JP2006315153A - Workpiece drive device for cylindrical grinding machine - Google Patents

Workpiece drive device for cylindrical grinding machine Download PDF

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JP2006315153A
JP2006315153A JP2005142291A JP2005142291A JP2006315153A JP 2006315153 A JP2006315153 A JP 2006315153A JP 2005142291 A JP2005142291 A JP 2005142291A JP 2005142291 A JP2005142291 A JP 2005142291A JP 2006315153 A JP2006315153 A JP 2006315153A
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workpiece
grinding machine
plate
gripping claw
drive device
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JP4191166B2 (en
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Koji Makita
浩司 牧田
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NAKAYAMA SEIKO KK
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NAKAYAMA SEIKO KK
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a workpiece drive device for a cylindrical grinding machine in which a workpiece can be easily gripped in work at both centers mainly with a grinding machine and which can adjust balance in weight, thus be adapted to high speed grinding. <P>SOLUTION: In a workpiece drive device 1 for cylindrical grinding machine, one end of a drive pin 11 for driving a gripping claw for gripping a workpiece is extended to a main spindle face plate of a grinding machine and inserted into an engagement recess (hole) formed on its surface plate. Thus, a driving arm (component number 12 in Fig.6) which is required in a conventional type workpiece drive device, can be eliminated, thus adjusting a weighty balance of the device in a favorable state. In addition, 3 to 6 gripping claws are provided for gripping the workpiece whose one end is D-cut, thereby setting three or more parts as grip contact points with the workpiece, making it possible to transmit a rotation by pressing a D-cut part by one gripping claw. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、円筒研削盤において、円柱状ワークを両センターにより支持すると共に、これを把持し、機械の回転を該ワークに伝えるためのワークドライブ装置に関する。   The present invention relates to a work drive device for supporting a columnar workpiece by both centers in a cylindrical grinder, gripping the workpiece, and transmitting the rotation of the machine to the workpiece.

両センターで保持された円柱状ワークの外周面を把持して主軸の回転を該ワークに伝達するクランプ装置に関しては種々のものがあるが、研削盤の主軸面板に付設した駆動軸がワーク把持爪板の一端に係合した構成とし、主軸の回転と共に該駆動軸が爪板に付勢を与えてワークを把持し、次いでワークを回転させ、次いで、主軸の回転が停止すると爪板への付勢が解消されてワークの把持を開放する機能の円筒研削盤用ワークドライブ装置が多く使用されている。 There are various types of clamping devices that grip the outer peripheral surface of a cylindrical workpiece held at both centers and transmit the rotation of the spindle to the workpiece, but the drive shaft attached to the spindle face plate of the grinding machine is the workpiece gripping claw The drive shaft is configured to engage with one end of the plate, and the drive shaft urges the claw plate with the rotation of the main shaft to grip the workpiece, and then rotates the workpiece. A work drive device for a cylindrical grinding machine having a function of releasing the force and releasing the work is often used.

その一例を挙げると、ワークを支持するテーパーシャンク２の先端外周面に第１ベアリング３と第２ベアリング５を嵌合し、この第１ベアリング３の外周には外輪４を、その内輪６の外周より大径の外輪４を第２ベアリング５にそれぞれ嵌合装着されており、その外輪４の裏面に軸支した駆動腕１２の先端を内輪６から導出したガイドピン６ａに係合させ、該駆動腕１２の基端を研削盤の主軸に付設した駆動軸１３に係合させて該駆動腕１２の動きにより内輪と外輪を逆方向に回転させ、外輪に立設した駆動ピン１１に基端を係合すると共にその中間を内輪６の表面に取付けたフロート板７に軸支１０した把持爪板９を回動させてワークＷを把持する構成の円筒研削盤用ワークドライブ装置４１（図６）がある（特許文献１）。   For example, the first bearing 3 and the second bearing 5 are fitted to the outer peripheral surface of the tapered shank 2 that supports the workpiece, the outer ring 4 is provided on the outer periphery of the first bearing 3, and the outer periphery of the inner ring 6 is provided. The outer ring 4 having a larger diameter is fitted and attached to the second bearing 5, and the tip of the drive arm 12 pivotally supported on the back surface of the outer ring 4 is engaged with the guide pin 6 a led out from the inner ring 6 to drive the drive. The base end of the arm 12 is engaged with the drive shaft 13 attached to the main shaft of the grinding machine, the inner ring and the outer ring are rotated in opposite directions by the movement of the drive arm 12, and the base end is set on the drive pin 11 erected on the outer ring. Work drive device 41 for a cylindrical grinding machine configured to grip a workpiece W by rotating a gripping claw plate 9 pivotally supported on a float plate 7 that is engaged with and attached to the surface of the inner ring 6 (FIG. 6). (Patent Document 1).

また、他の特許文献においては、主軸の前端側に軸受を介してクランプ本体を回転自在に外嵌させると共に、該クランプ本体にワークをクランプするための複数のクランプ爪を周方向等間隔に回転自在に軸支し、このクランプ本体の回動に連動して該クランプ爪がワークをクランプ又はアンクランプする研削盤用ワークドライブ装置が開示されている（特許文献２）。
特開平１１−３０９６５１号公報 実公平０７−０５３８４８号公報 In another patent document, a clamp body is rotatably fitted on the front end side of the main shaft via a bearing, and a plurality of clamp claws for clamping a workpiece to the clamp body are rotated at equal intervals in the circumferential direction. There has been disclosed a work drive device for a grinding machine that is freely supported and in which the clamp pawl clamps or unclamps the workpiece in conjunction with rotation of the clamp body (Patent Document 2).
JP-A-11-309651 No. 07-053848

前記の従来タイプの円筒研削盤用ワークドライブ装置においては円柱（または円筒）状のワークをクランプするには全く問題はなかったが、図５に示すような円柱体の一端をＤカットしたワークを把持することは困難で、図７（ａ）に示したように、２個のＶブロックを対向させてその内面の４点、ａ，ｂ，ｃ，ｄでワークを保持する、いわゆる「カニ爪クランプ」と称される方法が使用される。この場合、Ｖブロックとワークとの接触点が図７（ｂ）のように３箇所（ｂ、ｃ、ｄ）になると十分な保持強度が得られない。   In the above-mentioned conventional type of work drive device for a cylindrical grinding machine, there was no problem in clamping a columnar (or cylindrical) workpiece. However, as shown in FIG. It is difficult to grip, so as shown in FIG. 7 (a), two V blocks are opposed to each other, and the workpiece is held at four points a, b, c, d on the inner surface. A method called “clamping” is used. In this case, when the contact points between the V block and the workpiece are three places (b, c, d) as shown in FIG. 7B, sufficient holding strength cannot be obtained.

前記「かに爪クランプ」の方法は、ワークがＶブロックによって四点保持されるように当接の位置調製が必要であり、また、ワーク位置良好な把持精度を得ることもできないことが問題であった。   The “crab claw clamp” method requires adjustment of the contact position so that the workpiece is held at four points by the V-block, and the gripping accuracy with a good workpiece position cannot be obtained. there were.

また、従来タイプのワークドライブ装置においては、外径方向に突出する回転伝達レバーが付設されており、これを円筒研削盤用の面板に突設した駆動軸に係合させることによってワークの把持爪板を回動してワークを把持し、ワークドライブ装置と共に回転させているが、この回転伝達レバーおよび駆動軸が該ドライブ装置等の重量バランスを崩すことになる。このアンバランスがワークのスムーズな回転の障害となり、高速回転の必要な小径ワークの研削において研削面にビビリが生じ、真円が得られないという欠点があった。 Further, in the conventional type of work drive device, a rotation transmission lever that protrudes in the outer diameter direction is attached, and by engaging this with a drive shaft that protrudes from a face plate for a cylindrical grinding machine, a workpiece gripping claw is provided. The plate is rotated to grip the workpiece and rotated together with the workpiece drive device. However, the rotation transmission lever and the drive shaft break the weight balance of the drive device and the like. This unbalance is an obstacle to smooth rotation of the workpiece, and there has been a drawback in that grinding of a small-diameter workpiece requiring high-speed rotation causes chatter on the ground surface and a perfect circle cannot be obtained.

課題を解決するための手段として本発明請求項１に記載の発明は、円筒研削盤の主軸面板に嵌合装着されるシャンク付きセンターと、そのシャンク付きセンターの外周に第一ベアリングおよび第二ベアリングを介してそれぞれ回動自在に嵌合した外輪と内輪と、その内輪の端面に付設したフロート板に軸支され、かつ、末端を外輪表面から突出する把持爪駆動ピンの先端に係合した複数のワーク把持爪板とからなり、該内輪と外輪との相対的回動によって前記のワーク把持爪板がワークを把持しまたは開放するワークドライブ装置において、前記把持爪駆動ピンが外輪をその軸方向と平行に裏面にまで貫通してその基端を研削盤の主軸面板に形成の挿通孔に係合させることを手段とした。   As a means for solving the problems, the invention according to claim 1 of the present invention includes a center with a shank fitted to and mounted on a main surface plate of a cylindrical grinding machine, and a first bearing and a second bearing on the outer periphery of the center with the shank. A plurality of outer rings and inner rings that are rotatably fitted to each other, and which are pivotally supported by a float plate attached to the end face of the inner ring and engaged with the tip of a gripping claw driving pin that protrudes from the outer ring surface. A workpiece gripping claw plate, wherein the workpiece gripping claw plate grips or releases the workpiece by relative rotation between the inner ring and the outer ring. The base end of the grinding machine was engaged with an insertion hole formed in the main spindle face plate.

請求項２記載の発明は、円筒研削盤の主軸に嵌合装着されるシャンク付きセンターと、そのシャンク付きセンターの外周にそれぞれ回動自在に嵌合した外輪と内輪と、その内輪の端面に軸支された複数のワーク把持爪板と、前記円筒研削盤の主軸の回転を伝達する駆動ピンとからなるワークのドライブ装置において、ワーク把持爪板を３個以上６個以下であるものとした。 The invention according to claim 2 is a center with a shank fitted and mounted on a main shaft of a cylindrical grinding machine, an outer ring and an inner ring that are rotatably fitted to the outer periphery of the center with the shank, and a shaft on an end surface of the inner ring. In a workpiece drive device comprising a plurality of supported workpiece gripping claw plates and a drive pin that transmits the rotation of the spindle of the cylindrical grinding machine, the number of workpiece gripping claw plates is 3 or more and 6 or less.

請求項３記載の発明は、円筒研削盤の主軸に嵌合装着されるシャンク付きセンターと、そのシャンク付きセンターの外周にそれぞれ回動自在に嵌合した外輪と内輪と、その内輪の端面に軸支された複数のワーク把持爪板と、前記円筒研削盤の主軸の回転を伝達する駆動ピンとからなるワークのドライブ装置において、ワーク把持爪板を１個としたものである。 The invention according to claim 3 is a center with a shank fitted and mounted on a main shaft of a cylindrical grinding machine, an outer ring and an inner ring that are rotatably fitted to the outer periphery of the center with the shank, and a shaft on an end surface of the inner ring. In a workpiece drive device comprising a plurality of supported workpiece gripping claw plates and a drive pin that transmits the rotation of the spindle of the cylindrical grinding machine, one workpiece gripping claw plate is provided.

本発明ワークドライブ装置は、上記の構成としたことにより、装置の単純化と回転におけるバランスの安定を実現した。したがって、高速回転を必要とする小径ワークの研削においてしてもアンバランスを生じることなく、良好な研削精度が得られる。また、ワーク把持爪板を４枚以上装着することによって一端をＤカットされたワークをも偏芯することなく把持し、研削できるものとなった。 The work drive device of the present invention has the above-described configuration, thereby realizing simplification of the device and stable balance in rotation. Therefore, even when grinding a small-diameter workpiece that requires high-speed rotation, good grinding accuracy can be obtained without causing imbalance. In addition, by mounting four or more workpiece gripping claw plates, it is possible to grip and grind a workpiece having one D-cut end without eccentricity.

テーパーシャンク付きセンター２の先端部外周にベアリング３、５を隣接して圧入嵌合し、そのベアリング３には外輪をベアリング５には内輪を装着する。その内輪の表面には先端を把持爪、基端を駆動端とするワーク把持爪板一個または複数個を等角度に軸支し、前記外輪を貫通する複数の駆動ピンはその先端を各々のワーク把持爪板の駆動端に係合させ、その基端を円筒研削盤の主軸面板係合凹部（孔）に係合可能に構成するものである。   Bearings 3 and 5 are press-fitted and fitted adjacent to the outer periphery of the tip of the center 2 with the taper shank, and an outer ring is attached to the bearing 3 and an inner ring is attached to the bearing 5. One or more workpiece gripping claw plates having a tip end as a grip claw and a base end as a drive end are pivotally supported on the surface of the inner ring at equal angles, and a plurality of drive pins penetrating the outer ring have their tips at the respective workpieces. The gripping claw plate is engaged with the drive end, and the base end thereof is configured to be engageable with the main shaft surface plate engaging recess (hole) of the cylindrical grinding machine.

本発明に係る円筒研削盤用ワークドライブ装置１の実施例について図面を参照して説明する。図１に示すように本装置１は、円筒研削盤の主軸内径にテーパ嵌合するシャンク２において、その前端部に第１ベアリング３（玉軸受）を圧入嵌合し、その第１ベアリング３の外周にカップ状外輪４を嵌合装着し、さらに、前記第１ベアリング３に接してその先端側に第２ベアリング５を圧入嵌合してその外周に内輪６を装着している。この内輪６は前記外輪４のカップ状部内に収容される構成にしているがこれに限るものではない。この内輪６の表面には、リング状フロート板７がその取付け孔７ａより小径の首部になるボルト８をもってねじ取着され、該内輪６の表面との間で直径方向への揺動が可能になっている。 An embodiment of a work drive device 1 for a cylindrical grinding machine according to the present invention will be described with reference to the drawings. As shown in FIG. 1, the apparatus 1 has a first bearing 3 (ball bearing) press-fitted into a front end portion of a shank 2 that is tapered to the inner diameter of a main shaft of a cylindrical grinding machine. A cup-shaped outer ring 4 is fitted and mounted on the outer periphery, and a second bearing 5 is press-fitted and fitted on the tip side of the first bearing 3 and an inner ring 6 is mounted on the outer periphery thereof. The inner ring 6 is configured to be accommodated in the cup-shaped portion of the outer ring 4, but is not limited thereto. A ring-shaped float plate 7 is screwed to the surface of the inner ring 6 with a bolt 8 having a neck having a smaller diameter than the mounting hole 7a, and can swing in the diametrical direction with the surface of the inner ring 6. It has become.

ワーク把持爪板９はその先端把持爪部９ａをカム状の円弧に形成し、その基端はＵ字形溝部９ｂに切り欠いた駆動端としたもので、１個ないし複数個（図２では３個）の把持爪板９を前記リング状フロート板７の表面に円周方向等分割の位置に軸１０により回動自在に軸支せられている。 The workpiece gripping claw plate 9 has a tip gripping claw portion 9a formed in a cam-shaped arc, and a base end thereof as a driving end cut out in a U-shaped groove portion 9b. ) Gripping claw plates 9 are pivotally supported on the surface of the ring-shaped float plate 7 so as to be rotatable by a shaft 10 at equally circumferential positions.

前記カップ状外輪４にはその表面から裏面まで、軸方向に貫通する挿通孔４ａ，４ａが開口されており、そこに挿通された駆動ピン１１、１１はその先端１１ａを前記把持爪板９の駆動端（Ｕ字形溝部）９ｂに係合させ、その基端１１ｂは該カップ状外輪４の裏面より突出させている。 The cup-shaped outer ring 4 is provided with insertion holes 4a and 4a penetrating in the axial direction from the front surface to the rear surface, and the drive pins 11 and 11 inserted therethrough have their tips 11a attached to the gripping claw plate 9. The drive end (U-shaped groove) 9 b is engaged, and the base end 11 b is projected from the back surface of the cup-shaped outer ring 4.

前記の円筒研削盤の主軸面板１５には係合凹部として、例えば前記の駆動ピン１１が挿通する係合凹部１５ａ、または、図示していないが主軸面板１５の中心より放射状に３〜６本の溝状段部が予め刻設され、または、刻設された面板が付着されている。 The main shaft surface plate 15 of the cylindrical grinding machine has, as engagement recesses, for example, an engagement recess 15a through which the drive pin 11 is inserted, or 3 to 6 radially from the center of the main surface plate 15 (not shown). A groove-shaped stepped portion is preliminarily engraved, or an engraved face plate is attached.

上記の実施例について、その使用方法を説明すると、先ず、前記駆動ピン１１の基端を使用する研削盤の主軸面板１５に形成した係合凹部１５ａに係合するようにしてテーパーシャンク部２を円筒研削盤の主軸孔に挿通し固く嵌合させる。 The use method of the above embodiment will be described. First, the taper shank portion 2 is engaged with the engagement recess 15a formed in the main spindle 15 of the grinding machine using the base end of the drive pin 11. Insert into the spindle hole of the cylindrical grinding machine and fit firmly.

次いで、円筒研削盤の主軸面板１５を時計回り方向に若干回転すると該主軸面板１５に係合している駆動ピン１１，１１が同方向に回動し、この駆動ピン１１が挿通している外輪４およびその先端を係合しているワーク把持爪板９の駆動端９ｂを同方向に回動させることになる。これによって、内輪６とは相対的に逆回転し、したがって、ワーク把持爪板９の先端爪部９ａが軸支部を支点として回動することになり各把持爪９ａ，９ａは開放する方向に動く。 Next, when the main shaft face plate 15 of the cylindrical grinding machine is slightly rotated in the clockwise direction, the drive pins 11 engaged with the main shaft face plate 15 rotate in the same direction, and the outer ring through which the drive pin 11 is inserted. 4 and the driving end 9b of the workpiece gripping claw plate 9 engaging the tip thereof are rotated in the same direction. As a result, it rotates in the opposite direction relative to the inner ring 6, and therefore the tip claw portion 9 a of the workpiece gripping claw plate 9 rotates about the shaft support portion, and each gripping claw 9 a, 9 a moves in the opening direction. .

次いで、テーパーシャンク部２の先端２ｂと円筒研削盤の芯押し台側センター１６とによりワークＷの両端センター穴を支持し、該円筒研削盤の主軸を反時計回り（正回転）に駆動する。これによって外輪４とワーク把持爪板９の駆動端９ｂは前記とは逆方向の作動をして把持爪９ａ，９ａがワークＷを把持する方向に回動して把持し、その後、機械の回転をワークに伝達することになる。若し、このワークＷの両端に設けたセンター穴がその外径に対して偏心した位置にあった場合、前記のフロート板７が直径方向に摺動して把持することになり、両センター２ｂ、１６によるワーク支持に異常な偏心荷重を与えることがない。このようにワークを保持し、グラインダーＧで研削が行なわれる。 Next, both end center holes of the workpiece W are supported by the tip 2b of the taper shank portion 2 and the center push stand side center 16 of the cylindrical grinder, and the main shaft of the cylindrical grinder is driven counterclockwise (forward rotation). As a result, the outer ring 4 and the drive end 9b of the workpiece gripping claw plate 9 operate in the opposite direction to the above, and the gripping claws 9a and 9a rotate and grip in the direction in which the workpiece W is gripped. Will be transmitted to the workpiece. If the center holes provided at both ends of the workpiece W are in a position eccentric to the outer diameter, the float plate 7 slides and grips in the diametrical direction, and both centers 2b , 16 does not give an abnormal eccentric load to the work support. In this manner, the workpiece is held and grinding is performed by the grinder G.

駆動ピン１１、１１により該主軸面板１５と直結された外輪４およびワーク把持爪板９の駆動端９ｂは主軸の回転が停止すると同時に回動をとめるが、内輪６は回転惰力により停止が遅れる。その遅れによりワーク把持爪９ａによる把持は自動的に開放され、作業者は芯押し台側センター２３の押圧を解除してワークを取り外すことが可能になる。次いで、新たなワークが前記の把持工程により機械に取付けられ研削が継続されることになる。 The outer ring 4 directly connected to the main shaft face plate 15 by the drive pins 11 and 11 and the driving end 9b of the work gripping claw plate 9 stop rotating at the same time as the main shaft stops rotating, but the inner ring 6 stops being delayed by the rotational repulsive force. . Due to the delay, the gripping by the workpiece gripping claw 9a is automatically released, and the operator can release the press of the core push stand side center 23 and remove the workpiece. Next, a new workpiece is attached to the machine by the above gripping process, and grinding is continued.

図３には実施例２に係るワークドライブ装置２１を示した。これは５個のワーク把持爪板９を前記フロート板７に軸支したことを特徴とするもので、該把持爪板９の基端であるそれぞれのＵ字形溝部９ｂ、９ｂには駆動ピン１１，１１の先端が係合し、駆動ピン１１の基端は研削盤の主軸面板１５に係合していること、その他の機構、符号は前記と同様であり説明を省略する。このワークドライブ装置２１においては、図５に示すような一端に直径の１/４程度の深さにDカットされたワークに対して把持爪９ａが４点で接触保持することが可能になる。なお、このワーク把持爪板９は６個程度まで装着することができる。このワーク把持爪板９の数の増加とともに把持爪９ａ先端を細く形成することが必要になるが、ワークの把持圧力はその把持爪９ａのそれぞれに分散されるので強度的には問題がない。 FIG. 3 shows a work drive device 21 according to the second embodiment. This is characterized in that five workpiece gripping claw plates 9 are pivotally supported on the float plate 7, and each U-shaped groove 9 b, 9 b, which is the base end of the gripping claw plate 9, has a drive pin 11. , 11 are engaged, and the base end of the drive pin 11 is engaged with the spindle plate 15 of the grinding machine, the other mechanisms and symbols are the same as described above, and the description thereof is omitted. In this work drive device 21, the gripping claws 9 a can be held in contact with four points on a work that has been D-cut to a depth of about ¼ of the diameter at one end as shown in FIG. 5. Note that up to about six workpiece gripping claw plates 9 can be mounted. As the number of workpiece gripping claw plates 9 increases, it is necessary to make the tips of the gripping claws 9a thinner. However, since the gripping pressure of the workpiece is distributed to each of the gripping claws 9a, there is no problem in strength.

図４には実施例３に係るワークドライブ装置３１を示す。この実施例は、前記フロート板７にワーク把持爪板９を１個のみ軸支したことを特徴とするもので、該把持爪板９のＵ字形溝部９ｂには駆動ピン１１の先端１１ａが係合し、その駆動ピン１１の基端１１ｂは研削盤の主軸面板の係合凹部１５ａに係合していることは前記と同様である。その他の機構および符号は前記と同様であり説明を省略する。このワークドライブ装置３１が適用されるのは図５に示すように一端をＤカットしたワークであって、研削盤の回転と共に把持爪板９の先端把持爪９ａが該Ｄカット部に当接し、ワークを中心方向に押圧して回転を伝達するものである。 FIG. 4 shows a work drive device 31 according to the third embodiment. This embodiment is characterized in that only one workpiece gripping claw plate 9 is pivotally supported on the float plate 7, and the tip 11 a of the drive pin 11 is engaged with the U-shaped groove portion 9 b of the gripping claw plate 9. In addition, the base end 11b of the drive pin 11 is engaged with the engagement recess 15a of the main surface plate of the grinding machine as described above. Other mechanisms and symbols are the same as described above, and a description thereof will be omitted. This work drive device 31 is applied to a work having one end D-cut as shown in FIG. 5, and the tip gripping claw 9a of the gripping claw plate 9 comes into contact with the D-cut portion as the grinding machine rotates. The rotation is transmitted by pressing the work in the center direction.

ワークドライブ装置は主として円筒研削盤に使用されるが、シャフト類のワークを両センターにより支持しその芯振れを計測する場合にも使用される。特に、回転におけるバランスに配慮した本発明ワークドライブ装置は高速回転が望まれる小径ワークの円筒研削に有効に使用される。また、一端にＤカットがなされたワークを把持することも可能で機械加工業において重宝されるものである。 The work drive device is mainly used for a cylindrical grinding machine, but is also used when a shaft type work is supported by both centers and the center runout is measured. In particular, the work drive device of the present invention considering the balance in rotation is effectively used for cylindrical grinding of a small-diameter workpiece for which high-speed rotation is desired. Further, it is possible to grip a workpiece having a D cut at one end, which is useful in the machining industry.

本発明に係る円筒研削盤用ワークドライブ装置の実施例を示した横断面図である。It is the cross-sectional view which showed the Example of the work drive apparatus for cylindrical grinding machines which concerns on this invention. 図１の正面図である。It is a front view of FIG. 本発明に係る円筒研削盤用ワークドライブ装置の第２の実施例を示した正面図である。It is the front view which showed the 2nd Example of the work drive apparatus for cylindrical grinding machines which concerns on this invention. 本発明に係る円筒研削盤用ワークドライブ装置の第３の実施例を示した正面図である。It is the front view which showed the 3rd Example of the work drive apparatus for cylindrical grinding machines which concerns on this invention. 一端をＤカットした円柱形ワークを示した斜視図である。It is the perspective view which showed the cylindrical workpiece | work which D-cut one end. 従来例の一つとして示した円筒研削盤用ワークドライブ装置である。It is the work drive device for cylindrical grinders shown as one of the prior art examples. 従来例に係るかに爪クランプの一例を示した正面図である。It is the front view which showed an example of the claw clamp which concerns on a prior art example.

符号の説明Explanation of symbols

１ 円筒研削盤用ワークドライブ装置
２ シャンク付きセンター
３ 第１ベアリング
４ カップ状外輪
５ 第２ベアリング
６ 内輪
７ フロート板
８ ボルト
９ 把持爪板
１０ 軸
１１ 駆動ピン
１２ 駆動腕
１３ 駆動軸
１５ 円筒研削盤の主軸面板
１５ａ 係合凹部 DESCRIPTION OF SYMBOLS 1 Work drive device 2 for cylindrical grinders Center 3 with shank 1st bearing 4 Cup-shaped outer ring 5 Second bearing 6 Inner ring 7 Float plate 8 Bolt 9 Grip claw plate 10 Axis 11 Drive pin 12 Drive arm 13 Drive shaft 15 Cylindrical grinder Main shaft face plate 15a engaging recess

Claims (3)

円筒研削盤の主軸面板（１５）に嵌合装着されるシャンク付きセンター（２）と、そのシャンク付きセンターの外周に第一ベアリング（３）および第二ベアリング（５）を介してそれぞれ回動自在に嵌合した外輪（４）と内輪（６）と、その内輪の端面に付設したフロート板（７）に軸支され、かつ、末端を外輪表面から突出する把持爪板駆動ピン（１１）の先端（１１ａ）に係合した複数のワーク把持爪板（９）とからなり、該内輪と外輪の差動によって前記のワーク把持爪板がワークを把持しまたは開放するワークドライブ装置において、前記把持爪板駆動ピン（１１）が外輪の裏面を貫通してその基端（１１ｂ）を研削盤の主軸面板に形成した係合凹部（１５ａ）に係合させたことを特徴とする円筒研削盤用ワークドライブ装置。 A center (2) with a shank to be fitted and mounted on the spindle face plate (15) of the cylindrical grinding machine, and the outer periphery of the center with the shank can be rotated via a first bearing (3) and a second bearing (5), respectively. Of the gripping claw plate drive pin (11) pivotally supported by the outer ring (4) and the inner ring (6) fitted to the inner ring, and the float plate (7) attached to the end face of the inner ring and projecting the end from the surface of the outer ring In the work drive device, which includes a plurality of workpiece gripping claw plates (9) engaged with the tip (11a), the workpiece gripping claw plate grips or releases the workpiece by the differential between the inner ring and the outer ring. For a cylindrical grinder characterized in that the claw plate drive pin (11) penetrates the back surface of the outer ring and its base end (11b) is engaged with an engagement recess (15a) formed in the main spindle face plate of the grinder. Work drive device. 円筒研削盤の主軸面板（１５）に嵌合装着されるシャンク付きセンター（２）と、そのシャンク付きセンターの外周に第一ベアリング（３）および第二ベアリング（５）を介してそれぞれ回動自在に嵌合した外輪（４）と内輪（６）と、その内輪の端面に付設したフロート板（７）に軸支され、かつ、末端を外輪の表面に突出する把持爪板駆動ピン（１１）の先端（１１ａ）に係合した複数のワーク把持爪板（９）とからなる円筒研削盤用ワークドライブ装置において、ワーク把持爪板が３個以上６個以下であることを特徴とする請求項１記載の円筒研削盤用ワークドライブ装置。 A center (2) with a shank to be fitted and mounted on the spindle face plate (15) of the cylindrical grinding machine, and the outer periphery of the center with the shank can be rotated via a first bearing (3) and a second bearing (5), respectively. Gripping claw plate drive pin (11) pivotally supported by an outer ring (4) and an inner ring (6) fitted to the inner ring, and a float plate (7) attached to the end face of the inner ring, and having a terminal projecting from the surface of the outer ring A workpiece drive claw plate for a cylindrical grinding machine comprising a plurality of workpiece gripping claw plates (9) engaged with a tip (11a) of the workpiece, wherein the number of workpiece gripping claw plates is 3 or more and 6 or less. 2. A work drive device for a cylindrical grinding machine according to 1. 円筒研削盤の主軸に嵌合装着されるシャンク付きセンター（２）と、そのセンターの外周にそれぞれ回動自在に嵌合された外輪（４）と内輪（６）と、その内輪の端面に付設したフロート板（７）に軸支された複数のワーク把持爪板（９）と、外輪またはワーク把持爪板に係合して研削盤の回転を伝達する駆動ピンとからなるワークのドライブ装置において、ワーク把持爪板が１個であることを特徴とする円筒研削盤用ワークドライブ装置。 A center with a shank (2) fitted to the main shaft of a cylindrical grinding machine, an outer ring (4) and an inner ring (6) fitted to the outer periphery of the center, respectively, and an end face of the inner ring A workpiece drive device comprising a plurality of workpiece gripping claw plates (9) pivotally supported by the float plate (7) and a drive pin that engages with the outer ring or the workpiece gripping claw plate and transmits the rotation of the grinding machine, A work drive device for a cylindrical grinding machine, characterized in that there is one workpiece gripping claw plate.
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