JP2003306753A - Roll for continuous hot dip metal coating - Google Patents
Roll for continuous hot dip metal coatingInfo
- Publication number
- JP2003306753A JP2003306753A JP2002116411A JP2002116411A JP2003306753A JP 2003306753 A JP2003306753 A JP 2003306753A JP 2002116411 A JP2002116411 A JP 2002116411A JP 2002116411 A JP2002116411 A JP 2002116411A JP 2003306753 A JP2003306753 A JP 2003306753A
- Authority
- JP
- Japan
- Prior art keywords
- roll
- shaft
- roll body
- shaft portion
- continuous hot
- 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】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、ロールを浴中に入れ
て回転させた際、または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
る連続溶融金属めっき用ロールを提供することを課題と
する。An object of the present invention is to solve such problems, and it is excellent in corrosion resistance, heat resistance and wear resistance.
A roll for continuous hot-dip metal plating that makes the roll lighter and easier to rotate, prevents cracking when the roll is put in a bath and rotated, or when the roll is lifted from the bath, and the entire roll can be lengthened with ceramics. The challenge is to provide.
【００１０】[0010]
【課題を解決するための手段】この課題を解決する手段
について種々検討した結果、連続溶融金属めっき用ロー
ルにおいて、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軸部を別個に作製
した後、ロール胴部の片端部に一つの軸部を、ロール胴
部の他端部に別の軸部を組立てることが有効であること
を見い出し、本発明に至った。[Means for Solving the Problems] As a result of various studies on means for solving this problem, in a roll for continuous hot-dip metal plating, a ceramic body having excellent corrosion resistance, heat resistance, and wear resistance is used to form a hollow roll body and shaft. It was found that it is effective to assemble one shaft portion at one end of the roll barrel portion and another shaft portion at the other end portion of the roll barrel portion after manufacturing the portions separately, and arrived at the present invention.
【００１１】すなわち、本発明の連続溶融金属めっき用
ロールは、ロール胴部と軸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
を嵌合して組立てたことを特徴とする。That is, in the roll for continuous hot metal plating of the present invention, the roll body and the shaft are formed of ceramics in a hollow shape so that there is a gap between the inner surface of the roll body and the outer surface of the shaft. In addition, the shaft body is fitted to both ends of the roll body and assembled.
【００１２】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、軸部を形成するセラ
ミックスが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 is 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 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. Further, it is preferable that the roll body and the shaft are fitted and assembled by a parallel clutch system or a spline system. Further, it is preferable that the ceramic forming the roll body and the shaft is a silicon nitride ceramic such as silicon nitride or sialon.
【００１３】[0013]
【作用】本発明の連続溶融金属めっき用ロールは、ロー
ル胴部と軸部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。The roll for continuous hot metal plating of the present invention has sufficient corrosion resistance, heat resistance and wear resistance to the molten metal bath since the roll body and the shaft are made of ceramics. Among ceramics, silicon nitride ceramics such as silicon nitride and sialon have a thermal expansion coefficient of about 3 × 10 −6 /
It is preferable because it has a small temperature of ℃ and has excellent thermal shock resistance and high temperature and high strength.
【００１４】ロール胴部と軸部は、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。Since the roll body and the shaft are hollow bodies each having a through hole in the rotational 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.
【００１５】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。In the present invention, there is little possibility that a gap into which molten metal penetrates may be generated only in the portion where the roll body and the shaft are assembled, and when the roll is lifted from the bath, it is hollow. Since the molten metal is smoothly discharged from the openings at both ends of the through hole formed by the roll body and the shaft,
It is possible to prevent the roll from cracking due to the molten metal accumulating in the gap and solidifying.
【００１６】また、ロール胴部と軸部を別個に作製した
後、ロール胴部の片端部に一つの軸部を、ロール胴部の
他端部に別の軸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。Also, after the roll barrel and the shaft are separately manufactured, one shaft is fitted to one end of the roll barrel and another shaft is fitted to the other end of the roll barrel for assembly. A roll made entirely of ceramics can easily be made long.
【００１７】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, excessive stress may be generated in the joint between the two due to bending or thermal shock, 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.
【００１８】[0018]
【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.
【００１９】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の両端部に、軸部８、軸部９をそれぞれ嵌合して組
立てることにより構成される。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。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 is configured by fitting the shaft portion 8 and the shaft portion 9 to both ends of the roll body portion 7 and assembling them. At this time, the roll body 7
A gap is secured between the inner surface of the shaft and the outer surfaces of the shaft portion 8 and the shaft portion 9. 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.
【００２０】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.
【００２１】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および軸部９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 shaft portion 8 and the shaft portion 9 of the roll are also
Like the roll body 7, it was made of a sialon ceramic sintered body.
【００２２】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。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.
【００２３】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。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。なお、細径側の軸部８の端部には、
スピンドルと結合させるためのクラッチ部材（図示せ
ず）を取り付けた。この場合、クラッチ部材もサイアロ
ンセラミックス焼結体により作製した。One of the shafts 8 is a hollow shaft and is a drive-side shaft which is 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. 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. In addition, at the end of the shaft portion 8 on the small diameter side,
A clutch member (not shown) for connecting with the spindle was attached. In this case, the clutch member was also made of a sialon ceramic sintered body.
【００２４】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。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. 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.
【００２５】このようなロール胴部７、軸部８、軸部９
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ることにより、本発明のサポート
ロール５を組立てた。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、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。The roll body 7, the shaft 8 and the shaft 9
After preparing the roll body 7, the shaft portion 8 and the shaft portion 9 are provided on both ends of the roll body portion 7.
Is fitted coaxially with the rotation axis of the roll body 7 and with a gap between the inner surface of the roll body 7 and the outer surfaces of the shaft portion 8 and the shaft portion 9, thereby supporting the present invention. Roll 5 was assembled. In the support roll 5 assembled in this way, a through hole that penetrates 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, the molten metal penetrates and fills the through holes. On the other hand, support roll 5
When is drawn up from the molten metal bath, the molten metal is smoothly discharged from the openings at both ends of the through hole.
【００２６】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 thrust direction length L1 of the shaft portion 8 of the portion fitted to the end portion of the roll body portion 7 projects 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.
【００２７】ロール胴部と軸部が隙間を有する嵌合にす
ることにより、サポートロール５の駆動力伝達とスラス
ト方向の拘束に対する対処が必要となる。It is necessary to deal with the driving force transmission of the support roll 5 and the restraint in the thrust direction by fitting the roll body and the shaft with a gap.
【００２８】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.
【００２９】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、軸
部８に設けた段付き部１１の端面と、軸部８の周囲に配
置されたすべり軸受１３の端面との間に形成したスラス
ト方向の隙間Ｌ３を、ロール胴部７の端部に嵌合した部
分の軸部８のスラスト方向長さＬ１より短く設定すれ
ば、軸部８とロール胴部７が外れることなく運転可能で
ある。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, regarding the restraint in the thrust direction, the gap L3 in the thrust direction formed between the end surface of the stepped portion 11 provided on the shaft portion 8 and the end surface of the slide bearing 13 arranged around the shaft portion 8 is If it is set shorter than the thrust direction length L1 of the shaft portion 8 of the portion fitted to the end portion of the roll body portion 7, the shaft portion 8 and the roll body portion 7 can be operated without coming off.
【００３０】同様に、軸部９に設けた段付き部１２の端
面と、軸部９の周囲に配置されたすべり軸受１４の端面
との間に形成したスラスト方向の隙間Ｌ４を、ロール胴
部７の端部に嵌合した部分の軸部９のスラスト方向長さ
Ｌ１より短く設定すれば、軸部９とロール胴部７が外れ
ず運転できる。Similarly, a gap L4 in the thrust direction formed between the end surface of the stepped portion 12 provided on the shaft portion 9 and the end surface of the slide bearing 14 arranged around the shaft portion 9 is provided in the roll body portion. If it is set shorter than the thrust direction length L1 of the shaft portion 9 of the portion fitted to the end portion of 7, the shaft portion 9 and the roll body portion 7 can be operated without coming off.
【００３１】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. .
【００３２】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.
【００３３】[0033]
【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。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.
【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、Ｌ１ 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 sliding bearings, 15 parallel clutches, L1 length in the thrust direction of the shaft part joined to the roll body, L2
Thrust direction length of the shaft part protruding from the end of the roll body, thrust direction gap between the stepped part of the L3 shaft part and the slide bearing, thrust direction between the stepped part and the slide bearing of the L4 shaft part Gap
Claims (4)
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
軸部を嵌合して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 and a shaft are formed of ceramics in a hollow shape, and a shaft is provided at both ends of the roll body so that a gap is provided between an inner surface of the roll body and an outer surface of the shaft. A roll for continuous hot-dip metal plating, characterized by being assembled by fitting
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.
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 roll for continuous hot metal plating according to claim 1, wherein the roll body and the shaft are fitted and assembled by a parallel clutch system or a spline system.
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 |
|---|---|---|---|
| JP2002116411A JP3765485B2 (en) | 2002-04-18 | 2002-04-18 | Roll for continuous molten metal plating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002116411A JP3765485B2 (en) | 2002-04-18 | 2002-04-18 | Roll for continuous molten metal plating |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003306753A true JP2003306753A (en) | 2003-10-31 |
| JP3765485B2 JP3765485B2 (en) | 2006-04-12 |
Family
ID=29397155
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002116411A Expired - Fee Related JP3765485B2 (en) | 2002-04-18 | 2002-04-18 | Roll for continuous molten metal plating |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3765485B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006193812A (en) * | 2005-01-17 | 2006-07-27 | Hitachi Metals Ltd | Roll for hot dip metal plating bath |
| JP2007270244A (en) * | 2006-03-31 | 2007-10-18 | Jfe Steel Kk | Guide roll and hot dip metal coating apparatus |
| KR20200083614A (en) * | 2017-12-21 | 2020-07-08 | 에이케이 스틸 프로퍼티즈 인코포레이티드 | Rolls for use in hot dip coating lines |
| US11142817B2 (en) | 2017-12-21 | 2021-10-12 | Cleveland-Cliffs Steel Properties Inc. | Roll for use in a hot dip coating line |
| US11168388B2 (en) | 2016-04-29 | 2021-11-09 | Cleveland-Cliffs Steel Properties Inc. | Method and apparatus for extending the campaign life of stabilizers for a coating line |
| US11242589B2 (en) | 2016-04-29 | 2022-02-08 | Cleveland-Cliffs Steel Properties Inc. | Method for extending the campaign life of stabilizers for a coating line |
-
2002
- 2002-04-18 JP JP2002116411A patent/JP3765485B2/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006193812A (en) * | 2005-01-17 | 2006-07-27 | Hitachi Metals Ltd | Roll for hot dip metal plating bath |
| JP2007270244A (en) * | 2006-03-31 | 2007-10-18 | Jfe Steel Kk | Guide roll and hot dip metal coating apparatus |
| US11168388B2 (en) | 2016-04-29 | 2021-11-09 | Cleveland-Cliffs Steel Properties Inc. | Method and apparatus for extending the campaign life of stabilizers for a coating line |
| US11242589B2 (en) | 2016-04-29 | 2022-02-08 | Cleveland-Cliffs Steel Properties Inc. | Method for extending the campaign life of stabilizers for a coating line |
| KR20200083614A (en) * | 2017-12-21 | 2020-07-08 | 에이케이 스틸 프로퍼티즈 인코포레이티드 | Rolls for use in hot dip coating lines |
| CN111630201A (en) * | 2017-12-21 | 2020-09-04 | Ak钢铁产权公司 | Roller for hot dip coating line |
| JP2021507117A (en) * | 2017-12-21 | 2021-02-22 | エーケー スティール プロパティ−ズ、インク． | Rolls for use in hot dip galvanizing lines |
| US11142817B2 (en) | 2017-12-21 | 2021-10-12 | Cleveland-Cliffs Steel Properties Inc. | Roll for use in a hot dip coating line |
| US11142816B2 (en) | 2017-12-21 | 2021-10-12 | Cleveland-Cliffs Steel Properties Inc. | Roll for use in a hot dip coating line |
| KR102391567B1 (en) * | 2017-12-21 | 2022-04-29 | 클리블랜드-클리프스 스틸 프로퍼티즈 인코포레이티드 | Rolls for use in hot dip coating lines |
| JP7158121B2 (en) | 2017-12-21 | 2022-10-21 | クリーブランド－クリフス スティール プロパティーズ、インク． | Rolls for use in hot-dip galvanizing lines |
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| Publication number | Publication date |
|---|---|
| JP3765485B2 (en) | 2006-04-12 |
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