Double side grinding apparatus and double side polishing apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Dec 26, 2000
Grant Date -
N/A
app pub date -
Feb 18, 1999
filing date -
Mar 4, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A double side grinding apparatus and a double side polishing apparatus, with a narrow tolerance range, reduces pitching errors, and ensures a sufficient level of rigidity against the force of reaction to machining, while enhancing positioning accuracy. The double side grinding apparatus or a double side polishing apparatus includes a plurality of guideways for supporting and shifting main spindles, and these plural guideways on end define a geometric center matched with the center of gravity of the main spindles. The number of the guideways is preferably three in order not to obstruct the mounting and removal of a workpiece.
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