复杂异型零件小直径螺纹优质高效加工工艺研究与应用  

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

作　　者：陈宝来 王军 王梓懿 张昌菊 王战玺[3] CHEN Baolai;WANG Jun;WANG Ziyi;ZHANG Changju;WANG Zhanxi(Process Research Institute,China Aeroengine Guizhou Honglin Aero Power Control Technology Co.,Ltd.,Guiyang 550009,China;A Representative Office,93147 Unit of the PLA,Guiyang 550009,China;School of Mechanical Engineering,Northwestern Polytechnical University,Xi’an 710072,China)

机构地区：[1]中国航发贵州红林航空动力控制科技有限公司工艺研究所,贵阳550009 [2]中国人民解放军93147部队某代表室,贵阳550009 [3]西北工业大学机电学院,西安710072

出　　处：《航空工程进展》2022年第5期163-170,共8页Advances in Aeronautical Science and Engineering

基　　金：陕西省重点研发计划项目(2021GY-302)。

摘　　要：复杂异型壳体类零件广泛应用于航空发动机控制附件,此类零件表面分布有大量小直径螺纹孔,螺纹孔加工是影响整个壳体生产加工效率和精度的核心工序。该类零件现有的加工工艺存在一致性差、加工效率低、专用夹具多、铣螺纹时易出现正锥现象等缺点。针对上述问题,提出并设计专用螺纹铣刀对小直径螺纹孔进行加工,通过宏程序编程解决刀具刃部缩短带来的编程问题,采用刃部长度为1~3个螺距的专用螺纹铣刀,同种刀具即可实现相同螺距不同规格的螺纹孔加工。通过对两个批次的零件进行实际加工验证,结果表明:工艺优化方案可使小直径螺纹孔加工质量及加工效率得到显著提升。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.

关 键 词：壳体类零件 小直径螺纹 攻丝 螺纹铣刀 宏程序 

分 类 号：V263[航空宇航科学与技术—航空宇航制造工程] TG62[金属学及工艺—金属切削加工及机床]