| When the CNC machine tool is working,the cutting vibration will reduce the cutting accuracy and reduce the service life of the tool.With the development of processing and manufacturing,higher requirements have been put forward for cutting accuracy.In this paper,finite element simulation and experimental testing have been used to study vibration reduction of CNC machine tool turning tools,and manganese copper damping alloy materials have been used in turning tools.,has played a significant damping effect on the turning tool,the main research content and conclusions of this article are as follows:1.Using Patran&Nastran finite element software,the tool model of MCLNR2525M12 CNC machine tool was used as the actual research object,and a turning tool geometry model and finite element model were established.The modal analysis of the tool and its corresponding natural frequency and strain cloud diagram were obtained.Transient response analysis of the turning tool,and the time acceleration curve of the output point of the turning tool under the cyclic load excitation.2.The composite damping alloy on the surface of the shank and the damping tool for compound damping alloy on the surface of the shank are designed.The finite element method is used to analyze the transient response of various design schemes and the time-acceleration curve of the output point is obtained.The data is calculated in the form of calculated root mean square value to obtain the optimal solution.The results show that the only significant effect of vibration reduction in the damper turning tool with compound damping alloy on the surface of the arbor is the composite 3 mm damping alloy on the surface of the arbor.In the layer scheme,the root mean square values of the acceleration and steady-state accelerations are reduced to 56.53% and 30.86% of the original output values.In the vibration-reducing turning tool with composite damper alloy on the surface and inside of the tool shank,the surface of the tool shank is 9 mm in total.The damping alloy layer,which has a Z-direction damping 8mm long alloy square column,has the best damping effect during the damping period,and its acceleration RMS value is reduced to 40.40% of the original output value.The design of the 3mm damping alloy layer on the surface of the arbor,and the Y-directional through-side 10 mm damping alloy square column has the best damping effect in the stable period,and the acceleration RMS value is reduced to 32.46% of the original output value.3.Select a typical scheme for the comprehensive study,and analyze the frequency response,view the range of the resonance range,analyze the influence of the composite damping alloy of the arbor on the resonance interval and the common amplitude value.The results show that: after the composite damping alloy of the shank,The resonance frequency decreases,and the common amplitude decreases.4.Experiments were carried out on the original turning tool,the upper and lower surface of the tool bar,and the vibration-reducing turning tool with 3mm damping alloy layer,the damping tool equipped with the damping alloy pad,the damping alloy pad and the damper alloy pin.The results show that the RMS value of the acceleration measured at the actual measuring point can be reduced by 6.3% compared with the original turning tool and the total amplitude of the acceleration can be reduced by 60%.The RMS acceleration of the measured point acceleration of the vibration-damping turning tool equipped with the damping alloy blade and the damping alloy pin can be as high as 37% compared with the original turning tool.Strictly shows that the application of damping alloy to the turning tool is an effective way to reduce vibration. |
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