JPH0446639A - Cylinder and its working tool - Google Patents
Cylinder and its working toolInfo
- Publication number
- JPH0446639A JPH0446639A JP2154255A JP15425590A JPH0446639A JP H0446639 A JPH0446639 A JP H0446639A JP 2154255 A JP2154255 A JP 2154255A JP 15425590 A JP15425590 A JP 15425590A JP H0446639 A JPH0446639 A JP H0446639A
- Authority
- JP
- Japan
- Prior art keywords
- cylinder
- hole
- chamfered portion
- chamfered part
- circumferential direction
- 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.)
- Granted
Links
- 238000004080 punching Methods 0.000 claims description 2
- 238000007789 sealing Methods 0.000 abstract description 5
- 230000002093 peripheral effect Effects 0.000 abstract description 3
- 238000003754 machining Methods 0.000 description 6
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J10/00—Engine or like cylinders; Features of hollow, e.g. cylindrical, bodies in general
- F16J10/02—Cylinders designed to receive moving pistons or plungers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J10/00—Engine or like cylinders; Features of hollow, e.g. cylindrical, bodies in general
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1428—Cylinders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/149—Fluid interconnections, e.g. fluid connectors, passages
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Punching Or Piercing (AREA)
- Milling Processes (AREA)
- Forging (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、動力舵取装置の流体給排用接続部材に連通ず
る貫通穴を備え、内径部をシール部材が摺動するシリン
ダとその加工用工具に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a cylinder having a through hole communicating with a fluid supply/discharge connection member of a power steering device and having a seal member sliding on the inner diameter thereof, and its processing. This relates to tools for use.
（従来の技術）
一般に、第１０図に示されているような動力舵取装置に
用いられるシリンダ（２）は、ポンプからの圧油を貫通
穴（３）を介して、ピストン（７）に密嵌されたシール
部材（４）により区画された室（８ａ）。(Prior Art) Generally, a cylinder (2) used in a power steering device as shown in FIG. 10 supplies pressure oil from a pump to a piston (7) through a through hole (3). A chamber (8a) partitioned by a tightly fitted seal member (4).
（８ｂ）内に導入又は排出させることにより、ピストン
（７）を進退動させている。この貫通穴（３）は、第１
１図に示されるようにプレス装置（図示せず）によりパ
ンチ（１０）の挿入先端部（１０ａ）をシリンダ（２）
の内側から外方にプレスして成型加工されるとともに、
この貫通穴（３）のシリンダ（２）側聞口部周縁は、プ
レス時にパンチ（ｌＯ）の基端部の同周上でパンチ（１
０）の軸方向に対して湾曲又は傾斜して設けられた面取
り加工部（１１）に圧接され、シリンダ（２）の面取り
部（５）はこのパンチ（ｌＯ）の面取り加工部（１１）
を転写して成形されている（特開昭６２−２４０１１７
号公報、特開昭２−３５２０６号公報参照）。By introducing or discharging the piston (8b), the piston (7) is moved forward and backward. This through hole (3) is the first
As shown in Figure 1, the insertion tip (10a) of the punch (10) is inserted into the cylinder (2) using a press device (not shown).
It is molded by pressing from the inside outward, and
The peripheral edge of the opening on the cylinder (2) side of this through hole (3) is placed on the same circumference of the base end of the punch (lO) during pressing.
The chamfered part (5) of the cylinder (2) is pressed against the chamfered part (11) which is curved or inclined with respect to the axial direction of the punch (10).
(Japanese Unexamined Patent Publication No. 62-240117)
(See Japanese Patent Application Laid-Open No. 2-35206).
〔発明が解決しようとする課題］
しかしながら、従来の貫通穴（３）の面取り部（５）で
は、貫通穴（３）の穴径を（ｄ） シリンダ（２）の
内径を（Ｄ） とした時、穴径（ｄ）か相対的に小さい
場合（第１３図参照）、すなわちｄ／Ｄが小さい時（略
５％以内）に比較して、穴径（ｄ）が相対的に大きい場
合（第１４図参照）、すなわちｄ／Ｄが５％を越えてし
まうと、貫通穴（３）の開口周縁の面取り部（５）がシ
リンダ（２）の同上の位置によって湾曲の大きさが異な
ってしまう（第１１図および第１２図のエリア（Ａ＋＋
）参照）。[Problems to be Solved by the Invention] However, in the conventional chamfered portion (5) of the through hole (3), the hole diameter of the through hole (3) is (d), and the inner diameter of the cylinder (2) is (D). When the hole diameter (d) is relatively small (see Figure 13), that is, when the hole diameter (d) is relatively large compared to when d/D is small (approximately within 5%) ( (see Figure 14), that is, if d/D exceeds 5%, the chamfered portion (5) of the opening periphery of the through hole (3) will have a different degree of curvature depending on the position of the cylinder (2). (areas shown in Figures 11 and 12 (A++
)reference).
このため、シリンダ（２）内部をシール部材（４）が摺
動する際、シール部材（４）に傷がつきやすくなり、破
損の原因となるばかりでなく、シリンダ（２）の両室（
８ａ） 、 （８ｂ）の適正な圧力確保が不安定にな
るなどの問題があった。For this reason, when the seal member (4) slides inside the cylinder (2), the seal member (4) is easily scratched, which not only causes damage, but also causes damage to both chambers of the cylinder (2).
8a) and (8b), there were problems such as making it unstable to ensure proper pressure.
本発明は上記欠点を除くためになされたもので、シリン
ダ貫通穴の開口周縁を周方向上略均一な面取り部として
形成することのできるシリンダとその加工用工具を提供
することを目的とする。The present invention has been made to eliminate the above-mentioned drawbacks, and an object of the present invention is to provide a cylinder and a tool for machining the same, in which the opening periphery of a cylinder through hole can be formed as a substantially uniform chamfer in the circumferential direction.
（課題を解決するための手段）
本発明に係るシリンダは、シリンダに穿設された貫通穴
の面取り部を周方向に沿って鞍部状に湾曲形成したもの
である。(Means for Solving the Problems) A cylinder according to the present invention has a chamfered portion of a through hole formed in the cylinder curved into a saddle shape along the circumferential direction.
また本発明に係るシリンダの加工用工具は、加圧手段に
よりシリンダに貫通穴を穿設するパンチの基端部に面取
り加工部を設け、この面取り加工部をシリンダの周方向
に沿って鞍部状に湾曲構成したものである。Further, in the cylinder machining tool according to the present invention, a chamfered portion is provided at the base end of a punch for punching a through hole in the cylinder by a pressurizing means, and the chamfered portion is shaped like a saddle along the circumferential direction of the cylinder. It has a curved configuration.
〔作用）
本発明によれば、シリンダ貫通穴の面取り部を周方向に
沿って鞍部状に湾曲形成したことにより、シール部材の
摺動を滑らかにすることかできる。[Function] According to the present invention, the chamfered portion of the cylinder through hole is curved into a saddle shape along the circumferential direction, so that the seal member can slide smoothly.
（実施例）
以下、図示実施例により本発明を説明する。第１図は、
本発明の一実施例に係るシリンダを示す断面図、第２図
右側半分、左側半分はそれぞれ本発明の一実施例に係る
シリンダの加工用工具を示す側面図および正面図である
。(Example) The present invention will be described below with reference to illustrated examples. Figure 1 shows
FIG. 2 is a cross-sectional view showing a cylinder according to an embodiment of the present invention, and the right half and left half of FIG. 2 are a side view and a front view, respectively, showing a cylinder machining tool according to an embodiment of the present invention.
また、第３図は上記加工用工具でシリンダに貫通穴が穿
設されている状態を示すシリンダの平面図である。シリ
ンダ（２）に穿設された貫通穴（３）の内端間口周縁に
は、湾曲して成形された面取り部（Ｒ面取り部） （２
０）が設けられており（第７図（ａ）参照）、この面取
り部（２０）は、シリンダ（２）の周方向に沿って鞍部
状に湾曲して形成されている。従って、貫通穴（３）の
面取り部（２ｏ）からシリンダ（２）の軸芯（ｏｌ）と
の距離は均一であり、シリンダ（２）の内径と一致して
おり、さらに、面取り部（２０）の径方向の幅（Ｗ）も
均一となっている。Moreover, FIG. 3 is a plan view of the cylinder showing a state in which a through hole is bored in the cylinder using the processing tool. A curved chamfer (R chamfer) (2
0) (see FIG. 7(a)), and this chamfered portion (20) is curved into a saddle shape along the circumferential direction of the cylinder (2). Therefore, the distance from the chamfer (2o) of the through hole (3) to the axis (ol) of the cylinder (2) is uniform and coincides with the inner diameter of the cylinder (2). ) is also uniform in radial width (W).
次に、このシリンダ（２）の面取り部（２ｏ）を加工す
る加工用工具（パンチ） （３０）について説明する。Next, a processing tool (punch) (30) for processing the chamfered portion (2o) of this cylinder (2) will be explained.
この加工用工具（３０）は図示しないプレス装置により
挿入先端部（３０ａ）がシリンダ（２）の軸線とこの加
工用工具（３０）の軸芯とを一致させた位置でシリンダ
（２）の内側部から外方に圧入されて貫通穴（３）を穿
設する。また、挿入先端部（３０ａ）に連続する基端部
には、面取り加工部（３０ｂ）か設けられており、この
面取り加工部（３０ｂ）はシリンダ（２）の周方向に沿
って、鞍部状に湾曲して構成されている（第７図（ａ）
参照）。従って、加工用工具（３０）の面取り加工部（
３０ｂ）におけるシリンダ（２）の軸線方向断面（第３
図ｒＶ−ＩＶ線断面、第４図参照）は、シリンダ（２）
の内側面長手方向に対応して矩形状になるとともに（第
４図斜線部のエリア（Ａ４）参照）、この面取り加工部
（３０ｂ）のシリンダ（２）の径方向断面（第３図Ｖｌ
−Ｖｌ線断面、第６図参照）は、シリンダ（２）の周方
向に沿って弧状に湾曲している（第６図斜線部のエリア
（Ａ６）参照）。すなわち、面取り加工部（３０ｂ）の
最下端部の周方向位置を（ＰＩ）、上端部位置を（ｐｈ
）、これらの位置間の上下幅を（）Ｉ） また、シリ
ンダ（２）の軸線方向に一致した角度をＯ” （第３
図ｏ２−■線）とし、加工用工具（３０）の円周方向角
度を（θ）とすると、θ＝０°又はθ＝１８０° （第
３図ＴＶ−ｏ２線）のとき、上下幅（ＨＭＡＸ）は最大
となり、角度（θ）が０６から９０°又は１８０°から
２７０°では、上下幅（）Ｉ）はシリンダ（２）の周方
向に沿って小さくなってゆく。そして、θ＝９０°又は
θ＝２７０°で、すなわちシリンダ（２）の軸線に対し
て垂直な角度で、上下幅（ＨＭＩＮ）は最小となり、再
び角度（θ）が９０°から１８０°又は２７０゜から３
６０°で上下幅（Ｈ）は大きくなってゆく（第７図（ｃ
）参照）。しかも、面取り加工部（３０ｂ）のシリンダ
（２）に圧接する部分の幅（Ｗ）は常に均かつ一定であ
る（第７図（ｂ）参照）。This processing tool (30) is inserted inside the cylinder (2) at a position where the insertion tip (30a) is aligned with the axis of the cylinder (2) and the axis of this processing tool (30) using a press device (not shown). A through hole (3) is formed by being press-fitted outward from the section. Further, a chamfered portion (30b) is provided at the proximal end portion continuous with the insertion tip portion (30a), and this chamfered portion (30b) is shaped like a saddle along the circumferential direction of the cylinder (2). (Figure 7(a)
reference). Therefore, the chamfered portion (
30b) of the cylinder (2) in the axial direction (3rd
Figure rV-IV line cross section, see Figure 4) is the cylinder (2)
The chamfered portion (30b) has a rectangular shape corresponding to the longitudinal direction of the inner surface (see the shaded area (A4) in FIG. 4), and the radial cross section of the cylinder (2) of the chamfered portion (30b)
-Vl line cross section, see FIG. 6) is curved in an arc along the circumferential direction of the cylinder (2) (see the shaded area (A6) in FIG. 6). That is, the circumferential position of the lowermost end of the chamfered portion (30b) is (PI), and the upper end position is (ph
), the vertical width between these positions is ()I), and the angle that coincides with the axial direction of the cylinder (2) is O” (3rd
If the angle in the circumferential direction of the processing tool (30) is (θ), then when θ=0° or θ=180° (Fig. 3 TV-o2 line), the vertical width ( HMAX) is maximum, and when the angle (θ) is from 06 to 90° or from 180° to 270°, the vertical width (I) becomes smaller along the circumferential direction of the cylinder (2). Then, at θ=90° or θ=270°, that is, at an angle perpendicular to the axis of the cylinder (2), the vertical width (HMIN) becomes minimum, and again the angle (θ) changes from 90° to 180° or 270°. ° to 3
At 60°, the vertical width (H) increases (Fig. 7(c)
)reference). Moreover, the width (W) of the portion of the chamfered portion (30b) that comes into pressure contact with the cylinder (2) is always uniform and constant (see FIG. 7(b)).
第８図は面取り加工部（３１ｃ）がＣ面取りに形成され
た加工用工具（３０）を示すものであり、上記第７図（
ａ） に示された実施例と同様に、シリンダ（２）の面
取り部（２１）はシリンダ（２）の軸芯（０１）との距
離も径方向幅（Ｗ）も均一である。FIG. 8 shows a processing tool (30) in which the chamfered portion (31c) is formed into a C chamfer, and is similar to the above-mentioned FIG.
Similar to the embodiment shown in a), the chamfered portion (21) of the cylinder (2) has a uniform distance from the axis (01) of the cylinder (2) and a uniform radial width (W).
第９図は本発明に係る加工用工具（３０）の他の実施例
を示すもので、シリンダ（２）の軸線と加工用工具（３
０）の軸芯とがずれた位置で、加工用工具（３０）の挿
入先端部（３０ａ）がシリンダ（２）に圧入されている
。また、シリンダ（２）の内径の接線（Ｌｃ）と面取り
加工部（３０ｂ）の径（Ｒ）の接線（ＬＲ）とのなす角
度 （α）、（β）を適切な角度とすることにより、シ
ール部材（４）の通過に適した所望の面取り加工又はア
ール加工が可能となる。さらに、上述の如く構成された
シリンダ（２）では段差付きの粗管（バテット管）を用
いる必要がなく、ストレート引抜管を用いることもでき
る。FIG. 9 shows another embodiment of the processing tool (30) according to the present invention, in which the axis of the cylinder (2) and the processing tool (30) are shown.
The insertion tip (30a) of the processing tool (30) is press-fitted into the cylinder (2) at a position offset from the axis of the processing tool (30). In addition, by setting the angles (α) and (β) between the tangent (Lc) of the inner diameter of the cylinder (2) and the tangent (LR) of the diameter (R) of the chamfered portion (30b) to appropriate angles, A desired chamfering or rounding process suitable for passage of the sealing member (4) is possible. Furthermore, in the cylinder (2) configured as described above, there is no need to use a rough tube with a step (butt tube), and a straight drawn tube can also be used.
〔発明の効果］
以上述べたように、本発明によれば、シリンダに穿設さ
れた貫通穴の面取り部を周方向に沿って鞍部状に湾曲形
成したので、シール部材の円滑な摺動を確保でき、シー
ル部材の破損を防止Ｃきる効果がある。[Effects of the Invention] As described above, according to the present invention, the chamfered portion of the through hole drilled in the cylinder is curved into a saddle shape along the circumferential direction, so that smooth sliding of the sealing member is facilitated. This has the effect of preventing damage to the sealing member.
第１図は本発明の一実施例に係るシリンダを示す断面図
、第２図右側半分、左側半分はそれぞれ本発明の一実施
例に係るシリンダの加工用工具を示す側面図および正面
図、第３図は上記加工用工具をシリンダに圧入した際の
平面図、第４図〜第６図はそれぞれ第３図の０２−■線
断面、０２−Ｖ線断面、ｏ２−Ｖｌ線断面を示す断面図
、第７図（ａ）はシリンダに上記加工用工具を圧入した
際の説明図、第７図（ｂ） 、 （ｃ）はそれぞれ上記
加工用工具の面取り加工部における角度に応じたシリン
ダへの圧接部と上下幅とを示す説明図、第８図、第９図
はそれぞれ本発明の他の実施例に係るシリンダの加工用
工具を示す側面図、第１Ｏ図は従来の動力舵取装置の構
成を示す断面図、第１１図、第１２図はそれぞれ従来の
加工用工具を圧入した際の説明図、第１３図、第１４図
はそれぞれ従来のシリンダを示す断面図である。
２）・・・シリンダ、
５） 、 （２０） 、 （２１）・・・面取り部、３
）・・・貫通孔、
１０）、 ’（３０）・・・加工用工具（パンチ）、１
１） 、 （３０ｂ） 、 （３１ｃ）・・・面取り加
工部。
第１図
特許出願人 自動車機器株式会社
代理人 弁理士 山 崎 宗 秋
！−−−二１
―」
第
図
−２・
軸
第
図FIG. 1 is a cross-sectional view showing a cylinder according to an embodiment of the present invention, FIG. Figure 3 is a plan view when the above-mentioned processing tool is press-fitted into the cylinder, and Figures 4 to 6 are cross sections showing the 02-■, 02-V, and o2-Vl lines of Figure 3, respectively. Figure 7(a) is an explanatory diagram when the above-mentioned machining tool is press-fitted into the cylinder, and Fig. 7(b) and (c) are respectively views of the cylinder according to the angle of the chamfered part of the above-mentioned machining tool. FIGS. 8 and 9 are side views showing cylinder machining tools according to other embodiments of the present invention, and FIG. 1O is a conventional power steering device. FIGS. 11 and 12 are explanatory views showing a conventional processing tool press-fitted therein, and FIGS. 13 and 14 are cross-sectional views showing a conventional cylinder, respectively. 2)...Cylinder, 5), (20), (21)...Chamfer, 3
)...Through hole, 10), '(30)...Processing tool (punch), 1
1), (30b), (31c)... Chamfered portion. Figure 1 Patent applicant: Jidosha Kiki Co., Ltd. Representative Patent attorney Sou Yamazaki Aki! ---21 -" Figure-2・Axis diagram
Claims (2)
に沿って鞍部状に湾曲形成したことを特徴とするシリン
ダ。(1) A cylinder characterized in that a chamfered portion of a through hole formed in the cylinder is curved in a saddle shape along the circumferential direction.
チの基端部に面取り加工部を設け、この面取り加工部を
シリンダの周方向に沿って鞍部状に湾曲構成したことを
特徴とするシリンダの加工用工具。(2) A chamfered portion is provided at the base end of the punch for punching a through hole in the cylinder by means of pressure, and the chamfered portion is curved into a saddle shape along the circumferential direction of the cylinder. Tools for processing cylinders.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2154255A JP2844010B2 (en) | 1990-06-13 | 1990-06-13 | Cylinders and their machining tools |
| DE4119546A DE4119546A1 (en) | 1990-06-13 | 1991-06-13 | Formation of passageway in servo-cylinder wall - uses press tool with narrowed tip having curved section to produce uniform curved passageway entrance |
| KR1019910009774A KR920001104A (en) | 1990-06-13 | 1991-06-13 | Cylinders and their processing tools |
| KR94021297U KR940007571Y1 (en) | 1990-06-13 | 1994-08-23 | Cylinder and tools for work the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2154255A JP2844010B2 (en) | 1990-06-13 | 1990-06-13 | Cylinders and their machining tools |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0446639A true JPH0446639A (en) | 1992-02-17 |
| JP2844010B2 JP2844010B2 (en) | 1999-01-06 |
Family
ID=15580213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2154255A Expired - Fee Related JP2844010B2 (en) | 1990-06-13 | 1990-06-13 | Cylinders and their machining tools |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2844010B2 (en) |
| KR (1) | KR920001104A (en) |
| DE (1) | DE4119546A1 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3848497A (en) * | 1973-11-07 | 1974-11-19 | Whitney Corp W | Press for punching holes in tubular members |
| US4227393A (en) * | 1979-01-03 | 1980-10-14 | Anvil Corporation | Method and apparatus for punching openings in tubes |
| DE3942206C2 (en) * | 1989-12-21 | 1999-09-30 | Diatest Hermann Koeltgen Gmbh | Probe for bore gauges |
-
1990
- 1990-06-13 JP JP2154255A patent/JP2844010B2/en not_active Expired - Fee Related
-
1991
- 1991-06-13 DE DE4119546A patent/DE4119546A1/en not_active Ceased
- 1991-06-13 KR KR1019910009774A patent/KR920001104A/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| DE4119546A1 (en) | 1991-12-19 |
| JP2844010B2 (en) | 1999-01-06 |
| KR920001104A (en) | 1992-01-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6485220B2 (en) | Tool joint | |
| US5890287A (en) | Connection structure and process for connecting eye joints and slender metal pipes | |
| KR100754420B1 (en) | Cutting tool | |
| JP4520455B2 (en) | Tool coupling for rotary tools | |
| US5779283A (en) | Pipe joint unit | |
| US5421682A (en) | Tool bit chucking shank | |
| KR20040077799A (en) | Tool coupling for rotating tool | |
| US20050089382A1 (en) | Milling tool holder with threaded plug | |
| US4862571A (en) | Method of making a valve sleeve | |
| JP2760269B2 (en) | Manufacturing method of bulge-shaped piping | |
| US6471595B1 (en) | Rotary joint | |
| JP2827129B2 (en) | Fuel delivery pipe and its processing method | |
| JPH0446639A (en) | Cylinder and its working tool | |
| US5140881A (en) | Apparatus for manufacturing a cylinder with a connected sleeve | |
| US5222771A (en) | Brazed pipe assembly and method | |
| JPH0741351B2 (en) | Punch for forging | |
| JPH0618614Y2 (en) | Application destination of applicator with valve | |
| JP4378907B2 (en) | Seal end face processing method | |
| CA2312632A1 (en) | Surface finish for a press-fit part | |
| US11951531B2 (en) | Method and device for producing a hose nipple | |
| JPS5821605Y2 (en) | Hydraulic holding device | |
| JP2005140304A (en) | In-core | |
| JP2575656Y2 (en) | Fluid pressure chuck device | |
| US20010047677A1 (en) | Apparatus and method for forming flanged openings | |
| US20040139775A1 (en) | Method of forming double O-ring |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |