Valve body machining machine tool for fire extinguisher valve and using method

The invention relates to the field of valve machining. The invention discloses a valve body machining machine tool for a fire extinguisher valve and a using method, and aims to solve the problems that when a machining machine tool is used for tapping multiple ports of the fire extinguisher valve, multiple working procedures are generally needed for respective machining, a large amount of manpower and time are consumed, and the machining efficiency is high. And the product quality is influenced by deviation caused by multiple times of processing, so that the overall safety and stability of the fire extinguisher are badly influenced. The tapping device is composed of a tapping mechanism, a shifting mechanism and a clamping and locking mechanism. According to the valve body machining machine tool for the fire extinguisher valve and the using method, after a nozzle pipe on a valve body makes contact with the inner wall of an arc-shaped limiting groove, the nozzle pipe of the valve body is extruded by the arc-shap