1 0 0 0 412 電場による切削工具の改質
- 著者
- 照井 充 福田 勇夫 加藤 明彦 藤城 恒夫 周 立波 江田 弘
- 出版者
- 一般社団法人日本機械学会
- 雑誌
- 茨城講演会講演論文集 : Ibaraki district conference
- 巻号頁・発行日
- vol.2001, pp.99-100, 2001-09-20
It is experimentally known that the insert tools significantly change in their cutting performances when being subject to an electric field. For example, electrically/magnetically treated inserts show mach longer tool life (average 2 times) than those untreated. This research takes the first step to develop a very low cost system for electrical/magnetic insert treatment, and systematically investigate the electrical effects on the tool performance. A series of cutting tests have been executed to compare the tool performances between the treated/untreated tools. The tool performance has been evaluated from viewpoint of magnetic flux distribution, hardness and flank wear. The ultimate results lead to an analytical conclusion and a principle for tool performance optimization.
1 0 0 0 OA 実験とシミュレーションによる砥粒径のばらつきがウエハ研削面に与える影響の調査
- 著者
- 蛯名 雄太郎 前崎 智博 周 立波 清水 淳 小貫 哲平 尾嶌 裕隆 乾 正知
- 出版者
- 公益社団法人 精密工学会
- 雑誌
- 精密工学会誌 (ISSN:09120289)
- 巻号頁・発行日
- vol.84, no.7, pp.640-645, 2018-07-05 (Released:2018-07-05)
- 参考文献数
- 16
The grinding wheel is comprised by three elements; abrasive grain, bonding material and pore, which are specified by five factors; type of abrasive grain, grain size, type of bonding material, grade of hardness and abrasive grain volume percentage. Regarding the abrasive grain, it is well known that shape and number of cutting edge significantly effects grinding performance such as surface roughness, grinding force and grinding wheel life. In general, abrasive grain size is determined by mean diameter of abrasive grain. However, the abrasive grains in a grinding wheel are randomly scraggly in size and shape. There is no particular aspect to regulate the grain size variation in JIS (Japanese Industrial Standards). This paper investigates the effect of grain size variation on the ground surface topography by actual grinding on silicon wafers and analysis based on grinding simulation. The results reveal that the standard deviation of grain size is a very important index to characterize the grinding performance of a wheel. Smaller standard deviation leads to larger density of effective cutting-edge under the same volume percentage of abrasive grain contained in the wheel. This fact significantly contributes to not only achieve a better surface roughness and more uniform surface integrity, but also shorten the finishing time.