アルミニウム合金の穴加工面のあらさにおよぼす切削油剤の効果
1971 年 21 巻 3 号 p. 130-136
詳細
1971 年 21 巻 3 号 p. 130-136
The effects of four sorts of cutting fluids(i. e., Millcut solution, Diacut, molybdenum disulfide-kerosene mixture, and lard-kerosene mixture)on the roughness of drilled surfaces were examined in drilling of five sorts of aluminum alloys (i. e., 2024-T4, 6061-T6, 5056-F, 5052-F, and 1100-F). The experiments were conducted by dipping the whole of specimens in the fluids.
The results obtained were summarized as follows:
Much better results were obtained in surface roughness of drilled holes by drilling with cutting fluids as compared with that of dry drilled holes by drilling with no fluids. One of the reasons for these facts would be caused by the decrease in the growth of built-up edge by using cutting fluids. However, the surfaces obtained were rougher than the theoretical roughness calculated from the drill figure though in using cutting fluids. It would be attributed to the effect of walking phenomenon of the drill around the drilled holes.
In the range of experiments, lard-kerosene mixture and molybdenum disulfide-kerosene mixture were more effective in obtaining good drilled surfaces; but Millcut solution was not so effective.
The heat-treated alloys such as 2024-T4 and 6061-T6 showed good drilled surfaces; and the surfaces of non-heat-treated alloys such as 5056-F and 5052-F were slightly rougher, but they showed much better results as compared with the cases by dry drilling.
