JP2001187917A - Double row spherical roller bearing - Google Patents

Double row spherical roller bearing

Info

Publication number
JP2001187917A
JP2001187917A JP37521499A JP37521499A JP2001187917A JP 2001187917 A JP2001187917 A JP 2001187917A JP 37521499 A JP37521499 A JP 37521499A JP 37521499 A JP37521499 A JP 37521499A JP 2001187917 A JP2001187917 A JP 2001187917A
Authority
JP
Japan
Prior art keywords
guide wheel
guide ring
ring
roller bearing
tempering
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Withdrawn
Application number
JP37521499A
Other languages
Japanese (ja)
Inventor
Tetsuro Unno
鉄郎 海野
Keizo Hori
惠造 堀
Original Assignee
Nsk Ltd
日本精工株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nsk Ltd, 日本精工株式会社 filed Critical Nsk Ltd
Priority to JP37521499A priority Critical patent/JP2001187917A/en
Publication of JP2001187917A publication Critical patent/JP2001187917A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C23/00Bearings for exclusively rotary movement adjustable for aligning or positioning
    • F16C23/06Ball or roller bearings
    • F16C23/08Ball or roller bearings self-adjusting
    • F16C23/082Ball or roller bearings self-adjusting by means of at least one substantially spherical surface
    • F16C23/086Ball or roller bearings self-adjusting by means of at least one substantially spherical surface forming a track for rolling elements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30Parts of ball or roller bearings
    • F16C33/37Loose spacing bodies
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00Bearings with rolling contact, for exclusively rotary movement
    • F16C19/22Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/34Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load
    • F16C19/38Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers

Abstract

PROBLEM TO BE SOLVED: To provide a double row spherical roller bearing whose thermal deformation of a guide ring is suppressed, that is caused by hardening and tempering treatment. SOLUTION: A manufacturer produces a guide ring 13 of specified measurement and shape by forging, cutting and the like and then oil-hardens the guide ring 13 with specified heating treatment and hardening temperature. In such a case, some camber or distortion occurs at the guide ring 13 due to uneven cooling, etc., at the time of hardening. Afterward, the manufacturer fits the guide ring 13 to a cylindrical first correction mold 31. The guide ring 13 is sandwiched by a circular second correction mold 33 and a disc-like third correction mold 35 from upper and lower sides. Next, the manufacturer carries current to a high frequency heating coil 31 through a tempering control device, and heats the guide ring 13 to a specified tempering temperature while watching it through a thermometer 39. The guide ring 13, temporarily showing plasticity at its system, is corrected in its camber or distortion in the first to third correction molds 31, 33, 35.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【0001】[0001]
【発明の属する技術分野】本発明は、回転軸の支持等に
供される複列球面ころ軸受に係り、詳しくは案内輪の製
造容易化等を図る技術に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double-row spherical roller bearing used for supporting a rotary shaft and the like, and more particularly to a technique for facilitating the manufacture of guide wheels.
【0002】[0002]
【従来の技術】軸とハウジングとの間の芯ずれが避けら
れない場合や、振動機械等で回転軸に撓みが生じやすい
場合等に用いられる自動調芯軸受として、複列球面ころ
軸受が多用されている。複列球面ころ軸受は、軸受中心
を曲率中心とする凹球面状の軌道を有する外輪と、二列
の軌道を有する内輪と、内外輪の軌道間に配設された二
列のころとを備えており、外輪の中心軸線と内輪の中心
軸線との間には所定の交角が許容される。通常、複列球
面ころ軸受では、ころのスキューを防止するため、保持
器と共に案内輪を用いることが多い。案内輪は、高炭素
クロム軸受鋼等を素材とする薄肉のリング状部品であ
り、保持器の内輪側あるいは外輪側に配設されている。
2. Description of the Related Art Double-row spherical roller bearings are frequently used as self-aligning bearings in cases where misalignment between the shaft and the housing is unavoidable, or where the rotating shaft is likely to bend by vibrating machines or the like. Have been. The double-row spherical roller bearing includes an outer ring having a concave spherical track whose center of curvature is the bearing center, an inner ring having two rows of tracks, and two rows of rollers disposed between the tracks of the inner and outer rings. A predetermined intersection angle is allowed between the center axis of the outer ring and the center axis of the inner ring. In general, a double row spherical roller bearing often uses a guide wheel together with a retainer in order to prevent skew of the rollers. The guide wheel is a thin ring-shaped component made of high carbon chromium bearing steel or the like, and is disposed on the inner ring side or the outer ring side of the cage.
【0003】案内輪は、回転するころがその側面に摺接
するため、摩耗防止を図るべく表面硬化処理が施され
る。案内輪の表面硬化法としては、従来よりタフトライ
ド処理が一般に採用されていたが、この方法では硬化深
さがごく浅い(0.005〜0.02mm程度)ため、
振動環境下等で案内輪に衝撃や重荷重が加わる場合には
表面剥離が生じる虞があった。また、タフトライド処理
にはシアン化塩が使用されるため、作業衛生上の問題が
発生する他、毒性の高い廃液の処理も困難であった。そ
こで、タフトライド処理に代わる表面硬化法として、焼
入れ・焼戻し処理が一部に採用されている。焼入れ・焼
戻し処理によれば、案内輪の比較的深部(0.03〜
0.5mm)まで硬化させることが可能となると共に、
タフトライド処理の場合のような毒性の高い薬品を用い
る必要もなくなる。
[0003] The guide rollers are subjected to a surface hardening treatment in order to prevent abrasion because the rolling rollers are in sliding contact with the side surfaces. As a surface hardening method for guide wheels, a tufftriding treatment has been generally adopted in the past. However, this method has a very shallow hardening depth (about 0.005 to 0.02 mm).
When an impact or heavy load is applied to the guide wheel in a vibration environment or the like, surface peeling may occur. Further, since a cyanide salt is used in the tuftride treatment, there is a problem in working hygiene, and it has been difficult to treat a highly toxic waste liquid. Therefore, quenching and tempering treatments have been partially adopted as a surface hardening method instead of the tuftride treatment. According to the quenching / tempering process, a relatively deep portion of the guide wheel (0.03 to
0.5mm)
There is no need to use highly toxic chemicals as in the case of the tuftride treatment.
【0004】[0004]
【発明が解決しようとする課題】しかしながら、薄肉の
案内輪に焼入れ・焼戻し処理を行った場合、いわゆる熱
処理変形を起こすことが多く、そのまま組み込んだ場合
には軸受が正常に回転しなくなるおそれがある。そのた
め、焼入れ・焼戻し処理を施した案内輪は、研削加工に
より正規の寸法形状に仕上げる必要があり、加工工数お
よび製造コストの増大を余儀なくされていた。本発明
は、上記状況に鑑みなされたもので、熱処理後に機械加
工を施すことなく高硬度かつ高寸法精度を有した案内輪
を用いた複列球面ころ軸受を提供することを目的とす
る。
However, when quenching / tempering treatment is performed on a thin guide wheel, so-called heat treatment deformation often occurs, and when the guide wheel is directly incorporated, the bearing may not rotate normally. . For this reason, the quenched and tempered guide wheels need to be finished to a regular size and shape by grinding, and the number of working steps and manufacturing costs have been increased. The present invention has been made in view of the above circumstances, and has as its object to provide a double-row spherical roller bearing using a guide wheel having high hardness and high dimensional accuracy without performing mechanical processing after heat treatment.
【0005】[0005]
【課題を解決するための手段】上記課題を解決するため
に、請求項1の発明では、軸受中心を曲率中心とする凹
球面状の軌道を有する外輪と、二列の軌道を有する内輪
と、保持器と案内輪とを介して前記内外輪の軌道間に配
設された二列の樽形ころとを備えた複列球面ころ軸受で
あって、前記案内輪が、その外周面、内周面および端面
のうち少なくとも一つを拘束された状態において、焼入
れまたは焼戻し処理を施されたものを提案する。
In order to solve the above problems, according to the first aspect of the present invention, there is provided an outer ring having a concave spherical orbit having a center of curvature as a center of a bearing, an inner ring having two rows of orbits, A double-row spherical roller bearing comprising two rows of barrel rollers disposed between raceways of the inner and outer rings via a retainer and a guide wheel, wherein the guide wheel has an outer peripheral surface and an inner peripheral surface. A quenching or tempering treatment in which at least one of the face and the end face is restrained is proposed.
【0006】本発明によれば、例えば、矯正型内で焼入
れ処理または焼戻し処理を施されることにより、案内輪
の熱処理変形が許容限度以下に抑えられる。
According to the present invention, for example, by performing quenching or tempering in a straightening mold, the heat treatment deformation of the guide wheel can be suppressed to an allowable limit or less.
【0007】また、請求項2の発明では、軸受中心を曲
率中心とする凹球面状の軌道を有する外輪と、二列の軌
道を有する内輪と、保持器と案内輪とを介して前記内外
輪の軌道間に配設された二列の樽形ころとを備えた複列
球面ころ軸受であって、前記案内輪が、高圧ガス雰囲気
中で焼入れ処理を施されたものを提案する。
According to the second aspect of the present invention, the outer ring having a concave spherical track whose center is the center of curvature of the bearing, the inner ring having two rows of tracks, and the inner and outer rings via a retainer and a guide wheel. The present invention proposes a double-row spherical roller bearing provided with two rows of barrel-shaped rollers disposed between the tracks, wherein the guide wheels are subjected to a quenching treatment in a high-pressure gas atmosphere.
【0008】本発明によれば、焼入れ冷媒として高圧ガ
スを用いることで、ワークの冷却が油焼入れ等に比して
均一かつ迅速に行われるため、不均一冷却に起因する案
内輪の熱処理変形が許容限度以下に抑えられる。
According to the present invention, by using a high-pressure gas as a quenching refrigerant, the cooling of the work is performed uniformly and quickly as compared with oil quenching or the like. It is kept below the allowable limit.
【0009】また、請求項3の発明では、軸受中心を曲
率中心とする凹球面状の軌道を有する外輪と、二列の軌
道を有する内輪と、保持器と案内輪とを介して前記内外
輪の軌道間に配設された二列の樽形ころとを備えた複列
球面ころ軸受であって、前記案内輪が、オーステンパ処
理を施されたものを提案する。
According to the third aspect of the present invention, the inner and outer rings have an outer ring having a concave spherical track whose center of curvature is the center of the bearing, an inner ring having two rows of tracks, and a retainer and a guide wheel. The present invention proposes a double-row spherical roller bearing having two rows of barrel rollers disposed between the tracks, wherein the guide wheels have been subjected to austempering.
【0010】本発明によれば、例えば、焼入れ冷媒とし
て溶融塩等を用いることで、ワークの冷却が油焼入れ等
に比して均一かつ迅速に行われるため、ワークの変態が
S曲線を利用した等温変態により拡散変態であるベイナ
イト変態となることも相俟って、靭性が高くかつ熱処理
変形が許容限度以下に抑えられた案内輪が得られる。
According to the present invention, for example, by using a molten salt or the like as a quenching refrigerant, the work can be cooled more uniformly and quickly than oil quenching or the like. The bainite transformation, which is a diffusion transformation due to the isothermal transformation, is combined with this, so that a guide wheel having high toughness and heat treatment deformation suppressed to an allowable limit or less can be obtained.
【0011】[0011]
【発明の実施の形態】以下、本発明の実施形態を図面に
基づき詳細に説明する。図1は本発明の実施形態に係る
複列球面ころ軸受を示す半裁縦断面図である。同図にお
いて、複列球面ころ軸受は、軸受中心を曲率中心とする
凹球面状の軌道3を有する外輪1と、二列の軌道7を有
する内輪5と、外輪1および内輪5の軌道3,7間に配
設された二列の樽形ころ(以下、単にころと記す)9と
を備えると共に、保持器11と内外輪5側の2列の軌道
7間にテーパ断面形状の案内輪13が保持されている。
案内輪13は、図2に示した形状で、保持器11とは隙
間をもって対峙している。尚、この複列球面ころ軸受を
機械に組み込む際には、ころ9のプレス保持器11から
の脱落を防止するべく、特開平5−157116号公報
等に記載されたような脱落防止手段が必要となるが、発
明の主旨とは直接関係しないためその図示等は省略す
る。
Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a half longitudinal sectional view showing a double row spherical roller bearing according to an embodiment of the present invention. In the figure, a double-row spherical roller bearing includes an outer race 1 having a concave spherical raceway 3 whose center of curvature is a bearing center, an inner race 5 having two rows of raceways 7, a raceway 3 of the outer race 1 and the inner race 5, And two rows of barrel-shaped rollers (hereinafter simply referred to as rollers) 9 disposed between the guide wheels 13 and a guide wheel 13 having a tapered cross section between the cage 11 and the two rows of raceways 7 on the inner and outer ring 5 side. Is held.
The guide wheel 13 has a shape shown in FIG. 2 and faces the retainer 11 with a gap. When the double row spherical roller bearing is incorporated in a machine, a means for preventing falling as described in Japanese Patent Application Laid-Open No. Hei 5-157116 is required in order to prevent the roller 9 from falling off the press holder 11. However, since it is not directly related to the gist of the invention, the illustration and the like are omitted.
【0012】第1実施形態では、案内輪13は、SUJ
2(高炭素クロム軸受鋼)を素材として、以下に述べる
手順で製造される。すなわち、製造作業者は先ず、鍛造
や切削加工等により所定の寸法・形状の案内輪13を製
作した後、所定の加熱処理(例えば、1113゜Kで1
3分)と焼入れ温度(例えば、333゜K)をもって案
内輪13を油焼入れする。この際、案内輪13には、焼
入れ時の不均一冷却等により、多少なりとも反りや歪み
が生じる。しかる後、製造作業者は、図3に示したよう
に、案内輪13を筒状の第1矯正型31内に嵌入させ、
円環状の第2矯正型33と円盤状の第3矯正型35とに
より所定の圧力(例えば、1トン)をもって案内輪13
を上下から挟圧する。尚、本実施形態の場合、第1〜第
3矯正型31,33,35はセラミックスを素材として
いる。図3中、符号37で示した部材は第1矯正型31
の外周に配設された高周波加熱コイル、符号39で示し
た部材は非接触式の温度計であり、共に図示しない焼戻
し制御装置に接続されている。
In the first embodiment, the guide wheels 13 are
2 (high carbon chromium bearing steel) as a raw material in the following procedure. That is, the manufacturing worker first manufactures the guide wheel 13 having a predetermined size and shape by forging, cutting, or the like, and then performs a predetermined heat treatment (for example, one heat treatment at 1113 ° K).
The guide wheel 13 is oil-hardened at a quenching temperature (for example, 333 ° K) for 3 minutes). At this time, the guide wheel 13 is slightly warped or distorted due to uneven cooling or the like during quenching. Thereafter, the manufacturing worker fits the guide wheel 13 into the cylindrical first correction mold 31, as shown in FIG.
The guide wheel 13 is provided with a predetermined pressure (for example, 1 ton) by the annular second correction mold 33 and the disc-shaped third correction mold 35.
Is pressed from above and below. In the case of the present embodiment, the first to third correction dies 31, 33, 35 are made of ceramic. In FIG. 3, the member indicated by reference numeral 37 is the first correction mold 31.
A high-frequency heating coil disposed on the outer periphery of the device is a non-contact type thermometer, and is connected to a tempering control device (not shown).
【0013】次に、製造作業者は、焼戻し制御装置を介
して高周波加熱コイル37に通電し、温度計39により
監視しながら案内輪13を所定の焼戻し温度(本実施形
態では、520〜770゜K)に加熱する。これによ
り、案内輪13中では、固溶炭素がε−炭化物として析
出拡散し、マルテンサイト組織が正方晶から立方晶に変
化して靭性が向上する。一方、案内輪13は、焼戻しの
過程においてその組織に一時的に可塑性が現れるため、
第1〜第3矯正型31,33,35内で反りや歪みが矯
正される。尚、本実施形態では、各矯正型31,33,
35の素材として線膨張係数が鋼の1/5程度であるセ
ラミックスを用いたため、焼戻し時には案内輪13が矯
正型31,33,35により強い圧力で圧縮・矯正され
る。
Next, the manufacturing worker energizes the high-frequency heating coil 37 via the tempering control device, and monitors the guide wheel 13 at a predetermined tempering temperature (520 to 770 ° in this embodiment) while monitoring with the thermometer 39. Heat to K). As a result, in the guide wheel 13, the solute carbon precipitates and diffuses as ε-carbide, and the martensite structure changes from tetragonal to cubic to improve toughness. On the other hand, since the guide wheel 13 temporarily shows plasticity in its structure during the tempering process,
Warpage and distortion are corrected in the first to third correction molds 31, 33, 35. In the present embodiment, each correction mold 31, 33,
Since a ceramic having a linear expansion coefficient of about 1/5 of steel is used as the material of 35, the guide wheel 13 is compressed and straightened by the straightening dies 31, 33, and 35 with strong pressure during tempering.
【0014】第1実施形態では、このような焼戻し方法
を採ったことにより、案内輪13の表面から1.5mm
(芯部)の部位でHRC50以上の硬度を得ながら、熱
変形をごく小さく抑えることができた。図4には、SU
J2あるいはS48C(機械構造用炭素鋼)を素材とす
る案内輪13を用い、本実施形態の矯正焼戻しと従来の
通常焼戻しを行った後の変形量(反り)をグラフにより
示してある。A,BはSUJ2を素材とする案内輪13
に対して矯正焼戻しを行った例であり、C,DはS48
Cを素材とする案内輪13に対して矯正焼戻しを行った
例であり、E,FはSUJ2を素材とする案内輪13に
対して通常焼戻しを行った例であり、G,HはS48C
を素材とする案内輪13に対して通常焼戻しを行った例
である。このグラフから判るように、通常焼戻しを行っ
た場合には反りが0.2mm程度生じていたが、矯正焼
戻しを行った場合には反りが0.05mm以下に抑えら
れている。
In the first embodiment, by adopting such a tempering method, 1.5 mm from the surface of the guide wheel 13 is obtained.
While obtaining a hardness of HRC 50 or more at the (core) portion, thermal deformation could be suppressed to a very small value. FIG.
Using a guide wheel 13 made of J2 or S48C (carbon steel for machine structural use) as a material, the amount of deformation (warpage) after performing the correction tempering of the present embodiment and the conventional normal tempering is shown in a graph. A and B are guide wheels 13 made of SUJ2
This is an example in which straightening and tempering were performed on C.D.
E and F are examples in which normal tempering is performed on the guide wheel 13 made of SUJ2, and G and H are examples in which S48C is used.
This is an example in which normal tempering is performed on a guide wheel 13 made of a material. As can be seen from this graph, the warpage was about 0.2 mm when the normal tempering was performed, but the warpage was suppressed to 0.05 mm or less when the corrective tempering was performed.
【0015】次に、矯正型を用いない第2,第3実施形
態を説明する。これらの実施形態は、第1実施形態と同
様のワークに対して所定の加熱処理(例えば、1113
゜Kで13分)を行った後、その焼入れ方法を変更した
ものである。すなわち、第2実施形態は、高圧ガス雰囲
気中で焼入れ処理を施す第2請求項に対応するもので、
焼入れ冷媒として高圧ガス(本実施形態では、1MPa
のヘリウムガス)を用いた。また、第3実施形態は、オ
ーステンパ処理を施す第3請求項に対応するもので、所
定温度(本実施形態では、573゜K)の溶融塩を用
い、所定時間(本実施形態では、60分)の冷却、等温
保持を行った。
Next, the second and third embodiments using no correction mold will be described. In these embodiments, a predetermined heat treatment (for example, 1113) is performed on a workpiece similar to the first embodiment.
(13K for 13 minutes), and then the quenching method was changed. That is, the second embodiment corresponds to the second aspect in which quenching is performed in a high-pressure gas atmosphere.
High pressure gas (in this embodiment, 1 MPa
Helium gas) was used. The third embodiment corresponds to the third aspect of the invention in which an austempering process is performed. The third embodiment uses a molten salt at a predetermined temperature (573 ° K in the present embodiment) for a predetermined time (60 minutes in the present embodiment). ) And isothermal holding.
【0016】図7は焼入れによる案内輪13の反り量を
示すグラフであり、この図から判るように、第1実施形
態の油焼入れ(a)では反り量が0.2mmを超えてい
るのに対し、第2実施形態の焼入れ(b)や第3実施形
態の焼入れ(c)ではいずれもこれを0.1mm以下に
することができた。
FIG. 7 is a graph showing the amount of warpage of the guide wheel 13 due to quenching. As can be seen from this figure, in the oil quenching (a) of the first embodiment, the warpage exceeds 0.2 mm. On the other hand, in the quenching (b) of the second embodiment and the quenching (c) of the third embodiment, both were able to be reduced to 0.1 mm or less.
【0017】この結果は、第2実施形態においては、冷
却媒体に高圧ガスを用いたことにより、ワークの冷却が
従来の油焼入れに比して均一かつ迅速に行われ、不均一
冷却に起因する熱処理変形が小さく抑えられることによ
る。第2実施形態では、焼入れ後の表面硬度として83
5Hvが得られ、焼き戻し処理を行った後においても、
案内輪13に要求される表面硬度が十分に確保できた。
尚、第2実施形態では、焼入れ後の洗浄や乾燥を行う必
要がないため、製造時間や工数の短縮が図れる利点があ
る。
The result is that, in the second embodiment, the use of the high-pressure gas as the cooling medium allows the work to be cooled more uniformly and quickly than in the conventional oil quenching, resulting from uneven cooling. This is because deformation due to heat treatment can be suppressed to a small value. In the second embodiment, the surface hardness after quenching is 83
5Hv is obtained, and even after performing the tempering process,
The surface hardness required for the guide wheel 13 was sufficiently secured.
In the second embodiment, since there is no need to perform cleaning and drying after quenching, there is an advantage that the manufacturing time and the number of steps can be reduced.
【0018】また、第3実施形態においては、冷却媒体
に冷却能が高くかつ冷却時に蒸気膜段階が生じない溶融
塩を用いたことにより、やはりワークの冷却が従来の油
焼入れに比して均一かつ迅速に行われ、不均一冷却に起
因する熱処理変形が小さく抑えられることによる。更
に、油焼入れでは格子歪みの大きな無拡散変態であるマ
ルテンサイト変態が生じているのに対し、オ−ステンパ
処理では拡散変態であるベイナイト変態が生じるため、
この同素変態の相違が熱処理変形の大小の一因ともなっ
ている。第3実施形態では、焼入れ後の表面硬度として
580Hvが得られ、案内輪13に要求される表面硬度
が十分に確保できた。尚、第2実施形態では、数時間を
要する焼き戻し工程が不要となるため、製造時間や工数
の大幅な短縮が図れる利点がある。
Further, in the third embodiment, the use of a molten salt having a high cooling ability and not causing a vapor film stage at the time of cooling in the cooling medium makes it possible to cool the work more uniformly than in the conventional oil quenching. This is because the heat treatment is performed quickly and the heat treatment deformation due to the non-uniform cooling is kept small. Further, in oil quenching, martensitic transformation, which is a non-diffusion transformation with a large lattice distortion, occurs, whereas in austempering, bainite transformation, which is a diffusion transformation, occurs.
This difference in allotropic transformation contributes to the magnitude of heat treatment deformation. In the third embodiment, 580 Hv was obtained as the surface hardness after quenching, and the surface hardness required for the guide wheel 13 was sufficiently secured. In the second embodiment, a tempering step that requires several hours is not required, and thus there is an advantage that the manufacturing time and the number of steps can be significantly reduced.
【0019】図8は上記各実施形態と従来装置との比較
を示す表であり、反り量の欄には熱処理後の平面歪み量
を示し、後加工の欄には熱処理後の機械加工の有無を示
し、表面硬さの欄には熱処理後の表面硬度(ビッカース
硬度)を示し、回転状況の欄には案内輪13を複列球面
ころ軸受に組み込んだ際における回転状況の不具合の有
無を示してある。図8から判るように、本発明の各実施
形態では、熱処理後の反り量がいずれも0.1mm以下
であり、後加工を必要とすることなく、良好な回転が得
られた。尚、従来装置では、後加工により反りを矯正し
た場合には良好な回転が得られるが、後加工を施さない
場合には回転状況に不具合が生じた。
FIG. 8 is a table showing a comparison between the above embodiments and the conventional apparatus. The column of the amount of warpage shows the amount of plane distortion after the heat treatment, and the column of the post-processing shows the presence or absence of machining after the heat treatment. In the column of surface hardness, the surface hardness (Vickers hardness) after the heat treatment is shown, and in the column of the rotation condition, the presence or absence of a failure in the rotation condition when the guide wheel 13 is incorporated into the double row spherical roller bearing is shown. It is. As can be seen from FIG. 8, in each of the embodiments of the present invention, the amount of warpage after the heat treatment was 0.1 mm or less, and good rotation was obtained without requiring post-processing. In the conventional apparatus, when the warpage is corrected by the post-processing, a good rotation can be obtained, but when the post-processing is not performed, a problem occurs in the rotation state.
【0020】すなわち、従来装置では、硬化熱処理され
た案内輪は後加工によって変形量(反り量)を0.1m
m程度に調整して複列球面ころ軸受に組み込まれていた
が、本発明を採用することにより、複列球面ころ軸受の
回転時に不具合を起こさない反り量が0.1mm以下の
案内輪を後加工無しに製造でき、製造コストや納期の面
で大きなメリットを得ることができるのである。
That is, in the conventional apparatus, the guide wheel subjected to the hardening heat treatment has a deformation (warpage) of 0.1 m due to the post-processing.
m, and incorporated into the double-row spherical roller bearing. By adopting the present invention, the guide wheel with a warpage of 0.1 mm or less that does not cause a problem when rotating the double-row spherical roller bearing is provided. It can be manufactured without any processing, and significant advantages can be obtained in terms of manufacturing cost and delivery time.
【0021】以上で具体的実施形態の説明を終えるが、
本発明の態様は上記各実施形態に限られるものではな
く、図5,図6に示す外輪1側に配設された案内輪13
に対して適用してもよい。なお、図5に示す複列球面こ
ろ軸受の場合、保持器11は二体形の略Z字断面形状の
プレス成形品であり、また案内輪13の外周には図6に
示す如く外周に外輪1に組み込むための平行カット部1
5が形成されている。また、第1実施形態では、矯正型
の素材としてセラミックスを用いたが、非磁性鋼や、ア
ルミニウム合金、黄銅等を用いてもよいし、拘束型によ
る拘束を焼入れ時に行ってもよいし、案内輪の外周面や
内周面を拘束した状態において焼入れまたは焼戻し処理
を行ってもよい。また、第2実施形態においては、ヘリ
ウムガス以外の高圧ガスを用いてもよいし、例示した圧
力で行わなくともよい。また、第3実施形態において
も、溶融塩の温度や焼入れ時間は適宜変更可能である。
また、保持器や案内輪等の具体的形状等についても、設
計上の都合等により適宜変更可能である。
The description of the specific embodiment is completed above.
The aspect of the present invention is not limited to the above embodiments, and the guide wheels 13 arranged on the outer ring 1 side shown in FIGS.
May be applied. In the case of the double row spherical roller bearing shown in FIG. 5, the retainer 11 is a two-piece press-formed product having a substantially Z-shaped cross-section, and the outer periphery of the guide wheel 13 is provided on the outer periphery as shown in FIG. Parallel cut part 1 for incorporation into
5 are formed. In the first embodiment, the ceramic is used as the material of the straightening type. However, non-magnetic steel, an aluminum alloy, brass, or the like may be used. The quenching or tempering treatment may be performed in a state where the outer peripheral surface or the inner peripheral surface of the ring is restrained. In the second embodiment, a high-pressure gas other than the helium gas may be used, or the pressure may not be set at the illustrated pressure. Also in the third embodiment, the temperature and the quenching time of the molten salt can be changed as appropriate.
In addition, the specific shape of the retainer, the guide wheel, and the like can be appropriately changed depending on design convenience and the like.
【0022】[0022]
【発明の効果】以上の説明から明らかなように、請求項
1の発明によれば、軸受中心を曲率中心とする凹球面状
の軌道を有する外輪と、二列の軌道を有する内輪と、保
持器と案内輪とを介して前記内外輪の軌道間に配設され
た二列の樽形ころとを備えた複列球面ころ軸受であっ
て、前記案内輪が、その外周面、内周面および端面のう
ち少なくとも一つを拘束された状態において、焼入れま
たは焼戻し処理を施されたものとしたため、例えば、矯
正型内で焼入れ処理または焼戻し処理を施されることに
より、案内輪の熱処理変形が許容限度以下に抑えられ、
案内輪の後加工が不要となって工数や製造時間が短縮で
きる。
As is apparent from the above description, according to the first aspect of the present invention, the outer ring having the concave spherical orbit with the center of curvature being the center of the bearing, the inner ring having the two rows of orbits, A double row spherical roller bearing provided with two rows of barrel rollers disposed between the raceways of the inner and outer rings via a vessel and a guide wheel, wherein the guide wheel has an outer peripheral surface and an inner peripheral surface thereof. And, in a state where at least one of the end faces is constrained, quenching or tempering treatment is performed, for example, by performing quenching or tempering treatment in a straightening mold, heat treatment deformation of the guide wheel Below the permissible limit,
No post-processing of the guide wheels is required, and man-hours and manufacturing time can be reduced.
【0023】また、請求項2の発明によれば、軸受中心
を曲率中心とする凹球面状の軌道を有する外輪と、二列
の軌道を有する内輪と、保持器と案内輪とを介して前記
内外輪の軌道間に配設された二列の樽形ころとを備えた
複列球面ころ軸受であって、前記案内輪が、高圧ガス雰
囲気中で焼入れ処理を施されたものとしたため、ワーク
の冷却が油焼入れ等に比して均一かつ迅速に行われ、不
均一冷却に起因する案内輪の熱処理変形が許容限度以下
に抑えられ、案内輪の後加工が不要となって工数や製造
時間が短縮できる。
According to the second aspect of the present invention, the outer ring having a concave spherical track whose center is the center of curvature of the bearing, the inner ring having two rows of tracks, the retainer and the guide wheel are used. A double-row spherical roller bearing comprising two rows of barrel rollers disposed between the raceways of the inner and outer rings, wherein the guide wheels are subjected to a quenching treatment in a high-pressure gas atmosphere. Cooling is performed uniformly and quickly compared to oil quenching, etc., heat treatment deformation of the guide wheel due to uneven cooling is kept below the allowable limit, and post-processing of the guide wheel is not required, so man-hours and manufacturing time Can be shortened.
【0024】また、請求項3の発明によれば、軸受中心
を曲率中心とする凹球面状の軌道を有する外輪と、二列
の軌道を有する内輪と、保持器と案内輪とを介して前記
内外輪の軌道間に配設された二列の樽形ころとを備えた
複列球面ころ軸受であって、記案内輪が、オーステンパ
処理を施されたものとしたため、例えば、焼入れ冷媒と
して溶融塩等を用いることで、ワークの冷却が油焼入れ
等に比して均一かつ迅速に行われ、ワークの変態がS曲
線を利用した等温変態により拡散変態であるベイナイト
変態となることも相俟って、靭性が高くかつ熱処理変形
が許容限度以下に抑えられた案内輪が得られ、案内輪の
後加工が不要となって工数や製造時間が短縮できる。
According to the third aspect of the present invention, the outer ring having a concave spherical track whose center is the center of curvature of the bearing, the inner ring having two rows of tracks, the retainer and the guide wheel are used. A double-row spherical roller bearing comprising two rows of barrel rollers disposed between the raceways of the inner and outer rings, wherein the guide wheels are subjected to austempering, so that, for example, they are melted as a quenching refrigerant. By using a salt or the like, the cooling of the work is performed uniformly and quickly as compared with oil quenching and the like, and the transformation of the work becomes bainite transformation which is a diffusion transformation by isothermal transformation using the S curve. As a result, a guide wheel having high toughness and heat treatment deformation less than the allowable limit can be obtained, and post-processing of the guide wheel becomes unnecessary, so that the number of steps and the manufacturing time can be reduced.
【図面の簡単な説明】[Brief description of the drawings]
【図1】実施形態に係る複列球面ころ軸受を示す半裁縦
断面図である。
FIG. 1 is a half longitudinal sectional view showing a double row spherical roller bearing according to an embodiment.
【図2】実施形態における案内輪を示す半裁正面図であ
る。
FIG. 2 is a half cut front view showing a guide wheel in the embodiment.
【図3】実施形態における焼き戻し工程を示す説明図で
ある。
FIG. 3 is an explanatory diagram showing a tempering step in the embodiment.
【図4】実施形態の矯正焼戻しと通常焼戻しを行った後
の変形量(反り)を示すグラフである。
FIG. 4 is a graph showing an amount of deformation (warpage) after performing a correction tempering and a normal tempering according to the embodiment.
【図5】本発明が適用可能な複列球面ころ軸受の他の例
を示す半裁縦断面図である。
FIG. 5 is a half vertical sectional view showing another example of a double row spherical roller bearing to which the present invention can be applied.
【図6】同例における案内輪を示す半裁正面図である。FIG. 6 is a half-cut front view showing a guide wheel in the example.
【図7】焼入れによる案内輪の反り量を示すグラフであ
る。
FIG. 7 is a graph showing the amount of warpage of the guide wheels due to quenching.
【図8】各実施形態と従来装置との比較を示す表であ
る。
FIG. 8 is a table showing a comparison between each embodiment and a conventional device.
【符号の説明】[Explanation of symbols]
1‥‥外輪 3‥‥軌道 5‥‥内輪 7‥‥軌道 9‥‥ころ 11‥‥プレス保持器 13‥‥案内輪 31,33,35‥‥矯正型 37‥‥高周波加熱コイル 39‥‥温度計 1 outer race 3 raceway 5 inner raceway 7 raceway 9 roller 11 roll press retainer 13 guide wheel 31, 33, 35 correction type 37 high frequency heating coil 39 temperature Total

Claims (3)

    【特許請求の範囲】[Claims]
  1. 【請求項1】軸受中心を曲率中心とする凹球面状の軌道
    を有する外輪と、二列の軌道を有する内輪と、保持器と
    案内輪とを介して前記内外輪の軌道間に配設された二列
    の樽形ころとを備えた複列球面ころ軸受であって、 前記案内輪が、その外周面、内周面および端面のうち少
    なくとも一つを拘束された状態において、焼入れまたは
    焼戻し処理を施されたものであることを特徴とする複列
    球面ころ軸受。
    1. An outer ring having a concave spherical raceway centered on the center of curvature of a bearing center, an inner ring having two rows of raceways, and a raceway between the inner and outer rings via a retainer and a guide wheel. A double row spherical roller bearing comprising two rows of barrel rollers, wherein the guide wheel is quenched or tempered in a state in which at least one of an outer peripheral surface, an inner peripheral surface, and an end surface is restricted. Double row spherical roller bearing characterized by having been subjected to the following.
  2. 【請求項2】軸受中心を曲率中心とする凹球面状の軌道
    を有する外輪と、二列の軌道を有する内輪と、保持器と
    案内輪とを介して前記内外輪の軌道間に配設された二列
    の樽形ころとを備えた複列球面ころ軸受であって、 前記案内輪が、高圧ガス雰囲気中で焼入れ処理を施され
    たものであることを特徴とする複列球面ころ軸受。
    2. An outer ring having a concave spherical track whose center of curvature is a bearing center, an inner ring having two rows of tracks, and a track between the inner and outer rings via a retainer and a guide wheel. A double-row spherical roller bearing comprising two rows of barrel rollers, wherein the guide wheel is subjected to a quenching treatment in a high-pressure gas atmosphere.
  3. 【請求項3】軸受中心を曲率中心とする凹球面状の軌道
    を有する外輪と、二列の軌道を有する内輪と、保持器と
    案内輪とを介して前記内外輪の軌道間に配設された二列
    の樽形ころとを備えた複列球面ころ軸受であって、 前記案内輪が、オーステンパ処理を施されたものである
    ことを特徴とする複列球面ころ軸受。
    3. An outer ring having a concave spherical track whose center of curvature is a bearing center, an inner ring having two rows of tracks, and a track between the inner and outer rings via a retainer and a guide wheel. A double row spherical roller bearing comprising two rows of barrel rollers, wherein the guide wheel is subjected to austempering.
JP37521499A 1999-12-28 1999-12-28 Double row spherical roller bearing Withdrawn JP2001187917A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP37521499A JP2001187917A (en) 1999-12-28 1999-12-28 Double row spherical roller bearing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP37521499A JP2001187917A (en) 1999-12-28 1999-12-28 Double row spherical roller bearing

Publications (1)

Publication Number Publication Date
JP2001187917A true JP2001187917A (en) 2001-07-10

Family

ID=18505164

Family Applications (1)

Application Number Title Priority Date Filing Date
JP37521499A Withdrawn JP2001187917A (en) 1999-12-28 1999-12-28 Double row spherical roller bearing

Country Status (1)

Country Link
JP (1) JP2001187917A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106048186A (en) * 2016-07-28 2016-10-26 共享铸钢有限公司 Deformation-prevention heat treatment method for large thin-wall steel casting
CN111843383A (en) * 2020-07-16 2020-10-30 嘉善迈德机械有限公司 Manufacturing process of self-lubricating bearing

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106048186A (en) * 2016-07-28 2016-10-26 共享铸钢有限公司 Deformation-prevention heat treatment method for large thin-wall steel casting
CN111843383A (en) * 2020-07-16 2020-10-30 嘉善迈德机械有限公司 Manufacturing process of self-lubricating bearing

Similar Documents

Publication Publication Date Title
CN1863931B (en) Thin-walled part producing method, bearing raceway ring, thrust needle roller bearing, rolling bearing raceway ring producing method, rolling bearing raceway ring, and rolling bearing
JP2005042879A (en) Roller bearing with race ring formed of steel plate
JP3965525B2 (en) Method of manufacturing bearing ring for ball bearing
EP2666875A1 (en) Method for manufacturing bearing ring, bearing ring, and rolling bearing
JP4178980B2 (en) Method for heat treatment of annular member
US20110081106A1 (en) Manufacturing method of thin component, bearing ring, thrust needle roller bearing, manufacturing method of rolling bearing ring, rolling bearing ring, and rolling bearing
EP2514844A2 (en) Rolling sliding member, method of manufacturing the same, and rolling bearing
JP4627981B2 (en) Manufacturing method of thin bearing race
JP5433932B2 (en) Annular deformation correction method
EP2789705B1 (en) Machine part, rolling bearing, conical roller bearing and method for manufacturing machine part
EP1683876B1 (en) Method of manufacturing a bearing washer for thrust bearings and method of manufacturing a thrust bearing
JP2001187917A (en) Double row spherical roller bearing
JP4176501B2 (en) Method for heat treatment of annular member
US10393180B2 (en) Bearing ring for roller bearing, manufacturing method of bearing ring for roller bearing, and needle roller bearing
JP2008169941A (en) Wheel bearing device
JPH11140543A (en) Production of bearing ring
JP4810866B2 (en) Mold for heat treatment of bearing race and method of manufacturing bearing race
JP5050587B2 (en) Rolling bearing device for wheel support
JP2009270172A (en) Method for manufacturing bearing ring for rolling bearing
JP2007186760A (en) Manufacturing method of bearing ring for rolling bearing, and rolling bearing
JP2005226714A (en) Rolling part, rolling device using the same, and method of manufacturing the rolling part and the rolling device
JPH09329139A (en) Automatically aligning rolling bearing
JP2009203521A (en) Heat deformation straightening method of annular body, and its hardening method
JP2008106827A (en) Manufacturing method of outer ring for radial ball bearing
JP2006089795A (en) Rolling bearing race ring and its producing method, and rolling bearing

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: 20070306