JPH11277446A - Grinding wheel for grinding on-line roll - Google Patents
Grinding wheel for grinding on-line rollInfo
- Publication number
- JPH11277446A JPH11277446A JP7972698A JP7972698A JPH11277446A JP H11277446 A JPH11277446 A JP H11277446A JP 7972698 A JP7972698 A JP 7972698A JP 7972698 A JP7972698 A JP 7972698A JP H11277446 A JPH11277446 A JP H11277446A
- Authority
- JP
- Japan
- Prior art keywords
- grinding
- grindstone
- grinding wheel
- peripheral side
- 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.)
- Withdrawn
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、オンラインロール
研削用砥石に関する。The present invention relates to an online roll grinding wheel.
【０００２】[0002]
【従来の技術】圧延ロールをオンラインで研削する砥石
は、圧延ラインの稼動率を低下させることなく、ロール
の偏摩耗を矯正することができ、好ましい。このような
オンラインロール研削用砥石として、特開平１−３０１
０７４号公報には、円筒形状砥石の先端面（フェイス研
削面）が圧延ロールの外周面に押圧された状態でロール
外周面との滑り摩擦により、ロール外周面をオンライン
で研削する砥石であって、円筒形状を成す第１砥石の外
周側および内周側の少なくとも一方に、第１砥石とは結
合剤が異なり第１砥石よりも弾性率が低い第２砥石を一
体的に固設したオンラインロール研削用二重構造砥石が
開示されている。2. Description of the Related Art A grinding wheel for grinding a rolling roll online is preferable because it can correct uneven wear of the roll without lowering the operation rate of the rolling line. As such a grindstone for online roll grinding, JP-A-1-301
No. 074 discloses a grindstone which grinds a roll outer peripheral surface online by sliding friction with a roll outer peripheral surface in a state where a tip end surface (face ground surface) of a cylindrical grinding wheel is pressed against an outer peripheral surface of a rolling roll. An online roll in which a second grindstone having a binder different from that of the first grindstone and having a lower elastic modulus than the first grindstone is integrally fixed to at least one of an outer peripheral side and an inner peripheral side of the first grindstone having a cylindrical shape. A dual structure grinding wheel for grinding is disclosed.
【０００３】このような研削用砥石としては、一般的
に、ビトリファイド砥石が用いられる。ビトリファイド
砥石は優れた研削作用を有する反面、弾性率が高く衝撃
に弱く、オンラインでロールを研削すると、圧延に伴う
ロールの振動或いはロールの偏摩耗に起因して、砥石の
先端面（フェイス研削面）周縁部の角部にチッピング
（欠損）や割れ等の損傷が発生する問題があった。これ
は弾性率が高い他の砥石でも同様に生じる現象である。
そこで、上記のような弾性率の異なる砥石を外周側と内
周側の何れか一方又は両方に設けた、二重構造又は三重
構造の砥石が開発された。弾性率の高い第１砥石によっ
て優れた研削作用が得られる一方、その内周側または外
周側、あるいは両側に設けられた弾性率の低い第２砥石
によって耐衝撃性が向上し、ロールの振動やロールの外
周面の凹凸との衝突があってもこれに拘らず、チッピン
グや割れ等の損傷の発生が防止され、オンラインでのロ
ール研削が可能となった。[0003] As such a grinding wheel, a vitrified grinding wheel is generally used. Vitrified whetstones have an excellent grinding effect, but have a high elasticity and are vulnerable to impact. When a roll is ground online, the vibration of the rolls caused by rolling or the uneven wear of the rolls causes the end face of the whetstone (face grinding surface). ) There was a problem that damage such as chipping (breakage) and cracks occurred at the corners of the peripheral portion. This is a phenomenon that also occurs in other grinding wheels having a high elastic modulus.
Therefore, a double-structure or triple-structure whetstone in which whetstones having different elastic moduli as described above are provided on one or both of the outer circumference side and the inner circumference side has been developed. While the excellent grinding action is obtained by the first grindstone having a high elastic modulus, the impact resistance is improved by the second grindstone having a low elastic modulus provided on the inner peripheral side or the outer peripheral side, or on both sides thereof. Irrespective of the collision with the unevenness of the outer peripheral surface of the roll, the occurrence of damage such as chipping and cracking was prevented, and online roll grinding became possible.
【０００４】[0004]
【発明が解決しようとする課題】上記従来技術の二重構
造の砥石では、第１と第２の砥石は円筒状をなしてい
る。このため砥石が薄くなって砥石全体の剛性が小さく
なって来るとビビリ振動やチャタリングが発生し、砥石
とロール表面との間で焼付を起したり、圧延ロールにチ
ャタリングマークが発生するという問題がある。In the above-described conventional double-structured grinding wheel, the first and second grinding wheels have a cylindrical shape. For this reason, when the grindstone becomes thinner and the rigidity of the whole grindstone decreases, chattering and chattering occur, causing seizure between the grindstone and the roll surface and chattering marks on the rolling roll. is there.
【０００５】すなわちオンラインでロールを研削しよう
とすると、圧延に伴なうロールの振動、被圧延材の側端
部に対応するロール表面部分に生ずる偏摩耗、圧延油の
介在等によるロールと砥石間のスリップ等により、砥石
表面に金属焼付きを生じ、いわゆるビビリ振動、又はチ
ャタリングを生ずるという問題があった。本発明はこの
ような問題を解決したオンラインロール研削用砥石を提
供することを目的とするものである。[0005] In other words, when trying to grind the roll online, the vibration of the roll due to rolling, uneven wear generated on the roll surface corresponding to the side end of the material to be rolled, the gap between the roll and the grinding wheel due to the intervening rolling oil, etc. There is a problem that a metal seizure occurs on the grindstone surface due to the slip or the like, and so-called chatter vibration or chattering occurs. An object of the present invention is to provide an online roll grinding wheel that solves such a problem.
【０００６】[0006]
【課題を解決するための手段】本発明は上記問題点を解
決するためになされたもので、フェイス研削砥石におい
て、弾性係数の異なる異種の砥石を内周側と外周側に取
付けた二重円筒構造とし、弾性係数の小さい第１の砥石
を内周側に、弾性係数の大きい第２の砥石を外周側に互
いに接触させて配設すると共に、砥石が減耗するに従っ
て第２の砥石の露出面積が大きくなるように、第１、第
２の砥石の接触面を円錐台形に形成したことを特徴とす
るオンラインロール研削用砥石を提供するものである。SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems. In a face grinding wheel, a double cylinder in which different types of wheels having different elastic coefficients are attached to an inner peripheral side and an outer peripheral side. A first grindstone having a small elastic coefficient is disposed on the inner peripheral side, and a second grindstone having a large elastic coefficient is disposed on the outer peripheral side so as to be in contact with each other, and the exposed area of the second grindstone as the grindstone wears out. The present invention provides an online roll grinding grindstone characterized in that the contact surfaces of the first and second grindstones are formed in a truncated conical shape so that the diameter of the grinding wheel increases.
【０００７】前記円錐台形のテーパを円錐の頂角で６０
〜１２０度とすると、砥石が減耗して薄くなり、砥石全
体の剛性が低下した時に、弾性係数の大きい第２の砥石
の量が増加して砥石全体の剛性の低下を適切に補償する
ことができ好適である。上記テーパを円錐の頂角で６０
度未満とすると、砥石が薄くなった時第２の砥石の量が
余り増加せず、砥石全体の剛性の低下を補償する効果が
少なくなる。一方、１２０度を越えると、テーパが大き
くなり過ぎて、適切な二重構造を形成することが困難に
なる。上記テーパの値は、円錐の頂角が９０度近傍、す
なわち８０〜１００度程度が最も好適であり、推奨され
る。[0007] The frusto-conical taper has a cone apex angle of 60.
When it is set to about 120 degrees, the grindstone is worn and thinned, and when the rigidity of the whole grindstone decreases, the amount of the second grindstone having a large elastic coefficient increases to appropriately compensate for the decrease in the rigidity of the whole grindstone. It is preferable. The taper is 60
When the degree is less than the degree, when the grindstone becomes thin, the amount of the second grindstone does not increase so much, and the effect of compensating for the decrease in rigidity of the whole grindstone decreases. On the other hand, if it exceeds 120 degrees, the taper becomes too large, and it becomes difficult to form an appropriate double structure. The value of the taper is most preferably set so that the apex angle of the cone is around 90 degrees, that is, about 80 to 100 degrees.
【０００８】[0008]
【発明の実施の形態】以下図面を参照して本発明の実施
の形態を説明する。フェイス研削砥石を用いてオンライ
ンで圧延ロールの表面を研削すると、ロール面の偏摩
耗、振動、滑り等によって、図４に示すように、砥石１
の研削面に金属焼き付き８を生じ、ビビリ振動を起こし
たり、あるいは図５に示すように、チャタリングにより
圧延ロール１１の表面にチャタリングマーク１２、１３
を生ずる。例えば、熱間仕上圧延機の第６スタンドに従
来の砥石（図６参照）を適用した時のチャタリング発生
例を挙げると、次のとおりである。Embodiments of the present invention will be described below with reference to the drawings. When the surface of the rolling roll is ground online using a face grinding whetstone, the whetstone 1 is crushed as shown in FIG.
The metal seizure 8 occurs on the ground surface of the roll, causing chattering vibration, or, as shown in FIG. 5, chattering marks 12, 13 on the surface of the rolling roll 11 by chattering.
Is generated. For example, the following is an example of chattering occurring when a conventional grindstone (see FIG. 6) is applied to the sixth stand of the hot finishing mill.
【０００９】 の周波数のチャタリングマーク１２、１３を生じた。[0009] The chattering marks 12 and 13 having the frequency of?
【００１０】図６は従来の二重構造の砥石２１を示す縦
断面図である。この砥石は回転軸２６の端面に取付けた
円盤２７に基板２４を取付け、これに異なる種類の外周
側砥石２２と内周側砥石２３を二重円筒状に取付け、フ
ェイス２５でロールの表面を研削する砥石である。その
特徴は、弾性率の異なる外周側砥石２２と内周側砥石２
３を二重円筒状に形成することによって、上記欠点を改
善することにある。この技術は改善効果があるが、砥石
が薄くなると、剛性が低下するために、チャタリングや
ビビリ振動を起こすことは避けられない。FIG. 6 is a longitudinal sectional view showing a conventional double-structured grinding wheel 21. As shown in FIG. This grindstone has a substrate 24 attached to a disk 27 attached to the end face of a rotating shaft 26, and different types of outer peripheral grindstones 22 and inner peripheral grindstones 23 are attached in a double cylindrical shape, and the face of the roll is ground by a face 25. It is a whetstone to do. The feature is that the outer grinding wheel 22 and the inner grinding wheel 2 having different elastic moduli
The object of the present invention is to improve the above-mentioned drawbacks by forming 3 in a double cylindrical shape. Although this technique has an improvement effect, chattering and chattering are inevitable when the grindstone becomes thin because the rigidity is reduced.
【００１１】本発明は、図１に示すように、弾性係数の
異なる異種の砥石を内周側と外周側に取付けた二重構造
とし、弾性係数の小さい第１の砥石３を内周側に、弾性
係数の大きい第２の砥石２を外周側に互いに接触させて
配設することは図６に示す従来の技術と同様であるが、
内周側の第１の砥石３と外周側の第２の砥石２を円筒形
に形成するのではなく、砥石が減耗するに従って弾性係
数の大きい第２の砥石２が砥石のフェイス５に露出する
面積が大きくなるように、第１の砥石３と第２の砥石２
の接触面９を円錐台形に形成する。このようにすること
によって、図２に示すように、砥石１が厚い状態の時に
は砥石全体の剛性が高く内周側の弾性係数の小さい砥石
３が大きな面積で露出し、弾性係数の小さい砥石３が主
体となってロールを研削する。図３に示すように、砥石
１が薄くなった時には、外周側の弾性係数の大きい砥石
２の露出面積が大きくなって、弾性係数の大きい砥石２
が主として研削する。従って、砥石１の厚さの変化に係
わらず、研削能が一定、ないし一定に近い状態で研削す
ることができ、常にビビリ振動やチャタリングを発生し
ないようにすることが可能となった。As shown in FIG. 1, the present invention has a double structure in which different types of grindstones having different elastic coefficients are attached to an inner peripheral side and an outer peripheral side, and a first grindstone 3 having a small elastic coefficient is disposed on an inner peripheral side. The arrangement of the second grindstones 2 having a large elastic coefficient in contact with each other on the outer peripheral side is the same as in the prior art shown in FIG.
The first grindstone 3 on the inner peripheral side and the second grindstone 2 on the outer peripheral side are not formed in a cylindrical shape, but the second grindstone 2 having a large elastic coefficient is exposed on the face 5 of the grindstone as the grindstone wears out. The first grindstone 3 and the second grindstone 2 are arranged so that the area becomes large.
Is formed in the shape of a truncated cone. By doing so, as shown in FIG. 2, when the grindstone 1 is thick, the grindstone 3 having a high rigidity of the whole grindstone and a small elastic coefficient on the inner peripheral side is exposed in a large area, and the grindstone 3 having a small elastic coefficient is exposed. Mainly grinds the roll. As shown in FIG. 3, when the grindstone 1 becomes thin, the exposed area of the grindstone 2 with a large elastic coefficient on the outer peripheral side increases, and the grindstone 2 with a large elastic coefficient is increased.
Mainly grinds. Therefore, regardless of the change in the thickness of the grindstone 1, the grinding power can be ground at a constant or nearly constant level, and it is possible to prevent chattering and chattering from occurring at all times.
【００１２】弾性係数の大きい砥石としては、弾性係数
が２０００〜７０００ｋｇ／ｍｍ2程度の砥石、弾性係
数の小さい砥石としては、弾性係数が１００〜１０００
ｋｇ／ｍｍ2 程度の砥石を用いるとよい。例えばフェノ
ール樹脂やゴムを結合剤とする砥石などを採用すればよ
い。円錐台形のテーパは、円錐頂角で６０〜１２０度と
し、砥石の大きさ、種類、組み合わせ等により適正値を
求めることができる。A grindstone having a large elastic coefficient has a modulus of about 2000 to 7000 kg / mm 2, and a grindstone having a small modulus has a modulus of 100 to 1000.
It is preferable to use a grindstone of about kg / mm 2 . For example, a grindstone using phenol resin or rubber as a binder may be employed. The frustoconical taper has a cone apex angle of 60 to 120 degrees, and an appropriate value can be obtained depending on the size, type, combination, and the like of the grindstone.
【００１３】[0013]
【発明の効果】本発明によれば、圧延ロールのオンライ
ン研削において、ビビリ振動やチャタリングの発生を完
全に防止することが可能となった。According to the present invention, chattering and chattering can be completely prevented in on-line grinding of a rolling roll.
【図１】実施例の研削砥石の縦断面図である。FIG. 1 is a longitudinal sectional view of a grinding wheel of an embodiment.
【図２】実施例の作動説明図である。FIG. 2 is an operation explanatory view of the embodiment.
【図３】実施例の作動説明図である。FIG. 3 is an operation explanatory view of the embodiment.
【図４】従来の研削砥石の問題点を説明する模式斜視図
である。FIG. 4 is a schematic perspective view illustrating a problem of a conventional grinding wheel.
【図５】チャタリングの説明図である。FIG. 5 is an explanatory diagram of chattering.
【図６】従来の研削砥石の縦断面図である。FIG. 6 is a longitudinal sectional view of a conventional grinding wheel.
１ 砥石 ２ 第２の砥石 ３ 第１の砥石 ４ 基板 ５ フェイス ６ 回転軸 ７ 円盤 ８ 焼き付き １１ 圧延ロール １２、１３ チャタリングマーク ２１ 砥石 ２２ 外周側砥石 ２３ 内周側砥石 ２４ 基板 ２５ フェイス ２６ 回転軸 ２７ 円盤 DESCRIPTION OF SYMBOLS 1 Whetstone 2 Second whetstone 3 First whetstone 4 Substrate 5 Face 6 Rotation axis 7 Disk 8 Burn-in 11 Rolling roll 12, 13 Chattering mark 21 Whetstone 22 Outer side whetstone 23 Inner circumference whetstone 24 Substrate 25 Face 26 Rotation axis 27 disk
Claims (2)
異なる異種の砥石を内周側と外周側に取付けた二重円筒
構造とし、弾性係数の小さい第１の砥石を内周側に、弾
性係数の大きい第２の砥石を外周側に互いに接触させて
配設すると共に、砥石が減耗するに従って第２の砥石の
露出面積が大きくなるように、第１、第２の砥石の接触
面を円錐台形に形成したことを特徴とするオンラインロ
ール研削用砥石。1. A face grinding grindstone having a double cylindrical structure in which different kinds of grindstones having different elastic coefficients are attached to an inner peripheral side and an outer peripheral side, and a first grindstone having a small elastic coefficient is disposed on an inner peripheral side. The large second grindstones are arranged in contact with each other on the outer peripheral side, and the contact surface of the first and second grindstones is formed into a truncated cone so that the exposed area of the second grindstones increases as the grindstones wear out. An on-line roll grinding wheel characterized by being formed.
〜１２０度としたことを特徴とする請求項１記載のオン
ラインロール研削用砥石。2. The frustoconical taper having a cone apex angle of 60
2. The grinding wheel for online roll grinding according to claim 1, wherein the angle is set to 120 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7972698A JPH11277446A (en) | 1998-03-26 | 1998-03-26 | Grinding wheel for grinding on-line roll |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7972698A JPH11277446A (en) | 1998-03-26 | 1998-03-26 | Grinding wheel for grinding on-line roll |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11277446A true JPH11277446A (en) | 1999-10-12 |
Family
ID=13698218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7972698A Withdrawn JPH11277446A (en) | 1998-03-26 | 1998-03-26 | Grinding wheel for grinding on-line roll |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11277446A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005522337A (en) * | 2002-04-11 | 2005-07-28 | サンーゴバン アブレイシブズ，インコーポレイティド | Roll grinding method |
| WO2020161869A1 (en) * | 2019-02-07 | 2020-08-13 | 日本レヂボン株式会社 | Rotary grindstone |
-
1998
- 1998-03-26 JP JP7972698A patent/JPH11277446A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005522337A (en) * | 2002-04-11 | 2005-07-28 | サンーゴバン アブレイシブズ，インコーポレイティド | Roll grinding method |
| WO2020161869A1 (en) * | 2019-02-07 | 2020-08-13 | 日本レヂボン株式会社 | Rotary grindstone |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20050607 |