插耳式门铰链孔精加工方法

Method of Ear Plug Hinge Hole Finishing Machining

针对C系列后桶段插耳式门铰链制孔进行分析和论述。门口框在飞机装配后发生变形,导致门铰链同轴度超差;孔径精度要求仅为20.32μm,并且被加工材料是15-5PH耐腐蚀钢,属于难加工材料,且铰链结构复杂,所以需要设计特殊刀具。结合以上两点,从刀具设计和工装设计,以及工艺方法的改进来解决铰链孔同轴问题并且达到图纸所要求的精度。此问题的解决为其他机型铰链孔精加工提供了理论依据和实践经验。

In this article, ear plug hinge hole in the C series barrels is analyzed and discussed. The door casing deformation occurs after the aircraft assembly, which causes the door hinge alignment error. Pore size accuracy is only 20.32μm, and processed material is 15-5 PH corrosion resistant steel, which belongs to the difficult processing materials, and the hinge structure is complex, so need to design special tooling. Combining above two points, this article solves the problem of the hinge hole coaxial and meets the requirements of drawings requiring precision though the cutting tool design, tooling design and process improvements. This solution provides the theoretical basis and practical experience for other models hinge hole finishing.