JPH0314246Y2 - - Google Patents
Info
- Publication number
- JPH0314246Y2 JPH0314246Y2 JP1987201346U JP20134687U JPH0314246Y2 JP H0314246 Y2 JPH0314246 Y2 JP H0314246Y2 JP 1987201346 U JP1987201346 U JP 1987201346U JP 20134687 U JP20134687 U JP 20134687U JP H0314246 Y2 JPH0314246 Y2 JP H0314246Y2
- Authority
- JP
- Japan
- Prior art keywords
- workpiece
- cylinder
- finishing
- piston
- center
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000003754 machining Methods 0.000 claims description 22
- 210000000078 claw Anatomy 0.000 claims description 18
- 238000005520 cutting process Methods 0.000 description 8
- 239000012530 fluid Substances 0.000 description 5
- 238000005452 bending Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
Landscapes
- Gripping On Spindles (AREA)
Description
【考案の詳細な説明】
産業上の利用分野
この考案は工作物端面に爪を引掛けて回転を与
える改良されたフエイスドライバに関する。[Detailed Description of the Invention] Industrial Field of Application This invention relates to an improved face driver that hooks a claw onto the end face of a workpiece to give it rotation.
従来技術
従来フエイスドライバを用いて軸物工作物の加
工を行う場合同一の爪で荒加工と仕上げ加工とを
継続して行つていた。この同一爪による加工方法
は荒加工時には爪を高圧力で工作物に押付けて重
切削を行い、仕上げ加工時に爪を低圧力に切換え
て推力を小さくし同時に心押軸の推力も小さくし
て加工を行つた。Prior Art Conventionally, when machining a shaft workpiece using a face driver, rough machining and finishing machining were performed continuously using the same jaw. This machining method using the same jaw is used to perform heavy cutting by pressing the jaw against the workpiece under high pressure during rough machining, and during finishing machining, the jaw is switched to low pressure to reduce the thrust and at the same time, the thrust of the tailstock shaft is also reduced. I went there.
考案が解決しようとする問題点
同一爪で荒加工に引続いて仕上げ加工を行う場
合、爪と心押軸の推力を小さくしても荒加工時の
爪の喰い込み跡にならつて工作物に曲げを発生さ
せ、例えば0.01mmTIR以上の振れ精度を確保する
ことが難しいという問題点を有していた。Problems that the invention aims to solve: When performing rough machining followed by finishing machining with the same jaw, even if the thrust of the jaw and tailstock is reduced, the bite marks of the jaw during rough machining will be imitated and the workpiece will be damaged. This has the problem that bending occurs and it is difficult to ensure runout accuracy of, for example, 0.01 mmTIR or higher.
問題点を解決するための手段
工作物Ｗ端面に爪を引掛けて工作物に回転を与
えるフエイスドライバにおいて、回転中心からの
位置を違えて荒加工用と、仕上げ用の２種類の爪
８，１３を軸線方向に出入可能に取付け、該２種
類の爪をそれぞれ別々に高推力、低推力で作動さ
せるようになしたものである。Means for Solving the Problem In a face driver that rotates the workpiece by hooking the claw onto the end face of the workpiece W, two types of claws 8, one for rough machining and one for finishing, are provided at different positions from the center of rotation. 13 is attached so that it can be moved in and out in the axial direction, and the two types of claws are operated separately with high thrust and low thrust.
実施例
以下本考案の実施例を図面にもとづき説明す
る。旋盤の主軸１の先端にドライバ本体２がボル
ト３により取付けられ、ドライバ本体２の先端部
回転中心にセンタ４が嵌着されている。更にドラ
イバ本体２の先端部に回転中心に対して半径の異
なる同心円上等分複数個所に回転中心線と平行に
中心に近く仕上爪用穴２ａと中心より離れて荒加
工用穴２ｂがそれぞれ互いに位相をづらして穿設
され、穴２ａ，２ｂの奥に同心の流体圧シリンダ
５，６がそれぞれ設けられている。シリンダ５に
嵌挿されるピストン７のピストンロツドを兼ねる
仕上加工用爪体８が穴２ａに移動可能に嵌挿さ
れ、爪体８の先端に喰込用爪先部８ａが設けられ
ている。そして爪体８はシリンダ５内に介装され
たばね９により常時引込勝手に付勢され、位置決
めボルト１０により爪先部８ａのシヤープエツジ
が回転側を向くように規制されている。更にシリ
ンダ６に嵌挿されるピストン１２のピストンロツ
ドを兼ねる荒加工用爪体１３が穴２ｂに移動可能
に嵌挿され、爪体１３の先端に爪先部１３ａが設
けられている。そして爪体１３はばね１４により
常時引込勝手に付勢され、位置決めボルト１５に
より爪先部１３ａのシヤープエツジが回転側を向
くように規制されている。Embodiments Hereinafter, embodiments of the present invention will be described based on the drawings. A driver body 2 is attached to the tip of a main shaft 1 of a lathe with a bolt 3, and a center 4 is fitted around the rotation center of the tip of the driver body 2. Further, at the tip of the driver body 2, there are holes 2a for finishing claws near the center parallel to the center line of rotation and holes 2b for rough machining away from the center at multiple equally spaced concentric circles with different radii relative to the center of rotation. The holes 2a and 2b are bored out of phase with each other, and concentric fluid pressure cylinders 5 and 6 are provided deep inside the holes 2a and 2b, respectively. A finishing pawl 8, which also serves as a piston rod of a piston 7 fitted into the cylinder 5, is movably fitted into the hole 2a, and a biting tip 8a is provided at the tip of the pawl 8. The pawl body 8 is always urged to retract by a spring 9 interposed within the cylinder 5, and is regulated by a positioning bolt 10 so that the sharp edge of the pawl portion 8a faces the rotation side. Further, a rough machining pawl 13, which also serves as a piston rod of the piston 12 fitted into the cylinder 6, is movably fitted into the hole 2b, and a tip portion 13a is provided at the tip of the pawl 13. The pawl body 13 is always urged to retract by a spring 14, and is restricted by a positioning bolt 15 so that the sharp edge of the pawl portion 13a faces the rotation side.
主軸１の後端に大径シリンダ１７と小径シリン
ダ１８とを同心に有するダブル回転シリンダ体１
９が同心に固着されており、大径シリンダ１７に
嵌挿されるピストン２０のピストンロツド２１は
主軸１中心穴１ａ内に軸方向に移動可能に嵌挿さ
れるズローチユーブ２２の後端に螺着されてい
る。そしてドライバ本体２の後端部に刻設された
同心の環状溝が流路２４によつてシリンダ６に連
通されるシリンダ２５に形成され、このシリンダ
２５にドローチユーブ２２先端の環状ピストン２
６が嵌挿されており、シリンダ２５及びシリンダ
６の油密室及び流路２４内に密封された油圧用流
体によりピストン２０，２６の前進で荒加工用爪
体１３がばね１４の力に抗して前進し工作物Ｗの
端面に爪先部１３ａが圧接されて喰込むようにな
つている。また小径シリンダ１８に嵌通されるピ
ストン２７のピストンロツド２８はピストン２０
の中心穴に移動可能に嵌挿され、先端にドローチ
ユーブ２２内に遊に挿通されるドローバ２９の後
端が螺着されている。そしてドローバ２９の先端
のピストン３０はドライバ本体２の後端部中心に
穿設されたシリンダ３２に嵌挿されている。そし
てシリンダ３２は流路３３によつてシリンダ５に
連通され、シリンダ５，３２の油密室及び流路３
３内に密封される油圧用流体によつてピストン２
７，３０の前進で仕上加工用爪体８がばね９の力
に抗して前進し工作物Ｗの端面に荒加工用爪体１
３より低い力で圧接されるようになつている。 Double rotating cylinder body 1 having a large diameter cylinder 17 and a small diameter cylinder 18 concentrically at the rear end of the main shaft 1
9 are fixed concentrically, and the piston rod 21 of the piston 20, which is fitted into the large diameter cylinder 17, is screwed to the rear end of a narrow tube 22 which is fitted into the center hole 1a of the main shaft 1 so as to be movable in the axial direction. . A concentric annular groove carved in the rear end of the driver body 2 is formed in a cylinder 25 that communicates with the cylinder 6 through a flow path 24, and an annular piston 2 at the tip of the draw tube 22 is connected to the cylinder 25.
6 is fitted and inserted, and the rough machining claw body 13 resists the force of the spring 14 as the pistons 20 and 26 move forward due to the hydraulic fluid sealed in the oil-tight chambers and flow paths 24 of the cylinder 25 and cylinder 6. The toe portion 13a is pressed against the end surface of the workpiece W and bites into it. Also, the piston rod 28 of the piston 27 that is fitted into the small diameter cylinder 18 is connected to the piston 20.
The rear end of a draw bar 29, which is movably inserted into the center hole of the draw bar 29 and loosely inserted into the draw tube 22, is screwed to the tip end. A piston 30 at the tip of the drawbar 29 is fitted into a cylinder 32 bored in the center of the rear end of the driver body 2. The cylinder 32 is communicated with the cylinder 5 through a passage 33, and the oil-tight chambers of the cylinders 5 and 32 and the passage 3 are connected to each other.
Piston 2 by hydraulic fluid sealed within 3
7 and 30, the finishing pawl 8 moves forward against the force of the spring 9, and the rough machining pawl 1 is attached to the end surface of the workpiece W.
It is designed to be pressed with a force lower than 3.
大径シリンダ１７及び小径シリンダ１８に供給
される圧油は、油圧源Ｐより供給される元圧を圧
力調整弁３５，３６によつて所定圧に減圧して切
換え弁３７，３８にそれぞれ供給し、切換え弁３
７、管路３９，４０を介して静止形分配器４３に
連通され、分配器４３を介して回転シリンダ体１
９内の流路４４，４５を経て小径シリンダ１８に
連通されている。また切換え弁３８は管路４１，
４２を介して分配器４３に連通され、流路４６，
４７を経て大径シリンダ１７に連通され、切換え
弁３７の切換えでピストン２７が、切換え弁３８
の切換えでピストン２０がそれぞれ別々に移動す
るようになつている。 Pressure oil is supplied to the large-diameter cylinder 17 and the small-diameter cylinder 18 by reducing the original pressure supplied from the hydraulic source P to a predetermined pressure using pressure regulating valves 35 and 36, and then supplying the pressure oil to switching valves 37 and 38, respectively. , switching valve 3
7. Connected to a stationary distributor 43 via pipes 39 and 40, and connected to the rotating cylinder body 1 via the distributor 43.
The small diameter cylinder 18 is communicated with the small diameter cylinder 18 through flow passages 44 and 45 in the cylinder 9 . Further, the switching valve 38 is connected to the pipe line 41,
42 to the distributor 43, and the flow path 46,
47 to the large diameter cylinder 17, and when the switching valve 37 is switched, the piston 27 is connected to the switching valve 38.
By switching, the pistons 20 are moved separately.
作 用
今センタ４と図示しない心押センタ間に取付け
られた工作物Ｗは荒加工用の強い心押推力で支持
されている。切換え弁３８が切換えられて圧油が
管路４１、流路４６を経て大径シリンダ１７の後
室に供給され、ピストン２０が前進してドローチ
ユーブ２２を介して環状ピストン２６が前進し、
流路２４を介して密封された油圧用流体を各シリ
ンダ６に送り込みピストン１２がばね１４の力に
抗して前進し、工作物Ｗ端面の回転中心に対する
同心円上等分複数個所に荒引加工用爪体１３の先
端爪先部１３ａが圧接されて工作物に喰込み、主
軸１の回転で工作物Ｗが回転され荒切削加工が行
われる。荒切削加工が終わると切換え弁３８が切
換えられて圧油が管路４２、流路４７を介して大
径シリンダ１７の前室に供給され、ピストン２
０、環状ピストン２６が後退し、同時に荒加工用
爪体１３がばね１４の力で後退して爪先部１３ａ
が工作物Ｗ端面から離れる。次いで切換え弁３７
が切換えられて圧油が管路３９、流路４４を経て
小径シリンダ１８の後室に供給され、ピストン２
７が前進してドローバ２９を介してピストン３０
が前進し、密封された油圧用流体が流路３３を通
つてシリンダ５に送り込まれ、ピストン７がばね
９の力に抗して前進し、仕上加工用爪体８の先端
爪先部８ａが荒切削加工の終わつた工作物Ｗ端面
の前述の荒引用爪先部１３ａの喰込み跡より内側
の新しい位置に仕上切削に耐え得る程度の小さな
推力で圧接される。Operation The workpiece W attached between the center 4 and a tailstock center (not shown) is supported by a strong tailstock thrust for rough machining. The switching valve 38 is switched and pressure oil is supplied to the rear chamber of the large diameter cylinder 17 through the pipe line 41 and the flow path 46, the piston 20 moves forward, and the annular piston 26 moves forward via the draw tube 22.
The sealed hydraulic fluid is sent to each cylinder 6 through the flow path 24, and the piston 12 moves forward against the force of the spring 14, and rough machining is performed at multiple locations equally on a concentric circle with respect to the rotation center of the end face of the workpiece W. The tip end portion 13a of the cutting claw body 13 is pressed into contact with the workpiece, and the workpiece W is rotated by the rotation of the main shaft 1 to perform rough cutting. When the rough cutting process is completed, the switching valve 38 is switched and pressure oil is supplied to the front chamber of the large diameter cylinder 17 via the pipe line 42 and the flow path 47, and the piston 2
0, the annular piston 26 retreats, and at the same time, the rough machining claw body 13 retreats by the force of the spring 14, and the toe portion 13a
is separated from the end face of the workpiece W. Next, the switching valve 37
is switched, pressure oil is supplied to the rear chamber of the small diameter cylinder 18 via the pipe line 39 and the flow path 44, and the piston 2
7 moves forward and the piston 30 passes through the drawbar 29.
moves forward, the sealed hydraulic fluid is sent into the cylinder 5 through the flow path 33, the piston 7 moves forward against the force of the spring 9, and the tip tip portion 8a of the finishing claw body 8 is roughened. It is pressed to a new position on the end surface of the workpiece W, which has been cut, on the inner side of the bite mark of the rough cutting toe portion 13a with a small thrust sufficient to withstand finish cutting.
そして心押軸の推力が低圧側に切換えられて小
さくされ、主軸が回転して仕上切削加工が行われ
る。仕上切削加工が終わると切換え弁３７が切換
えられて圧油が管路４０、流路４５を経て小径シ
リンダ１８の前室に供給され、ドローバ２９を介
してピストン３０が後退し同時にばね９の力で仕
上加工用爪体８が後退する。 Then, the thrust of the tailstock shaft is switched to the low pressure side and reduced, and the main shaft rotates to perform finish cutting. When finishing cutting is completed, the switching valve 37 is switched and pressure oil is supplied to the front chamber of the small diameter cylinder 18 via the pipe line 40 and flow path 45, and the piston 30 moves back via the drawbar 29, and at the same time the force of the spring 9 is applied. The finishing claw body 8 is moved back.
効 果
以上詳述したように本考案は回転中心から異な
る位置に荒引加工用と仕上加工用の２種類の爪を
軸方向に移動可能に設け、主軸後端のダブルシリ
ンダにより作業内容に合わせて異なる推力で別々
に作動するようになし、更に心押軸推力も作業内
容に合わせて切替えるようになしたので、仕上加
工爪は常に新しい端面を押すことになり荒加工用
爪の喰込み跡に爪がならつて工作物に曲げを発生
することがなく、更に推力が小さくかつ回転中心
に近い位置に爪が当たることにより工作物端面の
直角精度が工作物に及ぼす曲げの影響を小さくす
ることが可能となり、振れ精度のいい高精度加工
ができる効果を有する。Effects As detailed above, the present invention has two types of pawls for roughing and finishing that are movable in the axial direction at different positions from the center of rotation, and a double cylinder at the rear end of the spindle that can be adjusted to suit the work content. The finishing jaws are now operated separately with different thrust forces, and the tailstock thrust is also switched according to the work content, so the finishing jaws are always pushing against the new end face, which eliminates the biting marks of the roughing jaws. The jaws do not line up and cause bending on the workpiece, and furthermore, the thrust is small and the jaws hit a position close to the center of rotation, which reduces the effect of bending on the workpiece due to the perpendicular accuracy of the end face of the workpiece. This has the effect of enabling high-precision machining with good run-out accuracy.
第１図は切断面で表した本考案の説明図であ
る。
１……主軸、２……ドライバ本体、８……仕上
加工用爪体、１３……荒加工用爪体、１９……回
転シリンダ体。
FIG. 1 is an explanatory diagram of the present invention shown in a cut plane. DESCRIPTION OF SYMBOLS 1... Main shaft, 2... Driver body, 8... Claw body for finishing machining, 13... Claw body for rough machining, 19... Rotating cylinder body.
Claims (1)
るフエイスドライバにおいて、回転中心から近い
側に仕上用のドライブ爪を油圧によつて軸線方向
に出入可能に設け、回転中心から遠い側に荒加工
用のドライブ爪を油圧によつて軸線方向に出入可
能に設け、該荒加工用のドライブ爪を高推力で仕
上用のドライブ爪を低推力でそれぞれ別々に作動
させるように構成したことを特徴とするダブルフ
エイスドライバ。 In a face driver that rotates a workpiece by hooking a claw on the end face of the workpiece, a finishing drive claw is provided on the side near the center of rotation so that it can be moved in and out in the axial direction by hydraulic pressure, and a finishing drive claw is provided on the side far from the center of rotation so that it can be moved in and out in the axial direction. A drive claw for machining is provided so that it can be moved in and out in the axial direction by hydraulic pressure, and the drive claw for rough machining is operated with a high thrust and the drive claw for finishing is operated separately with a low thrust. A double face driver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987201346U JPH0314246Y2 (en) | 1987-12-28 | 1987-12-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987201346U JPH0314246Y2 (en) | 1987-12-28 | 1987-12-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01101712U JPH01101712U (en) | 1989-07-10 |
| JPH0314246Y2 true JPH0314246Y2 (en) | 1991-03-29 |
Family
ID=31491710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987201346U Expired JPH0314246Y2 (en) | 1987-12-28 | 1987-12-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0314246Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014151386A (en) * | 2013-02-07 | 2014-08-25 | Murata Mach Ltd | Lathe |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0128964Y2 (en) * | 1985-02-18 | 1989-09-04 |
-
1987
- 1987-12-28 JP JP1987201346U patent/JPH0314246Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01101712U (en) | 1989-07-10 |
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