JPH04154078A

JPH04154078A - Induction heater coil device

Info

Publication number: JPH04154078A
Application number: JP27655090A
Authority: JP
Inventors: Mitsumasa Tsukada; 塚田　光政
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 1990-10-17
Filing date: 1990-10-17
Publication date: 1992-05-27
Anticipated expiration: 2014-12-27
Also published as: JP2994018B2

Abstract

PURPOSE:To highly efficiently induction-heat an edge part of a slab material by surrounding the edge part of the slab material in an E-shape by an iron core. CONSTITUTION:An edge part of a slab material 1 is surrounded by an iron core 2 of shape in which opposed sides 2b are formed in point ends of E-shaped upper and lower sides 2a, and windings 3, wound on the periphery of protruded parts of the iron core 2 to apply an AC current, is provided. When the AC current is allowed to flow in the winding 3, magnetic fluxes 6, 7 are generated. That is, the magnetic fluxes 6, 7, for induction-heating the edge part of the slab material 1 by the iron core 2 of shape formed with the opposed sides 2b in the point ends of the E-shaped upper and lower sides 2a, pass through the iron core 2. In this way, the edge part of the slab material 1 can be heated at high heating efficiency.

Description

【発明の詳細な説明】［産業上の利用分野］この発明は、スラブ材のエツジ部等を局部的に誘導加熱
するための鉄心付き誘導加熱コイル装置に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an induction heating coil device with an iron core for locally inductively heating the edges of a slab material.

［従来の技術］第４図は、例えば特公昭６１−３９７１８号公報に記載
された従来のスラブ材のエツジ部を局部的に誘導加熱す
る誘導加熱コイル装置の使用状態を示す正面図（ａ）と
側面図（ｂ）である。図において、（１）はスラブ材、
（３）は巻線、（４）は交流電源、（８）は加熱パター
ン、（９）はＥ型鉄心である。また、（１０）は正面側
から見た磁束、（１１）および（１２）は側面側から見
た磁束を表わしている。[Prior Art] FIG. 4 is a front view (a) showing a state in which a conventional induction heating coil device for locally inductively heating the edge portion of a slab material is described in, for example, Japanese Patent Publication No. 61-39718. and a side view (b). In the figure, (1) is a slab material,
(3) is a winding, (4) is an AC power supply, (8) is a heating pattern, and (9) is an E-type iron core. Further, (10) represents the magnetic flux viewed from the front side, and (11) and (12) represent the magnetic flux viewed from the side side.

次に動作について説明する０巻線り３）を有する鉄心（
９）はスラブ材（１）のエツジ部の上部、側部、下部の
三方向に配置され、スラブ材（１）は矢印の方向に送ら
れ、スラブ材のエツジ部は加熱パターン（８）のように
誘導加熱される。Next, we will explain the operation of the iron core (
9) are arranged in three directions: the top, side, and bottom of the edge part of the slab material (1), the slab material (1) is fed in the direction of the arrow, and the edge part of the slab material is placed in the heating pattern (8). It is heated by induction.

誘導加熱コイルは、Ｅ型鉄心（９）に巻線（３）を巻付
け、交流電源（４）に接続されている０巻線（３）に交
流電流が流れると、磁束が発生する。正面図（ａ）側か
ら見ると磁束は（１０）のように発生し、側断面図（ｂ
）から見ると（１１）および（１２）のように磁束が発
生する。上記磁束によりスラブ材（１）のエツジ部は誘
導加熱され、斜線部の加熱パターン（８）が得られる。In the induction heating coil, a winding (3) is wound around an E-type iron core (9), and when an alternating current flows through the zero winding (3) connected to an alternating current power source (4), magnetic flux is generated. When viewed from the front view (a) side, the magnetic flux is generated as shown in (10), and when viewed from the side sectional view (b), the magnetic flux is generated as shown in (10).
), magnetic flux is generated as shown in (11) and (12). The edge portion of the slab material (1) is inductively heated by the magnetic flux, and a heating pattern (8) of the diagonal line portion is obtained.

［発明が解決しようとする課題］従来の誘導加熱コイル装置は、第４図（ｂ）に示す磁束
（１１）がスラブ材のエツジ部を加熱するのに最も有効
に使用される磁束であるが、上部誘導加熱コイルと側部
誘導加熱コイルに渡る部分および側部誘導加熱コイルか
ら下部誘導加熱コイルへ渡る部分で、磁束が空中を通る
なめ、スラブ材の工・ジを加熱する誘導加熱効率が４５
〜５０％に過ぎないという問題点があった。[Problems to be Solved by the Invention] In the conventional induction heating coil device, the magnetic flux (11) shown in FIG. 4(b) is the magnetic flux most effectively used to heat the edge portion of the slab material. The magnetic flux passes through the air in the part where it crosses between the upper induction heating coil and the side induction heating coil, and the part where it crosses from the side induction heating coil to the lower induction heating coil, increasing the efficiency of induction heating to heat the slab material. 45
There was a problem that it was only ~50%.

この発明は上記のような課題を解決するためになされた
もので、スラブ材のエツジ部を高効率で誘導加熱するこ
とができる誘導加熱コイル装置を得ることを目的とする
。The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to obtain an induction heating coil device that can inductively heat the edge portion of a slab material with high efficiency.

［課題を解決するための手段］この発明に係る誘導加熱コイル装置は、Ｅ字の上、下辺
先端に対向辺が形成された形状の鉄心によりスラブ材の
エツジ部分を囲み、この鉄心の３箇所の突部のうち少な
くとも２ａ１所の突部の周囲に巻回され交番電流を印加
される巻線を備えている。[Means for Solving the Problems] An induction heating coil device according to the present invention surrounds the edge portion of a slab material with an iron core having a shape in which opposing sides are formed at the top and bottom ends of the letter E, and It is provided with a winding wound around at least 2a1 of the protrusions and to which an alternating current is applied.

［作　用］この発明においては、スラブ材のエツジ部分を鉄心によ
り形状に囲むことにより、スラブ材のエツジ部分を誘導
加熱する磁束がほとんど鉄心を通る。[Function] In this invention, by surrounding the edge portion of the slab material with an iron core, most of the magnetic flux for inductively heating the edge portion of the slab material passes through the iron core.

［実施例コ以下、この発明の一実施例を第１図について説明する。[Example code] An embodiment of the present invention will be described below with reference to FIG.

第１図は誘導加熱コイルの使用状態を示す正面図（ａ）
と側断面図（ｂ＞である０図において、スラブ材（１）
を囲む鉄心（２）は、Ｅ字［同図（ｂ）では左右逆にな
っている］の上、下辺（２ａ）の先端に対向辺（２ｂ）
が形成された形状になっている。Figure 1 is a front view (a) showing how the induction heating coil is used.
In Figure 0, which is a side sectional view (b>), the slab material (1)
The iron core (2) surrounding the
It is shaped like this.

（３）は巻線、（４）は交流電源、（５）は正面側から
見た磁束、（６）および（７）は側面側から見た磁束で
ある。(3) is the winding, (4) is the AC power source, (5) is the magnetic flux seen from the front side, and (6) and (7) are the magnetic fluxes seen from the side side.

次に動作について説明する。スラブ材（１）は矢印の方
向に送られスラブ材＜１＞のエツジ部は加熱パターン（
８）のように誘導加熱される。鉄心（２）はスラブ材（
１）のエツジ部分をヨ状に囲むように配置され、鉄心（
２）の突部に巻回された巻線（３）は交流電源（４）に
接続されている１巻１１（３）に交流電流が流れると、
磁束が発生する。正面図（ａ）側から見ると磁束は（５
）のように発生し、側断面ＩＭ（ｂ）から見ると（６）
および（７）のように磁束が発生する。上記の磁束によ
り、スラブ材（１）のエツジ部は誘導加熱され、斜視部
の加熱パターン（８）が得られる。このとき、磁束（６
）はほとんど鉄心（２）を通るので、加熱効率は７０〜
７５％と向上するなお、上記実施例では、ヨ状鉄心の突
部３箇所に巻線を設けたが、側面の鉄心突部には必ずし
も巻線を設けなくともよい。Next, the operation will be explained. Slab material (1) is fed in the direction of the arrow, and the edge portion of slab material <1> is heated in the heating pattern (
8) is heated by induction. The iron core (2) is made of slab material (
The iron core (
When an alternating current flows through the first winding 11 (3) of the winding (3) wound around the protrusion of 2), which is connected to the alternating current power source (4),
Magnetic flux is generated. When viewed from the front view (a) side, the magnetic flux is (5
), and when viewed from the side cross section IM (b), (6)
And magnetic flux is generated as shown in (7). The edge portion of the slab material (1) is inductively heated by the above magnetic flux, and a heating pattern (8) of the oblique portion is obtained. At this time, the magnetic flux (6
) mostly passes through the iron core (2), so the heating efficiency is 70~
In the above embodiment, windings were provided at three locations on the protrusions of the horizontal core, but windings may not necessarily be provided on the protrusions of the side core.

また、鉄心にヨ状の一体形状のものを使用したが、第２
図に示すように、鉄心（２）を上部と下部の鉄心（２ｃ
）　、　（２ｄ）に分けてもよく、上記実施例と同様の
効果を奏する。In addition, although we used a Y-shaped integral iron core, the second
As shown in the figure, insert the iron core (2) into the upper and lower iron cores (2c
) and (2d), and the same effect as in the above embodiment can be achieved.

さらに、第３図に示すように、鉄心（２）を（２ｅ）と
（２ｆ）に分けてヒンジ（１３）で結合し、鉄心の一部
（２ｅ）が自由に動くようにすれば、スラブ材（１）の
厚さが変わったときに、鉄心部分（２ｅ）を移動し、ス
ラブ材（１）に対して最適位置にセットすることができ
る。Furthermore, as shown in Figure 3, if the iron core (2) is divided into (2e) and (2f) and joined with a hinge (13) so that part of the iron core (2e) can move freely, the slab When the thickness of the material (1) changes, the core portion (2e) can be moved and set at an optimal position relative to the slab material (1).

［発明の効果コ以上のように、この発明によれば、Ｅ字の上。[Effects of invention As described above, according to this invention, above the letter E.

下辺先端に対向辺が形成された形状の鉄心でスラブ材の
エツジ部分を誘導加熱する磁束が鉄心を通るため、スラ
ブ材のエツジ部を７０〜７５％の高い加熱効率で加熱す
ることができる。Since the magnetic flux for inductively heating the edge portion of the slab material passes through the iron core having an opposite side formed at the tip of the lower side, the edge portion of the slab material can be heated with a high heating efficiency of 70 to 75%.

[Brief explanation of the drawing]

第１図はこの発明の一実施例の正面図（ａ）と側断面図
（ｂ）、第２図は他の実施例の側断面図、第３図はさら
に他の実施例の側断面図、第４区は従来の誘導加熱コイ
ル装置の正面図（ａ）と側断面図（ｂ）である。（１）・・スラブ材、（２）・　鉄心、（２ａ）・・上
。下辺、（２ｂ）・・対向辺、（３）　　　・巻線、（４
）・交流電源。なお、各図中、同一符号は同−又は相当部分を示す。Fig. 1 is a front view (a) and a side sectional view (b) of one embodiment of the present invention, Fig. 2 is a side sectional view of another embodiment, and Fig. 3 is a side sectional view of yet another embodiment. , Section 4 is a front view (a) and a side sectional view (b) of a conventional induction heating coil device. (1) Slab material, (2) Iron core, (2a) Top. Lower side, (2b)... Opposite side, (3) ・Winding, (4
)·AC source. In each figure, the same reference numerals indicate the same or corresponding parts.

Claims

[Claims]

An iron core that has a shape with opposing sides formed at the top and bottom ends of the letter E, and is used to surround the edge of the slab material, and this iron core 3.
An induction heating coil device comprising: a winding wound around at least two of the protrusions at the locations and to which an alternating current is applied.