| 摘要 |
<p>PURPOSE:To reliably feed an enough coolant to a space between a workpiece and a polishing cloth paper, to prevent the occurrence of choking with a polishing cloth paper, and to improve machining precision, by a method wherein a coolant is caused to enter from the non-contact part of the polishing cloth paper to a space between the workpiece and the contact part of the polishing cloth paper. CONSTITUTION:A work 10 is rotated in a state to press a part, in which a through-hole 68 of a polishing paper 20 is formed, against a work 10 to perform a grinding work. In this case, a coolant fed through a hose 84 fed through the through-hole (non-contact part) 68 of the polishing paper 20 to a space between the work 10 and the contact part of the polishing cloth 20. In this case, since coolant feed passages 72 and 74 are opened to projected parts 62 and 64 pressing the surroundings of the through-hole 68 against the work 10, the coolant is forced to enter between the work 10 and the polishing paper 20. The entering coolant is spread over the whole of a contact part between the polishing paper 20 and the work 10 along with rotation of the work 10 to wash out grinding powder. As a result, the occurrence of a hocking of the polishing paper 20 is reduced, and machining precision is improved.</p> |
