DE922368C - Arrangement for electrical resistance welding with current pulses of incomplete period - Google Patents

Arrangement for electrical resistance welding with current pulses of incomplete period

Info

Publication number
DE922368C
DE922368C DEP23600D DEP0023600D DE922368C DE 922368 C DE922368 C DE 922368C DE P23600 D DEP23600 D DE P23600D DE P0023600 D DEP0023600 D DE P0023600D DE 922368 C DE922368 C DE 922368C
Authority
DE
Germany
Prior art keywords
arrangement
resistance welding
electrical resistance
current
current pulses
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
DEP23600D
Other languages
German (de)
Inventor
Georges Levesque Du Rostu
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.)
Automobiles Citroen SA
Original Assignee
Automobiles Citroen SA
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 Automobiles Citroen SA filed Critical Automobiles Citroen SA
Application granted granted Critical
Publication of DE922368C publication Critical patent/DE922368C/en
Expired 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
    • B23K11/00—Resistance welding; Severing by resistance heating
    • B23K11/24—Electric supply or control circuits therefor
    • B23K11/248—Electric supplies using discharge tubes

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Arc Welding Control (AREA)

Description

Die Erfindung bezieht sich auf eine Anordnung zum elektrischen Widerstandsschweißen mittels Energieimpulsen, die ,kleiner als 1/5o Sekunde sind; dabei wird der Transformator unmittelbar -vom Stromnetz aus gespeist, arbeitet systematisch mit halben Wellen oder Bruchteilen halber Wellen gleichen Vorzeichens eines Stromes von annähernd 50 Perioden pro Sekunde und wird zusätzlich dauernd mit gleicher Polarität magnetisiert, die derjenigen entgegengesetzt ist, welche durch die halbe Leistungswelle erzeugt wird.The invention relates to an arrangement for electrical resistance welding by means of energy pulses that are less than 1 / 50th of a second; doing the transformer Directly - fed from the power grid, works systematically with half waves or fractions of half waves of the same sign of a current of approximately 50 periods per second and is additionally magnetized continuously with the same polarity, which is opposite to that generated by half the power wave will.

Die Erfindung bezweckt insbesondere eine vorteilhafte Ausführungsform eines Schweißtransformators, der über ein gleichrichtendes Ventil oder einen Synchronschalter aus dem Wechselstromnetz mit Impulsen nur in einer Richtung gespeist wird und bei dem die hierdurch entstehende Vormagneti. sierung des Transformators durch eine dauernde Gleichstromvormagnetisierung entgegengesetzter Richtung aufgehoben wird.The invention aims in particular to provide an advantageous embodiment a welding transformer, which has a rectifying valve or a synchronous switch is fed from the AC network with pulses in one direction only and at which the resulting pre-magnetism. transformation of the transformer by a permanent DC bias in the opposite direction is canceled.

Gemäß der Erfindung ist der in Richtung der. Gleichstromquelle für dauernde Induktion abgeleitete Impulsstrom durch eine Drosselspule begrenzt.According to the invention is in the direction of. DC power source for permanent induction derived impulse current limited by a choke coil.

VorzugsvGeise wird dabei, wie schon nach dem eingangs genannten Vorschlag, ein Unterbrecher mit konstanter Phase verwendet von der Art der Quecksilberdampflampen aller Art oder der synchron arbeitenden Schütze, die für solche kurze Schaltungen erforderlich sind; dieser Unterbrecher schaltet die Wechselwelle des Impulsstromes beim ersten Durchgang durch Null ab, und die am Ende des Impulses wieder eingesetzte Energie kann durch den Wert der benutzten Drosselspule eingestellt werden. Beim Widerstandsschweißen wird es dadurch z. B. möglich, eine Schweißstelle bis zu einem gewissen Maße auszuglühen. Das Schaltungsschema der Zeichnung veranschaulicht ein Ausführungsbeispiel. Der Kraftstromkreis i wird durch den Unterbrecher mit konstanter Phase :2 geregelt, in diesem Falle einer Quecksilberdämpflampe, und speist in Richtung des Pfeiles den Schweißtransformator 3, dessen Erregungskreis q. durch eine Drosselspule 5 geschützt ist, welche selbst in Richtung des Pfeiles im Nebenschluß vom Impulsstrom gespeist wird.As in the proposal mentioned at the beginning, preference will be given to a constant phase breaker used of the mercury vapor lamp type of all kinds or the synchronously operating contactors that are required for such short circuits required are; this interrupter switches the alternating wave of the impulse current on the first pass through zero, and that started again at the end of the pulse Energy can be adjusted by the value of the inductor used. At the Resistance welding is it z. B. possible a weld up to one to anneal to a certain extent. The circuit diagram of the drawing illustrates a Embodiment. The power circuit i is constant through the interrupter Phase: 2 regulated, in this case a mercury lamp, and feeds in the direction of the arrow the welding transformer 3, whose excitation circuit q. by a choke coil 5 is protected, which itself is shunted in the direction of the arrow by the impulse current is fed.

Claims (2)

PATENTANSPRÜCHE: i. Anordnung zum elektrischen Widerstandsschweißen mittels Energieimpulsen, die kleiner als 1/5o Sekunde sind, wobei der Transformator unmittelbar vom Stromnetz aus gespeist wird, systematisch mit halben Wellen oder Bruchteilen halber Wellen gleichen Vorzeichens eines Stromes von annähernd 5o Perioden pro Sekunde arbeitet und dauernd mit gleicher Polarität magnetisiert wird, die derjenigen entgegengesetzt -ist, welche .durch die halbe Leistungswelle erzeugt wird, vorzugsweise mit einem Schalter mit konstanter Phase, der den Impulsstromkreis beim ersten Durchgang der Stromwelle durch Null öffnet, dadurch gekennzeichnet, daß der in Richtung der Gleichstromquelle für dauernde Induktion abgeleitete Impulsstrom durch eine Drosselspule begrenzt ist. PATENT CLAIMS: i. Arrangement for electrical resistance welding by means of energy pulses that are less than 1 / 5o second, with the transformer is fed directly from the power grid, systematically with half waves or Fractions of half waves with the same sign of a current of approximately 50 periods works per second and is magnetized continuously with the same polarity as the one opposite - which is generated by half the power wave, preferably with a constant phase switch that turns the pulse circuit on the first pass the current wave opens through zero, characterized in that the in the direction of Direct current source for permanent induction, derived impulse current through a choke coil is limited. 2. Anordnung nach Anspruch i, dadurch gekennzeichnet, daß die am Ende eines jeden Impulses wieder einsetzende Energie gleicher Polarität durch den Wert der Drosselspule eingestellt ist.2. Arrangement according to claim i, characterized in that the end energy of the same polarity that is set in again for each pulse due to the value the choke coil is set.
DEP23600D 1947-12-11 1948-12-04 Arrangement for electrical resistance welding with current pulses of incomplete period Expired DE922368C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR922368X 1947-12-11

Publications (1)

Publication Number Publication Date
DE922368C true DE922368C (en) 1955-01-13

Family

ID=9437975

Family Applications (1)

Application Number Title Priority Date Filing Date
DEP23600D Expired DE922368C (en) 1947-12-11 1948-12-04 Arrangement for electrical resistance welding with current pulses of incomplete period

Country Status (1)

Country Link
DE (1) DE922368C (en)

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