JPH0531665A - Grinding wheel vibration device for superfinish grinding machine - Google Patents
Grinding wheel vibration device for superfinish grinding machineInfo
- Publication number
- JPH0531665A JPH0531665A JP20634591A JP20634591A JPH0531665A JP H0531665 A JPH0531665 A JP H0531665A JP 20634591 A JP20634591 A JP 20634591A JP 20634591 A JP20634591 A JP 20634591A JP H0531665 A JPH0531665 A JP H0531665A
- Authority
- JP
- Japan
- Prior art keywords
- shaft
- eccentric shaft
- grindstone
- axis
- vibration
- 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
- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は超仕上研削盤に取り付け
られる砥石振動装置、特に玉軸受の外輪または内輪のボ
ール軌道面を超仕上研削加工する場合に超仕上砥石を該
ボール軌道面の円弧中心点で回転振動させるとともに該
ボール軌道面に対して圧接，退避可能に保持する超仕上
研削盤の砥石振動装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grindstone vibrating device mounted on a superfinishing grinder, and more particularly, when a ball raceway surface of an outer ring or an inner ring of a ball bearing is superfinished, the superfinishing grindstone is an arc of the ball raceway surface. The present invention relates to a grindstone vibrating device for a superfinishing grinder that rotationally vibrates at a center point and holds the ball raceway surface so that it can be pressed against and retracted.
【０００２】[0002]
【従来の技術】玉軸受の外輪あるいは内輪のボール軌道
面を砥石にて超仕上加工する場合は、前記外輪あるいは
内輪となるワークの片端面を主軸台の主軸先端に保持し
て回転させるとともにスティック状砥石をワークの被加
工周面溝に半径方向から加圧接触させ、同時に前記ステ
ィック状砥石を前記ワークの縦断面上における前記被加
工周面溝の円弧中心線のまわりに回転振動（揺動）させ
る方法がとられる。この方法においては、主軸へのワー
ク着脱時に前記スティック状砥石をワークに対して上昇
させ、研削動作に入る時に下降させることが必要とな
る。従来は前記砥石の加圧接触機構および前述の上下動
機構として油（空）圧のシリンダ装置が採用され、ワー
クの垂直中心線上の真上に砥石ホルダ（アーム）の上下
動シリンダおよび加圧シリンダが互いに同軸となるよう
に配置するか、あるいは砥石ホルダをワーク主軸線の方
向に伸長させ、レバー等を介して砥石の加圧および上下
動シリンダを含んだ砥石ホルダ支持ユニットを設けてい
た。また前記スティック状砥石の回転振動時の低イナー
シャを図り、高速振動を可能にしたものとしては、ボー
ル軌道面の前記円弧中心線の延長線上に軸支された振動
軸に取り付け、砥石ホルダをスライド機構を介して前記
上下動シリンダ機構部により直線方向に上下動させ、砥
石加圧シリンダのみを前記砥石ホルダのワーク真上位置
に具備するようにした超仕上研削加工装置が開示されて
いる（特開平３−１２１７７１号公報および特開平３−
１２１７７２号公報）。2. Description of the Related Art In the case of superfinishing a ball raceway of an outer ring or an inner ring of a ball bearing with a grindstone, one end face of a work to be the outer ring or the inner ring is held at a tip of a spindle of a headstock and rotated and a stick is attached. The grinding wheel is brought into pressure contact with the peripheral groove of the workpiece in the radial direction, and at the same time, the stick-shaped grinding stone is rotationally vibrated (oscillated) around the arc center line of the peripheral groove of the workpiece on the longitudinal section of the workpiece. ) Is taken. In this method, it is necessary to raise the stick-shaped grindstone with respect to the work when the work is attached to and detached from the spindle, and lower it when the grinding operation is started. Conventionally, an oil (pneumatic) cylinder device has been used as the pressure contact mechanism of the grindstone and the above-mentioned vertical movement mechanism, and the vertical movement cylinder and the pressure cylinder of the grindstone holder (arm) are directly above the vertical center line of the workpiece. Are arranged so as to be coaxial with each other, or the grindstone holder is extended in the direction of the work main axis, and a grindstone holder support unit including a grindstone pressurizing and vertical moving cylinder is provided via a lever or the like. In addition, a low inertia during rotation vibration of the stick-shaped grindstone to enable high-speed vibration is to be attached to a vibrating shaft axially supported on an extension line of the arc center line of the ball raceway surface and slide the grindstone holder. There is disclosed a super-finish grinding processing apparatus in which a vertical movement cylinder mechanism portion is moved up and down in a linear direction through a mechanism so that only a grinding stone pressure cylinder is provided at a position directly above a work of the grinding stone holder (special feature). Japanese Patent Laid-Open No. 3-121771 and Japanese Patent Laid-Open No. 3-121777
121772).
【０００３】[0003]
【発明が解決しようとする課題】上述した砥石加圧シリ
ンダおよび上下動シリンダをワーク中心の真上に配置し
たり、レバー外端部の砥石ホルダ支持ユニット上に砥石
加圧シリンダおよび上下動シリンダを互いに同軸配置し
た従来装置は砥石回転振動時の慣性重量が大きく、高速
回転振動を行うと砥石加圧力が周期的に変化し、要求さ
れる加工精度を維持できなくなるという問題がある。こ
れに対し前記砥石上下動シリンダ機構部を砥石加圧シリ
ンダから分離して振動軸に設けた前述の超仕上研削加工
装置は、砥石ホルダ側の低イナーシャ化が可能で砥石の
高速振動ひいては加工時間の短縮を図り得る点で優れて
いるが、上下動シリンダと砥石ホルダを連結するスライ
ド機構がダブテールを用いた直線移動機構のため完全に
防塵することが困難であり、また振動軸を直径方向から
上下動シリンダ機構部の一対のピストンが挟持して上下
動作するので、このピストンを動作させる油（空）圧ホ
ースも振動軸の回転振動動作でシリンダとともに揺動
し、ホースの寿命低下，破損を招き易いという問題があ
る。DISCLOSURE OF INVENTION Problems to be Solved by the Invention The above-mentioned grindstone pressurizing cylinder and vertical moving cylinder are arranged directly above the center of the work, or the grindstone pressing cylinder and vertical moving cylinder are mounted on the grindstone holder supporting unit at the outer end of the lever. The conventional devices arranged coaxially with each other have a large inertial weight during the rotational vibration of the grindstone, and when the high-speed rotational vibration is performed, the grindstone pressing force changes periodically, and the required machining accuracy cannot be maintained. On the other hand, the above-mentioned superfinishing grinding machine in which the whetstone up-and-down cylinder mechanism part is separated from the whetstone pressurizing cylinder and provided on the vibrating shaft is capable of low inertia on the whetstone holder side, high-speed vibration of the whetstone, and thus the machining time. However, the sliding mechanism that connects the vertical movement cylinder and the grindstone holder is a linear movement mechanism that uses a dovetail, so it is difficult to completely protect it from dust. Since a pair of pistons in the vertically moving cylinder mechanism part sandwiches and moves up and down, the hydraulic (pneumatic) hose that operates this piston also swings together with the cylinder due to the rotational vibration of the vibrating shaft, reducing the life of the hose and damaging it. There is a problem that it is easy to invite.
【０００４】そこで本発明は、ワーク中心の真上に砥石
加圧シリンダのみを配置して極低イナーシャによる高速
振動を確保するとともに、砥石が円弧運動でワークに接
離するように該砥石の作動を偏心軸の回転運動で行わ
せ、これによってワークに対する砥石の接離動作をスム
ーズにしかつ完全防塵を可能とし、またその駆動源とな
る上下動シリンダを固定側の砥石台に設置し、油（空）
圧ホースの揺動を排除した超仕上研削盤用砥石振動装置
を提供することにある。Therefore, according to the present invention, only the grindstone pressurizing cylinder is arranged just above the center of the work to ensure high-speed vibration due to extremely low inertia, and the grindstone operates so as to contact and separate from the work in an arc motion. Is performed by the rotary motion of the eccentric shaft, which makes the contacting and separating operation of the grindstone with respect to the workpiece smooth and completely dust-proof, and the up-and-down moving cylinder that is the driving source is installed on the fixed-side grindstone base, and the oil ( Sky)
An object of the present invention is to provide a grindstone vibrating device for a super finishing grinder, which eliminates the swing of the pressure hose.
【０００５】[0005]
【課題を解決するための手段】本発明による超仕上研削
盤用砥石振動装置は、砥石台に旋回可能に軸支された偏
心軸と、該偏心軸をその外周軸線のまわりに旋回させる
偏心軸旋回駆動機構と、前記偏心軸に該偏心軸の内周軸
線と同芯に回転可能に挿通されかつ先端に砥石ホルダが
固着された振動軸と、該振動軸に連結され該振動軸をそ
の軸線まわりに回転振動させる振動軸駆動機構とを有
し、前記振動軸はその軸線がワークの被加工周面溝の縦
断面上の円弧中心線と一致するように配置されている。SUMMARY OF THE INVENTION A grindstone vibrating device for a superfinishing grinder according to the present invention comprises an eccentric shaft rotatably supported by a grindstone, and an eccentric shaft for rotating the eccentric shaft around its outer peripheral axis. A swing drive mechanism, a vibration shaft that is rotatably inserted into the eccentric shaft concentrically with the inner peripheral axis of the eccentric shaft, and has a grindstone holder fixed to the tip thereof, and the vibration shaft is connected to the vibration shaft and the vibration shaft has its axis line. An oscillating shaft drive mechanism for rotating and oscillating around the oscillating shaft is arranged such that the axis line thereof coincides with the arc center line on the longitudinal section of the peripheral groove of the workpiece.
【０００６】[0006]
【作用】本発明においては、砥石台に軸支した中空の偏
心軸に振動軸を偏心して軸支し、砥石ホルダを前記振動
軸の軸端に固着し、前記偏心軸をクランプした状態で前
記振動軸をその軸線まわりに高速で回転振動させること
により、ワークの超仕上研削を行う。ワークの装填時あ
るいは排出時の砥石の逃げ（退避）動作は、前記偏心軸
のクランプを解除して該偏心軸を前記振動軸の軸線とは
異なる軸線まわりに、つまり該偏心軸の外周軸線まわり
に回転させる。これによって前記振動軸は前記偏心軸の
回転軸線を中心として旋回し、ホルダ先端の砥石は円弧
状に上昇あるいは下降してワークから離れ、あるいはワ
ークに接触する。このように砥石の上下動作は偏心軸の
回転で行うので該偏心軸および前記振動軸の軸支部のシ
ールのみで完全な防塵を図ることができる。砥石加圧シ
リンダはホルダのワーク真上に設けられ、前記偏心軸は
研削加工時の砥石の回転振動や砥石加圧とは関係なくな
るため、極低イナーシャで高速振動が可能となり、加工
能率が上がりコスト低減が図られる。前記偏心軸を回転
させるシリンダは砥石台に固定設置されるのでホースが
揺動せず、ホース切れが防止される。なお偏心軸は加工
動作時に油（空）圧クランプされるので偏心軸に組み込
まれる振動軸のころがり軸受のフレッティングも防止さ
れる。In the present invention, the oscillating shaft is eccentrically supported by the hollow eccentric shaft rotatably supported by the grindstone base, the grindstone holder is fixed to the shaft end of the oscillating shaft, and the eccentric shaft is clamped. The work is superfinished by rotating and vibrating the vibrating shaft around its axis at high speed. When the work is loaded or discharged, the whetstone escapes (retracts) by releasing the clamp of the eccentric shaft to move the eccentric shaft around an axis different from the axis of the vibrating shaft, that is, around the outer peripheral axis of the eccentric shaft. Rotate to. As a result, the vibrating shaft swivels around the rotation axis of the eccentric shaft, and the grindstone at the tip of the holder rises or descends in an arc shape to separate from the work or come into contact with the work. As described above, since the up and down movement of the grindstone is performed by the rotation of the eccentric shaft, complete dust protection can be achieved only by sealing the shaft supporting portions of the eccentric shaft and the vibrating shaft. The grindstone pressurizing cylinder is installed right above the work piece of the holder, and the eccentric shaft has nothing to do with the rotational vibration of the grindstone during grinding and grindstone pressurization, enabling high-speed vibration with extremely low inertia, thus improving machining efficiency. Cost reduction can be achieved. Since the cylinder that rotates the eccentric shaft is fixedly installed on the grindstone base, the hose does not swing and the hose is prevented from breaking. Since the eccentric shaft is hydraulically (pneumatically) clamped during the machining operation, fretting of the rolling bearing of the vibrating shaft incorporated in the eccentric shaft is also prevented.
【０００７】[0007]
【実施例】次に本発明を実施例について図面を参照して
説明する。図１および図２は本発明に係る超仕上研削盤
の砥石とワークの接触，離間状態を示した拡大縦断面図
である。図１の場合は玉軸受外輪１のボール軌道面１ａ
の超仕上加工、図２は玉軸受内輪２の軌道面２ａの超仕
上加工について示している。いずれもボール軌道面１
ａ，２ａは外輪，内輪（ワーク）の縦断面でみてＡ点を
中心とする円弧面で形成される。この円弧中心点Ａはま
たスティック状砥石３の研削時における回転振動の中心
点となっており、砥石３はこの点Ａを通りワークの軸線
方向に直角な水平円弧中心線のまわりに回転振動する。
なお後述するように研削時にはこの円弧中心線は振動軸
の軸線と一致している。Ｂ点はＡ点を通るワーク軸線と
平行な水平線上で該Ａ点よりｅだけ離れた点であり、こ
のＢ点を中心に砥石３が上方へ旋回することによりワー
クと干渉せずにボール軌道面１ａ，２ａから離れ、ワー
クの排出が可能となる。Ｃ点は砥石３の旋回上昇時のＡ
点の移行点である。なお後述するようにＢ点は偏心軸の
外周軸線上に位置する。Embodiments of the present invention will now be described with reference to the drawings. 1 and 2 are enlarged vertical cross-sectional views showing the contact and separation states of a grindstone and a work of a superfinishing grinder according to the present invention. In the case of FIG. 1, the ball raceway surface 1a of the ball bearing outer ring 1
2 shows the superfinishing of the raceway surface 2a of the inner ring 2 of the ball bearing. Ball raceway 1
a and 2a are formed by arcuate surfaces centered on point A in the vertical cross section of the outer ring and the inner ring (workpiece). The arc center point A is also the center point of the rotational vibration when the stick-shaped grindstone 3 is ground, and the grindstone 3 rotationally vibrates around the horizontal arc center line that passes through this point A and is perpendicular to the axial direction of the workpiece. .
As will be described later, this center line of the circular arc coincides with the axis of the vibrating shaft during grinding. The point B is a point separated from the point A by e on a horizontal line parallel to the work axis passing through the point A, and the whetstone 3 turns upward around the point B so that the ball trajectory does not interfere with the work. The work can be discharged away from the surfaces 1a and 2a. Point C is A when the whetstone 3 turns up
It is a transition point. As will be described later, point B is located on the outer peripheral axis of the eccentric shaft.
【０００８】図３は本発明の実施例による超仕上研削盤
用砥石振動装置の縦断面図であり、図４は図３のＤ−Ｄ
線正面断面図である。研削盤の加工テーブル上に固定さ
れた砥石台２２に中空の偏心軸１０の外周面がテーパロ
ーラ軸受１２によって回転可能に軸支されている。偏心
軸１０の内周面は該軸１０の外周面に対してｅだけ偏心
しており、この内周偏心軸線と一致して振動軸４が偏心
軸１０にアンキュラボール軸受２３を介して挿通されて
いる。振動軸４の先端（ワーク側）には側面視コ字状と
なった砥石ホルダ５が取り付けられ、この砥石ホルダの
先端に図１，図２で説明したスティック状超仕上用砥石
が取り付けられる。ワークの真上位置の砥石ホルダ上部
には前記砥石をワークの被加工周溝（実施例ではボール
軌道面）に押し付ける砥石加工シリンダ７が搭載され
る。振動軸４の後端部はクランクシャフト９を介して回
転モータ（図示省略）に連結され、該モータの一方向連
続回転により振動軸４はその軸線まわりに所定角度範囲
の高速回転振動を行うようになっている。FIG. 3 is a vertical sectional view of a grindstone vibrating device for a super finishing grinder according to an embodiment of the present invention, and FIG. 4 is a sectional view taken along line DD of FIG.
It is a line front sectional view. An outer peripheral surface of a hollow eccentric shaft 10 is rotatably supported by a tapered roller bearing 12 on a grindstone base 22 fixed on a processing table of a grinder. The inner peripheral surface of the eccentric shaft 10 is eccentric with respect to the outer peripheral surface of the shaft 10 by e, and the vibrating shaft 4 is inserted into the eccentric shaft 10 via the uncular ball bearing 23 in line with the inner peripheral eccentric axis line. ing. A grindstone holder 5 having a U-shape in a side view is attached to the tip (workpiece side) of the vibrating shaft 4, and the stick-shaped superfinishing grindstone described in FIGS. 1 and 2 is attached to the tip of the grindstone holder. A grindstone processing cylinder 7 for pressing the grindstone against a peripheral groove to be processed (ball raceway surface in the embodiment) of the work is mounted above the grindstone holder just above the work. The rear end of the vibrating shaft 4 is connected to a rotary motor (not shown) via a crankshaft 9 so that the vibrating shaft 4 can vibrate at high speed within a predetermined angular range around its axis by continuous rotation in one direction of the motor. It has become.
【０００９】図４に明示されるように偏心軸１０の下側
周部と砥石台２２の偏心軸挿入孔部との間に両部材の周
面と密着する偏心軸クランプ受台１３が設けられ、この
クランプ受台１３に対向するように砥石台２２の上部に
偏心軸クランプ装置２５が設けられている。偏心軸クラ
ンプ装置２５は砥石台２２上部に固定されたクランプシ
リンダ１５と、クランプシリンダ１５内を油圧力で上下
に移動するクランプピストン１６と、クランプピストン
１６の下端と偏心軸１０の上側周部との間に介在された
クランプスペーサ１４とを有し、シリンダ室２６内への
油圧力導入によりクランプスペーサ１４を介して偏心軸
１０がクランプ受台１３に押圧されて偏心軸１０のクラ
ンプがなされるようになっている。クランプスペーサ１
４の偏心軸軸方向両端部にはクランプスペーサ回り止め
用のピン２４が突出し、該ピン２４の先端が偏心軸１０
を軸支するテーパローラ軸受１２のシール装置２７と対
峙している（図３）。なおクランプシリンダ１５の上端
板とクランプピストン１６との間にはクランプピストン
１６を常時クランプスペーサ１４を偏心軸１０に軽く押
し付ける作用をする圧縮ばね１７が設けられている。図
３に示すように偏心軸１０と振動軸４との間および偏心
軸１０と砥石台２２との間にはシール装置２８，２９が
設けられ、これによって本砥石振動装置の回転部は完全
防塵構造とされている。As clearly shown in FIG. 4, an eccentric shaft clamp support 13 is provided between the lower peripheral portion of the eccentric shaft 10 and the eccentric shaft insertion hole of the grindstone base 22 so as to be in close contact with the peripheral surfaces of both members. An eccentric shaft clamp device 25 is provided above the grindstone base 22 so as to face the clamp receiving base 13. The eccentric shaft clamp device 25 includes a clamp cylinder 15 fixed to an upper part of the grindstone 22, a clamp piston 16 that moves up and down in the clamp cylinder 15 by hydraulic pressure, a lower end of the clamp piston 16 and an upper peripheral portion of the eccentric shaft 10. And the clamp spacer 14 interposed between the eccentric shaft 10 and the eccentric shaft 10 is pressed by the clamp receiving base 13 via the clamp spacer 14 by the introduction of hydraulic pressure into the cylinder chamber 26. It is like this. Clamp spacer 1
4, a pin 24 for preventing the clamp spacer from rotating protrudes at both ends of the eccentric shaft 10 in the axial direction, and the tip of the pin 24 has an eccentric shaft 10
It faces the sealing device 27 of the taper roller bearing 12 which axially supports (FIG. 3). A compression spring 17 is provided between the upper end plate of the clamp cylinder 15 and the clamp piston 16 to keep the clamp piston 16 lightly pressing the clamp spacer 14 against the eccentric shaft 10. As shown in FIG. 3, sealing devices 28 and 29 are provided between the eccentric shaft 10 and the vibrating shaft 4 and between the eccentric shaft 10 and the grindstone base 22, so that the rotating portion of the present grindstone vibrating device is completely dustproof. It is considered as a structure.
【００１０】図１および図５を参照すれば、偏心軸１０
の後端部に環状の偏心軸旋回用平歯車１１がボルトによ
って固着され、またこの平歯車１１の両側の砥石台部分
に一対の偏心軸旋回用シリンダ３０，３１が設けられて
いる。前記平歯車１１はその両側部が部分的に各シリン
ダ３０，３１内に入り込み，各シリンダ３０，３１内の
ラックピストン１８，１９と噛み合うようになってい
る。ラックピストン１８と１９はそれらのシリンダ３
０，３１にもたらされる油（空）圧力により互いに反対
方向に同時移動し、これによって平歯車１１，したがっ
て偏心軸１０は時計方向あるいは反時計方向に偏心軸外
周軸線まわりに旋回する。偏心軸１０のこのような旋回
動により該偏心軸１０に偏心保持された振動軸４および
砥石ホルダ５は図１，図２で既に説明したように偏心軸
外周軸線のまわりに、つまり図１，図２のＢ点のまわり
に円弧状の上下動作を行う。例えば振動軸４を上昇旋回
させるときはシリンダ３０のポートＦおよびシリンダ３
１のポートＧに油（空）圧を送り、この状態から下降旋
回させるときはシリンダ３０のポートＥ，シリンダ３１
のポートＨに油（空）圧を導入する。なお偏心軸１０の
０点調整はシリンダ３０の上端に設けた０点調整用ボル
ト２０で行い、旋回角度の調整は他方のシリンダ３１の
上端の旋回角度調整ボルト２１で行うようになってい
る。Referring to FIGS. 1 and 5, the eccentric shaft 10
An annular eccentric shaft turning spur gear 11 is fixed to the rear end of the spur gear 11 by bolts, and a pair of eccentric shaft turning cylinders 30 and 31 are provided on the grindstone portions on both sides of the spur gear 11. Both side portions of the spur gear 11 partially enter the cylinders 30 and 31, and mesh with the rack pistons 18 and 19 in the cylinders 30 and 31, respectively. The rack pistons 18 and 19 are their cylinder 3
The oil (pneumatic) pressures applied to 0 and 31 simultaneously move in opposite directions, whereby the spur gear 11, and thus the eccentric shaft 10, pivots clockwise or counterclockwise around the eccentric shaft outer peripheral axis. The oscillating shaft 4 and the grindstone holder 5 which are eccentrically held by the eccentric shaft 10 by such pivotal movement of the eccentric shaft 10 are arranged around the eccentric shaft outer peripheral axis, that is, as shown in FIGS. A circular arc-shaped vertical movement is performed around point B in FIG. For example, when turning the vibration shaft 4 upward, the port F of the cylinder 30 and the cylinder 3
When hydraulic (pneumatic) pressure is sent to the port G of No. 1 and is made to turn downward from this state, the port E of the cylinder 30 and the cylinder 31
Oil (pneumatic) pressure is introduced into port H of. The zero point adjustment of the eccentric shaft 10 is performed by the zero point adjustment bolt 20 provided at the upper end of the cylinder 30, and the turning angle is adjusted by the turning angle adjustment bolt 21 at the upper end of the other cylinder 31.
【００１１】軸受外輪あるいは内輪のボール軌道面の超
仕上加工を行うときは偏心軸１０をクランプ装置２５の
油（空）圧力によって砥石台２２にクランプするととも
に振動軸４を前記Ａ点上で回転振動させ、かつ主軸に保
持したワークの外輪または内輪を軸芯まわりに回転させ
て研削する。研削後ワークを排出するときは偏心軸１０
のクランプを解除し、上述した偏心軸旋回用シリンダ３
０，３１により偏心軸１０を例えば１０゜〜１５゜旋回
させることで砥石３が上昇旋回してボール軌道面から逃
げ、これによってワークの排出あるいは次のワークの装
填が可能となる。ワーク装填後は砥石は逆に下降旋回し
てボール軌道面に接触し、次の加工動作に入る。ここで
偏心軸外周軸線に対する振動軸４の偏心量および偏心軸
の外周軸芯位置は、偏心軸１０が旋回したとき砥石とボ
ール軌道面が干渉しない偏心量および軸芯位置であれば
特に限定されない。図示実施例のワークの場合は、偏心
軸１０の外周軸芯位置がワークのボール軌道面の縦断面
上における円弧中心点Ａを含む水平平面Ｌ上またはこれ
より高い位置にあるとき砥石と前記ボール軌道面とが干
渉せずに砥石を逃がすことができる。When superfinishing the ball raceway of the outer ring or the inner ring of the bearing, the eccentric shaft 10 is clamped on the wheel head 22 by the hydraulic (pneumatic) pressure of the clamp device 25, and the vibration shaft 4 is rotated at the point A. The outer ring or the inner ring of the work which is vibrated and held on the main shaft is rotated about the shaft center for grinding. When discharging the work after grinding, eccentric shaft 10
The eccentric shaft turning cylinder 3 described above is released from the clamp
By turning the eccentric shaft 10 by 0, 31, for example, 10 ° to 15 °, the grindstone 3 ascends and moves away from the ball raceway surface, whereby the work can be discharged or the next work can be loaded. After the work is loaded, the grindstone, on the contrary, descends and turns to contact the ball raceway surface to start the next machining operation. Here, the eccentric amount of the vibration shaft 4 with respect to the eccentric shaft outer peripheral axis and the outer peripheral shaft center position of the eccentric shaft are not particularly limited as long as the eccentric amount and the shaft center position do not interfere with the grindstone and the ball raceway surface when the eccentric shaft 10 turns. . In the case of the workpiece of the illustrated embodiment, when the outer peripheral axis of the eccentric shaft 10 is located on a horizontal plane L including the arc center point A on the vertical section of the ball raceway surface of the workpiece or at a position higher than the horizontal plane L, the grindstone and the ball The grindstone can be released without interfering with the raceway surface.
【００１２】上述の実施例では偏心軸１０をころがり軸
受で砥石台２２に軸支するようにしたが、これ以外に例
えば偏心軸１０を静圧軸受でスラスト，ラジアル方向に
ついて支持し、該偏心軸の回転で振動軸４を円弧で上
昇，下降させるようにしてもよい。In the above embodiment, the eccentric shaft 10 is rotatably supported by the grindstone base 22. However, in addition to this, for example, the eccentric shaft 10 is supported by the static pressure bearing in the thrust and radial directions, and the eccentric shaft 10 is supported. It is also possible to raise and lower the vibration shaft 4 in an arc by rotating.
【００１３】[0013]
【発明の効果】以上説明したように本発明によれば、振
動軸のみに砥石加圧シリンダを取り付け、砥石をワーク
から離すための砥石上下動シリンダを砥石台の固定側に
設置したので、振動軸の回転振動は極低イナーシャとな
り、したがって高速振動が可能となり、加工能率を格段
に上げることができる。振動軸先端の砥石ホルダ，砥石
および砥石加圧シリンダ等は軽量にすることが容易で極
低イナーシャ化の支障とはならない。スティック状砥石
を上下動させる機構は偏心軸を中心とした旋回動作であ
るため、その軸支部のシールが容易であり、完全防塵を
達成できる。また砥石の上下動シリンダは固定設置であ
るため該シリンダに連結される油（空）圧ホースは揺動
せず寿命低下や破損をもたらさず、場合によっては剛体
管としてもよく、メンテナンスフリーとすることも可能
である。装置全体もきわめてコンパクトとなり、加工サ
イクルタイムの短縮とともに低コスト化を達成できる等
の効果がある。なお、加工動作時には偏心軸は油（空）
圧力でクランプするので偏心軸に組み込まれる振動軸の
ころがり軸受のフレッティングは起らない。As described above, according to the present invention, since the grindstone pressurizing cylinder is attached only to the vibrating shaft and the grindstone vertically moving cylinder for separating the grindstone from the work is installed on the fixed side of the grindstone base, Rotational vibration of the shaft has extremely low inertia, so high-speed vibration is possible, and the machining efficiency can be significantly increased. The grindstone holder, grindstone, and grindstone pressurizing cylinder at the tip of the vibration shaft can easily be made lightweight, which does not hinder ultra-low inertia. Since the mechanism for moving the stick-shaped grindstone up and down is a turning motion about the eccentric shaft, the shaft support can be easily sealed, and complete dustproofing can be achieved. Further, since the vertical moving cylinder of the grindstone is fixedly installed, the hydraulic (pneumatic) hose connected to the cylinder does not swing and thus does not cause a decrease in service life or damage. In some cases, it may be a rigid pipe and is maintenance-free. It is also possible. The entire device is also extremely compact, which has the effects of shortening the processing cycle time and achieving cost reduction. The eccentric shaft is oil (empty) during the machining operation.
Since it is clamped by pressure, fretting of the rolling bearing of the vibrating shaft incorporated in the eccentric shaft does not occur.
【図１】軸受外輪の超仕上加工におけるボール軌道面と
砥石との接離状態を示した縦断面図である。FIG. 1 is a vertical cross-sectional view showing a contacting / separating state between a ball raceway surface and a grindstone in superfinishing of a bearing outer ring.
【図２】軸受内輪の超仕上加工におけるボール軌道面と
砥石との接離状態を示した縦断面図である。FIG. 2 is a vertical cross-sectional view showing a contacting / separating state of a ball raceway surface and a grindstone in superfinishing of an inner race of a bearing.
【図３】本発明の実施例による超仕上研削盤用砥石振動
装置の縦断面図である。FIG. 3 is a vertical sectional view of a grindstone vibrating device for a super finishing grinder according to an embodiment of the present invention.
【図４】図３のＤ−Ｄ線に沿った正面断面図である。FIG. 4 is a front sectional view taken along the line DD of FIG.
【図５】本発明の実施例による偏心軸旋回駆動機構の縦
断面図である。FIG. 5 is a vertical sectional view of an eccentric shaft turning drive mechanism according to an embodiment of the present invention.
１ 軸受外輪 ２ 軸受内輪 ３ スティック状砥石 ４ 振動軸 ５ 砥石ホルダ ７ 砥石加圧シリンダ １０ 偏心軸 １１ 偏心軸旋回用平歯車 １３ 偏心軸クランプ受台 １４ クランプスペーサ １５ クランプシリンダ １６ クランプピストン １８，１９ ラックピストン ２２ 砥石台 ３０，３１ 偏心軸旋回用シリンダ 1 Bearing outer ring 2 bearing inner ring 3 Stick-shaped grindstone 4 vibration axes 5 grindstone holder 7 Grinding stone pressure cylinder 10 eccentric shaft 11 Spur gear for eccentric shaft rotation 13 Eccentric shaft clamp pedestal 14 Clamp spacer 15 Clamp cylinder 16 Clamp piston 18,19 Rack piston 22 Whetstone stand 30, 31 Eccentric shaft turning cylinder
Claims (4)
該偏心軸をその外周軸線のまわりに旋回させる偏心軸旋
回駆動機構と、前記偏心軸に該偏心軸の内周軸線と同芯
に回転可能に挿通されかつ先端に砥石ホルダが固着され
た振動軸と、該振動軸に連結され該振動軸をその軸線ま
わりに回転振動させる振動軸駆動機構とを有し、前記振
動軸はその軸線がワークの被加工周面溝の縦断面上の円
弧中心線と一致するように配置されることを特徴とする
超仕上研削盤用砥石振動装置。1. An eccentric shaft rotatably supported by a wheel head,
An eccentric shaft turning drive mechanism for turning the eccentric shaft around its outer peripheral axis, and a vibrating shaft rotatably inserted through the eccentric shaft concentrically with the inner peripheral axis of the eccentric shaft and having a grindstone holder fixed to the tip thereof. And a vibrating shaft drive mechanism that is connected to the vibrating shaft and vibrates the vibrating shaft about its axis. The vibrating shaft has an axis line that is an arc center line on a vertical cross section of a peripheral groove of a workpiece. A grindstone vibrating device for a super finishing grinder, which is arranged so as to match with.
ホルダ上に砥石加圧シリンダが保持されることを特徴と
する請求項第１項記載の超仕上研削盤用砥石振動装置。2. A grindstone vibrating device for a super finishing grinder according to claim 1, wherein a grindstone pressurizing cylinder is held on a grindstone holder of said vibrating shaft on a vertical center line of a work.
部を径方向に押圧するクランプシリンダを有することを
特徴とする請求項第１項または第２項記載の超仕上研削
盤用砥石振動装置。3. A grindstone for a super finishing grinder according to claim 1 or 2, further comprising a clamp cylinder which is held on the grindstone base and radially presses a peripheral portion of the eccentric shaft. Vibration device.
面溝の前記円弧中心線を含む水平面上またはそれより上
方位置に存するように配置されることを特徴とする請求
項第１項ないし第３項記載の超仕上研削盤用砥石振動装
置。4. The eccentric shaft is arranged such that an outer peripheral axis thereof is located on a horizontal plane including the arc center line of the peripheral groove to be processed or at a position higher than the horizontal plane. Thru | or the grindstone vibrating device for superfinishing grinders of Claim 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20634591A JP3079666B2 (en) | 1991-07-23 | 1991-07-23 | Grinding wheel vibration device for super finishing grinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20634591A JP3079666B2 (en) | 1991-07-23 | 1991-07-23 | Grinding wheel vibration device for super finishing grinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0531665A true JPH0531665A (en) | 1993-02-09 |
| JP3079666B2 JP3079666B2 (en) | 2000-08-21 |
Family
ID=16521768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20634591A Expired - Lifetime JP3079666B2 (en) | 1991-07-23 | 1991-07-23 | Grinding wheel vibration device for super finishing grinder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3079666B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002233940A (en) * | 2001-02-02 | 2002-08-20 | Koyo Seiko Co Ltd | Superfinishing apparatus |
| CN107363657A (en) * | 2017-08-17 | 2017-11-21 | 宜兴市鼎锋模具制造有限公司 | A kind of endoporus precise finiss head |
| CN107378746A (en) * | 2017-08-14 | 2017-11-24 | 瓦房店远东轴承股份有限公司 | Raceway Superfinishing machine in a kind of self-aligning thrust roller bearing |
-
1991
- 1991-07-23 JP JP20634591A patent/JP3079666B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002233940A (en) * | 2001-02-02 | 2002-08-20 | Koyo Seiko Co Ltd | Superfinishing apparatus |
| CN107378746A (en) * | 2017-08-14 | 2017-11-24 | 瓦房店远东轴承股份有限公司 | Raceway Superfinishing machine in a kind of self-aligning thrust roller bearing |
| CN107363657A (en) * | 2017-08-17 | 2017-11-21 | 宜兴市鼎锋模具制造有限公司 | A kind of endoporus precise finiss head |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3079666B2 (en) | 2000-08-21 |
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