軟鋼材에서 Drill dead center 偏心量이 구멍의 크기에 미치는 影響에 대한 考察 = On the hole size according to eccentric size of the drill dead center in the mild steel

다국어 초록 (Multilingual Abstract)

In general, when we drill the mild steel plate, the twist drill has been used.
As the eccentric is used without the drill required, the diameter of hole becomes bigger than that of the twist drill.
If we used the eccentric dead center of the drill, we could have it.
This study based on detecting the relation of function with the eccentric and diameter of worked hole and for the purpose of getting easily the hole required.
The method of experiment was accomplished 10 times to give eccentric size (0.0, 0.2, 0.4, 0.6, and 0.8mm)to each drill size(1/4, 3/8, and 1/2 inch).
So the average measuring size would be given. The results are as follows
1. 1/4 inch drill
y□1.25x+d1+0.1mm
2. 3/8 inch drill
y□1.40x+d2+0.1mm
3. 1/2 inch drill
y~1.00x+d3+0.1mm
y : hole size
x : ceccentric size
d1 : diameter of 1/4 inch
d2 : diameter of 3/8 inch
d3 : diameter of 1/2 inch

목차 (Table of Contents)

• 緖言
• 實驗器機 및 材料
• 實驗方法
• 實驗結果 및 考察
• 要約
• 참고문헌