JPS61147885A - Fluid bearing device and its production - Google Patents

Fluid bearing device and its production

Info

Publication number
JPS61147885A
JPS61147885A JP26669184A JP26669184A JPS61147885A JP S61147885 A JPS61147885 A JP S61147885A JP 26669184 A JP26669184 A JP 26669184A JP 26669184 A JP26669184 A JP 26669184A JP S61147885 A JPS61147885 A JP S61147885A
Authority
JP
Japan
Prior art keywords
shaft
fluid bearing
grooves
edges
etching
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.)
Pending
Application number
JP26669184A
Other languages
Japanese (ja)
Inventor
Masanori Aoki
青木 正憲
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP26669184A priority Critical patent/JPS61147885A/en
Publication of JPS61147885A publication Critical patent/JPS61147885A/en
Pending legal-status Critical Current

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  • Sliding-Contact Bearings (AREA)
  • ing And Chemical Polishing (AREA)

Abstract

PURPOSE:To produce a fluid bearing device which is free from seizure by etching a shaft or bearing for the fluid bearing to provide grooves of a prescribed shape thereto then polishing the surface thereof to curve approximately the edges of the grooves. CONSTITUTION:A printing part 1a of an etching resistant agent is formed on the surface of a shaft 1 for the fluid bearing and the shaft is etched by which the grooves 1b of the prescribed shape for retaining a lubricating oil are formed to the shaft. Said shaft is then polished by a lapping tape, etc. by which projections such as burrs and edges are removed from the grooves 1b to curve approximately the edges of the grooves 1b. The fluid bearing is assembled by using the shaft 1 constituted in the above-mentioned. The reliable device which prevents the abrasion of the mating material and is free from seizure is thus obtd.

Description

【発明の詳細な説明】 産業上の利用分野 本発明はビデオテープレコーダー(VTR)のシリンダ
の軸受部分等に利用することができ、流体軸受装置及び
その製造方法に関するものである。
DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention can be applied to a bearing portion of a cylinder of a video tape recorder (VTR), and relates to a hydrodynamic bearing device and a method for manufacturing the same.

従来の技術 近年、流体軸受装置は、VTRのシリンダ等精密且つ、
高回転の軸受部分に利用されている。以下図面を参照し
ながら従来の流体軸受装置及びその製造方法の一例につ
いて説明する。
BACKGROUND OF THE INVENTION In recent years, hydrodynamic bearing devices are used for precision and
Used in high-speed bearing parts. An example of a conventional hydrodynamic bearing device and its manufacturing method will be described below with reference to the drawings.

第4図のシャフト1は上部溝2と下部溝3が設けられ、
下シリンダ13に圧入固定されている。
The shaft 1 in FIG. 4 is provided with an upper groove 2 and a lower groove 3,
It is press-fitted and fixed to the lower cylinder 13.

シャフト1とスラスト受板4の隙間及びディスク5との
隙間には油が注入されており、シャフト1に対し、スラ
スト受板4、ディスク6及び上シリンダ12が一体とな
って回転する。
Oil is injected into the gap between the shaft 1 and the thrust receiving plate 4 and the gap between the disk 5, and the thrust receiving plate 4, disk 6, and upper cylinder 12 rotate together with respect to the shaft 1.

第5図はエツチング後のシャフト1及びその外観の展開
図であり、深さ数ミクロンメータの上部溝2と下部溝3
がある。
FIG. 5 is a developed view of the shaft 1 and its appearance after etching, showing an upper groove 2 and a lower groove 3 with a depth of several micrometers.
There is.

第6図は、軸受であるスラスト受板4のシャフト1の当
たシ方向の面であり深さ数ミクロンメータのスパイラル
状溝6が設けである。この溝の製造方法はシャフト1及
びスラスト受板4に耐エツチング性の液をスクリーン印
刷等で印刷する。次にエツチング液の中に入れてエツチ
ング処理をする方法が取られ、そのまま洗浄、乾燥して
組立てられていた。
FIG. 6 shows the surface of the thrust receiving plate 4, which is a bearing, in the direction in which the shaft 1 touches, and is provided with a spiral groove 6 having a depth of several micrometers. This groove is manufactured by printing an etching-resistant liquid on the shaft 1 and the thrust receiving plate 4 by screen printing or the like. Next, they were placed in an etching solution for etching, and then assembled after being washed and dried.

発明が解決しようとする問題点 しかしながら上記のような従来の製造方法では、製造さ
れたシャフト1とスラスト受板4を観察すると、エツチ
ングされていない表面とエツチングされ溝になった部分
との境界部において第2図に示すような数ミクロンメー
タのパリ10やエツジが発生していることが解明でき、
そしてこのパリ1oやエツジが発生していると回転中に
焼きつきを起こし止まることがあった。
Problems to be Solved by the Invention However, in the conventional manufacturing method as described above, when observing the manufactured shaft 1 and thrust receiving plate 4, it is found that the boundary between the unetched surface and the etched grooved portion is observed. It was found that Paris 10 and edges of several micrometers in size were generated as shown in Figure 2.
If this pari 1o or edge occurs, it may cause seizure during rotation and stop.

すなわち、流体軸受装置は、規定回転数以上になると流
体圧で浮上し、非接触で回転するが、起動時や停止時に
おいては流体圧がほとんど発生せず、普通のメタル接触
をしなから摺動回転する。
In other words, a hydrodynamic bearing device levitates due to fluid pressure and rotates without contact when the rotation speed exceeds a specified number, but almost no fluid pressure is generated when starting or stopping, and it slides without making normal metal contact. Rotate.

そして、この時にシャフトや軸受けにパリやエツジがあ
るとそこに集中荷重が加わり相手を傷つけ摩耗させる事
で、切り粉を発生させる要因となっていた。そしてこの
切り粉が回転中に流体の流れにより一ケ所に集められメ
タル接触をおこしたり、あるいはこの集中された切9粉
によシシャフトが偏芯して回転させられる事で他の部分
が流体圧に反してメタル接触を起こすために焼きつきが
発生していた。また別の要因でシャフトが偏芯して回転
している場合にも、前記パリ等が流体圧に反して相手表
面に接触し、同様に切9粉を発生して焼きつきが出る事
が解明出来た。
At this time, if there are any cracks or edges on the shaft or bearing, a concentrated load is applied to them, damaging and abrading the other party, and causing chips to be generated. During rotation, these chips are collected in one place by the flow of fluid and cause metal contact, or the concentrated chips cause the shaft to rotate eccentrically, causing the fluid pressure in other parts to increase. On the other hand, seizure occurred due to metal contact. It has also been revealed that when the shaft rotates eccentrically due to another factor, the above-mentioned chips come into contact with the mating surface against the fluid pressure, causing chips to be generated and seizure to occur. done.

本発明では、パリやエツジ部に起因する焼きつきのない
、流体軸受装置及び、その製造方法を提供しようとする
ものである。
The present invention aims to provide a hydrodynamic bearing device and a method for manufacturing the same that is free from seizing caused by edges and edges.

問題点を解決するための手段 本発明は、エツチングによシ溝加工したシャフトあるい
は軸受を、ラッピングテープ等で研磨する事により、パ
リなどの突起物やエツジ部をなくしたものである。
Means for Solving the Problems The present invention eliminates protrusions and edges by polishing a shaft or bearing that has been grooved by etching with a lapping tape or the like.

作用 ラッピングテープ等で研磨すると表面と溝の境界部に発
生しているパリなどの突起物やエツジ部を無くす事がで
き、相手面の摩耗を防止する事によって焼きつきの発生
しない流体軸受装置を作ることができる。
By polishing with lapping tape, etc., it is possible to eliminate protrusions and edges that occur at the boundary between the surface and the groove, and by preventing wear on the mating surface, a hydrodynamic bearing device that does not cause seizing can be created. be able to.

実施例 以下本発明の一実施例の流体軸受装置の製造方法につい
て図面を参照しながら説明する。
EXAMPLE Hereinafter, a method for manufacturing a hydrodynamic bearing device according to an example of the present invention will be described with reference to the drawings.

第1図は本発明の実施例における流体軸受の製造方法を
示すものである。第1図において、(a)はシャフト、
(b)は耐エツチング液が印刷されたシャフト、(C)
はエツチング加工後のシャフトを示す。
FIG. 1 shows a method of manufacturing a fluid bearing according to an embodiment of the present invention. In Fig. 1, (a) is a shaft;
(b) is the shaft printed with anti-etching liquid, (C)
shows the shaft after etching.

12Lは印刷部分、1bはエツチングにより形成された
溝である。(d)はエツチング加工後のシャフト1をチ
ャック8でチャックし、モーター9で回転駆動させラフ
ピングテープ7をシャフト1に押圧しながら矢印方向へ
摺動させ研磨加工し完成品としている図である。この完
成品は第3図のように溝の縁にパリがなく滑らかな曲面
11が形成されている。なお1Gはシャフト表面、1d
は溝の底面である。
12L is a printed portion, and 1b is a groove formed by etching. (d) is a diagram in which the shaft 1 after etching is chucked with a chuck 8, rotated by a motor 9, and slid in the direction of the arrow while pressing the roughing tape 7 against the shaft 1 to polish it, resulting in a finished product. . As shown in FIG. 3, this finished product has no sharp edges on the edges of the grooves, and a smooth curved surface 11 is formed. Note that 1G is the shaft surface, 1d
is the bottom of the groove.

スラスト受板4の加工についても同様にできる。Processing of the thrust receiving plate 4 can be done in the same manner.

このような加工をするとパリ10及びエツジ部がなくな
るので、流体軸受として組み込んだとき、相手方のディ
スク6を摩耗させることなく、従って焼きつきなどを起
こす心配がない信頼性の高い流体軸受を得ることができ
る。
By performing such machining, the paris 10 and edge portions are eliminated, so that when assembled as a hydrodynamic bearing, the mating disk 6 is not worn out, and therefore a highly reliable hydrodynamic bearing without the risk of seizure etc. can be obtained. I can do it.

尚、溝の形状は軸受の種類に応じて自由な形の溝を研磨
することができる。また研磨方法としてはショツトブラ
スト研磨、エツチング研磨も適応できる。
Note that the shape of the groove can be polished according to the type of bearing. Further, as polishing methods, shot blast polishing and etching polishing are also applicable.

発明の効果 以上のように本発明は、流体軸受用の軸受の溝の表面を
研磨加工することにより、焼きつきなどを起こす心配が
なく信頼性の高い流体軸受装置を製造することができる
Effects of the Invention As described above, according to the present invention, by polishing the surface of the groove of a bearing for a hydrodynamic bearing, a highly reliable hydrodynamic bearing device can be manufactured without fear of seizure or the like.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明の一実施例における製造工程を示すもの
で、(2L)は印刷前のシャフトの上面図、(b)は印
刷後のシャフトの上面図、(0)はエツチング後のシャ
フトの上面図、(d)はラッピングテープで研磨加工中
の斜視図、第2図は第1図(C)のエツチング後の溝断
面形状を示す拡大図、第3図は研磨後の溝断面形状を示
す拡大図、第4図はVTRのシリンダに使用した流体軸
受の断面図、第5図(2L)はシャフトの上面図、(b
)はその展開図、第6図はスラスト受板の平面図である
。 1・・・…シャフト、1b・・・・・・溝、10・・・
0・シャフ上表面、1d・・・・・・溝底面、11・・
・・・・曲面。 代理人の氏名 弁理士 中 尾 敏 男 ほか1名第1
図 第2図 第3図 第 4121                   
  f・・・ 汁フL第6図
Figure 1 shows the manufacturing process in one embodiment of the present invention, where (2L) is a top view of the shaft before printing, (b) is a top view of the shaft after printing, and (0) is the top view of the shaft after etching. , (d) is a perspective view during polishing with a lapping tape, Fig. 2 is an enlarged view showing the cross-sectional shape of the groove after etching in Fig. 1 (C), and Fig. 3 is the cross-sectional shape of the groove after polishing. Figure 4 is a cross-sectional view of the hydrodynamic bearing used in the VTR cylinder, Figure 5 (2L) is a top view of the shaft, (b
) is its developed view, and FIG. 6 is a plan view of the thrust receiving plate. 1...Shaft, 1b...Groove, 10...
0. Shaft upper surface, 1d...Groove bottom surface, 11...
····curved surface. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3 Figure 4121
f... Soup L Figure 6

Claims (2)

【特許請求の範囲】[Claims] (1)流体軸受用の軸もしくは軸受に設けた溝の縁に略
曲面を形成したことを特徴とする流体軸受装置。
(1) A hydrodynamic bearing device characterized in that a substantially curved surface is formed on the edge of a groove provided on a hydrodynamic bearing shaft or bearing.
(2)流体軸受用の軸もしくは軸受にエッチング加工に
より所定形状の溝を設け、エッチング処理後、上記軸も
しくは軸受の表面を研磨加工することを特徴とする流体
軸受装置の製造方法。
(2) A method for manufacturing a hydrodynamic bearing device, which comprises etching a groove of a predetermined shape on a hydrodynamic bearing shaft or bearing, and polishing the surface of the shaft or bearing after the etching process.
JP26669184A 1984-12-18 1984-12-18 Fluid bearing device and its production Pending JPS61147885A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP26669184A JPS61147885A (en) 1984-12-18 1984-12-18 Fluid bearing device and its production

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP26669184A JPS61147885A (en) 1984-12-18 1984-12-18 Fluid bearing device and its production

Publications (1)

Publication Number Publication Date
JPS61147885A true JPS61147885A (en) 1986-07-05

Family

ID=17434347

Family Applications (1)

Application Number Title Priority Date Filing Date
JP26669184A Pending JPS61147885A (en) 1984-12-18 1984-12-18 Fluid bearing device and its production

Country Status (1)

Country Link
JP (1) JPS61147885A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53132642A (en) * 1977-04-25 1978-11-18 Nippon Seiko Kk Dynamic pressure type bearing with recess
JPS5712115A (en) * 1980-06-23 1982-01-22 Nippon Seiko Kk Supporting member for spiral group bearing and manufacture thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53132642A (en) * 1977-04-25 1978-11-18 Nippon Seiko Kk Dynamic pressure type bearing with recess
JPS5712115A (en) * 1980-06-23 1982-01-22 Nippon Seiko Kk Supporting member for spiral group bearing and manufacture thereof

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