DE1117231B - Multi-point welding system - Google Patents
Multi-point welding systemInfo
- Publication number
- DE1117231B DE1117231B DEL30013A DEL0030013A DE1117231B DE 1117231 B DE1117231 B DE 1117231B DE L30013 A DEL30013 A DE L30013A DE L0030013 A DEL0030013 A DE L0030013A DE 1117231 B DE1117231 B DE 1117231B
- Authority
- DE
- Germany
- Prior art keywords
- welding
- setting
- welding system
- point welding
- throttle
- 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
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
- B23K9/00—Arc welding or cutting
- B23K9/10—Other electric circuits therefor; Protective circuits; Remote controls
- B23K9/1006—Power supply
- B23K9/1043—Power supply characterised by the electric circuit
- B23K9/1068—Electric circuits for the supply of power to two or more arcs from a single source
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding Control (AREA)
- Generation Of Surge Voltage And Current (AREA)
Description
Mehrstellen-Schweißanlage Soll eine Vielzahl von Schweißstellen mit Strom versorgt werden, so kann man hierfür Mehrstellen-Schweißanlagen benutzen. Die Mehrstellen-Schweißanlagen arbeiten mit einer konstanten Spannung, die vom Schweißstrom und von Spannungsschwankunkungen des Netzes möglichst unabhängig sein soll.Multi-point welding system Should use a variety of welding points Are supplied with electricity, so you can use multi-point welding systems for this. The multi-point welding systems work with a constant voltage generated by the welding current and should be as independent as possible of voltage fluctuations in the network.
Mehrstellen-Schweißanlagen kommen hauptsächlich im Werftbetrieb zum Einsatz und arbeiten vorwiegend nach dem in Fig. 1 dargestellten Prinzip. Auch sind Mehrstellen-Schweißanlagen für Lichtbogenschweißung mit einem für alle Schweißstellen gemeinsamen Transformator mit einer Drehstromprimärwicklung und mehreren Sekundärwicklungen bekanntgeworden, wobei jede Schweißstelle über einen Gleichrichtersatz und eine Stelldrossel dreiphasig an je eine eigene Drehstromsekundärwicklung des Transformators angeschlossen ist. Der Nachteil der Mehrstellen-Schweißanlagen besteht im wesentlichen darin, daß an dem Schweißplatz-Einstellwiderstand ein großer Teil (fast 501119) der vom Schweißgleichrichter gelieferten Energie in Wärme umgesetzt wird und nutzlos verlorengeht. Beim Schweißen wird nämlich, wenn die Spannung von 60V Leerlaufspannung auf etwa 30V Schweißspannung herabsinkt, an dem Einstellwiderstand eine Spannung von 30V vernichtet, die multipliziert mit dem Schweißstrom von 300 A eine Verlustleistung von etwa 9 kW ergibt.Multi-point welding systems are mainly used in shipyards Use and work mainly according to the principle shown in FIG. 1. Also are Multi-point welding systems for arc welding with one for all welding points common transformer with a three-phase primary winding and several secondary windings became known, with each welding point having a rectifier set and a Three-phase regulating throttle on each of its own three-phase secondary winding of the transformer connected. The main disadvantage of the multi-point welding systems is in the fact that a large part (almost 501119) of the welding position setting resistor the energy supplied by the welding rectifier is converted into heat and is useless get lost. Namely, when welding, when the voltage of 60V open circuit voltage The welding voltage drops to around 30V, a voltage across the setting resistor of 30V is destroyed, which multiplied by the welding current of 300 A results in a power loss of about 9 kW results.
Die Erfindung hat sich nunmehr die Aufgabe gestellt, eine Mehrstellen-Schweißanlage zu schaffen, bei der die Verlustenergie im Einstellwiderstand während des Schweißvorganges erheblich herabgesetzt wird.The invention has now set itself the task of a multi-point welding system to create in which the energy loss in the setting resistor during the welding process is significantly reduced.
Erfindungsgemäß wird dies dadurch erreicht, daß als Einstellwiderstand zur Einsteilung des Schweißstromes eine dreiphasige gleichstromvormagnetisierte Drossel dient, die von den in den Gleichstromventilen erzeugten Stromhalbwellen durchflossen wird.According to the invention this is achieved in that as a setting resistor a three-phase direct current pre-magnetized to adjust the welding current Throttle is used, the current half-waves generated in the DC valves is traversed.
Ein Ausführungsbeispiel der Erfindung wird an Hand von Fig. 2 der Zeichnung erläutert.An embodiment of the invention is based on Fig. 2 of Drawing explained.
Mit 1 ist ein Dreiphasentransformator bezeichnet, an dessen Ausgangsleitungen 2 die Gleichrichterventile 3 und 4 angeschlossen sind. Die Gleichrichterventile 3 sind zu einem Sternpunkt zusammengefaßt und bilden beispielsweise den Pluspol, an dem die zu verschweißenden Werkstücke 5 angeschlossen sind. Die Ausgangsleitungen der Gleichrichterventile 4 sind auf ein Sammelschienensystem 6, welches zu den einzelnen Schweißplätzen führt, geschaltet. Der Einstellwiderstand 7, der aus einer dreiphasigen Drossel besteht, ist einerseits an das Sammelschienensystem 6, andererseits an die Elektrode 8 angeschlossen. über eine Steuerwicklung mit in Reihe geschaltetem, regelbarem Widerstand 10 wird die dreiphasige Drossel 7 vormagnetisiert.1 with a three-phase transformer is referred to, on the output lines 2 the rectifier valves 3 and 4 are connected. The rectifier valves 3 are combined to form a star point and form, for example, the positive pole, to which the workpieces 5 to be welded are connected. The output lines the rectifier valves 4 are on a busbar system 6, which to the individual Welding stations leads, switched. The adjustment resistor 7, which consists of a three-phase Choke is on the one hand to the busbar system 6, on the other hand to the Electrode 8 connected. via a control winding with a series-connected, controllable Resistor 10, the three-phase choke 7 is premagnetized.
Vor Schweißbeginn stellt der Bedienungsmann den Regelwiderstand 10 zur Vormagnetisierung der Dreiphasendrossel7 auf einen bestimmten Wert ein, um den für den Schweißvorgang erforderlichen Schweißstrom sowie die erforderliche Strom-Spannungs-Charakteristik zu erhalten. Die Schweißstromeinstellung, die nicht wie bisher über einen ohmschen Widerstand, sondern nach der Erfindung über einen induktiven Widerstand vorgenommen wird, hat den großen Vorteil, daß die Verlustenergie nunmehr erheblich herabgesetzt worden ist. Dadurch wird der Wirkungsgrad der Gesamtanlage wesentlich verbessert.Before starting the welding, the operator sets the variable resistor 10 for the premagnetization of the three-phase choke 7 to a certain value in order to obtain the welding current required for the welding process and the required current-voltage characteristic. The welding current setting, which is not carried out via an ohmic resistor, but according to the invention via an inductive resistor, has the great advantage that the energy loss has now been considerably reduced. This significantly improves the efficiency of the overall system.
Es empfiehlt sich, die Mehrstellen-Schweißanlage mit einer höheren Frequenz als die Netzfrequenz zu betreiben, um kleine Abmessungen und Gewichte der Einstelldrossel zu erhalten. Dies kann beispielsweise durch Verwendung eines dreiphasigen Frequenzwandlers an Stelle eines Dreiphasentransformators 1 erreicht werden oder durch Speisen eines Dreiphasentransformators mit einer höheren Eingangsfrequenz.It is advisable to use the multi-point welding system with a higher Operate frequency than the mains frequency to the small dimensions and weights of the To obtain setting throttle. This can be done, for example, by using a three-phase Frequency converter can be achieved in place of a three-phase transformer 1 or by feeding a three-phase transformer with a higher input frequency.
Die letztgenannte Anordnung hat darüber hinaus den Vorteil, daß auch der Dreiphasentransformator 1 bezüglich seiner Abmessungen und Gewichte wesentlich kleiner ausgeführt werden kann.The latter arrangement also has the advantage that the three-phase transformer 1 is essential in terms of its dimensions and weights can be made smaller.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEL30013A DE1117231B (en) | 1958-03-24 | 1958-03-24 | Multi-point welding system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEL30013A DE1117231B (en) | 1958-03-24 | 1958-03-24 | Multi-point welding system |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1117231B true DE1117231B (en) | 1961-11-16 |
Family
ID=7265070
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEL30013A Pending DE1117231B (en) | 1958-03-24 | 1958-03-24 | Multi-point welding system |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE1117231B (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1144857B (en) * | 1962-02-03 | 1963-03-07 | Aeg | Process for supplying alternating current with 50 Hz and higher frequency to workpieces that are to be conductively heated over the entire cross section or partially, and arrangement for performing the process |
DE1179656B (en) * | 1963-09-17 | 1964-10-15 | Knapsack Ag | Control device for direct current welding machines with pre-magnetized choke in the direct current welding circuit |
DE1206104B (en) * | 1963-07-02 | 1965-12-02 | Harnischfegir Corp | DC arc welding system |
EP0953397A2 (en) * | 1998-04-27 | 1999-11-03 | Esseti S.r.l. | Welding plant and associated components, with centralised generator and switching conversion devices decentralised on mobile unit |
-
1958
- 1958-03-24 DE DEL30013A patent/DE1117231B/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1144857B (en) * | 1962-02-03 | 1963-03-07 | Aeg | Process for supplying alternating current with 50 Hz and higher frequency to workpieces that are to be conductively heated over the entire cross section or partially, and arrangement for performing the process |
DE1206104B (en) * | 1963-07-02 | 1965-12-02 | Harnischfegir Corp | DC arc welding system |
DE1179656B (en) * | 1963-09-17 | 1964-10-15 | Knapsack Ag | Control device for direct current welding machines with pre-magnetized choke in the direct current welding circuit |
EP0953397A2 (en) * | 1998-04-27 | 1999-11-03 | Esseti S.r.l. | Welding plant and associated components, with centralised generator and switching conversion devices decentralised on mobile unit |
EP0953397A3 (en) * | 1998-04-27 | 2000-07-26 | Esseti S.r.l. | Welding plant and associated components, with centralised generator and switching conversion devices decentralised on mobile unit |
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