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JPS623915Y2 - - Google Patents

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Publication number
JPS623915Y2
JPS623915Y2 JP140983U JP140983U JPS623915Y2 JP S623915 Y2 JPS623915 Y2 JP S623915Y2 JP 140983 U JP140983 U JP 140983U JP 140983 U JP140983 U JP 140983U JP S623915 Y2 JPS623915 Y2 JP S623915Y2
Authority
JP
Japan
Prior art keywords
voltage
power source
frequency power
output transformer
high frequency
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
Application number
JP140983U
Other languages
Japanese (ja)
Other versions
JPS59107496U (en
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP140983U priority Critical patent/JPS59107496U/en
Publication of JPS59107496U publication Critical patent/JPS59107496U/en
Application granted granted Critical
Publication of JPS623915Y2 publication Critical patent/JPS623915Y2/ja
Granted legal-status Critical Current

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  • General Induction Heating (AREA)

Description

【考案の詳細な説明】 本考案は装置の部分的損傷を極めて小さく抑え
ることの出来る制御手段を備えた高周波加熱装置
に関する。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a high-frequency heating device equipped with a control means that can minimize partial damage to the device.

近年、高周波加熱はろう付、はんだ付、溶接、
鍛造加熱、溶解、単結晶引上装置、エピタキシヤ
ル装置、蒸着装置等に応用されており、特にパイ
プ溶接、鍛造加熱及び焼入れにおいては威力を発
揮している。
In recent years, high frequency heating has been used for brazing, soldering, welding,
It is applied to forging heating, melting, single crystal pulling equipment, epitaxial equipment, vapor deposition equipment, etc., and is especially effective in pipe welding, forging heating, and quenching.

さて、この様な高周波加熱装置には以下に記述
する様な問題がある。
Now, such a high frequency heating device has problems as described below.

例えば、高周波抵抗溶接や直接通電型焼入れで
は、高周波電源からの高周波電流を、該電源と被
加熱物のインピーダンス整合用の出力変圧器を介
して接触子に流し、該接触子を通じて被加熱物の
必要箇所に高周波電流を流す様にしている。又、
高周波誘導溶接や高周波誘導焼入れでは高周波電
源からの高周波電流を出力変圧器を介して加熱コ
イルに流し、被加熱物の必要箇所に誘導電流が流
れる様にしている。しかし、前者の場合、機械的
振動等により接触子と被加熱物が接触不良に陥つ
た場合、又、後者の場合、出力変圧器の二次側に
接続されたコイルホルダーと加熱コイルとの接触
が不良に陥つた場合、接触子と被加熱物の間又は
ホルダーと加熱コイルとの間にアーク放電が生
じ、被加熱物と接触子又はホルダーと加熱コイル
が溶損してしまい、復旧に多大な時間と費用が掛
かつてしまう。
For example, in high-frequency resistance welding and direct current hardening, a high-frequency current from a high-frequency power source is passed through a contactor through an output transformer for impedance matching of the power source and the object to be heated. It allows high frequency current to flow where it is needed. or,
In high-frequency induction welding and high-frequency induction hardening, a high-frequency current from a high-frequency power source is passed through a heating coil through an output transformer, so that the induced current flows to the necessary parts of the object to be heated. However, in the former case, there is poor contact between the contact and the heated object due to mechanical vibration, etc., and in the latter case, there is contact between the coil holder connected to the secondary side of the output transformer and the heating coil. If the device becomes defective, an arc discharge will occur between the contact and the heated object or between the holder and the heating coil, and the heated object and the contact or the holder and the heating coil will be melted and damaged, resulting in a large amount of trouble to recover. It costs time and money.

本考案はこの様な問題を解決する為になされた
もので、高周波電源側の電圧と出力変圧器の二次
側電圧との比が許容範囲を越えた時、高周波電源
を切る様な制御手段を設け、装置の部分的損傷を
極めて小さく抑える様にした新規な高周波加熱装
置を提供するものである。
The present invention was developed to solve these problems, and is a control means that turns off the high-frequency power supply when the ratio between the voltage on the high-frequency power supply side and the secondary voltage of the output transformer exceeds a permissible range. The present invention provides a novel high-frequency heating device in which partial damage to the device is minimized.

第1図は本考案の一実施例として示した高周波
抵抗溶接装置の概略図である。
FIG. 1 is a schematic diagram of a high frequency resistance welding apparatus shown as an embodiment of the present invention.

図中1は高周波電源で、例えば、第2図に示す
如き、三極電子管2、プレート電源3、フイラメ
ント加熱電源4、直流カツト用コンデンサ5及び
発振状態調整機能と負荷整合機能を備えた回路6
から成る真空管発振器で構成されている。9は、
該電源と被溶接物(管材)10のインピーダンス
整合用の出力変圧器である。11A,11Bは管
材10の隣接する縁に置かれた接触子で、前記出
力変圧器9を介した前記高周波電源1からの高周
波電圧が両接触子間に印加される。12A,12
Bは矢印方向に回転し、前記管材10の接合点を
圧接するスクイズロールである。13は前記出力
変圧器9の二次側電圧を整流するための整流器で
ある。14は、該整流器の出力と、前記高周波電
源1側の電圧、例えばプレート電圧との比を取
り、該比の値が許容値を越えた時に、前記高周波
電源1(例えばプレート電源3)を切る信号を発
する制御回路である。
In the figure, 1 is a high-frequency power source, for example, as shown in FIG. 2, a triode electron tube 2, a plate power source 3, a filament heating power source 4, a DC cut capacitor 5, and a circuit 6 with an oscillation state adjustment function and a load matching function.
It consists of a vacuum tube oscillator. 9 is
This is an output transformer for impedance matching between the power source and the object (tube material) 10 to be welded. 11A and 11B are contacts placed on adjacent edges of the tube 10, and a high frequency voltage from the high frequency power source 1 via the output transformer 9 is applied between both contacts. 12A, 12
B is a squeeze roll that rotates in the direction of the arrow and presses the joints of the tubes 10. 13 is a rectifier for rectifying the secondary voltage of the output transformer 9. 14 calculates the ratio between the output of the rectifier and the voltage on the side of the high frequency power source 1, for example, the plate voltage, and turns off the high frequency power source 1 (for example, the plate power source 3) when the value of the ratio exceeds a permissible value. This is a control circuit that emits signals.

斯くの如き装置において、高周波電源1(真空
管発振器)の出力は出力変圧器9により変圧さ
れ、接触子11A,11B間に印加される。する
と、高周波電流は接触子間を継ぐ管材10のV字
形端面に沿つて図の点線の様に流れる。その為、
高周波電流による加熱効果は端面に集中し、その
接合点は圧接温度になり、スクイズロールによる
圧接により、連続した溶接管が出来上がる。さ
て、この溶接過程において、何等かの原因によ
り、前記接触子と管材の接触が不良となつた場
合、制御回路14は次の様に動作する。一般に高
周波電源側の電圧と出力変圧器9の二次側電圧は
大略比例関係にある。本実施例では高周波電源側
の電圧として、例えばプレート電圧を上げている
が、出力変圧器9の二次側電圧とプレート電圧の
比の値が大略1/25の場合を考える。又、出力変圧
器9の二次側電圧は被加熱物の加熱状態等により
少し変化する。従つて、この点を考慮して、制御
回路14には予め、基準値として1/25±αの値
がセツトされている。而して、接触子と管材の接
触不良により、該接触子と管材の間にアーク放電
が生じると、前記出力変圧器9の二次側電圧は通
常の値の2〜5倍高くなる。すると、前記制御回
路14は、プレート電圧と出力変圧器の二次側電
圧の比の値が基準値より大略2〜5倍高くなるこ
とを検出し、前記プレート電源3を切る信号を発
する。
In such a device, the output of a high frequency power source 1 (vacuum tube oscillator) is transformed by an output transformer 9 and applied between contacts 11A and 11B. Then, the high frequency current flows along the V-shaped end surface of the tube 10 connecting the contacts as shown by the dotted line in the figure. For that reason,
The heating effect caused by the high-frequency current is concentrated on the end face, and the welding point reaches the pressure welding temperature, and a continuous welded tube is completed by pressure welding with the squeeze roll. Now, in this welding process, if the contact between the contactor and the tube material becomes poor for some reason, the control circuit 14 operates as follows. Generally, the voltage on the high frequency power supply side and the secondary side voltage of the output transformer 9 are approximately in a proportional relationship. In this embodiment, for example, the plate voltage is increased as the voltage on the high frequency power supply side, but let us consider a case where the ratio of the secondary side voltage of the output transformer 9 to the plate voltage is approximately 1/25. Further, the secondary voltage of the output transformer 9 changes slightly depending on the heating state of the object to be heated and the like. Therefore, in consideration of this point, a value of 1/25±α is set in advance in the control circuit 14 as a reference value. When arc discharge occurs between the contact and the tube due to poor contact between the contact and the tube, the secondary voltage of the output transformer 9 becomes two to five times higher than the normal value. Then, the control circuit 14 detects that the ratio of the plate voltage to the secondary voltage of the output transformer is about 2 to 5 times higher than the reference value, and issues a signal to turn off the plate power supply 3.

尚、前記実施例では高周波電源側の電圧として
プレート電圧を検出する様にしたが、真空管発振
器の出力、即ち、出力変圧器9の一次側電圧を検
出する様にしてもよい。但し、この場合、整流し
てから制御回路14に送られる。又、前記アーク
放電により出力電圧器の二次側電圧が大幅に変化
するが、一次側電圧は、真空管発振器により一定
電圧になる様にコントロールされているので、多
少の変化はあるが、大きな変化はなく、この多少
の変化も考慮して制御回路の基準値が設定され
る。
In the above embodiment, the plate voltage is detected as the voltage on the high frequency power supply side, but the output of the vacuum tube oscillator, that is, the primary voltage of the output transformer 9 may be detected. However, in this case, the signal is sent to the control circuit 14 after being rectified. Also, the secondary voltage of the output voltage generator changes significantly due to the arc discharge, but since the primary voltage is controlled to be a constant voltage by the vacuum tube oscillator, there is a slight change, but it is not a large change. Therefore, the reference value of the control circuit is set by taking this slight change into account.

又、高周波電源として第3図に示す如き、電動
機15、発電機16及び力率改善用コンデンサ1
7から成る電動発電機を用い、該発電機の出力を
整流したものと出力変圧器9の二次側電圧を検出
し、アーク放電が起つた時に電動機15の電源を
切る様にしてもよい。又、高周波電源として第4
図に示す如き交流電源18、順変換回路19、逆
変換回路20から成るサイリスタインバータを用
い、逆変換回路20の出力を整流したものと出力
変圧器9の二次側電圧を検出し、アーク放電が起
つた時に、交流電源18を切る様にしてもよい。
In addition, as a high frequency power source, a motor 15, a generator 16, and a power factor correction capacitor 1 as shown in FIG.
7, the output of the generator may be rectified and the secondary voltage of the output transformer 9 may be detected to turn off the power to the motor 15 when arc discharge occurs. Also, as a high frequency power source, the fourth
A thyristor inverter consisting of an AC power supply 18, a forward conversion circuit 19, and an inverse conversion circuit 20 as shown in the figure is used to detect the rectified output of the inverse conversion circuit 20 and the secondary voltage of the output transformer 9, and discharge arc discharge. The AC power supply 18 may be turned off when this occurs.

又、前記実施例では、接触子と被加熱物の接触
下良の場合について説明したが、高周波誘導加熱
の如き高周波電源からの高周波電力を出力変圧器
及び加熱コイルホルダーを介して被加熱物を誘導
加熱する為の加熱コイルに供給する様にした装置
において、前記ホルダーと加熱コイルの接触不良
からアーク放電が起つた場合にも応用出来る。
In addition, in the above embodiment, the case where the contact between the contact and the object to be heated was explained was explained. In a device designed to supply a heating coil for induction heating, it can also be applied when arc discharge occurs due to poor contact between the holder and the heating coil.

本考案によれば、高周波加熱装置において、接
触子と被加熱物又は加熱コイルホルダーと加熱コ
イルとの接触が不良になり、これらの間にアーク
放電が生じても瞬時に高周波電源を切る用にして
いるので、接触子や被加熱物又はホルダーや加熱
コイル等の溶損を防止することが出来、復旧に多
大な時間や費用が掛かることがない。
According to the present invention, in a high-frequency heating device, even if the contact between the contact and the object to be heated or the heating coil holder and the heating coil becomes poor and arc discharge occurs between them, the high-frequency power can be instantly turned off. Therefore, it is possible to prevent melting and damage of contacts, objects to be heated, holders, heating coils, etc., and restoration does not require a great deal of time and cost.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本考案の一実施例を示した高周波抵抗
溶接装置の概略図、第2図〜第4図は高周波電源
の例を示したものである。 1:高周波電源、9:管材、10:出力変圧
器、11A,11B:接触子、13:整流器、1
4:制御回路。
FIG. 1 is a schematic diagram of a high frequency resistance welding device showing an embodiment of the present invention, and FIGS. 2 to 4 show examples of a high frequency power source. 1: High frequency power supply, 9: Pipe material, 10: Output transformer, 11A, 11B: Contact, 13: Rectifier, 1
4: Control circuit.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 高周波電源、該電源と被加熱物のインピーダン
ス整合用の出力変圧器、該変圧器の二次側電圧を
被加熱物へ供給する為の接触子又は加熱コイルか
ら成る装置において、前記高周波電源側の電圧と
前記出力変圧器の二次側電圧との比が許容範囲を
越えた時、前記高周波電源を切る制御手段を設け
た高周波加熱装置。
In a device consisting of a high frequency power source, an output transformer for impedance matching between the power source and the heated object, and a contactor or heating coil for supplying the secondary side voltage of the transformer to the heated object, the high frequency power source side A high-frequency heating device comprising a control means for turning off the high-frequency power supply when a ratio between a voltage and a secondary voltage of the output transformer exceeds a permissible range.
JP140983U 1983-01-10 1983-01-10 High frequency heating device Granted JPS59107496U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP140983U JPS59107496U (en) 1983-01-10 1983-01-10 High frequency heating device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP140983U JPS59107496U (en) 1983-01-10 1983-01-10 High frequency heating device

Publications (2)

Publication Number Publication Date
JPS59107496U JPS59107496U (en) 1984-07-19
JPS623915Y2 true JPS623915Y2 (en) 1987-01-28

Family

ID=30133136

Family Applications (1)

Application Number Title Priority Date Filing Date
JP140983U Granted JPS59107496U (en) 1983-01-10 1983-01-10 High frequency heating device

Country Status (1)

Country Link
JP (1) JPS59107496U (en)

Also Published As

Publication number Publication date
JPS59107496U (en) 1984-07-19

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