The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 12, 1992
Filed:
May. 09, 1991
Masato Ryoki, Ooguchi, JP;
Kenji Ito, Ooguchi, JP;
Kabushiki Kaisha Okuma Tekkosho, Aichi, JP;
Abstract
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 S.sub.p in each of the thread cutting operations by respectively determining as the cutting amount S.sub.1 in the first thread cutting operation and the cutting amount S.sub.n at a cutting depth which corresponds to the bottom of thread the values which are less than and closest to the allowable cutting amount S.sub.p 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.