JP2003306752A - Roll for continuous hot dip metal coating - Google Patents
Roll for continuous hot dip metal coatingInfo
- Publication number
- JP2003306752A JP2003306752A JP2002116410A JP2002116410A JP2003306752A JP 2003306752 A JP2003306752 A JP 2003306752A JP 2002116410 A JP2002116410 A JP 2002116410A JP 2002116410 A JP2002116410 A JP 2002116410A JP 2003306752 A JP2003306752 A JP 2003306752A
- Authority
- JP
- Japan
- Prior art keywords
- roll
- shaft
- drive
- roll body
- shaft portion
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C13/00—Rolls, drums, discs, or the like; Bearings or mountings therefor
Landscapes
- Rolls And Other Rotary Bodies (AREA)
- Coating With Molten Metal (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、鋼板に亜鉛めっき
等の金属めっきを施す際に溶融金属浴中に浸漬して用い
られるシンクロールやサポートロール等の連続溶融金属
めっき用ロールに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll for continuous molten metal plating such as a sink roll or a support roll which is used by immersing it in a molten metal bath when metal plating such as galvanizing is applied to a steel sheet.
【０００２】[0002]
【従来の技術】連続溶融金属めっき装置は、表面を清
浄、活性化した鋼板を亜鉛等の溶融金属浴中に浸漬、走
行させながら連続的にめっきを行うものである。その
際、シンクロールやサポートロール等の連続溶融金属め
っき用ロールが溶融金属浴中に浸漬されて用いられる。
シンクロールは、溶融金属浴中の底部に配置され、浴中
に送られてきた鋼板の進行方向を上方の浴面側に変える
ものである。通常、シンクロールの回転動力は、鋼板の
走行移動によって駆動トルクが付与される。また、サポ
ートロールは、一対のロールからなりシンクロールを通
過した後の浴面に近い位置に設けられ、外部のモーター
によりスピンドルを介して駆動され、鋼板を挟み込み、
鋼板のパスラインを保ち、シンクロールを通過した際に
生じる鋼板の反りを矯正する。2. Description of the Related Art A continuous hot-dip galvanizing apparatus is one in which a steel plate whose surface has been cleaned and activated is immersed in a bath of hot-dip metal such as zinc and is continuously run while running. At that time, rolls for continuous molten metal plating such as sink rolls and support rolls are used by being immersed in the molten metal bath.
The sink roll is arranged at the bottom of the molten metal bath and changes the traveling direction of the steel sheet sent into the bath to the upper bath surface side. Usually, the rotational power of the sink roll is given a drive torque by the traveling movement of the steel plate. The support roll is composed of a pair of rolls and is provided at a position close to the bath surface after passing through the sink roll, and is driven by an external motor via a spindle to sandwich the steel plate,
Keeps the steel sheet pass line and corrects the warp of the steel sheet that occurs when passing through the sink roll.
【０００３】従来の連続溶融金属めっき用ロールには、
耐食性に優れるステンレス鋼やクロム系耐熱鋼等の鉄鋼
材料が用いられていた。しかしながら、このロールは長
時間、溶融金属浴中に浸漬されると、表面が侵食されて
摩耗しやすかった。さらに耐食性、耐摩耗性を向上させ
るために鉄鋼材料からなるロール母材表面に、耐食性Ｃ
ｏ基合金を肉盛溶接したり、ＷＣ−Ｃｏ系超硬合金やＡ
ｌ2Ｏ3等のセラミックスを溶射したものがあるが、母材
と溶射被膜との熱膨張率の差により薄い被膜にクラック
を生じそこから侵食されて摩耗を避けられなかった。Conventional rolls for continuous hot metal plating include
Steel materials such as stainless steel and chrome heat resistant steel, which have excellent corrosion resistance, have been used. However, when this roll was immersed in a molten metal bath for a long time, its surface was easily corroded and easily worn. Furthermore, in order to improve the corrosion resistance and wear resistance, corrosion resistance C
Overlay welding of o-based alloys, WC-Co cemented carbide and A
Some ceramics such as l 2 O 3 are sprayed, but due to the difference in the coefficient of thermal expansion between the base material and the sprayed coating, cracks are generated in the thin coating and corrosion is unavoidable from this, and wear cannot be avoided.
【０００４】摩耗が著しくなると、ロールの真円度、円
筒度を維持できなくなり、ロールや鋼板に振動が起こ
り、均一なめっき特性の鋼板が得られなくなる。このた
め、従来は１〜２週間の連続使用の後に、一旦めっき作
業を中止して摩耗したロールを交換する必要があった。
これは生産性を著しく低下させ、ロール交換費用がかさ
むことにより製品のコスト高を招く問題があった。If the wear becomes remarkable, the roundness and cylindricity of the roll cannot be maintained, the roll and the steel plate vibrate, and a steel plate having uniform plating characteristics cannot be obtained. Therefore, conventionally, it was necessary to temporarily stop the plating operation and replace the worn roll after continuous use for 1 to 2 weeks.
This significantly lowers the productivity and increases the cost of roll replacement, resulting in a high product cost.
【０００５】そこで、これを解決するために、鋼板が接
触するロール胴部（通板部）を耐食性、耐熱性、耐摩耗
性に優れるセラミックスにより構成した連続溶融金属め
っき用ロールが知られている。例えば、従来例として特
開平５−２７１８８７号には、ＳＵＨ３０９の耐熱鋼か
らなる軸にサイアロン製のセラミックススリーブを保持
する黄銅製の止めリングを挿入してから、軸の両端から
耐熱鋼製の押さえリングをはめて、軸とセラミックスス
リーブを固定したサポートロールが記載されている。In order to solve this, a roll for continuous hot dip metal plating is known in which the roll body portion (passing plate portion) with which the steel sheet comes into contact is made of ceramics having excellent corrosion resistance, heat resistance and wear resistance. . For example, in JP-A-5-271887 as a conventional example, a brass stop ring holding a ceramic sleeve made of sialon is inserted into a shaft made of heat-resistant steel of SUH309, and then a heat-resistant steel holder is pressed from both ends of the shaft. A support roll in which a shaft is fitted and a shaft and a ceramic sleeve are fixed is described.
【０００６】[0006]
【発明が解決しようとする課題】シンクロールやサポー
トロール等の連続溶融金属めっき用ロールは、鋼板と接
触した状態となるので鋼板と同一速度で回転する必要が
ある。このため、連続溶融金属めっき用ロールはできる
かぎり回転しやすく、起動および鋼板の走行速度の変化
に追従しやすいことが望まれる。しかしながら、前記従
来例の場合、耐熱鋼からなる中実の軸を有するのでロー
ル自重が重くなり、走行する鋼板に追従して回転し難い
問題があった。A roll for continuous hot-dip metal plating such as a sink roll or a support roll is in contact with a steel plate and therefore needs to rotate at the same speed as the steel plate. Therefore, it is desired that the continuous hot-dip galvanizing roll rotate as easily as possible and easily follow start-up and changes in running speed of the steel sheet. However, in the case of the conventional example, since the roll has a solid shaft made of heat-resistant steel, the weight of the roll becomes heavy, and there is a problem that it is difficult to rotate following the running steel plate.
【０００７】また、ロール軸とセラミックススリーブと
の隙間に溶融金属が侵入した状態で、ロールを浴中から
引き揚げると、溶融金属が隙間に封入されたまま溜まっ
て、温度の降下とともに凝固する。一方、浴中使用時に
熱膨張していたロールは温度の降下により冷却され収縮
し始める。そのため、隙間に溜まって凝固した金属によ
りセラミックススリーブが圧縮作用を受けて割れを生じ
る問題があった。When the roll is pulled up from the bath in a state where the molten metal has entered the gap between the roll shaft and the ceramic sleeve, the molten metal remains in the gap and remains solidified as the temperature drops. On the other hand, the roll that has been thermally expanded during use in the bath is cooled by the decrease in temperature and begins to contract. Therefore, there is a problem that the ceramic sleeve is compressed by the metal accumulated and solidified in the gap to cause cracking.
【０００８】また、前記従来例はロール胴部のみがセラ
ミックスで構成され、ロールの軸と押さえリングは耐熱
鋼、止めリングは黄銅を採用しているので溶融金属浴に
対する耐食性、耐摩耗性は未だ十分でなかった。そこ
で、ロール全体をセラミックスで構成できればよいが、
焼結製のセラミックスは、例えばセラミックスの原料粉
末等を型の中に入れ、冷間静水圧プレス装置により成形
した後、焼成して製造されるため、大きさや形状に限界
がある。特に、ロールのような長尺品の場合、ロール全
体をセラミックスにより一体的に製造するには、長さ寸
法の制約を多く受けざる得なかった。Further, in the above-mentioned conventional example, only the roll body is made of ceramics, the roll shaft and the pressing ring are made of heat-resistant steel, and the stop ring is made of brass. Therefore, the corrosion resistance and wear resistance to the molten metal bath are not yet achieved. It wasn't enough. Therefore, if the entire roll can be made of ceramics,
Sintered ceramics are limited in size and shape because, for example, raw material powder of ceramics is put in a mold, molded by a cold isostatic pressing device, and then fired. In particular, in the case of a long product such as a roll, in order to integrally manufacture the entire roll with ceramics, there are many restrictions on the length dimension.
【０００９】この課題に対して、本発明者は、耐食性、
耐熱性、耐摩耗性に優れるセラミックスにより、中空状
のロール胴部とロール軸部を別個に作製した後、ロール
胴部の片端部に一つのロール軸部を、ロール胴部の他端
部に別のロール軸部をそれぞれ隙間を有するように嵌合
させて組立てることにより構成した連続溶融金属めっき
用ロールを提案した。To solve this problem, the present inventor
After making a hollow roll body and roll shaft separately from ceramics with excellent heat resistance and wear resistance, one roll shaft at one end of the roll body and the other end of the roll body We proposed a roll for continuous hot-dip galvanizing, which was constructed by assembling different roll shaft parts so as to have a gap therebetween and assembling them.
【００１０】前記連続溶融金属めっき用ロールは優れた
性能を有するがまだ改善を要するものである。すなわ
ち、ロールの駆動軸はロールを駆動させるスピンドルシ
ャフトにより回転させられ、一方ロール胴部も鋼板のテ
ンションの反力を受け鋼板の進行方向に回転させられ
る。しかしながら、ロールを駆動させるスピンドルシャ
フトおよびロール側の駆動クラッチ部は自在継手の形式
をとるため、スピンドルシャフトが常に一様な回転をし
てもロール駆動軸は一様な回転をせず、速度変動を生
じ、使用中ロールの回転速度よりも鋼板の進行速度が速
い場合が生じた。このため、ロール駆動軸のクラッチ部
が衝撃荷重を受けやすく、破損した場合、ロール駆動軸
全体を再製作しなければならない課題がある。The continuous hot-dip galvanizing roll has excellent performance, but still needs improvement. That is, the drive shaft of the roll is rotated by the spindle shaft that drives the roll, while the roll body is also rotated in the traveling direction of the steel sheet by the reaction force of the tension of the steel sheet. However, since the spindle shaft that drives the roll and the drive clutch on the roll side are in the form of a universal joint, the roll drive shaft does not rotate uniformly even if the spindle shaft always rotates, and speed fluctuations occur. Occurs, and in some cases, the traveling speed of the steel sheet is higher than the rotation speed of the roll during use. Therefore, the clutch portion of the roll drive shaft is likely to receive an impact load, and if it is damaged, there is a problem that the entire roll drive shaft must be remanufactured.
【００１１】さらに、ロール自体をロール胴部と軸部と
を隙間を有するように嵌合させて組立てているため、ロ
ール単体でハンドリングする際に隙間のある嵌合部で外
れて落下しやすく、その衝撃で部品が破損するという課
題がある。Further, since the roll itself is assembled by fitting the roll body portion and the shaft portion so as to have a gap therebetween, when handling the roll alone, it is easy to fall off at the fitting portion having a gap, There is a problem that parts are damaged by the impact.
【００１２】そこで本発明は、このような問題を解消す
ることを目的としており、耐食性、耐熱性、耐摩耗性に
優れ、ロールを軽量化して回転しやすい、ロールを浴中
から引き揚げた際の割れを防止でき、ロール全体をセラ
ミックスにより長尺化できるとともに、使用中に駆動ク
ラッチが万一破損しても容易に交換でき、ロール単体で
ハンドリングする場合でも嵌合部が外れずハンドリング
が容易にできる連続式溶融金属めっき用ロールを提供す
ることを課題とする。Therefore, the present invention is intended to solve such a problem, and is excellent in corrosion resistance, heat resistance, and abrasion resistance, makes the roll lightweight and easy to rotate, and when the roll is pulled out from the bath. Cracks can be prevented, the entire roll can be made longer with ceramics, and even if the drive clutch is damaged during use, it can be easily replaced, and even when handling the roll alone, the fitting part does not come off and handling is easy. An object of the present invention is to provide a continuous hot-dip galvanizing roll.
【００１３】[0013]
【課題を解決するための手段】本発明の連続溶融金属め
っき用ロールは、ロール胴部、軸部、駆動クラッチ部を
それぞれセラミックスにより中空状に形成し、ロール胴
部の内面と軸部の外面との間に隙間を有するように、ロ
ール胴部の両端部に軸部を嵌合し、さらに駆動側の軸部
の外面と駆動クラッチ部の内面との間に隙間を有するよ
うに、駆動側の軸部に駆動クラッチ部を嵌合するととも
に、それぞれの嵌合部に抜け止め用部材を挿入し固定部
材で固定することにより組立てたことを特徴とする。A roll for continuous hot-dip galvanizing of the present invention has a roll body, a shaft, and a drive clutch which are formed of ceramics in a hollow shape, and the inner surface of the roll body and the outer surface of the shaft are formed. A shaft portion is fitted to both ends of the roll body so that there is a gap between the drive drum and the drive side so that there is a gap between the outer surface of the drive shaft and the inner surface of the drive clutch. The drive clutch portion is fitted to the shaft portion, and the retaining member is inserted into each fitting portion and fixed by the fixing member, thereby assembling.
【００１４】本発明において、軸部に設けた段付き部の
端面と、軸部の周囲に配置されたすべり軸受の端面との
間に形成したスラスト方向の隙間が、ロール胴部の端部
に嵌合した部分の軸部のスラスト方向長さより短いこと
を特徴とする。また、ロール胴部と軸部、及び駆動側の
軸部と駆動クラッチ部を平行クラッチ方式またはスプラ
イン方式により嵌合して組立てることが好ましい。さら
に、ロール胴部、軸部などを形成するセラミックスは、
窒化ケイ素やサイアロン等の窒化ケイ素系セラミックス
であるのが好ましい。In the present invention, a thrust-direction gap formed between the end surface of the stepped portion provided on the shaft portion and the end surface of the slide bearing arranged around the shaft portion is provided at the end portion of the roll body. It is characterized in that it is shorter than the thrust direction length of the shaft portion of the fitted portion. In addition, it is preferable that the roll barrel portion and the shaft portion, and the drive-side shaft portion and the drive clutch portion are fitted and assembled by a parallel clutch system or a spline system. Furthermore, the ceramics that form the roll body, shaft, etc.
It is preferably a silicon nitride ceramic such as silicon nitride or sialon.
【００１５】[0015]
【作用】本発明の連続溶融金属めっき用ロールは、ロー
ル胴部、軸部、駆動クラッチ部、抜け止め用部材がセラ
ミックスからなるので、溶融金属浴に対して十分な耐食
性、耐熱性、耐摩耗性を有する。セラミックスのなかで
も窒化ケイ素やサイアロン等の窒化ケイ素系セラミック
スは、熱膨張係数が約３×１０-6／℃と小さく耐熱衝撃
性に優れ、高温高強度を有するので好ましい。In the roll for continuous hot-dip galvanizing of the present invention, since the roll body, shaft, drive clutch, and retaining member are made of ceramics, they have sufficient corrosion resistance, heat resistance, and wear resistance against the molten metal bath. Have sex. Among the ceramics, silicon nitride ceramics such as silicon nitride and sialon are preferable because they have a small thermal expansion coefficient of about 3 × 10 −6 / ° C., excellent thermal shock resistance, and high temperature and high strength.
【００１６】ロール胴部と軸部及び駆動クラッチ部は、
それぞれ回転軸方向に貫通孔を有する中空体であるた
め、ロール全体の自重が軽くなる。したがって、ロール
の回転慣性力が小さくなり、運転起動および鋼板の走行
速度の変化に良好に追従して回転できる。The roll body, shaft and drive clutch are
Since each is a hollow body having a through hole in the rotation axis direction, the weight of the entire roll is reduced. Therefore, the rotational inertial force of the roll becomes small, and the roll can be rotated well following the start-up of the operation and the change of the traveling speed of the steel sheet.
【００１７】本発明では、溶融金属が侵入する隙間を生
じる可能性のある部分が、ロール胴部と軸部、及び駆動
側の軸部と駆動クラッチ部を組立てた部分のみと少な
く、また、ロールを浴中から引き揚げた際に、中空のロ
ール胴部と軸部により形成された貫通孔の両端の開口部
から溶融金属が円滑に排出されるので、隙間に溶融金属
が溜まって凝固することによるロールの割れを防ぐこと
ができる。According to the present invention, there are few portions in which a gap into which molten metal enters may be generated, only in the portion in which the roll barrel portion and the shaft portion and the drive side shaft portion and the drive clutch portion are assembled, and the roll is small. Since the molten metal is smoothly discharged from the openings at both ends of the through-hole formed by the hollow roll body and the shaft when the metal is lifted from the bath, Roll cracking can be prevented.
【００１８】また、ロール胴部と軸部と駆動クラッチ部
を別個に作製した後、ロール胴部の片端部（非駆動側）
に一つの軸部を、ロール胴部の他端部（駆動側）に駆動
側の軸部及び駆動クラッチ部を嵌合させて組立てるた
め、全体がセラミックスからなるロールを容易に長尺化
できる。After the roll body, the shaft and the drive clutch are manufactured separately, one end of the roll body (non-driving side)
Since one shaft portion is assembled by fitting the drive side shaft portion and the drive clutch portion to the other end portion (driving side) of the roll body portion, the length of the roll made entirely of ceramics can be easily increased.
【００１９】また、ロール胴部と軸部を機械的に剛接合
とすると、曲げや熱衝撃により両者の接合部に過大な応
力が生じ、ロールが破壊するおそれがある。このため、
ロール胴部の内面と軸部の外面との間に隙間を有するよ
うに両者を嵌合することにより柔構造として組立てる。
これにより、ロール胴部と軸部との間の拘束力を回避で
き、ロールに曲げまたは熱衝撃が付加された場合の応力
の発生を軽減することが可能となり、ロールの割れを防
止できる。If the roll body and the shaft are mechanically rigidly joined, bending or thermal shock may cause excessive stress at the joint between the two, and the roll may be broken. For this reason,
A flexible structure is assembled by fitting the two so that there is a gap between the inner surface of the roll body and the outer surface of the shaft.
As a result, it is possible to avoid the restraining force between the roll body and the shaft, reduce the occurrence of stress when the roll is bent or subjected to thermal shock, and prevent the roll from cracking.
【００２０】[0020]
【発明の実施の形態】以下、連続溶融金属めっき装置の
サポートロールにサイアロンセラミックスを適用した実
施例について説明する。図１は連続溶融金属めっき装置
の概略を示す。図１において、焼鈍炉から送出された鋼
板１は、酸化防止のスナウト２を通り、亜鉛の溶融金属
浴３の中に浸漬される。そして、鋼板１は溶融金属浴３
中の底部に懸架されたシンクロール４により進行方向を
変えられ浴面側に上昇する。次いで、浴面に近い位置に
浸漬、支持された一対のロールからなるサポートロール
５で鋼板１を挟み込み、鋼板１の反りや振動を防止す
る。続いて、溶融金属浴３面の上方にあるガスワイピン
グ６によって高速ガスを吹き付け、そのガス圧、吹き付
け角度により付着めっきの厚さを均一に調整する。この
ようにして、めっきが施された鋼板１は次の工程に送ら
れる。この連続溶融金属めっき装置に、本発明の特徴を
有するサポートロール５を装備した。BEST MODE FOR CARRYING OUT THE INVENTION An embodiment in which sialon ceramics is applied to a support roll of a continuous hot dip metal plating apparatus will be described below. FIG. 1 shows an outline of a continuous hot-dip metal plating apparatus. In FIG. 1, a steel sheet 1 delivered from an annealing furnace passes through an oxidation preventing snout 2 and is immersed in a molten metal bath 3 of zinc. And the steel plate 1 is the molten metal bath 3
The sink roll 4 suspended at the bottom of the inside changes the traveling direction and rises to the bath surface side. Next, the steel plate 1 is sandwiched by a support roll 5 composed of a pair of rolls immersed and supported near the bath surface to prevent the steel plate 1 from warping or vibrating. Subsequently, a high-speed gas is blown by the gas wiping 6 above the surface of the molten metal bath 3, and the thickness of the deposited plating is adjusted uniformly by the gas pressure and the blowing angle. In this way, the plated steel sheet 1 is sent to the next step. This continuous hot metal plating apparatus was equipped with a support roll 5 having the features of the present invention.
【００２１】図２は本発明のサポートロール５の断面図
を示す。図２において、サポートロール５は、ロール胴
部７の片端部（非駆動側）に軸部９を、ロール胴部７の
他端部（駆動側）に駆動側の軸部８をそれぞれ嵌合し、
さらに駆動側の軸部８の外面に駆動クラッチ部１６を嵌
合し、それぞれの嵌合部に形成した貫通孔に例えばボル
トやピンなどの抜け止め用部材１７ａ、１７ｂを挿入
し、ナットなどの固定部材１８ａ、１８ｂで固定するこ
とにより組立てる。このとき、ロール胴部７の内面と、
軸部８および軸部９の外面との間に隙間を確保する。さ
らに駆動側軸部８の外面と駆動クラッチ部１６の内面と
の間に隙間を確保する。サポートロール５は、溶融金属
浴に対して優れた耐食性、耐熱衝撃性、高温高強度特性
を有するサイアロンセラミックスにより形成した。FIG. 2 shows a sectional view of the support roll 5 of the present invention. In FIG. 2, the support roll 5 has a shaft portion 9 fitted to one end portion (non-driving side) of the roll body portion 7 and a driving side shaft portion 8 fitted to the other end portion (driving side) of the roll body portion 7. Then
Further, the drive clutch portion 16 is fitted to the outer surface of the drive side shaft portion 8, and the retaining members 17a and 17b such as bolts and pins are inserted into the through holes formed in the respective fitting portions, and nuts and the like are inserted. It is assembled by fixing with fixing members 18a and 18b. At this time, the inner surface of the roll body 7
A gap is secured between the outer surfaces of the shaft portion 8 and the shaft portion 9. Further, a gap is secured between the outer surface of the drive side shaft portion 8 and the inner surface of the drive clutch portion 16. The support roll 5 was formed of sialon ceramics having excellent corrosion resistance, thermal shock resistance, and high-temperature high-strength characteristics with respect to a molten metal bath.
【００２２】本実施例では、次のようにサポートロール
５のロール胴部７を作製した。まず、平均粒径０．８μ
ｍのα−Ｓｉ3Ｎ4粉末：８７重量％、平均粒径０．５μ
ｍのＡｌ2Ｏ3粉末：５重量％、平均粒径０．５μｍのＡ
ｌＮ固溶体粉末：３重量％、平均粒径１．０μｍのＹ2
Ｏ3粉末：５重量％を配合し、バインダーとしてポリビ
ニルブチラールを原料粉末１００重量部当たり０．５重
量％を加えて撹拌して得た混合物を、１０００ｋｇ／ｃ
ｍ2の圧力でＣＩＰ成形した。次に、常圧、窒素雰囲気
下、１７５０℃で５時間焼結してサイアロンセラミック
ス焼結体を得た。In this example, the roll body 7 of the support roll 5 was manufactured as follows. First, the average particle size is 0.8μ
α-Si 3 N 4 powder of m: 87% by weight, average particle size 0.5 μ
m Al 2 O 3 powder: 5% by weight, A having an average particle size of 0.5 μm
1N solid solution powder: 3% by weight, Y 2 having an average particle size of 1.0 μm
O 3 powder: 5 wt% was added, polyvinyl butyral as a binder was added at 0.5 wt% per 100 parts by weight of raw material powder, and the mixture was stirred to obtain 1000 kg / c.
CIP molding was performed at a pressure of m 2 . Next, it was sintered at 1750 ° C. for 5 hours under normal pressure and nitrogen atmosphere to obtain a sialon ceramic sintered body.
【００２３】得られたサイアロンセラミックス焼結体は
理論密度の９９．１％の密度を有し、常温におけるビッ
カース硬度Ｈｖが１５８０、常温における３点曲げによ
る曲げ強さが１００ｋｇｆ／ｍｍ2であった。この焼結
体を所定の形状に機械加工して中空円筒状のロール胴部
７を作製した。また、ロールの軸部８、９、駆動クラッ
チ部１６、抜け止め用部材１７ａ、１７ｂ、固定部材１
８ａ、１８ｂも、ロール胴部７と同様にサイアロンセラ
ミックス焼結体で作製した。The obtained sialon ceramics sintered body had a density of 99.1% of the theoretical density, a Vickers hardness Hv at room temperature of 1580, and a bending strength by three-point bending at room temperature of 100 kgf / mm 2 . . The sintered body was machined into a predetermined shape to produce a hollow cylindrical roll body 7. Further, the roll shaft portions 8 and 9, the drive clutch portion 16, the retaining members 17a and 17b, and the fixing member 1.
8a and 18b were also made of sialon ceramics sintered body, like the roll body 7.
【００２４】ロール胴部７は、外径２１０ｍｍ、内径１
６５ｍｍ、長さ１４００ｍｍの中空円筒体からなる。ロ
ール胴部７の外周面は鋼板１が接触して通板される面で
ある。ロール胴部７の両端部の内周に、おのおの端面か
ら奥行き約６０ｍｍの範囲に嵌合部を設けた。また、こ
の嵌合部に抜け止め用部材１７ｂを挿入するための貫通
孔を形成した。The roll body 7 has an outer diameter of 210 mm and an inner diameter of 1
It consists of a hollow cylinder with a length of 65 mm and a length of 1400 mm. The outer peripheral surface of the roll body portion 7 is a surface through which the steel plate 1 comes into contact and is passed. Fitting portions were provided on the inner circumferences of both ends of the roll body 7 in a range of a depth of about 60 mm from each end surface. Further, a through hole for inserting the retaining member 17b is formed in the fitting portion.
【００２５】一方の軸部８は中空体からなり、溶融金属
浴の外部に設けられた駆動モーター（図示せず）により
スピンドル（図示せず）を介して回転される駆動側の軸
部である。軸となる細径側（図２では軸部８の右側）
は、最大外径１４０ｍｍ、内径８０ｍｍである。ロール
胴部７と接合される太径側（図２では軸部８の左側）
は、外径１７５ｍｍ、内径１３０ｍｍである。細径側と
太径側の長さを合わせた軸部８の全長は４７０ｍｍであ
る。太径側の軸部８の端部外周に、ロール胴部７と組立
てるための嵌合部を設けた。この嵌合部に抜け止め用部
材１７ｂを挿入するための貫通孔を形成した。また、細
径側の軸部８の端部外周に、スピンドルと結合させるた
めの駆動クラッチ部１６を嵌合させるための嵌合部を設
けた。この嵌合部に抜け止め用部材１７ａを挿入するた
めの貫通孔を形成した。また、軸部８の周囲に配置され
るすべり軸受１３と対向するように、軸部８に段付き部
１１を設けた。One shaft portion 8 is a hollow shaft body, and is a drive-side shaft portion rotated by a drive motor (not shown) provided outside the molten metal bath via a spindle (not shown). . Small diameter side that becomes the shaft (right side of shaft 8 in Fig. 2)
Has a maximum outer diameter of 140 mm and an inner diameter of 80 mm. The large diameter side joined to the roll body 7 (left side of the shaft 8 in FIG. 2)
Has an outer diameter of 175 mm and an inner diameter of 130 mm. The total length of the shaft portion 8 including the lengths of the small diameter side and the large diameter side is 470 mm. A fitting portion for assembling with the roll body portion 7 is provided on the outer circumference of the end portion of the shaft portion 8 on the large diameter side. A through hole for inserting the retaining member 17b was formed in this fitting portion. Further, a fitting portion for fitting the drive clutch portion 16 for coupling with the spindle is provided on the outer periphery of the end portion of the shaft portion 8 on the small diameter side. A through hole for inserting the retaining member 17a was formed in this fitting portion. Further, the shaft portion 8 is provided with the stepped portion 11 so as to face the slide bearing 13 arranged around the shaft portion 8.
【００２６】他方の軸部９は中空体からなり、すべり軸
受１４で支持される従動側の軸部である。軸となる細径
側（図２では軸部９の左側）は、外径１２０ｍｍ、内径
８０ｍｍである。ロール胴部７と接合される太径側（図
２では軸部９の右側）は、外径１７５ｍｍ、内径１３０
ｍｍである。細径側と太径側の長さを合わせた軸部９の
全長は４２０ｍｍである。太径側の軸部９の端部外周
に、ロール胴部７と組立てるための嵌合部を設けた。こ
の嵌合部に抜け止め用部材１７ｂを挿入するための貫通
孔を形成した。また、軸部９の周囲に配置されるすべり
軸受１４と対向するように、軸部９に段付き部１２を設
けた。The other shaft portion 9 is a hollow shaft body and is a driven shaft portion supported by the slide bearing 14. The small diameter side (left side of the shaft portion 9 in FIG. 2) serving as a shaft has an outer diameter of 120 mm and an inner diameter of 80 mm. The large diameter side (right side of the shaft portion 9 in FIG. 2) joined to the roll body 7 has an outer diameter of 175 mm and an inner diameter of 130.
mm. The total length of the shaft portion 9 including the lengths of the small diameter side and the large diameter side is 420 mm. A fitting portion for assembling with the roll body portion 7 is provided on the outer periphery of the end portion of the shaft portion 9 on the large diameter side. A through hole for inserting the retaining member 17b was formed in this fitting portion. Further, a stepped portion 12 is provided on the shaft portion 9 so as to face the slide bearing 14 arranged around the shaft portion 9.
【００２７】このようなロール胴部７、軸部８、軸部
９、駆動クラッチ部１６を用意した後、ロール胴部７の
両端部に軸部８、軸部９を、ロール胴部７の回転軸と同
軸に、しかもロール胴部７の内面と、軸部８および軸部
９の外面との間に隙間を有するように嵌合させた。ま
た、駆動側の軸部８の外面と駆動クラッチ部１６の内面
との間に隙間を有するように、駆動側の軸部８に駆動ク
ラッチ部１６を嵌合させた。ついで、ロール胴部７と軸
部８との嵌合部、およびロール胴部７と軸部９との嵌合
部に形成した貫通孔にボルト（抜け止め用部材）１７ｂ
を挿入し、ナット（固定部材）１８ｂにより締結固定し
た。同様に、駆動側の軸部８と駆動クラッチ部１６との
嵌合部に形成した貫通孔にボルト（抜け止め用部材）１
７ａを挿入し、ナット（固定部材）１８ａにより締結固
定した。このようにして本発明のサポートロール５を組
立てた。After the roll body 7, the shaft 8, the shaft 9 and the drive clutch 16 are prepared, the shaft 8 and the shaft 9 are attached to both ends of the roll body 7. It was fitted so as to be coaxial with the rotating shaft and to have a gap between the inner surface of the roll barrel portion 7 and the outer surfaces of the shaft portions 8 and 9. Further, the drive clutch portion 16 was fitted to the drive side shaft portion 8 so that there was a gap between the outer surface of the drive side shaft portion 8 and the inner surface of the drive clutch portion 16. Then, a bolt (a retaining member) 17b is formed in the through hole formed in the fitting portion of the roll body portion 7 and the shaft portion 8 and the fitting portion of the roll body portion 7 and the shaft portion 9.
Was inserted and fastened and fixed by a nut (fixing member) 18b. Similarly, a bolt (a retaining member) 1 is provided in a through hole formed in a fitting portion between the drive-side shaft portion 8 and the drive clutch portion 16.
7a was inserted and fastened and fixed by a nut (fixing member) 18a. In this way, the support roll 5 of the present invention was assembled.
【００２８】このように組立てたサポートロール５に
は、回転軸方向に、駆動クラッチ部１６、軸部８、ロー
ル胴部７、軸部９を貫いた貫通孔が形成されることにな
る。サポートロール５を溶融金属浴中に浸漬したとき、
この貫通孔内に溶融金属が侵入し満たされる。一方、サ
ポートロール５を溶融金属浴中から引き揚げた際には、
貫通孔両端の開口部から溶融金属が円滑に排出される。In the support roll 5 assembled in this way, a through hole penetrating the drive clutch portion 16, the shaft portion 8, the roll body portion 7 and the shaft portion 9 is formed in the rotation axis direction. When the support roll 5 is immersed in the molten metal bath,
Molten metal penetrates and fills the through holes. On the other hand, when the support roll 5 is lifted from the molten metal bath,
Molten metal is smoothly discharged from the openings at both ends of the through hole.
【００２９】本発明のサポートロール５において、ロー
ル胴部７の端部に嵌合された部分の軸部８のスラスト方
向長さＬ１が、ロール胴部７の端部から突出した軸部８
のスラスト方向長さＬ２より短いすなわちＬ１＜Ｌ２で
あるほうが、軸部８の全長が短い分軽量化を一層図るこ
とができるので望ましい。これは軸部９についても同じ
である。In the support roll 5 of the present invention, the axial length L1 of the shaft portion 8 of the portion fitted to the end portion of the roll body portion 7 protrudes from the end portion of the roll body portion 7.
It is preferable that the length L2 is shorter than the thrust-direction length L2, that is, L1 <L2, because the overall length of the shaft portion 8 is short and the weight can be further reduced. This also applies to the shaft portion 9.
【００３０】本発明のサポートロール５は、すべり軸受
１３、１４によりラジアル方向、スラスト方向の力を受
けている。そこで、スラスト方向の拘束については、抜
け止め用部材１７ｂ、固定部材１８ｂにより軸方向に外
れることなく拘束されている。また、使用中に駆動クラ
ッチ部１６が万一破損しても駆動クラッチ部１６のみを
容易に交換でき、ロール単体でハンドリングする場合で
も嵌合部が外れずハンドリングが容易にできる。The support roll 5 of the present invention receives the forces in the radial direction and the thrust direction by the slide bearings 13 and 14. Therefore, with respect to the restraint in the thrust direction, it is restrained by the retaining member 17b and the fixing member 18b without being disengaged in the axial direction. Further, even if the drive clutch portion 16 is damaged during use, only the drive clutch portion 16 can be easily replaced, and even when the roll alone is handled, the fitting portion does not come off and the handling is easy.
【００３１】図３は図２中のＡ−Ａ方向から見た断面図
である。図３に示すように、ロール胴部７と駆動側軸部
８との嵌合部を平行クラッチ１５の構造とすることによ
り駆動力を伝達するようにした。また、ロール胴部７と
軸部９も同様に平行クラッチ方式で嵌合した。なお、駆
動力の伝達方法は平行クラッチ方式の他にスプライン方
式を用いても良い。FIG. 3 is a sectional view as seen from the direction AA in FIG. As shown in FIG. 3, the driving force is transmitted by making the fitting portion between the roll body portion 7 and the driving side shaft portion 8 the structure of the parallel clutch 15. Further, the roll body portion 7 and the shaft portion 9 are also fitted by the parallel clutch method in the same manner. The driving force transmission method may be a spline method instead of the parallel clutch method.
【００３２】このように構成した本発明のサポートロー
ル５を図１に示す連続溶融金属めっき装置において、板
厚が２ｍｍ、板幅が１３００ｍｍのＳＵＳ３００系ステ
ンレス鋼板を亜鉛めっき処理したところ、約１ヶ月の連
続使用後、サポートロール５は侵食、摩耗が殆ど見られ
なく耐用寿命が著しく向上したことを確認できた。ま
た、ロール自重が軽いので回転しやすく、起動および鋼
板の走行速度の変化に良好に追従し、さらに摩耗による
ロールや鋼板の振動の発生を抑えられるので高品質なめ
っき特性の鋼板が得られた。The support roll 5 of the present invention thus constructed was galvanized on a SUS300 series stainless steel plate having a plate thickness of 2 mm and a plate width of 1300 mm in a continuous molten metal plating apparatus shown in FIG. It was confirmed that after continuous use, the support roll 5 was hardly corroded and worn, and the service life was remarkably improved. In addition, since the roll weight is light, it easily rotates, follows the changes in the starting speed and the running speed of the steel plate well, and can suppress the vibration of the roll and the steel plate due to wear, so that a steel plate with high quality plating characteristics was obtained. .
【００３３】以上、サポートロールの実施例について述
べたが、本発明はシンクロールなど各種の連続溶融金属
めっき用ロールに適用できることは言うまでもない。Although the embodiment of the support roll has been described above, it goes without saying that the present invention can be applied to various rolls for continuous molten metal plating such as a sink roll.
【００３４】[0034]
【発明の効果】本発明の連続溶融金属めっき用ロール
は、耐食性、耐熱性、耐摩耗性等に優れ耐用寿命が永く
なる。ロール自重が軽量なので鋼板の走行速度の変化に
良好に追従して回転する。また、ロールを浴中に入れて
回転させた際、またはロールを浴中から引き揚げた際の
ロールの割れを防止できる。したがって、高品質なめっ
き特性の鋼板を安定して生産できる。また、使用中に駆
動クラッチが万一破損しても容易に交換でき、ロール単
体でハンドリングする場合でも嵌合部が外れずハンドリ
ングが容易にできる。The roll for continuous hot metal plating of the present invention is excellent in corrosion resistance, heat resistance, wear resistance and the like and has a long useful life. Since the roll's own weight is light, it rotates well following changes in the running speed of the steel sheet. Further, it is possible to prevent the roll from cracking when the roll is put in a bath and rotated, or when the roll is lifted up from the bath. Therefore, it is possible to stably produce a steel sheet having high quality plating characteristics. Further, even if the drive clutch is damaged during use, it can be easily replaced, and even when the roll is handled as a single unit, the fitting portion does not come off and the handling is easy.
【図１】連続溶融金属めっき装置の概略を示す図であ
る。FIG. 1 is a diagram showing an outline of a continuous hot-dip metal plating apparatus.
【図２】本発明のサポートロールの断面図を示す図であ
る。FIG. 2 is a view showing a sectional view of a support roll of the present invention.
【図３】図２中のＡ−Ａ方向から見た断面図である。3 is a cross-sectional view as seen from the direction AA in FIG.
１ 鋼板、 ２ スナウト、 ３ 溶融金属浴、 ４
シンクロール、５ サポートロール、 ６ ガスワイピ
ング、 ７ ロール胴部、８ 軸部、 ９ 軸部、 １
１ 段付き部、 １２ 段付き部、１３ すべり軸受、
１４ すべり軸受、１５ 平行クラッチ１６ 駆動ク
ラッチ部、１７ａ 抜け止め用部材、 １８ａ 固定部
材、１７ｂ 抜け止め用部材、 １８ｂ 固定部材、Ｌ
１ ロール胴部に接合した部分の軸部のスラスト方向長
さ、Ｌ２ ロール胴部の端部から突出した部分の軸部の
スラスト方向長さ、Ｌ３ 軸部の段付き部とすべり軸受
間のスラスト方向の隙間、Ｌ４ 軸部の段付き部とすべ
り軸受間のスラスト方向の隙間1 steel plate, 2 snout, 3 molten metal bath, 4
Sink roll, 5 support rolls, 6 gas wiping, 7 roll body, 8 shafts, 9 shafts, 1
1 stepped part, 12 stepped part, 13 plain bearing,
14 slide bearing, 15 parallel clutch 16, drive clutch part, 17a retaining member, 18a fixing member, 17b retaining member, 18b fixing member, L
1 Length in the thrust direction of the shaft part that is joined to the roll body, L2 Length in the thrust direction of the shaft part that protrudes from the end of the roll body, L3 Thrust between the stepped part and the sliding bearing of the shaft part Direction gap, thrust direction gap between L4 shaft step and slide bearing
Claims (4)
れぞれセラミックスにより中空状に形成し、ロール胴部
の内面と軸部の外面との間に隙間を有するように、ロー
ル胴部の両端部に軸部を嵌合し、さらに駆動側の軸部の
外面と駆動クラッチ部の内面との間に隙間を有するよう
に、駆動側の軸部に駆動クラッチ部を嵌合するととも
に、それぞれの嵌合部に抜け止め用部材を挿入し固定部
材で固定することにより組立てたことを特徴とする連続
溶融金属めっき用ロール。1. A roll body, a shaft, and a drive clutch are each formed of ceramics in a hollow shape, and both ends of the roll body are formed such that a gap is provided between an inner surface of the roll body and an outer surface of the shaft. The shaft part on the drive side shaft part and the drive clutch part on the drive side shaft part so that there is a gap between the outer surface of the drive side shaft part and the inner surface of the drive clutch part. A roll for continuous hot metal plating, which is assembled by inserting a retaining member into a fitting portion and fixing it with a fixing member.
周囲に配置されたすべり軸受の端面との間に形成したス
ラスト方向の隙間が、ロール胴部の端部に嵌合した部分
の軸部のスラスト方向長さより短いことを特徴とする請
求項１に記載の連続溶融金属めっき用ロール。2. A gap in the thrust direction formed between the end surface of the stepped portion provided on the shaft portion and the end surface of the slide bearing arranged around the shaft portion is fitted to the end portion of the roll body portion. The roll for continuous hot-dip metal plating according to claim 1, wherein a length of a shaft portion of the formed portion in the thrust direction is shorter than that of the shaft portion.
動クラッチ部を平行クラッチ方式またはスプライン方式
により嵌合して組立てたことを特徴とする請求項１また
は２に記載の連続溶融金属めっき用ロール。3. The continuous melting according to claim 1, wherein the roll body portion and the shaft portion, and the driving side shaft portion and the driving clutch portion are fitted and assembled by a parallel clutch system or a spline system. Roll for metal plating.
ックスであることを特徴とする請求項１に記載の連続溶
融金属めっき用ロール。4. The roll for continuous hot metal plating according to claim 1, wherein the ceramic is a silicon nitride ceramic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002116410A JP3765484B2 (en) | 2002-04-18 | 2002-04-18 | Roll for continuous molten metal plating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002116410A JP3765484B2 (en) | 2002-04-18 | 2002-04-18 | Roll for continuous molten metal plating |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003306752A true JP2003306752A (en) | 2003-10-31 |
| JP3765484B2 JP3765484B2 (en) | 2006-04-12 |
Family
ID=29397154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002116410A Expired - Fee Related JP3765484B2 (en) | 2002-04-18 | 2002-04-18 | Roll for continuous molten metal plating |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3765484B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2447388A1 (en) | 2003-12-11 | 2012-05-02 | Hitachi Metals, Ltd. | Roll for use in galvanizing pot |
| JP2016099422A (en) * | 2014-11-19 | 2016-05-30 | 株式会社荒井製作所 | roller |
| JP2017067184A (en) * | 2015-09-30 | 2017-04-06 | 日立金属株式会社 | Bearing device |
| JP2017067185A (en) * | 2015-09-30 | 2017-04-06 | 日立金属株式会社 | Bearing device |
-
2002
- 2002-04-18 JP JP2002116410A patent/JP3765484B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2447388A1 (en) | 2003-12-11 | 2012-05-02 | Hitachi Metals, Ltd. | Roll for use in galvanizing pot |
| US8210999B2 (en) | 2003-12-11 | 2012-07-03 | Hitachi Metals Ltd. | Roll for use in galvanizing pot |
| JP2016099422A (en) * | 2014-11-19 | 2016-05-30 | 株式会社荒井製作所 | roller |
| JP2017067184A (en) * | 2015-09-30 | 2017-04-06 | 日立金属株式会社 | Bearing device |
| JP2017067185A (en) * | 2015-09-30 | 2017-04-06 | 日立金属株式会社 | Bearing device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3765484B2 (en) | 2006-04-12 |
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