JPH0199737A - Equipment for working dynamic pressure generating groove - Google Patents
Equipment for working dynamic pressure generating grooveInfo
- Publication number
- JPH0199737A JPH0199737A JP25719087A JP25719087A JPH0199737A JP H0199737 A JPH0199737 A JP H0199737A JP 25719087 A JP25719087 A JP 25719087A JP 25719087 A JP25719087 A JP 25719087A JP H0199737 A JPH0199737 A JP H0199737A
- Authority
- JP
- Japan
- Prior art keywords
- dynamic pressure
- groove
- ball
- pressure generating
- ring
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H7/00—Making articles not provided for in the preceding groups, e.g. agricultural tools, dinner forks, knives, spoons
- B21H7/18—Making articles not provided for in the preceding groups, e.g. agricultural tools, dinner forks, knives, spoons grooved pins; Rolling grooves, e.g. oil grooves, in articles
- B21H7/182—Rolling annular grooves
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Agronomy & Crop Science (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
- Sliding-Contact Bearings (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は動圧軸受のスリーブの内面に動圧発生用溝を
加工するための加工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 a processing device for processing hydrodynamic grooves on the inner surface of a sleeve of a hydrodynamic bearing.
動圧発生用溝の加工装置としては、切削加工により動圧
発生用溝を加工する装置、硬質材からなるボールを用い
た層性加工により動作発生用溝を加工する装置等がある
が、切削加工により加工する装置によって動圧発生用溝
を加工したときには動圧発生用溝の深さのバラツ中が大
きく、また動圧発生用溝の面粗さが良くないため、動圧
軸受の回転精度が悪くなり、しかも加工能率が悪いので
多量生産には不向きであるから、ボールを用いた層性加
工により動圧発生用溝を加工する装置が多く用いられて
いる。Examples of processing equipment for dynamic pressure generation grooves include equipment that processes dynamic pressure generation grooves by cutting, and equipment that processes movement generation grooves by layered processing using balls made of hard material. When the hydrodynamic groove is machined using a processing device, there is a large variation in the depth of the hydrodynamic groove, and the surface roughness of the hydrodynamic groove is not good, so the rotation accuracy of the hydrodynamic bearing is affected. Since this method is not suitable for mass production due to poor processing efficiency and poor processing efficiency, many devices are used that process dynamic pressure generating grooves by layered processing using balls.
従来、ボールを用いたＷＩ性加工により動圧発生用溝を
加工する装置においては、特開昭６１−６４２６号公報
に示されるように、ガイドピンの外周に放射状に複数個
のガイド穴を配置し、ガイド穴内に硬質材からなるボー
ルを圧入して、ボールを保持し【いる。Conventionally, in a device for machining a dynamic pressure generating groove by WI machining using a ball, a plurality of guide holes are arranged radially around the outer circumference of a guide pin, as shown in Japanese Patent Application Laid-Open No. 61-6426. Then, a ball made of hard material is press-fitted into the guide hole to hold the ball.
この動圧発生用溝の加工装置においては、ガイドピンを
回転しながら、ボールな動圧軸受のスリーブ内に挿入す
れば、スリーブの内面に動圧発生用穴を加工することが
できる。In this dynamic pressure generating groove machining device, by rotating the guide pin and inserting it into the sleeve of the ball dynamic pressure bearing, it is possible to machine the dynamic pressure generating hole in the inner surface of the sleeve.
しかし、このような動圧発生用溝の加工装置においては
１円周面に小径のガイド穴を設ける必要があるから、ガ
イド穴のピッチ精度、ガイド穴の穴径精度を高くするこ
とは困難である。そして、ガイド穴が小さいと、ガイド
穴内にボールを圧入したときに、ボールの変形量が大き
くなり、ボールの真円度が狂うので、動圧発生用溝の深
さや幅にバラツキが生ずるから、動圧発生用溝を高精度
に加工することができず、一方ガイド穴が大きいと、ボ
ールがガイド穴内から脱落しやすいので、加工作業が面
倒である。However, in this kind of dynamic pressure generation groove processing equipment, it is necessary to provide small diameter guide holes on one circumferential surface, so it is difficult to improve the pitch accuracy and diameter accuracy of the guide holes. be. If the guide hole is small, when the ball is press-fitted into the guide hole, the amount of deformation of the ball will be large and the ball will be out of roundness, causing variations in the depth and width of the hydrodynamic groove. The dynamic pressure generating groove cannot be machined with high precision, and on the other hand, if the guide hole is large, the ball is likely to fall out of the guide hole, making the machining work troublesome.
この発明は上述の問題点を解決するためになされたもの
で、動圧発生用溝を高精度に加工することができ、加工
作業が容易である動圧発生用溝の加工装置を提供するこ
とを目的とする。The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a processing device for a dynamic pressure generating groove that can process a dynamic pressure generating groove with high precision and that facilitates the machining operation. With the goal.
この目的を達成するため、この発明においては硬質材か
らなるボールを用いて動圧軸受のスリーブの内面に動圧
発生用溝を塑性加工する動圧発生用溝の加工装置におい
て、ガイドピンの軸部に中心部が外周部より薄肉の第１
、第２のリングを対向して固定し、上記第１、第２のリ
ングのうちの少なくとも一方に放射状の保持溝を設け、
上記第１、第２のリングの間に上記ボールを設ける。In order to achieve this object, the present invention provides a hydrodynamic groove processing device for plastically forming a hydrodynamic groove on the inner surface of a sleeve of a hydrodynamic bearing using balls made of a hard material. The center part is thinner than the outer part.
, second rings are fixed facing each other, and at least one of the first and second rings is provided with a radial holding groove;
The ball is provided between the first and second rings.
この動圧発生用溝の加工装置においては、ガイドピンの
軸部に中心部が外周部より薄肉の第１、第２のリングを
対向して固定し、第１、第２のリングの間にボールを設
けているから、ボールが第１、第２のリングにより軸部
に押し付けられるので、ボールが径方向に精度良く配置
され、またボールがガイドピンから脱落することがない
。しかも、第１、第２のリングのうちの少なくとも一方
に放射状の保持溝を設けているから、ボールが保持溝内
に位置するので、ボールが周方向に精度良く配置される
。In this dynamic pressure generating groove machining device, first and second rings, whose center portion is thinner than the outer peripheral portion, are fixed facing each other to the shaft portion of the guide pin, and between the first and second rings, Since the ball is provided, the ball is pressed against the shaft part by the first and second rings, so the ball is arranged with high accuracy in the radial direction, and the ball does not fall off the guide pin. Moreover, since the radial holding groove is provided in at least one of the first and second rings, the balls are located within the holding groove, so that the balls are arranged with high accuracy in the circumferential direction.
第１図はこの発明に係る動圧発生用溝の加工装置により
動圧軸受のスリーブの内面に動圧発生用溝を加工してい
る状態を示す図である。図において、３は動圧軸受のス
リーブ、４はスリーブ３の内面に加工された動圧発生用
溝、１は硬質材からなるガイドピン、２はガイドピン１
の軸部、８は軸部２に設けられた第１のリングで、リン
グ８は中心部が外周部より薄肉で、リング８は接着剤９
によりガイドピン１に固着されている。７はリング８に
放射状に設けられた保持溝で、保持溝７の数はスリーブ
３の内面に加工される動圧発生用溝４０本数と同数であ
り、保持溝７のピッチは高精度に加工されている。１３
は駆動装置！ｉ（図示せず）に取り付けられたシャフト
、１２はシャフト１５に設けられた圧入穴で、圧入穴１
２の径は軸部２の直径より圧入代だけ小さく、圧入穴１
２に軸部２が圧入されている。１１は軸部２に設けられ
た第２のリングで、リング１１は中心部が外周部より薄
肉で、リング１１は接着剤１４によりシャフト１５に固
着されており、リング８とリング１１とは対向して設け
られている。６はリング８とリング１１との間に設けら
れたボールである。なお、軸部２の直径は動圧発生用溝
４の底部間の距離りからボール６の直径の２倍を減算し
た値に設定されている。FIG. 1 is a diagram showing a state in which a dynamic pressure generating groove is being machined on the inner surface of a sleeve of a dynamic pressure bearing by a dynamic pressure generating groove machining apparatus according to the present invention. In the figure, 3 is a sleeve of a dynamic pressure bearing, 4 is a groove for generating dynamic pressure machined on the inner surface of the sleeve 3, 1 is a guide pin made of a hard material, and 2 is a guide pin 1
8 is a first ring provided on the shaft portion 2, the center portion of the ring 8 is thinner than the outer peripheral portion, and the ring 8 is coated with an adhesive 9.
It is fixed to the guide pin 1 by. 7 is a holding groove provided radially on the ring 8, the number of holding grooves 7 is the same as the number of 40 dynamic pressure generation grooves machined on the inner surface of the sleeve 3, and the pitch of the holding groove 7 is machined with high precision. has been done. 13
is a driving device! i (not shown), 12 is a press-fit hole provided in the shaft 15, press-fit hole 1
The diameter of 2 is smaller than the diameter of the shaft part 2 by the press-fitting allowance, and the diameter of the press-fitting hole 1
The shaft portion 2 is press-fitted into 2. Reference numeral 11 designates a second ring provided on the shaft portion 2. The center portion of the ring 11 is thinner than the outer peripheral portion, and the ring 11 is fixed to the shaft 15 with an adhesive 14. It is provided. 6 is a ball provided between ring 8 and ring 11. The diameter of the shaft portion 2 is set to a value obtained by subtracting twice the diameter of the ball 6 from the distance between the bottoms of the dynamic pressure generating grooves 4.
この動圧発生用溝の加工装置においては、駆動装置によ
りシャフト１３を回転しながら、ボール６をスリーブ３
内に挿入すると、ボール６によってスリーブ３の内面が
塑性変形し、動圧発生用溝４が加工される。そして、軸
部２に中心部が外周部より薄肉のリング８．１１を対向
して固定し、ボール６をリング８．１１０間に設けてい
るから、ボール６がリング８．１１により軸部２に押し
付けられるので、ボール６が径方向に精度良く配置され
、またボール６の真円度が狂うことはなく、しかもリン
グ８に放射状の保持溝７を設けているから、ボール６が
保持溝７内に位置するので、ボール６が周方向に精度良
く配置される。したがって、動圧発生用溝４の深さや幅
にバラツキが生ずることはないため、動圧発生用溝４を
高精度に加工することができる。また、軸部２にリング
８．１１を対向して固定し、ボール６をリング８．１１
の間にボール６を設けているから、ボール６がガイドピ
ン１から脱落することがないので、加工作業が容易であ
る。In this dynamic pressure generation groove machining device, the ball 6 is moved into the sleeve 3 while the shaft 13 is rotated by the drive device.
When inserted into the sleeve 3, the inner surface of the sleeve 3 is plastically deformed by the balls 6, and the dynamic pressure generating groove 4 is formed. Then, a ring 8.11 whose center portion is thinner than the outer peripheral portion is fixed to the shaft portion 2 facing each other, and the ball 6 is provided between the rings 8.110. Since the balls 6 are pressed against each other, the balls 6 are arranged with high precision in the radial direction, and the roundness of the balls 6 does not go out of order.Furthermore, since the ring 8 is provided with radial holding grooves 7, the balls 6 are placed in the holding grooves 7. Since the balls 6 are located inside, the balls 6 are precisely arranged in the circumferential direction. Therefore, since there is no variation in the depth or width of the dynamic pressure generating groove 4, the dynamic pressure generating groove 4 can be processed with high precision. Also, a ring 8.11 is fixed to the shaft portion 2 facing each other, and the ball 6 is fixed to the ring 8.11.
Since the ball 6 is provided between the guide pins 1 and 1, the ball 6 will not fall off the guide pin 1, making the machining work easier.
第２図はこの発明に係る他の動圧発生用溝の加工装置の
一部を示す図である。この動圧発生用溝の加工装置にお
いては、ボール６の側部１０を研削加工によって削除し
ているので、軸部２の径に対してボール６の径が大きい
場合、あるいはボール６の数が多い場合にも、隣接する
ボール６が互いに干渉するのを防止することができる。FIG. 2 is a diagram showing a part of another dynamic pressure generating groove processing apparatus according to the present invention. In this dynamic pressure generation groove processing device, the side portion 10 of the ball 6 is removed by grinding, so if the diameter of the ball 6 is larger than the diameter of the shaft portion 2 or the number of balls 6 is Even if there are many balls, it is possible to prevent adjacent balls 6 from interfering with each other.
なお、上述実施例においては、リング８に保持溝７を設
けたが、リング１１に保持溝を設けてもよく、またリン
グ８およびリング１１に保持溝を設けてもよい。In the above embodiment, the ring 8 is provided with the holding groove 7, but the ring 11 may be provided with the holding groove, or the ring 8 and the ring 11 may be provided with the holding groove.
以上説明したように、この発明に係る動圧発生用溝の加
工装置においては、ボールが径方向および周方向に精度
良く配置され、しかもボールの真円度が狂うことはない
から、動圧発生用溝を高精度に加工することができるの
で、動圧軸受の回転精度が向上する。また、ボールがガ
イドピンから脱落することがないので、加工作業が容易
である。As explained above, in the dynamic pressure generation groove processing device according to the present invention, the balls are arranged with high accuracy in the radial direction and the circumferential direction, and the roundness of the balls does not go out of order. Since the groove can be machined with high precision, the rotational precision of the hydrodynamic bearing is improved. Further, since the ball does not fall off the guide pin, machining work is easy.
このように、この発明の効果は顕著である。As described above, the effects of this invention are remarkable.
第１図はこの発明に係る動圧発生用溝の加工装置により
動圧軸受のスリーブの内面に動圧発生用溝を加工してい
る状態を示す図、第２図はこの発明に係る他の動圧発生
用溝の加工装置の一部を示す図である。
１・・・・・・・・・・・・・・・・・・ガイドピン２
・・・・・・・・・・・・・−・・・・軸部５・・−・
・・・・・・・・・・・・・スリーブ４・・・・・・・
・・・・・・・・・・・動圧発生用溝６・・−・・・・
・・・・・・・・・・ボール７・−・・・・・・・・・
・−・・保持溝８．１１・・・・・・・・・第１、第２
のリング代理人 弁理士 小 川 勝 男FIG. 1 is a diagram showing a state in which a dynamic pressure generating groove is being machined on the inner surface of a sleeve of a dynamic pressure bearing by a dynamic pressure generating groove machining device according to the present invention, and FIG. FIG. 2 is a diagram showing a part of a processing device for a groove for generating dynamic pressure. １・・・・・・・・・・・・・・・・・・Guide pin 2
・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
・・・・・・・・・・・・・Sleeve 4・・・・・・・
・・・・・・・・・・Dynamic pressure generation groove 6・・・・・・・・・・・・
・・・・・・・・・Ball 7・－・・・・・・・・・
・・・Retaining groove 8.11・・・・・・・First, second
Ring Agent Patent Attorney Katsuo Ogawa
Claims (1)
の内面に動圧発生用溝を塑性加工する動圧発生用溝の加
工装置において、ガイドピンの軸部に中心部が外周部よ
り薄肉の第１、第２のリングを対向して固定し、上記第
１、第２のリングのうちの少なくとも一方に放射状の保
持溝を設け、上記第１、第２のリングの間に上記ボール
を設けたことを特徴とする動圧発生用溝の加工装置。1. In a dynamic pressure generation groove processing device that plastically processes a dynamic pressure generation groove on the inner surface of a sleeve of a hydrodynamic bearing using balls made of hard material, the center part of the guide pin shaft is thinner than the outer peripheral part. a first and a second ring are fixed facing each other, a radial holding groove is provided in at least one of the first and second rings, and the ball is placed between the first and second rings. A processing device for a groove for generating dynamic pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25719087A JPH0199737A (en) | 1987-10-14 | 1987-10-14 | Equipment for working dynamic pressure generating groove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25719087A JPH0199737A (en) | 1987-10-14 | 1987-10-14 | Equipment for working dynamic pressure generating groove |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0199737A true JPH0199737A (en) | 1989-04-18 |
Family
ID=17302929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25719087A Pending JPH0199737A (en) | 1987-10-14 | 1987-10-14 | Equipment for working dynamic pressure generating groove |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0199737A (en) |
-
1987
- 1987-10-14 JP JP25719087A patent/JPH0199737A/en active Pending
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