JP2012024862A - Chucking device - Google Patents

Chucking device Download PDF

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JP2012024862A
JP2012024862A JP2010162919A JP2010162919A JP2012024862A JP 2012024862 A JP2012024862 A JP 2012024862A JP 2010162919 A JP2010162919 A JP 2010162919A JP 2010162919 A JP2010162919 A JP 2010162919A JP 2012024862 A JP2012024862 A JP 2012024862A
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workpiece
gripping
chuck device
center pin
cylinder
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JP5592184B2 (en
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Yoshiaki Araki
義昭 荒木
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Komatsu NTC Ltd
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Komatsu NTC Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a chucking device capable of centering a workpiece with high accuracy without generating any inclination, and of holding it.SOLUTION: The chucking device includes an operation member 14 which is advanced/separated to/from an outer circumference of the workpiece W, a cylinder 15 for executing the advancing/separating operation of the operation member 14, and a center pin 16 to be fitted to a center hole Wa in an end face of the workpiece W. The operation member 14 comprises a slide part 21, and a holding member 22 which is supported by the slide part 21 to hold the outer circumference of the workpiece W, and moved with respect to the slide part 21 as the workpiece is held. A cam mechanism 34 for moving the holding member 22 is provided between the slide part 21 and the holding member 22 so that the workpiece W held by the holding member 22 is drawn toward the center pin 16 side.

Description

この発明は、研削盤等の工作機械において、ワークの端部をセンタリングした状態で把持するためのチャック装置に関するものである。   The present invention relates to a chuck device for gripping a workpiece in a centered state in a machine tool such as a grinding machine.

従来、この種のチャック装置としては、例えば特許文献1に開示されるような構成が提案されている。この従来構成においては、ジョウアクチュエータが軸を中心に揺動されることにより、その先端の把持爪がワークの外周面に対して接近または離間されて、ワークが把持または解放される。そして、把持爪によりワークが把持されるときには、ジョウアクチュエータの揺動により、ワークが把持状態で後方に引き込まれて、ワークの端面のボス孔が固定センタに挿入され、ワークのセンタリングが行われる。   Conventionally, for example, a configuration as disclosed in Patent Document 1 has been proposed as this type of chuck device. In this conventional configuration, when the jaw actuator is swung about the axis, the gripping claw at the tip approaches or separates from the outer peripheral surface of the workpiece, and the workpiece is gripped or released. When the workpiece is gripped by the gripping claws, the workpiece is pulled backward in the gripping state by the swing of the jaw actuator, the boss hole on the end surface of the workpiece is inserted into the fixed center, and the workpiece is centered.

特開2006−102858号公報JP 2006-102858 A

ところが、この従来のチャック装置においては、把持爪がジョウアクチュエータにボルトによって固定されている。このため、ワークが把持爪により外周から把持された状態で、ジョウアクチュエータの揺動により後方に引き込み移動される際に、ワークのボス孔と固定センタとが正確に対応せず、センタリング不良のおそれがある。すなわち、ワークの端面のボス孔がワークの軸心位置に正確に加工されていない場合も多く、このようなワークを把持してセンタリングしようとすると、ワークが把持状態で傾いたり、固定センタに対して偏心したりする結果となる。従って、このような場合は、ワークに対して高精度加工を施すことができない。   However, in this conventional chuck device, the gripping claws are fixed to the jaw actuator with bolts. For this reason, when the work is gripped from the outer periphery by the gripping claws, the work boss hole and the fixed center do not accurately correspond to each other when the jaw actuator swings and moves, and there is a risk of poor centering. There is. That is, there are many cases where the boss hole on the end face of the workpiece is not precisely machined to the axial center position of the workpiece. Result in eccentricity. Therefore, in such a case, high-precision machining cannot be performed on the workpiece.

この発明は、このような従来の技術に存在する問題点に着目してなされたものである。その目的は、ワークを傾いたり、偏心したりすることなく高精度にセンタリングして把持することができるチャック装置を提供することにある。   The present invention has been made paying attention to such problems existing in the prior art. An object of the present invention is to provide a chuck device capable of centering and gripping with high accuracy without tilting or decentering a workpiece.

上記の目的を達成するために、この発明は、ワークの外周に対して接近離間可能な作動部材と、その作動部材を接近離間動作させるための駆動手段と、ワークの端面のセンタ孔に嵌合されるセンタピンとを備えたチャック装置において、前記作動部材は、本体部と、その本体部に移動可能に支持され、ワークの外周を把持する把持部材とを有し、前記本体部と把持部材との間には、ワークが把持部材に把持された状態における作動部材の把持方向への移動を、把持部材のワーク引き込み方向への移動に変換させるカム手段を設けたことを特徴としている。   In order to achieve the above-mentioned object, the present invention is fitted to an operating member that can be moved closer to and away from the outer periphery of the workpiece, a driving means for moving the moving member closer to and away from, and a center hole on the end surface of the workpiece. In the chuck apparatus including the center pin, the operating member includes a main body portion and a gripping member that is movably supported by the main body portion and grips an outer periphery of the work, and the main body portion and the gripping member In the meantime, there is provided a cam means for converting the movement of the operating member in the gripping direction in a state where the workpiece is gripped by the gripping member into the movement of the gripping member in the workpiece retracting direction.

従って、この発明のチャック装置において、ワークを把持する場合には、駆動手段が駆動されると、作動部材がワークに向かって接近動作されて、その作動部材の把持部材によりワークの外周が把持される。この状態で、作動部材がさらに接近動作されると、カム手段のカム作用により、作動部材の移動が把持部材のワーク引き込み移動に変換され、把持部材に把持されたワークがセンタピン側に引き込まれる。このため、ワークの端面のセンタ孔がセンタピンに嵌合されて、ワークのセンタリングが行われる。よって、ワークの先端外周面及びワークの端面のセンタ孔が高精度に加工されていない場合でも、ワークを傾きが生じることなく高精度にセンタリングして把持することができる。   Therefore, in the chuck device of the present invention, when the workpiece is gripped, when the driving means is driven, the operating member is moved toward the workpiece and the outer periphery of the workpiece is gripped by the gripping member of the operating member. The In this state, when the actuating member is further moved closer, the movement of the actuating member is converted into a workpiece retracting movement of the gripping member by the cam action of the cam means, and the workpiece gripped by the gripping member is pulled to the center pin side. For this reason, the center hole of the end surface of the work is fitted to the center pin, and the work is centered. Therefore, even when the outer peripheral surface of the workpiece and the center hole of the workpiece end surface are not machined with high accuracy, the workpiece can be centered and gripped with high accuracy without causing tilt.

前記の構成において、前記カム手段は、本体部と把持部材との間に設けられたカム面を備えていることが望ましい。
前記の構成において、前記センタピンをその軸線方向に沿って移動可能にするとともに、センタピンを緩衝しながら後退させる緩衝手段を設けることが好ましい。
In the above configuration, it is desirable that the cam means includes a cam surface provided between the main body portion and the gripping member.
In the above configuration, it is preferable to provide a buffering means for allowing the center pin to move along the axial direction and for retracting the center pin while buffering.

前記の構成において、前記駆動手段をシリンダによって構成し、そのシリンダの軸線を前記作動部材の移動方向と平行な面に沿うように配置することが好ましい。
前記の構成において、前記本体部と把持部材との間には、緩衝部材を設けることが望ましい。
In the above-described configuration, it is preferable that the driving means is constituted by a cylinder, and the axis of the cylinder is arranged along a plane parallel to the moving direction of the operating member.
In the above configuration, it is desirable to provide a buffer member between the main body and the gripping member.

前記の構成において、前記シリンダとしてタンデム型シリンダを用いることが好ましい。   In the above configuration, it is preferable to use a tandem cylinder as the cylinder.

以上のように、この発明によれば、ワークが傾いたり、偏心したりすることなく高精度にセンタリングして把持することができるという効果を発揮する。   As described above, according to the present invention, there is an effect that the work can be centered and gripped with high accuracy without being tilted or decentered.

一実施形態のチャック装置を示す斜視図。The perspective view which shows the chuck device of one Embodiment. 図1のチャック装置の側面図。The side view of the chuck apparatus of FIG. 同チャック装置のカバーを取り外すとともに部分的に断面にして示す平面図。The top view which removes the cover of the chuck apparatus and is shown partially in cross section. 図2の4−4線における断面図。Sectional drawing in the 4-4 line | wire of FIG. 図2の5−5線における部分拡大断面図。FIG. 5 is a partially enlarged sectional view taken along line 5-5 in FIG. 図4の動作状態を示す部分断面図。The fragmentary sectional view which shows the operation state of FIG. シャッターカバー関係の構成部材を示す斜視図。The perspective view which shows the structural member regarding a shutter cover.

以下に、この発明を具体化したチャック装置の一実施形態を、図面に従って説明する。
図1及び図2に示すように、チャック装置のハウジング11は側面円形状に形成され、図3及び図4に示すように、そのハウジング11の中央部には上下に開口する収容部12が形成されている。ハウジング11の上下外周面には、前記収容部12の開口を覆うためのカバー13が取り付けられている。ハウジング11の一端部(図4の右端部,ワークW側)には、一対の作動部材14がワークWの外周に対して接近離間する方向へ移動可能に支持されている。
Hereinafter, an embodiment of a chuck device embodying the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the housing 11 of the chuck device is formed in a side circular shape, and as shown in FIGS. 3 and 4, a housing portion 12 that opens up and down is formed at the center of the housing 11. Has been. A cover 13 for covering the opening of the accommodating portion 12 is attached to the upper and lower outer peripheral surfaces of the housing 11. A pair of operating members 14 are supported at one end of the housing 11 (the right end in FIG. 4, the workpiece W side) so as to be movable toward and away from the outer periphery of the workpiece W.

ハウジング11の収容部12内には、両作動部材14を接近離間動作させるための駆動手段としてのシリンダ15が設けられている。
図2及び図4に示すように、前記両作動部材14間においてハウジング11の一端部の軸心位置には、ワークWの端面のセンタ孔Waに嵌合可能なセンタピン16が配設されている。このセンタピン16は、ハウジング11の軸心位置に設けられた支持部材17に軸線方向へ移動可能に支持されている。センタピン16と支持部材17との間には緩衝手段としてのバネ18が介在されており、このバネ18によりセンタピン16が移動範囲の前端(突出)位置で弾性的に保持される。
A cylinder 15 is provided in the housing portion 12 of the housing 11 as a driving means for moving the operating members 14 close to and away from each other.
As shown in FIGS. 2 and 4, a center pin 16 that can be fitted into the center hole Wa on the end surface of the workpiece W is disposed at the axial center position of one end portion of the housing 11 between the operating members 14. . The center pin 16 is supported by a support member 17 provided at the axial center position of the housing 11 so as to be movable in the axial direction. A spring 18 as a buffer means is interposed between the center pin 16 and the support member 17, and the center pin 16 is elastically held at the front end (protrusion) position of the moving range by the spring 18.

図4に示すように、前記作動部材14は前記収容部12内に位置する伝動部材25と、収容部12の前端開口に位置し、前記伝動部材25にボルト24によって固定された被ガイド部材23とを備えている。前記伝動部材25は、図3に示すように、収容部12の開口部においてハウジング11の案内部11aに案内されて図1の上下方向にスライドする。従って、前記作動部材14は、前記案内部11aにより、ワークWの軸線と交差する方向に移動可能に案内される。図4に示すように、前記伝動部材25には支点軸26がねじ込まれて固定されており、ワークWを把持する後述の把持部材22を持つ支持部材27は支点軸26を中心に微少角度回動可能である。   As shown in FIG. 4, the actuating member 14 is a transmission member 25 located in the accommodating portion 12, and a guided member 23 located at the front end opening of the accommodating portion 12 and fixed to the transmission member 25 by a bolt 24. And. As shown in FIG. 3, the transmission member 25 is guided by the guide portion 11 a of the housing 11 at the opening of the housing portion 12 and slides in the vertical direction of FIG. 1. Accordingly, the operating member 14 is guided by the guide portion 11a so as to be movable in a direction intersecting the axis of the workpiece W. As shown in FIG. 4, a fulcrum shaft 26 is screwed and fixed to the transmission member 25, and a support member 27 having a gripping member 22, which will be described later, grips the workpiece W is rotated by a small angle around the fulcrum shaft 26. It is possible to move.

図3,図4及び図7に示すように、ハウジング11の前面の上下位置には、開口28a有するガイド部材28がボルト44によって固定されている。可動遮蔽部材42は、その開口42aにおいて前記被ガイド部材23の外周に嵌り合って、前記収容部12の前端開口の隙間を遮蔽する。この可動遮蔽部材42の上下移動が前記ガイド部材28によってガイドされる。前記センタピン16の周囲を覆うように、ハウジング11の前面には固定遮蔽部材43が前記ガイド部材28とともにボルト44によって固定されている。この固定遮蔽部材43は、センタピン16の周囲における収容部12の前端開口の隙間を遮蔽する。従って、これらのガイド部材28,遮蔽部材42,43はハウジング11の内の収容部12内へのクーラントや切粉の侵入を防止するシャッタカバー部品である。   As shown in FIGS. 3, 4, and 7, a guide member 28 having an opening 28 a is fixed by bolts 44 at the upper and lower positions of the front surface of the housing 11. The movable shielding member 42 fits to the outer periphery of the guided member 23 at the opening 42a to shield the gap at the front end opening of the housing portion 12. The vertical movement of the movable shielding member 42 is guided by the guide member 28. A fixed shielding member 43 is fixed to the front surface of the housing 11 by a bolt 44 together with the guide member 28 so as to cover the periphery of the center pin 16. The fixed shielding member 43 shields the gap of the front end opening of the housing portion 12 around the center pin 16. Accordingly, the guide member 28 and the shielding members 42 and 43 are shutter cover parts that prevent coolant and chips from entering the housing portion 12 in the housing 11.

図3及び図4に示すように、前記シリンダ15は、ハウジング11に形成された1つのシリンダ室29と、そのシリンダ室29内に1軸線上において移動可能に収容された向きが反対方向の一対のピストン30とから構成されている。従って、このシリンダ15は、2頭のタンデム型を構成する。この場合、シリンダ室29及びピストン30の軸線が、前記作動部材14の移動方向と平行な面に沿うように、つまりワークWの軸線と直交する方向へ延びるように配置されている。そして、シリンダ室29内における両ピストン30間の内側または外側に圧油が供給されることにより、両ピストン30がハウジング11の外周側または中心側に移動される。   As shown in FIGS. 3 and 4, the cylinder 15 includes one cylinder chamber 29 formed in the housing 11 and a pair of cylinder chambers 29 in which the directions in which the cylinder 15 is movably accommodated on one axis are opposite to each other. The piston 30 is configured. Therefore, this cylinder 15 constitutes a two-head tandem type. In this case, the axes of the cylinder chamber 29 and the piston 30 are arranged so as to extend along a plane parallel to the moving direction of the operating member 14, that is, in a direction orthogonal to the axis of the workpiece W. Then, the pressure oil is supplied to the inner side or the outer side between the two pistons 30 in the cylinder chamber 29, whereby the two pistons 30 are moved to the outer peripheral side or the center side of the housing 11.

図3及び図4に示すように、前記両ピストン30のピストンロッド30aと両作動部材14のスライド部21における伝動部材25との間における収容部12内において、ハウジング11には伝動レバー31が支軸32を中心に回動可能に支持されている。各伝動レバー31の一端部がピストンロッド30aに係合されるとともに、他端部がローラ33を介して伝動部材25に連係されている。そして、両ピストン30がハウジング11の外周側または中心側に移動されると、両伝動レバー31が支軸32を中心に回動されて、両作動部材14がワークWの外周に対して接近する方向または離間する方向に移動され、両作動部材14の把持部材22間でワークWが把持または解放される。   As shown in FIGS. 3 and 4, a transmission lever 31 is supported on the housing 11 in the housing portion 12 between the piston rods 30 a of both the pistons 30 and the transmission members 25 of the slide portions 21 of the two operation members 14. The shaft 32 is supported so as to be rotatable. One end of each transmission lever 31 is engaged with the piston rod 30 a, and the other end is linked to the transmission member 25 via a roller 33. When both pistons 30 are moved to the outer peripheral side or the center side of the housing 11, both transmission levers 31 are rotated about the support shaft 32, and both operating members 14 approach the outer periphery of the workpiece W. The work W is gripped or released between the gripping members 22 of the two actuating members 14.

図4及び図5に示すように、前記作動部材14の把持部材22とスライド部21の支持部材27との間にはカム手段としてのカム機構34が介在されている。カム機構34は、支持部材27に形成された傾斜カム面35と、その傾斜カム面35に摺接するように把持部材22に形成された傾斜カム面36と、支持部材27上から遊挿孔37を介して把持部材22に螺合された一対(図1参照)のボルト38とから構成されている。前記傾斜カム面35及び傾斜カム面36は、面接触するとともに、作動部材14の移動方向に対して傾斜している。ボルト38の頭部と支持部材27との間には、把持部材22の傾斜カム面36が支持部材27の傾斜カム面35に圧接する方向に、把持部材22を移動付勢するための付勢手段としての弾性リング39が一対の金属座金39a間に挟持された状態で介装されている。   As shown in FIGS. 4 and 5, a cam mechanism 34 as a cam means is interposed between the holding member 22 of the operating member 14 and the support member 27 of the slide portion 21. The cam mechanism 34 includes an inclined cam surface 35 formed on the support member 27, an inclined cam surface 36 formed on the gripping member 22 so as to be in sliding contact with the inclined cam surface 35, and a loose insertion hole 37 from above the support member 27. And a pair of bolts 38 (see FIG. 1) that are screwed to the gripping member 22 via the screw. The inclined cam surface 35 and the inclined cam surface 36 are in surface contact and are inclined with respect to the moving direction of the operating member 14. A biasing force for moving and biasing the gripping member 22 between the head of the bolt 38 and the support member 27 in a direction in which the tilted cam surface 36 of the gripping member 22 is pressed against the tilted cam surface 35 of the support member 27. An elastic ring 39 as a means is interposed between the pair of metal washers 39a.

そして、前記作動部材14の把持部材22にワークWが把持された状態で、作動部材14がワークWの外周に向かってさらに接近移動されたとき、支持部材27の把持方向への移動により、把持部材22がカム機構34の傾斜カム面35と傾斜カム面36との摺接により、カム面35,36に沿って移動される。このため、把持部材22がスライド部21に対して相対的に把持解放方向に移動されるとともに、図5に矢印で示すように、作動部材14の移動方向と直交する方向へ相対的に引き込み移動される。この移動により、ワークWの端面のセンタ孔Waがセンタピン16に嵌合されて、ワークWのセンタリングが行われる。   Then, when the work member 14 is moved closer to the outer periphery of the work W in a state where the work member W is held by the grip member 22 of the operation member 14, the support member 27 moves in the holding direction. The member 22 is moved along the cam surfaces 35 and 36 by sliding contact between the inclined cam surface 35 and the inclined cam surface 36 of the cam mechanism 34. For this reason, the gripping member 22 is moved in the gripping release direction relative to the slide portion 21 and is relatively retracted and moved in a direction orthogonal to the moving direction of the operating member 14 as indicated by an arrow in FIG. Is done. By this movement, the center hole Wa on the end surface of the workpiece W is fitted to the center pin 16 and the workpiece W is centered.

図4及び図5に示すように、前記作動部材14のスライド部21における支持部材27の外側面には、把持部材22のセンタピン16側への引き込み移動端を規制するためのボルトの頭部よりなるストッパ40が突設されている。ストッパ40の外周において支持部材27と把持部材22との間には、緩衝部材としてのリング状のゴム材よりなり、ストッパ40より若干厚い緩衝部材41が介装されている。そして、ワークWのセンタ孔Waがセンタピン16に嵌合される際に、把持部材22の後退移動にともなって緩衝部材41が弾性圧縮され、このため、把持部材22が後退しながら緩衝されて、ワークWの嵌合動作にともなう衝撃が緩和される。   As shown in FIGS. 4 and 5, the outer surface of the support member 27 in the slide portion 21 of the actuating member 14 has a head of a bolt for regulating the pulling movement end of the gripping member 22 toward the center pin 16 side. The stopper 40 which becomes is projected. A buffer member 41 made of a ring-shaped rubber material as a buffer member and slightly thicker than the stopper 40 is interposed between the support member 27 and the gripping member 22 on the outer periphery of the stopper 40. Then, when the center hole Wa of the workpiece W is fitted to the center pin 16, the buffer member 41 is elastically compressed along with the backward movement of the grip member 22, so that the grip member 22 is buffered while being retracted, The impact associated with the fitting operation of the workpiece W is reduced.

次に、前記のように構成されたチャック装置について作用を説明する。
さて、このチャック装置において、ワークWを把持する場合には、図4に鎖線で示すように、ワークWの端部を両把持部材22間の把持位置に配置する。この状態で、シリンダ15におけるシリンダ室29内の両ピストン30間に圧油が供給されると、図6に示すように、両ピストン30がハウジング11の外周側に移動され、伝動レバー31を介して両作動部材14がワークWの外周に接近する方向へ移動される。この移動により、両作動部材14の把持部材22によってワークWの端部が把持される。
Next, the operation of the chuck device configured as described above will be described.
In this chuck apparatus, when the workpiece W is gripped, the end portion of the workpiece W is arranged at the gripping position between the gripping members 22 as indicated by a chain line in FIG. When pressure oil is supplied between the pistons 30 in the cylinder chamber 29 of the cylinder 15 in this state, the pistons 30 are moved to the outer peripheral side of the housing 11 as shown in FIG. Thus, both actuating members 14 are moved in a direction approaching the outer periphery of the workpiece W. By this movement, the end portion of the workpiece W is gripped by the gripping members 22 of the two operating members 14.

このワークWの把持状態で、作動部材14がさらにワークWの外周側に接近移動されると、カム機構34のカム作用により、作動部材14の把持部材22がスライド部21に対して作動部材14の移動方向と直交する内側方に相対移動され、その把持部材22に把持されたワークWがセンタピン16側に引き込まれる。つまり、作動部材14の把持方向への移動がワークWの引き込み方向への移動に変換される。この引き込みにより、ワークWの端面のセンタ孔Waがセンタピン16に嵌合されて、ワークWのセンタリングが行われる。このとき、ワークWのセンタ孔Waが偏心したり、ワークWの外周面に凹凸が形成されたりしていても、把持部材22はワークWを均等な力で把持する。すなわち、前記のようにワークWのセンタ孔Waが偏心したりしている場合は、対をなす把持部材22の移動ストロークが異なるように、タンデム型のシリンダ15の一対のピストン30の移動位置,つまりピストン対の移動範囲が図4の上下いずれかの方向に変位されて調整される。   When the operating member 14 is further moved closer to the outer peripheral side of the workpiece W in the gripping state of the workpiece W, the gripping member 22 of the operating member 14 is moved relative to the slide portion 21 by the cam action of the cam mechanism 34. The workpiece W is relatively moved inward in the direction perpendicular to the moving direction, and the workpiece W gripped by the gripping member 22 is drawn into the center pin 16 side. That is, the movement of the operating member 14 in the gripping direction is converted into the movement of the workpiece W in the pulling direction. By this drawing, the center hole Wa on the end surface of the workpiece W is fitted into the center pin 16, and the workpiece W is centered. At this time, even if the center hole Wa of the workpiece W is decentered or irregularities are formed on the outer peripheral surface of the workpiece W, the gripping member 22 grips the workpiece W with an equal force. That is, when the center hole Wa of the workpiece W is eccentric as described above, the movement positions of the pair of pistons 30 of the tandem cylinder 15 are different so that the movement strokes of the paired gripping members 22 are different. That is, the moving range of the piston pair is adjusted by being displaced in either the upper or lower direction in FIG.

以上のように、ワークWを把持した把持部材22が作動部材14の移動を利用して、作動部材14に対して相対的に後退しながら単独で引き込み移動されてセンタリングが行われる。ワークWの先端外周面及びワークWの端面のセンタ孔Waが高精度に加工されていない場合でも、把持状態のワークWに傾きが生じるおそれはない。また、ワークWのセンタ孔Waとセンタピン16との嵌合によってセンタリングが行われる際には、把持部材22の移動にともなって緩衝部材41が弾性圧縮されて、嵌合動作にともなう衝撃が緩和される。また、このとき、センタピン16は、緩衝のためにバネ18の付勢力に抗して後退される。このため、センタリング動作時に衝撃が発生するおそれはない。   As described above, the gripping member 22 that grips the workpiece W uses the movement of the actuating member 14 to be retracted and moved independently while being relatively retracted relative to the actuating member 14 to perform centering. Even when the outer peripheral surface of the tip of the workpiece W and the center hole Wa on the end surface of the workpiece W are not machined with high accuracy, there is no possibility that the workpiece W in the gripped state is inclined. Further, when centering is performed by fitting the center hole Wa of the workpiece W and the center pin 16, the buffer member 41 is elastically compressed as the gripping member 22 moves, so that the impact caused by the fitting operation is reduced. The At this time, the center pin 16 is retracted against the urging force of the spring 18 for buffering. For this reason, there is no possibility of an impact occurring during the centering operation.

従って、この実施形態によれば、以下のような効果を得ることができる。
(1) このチャック装置においては、作動部材14の把持部材22にワークWの外周が把持された状態で、作動部材14がさらに接近動作されるとき、カム機構34のカム作用により、作動部材14の把持部材22がスライド部21に対して作動部材14の動作方向と直交する方向へ相対的に単独で引き込み移動されて、ワークWの端面のセンタ孔Waとセンタピン16との嵌合によりセンタリングが行われる。よって、ワークWの先端外周面及びワークWの端面のセンタ孔Waが高精度に加工されていない場合でも、ワークWを傾きが生じることなく高精度にセンタリングして把持することができる。
Therefore, according to this embodiment, the following effects can be obtained.
(1) In this chuck device, when the operating member 14 is further moved closer to the gripping member 22 of the operating member 14 while the outer periphery of the workpiece W is gripped, the operating member 14 is operated by the cam action of the cam mechanism 34. The gripping member 22 is pulled and moved relative to the slide portion 21 in the direction orthogonal to the operation direction of the operating member 14, and centering is performed by fitting the center hole Wa and the center pin 16 on the end surface of the workpiece W. Done. Therefore, even when the center outer surface Wa of the outer peripheral surface of the workpiece W and the end surface of the workpiece W is not processed with high accuracy, the workpiece W can be centered and gripped with high accuracy without causing inclination.

(2) このチャック装置においては、前記シリンダ15の軸線が作動部材14の移動方向と平行な面に沿うように、つまりワークWの軸線と直交する方向へ延びるように配置されている。このため、シリンダ15の軸線をワークWの軸線と平行に延びるように配置した構成とは異なり、チャック装置の外形がワークWの軸線方向に長大になるのを回避することができて、チャック装置全体をコンパクトに構成することができる。   (2) In this chuck device, the cylinder 15 is arranged so that the axis of the cylinder 15 extends along a plane parallel to the moving direction of the actuating member 14, that is, extends in a direction perpendicular to the axis of the workpiece W. Therefore, unlike the configuration in which the axis of the cylinder 15 is arranged so as to extend in parallel with the axis of the workpiece W, the outer shape of the chuck device can be avoided from being elongated in the axial direction of the workpiece W. The whole can be configured compactly.

(3) このチャック装置においては、センタピン16をその軸線方向に沿って移動可能にするとともに、センタピン16を緩衝しながら後退させるバネ18が設けられている。従って、ワークWのセンタ孔Waがセンタピン16に嵌合されてセンタリングが行われる際には、バネ18が弾性圧縮されることにより、センタリング衝撃を緩和することができる。   (3) In this chuck device, a spring 18 is provided that allows the center pin 16 to move along the axial direction thereof, and retracts the center pin 16 while buffering. Therefore, when the center hole Wa of the workpiece W is fitted to the center pin 16 and the centering is performed, the spring 18 is elastically compressed, so that the centering impact can be reduced.

(4) このチャック装置においては、前記スライド部21と把持部材22との間に緩衝部材41が設けられている。このため、ワークWがセンタリングが行われる際には、把持部材22の移動にともなって緩衝部材41が弾性圧縮されることにより、嵌合動作にともなう衝撃を緩和することができる。   (4) In this chuck device, a buffer member 41 is provided between the slide portion 21 and the gripping member 22. For this reason, when the workpiece W is centered, the shock due to the fitting operation can be reduced by elastically compressing the buffer member 41 as the gripping member 22 moves.

(5) このチャック装置においては、把持部材22のシリンダ15としてタンデム型を用いたため、ワークWのセンタ孔Waが偏心したりしていても、把持部材22はワークWを均等な力で把持する。従って、ワークWを高精度に加工することが可能になる。   (5) In this chuck device, since the tandem type is used as the cylinder 15 of the gripping member 22, the gripping member 22 grips the work W with an equal force even if the center hole Wa of the work W is eccentric. . Therefore, the workpiece W can be machined with high accuracy.

(変更例)
なお、この実施形態は、次のように変更して具体化することも可能である。
・ 作動部材14のスライド部21と把持部材22との間のカム手段の構成を変更すること。例えば、スライド部21と把持部材22との一方に長孔状のカム面を設けるとともに、他方にはそのカム面に係合するピンを設けること。
(Example of change)
In addition, this embodiment can also be changed and embodied as follows.
Changing the configuration of the cam means between the slide portion 21 of the actuating member 14 and the gripping member 22; For example, a long-hole cam surface is provided on one of the slide portion 21 and the gripping member 22, and a pin that engages with the cam surface is provided on the other.

・ センタピン16や把持部材22の緩衝手段の構成を変更すること。例えば、緩衝手段として、オイルダンパを用いること。
・ センタピン16を移動可能にすることなく、センタピン16をハウジング11に固定すること。このようにすれば、ワークWの軸方向の特定の位置を基準位置として、ワークWに加工を施すことができる。
-Changing the configuration of the buffer means of the center pin 16 or the gripping member 22. For example, use an oil damper as a buffer.
The center pin 16 is fixed to the housing 11 without making the center pin 16 movable. In this way, the workpiece W can be processed with the specific position in the axial direction of the workpiece W as a reference position.

11…ハウジング、14…作動部材、15…駆動手段としてのシリンダ、16…センタピン、18…バネ、21…本体部、22…把持部材、23…被ガイド部材、25…伝動部材、27…支持部材、29…シリンダ室、30…ピストン、31…伝動レバー、34…カム手段としてのカム機構、35…傾斜カム面、36…傾斜カム面、38…ボルト、39…弾性リング、40…ストップボルト、41…緩衝部材、W…ワーク、Wa…センタ孔。   DESCRIPTION OF SYMBOLS 11 ... Housing, 14 ... Actuating member, 15 ... Cylinder as drive means, 16 ... Center pin, 18 ... Spring, 21 ... Body part, 22 ... Gripping member, 23 ... Guide member, 25 ... Transmission member, 27 ... Support member , 29 ... Cylinder chamber, 30 ... Piston, 31 ... Transmission lever, 34 ... Cam mechanism as cam means, 35 ... Inclined cam surface, 36 ... Inclined cam surface, 38 ... Bolt, 39 ... Elastic ring, 40 ... Stop bolt, 41 ... buffer member, W ... work, Wa ... center hole.

Claims (6)

ワークの外周に対して接近離間可能な作動部材と、その作動部材を接近離間動作させるための駆動手段と、ワークの端面のセンタ孔に嵌合されるセンタピンとを備えたチャック装置において、
前記作動部材は、本体部と、その本体部に移動可能に支持され、ワークの外周を把持する把持部材とを有し、
前記本体部と把持部材との間には、ワークが把持部材に把持された状態における作動部材の把持方向への移動を、把持部材のワーク引き込み方向への移動に変換させるカム手段を設けたことを特徴とするチャック装置。
In a chuck device comprising an operating member that can be moved closer to and away from the outer periphery of the workpiece, a driving means for moving the operating member toward and away from the outer periphery, and a center pin fitted in a center hole on an end surface of the workpiece.
The actuating member has a main body part and a gripping member that is supported by the main body part so as to be movable and grips the outer periphery of the workpiece,
Cam means for converting the movement of the operating member in the gripping direction in a state where the workpiece is gripped by the gripping member into the movement of the gripping member in the workpiece retracting direction is provided between the main body and the gripping member. A chuck device characterized by the above.
前記カム手段は、本体部と把持部材との間に設けられたカム面を備えていることを特徴とする請求項1に記載のチャック装置。 The chuck device according to claim 1, wherein the cam means includes a cam surface provided between the main body portion and the gripping member. 前記センタピンをその軸線方向に沿って移動可能にするとともに、センタピンを緩衝しながら後退させる緩衝手段を設けたことを特徴とする請求項1または2に記載のチャック装置。 The chuck device according to claim 1 or 2, further comprising a buffering means for allowing the center pin to move along its axial direction and for retracting the center pin while buffering the center pin. 前記駆動手段をシリンダによって構成し、そのシリンダの軸線を前記作動部材の移動方向と平行な面に沿うように配置したことを特徴とする請求項1〜3のうちのいずれか一項に記載のチャック装置。 The said drive means is comprised with the cylinder, and it has arrange | positioned so that the axis line of the cylinder may be along the surface parallel to the moving direction of the said operation member, The Claim 1 characterized by the above-mentioned. Chuck device. 前記本体部と把持部材との間には、緩衝部材を設けたことを特徴とする請求項1〜4のうちのいずれか一項に記載のチャック装置。 The chuck device according to claim 1, wherein a buffer member is provided between the main body portion and the gripping member. 前記シリンダとしてタンデム型シリンダを用いたことを特徴とする請求項4または5に記載のチャック装置。 6. The chuck device according to claim 4, wherein a tandem cylinder is used as the cylinder.
JP2010162919A 2010-07-20 2010-07-20 Chuck device Expired - Fee Related JP5592184B2 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103433303A (en) * 2013-08-06 2013-12-11 中国一拖集团有限公司 Built-in hydraulic clamping chuck used for spline cold rolling machine tool and assembly machine
KR101876004B1 (en) * 2015-12-01 2018-07-06 현대자동차주식회사 Center Apparatus Of Lathe

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JPS54178194U (en) * 1978-06-06 1979-12-15
JPS59183706U (en) * 1983-05-23 1984-12-07
JPS63229208A (en) * 1987-03-13 1988-09-26 Akashi Tekkosho:Kk Pull-in type clamping device in chuck of lathe or the like
JPH01199709A (en) * 1988-02-05 1989-08-11 Howa Mach Ltd Compensating chuck
JPH0336704U (en) * 1989-08-18 1991-04-10

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JPS54178194U (en) * 1978-06-06 1979-12-15
JPS59183706U (en) * 1983-05-23 1984-12-07
JPS63229208A (en) * 1987-03-13 1988-09-26 Akashi Tekkosho:Kk Pull-in type clamping device in chuck of lathe or the like
JPH01199709A (en) * 1988-02-05 1989-08-11 Howa Mach Ltd Compensating chuck
JPH0336704U (en) * 1989-08-18 1991-04-10

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103433303A (en) * 2013-08-06 2013-12-11 中国一拖集团有限公司 Built-in hydraulic clamping chuck used for spline cold rolling machine tool and assembly machine
CN103433303B (en) * 2013-08-06 2015-08-19 中国一拖集团有限公司 For built-in hydraulic expansion chuck and the assemble method of spline cold roll forming machine
KR101876004B1 (en) * 2015-12-01 2018-07-06 현대자동차주식회사 Center Apparatus Of Lathe

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