DE913455C - Inductor for heating the inner surface of cylindrical bodies - Google Patents

Inductor for heating the inner surface of cylindrical bodies

Info

Publication number
DE913455C
DE913455C DEA9063D DEA0009063D DE913455C DE 913455 C DE913455 C DE 913455C DE A9063 D DEA9063 D DE A9063D DE A0009063 D DEA0009063 D DE A0009063D DE 913455 C DE913455 C DE 913455C
Authority
DE
Germany
Prior art keywords
inductor
heating
cylindrical bodies
workpiece
guide body
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
DEA9063D
Other languages
German (de)
Inventor
Dr-Ing Karl Schoenbacher
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AEG AG
Original Assignee
AEG AG
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 by AEG AG filed Critical AEG AG
Priority to DEA9063D priority Critical patent/DE913455C/en
Application granted granted Critical
Publication of DE913455C publication Critical patent/DE913455C/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/36—Coil arrangements
    • H05B6/38—Coil arrangements specially adapted for fitting into hollow spaces of workpieces

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Induction Heating (AREA)

Description

Bei der Innenhärtung längerer Rohre ist es wesentlich, daß zwischen der eigentlichen Spule und dem Werkstück kein Spannungsunterschied besteht, der etwa zu Überschlägen und damit zu Beschädigungen gewisser Stellen im Rohr führen könnte. Darüber hinaus ist es notwendig, daß die Spule im genauen Abstand von der Rohrwand geführt wird, um eine stets gleichbleibende Härtetiefe zu erreichen.When internally hardening longer pipes, it is essential that between there is no voltage difference between the actual coil and the workpiece lead to flashovers and thus damage to certain points in the pipe could. In addition, it is necessary that the coil is at the precise distance from the Pipe wall is guided in order to achieve a constant hardening depth.

Gemäß der Erfindung wird dem Spulenkörper eine Führungseinrichtung zugeordnet, die nicht nur den Spulenabstand gegen das Werkstück genau innehält, sondern gleichzeitig als gute Kontaktgabe zum Werkstück ausgebildet ist, so daß besondere Zuleitungen gespart werden können. Vorteilhaft wird diese Führungseinrichtung potentialmäßig mit der Mitte der Spule verbunden. Die Kontaktgabe zwischen Führungskörper und Werkstück kann durch schleifende Kontaktstücke bewirkt werden, wie es in Fig. i beispielsweise angedeutet ist. Es kann außerdem zweckmäßig sein, wenn der Induktor neben der Vorschubbewegung eine Drehbewegung ausführt, die Kontaktgabe entsprechend den beiden Bewegungsrichtungen zu unterteilen, und zwar derart, daß der Führungskörper gegenüber dem Werkstück nur oder bei gezogenen Läufen fast nur die Axialbewegungsrichtung durchführt und hierfür besondere Federkontakte enthält, während zwischen Führungskörper und Spulenkörper nur die Rotationsbewegung erfolgt, wobei hierfür besondere Federn und Kontaktflächen vorgesehen sind.According to the invention, the bobbin becomes a guide device assigned, which not only precisely maintains the distance between the coils and the workpiece, but is also designed as a good contact to the workpiece, so that special supply lines can be saved. This guide device is advantageous connected to the center of the coil in terms of potential. The contact between the guide body and workpiece can be effected by sliding contact pieces, as shown in Fig. i is indicated for example. It can also be useful if the inductor executes a rotary movement in addition to the feed movement, making the contact accordingly to subdivide the two directions of movement, in such a way that the guide body compared to the workpiece only or, in the case of drawn barrels, almost only the direction of axial movement carries out and for this purpose contains special spring contacts, while between the guide body and bobbin only the rotational movement takes place, with special springs for this purpose and contact surfaces are provided.

Ein Ausführungsbeispiel i'st in Fig. 2 dargestellt. Der Führungskörper i ist über Kontakte :2 im Rohr 3 bzw. dessen Zügen geführt. Der Induktor q. mit den Windungen 5 ist im Führungskörper drehbar gelagert und über Kontakte 6 an ihn angeschlossen, so daß eine leitende Verbindung zwischen dem Rohr 3 und den Windungen 5, vorzugsweise ihrem Mittelpunkt 7 besteht.An exemplary embodiment is shown in FIG. The guide body i is carried out via contacts: 2 in tube 3 or its trains. The inductor q. with the turns 5 is rotatably mounted in the guide body and connected to it via contacts 6 connected, so that a conductive connection between the tube 3 and the turns 5, preferably its center 7 consists.

Claims (2)

PATENTANSPRÜCHE: i. Induktor zur Erhitzung der inneren Oberfläche von zylindrischen Körpern, dadurch gekennzeichnet, daß er mit Abstandhaltern versehen ist, die gleichzeitig zur Zuleitung des Stromes dienen. PATENT CLAIMS: i. Inductor for heating the inner surface of cylindrical bodies, characterized in that it is provided with spacers is, which serve at the same time to supply the current. 2. Induktor nach Anspruch i, dadurch gekennzeichnet, daß er drehbar in den Abstandhaltern gelagert und mit diesen bzw. deren Führungskontakten über Schleifkontakte verbunden ist.2. inductor according to claim i, characterized in that it is rotatably mounted in the spacers and with these or their guide contacts is connected via sliding contacts.
DEA9063D 1942-03-14 1942-03-14 Inductor for heating the inner surface of cylindrical bodies Expired DE913455C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEA9063D DE913455C (en) 1942-03-14 1942-03-14 Inductor for heating the inner surface of cylindrical bodies

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA9063D DE913455C (en) 1942-03-14 1942-03-14 Inductor for heating the inner surface of cylindrical bodies

Publications (1)

Publication Number Publication Date
DE913455C true DE913455C (en) 1954-06-14

Family

ID=6921665

Family Applications (1)

Application Number Title Priority Date Filing Date
DEA9063D Expired DE913455C (en) 1942-03-14 1942-03-14 Inductor for heating the inner surface of cylindrical bodies

Country Status (1)

Country Link
DE (1) DE913455C (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0453735A1 (en) * 1990-04-25 1991-10-30 Mercedes-Benz Ag Apparatus for internal induction heating of cylinder liners of combustion engines for hardening said liners
DE19544824A1 (en) * 1995-08-23 1997-02-27 Rheinmetall Ind Ag Drawn gun barrel and method of making such a barrel
FR2738058A1 (en) * 1995-08-23 1997-02-28 Rheinmetall Ind Gmbh RAYWALL ARM TUBE AND METHOD OF MAKING A TUBE OF THIS TYPE

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0453735A1 (en) * 1990-04-25 1991-10-30 Mercedes-Benz Ag Apparatus for internal induction heating of cylinder liners of combustion engines for hardening said liners
DE19544824A1 (en) * 1995-08-23 1997-02-27 Rheinmetall Ind Ag Drawn gun barrel and method of making such a barrel
FR2738058A1 (en) * 1995-08-23 1997-02-28 Rheinmetall Ind Gmbh RAYWALL ARM TUBE AND METHOD OF MAKING A TUBE OF THIS TYPE
DE19544824C2 (en) * 1995-08-23 1998-06-04 Rheinmetall Ind Ag Drawn gun barrel and method of making such a barrel

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