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:
Mar. 03, 2015
Filed:
Jul. 02, 2010
Hideaki Onozuka, Sagamihara, JP;
Koji Utsumi, Hitachi, JP;
Toshio Yamanaka, Yokohama, JP;
Masayuki Kyoi, Yokohama, JP;
Hideaki Onozuka, Sagamihara, JP;
Koji Utsumi, Hitachi, JP;
Toshio Yamanaka, Yokohama, JP;
Masayuki Kyoi, Yokohama, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
The table on which a workpiece is put can travel on a guide rail mechanism relative to a working head with a cutting tool mounted thereon. The table is connected through a nut to a ball screw part to move in an axial direction thereof as the ball screw part rotates. One end of the ball screw part is supported by a bearing and the other end is connected to a servomotor to be rotationally driven. A hollow part is provided in the table to receive therein a damper mechanism part, which comprises a spring, a damper, and a weight, the table and the weight being arranged to enable traveling separately on guide rails. Thereby, even when the workpiece is heavy, the weight can move relative to the table to effectively damp vibrations of the table in a feed direction.