JPH0693378B2 - Continuous feed type induction heating device - Google Patents
Continuous feed type induction heating deviceInfo
- Publication number
- JPH0693378B2 JPH0693378B2 JP28694189A JP28694189A JPH0693378B2 JP H0693378 B2 JPH0693378 B2 JP H0693378B2 JP 28694189 A JP28694189 A JP 28694189A JP 28694189 A JP28694189 A JP 28694189A JP H0693378 B2 JPH0693378 B2 JP H0693378B2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- coil
- heated
- heating
- heating coil
- 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 - Lifetime
Links
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、鍛造用の連続送り式誘導加熱装置の停止後
の再立ち上げ方法に関するものである。Description: TECHNICAL FIELD The present invention relates to a method for restarting a continuous feed induction heating device for forging after being stopped.
従来、特公昭63-10875号公報に示す様に、後工程がトラ
ブル停止した場合の連続送り式誘導加熱装置は完全停止
保温が困難なため微速送り保温を採用していた。微速送
り保温とは、所定の搬送速度に対して50〜60％に落し
て、後工程が立上るまでの待機時の捨て材を少くしよう
とするものであった。Conventionally, as shown in Japanese Examined Patent Publication No. 63-10875, a continuous feed type induction heating device is difficult to completely stop and keep warm when a trouble occurs in a post process, so a slow feed warming is adopted. Slow feed heat retention was intended to reduce the amount of waste material at the time of waiting until the start of the subsequent process by reducing it to 50 to 60% with respect to a predetermined transport speed.
従来は微速送り保温をしていたため、保温時間が長時間
に亘ったり大型装置で加熱コイルが長い場合捨て材（後
工程に送られずにバイパスされる被加熱物）が大量に排
出され、バイパスされた捨て材の処理に困っていた。In the past, heat was fed at a slow speed, so if the heat retention time was long or the heating coil was long in a large device, a large amount of waste material (the object to be heated that is bypassed without being sent to the subsequent process) will be discharged and bypassed. I was having trouble processing the discarded materials.
本発明は連続送り式の誘導加熱装置でも、捨て材を発生
させないようにしたものである。The present invention does not generate waste material even in a continuous feed type induction heating device.
この発明に係る連続送り式誘導加熱装置は、加熱コイル
と、上記加熱コイルに電力を印加する加熱電源発生装置
と、上記加熱コイルの出口側に配置した温度補償用コイ
ルと、上記温度補償用コイルに電力を印加する温度補償
用電源発生装置とを備え、上記加熱コイルと上記温度補
償用コイルを用いて連続的に被加熱物を定常速度で搬送
させながら誘導加熱して昇温させる誘導加熱装置におい
て、この誘導加熱装置の停止後の再立ち上げ時に、停止
時間から演算した上記被加熱物の低下温度と、上記被加
熱物の目標温度との差より上記温度補償用コイルの印加
電力を演算する演算装置を備えたものである。A continuous feed type induction heating device according to the present invention includes a heating coil, a heating power supply device that applies electric power to the heating coil, a temperature compensation coil disposed on the outlet side of the heating coil, and the temperature compensation coil. And an induction heating device for raising the temperature by induction heating while continuously conveying the object to be heated at a constant speed using the heating coil and the temperature compensation coil. At the time of restarting after the induction heating device is stopped, the applied power of the temperature compensation coil is calculated from the difference between the lowered temperature of the object to be heated calculated from the stop time and the target temperature of the object to be heated. It is equipped with a computing device that
また、加熱コイルと、上記加熱コイルに電力を印加する
加熱電源発生装置と、上記加熱コイルの出口側に配置し
た温度補償用コイルと、上記温度補償用コイルに電力を
印加する温度補償用電源発生装置とを備え、定常時は上
記加熱コイルを用い、誘導加熱装置の停止後の再立ち上
げ時には上記加熱コイルと上記温度補償用コイルを用い
て、連続的に被加熱物を搬送させながら誘導加熱して昇
温させる上記誘導加熱装置において、上記再立ち上げ時
に停止時間から演算した上記被加熱物の低下温度と、上
記被加熱物の目標温度との差より上記温度補償用コイル
の印加電力を演算する演算装置を備えたものである。Also, a heating coil, a heating power supply generator that applies power to the heating coil, a temperature compensation coil that is arranged on the outlet side of the heating coil, and a temperature compensation power supply that applies power to the temperature compensation coil. The above-mentioned heating coil is used in the steady state, and the induction heating device is continuously heated while the induction heating device is restarted after the induction heating device is restarted. In the induction heating device for raising the temperature, the applied power of the temperature compensation coil is calculated from the difference between the lower temperature of the object to be heated calculated from the stop time at the time of restarting and the target temperature of the object to be heated. It is provided with a computing device for computing.
第１図は本発明の連続送り式誘導加熱装置の１実施例を
示した。第２図は構成図と昇温パターンを示した。第１
図の例では加熱電源（以下インバータと称する）４
（ａ）と温度補償用加熱電源４（ｂ）から構成され、加
熱用インバータ４（ａ）には加熱用コイル１（ａ）が接
続され、温度補償用インバータ４（ｂ）には、温度補償
用加熱コイル１（ｂ）が接続されている。被加熱物（1
0）は送入コンベア（８）でピンチローラ（２）に送り
込まれ、ピンチローラ（２）によって加熱コイル（１
（ａ）），温度補償用加熱コイル（１（ｂ））に順次送
り込まれ、加熱され取り出される。通常加熱時は温度補
償用加熱コイル（１（ｂ））は均熱用として用いられる
ため、被加熱物（10）の昇温パターンは第２図のカーブ
（１）の如くになっている。今、ラインが停止したとす
ると、その停止時間に応じてカーブ（１）の高温部分か
ら放冷により温度が低下し、カーブ（２）の様になる。
このレベルは放冷時間による。例えば、第３図は被加熱
物の径がφ70材の放冷曲線である。そのカーブは第３図
に示す様に、連続している事が特徴である。第２図にお
いて、加熱コイル（１（ａ））と温度補償用加熱コイル
（１（ｂ））のつなぎ目は、発熱作用がないため、静止
状態でインバータ４（ａ）,4（ｂ）をON-OFFしたりする
と温度差が発生するが、放冷のみであれば、それ程差が
発生せず温度は連続となる。ライン再開後の再運転時は
そのまま、インバータ４（ａ）,4（ｂ）を発振させ、定
常速度で搬送させると、昇温パターンは、加熱コイル１
（ａ），温度補償用加熱コイル１（ｂ）に入っている部
分はカーブ（１）との差だけ不足し、次第にカーブ
（３）の如くの経過をたどって、カーブ（１）に近づい
て行く。FIG. 1 shows one embodiment of the continuous feed type induction heating apparatus of the present invention. FIG. 2 shows a configuration diagram and a temperature rise pattern. First
In the example of the figure, a heating power source (hereinafter referred to as an inverter) 4
(A) and a heating power source 4 (b) for temperature compensation, the heating coil 1 (a) is connected to the heating inverter 4 (a), and the temperature compensation inverter 4 (b) is temperature compensated. Heating coil 1 (b) is connected. Object to be heated (1
0) is fed to the pinch roller (2) by the infeed conveyor (8), and the heating coil (1) is fed by the pinch roller (2).
(A)), It is sequentially sent to the heating coil (1 (b)) for temperature compensation, heated and taken out. Since the heating coil for temperature compensation (1 (b)) is used for soaking during normal heating, the temperature rising pattern of the object to be heated (10) is as shown by the curve (1) in FIG. If the line is stopped now, the temperature is lowered from the high temperature portion of the curve (1) by cooling, depending on the stop time, and the curve becomes as shown in the curve (2).
This level depends on the cooling time. For example, FIG. 3 is a cooling curve of a material to be heated having a diameter of φ70. The curve is characterized by being continuous as shown in FIG. In FIG. 2, the joint between the heating coil (1 (a)) and the temperature compensating heating coil (1 (b)) does not generate heat, so the inverters 4 (a), 4 (b) are turned on in a stationary state. -When it is turned off, a temperature difference occurs, but if only cooling is done, the temperature does not change so much and the temperature is continuous. When the inverters 4 (a) and 4 (b) are oscillated and conveyed at a steady speed during the restart after the line is restarted, the temperature rising pattern is the heating coil 1
(A), the portion of the temperature compensating heating coil 1 (b) is insufficient by the difference from the curve (1), and gradually follows the curve (3) to approach the curve (1). go.
誘導加熱装置のライン再開後の再立ち上げ時には以下の
ような運転を行う。まず、演算装置（20）内にて誘導加
熱装置が停止した時点からあらかじめタイマーを動作さ
せておき、再立ち上げ開始時点からの経過時間を測定す
る。第３図のカーブは演算装置（20）内に記憶されてい
る。上記の経過時間より第３の図カーブで被加熱物（1
0）の低下温度を判断する。この場合の被加熱物（10）
の位置は例えば加熱コイル（1a）と温度補償用加熱コイ
ル（1b）との間にあるものを基準とする。すなわち、こ
の両コイル間にある被加熱物（10）を、低下した温度か
ら所定の目標温度まで昇温させることを考える。The following operations are performed when the induction heating device is restarted after the line is restarted. First, the timer is operated in advance from the time when the induction heating device is stopped in the arithmetic unit (20), and the elapsed time from the restart start time is measured. The curve of FIG. 3 is stored in the arithmetic unit (20). From the above elapsed time, the object to be heated (1
0) Decide the lowering temperature. Object to be heated in this case (10)
The position of is based on, for example, the position between the heating coil (1a) and the temperature compensating heating coil (1b). That is, it is considered that the object to be heated (10) between the both coils is heated from the lowered temperature to a predetermined target temperature.
ここで、加熱コイル（1a）および温度補償用加熱コイル
（1b）に印加する電力は以下のようにして決められる。
まず、加熱コイル（1a）に印加する電力は、定常運転時
の電力より演算される。ここで、同一の被加熱物（10）
に対しては、昇温量が同じにするためには印加電力はほ
ぼ搬送速度に比例する。よって、定常運転時の搬送速度
SOに対して、再立ち上げ運転時の搬送速度がSLである
と、再立ち上げ運転時の電力は、定常運転時の電力にSL
/SOを乗じた値とする。Here, the electric power applied to the heating coil (1a) and the temperature compensation heating coil (1b) is determined as follows.
First, the electric power applied to the heating coil (1a) is calculated from the electric power during steady operation. Here, the same object to be heated (10)
On the other hand, the applied electric power is almost proportional to the transport speed in order to make the temperature rise amount the same. Therefore, the transport speed during steady operation
If the transport speed during the restart operation is S L with respect to S O , the power during the restart operation will be S L
The value is multiplied by / S O.
次に温度補償用加熱コイル（1b）に印加する電力（温度
補償用電力）は、目標温度と低下温度の差より決められ
る。一般的に昇温に要する電力は、上記の温度差にほぼ
比例して大きくなるので、温度補償用電力も温度差にほ
ぼ比例する。また、温度補償用電力と温度差の関係式
は、被加熱物（10）の種類（主に被加熱物の径）ごとに
異なるので、被加熱物（10）の種類ごとに記憶させる必
要がある。Next, the power (temperature compensation power) applied to the temperature compensation heating coil (1b) is determined by the difference between the target temperature and the lowered temperature. Generally, the electric power required to raise the temperature increases substantially in proportion to the above-mentioned temperature difference, so that the temperature compensating electric power also becomes almost proportional to the temperature difference. Also, since the relational expression between the temperature compensating power and the temperature difference varies depending on the type of the object to be heated (10) (mainly the diameter of the object to be heated), it is necessary to store it for each kind of the object to be heated (10). is there.
温度補償用電力を印加する期間（温度補償運転期間）
は、再立ち上げ開始時点から、再立ち上げ開始時点で加
熱コイル（1a）および温度補償用加熱コイル（1b）にあ
った被加熱物（10）がすべて加熱、排出される時点まで
である。この期間は以下の動作によって判断される。被
加熱物（10）に接触して被加熱物（10）の動きとともに
回転するフリーローラ（５）に接続した金属羽根（７）
を近接スイッチ（６）で検出してパルスを発生させる。
このパルスの発生量は被加熱物（10）搬送距離に比例し
ているので、パルス量を計測することにより被加熱物
（10）の搬送距離を知ることができる。加熱コイル（1
a）および温度補償用加熱コイル（1b）の全体の長さに
応じたパルス量はあらかじめわかっているので、再立ち
上げ開始時点からパルスの量を計測して、温度補償用運
転期間を決定することができる。Period for applying power for temperature compensation (temperature compensation operation period)
Is from the time when the restart is started to the time when all the objects to be heated (10) in the heating coil (1a) and the temperature-compensating heating coil (1b) at the time when the restart is started are heated and discharged. This period is determined by the following operation. Metal blades (7) connected to a free roller (5) that comes into contact with the object to be heated (10) and rotates with the movement of the object to be heated (10)
Is detected by the proximity switch (6) to generate a pulse.
Since the generation amount of this pulse is proportional to the conveyance distance of the object to be heated (10), the conveyance distance of the object to be heated (10) can be known by measuring the pulse amount. Heating coil (1
Since the pulse amount according to the total length of a) and the temperature compensation heating coil (1b) is known in advance, measure the pulse amount from the start of restarting and determine the temperature compensation operation period. be able to.
また、温度補償用運転期間中の被加熱物（10）の搬送速
度は定常運転時の速度より低い速度、例えば1/2程度の
速度とする。これは、以下の理由による。誘導加熱の場
合、被加熱物（10）の表面に誘導電流を流すので表面か
ら加熱、昇温され、内面は表面からの熱伝導によるた
め、熱伝導に要する時間が必要になる。装置の再立ち上
げ開始時には被加熱物（10）の温度が定常運転時より低
下しているので、これを温度補償運転を行って目標温度
まで昇温させる場合、定常運転時より昇温時間を多く要
する。従って、搬送速度を低くして、昇温時間を長くと
る。Further, the conveyance speed of the object to be heated (10) during the temperature compensation operation period is lower than the speed during steady operation, for example, about 1/2 speed. This is for the following reason. In the case of induction heating, since an induction current is passed through the surface of the object to be heated (10), the surface is heated and the temperature is raised, and since the inner surface is conducted by heat from the surface, a time required for heat conduction is required. The temperature of the object to be heated (10) is lower than that during steady operation at the start of restarting the equipment.Therefore, when performing temperature compensation operation to raise the temperature to the target temperature, increase the temperature rise time from that during steady operation. It costs a lot. Therefore, the transport speed is set low and the temperature rising time is set long.
このようにして、温度補償用電力を印加して再立ち上げ
を開始すると、再立ち上げ開始時に温度補償用加熱コイ
ル（1b）にあった被加熱物（10）の内、加熱コイル（1
a）に近い箇所の被加熱物（10）は目標温度に昇温する
電力を印加されるため、目標温度まで昇温する。また、
再立ち上げ開始時に加熱コイル（1a）内にあった被加熱
物（10）は、加熱コイル（1a）内においては、定常運転
時の加熱コイル（1a）の昇温目標値までは昇温しない
が、温度補償用加熱コイル（1b）に入るにつれて温度補
償用電力を印加されるため、すべて所定の目標温度に昇
温させて排出することができる。ただし、再立ち上げ開
始時に温度補償用加熱コイル（1b）の出側近くにある被
加熱物（10）は、再立ち上げ開始時に温度低下が大きい
場合、温度補償運転で所定温度まで昇温させることが困
難なので、出側にてバイパスすることになる。このバイ
パス有無の判断は、温度補償用加熱コイル（1b）の出側
にある温度検出器（図示せず）にて行われる。再立ち上
げ開始時に加熱コイル（1a）にまだ入っていない被加熱
物（10）は、所定の昇温電力を印加されるので、当然な
がら目標温度まで昇温する。In this way, when the temperature compensating power is applied and the restart is started, the heating coil (1) among the objects (10) that were in the temperature compensating heating coil (1b) at the start of restarting
The object to be heated (10) near the point a) is heated to the target temperature because electric power for increasing the temperature to the target temperature is applied. Also,
The object to be heated (10), which was inside the heating coil (1a) at the start of restarting, does not rise in temperature inside the heating coil (1a) to the heating coil (1a) heating target value during steady operation. However, since the temperature compensating electric power is applied as it enters the temperature compensating heating coil (1b), the temperature can be raised to a predetermined target temperature and discharged. However, if the temperature drop of the object to be heated (10) near the outlet side of the temperature compensation heating coil (1b) at the start of restart is large at the start of restart, the temperature is raised to a predetermined temperature by temperature compensation operation. It is difficult to do so, so it will be bypassed on the exit side. The presence / absence of the bypass is determined by a temperature detector (not shown) on the output side of the temperature compensation heating coil (1b). The object to be heated (10) that has not entered the heating coil (1a) at the start of restarting is naturally heated to the target temperature because a predetermined heating power is applied.
実際の温度補償用電力の印加値は、あらかじめテストに
より最適値を決定して、演算装置（20）に記憶しておく
ことが望ましい。It is desirable that the actual applied value of the power for temperature compensation be determined in advance by a test and stored in the arithmetic unit (20).
次に実施例２について説明する。第４図において、（3
1）は送出ローラ装置、（32）は移動台車である。他
は、実施例１と同じである。Next, a second embodiment will be described. In Fig. 4, (3
1) is a delivery roller device, and (32) is a moving carriage. Others are the same as those in the first embodiment.
次に動作について説明する。定常運転時は、送出ローラ
装置（31）が加熱コイル（1a）の出側ライン上に配置す
るように移動台車（32）を移動させておく。この状態で
は、被加熱物（10）は加熱コイル（1a）のみで加熱、昇
温されて、送出ローラ装置（31）で排出される。送出ロ
ーラ装置（31）はモータなどで高速で駆動されているの
で、加熱コイル（1a）から排出された被加熱物（10）は
高速で排出される。実施例１と同じく誘導加熱装置の停
止後の再立ち上げ時には、以下の動作が行われる。ま
ず、移動台車（32）に移動指令が出され、温度補償用加
熱コイル（1b）が加熱コイル（1a）の出側ライン上に配
置するように、移動台車（32）が移動する。以下の動作
は実施例１の再立ち上げ時と同じである。ラインの操業
を終了して、被加熱物（10）が加熱コイル（1a）および
温度補償用加熱コイル（1b）になくなったときには、再
び送出ローラ装置（31）がライン上に配置されるよう
に、移動台車（32）が移動される。Next, the operation will be described. During steady operation, the moving carriage (32) is moved so that the delivery roller device (31) is arranged on the exit line of the heating coil (1a). In this state, the object to be heated (10) is heated and heated only by the heating coil (1a) and discharged by the delivery roller device (31). Since the delivery roller device (31) is driven at high speed by a motor or the like, the object to be heated (10) discharged from the heating coil (1a) is discharged at high speed. Similar to the first embodiment, at the time of restarting after the induction heating device is stopped, the following operation is performed. First, a movement command is issued to the moving carriage (32), and the moving carriage (32) moves so that the temperature compensating heating coil (1b) is arranged on the exit line of the heating coil (1a). The following operation is the same as the restarting of the first embodiment. When the operation of the line is finished and the object to be heated (10) disappears from the heating coil (1a) and the temperature compensating heating coil (1b), the delivery roller device (31) is arranged again on the line. The moving carriage (32) is moved.
本実施例２では、温度補償用加熱コイル（1b）は、再立
ち上げ後のみ使用される。従って、定常運転時は温度補
償用加熱コイル（1b）は使用されないので、再立ち上げ
時には送出ローラ装置（31）上には被加熱物（10）はな
い。従って、温度補償運転の開始時には温度補償用加熱
コイル（1b）の中に低温の被加熱物（10）があることは
ないので、実施例１のようにバイパス材が出ることはな
く、むだの低減につながる。In the second embodiment, the temperature compensating heating coil (1b) is used only after restarting. Therefore, since the temperature compensating heating coil (1b) is not used during steady operation, there is no object to be heated (10) on the delivery roller device (31) when restarting. Therefore, at the start of the temperature compensating operation, there is no low-temperature object (10) in the temperature compensating heating coil (1b), so that the bypass material does not come out as in the first embodiment, which is a waste. It leads to reduction.
以上の様に、本発明によれば連続送り式の誘導加熱装置
において、不慮のライン停止後でも所定温度に昇温して
いないためバイパス材を減らす又はなくす事が可能とな
った。従って、高温の捨て材がすくないので、ラインの
規定外の作業が少なく作業性が大巾に向上するという効
果を奏する。As described above, according to the present invention, in the continuous feed type induction heating device, the bypass material can be reduced or eliminated because the temperature is not raised to the predetermined temperature even after the line is accidentally stopped. Therefore, since the high temperature waste material is not so large, there is less work out of line and the workability is greatly improved.
第１図は本発明のものの実施例１を示した外観図であ
る。第２図は各条件での昇温パターン例を示した図，第
３図は被加熱物がφ70材の放冷曲線の計算値を示した
図、第４図は実施例２を示した図である。 （1a）は加熱コイル、（1b）は温度補償用加熱コイル、
（２）はピンチローラ、（３）はスキッドレール、
（４）はインバータ、（５）はフリーローラ、（６）は
近接スイッチ、（７）は金属羽根、（８）は送入コンベ
ア、（10）は被加熱物、（20）は演算装置、（31）は送
出ローラ装置、（32）は移動台車を示す。FIG. 1 is an external view showing a first embodiment of the present invention. FIG. 2 is a diagram showing an example of a temperature rising pattern under each condition, FIG. 3 is a diagram showing a calculated value of a cooling curve of a φ70 material to be heated, and FIG. 4 is a diagram showing Example 2 Is. (1a) is a heating coil, (1b) is a heating coil for temperature compensation,
(2) is a pinch roller, (3) is a skid rail,
(4) is an inverter, (5) is a free roller, (6) is a proximity switch, (7) is a metal blade, (8) is a feeding conveyor, (10) is a heated object, (20) is a computing device, (31) shows a sending roller device, and (32) shows a moving carriage.
Claims (4)
加する加熱電源発生装置と、上記加熱コイルの出口側に
配置した温度補償用コイルと、上記温度補償用コイルに
電力を印加する温度補償用電源発生装置とを備え、上記
加熱コイルと上記温度補償用コイルを用いて連続的に被
加熱物を定常速度で搬送させながら誘導加熱して昇温さ
せる誘導加熱装置において、誘導加熱装置の停止後の再
立ち上げ時に、停止時間から演算した上記被加熱物の低
下温度と、上記被加熱物の目標温度との差より上記温度
補償用コイルの印加電力を演算する演算装置を有するこ
とを特徴とする連続送り式誘導加熱装置。1. A heating coil, a heating power generator for applying electric power to the heating coil, a temperature compensating coil arranged on the outlet side of the heating coil, and temperature compensating for applying electric power to the temperature compensating coil. In the induction heating device, which is provided with a power source generator for induction and uses the heating coil and the temperature compensation coil to continuously convey the object to be heated at a constant speed to raise the temperature, the induction heating device is stopped. At the time of restarting later, it has a calculation device for calculating the applied power of the temperature compensation coil from the difference between the lowered temperature of the object to be heated calculated from the stop time and the target temperature of the object to be heated. Continuous feed type induction heating device.
加する加熱電源発生装置と、上記加熱コイルの出口側に
配置した温度補償用コイルと、上記温度補償用コイルに
電力を印加する温度補償用電源発生装置とを備え、定常
時は上記加熱コイルを用い、誘導加熱装置の停止後の再
立ち上げ時には上記加熱コイルと上記温度補償用コイル
を用いて、連続的に被加熱物を搬送させながら誘導加熱
して昇温させる上記誘導加熱装置において、上記再立ち
上げ時に停止時間から演算した上記被加熱物の低下温度
と、上記被加熱物の目標温度との差より上記温度補償用
コイルの印加電力を演算する演算装置を有することを特
徴とする連続送り式誘導加熱装置。2. A heating coil, a heating power source generator for applying electric power to the heating coil, a temperature compensation coil arranged on the outlet side of the heating coil, and temperature compensation for applying electric power to the temperature compensation coil. Power supply generator, the heating coil is used in a steady state, and when the induction heating device is restarted after being stopped, the heating coil and the temperature compensating coil are used to continuously convey the object to be heated. While in the induction heating device that raises the temperature by induction heating, the temperature compensation coil of the temperature compensation coil is calculated from the difference between the lower temperature of the object to be heated calculated from the stop time at the time of restart and the target temperature of the object to be heated. A continuous feed type induction heating device having a calculation device for calculating applied power.
で被加熱物を搬送することを特徴とする請求項１または
２の連続送り式誘導加熱装置。3. The continuous feed type induction heating apparatus according to claim 1, wherein the object to be heated is conveyed at a speed lower than the steady speed at the time of restarting.
動されることを特徴とする請求項２の連続送り式誘導加
熱装置。4. The continuous feed induction heating apparatus according to claim 2, wherein the temperature compensating coil is moved by a moving carriage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28694189A JPH0693378B2 (en) | 1989-11-02 | 1989-11-02 | Continuous feed type induction heating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28694189A JPH0693378B2 (en) | 1989-11-02 | 1989-11-02 | Continuous feed type induction heating device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03149795A JPH03149795A (en) | 1991-06-26 |
| JPH0693378B2 true JPH0693378B2 (en) | 1994-11-16 |
Family
ID=17710937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28694189A Expired - Lifetime JPH0693378B2 (en) | 1989-11-02 | 1989-11-02 | Continuous feed type induction heating device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0693378B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06132071A (en) * | 1992-10-19 | 1994-05-13 | Mitsubishi Electric Corp | Induction heating device |
-
1989
- 1989-11-02 JP JP28694189A patent/JPH0693378B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03149795A (en) | 1991-06-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS60755B2 (en) | induction heating device | |
| JPH0693378B2 (en) | Continuous feed type induction heating device | |
| KR100222332B1 (en) | Apparatus for connecting billets in a continuous mill | |
| JPH11121154A (en) | Induction heating device | |
| JPH0693379B2 (en) | Reheating method of continuous feed type induction heating device | |
| JPH0693380B2 (en) | Reheating method of continuous feed type induction heating device | |
| JPS6037599B2 (en) | induction heating device | |
| JPS5872384A (en) | Switching device for current/speed control | |
| JPS63119922A (en) | Control method for pitch during rolling | |
| KR20040040562A (en) | Apparatus for measuring the length of slab before being put in the heating furnace | |
| JPS5842435Y2 (en) | Local instantaneous continuous heating device for steel billets | |
| JPH0430916A (en) | Control method and device for wire-cut electric discharge machine | |
| JP3884828B2 (en) | Method for determining the heating state of a metal billet | |
| EP0518691A2 (en) | Method and apparatus for attaching belt-shaped member to forming drum | |
| JP2887734B2 (en) | Forging material heating device | |
| JP3164283B2 (en) | Lead frame heating method and apparatus | |
| JP2665982B2 (en) | Conveyor speed control method in bias cutter device | |
| JPH0438663B2 (en) | ||
| JPH1133697A (en) | Method and apparatus for determining heating state of metal billet | |
| JP3294773B2 (en) | Induction heating device and control method thereof | |
| JP2548816B2 (en) | Continuous transfer induction heating method | |
| JPS5837534Y2 (en) | Material cutting control device | |
| JPS5949127B2 (en) | Flying crop shear cutting control device | |
| JPH07236938A (en) | Detecting device for joint part between bars | |
| JPS6144524A (en) | Method of cutting off metal material |