JPS6344963Y2 - - Google Patents
Info
- Publication number
- JPS6344963Y2 JPS6344963Y2 JP1983122607U JP12260783U JPS6344963Y2 JP S6344963 Y2 JPS6344963 Y2 JP S6344963Y2 JP 1983122607 U JP1983122607 U JP 1983122607U JP 12260783 U JP12260783 U JP 12260783U JP S6344963 Y2 JPS6344963 Y2 JP S6344963Y2
- Authority
- JP
- Japan
- Prior art keywords
- coil
- coating layer
- heating coil
- ceramic coating
- heating
- 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
Links
- 238000010438 heat treatment Methods 0.000 claims description 49
- 239000011247 coating layer Substances 0.000 claims description 22
- 238000005524 ceramic coating Methods 0.000 claims description 21
- 230000006698 induction Effects 0.000 claims description 15
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 6
- 239000000919 ceramic Substances 0.000 claims description 5
- 239000011230 binding agent Substances 0.000 claims description 3
- 239000000110 cooling liquid Substances 0.000 claims description 2
- 239000011810 insulating material Substances 0.000 claims 1
- 239000011521 glass Substances 0.000 description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 9
- 229910052802 copper Inorganic materials 0.000 description 9
- 239000010949 copper Substances 0.000 description 9
- 238000009413 insulation Methods 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 5
- 239000002002 slurry Substances 0.000 description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- 235000019353 potassium silicate Nutrition 0.000 description 4
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 4
- 238000000576 coating method Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010292 electrical insulation Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 2
- 238000007592 spray painting technique Methods 0.000 description 2
- ILRRQNADMUWWFW-UHFFFAOYSA-K aluminium phosphate Chemical compound O1[Al]2OP1(=O)O2 ILRRQNADMUWWFW-UHFFFAOYSA-K 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- General Induction Heating (AREA)
Description
【考案の詳細な説明】
本考案は鍛造素材等の加熱に用いられる誘導加
熱炉の加熱コイルに関するものである。[Detailed Description of the Invention] The present invention relates to a heating coil for an induction heating furnace used for heating forged materials and the like.
近年比較的小さな鍛造素材を加熱する加熱装置
として、加熱時間が短かいために、酸化ロスが少
なく、又、作業環境の改善が計られることから、
低周波あるいは高周波の誘導加熱炉が多用されて
いる。 In recent years, as a heating device for heating relatively small forged materials, the heating time is short, so there is less oxidation loss, and the working environment is improved.
Low frequency or high frequency induction heating furnaces are often used.
従来この誘導加熱炉を構成する加熱コイルは内
部に冷却水を流通させる中心孔を有する銅管を用
い、ほぼ全長に渡つて略同一形になるように螺旋
状に巻いた円筒状又は角柱状コイルを形成し、次
に隣接する銅管の絶縁を計るため、該コイルを形
成する銅管の全外周面にガラス質のテープを巻い
ていた。 Conventionally, the heating coil that makes up this induction heating furnace is a cylindrical or prismatic coil that is spirally wound to have a substantially uniform shape over almost the entire length, using a copper tube with a central hole through which cooling water flows. Then, in order to insulate the adjacent copper tubes, glass tape was wrapped around the entire outer circumferential surface of the copper tubes forming the coil.
このコイル上に巻いたガラス質のテープは、電
気絶縁性には優れているが、反面耐熱性が劣る。
このために、３ケ月程度の使用で劣化して部分的
にはがれ絶縁性がそこなわれる。この様にガラス
質のテープは絶縁効果の寿命が短かいため、ガラ
ステープを巻きなおす必要があつた。しかし、コ
イルを形成する銅管は、緻密に巻いてあり、その
間隔は１〜２mm程度と狭い。このためガラステー
プを巻きなおすには、コイルを引き伸ばしてコイ
ルの間隔を広げ、広げたコイルにガラステープを
巻いていた。しかしコイルの状態で全長1m程度
のものでも銅管の長さにすると20m程度となり、
この長い銅管のコイルにガラステープを巻くの非
常に繁雑な作業であつた。 The glass tape wrapped around the coil has excellent electrical insulation properties, but has poor heat resistance.
For this reason, it deteriorates after about three months of use, and some parts peel off, resulting in loss of insulation. As described above, since the life of the insulating effect of glass tape is short, it was necessary to rewind the glass tape. However, the copper tubes forming the coil are tightly wound, with narrow intervals of about 1 to 2 mm. Therefore, in order to rewind the glass tape, the coil was stretched to increase the spacing between the coils, and the glass tape was then wrapped around the expanded coil. However, even if the length of the coil is about 1m, the length of the copper tube will be about 20m.
Wrapping glass tape around this long coil of copper tube was a very complicated task.
本考案は上記の欠点のない誘導加熱炉の加熱コ
イルを提供することを目的とする。 The object of the present invention is to provide a heating coil for an induction heating furnace that does not have the above-mentioned drawbacks.
本考案の誘導加熱炉の加熱コイルは内部に冷却
液を流通させる中心孔を有する管状で螺旋状に巻
いたコイルと該コイルの外周面に被覆された絶
縁、耐熱性のセラミツクス被覆層とで構成されて
いることを特徴とする。 The heating coil of the induction heating furnace of the present invention is composed of a spirally wound tubular coil with a central hole through which cooling liquid flows, and an insulating, heat-resistant ceramic coating layer coated on the outer circumferential surface of the coil. It is characterized by being
本考案に加熱コイルを構成する金属製のコイル
は従来の加熱コイルに用いられている金属製コイ
ルと同一のものを使用できる。金属の材質として
は電気低抗が小さく、加工性の容易な銅が好まし
い。コイルの形状は円筒状でも角柱状でもよい。
又、コイルの大きさ、長さ等の寸法は、使用する
誘導加熱炉の大きさに適する様種々選択すること
ができる。 The metal coil constituting the heating coil of the present invention can be the same as the metal coil used in conventional heating coils. The preferred metal material is copper, which has a small electrical resistance and is easily workable. The shape of the coil may be cylindrical or prismatic.
Further, the dimensions of the coil, such as the size and length, can be selected from various values to suit the size of the induction heating furnace used.
金属製コイルの外周面に被覆されている絶縁耐
熱性のセラミツクス被覆層はアルミナ、窒化珪
素、シリカ等の絶縁性の耐火物粉末で形成されて
いる。耐火物粉末同志の結合が弱い時には、水ガ
ラス、燐酸、燐酸アルミニウム、耐火モルタル、
キヤスタブル等の無機結合剤を使用することがで
きる。セラミツクス被覆層の厚さは、螺旋状に巻
かれた金属製コイルの隣どうしのコイルが接触し
ない程度のものであればよい。通常は１〜２mmで
よい。 The insulating heat-resistant ceramic coating layer coated on the outer peripheral surface of the metal coil is made of insulating refractory powder such as alumina, silicon nitride, and silica. When the bond between refractory powders is weak, water glass, phosphoric acid, aluminum phosphate, refractory mortar,
Inorganic binders such as castables can be used. The thickness of the ceramic coating layer may be such that adjacent spirally wound metal coils do not come into contact with each other. Usually 1 to 2 mm is sufficient.
金属製コイルにセラミツクス被覆層を形成する
方法は、絶縁性、耐熱性に優ぐれたセラミツクス
粉末を適当な溶媒でスラリー状にし、そのスラリ
ーを金属製コイルの表面に刷毛塗り、スプレー塗
装、デイツピング等で塗布して、形成することが
できる。尚、１度の塗布で十分な厚さのセラミツ
クス被覆層が形成できない場合には、２度３度と
重ねて塗布することにより所定の厚さのセラミツ
クス被覆層を形成することができる。無機結合剤
として水ガラスを使用する場合には、水ガラスと
セラミツクス粉末とでスラリーを形成し、そのス
ラリーを上記した様な方法で塗布する。この水ガ
ラスは空気中の炭酸ガスを吸収して自らゲル化
し、比較的強度の高いセラミツクス被覆層が得ら
れる。本考案の誘導加熱炉の素熱コイルは金属製
コイルの外周面に形成される絶縁層がセラミツク
ス被覆層であるために、耐熱性、絶縁性ともに従
来のガラステープに比べて格段に優ぐれている。
このため、本考案の加熱コイルは絶縁層の再生ま
での寿命が、従来の加熱コイルの２倍程度長いも
のとなる。又、セラミツクス被覆層の形成がスプ
レー塗装、デイツピング等の塗装方法により形成
できるために、セラミツクス被覆層が劣化した様
な場合にも比較的簡単にセラミツクス被覆層を再
生することができる。 The method of forming a ceramic coating layer on a metal coil is to make a slurry of ceramic powder, which has excellent insulation and heat resistance, with an appropriate solvent, and then apply the slurry to the surface of the metal coil by brushing, spray painting, dipping, etc. can be applied and formed. In addition, if a ceramic coating layer of sufficient thickness cannot be formed by one coating, a ceramic coating layer of a predetermined thickness can be formed by applying the coating two or three times. When water glass is used as the inorganic binder, a slurry is formed with water glass and ceramic powder, and the slurry is applied by the method described above. This water glass absorbs carbon dioxide gas in the air and gels itself, yielding a relatively strong ceramic coating layer. Since the insulating layer formed on the outer circumferential surface of the metal coil is a ceramic coating layer, the elementary heating coil of the induction heating furnace of this invention has both heat resistance and insulation properties that are significantly superior to conventional glass tapes. There is.
Therefore, the heating coil of the present invention has a lifespan of about twice as long as the conventional heating coil until the insulating layer is regenerated. Further, since the ceramic coating layer can be formed by a coating method such as spray painting or dipping, even if the ceramic coating layer has deteriorated, it can be regenerated relatively easily.
以下、実施例により説明する。 Examples will be explained below.
本考案の一実施例である加熱コイルを用いた誘
導加熱炉の一部欠損要部斜視図を第１図に縦断面
図を第２図に示す。この加熱炉は高アルミナ製の
円筒形状の炉芯管１と該炉芯管１と同心軸的に外
側を囲む本考案の加熱コイル２を主な構成要素と
する。炉芯管１内には２本のスキツトレール１１
が平行に設けられ、それらレール１１上に被加熱
材（ビレツト）Ｗが載置されて加熱される。加熱
コイル２は内部に冷却水を流通させる中心孔を用
する銅管を全長に亘つて略同一径になるように螺
旋状に巻いたコイル２１とこのコイル２１の外周
面を被覆するアルミナで構成されたセラミツクス
被覆層２２で構成されている。この加熱コイル２
は支持板３に保持されている。 FIG. 1 is a partially cutaway perspective view of an induction heating furnace using a heating coil, which is an embodiment of the present invention, and FIG. 2 is a vertical sectional view of the induction heating furnace. The main components of this heating furnace are a cylindrical furnace core tube 1 made of high alumina and a heating coil 2 of the present invention that surrounds the outside of the furnace core tube 1 concentrically. There are two skid rails 11 inside the furnace core tube 1.
are provided in parallel, and a material to be heated (billet) W is placed on these rails 11 and heated. The heating coil 2 is composed of a coil 21 which is a copper tube with a central hole through which cooling water flows, and is spirally wound to have approximately the same diameter over the entire length, and alumina covering the outer peripheral surface of the coil 21. The ceramic coating layer 22 is made of a ceramic coating layer 22. This heating coil 2
is held on the support plate 3.
本考案の加熱コイルを用いた誘導加熱炉は上記
のように構成されている。 The induction heating furnace using the heating coil of the present invention is configured as described above.
この誘導加熱炉により被加熱材である鍛造ビレ
ツトを加熱するには、複数本のビレツトをピンチ
ローラ（図示せず）で挾持して、連続的に加熱炉
の炉芯管１のスキツトレール１１上に挿入し、つ
いで加熱コイル２に通電する。これにより、炉芯
管１内のビレツトＷを1200℃程度に加熱するもの
である。 In order to heat a forged billet, which is a material to be heated, in this induction heating furnace, a plurality of billets are held between pinch rollers (not shown) and successively placed on the skid rail 11 of the core tube 1 of the heating furnace. The heating coil 2 is then energized. This heats the billet W in the furnace core tube 1 to about 1200°C.
本考案の加熱コイル２は、被加熱材であるビレ
ツトＷが高温に加熱されると、その幅射熱等によ
つ加熱コイル２自体も200℃程度まで加熱されて
昇温する。しかし、本考案の加熱コイル２を構成
する銅管製のコイル２１の外周面は絶縁性、耐熱
性に優ぐれたセラミツクス被覆層２２が形成され
ているため、加熱コイル２の電気絶縁性は長期間
安定に保たれる。また何らかの理由でセラミツク
ス被覆層が欠けおちるような事があつても、セラ
ミツクス粉末を含むスラリーをコイル２１の外周
面に塗布して、セラミツクス被覆層を容易に再生
することができる。 In the heating coil 2 of the present invention, when the billet W, which is the material to be heated, is heated to a high temperature, the heating coil 2 itself is heated to about 200° C. due to the radiated heat and the temperature rises. However, since a ceramic coating layer 22 with excellent insulation and heat resistance is formed on the outer peripheral surface of the copper tube coil 21 that constitutes the heating coil 2 of the present invention, the electrical insulation of the heating coil 2 will last for a long time. It remains stable for a period of time. Furthermore, even if the ceramic coating layer is chipped for some reason, the ceramic coating layer can be easily regenerated by applying a slurry containing ceramic powder to the outer peripheral surface of the coil 21.
なお、前記実施例においては加熱コイル２を構
成するセラミツクス被覆層としてアルミナ
（AI2O3）を用いたが、窒化珪素、（Si3N4）を用
いても同様の効果を奏する。 In the above embodiment, alumina (AI 2 O 3 ) was used as the ceramic coating layer constituting the heating coil 2, but the same effect can be obtained by using silicon nitride (Si 3 N 4 ).
本考案は加熱コイルを構成する金属製コイル外
周面に絶縁性、耐熱性に優ぐれたセラミツクス被
覆層を形成した。このため、幅射熱でセラミツク
ス被覆層が高温に加熱されても劣化する恐れが少
ない。従来のガラス質のテープの寿命が３ケ月と
短かいため、巻き直しが大変であつたが、本考案
のセラミツクス被覆層は形成するのが簡単で、そ
の上にその寿命が６ケ月と従来のコイルに比べて
２倍の寿命を有する。このため、本考案は産業上
利用するところ極めて大である。 In the present invention, a ceramic coating layer with excellent insulation and heat resistance is formed on the outer peripheral surface of the metal coil that constitutes the heating coil. Therefore, even if the ceramic coating layer is heated to a high temperature by radiant heat, there is little risk of deterioration. Conventional glass tapes had a short lifespan of 3 months, making it difficult to rewind them, but the ceramic coating layer of the present invention is easy to form and has a lifespan of 6 months, which is longer than conventional glass tapes. It has twice the lifespan compared to coils. Therefore, the present invention has great industrial application.
第１図は本考案の加熱コイルを用いた誘導加熱
炉の一部欠損要部斜視図、第２図は第１図の誘導
加熱炉の縦断面図である。
１……炉芯管、２……加熱コイル、２１……コ
イル、２２……セラミツクス被覆層。
FIG. 1 is a partially cutaway perspective view of an induction heating furnace using the heating coil of the present invention, and FIG. 2 is a longitudinal sectional view of the induction heating furnace of FIG. 1. DESCRIPTION OF SYMBOLS 1... Furnace core tube, 2... Heating coil, 21... Coil, 22... Ceramics coating layer.
Claims (1)
られる誘導加熱炉の加熱コイルであつて、この
加熱コイルは内部に冷却液を流通させる中心孔
を有する管状で、螺旋状に巻かれた金属製のコ
イルと、該コイルの外周面に被覆された絶縁、
耐熱性のセラミツクス被覆層とで構成されてい
ることを特徴とする誘導加熱炉の加熱コイル。 (2) セラミツクス被覆層はセラミツクス粉末を無
機結合剤で固めて形成されたものである実用新
案登録請求の範囲第１項記載の加熱コイル。[Utility Model Claims] (1) A heating coil for an induction heating furnace in which a furnace core tube is provided to accommodate a material to be heated, the heating coil being a tube having a central hole through which a cooling liquid flows, the heating coil being made of a metal coil wound in a spiral shape, and an insulating material coated on the outer surface of the coil.
A heating coil for an induction heating furnace, characterized in that it is composed of a heat-resistant ceramic coating layer. (2) A heating coil as described in claim 1 of the utility model registration, in which the ceramic coating layer is formed by solidifying ceramic powder with an inorganic binder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1983122607U JPS6030509U (en) | 1983-08-05 | 1983-08-05 | induction heating furnace heating coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1983122607U JPS6030509U (en) | 1983-08-05 | 1983-08-05 | induction heating furnace heating coil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6030509U JPS6030509U (en) | 1985-03-01 |
| JPS6344963Y2 true JPS6344963Y2 (en) | 1988-11-22 |
Family
ID=30280190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1983122607U Granted JPS6030509U (en) | 1983-08-05 | 1983-08-05 | induction heating furnace heating coil |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6030509U (en) |
-
1983
- 1983-08-05 JP JP1983122607U patent/JPS6030509U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6030509U (en) | 1985-03-01 |
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