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:
Oct. 01, 2013
Filed:
Dec. 05, 2007
Keiji Mizuta, Hiroshima, JP;
Yoshiharu Ozawa, Ritto, JP;
Mutsumi Yoshikawa, Ritto, JP;
Rimpei Kawashita, Takasago, JP;
Keiji Mizuta, Hiroshima, JP;
Yoshiharu Ozawa, Ritto, JP;
Mutsumi Yoshikawa, Ritto, JP;
Rimpei Kawashita, Takasago, JP;
Mitsubishi Heavy Industries, Ltd., Tokyo, JP;
Abstract
Spindle inclination detectors (A,B) are equipped in columns (A,B) of a portal bridge () of a machine tool (). Each spindle inclination detector includes: a string () which hangs vertically with an upper end fixed to the column (reinforcement ()) and a lower end attached to a weight (); a gap sensor () which is attached to the string to measure a distance to a front face plate () of the column; and an oil damper (). Moreover, a spindle inclination correction controller provided to the machine tool controls a Peltier device (A,B) attached to a rear face plate () of the column, on a basis of an average distance measured by the gap sensor, and thus corrects an inclination of a spindle () due to the thermal deformation of the column by correcting thermal deformation of the column.