CO2 gas shielded welding wire feeding device and usage method thereof

The invention discloses a CO2 gas shielded welding wire feeding device and a usage method thereof, and belongs to the field of CO2 gas shielded welding of the machine building industry. With the CO2 gas shielded welding wire feeding device and the usage method thereof, the problems that welding wires are prone to deforming and damaging equipment in the prior art are solved. The CO2 gas shielded welding wire feeding device structurally comprises a pinch roller (1), a wire feeding roller (2), a rubber ring (3), a CO2 gas shielded welding wire (4), a rotary pressurization handle (5), a pressurization arm (6) and an SUS guide sleeve cap (7). An open groove is formed in the pinch roller (1). An open groove is formed in the wire feeding roller (2). The pinch roller (1) and the wire feeding roller (2) are winded by the rubber ring (3). The pinch roller (1) and the wire feeding roller (2) can be tightly pressed by the pressurization arm (6). The degree of pressing can be adjusted by the rotarypressurization handle (5