钻倒角加工工艺革新

Drilling Chamfering Process Innovation

对于盘类、底面为球面的零件孔加工,每一个孔与球面均垂直,并带有1×45°的倒角。一般的工艺会先点钻定心、钻孔、倒角,再铰孔,即经历4次换刀。另外,工件材料为镍基高温合金,属于典型的难加工材料,对刀具品质有着严格要求。首先,从保证零件加工质量、提高加工效率的角度出发,提升刀具系统性能,优化零件加工工艺。其次,开发钻倒角复合刀具,合并工序。最后,给刀具系统配套热缩刀柄、带内冷通道,可优化切削参数。经过多次试验验证,改进工艺后有助于提升刀具系统的整体刚性,不仅能使孔壁质量达到相应的工艺要求,而且提高了50%以上的加工效率。

For parts with disks and spherical bottom, each hole is perpendicular to the spherical surface with 1×45° chamfer.In general, the process will start with point drilling, centering, drilling, chamfering, and then reaming, that is, four tool changes.In addition, the workpiece material is nickel base superalloy, which is a typical difficult to machine material, and has strict requirements on the quality of cutting tools. Firstly, from the perspective of ensuring the processing quality of parts and improving the processing efficiency, the performance of the tool system can be improved and the processing technology of parts can be optimized. Secondly, develop compound tools for chamfering, and combine processes at the same time. Finally, the tool system is equipped with a heat shrinkable tool handle, and the tool has an internal cooling channel, which can optimize the cutting parameters. After many experiments, it helps to improve the overall rigidity of the tool system, and the hole wall quality meets the process requirements, which can improve the processing efficiency by more than 50%.