Title:
METHOD OF ABRADING FOREIGN OBJECT ON WORKPIECE SURFACE, AND FOREIGN OBJECT ABRASION DEVICE
Document Type and Number:
WIPO Patent Application WO/2011/061884
Kind Code:
A1
Abstract:
A defect on the surface of a workpiece is captured, and information for correction is prepared. On the basis of this information, the height of a foreign object requiring correction is measured. If this measured height is less than the first standard value, shift is made to a usual abrasion process. If the measured height is not less than the first standard value and is less than the second standard value, shift is made to a temporary abrasion process. If the measured height is not less than the second standard value, it is determined that no abrasion should be performed. In the aforementioned temporary abrasion process, an abrasion head is lowered only by a predetermined amount. Subsequently, an abrasion tape is paid out from a supply reel, and the foreign object is ground in such a way that while rewinding the abrasion tape with a rewinding reel, the abrasion head is used to press the abrasion tape between the supply reel and the rewinding reel. Thereafter, it is checked whether a change occurred in the height of the foreign object. In a case where a change occurred in the height, shift is made to a usual abrasion process. In a case where no change occurred in the height, no abrasion is performed. Due to the above, even if a large and high-hardness foreign object sticks to the surface of the workpiece, it is possible to minimize reduction in processing capability and to prevent breakage of the abrasion tape and occurrence of dragging damage to the workpiece.
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Inventors:
SATOH HITOSHI
FUJII SHIGEKI
FUJII SHIGEKI
Application Number:
PCT/JP2010/005395
Publication Date:
May 26, 2011
Filing Date:
September 01, 2010
Export Citation:
Assignee:
SHARP KK (JP)
SATOH HITOSHI
FUJII SHIGEKI
SATOH HITOSHI
FUJII SHIGEKI
International Classes:
B24B21/00; B24B27/033; B24B49/12
Foreign References:
| JP2007237344A | 2007-09-20 | |||
| JP2007290092A | 2007-11-08 | |||
| JP2008093740A | 2008-04-24 | |||
| JPH1190796A | 1999-04-06 |
Attorney, Agent or Firm:
MAEDA, Hiroshi et al. (JP)
Hiroshi Maeda (JP)
Hiroshi Maeda (JP)
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