METHOD FOR PLASMA ARC WELDING

PURPOSE:To provide the weld zone of full penetration without generating the sag of the molten pool and the projecting bead mainly at the part to be welded where the welding position is successively changed. CONSTITUTION:In a welding method where the plasma is the heat source, the capacity of the pla...

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Bibliographische Detailangaben
1. Verfasser:	YOSHINO FUMITO
Format:	Patent
Sprache:	eng
Schlagworte:	CLADDING OR PLATING BY SOLDERING OR WELDING CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS SOLDERING OR UNSOLDERING TRANSPORTING WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	PURPOSE:To provide the weld zone of full penetration without generating the sag of the molten pool and the projecting bead mainly at the part to be welded where the welding position is successively changed. CONSTITUTION:In a welding method where the plasma is the heat source, the capacity of the plasma arc is periodically changed by periodically changing the flow rate of the plasma gas. It is preferable that the period to change the flow rate of the plasma gas is relatively low below 10Hz. Concerning the flow rate of the plasma gas, it is preferable that the peak flow rate is >=1 litre/min. in the case of the plasma key hole welding, while the peak flow rate is