The invention provides a buffer device for a
welding wire. The buffer device for the
welding wire is arranged between a first wire feeding part and a second wire feeding part, and one end of a wire feeding inner
pipe is fixedly connected with a
welding device body; the other end of the wire feeding inner
pipe can axially move; a feeding sleeve is arranged at the outer part of the wire feeding inner
pipe in a sleeving manner; and at least a part of the feeding sleeve is an axial telescopic elastic pipe. According to the buffer device, a buffer space is provided for the welding wire, the situation that the welding wire is blocked as the curvature of a wire feeding pipe is large due to relatively large welding wire back pulling quantity is reduced, the
diameter of a protection pipe is relatively small,
mass of the wire feeding pipe is reduced, gravity of the welding wire and inner and outer protection pipes is further reduced,
friction force between the welding wire and the inner and outer protection pipes is further reduced, and precision of the welding wire buffer device is improved. According to a welding
robot adopting the welding wire buffer device and a welding
system thereof, the structure of welding equipment is simplified, besides, manufacturing cost is reduced, the
production cycle is shortened, and economic practicability of the welding
robot and the welding
system thereof is improved.