Spiral pre-precision-welding weld-in three-wire spearhead

The utility model relates to a spiral pre-precision-welding weld-in three-wire spearhead. At present, double-wire welding is generally adopted in spiral submerged-arc welding, but the double-wire welding is not suitable for producing steel pipes with the minimum diameter of 508mm, and the production...

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Bibliographische Detailangaben

1. Verfasser:	LIAO ZHONGGUI
Format:	Patent
Sprache:	chi ; 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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