Composite automatic machining system of hole, keyway and mark in belt pulley

The invention discloses a composite automatic machining system of a hole, a keyeay and a mark in belt pulley. The system comprises an automatic feeding and conveying system, an automatic discharging and conveying system, a hole drilling and keyway broaching working table, a milling and mark automatic drilling and broaching machine and a feeding mechanical arm system, wherein the automatic feedingand conveying system is used for feeding, the automatic discharging and conveying system is used for discharging, and the feeding mechanical arm system is used for grabbing and moving parts to be machined; a part feeding station of the automatic feeding and conveying system, a drilling and broaching station of the hole drilling and keyway broaching working table, a finished product discharging station of the automatic discharging and conveying system and a mark milling station of the milling automatic drilling, broaching and marking machine are sequentially encircled to form a circle, and a rotating path of a mechanic