COPPER DISC FOR SAPPHIRE POLISHING, AND METHOD OF REPAIRING DOUBLE-FACE COPPER DISC

WIPO Patent Application WO/2015/192784

A1

A copper disc for sapphire polishing; the annular surface of the copper disc (1) is provided with spiral or concentric circular grinding grooves (11) thereon; and a stepped groove (12) is provided at the edges along both the outer ring and inner ring of the annular surface of the copper disc. Also provided is a method of repairing a double-face copper disc for sapphire polishing, comprising: first step, horizontally and transversally moving an upper copper disc and a lower disc turning tool, or a lower copper disc and an upper disc turning tool, and aligning the turning tool with the original position of the grinding groove on the corresponding copper disc; second step, controlling the upper copper disc and the lower copper disc to rotate in opposite directions at the same rotation speed and with the turning tools fixed, controlling the upper copper disc or the lower copper disc to be fed transversely, and turning a corresponding grinding groove via the turning tools; third step, removing the turning tools and washing the surface of the corresponding copper discs.

JP4318692	Abrasive whetstone
JP4121464	Cup type rotary whetstone

ZHOU QUNFEI (CN)
RAO QIAOBING (CN)
FU LIANG (CN)

PCT/CN2015/081779

December 23, 2015

June 18, 2015

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LENS TECHNOLOGY CO LTD (CN)

B24D7/00

CN202174508U	2012-03-28
CN202428347U	2012-09-12
CN104044087A	2014-09-17
CN203918808U	2014-11-05
JP2011044473A	2011-03-03

QIHEYUAN PATENT PROPERTY LAW FIRM (GENERAL PARTNERSHIP) (CN)
长沙七合源专利代理事务所（普通合伙） (CN)

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