JPH0557510A - Automatic chuck device for cylinder grinding machine - Google Patents

Automatic chuck device for cylinder grinding machine

Info

Publication number
JPH0557510A
JPH0557510A JP24837191A JP24837191A JPH0557510A JP H0557510 A JPH0557510 A JP H0557510A JP 24837191 A JP24837191 A JP 24837191A JP 24837191 A JP24837191 A JP 24837191A JP H0557510 A JPH0557510 A JP H0557510A
Authority
JP
Japan
Prior art keywords
cam
support plate
work
hole
claws
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP24837191A
Other languages
Japanese (ja)
Other versions
JP2875658B2 (en
Inventor
Takeshi Kamiya
猛 神谷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KONDO KK
Original Assignee
KONDO KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by KONDO KK filed Critical KONDO KK
Priority to JP24837191A priority Critical patent/JP2875658B2/en
Publication of JPH0557510A publication Critical patent/JPH0557510A/en
Application granted granted Critical
Publication of JP2875658B2 publication Critical patent/JP2875658B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Gripping On Spindles (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)

Abstract

PURPOSE:To enable the holding of a work without replacing cam claws, even if the diameter of the work to be ground is slightly different, by widening the range capable of holding the work by a set of cam claws. CONSTITUTION:In the front of an inside cam-claw holding plate, three cam claws 23 are fitted at equal intervals on the same circumference, and in the rear of the inside cam-claw holding plate, respective pinions 28 are arranged and fitted so as to be coaxial with the respective cam-claws 23. On the outside of the respective pinions 28, an internal gear ring 6 that rotates integrally with a chuck body 1 is arranged, and the internal teeth 6a thereof are engaged with the respective pinions 28.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、円筒研削盤によりワ−
クを両センタ−で支えて研削するにあたり、偏心ワ−ク
においてもその芯と主軸の芯とがずれないようにして、
このワ−クを把持して研削するために主軸面板に装着さ
れる円筒研削盤用自動チャック装置に関するものであ
る。
BACKGROUND OF THE INVENTION The present invention uses a cylindrical grinding machine as a tool.
When grinding the work by supporting it with both centers, make sure that the center of the eccentric work does not deviate from the center of the spindle.
The present invention relates to an automatic chuck device for a cylindrical grinder which is mounted on a spindle face plate to grip and grind this work.

【0002】[0002]

【従来の技術】円筒研削盤において、主軸の正逆回転に
より3個のカム爪を回動させてワ−クを自動把持した
り、その自動解除を行い、しかも偏心ワ−クにおいては
その芯と主軸の芯とがずれないようにして把持する構成
の自動チャック装置は知られている。しかし、カム爪の
回動角度が小さいために、3個1組のカム爪により把持
できるワ−クの径の範囲が2〜4mmと非常に狭い。この
ため、ワ−クの径に対応した多数組のカム爪を製作して
用意しておく必要があると共に、ワ−クの径が変化する
毎に、これに対応した組のカム爪との交換を余儀なくさ
れる問題があった。
2. Description of the Related Art In a cylindrical grinding machine, three cam claws are rotated by the forward and reverse rotations of a main shaft to automatically grip a work or automatically release the work. There is known an automatic chucking device having a structure in which a core of a main shaft and a core of the main shaft are held so as not to be displaced. However, since the turning angle of the cam claws is small, the range of the diameter of the work that can be gripped by the set of three cam claws is very narrow, 2 to 4 mm. For this reason, it is necessary to manufacture and prepare a large number of sets of cam claws corresponding to the diameter of the work, and each time the diameter of the work changes, There was a problem that forced replacement.

【0003】[0003]

【発明が解決しようとする課題】本発明は、上記問題に
鑑み、一組のカム爪によるワークの把持可能な範囲を広
くして、研削するワークの径が多少変わった場合にも、
カム爪の交換なしでこれに把持できる自動チャック装置
の提供を課題としてなされたものである。
SUMMARY OF THE INVENTION In view of the above problems, the present invention widens the range in which a set of cam pawls can hold a work, and when the diameter of the work to be ground is slightly changed,
An object of the present invention is to provide an automatic chucking device that can hold a cam claw without replacing it.

【0004】[0004]

【課題を解決するための手段】上記課題を解決するため
に本発明の採用した手段は、円筒研削盤の主軸の先端の
主軸面板に装着して、主軸台の固定センタ−と心押台の
心押センタ−とで支承されたワ−クを把持するための円
筒研削盤用自動チャック装置であって、前記主軸面板の
前端面に筒状のチャックボディが装着され、前記固定セ
ンタ−に弾性摩擦軸受を介して嵌装した内筒体の前端部
にカム爪支持板が前記固定センタ−の軸心に対して垂直
に設けられて、前記チャックボディ内に収納され、前記
カム爪支持板の前面における円周方向の3等分位置に支
持軸を介してそれぞれ同形の板状のカム爪が取付けられ
ていると共に、各支持軸におけるカム爪支持板の裏面側
に突出した部分にそれぞれ同歯数のピニオンが取付けら
れ、内周面に内歯が形成された内歯リング体を前記チャ
ックボディにおける前記カム爪支持板の裏面に形成され
た空間部に、前記主軸面板と一体に回転可能であって、
しかも前記固定センタ−の半径方向に微動可能なように
配置して、この内歯リング体の内歯と3個の前記各ピニ
オンとを噛合させたことである。
In order to solve the above-mentioned problems, the means adopted by the present invention is mounted on a spindle face plate at the tip of the spindle of a cylindrical grinding machine to provide a fixed center for the spindle stock and a tailstock. An automatic chuck device for a cylindrical grinder for gripping a work supported by a tailstock center, wherein a cylindrical chuck body is mounted on the front end face of the spindle face plate, and an elastic member is mounted on the fixed center. A cam claw support plate is provided at the front end portion of the inner cylindrical body fitted via a friction bearing perpendicularly to the axis of the fixed center and is housed in the chuck body. Plate-shaped cam pawls of the same shape are mounted on the front surface at three equally divided positions in the circumferential direction via the support shafts, and the same teeth are provided on the portions of the respective support shafts that project to the rear surface side of the cam pawl support plate. Number of pinions are installed and inner teeth are The formed internal teeth ring body wherein the space portion formed on the rear surface of the cam pawl support plate in said chuck body, a rotatable integrally with the main shaft faceplate,
In addition, the fixed center is arranged so as to be finely movable in the radial direction, and the inner teeth of the inner toothed ring body are meshed with the three pinions.

【0005】[0005]

【発明の作用】主軸を正回転させると、その開始時にお
いて主軸面板と一体となった内歯リング体の回転によ
り、3個の各ピニオンが同期回動される。各ピニオンに
は支持軸を介してカム爪が一体に取付けられているの
で、3個の各ピニオンの同期回動により3個のカム爪が
同期回動してワ−クが自動把持される。3個のカム爪が
同期回動してワ−クが把持された後には、固定センタ−
に対する弾性摩擦軸受の摩擦力に抗してカム爪支持板を
取付けた内筒体がチャックボディと一体となって回転す
るため、内歯リング体の内歯と各ピニオンとは噛合状態
を維持したまま回転して、ワ−クに把持力を加え続け
る。一方、主軸を逆回転させると、内歯リング体が上記
と逆方向に回転して、各カム爪も上記と逆方向に回動し
て、ワ−クの把持が自動解除される。
When the main shaft is rotated in the normal direction, the three pinions are synchronously rotated by the rotation of the inner toothed ring body integrated with the main shaft face plate at the start of the normal rotation. Since the cam claws are integrally attached to each pinion via the support shaft, the three cam claws synchronously rotate by the synchronous rotation of the three pinions, and the work is automatically gripped. After the three cam claws rotate synchronously and the work is gripped, the fixed center
The inner cylindrical body with the cam claw support plate attached rotates integrally with the chuck body against the frictional force of the elastic friction bearing against the pin body, so that the inner teeth of the inner tooth ring body and the pinions are kept in mesh with each other. Continue rotating and continue to apply gripping force to the work. On the other hand, when the main shaft is rotated in the reverse direction, the inner toothed ring body is rotated in the opposite direction to the above, each cam claw is also rotated in the opposite direction, and the work is automatically released from the grip.

【0006】[0006]

【実施例】次に、この発明を図面に示す実施例に基づい
て説明する。図1ないし図5において、自動チャック装
置Bのチャックボディ1は筒状の部材であり、一方の面
に後述するライナー38の小径部38aに嵌合する円形
の嵌合穴1dが所定の深さ形成されている。チャックボ
ディ1は、嵌合穴1dと反対側の端面に、嵌合穴1dよ
り大径で、かつ深さの浅い第1穴1aが開けられてお
り、この第1穴1aの内部には嵌合穴1dと略同径で嵌
合穴1dより深さの深い第2穴1bが開けられている。
さらに、チャックボディ1は第2穴1bの内部に、第2
穴1bより小径で、かつ第2穴1bと略同じ深さの第3
穴1cが開けられている。そして、嵌合穴1dと第3穴
1cとの間に形成された固定部2の中心には、中心穴2
aが開けられている。上記の嵌合穴1d、第1穴1a、
第2穴1b、第3穴1c及び中心穴2aは同心になって
いる。固定部2には、複数本のボルト挿入穴3が円周方
向に等間隔をおいて開けられている。チャックボディ1
には、第3穴1cの形成された部分の外周面からその中
心方向に向けて、後述する円筒コロ43を嵌着する一対
のピン穴4が開けられている。
DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described based on the embodiments shown in the drawings. 1 to 5, the chuck body 1 of the automatic chuck device B is a cylindrical member, and a circular fitting hole 1d that fits into a small diameter portion 38a of a liner 38, which will be described later, has a predetermined depth on one surface. Has been formed. The chuck body 1 has a first hole 1a having a larger diameter and a smaller depth than the fitting hole 1d formed on the end surface on the side opposite to the fitting hole 1d. A second hole 1b having substantially the same diameter as the fitting hole 1d and having a deeper depth than the fitting hole 1d is formed.
In addition, the chuck body 1 has the second hole 1b inside the second hole 1b.
The third hole having a smaller diameter than the hole 1b and having substantially the same depth as the second hole 1b.
The hole 1c is opened. Then, at the center of the fixing portion 2 formed between the fitting hole 1d and the third hole 1c, the central hole 2
a is open. The fitting hole 1d, the first hole 1a,
The second hole 1b, the third hole 1c and the center hole 2a are concentric. The fixing portion 2 has a plurality of bolt insertion holes 3 formed at equal intervals in the circumferential direction. Chuck body 1
A pair of pin holes 4 into which a cylindrical roller 43, which will be described later, is fitted, is opened from the outer peripheral surface of the portion where the third hole 1c is formed, toward the center thereof.

【0007】図6及び図7は、チャックボディ1の第3
穴1cの深さより僅かに小さな厚さを有し、この第3穴
1c内に収納される内歯リング体6を示す。この内歯リ
ング体6は、その内周面に内歯6aが設けられており、
また、その外周面と内歯6aとの間には円弧状の規制穴
7が相対向して一対開けられている。また、内歯リング
体6の外周面における中心に対して対称位置には、所定
深さの溝8が一対設けられている。
FIG. 6 and FIG. 7 show a third part of the chuck body 1.
The inner toothed ring body 6 having a thickness slightly smaller than the depth of the hole 1c and housed in the third hole 1c is shown. The internal tooth ring body 6 is provided with internal teeth 6a on its inner peripheral surface,
Further, a pair of arcuate restriction holes 7 are provided between the outer peripheral surface and the inner teeth 6a so as to face each other. Further, a pair of grooves 8 having a predetermined depth are provided at symmetrical positions with respect to the center of the outer peripheral surface of the inner tooth ring body 6.

【0008】図8及び図9に示す円板状の内側カム爪支
持板9は、チャックボディ1の第2穴1bに挿入される
部材であり、その中心部には後述する内筒体29の先端
部を嵌着するための中心穴10が開けられており、この
中心穴10に近接し、かつ、互いに120度の中心角で
3個のビス穴11が開けられている。更に、この内側カ
ム爪支持板9には、同一円周上に等間隔をおいて3個の
カム軸穴12が開けられている。また、内側カム爪支持
板9における前記カム軸穴12より外周であって、しか
もその中心に対して対称位置に一対のピン13が裏面に
突設されている。この各ピン13は、内歯リング体6に
設けられた前記各規制穴7にそれぞれ挿入されるもので
ある。なお、前記内側カム爪支持板9には、各ビス穴1
1よりも外周よりにおいて後述する外側カム爪支持板1
6と結合するための3個の結合穴14が同一円周上に等
間隔をおいて開けられている。
The disk-shaped inner cam claw support plate 9 shown in FIGS. 8 and 9 is a member that is inserted into the second hole 1b of the chuck body 1, and has an inner cylindrical body 29, which will be described later, at the center thereof. A center hole 10 for fitting the tip end portion is formed, and three screw holes 11 are formed close to the center hole 10 and at a center angle of 120 degrees with each other. Further, the inner cam claw support plate 9 is provided with three cam shaft holes 12 at equal intervals on the same circumference. Further, a pair of pins 13 are provided on the back surface of the inner cam claw support plate 9 so as to be located on the outer periphery of the cam shaft hole 12 and symmetrically with respect to the center thereof. The pins 13 are respectively inserted into the restriction holes 7 provided in the inner toothed ring body 6. In addition, each screw hole 1 is provided in the inner cam claw support plate 9.
Outer cam claw support plate 1 which will be described later from the outer periphery than 1.
Three coupling holes 14 for coupling with 6 are formed at equal intervals on the same circumference.

【0009】図10及び図11に示す外側カム爪支持板
16は、外径が内側カム爪支持板9より小さいリング円
板状の部材であり、その中心穴17は内側カム爪支持板
9の中心穴10より大径になっている。この外側カム爪
支持板16には、前記内側カム爪支持板9のカム軸穴1
2と同一部分に、3個のカム軸穴18がそれぞれ開けら
れており、また、内側カム爪支持板9の結合穴14と結
合する為の結合穴19もそれぞれ3個同一位置に開けら
れている。この外側カム爪支持板16は、その外周面の
一部が結合穴19の近傍まで切り込まれて、縁部20が
形成されており、また、その中心穴17には各結合穴1
9方向に向けて切込21がそれぞれ3個形成されてい
る。
The outer cam claw support plate 16 shown in FIGS. 10 and 11 is a ring disk-shaped member having an outer diameter smaller than that of the inner cam claw support plate 9, and its center hole 17 is formed in the inner cam claw support plate 9. It has a larger diameter than the central hole 10. The outer cam claw support plate 16 has a cam shaft hole 1 of the inner cam claw support plate 9 therein.
Three cam shaft holes 18 are formed in the same portion as 2, and three coupling holes 19 for coupling with the coupling holes 14 of the inner cam pawl support plate 9 are also formed in the same position. There is. A part of the outer peripheral surface of the outer cam claw support plate 16 is cut into the vicinity of the coupling hole 19 to form an edge portion 20, and the central hole 17 has each coupling hole 1
Three cuts 21 are formed in each of the nine directions.

【0010】図12及び図13にカム爪23が示されて
いる。このカム爪23は、板状のカム部24と軸部25
とからなっている。カム部24のカム面26の輪郭は、
軸部25の軸心(O)から最短距離にある最底部26a
から時計回りに進むに従って順次その距離が長くなり、
最低部26aから略240度進んだ位置が最高部26b
になっている。そして、最高部26bと最低部26aと
はへ字状の切欠26cにより連結されている。軸部25
はカム部24のボス部27の一側に長く突出する内軸部
25aと、ボス部27の他側に僅かの長さ突出する外軸
部25bとからなっている。そして、内軸部25aは、
図1ないし図3に示すピニオン28の軸穴28aに嵌着
されるようになっている。
A cam pawl 23 is shown in FIGS. 12 and 13. The cam claw 23 includes a plate-shaped cam portion 24 and a shaft portion 25.
It consists of The contour of the cam surface 26 of the cam portion 24 is
The bottom portion 26a located at the shortest distance from the axis (O) of the shaft portion 25
The distance becomes longer as you go clockwise from
The highest position 26b is a position advanced by approximately 240 degrees from the lowest part 26a.
It has become. The highest portion 26b and the lowest portion 26a are connected by a V-shaped notch 26c. Shaft 25
The cam portion 24 is composed of an inner shaft portion 25a that projects long on one side of the boss portion 27 and an outer shaft portion 25b that projects slightly on the other side of the boss portion 27. Then, the inner shaft portion 25a is
The pinion 28 shown in FIGS. 1 to 3 is fitted into the shaft hole 28a.

【0011】図14及び図15に示す内筒体29は、一
側に円筒部30が形成されており、この円筒部30の内
周面には、固定センターCの外周部に嵌着される弾性摩
擦軸受41(図3参照)が嵌着される。この円筒部30
の一側にはリング部31が形成されており、このリング
部31の他側には固定部32が設けられている。この固
定部32の外周面は、3つの平面状の切欠面33が円周
方向に等間隔をおいて形成されている。また、固定部3
2の端面における前記各切欠面33で挟まれる部分に
は、それぞれねじ穴34が開けられている。また、固定
部32の先端には、内側カム爪支持板9の中心穴10に
嵌入可能な外径の筒部35が形成されている。
The inner cylindrical body 29 shown in FIGS. 14 and 15 has a cylindrical portion 30 formed on one side, and the inner peripheral surface of the cylindrical portion 30 is fitted to the outer peripheral portion of the fixed center C. The elastic friction bearing 41 (see FIG. 3) is fitted. This cylindrical part 30
A ring portion 31 is formed on one side of the above, and a fixing portion 32 is provided on the other side of this ring portion 31. On the outer peripheral surface of the fixed portion 32, three flat cutout surfaces 33 are formed at equal intervals in the circumferential direction. Also, the fixed portion 3
A screw hole 34 is formed in each of the end faces of the second end face sandwiched by the notch faces 33. A cylindrical portion 35 having an outer diameter that can be fitted into the center hole 10 of the inner cam claw support plate 9 is formed at the tip of the fixed portion 32.

【0012】次に、図3を参照にして、主軸面板Aに対
する自動チャック装置Bの組付けについて説明する。固
定センタ−Cの先端部に金属製の磨耗リング42を嵌め
込んでおくと共に、内筒体29の円筒部30の内周に弾
性摩擦軸受41を嵌装しておき、この弾性摩擦軸受41
を前記磨耗リング42の外側に嵌め込んで、弾性摩擦軸
受41を介して固定センタ−Cの先端部に内筒体29を
装着する。次に、主軸面板Aとチャックボディ1との間
に所定厚さのライナー38を介装し、チャックボディ1
の各ボルト挿入孔3にそれぞれ挿入されたボルト39を
介してチャックボディ1及びライナー38を主軸面板A
に取り付ける。その後に、チャックボディ1の第3穴1
c内に内歯リング体6を挿入した後、チャックボディ1
の両ピン穴4に円筒コロ43をそれぞれ打ち込み、その
先端部を内歯リング体6の外周の両溝8にそれぞれ嵌入
させる(図1及び図2参照)。次に、ピン13を外向き
にした内側カム爪支持板9と、縁部20を内向きにした
外側カム爪支持板16とを対向させ、内側カム爪支持板
9の3個のカム軸穴12に、3個のカム爪23の内軸部
25aをそれぞれ挿入すると共に、外側カム爪支持板1
6のカム軸穴18にカム爪23の外軸部25bを挿入す
る。この時、内側カム爪支持板9の結合穴14と外側カ
ム爪支持板16の結合穴19とに、間隔設定用のピン
(図示しない)を打ち込んで、内側及び外側の各カム爪
支持板9,16の間隔を、カム爪23が回動可能な間隔
に設定する。次に、内側カム爪支持板9から突出する各
カム爪23の内軸部25aをピニオン28の軸穴28a
にそれぞれ嵌入し、内軸部25aとピニオン28とをそ
の設定位置においてキー(図示しない)等により固定す
る。
Next, with reference to FIG. 3, the assembling of the automatic chuck device B to the spindle face plate A will be described. A wear ring 42 made of metal is fitted to the tip of the fixed center C, and an elastic friction bearing 41 is fitted to the inner circumference of the cylindrical portion 30 of the inner tubular body 29.
Is fitted on the outer side of the wear ring 42, and the inner cylindrical body 29 is attached to the tip of the fixed center C via the elastic friction bearing 41. Next, the liner 38 having a predetermined thickness is interposed between the spindle face plate A and the chuck body 1, and the chuck body 1
Of the chuck body 1 and the liner 38 via the bolts 39 inserted into the respective bolt insertion holes 3 of the spindle face plate A.
Attach to. After that, the third hole 1 of the chuck body 1
After inserting the inner tooth ring body 6 into c, the chuck body 1
Cylindrical rollers 43 are driven into both pin holes 4 and the tip portions thereof are fitted into both grooves 8 on the outer circumference of the internal tooth ring body 6 (see FIGS. 1 and 2). Next, the inner cam claw support plate 9 with the pin 13 facing outward and the outer cam claw support plate 16 with the edge portion 20 facing inward are opposed to each other, and three cam shaft holes of the inner cam claw support plate 9 are provided. 12, the inner shaft portions 25a of the three cam claws 23 are respectively inserted, and the outer cam claw support plate 1
The outer shaft portion 25b of the cam claw 23 is inserted into the cam shaft hole 18 of No. 6 in FIG. At this time, a pin (not shown) for setting a gap is driven into the coupling hole 14 of the inner cam claw support plate 9 and the coupling hole 19 of the outer cam claw support plate 16 so that the inner and outer cam claw support plates 9 respectively. , 16 is set to an interval at which the cam claw 23 can rotate. Next, the inner shaft portion 25a of each cam claw 23 protruding from the inner cam claw support plate 9 is attached to the shaft hole 28a of the pinion 28.
, And the inner shaft portion 25a and the pinion 28 are fixed at their set positions by a key (not shown) or the like.

【0013】上記のように、内側カム爪支持板9と外側
カム爪支持板16とに、3個のカム爪23及びピニオン
28を取付けてユニット状態とした後に、内側カム爪支
持板9をチャックボディ1の第2穴1b内に挿入すると
同時に、内側カム爪支持板9の両ピン13を内歯リング
体6の両規制穴7にそれぞれ挿入して、図1に示すよう
に、両ピン13を各規制穴7の一方の端部近傍に位置さ
せると共に、3個のカム爪23の各カム面26が互いに
設定された最小径のワークを把持可能な状態にして、各
ピニオン28と内歯リング体6の内歯6aとを噛み合わ
す。ここで、ピニオン28の外周面が内筒体29に当接
しないようにするため、各ピニオン28は内筒体29の
切欠面33と対向する位置で、内歯リング体6の方向へ
押し込む必要がある。次に、外側カム爪支持板16の3
個の切込21側から挿入された皿ねじ(図示しない)を
内側カム爪支持板9の各ビス穴11を経て内筒体29の
各ねじ穴34にねじ込むと、内側カム爪支持板9と内筒
体29とは一体的に固定される。なお、図3で第1穴1
aの端面に固定された押板44は、その中心穴部に形成
された縁部44aが、外側カム爪支持板16の縁部20
の外側に位置して、カム爪23等が第2穴1bから飛び
出すのを防止している。
As described above, the inner cam claw support plate 9 is chucked after the three cam claws 23 and the pinion 28 are attached to the inner cam claw support plate 9 and the outer cam claw support plate 16 to form a unit state. At the same time as inserting into the second hole 1b of the body 1, both pins 13 of the inner cam claw support plate 9 are inserted into both restricting holes 7 of the inner tooth ring body 6, respectively, and as shown in FIG. Is located near one end of each regulation hole 7, and each cam surface 26 of the three cam pawls 23 is made to be capable of gripping a work piece having a minimum diameter set to each other, and each pinion 28 and the internal teeth. The inner teeth 6a of the ring body 6 are meshed with each other. Here, in order to prevent the outer peripheral surface of the pinion 28 from contacting the inner cylindrical body 29, it is necessary to push each pinion 28 toward the inner toothed ring body 6 at a position facing the cutout surface 33 of the inner cylindrical body 29. There is. Next, 3 of the outer cam claw support plate 16
When a flat head screw (not shown) inserted from the individual notch 21 side is screwed into each screw hole 34 of the inner cylinder 29 through each screw hole 11 of the inner cam claw support plate 9, the inner cam claw support plate 9 and The inner cylinder 29 is integrally fixed. In addition, in FIG. 3, the first hole 1
In the push plate 44 fixed to the end surface of the a, the edge portion 44a formed in the central hole portion thereof has the edge portion 20 of the outer cam claw support plate 16
The cam claws 23 and the like are located outside the first hole to prevent the cam claws 23 and the like from jumping out from the second hole 1b.

【0014】次に、この自動チャック装置Bにより、こ
のチャックで把持可能な最小径のワークW1 を研削する
には、主軸台側の固定センターCと心押台の心押センタ
ー(図示しない)とにより、ワークW1 の両端を支承す
る。この状態において、ワ−クW1 の一端は、チャック
ボディ1の第2穴1bの部分まで入り込んでいる。図1
において、主軸を正転させて主軸面板Aを反時計方向P
に回転させると、自動チャック装置Bのチャックボディ
1は主軸面板Aと一体となって同方向へ回転する。この
ため、2本の円筒コロ43を介してチャックボディ1に
連結された内歯リング体6も同方向へ回転する。一方、
弾性摩擦軸受41及び内筒体29を介して固定センター
Cに嵌装された内側カム爪支持板9は、弾性摩擦軸受4
1の固定センターCに対する摩擦力の作用により回転で
きず、停止している。このため、内歯リング体6が回転
すると、この内歯6aと噛み合う各ピニオン28は反時
計方向Pに回転させられて、各カム爪23は、そのカム
面26の最高部26bがワークW1 に接近する方向へ回
転し、カム面26によりワークW1 を把持する。このよ
うに、3個のカム爪23により、ワークW1 を把持する
とカム爪23は回転出来なくなるので、ピニオン28も
回転しない。このため、固定センタ−Cに対する弾性摩
擦軸受41の摩擦力に抗して、各ピニオン28は内歯リ
ング体6と一体となって回転し、ワークW1 も内歯リン
グ体6の回転方向に駆動回転させられ、この状態で研削
が行われる。この時、内歯リング体6の規制穴7に挿入
されている内側カム爪支持板9のピン13は、規制穴7
の一端の近傍に位置している。
Next, in order to grind the work W 1 having the smallest diameter which can be held by the chuck by the automatic chuck device B, the fixed center C on the headstock side and the tailstock center of the tailstock (not shown). Both ends of the work W 1 are supported by. In this state, one end of the work W 1 extends into the second hole 1 b of the chuck body 1. Figure 1
, The spindle is rotated in the normal direction to move the spindle face plate A in the counterclockwise direction P.
When the automatic chucking device B is rotated, the chuck body 1 of the automatic chucking device B rotates together with the spindle face plate A in the same direction. Therefore, the inner toothed ring body 6 connected to the chuck body 1 via the two cylindrical rollers 43 also rotates in the same direction. on the other hand,
The inner cam claw support plate 9 fitted to the fixed center C via the elastic friction bearing 41 and the inner cylindrical body 29 has the elastic friction bearing 4
Due to the effect of frictional force on the fixed center C of No. 1, it cannot rotate and is stopped. Therefore, when the inner tooth ring body 6 rotates, each pinion 28 meshing with the inner tooth 6a is rotated in the counterclockwise direction P, and each cam pawl 23 has the highest portion 26b of the cam surface 26 of the work W 1 The workpiece W 1 is gripped by the cam surface 26 by rotating in the direction of approaching. In this way, when the work W 1 is gripped by the three cam claws 23, the cam claws 23 cannot rotate, so that the pinion 28 also does not rotate. Therefore, each pinion 28 rotates integrally with the inner tooth ring body 6 against the frictional force of the elastic friction bearing 41 against the fixed center C, and the work W 1 also rotates in the rotating direction of the inner tooth ring body 6. It is driven and rotated, and grinding is performed in this state. At this time, the pin 13 of the inner cam claw support plate 9 inserted into the regulation hole 7 of the inner tooth ring body 6 is
It is located near one end of.

【0015】ワークW1 の研削が終了すると、主軸を停
止させた後にこれを逆転させて主軸面板Aを研削時とは
逆の時計方向P’に回転させて、各カム爪23によるワ
−クW1 の把持を解除させる。主軸の逆転開始時におい
て、固定センタ−Cに対する弾性摩擦軸受41の摩擦力
によって、内側カム爪支持板9は停止している。このた
め、主軸面板Aの回転に伴い、内歯リング体6が時計方
向に回転すると、3個のピニオン28が同方向へ回転さ
せられるので、カム爪23が同方向へ回転し、そのカム
面26が同時にワークW1 の外周面から離れて、各カム
爪23によるワ−クW1 の把持が解除される。なお、上
記のように、主軸面板Aを時計方向P’に回転させて、
3個のカム爪23によるワ−クW1 の把持を解く際に、
カム爪23が一定角度だけ回動すると、内歯リング体6
の規制穴7に挿入されている内側カム爪支持板9のピン
13が、この溝8の形成端に当接するため、その後は内
歯リング体6とピニオン28とは、一体となって回転す
る(その状態が図2で二点鎖線で示されている)。この
ため、カム爪23は設定角度を超えて回動するのが規制
される。本実施例においては、内歯リング体6に形成さ
れた円弧状の規制穴7と、内側カム爪支持板9に突設さ
れてこの規制穴7に挿入されるピン13とが、主軸の逆
転時においてカム爪の回動を規制するための回動規制部
材を構成している。また、本実施例では、カム爪23の
軸部25が、内側カム爪支持板9と外側カム爪支持板1
6とで両端支持されているので、3個のカム爪23によ
りワ−クW1 を把持する際に、このカム爪23がこじら
れる(カム爪23の軸部25の芯が固定センタ−Cの芯
に対して僅かに傾斜することをいう)ことがなくなっ
て、カム爪によるワ−クの把持、及びその解除が確実に
行われる。このように、カム爪のカム軸を両端支持でき
るのは、一組のカム爪によるワ−クの把持範囲が広いた
めに、カム爪の交換を必要としないからである。
When the grinding of the work W 1 is completed, the spindle is stopped and then it is reversed to rotate the spindle face plate A in the clockwise direction P ′ opposite to that at the time of grinding, and the work by each cam claw 23 is performed. Release the grip on W 1 . At the start of the reverse rotation of the main shaft, the inner cam pawl support plate 9 is stopped by the frictional force of the elastic friction bearing 41 against the fixed center C. Therefore, when the inner toothed ring body 6 rotates clockwise along with the rotation of the spindle face plate A, the three pinions 28 rotate in the same direction, so that the cam pawls 23 rotate in the same direction and the cam surface 26 is separated from the outer peripheral surface of the workpiece W 1 at the same time, word by each cam pawl 23 - is gripped phrase W 1 is released. As described above, by rotating the spindle face plate A in the clockwise direction P ′,
When unfastening the work W 1 by the three cam claws 23,
When the cam claw 23 rotates by a certain angle, the inner tooth ring body 6
Since the pin 13 of the inner cam claw support plate 9 inserted into the restriction hole 7 comes into contact with the formation end of the groove 8, the inner toothed ring body 6 and the pinion 28 rotate integrally thereafter. (The state is shown by the chain double-dashed line in FIG. 2). Therefore, the cam claw 23 is restricted from rotating beyond the set angle. In this embodiment, the arcuate restricting hole 7 formed in the inner tooth ring body 6 and the pin 13 protruding from the inner cam claw support plate 9 and inserted into the restricting hole 7 make the spindle reverse. A rotation restricting member for restricting the rotation of the cam pawl at times is configured. Further, in the present embodiment, the shaft portion 25 of the cam claw 23 has the inner cam claw support plate 9 and the outer cam claw support plate 1
Since both ends are supported by 6 and 6, when the work W 1 is gripped by the three cam claws 23, the cam claws 23 are twisted (the center of the shaft portion 25 of the cam claw 23 is the fixed center C). (Which means that the work is slightly inclined with respect to the core), the work can be reliably held and released by the cam claw. Thus, the cam shafts of the cam pawls can be supported at both ends because it is not necessary to replace the cam pawls because the work holding range of the set of cam pawls is wide.

【0016】図2はこの自動チャック装置Bでチャック
可能な最大径のワークW2 を把持する状態を示す。この
ように、ワークの径が大きい場合には、始めに2点鎖線
で示すように、カム爪23の切欠26cをワークW2
対向させ、両センターにより支持されるワークW2 とカ
ム爪23との間に隙間を形成した後、主軸面板Aを反時
計方向Pに回転させることにより、ワークW2 を把持す
る。なお、この実施例におけるワークW1,W2 の外径
は、それぞれ6mm,30mmであり、外径差が24mmに及
ぶ範囲において、同一のカム爪によるワ−クの把持が可
能であった。
FIG. 2 shows a state in which the workpiece W 2 having the maximum diameter that can be chucked by the automatic chucking device B is gripped. Thus, if the diameter of the workpiece is large, as shown by two-dot chain line in the beginning, are opposed to the notch 26c of the cam claw 23 to the workpiece W 2, the workpiece W 2 and the cam pawl 23 which is supported by both centers After forming a gap between the workpiece W 2 and the spindle face plate A, the work W 2 is gripped by rotating the spindle face plate A in the counterclockwise direction P. The outer diameters of the works W 1 and W 2 in this embodiment were 6 mm and 30 mm, respectively, and the work could be gripped by the same cam claw within a range where the difference in outer diameter was 24 mm.

【0017】この実施例において、内筒体29を固定セ
ンターCに嵌装するのに、その円筒部30と固定センタ
ーCとの間に弾性摩擦軸受41を介装し、また、内歯リ
ング体6の2個の溝8に、チャックボディ1に固定した
2個の円筒コロ43をそれぞれ嵌入して、内歯リング体
6をチャックボディ1と一体的に回転可能にすると共
に、内歯リング体6をその半径方向に微動可能にしてあ
る。このため、ワークにおけるカム爪23による把持部
分が多少偏心している場合には、弾性摩擦軸受41が弾
性変形して、内歯リング体6と内筒体29とが固定セン
タ−Cの半径方向に微動するために、偏心ワ−クの芯と
主軸の芯とがずれることはなく、ワ−クが心ずれした状
態で研削されるのが防止される。
In this embodiment, when the inner cylinder 29 is fitted to the fixed center C, the elastic friction bearing 41 is interposed between the cylindrical portion 30 and the fixed center C, and the inner tooth ring body is also provided. Two cylindrical rollers 43 fixed to the chuck body 1 are fitted into the two grooves 8 of the inner tooth ring body 6 so that the inner tooth ring body 6 can rotate integrally with the chuck body 1 and the inner tooth ring body 6 is rotated. 6 can be finely moved in the radial direction. Therefore, when the portion of the work gripped by the cam claw 23 is slightly eccentric, the elastic friction bearing 41 elastically deforms, and the inner tooth ring body 6 and the inner cylindrical body 29 move in the radial direction of the fixed center C. Because of the slight movement, the core of the eccentric work and the center of the main shaft do not shift, and the work is prevented from being ground in the state of being offset.

【0018】[0018]

【発明の効果】本発明は、以上説明したように構成され
ているので、以下に記載されるような効果を奏する。
(1)内歯リング体の内歯と3個のピニオンとを噛み合
わせて、各ピニオンと同軸にカム爪を取付けて、内歯リ
ング体の回転によりピニオンを回動させて、3個のカム
爪によりワ−クを把持する構成であるために、一組のカ
ム爪によるワ−クの把持可能な範囲が広くなる。このた
め、ワ−クの径が多少変わっても、カム爪の交換をしな
くても、ワ−クを把持して研削できる。(2)3個のカ
ム爪をピニオンと内歯リング体とから成る歯車機構によ
り回動させる構成にしたので、カム爪の回動が正確にな
り、ワークを確実に把持することができると共に、長期
間の使用によってもカム爪の運動のずれが生じない。
(3)一組のカム爪によるワ−クの把持範囲が広くなっ
て、カム爪の交換が不要となるので、カム爪の軸部を両
端支持できる。この結果、カム爪によるワ−クの把持の
際に、このカム爪がこじられなくなって、ワ−クの把
持、及びその解除を確実に行える。(4)主軸の正逆転
開始時において、ワ−クの把持、及びその解除が自動的
に行われるので、チャック装置を駆動させるための空気
源、油圧源などの外部動力を一切必要としない。
Since the present invention is constructed as described above, it has the following effects.
(1) The inner teeth of the inner toothed ring body are meshed with the three pinions, the cam claws are attached coaxially to the respective pinions, and the pinion is rotated by the rotation of the inner toothed ring body to rotate the three cams. Since the work is grasped by the claws, the range in which the work can be grasped by the pair of cam claws is widened. Therefore, even if the diameter of the work is slightly changed, the work can be gripped and ground without replacing the cam claws. (2) Since the three cam claws are rotated by the gear mechanism including the pinion and the inner tooth ring body, the cam claws rotate accurately, and the work can be reliably gripped. Even if it is used for a long period of time, the movement of the cam claw does not shift.
(3) Since the work gripping range by the pair of cam claws is widened and the cam claws do not need to be replaced, the shaft portion of the cam claw can be supported at both ends. As a result, when the work is gripped by the cam claw, the cam claw is not twisted, and the work can be reliably gripped and released. (4) Since the work is automatically grasped and released at the start of the forward and reverse rotations of the main shaft, no external power such as an air source or a hydraulic source for driving the chuck device is required.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の自動チャック装置で最小径のワ−クW
1 を把持している状態の概略正面図である。
FIG. 1 is a work W having a minimum diameter in an automatic chuck device of the present invention.
FIG. 3 is a schematic front view of a state where 1 is gripped.

【図2】同じく最大径のワ−クW2 を把持している状態
の概略正面図である。
[2] Also the maximum diameter Wa - is a schematic front view of a condition gripping on the click W 2.

【図3】図1のXーX線断面図である。FIG. 3 is a sectional view taken along line XX of FIG.

【図4】チャックボディ1の正面図である。FIG. 4 is a front view of the chuck body 1.

【図5】図4のY−Y線断面図である。5 is a cross-sectional view taken along the line YY of FIG.

【図6】内歯リング体6の正面図である。FIG. 6 is a front view of an internal tooth ring body 6.

【図7】同じく側面図である。FIG. 7 is a side view of the same.

【図8】内側カム爪支持板9の正面図である。FIG. 8 is a front view of an inner cam pawl support plate 9.

【図9】同じく縦断面図である。FIG. 9 is a vertical sectional view of the same.

【図10】外側カム爪支持板16の正面図である。FIG. 10 is a front view of an outer cam pawl support plate 16.

【図11】同じく縦断面図である。FIG. 11 is a vertical sectional view of the same.

【図12】カム爪23の正面図である。FIG. 12 is a front view of a cam pawl 23.

【図13】同じく側面図である。FIG. 13 is a side view of the same.

【図14】内筒体29の正面図である。FIG. 14 is a front view of an inner cylinder body 29.

【図15】同じく縦断面図である。FIG. 15 is a vertical sectional view of the same.

【符号の説明】[Explanation of symbols]

A:主軸面板 B:自動チャック装置 C:固定センター 1:チャックボディ 6:内歯リング体 7:内歯リング体に形成された規制穴(回動規制部材) 9:内側カム爪支持板(カム爪支持板) 13:内側カム爪支持板に突設されたピン(回動規制部
材) 16:外側カム爪支持板 23:カム爪 28:ピニオン 29:内筒体 41:弾性摩擦軸受
A: Spindle face plate B: Automatic chuck device C: Fixed center 1: Chuck body 6: Inner tooth ring body 7: Restriction hole (rotation restricting member) formed in the inner tooth ring body 9: Inner cam claw support plate (cam Claw support plate) 13: Pin (rotation restricting member) protruding from the inner cam claw support plate 16: Outer cam claw support plate 23: Cam claw 28: Pinion 29: Inner cylinder 41: Elastic friction bearing

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 円筒研削盤の主軸の先端の主軸面板に装
着して、主軸台の固定センタ−と心押台の心押センタ−
とで支承されたワ−クを把持するための円筒研削盤用自
動チャック装置であって、前記主軸面板の前端面に筒状
のチャックボディが装着され、前記固定センタ−に弾性
摩擦軸受を介して嵌装した内筒体の前端部にカム爪支持
板が前記固定センタ−の軸心に対して垂直に設けられ
て、前記チャックボディ内に収納され、前記カム爪支持
板の前面における円周方向の3等分位置に支持軸を介し
てそれぞれ同形の板状のカム爪が取付けられていると共
に、各支持軸におけるカム爪支持板の裏面側に突出した
部分にそれぞれ同歯数のピニオンが取付けられ、内周面
に内歯が形成された内歯リング体を前記チャックボディ
における前記カム爪支持板の裏面に形成された空間部
に、前記主軸面板と一体に回転可能であって、しかも前
記固定センタ−の半径方向に微動可能なように配置し
て、この内歯リング体の内歯と3個の前記各ピニオンと
を噛合させ、主軸の正逆回転開始時において前記内歯リ
ング体の回転により、3個の前記各ピニオンを同期回動
させて、これと一体に回動する3個の前記カム爪による
ワ−クの把持、及びその解除を自動的に行うように構成
したことを特徴とする円筒研削盤用自動チャック装置。
1. A fixed center of a headstock and a tailstock center of a tailstock mounted on a spindle face plate at the tip of a spindle of a cylindrical grinder.
An automatic chuck device for a cylindrical grinder for gripping a work supported by a cylindrical chuck body mounted on the front end face of the spindle face plate, and an elastic friction bearing on the fixed center. A cam claw support plate is provided at the front end portion of the inner cylinder body fitted in the vertical direction with respect to the axial center of the fixed center, is housed in the chuck body, and has a circumference at the front surface of the cam claw support plate. The plate-shaped cam claws of the same shape are attached to the three equal positions in the direction via the support shafts, and the pinions having the same number of teeth are respectively provided on the portions of the support shafts projecting to the rear surface side of the cam claw support plate. An inner toothed ring body attached and having inner teeth formed on an inner peripheral surface thereof is rotatable integrally with the spindle face plate in a space formed on the back surface of the cam claw support plate in the chuck body, and Radius of the fixed center It is arranged so that it can be finely moved in the direction, and the internal teeth of this internal tooth ring body are meshed with each of the three pinions, and by the rotation of the internal tooth ring body at the start of forward and reverse rotation of the main shaft, three The cylindrical grinding is characterized in that each of the pinions is synchronously rotated, and the work is grasped and released automatically by the three cam claws that rotate integrally with the pinions. Automatic chuck device for board.
【請求項2】 主軸の逆転時において、カム爪の回動を
規制するための回動規制部材を備えていることを特徴と
する請求項1に記載の円筒研削盤用自動チャック装置。
2. The automatic chuck device for a cylindrical grinder according to claim 1, further comprising a rotation restricting member for restricting rotation of the cam claw when the main shaft rotates in the reverse direction.
JP24837191A 1991-09-02 1991-09-02 Automatic chuck device for cylindrical grinding machines Expired - Lifetime JP2875658B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24837191A JP2875658B2 (en) 1991-09-02 1991-09-02 Automatic chuck device for cylindrical grinding machines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24837191A JP2875658B2 (en) 1991-09-02 1991-09-02 Automatic chuck device for cylindrical grinding machines

Publications (2)

Publication Number Publication Date
JPH0557510A true JPH0557510A (en) 1993-03-09
JP2875658B2 JP2875658B2 (en) 1999-03-31

Family

ID=17177106

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24837191A Expired - Lifetime JP2875658B2 (en) 1991-09-02 1991-09-02 Automatic chuck device for cylindrical grinding machines

Country Status (1)

Country Link
JP (1) JP2875658B2 (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002144104A (en) * 2000-09-21 2002-05-21 Forkardt Schweiz Ag Method for working workpiece and chuck having center pin for executing it
KR100448252B1 (en) * 2002-08-19 2004-09-13 구은모 Clamping device for joining pipe and hose
CN100368127C (en) * 2006-02-17 2008-02-13 南京和澳机电实业有限公司 Automatic three-paw quick clamping device
CN102773739A (en) * 2012-08-17 2012-11-14 南京和澳自动化科技有限公司 Quick combination clamping device
US8448536B2 (en) 2007-12-21 2013-05-28 Zf Friedrichshafen Ag Actuating device having a locking roller
CN104369094A (en) * 2014-10-27 2015-02-25 太仓市锦立得粉末冶金有限公司 Gear fixing mold for machining end face of gear connecting plate
CN105234445A (en) * 2015-11-29 2016-01-13 山东建筑大学 Pneumatic expanding chuck
JP2018111176A (en) * 2017-01-13 2018-07-19 牧野フライス精機株式会社 Automatic chuck
CN108838767A (en) * 2018-06-04 2018-11-20 芜湖恒安钢结构有限公司 A kind of hull plane grinding device
CN108994774A (en) * 2017-06-06 2018-12-14 泰科电子(上海)有限公司 Elastic seal ring struts equipment
KR102279209B1 (en) * 2021-03-15 2021-07-19 (주)에이치씨엠 A bearing-type grinder cramp
CN113400108A (en) * 2021-07-09 2021-09-17 陕西诺贝特自动化科技有限公司 Cylindrical grinder anchor clamps

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109746518B (en) * 2019-03-25 2020-05-15 安徽瑞林精科股份有限公司 Special reaming equipment for remanufacturing of automobile automatic gearbox valve body

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002144104A (en) * 2000-09-21 2002-05-21 Forkardt Schweiz Ag Method for working workpiece and chuck having center pin for executing it
KR100448252B1 (en) * 2002-08-19 2004-09-13 구은모 Clamping device for joining pipe and hose
CN100368127C (en) * 2006-02-17 2008-02-13 南京和澳机电实业有限公司 Automatic three-paw quick clamping device
US8448536B2 (en) 2007-12-21 2013-05-28 Zf Friedrichshafen Ag Actuating device having a locking roller
CN102773739A (en) * 2012-08-17 2012-11-14 南京和澳自动化科技有限公司 Quick combination clamping device
CN104369094A (en) * 2014-10-27 2015-02-25 太仓市锦立得粉末冶金有限公司 Gear fixing mold for machining end face of gear connecting plate
CN105234445A (en) * 2015-11-29 2016-01-13 山东建筑大学 Pneumatic expanding chuck
JP2018111176A (en) * 2017-01-13 2018-07-19 牧野フライス精機株式会社 Automatic chuck
CN108994774A (en) * 2017-06-06 2018-12-14 泰科电子(上海)有限公司 Elastic seal ring struts equipment
CN108838767A (en) * 2018-06-04 2018-11-20 芜湖恒安钢结构有限公司 A kind of hull plane grinding device
CN108838767B (en) * 2018-06-04 2020-08-18 芜湖恒安钢结构有限公司 Plane grinding device for hull
KR102279209B1 (en) * 2021-03-15 2021-07-19 (주)에이치씨엠 A bearing-type grinder cramp
CN113400108A (en) * 2021-07-09 2021-09-17 陕西诺贝特自动化科技有限公司 Cylindrical grinder anchor clamps

Also Published As

Publication number Publication date
JP2875658B2 (en) 1999-03-31

Similar Documents

Publication Publication Date Title
JP2875658B2 (en) Automatic chuck device for cylindrical grinding machines
US4393626A (en) Toolholder for supporting thin rotary tools
EP1671728B1 (en) Turret tool rest
US1561843A (en) Chuck
US2639157A (en) Adjustable chuck
US2555496A (en) Spline arbor chuck
US3108412A (en) Chuck for gears and the like
US3741572A (en) Quill spindle
US2985456A (en) Multiple-screw actuated collet chuck
US3204496A (en) Infinite position wrench
US2392809A (en) Self-releasing toolholder
JP2005249110A (en) Rotation output device
JPH0551515U (en) Cam claw support device in automatic chuck device for cylindrical grinder
US3701539A (en) Work holder for splined workpieces
US2546655A (en) Adjustable hand-drill
JP2003127012A (en) Chucking device
US2356651A (en) Machine tool
US3782742A (en) Three jaw chuck application
US4996758A (en) Method and apparatus for spur and helical gear manufacture
US1833601A (en) Center drive lathe
US2745670A (en) Quick acting chucking tool
US2879682A (en) Splined article holder using ball cams
US2698755A (en) Gear chuck
JP6656189B2 (en) Automatic chuck
JPS6016333A (en) Machining method of eccentric shafts and machining jig

Legal Events

Date Code Title Description
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: 20110114

Year of fee payment: 12

FPAY Renewal fee payment (prs date is renewal date of database)

Year of fee payment: 12

Free format text: PAYMENT UNTIL: 20110114

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120114

Year of fee payment: 13

EXPY Cancellation because of completion of term
FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120114

Year of fee payment: 13