1. ISU Project
Rock Drill
By Shin Joong Hun, Wei Xin and Park Chanik

2. What is the rock drill?
• It’s a machine with a pointed
end for making holes.

3. How does the rock drill work?

4. The mechanical vibration
equation
•

5. Movement of Hammer
• Generally the hammer of the rock drill moves 50~120
hertz, which means it finishes 50 to 120 cycles of
movement in a second.
• We set the cycle is 50,
and the amplitude is 0.2 cm.

6. Key Features & Graph for
Movement of Hammer
•

7. Digging Depth
• The Rock Drill digs the ground about 0.6cm in a second
• However, as time goes, the depth of digging decrease
because the ground become harder as it goes deeper

8. Key Features for
Digging Depth
•

9. Graph for
Digging
Depth

10. Key Features for
Combined Function
•

11. Graph for Rock Drill

12. With this graph…
• We can find how deep we can dig with the rock drill for a
previous time
• We can find the position of the Hammer of the drill at a
previous time

13. Thank you !