Experiments were carried out for alumina ceramics with rotary ultrasonic-assisted and ordinary milling-grinding processes respectively by using a small diameter electroplated grinding wheel. The variation of grinding force with ultrasonic power, linear speed of grinding wheel, feed rate and grinding depth during milling-grinding of alumina ceramics was analyzed. The results show that with ultrasonic power from 0 W up to 90 W and other parameters keeping constant, the grinding force is in decline and the surface topography is significantly improved. As the linear speed of grinding wheel increases, while the feed rate and grinding depth decrease, the grinding force in both rotary ultrasonic-assisted and ordinary milling-grinding processes decreases. With the processing parameters in the tested range, the grinding force in rotary ultrasonic-assisted milling-grinding process is lower compared to the ordinary milling-grinding process. Besides, the maximum reduction in normal and tangential grinding force of rotary ultrasonic-assisted milling and grinding can reach 24.17% and 23.30% respectively.
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |