Species improve the surface quality of friction stir welding head modular mixing head

The present invention discloses a combined species improve the surface quality of friction stir welding head mixing head, comprising a stationary shoulder and needle stirring; the stirring by the stirring pin and the needle body composed of a root pin stirring; the lower portion of the stationary shaft shoulder machined with its cross section into a lower end surface 3 ° ~ 10 ° angle; stirring the lower end side thereof with the needle axis is inclined arcuate receiving groove; receiving said arcuate groove in contact with the workpiece at a large diameter round processing; the said needle body and the stirring was stirred root pin connector shoulder and placed in the stationary shaft by a screw; root of the needle is exposed to the stationary shaft shoulder stirred lower end surface. Of the present invention to improve the surface quality of friction stir welding head modular mixing head, can eliminate the friction stir weld joint is formed during the arc pattern, burrs, and other defects recess; rolling process can effectively reduce the generation of scratches, smooth increase in joint degree, improve the mechanical properties of the joints, and improve material utilization.