JPH0617823A - Bearing for revolving seat and its manufacture - Google Patents
Bearing for revolving seat and its manufactureInfo
- Publication number
- JPH0617823A JPH0617823A JP4197646A JP19764692A JPH0617823A JP H0617823 A JPH0617823 A JP H0617823A JP 4197646 A JP4197646 A JP 4197646A JP 19764692 A JP19764692 A JP 19764692A JP H0617823 A JPH0617823 A JP H0617823A
- Authority
- JP
- Japan
- Prior art keywords
- bearing
- rolling
- rolling surface
- hole
- quenching
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Rolling Contact Bearings (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、建設機械や大型機械に
使用される旋回座用軸受とその製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slewing bearing for use in construction machines and large machines and a method for manufacturing the bearing.
【０００２】[0002]
【従来の技術】旋回座用軸受、通称ターンテーブル軸受
は、１個の軸受で、アキシャル荷重、モーメント荷重及
びラジアル荷重を受ける構造とされ、軌道輪の内輪また
は外輪には旋回用歯車を備え、また軌道輪自体に固定用
取付穴が設けられている。用途によって、大荷重を支持
する軸受や、特に精度と剛性が要求される軸受がある。2. Description of the Prior Art A bearing for a slewing seat, commonly called a turntable bearing, is a single bearing and is structured to receive an axial load, a moment load and a radial load, and an inner ring or an outer ring of a bearing ring is provided with a slewing gear. Further, the bearing ring itself is provided with a fixing mounting hole. Depending on the application, there are bearings that support large loads, and bearings that require particularly high precision and rigidity.
【０００３】旋回座用軸受の軌道輪は、大径のもので
は、構造用炭素鋼又は構造用合金鋼（ＳＣＭ４４０、Ｓ
ＣＭ４４５など）が使用され、転走面は高周波焼入れ・
焼戻しにより表面硬化層を備えて、耐摩耗性が付与され
ている。If the bearing ring for the swivel bearing has a large diameter, it may be structural carbon steel or structural alloy steel (SCM440, SCM).
(CM445 etc.) is used and the rolling surface is induction hardened.
A tempered surface layer is provided by tempering to impart wear resistance.
【０００４】高周波焼入れは、単一の高周波コイルを転
走面に全周に均等に近接させて、一回の高周波誘導によ
って加熱されることが、転走面硬化層の均質化のために
は望ましいが、他方、軌道輪の寸法形状が変わるごとに
専用の高周波コイルを準備しなければならず、また、高
周波発振器に高出力を必要とする。そこで、大径の軌道
輪では、小コイルを転走面に近接させて、通常は軌道輪
を一定速度で回転させた状態で誘導加熱を行い、転走面
上の連続移動する誘導加熱部位にコイル通過直後に注水
急冷する方法が採用されている。In induction hardening, a single high-frequency coil is uniformly approached to the rolling surface all around and is heated by one high-frequency induction. On the other hand, it is desirable, but on the other hand, each time the size and shape of the bearing ring changes, a dedicated high-frequency coil must be prepared, and the high-frequency oscillator requires high output. Therefore, for large diameter raceways, small coils are placed close to the raceway surface, and induction heating is usually performed while the raceway wheel is rotating at a constant speed. A method of quenching water immediately after passing through the coil is adopted.
【０００５】この移動焼入れにおいては、転走面上の既
に焼入れした部分を再度加熱焼入れして焼入れ部位が重
複すると、重複部位に焼割れを生じたり、再加熱による
軟質部が生じて耐摩耗性が低下する。そこで、従来は、
転走面に焼入れ始端部と終端部との間に未焼入れ部を残
して軟質のままとしていた。In this moving quenching, if the already hardened portion on the rolling surface is heated and hardened again and the hardened portions overlap, quenching cracks occur in the duplicated portions or soft portions due to reheating occur to cause wear resistance. Is reduced. So, conventionally,
An unquenched part was left on the rolling surface between the hardened start end and the hardened end, and the softness remained.
【０００６】旋回座用軸受には、図４に示すように、外
輪１及び内輪２の転走面１２，２２の断面形状が共に半
円状をなす単列玉軸受が、アキシャル荷重とともにラジ
アル荷重を受けることができ、構造が単純であることか
ら広く使用されている。この型式の玉軸受は、内輪２又
は外輪１に、転走面を含む周面に開口する通孔を設け、
軸受組立時には、内輪２と外輪１とを配置して、転走面
１２，２２が対向して形成される転走溝内に、上記通孔
より玉３を装入し、通孔に施栓をしていた。As the bearing for the swivel seat, as shown in FIG. 4, a single row ball bearing in which the rolling surfaces 12, 22 of the outer ring 1 and the inner ring 2 are semicircular in cross section is used. It is widely used due to its simple structure. In this type of ball bearing, the inner ring 2 or the outer ring 1 is provided with through holes that open to the peripheral surface including the rolling surface,
At the time of assembling the bearing, the inner ring 2 and the outer ring 1 are arranged, and the balls 3 are inserted through the through holes into the rolling grooves formed by the rolling surfaces 12 and 22 facing each other, and the through holes are plugged. Was.
【０００７】施栓は、一端面に転走面と同一形状の凹曲
面を設け、他端側にはピン止め孔を設けた鋼製の栓体を
当該通孔に嵌挿して、軌道輪の側面より当該止め孔にテ
ーパーピンを嵌入して、栓体の外れ・回転を防止してい
た。The stopper has a concave curved surface having the same shape as the rolling surface at one end and a pin stopper hole at the other end, and a steel stopper is fitted into the through hole to form a side surface of the race. Further, a taper pin was fitted into the stop hole to prevent the stopper from coming off and rotating.
【０００８】[0008]
【発明が解決しようとする課題】軌道輪の転走面の移動
焼入れに伴う未焼入れの軟質部は、耐摩耗性が低いた
め、旋回座用軸受として転走面上の負荷域に制限を生
じ、負荷が転走面全周にわたる様な軸受用途では、使用
中に摩耗し易い。Since the unhardened soft portion of the rolling contact surface of the bearing ring is hard to wear, the bearing area for the swivel seat has a limited load range on the rolling contact surface. In bearing applications where the load is around the entire rolling surface, it tends to wear during use.
【０００９】また、上記の栓体は、玉転動体の装入後の
通孔施栓の際には、テーパーピンによる栓体の固定のた
めに機械加工を要するので、栓体端面がなす転走面は軟
質のままであり、上述同様の耐摩耗性の難点を有してい
た。In addition, since the above plug body requires machining to fix the plug body by the taper pin when plugging the through hole after loading the ball rolling element, the rolling of the end surface of the plug body is performed. The surface remained soft and had the same problem of abrasion resistance as described above.
【００１０】本発明は、高周波移動加熱による焼入れに
伴って生じる大径の旋回座用軸受固有の転走面軟質部を
解消して、転走面を均質な焼入れ硬化面とし、耐摩耗性
と旋回精度にすぐれた旋回座用軸受とその製造方法を提
供しようとするものである。The present invention eliminates the soft portion of the rolling contact surface, which is peculiar to the bearing for swivel seats and has a uniform quench-hardened surface, which is caused by quenching by high-frequency moving heating, and makes the rolling contact surface wear-resistant. An object of the present invention is to provide a bearing for a swivel seat having excellent swivel accuracy and a manufacturing method thereof.
【００１１】[0011]
【課題を解決するための手段】本発明の旋回座用軸受
は、軌道輪の転走面に高周波加熱の移動焼入れによる表
面硬化層を備えた旋回座用軸受であるが、当該軌道輪
は、転走面を有する周面に転走面を切断した開口部を有
して軌道輪半径方向に穿孔された栓孔と、当該栓孔の開
口部を移動焼入れの始端及び終端とした当該表面硬化層
と、一端面に焼入れ硬化した凹曲面を備えて当該栓孔に
挿嵌固定された栓体と、を具備し、当該凹曲面をもって
転走面となして、転走面全周にわたって均一な表面硬化
層を備えたことを特徴とするものである。A bearing for a slewing seat of the present invention is a bearing for a slewing bearing, in which a rolling surface of the bearing ring is provided with a surface hardened layer by moving and quenching by high frequency heating. A plug hole having an opening formed by cutting the rolling surface on the circumferential surface having a rolling surface and being bored in the radial direction of the bearing ring, and the surface hardening having the opening of the plug hole as the start end and the end of the moving hardening. A layer and a plug body having a concave curved surface hardened and hardened at one end surface and fitted and fixed in the plug hole. The concave curved surface serves as a rolling surface and is uniform over the entire rolling surface. It is characterized by having a surface-hardened layer.
【００１２】旋回座用軸受は、特に、当該栓孔を軌道輪
の半径方向に当該軌道輪を貫通して穿孔し、内輪転走面
と外輪転走面とが対向して形成する転走溝に玉を装入す
る装入用通孔としたものが採用される。In the bearing for swivel seat, particularly, the plug hole is formed by penetrating the bearing ring in the radial direction of the bearing ring so that the inner raceway surface and the outer raceway surface are opposed to each other. The one with a through hole for charging balls is adopted.
【００１３】また、その製造方法について、当該軌道輪
に転走面を形成する工程と、当該転走面幅より大径の開
口部が当該転走面を切断するように軌道輪半径方向に栓
孔を穿孔する工程と、ついで当該開口部を始端として高
周波コイルによる加熱部を当該転走面に連続移動させて
当該開口部を終端とする移動焼入れ工程と、別途に栓体
の一端面に凹曲面を形成して焼入れ硬化層を形成する工
程と、当該栓体を当該穿孔に挿嵌して固定する工程と、
から成り、当該凹曲面をもって転走面となして、転走面
全周にわたって均一な表面硬化層を備えたことを特徴と
している。Further, in the manufacturing method thereof, a step of forming a rolling contact surface on the raceway ring and a plug in the radial direction of the raceway ring so that an opening having a diameter larger than the width of the raceway surface cuts the rolling contact surface. A step of boring a hole, then a moving and quenching step of continuously moving the heating part by the high-frequency coil to the rolling surface starting from the opening and terminating at the opening, and separately forming a recess on one end surface of the plug body. A step of forming a curved surface to form a quench-hardened layer, a step of inserting and fixing the plug into the hole,
It is characterized in that the concave curved surface serves as a rolling surface and a uniform surface hardening layer is provided over the entire circumference of the rolling surface.
【００１４】[0014]
【実施例】本発明の旋回座用軸受の実施例を図面により
以下に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a bearing for a swivel seat according to the present invention will be described below with reference to the drawings.
【００１５】旋回座用軸受は、図４に示した単列玉軸受
で、内輪２の内側に歯車２５を備えた形式のものであっ
て、構造用炭素鋼、例えばＳ５５Ｃ材により、又は、構
造用低合金鋼、例えばＳＣＭ４４０材、ＳＣＭ４４５材
などにより、リング状に鍛造して、内輪２及び外輪１を
成形する。The bearing for the swivel seat is the single row ball bearing shown in FIG. 4, and is of a type having a gear 25 inside the inner ring 2, and is made of structural carbon steel, for example, S55C material, or A low alloy steel for use, for example, SCM440 material, SCM445 material, etc. are forged into a ring shape to form the inner ring 2 and the outer ring 1.
【００１６】図１は、外輪１の内周面１１を見た部分斜
視図であるが、外輪１の内周面１１には、外輪縦断面上
にほぼ半円形を成す転走面１２が旋削形成され、また、
転走面１２の幅より直径の大きい円形の開口部４０を有
する通孔４が、内周面１１から外周面１５にわたって外
輪１本体を貫通して設けられて、当該開口部４０が転走
面１２を切断している。FIG. 1 is a partial perspective view of the inner peripheral surface 11 of the outer ring 1. The inner peripheral surface 11 of the outer ring 1 is provided with a rolling surface 12 having a substantially semicircular cross section on the longitudinal section of the outer ring. Formed and also
A through hole 4 having a circular opening 40 having a diameter larger than the width of the rolling surface 12 is provided so as to penetrate the outer ring 1 main body from the inner peripheral surface 11 to the outer peripheral surface 15, and the opening 40 is the rolling surface. 12 is cut.
【００１７】内周面１１の転走面１２の焼入れ処理にお
いては、小型の高周波コイル（不図示）と注水管（不図
示）とを内周面１１に近接させて、外輪１を回転装置
（不図示）により回転させながら高周波誘導加熱と加熱
直後の注水により、転走面１２に全周にわたって高周波
焼入れを行なう。In quenching the rolling surface 12 of the inner peripheral surface 11, a small high-frequency coil (not shown) and a water injection pipe (not shown) are brought close to the inner peripheral surface 11 to rotate the outer ring 1 ( The rolling surface 12 is induction-hardened over the entire circumference by high-frequency induction heating and water injection immediately after heating while rotating by (not shown).
【００１８】この高周波焼入れにおいて、転走面１２の
焼入れ加熱開始の始端を上記通孔４の開口部４０外縁９
１として、高周波誘導加熱部を内周面１１の転走面１２
上を周回させ、焼入れ加熱の終端を当該通孔４の開口部
４０の他方の外縁９２とする。In this induction hardening, the start of quenching and heating of the rolling contact surface 12 is the outer edge 9 of the opening 40 of the through hole 4.
1, the high frequency induction heating part is the rolling surface 12 of the inner peripheral surface 11.
The upper part is circulated, and the end of the quenching heating is made the other outer edge 92 of the opening 40 of the through hole 4.
【００１９】このように、高周波加熱の始端９１と終端
９２を、外輪１に貫通する通孔４の開口部４０の周縁９
１，９２とするので、転走面１２上には、高周波加熱の
始端と終端が重複する部分が存在せず、また始端と終端
との間の未焼入れ部も形成されない。残余の転走面１２
は均質な焼入れ硬化面９となる。As described above, the peripheral edge 9 of the opening 40 of the through hole 4 penetrating the outer ring 1 at the start end 91 and the end end 92 of the high frequency heating.
Since it is 1, 92, there is no portion on the rolling surface 12 where the start and end of high frequency heating overlap, and no unquenched portion between the start and end is formed. Remaining rolling surface 12
Results in a uniform quench hardened surface 9.
【００２０】高周波焼入れ後は、焼戻しをおこなって、
焼入れ残留応力の一部を解放して靱性を高め、ロックウ
ェルＣ硬度ＨRC５５〜６０程度に調整し、転走面１２の
精密研摩を行なう。After induction hardening, tempering is performed,
Enhanced toughness to release a portion of the quenching residual stress was adjusted to about Rockwell C hardness H RC 55 to 60, the rolling is performed precision polishing of contact surface 12.
【００２１】内輪２についても、外周面２１の転走面２
２に同様の高周波焼入れを行なうが、内輪には内周に歯
車２５が刻設されているので、転走面２２に開口する孔
は通孔とせず、内輪本体内部で閉止された閉塞孔とする
点が異なる。As for the inner ring 2, the rolling surface 2 of the outer peripheral surface 21
2 is similarly induction hardened, but since the inner ring has a gear 25 engraved on its inner periphery, the hole that opens on the rolling surface 22 is not a through hole, but a closed hole that is closed inside the inner ring body. The point is different.
【００２２】図２（Ａ）は、内輪２の外周面２１に開孔
する上記閉塞孔４１に施栓した内輪部分断面図である。
施栓のための栓体５は構造用炭素鋼Ｓ５５Ｃ又は構造用
合金鋼ＳＣＭ４４０材等で形成され、図２（Ｂ，Ｃ）に
示すように外周が閉塞孔４１の内周に嵌合する外径寸法
を有し、一端には内輪２１の転走面２２と同一断面形状
の半円筒状凹曲面５２が形成され、他端側にはテーパー
状のピン孔６１が設けられている。当該凹曲面５２には
高周波焼入れによる硬化層９が設けられている。硬化層
９は、高周波焼入れ後に焼戻しを行い、転走面の表面硬
度と同程度のＨRC５５〜６０の表面硬度に調製される。
この栓体５を内輪２の閉塞孔４１に挿嵌して、テーパー
ピン６を内輪２の側面よりピン孔６１、６１に挿入し
て、栓体５を固定すれば、栓体５の凹曲面５２が外周面
２１の転走面２２と連続面をなして、玉３の荷重を支持
する転走面２２’となる。FIG. 2A is a partial cross-sectional view of the inner ring 2 plugged in the closed hole 41 formed in the outer peripheral surface 21 of the inner ring 2.
The plug body 5 for plugging is made of structural carbon steel S55C or structural alloy steel SCM440, etc., and has an outer diameter that fits the inner circumference of the closed hole 41 as shown in FIGS. 2B and 2C. A semi-cylindrical concave curved surface 52 having a size and the same cross-sectional shape as the rolling surface 22 of the inner ring 21 is formed at one end, and a tapered pin hole 61 is provided at the other end side. A hardened layer 9 formed by induction hardening is provided on the concave curved surface 52. Hardened layer 9 performs tempered after induction hardening, is prepared on the rolling surface hardness and surface hardness of the comparable H RC 55 to 60 of the contact surface.
The plug body 5 is inserted into the closing hole 41 of the inner ring 2, the taper pin 6 is inserted into the pin holes 61, 61 from the side surface of the inner ring 2, and the plug body 5 is fixed. 52 forms a continuous surface with the rolling contact surface 22 of the outer peripheral surface 21 and becomes a rolling contact surface 22 'that supports the load of the balls 3.
【００２３】図３は、図１に示した外輪１の上記通孔４
に施栓されて組み立てた軸受の断面図を示している。外
輪１の通孔４は、軸受組立の際の玉３及び可撓性の間座
（保持器）（不図示）の転走溝１２、２２への装入孔と
して利用され、玉３装入後は、図２と同様の要領で、栓
体５が通孔４の外周面側開口部から挿嵌され、テーパー
ピン６により外輪１に固定されて、栓体５の焼入れ硬化
された半円状凹曲面５２が硬化した転走面１２’として
利用される。FIG. 3 shows the through hole 4 of the outer ring 1 shown in FIG.
Fig. 3 shows a sectional view of the bearing assembled by being plugged in. The through hole 4 of the outer ring 1 is used as a loading hole into the rolling grooves 12 and 22 of the ball 3 and the flexible spacer (retainer) (not shown) at the time of bearing assembly. After that, in the same manner as in FIG. 2, the stopper 5 is inserted from the outer peripheral surface side opening of the through hole 4, fixed to the outer ring 1 by the taper pin 6, and the quenching-hardened semicircle of the stopper 5 is completed. The concave concave surface 52 is used as the hardened rolling surface 12 '.
【００２４】本実施例においては、内歯型旋回座用軸受
を例示したが、外歯型軸受にも同様に実施され、その場
合には歯車を有しない内輪に玉装入用通孔が設けられ
る。In the present embodiment, the bearing for the internal tooth type swivel seat has been exemplified, but the same is applied to the external tooth type bearing, in which case a ball charging through hole is provided in the inner ring having no gear. To be
【００２５】栓体５の焼入れ処理に関して、実施例は、
凹曲面５２に高周波焼入れするものを示したが、他の方
法としては、栓体５全体を一体焼入れ（ずぶ焼入れ）し
たもの、又は全体加熱後の凹曲面５２にのみ注水焼入れ
したものも適宜採用される。Regarding the quenching treatment of the plug body 5, the embodiment is as follows.
The concave curved surface 52 is shown as being induction hardened, but as another method, one in which the entire plug body 5 is integrally hardened (deep quenching) or one in which only the concave curved surface 52 after total heating is water quenched is also adopted as appropriate. To be done.
【００２６】本実施例では、転走面１２、２２を含む軌
道輪周面に通孔・閉塞孔４を設けて後、当該孔を起点と
して、高周波焼入れの始端と終端を定めたが、本例に限
らず、先に高周波移動加熱焼入れを実施して後、その始
端と終端との間の僅かな未焼入れ部を切断開口する通孔
を設けてもよい。In the present embodiment, after the through hole / closed hole 4 is provided in the circumferential surface of the raceway ring including the rolling surfaces 12 and 22, the start end and the end of the induction hardening are defined with the hole as a starting point. Not limited to the example, after conducting induction heating heating and quenching first, a through hole may be provided for cutting and opening a slight unquenched portion between the start end and the end thereof.
【００２７】[0027]
【発明の効果】本発明の旋回座軸受は、高周波焼入れ法
が転走面固方向への移動焼入れでありながら、転走面は
全周に亘って、均質な表面硬化層を具えて、耐摩耗性に
優れているから、転走面全域を高負荷面とする用途に広
く使用でき、旋回精度の向上に有用である。EFFECTS OF THE INVENTION The swivel bearing of the present invention has a uniform surface hardening layer over the entire circumference of the rolling contact surface, even though the induction hardening method is moving hardening in the rolling surface solid direction. Since it has excellent wear resistance, it can be widely used for applications where the entire rolling surface is a high load surface, and is useful for improving turning accuracy.
【００２８】また、高周波焼入れ時には、大径高周波コ
イルによる加熱法は必要でなく、小出力高周波発振器と
小径高周波コイルとによって、多種・多様の大径軸受の
焼入れ処理が可能で、誘導加熱装置の汎用化と製造コス
ト低減に有効である。Further, at the time of induction hardening, a heating method using a large diameter high frequency coil is not required, and a small output high frequency oscillator and a small diameter high frequency coil can be used to quench various types of large diameter bearings. It is effective for generalization and reduction of manufacturing cost.
【図１】旋回座用軸受の外輪内周面側の部分斜視図。FIG. 1 is a partial perspective view of a bearing for a swivel seat on an inner peripheral surface side of an outer ring.
【図２】内歯型軸受の内輪の栓体施栓部断面図（Ａ）、
栓体の断面図（Ｂ）と同正面図（Ｃ）。FIG. 2 is a cross-sectional view (A) of a plug body plugging portion of an inner ring of an internal gear bearing.
Sectional drawing (B) and the same front view (C) of a stopper.
【図３】外輪に栓体施栓部を有する旋回座用軸受の断面
図（Ａ）、栓体の断面図（Ｂ）と同正面図（Ｃ）。FIG. 3 is a cross-sectional view (A) of a bearing for a swivel seat having a plug plug portion on an outer ring, a cross-sectional view (B) and a front view (C) of the plug body.
【図４】旋回座用玉軸受の部分断面図。FIG. 4 is a partial cross-sectional view of a ball bearing for swivel seat.
１ 外輪 １２ 外輪転走面 ２ 内輪 ２２ 内輪転走面 ３ 玉 ４ 栓孔 ５ 栓体 ６ テーパーピン ９ 焼入れ硬化層 1 Outer ring 12 Outer ring rolling surface 2 Inner ring 22 Inner ring rolling surface 3 Ball 4 Plug hole 5 Plug 6 Taper pin 9 Hardened layer
Claims (4)
れによる表面硬化層を備えた旋回座用軸受において、 当該軌道輪は、転走面を有する周面に転走面を切断した
開口部を有して軌道輪半径方向に穿孔された栓孔と、当
該栓孔の開口部を移動焼入れの始端及び終端とした当該
表面硬化層と、一端面に焼入れ硬化した凹曲面を備えて
当該栓孔に挿嵌固定された栓体と、を具備し、当該凹曲
面をもって転走面となして、転走面全周にわたって表面
硬化層を備えたことを特徴とする旋回座用軸受。1. A bearing for swivel seat, wherein the raceway surface of the raceway ring has a surface-hardened layer formed by moving and quenching by high frequency heating. A hole having a portion bored in the radial direction of the raceway, the surface-hardened layer with the opening of the hole being the start and end of the moving quench, and a concave curved surface hardened by quenching on one end surface. A bearing for a swivel seat, comprising: a plug body inserted into and fixed to a plug hole, the concave curved surface serving as a rolling surface, and a surface hardened layer provided around the entire circumference of the rolling surface.
が対向して形成する転走溝に玉を装入する装入用通孔で
ある請求項１記載の旋回座用軸受。2. The swivel seat according to claim 1, wherein the plug hole is a charging through hole for charging a ball into a rolling groove formed by the inner raceway surface and the outer raceway surface facing each other. bearing.
れによる表面硬化層を備えた旋回座用軸受の製造方法に
おいて、 当該軌道輪に転走面を形成する工程と、当該転走面幅よ
り大径の開口部が当該転走面を切断するように軌道輪半
径方向に栓孔を穿孔する工程と、ついで当該開口部を始
端として高周波コイルによる加熱部を当該転走面に連続
移動させて当該開口部を終端とする移動焼入れ工程と、
別途に栓体の一端面に凹曲面を形成して焼入れ硬化層を
形成する工程と、当該栓体を当該穿孔に挿嵌して固定す
る工程と、から成り、 当該凹曲面をもって転走面となして、転走面全周にわた
って表面硬化層を備えたことを特徴とする旋回座用軸受
の製造方法。3. A method for manufacturing a bearing for swivel bearing, comprising a surface hardened layer formed by moving and quenching high-frequency heating on a raceway surface of a bearing ring, the step of forming a raceway surface on the bearing ring, and the rolling surface. A step of punching a plug hole in the radial direction of the bearing ring so that an opening having a diameter larger than the width cuts the rolling contact surface, and then continuously moving the heating part by the high frequency coil to the rolling contact surface starting from the opening. And a moving quenching step that terminates the opening,
Separately, the step of forming a concave curved surface on one end surface of the plug body to form a quench-hardened layer, and the step of inserting the plug body into the perforation and fixing it, the rolling surface having the concave curved surface. A method for manufacturing a bearing for a swivel seat, characterized in that a surface-hardened layer is provided over the entire circumference of the rolling surface.
輪を貫通して穿孔し、内輪転走面と外輪転走面とが対向
して形成する転走溝に玉を装入する装入用通孔とした請
求項３記載の旋回座用軸受の製造方法。4. The plug hole is bored through the raceway in the radial direction of the raceway ring, and a ball is inserted into a rolling groove formed by the inner raceway surface and the outer raceway surface facing each other. The method for manufacturing a bearing for a swivel seat according to claim 3, wherein the through hole is for charging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04197646A JP3084540B2 (en) | 1992-06-30 | 1992-06-30 | Bearing for swivel seat and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04197646A JP3084540B2 (en) | 1992-06-30 | 1992-06-30 | Bearing for swivel seat and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0617823A true JPH0617823A (en) | 1994-01-25 |
| JP3084540B2 JP3084540B2 (en) | 2000-09-04 |
Family
ID=16377957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04197646A Expired - Fee Related JP3084540B2 (en) | 1992-06-30 | 1992-06-30 | Bearing for swivel seat and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3084540B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0826783A3 (en) * | 1996-08-26 | 1998-11-25 | KOENIG & BAUER-ALBERT AKTIENGESELLSCHAFT | Curved disc and method for manufacturing thereof |
| KR100940949B1 (en) * | 2007-12-31 | 2010-02-05 | 재단법인서울대학교산학협력재단 | Transportation apparatus for operation unit |
| KR100968286B1 (en) * | 2007-12-31 | 2010-07-07 | 재단법인서울대학교산학협력재단 | Transportation apparatus for operation unit |
| WO2011010664A1 (en) | 2009-07-22 | 2011-01-27 | Ntn株式会社 | Method for heat-treating a ring-shaped member, method for producing a ring-shaped member, ring-shaped member, bearing ring, rolling bearing, and method for producing a bearing ring |
| WO2012098988A1 (en) | 2011-01-21 | 2012-07-26 | Ntn株式会社 | Method for manufacturing bearing ring, bearing ring, and rolling bearing |
| JP2012177436A (en) * | 2011-02-25 | 2012-09-13 | Nsk Ltd | Curvilinear motion apparatus |
| JP2012526247A (en) * | 2009-05-06 | 2012-10-25 | アクツィエブーラゲート エスケイエフ | Race element and bearing device for large rolling bearing |
-
1992
- 1992-06-30 JP JP04197646A patent/JP3084540B2/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0826783A3 (en) * | 1996-08-26 | 1998-11-25 | KOENIG & BAUER-ALBERT AKTIENGESELLSCHAFT | Curved disc and method for manufacturing thereof |
| US5957004A (en) * | 1996-08-26 | 1999-09-28 | Koenig & Bauer-Albert Aktiengesellschaft | Cam disk and method for producing a cam disk |
| KR100940949B1 (en) * | 2007-12-31 | 2010-02-05 | 재단법인서울대학교산학협력재단 | Transportation apparatus for operation unit |
| KR100968286B1 (en) * | 2007-12-31 | 2010-07-07 | 재단법인서울대학교산학협력재단 | Transportation apparatus for operation unit |
| JP2012526247A (en) * | 2009-05-06 | 2012-10-25 | アクツィエブーラゲート エスケイエフ | Race element and bearing device for large rolling bearing |
| JP2015232396A (en) * | 2009-05-06 | 2015-12-24 | アクツィエブーラゲート エスケイエフＡｋｔｉｅｂｏｌａｇｅｔ ＳＫＦ | Raceway element for large roller bearing and bearing device |
| WO2011010664A1 (en) | 2009-07-22 | 2011-01-27 | Ntn株式会社 | Method for heat-treating a ring-shaped member, method for producing a ring-shaped member, ring-shaped member, bearing ring, rolling bearing, and method for producing a bearing ring |
| EP2987873A2 (en) | 2009-07-22 | 2016-02-24 | NTN Corporation | Method for heat-treating a ring-shaped member, method for producing a ring-shaped member, ring-shaped member, bearing ring, rolling bearing, and method for producing a bearing ring |
| WO2012098988A1 (en) | 2011-01-21 | 2012-07-26 | Ntn株式会社 | Method for manufacturing bearing ring, bearing ring, and rolling bearing |
| US9487843B2 (en) | 2011-01-21 | 2016-11-08 | Ntn Corporation | Method for producing a bearing ring |
| JP2012177436A (en) * | 2011-02-25 | 2012-09-13 | Nsk Ltd | Curvilinear motion apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3084540B2 (en) | 2000-09-04 |
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