JP2834016B2 - Whetstone with centering mechanism - Google Patents
Whetstone with centering mechanismInfo
- Publication number
- JP2834016B2 JP2834016B2 JP481895A JP481895A JP2834016B2 JP 2834016 B2 JP2834016 B2 JP 2834016B2 JP 481895 A JP481895 A JP 481895A JP 481895 A JP481895 A JP 481895A JP 2834016 B2 JP2834016 B2 JP 2834016B2
- Authority
- JP
- Japan
- Prior art keywords
- hole
- centering
- peripheral surface
- grindstone
- inner peripheral
- 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
Links
Landscapes
- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Description
【0001】[0001]
【産業上の利用分野】本発明は、芯出し機構を備えた砥
石に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grindstone provided with a centering mechanism.
【0002】[0002]
【従来の技術】加工装置の回転軸に嵌め着けられて使用
される円板状或いはカップ状等の砥石は、一般に、フラ
ンジ状を成す一方の部材の中央に突設された円筒部に砥
石の中央部に形成された貫通穴を嵌合させ、且つ他方の
フランジ状の部材との間でその砥石の中央部を挟圧する
砥石固定装置により、その回転軸に嵌め着けられる。こ
の砥石を嵌め着けるに際しては、その振動を抑制すると
共に高い加工精度を得るために、特に高精度の研磨加工
や高速回転駆動を行う場合には、相互の軸心が一致させ
られることが望まれる。2. Description of the Related Art Generally, a disc-shaped or cup-shaped grindstone which is used by being fitted to a rotating shaft of a processing apparatus is provided on a cylindrical portion protruding from the center of one of the flange-shaped members. The grindstone is fixed to the rotary shaft by a grindstone fixing device that fits a through hole formed in the central part and presses the central part of the grindstone with the other flange-shaped member. When fitting the grindstone, in order to suppress the vibration and obtain high processing accuracy, it is desired that the axes of the two wheels coincide with each other, particularly when performing high-precision polishing or high-speed rotation drive. .
【0003】ところで、一般に、上記加工装置の回転軸
は、先端に向かうに従って直径が小さくなるテーパ状部
が形成される一方、上記砥石固定装置を構成する一対の
部材のうちの一方の部材はそのテーパ状部に嵌合させら
れるテーパ穴を有しているものが用いられるため、この
一方の部材は単に回転軸に嵌合させるのみで、その軸心
が回転軸と一致させられるようになっている。一方、砥
石は、上記一方の部材の中央部に回転軸の先端側に向か
って形成された円筒部に、前記貫通穴において遊び嵌合
により嵌め着けられた状態で他方の部材との間で挟圧さ
れることにより取り付けられる。しかし、この貫通穴と
円筒部との間には、遊び嵌合の隙間に貫通穴の公差に基
づく隙間が加えられるため、必ずしも砥石の軸心は回転
軸と一致させられない。そのため、例えば円板状の外周
面で加工を行う砥石においては、取り付けた後にツルー
イングを行って外周面の中心を軸心に一致させたり、或
いは、回転軸へ仮止めしてハンマ等で砥石を叩いて取付
位置を修正すること等が行われていた。しかしながら、
前者の方法では砥石のムダが生じて、特にダイヤモンド
砥粒やCBN砥粒等の高価な砥粒が用いられている砥石
では大きな損失が生じる。また、後者の方法では、作業
者の勘に頼って芯出しが行われることから時間を要する
と共に高い精度で芯出しを行うことが困難であった。In general, the rotating shaft of the processing device has a tapered portion whose diameter decreases toward the tip, while one of a pair of members constituting the grinding wheel fixing device has one of the following members. Since a member having a tapered hole to be fitted to the tapered portion is used, this one member is merely fitted to the rotating shaft, and the axis of the member is made to coincide with the rotating shaft. I have. On the other hand, the whetstone is sandwiched between the other member in a state in which the whetstone is fitted in the through-hole by play fitting in a cylindrical portion formed at the center of the one member toward the tip end of the rotating shaft. It is attached by being pressed. However, between the through hole and the cylindrical portion, a gap based on the tolerance of the through hole is added to the clearance of the play fit, so that the axis of the grindstone does not always coincide with the rotation axis. For this reason, for example, in the case of a grinding wheel that performs processing on a disk-shaped outer peripheral surface, truing is performed after installation, and the center of the outer peripheral surface is aligned with the axis, or the grinding wheel is temporarily fixed to the rotating shaft and the hammer etc. Hitting was used to correct the mounting position. However,
In the former method, the grinding stone is wasted, and a large loss occurs particularly in a grinding stone using expensive abrasive grains such as diamond abrasive grains and CBN abrasive grains. In the latter method, since centering is performed depending on the intuition of the operator, it takes time and it is difficult to perform centering with high accuracy.
【0004】[0004]
【発明が解決すべき課題】そこで、上記の芯出しを簡単
且つ確実に行うため、従来から種々の提案が為されてい
る。例えば、実開昭56−98559号,特公平2
−8867号公報(特開昭61−68280号),特
開平1−216775号公報,特開平5−21267
2号公報に開示されているもの等がそれである。上記
の技術は、前記一方の部材の円筒部と砥石との間に、ね
じ込み楔の進入により半径方向に張り出して砥石の内周
面を押圧する調芯部材を、周方向に所定の間隔で例えば
3箇所以上に設けたものである。この技術によれば、砥
石を一方の部材に仮締めした状態で回転軸回りに回転さ
せつつ、例えばその外周面にダイヤルゲージを当てるこ
とにより検出される外周面の振れに応じて、複数のねじ
込み楔をそれぞれ所定量ねじ込むことで芯出しを行うこ
とができる。Therefore, various proposals have been hitherto made to easily and surely perform the above-mentioned centering. For example, Japanese Utility Model Publication No. 56-98559, Tokuhei 2
-8867 (JP-A-61-68280), JP-A-1-216775, JP-A-5-21267
This is the one disclosed in Japanese Patent Publication No. 2 (1994). The above-mentioned technique, between the cylindrical portion of the one member and the grindstone, a centering member that projects radially by pressing a screw wedge and presses the inner peripheral surface of the grindstone, at a predetermined interval in the circumferential direction, for example, It is provided at three or more places. According to this technique, while rotating the grindstone around the rotation axis in a state where the grindstone is temporarily fastened to one of the members, a plurality of screwing-in operations are performed, for example, in accordance with the deflection of the outer peripheral surface detected by applying a dial gauge to the outer peripheral surface. Centering can be performed by screwing the wedges by a predetermined amount.
【0005】また、上記の技術は、前記一方の部材の
円筒部と同様な外周面を備えた型部材に砥石を固定し、
その砥石の外周面にダイヤルインジケータを接触させつ
つ回転させて芯出しした後、型部材の外周面と砥石の内
周面との間にシリコーンゴムを流し込んで硬化させるこ
とにより、円筒部の外周面とと砥石の内周面との間に形
成される隙間を埋めるシムを作製するものである。この
技術によれば、その隙間を埋める高い精度のシムが得ら
れるため、砥石を一方の部材に固定するのに先立ち、シ
ムをフランジの円筒部に嵌め込むことにより、特に調整
を要することなく芯出しが行われることとなる。[0005] Further, the above-mentioned technique fixes a grindstone to a mold member having an outer peripheral surface similar to the cylindrical portion of the one member,
After rotating and centering while contacting the dial indicator on the outer peripheral surface of the grindstone, silicone rubber is poured between the outer peripheral surface of the mold member and the inner peripheral surface of the grindstone and hardened, so that the outer peripheral surface of the cylindrical portion is And a shim that fills a gap formed between the grinding wheel and the inner peripheral surface of the whetstone. According to this technique, a shim with high accuracy that fills the gap can be obtained. Therefore, prior to fixing the grindstone to one of the members, the shim is fitted into the cylindrical portion of the flange so that the core does not need to be particularly adjusted. Delivery will be performed.
【0006】また、上記の技術は、前記一方の部材の
円筒部の外周面を断面正多角形となるように形成すると
共に、その外周面と砥石の内周面との間に、径方向に移
動可能な複数の調芯部材を所定の間隔で有したリング状
部材を設け、円筒部とリング状部材とを相対回転させる
ことにより、その相対回転角度に応じて調芯部材を介し
て砥石の内周面を押圧するものである。この技術によれ
ば、上記相対回転により、全ての調芯部材が同様に外周
側に移動させられるため、極めて簡単な操作で高い精度
の芯出しを行うことができる。Further, the above-mentioned technique is to form the outer peripheral surface of the cylindrical portion of the one member so as to have a regular polygonal cross section, and to radially extend between the outer peripheral surface and the inner peripheral surface of the grindstone. By providing a ring-shaped member having a plurality of movable alignment members at predetermined intervals, and by relatively rotating the cylindrical portion and the ring-shaped member, the grindstone through the alignment member according to the relative rotation angle. It presses the inner peripheral surface. According to this technique, all the alignment members are similarly moved to the outer peripheral side by the relative rotation, so that highly accurate centering can be performed by an extremely simple operation.
【0007】また、上記の技術は、歯車研削装置に用
いられる、全体が円板状を成す基部の外周面に砥石を取
り付ける形式の砥石固定装置において、その基部の外周
面と砥石との間に、外周面に形成された環状のテーパ面
とそのテーパ面の内周側に形成された環状溝部とを有す
るリング状部材を備え、そのテーパ面の弾性力により砥
石の内周面を押圧するものである。この技術によれば、
砥石を仮止めした後に円板状の基部と砥石との間にリン
グ状部材を押し込んでネジ止めする簡単な操作で芯出し
を行うことができる。Further, the above-mentioned technique is used in a wheel grinding apparatus, in which a grinding wheel is attached to an outer peripheral surface of a base having a disk shape as a whole, wherein a grinding wheel is provided between the outer peripheral surface of the base and the grinding wheel. A ring-shaped member having an annular tapered surface formed on the outer peripheral surface and an annular groove formed on the inner peripheral side of the tapered surface, and pressing the inner peripheral surface of the grindstone by the elastic force of the tapered surface. It is. According to this technology,
After the grindstone is temporarily fixed, centering can be performed by a simple operation of pushing the ring-shaped member between the disc-shaped base and the grindstone and screwing it.
【0008】しかしながら、上記乃至の技術では、
何れにおいても砥石固定装置の少なくとも一方の部材の
加工が必要となるか、或いは多大な手間を要するという
問題があった。すなわち、の技術においては、その一
方の部材に調芯部材を固定するためのねじ穴加工が必要
となる。更に、ダイヤルゲージ等で測定を行いながら複
数のねじ込み楔を順次調整するため、手間を要すると共
に高精度の芯出しを行うためには熟練を必要とする。ま
た、の技術においては、砥石を前記一方の部材に固定
する際には単にシムを先に嵌め込むだけの操作で高精度
の芯出しが行われるものの、シムの作製に手間を要とす
ると共に、シリコーンゴムの硬化を待つためにシムの作
製に長時間を必要とする。また、の技術においては、
前記円筒部の外周面の加工が必要であり、しかも、高精
度の芯出しを行うためには、その円筒部を高精度の正多
角形に形成する必要がある。また、の技術は、砥石固
定装置の外周面に砥石を取り付ける特殊な構造を前提と
するものであり、同様な構造を前記円筒部と砥石との嵌
め合いに適用する場合には円筒部の加工が必要となる。However, in the above-mentioned techniques,
In any case, there is a problem that processing of at least one member of the grindstone fixing device is required or a great deal of labor is required. That is, in the technique described above, it is necessary to form a screw hole for fixing the alignment member to one of the members. Further, since a plurality of screw wedges are sequentially adjusted while performing measurement with a dial gauge or the like, it takes time and requires skill to perform high-precision centering. In addition, in the technique, when fixing the grindstone to the one member, high-precision centering is performed by simply fitting the shim first, but it takes time and effort to produce the shim. In addition, it takes a long time to prepare the shim to wait for the silicone rubber to cure. In the technology,
The outer peripheral surface of the cylindrical portion needs to be processed, and in order to perform high-precision centering, it is necessary to form the cylindrical portion into a high-precision regular polygon. In addition, the technique is based on the premise that a special structure for attaching a grindstone to the outer peripheral surface of a grindstone fixing device is used. When a similar structure is applied to the fitting between the cylindrical portion and the grindstone, machining of the cylindrical portion is performed. Is required.
【0009】本発明は、以上の事情を背景として為され
たものであり、その目的は、従来用いられていた砥石固
定装置をそのまま用いて高精度の芯出しが可能な芯出し
機構を備えた砥石を提供することにある。The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a centering mechanism capable of performing high-precision centering using a conventionally used grindstone fixing device as it is. To provide a whetstone.
【0010】[0010]
【課題を解決するための手段】斯かる目的を達成するた
め、本発明の要旨とするところは、軸方向に貫通する貫
通穴を中央部に備え、その貫通穴が回転軸に嵌め着けら
れて用いられる砥石であって、(a) 前記貫通穴の内周側
に設けられた雌ねじ部と、(b) 外周面に雄ねじ部を備え
て略環状を成し、前記雌ねじ部に前記貫通穴の一端から
螺合させられる締付部材と、(c) 前記回転軸の外周面に
対向する内周面を備えて前記貫通穴内に設けられ、その
締付部材と前記貫通穴との相対回転に伴って発生する軸
方向の変位に従って、その内周面の内径が縮小する方向
に弾性変形させられる芯出し部材とを、含むことにあ
る。SUMMARY OF THE INVENTION In order to achieve the above object, the gist of the present invention is to provide a through hole in the center portion penetrating in the axial direction, and the through hole is fitted to the rotating shaft. A grindstone used, (a) a female screw portion provided on the inner peripheral side of the through hole, and (b) a substantially annular shape provided with an external thread portion on an outer peripheral surface, and the female screw portion has a substantially annular shape. A fastening member screwed from one end, and (c) provided in the through-hole with an inner peripheral surface facing the outer peripheral surface of the rotating shaft, with the relative rotation of the fastening member and the through-hole. And a centering member that is elastically deformed in a direction in which the inner diameter of the inner peripheral surface is reduced in accordance with the axial displacement generated.
【0011】[0011]
【作用および発明の効果】このようにすれば、砥石に
は、貫通穴に形成された雌ねじ部と、その貫通穴の一端
から螺合させられる円環状の締付部材と、回転軸の外周
面に対向する内周面を備えて上記貫通穴内に設けられ、
締付部材と貫通穴との相対回転に伴って発生する軸方向
の変位に従ってその内周面の内径が縮小する方向に弾性
変形させられる芯出し部材とが備えられる。そのため、
この芯出し機構付砥石の芯出しは、砥石を前記砥石固定
装置の一方の部材の円筒部に嵌め着けた状態で、芯出し
部材によりその円筒部が締め付けられるまで、締付部材
と貫通穴とを相対回転させるだけの簡単な操作で為さ
れ、芯出し部材の内径が均等に縮小方向に変形させられ
ることとなるため、高精度で芯出しが為されることとな
る。しかも、締付部材と芯出し部材とは砥石の貫通穴内
に設けられているため、従来の砥石固定装置をそのまま
或いは殆ど変更することなく、砥石の中央部が挟圧され
て完全に固定される。したがって、比較的簡単な構造の
従来の砥石固定装置を用いて高精度の芯出しが可能な芯
出し機構を備えた砥石が得られるのである。In this manner, the grindstone has a female screw portion formed in the through hole, an annular fastening member screwed from one end of the through hole, and an outer peripheral surface of the rotating shaft. Provided in the through hole with an inner peripheral surface facing the
A centering member is provided which is elastically deformed in a direction in which an inner diameter of an inner peripheral surface thereof is reduced in accordance with an axial displacement generated due to a relative rotation between the fastening member and the through hole. for that reason,
The centering of the whetstone with the centering mechanism is performed in a state where the whetstone is fitted to the cylindrical portion of one of the members of the whetstone fixing device, and the tightening member and the through hole are used until the cylindrical portion is tightened by the centering member. Is performed by a simple operation of only relative rotation, and the inner diameter of the centering member is uniformly deformed in the reducing direction, so that the centering is performed with high accuracy. In addition, since the tightening member and the centering member are provided in the through holes of the grindstone, the central part of the grindstone is completely fixed by being clamped without changing the conventional grindstone fixing device as it is or with little change. . Therefore, a grindstone provided with a centering mechanism capable of high-precision centering using a conventional grindstone fixing device having a relatively simple structure can be obtained.
【0012】ここで、好適には、前記芯出し機構付砥石
において、(d) 前記締付部材は、その螺進方向側からそ
の螺進方向の反対方向に向かって小径となるテーパ状内
周面を備え、(e) 前記芯出し部材は、周方向において分
割され且つ前記螺進方向と反対方向に突き出す弾性変形
可能な複数本の爪部と、それら複数本の爪部の先端部に
形成されて前記締付部材のテーパ状内周面と摺接する摺
接面とを備え、前記貫通穴内において軸方向の移動不能
に固定されているものである。[0012] Preferably, in the grinding wheel with a centering mechanism, (d) the tightening member has a tapered inner periphery whose diameter decreases from the screwing direction side to the opposite direction of the screwing direction. (E) the centering member is formed at a plurality of elastically deformable claws that are divided in a circumferential direction and protrude in a direction opposite to the screwing direction, and formed at the distal ends of the plurality of claw portions. And a sliding contact surface that is in sliding contact with the tapered inner peripheral surface of the tightening member, and is fixed so as not to move in the axial direction in the through hole.
【0013】このようにすれば、芯出し部材が軸方向に
移動不能に備えられているため、貫通穴に螺合されてい
る締付部材とその貫通穴と相対回転に伴って発生する軸
方向の変位に従って、締付部材と芯出し部材との軸方向
の相対位置が変化させられる。このとき、締付部材が、
螺進方向の反対方向に向かって小径となるテーパ状内周
面を備えると共に、芯出し部材は、周方向に分割されて
締付部材のテーパ状内周面と摺接する摺接面が先端部に
形成された弾性変形可能な複数本の爪部を備えているた
め、両者の軸方向の相対位置の変化に応じて締付部材の
内周面が芯出し部材の外周面を内周側に押圧することと
なり、締付部材の軸方向の変位に従って芯出し部材の内
径が縮小する方向に変形させられることとなる。According to this structure, since the centering member is provided so as not to move in the axial direction, the fastening member screwed into the through hole and the axial direction generated by relative rotation with the through hole. , The axial relative position between the fastening member and the centering member is changed. At this time, the fastening member
The centering member has a tapered inner peripheral surface having a smaller diameter in a direction opposite to the screwing direction, and the centering member is divided in a circumferential direction, and a sliding contact surface that comes into sliding contact with the tapered inner peripheral surface of the tightening member has a distal end portion. The inner peripheral surface of the tightening member moves the outer peripheral surface of the centering member toward the inner peripheral side in accordance with a change in the relative position of the two members in the axial direction. As a result, the inner diameter of the centering member is reduced in accordance with the axial displacement of the fastening member.
【0014】また、好適には、前記芯出し機構付砥石に
おいて、(f) 前記貫通穴内の他端側には、その貫通穴の
一端から螺合させられる締付部材の端面と対向する環状
の端面を有する挟圧部材が固定され、(g) 前記芯出し部
材は、それら締付部材の端面と挟圧部材の端面との間で
挟圧されることにより内周側へ膨出して内径を縮小する
厚肉円筒状の弾性部材である。このようにすれば、貫通
穴の他端側に締付部材の端面と対向する挟圧部材が固定
されている一方、芯出し部材が厚肉円筒状の弾性部材か
ら構成されるため、締付部材が貫通穴との相対回転に従
って軸方向に変位させられると、それら締付部材と挟圧
部材との間に備えられている芯出し部材は、両部材の間
で挟圧されることにより弾性変形させられて内周側へ膨
出して内径を縮小することとなる。[0014] Preferably, in the grinding wheel with a centering mechanism, (f) the other end of the through hole has an annular face opposed to an end face of a fastening member screwed from one end of the through hole. A clamping member having an end surface is fixed, and (g) the centering member bulges inward by being clamped between the end surface of the tightening member and the end surface of the clamping member to reduce the inner diameter. It is a thick cylindrical elastic member that shrinks. With this configuration, the clamping member facing the end surface of the fastening member is fixed to the other end side of the through hole, while the centering member is formed of the thick cylindrical elastic member. When the member is displaced in the axial direction according to the relative rotation with the through hole, the centering member provided between the tightening member and the pressing member is elastically compressed by being pressed between the two members. It is deformed and swells inward to reduce the inner diameter.
【0015】また、好適には、前記芯出し機構付砥石に
おいて、(h) 前記貫通穴内の他端側には、その貫通穴の
一端から螺合させられる締付部材の端面と対向する環状
の端面を有する挟圧部材が固定され、(i) 前記芯出し部
材は、それら締付部材の端面と挟圧部材の端面との間で
挟圧されることにより内径を縮小される皿状ばねであ
る。このようにすれば、芯出し部材が皿状ばねから構成
されているため、上記の芯出し部材が厚肉円筒状の弾性
部材から構成される場合と同様に、締付部材が貫通穴と
の相対回転に従って軸方向に変位させられると、それら
締付部材と挟圧部材との間に備えられている芯出し部材
は、両部材の間で挟圧されることにより弾性変形させら
れて内径を縮小することとなる。[0015] Preferably, in the grinding wheel with a centering mechanism, (h) the other end of the through hole has an annular shape opposed to an end surface of a fastening member screwed from one end of the through hole. A clamping member having an end surface is fixed, and (i) the centering member is a disc-shaped spring whose inner diameter is reduced by being clamped between an end surface of the tightening member and an end surface of the clamping member. is there. According to this configuration, since the centering member is formed of the disc-shaped spring, the fastening member is provided with the through hole as in the case where the centering member is formed of the thick cylindrical elastic member. When displaced in the axial direction according to the relative rotation, the centering member provided between the tightening member and the pressing member is elastically deformed by being pressed between the two members, and the inner diameter is reduced. Will be reduced.
【0016】[0016]
【実施例】以下、本発明の一実施例を図面を参照して説
明する。An embodiment of the present invention will be described below with reference to the drawings.
【0017】(第1実施例)図1は、本発明の芯出し機
構付砥石(以下、砥石という)10が、図示しない研削
盤等の回転軸12に取り付けられている状態を示す図で
あり、下側半分はその回転軸12の軸心を通る断面を示
している。砥石10は全体が円板状を成しており、一対
の固定フランジ14,移動フランジ16に狭持された状
態で上記回転軸12に取り付けられている。本実施例に
おいては、これら固定フランジ14および移動フランジ
16が砥石固定装置を構成する。(First Embodiment) FIG. 1 is a view showing a state in which a grindstone with a centering mechanism (hereinafter referred to as a grindstone) 10 of the present invention is mounted on a rotating shaft 12 such as a grinder (not shown). , The lower half shows a cross section passing through the axis of the rotating shaft 12. The whole grindstone 10 has a disk shape, and is attached to the rotating shaft 12 while being held between a pair of fixed flanges 14 and a movable flange 16. In the present embodiment, the fixing flange 14 and the moving flange 16 constitute a grindstone fixing device.
【0018】上記回転軸12には、先端部に向かうに従
って直径が小さくされるテーパ部18が備えられてお
り、そのテーパ部18にはその先端部から雌ねじ穴20
が設けられている。また、固定フランジ14は、直径が
砥石10よりも小さくされて円板状を成す大径部22
と、砥石10よりも小さい軸方向長さとその大径部22
よりも十分小さい直径とを有してその大径部22に続い
て形成された第1円筒部23と、その第1円筒部23よ
りも十分に小さい直径を有し且つ内径側に雌ねじ部24
を設けられてその第1円筒部23に続いて形成された第
2円筒部25と、上記回転軸12のテーパ部18に嵌合
させられるテーパ状の貫通穴26とを備えている。ま
た、移動フランジ16は、上記大径部22と同様な直径
を有して円板状を成し、中央部に上記第2円筒部25と
嵌合させられる貫通穴28を備えている。The rotary shaft 12 is provided with a tapered portion 18 whose diameter is reduced toward the distal end. The tapered portion 18 has a female screw hole 20 from its distal end.
Is provided. In addition, the fixed flange 14 has a diameter smaller than that of the grindstone 10 and a large-diameter portion 22 having a disc shape.
And an axial length smaller than the grindstone 10 and its large diameter portion 22
A first cylindrical portion 23 having a diameter sufficiently smaller than the large diameter portion 22 and having a diameter sufficiently smaller than the first cylindrical portion 23 and having a female screw portion 24 on the inner diameter side;
And a second cylindrical portion 25 formed following the first cylindrical portion 23 and a tapered through hole 26 fitted into the tapered portion 18 of the rotary shaft 12. The moving flange 16 has a diameter similar to that of the large-diameter portion 22, has a disk shape, and has a through hole 28 at the center thereof to be fitted with the second cylindrical portion 25.
【0019】一方、前記砥石10は、中央部に上記第1
円筒部23の外径よりも大きい内径の貫通穴30を有し
て、例えばS45C調質鋼から成る台金本体32と、例
えばダイヤモンド或いはCBN(立方晶系窒化ホウ素)
等の砥粒が樹脂,無機質,金属,メッキ等の結合剤によ
り結合されてその外周面に固着された砥粒層33とを備
えた所謂超砥粒砥石である。上記台金本体32の貫通穴
30の内周側には、上記固定フランジ14の大径部22
側の端部からその貫通穴30の軸方向略中間部までの範
囲で左ネジの雌ねじ部34が形成されており、その雌ね
じ部34には、同様にS45C調質鋼から成り、外周面
に雄ねじ部36が設けられた略環状の締付部材38が、
貫通穴30の一端すなわち移動フランジ16側から螺合
されている。On the other hand, the grinding wheel 10 has the first
It has a through-hole 30 having an inner diameter larger than the outer diameter of the cylindrical portion 23, and a base body 32 made of, for example, S45C tempered steel, and, for example, diamond or CBN (cubic boron nitride).
Is a so-called superabrasive grindstone provided with an abrasive grain layer 33 fixed to the outer peripheral surface thereof by bonding abrasive grains such as resin, inorganic material, metal, and plating. On the inner peripheral side of the through hole 30 of the base metal body 32, the large-diameter portion 22
A female screw portion 34 of a left-hand thread is formed in a range from the end on the side to the substantially middle portion in the axial direction of the through hole 30. The female screw portion 34 is similarly made of S45C tempered steel, and has an outer peripheral surface. A substantially annular fastening member 38 provided with the external thread portion 36 is
The through hole 30 is screwed from one end, that is, from the moving flange 16 side.
【0020】上記締付部材38の雄ねじ部36は、締付
部材38の上記大径部22側に位置する端部から軸方向
略中間部までの範囲で形成されている。また、締付部材
38の内周面には、移動フランジ16側の端部から軸方
向略中間部までの範囲すなわち上記雄ねじ部36が形成
されていない範囲で形成され、その端部から軸方向に離
隔するに従って内径が大きくされるテーパ面40(すな
わち、螺進方向側からその反対方向に向かって小径とな
るテーパ状の内周面)が形成されている。このテーパ面
40は軸方向に対する傾き角度θが例えば約10°に形
成されている。また、締付部材38の移動フランジ16
側の端面には、上記テーパ面40の軸方向長さと略同様
な深さとされた係合穴42が、図2に示すように例えば
周方向に等間隔で8箇所に設けられている。この係合穴
42は、後述するように締付部材38を回転させる際に
工具56の爪58を引っかけるためのものである。な
お、図2は、砥石10のみを図1における移動フランジ
16側から見た状態を左半分について示す図である。The male screw portion 36 of the tightening member 38 is formed in a range from the end of the tightening member 38 located on the large-diameter portion 22 side to a substantially middle portion in the axial direction. The inner peripheral surface of the fastening member 38 is formed in a range from the end on the moving flange 16 side to a substantially middle portion in the axial direction, that is, a range in which the male screw portion 36 is not formed. The tapered surface 40 whose inner diameter increases as the distance from the inner surface increases (that is, a tapered inner peripheral surface whose diameter decreases from the screwing direction side toward the opposite direction) is formed. The taper surface 40 has an inclination angle θ with respect to the axial direction of, for example, about 10 °. In addition, the moving flange 16 of the fastening member 38
On the side end surface, engagement holes 42 having a depth substantially the same as the axial length of the tapered surface 40 are provided at eight locations, for example, at equal intervals in the circumferential direction as shown in FIG. The engagement hole 42 is used to catch a claw 58 of the tool 56 when rotating the fastening member 38 as described later. FIG. 2 is a view showing the left half of a state in which only the grindstone 10 is viewed from the moving flange 16 side in FIG.
【0021】一方、前記台金本体32の大径部22側に
位置する一面の内周側部分には、比較的浅い段付部44
が設けられている。この段付部44には、例えばS45
C調質鋼から成り大径部22側に位置する端部に鍔部4
6を有する芯出し部材48が、その鍔部46の外周側部
分において、ねじ49により例えば周方向に等間隔で1
2箇所ねじ止めされることにより台金本体32に固定さ
れている。この芯出し部材48には、上記鍔部46の内
周側端部から移動フランジ16側(すなわち、締付部材
38の螺進方向と反対方向)に向かう弾性変形可能な多
数本(本実施例においては、24本)の爪部50が、図
2に示すように例えば周方向に等間隔で分割されて立設
されている。On the other hand, a relatively shallow stepped portion 44 is provided on the inner peripheral portion of one surface located on the large diameter portion 22 side of the base metal main body 32.
Is provided. For example, S45
A flange 4 is formed at the end located on the large-diameter portion 22 side, which is made of C-tempered steel.
The centering member 48 having an outer peripheral portion 6 is provided with a screw 49 at an outer peripheral portion of the flange portion 46 at regular intervals in the circumferential direction, for example.
It is fixed to the base metal body 32 by being screwed at two places. The centering member 48 has a large number of elastically deformable pieces (in the present embodiment) directed from the inner peripheral end of the flange 46 to the moving flange 16 side (that is, the direction opposite to the screwing direction of the tightening member 38). In FIG. 2, 24) claw portions 50 are erected at equal intervals in the circumferential direction, for example, as shown in FIG.
【0022】上記の多数本の爪部50は、その先端部に
上記締付部材38のテーパ面40とは反対方向に同様な
傾き角度(約10°)に形成されて、そのテーパ面40
と摺接させられるテーパ面52を外周面に備えると共
に、軸方向に平行な内周面54を備えており、その高さ
は台金本体32と同様とされている。なお、上記テーパ
面52は移動フランジ16側の端部から芯出し部材48
の軸方向略中間部までの範囲に形成されている。本実施
例においては、上記締付部材38および芯出し部材48
によって芯出し機構が構成されており、上記テーパ面5
2が摺接面に相当し、回転軸12の外周面に対向する芯
出し部材48の内周面は、上記多数本の爪部50の内周
面54によって形成されている。なお、芯出し部材48
は、鍔部46が台金本体32の端面に取り付けられてい
るが、爪部50は貫通穴30の内周側に位置させられて
おり、実質的に貫通穴30内に設けられている。また、
本実施例においては、芯出し部材48の爪部50の高さ
が台金本体32の厚み寸法と略同様にされると共に、図
1に示されるように締付部材38が、螺合状態において
その移動フランジ14側の端面が台金本体32の端面か
ら突き出さないように構成されており、砥石10の厚み
寸法内に芯出し機構が設けられている。The plurality of claws 50 are formed at their tip portions at the same inclination angle (about 10 °) in the direction opposite to the tapered surface 40 of the tightening member 38, and the tapered surface 40 is formed.
The outer peripheral surface is provided with a tapered surface 52 which is slidably contacted with the inner peripheral surface 54. The inner peripheral surface 54 is provided in parallel with the axial direction. In addition, the tapered surface 52 is provided with the centering member 48 from the end on the moving flange 16 side.
Is formed in a range up to a substantially intermediate portion in the axial direction. In this embodiment, the tightening member 38 and the centering member 48 are used.
A centering mechanism is constituted by the tapered surface 5.
2 corresponds to the sliding surface, and the inner peripheral surface of the centering member 48 facing the outer peripheral surface of the rotating shaft 12 is formed by the inner peripheral surface 54 of the large number of claws 50. The centering member 48
Although the flange 46 is attached to the end face of the base metal body 32, the claw 50 is located on the inner peripheral side of the through hole 30, and is substantially provided in the through hole 30. Also,
In the present embodiment, the height of the claw portion 50 of the centering member 48 is made substantially the same as the thickness dimension of the base metal body 32, and as shown in FIG. The end face on the side of the moving flange 14 is configured not to protrude from the end face of the base metal body 32, and a centering mechanism is provided within the thickness dimension of the grindstone 10.
【0023】以上のように構成された砥石10を研削盤
の回転軸12に取り付ける方法を以下に説明する。先
ず、固定フランジ14の貫通穴26をその回転軸12に
嵌め着け、雌ねじ部24にボルト60を締め込むことに
より、その固定フランジ14を回転軸12に固定する。
このボルト60の頭部の外径は第2円筒部25の外径よ
りも小さくされており、後述のように移動フランジ16
を嵌め着ける際にも何等支障は生じない。次いで、その
固定フランジ14の第1円筒部23に、砥石10の貫通
穴30(正確には、芯出し部材48の内周面54)を嵌
合させる。このとき、第1円筒部23と内周面54との
間には、それらの加工精度や磨耗の程度により寸法の決
まる隙間が形成されている。A method of attaching the grindstone 10 configured as described above to the rotating shaft 12 of the grinding machine will be described below. First, the fixing flange 14 is fixed to the rotating shaft 12 by fitting the through hole 26 of the fixing flange 14 to the rotating shaft 12 and tightening the bolt 60 into the female screw portion 24.
The outer diameter of the head of the bolt 60 is smaller than the outer diameter of the second cylindrical portion 25, and the moving flange 16
There is no hindrance at the time of fitting. Next, the through hole 30 of the grindstone 10 (more precisely, the inner peripheral surface 54 of the centering member 48) is fitted into the first cylindrical portion 23 of the fixed flange 14. At this time, a gap is formed between the first cylindrical portion 23 and the inner peripheral surface 54, the size of which is determined by their processing accuracy and the degree of wear.
【0024】その後、図3に示される工具56を用い
て、その2つの爪58,58と締付部材38の係合穴4
2のうち径方向の反対側に位置する2つとを係合させ
て、その締付部材38を左回りに回転させて台金本体3
2の貫通穴30内にねじ込む。このとき、互いに異なる
方向に傾斜させられている締付部材38のテーパ面40
と芯出し部材48のテーパ面52とは互いに摺接させら
れているため、締付部材38をねじ込むに従って、その
テーパ面40により芯出し部材48のテーパ面52が押
圧されて、爪部50が鍔部46と爪部50との境界付近
を支点として図1の矢印Aの方向に倒され、芯出し部材
48の内径が軸心位置を維持した状態で小さくされる。After that, using the tool 56 shown in FIG.
Of the base metal body 3 by rotating the fastening member 38 in the counterclockwise direction.
2 into the through hole 30. At this time, the tapered surface 40 of the fastening member 38 inclined in different directions from each other.
And the tapered surface 52 of the centering member 48 are in sliding contact with each other, so that as the tightening member 38 is screwed in, the tapered surface 52 of the centering member 48 is pressed by the tapered surface 40 and the claw portion 50 is With the vicinity of the boundary between the flange portion 46 and the claw portion 50 as a fulcrum, it is tilted in the direction of arrow A in FIG. 1, and the inner diameter of the centering member 48 is reduced while maintaining the axial position.
【0025】すなわち、芯出し部材48、より正確には
その爪部50は、締付部材38と台金本体32の貫通穴
30との相対回転に伴って発生する軸方向の変位に従っ
て、その内周面54の内径が縮小する方向に弾性変形さ
せられるのである。これにより、上記の第1円筒部23
と砥石10の内周面54との間の隙間がなくなり、砥石
10の芯出しが完了する。そして、移動フランジ16を
固定フランジ14の第2円筒部25に嵌め着けて周方向
の複数箇所において固定ねじ62により固定し、それら
固定フランジ14の大径部22と移動フランジ16とで
砥石10の台金本体32を挟み着けることで、砥石10
が研削盤等の回転軸12に取り付けられる。なお、以上
の砥石10の取り付けは固定フランジ14が回転軸12
に嵌め着けられていない状態で行っても良く、例えば、
上記のように固定フランジ14および移動フランジ16
により砥石10を狭持した状態で回転軸12に嵌め着け
ても良い。また、前記雌ねじ部24は、固定フランジ1
4を回転軸12から取り外すに際して、図示しないボル
トをねじ込むためのものである。That is, the centering member 48, or more precisely, the claw portion 50, of the centering member 48, according to the axial displacement generated by the relative rotation between the fastening member 38 and the through hole 30 of the base metal body 32, includes This is elastically deformed in the direction in which the inner diameter of the peripheral surface 54 decreases. Thereby, the first cylindrical portion 23
The gap between the grinding wheel 10 and the inner peripheral surface 54 of the grinding wheel 10 disappears, and the centering of the grinding wheel 10 is completed. Then, the moving flange 16 is fitted to the second cylindrical portion 25 of the fixed flange 14 and is fixed at a plurality of positions in the circumferential direction by the fixing screws 62. The large-diameter portion 22 of the fixed flange 14 and the moving flange 16 By sandwiching the base metal body 32, the whetstone 10
Is attached to a rotating shaft 12 such as a grinding machine. In addition, the fixed flange 14 is attached to the rotating shaft 12
It may be performed in a state where it is not fitted to, for example,
As described above, the fixed flange 14 and the movable flange 16
May be fitted to the rotating shaft 12 while holding the grindstone 10. Further, the female screw portion 24 is provided with the fixing flange 1.
This is for screwing a bolt (not shown) when removing the 4 from the rotating shaft 12.
【0026】下記の表1は、以上のようにして取り付け
られた本実施例の砥石10と、芯出し機構(すなわち、
締付部材38および芯出し部材48)を有しない従来の
砥石とを、同じ回転軸12(軸心が水平方向とされてい
るもの)に取り付けて測定した結果を示すものである。
なお、砥石10の取り付けは、固定フランジ14が回転
軸12に嵌合された状態で行った。このような取り付け
方法においては、従来の砥石では、砥石10の自重によ
りその内周面54(砥石の貫通穴)と円筒部24との間
の隙間の大きさだけ偏心することなる。そのため、表1
に示されるように従来の砥石においては、大きな外周振
れおよびアンバランス量となったが、本実施例の砥石1
0では、何れの場合においても小さな外周振れおよびア
ンバランス量が得られた。なお、図1においては、上記
隙間は省略されている。Table 1 below shows the whetstone 10 of this embodiment mounted as described above and the centering mechanism (ie, the centering mechanism)
This figure shows the result of a measurement in which a conventional grindstone without the fastening member 38 and the centering member 48) is attached to the same rotating shaft 12 (having a horizontal axis).
The whetstone 10 was attached while the fixed flange 14 was fitted to the rotating shaft 12. In such a mounting method, the conventional grindstone is eccentric by the size of the gap between the inner peripheral surface 54 (the through hole of the grindstone) and the cylindrical portion 24 by the weight of the grindstone 10. Therefore, Table 1
As shown in FIG. 1, in the conventional grindstone, the outer peripheral runout and the amount of unbalance were large.
In the case of 0, a small peripheral runout and an unbalance amount were obtained in each case. In FIG. 1, the gap is omitted.
【0027】[0027]
【表1】 [Table 1]
【0028】なお、上記表1において、研削盤Aは上記
隙間が大きく、研削盤Bは上記隙間が小さいものである
が、表1から明らかなように、本実施例の砥石10にお
いては何れの場合も良好な結果が得られている。これに
対して、従来の砥石の場合には隙間の大きい研削盤Bで
は特に大きな外周振れおよびアンバランス量となる。ま
た、「外周振れ」は、回転中心から外周面(砥石10の
研削面)までの距離の最大値と最小値との差であって、
一般に10μm 以下であることが望まれるものであり、
「アンバランス量」は、砥石10の回転における回転中
心の変位量であって、一般に 0.1μm 以下にすることが
望まれるものである。このアンバランス量は砥石10の
周速度が30m/s の条件で測定している。In Table 1 above, the grinding machine A has a large gap and the grinding machine B has a small gap. As is clear from Table 1, any one of the grinding wheels 10 in the present embodiment is used. Good results have also been obtained in these cases. On the other hand, in the case of a conventional grindstone, the grinding machine B having a large gap has a particularly large peripheral runout and an unbalance amount. The “outer circumference runout” is the difference between the maximum value and the minimum value of the distance from the rotation center to the outer peripheral surface (the ground surface of the grindstone 10).
Generally, it is desired that the thickness is 10 μm or less,
The "unbalance amount" is a displacement amount of the rotation center in the rotation of the grindstone 10, and is generally desired to be 0.1 μm or less. This unbalance amount is measured under the condition that the peripheral speed of the grindstone 10 is 30 m / s.
【0029】ここで、本実施例によれば、砥石10に
は、貫通穴30に形成された雌ねじ部34と、その貫通
穴30の移動フランジ16側の一端から螺合させられる
円環状の締付部材38と、回転軸12の外周面に対向す
る内周面54を備えて上記貫通穴30内に設けられ、締
付部材38と貫通穴30との相対回転に伴って発生する
軸方向の変位に従ってその内周面54の内径が縮小する
方向に弾性変形させられる芯出し部材48とが備えられ
ている。そのため、この砥石10の芯出しは、砥石10
を固定フランジ14の第1円筒部23に嵌め着けた状態
で、芯出し部材48によりその第1円筒部23が締め付
けられるまで、締付部材38と貫通穴30とを相対回転
させるだけの簡単な操作で為され、芯出し部材48の内
径が均等に縮小方向に変形させられることとなるため、
高精度で芯出しが為されることとなる。しかも、締付部
材38と芯出し部材48とは砥石10の貫通穴30内に
その厚み寸法内で設けられているため、従来のフランジ
14,16をそのまま或いは殆ど変更することなく、砥
石10の中央部が挟圧されて完全に固定される。したが
って、比較的簡単な構造の従来のフランジ14,16を
用いて高精度の芯出しが可能な芯出し機構を備えた砥石
10が得られるのである。According to the present embodiment, the grindstone 10 has a female screw portion 34 formed in the through hole 30 and an annular tightening screw threaded from one end of the through hole 30 on the moving flange 16 side. An attachment member 38 and an inner peripheral surface 54 facing the outer peripheral surface of the rotating shaft 12 are provided in the through hole 30, and are provided in the axial direction generated by the relative rotation of the fastening member 38 and the through hole 30. A centering member 48 that is elastically deformed in a direction in which the inner diameter of the inner peripheral surface 54 is reduced according to the displacement. Therefore, the centering of the grinding stone 10 is
In a state where the first cylindrical portion 23 of the fixing flange 14 is fitted to the first cylindrical portion 23, the tightening member 38 and the through hole 30 are simply rotated relative to each other until the first cylindrical portion 23 is tightened by the centering member 48. Since the inner diameter of the centering member 48 is uniformly deformed in the reducing direction,
Alignment is performed with high precision. Moreover, since the tightening member 38 and the centering member 48 are provided within the through hole 30 of the grindstone 10 within the thickness dimension thereof, the conventional flanges 14 and 16 can be used as they are or with little change. The central part is pinched and completely fixed. Therefore, it is possible to obtain the grindstone 10 having a centering mechanism capable of performing high-precision centering using the conventional flanges 14 and 16 having a relatively simple structure.
【0030】なお、本実施例においては、芯出し部材4
8は、貫通穴30内において軸方向の移動不能に固定さ
れているため、貫通穴30に螺合されている締付部材3
8とその貫通穴30との相対回転に伴って発生する軸方
向の変位に従って、締付部材38と芯出し部材48との
軸方向の相対位置が変化させられる。このとき、締付部
材38は、その螺進方向側からその螺進方向の反対方向
に向かって小径となるテーパ面40を備えており、芯出
し部材48は、周方向において分割され且つ締付部材3
8の螺進方向と反対方向に突き出す弾性変形可能な複数
本の爪部50と、それら複数本の爪部50の先端部に形
成されて締付部材38のテーパ面40と摺接するテーパ
面52とを備えているため、両者の軸方向の相対位置の
変化に応じて締付部材38のテーパ面40が芯出し部材
48のテーパ面52を内周側すなわち回転軸12の外周
面に向かって押圧することとなり、締付部材38の軸方
向の変位に従って芯出し部材48の内径が縮小する方向
に変形させられて、芯出しが行われるのである。In this embodiment, the centering member 4
The fastening member 3 is screwed into the through hole 30 because it is fixed in the through hole 30 so as not to move in the axial direction.
The axial relative position of the tightening member 38 and the centering member 48 is changed according to the axial displacement generated due to the relative rotation between the tightening member 38 and the through hole 30. At this time, the fastening member 38 includes a tapered surface 40 having a smaller diameter from the screwing direction side to the opposite direction to the screwing direction, and the centering member 48 is divided in the circumferential direction and tightened. Member 3
8, a plurality of elastically deformable claws 50 protruding in the direction opposite to the screwing direction, and a tapered surface 52 formed at the tip of the plurality of claws 50 and slidingly contacting the tapered surface 40 of the tightening member 38. Therefore, the tapered surface 40 of the fastening member 38 moves the tapered surface 52 of the centering member 48 toward the inner circumferential side, that is, toward the outer circumferential surface of the rotary shaft 12 in accordance with the change in the relative position in the axial direction. As a result, the inner diameter of the centering member 48 is reduced in a direction in which the inner diameter of the centering member 48 is reduced in accordance with the axial displacement of the fastening member 38, and the centering is performed.
【0031】また、本実施例によれば、砥石10の芯出
しすなわち締付部材38のねじ込みは、工具56の爪5
8,58を係合穴42に係合させて回転させることによ
り行い得るため、芯出し作業が比較的容易となる。According to the present embodiment, the centering of the grindstone 10, that is, the screwing of the fastening member 38 is performed by the claw 5 of the tool 56.
The alignment can be performed by rotating the engagement holes 58 and 58 in the engagement holes 42, so that the centering operation is relatively easy.
【0032】次に、本発明の他の実施例を説明する。な
お、以下の実施例において、前述の実施例と共通する部
分は同一の符号を付して説明を省略する。Next, another embodiment of the present invention will be described. In the following embodiments, portions common to the above-described embodiments will be denoted by the same reference numerals and description thereof will be omitted.
【0033】(第2実施例)図4は、砥石10に用いら
れ得る他の芯出し機構の構成を示す要部断面図である。
本実施例においては、芯出し機構は締付部材64と芯出
し部材66から構成されている。締付部材64は、前記
実施例の締付部材38と略同様な形状とされているが、
一方、芯出し部材66は、爪部50の外周面68がテー
パ面とされておらず、貫通穴30と軸心が一致する円筒
面に形成されている。このように構成されていても、前
述の実施例と同様に締付部材64と貫通穴30とを相対
回転させて、その締付部材64を図の矢印B方向にねじ
込むことにより、テーパ面40によって爪部50が押圧
されて鍔部46との境界付近を支点として図の矢印Aの
方向に倒され、芯出しが行われる。(Second Embodiment) FIG. 4 is a sectional view of a main part showing the structure of another centering mechanism that can be used for the grindstone 10. As shown in FIG.
In the present embodiment, the centering mechanism includes a tightening member 64 and a centering member 66. The tightening member 64 has substantially the same shape as the tightening member 38 of the above embodiment,
On the other hand, the centering member 66 is formed such that the outer peripheral surface 68 of the claw portion 50 is not a tapered surface, but is a cylindrical surface whose axis coincides with the through hole 30. Even with such a configuration, the tightening member 64 and the through hole 30 are rotated relative to each other as in the above-described embodiment, and the tightening member 64 is screwed in the direction of arrow B in FIG. As a result, the claw portion 50 is pressed and is tilted in the direction of arrow A in the drawing with the vicinity of the boundary with the flange portion 46 as a fulcrum, thereby performing centering.
【0034】すなわち、締付部材64および芯出し部材
66から構成される芯出し機構においては、互いに当接
する面40,68の両方がテーパ面とされている必要は
なく、締付部材64のみにテーパ面40が設けられてい
ても良いのである。なお、このような構成とする場合に
は、図から明らかなように、爪部50の軸方向長さは、
台金本体32の軸方向長さよりも短く形成される必要が
ある。That is, in the centering mechanism composed of the tightening member 64 and the centering member 66, both of the surfaces 40 and 68 that come into contact with each other need not be tapered, and only the tightening member 64 is provided. The tapered surface 40 may be provided. In addition, in the case of such a configuration, the axial length of the claw portion 50 is
It is necessary to form the base metal body 32 shorter than the axial length.
【0035】(第3実施例)図5は、砥石10に用いら
れ得る芯出し機構の更に他の構成を示す図である。本実
施例においては、円筒状の締付部材70,弾性部材7
2,およびリング状の挟圧部材74から芯出し機構が構
成されている。上記締付部材70および挟圧部材74
は、何れも例えばS45C調質鋼から成るものである。
この締付部材70は、台金本体32の雌ねじ部34に螺
合させられる雄ねじ部76を外周面に備えており、前記
締付部材64等と同様に、貫通穴30と相対回転させら
れることにより軸方向に移動させられる。また、挟圧部
材74は、前述の実施例の芯出し部材66等の鍔部46
よりも比較的厚く形成されており、外周側部分において
台金本体32の内周側部分に設けられた段付部78に複
数のねじ49により固定されている。(Third Embodiment) FIG. 5 is a view showing still another configuration of a centering mechanism that can be used for the grindstone 10. In this embodiment, the cylindrical fastening member 70 and the elastic member 7
A centering mechanism is constituted by the second and ring-shaped pressing members 74. The fastening member 70 and the clamping member 74
Are made of, for example, S45C tempered steel.
The fastening member 70 has a male screw portion 76 screwed to the female screw portion 34 of the base metal body 32 on the outer peripheral surface, and can be relatively rotated with the through hole 30 similarly to the fastening member 64 and the like. Is moved in the axial direction. Further, the clamping member 74 is provided with the flange 46 such as the centering member 66 of the above-described embodiment.
The outer peripheral portion is fixed to a stepped portion 78 provided on the inner peripheral portion of the base metal body 32 by a plurality of screws 49.
【0036】一方、弾性部材72は、例えば厚肉短円筒
状の天然ゴム或いは合成ゴムから成るものであり、貫通
穴30の内周側において、上記締付部材70および挟圧
部材74との間の位置に備えられている。これら、締付
部材70,弾性部材72,および挟圧部材74は、その
内周面80,82,84が何れも貫通穴30と軸心が共
通な一つの円筒面上に位置させられると共に、その全体
すなわち芯出し機構全体が台金32(砥石10)の厚み
寸法内に設けられている。On the other hand, the elastic member 72 is made of, for example, a natural rubber or a synthetic rubber having a thick and short cylindrical shape, and is provided between the tightening member 70 and the pressing member 74 on the inner peripheral side of the through hole 30. It is provided in the position of. The fastening member 70, the elastic member 72, and the clamping member 74 have their inner peripheral surfaces 80, 82, and 84 all located on a single cylindrical surface having a common axis with the through hole 30. The entirety, that is, the entire centering mechanism is provided within the thickness of the base metal 32 (the grindstone 10).
【0037】上記構成の芯出し機構においては、締付部
材70と貫通穴30とを相対回転させてその締付部材7
0を図の矢印Bの方向に移動させると、挟圧部材74は
段付部78に固定されて軸方向に移動不能とされている
ため、弾性部材72は、それら締付部材70および挟圧
部材74との間で挟圧される。このため、弾性部材72
は、その挟圧力に従ってその軸方向の厚さが薄くされる
一方、内周方向すなわち図の矢印Cの方向に膨出させら
れ、図に一点鎖線で示すように周方向に略均一に弾性変
形させられる。これにより、砥石10の内径が小さくさ
れるが、上記弾性部材72は恰も流体の如く圧力を伝達
し、砥石10の自重に拘らず高精度に芯出しが為される
こととなる。以上の説明から明らかなように、本実施例
においては、上記弾性部材72が芯出し部材に相当す
る。In the centering mechanism having the above-described structure, the fastening member 70 and the through hole 30 are relatively rotated and the fastening member 7 is rotated.
0 is moved in the direction of arrow B in the figure, the pressing member 74 is fixed to the stepped portion 78 and cannot move in the axial direction. It is clamped between the member 74. For this reason, the elastic member 72
Is reduced in thickness in the axial direction according to the pinching force, and is swelled in the inner circumferential direction, that is, in the direction of arrow C in the figure, and is elastically deformed substantially uniformly in the circumferential direction as shown by the dashed line in the figure. Let me do. As a result, the inner diameter of the grindstone 10 is reduced, but the elastic member 72 transmits the pressure as if it were a fluid, and the centering is performed with high accuracy regardless of the weight of the grindstone 10. As is clear from the above description, in the present embodiment, the elastic member 72 corresponds to the centering member.
【0038】(第4実施例)図6は、砥石10に用いら
れ得る芯出し機構の更に他の構成を示す図である。本実
施例においては、上記図5に示される実施例において、
弾性部材72に代えて複数枚(本実施例においては4
枚)の皿ばね86が備えられているが、他の分は図5の
実施例と同様である。すなわち、皿ばね86が芯出し部
材に相当し、締付部材70,挟圧部材74,および皿ば
ね86によって芯出し機構が構成されている。この皿ば
ね86は、締付部材70が螺進させられることによりそ
の締付部材70と挟圧部材74との間で挟圧されると、
全体が平坦になるように弾性変形させられると同時にそ
の内径が縮小する方向に周方向に略均一に弾性変形させ
られる。これにより、上記弾性部材72が用いられてい
る場合と同様に、芯出しが行われるのである。(Fourth Embodiment) FIG. 6 is a view showing still another configuration of a centering mechanism that can be used for the grindstone 10. As shown in FIG. In this embodiment, in the embodiment shown in FIG.
Instead of the elastic member 72, a plurality of sheets (4 in this embodiment)
5), but the other parts are the same as in the embodiment of FIG. That is, the disc spring 86 corresponds to the centering member, and the tightening member 70, the pressing member 74, and the disc spring 86 constitute a centering mechanism. When the tightening member 70 is screwed forward, the disc spring 86 is pinched between the tightening member 70 and the pinching member 74.
It is elastically deformed so that the whole becomes flat, and at the same time, it is elastically deformed substantially uniformly in the circumferential direction in the direction in which the inner diameter decreases. Thus, centering is performed in the same manner as in the case where the elastic member 72 is used.
【0039】以上、本発明の一実施例を図面を参照して
詳細に説明したが、本発明は、更に別の態様でも実施さ
れる。While the embodiment of the present invention has been described in detail with reference to the drawings, the present invention can be embodied in still another embodiment.
【0040】例えば、前述の実施例においては、本発明
が円板状の砥石10に適用された場合について説明した
が、本発明は、貫通穴を有して回転軸に取り付けて用い
られるものであれば種々の形状の砥石に適用可能であ
り、例えば、円筒状やカップ状の砥石等に適用されても
良い。For example, in the above-described embodiment, the case where the present invention is applied to the disc-shaped grindstone 10 has been described. However, the present invention has a through hole and is used by being attached to a rotating shaft. If it is available, it can be applied to grindstones of various shapes, for example, it may be applied to a cylindrical or cup-shaped grindstone.
【0041】また、第1,第2実施例においては、締付
部材38,64の内周面および芯出し部材48外周面が
それぞれテーパ面とされて、締付部材38,64を固定
フランジ14の大径部22側にねじ込むことにより芯出
しが為されるように構成された場合について説明した
が、第2実施例とは反対に、芯出し部材66の外周面6
8がテーパ面とされて、締付部材64の内周面が円筒面
とされていても同様に芯出しが可能である。また、例え
ば、第1実施例において、締付部材38のテーパ面40
と芯出し部材48のテーパ面52の傾きがそれぞれ反対
にされて、締付部材38が固定フランジ14の大径部2
2から離隔する方向に相対回転させることにより、爪部
50が倒されて芯出しが為されるように構成することも
可能である。In the first and second embodiments, the inner peripheral surfaces of the tightening members 38 and 64 and the outer peripheral surface of the centering member 48 are tapered, so that the tightening members 38 and 64 are fixed to the fixing flange 14. Of the centering member 66 is screwed into the large-diameter portion 22 side. However, contrary to the second embodiment, the outer circumferential surface 6 of the centering member 66 is opposite to the second embodiment.
Even if 8 is a tapered surface and the inner peripheral surface of the tightening member 64 is a cylindrical surface, centering can be similarly performed. Further, for example, in the first embodiment, the tapered surface 40 of the fastening member 38 is used.
And the inclination of the tapered surface 52 of the centering member 48 are reversed, so that the tightening member 38
It is also possible to configure so that the claw portion 50 is tilted down to perform centering by relatively rotating in a direction away from the center portion 2.
【0042】また、第3実施例においては、弾性部材7
2の内周面82が、締付部材70および挟圧部材74の
内周面80,84と同一円筒面上に位置させられている
が、内周面82は、内周面80,84よりも内周側或い
は外周側に位置させられていても良い。また、締付部材
70と挟圧部材74の内周面80,84も同一円筒面上
に位置させられていなくとも差し支えない。In the third embodiment, the elastic member 7
2, the inner peripheral surface 82 is located on the same cylindrical surface as the inner peripheral surfaces 80 and 84 of the tightening member 70 and the pressing member 74. However, the inner peripheral surface 82 is higher than the inner peripheral surfaces 80 and 84. May be located on the inner peripheral side or the outer peripheral side. Also, the inner peripheral surfaces 80 and 84 of the fastening member 70 and the clamping member 74 need not be located on the same cylindrical surface.
【0043】また、第4実施例においては、芯出し部材
が4枚の皿ばね86から構成されていたが、その枚数は
適宜変更可能である。例えば、1枚の皿ばね86から芯
出し部材が構成されても良く、反対に5枚以上の皿ばね
86から芯出し部材が構成されても良い。Further, in the fourth embodiment, the centering member is constituted by four disc springs 86, but the number thereof can be changed as appropriate. For example, the centering member may be constituted by one disc spring 86, and conversely, the centering member may be constituted by five or more disc springs 86.
【0044】その他、一々例示はしないが、本発明はそ
の主旨を逸脱しない範囲で種々変更を加え得るものであ
る。Although not specifically exemplified, the present invention can be variously modified without departing from the gist thereof.
【図1】本発明の芯出し機構付砥石が回転軸に取り付け
られている状態を、一部を切り欠いて示す図である。FIG. 1 is a partially cutaway view showing a state in which a grindstone with a centering mechanism of the present invention is attached to a rotating shaft.
【図2】図1の砥石を移動フランジ側の一面から見た状
態を半分について示す図である。FIG. 2 is a view showing a half of a state in which the grindstone of FIG. 1 is viewed from one surface on a moving flange side.
【図3】図1の芯出しをするに際して、締付部材を回転
させるために用いられる工具を示す図である。FIG. 3 is a view showing a tool used for rotating a tightening member when performing the centering shown in FIG. 1;
【図4】本発明の他の実施例の要部断面を示す図であ
り、図1における台金本体の貫通穴近傍を拡大して示す
図である。FIG. 4 is a view showing a cross section of a main part of another embodiment of the present invention, and is an enlarged view showing a vicinity of a through hole of a base metal body in FIG. 1;
【図5】本発明の更に他の実施例の要部断面を示す図で
あり、図4に相当する図である。FIG. 5 is a diagram showing a cross section of a main part of still another embodiment of the present invention, and is a diagram corresponding to FIG. 4;
【図6】本発明の更に他の実施例の要部断面を示す図で
あり、図4に相当する図である。FIG. 6 is a diagram showing a cross section of a main part of still another embodiment of the present invention, and is a diagram corresponding to FIG. 4;
10:芯出し機構付砥石 12:回転軸 30:貫通穴 34:雌ねじ部 36:雄ねじ部 38:締付部材 48:芯出し部材 10: Grinding stone with centering mechanism 12: Rotating shaft 30: Through hole 34: Female thread 36: Male thread 38: Tightening member 48: Centering member
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6,DB名) B24D 5/16 B24B 45/00──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. 6 , DB name) B24D 5/16 B24B 45/00
Claims (4)
え、該貫通穴が回転軸に嵌め着けられて用いられる砥石
であって、 前記貫通穴の内周側に設けられた雌ねじ部と、 外周面に雄ねじ部を備えて略環状を成し、前記雌ねじ部
に前記貫通穴の一端から螺合させられる締付部材と、 前記回転軸の外周面に対向する内周面を備えて前記貫通
穴内に設けられ、該締付部材と前記貫通穴との相対回転
に伴って発生する軸方向の変位に従って、該内周面の内
径が縮小する方向に弾性変形させられる芯出し部材と
を、含むことを特徴とする芯出し機構付砥石。1. A grindstone provided with a through hole at a central portion penetrating in an axial direction, wherein the through hole is used by being fitted to a rotating shaft, and a female screw portion provided on an inner peripheral side of the through hole. An outer peripheral surface having a male thread portion, forming a substantially annular shape, a tightening member screwed into the female thread portion from one end of the through hole, and an inner peripheral surface facing the outer peripheral surface of the rotary shaft. A centering member that is provided in the through hole and that is elastically deformed in a direction in which the inner diameter of the inner peripheral surface is reduced according to an axial displacement generated due to the relative rotation of the fastening member and the through hole, A grindstone with a centering mechanism characterized by including:
螺進方向の反対方向に向かって小径となるテーパ状内周
面を備え、 前記芯出し部材は、周方向において分割され且つ前記螺
進方向と反対方向に突き出す弾性変形可能な複数本の爪
部と、該複数本の爪部の先端部に形成されて前記締付部
材のテーパ状内周面と摺接する摺接面とを備え、前記貫
通穴内において軸方向の移動不能に固定されている請求
項1の芯出し機構付砥石。2. The tightening member has a tapered inner peripheral surface having a smaller diameter from a screwing direction side toward a direction opposite to the screwing direction, the centering member is divided in a circumferential direction, and A plurality of elastically deformable claws protruding in a direction opposite to the screwing direction; and a sliding contact surface formed at the tip of the plurality of claws and slidingly contacting the tapered inner peripheral surface of the tightening member. 2. The grinding wheel with a centering mechanism according to claim 1, further comprising:
一端から螺合させられる締付部材の端面と対向する環状
の端面を有する挟圧部材が固定され、 前記芯出し部材は、該締付部材の端面と該挟圧部材の端
面との間で挟圧されることにより内周側へ膨出して内径
を縮小する厚肉円筒状の弾性部材である請求項1の芯出
し機構付砥石。3. A clamping member having an annular end surface facing an end surface of a fastening member screwed from one end of the through hole is fixed to the other end side of the through hole. 2. A centering elastic member according to claim 1, wherein said elastic member is a thick-walled cylindrical elastic member which swells inward by being pressed between an end surface of said fastening member and an end surface of said pressing member to reduce its inner diameter. Whetstone with mechanism.
一端から螺合させられる締付部材の端面と対向する環状
の端面を有する挟圧部材が固定され、 前記芯出し部材は、該締付部材の端面と該挟圧部材の端
面との間で挟圧されることにより内径を縮小される皿状
ばねである請求項1の芯出し機構付砥石。4. A clamping member having an annular end surface facing an end surface of a fastening member screwed from one end of the through hole is fixed to the other end of the through hole. 2. The grinding wheel with a centering mechanism according to claim 1, wherein the grinding wheel is a disc-shaped spring whose inner diameter is reduced by being squeezed between an end surface of the fastening member and an end surface of the squeezing member.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP481895A JP2834016B2 (en) | 1995-01-17 | 1995-01-17 | Whetstone with centering mechanism |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP481895A JP2834016B2 (en) | 1995-01-17 | 1995-01-17 | Whetstone with centering mechanism |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH08192365A JPH08192365A (en) | 1996-07-30 |
JP2834016B2 true JP2834016B2 (en) | 1998-12-09 |
Family
ID=11594317
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP481895A Expired - Lifetime JP2834016B2 (en) | 1995-01-17 | 1995-01-17 | Whetstone with centering mechanism |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2834016B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004061871B4 (en) * | 2004-12-22 | 2007-05-31 | Erwin Junker Maschinenfabrik Gmbh | Clamping device with centering device on a grinding spindle rotor and rotating part with such a centering device |
-
1995
- 1995-01-17 JP JP481895A patent/JP2834016B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH08192365A (en) | 1996-07-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2846826A (en) | Mounting and truing device for peripheral type circular grinding or cutting wheels | |
CN113752105B (en) | Outer cylindrical surface polishing device and using method | |
TW308562B (en) | ||
JP2834016B2 (en) | Whetstone with centering mechanism | |
US3665657A (en) | Apparatus for mounting disc brake rotors during truing | |
US6641473B2 (en) | Grinding wheel with abrasive segment chips including at least two abrasive segment chips whose circumferential lengths are different from each other | |
US2841929A (en) | Truing device for peripheral type grinding wheels | |
US5137402A (en) | Rotary ring cutter | |
US5215417A (en) | Rotary ring cutter | |
JP4284792B2 (en) | Super finishing method of ball bearing raceway surface | |
CA1307400C (en) | Quick change lens tool | |
WO2024043237A1 (en) | Flanged grindstone, flange, and grindstone | |
US3845587A (en) | Radial surface finishing apparatus | |
JP2859245B2 (en) | Rotary ring cutter | |
JPH07314223A (en) | Arbor for grinding cylinder | |
JP2001001243A (en) | Method and device for chamfering outer circumferential portion of thin disklike work | |
JP2024031824A (en) | Grindstone with flange, flange, and grindstone | |
JP3357619B2 (en) | Centerless grinding method | |
CN212192383U (en) | Cylindrical grinding machine clamp for shaft products without center hole | |
JP2632498B2 (en) | Whetstone holding structure | |
JPH0578464U (en) | Cutting blade assembly device and jig | |
JP2001347461A (en) | Grinding wheel flange assembly for surface grinder | |
RU1813617C (en) | Chuck of grinding wheel | |
RU2102220C1 (en) | Device for fastening of grinding wheel | |
JPS594260B2 (en) | Double-headed diamond grinding wheel for surface grinding |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20071002 Year of fee payment: 9 |
|
FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081002 Year of fee payment: 10 |
|
FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081002 Year of fee payment: 10 |
|
FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091002 Year of fee payment: 11 |
|
FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091002 Year of fee payment: 11 |
|
FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101002 Year of fee payment: 12 |
|
FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101002 Year of fee payment: 12 |
|
FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111002 Year of fee payment: 13 |
|
FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111002 Year of fee payment: 13 |
|
FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121002 Year of fee payment: 14 |
|
FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20131002 Year of fee payment: 15 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
EXPY | Cancellation because of completion of term |