基于ANSYS的深孔钻削刀具系统的静动态特性分析

Static and Dynamic Characteristics Analysis of Deep-hole Drilling Tool System Based on ANSYS

深孔加工是一种仍在不断发展的综合技术。在应用中,大长径比的孔必然使得钻杆细长,工艺系统刚性差,从而造成孔的偏斜和表面质量的下降。文章从BTA刀具三向力的平衡关系着手,计算出钻削过程中不同进给量下BTA刀具每齿的受力大小,并建立BTA刀具系统的三维模型。基于BTA刀具系统的实际结构和计算结果,对BTA刀具系统施加位移和力边界条件,利用ANSYS有限元分析软件,对钻削过程中刀具系统的变形,应力分布,模态频率,响应频率等动静态特性做了预测分析。分析结果对于钻削过程中进给量的选择和避开共振区等有一定的参考价值。

Deep hole drilling technology is an integrated technique that is still developing. In the application, large length to diameter ratio makes a slender drill pipe and poor rigidly of process system inevitable, and leads to the deflection and decline of the surface quality consequently. From the perspective of the equilibrium relation of the force,the forces of each cutting edge were calculated under different drilling process, and a three-dimensional model of BTA deep drilling system was established. Based on the structure of BTA drilling system and the force calculated, displacement and force boundary conditions were applied on this system. By means of ANSYS FEM analysis software, the deformation of the drilling system, stress distribution, modal frequencies, response frequencies etc were predictive analyzed. The analysis results have a certain reference value for the choices of feed rate and avoid the resonance region.