GAS NOZZLE, WELDING TORCH ASSEMBLY AND WELDING APPARATUS HAVING THE SAME

摘要

PURPOSE: A gas nozzle, welding torch assembly with the gas nozzle and a welding device having the same are provided to minimize the change of seal gas power in spite of the height change of gas nozzle. CONSTITUTION: A welding device comprises a guide part(200), a carriage part(300) and a welding torch assembly. The guide part is detachably installed to the outer circumference of the welding object. The carriage part is combined in the guide part to move along the columnar direction of the welding object. The welding torch assembly is installed in the carriage part to be faced to the welding part of the welding object.