JPH0422113U - - Google Patents
Info
- Publication number
- JPH0422113U JPH0422113U JP6419390U JP6419390U JPH0422113U JP H0422113 U JPH0422113 U JP H0422113U JP 6419390 U JP6419390 U JP 6419390U JP 6419390 U JP6419390 U JP 6419390U JP H0422113 U JPH0422113 U JP H0422113U
- Authority
- JP
- Japan
- Prior art keywords
- mandrel
- circumferential surface
- groove
- forming portion
- extrusion
- 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
- 238000001192 hot extrusion Methods 0.000 claims description 4
- 238000001125 extrusion Methods 0.000 description 3
- 230000001050 lubricating effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
Landscapes
- Extrusion Of Metal (AREA)
Description
第１図は本考案の熱間押出用マンドレルを示す
説明図で、ａは全体図、ｂは部分拡大図、第２図
ａはマンドレルに設けた溝の拡大図、第２図ｂは
、第２図ａの部分拡大図、第３図は本考案の熱間
押出用マンドレルの他の例を示す説明図、第４図
は熱間押出による継目無管押出中の断面図、第５
図は実施例における押出比とマンドレル寿命の関
係を示す図表である。
１……本考案のマンドレル、１Ａ……成形部、
１Ｂ……ステツプ部、１Ｃ……ネジ部、２Ａ……
溝（周面を一周）、２Ｂ……溝（螺旋状）、３…
…押出管、４……ダイス、５……従来のマンドレ
ル、５Ａ……成形部、５Ｂ……ステツプ部、５Ｃ
……ネジ部、６……ビレツト、７……ビレツトの
外面潤滑膜、８……ビレツトの内面潤滑膜。
Fig. 1 is an explanatory view showing the hot extrusion mandrel of the present invention, in which a is an overall view, b is a partially enlarged view, Fig. 2a is an enlarged view of the grooves provided in the mandrel, and Fig. 2b is an enlarged view of a groove provided in the mandrel. FIG. 3 is an explanatory diagram showing another example of the hot extrusion mandrel of the present invention, FIG. 4 is a cross-sectional view during seamless tube extrusion by hot extrusion, and FIG. 5 is a partially enlarged view of FIG.
The figure is a chart showing the relationship between extrusion ratio and mandrel life in Examples. 1... Mandrel of the present invention, 1A... Molding part,
1B...Step part, 1C...Thread part, 2A...
Groove (circumferential surface), 2B...Groove (spiral), 3...
...Extrusion tube, 4...Dice, 5...Conventional mandrel, 5A...Forming part, 5B...Step part, 5C
. . . threaded portion, 6 . . . billet, 7 . . . outer lubricating film of billet, 8 . . . inner lubricating film of billet.
Claims (1)
一周以上する溝を設けたことを特徴とする継目無
管熱間押出用マンドレル。 1. A mandrel for hot extrusion of seamless pipes, characterized in that a groove is provided on the circumferential surface of the forming portion of the mandrel, extending one or more times around the circumferential surface of the forming portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990064193U JPH084164Y2 (en) | 1990-06-18 | 1990-06-18 | Seamless steel pipe hot extrusion mandrel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990064193U JPH084164Y2 (en) | 1990-06-18 | 1990-06-18 | Seamless steel pipe hot extrusion mandrel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0422113U true JPH0422113U (en) | 1992-02-24 |
| JPH084164Y2 JPH084164Y2 (en) | 1996-02-07 |
Family
ID=31594913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990064193U Expired - Lifetime JPH084164Y2 (en) | 1990-06-18 | 1990-06-18 | Seamless steel pipe hot extrusion mandrel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH084164Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60176811U (en) * | 1984-04-28 | 1985-11-22 | 日本軽金属株式会社 | Extrusion machine mandrel device |
-
1990
- 1990-06-18 JP JP1990064193U patent/JPH084164Y2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60176811U (en) * | 1984-04-28 | 1985-11-22 | 日本軽金属株式会社 | Extrusion machine mandrel device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH084164Y2 (en) | 1996-02-07 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |