JPH0368768B2 - - Google Patents
Info
- Publication number
- JPH0368768B2 JPH0368768B2 JP59126011A JP12601184A JPH0368768B2 JP H0368768 B2 JPH0368768 B2 JP H0368768B2 JP 59126011 A JP59126011 A JP 59126011A JP 12601184 A JP12601184 A JP 12601184A JP H0368768 B2 JPH0368768 B2 JP H0368768B2
- Authority
- JP
- Japan
- Prior art keywords
- sleeve
- pin
- guide
- balls
- diameter
- 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 - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D17/00—Forming single grooves in sheet metal or tubular or hollow articles
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sliding-Contact Bearings (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、軸とスリーブを有し、スリーブの軸
受内径面に動圧発生溝を有する流体軸受の製造装
置に関するものである。DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to an apparatus for manufacturing a fluid bearing, which has a shaft and a sleeve, and has dynamic pressure generating grooves on the inner diameter surface of the bearing of the sleeve.
従来例の構成とその問題点
従来、溝付きの流体軸受とは、第１図に示すよ
うに軸１がスリーブ２の内径に回転自在に挿入さ
れ、スリーブの内径には動圧発生溝２Ａが設けら
れ、また軸とスリーブの協働面には潤滑剤が注油
されており、軸１またはスリーブ２のいずれか一
方が回転することにより動圧発生溝２Ａのポンピ
ング作用で圧力を発生するものである。比較的軟
かい金属材料からなるスリーブ２にこの種の軸受
の動圧発生溝２Ａを加工する方法としては硬質な
ボールを用いて塑性加工する方法があるが、従来
その具体的製造装置として第２図に示す装置があ
る。図のように硬質な回転ピン３をスリーブ２の
穴２Ｂと同軸上に回転自在に設け、このスリーブ
２と回転ピン３の間にはガイドパイプ５を同軸か
つ回転自在に設けこのガイドパイプ５には中心軸
の回りに対称的に配置された複数個のガイド穴５
Ａを有し、そこには硬質なボール９Ａ，９Ｂが転
動自在にはめ合わされている。Conventional Structure and Problems Conventionally, a grooved hydrodynamic bearing has a shaft 1 rotatably inserted into the inner diameter of a sleeve 2, as shown in Fig. 1, and a dynamic pressure generating groove 2A formed in the inner diameter of the sleeve. The cooperating surfaces of the shaft and the sleeve are lubricated with lubricant, and when either the shaft 1 or the sleeve 2 rotates, pressure is generated by the pumping action of the dynamic pressure generating groove 2A. be. As a method for machining the dynamic pressure generating grooves 2A of this type of bearing in the sleeve 2 made of a relatively soft metal material, there is a method of plastic working using hard balls. There is a device shown in the figure. As shown in the figure, a hard rotating pin 3 is provided coaxially and rotatably with the hole 2B of the sleeve 2, and a guide pipe 5 is provided coaxially and freely rotatably between the sleeve 2 and the rotating pin 3. is a plurality of guide holes 5 arranged symmetrically around the central axis.
A, into which hard balls 9A and 9B are fitted in a freely rolling manner.
このときスリーブ２に対して回転ピン３にWP
の回転速度とVPの送り速度を与えると共にこの
回転により回転ピン３とスリーブ２Ｂの間で転動
するボール４Ａ，４Ｂにガイドパイプ５が追従す
るかのようにガイドパイプ５にWKの回転速度と
VKの送り速度を与えてボール４Ａ，４Ｂにより
スリーブ２に塑性加工を施すものであつた。 At this time, W P is applied to the rotating pin 3 with respect to the sleeve 2.
This rotation causes the guide pipe 5 to rotate by W K as if it were to follow the balls 4A and 4B rolling between the rotating pin 3 and the sleeve 2B. speed and
The sleeve 2 was plastically worked by the balls 4A and 4B at a feed rate of VK .
ところが従来のこの製造装置においては回転ピ
ン３とガイドパイプ５にそれぞれ別の回転速度
WP，WKを与えねばならないので製造設備が複雑
になること、また回転ピン３はテーパがなくスト
レートであることが望ましいが、どうしても部分
的に２〜３ミクロンメータの直径のバラツキがで
るものであり、このとき回転ピン３とガイドパイ
プ５の送り速度VPとVKに少しのズレが生じたと
きにボール４Ａ，４Ｂが接する部分での回転ピン
３の直径が変化し、わずかにボール４Ａ，４Ｂが
ガイド穴５Ａ，５Ｂの中で出入りし、加工する動
圧発生溝２Ａの深さに数ミクロメータのバラツキ
が生じることがあつた。このバラツキは軸受の回
転性能に損うのでとくに大きな欠点になるもので
あつた。 However, in this conventional manufacturing equipment, the rotating pin 3 and the guide pipe 5 have different rotational speeds.
The manufacturing equipment becomes complicated because W P and W K must be given, and although it is desirable that the rotating pin 3 be straight without a taper, it is inevitable that the diameter will vary by 2 to 3 micrometers in some parts. At this time, when there is a slight deviation between the feed speeds V P and V K of the rotating pin 3 and the guide pipe 5, the diameter of the rotating pin 3 at the part where the balls 4A and 4B touch changes, and the ball slightly 4A and 4B move in and out of the guide holes 5A and 5B, and the depth of the dynamic pressure generating groove 2A to be machined may vary by several micrometers. This variation was a particularly large drawback since it impairs the rotational performance of the bearing.
発明の目的
本発明は上記従来の欠点を解消するものであり
動圧発生溝の製造装置に係わり、その深さのバラ
ツキを少なく、高精度に加工でき、かつ製造設備
を簡単にするものである。Purpose of the Invention The present invention solves the above-mentioned conventional drawbacks and relates to a manufacturing device for dynamic pressure generating grooves, which reduces variation in depth, can be processed with high precision, and simplifies manufacturing equipment. .
発明の構成
本発明は、中心軸に対して対称的でかつ放射線
上に配置された複数個のガイド穴と、このガイド
穴に連結する中心穴を有するガイドピンの前記ガ
イド穴に硬質な複数個のボールを有し、中心穴に
は硬質な固定ピンを固定し、流体軸受のスリーブ
内径よりも前記固定ピンの直径とボール２個分の
直径の合計をわずかに大きく組合わせ、前記ガイ
ドの軸に回転および送り速度を与れる手段とを有
しており、前記スリーブ内径に動圧発生溝を高精
度にかつ容易に形成することができるという効果
を有する。Structure of the Invention The present invention provides a guide pin having a plurality of guide holes arranged radially and symmetrically with respect to a central axis, and a center hole connected to the guide holes. A hard fixing pin is fixed in the center hole, and the sum of the diameter of the fixing pin and the diameter of the two balls is slightly larger than the inner diameter of the sleeve of the fluid bearing, and the axis of the guide is It has the effect that a dynamic pressure generating groove can be formed easily and with high precision in the inner diameter of the sleeve.
実施例の説明
以下に本発明実施例を第３図にもとづいて説明
する。ガイドピン６には中心軸に対称でかつ放射
線状に配置された複数個のガイ穴６Ａ，６Ｂを有
し、また中心には穴６Ｃを有する。このガイド穴
６Ａ，６Ｂには硬質なボール７Ａ，７Ｂが挿入も
しくは軽く圧入され、また穴６Ｃには硬質な固定
ピン８が圧入されている。またスリーブ２の内径
よりも固定ピンの直径とボール７Ａ，７Ｂの２個
分の直径の合計はわずかに大きくなるよう固定ピ
ン８の直径は選定されている。この状態でスリー
ブ２の穴２Ｂの中でガイドピン６に回転速度Ｗと
共に送り速度Ｖを与えると動圧発生溝２Ａはボー
ル７Ａ，７Ｂによる塑性加工により形成される。
第１図に示すようなヘリングボーン型の動圧発生
溝２Ａを加工するにあたつては、第３図において
スリーブ２の略中央までボール７Ａ，７Ｂが進ん
だときにガイドピン６の送り速度Ｖは変えずに回
転速度Ｗを逆方向に切替えることにより形成する
ことができる。DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. The guide pin 6 has a plurality of guy holes 6A, 6B arranged radially and symmetrically about the central axis, and has a hole 6C in the center. Hard balls 7A and 7B are inserted or lightly press-fitted into the guide holes 6A and 6B, and a hard fixing pin 8 is press-fitted into the hole 6C. Further, the diameter of the fixing pin 8 is selected so that the sum of the diameter of the fixing pin and the diameters of the two balls 7A and 7B is slightly larger than the inner diameter of the sleeve 2. In this state, when the rotational speed W and feed speed V are applied to the guide pin 6 in the hole 2B of the sleeve 2, the dynamic pressure generating groove 2A is formed by plastic working by the balls 7A and 7B.
When machining the herringbone type dynamic pressure generating groove 2A as shown in FIG. 1, the feed rate of the guide pin 6 is V can be formed by switching the rotational speed W in the opposite direction without changing it.
このように本発明においては動圧発生溝２Ａを
形成するためにあたりガイドピン６だけ送りおよ
び回転速度を与えればいので製造設備が簡単にな
る。また固定ピン８はガイドピン６に固定されて
いるため、従来のようにボール７Ａ，７Ｂの部分
で直径が変化することがないため動圧発生溝の深
さにバラツキが生じない。とくにこの溝の深さは
10ミクロンメータ程度と浅いため、２ミクロンメ
ータ程度の深さのバラツキが流体軸受の性能、信
頼性に大きな影響を与えるのでとくにこれは重要
な課題であつた。 As described above, in the present invention, in order to form the dynamic pressure generating groove 2A, only the feed and rotation speed of the guide pin 6 need be applied, so that the manufacturing equipment is simplified. Further, since the fixed pin 8 is fixed to the guide pin 6, the diameter does not change at the balls 7A, 7B unlike in the conventional case, so there is no variation in the depth of the dynamic pressure generating groove. In particular, the depth of this groove is
This was a particularly important issue because the depth is as shallow as about 10 micrometers, and variations in depth of about 2 micrometers have a large impact on the performance and reliability of the hydrodynamic bearing.
尚、ボール７Ａ，７Ｂはガイド穴６Ａ，６Ｂの
中に転動自在に挿入しても、また圧入固定しても
よいが、圧入固定した方がボール７Ａ，７Ｂ自身
の真円度の狂いの影響がないため溝深さのバラツ
キがより少ない。 The balls 7A, 7B may be inserted into the guide holes 6A, 6B so as to be able to roll freely, or may be press-fitted and fixed, but it is better to press-fit and fix the balls 7A, 7B to prevent the balls 7A, 7B from out of roundness. Since there is no influence, there is less variation in groove depth.
発明の効果
このように本発明はガイドピンに固定ピンと硬
質なボールを取付け、スリーブ内で回転および送
り速度を与えることにより溝深さのバラツキなく
高精度かつ簡単に動圧発生溝を加工するという特
徴を有している。Effects of the Invention As described above, the present invention attaches a fixed pin and a hard ball to a guide pin, and rotates and feeds the ball within the sleeve, thereby easily machining a dynamic pressure generating groove with high accuracy and without variation in groove depth. It has characteristics.
第１図は本発明に係わる溝付き流体軸受の断面
図、第２図は従来のスリーブ内径に溝を形成する
製造装置の断面図、第３図は本発明の一実施例に
おけるスリーブ内径に溝を形成する製造装置の断
面図である。
１……軸、２……スリーブ、２Ａ……動圧発生
溝、６……ガイドピン、６Ａ，６Ｂ……ガイド
穴、６Ｃ……中心穴、７Ａ，７Ｂ……ボール、８
……固定ピン。
Fig. 1 is a cross-sectional view of a grooved hydrodynamic bearing according to the present invention, Fig. 2 is a cross-sectional view of a conventional manufacturing apparatus for forming grooves on the inner diameter of a sleeve, and Fig. 3 is a cross-sectional view of a grooved hydrodynamic bearing according to an embodiment of the present invention. 1 is a cross-sectional view of a manufacturing apparatus for forming a 1...Shaft, 2...Sleeve, 2A...Dynamic pressure generating groove, 6...Guide pin, 6A, 6B...Guide hole, 6C...Center hole, 7A, 7B...Ball, 8
...Fixed pin.
Claims (1)
スリーブの孔に同軸上に挿入し、ガイドピンを回
転および軸方向に送りを設けてスリーブの内面に
溝を設け、前記スリーブと軸とで動圧型の流体軸
受を形成する流体軸受の製造装置であつて、前記
ガイドピンは中心軸に対して対称的にかつ放射状
に配置された複数個のガイド穴と前記ガイド穴に
連結する中心穴を有し、かつ前記ガイド穴に挿入
された前記スリーブよりも硬質な複数個のボール
と前記ガイドピンの中心穴に固定された前記スリ
ーブよりも硬質な固定ピンを有し、前記スリーブ
内径よりも前記固定ピンの直径とボール２個分の
直径の総合計をわずかに大きくなるよう組合され
た流体軸受の製造装置。1. A guide pin having a plurality of balls on the outer periphery is coaxially inserted into the hole of the sleeve, the guide pin is rotated and fed in the axial direction, a groove is provided on the inner surface of the sleeve, and the sleeve and shaft move together. A fluid bearing manufacturing apparatus for forming a pressure-type fluid bearing, wherein the guide pin has a plurality of guide holes arranged radially and symmetrically with respect to a central axis, and a center hole connected to the guide holes. and a plurality of balls that are harder than the sleeve inserted into the guide hole, and a fixing pin that is harder than the sleeve and fixed to the center hole of the guide pin, and the fixing pin is harder than the inner diameter of the sleeve. A fluid bearing manufacturing device that combines the diameter of the pin and the diameter of two balls to be slightly larger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59126011A JPS616426A (en) | 1984-06-19 | 1984-06-19 | Method of manufacturing fluid bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59126011A JPS616426A (en) | 1984-06-19 | 1984-06-19 | Method of manufacturing fluid bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS616426A JPS616426A (en) | 1986-01-13 |
| JPH0368768B2 true JPH0368768B2 (en) | 1991-10-29 |
Family
ID=14924516
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59126011A Granted JPS616426A (en) | 1984-06-19 | 1984-06-19 | Method of manufacturing fluid bearing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS616426A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0280814A (en) * | 1988-09-19 | 1990-03-20 | Hitachi Ltd | Method of manufacturing dynamic pressure bearing |
| JPH0290335A (en) * | 1988-09-28 | 1990-03-29 | Hitachi Ltd | Remote operation control method for computer systems |
| US5265334A (en) * | 1989-09-21 | 1993-11-30 | U.S. Philips Corporation | Device for manufacturing a groove bearing, and method of manufacturing a groove bearing by means of the device |
| US5349675A (en) * | 1990-09-04 | 1994-09-20 | International Business Machines Corporation | System for directly displaying remote screen information and providing simulated keyboard input by exchanging high level commands |
| JP2005256968A (en) | 2004-03-12 | 2005-09-22 | Matsushita Electric Ind Co Ltd | Hydrodynamic bearing device |
| TWI265247B (en) * | 2006-01-03 | 2006-11-01 | Delta Electronics Inc | Dynamic bearing manufacturing method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58152334U (en) * | 1982-04-03 | 1983-10-12 | 東京貿易株式会社 | Core for inserting into pipe body |
-
1984
- 1984-06-19 JP JP59126011A patent/JPS616426A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS616426A (en) | 1986-01-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |