The invention discloses a
machining processing method of parts with a long shaft and a
thin wall, belonging to the technical field of mechanical
machining. The
processing method comprises the following steps: firstly selecting the required
metal material, then performing baiting, thermal refining, roughly
machining,
ageing at high and low temperatures, half precisely machining and precisely machining, and finishing the machining after the passed inspection; during the half precise machining, the outer circle of the part with the long shaft and
thin wall is preserved with the machining residue; during the precisely machining, an expandable shoulder
plunger piston clamp is used for matching with the part to
machine; the other end of the part is reserved with a technical
handle and provided with a central hole so as to locate through the outer
diameter of the clamp and the inner hole of the part; and the outer
diameter of the clamp is regulated so that the outer
diameter is properly matched with the inner hole of the part. By using the
processing method, the problems that the part with the long shaft and
thin wall is easy to deform during the mechanical machining, is incapable of reaching the requirement of the technical parameter, and is low in machining yield are solved.