Research and Application of High Quality and High Efficiency Machining Technology for Shell Small Aperture Thread

Abstract

Shell parts with complex and strange shapes are widely used in the control accessories of aero-engines,and there are many small-diameter threaded holes on the surface of such parts.Threaded hole processing is the core process of processing such parts,which can affect the processing efficiency and accuracy of the entire shell production.This processing technology has disadvantages such as poor consistency,low processing efficiency,many special fixtures,and the phenomenon of positive taper easily occurs during processing.In view of these problems,it is proposed in this paper to design a special thread milling cutter to process threaded holes,and solves the problem caused by the shortening of the cutting edge of the tool by means of a macro program.The length of the cutting edge of the tool is between one pitch and three pitches.The same tool can process threaded holes with the same pitch and different specifications.Finally,through two batches of parts machining,the actual machining of the milling cutter is verified.The experimental results show that the optimized solution can significantly improve the machining quality and efficiency of small-diameter threaded holes.

Keywords

• shell parts
• small aperture thread
• tapping
• thread milling cutter
• macro program