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ドリルのシンニングに関する研究 (第2報 各種被削材に対する最適形状) 小栗, 幹男 丹羽, 裕美 text Thinning effects on various work-materials, 0.35% carbon-steel, aluminium anticorrosion alloy and 4:6 brass, in drilling are investigated on the basis of the measured results, the cutting forces and the accuracies of drilled hole. Main conclusions obtained are the followings. (i) In drilling used the standard type drill that the chisel edge is not modified, the length of a transient period in thrust force makes a difference from material to material. Carbon-steel has the longest period and brass has the shortest one. (ii) It was confirmed from the measured results of thrust that type P and N_1 thinning were more effective than other for drilling carbon-steel and aluminium alloy, and type P thinning was the most effective on brass, (iii) Moreover, it was recognized from the measurements of dimensional difference between the drilled hole diameter and the drill diameter that the difference was able to reduce by making a choice of appropriate thinning for work-materials. The reason is that the thrust decreases by thinning and as the results a deflection of drill axis reduces. 愛知教育大学 1983-01-25 jpn departmental bulletin paper VoR http://hdl.handle.net/10424/3301 https://aue.repo.nii.ac.jp/records/1124 AN00006773 0388-7367 愛知教育大学研究報告. 芸術・保健体育・家政・技術科学 32 89 99 https://aue.repo.nii.ac.jp/record/1124/files/kengei328999.pdf application/pdf 484.1 kB 2017-03-27