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. 07, 2010
Filed:
Apr. 02, 2007
Harsha Badarinarayan, Novi, MI (US);
Frank Hunt, West Bloomfield, MI (US);
Kazutaka Okamoto, Novi, MI (US);
Harsha Badarinarayan, Novi, MI (US);
Frank Hunt, West Bloomfield, MI (US);
Kazutaka Okamoto, Novi, MI (US);
Hitachi, Ltd, Tokyo, JP;
Abstract
A method for monitoring the quality of a machining operation, such as a friction stir welding operation, in which a tool is rotatably driven by a motor during the machining operation. The energy consumption of the motor is determined from the initiation and to the completion of the machining operation. That energy consumption is then compared against a predetermined energy threshold. In the event that the energy consumed during the machining operation is less than the predetermined threshold, an error signal is generated.