JPH0679616A - Method for superfinishing annular groove - Google Patents
Method for superfinishing annular grooveInfo
- Publication number
- JPH0679616A JPH0679616A JP25586092A JP25586092A JPH0679616A JP H0679616 A JPH0679616 A JP H0679616A JP 25586092 A JP25586092 A JP 25586092A JP 25586092 A JP25586092 A JP 25586092A JP H0679616 A JPH0679616 A JP H0679616A
- Authority
- JP
- Japan
- Prior art keywords
- superfinishing
- grindstone
- inner ring
- annular groove
- ring groove
- 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
Landscapes
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、玉軸受軌道輪のボー
ル転走溝等のような断面円弧状の環状溝を超仕上加工す
るための環状溝の超仕上加工方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of superfinishing an annular groove for superfinishing an annular groove having an arcuate cross section such as a ball rolling groove of a ball bearing race.
【０００２】[0002]
【従来の技術】従来、断面円弧状の環状溝を有する被加
工物である例えば玉軸受の内輪を回転させた状態で前記
環状溝に砥石を揺動させながら押圧接触させることによ
り、前記環状溝を超仕上加工する環状溝の超仕上加工方
法は、例えば特開平４−４６７６２号公報等により公知
である。2. Description of the Related Art Conventionally, for example, an inner ring of a ball bearing, which is a workpiece having an annular groove having an arcuate cross section, is rotated to bring the stone into contact with the annular groove while swinging a grindstone. A method of superfinishing an annular groove for superfinishing is known from, for example, Japanese Patent Application Laid-Open No. 4-46762.
【０００３】これは、図１０及び図１１に示す如く矢印
方向に回転する玉軸受の内輪（被加工物）１の内輪溝
（環状溝）２に、その断面円弧中心と同心の揺動中心０
を有する超仕上砥石３を、内輪溝２の断面円弧中心線に
対して＋α〜−α迄揺動させながら押圧接触させること
により、内輪溝２を超仕上加工するようにしたものであ
る。図１０においてＡは内輪１の周方向に対する砥石３
の中央位置を、Ｂは内輪１の周方向に対する砥石３の端
部位置をそれぞれ示す。As shown in FIGS. 10 and 11, an inner ring groove (annular groove) 2 of an inner ring (workpiece) 1 of a ball bearing that rotates in the direction of an arrow has a swing center 0 which is concentric with the arc center of its cross section.
The inner ring groove 2 is superfinished by pressing and contacting the superfinishing grindstone 3 having the above with the center line of the arc of the inner ring groove 2 while swinging from + α to −α. In FIG. 10, A is the grindstone 3 in the circumferential direction of the inner ring 1.
, B indicates the end position of the grindstone 3 with respect to the circumferential direction of the inner ring 1.
【０００４】図１１（イ）は、砥石３が内輪溝２の断面
円弧中心線に対して＋αの位置に揺動したときの図１０
のＨ方向の拡大矢視図であり、図１１（ロ）は、この時
の超仕上加工初期における切削角がθ1であり、超仕上
加工終期において砥石３の揺動速度を遅くしたり、内輪
１の回転数を速くしたりして、切削角をθ2（θ2＜
θ1）と小さくしていることを示している。FIG. 11A shows the state in which the grindstone 3 is swung to the position of + α with respect to the center line of the circular arc of the inner ring groove 2.
11 (b) is a cutting angle θ 1 in the initial stage of superfinishing at this time, and the rocking speed of the grindstone 3 is slowed at the end of superfinishing, The cutting angle is set to θ 2 (θ 2 <
It shows that it is as small as θ 1 ).
【０００５】図１２は図１０に示す状態における内輪溝
２と対向している砥石３の面を、図１３は同砥石３と対
向している内輪溝２の面をそれぞれ示している。これら
の図１２及び図１３において、斑点部分は砥石３と内輪
溝２との面接触領域を示している。FIG. 12 shows the surface of the grindstone 3 facing the inner ring groove 2 in the state shown in FIG. 10, and FIG. 13 shows the surface of the inner ring groove 2 facing the grindstone 3. In FIGS. 12 and 13, the spotted portion indicates the surface contact area between the grindstone 3 and the inner ring groove 2.
【０００６】図１４は砥石３が内輪溝２の断面円弧中心
線に対して振角０°の位置にあるときの図１０のＪ−Ｊ
断面図であり、この位置では砥石３と内輪溝２とが中央
位置Ａ−Ａの全幅に亘って線接触をしており、同図中、
４はその線接触部を示している。この図１４における中
央位置Ａ−Ａ（図１２及び図１３参照）では、内輪溝２
の断面円弧中心と砥石３の揺動中心０は互いに合致して
いるので、砥石３が揺動している間も線接触部４は常時
接触状態を保持している。FIG. 14 shows JJ of FIG. 10 when the grindstone 3 is at a position where the swing angle is 0 ° with respect to the center line of the circular arc of the cross section of the inner ring groove 2.
It is a cross-sectional view, and in this position, the grindstone 3 and the inner ring groove 2 are in line contact over the entire width of the central position A-A.
Reference numeral 4 indicates the line contact portion. At the central position AA (see FIGS. 12 and 13) in FIG. 14, the inner ring groove 2
Since the center of the circular arc of the cross section and the swing center 0 of the grindstone 3 coincide with each other, the line contact portion 4 always maintains the contact state while the grindstone 3 swings.
【０００７】図１５は、砥石３が内輪溝２の断面円弧中
心線に対して＋αの位置に揺動した時の図１０のＫ−Ｋ
断面図であり、この位置では内輪溝２の位置は内輪１の
径寸法の曲率により砥石３の揺動中心０よりも下がって
いるので、砥石３は＋αの最大振角時に内輪溝２の幅方
向略中間部より一側位置５で該内輪溝２と面接触し、−
αの最大振角時には内輪溝２の幅方向略中間部より他側
位置６で該内輪溝２と面接触しているだけで、その間の
砥石３の揺動時において砥石３は、内輪溝２の肩部７ま
たは８で支持された状態となっている。このとき、内輪
溝２と砥石３との間に生じる隙間９からは、切削屑や砥
石３の摩耗粉等が排出される。FIG. 15 shows the KK of FIG. 10 when the grindstone 3 swings to the position of + α with respect to the center line of the arc of the cross section of the inner ring groove 2.
It is a sectional view. In this position, the position of the inner ring groove 2 is lower than the swing center 0 of the grindstone 3 due to the curvature of the diameter of the inner ring 1, so that the whetstone 3 has a width of the inner ring groove 2 at the maximum swing angle of + α. A surface contact with the inner ring groove 2 at a position 5 on one side from the substantially middle portion in the direction,
At the maximum swing angle of α, the surface of the inner ring groove 2 is only in surface contact with the inner ring groove 2 at the position 6 on the other side of the widthwise intermediate portion of the inner ring groove 2. It is in a state of being supported by the shoulder portion 7 or 8. At this time, cutting chips, abrasion powder of the grindstone 3, and the like are discharged from the gap 9 formed between the inner ring groove 2 and the grindstone 3.
【０００８】そして、砥石３の揺動中心０と内輪溝２の
断面円弧中心とが合致している場合には、砥石３の中央
位置Ａ−Ａが内輪溝２と常時線接触して、砥石３の揺動
により最大切削角±θの正弦波曲線を描いて安定した超
仕上加工を行なっている。When the swing center 0 of the grindstone 3 and the cross-sectional arc center of the inner ring groove 2 are coincident with each other, the central position AA of the grindstone 3 is constantly in line contact with the inner ring groove 2 to cause the grindstone. Stable super finishing is performed by drawing a sine wave curve with a maximum cutting angle of ± θ by swinging 3.
【０００９】一方、砥石３の端部位置Ｂ−Ｂでは、砥石
３の正弦波曲線を描く揺動の間で、その振角が＋α及び
−αになるときだけ瞬間的に内輪溝２の幅方向一側位置
５または他側位置６と砥石３とで衝突接触を繰り返すこ
とになり、内輪溝２の超仕上加工精度の向上を図る上で
悪影響を及ぼしていた。On the other hand, at the end position BB of the grindstone 3, the width of the inner ring groove 2 is instantaneously increased only when the swing angle becomes + α and −α during the swing of the grindstone 3 which draws a sine wave curve. Collision contact is repeated between the one-side position 5 or the other-side position 6 and the grindstone 3, which adversely affects the improvement of the superfinishing accuracy of the inner ring groove 2.
【００１０】このような安定した内輪溝２と砥石３の線
接触と、断続する不安定な面接触との存在は、砥石３の
揺動中心０と内輪溝２の断面円弧中心とが合致しない場
合にも発生し、また内輪溝２だけではなく、外輪溝，ス
ラスト玉軸受溝及び玉軸受以外の環状溝の超仕上加工を
行なう場合にも発生し、いずれも悪影響を及ぼしてい
た。The existence of such stable line contact between the inner ring groove 2 and the grindstone 3 and intermittent unstable surface contact does not coincide with the swing center 0 of the grindstone 3 and the cross-sectional arc center of the inner ring groove 2. This occurs not only in the inner ring groove 2, but also in the case of superfinishing not only the inner ring groove 2 but also the outer ring groove, the thrust ball bearing groove, and the annular groove other than the ball bearing, and all of them have an adverse effect.
【００１１】ところで、上述した如く従来方法にあって
は、超仕上加工の初期においては、砥石３の揺動速度を
高くし、更には内輪１の回転数を低くする等して、また
超仕上加工の終期においては、砥石３の揺動速度を低く
し、更には内輪１の回転数を高くする等して、超仕上加
工時の切削角θを小さくして砥石３の損耗を防ぐ等して
高精度を生成している。By the way, in the conventional method as described above, in the initial stage of super-finishing, the rocking speed of the grindstone 3 is increased, and further, the rotational speed of the inner ring 1 is decreased, and the super-finishing is performed again. At the end of machining, the rocking speed of the grindstone 3 is lowered, and further, the rotation speed of the inner ring 1 is increased to reduce the cutting angle θ during superfinishing to prevent the grindstone 3 from being worn. Produces high precision.
【００１２】しかし、斯かる従来方法は、図１６に示す
超仕上加工装置により実施されるもので、超仕上加工の
初期から終期迄の間、砥石３の揺動振角は一定であり、
従って振角で決まる砥石３の中心の振幅Ｌは図１１に示
す如く常に一定であった。However, such a conventional method is carried out by the superfinishing apparatus shown in FIG. 16, and the rocking oscillation angle of the grindstone 3 is constant from the initial stage to the final stage of the superfinishing.
Therefore, the amplitude L of the center of the grindstone 3 determined by the swing angle was always constant as shown in FIG.
【００１３】即ち、図１６に示す超仕上加工装置は、モ
ータ１０の回転軸１０ａに一端を固定した第１アーム１
１の他端に第２アーム１２の一端をピン１３にて回動自
在に連結し、この第２アーム１２の他端に第３アーム１
４の一端をピン１５にて回動自在に連結し、第３アーム
１４の他端を固定位置に砥石３の揺動支点となるピン１
６にて回動自在に取り付け、この第３アーム１４に砥石
３を一体回動自在に取り付けた構成である。そして、第
１アーム１１の軸線が図中、実線で示すＤの位置にある
とき、第３アーム１４は実線で示す如く振角０°の位置
にあり、モータ１０を矢印方向に回転することにより、
第１〜第３アーム１１，１２，１４を介して砥石３がピ
ン１６を中心に振角０°の位置を境にして±αの振角で
揺動するものである。That is, the superfinishing apparatus shown in FIG. 16 has the first arm 1 whose one end is fixed to the rotary shaft 10a of the motor 10.
One end of the second arm 12 is rotatably connected to the other end of the first arm 12 by a pin 13, and the other end of the second arm 12 is connected to the other end of the third arm 1.
4, one end of which is rotatably connected by a pin 15, and the other end of the third arm 14 is fixed to a pin 1 which serves as a swing fulcrum of the grindstone 3.
6 is a structure in which the grindstone 3 is rotatably attached to the third arm 14, and the grindstone 3 is integrally rotatably attached to the third arm 14. When the axis of the first arm 11 is at the position D shown by the solid line in the drawing, the third arm 14 is at the swing angle 0 ° as shown by the solid line, and the motor 10 is rotated in the arrow direction. ,
The grindstone 3 swings with a swing angle of ± α around the position of the swing angle of 0 ° around the pin 16 via the first to third arms 11, 12, and 14.
【００１４】[0014]
【発明が解決しようとする課題】上述した従来方法にお
いては、砥石３の揺動振角が超仕上加工初期から超仕上
加工終期に亘って常に一定であるから、超仕上加工の切
削角θは上述した方法によって小さくすることはできる
が、実際の砥石３と内輪溝２との接触部で起きている複
雑な現象、即ち切削角θで安定して接触する線接触部に
対して、±方向の最大振角時のみに断続接触を繰り返す
不安定な面接触部の悪影響を排除できず、しかも前記面
接触部はプランジ加工になるという問題点があった。In the above-mentioned conventional method, the swing angle of the grindstone 3 is always constant from the initial stage of superfinishing to the final stage of superfinishing. Therefore, the cutting angle θ of superfinishing is Although it can be reduced by the method described above, the complicated phenomenon occurring at the actual contact portion between the grindstone 3 and the inner ring groove 2, that is, the ± direction with respect to the line contact portion that makes stable contact at the cutting angle θ There is a problem in that the adverse effect of the unstable surface contact portion in which intermittent contact is repeated only at the maximum vibration angle cannot be eliminated, and the surface contact portion is plunged.
【００１５】本発明は上記事情に鑑みてなされたもの
で、その目的は、超仕上加工の終期において上述した不
安定な面接触を排除して、安定した線接触のみによる切
削角θの小さな超仕上加工を行なって、加工精度の向上
を図った環状溝の超仕上加工方法を提供することであ
る。The present invention has been made in view of the above circumstances, and an object thereof is to eliminate the unstable surface contact described above at the final stage of the superfinishing process, and to reduce the cutting angle θ by only stable line contact. An object of the present invention is to provide a superfinishing method for an annular groove, which is subjected to finishing work to improve the working accuracy.
【００１６】[0016]
【課題を解決するための手段】上述した目的を達成する
ため本発明は、断面円弧状の環状溝を有する被加工物を
回転させた状態で、前記環状溝に砥石を揺動させながら
押圧接触させることにより、前記環状溝を超仕上加工す
る超仕上加工方法において、超仕上加工初期においては
前記砥石を前記環状溝の断面円弧中心線に対して±１４
°〜±２４°の範囲の振角で揺動させ、且つ超仕上加工
終期においては前記砥石を前記環状溝の断面円弧中心線
に対して０°〜±１４°の範囲の振角で揺動させること
を特徴とするものである。In order to achieve the above-mentioned object, the present invention provides a pressing contact while rotating a workpiece having an annular groove having an arcuate cross section while swinging a grindstone in the annular groove. By doing so, in the superfinishing method for superfinishing the annular groove, in the initial stage of superfinishing, the grindstone is ± 14 relative to the circular arc center line of the annular groove.
Oscillate at an oscillation angle in the range of 0 ° to ± 24 °, and at the end of superfinishing, the whetstone oscillates at an oscillation angle in the range of 0 ° to ± 14 ° with respect to the center line of the circular arc of the cross section of the annular groove. It is characterized by that.
【００１７】[0017]
【作用】超仕上加工の終期における砥石の揺動振角が、
超仕上加工の初期における砥石の揺動振角より小さくな
るため、超仕上加工の初期において±各々の揺動振角最
大時に断続的に接触を繰り返していた被加工物の環状溝
と砥石との面接触部は、超仕上加工終期において接触し
なくなり、安定した接触を続ける線接触部のみが切削角
θを小さくした状態で引き続いて安定して接触し続け、
安定した超仕上加工を行なうことができる。[Function] The wobbling angle of the whetstone at the end of super finishing is
Since it is smaller than the rocking oscillation angle of the grindstone in the initial stage of super-finishing, the contact between the annular groove and the grindstone of the work piece that has repeatedly contacted ± at the maximum of each rocking oscillation angle in the initial stage of super-finishing The surface contact part stops contacting at the end of superfinishing and continues stable contact Only the line contact part continues stable contact with the cutting angle θ reduced,
Stable super finishing can be performed.
【００１８】この時、前記線接触部以外の砥石と被加工
物の環状溝との間は総て、隙間があいた状態となってお
り、この隙間から切削屑や砥石の摩耗粉等が良好に排出
される。この状態は、砥石の摩耗の少ない超砥粒超仕上
砥石において特に発揮され、超仕上加工品質の向上が顕
著となるものである。At this time, there is a gap between the grindstone other than the line contact portion and the annular groove of the workpiece, and cutting dust, abrasion powder of the grindstone, and the like are satisfactorily provided from this gap. Is discharged. This state is particularly exhibited in a superabrasive grain superfinishing grindstone in which the grindstone wear is small, and the improvement of the superfinishing processing quality is remarkable.
【００１９】[0019]
【実施例】以下、本発明の実施例を図１〜図９に基づき
説明する。なお、本発明において上述した従来と同一部
分については図面に同一符号を付して説明する。Embodiments of the present invention will be described below with reference to FIGS. It should be noted that, in the present invention, the same parts as those of the above-described conventional device will be described with the same reference numerals in the drawings.
【００２０】図１は本発明の一実施例に係る超仕上加工
方法によって、矢印方向に回転する玉軸受の内輪１の内
輪溝２に、その断面円弧中心と同心の揺動中心０を有す
る超仕上砥石３を、図２に示す如く内輪溝２の断面円弧
中心線に対して＋α1〜−α1の範囲及び＋α2〜−α2の
範囲で揺動させながら押圧接触させることにより、超仕
上加工している状態を示す側面図である。図２（イ）
は、砥石３が内輪溝２の断面円弧中心線に対して＋α1
の位置に揺動したときの図１のＣ方向の拡大矢視図であ
る。FIG. 1 shows a superfinishing method according to an embodiment of the present invention in which an inner ring groove 2 of an inner ring 1 of a ball bearing rotating in the direction of an arrow has a swing center 0 concentric with the arc center of its cross section. As shown in FIG. 2, the finishing grindstone 3 is pressed and brought into contact while swinging in the range of + α 1 to −α 1 and the range of + α 2 to −α 2 with respect to the center line of the arc of the cross section of the inner ring groove 2. It is a side view which shows the state which is finishing. Figure 2 (a)
Is + α 1 with respect to the arc center line of the cross section of the inner ring groove 2
It is an enlarged arrow view of the C direction of FIG.
【００２１】本発明方法において、上述した従来方法と
異なる新規な点は、超仕上加工の初期においては砥石３
の振角を＋α1〜−α1（α1の値としては、砥石３が目
詰まりせず良好な切れ味と仕上加工精度が得られる値、
即ち１４°〜２４°の範囲が望ましい。）の正弦波曲線
または近似正弦波曲線で超仕上加工を行ない、超仕上加
工の終期においては砥石３の振角を＋α2〜−α2（α2
の値としては、砥石３の内輪溝２との断続する面接触を
避けるため、超仕上加工初期の振角α1の値より小さい
値として０°〜１４°の範囲で、その他の加工条件との
関係で目詰まりしないで良好な仕上加工精度が得られる
値が望ましい。）の正弦波曲線または揺動停止で超仕上
加工を行なうことである。In the method of the present invention, a novel point different from the above-mentioned conventional method is that the grindstone 3 is used at the initial stage of superfinishing.
The swing angle of + α 1 to −α 1 (The value of α 1 is a value that can obtain good sharpness and finishing accuracy without clogging of the grindstone 3,
That is, the range of 14 ° to 24 ° is desirable. ) Sine wave curve or approximate sine wave curve is used for superfinishing, and at the end of superfinishing, the swing angle of the grindstone 3 is + α 2 to −α 2 (α 2
In order to avoid intermittent surface contact with the inner ring groove 2 of the grindstone 3, the value of is smaller than the value of the vibration angle α 1 at the initial stage of superfinishing in the range of 0 ° to 14 °, and other processing conditions Therefore, it is desirable that the value be such that good finishing accuracy can be obtained without clogging. ) Is to perform superfinishing with a sine wave curve or oscillation stop.
【００２２】斯かる本発明方法による内輪溝２の超仕上
加工時における砥石３の中心の内輪溝２の面上での超仕
上加工初期と超仕上加工終期の軌跡を示した図が図２
（ロ）である。同図にて明確なように、超仕上終期にお
いて砥石３の振角を±α1から±α2に小さくすることに
より、砥石３の振幅はＬからＬ1へ小さくなり且つ最大
切削角もθ1からθ2へ小さくなる。When superfinishing the inner ring groove 2 according to the method of the present invention, a diagram showing the loci of the initial superfinishing process and the end of the superfinishing process on the surface of the inner ring groove 2 at the center of the grindstone 3 is shown in FIG.
It is (b). As is clear from the figure, by reducing the swing angle of the grindstone 3 from ± α 1 to ± α 2 in the final stage of superfinishing, the amplitude of the grindstone 3 is reduced from L to L 1 and the maximum cutting angle is also θ. It decreases from 1 to θ 2 .
【００２３】砥石３の振角が±α1の時（超仕上加工の
初期時）は、上述した従来の図１０〜図１５と同様に高
能率の粗仕上加工が進行し、その後の超仕上加工終期で
小さな振角±α2で仕上加工を行なうことにより内輪溝
２の精密仕上加工を行なうものである。When the swing angle of the grindstone 3 is ± α 1 (at the initial stage of superfinishing), high-efficiency rough finishing proceeds as in the above-described conventional FIGS. 10 to 15, and the superfinishing thereafter. In the final stage of machining, the finishing is performed with a small swing angle ± α 2 so that the inner ring groove 2 is precisely finished.
【００２４】この時、砥石３の中央位置Ａ′−Ａ′で
は、図１のＤ−Ｄ断面図である図３に示すように、砥石
３は振角が±α2の正弦波曲線で揺動するが、該砥石３
と内輪溝２とは安定して常時接触し、中央位置Ａ′−
Ａ′の線接触部４の位置で揺動に従い内輪溝２がその全
幅に亘って高精度に超仕上加工される。At this time, at the center position A'-A 'of the grindstone 3, the grindstone 3 oscillates in a sine wave curve having a swing angle of ± α 2 as shown in FIG. It moves, but the whetstone 3
And the inner ring groove 2 are always in stable contact with each other, and the central position A'-
The inner ring groove 2 is superfinished with high precision over the entire width of the inner ring groove 2 according to the swing at the position of the line contact portion 4 of A '.
【００２５】一方、砥石３の端部位置Ｂ′−Ｂ′ではそ
の振角が±α1から±α2と小さくなったために、振角＋
α1及び−α1における最大振角時のみ内輪溝２と断続的
に面接触していた砥石３の面接触部５，６の部分は、振
角が±α2と小さくなった時には接触しなくなって、新
たに砥石３と内輪溝２との間に隙間９′が生じ、従来か
らある隙間９と共に切削屑及び砥石３の摩耗粉等を外部
に良好に排出するのに役立つ。On the other hand, at the end position B'-B 'of the grindstone 3, the vibration angle is reduced from ± α 1 to ± α 2 , so that the vibration angle +
The surface contact portions 5 and 6 of the grindstone 3 which were intermittently in surface contact with the inner ring groove 2 only at the maximum swing angle at α 1 and −α 1 are in contact when the swing angle becomes as small as ± α 2. A gap 9'is newly formed between the grindstone 3 and the inner ring groove 2 and serves to satisfactorily discharge the cutting debris, abrasion powder of the grindstone 3 and the like together with the conventional gap 9.
【００２６】このような隙間９′は、摩耗の少ない超砥
粒超仕上砥石の採用により、特に確保されるようにな
り、砥石３の目詰まりを防止し、本発明方法による超仕
上加工を効果的にしている。Such a gap 9'becomes particularly secured by employing a superabrasive grain superfinishing grindstone with less wear, preventing clogging of the grindstone 3 and effecting superfinishing by the method of the present invention. I am doing it.
【００２７】超仕上加工条件を下記表（Ｉ）に示す内容
として、本発明方法と従来方法による内輪溝２の超仕上
加工精度を比較した結果を図５〜図７に示す。The superfinishing conditions are shown in Table (I) below, and the results of comparing the superfinishing accuracy of the inner ring groove 2 by the method of the present invention and the conventional method are shown in FIGS.
【００２８】[0028]
【表１】 図５は内輪溝２の周方向ウェービネスの比較グラフ、図
６は内輪溝２の断面円弧形状精度の比較グラフ、図７は
内輪溝２の面あらさ精度の比較グラフであり、各図中、
線Ｆは本発明方法を、線Ｇは従来方法をそれぞれ示す。[Table 1] 5 is a comparative graph of circumferential waviness of the inner ring groove 2, FIG. 6 is a comparative graph of sectional circular arc shape accuracy of the inner ring groove 2, and FIG. 7 is a comparative graph of surface roughness accuracy of the inner ring groove 2.
Line F shows the method of the present invention, and line G shows the conventional method.
【００２９】これら図５〜図７にて明らかなように、内
輪溝２の周方向ウェービネス、内輪溝２の断面円弧形状
精度及び内輪溝２の面あらさ精度のいずれも、本発明方
法による超仕上加工の方が従来方法による超仕上加工に
比して向上するものである。As can be seen from FIGS. 5 to 7, the circumferential waviness of the inner ring groove 2, the accuracy of the arc shape of the cross section of the inner ring groove 2 and the surface roughness accuracy of the inner ring groove 2 are all super finishes according to the method of the present invention. The processing is improved as compared with the conventional super finishing processing.
【００３０】図８は本発明方法を実施するための超仕上
加工装置の第１実施例を示す原理構成図である。同図
中、１７はサーボモータで、その回転軸１７ａに、一端
が固定された第１アーム１８の他端には、第２アーム１
９の一端がピン２０により回動自在に連結されている。
第２アーム１９の他端には第３アーム２１の一端がピン
２２により回動自在に連結され、この第３アーム２１の
他端は固定位置に、砥石３の揺動支点となるピン２３に
より回動自在に取り付けられている。第１アーム１８が
図中、実線で示すＤの位置にあるとき、第３アーム２１
は実線で示す如く振角０°の位置にある。FIG. 8 is a principle block diagram showing a first embodiment of a superfinishing apparatus for carrying out the method of the present invention. In the figure, reference numeral 17 is a servo motor, and a rotary shaft 17a has a first arm 18 having one end fixed to the other end and a second arm 1 to the other end.
One end of 9 is rotatably connected by a pin 20.
One end of a third arm 21 is rotatably connected to the other end of the second arm 19 by a pin 22, and the other end of the third arm 21 is fixed at a fixed position by a pin 23 serving as a swing fulcrum of the grindstone 3. It is rotatably attached. When the first arm 18 is at the position D shown by the solid line in the figure, the third arm 21
Is at a position where the swing angle is 0 ° as shown by the solid line.
【００３１】そして、サーボモータ１７を駆動すること
により第１アーム１８が超仕上初期ではＤ位置を境にし
て±α1の旋回角度で往復旋回し、これにより、第２ア
ーム１９を介して第３アーム２１が振角０°の位置を境
に±α1の振角で揺動するものである。By driving the servomotor 17, the first arm 18 reciprocally rotates at a turning angle of ± α 1 with the D position as a boundary in the initial stage of superfinishing, whereby the first arm 18 is moved through the second arm 19. The three arms 21 swing at a swing angle of ± α 1 with a swing angle of 0 ° as a boundary.
【００３２】また、サーボモータ１７を駆動することに
より第１アーム１８が超仕上終期ではＤ位置を境にして
±α2の旋回角度で往復旋回し、これにより、第２アー
ム１９を介して第３アーム２１が振角０°の位置を境に
±α2の振角で揺動するものである。Further, by driving the servo motor 17, the first arm 18 reciprocally rotates at a turning angle of ± α 2 with the D position as a boundary at the end of superfinishing. The 3 arm 21 swings at a swing angle of ± α 2 at a position where the swing angle is 0 °.
【００３３】従って、第３アーム２１に装着された砥石
３が該第３アーム２１と一体に±α1及び±α2の振角で
それぞれ揺動するものである。Therefore, the grindstone 3 mounted on the third arm 21 swings integrally with the third arm 21 at swing angles of ± α 1 and ± α 2 .
【００３４】図９は本発明方法を実施するための超仕上
加工装置の第２実施例を示す原理構成図である。同図
中、２４は通常の標準タイプのモータで、その回転軸２
４ａに一端が固定された第１アーム２５の他端には第２
アーム２６の一端がピン２７により回動自在に連結され
ている。この第２アーム２６の他端には、２段階に亘っ
て長さ調節可能な第３アーム２８の一端がピン２９によ
り回動自在に連結されている。この第３アーム２８の他
端は固定位置に、砥石３の揺動支点となるピン３０によ
り回動自在に取り付けられてる。第１アーム２５が図
中、実線で示すＤの位置にあるとき、第３アーム２８は
実線で示す如く振角０°の位置にある。FIG. 9 is a principle block diagram showing a second embodiment of a superfinishing apparatus for carrying out the method of the present invention. In the figure, 24 is a normal standard type motor, and its rotary shaft 2
A second arm is attached to the other end of the first arm 25 whose one end is fixed to 4a.
One end of the arm 26 is rotatably connected by a pin 27. To the other end of the second arm 26, one end of a third arm 28 whose length can be adjusted in two steps is rotatably connected by a pin 29. The other end of the third arm 28 is rotatably attached to a fixed position by a pin 30 serving as a swing fulcrum of the grindstone 3. When the first arm 25 is at the position D shown by the solid line in the figure, the third arm 28 is at the position where the swing angle is 0 ° as shown by the solid line.
【００３５】そして、超仕上加工初期においては、第３
アーム２８の長さをｌ1に設定して短くした状態で、モ
ータ２４を一方向に回転させることにより、第１アーム
２５〜第３アーム２８を介して砥石３がピン３０を中心
に振角０°の位置を境にして±α1の振角で揺動するも
のである。At the beginning of superfinishing, the third
By rotating the motor 24 in one direction with the length of the arm 28 set to l 1 and shortened, the grindstone 3 swings around the pin 30 via the first arm 25 to the third arm 28. It swings at a swing angle of ± α 1 with a 0 ° position as a boundary.
【００３６】また超仕上終期においては、第３アーム２
８の長さをｌ2（ｌ2＞ｌ1）に設定して長くした状態
で、モータ２４を一方向に回転させることにより、第１
アーム２５〜第３アーム２８を介して砥石３がピン３０
を中心に振角０°の位置を境にして±α2の振角で揺動
するものである。At the end of superfinishing, the third arm 2
By setting the length of 8 to l 2 (l 2 > l 1 ) and lengthening it, the motor 24 is rotated in one direction,
The grindstone 3 has a pin 30 through the arm 25 to the third arm 28.
With the center of the center being a swing angle of 0 °, the swing is made at a swing angle of ± α 2 .
【００３７】なお、第３アーム２８の長さの調節は、油
圧シリンダ機構或は磁力、その他、従来周知の適宜の手
段を採用し得るものである。The length of the third arm 28 can be adjusted by using a hydraulic cylinder mechanism, magnetic force, or any other suitable means known in the art.
【００３８】なお、第３アーム２８の長さを変換する代
わりに、第１アーム２５の長さを変換して、上記同様に
砥石３の振角を±α1から±α2に変換するようにしても
同様の効果を得ることができる。Instead of changing the length of the third arm 28, the length of the first arm 25 is changed so that the swing angle of the grindstone 3 is changed from ± α 1 to ± α 2 as described above. However, the same effect can be obtained.
【００３９】また、上述した各実施例においては、玉軸
受の内輪溝を超仕上加工する場合について説明したが、
これに限られることなく玉軸受の外輪溝、スラスト玉軸
受の溝、ボールネジの溝或は玉軸受、ボールネジ及びリ
ニアガイド等のゴジックアーチ溝等を超仕上加工する場
合にも、本発明方法を適用し得るものである。In each of the above-described embodiments, the case where the inner ring groove of the ball bearing is superfinished has been described.
Not limited to this, the method of the present invention is also applied to superfinishing outer ring grooves of ball bearings, grooves of thrust ball bearings, grooves of ball screws or ball bearings, ball screw and linear guides, etc. It is possible.
【００４０】[0040]
【発明の効果】本発明の環状溝の超仕上加工方法によれ
ば、超仕上加工の終期において砥石の揺動振角が超仕上
加工初期のそれより小さくなるから、揺動振角が最大と
なる毎に断続的に砥石が被加工物に衝突を繰り返すこと
がなくなるため、安定した線接触部での加工がより一層
安定したものとなり、超仕上加工精度が向上する。即
ち、環状溝の周方向ウェービネス、環状溝の断面円弧形
状精度及び環状溝の面あらさ精度がいずれも従来方法に
比して向上し、面あらさのスクラッチが減少する。According to the method for superfinishing an annular groove of the present invention, the swinging vibration angle of the grindstone becomes smaller than that at the initial stage of superfinishing processing at the end of the superfinishing processing. Since the grindstone does not repeatedly collide with the work piece intermittently every time, the processing at the stable line contact portion becomes more stable and the super-finishing processing accuracy improves. That is, the circumferential waviness of the annular groove, the circular arc shape accuracy of the annular groove, and the surface roughness accuracy of the annular groove are all improved as compared with the conventional method, and scratches on the surface roughness are reduced.
【００４１】この効果は、超仕上砥石に超砥粒砥石を用
いた時に顕著となり、その結果、音響精度、振動精度、
回転精度のよい玉軸受等を高能率及び低コストで大量生
産することが可能となる。This effect is remarkable when a superabrasive grindstone is used as the superfinishing grindstone, and as a result, acoustic accuracy, vibration accuracy,
It is possible to mass-produce ball bearings and the like with good rotation accuracy with high efficiency and low cost.
【図１】本発明の一実施例に係る超仕上加工方法によっ
て玉軸受の内輪の内輪溝を超仕上加工している状態を示
す側面図である。FIG. 1 is a side view showing a state in which an inner ring groove of an inner ring of a ball bearing is superfinished by a superfinishing method according to an embodiment of the present invention.
【図２】図１のＣ方向の拡大矢視図である。FIG. 2 is an enlarged arrow view in the C direction of FIG.
【図３】図１のＤ−Ｄ断面図である。FIG. 3 is a sectional view taken along line DD of FIG.
【図４】図１のＥ−Ｅ断面図である。4 is a sectional view taken along line EE of FIG.
【図５】本発明方法と従来方法による加工精度の比較図
である。FIG. 5 is a comparison diagram of processing accuracy between the method of the present invention and the conventional method.
【図６】本発明方法と従来方法による加工精度の比較図
である。FIG. 6 is a comparison diagram of processing accuracy between the method of the present invention and the conventional method.
【図７】本発明方法と従来方法による加工精度の比較図
である。FIG. 7 is a comparison diagram of processing accuracy between the method of the present invention and the conventional method.
【図８】本発明方法を実施するための超仕上加工装置の
第１実施例を示す原理構成図である。FIG. 8 is a principle configurational diagram showing a first embodiment of a superfinishing apparatus for carrying out the method of the present invention.
【図９】本発明方法を実施するための超仕上加工装置の
第２実施例を示す原理構成図である。FIG. 9 is a principle configurational diagram showing a second embodiment of a super-finishing device for carrying out the method of the present invention.
【図１０】従来の超仕上加工方法によって玉軸受の内輪
の内輪溝を超仕上加工している状態を示す側面図であ
る。FIG. 10 is a side view showing a state in which the inner ring groove of the inner ring of the ball bearing is superfinished by the conventional superfinishing method.
【図１１】図１０のＨ方向の拡大矢視図である。11 is an enlarged arrow view in the H direction of FIG.
【図１２】図１０の状態における内輪溝と対向している
砥石の面を示す図である。12 is a view showing a surface of the grindstone facing the inner ring groove in the state of FIG.
【図１３】図１０の状態における砥石と対向している内
輪溝の面を示す図である。13 is a view showing a surface of the inner ring groove facing the grindstone in the state of FIG.
【図１４】図１０のＪ−Ｊ断面図である。14 is a sectional view taken along line JJ of FIG.
【図１５】図１０のＫ−Ｋ断面図である。15 is a sectional view taken along the line KK of FIG.
【図１６】従来方法を実施するための超仕上加工装置の
原理構成図である。FIG. 16 is a principle configuration diagram of a superfinishing device for carrying out a conventional method.
１ 内輪（被加工物） ２ 内輪溝（環状溝） ３ 砥石 1 Inner ring (workpiece) 2 Inner ring groove (annular groove) 3 Grindstone
Claims (1)
回転させた状態で、前記環状溝に砥石を揺動させながら
押圧接触させることにより、前記環状溝を超仕上加工す
る超仕上加工方法において、超仕上加工初期においては
前記砥石を前記環状溝の断面円弧中心線に対して±１４
°〜±２４°の範囲の振角で揺動させ、且つ超仕上加工
終期においては前記砥石を前記環状溝の断面円弧中心線
に対して０°〜±１４°の範囲の振角で揺動させること
を特徴とする環状溝の超仕上加工方法。1. A super-finishing process for super-finishing an annular groove by rotating a workpiece having an annular groove having an arcuate cross section and pressingly contacting the annular groove while rocking a grindstone. In the method, in the initial stage of superfinishing, the grindstone is ± 14 with respect to the center line of the circular arc of the cross section of the annular groove.
Oscillate at an oscillation angle in the range of 0 ° to ± 24 °, and at the end of superfinishing, the whetstone oscillates at an oscillation angle in the range of 0 ° to ± 14 ° with respect to the center line of the circular arc of the cross section of the annular groove. A method for superfinishing an annular groove, which comprises:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25586092A JP3265640B2 (en) | 1992-08-31 | 1992-08-31 | Super finishing method and swing mechanism for annular groove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25586092A JP3265640B2 (en) | 1992-08-31 | 1992-08-31 | Super finishing method and swing mechanism for annular groove |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0679616A true JPH0679616A (en) | 1994-03-22 |
| JP3265640B2 JP3265640B2 (en) | 2002-03-11 |
Family
ID=17284592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25586092A Expired - Fee Related JP3265640B2 (en) | 1992-08-31 | 1992-08-31 | Super finishing method and swing mechanism for annular groove |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3265640B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002233940A (en) * | 2001-02-02 | 2002-08-20 | Koyo Seiko Co Ltd | Superfinishing apparatus |
| JP2009269111A (en) * | 2008-05-02 | 2009-11-19 | Seibu Jido Kiki Kk | Grinding device |
| JP2010052082A (en) * | 2008-08-27 | 2010-03-11 | Seibu Jido Kiki Kk | Grinding apparatus |
| JP2014030871A (en) * | 2012-08-02 | 2014-02-20 | Seibu Jido Kiki Kk | Super-finishing grinding device |
| CN103909463A (en) * | 2012-12-31 | 2014-07-09 | 德国索菲纳有限公司 | Finish machining device |
-
1992
- 1992-08-31 JP JP25586092A patent/JP3265640B2/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002233940A (en) * | 2001-02-02 | 2002-08-20 | Koyo Seiko Co Ltd | Superfinishing apparatus |
| JP2009269111A (en) * | 2008-05-02 | 2009-11-19 | Seibu Jido Kiki Kk | Grinding device |
| JP4531100B2 (en) * | 2008-05-02 | 2010-08-25 | 西部自動機器株式会社 | Grinding equipment |
| JP2010052082A (en) * | 2008-08-27 | 2010-03-11 | Seibu Jido Kiki Kk | Grinding apparatus |
| JP2014030871A (en) * | 2012-08-02 | 2014-02-20 | Seibu Jido Kiki Kk | Super-finishing grinding device |
| CN103909463A (en) * | 2012-12-31 | 2014-07-09 | 德国索菲纳有限公司 | Finish machining device |
| CN103909463B (en) * | 2012-12-31 | 2017-05-31 | 德国索菲纳有限公司 | Precise machining device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3265640B2 (en) | 2002-03-11 |
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