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. 23, 1995
Filed:
Feb. 28, 1994
Tatsuhiro Yoshimura, Nagoya, JP;
Homare Adachi, Nagoya, JP;
Okuma Corporation, Nagoya, JP;
Abstract
A numerical control unit for a non-circular workpiece fabricating machine automatically smoothes and interpolates lift data containing errors so as to obtain new substantially error-free lift data, and allows the fabricating machine to fabricate a non-circular workpiece with a smooth rotation of a main spindle and with less vibrations of a wheel spindle stock. The numerical control unit converts lift data whose pitch is unequal into lift data whose pitch is equal. Errors in the equal pitch lift data are extended by a second finite difference calculation, are repeatedly smoothed and interpolated until they meet an application criterion. Then, the lift data are subject to inverse calculation to obtain new lift data. The new lift data are used to obtain X/C-axis data taking a diameter of the wheel spindle stock and period of time per rotation of the workpiece into consideration. Thereafter, the workpiece is fabricated on the basis of the X/C-axis data.