Air blowing device

The invention relates to an air blowing device used for removing sand in a hole structure in a workpiece. The air blowing device comprises a mounting frame, a fixing mechanism and an air blowing mechanism, wherein the fixing mechanism is arranged on the mounting frame and used for fixing the workpiece; and the air blowing mechanism is arranged on the mounting frame and used for blowing air flow into the hole structure to remove the sand. The air flow output by the air blowing mechanism is directly blown into the hole structure, and therefore the sand in the hole structure is rapidly removed. In this way, the hole structure can be prevented from being blocked through a rubber plug, and therefore the design and manufacturing links of the rubber plug are omitted, and cooperation of the rubber plug and the hole structure is avoided. The sand removing speed can be increased so that the machining efficiency of the workpiece can be improved, and the manufacturing cost of the workpiece can be reduced. 本发明涉及一种吹气装置，用于去