JP2873355B2 - Spinning ring - Google Patents
Spinning ringInfo
- Publication number
- JP2873355B2 JP2873355B2 JP41871890A JP41871890A JP2873355B2 JP 2873355 B2 JP2873355 B2 JP 2873355B2 JP 41871890 A JP41871890 A JP 41871890A JP 41871890 A JP41871890 A JP 41871890A JP 2873355 B2 JP2873355 B2 JP 2873355B2
- Authority
- JP
- Japan
- Prior art keywords
- ring
- spinning
- wear
- product
- silicon carbide
- 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.)
- Expired - Lifetime
Links
Landscapes
- Spinning Or Twisting Of Yarns (AREA)
Description
【0001】[0001]
【産業上の利用分野】本発明は紡績の精紡に使用され、
特に高速精紡に於いて優れた性能を発揮する紡機用リン
グに関するものである。The present invention is used for spinning of spinning,
In particular, the present invention relates to a spinning ring that exhibits excellent performance in high-speed spinning.
【0002】[0002]
【従来の技術】従来、紡機用リングは素材としての低炭
素鋼を旋削形成し、表面硬化処理として浸炭焼入処理を
施したものである。しかし従来リングでは、精紡機のス
ピンドル回転数が20000rpm以上の高速回転で使
用すると、リングとトラベラ間の摩擦抵抗が増大し、摩
擦熱が急激に上昇してトラベラが早期に焼きつき、飛散
して連続運転が出来ないという欠点があった。そこで上
記問題点を解決するため、少なくともリングフランジの
表面を炭化珪素で作ったものも提案されている。2. Description of the Related Art Conventionally, a spinning ring is formed by turning a low carbon steel as a raw material and performing a carburizing and quenching treatment as a surface hardening treatment. However, in the conventional ring, when the spinning speed of the spinning machine is higher than 20,000 rpm, the frictional resistance between the ring and the traveler increases. There was a drawback that continuous operation was not possible. Therefore, in order to solve the above problems, there has been proposed a ring flange in which at least the surface is made of silicon carbide.
【0003】しかし、上記改良リングは、炭化珪素粒子
のアスペクト比が2以下であり、破壊靭性KIC(臨界
応力拡大係数)が小さく、スピンドル回転数が2400
0rpm以上の超高速回転域においてはリング表面にク
ラックが入り、チッピングを起こして摩耗し、長期間安
定な紡出を行なえなかった。また、破壊靭性KICが高
い材料として、窒化珪素セラミックが有るが、炭化珪素
に比べ耐熱性が低く、高温での強度、耐酸化性が低い。
また、熱伝導率、耐摩耗性にも劣っている。However, the improved ring has an aspect ratio of silicon carbide particles of 2 or less, a low fracture toughness K IC (critical stress intensity factor), and a spindle rotation speed of 2400.
In the ultra-high-speed rotation range of 0 rpm or more, cracks occurred on the ring surface, causing chipping and abrasion, and stable spinning could not be performed for a long period of time. Silicon nitride ceramic is a material having a high fracture toughness K IC, but has lower heat resistance, lower strength at high temperatures, and lower oxidation resistance than silicon carbide.
In addition, the thermal conductivity and the wear resistance are inferior.
【0004】[0004]
【発明が解決しようとする課題】本発明は、上記従来技
術の問題点に鑑みて超高速回転域において安定操業でき
ると共にリングの摩耗も少なく、寿命が長い紡機用リン
グを得ることにある。SUMMARY OF THE INVENTION It is an object of the present invention to provide a spinning ring which can operate stably in an ultra-high rotation speed range, has a small wear on the ring, and has a long service life.
【0005】[0005]
【課題を解決するための手段】本発明の紡機用リング
は、少なくともトラベラと接触するリングフランジ部
が、アルミナを焼結助剤とし、平均アスペクト比2.5
〜5の板状または柱状の炭化珪素焼結体で形成され、か
つ表面粗さを中心線平均粗さRa0.2μ以下にしたこ
とを特徴とする。According to the spinning ring of the present invention, at least the ring flange portion which comes into contact with the traveler uses alumina as a sintering aid and has an average aspect ratio of 2.5.
5 to 5 and is characterized by having a center line average roughness Ra of 0.2 μm or less.
【0006】通常、ホウ素含有焼結炭化珪素の場合、破
壊靭性KICは2〜3MN・m−3/2で靭性値が低
く、クラックが入り易くチッピングを起こしてしまう。
そこでアルミナを焼結助剤として添加し、約2000℃
の温度で長時間(約10時間以上)焼結する事により、
アルミナを主体とする液相の生成により緻密化が進みさ
らに炭化珪素粒子が粒成長を起こして球状や立方状から
板状あるいは柱状に変化し、炭化珪素のアスペクト比が
増加する。[0006] Normally, in the case of boron-containing sintering silicon carbide, fracture toughness K IC toughness value was low at 2~3MN · m -3/2, would cause the easily chipping cracked.
Therefore, alumina was added as a sintering aid,
By sintering for a long time (about 10 hours or more) at the temperature of
The formation of a liquid phase mainly composed of alumina promotes densification, and further causes the silicon carbide particles to undergo grain growth, changing from spherical or cubic to plate or columnar, and increasing the aspect ratio of silicon carbide.
【0007】炭化珪素粒子のアスペクト比が2.5未満
では破壊靭性KICの値がまだ低く、2.5以上になる
と破壊靭性KICの値は4〜7MN・m−3/2と大き
くなり、5以上では焼結に時間がかかりすぎるようにな
る。また、リングの表面粗さが中心線平均粗さRaが
0.2μをこえるとリングートラベラ間の摺動性が悪化
し、始動時の糸切れが多発するばかりか、高速回転域〜
超高速回転域において、摩擦抵抗指数が急激に上昇し、
トラベラの早期焼きつき、飛散が発生して連続紡出が不
可能となる。[0007] The value of the fracture toughness K IC is less than the aspect ratio of the silicon carbide particles of 2.5 is still low, the value of fracture toughness K IC and of 2.5 or more increases the 4~7MN · m -3/2 If it is 5 or more, it takes too much time for sintering. Further, when the surface roughness of the ring exceeds the center line average roughness Ra of 0.2 μ, the slidability between the ring and the traveler is deteriorated, and not only the yarn breakage at the time of starting frequently occurs, but also the high speed rotation range.
In the ultra-high speed rotation range, the friction resistance index sharply increases,
Premature burning and scattering of the traveler occur, making continuous spinning impossible.
【0008】[0008]
【実施例】以下、本発明の実施例について説明する。平
均粒径1μ以下の炭化珪素粉末に焼結助剤のアルミナを
2.5%添加、混合し、この混合粉末をリング形状の型
の中に入れ、プレス成形する。次に、2000℃1気圧
の非酸化性雰囲気中で15時間焼結を行ない、リング状
の炭化珪素セラミック素材を得る。(本発明品A)また
比較例として、上記素材の焼結時間を1時間(本発明品
B)、5時間(本発明品C)、10時間(本発明品D)
としたもの、およびホウ素を焼結助剤として形成したリ
ング状の炭化珪素セラミック素材(本発明品E)も製作
した。Embodiments of the present invention will be described below. 2.5% of alumina as a sintering aid is added to and mixed with silicon carbide powder having an average particle diameter of 1 μm or less, and the mixed powder is put into a ring-shaped mold and press-molded. Next, sintering is performed in a non-oxidizing atmosphere at 2000 ° C. and 1 atm for 15 hours to obtain a ring-shaped silicon carbide ceramic material. (Product A of the Present Invention) As a comparative example, the sintering time of the above-mentioned material was 1 hour (product B of the present invention), 5 hours (product C of the present invention), and 10 hours (product D of the present invention).
And a ring-shaped silicon carbide ceramic material (product E of the present invention) formed with boron as a sintering aid.
【0009】こうして得られた素材を機械加工や表面機
械加工により、表面粗さをRa0.1μ以下にした紡機
用リングのフランジ部1を製作し、胴部2と接着して図
1に示すような本発明の紡機用リング3を形成した。な
お、胴部は鉄製、軽金属製、樹脂製などを用いる事がで
きる。The thus obtained material is machined or surface-machined to produce a flange portion 1 of a spinning ring having a surface roughness Ra of 0.1 μm or less and adhered to a body portion 2 as shown in FIG. The spinning ring 3 of the present invention was formed. The body may be made of iron, light metal, resin, or the like.
【0010】また、表面粗さの測定はJIS B 06
01−1982に準拠し、下記の条件で行なった。 表面粗さの測定条件 小坂研究所製サーフコーダーSE−30D カットオフ:0.8mm 測定スピード:0.3mm/sec 測定倍率:1000倍 測定長さ:2.5mm 上記の方法で得た紡機用リングを用いて下記の条件にて
紡出テストを行ない、運転時間とリングの摩耗量および
糸切れを測定比較した。[0010] The surface roughness is measured according to JIS B06.
The measurement was carried out under the following conditions in accordance with 01-1982. Measurement conditions of surface roughness Kosaka Laboratory Surfcoder SE-30D Cutoff: 0.8 mm Measurement speed: 0.3 mm / sec Measurement magnification: 1000 times Measurement length: 2.5 mm Spinning ring obtained by the above method , A spinning test was performed under the following conditions, and the operation time, the wear amount of the ring and the yarn breakage were measured and compared.
【0011】テスト条件 糸 :エステル/綿 45番手 リング :3.2mmF 38mmφ×54.0mm
φ リングトラベラ:YS−2/hf 10/0(ニッケル
メッキ品) スピンドル回転数:28000rpm 図2に上記紡出条件で運転した時のリングの摩耗の変化
を示す運転初期では本発明品Aと比較品B〜Dおよび比
較品Eも同じ様な摩耗傾向を示す。運転時間1500時
間を過ぎると、比較品Bおよび比較品Eは摩耗が増大し
始め、運転時間1800時間を過ぎると、比較品Cおよ
び比較品Dも摩耗が増大し始める。本発明品Aは摩耗の
進行は一定である。約6000時間の運転後では、本発
明品Aは比較品Bおよび比較品Eに比ベリングの摩耗は
約1/3程度であり、比較品Cおよび比較品Dに比ベリ
ングの摩耗は約1/2程度であり、より長期にわたって
紡出できる事がわかる。Test conditions Yarn: ester / cotton 45th ring: 3.2 mmF 38 mmφ × 54.0 mm
φ Ring traveler: YS-2 / hf 10/0 (nickel-plated product) Spindle rotation speed: 28000 rpm Figure 2 shows the change in ring wear when operated under the above spinning conditions. The products BD and the comparative product E show the same tendency to wear. After the operation time of 1500 hours, the wear of the comparative product B and the comparative product E starts to increase, and after the operation time of 1800 hours, the wear of the comparative product C and the comparative product D also starts to increase. In the product A of the present invention, the progress of wear is constant. After about 6000 hours of operation, the product A of the present invention had about 1/3 the abrasion wear of the comparative product B and the comparative product E, and the wear of the belling of the comparative product C and the comparative product D was about 1/3. It is about 2 which indicates that spinning can be performed for a longer period.
【0012】比較品Bおよび比較品Eのの約6000時
間運転後のリングのトラベラ滑走面の表面状態は微細な
クラックが表面に無数にみられ、チッピング状の欠けが
多く認められたが、本発明品Aの摩耗面は滑らかで、微
細なクラックの発生は少なかった。[0012] The surface condition of the traveling surface of the ring of the comparative product B and the comparative product E after running for about 6000 hours was innumerable fine cracks and many chipping-like chips were observed on the surface. The wear surface of the invention product A was smooth and the generation of fine cracks was small.
【0013】また、糸切れの変化もリングの摩耗の変化
と同期して摩耗が進行すれば増加するため、本発明品A
の糸切れは約6000時間運転後においても非常に少な
いものとなっている。これは、リングの表面が滑らかで
トラベラの摩耗が少ないたに、トラベラの焼けや飛散が
少なく、安定した滑走状態を保てる為である。The change in thread breakage increases as wear progresses in synchronization with the change in ring wear.
Is very small even after operation for about 6000 hours. This is because the surface of the ring is smooth and the wear of the traveler is small, but the burn and scattering of the traveler are small and a stable sliding state can be maintained.
【0014】また、別途試験片を作成し、破壊靭性を調
査した結果を次に示す。 KIC値MN・m−3/2 本発明品A 5.6 比較品 B 2.1 比較品 C 3.2 比較品 D 3.9 比較品 E 2.4 これにより、破壊靭性が高いほどリングの摩耗が小さ
く、糸切れも少ない事がわかった。なお、焼結助剤のア
ルミナの添加量は1.5%〜20%が良く、1.5%未
満では焼結が充分進まず、焼結体の機械的強度が弱くな
り、20%をこえると炭化珪素の特性が損なわれ、耐熱
性,高温強度が低下するために、リングの耐摩耗性が低
下する。Further, a test piece is prepared separately, and the fracture toughness is adjusted.
The results of the examination are shown below. KICValue MN · m-3/2 Invention product A 5.6 Comparative product B 2.1 Comparative product C 3.2 Comparative product D 3.9 Comparative product E 2.4 As a result, the higher the fracture toughness, the smaller the ring wear.
It turned out that there were few thread breaks. The sintering aid
The amount of lumina added is preferably 1.5% to 20%, and less than 1.5%.
In the full state, sintering does not proceed sufficiently, and the mechanical strength of the sintered body is weak.
If it exceeds 20%, the properties of silicon carbide will be impaired,
The wear resistance of the ring is low due to the decrease in heat resistance and high-temperature strength.
Down.
【0015】[0015]
【発明の効果】本発明品は上記構成になしたので、リン
グ自休の耐摩耗性が向上し、かつ糸切れも減少して、安
定した連続運転が長期にわたってできる。しかも、リン
グトラベラの焼けが発生せず、トラベラ寿命も延長でき
る等の優れた効果を有する発明であるAccording to the present invention having the above-mentioned structure, the abrasion resistance of the self-rest of the ring is improved, the thread breakage is reduced, and stable continuous operation can be performed for a long period of time. Moreover, it is an invention having an excellent effect such that the ring traveler does not burn and the life of the traveler can be extended.
【図1】本発明の紡機用リングの一実施例を示す一部破
断断面図。FIG. 1 is a partially cutaway sectional view showing one embodiment of a spinning ring of the present invention.
【図2】運転時間とリングの摩耗量との関係を示す説明
図である。FIG. 2 is an explanatory diagram showing a relationship between an operation time and a wear amount of a ring.
1 フランジ部 2 胴部 3 紡機用リング DESCRIPTION OF SYMBOLS 1 Flange part 2 Body part 3 Spinning ring
Claims (1)
ランジ部を、アルミナを焼結助剤とする平均アスペクト
比2.5〜5の板状または柱状の炭化珪素焼結体で形成
し、かつ表面粗さを中心線平均粗さRa0.2μ以下に
したことを特徴とする紡機用リング。At least a ring flange portion in contact with a traveler is formed of a plate-like or columnar silicon carbide sintered body having an average aspect ratio of 2.5 to 5 using alumina as a sintering aid, and has a surface roughness. A center line average roughness Ra of 0.2 μm or less.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP41871890A JP2873355B2 (en) | 1990-12-27 | 1990-12-27 | Spinning ring |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP41871890A JP2873355B2 (en) | 1990-12-27 | 1990-12-27 | Spinning ring |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH04241124A JPH04241124A (en) | 1992-08-28 |
JP2873355B2 true JP2873355B2 (en) | 1999-03-24 |
Family
ID=18526512
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP41871890A Expired - Lifetime JP2873355B2 (en) | 1990-12-27 | 1990-12-27 | Spinning ring |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2873355B2 (en) |
-
1990
- 1990-12-27 JP JP41871890A patent/JP2873355B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH04241124A (en) | 1992-08-28 |
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