Tool wear model is presented by firstly extracting power signal eigenvalue through tool wear analysis of special spiral rod milling,and then establishing the mapping between the signal eignevalue and the tool wear value.

In the process of milling special spiral rod,a comparative analysis of all kinds of signals that indicate the state of tool wearing has been made.

This paper analysises problems of the adaptive control of special spiral rod processing,brings forward an adaptive control system taking mental removal rate (MRR) as input,the vibration strength as output,establishes a method to caculate the MRR in processing and identifies the system and obtains the reference model based on the collection and disposal of vibration signal.