JPH0122084B2 - - Google Patents
Info
- Publication number
- JPH0122084B2 JPH0122084B2 JP59036743A JP3674384A JPH0122084B2 JP H0122084 B2 JPH0122084 B2 JP H0122084B2 JP 59036743 A JP59036743 A JP 59036743A JP 3674384 A JP3674384 A JP 3674384A JP H0122084 B2 JPH0122084 B2 JP H0122084B2
- Authority
- JP
- Japan
- Prior art keywords
- ground
- hole
- center
- workpiece
- grinding
- 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
Links
- 230000006835 compression Effects 0.000 description 16
- 238000007906 compression Methods 0.000 description 16
- 230000002093 peripheral effect Effects 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Landscapes
- Gripping On Spindles (AREA)
- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は、研削装置における円柱状あるいは円
筒状の被研削体保持装置の改良に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an improvement of a cylindrical or cylindrical object holding device in a grinding device.
円筒状（本願には円柱状物も含む）の被研削体
である被加工物の外周面を研削（研磨を含む）す
るには、同筒研削装置を使用し、該被加工物の両
端面を同一の軸心上に対向配置された主軸側セン
タと心押台側センタとで支持するとともに、該被
加工物の主軸側端部外周を保持し主軸と一体的に
回転することにより支持された軸心を中心に外周
が偏心のないよう精密研削される。しかして近年
自動制御化された搬送装置（ロボツト装置）によ
り被加工物を研削装置に装着、取外すことによつ
て一連の研削工程が自動化されるようになつた。
To grind (including polishing) the outer peripheral surface of a cylindrical (including cylindrical objects) workpiece, use the same cylindrical grinding device, and grind both end surfaces of the workpiece. is supported by a spindle side center and a tailstock side center which are arranged oppositely on the same axis, and is supported by holding the outer periphery of the spindle side end of the workpiece and rotating integrally with the spindle. The outer periphery is precisely ground to avoid eccentricity around the axial center. However, in recent years, a series of grinding processes has come to be automated by attaching and removing workpieces to and from a grinding device using automatically controlled conveyance devices (robotic devices).
第１図は、本特許出願にかかわる発明者等が先
に提案した被加工物を自動的に保持する保持装置
の断面である。同図において、中空円板状の面板
２は主軸１の主軸受け１ａ側の軸端部に螺入装着
される。この面板２には心押台側端面に主軸１の
軸心に直交して互いに異なる半径方向直線上に摺
動保持子であるクランプ５，６が第２図に示した
面板２のガイド溝１１，１２に摺動自在に嵌合挿
入されている。
FIG. 1 is a cross-sectional view of a holding device for automatically holding a workpiece, which was previously proposed by the inventors involved in this patent application. In the figure, a hollow disk-shaped face plate 2 is screwed onto the shaft end of the main shaft 1 on the main bearing 1a side. Clamps 5 and 6, which are sliding retainers, are attached to the end face of the face plate 2 on the tailstock side on different radial straight lines perpendicular to the axis of the main spindle 1. , 12 in a slidable manner.
正面視長方形のクランプ５，６は第２図に示し
たように、何れも面板２の中心部に位置する先端
部５Ａ，６Ａに幅が被加工物１０の外形よりも大
きく先端が中心に対して対称な谷形に形成された
半径方向に長い長孔５Ｂ，６Ｂが設けられ、かつ
第１図に示したように先端部５Ａの面板２の端面
に並行するスリツトに他の先端部６Ａが嵌合して
いる。 As shown in FIG. 2, the clamps 5 and 6, which are rectangular in front view, have tip portions 5A and 6A located at the center of the face plate 2, each having a width larger than the outer shape of the workpiece 10 and the tip facing away from the center. radially long elongated holes 5B and 6B formed in a symmetrical valley shape are provided, and as shown in FIG. They are mated.
また、クランプ５，６は面板２の外周面に取着
されたばね押え７との間に介装された圧縮コイル
ばね８，８によつて軸心側に押圧され被加工物１
０が挿入可能なように長孔５Ｂ，６Ｂが軸心にお
いて重なり合い開口している。 Further, the clamps 5 and 6 are pressed toward the axis by compression coil springs 8 and 8 interposed between the spring holder 7 attached to the outer peripheral surface of the face plate 2, and the workpiece 1
The elongated holes 5B and 6B overlap each other at their axes and are open so that a 0 can be inserted therein.
上記保持装置９の状態は主軸が回転停止してい
る時であり、被加工物１０をロボツト装置（図示
なし）によつて搬送し水平に長孔５Ｂ，６Ｂの開
口を通し端部のセンサ穴あるいは軸心孔を主軸１
のセンタ３に一致させ、心押台を前進させて他の
端部のセンタ穴あるいは軸心孔をセンタ４と一致
させ回転軸心上センタ３，４に支持させてロボツ
ト装置を退避させる。 The state of the holding device 9 is when the main shaft is not rotating, and the workpiece 10 is transported by a robot device (not shown) horizontally through the openings of the long holes 5B and 6B and inserted into the sensor hole at the end. Alternatively, the shaft center hole can be
The tailstock is moved forward to align the center hole or shaft hole at the other end with the center 4, and the robot device is retracted by supporting the centers 3 and 4 on the rotation axis.
次いで、主軸１を回転駆動すると、クランプ
５，６にはそれぞれ圧縮コイルばね８の圧縮力以
上の強い遠心力が発生する。クランプ５，６は互
いに離反する方向にガイド溝１１，１２に沿つて
移動するが、それによつて長孔５Ｂ，６Ｂ開口の
相互の谷辺で被加工物１０を挟持する。この挟持
力は回転中被加工物１０表面の研削力に十分耐え
る大きさを維持し被加工物１０を主軸１と同一回
転に保持する。 Next, when the main shaft 1 is driven to rotate, a centrifugal force stronger than the compression force of the compression coil spring 8 is generated in each of the clamps 5 and 6. The clamps 5 and 6 move along the guide grooves 11 and 12 in directions away from each other, thereby clamping the workpiece 10 at the mutual valley sides of the openings of the elongated holes 5B and 6B. This clamping force maintains a magnitude sufficient to withstand the grinding force on the surface of the workpiece 10 during rotation, and holds the workpiece 10 at the same rotation as the main shaft 1.
研削の終了に伴ない回転を停止させると遠心力
は次第に減少し停止とともに圧縮コイルばね８，
８の復元力によつてクランプ５，６は互いに近寄
り長孔５Ｂ，６Ｂが開口して保持が解除される。
再びロボツト装置を移動させ、これに被加工物１
０を保持させて心押台を後退させ取出す。以上一
連の作業はすべて自動的に制御され、何ら人手を
要せず逐次行われる。 When the rotation is stopped with the completion of grinding, the centrifugal force gradually decreases, and as the rotation stops, the compression coil spring 8,
Due to the restoring force of the clamps 8, the clamps 5 and 6 approach each other, the long holes 5B and 6B open, and the holding is released.
Move the robot device again and place workpiece 1 on it.
0, move the tailstock back, and take it out. All of the above series of operations are automatically controlled and performed one after another without any human intervention.
上記従来の自動化された保持装置９は、他の同
種の公知な保持装置に比して構造が簡単であり、
しかも低コストである。とくに例えば光フアイバ
コネクタ用のフエルールのように、外径が小さく
かつ内径と外径の同心であることに高精度を要求
されるような加工物の外周研削に適用して効果が
大きい。しかしながら被加工物１０のセンタ穴と
該被加工物の外径に対する中心とが偏心している
場合には問題がある。 The conventional automated holding device 9 has a simpler structure than other similar known holding devices,
Moreover, it is low cost. It is particularly effective when applied to grinding the outer periphery of workpieces such as ferrules for optical fiber connectors, which have small outer diameters and require high precision in concentricity of the inner and outer diameters. However, there is a problem when the center hole of the workpiece 10 and the center with respect to the outer diameter of the workpiece are eccentric.
第２図イは上記センタ穴と中心の両者が一致し
ており、挟持状態でクランプ５，６の長孔５Ｂ，
６Ｂの谷形辺の四辺に被加工物１０の外周が当接
している。対向する２辺の挟持力は均等に作用す
るから研削は正確に行われ、精度も良い。 In Fig. 2A, both the center hole and the center are aligned, and the elongated hole 5B of the clamps 5, 6 in the clamped state,
The outer periphery of the workpiece 10 is in contact with the four sides of the valley-shaped side 6B. Since the clamping forces on the two opposing sides act equally, grinding is performed accurately and with good precision.
第２図ロは上記の両者が不一致の状態を示す。
すなわち、被加工物１０Ａは前工程の機械加工に
よるセンタ穴加工位置と外径に対する中心位置と
が偏心したため、両センタ３，４に支持した後ク
ランプ５，６で挟持させると、長孔５Ｂ，６Ｂの
谷辺が外周に均等に当接せずそれぞれのクランプ
５，６の谷辺の何れかの一辺で当接し他の辺が当
接しないか弱い接触力でしか挟持しないことにな
る。 FIG. 2B shows a state in which the above two conditions do not match.
That is, since the center hole machining position of the workpiece 10A in the previous process and the center position with respect to the outer diameter are eccentric, when the workpiece 10A is supported by both centers 3 and 4 and then held between the clamps 5 and 6, the elongated hole 5B, The valley sides of the clamps 6B do not contact the outer periphery evenly, and either one of the valley sides of each clamp 5, 6 comes into contact with the clamps, and the other sides either do not come into contact with each other or are clamped only with a weak contact force.
以上のことは被加工物１０Ａをセンタに対して
偏位させる力が大きく作用し、研削が正確に行え
ず、ときによつては谷辺と被加工物との間に回転
辷りを生じ上記のことと重なつて一層真円の仕上
り精度が悪くなる恐れがある。 The reason for the above is that a large force acts to displace the workpiece 10A with respect to the center, making it impossible to perform accurate grinding, and sometimes causing rotational slippage between the valley and the workpiece, as described above. In addition, there is a risk that the accuracy of the perfect circle finish will deteriorate even further.
本発明の目的とするところは、上記従来の問題
点に鑑み、偏心した被研削体をも均等かつ確実に
保持し得る保持装置の提供にある。
In view of the above-mentioned conventional problems, it is an object of the present invention to provide a holding device that can evenly and reliably hold even an eccentric object to be ground.
上記目的を達する本発明の構成要旨は、
同一の軸心上に対向配置されたセンタ間に円筒
上の被研削体を支持せしめるとともに上記軸心の
直交方向の回転遠心力によつて半径方向の案内部
に沿つて互いに離反する一対の錘体にそれぞれ説
けられた被研削体保持子の孔に上記被研削体を挿
入し該孔位置の偏位に伴い孔の端面にて被研削体
の一端部を回転保持する研削装置において、上記
一対の被研削体保持子の一方は上記軸心と直交す
る面上に孔側を傾動自在として端部を枢支しかつ
孔の被研削体保持側の形状を谷形として該谷形の
傾斜２辺で当接せしめ、他方の被研削体保持子の
孔を遠心移動方向と直交方向の一辺として該一辺
で当接せしめるようにしてなり、上記被研削体を
上記一方の傾斜２辺と他方の一辺との３辺で被研
削体の外周の中心位置に対応して外周を回転保持
するようにしたことにある。
The gist of the present invention, which achieves the above object, is to support a cylindrical object to be ground between centers disposed oppositely on the same axis, and to rotate the object in the radial direction by centrifugal force perpendicular to the axis. The object to be ground is inserted into the hole of the object holder, which is formed in a pair of weights separated from each other along the guide part, and as the position of the hole shifts, one end of the object to be ground is held at the end surface of the hole. In a grinding device for rotationally holding a part, one of the pair of workpiece holders is pivotally supported at its end with the hole side tiltable on a plane perpendicular to the axis, and the end part of the workpiece holding side of the hole is tiltable. The shape of the object to be ground is made into a valley shape, and the two inclined sides of the valley shape are brought into contact with each other. The outer periphery of the body is rotated and held by three sides, one of the two inclined sides and one of the other sides, corresponding to the center position of the outer periphery of the object to be ground.
以下、本発明の被研削体保持装置の実施例につ
いて、図面を参照して具体的に説明する。なお全
図を通じて同一符号は同一対象部を示す。
DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the grinding object holding device of the present invention will be specifically described below with reference to the drawings. Note that the same reference numerals indicate the same target parts throughout the figures.
第３図は、本発明の被研削体保持装置の一実施
例の要部正面で、第４図イは側断面、第４図ロは
イ図のＭ−Ｍ断面である。第３図において、２３
は面板２に対して凹溝内半径方向摺動可能に装着
された一方の摺動子（スライダ）２１の前面に装
着された長方形板でなる保持子（クランプ板）で
あつて、主軸センタ３側に幅が被研削体３０の外
径よりも十分に大きい幅の角孔の先端側が挟角を
有する谷形の２辺に形成された５角形の長孔２３
Ａが、反対側にはピン２５がその頚部を挿通孔２
３Ｂと遊嵌して面板２の表面と並行方向傾動自在
に取着されている。 FIG. 3 is a front view of a main part of an embodiment of the grinding object holding device of the present invention, FIG. 4A is a side cross section, and FIG. In Figure 3, 23
is a retainer (clamp plate) made of a rectangular plate attached to the front surface of one slider (slider) 21 that is attached to the face plate 2 so as to be slidable in the radial direction in a concave groove; A pentagonal elongated hole 23 is formed on two sides of a valley shape, and the tip side of the rectangular hole has a width sufficiently larger than the outer diameter of the object to be ground 30 and has an included angle.
A is inserted into the neck of the pin 25 on the opposite side through the insertion hole 2.
3B, and is attached to the surface of the face plate 2 so as to be freely tiltable in a direction parallel to the surface of the face plate 2.
２４は面板２に対して凹溝内半径方向摺動可能
に、摺動子（スライダ）２１と対応して直線上に
装着された他方の摺動子（スライダ）２２の前面
に装着された長方形板でなる保持子（クランプ
板）であつて、主軸センタ３側に幅が被研削体３
０の外径よりも十分に大きい幅の４角形の長孔２
４Ａが、反対側はねじ２６によつて取着されてい
る。 A rectangular shape 24 is attached to the front surface of the other slider (slider) 22, which is attached in a straight line in correspondence with the slider (slider) 21, so as to be able to slide in the radial direction within the groove with respect to the face plate 2. It is a retainer (clamp plate) made of a plate, and the width is the object to be ground 3 on the spindle center 3 side.
Rectangular long hole 2 with a width sufficiently larger than the outer diameter of 0
4A is attached on the opposite side by screws 26.
これら保持子２３，２４はセンタ３部分で長孔
２３Ａ，２４Ａが十分に重なり合つて開口し、被
研削体３０を挿通可能としている。 These retainers 23 and 24 are open at the center 3 portion with long holes 23A and 24A sufficiently overlapping each other, so that the object to be ground 30 can be inserted therethrough.
以上の構成について、概略作用を説明する。両
センタ３，４間に被研削体３０が支持されるが、
この被研削体３０の外周の中心が支持軸心と偏心
しているとする。主軸の回転により、後述するよ
うに摺動子２１，２２は互いに離反する方向へ遠
心力によつて斥く。これによつてピン２５と挿通
孔２３Ｂが接して（実際には図のような隙間はな
く嵌合している）保持子２３も同様となるが、長
孔２３Ａの谷形の２辺は何れか１辺が被研削体３
０の外周に接する。さらに遠心力方向への移動は
被研削体３０の偏心外周に応じて他辺を当接する
方向へピン２５を中心として傾動し２辺で均等に
遠心力が作用するよう外周の中心に自動調心す
る。 The general operation of the above configuration will be explained. The object to be ground 30 is supported between both centers 3 and 4,
It is assumed that the center of the outer periphery of the object to be ground 30 is eccentric to the support axis. As the main shaft rotates, the sliders 21 and 22 are repelled by centrifugal force in a direction that separates them from each other, as will be described later. As a result, the pin 25 and the insertion hole 23B are in contact with each other (actually, they fit together without any gap as shown in the figure), and the same is true for the retainer 23, but the two sides of the valley shape of the elongated hole 23A are or one side is the object to be ground 3
Touches the outer circumference of 0. Furthermore, the movement in the direction of centrifugal force is tilted around the pin 25 in the direction of contacting the other side according to the eccentric outer circumference of the object to be ground 30, and self-aligns to the center of the outer circumference so that the centrifugal force acts evenly on the two sides. do.
一方、他方の摺動子２２も同様に移動しねじ２
６によつて一体の保持子２４も同様で、長孔２４
Ａの一辺は被研削体３０とは一点（１個所）のみ
で当接する。この長孔２４Ａの当接辺は移動方向
と直交しているから被研削体３０の偏心外周の状
態に左右されることのないことは容易に理解され
ようことから説明を省略する。 On the other hand, the other slider 22 also moves in the same way, and the screw 2
The same applies to the integral retainer 24 by 6, and the elongated hole 24
One side of A contacts the object to be ground 30 at only one point (one place). Since the abutting side of the elongated hole 24A is perpendicular to the moving direction, it is easily understood that it is not affected by the state of the eccentric outer periphery of the object to be ground 30, so a description thereof will be omitted.
以上のようにして、被研削体３０の外周は保持
子２３の長孔２３Ａの谷形の２辺（２個所）と、
保持子２４の長孔２４Ａの一辺（１個所）と当接
し、３辺（３個所）によつて無理なく確実に挟持
される。挟持後は相互に回転辷りを生じることは
ない。本装置によつて被研削体３０の研削精度を
センタ孔を基準として要求される望ましい真円
度、例えば外径2.5mmに対する真円度を0.5μｍと
することが確実に実現し得た。 As described above, the outer periphery of the object 30 to be ground is the two sides (two places) of the valley shape of the long hole 23A of the retainer 23,
It comes into contact with one side (one location) of the elongated hole 24A of the retainer 24, and is easily and securely held by the three sides (three locations). After being clamped, there will be no rotational slippage between them. With this apparatus, it was possible to reliably achieve the desired roundness of the grinding object 30 with respect to the center hole, for example, a roundness of 0.5 μm for an outer diameter of 2.5 mm.
第４図は全体の詳細な構成で、これによつて説
明すると、面板２には心押台側の端面に浅い円形
箱形の枠部材２８が開口面を心押台側として取着
されている。この枠部材２８の底板部分には主軸
１の軸心に直交し主軸側センタ３に対称に一対の
ガイド部材（キー）１５，１６が突出して一直線
上に設けられている。 FIG. 4 shows the detailed configuration of the whole, and to explain it, a shallow circular box-shaped frame member 28 is attached to the end face of the face plate 2 on the tailstock side, with the opening surface facing the tailstock. There is. A pair of guide members (keys) 15 and 16 are provided on the bottom plate of the frame member 28 in a straight line, perpendicular to the axis of the main spindle 1 and symmetrical to the center 3 on the main spindle side.
そうして、ガイド部材１５，１６にはほぼ半円
板形の錘体１３，１４のガイド溝（キー溝）が嵌
挿され、それぞれ錘体１３，１４を半径方向に摺
動可能としている。錘体１３，１４にはセンタ３
側を盲の段付穴が半径方向に形成されており、小
径の盲穴部分には補助圧縮コイルばね１９，２０
が挿入されている。 Guide grooves (key grooves) of weight bodies 13 and 14 having substantially semicircular plate shapes are fitted into guide members 15 and 16, respectively, so that weight bodies 13 and 14 can be slid in the radial direction. The center 3 is attached to the weight bodies 13 and 14.
A stepped hole with a blind side is formed in the radial direction, and auxiliary compression coil springs 19, 20 are installed in the small diameter blind hole part.
has been inserted.
錘体１３，１４の前面には摺動子２１，２２が
軸心と直交する方向に形成された凹溝内に嵌合さ
れて半径方向へ移動可能に設けられ、この摺動子
２１，２２からの突片２１Ａ，２２Ａが盲穴内に
突出し補助圧縮コイルばね１９，２０の外側端と
それぞれに接触して半径方向外側に向け押圧賦勢
されている。錘体１３，１４は突片２１Ａ，２２
Ａの嵌入する部分が切り欠かれており、この切り
欠きに沿つて摺動子２１，２２は相互い半径方向
へ移動可能である。 Sliders 21 and 22 are provided on the front surfaces of the weight bodies 13 and 14 so as to be movable in the radial direction by being fitted into grooves formed in a direction perpendicular to the axis. Projecting pieces 21A and 22A from the auxiliary compression coil springs 19 and 22 project into the blind hole, contact the outer ends of the auxiliary compression coil springs 19 and 20, respectively, and are biased toward the outside in the radial direction. The weight bodies 13 and 14 are protrusions 21A and 22
A portion into which A is inserted is cut out, and the sliders 21 and 22 are movable in the radial direction along this cutout.
段付穴の段部には座金３１，３２が嵌められ、
この座金３１，３２の外面と枠部材２８の内側面
間に主圧縮コイルばね１７，１８がそれぞれ挿入
装着されており、主圧縮コイルばね１７，１８そ
れぞれの押圧力は、補助圧縮コイルばね１９，２
０、錘体１３，１４等の重量のそれぞれの和より
も大きく、錘体１３，１４をセンタ３の軸心方向
に押圧しガイド部材１５，１６の外端面１５Ａ，
１６Ａに当接停止させている。 Washers 31 and 32 are fitted into the stepped portions of the stepped holes,
Main compression coil springs 17 and 18 are inserted between the outer surfaces of the washers 31 and 32 and the inner surface of the frame member 28, respectively. 2
0, the weights 13, 14 are pressed in the axial direction of the center 3 by a force larger than the sum of the respective weights of the weights 13, 14, etc., and the outer end surfaces 15A of the guide members 15, 16 are
It is stopped by contacting 16A.
錘体１３，１４の前面に形成された凹溝両側の
凸条の両側面及び前面の両端部が枠部材２８の開
口面に取着されたカバー２７によつて半径方向に
ガイドされる。従つてカバー２７は錘１３，１４
と摺動子２１，２２の押え、案内機能を兼ね備え
る。保持子２１，２２の前面には第３図に示した
摺動子２３，２４が装着されている。 Both side surfaces and both ends of the front surface of the convex strips on both sides of the grooves formed on the front surfaces of the weight bodies 13 and 14 are guided in the radial direction by a cover 27 attached to the opening surface of the frame member 28. Therefore, the cover 27 is connected to the weights 13 and 14.
It also has a holding and guiding function for the sliders 21 and 22. Sliders 23 and 24 shown in FIG. 3 are attached to the front surfaces of the retainers 21 and 22.
保持子２４と同形の保持子２９は間隔板を介し
て摺動子２２にねじ２６で取着されており、これ
によつて他方の保持子２３が摺動および傾動し得
るように規制し、かつ保持子２３のセンタ軸方向
へのたわみを押えている。 A retainer 29 having the same shape as the retainer 24 is attached to the slider 22 with a screw 26 via a spacer plate, thereby regulating the sliding and tilting of the other retainer 23. Moreover, the deflection of the retainer 23 in the direction of the center axis is suppressed.
以上の構成で主軸１が回転せずに停止している
時は主圧縮コイルばねの弾力によつて錘体１３，
１４がセンタ側に近寄り、保持子２３，２４の長
孔２３Ａ，２４Ａが大きく重なり合つて開口し、
被研削体３０の挿入を容易とし、センタ３，４間
に支持させることができる。 With the above configuration, when the main shaft 1 is stopped without rotating, the weight body 13,
14 approaches the center side, the long holes 23A and 24A of the retainers 23 and 24 overlap and open,
The object to be ground 30 can be easily inserted and supported between the centers 3 and 4.
次いで、主軸１を回転駆動すると錘体１３，１
４に大きな遠心力が生じ、主圧縮コイルばねを圧
縮して互いに遠ざかる。摺動子２１，２２には補
助圧縮コイルばね２０，２１を介して突片２１
Ａ，２２Ａに上記錘１３，１４の遠心力が作用
し、ピン２５、ねじ２６によつて保持子２３，２
４を遠心方向に移動させる。結果長孔２３Ａ，２
４Ａの２辺と１辺により前述の如くに被研削体３
０の外周に合わせて自動調心し挟持する。錘体１
３，１４の遠心力の作用は補助圧縮コイルばね２
０，２１を介して行われるので緩衝され被研削体
３０を衝撃的に挟持することが防止される。 Next, when the main shaft 1 is driven to rotate, the weight bodies 13,1
A large centrifugal force is generated at 4, compressing the main compression coil springs and causing them to move away from each other. The protruding pieces 21 are connected to the sliders 21 and 22 via auxiliary compression coil springs 20 and 21.
The centrifugal force of the weights 13 and 14 acts on A and 22A, and the retainers 23 and 2 are held together by the pins 25 and screws 26.
4 in the centrifugal direction. Result long hole 23A, 2
As mentioned above, the object to be ground 3 is
Self-centering and clamping according to the outer circumference of 0. Plumb 1
The centrifugal force of 3 and 14 is caused by the auxiliary compression coil spring 2.
0 and 21, it is buffered and the object to be ground 30 is prevented from being clamped with an impact.
被研削体３０の研削仕上げが終了し主軸１の回
転が停止されると、主圧縮コイルばね１７，１８
の復元力によつて錘体１３，１４は軸心方向に押
しやられ、これに伴なつて補助圧縮コイルばね２
０，２１も復元して突片２１Ａ，２２Ａを押圧し
摺動子２１，２２、保持子２３，２４を停止位置
状態とする。長孔２３Ａ，２４Ａが大きく重なり
合つて開口し、被研削体３０の挟持を解除するか
ら心押台センタ４を後退させて被研削体３０を取
出す。 When the grinding finish of the object to be ground 30 is finished and the rotation of the main shaft 1 is stopped, the main compression coil springs 17 and 18
The weight bodies 13 and 14 are pushed in the axial direction by the restoring force, and along with this, the auxiliary compression coil spring 2
0 and 21 are also restored and press the protrusions 21A and 22A to bring the sliders 21 and 22 and the retainers 23 and 24 to their stop positions. The elongated holes 23A and 24A overlap and open to release the object to be ground 30, so the tailstock center 4 is moved back and the object to be ground 30 is taken out.
本発明の保持子の長孔の形状は、上記実施例に
限らず、第５図に示したように保持子３４，３５
の長孔３４Ａ，３５Ａのように挟角をなす２辺
と、挟角に交わる１辺とからなり、反対側が円形
でなるものであつてもよく、第６図のように楕円
孔３６Ａの挟円部と２個所と円孔３７Ａの一辺を
直線とした保持子３６，３７であつてもよい。何
れにしても２個所で接触する長孔の接触角は鋭角
である程挟持力が大きいことはいうまでもない
が、自動離脱のためには摩擦角以上であることが
好ましい。 The shape of the elongated hole of the retainer of the present invention is not limited to the above embodiment, but as shown in FIG.
The long holes 34A and 35A in FIG. The retainers 36 and 37 may have a circular portion, two locations, and one side of the circular hole 37A that are straight lines. In any case, it goes without saying that the more acute the contact angle between the two elongated holes, the greater the clamping force, but for automatic release, it is preferably equal to or greater than the friction angle.
また、錘体の重量バランスはさほど気にするこ
となく、通常の加工公差、例えば±0.01mmでよ
い。 Further, the weight balance of the weight body need not be of much concern, and normal processing tolerances, for example, ±0.01 mm may be sufficient.
そのほか、実施例は主軸側センタが回転形であ
るが、主軸側センタの停止形（デツドセンタ）で
も当然実施可能なことはいうまでもない。上記実
施例は錘体１３，１４と保持子２３，２４との間
に摺動子２１，２２と補助圧縮コイルばね１９，
２０を介在させて間接的に動作させる構成とした
が、保持子２３，２４を錘体１３，１４に直接取
付ける構成とすることも本発明は可能であり、こ
のようにするとばね圧に依存しないことからより
強固な挟持状態が得られる。 In addition, in the embodiment, the spindle side center is of a rotating type, but it goes without saying that a stationary type (dead center) of the spindle side center can also be implemented. In the above embodiment, the sliders 21, 22 and the auxiliary compression coil spring 19 are provided between the weight bodies 13, 14 and the retainers 23, 24.
Although the present invention is configured to operate indirectly by interposing the retainers 23 and 20, it is also possible to configure the present invention to attach the retainers 23 and 24 directly to the weight bodies 13 and 14, and in this way, the retainers 23 and 24 are not dependent on spring pressure. Therefore, a stronger clamping state can be obtained.
以上説明のように本発明の研削装置の被研削体
保持装置によれば、構成が簡単であつて低コスト
であり、被研削体に損傷を与えることなく、被研
削体の外周状態に応じて無理なく追従して確実に
挟持し、回転中のバランス性にも勝れ、高精度な
研削仕上げが得られる実用上著るしい効果を奏す
る。
As explained above, according to the grinding object holding device of the grinding apparatus of the present invention, the structure is simple and low cost, and the device is able to hold the object to be ground according to the outer peripheral condition of the object to be ground without damaging the object to be ground. It follows smoothly, grips reliably, has excellent balance during rotation, and has a remarkable practical effect in achieving a high-precision grinding finish.
第１図は本特許出願にかかわる発明者等が先に
提案した保持装置の側断面、第２図イ，ロはそれ
ぞれ第１図による保持状態の被研削体の正常状態
と偏心状態の要部正面図、第３図は本発明保持装
置の一実施例要部正面視、第４図イは全体の側断
面、第４図ロはイ図のＭ−Ｍ断面、第５図、第６
図は異る実施例を示す。
図中、１は主軸、２は面板、３は主軸側セン
タ、４は心押台側センタ、９は保持装置、１０，
１０Ａ，３０は被研削体（被加工物）、５，６，
２３，２４，３４，３５，３６，３７は保持子、
５Ｂ，６Ｂ，２３Ａ，２４Ａ，３４Ａ，３５Ａ，
３６Ａ，３７Ａは長孔、１３，１４は錘体、１
７，１８は主圧縮コイルばね、１９，２０は補助
圧縮コイルばね、２１，２２は摺動子、２５はピ
ン、２６は止めねじ、２７はカバー、２８は枠部
材である。
Figure 1 is a side cross section of the holding device previously proposed by the inventors involved in this patent application, and Figures 2A and 2B are main parts of the workpiece in the normal state and eccentric state in the holding state shown in Figure 1, respectively. 3 is a front view of the main part of an embodiment of the holding device of the present invention, FIG. 4 A is a side cross section of the whole, FIG.
The figures show different embodiments. In the figure, 1 is the main shaft, 2 is the face plate, 3 is the main spindle side center, 4 is the tailstock side center, 9 is the holding device, 10,
10A, 30 is the object to be ground (workpiece), 5, 6,
23, 24, 34, 35, 36, 37 are retainers,
5B, 6B, 23A, 24A, 34A, 35A,
36A and 37A are long holes, 13 and 14 are pyramid bodies, 1
7 and 18 are main compression coil springs, 19 and 20 are auxiliary compression coil springs, 21 and 22 are sliders, 25 is a pin, 26 is a set screw, 27 is a cover, and 28 is a frame member.
Claims (1)
筒状の被研削体を支持せしめるとともに上記軸心
の直交方向の回転遠心力によつて半径方向の案内
部に沿つて互いに離反する一対の錘体にそれぞれ
設けられた被研削体保持子の孔に上記被研削体を
挿入し該孔位置の偏位に伴い孔の端面にて被研削
体の一端部を回転保持する研削装置において、上
記一対の被研削体保持子の一方は上記軸心と直交
する面上に孔側を傾動自在として端部を枢支しか
つ孔の被研削体保持側の形状を谷形として該谷形
の傾斜２辺で当接せしめ、他方の被研削体保持子
の孔を遠心移動方向と直交方向の一辺として該一
辺で当接せしめるようにしてなり、上記被研削体
を上記一方の傾斜２辺と他方の一辺との３辺で被
研削体の外周の中心位置に対応して外周を回転保
持することを特徴とする被研削体保持装置。1. A cylindrical object to be ground is supported between centers arranged oppositely on the same axis, and a pair of grinding objects are separated from each other along a radial guide part by rotational centrifugal force in a direction perpendicular to the axis. In the grinding device, the object to be ground is inserted into the hole of the object holder provided in each of the weight bodies, and one end of the object to be ground is rotationally held at the end surface of the hole as the position of the hole shifts. One of the pair of object-to-be-ground holders is pivotally supported at the end with the hole side tilting freely on a plane orthogonal to the axis, and the shape of the object-to-be-ground holding side of the hole is a valley, and the shape of the valley is inclined. The object to be ground is brought into contact with the two inclined sides of the one side and the other side is brought into contact with the hole of the other object to be ground as one side in the direction orthogonal to the centrifugal movement direction. A device for holding an object to be ground, characterized in that the outer periphery of the object to be ground is rotated and held in correspondence with the center position of the outer periphery of the object to be ground on three sides including one side of the object.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59036743A JPS60180742A (en) | 1984-02-28 | 1984-02-28 | Centering method for cylindrical grinding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59036743A JPS60180742A (en) | 1984-02-28 | 1984-02-28 | Centering method for cylindrical grinding machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60180742A JPS60180742A (en) | 1985-09-14 |
| JPH0122084B2 true JPH0122084B2 (en) | 1989-04-25 |
Family
ID=12478204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59036743A Granted JPS60180742A (en) | 1984-02-28 | 1984-02-28 | Centering method for cylindrical grinding machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60180742A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61159305A (en) * | 1984-12-18 | 1986-07-19 | Fujitsu Ltd | Workpiece holding device of grinding machine |
| JPH0767643B2 (en) * | 1985-12-19 | 1995-07-26 | 松下電器産業株式会社 | Workpiece check device |
| CN102366899B (en) * | 2011-09-14 | 2013-06-12 | 常州常瑞天力动力机械有限公司 | Centrifugal clamping device |
| CN105127893A (en) * | 2015-08-18 | 2015-12-09 | 洛阳轴研科技股份有限公司 | Positioning and clamping device for inner hole grinding |
| CN109262291B (en) * | 2018-08-16 | 2021-06-29 | 泰安大源机械有限公司 | Tool clamp capable of automatically adjusting size |
| CN112959120B (en) * | 2021-03-31 | 2022-03-29 | 深圳市太美亚电子科技有限公司 | Rapid centering device for processing cylinder center hole by utilizing handheld electric tool |
-
1984
- 1984-02-28 JP JP59036743A patent/JPS60180742A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60180742A (en) | 1985-09-14 |
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