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:
Apr. 21, 2020
Filed:
Oct. 28, 2014
Mitsubishi Electric Corporation, Tokyo, JP;
Citizen Watch Co., Ltd., Tokyo, JP;
Citizen Machinery Co., Ltd., Kitasaku-gun, Nagano, JP;
Mitsuo Watanabe, Tokyo, JP;
Masakazu Sagasaki, Tokyo, JP;
Yuki Hirata, Aichi, JP;
Kazuhiko Sannomiya, Nagano, JP;
Takaichi Nakaya, Nagano, JP;
Mitsubishi Electric Corporation, Chiyoda-ku, Tokyo, JP;
CITIZEN WATCH CO., LTD, Nishitokyo-shi, Tokyo, JP;
CITIZEN MACHINERY CO., LTD., Miyotamachi, Nagano, JP;
Abstract
A numerical control apparatus includes: a drive unit controlling a main shaft rotating a workpiece, a first drive shaft feeding a cutting tool relatively to the workpiece along a perpendicular direction to a lead direction of a thread, and a second drive shaft feeding the cutting tool relatively to the workpiece along the lead direction; and a vibration unit superimposing, on movement of the first drive shaft, vibration having a period having a predetermined ratio with a rotation period of the main shaft, and forms a thread on the workpiece by moving the cutting tool and the workpiece relative to each other and performing cut processes on the workpiece. The numerical control apparatus includes a thread-cutting vibration adjustment unit controlling the drive unit to shift phase of the vibration with respect to phase of the main shaft by a predetermined vibration phase shift amount every time in the cut processes.