Abstract:
In order to improve the machining precision and efficiency of special-shaped aerospace fasteners, centralizing and optimizing the original fastener production process, the compound multi-station special machine tool is designed. By analyzing the requirements of dimensional tolerance, surface roughness and shape and position tolerance of parts, the mechanical structural design of the machining unit and rotary plate dividing feeding were completed to satisfy the process requests. Through a single clamping, four fasteners can be processed by the machine tool at one time, reaming, reaming, chamfering angle, tapping four basic processes included. Adopting custom special composite cutting tool, the size requirements and precision requirements of the parts are satisfied. The trial production of batch samples has been complete. It meets the drawing requirements of the parts after processing verification.The processing time meets the company’s requirements of production rhythm. It provides an effective solution for the full automatic processing of similar special-shaped fasteners in the aerospace field.