The invention provides a friction-stir
welding device. The friction-stir
welding device comprises a
flange base, a main
machine box, a
ball screw pair, a guide rail sliding block, an electric spindle,a stirring tool, a limiting plate, a
constant pressure sensor and an A-axis driving
servo motor. The
flange base is used for connecting third-party equipment. The main
machine box and the ball screwpair are connected with the
flange base. The guide rail sliding block and the electric spindle are arranged on the main
machine box. The stirring tool is connected to the electric spindle in a boltingmanner. The limiting plate and the
constant pressure sensor keep the static state relative to the electric spindle. The A-axis driving
servo motor is connected with the
ball screw pair. The guide rail sliding block serves as a sliding support for the electric spindle along the A axis. The
constant pressure sensor is used for acquiring the real-
time pressure feedback numerical value when a shaft shoulder end face of the stirring tool makes contact with the surface of a part to be welded. The A-axis driving
servo motor receives the real-
time pressure feedback numerical value and controls the A-axis press-in regulating quantity of the stirring tool according to the real-
time pressure feedback numerical value. The friction-stir
welding device is easy and convenient to operate, can achieve welding of more types of light
alloy more flexibly in a wider range, and is stable in operation and convenient to move.