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:
Sep. 04, 2007
Filed:
Feb. 24, 2005
Kenneth R. Bischof, Olmsted Falls, OH (US);
William J. Zdeblick, Ann Arbor, MI (US);
Kenneth R. Bischof, Olmsted Falls, OH (US);
William J. Zdeblick, Ann Arbor, MI (US);
Federal Mogul World Wide, Inc, Southfield, MI (US);
Abstract
A magnetically levitated high-speed spindle assembly () is provided for forming non-circular holes () in workpieces () or non-circular surfaces on pins. The non-circular holes () can be formed with dimensionally varying axial trajectories at high speeds and with great accuracy. This is accomplished by supporting a rotating spindle () between first () and second () magnetic bearing clusters and independently controlling these bearing clusters () to move a shaping tool () at the end of the spindle () in a predetermined orbital path (B). A multiple input-multiple output control strategy is used to control spindle () movements in the X and Y axes. The tilt angle between the cutting edge () of the shaping tool () and the orbital path (B) is maintained perpendicular under this multiple input-multiple output control of the magnetic bearing clusters () to further improve shaping precision and spindle () stability during high-speed operations.