DE1064657B - Ironless inductor for electroinductive soldering of sheet metal - Google Patents

Ironless inductor for electroinductive soldering of sheet metal

Info

Publication number
DE1064657B
DE1064657B DEL28765A DEL0028765A DE1064657B DE 1064657 B DE1064657 B DE 1064657B DE L28765 A DEL28765 A DE L28765A DE L0028765 A DEL0028765 A DE L0028765A DE 1064657 B DE1064657 B DE 1064657B
Authority
DE
Germany
Prior art keywords
soldering
inductor
ironless
sheet metal
electroinductive
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.)
Pending
Application number
DEL28765A
Other languages
German (de)
Inventor
Siegfried Lattka
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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs GmbH
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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Priority to DEL28765A priority Critical patent/DE1064657B/en
Publication of DE1064657B publication Critical patent/DE1064657B/en
Priority to BE614082A priority patent/BE614082A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K1/00—Soldering, e.g. brazing, or unsoldering
    • B23K1/002—Soldering by means of induction heating

Description

Eisenloser Induktor zum elektroinduktiven Löten von Blechen Es ist bekannt, Bleche mittels induktiver Erhitzung stumpf aneinanderstoßend zu verlöten. Hierzu wurde der Haarnadelinduktor verwandt, der in seiner Längsrichtung so über die zu lötende Spaltstelle gebracht wurde, daß der Induktor symmetrisch zur Spaltlinie lag. Ein weiterer vorbekannter Induktor entstand aus dem einfachen Haarnadelinduktor in der Weise, daß der eine Leiter unmittelbar über den Lötspalt gelegt wurde und der Rückleiter sich verzweigte und links und rechts des Hinleiters zurückgeführt wurde. Im Betrieb hat sich gezeigt, daß, offenbar infolge unvermeidbarer Ungenauigkeiten in der Anpassung der Werkstücke an den Induktor, es während des Aufheizvorganges zu kleinen Lichtbogenerscheinungen zwischen den Blechen kam, so daß diese, insbesondere dünne Bleche, an den Stoßkanten verbrannten. Die hierfür ursächlichen Potentialdifferenzen zwischen den beiden zu lötenden Blechen sind im praktischen Betrieb, insbesondere bei der Massenfertigung, schwer zu vermeiden.Ironless inductor for electro-inductive soldering of sheet metal It is known to solder sheets butt against each other by means of inductive heating. For this purpose, the hairpin inductor was used, which is so over in its longitudinal direction the gap to be soldered was brought so that the inductor is symmetrical to the gap line lay. Another previously known inductor emerged from the simple hairpin inductor in such a way that one conductor was placed directly over the soldering gap and the return conductor branched out and returned to the left and right of the outward conductor became. In operation it has been shown that, apparently as a result of unavoidable inaccuracies in the adaptation of the workpieces to the inductor, it during the heating process to small arcing phenomena between the sheets, so that this, in particular thin metal sheets, burned at the edges. The potential differences causing this between the two sheets to be soldered are in practical operation, in particular in mass production, difficult to avoid.

Gemäß der Erfindung wird nun ein eisenloser Induktor zum elektroinduktiven Löten von Blechen, insbesondere von stumpf aneinanderstoßenden dünnen Blechen, vorgeschlagen, der dadurch gekennzeichnet ist, daß beidseitig des Lötspaltes je eine haarnadelförmige Schleife derart von dem Hochfrequenzerzeuger gespeist ist, daß die beiden inneren, dem Lötspalt am nächsten liegenden Leiter gleiche Stromrichtung haben, wobei der mittlere Abstand dieser beiden Leiter voneinander mindestens gleich ihrem Abstand zu den Außenleitern gewählt ist.According to the invention, an ironless inductor is now electroinductive Soldering of sheets, in particular of butt butted thin sheets, suggested, which is characterized in that on both sides of the soldering gap each a hairpin-shaped Loop is fed by the high frequency generator in such a way that the two inner, the conductor closest to the soldering gap have the same current direction, with the mean distance between these two conductors at least equal to their distance is chosen to the outer conductors.

Mit diesem Induktor wird eine funkenfreie Lötung erzielt, weil die Lötstelle im wesentlichen indirekt erwärmt wird. Die Stromrichtung im Induktor ist so, daß der Lötspalt in einer Zone liegt, in der das hyperbolisch abfallende Magnetfeld durch das Feld des Gegenleiters praktisch aufgehoben ist. Der Abstand der Heizleiterschleifen vom Lötspalt soll ein Vielfaches der Breite des Lötspaltes betragen.With this inductor a spark-free soldering is achieved because the Solder joint is heated essentially indirectly. The direction of current in the inductor is so that the soldering gap lies in a zone in which the hyperbolically falling magnetic field is practically canceled by the field of the opposing conductor. The distance between the heating conductor loops of the soldering gap should be a multiple of the width of the soldering gap.

Die Zeichnung zeigt schematisch einen Induktor gemäß der Erfindung: Mit 1 und 2 sind die zu lötenden Bleche bezeichnet. 3 ist ein HF-Erzeuger. Der Heizleiter 4 ist zur Ausübung des Verfahrens gemäß der Erfindung ausgebildet. Das magnetische Feld um die beiden Leiter 5 und 6 fällt hyperbolisch zum Lötspalt hin ab und hebt sich in der Nähe des Luftspaltes, wie die Pfeile andeuten, auf. Dadurch werden dort praktisch keine Spannungen induziert, die zu Lichtbogenerscheinungen zwischen den Blechen führen könnten.The drawing shows schematically an inductor according to the invention: With 1 and 2, the sheets to be soldered are designated. 3 is an RF generator. The heating conductor 4 is designed to carry out the method according to the invention. The magnetic one The field around the two conductors 5 and 6 drops hyperbolically towards the soldering gap and lifts near the air gap, as indicated by the arrows. This will be there practically no voltages induced, leading to arcing between the Sheet metal could lead.

Claims (1)

pA;. KNTANSPRUCH: Eisenloser Induktor zum elektroinduktiven Löten von Blechen, insbesondere von stumpf aneinanderstoßenden dünnen Blechen, dadurch gekennzeichnet, daß beidseitig des Lötspaltes je eine haarnadelförmige Schleife derart von dem Hochfrequenzerzeuger gespeist ist, daß die beiden inneren, dem Lötspalt am nächsten liegenden Leiter gleiche Stromrichtung haben, wobei der mittlere Abstand dieser beiden Leiter voneinander mindestens gleich ihrem Abstand zu den Außenleitern gewählt ist. In Betracht gezogene Druckschriften: Deutsche Patentschrift Nr. 249 080; USA.-Patentschriften Nr. 2 460 687, 2 024 906.pA ;. CLAIM: Ironless inductor for electro-inductive soldering of sheet metal, in particular of butt butted thin sheets, thereby characterized in that a hairpin-shaped loop on both sides of the soldering gap is fed by the high frequency generator in such a way that the two inner ones, the soldering gap the conductors closest to each other have the same direction of current, with the mean distance these two conductors from each other at least equal to their distance from the outer conductors is chosen. Publications considered: German Patent No. 249 080; U.S. Patent Nos. 2,460,687, 2,024,906.
DEL28765A 1957-10-04 1957-10-04 Ironless inductor for electroinductive soldering of sheet metal Pending DE1064657B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DEL28765A DE1064657B (en) 1957-10-04 1957-10-04 Ironless inductor for electroinductive soldering of sheet metal
BE614082A BE614082A (en) 1957-10-04 1962-02-19 Electrical recording apparatus with recording paper resting motionless between two families of crossed conductors.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEL28765A DE1064657B (en) 1957-10-04 1957-10-04 Ironless inductor for electroinductive soldering of sheet metal

Publications (1)

Publication Number Publication Date
DE1064657B true DE1064657B (en) 1959-09-03

Family

ID=7264639

Family Applications (1)

Application Number Title Priority Date Filing Date
DEL28765A Pending DE1064657B (en) 1957-10-04 1957-10-04 Ironless inductor for electroinductive soldering of sheet metal

Country Status (1)

Country Link
DE (1) DE1064657B (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE249080C (en) *
US2024906A (en) * 1932-03-11 1935-12-17 Wisconsin Alumni Res Found Method of heating electrically conducting bodies
US2460687A (en) * 1945-03-31 1949-02-01 Republic Steel Corp Induction heater

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE249080C (en) *
US2024906A (en) * 1932-03-11 1935-12-17 Wisconsin Alumni Res Found Method of heating electrically conducting bodies
US2460687A (en) * 1945-03-31 1949-02-01 Republic Steel Corp Induction heater

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