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:
Dec. 31, 1991
Filed:
Sep. 26, 1989
Norio Ohta, Okazaki, JP;
Yoshio Wakazono, Nagoya, JP;
Toyoda Koki Kabushiki Kaisha, Kariya, JP;
Abstract
A grinding machine for grinding outer and/or inner surfaces of a workpiece which is provided on its indexable wheel head with an outer surface grinding wheel, inner surface grinding wheel and a measuring device having a touch probe engagable with a reference surface of the workpiece. A numerical controller having a memory for memorizing data indicating positional and angular relationships between the outer surface grinding wheel, the inner surface grinding wheel and the touch probe is provided. The numerical controller first indexes the measuring device to a location facing the workpiece, and moves the workpiece along its rotational axis until the measuring device outputs a touch signal. After that, the numerical controller calculates a moving amount of the workpiece for an outer grinding operation based upon data memorized in the memory, and moves the table by the calculated amount in order to grind the outer surface of the workpiece. When a inner surface of a workpiece is machined, the inner grinding wheel is indexed to a position facing the workpiece based upon the data indicating angular relationship, after the workpiece is positioned based upon the touch signal from the measuring device. Thereafter, the table is moved based upon data indicating positional relationship between the inner surface grinding wheel and the touch probe in order to locate the inner surface grinding wheel to a predetermined grinding starting position of the inner grinding operation.