JPS59206106A - Oil film bearing for rolling mill - Google Patents
Oil film bearing for rolling millInfo
- Publication number
- JPS59206106A JPS59206106A JP7967783A JP7967783A JPS59206106A JP S59206106 A JPS59206106 A JP S59206106A JP 7967783 A JP7967783 A JP 7967783A JP 7967783 A JP7967783 A JP 7967783A JP S59206106 A JPS59206106 A JP S59206106A
- Authority
- JP
- Japan
- Prior art keywords
- sleeve
- circumferential surface
- bearing
- neck
- roll
- 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
- B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
- B21B31/07—Adaptation of roll neck bearings
- B21B31/074—Oil film bearings, e.g. "Morgoil" bearings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
- B21B31/07—Adaptation of roll neck bearings
- B21B2031/072—Bearing materials
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Sliding-Contact Bearings (AREA)
Abstract
Description
【発明の詳細な説明】 不発明は、圧延機用油膜軸受の改良に関する。[Detailed description of the invention] The invention relates to improvements in oil film bearings for rolling mills.
圧延機のワークロールやバックアップロールなどの軸部
の軸受構造として採用されている油膜軸受構造金弟１図
及びその■−■矢視断面である第２図に示す。１は圧延
機のロール（回転軸）で、そのテーパネック部２の外周
面２ａにはスリーブ３が嵌め込んである。４は回転軸１
を支承するロールチョック軸受箱で、内周面５ａにホワ
イトメタル、ケルメツト等の材料を内張したシェル５が
前記スリーブ３を囲繞して内股しである。シェル５とス
リーブ３との間の隙間に潤滑油を供給するため、軸受箱
４には給油孔６が、シェル５には給油ロア及びポケット
８が設けである。給油孔６から供給されシェル５とスリ
ーブ３との間に入る潤滑油の作用により、回転軸１とス
リーブ３より構成される軸は、軸受箱４とシェル５エク
構成される軸受にオイルフローティングし次状態で接す
ることなく回転し支持される。An oil film bearing structure adopted as a bearing structure for shafts of work rolls, backup rolls, etc. of rolling mills is shown in Fig. 1 and Fig. 2, which is a sectional view taken along the line 1--2. Reference numeral 1 denotes a roll (rotating shaft) of a rolling mill, and a sleeve 3 is fitted into the outer peripheral surface 2a of a tapered neck portion 2 of the roll. 4 is rotation axis 1
The sleeve 3 is surrounded by a shell 5 whose inner peripheral surface 5a is lined with a material such as white metal or kelmet. In order to supply lubricating oil to the gap between the shell 5 and the sleeve 3, the bearing box 4 is provided with an oil supply hole 6, and the shell 5 is provided with an oil supply lower part and a pocket 8. Due to the action of the lubricating oil supplied from the oil supply hole 6 and entering between the shell 5 and the sleeve 3, the shaft composed of the rotating shaft 1 and the sleeve 3 is oil-floated in the bearing composed of the bearing box 4 and the shell 5. In the next state, they rotate and are supported without touching.
この工うな形式の軸受構造において、近年圧延機の使用
条件が厳しくなり、荷重、速度とも限界状態で使用され
る傾向にあるため、軸受部の温度上昇並びに高荷重によ
り軸受メタルの焼付きや亀裂の生成などの要因になって
いると共に、回転軸１のテーノ々ネック部２とスリーブ
３とのテーノやによる嵌合部にも高荷重によるローラの
曲がりや圧延材通過時の微動撮動などによる焼付現象や
亀裂の生成などが起き、圧延機の保守上問題となってい
る６
本発明は上記状況にかんがみてなされたもので、その目
的とするところは、圧延機の油膜軸受における回転軸の
チーｉ＋ネック部とスリーブとの嵌合部の焼損や亀裂の
発生を防止し、もって軸受部の寿命延長を図ることにあ
る。In this type of bearing structure, rolling mill operating conditions have become stricter in recent years, and there is a tendency for rolling mills to be used at their limits in terms of load and speed. This has caused the bearing metal to seize and crack due to increased temperatures and high loads. In addition to being a factor such as the generation of rollers, bending of the roller due to high load and slight movement when the rolled material passes through the fitting part between the roller neck 2 and sleeve 3 of the rotating shaft 1 due to the roller bending, etc. Seizure phenomena and the formation of cracks occur, posing problems in the maintenance of rolling mills.6 The present invention has been made in view of the above circumstances, and its purpose is to improve the maintenance of the rotating shaft in oil film bearings of rolling mills. The purpose of this invention is to prevent burnout and cracking of the fitting portion between the neck portion and the sleeve, thereby extending the life of the bearing portion.
上記目的を達成する不発明の要旨は、ロールのチーｉＲ
ネック部に緊密に嵌入したスリーブと軸受箱に前記スリ
ーブ全囲繞して内設したシェルとの間に油膜を形成する
ようにした油膜軸受において、前記ロールのテーパネッ
ク部の外周面と前記スリーブの内周面とにセラミックコ
ーティングを施したことを特徴とする。The gist of the non-invention that achieves the above object is
In an oil film bearing in which an oil film is formed between a sleeve tightly fitted into a neck portion and a shell provided inside the bearing box to completely surround the sleeve, the outer circumferential surface of the tapered neck portion of the roll and the inner surface of the sleeve It is characterized by a ceramic coating applied to the circumferential surface.
以下、本発明に係る圧延機用油膜軸受全図面に示す実施
例に基づき詳細に説明する。EMBODIMENT OF THE INVENTION Hereinafter, the oil film bearing for a rolling mill according to the present invention will be described in detail based on the embodiments shown in the drawings.
一実施例の断面構造を表わす第３図において、ロール１
のテーパネック部２の外周面２ａにはテーパスリーブ３
が嵌合されており、このテーパスリーブ３はテーパネッ
ク部２端に嵌め込んだスリーブ押え９及び締付ナラ）１
０により緊密に締付は固定される。軸受箱４には前記チ
ーパスｌ ｌ−ブ３の外周面を囲繞してシェル５が内設
されている。シェル５の円周面にはホワイトメタルやケ
ルメ・ント等の材料が内張すされている。、軸受箱４及
びシェル５には、スリーブ３とシェル５との間の隙間に
潤滑油全供給するための給油孔、給油口及びポケット等
が形成されている。以上の構成は第１．２図に示し之従
来のものと同じである。In FIG. 3 showing the cross-sectional structure of one embodiment, roll 1
A tapered sleeve 3 is provided on the outer peripheral surface 2a of the tapered neck portion 2.
This tapered sleeve 3 has a sleeve presser 9 fitted into the end of the tapered neck portion 2 and a tightening nut 1
0, the tightening is tightly fixed. A shell 5 is provided inside the bearing box 4 so as to surround the outer circumferential surface of the above-mentioned high pass l l-b 3. The circumferential surface of the shell 5 is lined with a material such as white metal or Kelmet. , the bearing box 4 and the shell 5 are formed with an oil supply hole, an oil supply port, a pocket, etc. for completely supplying lubricating oil to the gap between the sleeve 3 and the shell 5. The above configuration is the same as the conventional one shown in FIG. 1.2.
このような形式の軸受においては、圧延材Ａが圧延中に
ロール１に与える微動振動及び軸受箱４に与えられる高
圧力並びにロール１の回転速度等が限界状態で連続して
使用されると、しばしばネック部外周面２ａとスリーブ
内周面３ａの間で７レツチングコロージヨンが発生し、
このフレツチングコロージョンが進展して焼付現象を起
こし、更には亀裂が発生し、圧延機の保守上大きな問題
となっていたのであるが、不発明では、フレツチングの
発生個所である前記テーパネック部２の外周面２ａとテ
ーパスリーブ３の内周面３ａとにセラミックコーティン
グを施したのである。In such a type of bearing, if the rolling material A is continuously used under the limit conditions such as the micro-vibration given to the roll 1 during rolling, the high pressure given to the bearing box 4, and the rotational speed of the roll 1, etc. 7 retching corrosion often occurs between the neck outer peripheral surface 2a and the sleeve inner peripheral surface 3a,
This fretting corrosion progressed and caused a seizure phenomenon, which in turn caused cracks, posing a major maintenance problem for the rolling mill. The outer peripheral surface 2a and the inner peripheral surface 3a of the tapered sleeve 3 are coated with a ceramic coating.
次に、このチー・母ネック部外周面２ａ及びテーパやス
リーブ内周面３ａにセラミックコーティングを施した構
造の軸受の特性試験方法及びその結果について示す。Next, a method and results of testing the characteristics of a bearing having a structure in which ceramic coating is applied to the outer circumferential surface 2a of the chi/base neck portion and the inner circumferential surface 3a of the taper and sleeve will be described.
試験機としては、第４図に示すように圧延機をシミュレ
ートしたものを採用した。この試験機においては、圧延
機用パックアンプロールに相当するシャフト１１の先端
部のみ？試験軸受とし、架台１２上に同定軸受１３．１
４を設けてこれらによってシャフト１１を回転自在に支
持し、その一端にカップリング１５を介して減速機１６
、更にカップリング１５七介して電動機１７を連結して
、所定の回転をシャフト１１に与えるようにする一方、
シャフト１１の他端（先端部）を不発明の油膜棚受１８
と同様の構造とする。この油膜軸受１８の構造は第３図
に示したものと同じ構成であるので、同一部材全同一番
号で示し、その説明は省略する。尚、軸受箱４の上部に
は圧下シリンダ１９を設置して所定の圧下荷重と微動′
！Ｍ￥Ｉｈをシャフト１１に与えられるように設定しで
ある。The testing machine used was one that simulated a rolling mill as shown in Figure 4. In this test machine, only the tip of the shaft 11, which corresponds to the pack-and-roll for a rolling mill, is tested. As a test bearing, the identified bearing 13.1 is placed on the pedestal 12.
4 are provided to rotatably support the shaft 11, and a reduction gear 16 is connected to one end of the shaft 11 via a coupling 15.
Furthermore, an electric motor 17 is connected via a coupling 15 to apply a predetermined rotation to the shaft 11, while
The other end (tip part) of the shaft 11 is attached to an uninvented oil film shelf support 18.
The structure is similar to . Since the structure of this oil film bearing 18 is the same as that shown in FIG. 3, all the same members are designated by the same numbers and their explanations will be omitted. A reduction cylinder 19 is installed on the upper part of the bearing box 4 to apply a predetermined reduction load and fine movement.
! It is set so that M\Ih can be applied to the shaft 11.
ホットストリップミルのバックアップロール軸端部にお
ける圧延中の状態を例にとり試験状況を述べると、締付
ナツト１０によりスリーブ押え９を介してスリーブ３に
、軸方向に実機相当の締付力を与えて、シャフト１１の
テーパやネック部外周面２ａとスリーブ内周面３ａとの
面圧が約５〜１０ Ｋｔｉ／ｃｒｌとなるようにスリー
ブ３を締付け、軸受箱４には、圧下シリンダ１９で実機
相当の荷重（面圧約２５０にμ讐）を与え、シャフト１
１には２０〜３００ ｒｐｍ （仕上げ第１〜第７スタ
ンド相当）の回転をそれぞれ与えて、チーＡネック部外
周面２ａ、スリーブ内周面３ａにおけるフレツチング発
生状況を調べた。本発明に係る、ロールネック部外周面
及びスリーブ内周面にセラミックコーティングを施した
ものと、従来の一切セラミックコーティングを施さない
ものと、一方にのみセラミックコーテイングを施したも
のとの比較結果を表１に示す。試験条件は、組込前油塗
布（無給油）、荷重（面圧）２００〜３００ Ｋｆ／ｃ
ｔＩ、周波数Ｉ Ｑ ｃｐｓであり、表中、Ｘ印はフレ
ツチング発生を示し、○印はフレツチングが発生しなか
ったことを示す表 １
しｆＪ
しに工っでもフレンチは生ぜず、従来のものあるいはス
リーブのみにセラミックコーティングしたものに比べ、
顕著な特性を示す。To describe the test situation, taking as an example the state during rolling at the end of the back-up roll shaft of a hot strip mill, a tightening force equivalent to the actual machine was applied to the sleeve 3 in the axial direction by the tightening nut 10 via the sleeve holder 9. , the sleeve 3 is tightened so that the surface pressure between the taper of the shaft 11 and the outer circumferential surface 2a of the neck part and the inner circumferential surface 3a of the sleeve is approximately 5 to 10 Kti/crl, and the bearing box 4 is equipped with a reduction cylinder 19 equivalent to the actual machine. Apply a load (surface pressure of about 250 μm) to the shaft 1
No. 1 was rotated at 20 to 300 rpm (corresponding to the first to seventh finishing stands), and the occurrence of fretting on the outer circumferential surface 2a of the Chi A neck portion and the inner circumferential surface 3a of the sleeve was investigated. Comparison results are shown between the present invention in which ceramic coating is applied to the outer peripheral surface of the roll neck and the inner peripheral surface of the sleeve, a conventional example in which no ceramic coating is applied at all, and an example in which ceramic coating is applied only to one side. Shown in 1. Test conditions were: oil application before assembly (no lubrication), load (surface pressure) 200 to 300 Kf/c
tI, frequency I Q cps. Compared to those with ceramic coating only on the sleeve,
Showing remarkable properties.
以上の如く、本発明に係る圧延機用油膜軸受に↓れば、
互いに嵌合し合うテーパネック部の外周面とスリーブの
内周面とにセラミックコーティングを施したので、この
嵌合部のフレツチング現象の発生が少ガくなり、それに
起因する焼付や亀裂が生じるまでの時間が格段に長くな
り、つ壕り軸受寿命が延び、ロール交換時の保守も容易
となる。As described above, the oil film bearing for a rolling mill according to the present invention has the following characteristics:
Ceramic coating is applied to the outer circumferential surface of the tapered neck part and the inner circumferential surface of the sleeve that fit into each other, which reduces the occurrence of fretting phenomenon at this fitting part, and prevents the occurrence of seizures and cracks caused by it. The time taken is significantly longer, the life of the trench bearing is extended, and maintenance when replacing rolls is easier.
第１図及び第２図は従来の圧延機用油膜軸受の断面図と
そのＩＩ−ＩＩ矢視断面図、第３図は不発明に係る軸受
の断面図、第４図はその特性を試験する試験機の断面図
である。
図面中、
１はロール、
２はテーパネック部、
２ａはテーパネック部の外周面、
３はスリーブ、
３ａはスリーブの円周面、
４け軸受箱、
５はシェル、
９はスリーブ押え、
１０は締付ナツト、
１８は油膜軸受、
１９は圧下シリンダである。
特許出願人
三菱重工業株式会社
復代理人
弁理士 光 石 士 部（他１名）
第１図
第２図Figures 1 and 2 are a cross-sectional view of a conventional oil film bearing for a rolling mill and a cross-sectional view taken along arrow II-II, Figure 3 is a cross-sectional view of a bearing according to the invention, and Figure 4 is a test of its characteristics. It is a sectional view of a testing machine. In the drawings, 1 is the roll, 2 is the tapered neck part, 2a is the outer circumferential surface of the tapered neck part, 3 is the sleeve, 3a is the circumferential surface of the sleeve, 4-piece bearing box, 5 is the shell, 9 is the sleeve holder, and 10 is the tightening part. Nut, 18 is an oil film bearing, and 19 is a reduction cylinder. Patent Applicant: Mitsubishi Heavy Industries, Ltd. Sub-Agent Patent Attorney: Shibu Mitsuishi (and 1 other person) Figure 1 Figure 2
Claims (1)
受箱に前記スリーブを囲繞して内設したシェルとの間に
油膜を形成するようにした油膜軸受において、前記ロー
ルのテーパネック部の外周面と前記スリーブの内周面と
にセラミックコーティングを施したことを特徴とする圧
延機用油膜軸受。In an oil film bearing in which an oil film is formed between a sleeve tightly fitted into a tapered neck portion of a roll and a shell provided inside a bearing box surrounding the sleeve, the outer circumferential surface of the tapered neck portion of the roll and the sleeve An oil film bearing for a rolling mill, characterized in that a ceramic coating is applied to the inner peripheral surface of the bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7967783A JPS59206106A (en) | 1983-05-07 | 1983-05-07 | Oil film bearing for rolling mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7967783A JPS59206106A (en) | 1983-05-07 | 1983-05-07 | Oil film bearing for rolling mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59206106A true JPS59206106A (en) | 1984-11-21 |
Family
ID=13696825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7967783A Pending JPS59206106A (en) | 1983-05-07 | 1983-05-07 | Oil film bearing for rolling mill |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59206106A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6417444U (en) * | 1987-07-21 | 1989-01-27 | ||
| KR100365463B1 (en) * | 1998-08-24 | 2002-12-18 | 모건 컨스트럭션 캄파니 | Rolling mill oil film bearing |
| WO2011037825A3 (en) * | 2009-09-28 | 2011-06-23 | Siemens Industry, Inc. | Sleeve for oil film bearing |
-
1983
- 1983-05-07 JP JP7967783A patent/JPS59206106A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6417444U (en) * | 1987-07-21 | 1989-01-27 | ||
| KR100365463B1 (en) * | 1998-08-24 | 2002-12-18 | 모건 컨스트럭션 캄파니 | Rolling mill oil film bearing |
| WO2011037825A3 (en) * | 2009-09-28 | 2011-06-23 | Siemens Industry, Inc. | Sleeve for oil film bearing |
| CN102510955A (en) * | 2009-09-28 | 2012-06-20 | 西门子工业公司 | Sleeve for oil film bearing |
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