Roughness Prediction Analysis of CNC Die Forgings under Spindle System Balancing
The spindle oil film stiffness will have an impact on the system balance,which further leads to the accuracy of CNC die forging.In order to improve the machining accuracy of CNC die forging machine,spindle system balance analysis is carried out based on spindle vibration information analysis plus surface corrugation degree of die forgings.In the large vertical die forging machine,aluminum is used as the processing material to carry out roughness experimental testing.The results show that similar roughness profiles are formed under simulation and measurement,and the fitting error of less than 0.006 μm indicates the accuracy of the method in this paper.The power spectral density distribution contains high amplitude frequencies,corresponding to frequencies similar to the rotation frequency,which shows that the spindle rotation error can cause changes in the roughness of the die forging.The evaluation of the roughness influencing factors shows that the influence caused by damping and unbalance is very high;the influence of stiffness,position and rotational speed does not differ much.
CNC die forgingroughnessspindle vibrationcorrelationprediction
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