JP3321228B2 - Method of manufacturing raceway for rolling bearing - Google Patents

Method of manufacturing raceway for rolling bearing

Info

Publication number
JP3321228B2
JP3321228B2 JP6084893A JP6084893A JP3321228B2 JP 3321228 B2 JP3321228 B2 JP 3321228B2 JP 6084893 A JP6084893 A JP 6084893A JP 6084893 A JP6084893 A JP 6084893A JP 3321228 B2 JP3321228 B2 JP 3321228B2
Authority
JP
Japan
Prior art keywords
rolling
ring
seal
raceway
bearing
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
Application number
JP6084893A
Other languages
Japanese (ja)
Other versions
JPH06246546A (en
Inventor
保徳 寺田
Original Assignee
エヌティエヌ株式会社
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 エヌティエヌ株式会社 filed Critical エヌティエヌ株式会社
Priority to JP6084893A priority Critical patent/JP3321228B2/en
Publication of JPH06246546A publication Critical patent/JPH06246546A/en
Application granted granted Critical
Publication of JP3321228B2 publication Critical patent/JP3321228B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F16C33/00Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30Parts of ball or roller bearings
    • F16C33/58Raceways; Race rings
    • F16C33/64Special methods of manufacture
    • 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
    • F16C19/02Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/04Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
    • F16C19/06Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【0001】[0001]
【産業上の利用分野】この発明は、シール付き深溝玉軸
受や他のシール付きの転がり軸受において、軌道輪とな
る内輪または外輪を製造する軌道輪製造方法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a raceway ring for manufacturing an inner ring or an outer ring as a raceway ring in a sealed deep groove ball bearing or other sealed rolling bearings .
【0002】[0002]
【従来の技術】従来、転がり軸受の軌道輪は、次の工程
で加工している。すなわち、冷間ローリング等により軌
道輪の素形状に鍛造した素材につき、 生旋削−熱処理−研削−超仕上げ の各工程を経て軌道輪を完成させている。前記の研削お
よび超仕上げの工程は、詳しくは次の工程となる。 a.外輪の場合 幅研削−外径センタレス研削−転走面研削−転走面超仕
上げ b.内輪の場合 幅研削−転走面研削−内径研削−転走面超仕上げ
2. Description of the Related Art Conventionally, bearing rings of rolling bearings are processed in the following steps. In other words, for a material forged into the basic shape of a raceway by cold rolling or the like, the raceway ring is completed through the steps of raw turning, heat treatment, grinding, and superfinishing. The grinding and superfinishing steps are specifically the following steps. a. For outer ring Width grinding-Outer diameter centerless grinding-Rolling surface grinding-Rolling surface super finish b. For inner ring Width grinding-rolling surface grinding-inner diameter grinding-rolling surface super finishing
【0003】[0003]
【発明が解決しようとする課題】このように、従来は研
削に多くの工程を必要とし、加工コストが高くついてい
る。また、シール付き軸受の場合、次のようにシール溝
につき高精度を得ることが難しいという問題点がある。
As described above, conventionally, many steps are required for grinding, and the processing cost is high. Further, in the case of a bearing with a seal, there is a problem that it is difficult to obtain high precision for the seal groove as described below.
【0004】すなわち、旋削した素材につき、熱処理過
程で歪が生じるため、後工程の研削時に、変形量の修
正、粗さ精度の向上、仕上がり寸法精度の向上等を図る
べく、前記のように各種の研削加工を実施している。し
かし、シール付深溝玉軸受等のように、シール溝を軌道
輪に設ける場合、シール溝については一般に熱処理後の
後加工が行われず、熱処理に伴う歪みが生じたままとな
っている。通常の軸受では、この程度のシール部の変形
を許容することができるが、高精度品、例えば低トルク
で回転高精度の軸受では、シールと軌道輪との接触によ
る回転抵抗の安定化のために、シール溝についても後加
工が必要になり、製造工程が非常に多くなる。また、グ
リース漏れ防止の確実のためにもシール溝の後加工が要
望される。さらに、雑音防止等のために、シール溝に残
る焼入れスケールの除去も必要となることがある。
That is, since the strained material is distorted in the heat treatment process, various kinds of deformation are required to correct the deformation, improve the roughness accuracy, improve the finished dimensional accuracy, and the like during the subsequent grinding. We are carrying out grinding. However, when a seal groove is provided in a race such as a deep groove ball bearing with a seal, the seal groove is generally not subjected to post-processing after heat treatment, and distortion due to heat treatment remains generated. Normal bearings can tolerate this degree of deformation of the seal, but for high-precision products, for example, low-torque, high-precision bearings, to stabilize rotational resistance due to contact between the seal and the race In addition, post-processing is required for the seal groove, and the number of manufacturing steps becomes extremely large. Further, post-processing of the seal groove is also required for ensuring prevention of grease leakage. Further, it may be necessary to remove the quenched scale remaining in the seal groove for noise prevention or the like.
【0005】この発明の目的は、転走面の研磨過程が簡
略化できて、製造コストの低下が図れ、またシール溝等
を設ける場合に、その加工が容易に行えて高品質化が図
れる転がり軸受の軌道輪製造方法を提供することであ
る。
SUMMARY OF THE INVENTION It is an object of the present invention to simplify the process of polishing the raceway surface, thereby reducing the manufacturing cost, and when providing a seal groove or the like, the rolling can be easily performed and high quality can be achieved. An object of the present invention is to provide a method for manufacturing a bearing race.
【0006】[0006]
【課題を解決するための手段】この発明の軌道輪製造方
法は、転がり軸受の軌道輪となる素材であって、ほぼ上
記軌道輪の形状となった素形状の素材を鍛造により得
て、上記素形状の素材につき、表面硬化のための熱処理
を加熱炉で行った後に、転走面およびシール溝を所望の
形状に旋削する方法である。旋削後に転走面を砥石で超
仕上げする。
According to a method of manufacturing a bearing ring of the present invention, a raw material having a shape substantially equal to the shape of the above-mentioned raceway is obtained by forging a material which will be a raceway of a rolling bearing. Heat treatment for surface hardening of raw material
The following were Tsu line in a heating furnace, a rolling surface and a method of turning the seal groove to a desired shape. After turning , the rolling surface is superimposed with a whetstone
To finish .
【0007】[0007]
【作用】この方法によると、熱処理後に切削を行うた
め、素材の熱処理変形を切削過程で除去することができ
る。そのため、切削時に高精度に加工しておくことによ
り、後の研磨工程が簡素化でき、例えば転走面につき研
削工程を省略して直接に超仕上げを行うことができる。
また、軌道輪にシール溝を設ける場合に、前記の熱処理
後の切削過程で転走面と同時にシール溝も加工すること
ができる。そのため、シール溝の熱処理変形も除去で
き、またシール溝に付着した焼入スケール等の除去も行
える。さらに、同時加工となるため、転走面とシール溝
の同心度が高精度に維持される。これらのため、グリー
ス漏れの防止やシール抵抗の低減につながる。
According to this method, since the cutting is performed after the heat treatment, the heat-treated deformation of the material can be removed in the cutting process. Therefore, by performing processing with high precision at the time of cutting, the subsequent polishing process can be simplified, and for example, super finishing can be performed directly without omitting the grinding process on the rolling surface.
Further, when a seal groove is provided in the race, the seal groove can be formed simultaneously with the rolling surface in the cutting process after the heat treatment. Therefore, heat treatment deformation of the seal groove can be removed, and quenched scale and the like attached to the seal groove can also be removed. Further, since the machining is performed simultaneously, the concentricity between the rolling surface and the seal groove is maintained with high accuracy. For these reasons, grease leakage is prevented and seal resistance is reduced.
【0008】[0008]
【実施例】この発明の一実施例を図1ないし図3に基づ
いて説明する。図3は、この実施例の製造方法により軌
道輪である外輪1と内輪2とを加工する軸受を示す。こ
の軸受はシール付き深溝玉軸受であり、内輪2と外輪1
の間に、保持器3に保持された転動体4が介在され、両
面にシール5,5が設けられる。シール5は心金入りの
ゴム材等からなる。外輪1は、内径面に円弧溝からなる
転走面1aと、シール5の外径部を嵌合状態に取付ける
円弧状断面のシール溝1bとが加工される。内輪2は、
外径面に円弧溝からなる転走面2aと、シール5の内径
部を摺接させる平坦な底面のシール溝2bとが加工され
る。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. FIG. 3 shows a bearing for processing the outer ring 1 and the inner ring 2 which are the race rings by the manufacturing method of this embodiment. This bearing is a sealed deep groove ball bearing, and has inner ring 2 and outer ring 1
The rolling element 4 held by the retainer 3 is interposed between them, and seals 5 and 5 are provided on both surfaces. The seal 5 is made of a rubber material containing a mandrel. The outer race 1 is formed with a rolling surface 1a formed of an arc groove on the inner diameter surface and a seal groove 1b having an arc-shaped cross section for mounting the outer diameter portion of the seal 5 in a fitted state. Inner ring 2
A rolling surface 2a formed of an arc groove on the outer diameter surface and a flat bottom seal groove 2b for slidingly contacting the inner diameter portion of the seal 5 are formed.
【0009】図1は外輪1の製造過程を示す。まず、同
図(A)に示すように、ほぼ外輪1の形状となった素形
状の外輪素材W1を、冷間ローリング等の鍛造により得
る。この素材W1を、加熱炉6で焼入して表面硬化させ
た後(B)、幅研削(C)、および外径研削(D)を行
う。つぎに、この外径研削された素材W1を旋削し、転
走面1aおよびシール溝1bを所望の形状に加工する
(E)。同図の破線cは、旋削前の素材W1の内径面形
状を示す。この旋削は焼入鋼切削となるため、このよう
な切削が可能なバイトを使用する。焼入鋼切削の可能な
バイトとして、例えばCBN(立方晶窒化硼素)に特殊
セラミックス結合材を加えた焼結体工具等が市販されて
いる。最後に、転走面1aを砥石7で超仕上げ(F)し
て、素材W1が外輪1として完成する。
FIG. 1 shows a manufacturing process of the outer race 1. First, as shown in FIG. 1A, an outer race material W1 having a substantially shape of the outer race 1 is obtained by forging such as cold rolling. After the material W1 is quenched in the heating furnace 6 to harden the surface (B), width grinding (C) and outer diameter grinding (D) are performed. Next, the material W1 having the outer diameter ground is turned to process the rolling surface 1a and the seal groove 1b into desired shapes (E). A dashed line c in the figure shows the inner diameter surface shape of the raw material W1 before turning. Since this turning is hardened steel cutting, a cutting tool capable of such cutting is used. As a cutting tool capable of cutting hardened steel, for example, a sintered tool obtained by adding a special ceramic binder to CBN (cubic boron nitride) is commercially available. Finally, the rolling surface 1a is super-finished (F) with the grindstone 7, and the material W1 is completed as the outer ring 1.
【0010】図2は内輪2の製造過程を示す。まず、同
図(A)に示すように、ほぼ内輪2の形状となった素形
状の内輪素材W2を、冷間ローリング等の鍛造により得
る。この素材W2を、加熱炉6で焼入して表面硬化させ
た後(B)、幅研削(C)を行う。つぎに、この幅研削
された素材W2を旋削し、転走面2aおよびシール溝2
bを所望の形状に加工する(D)。同図の破線dは、旋
削前の素材W2の外径面形状を示す。この旋削も焼入鋼
切削となる。この切削された素材W2に、内径研削
(E)、および転走面2aの砥石8による超仕上げ加工
を施すことにより、内輪2として完成する。
FIG. 2 shows a manufacturing process of the inner ring 2. First, as shown in FIG. 1A, an inner race material W2 having a substantially shape of the inner race 2 is obtained by forging such as cold rolling. After the material W2 is quenched in the heating furnace 6 to harden the surface (B), width grinding (C) is performed. Next, the material W2 whose width has been ground is turned, and the rolling surface 2a and the seal groove 2 are turned.
b is processed into a desired shape (D). A dashed line d in the figure shows the outer diameter surface shape of the blank W2 before turning. This turning is also hardened steel cutting. The inner ring 2 is completed by subjecting the cut material W2 to inner diameter grinding (E) and superfinishing of the rolling surface 2a with a grindstone 8.
【0011】この軌道輪製造方法によると、外輪素材W
1および内輪素材W2は、いずれも焼入後に切削を行う
ため、素材W1,W2の熱処理変形を切削過程で除去す
ることができる。そのため、切削時に高精度に加工して
おくことにより、後の転走面研削工程を省略し、直接に
転走面1a、2aの超仕上げを行うことができる。この
ため、工程が簡略化されて加工コストが低減する。
According to this method for manufacturing a raceway, the outer race material W
1 and the inner ring material W2 are both cut after quenching, so that heat treatment deformation of the materials W1 and W2 can be removed in the cutting process. Therefore, by performing high-precision machining at the time of cutting, the subsequent rolling surface grinding step can be omitted, and the rolling surfaces 1a and 2a can be directly super-finished. For this reason, the process is simplified and the processing cost is reduced.
【0012】また、前記の焼入後の切削過程で転走面1
a,2aと同時にシール溝1b,2bも加工するため、
シール溝1b,2bについても熱処理変形が除去できて
高い真円度が得られる。また、シール溝1b,2bに付
着した焼入スケールの除去も行える。さらに、同時加工
となるため、転走面1a,2aとシール溝1b,2bの
同心度を高精度に維持できる。これらのため、グリース
漏れが少なく、かつシール接触抵抗の小さい低トルク軸
受とすることができる。さらに、シール溝1b,2bに
焼入スケールの付着のない清浄な音響良好品とすること
ができる。
In the cutting process after the quenching, the rolling surface 1
In order to process the seal grooves 1b and 2b simultaneously with a and 2a,
The heat treatment deformation of the seal grooves 1b and 2b can also be removed, and high roundness can be obtained. Further, the quenched scale attached to the seal grooves 1b and 2b can be removed. Further, since the machining is performed simultaneously, the concentricity between the rolling surfaces 1a and 2a and the seal grooves 1b and 2b can be maintained with high accuracy. For these reasons, a low-torque bearing with little grease leakage and small seal contact resistance can be obtained. Further, it is possible to obtain a clean sound good product having no quenched scale adhered to the seal grooves 1b and 2b.
【0013】図4は、シール付き深溝玉軸受の他の例を
示す。この例では、シール9は金属板で形成されて内輪
2のシール溝2b′に取付けられ、外輪1のシール溝1
b′との間にラビリンスシールを構成する。その他の構
成は図3の例と同様である。この構成の場合にも、図
1,図2と共に示した軌道輪製造方法で外輪1および内
輪2の製造が行える。
FIG. 4 shows another example of a deep groove ball bearing with a seal. In this example, the seal 9 is formed of a metal plate and attached to the seal groove 2 b ′ of the inner race 2, and the seal 9 is formed of a metal plate.
A labyrinth seal is formed between the labyrinth seal and b ′. Other configurations are the same as those in the example of FIG. Also in the case of this configuration, the outer ring 1 and the inner ring 2 can be manufactured by the raceway ring manufacturing method shown in conjunction with FIGS.
【0014】なお、前記各実施例はシール付き深溝玉軸
受に適用した場合につき説明したが、この発明は円すい
ころ軸受や円筒ころ軸受等、シール付きの軸受であれ
ば、転がり軸受一般に適用できる。また、保持器を軌道
輪(内輪または外輪)に案内させる軸受の場合において
も、軌道輪の案内面が切削により精度良く加工されてい
るので、保持器の摺接面が摩耗したり、潤滑不良という
ことが低減できる。
Although the above embodiments have been described in connection with the case where the present invention is applied to a deep groove ball bearing with a seal, the present invention is applicable to any bearing with a seal such as a tapered roller bearing or a cylindrical roller bearing.
If, cut in applied to the bearing generally shy rolling. Also, in the case of a bearing that guides the cage to the raceway (inner or outer ring), since the guide surface of the raceway is precisely machined by cutting, the sliding contact surface of the cage is worn or lubrication is poor. That can be reduced.
【0015】[0015]
【発明の効果】この発明の軌道輪製造方法は、素形状の
素材を熱処理した後に切削を行うため、素材の熱処理変
形を切削過程で除去することができる。そのため転走面
につき、後の研磨工程が簡素化でき、例えば研削工程を
省略して直接に超仕上げを行うこと等により加工コスト
の低減が図れる。また、軌道輪にシール溝を加工する場
合に、熱処理後の切削過程で転走面と同時にシール溝を
加工することができ、これにより熱処理変形がなくて真
円度が良く、かつ転走面に対する同心度の高いシール溝
が得られる。そのため、グリース漏れが少なく、かつシ
ール接触抵抗の小さい低トルク軸受とすることができ
る。さらに、シール溝部分等に焼入スケールの付着のな
い清浄な音響良好品とすることができる。
According to the method for manufacturing a bearing ring of the present invention, since the cutting is performed after heat-treating the raw material, the heat-treated deformation of the material can be removed in the cutting process. Therefore, the subsequent polishing process for the rolling surface can be simplified, and the processing cost can be reduced by, for example, directly performing super finishing without the grinding process. Also, when machining the seal groove on the raceway, the seal groove can be machined simultaneously with the rolling surface in the cutting process after the heat treatment, so that the heat treatment is not deformed, the roundness is good, and the rolling surface is improved. Seal groove having a high concentricity with respect to. Therefore, a low-torque bearing with little grease leakage and small seal contact resistance can be obtained. Further, it is possible to obtain a clean sound good product having no quenched scale adhered to the seal groove and the like.
【図面の簡単な説明】[Brief description of the drawings]
【図1】この発明の一実施例にかかる軌道輪製造方法に
おける外輪製造過程の工程説明図である。
FIG. 1 is a process explanatory view of an outer ring manufacturing process in a raceway ring manufacturing method according to one embodiment of the present invention.
【図2】同軌道輪製造方法における内輪製造過程の工程
説明図である。
FIG. 2 is an explanatory diagram of a process of an inner ring manufacturing process in the method of manufacturing a raceway ring.
【図3】同製造方法で製造した内外輪を使用する軸受の
部分断面図である。
FIG. 3 is a partial cross-sectional view of a bearing using the inner and outer rings manufactured by the same manufacturing method.
【図4】同製造方法の適用が可能な他の軸受の部分断面
図である。
FIG. 4 is a partial sectional view of another bearing to which the manufacturing method can be applied.
【符号の説明】[Explanation of symbols]
1…外輪(軌道輪)、1a…転走面、1b…シール溝、
2…内輪(軌道輪)、2a…転走面、2b…シール溝、
W1…外輪素材、W2…内輪素材
DESCRIPTION OF SYMBOLS 1 ... Outer ring (track ring), 1a ... Rolling surface, 1b ... Seal groove,
2 ... inner ring (track ring), 2a ... rolling surface, 2b ... seal groove,
W1: Outer ring material, W2: Inner ring material

Claims (1)

    (57)【特許請求の範囲】(57) [Claims]
  1. 【請求項1】 転がり軸受の軌道輪となる素材であっ
    て、ほぼ上記軌道輪の形状となった素形状の素材を鍛造
    により得る過程と、上記素形状の素材を加熱炉で熱処理
    により表面硬化させる過程と、この熱処理させた素材を
    旋削して転走面およびシール溝を所望の形状に加工する
    過程と、この旋削した素材の転走面を砥石で超仕上げ
    る過程とを含む転がり軸受の軌道輪製造方法。
    1. A process of obtaining, by forging, a raw material that becomes a raceway of a rolling bearing and substantially has the shape of the raceway, and hardening the surface of the raw material by heat treatment in a heating furnace. A process of turning the heat-treated material to form a rolling surface and a seal groove into a desired shape, and a process of super-finishing the rolling surface of the turned material with a grindstone. And a method of manufacturing a bearing ring for a rolling bearing.
JP6084893A 1993-02-24 1993-02-24 Method of manufacturing raceway for rolling bearing Expired - Lifetime JP3321228B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6084893A JP3321228B2 (en) 1993-02-24 1993-02-24 Method of manufacturing raceway for rolling bearing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6084893A JP3321228B2 (en) 1993-02-24 1993-02-24 Method of manufacturing raceway for rolling bearing

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JPH06246546A JPH06246546A (en) 1994-09-06
JP3321228B2 true JP3321228B2 (en) 2002-09-03

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