JPS63272463A - Tool for smoothing work - Google Patents
Tool for smoothing workInfo
- Publication number
- JPS63272463A JPS63272463A JP10420887A JP10420887A JPS63272463A JP S63272463 A JPS63272463 A JP S63272463A JP 10420887 A JP10420887 A JP 10420887A JP 10420887 A JP10420887 A JP 10420887A JP S63272463 A JPS63272463 A JP S63272463A
- Authority
- JP
- Japan
- Prior art keywords
- tool
- hole
- diameter
- spherical
- cylindrical
- 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
- 238000009499 grossing Methods 0.000 title claims description 11
- 238000000034 method Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 238000003754 machining Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 239000012530 fluid Substances 0.000 description 4
- 238000007373 indentation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、加工された穴の内面に形成された微小な盛り
上り部に塑性変形を与えることによって穴内面を平滑加
工する工具に関し、特に流体軸受内面の溝加工によって
生ずる溝周辺の盛り上り部を、特定形状の工具を回転し
押し込むことによって、上記軸受の内面を高精度に平滑
化する工具に関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a tool for smoothing the inner surface of a hole by applying plastic deformation to a minute bulge formed on the inner surface of the hole. The present invention relates to a tool for highly accurately smoothing the inner surface of a hydrodynamic bearing by rotating and pushing a tool of a specific shape into the raised portion around the groove that is generated by groove machining on the inner surface of the fluid bearing.
従来、加工された穴内面の、加工歪などによって生じる
微小な盛り上り部を除去する方法として、砥石による研
削やリーマによる切削法が知られているが、穴内面の仕
上面の粗さが良くない。これに対して、例えば、スギツ
マシン社カタログナンバー５５１４Ｎの第３頁から第４
頁に掲載されているように、スバロールによって穴の内
面に形成されている凸凹面の凸部なローラで転圧し、凹
部に押しならす、いわゆる塑性加工によって穴内面を平
滑にするスギノスパロールが紹介されている。Conventionally, grinding with a whetstone and cutting with a reamer have been known as methods for removing minute bulges on the inner surface of a machined hole that occur due to machining distortion, etc., but these methods do not produce a rough finished surface on the inner surface of the hole. do not have. On the other hand, for example, pages 3 to 4 of Sugitsu Machine Co., Ltd. catalog number 5514N
As shown on the page, we are introducing Sugino Super Roll, which smooths the inner surface of the hole by rolling it with a roller with a convex surface formed on the inner surface of the hole by Suba Roll and pushing it into the concave part, so-called plastic working. has been done.
上記従来技術による穴内面の平滑化工具では。 In the above-mentioned prior art tool for smoothing the inner surface of a hole.
ローラ状の工具を回転させながら押し込み塑性加工的に
盛り上り部（凸部）を押し潰す加工法であるため、仕上
面の平滑性が良く、かつ仕上げ加工時間が短く、しかも
工具寿命が長いという長所がある。しかし、穴内面に加
工された溝の形状およびその加工歪によって生ずる盛り
上り部の形状が穴の軸線方向に一致する場合には、複数
設けられている小径のローラ状の工具が溝部分に嵌まり
込むため、溝の両端部に形成された盛り上り部を押し潰
すことができなくなり、高精度に穴内面の平滑加工がで
きないという問題があった。以下に。This processing method crushes the bulges (protrusions) using indentation plastic processing while rotating a roller-shaped tool, resulting in a smooth finished surface, short finishing time, and long tool life. It has its advantages. However, if the shape of the groove machined on the inner surface of the hole and the shape of the raised part caused by machining distortion match the axial direction of the hole, multiple small-diameter roller-shaped tools are fitted into the groove. Because of this, it becomes impossible to crush the raised portions formed at both ends of the groove, resulting in a problem in that the inner surface of the hole cannot be smoothed with high accuracy. less than.
この問題を図に基づいて説明する。例えば、第４図は内
径寸法りなる穴の内面に、ボールを押し付けて溝２．５
，４．５を形成させた流体軸受の本体１の平面図であっ
て、溝の形状は、第５図の上記流体軸受の縦断面図に示
すごとく、流体軸受の軸線方向に一致する溝部分２′が
形成される。そして、溝２．６．４．５は、いずれも断
面が円弧状の溝であって、これらの溝２．３，４．５の
両端部には盛り上り部６．７が溝の加工時に生じる。This problem will be explained based on the diagram. For example, Fig. 4 shows a groove 2.5 in which a ball is pressed against the inner surface of a hole with the inner diameter dimension.
. 2' is formed. Grooves 2.6.4.5 are all arcuate grooves in cross section, and raised portions 6.7 are formed at both ends of these grooves 2.3 and 4.5 during machining of the grooves. arise.
なお、溝には流体軸受の本体１の上端と下端とに、流体
軸受の本体１の軸線に対し溝の傾斜部分８．９が設けら
れている。この流体軸受の溝２．３．４．５の両端部に
形成された加工歪である盛り上り部６．７を除去し平滑
化する加工法として、第６図に示すごとく、工具本体１
０の周囲に小型のローラ１１を複数個配設したローラ状
工具を用い、これを回転させながら流体軸受の穴の内部
に押し込み、盛り上り部６．７を転圧し、穴の内面を平
滑化させることができる。この場合、ローラ状工具の外
径は、流体軸受の穴の内径寸法りよりも少し大きい目に
設定されているため、第７図に示すごとく、ローラ状工
具１０の回転に伴って複数個のローラ１１も回転し、溝
の両端部に形成されている盛り上り部６．７が押し潰さ
れることになる。Incidentally, the groove is provided at the upper and lower ends of the main body 1 of the hydrodynamic bearing with inclined portions 8.9 of the groove with respect to the axis of the main body 1 of the hydrodynamic bearing. As a machining method for removing and smoothing the raised portions 6.7 which are machining distortions formed at both ends of the grooves 2.3.4.5 of this hydrodynamic bearing, as shown in FIG.
Using a roller-shaped tool with a plurality of small rollers 11 arranged around 0, push it into the hole of the fluid bearing while rotating it, compact the raised part 6.7, and smooth the inner surface of the hole. can be done. In this case, the outer diameter of the roller-shaped tool is set to be slightly larger than the inner diameter of the hole in the hydrodynamic bearing, so as the roller-shaped tool 10 rotates, a plurality of The roller 11 also rotates, and the raised portions 6.7 formed at both ends of the groove are crushed.
しかしながら、第５図に示すごとく、穴の軸線方向に一
致する部分の溝の両端部に形成された盛り・ ５
上り部６．７は、ローラ状工具１０のローラ１１が溝２
′部分圧入り込んでしまうために、盛り上り部６．７に
転圧が加わらず、この位置の盛り上り部６．７は押し潰
されにくくなり、穴の内面を平滑化することができな（
なる。However, as shown in FIG.
'Because it is partially pressed in, rolling pressure is not applied to the raised part 6.7, and the raised part 6.7 at this position becomes difficult to be crushed, making it impossible to smooth the inner surface of the hole (
Become.
本発明の目的は、流体軸受などの穴の内面に形成される
溝形状が、穴の軸線方向と一致するような溝が形成され
た場合においても、溝の両端部などに生ずる加工歪であ
る盛り上り部分を、確実にしかも容易に押し潰し、穴の
内面を極めて平滑にする工具を提供することにある。The purpose of the present invention is to prevent processing distortion that occurs at both ends of the groove even when the groove shape is formed on the inner surface of a hole such as a hydrodynamic bearing and the groove is aligned with the axial direction of the hole. To provide a tool that reliably and easily crushes a raised part and makes the inner surface of a hole extremely smooth.
上記本発明の目的は、流体軸受などの被加工物体の穴の
内径寸法よりも、穴内面の盛り上り部を平滑加工するだ
け大きい外径寸法を有する球形状の工具、もしくは先端
部が穴の内径よりも小さいテーパ部を有する円柱形状の
工具を用い、これを穴の軸方向に回転させながら押し込
み塑性加工を施すことにより、達成される。The object of the present invention is to provide a spherical tool having an outer diameter that is larger than the inner diameter of a hole in a workpiece such as a hydrodynamic bearing so as to smooth the raised part on the inner surface of the hole, or a tool whose tip is This is achieved by using a cylindrical tool having a tapered portion smaller than the inner diameter and performing indentation plastic working while rotating the tool in the axial direction of the hole.
・ ４ ・
被加工物体の穴の内径寸法よりも、所定の寸法、すなわ
ち穴内面の盛り上り部を平滑加工するだけ大きい外径寸
法を有する球形状もしくは先端部が穴の内径よりも小さ
いテーパ部を有する円柱形状の工具を用い、これを穴の
軸線方向に回転させたがら押し込むと、穴内面の盛り上
り部は１球形状もしくは先端部にテーパ部を設けた円柱
形状の工具の外径部位によって押し潰される。また、本
発明の工具は、その外径部位全周にわたって穴の内径寸
法よりも大きい外径寸法を有しているから、穴の内面に
、その軸方向に加工された溝が形成されていても、工具
の溝の中に入り込む問題は全く生じない。したがって、
溝などの加工によって生じた大内面の盛り上り部は、本
発明の工具の外径部位によって押し潰され、塑性加工的
に極めて平滑な穴の内面が形成される。4. A spherical shape with an outer diameter that is larger than the inner diameter of the hole in the workpiece by a predetermined dimension, that is, an outer diameter that is large enough to smooth the bulge on the inner surface of the hole, or a tapered part whose tip is smaller than the inner diameter of the hole. Using a cylindrical tool with crushed. Further, since the tool of the present invention has an outer diameter larger than the inner diameter of the hole over the entire outer circumference of the tool, a groove machined in the axial direction is formed on the inner surface of the hole. However, there is no problem of the tool getting into the groove. therefore,
The raised portion of the large inner surface caused by machining the groove etc. is crushed by the outer diameter portion of the tool of the present invention, and an extremely smooth inner surface of the hole is formed by plastic working.
以下に本発明の一実施例を挙げ、図面に基づいてさらに
詳細に説明する。なお１図において同じ符号を用いたも
のは同一部品もしくは同一機能を “有する部分
である。An embodiment of the present invention will be described below in more detail based on the drawings. In Figure 1, parts using the same reference numerals are the same parts or have the same function.
第１図は、工具軸１２の先端にボール形状部１３を有す
る球形状の工具を示す。外径寸法がｄなるボール形状部
１３は工具軸１２に溶接するか、または工具軸１２と同
一部材から削りだして作製する。FIG. 1 shows a spherical tool having a ball-shaped portion 13 at the tip of a tool shaft 12. As shown in FIG. The ball-shaped portion 13 having an outer diameter of d is manufactured by welding to the tool shaft 12 or by machining it from the same material as the tool shaft 12.
第２図は、工具軸１５の先端部にテーパ部１８および１
７を有し、このテーバ部１８と１７との間の中間部に外
径寸法がｄなる円柱形状部１６を持つ円柱形状の工具で
ある。なお、テーパ部１８の先端部１９の外径寸法は穴
径寸法りより小さく決めである。また、球形状工具のボ
ール形状部１３の外径寸法ｄおよび円柱形状部１６の外
径寸法ｄは、いずれも流体軸受の穴径寸法りよりも所定
の寸法だけ大きくしである。FIG. 2 shows a tapered portion 18 and a 1
It is a cylindrical tool having a cylindrical portion 16 having an outer diameter of d at an intermediate portion between the tapered portions 18 and 17. The outer diameter of the tip 19 of the tapered portion 18 is set to be smaller than the hole diameter. Further, the outer diameter dimension d of the ball-shaped portion 13 of the spherical tool and the outer diameter dimension d of the cylindrical portion 16 are both larger than the hole diameter dimension of the fluid bearing by a predetermined dimension.
以上に示した球形状もしくは円柱形状の工具を、流体軸
受の本体１の穴の中に矢印２０に示す方向に回転しなが
ら押し込み、所定の深さまで達した後、矢印２１に示す
方向に工具を持ち上げることにより、穴内面の盛り上り
部は工具のボール形状部１３の外径部位ないしは円柱形
状部１６の外径部位により押し潰され穴内面が平滑化さ
れる。The spherical or cylindrical tool shown above is pushed into the hole of the main body 1 of the hydrodynamic bearing while rotating in the direction shown by the arrow 20, and after reaching a predetermined depth, the tool is pushed in the direction shown by the arrow 21. By lifting, the raised portion on the inner surface of the hole is crushed by the outer diameter portion of the ball-shaped portion 13 or the outer diameter portion of the cylindrical portion 16 of the tool, and the inner surface of the hole is smoothed.
上記の球形状もしくは円柱形状の工具を用い。Use the spherical or cylindrical tool mentioned above.
材質が黄銅で、穴の内径寸法りが５ｍ＋、溝の深さが７
μｍの場合の盛り上り量（高さ）５μｍの穴を有する流
体軸受を、工具の材質をＷ、Ｇｏを主成分とする超硬質
合金として、盛り上り量を除去した結果を第３図に示す
。The material is brass, the inner diameter of the hole is 5m+, and the depth of the groove is 7.
Fig. 3 shows the result of removing the protrusion amount by using a hydrodynamic bearing with a hole with a protrusion height (height) of 5 μm and using a superhard alloy whose main components are W and Go as the tool material. .
図において、δは工具の外径寸法ｄから流体軸受の穴の
内径寸法りを差し引き、それを２で割った値であり、こ
の値は工具による押し潰し量に相当する。第３図から明
らかなごとく、δを１μｍ以上（１〜３μｍ程度）とし
た本発明の工具によって、盛り上り量は１μｍ以内に平
滑化できることを示している。なお、盛り上り部を第１
図および第２図に示した工具によって押し潰し平滑化し
ても、形成した溝の深さは変化しなかった。In the figure, δ is a value obtained by subtracting the inner diameter of the hole of the hydrodynamic bearing from the outer diameter d of the tool and dividing it by 2, and this value corresponds to the amount of crushing by the tool. As is clear from FIG. 3, the tool of the present invention in which δ is 1 μm or more (approximately 1 to 3 μm) shows that the amount of bulge can be smoothed to within 1 μm. Note that the raised part is the first
Even when the grooves were crushed and smoothed using the tool shown in the figure and FIG. 2, the depth of the grooves formed did not change.
以上詳細に説明したごとく１本発明による球形状の工具
もしくは先端部にテーパ部を有する円柱形状の工具を用
いて、流体軸受などの穴の内面の溝加工などによって生
じた盛り上り部などの平滑化を行うと、たとえ穴の軸線
方向に一致するような溝まわりの盛り上り部を有する穴
であっても、確実にしかも精度よく穴内面を平滑化する
ことができる。しかも、本発明の工具は構造が極めて簡
単であり、従来の複数のローラな用いたローラ状工具に
比べて製作費が一段と安く、また平滑化するための加工
操作は１本発明の工具を穴の軸方向への押し込みと引き
抜きを繰り返すだけでよく。As explained in detail above, the spherical tool or the cylindrical tool having a tapered tip according to the present invention can be used to smooth the protrusions, etc. caused by grooving the inner surface of a hole in a fluid bearing, etc. By performing this process, even if the hole has a raised portion around the groove that coincides with the axial direction of the hole, the inner surface of the hole can be reliably and accurately smoothed. Moreover, the tool of the present invention has an extremely simple structure and is much cheaper to manufacture than conventional roller-shaped tools that use multiple rollers. Just repeat pushing in and pulling out in the axial direction.
極めて短時間に平滑加工を完了させることができ。Smoothing can be completed in an extremely short time.
量産性に優れている。Excellent for mass production.
第１図は実施例において用いた球形状工具の構造を示す
模式図、第２図は実施例において用いた先端部にテーパ
部を有する円柱形状工具の構造を示す模式図、第３図は
実施例における穴内面の盛り上り量と工具による押し潰
し量との関係を示すグラフ、第４図は流体軸受の穴内面
の溝形状を示す平面図、第５図は第４図に示した流体軸
受の縦断面図、第６図は従来の工具による流体軸受の穴
・ ８ ・
内面の平滑加工状態を示す模式図、第７図は第６図に示
した平滑加工状態の横断面図である。
１・・・流体軸受の本体 ２・・・溝２′・・・軸線
方向に一致する溝部分
３．４．５・・・溝 ６．７・・・盛り上り部８
．９・・・溝の傾斜部分 １０・・・ローラ状工具１１
・・・口・・・ラ １２・・・工具軸１３・・
・ボール形状部 １５・・・工具軸１６・・・円柱形
状部 １７．１８−・・テーパ部１９・・・テーバ
先端部 ２０・・・押し込み方向２１・・・引き抜き
方向Fig. 1 is a schematic diagram showing the structure of the spherical tool used in the example, Fig. 2 is a schematic diagram showing the structure of the cylindrical tool having a tapered tip at the tip used in the example, and Fig. 3 is a schematic diagram showing the structure of the cylindrical tool used in the example. A graph showing the relationship between the amount of swelling on the inner surface of the hole and the amount of crushing by the tool in the example, Fig. 4 is a plan view showing the groove shape on the inner surface of the hole of the hydrodynamic bearing, and Fig. 5 is the hydrodynamic bearing shown in Fig. 4. FIG. 6 is a schematic diagram showing a state in which the inner surface of a hole of a hydrodynamic bearing is smoothed using a conventional tool, and FIG. 7 is a cross-sectional view of the state in which the inner surface of the hole shown in FIG. 6 is smoothed. 1... Main body of the hydrodynamic bearing 2... Groove 2'... Groove portion that coincides with the axial direction 3.4.5... Groove 6.7... Raised portion 8
．． 9... Slanted part of the groove 10... Roller-shaped tool 11
...Opening...Ra 12...Tool shaft 13...
・Ball shaped part 15... Tool shaft 16... Cylindrical part 17.18 -... Tapered part 19... Tapered tip part 20... Pushing direction 21... Pulling out direction
Claims (1)
転させながら押し込み、上記穴の内面に形成されている
盛り上り部に塑性変形を与えて、該穴の内面を平滑加工
する工具において、上記工具の平滑加工部は硬質部材よ
りなり、かつ工具の平滑加工部の形状が球形状、もしく
は先端部が上記穴の内径よりも小さいテーパ部を有する
円柱形状であって、上記工具の球形状もしくは円柱形状
の外径寸法を、上記加工する穴の内径寸法よりも、上記
穴の内面の盛り上り部に塑性変形を与えて穴内面を平滑
加工するだけ大きくしたことを特徴とする穴内面の平滑
加工用工具。 ２、被加工物体が流体軸受であり、工具の平滑加工部の
外径寸法が、流体軸受の内径寸法よりも１〜３μｍ大き
いことを特徴とする特許請求の範囲第１項に記載の平滑
加工用工具。[Claims] 1. Push the tool into a hole provided in the workpiece while rotating it, give plastic deformation to the raised part formed on the inner surface of the hole, and In a tool for smoothing the inner surface, the smoothing part of the tool is made of a hard material, and the shape of the smoothing part of the tool is spherical or cylindrical with a tip having a tapered part smaller than the inner diameter of the hole. Therefore, the outer diameter of the spherical or cylindrical shape of the tool is made larger than the inner diameter of the hole to be machined by applying plastic deformation to the raised part of the inner surface of the hole to smooth the inner surface of the hole. A tool for smoothing the inner surface of a hole. 2. The smoothing process according to claim 1, wherein the workpiece is a hydrodynamic bearing, and the outer diameter of the smoothed part of the tool is 1 to 3 μm larger than the inner diameter of the hydrodynamic bearing. tools.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10420887A JPS63272463A (en) | 1987-04-30 | 1987-04-30 | Tool for smoothing work |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10420887A JPS63272463A (en) | 1987-04-30 | 1987-04-30 | Tool for smoothing work |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63272463A true JPS63272463A (en) | 1988-11-09 |
Family
ID=14374552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10420887A Pending JPS63272463A (en) | 1987-04-30 | 1987-04-30 | Tool for smoothing work |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63272463A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS642862A (en) * | 1987-06-23 | 1989-01-06 | Nippon Seiko Kk | Machining method for dynamic pressure generating groove |
| JPH04348865A (en) * | 1991-05-24 | 1992-12-03 | Matsushita Electric Ind Co Ltd | Method for manufacturing sleeve bearing |
| EP1095727A3 (en) * | 1999-10-27 | 2003-03-19 | Minebea Co., Ltd. | Method of finishing the land of the outer ring of a bearing and a bearing |
| JP2008138872A (en) * | 2006-11-06 | 2008-06-19 | Ｇａｓｔ Ｊａｐａｎ 株式会社 | Bearing manufacturing method, bearing unit, rotary equipment, and sliding member manufacturing method |
| JP2015226971A (en) * | 2014-06-03 | 2015-12-17 | 三菱電機株式会社 | Groove finish machining method and device |
| JP2020171972A (en) * | 2019-04-08 | 2020-10-22 | 中川特殊鋼株式会社 | Burnishing device and burnishing method |
-
1987
- 1987-04-30 JP JP10420887A patent/JPS63272463A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS642862A (en) * | 1987-06-23 | 1989-01-06 | Nippon Seiko Kk | Machining method for dynamic pressure generating groove |
| JPH04348865A (en) * | 1991-05-24 | 1992-12-03 | Matsushita Electric Ind Co Ltd | Method for manufacturing sleeve bearing |
| EP1095727A3 (en) * | 1999-10-27 | 2003-03-19 | Minebea Co., Ltd. | Method of finishing the land of the outer ring of a bearing and a bearing |
| JP2008138872A (en) * | 2006-11-06 | 2008-06-19 | Ｇａｓｔ Ｊａｐａｎ 株式会社 | Bearing manufacturing method, bearing unit, rotary equipment, and sliding member manufacturing method |
| JP4680973B2 (en) * | 2006-11-06 | 2011-05-11 | Ｇａｓｔ Ｊａｐａｎ 株式会社 | Manufacturing method of bearing, bearing unit, rotating device, and manufacturing method of sliding member |
| JP2015226971A (en) * | 2014-06-03 | 2015-12-17 | 三菱電機株式会社 | Groove finish machining method and device |
| JP2020171972A (en) * | 2019-04-08 | 2020-10-22 | 中川特殊鋼株式会社 | Burnishing device and burnishing method |
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