JPS5945032A - Roll stand recombining device of forming machine - Google Patents

Roll stand recombining device of forming machine

Info

Publication number
JPS5945032A
JPS5945032A JP15635482A JP15635482A JPS5945032A JP S5945032 A JPS5945032 A JP S5945032A JP 15635482 A JP15635482 A JP 15635482A JP 15635482 A JP15635482 A JP 15635482A JP S5945032 A JPS5945032 A JP S5945032A
Authority
JP
Japan
Prior art keywords
line
base
roll
recombination
online
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
Application number
JP15635482A
Other languages
Japanese (ja)
Other versions
JPH0241370B2 (en
Inventor
Koji Tateo
蓼尾 紘二
Akiyoshi Kuroda
黒田 明義
Hiroshi Watanabe
浩 渡辺
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Corp
Original Assignee
Nippon Steel Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP15635482A priority Critical patent/JPS5945032A/en
Publication of JPS5945032A publication Critical patent/JPS5945032A/en
Publication of JPH0241370B2 publication Critical patent/JPH0241370B2/ja
Granted legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B31/00Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/08Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts
    • B21B31/10Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts by horizontally displacing, i.e. horizontal roll changing

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rollers For Roller Conveyors For Transfer (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Abstract

PURPOSE:To reduce downtime of the line and improve productivity by performing roll adjustment on off-line and recombining rolls at every stand assembly. CONSTITUTION:Bases 1, 2 stand by on-line and other bases 8, 9, after preparation for passing and with rolls for recombination mounted on them, stand by on new roll preparation line. The base 1 is shifted to the first position A, and shifted to the downstream side of the line, and the part between the base 8 and on-line is made open. The base 8 is shifted to the position of recombination and set to on-line. By this, new rolls are incorporated in the line. Then, the base 1 is shifted to upstream side of the line and pulled in to the off-line side when it is made parallel to the base 8. Thus, recombination of the base 1 and base 8 is completed. By this way, one process of roll recombination is completed. Similarly, the base 2 is changed with the base 9.

Description

【発明の詳細な説明】 本発明はパイプ等を成形する成形(瓜のロールスタフ組
紐。、1装置に関する。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for forming pipes and the like (melon Rollstuff braiding).

従来、ロール及びロールスタンlの組替作業は:4ンラ
イン内で1−1−ルを主軸及び軸受箱等と共にクレーン
にて吊支して行う方法と、専用の組替装置を用いてロー
ルをオフライン上1に引出し、新l」−ルをオンライン
に七ノドする方法が採られている。
Conventionally, the reassembly work for rolls and roll stands has been carried out by: suspending the 1-1 roll together with the main shaft and bearing box using a crane in a 4-in line; and using a special reassembly device. The method used is to withdraw the file offline and then transfer the new file online.

通常の場合、成形ロールは生産の種類やロールの摩耗程
度及びyitE等の発生の度合に応じ゛ζ交換すルカ、
」−記の方法ではいずれもう・イン外に新ロールを配置
しておき、旧ロールをラインから取除いた後に新ロール
をう・イン内に組入れ、さらにう・イン内においてロー
ル間隙等の調整を行うものである。
Normally, forming rolls are replaced depending on the type of production, the degree of roll wear, and the degree of occurrence of yitE, etc.
In the method described above, a new roll is placed outside the line, the old roll is removed from the line, the new roll is installed inside the line, and the gap between the rolls is adjusted inside the line. This is what we do.

1)tっで、ロールの組替作業とロールセノ1時のIf
f!II整作業の二段階を要するので、ロール交換時の
ライン休止時間が長くなるのでライン稼動率か低「し、
/−L産性の面で問題をηニジ゛ζいる。
1) At the time, roll rearrangement work and roll seno 1 o'clock If
f! Since two stages of straightening work are required, the line downtime during roll replacement will be longer, resulting in lower line operation rate.
/-L There are problems in terms of productivity.

本発明はかかる従来の1」−爪交換に当っての問題を解
消しようとするもので、U−ル、軸、及びチョックを−
・体向に組込んだスタン1アソ−Jzンブリーごとにロ
ール組替を行ない、かつオフライン上で事前にロール調
整を行なったものをそのままオンジ・1゛ンに移動さ・
UるものC1組替作業後l゛1らに通販を行)ことがご
きる成形機θ月1−ルスタン1組替装置をIll IJ
Ii ’Jるごとを1・−1的とするものである。
The present invention is an attempt to solve the conventional problem of replacing the claws, and is to replace the U-rule, shaft, and chock.
・Change the roll for each Stan 1 assembly that has been incorporated into the stance, and move the roll adjustment that has been made in advance offline to the on-site 1-in.
After the recombination work of Urumono C1, we will mail order the molding machine θ Month 1-Rustan 1 recombination device to Ill IJ.
Ii'J is 1.-1.

以1・、本発明を添11図面に示す実施例に基いて説明
する。
In the following, the present invention will be explained based on the embodiments shown in the attached 11 drawings.

6連の1〜1−ルスタンI−をライン上に並列した状態
の甲自国と測自国夕それぞれ第1図と第2図に示す。図
中(11,(2+は通販作業ライン(メンライン)に直
11する方向に伸延して設りたスライ1、し・−ル(5
)上を移動可能に設りたー・−スであっ°C3同一・−
スfl+、 +2+上には各々しr−ルスタン1−(3
)1(4)が載置固定されている。同スラ・(I’ L
・−ル(5)のオンライン側と所要距団団11れだ位置
の新1.1−ルlI” fJiI′iう・rンには新ロ
ール(R2)をIz ノlシた1」−ルスタンI’ f
f1) 、 +71を載置したベース(叱(9)を配置
する。
Six series of 1 to 1-Rustan I- are shown in Figures 1 and 2, respectively, in a state in which they are lined up in parallel on a line. In the figure, (11, (2+) are slides 1, (2+) extending directly to the mail order work line (men line).
) The upper part is movable.
On the bases fl+, +2+, there are r-Rustan 1-(3
)1(4) is placed and fixed. Same sura (I' L
・New role (R2) is added to the online side of rule (5) and the required distance group 11 positions. Roustan I'f
f1), place the base (Scary (9)) with +71 on it.

通常の場合、スライドレール(5)の長さは各151−
ルスタンI” (3) 、 (41、+61 、 (7
1の中の3倍以上となるようにしておく。
Normally, the length of each slide rail (5) is 151-
Rustan I” (3), (41, +61, (7
Make sure that it is at least 3 times as large as 1.

(10)はベース(1)を押動する移動装置をなす油圧
シリンダを示し、前記のベース(1)に連結したシリン
ダ1−IノF’ (H) ;J )が油圧シリンダθ0
)の作動に上りベース(11をオンラインと新17−ル
1llj備う・イア/間の中間位置をなず組替位置ま−
ζ押出し、移動さけ乙ごとがでgる。他のベース(2+
、 (81,(91にもそれぞれ間様な油圧シリンダ(
If) 、  (12) 、  (+3)がそのロット
 (lla)、  (12a)’、  (+3;J) 
?i:連「古しご設りられ、それぞれの組(・)位置ま
ご押動J’ 4よ゛)になっている。
(10) indicates a hydraulic cylinder forming a moving device for pushing the base (1), and the cylinder 1-I no F'(H); J) connected to the base (1) is the hydraulic cylinder θ0.
) to operate the base (11 on-line and the new 17-rule 1llj).
ζ Extrusion and movement will occur. Other bases (2+
, (81, (91 also has various hydraulic cylinders (
If), (12), (+3) are the lot (lla), (12a)', (+3;J)
? i: ``An old ladder has been set up, and each group (・) position is like J' 4).

組替位置にはそれぞれの・・−ス(11,F2+、 (
131,+91を冒降さUる昇降装置(I4)が設りら
れζいる。
At the rearrangement position, each...- (11, F2+, (
An elevating device (I4) is installed to move up and down 131, +91.

第3図と第4図はこの昇降装置(14)の構造を示4′
正面図と側面図である。
Figures 3 and 4 show the structure of this lifting device (14).
They are a front view and a side view.

同%1. tlf装置fi(14)は、機枠(14;3
)と、回転自在の11月反状のローラ(14f)を載置
ずろチーゾル(14+1)とから成り、また機枠(14
a)には、前記テーブル(14(1)を昇降さ−Uるた
めに、同テーブル(+4d)の1面に当I妾するt’ 
ソI’ (+4 c )を有する油圧シリンダ(14b
)が内蔵されζいる。
Same%1. The tlf device fi (14) is connected to the machine frame (14; 3
) and a chisel (14+1) on which a freely rotatable curved roller (14f) is mounted, and a machine frame (14f).
a) In order to raise and lower the table (14(1)), there is a t' placed on one side of the table (+4d).
Hydraulic cylinder (14b) with so I' (+4 c)
) is built-in.

また、(14e)はテーブル(1/ld)を案内するた
め1現枠(14;1)内に挿入された案内ロノ1−を示
−J。
Further, (14e) shows the guide line 1-J inserted in the 1 current frame (14;1) to guide the table (1/ld).

(15)はラインと・11行に設4Jられる移動装置を
な′J油圧シリンダi:、lトノN’(15a)の先端
には各ベースの1面に係合するフック(15b)を取イ
リGノ゛でいる。
(15) is a line and a moving device installed in line 11. A hook (15b) that engages with one surface of each base is attached to the tip of the hydraulic cylinder i:, l tonneau N' (15a). I'm in a bad mood.

ロールスタンl”(31,(4+内には交換されるべき
旧1:J −−ル(R+ )が内蔵され、 一方メソラ
イン側のIt−ルスタンl” ((il 、 (71内
には新ロール(■ン2)が組込まれる。このに2−ルス
タンI(G)、 +71内の新CI−,11/(122
)はJ’−) ラ−(7J−で、その1fflJ反作業
に必要な隙間調整等が丁・め完了しており、ロールスタ
ンl” (61、(7)をAンラインー・・シフl’ 
J’るだりで、1、+1+ II;−に通板開始がri
J能である。
The old 1: J--le (R+) to be replaced is built into the roll stand l''(31, (4+), while the new roll stand l'' ((il, (71) on the mesoline side is built-in. (■ N2) is incorporated. In this, 2-Rustan I (G), new CI-,11/(122
) is J'-) Ra-(7J-, the gap adjustment necessary for the 1fflJ work has been completed, and the roll stand l" (61, (7) is A line... Schifl'
At J' Rudari, boarding started at 1, +1+ II;-.
It is J-Noh.

上記構成の1+−ルスタンl′組替装置にょる組替f、
 jli’iを第5図の、1ル〕式1ツ1により説明す
る。
Recombination f by the 1+-Rustan l' recombination device having the above configuration,
jli'i will be explained using the formula 1 in FIG.

第5図(81は、絹(・1前の各機器の配置ircを示
し、・、−〕、(+1、 +21が」ンシ・イン上に、
他のベース(8)、(9)か通板V曽1」14を経こ組
替[1−ルを載置して新ロールン1” (lninミラ
インにあるt16機状態を示゛J。
FIG.
Replace the other bases (8) and (9) with the plate threading V so 1'' 14 and place the new roll 1'' (shows the state of the T16 machine on the lnin mill line).

第51WllLりに第5 III (alの待機状態か
ら、オンジ・インの移動ベース(」)を組(遠位置から
オフラインに移動さ・I!乙状態を示す。この移動に当
っては、第3図および第4図に示ずベースfilの凹部
(1a)に、5r隆装儂:(14)のローラ(+4f)
とが整合するよ・)に、第1121に示すシリンダ00
)のT:’ ノt” (10a )の伸出m、を制御す
る。
In the 51st WllL, the 5th III (from the standby state of the al In the concave portion (1a) of the base fil, not shown in the figures and FIG.
), cylinder 00 shown in No. 1121
) of T:'not'' (10a).

以−ににより、第5し1(h)の第1の位置(Δ)とな
った時点でベース(1)と油圧シリンダ(10)のr、
1ソ1 (1(l a )との連結を解き、胛隆装置(
14)の油圧シリンダ(+4b)を作動してテーブル(
14(1)を−1昇さ一1!、l:’  7 (14r
 ) ヲベース(ll’F面)凹mi (Ia)内に嵌
太さ・lるとともに、さらにロット (14c)を伸出
さ・Uてベース(1)を上昇させ、同ペース(1)をソ
、う・mlレー月バ5)より−Lカに持ら−にげる。
As a result, when the first position (Δ) of the fifth part 1 (h) is reached, the r of the base (1) and the hydraulic cylinder (10),
1 so 1 (1 (la) is disconnected from the
14) operates the hydraulic cylinder (+4b) to move the table (
14(1) rises by -1! , l:' 7 (14r
) wo base (ll'F side) in the concave mi (Ia), extend the lot (14c) further, raise the base (1), move the same pace (1), U・ML Re month bar 5) from -L power - to get.

この時点でベース(1)はl:+−シ(14F)に支持
されることとなり、1」−ラ(14f)は回転可能であ
るのご、・・−ス(1)はラインと平行方向に移動可能
となる。次にシリンダ(15)のI:’ ノ!” (1
5a )を伸出さ・uて、−7ソ’) (+5b) ニ
ヨリ第5図(blc7) (H)に示ずう・イン下流側
に移動さul−1−ス(8)と;(7917間を開h(
状態と7A ’J。
At this point, the base (1) is supported by l:+-shi (14F), and 1''-ra (14f) is rotatable. It becomes possible to move to. Next, cylinder (15) I:' ノ! ” (1
(7917 Pause (
State and 7A'J.

・、−人(8)とオンライン間にある胃訪−装置(14
)を卒j−1’lγさlノご後、浦化し・りンダ(12
)を作動し7で−・−ス()3)タスクf1し−ル(5
1の絹(\)位置ま゛ζ移動さl、同油圧シリンタ (
12)との連結t、l974<とともにう(ン測の油圧
シリンダ(1(すに連係さ・Uる。
・、-The gastrointestinal device (14) between the person (8) and the online
) After graduation, Linda Urarashi (12
) and at 7 -... -s () 3) task f1 - rule (5
1 silk (\) position is moved to ゛ζl, the same hydraulic cylinder (
12) is connected to the hydraulic cylinder (1).

そしテY(S 5 図1e) ニジW) ′3’ 、1
ン)t= ”:−スIH):?i ンt :/ ’>・
インにヒツトずれば新1,1−ル(R2)かう−Cンに
組込まれることにソ4る。
Soshite Y (S 5 Fig. 1e) Niji W) '3', 1
t= ”:-sIH):?i nt:/ '>・
If the input is hit, the new 1,1-rule (R2) will be incorporated into the C-in.

次にT1をさ・l!に勺だりシ1降装通1(14)・を
1胃さU、油圧シリンダ (15)によりベース(1)
をライン上流側に移動さ−l、・、−ス(8)に並列状
態となした時点で5’i’隆装)匹(14)を王1:I
・さ14’(、−1−スfllをスラf1・し・〜ルf
511−に購架し油圧シリンダ(12)のl:I y 
l” (12a)に連結さけてAノライン測(新CI−
ル’I’ U#う・イン側)に引込めば(第5図(d)
)、−・−ス(1)と・・−ス(8)の組(・1作業が
完rする。以−にの−・−;ζ交19jに、1、す1.
+−ルノ、タン1゛(3)と新1コール(R2)を自J
る1−1−ルスクン1″(6)との組替が行え、!」−
ル組替の・過程が終rする。
Next, T1! Attach the base (1) with the hydraulic cylinder (15) and the 1 (14)
Moved to the upstream side of the line and placed it in parallel with -l, .
・Sa14'(, -1-sfl.
511- is installed on the rack and the hydraulic cylinder (12) l:I y
A no line measurement (new CI-
(Figure 5(d))
), - ・ − (1) and ・ ・ ・ − − (8) group (1 work is complete. − Ζ ζ ζ ζ 交 交 交 交 交 交 交 交 ζ
+- Runo, tan 1゛ (3) and new 1 call (R2) own J
You can rearrange it with 1-1-Rusukun 1″ (6)!”-
The process of recombination is completed.

次にうCン−1−流側の−・−ス(2)を・\−ソ、(
゛))に交換゛4・と〕が、これは第5図((すから第
5図(8)に示す要韻ご行ス(い、油圧シリンダ(II
) 、  (13) 、  (15)及び5′il降装
置(14)の操作は前述と同様である。
Next, ucn-1-flow side -・-su (2)・\-so, (
゛))) is replaced with ゛4.〕, but this is the hydraulic cylinder (II
), (13), (15) and the operation of the 5'il lowering device (14) is the same as described above.

以上により、ライン」−には新r:I−ル(R2)〜タ
イiする[1−ルスタントil+、 (71がセノi−
され、しかも新し+−ル(R2)はオソラ・イン(j’
li+:+−ルitl′−(、、j7jう・イン)にて
I、1−ル11旧雀等の♂fi11 整を完了してい、
【。
As a result of the above, the line ``-'' has a new r:
Moreover, the new +- rule (R2) is Osora in (j'
li+:+-le itl'-(,, j7j u・in) I, 1-le 11 old sparrow etc. ♂fi11 completed the adjustment,
[.

の′(即問に通1kJるごとがてき、l、I−ル組()
1作業II9冒;■か短くなる。
'(Immediate question 1kJ routine, l, I-le group ()
1 Work II9 Expansion; ■ or shorter.

一1述のよ・)に7ン発明によ11.ば1コール調整を
行−ったに1−ルスタン1全体を組替えるようにIMT
成したのど、同ロールスタン1をオンラインに七ノ1−
コるだりの組替時間しか要せず、ラインのダウンター(
ムを削減することができ、4L産性の向−1−を図?)
ごとかできるとい・)すJ果がある。
11. Due to the seven inventions mentioned above. If 1 call adjustment is made, 1 call will be adjusted, and 1 call will be reclassified as a whole.
I made the same roll stun 1 online.
It only takes time to reassemble the corrugated line, and the downter of the line (
Is it possible to reduce the amount of 4L production and improve 4L productivity? )
There is a benefit to being able to do something like that.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明に係るし1−ルスクン1組替装置の全体
重面図、第2図は同第1し1のI −1線による矢視図
、第3図は昇降装置の正面図、第4図は同側面図、第5
1ツ1は・\−ソ、の絹イ・1丁順を示−J1菌式%式
% (5)   ス ン で  1  し・ −ル(II+
l、  (II) 、  (1’2) 、  (13)
 、  (15)   シリンダ(移動装置) (14)      ′)了 1:Y装置(14f) 
  +:r−ラ
Fig. 1 is an overall top view of the 1-Rusukun 1 recombination device according to the present invention, Fig. 2 is a view taken along the I-1 line of the same 1-Rusukun 1, and Fig. 3 is a front view of the lifting device. , Figure 4 is the same side view, Figure 5 is the same side view.
1 1 indicates the order of ・\-so, 1 digit, -J1 bacterial formula % formula % (5)
l, (II), (1'2), (13)
, (15) Cylinder (moving device) (14) ') End 1: Y device (14f)
+:r-ra

Claims (1)

【特許請求の範囲】[Claims] 1、 オンラインに直交しで伸延しかつロールスタンI
−を載置し°ζ上記オンラ・インカ向に少くとも2つ以
上設りられるベースを摺動自在に支持する1μ数のスラ
・イ1−レールと、オンラ・インと同;4ンラ・インか
ら所要距離呂11隔した通板準備ライン間の・\−スの
移動を行・)移動装置rLと、両う・イン間に配置され
・\−スをスラー1 ル−ルより」三方に」1昇さ−1
るとともにオンラ・インと平行力量に転勤自在に支1!
j−3る昇降装置と、−1−記ヘースを同Wliに装置
上におい(オンラインと下行方向に移動さ−Uる移動装
置とからなることを特徴とする成形機の1.1−ルスタ
ンI組()装置。
1. Online orthogonal distraction and roll stun I
A 1-μ number of slide rails that slidably support at least two or more bases on which - is mounted and at least two bases installed in the direction of the above-mentioned online inca; A moving device rL is placed between the threading preparation lines separated by a required distance of 11 from the threading preparation line. ” 1 rise - 1
At the same time, you can freely transfer to online and parallel skills!
1.1-Rustan I of a molding machine characterized by consisting of an elevating device, and a moving device for moving the heath in the online and downward directions on the device. set() device;
JP15635482A 1982-09-07 1982-09-07 Roll stand recombining device of forming machine Granted JPS5945032A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15635482A JPS5945032A (en) 1982-09-07 1982-09-07 Roll stand recombining device of forming machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15635482A JPS5945032A (en) 1982-09-07 1982-09-07 Roll stand recombining device of forming machine

Publications (2)

Publication Number Publication Date
JPS5945032A true JPS5945032A (en) 1984-03-13
JPH0241370B2 JPH0241370B2 (en) 1990-09-17

Family

ID=15625917

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15635482A Granted JPS5945032A (en) 1982-09-07 1982-09-07 Roll stand recombining device of forming machine

Country Status (1)

Country Link
JP (1) JPS5945032A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6129699A (en) * 1984-07-23 1986-02-10 Nitto Boseki Co Ltd Heat exchanger for high temperature dust containing gas
JPH03180213A (en) * 1989-12-06 1991-08-06 Kawasaki Steel Corp Manufacture of welded steel pipe and its apparatus
JPH03180212A (en) * 1989-12-06 1991-08-06 Kawasaki Steel Corp Manufacturing device for welded steel pipe and its handling method
JP2008200717A (en) * 2007-02-20 2008-09-04 Kobe Steel Ltd Rolling mill for rolling bar steel

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07303320A (en) * 1994-04-28 1995-11-14 Jiyointo Kogyo:Kk Waterproofing structure for conduit tube connection

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56154209A (en) * 1980-04-28 1981-11-28 Hitachi Ltd Rearranging apparatus for roll and stand of rolling mill
JPS56154208A (en) * 1980-04-28 1981-11-28 Hitachi Ltd Replacing apparatus for roll of rolling mill

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56154209A (en) * 1980-04-28 1981-11-28 Hitachi Ltd Rearranging apparatus for roll and stand of rolling mill
JPS56154208A (en) * 1980-04-28 1981-11-28 Hitachi Ltd Replacing apparatus for roll of rolling mill

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6129699A (en) * 1984-07-23 1986-02-10 Nitto Boseki Co Ltd Heat exchanger for high temperature dust containing gas
JPH0243998B2 (en) * 1984-07-23 1990-10-02 Nitsuto Boseki Kk
JPH03180213A (en) * 1989-12-06 1991-08-06 Kawasaki Steel Corp Manufacture of welded steel pipe and its apparatus
JPH03180212A (en) * 1989-12-06 1991-08-06 Kawasaki Steel Corp Manufacturing device for welded steel pipe and its handling method
JP2008200717A (en) * 2007-02-20 2008-09-04 Kobe Steel Ltd Rolling mill for rolling bar steel

Also Published As

Publication number Publication date
JPH0241370B2 (en) 1990-09-17

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