DE730356C - Process for electrical induction heating of sheet metal - Google Patents
Process for electrical induction heating of sheet metalInfo
- Publication number
- DE730356C DE730356C DEF84017D DEF0084017D DE730356C DE 730356 C DE730356 C DE 730356C DE F84017 D DEF84017 D DE F84017D DE F0084017 D DEF0084017 D DE F0084017D DE 730356 C DE730356 C DE 730356C
- Authority
- DE
- Germany
- Prior art keywords
- sheet metal
- induction heating
- tools
- electrical induction
- electrical
- 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
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
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Induction Heating (AREA)
Description
Verfahren-zur elektrischen Induktionserhitzung von Blechen Die Erwärmung von Blechen. zwecks Verformung mittels elektrischer Wirbelströme während des Bearbeitungsvorganges ist bmreits bekannt.Process-for electrical induction heating of sheet metal The heating of sheet metal. for the purpose of deformation by means of electrical eddy currents during the machining process is already known.
Die Erfindung bezieht sich auf ein Verfahren zur elektrischen Induktionserhitzung von Blechen, insbesondere von im Flugzeugbau verwendeten Blechen aus Magnesiumlegierun,gen, die mittels beiderseits der Bleche gegeneinander beweglicher Werkzeuge warm verformt werden sollen.The invention relates to a method for electrical induction heating of sheet metal, especially sheet metal made of magnesium alloys used in aircraft construction, which are thermoformed by means of tools that can move against one another on both sides of the sheet metal should be.
Die Erfindung besteht darin, daß Wechselstrom, insbesondere Hochfrequenzstram, parallel zur Blechebene durch die aber und untere dem Blech liegenden Werkzeuge gischäiekt wird.The invention consists in that alternating current, in particular high frequency current, parallel to the plane of the sheet through the tools that are but and lower than the sheet metal is gischäiekt.
Die Bearbeltumg von Blechen aus Mag nesiwmlcgierumgen stieß bisher auf erhebliche Schwierigkeiten, da bekanntlich gerade die Esektronbleche mit zunehmender Festigkeit s2 spröde werden, daß sich bei ihrer W!rformung ungeahnte Schwierigkeitwi bisher entgegenstellten. Diie Verformung dieser Elektrombleche ließ sich bisher ohne Festigkeitsverlust und ohne Rißbildung nur für einen ganz engen Temperaturbexei:ch durchführen. Dabei kommt es besonders darauf an, die ,genaue Einhaltung eines TempeTaturintervalls, das z. B. 320-I- io°-haben soll, einzuhalten. Dieses war bisher im rauhen Werkstattbetrieb ;mit anderen Mitteln, wie beispielsweise Gasbrennern, Heißluftgeräten, undurchführbar.The processing of sheet metal made of magnesia has been an issue so far to considerable difficulties, as it is well known that the Esektronbleche with increasing Strength s2 become brittle, that unimagined difficulties arise in their deformation previously opposed. The deformation of these electrical sheets has been possible so far without loss of strength and without cracking only for a very narrow temperature range carry out. It is particularly important that a temperature interval is strictly adhered to, the Z. B. 320-I- io ° -have to adhere to. This was previously in rough workshop operation ; impracticable by other means, such as gas burners, hot air devices.
Die Erfindung ermöglicht eine außerordentlich ;einfache und werkstattmäßig bequem durchzuführende Warmverformung. Ohne daß mit Ausschuß zu rechnen ist, wird' eine stetige gleichbleibende Temperatur aufrechterhalten, so daß.das Blech ungewollten Verformungen durch örtliehe Entspannung o. dgl. nicht ausgesetzt ist, Bei -einer Verrichtung zur Ausführung des Verfahre üs sind erfindungsgemäß die beic gegeneinander beweglichen Werkzeuge einander isoliert.The invention enables an extraordinarily simple and workshop-like easy to perform hot forming. Without rejection to be expected, ' maintain a steady constant temperature, so that Sheet metal unwanted deformations due to local relaxation or the like. Not exposed is, in -a task to carry out the process are according to the invention the mutually movable tools isolate each other.
In der ?eichnung ist beispielsweise schematisch eine zur Durchführung des Verfahrens geeignete Vrnrrichtung veranschaulicht.In the drawing, for example, one for implementation is schematically shown the appropriate device for the procedure is illustrated.
Die Verformung des Bleches erfolgt durch die Anwendmg eines Wechselstromes, insbesondere hochfrequenten. Wechselstromes, großer Stromstärke und kleiner Spannung. Aus einem Wechselstromnetz wird Strom esnem Transformator zugeführt, der bei ganz kleiner Spannung große Stromstärken abzugeben imstande ist.The sheet metal is deformed by applying an alternating current, especially high frequency. Alternating current, high amperage and low voltage. Electricity is supplied from an alternating current network to a transformer, which is completely low voltage is able to deliver large currents.
Däe Elekttonbleche i werden nicht als Stromträger benutzt, sondern. durch die über und unter dem Blech liegenden Werkzeuge, beispielsweise Verfonnungsschienen 2, 3, wir& von dem Trdnsforma%r Wechselstrom, insbesondere Hochfrequenzstrom, parallel zur Blechebene geschickt. Unabhängig von der Berührung warmer oder wärmerer Werkstücke gelingt es durch die Anwendung dieser Werkzeuge 2, 3, innerhalb der zu verarbeitenden Bleche eine konstante Temperatur zu erzeugen, bei der die Verarbeitung, also irgendeine gewünschte Verformung, beispielsweise Biegen, .Prägen, Abkanten o, dgl., ohne Schwierigkeiten vorgenommen - w erden kann.The Elekttonbleche i are not used as a current carrier, but. by the tools lying above and below the sheet metal, for example molding rails 2, 3, we & from the Trdnsforma% r alternating current, especially high frequency current, sent parallel to the sheet plane. Regardless of the touch, warmer or warmer Workpieces are made possible by using these tools 2, 3 within the to to generate a constant temperature for the processing metal sheets, at which the processing, Any desired deformation, for example bending, embossing, folding o, like., made without difficulty - w ith can.
Die Arbeitsweise ist derart, daß dass Blech in eine geeignete Vexformungsklemme eingespannt wird. Der Strom wird. eingeschaltet. Das Blechband wird dadurch entsprechend dein durchgehenden Strom, ohne daß die Werkzeugschienen 2, 3 das Blech berühr-en, infolge Induktionserhitzung die vorgeschriebene Temperatur annehmen. -Dann werden die Werkzeuge, .die beispielsweise unter einer Presse angeordnet sind, zusammengedrückt und mit der Verformung des Bleches begonnen. Die Verformung kann dabei stufenweise erfolgen, und nach jeder Stufe kann der Strom abgeschaltet werden, die Pressegelöst und das Blechband wieder etwas ,veiter unter die Presse geschoben werden. Man kann au!f diese Weise Profile beliebiger Länge, höchster Genauigkeit bei ganz einwandfreier Materialbeschaffenheit durch Einhaltung sicherer Temperaturgrenzen herstellen.The way of working is that the sheet metal is in a suitable deformation clamp is clamped. The stream will. switched on. The sheet metal strip is thereby accordingly your continuous current without the tool rails 2, 3 touching the sheet metal, assume the prescribed temperature due to induction heating. -Then be the tools, which are arranged, for example, under a press, are pressed together and started to deform the sheet. The deformation can be gradual take place, and after each stage the power can be switched off, the press released and the sheet metal band can be pushed a little further under the press. One can In this way, profiles of any length, maximum accuracy and perfectly flawless Establish material properties by maintaining safe temperature limits.
Es ist von Vorteil, -bei der Induktionserhitzung die Stromschleifen klein zu halteai, indem der Leiber unter Vermeidung von Verlusten. die beiden Pole des Transformators in einer möglichst kleinen Schleife verbindet. Duzch Regeln der Frequenz bzw. ist es möglich, die durch den Leiter (Werkzeugschienen) transportierten elektrischen Mengen im voraus festzulegen.It is an advantage to - with induction heating the current loops to keep the bodies small by avoiding losses. the two poles of the transformer in the smallest possible loop. By rules of the Frequency or is it possible to be transported through the ladder (tool rails) electrical quantities to be determined in advance.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEF84017D DE730356C (en) | 1937-11-21 | 1937-11-21 | Process for electrical induction heating of sheet metal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEF84017D DE730356C (en) | 1937-11-21 | 1937-11-21 | Process for electrical induction heating of sheet metal |
Publications (1)
Publication Number | Publication Date |
---|---|
DE730356C true DE730356C (en) | 1943-01-11 |
Family
ID=7114206
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEF84017D Expired DE730356C (en) | 1937-11-21 | 1937-11-21 | Process for electrical induction heating of sheet metal |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE730356C (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1017716B (en) * | 1952-08-29 | 1957-10-17 | Siemens Ag | Support mandrel in a device for linear inductive heating of the solder seam of tin cans |
DE968294C (en) * | 1950-01-10 | 1958-01-30 | Licentia Gmbh | Device for precise forging of turbine blades in the die |
DE969031C (en) * | 1950-03-04 | 1958-04-24 | Schoppe & Faeser Feinmechanik | Arrangement for inductive heating of metallic workpieces |
DE1150463B (en) * | 1961-05-31 | 1963-06-20 | Commissariat Energie Atomique | Device for hot pressing, in particular for forming a mounting bead |
DE976384C (en) * | 1944-03-16 | 1963-08-01 | Deutsche Edelstahlwerke Ag | Method for producing spherical upsets on hollow bodies |
DE1565581B1 (en) * | 1965-10-21 | 1972-05-31 | Heller William Charles Jun | Device for inductive welding of plastic parts |
-
1937
- 1937-11-21 DE DEF84017D patent/DE730356C/en not_active Expired
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE976384C (en) * | 1944-03-16 | 1963-08-01 | Deutsche Edelstahlwerke Ag | Method for producing spherical upsets on hollow bodies |
DE968294C (en) * | 1950-01-10 | 1958-01-30 | Licentia Gmbh | Device for precise forging of turbine blades in the die |
DE969031C (en) * | 1950-03-04 | 1958-04-24 | Schoppe & Faeser Feinmechanik | Arrangement for inductive heating of metallic workpieces |
DE1017716B (en) * | 1952-08-29 | 1957-10-17 | Siemens Ag | Support mandrel in a device for linear inductive heating of the solder seam of tin cans |
DE1150463B (en) * | 1961-05-31 | 1963-06-20 | Commissariat Energie Atomique | Device for hot pressing, in particular for forming a mounting bead |
DE1565581B1 (en) * | 1965-10-21 | 1972-05-31 | Heller William Charles Jun | Device for inductive welding of plastic parts |
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