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:
Feb. 14, 2006
Filed:
Oct. 19, 2004
Junichi Hirai, Hitachi, JP;
Hiroshi Arai, Hitachiota, JP;
Tamotsu Harihara, Fujisawa, JP;
Osamu Chiba, Hitachinaka, JP;
Masaaki Takahashi, Hitachi, JP;
Nobuhisa Kanamaru, Hitachi, JP;
Junichi Hirai, Hitachi, JP;
Hiroshi Arai, Hitachiota, JP;
Tamotsu Harihara, Fujisawa, JP;
Osamu Chiba, Hitachinaka, JP;
Masaaki Takahashi, Hitachi, JP;
Nobuhisa Kanamaru, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi Software Engineering Co., LTD, Yokohama, JP;
Abstract
A numerically controlled curved-surface machining unit equipped with three linearly moving axes and, at least, one rotary axis, including a simultaneous multiple-axis control NC machine numerically controlled by a numerical control unit with a numerical control NURBS interpolation function. The unit enables reading, as CL (cutter location) data, tool control point vector data and tool axis vector data, along a machining direction on a workpiece coordinate system for a curved surface, obtaining feed rates therefor, and calculation by conversion of the CL data into position vectors of three linear axes on a machine coordinate system, rotation angles and feed rates on the machine coordinate system so as to operate the simultaneous multiple-axis control NC machine on the basis of a machine configuration of the simultaneous multiple-axis control NC machine. The unit forms at least one NURBS curve having continuous curvature, calculates data therefor and converts the NURBS curve into NC data for NURBS interpolation.