skillssa 3 contest projects technical...
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SkillsUSA2013 Contest Projects
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Technical Drafting
2013 TECHNICAL DRAFTING PROJECT The following is excerpted from the Contest Descriptions on the SkillsUSA website: “This contest evaluates contestant's preparation for employment and recognizes outstanding students for excellence and professionalism in the field of technical drafting. The contest will focus on the solution of industry-developed problems by applying appropriate technical drafting skills and tools including computer-aided drafting (CAD).” The project this year is a Battle Top toy shown on this page. The Top Housing is shown clear yellow to provide an internal view. The mechanism is an extremely effective method for applying spin to a top. When two or more tops (it is sold with three tops) bump into each other while spinning they separate very quickly with sometimes unpredictable results. The Top Assembly is attached to the Trigger and then turned which builds potential energy in the Trigger Spring via a ratchet connection. When the Trigger is depressed, the Top is ejected which releases the stored spring energy. Project prepared by: Patrick McCuistion Ohio University
BATTLE TOPS The first three drawings in this package show the parts of the Top. The remaining parts are shown after the Top Assembly page. The instructions are to draw the following:
.3616°
.13
O.34
R.06
.80
O.03
3D geometry for all the parts, fully dimensioned detail drawings of the parts listed in the parts lists except the screw and springs, the TOP assembly drawing including item balloons and parts lists and FINAL assembly drawing including item balloons and parts lists.
The detail and assembly drawings must be on proper drawing formats and include completed title blocks. Except for the Screws and Springs, all the parts are injected using high impact polystyrene. SELF-TAPPING SCREW - #3(.099) – 28 X .25, Type B, Type 1A Cross Recessed Pan Head, .0005 thick chrome plate TRIGGER SPRING DIMENSIONS Material - UNS G10450 Wire diameter - .02 Outside diameter - .26 Free length - .62 Installed length - .50 No. of coils - 7 End treatment - Closed
TENSION SPRING DIMENSIONS Material - UNS G10450 Wire diameter - .03 Inside diameter - .34 Free length - .80 No. of coils - 11 End treatment - See views below
HOUSING
A
A
SECTION A-A
.16.25.30
.03
60°3X
60°3X
R.653X
R.086X
R.066X
O1.132X
O.66r .003
D
h .003W 0 D
R
l O.005M D R
NOTES: 1 – ALL WALL THK .05 2 – ALL DRAFT 2° MAX 3 – SURFACE FINISH SPI A-1 4 – UOS ALL DIM BASIC 5 – UOS ALL SURF
h .005 D R
CONE
A
A
SECTION A-A
.20
.38
15°24X
R.06 24X
O.97
.4524X
O.12
O.142X
.362X
O1.13
S
r .001
K
l O.005M S K
l O.01M S K
S .003 S K
.26
SEPT REQ
NOTES: 1 – ALL WALL THK .05 2 – ALL DRAFT 2° MAX 3 – SURFACE FINISH SPI A-1 4 – UOS ALL DIM BASIC 5 – UOS ALL SURF
h .003 S K
RATCHET
A
A
SECTION A-A
SO .12
30°2X
120°2X
.10
.053X
R.474X
R.066X
.10
120°2X
R.063X
R.043X
97°3X
R.06
O.30
O.23
.10.04
.09.21
.052X
R.383X
R.313X 30°3X
.073X.054X
.463X
R.033X
31°2X
B
.102X
A
R.026X
.08
r .003
M
77°3X
NOTES: 1 – ALL WALL THK .04 2 – ALL DRAFT 2° MAX 3 – SURFACE FINISH SPI D-3 4 – UOS ALL DIM BASIC 5 – UOS ALL SURF
h .005 M B A
TOP ASSEMBLY
3 0902XX004 RATCHET 1
2 0902XX002 CONE 1
1 0902XX003 HOUSING 1
ITEM NUMBER TITLE QTY
PARTS LIST
1
3
2
The assembly is held together with adhesive between the outside Diameter of the Cone (2) and the inside diameter of the Housing (1). The Ratchet (3) is contained between Housing (1) and Cone (2).
SPIN PIN
AA
SECTION A-A
.04.06
.09
.232X
.092X
.11
.10
T
.13
.401.05
.06
.05
O.25.24
O.07.06
r .003
.27 O.50.49
A
P
l O.005M M P
l O.01M P A T
M
l .01M M
NOTES: 1 – ALL WALL THK .05 2 – ALL DRAFT 2° MAX 3 – SURFACE FINISH SPI D-3 4 – UOS ALL DIM BASIC 5 – UOS ALL SURF
h .003 P A T
TRIGGER (Notes on next page)
A
A
SECTION A-A
B
DETAIL B4:1
C
DETAIL C4:1
O .52 O .37 O .43
R.34
.95
.05
1.135
.42 .05
R .356X
O .6260°6X
.06.20
.034X
.79O
22.0°6X
.60
.32.49
r .002
A
.38
.28 .21
n O .01 M A
B
C
.85
.90
O .30
h .002W 0 A B C
R.42
OUTSIDE
INSIDE
.65
.076X
.256X
68°
BOTTOM HOUSING
A
A
SECTION A-A
B
DETAIL B3:1
.0254X.45
O .102.1003X
O .195 +.002- .0003X
.50
1.15
.452X
R 8.9752X
.252X
.42.05
1.135
R 1.975
R .42
A
h .003 W .001 A
B
l O 0 M A B
l O 0 M A B
h .002 W 0 A B
O .1953Xl O .005 M A B
SEP REQT
SEP REQT
OUTSIDE
r .003
R 2.00
R .562X
R .543X
R 9.002X
1.60
INSIDE
R
.07.053X
TRIGGER NOTES: 1 – ALL WALL THK .05 2 – ALL DRAFT 2° MAX 3 – UOS ALL ROUNDS .04 4 –OUTSIDE SURFACE FINISH SPI A-1 5 – SURFACE FINISH SPI D-3 6 – UOS ALL DIM BASIC 7 – UOS ALL SURF
BOTTOM HOUSING NOTES: 1 – ALL WALL THK .05 2 – ALL DRAFT 2° MAX 3 – UOS ALL ROUNDS .04 4 –OUTSIDE SURFACE FINISH SPI A-1 5 – SURFACE FINISH SPI D-3 6 – UOS ALL DIM BASIC 7 – UOS ALL SURF
h .005 A Bh .005 A B C
TOP HOUSING
A
ASECTION A-A
R.30
R 4.00
R.563X
.30.025
SR .05
.07
.07
.38
.50
1.15
.90
1.60
R .5353X
R9.002X R8.9752X
O .083X
O .30
h .003
R4.05
O .203X
O .30
.69
.09
l O 0M A B
h .003 W .001 A
B
l O .005 M A B
l O 0M A B
l O .005 M A B
C
l O .01 M A C
.452X .252X
R .02
BB
SECTION B-B
.69
R3.00
C
C
SECTION C-C
R3.05
A
4X
1.18
.50
R2.00
R1.975
INSIDE
OUTSIDE
R
NOTES: 1 – ALL WALL THK .05 2 – ALL DRAFT 2° MAX 3 – TEXT RAISED .02
4 –OUTSIDE SURFACE FINISH SPI A-1 5 – SURFACE FINISH SPI D-3 6 – UOS ALL DIM BASIC
7 – UOS ALL SURF h .005 A B