Title:
DEVICE AND METHOD FOR MACHINING OFFSET EVOLUTION CURVED SURFACE
Document Type and Number:
Japanese Patent JP3879891
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a device and method which can machine a evolution curved surface at an accuracy higher than sub-micron at a position offset from a rotation center, which makes it possible to manufacture highly accurate micro lens arrays having a plurality of evolution curved surfaces or an original disk and can machine the evolution curved surface keeping an accuracy higher than sub-micro even if the cutting tool wears.
SOLUTION: This machining device is provided with a rotation driving shaft 12 for rotating a workpiece 1 around a rotation center O, a three axis driving device 14, which drives the tip section 2a of a cutting tool 2 to straightly move to and from the workpiece 1 in the three axis directions orthogonal to each other, and an NC control device 16, which numerically controls the relative positions of the tip section 2a to the position O' offset from the rotation center O. Through this constitution, a evolution curved surface rotating around the position O' offset from the rotation center O is machined by numerically controlling the angular coordinates C and the relative position coordinates X, Y and Z of the tip section 2a of the cutting tool 2.
Inventors:
Yutaka Yamagata
Sei Omori
Moriyasu Sei
Shinya Morita
Sei Omori
Moriyasu Sei
Shinya Morita
Application Number:
JP5695799A
Publication Date:
February 14, 2007
Filing Date:
March 04, 1999
Export Citation:
Assignee:
RIKEN
International Classes:
B23B5/36; B24B13/00; (IPC1-7): B24B13/00; B23B5/36
Domestic Patent References:
| JP9239603A | ||||
| JP1076437A | ||||
| JP6377638A |
Attorney, Agent or Firm:
Minoru Hotta