| 摘要 |
In the thread cutting method according to the present invention, the cutting amount S in each of the thread cutting operations from the second thread cutting operation to the (N-1)th thread cutting operation can be made less than and closest to the allowable cutting amount Sp in each of the thread cutting operations by respectively determining as the cutting amount S1 in the first thread cutting operation and the cutting amount Sn at a cutting depth which corresponds to the bottom of thread the values which are less than and closest to the allowable cutting amount Sp obtained at the two cutting depths. In consequence, wear of the tool can be reduced and the time required for the thread cutting process can be shortened while the thread cutting accuracy can be maintained high by determining either of two equations from the prerequisites and the processing conditions and then by designating the equation to be adopted.
|
