JP2882448B2 - Centrifugal casting metal frame - Google Patents
Centrifugal casting metal frameInfo
- Publication number
- JP2882448B2 JP2882448B2 JP25269793A JP25269793A JP2882448B2 JP 2882448 B2 JP2882448 B2 JP 2882448B2 JP 25269793 A JP25269793 A JP 25269793A JP 25269793 A JP25269793 A JP 25269793A JP 2882448 B2 JP2882448 B2 JP 2882448B2
- Authority
- JP
- Japan
- Prior art keywords
- metal frame
- cooling
- casting
- sleeve
- water
- 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 - Fee Related
Links
Landscapes
- Continuous Casting (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は遠心力鋳造用金枠に関
し、特に小径の鋳鉄管の鋳造に使用される水冷式の遠心
力鋳造用金枠に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a centrifugal casting frame, and more particularly to a water-cooled centrifugal casting frame used for casting small-diameter cast iron tubes.
【０００２】[0002]
【従来の技術】従来の小径管の鋳造に適用されている水
冷式の遠心力鋳造用金枠は、図３に示すように、円筒状
の鋼製の金枠１１にスリーブ１２を外ばめして、金枠１
１とスリーブ１２の間に水冷ジャケット１３を形成して
いる。この水冷ジャケット１３を形成するために、スリ
ーブ１２の周方向及び軸心方向に適当間隔おきにセット
ボルト１４を配置し、このセットボルト１４をスリーブ
１２の径方向に貫通状態でねじ合わせ、その先端を金枠
１１の外周面に接触させることによって、スリーブ１２
を金枠１１に対し同心状に保持している。2. Description of the Related Art As shown in FIG. 3, a water-cooled centrifugal force casting metal frame applied to the casting of a conventional small-diameter pipe has a sleeve 12 fitted on a cylindrical steel metal frame 11, as shown in FIG. And gold frame 1
A water cooling jacket 13 is formed between the sleeve 1 and the sleeve 12. In order to form this water-cooled jacket 13, set bolts 14 are arranged at appropriate intervals in the circumferential direction and axial direction of the sleeve 12, and the set bolts 14 are screwed in the radial direction of the sleeve 12 in a threaded manner. Is brought into contact with the outer peripheral surface of the metal frame 11 so that the sleeve 12
Are held concentrically with respect to the metal frame 11.
【０００３】[0003]
【発明が解決しようとする課題】このような構成におい
て、鋳型を構成する金枠１１の内周面に塗型を施した後
に、金枠１１をスリーブ１２とともに回転させながらそ
の内部に溶湯を注湯して冷却凝固させることにより、鋳
造が行われる。ところで、溶湯を金枠１１内に注湯して
から、凝固した鋳造管が引き抜き可能になるまでの時間
は、直径２００mmの鋳造管で約２０秒程度である。この
時間は冷却回転時間と呼び、鋳造サイクルタイムに占め
る割合は約１／４と大きい。In such a configuration, after the inner peripheral surface of the metal frame 11 constituting the mold is coated, the molten metal is poured into the metal frame 11 while rotating the metal frame 11 together with the sleeve 12. Casting is performed by heating and cooling and solidifying. By the way, the time from pouring the molten metal into the metal frame 11 until the solidified casting tube can be pulled out is about 20 seconds for a casting tube having a diameter of 200 mm. This time is called the cooling rotation time, and its ratio to the casting cycle time is as large as about 1/4.
【０００４】したがって、この冷却回転時間の短縮化を
図ると鋳造管の製造の生産性を高めることができるが、
そのためには冷却速度を高める必要がある。そこで、冷
却水の流量を増加することも考えられるが、単に冷却水
の流量を増加しただけでは冷却能力の向上には殆ど効果
を発揮せず、冷却速度を高めて冷却回転時間を短縮化す
ることで生産性を高めることはできないという問題があ
った。[0004] Therefore, if the cooling rotation time is shortened, the productivity of the production of the cast pipe can be increased.
For that purpose, it is necessary to increase the cooling rate. Therefore, it is conceivable to increase the flow rate of the cooling water, but merely increasing the flow rate of the cooling water has little effect on the improvement of the cooling capacity, and increases the cooling speed to shorten the cooling rotation time. Therefore, there was a problem that productivity could not be increased.
【０００５】また、このような構成において鋳造作業を
ランニング状態で続けた際に、金枠が蓄熱して冷却能力
が追い付かなくなることがあり、この場合には凝固速度
が遅くなって鋳造した鉄管の外面にピンホールの欠陥な
どが発生するという問題があった。In such a configuration, when the casting operation is continued in a running state, the heat capacity of the metal frame may not be able to keep up with the cooling of the metal frame. There is a problem that pinhole defects and the like occur on the outer surface.
【０００６】本発明はこのような問題を解決するもの
で、溶湯の冷却速度を高めて冷却回転時間を短縮し、生
産性を向上できるとともに鋳造管の外面にピンホールの
欠陥などが発生することのない遠心鋳造用金枠を提供す
ることを目的とする。SUMMARY OF THE INVENTION The present invention solves such a problem, and can increase the cooling speed of the molten metal to shorten the cooling rotation time, improve the productivity, and generate defects such as pinholes on the outer surface of the casting tube. It is an object of the present invention to provide a metal frame for centrifugal casting that does not have any.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するため
に本発明は、円筒状の金枠にスリーブを外ばめして、こ
の金枠とスリーブとの間に水冷ジャケットを設けた遠心
力鋳造用金枠において、前記金枠の外周面に複数の凹部
または複数の凸部の少なくとも一方を金枠の周方向およ
び軸心方向に間隔をあけて縦横に形成したものである。According to the present invention, there is provided a centrifugal casting apparatus comprising: a sleeve fitted to a cylindrical metal frame; and a water cooling jacket provided between the metal frame and the sleeve. In the metal frame, at least one of a plurality of concave portions or a plurality of convex portions is formed on an outer peripheral surface of the metal frame vertically and horizontally at intervals in a circumferential direction and an axial direction of the metal frame.
【０００８】[0008]
【作用】このようなものであると、金枠の外周面に形成
した凹部または凸部によって、水冷ジャケットに流入し
た冷却水が乱流状態となって積極的に金枠に接触すると
ともに、冷却水と金枠との接触表面積が増加するため、
冷却能力が向上する。この結果、溶湯の冷却速度が高く
なって、冷却回転時間が短縮される。また、鋳造作業を
ランニング状態で続けた際でも、金枠が蓄熱されること
がなくなって、鋳造管外面のピンホールの発生が防止さ
れる。According to this structure, the cooling water flowing into the water-cooling jacket is turbulently formed by the concave or convex portions formed on the outer peripheral surface of the metal frame and actively contacts the metal frame, and the cooling water is cooled. Because the contact surface area of water and metal frame increases,
Cooling capacity is improved. As a result, the cooling speed of the molten metal increases, and the cooling rotation time is shortened. Further, even when the casting operation is continued in the running state, the heat of the metal frame is not stored, and the occurrence of pinholes on the outer surface of the casting tube is prevented.
【０００９】[0009]
【実施例】図１は、本発明の一実施例の遠心力鋳造用金
枠を示す。ここで１は円筒状の鋼製の金枠であり、その
外側にスリーブ２が外ばめされ、金枠１とスリーブ２の
間に、冷却水を通すための水冷ジャケット３が形成され
ている。FIG. 1 shows a metal frame for centrifugal casting according to an embodiment of the present invention. Here, reference numeral 1 denotes a cylindrical steel frame, a sleeve 2 is fitted on the outside thereof, and a water cooling jacket 3 for passing cooling water is formed between the metal frame 1 and the sleeve 2. .
【００１０】図２に示すように、金枠１の外周面には、
複数の凹部４がピーニングにより形成されており、たと
えば直径ｄが１５mmの凹部４が２５mmのピッチＰ間隔で
金枠１の周方向及び軸心方向に縦横に形成されている。
なお、図１においてはこれらの凹部４を強調拡大して図
示している。As shown in FIG. 2, on the outer peripheral surface of the metal frame 1,
The plurality of recesses 4 are formed by peening. For example, the recesses 4 having a diameter d of 15 mm are formed vertically and horizontally in the circumferential direction and the axial direction of the metal frame 1 at a pitch P of 25 mm.
In FIG. 1, these recesses 4 are shown in an enlarged scale.
【００１１】スリーブ２の周方向及び軸心方向に適当間
隔おきに配置されたセットボルト５が、このスリーブ２
の壁を径方向に貫通してねじ合わされており、その先端
が、金枠１の外周面に接している。これにより、水冷ジ
ャケット３を形成するためのスリーブ２が金枠１と同心
状に保持される。The set bolts 5 arranged at appropriate intervals in the circumferential direction and the axial direction of the sleeve 2
Are screwed through the wall in the radial direction, and the tip thereof is in contact with the outer peripheral surface of the metal frame 1. Thereby, the sleeve 2 for forming the water cooling jacket 3 is held concentrically with the metal frame 1.
【００１２】このような構成において、鋳造管の製造時
には、金枠１の内周面に塗型を施し、この金枠１の受口
部１ａ側に受口形成中子６を配置し、金枠１の挿口１ｂ
側にストッパリング７を配置した後、金枠１を回転させ
ながらその内部に溶湯８を注湯するとともに、水冷ジャ
ケット３に冷却水９を流入させる。In such a configuration, at the time of manufacturing a cast tube, a mold is applied to the inner peripheral surface of the metal frame 1, and a socket forming core 6 is arranged on the socket 1 a side of the metal frame 1. Insert 1b of frame 1
After disposing the stopper ring 7 on the side, the molten metal 8 is poured into the metal frame 1 while rotating the metal frame 1, and the cooling water 9 flows into the water cooling jacket 3.
【００１３】この場合に、金枠１の外周面には複数の凹
部４が形成されているため、水冷ジャケット３に流入し
た冷却水９が凹部４に当接して乱流状態となって積極的
に金枠１に接触するとともに、凹部４によって冷却水９
と金枠１との接触表面積が増加することとなり、冷却能
力が向上する。この結果、溶湯８の熱が水冷ジャケット
３内を流れる冷却水９にて効果的に奪われるため、溶湯
８が速やかに冷却凝固して鋳造管が形成される。この凝
固した鋳造管は、その後に引き抜かれる。In this case, since the plurality of recesses 4 are formed on the outer peripheral surface of the metal frame 1, the cooling water 9 flowing into the water-cooling jacket 3 comes into contact with the recesses 4 to form a turbulent state, which is positive. And the cooling water 9 by the recess 4
The contact surface area between the metal frame 1 and the metal frame 1 increases, and the cooling capacity is improved. As a result, since the heat of the molten metal 8 is effectively removed by the cooling water 9 flowing in the water cooling jacket 3, the molten metal 8 is rapidly cooled and solidified to form a casting tube. The solidified casting tube is subsequently drawn.
【００１４】このように溶湯８が速やかに冷却凝固され
るため、溶湯８を金枠１内に注湯してから凝固した鋳造
管が引き抜き可能になるまでの冷却回転時間を短縮で
き、鋳造管の生産性を向上できる。Since the molten metal 8 is rapidly cooled and solidified as described above, the cooling rotation time from the pouring of the molten metal 8 into the metal frame 1 until the solidified casting pipe can be pulled out can be shortened. Productivity can be improved.
【００１５】また、鋳造作業をランニング状態で続けた
際でも、金枠１が蓄熱されることがなくなって、鋳造管
外面のピンホールの発生が防止され、鋳造管の品質を向
上できる。Further, even when the casting operation is continued in the running state, the heat of the metal frame 1 is not stored, and the occurrence of pinholes on the outer surface of the casting tube is prevented, so that the quality of the casting tube can be improved.
【００１６】なお、上記実施例においては、金枠１の外
周面に複数の凹部４を形成した場合について説明した
が、凹部４の代わりに凸部を形成したり、凹部および凸
部を形成しても同様の効果を得ることができる。また、
上記実施例においては、凹部４をピーニングにより形成
した場合について説明したが、ピーニングによる形成に
限るものではなく、ショットブラストやショットピーニ
ングにより金枠１の外周面に凹凸部を形成してもよく、
この場合には、凹凸部の形成と同時にさびを除去できる
ため、さらに冷却能力が向上する利点を有する。In the above embodiment, the case where a plurality of recesses 4 are formed on the outer peripheral surface of the metal frame 1 has been described. The same effect can be obtained. Also,
In the above embodiment, the case where the recess 4 is formed by peening has been described. However, the present invention is not limited to the formation by peening, and the uneven portion may be formed on the outer peripheral surface of the metal frame 1 by shot blasting or shot peening.
In this case, since the rust can be removed simultaneously with the formation of the uneven portion, there is an advantage that the cooling capacity is further improved.
【００１７】[0017]
【発明の効果】以上述べたように本発明によれば、金枠
の外周面に複数の凹部または複数の凸部の少なくとも一
方を金枠の周方向および軸心方向に間隔をあけて縦横に
形成したため、溶湯の冷却速度が高められ、冷却回転時
間を大幅に短縮できて生産性を向上でき、かつ金枠冷却
不足によるピンホールの発生を防止でき、また鋳造管の
収縮量も大きくなるので引き抜きも容易になり、さらに
金枠の長寿命化も図ることができる。As described above, according to the present invention, at least one of the plurality of concave portions or the plurality of convex portions is formed on the outer peripheral surface of the metal frame vertically and horizontally at intervals in the circumferential direction and the axial direction of the metal frame. As a result, the cooling rate of the molten metal is increased, the cooling rotation time can be significantly reduced, productivity can be improved, and pinholes due to insufficient cooling of the metal frame can be prevented, and the shrinkage of the casting tube also increases. Pull-out becomes easy, and the life of the metal frame can be extended.
【図１】本発明の一実施例の遠心力鋳造用金枠の縦断面
図である。FIG. 1 is a longitudinal sectional view of a metal frame for centrifugal casting according to one embodiment of the present invention.
【図２】（ａ）および（ｂ）は同遠心力鋳造用金枠の拡
大平面図および拡大縦断面図である。FIGS. 2A and 2B are an enlarged plan view and an enlarged longitudinal sectional view of the centrifugal force casting metal frame.
【図３】従来の遠心力鋳造用金枠の縦断面図である。FIG. 3 is a longitudinal sectional view of a conventional centrifugal casting metal frame.
１ 金枠 ２ スリーブ ３ 水冷ジャケット ４ 凹部 ５ セットボルト ９ 冷却水 DESCRIPTION OF SYMBOLS 1 Metal frame 2 Sleeve 3 Water cooling jacket 4 Depression 5 Set bolt 9 Cooling water
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) B22D 13/10 ──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. 6 , DB name) B22D 13/10
Claims (1)
この金枠とスリーブとの間に水冷ジャケットを設けた遠
心力鋳造用金枠であって、前記金枠の外周面に複数の凹
部または複数の凸部の少なくとも一方が金枠の周方向お
よび軸心方向に間隔をあけて縦横に形成されていること
を特徴とする遠心力鋳造用金枠。1. A sleeve is fitted on a cylindrical metal frame,
A centrifugal casting metal frame provided with a water cooling jacket between the metal frame and the sleeve, wherein at least one of a plurality of concave portions or a plurality of convex portions is formed on the outer peripheral surface of the metal frame. Circumferential direction
And a centrifugal casting metal frame which is formed vertically and horizontally at an interval in the axial direction .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25269793A JP2882448B2 (en) | 1993-10-08 | 1993-10-08 | Centrifugal casting metal frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25269793A JP2882448B2 (en) | 1993-10-08 | 1993-10-08 | Centrifugal casting metal frame |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07108362A JPH07108362A (en) | 1995-04-25 |
| JP2882448B2 true JP2882448B2 (en) | 1999-04-12 |
Family
ID=17240998
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25269793A Expired - Fee Related JP2882448B2 (en) | 1993-10-08 | 1993-10-08 | Centrifugal casting metal frame |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2882448B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104525891A (en) * | 2014-11-28 | 2015-04-22 | 沈阳亚特重型装备制造有限公司 | Water cooled centrifugal machine of pipe die sleeve applied to long tube drawing/heating grating system |
-
1993
- 1993-10-08 JP JP25269793A patent/JP2882448B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104525891A (en) * | 2014-11-28 | 2015-04-22 | 沈阳亚特重型装备制造有限公司 | Water cooled centrifugal machine of pipe die sleeve applied to long tube drawing/heating grating system |
| CN104525891B (en) * | 2014-11-28 | 2017-02-22 | 沈阳亚特重型装备制造有限公司 | Water cooled centrifugal machine of pipe die sleeve applied to long tube drawing/heating grating system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07108362A (en) | 1995-04-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |