The invention relates to a small steel shot feeding
circulator, which comprises a feeding motor, a dual-layer
sprocket, double chains and a plurality of feeding funnels, and is characterized in that a box body is arranged, an
impeller head installation space is arranged in the box body, and a steel shot window and a seal guard are arranged on the front wall of the box body; and the feeding motor, the dual-layer
sprocket, the double chains and the feeding funnels are arranged in the box body around the
impeller head, a feed hopper and a return hopper are arranged, and steel shots are delivered to the feed hopper through the feeding funnels. The invention additionally relates to a
numerical control metal surface treating
machine, which comprises a traveling base, an operating room, a control cabinet, a hydraulic
station, a dust catcher, the
impeller head, a movable supporting arm and a steel shot feeding circulating
system, and is characterized in that the steel shot feeding circulating
system is the small steel shot feeding
circulator, the two-dimensional movable supporting arm is adopted, and a plus or minus 180-degree rotating platform is arranged on the traveling base. The invention has the advantages that the volume is small and the weight is light, the structure is simplified, the moving range of the impeller head is widened, the operation flexibility of the entire
machine is improved, the safety stability is improved, the cost is reduced and the application scope is widened.