摘要
Revolution radius is one of the significant parameters in orbital drilling,which has great influence on many factors,such as the cutting area of front and side cutting edge,undeformed chip geometry,delamination and burr at hole exit side,hole surface roughness,cutting tool force and deflection,chip removal and heat transmission.First,the influence of revolution radius on the factors is discussed theoretically in detail.Analysis results show that big revolution radius can reduce axial cutting force,restrain exit delamination and burr,and improve chip removal and heat transmission.Then,single factor test and orthogonal test are utilized in the two processing methods as machining unidiameter holes with several cutting tools and machining different diameter holes with one tool.Finally,the influence of revolution radius on cutting force and hole machining precision is studied.These results provide a profound foundation for future optimization of cutting control parameters.
Revolution radius is one of the significant parameters in orbital drilling, which has great influence on many factors, such as the cutting area of front and side cutting edge, undeformed chip geometry, delamination and burr at hole exit side, hole surface roughness, cutting tool force and deflection, chip removal and heat transmis- sion. First, the influence of revolution radius on the factors is discussed theoretically in detail. Analysis results show that big revolution radius can reduce axial cutting force, restrain exit delamination and burr, and improve chip removal and heat transmission. Then, single factor test and orthogonal test are utilized in the two processing methods as machining unidiameter holes with several cutting tools and machining different diameter holes with one tool. Finally, the influence of revolution radius on cutting force and hole machining precision is studied. These re- sults provide a profound foundation for future optimization of cutting control parameters.
基金
Supported by the Major Science and Technology Project(2012ZX04003-031)
作者简介
Yang Yinfei, Lecturer, E-mail： yyfgoat@nuaa. edu. cn.
