| 摘要 |
PROBLEM TO BE SOLVED: To shorten the grinding cycle time in grinding a rubber roll. SOLUTION: In the grinding wheel 10, a grindstone 1 for fine grinding to make the final outer diameter of the rubber roll 8 is bonded via spacers 3 to a first grindstone 2a for rough grinding and to a second grindstone 2b for rough grinding to be integrally rotated. The outer diameter D1 of the grindstone 1 for fine grinding is dressed to be larger than the outer diameter D2 of the grindstone 2 for rough grinding. First, by moving a table 13 from right to left, the first grindstone 2a for rough grinding with the outer diameter D2 is applied to the rubber roll 8 with the outer diameter d1 from the left end of the rubber ball 8, and the rubber ball 8 is roughly ground. Then just after the outer diameter of the rubber ball 8 is reduced to outer diameter d2 as the result of the rough grinding, the grinding wheel 1 for fine grinding of the outer diameter D1 is applied to the rubber roll 8 with the outer diameter d2 , and the rubber roll 8 is finished to final outer diameter d3 .
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