非线性减振槽在不同排布方式下抑制深孔镗削颤振的研究

Study of nonlinear damping groove under different arrangement inhibition to deep hole boring chatter

非线性减振槽能有效地抑制深孔镗削过程中的颤振,其镗刀系统输出阻尼的大小受非线性减振槽排布的影响。因此,设计了3种不同排布方式的非线性减振槽双镗杆结构:螺旋排布、交错排布以及直列排布。首先,通过Fluent软件对3种不同排布方式下的非线性减振槽的阻尼流场进行仿真,得出螺旋排布的非线性减振槽阻尼通道输出的阻尼效果更好;其次,运用Simulink软件对其动力学模型进行仿真,得出振动时域图,直观地显示了螺旋排布的非线性减振槽双镗杆结构抑制深孔镗削过程中的颤振效果更优。

For non-linear vibration damping groove controlling on deep hole boring chatter effectively,the size of the output damping effected by non-linear vibration damping groove’s configuration. Therefore,design three different arrangements of non-linear vibration damping groove double spindle structure： spiral arrangement,interlaced arrangement,and in-line configuration. First of all,do simulation to non-linear damping of vibration damping groove flow field under three different arrangements by Fluent software,which can be obtained that the non-linear vibration damping groove damping channel’s effect is better when output damping under spiral configuration; secondly,do simulation to dynamic model by Simulink software and can obtain vibration time-domain figure,which visually displays the cutting fluid inhibition effect to deep hole boring chatter is better through the spiral arrangement of slots for non-linear vibration damping channel.