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:
Jul. 24, 2007
Filed:
Dec. 27, 2005
Sumio Kamiya, Toyota, JP;
Hisao Iwase, Aichi, JP;
Tetsuya Nagaike, Toyota, JP;
Hiroshi Eda, Ibaraki, JP;
Libo Zhou, Hitachi, JP;
Sumio Kamiya, Toyota, JP;
Hisao Iwase, Aichi, JP;
Tetsuya Nagaike, Toyota, JP;
Hiroshi Eda, Ibaraki, JP;
Libo Zhou, Hitachi, JP;
Toyoda Jidosha Kabushiki Kaisha, Aichi, JP;
Abstract
A precision machining apparatus and a precision machining method capable of carrying out grinding with accuracy by performing switching control, for example, on a device for rotating a grinding wheel according to grinding stages through the amount of movement and constant pressure changed stepwise. To a second pedestalsupporting a rotary devicefor rotating a grinding wheel b, an actuatorand a feed screw mechanismconstituted by at least a feed screwand a nutare attached. In a rough grinding stage, the movement of the rotary deviceand the second pedestalis adjusted through a predetermined amount of movement of the nut. In a super-precision grinding stage, the movement of the rotary deviceand the second pedestalis adjusted by pressure control using stepwise a plurality of pneumatic actuatorsdiffering in pressure performance. An attitude control deviceis interposed between a first pedestaland a rotary devicefor rotating an object a to be ground.