延での幅戻りを小さ
くし幅調整効率を向上させ、同時にスラブ先後端の幅狭
を解消し、歩留りを向上させ又、座屈の問題は、座屈防
止工具（ローラも含）を設置して解消する縮幅装置にお
いて、入側では連続鋳造される薄厚スラブ、出側では、
熱間仕上圧延設備へのスラブの供給という連続動作に対
し、本縮幅装置のプレス動作は、プレス中ば薄厚スラブ
は停止し、開放時進行するという断続動作故、これを結
合するための、薄厚スラブのループを人、出側に形成さ
せる装置を配設し、連続鋳造設備と熱間仕上圧延設備の
連結を可能としたのである。The present invention provides a press tool having a shape close to a flat surface, for example, a straight part of a tapered part or a straight part of an R part, without rolling in an R shape like a roll between a continuous casting equipment for thin slabs and a hot rolling equipment. By vibrating down the thin slab in the width direction, the deformation penetrates to the center of the width, and the dogbow (3) that occurs near the edges of both sides of the slab is brought closer to the center, reducing the width return during subsequent horizontal rolling. In the width reduction equipment, the width adjustment efficiency is improved, and at the same time, the narrow width at the front and rear ends of the slab is eliminated, the yield is improved, and the problem of buckling is solved by installing buckling prevention tools (including rollers). Thin slabs are continuously cast on the entry side, and on the exit side,
In contrast to the continuous operation of supplying slabs to hot finishing rolling equipment, the press operation of this width reduction device is an intermittent operation in which the thin slab stops during pressing and advances when it is released. A device was installed to form a loop of thin slabs on the exit side, making it possible to connect continuous casting equipment and hot finishing rolling equipment.
本発明は従来のような厚いスラブではループ形成は不可
で、薄厚スラブであるために、可能となる点に着目した
。The present invention focuses on the fact that loop formation is not possible with conventional thick slabs, but is possible with thin slabs.
即ち、スラブ材の両端支持下での自由たわみはｕ ＝
５ ｗ Ｑ ４／ ３８４ Ｅ Ｉ （Ｔ ＝ ｂ ｏ
ｈ ３／１２ｈｉスラブ厚）
ここで従来スラブ厚、たとえば２００ｍに比較し、本発
明のねらいである３０〜５０Ｉｎ厚を比較（４）
するとＩは（３０〜５０／２００） ３＝約１／２９６
〜１／６４となり、容易に自由たわみをつくることがで
きるし、熱間材であるため、たとえば、１１００℃では
Ｅの値１．５ Ｘ １０３Ｋｇ／＋ｎｍ” と常温の約
１／１４と、これも自由たわみをつくりやすくしている
。この自由たわみにより、ピンチローラ５−６、又は８
−９間で直線部長さからの差だけ、断続送りの吸収がで
きる。That is, the free deflection of the slab material when supported at both ends is u =
5 w Q 4/ 384 E I (T = b o
h 3/12hi slab thickness) Here, compare the conventional slab thickness, for example 200m, and compare the 30-50In thickness, which is the aim of the present invention (4) Then, I is (30-50/200) 3 = approximately 1/296
~1/64, and can easily create free deflection, and since it is a hot material, for example, at 1100℃, the value of E is 1.5 x 103Kg/+nm", which is about 1/14 of room temperature This also makes it easy to create free deflection.This free deflection allows pinch rollers 5-6 or 8 to
-9, intermittent feed can be absorbed by the difference from the straight section length.
以下、本発明の一実施例を第１図ないし第３図により説
明する。An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.
第１図で連続鋳造設備１で鋳造された薄厚スラブ２は、
保熱炉３を通り、テーブル４上を搬送され、ピン４０−
ラ５に倒達し、本発明の縮幅装置部へと確実にスラブ２
を供給する。なお、図中７はスラブ縮幅装置、１０はサ
ポートローラ、１１は圧延機、１５はループ部である。The thin slab 2 cast by the continuous casting equipment 1 in Fig. 1 is
It passes through the heat retention furnace 3, is conveyed on the table 4, and the pin 40-
5 and securely transfer the slab 2 to the width reducing device section of the present invention.
supply. In the figure, 7 is a slab width reduction device, 10 is a support roller, 11 is a rolling mill, and 15 is a loop portion.
縮幅装置本体７の主たる構成は、第２図に示すように、
薄厚スラブ２と直接接触する部分は材料流れ方向にテー
パ部子直線部形状（平面形状に近（５）
ければ他の形状でもよい）のプレス工具１２をもち、プ
レス工具１２を材料流れ方向と直角方向（図中矢印）に
周期的に動作させる油圧ジヤツキ１３と、プレス荷重を
受けるハウジング１４からなる。この他には、油圧ジヤ
ツキ１３の位置制御を行なう装置、薄厚スラブ２の入側
の幅ｂｏに応じて、油圧ジャッキ１３全体の位置を決め
る圧下位置設定装置部（たとえばウオームによるスクリ
ュー圧下）も備えている。又、振動動作を与える装置は
、油圧でなく、クランクを使用した機械式％式％
第３図はプレス工具１２と薄厚スラブ２の動作説明図で
ある。The main structure of the width reduction device main body 7 is as shown in FIG.
The part that comes into direct contact with the thin slab 2 has a press tool 12 with a tapered part in the straight line shape (any other shape is acceptable as long as it is close to a planar shape) in the material flow direction. It consists of a hydraulic jack 13 that operates periodically in a right angle direction (arrow in the figure) and a housing 14 that receives a press load. In addition, it is also equipped with a device that controls the position of the hydraulic jack 13, and a reduction position setting device that determines the overall position of the hydraulic jack 13 according to the width bo of the entrance side of the thin slab 2 (for example, screw reduction using a worm). ing. Further, the device for giving the vibration motion is not a hydraulic one, but a mechanical type using a crank.
第３図で実線は縮幅動作Ｓ完了時の状態を示し、次に、
縮幅ａだけプレス工具１２が開方向に逃げるとともスラ
ブ材２をスラブ押装置によってＡ点からＢ点に移動Ｐさ
せる。即ち、薄厚スラブ２は断続的な進み方をし、プレ
ス工具１２が、縮幅ａ、周波数ｆのを弦波で振動する場
合には、進み平均速度νは
（６）
乍＝ ａ ｆ ／ ｔ ａ ｎ α
となる。従って、生産量を満足させるように、ａ。In FIG. 3, the solid line indicates the state when width reduction operation S is completed, and then:
When the press tool 12 escapes in the opening direction by the reduced width a, the slab material 2 is moved P from point A to point B by the slab pushing device. That is, when the thin slab 2 advances intermittently and the press tool 12 vibrates in a sinusoidal manner with a reduced width a and a frequency f, the average advancing speed ν is (6) 乍 = a f / t It becomes a n α. Therefore, in order to satisfy the production volume, a.
ｆ、αを決めてやればよい。しかし、このように、スラ
ブ２は、縮幅過程Ｓで断続的な進行動作を示すため、入
側の連続鋳造設備１からのスラブ２の ・連続的搬送、
及び出側の熱間仕上圧延設備１１へのスラブ２の連続的
供給を行なうために縮幅装置本体７の人、出側にループ
１５を形成させる。このループ１５は、３０圃厚等の薄
厚スラブ故に形成可となる。このループ１５の長さは縮
幅過程Ｓでスラブ２が停止している間の長さで、たとえ
ば、前述の正弦波でｆをＩＨｇとし、縮幅装置本体７の
入側速度を１０ｍ／ｎｕｎとすると正味１０ｍ／６０（
分）Ｘｏ、５（秒）＝０．０８４ｍ （８４ｎｗｎ）で
よいが余裕をみてもそれ程大きな値とならず、薄厚スラ
ブ２の自由なたわみ、即ち、フリーループで十分である
。このフリーループ１５の形成は、ピンチローラ６．８
で行なう。All you have to do is decide f and α. However, in this way, since the slab 2 exhibits intermittent advancing motion in the width reduction process S, the slab 2 is continuously conveyed from the continuous casting equipment 1 on the entry side.
A loop 15 is formed on the output side of the width reducing apparatus main body 7 in order to continuously supply the slab 2 to the hot finishing rolling equipment 11 on the output side. This loop 15 can be formed because of the thin slab, such as 30 field thickness. The length of this loop 15 is the length while the slab 2 is stopped during the width reduction process S. For example, if f is IHg in the above-mentioned sine wave and the entrance speed of the width reduction device main body 7 is 10 m/nun. Then net 10m/60(
Minutes) This free loop 15 is formed by the pinch roller 6.8.
Let's do it.
ここで、フリーループを吸収するためのピンチローラ間
（５−６，８−９）距離Ｑと、フリール（７）
−プの高さＨについで下記条件及び式を用い、かつ、ル
ープをめるときは第４図のような曲線Ｒでたわむとして
概略算出すると
必要ループ長 ９０１師
熱間薄厚スラブ寸法 ３０ｍＴｌ厚Ｘ １５００ｍｍ幅
Ｅ＝ １．５ Ｘ ］ ０３ｋ ｇ／＋ｎｍ （１１−
００°Ｃ）Ｈ＝５ｗＱ４／３８４ＥＩ （ｗ：単位長の
スラブ重量）
ＲｆＪ−２Ｒｓ ｉｎθ／２＝９０（ｍｍ）Ｈ＝Ｒ（］
、−Ｃｃｏ Ｏ／２）
とすれば、
Ｑ÷５ｍ、Ｈ÷５７０Ｉとなる。Here, the following conditions and formulas are used for the distance Q between the pinch rollers (5-6, 8-9) and the height H of the freel (7) to absorb the free loop, and the loop is When bending along a curve R as shown in Figure 4, the required loop length is roughly calculated: 901 Thin slab dimensions 30 m Tl thickness
00°C) H=5wQ4/384EI (w: Slab weight of unit length) RfJ-2Rs inθ/2=90(mm) H=R(]
, -Cco O/2), then Q÷5m, H÷570I.
これに両端の支持条件による違いを考慮してもそれ程大
きな差はない。Even if the difference due to the support conditions at both ends is taken into account, there is not that much of a difference.
従って、コンバク１−な設備としてまとまる。Therefore, it can be put together as a single piece of equipment.
本発明によれば、プレス式縮幅装置により、大幅圧下と
断面形状良好な薄厚スラブの縮幅が可能で、縮幅動作の
断続性を、人出側の薄厚スラブのフリーループで吸収で
きるため、簡単な構成で連（８）
続鋳造設備と熱間仕上圧延設備の結合が可能となる。According to the present invention, the press-type width reduction device is capable of reducing the width of a thin slab with a large reduction and a good cross-sectional shape, and the discontinuity of the width reduction operation can be absorbed by the free loop of the thin slab on the exit side. , it becomes possible to connect continuous casting equipment (8) and hot finishing rolling equipment with a simple configuration.
第１図は本発明の縮幅装置を配設した連続鋳造設備−熱
間仕」二圧延設備の系統図、第２図は縮幅装置本体の断
面図、第３図は縮幅動作説明図、第４図はルーパ使用時
の説明図である。
５．６．８．９・・ピンチローラ。
代理人 弁理士 高橋明夫
（９）
翳２０
桔３霞
（０，）
力４−邑
＝１０−Fig. 1 is a system diagram of continuous casting equipment-hot rolling equipment equipped with the width reduction device of the present invention, Fig. 2 is a sectional view of the main body of the width reduction device, and Fig. 3 is an explanatory diagram of width reduction operation. , FIG. 4 is an explanatory diagram when using the looper. 5.6.8.9...Pinch roller. Agent Patent attorney Akio Takahashi (9) 20 Kaki 3 Kasumi (0,) Power 4 - U = 10 -
Claims (1)
に近い、たとえばテーパ部と直線部又はＲ部と直線部等
の形状のプレス工具で、幅方向に振動させながら圧下す
る薄厚スラブ縮幅装置において、 前記薄厚スラブ縮幅装置の入側及び出側に前記熱間薄厚
スラブ材の材料流れ方向における断続的進行を吸収する
ために、前記熱間薄厚スラブ材のループを形成させるル
ープ形成部を設けたことを特徴とする薄厚スラブ縮幅装
置。 ２、特許請求の範囲第１項において。 前記熱間薄厚スラブ材ループをフリーループとしたこと
を特徴とする薄厚スラブ縮幅装置。[Claims] 1. A hot thin slab material with a small thickness/width ratio is vibrated in the width direction with a press tool having a shape close to a planar shape, for example, a tapered part and a straight part, or an R part and a straight part, etc. In a thin slab width reduction device that rolls down the thin slab material while rolling the thin slab material, the hot thin slab material is placed on the entrance and exit sides of the thin slab width reduction device to absorb the intermittent progress of the hot thin slab material in the material flow direction. What is claimed is: 1. A thin slab width reduction device, characterized in that a loop forming section is provided for forming a loop. 2. In claim 1. A thin slab width reduction device characterized in that the hot thin slab material loop is a free loop.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22205183A JPS60115302A (en) | 1983-11-28 | 1983-11-28 | Edging equipment of thin slab |
| US06/673,786 US4651550A (en) | 1983-11-28 | 1984-11-21 | Method of decreasing width of thin slab and apparatus therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22205183A JPS60115302A (en) | 1983-11-28 | 1983-11-28 | Edging equipment of thin slab |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60115302A true JPS60115302A (en) | 1985-06-21 |
Family
ID=16776324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22205183A Pending JPS60115302A (en) | 1983-11-28 | 1983-11-28 | Edging equipment of thin slab |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60115302A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6333104A (en) * | 1986-07-29 | 1988-02-12 | Ishikawajima Harima Heavy Ind Co Ltd | Continous casting and rolling equipment for thin sheet |
| US4793168A (en) * | 1986-04-14 | 1988-12-27 | Hitachi, Ltd. | Method of and apparatus for effecting a thickness-reduction rolling of a hot thin plate material |
| JPH02133101A (en) * | 1988-11-11 | 1990-05-22 | Hitachi Ltd | Hot rolling device |
| US6761053B2 (en) | 1997-09-16 | 2004-07-13 | Ishikawajima-Harima Heavy Industries Co., Ltd. | Plate reduction press apparatus and methods |
| US7137283B2 (en) * | 1997-10-14 | 2006-11-21 | Ishikawajima-Harima Heavy Industries Co., Ltd. | Plate reduction press apparatus and methods |
-
1983
- 1983-11-28 JP JP22205183A patent/JPS60115302A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4793168A (en) * | 1986-04-14 | 1988-12-27 | Hitachi, Ltd. | Method of and apparatus for effecting a thickness-reduction rolling of a hot thin plate material |
| JPS6333104A (en) * | 1986-07-29 | 1988-02-12 | Ishikawajima Harima Heavy Ind Co Ltd | Continous casting and rolling equipment for thin sheet |
| JPH02133101A (en) * | 1988-11-11 | 1990-05-22 | Hitachi Ltd | Hot rolling device |
| US5094094A (en) * | 1988-11-11 | 1992-03-10 | Hitachi, Ltd. | Hot-rolling equipment and a method of hot-rolling a slab |
| US6761053B2 (en) | 1997-09-16 | 2004-07-13 | Ishikawajima-Harima Heavy Industries Co., Ltd. | Plate reduction press apparatus and methods |
| EP1679134A1 (en) * | 1997-09-16 | 2006-07-12 | Ishikawajima-Harima Heavy Industries Co., Ltd. | Plate reduction press apparatus and methods |
| US7137283B2 (en) * | 1997-10-14 | 2006-11-21 | Ishikawajima-Harima Heavy Industries Co., Ltd. | Plate reduction press apparatus and methods |
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