JPS60213331A - Production of valve sleeve - Google Patents
Production of valve sleeveInfo
- Publication number
- JPS60213331A JPS60213331A JP6831384A JP6831384A JPS60213331A JP S60213331 A JPS60213331 A JP S60213331A JP 6831384 A JP6831384 A JP 6831384A JP 6831384 A JP6831384 A JP 6831384A JP S60213331 A JPS60213331 A JP S60213331A
- Authority
- JP
- Japan
- Prior art keywords
- cylindrical body
- valve sleeve
- manufacturing
- punch
- sleeve according
- 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
Landscapes
- Forging (AREA)
- Valve Housings (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は油圧回転弁を構成する弁スリーブの製進方法に
関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a valve sleeve constituting a hydraulic rotary valve.
例えば、動力舵取装置等に用いられる油圧回転弁は、複
数個の軸方向溝が形成された弁ロータと、この弁ロータ
の外周に回転可能に嵌装され、その内面に弁ロータの溝
の周方向両側に重合しうる軸方向溝を有する弁スリーブ
とから構成され、これら弁ロータと弁スリーブとの相対
回転変位に応じてパワーシリンダへの圧力流体の給排を
制御するものである。そして、この弁スリーブの溝はい
わゆる盲溝すなわち中間部分だけが溝としての凹部が形
成され、両端部は溝が刻設されない部分として残された
ものでなければならない。For example, a hydraulic rotary valve used in a power steering system, etc. has a valve rotor in which a plurality of axial grooves are formed, and the valve rotor is rotatably fitted around the outer circumference of the valve rotor. The valve sleeve has axial grooves that overlap each other on both sides in the circumferential direction, and the supply and discharge of pressurized fluid to and from the power cylinder is controlled in accordance with the relative rotational displacement between the valve rotor and the valve sleeve. The groove of this valve sleeve must be a so-called blind groove, that is, only the middle portion should be formed with a recessed portion as a groove, and both ends should be left as portions where no groove is formed.
このような盲溝を円筒状の弁スリーブ内面に形成する方
法として、特公昭４９−４！１１５４１号公報に示され
たものが従来から知られている。この方法は、所定寸法
のカッタを、円筒素材の内部で円弧運動による前進、後
退を繰り返させることにより一方の溝を刻設し、更に、
円筒素材を同期回転させて複数本の溝を順次形成してい
くものであり、この方法によると、複雑な構造の装置を
必要とし、又、工作時間も長いという欠点があった。As a method of forming such a blind groove on the inner surface of a cylindrical valve sleeve, the method disclosed in Japanese Patent Publication No. 49-4111541 is known. In this method, one groove is carved by moving a cutter of a predetermined size repeatedly forward and backward in an arc inside a cylindrical material, and then
A plurality of grooves are sequentially formed by rotating cylindrical materials synchronously, and this method has the drawbacks of requiring a device with a complicated structure and requiring a long machining time.
本発明は上記欠点に鑑みなされたもので、棒状の素材を
、開口部が拡開された有底筒状体に成形するとともに、
この筒状体の内面に両端部を残して複数の軸方向溝を形
成する第１の工程と、筒状体の拡開された部分を非拡開
部と実質的に同一の口径に圧縮する第２の工程とによっ
て、内面に盲溝を有する弁スリーブを容易に製造するこ
とを可能とした弁スリーブの製造方法を提供するもので
ある。The present invention was made in view of the above-mentioned drawbacks, and involves molding a rod-shaped material into a bottomed cylindrical body with an enlarged opening.
A first step of forming a plurality of axial grooves on the inner surface of the cylindrical body leaving both end portions, and compressing the expanded portion of the cylindrical body to a diameter substantially the same as that of the non-expanded portion. The present invention provides a method for manufacturing a valve sleeve that makes it possible to easily manufacture a valve sleeve having a blind groove on the inner surface by the second step.
以下、図示実施例に基づいて本発明を説明する。先ず、
第１図に示すような丸棒状の素材（１）を機械加工或は
冷間又は温間における鍛造加工等の方法により形成し、
この素材（１）を第２図に示すプレスダイ（２）内に挿
入配置した後、第１のプレス工程によって開口部（３ａ
）が外方へ拡開された有底筒状体（３）に成形すると同
時に、その筒状体（３）の内面に複数の軸方向溝を形成
する （７ＪＪ３図参照）。この工程に用いられるプレ
スダイ（２）は、下方部分（２ａ）が円孔状に、そして
その上部内局面（２ｂ）がテーパ状に形成されている。The present invention will be explained below based on illustrated embodiments. First of all,
A round bar-shaped material (1) as shown in FIG. 1 is formed by a method such as machining or cold or warm forging,
After inserting and arranging this material (1) into the press die (2) shown in Fig. 2, the opening (3a
) is formed into a bottomed cylindrical body (3) that expands outward, and at the same time, a plurality of axial grooves are formed on the inner surface of the cylindrical body (3) (see Figure 7JJ3). The press die (2) used in this step has a lower portion (2a) formed in a circular hole shape and an upper inner curved surface (2b) formed in a tapered shape.
一方、パフ ｆ （４）は、パンチピン（５）とその上
方大径部（５ａ）に嵌装されたパンチスリーブ（６）と
を有しており、パンチピン（５）は第４図及び第５図に
示すように、先端部（５ｂ）が円柱状に形成され、又、
大径部（５ａ）と先端円柱部（５ｂ）の中間が、上記プ
レスダイ（２）のテーパ面（２ｂ）と略等しい傾斜（α
）を有するテーパ部（５Ｃ）となっている。更に、円柱
部（５ｂ）の外周には、円周方向等間隔に６本の突起部
（７）が設けられている。これら突起部（７）は円柱部
（５ｂ）の先端面（５ｄ）よりやや内方の位置から、円
柱部（５ｂ）とテーパ部（５Ｃ）とが連続する部分に至
る迄の長さく文）を有し、かつ、形成される溝の幅と略
等しい幅（Ｗ）を有している。尚、プレスダイ（２）の
底面は、バックダイ（８）及びその中央に配置されたノ
ックアウトビン（９）と支持部材（１０）とによって支
持されている。On the other hand, the puff f (4) has a punch pin (5) and a punch sleeve (6) fitted in the upper large diameter part (5a), and the punch pin (5) is shown in FIGS. 4 and 5. As shown in the figure, the tip (5b) is formed in a cylindrical shape, and
The intermediate part between the large diameter part (5a) and the tip cylindrical part (5b) has an inclination (α
) is the tapered part (5C). Furthermore, six protrusions (7) are provided on the outer periphery of the columnar part (5b) at equal intervals in the circumferential direction. These protrusions (7) extend from a position slightly inward from the tip surface (5d) of the cylindrical part (5b) to the part where the cylindrical part (5b) and the tapered part (5C) are continuous). and has a width (W) substantially equal to the width of the groove to be formed. The bottom surface of the press die (2) is supported by a back die (8), a knockout bin (9) placed at the center thereof, and a support member (10).
以上の構成に係るプレスダイ（２）及びパンチ（４）を
用いて、素材（１）にプレス加工を行なうと、先ず、パ
ンチピン（５）の円柱部（５ｂ）先端面（５ｄ）が素材
（１）の中央部に接した後、更に下降すると、その中央
部が押圧されて次第に凹陥部（３ｂ）が形成され、この
時中央部から押し出された部分はプレスダイ（２）のテ
ーパ面（２ｂ）とパンチピン（５）のテーパ部（５Ｃ）
との間を押し上げられ、開口部（３ａ）が外方へ拡開さ
れた有底筒状体（３）が得られる。素材（１）が円柱部
先端面（５ｄ）に押されて円筒状に成形されていく過程
において、円柱部（５ｂ）に設けられた突起部（７）の
先端（７ａ）が円柱部先端面（５ｄ）よりやや遅れて筒
状体の内面に接触して６条の溝（１１）を形成する。こ
れら突起部（７）は上述したように、円柱部先端面（５
ｄ）よりやや上方からテーパ部（５ｃ）に至る迄の長さ
く見）を有するよう形成されているので、第１の工程で
形成される軸方向溝（１１）は、有底筒状体（３）内面
の軸方向長さよりも短く、両端が封止されたいわゆる盲
溝となる。尚、上記丸棒状素材（１）の高さくｈ）は、
プレス加工時に開口部（３ａ）側が押し上げられる高さ
くΔｈ）を考慮して決定される。When press working is performed on the material (1) using the press die (2) and punch (4) having the above configuration, first, the tip surface (5d) of the cylindrical portion (5b) of the punch pin (5) is pressed against the material (1). ) and then further descends, the central part is pressed and a concave part (3b) is gradually formed, and the part pushed out from the central part at this time is the tapered surface (2b) of the press die (2). and the taper part (5C) of the punch pin (5)
A bottomed cylindrical body (3) with an opening (3a) expanded outward is obtained. During the process in which the material (1) is pressed against the tip surface (5d) of the cylindrical portion and formed into a cylindrical shape, the tip (7a) of the protrusion (7) provided on the cylindrical portion (5b) touches the tip surface of the cylindrical portion (5d). A little later than (5d), it comes into contact with the inner surface of the cylindrical body to form six grooves (11). As mentioned above, these protrusions (7)
The axial groove (11) formed in the first step is formed in the bottomed cylindrical body ( 3) It is shorter than the axial length of the inner surface and becomes a so-called blind groove with both ends sealed. In addition, the height h) of the above-mentioned round bar-shaped material (1) is:
It is determined in consideration of the height Δh) at which the opening (3a) side is pushed up during press working.
次いで、有底筒状体（３）内からパンチ（４）を抜き取
った後、第２の工程によって開口側拡開部（３ａ）を円
筒状の非拡開部（３ｃ）の口径と実質的に同一の口径に
圧縮する。筒状体（３）の内部からパンチ（４）を抜き
取る際には、パンチスリーブ（６）を同位置に残したま
までパンチピン（５）を上昇させれば、パンチ（４）を
筒状体（３）から容易に離脱させることができる。Next, after removing the punch (4) from the bottomed cylindrical body (3), a second step is performed to make the opening side expanded portion (3a) substantially equal to the diameter of the cylindrical non-expanded portion (3c). compressed to the same caliber. When removing the punch (4) from the inside of the cylindrical body (3), leave the punch sleeve (6) in the same position and raise the punch pin (5) to remove the punch (4) from the cylindrical body (3). 3) can be easily removed.
第２の工程で用いられる第２のパンチ（１２）は非拡開
部（３ｃ）の内径と略同−の外径を有する先端部（１３
ａ）とそれよりも若干細い外径の上方部（＋３ｂ）とか
ら成るパンチピン（１３）と、その上部外周に嵌装され
たパンチスリーブ（１４）とを有している （第６図参
照）、第２の工程では、プレスダイ（２）下方のバック
ダイ（８）の中央部に配置されて丸棒状素材（１）或は
成形された有底筒状体（３）の底面を支持していたノッ
クアウトビン（９）及び支持部材（ｌＯ）を取り外した
後、第２のパンチ（１２）により押圧する。すると、第
２のパンチピン（１３）の先端面（１３ｃ）は、筒状体
（３）の底部（３ｄ）に接した後、この筒状体（３）を
下方へと押し下げる。その結果、し込まれ、非拡開部（
３ｃ）の外径と同一の外径に圧縮される。同時に開口部
（３ａ）の内径も非拡開部（３Ｃ）の内径と実質的に同
一になるように変形される。The second punch (12) used in the second step has a tip end (13
It has a punch pin (13) consisting of a) and an upper part (+3b) with an outer diameter slightly smaller than that, and a punch sleeve (14) fitted around the upper outer circumference (see Fig. 6). In the second step, a press die (2) is placed in the center of the back die (8) below to support the bottom surface of the round bar-shaped material (1) or the formed bottomed cylindrical body (3). After removing the knockout bottle (9) and support member (lO), they are pressed by the second punch (12). Then, the tip surface (13c) of the second punch pin (13) comes into contact with the bottom (3d) of the cylindrical body (3), and then pushes the cylindrical body (3) downward. As a result, the unexpanded area (
It is compressed to the same outer diameter as 3c). At the same time, the inner diameter of the opening (3a) is also deformed to become substantially the same as the inner diameter of the non-expanded portion (3C).
上記第１及び第２の工程によって、筒状体（３）の内面
に両端が封止された軸方向溝（１１）が形成され、その
後、筒状体（３）の底部（３ｄ）を取り除いたり両端及
び内外径等の仕上を行なって弁スリーブを完成する。上
記第２のパンチ（１２）を筒状体（３）から抜き取る際
には、第１のパンチ（４）の場合と同様にパンチスリー
ブ（１４）を用いれば、容易に離脱させることができる
。Through the first and second steps described above, an axial groove (11) with both ends sealed is formed on the inner surface of the cylindrical body (3), and then the bottom (3d) of the cylindrical body (3) is removed. The valve sleeve is completed by finishing both ends and the inner and outer diameters. When the second punch (12) is extracted from the cylindrical body (3), it can be easily removed by using the punch sleeve (14) as in the case of the first punch (4).
本発明方法によって製造される弁スリーブは、従来周知
のものと実質的に同様であり、その詳細は図示しないが
、内周面に上記実施例の場合には６個、その他４匍、８
個等の偶数個の軸方向溝が等間隔で形成されており、こ
の弁スリーブの内部に回転可能に嵌入され、スリーブの
谷溝の周方向両側にオーバーラツプする複数の軸方向溝
を有する弁ロータとともに油圧回転弁を構成する。又、
弁スリーブの溝が等間隔でない場合でも、弁ロータの溝
をこれらの溝に対応させて形成すれば、油圧回転弁を構
成することは可能である。尚、通常油圧回転弁の溝には
、好ましい油圧特性を得るために面取り部が形成されて
いるが、上記第１のノくンチ（４）の突起部（７）の形
状によってこの面取り部を溝と同時に加工することも可
能である。更に、第２のパンチ（１２）のパンチピン（
１３）の形状を、上方部（１３ｂ）の外径が先端部（１
３ａ）の外径と等しくなるよう構成すれば、プレス加工
時に、圧縮される開口部（３ａ）内面のガイドとなり、
筒状体（３）の内周面を正確に一致させることができる
。The valve sleeve manufactured by the method of the present invention is substantially the same as a conventionally known one, and although the details are not shown, the valve sleeve has six valve sleeves on the inner circumferential surface in the case of the above-mentioned embodiment, and 4 valve sleeves and 8 valve sleeves in the other embodiments.
A valve rotor having an even number of axial grooves formed at equal intervals, and rotatably fitted inside the valve sleeve and having a plurality of axial grooves overlapping on both circumferential sides of the valley groove of the sleeve. Together, they form a hydraulic rotary valve. or,
Even if the grooves in the valve sleeve are not equally spaced, it is possible to construct a hydraulic rotary valve by forming the grooves in the valve rotor to correspond to these grooves. Note that a chamfered portion is usually formed in the groove of a hydraulic rotary valve in order to obtain preferable hydraulic characteristics, but this chamfered portion is formed due to the shape of the protrusion (7) of the first punch (4). It is also possible to process the groove at the same time. Furthermore, the punch pin (
13), the outer diameter of the upper part (13b) is the tip part (1
If configured to be equal to the outer diameter of the opening (3a), it will serve as a guide for the inner surface of the opening (3a) that is compressed during press working.
The inner peripheral surfaces of the cylindrical body (3) can be matched accurately.
以上述べたように、本発明方法によれば、単純な直線運
動の繰り返しによって、従来困難とされていた円筒部材
内面の盲溝加工を行なうことができ、弁スリーブの製造
を容易に行なうことができる。As described above, according to the method of the present invention, by repeating a simple linear motion, it is possible to form a blind groove on the inner surface of a cylindrical member, which was conventionally considered difficult, and the valve sleeve can be manufactured easily. can.
第１図〜第６図は本発明の一実施例を示し、第１図は丸
棒状素材の斜視図、第２図はプレスダイ内に配置された
丸棒状素材を示す縦断面図、第３図は第１の工程を示す
縦断面図、第４図及び第５図は第１の工程のパンチピン
を示し、それぞれ正面図、底面図、第６図は８２の工程
を示す縦断面図である。
（１）・・・棒状素材、 （３）・・・有底筒状体、（
３ａ）・・・開口部、 （３Ｃ）・・・非拡開部、（１
１）・・・軸方向溝。
第１図
第２図
第３図
第４図
第５図
第６図
３1 to 6 show an embodiment of the present invention, FIG. 1 is a perspective view of a round bar-shaped material, FIG. 2 is a longitudinal cross-sectional view showing a round bar-shaped material placed in a press die, and FIG. 3 is a vertical sectional view showing the first step, FIGS. 4 and 5 show the punch pin in the first step, and FIG. 6 is a front view, a bottom view, and a vertical sectional view showing the step 82, respectively. (1)...rod-shaped material, (3)...bottomed cylindrical body, (
3a)...Opening part, (3C)...Non-expansion part, (1
1)...Axial groove. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 3
Claims (7)
成形するとともに、この筒状体の内面に両端部を残して
複数の軸方向溝を形成する第１の工程と、筒状体の拡開
された部分を非拡開部と実質的に同一の口径に圧縮する
第２の工程とから成る弁スリーブの製造方法。(1) A first step of forming a rod-shaped material into a bottomed cylindrical body with an enlarged opening, and forming a plurality of axial grooves on the inner surface of this cylindrical body, leaving both ends intact. A second step of compressing the expanded portion of the cylindrical body to substantially the same diameter as the non-expanded portion.
拡開するテーパ状に形成されたプレスダイと、先端円柱
状部の上方に上記プレスダイのテーパと略等しい傾斜の
テーパ部を有し、かつ円柱状部外周に複数の突起部が形
成されたパンチとを用いたプレス加工により行なわれる
ことを特徴とする特許請求の範囲第１項記載の弁スリー
ブの製造方法。(2) The first step involves forming a press die in which the upper inner circumferential surface of the circular hole is formed into a tapered shape that expands upward, and a taper having an inclination approximately equal to the taper of the press die above the cylindrical tip portion. 2. The method of manufacturing a valve sleeve according to claim 1, wherein the manufacturing method is carried out by press working using a punch having a cylindrical portion and a plurality of protrusions formed on the outer periphery of the cylindrical portion.
形成されていることを特徴とする特許請求の範囲第２項
記載の弁スリーブの製造方法。(3) The method for manufacturing a valve sleeve according to claim 2, wherein a plurality of protrusions are formed at equal intervals on the outer periphery of the cylindrical portion of the punch.
することを特徴とする特許請求の範囲第２項又は第３項
記載の弁スリーブの製造方法。(4) The method for manufacturing a valve sleeve according to claim 2 or 3, wherein the protrusion has approximately the same width as the axial groove to be formed.
つその長さが形成される有底筒状体の軸方向長さよりも
短いことを特徴とする特許請求の範囲第２項ないし第４
項のいずれかに記載の弁スリーブの製造方法。(5) The protrusion extends in the axial direction on the outer peripheral surface of the cylindrical part, and the length thereof is shorter than the axial length of the bottomed cylindrical body in which it is formed. paragraph to fourth
A method for manufacturing a valve sleeve according to any one of paragraphs.
許請求の範囲第２項記載の弁スリーブの製造方法。(6) Simultaneously with the axial groove by the first step. 3. The method of manufacturing a valve sleeve according to claim 2, wherein chamfers are formed on both side walls of the valley groove.
等しい内径を有するプレスダイの孔内に、有底筒状体の
拡開された部分を圧入することにより行なわれる特許請
求の範囲第１項記載の弁スリーブの製造方法。(7) Step 82 is carried out by press-fitting the expanded portion of the bottomed cylindrical body into a hole of a press die having an inner diameter approximately equal to the outer diameter of the non-expanded portion of the bottomed cylindrical body. A method for manufacturing a valve sleeve according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6831384A JPS60213331A (en) | 1984-04-05 | 1984-04-05 | Production of valve sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6831384A JPS60213331A (en) | 1984-04-05 | 1984-04-05 | Production of valve sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60213331A true JPS60213331A (en) | 1985-10-25 |
Family
ID=13370197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6831384A Pending JPS60213331A (en) | 1984-04-05 | 1984-04-05 | Production of valve sleeve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60213331A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62197235A (en) * | 1986-02-24 | 1987-08-31 | Tokai T R W Kk | Manufacture of single piece valve sleeve |
| JPS63264235A (en) * | 1987-04-23 | 1988-11-01 | Sekiguchi Sangyo Kk | Manufacture of valve sleeve |
| JPS63264236A (en) * | 1987-04-23 | 1988-11-01 | Sekiguchi Sangyo Kk | Manufacture of valve sleeve |
| JPS63278630A (en) * | 1987-05-08 | 1988-11-16 | Koyo Seiko Co Ltd | Forming method for valve sleeve for rotary valve |
| JPS6454938U (en) * | 1987-09-29 | 1989-04-05 | ||
| JP2015123450A (en) * | 2013-12-25 | 2015-07-06 | 日産自動車株式会社 | Forging-processing method, forging-processing tool, and forged part |
| JP2020066030A (en) * | 2018-10-25 | 2020-04-30 | 大川精螺工業株式会社 | Work-piece processing device, work-piece processing method and processed component |
| JP7123447B1 (en) * | 2021-10-07 | 2022-08-23 | 名古屋技研工業株式会社 | FORGING APPARATUS AND FORGING MANUFACTURING METHOD |
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1984
- 1984-04-05 JP JP6831384A patent/JPS60213331A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62197235A (en) * | 1986-02-24 | 1987-08-31 | Tokai T R W Kk | Manufacture of single piece valve sleeve |
| JPH0361530B2 (en) * | 1986-02-24 | 1991-09-20 | Teii Aaru Daburyu Esu Ai Kk | |
| JPS63264235A (en) * | 1987-04-23 | 1988-11-01 | Sekiguchi Sangyo Kk | Manufacture of valve sleeve |
| JPS63264236A (en) * | 1987-04-23 | 1988-11-01 | Sekiguchi Sangyo Kk | Manufacture of valve sleeve |
| JPH0337809B2 (en) * | 1987-04-23 | 1991-06-06 | Sekiguchi Sangyo Kk | |
| JPH0575494B2 (en) * | 1987-04-23 | 1993-10-20 | Sekiguchi Sangyo Kk | |
| JPS63278630A (en) * | 1987-05-08 | 1988-11-16 | Koyo Seiko Co Ltd | Forming method for valve sleeve for rotary valve |
| JPS6454938U (en) * | 1987-09-29 | 1989-04-05 | ||
| JP2015123450A (en) * | 2013-12-25 | 2015-07-06 | 日産自動車株式会社 | Forging-processing method, forging-processing tool, and forged part |
| JP2020066030A (en) * | 2018-10-25 | 2020-04-30 | 大川精螺工業株式会社 | Work-piece processing device, work-piece processing method and processed component |
| JP7123447B1 (en) * | 2021-10-07 | 2022-08-23 | 名古屋技研工業株式会社 | FORGING APPARATUS AND FORGING MANUFACTURING METHOD |
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