APPARATUS FOR SUPPLYING SHIELD GAS

摘要

PURPOSE: A shield gas injection system is provided to improve the quality of welding since shield gas is blown to a welded portion according to welding conditions. CONSTITUTION: A shield gas injection system comprises a gas supply pipe unit(40), a rotating drive unit(50), and a rotary supporting unit(60). The gas supply pipe unit is formed of a gas pie inside a cover pipe(43). Multiple injection slots(41) are spirally formed along the outer peripheral surface of the cover pipe. Multiple injection holes are formed along the straight line of the outer surface of the gas pipe. The gas supply pipe unit is placed along one side of each clamping unit(20). Shield gas is supplied to a welded portion. The rotating drive unit is installed on one side of a jig plate(11). The rotating drive unit provides the rotary power of a motor to the cover pipe. The rotary supporting unit rotates and supports the cover pipe.