JP3391637B2 - Ball mandrel for pipe bending equipment - Google Patents
Ball mandrel for pipe bending equipmentInfo
- Publication number
- JP3391637B2 JP3391637B2 JP21197196A JP21197196A JP3391637B2 JP 3391637 B2 JP3391637 B2 JP 3391637B2 JP 21197196 A JP21197196 A JP 21197196A JP 21197196 A JP21197196 A JP 21197196A JP 3391637 B2 JP3391637 B2 JP 3391637B2
- Authority
- JP
- Japan
- Prior art keywords
- mandrel
- pipe
- pipe bending
- ball
- disk member
- 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.)
- Expired - Lifetime
Links
Description
【発明の詳細な説明】
【０００１】
【産業上の利用分野】この発明はパイプ曲げ装置用ボー
ルマンドレルに関し、パイプ曲げの際にパイプ材に挿入
されて適正なパイプ曲げを行うために使用されるもので
ある。
【０００２】
【従来の技術】従来におけるこの種のパイプ曲げ装置用
ボールマンドレルＭは、図３に示すように、マンドレル
本体１０の先端面に円盤部材２０が揺動可能に連結さ
れ、この円盤部材２０がパイプ曲げの際にパイプ材と共
に曲げ型に巻きついていた。
【０００３】
【発明が解決しようとする課題】しかしながら、かかる
従来のパイプ曲げ装置用ボールマンドレルにあっては、
図４に示すように、パイプ材Ｐが曲げ加工される際にそ
の内側面に生ずる増肉部３０が、マンドレルＭの円盤部
材２０の端縁を押し上げるためパイプ材Ｐが不適正に変
形しやすいという不都合を有した。特に、かかる不都合
は、極小曲げ加工又は薄肉パイプ材の曲げ加工において
顕著であった。更に、前記増肉部３０が前記円盤部材
（マンドレルＭの）２０の端縁を押し上げるため前記円
盤部材２０とマンドレル本体１０との連結部４０に負担
がかかり、この結果、当該連結部４０が破損しやすいと
いう不都合をも有した。
【０００４】この発明の課題はかかる不都合を解消する
ことである。
【０００５】
【課題を解決するための手段】前記課題を達成するため
に、この発明に係るパイプ曲げ装置用ボールマンドレル
においては、マンドレル本体の先端面に円盤部材が揺動
可能に連結されているパイプ曲げ装置用ボールマンドレ
ルにおいて、前記円盤部材の側面における前記マンドレ
ル本体側の周縁に環状凹部を形成したため、パイプ材が
曲げ加工される際にその内側面に生ずる増肉部は、マン
ドレルの円盤部材の環状凹部に収容される結果当該円盤
部材を押し上げることはないものである。
【０００６】
【発明の実施の態様】図１において、Ｍはパイプ曲げ装
置用ボールマンドレルであり、パイプ曲げの際にパイプ
材に挿入されるものである。このボールマンドレルＭ
は、マンドレル本体１０の先端面に第一円盤部材５０が
ボールジョイント（この発明の「連結部」）４０を介し
て連結され、且つ、この第一円盤部材５０の前面に第二
円盤部材６０がボールジョイント（この発明の「連結
部」）４１を介して連結されたものである。このため、
このボールマンドレルＭはパイプ曲げの際に後記パイプ
材Ｐとともに曲げ型（図示せず）に沿って巻きつくこと
ができる。
【０００７】５１は環状凹部であり、前記第一円盤部材
５０の側面における前記マンドレル本体１０側の周縁に
形成されている。このため図２に示すように、パイプ材
Ｐが曲げ加工される際にその内側面に増肉部３０が発生
しても、この増肉部３０は前記第一円盤部材５０の環状
凹部５１に収容される結果、従来のように、第一円盤部
材５０を押し上げることはないものである。
【０００８】
【発明の効果】この発明に係るパイプ曲げ装置用ボール
マンドレルは、マンドレル本体の先端面に円盤部材が揺
動可能に連結されているパイプ曲げ装置用ボールマンド
レルにおいて、前記円盤部材の側面における前記マンド
レル本体側周縁に環状凹部を形成したため、パイプ材が
曲げ加工される際にその内側面に生ずる増肉部は、マン
ドレルの円盤部材の環状凹部に収容される結果当該円盤
部材を押し上げることはないものである。
【０００９】よって、このパイプ曲げ装置用ボールマン
ドレルを使用すれば、パイプ曲げの最中にパイプ材が適
正に変形しやすく、特に、極小曲げ加工又は薄肉パイプ
材を適正に曲げ加工においてこの効果は顕著に表れるも
のである。更に、前記増肉部が前記円盤部（マンドレル
の）の端縁を押し上げることはないため、前記円盤部と
マンドレル本体との連結部には従来のように負担がかか
ることはなく、この結果、当該連結部、ひいては、ボー
ルマンドレルの耐久性は向上するものである。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ball mandrel for a pipe bending apparatus, which is used to insert a pipe into a pipe material at the time of bending a pipe to perform proper pipe bending. Things. 2. Description of the Related Art As shown in FIG. 3, a conventional ball mandrel M for a pipe bending apparatus has a disk member 20 which is swingably connected to a distal end surface of a mandrel main body 10 as shown in FIG. 20 was wound around a bending mold together with the pipe material at the time of pipe bending. However, in such a conventional ball mandrel for a pipe bending apparatus,
As shown in FIG. 4, when the pipe material P is bent, the thickened portion 30 generated on the inner surface pushes up the edge of the disc member 20 of the mandrel M, so that the pipe material P is easily deformed improperly. Had the inconvenience. In particular, such an inconvenience was remarkable in the extremely small bending process or the bending process of a thin pipe material. Further, since the thickened portion 30 pushes up the edge of the disc member (of the mandrel M) 20, a load is applied to the connecting portion 40 between the disc member 20 and the mandrel main body 10, and as a result, the connecting portion 40 is damaged. It also had the disadvantage of being easy to do. An object of the present invention is to eliminate such inconvenience. In order to achieve the above object, in a ball mandrel for a pipe bending apparatus according to the present invention, a disk member is swingably connected to a tip end surface of a mandrel main body. In the ball mandrel for a pipe bending device, since an annular concave portion is formed on the peripheral edge of the side of the disk member on the side of the mandrel main body, when the pipe material is bent, the thickened portion formed on the inner surface thereof is a disk member of the mandrel. The disk member is not pushed up as a result of being accommodated in the annular concave portion. FIG. 1 shows a ball mandrel M for a pipe bending apparatus, which is inserted into a pipe material when bending a pipe. This ball mandrel M
The first disk member 50 is connected to the distal end surface of the mandrel main body 10 via a ball joint (the “connection portion” of the present invention) 40, and the second disk member 60 is provided on the front surface of the first disk member 50. It is connected via a ball joint (“connection portion” of the present invention) 41. For this reason,
The ball mandrel M can be wound together with a pipe material P described later along a bending mold (not shown) at the time of pipe bending. Reference numeral 51 denotes an annular concave portion, which is formed on the side of the first disk member 50 at the periphery of the mandrel body 10 . For this reason, as shown in FIG. 2, even if the thickened portion 30 is generated on the inner surface when the pipe material P is bent, the thickened portion 30 is formed in the annular concave portion 51 of the first disk member 50. As a result, the first disk member 50 is not pushed up as in the related art. A ball mandrel for a pipe bending apparatus according to the present invention is a ball mandrel for a pipe bending apparatus in which a disc member is swingably connected to a tip end surface of a mandrel body. Since the annular concave portion is formed on the peripheral edge of the mandrel body side, the thickened portion generated on the inner surface when the pipe material is bent is housed in the annular concave portion of the disk member of the mandrel, and as a result, the disk member is pushed up. Is not something. Therefore, if this ball mandrel for a pipe bending apparatus is used, the pipe material is easily deformed properly during the bending of the pipe. In particular, this effect is obtained when the extremely small bending process or the thin pipe material is properly bent. It is noticeable. Further, since the thickened portion does not push up the edge of the disk portion (of the mandrel), the connecting portion between the disk portion and the mandrel main body is not burdened as in the related art, and as a result, The durability of the connecting portion, and thus the ball mandrel, is improved.
【図面の簡単な説明】
【図１】この発明に係るパイプ曲げ装置用ボールマンド
レルの正面図である。
【図２】同使用状態を示した部分断面図である。
【図３】図１に相当する従来例の図である。
【図４】図２に相当する従来例の図である。
【符号の説明】
１０ … マンドレル本体
５０ … 第一円盤部材（円盤部材）
Ｍ … パイプ曲げ装置用ボールマンドレル
５１ … 環状凹部BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of a ball mandrel for a pipe bending apparatus according to the present invention. FIG. 2 is a partial cross-sectional view showing the same use state. FIG. 3 is a diagram of a conventional example corresponding to FIG. 1; FIG. 4 is a diagram of a conventional example corresponding to FIG. 2; [Description of Signs] 10… Mandrel main body 50… First disk member (disk member) M… Ball mandrel 51 for pipe bending device… Annular recess
フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) B21D 9/03 B21D 9/01 Continuation of front page (58) Field surveyed (Int.Cl. 7 , DB name) B21D 9/03 B21D 9/01
Claims (1)
動可能に連結されているパイプ曲げ装置用ボールマンド
レルにおいて、前記円盤部材の側面における前記マンド
レル本体側の周縁に環状凹部を形成したことを特徴とす
るパイプ曲げ装置用ボールマンドレル。(57) [Claim 1] In a ball mandrel for a pipe bending apparatus in which a disk member is swingably connected to a tip end surface of a mandrel main body, a side of the mandrel main body on a side surface of the disk member is provided. A ball mandrel for a pipe bending device, wherein an annular concave portion is formed on a peripheral edge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21197196A JP3391637B2 (en) | 1996-07-22 | 1996-07-22 | Ball mandrel for pipe bending equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21197196A JP3391637B2 (en) | 1996-07-22 | 1996-07-22 | Ball mandrel for pipe bending equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1034247A JPH1034247A (en) | 1998-02-10 |
| JP3391637B2 true JP3391637B2 (en) | 2003-03-31 |
Family
ID=16614749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21197196A Expired - Lifetime JP3391637B2 (en) | 1996-07-22 | 1996-07-22 | Ball mandrel for pipe bending equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3391637B2 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1774620B1 (en) | 2004-06-23 | 2014-10-01 | Peregrine Semiconductor Corporation | Integrated rf front end |
| US20080076371A1 (en) | 2005-07-11 | 2008-03-27 | Alexander Dribinsky | Circuit and method for controlling charge injection in radio frequency switches |
| US7890891B2 (en) | 2005-07-11 | 2011-02-15 | Peregrine Semiconductor Corporation | Method and apparatus improving gate oxide reliability by controlling accumulated charge |
| CN104707884B (en) * | 2015-02-04 | 2018-03-09 | 西北工业大学 | A kind of monoblock type flexible core mold for thin-walled rectangular tube rotary draw bending |
| US10886911B2 (en) | 2018-03-28 | 2021-01-05 | Psemi Corporation | Stacked FET switch bias ladders |
| JP7078599B2 (en) | 2019-12-18 | 2022-05-31 | フタバ産業株式会社 | Curved tube manufacturing equipment and curved tube manufacturing method |
| JP7036859B2 (en) * | 2020-04-13 | 2022-03-15 | フタバ産業株式会社 | Curved tube manufacturing equipment and curved tube manufacturing method |
| JP7181268B2 (en) * | 2020-11-16 | 2022-11-30 | フタバ産業株式会社 | Bent pipe manufacturing device and bending pipe manufacturing method |
-
1996
- 1996-07-22 JP JP21197196A patent/JP3391637B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH1034247A (en) | 1998-02-10 |
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