Machining tool and method for outer molded surface of thin-wall deep-cavity cover type part

The invention relates to a machining tool and method for an outer molded surface of a thin-wall deep-cavity cover type part, and belongs to the technical field of advanced manufacturing. The machining tool is structurally designed to be an inner supporting structure tool, the tool is divided into an upper section, a lower section, a left section and a right section, the overall appearance conforms to an inner molded surface, inner supporting threaded holes are formed in the sections and used for installing inner supporting screws, and the tool and the inner molded surface of a machining part are completely supported and attached by adjusting the inner supporting screws. During machining, the molded surface needing to be machined is milled according to the sections of the tool, the supporting and attaching degree of the section dividing tool and the inner molded surface of the machining area can be adjusted at any time in the machining process, machining receding and springback are reduced, and the wall thickn