JPS62271616A - Manufacture of pipe joint - Google Patents
Manufacture of pipe jointInfo
- Publication number
- JPS62271616A JPS62271616A JP11598986A JP11598986A JPS62271616A JP S62271616 A JPS62271616 A JP S62271616A JP 11598986 A JP11598986 A JP 11598986A JP 11598986 A JP11598986 A JP 11598986A JP S62271616 A JPS62271616 A JP S62271616A
- Authority
- JP
- Japan
- Prior art keywords
- pipe joint
- cutter
- cut
- taper
- taper cutter
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 13
- 238000000034 method Methods 0.000 claims description 11
- 238000005520 cutting process Methods 0.000 claims description 7
- 235000013290 Sagittaria latifolia Nutrition 0.000 abstract 1
- 235000015246 common arrowhead Nutrition 0.000 abstract 1
- 239000002184 metal Substances 0.000 description 5
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 235000013351 cheese Nutrition 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 239000001963 growth medium Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Landscapes
- Milling Processes (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
- Branch Pipes, Bends, And The Like (AREA)
Abstract
Description
【発明の詳細な説明】
３、発明の詳細な説明
「産業上の利用分野」
この発明は、本体が金属製である管継手の内面をプラス
チックで覆った管継手において、その屈曲部の内周がＲ
加工された管継手の製造方法に関するものである。[Detailed Description of the Invention] 3. Detailed Description of the Invention "Field of Industrial Application" This invention relates to a pipe joint whose main body is made of metal and whose inner surface is covered with plastic. is R
The present invention relates to a method of manufacturing a processed pipe joint.
「従来の技術」
最近の配管材料には、金属管、および金属製の管継手の
内面をプラスチックで覆ったものが、防蝕の目的で使用
されている。管継手の場合は、プラスチックを射出成形
して金属継手の内面にプラスチック製の内層を形成して
いる。この場合、所定の径の金属継手内にさらにプラス
チック層を形成しているために、当然のことながら培体
の流通部分の内径は小さくなる。"Prior Art" Recent piping materials include metal pipes and metal pipe joints whose inner surfaces are covered with plastic for corrosion prevention purposes. In the case of pipe fittings, plastic is injection molded to form an inner layer of plastic on the inner surface of the metal fitting. In this case, since a plastic layer is further formed within the metal joint having a predetermined diameter, the inner diameter of the culture medium circulation portion is naturally reduced.
また、これらの管継手の中でＬ形曲り継手（エルボ）や
、Ｔ形分岐継手（チーズ）等は内径において直交する部
分の一部分が直角形状になる。この直角部分は、内部を
通過する液体に対し、圧力損失や流量の減少の原因とし
て非常に大きく作用する。ところでこの直角部分は、射
出成形金型内にプラスチック材料を射出した後、管継手
の内径を確保するための空間を形造っている金型内部コ
アを、直線的に引抜く構造のために生じるものである。Further, among these pipe joints, an L-shaped bent joint (elbow), a T-shaped branch joint (cheese), etc. have a part of the orthogonal part in the inner diameter formed into a right-angled shape. This right-angled portion has a very large effect on the liquid passing through it, causing a pressure loss and a reduction in flow rate. By the way, this right-angled part occurs because the inner core of the mold, which forms the space to secure the inner diameter of the pipe joint, is pulled out in a straight line after the plastic material is injected into the injection mold. It is something.
そして、この内部直角部分をＲ加工して所定半径を有す
るようにすれば、圧力損失や流量の減少を解消するため
に非常に効果があることが分つている。It has been found that if this internal right-angled portion is rounded to have a predetermined radius, it is very effective in eliminating pressure loss and flow rate reduction.
上記直角部分を所定半径にＲ加工する方法としては、金
型内部コアの直交部分の一部を半円形状に細工した部品
を別途製作し、これを内部コアに係合させて半円形状の
アンダーカット部を残しておき、先ず内部コアの直線的
な引抜構造で内部コアのみを引抜き、内部コアを引抜い
た後の空間を利用して、上述の半円形状の部品を取り出
す方法がある。The method of R-machining the above-mentioned right-angled part to a predetermined radius is to separately manufacture a part in which a part of the orthogonal part of the inner core of the mold is shaped into a semicircular shape, and engage this part with the inner core to form a semicircular shape. There is a method of leaving an undercut portion, first pulling out only the inner core using a linear drawing structure of the inner core, and then using the space after pulling out the inner core to take out the above-mentioned semicircular component.
「発明が解決しようとする問題点」
上記方法においては、サイズの大きいものは物理的に細
工も可能であるが、小さいサイズでは内部コアの冷却水
を通す穴の関係と、小さな部品でしかも切片形状のため
力学的に無理が多く、はとんど不可能である。"Problems to be Solved by the Invention" In the above method, it is possible to physically modify large-sized parts, but for small-sized parts, it is difficult to make small parts due to the relationship between the holes for the cooling water in the inner core, and the fact that small parts can be cut. Due to its shape, it is mechanically difficult and almost impossible.
この発明の管継手の製造方法は、従来例の上記欠点を解
消しようとするものである。すなわち上記欠点を、特殊
形状の刃物と、その刃物を直線運動および刃物自体を回
転させ、あるいは被切削物を回転させることによって上
記直角部分を半円形状に切削し、非常に簡単に加工でき
るようにしたものである。The method of manufacturing a pipe joint of the present invention is intended to eliminate the above-mentioned drawbacks of the conventional example. In other words, the above-mentioned drawbacks can be solved by using a special-shaped cutter, and by moving the cutter linearly and rotating the cutter itself, or by rotating the workpiece, the right-angled part can be cut into a semicircular shape, making it very easy to process. This is what I did.
ｒ問題点を解決するための手段」
すなわち、この発明の管継手の製造方法は、屈曲部を有
するプラスチック製内層を形成した管継手の製造方法に
おいて、上記管継手内周の屈曲部に当接する位置に保持
されて回転切削するテーパカッターと、上記管継手を保
持する支持機構と、テーパカッターとこの支持機構とを
上記屈曲部内周において得ようとしている所定のＲの半
径中心を回転中心として、相対的に回転させる駆動機構
とを有することを特徴とするものである。In other words, the method for manufacturing a pipe joint of the present invention includes a method for manufacturing a pipe joint in which a plastic inner layer having a bent portion is formed, the inner layer being in contact with the bent portion on the inner periphery of the pipe joint. A taper cutter that is held in position and performs rotational cutting, a support mechanism that holds the pipe joint, and a rotation center of the taper cutter and this support mechanism around the radius center of a predetermined radius that is to be obtained on the inner periphery of the bent portion, The device is characterized by having a drive mechanism for relatively rotating the device.
この発明において使用しているテーパカッターは、先端
の刃の部分が末広がりのテーパに形成されている。この
テーパの角度は、テーパカッターの長さ方向に対して４
５°以下であればよい、すなわち、テーパカッターと管
継手の支持機構との相対的な回転角度を大きくすること
ができれば、Ｈの端部も滑らかにすることができる。The taper cutter used in this invention has a tip end tapered to widen toward the end. The angle of this taper is 4 with respect to the length direction of the taper cutter.
It only needs to be 5 degrees or less, that is, if the relative rotation angle between the taper cutter and the support mechanism of the pipe joint can be increased, the end of H can also be made smooth.
上記テーパカッターと管継手を保持する支持機構とは、
上記屈曲部内周において得ようとしている所定のＨの半
径中心を回転中心として、相対的に回転する。この回転
は、テーパカッター側を軸方向に所定角度回転させても
、支持機構を回転させてもよい。The support mechanism that holds the taper cutter and pipe joint is as follows:
It rotates relatively around the radial center of a predetermined H to be obtained on the inner periphery of the bent portion. This rotation may be performed by rotating the tapered cutter side by a predetermined angle in the axial direction, or by rotating the support mechanism.
「実施例」 以下、この発明の一実施例を図面に基いて説明する。"Example" An embodiment of the present invention will be described below with reference to the drawings.
第１図ないし第３図において、１は屈曲部３を有するプ
ラスチック製内層２を形成した管継手本体であり、鋳物
等によって製造されている。この管継手本体ｌの内側に
プラスチック製内層２を形成するには、金型内に管継手
本体ｌをインサートしておき、管継手本体１の内周との
間に所定の間隙をおいて内部コアを挿入してキャビティ
を形成し、このキャビティ内にプラスチック材料を射出
成形すればよい。In FIGS. 1 to 3, reference numeral 1 denotes a pipe joint body formed with a plastic inner layer 2 having a bent portion 3, and is manufactured by casting or the like. To form the plastic inner layer 2 inside the pipe fitting body 1, insert the pipe fitting body 1 into a mold, and insert the inner layer 2 with a predetermined gap between it and the inner periphery of the pipe fitting body 1. The core may be inserted to form a cavity and the plastic material may be injection molded into the cavity.
この場合、射出成形金型内にプラスチック材料を射出し
た後、管継手の内径を確保するための空間を形造ってい
る金型内部コアを直線的に引抜く構造のために、内部コ
アの直交する部分には直角部分が生じてしまう、この発
明は、この直角部分からなる屈曲部３をＲ加工し、所定
半径を有するようにして、圧力損失や流量の減少を解消
するものである。In this case, after the plastic material is injected into the injection mold, the inner core of the mold, which forms the space for securing the inner diameter of the pipe joint, is pulled out in a straight line, so the inner core is orthogonally drawn. In this invention, the bent portion 3 consisting of the right-angled portion is rounded to have a predetermined radius, thereby eliminating the pressure loss and the decrease in flow rate.
４は、上記管継手本体ｌの屈曲部３内周に当接する位置
に保持されて、所定のモータ等により駆動される高速回
転するテーパカッターである。上記テーパカッター４は
、先端の刃５の部分が末広がりのテーパに形成されてい
る。そしてこのテーパの角度は、テーパカッター４の長
さ方向に対して４５°以下であればよい、すなわち、テ
ーパカッター４と管継手本体ｌの支持機構との相対的な
回転角度を大きくすることができれば、Ｈの端部も滑ら
かにすることができる。さらに、テーパカッター４の最
大径を管継手本体！の内径に可能な限り近ずければ、上
記Ｈの幅方向にも充分切削することができる。Reference numeral 4 denotes a taper cutter that is held at a position in contact with the inner periphery of the bent portion 3 of the pipe joint body 1 and rotates at high speed driven by a predetermined motor or the like. The taper cutter 4 has a blade 5 at the tip tapered to widen toward the end. The angle of this taper may be 45° or less with respect to the length direction of the taper cutter 4. In other words, it is possible to increase the relative rotation angle between the taper cutter 4 and the support mechanism of the pipe fitting body l. If possible, the edges of the H can also be smoothed. Furthermore, the maximum diameter of the taper cutter 4 is the pipe fitting body! If it is as close as possible to the inner diameter of H, sufficient cutting can be performed in the width direction of H.
上記管継手本体１は、Ｈの半径中心に垂直に設けた回転
軸（図示せず）の頂部に自動機のハンド等で保持されて
おり、このように構成された支持機構は上記回転軸を回
転することにより、管継手本体ｌをＲの半径中心を回転
中心として回転させることができる。The pipe joint body 1 is held by an automatic hand or the like on the top of a rotating shaft (not shown) provided perpendicularly to the radius center of H, and the support mechanism configured in this way supports the rotating shaft. By rotating, the pipe joint body l can be rotated about the radius center of R as the rotation center.
次にこの発明の管継手の製造方法を各工程別に説明する
。Next, each step of the manufacturing method of the pipe joint of the present invention will be explained.
先ず第１図に示すように、管継手本体１を、得ようとす
るＲの半径中心に垂直に設けた回転軸の頂部に保持し、
これをテーパカッター４が内周には入り込むように前進
させる０次いで、第２図に示すように管継手本体１を横
移動させて、高速回転中のテーパカッター４の刃５を、
管継手本体１のプラスチック製内層２の屈曲部３に当接
し、その断面で見てテーパ自体の角度に切削させる。最
後に上記回転軸によって管継手本体１を得ようとするＨ
の半径中心を回転中心として所定の角度回転させると、
管継手本体ｌのプラスチック製内層２の屈曲部３は、上
記テーパ上の刃５によってその断面で見て、所定の半径
のＲに切削される。First, as shown in FIG. 1, the pipe joint body 1 is held at the top of a rotating shaft perpendicular to the center of the radius of R to be obtained.
This is advanced so that the taper cutter 4 enters the inner periphery.Then, as shown in FIG.
It comes into contact with the bent part 3 of the plastic inner layer 2 of the pipe joint body 1, and is cut to the angle of the taper itself when viewed in cross section. Finally, try to obtain the pipe joint body 1 using the rotating shaft
When rotated by a predetermined angle using the radius center as the rotation center,
The bent portion 3 of the plastic inner layer 2 of the pipe joint body 1 is cut to a predetermined radius R when viewed in cross section by the tapered blade 5.
この実施例においては、管継手本体１を得ようとするＨ
の半径中心を回転中心として所定の角度回転させている
が、本発明の主旨を変えない限りにおいて、テーパカッ
ターを回転する等の変形が可能である。In this embodiment, H
Although the cutter is rotated by a predetermined angle about the radial center of the cutter, modifications such as rotating the taper cutter are possible as long as the gist of the present invention is not changed.
［発明の効果」
この発明の管継手の製造方法は上記のように構成したか
ら、圧力損失や流量の減少が解消された有用な管継手を
提供することができる。[Effects of the Invention] Since the method for manufacturing a pipe joint of the present invention is configured as described above, it is possible to provide a useful pipe joint in which pressure loss and reduction in flow rate are eliminated.
また、上記切削加工時にプラスチック製の内層のパリも
取ることができる上、全体として自動化により効率よく
製造することができる管継手の製造方法を提供すること
ができる。In addition, it is possible to provide a method for manufacturing a pipe joint that can remove flakes from the plastic inner layer during the cutting process and can be manufactured efficiently as a whole through automation.
勿論、この発明の管継手の製造方法は、図示した構造の
管継手のみならず、屈曲部を有するものであればどの形
式の管継手にも適用することができる。Of course, the method for manufacturing a pipe joint of the present invention can be applied not only to the pipe joint having the structure shown in the drawings, but also to any type of pipe joint that has a bent portion.
図面はこの発明の管継手の製造方法の一実施例を示し、
第１図は切削前の断面図、１第２図は切削開始時の断面
図、第３図は切削終了時の断面図である。
１・・・管継手本体 ２・・・プラスチック製内
層３・・・屈曲部 ４・・・テーパカッター
５・・・刃The drawings show an embodiment of the method for manufacturing a pipe joint of the present invention,
FIG. 1 is a sectional view before cutting, FIG. 1 and 2 are sectional views at the start of cutting, and FIG. 3 is a sectional view at the end of cutting. 1... Pipe joint body 2... Plastic inner layer 3... Bent part 4... Taper cutter 5... Blade
Claims (1)
手の製造方法において、上記管継手内周の屈曲部に当接
する位置に保持されて回転切削するテーパカッターと、
上記管継手を保持する支持機構と、テーパカッターとこ
の支持機構とを上記屈曲部内周において得ようとしてい
る所定のＲの半径中心を回転中心として、相対的に回転
させる駆動機構とを有することを特徴とする管継手の製
造方法。1. A method for manufacturing a pipe fitting formed with a plastic inner layer having a bent portion, comprising: a taper cutter that is held at a position abutting the bent portion on the inner periphery of the pipe fitting and performs rotational cutting;
It has a support mechanism that holds the pipe joint, and a drive mechanism that rotates the taper cutter and the support mechanism relatively around a radius center of a predetermined radius to be obtained at the inner periphery of the bent portion. Features: Manufacturing method for pipe fittings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11598986A JPS62271616A (en) | 1986-05-20 | 1986-05-20 | Manufacture of pipe joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11598986A JPS62271616A (en) | 1986-05-20 | 1986-05-20 | Manufacture of pipe joint |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62271616A true JPS62271616A (en) | 1987-11-25 |
| JPH0240445B2 JPH0240445B2 (en) | 1990-09-11 |
Family
ID=14676111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11598986A Granted JPS62271616A (en) | 1986-05-20 | 1986-05-20 | Manufacture of pipe joint |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62271616A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01289611A (en) * | 1988-05-13 | 1989-11-21 | Mitsubishi Heavy Ind Ltd | Rounding machining method for bend portion in bent hole |
| JP2007030125A (en) * | 2005-07-29 | 2007-02-08 | Murata Mach Ltd | Workpiece loading system of machine tool |
| JP4491538B1 (en) * | 2009-05-22 | 2010-06-30 | 野田金型有限会社 | Manufacturing method of machined elbow |
| WO2012001761A1 (en) * | 2010-06-28 | 2012-01-05 | 野田金型有限会社 | Elbow formed by cutting and method for manufacturing same |
| CN103411077A (en) * | 2013-07-19 | 2013-11-27 | 河南联塑实业有限公司 | Plastic elbow |
| CN104338988A (en) * | 2013-07-31 | 2015-02-11 | 野田金型有限会社 | Elbow manufacturing method, cutting tool, and elbow |
| AU2015203606B2 (en) * | 2010-06-28 | 2017-02-02 | Daido Die & Mold Steel Solutions Co. Ltd. | Elbow formed by cutting and method for manufacturing same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5133390A (en) * | 1974-09-13 | 1976-03-22 | Shibamura Kikai Kigu Kk | ERUBONAIMENKENSAKUSOCHI |
-
1986
- 1986-05-20 JP JP11598986A patent/JPS62271616A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5133390A (en) * | 1974-09-13 | 1976-03-22 | Shibamura Kikai Kigu Kk | ERUBONAIMENKENSAKUSOCHI |
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01289611A (en) * | 1988-05-13 | 1989-11-21 | Mitsubishi Heavy Ind Ltd | Rounding machining method for bend portion in bent hole |
| JP2007030125A (en) * | 2005-07-29 | 2007-02-08 | Murata Mach Ltd | Workpiece loading system of machine tool |
| JP4491538B1 (en) * | 2009-05-22 | 2010-06-30 | 野田金型有限会社 | Manufacturing method of machined elbow |
| JP2010269416A (en) * | 2009-05-22 | 2010-12-02 | Noda Kanagata Kk | Manufacturing method for precut elbow |
| CN103038010B (en) * | 2010-06-28 | 2015-08-19 | 野田金型有限会社 | Cut elbow and manufacture method thereof |
| KR20160113323A (en) * | 2010-06-28 | 2016-09-28 | 노다 가나가타 유겐가이샤 | Fabricating method of material and pipe using thereof |
| JP5646623B2 (en) * | 2010-06-28 | 2014-12-24 | 野田金型有限会社 | Machined elbow and its manufacturing method |
| CN103038010A (en) * | 2010-06-28 | 2013-04-10 | 野田金型有限会社 | Elbow formed by cutting and method for manufacturing same |
| EP2586551A4 (en) * | 2010-06-28 | 2015-07-22 | Noda Kanagata Co Ltd | Elbow formed by cutting and method for manufacturing same |
| WO2012001761A1 (en) * | 2010-06-28 | 2012-01-05 | 野田金型有限会社 | Elbow formed by cutting and method for manufacturing same |
| KR20150121261A (en) * | 2010-06-28 | 2015-10-28 | 노다 가나가타 유겐가이샤 | Elbow formed by cutting and method for manufacturing same |
| EP3581305A1 (en) * | 2010-06-28 | 2019-12-18 | Daido Die & Mold Steel Solutions Co., Ltd. | Elbow formed by cutting and method for manufacturing same |
| US9227252B2 (en) | 2010-06-28 | 2016-01-05 | Noda Kanagata Co., Ltd. | Elbow formed by cutting and method for manufacturing same |
| AU2015203606B2 (en) * | 2010-06-28 | 2017-02-02 | Daido Die & Mold Steel Solutions Co. Ltd. | Elbow formed by cutting and method for manufacturing same |
| CN103411077A (en) * | 2013-07-19 | 2013-11-27 | 河南联塑实业有限公司 | Plastic elbow |
| CN104338988A (en) * | 2013-07-31 | 2015-02-11 | 野田金型有限会社 | Elbow manufacturing method, cutting tool, and elbow |
| EP3028797A4 (en) * | 2013-07-31 | 2016-07-20 | Noda Kanagata Co Ltd | Elbow manufacturing method, cutting tool, and elbow |
| US9782842B2 (en) | 2013-07-31 | 2017-10-10 | Noda Kanagata Co., Ltd. | Method of manufacturing an elbow, cutting tool, and elbow |
| EP3563954A1 (en) * | 2013-07-31 | 2019-11-06 | Daido Die & Mold Steel Solutions Co., Ltd. | Method of manufacturing an elbow and elbow |
| US20150375311A1 (en) * | 2013-07-31 | 2015-12-31 | Noda Kanagata Co., Ltd. | Method of manufacturing an elbow, cutting tool, and elbow |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0240445B2 (en) | 1990-09-11 |
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