Chemical milling device and using method thereof

A chemical milling device comprises a tank body and a workpiece rotating device arranged in the tank body, a plurality of gas spraying pipes are arranged at the bottom of the tank body, a plurality of gas spraying holes are evenly distributed in each gas spraying pipe, each gas spraying pipe is connected to a gas inlet header pipe through an independent branch pipe, a branch pipe valve is arranged on each branch pipe, and a timing opening and closing device is arranged on the gas inlet header pipe and used for opening or closing the gas inlet header pipe in a timing mode. When the chemical milling device provided by the invention is used for chemical milling, the uniformity and surface quality of titanium alloy chemical milling are practically improved by utilizing a mode of combining part rotation, a split type compressed air injection pipeline structure and intermittent type compressed air stirring. 一种化学铣装置，包括槽体和设置在槽体内部的工件转动装置，在所述槽体的底部设置有多根喷气管，在每根喷气杆上均布有多个喷气孔，每根喷气杆通过单独的支管连接至进气总管，在每根支管上设置有支管阀门，在进气总管上设置有定时启闭装