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. 13, 2011
Filed:
Mar. 25, 2009
Makoto Fujishima, Nara, JP;
Keizo Kashihara, Nara, JP;
Shizuo Nishikawa, Nara, JP;
Mori Seiki Co., Ltd., Yamato-Koriyama, JP;
Abstract
Relative movement in X, Y and Z axis directions is made between a main spindle and a tablefor application in a machine tool in which a work is machined. An emitting elementfor irradiating laser beamand a photosensitive elementare disposed on the table. A measuring toolwith its top end being shaped as a cone form is attached to the main spindle. The laser beamis interrupted with the cone form portionof the measuring toolthrough relative movement between the tableand measuring toolbefore and after machining a work. Detection signal of interruption is generated at the moment of interruption, position is detected, operation processing is performed so that difference in X, Y and Z axes before and after machining is obtained along with values for correction. Positional coordinate values for three axis directions are detected simultaneously with a measuring device of a simple constitution by use of laser beam and values for correction such as of thermal displacement is obtained by operation processing of displacement values.