RUBTOR Abstract Creativity In Machine Design Eight of a Team Fall 2010 Class Work Supervisor: Prof. Minho Chang
In class, a team of six members was formed to build an experimental machine that tosses the golf ball. We were given 6 electric motors and 2 build-up kits; we learned about various operating mechanisms. Considering the weight and components of the motor, our team came up with a machine that can pick up and turn over a golf ball via the elasticity of rubber band. We scored third place in the class competition.
INTRODUCTION
Qualification Materials: provided in catalog # of motors: Maximum 6 # of kits: Maximum 2 Kit’s size: All kit(s) in 20cm*30cm*30cm Score Red ball - 3 points Yellow ball - 2 points White ball - 1 point Penalty Don’t cross the machine middle line (Power off for 10 seconds)
500
Note Don’t convert the ability of motors Power supply provides the energy
1200
<Side View>
3800
<Top View>
PROCESS TO PASS A BALL 1. COLLECTING
2. GIVING
3. PASSING
Bulldozer
Zabara
Flywheel
Rotating Arms
Conveyer
Dump
SKETCH MODELLING
Conveyor
Collector We proceeded sketch modelling and applied the elements with hand drawing.
FINAL DRAWING
205 mm
DESIGN PROCESS
After twice of critique with the professors, we decided to focus on utilizing pick up and dump abilities of collector.
3
2
1
Before
67 - 212.5 mm
<Top View>
After
We made arm(1) rotated by motor and added rubber bands(2) to pick up the ball. And also we changed the gear ratio(3) of the kit to enable it to climb the hill.
210 - 336.5 mm
<Side View>
*Scale 1:3
Three motors per one kit. We designed it satisfying with the conditions ‘# of motors: Maximum 6, # of kits: Maximum 2, Kit’s size: All kit(s) in 200mm*300mm*300mm’.
DRAWING SHEETS 13
17
21
10
3 28 12-53.3
132
219.5 215.50
20
25
3.00
48
222.00
4- 7
126
193.5
52 107
112
179.5 41.50 27.50
538
2-54.5 56
5.5
44
33.50
145
1.5
101
5
519 525
Ø6
28.50
6
42.50
10
180.50
8.30
194.5
44
2.5 6.5 20
216.50 6
220.50 6
42
43 87
10
18
14
22
26
137
137
25
127 107
16
5
19
50 25
22
15.00
450
23
56
50
92
27
26
19
20 4.50
514 3-52.50 56
50
8-53.3
4-53.30 10
35
53.3
45
Ø22.5
3
22.50 23.50
17.500 18.500 20
198.50 199.50 202.50 203.50 215.50 216.50 219.50 220.50 222
17.00 2-57.00
50
145
18.50 19.50
56
23
5.500 7.500
Ø6 Ø5
1.50 2.50 5.50 6.50
1.500 2.500
Ø5 Ø6
15
512.00
25
22
512.00
.75
17.00
92
4-53.30
3-53.00
15.5
96 104
11
40
3-53.00 2-57.00
16
16
12
.75
8
50
4-53.3 173
124
16
12
159 160
57.00
56.00
40
145 146
16
17
10.00 30 112
450
15
8-53.3
104
19 18
13.00
112
27 28
8
13 14
23
11
12
Ø6
13
15.00
14
8-53.30
20.00
40
20.00
10
33
10 30 70
12
20
30
24
20
20
16
3.00
10
182.5
13.00 15.00
23
27
186.5
25
2.00
26
6
2
153
22
2.5
21
25 19
6 5
6.5
571
24
1.5
566 536
5.5
2-Ø 53.3
512
181.5 185.5
56
27
188.00
520
22
3-52.5
21
2-57
25
24
23
56
63.50 69.50 84.50
MAKING
SIMULATION
With drawing sheet, we fabricated kits using milling, turnery, and drilling machine.
Picking up balls with their arms Dropping the ball with its arm and pushing ball with its head
DESIGN NOTE We made a design note to study mechanism of kits. Through this process, we can develop our kits more concrete and practical.
Conclusion Not only did I use the knowledge from my major for planning and constructing but also applied the knowledge into real experiments along with feedbacks from my professors. I used basic machineryproducing tools including milling machine and shelves and assembled pieces together according to the blueprint; I learned the importance of the design process fundamentals. I learned that even for a mere movement of a golf ball, the outcome may vary depending on principles and restraining conditions applied. Seeing how other had handled the experiment efficiently was also helpful.