JPS63154207A - Method and device for manufacturing seamless metallic tube - Google Patents
Method and device for manufacturing seamless metallic tubeInfo
- Publication number
- JPS63154207A JPS63154207A JP29679286A JP29679286A JPS63154207A JP S63154207 A JPS63154207 A JP S63154207A JP 29679286 A JP29679286 A JP 29679286A JP 29679286 A JP29679286 A JP 29679286A JP S63154207 A JPS63154207 A JP S63154207A
- Authority
- JP
- Japan
- Prior art keywords
- cooling water
- lubricant
- plug
- injection port
- tube
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 238000000034 method Methods 0.000 title abstract description 7
- 238000002347 injection Methods 0.000 claims abstract description 56
- 239000007924 injection Substances 0.000 claims abstract description 56
- 239000000314 lubricant Substances 0.000 claims abstract description 54
- 239000000498 cooling water Substances 0.000 claims abstract description 52
- 238000005096 rolling process Methods 0.000 claims abstract description 37
- 239000002184 metal Substances 0.000 claims description 9
- 239000005068 cooling lubricant Substances 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 5
- 229910002804 graphite Inorganic materials 0.000 abstract description 5
- 239000010439 graphite Substances 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 11
- 238000001816 cooling Methods 0.000 description 6
- 230000007547 defect Effects 0.000 description 6
- 238000007796 conventional method Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000005461 lubrication Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B25/00—Mandrels for metal tube rolling mills, e.g. mandrels of the types used in the methods covered by group B21B17/00; Accessories or auxiliary means therefor ; Construction of, or alloys for, mandrels or plugs
- B21B25/04—Cooling or lubricating mandrels during operation
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Extraction Processes (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、プラグミル圧延法を用いた継目無金属管の製
造方法および装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method and apparatus for manufacturing a seamless metal tube using a plug mill rolling method.
［従来の技術］
プラグミル圧延法は、加熱された素材鋼片をピアサ−に
よって穿孔圧延し、その後中空素管をプラグミルによっ
て延伸圧延し、ざらにリーラミルで肉厚、長さ等の寸法
精度を調整することにより、継目無鋼管を製造する。こ
こで、プラグミルやリーラミルにあっては、プラグバー
の先端部に取付けられるプラグを素管内に挿入して、圧
延ロールとプラグの間で素管を圧延することとしている
。[Conventional technology] In the plug mill rolling method, a heated raw steel billet is pierced and rolled using a piercer, then a hollow tube is elongated using a plug mill, and dimensional accuracy such as wall thickness and length is adjusted using a rough reel mill. By doing so, seamless steel pipes are manufactured. Here, in a plug mill or a reel mill, a plug attached to the tip of a plug bar is inserted into the raw tube, and the raw tube is rolled between rolling rolls and the plug.
ところで、ピアサ−で穿孔された素管の新生中空内面に
は、空気との接触に基づく酸化によってスケールが生成
される。上記スケールが生じた素管をプラグミルやリー
ラミルで圧延すると、素管内面にスケールが噛込んで内
面疵を生ずる。Incidentally, scale is generated on the newly formed hollow inner surface of the raw pipe pierced by the piercer due to oxidation due to contact with air. When the raw pipe with the scale formed thereon is rolled with a plug mill or a reel mill, the scale gets caught on the inner surface of the raw pipe and causes inner surface flaws.
そこで従来、特開昭Ｇｏ−１３０４０８号公報に記載さ
れるように、プラグバーの先端部に取付けられるプラグ
を素管内に挿入して、圧延ロールとプラグの間で素管を
圧延するに際し、該素管内に冷却水と潤滑剤を同時に噴
射する技術が提案されている。上記従来の技術によれば
、■冷却水噴射口から噴射される冷却水を管内面に供給
して、管内面に生成しているスケールを冷却させて脆化
し、さらに崩壊させて、圧延時におけるスケールの管内
面への噛込みを防止するとともに、■潤滑剤噴射口から
噴射される潤滑剤を、プラグと管内面に供給して、プラ
グと管内面とを効果的に潤滑し、これにより、素管内面
スケールの存在に起因する内面疵の発生が防止できる。Conventionally, as described in Japanese Patent Application Laid-Open No. 130408, a plug attached to the tip of a plug bar is inserted into the raw pipe and the raw pipe is rolled between the rolling rolls and the plug. A technology has been proposed that simultaneously injects cooling water and lubricant into the tube. According to the above-mentioned conventional technology, cooling water injected from the cooling water injection port is supplied to the inner surface of the tube to cool and embrittle the scale forming on the inner surface of the tube, causing it to collapse further, so that it can be used during rolling. In addition to preventing scale from biting into the inner surface of the tube, the lubricant sprayed from the lubricant injection port is supplied to the plug and the inner surface of the tube to effectively lubricate the plug and the inner surface of the tube. It is possible to prevent the occurrence of inner surface flaws due to the presence of scale on the inner surface of the raw pipe.
［発明が解決しようとする問題点］
しかしながら、上記従来の技術にあっては、プラグバー
の先端部に設けられる冷却水噴射口と潤滑剤噴射口が、
それぞれ、プラグバーの先端部の周囲において等間隔を
なす３位置に設けられているにすぎない、したがって、
素管内面の周方向における冷却水の供給量分布、および
潤滑剤の供給量分布がそれぞれ周方向において不均一と
なる。[Problems to be Solved by the Invention] However, in the above conventional technology, the cooling water injection port and the lubricant injection port provided at the tip of the plug bar are
each at only three equally spaced positions around the tip of the plug bar; therefore,
The distribution of the supply amount of cooling water and the distribution of the supply amount of lubricant in the circumferential direction of the inner surface of the blank tube become non-uniform in the circumferential direction.
これにより、■素管内面の冷却状態が周方向で不均一と
なり、熱間加工性が不均一となるとともに、■素管内面
の潤滑状態が周方向で不均一となり、圧延潤滑性が不均
一となるため、プラグ疵を生じ、また、このプラグ疵が
転写して素管内部疵を生ずる。また、圧延効率、圧延サ
イクルタイム（圧延時間＋圧延準備時間）の向上にも限
界がある。As a result, ■ the cooling condition of the inner surface of the raw tube becomes uneven in the circumferential direction, resulting in uneven hot workability, and ■ the lubrication condition of the inner surface of the raw tube becomes uneven in the circumferential direction, resulting in uneven rolling lubricity. As a result, plug flaws occur, and these plug flaws are transferred to cause internal flaws in the tube. Furthermore, there is a limit to the improvement in rolling efficiency and rolling cycle time (rolling time + rolling preparation time).
本発明は、素管内面を周方向に関して均一冷却するとと
もに均一潤滑し、管内面品質、圧延効率、プラグ寿命を
向上可能とすることを目的とする。An object of the present invention is to uniformly cool the inner surface of the raw tube in the circumferential direction and uniformly lubricate it, thereby improving the tube inner surface quality, rolling efficiency, and plug life.
［問題点を解決するための手段］
本発明に係る継目無金属管の製造方法は、プラグバーの
先端部に取付けられるプラグを素管内に挿入して、圧延
ロールとプラグの間で素管を圧延するに際し、該素管内
に冷却水と潤滑剤を同時に噴射する継目無金属管の製造
方法において、冷却水を素管内面の周方向の全域に略均
等に噴射するとともに、潤滑剤を素管内面の周方向の全
域に略均等に噴射するようにしたものである。[Means for Solving the Problems] The method for manufacturing a seamless metal pipe according to the present invention involves inserting a plug attached to the tip of a plug bar into the raw pipe, and inserting the raw pipe between the rolling rolls and the plug. In a method for manufacturing a seamless metal tube in which cooling water and lubricant are simultaneously injected into the tube during rolling, the cooling water is injected almost uniformly over the entire circumferential area of the inner surface of the tube, and the lubricant is injected into the tube. It is designed to spray almost uniformly over the entire area in the circumferential direction of the surface.
本発明に係る継目無金属管の製造装置は、プラグバーの
先端部に取付けられるプラグを一対の圧延ロール間に配
置するとともに、プラグバーの先端部に冷却水噴射口と
潤滑剤噴射口を設け、冷却水噴射口に連通ずる冷却水供
給管路と潤滑剤噴射口に連通ずる潤滑剤供給管路のそれ
ぞれをプラグバーの内外に延設してなる継目無金属管の
製造装置において、冷却水噴射口は、冷却水を素管内面
の周方向の全域に略均等に噴射可能とする範囲に設けら
れ、潤滑剤噴射口は、潤滑剤を素管内面の周方向の全域
に略均等に噴射可能とする範囲に設けられるようにした
ものである。In the seamless metal pipe manufacturing apparatus according to the present invention, a plug attached to the tip of a plug bar is arranged between a pair of rolling rolls, and a cooling water injection port and a lubricant injection port are provided at the tip of the plug bar. In a seamless metal pipe manufacturing device in which a cooling water supply pipe communicating with a cooling water injection port and a lubricant supply pipe communicating with a lubricant injection port are respectively extended inside and outside a plug bar, the cooling water The injection port is provided in a range that allows the cooling water to be sprayed almost evenly over the entire circumferential area of the inner surface of the raw tube, and the lubricant injection port is provided in a range that can spray the lubricant approximately evenly over the entire circumferential area of the inner surface of the raw tube. It is designed to be provided within the range that is possible.
［作用］
本発明によれば、素管圧延時に、■冷却水噴射口から噴
射される冷却水を管内面に供給して、管内面に生成して
いるスケールを冷却させて脆化し、さらに崩壊させて、
圧延時における管内面への噛込みを防止するとともに、
■潤滑剤噴射口から噴射される潤滑剤をプラグと管内面
に供給して、プラグと管内面とを効果的に潤滑し、これ
により、素管内面スケールの存在に起因する内面疵の発
生が防止できる。[Function] According to the present invention, during rolling of the raw tube, cooling water injected from the cooling water injection port is supplied to the inner surface of the tube to cool the scale generated on the inner surface of the tube, embrittle it, and further disintegrate it. Let me,
In addition to preventing biting into the inner surface of the tube during rolling,
■The lubricant injected from the lubricant injection port is supplied to the plug and the inner surface of the tube to effectively lubricate the plug and the inner surface of the tube, thereby preventing the occurrence of inner surface flaws due to the presence of scale on the inner surface of the raw tube. It can be prevented.
ここで、本発明にあっては、冷却水が素管内面の周方向
の全域に略均等に噴射されるとともに、潤滑剤が素管内
面の周方向の全域に略均等に噴射される。したがって、
■素管内面の冷却状態が周方向に均一となり、熱間加工
性が均一となるとともに、■素管内面の潤滑状態が周方
向に均一となり、圧延潤滑性が均一となる。Here, in the present invention, the cooling water is sprayed substantially uniformly over the entire circumferential area of the inner surface of the blank tube, and the lubricant is sprayed substantially uniformly over the entire circumferential area of the inner surface of the blank tube. therefore,
(1) The cooling state of the inner surface of the raw tube becomes uniform in the circumferential direction, resulting in uniform hot workability, and (2) The lubrication state of the inner surface of the raw tube becomes uniform in the circumferential direction, resulting in uniform rolling lubricity.
すなわち、本発明によれば、素管内面を周方向に関して
均一冷却するとともに均一潤滑し、管内面品質、圧延効
率、プラグ寿命を向上することができる。That is, according to the present invention, the inner surface of the raw tube can be uniformly cooled and lubricated in the circumferential direction, and the quality of the tube inner surface, rolling efficiency, and plug life can be improved.
［実施例］
第１図は本発明の一実施例に係るプラグパーの要部を示
す断面図、第２図は第１図の■−■線に沿う断面図、第
３図は第１図のＩＩＩ−ＩＩＩ線に沿う断面図、第４図
は冷却水および潤滑剤の噴射状態を示す模式図、第５図
は傾斜ロール圧延機の全体を示す模式図である。[Example] Fig. 1 is a sectional view showing the main parts of a plugper according to an embodiment of the present invention, Fig. 2 is a sectional view taken along the line ■-■ in Fig. FIG. 4 is a schematic diagram showing the injection state of cooling water and lubricant, and FIG. 5 is a schematic diagram showing the entire inclined roll rolling mill.
第５図の傾斜ロール圧延ｆｉ（リーラミル）ｌＯは、上
下一対の傾斜ロール１１とプラグ１２の間で素管工３を
圧延可能としている。１４はプラグパー、１５はスラス
トブロック台車である。The inclined roll rolling fi (reeler mill) IO shown in FIG. 5 enables rolling of the raw pipe work 3 between a pair of upper and lower inclined rolls 11 and a plug 12. 14 is a plugper, and 15 is a thrust block truck.
プラグパー１４は、第１図〜第４図に示すように、プラ
グ１２が取付けられる部分より前方に突出する先端部に
、冷却水噴射口１６と潤滑剤噴射口１７を備えている。As shown in FIGS. 1 to 4, the plugper 14 is provided with a cooling water injection port 16 and a lubricant injection port 17 at a tip portion that projects forward from a portion where the plug 12 is attached.
冷却水噴射口１６と潤滑剤噴射口１７は、それぞれ、プ
ラグパー１４の周方向に連゛続する円環スリット状に設
けられている。The cooling water injection port 16 and the lubricant injection port 17 are each provided in the shape of an annular slit continuous in the circumferential direction of the plugper 14 .
また、プラグパー１４は、その基端部から先端部に向け
て延びる冷却水供給路１８を備え、冷却水供給路！８の
先端部に連なる３木の連通路１８Ａを円環状噴射室１８
Ｂに連通し、前記冷却水噴射口１６をこの噴射室１８Ｂ
に直結している。The plugper 14 also includes a cooling water supply path 18 extending from its base end toward its distal end. An annular injection chamber 18 is connected to a communication path 18A of three trees connected to the tip of the
B, and the cooling water injection port 16 is connected to this injection chamber 18B.
is directly connected to
また、プラグパー１４は、その基端部から先端部に向け
て延びる潤滑剤供給路１９を備え、潤滑剤供給路１９の
先端部に連なる３本の連通路１９Ａを前記潤滑剤噴射口
１７に連結している。なお、前記潤滑剤噴射口１７は、
円環状の絞り１７Ａを備え、連通路１９Ａから供給され
る潤滑剤を潤滑剤噴射口１７の周方向に均等に配分でき
るようにしている。The plugper 14 also includes a lubricant supply path 19 extending from its base end toward its distal end, and connects three communication paths 19A that are connected to the distal end of the lubricant supply path 19 to the lubricant injection port 17. are doing. Note that the lubricant injection port 17 is
An annular restrictor 17A is provided so that the lubricant supplied from the communication path 19A can be evenly distributed in the circumferential direction of the lubricant injection port 17.
プラグパー１４の冷却水供給路１８には冷却水供給管２
０が連なり、潤滑剤供給路１９には潤滑剤供給管２１が
連なっている。潤滑剤供給管２１には、空気配管２２を
介して空気圧源２３が接続され、空気配管２２の中間部
には黒鉛供給源２４の出口部が接続されている。黒鉛供
給源２４は。A cooling water supply pipe 2 is connected to the cooling water supply path 18 of the plug par 14.
0 are connected, and the lubricant supply pipe 21 is connected to the lubricant supply path 19. An air pressure source 23 is connected to the lubricant supply pipe 21 via an air pipe 22, and an outlet of a graphite supply source 24 is connected to the middle part of the air pipe 22. The graphite supply source 24 is.
ホッパー２５とロータリーバルブ２６からなり、ロータ
リーパルプ２６の駆動モータ２７は、熱塊検出器２８が
素管１３の進入を検出した時点で駆動開始し、素管１３
の退出を検出した時点で駆動停止する。Consisting of a hopper 25 and a rotary valve 26, the drive motor 27 for the rotary pulp 26 starts driving when the hot mass detector 28 detects the entry of the raw pipe 13, and
The drive stops when the exit of the vehicle is detected.
次に、上記実施例の作用について説明する９上記実施例
によれば、素管１３の圧延時に、■冷却水噴射口１６か
ら噴射される冷却水を管内面に供給して、管内面に生成
しているスケールを冷却させて脆化し、さらに崩壊させ
て、圧延時における管内面への噛込みを防止するととも
に、■潤滑剤供給口１７から噴射される潤滑剤（黒鉛）
をプラグ１２と管内面に供給して、プラグ１２と管内面
とを効果的に潤滑し、これにより、管内面スケールの存
在に起因する内面疵の発生が防止できる。Next, the operation of the above-mentioned embodiment will be explained.9 According to the above-mentioned embodiment, when rolling the raw pipe 13, cooling water injected from the cooling water injection port 16 is supplied to the inner surface of the pipe, and generated on the inner surface of the pipe. The lubricant (graphite) injected from the lubricant supply port 17 is
is supplied to the plug 12 and the inner surface of the tube to effectively lubricate the plug 12 and the inner surface of the tube, thereby preventing the occurrence of inner surface flaws due to the presence of scale on the inner surface of the tube.
ここで、上記実施例にあっては、冷却水が素管内面の周
方向の全域に略均等に噴射されるとともに、潤滑剤が素
管内面の周方向の全域に略均等に噴射される。したがっ
て、■素管内面の冷却状態が周方向に均一となり、熱間
加工性が均一となるとともに、■素管内面の潤滑状態が
周方向に均一となり、圧送潤滑性が均一となる。Here, in the above embodiment, the cooling water is sprayed substantially uniformly over the entire circumferential area of the inner surface of the blank tube, and the lubricant is sprayed substantially uniformly over the entire circumferential area of the inner surface of the blank tube. Therefore, (1) the cooling state of the inner surface of the raw tube becomes uniform in the circumferential direction, resulting in uniform hot workability, and (2) the lubrication state of the inner surface of the raw tube becomes uniform in the circumferential direction, resulting in uniform pumping lubricity.
すなわち、上記実施例によれば、素管内面を周方向に関
して均一冷却するとともに均一潤滑し、管内面品質、圧
延効率、プラグ寿命を向上することができる。That is, according to the embodiment described above, the inner surface of the raw tube can be uniformly cooled and lubricated in the circumferential direction, and the quality of the tube inner surface, rolling efficiency, and plug life can be improved.
第６図は本発明の他の実施例に係るプラグパーの要２部
を示す断面図である。FIG. 6 is a sectional view showing two main parts of a plugper according to another embodiment of the present invention.
この実施例が前記第１図の実施例と異なる点は、潤滑剤
噴射口１７に絞り１７Ａを設けることなく、潤滑剤噴射
口１７のスリット厚ｔ１を連通路１９Ａの直径１０より
小とし、これにより連通路１９Ａから供給される潤滑剤
を潤滑剤噴射口１７の周方向に均等に配分できるように
したことにある。なお、この例では、冷却水噴射口１６
のスリット厚Ｌ１も噴射室１８Ｂの通路＠ＬＯより小と
し、これにより噴射室１８Ｂから供給される冷却水を冷
却水噴射口１６の周方向に均等に配分できるようにして
いる。This embodiment is different from the embodiment shown in FIG. This makes it possible to evenly distribute the lubricant supplied from the communication path 19A in the circumferential direction of the lubricant injection port 17. In addition, in this example, the cooling water injection port 16
The slit thickness L1 is also smaller than the passage @LO of the injection chamber 18B, so that the cooling water supplied from the injection chamber 18B can be evenly distributed in the circumferential direction of the cooling water injection port 16.
なお、＠１図、第６図の両実施例にあっては、冷却水噴
射口１６、潤滑剤噴射口１７のスリット部分が冷却水、
潤滑剤の周方向への均等配分のため極めて小さく設定さ
れる傾向にある。したがって、それら噴射口１６．１７
に連なる供給管路内における一定値以上の圧力上昇を検
知する等により、それら供給管路内を適時フラッシング
し、それら供給管路内の堆積物等を必要に応じて除去す
ることが望ましい。Note that in both the embodiments shown in Figures @1 and 6, the slit portions of the cooling water injection port 16 and the lubricant injection port 17 contain the cooling water,
It tends to be set extremely small in order to distribute the lubricant evenly in the circumferential direction. Therefore, those injection ports 16.17
It is desirable to flush the supply pipes in a timely manner by detecting a pressure rise above a certain value in the supply pipes connected to the pipes, and to remove deposits and the like in the supply pipes as necessary.
第７図は本発明の他の実施例を示す模式図である。FIG. 7 is a schematic diagram showing another embodiment of the present invention.
この実施例が前記第１図の実施例と異なる点は、プラグ
バー１４に設けた前記円環スリット状の冷却水噴射口１
６、潤滑剤噴射口１７に代えて、プラグ／＜−１４の周
方向にそれぞれ多数（ｎ個）の冷却水噴射口３１と潤滑
剤噴射口３２を設けたことにある。すなわち、冷却水噴
射口３１が噴射する冷却水（第７図のＡ）は、隣接する
冷却水噴射口３１が噴射する冷却水と一部重なり（第７
図のＢ）、素管１３の内面の周方向の全域に略均等の冷
却水量を供給する。また、潤滑剤噴射口３２が噴射する
潤滑剤（第７図のＣ）は、隣接する潤滑剤噴射口３２が
噴射する潤滑剤と一部重なり（第７図のＤ）、素ｖ１３
の内面の周方向の全域に略均等の潤滑剤量を供給する。This embodiment differs from the embodiment shown in FIG.
6. Instead of the lubricant injection port 17, a large number (n) of cooling water injection ports 31 and lubricant injection ports 32 are provided in the circumferential direction of the plug/<-14. That is, the cooling water injected by the cooling water injection port 31 (A in FIG. 7) partially overlaps with the cooling water injected by the adjacent cooling water injection port 31 (A in FIG. 7).
B) in the figure, a substantially equal amount of cooling water is supplied to the entire circumferential area of the inner surface of the blank pipe 13. Furthermore, the lubricant injected by the lubricant injection port 32 (C in FIG. 7) partially overlaps the lubricant injected by the adjacent lubricant injection port 32 (D in FIG. 7),
A substantially equal amount of lubricant is supplied to the entire circumferential area of the inner surface of the lubricant.
以下、本発明の具体的実施結果について説明する。Hereinafter, specific implementation results of the present invention will be explained.
第８図は均一冷却性がプラグ疵発生に及ぼす影響を示す
状態図である０本発明によれば、圧延本数が増加しても
不均一冷却に起因するプラグ疵の発生は見られなかった
。これに対し、 ３個の冷却水噴射口および潤滑剤噴射
口のみを備えた従来法では、圧延本数が２〜１１本に達
した時、プラグ疵の発生が見られた。FIG. 8 is a state diagram showing the effect of uniform cooling on the occurrence of plug defects. According to the present invention, no occurrence of plug defects caused by uneven cooling was observed even when the number of rolled sheets increased. On the other hand, in the conventional method equipped with only three cooling water injection ports and lubricant injection ports, plug defects were observed when the number of rolled sheets reached 2 to 11.
第９図は均一潤滑性がプラグ疵発生に及ぼす影響を示す
状態図である０本発明によれば、圧延本数が５０〜１０
０本に達するまでプラグ疵の発生は見られなかった。こ
れに対し、 ３個の冷却水噴射口と潤滑剤噴射口のみを
備えた従来法では、圧延本数が４０〜８０本に達した時
、プラグ疵の発生が見られた。Fig. 9 is a state diagram showing the influence of uniform lubricity on the occurrence of plug defects.
No plug flaws were observed until the number of plugs reached zero. On the other hand, in the conventional method equipped with only three cooling water injection ports and a lubricant injection port, plug defects were observed when the number of rolls reached 40 to 80.
第１０図は本発明と従来法による圧延効率を比較して示
す線図である０本発明では黒鉛噴射量を１５〜３０ｇ／
秒とし、 ３（ｉｌの潤滑剤噴射口を備えた従来法では
黒鉛噴射量を６〜１０ｇ／秒とした０本発明により、圧
延効率が飛躍的に向上することが認められる。また、本
発明により、圧延サイクルタイムも１０％程度向上する
ことが認められた。Figure 10 is a diagram comparing the rolling efficiency of the present invention and the conventional method.
In the conventional method equipped with a lubricant injection port of 3 (il), the graphite injection amount was set to 6 to 10 g/sec. It is recognized that the rolling efficiency is dramatically improved by the present invention. It was recognized that the rolling cycle time was also improved by about 10%.
【発明の効果］
以上のように、本発明によれば、素管内面を周方向に関
して均一冷却するとともに均一潤滑し、管内面品質、圧
延効率、プラグ寿命を向上することができる。[Effects of the Invention] As described above, according to the present invention, the inner surface of the raw tube can be uniformly cooled and lubricated in the circumferential direction, and the quality of the tube inner surface, rolling efficiency, and plug life can be improved.
第１図は本発明の一実施例に係るプラグバーの要部を示
す断面図、第２図は第１図の■−■線に沿う断面図、第
３図は第１図の■−■線に沿う断面図、第４図は冷却水
および潤滑剤の噴射状態を示す模式図、第５図は傾斜ロ
ール圧延機の全体を示す模式図、第６図は本発明の他の
実施例に係るプラグバーの要部を示す断面図、第７図は
本発明の他の実施例を示す模式図、第８図は均一冷却性
がプラグ疵発生に及ぼす影響を示す状態図、第９図は均
一潤滑性がプラグ疵発生に及ぼす影響を示す状？！！ｉ
図、第１０図は本発明と従来法による圧延効率を比較し
て示す線図である。
１０・・・傾斜ロール圧延機、１１・・・傾斜ロール、
１２・・・プラグ、１３・・・素管、１４・・・プラグ
バー。
１６・・・冷却水噴射口、１７・・・潤滑剤噴射口、１
８・・・冷却水供給路、１９・・・潤滑剤供給路、２０
・・・冷却水供給管、２１・・・潤滑剤供給管。
代理人 弁理士 塩 川 修 治
第 ２ 圓
第 ８ 図
ジ六
連 ９ 回
男 ５去
う去FIG. 1 is a cross-sectional view showing the main parts of a plug bar according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the line ■-■ in FIG. 1, and FIG. 3 is a cross-sectional view along the line ■-■ in FIG. 4 is a schematic diagram showing the injection state of cooling water and lubricant, FIG. 5 is a schematic diagram showing the entire inclined roll rolling mill, and FIG. 6 is a schematic diagram showing another embodiment of the present invention. FIG. 7 is a schematic diagram showing another embodiment of the present invention, FIG. 8 is a state diagram showing the influence of uniform cooling on the occurrence of plug defects, and FIG. 9 is a cross-sectional view showing the main parts of such a plug bar. Condition showing the influence of uniform lubricity on plug flaw occurrence? ! ! i
10 are graphs showing a comparison of rolling efficiency according to the present invention and the conventional method. 10... Inclined roll rolling mill, 11... Inclined roll,
12...Plug, 13...Main pipe, 14...Plug bar. 16... Cooling water injection port, 17... Lubricant injection port, 1
8... Cooling water supply path, 19... Lubricant supply path, 20
...Cooling water supply pipe, 21...Lubricant supply pipe. Agent Patent Attorney Osamu Shiokawa 2nd En No. 8 Figure 6 series 9th man 5 leaving
Claims (2)
内に挿入して、圧延ロールとプラグの間で素管を圧延す
るに際し、該素管内に冷却水と潤滑剤を同時に噴射する
継目無金属管の製造方法において、冷却水を素管内面の
周方向の全域に略均等に噴射するとともに、潤滑剤を素
管内面の周方向の全域に略均等に噴射することを特徴と
する継目無金属管の製造方法。(1) Seamless metal that simultaneously injects cooling water and lubricant into the raw pipe when the plug attached to the tip of the plug bar is inserted into the raw pipe and the raw pipe is rolled between the rolling roll and the plug. A seamless metal pipe manufacturing method characterized in that cooling water is sprayed substantially uniformly over the entire circumferential area of the inner surface of the raw tube, and lubricant is sprayed substantially uniformly over the entire circumferential area of the inner surface of the raw tube. Method of manufacturing tubes.
の圧延ロール間に配置するとともに、プラグバーの先端
部に冷却水噴射口と潤滑剤噴射口を設け、冷却水噴射口
に連通する冷却水供給管路と潤滑剤噴射口に連通する潤
滑剤供給管路のそれぞれをプラグバーの内外に延設して
なる継目無金属管の製造装置において、冷却水噴射口は
、冷却水を素管内面の周方向の全域に略均等に噴射可能
とする範囲に設けられ、潤滑剤噴射口は、潤滑剤を素管
内面の周方向の全域に略均等に噴射可能とする範囲に設
けられることを特徴とする継目無金属管の製造装置。(2) A plug attached to the tip of the plug bar is arranged between a pair of rolling rolls, and a cooling water injection port and a lubricant injection port are provided at the tip of the plug bar, and the cooling water is communicated with the cooling water injection port. In a seamless metal pipe manufacturing device in which a supply pipe and a lubricant supply pipe communicating with a lubricant injection port are installed inside and outside a plug bar, the cooling water injection port is used to direct cooling water to the inner surface of the raw pipe. The lubricant injection port is provided in a range that allows the lubricant to be injected substantially evenly over the entire circumferential area of the inner surface of the raw pipe. Equipment for manufacturing seamless metal pipes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29679286A JPS63154207A (en) | 1986-12-15 | 1986-12-15 | Method and device for manufacturing seamless metallic tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29679286A JPS63154207A (en) | 1986-12-15 | 1986-12-15 | Method and device for manufacturing seamless metallic tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63154207A true JPS63154207A (en) | 1988-06-27 |
Family
ID=17838190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29679286A Pending JPS63154207A (en) | 1986-12-15 | 1986-12-15 | Method and device for manufacturing seamless metallic tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63154207A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0671309A (en) * | 1992-08-26 | 1994-03-15 | Nkk Corp | Method for rolling seamless steel tube by using mandrel mill |
| WO1999033588A1 (en) * | 1997-12-23 | 1999-07-08 | Mannesmann Ag | Method and device for descaling pipes |
| WO2011154133A1 (en) | 2010-06-08 | 2011-12-15 | Coating Management Switzerland Gmbh | Method for producing seamless pipes |
| DE102011012761A1 (en) | 2011-03-01 | 2012-05-24 | Sms Meer Gmbh | Method for producing tube blank, involves rolling heated full block, perforating heated full block to hollow block by inner tool with piercer, and deoxidizing hollow block inner surface during rolling and/or perforating |
| US20120210761A1 (en) * | 2009-03-03 | 2012-08-23 | Sumitomo Metal Industries, Ltd. | Plug, Piercing-Rolling Mill, and Method of Producing Seamless Tube by Using the Same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60130406A (en) * | 1983-12-20 | 1985-07-11 | Kawasaki Steel Corp | Method and device for manufacturing seamless steel pipe |
-
1986
- 1986-12-15 JP JP29679286A patent/JPS63154207A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60130406A (en) * | 1983-12-20 | 1985-07-11 | Kawasaki Steel Corp | Method and device for manufacturing seamless steel pipe |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0671309A (en) * | 1992-08-26 | 1994-03-15 | Nkk Corp | Method for rolling seamless steel tube by using mandrel mill |
| WO1999033588A1 (en) * | 1997-12-23 | 1999-07-08 | Mannesmann Ag | Method and device for descaling pipes |
| US20120210761A1 (en) * | 2009-03-03 | 2012-08-23 | Sumitomo Metal Industries, Ltd. | Plug, Piercing-Rolling Mill, and Method of Producing Seamless Tube by Using the Same |
| US8544306B2 (en) * | 2009-03-03 | 2013-10-01 | Nippon Steel & Sumitomo Metal Corporation | Plug, piercing-rolling mill, and method of producing seamless tube by using the same |
| WO2011154133A1 (en) | 2010-06-08 | 2011-12-15 | Coating Management Switzerland Gmbh | Method for producing seamless pipes |
| DE102011012761A1 (en) | 2011-03-01 | 2012-05-24 | Sms Meer Gmbh | Method for producing tube blank, involves rolling heated full block, perforating heated full block to hollow block by inner tool with piercer, and deoxidizing hollow block inner surface during rolling and/or perforating |
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