JPH0574917B2 - - Google Patents
Info
- Publication number
- JPH0574917B2 JPH0574917B2 JP61095701A JP9570186A JPH0574917B2 JP H0574917 B2 JPH0574917 B2 JP H0574917B2 JP 61095701 A JP61095701 A JP 61095701A JP 9570186 A JP9570186 A JP 9570186A JP H0574917 B2 JPH0574917 B2 JP H0574917B2
- Authority
- JP
- Japan
- Prior art keywords
- yoke
- silicon steel
- steel plate
- outer periphery
- crucible
- 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
- 230000006698 induction Effects 0.000 claims description 20
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 13
- 230000004907 flux Effects 0.000 description 10
- 238000002844 melting Methods 0.000 description 9
- 230000008018 melting Effects 0.000 description 9
- 239000002184 metal Substances 0.000 description 9
- 229910052751 metal Inorganic materials 0.000 description 9
- 238000005266 casting Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- General Induction Heating (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
この発明は、金属溶解用の誘導炉に関し、時に
高速溶解炉に用いるのに有効な誘導炉に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention This invention relates to an induction furnace for melting metals, and sometimes to an induction furnace effective for use in a fast melting furnace.
ここでいう高速溶解炉は、１回（１チヤージと
もいう）に溶解する金属の単位重量当りの導入電
力が20kw／Kg以上であり、高速に溶解が出来る
炉を示す。 The high-speed melting furnace referred to herein refers to a furnace in which the electric power introduced per unit weight of metal melted at one time (also referred to as one charge) is 20 kw/Kg or more and can melt at high speed.
従来技術とその問題点
従来、この種の溶解炉はるつぼの外周に設けた
誘導加熱コイルの外周に継鉄を設けない構造と、
誘導加熱コイルうより発生して、るつぼ内の金属
を溶解するための磁束はコイル外部に於てはその
帰り回路が無限の空間となるものと、誘導加熱コ
イル外周に放射状に、かつ、所定間隔で継鉄を配
して溶解するための全磁の一部を吸収できるよう
にしたものの２種が挙げられる。Conventional technology and its problems Conventionally, this type of melting furnace has a structure in which a yoke is not provided on the outer periphery of the induction heating coil provided around the outer periphery of the crucible.
The magnetic flux generated from the induction heating coil and used to melt the metal in the crucible has an infinite return circuit outside the coil, and a magnetic flux that is distributed radially around the circumference of the induction heating coil at specified intervals. There are two types of magnets that are equipped with a yoke to absorb a portion of the total magnetism used for melting.
この２種の従来の溶解炉の大きな欠点は、程度
の差はあるが、炉外部に洩れた磁束によつて、近
接している吸収構造物を過熱するため、金属製構
造物は炉から遠くはなして設置するか、過熱した
熱量を水冷等の手段で冷却することが必要であつ
た。たとえば、溶解炉から直接鋳造機に注湯する
場合には、溶解炉に鋳造機を出来るだけ近ずける
必要があるが、上述の欠点があるために、金属製
構造物を遠くはなすことが出来ない場合、エネル
ギー消費を抑えたい場合には、この種の誘導炉を
用いることが出来なかつた。 The major disadvantage of these two types of conventional melting furnaces is that the magnetic flux that leaks to the outside of the furnace overheats the nearby absorbing structure, which means that the metal structures are placed far from the furnace. It was necessary to either install it in an open space, or to cool down the overheated heat using water cooling or other means. For example, when pouring metal directly from a melting furnace into a casting machine, it is necessary to move the casting machine as close as possible to the melting furnace, but due to the drawbacks mentioned above, it is not possible to move the metal structure far away. Otherwise, this type of induction furnace could not be used if energy consumption was to be reduced.
発明が解決すべき課題
この発明は炉からろうえい磁束を低減し、容易
に設置できる誘導炉を提供することを目的とする
ものである。Problems to be Solved by the Invention An object of the present invention is to provide an induction furnace that reduces the magnetic flux generated by the furnace and is easy to install.
課題を解決する手段
この発明の誘導炉は、るつぼの外周に設けた加
熱コイルの外周に、加熱コイルの外周の通電引出
部を除き、概略環状に連続している継鉄を上記る
つぼと同心状に設けてなる誘導炉であつて、上記
継鉄はその径方向寸法に等しい長さを有する厚肉
の硅素鋼鉄とこの厚肉の硅素鋼板よりも長さが短
い薄肉の珪素鋼板とからなり、厚肉の硅素鋼板と
薄肉の硅素鋼板とが並べて接着されてくさび状に
形成され、このくさび状のものを順次並べて円環
状としてなるものであることを特徴とする。Means for Solving the Problems In the induction furnace of the present invention, a yoke is provided on the outer periphery of a heating coil provided on the outer periphery of the crucible, and the yoke is continuous in an approximately annular shape except for the energized lead-out portion on the outer periphery of the heating coil, and is concentric with the crucible. The yoke is composed of a thick silicon steel plate having a length equal to the radial dimension of the yoke and a thin silicon steel plate having a shorter length than the thick silicon steel plate, It is characterized in that a thick silicon steel plate and a thin silicon steel plate are lined up and bonded to form a wedge shape, and the wedge shapes are sequentially arranged to form an annular shape.
実施例
各図において、１は耐火材で構成された適宜形
状の金属溶解用のるつぼ、２はるつぼ１の外周に
このるつぼと同心に公知の誘導炉と同様に巻回し
て設けられた誘導加熱コイル、３は誘導加熱コイ
ル２の外周にるつぼ１と同心状に設けた円筒形状
の継鉄であり、この継鉄３は誘導コイル２の外側
を覆うように通電引出部４で適宜幅で中断してい
る以外は、円周方向に概略連続的に設けられてい
る。Examples In each figure, 1 is a metal melting crucible made of refractory material and has an appropriate shape, and 2 is an induction heating device that is wound around the outer periphery of the crucible 1 concentrically with the crucible, similar to a known induction furnace. The coil 3 is a cylindrical yoke provided concentrically with the crucible 1 on the outer periphery of the induction heating coil 2. Other than that, they are provided approximately continuously in the circumferential direction.
この継鉄３は第３図に示すように、厚い板３−
１と、この厚板３−１の厚さの数分の一の厚さを
有し、かつ適宜寸法ずつ短い薄板３−２、３−３
を並べて接着してくさび形とし、このようにくさ
び形にした各板３−１、３−２、３−３が交互に
なるように並べたものである。 This yoke 3 is made of a thick plate 3-
1, and thin plates 3-2 and 3-3 having a thickness that is a fraction of the thickness of this thick plate 3-1 and shorter by appropriate dimensions.
are lined up and glued together to form a wedge shape, and the wedge-shaped plates 3-1, 3-2, and 3-3 are arranged alternately.
このようにくさび形状の板を順次並べることに
よつて円環状の継鉄とすることができる。 By sequentially arranging wedge-shaped plates in this manner, a circular yoke can be obtained.
一実施例においては厚板３−１は2.7mm、薄板
３−２、３−３は0.7mm程度の硅素鋼板等を用い
ることができる。各板の放射方向の長さl1、l2、
l3は70mm、50mm、25mm程度である。このように厚
板と薄板の硅素鋼板３−１、３−２、３−３を組
合せて円筒を形成することにより、硅素鋼板の占
積率を高めている。 In one embodiment, the thick plate 3-1 may be 2.7 mm, and the thin plates 3-2 and 3-3 may be silicon steel plates of about 0.7 mm. The radial length of each plate l 1 , l 2 ,
l 3 is about 70mm, 50mm, and 25mm. By combining the thick and thin silicon steel plates 3-1, 3-2, and 3-3 to form a cylinder in this way, the space factor of the silicon steel plates is increased.
この実施例の場合、継鉄の製作方法は板３−
１、３−２、３−３にてなるくさび形単位にまず
圧縮しながら接着して成形する。これらのくさび
形をタガの効果を持たせながら、厚円筒上に組み
合わせて継鉄とする。 In this example, the method for manufacturing the yoke is plate 3-
A wedge-shaped unit consisting of 1, 3-2, and 3-3 is first bonded and molded while being compressed. These wedge shapes are combined on a thick cylinder to create a yoke while giving the effect of a hoop.
このような構造の継鉄であれば、次の利点があ
る。 A yoke with this structure has the following advantages:
コイル外面全周に近い範囲を継鉄で覆うこと
ができるので、洩れ磁束を生じにくい特長があ
る。 Since the yoke can cover nearly the entire outer circumference of the coil, leakage magnetic flux is less likely to occur.
継鉄断面積が大きくとれるので磁束を吸収し
易く、この点からも洩れ磁束を生じにくい。 Since the yoke has a large cross-sectional area, it is easy to absorb magnetic flux, and from this point of view, leakage of magnetic flux is also less likely to occur.
上記のように構成した誘導炉においては、るつ
ぼ１内に溶解すべき金属を装入し、誘導加熱コイ
ル２に交流を印加することにより、このコイル２
から生じる交番磁束でるつぼ１内の金属は誘導加
熱され溶解する。このとき、誘導加熱コイル２の
外側にある磁束は連続した継鉄３を通るのでろう
えい磁束を低減することができる。 In the induction furnace configured as described above, the metal to be melted is charged into the crucible 1, and an alternating current is applied to the induction heating coil 2.
The metal in the crucible 1 is inductively heated and melted by the alternating magnetic flux generated from the crucible. At this time, the magnetic flux outside the induction heating coil 2 passes through the continuous yoke 3, so that the induced magnetic flux can be reduced.
発明の効果
以上詳述したように、この発明は誘導炉の加熱
コイルの外周に円周方向に概略連続した円筒形状
の継鉄を設けたので、ろうえい磁束を非常に低減
することができ、外部構造物等の不要な過熱を防
止できる。それ故、誘導炉と鋳造機とを接近して
設けることができ、誘導炉を容易に設置すること
ができる。Effects of the Invention As detailed above, in this invention, a cylindrical yoke that is approximately continuous in the circumferential direction is provided on the outer periphery of the heating coil of an induction furnace. Unnecessary overheating of structures, etc. can be prevented. Therefore, the induction furnace and the casting machine can be provided close to each other, and the induction furnace can be easily installed.
第１図はこの発明の一実施例を示す平面図、第
２図は第１図の断面図、第３図は継鉄の詳細を示
す平面図である。
１……るつぼ、２……誘導加熱コイル、３……
継鉄、４……通電引出部。
FIG. 1 is a plan view showing an embodiment of the present invention, FIG. 2 is a sectional view of FIG. 1, and FIG. 3 is a plan view showing details of the yoke. 1... Crucible, 2... Induction heating coil, 3...
Yoke, 4... Current-carrying drawer part.
Claims (1)
加熱コイルの外周の通電引出部を除き、概略環状
に連続している継鉄を上記るつぼと同心状に設け
てなる誘導炉であつて、 上記継鉄はその径方向寸法に等しい長さを有す
る厚肉の硅素鋼板とこの厚肉の硅素鋼板よりも長
さが短い薄肉の硅素鋼板とからなり、厚肉の硅素
鋼板と薄肉の硅素鋼板とが並べて接着されてくさ
び状に形成され、このくさび状のものを順次並べ
て円環状としてなるものであることを特徴とする
誘導炉。[Claims] 1. On the outer periphery of the heating coil provided on the outer periphery of the crucible,
An induction furnace comprising a generally continuous yoke concentrically with the crucible except for the energized lead-out portion on the outer periphery of the heating coil, wherein the yoke has a length equal to the radial dimension of the yoke. It consists of a thick silicon steel plate and a thin silicon steel plate whose length is shorter than the thick silicon steel plate.The thick silicon steel plate and the thin silicon steel plate are glued side by side to form a wedge. An induction furnace is characterized in that it is formed by sequentially arranging shaped pieces to form an annular shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9570186A JPS62252091A (en) | 1986-04-23 | 1986-04-23 | Induction furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9570186A JPS62252091A (en) | 1986-04-23 | 1986-04-23 | Induction furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62252091A JPS62252091A (en) | 1987-11-02 |
| JPH0574917B2 true JPH0574917B2 (en) | 1993-10-19 |
Family
ID=14144804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9570186A Granted JPS62252091A (en) | 1986-04-23 | 1986-04-23 | Induction furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62252091A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52148408A (en) * | 1976-06-05 | 1977-12-09 | Toshiba Corp | Induction melting furnace |
| JPS56147393A (en) * | 1980-04-15 | 1981-11-16 | Fuji Electric Co Ltd | Crucible induction furnace |
| JPS5844694A (en) * | 1981-09-10 | 1983-03-15 | 富士電機株式会社 | Induction furnace |
| JPS6029200U (en) * | 1983-07-30 | 1985-02-27 | 池田工業技研株式会社 | paper |
-
1986
- 1986-04-23 JP JP9570186A patent/JPS62252091A/en active Granted
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52148408A (en) * | 1976-06-05 | 1977-12-09 | Toshiba Corp | Induction melting furnace |
| JPS56147393A (en) * | 1980-04-15 | 1981-11-16 | Fuji Electric Co Ltd | Crucible induction furnace |
| JPS5844694A (en) * | 1981-09-10 | 1983-03-15 | 富士電機株式会社 | Induction furnace |
| JPS6029200U (en) * | 1983-07-30 | 1985-02-27 | 池田工業技研株式会社 | paper |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62252091A (en) | 1987-11-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |